From tim at tdw.net  Fri Mar 30 09:08:40 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 30 Mar 2007 14:08:40 +0100
Subject: Sending emails to 3 addresses....
In-Reply-To: <B69357484.8.7032.2@mxextra>
References: <B69357484.8.7032.2@mxextra>
Message-ID: <9afea2ac0703300608n6d7e7605hb42e7ce0d63b2f91@mail.gmail.com>

On 30/03/07, Boudreau, Emile <Emile.Boudreau at cognos.com> wrote:
>
> sendMail('this is the subject line', 'the results: 71 fails, 229 pass, 300
> total.', 'user1 at mycompany.com, user2 at mycompany.com, user3 at mycompany.com')
>
> def sendMail(subject, body, TO, FROM="machine at mycompany.com"):
>     print TO
>     HOST = "exchange.mycompany.com"
>     BODY = string.join((
>         "From: %s" % FROM,
>         "To: %s" % TO,
>         "Subject: %s" % subject,
>         "",
>         body
>         ), "\r\n")
>     server = smtplib.SMTP(HOST)
>     server.sendmail(FROM, [TO], BODY)
>     server.quit()
>

Emile,

You are passing the TO addresses as 3 addresses in a single string.
[TO] results in a list containing a single string - not a list
containing 3 individual addresses.

You need to either pass the addresses to the function as a list
containing the 3 addresses as individual strings,  or change

[TO]

to

TO.split(',')


HTH :)


From rebeccagcox at gmail.com  Sun Mar 11 19:05:50 2007
From: rebeccagcox at gmail.com (rebeccagcox at gmail.com)
Date: 11 Mar 2007 16:05:50 -0700
Subject: Phase change material ...
In-Reply-To: <3tEIh.4571$B25.683@news01.roc.ny>
References: <1173405474.489111.139350@p10g2000cwp.googlegroups.com>
	<1173554707.826932.246100@30g2000cwc.googlegroups.com>
	<3tEIh.4571$B25.683@news01.roc.ny>
Message-ID: <1173654350.311432.51480@v33g2000cwv.googlegroups.com>

Hey, thermate--could you check your post on China from January and
respond. Thanks.



From will at willNOmcguganSPAM.com  Sat Mar 10 11:24:30 2007
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Sat, 10 Mar 2007 16:24:30 +0000
Subject: Announcing BBCode parsing module
Message-ID: <45f2dbc1$0$2453$db0fefd9@news.zen.co.uk>

Hi,

I have written a BBCode parsing module that may be of use to some 
people. It turns BBCode in to XHTML snippets. See the following page if 
you are interested...

http://www.willmcgugan.com/2007/03/10/bbcode-python-module/


Will McGugan
-- 
blog: http://www.willmcgugan.com


From n00m at narod.ru  Sat Mar 17 23:54:33 2007
From: n00m at narod.ru (n00m)
Date: 17 Mar 2007 20:54:33 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174189566.189546.85510@y80g2000hsf.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
	<1174158002.730076.22720@y80g2000hsf.googlegroups.com>
	<1174166115.263201.51840@d57g2000hsg.googlegroups.com>
	<1174189566.189546.85510@y80g2000hsf.googlegroups.com>
Message-ID: <1174190073.112097.29160@l75g2000hse.googlegroups.com>

my dial-up line's too slow for downloading 4mb of shedskin-0.0.20.exe



From lbates at websafe.com  Thu Mar 29 12:40:05 2007
From: lbates at websafe.com (Larry Bates)
Date: Thu, 29 Mar 2007 11:40:05 -0500
Subject: how can I clear a dictionary in python
In-Reply-To: <460bcf46$0$23128$426a74cc@news.free.fr>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com>
	<KP-dnXOp7ea8IZbbnZ2dnUVZ_oCmnZ2d@comcast.com>
	<460bcf46$0$23128$426a74cc@news.free.fr>
Message-ID: <460BEBE5.3030607@websafe.com>

Bruno Desthuilliers wrote:
> Larry Bates a ?crit :
>> Aahz wrote:
>>> In article <4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d at comcast.com>,
>>> Larry Bates  <lbates at websafe.com> wrote:
>>>> Marko.Cain.23 at gmail.com wrote:
>>>>> I create a dictionary like this
>>>>> myDict = {}
>>>>>
>>>>> and I add entry like this:
>>>>> myDict['a'] = 1
>>>>> but how can I empty the whole dictionary?
>>>> just point myDict to an empty dictionary again
>>>>
>>>> myDict={}
>>> Go back and read Christian's post, then post a followup explaning why
>>> his
>>> solution is better than yours.  Your explanation should use id().
>>
>> I believe he (as many new to Python do) are mired in old
>> programming thinking that variables "contain" things.
> 
> Does "he" refer to Christian Tismer ? If so, you may want to use google
> and correct your beliefs (hint: does 'stackless Python' ring a bell ?).
> 
>> As I'm sure you kno, variables point to things in Python.
> 
> (conceptually) names are keys associated with an object in a given
> namespace. FWIW, be assured that Christians knows this pretty well.
> 
>> I don't believe that there are lots of other objects
>> pointing to this dictionary.
> 
> You just cannot *know* this. This might be true now, this might be false
> now, and this might change anytime. Assuming anything here is the road
> to disaster. Don't assume, do the righ thing.
> 
>>  Perhaps the OP can clarify
>> for us.  If there aren't other objects pointing to
>> this dictionary it would make NO sense to iterate over a
>> dictionary and delete all the keys/values
> 
> You don't iterate over anything. Dicts being the central datastructure
> in Python, you can bet your ass they are optimized to death (or near
> death). If you have any doubt, then still don't assume : verify (hint:
> import timeit). And yet even if clearing a dict happens to be a bit
> slower than instanciating a new one, rebinding a name and mutating an
> object are still two very different concepts in Python, with very
> different consequences. The OP explicitely asked for clearing a dict,
> not for creating a new one.
> 
>> so I tried to read
>> between the lines
> 
> Why ?
> 
>> and answer what I believe the OP thought he
>> was asking.
> 
> What the OP asked was quite clear, and not subject to any
> interpretation. And the correct answer is obviously not the one you gave.
> 
>>  BTW-I didn't see you posting an answer to what
>> you thought was the "correct" question, just criticizing me
>> for taking the time to answer what I perceived the OP was
>> asking.
> 
> If you cannot understand the difference between criticism and a friendly
> correction,  nor why you should actually thank the one correcting you
> when you're wrong, I guess there's no point trying explaining why
> correcting wrong answers on newsgroups is actually important.

I stand corrected about my answer, but I'll stick to my assumption
(until told otherwise by the OP) that the question that was asked
wasn't precisely what the OP wanted to accomplish.  It was just too
simple to mean what you guys assumed (e.g. complex dictionary pointed
to by lots of other objects, etc.).  I don't mind being corrected with
the proper information, but Aahz's post doesn't make any sense.  He said
"Go back and read Christian's answer...". Christian's answers were not
answers to the OP's question at all.  Here is what shows up in my
newsreader:

'''
Reading the Python docs might help.
But before, I would try a dir(myDict).
Maybe you will find an easter-egg
which has exactly the name you are looking for?

cheers - chris
'''

and

'''
This is wrong and not answering the question.
Creating a new dict does not change the dict.
He wants to clear *this* dict, and maybe he
cannot know how many other objects are
referring to this dict.

cheers -- chris
'''

You appear to be the only one that apparently posted the correct
answer myDict.clear() for which I thank you.  I learned two things
today: 1) answer EXACTLY the question that is asked and 2) dicts
have a clear method that is safer than my answer.

-Larry




From gagsl-py2 at yahoo.com.ar  Tue Mar 27 17:50:21 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 Mar 2007 18:50:21 -0300
Subject: urllib timeout issues
References: <1175023315.536080.276550@n76g2000hsh.googlegroups.com>
	<mailman.5681.1175026431.32031.python-list@python.org>
	<1175028104.429759.165920@n76g2000hsh.googlegroups.com>
Message-ID: <op.tpvax7jex6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 Mar 2007 17:41:44 -0300, supercooper <supercooper at gmail.com>  
escribi?:

> On Mar 27, 3:13 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Tue, 27 Mar 2007 16:21:55 -0300, supercooper <supercoo... at gmail.com>
>> escribi?:
>>
>> > I am downloading images using the script below. Sometimes it will go
>> > for 10 mins, sometimes 2 hours before timing out with the following
>> > error:
>>
>> >     urllib.urlretrieve(fullurl, localfile)
>> > IOError: [Errno socket error] (10060, 'Operation timed out')
>>
>> > I have searched this forum extensively and tried to avoid timing out,
>> > but to no avail. Anyone have any ideas as to why I keep getting a
>> > timeout? I thought setting the socket timeout did it, but it didnt.
>>
>> You should do the opposite: timing out *early* -not waiting 2 hours- and
>> handling the error (maybe using a queue to hold pending requests)
>>
>> --
>> Gabriel Genellina
>
> Gabriel, thanks for the input. So are you saying there is no way to
> realistically *prevent* the timeout from occurring in the first

Exactly. The error is out of your control: maybe the server is down,  
irresponsive, overloaded, a proxy has any problems, any network problem,  
etc.

> place?  And by timing out early, do you mean to set the timeout for x
> seconds and if and when the timeout occurs, handle the error and start
> the process again somehow on the pending requests?  Thanks.

Exactly!
Another option: Python is cool, but there is no need to reinvent the  
wheel. Use wget instead :)

-- 
Gabriel Genellina



From deets at nospam.web.de  Mon Mar  5 11:49:59 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 Mar 2007 17:49:59 +0100
Subject: worker thread catching exceptions and putting them in queue
References: <45ec4936$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <55301nF2339mvU2@mid.uni-berlin.de>

Paul Sijben wrote:

> All,
> 
> in a worker thread setup that communicates via queues is it possible to
> catch exceptions raised by the worker executed, put them in an object
> and send them over the queue to another thread where the exception is
> raised in that scope?
> 
> considering that an exception is an object I feel it ought to be
> possible, however I do not see how to go about it.
> 
> does anyone have a pointer towards the solution?


Just raise the exception object found in the queue. Only make sure it _is_
an exception, as you can raise everything. So in your queue-putting-code
you might consider discriminating between the two cases, like this:


while True:
   try:
      result = 1, work()
   except:
      result = 2, sys.exc_info()[1]
   queue.put(result)

-------
while True:
   kind, result = queue.get()
   if kind == 1:
      do(result)
   elif kind == 2:
      raise result


Diez


From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 05:48:09 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 19:48:09 +1000
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.22.59.05@mailinator.com>
	<pan.2007.03.25.03.40.32.158357@REMOVE.THIS.cybersource.com.au>
	<pan.2007.03.25.07.10.22@mailinator.com>
Message-ID: <pan.2007.03.25.09.48.08.378542@REMOVE.THIS.cybersource.com.au>

On Sun, 25 Mar 2007 07:10:23 +0000, Mark wrote:

> On Sun, 25 Mar 2007 13:40:33 +1000, Steven D'Aprano wrote:
>> Because this is entirely a trivial saving. Who cares? Sheesh.
>> ...
>> Saving 18ms on a script that takes 50ms to execute *might* be
>> worthwhile, ...
> 
> I don't understand your attitude. Sure, we are talking slight savings in
> machine efficiency but I am sure the python developers have laboured
> many long hours on subtle optimisations of the virtual machine, many of
> which probably dwarf the issue discussed here. Tell them their work is
> trivial and unnecessary.

Why would I do that?

As you said yourself, their optimizations dwarf the trivial issue you
discuss. They, unlike you, grasp that the aim of optimization is to make
significant savings in meaningful places, not waste time making
insignificant savings in meaningless places.


> Every little bit helps. 

No it doesn't. Spending hours of effort to save 18 seconds a day is a
waste of both time and effort.

If you have a process that takes eight hours and 18 seconds to run, and
you need it to run in eight hours or less, then that 18 seconds is
absolutely critical. But how likely is that? Chances are nobody will care
if the process takes eight hours and ten minutes or seven minutes and
fifty minutes. Saving 18ms once at startup for a single script, or 18
seconds over the course of an entire day, pales into insignificance. 



> Why do I concern myself
> with this inefficiency - because it is there.

Fine fine -- except the hours you spend solving it is an inefficiency a
million times bigger than the one you are concerned with.

Okay, that's not fair -- it might take you hours to solve it once, but
from that moment on, you can save 18ms every time you run a script. In the
course of a day, you might save 18 seconds. In just 600 working days,
you'll have made that time back, and every 18ms after that is pure gain!

BFD.

Except, of course, that each time you type that one extra character, you
lose 160ms to gain 18ms. You're actually going backwards.

And that's the thing that demonstrates that for all your talk of
efficiency, you're not really interested in efficiency. If you were, you'd
do the maths and, having discovered that it costs you 160ms to save 18ms,
you're actually *less* efficient.


> Of course I realise the modern mantra that "premature optimisation is
> the root of all evil" but I don't subscribe to it. 

That's nice.

> Programmers have been
> "encouraged" to not give a toss about efficiency 

Blathering on about saving 18ms might make you feel good, but that's not
efficient. Making the code run 18ms faster at the expense of the total
process running 140ms slower is a pessimation, not an optimization.


-- 
Steven.



From cjlesh at gmail.com  Mon Mar 19 22:30:38 2007
From: cjlesh at gmail.com (cjl)
Date: 19 Mar 2007 19:30:38 -0700
Subject: difference between urllib2.urlopen and firefox view 'page source'?
Message-ID: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>

Hi.

I am trying to screen scrape some stock data from yahoo, so I am
trying to use urllib2 to retrieve the html and beautiful soup for the
parsing.

Maybe (most likely) I am doing something wrong, but when I use
urllib2.urlopen to fetch a page, and when I view 'page source' of the
exact same URL in firefox, I am seeing slight differences in the raw
html.

Do I need to set a browser agent so yahoo thinks urllib2 is firefox?
Is yahoo detecting that urllib2 doesn't process javascript, and
passing different data?

-cjl



From adam at atlas.st  Tue Mar  6 10:48:48 2007
From: adam at atlas.st (Adam Atlas)
Date: 6 Mar 2007 07:48:48 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173193691.204641.206600@s48g2000cws.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<1173193691.204641.206600@s48g2000cws.googlegroups.com>
Message-ID: <1173196128.443793.170900@t69g2000cwt.googlegroups.com>

Doesn't seem to work. I guess zipimport doesn't support that by
default... but if I remember correctly, Setuptools adds that. Maybe
I'll take a look at how it does it (I think by extracting the .so to /
tmp?) and see how easy it would be to integrate it here.



From davidnicolson1 at hotmail.com  Wed Mar 28 10:01:05 2007
From: davidnicolson1 at hotmail.com (David Nicolson)
Date: Thu, 29 Mar 2007 00:01:05 +1000
Subject: shutil.copy Problem
In-Reply-To: <eUbOh.3434$Kd3.2921@newssvr27.news.prodigy.net>
References: <mailman.5648.1174965082.32031.python-list@python.org>	<1174970535.061022.141230@l77g2000hsb.googlegroups.com>	<BAY105-DAV16498BE4BF3A127F6369E9956E0@phx.gbl>
	<mailman.5667.1174999208.32031.python-list@python.org>
	<eUbOh.3434$Kd3.2921@newssvr27.news.prodigy.net>
Message-ID: <BAY105-DAV24721889DE3999F910D02956D0@phx.gbl>

Hi John,

That was an excellent idea and it was the cause problem. Whether this  
is a bug in shutil I'm not sure.

Here is the traceback, Python 2.4.3 on Windows XP:

> C:\Documents and Settings\G?stav>C:\python243\python Z:\sh.py
> Copying  u'C:\\Documents and Settings\\G\xfcstav\\My Documents\\My  
> Music\\iTunes
> \\iTunes Music Library.xml' ...
> Traceback (most recent call last):
>   File "Z:\sh.py", line 12, in ?
>     shutil.copy(xmlfile,"C:iTunes Music Library.xml")
>   File "C:\python243\lib\shutil.py", line 81, in copy
>     copyfile(src, dst)
>   File "C:\python243\lib\shutil.py", line 41, in copyfile
>     if _samefile(src, dst):
>   File "C:\python243\lib\shutil.py", line 36, in _samefile
>     return (os.path.normcase(os.path.abspath(src)) ==
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xfc in  
> position 27: ordinal
> not in range(128)

Here is the code:

> import _winreg
> import os
> import shutil
>
> reg = _winreg.ConnectRegistry(None, _winreg.HKEY_CURRENT_USER)
> key = _winreg.OpenKey(reg, r"Software\Microsoft\Windows 
> \CurrentVersion\Explorer\Shell Folders", 0, _winreg.KEY_READ)
> mymusic = _winreg.QueryValueEx(key, "My Music")[0]
>
> xmlfile = os.path.join(os.path.join(mymusic,"iTunes"),"iTunes Music  
> Library.xml")
> print "Copying ",repr(xmlfile),"..."
>
> shutil.copy(xmlfile,"C:\iTunes Music Library.xml")

The shutil line needed to be changed to this to be successful:

> shutil.copy(xmlfile.encode("windows-1252"),"C:\iTunes Music  
> Library.xml"


Regards,
David


On 27/03/2007, at 4:47 PM, John Nagle wrote:

> Facundo Batista wrote:
>> David Nicolson wrote:
>>
>>
>>> Thanks, but it's definitely not the print. In original the code the
>>> print statements are replaced by a call to a log method.
>>>
>>> Besides, the exception would be different if it was thrown  
>>> outside of
>>> the try block.
>>
>>
>> The best you can do is take the piece of code that has the  
>> problem, show
>> it to us, and then copy the traceback.
>>
>> Regards,
>
>    There may be some problem here with a file being recognized as  
> Unicode
> in binary mode.  That shouldn't happen, but looking at the Windows
> UNICODE support, it might not be impossible.
>
>    Information needed:
>
> 	- Platform (Windows, Linux, ...)
> 	- Python version
> 	- A hex dump of the first few bytes of the input file.
>
> 					John Nagle
> -- 
> http://mail.python.org/mailman/listinfo/python-list





From jnews at julius-net.net  Tue Mar  6 15:07:45 2007
From: jnews at julius-net.net (Matthias Julius)
Date: Tue, 06 Mar 2007 15:07:45 -0500
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<1172774172.389220.124170@j27g2000cwj.googlegroups.com>
	<1172834556.768612.164050@8g2000cwh.googlegroups.com>
	<mailman.4698.1173146386.32031.python-list@python.org>
Message-ID: <87abyq5e5q.fsf@julius-net.net>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:

> En Fri, 02 Mar 2007 08:22:36 -0300, Bart Ogryczak
> <B.Ogryczak at gmail.com> escribi?:
>
>> On Mar 1, 7:36 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
>> wrote:
>>> Thanks Bart.  That's perfect.  The other suggestion was to precompute
>>> count1 for all possible bytes, I guess that's 0-256, right?
>>
>> 0-255 actually. It'd be worth it, if accessing dictionary with
>> precomputed values would be significantly faster then calculating the
>> lambda, which I doubt. I suspect it actually might be slower.
>
> Dictionary access is highly optimized in Python. In fact, using a
> precomputed dictionary is about 12 times faster:

Why using a dictionary and not a list?

Matthias


From rds1226 at sh163.net  Thu Mar  8 21:05:01 2007
From: rds1226 at sh163.net (John)
Date: Thu, 8 Mar 2007 21:05:01 -0500
Subject: any better code to initalize a list of lists?
References: <esqc9r$cn09$1@netnews.upenn.edu>
	<7xlki7dx5m.fsf@ruckus.brouhaha.com>
Message-ID: <esqfea$cne0$1@netnews.upenn.edu>

I want to radix sort non-negative integers that can fit into 32-bits. That 
will take 4 passes, one for each byte. So, I will need 256 "buckets"
The list radix of 256 elements of list is good for this purpose.

Your code is much shorter, works and probably takes less time.

Thanks!

John


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message 
news:7xlki7dx5m.fsf at ruckus.brouhaha.com...
> "John" <rds1226 at sh163.net> writes:
>> For my code of radix sort, I need to initialize 256 buckets. My code 
>> looks a
>> little clumsy:
>>
>> radix=[[]]
>> for i in range(255):
>>     radix.append([])
>>
>> any better code to initalize this list?
>
> Typically you'd say
>   radix = [[] for i in xrange(256)]
>
> but what are you really doing?  This plan to implement radix sorting
> sounds a little bit odd, unless it's just an exercise.
>
> You could also consider using a dictionary instead of a list,
> something like:
>
>   radix = defaultdict(list) 




From namesagame-usenet at yahoo.com  Sun Mar 18 15:17:52 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: 18 Mar 2007 12:17:52 -0700
Subject: Renaming or Overloading In Python
Message-ID: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>

Hi,

I'm a recent convert from TCL.  One of the more powerful aspects of
TCL is the ability to rename a function at will (generally for testing
purposes).

Example from the tcl doc:

rename ::source ::theRealSource
set sourceCount 0
proc ::source args {
    global sourceCount
    puts "called source for the [incr sourceCount]'th time"
    uplevel 1 ::theRealSource $args
}

So, is such a thing possible in Python?

Thanks,
-T



From cousinstanley at hotmail.com  Tue Mar  6 13:47:43 2007
From: cousinstanley at hotmail.com (Cousin Stanley)
Date: Tue, 06 Mar 2007 12:47:43 -0600
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
Message-ID: <1173206863_18689@sp6iad.superfeed.net>


> I have a PC behind a firewall, and I'm trying to programmatically
> determine the IP address visible from outside the firewall.
> ....

Steven .... 

  Following is another alternative that might at least
  be worth consideration ....

  I use the  lynx  command shown as a command-line alias
  under Debian linux ....
 
>>>
>>> import os
>>>
>>> pipe_in = os.popen( 'lynx --dump http://checkip.dyndns.org' )
>>>
>>> ip_addr = pipe_in.readlines()
>>>
>>> for this in ip_addr :
...     print this
...


   Current IP Address: 65.39.92.38


-- 
Stanley C. Kitching
Human Being
Phoenix, Arizona


----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----


From grante at visi.com  Fri Mar 30 19:13:51 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 30 Mar 2007 23:13:51 -0000
Subject: Newbie Question (real-time communication between apps: audio, 3d,
	PD, Blender)
References: <1175294306.124030.272350@l77g2000hsb.googlegroups.com>
Message-ID: <130r6df92n4rp04@corp.supernews.com>

On 2007-03-30, gregorywieber at gmail.com <gregorywieber at gmail.com> wrote:

> I'm just beginning my exploration of Python and I have a rather
> general question. If two particular programs have Python scripting
> capabilities, does that mean those two programs can communicate in
> real time through Python?

No.

-- 
Grant Edwards                   grante             Yow!  Yow! Is my fallout
                                  at               shelter termite proof?
                               visi.com            


From aleax at mac.com  Sun Mar 18 23:54:15 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 20:54:15 -0700
Subject: list comprehension help
References: <mailman.5246.1174234283.32031.python-list@python.org>
	<1174269687.497013.249480@o5g2000hsb.googlegroups.com>
Message-ID: <1hv6v32.17ahray13d45puN%aleax@mac.com>

George Sakkis <george.sakkis at gmail.com> wrote:

> On Mar 18, 12:11 pm, "rkmr... at gmail.com" <rkmr... at gmail.com> wrote:
> 
> > Hi
> > I need to process a really huge text file (4GB) and this is what i
> > need to do. It takes for ever to complete this. I read some where that
> > "list comprehension" can fast up things. Can you point out how to do
> > it in this case?
> > thanks a lot!
> >
> > f = open('file.txt','r')
> > for line in f:
> >         db[line.split(' ')[0]] = line.split(' ')[-1]
> >         db.sync()
> 
> You got several good suggestions; one that has not been mentioned but
> makes a big (or even the biggest) difference for large/huge file is
> the buffering parameter of open(). Set it to the largest value you can
> afford to keep the I/O as low as possible. I'm processing 15-25 GB
> files (you see "huge" is really relative ;-)) on 2-4GB RAM boxes and
> setting a big buffer (1GB or more) reduces the wall time by 30 to 50%
> compared to the default value. BerkeleyDB should have a buffering
> option too, make sure you use it and don't synchronize on every line.

Out of curiosity, what OS and FS are you using?  On a well-tuned FS and
OS combo that does "read-ahead" properly, I would not expect such
improvements for moving from large to huge buffering (unless some other
pesky process is perking up once in a while and sending the disk heads
on a quest to never-never land).  IOW, if I observed this performance
behavior on a server machine I'm responsible for, I'd look for
system-level optimizations (unless I know I'm being forced by myopic
beancounters to run inappropriate OSs/FSs, in which case I'd spend the
time polishing my resume instead) - maybe tuning the OS (or mount?)
parameters, maybe finding a way to satisfy the "other pesky process"
without flapping disk heads all over the prairie, etc, etc.

The delay of filling a "1 GB or more" buffer before actual processing
can begin _should_ defeat any gains over, say, a 1 MB buffer -- unless,
that is, something bad is seriously interfering with the normal
read-ahead system level optimization... and in that case I'd normally be
more interested in finding and squashing the "something bad", than in
trying to work around it by overprovisioning application bufferspace!-)


Alex


From tiedon_jano at hotmail.com  Mon Mar  5 07:39:54 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Mon, 05 Mar 2007 12:39:54 GMT
Subject: Building a dictionary from a tuple of variable length
In-Reply-To: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>
References: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>
Message-ID: <ucUGh.162$%i1.72@read3.inet.fi>

bg_ie at yahoo.com kirjoitti:
> Hi,
> 
> I have the following tuple -
> 
> t = ("one","two")
> 
> And I can build a dictionary from it as follows -
> 
> d = dict(zip(t,(False,False)))
> 
> But what if my tuple was -
> 
> t = ("one","two","three")
> 
> then I'd have to use -
> 
> d = dict(zip(t,(False,False,False)))
> 
> Therefore, how do I build the tuple of Falses to reflect the length of
> my t tuple?
> 
> Thanks for your help,
> 
> Barry.
> 

Another variation:

d = dict((x, False) for x in t)

Cheers,
Jussi


From mark.english at rbccm.com  Tue Mar 27 14:01:01 2007
From: mark.english at rbccm.com (MarkE)
Date: 27 Mar 2007 11:01:01 -0700
Subject: Handling exception thrown by Boost.Python c-extension in Python code
Message-ID: <1175018461.183511.30770@n76g2000hsh.googlegroups.com>

I'm just getting started on Boost Python and may have missed this
obvious looking problem somewhere.

Given a c-extension "testext" written using Boost Python containing a
base class "Base", a derived class "Derived", and a function
"doSomething" which expects a "Derived" parameter, if I pass it a
"Base" parameter an exception is thrown. This is a
Boost.Python.ArgumentError. My question is how do I catch this error ?

I tried the following bit of investigation:
#Start code
import testext
b = testext.Base()
try:
   testext.doSomething(b)
except Exception, e:
    pass
help(e.__class__)
#End code

which produces
#Start output
Help on class ArgumentError:

class ArgumentError(exceptions.TypeError)
 |  Method resolution order:
 |      ArgumentError
 |      exceptions.TypeError
 |      exceptions.StandardError
 |      exceptions.Exception
 |
 |  Methods inherited from exceptions.Exception:
 |
 |  __getitem__(...)
 |
 |  __init__(...)
 |
 |  __str__(...)
#End output

"print e" produces "<Boost.Python.ArgumentError instance>"

So I could handle this by writing an except clause for TypeError.

Boost.Python doesn't exist as a module i.e. it's not in sys.modules,
and I don't know how to import it - should there be a Boost.Python
module somewhere on my PythonPath that I've forgotten to setup ?
Is there a standard way of catching these errors by their actual
type ?
Is there an easy way to export the exception classes from my c-
extension (testext) so that I can use that ? Thus "except
testext.ArgumentError" would catch the "Boost.Python.ArgumentError" ?

Thanks for any help,
Mark



From lucastorri at gmail.com  Mon Mar 12 10:50:49 2007
From: lucastorri at gmail.com (Lucas Torri)
Date: Mon, 12 Mar 2007 11:50:49 -0300
Subject: New to Python
In-Reply-To: <200703120202.07810.albmont@centroin.com.br>
References: <200703120202.07810.albmont@centroin.com.br>
Message-ID: <b58273130703120750p4c444026x98017a0fb79d56b5@mail.gmail.com>

Something like that?

z = tuple(map(lambda x,y: x+y, x, y))

On 3/11/07, Alberto Vieira Ferreira Monteiro <albmont at centroin.com.br>
wrote:
>
> Hi, I am new to Python, how stupid can be the questions I ask?
>
> For example, how can I add (mathematically) two tuples?
> x = (1,2)
> y = (3,4)
> How can I get z = (1 + 3, 2 + 4) ?
>
> Alberto Monteiro
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From newsuser at stacom-software.de  Fri Mar 16 09:19:56 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Fri, 16 Mar 2007 14:19:56 +0100
Subject: String formatting with fixed width
Message-ID: <ete5df$juo$1@online.de>

Hello alltogether,

is it possible to format stings with fixed width of let's say 7 character. T 
need a floating point with 3 chars before dot, padded with ' ' and 3 chars after 
dot, padded with '0'.

Followingh is my approach
 >>> f = 21.1
 >>> s = "%.03f" % f
 >>> s
'21.100'

But there are missing ' '. How can I get that? (For bigger numbers than 999 they 
might be cut: 1021 -> 021)

Alexander


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 05:43:12 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 11:43:12 +0200
Subject: creating "jsp-like" tool with python
In-Reply-To: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>
References: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>
Message-ID: <460795b0$0$28815$426a74cc@news.free.fr>

jd a ?crit :
> I'd like to create a program that takes files with "jsp-like" markup
> and processes the embedded code (which would be python) to produce the
> output file.  There would be two kinds of sections in the markup file:
> python code to be evaluated, and python code that returns a value that
> would be inserted into the output.
> 
> This seems like it would be straightforward in python, and maybe
> there's even a library that I could use for this, but as a newbie to
> Python, I don't know the landscape very well.  I am not looking for a
> big framework, just something small and simple that will do just this
> job.  Suggestions or pointers would be greatly appreciated.

There are already quite a few Python templating solutions. You may want 
to look for:
- Python server pages
- Mighty
- Mako
- Jinja
- Genshi
- Cheetah
- Newov
- Zope Page Templates
- SimpleTAL (standalone implementation of ZPT)
- (add your favorite Python templating system here)


From ptmcg at austin.rr.com  Fri Mar 16 09:39:18 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Mar 2007 06:39:18 -0700
Subject: Mastering Python
In-Reply-To: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
Message-ID: <1174052358.486071.163280@e65g2000hsc.googlegroups.com>

On Mar 16, 6:41 am, "Gerald" <gerald... at gmail.com> wrote:
> Hi ,Im a BSc4 Maths/Computer Science student.Unfortunately my
> curriculum did not include Python programming yet I see many vacancies
> for Python developers.I studied programming Pascal,C++ and Delphi.So I
> need to catch up quickly and master Python programming.How do you
> suggest that I achieve this goal?Is python platform independent?What
> is the best way?And how long would it take before I can develop
> applications using python?Can you recommend websites that feature a
> gentle introduction to Python?

Stop thinking about *how* to start and *just start*.  Python is pretty
intuitive, especially if you have other language background to relate
to.  Download the Python dist for your platform (Linux? probably
already there - Windows? binary installers from python.org or
activestate will install in a snap).  Run through the first few pages
of any of the dozen or more online tutorials to start getting your
fingernails dirty.  You'll need a text editor with integrated building
- I find SciTE and PyScripter to be good for beginners (and I still
use SciTE after 4 years of Python programming).

You know C++ and Pascal?  You already know the basic if-then-else,
while, and for control structure concepts.  Here are some C++-to-
Python tips:
- There's no switch statement in Python.  Make do with cascading if/
elif/else until you come across the dict dispatch idiom.
- There's no '?' operator in Python.  If you download the latest
version (2.5), there is an equivalent "x if y else z" which would map
to "y ? x : z" using the ternary operator.  But lean towards explict
readability vs. one-liner obscurity at least for a few days.
- Forget about new/delete.  To construct an object of type A, call A's
constructor using "newA = A()".  To delete A, let if fall out of
scope, or explicitly unbind the object from the name "newA" with "newA
= None".
- Forget about "for(x = 0; x < 10; x++)".  Python loops iterate over
collections, or anything with an __iter__ method or __getitem__
method.  This is much more like C++'s "for(listiter = mylist.first();
listiter != mylist.end(); ++listiter)".  To force a for loop to
iterate 'n' times, use "for i in range(n):".  The range built-in
returns the sequence [0, 1, 2, ..., n-1]. Don't commit this beginner's
blunder:
  list1 = [ 1, 2, 3 ]
  for i in range(len(list1)):
      # do something with list1[i]
Instead do:
  for elem in list1:
      # do something with elem, which points to each element of
      # list1 each time through the loop
If you really need the list index, use enumerate, as in:
  for i,elem in enumerate(list1):
      print "The %d item of the list is %s" % (i,elem)
(Hey, check out those string formatting placeholders, they borrow
heavily from C's printf notation.  Oh, they don't teach that anymore,
and you used iostreams in C++ instead?  Bummer.)
- Forget about braces {}'s.  For some reason, this is a big deal for
some people, but give it a chance.  Just indent code as you would
normally, and leave out the braces.  Personally I set my editor to
replace tabs with spaces, this is a style choice - but do NOT mix tabs
and spaces.  In the end, you will find this liberating, especially if
you have ever been on a project that had to define a coding standard,
and spent way too much time (more then 30 seconds) arguing about
"where the braces should go."
- Don't forget the ()'s.  To invoke a method on an object, you must
include the parens.  This wont do anything:
  a = "some string"
  a = a.lower
You need this:
  a = a.lower()
- Stop thinking about variables as addresses and storage locations,
and start thinking about them as values bound to names.  Even so, I
still find myself using words like "assignment" and "variable", when
strictly I should be saying "binding" and "name".

What does Python have that C++ doesn't?
- The biggie: dynamic typing (sometimes called "duck typing").
Dynamic typing is a huge simplifier for development:
  . no variable declarations
  . no method type signatures
  . no interface definitions needed
  . no templating for collections
  . no method overloading by differing argument type signatures
("Imagine there's no data types - I wonder if you can...").  What? No
static type-checking at compile time?  Nope, not really.  If your
method expects an object of type X, use it like an X.  If it's not an
X, you may be surprised how often this is not a problem.  For
instance, here's a simple debugging routine:
def printClassOf(x):
    print x.__class__.__name__
Every object has the attribute __class__ and every class has the
attribute __name__.  In C++, I'd have to go through extra contortions
*not* to type the variable x, probably call it something non-intuitive
like "void*".  Or look at this example:
def printLengthOf(x):
    print "Length of x is", len(x)
x could be any collection class, or user-defined class that is
sufficiently like a collection to support len (such as implementing
the __len__ method).  This class doesn't even have to exist when you
write printLengthOf, it may come along years later.
- An interactive interpreter.  Awfully handy for just trying things
out, without having to go through the compile/link/run cycle.  Also
good for getting at documentation on built-in and custom objects and
methods - type "help(blah)" to get help on method or class blah.
- Language built-in types for list, tuple (a type of list that is
immutable), dict (akin to map<x,y> in the C++ STL), and set.  Since
Python does dynamic typing, no need to templatize these collection
types, just iterate over them and use the objects in them.
  . Lists look like [ 1, 2, 3, "ABC", [ 4,5 ] ]
  . Tuples look like ( "Bob", "Smith", "12345 River St.", 52 )
  . Dicts look like { "Bob" : 52, "Joe" : 24 }
  . Sets look like set("A", "B", "C")
- Language built-in types for string and unicode
- Multiple variable assignment - you can unpack a list into individual
variables using:
  a,b,c = 1,2,3
  list1 = [ 4,5,6 ]
  a,b,c = list1  (will assign 4 to a, 5 to b, and 6 to c)
Forget about the classic C chestnut to swap a and b:
  a ^= b; b ^= a; a ^= b;
Just do:
  a,b = b,a

- Compound return types - need 3 or 4 values returned from a
function?  Just return them.  No need for clunky make_pair<>
templates, or ad hoc struct definitions just to handle some complex
return data, or (ick!) out parameters.  Multiple assignment will take
care of this:
  def func():
      return 4,5,6

  a,b,c = func()

- Flexible and multiline quoting.  Quoted string literals can be set
of using ""s, ''s, or triple quotes (""" """, or ''' ''').  The triple
quote versions can extend to multiple lines.
- Built-in doc strings.  If you have a function written like this:
  def func():
      "A function that returns 3 consecutive ints, starting with 4"
      return 4,5,6
then typing "help(func)" at the interactive interpreter prompt will
return the string "A function that...".  This is called the function's
docstring, and just about any object (class, function, module) can
have one.
- A huge library of common application modules.  The latest version
includes support for the SQLite database.

And a part of the Python "getting it" that usually takes place in the
first hour or two of *just starting* is encapsulated in the Zen of
Python.  Type "import this" at the interpreter command line, and
you'll see a list of basic concepts behind the language and its
design.  It is true, there are some dorky in-jokes in there, but look
past them and pick up the nuggets of Python wisdom.

Wow, are you still reading?  Quit wasting time and go download a
Python dist and get started already!

-- Paul



From bbxx789_05ss at yahoo.com  Fri Mar 16 02:02:57 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 15 Mar 2007 23:02:57 -0700
Subject: Pickle Problem
In-Reply-To: <YtpKh.13194$tD2.5920@newsread1.news.pas.earthlink.net>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
	<mailman.5135.1173973120.32031.python-list@python.org>
	<1173979442.025584.282090@e65g2000hsc.googlegroups.com>
	<YtpKh.13194$tD2.5920@newsread1.news.pas.earthlink.net>
Message-ID: <1174024977.766602.258380@p15g2000hsd.googlegroups.com>

> I'm trying to make the transition from Java

> The biggest thing that was messing me up was the
> mandatory "self" input. For some reason I was thinking
> that, if I had parenthesis, I would have to define it.

I think things are pretty similar in Java.  Java does the same thing
except 'self' is invisible in Java, and in Java 'self' is called
'this'.  For instance, in Java you can write:

int num;

void setNum(int num)
{
      this->num = num
}

Where did 'this' come from?  In Java, methods are passed the invisible
'this' argument, which you can then access inside the method.  It
looks like Python just "uncloaks" Java's 'this'.




From alan.franzoni_invalid at geemail.invalid  Fri Mar  2 08:45:32 2007
From: alan.franzoni_invalid at geemail.invalid (Alan Franzoni)
Date: Fri, 2 Mar 2007 14:45:32 +0100
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
Message-ID: <rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>

Il 28 Feb 2007 14:09:09 -0800, sjdevnull at yahoo.com ha scritto:


> Seems obvious and desirable to me.  Bare "=" is the way you assign a
> name to an object; saying "NAME =" will rebind the name, breaking the
> connection between a and b.  Without it, they continue to refer to the
> same object; extending the list (via += or .extend) mutates the
> object, but doesn't change which objects a and b are referencing.

Well... the main problem is not with the '+=' operators themselves, it's
with the 'global coherence'. I would assume then, that if the '+=' operator
is assumed to modify objects in-place, it would just fail on immutable
objects, wouldn't I?

I mean... I don't like that. I'm not really a Python expert, I found this
behaviour is documented in the language reference itself:

http://docs.python.org/ref/augassign.html

But... I don't know, still think it's confusing and not going to use it.

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From greg at cosc.canterbury.ac.nz  Sat Mar 10 04:16:52 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 10 Mar 2007 22:16:52 +1300
Subject: number generator
In-Reply-To: <pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
Message-ID: <55fbgjF2492skU1@mid.individual.net>

Steven D'Aprano wrote:

> Last but not least, another possible algorithm is to start with a list of
> N numbers, regardless of whether or not they add to M, and then adjust
> each one up or down by some amount until they sum to the correct value.

Another possibility is to generate a list of N non-random
numbers that sum to M, and then adjust them up or down
by random amounts. By performing up/down adjustments in
pairs, you can maintain the sum invariant at each step.
So then it's just a matter of how long you want to go
on fiddling with them.

--
Greg


From steve at holdenweb.com  Thu Mar 22 18:50:59 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 18:50:59 -0400
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <1174603221.600706.62210@p15g2000hsd.googlegroups.com>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>	<mailman.5449.1174564707.32031.python-list@python.org>	<1174567006.244721.115890@n59g2000hsh.googlegroups.com>	<zazMh.15244$tD2.5343@newsread1.news.pas.earthlink.net>
	<1174603221.600706.62210@p15g2000hsd.googlegroups.com>
Message-ID: <etv1b4$f37$2@sea.gmane.org>

Godzilla wrote:
> On Mar 23, 4:38 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>> On 22 Mar 2007 05:36:46 -0700, "Godzilla" <godzillais... at gmail.com>
>> declaimed the following in comp.lang.python:
>>
>>> Steve, I think I've tried what you have suggested without any luck as
>>> well... The statement works fine, but what inserted is not correct...
>>> it seems like only the symbol '?' was inserted into the blob field...
>>         You didn't have a set of 's around the ?, did you? Parameter
>> substitution will add needed quotes on its own rather than you having to
>> put in quotes.
>>
>>         Also, though I find no documentation on it, odbc module cursors have
>> setinputsizes() and setoutputsizes() methods -- perhaps that could
>> change things... OTOH: the db-api 1.0 PEP (which is, it seems, what odbc
>> module follows) says they may be do-nothing methods.
>> --
>>         Wulfraed        Dennis Lee Bieber               KD6MOG
>>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>>                 HTTP://wlfraed.home.netcom.com/
>>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>>                 HTTP://www.bestiaria.com/
> 
> Everything seems to work fine right now... thanks all of you for
> helping... Have a great day..
> 
Have you any idea what fixed the problem?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From me at mylife.com  Tue Mar 27 14:16:45 2007
From: me at mylife.com (Jason B)
Date: Tue, 27 Mar 2007 18:16:45 GMT
Subject: 16bit RGB with Image module
Message-ID: <hcdOh.9548$JZ3.7651@newssvr13.news.prodigy.net>

Hi all,

I'm still new to all of this, but I'm trying to do something here that 
*seems* like it should be pretty simple.  All I want to do is take an array 
of pixel data from a file (no header data or anything, just pixel data) in 
RGB565 format and save it off to a bitmap file - or display it, in the case 
below:

import sys, Image

if len(sys.argv) ==  2:
  print "\nReading: "+sys.argv[1]
  image_file = open(sys.argv[1], "rb")
  pixel_data = image_file.read()

im = Image.fromstring("RGB", (326, 325), pixel_data)
im.show()

When run, I get:

ValueError: not enough image data

Which I'm pretty sure is because it's expecting a 24bit image.  Of course if 
I tune down the width and height or change the format to B&W ("L") then it 
*does* display an image, the B&W one even having recognizable features, just 
not the right one.  :(

I've read through the documentation a thousand times trying to understand 
the raw decoder and plugins, etc. but I still can't figure this out...

Any help is greatly appreciated!

Thanks,
J 




From arkanes at gmail.com  Tue Mar  6 13:13:35 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 12:13:35 -0600
Subject: Project organization and import
In-Reply-To: <1173203395.649560.249930@p10g2000cwp.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
	<mailman.4723.1173201596.32031.python-list@python.org>
	<1173203395.649560.249930@p10g2000cwp.googlegroups.com>
Message-ID: <4866bea60703061013r7bea725fl4ba6ccc2fab792f7@mail.gmail.com>

On 6 Mar 2007 09:49:55 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 6, 9:19 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > You do? Or do you only have trouble because you don't like using "from
> > foo import Foo" because you need to do more work to reload such an
> > import?
>
> More work, like rewriting __import__ and reload??? :)
>
> There's a point where you should blame the language, not the
> programmer. Are you saying I'm lazy just because I don't want to mess
> with __import__?

You have to reload the importing module as well as the module that
changed. That doesn't require rewriting the import infrastructure.
It's only an issue because you're changing things at one level but
you're trying to use them at a level removed from that. I never work
that way, because I only have any need or desire to reload when I'm
working interactively and I when I'm doing that I work directly with
the modules I'm changing. The interfaces are what my unit tests are
for. If you're doing stuff complicated and intricate enough in the
interpreter that you need reload() to do very much more than its
doing, then you're working poorly - that sort of operation should be
in a file you can run and test automatically.

>
> > What makes you think that the exposed namespace has to be isomorphic
> > with the filesystem?
>
> I don't; you do!
>
> I was clearly talking about files and you assumed I was talking about
> namespace. That's Pythonic thinking... and I don't mean that in a good
> way!
>

All the files on the PYTHONPATH will map into the namespace. However,
you can have items in the namespace that do not map to files. The main
reasons to do so are related to deployment, not development though so
I wonder why you want to.

> > If you want to break a module into multiple packages and then stick
> > the files that make up the package in bizarre spots all over the
> > filesystem, can you give a reason why?
>
> Because I have written a project with 50,000 lines of Python and I'm
> trying to organize it in such a way that it'll scale up cleanly by
> another order of magnitude. Because I've worked on projects with
> millions of lines of code and I know about how such things are
> organized. It's funny, I'm a newbie to Python but it seems like I'm
> one of the only people here thinking about it as a large scale
> development language rather than a scripting language.
>

Thats not answering the question. Presumably you have some sort of
organization for your code in mind. What about that organization
doesn't work for Python? If you want multiple files to map to a single
module, make them a package.


From michael at jedimindworks.com  Fri Mar 30 15:09:29 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Fri, 30 Mar 2007 14:09:29 -0500
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
Message-ID: <588947CD-F526-49FF-92B7-826C0AB161CE@jedimindworks.com>


On Mar 30, 2007, at 10:38 AM, kevinliu23 wrote:

> I want to be able to insert a '-' character in front of all numeric
> values in a string. I want to insert the '-' character to use in
> conjunction with the getopt.getopt() function.
>
> Rigt now, I'm implementing a menu system where users will be able to
> select a set of options like "2a 3ab" which corresponds to menu
> choices. However, with getopt.getopt(), it'll only return what I want
> if I input -2a -3ab as my string. I don't want the user have to insert
> a '-' character in front of all their choices, so I was thinking of
> accepting the string input first, then adding in the '-' character
> myself.
>
> So my qusetion is, how do I change:
>
> "2a 3ab" into "-2a -3ab".
>

Will the first character always be a digit?

for i in yourstring.split():
	if i[0].isdigit():
		yourstring = yourstring.replace(i, '-%s' % (i,))

Or are these hex numbers?



From mnations at gmail.com  Sun Mar  4 22:52:56 2007
From: mnations at gmail.com (Mudcat)
Date: 4 Mar 2007 19:52:56 -0800
Subject: Python stock market analysis tools?
Message-ID: <1173066776.884126.86810@64g2000cwx.googlegroups.com>

I have done a bit of searching and can't seem to find a stock market
tool written in Python that is active. Anybody know of any? I'm trying
not to re-create the wheel here.



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 18:15:31 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 10:15:31 +1100
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<7xabywnugu.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>
	<7xtzx4i43e.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.03.23.15.30.246639@REMOVE.THIS.cybersource.com.au>

On Thu, 01 Mar 2007 21:53:09 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
>> > That still sounds like an unreliable manual type system, 
>> It's unreliable in the sense that the coder has to follow the naming
>> convention, and must have some bare minimum of sense. If your coders are
>> morons, no naming convention will save you. (For that matter, nothing will
>> save you.)
> 
> Well, type systems in programming languages have generally proven more
> reliable and easier to deal with than having programmers track it all
> manually-- that's why we don't all write in Forth ;-).

Apps Hungarian is NOT a type system.

Systems Hungarian is. It is pointless: an inefficient, manual nuisance
that redundantly does what the type system already does. Even Microsoft
agrees with that now.

Unless there is a type system that can automatically deal with the
semantic difference between (say) screen coordinates and window
coordinates, or between height and width, or safe and unsafe strings, the
coder still has to deal with it themselves.

And even if there is such a type system, Python isn't it.

[snip]
> You're right that this is not exactly dimensional analysis, but it still
> seems to call for types and conversion functions, rather than naming
> conventions.

The problem with types is that as far as the compiler is concerned, the
objects are the same type. Of course it needs conversion functions. 

Now maybe you could argue that what Microsoft needed was a different
language instead of C. Maybe so, but they were working with what they
had. Just as we're working with Python.

The point I'm trying to get across isn't that Apps Hungarian is the best
imaginable solution to the problem of dealing with semantically different
kinds of data. But it is an easy solution that works quite well (not
perfectly) and (unlike relying on Haskell's type system) it can be
applied to Python quite easily.



-- 
Steven.



From http  Sat Mar 17 14:58:38 2007
From: http (Paul Rubin)
Date: 17 Mar 2007 10:58:38 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<1174075514.144163.211660@o5g2000hsb.googlegroups.com>
	<1174154723.569760.256000@y66g2000hsf.googlegroups.com>
	<1174157021.427429.325030@y66g2000hsf.googlegroups.com>
Message-ID: <7xwt1fitnl.fsf@ruckus.brouhaha.com>

bearophileHUGS at lycos.com writes:
>     for x in e:
>         for y in r:
>             if -x-y in h:
>                 sch += h[-x-y]

I wonder whether

    g = h.get
    for x in e:
        for y in r:
            if -x-y in h:
                sch += g(-x-y, 0)

might be a little bit faster.  Also, -x-y could be saved in a variable.

It's unfortunate that array.array objects don't support the .sort()
operation.  It would be interesting to compare the sorting-based scheme
with the hashing-based one under psyco.  O(n**2*log(n)) local memory 
references might be faster than O(n**2) hash operations and random
lookups that almost always miss the cache.


From jeba_ride at yahoo.com  Sat Mar 10 14:49:05 2007
From: jeba_ride at yahoo.com (Clement)
Date: 10 Mar 2007 11:49:05 -0800
Subject: Help
Message-ID: <1173556145.150741.227160@n33g2000cwc.googlegroups.com>

how to use Python/C API ............



From kyosohma at gmail.com  Fri Mar 23 10:38:16 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 07:38:16 -0700
Subject: Exception passing
In-Reply-To: <pan.2007.03.23.14.29.34@gmail.com>
References: <pan.2007.03.23.14.29.34@gmail.com>
Message-ID: <1174660696.288857.33710@n76g2000hsh.googlegroups.com>

On Mar 23, 9:29 am, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> Hi, I have a function, which looks like the following:
>
> connecting = False
> def func ():
>     global connecting
>     connecting = True
>     try:
>        # Do lot of network stuff
>     except Exception, e:
>         connecting = False
>         raise e
>
> This works quite good, but it is a hell to debug. Instead of getting a
> log message to the line which originally raised the exception.
>
> Is there anyway to reraise an exception, but preserve the log?

You could import traceback and use its functionality.

Lundh mentioned using sys.exc_info about an hour ago to another user.
See http://effbot.org/pyref/sys.exc_info.htm

Mike



From paul at boddie.org.uk  Sun Mar  4 15:09:49 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Mar 2007 12:09:49 -0800
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
Message-ID: <1173038989.522947.196890@i80g2000cwc.googlegroups.com>

John Nagle wrote:
> I've been installing Python and its supporting packages on
> a dedicated server with Fedora Core 6 for about a day now.
> This is a standard dedicated rackmount server in a colocation
> facility, controlled via Plesk control panel, and turned over
> to me with Fedora Core 6 in an empty state.  This is the
> standard way you get a server in a colo today.

You have my commiserations, and I don't mean that to be a flippant
remark.

>    Bringing Python up in this completely clean environment is
> a huge hassle, and it doesn't really work.

Once upon a time, I used to manage an entire Python environment with
lots of modules, additional libraries, and so on. I don't have the
patience for that any more.

>    Fedora Core 6 ships with Python 2.4, which appears to be a
> good decision on someone's part.  Of course, there's no
> standard RPM for a Python 2.5 install on Linux.  Packaging is
> someone else's problem, according to the Python developers.

I managed to find a site which gives some kind of searchable index of
packages:

http://www.fedoratracker.org/

It's a bit like the Debian and Ubuntu package sites but seemingly
unofficial and a lot slower. Once upon a time there were some
contributed RPMs available from python.org, but I don't know what
happened to them.

[FTP server, GCC, configuration]

>     But "make install" does some compiles, something "install" probably
> shouldn't be doing.

If the original build process didn't manage to compile everything,
make will revisit that part of the process. What should really happen
is that make should halt and not try and do anything else.

An aside on the subject of installing - something you may be aware of,
but worth repeating for others who have read this far. I guess that
"make altinstall" isn't necessary if you *don't* do something like
this when configuring:

./configure --prefix=/usr

The issue here is that if Fedora (or other distributions) has things
relying on /usr/bin/python, you have to make sure that you don't
overwrite it when installing. If you've been thinking that the new
version of Python should live alongside the others, you have to use
"make altinstall" to preserve the existing python program (the
python2.4 will survive, anyway) whilst installing python2.5 alongside
it.

Typically, the configure script behaves as if this were typed:

./configure --prefix=/usr/local

Thus, a "make install" will create /usr/local/bin/python and /usr/
local/bin/python2.5, hopefully not overwriting other things.

>  Some of these compiles fail, with error messages
> like
> "/var/www/vhosts/sitetruth.com/private/downloads/python/Python-2.5/Modules/_curses_panel.c:271:
> error: "PyCursesPanelObject" has no member named "pan"

This should stop the process, but as you note...

> But the install script plunges blindly on, presumably installing a broken
> Python 2.5.  Apparently Fedora Core 6 doesn't come with "curses" preinstalled,
> but the Python installer assumes it is there.  What's inexcusable is
> just plowing on after failed compiles, resulting in a broken install.

This might require a bug report.

> It's probably necessary to install something before building Python,
> but the README file is silent on this.
>
>      OK.  Plunging onward, and not really needing the "curses" library,
> we try to install MySQLdb.  We get that with FTP,
> unpack it, go to the approprate directory, and run "python setup.py".
> This fails because the MySQL headers aren't installed:
>
> "_mysql.c:35:23: error: my_config.h: No such file or directory"
>
> OK, looks like we need to install "mysql-devel", so we do that,
> using "yum".   This forces an update of OpenSSL, Kerberos, and
> "e2fsprogs-dev".  Which means we should reboot at some point.

Perhaps the system wasn't up-to-date anyway.

> But now we can build MySQLdb.  So we build and install it.
>
> So then we try "import MySQLdb" in Python 2.5.  And we get this:
>
> > /usr/local/lib/python2.5/site-packages/MySQL_python-1.2.2-py2.5-linux-i686.egg/_mysql.py:3: UserWarning: Module _mysql was already imported from /usr/local/lib/python2.5/site-packages/MySQL_python-1.2.2-py2.5-linux-i686.egg/_mysql.pyc, but /var/www/vhosts/sitetruth.com/private/downloads/MySQLdb/MySQL-python-1.2.2 is being added to sys.path
> >   import sys, pkg_resources, imp
> > Traceback (most recent call last):
> >   File "<stdin>", line 1, in <module>
> >   File "MySQLdb/__init__.py", line 19, in <module>
> >     import _mysql
> >   File "build/bdist.linux-i686/egg/_mysql.py", line 7, in <module>
> >   File "build/bdist.linux-i686/egg/_mysql.py", line 4, in __bootstrap__
> >   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 800, in resource_filename
> >   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 1228, in get_resource_filename
> >   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 1250, in _extract_resource
> >   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 880, in get_cache_path
> >   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 846, in extraction_error
> > pkg_resources.ExtractionError: Can't extract file(s) to egg cache
> >
> > The following error occurred while trying to extract file(s) to the Python egg
> > cache:
> >
> >   [Errno 13] Permission denied: '/var/www/vhosts/sitetruth.com/.python-eggs'
> >
> > The Python egg cache directory is currently set to:
> >
> >   /var/www/vhosts/sitetruth.com/.python-eggs
> >
> > Perhaps your account does not have write access to this directory?  You can
> > change the cache directory by setting the PYTHON_EGG_CACHE environment
> > variable to point to an accessible directory.
>
> So what's going on?  We've run into a conflict between an assumption of Python
> and of the Plesk control panel.  Plesk doesn't let the user create files
> in their own home directory.  This installer assumes it can.  Oops.
> (Plesk sets up a very locked down environment, which is a good thing on
> a web server.)

This is probably a setuptools/easy_install FAQ. I only know this from
lurking on various mailing lists because I don't use setuptools/
easy_install.

> So, becoming the super-user, we create .python-eggs and change its ownership.
> Now we can import MySQLdb into Python.
>
> Now it turns out that we have Python 2.4 in /usr/bin, and Python 2.5
> in /usr/local/bin.  That's where the installer put it.  So the CGI
> scripts are invoking the wrong version of Python.  The scripts had to
> be changed.

That's possibly an environment issue, depending on what the first line
of the scripts are.

> At last, MySQLdb is connecting to MySQL properly.  However, the SSL module
> seems to be broken.  Tomorrow I'll deal with that, and try to get
> M2Crypto installed, always a tough job.
>
> This kind of nonsense is why hosting companies don't want to support Python.
> Perl and PHP may be dumb, but they just work.  Java has a company behind it.
> Python just isn't ready.  Which is embarassing, ten years on.

Do hosting companies support multiple versions of Perl or PHP in the
same environment? This isn't a provocative question, but I'd be
interested to know what they do.

> If the Python crowd wants market share, attention, and a career path,
> this has to be fixed.

Generally, if I were installing into a hosting environment - something
I may consider doing in the relatively near future - I'd firstly
choose a distribution I like working with (Debian-based, not Fedora)
and use the system packaging tools to their maximum extent. I'd even
create my own packages and repositories if necessary; I've done this
already for my own system. Managing dependencies, especially when you
get into dealing with lots of libraries from outside the Python
ecosystem, is a demanding task which can be sufficiently lightened if
you can make use of other people's packaging work.

Really, the "Python crowd" needs to involve the distribution makers
more, rather than (from time to time) calling them names, since most
installed versions of Python on non-Windows platforms are distributed
by those people to users, not obtained by users from python.org. One
exception may involve early adopters and the very latest Python
versions, however.

Paul



From gagsl-py2 at yahoo.com.ar  Sun Mar 18 21:52:32 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 Mar 2007 22:52:32 -0300
Subject: * operator--as in *args?
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
	<1174254032.155494.228530@e65g2000hsc.googlegroups.com>
	<1174266469.127020.186120@l77g2000hsb.googlegroups.com>
	<1hv6o86.18ve0cc11prsg8N%aleax@mac.com>
Message-ID: <op.tpex5u2ox6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 18 Mar 2007 22:21:41 -0300, Alex Martelli <aleax at mac.com> escribi?:

> 7stud <bbxx789_05ss at yahoo.com> wrote:
>
>> I played around with it a little bit, and it appears the * operator
>> unpacks a list, tuple, or dictionary so that each element of the
>> container gets assigned to a different parameter variable.  Although
>> with a dictionary, only the keys appear to be assigned to the
>> parameter variables, e.g.:
>>
>> def g(a,b,c):
>>         print a, b, c
>>
>> dict = {"x":10, "y":20, "z":30}
>> g(*dict)
>>
>> Is that right?
>
> As far as it goes, yes.  More generally, with any iterable x, the *x
> construct in function call will pass as positional arguments exactly
> those items which (e.g.) would be printed by the loop:
>     for item in x: print x
>
> [[this applies to iterators, generators, genexps, and any other iterable
> you may care to name -- not just lists, tuples, dicts, but also sets,
> files open for reading [the items are the lines], etc, etc]].

But the language reference says "sequence", not "iterable"  
(http://docs.python.org/ref/calls.html) and a dictionary is not a  
sequence. With Python 2.1 it was an error; it is not with 2.3 (I can't  
test with 2.2 right now)

Python 2.1.3 (#35, Apr  8 2002, 17:47:50) [MSC 32 bit (Intel)] on win32
Type "copyright", "credits" or "license" for more information.
>>> def f(*args, **kw):
...   print "args",args
...   print "kw",kw
...
>>> d = {"a":1, "b":2, "c":3}
>>> f(**d)
args ()
kw {'b': 2, 'c': 3, 'a': 1}
>>> f(*d)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: f() argument after * must be a sequence

If allowing f(*d) is actually the intended behavior, maybe the wording in  
the reference should be updated. If not, f(*d) should still raise an error.

-- 
Gabriel Genellina



From aleax at mac.com  Thu Mar 22 10:42:23 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 22 Mar 2007 07:42:23 -0700
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
	<mailman.5403.1174493865.32031.python-list@python.org>
	<etrpqf$t8g$3@gemini.csx.cam.ac.uk>
	<1hvchlx.13gg6ie17naf4oN%aleax@mac.com>
	<mailman.5440.1174552885.32031.python-list@python.org>
Message-ID: <1hvd9dq.dhkmc614vg15N%aleax@mac.com>

Steve Holden <steve at holdenweb.com> wrote:
   ...
> > a. fork
> > b. do the memory-hogging work in the child process
> > c. meanwhile the parent just waits
> > d. the child sends back to the parent the small results
> > e. the child terminates
> > f. the parent proceeds merrily
> > 
> > I learned this architectural-pattern a long, long time ago, around the
> > time when fork first got implemented via copy-on-write pages... 
> > 
> Yup, it's easier to be pragmatic and find the real solution to your 
> problem than it is to try and mould reality to your idea of what the 
> solution should be ...

"That's why all progress is due to the unreasonable man", hm?-)


Alex


From MonkeeSage at gmail.com  Mon Mar  5 21:51:21 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 18:51:21 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <7xk5xvgo55.fsf@ruckus.brouhaha.com>
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<7xk5xvgo55.fsf@ruckus.brouhaha.com>
Message-ID: <1173149481.694255.23350@n33g2000cwc.googlegroups.com>

On Mar 5, 7:24 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> This genexp is better than a loop because it bails out immediately
> if it finds an out-of-range x.

That's true: assuming that input is sequential. But if it's farily
random (e.g., [10, 20, 12, 46, 202, 5, 102]), then you need a loop/
list comp. to check each index.

Regards,
Jordan



From laurent.pointal at wanadoo.fr  Sat Mar 10 09:32:31 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 10 Mar 2007 15:32:31 +0100
Subject: UTF-8 output problems
References: <mailman.4882.1173489493.32031.python-list@python.org>
Message-ID: <45f2c077$0$5094$ba4acef3@news.orange.fr>

Michael B. Trausch wrote:

> I am having a slight problem with UTF-8 output with Python.  I have the
> following program:
> 
> x = 0
> 
> while x < 0x4000:
>     print u"This is Unicode code point %d (0x%x): %s" % (x, x,
> unichr(x))
>     x += 1
> 
> This program works perfectly when run directly:
> 
> mbt at pepper:~/tmp$ python test.py
> This is Unicode code point 0 (0x0):
> This is Unicode code point 1 (0x1):
> This is Unicode code point 2 (0x2):
> This is Unicode code point 3 (0x3):
> This is Unicode code point 4 (0x4):
> This is Unicode code point 5 (0x5):
> This is Unicode code point 6 (0x6):
> This is Unicode code point 7 (0x7):
> This is Unicode code point 8 (0x8):
> This is Unicode code point 9 (0x9):
> This is Unicode code point 10 (0xa):
> (... continued)
> 
> However, when I attempt to redirect the output to a file:
> 
> mbt at pepper:~/tmp$ python test.py >f
> Traceback (most recent call last):
>   File "test.py", line 6, in <module>
>     print u"This is Unicode code point %d (0x%x): %s" % (x, x,
> unichr(x))
> UnicodeEncodeError: 'ascii' codec can't encode character u'\x80' in
> position 39: ordinal not in range(128)
> 
> This is slightly confusing to me.  The output goes all the way to the
> end of the program when it is not redirected.  Why is Python treating
> the situation differently when the output is redirected?  This failure
> occurs for all redirection, by the way: >, >>, 1>2, pipes, and so forth.
> 
> Any ideas?

In complement to Marc reply, you can open a file with a specific encoding
(see codecs.open() function), and use print >> f,... to fill that file.

A+

Laurent.


From steven.bethard at gmail.com  Fri Mar 30 12:50:55 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 30 Mar 2007 10:50:55 -0600
Subject: Modules & positive surprises
In-Reply-To: <46091c7e$1@griseus.its.uu.se>
References: <46091c7e$1@griseus.its.uu.se>
Message-ID: <c8WdnX2y-bhxopDbnZ2dnUVZ_sHinZ2d@comcast.com>

Jan Danielsson wrote:
>    But then there are a few modules that I just love to use, because
> they are so "clean" from interface to function. Among them I can't help
> mentioning optparse.

<plug>
If you like optparse, you should try argparse:

     http://argparse.python-hosting.com/

It has an optparse-style API, along with support for

* positional arguments
* sub-commands
* required options
* options with a variable number of args
* better usage messages
* a much simpler extension mechanism

and more...
</plug>


STeVe


From paddy3118 at googlemail.com  Sun Mar 11 04:44:59 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 11 Mar 2007 00:44:59 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
Message-ID: <1173602699.255167.226250@8g2000cwh.googlegroups.com>

On Mar 9, 10:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> dbhbar... at googlemail.com <dbhbar... at googlemail.com> wrote:
> >  What if 2 new 'special' comment-like characters were added to Python?:
>
> >  1. The WIP (Work In Progress) comment:
>
> I use # FIXME for this purpose or /* FIXME */ in C etc.
>
> I have an emacs macro which shows it up in bright red / yellow text so
> it is easy to see and the company has a system which makes a web page
> with a list of all the FIXMEs on.
>
> FIXME is easy to grep for, language neutral and a lot of people use
> something similar (eg XXX or TODO).
>
> >  2. The HALT comment:
>
> You can so this with triple quotes.  ''' and ''' (if you normally use
> """ """ for docstrings)
>
> Python just ignores strings that lie around.
>
> --
> Nick Craig-Wood <n... at craig-wood.com> --http://www.craig-wood.com/nick

Vim will highlight the following comments too:
  #FIXME
  #TODO
  #XXX

- Paddy



From r1chardj0n3s at gmail.com  Thu Mar  1 12:58:35 2007
From: r1chardj0n3s at gmail.com (r1chardj0n3s at gmail.com)
Date: 1 Mar 2007 09:58:35 -0800
Subject: PyCon blogs?
In-Reply-To: <mailman.4480.1172622975.32031.python-list@python.org>
References: <mailman.4480.1172622975.32031.python-list@python.org>
Message-ID: <1172771915.765168.289370@v33g2000cwv.googlegroups.com>

On Feb 27, 6:36 pm, s... at pobox.com wrote:
> Was anybody blogging about PyCon (talks and/or sprints)?  Got any pointers?

Have you tried Planet Python?


    http://planet.python.org/



From nick at craig-wood.com  Tue Mar 27 04:30:05 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 27 Mar 2007 03:30:05 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
Message-ID: <slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>  so Diez is probably right that the way to go is to put the timer in the
>  python interpreter loop, as its the only thing around that you could 
>  more or less trust to run all the time.
> 
>  But then it will not read as nice as Nick's wish, but more like this:
> 
>  id = setup_callback(error_routine, timeout_in_milliseconds)
>  long_running_stuff_that_can_block_on_IO(foo, bar, baz)
>  cancel_callback(id)
>  print "Hooray it worked !! "
>  sys.exit()
> 
>  def error_routine():
>      print "toughies it took too long - your chocolate is toast"
>      attempt_at_recovery_or_explanation(foo, bar, baz)
> 
>  Much more ugly.

I could live with that!

It could be made to work I'm sure by getting the interpreter to check
for timeouts every few hundred bytecodes (like it does for thread
switching).

>  But would be useful to be able to do without messing with
>  threads and GUI and imports. 
>  Could be hard to implement as the interpreter would have 
>  to be assured of getting control back periodically, so a 
>  ticker interrupt routine is called for - begins to sound more 
>  like a kernel function to me.  
>  Isn't there something available that could be got at via ctypes?

I think if we aren't executing python bytecodes (ie are blocked in the
kernel or running in some C extension) then we shouldn't try to
interrupt.  It may be possible - under unix you'd send a signal -
which python would act upon next time it got control back to the
interpreter, but I don't think it would buy us anything except a whole
host of problems!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jeff at jmcneil.net  Wed Mar 28 16:04:48 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Wed, 28 Mar 2007 16:04:48 -0400
Subject: newbi question on python rpc server, how it works?
In-Reply-To: <gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>
References: <mailman.5720.1175107122.32031.python-list@python.org>
	<gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>
Message-ID: <82d28c40703281304w2e90b5deu315c60a78b9f106f@mail.gmail.com>

I've built a bit of an account provisioning/support framework here based on
SimpleXMLRPCServer (which is the one bundled w/ Python).  Take a look at
http://docs.python.org/lib/module-SimpleXMLRPCServer.html as it also
includes a bit of a code example.  It seems to work fine for my needs in
that I only server between 5 - 6 requests a minute.  All XML-RPC calls
translate into one or more LDAP calls. I've about ten clients connecting at
random times.

I've set it up to run on localhost:8080 and then I use
Apache+mod_ssl+htaccess+mod_proxy to provide some security.  Direct requests
are sent to https://user:password at rpc-server/RPC2 and proxied internally
back to the XMLRPC server.

Twisted might be an easier option though as you'll not have to deal with all
of the daemonization details.

Also, check out http://www.xmlrpc.com for protocol details.

Jeff

On 3/28/07, Larry Bates <lbates at websafe.com> wrote:
>
> krishnakant Mane wrote:
> > hello,
> > searched a lot of places including google search but can't find
> > answers to python-rpc.  I am also very new to rpc.  I am very clear
> > about its meaning and where it is to be used, but not about how it is
> > done.
> > I have a need where I need to create a layer of business logic that
> > will connect to mysql database at one end and a wxpython based thin
> > client at the other end.
> > can some one give me basic idea as to how I can use simple xml rpc
> > server class of python and build an xml rpc server and then a client
> > which I can embed in my wxpython based thin client?
> > as I said I am not aware of how xml rpc works in details.
> > I want to creat the wxpython client app in such a way that it only
> > does the work of validation and display and only sending the data as
> > is to the xml rpc server for logic and then xml rpc server will
> > inturn talk to mysql.
> > my business logic consists of many classes which I want to put in a
> > package directory with __init__.py and all the other modules.
> > do I need to create all of them as xml rpc server instances or can I
> > use them into one single xml rpc server class?
> > at the other end I am not really understanding how the xml rpc client
> > can be used to get data in to my wx based gui?
> > for example I want to fill up a list box with data that came from the
> > rpc server to the client and then some how looping through the
> > elements sent over and putting into a list.
> >
> > regards.
> > Krishnakant
>
> I'm no expert, but maybe I can get you started.
>
> If you understand how a SQL database works you can extend that knowledge
> to RPC.  You make queries to the RPC server and it returns responses.
> The format of the queries/responses is "normally" XML, but I'm pretty
> sure you could invent your own if you wanted to (probably a bad idea).
> Basically you define an API (like SQL queries define their API) that is
> used by the clients to make requests, update information, retrieve
> information, etc.
>
> You probably should take a look at Twisted module.  It does XMLRPC with
> just a few lines of code and also would scale well as you have many
> users talking to the server.  Download Twisted and take a look.  You
> might also want to pick up a copy of "Twisted Network Programming
> Essentials":
>
> http://www.oreilly.com/catalog/twistedadn/
>
> I'll bet it will be worth the purchase price if you choose to go this
> direction.
>
> -Larry Bates
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From mhellwig at xs4all.nl  Fri Mar  2 09:53:46 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Fri, 02 Mar 2007 15:53:46 +0100
Subject: How to update DNS record
In-Reply-To: <es7a73$ace$1@online.de>
References: <es5v6v$pv8$1@online.de> <45e71210$0$323$e4fe514c@news.xs4all.nl>
	<es7a73$ace$1@online.de>
Message-ID: <45e83a32$0$337$e4fe514c@news.xs4all.nl>

Andi Clemens wrote:
<cut>
> 
> It's working!!!
> Yeah!
> I don't know why I didn't get this the first time I tried dnspython, but now
> its working! And it's so easy, 3 lines of code:
> 
> def make_dns_entry(pix):
>      update = dns.update.Update(_DOMAIN)
>      update.replace(pix.name, 3600, 'a', pix.outbound)
>      response = dns.query.tcp(update, _NAMESERVER)
> 
> Thank you for all your help!
> 
> Andi

Glad to be of service!

-- 
mph


From fredrik at pythonware.com  Tue Mar 20 11:03:53 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 20 Mar 2007 16:03:53 +0100
Subject: class objects, method objects, function objects
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com><mailman.5281.1174315662.32031.python-list@python.org><1174324902.778062.104610@b75g2000hsg.googlegroups.com>
	<DvJLh.14450$tD2.8463@newsread1.news.pas.earthlink.net>
Message-ID: <etot4p$9kf$1@sea.gmane.org>

Dennis Lee Bieber wrote:

> "it(the" -- argument list, not the object -- ") is unpacked again

no, "it" refers to the bound method object, as 7stud would have realized if
he'd read the entire paragraph.  here's the relevant portion:

   /.../ a method object is created by packing (pointers to) the instance object
   and the function object just found together in an abstract object: this is the
   method object. When the method object is called with an argument list, it
   is unpacked again /.../

</F> 





From __peter__ at web.de  Wed Mar 28 03:34:51 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Mar 2007 09:34:51 +0200
Subject: Python automatic testing: mocking an imported module?
References: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
Message-ID: <eud5qn$et7$03$1@news.t-online.com>

Silfheed wrote:

> So we have the following situation: we have a testee.py that we want
> to automatically test out and verifiy that it is worthy of being
> deployed.  We want our tester.py to test the code for testee.py
> without changing the code for testee.py.  testee.py has a module in it
> that we want to mock in some tests and in others use the real module.
> 
> /foo.py:  (real module)
> class bar:
>    def __init__(self):
>         "I am real"
> 
> /foo_fake/foo.py: (fake module)
> class bar:
>    def ___init__(self):
>         "I am a banana"
> 
> /testee.py:
> import foo
> foo.bar()
> 
> /tester.py:
> from foo_fake import foo
>    foo.bar()    # prints I am a banana
>    testee.py  # also prints I am a banana
> import foo
>    foo.bar()   # prints I am real
>    testee.py # also prints I am real
> 
> 
> This isnt working as we would like, does anyone have any tips  on how
> to get something like this working?

You can put foo_fake.foo into sys.modules as foo:

import sys
from foo_fake import foo

assert "foo" not in sys.modules
sys.modules["foo"] = foo

foo.bar()    # prints I am a banana
import foo
foo.bar()    # prints I am a banana

Peter



From gagsl-py2 at yahoo.com.ar  Mon Mar 19 10:05:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 11:05:46 -0300
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
Message-ID: <op.tpfv3wt8x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 Mar 2007 05:35:00 -0300, momobear <wgwigw at gmail.com> escribi?:

>> > in C++ language we must initilized a variable first, so there is no
>> > such problem, but in python if we don't invoke a.boil(), we will not
>> > get self.temp to be initilized, any way to determine if it's initilzed
>> > before self.temp be used.
>
> sorry, I should add more code to implement my ideas.
> class coffee:
>          def __init__(self):
>               '''
>               do something here
>               '''
>          def  boil(self):
>                self.temp = 80
>
> a = coffer()
> if a.temp > 60:
>      print "it's boiled"

Apart from the other suggestions (ensure full initialization in __init__,  
using getattr, using hasattr) you may consider using a class attribute as  
a default value:

class Coffee:

     temp = 50

     def __init__(self):
         "do something"

     def  boil(self):
         self.temp = 80

a = Coffee()
print a.temp # 40
a.boil()
print a.temp # 80

-- 
Gabriel Genellina



From steven.bethard at gmail.com  Thu Mar 15 11:19:30 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 15 Mar 2007 09:19:30 -0600
Subject: Multiline code - trailing slash usage
In-Reply-To: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
Message-ID: <fbOdnTt1VJie-WTYnZ2dnUVZ_vninZ2d@comcast.com>

abcd wrote:
> When do I need to use a trailing slash to separate code over multiple
> lines.
> 
> For example:
> 
> x = "hello world, this is my multiline " + \
>      "string!!!!"

Yes.

> 
> x = {'name' : \
>       'bob'}

No.

You don't need trailing slashes whenever there's a pair of {}, [] or () 
wrapping things.

I never use trailing slashes -- I just wrap the expression in parentheses.

STeVe


From goodTweetieBird at hotmail.com  Tue Mar 20 13:55:54 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 20 Mar 2007 10:55:54 -0700
Subject: if __name__ == 'main':
In-Reply-To: <1174410796.599687.315730@b75g2000hsg.googlegroups.com>
References: <1174409383.842776.264350@b75g2000hsg.googlegroups.com>
	<1174410796.599687.315730@b75g2000hsg.googlegroups.com>
Message-ID: <1174413354.114320.19090@n59g2000hsh.googlegroups.com>

On Mar 20, 12:13 pm, "Patrick Down" <patrick.d... at gmail.com> wrote:
> On Mar 20, 11:49 am, "gtb" <goodTweetieB... at hotmail.com> wrote:
>
> > Hi,
>
> > I often see the following 'if' construct in python code. What does
> > this idiom accomplish? What happens if this is not main? How did I get
> > here if it is not main?
>
> A quick example demonstrates the usage:
>
> C:\code>type temp.py
>
> print "Module name is",__name__
>
> if __name__ == "__main__":
>     print "I was not imported"
> else:
>     print "I was imported"
>
> C:\code>python temp.py
> Module name is __main__
> I was not imported
>
> C:\code>python
> Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
> on win32
> Type "help", "copyright", "credits" or "license" for more information.>>> import temp
>
> Module name is temp
> I was imported


Thanks, all! Makes great sense.


Teas all 'round the canteen now,

gtb



From robin at reportlab.com  Fri Mar  2 12:49:45 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 02 Mar 2007 17:49:45 +0000
Subject: Sorting strings containing special characters (german 'Umlaute')
In-Reply-To: <54r2c4F21fssbU1@mid.individual.net>
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>	<hbf.20070302v8dv@bombur.uio.no>
	<54r2c4F21fssbU1@mid.individual.net>
Message-ID: <45E863B9.9020105@chamonix.reportlab.co.uk>

Bjoern Schliessmann wrote:
> Hallvard B Furuseth wrote:
>> DierkErdmann at mail.com writes:
.......
> 
> In German, there are some different forms:
> 
> - the classic sorting for e.g. word lists: umlauts and plain vowels
> are of same value (like you mentioned): ? = a
> 
> - name list sorting for e.g. phone books: umlauts have the same
> value as their substitutes (like Dierk described): ? = ae
> 
> There are others, too, but those are the most widely used.

Bj?rn, in one of our projects we are sorting in javascript in several languages 
English, German, Scandinavian languages, Japanese; from somewhere (I cannot 
actually remember) we got this sort spelling function for scandic languages

a
.replace(/\u00C4/g,'A~') //A umlaut
.replace(/\u00e4/g,'a~') //a umlaut
.replace(/\u00D6/g,'O~') //O umlaut
.replace(/\u00f6/g,'o~') //o umlaut
.replace(/\u00DC/g,'U~') //U umlaut
.replace(/\u00fc/g,'u~') //u umlaut
.replace(/\u00C5/g,'A~~') //A ring
.replace(/\u00e5/g,'a~~'); //a ring

does this actually make sense?
-- 
Robin Becker



From has.temp3 at virgin.net  Sun Mar 25 06:54:56 2007
From: has.temp3 at virgin.net (has)
Date: 25 Mar 2007 03:54:56 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174799509.212761.34380@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5571.1174789089.32031.python-list@python.org>
	<1174794013.752495.42220@o5g2000hsb.googlegroups.com>
	<1174794172.156941.107550@y66g2000hsf.googlegroups.com>
	<1hvhzvb.1qccr1i1ok96m7N%aleax@mac.com>
	<1174799509.212761.34380@n76g2000hsh.googlegroups.com>
Message-ID: <1174820096.012747.235450@n76g2000hsh.googlegroups.com>

On 25 Mar, 06:11, "7stud" <bbxx789_0... at yahoo.com> wrote:
> There it is.  I notice there is a directory: ..../Python.framework/
> Versions/2.3/Mac/Tools/IDE
> which has a bunch of files in it.  Do Macs have some kind of pre-
> installed Python IDE?  There's no read me file, so I can't tell what
> all the files are for.

That's the source for the old MacPython IDE which is now defunct. Just
ignore it.

Apple don't bundle a Python IDE in OS X. However, the Python 2.5
installer (http://www.python.org/ftp/python/2.5/python-2.5-macosx.dmg)
includes a copy of IDLE (not very Mac-like, unfortunately) and there
are various third-party editors available if you want to search
around.


has
--
http://appscript.sourceforge.net
http://rb-appscript.rubyforge.org
http://appscript.sourceforge.net/objc-appscript.html



From kyosohma at gmail.com  Mon Mar 26 14:58:28 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 11:58:28 -0700
Subject: wx.grid problem
In-Reply-To: <4607f550$0$5092$ba4acef3@news.orange.fr>
References: <4607e4f1$0$5098$ba4acef3@news.orange.fr>
	<1174925041.703904.151900@y80g2000hsf.googlegroups.com>
	<4607f550$0$5092$ba4acef3@news.orange.fr>
Message-ID: <1174935508.081326.113400@p77g2000hsh.googlegroups.com>

On Mar 26, 11:30 am, BH <B... at bh.com> wrote:
> Yes, absolutely, but try to minimize it, and the scrollbars stays hidden !!!
>
> kyoso... at gmail.com a ?crit :
>
> > On Mar 26, 10:20 am, BH <B... at bh.com> wrote:
> >> Hi !
>
> >> I have a small problem with wx.Grid and scrollbars.
> >> Scrollbars definitively dissapears after resizing the frame.
>
> >> Thx for help
>
> >> #----------------------------------------------------------------------
> >> import wx,wx.grid
> >> #----------------------------------------------------------------------
> >> class MainWindow(wx.Frame):
> >>       def __init__(self,parent,id,title):
> >>           wx.Frame.__init__(self,parent,wx.ID_ANY,title)
> >>           #--
> >>           self.grid= wx.grid.Grid(id=wx.ID_ANY,parent=self)
> >>           self.grid.CreateGrid(numRows=10,numCols=2)
> >>           self.grid.Fit()
> >>           self.Fit()
> >>           #--
> >>           self.Show(1)
> >> #----------------------------------------------------------------------
> >> app = wx.PySimpleApp()
> >> frame=MainWindow(None,-1,'Grid sizer')
> >> app.MainLoop()
> >> del app
>
> > If I understand this correctly, that is normal. Your grid is only two
> > columns by 10 rows, so if you resize your frame so that it shows all
> > rows and columns, the scroll bars will disappear, much like other
> > apps, such as FireFox. If you enlarge the frame enough, the scrollbars
> > go away.
>
> > Mike

The code you posted works for me. I am using Windows XP Pro, Python
2.4, wxPython 2.8. When I enlarge it, the scrollbars go away and when
I shrink it down, the scrollbars reappear. I tried using sizers, but
that seemed to cause problems.

I highly recommend that you post your questions about wxPython to the
wxPython users group. They have many talented and knowledgeable people
there. See http://wxpython.org/maillist.php

Mike



From martinunsal at gmail.com  Tue Mar  6 12:49:55 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 09:49:55 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4723.1173201596.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
	<mailman.4723.1173201596.32031.python-list@python.org>
Message-ID: <1173203395.649560.249930@p10g2000cwp.googlegroups.com>

On Mar 6, 9:19 am, "Chris Mellon" <arka... at gmail.com> wrote:
> You do? Or do you only have trouble because you don't like using "from
> foo import Foo" because you need to do more work to reload such an
> import?

More work, like rewriting __import__ and reload??? :)

There's a point where you should blame the language, not the
programmer. Are you saying I'm lazy just because I don't want to mess
with __import__?

> What makes you think that the exposed namespace has to be isomorphic
> with the filesystem?

I don't; you do!

I was clearly talking about files and you assumed I was talking about
namespace. That's Pythonic thinking... and I don't mean that in a good
way!

> If you want to break a module into multiple packages and then stick
> the files that make up the package in bizarre spots all over the
> filesystem, can you give a reason why?

Because I have written a project with 50,000 lines of Python and I'm
trying to organize it in such a way that it'll scale up cleanly by
another order of magnitude. Because I've worked on projects with
millions of lines of code and I know about how such things are
organized. It's funny, I'm a newbie to Python but it seems like I'm
one of the only people here thinking about it as a large scale
development language rather than a scripting language.

Martin



From MonkeeSage at gmail.com  Sun Mar 11 00:37:41 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 21:37:41 -0800
Subject: number generator
In-Reply-To: <pan.2007.03.11.05.26.15.551707@REMOVE.THIS.cybersource.com.au>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<1173575978.699090.313770@64g2000cwx.googlegroups.com>
	<pan.2007.03.11.05.26.15.551707@REMOVE.THIS.cybersource.com.au>
Message-ID: <1173591460.941709.316540@s48g2000cws.googlegroups.com>

On Mar 10, 11:26 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> To compare to the "cheat" method, calculate the mean and standard
> deviation of this sample, and compare to those from the other method.

I belieive you (mainly because I'm too lazy to write the sieve,
hehe). ;)

Regards,
Jordan



From seberino at spawar.navy.mil  Fri Mar  2 18:32:58 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 2 Mar 2007 15:32:58 -0800
Subject: How *extract* data from XHTML Transitional web pages? got
	xml.dom.minidom troubles..
Message-ID: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>

I'm trying to extract some data from an XHTML Transitional web page.

What is best way to do this?

xml.dom.minidom.parseString("text of web page") gives errors about it
not being well formed XML.

Do I just need to add something like <?xml ...?> or what?

Chris



From paddy3118 at googlemail.com  Thu Mar 22 02:52:47 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 21 Mar 2007 23:52:47 -0700
Subject: Wikipedia and a little piece of Python History
In-Reply-To: <tao8d4-uns.ln1@lairds.us>
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<871wjiuz5q.fsf@pobox.com>
	<1174508599.250404.176510@y66g2000hsf.googlegroups.com>
	<tao8d4-uns.ln1@lairds.us>
Message-ID: <1174546367.798807.83580@p15g2000hsd.googlegroups.com>

On Mar 21, 10:31 pm, cla... at lairds.us (Cameron Laird) wrote:
> In article <1174508599.250404.176... at y66g2000hsf.googlegroups.com>,
>
>
>
> Paddy <paddy3... at googlemail.com> wrote:
> >On Mar 21, 8:20 pm, j... at pobox.com (John J. Lee) wrote:
> >> "Paddy" <paddy3... at googlemail.com> writes:
> >> > I just had a link to Tim peters first post on doctest:
> >> >http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> >> > removed fromhttp://en.wikipedia.org/wiki/Doctestasit doesn't fit
> >> > their guidelines for external links.
> >> > I wonder, could maybe the official website be persuaded to host a copy
> >> > so that it could be linked to?
>
> >> > Tim, would you object?
>
> >> It (wikipedia) is a wiki, why not edit the page and paste it in?
>
> >> John
>
> >They have rules, and periodically trawl pages and clean them. I'd like
> >to stay within the rules.
>
> >- Paddy.
>
> Phaseit would be honored to memorialize a permanent URL for
> that post, or even the thread from which it's taken.  Is that
> an appropriate resolution, Paddy?

Thanks Cameron for the kind offer, but after Paul Ruben made me aware
that the initial edit was done by a rogue 'bot, I reverted the page to
its prior state.

Maybe, if you email Tim, he might welcome you adding his post to your
site anyway? - I think its wasted just being available as a newsgroup
search, and should at least be available somewhere on the official
Python website. Doctest is a great idea that is in harmony with the
language it is expressed in.

- Paddy.



From openopt at ukr.net  Mon Mar 19 16:13:55 2007
From: openopt at ukr.net (dmitrey)
Date: 19 Mar 2007 13:13:55 -0700
Subject: looking for a fastest parallel approach for quick executing of lots
	small routines
Message-ID: <1174335235.682491.300930@l75g2000hse.googlegroups.com>

hi all,
I'm looking for a way to execute a number (from 2 to thouzands,
usually small) of python functions as quikly as it's possible.

There seems to be lots of solutions, for example mentioned at
http://www.cimec.org.ar/python/ , but first of all it would be very
nice if the module is included into the scipy module or Python core,
for to minimize additional software dependences.
So what is the best choise? And if noone is included in Python
standard distribution - why it is so and is anything intended in
future Python versions: 2.6 or later?

Thank you in advance,
Dmitrey



From __peter__ at web.de  Fri Mar 23 03:30:32 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 Mar 2007 08:30:32 +0100
Subject: fine grain logging cotrol
References: <mailman.5451.1174567188.32031.python-list@python.org>
	<etu19j$nqi$03$1@news.t-online.com>
	<mailman.5464.1174579174.32031.python-list@python.org>
	<etuvoj$pqs$03$1@news.t-online.com>
Message-ID: <etvvij$7h3$01$1@news.t-online.com>

Eric S. Johansson wrote:

[in private mail -- please don't, Eric]

> Peter Otten wrote:
> 
> > As a general direction try to understand the logging package, the
> > __new__() method (a constructor in C++), and metaclasses (a class is
> > an instance of another class which is called metaclass to avoid
> > confusion when talking about both) independently before jumping into
> > the mix.
> 
> I've spent a big chunk of the afternoon/evening and am ok with
> metaclasses. ?but what has my knickers in a twist is the format
> statement. ?how do I get the logger to let me fill in funcName. ?I've
> tried what the docs say should work (but it doesn't)
> 
> self.__logger.info("Felis.alpha", funcName="hisss")

I don't understand. The logging package detects the function name without
user intervention. 

Perhaps it's time to step back and explain what you want to achieve rather
than how you proceed.

Peter


From steve at holdenweb.com  Mon Mar 19 23:25:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 23:25:28 -0400
Subject: difference between urllib2.urlopen and firefox view 'page source'?
In-Reply-To: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
References: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
Message-ID: <etnka9$pu3$1@sea.gmane.org>

cjl wrote:
> Hi.
> 
> I am trying to screen scrape some stock data from yahoo, so I am
> trying to use urllib2 to retrieve the html and beautiful soup for the
> parsing.
> 
> Maybe (most likely) I am doing something wrong, but when I use
> urllib2.urlopen to fetch a page, and when I view 'page source' of the
> exact same URL in firefox, I am seeing slight differences in the raw
> html.
> 
> Do I need to set a browser agent so yahoo thinks urllib2 is firefox?
> Is yahoo detecting that urllib2 doesn't process javascript, and
> passing different data?
> 
It's almost certainly a browser detection issue. This may not matter for 
your application.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From bbxx789_05ss at yahoo.com  Mon Mar 19 00:54:18 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 18 Mar 2007 21:54:18 -0700
Subject: class objects, method objects, function objects
In-Reply-To: <1174279490.889161.39300@y80g2000hsf.googlegroups.com>
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
	<1174279490.889161.39300@y80g2000hsf.googlegroups.com>
Message-ID: <1174280058.796282.261980@l77g2000hsb.googlegroups.com>

Darn.  I made some changes to the class and I didn't change the
function object.  It should be:

             |
             V
       function object
 ---------------------------------
|  def sayHi(self):               |
|       print "Hello " + self.name|
|_________________________________|




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  1 09:18:24 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 01 Mar 2007 15:18:24 +0100
Subject: How to update DNS record
References: <es5v6v$pv8$1@online.de><54nkvtF21ft8aU1@mid.individual.net>
	<1172751262.972242.215990@p10g2000cwp.googlegroups.com>
Message-ID: <54o5lgF21rhasU1@mid.individual.net>

andi.clemens at gmx.net wrote:

> It worked before with a perl script, but now I'm using django for
> all our web services so I want to implement this update function
> in Python as well.
> I don't know how to do this in Python, right now I'm trying it
> with twisted, but I don't what to do exactly. It would be nice if
> somebody has an example for doing this.

No one here knows how the server is configured or how the perl
script did it before, so there's little chance someone will have an
example that works for you.

Regards,


Bj?rn

-- 
BOFH excuse #280:

Traceroute says that there is a routing problem in the backbone. 
It's not our problem.



From paduffy at cisco.com  Fri Mar  2 13:51:26 2007
From: paduffy at cisco.com (Paul Duffy)
Date: Fri, 02 Mar 2007 13:51:26 -0500
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
In-Reply-To: <es9pvf$noj$02$1@news.t-online.com>
References: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
	<es9pvf$noj$02$1@news.t-online.com>
Message-ID: <45E8722E.4090509@cisco.com>

I am not using the universal newline.  File reading loop is essentially...

ifile = open("fileName", "r")
for line in ifile
  ...

Thanks

Peter Otten wrote:
> paduffy at cisco.com wrote:
>
>   
>> I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
>> Reading a file of 13 GBytes, one line at a time.  It appears that,
>> once the read line passes the 4 GByte boundary, I am getting
>> occasional random line concatenations.  Input file is confirmed good
>> via UltraEdit.  Groovy version of the same app runs fine.
>>
>> Any ideas?
>>     
>
> Do you open the file in  universal newline mode -- open(filename, "U") --,
> and if not, does the problem persist if you do?
>
> Peter
>   


From grflanagan at yahoo.co.uk  Fri Mar  9 06:14:18 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 9 Mar 2007 03:14:18 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <mailman.4850.1173438054.32031.python-list@python.org>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<1173426599.403173.49240@v33g2000cwv.googlegroups.com>
	<mailman.4845.1173430612.32031.python-list@python.org>
	<1173436219.937145.12550@64g2000cwx.googlegroups.com>
	<mailman.4850.1173438054.32031.python-list@python.org>
Message-ID: <1173438858.819893.268240@n33g2000cwc.googlegroups.com>

On Mar 9, 11:57 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 09 Mar 2007 07:30:20 -0300, Gerard Flanagan
> <grflana... at yahoo.co.uk> escribi?:
>
> >> There is a serious flaw on this approach, the function can't return any
> >> false value (it would be treated as a failure).
>
> > I was teaching myself decorators more than anything, so it's not
> > thought out to any extent, but even so I don't think it's a "serious
> > flaw", rather it would be programmer error to use @onfailFalse on a
> > function that may return False. Don't you think?
>
> I thought this was on response to the original problem, not for your own
> problem.
>

Mea culpa.

Gerard





From deepblue.ar at gmail.com  Sat Mar 10 14:28:42 2007
From: deepblue.ar at gmail.com (Deep)
Date: 10 Mar 2007 11:28:42 -0800
Subject: Formatted Input
Message-ID: <1173554922.454532.178280@n33g2000cwc.googlegroups.com>

Hi all,
I am a newbie to python
I have an input of form
<one number> space <another number>
ie.
4 3
how can i assign this to my variables??



From bj_666 at gmx.net  Thu Mar  1 03:40:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 01 Mar 2007 09:40:12 +0100
Subject: class declaration shortcut
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
Message-ID: <pan.2007.03.01.08.40.12.770567@gmx.net>

In <54msaoF21c6h3U3 at mid.individual.net>, Bjoern Schliessmann wrote:

> Bruno Desthuilliers wrote:
> 
>> class Toto(object):
>>      pass
>> 
>> print Toto.__name__
> 
> Okay, I revoke my statement and assert the opposite.
> 
> But what's it (__name__) good for?

As objects don't know to which name they are bound, that's a good way to
give some information in stack traces or when doing introspection.

Ciao,
	Marc 'BlackJack' Rintsch


From kyosohma at gmail.com  Tue Mar 27 09:47:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 06:47:09 -0700
Subject: Python Error :(
In-Reply-To: <1175001581.323552.37250@n59g2000hsh.googlegroups.com>
References: <1175001581.323552.37250@n59g2000hsh.googlegroups.com>
Message-ID: <1175003229.918435.179740@o5g2000hsb.googlegroups.com>

On Mar 27, 8:19 am, "Legend" <rahul... at gmail.com> wrote:
> I wasn't able to run a Python script. But then later I was able to run
> it through the Shell. I was experimenting with cron jobs and set up
> the python execution in as a cron. The first time it ran, It was fine
> but then after that, it started giving me some errors. Now when I try
> to run the script directly, I get the following error:
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "userbot.py", line 637, in ?
>     con = connect()
>   File "userbot.py", line 607, in connect
>     con.requestRoster()
>   File "user.py", line 531, in requestRoster
>     self.SendAndWaitForResponse(rost_iq)
>   File "user.py", line 326, in SendAndWaitForResponse
>     return self.waitForResponse(ID)
>   File "user.py", line 300, in waitForResponse
>     self.process(1)
>   File "xmlstream.py", line 459, in process
>     if not len(self.read()): # length of 0 means disconnect
>   File "xmlstream.py", line 398, in read
>     data_in=data_in+self._sslObj.read(BLOCK_SIZE).decode('utf-8')
> socket.sslerror: (6, 'TLS/SSL connection has been closed')
>
> Any help please?

I'll hazard a guess: Are you opening the socket explicitly when you
run this script?  If not, be sure to do so. And when you are finished
doing whatever it is you're doing, be sure to close it as well. You
may need to put in some kind of logic to check if the socket is still
open if you are transferring large files.

Mike



From rhamph at gmail.com  Tue Mar 13 01:39:25 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: 12 Mar 2007 22:39:25 -0700
Subject: threading and iterator crashing interpreter
In-Reply-To: <1173739629.570503.259110@30g2000cwc.googlegroups.com>
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
	<1173617253.901671.136910@q40g2000cwq.googlegroups.com>
	<mailman.4939.1173619757.32031.python-list@python.org>
	<1173623758.054666.18190@s48g2000cws.googlegroups.com>
	<1173730219.561059.165340@c51g2000cwc.googlegroups.com>
	<1173739629.570503.259110@30g2000cwc.googlegroups.com>
Message-ID: <1173764365.486438.288160@t69g2000cwt.googlegroups.com>

On Mar 12, 4:47 pm, "Klaas" <mike.kl... at gmail.com> wrote:
> On Mar 12, 1:10 pm, "Rhamphoryncus" <rha... at gmail.com> wrote:
>
> >http://sourceforge.net/tracker/index.php?func=detail&aid=1579370&grou...
>
> > That refers to a generator crash.  You are using generators, but also
> > getting a weird dict error.  Maybe related, maybe not.
>
> > I'll figure out if I've got a "fixed" version or not when I get back.

The bug report mentions 2.5.1, which hasn't be released yet, so
obviously I'm not using it. :)


> I was the one who filed the first bug.  login2 is definitely the same
> bug: you have a generator running in a thread, but the thread is being
> garbage collected before the generator's .close() method is run (which
> references the thread state).
>
> Try the patch I posted in the bug above; if it works, then python
> trunk/5.1maint should work.

And with a fresh checkout of trunk I still get a crash with login1.
login2 isn't crashing, although it's not as consistent for me anyway.



From python.technofreak at gmail.com  Mon Mar 26 08:42:30 2007
From: python.technofreak at gmail.com (Parthan SR)
Date: Mon, 26 Mar 2007 18:12:30 +0530
Subject: python on window
In-Reply-To: <1174910454.043983.171650@y80g2000hsf.googlegroups.com>
References: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
	<mailman.5507.1174641107.32031.python-list@python.org>
	<1174910454.043983.171650@y80g2000hsf.googlegroups.com>
Message-ID: <9d6d3deb0703260542q45aef2a2i569963e63092b8f9@mail.gmail.com>

On 26 Mar 2007 05:00:54 -0700, sandeep patil <san.gujar at gmail.com> wrote:
>
> i have written this program but i have gott following error,
> in anather proram "indentation error" sir how i will indent in my
> editor
>
> #test.py
> >>> def invert(table):
>         index=()
>         for key in table:
>                 value=table[key]
>                 if not index.has_key(value):
>                         index[value]=[]
>                         index[value].append(key)
>                 return index
>
>
> >>> phonebook = {'sandeep':9325, 'amit':9822, 'anand':9890, 'titu': 9325}
> >>> phonebook
> {'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
> >>> print phonebook
> {'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
> >>> inverted_phonebook = invert(phonebook)
>
> Traceback (most recent call last):
>   File "<pyshell#13>", line 1, in <module>
>     inverted_phonebook = invert(phonebook)
>   File "<pyshell#9>", line 5, in invert
>     if not index.has_key(value):
> AttributeError: 'tuple' object has no attribute 'has_key'
> >>> interted_phonebook= invert(phonebook)
>
> Traceback (most recent call last):
>   File "<pyshell#14>", line 1, in <module>
>     interted_phonebook= invert(phonebook)
>   File "<pyshell#9>", line 5, in invert
>     if not index.has_key(value):
> AttributeError: 'tuple' object has no attribute 'has_key'
> >>>



In your code, index = () means it is a tuple. IIRC, it should be a
dictionary. For that, index = {}. This is the one causing the following
error in your code,

  if not index.has_key(value):
AttributeError: 'tuple' object has no attribute 'has_key'

You can not use has_key over a tuple object.

But where is the "indentation error" ? I see nothing like that in the error
message.


-- 
With Regards

---
Parthan.S.R.
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From rob at jamDOTrr.com  Thu Mar  1 22:24:13 2007
From: rob at jamDOTrr.com (Rob Andrews)
Date: Thu, 01 Mar 2007 21:24:13 -0600
Subject: PyCon blogs?
In-Reply-To: <mailman.4480.1172622975.32031.python-list@python.org>
References: <mailman.4480.1172622975.32031.python-list@python.org>
Message-ID: <45e798ce$0$27057$4c368faf@roadrunner.com>

Now that I've half recovered from PyCon, I've uploaded some initial prattle:

http://trekkingbob.blogspot.com/2007/03/pycon-all-up-in-my-veins.html


From steve at REMOVEME.cybersource.com.au  Thu Mar  1 21:15:57 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 02 Mar 2007 13:15:57 +1100
Subject: class declaration shortcut
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
	<54nlkgF21ft8aU3@mid.individual.net>
Message-ID: <pan.2007.03.02.02.15.56.940730@REMOVEME.cybersource.com.au>

On Thu, 01 Mar 2007 10:44:48 +0100, Bjoern Schliessmann wrote:

> Mh. I suspect there's also more to it than I see now, but this
> __name__ seems quite useless to me. What if I rebind the class'
> name after definition? Or is it really just for some manual
> introspection? If it is, it seems a bit of an overkill to me.

Overkill? Storage of a single attribute holding a (usually short) string
is overkill?

The thing to remember is that the link between names and objects in
Python is one-way only. Names (by definition) have to know which object
they are bound to. But objects don't know what name, or names, (if any)
are bound to themselves. Yes, they *could* keep a list of the names bound
to them, but that would be a lot of work at runtime for little benefit.

So if you rebind a name, the objects can't tell. And generally you
wouldn't want them to. Something like the following is rightfully quite
rare:

>>> int
<type 'int'>
>>> int.__name__
'int'
>>> foo = int; int = "something else"
>>> type(0)    # Do you expect <type 'foo'>?
<type 'int'>
>>> int
'something else'

Normally the reason for rebinding classes, functions etc. are (1) to save
typing and (2) an optimization to save name look-ups. 

# slow way
for item in sequence:
    package.module.function(item)

# faster way
f = package.module.function
for item in sequence:
    f(item)

When you do that, you wouldn't expect the __name__ of some.module.function
to change to f, and it doesn't.

The downside is that on the rare corner case where you do want the
__name__ of an object to change, it doesn't.



-- 
Steven D'Aprano 



From anton.vredegoor at gmail.com  Thu Mar 22 13:07:01 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Thu, 22 Mar 2007 18:07:01 +0100
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <mailman.5460.1174570842.32031.python-list@python.org>
References: <mailman.5428.1174517933.32031.python-list@python.org>	<ettgei$rki$1@news2.zwoll1.ov.home.nl>	<mailman.5446.1174557039.32031.python-list@python.org>	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
Message-ID: <etui34$24l$1@news4.zwoll1.ov.home.nl>

skip at pobox.com wrote:

> I think the steady increase in the number of active listings over the
>  past couple years bodes well for the job prospects of Python 
> programmers as a whole.  There are currently 99 job postings on the 
> job board dating back to mid-December.  A year ago there were about 
> 60, a year before that, about 40.

Agreed. There's now probably even room on the job market for those who
don't belong to the select elite of early adopters. We might even root
out the professionalist attitude and address the problem of tying people
to their resumes.

> A number of those companies seem to be fairly enlightened about the 
> use of open source software (search for "open").  You can't expect 
> the world to completely change overnight.

If I never speak up there's little chance my ideas will get noticed.
But there's probably some better format possible for my message.

> Most companies probably still funnel external job postings through 
> their HR departments.  As a result, a certain amount of boilerplate 
> text and corporate puffery is bound to turn up in many postings. Be 
> thankful they at least found the job board or comp.lang.python and 
> aren't just trying to recruit through traditional channels.

Actually, I like people posting their jobs on an unmoderated forum. How
else would it be possible to try and get applicants and employers to
compare their ideas? I mean, not everyone is able to visit expensive
high-profile hiring fests like pycon.

> You'd probably never see job postings for the Space Telescope Science
>  Institute or The World Wide Workshop for Children's Media Technology
>  and Learning if they only appeared in the Washington Post or New
> York Times.

Sure. But my whole problem is that while I'd be immensely useful in a 
space telescope science institute or a genome database research 
institute or in an artists educational institute or in a psychological 
statistics institute or in a computer science or mathematics institute 
etc. there is no way people can see that, because they're thinking in 
resumes, job experience and formal education instead of in just asking 
themselves what needs to be done and can he do it. You know, like duck 
typing :-) From what I get around the 'net I gather the problem is a bit 
less pronounced in the US though.

A.


From gregpinero at gmail.com  Fri Mar  9 18:07:58 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 9 Mar 2007 15:07:58 -0800
Subject: How to Start a (thread?) and Leave
In-Reply-To: <mailman.4873.1173477492.32031.python-list@python.org>
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
	<1173472226.698504.147260@h3g2000cwc.googlegroups.com>
	<mailman.4873.1173477492.32031.python-list@python.org>
Message-ID: <1173481678.804795.219240@n33g2000cwc.googlegroups.com>

On Mar 9, 4:57 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> <gregpin... at gmail.com> wrote in message
>
> news:1173472226.698504.147260 at h3g2000cwc.googlegroups.com...
> | On Mar 9, 3:25 pm, "abcd" <codecr... at gmail.com> wrote:

> Can you tell the page to auto-refresh itself every 15 seconds or so?  I
> have seen this as a user but don't know if it is special html code or
> javascript or java or what.
>
> tjr

This will sort of emulate the stop button, that might work:
http://www.thescripts.com/forum/thread601992.html

-Greg



From nagle at animats.com  Wed Mar 14 20:18:47 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 15 Mar 2007 00:18:47 GMT
Subject: merits of Lisp vs Python
In-Reply-To: <87odmvinhf.fsf@pobox.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
	<1173581125.663707.5810@s48g2000cws.googlegroups.com>
	<87odmvinhf.fsf@pobox.com>
Message-ID: <Hh0Kh.3232$Qw.920@newssvr29.news.prodigy.net>

John J. Lee wrote:
> "Graham Dumpleton" <Graham.Dumpleton at gmail.com> writes:
> 
>>On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:

> Is it possible to ask mod_python to start separate processes to serve
> requests, rather than "separate" interpreters?  We couldn't see a way.

    That's what CGI does.

				John Nagle


From steven.potter at gmail.com  Sat Mar 17 15:39:47 2007
From: steven.potter at gmail.com (Steve  Potter)
Date: 17 Mar 2007 12:39:47 -0700
Subject: running python on xp command prompt
In-Reply-To: <1174158944.537266.120680@d57g2000hsg.googlegroups.com>
References: <1174158944.537266.120680@d57g2000hsg.googlegroups.com>
Message-ID: <1174160387.834202.163920@n59g2000hsh.googlegroups.com>

On Mar 17, 2:15 pm, TPh... at lbl.gov wrote:
> Hi,
>
> I have a simple question about running python on windows xp command
> prompt. The file is as follows and is named spam.py:
>
> print 2**8
> print 'the bright side' + 'of life'
> print "hello world"
>
> I run this on the command prompt as follows
>
> C:\Documents and Settings\User>python C:\Documents and Settings\User
> \Desktop\spa
> m.py
> python: can't open file 'C:\Documents': [Errno 2] No such file or
> directory
>
> and get the error above. If I surround the second directory in quotes
> like this
>
> C:\Documents and Settings\User>python "C:\Documents and Settings\User
> \Desktop\spa
> m.py"
>
> , there is no error. Does anyone know why this is.
>
> Thank you

It is because of the spaces in the path.  The command prompt assumes
that when it encounters a space that is the end of the attribute.  By
surrounding it in quotes you are indicating that it is all one
attribute.


Steve



From skip at pobox.com  Sat Mar 10 09:55:48 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 10 Mar 2007 08:55:48 -0600
Subject: pylint: don't warn about tabs
In-Reply-To: <7LnIh.327$mh7.197@trnddc04>
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4813.1173388535.32031.python-list@python.org>
	<G1mIh.25$qe5.19@trnddc05>
	<mailman.4877.1173484222.32031.python-list@python.org>
	<7LnIh.327$mh7.197@trnddc04>
Message-ID: <17906.50932.667513.269959@montanaro.dyndns.org>

    >> Finally, note this from PEP 666:

    Alan> I really think you should reread the PEP, which is making
    Alan> the opposite of your point.

Quite the opposite, in fact.  Laura Creighton wrote that PEP precisely with
the expectation (and hope) that Guido would reject it, which he did:

    PEP:                666
    Title:              Reject Foolish Indentation
    Version:            1083
    Last-Modified:      2001-12-12 00:40:09 +0100 (Wed, 12 Dec 2001)
    Author:             Laura Creighton <lac at strakt.com>
    Status:             Rejected
    Type:               Standards Track
    Created:            3-Dec-2001
    Python-Version:     2.2
    Post-History:       5-Dec-2001

Note the title and status.

Skip


From gnewsg at gmail.com  Mon Mar  5 09:21:34 2007
From: gnewsg at gmail.com (billiejoex)
Date: 5 Mar 2007 06:21:34 -0800
Subject: ANN: pyftpdlib 0.1 released
In-Reply-To: <Xns98EA90A109B37duncanbooth@127.0.0.1>
References: <1173102514.190879.7600@p10g2000cwp.googlegroups.com>
	<Xns98EA90A109B37duncanbooth@127.0.0.1>
Message-ID: <1173104494.751597.98150@p10g2000cwp.googlegroups.com>

On 5 Mar, 15:13, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> "billiejoex" <gne... at gmail.com> wrote:
> > Hi all,
> > I'm proud to announce the first beta release of pyftpdlib available at
> > the following urls:
>
> Announcing it once will do. Three times with minor edits is a bit much.

I'm sorry. I removed them by using google groups interface but maybe
with no success.



From whammett at nespower.com  Wed Mar  7 14:51:05 2007
From: whammett at nespower.com (Hammett, Wayne)
Date: Wed, 7 Mar 2007 13:51:05 -0600
Subject: Python 2.1 and Daylight saving time
In-Reply-To: <17903.5426.372813.378190@montanaro.dyndns.org>
Message-ID: <93D4B94043372746B559247AD6A3CC0F11CB06@bluepost.nes.nespower.nes>

Thanks for the quick reply.

Help me OB1,

I mainly needed to know if I could avert Daylight Saving Time issues by
upgrading to Python 2.5.

It appears that Python gets it UTC settings from a table in the C
library. Does this still hold true for Python 2.5. It looks that it will
fail to recognize the new DST 2007 changes.


Thanks again,

Wayne Hammett - MCSE
Snr. Network Engineer
1214 Church Street
Nashville,  TN  37246
(615) 747-3092
whammett at nespower.com
 

-----Original Message-----
From: skip at pobox.com [mailto:skip at pobox.com] 
Sent: Wednesday, March 07, 2007 1:41 PM
To: Hammett, Wayne
Cc: webmaster at python.org
Subject: Re: Python 2.1 and Daylight saving time


    Wayne> It appears that Python 2.1 is affected by the DST 2007 issue.
I
    Wayne> cannot really tell.

    Wayne> Can you point me to support documentation?

Wayne,

Python 2.1 is quite old and no longer supported.  The last 2.1 release
(2.1.3) was April 8, 2002.  The current release is Python 2.5.  That
said,
can you describe your problem clearly?  Do you have a simple script that
demonstrates the problem?  If so, it's possible that you can get some
help
from the folks on the python-list at python.org mailing list.  At the very
least people should be able to tell you if the problem you see exists in
later versions or if there's a bug in your script you can fix to avoid
the
problem.

-- 
Skip Montanaro - skip at pobox.com - http://www.webfast.com/~skip/
"The hippies and the hipsters did some great stuff in the sixties,
but the geeks pulled their weight too." -- Billy Bragg




From stj911 at rock.com  Wed Mar 14 14:38:48 2007
From: stj911 at rock.com (stj911 at rock.com)
Date: 14 Mar 2007 11:38:48 -0700
Subject: war with china? a different approach?
In-Reply-To: <1173654190.949881.5110@h3g2000cwc.googlegroups.com>
References: <45AC73E8.4010504@mustang.org>
	<1hs1e5i.1l5vmdx1ih79a7N%peter@DIESPAMMERDIE.dk>
	<45acf752.33126625@news-server.houston.rr.com>
	<2-OdnVZn--tUhzDYnZ2dnUVZ_q_inZ2d@bresnan.com>
	<1hs27ig.1y5o47s3rgkltN%peter@DIESPAMMERDIE.dk>
	<5158etF1j0n5aU3@mid.individual.net>
	<45ae2bf1.112133906@news-server.houston.rr.com>
	<1hs3c73.1yxa7c3q12khkN%peter@DIESPAMMERDIE.dk>
	<jgkeegan-3F565A.20305218012007@individual.net>
	<1hs61zt.1f267j04r1ur2N%peter@DIESPAMMERDIE.dk>
	<jgkeegan-59B29A.21505218012007@individual.net>
	<51av2lF1j1dp8U1@mid.individual.net>
	<jgkeegan-C9ACA6.05090819012007@individual.net>
	<Xns98BD610993FA4Sandman@216.196.97.136>
	<jgkeegan-1CFDBB.11465019012007@individual.net>
	<45b101c8.82683109@news-server.houston.rr.com>
	<1169235241.943262.161690@51g2000cwl.googlegroups.com>
	<1173654190.949881.5110@h3g2000cwc.googlegroups.com>
Message-ID: <1173897528.354755.36120@n76g2000hsh.googlegroups.com>

On Mar 11, 3:03 pm, rebeccag... at gmail.com wrote:
> Are you there, cause I don't want to waste my time writing a response
> to that if you're not there anymore. Please respond w/ a new post if
> you do check this.

A lot of us other than the OP would be interested in a good analysis,
if you have one



From gherron at islandtraining.com  Wed Mar 21 16:34:26 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Wed, 21 Mar 2007 13:34:26 -0700
Subject: Make variable global
In-Reply-To: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
References: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
Message-ID: <460196D2.80402@islandtraining.com>

abcd wrote:
> I have a file, "a.py"
>
> blah = None
> def go():
>     global blah
>     blah = 5
>
> >From the python interpreter I try....
>
>   
>>>> from a import *
>>>> blah
>>>> go()
>>>> blah
>>>>
>>>>         
>
> ...i was hoping to see "5" get printed out the second time I displayed
> blah, but it doesn't.  Now, if I type this same code directly into the
> python interpreter it works as i was hoping.  what i am missing?
>   
Since procedure go is defined in a.py, the global blah it refers to
is global to that module.

So import a (instead of importing * from a) and try this:
 >>> import a
 >>> a.blah
 >>> a.go()
 >>> a.blah
5
 >>>


Gary Herron



From greg at cosc.canterbury.ac.nz  Mon Mar 19 21:24:37 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 20 Mar 2007 13:24:37 +1200
Subject: XML based programming language
In-Reply-To: <567h7sF287idqU1@mid.uni-berlin.de>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
	<567h7sF287idqU1@mid.uni-berlin.de>
Message-ID: <568rj6F287c68U1@mid.individual.net>

Diez B. Roggisch wrote:

> What you are after then is the usage of a validating parser, not just
> well-formed XML-documents.
> 
> I'm not sure where element-tree stands regarding this, but I think 4suite
> offers DTD, W3C-Schema and Relax-NG support.

So he's effectively written his own validating parser, which
is a legitimate thing to do. His programming language likely
has constraints that can't be easily expressed using any of
the standard W3C buzzword-compliant validation mechanisms.

Also his validator has a chance to do other useful computation
along the way, such as semantic analysis and/or code generation.
That stuff has to be done anyway, and validation sort of comes
out of that for free. So inserting an extra validation step
might not be of any advantage.

--
Greg


From robert.kern at gmail.com  Tue Mar 13 22:06:59 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 13 Mar 2007 21:06:59 -0500
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>
Message-ID: <et7lc7$2tg$1@sea.gmane.org>

vj wrote:
> I've tried to post this to the numpy google group but it seems to be
> down.

It is just a redirection to the numpy-discussion at scipy.org list. If you just
tried in the past hour or so, I've discovered that our DNS appears to be down
right now.

> My migration seems to be going well. I currently have one issue
> with using scipy_base.insert.
> 
>>>> a = zeros(5)
>>>> mask = zeros(5)
>>>> mask[1] = 1
>>>> c = zeros(1)
>>>> c[0] = 100
>>>> numpy.insert(a, mask, c)
> array([ 100.,    0.,  100.,  100.,  100.,    0.,    0.,    0.,
> 0.,    0.])
>>>> a
> array([ 0.,  0.,  0.,  0.,  0.])
>>>> b
> array([0, 0, 0, 0, 0, 0, 0, 0, 0, 1], dtype=int8)
>>>> mask
> array([ 0.,  1.,  0.,  0.,  0.])
>>>> c
> array([ 100.])
> 
> I would have expected numpy.insert to update a so that the second
> element in a would be 100.

No, that's not what insert() does. See the docstring:

In [1]: from numpy import *

In [2]: insert?
Type:             function
Base Class:       <type 'function'>
Namespace:        Interactive
File:
/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy-1.0.2.dev3569-py2.5-macosx-10.3-fat.egg/numpy/lib/function_base.py
Definition:       insert(arr, obj, values, axis=None)
Docstring:
    Return a new array with values inserted along the given axis
    before the given indices

    If axis is None, then ravel the array first.

    The obj argument can be an integer, a slice, or a sequence of
    integers.

    Example:
    >>> a = array([[1,2,3],
    ...            [4,5,6],
    ...            [7,8,9]])

    >>> insert(a, [1,2], [[4],[5]], axis=0)
    array([[1, 2, 3],
           [4, 4, 4],
           [4, 5, 6],
           [5, 5, 5],
           [7, 8, 9]])


The behaviour that you seem to want would be accomplished with the following:

In [3]: a = zeros(5)

In [4]: mask = zeros(5, dtype=bool)

In [5]: mask[1] = True

In [6]: mask
Out[6]: array([False,  True, False, False, False], dtype=bool)

In [7]: a[mask] = 100

In [8]: a
Out[8]: array([   0.,  100.,    0.,    0.,    0.])


Note that the mask needs to be a bool array.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From sjmachin at lexicon.net  Thu Mar  1 11:28:32 2007
From: sjmachin at lexicon.net (John Machin)
Date: 1 Mar 2007 08:28:32 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <1172757183.819978.219440@v33g2000cwv.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
Message-ID: <1172766512.755494.215510@s48g2000cws.googlegroups.com>

On Mar 2, 12:53 am, "Bart Ogryczak" <B.Ogryc... at gmail.com> wrote:
>
> import struct
> buf = open('somefile','rb').read()
> count1 = lambda x: (x&1)+(x&2>0)+(x&4>0)+(x&8>0)+(x&16>0)+(x&32>0)+
> (x&64>0)+(x&128>0)
> byteOnes = map(count1,struct.unpack('B'*len(buf),buf))

byteOnes = map(count1,struct.unpack('%dB'%len(buf),buf))



From nagle at animats.com  Wed Mar  7 15:30:21 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 07 Mar 2007 20:30:21 GMT
Subject: More M2Crypto build problems
Message-ID: <xhFHh.5582$M65.3354@newssvr21.news.prodigy.net>

Trying to build M2Crypto on a dedicated server running Red Hat Fedora Core 6.
I'm trying to do this right, without manual patching.

The error message I'm getting during build is:

python setup.py build
...
swig -python -I/usr/include -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
/usr/include/openssl/opensslconf.h:27: Error: CPP #error ""This openssl-devel 
package does not work your architecture?"". Use the -cpperraswarn option to 
continue swig processing.
error: command 'swig' failed with exit status 1

We went through this before, but last time, the versions of OpenSSL and
of SWIG on the system were old, and I was running on a shared server
and couldn't update it.  Eventually, M2Crypto was hammered
into working, but it was ugly.  It was necessary to patch "setup.py" as
follows:

107,108d106
< target_cpu_str = '-D__i386__' # PATCH - assume Intel target. OpenSSL build 
needs this.
<
 > 116c114
<                      swig_opts = [swig_opts_str,target_cpu_str]
---
 >                      swig_opts = [swig_opts_str]

The problem is that the include file in OpenSSL assumes that some
system ID, like __i386__, is defined, which GCC does, but SWIG
does not. It might be considered a bug in SWIG.

This time, everything on the dedicated server has been updated with Yum,
so it ought to just work.

Yum says:
 >
 > Installed Packages
 > openssl.i686                             0.9.8a-5.4             installed
 > openssl-devel.i386                       0.9.8a-5.4             installed
 > python.i386                              2.4.3-9.FC5            installed
 > swig.i386                                1.3.31-0.fc5           installed
 > Available Packages
 > openssl.i386                             0.9.8a-5.4             updates

All of those are later than the ones required for M2Crypto, so the system
should be current.
 >
But it doesn't.

Also reported as a SWIG bug, as #1676049.

                    John Nagle


From ALEXURC at gmail.com  Thu Mar 29 11:45:24 2007
From: ALEXURC at gmail.com (ALEXURC at gmail.com)
Date: 29 Mar 2007 08:45:24 -0700
Subject: File deletion after 72 hours of creation
Message-ID: <1175183124.401829.41330@n76g2000hsh.googlegroups.com>

I'm looking for a simple method to delete a folder after 72 "Business
hours" (saturday/sunday doesnt count) since its creation. Note that
This is on a linux system and I realize that it will be the last
modified time. These files wont be modified since their creation.

Im very confused on how to work with the number easily.



From khemkaamit at gmail.com  Thu Mar 29 08:15:22 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Thu, 29 Mar 2007 17:45:22 +0530
Subject: Weird behavior in search in a list
In-Reply-To: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
Message-ID: <1360b7230703290515gf47028bjb82dce9e75466dec@mail.gmail.com>

On 29 Mar 2007 04:51:00 -0700, Su Y <suyuancn at gmail.com> wrote:
> hi all,
> I can't understand how this code work, its behavior is really weird
> for me...
>
> I want find the first number in extend[] which is larger than num, so
> I wrote:
> def find(num):
>     count=0
>     for elem in extend:
>         if elem<num:
>             count+=1
>     return count
>
> I found that if extend[] is monotonous, like [1.1, 2.3, 3.2, 4.5,
> 5.6],
> it works fine: find(4) returns 3, extend[3] is 4.5.
> But, if extend[] is not monotonous, like [1.1, 2.3, 3.2, 4.5, 5.6,
> 4.6, 3.4, 2.1, 0.3],
> find(4) returns 6, extend[6] is 3.4!
>
> what's going on here? I really can't understand....

Actually your function "find" returns the number of elements in list
extend, which are smaller than the argument. Perhaps you wanted to
'break' when once the condition is met.

 def find(num):
     count=0
     for elem in extend:
         if elem>num: break
         else: count+=1
     return count

Btw a concise way could be:
def getfirstbigger(num):
    for i,x in enumerate(extend):
        if x>num:    return i
    return len(extend)

HTH,


-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From godzillaismad at gmail.com  Thu Mar 22 08:36:46 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 22 Mar 2007 05:36:46 -0700
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <mailman.5449.1174564707.32031.python-list@python.org>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
	<mailman.5449.1174564707.32031.python-list@python.org>
Message-ID: <1174567006.244721.115890@n59g2000hsh.googlegroups.com>

On Mar 22, 10:56 pm, Steve Holden <s... at holdenweb.com> wrote:
> Godzilla wrote:
> > Dear all,
>
> > I cannot find a solution for my problem with inserting a blob object
> > (>4000 in length) into an ORACLE database via ODBC.
>
> > I have tried the two ways of inserting the blob object (a zip file):
>
> > 1)
> > fp = open("c:/test/test.zip", "r+b")
> > data = fp.read()
> > s = odbc.odbc(cs)
> > qry = s.cursor()
> > qry.execute("Insert into tBlob (data) values ('%s')" %
> > data.encode('hex'))
>
> > return the error: Input String Too Long Limit: 4096
>
> > 2)
> > qry.execute("Insert into tBlob (data) values (?)",
> > data.encode('hex'))
>
> > does not return error, but it does not insert the record correctly.
>
> > Any help will be fully appreciated...
>
> I would certainly recommend that you think about using the cxOracle
> package rather than relying on odbc. Most Orcale users do, with evident
> satisfaction.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com- Hide quoted text -
>
> - Show quoted text -

Thanks guys for all your help.

Steve, I think I've tried what you have suggested without any luck as
well... The statement works fine, but what inserted is not correct...
it seems like only the symbol '?' was inserted into the blob field...

I will try the suggested cxOracle library in place of odbc as a
trial... but I think since 95% of the code is using odbc, it would be
hard to convince the team to chance to the new library... anyway, I
will let you know how it goes.



From n.emami at gmail.com  Thu Mar  1 04:34:14 2007
From: n.emami at gmail.com (Nader)
Date: 1 Mar 2007 01:34:14 -0800
Subject: installing "pysqlite"
In-Reply-To: <1172663495.011225.76410@v33g2000cwv.googlegroups.com>
References: <9258d$45e3fa5d$9117fe9b$16503@news2.tudelft.nl>
	<1172576685.560386.306740@m58g2000cwm.googlegroups.com>
	<639dd$45e5625a$9117fe9b$1180@news1.tudelft.nl>
	<1172663495.011225.76410@v33g2000cwv.googlegroups.com>
Message-ID: <1172741654.589821.255220@v33g2000cwv.googlegroups.com>

On Feb 28, 12:51 pm, "Paul Boddie" <p... at boddie.org.uk> wrote:
> On 28 Feb, 12:07, Nader Emami <e... at knmi.nl> wrote:
>
>
>
> > I am back with another problem. I suppose that I can tell it!
> > I have installed both, 'sqlite' and 'pysqlite' without any problem. But
> > If I try to test whether the 'pysqlite' interface works, I get the next
> > error message:
>
> [...]
>
> > /usr/people/emami/lib/python2.4/site-packages/pysqlite2/_sqlite.so:
> > undefined symbol: sqlite3_set_authorizer
>
> > I don't understand it. Could you tell me how I can solve this last
> > point? I hope so!
>
> It looks like Python (although it's really the dynamic linker) can't
> locate the SQLite libraries. If you have installed SQLite into a non-
> standard place, which I'm guessing is the case, then you will need to
> set your LD_LIBRARY_PATH environment variable to refer to the
> directory where the libraries were installed.
>
> So, if you installed SQLite into /usr/people/emami and you see files
> like libsqlite3.so in /usr/people/emami/lib, then you need to change
> your LD_LIBRARY_PATH as follows:
>
> export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/people/emami/lib
>
> (The actual directory should be the same as the one you specified for
> library_dirs in the setup.cfg file for pysqlite.)
>
> If you're not using bash as your shell, the syntax for the command may
> be different. Don't forget to add this command to your shell
> configuration file (eg. .bashrc) so that your system remembers this
> information.
>
> Paul

Hello

I have expanded the LD_LIBRARY_PATH to my home lib (export
LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/people/emami/lib).
I have built and installed the 'pysqlite-2.3.3' with the next
'setup.cfg' :

[build_ext]
define=
include_dirs=/usr/people/emami/include
library_dirs=/usr/people/emami/lib
#libraries=/usr/people/emami/lib/libsqlite3.so  (this line as a
comment)

The resutl of this process was:

running install_lib
copying build/lib.linux-i686-2.4/pysqlite2/_sqlite.so -> /usr/people/
emami/lib/python2.4/site-packages/pysqlite2
running install_data

This message had given after installing. I have controll the '/usr/
people/emami/lib/python2.4/site-packages/pysqlite2' whether the
'_sqlite.so' has copied there. Yes it has. Okay!
I go to python and I give the next command:
>>> from pysqlite import test

and Unfortunately I get the next error message:

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/people/emami/lib/python2.4/site-packages/pysqlite2/test/
__init__.py", line 25, in ?
    from pysqlite2.test import dbapi, types, userfunctions, factory,
transactions,\
  File "/usr/people/emami/lib/python2.4/site-packages/pysqlite2/test/
dbapi.py", line 26, in ?
    import pysqlite2.dbapi2 as sqlite
  File "/usr/people/emami/lib/python2.4/site-packages/pysqlite2/
dbapi2.py", line 27, in ?
    from pysqlite2._sqlite import *
ImportError: /usr/people/emami/lib/python2.4/site-packages/pysqlite2/
_sqlite.so: undefined symbol: sqlite3_set_authorizer

Do you know what option I have to give to if I want to use the
'easy_install" tool?
%easy_install pysqlite (with some optione with which it cab find the
installed 'libsqlite.so')

Nader



From __peter__ at web.de  Wed Mar 28 14:38:12 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Mar 2007 20:38:12 +0200
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
	<eue8hl$uds$02$1@news.t-online.com>
	<mailman.5719.1175104408.32031.python-list@python.org>
Message-ID: <euecmf$517$03$1@news.t-online.com>

Georg Brandl wrote:

> Peter Otten schrieb:

>> A guess: you may have mixed Unix ("\n") and Windows ("\r\n") newlines.
>> Try to ensure that every line ends with "\r\n".
> 
> That shouldn't be a problem since Python reads source files in universal
> newline mode.

Oops, I should have guessed /that/.

Peter


From deets at nospam.web.de  Sun Mar 18 11:48:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 Mar 2007 16:48:40 +0100
Subject: XML based programming language
In-Reply-To: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
Message-ID: <5655asF26decfU1@mid.uni-berlin.de>

stefaan schrieb:
> Hello,
> 
> I have recently had to deal with an XML-based
> programming language. (The programs are
> generated programmatically.)
> 
> XML leads to a "two-level" parsing problem: first
> parse the xml into tokens, then parse the tokens
> to grasp their meaning (based on the semantics
> of the programming language).
> 
> Basically, I used elementtree as a sophisticated "lexer" and wrote a
> recursive descent parser to perform the semantic analysis and
> interpretation.
> (It works great.)
> 
> But I keep wondering: do parser generator tools
> exist that I could have used instead of writing
> the recursive descent parser manually ?

You haven't written a recursive descent parser. At least not in the 
sense of the word.

A parser (recursive descent or otherwise) will take a string written in 
the language it accepts, and in the field of programming languages 
usually returns an abstract syntax tree. On which one works - for 
code-generation, interpretation, optimization.

What you wrote is usually called a reducer, the part that traverses the 
tree, rewriting it, transforming it for interpretation and whatnot.

I've been working with tools that use a XML-Schema or DTD and generate 
typed objects from it, that are capable of being deserialized from a 
XML-stream. The better of these tools generate visitors and/or matchers, 
which basically are objects that traverse the generated object tree in 
document order, via typed methods. Something like this (java pseudocode):

class Visitor {

    public visit(Object o) {
      if(o instanceof Expr) {
         visit((Expr)o);
      else if(o instanceof SubExpr) {
         visit((SubExpr)o);
      }

    public visit(Expr e) {
       for(SubExpr se : e.subExpressions) {
         visit(se);
       }
    }

    public visit(SubExpr e) {
       // not doing anything
    }

}


This visitor you can then subclass, for example to create an interpreter.

All of this is theoretically possible in python, too. Using multimethods 
one can create the dispatching, and so forth.

I'm just not too convinced that it really is worth the effort. A simple 
tag-name-based dispatching scheme, together with the really nice 
ElementTree-api suffices in my eyes. Then you could do something like this:


class Visitor(ojbect):

    def visit(self, node):
        descent = True
        if getattr(self, "visit_%s" % node.tag):
           descent = getattr(self, "visit_%s" % node.tag)(node)
        if descent:
           for child in node:
               self.visit(child)


Then for an element "expr" you could define

class Foo(Visitor):
    def visit_expr(self, node):
        ...


HTH,

Diez


From anita_group1 at yahoo.com  Thu Mar 22 13:52:36 2007
From: anita_group1 at yahoo.com (anita_group1)
Date: Thu, 22 Mar 2007 17:52:36 -0000
Subject: testing
Message-ID: <etufp4+coq2@eGroups.com>

This is a test.



From chris.lasher at gmail.com  Wed Mar 28 18:05:21 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 28 Mar 2007 15:05:21 -0700
Subject: PDB does not allow jumping to first statement?
In-Reply-To: <1175025037.464283.260680@e65g2000hsc.googlegroups.com>
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
	<1174989571.857680.318720@o5g2000hsb.googlegroups.com>
	<1175025037.464283.260680@e65g2000hsc.googlegroups.com>
Message-ID: <1175119521.753287.55740@o5g2000hsb.googlegroups.com>

I have submitted this as a bug via SourceForge:
<https://sourceforge.net/tracker/?
func=detail&atid=105470&aid=1689458&group_id=5470>
or if munged
<http://tinyurl.com/2nwxsf>

The Python folks would like a test case and/or a patch. This is well
beyond my ken as a humble Python user. Could anybody more
knowledgeable please contribute one or both? Duncan or Rocky, would
you be able to spare time and effort?

Chris



From steve at holdenweb.com  Thu Mar 22 14:49:50 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 14:49:50 -0400
Subject: Problem with time
In-Reply-To: <4602bc27$0$9709$426a74cc@news.free.fr>
References: <4602bc27$0$9709$426a74cc@news.free.fr>
Message-ID: <etuj72$pbc$1@sea.gmane.org>

ian wrote:
> Hi,
> 
> i have a problem with time in python.
> 
> 1) i got 2 values from mysql db (fields are "time" type)
> 2) python get it as "<type 'datetime.timedelta'>" (why timedelta???)

timedelta because a time doesn't represent a fixed point until it's 
associated with a date, I presume.

> 3) i need to compare 2 fields with actual time ... EG:
> if ArrOutputsAuto[i].TimeFrom >= GNow and ArrOutputsAuto[i].TimeTo <= GNow:
> 
> i need actual time, and 2 fields from DB in datetime.time type (correct me
> if i'm wrong) so i can do my test "if time>= ..."
> 
> I think i can grab time from DB in string and parse it in
> datetime.time(x,x,x) but its not very optimized
> 
> Any idea ?
>  
Presumably the datetime.timedelta object comes back from the database 
with days=0? In which case try something like

import time
import datetime

dbtd = <timedelta from database>
h, m, s = time.localtime()[3:6]
timenow = s + (60 * (m + 60 * h))

Then compare timenow with dbtd.seconds.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From valentina.marotto at gmail.com  Wed Mar 21 06:52:16 2007
From: valentina.marotto at gmail.com (Valentina Marotto)
Date: Wed, 21 Mar 2007 11:52:16 +0100
Subject: encoding characters
Message-ID: <b35f5c730703210352v3d01b10bs40ff213a3f862e9d@mail.gmail.com>

First: excuse me for my very little english!

I have a problem, in my scripts python, with the encoding characters type
???????????????

I use the twisted.web package.

The problem is about the insertion data into database.

one of errors is:

exceptions.UnicodeEncodeError: 'ascii' codec can't encode characters in
position 25-26: ordinal not in range(128)
 <http://baghera.crs4.it:8080/sources#tbend> help me!
Thanks
-------------- next part --------------
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From gagsl-py2 at yahoo.com.ar  Mon Mar 19 18:24:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 19:24:55 -0300
Subject: coverage.py problem
References: <1174337929.621691.307390@p15g2000hsd.googlegroups.com>
Message-ID: <op.tpgi7t1vx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 Mar 2007 17:58:49 -0300, Orin <savalon at ukr.net> escribi?:

> Hi,
> I have a problem in using coverage.py module in my project:
>
> ./cov -c
> Traceback (most recent call last):
> File "./cov", line 10, in ?
> coverage.the_coverage.command_line(sys.argv[1:])
>  File "/usr/lib/python2.4/site-packages/coverage.py", line 363, in
> command_line    self.collect()
>  File "/usr/lib/python2.4/site-packages/coverage.py", line 467, in
> collect
> for file in os.listdir(cache_dir):
> OSError: [Errno 2] No such file or directory: ''

It appears that cache_dir is an empty string (and shouldn't) - that's all  
I can say about that unknown module (to me).

-- 
Gabriel Genellina



From esj at harvee.org  Thu Mar 22 08:39:21 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Thu, 22 Mar 2007 08:39:21 -0400
Subject: fine grain logging cotrol
Message-ID: <etttdr$nhk$1@sea.gmane.org>

I need to to be able to conditionally log based on the method the log 
statement is in and one other factor like a log level.  in order to do 
so, I need to be able to automatically find out the name of the method 
and its class but I haven't found out how to do that yet.

for example,

class catus(Felis):
   def Siamese_cat( yowl, purr, demand_food):

     ...
     log("state of litter box %s"% litter_box.smell, level = 1)


If the table of methods logged contains "catus.Siamese_cat", then I 
would expect to see the output of the log statements in a log file.  If 
not then I wouldn't see anything in the log.

Has somebody done this already?  Is it even possible to do without 
manually adding the class and method information for every log statement?

a related question is using signals for reloading configurations etc.  I 
have to find any good examples of how to use signals to cause a 
long-running process to reload external data.  Any good pointers?


--- eric






From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  9 11:16:04 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 Mar 2007 17:16:04 +0100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
Message-ID: <55dfi4F23k04lU1@mid.individual.net>

cesco wrote:
> On Mar 9, 3:51 pm, Paul Rubin <http://phr... at NOSPAM.invalid>
>> "cesco" <fd.calabr... at gmail.com> writes:
>>> I have to generate a list of N random numbers (integer) whose
>>> sum is equal to M. If, for example, I have to generate 5 random
>>> numbers whose sum is 50 a possible solution could be [3, 11, 7,
>>> 22, 7]. Is there a simple pattern or function in Python to
>>> accomplish that?

Isn't at least one of those numbers depending on the others?

> Given two positive integers, N and M with N < M, I have to
> generate N positive integers such that sum(N)=M. No more
> constraints.

Then why must they be random? div and mod should do it.

Regards,


Bj?rn

-- 
BOFH excuse #220:

Someone thought The Big Red Button was a light switch.



From attn.steven.kuo at gmail.com  Fri Mar  2 00:53:35 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 1 Mar 2007 21:53:35 -0800
Subject: Matplotlib axes label
In-Reply-To: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>
References: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>
Message-ID: <1172814815.385543.180040@j27g2000cwj.googlegroups.com>

On Mar 1, 3:10 pm, "John Henry" <john106he... at hotmail.com> wrote:
> I've been asking this question at the matplotlib user list and never
> gotten an answer.  I am hoping that there are matplotlib users here
> that can help.
>
> My problem with matplotlib's way of handling axes label is illustrated
> by this example:
>
> http://www.scipy.org/Cookbook/Matplotlib/MulticoloredLine
>
> Notice that the y-axis goes from (-1.1, 1.1) but the first label is at
> -1.0.

(snipped)

> Is there a way to force the label to start at -1.1 instead of -1.0?
>
> Thanks,


You can try adjusting the labels and ticks
using matplotlib.ticker.

To the example you cited, one can add

from matplotlib.ticker import MultipleLocator, FormatStrFormatter

# ...

minorLocator = MultipleLocator(0.1)
minorFormattor = FormatStrFormatter('%0.1f')
ax.yaxis.set_minor_locator(minorLocator)
ax.yaxis.set_minor_formatter(minorFormattor)

show()

--
Hope this helps,
Steven



From nogradi at gmail.com  Thu Mar 29 09:15:27 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 29 Mar 2007 15:15:27 +0200
Subject: YouTube showing repr() of a tuple
In-Reply-To: <460b9f48$0$30100$4d3efbfe@news.sover.net>
References: <460b9f48$0$30100$4d3efbfe@news.sover.net>
Message-ID: <5f56302b0703290615la5456efo8d4a007653fa3e0c@mail.gmail.com>

> Thought this might amuse some of you:
>
> <http://youtube.com/results?search_query=korect+my+speling>
>
> I'd heard that YouTube uses Python, but it's fun to see proof of that,
> even if it comes in the form of a minor bug.


But their web frontend is (probably) in php:

http://youtube.com/results.php?search_query=korect+my+speling


From nagle at animats.com  Sun Mar  4 01:42:38 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 04 Mar 2007 06:42:38 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems again
Message-ID: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>

   I've been installing Python and its supporting packages on
a dedicated server with Fedora Core 6 for about a day now.
This is a standard dedicated rackmount server in a colocation
facility, controlled via Plesk control panel, and turned over
to me with Fedora Core 6 in an empty state.  This is the
standard way you get a server in a colo today.

   Bringing Python up in this completely clean environment is
a huge hassle, and it doesn't really work.

   Fedora Core 6 ships with Python 2.4, which appears to be a
good decision on someone's part.  Of course, there's no
standard RPM for a Python 2.5 install on Linux.  Packaging is
someone else's problem, according to the Python developers.
So it's necessary to build from source.  And the "python.org"
FTP server is down, so even getting the source onto a remote
server is a pain.  So I have to download it on another machine
and bring it over with FTP.

   Trying to install Python 2.5 yields at least the following problems:

   Fedora Core 6 comes with GCC 4.1.1, but the README file
with Python 2.5 says this:

GCC 4.1,
GCC 4.2: There is a known incompatibility between Python and GCC,
          where GCC 4.1 and later uses an interpretation of C
          different to earlier GCC releases in an area where the C
          specification has undefined behaviour (namely, integer arithmetic
          involving -sys.maxint-1).

          As a consequence, compiling Python with GCC 4.1/4.2 is not
          recommended. It is likely that this problem will be resolved
          in future Python releases. As a work-around, it seems that
          adding -fwrapv to the compiler options restores the earlier
          GCC behaviour.

    OK, given that, presumably "./configure" takes care of that problem,
right?  Anybody know for sure?

    "make" runs fine after "./configure".

    But "make install" does some compiles, something "install" probably
shouldn't be doing.  Some of these compiles fail, with error messages
like 
"/var/www/vhosts/sitetruth.com/private/downloads/python/Python-2.5/Modules/_curses_panel.c:271: 
error: "PyCursesPanelObject" has no member named "pan"

But the install script plunges blindly on, presumably installing a broken
Python 2.5.  Apparently Fedora Core 6 doesn't come with "curses" preinstalled,
but the Python installer assumes it is there.  What's inexcusable is
just plowing on after failed compiles, resulting in a broken install.

It's probably necessary to install something before building Python,
but the README file is silent on this.

     OK.  Plunging onward, and not really needing the "curses" library,
we try to install MySQLdb.  We get that with FTP,
unpack it, go to the approprate directory, and run "python setup.py".
This fails because the MySQL headers aren't installed:

"_mysql.c:35:23: error: my_config.h: No such file or directory"

OK, looks like we need to install "mysql-devel", so we do that,
using "yum".   This forces an update of OpenSSL, Kerberos, and
"e2fsprogs-dev".  Which means we should reboot at some point.

But now we can build MySQLdb.  So we build and install it.

So then we try "import MySQLdb" in Python 2.5.  And we get this:

> /usr/local/lib/python2.5/site-packages/MySQL_python-1.2.2-py2.5-linux-i686.egg/_mysql.py:3: UserWarning: Module _mysql was already imported from /usr/local/lib/python2.5/site-packages/MySQL_python-1.2.2-py2.5-linux-i686.egg/_mysql.pyc, but /var/www/vhosts/sitetruth.com/private/downloads/MySQLdb/MySQL-python-1.2.2 is being added to sys.path
>   import sys, pkg_resources, imp
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "MySQLdb/__init__.py", line 19, in <module>
>     import _mysql
>   File "build/bdist.linux-i686/egg/_mysql.py", line 7, in <module>
>   File "build/bdist.linux-i686/egg/_mysql.py", line 4, in __bootstrap__
>   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 800, in resource_filename
>   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 1228, in get_resource_filename
>   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 1250, in _extract_resource
>   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 880, in get_cache_path
>   File "/usr/local/lib/python2.5/site-packages/setuptools-0.6c5-py2.5.egg/pkg_resources.py", line 846, in extraction_error
> pkg_resources.ExtractionError: Can't extract file(s) to egg cache
> 
> The following error occurred while trying to extract file(s) to the Python egg
> cache:
> 
>   [Errno 13] Permission denied: '/var/www/vhosts/sitetruth.com/.python-eggs'
> 
> The Python egg cache directory is currently set to:
> 
>   /var/www/vhosts/sitetruth.com/.python-eggs
> 
> Perhaps your account does not have write access to this directory?  You can
> change the cache directory by setting the PYTHON_EGG_CACHE environment
> variable to point to an accessible directory.

So what's going on?  We've run into a conflict between an assumption of Python 
and of the Plesk control panel.  Plesk doesn't let the user create files
in their own home directory.  This installer assumes it can.  Oops.
(Plesk sets up a very locked down environment, which is a good thing on
a web server.)

So, becoming the super-user, we create .python-eggs and change its ownership.
Now we can import MySQLdb into Python.

Now it turns out that we have Python 2.4 in /usr/bin, and Python 2.5
in /usr/local/bin.  That's where the installer put it.  So the CGI
scripts are invoking the wrong version of Python.  The scripts had to
be changed.

At last, MySQLdb is connecting to MySQL properly.  However, the SSL module
seems to be broken.  Tomorrow I'll deal with that, and try to get
M2Crypto installed, always a tough job.

This kind of nonsense is why hosting companies don't want to support Python.
Perl and PHP may be dumb, but they just work.  Java has a company behind it.
Python just isn't ready.  Which is embarassing, ten years on.

If the Python crowd wants market share, attention, and a career path,
this has to be fixed.

				John Nagle


From gagsl-py2 at yahoo.com.ar  Sun Mar 11 13:12:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 14:12:06 -0300
Subject: Parsing Indented Text (like parsing Python)
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<000a01c763c0$6863a560$2102fea9@Guides.local>
	<op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<008f01c763de$9a1a4190$0702a8c0@Guides.local>
	<mailman.4940.1173620244.32031.python-list@python.org>
	<1173629540.341906.319060@h3g2000cwc.googlegroups.com>
Message-ID: <op.to1beg0cx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 13:12:20 -0300, Paul McGuire <ptmcg at austin.rr.com>  
escribi?:

> On Mar 11, 8:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:

>> If you mix tabs+spaces, Python simple replaces each tab by 8 spaces.

> As I recall, the number of spaces to replace a tab by is something
> like 8-(col % 8) where col is the column location of the tab with the
> left most column being 0.

Yes, each tab advances to the next multiple-of-8 column. The problem is  
that "8" is fixed.

-- 
Gabriel Genellina



From lovelydiab at hotmail.com  Mon Mar  5 23:27:13 2007
From: lovelydiab at hotmail.com (lovelydiab at hotmail.com)
Date: 5 Mar 2007 20:27:13 -0800
Subject: Islam, the Religion of Ease
Message-ID: <1173155233.348048.220690@n33g2000cwc.googlegroups.com>

Excuse me!!
Would you stop for a moment?!
O...man...Haven't you thought-one day- about yourself ?
Who has made it?
Have you seen a design which hasn't a designer ?!
Have you seen a wonderful,delicate work without a worker ?!
It's you and the whole universe!..
Who has made them all ?!!
You know who ?.. It's "ALLAH",prise be to him.
Just think for a moment.
How are you going to be after death ?!
Can you believe that this exact system of the universe and all of
these great creation will end in in nothing...just after death!
Have you thought, for a second, How to save your soul from Allah's
punishment?!
Haven't you thought about what is the right religion?!
Read ... and think deeply before you answer..
It is religion of Islam.
It is the religion that Mohammad-peace upon him- the last prophet, had
been sent by.
It is the religion that the right Bible- which is not distorted-has
preached.
Just have a look at The Bible of (Bernaba).
Don't be emstional.
Be rational and judge..
Just look..listen...compare..and then judge and say your word.
We advise you visiting :
http://www.islam-guide.com
http://www.thetruereligion.org
http://www.beconvinced.com
http://www.plaintruth.org
http://english.islamway.com
http://www.todayislam.com
http://www.prophetmuhammed.org
http://www.islamtoday.net/english/
http://www.islamunveiled.org
http://www.islamic-knowledge.com



From ralf at schoenian-online.de  Thu Mar  8 23:35:32 2007
From: ralf at schoenian-online.de (=?ISO-8859-1?Q?Ralf_Sch=F6nian?=)
Date: Fri, 09 Mar 2007 05:35:32 +0100
Subject: Python books?
In-Reply-To: <mailman.4836.1173410475.32031.python-list@python.org>
References: <mailman.4836.1173410475.32031.python-list@python.org>
Message-ID: <45f0e403$1@news.arcor-ip.de>

Have a look at: Core python programming from Wesley J. Chun printed by 
Prentice Hall.

Ralf Schoenian


From zacherates at gmail.com  Mon Mar 19 21:49:02 2007
From: zacherates at gmail.com (zacherates)
Date: 19 Mar 2007 18:49:02 -0700
Subject: Passing arguments to a command line from a python script
In-Reply-To: <1174354958.815878.95020@d57g2000hsg.googlegroups.com>
References: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>
	<mailman.5313.1174350370.32031.python-list@python.org>
	<1174354958.815878.95020@d57g2000hsg.googlegroups.com>
Message-ID: <1174355342.669635.302960@y80g2000hsf.googlegroups.com>

On Mar 19, 9:42 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
> On Mar 19, 9:25 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Mon, 19 Mar 2007 20:46:56 -0300, Luis M. Gonz?lez <luis... at gmail.com>
> > escribi?:
>
> > > What I want now is execute the script I just created.
> > > As far as I know, the only way to execute the script is from a command
> > > line and typing "setup.py py2exe".
>
> > A few ways:
> > - os.system("commandline"). Simplest way, but you don't have much control,
> > and it blocks until the process finishes.
> > - os.popen[234]? or the functions in the popen2 module
> > - the subprocess module - the most complete way, but simple enough for
> > most cases.
>
> > --
> > Gabriel Genellina
>
> I'm sorry, but still I can't figure out this...
> Would you please show me a sample usage of os.system or os.popen for
> passing arguments to the command line?
> In this case, I should pass to the command line "setuppy py2exe".
>
> Thanks!
> Luis

aaron at athena:~$ python
Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> rt = os.system("ls")
apps       Firefox_wallpaper.png  s2        tux_sshot_0.ppm
xorg.conf.diff
Desktop    media                  s3        work
downloads  permutation.py         squeak    workspace
Examples   permutation.pyc        trackers  xorg.conf.aiglx
>>> rt
0
>>>

This implies that `os.system("setuppy py2exe")` should do what you
want.



From drfredkin at ucsd.edu  Sun Mar 11 14:59:55 2007
From: drfredkin at ucsd.edu (Donald Fredkin)
Date: Sun, 11 Mar 2007 18:59:55 GMT
Subject: any better code to initalize a list of lists?
References: <esqc9r$cn09$1@netnews.upenn.edu>
Message-ID: <LkYIh.2513$Qw.314@newssvr29.news.prodigy.net>

John wrote:

> For my code of radix sort, I need to initialize 256 buckets. My code
> looks a little clumsy:
> 
> radix=[[]]
> for i in range(255):
>    radix.append([])
> 
> any better code to initalize this list?

radix = [[[]]*256][0]

-- 



From george.sakkis at gmail.com  Mon Mar  5 22:26:33 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 5 Mar 2007 19:26:33 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
Message-ID: <1173151593.219310.122180@p10g2000cwp.googlegroups.com>

On Mar 5, 2:31 am, "Raymond Hettinger" <pyt... at rcn.com> wrote:

> I had an idea but no time to think it through.
> Perhaps the under-under name mangling trick
> can be replaced (in Py3.0) with a suitably designed decorator.
> Your challenge is to write the decorator.
> Any trick in the book (metaclasses, descriptors, etc) is fair game.
>
> Raymond
>
> -------- how we currently localize method access with name mangling
> ------
> class A:
>     def __m(self):
>         print 'A.__m'
>     def am(self):
>         self.__m()
>
> class B(A):
>     def __m(self):
>         print 'B.__m'
>     def bm(self):
>         self.__m()
>
> m = B()
> m.am()     # prints 'A.__m'
> m.bm()     # prints 'B.__m'
>
> -------- how I would like to localize method access with a decorator
> ------
> class A:
>     @localmethod
>     def m(self):
>         print 'A.m'
>     def am(self):
>         self.m()
>
> class B(A):
>     @localmethod
>     def m(self):
>         print 'B.m'
>     def bm(self):
>         self.m()
>
> m = B()
> m.am()     # prints 'A.m'
> m.bm()     # prints 'B.m'
>
> ---------------------
>
> P.S. Here's a link to the descriptor how-to:
>    http://users.rcn.com/python/download/Descriptor.htm

What would the semantics be if m is decorated as local only in A or
only in B ?

George



From fsck_spam at telenet.be  Sun Mar  4 10:03:35 2007
From: fsck_spam at telenet.be (Rikishi 42)
Date: Sun, 04 Mar 2007 16:03:35 +0100
Subject: transfer data from one machine to another
References: <1173013001.510046.42270@64g2000cwx.googlegroups.com>
Message-ID: <7n3rb4-6ir.ln1@whisper.very.softly>

On Sunday 04 March 2007 13:56, bahoo wrote:

> I have ssh access to two linux machines (both WITHOUT root account),
> and I'd like to copy data from one to another.
> Since the directory structure is different, I want to specify in a
> script (ideally in python, because that's what I want to learn) what
> to copy over like this:
> 
> source: /home/john/folderA
> destination: /home/smith/folderB
> 
> I'm a newbie on linux and ssh networking and python, so your
> suggestions are welcome! A small working example would be appreciated!

Try rsync, if you need a second run, it will only copy what has been
modified in the source.

rsync -var -e ssh /home/john/folderA name at computerB:/home/smith/folderB

Should be enough.
Remove 'v' for less verbose operation.

-- 
Research is what I'm doing, when I don't know what I'm doing.
(von Braun)



From http  Sun Mar 11 17:22:56 2007
From: http (Paul Rubin)
Date: 11 Mar 2007 13:22:56 -0800
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
	<Xns98F0AFA4DC7DAtim111one@216.196.97.136>
Message-ID: <7x3b4bv5jj.fsf@ruckus.brouhaha.com>

Tim Peters <tim.one at comcast.net> writes:
> 2.5 introduced a new front end and more ambitious constant-folding, and 
> I expect the bug showed up again due to one of those.

I hope it does get fixed.  Not having referential transparency in a
basic math function like atan2 is pretty disturbing in a modern
computer language.


From http  Tue Mar  6 03:57:43 2007
From: http (Paul Rubin)
Date: 06 Mar 2007 00:57:43 -0800
Subject: image processing
References: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>
Message-ID: <7xirdekauw.fsf@ruckus.brouhaha.com>

"edurand" <edurand.com at gmail.com> writes:
> You can use it in Python, and we have provided tutorials and samples
> in Python, with for exemple conversion from/to PIL image format.
> Have a look at : http://filters.sourceforge.net/

Looks interesting, however the example screen shot is shrunk down so
the text on it can't be read.  Also there are a bunch of sample
filters with example images, but no explanation at all of what the
filters do.  Finally, it keeps mentioning things like "dll" which
suggests this is a Windows library.  Is it?  Maybe it can be ported to
other OS's or maybe it's already multi-platform, but the web site
should make the situation clear either way.


From mikael at isy.liu.se  Tue Mar 13 12:59:39 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Tue, 13 Mar 2007 17:59:39 +0100
Subject: Communicating with a DLL under Linux
Message-ID: <45F6D87B.4070407@isy.liu.se>

I am interested in peoples experience with communicating with DLLs under 
Linux.

Situation:

I'm an electrical engineer that finds pleasure in using my soldering 
iron from time to time. I also find programming, preferably in Python, 
entertaining. I wouldn't call myself a programmer, though. Now, I may 
have found a hobby project that could give me the pleasure from both 
those worlds. There's this USB development gadget for sale in my 
favourite electronics store, and I sure would like to have something 
like that connected to my lab computer (a fairly new budget computer 
running Kubuntu 6.06).

The gadget costs about 50 Euros. It's not a lot of money, but I would 
not like to buy the thing if there is a substancial risk that I will not 
be able to make it work on that computer. From what I've read on the 
box, it assumes Windows (a number of versions), it includes a DLL to 
communicate with it, and example code in VB (iirc). For the interested, 
here's the gadget:

    http://www.elfa.se/elfa-bin/dyndok.pl?lang=en&vat=0&dok=9001.htm

I have been looking at ctypes, and from what I read, I should be able to 
communicate with a DLL by using ctypes. It even sounds fairly easy, as 
long as I know what the DLL is supposed to do. I expect there to be some 
kind of manual for the DLL included in the box. Are DLLs universal, or 
are there different DLLs for Windows and Linux (I'm not a programmer, 
remember)? If the vendor claims that the DLL is for Windows, is it 
reasonable to assume that it can be made to work under Linux, from 
Python, that is? Or is this perhaps completely out of the question?

So, who is willing share their experiences? Share advice? Is this as 
easy as it sounds to me? Any pitfalls around?

Regards
/MiO


From eurleif at ecritters.biz  Sat Mar 10 09:36:33 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Sat, 10 Mar 2007 09:36:33 -0500
Subject: UTF-8
In-Reply-To: <45f2bf21$0$5094$ba4acef3@news.orange.fr>
References: <mailman.4899.1173535209.32031.python-list@python.org>
	<45f2bf21$0$5094$ba4acef3@news.orange.fr>
Message-ID: <45f2c24c$0$8981$4d3efbfe@news.sover.net>

Laurent Pointal wrote:
> You should prefer to put 
>         # -*- coding: utf-8 -*- 
> at the begining of your sources files. With that you are ok with all Python
> installations, whatever be the defautl encoding.
> Hope this will become mandatory in a future Python version.

The default encoding specifies how Unicode strings are implicitly 
converted into byte strings. The code you gave specifies how Unicode 
string literals in a file are encoded, which is something completely 
different.


From kyosohma at gmail.com  Mon Mar 19 13:35:26 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 10:35:26 -0700
Subject: check if files are the same on Windows
In-Reply-To: <mailman.5286.1174323316.32031.python-list@python.org>
References: <1174320587.618875.48290@y66g2000hsf.googlegroups.com>
	<mailman.5286.1174323316.32031.python-list@python.org>
Message-ID: <1174325726.088461.10560@e65g2000hsc.googlegroups.com>

On Mar 19, 11:55 am, Shane Geiger <sgei... at ncee.net> wrote:
> In the unix world, 'fc' would be like diff.
>
> """
> Python example of checksumming files with the MD5 module.
>
> In Python 2.5, the hashlib module would be preferable/more elegant.
> """
>
> import md5
>
> import string, os
> r = lambda f: open(f, "r").read()
> def readfile(f,strip=False): return (strip and stripper(r(f))) or r(f)
> def writefile(f, data, perms=750): open(f, "w").write(data) and
> os.chmod(f, perms)
>
> def get_md5(fname):
>     hash = md5.new()
>     contents = readfile(fname)
>     hash.update(contents)
>     value = hash.digest()
>     return (fname, hash.hexdigest())
>
> import glob
>
> for f in glob.glob('*'):
>     print get_md5(f)
>
> > A crude way to check if two files are the same on Windows is to look
> > at the output of the "fc" function of cmd.exe, for example
>
> > def files_same(f1,f2):
> >     cmnd    = "fc " + f1 + " " + f2
> >     return ("no differences" in popen(cmnd).read())
>
> > This is needlessly slow, because one can stop comparing two files
> > after the first difference is detected. How should one check that
> > files are the same in Python? The files are plain text.
>
> --
> Shane Geiger
> IT Director
> National Council on Economic Education
> sgei... at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> Leading the Campaign for Economic and Financial Literacy
>
>  sgeiger.vcf
> 1KDownload

You can also use Python's file "read" method to read a block of each
file in a loop in binary mode.

Something like:

file1 = open(path1, 'rb')
file2 = open(path2, 'rb')

bytes1 = file1.read(blocksize)
bytes2 = file2.read(blocksize)

And then just compare bytes to see if there is a difference. If so,
break out of the loop. I saw this concept in the book: Python
Programming, 3rd Ed. by Lutz.

Have fun!

Mike



From n00m at narod.ru  Fri Mar 16 02:28:04 2007
From: n00m at narod.ru (n00m)
Date: 15 Mar 2007 23:28:04 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174024633.431427.236920@y66g2000hsf.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
Message-ID: <1174026484.499259.300720@o5g2000hsb.googlegroups.com>

Steve,
imo strangely enough but your suggestion to replace "if...: else:..."
with

     x_y = x + y
     h[x_y] = h.get(x_y, 1)

s=l=o=w=e=d the thing by ~1 sec.



From Marko.Cain.23 at gmail.com  Wed Mar 28 18:09:08 2007
From: Marko.Cain.23 at gmail.com (Marko.Cain.23 at gmail.com)
Date: 28 Mar 2007 15:09:08 -0700
Subject: How can I find out the size of a file
Message-ID: <1175119748.481117.107910@y80g2000hsf.googlegroups.com>

Hi,

How can I find out the size of a file in a disk in python?

i try this, but it does not work:
 size = open(inputFileNameDir + "/" + file, 'r').size()

Thank for any help.



From sickcodemonkey at gmail.com  Thu Mar  8 16:31:59 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Thu, 8 Mar 2007 16:31:59 -0500
Subject: What is the best way to upgrade python?
In-Reply-To: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
Message-ID: <2adc542f0703081331m478b388qe32150541e6b7243@mail.gmail.com>

Have you tried to upgrade the current python RPM?

rpm -Uvh ....

You can also build from source.  Once you get Python 2.4 up and running I am
pretty sure you can do a symbolic link on the python 2.3 application (either
in /usr/bin or /usr/sbin) and point it to the 2.4 python file.

On 8 Mar 2007 13:13:13 -0800, yinglcs at gmail.com <yinglcs at gmail.com> wrote:
>
> Hi,
>
> i am using red hat enterprise 4. It has python 2.3 installed. What is
> the best way to upgrade to python 2.4?
>
> I think one way is to compile python 2.4 from the source, but I can't
> remove the old one since when i do 'rpm -e python', i get error like
> 'failed dependencies'.
>
> Thank you for any idea.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From jstroud at mbi.ucla.edu  Sat Mar 24 16:45:13 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 24 Mar 2007 20:45:13 GMT
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174763412.409665.19870@l75g2000hse.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5555.1174759784.32031.python-list@python.org>
	<1174763412.409665.19870@l75g2000hse.googlegroups.com>
Message-ID: <t5gNh.18466$uo3.5749@newssvr14.news.prodigy.net>

7stud wrote:
> On Mar 24, 12:09 pm, "Greg Donald" <gdon... at gmail.com> wrote:
>> On 24 Mar 2007 10:30:28 -0700, Robert Hicks <sigz... at gmail.com> wrote:
>>
>>> I want to upgrade to 2.5 but I don't see any unistall instructions
>>> anywhere.
>> You're not required to remove the old version before installing the new version.
>>
>> Just install the new version somewhere like /usr/local and put
>> /usr/local/bin ahead of your other paths.
>>
>> --
>> Greg Donaldhttp://destiney.com/
> 
> Can you explain how that works?  If you install python in /usr/local,
> doesn't that leave you with something like /usr/local/python?  So what
> does putting usr/local/bin ahead of your other paths do?
> 

Don't build python for OS X unless you know you need to or want a 
learning experience. Rolling your own python is somewhat a can of worms 
for the uninitiated and it will be pretty tough beyond that to make it 
run as cleanly as the stock builds. (E.g. you will be asking about why 
readline doesn't work, etc.) This stuff is especially the case for OS X, 
which does things a little differently than linux.

Just download the 2.5 installer from python.org. Double click it and be 
done. A link to the new python will be created for you in 
/usr/local/bin. If you already had an earlier installed and the link 
didn't get updated, just replace the old one substituting 2.4 (or 2.3) 
with 2.5.

Then make sure /usr/local/bin comes before /usr/bin in your path and you 
will be set. See also my previous post about integrating ipython.

James


From russell.sayers at gmail.com  Tue Mar 20 21:45:16 2007
From: russell.sayers at gmail.com (russ)
Date: 20 Mar 2007 18:45:16 -0700
Subject: generating stats from stdout on a regular interval
Message-ID: <1174441516.876016.19360@y66g2000hsf.googlegroups.com>

Hi all,

Very new to Python - but excited to see what is possible - it sounds
very suitable for a project of mine I need a little help with.

I've got an executable which writes out data to stdout in a CSV sort
of format - I'd like to grab the data from stdout and create stats
from it at a regular interval, i.e. every 10 min.  Probably push the
stats out to a CSV file.

The popen2 module can read the stdout just like a file, and the csv
module can handle the reading / writing.  How do I go about
'processing' the stdout every 10 min?

Thanks,
Russ



From nogradi at gmail.com  Mon Mar 19 05:02:59 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Mon, 19 Mar 2007 10:02:59 +0100
Subject: Documentation for "str()" could use some adjustment.
In-Reply-To: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
Message-ID: <5f56302b0703190202m53793e3dpfd77d2f84134030d@mail.gmail.com>

> The Python documentation for "str" says
> "str([object]) :
>      Return a string containing a nicely printable representation of an
> object."
>
> However, there's no mention of the fact that "str" of a Unicode string
> with non-ASCII characters will raise a conversion exception.  The
> documentation (and several Python books) seem to indicate that "str" will
> produce some "printable representation" for anything, not raise an
> exception.
>
> I know, it was proposed in PEP 349 to change "str" to return Unicode
> strings, and that's coming someday, along with all-Unicode Python,
> but meanwhile, the documentation should be clear about this.

Hi John, I'm not at all an expert around here but my understanding of
the workflow is that bug reports should be submitted to the tracker at
sourceforge. There is no guarantee that they will be noticed there but
the chances there are much higher than for a message on the mailing
list. I just mention this because I've seen your mysqld, urllib and
other potentially important bug reports here with no action taken but
maybe submitting them to sourceforge would attract some developers.


From george.sakkis at gmail.com  Sat Mar 17 23:20:25 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 17 Mar 2007 20:20:25 -0700
Subject: Automagically log changes in table
In-Reply-To: <1174175976.156270.65830@e1g2000hsg.googlegroups.com>
References: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
	<1174175976.156270.65830@e1g2000hsg.googlegroups.com>
Message-ID: <1174188025.545923.272900@l77g2000hsb.googlegroups.com>

On Mar 17, 7:59 pm, "aspineux" <aspin... at gmail.com> wrote:

> Hi
>
> You can get this using "triggers" and "stored procedures".
> These are SQL engine dependent! This is available for long time with
> postgress and only from version 5 with mysql.
> This let you write SQL code (Procedure) that will be called when
> "trigged" by an event like inserting new row, updating rows,
> deleting ....

I'd rather avoid triggers since I may have to deal with Mysql 4. Apart
from that, how can a trigger know the current user ? This information
is part of the context (e.g. an http request), not stored persistently
somewhere. It should be doable at the framework/orm level but I'm
rather green on Turbogears/SQLAlchemy.

George



From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:59:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:59:55 -0300
Subject: import error
References: <BAY24-F8C0E318059EB1D9167F18A4700@phx.gbl>
Message-ID: <op.tpbvd5n1x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 16 Mar 2007 23:49:43 -0300, Nick Burns <theodoremouse at hotmail.com>  
escribi?:

> Quick question. I am running python on windows xp. i want to import my  
> own
> module "mymod". However, when I try to import it i get the error message  
> "ImportError:
> no module named mymod".
>
> "mymod" is located in a directory that is part of the computer's "path"  
> env
> variable. Imports fine if 'mymod' is in the current working directory,  
> but not
> otherwise. i had thought that by saving 'mymod'within my normal path  
> that it
> would import successfully, but this is not the case.

Python does not use the system PATH environment variable. Doing this:

import sys
print sys.path

you will see the list of directories that Python would try. Try saving  
your module inside site-packages.

-- 
Gabriel Genellina



From justin.mailinglists at gmail.com  Wed Mar 28 03:27:54 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 28 Mar 2007 00:27:54 -0700
Subject: wxPython, Syntax highlighting
In-Reply-To: <1175064996.150578.300170@l77g2000hsb.googlegroups.com>
References: <1175064996.150578.300170@l77g2000hsb.googlegroups.com>
Message-ID: <1175066874.691110.141220@n76g2000hsh.googlegroups.com>

On Mar 28, 2:56 pm, "Eric von Horst" <z80vsvi... at hotmail.com> wrote:

> I am looking for wx widget that has the ability to show text, edit the
> text (like a TextCtrl) but also does syntax highlighting (if the text
> is e.g. XML or HTML).
> I have been looking in the latest wxPython version but I could not
> really find anything.

see
.\wxPython2.6 Docs and Demos\samples\ide\ActiveGridIDE.py



From lbates at websafe.com  Wed Mar 14 15:27:10 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 14 Mar 2007 14:27:10 -0500
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <mailman.5106.1173899956.32031.python-list@python.org>
References: <45F843AD.6050509@gmx.net> <et9h7k$ehr$1@sea.gmane.org>
	<mailman.5106.1173899956.32031.python-list@python.org>
Message-ID: <45F84C8E.3020106@websafe.com>

Thomas Ploch wrote:
> Steve Holden schrieb:
>> Clearly if form['uploadfile'] is returning the client's path information 
>> you do have to remove that somehow before further processing, which also 
>> means you need to deduce what the client architecture is to correctly 
>> remove path data. Of course this also leaves open the question "what 
>> does a Mac client return?", and you might want to cater for that also.
> 
> I tested from linux and Mac OS, and on both os.path.basename() works as
> expected (since the server it runs on is a UNIX one). That brings me to
> the question, how Do I a) get the cients architecture and b) send the
> architecture of the client through cgi.FieldStorage()?
> 
>> I suspect you will also find that there are at least some circumstances 
>> under which a Unix browser will also include path information.
> 
> Which ones should that be? Since os.path.basename() _is_ doing the right
> thing on *nix style paths (Mac OS is not different there), I cant think
> of other circumstances.
> 
> 
>> I presume you are looking to use the same filename that the user 
>> provided on the client? Does this mean that each user's files are 
>> stored in different directories? Otherwise it's not always a good idea 
>> to use filenames provided by the user for files on the server anyway.
> 
> Yes, each User has his own directory. Files get timestamped and then put
> into the corresponding directory. It is just that having
> 'C:\a\very\long\path\file.ext' as a filename on the server is not nice.
> 
> Thomas
> 

You will need to write some Javascript and assign something to a hidden
field that gets posted.  Here is some Javascript to get you started:

http://www.javascripter.net/faq/operatin.htm

-Larry


From miki.tebeka at gmail.com  Wed Mar  7 14:26:27 2007
From: miki.tebeka at gmail.com (Miki)
Date: 7 Mar 2007 11:26:27 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
Message-ID: <1173295587.143018.102220@p10g2000cwp.googlegroups.com>

Hello Arnaud,

> Imagine I have three functions a(x), b(x), c(x) that each return
> something or raise an exception.  Imagine I want to define a function
> that returns a(x) if possible, otherwise b(x), otherwise c(x),
> otherwise raise CantDoIt.
Exceptions are for error handling, not flow control.

> Here are three ways I can think of doing it:
> ...

> # This one only works because a,b,c are functions
> # Moreover it seems like an abuse of a loop construct to me
> def rolled_first(x):
>     for f in a, b, c:
>         try:
>             return f(x)
>         except:
>             continue
>     raise CantDoIt
My vote is for that one.

> I don't feel happy with any of these.  Is there a more satisfying way
> of doing this in Python? What I would like is something like:
>
> ----------
> # This one isn't correct but looks the clearest to me
> def wished_first(x):
>     try:
>         return a(x)
>     except:
>         return b(x)
>     except:
>         return c(x)
>     except:
>         raise CantDoIt
Again, exception are for error handling, not for flow control.

As a side note, try to avoid "catch:", always catch explicit
exceptions.

HTH,
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From barnaclejive at gmail.com  Sat Mar 24 15:05:32 2007
From: barnaclejive at gmail.com (mkppk)
Date: 24 Mar 2007 12:05:32 -0700
Subject: Anyone know of a MICR parser algorithm written in Python?
Message-ID: <1174763132.786644.161500@y66g2000hsf.googlegroups.com>

MICR = The line of digits printed using magnetic ink at the bottom of
a check.

Does anyone know of a Python function that has been written to parse a
line of MICR data?
Or, some financial package that may contain such a thing?
Or, in general, where I should be looking when looking for a piece of
Python code that may have already been written by someone?

I'm working on a project that involves a check scanner the produces
the raw MICR line as text.

Now, that raw MICR needs to be parsed for the various pieces of info.
The problem with MICR is that there is no standard layout. There are
some general rules for item placement, but beyond that it is up to the
individual banks to define how they choose to position the
information.

I did find an old C program written by someone at IBM... But I've read
it and it is Not code that would nicely convert to Python (maybe its
all the Python I'm used to, be it seems very poorly written).

Here is the link to that C code: ftp://ftp.software.ibm.com/software/retail/poseng/4610/4610micr.zip

I've even tried using boost to generate a Python module, but that
didn't go well, and in the end is not going to be a solution for me
anyway.. really need access to the Python source.

Any help at all would be appreciated,

-mkp



From yb at icmail.net  Fri Mar 16 07:04:25 2007
From: yb at icmail.net (Yury)
Date: 16 Mar 2007 04:04:25 -0700
Subject: Writing python module in C: wchar_t or Py_UNICODE?
Message-ID: <1174043065.189483.123640@b75g2000hsg.googlegroups.com>

I am new to python and programming generally, but someday it is time
to start :)
I am writing a python module in C and have a question about multibyte
character strings in python<=>C.
I want a C function which takes a string as argument from python
script:

static PyObject *
connect_to_server(PyObject *self, PyObject * authinfo){
wchar_t * login;  /* Must support unicode */
char * serveraddr;
int * port;

if(!PyArgsParseTuple(authinfo, "sdu", &serveraddr, &port, &login))
return NULL;

...

Will that code work?
Or i should use Py_UNICODE * data type? Will it be compatible with
standard C string comparison/concantenation functions?



From mail at timgolden.me.uk  Mon Mar 26 04:41:33 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 26 Mar 2007 09:41:33 +0100
Subject: Create new processes over telnet in XP
In-Reply-To: <eu80h6$fno$1@news2.u-psud.fr>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>	<46043ad8$0$27402$ba4acef3@news.orange.fr>	<mailman.5531.1174684678.32031.python-list@python.org>
	<eu80h6$fno$1@news2.u-psud.fr>
Message-ID: <4607873D.5050107@timgolden.me.uk>

Laurent Pointal wrote:
> Shane Geiger a ?crit :
>> This reminds me of something I once wanted to do:  How can I install
>> Python in a totally non-gui way on Windows (without the use of VNC)?  I
>> think I was telnetted into a computer (or something like that) and I was
>> unable to run the usual Python installer because it uses a GUI.

While I don't remember if I've actually tried it you should
be able to do this with WMI. Example here...

   http://timgolden.me.uk/python/wmi_cookbook.html#install-a-product

If I have time to do it (and then undo whatever damage it
does ;) I'll give it a go later.

TJG


From daftspaniel at gmail.com  Tue Mar 13 17:44:26 2007
From: daftspaniel at gmail.com (daftspaniel at gmail.com)
Date: 13 Mar 2007 14:44:26 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173747288.760536.60020@j27g2000cwj.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
	<1173728423.775330.164470@t69g2000cwt.googlegroups.com>
	<1173731204.621260.192000@30g2000cwc.googlegroups.com>
	<1173747288.760536.60020@j27g2000cwj.googlegroups.com>
Message-ID: <1173822266.306935.199410@o5g2000hsb.googlegroups.com>

> The reason I want to do simulation but not just crawling is : we have
> to check many web pages' front page to see whether it conform to our
> visual standard, e.g, it should put a search box on the top part of
> the page. It's tedious for human work. So I want to 'crawl and save
> the visual presentation of the web site automatically', and check
> these image files later with human eyes.
>
> -Xiong

Hi Xiong,

I have been working on a program to do something very similar to
generate thumbnails of websites.

The code is in IronPython (which may put you off!) and would need
modified or scripted with pywinauto to deal with multiple images.

Let me know if it is of use to you and I will upload it.

Cheers,
Davy



From hg at nospam.org  Fri Mar  9 03:28:54 2007
From: hg at nospam.org (hg)
Date: Fri, 09 Mar 2007 09:28:54 +0100
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
	<slrnev2q3q.cis.mandus@oro.simula.no>
Message-ID: <d2fIh.4$iC.1@newsfe22.lga>

Mandus wrote:

> 8 Mar 2007 22:04:48 -0800 skrev bressert at gmail.com:
>> Hi Everyone,
>>
>> I'm considering about generating some Python Bindings for C++
>> libraries. What are considered the best tools for doing something like
>> this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.
> 
> We are doing this quite extensively at work, and have found that in the
> long run SWIG is the best solution. OMMV, but if you ask me, the answer
> is SWIG.
> 
> mvh,
> --
> Mandus - the only mandus around.

Hi,

Why do you think it is better than ctypes ?

Thanks,

hg



From gabriel.hase at gmail.com  Fri Mar 23 07:18:59 2007
From: gabriel.hase at gmail.com (killkolor)
Date: 23 Mar 2007 04:18:59 -0700
Subject: "finally" for unit test
Message-ID: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>

hi!

I have a unittest framework that tests a single function that in turn
works with files (takes input and outputs in the same file, no return
values).
In the unittest class I assign a member with all the names of my
testfiles and a testdirectory. The tests call the function (which
opens and writes to the file) and then opens the file to see if
everything is in order. The problem now is that after each testrun I
have to copy "fresh" files into the testdirectory, since of course the
function already run on all the files and made the changes. So I
implemented a buffering in the unittest functions: buffer the file,
call the function, make the test, write the buffered file back. This
works fine for unittests that do not fail. If a unittest fails though
the function stops and the writing back is never done. Is there
something like a finally for unittest functions? Or could I use
another approach to buffer and write back my files (for each unittest
function)?
thanks!
gabriel



From skip at pobox.com  Tue Mar 27 18:39:40 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 27 Mar 2007 17:39:40 -0500
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <euc3er$bif$1@sea.gmane.org>
References: <euc3er$bif$1@sea.gmane.org>
Message-ID: <17929.40236.560753.595621@montanaro.dyndns.org>


    Carl> Welcome to the PyPy 1.0 release...
    ...
    Carl> - A **Just-In-Time Compiler generator** able to **automatically**
    Carl>   enhance the low level versions of our Python interpreter,
    Carl>   leading to run-time machine code that runs algorithmic examples
    Carl>   at speeds typical of JITs!

Woo hoo!  Congratulations to all the PyPynistas!

Skip


From openopt at ukr.net  Mon Mar 19 16:17:09 2007
From: openopt at ukr.net (dmitrey)
Date: 19 Mar 2007 13:17:09 -0700
Subject: looking for a fastest parallel approach for quick executing of
	lots small routines
In-Reply-To: <1174335235.682491.300930@l75g2000hse.googlegroups.com>
References: <1174335235.682491.300930@l75g2000hse.googlegroups.com>
Message-ID: <1174335429.329776.153260@e1g2000hsg.googlegroups.com>

I forgot to add: first of all I need sinchronious parallel
calculations, not asinchronious
D.



From steven.bethard at gmail.com  Sat Mar 31 11:40:02 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 31 Mar 2007 09:40:02 -0600
Subject: Sorting a multidimensional array by multiple keys
In-Reply-To: <pan.2007.03.31.13.42.19@no.spam.plz>
References: <pan.2007.03.31.12.43.14@no.spam.plz>	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
	<pan.2007.03.31.13.42.19@no.spam.plz>
Message-ID: <2sydnas0Uf5SHZPbnZ2dnUVZ_tPinZ2d@comcast.com>

Rehceb Rotkiv wrote:
>> If you want a good answer you have to give me/us more details, and an
>> example too.
> 
> OK, here is some example data:
> 
> reaction is BUT by the
> sodium , BUT it is
> sea , BUT it is
> this manner BUT the dissolved
> pattern , BUT it is
> rapid , BUT it is
> 
> As each line consists of 5 words, I would break up the data into an array 
> of five-field-arrays (Would you use lists or tuples or a combination in 
> Python?). The word "BUT" would be in the middle, with two fields/words 
> left and two fields/words right of it. I then want to sort this list by
> 
> - field 3
> - field 4
> - field 1
> - field 0

You're probably looking for the key= argument to list.sort().  If your 
function simply returns the fields in the order above, I believe you get 
the right thing::

 >>> s = '''\
... reaction is BUT by the
... sodium , BUT it is
... sea , BUT it is
... this manner BUT the dissolved
... pattern , BUT it is
... rapid , BUT it is
... '''
 >>> word_lists = [line.split() for line in s.splitlines()]
 >>> def key(word_list):
...     return word_list[3], word_list[4], word_list[1], word_list[0]
...
 >>> word_lists.sort(key=key)
 >>> word_lists
[['reaction', 'is', 'BUT', 'by', 'the'],
  ['pattern', ',', 'BUT', 'it', 'is'],
  ['rapid', ',', 'BUT', 'it', 'is'],
  ['sea', ',', 'BUT', 'it', 'is'],
  ['sodium', ',', 'BUT', 'it', 'is'],
  ['this', 'manner', 'BUT', 'the', 'dissolved']]

STeVe


From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 24 23:40:33 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 13:40:33 +1000
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.22.59.05@mailinator.com>
Message-ID: <pan.2007.03.25.03.40.32.158357@REMOVE.THIS.cybersource.com.au>

On Sat, 24 Mar 2007 22:59:06 +0000, Mark wrote:

>> I timed it against running plain .py and running .pyc directly. It
>> seemed to be roughly on par with running .pyc directly, and about 18ms
>> faster than running .py. The file had 600 lines (21kb) of code.
> 
> So see my point at least? I'm still not sure why this approach is
> ill-favoured?

Because this is entirely a trivial saving. Who cares? Sheesh.

That's less than the natural variation in execution speed caused by (e.g.)
network events on your PC. I've just run the same do-nothing script (a
simple "pass") three times, and got times of 338ms, 67ms and 74ms. That's
a variation of 271 milliseconds between runs of the same script, and you
care about 18ms???

Saving 18ms on a script that takes 50ms to execute *might* be worthwhile,
if you're using that script in an automated system that executes it
thousands of times. If you're calling it by hand, come on now, you're not
even going to notice the difference! 50ms is close enough to instantaneous
that 32ms is not detectably faster to the human eye.

If you save 18ms one thousand times a day, you save a grand total of ...
eighteen seconds. Wow. Now you can spend more time with your family.

As of 2005, the world's fastest typist Barbara Blackburn has been clocked
at a peak of 212 words per minute for short bursts. Assuming an average of
five key strokes per word (including the space) that's about 18 key
presses per second, or 55 milliseconds per key press. A more realistic
figure for the average professional typist is about six key presses per
second, or 160 milliseconds per key press, and that's for pure
transposition (copying). If you've got to think carefully about what
you're typing, like sys admins do, the average time per key press is
significantly larger.

In other words, unless you can save AT LEAST 160 milliseconds, it isn't
worth typing even one more character. If you have to type one extra
character to save 18ms, you're actually 140ms worse off.

I can't believe the number of people who are spending this amount of time
worrying about such a trivial saving, and I can't believe that I've let
myself be suckered into this discussion. Don't you people have lives???



-- 
Steven
who has no life, which is why he is spending time complaining about people
who have no lives.



From tjreedy at udel.edu  Mon Mar 19 16:31:54 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 Mar 2007 16:31:54 -0400
Subject: Anything available that can read Microsoft .MDB files from Python?
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net><56863eF27p5bmU1@mid.uni-berlin.de><WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
	<1174334517.125928.274140@l75g2000hse.googlegroups.com>
Message-ID: <etmrvn$7fu$1@sea.gmane.org>


<kyosohma at gmail.com> wrote in message 
news:1174334517.125928.274140 at l75g2000hse.googlegroups.com...
| I've read .MDB files using ODBC. I don't know how big your files are,
| but I had a file with almost 3000 rows and I was able to fetch it in
| 1-2 seconds. If you want to give it whirl, you just need to create an
| ODBC connection and then do the following:

I'll just mention that OpenOffice.org Base can make ODBC connections and 
output in several formats.  Don't know if their ODBC works with .MDB.

tjr





From jm.suresh at gmail.com  Thu Mar  8 09:31:45 2007
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 8 Mar 2007 06:31:45 -0800
Subject: heapq.heappush and pop to use key
Message-ID: <1173364305.281085.271320@t69g2000cwt.googlegroups.com>

I wanted to have a heap of custom objects, and in different heaps I
wanted to have the weights for my elements differently. So, I modified
the heapq module to accept key arguments also.

The untested code is here. Please let me know if you find any bug or
if there is an easy way to do this.

-
Suresh
---------------------------------------------------------------------------------------------------------------------------------------------
__all__ = ['heappush', 'heappop', 'heapify', 'heapreplace',
'nlargest',
           'nsmallest']

from itertools import islice, repeat, count, imap, izip, tee
from operator import itemgetter
import bisect

pass_it = lambda x: x

def heappush(heap, item, key=pass_it):
    """Push item onto heap, maintaining the heap invariant."""
    heap.append(item)
    _siftdown(heap, 0, len(heap)-1, key=key)

def heappop(heap, key=pass_it):
    """Pop the smallest item off the heap, maintaining the heap
invariant."""
    lastelt = heap.pop()    # raises appropriate IndexError if heap is
empty
    if heap:
        returnitem = heap[0]
        heap[0] = lastelt
        _siftup(heap, 0, key)
    else:
        returnitem = lastelt
    return returnitem

def heapreplace(heap, item, key=pass_it):
    """Pop and return the current smallest value, and add the new
item.

    This is more efficient than heappop() followed by heappush(), and
can be
    more appropriate when using a fixed-size heap.  Note that the
value
    returned may be larger than item!  That constrains reasonable uses
of
    this routine unless written as part of a conditional replacement:

        if item > heap[0]:
            item = heapreplace(heap, item)
    """
    returnitem = heap[0]    # raises appropriate IndexError if heap is
empty
    heap[0] = item
    _siftup(heap, 0, key)
    return returnitem

def heapify(x, key=pass_it):
    """Transform list into a heap, in-place, in O(len(heap)) time."""
    n = len(x)
    # Transform bottom-up.  The largest index there's any point to
looking at
    # is the largest with a child index in-range, so must have 2*i + 1
< n,
    # or i < (n-1)/2.  If n is even = 2*j, this is (2*j-1)/2 = j-1/2
so
    # j-1 is the largest, which is n//2 - 1.  If n is odd = 2*j+1,
this is
    # (2*j+1-1)/2 = j so j-1 is the largest, and that's again n//2-1.
    for i in reversed(xrange(n//2)):
        _siftup(x, i, key)

# 'heap' is a heap at all indices >= startpos, except possibly for
pos.  pos
# is the index of a leaf with a possibly out-of-order value.  Restore
the
# heap invariant.
def _siftdown(heap, startpos, pos, key):
    newitem = heap[pos]
    # Follow the path to the root, moving parents down until finding a
place
    # newitem fits.
    while pos > startpos:
        parentpos = (pos - 1) >> 1
        parent = heap[parentpos]
        if key(parent) <= key(newitem):
            break
        heap[pos] = parent
        pos = parentpos
    heap[pos] = newitem


def _siftup(heap, pos, key):
    endpos = len(heap)
    startpos = pos
    newitem = heap[pos]
    # Bubble up the smaller child until hitting a leaf.
    childpos = 2*pos + 1    # leftmost child position
    while childpos < endpos:
        # Set childpos to index of smaller child.
        rightpos = childpos + 1
        if rightpos < endpos and key(heap[rightpos]) <=
key(heap[childpos]): # **CHANGED**
            childpos = rightpos
        # Move the smaller child up.
        heap[pos] = heap[childpos]
        pos = childpos
        childpos = 2*pos + 1
    # The leaf at pos is empty now.  Put newitem there, and bubble it
up
    # to its final resting place (by sifting its parents down).
    heap[pos] = newitem
    _siftdown(heap, startpos, pos, key)



From slawomir.nowaczyk.847 at student.lu.se  Wed Mar 14 08:07:57 2007
From: slawomir.nowaczyk.847 at student.lu.se (Slawomir Nowaczyk)
Date: Wed, 14 Mar 2007 13:07:57 +0100
Subject: execfile locks file forever if there are any syntax errors - is it
	python bug?
Message-ID: <20070314130014.A4F9.SLAWOMIR.NOWACZYK.847@student.lu.se>

Hello,

When I execfile a file which contains a syntax error, the file becomes
locked and stays this way all the way until I exit the interpreter (I am
unable to delete it, for example). I have tried but failed to find any
way to unlock the file... Is this a bug in Python?

Is there *any* way to unlock the file? It is annoying for me because I
often execfile various temporary files and it is a nuisance not to be
able to delete them.

I have tested with Python 2.5 on Windows... do other versions of Python
behave this way as well?

-- 
 Best wishes,
   Slawomir Nowaczyk
     ( Slawomir.Nowaczyk at cs.lth.se )

I didn't fight my way to the top of the food chain to be a vegetarian.



From deets at nospam.web.de  Sun Mar 18 07:45:30 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 Mar 2007 12:45:30 +0100
Subject: Automagically log changes in table
In-Reply-To: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
References: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
Message-ID: <564n2rF27ev4rU1@mid.uni-berlin.de>

George Sakkis schrieb:
> This is more in the context of Turbogears/SQLAlchemy, but if anyone
> has implemented something similar with other packages it might be
> useful to know.

SQLObject since version 0.8 lets you define event listeners for 
create/update/delete events on objects. You could hook into them.

Diez


From cfbolz at gmx.de  Thu Mar 29 13:10:31 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Thu, 29 Mar 2007 19:10:31 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <Xns9902840109A04duncanbooth@127.0.0.1>
References: <D78AD813-12F4-49D2-81B3-157681FEC6A4@stackless.com>	<mailman.5747.1175163481.32031.python-list@python.org>
	<Xns9902840109A04duncanbooth@127.0.0.1>
Message-ID: <460BF307.7010104@gmx.de>

Duncan Booth wrote:
> Robin Becker <robin at reportlab.com> wrote:
> 
>> I am hugely encouraged by this
>>
>> C:\Python\devel\pypy-1.0.0>\python24\python \python\lib\test
> \pystone.py
>> Pystone(1.1) time for 50000 passes = 1.49586
>> This machine benchmarks at 33425.6 pystones/second
>>
>> C:\Python\devel\pypy-1.0.0>.\pypy-c.exe \python\lib\test\pystone.py
>> Pystone(1.1) time for 50000 passes = 2.16123e-005
>> This machine benchmarks at 2.3135e+009 pystones/second
>>
>>
>> :) not
> 
> It looks like time.clock() is completely borked.

time.clock was indeed borked under windows (of by a factor of 1000). 
fixed in svn now.

Cheers,

Carl Friedrich



From rustybear at gmail.com  Sat Mar 31 17:25:12 2007
From: rustybear at gmail.com (rustybear at gmail.com)
Date: 31 Mar 2007 14:25:12 -0700
Subject: help with dates
Message-ID: <1175376312.927559.10380@n76g2000hsh.googlegroups.com>

[sorry about the earlier post. accidently hit enter]

I'm working on a website for some firefighters that want to be able to
sign-up for overtime and I need some help figuring out a date related
problem.

Here's the scenario:

Four groups of firefighters (group1, group2, group3, group4). Each
group works a 24 hr shift. So group1 works April 1, group2 works April
2, group3 works April 3, group4 works April 4, group 1 works April 5,
etc. It just keeps rolling like this forever into next year, etc.

I need to come up with a methodology for the following:

If given a date, find out what group is working on that date.

Has anyone dealt with a problem like this before?  Obviously I'll need
to have a starting date where group1 is associated with a starting
date. Fortunately there are no surprises. Groups work in order
(1,2,3,4,1,2,3,4,1,2,...) and dates go in order and there are
absolutely no special exceptions for holidays and anything else.

Thanks in advance for any clues.

Kevin



From NikitaTheSpider at gmail.com  Sun Mar  4 14:21:43 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Sun, 04 Mar 2007 14:21:43 -0500
Subject: How use XML parsing tools on this one specific URL?
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <NikitaTheSpider-9BE3EE.14214204032007@news-server.nc.rr.com>

In article <1173030156.276363.174250 at i80g2000cwc.googlegroups.com>,
 "seberino at spawar.navy.mil" <seberino at spawar.navy.mil> wrote:

> I understand that the web is full of ill-formed XHTML web pages but
> this is Microsoft:
> 
> http://moneycentral.msn.com/companyreport?Symbol=BBBY
> 
> I can't validate it and xml.minidom.dom.parseString won't work on it.
> 
> If this was just some teenager's web site I'd move on.  Is there any
> hope avoiding regular expression hacks to extract the data from this
> page?

Valid XHTML is scarcer than hen's teeth. Luckily, someone else has 
already written the ugly regex parsing hacks for you. Try Connelly 
Barnes' HTMLData: 
http://oregonstate.edu/~barnesc/htmldata/ 

Or BeautifulSoup as others have suggested.

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From psdasilvaX at esotericaX.ptX  Sat Mar 24 10:02:58 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 24 Mar 2007 14:02:58 +0000
Subject: Join strings - very simple Q.
In-Reply-To: <pan.2007.03.24.03.22.09.963233@REMOVE.THIS.cybersource.com.au>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<pan.2007.03.24.03.22.09.963233@REMOVE.THIS.cybersource.com.au>
Message-ID: <1174746809.657937@jubilee.claranet.pt>

Steven D'Aprano escreveu:
> On Fri, 23 Mar 2007 13:15:29 -0700, John Machin wrote:
> 
....

> 
> Western civilization is 6,000 years old. 

After reading that post I wouldn't talk about
civilization, western or any other :-)

Regards.
Paulo


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 01:09:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 02:09:31 -0300
Subject: Still the __new__ hell ...
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
	<1174337519.926611@jubilee.claranet.pt>
	<46010e1a$0$2347$426a74cc@news.free.fr>
Message-ID: <op.tpmlx5vlx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 07:51:32 -0300, Bruno Desthuilliers  
<bruno.42.desthuilliers at wtf.websiteburo.oops.com> escribi?:

> Paulo da Silva a ?crit :
>> As a relatively inexperient
>> in python, how could I know that a 'string' is an instance of
>> basestring?
>
> By reading this newsgroup ?-)

Or asking Python itself:

>>> type("any string").mro()
[<type 'str'>, <type 'basestring'>, <type 'object'>]

-- 
Gabriel Genellina



From adam at atlas.st  Mon Mar 26 21:02:39 2007
From: adam at atlas.st (Adam Atlas)
Date: 26 Mar 2007 18:02:39 -0700
Subject: Python C extension providing... Python's own API?
In-Reply-To: <1174942538.061137.93130@r56g2000hsd.googlegroups.com>
References: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>
	<1174942538.061137.93130@r56g2000hsd.googlegroups.com>
Message-ID: <1174957359.286188.178330@y66g2000hsf.googlegroups.com>

On Mar 26, 4:55 pm, "Matimus" <mccre... at gmail.com> wrote:
> I think that is what the "code" module is for. Maybe not exactly what
> you were expecting, but the capability you describe is already there.
> Being able to access its own interpreter is one of the things that
> makes Python a  dynamic language.

That's not really what I'm after. Believe me, I've searched the
standard library in length and breadth. :) The `code` module runs in
the same interpreter, basically executing as though it were just a
separate module (except interactively). What I'm interested in is
accessing Python's C API for CREATING interpreters -- i.e. what
mod_python or anything else embedding the Python interpreter would do.
Creating a whole environment, not just a module; it has its own `sys`
parameters, its own `__builtin__`, and so on, so you can safely mess
with those without changing them in the parent interpreter.

So far, I've tried ctypes, and it doesn't work; then I noticed the
docs said it wouldn't anyway. But I think I'll try writing a C
extension module. This could be interesting for sandboxing &c.



From rampeters at gmail.com  Thu Mar 15 20:09:55 2007
From: rampeters at gmail.com (johnny)
Date: 15 Mar 2007 17:09:55 -0700
Subject: newb: Python Floating Point
Message-ID: <1174003795.849903.273220@l75g2000hse.googlegroups.com>

When I do the following, rounding to 2 decimal places doesn't seem to
work.  I should get 0.99 :

>>> a =0.99
>>> a
0.98999999999999999
>>> round(a,2)
0.98999999999999999
>>>

thank you.



From parsons.nicholas1 at gmail.com  Sat Mar  3 15:36:08 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Sat, 3 Mar 2007 15:36:08 -0500
Subject: pop method question
Message-ID: <BD7BBB02-B5E3-4899-BC2C-E343DC728190@gmail.com>

Howdy Folks,

I was just playing around in IDLE at the interactive prompt and typed  
in dir({}) for the fun of it.  I was quite surprised to see a pop  
method defined there.  I mean is that a misnomer or what?  From the  
literature, pop is supposed to be an operation defined for a stack  
data structure.  A stack is defined to be an "ordered" list data  
structure.  Dictionaries in Python have no order but are sequences.   
Now, does anyone know why the python core has this pop method  
implemented for a dictionary type?

I realize that in this context it is used for removing a specific key  
from the current dictionary object.  But why call it pop and not  
something more intuitive like remove or delete?

Thanks for the clarification in advance :).

--Nick






From http  Thu Mar  8 01:57:20 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 22:57:20 -0800
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<BjOHh.4274$B7.1853@bigfe9>
Message-ID: <7xabyo5ijz.fsf@ruckus.brouhaha.com>

Brian Adkins <lojicdotcomNOSPAM at gmail.com> writes:
> This may sound like I'm baiting you, but it's a sincere question. If
> your experience with Perl was so good, why did you decide to pursue
> Python? Trouble free hosting and no problems in development - sounds
> like it worked out well for you.

Er, because the Perl language itself is up there with Vogon poetry in
bletcherousness?


From orsenthil at gmail.com  Wed Mar 14 12:12:56 2007
From: orsenthil at gmail.com (Phoe6)
Date: 14 Mar 2007 09:12:56 -0700
Subject: print and softspace in python
Message-ID: <1173888776.475236.81720@d57g2000hsg.googlegroups.com>

print and softspace in python
In python, whenever you use >>>print statement it will append a
newline by default. If you don't want newline to be appended, you got
use a comma at the end (>>>print 10,)
When, you have a list of characters and want them to be printed
together a string using a for loop, there was observation that no
matter what there was space coming between the characters. No split
or  join methods helped.
>>>list1=['a','b','c']
>>>for e in list1:
           print e,
a b c
>>># Without whitespace it will look like.
>>>print "abc"
abc

The language reference says that print is designed to output a space
before any object. And some search goes to find and that is controlled
by softspace attribute of sys.stdout.
Way to print without leading space is using sys.stdout.write()

>>>import sys
>>>for e in list1:
          sys.stdout.write(e)
abc

Reference manual says:
A space is written before each object is (converted and) written,
unless the output system believes it is positioned at the beginning of
a line. This is the case (1) when no characters have yet been written
to standard output, (2) when the last character written to standard
output is "\n", or (3) when the last write operation on standard
output was not a print statement. (In some cases it may be functional
to write an empty string to standard output for this reason.)

Question to c.l.p
Am Not getting the last part as how you will write  a empty string and
use print  not appending  blank space in a single line. Am not getting
the (In some cases... ) part of the reference manual section. Please
help.



From nmilkovits at gmail.com  Tue Mar 27 10:29:51 2007
From: nmilkovits at gmail.com (Nicholas Milkovits)
Date: Tue, 27 Mar 2007 10:29:51 -0400
Subject: Type allocation in extensions
Message-ID: <71a75690703270729j2f3b3243td521cedaec1d96f7@mail.gmail.com>

Hi everyone,

I've been reading through the documentation on extending and embedding
python and the C API and I have a question about how allocation occurs
of one type from another type. For example lets so I make to C module
foo.c and bar.c and each has a python type.  If I want to define a
method in foo.c that will return and new bar object how would I go
about doing that. Do I need to initialize tp_call and tp_alloc in
order to use PyObject_Call()? Also, If I do not supply an allocfunc
but instead initialize it to 0 when I declare my PyTypeObject for foo
does it automatically get set to a generic allocation function?

For example:

In python I want to be able to write:

f = Foo.new()
b = foo.bar()


bar.c

static PyTypeObject BarType = {
    PyObject_HEAD_INIT(NULL)
    0,				      // ob_size
    "bar",			    // tp_name
    sizeof(bar),			// tp_basicsize
    0,					    // tp_itemsize
    (destructor) Bar_Free,     // tp_dealloc
    .........snip...........
    0,                                 //tp_call
    .........snip...........
    (initproc) Bar_Init,       // tp_init
    0,				      // tp_alloc
    Bar_New,			// tp_new
    0,				     // tp_free


static PyObject *Bar_New(PyTypeObject *type, PyObject *args, PyObject
keywordArgs)
{
     // How does this call work if I never set an allocfunc pointer when I
    // declared the bar type	
     return= type->tp_alloc(type, 0);
}


foo.c

// Is PyObject_Call what I want to use and if so
// how does it work if tp_call was initialized to 0
// or not even specified in my BarType variable?
static PyObject *Foo_NewBar(foo *self, PyObject *args)			
{
    PyObject *createArgs, *bar_ref;

    createArgs = PyTuple_New();
    if (!createArgs)
        return NULL;
    Py_INCREF(self);
    bar_ref = PyObject_Call( (PyObject*) &BarType, createArgs, NULL);
    Py_DECREF(createArgs);
    return bar_ref;
}

Thanks in advace for the help,
Nick


From aleax at mac.com  Sun Mar 11 15:12:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 12:12:50 -0700
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<et1hjq$okj$1@tdi.cu.mi.it>
Message-ID: <1hut8e8.g1jy3a1hj5hobN%aleax@mac.com>

Army1987 <please.ask at for.it> wrote:

> "cesco" <fd.calabrese at gmail.com> ha scritto nel messaggio 
> news:1173451441.077648.321270 at c51g2000cwc.googlegroups.com...
> >I have to generate a list of N random numbers (integer) whose sum is
> > equal to M. If, for example, I have to generate 5 random numbers whose
> > sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> > simple pattern or function in Python to accomplish that?
> >
> > Thanks and regards
> > Francesco
> 
> 
> You can initialize a list to [1, 1, 1, 1, 1], and generate 45 random 
> integers between 1 and 5, and every time a number is generated, increase the
> Nth number in the list by one.
> 
> Not all distinct lists will have the same chance of occurring, e.g. [46, 1,
> 1, 1, 1] will be much less likely than [10, 10, 10, 10, 10]. Depending on
> what you need these numbers for, it can be a good thing or a bad thing.

And a1-liner way to get the numbers (net of the mandatory +1 for each)
is:

  map([random.randrange(5) for i in xrange(45)].count, xrange(5))

i.e., this gives 5 integers (each between 0 and 45 included) summing to
45 -- add 1 to each of them to get the desired result.

Without any specification regarding the distributions required for the
"5 random numbers" it's really impossible to say whether these are
better or worse than other proposed solutions.


Alex


From deets at nospam.web.de  Mon Mar 19 09:24:12 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 Mar 2007 14:24:12 +0100
Subject: XML based programming language
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
Message-ID: <567h7sF287idqU1@mid.uni-berlin.de>

stefaan wrote:

>> Elementtree isn't lex. You are comparing apples and oranges here. Lex
>> tokenizes, yacc creates trees. Both of is covered in XML itself - it's
>> defined the tokenization and parsing, built into elementtree. So,
>> elemnttree is lex _and_ yacc for XML. And if your language is written in
>> XML, that's all there is to it.
> 
> I see your point. But yacc does more: I specify a grammar, and yacc
> will
> reject input files that do not conform to the grammar.
> Elementtree OTOH will happily accept any valid XML file, all checking
> has to
> implememented manually by me.

First of all: nearly all parsers allow syntactically more, than their
languages semantics actually admit. So you will have to have certain (most
of the time context sensitive) checks hand-coded. But this is a small
digression.

What you are after then is the usage of a validating parser, not just
well-formed XML-documents.

I'm not sure where element-tree stands regarding this, but I think 4suite
offers DTD, W3C-Schema and Relax-NG support.

All of these are grammar-specifications that allow you to define the
structure of your XML-documents with more constraints. 

Diez


From sturlamolden at yahoo.no  Mon Mar 26 11:40:00 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 26 Mar 2007 08:40:00 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1174923600.641523.151960@y66g2000hsf.googlegroups.com>

On Mar 26, 3:20 pm, "Noma... at gmail.com" <Noma... at gmail.com> wrote:

> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??

Fortran may be faster, but Python (with NumPy and SciPy) is often fast
enough. A lot of practitioners use Matlab, which is often slower than
Python. Matplotlib is an excellent Python extension for graphing
data.

Anyone serious about numerical computing should learn Fortran 95. But
use it sparsely and only where its needed. Fortran is perfect for
numerical work but useless for anything else. Usually the amount of
code that will benefit from using Fortran over NumPy makes up less
than a percent of the line count. You can call Fortran from Python
using f2py, so you can get the best from both worlds.









From ken at theoryyalgebra.com  Wed Mar  7 19:10:21 2007
From: ken at theoryyalgebra.com (Ken Tilton)
Date: Wed, 07 Mar 2007 19:10:21 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <LWHHh.1355$_a1.157@bignews7.bellsouth.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<LWHHh.1355$_a1.157@bignews7.bellsouth.net>
Message-ID: <OvIHh.23$5p2.0@newsfe12.lga>



Brian Adkins wrote:
> John Nagle wrote:
> 
>>    Neither Lisp nor Python is an "industrial strength language".
>> The infrastructure is too weak.  Hosting providers and distro
>> makers aren't concerned over whether Python works.  They
>> care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
>> Ask them.
>>
>>                 John Nagle
> 
> 
> In your excitement to post a sweeping and inaccurate generalization (you 
> missed diss'ing Ruby), I think you may have missed the point of my post. 
> I surely wasn't trying to restart a dead thread, I just thought it was 
> funny that there was a similarity to a line from Princess Bride in the 
> thread (see relevant part below that you cut out).
> 
> If you want to restart a debate, please go back and reply to some 
> serious post in the thread - don't hijack mine for your own evil 
> purposes and cut out the good parts - did you even see the movie?

Yes. I think George did, too. (I was wondering what you were up to.)

:)

kt


> 
> George Sakkis wrote:
>  > You keep using that phrase. I don't think it means what you think it
>  > means.
> 
> [Vizzini has just cut the rope The Dread Pirate Roberts is climbing up]
> Vizzini: HE DIDN'T FALL? INCONCEIVABLE.
> Inigo Montoya: You keep using that word. I do not think it means what 
> you think it means.

-- 
Well, I've wrestled with reality for 35 years, Doctor, and
I'm happy to state I finally won out over it.
                                   -- Elwood P. Dowd

In this world, you must be oh so smart or oh so pleasant.
                                   -- Elwood's Mom


From jtauber at jtauber.com  Fri Mar  9 19:26:01 2007
From: jtauber at jtauber.com (jtauber)
Date: 9 Mar 2007 16:26:01 -0800
Subject: Google Summer of Code 2007
Message-ID: <1173486361.596136.324360@p10g2000cwp.googlegroups.com>

Google's Summer of Code is on again!

And the Python Software Foundation is again applying to be a mentoring
organization.

A mailing list has been set up for people who are interested in
mentoring for the PSF. If you aren't able or willing to mentor but
still want to participate in discussion of possible project ideas, you
are more than welcome to join also.

You can subscribe at:

http://mail.python.org/mailman/listinfo/soc2007-mentors/

While the desire is for a decent number of projects to be directly
related to core Python development, proposals of general relevance to
Python are also welcome.

James



From dickinsm at gmail.com  Sun Mar 11 13:44:34 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 10:44:34 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <1hut07q.1fhewdebmz1c0N%aleax@mac.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
Message-ID: <1173635074.726444.88760@t69g2000cwt.googlegroups.com>

On Mar 11, 1:26 pm, a... at mac.com (Alex Martelli) wrote:
> [Long analysis of probable cause of the problem]

Thank you for this.  I was suspecting something along these lines,
but I don't yet know my way around the source well enough to figure
out where the problem was coming from.

> In the meantime, I hope that some available workarounds for the bug are
> clear from this discussion: avoid using multiple constants in a single
> compilation unit where one is 0.0 and another is -0.0, or, if you really
> can't avoid that, perhaps use compiler.compile to explicitly build the
> bytecode you need.

Yup: the workaround seems to be as simple as replacing all occurrences
of -0.0 with -(0.0).  I'm embarrassed that I didn't figure this out
sooner.

>>> x, y = -(0.0), 0.0
>>> x, y
(-0.0, 0.0)

Mark



From jgodoy at gmail.com  Tue Mar  6 17:51:33 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Tue, 06 Mar 2007 19:51:33 -0300
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
	<1huivd7.7l18eh1paqp0aN%aleax@mac.com> <87k5xu37vt.fsf@gmail.com>
	<1hujkzp.11vuf5x1a6yz2aN%aleax@mac.com>
Message-ID: <87649easui.fsf@gmail.com>

aleax at mac.com (Alex Martelli) writes:

> Not sure I get what you mean; when I write tests, just as when I write
> production code, I'm focused (not worried:-) about the application

semantics... ;-)  Thanks for the correction. 

> functionality I'm supposed to deliver.  The language mostly "gets out of
> my way" -- that's why I like Python, after all:-).

That's the same reason why I like it.  I believe it is not a coincidence that
we both like writing Python code. 

But there are cases where investigating is more necessary than testing.  This
is where I see the need of the interactive session.  For program's features I
also write tests. 

> I do generally keep an interactive interpreter running in its own
> window, and help and dir are probably the functions I call most often
> there.  If I need to microbenchmark for speed, I use timeit (which I
> find far handier to use from the commandline).  I wouldn't frame this as
> "worried with how to best use the language" though; it's more akin to a
> handy reference manual (I also keep a copy of the Nutshell handy for
> exactly the same reason -- some things are best looked up on paper).

That's the same use -- and the same most used functions -- that I have here.
I believe that I wasn't clear on my previous post, and this is why you saw a
different meaning to it.

> I don't really see "getting a bit big to setup" as the motivation for
> writing automated, repeatable tests (including load-tests, if speed is
> such a hot topic in your case); rather, the key issue is, will you ever

It's not for writing tests.  It's for investigating things.  If I have to open
database connections, make several queries to get to a point where I have the
object that I want to "dir()", it is easier to me to put that all in a file.
It isn't a test. 


> want to run this again?  For example, say you want to check the relative
> speeds of approaches A and B -- if you do that in a way that's not
> automated and repeatable (i.e., not by writing scripts), then you'll
> have to repeat those manual operations exactly every time you refactor
> your code, upgrade Python or your OS or some library, switch to another
> system (HW or SW), etc, etc.  Even if it's only three or four steps, who
> needs the aggravation?  Almost anything worth doing (in the realm of
> testing, measuring and variously characterizing software, at least) is
> worth automating, to avoid any need for repeated manual labor; that's
> how you get real productivity, by doing ever less work yourself and
> pushing ever more work down to your computer.

I won't write a script to write two commands and rerun them often.  But I
would for some more -- lets say starting from 5 commands I might start
thinking about having this somewhere where I can at least Cut'n'Past to the
interactive interpreter (even with readline's help). 


-- 
Jorge Godoy      <jgodoy at gmail.com>


From tjreedy at udel.edu  Wed Mar 21 13:29:38 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 Mar 2007 13:29:38 -0400
Subject: Testing Python updates
References: <1174488951.275163.305440@y66g2000hsf.googlegroups.com>
Message-ID: <etrq21$kjv$1@sea.gmane.org>


"Matthew" <msharelick at gmail.com> wrote in message 
news:1174488951.275163.305440 at y66g2000hsf.googlegroups.com...
| What is the methodology for testing the updates to the Python language?

By who?

There is an expanding /test directory in the pythonx.y/Lib directory.  Core 
developers run these about once a day on multiple systems.  People who 
build their own executable should run the same.  People who install a 
prebuilt executable may do the same, and should if they suspect a problem 
with their installation.

Application developers increasingly have their own automated test files 
that they run after running /Lib/test on a new installation.

Terry Jan Reedy





From exarkun at divmod.com  Mon Mar 26 09:42:11 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 26 Mar 2007 08:42:11 -0500
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <20070326134211.18920.1580959398.divmod.quotient.5650@ohm>

On 26 Mar 2007 06:20:32 -0700, "Nomad.C at gmail.com" <nomad.c at gmail.com> wrote:
>OK...
>I've been told that Both Fortran and Python are easy to read, and are

Python is hugely easier to read.

>quite useful in creating scientific apps for the number crunching, but
>then Python is a tad slower than Fortran because of its a high level

Fortran is massively faster than Python.

>language nature, so what are the advantages of using Python for
>creating number crunching apps over Fortran??

You can get the speed of fortran in Python by using libraries like
Numeric without losing the readability of Python.

Jean-Paul


From tjreedy at udel.edu  Thu Mar 22 01:51:31 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 22 Mar 2007 01:51:31 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl><pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au><etscd5$g0g$1@news.onet.pl><7WjMh.318$YL5.80@newssvr29.news.prodigy.net><1hvcadb.134pbvp1y39wi3N%aleax@mac.com>
	<DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
Message-ID: <ett5h2$1ll$1@sea.gmane.org>


"Mark T" <nospam at nospam.com> wrote in message 
news:DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d at comcast.com...
| This is interesting:
|
| >>> class Test(object):
| ...   def __getattribute__(self,n):
| ...     print 'reading',n
| ...     return object.__getattribute__(self,n)
| ...   def __setattr__(self,n,v):
| ...     print 'writing',n,v
| ...     return object.__setattr__(self,n,v)
| ...
| >>> x=Test()
| >>> x.a=1; x.b=2; x.c=3
| writing a 1
| writing b 2
| writing c 3
| >>> x.a=x.b=x.c
| reading c
| writing a 3
| writing b 3
| >>>
|
| I wouldn't have expected "a" to be assigned first in a right-to-left 
parsing
| order.  The result is the same in any case.

The assignment order is specified in the language reference.
But many never read and those who do can forget.
And even if the coder reads and remembers, a code reader may not have.
Which is why I suggested multiple statements in explicit order when it 
really matters.

tjr





From lbates at websafe.com  Thu Mar 15 16:24:45 2007
From: lbates at websafe.com (Larry Bates)
Date: Thu, 15 Mar 2007 15:24:45 -0500
Subject: problem with str()
In-Reply-To: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
Message-ID: <kOudnUPzedkBNmTYnZ2dnUVZ_g6dnZ2d@comcast.com>

7stud wrote:
> I can't get the str() method to work in the following code(the last
> line produces an error):
> 
> ============
> class test:
>         """class test"""
>         def __init__(self):
>                 """I am init func!"""
>                 self.num = 10
>                 self.num2 = 20
>         def someFunc(self):
>                 """I am someFunc in test!"""
>                 print "hello"
> 
> 
> obj = test()
> obj.someFunc()
> names = dir(obj)
> print names
> 
> methodList = [str for str in names if callable(getattr(obj, str))]
> print methodList
> 
> x = getattr(obj, methodList[0]).__doc__
> print x
> print type(x)
> print str(getattr(obj, methodList[0]).__doc__)
> ===========
> 
> Here is the output:
> 
> $ python test1.py
> hello
> ['__doc__', '__init__', '__module__', 'num', 'num2', 'someFunc']
> ['__init__', 'someFunc']
> I am init func!
> <type 'str'>
> Traceback (most recent call last):
>   File "test1.py", line 23, in ?
>     print str(getattr(obj, methodList[0]).__doc__)
> TypeError: 'str' object is not callable
> 
> This is part of some code in Diving Into Python,Chapter 4.  In case a
> function doesn't have a __doc__ string, and therefore __doc__ returns
> None, the code needs to convert each __doc__ to a string so that the
> result is guaranteed to be a string.
> 

You masked the built-in str method in your list comprehension.

Try changing to:

methodList = [s for s in names if callable(getattr(obj, str))]

I'll bet it will work then.

-Larry


From lobais at gmail.com  Mon Mar 26 10:50:09 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Mon, 26 Mar 2007 16:50:09 +0200
Subject: Sending ECHO_REQUEST (pinging) with python
References: <pan.2007.03.26.06.30.33@gmail.com>
	<mailman.5621.1174902301.32031.python-list@python.org>
Message-ID: <pan.2007.03.26.14.50.09@gmail.com>

Den Mon, 26 Mar 2007 11:24:34 +0200 skrev Michal 'vorner' Vaner:
> On Mon, Mar 26, 2007 at 08:30:16AM +0200, Thomas Dybdahl Ahle wrote:

>> Do anybody know how to do this in python?

> You need root for that and the ping command is allowed to have them by
> suid bit. You can execute ping from inside python and use ping as is, if
> you need.

Yeah, I could execute ping, but it would lock me harder to the platform.


From laurent.pointal at limsi.fr  Fri Mar 23 05:23:29 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 23 Mar 2007 10:23:29 +0100
Subject: how can I invoke a Java code?
In-Reply-To: <1174610940.971724.206900@l75g2000hse.googlegroups.com>
References: <1174610940.971724.206900@l75g2000hse.googlegroups.com>
Message-ID: <eu069v$u4f$1@news2.u-psud.fr>

momobear a ?crit :
> A friend of my write a Java program, and I want use it in my python
> program as a module. I searched the topic in Google and find maybe the
> better way is use GCJ to compile it. Is there any other way for me?
> the simple and speediness choice the better. thanks. 

See my links:
http://www.limsi.fr/Individu/pointal/python.html#liens-intautlang-java

You can look at
    * Jython
    * JPype
    * JEP
    * java2python





From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 21 17:09:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 22:09:39 +0100
Subject: Make variable global
In-Reply-To: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
References: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
Message-ID: <46019697$0$763$426a34cc@news.free.fr>

abcd a ?crit :
> I have a file, "a.py"
> 
> blah = None
> def go():
>     global blah
>     blah = 5
> 
>>From the python interpreter I try....
> 
> 
>>>>from a import *
>>>>blah
>>>>go()
>>>>blah
>>>>
> 
> 
> ...i was hoping to see "5" get printed out the second time I displayed
> blah, but it doesn't.  Now, if I type this same code directly into the
> python interpreter it works as i was hoping.  what i am missing?

In Python, 'global' means 'module level'. And 'variables' are 
name:object bindings in a namespace (mostly function, class or module). 
The way you import blah and go from module a creates two names (blah and 
go) in the current namespace, and bind these names to resp. a.blah and 
a.go. The fact that go rebinds a.blah doesn't impact current namespace's 
blah.

The following session may help you understanding what happens:

 >>> from a import *
 >>> dir()
['__builtins__', '__doc__', '__name__', 'blah', 'go']
 >>> import a
 >>> dir()
['__builtins__', '__doc__', '__name__', 'a', 'blah', 'go']
 >>> dir(a)
['__builtins__', '__doc__', '__file__', '__name__', 'blah', 'go']
 >>> go is a.go
True
 >>> go()
 >>> blah
 >>> a.blah
5
 >>>

Note that rebinding a name and mutating a (mutable) object are two 
distinct operations:

# b.py
blah = ['42']
def go():
     blah[0] = "yo"

def gotcha():
     global blah
     blah = ['gotcha']

 >>> from b import *
 >>> import b
 >>> blah
['42']
 >>> blah is b.blah
True
 >>> go()
 >>> blah
['yo']
 >>> b.blah
['yo']
 >>> blah is b.blah
True
 >>> gotcha()
 >>> blah
['yo']
 >>> b.blah
['gotcha']
 >>>

To make a long story short:
1/ avoid globals whenever possible
2/ when using (module) globals, either use them as pseudoconstants or as 
module's 'private' variables (IOW : only functions from the same module 
can modify/rebind them).

HTH


From duncan.booth at invalid.invalid  Wed Mar 21 12:17:11 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Mar 2007 16:17:11 GMT
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <Xns98FAA5AD419FCduncanbooth@127.0.0.1>

"dmitrey" <openopt at ukr.net> wrote:

> + it will not yield incompabilities with previous Python versions.

So how would you write:

    	func(-3)
      func(*param)

with your scheme? These already have an incompatible meaning:

   func -3
   func *param1


From khemkaamit at gmail.com  Mon Mar  5 05:45:02 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Mon, 5 Mar 2007 16:15:02 +0530
Subject: Dictionary of Dictionaries
In-Reply-To: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
References: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
Message-ID: <1360b7230703050245q75bf8834l40f54a3244243d80@mail.gmail.com>

On 5 Mar 2007 02:22:24 -0800, bg_ie at yahoo.com <bg_ie at yahoo.com> wrote:
> Hi,
>
> I have the following -
>
> messagesReceived = dict.fromkeys(("one","two"), {})

This will create a dictionary "messagesReceived", with all the keys
referring to *same instance* of the (empty) dictionary.
(   try: messagesReceived = dict( [(k,{}) for k in ('one', 'two') ] )   )
>
> messagesReceived['one']['123'] = 11111
> messagesReceived['two']['121'] = 22222
> messagesReceived['two']['124'] = 43333
>
> This gives:
>
> {'two': {'121': 22222, '123': 11111, '124': 43333}, 'one': {'121':
> 22222, '123': 11111, '124': 43333}}

And hence the results !


HTH,

-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From f.braennstroem at gmx.de  Tue Mar 27 16:13:04 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Tue, 27 Mar 2007 20:13:04 +0000
Subject: pattern search
In-Reply-To: <eubdj4$meh$1@atlantis.news.tpi.pl>
References: <mailman.5671.1175008459.32031.python-list@python.org>
	<eubdj4$meh$1@atlantis.news.tpi.pl>
Message-ID: <eubmli$esc$1@sea.gmane.org>

Hi to all,

Wojciech Mu?a schrieb am 03/27/2007 03:34 PM:
> Fabian Braennstroem wrote:
>> Now, I would like to improve it by searching for different 'real'
>> patterns just like using 'ls' in bash. E.g. the entry
>> 'car*.pdf' should select all pdf files with a beginning 'car'.
>> Does anyone have an idea, how to do it?
> 
> Use module glob.

Thanks for your help! glob works pretty good, except that I just
deleted all my lastet pdf files :-(

Greetings!
Fabian



From bg_ie at yahoo.com  Mon Mar  5 03:43:42 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 5 Mar 2007 00:43:42 -0800
Subject: Building a dictionary from a tuple of variable length
Message-ID: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>

Hi,

I have the following tuple -

t = ("one","two")

And I can build a dictionary from it as follows -

d = dict(zip(t,(False,False)))

But what if my tuple was -

t = ("one","two","three")

then I'd have to use -

d = dict(zip(t,(False,False,False)))

Therefore, how do I build the tuple of Falses to reflect the length of
my t tuple?

Thanks for your help,

Barry.



From ah at hatzis.de  Sat Mar 24 19:36:18 2007
From: ah at hatzis.de (Anastasios Hatzis)
Date: Sun, 25 Mar 2007 00:36:18 +0100
Subject: Pattern for foo tool <-> API <-> shell|GUI
In-Reply-To: <1174758918.211398.182560@l75g2000hse.googlegroups.com>
References: <mailman.5552.1174753928.32031.python-list@python.org>
	<1174758918.211398.182560@l75g2000hse.googlegroups.com>
Message-ID: <200703250036.18887.ah@hatzis.de>

On Saturday 24 March 2007 18:55, kyosohma at gmail.com wrote:
> On Mar 24, 10:31 am, Anastasios Hatzis <a... at hatzis.de> wrote:
> > I'm looking for a pattern where different client implementations can use
> > the same commands of some fictive tool ("foo") by accessing some kind of
> > API. Actually I have the need for such pattern for my own tool
> > (http://openswarm.sourceforge.net). I already started restructuring my
> > code to separate the actual command implementations from the command-line
> > scripts (which is optparser-based now) and have some ideas how to
> > proceed. But probably there is already a good pattern used for
> > Python-based tools.
> >
> > In the case that some of you are interested into this topic and my recent
> > thoughts, you may want to have a look at the description below. Any
> > comments are very much appreciated. Hopefully this list is a good place
> > for discussing a pattern, otherwise I would be okay to move this to
> > another place. Thank you.
> >
> > Here we go:
> > The tool package itself provides several commands, although not important
> > for the pattern itself, here some examples: modifying user-specific
> > preferences, creating and changing project settings files,
> > project-related
> > code-generation, or combinations of such commands ... later also commands
> > for transformation between several XML formats etc. The classes which
> > implement these commands are currently in multiple modules, each having a
> > class named CmdHandler.
> >
> > I have some Python scripts (each having a ScriptHandler classes), for use
> > via command-line. Each ScriptHandler class is responsible to add all
> > related command-line options and process those provided by the user
> > (based on optparse library from Python standard lib). The script then
> > calls the corresponding command and provide the verified options as
> > parameters.
> >
> > Due to the nature of the tool under specific conditions the following
> > results may come during command execution:
> > * successful execution, no interaction
> > * critical error, execution cancelled
> > * user interaction needed (e.g. prompt user to approve replace existing
> > directory (yes/no), prompt user to provide an alternative option)
> >
> > Command-line interactions work simply with raw_input().
> >
> > So far this works. Nevertheless, there are some other aspects that could
> > be improved, but this is another topic: The tool uses custom exceptions
> > (e.g. for critical errors) and logging features (based on logging from
> > Python standard lib). Currently no automated tests, but I have to add.
> >
> > For the next step I plan to support not only my own command-line scripts,
> > but also a GUI to access the commands, as well as 3rd-party products
> > (themselves command-line scripts or GUIs, such as foo plugins for any
> > 3rd-party-tools). As far as I see, these clients need to implement a
> > handler that:
> > (1) Collecting all required parameters and optional parameters from a
> > user (2) Provide these parameters for a particular call to command API
> > (3) Provides some kind of hooks that are called back from the API on
> > specific events, e.g. Question with user-choice; Information with
> > user-input (4) Provide a logging handler object from the tool logging
> > class or a sub-class of that in the case that a client-specific logging
> > object should be triggered on each debug, message, warning etc.
> >
> > (1) is very client-specific, e.g. in a GUI via dialogs.
> >
> > (2) Each command provides a signature for all required/optional
> > parameters. They are all verified from the command itself, although a
> > client could do some verification at the first place.
> >
> > (3) Example use-case: a command needs to know if the user wants the
> > command to proceed with a particular action, e.g. "Do you want to delete
> > bar.txt?" with "Yes", "No" and "Cancel" choice. So the client's handler
> > object (which is provided as first parameter to each command) implements
> > client-specific features to show the user this question (e.g. pop-up
> > dialog with question and three buttons), receive the user input (clicking
> > one of the buttons) and pass this choice back to the foo API.
> > Alternatively some kind of text information could be required, as in
> > raw_input(), so actually this probably would be two different interaction
> > features to be implemented.
> >
> > (4) The foo API also provides a logging class. The client needs to
> > initialize such an object and provide it as member of the handler object
> > provided to the API. I wonder if some clients may have own logging
> > features and want to include all log messages from foo tool to the own
> > logs. In this case a client could its own sub-class of the foo logging
> > class and extending it with callbacks to its (client-)native logging
> > object.
> >
> > What do you think about this?
> >
> > Best regards,
> > Anastasios
>
> I think if you want to use a GUI, wxpython or Tkinter would work well
> for you. wxPython has more widgets from the start, but is also more
> complex. Tkinter is good for quick and dirty GUIs, but gets
> increasingly more complicated to deal with the more complex the GUI
> has to be, in general. At least, that's what I am told.
>
> I started out using Tkinter. It's great for prototyping, but I had to
> port VBA code to a Python GUI and Tkinter just didn't have the widgets
> I needed (including the the submodules PMW and Tix). So I went with
> wxPython. I personally like it quite a bit. Plus you can use XRC with
> wxPython to help separate out the GUI code from the logic.
>
> Both toolkits can accept user input in myriads of ways and both have
> standard dialogs that look almost or exactly native to the OS they are
> running on. Download wxPython's demo to see all that it can do.
> Tkinter is already installed and it has demos in its subdirectory
> under Python.
>
> There's my 2 cents.
>
> Mike

Mike, thank you for your post and taking your time. I understand the reasons 
for your recommendation and totally agree with your considerations. Actually 
I already have decided to use wxPython for the GUI job in that project. I 
guess I didn't make myself very clear in the OP, sorry for this, so I try 
again with hopefully more clarity:

I'm working on a tool which is totally command-line based and consisting of 
multiple scripts. The user can execute a Python script in the shell, this 
script does some basic verification before delegating a call into my tool's 
package and depending on some arguments and options provided in the 
command-line, e.g.
    $python generate.py myproject --force --verbose
the tool processes whatever necessary. There are multiple command handlers 
available in this package which are responsible for different tasks and 
depending of the script that has been executed one or more of these command 
handlers are fired to do their work ;)

Now I need to extend my tool in that way, that it can be accessed not only 
from my own scripts, but also by other, additional "client implementations", 
such as my own wxPython-based GUI, as well as Python scripts and GUIs (wx, 
Tkinter,...) of other tools that integrate some kind of plug-in. For example 
there is a Python-based UML tool realized with wxGTK (AFAIR). The developers 
of this tool intent to create a small plug-in, so their users can access 
features of my tool inside of this UML tool.

So, I need to create an API that can be used by clients to access specific 
features of my tool. And I'm looking for patterns how this could be realized 
in a smart Pythonic way.

And I don't think that this is very trivial (at least not for my programming 
skill level). In the given example "generate.py" (above) the following 
scenario is pretty likely:

(1) User works with UML tool and clicks in some dialog a "generate" button
(2) UML tool triggers this event an calls a magic generate() method of my tool 
(via the API I provide for this purpose), like my generate.py script would do 
same way
(3) Somewhen with-in this generate process my tool may need to get some 
information from the user in order to continue (it is in the nature of the 
features that I can't avoid this need of interaction in any case).

Currently, since I have only this command-line script "user-interface", I have 
it that way implemented, that the command handler class (responsible to 
supervise the entire generate process) just prints a question to the console 
and prompts the user to input his choice. This is done by raw_input() called 
inside the command and the command handler itself receives the user response 
directly from the shell.

As far as I understand now, instead of calling raw_input() - which would make 
no sense if the client would be some GUI - my command handler should call 
some kind of hook or delegation method in the client, e.g. the method 
promptUser(QuestionText, UserChoiceArgs). Any client should implement at 
least this method.

If a client's promptUser() method is called the client would be responsible to 
realize the appropriate user-dialog, such as a shell input or a wxFrame or 
whatever reasonable for the nature of the client. Depending on the 
interaction of the user with this user-interface the client then passes the 
user-choice back to my tool as return value of promptUser().

In addition there would be other aspects, such as as triggers for logging 
messages a.s.o., but this is probably not that important yet.

I don't know if I'm totally wrong with this design. I appreciate that it would 
encapsulate the logic to layers of separated concerns and with such API it 
would be possible to develop new clients rather easy (which would be a great 
benefit, I think). There is just still doubt if there isn't a better way. I 
would think that I'm not the first one who has a command-line based tool in 
Python and wants to provide an interface to additional client programs, 
especially GUIs.

I tried to find some appropriate pattern or tutorial on the net, but haven't 
been successful.

Thank you, again.

Best regards,
Anastasios


From __peter__ at web.de  Sun Mar  4 16:48:00 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Mar 2007 22:48:00 +0100
Subject: Perl and Python, a practical side-by-side example.
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45eb3b34$0$1404$426a74cc@news.free.fr>
Message-ID: <esfeng$ui5$00$1@news.t-online.com>

Bruno Desthuilliers wrote:

>          print >> output, sorted(decorated_lines, reverse=True)[0][1]

Or just
           print >> output, max(decorated_lines)[1]

Peter


From israphelr at googlemail.com  Tue Mar 13 18:34:04 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 13 Mar 2007 15:34:04 -0700
Subject: Problem I have with a while loop/boolean/or
Message-ID: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>

Hi all.

I have a problem with some code :(

-----------

hint = raw_input("\nAre you stuck? y/n: ")
hint = hint.lower()

while (hint != 'n') or (hint != 'y'):
    hint = raw_input("Please specify a valid choice: ")

---------------------------------------------

so everytime I run the program, and enter my choice as y or n, I'm
told to 'Please Specify a valid Choice Again' and can't get out of the
loop.



-----------

hint = raw_input("\nAre you stuck? y/n: ")
hint = hint.lower()

while (hint != 'n'):
    hint = raw_input("Please specify a valid choice: ")

---------------------------------------------

As for here when I enter n, I can leave the while loop.

Anyway I can't put my finger on this, so I'd be real grateful if
someone could tell me what I've done wrong. Thanks.
(I have a guy feeling it's something really silly I'm overlooking...)



From johnpote at blueyonder.co.uk  Tue Mar 20 21:44:41 2007
From: johnpote at blueyonder.co.uk (John Pote)
Date: Wed, 21 Mar 2007 01:44:41 GMT
Subject: select.poll and winXP
Message-ID: <d60Mh.184321$1E3.122656@fe3.news.blueyonder.co.uk>

Hi all,

I have the standard Python 2.4.4 windows download installed on my win XP 
box. But the poll class in module select is not available. The docs indicate 
that it can work with windows as long as only sockets are used which is fine 
for me.

Is there a reason it's not in the standard build, can I use it if I re 
compile the 'select' module from the source?

Thanks for any help anyone can give

John 




From bjourne at gmail.com  Mon Mar 19 12:29:40 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Mon, 19 Mar 2007 17:29:40 +0100
Subject: When is List Comprehension inappropriate?
In-Reply-To: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
Message-ID: <740c3aec0703190929v217d35f3ya26682f9355820b9@mail.gmail.com>

On 19 Mar 2007 07:41:59 -0700, Ben <bensherman at gmail.com> wrote:
> I have recently learned how list comprehension works and am finding it
> extremely cool.  I am worried, however, that I may be stuffing it into
> places that it does not belong.
>
> What's the most "pythony" way to do this:
>
> even = []
> for x in range(0,width,2):
>     for y in range(0,height,2):
>         color = im.getpixel((x,y))
>         even.append(((x,y), color))
>
> versus list comprehension:
>
> even2 = [((x,y), im.getpixel((x,y))) for x in range(0,width,2) for y
> in range(0,height,2)]

I would definitely not use list comprehension in this case. While they
may be faster, Psyco is great here. Also, if you have lots of 2d-loops
like "for x in something: for y in something:", then it could be more
beautiful to separate the iteration from the task:

def iterimage(im, width, height, step = 1):
    for y in range(0, height, step):
        for x in range(0, width, step):
            yield (x, y), im.getpixel((x, y))

Then the list comprehension becomes a little more manageable:

even2 = [(pos, col) for pos, col in iterimage(im, width, height, 2)]

Although this must definitely be the slowest of all the different approaches.

-- 
mvh Bj?rn


From ntv1534 at gmail.com  Thu Mar 22 03:38:46 2007
From: ntv1534 at gmail.com (MooMaster)
Date: 22 Mar 2007 00:38:46 -0700
Subject: Color Segmentation w/ PIL?
Message-ID: <1174549126.754309.317260@n76g2000hsh.googlegroups.com>

I'm trying to write a Digital Image Processing program using the PIL
library, and upon consultation of the Handbook I see that it seems to
have built in functions to run Edge Detection (in the ImageFilter
module), but I don't see anything about Segmentation. Are there any
built-in tools to do this operation? Has anyone done this operation
with PIL in the past that can lead me in the right direction?



From ayaz at dev.slash.null  Tue Mar  6 04:15:03 2007
From: ayaz at dev.slash.null (Ayaz Ahmed Khan)
Date: Tue, 06 Mar 2007 14:15:03 +0500
Subject: Newbie question
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<eshihi$1vq7$1@ulysses.news.tiscali.de>
	<1173117307.283564.22270@30g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.06.09.15.00.164763@dev.slash.null>

"Joshua.R.English at gmail.com" typed:
>> Tommy Grav schrieb:
>> For this case, there are list comprehensions (or map, but you shouldn't
>> use it any longer):
>
> I didn't see anything in the docs about this.  Is map going away or is
> it considered un-Pythonic now?

Most everywhere I've read about map() and filter() seemed to
discourage their use stating that they're becoming depreciated (with the
exception of Dive Into Python which advocates use of these two functions
in preference to even list comprehensions, if I've read it properly).

-- 
Ayaz Ahmed Khan

Falling in love makes smoking pot all day look like the ultimate in
restraint.
                -- Dave Sim, author of "Cerebus".


From hitesh287 at gmail.com  Mon Mar 12 13:58:37 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 12 Mar 2007 10:58:37 -0700
Subject: glob.glob output
Message-ID: <1173722316.890388.67210@30g2000cwc.googlegroups.com>

import string
import os

f = open ("c:\\servername.txt", 'r')
linelist = f.read()

lineLog = string.split(linelist, '\n')
lineLog = lineLog [:-1]
#print lineLog
for l in lineLog:
    path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
    glob.glob(path1)

When I run above from command line python, It prints the output of
glob.glob but when I run it as a script, it does not print
anything.... I know that there are files like xtRec* inside those
folders.. and glob.glob does spits the path if run from python command
line.

I tried something like this but did not work:
for l in lineLog:
    path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
    xtRec = glob.glob(path1)
    print xtRec

No results...

xtRec = []
for l in lineLog:
    path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
    xtrec = glob.glob(path1)
print xtRec

 No luck here either.

Seems like I am doing here something reallt silly mistake..

Thank you,
hj



From paddy3118 at googlemail.com  Thu Mar 29 01:06:31 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 28 Mar 2007 22:06:31 -0700
Subject: Modal value of an array
In-Reply-To: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
Message-ID: <1175144791.467051.144390@r56g2000hsd.googlegroups.com>

On Mar 29, 4:40 am, "datta.abhi... at gmail.com"
<datta.abhi... at gmail.com> wrote:
> Hi
>
>  How can I find out the modal value in an array. That is the value
> which occurs maximum time in the sequence ..
>
> e.g. if my array has values like [2,3,2,2,2,4,2,2]  definitely the
> maximum time 2 occurs in the array. so this function should be able to
> return 2 as a result ..
>
> So is there any function in built in python which can do that ?
>
> Thanks
>
> Abhirup

With the same assumptions as Ben Finney, I came up with this:

>>> import operator
>>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
>>> count = {}
>>> for item in foo: count[item] = count.get(item, 0) +1
...
>>> maxitem = max(count.items(), key= operator.itemgetter(1))
>>> maxitem
('spam', 4)
>>>

I was trying to minimise the iterations through the list.

- Paddy.



From paddy3118 at googlemail.com  Wed Mar 21 16:23:19 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 21 Mar 2007 13:23:19 -0700
Subject: Wikipedia and a little piece of Python History
In-Reply-To: <871wjiuz5q.fsf@pobox.com>
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<871wjiuz5q.fsf@pobox.com>
Message-ID: <1174508599.250404.176510@y66g2000hsf.googlegroups.com>

On Mar 21, 8:20 pm, j... at pobox.com (John J. Lee) wrote:
> "Paddy" <paddy3... at googlemail.com> writes:
> > I just had a link to Tim peters first post on doctest:
> >http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> > removed fromhttp://en.wikipedia.org/wiki/Doctestas it doesn't fit
> > their guidelines for external links.
> > I wonder, could maybe the official website be persuaded to host a copy
> > so that it could be linked to?
>
> > Tim, would you object?
>
> It (wikipedia) is a wiki, why not edit the page and paste it in?
>
> John

They have rules, and periodically trawl pages and clean them. I'd like
to stay within the rules.

- Paddy.



From skip at pobox.com  Fri Mar 30 14:04:22 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 30 Mar 2007 13:04:22 -0500
Subject: LRU cache (and other things missing from the standard library ...)
In-Reply-To: <1100121983.30976.22.camel@bad.dynu.ca>
References: <1100121983.30976.22.camel@bad.dynu.ca>
Message-ID: <17933.20774.865681.868732@montanaro.dyndns.org>


    Evan> I agree that LRU caches are a data structure too frequently
    Evan> re-implemented in Python. I'd also like to see a "standard" cache
    Evan> package, either as part of the standard library or elsewhere.  To
    Evan> that end, I've just uploaded an LRU cache package to the Python
    Evan> Package Index:

    Evan> http://www.python.org/pypi?:action=display&name=lrucache&version=0.2

Couldn't get to your website, but I've been using this one I wrote for
several years:

    http://www.webfast.com/~skip/python/Cache.py

I'm just coming to this thread, so I don't know how it compares with your
requirements.

Skip


From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  1 17:23:22 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 01 Mar 2007 23:23:22 +0100
Subject: Questions about app design - OOP with python classes
In-Reply-To: <1172784257.370311.272620@8g2000cwh.googlegroups.com>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<1172784257.370311.272620@8g2000cwh.googlegroups.com>
Message-ID: <45e74a80$0$29387$426a34cc@news.free.fr>

adriancico at gmail.com a ?crit :
> On Mar 1, 9:45 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>  
> I understand (I've been in wikipedia :-) ). Right now the Frame is the
> controller as well
> as the view.

Yeps. Note that this is a common "simplification" of the MVC - Microsoft 
labelled it "Document/View".

(snip)
> My problem was that, altough I knew OOP basics, I didn't know how to
> apply them exactly.

It mostly comes out of experience IMHO. But reading the GOF (I let you 
google for what this TLA refers to !-) may not be a bad idea - it's 
probably the best book about OO design I've read so far, even if lot of 
the described patterns make less sens in an highly dynamic language like 
Python.

>>Note that there's nothing Python-specific in your question. But since
>>comp.object is one of the worst places on earth to ask questions about OO...
> 
> 
> I am developing in Python, so it made sense to me to post here. But
> you are right, the question
> is off-topic. Sorry for that.

Alas, the appropriate newsgroup (comp.object) has turned into one of the 
most unfriendly and sterile places I know on the net.


From mail at microcorp.co.za  Wed Mar 21 01:54:28 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 21 Mar 2007 07:54:28 +0200
Subject: List to string
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com><1174192714.014092.79380@l77g2000hsb.googlegroups.com><45fe7ddc$0$25292$426a34cc@news.free.fr><pan.2007.03.20.03.41.19.501610@REMOVE.THIS.cybersource.com.au><45ffcd12$0$18276$426a74cc@news.free.fr>
	<pan.2007.03.20.12.35.38.787611@REMOVE.THIS.cybersource.com.au>
Message-ID: <021601c76b85$61b012e0$03000080@hendrik>

 "Steven D'Aprano" <steve at REMOVE.THIS.cyber...ce.com.au> wrote:

On Tue, 20 Mar 2007 13:01:36 +0100, Bruno Desthuilliers wrote:

8< ------- confusion about left and right ------------

It gets worse.

When you work on a lathe,
a "right hand cutting tool"
has its cutting edge 
on the left...

And the worse part is that
its for good reason.

- Hendrik



From psaroudakis at gmail.com  Tue Mar 27 07:58:44 2007
From: psaroudakis at gmail.com (psaroudakis at gmail.com)
Date: 27 Mar 2007 04:58:44 -0700
Subject: pygtk button event
Message-ID: <1174996724.249456.308140@r56g2000hsd.googlegroups.com>

Hi....


i am trying to implement the following:

I want to be able to press a button, perform a task and return a
value.

my button is named button1 and I used glade to build the gui.

so, something like this should work....


application=gtk.glade.XML('app.glade','app')
bt=app.get_widget('button1')
bt.connect('clicked',on_btClicked)
def on_btClicked(widget,event):
      if data==0:
         P=1
      else:
         P=2
      return P

How can I get P?

Something like this doesn't work:

bt.connect('clicked',P=on_btClicked)

How can I return P???


Thanks!

Nick



From spradml at gmail.com  Sat Mar 10 09:54:53 2007
From: spradml at gmail.com (Pradnyesh Sawant)
Date: Sat, 10 Mar 2007 20:24:53 +0530
Subject: making an "executable" for a python code (newbie)
Message-ID: <80628d680703100654x209e954cmf67a03f853c2c7ae@mail.gmail.com>

hello,
i have some python scripts (especially, PyQt4 scripts) that i want to
deploy on both linux and windows m/c's. different packaging tools that
i checked (cx_freeze, distutils, pyinstaller) allow me to create
"installers". however, i'm interested in creating "executables" that
allow the code to be run just on "double clicking". is there any way
to get this done?
also, it seems that "pyexe" creates a windows executable, but how do i
use it on linux?

thanks for all the help!


From michael at jedimindworks.com  Thu Mar 22 11:12:58 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 22 Mar 2007 10:12:58 -0500
Subject: My MVC critique
In-Reply-To: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
References: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
Message-ID: <B0F02BB7-6DB1-408B-A850-1A55037A52BA@jedimindworks.com>


On Mar 22, 2007, at 9:29 AM, scott.w.white at gmail.com wrote:
> mickey mouse

Well, at least you spelled Mickey Mouse right... :-)


From sjmachin at lexicon.net  Sat Mar 17 06:29:39 2007
From: sjmachin at lexicon.net (John Machin)
Date: 17 Mar 2007 03:29:39 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <7xfy845q24.fsf@ruckus.brouhaha.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
	<7xfy845q24.fsf@ruckus.brouhaha.com>
Message-ID: <1174127379.112302.227370@y80g2000hsf.googlegroups.com>

On Mar 17, 5:42 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Steven D'Aprano <s... at REMOVE.THIS.cybersource.com.au> writes:
> > or even
>
> > len(filter(lambda t, y=y: y>t, x))
>
> How about
>
>    min(i for i,t in enumerate(x) if t >= y)
>
> or
>
>    max(i for i,t in enumerate(x) if t <= y)
>
> Those are actually pretty direct.

I'd hate to see "indirect". Worse, the min-using gizmoid crashes when
y > x[-1] -- all your ifs are belong to False.


>>> x
[0, 100, 200, 1000]
>>> tests = [0, 1, 100, 150, 1000, 2000]
>>> [(y, max(i for i,t in enumerate(x) if t <= y)) for y in tests]
[(0, 0), (1, 0), (100, 1), (150, 1), (1000, 3), (2000, 3)]

Looks OK, iff one is happy with the OP's strange usage of "insert
point".
>>> xc = x[:]
>>> xc.insert(1, 150)
>>> xc
[0, 150, 100, 200, 1000]

Whoops.

Try this for size:

>>> [(y, sum(t <= y for t in x)) for y in tests]
[(0, 1), (1, 1), (100, 2), (150, 2), (1000, 4), (2000, 4)]

Cheers,
John





From rschroev_nospam_ml at fastmail.fm  Mon Mar 12 05:04:04 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Mon, 12 Mar 2007 09:04:04 GMT
Subject: Watching a file another app is writing
In-Reply-To: <vu-dnXYa49qinWjYnZ2dnUVZ_viunZ2d@comcast.com>
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
	<1173676363.653940.133030@30g2000cwc.googlegroups.com>
	<vu-dnXYa49qinWjYnZ2dnUVZ_viunZ2d@comcast.com>
Message-ID: <8I8Jh.61709$O92.368750@phobos.telenet-ops.be>

Gordon Airporte schreef:
> Nick Vatamaniuc wrote:
>   > You might need to look at pywin32 for Windows specific ways to listen
>> to "file changed" event.
>>
>> On Unix a quick shortcut would be to simply read the output of 'tail -
>> f <file>' command...
> 
> Ah, I forgot I have Cygwin installed, so I do have tail. Unfortunately 
> Windows will not let most programs save to the file while tail is 
> watching it, and when I force it with vim :w! the output from tail -f 
> does not update. Maybe I'm using it wrong.

Have you tried with tail -F instead of tail -f? With a big F it uses the 
name of the file instead of the file descriptor, and it keeps trying to 
open the file. I'm not sure if it will work, but it's worth a shot.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From o.ekanem at gmail.com  Thu Mar 29 15:55:07 2007
From: o.ekanem at gmail.com (Otu Ekanem)
Date: Thu, 29 Mar 2007 20:55:07 +0100
Subject: Web21C Python SDK - announce
Message-ID: <800c1b0b0703291255x16a042b7jbfc982c906a5f9b4@mail.gmail.com>

The BT Web21C python SDK is a package which abstract the SOAP/WsSecurity
stack from end users allowing them to write python
code to access BT plethora of webservices directly.

You can use it to make phone calls, conference calls, send text messages
(SMS) and locate people based on cell of origin data.

I have a short introduction here
http://rants.ekanem.de/2007/03/29/make-it-ring-with-python/ and the actual
website is at http://web21c.bt.com/

-- 
Otu Ekanem

http://www.ekanem.de
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From ianmurrays at gmail.com  Sun Mar 18 10:41:21 2007
From: ianmurrays at gmail.com (Synt4x)
Date: 18 Mar 2007 07:41:21 -0700
Subject: Webcams and python
In-Reply-To: <pan.2007.03.18.08.24.46.950750@gmx.net>
References: <1174182674.500068.252550@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.08.24.46.950750@gmx.net>
Message-ID: <1174228881.417754.26020@e65g2000hsc.googlegroups.com>

On 18 mar, 04:24, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <1174182674.500068.252... at p15g2000hsd.googlegroups.com>, Synt4x wrote:
> > from VideoCapture import Device
> > cam = Device()
>
> > while 1:
> >     img = cam.getImage()
>
> > Now, by doing this, my processor fires up to 100% load, which
> > obviously makes my pc useless.
>
> > Is there any way or algorithm to lower the cpu load?
>
> Just throw a small `time.sleep()` into the loop.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

The problem with adding a sleep() instrucction is that the "video
feed" looks lagged, if you know what I mean. It looks interrupted.



From http  Sat Mar 10 14:43:56 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 11:43:56 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<1173547852.666259@jubilee.claranet.pt>
Message-ID: <7xbqj0g9z7.fsf@ruckus.brouhaha.com>

Paulo da Silva <psdasilvaX at esotericaX.ptX> writes:
> May be this is what you want ...
> I didn't test it enough ... but seems fine.

That's way too complicated.  Think about Gerald Flanagan's description
of the telegraph poles, and how to implement simply.  It is a two liner.


From gregturn at mindspring.com  Mon Mar 12 15:36:39 2007
From: gregturn at mindspring.com (Goldfish)
Date: 12 Mar 2007 12:36:39 -0700
Subject: New to Python
In-Reply-To: <mailman.4977.1173719152.32031.python-list@python.org>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
	<1173704503.459048.310560@t69g2000cwt.googlegroups.com>
	<mailman.4964.1173705902.32031.python-list@python.org>
	<55l63sF252nesU1@mid.uni-berlin.de>
	<mailman.4977.1173719152.32031.python-list@python.org>
Message-ID: <1173728198.924296.287410@64g2000cwx.googlegroups.com>

I read http://diveintopython.org/ online, and covered a lot of Python
territory nicely with this.

Greg



From steve at holdenweb.com  Wed Mar 21 21:24:04 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 21:24:04 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <etscd5$g0g$1@news.onet.pl>
References: <ets9hc$74f$1@news.onet.pl>	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
Message-ID: <etslus$vg6$1@sea.gmane.org>

Marcin Ciura wrote:
> Steven D'Aprano wrote:
>>>>> x, y, z = 1, 2, 3
>>>>> x = y = z
>>>>> x, y, z
>> (3, 3, 3)
>>
>> I certainly wouldn't expect to get (2, 3, 3).
> 
> Neither would I. I must have expressed myself not clearly enough.
> Currently
> x = y = z
> is roughly equivalent to
> x = z
> y = z
> I propose to change it to
> y = z
> x = z
> Cheers,
>    Marcin

The difference being ... ?
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From mail at microcorp.co.za  Wed Mar 14 03:15:40 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 14 Mar 2007 09:15:40 +0200
Subject: number generator
References: <mailman.5048.1173833625.32031.python-list@python.org>
	<pan.2007.03.14.01.14.48.92442@REMOVEME.cybersource.com.au>
Message-ID: <020601c7660c$b29999c0$03000080@hendrik>

 "Steven D'Aprano" <steve at REMOVEME.cyb...ource.com.au> wrote:

> 
> Consider the distance between each paid of consecutive poles. The sum of
> the distances must add up to the distance from the first to the last, and
> if there are two fixed poles plus five in between, there are five
> distances.

No there are six distances - the fifth pole has to fit in the same hole as the 
last fixed one for there to be five.

- Hendrik



From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 09:45:38 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 21 Mar 2007 00:45:38 +1100
Subject: Bullet proof passing numeric values from NMEA data stream.
References: <pan.2007.03.20.12.09.21.19785@localhost.localdomain>
	<pan.2007.03.20.13.28.59.24933@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2007.03.20.13.45.37.9884@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 00:29:00 +1100, Steven D'Aprano wrote:

> All your examples include spurious whitespace. If that is the only
> problem, here's a simple fix:
> 
> def despace(s):
>     """Remove whitespace from string s."""
>     return 

Gah! Ignore that stub. I forgot to delete it :(


While I'm at it, here's another solution: simply skip invalid values,
using a pair of iterators, one to collect raw values from the device and
one to strip out the invalid results.

def raw_data():
    """Generator to collect raw data and pass it on."""
    while 1:
        # grab a single value
        value = grab_data_value_from_somewhere()
        if value is "": # Some special "END TRANSMISSION" value.
            return
        yield value

def converter(stream):
    """Generator to strip out values that can't be converted to float."""
    for value in stream:
        try:
            yield float(value)
        except ValueError:
            pass

values_safe_to_use = converter(raw_data())

for value in values_safe_to_use:
    print value


Naturally you can extend the converter to try harder to convert the string
to a float before giving up.


-- 
Steven.



From andi.clemens at gmx.net  Thu Mar  1 10:37:25 2007
From: andi.clemens at gmx.net (andi.clemens at gmx.net)
Date: 1 Mar 2007 07:37:25 -0800
Subject: How to update DNS record
In-Reply-To: <mailman.4573.1172758814.32031.python-list@python.org>
References: <1172751262.972242.215990@p10g2000cwp.googlegroups.com>
	<mailman.4573.1172758814.32031.python-list@python.org>
Message-ID: <1172763444.358192.237770@j27g2000cwj.googlegroups.com>

Hi,
I'm just a trainee working here and I don't really know how the old
Perl script worked.
But I can post the function, maybe you can recognize what is going on
there:

my $domain = "wiv-dom.com";
my $nameserver = "bldc01.wiv-dom.com";

sub makeDNSEntry {
    my $res = new Net::DNS::Resolver;
    my $query = $res->query("$domain", "NS");
    if ($query) {
        print "\nMaking entries into nameserver...\nSearching for
nameservers...\n\n" if $opt{d};
        foreach my $rr ($query->answer) {
            next unless $rr->type eq "NS";
            print $rr->nsdname, "\n" if $opt{d};
        }
    }
    else {
        print "query for Nameserver for $domain failed: ", $res-
>errorstring, "\n";
    }
    my $update = new Net::DNS::Update("$domain");
    $update->push("pre", yxrrset("$snmpHostName.$domain. A"));
    $update->push("update", rr_del("$snmpHostName.$domain. A"));
    $update->push("update", rr_add("$snmpHostName.$domain. 3600 A
$outbound"));
    $res = new Net::DNS::Resolver;

    $res->nameservers("$nameserver");
    print "\nNameserver for $domain :" . $nameserver, "\n" if $opt{d};
    my $reply = $res->send($update);

    if (defined $reply) {
        if ($reply->header->rcode eq "NOERROR") {
            print "Update for $snmpHostName.$domain. OK\n" if $opt{d};
        } else {
            print "Update for $snmpHostName.$domain. ERROR : ". $reply-
>header->rcode. "\n" if $opt{d};
        }
    } else {
        print "RESERROR : No reply: ". $res->errorstring. "\n";
    }
}

What I want to do is change the A-Record of existing entries in the
DNS server.

I'm getting all the IPs from a django database and ask them via SNMP
what their outbound address is, then I want to change those settings
in our DNS server like in the perl script above.

Sorry for my bad explanation, but I never worked with DNS before...

Andi



From __peter__ at web.de  Fri Mar 30 13:29:19 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Mar 2007 19:29:19 +0200
Subject: clean up html document created by Word
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
Message-ID: <eujhd8$sh0$02$1@news.t-online.com>

jd wrote:

> I am looking for python code (working or sample code) that can take an
> html document created by Microsoft Word and clean it up (if you've
> never had to look at a Word-generated html document, consider yourself
> lucky ;-)  Alternatively, if you know of a non-python solution, I'd
> like to hear about it.

The non-python solution:

http://www.w3.org/People/Raggett/tidy/

Peter


From duncan.booth at invalid.invalid  Fri Mar 23 08:19:15 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Mar 2007 12:19:15 GMT
Subject: "finally" for unit test
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
Message-ID: <Xns98FC7D56675EEduncanbooth@127.0.0.1>

"killkolor" <gabriel.hase at gmail.com> wrote:

> I have a unittest framework that tests a single function that in turn
> works with files (takes input and outputs in the same file, no return
> values).

I would want to split that function into two:

a) one which does the processing, but not working with a file,
b) and one which handles reading and calls the processing function and then 
writes the file. The function it calls would be passed in as an optional 
parameter and defaults to function (a)

Then you need two sets of tests:

 one to test the action of reading data from a file and then rewriting the 
output in-place, but you just pass in a mock function for the processing 
which can assert that it saw the expected inputs.

 and as many tests as you want for the processing, but no annoying files to 
get in the way.

If you really cannot have the processing without reading from a file, then 
let it take two files, input and output as parameters, and have the (b) 
function choose between calling it with separate input/output files or 
creating a temporary file which is renamed to replace the original on 
completion. Then at least you can read directly from the test inputs 
without ever needing to write them.


From steve at REMOVEME.cybersource.com.au  Thu Mar 22 02:48:29 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 17:48:29 +1100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<mailman.5426.1174515153.32031.python-list@python.org>
Message-ID: <pan.2007.03.22.06.48.28.563969@REMOVEME.cybersource.com.au>

On Thu, 22 Mar 2007 09:11:51 +1100, Ben Finney wrote:

> "Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:
> 
>> Is your program valuable? Is it worth money? Then the 90% of script
>> kiddies will just wait three days, and download the program off the
>> Internet after the real hackers have broken your protection.
> 
> The real hackers wouldn't be doing that.
> 
> The crackers, however, might.

I quote Bruce Schneier:

[quote]
For years I have refused to play the semantic "hacker" vs. "cracker" game.
There are good hackers and bad hackers, just as there are good
electricians and bad electricians. "Hacker" is a mindset and a skill set;
what you do with it is a different issue.
[end quote]

See his essay on "What is a hacker" here:
http://www.schneier.com/blog/archives/2006/09/what_is_a_hacke.html

In addition, virtually nobody outside of the IT hacker subculture knows
what you're talking about if you talk about crackers. Out network was
brought down by a biscuit???



-- 
Steven D'Aprano 



From rodin.alexander at gmail.com  Wed Mar 14 14:46:15 2007
From: rodin.alexander at gmail.com (inline)
Date: 14 Mar 2007 11:46:15 -0700
Subject: Constructor of object
In-Reply-To: <mailman.5097.1173895676.32031.python-list@python.org>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
	<mailman.5097.1173895676.32031.python-list@python.org>
Message-ID: <1173897975.419864.306930@b75g2000hsg.googlegroups.com>

On Mar 14, 9:05 pm, Thinker <thin... at branda.to> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> inline wrote:
> > Hello! I want to assign self to object of parent class in
> > constructor, like
>
> > def my_func(): ... return ParentClass()
>
> > class MyClass (ParentClass): def __init__(self): self = my_func()
>
> > but it not work, because "object not initialized". What i can do?
>
> Do you want to call constructor of super-class to initialize the object?
> If it is true, you have following options.
>
> In old style class:
> class MyClass(ParentClass):
> def __init__(self):
> ParentClass.__init__(self)
>
> In new style class:
> class MyClass(ParentClass):
> def __init__(self):
> super(MyClass).__init__(self)
>
> Or
> class MyClass(ParentClass):
> def __init__(self):
> super(MyClass, self).__init__()
>
> - --
> Thinker Li - thin... at branda.to thinker... at gmail.comhttp://heaven.branda.to/~thinker/GinGin_CGI.py
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.6 (FreeBSD)
> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>
> iD8DBQFF+Dls1LDUVnWfY8gRAvDaAKDVmX8LmuWUdJ4eVil7l//rjCQZLQCg8dO8
> Y77CL1ikmtdl6S3HD04GWiA=
> =mvSe
> -----END PGP SIGNATURE-----

I know it, but i don't want call constructor of parent class - I use
PyGTK and want to load window from glade file and assign it to object,
parented gtk.Window:

#!/usr/bin/env python

import gtk
import gtk.glade

class HelloWindow (gtk.Window):
    def __init__(self):
        xml = gtk.glade.XML("hello.glade")
        xml.signal_autoconnect(self)
        self = xml.get_widget("window")

window = HelloWindow()
window.connect("delete_event", gtk.main_quit)
window.show_all()
gtk.main()



From sgeiger at ncee.net  Sun Mar 18 19:12:20 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Sun, 18 Mar 2007 18:12:20 -0500
Subject: where function
In-Reply-To: <1174259087.255048.286170@l77g2000hsb.googlegroups.com>
References: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>	<1174258135.009452.192960@e1g2000hsg.googlegroups.com>
	<1174259087.255048.286170@l77g2000hsb.googlegroups.com>
Message-ID: <45FDC754.4080304@ncee.net>

a = 
[0,1,2,3,4,2,8,9]                                                                                                                                           

                                                                                                                                                                

# method 
1                                                                                                                                                      

print [i for i in xrange(len(a)) if 
a[i]==2]                                                                                                                    

                                                                                                                                                                

def 
where(a,val):                                                                                                                                               

    return [i for i in xrange(len(a)) if 
a[i]==val]                                                                                                             

                                                                                                                                                                

# method 
2                                                                                                                                                      

print 
where(a,2)                                                                                                                                                

                                                                                                                                                                





vorticitywolfe at gmail.com wrote:
> On Mar 18, 10:48 pm, bearophileH... at lycos.com wrote:
>   
>> vorticitywo:
>>
>>     
>>> Is there a function in Python analogous to the "where" function in
>>> IDL?
>>>       
>> Python gives very elastic syntax, you can simply do:
>>
>> data = [0,1,2,3,4,2,8,9]
>> print [pos for pos, el in enumerate(data) if el==2]
>>
>> Bye,
>> bearophile
>>     
>
> Thank you both, a little more cumbersome than I expected, but it does
> the job! Thanks!
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From goodTweetieBird at hotmail.com  Wed Mar 21 15:47:06 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 12:47:06 -0700
Subject: Printing __doc__
Message-ID: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>

Greetings,

Don't know the daily limit for dumb questions so I will ask one or
more.

In a function I can use the statement n =
sys._getframe().f_code.co_name to get the name of the current
function. Given that I can get the name how can I print the __doc__
string? I cant use the following, it will tell me to bugger off as the
string has no such attribute.

def spam(self):
    n = sys._getframe().f_code.co_name
    print n.__doc__      #Wrong
    print __doc__         #No good either
    #....


thanx,

gtb



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 16:45:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 18:45:15 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<45ef2e12$0$28891$426a74cc@news.free.fr>
Message-ID: <op.tot9dpsmx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 19:00:59 -0300, Bruno Desthuilliers  
<bdesth.quelquechose at free.quelquepart.fr> escribi?:

> this kind of cose is exactly what OO polymorphic dispatch is supposed to

this kind of cose? Ce genre de chose?

-- 
Gabriel Genellina



From dartsch at dicad.de  Sun Mar 25 07:35:54 2007
From: dartsch at dicad.de (dartsch at dicad.de)
Date: 25 Mar 2007 04:35:54 -0700
Subject: Strange behavior when printing a returned closure function
In-Reply-To: <mailman.5581.1174820678.32031.python-list@python.org>
References: <1174820392.652008.123550@y80g2000hsf.googlegroups.com>
	<mailman.5581.1174820678.32031.python-list@python.org>
Message-ID: <1174822553.986885.91640@p77g2000hsh.googlegroups.com>

On Mar 25, 1:04 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On 25 Mar 2007 03:59:52 -0700, dart... at dicad.de wrote:
>
>
>
> >Hello,
>
> >when I execute the following code (python 2.5)
>
> >def f(x):
> >    def g():
> >        return x
> >    return g
>
> >print f(1)
> >print f(2)
>
> >I get an output like
>
> ><function g at 0x00AFC1F0>
> ><function g at 0x00AFC1F0>
>
> >So according to print I get the same function object returned at both
> >calls.
> >That's surprising, I would expect to get two distinct function objects
> >because their func_closure attribute has to be different. And indeed,
> >if I do
>
> >print f(1) is f(2)
>
> >instead, it prints False. Even more confusing, if I do
>
> >g1 = f(1)
> >g2 = f(2)
> >print g1
> >print g2
>
> >I get something like
>
> ><function g at 0x00AFC1B0>
> ><function g at 0x00AFC1F0>
>
> >ie. two distinct function objects are printed.
>
> >What's happening here?
> >Some clever optimization reusing function objects in special cases or
> >what ...?
>
> They're _not_ the same function object, just like the `is' test told you.
> They just happen to have been allocated at the same memory address.
>
> Jean-Paul

ah yes, I see, thanks



From aleax at mac.com  Thu Mar 29 21:58:45 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 18:58:45 -0700
Subject: Modal value of an array
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
	<1hvpovd.1anin2by4gjl1N%aleax@mac.com>
	<1175208296.769865.186480@r56g2000hsd.googlegroups.com>
Message-ID: <1hvr34h.12c953hpq7pavN%aleax@mac.com>

Paddy <paddy3118 at googlemail.com> wrote:
   ...
> > A bit more directly:
> >
> > >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> > >>> max(foo, key=foo.count)
> >
> > 'spam'
> >
> > Alex
> 
> This doesn't call foo.count for duplicate entries by keeping a cache
> 
> >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> >>> def cachecount(x, cache={}):
> ...   return cache.setdefault(x, foo.count(x))
> ...
> >>> max(foo, key=cachecount)
> 'spam'
> >>> cachecount.func_defaults
> ({'eggs': 2, 'beans': 1, 'spam': 4},)
> >>>

If you're willing to do that much extra coding to save some work (while
still being O(N squared)), then the further small extra needed to be
O(N) starts looking good:

counts = collections.defaultdict(int)
for item in foo: counts[item] += 1
max(foo, key=counts.get)


Alex


From gregturn at mindspring.com  Tue Mar  6 14:55:41 2007
From: gregturn at mindspring.com (Goldfish)
Date: 6 Mar 2007 11:55:41 -0800
Subject: Interface Implementation in Python
In-Reply-To: <mailman.4718.1173194071.32031.python-list@python.org>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
	<mailman.4718.1173194071.32031.python-list@python.org>
Message-ID: <1173210940.884656.158180@t69g2000cwt.googlegroups.com>

> >  I would like to know the interface concept in Python.How the
> > Interface is defined and implemented in Python?.

One way I have implemented interfaces, is as follows:

class MyInterface(object):
    def someMethod(self, argument):
        raise NotImplementedError()

If anybody ever uses that class directly, or subclasses it without
implementing a real version of that method, a runtime error can be
expected. This bridges both interfaces and abstract classes.

As others have pointed out, this isn't quite like a Java interface,
but I have found it useful to state my intentions up front, and that
is how I do it. The only way to truly enforce this is by following up
with lots of good test cases, run often.



From aahz at pythoncraft.com  Wed Mar 21 18:25:42 2007
From: aahz at pythoncraft.com (Aahz)
Date: 21 Mar 2007 15:25:42 -0700
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<etrper$t8g$1@gemini.csx.cam.ac.uk>
	<pan.2007.03.21.18.01.07.125772@REMOVE.THIS.cybersource.com.au>
	<slrnf0306k.1dh.nick@irishsea.home.craig-wood.com>
Message-ID: <etsbd6$e95$1@panix3.panix.com>

In article <slrnf0306k.1dh.nick at irishsea.home.craig-wood.com>,
Nick Craig-Wood  <nick at craig-wood.com> wrote:
>Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>>
>>  Or you could just have an "object leak" somewhere. Do you have any
>>  complicated circular references that the garbage collector can't resolve?
>>  Lists-of-lists? Trees? Anything where objects aren't being freed when you
>>  think they are? Are you holding on to references to lists? It's more
>>  likely that your code simply isn't freeing lists you think are being freed
>>  than it is that Python is holding on to tens of megabytes of random
>>  text.
>
>This is surely just the fragmented heap problem.

Possibly.  I believe PyMalloc doesn't have as much a problem in this
area, but off-hand I don't remember the extent to which strings use
PyMalloc.  Nevertheless, my bet is on holding references as the problem
with doubled memory use.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From bj_666 at gmx.net  Fri Mar 16 04:18:33 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 16 Mar 2007 09:18:33 +0100
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<7x6491k9t3.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.16.08.18.32.205449@gmx.net>

In <7x6491k9t3.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:

> "n00m" <n00m at narod.ru> writes:
>> h = collections.defaultdict(itertools.repeat(0).next)
> 
> Something wrong with 
>    h = collections.defaultdict(int)
> ?????

According to a post by Raymond Hettinger it's faster to use that iterator
instead of `int`.

Ciao,
	Marc 'BlackJack' Rintsch


From kyosohma at gmail.com  Mon Mar 19 13:59:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 10:59:54 -0700
Subject: tracking memory usage
In-Reply-To: <45febb7f$1@nntp.zianet.com>
References: <45febb7f$1@nntp.zianet.com>
Message-ID: <1174327194.714032.327180@y66g2000hsf.googlegroups.com>

On Mar 19, 11:34 am, "Erik Johnson" <nob... at invalid.com> wrote:
>   Sort of two questions here:
>
>     The first is about the internal view: are there Python introspection
> functions that can be called such that a running script can keep tabs on how
> much memory is being used?
>
>     And the second is about using either os or system calls on Windows such
> that a Python script could get similar information about other processes
> (i.e., external)?
>
> Thanks,
> -ej

>From what I've found, it would seem that this is in development. See
the following:

http://svn.python.org/projects/python/branches/bcannon-sandboxing/PEP.txt

I also found a cool recipe for doing some of what you want, but it's
only been tested on Linux. You might be able to modify it for your
needs, if you don't mind delving into process ids:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/286222

Good luck!

Mike



From anil.jupiter9 at gmail.com  Sat Mar 10 10:36:21 2007
From: anil.jupiter9 at gmail.com (jupiter)
Date: 10 Mar 2007 07:36:21 -0800
Subject: Database module & multithreading
In-Reply-To: <mailman.4904.1173539770.32031.python-list@python.org>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
Message-ID: <1173540981.532013.29060@c51g2000cwc.googlegroups.com>

On Mar 10, 8:16 pm, Michael Bentley <rmc... at gmail.com> wrote:
> > Thanx for this pointer buddy! I have done my homework. Some Database
> > modules are not actively maintained some modules  does not work with
> > Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
> > it dosent allow me to use multi threading so which database module is
> > better in terms of multithreading
>
> Actually, I think sqlite3 just requires that each thread have its own  
> connection and cursor.

I tried this approach with

for each new thread
self.c1=sqlite3.connect('urls')
self.c=self.c1.cursor()
check condition
insert if true else ignore

but no success




From B.Ogryczak at gmail.com  Wed Mar 21 12:17:36 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 21 Mar 2007 09:17:36 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
In-Reply-To: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <1174493856.663144.236880@y80g2000hsf.googlegroups.com>

On Mar 21, 3:38 pm, "dmitrey" <open... at ukr.net> wrote:
> Hi all,
> I looked to the PEPs & didn't find a proposition to remove brackets &
> commas for to make Python func call syntax caml- or tcl- like: instead
> of
> result = myfun(param1, myfun2(param5, param8), param3)
> just make possible using
> result =  myfun param1 (myfun2 param5 param8) param3

How would you write "a = b(c())"?

In my opinion it'll make code extremely obfuscaded. The great thing
about Python, when comparing with eg. Perl or C, is that code is
readable, even if written by experienced hacker.




From attn.steven.kuo at gmail.com  Sun Mar 25 18:52:13 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 25 Mar 2007 15:52:13 -0700
Subject: call to function by text variable
In-Reply-To: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <1174863133.266803.33190@n59g2000hsh.googlegroups.com>

On Mar 25, 3:36 pm, "ianar?" <ian... at gmail.com> wrote:
> yeah the subject doesn't really make sense does it?
>
> anyway want I want to do is this:
> if n == 1:
>
>     self.operations.insert(pos, operations.Replace.Panel(self, main))
>
> elif n == 2:
>
>     self.operations.insert(pos, operations.ChangeCase.Panel(self,
> main))
>
> elif n == 3:
>
>     self.operations.insert(pos, operations.Move.Panel(self, main))
>
> As you can see all the different functions have the same variables, so
> it would be easier if I could just make a list and use that.
>


# Your list would contain the unbound functions:

unbound_funcs = [operations.Replace.Panel,
    operations.Change.Panel,
    operations.Move.Panel]


# and invocation would be:

self.operations.insert(pos, unbound_funcs[n - 1](self, main))


--
Hope this helps,
Steven




From richardjones at optushome.com.au  Sat Mar 24 20:15:43 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sun, 25 Mar 2007 10:15:43 +1000
Subject: Python Game Programming Challenge #4 -- theme voting has started!
Message-ID: <4605bf2f$0$9773$afc38c87@news.optusnet.com.au>

The next PyWeek game programming challenge starts next Sunday at 00:00UTC.
If you're interested, there's definitely still time to sign up to the
challenge.

   http://www.pyweek.org/

Theme voting has started. You may now log into (or sign up to ;) the PyWeek
website to lodge your vote for theme. The themes to choose from are:

  The only way is up 
  Underneath the radar 
  One way or another 
  Don't stop till you get enough 
  The final countdown 

Come along and join in the fun :)


   Richard



From skip at pobox.com  Mon Mar 19 19:15:37 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 19 Mar 2007 18:15:37 -0500
Subject: struct.pack returns nothing [3]
In-Reply-To: <20070319223241.GA21961@mail.lacordilleraandina.com.ar>
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
	<op.tpgixokfx6zn5v@gabriel2.softlabbsas.com.ar>
	<20070319223241.GA21961@mail.lacordilleraandina.com.ar>
Message-ID: <17919.6553.505727.249115@montanaro.dyndns.org>


    Andr?s> I'm using the example of the site
    Andr?s> http://docs.python.org/lib/module-struct.html : 

    Andr?s> import struct
    Andr?s> pack('hhl', 1, 2, 3)

    Andr?s> I should get:
    >>>> '\x00\x01\x00\x02\x00\x00\x00\x03'
    Andr?s> I get an empty line, a '\n': 
    >>>> 
    >>>> _

Try

    import struct
    struct.pack('hhl', 1, 2, 3)

or

    from struct import pack
    pack('hhl', 1, 2, 3)

instead.

Skip



From MonkeeSage at gmail.com  Mon Mar  5 17:38:09 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 14:38:09 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173131863.216300.109120@s48g2000cws.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
	<1173131863.216300.109120@s48g2000cws.googlegroups.com>
Message-ID: <1173134289.131921.110320@h3g2000cwc.googlegroups.com>

Adam,

Sounds like a nice idea to me. Pretty ingenious use of the zip/
bytecode headers and all too. Post a message when you release it
please.

Regards,
Jordan



From aahz at pythoncraft.com  Tue Mar 20 09:16:30 2007
From: aahz at pythoncraft.com (Aahz)
Date: 20 Mar 2007 06:16:30 -0700
Subject: Still the __new__ hell ...
References: <1174167360.522350@jubilee.claranet.pt>
	<568s5gF287c68U2@mid.individual.net>
	<mailman.5315.1174359956.32031.python-list@python.org>
	<1hv8x6v.1x0ceur1nnwi46N%aleax@mac.com>
Message-ID: <etomre$9sg$1@panix3.panix.com>

In article <1hv8x6v.1x0ceur1nnwi46N%aleax at mac.com>,
Alex Martelli <aleax at mac.com> wrote:
>Steve Holden <steve at holdenweb.com> wrote:
>> 
>> basestring is a *type*.
>> 
>>   >>> basestring
>> <type 'basestring'>
>> 
>> It's the base class of which both str and unicode are subclasses.
>
>I believe it used to be a tuple back in Python 2.2 (sorry, don't have a
>Python 2.2 installation to check this right now).

Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> basestring
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'basestring' is not defined
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  8 15:25:00 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 21:25:00 +0100
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173196128.443793.170900@t69g2000cwt.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<1173193691.204641.206600@s48g2000cws.googlegroups.com>
	<1173196128.443793.170900@t69g2000cwt.googlegroups.com>
Message-ID: <45f0690b$0$18256$426a74cc@news.free.fr>

Adam Atlas a ?crit :
> Doesn't seem to work. I guess zipimport doesn't support that by
> default... but if I remember correctly, Setuptools adds that. Maybe
> I'll take a look at how it does it (I think by extracting the .so to /
> tmp?) 

or to another known location, IIRC.

> and see how easy it would be to integrate it here.
> 


From codecraig at gmail.com  Fri Mar  9 15:45:54 2007
From: codecraig at gmail.com (abcd)
Date: 9 Mar 2007 12:45:54 -0800
Subject: How to Start a (thread?) and Leave
In-Reply-To: <1173472226.698504.147260@h3g2000cwc.googlegroups.com>
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
	<1173471925.876213.170820@j27g2000cwj.googlegroups.com>
	<1173472226.698504.147260@h3g2000cwc.googlegroups.com>
Message-ID: <1173473154.354891.97530@t69g2000cwt.googlegroups.com>

> But a thread leaves the script running until the thread exits, right?
> So the webpage would just keep saying "loading" at the bottom I think.
>
> -Greg

give it a shot.  if you spawn off a new thread your code should keep
executing while the thread does its work in the "background".



From john.pye at gmail.com  Wed Mar 21 02:12:45 2007
From: john.pye at gmail.com (John Pye)
Date: 20 Mar 2007 23:12:45 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5374.1174456615.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
Message-ID: <1174457565.500159.58060@n59g2000hsh.googlegroups.com>

On Mar 21, 4:49 pm, "Carl Douglas" <carl.doug... at gmail.com> wrote:
> 1) Rebuild Python with a different compiler/linker kit so it links to
> the same CRT as my project, in your case find a mingw built Python.dll
>
> 2) Rebuild [with MSVC]

OK, so let's say that I must support EXISTING installations of Python
2.4 on computers I have no control over. And let's say that I detest
MSVC and want to push on with MinGW at all costs. What then?

I read something about being using '-lmsvcrt71' or '-lmsvcrt' with
GCC...?

JP



From ptmcg at austin.rr.com  Thu Mar  1 02:13:40 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 28 Feb 2007 23:13:40 -0800
Subject: Reading csv files using SQL
In-Reply-To: <45e6731d$0$4786$4fafbaef@reader4.news.tin.it>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>
	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>
	<45e6731d$0$4786$4fafbaef@reader4.news.tin.it>
Message-ID: <1172733220.231503.302520@8g2000cwh.googlegroups.com>

On Mar 1, 12:30 am, Pablo was Paolo <n... at spam.it> wrote:
> Hi,
>
> Dennis Lee Bieber ha scritto:
>
> >    You could maybe use SQLite to load the CSV file and process in an
> > actual DBMS...
>
> Ok, this is the solution I'm using actually (with PostGres).
> My hope is to find a way to do the same thing without using a DBMS but
> working directly with the files.
>
> Thanks a lot,
> Paolo

Sqlite has an in-memory option, so that you can read in your csv, then
load into actual tables.

sqlite is really lightweight, you are using postgres now but sqlite in-
memory will get you a lot further than writing your own SQL processor.

-- Paul



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  9 05:51:53 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 Mar 2007 11:51:53 +0100
Subject: Python in a Nutshell v2.5 shortcomings (was: Python books?)
References: <mailman.4836.1173410475.32031.python-list@python.org>
	<1huohke.qr9btd1mo633vN%aleax@mac.com>
Message-ID: <55cshjF23meg4U3@mid.individual.net>

Alex Martelli wrote:

> I do know that the 2nd edition of Python in a Nutshell tries to do
> so, but falls quite a bit short on a number of important new
> additions to the library

Which, if I may ask?

Regards,


Bj?rn

-- 
BOFH excuse #221:

The mainframe needs to rest.  It's getting old, you know.



From sri1025 at gmail.com  Thu Mar  8 00:37:51 2007
From: sri1025 at gmail.com (Srikanth)
Date: 7 Mar 2007 21:37:51 -0800
Subject: Problem with Packages
Message-ID: <1173332271.733596.159790@p10g2000cwp.googlegroups.com>

Hi,

I am learning about Python packages and I am getting an ImportError
but I can't figure out the reason why.

I have three modules and they are stored in a directory hierarchy as:

my_apps
|
|--> mod3.py
|--> dir1/dir1_1/mod1.py
|--> dir2/dir2_2/mod2.py

mod1.py defines a function called add(num1, num2) and mod2.py defines
a function called multiply(num1, num2) and mod3.py makes use of the
two functions defined in mod1.py and mod2.py and mod3.py's contents is
as follows:

-----------------------------------------------
from dir1.dir1_1 import mod1
from dir2.dir2_2 import mod2

def main():
	print mod1.add(10, 34)
	print mod2.multiply(3, 6)

if __name__ == "__main__":
	main()
----------------------------------------------

And the directory my_apps is included in PYTHONPATH environment
variable, what am I doing wrong? I executed this code under PyDev and
it's working perfectly but when I run it outside of PyDev, it fails.

This is command I used to execute mod3.py:

C:\> python C:\my_apps\mod3.py

But I get the following error:
Traceback (most recent call last):
  File "c:\my_apps\mod3.py", line 1, in ?
    from dir1.dir1_1 import mod1
ImportError: No module named dir1.dir1_1

Thanks,
Srikanth



From m_tayseer82 at yahoo.com  Sun Mar 18 12:21:49 2007
From: m_tayseer82 at yahoo.com (Mohammad Tayseer)
Date: Sun, 18 Mar 2007 09:21:49 -0700 (PDT)
Subject: encoding - arabic(IBM 864)  to UNICODE
In-Reply-To: <1174221139.794726.224860@o5g2000hsb.googlegroups.com>
Message-ID: <45636.13215.qm@web31107.mail.mud.yahoo.com>

text_864 = "\xd1"
unicode_string = unicode(text_864, encoding="cp864") # cp864 = IBM 864

The above code is working with Python 2.4.

Unfortunately, it doesn't support IBM 420 & Nafitha. The mapping between IBM 864 and unicode is in Lib/encodings & the file is very simple. You can add your own easily, if you knew how to do the decoding first ;)




Mohammad Tayseer
http://spellcoder.com/blogs/tayseer

 
---------------------------------
Don't be flakey. Get Yahoo! Mail for Mobile and 
always stay connected to friends.
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From wojciech_mula at poczta.null.onet.pl.invalid  Sun Mar 25 18:48:19 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (=?ISO-8859-2?Q?Wojciech_Mu=B3a?=)
Date: Mon, 26 Mar 2007 00:48:19 +0200
Subject: call to function by text variable
In-Reply-To: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <eu6ufc$s0q$1@nemesis.news.tpi.pl>

ianar? wrote:
> like this:
> 
> 
> list = ["Replace", "ChangeCase", "Move"]
> textVariable = list[n]
> self.operations.insert(pos, operations.[textVariable].Panel(self,
> main))
> 
> Is something sort of like that possible?

Yes:

self.operations.insert(
	pos,
	getattr(operations, textVariable).Panel(self.main)
)


From lialie at gmail.com  Wed Mar 14 22:34:44 2007
From: lialie at gmail.com (lialie)
Date: Thu, 15 Mar 2007 10:34:44 +0800
Subject: Too slow to read an entire table from Microsoft Access
Message-ID: <45F8B0C4.1080503@gmail.com>

Hi, all:
I read a table with 4500 rows and 12 columns using win32com.client.
Reading and updating records are OK, but cost too much time.Especially
making a dict as line(***).
All follows done may take nearly 90s!
Is there any good idea? Thanks.

conn = win32com.client.Dispatch(r'ADODB.Connection')
DSN='Provider=Microsoft.Jet.OLEDB.4.0;Data
Source='+DB_FILE_PATH+';Persist Security Info=False;'
conn.Open(DSN)
record_set = win32com.client.Dispatch(r'ADODB.Recordset')
record_set.Open('[Detail]', conn, 1, 3)
record_set.MoveFirst()

while not record_set.EOF:
tmp = ((record_set.Fields(i).Name, record_set.Fields.Item(i).Value)
for i in range(record_set.Fields.count))
print dict(tmp)
-----------------------------------------------------------------(***)
record_set.MoveNext()




From starGaming at gmail.com  Wed Mar 21 15:41:47 2007
From: starGaming at gmail.com (starGaming at gmail.com)
Date: 21 Mar 2007 12:41:47 -0700
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <slrnf020uo.on2.jon+usenet@snowy.squish.net>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
Message-ID: <1174506107.863399.7970@l75g2000hse.googlegroups.com>

On Mar 21, 11:07 am, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> In article <etpcon$1g8... at ulysses.news.tiscali.de>, Stargaming wrote:
> > from sys import version_info
> > if version_info[0] < 2 or version_info[1] < 4:
> >      raise RuntimeError("You need at least python2.4 to run this script")
>
> That'll fail when the major version number is increased (i.e. Python 3.0).
>
> You want:
>
>   if sys.hexversion < 0x020400f0:
>     ... error ...

Yes, it was intended to be and 'and' instead of an 'or'.



From sickcodemonkey at gmail.com  Thu Mar 15 23:10:35 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Thu, 15 Mar 2007 23:10:35 -0400
Subject: Python Eggs on Cygwin
In-Reply-To: <1174005208.972118.104860@l77g2000hsb.googlegroups.com>
References: <1174005208.972118.104860@l77g2000hsb.googlegroups.com>
Message-ID: <2adc542f0703152010k3801ec5er631e96460a1279cd@mail.gmail.com>

Just by looking at the "permission denied" error, when you loaded the
MySQLdb module, were you using a specific user (is it owned by a specific
user)?


On 15 Mar 2007 17:33:29 -0700, nisimura at gmail.com <nisimura at gmail.com>
wrote:
>
> Hi,
>
> I'm trying to use MySQL Python module on Cygwin.  Since there is no
> binary package, I compiled MySQL C client library and Python module
> (http://sourceforge.net/projects/mysql-python) manually.
>
> But when I was trying to load MySQLdb module, following errors
> happened.
>
> >>> import MySQLdb
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "build/bdist.cygwin-1.5.22-i686/egg/MySQLdb/__init__.py", line
> 19, in ?
>   File "build/bdist.cygwin-1.5.22-i686/egg/_mysql.py", line 7, in ?
>   File "build/bdist.cygwin-1.5.22-i686/egg/_mysql.py", line 6, in
> __bootstrap__
> ImportError: Permission denied
>
> This seems to be Eggs/Cygwin problem.  Is there any solution?
>
> Regards,
>
> --
> Kazu Nisimura
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From Stuart.Taylor at disney.com  Fri Mar 16 06:27:48 2007
From: Stuart.Taylor at disney.com (Taylor, Stuart)
Date: Fri, 16 Mar 2007 06:27:48 -0400
Subject: Readline()
In-Reply-To: <1E3F89921C854A49B8307B9716633F0105A516C1@SM-GBLO-XM32.emea.wdpr.disney.com>
Message-ID: <1E3F89921C854A49B8307B9716633F0105A516C4@SM-GBLO-XM32.emea.wdpr.disney.com>

for anyone who gets this same problem i managed to resolve the issue
using two threads.
The main program spawned a subprocess and used readlines to read the
output. The process spawned was a script which executes a command using
a thread. The thread reads the output from this command using readline.
Within the main loop of the script there is a while loop which checks
when the last output from the command was and if the time elapsed is
greater than timeout the script prints to the stdout a string called
timeout.
In the main program the readline compares every output to see if it
matches this sting. if it does kill process :)
 
I'm sure this code could be implemented better but it works and got me
out of a hole
 
heres the thread script which contains the thread class and the time out
loop:
 
import datetime
import time
import threading
import subprocess
import os
import sys
class outputThread(threading.Thread):
    """
    Thread is used to print the output of a command to the stdout
    """
    def __init__(self,threadCommand, name="thread", *args, **kwargs):
        threading.Thread.__init__(self, *args, **kwargs)
        self.name       = name
        self.killed     = 0
        self.counter    = 0
        self.command    = threadCommand
        self.retval     = None
        self.Set_Hit()
    def run(self):
        self.Proc       = subprocess.Popen(self.command, cwd =
os.getcwd(),stdin=subprocess.PIPE, stdout = subprocess.PIPE, stderr =
subprocess.STDOUT)
        self.retval     = None
        self.Set_Hit()
        while self.retval == None and not self.killed:   
            line = self.Proc.stdout.readline()
            print line.rstrip("\r\n")
            sys.stdout.flush()
            self.Set_Hit()
            self.retval=self.Proc.poll()
    def Set_Hit(self):
        self.last_time = datetime.datetime.now()      
    def Get_Hit(self):
        return self.last_time    
            
if __name__ == "__main__":
    """
    This script is designed to put a timeout loop over a thread.
    The intention of this thread is to perform a command and have a
timer loop over
    checking for the last text ouput from the command.
    If the loop exceeds the set time limit the command will stop reading
the output from the thread
    """
    command     = []
    timeout     = 5
    maxCounter  = timeout
    curCounter  = 0
    strCounter  = 0
    if len(sys.argv) > 2:
        try:
            timeout   = int(sys.argv[1])
        except:
            print "time out value is not a float"
            sys.exit(1)
        for argPos in range(2,len(sys.argv)):
            print "arg = %s" % sys.argv[argPos]
            command.append(sys.argv[argPos])
    else:
        print "not enough arguments"
        sys.exit(1)
    thread1 = outputThread(command,name="thread1")
    thread1.start()
    while True:
        if not thread1.retval == None:
            sys.exit(0)
        #Get current time and when timeout should occur
        currentTime     = datetime.datetime.now()            
        elapsedTime     = thread1.Get_Hit() +
datetime.timedelta(minutes=timeout)
        #Check Elapsed time
        if elapsedTime < currentTime:
            print "timed out"
            sys.stdout.flush()
            break                    
        time.sleep(1)    

________________________________

From: Taylor, Stuart [mailto:Stuart.Taylor at disney.com] 
Sent: 13 March 2007 09:50
To: Sick Monkey; Taylor, Stuart
Cc: python-list at python.org
Subject: RE: Readline()


i have a thread class which should read the output from the procedure
line by line and finish when the thread is set to kill:
 
class KillableThread(threading.Thread):
    def __init__(self, name="thread", *args, **kwargs):
        threading.Thread.__init__(self, *args, **kwargs)
        self.name = name
        self.killed = 0
    def kill(self):
        self.killed = 1
    def run(self):
        self.id = threading._get_ident()
        self.Proc      =
subprocess.Popen(["python","-tt","output_file.py"], cwd =
os.getcwd(),stdin=subprocess.PIPE, stdout = subprocess.PIPE, stderr =
subprocess.STDOUT)
        retval= None 
        while retval == None and not self.killed:
            line = self.Proc.stdout.readline()
            retval=self.Proc.poll()
 
to replicate my problem the output_file.py requires a user input. i ask
for a user input as my thread will sit waiting on
self.Proc.stdout.readline(). This is the point i want to have a timeout
or be able to end my thread as there is no output from the output_file. 
 
The main approch i cannot implement is to be able to kill the thread as
it remains hung on readlines()
 

________________________________

From: Sick Monkey [mailto:sickcodemonkey at gmail.com] 
Sent: 13 March 2007 01:51
To: Taylor, Stuart
Cc: python-list at python.org
Subject: Re: Readline()


Maybe if you show us your code we can better assist you.  

But maybe you can use a global variable or a try-catch method to keep
threads from staying alive and help better control your code.  


On 3/12/07, Taylor, Stuart <Stuart.Taylor at disney.com> wrote: 

	I have been working on running an external process using
subprocess.popen for a few days. 
	The process is ran over the network to another machine. 
	One thing I have found is that if I perform readline() on the
stdout it will hang if the process loses connection. 

	I have tried a few things in a test example: one is to use
stdin.write then stdin.flush() which send a string that readline() will
read and it ends correctly but doesn't work on the project I need it to
work on. Another is to try using threads and ignoar the thread when  the
process has lost connection but this still leaves the open thread alive
even when the main app has finished. 

	I am relatively new to python and I may be making a fundemantal
mistake in my implementation, can anyone please inform me of whether
sticking with subprocess.popen and readline() is the correct procedure
for this sort of task? 

	And if anyone can point me in the correct implementation of this
problem I would be gratefull. 


	Thank you 

	Stuart 


	--
	http://mail.python.org/mailman/listinfo/python-list
	


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From inyeol.lee at siliconimage.com  Tue Mar 13 11:43:02 2007
From: inyeol.lee at siliconimage.com (Inyeol Lee)
Date: Tue, 13 Mar 2007 08:43:02 -0700
Subject: Best place for a function?
In-Reply-To: <45f435db$0$16855$426a74cc@news.free.fr>
References: <f1aa6d810703071427g4735f009m579b807aa261fe49@mail.gmail.com>
	<mailman.4868.1173469085.32031.python-list@python.org>
	<45f435db$0$16855$426a74cc@news.free.fr>
Message-ID: <20070313154301.GA26206@siliconimage.com>

On Sun, Mar 11, 2007 at 06:36:02PM +0100, Bruno Desthuilliers wrote:
> Inyeol Lee a ?crit :
> > On Wed, Mar 07, 2007 at 05:27:04PM -0500, Sergio Correia wrote:
> > 
> >>I'm writing a class, where one of the methods is kinda complex. The
> >>method uses a function which I know for certain will not be used
> >>anywhere else. This function does not require anything from self, only
> >>the args passed by the method.
> >>
> >>Where should I put the function?
> > 
> > 
> > Use staticmethod. It's a normal function with class namespace.
> 
> What do you think the OP will gain from making a simple helper function 
> a staticmethod ? Apart from extra lookup time ?

Namespace.
Plz check this old thread. It explains some usage of staticmethod.
  http://mail.python.org/pipermail/python-list/2003-February/190258.html

--Inyeol


From jjlee at reportlab.com  Thu Mar  8 08:02:43 2007
From: jjlee at reportlab.com (John J. Lee)
Date: 08 Mar 2007 13:02:43 +0000
Subject: clientcookie/clientform and checking to see if a website accepted
	my login details
References: <1173085655.703034.10390@v33g2000cwv.googlegroups.com>
Message-ID: <uslcfdh1o.fsf@reportlab.com>

socialanxiety at gmail.com writes:

> alright, i'm coding a program that will log me into yahoo.com (so
> far), now, the problem i have is that once i've submitted by login &
> password, the program doesn't know whether yahoo.com accepted it.
> "
> response = ClientCookie.urlopen(form.click())
> "
> 
> now, when i get an error, the contents of 'response' will be
> different, ex: the contents of  '<title>example</title>' will be
> '<title>logged in!</title>'. is there any function that can search
> through the code for that text to check if i'm logged in or not?

There's no general way to find out (regardless of whether you're using
Python or something else).  So:

data = response.read()
logged_in = 'logged in!' in data
if logged_in:
    print "logged in OK"


John



From jan.m.danielsson at gmail.com  Sun Mar  4 13:15:30 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Sun, 04 Mar 2007 19:15:30 +0100
Subject: doxygen
Message-ID: <45eb0cc2$1@griseus.its.uu.se>

Hello all,

   I guess I should really be asking in some doxygen mailing list, but
since I believe that I found doxygen through this group, I assume that
there are some people here who can answer.

   When I run doxygen on my python files, it does document classes, but
not "standalone" functions. I.e.:

-----------------------
## Foobar class
#
# This is a test class!
class Foobar:

   ## Init
   #
   # This is the init function.
   def __init__(self):
      pass
-----------------------

   ... is included, but:

-----------------------
## Test
#
# This is a test function
def TestFunction(foo=None):
   pass
-----------------------

   ..is not.

   Is this by design? Is it possible to get doxygen to include
standalone functions?


-- 
Kind regards,
Jan Danielsson


From deets at nospam.web.de  Fri Mar  9 10:23:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 16:23:07 +0100
Subject: Creat a DLL File from python code,
	and use that DLL file in other Platform (Labview, Java .NET etc)
References: <1173441503.965228.95590@j27g2000cwj.googlegroups.com>
Message-ID: <55dcerF24n2e8U1@mid.uni-berlin.de>

macedo.silva at gmail.com wrote:

> Hi,
> 
> I would like to request your attention for this very specific issue:
> 
> I have several classes in Python, and now I want simply re-use it, in
> other language.
> 
> 
> The closest to solution I think I came was with this site:
>
http://www.py2exe.org/index.cgi/Py2exeAndCtypesComExeServer?highlight=%28%28Py2exeAndCtypesComDllServer%29%29
> but I not able to solve questions related with TLB files and
> __init__.py files.
> 
> So, could anyone give a tip about HOW TO CREAT a dll file from Python?

You might have success with 

http://elmer.sourceforge.net/

Diez


From deets at nospam.web.de  Fri Mar  9 11:11:21 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 17:11:21 +0100
Subject: opinion needed
References: <1173454035.316124.307620@h3g2000cwc.googlegroups.com>
Message-ID: <55df99F24658vU1@mid.uni-berlin.de>

azrael wrote:

> id like to hear your opinion about something.
> I just started using Prolog yesterday and i have my doubts about it,
> but it seems to me something like object oriented. so i wanted to ask
> you how usefull prolog is. Sure this is no prolog newsgroup so my
> question is: because it seems object oriented, how important is it by
> understanding python and improving my python skills. because i just
> started it, i may bee totaly wrong or i missunderstood.

OO? Prolog? Last time I checked it was much more functional if anything
else, good for searching solutions in problem-spaces via backtracking.
Certainly a concept one should get ones head wrapped around, if only to
have a new perspective.

No idea how you come to the conclusion it's OO though.

Diez


From gagsl-py2 at yahoo.com.ar  Sun Mar 11 07:50:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 08:50:40 -0300
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
	<2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>
	<slrnev6nob.oj9.jon+usenet@snowy.squish.net>
	<mailman.4930.1173605398.32031.python-list@python.org>
	<slrnev7o0j.ejv.jon+usenet@snowy.squish.net>
Message-ID: <op.to0wiqqdx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 07:55:15 -0300, Jon Ribbens  
<jon+usenet at unequivocal.co.uk> escribi?:

> In article <mailman.4930.1173605398.32031.python-list at python.org>,  
> Gabriel Genellina wrote:
>>> I don't know, but stock Python 2.5 seems to stick mysterious '.egg'
>>> files in the site-packages directory when you install things.
>>
>> Which "stock" Python? Not the one from www.python.org...
>
> Yes, the one from www.python.org.

Those .egg must come from other installed packages...

-- 
Gabriel Genellina



From inq1ltd at verizon.net  Tue Mar 20 20:26:33 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Tue, 20 Mar 2007 20:26:33 -0400
Subject: mysterious unicode
In-Reply-To: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
Message-ID: <200703202026.34160.inq1ltd@verizon.net>

On Tuesday 20 March 2007 18:35, Gerry wrote:
> I'm using pyExcelerator and xlrd to read and
> write data from and to two spreadsheets.
>
> I created the "read" spreadsheet by importing a
> text file - and I had no unicode aspirations.
>
> When I read a cell, it appears to be unicode
> u'Q1", say.
>
> I can try cleaning it, like this:
>
>
>     try:
>         s.encode("ascii", "replace")
>     except AttributeError:
>         pass
>
>
> which seems to work.  Here's the mysterious
> part (aside from why anything was unicode in
> the first place):
>
>                 print >> debug, "c=", col,
> "r=", row, "v=", value, "qno=", qno
>                 tuple = (qno, family)
>                 try:
>                     data[tuple].append(value)
>                 except:
>                     data[tuple] = [value]
>                 print >> debug, "!!!", col,
> row, qno, family, tuple, value, data[tuple]
>
> which produces:
>
> c= 1 r= 3 v= 4 qno= Q1
> !!! 1 3 Q1 O (u'Q1', 'O') 4 [1, u' ', 4]
>
> where qno seems to be a vanilla Q1, but a tuple
> using qno is (u'Q1', ...).
>
> Can somebody help me out?


I have been getting the same thing using SQLite3 
when extracting data fron an SQLite3 database.  I 
take the database info which is in a list and do

name = str.record[0]
rather than 
name = record[0]

So far, I havn't had any problems.
For some reason the unicode u is removed.
I havn't wanted to spend the time to figure out 
why.

jim-on-linux
http://www.inqvista.com






















From steve at REMOVE.THIS.cybersource.com.au  Thu Mar 29 01:17:00 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 29 Mar 2007 15:17:00 +1000
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<hzHOh.132157$_73.100417@newsread2.news.pas.earthlink.net>
Message-ID: <pan.2007.03.29.05.16.59.689308@REMOVE.THIS.cybersource.com.au>

On Thu, 29 Mar 2007 04:49:17 +0000, Dennis Lee Bieber wrote:

> On 28 Mar 2007 18:16:31 -0700, s99999999s2003 at yahoo.com declaimed the
> following in comp.lang.python:
> 
> 
>> what do you mean by create new object when using list comprehensoin or
>> list()? Does using slicing create a new object as well?
> 
> 	If the destination is a bare name, YES.
> 
> 	If the destination is a slice of a list, then one is merely
> replacing the contents in that slice, but leaving the other parts of the
> list in place.

Maybe so, but the slice doesn't know where it is being assigned to. It
still has to generate a new list object, which is then stored in the
appropriate part of the left-hand list object.

I suppose a sufficiently clever optimizing compiler might not do it
that way, but looking at some code with dis.dis() I'm pretty sure Python
does create the new list first.


-- 
Steven



From deets at nospam.web.de  Thu Mar  8 09:51:15 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 Mar 2007 15:51:15 +0100
Subject: Writing xml file from MS SQL
References: <1173364968.605132.252770@s48g2000cws.googlegroups.com>
Message-ID: <55am73F248suuU1@mid.uni-berlin.de>

Ros wrote:

> I am using pymssql for storing data into MS SQL. (I am using pymssql
> first time so dont know much about it)
> I wish to write/create XML file from database.
> There are few examples available for mysql but not much information
> about pymssql and MS SQL.
> 
> I have worked with cElementTree with SAX and I guess it can parse data
> in the most efficient manner if you compare it with other parsers. How
> can I use cElementTree to write xml file with the combination of
> pymssql(MS SQL) and pyxml.

1) read data from database
2) create XML-Nodes filled with this data
3) write XML-Nodes to disk
4) ....
5) Profit!

Diez


From sergio.correia at gmail.com  Wed Mar  7 18:20:29 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 7 Mar 2007 18:20:29 -0500
Subject: Best place for a function?
In-Reply-To: <1173308274.223424.14950@h3g2000cwc.googlegroups.com>
References: <mailman.4775.1173306427.32031.python-list@python.org>
	<558soiF23polgU1@mid.uni-berlin.de>
	<1173308274.223424.14950@h3g2000cwc.googlegroups.com>
Message-ID: <f1aa6d810703071520w2dc4c216yad7877a8cf401ebb@mail.gmail.com>

I also found out I can't use `unittest` with nested functions :-(

Thank you all for the responses,

Best,
Sergio

On 7 Mar 2007 14:57:54 -0800, bearophileHUGS at lycos.com
<bearophileHUGS at lycos.com> wrote:
> Diez B. Roggisch:
> > If it really has no other use as in this class, put it as an
> > instancemethod in there. Alternatively, you _could_ nest it like this:
>
> Using an instancemethod may be the most formally correct solution for
> that problem, but often nested function are the simpler solution. A
> downside of nested functions is that you can't give them a doctest (in
> a simple way).
>
> Bye,
> bearophile
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py2 at yahoo.com.ar  Sun Mar 18 05:47:01 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 Mar 2007 06:47:01 -0300
Subject: cannot start IDLE in WinXP
References: <1174129756.325715.22280@e1g2000hsg.googlegroups.com>
Message-ID: <op.tpdpgnq1x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 17 Mar 2007 08:09:16 -0300, imx <xiong.xu.cn at gmail.com> escribi?:

> Enviroment: WinXP sp2, python 2.5
> problem: click IDLE using shorcut menu or run phthonw.exe directly,
> nothing happen! But running python.exe from the command line is fine.

pythonw.exe does not open a window so it's almost invisible.
IDLE now uses a socket to connect to the subprocess which runs the python  
code; perhaps your firewall is blocking that connection. Try starting IDLE  
with the -n switch.

-- 
Gabriel Genellina



From mailmaverick666 at gmail.com  Tue Mar 20 06:18:40 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Tue, 20 Mar 2007 15:48:40 +0530
Subject: python & java
In-Reply-To: <20070320100600.19457.qmail@webmail92.rediffmail.com>
References: <20070320100600.19457.qmail@webmail92.rediffmail.com>
Message-ID: <180b672e0703200318m4ad29887q53df64961b206672@mail.gmail.com>

Jython is written in pure java.
You can use java classes inside python and also can use python classes
inside java
You can write applets too in python using jython.
It converts your python code in java code.


On 20 Mar 2007 10:06:00 -0000, sandeep patil <san_2012 at rediffmail.com>
wrote:
>
>   what diff betn python & jython
>
>
> On Tue, 20 Mar 2007 rishi pathak wrote :
>
> >See www.*jython*.org
> >
> >On 20 Mar 2007 02:23:07 -0700, sandeep patil <san_2012 at rediffmail.com>
> >wrote:
> >>
> >>hi
> >>
> >>i am fresher i python can any bady tell me who i will use python in
> >>web technologies in java base application.
> >>what it roll
> >>
> >>sandeep patil
> >>
> >>--
> >>http://mail.python.org/mailman/listinfo/python-list
> >>
> >
> >
> >
> >-- Regards--
> >Rishi Pathak
> >National PARAM Supercomputing Facility
> >Center for Development of Advanced Computing(C-DAC)
> >Pune University Campus,Ganesh Khind Road
> >Pune-Maharastra
>
>
>
> [image: Diageo]<http://adworks.rediff.com/cgi-bin/AdWorks/click.cgi/www.rediff.com/signature-home.htm/1050715198 at Middle5/1119380_1113690/1118605/1?PARTNER=3&OAS_QUERY=null+target=new+>




-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From Florian.Lindner at xgm.de  Mon Mar  5 15:13:03 2007
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Mon, 05 Mar 2007 21:13:03 +0100
Subject: Using string as file
Message-ID: <eshtk3$jat$1@news.in.tum.de>

Hello,
I have a function from a library thast expects a file object as argument.
How can I manage to give the function a string resp. have the text it would
have written to file object as a string?

Thanks,

Florian


From Emile.Boudreau at cognos.com  Fri Mar 30 08:54:08 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Fri, 30 Mar 2007 08:54:08 -0400
Subject: Sending emails to 3 addresses....
Message-ID: <09042D621CD4AA479C678463F3A646D0F08353@sottemail1.ent.ad.cognos.com>

Hello all, I'm trying to send a results email to 3 people. For some
reason only the first person in the list will receive the email but in
the received email it shows the 3 addresses. Here is my code, can
someone show me where I'm going wrong?? Thanks

sendMail('this is the subject line', 'the results: 71 fails, 229 pass,
300 total.', 'user1 at mycompany.com, user2 at mycompany.com,
user3 at mycompany.com')

def sendMail(subject, body, TO, FROM="machine at mycompany.com"):
    print TO
    HOST = "exchange.mycompany.com"
    BODY = string.join((
        "From: %s" % FROM,
        "To: %s" % TO,
        "Subject: %s" % subject,
        "",
        body
        ), "\r\n")
    server = smtplib.SMTP(HOST)
    server.sendmail(FROM, [TO], BODY)
    server.quit()

Emile Boudreau
 
     This message may contain privileged and/or confidential information.  If you have received this e-mail in error or are not the intended recipient, you may not use, copy, disseminate or distribute it; do not open any attachments, delete it immediately from your system and notify the sender promptly by e-mail that you have done so.  Thank you.
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From nanjundi at gmail.com  Mon Mar 26 15:32:46 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 26 Mar 2007 12:32:46 -0700
Subject: call to function by text variable
In-Reply-To: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <1174937566.897549.62400@e65g2000hsc.googlegroups.com>

On Mar 25, 6:36 pm, "ianar?" <ian... at gmail.com> wrote:
> yeah the subject doesn't really make sense does it?
>
> anyway want I want to do is this:
> if n == 1:
>
>     self.operations.insert(pos, operations.Replace.Panel(self, main))
>
> elif n == 2:
>
>     self.operations.insert(pos, operations.ChangeCase.Panel(self,
> main))
>
> elif n == 3:
>
>     self.operations.insert(pos, operations.Move.Panel(self, main))
>
> As you can see all the different functions have the same variables, so
> it would be easier if I could just make a list and use that.
>
> like this:
>
> list = ["Replace", "ChangeCase", "Move"]
> textVariable = list[n]
> self.operations.insert(pos, operations.[textVariable].Panel(self,
> main))

try this one:
textVariable = list[n-1]
exec( "self.operations.insert(pos, operations.%s.Panel(self, main))" %
textVariable )

Not sure if this is an elegant/right way.
-N





From arnodel at googlemail.com  Fri Mar  9 12:56:14 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 9 Mar 2007 09:56:14 -0800
Subject: Pb with descriptor and super ...
In-Reply-To: <esrg26$p6n$1@ellebore.extra.cea.fr>
References: <esr95l$n12$1@ellebore.extra.cea.fr>
	<mailman.4848.1173437283.32031.python-list@python.org>
	<esrg26$p6n$1@ellebore.extra.cea.fr>
Message-ID: <1173462974.511413.195980@30g2000cwc.googlegroups.com>

On Mar 9, 11:22 am, Erwan Adam <erwan.a... at cea.fr> wrote:
[snip]
>
> [adam at is111902 /home/adam/Work/Python]> python super_from_guido.py
> Using built-in super
> Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7bc302c>
> and typ is <class '__main__.B'>
> Using python Super
> Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7bc302c>
> and typ is None
> Using python MySuper
> Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7bc302c>
> and typ is <class '__main__.A'>

It seems to me that it is the built-in super which has the correct
behaviour.  When you write obj.attr, python calls  attr.__get__(obj,
type(obj)) and not attr.__get__(obj) which sets the second arg to
None. You can check this by creating a barebone descriptor that simply
prints its arguments:

class D(object):
    def __get__(self, obj, objtype):
        print obj, objtype

class A(object):
    d=D()

A().d
<__main__.A object at 0x133c5f0> <class '__main__.A'> # objtype is not
None!

Therefore in your case when you do super(B, b).attr then
A.__dict__['attr'].__get__(b, type(b)) is called. You can try this, it
should give the same output as builtin super.

> the Super gives None for typ ... which is quite surprising !
> In MySuper, I just change
>
>                      x = x.__get__(self.__obj__)
>
> by
>
>                      x = x.__get__(self.__obj__, cls)
> at the -3 :) line of the class ... and it gives the result I expected
> at the beginning : obj is b and typ is A !!!!

Neither of these are right I think. If my explanation above is right
the correct line should be:
                    x = x.__get__(self.__obj__, type(self.__obj__))

HTH

--
Arnaud



From steve at holdenweb.com  Thu Mar 22 21:14:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 21:14:30 -0400
Subject: Idiom for running compiled python scripts?
In-Reply-To: <pan.2007.03.23.01.01.15@mailinator.com>
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
Message-ID: <etv9o9$7fs$1@sea.gmane.org>

Mark wrote:
> So given the lack of response it seems that there is probably no such
> idiom and that I should not be concerned by the inefficiency inherent in
> running .py scripts directly?
> 
> I did some time tests and sure, the speed gain is slight, but it is a 
> gain none the less.

Someone already told you - compile the files manually (see the compile 
built-in function) and then use

   python file.pyc

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From arkanes at gmail.com  Mon Mar 12 22:32:41 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 12 Mar 2007 20:32:41 -0600
Subject: a better solution for GUI in python
In-Reply-To: <825ee$45f6018a$54d1d767$4649@news.chello.no>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
	<1173613976.277044.242160@8g2000cwh.googlegroups.com>
	<55iaceF24d6qgU2@mid.individual.net>
	<et0sjg$l8m$1@nemesis.news.tpi.pl>
	<mailman.4973.1173715040.32031.python-list@python.org>
	<825ee$45f6018a$54d1d767$4649@news.chello.no>
Message-ID: <4866bea60703121932w41802a75rec7e70ec338dff9e@mail.gmail.com>

On 3/12/07, David Boddie <david at boddie.org.uk> wrote:
> On Monday 12 March 2007 16:57, Chris Mellon wrote:
>
> > Gtk I consider an extremely poor contender as a cross platform
> > toolkit. The runtime is enormous and it makes little effort to appear
> > native on any non-GNOME platform.
>
> Given that wxPython more or less relies on GTK+ on Linux, I think
> you're probably shooting yourself in the foot here, particularly when
> you go on to say this:
>
> > wxPython is also a perfectly reasonable solution, especially if you
> > want a "native" seeming app on all platforms.
>
> All platforms would ideally include KDE, of course. ;-)
>

Granted, and something that I normally cover but forgot in this
thread. The preferred DE of your users is an important issue as well.
KDE users will be best (pretty much only, really) served by pyQt,
GNOME users by pyGTK or wxPython.


From lbates at websafe.com  Thu Mar 15 11:17:06 2007
From: lbates at websafe.com (Larry Bates)
Date: Thu, 15 Mar 2007 10:17:06 -0500
Subject: Multiline code - trailing slash usage
In-Reply-To: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
Message-ID: <45F96372.1010805@websafe.com>

abcd wrote:
> When do I need to use a trailing slash to separate code over multiple
> lines.
> 
> For example:
> 
> x = "hello world, this is my multiline " + \
>      "string!!!!"
> 
> x = {'name' : \
>       'bob'}
> 
> Do I need to use the "\" in the above examples?  When do i need to use
> it?
> 
You need to use it when your are not inside some context that makes it
clear to Python that there's more to the line:

You don't need it here because python knows you are inside a list (same is
true for tuple).

a=[1,
   2,
   3
  ]

Same for a dictionary:

a={'a1': 1,
   'a2': 2,
   'a3': 3
  }

Also when you are inside call list of a function

a=foo(a,"this is a very long string",
      arg3, arg4,
      kwarg1='one', kwarg2='two')

Python knows you aren't done because you haven't provided the closing
parenthesis.

I do this in list comprehensions also:

n=[(variable1, variable2) for variable1, variable2 in something
   if variable1.startswith('z')]

You do need it in your first example, but not in your second.

-Larry


From michael at jedimindworks.com  Sat Mar 24 05:44:12 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sat, 24 Mar 2007 04:44:12 -0500
Subject: execution speed increase after compile py code into exe?
In-Reply-To: <4604ebe7$0$28985$da0feed9@news.zen.co.uk>
References: <loom.20070324T091014-216@post.gmane.org>
	<mailman.5545.1174724953.32031.python-list@python.org>
	<4604ebe7$0$28985$da0feed9@news.zen.co.uk>
Message-ID: <B782FCFD-F2C1-4A8D-BD8C-F5DBC0A2CB36@jedimindworks.com>

>
> Actualy startup is faster for the apps that I have py2exe'd. I think
> this may be because all the modules are in one place and Python  
> doesn't
> have to go searching for them.

Thanks, Will!  That's good to know.


From johnjsal at NOSPAMgmail.com  Thu Mar 22 14:48:57 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 22 Mar 2007 14:48:57 -0400
Subject: Been a while...
In-Reply-To: <mailman.5466.1174580521.32031.python-list@python.org>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<mailman.5466.1174580521.32031.python-list@python.org>
Message-ID: <4602cf0c$0$29743$c3e8da3@news.astraweb.com>

Michael Bentley wrote:
> 
> On Mar 22, 2007, at 10:34 AM, John Salerno wrote:
> 
>> Hi guys. It's been a while since I've used Python, so I got a little
>> rusty, but I really want to start using it again, just out of habit and
>> for fun. Can anyone suggest a book or a website with little projects I
>> could work on to keep me busy?
> 
> http://www.pythonchallenge.com
> 
> 

Ugh, I gave up on that site a long time ago! :)


From duncan.booth at invalid.invalid  Thu Mar 22 12:17:16 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Mar 2007 16:17:16 GMT
Subject: Python 3000 idea: reversing the order of chained assignments
References: <Xns98FB8961DA528duncanbooth@127.0.0.1>
	<mailman.5463.1174577425.32031.python-list@python.org>
Message-ID: <Xns98FBA5B08E384duncanbooth@127.0.0.1>

Steve Holden <steve at holdenweb.com> wrote:



> In other words,
> 
> assignment_stmt       ::=       (target_list "=") expression_list |
>                                   (target_list "=") assignment_stmt
> 
> and
> 
> assignment_stmt       ::=       (target_list "=") assignment_stmt |
>                                   (target_list "=") expression_list
> 
> are entirely equivalent

I'm not quite sure what you are getting at. An assigment_stmt and an 
expression_list are not ambiguous so those two productions are identical 
(not just equivalent). Perhaps you are thinking of productions like:

    m_expr ::= u_expr | m_expr "*" u_expr  

which will match the same input, but could produce a different parser 
output than:

    m_expr ::= u_expr | u_expr "*" m_expr  


> I'm sure you understand that syntax only specifies what's legal, not how
> it should be interpreted.

I agree that the syntax does not mandate how it should be interpreted,
but it does lead to expectations.

If the expression_stmt is hidden from the outer assignment_stmt by an inner 
one then it is reasonable to expect that the inner production will be 
completely evaluated before the outer assignment happens. i.e. right to 
left.



From ramdaz at gmail.com  Wed Mar  7 14:23:52 2007
From: ramdaz at gmail.com (Ramdas)
Date: 7 Mar 2007 11:23:52 -0800
Subject: Any HTML to Latex module available in Python
Message-ID: <1173295432.212724.231240@n33g2000cwc.googlegroups.com>

Any HTML to Latex module available in Python which I can use to
convert HTML text to Latex

Ramdas



From mc_anjo at tamu.edu  Mon Mar 26 23:26:43 2007
From: mc_anjo at tamu.edu (Chris Smith)
Date: Mon, 26 Mar 2007 22:26:43 -0500
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174923080.941888.198340@p77g2000hsh.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>	<1174918286.213517.100190@l77g2000hsb.googlegroups.com>
	<1174923080.941888.198340@p77g2000hsh.googlegroups.com>
Message-ID: <eua2tk$cqq$1@sea.gmane.org>

Carl Banks wrote:
> On Mar 26, 10:11 am, "Andy Dingley" <ding... at codesmiths.com> wrote:
> 
>>On 26 Mar, 14:20, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
>>
>>
>>>what are the advantages of using Python for
>>>creating number crunching apps over Fortran??
>>
>>If you have to ask, you've not experienced enough Fortran to know its
>>sheer horror.
>>
>>You can write programs in Python that do usefully complicated things,
>>and you can get them to work in a reasonable time. Fortran can't do
>>this, for anything more than the trivial. "Classic" Fortran tasks of
>>the past are now seen as trivial. OK, so they did it to a lot of data,
>>but they really didn't do anything very complex to it.
> 
> 
> You couldn't be more incorrect.  I have run some very old (pre-Fortran
> 77) programs that are very far from trivial.
> 
> 
>>You can also write Python that other people can read and maintain. You
>>can't do this in Fortran, without a truly insane amount of trouble.
> 
> 
> This is a lie.  I've seen some Fortran code that was hellspawned, and
> some that was clear as glass.  The latter came about without a "truly
> insane amount of trouble".
> 
> 
>>As
>>Fortran programs have historically been authored and hacked on by
>>successive generations of grad students, this is the most vital
>>feature of all.
> 
> 
> Perhaps this is your impression because it's the only Fortran code
> you've ever been exposed to?
> 
> 
>>Finally we're no longer so interested in "number crunching". Number
>>crunching used to consist of simple operations over vast arrays of
>>data, although this was data with remarkably simple structure by
>>today's standards. These just aren't the major class of problems of
>>interest today.
> 
> 
> I suspect you're speaking from a narrow perspective, because "number
> crunching", as you define it, is still a problem of interest and
> heavily researched.  Maybe it's not in your field.  Anyways, you seem
> to be ignorant of the complexities of "simple operations over vast
> arrays", as if it you could accomplish these operations with a few
> lines of Python and numpy.  That might be true for your homework, but
> good number-crunching codes often did a lot of stuff under the covers.
> 
> 
Hear hear. Python and Fortran both have their place. I'm a grad student 
in Electromagnetics (radio frequency research) and I depend a lot on 
"number crunching" to help me design the latest and greatest rader array 
to the coolest cell phone that will connect anywhere. I actually use 
python to speed up my development of codes for Fortran. I prototype some 
function that I want in python and then use the final draft of it in my 
fortran code. What used to take several hours I can do in less than one 
by leveraging both languages for what they're good for, Python for RAD 
and Fortran for fast number crunching of my research.

Chris



From sylvain.thenault at logilab.fr  Thu Mar  1 04:01:54 2007
From: sylvain.thenault at logilab.fr (Sylvain =?iso-8859-1?Q?Th=E9nault?=)
Date: Thu, 1 Mar 2007 10:01:54 +0100
Subject: [ANN] pylint 0.13 / astng 0.17
Message-ID: <20070301090153.GC12447@crater.logilab.fr>

Hi there!

I'm very pleased to announce new releases of pylint (0.13) and its underlying
library astng (0.17). 

The PyLint release contains a bunch of bugs fixes, some new checks and command
line changes, and a new checker dedicated to Restricted Python checking. If this
doesn't sound familiar to you, visit the PyPy_ project web site for more
information.

The astng release contains a lot of inference fixes and enhancement, so even if
pylint should still works with the old version you're strongly encouraged to
upgrade.

.. _PyPy: http://codespeak.net/pypy/

What is pylint ?
----------------

Pylint is a python tool that checks if a module satisfy a coding
standard. Pylint can be seen as another pychecker since nearly all
tests you can do with pychecker can also be done with Pylint. But
Pylint offers some more features, like checking line-code's length,
checking if variable names are well-formed according to your coding
standard, or checking if declared interfaces are truly implemented,
and much more (see http://www.logilab.org/projects/pylint/ for the
complete check list). The big advantage with Pylint is that it is
highly configurable, customizable, and you can easily write a small
plugin to add a personal feature.

The usage it quite simple :

$ pylint mypackage.mymodule
        

This command will output all the errors and warnings related to the
tested code (here : mypackage.mymodule), will dump a little summary at
the end, and will give a mark to the tested code.

Pylint is free software distributed under the GNU Public Licence.


Home page
---------
http://www.logilab.org/project/name/pylint
http://www.logilab.org/project/name/logilab-astng

Download
--------
ftp://ftp.logilab.org/pub/pylint
ftp://ftp.logilab.org/pub/astng

Mailing list
------------
mailto://python-projects at logilab.org


Enjoy !
-- 
Sylvain Th?nault                               LOGILAB, Paris (France)
Formations Python, Zope, Plone, Debian:  http://www.logilab.fr/formations
D?veloppement logiciel sur mesure:       http://www.logilab.fr/services
Python et calcul scientifique:           http://www.logilab.fr/science



From fd0man at gmail.com  Fri Mar  9 20:11:26 2007
From: fd0man at gmail.com (Michael B. Trausch)
Date: Fri, 09 Mar 2007 20:11:26 -0500
Subject: UTF-8 output problems
Message-ID: <1173489086.5567.6.camel@pepper>

I am having a slight problem with UTF-8 output with Python.  I have the
following program:

x = 0

while x < 0x4000:
    print u"This is Unicode code point %d (0x%x): %s" % (x, x,
unichr(x))
    x += 1

This program works perfectly when run directly:

mbt at pepper:~/tmp$ python test.py
This is Unicode code point 0 (0x0):
This is Unicode code point 1 (0x1):
This is Unicode code point 2 (0x2):
This is Unicode code point 3 (0x3):
This is Unicode code point 4 (0x4):
This is Unicode code point 5 (0x5):
This is Unicode code point 6 (0x6):
This is Unicode code point 7 (0x7):
This is Unicode code point 8 (0x8):
This is Unicode code point 9 (0x9):
This is Unicode code point 10 (0xa):
(... continued)

However, when I attempt to redirect the output to a file:

mbt at pepper:~/tmp$ python test.py >f
Traceback (most recent call last):
  File "test.py", line 6, in <module>
    print u"This is Unicode code point %d (0x%x): %s" % (x, x,
unichr(x))
UnicodeEncodeError: 'ascii' codec can't encode character u'\x80' in
position 39: ordinal not in range(128)

This is slightly confusing to me.  The output goes all the way to the
end of the program when it is not redirected.  Why is Python treating
the situation differently when the output is redirected?  This failure
occurs for all redirection, by the way: >, >>, 1>2, pipes, and so forth.

Any ideas?

    ? Mike

--
Michael B. Trausch
                    fd0man at gmail.com
Phone: (404) 592-5746
                          Jabber IM:
                    fd0man at gmail.com
              fd0man at livejournal.com
Demand Freedom!  Use open and free protocols, standards, and software!
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From johnjsal at NOSPAMgmail.com  Mon Mar 19 10:13:15 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 Mar 2007 10:13:15 -0400
Subject: PythonCard thoughts
In-Reply-To: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
Message-ID: <45fe9b31$0$17946$c3e8da3@news.astraweb.com>

king kikapu wrote:

> The only "problem" i see with this design is that by that separation
> of Gui/Code, you loose the intellisense that (ex. PyDev) some editors/
> plugins can provide because in the .py file nothing is indicating
> that , for example, the btnDoWork is a Button object.
> This force you to remember many properties and switch back and forth
> between your code and the wxPython help file. This is not the case for
> wxGlade because all boilerplate code is in the same file (for good and
> for bad)

I don't know much about PythonCard or wxGlade, but I use wxPython (which 
wxGlade uses, right?) and you now have the option to separate your GUI 
and code using an XRC file (xml file that describes layout). So perhaps 
this is something you can do with wxGlade, but at the same time it might 
still create the problem you describe above. However, it's very to have 
your Python files contain just logic.


From max at alcyone.com  Wed Mar 21 15:30:12 2007
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 21 Mar 2007 12:30:12 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <56d2lrF28q269U1@mid.uni-berlin.de>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<56d2lrF28q269U1@mid.uni-berlin.de>
Message-ID: <uLOdnaJVfPRtGpzbnZ2dnUVZ_ubinZ2d@speakeasy.net>

Diez B. Roggisch wrote:

> dmitrey wrote:
> 
>> I looked to the PEPs & didn't find a proposition to remove brackets &
>> commas for to make Python func call syntax caml- or tcl- like: instead
>> of
>> result = myfun(param1, myfun2(param5, param8), param3)
>> just make possible using
>> result =  myfun param1 (myfun2 param5 param8) param3
>>
>> it would reduce length of code lines and make them more readable, + no
>> needs to write annoing charecters.
> 
> This is not true, there is no shorter code lines:
> 
> foo bar baz
> foo(bar,baz)
> 
> And the "more readable" part certainly depends on the habits of the user -
> to me, it's harder to read.

I agree.  Not to mention, the secondary stated goal of saving typing 
should be very, very low down on the list of priorities in programming 
language design.  Excessive and needless verbosity is one thing; but 
saving keystrokes for its own sake is not a priority and never should be.

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   I am not afraid / To be a lone Bohemian
    -- Lamya


From openopt at ukr.net  Wed Mar 21 10:55:08 2007
From: openopt at ukr.net (dmitrey)
Date: 21 Mar 2007 07:55:08 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
In-Reply-To: <1174488447.404840.112960@n76g2000hsh.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174488447.404840.112960@n76g2000hsh.googlegroups.com>
Message-ID: <1174488908.420851.303850@y66g2000hsf.googlegroups.com>

I think it should result
result = func1(func2, arg)
if you want
result = func1(func2(arg))
you should use
result = func1 (func2 arg)
if
... = word1 word2 word3 ...
then only word "word1" should be call to func "word1" with parameters
word2, word3 etc


> If you have
> result = func1 func2 arg
> is it
> result = func1(func2, arg)
> or
> result = func1(func2(arg))
>
> Miki <miki.teb... at gmail.com>http://pythonwise.blogspot.com




From kyosohma at gmail.com  Tue Mar 27 10:26:50 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 07:26:50 -0700
Subject: Use threads or Tkinter event loop?
In-Reply-To: <11624$4609251b$4275d90a$15349@FUSE.NET>
References: <ccd8f$460924a2$4275d90a$15349@FUSE.NET>
	<11624$4609251b$4275d90a$15349@FUSE.NET>
Message-ID: <1175005610.438509.37260@r56g2000hsd.googlegroups.com>

On Mar 27, 9:07 am, Kevin Walzer <k... at codebykevin.com> wrote:
> Kevin Walzer wrote:
> > I'm trying to decide whether I need threads in my Tkinter application or
> > not. My app is a front end to a command-line tool; it feeds commands to
> > the command-line program, then reads its output and displays it in a
> > Tkinter text widget. Some of the commands are long-running and/or return
> > thousands of lines of output.
>
> > I initially thought I needed to use threading, because the GUI would
> > block when reading the output, even when I configured the blocking to be
> > non-blocking. I got threading to work, but it seemed a bit complicated.
> > So, I decided to try something simpler, by using the Tkinter event loop
> > to force the output to update/display.
>
> > it seems to work well enough. Here is my threaded code:
>
> > non-threaded:
>
> > def insertDump(self):
> >  self.finkinstalled = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
> >         for line in self.finkinstalled:
> >             self.t.insert(END, line)
> >             self.update()
> >             self.t.see(END)
>
> > And here is my non-threaded code (needs two functions to work)
>
> >  def insertDump(self):
> >         try:
> >             data = self.dataQueue.get(block=False)
> >             for line in data:
> >                 self.t.insert(END, line)
> >                 self.t.see(END)
> >                 self.update()
>
> >         except:
> >             print "error"
> >             raise
>
> >     def getDump(self):
>
> >         self.file = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
> >         self.dataQueue.put(self.file)
>
> > This brings me to a design, as opposed to coding, question. The
> > non-threaded version seems to work just as well as the threaded one, in
> > terms of speed. Moreover, it is simpler to code and debug, because I
> > don't have to check to make sure the thread queue has data (I sometimes
> > get an 'Empty' error message when I first start the thread).  Simply
> > using the Tk event loop (self.update) is also how I would have coded
> > this in Tcl.
>
> > So my question is this: under what circumstances in Python are threads
> > considered "best practice"? Am I wrong to use the Tk event loop instead
> > of threads?
>
> D'oh, I got the code snippets mixed up:
>
> non-threaded:
>
> def insertDump(self):
>   self.finkinstalled = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
>          for line in self.finkinstalled:
>              self.t.insert(END, line)
>              self.update()
>              self.t.see(END)
>
> threaded:
>
>   def insertDump(self):
>          try:
>              data = self.dataQueue.get(block=False)
>              for line in data:
>                  self.t.insert(END, line)
>                  self.t.see(END)
>                  self.update()
>
>          except:
>              print "error"
>              raise
>
>      def getDump(self):
>
>          self.file = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
>          self.dataQueue.put(self.file)
>
> Sorry!
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

It looks like Tkinter is similar to wxPython in that you're not
supposed to use the mainloop for anything except the GUI and GUI
commands. The following websites have more info on Tkinter and
threads:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/82965
http://www.thescripts.com/forum/thread22536.html
http://forums.devshed.com/python-programming-11/tkinter-threads-123001.html

I use the Threading module for threading in wxPython. I think that
would probably serve you well with Tkinter as well. You can use the
join() method to wait for all the threads to exit.

Mike



From http  Sat Mar  3 17:44:25 2007
From: http (Paul Rubin)
Date: 03 Mar 2007 14:44:25 -0800
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<54q5lnF22aafrU1@mid.uni-berlin.de>
	<pan.2007.03.03.22.22.48.4257@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xk5xyt0ae.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> > Multi-Level-Specification allows you to 
> > express physical quantities with their respective unit, and operations 
> > on them to yield the combined unit at compile-time. There are some 
> > rather complicated cases where simple unification won't solve the 
> > type-equations, but then you might annotate things explicitly.
> Which is what Apps Hungarian _is_.

I think the idea is that the compiler can still check that your
annotations are correct, or at least consistent, even if it can't
solve the equations itself.  Hungarian notation is a variable naming
convention which can be followed manually but which the compiler makes
no attempt to enforce.

Diez, can you suggest any online references about MLS?


From edfialk at gmail.com  Wed Mar  7 18:05:54 2007
From: edfialk at gmail.com (edfialk)
Date: 7 Mar 2007 15:05:54 -0800
Subject: IronPython with Apache
Message-ID: <1173308754.051978.62500@v33g2000cwv.googlegroups.com>

Hi all, I'm completely new to Python, but fairly experienced in PHP
and few other languages.

Long story short: The IronPython executable doesn't work for .cgi
scripts in my browser.


I've been assigned to write a service that pulls in parameters from
the URL, accesses a file and serves some data through a CSV.  The only
problem I foresee myself is accessing and reading this file, which is
a 'hyper-cube' in that it has many dimensions of data.

Anyway, the code for reading and writing this cube was already written
by a coworker in IronPython and .NET.  Again, I'm totally new to
Python but as I'm stepping through trying to pick out pieces that I
need, I can't even import clr.

So, I'm told I need IronPython, which I get, and I replace the #!c:
\Python25\python.exe with the IronPython executable (#!c:
\IronPython-1.0.1\ipy.exe), but I get a 500 Internal Server error and:

"[Wed Mar 07 17:02:21 2007] [error] [client 127.0.0.1] malformed
header from script. Bad header=  File , line 0, in __import__:
testing.cgi" in the Error log.

Does anyone know how to set up this 'IronPython' through Apache so I
can use it to read/write data?

Any help would be greatly appreciated.
Thanks!
-Ed



From buzzard at urubu.freeserve.co.uk  Wed Mar 14 10:05:35 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Wed, 14 Mar 2007 14:05:35 +0000
Subject: number generator
In-Reply-To: <45f76346.0@entanet>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>	<55fbgjF2492skU1@mid.individual.net>	<1173573654.009953.266280@30g2000cwc.googlegroups.com>	<7xbqj01u9c.fsf@ruckus.brouhaha.com>	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
Message-ID: <45f807b0.0@entanet>

Duncan Smith wrote:
> greg wrote:
> 
>>Gabriel Genellina wrote:
>>
>>
>>>The 5th number is not "random".
>>
>>
>>More precisely, the fifth number is not *independent*
>>of the others. You can't have five independent random
>>numbers that sum to 50; only four independent numbers
>>plus a dependent one.
>>
>>-- 
>>Greg
> 
> 
> In the interests of precision, that should probably read "are
> constrained to sum to 50"; it's quite possible to generate a sequence of
> independent random variates that just happen to sum to 50 (as I'm sure
> you know).
> 
> A fairly efficient way of generating random multinomial variates (which
> would satisfy the OP's problem)

[snip]

That is, the OP's original problem (without the positivity constraint
added in a later post).

Duncan


From mahs at telcopartners.com  Thu Mar 22 14:35:52 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 22 Mar 2007 11:35:52 -0700
Subject: challenge ?
In-Reply-To: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
References: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
Message-ID: <etuiad$f21$1@sea.gmane.org>

alain wrote:
> I have a problem I wonder if it has been solved before.
> I have a dictionnary and I want the values in the dictionnary to be
> annotated with the rank that would be obtained by sorting the values
> 
> def annotate_with_rank(my_dict):
> 	....
> 	return my_annotated_dict
> 
> In other words, any value a_value would become a 2-tuple
> (a_value,rank_of_a_value)
> 
> I seek an elegant solution.
> 
> Alain
> 
  >>> d = dict(a=10, b=5, c=8, d=12)

  >>> dict((k, (v, rank)) for rank, (v, k) in
  ...     enumerate(sorted((v, k) for k, v in d.items())))
  {'a': (10, 2), 'c': (8, 1), 'b': (5, 0), 'd': (12, 3)}
  >>>

# sort by value, then by key since (v,k) must be unique


Michael



From superprad at gmail.com  Wed Mar 21 15:18:41 2007
From: superprad at gmail.com (PKKR)
Date: 21 Mar 2007 12:18:41 -0700
Subject: parsing combination strings
In-Reply-To: <mailman.5416.1174504434.32031.python-list@python.org>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
	<mailman.5416.1174504434.32031.python-list@python.org>
Message-ID: <1174504721.913698.178380@e1g2000hsg.googlegroups.com>

On Mar 21, 2:51 pm, "Steven D. Arnold" <stev... at neosynapse.net> wrote:
> On Mar 21, 2007, at 2:42 PM, PKKR wrote:
>
> > I need a fast and efficient way to parse a combination string(digits +
> > chars)
>
> > ex: s = "12ABA" or "1ACD" or "123CSD" etc
>
> > I want to parse the the above string such that i can grab only the
> > first digits and ignore the rest of the chacters,
>
> A regex leaps to mind.....have you investigated the "re" module?
>
>  >>> import re
>  >>> re.match(r'(\d+)', '123abc').group(1)
> '123'
>
> steven


yep thats what i tried as per tommy's advice and came up with:

re.split('[^0-9]', str)[0]

or is there a better way?



From supervau at gmail.com  Tue Mar 27 05:26:51 2007
From: supervau at gmail.com (Frank)
Date: 27 Mar 2007 02:26:51 -0700
Subject: plot dendrogram with python
Message-ID: <1174987611.314883.150410@y80g2000hsf.googlegroups.com>

Hi,

does anyone know if there is a way to plot a dendrogram with python.
Pylab or matplotlib do not provide such a function.

Thanks!

Frank



From nagle at animats.com  Fri Mar 30 12:00:17 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 30 Mar 2007 16:00:17 GMT
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <euik44$93e$1@online.de>
References: <euid24$ugc$1@online.de> <5741ueF2bgl92U1@mid.uni-berlin.de>
	<euik44$93e$1@online.de>
Message-ID: <luaPh.3297$YL5.2260@newssvr29.news.prodigy.net>

Max Kubierschky wrote:
> Diez B. Roggisch schrieb:
> 
>> Max Kubierschky schrieb:
>>
>>> Hello,
>>>
>>> I'm planning to give a game programming course for kids of mixed age.
>>> For this, I am looking for an open source 2D game development kit.
>>> I am also willing to participate in the development of the 
>>> development kit.
>>>
>>> Features I'd like to see
>>> - Possibility to construct simple games via drag and drop without 
>>> programming
>>> - Integration into an IDE
>>> - Based on Java or Python
>>> Pluses:
>>> - Good Tutorial
>>> - German documentation

     The Blender GameKit will do all that.

     You can do simple games without programming.
     There's a graphical integrated environment.
     Programs can be written in Python.
     There's a published book ("Blender GameKit")
     German documentation may be hard to come by, though.

					John Nagle


From gagsl-py2 at yahoo.com.ar  Mon Mar 19 18:18:50 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 19:18:50 -0300
Subject: Create TarFile using string buffers
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
Message-ID: <op.tpgixokfx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 Mar 2007 16:06:39 -0300, aurora00 at gmail.com  
<aurora00 at gmail.com> escribi?:

> I have a program that generates a number of files that will be
> packaged into a tarball. Can I stream the content into TarFile without
> first writing them out to the file system? All add(), addfile() and
> gettarinfo() seems to assume there is a file in the disk. But for me I
> seems inefficient to write all the content to the disk and then have
> it read back by the TarFile module.

You can create a TarInfo object directly, and use addfile with a StringIO  
object:

import tarfile
 from cStringIO import StringIO

data = "Some text, maybe containing\ntwo or more lines\n" + "The quick  
brown fox jumps over the lazy dog\n" * 20
fobj = StringIO(data)

tar = tarfile.open("sample.tar", "w")
tarinfo = tarfile.TarInfo("foo.txt")
tarinfo.size = len(data)
tar.addfile(tarinfo, fobj)
tar.close()

tar = tarfile.open("sample.tar", "r")
tar.list()
foo = tar.extractfile("foo.txt")
data_read = foo.read()
print "foo.txt:\n%s" % data_read
tar.close()
assert data == data_read


-- 
Gabriel Genellina



From nagle at animats.com  Sat Mar 10 12:47:39 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 10 Mar 2007 17:47:39 GMT
Subject: pylint: don't warn about tabs
In-Reply-To: <mailman.4825.1173393048.32031.python-list@python.org>
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4825.1173393048.32031.python-list@python.org>
Message-ID: <%aCIh.6552$M65.4331@newssvr21.news.prodigy.net>

Gabriel Genellina wrote:
> En Thu, 08 Mar 2007 14:33:38 -0300, Bjoern Schliessmann  
> <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> escribi?:
> 
>> Alan Isaac wrote:
>>
>>> As a tab user, I want the tabs warning turned off.
>>
>>
>> Advice: Don't. IIRC it's planned in future Python versions that TABs
>> aren't supported for indentation.
> 
> 
> AFAIK, using tabs xor spaces will be ok, but not MIXING them.

     That's what should be enforced.  For any module, whitespace
at the beginnings of lines should be all spaces or all tabs.
Both are unambiguous and can be mechanically converted to each
other. But if spaces and tabs are mixed, there's ambiguity.

					John Nagle


From rdiaz02 at gmail.com  Mon Mar 26 11:31:51 2007
From: rdiaz02 at gmail.com (Ramon Diaz-Uriarte)
Date: Mon, 26 Mar 2007 17:31:51 +0200
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <624934630703260831o404709f3pc77ed3867f616fd3@mail.gmail.com>

On 26 Mar 2007 06:20:32 -0700, Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:
> OK...
> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??
> Thanks
> Chris
>

Dear Chris,

Why are you focusing on Python vs. Fortran? There might be other
choices out there you might want to consider, specifically C, O'Caml,
and Ada, since you mention number crunching. When choosing, you should
consider what other requirements you'll have; some people have hinted
at a few, such as portability (I am not saying fortrain ain't
portable) and rapid application development. Will you be doing lots of
string manipulation? Processing text-files? Gluing applications? What
do people around you use? What type of number crunching will you be
doing? Are the libraries available in any of the languages that you
are considering that do some/most of what you want to do? Are you
concernded about concurrent/distributed programming? Is this your
first programming language? Etc, etc, etc. In the end, maybe neither
Python nor Fortran might be the best choices for you.

HTH,

R.





> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Ramon Diaz-Uriarte
Statistical Computing Team
Structural Biology and Biocomputing Programme
Spanish National Cancer Centre (CNIO)
http://ligarto.org/rdiaz


From paul at boddie.org.uk  Thu Mar 22 07:31:41 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 22 Mar 2007 04:31:41 -0700
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
Message-ID: <1174563101.470315.280940@n59g2000hsh.googlegroups.com>

On 22 Mar, 10:21, "Godzilla" <godzillais... at gmail.com> wrote:
>
> I cannot find a solution for my problem with inserting a blob object
> (>4000 in length) into an ORACLE database via ODBC.

This brings back "happy" memories with Oracle 9i and JDBC.

> I have tried the two ways of inserting the blob object (a zip file):
>
> 1)
> fp = open("c:/test/test.zip", "r+b")
> data = fp.read()
> s = odbc.odbc(cs)
> qry = s.cursor()
> qry.execute("Insert into tBlob (data) values ('%s')" %
> data.encode('hex'))
>
> return the error: Input String Too Long Limit: 4096
>
> 2)
> qry.execute("Insert into tBlob (data) values (?)",
> data.encode('hex'))
>
> does not return error, but it does not insert the record correctly.
>
> Any help will be fully appreciated...

If I recall correctly, JDBC provided an API to stream the contents
into the column. That is, you needed to provide an instance of one of
the mutually incompatible Java stream classes (I don't remember which
one) when setting the value, and then the database would suck up the
contents. It's quite possible that a similar mechanism involving file-
like objects exists in the different Python modules for Oracle,
although I haven't checked.

Paul



From markbpan at mailinator.com  Thu Mar 22 21:01:15 2007
From: markbpan at mailinator.com (Mark)
Date: 23 Mar 2007 01:01:15 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
Message-ID: <pan.2007.03.23.01.01.15@mailinator.com>

So given the lack of response it seems that there is probably no such
idiom and that I should not be concerned by the inefficiency inherent in
running .py scripts directly?

I did some time tests and sure, the speed gain is slight, but it is a 
gain none the less.


From tgrav at mac.com  Tue Mar  6 05:57:43 2007
From: tgrav at mac.com (Tommy Grav)
Date: Tue, 6 Mar 2007 05:57:43 -0500
Subject: Good handling of input data (was Re: Newbie question)
In-Reply-To: <45EC579A.8090602@websafe.com>
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<45EC579A.8090602@websafe.com>
Message-ID: <D47C45DB-7EFD-44CD-B201-CB6E7F6C1FA3@mac.com>


On Mar 5, 2007, at 12:47 PM, Larry Bates wrote:

> Tommy Grav wrote:
>> Hi list,
>>
>>    this is somewhat of a newbie question that has irritated me for  
>> a while.
>> I have a file test.txt:
>>
>> 0.3434  0.5322 0.3345
>> 1.3435  2.3345 5.3433
>>
>> and this script
>> lines = open("test.txt","r").readlines()
>> for line in lines:
>>    (xin,yin,zin) = line.split()
>>    x = float(xin)
>>    y = float(yin)
>>    z = float(zin)
>>
>> Is there a way to go from line.split() to x,y,z as floats without
>> converting
>> each variable individually?
>>
>> Cheers
>>    Tommy
>
>
> Using a list comprehension you would write this as:
>
> for line in lines:
>     xin, yin, zin=[float(x) for x in line.split()]
>
> This if course expects your data to be perfect.  If
> you want error handling (e.g. less or more than 3 values,
> values that cause exception when passed to float, etc.)
> you will have to handle that differently.

Thanks for the great response.

So how would you handle this type of error handling?
My main problem is that occasionally there is an entry
in the list that is a string:

0.9834 134.4933 78.009 run11 27

Again I would like to avoid having to individually parse the 3 floats,
while still easily handling the string, but a list comprehension will
not work as far as I can tell. Is there a module that handles this
type of flat ascii tables? Something like:

(x,y,z,id,n) = ParseFile("float","float","float","string","int")

would be great, and I guess

(x,y,z,id,n) = PaseFile2("%f %f %f %s %d")

would be even better.

Cheers
   Tommy





From david at boddie.org.uk  Sat Mar 24 19:20:42 2007
From: david at boddie.org.uk (David Boddie)
Date: Sun, 25 Mar 2007 00:20:42 +0100
Subject: qt ver. 3, linux, windows, and modal forms
References: <4605a174$0$5225$4c368faf@roadrunner.com>
Message-ID: <cc780$4605b24b$54d1d767$32358@news.chello.no>

On Saturday 24 March 2007 23:08, Mike wrote:

> I'm having a problem with modal forms on windows. I've written a very
> short test program, with a main window and a form called from the main
> window. The form is set to modal with form.setModal(1) before calling
> form.show().

Is form an instance of a QWidget subclass or a QDialog subclass?

Have you tried calling form.exec_loop() instead of form.show()?

> All works as expected on Linux. The form is modal, not allowing the main
> window to received the focus. If I call the form from within itself, the
> topmost form is modal, and not of the previous forms will receive the
> focus until the topmost form is closed; then the next topmost is modal,
> and so on.

This sounds like the desired behaviour.

> However, on Windows XP Pro (at work - don't use windows at home), the
> form is not modal. The main window will receive the focus with a mouse
> click even though the modal form is still on top.

But this should show the same behaviour. I suspect that the use of show()
rather than exec_loop() leads to the platform-specific behaviour you are
seeing.

> The source code is identical on both OS's.
> 
> Has anyone run into this before? Is there a fix? I haven't been able to
> find anything with google searches, and Trolltech's forums don't seem to
> have any entries addressing the problem, either.
> 
> I have a progam that I'm writing for work using Qt and Python, which was
> like pulling teeth with our Microsoft oriented IT department, and I very
> much do not want to tell them that it's not going to work (modal forms
> are essential).

Modal forms are quite commonplace, so they should work as you expect. If you
above advice doesn't help, you'll need to supply some more information about
the versions of Qt, PyQt, SIP and Python you are using.

David


From rterala at gmail.com  Thu Mar  8 16:21:24 2007
From: rterala at gmail.com (Ravi Terala)
Date: Thu, 08 Mar 2007 13:21:24 -0800
Subject: implementing SFTP using Python
In-Reply-To: <683868.19200.qm@web38806.mail.mud.yahoo.com>
References: <683868.19200.qm@web38806.mail.mud.yahoo.com>
Message-ID: <45F07E54.1070502@gmail.com>

Kiran,

You should look into Twisted Python and their Twisted Python Conch 
package. You might not need to reinvent the wheel.
http://twistedmatrix.com/trac/wiki/TwistedConch

Ravi

kadarla kiran kumar wrote:
> Hi Everybody,
>  
> I have to implement SFTP conection from client to the server using 
> Python script.
> Iam very new new to python , and i dont't have much time to complete 
> this. So I need some pointers from you.
>  
> If anybody has already done this kind of stuff, please let me know. 
> Please don't think Iam over ambitious, but i need some kind of Pseudo 
> code ,if possible source code.
>  
> Thanks in Advance,
> K.Kiran Kumar
> 
> ------------------------------------------------------------------------
> Never Miss an Email
> Stay connected with Yahoo! Mail on your mobile. Get started! 
> <http://us.rd.yahoo.com/evt=43909/*http://mobile.yahoo.com/services?promote=mail> 
> 
> 



From gagsl-py2 at yahoo.com.ar  Wed Mar 14 18:27:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 Mar 2007 19:27:55 -0300
Subject: question about class methods
References: <et9o1i$qfi$1@ruby.cit.cornell.edu>
Message-ID: <op.to690tsmx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 18:04:00 -0300, Darren Dale <dd55 at cornell.edu>  
escribi?:

> I've run across some code in a class method that I don't understand:
>
>     def example(self, val=0)
>         if val and not self:
>             if self._exp < 0 and self._exp >= -6:

0) "Normal" methods are not class methods, but instance methods. A class  
method is a method who operates on the class itself; its first argument is  
the class (maybe a derived one).

> I am unfamiliar with some concepts here:
>
> 1) Under what circumstances would "if not self" be True?

"if not self" would be "if self evaluates to False as a boolean": 0, 0.0,  
0j, (), [], {}... Other objects usually evaluate always to True, except if  
they define some special methods: __nonzero__ and __len__. Look those on  
the Python Reference Manual.

> 2) If "not self" is True, how can self have attributes?

Perhaps you think of self being None - that should never occur unless you  
called the method in some convoluted way.
The class migh inherit from list, by example, and you want to compute the  
average:

class StatList(list):
     def avg(self):
         if self: return sum(self)/len(self)
         else: raise ValueError("Can't compute average on empty list")

> (This is slightly simplified code from the decimal.Decimal.__str__  
> method,
> line 826 in python-2.4.4)

A Decimal number is False when 0. `if not self` is a faster way to say `if  
self==0`

-- 
Gabriel Genellina



From downloadpda at gmail.com  Fri Mar 23 06:46:46 2007
From: downloadpda at gmail.com (downloadpda at gmail.com)
Date: 23 Mar 2007 03:46:46 -0700
Subject: $1 download the newest pda software
Message-ID: <1174646806.028002.65970@d57g2000hsg.googlegroups.com>

Want access to 15000+ all the new pda applications? just $1
register for one account  to download/buy applications in this site.
http://handpedia.vicp.cc/

this is one-time email, thank your reading.



From joncle at googlemail.com  Fri Mar 16 05:02:06 2007
From: joncle at googlemail.com (Jon Clements)
Date: 16 Mar 2007 02:02:06 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
Message-ID: <1174035726.525608.3340@e1g2000hsg.googlegroups.com>

On 16 Mar, 03:56, "hiro" <Nun... at gmail.com> wrote:
> Hi there,
>
> I'm very new to python, the problem I need to solve is whats the "best/
> simplest/cleanest" way to read in multiple files (ascii), do stuff to
> them, and write them out(ascii).
>
> --
> import os
>
> filePath = ('O:/spam/eggs/')
> for file in os.listdir(filePath):   #straight from docs
>     # iterate the function through all the files in the directory
>     # write results to separate files  <- this is where I'm mostly
> stuck.
>
> --
> For clarity's sake, the file naming conventions for the files I'm
> reading from are file.1.txt -> file.nth.txt
>
> It's been a long day, i'm at my wits end, so I apologize in advance if
> I'm not making much sense here.
> syntax would also be great if you can share some recipes.

I'd try the glob module.

[code]
import glob

# Get a list of filenames matching wildcard criteria
# (note that path is relative to working directory of program)
matching_file_list = glob.glob('O:/spam/eggs/*.txt')

# For each file that matches, open it and process it in some way...
for filename in matching_file_list:
    infile = file(filename)
    outfile = file(filename + '.out','w')
    # Process the input file line by line...
    for line in infile:
        pass # Do something more useful here, change line and write to
outfile?
    # Be explicit with file closures
    outfile.close()
    infile.close()
[/code]

Of course, you can change the wild card criteria in the glob
statement, and also then filter further using regular expressions to
choose only files matching more specific criteria. This should be
enough to get you started though.

hth

Jon.










From jgodoy at gmail.com  Sat Mar 10 11:28:42 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 10 Mar 2007 13:28:42 -0300
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<1hur0ah.tbqxgzjmqcwmN%aleax@mac.com>
	<1173542369.216188.223200@p10g2000cwp.googlegroups.com>
Message-ID: <87ird9kqpx.fsf@gmail.com>

"jupiter" <anil.jupiter9 at gmail.com> writes:

> conn = psycopg2.connect("dbname=test user=test")
>
> Traceback (most recent call last):
>   File "<pyshell#8>", line 1, in <module>
>     conn = psycopg2.connect("dbname=test user=test")
> OperationalError: could not connect to server: Connection refused
> (0x0000274D/10061)
> 	Is the server running on host "???" and accepting
> 	TCP/IP connections on port 5432?
>
> this is the error I am getting with psycopg2 I want to access a local
> file

PostgreSQL is a server, it access the files.  You talk to the RDBMS server.
Is it running?  Is it accepting connections from your host?

-- 
Jorge Godoy      <jgodoy at gmail.com>


From fabiofz at gmail.com  Mon Mar 12 13:27:31 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 12 Mar 2007 14:27:31 -0300
Subject: Pydev 1.3.0 Released
Message-ID: <cfb578b20703121027w175e5166l1068b63364673e35@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.0 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Find References: Ctrl+Shift+G can be used to find the references to the
selected token in the editor
* Fix: Code-analysis: Fixed false positive for statement with no effect


Release Highlights in Pydev:
----------------------------------------------

* Code-completion: Deep analysis for discovering arguments in constructs
'from imports' now can be configured given the number of chars of the
qualifier
* Refactoring for override methods: changed so that it uses the pydev
code-completion engine for getting the hierarchy and methods
* Fix: Python Nature Restore: begin rule does not match outer scope rule
fixed
* Fix: Package Explorer: if show-in is in a deep structure, it will show it
is the 1st try and not only in the 2nd
* Fix: Package Explorer: some intercepts removed elements incorrectly, and
ended up messing the navigator and search (which has 'null' elements because
of that)


What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and Jython
development -- making Eclipse a first class Python IDE -- It comes with many
goodies such as code completion, syntax highlighting, syntax analysis,
refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com
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From facundo at taniquetil.com.ar  Tue Mar 27 08:39:41 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Tue, 27 Mar 2007 12:39:41 +0000 (UTC)
Subject: shutil.copy Problem
References: <mailman.5648.1174965082.32031.python-list@python.org>
	<1174970535.061022.141230@l77g2000hsb.googlegroups.com>
	<BAY105-DAV16498BE4BF3A127F6369E9956E0@phx.gbl>
Message-ID: <eub3ac$ce2$1@sea.gmane.org>

David Nicolson wrote:

> Thanks, but it's definitely not the print. In original the code the  
> print statements are replaced by a call to a log method.
>
> Besides, the exception would be different if it was thrown outside of  
> the try block.

The best you can do is take the piece of code that has the problem, show
it to us, and then copy the traceback.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From jgodoy at gmail.com  Sun Mar 18 07:19:18 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 18 Mar 2007 08:19:18 -0300
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
	<1174158002.730076.22720@y80g2000hsf.googlegroups.com>
	<1174166115.263201.51840@d57g2000hsg.googlegroups.com>
	<1174189566.189546.85510@y80g2000hsf.googlegroups.com>
	<1174190073.112097.29160@l75g2000hse.googlegroups.com>
Message-ID: <877ite3ikp.fsf@gmail.com>

"n00m" <n00m at narod.ru> writes:

> my dial-up line's too slow for downloading 4mb of shedskin-0.0.20.exe

<joke>
Don't worry!  We can email it to you. :-D
</joke>

-- 
Jorge Godoy      <jgodoy at gmail.com>


From timr at probo.com  Mon Mar 19 23:56:22 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 20 Mar 2007 03:56:22 GMT
Subject: fifo queue
References: <1174257160.540073.113380@b75g2000hsg.googlegroups.com>
Message-ID: <gqmuv21crtp3bht09qqcka0p8f1djjtpuf@4ax.com>

"drochom" <drochom at googlemail.com> wrote:
>
>how would u improve this code?

I would add at least one comment...
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  8 17:47:22 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 23:47:22 +0100
Subject: What is the best way to upgrade python?
In-Reply-To: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
Message-ID: <45f08a69$0$3223$426a74cc@news.free.fr>

yinglcs at gmail.com a ?crit :
> Hi,
> 
> i am using red hat enterprise 4. It has python 2.3 installed. What is
> the best way to upgrade to python 2.4?
> 
> I think one way is to compile python 2.4 from the source, but I can't
> remove the old one since when i do 'rpm -e python', i get error like
> 'failed dependencies'.

Not really a python-related problem by itself, but anyway: you probably 
have other packages depending on this version of Python, so better to 
keep it. Now nothing prevents you from having multiple Python versions. 
Just build from sources (preferably giving /usr/local as prefix to 
./configure since it's not the 'system' version), and install in a 
different location (IIRC there's a make altinstall rule - anyway all 
this is documented in the source directory).



From manstey at csu.edu.au  Tue Mar  6 17:45:45 2007
From: manstey at csu.edu.au (manstey)
Date: 6 Mar 2007 14:45:45 -0800
Subject: is it possible to give an instance a value?
Message-ID: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>

Hi,

My question probably reflects my misunderstanding of python objects,
but I would still like to know the answer.

The question is, is it possible for an instnace to have a value (say a
string, or integer) that can interact with other datatypes and be
passed as an argument?

The following code of course gives an error:

class Test(object):
     def __init__(self, val):
           self.val = val

>>> a = Test('hello')
>>> a.val  + ' happy'
'hello happy'
>>> a + 'happy'
TypeError: unsupported operand type(s) for +: 'Test' and 'str'

Is there a way to make a have the value a.val when it is used as
above, or as an argument (eg function(a, 10, 'sdf') etc)?

The only fudge I discovered for simple addition was to add to the
class

   def __add__(self, obj):
       return a.val + obj

but this doesn't solve the problem in general. I have tried
subclassing the string type, but as it is immutable, this is not
flexible the way a.val is (i.e. it can't e reassigned and remain a
subclass).

Any pointers, or is my question wrong-headed?

btw, my motivation is wanting to mimic another oo language which
allows this, so it allows:

>>>Person.Address
'Sydney'
>>>Person.Address.type
'%String'
>>>Person.Address = 'Canberra'
>>>print Person.Address. Person.Address.type
Canberra %String

etc.

We have had to implement Person.Address as Person.Address.val, making
Address an instance with .val, .type, etc.



From skip at pobox.com  Wed Mar 21 12:17:37 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 21 Mar 2007 11:17:37 -0500
Subject: Garbage collection
In-Reply-To: <etrj61$euc$1@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
Message-ID: <17921.23201.912536.584770@montanaro.dyndns.org>


    Tom> True, but why does Python hang on to the memory at all?  As I
    Tom> understand it, it's keeping a big lump of memory on the int free
    Tom> list in order to make future allocations of large numbers of
    Tom> integers faster.  If that memory is about to be paged out, then
    Tom> surely future allocations of integers will be *slower*, as the
    Tom> system will have to:

    Tom> 1) page out something to make room for the new integers
    Tom> 2) page in the relevant chunk of the int free list
    Tom> 3) zero all of this memory and do any other formatting required by
    Tom>    Python 

If your program's behavior is:

    * allocate a list of 1e7 ints
    * delete that list

how does the Python interpreter know your next bit of execution won't be to
repeat the allocation?  In addition, checking to see that an arena in the
free list can be freed is itself not a free operation.  From the comments at
the top of intobject.c:

   free_list is a singly-linked list of available PyIntObjects, linked
   via abuse of their ob_type members.

Each time an int is allocated, the free list is checked to see if it's got a
spare object lying about sloughin off.  If so, it is plucked from the list
and reinitialized appropriately.  If not, a new block of memory sufficient
to hold about 250 ints is grabbed via a call to malloc, which *might* have
to grab more memory from the OS.  Once that block is allocated, it's strung
together into a free list via the above ob_type slot abuse.  Then the 250 or
so items are handed out one-by-one as needed and stitched back into the free
list as they are freed.

Now consider how difficult it is to decide if that block of 250 or so
objects is all unused so that we can free() it.  We have to walk through the
list and check to see if that chunk is in the free list.  That's complicated
by the fact that the ref count fields aren't initialized to zero until a
particular chunk is first used as an allocated int object and would have to
be to support this block free operation (=> more cost up front).  Still,
assume we can semi-efficiently determine that a particular block is composed
of all freed int-object-sized chunks.  We will then unstitch it from the
chain of blocks and call free() to free it.  Still, we are left with the
behavior of the operating system's malloc/free implementation.  It probably
won't sbrk() the block back to the OS, so after all that work your process
still holds the memory.

Okay, so malloc/free won't work.  We could boost the block size up to the
size of a page and use mmap() to map a page into memory.  I suspect that
would become still more complicated to implement, and the block size being
probably about eight times larger than the current block size would incur
even more cost to determine if it was full of nothing but freed objects.

    Tom> If Python freed (most of) the memory when it had finished with it,
    Tom> then all the system would have to do is:

That's the rub.  Figuring out when it is truly "finished" with the memory.

    Tom> Surely Python should free the memory if it's not been used for a
    Tom> certain amount of time (say a few seconds), as allocation times are
    Tom> not going to be the limiting factor if it's gone unused for that
    Tom> long.

This is generally the point in such discussions where I respond with
something like, "patches cheerfully accepted". ;-) If you're interested in
digging into this, have a look at the free list implementation in
Objects/intobject.c.  It might make for a good Google Summer of Code
project:

    http://code.google.com/soc/psf/open.html
    http://code.google.com/soc/psf/about.html

but I'm not the guy you want mentoring such a project.  There are a lot of
people who understand the ins and outs of Python's memory allocation code
much better than I do.

    Tom> I've also tested similar situations on Python under Windows XP, and
    Tom> it shows the same behaviour, so I think this is a Python and/or
    Tom> GCC/libc issue, rather than an OS issue (assuming Python for linux
    Tom> and Python for windows are both compiled with GCC).

Sure, my apologies.  The malloc/free implementation is strictly speaking not
part of the operating system.  I tend to mentally lump them together because
it's uncommon for people to use a malloc/free implementation different than
the one delivered with their computer.

Skip


From researchbase at gmail.com  Thu Mar 29 01:55:38 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 29 Mar 2007 11:25:38 +0530
Subject: newbi question on python rpc server, how it works?
In-Reply-To: <gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>
References: <mailman.5720.1175107122.32031.python-list@python.org>
	<gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>
Message-ID: <f81479dd0703282255x5671b898s288e41a4e90f58f6@mail.gmail.com>

hello all,
I have downloaded the entire twisted library.
I am also trying to read the documentation but I have a couple of
problems right now.
firstly, I did not find any thing in twisted documentation that
specifically talks about xml rpc.  am I missing some thing?
secondly, if I am writing an entire application with its logic in an
xml rpc server, do I have to create all my classes as instences of xml
rpc server (just like I create a java servlet or a php script)?  or is
it that I just create one xml rpc server class which is like the entri
point for all other classes in the package?
can you provide a couple of links to howtos or tutorials on creating
xml rpc servers and clients  with twisted python?  I am also confused
as to how will I mix the functionality of MySQLDB with twisted python?
I am asking this because I felt twisted much cleaner to use than the
modules coming with python itself.  again I may be wrong and some one
might point me to the possible problems with this aproach in the long
run.
regards.
Krishnakant.


From tommy.nordgren at comhem.se  Thu Mar  8 22:06:06 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Fri, 9 Mar 2007 04:06:06 +0100
Subject: Python books?
Message-ID: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>

Could some kind soul please recommend a few text books on Python 2.5
and it's class library?

----
Kine dies, Kinfolk dies, and thus at last yourself
This I know that never dies, how a dead mans deeds are deemed. --  
Elder edda
Tommy Nordgren
tommy.nordgren at comhem.se





From piet at cs.uu.nl  Tue Mar 20 07:10:24 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Tue, 20 Mar 2007 12:10:24 +0100
Subject: Displaying EPS in a GUI
References: <1174072162.659381.75700@o5g2000hsb.googlegroups.com>
Message-ID: <m2mz28jhlr.fsf@cochabamba.cs.uu.nl>

>>>>> virtk0s at gmail.com (V) wrote:

>V> Does anybody know of a good way to display Encapsulated Postscript
>V> images in a GUI? I'm currently using wx, but would be perfectly
>V> willing to switch to another binding to keep the program from becoming
>V> hackish.

You need e Postscript interpreter, e.g. Ghostscript.
If you have Ghostscript installed PIL can read EPS images. Then they can be
converted to wx images:
http://wiki.wxpython.org/index.cgi/WorkingWithImages
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From steve at holdenweb.com  Mon Mar 12 23:05:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 12 Mar 2007 23:05:49 -0400
Subject: Interface in IronPython
In-Reply-To: <45f5cc7e$0$27190$426a74cc@news.free.fr>
References: <1173734174.730471.149680@j27g2000cwj.googlegroups.com>
	<45f5cc7e$0$27190$426a74cc@news.free.fr>
Message-ID: <et54he$62k$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> edfialk a ?crit :
>> Hi all, I'm pretty much totally new to IronPython and have come to the
>> point that I need an interface to interact with a co-worker's code,
>> but I can't seem to find any documents or discussion on syntax for
>> writing an interface.
>>
>> Does anyone know of a link that talks about interfaces in IronPython
>> or feel like explaining one too me? :)
>>
>> Any advice would be greatly appreciated.
> 
> My best advice would be to repost your question here:
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
> 
That's good advice, but I hope it won't be taken to mean that IronPython 
questions aren't welcome here too. I would have expected many readers to
be familiar with the fuzzyman's techie blog, in which he's recently been 
describing his experiences building Windows/.NET interfaces with IronPython.

Start at

   http://www.voidspace.org.uk/ironpython/index.shtml

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From memcached at aol.com  Mon Mar 12 08:41:50 2007
From: memcached at aol.com (memcached at aol.com)
Date: Mon, 12 Mar 2007 08:41:50 -0400
Subject: mod_python's mechanism
Message-ID: <8C932BAF0EA83B2-13B8-89F2@WEBMAIL-MB21.sysops.aol.com>

Hello,
I'm just curious that does mod_python have the same or similiar mechanism comparing to mod_perl?
Thanks!
________________________________________________________________________
AOL now offers free email to everyone.  Find out more about what's free from AOL at AOL.com.
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From http  Fri Mar 23 12:31:23 2007
From: http (Paul Rubin)
Date: 23 Mar 2007 08:31:23 -0800
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<slrnf07k5r.3nr.grahn+nntp@frailea.sa.invalid>
Message-ID: <7xejnfdiqs.fsf@ruckus.brouhaha.com>

Jorgen Grahn <grahn+nntp at snipabacken.dyndns.org> writes:
> Wikipedia should have some guideline for referencing Usenet postings,
> somewhere ...

It has one (WP:RS).  The guideline is don't do it.  The problem is
that these guidelines arise out of disputes, i.e. maybe someone tried
to use a Usenet post to prove something about a politician, and the
result (reasonably) was a guideline that said Usenet posts weren't
reliable sources of info.  In the cases where it's something ok, the
editors use common sense and leave it alone.  Until that bot got loose
and started removing all Usenet links whether they were ok or not.


From jstroud at mbi.ucla.edu  Sat Mar  3 03:03:04 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 03 Mar 2007 08:03:04 GMT
Subject: classes and functions
In-Reply-To: <mailman.4613.1172874373.32031.python-list@python.org>
References: <mailman.4613.1172874373.32031.python-list@python.org>
Message-ID: <YY9Gh.4432$M65.105@newssvr21.news.prodigy.net>

Silver Rock wrote:
> Friends,
> 
> I don?t see why using classes.. functions does everything already. I
> read the Rossum tutotial and two other already.
> 
> Maybe this is because I am only writing small scripts, or some more
> serious misunderstandings of the language.
> 
> Please give me a light.
> 
> thanks guys,
> Claire

Attempt to code a gui.

James


From mail at microcorp.co.za  Sun Mar  4 03:10:56 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 4 Mar 2007 10:10:56 +0200
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org><1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<1huevy2.1431m651a0okjjN%aleax@mac.com>
Message-ID: <00bc01c75e34$a343fa40$03000080@hendrik>

 "Alex Martelli" <aleax at mac.com> wrote:

> Raymond Hettinger <python at rcn.com> wrote:
>    ...
> > The notion that "pop" is only defined for stack operations is somewhat
> > pedantic.
> 
> Worse: it's totally wrong.  It's also defined for eyes, as a musical
> genre, as a kind of soda, as an avant-garde artistic movement of the
> '50s, for baloons, as a parent of the male persuasion, for email
> reading, and moreover it's often used to refer to Persistent Organic
> Pollutants or Points Of Presence -- not forgetting weasels, either.
> 
One should never forget the pawning of weasels.

Then there is the contrary meaning - instead of "take out" it can 
mean "put in" - Just pop it in the oven, there's a dear...

- Hendrik



From XX.XmcX at XX.XmclaveauX.com  Fri Mar 30 08:14:32 2007
From: XX.XmcX at XX.XmclaveauX.com (MC)
Date: Fri, 30 Mar 2007 14:14:32 +0200
Subject: Object Oriented Database with interface for Pyhton
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
	<1175247009.786698.72390@l77g2000hsb.googlegroups.com>
	<460ce036$0$1390$426a74cc@news.free.fr>
Message-ID: <mn.f3567d73834c7f3d.46195@XX.XmclaveauX.com>

Salut!

Heureusement qu'il y a qq fran?ais pour faire un peu de m?nage...

-- 
@-salutations

Michel Claveau




From bdesth.quelquechose at free.quelquepart.fr  Tue Mar  6 13:16:15 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 19:16:15 +0100
Subject: Project organization and import
In-Reply-To: <555jv6F2314bbU1@mid.uni-berlin.de>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
	<45ed41f7$0$21515$426a74cc@news.free.fr>
	<1173198244.092412.17400@n33g2000cwc.googlegroups.com>
	<555jv6F2314bbU1@mid.uni-berlin.de>
Message-ID: <45eda7ef$0$32279$426a34cc@news.free.fr>

Diez B. Roggisch a ?crit :
>>I'd like to point out something though. More than one of the people
>>who responded have implied that I am bringing my prior-language
>>mindset to Python, even suggesting that my brain isn't built for
>>Python. ;) In fact I think it's the other way around. I am struggling
>>to take full advantage of the fact that Python is an interpreted
>>language, to use Python in the most "Pythonic" way. You guys are
>>telling me that's broken and I should go back to a workflow that is
>>identical in spirit, and not necessarily any faster than I would use
>>with a compiled language. While that might be the right answer in
>>practice, I don't feel like it's a particularly "good" answer, and it
>>confirms my initial impression that Python package management is
>>broken.
>>
>>I think you should be asking yourselves, "Did we all abandon reload()
>>because it is actually an inferior workflow, or just because it's
>>totally broken in Python?"
> 
> 
> Sorry, but I fail to see the point of your argumentation.
> 
> Reloading a module means that you obviously have some editor open you code
> your module in, and an interactive interpreter running where you somehow
> have to make the 
> 
> reload(module)
> 
> line (re-)appear, and then most probably (unless the pure reloading itself
> triggers some testing code) some other line that e.g. instantiates a class
> defined in "module"
> 
> Now how exactly does that differ from having a test.py file containing
> 
> import module
> <do-something>
> 
> and a commandline sitting there with a 
> 
> python test.py

Actually, make it
python -i test.py

Then you have test.py executed, and your interactive interpreter up and 
ready in the desired state.


From nagle at animats.com  Sat Mar 17 03:12:30 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 17 Mar 2007 07:12:30 GMT
Subject: Mastering Python
In-Reply-To: <1hv3735.f8r5bx3czob7N%aleax@mac.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<T9AKh.13297$tD2.11703@newsread1.news.pas.earthlink.net>
	<1hv3735.f8r5bx3czob7N%aleax@mac.com>
Message-ID: <yxMKh.8126$M65.601@newssvr21.news.prodigy.net>

Alex Martelli wrote:
> Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> 
> 
>>>need to catch up quickly and master Python programming.How do you
>>
>>Mastery and quickly are opposing terms <G> Took me 15 years on a job
>>using FORTRAN 77 and I still wouldn't have called myself a master. (I'm
>>more of a JoAT)
> 
> 
> My favorite "Stars!" PRT, mind you -- but when some language interests
> me enough, I do tend to "master" it... guess it's correlated with what
> Brooks saw as the ideal "language lawyer" in his "surgical team"
> approach, an intrinsic fascination with bunches of interconnected rules.

    Python just isn't that complicated.  The syntax is straightforward,
and the semantics are similar to most other dynamic object-oriented languages.
If you know Perl or Smalltalk or LISP or JavaScript, Python does about
what you'd expect.

	Execution model: dynamic stack-type interpreter.
	Memory model: reference counting with backup garbage collector.
	Syntax:	roughly C-like, with indentation for structure.
	Typing model: dynamic only
	Object model: class definitions with multiple inheritance.
	Object structure: dictionary hash.
	Exception model: explicit throw/try/catch
	Theading model: multiprogramming in interpreter.
	Safe memory model: Yes.
	Closures: Yes.
	Design by contract: No.

That's Python.

    Biggest headache is finding out what doesn't work in the libraries.

				John Nagle


From jjl at pobox.com  Sat Mar 10 16:20:31 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 10 Mar 2007 21:20:31 GMT
Subject: IronPython with Apache
References: <1173308754.051978.62500@v33g2000cwv.googlegroups.com>
Message-ID: <871wjw7q3f.fsf@pobox.com>

"edfialk" <edfialk at gmail.com> writes:
[...]
> So, I'm told I need IronPython, which I get, and I replace the #!c:
> \Python25\python.exe with the IronPython executable (#!c:
> \IronPython-1.0.1\ipy.exe), but I get a 500 Internal Server error and:
> 
> "[Wed Mar 07 17:02:21 2007] [error] [client 127.0.0.1] malformed
> header from script. Bad header=  File , line 0, in __import__:
> testing.cgi" in the Error log.
[...]

Looks odd.  Try the IronPython mailing list?

Or try this:

http://www.microsoft.com/downloads/details.aspx?FamilyId=55932211-0D7E-4C6E-9B18-8F9D2AC1EE43&displaylang=en


John


From tgrav at mac.com  Thu Mar 22 17:00:19 2007
From: tgrav at mac.com (Tommy Grav)
Date: Thu, 22 Mar 2007 17:00:19 -0400
Subject: Upgrading python question
Message-ID: <3AD132C2-B09B-4FF9-AA86-928DE171B634@mac.com>

I am currently using Activepython 2.4.4, but would like to upgrade to
2.5. Am I right in thinking that if I do that I need to reinstall all  
the
packages and modules (like numpy, scipy, pyfits, and so on)? Or is
there a way to avoid that?

Cheers
   Tommy


From http  Wed Mar 21 16:39:11 2007
From: http (Paul Rubin)
Date: 21 Mar 2007 12:39:11 -0800
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
Message-ID: <7xtzwee3gw.fsf@ruckus.brouhaha.com>

"Paddy" <paddy3118 at googlemail.com> writes:
> I just had a link to Tim peters first post on doctest:
> http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> removed from http://en.wikipedia.org/wiki/Doctest as it doesn't fit
> their guidelines for external links.

Just sit tight for a while.  It looks like someone went a bit
overboard removing those links with a bot, and is now in the process
of putting them back.


From siona at chiark.greenend.org.uk  Fri Mar 16 07:56:05 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 16 Mar 2007 11:56:05 +0000 (GMT)
Subject: Using wildcards with Popen in the Subprocess module
References: <mailman.5150.1173995866.32031.python-list@python.org>
Message-ID: <vHu*1fQFr@news.chiark.greenend.org.uk>

William Hudspeth  <wbhk at unm.edu> wrote:
> [ ... ] I need to pass multiple filenames to an
>executable. The filenames are similar to one another, but differ only
>slightly, hence the use of the wildcard. The executable works well from
>the command line if I pass in a wildcard filename, but Popen can't
>expand the wildcard.
>
>>From command line:
>% command /path_to_files/filename*.doc
>
>With Popen:
>var1="/path_to_files/filnames*.doc"
>result=Popen(["command",var1]).wait()

You want:

result = Popen(["command", var1], shell=True).wait()

See the subprocess docs on using Popen instead of "older functions"
(especially os.system): http://docs.python.org/lib/node534.html .
You might also want a look at subprocess.call() .

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From mail at microcorp.co.za  Mon Mar 12 01:26:45 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Mon, 12 Mar 2007 07:26:45 +0200
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com><12v3ksihos7uj7a@corp.supernews.com><1173477047.467568.298090@p10g2000cwp.googlegroups.com><2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com><1173488215.913014.130190@h3g2000cwc.googlegroups.com><mailman.4896.1173517512.32031.python-list@python.org>
	<12v8vk7sabb2i84@corp.supernews.com>
Message-ID: <011101c76467$074f6000$03000080@hendrik>

"Grant Edwards" <g...te at visi.com> wrote:


> On 2007-03-10, Hendrik van Rooyen <m..l at microcorp.co.za> wrote:
> ><isr...elr at googlemail.com> wrote:
> >
> >> Oh, thanks for the advice then. And as for Grant..look forward to
> >> seeing more of your posts.
> >
> > YOW! - some recognition at last!
> 
> :)
> 
> I see somebody pays attention to sigs -- which, BTW, are old quotes
> from the Zippy the Pinhead comic strip. www.zippythepinhead.com
> 

Thanks for that - I was wondering where you got hold of the skewed
thinking which I enjoy reading so much.

- Hendrik



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 17:41:51 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 07 Mar 2007 23:41:51 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <mailman.4770.1173303931.32031.python-list@python.org>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>	<45EF260C.6000205@websafe.com>	<45ef2e12$0$28891$426a74cc@news.free.fr>
	<mailman.4770.1173303931.32031.python-list@python.org>
Message-ID: <45ef37a6$0$7504$426a74cc@news.free.fr>

Gabriel Genellina a ?crit :
> En Wed, 07 Mar 2007 19:00:59 -0300, Bruno Desthuilliers  
> <bdesth.quelquechose at free.quelquepart.fr> escribi?:
> 
>> this kind of cose is exactly what OO polymorphic dispatch is supposed to
> 
> 
> this kind of cose?

sorry
s/cose/code/

> Ce genre de chose?
> 
En quelques sortes, oui, quoique pas tout ? fait !-)


From duncan.booth at invalid.invalid  Mon Mar 12 05:02:25 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Mar 2007 09:02:25 GMT
Subject: Are Lists thread safe?
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
	<1173469137.897102.298120@p10g2000cwp.googlegroups.com>
	<1173469517.797876.262330@t69g2000cwt.googlegroups.com>
	<1173469804.756713.41700@q40g2000cwq.googlegroups.com>
	<mailman.4884.1173491638.32031.python-list@python.org>
Message-ID: <Xns98F15B1EA8C99duncanbooth@127.0.0.1>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> INPLACE_ADD would call MyList.__iadd__ which you have wrapped. But you
>  have a race condition between that moment and the following
> STORE_ATTR, a  context switch may happen in the middle.
> 
> It may not be possible to create an absolutely thread-safe list
> without  some help on the client side. (Comments, someone?)

The list itself can be thread safe quite easily, but if the namespace from 
which you reference it is shared between threads you would have to protect 
the namespace as well, or avoid using in-place operators.

The rebinding is a mutation on the namespace rather than the object, so 
that is what you have to protect.


From wgwigw at gmail.com  Wed Mar 28 20:32:23 2007
From: wgwigw at gmail.com (momobear)
Date: 28 Mar 2007 17:32:23 -0700
Subject: How can I find out the size of a file
In-Reply-To: <1175119748.481117.107910@y80g2000hsf.googlegroups.com>
References: <1175119748.481117.107910@y80g2000hsf.googlegroups.com>
Message-ID: <1175128343.259515.92230@y80g2000hsf.googlegroups.com>

On Mar 29, 6:09 am, Marko.Cain... at gmail.com wrote:
> Hi,
>
> How can I find out the size of a file in a disk in python?
>
> i try this, but it does not work:
>  size = open(inputFileNameDir + "/" + file, 'r').size()
>
> Thank for any help.

os.stat(filename),
see stat manual for detail.(st_size )



From A.Lloyd.Flanagan at gmail.com  Tue Mar  6 14:12:27 2007
From: A.Lloyd.Flanagan at gmail.com (A. Lloyd Flanagan)
Date: 6 Mar 2007 11:12:27 -0800
Subject: When will 2.5.1 be released?
In-Reply-To: <1173037797.127119.248300@h3g2000cwc.googlegroups.com>
References: <1173037797.127119.248300@h3g2000cwc.googlegroups.com>
Message-ID: <1173208347.506758.166620@30g2000cwc.googlegroups.com>

On Mar 4, 2:49 pm, "Nile" <diefi... at comcast.net> wrote:
> This is not a big deal but I would like to use Tix with 2.5.  My
> understanding is this bug will be fixed in the 2.5.1 release. Does

And while we're waiting for 2.5.1, can somebody post a clear (as
opposed to the one that comes with Tix ;)) explanation of how to
manually install Tix into python 2.5?  It should be possible...



From Thomas.Ploch at gmx.net  Wed Mar 14 14:49:17 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Wed, 14 Mar 2007 19:49:17 +0100
Subject: os.path.basename() - only Windows OR *nix?
Message-ID: <45F843AD.6050509@gmx.net>

Hello,

I have a cgi script that handles fileuploads from windows and *nix
machines. i need os.path.basename(filename) to get the pure filename.

For *nix, thats not a problem, but for windows, it always returns the
full path:



#/usr/bin/env python

import cgi, os
import cgitb; cgitb.enable()

form = cgi.FieldStorage()
filename = os.path.basename(form['uploadfile'].filename)

print 'Content-Type: text/html\n\n'
print filename



-----------------

For 'C:\text\text.txt', the output is 'C:\text\text.txt', which should
be 'text.txt', the same happens for 'C:\\text\\text.txt'. I think its
the escapes that makes python not splitting it. All Unix style paths get
converted the right way.

Is there an easy way around this, or do I really have to write a parser
including _all_ Python escapes?

Thomas


From anil.jupiter9 at gmail.com  Sat Mar 10 09:39:13 2007
From: anil.jupiter9 at gmail.com (jupiter)
Date: 10 Mar 2007 06:39:13 -0800
Subject: Database module & multithreading
In-Reply-To: <45f2bfbd$0$5094$ba4acef3@news.orange.fr>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
Message-ID: <1173537553.064123.13260@t69g2000cwt.googlegroups.com>

On Mar 10, 7:29 pm, Laurent Pointal <laurent.poin... at wanadoo.fr>
wrote:
> jupiter wrote:
> > Hi guys!!!
>
> > Just one quick question... Which database module should I use when I
> > want to use multi threading as my application requires lots of data
> > from internet ???? I also want this database module to be fast, simple
> > n efficient, in any case multi threading capabilities are # 1
> > requirement.
>
> > Thanx Guys
>
> > Anil
>
> See the threadsafety flag of Python DB-API V2 compliant database modules.
> 0 = no thread safe
> 1 = threads may share module
> 2 = + may share connections
> 3 = + may share cursors
>
> A+
>
> Laurent.

Thanx for this pointer buddy! I have done my homework. Some Database
modules are not actively maintained some modules  does not work with
Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
it dosent allow me to use multi threading so which database module is
better in terms of multithreading

@



From aleax at mac.com  Thu Mar 29 11:33:33 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 08:33:33 -0700
Subject: Finding a module's sub modules at runtime
References: <460ab913$0$16387$88260bb3@free.teranews.com>
	<1175112265.427331.93340@o5g2000hsb.googlegroups.com>
	<460ac66a$0$16290$88260bb3@free.teranews.com>
Message-ID: <1hvqae5.1alie2515sbssfN%aleax@mac.com>

Joshua J. Kugler <joshua at eeinternet.com> wrote:

> still be nicely portable.  It just seems that since Python is gathering
> that information anyway, it should make it available without me having to
> walk the directory tree.

Sorry, where is Python "gathering that information anyway"?  Unless I'm
mistaken, Python by default does not walk directory trees of subpackages
-- what makes you think it does?


Alex


From rNOSPAMon at flownet.com  Thu Mar  1 13:05:48 2007
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Thu, 01 Mar 2007 10:05:48 -0800
Subject: Python on a mac: how to build pythonw?
References: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>
	<mailman.4582.1172771922.32031.python-list@python.org>
Message-ID: <rNOSPAMon-63AA6E.10054801032007@news.gha.chartermi.net>

In article <mailman.4582.1172771922.32031.python-list at python.org>,
 Robert Kern <robert.kern at gmail.com> wrote:

> Ron Garret wrote:
> > I'm trying to run the Python examples distributed with XCode and they 
> > all give me the same error:
> > 
> > Traceback (most recent call last):
> >   File "checktext.py", line 35, in <module>
> >     main()
> >   File "checktext.py", line 8, in main
> >     pathname = EasyDialogs.AskFileForOpen(message='File to check 
> > end-of-lines in:')
> >   File "/usr/local/lib/python2.5/plat-mac/EasyDialogs.py", line 650, in 
> > AskFileForOpen
> >     _interact()
> >   File "/usr/local/lib/python2.5/plat-mac/EasyDialogs.py", line 53, in 
> > _interact
> >     AE.AEInteractWithUser(50000000)
> > MacOS.Error: (-1713, 'no user interaction is allowed')
> > 
> > Googling reveals that the answer is to use pythonw, but there is no such 
> > thing installed on my system:
> > 
> > [ron at mickey:~]$ pythonw
> > -bash: pythonw: command not found
> > 
> > Apparently, pythonw didn't get built when I installed Python 2.5, and I 
> > can't find any instructions on how to build it.  (The installation 
> > instructions don't seem to mention it.)
> 
> It looks like you built Python yourself.

Yep.  I'm a do-it-yourself kind of guy :-)

> The default build does not allow you to
> communicate with the Apple GUI. You need a framework build. I highly 
> recommend
> that you simply use the binary on www.python.org instead of building from
> source. If you do want to build from source, please read the file Mac/README 
> for instructions.

Okeydokey.

> Note that in recent versions of Python, I believe that the pythonw executable 
> is no longer necessary as a workaround.

How recent?  I'm already using 2.5.

Thanks!
rg


From ptmcg at austin.rr.com  Sun Mar 18 22:38:52 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 18 Mar 2007 19:38:52 -0700
Subject: Mastering Python
In-Reply-To: <1174055241.079644.160750@e1g2000hsg.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
	<1174055241.079644.160750@e1g2000hsg.googlegroups.com>
Message-ID: <1174271932.463826.106290@n59g2000hsh.googlegroups.com>

On Mar 16, 9:27 am, "BartlebyScrivener" <rpdool... at gmail.com> wrote:
> On Mar 16, 8:39 am, "Paul McGuire" <p... at austin.rr.com> wrote:
>
>
>
> > Wow, are you still reading?  Quit wasting time and go download a
> > Python dist and get started already!
>
> I think you should extract that and spend twenty minutes tidying it up
> and then publish it to the Python for Programmers page or make it a
> downloadable .pdf.
>
> http://wiki.python.org/moin/BeginnersGuide/Programmers
>
> rd
>
>  "The chief contribution of Protestantism to human thought is its
>   massive proof that God is a bore."
>
>   --H.L. Mencken

I've added it to this page, see the last entry.  Hope some find it
entertaining, if not informative.

-- Paul



From eglaser at gmail.com  Thu Mar 15 08:26:33 2007
From: eglaser at gmail.com (eglaser at gmail.com)
Date: 15 Mar 2007 05:26:33 -0700
Subject: spawn process in a new console window
In-Reply-To: <etb2le$r37$2@news2.u-psud.fr>
References: <1173923782.156260.299930@p15g2000hsd.googlegroups.com>
	<1173931166.767205.220880@l77g2000hsb.googlegroups.com>
	<etb2le$r37$2@news2.u-psud.fr>
Message-ID: <1173961593.622422.172720@b75g2000hsg.googlegroups.com>

On Mar 15, 5:12 am, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> gregpin... at gmail.com a ?crit :
>
>
>
> > On Mar 14, 9:56 pm, egla... at gmail.com wrote:
> >> Hello,
>
> >> I have a script that launches a sequence of other programs, some GUI,
> >> some console.  I'd like the console programs to launch in their own
> >> console window, instead of all of them sharing the script's console.
> >> How do I do that?
>
> > Would the subprocess module help here?  It's available in Python 2.4
> > onwards.  I think it's supposed to be a one stop shop for all your
> > external application launching needs (Python group, please correct me
> > if I'm wrong here).
>
> > -Greg
>
> Try to use "start"
>
> >>> import os
> >>> os.system("start cmd")
>
> Open a new console with a cmd shell in it.
>
> See start documentation herehttp://www.ss64.com/nt/start.html
> Or typing help start on the command line.


It looks like 'start' might be exactly what I need.  Thanks.

Eli



From exarkun at divmod.com  Sat Mar  3 00:45:37 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 3 Mar 2007 00:45:37 -0500
Subject: implementing SFTP using Python
In-Reply-To: <683868.19200.qm@web38806.mail.mud.yahoo.com>
Message-ID: <20070303054537.17852.1051043701.divmod.quotient.2193@ohm>

On Fri, 2 Mar 2007 20:42:55 -0800 (PST), kadarla kiran kumar <kadarlakiran at yahoo.com> wrote:
>Hi Everybody,
>
>  I have to implement SFTP conection from client to the server using Python script.
>  Iam very new new to python , and i dont't have much time to complete this. So I need some pointers from you.
>
>  If anybody has already done this kind of stuff, please let me know. Please don't think Iam over ambitious, but i need some kind of Pseudo code ,if possible source code.

http://www.google.com/search?hl=en&safe=off&q=%22python+sftp+server%22&btnG=Search might be a place to start.

Jean-Paul


From dcramer at gmail.com  Sat Mar 10 22:23:44 2007
From: dcramer at gmail.com (David Cramer)
Date: 10 Mar 2007 19:23:44 -0800
Subject: Python in a desktop environment
Message-ID: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>

If you had an application that you were about to begin development on
which you wanted to be cross platform (at least Mac and Windows),
would you suggest using c++ and Python?

I'm asking because we were originally thinking about doing c# but
after attending PyCon this year I'm reconsidering. We are already
using Python for the website and I figure a c++ backend w/ a Python
GUI may work really well, and would be pretty easy to port.

Any opinions?



From http  Sun Mar 11 08:05:50 2007
From: http (Paul Rubin)
Date: 11 Mar 2007 04:05:50 -0800
Subject: a better solution for GUI in python
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <7xmz2kq929.fsf@ruckus.brouhaha.com>

"ce" <cedb816 at yahoo.com> writes:
> My company is using python currently for our website. We need to
> develop a GUI front-end for our ERP that would be portable (Windows
> and Linux).

Some reason not to use a browser interface instead of a client gui?


From laurent.pointal at wanadoo.fr  Wed Mar  7 13:10:49 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Wed, 07 Mar 2007 19:10:49 +0100
Subject: Generator expression parenthesis mixed with function call ones
References: <esmn5q$5ni$1@news2.u-psud.fr>
	<mailman.4756.1173283788.32031.python-list@python.org>
	<esmoeq$6b5$1@news2.u-psud.fr>
	<cxCHh.124954$_73.46561@newsread2.news.pas.earthlink.net>
Message-ID: <45eeff24$0$27370$ba4acef3@news.orange.fr>

Dennis Lee Bieber wrote:

> On Wed, 07 Mar 2007 17:15:33 +0100, Laurent Pointal
> <laurent.pointal at limsi.fr> declaimed the following in comp.lang.python:
> 
>> 
>> How a Python beginner know that he is using a generator and not a
>> list-comprehension ?
>>
> A list comprehension ALWAYS has list brackets [...] around it...

Yes, and a generator expression ALWAYS has round brackets... which can be
confused with function call ones when it is used in a single argument
function call...
I still personnaly think function call round brackets and generator
expression round brackets should both be present.



From lobais at gmail.com  Fri Mar 23 10:29:17 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Fri, 23 Mar 2007 15:29:17 +0100
Subject: Exception passing
Message-ID: <pan.2007.03.23.14.29.34@gmail.com>

Hi, I have a function, which looks like the following:

connecting = False
def func ():
    global connecting
    connecting = True
    try:
       # Do lot of network stuff
    except Exception, e:
        connecting = False
        raise e

This works quite good, but it is a hell to debug. Instead of getting a 
log message to the line which originally raised the exception.

Is there anyway to reraise an exception, but preserve the log?


From jjl at pobox.com  Sat Mar 10 20:24:06 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 11 Mar 2007 01:24:06 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
	<IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
	<87tzwszmdc.fsf@pobox.com>
	<_3IIh.9178$jx3.4584@newssvr25.news.prodigy.net>
Message-ID: <87d53gzi6c.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:

> John J. Lee wrote:
> > John Nagle <nagle at animats.com> writes:
> >
> >>skip at pobox.com wrote:
> > Traditionally, in the open source world, one does something about it,
> > or shuts up after having made one's point, say, ten or twenty times
> 
>      In retail, there's an assumption that for every customer who complains
> about a real problem, about a hundred customers noticed it and didn't complain,
> and about twenty of them will never come back.

...and, in the gift economy of open source, it's for the giver to
recognise that, and the receiver to stop whingeing about it.


John


From irmen.NOSPAM at xs4all.nl  Wed Mar 28 18:09:26 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Thu, 29 Mar 2007 00:09:26 +0200
Subject: How can I find out the size of a file
In-Reply-To: <1175119748.481117.107910@y80g2000hsf.googlegroups.com>
References: <1175119748.481117.107910@y80g2000hsf.googlegroups.com>
Message-ID: <460ae7d0$0$338$e4fe514c@news.xs4all.nl>

Marko.Cain.23 at gmail.com wrote:
> How can I find out the size of a file in a disk in python?

os.path.getsize(filename)


-Irmen


From deets at nospam.web.de  Sat Mar 24 14:07:56 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 Mar 2007 19:07:56 +0100
Subject: Join strings - very simple Q.
In-Reply-To: <1174758072.851763.80860@e1g2000hsg.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<Xns98FD812654515duncanbooth@127.0.0.1>
	<1174758072.851763.80860@e1g2000hsg.googlegroups.com>
Message-ID: <56l7o3F29kgs9U2@mid.uni-berlin.de>

7stud schrieb:
> On Mar 24, 8:30 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>> In case you are feeling that the ','.join(l) looks a bit jarring, be aware
>> that there are alternative ways to write it. You can call the method on the
>> class rather than the instance:
>>
>>    jl = str.join(',', l)
>>    jl = unicode.join(u'\u00d7', 'l')
>>
>> ... the catch is you need to know
>> the type of the separator in advance.
> 
> When I try the latter example, I get an error:
> 
> lst = ["hello", "world"]
> print unicode.join(u"\u00d7", lst)
> 
> Traceback (most recent call last):
>   File "test1.py", line 2, in ?
>     print unicode.join(u"\u00d7", lst)
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xd7' in
> position 5: ordinal not in range(128)

You are mixing unicode with bytestrings here. make "hello" u"hello", 
same for "world".

Diez


From jordan.taylor2 at gmail.com  Fri Mar 16 08:36:13 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 16 Mar 2007 05:36:13 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <45fa88e4$0$27372$ba4acef3@news.orange.fr>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
	<1174035726.525608.3340@e1g2000hsg.googlegroups.com>
	<1174036100.468116.60780@l77g2000hsb.googlegroups.com>
	<45fa88e4$0$27372$ba4acef3@news.orange.fr>
Message-ID: <1174048573.649381.43360@d57g2000hsg.googlegroups.com>

On Mar 16, 7:09 am, Laurent Rahuel <lrahuel.notg... at voila.fr> wrote:
> Maybe the walk method in os module is what you needhttp://docs.python.org/lib/os-file-dir.html
>
> Regards
>
> Jon Clements wrote:
> > On 16 Mar, 09:02, "Jon Clements" <jon... at googlemail.com> wrote:
> >> On 16 Mar, 03:56, "hiro" <Nun... at gmail.com> wrote:
>
> >> > Hi there,
>
> >> > I'm very new to python, the problem I need to solve is whats the "best/
> >> > simplest/cleanest" way to read in multiple files (ascii), do stuff to
> >> > them, and write them out(ascii).
>
> >> > --
> >> > import os
>
> >> > filePath = ('O:/spam/eggs/')
> >> > for file in os.listdir(filePath):   #straight from docs
> >> >     # iterate the function through all the files in the directory
> >> >     # write results to separate files  <- this is where I'm mostly
> >> > stuck.
>
> >> > --
> >> > For clarity's sake, the file naming conventions for the files I'm
> >> > reading from are file.1.txt -> file.nth.txt
>
> >> > It's been a long day, i'm at my wits end, so I apologize in advance if
> >> > I'm not making much sense here.
> >> > syntax would also be great if you can share some recipes.
>
> >> I'd try the glob module.
>
> >> [code]
> >> import glob
>
> >> # Get a list of filenames matching wildcard criteria
> >> # (note that path is relative to working directory of program)
> >> matching_file_list = glob.glob('O:/spam/eggs/*.txt')
>
> >> # For each file that matches, open it and process it in some way...
> >> for filename in matching_file_list:
> >>     infile = file(filename)
> >>     outfile = file(filename + '.out','w')
> >>     # Process the input file line by line...
> >>     for line in infile:
> >>         pass # Do something more useful here, change line and write to
> >> outfile?
> >>     # Be explicit with file closures
> >>     outfile.close()
> >>     infile.close()
> >> [/code]
>
> >> Of course, you can change the wild card criteria in the glob
> >> statement, and also then filter further using regular expressions to
> >> choose only files matching more specific criteria. This should be
> >> enough to get you started though.
>
> >> hth
>
> >> Jon.- Hide quoted text -
>
> >> - Show quoted text -
>
> > Okies; postcoding before finishing your early morning coffee is not
> > the greatest of ideas!
>
> > I forgot to mention that glob will return pathnames as well. You'll
> > need to check that os.path.isfile(filename) returns True before
> > processing it...
>
> > Jon.

Also, leaving the format as .out is not necessarily convenient.  You
had glob do a search for .txt, so how about doing:

Also, Python advises using open() over file() (although I admit to
using file() myself more often than not)
>>for filename in matching_file_list:
>>     infile = open(filename,'r') # add 'r' for clarity if nothing else
>>     outfile = open(filename[:-4] + '.out.txt','w') # assumes file ext of original file is .txt
>>     # Process the input file line by line...
>>     for line in infile:
>>         pass # do thing --> you don't have to iterate line by line, if you specified what you wanted to do to each file we could probably help out here if you need it.
>>     # Be explicit with file closures
>>     outfile.close()
>>     infile.close()

Might also add some try/except statements to be safe ;).

Cheers,
Jordan



From jstroud at mbi.ucla.edu  Fri Mar 16 20:44:00 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 16 Mar 2007 17:44:00 -0700
Subject: Executing a list of functions
In-Reply-To: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
References: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
Message-ID: <etfdkg$ilt$1@daisy.noc.ucla.edu>

HMS Surprise wrote:
> Seems to me that one should be able to put the names of several
> functions in a list and then have the list executed. But it seems the
> output of the functions is hidden, only their return value is visible.
> Is this because the list execution is another scope?
> 
> Thanx,
> 
> jh
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> def a():
>     print "this is a"
> 
> def b():
>     print "this is b"
> 
> lst = [a(), b()]
> 
> lst
> 

The "print" statement does nothing to return a value from the function, 
so the strings "this is *" will not be stored in your list. They will, 
however, be printed if you are some how observing your program output 
(e.g. running it in IDLE, or a command shell).

To save the "results" of the functions, you need to produce results, 
which means actually using "return" to return some value. Here is an 
example:


def a():
   print "this is a"
   return "return value from a"

def b():
   print "this is b"
   return "return value from b"

functions = [a, b]
results = [f() for f in functions]
print results


Here is the result of this example:


py> def a():
...   print "this is a"
...   return "return value from a"
...
py> def b():
...   print "this is b"
...   return "return value from b"
...
py> functions = [a, b]
py> results = [f() for f in functions]
this is a
this is b
py> print results
['return value from a', 'return value from b']


A fun, but unfortunately deprecated, way to do this is with the "apply" 
function in conjunction with the "map" function:


def a():
   print "this is a"
   return "return value from a"

def b():
   print "this is b"
   return "return value from b"

functions = [a, b]
results = map(apply, functions)
print results


Here is this example at work:


py> def a():
...   print "this is a"
...   return "return value from a"
...
py> def b():
...   print "this is b"
...   return "return value from b"
...
py> functions = [a, b]
py> results = map(apply, functions)
this is a
this is b
py> print results
['return value from a', 'return value from b']


James


From frank-python at benkstein.net  Thu Mar 22 13:25:11 2007
From: frank-python at benkstein.net (Frank Benkstein)
Date: Thu, 22 Mar 2007 18:25:11 +0100
Subject: challenge ?
In-Reply-To: <20070322181146.6ac4999d@localhost>
References: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
	<20070322181146.6ac4999d@localhost>
Message-ID: <20070322182511.07fdf4d4@localhost>

Hi, again,

On Thu, 22 Mar 2007 18:11:46 +0100
Frank Benkstein <frank-python at benkstein.net> wrote:

> On 22 Mar 2007 09:41:43 -0700
> "alain" <alainpoint at yahoo.fr> wrote:
> 
> > I have a problem I wonder if it has been solved before.
> > I have a dictionnary and I want the values in the dictionnary to be
> > annotated with the rank that would be obtained by sorting the values
> > 
> > def annotate_with_rank(my_dict):
> > 	....
> > 	return my_annotated_dict
> > 
> > In other words, any value a_value would become a 2-tuple
> > (a_value,rank_of_a_value)
> > 
> > I seek an elegant solution.
> 
> In your specification of the problem it is unclear what should be done
> with duplicate values. My solution assigns every value a different
> rank (starting from 0) such that the highest rank is len(my_dict) - 1.

The two other possibilities were to still make len(my_dict) ranks but
assign equal values an equal rank. That would mean that some ranks are
untaken. Or, lastly, to make only as much ranks as there are unique
values.
 
> def annotate_with_rank(my_dict):
>     items = my_dict.items()
>     items.sort(key = lambda (k, v): v)
>     return dict((k, (i, v)) for i, (k, v) in enumerate(items))

def annotate_with_rank_2(my_dict):
    values = my_dict.values()
    values.sort()
    return dict((k, (values.index(v), v)) for k, v in my_dict.iteritems())

def annotate_with_rank_3(my_dict):
    values = list(set(my_dict.itervalues()))
    values.sort()
    return dict((k, (values.index(v), v)) for k, v in my_dict.iteritems())

Best regards,
Frank Benkstein.

-- 
GPG (Mail): 7093 7A43 CC40 463A 5564  599B 88F6 D625 BE63 866F
GPG (XMPP): 2243 DBBA F234 7C5A 6D71  3983 9F28 4D03 7110 6D51
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From mail at microcorp.co.za  Sun Mar 11 06:27:32 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 11 Mar 2007 12:27:32 +0200
Subject: distributed queue?
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com><55h495F250nqbU1@mid.individual.net>
	<7xhcsssgsm.fsf@ruckus.brouhaha.com>
Message-ID: <01ad01c763cc$0218b3c0$03000080@hendrik>

 "Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote:

> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
> > (Why does everyone think that "concurrency" equals "usage of
> > multiple threads"?)
> 
> Well, it doesn't necessarily, but that's easiest a lot of the time.
> 
> > Try Twisted for your networking needs. 
> 
> I should try to understand Twisted better one of these days, but it's
> much more confusing than threads.  Also, the function I want to
> parallelize does blocking operations (database lookups), so in Twisted
> I'd have to figure out some way to do them asynchronously.

I would think of making 'pullers' in the remote machines in front of 
whatever it is you are making parallel to get the next thing to do, 
from a 'queue server' in the originating machine to distribute the 
stuff.

I am not sure if Pyro can help you as I have only read about it and 
not used it but I think its worth a look. If it were a one on one
setup I would not hesitate to recommend it but I can't remember 
if it is any good for one to many scenarios.

- Hendrik




From gagsl-py2 at yahoo.com.ar  Sun Mar 11 15:48:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 16:48:04 -0300
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
Message-ID: <op.to1imes5x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 15:26:01 -0300, Alex Martelli <aleax at mac.com> escribi?:

> Or maybe we should give up ever storing -0.0 in the tables
> of constant and ALWAYS have "0.0, unary-minus" wherever it appears (that
> would presumably require working on the AST-to-bytecode visitors that
> currently work ever-so-slightly-differently for this specific
> troublespot in the C-coded version vs the Python-coded one...).

I think that way is the less intrusive, doesn't rely on a particular FP  
implementation, and the more likely to be accepted.
Looking at ast.c, the culprit is some optimization in ast_for_factor, line  
1506
     /* If the unary - operator is applied to a constant, don't generate
        a UNARY_NEGATIVE opcode.  Just store the approriate value as a
        constant.  The peephole optimizer already does something like
        this but it doesn't handle the case where the constant is
        (sys.maxint - 1).  In that case, we want a PyIntObject, not a
        PyLongObject.
     */

After the long "if", I would use parsenumber(STR(pnum)) and check the type  
and value of the resulting object; if it's a float and 0.0, skip the  
optimization and continue below as a normal case.
Unfortunately I'm not able to compile and test the code right now, so I  
can't provide an actual patch. (At least, not until tuesday). But I hope  
this simple comment is useful anyway...

(I cannot find peephole.c on the source distribution for Python 2.5, but  
you menctioned it on a previous message, and the comment above refers to  
the peephole optimizer... where is it?)

-- 
Gabriel Genellina



From anton.vredegoor at gmail.com  Fri Mar 30 02:55:48 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Fri, 30 Mar 2007 08:55:48 +0200
Subject: Hpw make lists that are easy to sort.
In-Reply-To: <mailman.5738.1175135745.32031.python-list@python.org>
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl><7xbqidgqy0.fsf@ruckus.brouhaha.com>	<euenlj$oll$1@news4.zwoll1.ov.home.nl><mailman.5732.1175121444.32031.python-list@python.org>	<eueu79$mkd$1@news5.zwoll1.ov.home.nl>
	<mailman.5738.1175135745.32031.python-list@python.org>
Message-ID: <euic9f$nm3$2@news2.zwoll1.ov.home.nl>

Terry Reedy wrote:

> If I understand correctly, you want to multiiply each of m numbers by each 
> of n numbers, giving m*n products.  That is O(m*n) work.  Inserting (and 
> extracting) each of these is a constant size m priority cue takes, I 
> believe, O(log(m)) work, for a total of m*n*log(m).  That is faster than 
> O(m*n*log(m*n)) for sorting m*n random numbers.

According to this page:

http://maven.smith.edu/~orourke/TOPP/P41.html

You are very close. The only thing is whether the logarithmic factor can 
be removed.

But there's more:

</quote>
If the input consists of n integers between - M and M, an algorithm of 
Seidel based on fast Fourier transforms runs in O(n + M log M) time 
[Eri99a]. The $ \Omega$(n2) lower bounds require exponentially large 
integers.
<quote>

So maybe there is something at least for this specific case. I hope I'm 
not irritating someone by posting my thought processes here, since 
posting things sometimes seems to be the only way to find the links. I 
wonder if it's the selective attention that makes them turn up after 
posting or whether your talk about big O's has put me on the right track.

Thanks anyway. The problem is still open in general, but some hacks are 
possible, as Paul Rubin said.

A.


From esj at harvee.org  Fri Mar 23 11:30:42 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Fri, 23 Mar 2007 11:30:42 -0400
Subject: fine grain logging cotrol
In-Reply-To: <etvvij$7h3$01$1@news.t-online.com>
References: <mailman.5451.1174567188.32031.python-list@python.org>	<etu19j$nqi$03$1@news.t-online.com>	<mailman.5464.1174579174.32031.python-list@python.org>	<etuvoj$pqs$03$1@news.t-online.com>
	<etvvij$7h3$01$1@news.t-online.com>
Message-ID: <eu0rr6$ln4$1@sea.gmane.org>

Peter Otten wrote:
> Eric S. Johansson wrote:
> 
> [in private mail -- please don't, Eric]

sorry.  my preference is for private mail.  it's my way of trying to be 
kind to others by reducing list clutter.

> I don't understand. The logging package detects the function name without
> user intervention. 

not in 2.4 afaik.  according to the docs for debug/info it the only 
kwargs which is inspected is exc_info.

> Perhaps it's time to step back and explain what you want to achieve rather
> than how you proceed.

print a log message if a predicate yields true.

should be able to have different predicates.

the desired predicate is a match on class, method, and level number. 
class and method should be found automatically by the logging predicate 
code.

apologies again for violating your email protocol and thanks for the help.




From antoine at vo.lu  Sun Mar  4 14:38:16 2007
From: antoine at vo.lu (Antoine De Groote)
Date: Sun, 04 Mar 2007 20:38:16 +0100
Subject: looking for Java final/Ruby freeze functionality in Python
Message-ID: <45eb1fdf$1@news.vo.lu>

Hello,

I've been googling for quite a while now but can't find anything about a 
function/keyword to make a list (or something else) immutable. Could 
anybody point me to docs about this matter or give me a reason why this 
(apparently) doesn't exist in Python?

Kind regards,
antoine


From bdesth.quelquechose at free.quelquepart.fr  Tue Mar 20 17:19:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 20 Mar 2007 22:19:26 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
	<pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
Message-ID: <4600476b$0$752$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Tue, 20 Mar 2007 10:28:10 +0100, Bruno Desthuilliers wrote:
> 
> [deploying weapons of mass snippage]

Lol !-)

> 
>>>Otherwise, the choice between old
>>>and new is not very important.
>>
>>Your opinion. Too bad you're missing some of the most powerful parts of 
>>the language.
> 
> 
> Yes, it is my opinion, and it seems that in your zeal to defend new-style
> classes against an imaginary attack, you've completely misunderstood what
> my opinion is.

Your opinion, as I understood it, is that it's not worth six extra 
keystrokes (in the worse case) to get the full power of Python's object 
model.

> I'm not against new-style classes. I do use new-style classes. 

So why do you use old-style ones too ? Seems like it would be simpler to 
stick to new-style whatever, no ?

> There are a
> whole lot of extra features that new-style classes have that old-style
> classes don't have, some of which I didn't even think of. (Thanks for
> pointing them out, and I'm not being sarcastic.)
> 
> There are plenty of reasons for preferring new style classes. If those
> reasons hold for you, then of course you should use new style classes.
> 
> But that's not the same thing as saying that you should use new style
> classes *even when you don't care about those features*.

Could we see it the other way round ? Everything you can do with 
old-style classes (except writing code compatible with more than 
six-years old python interpreters), you can do with new-styles. So why 
even wasting time asking yourself if you need these features now or will 
need them later ? Saving six extra keystrokes ? How much time do you 
need to type 'object' ? Certainly less than 1 second. And how much time 
will you spend when you'll find out that you finally need some of these 
'extra' features ?

> I never once suggested that new style classes are unnecessary, or a waste
> of time, or bad, or whatever else you seem to think I was saying. My point
> was, if you don't _need_ a new style class, there is no reason to avoid
> using an old style class. It is a purely personal choice.

My point is that there's no reason to keep on using old-style classes 
(compatibility with six-years old interpreters set aside).

> There seems to be a misunderstanding that classic classes have been
> depreciated. They certainly have not.

Not officially yet, true. But come on, it's been 6 (six) years since 
type unification, and it has always been obvious (to me at least) that 
the new object model was to replace the 'classic' one.


From kyosohma at gmail.com  Fri Mar 23 09:30:50 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 06:30:50 -0700
Subject: Catching an unknown error
In-Reply-To: <1174656547.825228.54240@e65g2000hsc.googlegroups.com>
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
	<1174656547.825228.54240@e65g2000hsc.googlegroups.com>
Message-ID: <1174656650.409980.60280@e65g2000hsc.googlegroups.com>

On Mar 23, 8:29 am, kyoso... at gmail.com wrote:
> On Mar 23, 8:16 am, "Harlin Seritt" <harlinser... at yahoo.com> wrote:
>
>
>
> > Using the code below:
>
> > ---BEGIN CODE---
>
> > value = raw_input("Type a divisor: ")
> > try:
> >    value = int(value)
> >    print "42 / %d = %d" % (value, 42/value)
> > except ValueError:
> >         print "I can't convert the value to an integer"
> > except ZeroDivisionError:
> >         print "Your value should not be zero"
> > except:
> >         print "Something unexpected happened"
>
> > ---END CODE---
>
> > In the last 'except' block, how can I print out the particular error
> > name even though one is not specifically named?
>
> > Thanks,
>
> > Harlin
>
> Make the last 'except' block like this:
>
> Except Exception, e:
>    print e
>
> Mike

just don't capitalize the word "except" ... my bad



From phd at phd.pp.ru  Mon Mar 19 12:39:53 2007
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Mon, 19 Mar 2007 19:39:53 +0300
Subject: SQLObject 0.7.4
Message-ID: <20070319163953.GB32328@phd.pp.ru>

Hello!

I'm pleased to announce the 0.7.4 release of SQLObject.

What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.7.4

News and changes:
http://sqlobject.org/docs/News.html


What's New
==========

News since 0.7.3
----------------

* Documentation updates

Small Features
--------------

* For MySQLdb 1.2.2+ call ping(True) on the connection to allow
  autoreconnect after a timeout.

Bug Fixes
---------

* Another round of changes to create/drop the tables in the right order
  in the command-line client `sqlobject-admin`.

* Fixed a bug in UnicodeField - allow comparison with None.

For a more complete list, please see the news:
http://sqlobject.org/docs/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From mccredie at gmail.com  Mon Mar  5 20:16:21 2007
From: mccredie at gmail.com (Matimus)
Date: 5 Mar 2007 17:16:21 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <1173130489.377736.312100@30g2000cwc.googlegroups.com>
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<1173130489.377736.312100@30g2000cwc.googlegroups.com>
Message-ID: <1173143781.522198.111870@q40g2000cwq.googlegroups.com>

On Mar 5, 1:34 pm, "Matimus" <mccre... at gmail.com> wrote:
> On Mar 5, 11:03 am, "Steven W. Orr" <ste... at syslang.net> wrote:
>
> > I have a list ll of intergers. I want to see if each number in ll is
> > within the range of 0..maxnum
>
> > I can write it but I was wondering if there's a better way to do it?
>
> > TIA
>
> > --
> > Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
> > happened but none stranger than this. Does your driver's license say Organ ..0
> > Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
> > individuals! What if this weren't a hypothetical question?
> > steveo at syslang.net
>
> I would probably do something using max and min functions like this:
>
> seq = [...] # your list
>
> if min(seq) >= 0 && max(seq) <= MAXNUM:
>  do stuff

OOps... I've been writing too much C++ lately (or too little python).
That should read:

if min(seq) >= 0 and max(seq) <= MAXNUM:
    do_stuff()



From markbpan at mailinator.com  Fri Mar 23 03:30:58 2007
From: markbpan at mailinator.com (Mark)
Date: 23 Mar 2007 07:30:58 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
Message-ID: <pan.2007.03.23.07.30.56@mailinator.com>

On Fri, 23 Mar 2007 14:03:12 +1100, Steven D'Aprano wrote:
> Since you've done these tests already, perhaps you can tell us what gain
> you actually got?

About the same as you, ~20 msecs for my small script samples.

> Of course you have to type the "c". You're not deleting the source files
> away are you? *wink*

Sorry, the wink is lost on me?

Of course I am not deleting the sources. In fact, I am also talking
about python scripts being called from shell scripts. I guess I'm just
surprised that the python installation does not provide a small stub
invoker, e.g:

A small script called "python_compile_and_run" in "pseudo" code:

#!/usr/bin/env python
import sys

# Following is invalid syntax unfortunately :(
from sys.argv[1].rstrip('.py') import main

sys.argv = sys.argv[1:]
if __name__ == "__main__":
    main()

so I could just do a "python_compile_and_run myscript.py" and it would
do what I want, i.e. run myscript.pyc if available and valid, generate
and run it if necessary.


From john106henry at hotmail.com  Mon Mar 19 14:21:20 2007
From: john106henry at hotmail.com (John Henry)
Date: 19 Mar 2007 11:21:20 -0700
Subject: PythonCard or Dabo?
In-Reply-To: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
References: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
Message-ID: <1174328480.776648.250990@b75g2000hsg.googlegroups.com>

On Mar 19, 10:24 am, Kevin Walzer <k... at codebykevin.com> wrote:
> I'm curious to know what others think of these two frameworks for
> building wxPython apps.
>
> PythonCard has been around longer, but its development seems to have
> slowed. The last release, 0.8.2, has been out for quite awhile now.
>
> Dabo is newer and seems to have gathered a lot of buzz.
>
> Anyone try both? What's your preference and why? Is one more robust than
> the other?
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com


It all depends on what your needs are.  I agree with Steve's comment
that the two packages has somewhat of a different application in
mind.  If you need a working GUI application working *really* quick, I
highly recommend Pythoncard - but if you need anything else, you might
look at other packages.

You might not see lots of development activities with Pythoncard but
sometimes not being the breeding edge has its place.



From rdm at rcblue.com  Sat Mar 17 06:21:41 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 17 Mar 2007 03:21:41 -0700
Subject: Weekly Python Patch/Bug Summary
In-Reply-To: <etg921$9kt$1@sea.gmane.org>
References: <200703170454.l2H4skKe003172@bayview.thirdcreek.com>
	<20070317075121.565D11E4005@bag.python.org>
	<etg921$9kt$1@sea.gmane.org>
Message-ID: <20070317102146.4440B1E4010@bag.python.org>

At 01:32 AM 3/17/2007, Terry Reedy wrote:

>"Dick Moores" <rdm at rcblue.com> wrote in message
>news:20070317075121.565D11E4005 at bag.python.org...
>| May I ask a dumb question here? It isn't clear to me what to do with
>these patches. For most of them there is something like, "Committed as
>r54386 and r54387". I'm familiar with updating the editor Ulipad to the
>latest revision, using software such as TortoiseSVN and RapidSVN. Is that
>what is meant? And if so, what's the URL of the trunk?
>---------
>
>Yes, those are svn revision numbers.  Start at svn.python.org.

I thought I'd give 
<http://svn.python.org/projects/python/branches/release25-maint/> 
(the latest release (plus bug fixes) of Python) a try. I first backed 
up my Python25 folder (I'm using Win XP). Then with Python 25 open I 
opened the Explorer context menu for the folder and then the 
TortoiseSVN sub-menu. There doesn't seem to have a menu item that 
will enable me to update. I tried Export... and entered 
<http://svn.python.org/projects/python/branches/release25-maint/> as 
"URL of repository", but that choice seems to expect the Python25 
folder to be empty. Can you tell me what to do to just update?

Dick 



From miki.tebeka at gmail.com  Thu Mar 22 17:04:28 2007
From: miki.tebeka at gmail.com (Miki)
Date: 22 Mar 2007 14:04:28 -0700
Subject: Making GIF image twice the size - in memory
Message-ID: <1174597468.170020.115340@e65g2000hsc.googlegroups.com>

Hello All,

I get an image from a web page (via urlopen), and like to make it
twice the size.
I'm trying (using PIL):
---- code ----
from ImageFile import Parser
def double(image_data):
    image_parser = Parser()
    image_parser.feed(image_data)
    im = image_parser.close()
    new_size = tuple(map(lambda x: 2 * x, im.size))
    new = im.resize(new_size)

    return new.tostring("gif", "P") # This is probably the problem,
have no idea

image_data = urlopen(url).read()
image_data = double(image_data)
---- code ----

However I don't get a valid GIF image.

Any ideas?

Thanks,
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From lojicdotcomNOSPAM at gmail.com  Thu Mar  8 00:35:13 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Thu, 08 Mar 2007 00:35:13 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
Message-ID: <igNHh.724$R61.704@bignews1.bellsouth.net>

John Nagle wrote:
> Brian Adkins wrote:
>> alex23 wrote:
>>
>>> John Nagle wrote:
>>>
>>>> Hosting providers and distro
>>>> makers aren't concerned over whether Python works.  They
>>>> care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
>>>> Ask them.
>>>
>>>
>>> Do you have any real experience with recent linux distros? Or with any
>>> _real_ hosting providers?
> 
>    Do you?  You're writing from a gmail account, not your own site.
> 
>    I have four hosting accounts with EZpublishing and a dedicated server
> at Aplus.net.  I spent weeks trying to find a hosting provider that
> would provide a Python environment that "just works", like everyone
> does for Perl.  What you typically get is a basic Python 2.4,
> and a refusal to install more packages, because it's so time-consuming.
> Or a quote of $50 to $150 per hour to install Python packages.
> 
>    There are a very few hosting providers that actually want to provide
> Python hosting, such as Hard Hat Hosting.  But most don't.
>>>
>>> Because what you've said is clearly not true. Just because the
>>> situation isn't as easy _for you_ as you would like, doesn't mean that
>>> Python is being ignored to the extent you're trying to claim.
> 
>    I don't see any evidence to back up this unsubstantiated claim.
> 
>                 John Nagle

Ok, since you provided some details you appear less troll-like, so I'll 
ignore my own advice.

With prices of dedicated servers and virtual private servers so cheap, 
why would anyone get a hosting account without root access? Once you 
have root, just install whatever you want. It shouldn't take more than a 
few minutes to install Python or whatever language you desire.

If "apt-get install" doesn't give you a recent enough version, just 
download the source and compile it.

Brian

P.S. very cool rag doll physics by the way...


From AWasilenko at gmail.com  Mon Mar 19 01:22:45 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 18 Mar 2007 22:22:45 -0700
Subject: struct.pack returns nothing
In-Reply-To: <mailman.5269.1174281334.32031.python-list@python.org>
References: <mailman.5269.1174281334.32031.python-list@python.org>
Message-ID: <1174281765.884607.113420@p15g2000hsd.googlegroups.com>

On Mar 19, 1:12 am, andma... at gmail.com wrote:
> If I build a strict with:
>
> import struct
> print struck.pack ('i', 1)
>
> it returns a '\n'.
> What's wrong with it???
> :(
>
> --
> Andr?s M.
> ---------------------------------------------

Looks like you spelled struct wrong in the code :)



From tiedon_jano at hotmail.com  Sun Mar  4 02:55:19 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sun, 04 Mar 2007 07:55:19 GMT
Subject: Sorting strings containing special characters (german 'Umlaute')
In-Reply-To: <mailman.4610.1172858099.32031.python-list@python.org>
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>	<hbf.20070302v8dv@bombur.uio.no>	<54r2c4F21fssbU1@mid.individual.net>
	<mailman.4610.1172858099.32031.python-list@python.org>
Message-ID: <HXuGh.13$kH.7@read3.inet.fi>

Robin Becker kirjoitti:
> 
> Bj?rn, in one of our projects we are sorting in javascript in several 
> languages English, German, Scandinavian languages, Japanese; from 
> somewhere (I cannot actually remember) we got this sort spelling 
> function for scandic languages
> 
> a
> .replace(/\u00C4/g,'A~') //A umlaut
> .replace(/\u00e4/g,'a~') //a umlaut
> .replace(/\u00D6/g,'O~') //O umlaut
> .replace(/\u00f6/g,'o~') //o umlaut
> .replace(/\u00DC/g,'U~') //U umlaut
> .replace(/\u00fc/g,'u~') //u umlaut
> .replace(/\u00C5/g,'A~~') //A ring
> .replace(/\u00e5/g,'a~~'); //a ring
> 
> does this actually make sense?

I think this order is not correct for Finnish, which is one of the 
Scandinavian languages. The Finnish alphabet in alphabetical order is:

	a-z, ?, ?, ?

If I understand correctly your replacements cause the order of the last 
3 characters to be

	?, ?, ?

which is wrong.

HTH,
Jussi


From cjlesh at gmail.com  Thu Mar 22 13:42:18 2007
From: cjlesh at gmail.com (cjl)
Date: 22 Mar 2007 10:42:18 -0700
Subject: parsing tables with beautiful soup?
In-Reply-To: <Xns98FB650A2BE0Fduncanbooth@127.0.0.1>
References: <1174499030.042369.312350@n76g2000hsh.googlegroups.com>
	<1174500627.339029.65590@n76g2000hsh.googlegroups.com>
	<Xns98FB650A2BE0Fduncanbooth@127.0.0.1>
Message-ID: <1174585338.122634.219470@b75g2000hsg.googlegroups.com>

DB:

Thank you, that worked perfectly.

-CJL



From magoldfish at gmail.com  Tue Mar  6 17:19:21 2007
From: magoldfish at gmail.com (Marcus)
Date: 6 Mar 2007 14:19:21 -0800
Subject: calendar (date) iterator?
In-Reply-To: <mailman.4729.1173212399.32031.python-list@python.org>
References: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
	<mailman.4729.1173212399.32031.python-list@python.org>
Message-ID: <1173219561.475200.42300@h3g2000cwc.googlegroups.com>

On Mar 6, 3:19 pm, s... at pobox.com wrote:
>     Marcus> I'm looking for useful starting points, suggestions, and sample
>     Marcus> code, to implement a calendar iterator.
>
> Have you looked at dateutil?
>
>    http://labix.org/python-dateutil
>
>     >>> from dateutil.rrule import rrule, DAILY
>     >>> from dateutil.parser import parse
>     >>> rule = rrule(DAILY, count=5, dtstart=parse("2006-03-12"))
>     >>> for d in rule:
>     ...   print d
>     ...
>     2006-03-12 00:00:00
>     2006-03-13 00:00:00
>     2006-03-14 00:00:00
>     2006-03-15 00:00:00
>     2006-03-16 00:00:00
>
> Skip


This is exactly what I was looking for!  Thanks so much!!



From durumdara at gmail.com  Mon Mar 26 09:41:10 2007
From: durumdara at gmail.com (durumdara)
Date: Mon, 26 Mar 2007 15:41:10 +0200
Subject: Zip file writing progress (callback proc)
Message-ID: <4607CD76.2080008@gmail.com>

Hi!

I want to check my zip file writings.
I need some callback procedure to show a progress bar.
Can I do that?
I don't want to modify the PyLib module to extend it, because if I get 
another py, the changes are lost.
This happening too if I copy the zip module to modify it.
Any solution?

Thanks for it:
    dd


From bbxx789_05ss at yahoo.com  Thu Mar 15 23:25:21 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 15 Mar 2007 20:25:21 -0700
Subject: problem with str()
In-Reply-To: <mailman.5156.1174001544.32031.python-list@python.org>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
	<1173990743.998399.82020@b75g2000hsg.googlegroups.com>
	<mailman.5156.1174001544.32031.python-list@python.org>
Message-ID: <1174015521.516078.103240@l77g2000hsb.googlegroups.com>

On Mar 15, 5:31 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> The fact that a list comprehension "leaks" its variables into the  
> containing scope is a bit weird.
> A generator expression doesn't:
>
> py> str
> <type 'str'>
> py> w = (str for str in range(10))
> py> w
> <generator object at 0x00AD7C38>
> py> str
> <type 'str'>
> py> w.next()
> 0
> py> str
> <type 'str'>

On Mar 15, 5:34 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> or:
>
>    methodList = list(str for str in names if callable(getattr(obj, str)))
>
> genexps, unlike listcomps, make a new scope for their index variable.


Thanks.



From kyosohma at gmail.com  Mon Mar 26 12:04:02 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 09:04:02 -0700
Subject: wx.grid problem
In-Reply-To: <4607e4f1$0$5098$ba4acef3@news.orange.fr>
References: <4607e4f1$0$5098$ba4acef3@news.orange.fr>
Message-ID: <1174925041.703904.151900@y80g2000hsf.googlegroups.com>

On Mar 26, 10:20 am, BH <B... at bh.com> wrote:
> Hi !
>
> I have a small problem with wx.Grid and scrollbars.
> Scrollbars definitively dissapears after resizing the frame.
>
> Thx for help
>
> #----------------------------------------------------------------------
> import wx,wx.grid
> #----------------------------------------------------------------------
> class MainWindow(wx.Frame):
>       def __init__(self,parent,id,title):
>           wx.Frame.__init__(self,parent,wx.ID_ANY,title)
>           #--
>           self.grid= wx.grid.Grid(id=wx.ID_ANY,parent=self)
>           self.grid.CreateGrid(numRows=10,numCols=2)
>           self.grid.Fit()
>           self.Fit()
>           #--
>           self.Show(1)
> #----------------------------------------------------------------------
> app = wx.PySimpleApp()
> frame=MainWindow(None,-1,'Grid sizer')
> app.MainLoop()
> del app

If I understand this correctly, that is normal. Your grid is only two
columns by 10 rows, so if you resize your frame so that it shows all
rows and columns, the scroll bars will disappear, much like other
apps, such as FireFox. If you enlarge the frame enough, the scrollbars
go away.

Mike



From facundo at taniquetil.com.ar  Mon Mar  5 10:43:35 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Mon, 5 Mar 2007 15:43:35 +0000 (UTC)
Subject: Why does SocketServer default allow_reuse_address = false?
References: <45e3668e$0$16385$88260bb3@free.teranews.com>
Message-ID: <eshdr6$p89$1@sea.gmane.org>

Joshua J. Kugler wrote:

> Considering that UNIX Network Programming, Vol 1 (by W. Richard Stevens)
> recommends "_All_ TCP servers should specify [SO_REUSEADDR] to allow the
> server to be restarted [if there are clients connected]," and that
> self.allow_reuse_address = False makes restarting a server a pain if there
> were connected clients, why does SocketServer default allow_reuse_address
> to False?  It's kind of bemusing to subclass ThreadingTCPServer just to
> change one variable that arguably should have been True in the first place.
>
> Is there some history to this of which I'm not aware?  Is there a good
> reason for it to default to false?

If any, don't know. Searched in already reported bugs to check if
somebody already noticed.

If not, please consider to open a bug.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/





From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 12:27:37 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 03:27:37 +1100
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174488447.404840.112960@n76g2000hsh.googlegroups.com>
	<1174488908.420851.303850@y66g2000hsf.googlegroups.com>
Message-ID: <pan.2007.03.21.16.27.37.523923@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 07:55:08 -0700, dmitrey top posted:

> I think it should result

What's "it"? Please don't top post, it makes your answer hard to
understand and makes your readers have to do more work to read your posts.
We're not being paid to read your posts, so I'd estimate that about 70% of
readers have just clicked "Delete" at this point and ignored you.

For those remaining:

The Original Poster, dmitrey, wants to copy caml syntax, because he
doesn't like brackets and commas.

The problem is that the expression:

name1 name2

is ambiguous. Does it mean name1(name2) or (name1, name2)? Add a third
name, and the ambiguity increases: there are now at least four ways to
interpret name1 name2 name3:

(name1, name2, name3)
(name1, name2(name3))
name1(name2, name3)
name1(name2(name3))

Dmitrey thinks that the third way is the "right" way to interpret the
proposed expression, just because it seems natural to him. But that is
illogical: it means that *different* parsing rules are applied to the
"name2 name3" part than to the "name1 *" part (where "*" stands in for
anything):

Dmitry wants "name1 *" to equal name1(*) which is fair enough as it
stands. But he wants to expand the * part, not by following the same rule,
but by following the different rule "name2 name3" => (name2, name3) and
form a tuple.

So what should "a b c d" be? 

(a, b, c, d)
a(b, c, d)
a(b, (c, d))
a(b(c, d))
a(b(c(d)))

Have I missed anything? Which is the "right" way? Who can tell?

Who can guess?

I don't know how caml resolves these ambiguities, or even if caml resolves
them, or if it is a good solution. But I propose that an even better
solution is to insist on EXPLICIT function calls and tuple construction,
that is to insist on brackets and commas.

In other words, to go back to Dmitry's original post where he wrote:

"it would reduce length of code lines and make them more readable"

I would change that to say "it would reduce length of code lines and make
them LESS readable and MORE ambiguous, leading to MORE bugs".


-- 
Steven.



From brojohan at hotmail.com  Tue Mar 13 16:23:06 2007
From: brojohan at hotmail.com (Bror Johansson)
Date: Tue, 13 Mar 2007 21:23:06 +0100
Subject: ActivePython 2.5.0.0 is now available
References: <mailman.5030.1173815941.32031.python-list@python.org>
Message-ID: <55ofh7F25cn50U1@mid.individual.net>


"Trent Mick" <trentm at activestate.com> skrev i meddelandet 
news:mailman.5030.1173815941.32031.python-list at python.org...
> I'm happy to announce that ActivePython 2.5.0.0 is now available for 
> download
> from:
>     http://www.activestate.com/products/activepython/
>
> This is the first release of ActivePython for Python version 2.5. 
> Apologies
> for the long delay between core Python 2.5 and this release. The good news 
> is
> that part of the reason for this delay was to finally get approval to 
> include
> crypto in ActivePython, hence:

I did notice the download earlier today and I have installed it on five 
Windows-machines (two WinXPPro and three Win2K) and have found one 
consistent error.

Whenever I try Help->Python Manuals from PythonWin I get this errormessage:

    "Internal error in help file processing <class 'pywintypes.error'>:(2, 
'ShellExecute', 'Det g?r inte att hitta filen.')

The last few words are swedish (the machine I'm using right here is arunning 
a swedish WinXP) and has this meaning: "It's not possible to find the file".

Is there a remedy for this problem?

Bror J. 




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 07:08:01 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 13:08:01 +0200
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174803233.118069.234290@l75g2000hse.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
Message-ID: <4607a991$0$23165$426a74cc@news.free.fr>

7stud a ?crit :
>> ...classes don't invoke the function directly, they convert it to
>> an 'unbound method' object::
(snip)
> 
>> If you really want to get to the original function, there are a couple
>> of options.  
> 
> No.  Just trying to figure out how some things work.

Most of Python's object model is documented here:

http://www.python.org/download/releases/2.2.3/descrintro/
http://users.rcn.com/python/download/Descriptor.htm


HTH



From psdasilvaX at esotericaX.ptX  Thu Mar 15 20:02:13 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 16 Mar 2007 00:02:13 +0000
Subject: Subclassing: what is wrong here?
Message-ID: <1174003302.156908@jubilee.claranet.pt>

Hi!

What's wrong with this way of subclassing?

from datetime import date

class MyDate(date):
	def __init__(self,year,month=None,day=None):
		if type(year) is str:
			# The whole date is here as a string
			year,month,day=map(int,string.split(year,'-'))
		if year<100:
			year+=2000
		date.__init__(self,year,month,day)

When I do
d=MyDate("2007-3-15")
I got
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: function takes exactly 3 arguments (1 given)

Thanks for any help.


From http  Sat Mar 10 18:26:13 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 15:26:13 -0800
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<7xr6rwhpdb.fsf@ruckus.brouhaha.com>
	<mailman.4922.1173568136.32031.python-list@python.org>
Message-ID: <7xhcssllyi.fsf@ruckus.brouhaha.com>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:
> Try again with "%u". Passing i or ui makes no difference, both push
> the  same value on the stack. C relies on the format string to
> interpret the  arguments.

If you use %u you get a very large positive value, not +3.


From attn.steven.kuo at gmail.com  Wed Mar 21 03:06:34 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 21 Mar 2007 00:06:34 -0700
Subject: Daylight saving time question
In-Reply-To: <6ZWLh.307$rd5.176@read3.inet.fi>
References: <6ZWLh.307$rd5.176@read3.inet.fi>
Message-ID: <1174460794.926689.194640@p15g2000hsd.googlegroups.com>

On Mar 20, 12:53 pm, Mr Pekka Niiranen <pekka.niira... at pp5.inet.fi>
wrote:
> Hi,
>
> is it possible to get the two annual daylight saving times
> (day, month and time) from Python by giving location
> in some country/location string ("Europe/Finland" for example).
>
> I need to ask country in program and calculate daylight
> saving times for the next few years onwards somehow like this:
>
> for y in range(2007, 2017):
>         (m1,d1,t1,m2,d2,t2) = daylight_change_epochs("Finland")
>
> -pekka-



A generator defined via recursion:

import dateutil.rrule, dateutil.tz
import datetime

mytz = dateutil.tz.tzfile("/usr/share/zoneinfo/Europe/Helsinki")

start = datetime.datetime(2007,1,1,0,0,0,tzinfo=mytz)
end = datetime.datetime(2017,1,1,0,0,0,tzinfo=mytz)

successively_finer = {
    dateutil.rrule.WEEKLY: dateutil.rrule.DAILY,
    dateutil.rrule.DAILY: dateutil.rrule.HOURLY,
    dateutil.rrule.HOURLY: dateutil.rrule.MINUTELY,
    dateutil.rrule.MINUTELY: dateutil.rrule.SECONDLY
}

# find week, then day, then hour, etc. that spans a change in DST

def sieve (start, end, freq):
    dstflag = start.timetuple()[-1]
    iter = dateutil.rrule.rrule(freq,dtstart=start,until=end)
    tprior = start
    for t in iter:
        if t.timetuple()[-1] != dstflag:
            dstflag = t.timetuple()[-1]
            if freq == dateutil.rrule.SECONDLY:
                yield tprior, t
            else:
                yield sieve(tprior, t,
successively_finer[freq]).next()
        tprior = t
    raise StopIteration

for before, after in sieve(start, end, dateutil.rrule.WEEKLY):
    print "%s => %s" % (
    before.strftime("%Y-%m-%d %H:%M:%S (%a) %Z"),
    after.strftime("%Y-%m-%d %H:%M:%S (%a) %Z"))


I get:

2007-03-25 02:59:59 (Sun) EET => 2007-03-25 03:00:00 (Sun) EEST
2007-10-28 02:59:59 (Sun) EEST => 2007-10-28 03:00:00 (Sun) EET
2008-03-30 02:59:59 (Sun) EET => 2008-03-30 03:00:00 (Sun) EEST
2008-10-26 02:59:59 (Sun) EEST => 2008-10-26 03:00:00 (Sun) EET
2009-03-29 02:59:59 (Sun) EET => 2009-03-29 03:00:00 (Sun) EEST
2009-10-25 02:59:59 (Sun) EEST => 2009-10-25 03:00:00 (Sun) EET
2010-03-28 02:59:59 (Sun) EET => 2010-03-28 03:00:00 (Sun) EEST
2010-10-31 02:59:59 (Sun) EEST => 2010-10-31 03:00:00 (Sun) EET
2011-03-27 02:59:59 (Sun) EET => 2011-03-27 03:00:00 (Sun) EEST
2011-10-30 02:59:59 (Sun) EEST => 2011-10-30 03:00:00 (Sun) EET
2012-03-25 02:59:59 (Sun) EET => 2012-03-25 03:00:00 (Sun) EEST
2012-10-28 02:59:59 (Sun) EEST => 2012-10-28 03:00:00 (Sun) EET
2013-03-31 02:59:59 (Sun) EET => 2013-03-31 03:00:00 (Sun) EEST
2013-10-27 02:59:59 (Sun) EEST => 2013-10-27 03:00:00 (Sun) EET
2014-03-30 02:59:59 (Sun) EET => 2014-03-30 03:00:00 (Sun) EEST
2014-10-26 02:59:59 (Sun) EEST => 2014-10-26 03:00:00 (Sun) EET
2015-03-29 02:59:59 (Sun) EET => 2015-03-29 03:00:00 (Sun) EEST
2015-10-25 02:59:59 (Sun) EEST => 2015-10-25 03:00:00 (Sun) EET
2016-03-27 02:59:59 (Sun) EET => 2016-03-27 03:00:00 (Sun) EEST
2016-10-30 02:59:59 (Sun) EEST => 2016-10-30 03:00:00 (Sun) EET

--
Hope this helps,
Steven



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 21 17:44:08 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 22:44:08 +0100
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174496172.528613.236730@p15g2000hsd.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1174496172.528613.236730@p15g2000hsd.googlegroups.com>
Message-ID: <46019eaf$0$30873$426a74cc@news.free.fr>

flit a ?crit :
> First I wanna thanks the all people who gives good contribution to
> this thread, thank you all..
> Now I have something more to say:
> 
> OK, that kind of answer is what I was trying to avoid..
> 
(snip half-angry answers to Steven)

Flit, whether you like the way Steven expresses itself or not, I think 
you should get over the tone and pay attention to *what* he actually says.

As a side note, and from a purely technical POV, the most reliable 
protection is to *not* distribute the code. IOW, make your app (or the 
critical parts of it) a web service. This is not an absolute protection, 
but that's the best you can get AFAICT.


From s.mientki at id.umcn.nl  Fri Mar 30 07:26:52 2007
From: s.mientki at id.umcn.nl (stef)
Date: Fri, 30 Mar 2007 13:26:52 +0200
Subject: Library for windows ini-files ?
Message-ID: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>

hello,

is there a Python library for easy reading and writing windows ini-files ?

thanks,
Stef Mientki


From collinstocks at gmail.com  Wed Mar  7 17:09:04 2007
From: collinstocks at gmail.com (Collin Stocks)
Date: Wed, 7 Mar 2007 17:09:04 -0500
Subject: Direct memory access
In-Reply-To: <4c0048df0703071404t39a14768p96f57b5e334e97a7@mail.gmail.com>
References: <4c0048df0703062040m15e310f2qe3b91f5499fbc07e@mail.gmail.com>
	<esn740$hve$1@sea.gmane.org>
	<4c0048df0703071404t39a14768p96f57b5e334e97a7@mail.gmail.com>
Message-ID: <4c0048df0703071409t1612a90nf9e909061e2830a5@mail.gmail.com>

One last thing. Does anyone know how to take a python object and measure how
much space it is taking up in memory? I'm thinking probably not, but it's
worth asking.
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From bbxx789_05ss at yahoo.com  Fri Mar 16 17:59:06 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 14:59:06 -0700
Subject: Executing a list of functions
In-Reply-To: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
References: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
Message-ID: <1174082346.152681.152970@o5g2000hsb.googlegroups.com>

lst = [a, b]

The () symbol causes the named function to execute, and a function
call in the code is always replaced by the function's return value.



From jonkersbart at gmail.com  Thu Mar  8 05:12:13 2007
From: jonkersbart at gmail.com (jonkersbart at gmail.com)
Date: 8 Mar 2007 02:12:13 -0800
Subject: splitting common functions into a sepperate module
In-Reply-To: <45efd90d$0$24707$426a74cc@news.free.fr>
References: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>
	<45efd90d$0$24707$426a74cc@news.free.fr>
Message-ID: <1173348733.037351.229990@64g2000cwx.googlegroups.com>

On 8 mrt, 10:36, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> jonkersb... at gmail.com a ?crit :
>
> > Dear,
>
> > I have wrote a script and want to group some functions of the script
> > in a separate modulo so that I can import the module in other scripts
> > and use the same functions there..
>
> > The problem is that the common functions need access to some global
> > variables defined in the script.
>
> And now you find out why globals are bad...
>
> > Python uses different namespaces for
> > different modules so I can't access the variables of the script in the
> > module.
>
> > What is the best solution to solve this problem?
>
> There's no one-size-fits-all answer. Usual solutions include:

I was hoping for a one-size-fits-all answer. But it seems to be that
it doesn't exists.
I already know these solutions, but was hoping for a better one.

> - passing the needed values as args to the functions
There are to many arguments so this is not a preferred solutions

> - wrapping the functions as methods of a class, passing the whole state
> as args to the class initializer.
I already considerate this one, but I don't like it because it is not
correct in terms of the object-oriented concept.
Because there are no other solutions I have to bury my bad feelings
and use this solution.

Thanks,
Bart




From cpblPublic at gmail.com  Wed Mar  7 21:39:21 2007
From: cpblPublic at gmail.com (C Barr Leigh)
Date: 7 Mar 2007 18:39:21 -0800
Subject: Bug in python!? persistent value of an optional parameter in function!
Message-ID: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>

Help! Have I found a serious bug?
This seems like highly undesired behaviour to me. From the program
below, I get output:

call1: ['sdf']
call2: ['Set within test for call2']
call3: ['Set within test for call2']

instead of what I should get,

call1: ['sdf']
call2: ['Set within test for call2']
call3: ['Set within test for call3']

I'm using Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02). The code is
below.


#!/usr/bin/python

def testPersistence(anarg,twooption=[]):
    #print anarg
    if not twooption:
        twooption.append('Set within test for '+anarg)
    print anarg +': '+str(twooption)

testPersistence('call1',twooption=['sdf']);
testPersistence('call2');
testPersistence('call3');



From gagsl-py2 at yahoo.com.ar  Mon Mar  5 20:03:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 Mar 2007 22:03:25 -0300
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
	<mailman.4595.1172792873.32031.python-list@python.org>
	<donn-B606A8.09385902032007@gnus01.u.washington.edu>
Message-ID: <op.toqs7zgvx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 Mar 2007 14:38:59 -0300, Donn Cave <donn at u.washington.edu>  
escribi?:

> In article <mailman.4595.1172792873.32031.python-list at python.org>,
>  "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:
>
>> On http://docs.python.org/lib/popen2-flow-control.html there are some
>> notes on possible flow control problems you may encounter.
>
> It's a nice summary of one problem, a deadlock due to full pipe
> buffer when reading from two pipes.  The proposed simple solution
> depends too much on the cooperation of the child process to be
> very interesting, though.  The good news is that there is a real
> solution and it isn't terribly complex, you just have to use select()
> and UNIX file descriptor I/O.  The bad news is that while this is
> a real problem, it isn't the one commonly encountered by first
> time users of popen.

More bad news: you can't use select() with file handles on Windows.

>> If you have no control over the child process, it may be safer to use a
>> different thread for reading its output.
>
> Right - `I used threads to solve my problem, and now I have two
> problems.'  It can work for some variations on this problem, but
> not the majority of them.

Any pointers on what kind of problems may happen, and usual solutions for  
them?
On Windows one could use asynchronous I/O, or I/O completion ports, but  
neither of these are available directly from Python. So using a separate  
thread for reading may be the only solution, and I can't see why is it so  
bad. (Apart from buffering on the child process, which you can't control  
anyway).

-- 
Gabriel Genellina



From bearophileHUGS at lycos.com  Wed Mar 28 13:50:57 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 28 Mar 2007 10:50:57 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175096255.850014.236570@p15g2000hsd.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
	<1175086435.174354.65640@l77g2000hsb.googlegroups.com>
	<1175096255.850014.236570@p15g2000hsd.googlegroups.com>
Message-ID: <1175104257.418601.100830@y80g2000hsf.googlegroups.com>

Kay Schluehr:
> RPython is heuristically defined as a subset of Python "static enough
> to be translatable to C". So it is actually static analysis that is
> done here, not on a local scale but on a simpler sublanguage. It is
> not clear to me whether for a sufficiently annotated Py3K program the
> inequation RPython != Python still holds?

You may also take a very good look at ShedSkin, it's already able to
compile a decent part of Python, and that part is slowly growing
still.
I'd like to see a comparison of SSPython and RPython (width-wise and
running speed wise too) :-)

Bye,
bearophile



From Emile.Boudreau at cognos.com  Tue Mar 20 14:18:01 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Tue, 20 Mar 2007 14:18:01 -0400
Subject: Subject line with smtplib.sendmail()
In-Reply-To: <09042D621CD4AA479C678463F3A646D0E884D5@sottemail1.ent.ad.cognos.com>
References: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com><etotbk$b1c$1@sea.gmane.org>
	<09042D621CD4AA479C678463F3A646D0E884D5@sottemail1.ent.ad.cognos.com>
Message-ID: <09042D621CD4AA479C678463F3A646D0E884E5@sottemail1.ent.ad.cognos.com>

Sorry folks. Scrape the last one that I sent. I noticed that it sends
the email perfectly if the code is not in any of my methods but the
second I insert it into a method I get the ugly email that I described
in my last email. 

Does anyone know how I can get this code in my method so that I have
access to all the variables I have?

thanks


Emile Boudreau

-----Original Message-----
From: python-list-bounces+emile.boudreau=cognos.com at python.org
[mailto:python-list-bounces+emile.boudreau=cognos.com at python.org] On
Behalf Of Boudreau, Emile
Sent: Tuesday, March 20, 2007 1:51 PM
To: python-list at python.org
Subject: RE: Subject line with smtplib.sendmail()

Thanks for the reply. When I use the instruction from that list this is
the email I receive. I'm using Outlook.

Working.on at server.com
To:
------------------------------
	From: Working.On at server.com
	To: Emile.Boudreau at server.com
	Subject: Hello!

	This Still DOESN't Work!!!!!!!!!!!!
	
It's just adding the "From" "To" "Subject" in the message itself. I want
to have each field at the correct place and then just the msg in the
body.

Any Help?? Thanks


Emile Boudreau


-----Original Message-----
From: python-list-bounces+emile.boudreau=cognos.com at python.org
[mailto:python-list-bounces+emile.boudreau=cognos.com at python.org] On
Behalf Of Fredrik Lundh
Sent: Tuesday, March 20, 2007 11:08 AM
To: python-list at python.org
Subject: Re: Subject line with smtplib.sendmail()

Boudreau, Emile wrote:

> I'm trying to send mail from my server to my machine with test 
> results. I can send the email no problem however, the email doesn't 
> contain a "recipient list" or a "subject line". I was wondering how 
> would I go about getting the information on the actual "To" and 
> "Subject" lines so that I know to whom the email was sent and the 
> subject line without opening the email?

you have to add the headers yourself.  see the example in the library
reference, or this FAQ entry:

    http://effbot.org/pyfaq/how-do-i-send-mail-from-a-python-script

</F> 



--
http://mail.python.org/mailman/listinfo/python-list
 
     This message may contain privileged and/or confidential
information.  If you have received this e-mail in error or are not the
intended recipient, you may not use, copy, disseminate or distribute it;
do not open any attachments, delete it immediately from your system and
notify the sender promptly by e-mail that you have done so.  Thank you.
--
http://mail.python.org/mailman/listinfo/python-list



From bbxx789_05ss at yahoo.com  Sat Mar 24 16:52:46 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 13:52:46 -0700
Subject: Python object overhead?
In-Reply-To: <mailman.5560.1174767588.32031.python-list@python.org>
References: <1174766882.119041.294020@y66g2000hsf.googlegroups.com>
	<mailman.5560.1174767588.32031.python-list@python.org>
Message-ID: <1174769566.154258.307250@y80g2000hsf.googlegroups.com>

On Mar 24, 2:19 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> Only one list is created.  It is used to define a C array where attributes
> will be stored.  Each instance still has that C array, but it has much less
> overhead than a Python list or dictionary.
>

It's all C underneath, right?  So a dictionary is what?  Two parallel
C arrays: one array with the names and one with the values?

When you do this:

__slots__ = ["m", "n"]

there still has to be a mapping between the names "m" and "n" and
their values.  So aren't two parallel C arrays required again?

> Whether this reduction in overhead actually results in a useful or measurable
> performance improvement is a separate question, of course.
>

I suppose a dictionary will be required to grow in size, so at
periodic intervals new, bigger arrays will need to be created, the
contents copied over, and the old arrays destroyed(similar to a
<vector> in C++).  And of course, the C code that accomplishes all
that creating, copying and destroying will take up some memory.

Is that what you are talking about when you say "overhead"?





From dant262 at yahoo.com  Thu Mar 22 12:48:17 2007
From: dant262 at yahoo.com (dant262 at yahoo.com)
Date: 22 Mar 2007 09:48:17 -0700
Subject: State of the Art Software Development Practices
Message-ID: <1174582097.414364.224690@e1g2000hsg.googlegroups.com>

Dan Turk
Colorado State University
26 Rockwell Hall
Fort Collins, CO 80523-1277
USA

March 22, 2007




My name is Dan Turk, and I am a faculty member in the Department of
Computer Information Systems at Colorado State University.  My
colleague, Leo Vijayasarathy, and I are conducting a study to better
understand the use of agile software development processes, methods,
and techniques, and the benefits and limitations associated with their
use.  About 2 years ago we performed a similar survey.  However, while
that survey was targeted solely at people who had already been
frequent users of agile processes, the current survey looks to draw
data from a larger segment of developers and has been updated for that
purpose.

Please consider participating in this study by completing a brief
survey posted at http://www.business.colostate.edu/leov/research/agile/start.cfm
.

A summary of the results will be posted to this group at the
conclusion of this study.

Your responses will be entirely anonymous and confidential.  The
survey does not collect any identifying information and cannot be
tracked to the person completing it.   General information about your
title and years of experience are requested only to build a profile of
the survey respondents.

Your participation in this study is voluntary.  There are no known
risks associated with taking part in it.  You may stop participating
at any time without penalty or loss of benefits to which you are
otherwise entitled.  If you have questions regarding your rights as a
volunteer in this research, please contact Janell Meldrem, Senior
Human Research Administrator, (970) 491-1563,
Janell.Meldrem at colostate.edu.

Thank you in advance for completing the survey and your contribution
to this research.   If you have any questions about the study or the
survey, please call me at 970-491-0467 or email me at
Dan.Turk at colostate.edu.

Sincerely,

Dan Turk, Ph.D.
Associate Professor of Computer Information Systems



From martinunsal at gmail.com  Mon Mar  5 11:18:11 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 5 Mar 2007 08:18:11 -0800
Subject: Project organization and import
In-Reply-To: <1173084337.538171.35530@c51g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
Message-ID: <1173111489.163974.89990@30g2000cwc.googlegroups.com>

On Mar 5, 12:45 am, "bruno.desthuilli... at gmail.com"
<bruno.desthuilli... at gmail.com> wrote:
> Remember that you can put code in
> the __init__.py of a package, and that this code can import sub-
> packages/modules namespaces, making the package internal organisation
> transparent to user code

Sure, but that doesn't solve the problem.

Say you have a package "widgets" with classes ScrollBar, Form, etc.
You want the end user to "import widgets" and then invoke
"widgets.ScrollBar()". As far as I know there are only two ways to do
this, both seriously flawed: 1) Put all your code in one module
widgets.py, 2) use "from scrollbar import *" in widgets/__init__.py,
which is semi-deprecated and breaks reload().

> Also remember that you can "import as", ie:
>
> import some_package.some_subpackage.some_module as some_module

Sure but that doesn't eliminate the unfortunate interaction between
Python class organization and filesystem heirarchy. For example, say
you want to organize the widgets package as follows:

widgets/scrollbar/*.py
widgets/form/*.py
widgets/common/util.py

Other than messing around with PYTHONPATH, which is horrible, I don't
see how to import util.py from the widget code.

> Bad form IMHO. Packages and module names should be all_lower,
> classnames CamelCased.

You're still stuck doing foo.Foo() everywhere in your client code,
which is ugly and wastes space, or using "from foo import *" which is
broken.

> > but I
> > believe this is categorically the wrong thing to do in large projects.
>
> Oh yes ? Why ?

For myriad reasons, just one of them being the one I stated -- smaller
files with one functional unit each are more amenable to source code
management with multiple developers.

We could discuss this till we're blue in the face but it's beside the
point. For any given project, architecture, and workflow, the
developers are going to have a preference for how to organize the code
structurally into files, directories, packages, etc. The language
itself should not place constraints on them. The mere fact that it is
supposedly "Pythonic" to put more functionality in one file indicates
to me that the Python package system is obstructing some of its users
who have perfectly good reasons to organize their code differently.

> > you're going to want files to contain the smallest
> > practical functional blocks. I feel pretty confident saying that "put
> > more stuff in one file" is the wrong answer, even if it is the
> > Pythonic answer.
>
> Is this actually based on working experience ? It seems that there are
> enough not-trivial Python projects around to prove that it works just
> fine.

Yes. I've worked extensively on several projects in several languages
with multi-million lines of code and they invariably have coding
styles that recommend one functional unit (such as a class), or at
most a few closely related functional units per file.

In Python, most of the large projects I've looked at use "from foo
import *" liberally.

I guess my question boils down to this. Is "from foo import *" really
deprecated or not? If everyone has to use "from foo import *" despite
the problems it causes, how do they work around those problems (such
as reloading)?

Martin



From bj_666 at gmx.net  Thu Mar  1 05:46:58 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 01 Mar 2007 11:46:58 +0100
Subject: class declaration shortcut
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
	<54nlkgF21ft8aU3@mid.individual.net>
Message-ID: <pan.2007.03.01.10.46.57.573434@gmx.net>

In <54nlkgF21ft8aU3 at mid.individual.net>, Bjoern Schliessmann wrote:

> Michele Simionato wrote:
>> On Mar 1, 9:40 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net>
>>> In <54msaoF21c6h... at mid.individual.net>, Bjoern Schliessmann
> 
>>>> But what's it (__name__) good for?
>>>
>>> As objects don't know to which name they are bound, that's a good
>>> way to give some information in stack traces or when doing
>>> introspection.
>> 
>> Also, the name is used by pickle to find the class of pickled
>> instances.
> 
> Mh. I suspect there's also more to it than I see now, but this
> __name__ seems quite useless to me. What if I rebind the class'
> name after definition?

Then it's a way to still get the name of the definition via `__name__`. 
Together with the name of the module where the definition took place which
is also available as attribute on the objects it is very useful to find
out where to look for the source code.  Just see the default `repr()` of
class objects.

> Or is it really just for some manual introspection? If it is, it seems a
> bit of an overkill to me.
>
>>>> class Spam(object):
> ...     pass
> ...
>>>> Ham = Spam
>>>> Spam = 0
>>>> test = Ham()
>>>> test.__class__
> <class '__main__.Spam'>

What would you expect this to look like if there weren't a __name__
attribute?

Ciao,
	Marc 'BlackJack' Rintsch


From csselo at gmail.com  Fri Mar 30 04:21:52 2007
From: csselo at gmail.com (csselo at gmail.com)
Date: 30 Mar 2007 01:21:52 -0700
Subject: Memory testing in Python
Message-ID: <1175242912.103313.99110@n59g2000hsh.googlegroups.com>

Hi all

I want to test my python code for memory efficiency in gnu/linux.How
can I do this?

thanks.



From aisaac at american.edu  Fri Mar  9 18:25:26 2007
From: aisaac at american.edu (Alan Isaac)
Date: Fri, 09 Mar 2007 23:25:26 GMT
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4813.1173388535.32031.python-list@python.org>
Message-ID: <G1mIh.25$qe5.19@trnddc05>

"Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message
news:mailman.4813.1173388535.32031.python-list at python.org...
> Sticking to spaces for indentation avoids the ambiguity of
> interpretation that ASCII TAB characters are subject to.

What ambiguity?
Tabs are *less* ambiguous.
One tab character is one level of indentation.
I have never seen this violated.

Users of spaces cannot even count
on shared code being 4 rather than 8 spaces.

Even though tabs when on this score, face it,
in the end it is pure preference.  There is no
"right" answer (even for emacs users).  ;-)

And my actual question remains unanswered...

Alan Isaac




From http  Sat Mar 17 03:17:04 2007
From: http (Paul Rubin)
Date: 16 Mar 2007 23:17:04 -0800
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<T9AKh.13297$tD2.11703@newsread1.news.pas.earthlink.net>
	<1hv3735.f8r5bx3czob7N%aleax@mac.com>
	<yxMKh.8126$M65.601@newssvr21.news.prodigy.net>
Message-ID: <7xslc49w5r.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
> 	Execution model: dynamic stack-type interpreter.

Erm, the iterator protocol makes the above a little more complicated.

>     Biggest headache is finding out what doesn't work in the libraries.

Good observation.


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 18:11:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 19:11:23 -0300
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<pan.2007.03.23.21.27.25.328509@freelance-developer.com>
Message-ID: <op.tpnw89ffx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 18:27:25 -0300, Mark Nenadov  
<mark at freelance-developer.com> escribi?:

> I'd suggest doing the following instead of that while loop:
>
> for line in open(sys.argv[1]).xreadlines():

Poor xreadlines method had a short life: it was born on Python 2.1 and got  
deprecated on 2.3 :(
A file is now its own line iterator:

f = open(...)
for line in f:
   ...

-- 
Gabriel Genellina



From khemkaamit at gmail.com  Thu Mar 29 08:30:55 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Thu, 29 Mar 2007 18:00:55 +0530
Subject: Weird behavior in search in a list
In-Reply-To: <6E125C32-13B7-4267-8CA3-6D2BF21D4F81@jedimindworks.com>
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
	<6E125C32-13B7-4267-8CA3-6D2BF21D4F81@jedimindworks.com>
Message-ID: <1360b7230703290530x3020980fg3e1b6f3c27a202f7@mail.gmail.com>

On 3/29/07, Michael Bentley <michael at jedimindworks.com> wrote:
>
> On Mar 29, 2007, at 6:51 AM, Su Y wrote:
> >
> > I want find the first number in extend[] which is larger than num, so

<snip>
> def find(num):
>         # check to make sure there *is* a value greater than num
>         if max(extend) > num:
>                 # then return the smallest value that is greater than num
>                 return min([x for x in extend if x > num])
>         else:
>                 return None

I think OP wants the first value in the list greater than 'num' not
the smallest greater value in the list.

cheers,
-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From bearophileHUGS at lycos.com  Sat Mar 17 17:15:15 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 17 Mar 2007 14:15:15 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174158002.730076.22720@y80g2000hsf.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
	<1174158002.730076.22720@y80g2000hsf.googlegroups.com>
Message-ID: <1174166115.263201.51840@d57g2000hsg.googlegroups.com>

Mark Dufour:
> FWIW, the original program can also be compiled with Shed Skin (http://
> mark.dufour.googlepages.com), an experimental (static-)Python-to-C++
> compiler, resulting in a speedup of about 8 times for a single test
> with 500 tuples.

If we want to play, then this is a literal translation to D (I am not
much good in D yet, so maybe there are ways to improve this code a
bit), as you can see D syntax isn't that bad (I think sometimes D
copies some Python syntax):


// Compile with:   dmd -O -release solver.d
import std.stdio, std.stream, std.string;

void main() {
    size_t sch;
    size_t[size_t] h;
    size_t[] q,w,e,r;

    int nrow = -1;
    auto datafile = new File("m4000.txt", FileMode.In);
    foreach(char[] row; datafile) {
        if (nrow == -1) {
            q.length = row.atoi();
            w.length = row.atoi();
            e.length = row.atoi();
            r.length = row.atoi();
        } else {
            char[][] srow = row.split();
            q[nrow] = srow[0].atoi();
            w[nrow] = srow[1].atoi();
            e[nrow] = srow[2].atoi();
            r[nrow] = srow[3].atoi();
        }
        nrow++;
    }

    foreach (x; q)
        foreach (y; w)
            h[x+y]++;

    foreach (x; e)
        foreach (y; r) {
            size_t* pointer = -x-y in h;
            if (pointer)
                sch += *pointer;
            // simpler but slower:
            // if (-x-y in h)
            //     sch += h[-x-y];
    }

    writefln(sch);
}


On my PC with the 1000 lines file this is about 2.2 times faster than
my  Psyco version and about 4.6 times faster than the same code
without Psyco.

Bye,
bearophile



From jantod at gmail.com  Sun Mar  4 05:03:23 2007
From: jantod at gmail.com (Janto Dreijer)
Date: 4 Mar 2007 02:03:23 -0800
Subject: multiple content-types break cgi.py
Message-ID: <1173002603.690853.250090@p10g2000cwp.googlegroups.com>

Hi!

The Nokia Java SDK allows one to define multiple content-types in a
single HTTP header field. I'm not sure if it's standard, but it's
happening from some Java-enabled phones.

This breaks the FieldStorage class in cgi.py by not causing
self.read_urlencoded() to be called at object init. Specifically when
one gets a type value like 'text/plain, application/x-www-form-
urlencoded'.

Hacking one of the lines from:
        if ctype == 'application/x-www-form-urlencoded':
            self.read_urlencoded()
to
        if 'application/x-www-form-urlencoded' in [s.strip() for s in
ctype.split(",")]:
            self.read_urlencoded()
makes it work as expected.

The only reference to this "bug" I can find dates back to 1999:
http://tinyurl.com/3ahc3r

Regards
Janto



From svenkat.cm at gmail.com  Fri Mar  2 06:18:24 2007
From: svenkat.cm at gmail.com (Venkat)
Date: 2 Mar 2007 03:18:24 -0800
Subject: Installation problem: Python 2.5 on solaris 8
Message-ID: <1172834304.930543.261920@h3g2000cwc.googlegroups.com>

I am very new to Python. I installed Python in Windows and learning
it. But i need to install Python on Solaris 8 to automate few things
as my build environment is on Solaris. When i tried to download python
2.5 source code and tried to compile i got the error saying
"configure: error: cannot compute sizeof (int), 77".

Between i am also getting parse errors for few files including
siginfo.h

/usr/include/sys/siginfo.h:74: parse error before `pthread_attr_t'
/usr/include/sys/siginfo.h:76: parse error before `}'
/usr/include/pthread.h:152: parse error before `*'
/usr/include/pthread.h:153: parse error before `*'
/usr/include/pthread.h:154: parse error before `*'
/usr/include/pthread.h:155: parse error before `*'
/usr/include/pthread.h:156: parse error before `*'
/usr/include/pthread.h:157: parse error before `*'
/usr/include/pthread.h:158: parse error before `*'
/usr/include/pthread.h:159: parse error before `*'
/usr/include/pthread.h:160: parse error before `*'
/usr/include/pthread.h:161: parse error before `*'
/usr/include/pthread.h:162: parse error before `*'
/usr/include/pthread.h:163: parse error before `*'
/usr/include/pthread.h:164: parse error before `*'
/usr/include/pthread.h:165: parse error before `*'
/usr/include/pthread.h:166: parse error before `*'
/usr/include/pthread.h:168: parse error before `*'
/usr/include/pthread.h:170: parse error before `*'
/usr/include/pthread.h:171: parse error before `void'
/usr/include/pthread.h:172: parse error before `*'
/usr/include/pthread.h:172: parse error before `)'
/usr/include/pthread.h:173: parse error before `void'
/usr/include/pthread.h:177: parse error before `int'
/usr/include/pthread.h:178: parse error before `int'
/usr/include/pthread.h:183: parse error before `*'
/usr/include/pthread.h:183: parse error before `)'
/usr/include/pthread.h:185: parse error before `const'
/usr/include/pthread.h:187: parse error before `pthread_self'
/usr/include/pthread.h:192: parse error before `*'
/usr/include/pthread.h:193: parse error before `*'
/usr/include/pthread.h:194: parse error before `*'
/usr/include/pthread.h:195: parse error before `*'
/usr/include/pthread.h:196: parse error before `*'
/usr/include/pthread.h:197: parse error before `*'


==
uname -m = sun4u
uname -r = 5.8
uname -s = SunOS
uname -v = Generic_108528-15

/usr/bin/uname -p = sparc
/bin/uname -X     = System = SunOS
Node = sword
Release = 5.8
KernelID = Generic_108528-15
Machine = sun4u
BusType = <unknown>
Serial = <unknown>
Users = <unknown>
OEM# = 0

==


Thanks a lot
-Venkat



From aleax at mac.com  Tue Mar  6 10:37:46 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 6 Mar 2007 07:37:46 -0800
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
	<1huivd7.7l18eh1paqp0aN%aleax@mac.com> <87k5xu37vt.fsf@gmail.com>
Message-ID: <1hujkzp.11vuf5x1a6yz2aN%aleax@mac.com>

Jorge Godoy <jgodoy at gmail.com> wrote:
   ...
> > My favorite way of working: add a test (or a limited set of tests) for
> > the new or changed feature, run it, check that it fails, change the
> > code, rerun the test, check that the test now runs, rerun all tests to
> > see that nothing broke, add and run more tests to make sure the new code
> > is excellently covered, rinse, repeat.  Occasionally, to ensure the code
> > stays clean, stop to refactor, rerunning tests as I go.
> 
> I believe this is a distinct case.  When we write tests we're worried with the
> system itself. 

Not sure I get what you mean; when I write tests, just as when I write
production code, I'm focused (not worried:-) about the application
functionality I'm supposed to deliver.  The language mostly "gets out of
my way" -- that's why I like Python, after all:-).


> When using the interactive interpreter we're worried with how
> to best use the language.  There might be some feature of the system related
> to that investigation, but there might be not.  For example: "what are the
> methods provided by this object?" or "which approach is faster for this loop?"

I do generally keep an interactive interpreter running in its own
window, and help and dir are probably the functions I call most often
there.  If I need to microbenchmark for speed, I use timeit (which I
find far handier to use from the commandline).  I wouldn't frame this as
"worried with how to best use the language" though; it's more akin to a
handy reference manual (I also keep a copy of the Nutshell handy for
exactly the same reason -- some things are best looked up on paper).


> I won't write a test case to test loop speed.  But I'd poke with the
> interpreter and if the environment gets a bit big to setup then I'd go to the
> text editor as I said. 

I don't really see "getting a bit big to setup" as the motivation for
writing automated, repeatable tests (including load-tests, if speed is
such a hot topic in your case); rather, the key issue is, will you ever
want to run this again?  For example, say you want to check the relative
speeds of approaches A and B -- if you do that in a way that's not
automated and repeatable (i.e., not by writing scripts), then you'll
have to repeat those manual operations exactly every time you refactor
your code, upgrade Python or your OS or some library, switch to another
system (HW or SW), etc, etc.  Even if it's only three or four steps, who
needs the aggravation?  Almost anything worth doing (in the realm of
testing, measuring and variously characterizing software, at least) is
worth automating, to avoid any need for repeated manual labor; that's
how you get real productivity, by doing ever less work yourself and
pushing ever more work down to your computer.


Alex


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 09:02:14 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 14:02:14 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <566vcfF27jlu4U1@mid.uni-berlin.de>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
Message-ID: <45fe89d4$0$24787$426a34cc@news.free.fr>

Diez B. Roggisch a ?crit :
> momobear schrieb:
>> hi, I am puzzled about how to determine whether an object is
>> initilized in one class, anyone could give me any instructions?
>> here is an example code:
>>
>> class coffee:
>>          def  boil(self):
>>                self.temp = 80
>>
>> a = coffer()
>> if a.temp > 60:
>>      print "it's boiled"
>>
>> in C++ language we must initilized a variable first, so there is no
>> such problem, but in python if we don't invoke a.boil(), we will not
>> get self.temp to be initilized, any way to determine if it's initilzed
>> before self.temp be used.
> 
> You want boil to be called __init__, which is python's constructor name. 

<nitpicking>
Actually, __init__ is the initializer. The proper constructor is __new__.
</nitpicking>



From ptmcg at austin.rr.com  Thu Mar 29 18:16:17 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 29 Mar 2007 15:16:17 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <1175200851.955161.169930@n76g2000hsh.googlegroups.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175200851.955161.169930@n76g2000hsh.googlegroups.com>
Message-ID: <1175206577.476047.139660@r56g2000hsd.googlegroups.com>

On Mar 29, 3:40 pm, irs... at gmail.com wrote:
> On Mar 29, 9:19 pm, aral... at aol.com wrote:
>
> > I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan
>
> Python's standard module "ai" has a function called
> "generateFakeReview". I believe it does what you want, but I haven't
> used it myself.

You are two days early... :)

-- Paul



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 21:56:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 23:56:37 -0300
Subject: Bug in python!? persistent value of an optional parameter in
	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
Message-ID: <op.tounsnm8x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 23:39:21 -0300, C Barr Leigh <cpblPublic at gmail.com>  
escribi?:

> Help! Have I found a serious bug?

Not at all! This is by design.

> def testPersistence(anarg,twooption=[]):
>     #print anarg
>     if not twooption:
>         twooption.append('Set within test for '+anarg)

See  
http://effbot.org/pyfaq/why-are-default-values-shared-between-objects.htm

-- 
Gabriel Genellina



From grante at visi.com  Fri Mar  2 10:29:47 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 02 Mar 2007 15:29:47 -0000
Subject: float64 print digits
References: <mailman.4601.1172832473.32031.python-list@python.org>
Message-ID: <12uggnbc2aqle77@corp.supernews.com>

On 2007-03-02, Ulrich Dorda <ulrich.dorda at cern.ch> wrote:
> I need a pytho nscript to read numbers(with loads of digits) from a 
> file, do some basic math on it and write the result out to another file.
>
> My problem: I don't get python to use more digits:
>
> In order to try this I type:
>
> The normal precision one:
> >>> from numpy import *
> >>> x=1.23456789123456789123456789
> >>> print "%35.25e" %x
>     1.2345678912345679000000000e+000
>
>
>     Now I try to use float64 to get more digits

You're already using 64 bit floats (which have about 15
significant digits).

> >>> z=zeros(3,float64)
> >>> z[0]
> 0.0
> >>> type(z[0])
><type 'numpy.float64'>
> >>> z[0]=1.23456789123456789123456789
> >>> type(z[0])
><type 'numpy.float64'>
> >>> print "%35.25e" %z[0]
>     1.2345678912345679000000000e+000
>
> This cuts the digits just like the 32bit case.

What 32-bit case?  A 32-bit float only has 7-8 significant
digits.

> Can anyone please help me get more digits?

Use the decimal module?

-- 
Grant Edwards                   grante             Yow!  What a
                                  at               COINCIDENCE! I'm an
                               visi.com            authorized "SNOOTS OF THE
                                                   STARS" dealer!!


From rpdooling at gmail.com  Thu Mar  1 15:39:54 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 1 Mar 2007 12:39:54 -0800
Subject: python equivalent of bash find
In-Reply-To: <mailman.4590.1172781076.32031.python-list@python.org>
References: <1172780082.961223.222500@s48g2000cws.googlegroups.com>
	<mailman.4590.1172781076.32031.python-list@python.org>
Message-ID: <1172781594.595648.320060@k78g2000cwa.googlegroups.com>

> You can probably replicate that using the modules os and shutil.

Thank you both for the quick response.

rd




From steve at REMOVEME.cybersource.com.au  Wed Mar  7 21:22:25 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 08 Mar 2007 13:22:25 +1100
Subject: is it possible to give an instance a value?
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
	<pan.2007.03.07.03.21.21.381410@REMOVEME.cybersource.com.au>
	<mailman.4753.1173281501.32031.python-list@python.org>
Message-ID: <pan.2007.03.08.02.22.25.527060@REMOVEME.cybersource.com.au>

On Wed, 07 Mar 2007 16:02:05 +0100, egbert wrote:

> On Tue, 06 Mar 2007 14:45:45 -0800, manstey wrote:
>> 
>> class Test(object):
>>      def __init__(self, val):
>>            self.val = val
>> 
>> a = Test('hello')
> 
>> Is there a way to make a have the value a.val when it is used as
>> above, or as an argument (eg function(a, 10, 'sdf') etc)?
>> 
> My impression is that you can do everything you want to
> by making your instance callable, and not using a but a().

You can't do this:

>>> a() = "some value"
SyntaxError: can't assign to function call


If you do this:

>>> a = "some value"

then we're back to the Original Poster's original problem.



-- 
Steven D'Aprano 



From parsons.nicholas1 at gmail.com  Sun Mar  4 07:42:22 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Sun, 4 Mar 2007 07:42:22 -0500
Subject: pop method question
In-Reply-To: <pan.2007.03.04.09.38.50.319215@gmx.net>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
	<pan.2007.03.04.09.38.50.319215@gmx.net>
Message-ID: <95D0B0A6-DB30-4D72-9397-881E53A9EDC4@gmail.com>


On Mar 4, 2007, at 4:38 AM, Marc 'BlackJack' Rintsch wrote:

> In <mailman.4638.1172976888.32031.python-list at python.org>, Nicholas
> Parsons wrote:
>
>> Just from my computer science background when I see pop(), I think  
>> of a
>> stack data structure.
>
> Then question your presumptions.  There are also many people thinking
> `list` must be something with nodes and pointers when they see the
> interface and usage of Python lists.

Good point :).

>
>> But then again, there are other examples of ambiguity in the python
>> language such as allowing operators like '+' to be overloaded.   
>> Why not
>> just have a "add()" method like Java?
>
> Why does this remove ambiguity?  I even would expect different  
> behaviour
> from both.  I expect the ``+`` operator to return either an  
> immutable or
> entirely new object, while `add()` can be something on containers that
> mutates the object.


This is true.  As long as the language (be it Java, Python, X) itself  
remains consistent over time, then this should be fine.

>
> Ciao,
> 	Marc 'BlackJack' Rintsch
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From cmfvulcanius at gmail.com  Thu Mar  8 11:12:27 2007
From: cmfvulcanius at gmail.com (cmfvulcanius at gmail.com)
Date: 8 Mar 2007 08:12:27 -0800
Subject: Reading a portion of a file
Message-ID: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>

I am using a script with a single file containing all data in multiple
sections. Each section begins with "#VS:CMD:command:START" and ends
with "#VS:CMD:command:STOP". There is a blank line in between each
section. I'm looking for the best way to grab one section at a time.
Will I have to read the entire file to a string and parse it further
or is it possible to grab the section directly when doing a read? I'm
guessing regex is the best possible way. Any help is greatly
appreciated.

Thanks



From waldemar.osuch at gmail.com  Tue Mar  6 20:46:12 2007
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: 6 Mar 2007 17:46:12 -0800
Subject: When will 2.5.1 be released?
In-Reply-To: <1173208347.506758.166620@30g2000cwc.googlegroups.com>
References: <1173037797.127119.248300@h3g2000cwc.googlegroups.com>
	<1173208347.506758.166620@30g2000cwc.googlegroups.com>
Message-ID: <1173231971.972435.186340@h3g2000cwc.googlegroups.com>

On Mar 6, 12:12 pm, "A. Lloyd Flanagan" <A.Lloyd.Flana... at gmail.com>
wrote:
> On Mar 4, 2:49 pm, "Nile" <diefi... at comcast.net> wrote:
>

> And while we're waiting for 2.5.1, can somebody post a clear (as
> opposed to the one that comes with Tix ;)) explanation of how to
> manually install Tix into python 2.5?  It should be possible...

Copying relevant files from 2.4 installation into corresponding
location in 2.5 worked for me.
>From what I remember I had to copy:
- <Python root>/tcl/tix8.1/*
- <Python root>/tcl/tix8184.lib
- <Python root>/DLLs/tix8184.dll



From joshbloom at gmail.com  Thu Mar  8 11:47:58 2007
From: joshbloom at gmail.com (Josh Bloom)
Date: Thu, 8 Mar 2007 09:47:58 -0700
Subject: IronPython with Apache
In-Reply-To: <1173308754.051978.62500@v33g2000cwv.googlegroups.com>
References: <1173308754.051978.62500@v33g2000cwv.googlegroups.com>
Message-ID: <d25b6e9a0703080847w17580d6ai71c7f5e2fa63ba35@mail.gmail.com>

Hi Ed,

Some more info about your environment will be helpful here.
What OS version, apache version, etc.

-Josh


On 7 Mar 2007 15:05:54 -0800, edfialk <edfialk at gmail.com> wrote:
>
> Hi all, I'm completely new to Python, but fairly experienced in PHP
> and few other languages.
>
> Long story short: The IronPython executable doesn't work for .cgi
> scripts in my browser.
>
>
> I've been assigned to write a service that pulls in parameters from
> the URL, accesses a file and serves some data through a CSV.  The only
> problem I foresee myself is accessing and reading this file, which is
> a 'hyper-cube' in that it has many dimensions of data.
>
> Anyway, the code for reading and writing this cube was already written
> by a coworker in IronPython and .NET.  Again, I'm totally new to
> Python but as I'm stepping through trying to pick out pieces that I
> need, I can't even import clr.
>
> So, I'm told I need IronPython, which I get, and I replace the #!c:
> \Python25\python.exe with the IronPython executable (#!c:
> \IronPython-1.0.1\ipy.exe), but I get a 500 Internal Server error and:
>
> "[Wed Mar 07 17:02:21 2007] [error] [client 127.0.0.1] malformed
> header from script. Bad header=  File , line 0, in __import__:
> testing.cgi" in the Error log.
>
> Does anyone know how to set up this 'IronPython' through Apache so I
> can use it to read/write data?
>
> Any help would be greatly appreciated.
> Thanks!
> -Ed
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From arnodel at googlemail.com  Sat Mar  3 15:04:33 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 3 Mar 2007 12:04:33 -0800
Subject: classes and functions
In-Reply-To: <mailman.4615.1172876431.32031.python-list@python.org>
References: <e416e10c0703021426h68e13d87qeab5a61d36980c2@mail.gmail.com>
	<mailman.4615.1172876431.32031.python-list@python.org>
Message-ID: <1172952273.482935.129850@8g2000cwh.googlegroups.com>

On Mar 2, 11:01 pm, Nicholas Parsons <parsons.nichol... at gmail.com>
wrote:
> Hi Claire,
>
> That is the beauty of using Python.  You have a choice of using  
> classes and traditional OOP techniques or sticking to top level  
> functions.  For short, small scripts it would probably be overkill to  
> use classes.  Yet the programmer still has classes in his tool chest  
> if he/she is writing code that is going to be reused in larger  
> projects.

Exactly the same thing can be said about Lisp, C++, Perl, PHP, and no
doubt many other languages that I don't know ;)
(Well I guess C++ programs are not called 'scripts')

--
Arnaud



From bdesth.quelquechose at free.quelquepart.fr  Tue Mar  6 08:50:11 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 14:50:11 +0100
Subject: Good handling of input data (was Re: Newbie question)
In-Reply-To: <pan.2007.03.06.13.04.50.941412@REMOVE.THIS.cybersource.com.au>
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<45EC579A.8090602@websafe.com>
	<mailman.4709.1173178667.32031.python-list@python.org>
	<pan.2007.03.06.13.04.50.941412@REMOVE.THIS.cybersource.com.au>
Message-ID: <45ed69af$0$6087$426a34cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Tue, 06 Mar 2007 05:57:43 -0500, Tommy Grav wrote:
> 
> 
>>So how would you handle this type of error handling?
>>My main problem is that occasionally there is an entry
>>in the list that is a string:
>>
>>0.9834 134.4933 78.009 run11 27
> 
> 
> How do you want to deal with such an occasional string? What do you expect
> the code to do?
> 
> The way I see it, if you're expecting five floats, and you get four floats
> and a string, that's an error. Do you ignore the entire line, or replace
> the string with zero, or what?
> 
> 
> 
>>Again I would like to avoid having to individually parse the 3 floats,
>>while still easily handling the string, but a list comprehension will
>>not work as far as I can tell. Is there a module that handles this
>>type of flat ascii tables? Something like:
>>
>>(x,y,z,id,n) = ParseFile("float","float","float","string","int")
>>
>>would be great, and I guess
>>
>>(x,y,z,id,n) = PaseFile2("%f %f %f %s %d")
>>
>>would be even better.
> 
> 
> How about this?
> 
> def parse_line(line, types):
>     items = line.split()
>     return [t(s) for (t, s) in zip(types, items)]
> 

Since the OP mention of last items being here "occasionnaly", I'd go for 
this instead (nb: ad-hoc implementation - yours is of course better as a 
general solution):

def parse_line(line, *types):
     items = line.split()
     return [t(s) for (s, t) in zip(items, types)]


My 2 cents


From jstroud at mbi.ucla.edu  Mon Mar 12 21:14:12 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Tue, 13 Mar 2007 01:14:12 GMT
Subject: attaching Tkinter Listbox to python list object
In-Reply-To: <1173746051.180729.97350@h3g2000cwc.googlegroups.com>
References: <1173746051.180729.97350@h3g2000cwc.googlegroups.com>
Message-ID: <EVmJh.9487$jx3.121@newssvr25.news.prodigy.net>

Steve Potter wrote:
> I am trying to find some method of attaching a Listbox object to a
> list object so as the contents of the list are changed the contents of
> the Listbox will be updated to match.  I have found a few references
> to something like this in this old post
> http://groups.google.com/group/comp.lang.python/browse_thread/thread/3a6fe7534c812f55/43f201ab53cfdbf7
> as well as here http://effbot.org/zone/wck-4.htm .
> 
> It just seems that there should be some way of achieving this.
> 
> The only this I can think of is create a subclass of list that deletes
> and then refills the Listbox every time that the list changes, but
> this seems very in efficient.
> 
> 
> Any ideas?
> 
> Steve
> 

If you want the listbox to have the interface of a list, you will 
probably not want to do it by inheritance because you are going to have 
to re-write a lot of methods anyway, calling super, etc.

Probably better is composition in this case, even though inheritance 
feels like the right way if you haven't tried it yet and discovered its 
problems.

Inherit from object and fill the class with objects designed for the 
job. In fact, make sure you want to abstract your data structure to list 
before you even use that--then create a controller that retrieves 
appropriate info from the data structure (model) and updates the listbox 
(view) accordingly. Use callbacks from the listbox to notify the 
controller if the events in the listbox require modification of the 
list. Have the controller modify the list and then use the modified list 
to update the listbox.

This is more-or-less MVC. MVC can be as simple as listbox, list, object, 
or more complicated. But you will be happy you began with an MVC design 
at some point in the future. You'll really be happy that you didn't 
inherit from list for this!

I've looked into the listbox issue and I have found that you will have 
to delete and refill the listbox every time the list is changed. I 
wouldn't worry about speed, though, your computer will keep up with the 
user, no problem. If you look into other GUI frameworks, you'll find 
that they all seem to delete and refill at some level. Its just with 
Tkinter, you have to do this explicitly, which never feels quite right.

James


From alan.franzoni_invalid at geemail.invalid  Wed Mar  7 08:29:29 2007
From: alan.franzoni_invalid at geemail.invalid (Alan Franzoni)
Date: Wed, 7 Mar 2007 14:29:29 +0100
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
	<45E8FADB.7000902@cosc.canterbury.ac.nz>
	<1rgq149m7oern$.1080aifmn5qo8$.dlg@40tude.net>
	<mailman.4702.1173156968.32031.python-list@python.org>
Message-ID: <1fenbu7prg0bm.3q5rj5s6vex4$.dlg@40tude.net>

Il Tue, 06 Mar 2007 01:55:54 -0300, Gabriel Genellina ha scritto:


> The problem is that other people -not necesarily "smarter and more  
> experienced" than you- may use those features, and perhaps you have to  
> read, understand and modify some code written by someone else.
> So, you should at least know what "a += b" means, even if you are not  
> going to use it.

That's sure, and I'm in fact glad to know that by now. I still think it's
risky, BTW. Python is dynamically typed, after all, and there's no 'a
priori' way to know if 'a' is a list or another type, especially another
container type.

If we rely on duck typing, by the way, we may encounter two types quacking
like ducks, flying like ducks, but in fact acting as slightly different
ducks. I should remember as well, when designing a container type that I
want to use in place of a list, to carefully craft an __iadd__ method which
works just like the a list's own __iadd__ method; if I forget, I may
introduce a subtle error. 


-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From fsckedagain at gmail.com  Wed Mar 28 13:40:59 2007
From: fsckedagain at gmail.com (fscked)
Date: 28 Mar 2007 10:40:59 -0700
Subject: XML/encoding/prolog/python hell...
Message-ID: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>

I am a beginning pythoner and I am having a terrible time trying to
figure out how to do something that (it would seeme to me) should be
fairly simple.

I have a CSV file of unknown encoding and I need to parse that file to
get the fields <--- DONE
I need to create an xml document that has the proper prolog and
namespace information in it. <--- NOT DONE
I need it to be encoded properly<--- Looks right in IE, not right in
any other app.

I should say that I have googled my butt off, tried ElementTree,
CSV2XML, and various other things and cannot get any of them to work.

A sample of the output I am looking for is as follows:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns2:boxes xmlns:ns2="Boxes">
	<ns2:box id="9" mac="333333" d_a="2006" hw_ver="v1.1" sw_ver="3"
pl_h="No Data" name="Lounge" address="here" phone="555-5555"
country="US" city="LA"/>
	<ns2:box id="7" mac="444444" d_a="2005" hw_ver="v1.0" sw_ver="3"
pl_h="No Data" name="MyHouse" address="there" phone="555-5556"
country="US" city="New York"/>
</ns2:boxes>

Is there some fundamental thing I am not getting? I cannot get
'tostrings' to work in ElementTree and I cannot figure the prolog out.

I posted a similar message back in January, but haven't had much luck.

PS
No I haven't been trying to do this since January, more important
things came up at work and I have just revived this. :)



From gagsl-py2 at yahoo.com.ar  Sun Mar 18 23:41:53 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 00:41:53 -0300
Subject: 4 bytes to int
References: <969033cd0703181904j2b3e8743m638de5f1bbeef980@mail.gmail.com>
Message-ID: <op.tpe273l3x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 18 Mar 2007 23:04:44 -0300, Andres Martinelli <andmarti at gmail.com>  
escribi?:

> My simple question is:
> I have an array of 4 bytes, and I want to convert it to the int they  
> form.

You can use the struct module:

py> struct.unpack("i", "\x00\x00\x01\x00")
(65536,)

That's good if you have a string to start from. If your "array of 4 bytes"  
is actually an array.array object, you can get the string using the  
tostring method.
If your 4 bytes are in another format, maybe this function is more  
convenient:

py> def int_from_bytes(b3, b2, b1, b0):
...   "Builds an unsigned int (32bits) from 4 bytes, b3 being the most  
significa
nt byte"
...   return (((((b3 << 8) + b2) << 8) + b1) << 8) + b0
...
py> int_from_bytes(0, 0, 0, 0)
0
py> int_from_bytes(0, 0, 0, 10)
10
py> int_from_bytes(0, 0, 1, 0)
256
py> int_from_bytes(0, 0, 255, 255)
65535
py> int_from_bytes(127, 255, 255, 255)
2147483647
py> int_from_bytes(255, 255, 255, 255)
4294967295L

-- 
Gabriel Genellina



From J.Fine at open.ac.uk  Wed Mar  7 08:52:08 2007
From: J.Fine at open.ac.uk (Jonathan Fine)
Date: Wed, 7 Mar 2007 13:52:08 -0000
Subject: distutils - how to get more flexible configuration
Message-ID: <esmg28$c1b$1@south.jnrs.ja.net>

Hello

I'm writing a package that has cgi-bin scripts, html
files and data files (templates used by cgi scripts).
I find that using distutils in the standard way
does not give me enough flexibilty, even if I use
a setup.cfg.

For example, I want certain data files to go to
markedly different locations.

However, I have come up with a solution, that looks
like it will work for me, and I'd welcome comments.

Here's the MANIFEST file
===
setup.py
myproj_cfg.py
data/wibble.txt
data/wobble.txt
===

And here's the setup.py file I've written
===
from distutils.core import setup
import myproj_cfg

data_files = [
    (myproj_cfg.wibble, ['data/wibble.txt']),
    (myproj_cfg.wobble, ['data/wobble.txt']),
    ]

setup(data_files=data_files)
===

The user is asked to create a myproj_cfg.py file,
which might look like
===
wibble = '/wibble'
wobble = '/wobble'
===

And when a distribution is created and installed
we get
===
$ python setup.py install
running install
running build
running install_data
creating /wibble
copying data/wibble.txt -> /wibble
creating /wobble
copying data/wobble.txt -> /wobble
===

This is an example of what I want.  I'd welcome
your comments.

-- 
Jonathan Fine
The Open University, Milton Keynes, England




From ptmcg at austin.rr.com  Thu Mar 22 11:51:16 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 22 Mar 2007 08:51:16 -0700
Subject: Regexp problem with `('
In-Reply-To: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
References: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
Message-ID: <1174578676.330942.62520@e1g2000hsg.googlegroups.com>

On Mar 22, 3:26 am, "Johny" <pyt... at hope.cz> wrote:
> I have  the following text
>
> <title>Goods Item  146 (174459989)  - OurWebSite</title>
>
> from which I need to extract
> `Goods Item  146 '
>
> Can anyone help with regexp?
> Thank you for help
> L.
Here's the immediate answer to your question.


import re
src = "<title>Goods Item  146 (174459989)  - OurWebSite</title>"
pattern = r"<title>(.*)\("
re.search(pattern,src).groups()[0]


I post it this way so that you can relate the re to your specific
question, and then maybe apply this to whatever else you are scraping
from this web page.

Please don't follow up with a post asking how to extract "45","Rubber
chicken" from "<tr><td>45</td><td>Rubber chicken</td></tr>".  At this
point, you should try a little experimentation on your own.

-- Paul



From aleax at mac.com  Sat Mar  3 21:18:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 18:18:50 -0800
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
Message-ID: <1huevw6.dponjy1xld045N%aleax@mac.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
   ...
> while some_dict:
>     do_something_with(some_dict.pop()) 
> 
> doesn't work. Instead you have to write this:

You have to use .popitem for this -- that's what's it's for...


Alex


From ncalexander at gmail.com  Sun Mar  4 19:22:08 2007
From: ncalexander at gmail.com (Nick Alexander)
Date: 4 Mar 2007 16:22:08 -0800
Subject: How to set docstrings for extensions supporting PyNumberMethods?
In-Reply-To: <1172996063.517322.208220@j27g2000cwj.googlegroups.com>
References: <1172948422.661418.312560@8g2000cwh.googlegroups.com>
	<1172996063.517322.208220@j27g2000cwj.googlegroups.com>
Message-ID: <1173054128.726010.203120@h3g2000cwc.googlegroups.com>

On Mar 4, 12:14 am, "Ziga Seilnacht" <ziga.seilna... at gmail.com> wrote:
> NickAlexanderwrote:
> > Hello,
>
> > I am writing a python extension (compiled C code) that defines an
> > extension type with PyNumberMethods.  Everything works swimmingly,
> > except I can't deduce a clean way to set the docstring for tp_*
> > methods.  That is, I always have
>
> > type.__long__.__doc__ == 'x.__long__() <==> long(x)'
>
> > which a quick glance at the Python 2.5 source shows is the default.
>
> > I have found that I can use PyObject_GetAttr and PyWrapperDescrObject
> > and set the descriptor objects d_base->doc to a char pointer... but I
> > can't tell if this is safe.  Or the right way to do it.
>
> > If I'm on the wrong list, please let me know!
> > Thanks,
> >NickAlexander
>
> I think that the right way is to add the methods to the tp_methods
> slot and use METH_COEXIST in the PyMethodDef flags field. Example:

Ziga, thanks for an extremely helpful reply.  I'll experiment and post
again if there are issues.

Cheers!
Nick



From ckkart at hoc.net  Mon Mar 26 22:48:30 2007
From: ckkart at hoc.net (Christian)
Date: Tue, 27 Mar 2007 11:48:30 +0900
Subject: build python on Celeron D
Message-ID: <eua0l8$po1$1@sea.gmane.org>

Hi,
I'm having problems with python 2.4.4 built on a Celeron D. I had problems
earlier with that processor which I think has understands some 64 bit
instructions (whatever that means) but is still 32 bit. Thus when e.g. trying to
build numpy with the self built python I get that error:

Traceback (most recent call last):
  File "setup.py", line 89, in ?
    setup_package()
  File "setup.py", line 59, in setup_package
    from numpy.distutils.core import setup
  File "/mnt/home/ck/prog/scipy/numpy-1.0.1/numpy/__init__.py", line 36, in ?
  File "numpy/core/__init__.py", line 5, in ?
    import multiarray
ImportError:
/media/hda6/home/ck/prog/scipy/numpy-1.0.1/numpy/core/multiarray.so: undefined
symbol: Py_InitModule4

which is related to 32<->64 issues, right?

So my question is how do I force python to be built with 32bit?

Christian



From gagsl-py2 at yahoo.com.ar  Tue Mar 20 19:29:35 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 20:29:35 -0300
Subject: mysterious unicode
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
Message-ID: <op.tpigvli0x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 19:35:00 -0300, Gerry <gerard.blais at gmail.com>  
escribi?:

> which seems to work.  Here's the mysterious part (aside from why
> anything was unicode in the first place):
>
>                 print >> debug, "c=", col, "r=", row, "v=", value,
> "qno=", qno
>                 tuple = (qno, family)
>                 try:
>                     data[tuple].append(value)
>                 except:
>                     data[tuple] = [value]
>                 print >> debug, "!!!", col, row, qno, family, tuple,
> value, data[tuple]
>
> which produces:
>
> c= 1 r= 3 v= 4 qno= Q1
> !!! 1 3 Q1 O (u'Q1', 'O') 4 [1, u' ', 4]
>
> where qno seems to be a vanilla Q1, but a tuple using qno is
> (u'Q1', ...).

I bet qno was unicode from start. When you print an unicode object, you  
get the "unadorned" contents. When you print a tuple, it uses repr() on  
each item.

py> qno = u"Q1"
py> qno
u'Q1'
py> print qno
Q1
py> print (qno,2)
(u'Q1', 2)

-- 
Gabriel Genellina



From aahz at pythoncraft.com  Sat Mar  3 19:17:40 2007
From: aahz at pythoncraft.com (Aahz)
Date: 3 Mar 2007 16:17:40 -0800
Subject: thread safe SMTP module
References: <mailman.4616.1172878783.32031.python-list@python.org>
Message-ID: <esd374$927$1@panix3.panix.com>

In article <mailman.4616.1172878783.32031.python-list at python.org>,
Gordon Messmer  <gmessmer at u.washington.edu> wrote:
>
>I believe that I've seen this discussed previously, so maybe there's
>some interest in it.  I wrote a threaded mail filtering framework
>a while ago, and one of the modules does address verification
>via SMTP.  Since smtplib.SMTP uses blocking IO, it can block the
>whole interpreter.  Sometimes the whole thing would stop working
>indefinitely.

That doesn't make any sense.  Blocking I/O generally releases the GIL,
which is the whole reason Python doesn't totally suck for threading.
There may be other thread problems, but I doubt that you have correctly
analyzed their source.  You can prove this for yourself by trying out my
threaded spider at
http://www.pythoncraft.com/OSCON2001/ThreadPoolSpider.py
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From lbates at websafe.com  Tue Mar 27 12:35:24 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 27 Mar 2007 11:35:24 -0500
Subject: Zip file writing progress (callback proc)
In-Reply-To: <mailman.5627.1174916476.32031.python-list@python.org>
References: <mailman.5627.1174916476.32031.python-list@python.org>
Message-ID: <8d-dnZKQwMZX2pTbnZ2dnUVZ_ruknZ2d@comcast.com>

durumdara wrote:
> Hi!
> 
> I want to check my zip file writings.
> I need some callback procedure to show a progress bar.
> Can I do that?
> I don't want to modify the PyLib module to extend it, because if I get
> another py, the changes are lost.
> This happening too if I copy the zip module to modify it.
> Any solution?
> 
> Thanks for it:
>    dd

I did this by extending the write method of my zipfile module.

1) Add a callback= keyword argument to __init__ and saving that in
an instance variable (self._callback).

    def __init__(self, file, mode="r", compression=ZIP_STORED,
                 allowZip64=False, callback=None):

        """Open the ZIP file with mode read "r", write "w" or append "a"."""
        self._allowZip64 = allowZip64
        self._didModify = False
        self._callback = callback  # new instance variable to be used in write




2) Change write method so that it calls the progress method of the callback
function after every block is written (if user passed in one).

        while 1:
            buf = fp.read(1024 * 8)
            if not buf:
                break
            file_size = file_size + len(buf)
            #-----New lines follow
	    #
            # Call the progress method of the callback function (if defined)
            #
            if self._callback is not None:
                self._callback.progress(st.st_size, fp.tell())

	    #-----End of new lines
            CRC = binascii.crc32(buf, CRC)
            if cmpr:
                buf = cmpr.compress(buf)
                compress_size = compress_size + len(buf)
            self.fp.write(buf)



3) Define a callback class and use it:

import zipfile

class CB():
    def progress(self, total, sofar):
        zippercentcomplete=100.0*sofar/total
        print "callback.progress.zippercentcomplete=%.2f" % zippercentcomplete
        return

z=zipfile.ZipFile(r'C:\testzip.zip', mode='w', callback=CB())
z.write(r'c:\Library\TurboDelphi\TurboDelphi.exe')

At least by doing it this way you won't break anything if you get a new zipfile
module.  It just won't show progress any more and then you can patch it.

Hope info helps.

-Larry Bates


From MonkeeSage at gmail.com  Mon Mar  5 22:30:07 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 19:30:07 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <7xmz2r83ed.fsf@ruckus.brouhaha.com>
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<7xk5xvgo55.fsf@ruckus.brouhaha.com>
	<1173149481.694255.23350@n33g2000cwc.googlegroups.com>
	<7x7itvt6nw.fsf@ruckus.brouhaha.com>
	<1173150785.768534.286700@8g2000cwh.googlegroups.com>
	<7xmz2r83ed.fsf@ruckus.brouhaha.com>
Message-ID: <1173151807.570677.141310@h3g2000cwc.googlegroups.com>

On Mar 5, 9:19 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> OK, I didn't read the question that way.  I thought the person just
> wanted a yes or no answer to whether the list contained any elements
> outside the desired range.  If the purpose is to select the elements
> in the range, then use filter/ifilter or a different listcomp/genexp:
>
>    inrange = [x for x in ll if 0<=x<=maxnum]

Well, the OP didn't actually specify what behavior they wanted. I was
just trying to go the with broadest case, with arbitrary values.

Regards,
Jordan



From bbxx789_05ss at yahoo.com  Mon Mar 19 12:54:55 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 19 Mar 2007 09:54:55 -0700
Subject: * operator--as in *args?
In-Reply-To: <mailman.5260.1174269168.32031.python-list@python.org>
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
	<1174254032.155494.228530@e65g2000hsc.googlegroups.com>
	<1174266469.127020.186120@l77g2000hsb.googlegroups.com>
	<1hv6o86.18ve0cc11prsg8N%aleax@mac.com>
	<mailman.5260.1174269168.32031.python-list@python.org>
Message-ID: <1174323295.244565.34740@b75g2000hsg.googlegroups.com>

On Mar 18, 7:52 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> def f(*args, **kw):
>
> ...   print "args",args
> ...   print "kw",kw
> ...>>> d = {"a":1, "b":2, "c":3}
> >>> f(**d)
>
Whoa! **?  And applied to a function parameter?  Back to the drawing
board.

On Mar 18, 7:21 pm, a... at mac.com (Alex Martelli) wrote:
> More generally, with any iterable x, the *x
> construct in function call will pass as positional arguments exactly
> those items which (e.g.) would be printed by the loop:
>     for item in x: print x
>

Thanks.

On Mar 18, 7:52 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> def f(*args, **kw):
>
> ...   print "args",args
> ...   print "kw",kw
> ...>>> d = {"a":1, "b":2, "c":3}
> >>> f(**d)
>
Whoa! **?  And applied to a function parameter name?  Back to the
drawing board.

The following is what I discovered for anyone else that is interested:

More on Defining Functions(GvR tutorial, section 4.7)
--Keyword Argument Lists
--Arbitrary Argument Lists
--Unpacking Argument Lists

1) Applying ** to a function parameter:

def g(a, b, **xtraArgs):
    print xtraArgs
g(b=20, c="big", a="hello", d=10)

#output: {'c': 'big', 'd': 10}

**xtraArgs will be a dictionary of all arguments sent to the function
with the syntax "keyword=value" if the keyword does not match any of
the function parameter names.

2)Applying * to a function parameter:

def g(a, *xtraArgs):
    print xtraArgs
g(10, 20, 30, 40)

#output: (20, 30, 40)

*xtraArgs will be a tuple containing all arguments sent to the
function with the syntax "value" that do not match any function
parameter.

3) A function parameter with the syntax *xtraArgs1 must come before a
function parameter with the syntax **xtraArgs2:

def g(a, b, *xtraArgs1, **xtraArgs2):
    print xtraArgs1
    print xtraArgs2

g(10, 20, 30, 35, d=40, e="hello")

#(30, 35)
#{'e': 'hello', 'd': 40}

4) Using * to unpack a list, tuple, etc.(any iterable collection--see
earlier posts):

def g(a, b, c):
    print a,b,c

tpl = (1, 2, 3)
g(*tpl)

#output: 1 2 3

5) Using ** to unpack dictionaries:

def g(a, b, c):
    print a,b,c

dict = {"b":"world", "c":"goodbye", "a":"hello"}
g(**dict)

#output: hello world goodbye







From gregpinero at gmail.com  Thu Mar  1 13:36:12 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 1 Mar 2007 10:36:12 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <1172771161.015437.50000@n33g2000cwc.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
Message-ID: <1172774172.389220.124170@j27g2000cwj.googlegroups.com>

On Mar 1, 12:46 pm, "Bart Ogryczak" <B.Ogryc... at gmail.com> wrote:
> > This solution looks nice, but how does it work?  I'm guessing
> > struct.unpack will provide me with 8 bit bytes
>
> unpack with 'B' format gives you int value equivalent to unsigned char
> (1 byte).
>
> > (will this work on any system?)
>
> Any system with 8-bit bytes, which would mean any system made after
> 1965. I'm not aware of any Python implementation for UNIVAC, so I
> wouldn't worry ;-)
>
> > How does count1 work exactly?
>
> 1,2,4,8,16,32,64,128 in binary are
> 1,10,100,1000,10000,100000,1000000,10000000
> x&1 == 1 if x has first bit set to 1
> x&2 == 2, so (x&2>0) == True if x has second bit set to 1
> ... and so on.
> In the context of int, True is interpreted as 1, False as 0.

Thanks Bart.  That's perfect.  The other suggestion was to precompute
count1 for all possible bytes, I guess that's 0-256, right?

Thanks again everyone for the help.

-Greg



From nick at craig-wood.com  Tue Mar 27 04:30:05 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 27 Mar 2007 03:30:05 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<1174958444.273725.15710@o5g2000hsb.googlegroups.com>
Message-ID: <slrnf0hj6p.php.nick@irishsea.home.craig-wood.com>

Klaas <mike.klaas at gmail.com> wrote:
>  On Mar 26, 3:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> > Did anyone write a contextmanager implementing a timeout for
> > python2.5?
> >
> > I'd love to be able to write something like
> >
> >     with timeout(5.0) as exceeded:
> >         some_long_running_stuff()
> >     if exceeded:
> >         print "Oops - took too long!"
> >
> > And have it work reliably and in a cross platform way!
> 
>  Doubt it.  But you could try:
> 
>  class TimeoutException(BaseException):
>     pass
> 
>  class timeout(object):
>     def __init__(self, limit_t):
>         self.limit_t = limit
>         self.timer = None
>         self.timed_out = False
>     def __nonzero__(self):
>         return self.timed_out
>     def __enter__(self):
>         self.timer = threading.Timer(self.limit_t, ...)
>         self.timer.start()
>         return self
>     def __exit__(self, exc_c, exc, tb):
>         if exc_c is TimeoutException:
>            self.timed_out = True
>            return True # suppress exception
>         return False # raise exception (maybe)
> 
>  where '...' is a ctypes call to raise the given exception in the
>  current thread (the capi call PyThreadState_SetAsyncExc)
> 
>  Definitely not fool-proof, as it relies on thread switching.  Also,
>  lock acquisition can't be interrupted, anyway.  Also, this style of
>  programming is rather unsafe.
> 
>  But I bet it would work frequently.

Here is my effort...  You'll note from the comments that there are
lots of tricky bits.

It isn't perfect though as it sometimes leaves behind threads (see the
FIXME).  I don't think it crashes any more though!

------------------------------------------------------------

"""
General purpose timeout mechanism not using alarm(), ie cross platform

Eg

from timeout import Timeout, TimeoutError

def might_infinite_loop(arg):
    while 1:
        pass

try:
    Timeout(10, might_infinite_loop, "some arg")
except TimeoutError:
    print "Oops took too long"
else:
    print "Ran just fine"

"""

import threading
import time
import sys
import ctypes
import os

class TimeoutError(Exception):
    """Thrown on a timeout"""
PyThreadState_SetAsyncExc = ctypes.pythonapi.PyThreadState_SetAsyncExc
_c_TimeoutError = ctypes.py_object(TimeoutError)

class Timeout(threading.Thread):
    """
    A General purpose timeout class
    timeout is int/float in seconds
    action is a callable
    *args, **kwargs are passed to the callable
    """
    def __init__(self, timeout, action, *args, **kwargs):
        threading.Thread.__init__(self)
        self.action = action
        self.args = args
        self.kwargs = kwargs
        self.stopped = False
        self.exc_value = None
        self.end_lock = threading.Lock()
        # start subtask
        self.setDaemon(True)                # FIXME this shouldn't be needed but is, indicating sub tasks aren't ending
        self.start()
        # Wait for subtask to end naturally
        self.join(timeout)
        # Use end_lock to kill the thread in a non-racy
        # fashion. (Using isAlive is racy).  Poking exceptions into
        # the Thread cleanup code isn't a good idea either
        if self.end_lock.acquire(False):
            # gained end_lock => sub thread is still running
            # sub thread is still running so kill it with a TimeoutError
            self.exc_value = TimeoutError()
            PyThreadState_SetAsyncExc(self.id, _c_TimeoutError)
            # release the lock so it can progress into thread cleanup
            self.end_lock.release()
        # shouldn't block since we've killed the thread
        self.join()
        # re-raise any exception
        if self.exc_value:
            raise self.exc_value
    def run(self):
        self.id = threading._get_ident()
        try:
            self.action(*self.args, **self.kwargs)
        except:
            self.exc_value = sys.exc_value
        # only end if we can acquire the end_lock
        self.end_lock.acquire()

if __name__ == "__main__":
    
    def _spin(t):
        """Spins for t seconds"""
        start = time.time()
        end = start + t
        while time.time() < end:
            pass

    def _test_time_limit(name, expecting_time_out, t_limit, fn, *args, **kwargs):
        """Test Timeout"""
        start = time.time()
        
        if expecting_time_out:
            print "Test",name,"should timeout"
        else:
            print "Test",name,"shouldn't timeout"

        try:
            Timeout(t_limit, fn, *args, **kwargs)
        except TimeoutError, e:
            if expecting_time_out:
                print "Timeout generated OK"
            else:
                raise RuntimeError("Wasn't expecting TimeoutError Here")
        else:
            if expecting_time_out:
                raise RuntimeError("Was expecting TimeoutError Here")
            else:
                print "No TimeoutError generated OK"

        elapsed = time.time() - start
        print "That took",elapsed,"seconds for timeout of",t_limit

    def test():
        """Test code"""

        # no nesting
        _test_time_limit("simple #1", True, 5, _spin, 10)
        _test_time_limit("simple #2", False, 10, _spin, 5)

        # 1 level of nesting
        _test_time_limit("nested #1",  True, 4, _test_time_limit,
                         "nested #1a", True, 5, _spin, 10)
        _test_time_limit("nested #2",  False, 6, _test_time_limit,
                         "nested #2a", True, 5, _spin, 10)
        _test_time_limit("nested #4",  False, 6, _test_time_limit,
                         "nested #4a", False, 10, _spin, 5)

        # 2 level of nesting
        _test_time_limit("nested #5",  True, 3, _test_time_limit,
                         "nested #5a", True, 4, _test_time_limit,
                         "nested #5b", True, 5, _spin, 10)
        _test_time_limit("nested #9",  False, 7, _test_time_limit,
                         "nested #9a", True, 4, _test_time_limit,
                         "nested #9b", True, 5, _spin, 10)
        _test_time_limit("nested #10", False, 7, _test_time_limit,
                         "nested #10a",False, 6, _test_time_limit,
                         "nested #10b",True, 5, _spin, 10)
        _test_time_limit("nested #12", False, 7, _test_time_limit,
                         "nested #12a",False, 6, _test_time_limit,
                         "nested #12b",False, 10, _spin, 5)

        print "All tests OK"

    test()


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mccredie at gmail.com  Fri Mar 16 16:30:19 2007
From: mccredie at gmail.com (Matimus)
Date: 16 Mar 2007 13:30:19 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <1174069208.088356.289020@d57g2000hsg.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<1174069208.088356.289020@d57g2000hsg.googlegroups.com>
Message-ID: <1174077019.462758.289340@d57g2000hsg.googlegroups.com>

On Mar 16, 11:20 am, "Matimus" <mccre... at gmail.com> wrote:
> You might look at the bisect module (part of the standard
> distribution).

Here is an example:

>>> from bisect import insort
>>> x = [0,100,200,1000]
>>> insort(x,10)
>>> x
[0, 10, 100, 200, 1000]



From fleitner at REMcnioOVE.es  Wed Mar 28 20:25:29 2007
From: fleitner at REMcnioOVE.es (Florian Leitner)
Date: Thu, 29 Mar 2007 02:25:29 +0200
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
Message-ID: <euf11o$rk6$1@aioe.org>

* s99999999s2003 at yahoo.com wrote, On 3/29/07 2:09 AM:
>   hi
> which is the best methods to use for list copying. using list() , [:]
> or create list through list comprehension. what are the differences
> between these ?
> thanks
> 

depends on what you intend to do:

-create a new object:
use a list comprehension or list()

-make a shallow copy:
use copy.copy() or the slicing operator ([:])

-make a deep copy (incl. each list element):
use copy.deepcopy()

Try experimenting around, deleting and adding elements or changing them 
in the copy of your list and the original and see what happens if you 
are not sure what these things do. (to use copy, import it first)

flo


From eurleif at ecritters.biz  Thu Mar 29 10:09:29 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 29 Mar 2007 10:09:29 -0400
Subject: YouTube showing repr() of a tuple
In-Reply-To: <460b9f48$0$30100$4d3efbfe@news.sover.net>
References: <460b9f48$0$30100$4d3efbfe@news.sover.net>
Message-ID: <460bc895$0$30091$4d3efbfe@news.sover.net>

Leif K-Brooks wrote:
> Thought this might amuse some of you:
> 
> <http://youtube.com/results?search_query=korect+my+speling>

Better example:

<http://youtube.com/results?search_query=korect+my+speling%C2%A1>


From steve at REMOVEME.cybersource.com.au  Thu Mar  8 03:20:23 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 08 Mar 2007 19:20:23 +1100
Subject: Is numeric keys of Python's dictionary automatically sorted?
References: <esn6nu$c8nt$1@netnews.upenn.edu>
	<1173300100.810023.223130@t69g2000cwt.googlegroups.com>
	<esn8ir$c8p4$1@netnews.upenn.edu>
	<1173339260.576508.157010@c51g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.08.08.20.22.586466@REMOVEME.cybersource.com.au>

On Wed, 07 Mar 2007 23:34:20 -0800, Nick Vatamaniuc wrote:



>> >>From the standard library docs:
>>
>> > "Keys and values are listed in an arbitrary order which is non-random,
>> > varies across Python implementations, and depends on the dictionary's
>> > history of insertions and deletions."
>>
>> > i.e. the behaviour you have discovered is an implementation detail,
>> > and could change in future versions.
> 
> I would consider that a bad choice. In the dictionary the keys are a
> set i.e. you might as well get a set() when you do d.keys() but the
> set() came later so you just get a list. 

The internal implementation of dictionaries are irrelevant.

Whether the keys "inside" a dictionary are "a set of keys" or "a list of
keys" or "a bunch of keys" is just semantics. 


> The problem with a list is
> that somehow people want to make sense of it's order, just like in
> this case. 

And the problem with a dictionary is that some people want to make sense
of its order, just like in this case, and the fifty thousand previous
times people have asked this newsgroup how they can sort a dictionary.



> So if instead of asking, he could have just written the
> application based on the fact that the keys will always be sorted in
> some way. But then one day his application maybe run a different
> platform and all of the sudden the keys are not sorted as before and
> then disaster strikes.

That would be his problem for being a bad coder, not our problem or the
language's fault.

There is no limit to the "could haves" that lead to disaster. Somebody
"could have" assumed that list.sort() returns the sorted list. Somebody
"could have" assumed that "is" is merely a synonym for "==".

And you know something? We get people making those mistakes all the time.
When people make those mistakes, it is *their responsibility*, for being
stupid or not reading the docs or not doing sufficient testing, or simply
for being inexperienced.


> I hope that dictionary.keys() would return a set to emphasize that
> keys are unordered.

What makes you think that people will magically intuit that sets are
unordered when they insist on thinking that dicts are ordered?

The below-average coder does this:

>>> D = {1: None, 2: None, 3:None}
>>> D
{1: None, 2: None, 3: None}

and concludes that dictionaries are ordered. If they are better-than
average, they might try this:

>>> D = {1: None, 4: None, 3:None} # keys out of order
>>> D
{1: None, 3: None, 4: None}

Still ordered, right? It's actually quite hard to get a dict with purely
integer keys out of order. So they ASS_U_ME that dicts are ordered.

What makes you think they won't do the same with sets?

>>> set((1, 2, 3))
set([1, 2, 3])
>>> set((1, 4, 3))
set([1, 3, 4])
>>> D = {4: None, 2: None, 1: None, 3: None}
>>> set(D.keys())
set([1, 2, 3, 4])

Sure looks ordered to me.

The solution is:

(1) Don't assume unordered data structures like sets and dicts are
ordered, even if they look like it. They aren't.

(2) If you want the keys of a dict sorted, get the keys, and sort them
when and as you need them.

(3) If you think you want a sorted dictionary, chances are you actually
want a different algorithm.

(4) But if you really do need a sorted dictionary, there are recipes on
the web. Google is your friend. But remember, they will be slower than
regular dictionaries.


-- 
Steven D'Aprano 



From steve at holdenweb.com  Fri Mar 23 14:25:34 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 23 Mar 2007 14:25:34 -0400
Subject: Multi-line strings with formatting
In-Reply-To: <1174669850.3450.40.camel@dot.uniqsys.com>
References: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>
	<1174669850.3450.40.camel@dot.uniqsys.com>
Message-ID: <eu165f$qm2$1@sea.gmane.org>

Carsten Haese wrote:
> On Fri, 2007-03-23 at 09:54 -0700, gburdell1 at gmail.com wrote:
>> When constructing a particularly long and complicated command to be
>> sent to the shell, I usually do something like this, to make the
>> command as easy as possible to follow:
>>
>> commands.getoutput(
>>     'mycommand -S %d -T %d ' % (s_switch, t_switch)   +
>>     '-f1 %s -f2 %s '         % (filename1, filename2) +
>>     '> %s'                   % (log_filename)
>>     )
>>
>> Can anyone suggest a better way to construct the command, especially
>> without the "+" sign at the end of each line (except the last) ? If I
>> take out the "+", then I need to move all the variables to the end, as
>> so:
>>
>> commands.getoutput(
>>     'mycommand -S %d -T %d '
>>     '-f1 %s -f2 %s '
>>     '> %s'
>>     % (s_switch, t_switch, filename1, filename2, log_filename)
>>     )
>>
>> or:
>>
>> commands.getoutput(
>>     '''mycommand -S %d -T %d \
>>     -f1 %s -f2 %s \
>>     > %s'''
>>     % (s_switch, t_switch, filename1, filename2, log_filename)
>>     )
> 
> You get the best of both worlds, i.e. one big multiline string with
> in-line parameters, by using a mapping:
> 
> commands.getoutput(
>    '''mycommand -S %(s_switch)d -T %(t_switch)d \
>     -f1 %(filename1)s -f2 %(filename2)s \
>     > %(log_filename)s'''
>     % locals() )
> 
> Of course I'm assuming that s_switch etc. are local variables. If
> they're not, well, they ought to be.
> 
> -Carsten
> 
> 
If that doesn't suit then build a list:

l = [
     'mycommand -S %d -T %d ' % (s_switch, t_switch)   ,
     '-f1 %s -f2 %s '         % (filename1, filename2) ,
     '> %s'                   % (log_filename)
]

and then return commands.getoutput("".join(l)).

regards
  Steve

-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From steve at REMOVEME.cybersource.com.au  Thu Mar  1 23:47:38 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 02 Mar 2007 15:47:38 +1100
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<7xabywnugu.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>

On Thu, 01 Mar 2007 20:24:33 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
>> But if you used Apps Hungarian, and saw this line of code:
>> 
>> if hmmCurrentHeight <= hinCriticalHeight:
>> 
>> then you should instantly recognise that there's a problem. Comparing
>> a height in millimetres to a height in inches is not a good thing to do,
>> no matter that they're both floats.
> 
> That still sounds like an unreliable manual type system, 

It's unreliable in the sense that the coder has to follow the naming
convention, and must have some bare minimum of sense. If your coders are
morons, no naming convention will save you. (For that matter, nothing will
save you.)


> instead of an
> automatic type system that includes dimension analysis.  You might
> like this:
> 
>     http://futureboy.homeip.net/frinkdocs/
> 
> There are many Python implementations of dimensioned units as well.  I
> posted one here a few weeks ago.

Sure, and I love the Unix utility "units", and my HP calculator.
Dimensioned units are useful.

But dimensioned units are still only part of the story. Joel describes the
situation the early Word developers found: when you're writing a word
processor, you are doing a LOT of conversions between screen coordinates
and window pane coordinates. Both have the same type (a pair of ints),
both have the same dimensional units (length/pixels) but they are
semantically different. If you place the character "N" at coordinates 0,0,
it makes a big difference if the coordinates are relative to the current
window or relative to the screen.

Apps Hungarian is a heuristic for dealing with semantic differences, not
data types. It deals with more than just dimensional analysis.



-- 
Steven D'Aprano 



From MonkeeSage at gmail.com  Sat Mar  3 17:28:03 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 14:28:03 -0800
Subject: class attrdict
In-Reply-To: <1huecz7.1thcn0b1j64biiN%aleax@mac.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
	<45e9b753$0$8983$4c368faf@roadrunner.com>
	<1huecz7.1thcn0b1j64biiN%aleax@mac.com>
Message-ID: <1172960883.340892.183850@31g2000cwt.googlegroups.com>

On Mar 3, 1:29 pm, a... at mac.com (Alex Martelli) wrote:
> It would be nice, yes, weren't it for the inevitable irregularity, one
> way or another, caused by the clash between attributes and items.

In thinking about it, I think this might fall under 'we're all
consenting adults here'. I mean, you can shadow the dict constructor
from the toplevel if you're so inclined (or don't know any better).
But you could make it harder to accidentally shadow builtin
attributes:

from warnings import warn
class attrdict(dict):
    __builtins__ = dir(dict)
    def __init__(self, *args, **kwargs):
        dict.__init__(self, *args, **kwargs)
        for k, v in self.items():
            dict.__setattr__(self, str(k), v)
    def __setitem__(self, k, v):
        if k in self.__builtins__:
            warn('shadowing builtin attribute: %s' % k,
RuntimeWarning, 2)
        dict.__setitem__(self, k, v)
        dict.__setattr__(self, str(k), v)
    __setattr__ = __setitem__

a = attrdict([(1,2)], a=3, b=4)
a.update = 'test'

Regards,
Jordan



From sjmachin at lexicon.net  Fri Mar  2 22:57:03 2007
From: sjmachin at lexicon.net (John Machin)
Date: 2 Mar 2007 19:57:03 -0800
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <45e8c931$0$8646$426a34cc@news.free.fr>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45e8c931$0$8646$426a34cc@news.free.fr>
Message-ID: <1172894223.669617.79060@31g2000cwt.googlegroups.com>

On Mar 3, 12:36 pm, Bruno Desthuilliers >
[snip]
>      DATE = 5
>      TARGET = 6
[snip]
> Now for the bad news: I'm afraid your algorithm is broken : here are my
> test data and results:
>
> input = [
>      #ID  STATE ...  ...  ... TARG DATE
>      "aaa\tAAA\t...\t...\t...\tBBB\t20071212\n",
[snip]

Bruno, The worse news is that your test data is broken. According to
the OP (and your own code (DATE = 5 etc)), the target state comes
last. GIGO. At least you have demonstrated to the OP why naming the
field indexes is a good idea :-)
Cheers,
John



From jrpfinch at gmail.com  Mon Mar 26 06:29:32 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 26 Mar 2007 03:29:32 -0700
Subject: Calling Queue experts
In-Reply-To: <1174899202.355092.209590@l75g2000hse.googlegroups.com>
References: <1174899202.355092.209590@l75g2000hse.googlegroups.com>
Message-ID: <1174904972.597317.27240@e65g2000hsc.googlegroups.com>

Got it.  New PickleQueue class should be as follows:

import Queue
import cPickle

class PickleQueue(Queue.Queue):
    """A multi-producer, multi-consumer, persistent queue."""


    def __init__(self, filename, maxsize=0):
        """Initialize a persistent queue with a filename and maximum
size.


        The filename is used as a persistent data store for the
queue.
        If maxsize <= 0, the queue size is infinite.
        """
        self.filename = filename
        Queue.Queue.__init__(self, maxsize)
        print self.queue

    def _init(self, maxsize):
        # Implements Queue protocol _init for persistent queue.
        # Sets up the pickle files.
        self.maxsize = maxsize
        try:
            self.readfile = file(self.filename, 'r')
            self.queue = cPickle.load(self.readfile)
            self.readfile.close()
        except IOError, err:
            if err.errno == 2:
                # File doesn't exist, continue ...
                self.queue = Queue.deque()
            else:
                # Some other I/O problem, reraise error
                raise err
        except EOFError:
            # File was null?  Continue ...
            self.queue = Queue.deque()


        # Rewrite file, so it's created if it doesn't exist,
        # and raises an exception now if we aren't allowed
        self.writefile = file(self.filename, 'w')
        cPickle.dump(self.queue, self.writefile, 1)


    def __sync(self):
        # Writes the queue to the pickle file.
        self.writefile.seek(0)
        cPickle.dump(self.queue, self.writefile, 1)
        self.writefile.flush()


    def _put(self, item):
        # Implements Queue protocol _put for persistent queue.
        self.queue.append(item)
        self.__sync()


    def _get(self):
        # Implements Queue protocol _get for persistent queue.
        item = self.queue.popleft()
        self.__sync()
        return item



From nobody at invalid.com  Thu Mar 22 17:50:59 2007
From: nobody at invalid.com (Erik Johnson)
Date: Thu, 22 Mar 2007 15:50:59 -0600
Subject: Been a while...
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<mailman.5466.1174580521.32031.python-list@python.org>
Message-ID: <4602fa3c$1@nntp.zianet.com>


"Michael Bentley" <michael at jedimindworks.com> wrote in message
news:mailman.5466.1174580521.32031.python-list at python.org...
>
> On Mar 22, 2007, at 10:34 AM, John Salerno wrote:
>
> > Hi guys. It's been a while since I've used Python, so I got a little
> > rusty, but I really want to start using it again, just out of habit
> > and
> > for fun. Can anyone suggest a book or a website with little projects I
> > could work on to keep me busy?
>
> http://www.pythonchallenge.com

    There is also a slew of interesting (and challenging) problems at SPOJ
(Sphere Online Judge: https://www.spoj.pl/) which you can solve and submit
your Python (or one of about 30 other languages) solution to for automatic
and (almost) immediate judging.

    There is a slew of programming contest problems at
http://acm.uva.es/problemset/ , an ACM-sponsored site which does not accept
postings in Python, but you can always dig through the problems to find an
interesting one to work on.  You'll have to decide for yourself if you've
solved it correctly / satisfactorily.

Good luck,
-ej




From steve at holdenweb.com  Mon Mar 19 13:57:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 13:57:15 -0400
Subject: PythonCard thoughts
In-Reply-To: <1174315460.650400.202270@e1g2000hsg.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>	<45fe9b31$0$17946$c3e8da3@news.astraweb.com>
	<1174315460.650400.202270@e1g2000hsg.googlegroups.com>
Message-ID: <etmj0e$29m$1@sea.gmane.org>

king kikapu wrote:
>> I don't know much about PythonCard or wxGlade, but I use wxPython (which
>> wxGlade uses, right?) and you now have the option to separate your GUI
>> and code using an XRC file (xml file that describes layout). So perhaps
>> this is something you can do with wxGlade, but at the same time it might
>> still create the problem you describe above. However, it's very to have
>> your Python files contain just logic.
> 
> Yes, both products (PythonCard and wxGlade) uses wxPython. It's just
> that PythonCard is sitting on top of wxPython and it intercepts the
> events generated. Then it search for an appropriate declared function
> on your code and call it (all this happens at runtime).
> It shield us from much of the boilerplate code that gui toolkits
> require and in the case that you need to address directly wxPython,
> you just can!
> 
> I discovered that when you run your designed GUI from PythonCard's
> layoutEditor, you have the ability to define a command line option
> that is called
> "Message Watcher". This, will show you the names of the actual events
> that you have to write code for, so you, at least for this, do not
> have
> to dig the docs for their names. Pretty good!
> 
The only real problem is that PythonCard appears to have run out of 
development steam. I don't think there's been much^H^H^H^H any work on 
it in the past year or two. This is a shame, as it showed considerable 
promise.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From luismgz at gmail.com  Mon Mar 19 21:53:57 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 19 Mar 2007 18:53:57 -0700
Subject: Passing arguments to a command line from a python script
In-Reply-To: <1174355342.669635.302960@y80g2000hsf.googlegroups.com>
References: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>
	<mailman.5313.1174350370.32031.python-list@python.org>
	<1174354958.815878.95020@d57g2000hsg.googlegroups.com>
	<1174355342.669635.302960@y80g2000hsf.googlegroups.com>
Message-ID: <1174355637.450275.148340@l77g2000hsb.googlegroups.com>

On Mar 19, 10:49 pm, "zacherates" <zachera... at gmail.com> wrote:
> On Mar 19, 9:42 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
>
>
>
> > On Mar 19, 9:25 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
>
> > > En Mon, 19 Mar 2007 20:46:56 -0300, Luis M. Gonz?lez <luis... at gmail.com>
> > > escribi?:
>
> > > > What I want now is execute the script I just created.
> > > > As far as I know, the only way to execute the script is from a command
> > > > line and typing "setup.py py2exe".
>
> > > A few ways:
> > > - os.system("commandline"). Simplest way, but you don't have much control,
> > > and it blocks until the process finishes.
> > > - os.popen[234]? or the functions in the popen2 module
> > > - the subprocess module - the most complete way, but simple enough for
> > > most cases.
>
> > > --
> > > Gabriel Genellina
>
> > I'm sorry, but still I can't figure out this...
> > Would you please show me a sample usage of os.system or os.popen for
> > passing arguments to the command line?
> > In this case, I should pass to the command line "setuppy py2exe".
>
> > Thanks!
> > Luis
>
> aaron at athena:~$ python
> Python 2.4.4c1 (#2, Oct 11 2006, 21:51:02)
> [GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu5)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.>>> import os
> >>> rt = os.system("ls")
>
> apps       Firefox_wallpaper.png  s2        tux_sshot_0.ppm
> xorg.conf.diff
> Desktop    media                  s3        work
> downloads  permutation.py         squeak    workspace
> Examples   permutation.pyc        trackers  xorg.conf.aiglx
>
> >>> rt
> 0
>
> This implies that `os.system("setuppy py2exe")` should do what you
> want.



It works!
Thank you, this is just what I wanted.

Luis



From andre.roberge at gmail.com  Sat Mar 10 13:24:10 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 10 Mar 2007 10:24:10 -0800
Subject: A Pythonic Way to Measure and Improve Your Programming Skills?
In-Reply-To: <mailman.4915.1173549249.32031.python-list@python.org>
References: <45F14D7E.3060707@taupro.com>
	<a06230908c2187f182731@[192.168.1.242]>
	<1173546636.14230.57.camel@workshop>
	<mailman.4915.1173549249.32031.python-list@python.org>
Message-ID: <1173551049.951482.93620@c51g2000cwc.googlegroups.com>

On Mar 10, 1:54 pm, Brad Allen <b... at allendev.com> wrote:
> At 9:10 AM -0800 3/10/07, Michael Bernstein wrote:
>
> >On Sat, 2007-03-10 at 10:01 -0600, Brad Allen wrote:
>
> >>  When I discussed this problem with Michael Bernstein at PyCon he suggested
> >>  the idea of creating a "chroot jail" for each web session which could run
> >>  the Python interpreter in a secure sandbox. That might be easier than giving
> >>  each session a whole virtual server.
>
> >Note that this wasn't an original idea of mine, I got it from brief
> >mentions associated with two existing interactive python-in-a-web-page
> >implementations:
>
> >         Try Python:http://www.mired.org/home/mwm/try_python/
>
> >         TryPy:http://trac.pocoo.org/wiki/TryPy
>
> Cool! The first link appears to work with Firefox and provides a real example
> of using a Python interactive prompt via a non-local web interface.
> Interestingly, it doesn't seem to use Crunchy, but instead uses TryPy.

try_python was one of the things that inspired me to write Crunchy.


> Apparently you can't define classes or functions with TryPy, but I recall you
> can using Crunchy. This is important for creating tutorials in which you
> ask the student to define a class or function to solve a problem.

Yes, Crunchy gives you full access to a regular Python interpreter.
In a classroom environment, you can even write some doctests that have
to be satisfied by the student's code.  One example included in the
documentation requires the user to define a class to solve a
particular problem.

I think that it would be great indeed if Crunchy could be made
available from the web in a secure way.  Hopefully, by the time we
make the 1.0 release, Crunchy will have been found to be useful enough
that someone with the appropriate resources will make this happen.

Andr?



From john.pye at gmail.com  Wed Mar 21 00:58:05 2007
From: john.pye at gmail.com (John Pye)
Date: 20 Mar 2007 21:58:05 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5372.1174450550.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
Message-ID: <1174453085.748142.48700@y80g2000hsf.googlegroups.com>

On Mar 21, 3:15 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Wed, 21 Mar 2007 00:46:03 -0300, John Pye
> <john.... at student.unsw.edu.au> escribi?:
>
> > This is not an option for me, as I want to pass the
> > FILE* from Python and all the way into into a existing shared-library
> > code. I can't change the latter; it must work ok with standard fprintf
> > (etc) functions.
>
> You can get the file descriptor from the Python file object using its
> fileno() method. The file descriptor lives at the OS level, so it's safe
> to pass around. You can regenerate a new FILE struct (using the other
> runtime library) with fdopen.
>
> --
> Gabriel Genellina

Hmm. Reading this again I think I understand properly now. The
'fileno' is really *not* the same thing as the FILE* pointer cast to
an integer. It is a lower-level structure.

The question is now, if I don't want to modify my *python* code, how
do I get at the 'fileno' property of my PyFileObject?

Also, are there consequences for using this approach of regenerating
the FILE struct? For example if I have the following:

F = os.tmpfile()
F.write("some data")
F.seek(0)
myswigmodule.dosomething(F)
F.seek(0)
S = F.read()
print S

I don't know enough about this low-level file handling to really
understand the implications of what you are proposing -- perhaps you
could explain a little?

Cheers
JP



From steve at holdenweb.com  Wed Mar 14 16:54:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 16:54:15 -0400
Subject: string formatting: engineering notation
In-Reply-To: <et9l3u$e57$1@ruby.cit.cornell.edu>
References: <et9l3u$e57$1@ruby.cit.cornell.edu>
Message-ID: <et9nge$5s3$2@sea.gmane.org>

Darren Dale wrote:
> Does anyone know if it is possible to represent a number as a string with
> engineering notation (like scientific notation, but with 10 raised to
> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
> decimal.Decimal class, but repeatedly instantiating Decimals is inefficient
> for my application (matplotlib plotting library). If it is not currently
> possible, do you think the python devs would be receptive to including
> support for engineering notation in future releases?
> 
How close is this:

  >>> "%.3e" % 3.14159
'3.142e+00'

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From nick at craig-wood.com  Mon Mar 26 05:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 26 Mar 2007 04:30:08 -0500
Subject: detect suprocess interaction 
References: <mailman.5521.1174670106.32031.python-list@python.org>
Message-ID: <slrnf0f2mf.7t3.nick@irishsea.home.craig-wood.com>

Robin Becker <robin at reportlab.com> wrote:
>  I'm using subprocess to carry out svn commands (probably should use the svn api 
>  package, but that's a dependency too far). Anyhow my code looks like
> 
>  from subprocess import Popen, PIPE
>  p = Popen((svn,'ls',u),stdout=PIPE,stderr=PIPE)
>  i = p.wait()
> 
>  and this sort of thing works well under most circumstances. However, when this 
>  code is executed for the very first time by a particular user it hangs waiting 
>  on user input.
> 
>  This code is being used purely for testing correctness of a particular svn url 
>  so in the normal case we want to throw away both stdout and stderr. In the 
>  exceptional case is it possible to detect that input is required and only in 
>  that case issue the current contents of stdout (presumably a request for a 
>  password)?
> 
>  Clearly I need to supply some kind of input filelike object, but is this sort of 
>  thing possible.

Yes it is possible, but if you try it you'll find you'll need to
implement the fileno() method of file objects which is asked to return
an OS file handle.  This is obviously a problem!

In general subprocess isn't really designed for interactive
processes like the above.  You'll find it much easier to use pexpect
for interactive stuff.

Note that svn has its own devious ways of finding a terminal to ask
the user for the password, eg...

$ svn ls svn+ssh://user at 127.0.0.1/svn </dev/null >/dev/null 2>&1
Password: 

I don't know exactly how it does that but I suspect it is to do with
the controlling terminal...

On my system

$ setsid svn ls svn+ssh://user at 127.0.0.1/svn </dev/null >/dev/null 2>&1

Pops up a gui box asking for the password!

You can simulate the above with

  Popen(..., stdin=file(os.devnull,"r"), preexec_fn=os.setsid)

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From sjmachin at lexicon.net  Mon Mar  5 07:01:31 2007
From: sjmachin at lexicon.net (John Machin)
Date: 5 Mar 2007 04:01:31 -0800
Subject: list-like behaviour of etree.Element
In-Reply-To: <mailman.4668.1173085252.32031.python-list@python.org>
References: <mailman.4658.1173041314.32031.python-list@python.org>
	<1173080656.077853.249520@8g2000cwh.googlegroups.com>
	<mailman.4668.1173085252.32031.python-list@python.org>
Message-ID: <1173096091.815555.28420@30g2000cwc.googlegroups.com>

On Mar 5, 8:00 pm, "Fredrik Lundh" <fred... at pythonware.com> wrote:

>
> extend() will be in the next release:
>
>    http://effbot.org/zone/elementtree-changes-13.htm
>

Hi Fredrik,
"The library requires Python 2.2 or newer." -- Does this apply to
cElementTree as well?

Reason for asking: my xlrd package works with Python 2.1 or later. I'm
using cElementTree in a so-far-so-good prototype of parsing Excel
2007 .XLSX files ...

Regards,
John
Regards,
John



From DustanGroups at gmail.com  Sun Mar 18 09:29:00 2007
From: DustanGroups at gmail.com (Dustan)
Date: 18 Mar 2007 06:29:00 -0700
Subject: Private data
In-Reply-To: <1174224087.024303.102130@n59g2000hsh.googlegroups.com>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.12.06.32.760433@REMOVE.THIS.cybersource.com.au>
	<1174220701.206419.77780@e65g2000hsc.googlegroups.com>
	<1174224087.024303.102130@n59g2000hsh.googlegroups.com>
Message-ID: <1174224540.496180.11440@l75g2000hse.googlegroups.com>

On Mar 18, 8:21 am, "Dustan" <DustanGro... at gmail.com> wrote:
> On Mar 18, 7:25 am, "Dustan" <DustanGro... at gmail.com> wrote:
>
>
>
> > On Mar 18, 7:06 am, Steven D'Aprano
> > > First, an example of the code in action.
>
> > > >>> import PrivateAttributes
> > > >>> obj = PrivateAttributes.TestPrivateClassAttributes()
> > > >>> obj.getNumInstances()
> > > 1
> > > >>> another = PrivateAttributes.TestPrivateClassAttributes()
> > > >>> obj.getNumInstances()
> > > 2
> > > >>> athird = PrivateAttributes.TestPrivateClassAttributes()
> > > >>> athird.getNumInstances()
>
> > > 3
>
> > > The getNumInstances method reports the number of instances of the
> > > PrivateAttributes class. There's no obvious class attribute where this
> > > count is being kept:
>
> > > >>> obj.__class__.__dict__.keys()
>
> > > ['__module__', 'getNumInstances', '__dict__', '__weakref__', '__doc__',
> > > '__init__']
>
> > > Here's how to hack it, and make it report wrong numbers.
>
> > > >>> c = obj.getNumInstances.func_closure
> > > >>> c[1].cell_contents.numInstances = -300
>
> > > >>> athird.getNumInstances()
> > > -300
> > > >>> afourth = PrivateAttributes.TestPrivateClassAttributes()
> > > >>> athird.getNumInstances()
>
> > > -299
>
> > > So yes, it is absolutely hackable.
>
> > I did have a feeling that it was hackable, but had no idea how one
> > could possibly go about hacking it (I was starting to wonder of there
> > was a way to apply locals() and globals() on functions). But now I
> > (ehem) sorta know how it's done.
>
> > > Now, I'm hardly a Python guru, but in about fifteen minutes I followed the
> > > trail through the object chain, and found how to hack this. An real guru
> > > would probably do it in three minutes.
>
> > > I was helped a bit by having the source code. But even without the source
> > > code, I reckon I could have done it in an hour or so, if I was motivated
> > > enough. All the tools you need are a Python interactive session, the dir()
> > > function and the dis module.
>
> > I have used all of those before, but I haven't been able to fully
> > understand the output of the dis module; maybe that's my problem.
>
> Alright, perhaps you can help me out with this learning curve here. I
> have seen, but not worked with, some basic assembly code, so I think I
> have a vague idea of what it all means, although I have a feeling it's
> not all valid assembly (on any widely used machine).
>
> First I dis.dis'd testPrivateStaticFunctionVariables:
>
> >>> dis.dis(testPrivateStaticFunctionVariables)
>
>  21           0 LOAD_DEREF               0 (func)
>               3 LOAD_DEREF               1 (internalData)
>               6 LOAD_FAST                0 (args)
>               9 CALL_FUNCTION_VAR        1
>              12 RETURN_VALUE
>
> At first I was a little confused by this, because there's no increment
> in sight, but then I realized it was dis.dis'ing the wrapper closure
> in the internalDataDecorator closure in the PrivateDataEngine function
> (and then I hit myself on the head and cried out "doh!"). So that
> 'code' is coming from this (taken out of closure):
>
> def wrapper(*args):
>     return func(internalData, *args)
>
> So, based on what you showed me, I found my way after some failed
> tries to this:
>
> >>> dis.dis(testPrivateStaticFunctionVariables.func_closure[0].cell_contents)
>
>  28           0 LOAD_FAST                0 (internalData)
>               3 DUP_TOP
>               4 LOAD_ATTR                0 (numCalls)
>               7 LOAD_CONST               1 (1)
>              10 INPLACE_ADD
>              11 ROT_TWO
>              12 STORE_ATTR               0 (numCalls)
>
>  29          15 LOAD_FAST                0 (internalData)
>              18 LOAD_ATTR                0 (numCalls)
>              21 RETURN_VALUE
>
> That's coming from this:
>
> @PrivateDataEngine(numCalls = 0)
> def testPrivateStaticFunctionVariables(internalData):
>     """returns the number of times this function has been called."""
>     internalData.numCalls += 1
>     return internalData.numCalls
>
> Here's a few questions on this output, for which I would highly
> appreciate some answers:
>
> What's the difference between 'LOAD_DEREF', 'LOAD_FAST', and
> 'LOAD_CONST', and, as seen athttp://docs.python.org/lib/module-dis.html,
> 'LOAD_GLOBAL'? I can imagine that 'LOAD_GLOBAL' loads a global, but
> seeing as python is such a dynamic language, how exactly is it
> supposed to distinguish between them?
>
> I don't understand the following at all: 'DUP_TOP', 'ROT_TWO'. Any
> pointers?
>
> What does 'INPLACE_ADD' mean, if not in place addition, and if it is
> in place addition, why does it need to 'STORE_ATTR' afterward?
>
> Thanks for any help!

If this had been on any other usenet group, someone would have RTFM'd
me to hell.
http://docs.python.org/lib/bytecodes.html
I might still have some more questions later, but for now, I'll look
at this.

> > > --
> > > Steven




From nagle at animats.com  Sat Mar 10 19:29:46 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 11 Mar 2007 00:29:46 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <87tzwszmdc.fsf@pobox.com>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
	<IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
	<87tzwszmdc.fsf@pobox.com>
Message-ID: <_3IIh.9178$jx3.4584@newssvr25.news.prodigy.net>

John J. Lee wrote:
> John Nagle <nagle at animats.com> writes:
> 
> 
>>skip at pobox.com wrote:
> Traditionally, in the open source world, one does something about it,
> or shuts up after having made one's point, say, ten or twenty times

     In retail, there's an assumption that for every customer who complains
about a real problem, about a hundred customers noticed it and didn't complain,
and about twenty of them will never come back.

     There's a great little book, "A Complaint is a Gift", about this.

					John Nagle


From erwan.adam at cea.fr  Fri Mar  9 05:41:45 2007
From: erwan.adam at cea.fr (Erwan Adam)
Date: Fri, 09 Mar 2007 11:41:45 +0100
Subject: Pb with descriptor and super ...
In-Reply-To: <esr95l$n12$1@ellebore.extra.cea.fr>
References: <esr95l$n12$1@ellebore.extra.cea.fr>
Message-ID: <esrdl9$oe4$1@ellebore.extra.cea.fr>

Erwan Adam a ?crit :
> Hi all,
> 
> I have a problem with the use of descriptors
> and super. The file is :
> 
> # ---------------
> 
> class Desc(object):
>     def __init__(self, class_name):
>         self.class_name = class_name
>         return
>     def __get__(self, obj, typ):
>         print "Desc.__get__ : class_name is %s, obj is %s and typ is 
> %s"%(self.class_name, obj, typ)
>         return
>     pass
> 
> class A(object):
>     attr = Desc("A")
>     pass
> 
> class B(A):
>     attr = Desc("B")
>     pass
> 
> b = B()
> 
> print "-------"
> print "Getting b.attr ..."
> print "I hope that  : class_name is B, obj is b and typ is B"
> b.attr
> print "-------"
> print "Getting super(B, b).attr ..."
> print "I hope that  : class_name is A, obj is b and typ is A but it is 
> not the case !"
> super(B, b).attr
> print "-------"
> 
> # -----------
> 
> and the result is :
> 
> -------
> Getting b.attr ...
> I hope that  : class_name is B, obj is b and typ is B
> Desc.__get__ : class_name is B, obj is <__main__.B object at 0xb7b1f8ec> 
> and typ is <class '__main__.B'>
> -------
> Getting super(B, b).attr ...
> I hope that  : class_name is A, obj is b and typ is A but it is not the 
> case !
> Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7b1f8ec> 
> and typ is <class '__main__.B'>
> -------
> 
> I expected that when getting super(B, b).attr, typ is A, but it is not
> the case ...

Moreover, on the page :

http://users.rcn.com/python/download/Descriptor.htm

the author writes :

"The call super(B, obj).m() searches obj.__class__.__mro__ for the base 
class A immediately following B and then returns 
A.__dict__['m'].__get__(obj, A)."

which it seems not the case ...

Is it a bug or a mis-understood ?

Regards,

          E.A.


> 
> python used :
> 
> [adam at is111902 /home/adam/Work/Python]> python
> Python 2.4.3 (#2, Sep 18 2006, 21:07:35)
> [GCC 4.1.1 20060724 (prerelease) (4.1.1-3mdk)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>>
> 
> 
> Best regards,
> 
> 
>           E.A.


From dickinsm at gmail.com  Sun Mar 11 13:33:29 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 10:33:29 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <Xns98F0B0821C330duncanbooth@127.0.0.1>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<Xns98F0B0821C330duncanbooth@127.0.0.1>
Message-ID: <1173634409.663575.259600@30g2000cwc.googlegroups.com>

On Mar 11, 1:21 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> Tim Peters wrote inhttp://blog.gmane.org/gmane.comp.python.devel/day=20050409:
>
> > All Python behavior in the presence of a NaN, infinity, or signed zero
> > is a platform-dependent accident.  This is because C89 has no such
> > concepts, and Python is written to the C89 standard.  It's not easy to
> > fix across all platforms (because there is no portable way to do so in
> > standard C), although it may be reasonably easy to fix if all anyone
> > cares about is gcc and MSVC (every platform C compiler has its own set
> > of gimmicks for "dealing with" these things).

Understood. Platform dependent is fine.  But does this really excuse
results
like the following?

>>> from math import atan2
>>> x = -0.; print atan2(0., -1.)
-3.14159265359
>>> print atan2(0., -1.)
3.14159265359

Mark



From deets at nospam.web.de  Mon Mar  5 06:55:45 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 Mar 2007 12:55:45 +0100
Subject: Return type of operator on inherited class
References: <1173093988.715433.205730@t69g2000cwt.googlegroups.com>
Message-ID: <552eq1F217b9hU1@mid.uni-berlin.de>

looping wrote:

> Hi,
> my question is on this example:
> 
> class MyStr(str):
>     def hello(self):
>         print 'Hello !'
> 
> s1 = MyStr('My string')
> s2 = MyStr('My second string')
> 
> s1.hello()
> s2.hello()
> 
> s = s1 + s2
> 
> s.hello()
> 
>>>>
> Hello !
> Hello !
> Traceback (most recent call last):
>   File "<string>", line 204, in run_nodebug
>   File "<module1>", line 13, in <module>
> AttributeError: 'str' object has no attribute 'hello'
> 
> How could I get a type MyStr from the 'plus' (__add__) operation
> without overriding it in my class ?

You can't.
> I need to override *every* operator I like to use ?

Yes.

Diez


From kaushik.ghose at gmail.com  Fri Mar  9 20:30:09 2007
From: kaushik.ghose at gmail.com (kghose)
Date: 9 Mar 2007 17:30:09 -0800
Subject: Unexpected behavior of list of list
Message-ID: <1173490209.398081.200420@h3g2000cwc.googlegroups.com>

Hi,

The following code

listoflists = [[]]*2
listoflists[0].append(1)

appends(1) to both listoflists[0] and listoflists[1] (which I did not
expect)

while

listoflists = [[]]*2
listoflists[0] = [1]
listoflists[0].append(2)

works as expected.i.e. only listoflists[0] gets 2 appended to it and
any further operations work as expected.

I can't figure out why. Any help with explaining this would be much
appreciated

thanks!
-Kaushik



From carsten at uniqsys.com  Wed Mar  7 15:55:22 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 07 Mar 2007 15:55:22 -0500
Subject: Is numeric keys of Python's dictionary automatically sorted?
In-Reply-To: <esn6nu$c8nt$1@netnews.upenn.edu>
References: <esn6nu$c8nt$1@netnews.upenn.edu>
Message-ID: <1173300922.3461.74.camel@dot.uniqsys.com>

On Wed, 2007-03-07 at 15:18 -0500, John wrote:
> I am coding a radix sort in python and I think that Python's dictionary may 
> be a choice for bucket.
> 
> The only problem is that dictionary is a mapping without order. But I just 
> found that if the keys are numeric, the keys themselves are ordered in the 
> dictionary.

No.

The sequence of keys in a dictionary is a coincidental side effect of
the particular Python implementation, the number of keys, the values of
the keys, and the order in which the keys are inserted. You must not
rely on the keys appearing in any particular order.

Here is a simple counterexample that breaks the ordering, at least for
the version I'm running:

>>> d = {}
>>> for i in range(0,6): d[10**i] = []
... 
>>> d
{100000: [], 1: [], 100: [], 1000: [], 10: [], 10000: []}

-Carsten




From superprad at gmail.com  Wed Mar 21 15:10:58 2007
From: superprad at gmail.com (PKKR)
Date: 21 Mar 2007 12:10:58 -0700
Subject: parsing combination strings
In-Reply-To: <mailman.5415.1174503352.32031.python-list@python.org>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
	<mailman.5415.1174503352.32031.python-list@python.org>
Message-ID: <1174504258.691825.16380@e65g2000hsc.googlegroups.com>

ah ok, i guess something like this should do it for me then?

re.split('[^0-9]', str)[0]




From slm_guzel at hotmail.com  Sun Mar 25 14:06:57 2007
From: slm_guzel at hotmail.com (gslm)
Date: 25 Mar 2007 11:06:57 -0700
Subject: problem at installing phyton on windows
Message-ID: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>

Hi!
I'm too new on phyton.I have installed phyton.But when I write phyton
command, unfortunately, i can't run.I suppose that it is bacause of
setting path.But i can't solve.
Can you help?

Another thing is, when i double click the .py file, there are the
project form and the command line.How can i provide to view only the
project?
Thanks...



From alain.walter at thalesgroup.com  Thu Mar  8 06:22:00 2007
From: alain.walter at thalesgroup.com (awalter1)
Date: 8 Mar 2007 03:22:00 -0800
Subject: thread and portability Unix/Linux
In-Reply-To: <45ef0f17$0$16318$88260bb3@free.teranews.com>
References: <1173264866.645389.268640@v33g2000cwv.googlegroups.com>
	<45ef0f17$0$16318$88260bb3@free.teranews.com>
Message-ID: <1173352920.612543.88830@n33g2000cwc.googlegroups.com>

On 7 mar, 21:07, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> awalter1 wrote:
> > Hi,
> > I have a Python application that runs under HPUX 11.11 (then unix). It
> > uses threads :
> > from threading import Thread
> > # Class Main
> > class RunComponent(Thread):
>
> > My application should run under Linux (red hat 3 ou 4) and I read that
> > differences exist between the implementation of threads : on HPUX
> > 11.11 there is CMA (ou DCE) threads and on Linux POSIX thread. Do you
> > think that my Python application should be modified or may be such
> > differences are hidden by the python interpreter ?
> > In other terms, do I get some risks on this particular aspect by
> > porting my application ?
> > Thanks a lot
>
> > PS: If you are aware of other risk of porting, I am interested too.
>
> The Python threading model abstracts from the underlying OS threading, so
> there should be no need to change anything (AFAIK).
>
> j
>
> --
> Joshua Kugler
> Lead System Admin -- Senior Programmerhttp://www.eeinternet.com
> PGP Key:http://pgp.mit.edu/ ID 0xDB26D7CE
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com- Masquer le texte des messages pr?c?dents -
>
> - Afficher le texte des messages pr?c?dents -

Marvellous !
Thank you



From gnewsg at gmail.com  Wed Mar 21 05:18:20 2007
From: gnewsg at gmail.com (billiejoex)
Date: 21 Mar 2007 02:18:20 -0700
Subject: How many connections can accept a 'binded' socket?
In-Reply-To: <ecULh.10215$P47.6848@newssvr22.news.prodigy.net>
References: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>
	<ecULh.10215$P47.6848@newssvr22.news.prodigy.net>
Message-ID: <1174468700.689920.187610@y66g2000hsf.googlegroups.com>

On 20 Mar, 17:44, John Nagle <n... at animats.com> wrote:
> When you ask questions like this, please specify what
> operating system you're using.   Thanks.

That was a Linux Ubuntu 6.10. I submitted a bug report on sourceforge:
http://sourceforge.net/tracker/index.php?func=detail&aid=1685000&group_id=5470&atid=105470


Alex Martelli wrote:
> A shell command
> ulimit -Hn
> should report on the hard-limit of the number of open file descriptors;
> just ulimit -n should report on the current soft-limit.

Thank you, I'll try it.



From jstroud at mbi.ucla.edu  Fri Mar  2 21:20:06 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 02 Mar 2007 18:20:06 -0800
Subject: Newbie Test
In-Reply-To: <mailman.4617.1172882604.32031.python-list@python.org>
References: <mailman.4617.1172882604.32031.python-list@python.org>
Message-ID: <esam0m$lvc$1@daisy.noc.ucla.edu>

Nicholas Parsons wrote:
> Greetings,
> 
> This is just a test to see if I can post to this mailing list.  Can  
> someone from the list please respond to this email so I know it worked?
> 
> Thanks in advance!
> --Nick

Congratulations, you passed the newbie test!

James


From qilong_ren at yahoo.com  Fri Mar 16 16:39:48 2007
From: qilong_ren at yahoo.com (Qilong Ren)
Date: Fri, 16 Mar 2007 13:39:48 -0700 (PDT)
Subject: How to get the previous line in a file?
Message-ID: <882682.16208.qm@web58912.mail.re1.yahoo.com>

Hi,all

I am new to this list. And I am glade I am here.
I have a question. I need to do some text processing. I need to read from a file line by line. If some line is met with some condition, the previous line needs some modification. How to get the info of the previous line? 

Thanks!
Qilong




 
____________________________________________________________________________________
8:00? 8:25? 8:40? Find a flick in no time 
with the Yahoo! Search movie showtime shortcut.
http://tools.search.yahoo.com/shortcuts/#news
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From bj_666 at gmx.net  Sun Mar 18 04:24:48 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 18 Mar 2007 09:24:48 +0100
Subject: Webcams and python
References: <1174182674.500068.252550@p15g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.18.08.24.46.950750@gmx.net>

In <1174182674.500068.252550 at p15g2000hsd.googlegroups.com>, Synt4x wrote:

> from VideoCapture import Device
> cam = Device()
> 
> while 1:
>     img = cam.getImage()
> 
> Now, by doing this, my processor fires up to 100% load, which
> obviously makes my pc useless.
> 
> Is there any way or algorithm to lower the cpu load?

Just throw a small `time.sleep()` into the loop.

Ciao,
	Marc 'BlackJack' Rintsch


From riklaunim at gmail.com  Thu Mar 29 09:31:37 2007
From: riklaunim at gmail.com (riklaunim at gmail.com)
Date: 29 Mar 2007 06:31:37 -0700
Subject: gettext files manager
Message-ID: <1175175097.703995.135640@b75g2000hsg.googlegroups.com>

Does anyone know if Python gettext module or something else in Python
can "manage" po/mo files - list all strings from po/mo, show
untranslated, fuzzy strings ? I need something like that for a
"translations manager" :)



From sgeiger at ncee.net  Tue Mar 20 04:48:08 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 20 Mar 2007 03:48:08 -0500
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <569ih4F27o9bdU1@mid.uni-berlin.de>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>	<56863eF27p5bmU1@mid.uni-berlin.de>	<WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
	<569ih4F27o9bdU1@mid.uni-berlin.de>
Message-ID: <45FF9FC8.6060904@ncee.net>

Try installing it from source.  Perhaps getting a newer verion is all 
you would need.  If at that point you find there is a bug, report it.


Diez B. Roggisch wrote:
>>    What MDBtools did you install?  The RPM, a checkout from CVS,
>> or the downloadable distribution?  They're all different.
>>     
>
>
> The one that comes with ubuntu edgy. Just
>
>
> apt-get install mdbtools
>
> or something, that's it.
>
> I don't want to start a distro war here - but I always found the 
> RPM-based distros lacking, to say the least.
>
> Diez
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From sreisscruz at gmail.com  Wed Mar 14 12:22:02 2007
From: sreisscruz at gmail.com (Steve)
Date: 14 Mar 2007 09:22:02 -0700
Subject: Setting Up SOAPpy for Python v2.5 on Windows?
In-Reply-To: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
References: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
Message-ID: <1173889322.302145.71680@n59g2000hsh.googlegroups.com>

All,

Thanks for the suggestions!

I think that I will move forward with elementsoap instead of soappy...

Steve

On Mar 13, 11:53 am, "Steve" <sreissc... at gmail.com> wrote:
> Hi All,
>
> What are the required version of the SOAPpy, PyXML, fpconst that are
> needed to run under the Python 2.5 environment on Windows?
>
> Locations for the downloads?
>
> Thanks!
>
> Steve




From jackdied at jackdied.com  Fri Mar 23 18:04:59 2007
From: jackdied at jackdied.com (Jack Diederich)
Date: Fri, 23 Mar 2007 18:04:59 -0400
Subject: Python object overhead?
In-Reply-To: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
References: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
Message-ID: <20070323220459.GS13084@performancedrivers.com>

On Fri, Mar 23, 2007 at 03:11:35PM -0600, Matt Garman wrote:
> I'm trying to use Python to work with large pipe ('|') delimited data
> files.  The files range in size from 25 MB to 200 MB.
> 
> Since each line corresponds to a record, what I'm trying to do is
> create an object from each record.  However, it seems that doing this
> causes the memory overhead to go up two or three times.
> 
> See the two examples below: running each on the same input file
> results in 3x the memory usage for Example 2.  (Memory usage is
> checked using top.)
[snip]

When you are just appending all the lines in a big list your overhead
looks like:

records = []
for line in file_ob:
  records.append(line)

But when you wrap each line in a small class the overhead is

records = []
for line in file_ob:
  records.append(line) # the actual string
  records.append(object()) # allocation for the object instance
  records.append({}) # dictionary for per instance attributes

For small strings like dictionary words the overhead over the second
is about 5x the overhead of a plain list.  Most of it is the per
instance dictionary.

If you make the record a new style class (inherit from object) you can
specify the __slots__ attribute on the class.  This eliminates the per
instance dictionary overhead in exchange for less flexibility.

Another solution would be to only wrap the lines as they are accessed.
Make one class that holds a collection of raw records.  Have that return
a fancy class wrapping each record right before it is used and discarded.

class RecordCollection(object):
  def __init__(self, raw_records):
    self.raw_records = raw_records
  def __getitem__(self, i):
    return Record(self.raw_records[i])

If you are operating on each of the records in serial you only have
the class overhead for one at any given time.

Hope that helps,

-Jack


From steve at holdenweb.com  Sat Mar 17 06:29:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 17 Mar 2007 06:29:43 -0400
Subject: File extension
In-Reply-To: <cf14220703161559s1d106d03gd02bac4c0d695506@mail.gmail.com>
References: <cf14220703161559s1d106d03gd02bac4c0d695506@mail.gmail.com>
Message-ID: <45FBC317.2020204@holdenweb.com>

Anil Kumar wrote:
> Hi,
>  
> Can Python Script can have different extensions like .sh etc.... Or Is 
> .py is mandatory to be present as the extension for the Python Script.
>  
The interpreter itself doesn't really care. The issues you are hotting 
are due to operating system. and command shell differences.

> We have an application where the script was initially written in shell 
> script with extension .sh. Now we are migrating this script to be run in 
> both Unix and Windows, so using Python for migration.
>  
Good for you!

> I have created a new Python Script porting all the changes in shell 
> script and it is working fine in Unix/Linux operating system. Later I 
> changed the extension of the file from .py to .sh, even then it worked.
>  
The Unix command interpretation mechanism uses PATH as a list of 
directories to search for the named command file (the first word of the 
expanded command line). It then looks for the magic string "#!" at the 
start of the executable file and, if it finds that string, it passes the 
file to the interpreter named in the rest of the line for execution as a 
program.

Your Python files probably begin with something like

#!/usr/bin/python

or

#!/usr/bin/env python

> But when I try a python script with extension .sh in windows, the file 
> is not getting recognized by the Python interpreter. Is this supported? 
> Or is there any way we can achieve the same?
>  
In Windows, alas, the mechanism is less versatile. The command 
interpreter uses an environment variable called PATHEXT to decide which 
extensions to check when it sees a command that it can't find directly. 
For example, my PATHEXT variable is currently

PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH

(you'll observe I have given up on the PATHEXT mechanism - it's too much 
of a pain in the butt for me, so I just code explicit calls to the 
python interpreter).

It looks on the PATH for a file with the given name and each extension, 
and when it finds one it then runs the interpreter registered for that 
type of file.

> The reason I am trying to change the extension is, it reduces lot of 
> porting changes. No need to go to each of our file which were 
> referencing .sh file before and change it to .py.
>  
> Any Help would be greatly Appreciated.
>  
You could cheat ... if you register the .SH extension as "to be handled 
by the python interpreter" and then add .SH to PATHEXT this should work 
under Windows.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 12:04:01 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 18:04:01 +0200
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174916449.171929.138950@n76g2000hsh.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916449.171929.138950@n76g2000hsh.googlegroups.com>
Message-ID: <4607eef2$0$4542$426a74cc@news.free.fr>

kyosohma at gmail.com a ?crit :
> On Mar 26, 8:20 am, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
>> OK...
>> I've been told that Both Fortran and Python are easy to read, and are
>> quite useful in creating scientific apps for the number crunching, but
>> then Python is a tad slower than Fortran because of its a high level
>> language nature, so what are the advantages of using Python for
>> creating number crunching apps over Fortran??
>> Thanks
>> Chris
> 
> While I have never personally dealt with Fortran, I looked it up here:
> 
> http://en.wikipedia.org/wiki/Fortran_code_examples
> 
> The code examples speak for themselves. I recommend you look those
> over and then look over similar simple program written in Python.
> Python is still easier to read. Fortran also appears to be a compiled
> language, whereas Python is an interpreted language.

Being 'compiled' or 'interpreted' is not a feature of a language, but of 
a given implementation of a language (and even then, some 
implementations of some languages supports both).

wrt/ CPython (the reference implementation), it is actually compiled to 
byte-code - just like Java. The main difference being that the VM is 
smart enough to automagically (re)compile what's needed.


From betwys1 at sbcglobal.net  Sat Mar 17 14:13:26 2007
From: betwys1 at sbcglobal.net (Brian Whatcott)
Date: Sat, 17 Mar 2007 18:13:26 GMT
Subject: Phase change material ...
References: <1173405474.489111.139350@p10g2000cwp.googlegroups.com>
	<1173554707.826932.246100@30g2000cwc.googlegroups.com>
	<3tEIh.4571$B25.683@news01.roc.ny>
Message-ID: <tseov2h4mvrg4ov5dl6o7jltv1ocpm7lfv@4ax.com>

On Sat, 10 Mar 2007 20:23:27 GMT, Dan Bloomquist
<public21 at lakeweb.com> wrote:

>thermate at india.com wrote:
>
>> On Mar 8, 5:57 pm, "martinl" <goo... at mllengineering.ca> wrote:
>> 
>>>Hi All,
>>>I'm looking for a substance that does a phase change at between 60 and
>>>100 C.

>I settled for hurricane wax. (IGI-1260). But that, because I felt it 
>would suit my application, domestic heating. I have 3 thousand pounds of 
>the stuff.

>http://lakeweb.com/boiler/tubes.jpg

>Best, Dan.


I don't know how I could have overlooked this note for several days.
It sounds like a wonderfully adventurous design.
I have not been keeping up with the literature,  but phase change
media ought to be the way to go.
After all, if four tons of ice could hold a house down with a temp
differential of 20 degreesC or so, then  1.5 tons of wax might have a
good  chance of holding the temperature up with a temp differential
 of 80-20degC    = 60 degrees.

Wonder what the latent heat is? Less than 340 kJ/kg I imagine.
How much did it cost?

Brian  Whatcott   Altus OK


From sjdevnull at yahoo.com  Tue Mar  6 18:09:50 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 6 Mar 2007 15:09:50 -0800
Subject: Project organization and import
In-Reply-To: <1173203395.649560.249930@p10g2000cwp.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
	<mailman.4723.1173201596.32031.python-list@python.org>
	<1173203395.649560.249930@p10g2000cwp.googlegroups.com>
Message-ID: <1173222590.548186.229900@j27g2000cwj.googlegroups.com>

On Mar 6, 12:49 pm, "Martin Unsal" <martinun... at gmail.com> wrote:
> On Mar 6, 9:19 am, "Chris Mellon" <arka... at gmail.com> wrote:
>
> > You do? Or do you only have trouble because you don't like using "from
> > foo import Foo" because you need to do more work to reload such an
> > import?
>
> More work, like rewriting __import__ and reload??? :)
>
> There's a point where you should blame the language, not the
> programmer. Are you saying I'm lazy just because I don't want to mess
> with __import__?
>
> > What makes you think that the exposed namespace has to be isomorphic
> > with the filesystem?
>
> I don't; you do!
>
> I was clearly talking about files and you assumed I was talking about
> namespace. That's Pythonic thinking... and I don't mean that in a good
> way!
>
> > If you want to break a module into multiple packages and then stick
> > the files that make up the package in bizarre spots all over the
> > filesystem, can you give a reason why?
>
> Because I have written a project with 50,000 lines of Python and I'm
> trying to organize it in such a way that it'll scale up cleanly by
> another order of magnitude. Because I've worked on projects with
> millions of lines of code and I know about how such things are
> organized. It's funny, I'm a newbie to Python but it seems like I'm
> one of the only people here thinking about it as a large scale
> development language rather than a scripting language.
>
> Martin


I'm still not clear on what your problem is or why you don't like
"from foo import bar".  FWIW our current project is about 330,000
lines of Python code.  I do a ton of work in the interpreter--I'll
often edit code and then send a few lines over to the interpreter to
be executed.  For simple changes, reload() works fine; for more
complex cases we have a reset() function to clear out most of the
namespace and re-initialize.  I don't really see how reload could be
expected to guess, in general, what we'd want reloaded and what we'd
want kept, so I have a hard time thinking of it as a language problem.



From san_2012 at rediffmail.com  Tue Mar 20 05:23:07 2007
From: san_2012 at rediffmail.com (sandeep patil)
Date: 20 Mar 2007 02:23:07 -0700
Subject: python & java
Message-ID: <1174382587.768401.158010@p15g2000hsd.googlegroups.com>

hi

i am fresher i python can any bady tell me who i will use python in
web technologies in java base application.
what it roll

sandeep patil



From aleax at mac.com  Fri Mar 23 10:38:47 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 23 Mar 2007 07:38:47 -0700
Subject: Exception passing
References: <pan.2007.03.23.14.29.34@gmail.com>
Message-ID: <1hvf3ru.1iqe09kju50weN%aleax@mac.com>

Thomas Dybdahl Ahle <lobais at gmail.com> wrote:

> Hi, I have a function, which looks like the following:
> 
> connecting = False
> def func ():
>     global connecting
>     connecting = True
>     try:
>        # Do lot of network stuff
>     except Exception, e:
>         connecting = False
>         raise e
> 
> This works quite good, but it is a hell to debug. Instead of getting a
> log message to the line which originally raised the exception.
> 
> Is there anyway to reraise an exception, but preserve the log?

Just use
  raise
without any argument.

E.g.:

>>> def raiser():  
...   print 1/0
... 
>>> def reraise1():
...   print 'before'
...   try: raiser()
...   except Exception, e:
...     print 'after'
...     raise e
... 
>>> def reraise2():
...   print 'before'
...   try: raiser()
...   except Exception, e:
...     print 'after'
...     raise  
... 
>>> reraise1()
before
after
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 6, in reraise1
ZeroDivisionError: integer division or modulo by zero
>>> reraise2()
before
after
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 3, in reraise2
  File "<stdin>", line 2, in raiser
ZeroDivisionError: integer division or modulo by zero
>>> 

As you see, the traceback is "maintained" when you just "raise", though
it's altered when you "raise e".


Alex


From psdasilvaX at esotericaX.ptX  Sat Mar 24 15:12:58 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 24 Mar 2007 19:12:58 +0000
Subject: Join strings - very simple Q.
In-Reply-To: <1174754607.773604.85170@l77g2000hsb.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<1174746808.705538@jubilee.claranet.pt>
	<1174754607.773604.85170@l77g2000hsb.googlegroups.com>
Message-ID: <1174843589.996115@jubilee.claranet.pt>

Dustan escreveu:
> On Mar 24, 7:16 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>> Dustan escreveu:
>>
>>
>>
>>> On Mar 23, 1:30 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>>>> Mike Kent escreveu:
>>>> ...
>>>>> New way:
>>>>> l=['a','b','c']
>>>>> jl=','.join(l)
>>>> I thank you all.
>>>> Almost there ...
>>>> I tried "".join(l,',') but no success ... :-(
>>>> Paulo
>>> Perhaps you're doing it wrong, despite having an example right in
>>> front of you?
>> Some misunderstanding here ...
>> The post was just to thank. I was refering to what I tried
>> before posting the question here.
> 
> Ah. Sorry; I didn't realize that.

My fault. The post could well be read the way you did.
English is not my 1st language anyway.
Regards.
Paulo


From hq4ever at gmail.com  Mon Mar 12 06:33:58 2007
From: hq4ever at gmail.com (Maxim Veksler)
Date: Mon, 12 Mar 2007 12:33:58 +0200
Subject: programmatically manipulation environment variables of the calling
	shell
Message-ID: <b400c69a0703120333m5565c233laaf1247ed8fb5601@mail.gmail.com>

Hello list,

I'm trying to write a python script that would allow me to manipulate
shell variables of the calling shell. I'm trying to write some logic
that would know to add LD_LIBRARY_PATH to the users environment.

In bash this is done with "export", can I do this with python? (If at
all possible because python is actually a sub process of bash).

Thank you,
Maxim.

-- 
Cheers,
Maxim Veksler

"Free as in Freedom" - Do u GNU ?


From greg at cosc.canterbury.ac.nz  Thu Mar  1 18:41:08 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 02 Mar 2007 12:41:08 +1300
Subject: Writing an interpreter for language similar to python!!
In-Reply-To: <mailman.4555.1172731037.32031.python-list@python.org>
References: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
	<mailman.4555.1172731037.32031.python-list@python.org>
Message-ID: <54p6ovF21sto3U1@mid.individual.net>

Hendrik van Rooyen wrote:

> - It is going to be an inferior subset of Python -

 From what the OP said, it isn't necessarily a subset of
Python, just something whose surface syntax is similar.
The semantics could be quite different.

However, if the semantics *are* to be similar as well,
it makes a lot of sense to consider whether Python itself
could be used.

--
Greg


From jantod at gmail.com  Sun Mar  4 15:29:20 2007
From: jantod at gmail.com (Janto Dreijer)
Date: 4 Mar 2007 12:29:20 -0800
Subject: multiple content-types break cgi.py
In-Reply-To: <slrneul7rs.t3l.jon+usenet@snowy.squish.net>
References: <1173002603.690853.250090@p10g2000cwp.googlegroups.com>
	<slrneul7rs.t3l.jon+usenet@snowy.squish.net>
Message-ID: <1173040160.844329.48050@s48g2000cws.googlegroups.com>

On Mar 4, 12:29 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> In article <1173002603.690853.250... at p10g2000cwp.googlegroups.com>, Janto Dreijer wrote:
> > The Nokia Java SDK allows one to define multiple content-types in a
> > single HTTP header field. I'm not sure if it's standard, but it's
> > happening from some Java-enabled phones.
>
> > The only reference to this "bug" I can find dates back to 1999:
> >http://tinyurl.com/3ahc3r
>
> It's not a bug - sending multiple content-types is just totally broken.
> What would such a header even be supposed to mean? It's like saying
> "this is an apple orange".

Hmmm. Thanks! I suspected as much.

Rough inspection suggests that calling
    connection.setRequestProperty("Content-Type", "application/x-www-
form-urlencoded");
on the Nokia 6230 would actually cause the value to be *appended* and
not set.

Yuck! It looks like I'm going to have to keep a modified copy of
cgi.py if I want to support the phone. Or hack something on the Java
side.

Janto



From manstey at csu.edu.au  Tue Mar 13 21:23:24 2007
From: manstey at csu.edu.au (manstey)
Date: 13 Mar 2007 18:23:24 -0700
Subject: how to detect change of list of instances
Message-ID: <1173835404.477078.306410@b75g2000hsg.googlegroups.com>

how do I detect a change in a list of class instances?

from copy import deepcopy

class CaListOfObj(list):
    """ subclass of list """
    def __init__(self, *args, **kwargs):
        list.__init__(self, *args, **kwargs)

class CaClass(object):
    pass

class CaData(object):
    pass

myclass=CaClass()
a=CaData()
b=CaData()
c=CaData()

listInstances = CaListOfObj([a,b,c])
setattr(myclass,'initlist',listInstances)
setattr(myclass,'newlist',deepcopy(listInstances))

print myclass.initlist == myclass.newlist
myclass.newlist.append(c)
print myclass.initlist == myclass.newlist

gives
False
False

because deep copies of instances are different instances. what I want
to do is detect a change between .initlist and .newlist.

thanks



From AWasilenko at gmail.com  Thu Mar 22 20:54:04 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 22 Mar 2007 17:54:04 -0700
Subject: TypeError: 'int' object is not callable
Message-ID: <1174611244.465956.104060@n76g2000hsh.googlegroups.com>

I'm trying to test a few different approaches to displaying pages via
Cherrypy and I'm not having much luck.  Here is my code so far:

import sys, cherrypy, html

class Root:
	@cherrypy.expose
	def index(self, pageid = None):
		selection = html.Page()
		return  selection.input()


cherrypy.config.update({'server.socket_port': 2572, 'log.screen':
False})
cherrypy.quickstart(Root())

and here is the html.py file that I import:

class Page:
	def input(self,dex=None):
		if dex == None:
			return 404(dex)
		else:
			return "Something else?"

	def err404(self,whatitis="N/A"):
		return """<body bgcolor="#666666">
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /
><br /><br /><br /><br />
<center>Sorry the page: """ + str(whatitis) + """ does not exist.<br /
>
<img src="/files/images/404.png" alt="Page cannot be found."></center>
</body>"""

and here is the error I get when trying to run this:

500 Internal Server Error
The server encountered an unexpected condition which prevented it from
fulfilling the request.

Traceback (most recent call last):
  File "/home2/awasilenko/lib/python2.4/cherrypy/_cprequest.py", line
342, in respond
    cherrypy.response.body = self.handler()
  File "/home2/awasilenko/lib/python2.4/cherrypy/_cpdispatch.py", line
15, in __call__
    return self.callable(*self.args, **self.kwargs)
  File "/home2/awasilenko/webapps/cp/site.py", line 7, in index
    return  selection.input()
  File "/home2/awasilenko/webapps/cp/html.py", line 4, in input
    return 404(dex)
TypeError: 'int' object is not callable

I know this isn't a Cherrypy issue since I have made other pages work,
I'm just making a dumb mistake somewhere.  My plan is to eventually be
able to pass dex to the input def in the page class so it can display
the right page.  Right now I am just trying to make ANY thing show up,
what should happen is since I'm not passing anything everything should
be None and the 404 page should pop up.  I would also like to make the
404 page print the page that was requested, I have already coded the
return but have not "connected" it yet, one step at a time...



From mmoum at woh.rr.com  Sat Mar 24 18:08:42 2007
From: mmoum at woh.rr.com (Mike)
Date: Sat, 24 Mar 2007 18:08:42 -0400
Subject: qt ver. 3, linux, windows, and modal forms
Message-ID: <4605a174$0$5225$4c368faf@roadrunner.com>

Hi,

I'm having a problem with modal forms on windows. I've written a very 
short test program, with a main window and a form called from the main 
window. The form is set to modal with form.setModal(1) before calling 
form.show().

All works as expected on Linux. The form is modal, not allowing the main 
window to received the focus. If I call the form from within itself, the 
topmost form is modal, and not of the previous forms will receive the 
focus until the topmost form is closed; then the next topmost is modal, 
and so on.

However, on Windows XP Pro (at work - don't use windows at home), the 
form is not modal. The main window will receive the focus with a mouse 
click even though the modal form is still on top.

The source code is identical on both OS's.

Has anyone run into this before? Is there a fix? I haven't been able to 
find anything with google searches, and Trolltech's forums don't seem to 
have any entries addressing the problem, either.

I have a progam that I'm writing for work using Qt and Python, which was 
like pulling teeth with our Microsoft oriented IT department, and I very 
much do not want to tell them that it's not going to work (modal forms 
are essential).

Thanks for your help,
Mike


From deets at nospam.web.de  Tue Mar  6 07:40:00 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 Mar 2007 13:40:00 +0100
Subject: CherryPy + Database questions
References: <mailman.4673.1173101612.32031.python-list@python.org>
	<552l55F22aph6U1@mid.uni-berlin.de>
	<1173153806.918779.241900@j27g2000cwj.googlegroups.com>
Message-ID: <5555p0F21i8s3U1@mid.uni-berlin.de>

> SQLite isn't really a DBMS at all, it's just a library. 

Where is the difference? From the DB-API-side none. And there are plenty of
DBs out there that work similar, like MS Access. Show me where it is
written that a DBMS has to run as separate server process.

> According to 
> their FAQ (http://www.sqlite.org/faq.html#q8) it is only threadsafe as
> long as you aren't changing the same DB in separate threads (so no,
> not threadsafe at all).

I'm not sure if I share your POV. According to the DB API threadsafty
attribtue, it's safe to have multiple threads working on a single DB if
each has his own connection. Which is a common idiom anyway.

And AFAIK e.g. TurboGears doesn't perform any special measures to
synchronize cherrypy worker threads when using sqlite, albeit I'm not 100%
sure on this.

Diez


From http  Sat Mar 10 19:04:00 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 16:04:00 -0800
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<7xr6rwhpdb.fsf@ruckus.brouhaha.com>
	<mailman.4922.1173568136.32031.python-list@python.org>
	<7xhcssllyi.fsf@ruckus.brouhaha.com>
	<mailman.4923.1173571172.32031.python-list@python.org>
Message-ID: <7xslccr6hb.fsf@ruckus.brouhaha.com>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:
> > If you use %u you get a very large positive value, not +3.
> Exactly, and that's the right value. (unsigned int)(-3) isn't +3.

The OP specified that the expected result was 3.


From steve at holdenweb.com  Wed Mar 21 13:53:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 13:53:00 -0400
Subject: Testing Python updates
In-Reply-To: <1174488951.275163.305440@y66g2000hsf.googlegroups.com>
References: <1174488951.275163.305440@y66g2000hsf.googlegroups.com>
Message-ID: <etrrgf$qte$2@sea.gmane.org>

Matthew wrote:
> Hello:
> 
> What is the methodology for testing the updates to the Python
> language?

http://www.pybots.org/

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From http  Sun Mar 11 17:28:15 2007
From: http (Paul Rubin)
Date: 11 Mar 2007 13:28:15 -0800
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
Message-ID: <7xy7m3tqq8.fsf@ruckus.brouhaha.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> 	Pardon? What is "the right thing with signed zeros"... In the last
> 30 years I've been on machines that normalize floating zero into a true
> zero (all bits are zero: mantissa, exponent, and sign). This is the
> first time I've even seen a variable output as a negative 0.0!

Most machines these days use IEEE 754 which supports negative zero.

http://en.wikipedia.org/wiki/Negative_zero


From mailmaverick666 at gmail.com  Tue Mar 20 05:34:18 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Tue, 20 Mar 2007 15:04:18 +0530
Subject: python & java
In-Reply-To: <1174382587.768401.158010@p15g2000hsd.googlegroups.com>
References: <1174382587.768401.158010@p15g2000hsd.googlegroups.com>
Message-ID: <180b672e0703200234g3013b0berc599e38a35305da0@mail.gmail.com>

See www.*jython*.org

On 20 Mar 2007 02:23:07 -0700, sandeep patil <san_2012 at rediffmail.com>
wrote:
>
> hi
>
> i am fresher i python can any bady tell me who i will use python in
> web technologies in java base application.
> what it roll
>
> sandeep patil
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From bignose+hates-spam at benfinney.id.au  Mon Mar 19 04:48:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 19 Mar 2007 19:48:37 +1100
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
Message-ID: <87lkht8vq2.fsf@benfinney.id.au>

"momobear" <wgwigw at gmail.com> writes:

> class coffee:
>          def __init__(self):
>               '''
>               do something here
>               '''
>          def  boil(self):
>                self.temp = 80
>
> a = coffer()
> if a.temp > 60:
>      print "it's boiled"

    class Coffee(object):
        def __init__(self):
            self.temp = 20
        def boil(self):
            self.temp = 80

    a = coffee()
    if a.temp > 60:
        print "it's boiled"

In Python, it's conventional to name classes in TitleCase, and
instances in lower_case.

It's also best to inherit every class from another class, leading to a
single hierarchy for all classes and types. 'object' is the one to
choose if you don't want the behaviour of any other class.


As for the original question: the __init__ method of a class is called
immediately after the constructor, so that's the place to initialise
any instance attributes.

-- 
 \      "At my lemonade stand I used to give the first glass away free |
  `\          and charge five dollars for the second glass. The refill |
_o__)                         contained the antidote."  -- Emo Philips |
Ben Finney



From kyosohma at gmail.com  Wed Mar 28 14:14:52 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 28 Mar 2007 11:14:52 -0700
Subject: Hpw make lists that are easy to sort.
In-Reply-To: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>
Message-ID: <1175105692.176117.133100@o5g2000hsb.googlegroups.com>

On Mar 28, 12:12 pm, Anton Vredegoor <anton.vredeg... at gmail.com>
wrote:
> Python's sorting algorithm takes advantage of preexisting order in a
> sequence:
>
> #sort_test.py
> import random
> import time
>
> def test():
>      n = 1000
>      k = 2**28
>
>      L = random.sample(xrange(-k,k),n)
>      R = random.sample(xrange(-k,k),n)
>
>      t = time.time()
>      LR = [(i+j) for i in L for j in R]
>      print time.time()-t
>      LR.sort()
>      print time.time()-t
>
>      print
>
>      t = time.time()
>      #L.sort()
>      R.sort()
>      presorted_LR = [(i+j) for i in L for j in R]
>      print time.time()-t
>      presorted_LR.sort()
>      print time.time()-t
>
> if __name__=='__main__':
>      test()
>
> On this -very slow- computer this prints:
>
>  >d:\python25\pythonw -u "sort_test.py"
> 1.10000014305
> 8.96000003815
>
> 1.10000014305
> 5.49000000954
>  >Exit code: 0
>
> Presorting the second sequence gains us more than three seconds. I
> wonder if there is a way to generate the combined items in such a way
> that sorting them is even faster? Is there some other sorting algorithm
> that can specifically take advantage of this way -or another way- of
> generating this list?
>
> The final sequence is len(L)*len(R) long but it is produced from only
> len(L)+len(R) different items, is it possible to exploit this fact? I'd
> also be interested in a more general solution that would work for
> summing the items of more than two lists in this way.
>
> A.

I found a website that hopefully will point you in the right
direction:

http://wiki.python.org/moin/HowTo/Sorting

And this one has an interesting profile of various sort methods with
Python:

http://www.biais.org/blog/index.php/2007/01/28/23-python-sorting-efficiency

Enjoy,

Mike



From Barkmann at gmail.com  Mon Mar  5 13:39:40 2007
From: Barkmann at gmail.com (Chris)
Date: 5 Mar 2007 10:39:40 -0800
Subject: FloatCanvas in a wxpython application.... layout problems
In-Reply-To: <mailman.4278.1172094038.32031.python-list@python.org>
References: <mailman.4278.1172094038.32031.python-list@python.org>
Message-ID: <1173119980.413771.25750@8g2000cwh.googlegroups.com>

On Feb 21, 1:40 pm, "nelson -" <nelson1... at gmail.com> wrote:
> Hi all,
>  i'm developing an application that uses Floatcanvas to diplay a
> cartesian plane. how can i embed it into a "complex" layout?

Your best bet is either the floatcanvas list:

http://mail.mithis.com/cgi-bin/mailman/listinfo/floatcanvas

or the wxPython-users list:

http://www.wxpython.org/maillist.php

In this case, putting a FloatCanvas in an app is no different than
putting any wx.Panel in, so the wxPython list would be fine.

-Chris



From kyosohma at gmail.com  Fri Mar 30 16:23:20 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 13:23:20 -0700
Subject: Tkinter menu question--how to pass arguments
In-Reply-To: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
References: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
Message-ID: <1175285826.971400.321470@y80g2000hsf.googlegroups.com>

On Mar 30, 2:32 pm, Kevin Walzer <k... at codebykevin.com> wrote:
> I'm having difficulty structuring a Tkinter menu entry. Here is the
> command in question:
>
> self.finkmenu.add_command(label='Update List of Packages',
> command=self.authorizeCommand(self.scanPackages))
>
> When I start my program, it crashes because it's trying to run the
> command self.authorizeCommand. The reason I'm structuring it in this
> fashion is that this command takes another command as an argument--in
> this case, self.ScanPackages.
>
> The basic structure of the program is that the self.authorizeCommand
> function pops up a dialog box for a password; it then feeds the password
> to the function that it takes as an argument, i.e. self.scanPackages.
>
> I tried setting up the menu entry without the additional parameter, i.e.
> command=self.authorizeCommand, but then when I try to run the command
> from the menu, it complains there are not enough arguments.
> Unsurprising, since self.authorizeCommand takes another function name as
> an argument.
>
> How can I structure the menu item to reflect the correct number of
> arguments without it trying to execute the command?
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

There are various ways to accomplish this. The 2 most popular that I
am aware of are using a helper function or lambda.

using a lambda:

command=(lambda:self.authorizeCommand(self.scanPackages))


using a handler (i.e. indirection layer):

def func():
   self.authorizeCommand(self.scanPackages)

self.finkmenu.add_command(label='Update List of
Packages',command=func)


Both of these are talked about in detail in "Programming Python 3rd
Ed" by Lutz. I found that helpful for me. Of course, I decided to stop
using Tkinter and switched to wxPython. Hope this gets you going
though.

Mike



From nick at craig-wood.com  Mon Mar 26 07:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 26 Mar 2007 06:30:04 -0500
Subject: Sending ECHO_REQUEST (pinging) with python
References: <pan.2007.03.26.06.30.33@gmail.com>
	<mailman.5617.1174898513.32031.python-list@python.org>
Message-ID: <slrnf0f9tl.ar4.nick@irishsea.home.craig-wood.com>

Michael Bentley <michael at jedimindworks.com> wrote:
>  On Mar 26, 2007, at 1:30 AM, Thomas Dybdahl Ahle wrote:
> > It seems however that I have to be root to send those imcp
> > packages, but I guess there must be a workaround since I can
> > easily use the "ping" command as ordinary user.
> 
>  The workaround your ping command is using btw, is probably running  
>  suid root.

Under linux the only priviledge you need is CAP_NET_RAW.  It is
possible to give this to a process - a bit of searching with google
will show you how!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From godzillaismad at gmail.com  Fri Mar 23 06:47:14 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 23 Mar 2007 03:47:14 -0700
Subject: Create new processes over telnet in XP
Message-ID: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>

Hello,

How do you create/spawn new processes in XP over telnet using python?
I.e. I would like to create a new process and have it running in the
background... when I terminate the telnet connection, I would what the
spawned processes to keep running until I shut it off...

I got the os.popen method to spawn a new process running in the
backgroun, but not over telnet... tried os.popen[2, 3, 4] and also
subprocesses.popen without any luck...

Any help will be appreciated... thankyou.



From deets at nospam.web.de  Thu Mar  8 02:55:33 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 Mar 2007 08:55:33 +0100
Subject: persistent fifo queue class
In-Reply-To: <4011626.Sbva7xkoP2@teancum>
References: <3240528.rhEsMVbDK6@teancum> <554m4vF22dgrpU2@mid.uni-berlin.de>
	<4011626.Sbva7xkoP2@teancum>
Message-ID: <559tslF24a8qrU1@mid.uni-berlin.de>

David Bear schrieb:
> Diez B. Roggisch wrote:
> 
>> David Bear schrieb:
>>> I'm looking to see if there are any examples or prewritting fifo queue
>>> classes. I know this is a broad topic. I'm looking to implement a simple
>>> application where a web server enqueue and pickle using a local socket on
>>> to a 'queue server' -- and then I will have another application dequeue
>>> the pickles again using a local socket.
>> Why don't you use a DB for that? If you want pickles, use a  blob
>> column. But all the rest - a defined protocol, stable server,
>> transactions - you get for free.
>>
>> Diez
> 
> Thanks for the suggestion. I did think of this. Indeed the final destination
> of the data is in a db. However, the postsgresql server is on a separate
> box. It will be connected via a private lan. I was worried that possible
> network disruptions would cause either the web application to hang -- or
> data to just get lost. I was thinking along the lines is a message queue
> architecture, where the web app would push data directly onto a queue --
> and then a worker app would dequeue the data and handle it by sending it to
> the db server or otherwise.

Well, if your DB connection is flaky, data will be corrupted - or lost. 
In any case. What good does it do for you to have the messages then? And 
what if the Harddisk the file sits on is corrupt? And don't forget the 
added complexity of a home-brewn solution with all its possible errors - 
much more likely to cause data loss.


Diez


From domma at procoders.net  Fri Mar  2 10:17:55 2007
From: domma at procoders.net (Achim Domma)
Date: Fri, 02 Mar 2007 16:17:55 +0100
Subject: Python GUI + OpenGL
Message-ID: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>

Hi,

I'm developing a GUI app in Python/C++ to visualize numerical results. 
Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there 
are no windows binaries for Python 2.5 for quite some time now.

I need a OpenGL context without restrictions and some settings dialogs. 
Is wx + PyOpenGL the way to go? Or could somebody recommend a better set 
of tools/libs?

regards,
Achim


From aleax at mac.com  Sat Mar  3 21:22:09 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 18:22:09 -0800
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
	<45e9b753$0$8983$4c368faf@roadrunner.com>
	<1huecz7.1thcn0b1j64biiN%aleax@mac.com>
	<1172960883.340892.183850@31g2000cwt.googlegroups.com>
	<1hueupp.1dcf9wl17pyf2bN%aleax@mac.com>
	<1172973970.929910.111000@s48g2000cws.googlegroups.com>
Message-ID: <1huew97.129d6nb4qmb42N%aleax@mac.com>

MonkeeSage <MonkeeSage at gmail.com> wrote:

> On Mar 3, 7:54 pm, a... at mac.com (Alex Martelli) wrote:
> > Besides missing the warning in the __init__, this also has pretty weird
> > behavior whenever subject to a .pop, .update, .setdefault, del of either
> > item or attr, etc, etc: the attributes and items "get out of sync" (and,
> > catching each and every mutating-method to keep the separate dicts of
> > items and attrs in perfect sync is somewhat of a nightmare).
> 
> Good points. There are many complexities involved, and little actual
> gain. Saving three or four chars isn't worth all the trouble. I hadn't
> fully thought-out the situation.

You make a good point.  I do like being able to say foo.bar=baz rather
than foo['bar']=baz in certain cases -- not so much to save 3 chars, but
to avoid excessive punctuation; however, I don't really need this AND
all of dict's power at the same time, so, I don't inherit from dict:-).


Alex


From exarkun at divmod.com  Sat Mar 24 16:19:43 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 24 Mar 2007 15:19:43 -0500
Subject: Python object overhead?
In-Reply-To: <1174766882.119041.294020@y66g2000hsf.googlegroups.com>
Message-ID: <20070324201943.18920.2076264303.divmod.quotient.5362@ohm>

On 24 Mar 2007 13:08:02 -0700, 7stud <bbxx789_05ss at yahoo.com> wrote:
>On Mar 23, 4:04 pm, Jack Diederich <jackd... at jackdied.com> wrote:
>>
>> If you make the record a new style class (inherit from object) you can
>> specify the __slots__ attribute on the class.  This eliminates the per
>> instance dictionary overhead in exchange for less flexibility.
>>
>
>How is efficiency improved with __slots__?  Don't you create a list
>object that replaces the dictionary object, e.g.:
>
>class Test(object):
>        __slots__ = ["m", "n"]
>

Only one list is created.  It is used to define a C array where attributes
will be stored.  Each instance still has that C array, but it has much less
overhead than a Python list or dictionary.

Whether this reduction in overhead actually results in a useful or measurable
performance improvement is a separate question, of course.

Jean-Paul



From robert.kern at gmail.com  Fri Mar 30 19:32:02 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 30 Mar 2007 18:32:02 -0500
Subject: Indentation for code readability
In-Reply-To: <pan.2007.03.30.13.23.40.465374@REMOVE.THIS.cybersource.com.au>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<pan.2007.03.30.13.23.40.465374@REMOVE.THIS.cybersource.com.au>
Message-ID: <euk6lr$nlb$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Fri, 30 Mar 2007 02:04:45 -0700, DE wrote:
> 
>> Hello,
>>
>> Here is what I do in C++ and can not right now in python :
>>
>> pushMatrix()
>> {
>>      drawStuff();
>>
>>      pushMatrix();
>>      {
>>             drawSomeOtherStuff()
>>      }
>>      popMatrix();
>> }
>> popMatrix();
>>
>> The curly brackets have no functional meaning 
>> but increase the readability significantly. 
> 
> I don't understand why you are indenting 
> the function calls. What does the
> indentation and spacing signify?

pushMatrix() pushes a transformation matrix onto the stack of transformation
matrices. The drawing functions draw inside this context of transformations.
popMatrix() pops the last transformation matrix. For example, one could push a
rotation matrix that rotates the coordinate system 90 degrees from horizontal.
drawStuff() might draw some text; usually this would be horizontal, but in the
context of the transformation, it will ultimately be drawn vertically.

As others have mentioned, this is a perfectly good application of Python 2.5's
"with" statement and its context managers. The indentation is meaningful and useful.

> Some people 
>     have a strange 
>         idea of 
>     "increase 
> readability".

Please contain the snark. You didn't understand why someone might want this, and
that's fine. But please wait until you get a response before assuming that there
could be no good reason for wanting this.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From jgodoy at gmail.com  Mon Mar 12 08:33:02 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 12 Mar 2007 09:33:02 -0300
Subject: How to modify the source of a python file inside a python egg
	file?
References: <1173670160.897478.34450@j27g2000cwj.googlegroups.com>
Message-ID: <87odmyvdz5.fsf@gmail.com>

"yinglcs at gmail.com" <yinglcs at gmail.com> writes:

> How to modify the source of a python file inside a python egg file?
> I can see the file by unzipping it, but how can I package it back as a
> python egg file after my modification.

The correct way is to download the source, make your changes and rebuild the
egg.

Unzipping, changing and zipping it back also works.

-- 
Jorge Godoy      <jgodoy at gmail.com>


From python-url at phaseit.net  Fri Mar 30 20:04:37 2007
From: python-url at phaseit.net (Cameron Laird)
Date: Sat, 31 Mar 2007 00:04:37 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Mar 30)
Message-ID: <euk8il$29f$1@lairds.us>

QOTW:  "I have a fake supervisor reference generator for job interviews, a
fake house inspection generator for real estate transactions, and a fake
parole testimony generator - maybe you could adapt one of them
(unfortunately, they are written in dissembler)." - Paul McGuire

"... I think that [PyPy] is the most interesting work in CS in many
years." - Jacob Hallen


    PyPy 1.0 is ready--yippee!
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/5d2675e6895a9daf/
    Notice Jacon Hallen's advertisement of the benefits of PyPy.
	
    Alex Martelli and Facundo Batista explain the Python perspective
    on timing-out HTTP requests:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/ff84e7340988c168/

    Paul McGuire illustrates the intent and use of his valuable
    pyparsing module:
	http://groups.google.com/group/comp.lang.python/msg/ee4129aee0f33efc
	http://groups.google.com/group/comp.lang.python/msg/39337f2c6148e927

    More Pythoneers should be familiar with timing and related
    measurements.  Alex Martellii aptly illustrates how rewarding
    it can be in the hands of a master:
	http://groups.google.com/group/comp.lang.python/msg/785e1571d3c9b468

    Mode of a collection is a sort of reverse-lookup statistic that
    interestingly models many other useful calculations.  Notice how
    succinctly idiomatic Python solves the problem:
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/23da16a5fc2ca39d/


========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    The Python Papers aims to publish "the efforts of Python enthusiats".
	http://pythonpapers.org/

    Readers have recommended the "Planet" sites:
	http://planetpython.org
	http://planet.python.org

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/python/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Many Python conferences around the world are in preparation.
    Watch this space for links to them.

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From paul at boddie.org.uk  Sun Mar  4 14:28:13 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Mar 2007 11:28:13 -0800
Subject: How use XML parsing tools on this one specific URL?
In-Reply-To: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <1173036493.121242.290860@64g2000cwx.googlegroups.com>

seberino at spawar.navy.mil wrote:
> I understand that the web is full of ill-formed XHTML web pages but
> this is Microsoft:
>
> http://moneycentral.msn.com/companyreport?Symbol=BBBY

Yes, thank you Microsoft!

> I can't validate it and xml.minidom.dom.parseString won't work on it.
>
> If this was just some teenager's web site I'd move on.  Is there any
> hope avoiding regular expression hacks to extract the data from this
> page?

The standards adherence from Microsoft services is clearly at "teenage
level", but here's a recipe:

import libxml2dom
import urllib
f = urllib.urlopen("http://moneycentral.msn.com/companyreport?
Symbol=BBBY")
d = libxml2dom.parse(f, html=1)
f.close()

You now have a document which contains a DOM providing libxml2's
interpretation of the HTML. Sadly, PyXML's HtmlLib doesn't seem to
work with the given document. Other tools may give acceptable results,
however.

Paul



From bj_666 at gmx.net  Sun Mar 18 12:19:16 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 18 Mar 2007 17:19:16 +0100
Subject: list comprehension help
References: <mailman.5246.1174234283.32031.python-list@python.org>
Message-ID: <pan.2007.03.18.16.19.15.533898@gmx.net>

In <mailman.5246.1174234283.32031.python-list at python.org>,
rkmr.em at gmail.com wrote:

> I need to process a really huge text file (4GB) and this is what i
> need to do. It takes for ever to complete this. I read some where that
> "list comprehension" can fast up things. Can you point out how to do
> it in this case?

No way I can see here.

> f = open('file.txt','r')
> for line in f:
>         db[line.split(' ')[0]] = line.split(' ')[-1]
>         db.sync()

You can get rid of splitting the same line twice, or use `split()` and
`rsplit()` with the `maxsplit` argument to avoid splitting the line at
*every* space character.

And if the names give the right hints `db.sync()` may be a potentially
expensive operation.  Try to call it at a lower frequency if possible.

Ciao,
	Marc 'BlackJack' Rintsch


From mtobis at gmail.com  Wed Mar 28 12:22:16 2007
From: mtobis at gmail.com (Michael Tobis)
Date: 28 Mar 2007 09:22:16 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <56uk2aF29sotsU1@mid.individual.net>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<7o4ld4-qrv.ln1@lairds.us>
	<1174958090.292094.168150@e65g2000hsc.googlegroups.com>
	<56uk2aF29sotsU1@mid.individual.net>
Message-ID: <1175098936.430665.91580@n76g2000hsh.googlegroups.com>

I feel obligated to fan the flames a bit by pointing to
http://www.fortranstatement.com/ a site which advocates discontinuing
development of Fortran and does a good job of summarizing the problems
with the contemporary development of that language.

I am not convinced that a new high performance language (Chapel,
Fortress, etc.) is necessary. Rather, I feel that FORTRAN 77 is a
mature tool, and that it, in combination with a powerful dynamic
language (Python being my choice) is entirely sufficient for any
foreseeable scientific computing.

Fortran 90 and successors (F9* in the following) provide a baroque and
elaborate effort to bolt modern computing methods over a finely honed
special purpose tool (F77) that manages large numerical arrays
spectacularly well. It is as if you decided to add a web search engine
(an elaborate, developing set of requirements) to grep (a finely honed
special purpose tool). It makes much more sense to add greplike
features to your websearch tool than to try to foist
"Grep95" (competing with the Google search engine) on everyone who
ever needs to find a misplaced text file.

F77 interfaces smoothly and neatly with Python. F9* continues to be
the single most difficult case for interoperability with any other
contemporary algorithmic language. Fortunately there is hope within
the new standard, where an "interoperability" flag will force F2003 to
deliver arrays that are exportable. In exchange for this balkiness,
F9* offers crude and verbose implementations of encapsulation and
inheritance.

I am sure Dr Beliavsky and some others are productive with F9*, but I
would strongly advocate against it for anyone in a position to make a
choice in the matter. Some people are competent with hand-powered
drills, but I wouldn't set up a furniture production line with them on
that basis.

The performance and library advantages of Fortran are all available in
F77. Higher level abstractions can easily be wrapped around the low
level structures using Python and f2py. Making the combination
performance-efficient requires some skill, but making a pure Fortran
implementation efficient does no less so.

I don't think we should or can abandon the excellent infrastructure
provided by the Fortran of a generation ago. However, I am totally
unconvinced that there is a point to a backward compatible extension
to F77 that tries to support OOP and other abstractions unimaginable
in the early days of Fortran.

F77 and its numerical libraries are mature and complete. I think we
should treat it as a remarkable set of packages, and move on.

For any purposes I know of not involving an existing F9* legacy, I
believe that Python plus F77 is as good as or superior to F9* alone.
This includes the total time needed to learn the tools, (I think it is
easier to learn Python, F77 and f2py than to learn F9* alone to any
comparable skill level.) total time needed to develop the code, whole
system performance, testability and maintainability. Once Python gets
a first-class array type things will be even smoother as I understand
it.

mt



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 12:13:22 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 18:13:22 +0200
Subject: Python object overhead?
In-Reply-To: <mailman.5633.1174921823.32031.python-list@python.org>
References: <mailman.5530.1174684299.32031.python-list@python.org>	<56ja46F28lpp9U1@mid.individual.net>
	<mailman.5633.1174921823.32031.python-list@python.org>
Message-ID: <4607f123$0$3225$426a74cc@news.free.fr>

Matt Garman a ?crit :
(snip)
> Also, many folks have suggested operating on only one line at a time
> (i.e. not storing the whole data set).  Unfortunately, I'm constantly
> "looking" forward and backward in the record set while I process the
> data (i.e., to process any particular record, I sometimes need to know
> the whole contents of the file).  (This is purchased proprietary
> vendor data that needs to be converted into our own internal format.)

Don't know if this could solve your problem, but have considered using 
an intermediate (preferably embedded) SQL database (something like 
SQLite) ?



From thinker at branda.to  Tue Mar 13 01:00:19 2007
From: thinker at branda.to (Thinker)
Date: Tue, 13 Mar 2007 13:00:19 +0800
Subject: Starting Python... some questions
In-Reply-To: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
Message-ID: <45F62FE3.5090408@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

jezonthenet at yahoo.com wrote:
> I started using Python a couple of days ago - here are a few
> questions:
>
> * Doesn't the __main__() method automatically execute when I run my
> python program?
> * Only when I do an import of my test.py file within python and then
> run test.__main__() I can see where my bugs are. Is this correct?
> (right now this is my only way of running my python program and see
> where I have problems)
> * Once I've done an import and then I wish to make a change to the
> file I've imported I have to quit Python, restart and import that
> module again in order for the module to be refreshed. Is there no "re-
> import" ?
> * Finally, could someone tell me why I'm having problems with the
> small module below?
> - Python pretends I provide chassis_id() with three parameters, even
> though I clearly only provide it with two - why?
No, Python is executing a module. You should explicit call __main__()
at top scope of
your module. For ex.

if __name__ == '__main__':
__main__()

This snippet calls __main__() when the module is executed directly,
but not imported as a module.

Once a module had been imported, you should invoke reload() function
to reload it from filesystem.


- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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From aisaac at american.edu  Sat Mar 10 16:04:39 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 10 Mar 2007 21:04:39 GMT
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05>
	<55avniF23jpl2U1@mid.individual.net><mailman.4813.1173388535.32031.python-list@python.org><G1mIh.25$qe5.19@trnddc05><mailman.4877.1173484222.32031.python-list@python.org><7LnIh.327$mh7.197@trnddc04>
	<mailman.4901.1173538554.32031.python-list@python.org>
Message-ID: <H3FIh.92$qe5.32@trnddc05>

> Alan:
>> I really think you should reread the PEP, which is making
>> the opposite of your point.

Skip:
> Quite the opposite, in fact.  Laura Creighton wrote that
> PEP precisely with the expectation (and hope) that Guido
> would reject it, which he did:  Note the title and status.

Sorry Skip, but this is really just a matter of taking off
your blinkers and learning to read.  As you say, note the
title and status.  Or alternatively, read this from the PEP:

        I figure if I make this PEP, we can then ask Guido
        to quickly reject it, and then when this argument
        next starts up again, we can say 'Guido isn't
        changing things to suit the tab-haters or the
        only-tabbers, so this conversation is a waste of
        time.'

Alan Isaac





From ptmcg at austin.rr.com  Sat Mar 24 18:55:23 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Mar 2007 15:55:23 -0700
Subject: Anyone know of a MICR parser algorithm written in Python?
In-Reply-To: <1174763132.786644.161500@y66g2000hsf.googlegroups.com>
References: <1174763132.786644.161500@y66g2000hsf.googlegroups.com>
Message-ID: <1174776923.618895.232630@y80g2000hsf.googlegroups.com>

On Mar 24, 2:05 pm, "mkppk" <barnaclej... at gmail.com> wrote:
> MICR = The line of digits printed using magnetic ink at the bottom of
> a check.
>
> Does anyone know of a Python function that has been written to parse a
> line of MICR data?
> Or, some financial package that may contain such a thing?
> Or, in general, where I should be looking when looking for a piece of
> Python code that may have already been written by someone?
>
> I'm working on a project that involves a check scanner the produces
> the raw MICR line as text.
>
> Now, that raw MICR needs to be parsed for the various pieces of info.
> The problem with MICR is that there is no standard layout. There are
> some general rules for item placement, but beyond that it is up to the
> individual banks to define how they choose to position the
> information.
>
> I did find an old C program written by someone at IBM... But I've read
> it and it is Not code that would nicely convert to Python (maybe its
> all the Python I'm used to, be it seems very poorly written).
>
> Here is the link to that C code:ftp://ftp.software.ibm.com/software/retail/poseng/4610/4610micr.zip
>
> I've even tried using boost to generate a Python module, but that
> didn't go well, and in the end is not going to be a solution for me
> anyway.. really need access to the Python source.
>
> Any help at all would be appreciated,
>
> -mkp

Is there a spec somewhere for this data?  Googling for "MICR data
format specification" and similar gives links to specifications for
the MICR character *fonts*, but not for the data content.

And you are right, reverse-engineering this code is more than a 10-
minute exercise.  (However, the zip file *does* include a nice set of
test cases, which might be better than the C code as a starting point
for new code.)

-- Paul



From http  Tue Mar 20 01:19:10 2007
From: http (Paul Rubin)
Date: 19 Mar 2007 21:19:10 -0800
Subject: How to calculate a file of equations in python
References: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>
Message-ID: <7x648w331t.fsf@ruckus.brouhaha.com>

"John" <Allerdyce.John at gmail.com> writes:
> I have a text file which contains math expression, like this
> 134
> +234
> +234

Erm, is this a homework assignment?  Basicaly you need to identify all
the separate operands and operators and decide what to do with them.
I'm guessing you don't have to worry about operator precedence, for
example the rule that 2+3*5 is treated as 2+(3*5) because * has
precedence over +.  Anyway the idea is keep a running total and
read through the input lines updating the total for each line.


From bthom at cs.hmc.edu  Fri Mar 23 13:52:09 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Fri, 23 Mar 2007 10:52:09 -0700
Subject: exit to interpreter?
Message-ID: <B67ED58E-8982-43E0-8199-694763047BC2@cs.hmc.edu>

Hi,

I'm writing a function that polls the user for keyboard input,  
looping until it has determined that the user has entered a valid  
string of characters, in which case it returns that string so it can  
be processed up the call stack. My problem is this. I'd also like it  
to handle a special string (e.g. 'quit'), in which case control  
should return to the Python command line as opposed to returning the  
string up the call stack.

sys.exit seemed like a good choice, but it exits the python interpreter.

I could use an exception for this purpose, but was wondering if  
there's a better way?

--b


From robin at reportlab.com  Thu Mar 29 06:17:45 2007
From: robin at reportlab.com (Robin Becker)
Date: Thu, 29 Mar 2007 11:17:45 +0100
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <D78AD813-12F4-49D2-81B3-157681FEC6A4@stackless.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>	<euenc1$fks$1@nemesis.news.tpi.pl>
	<D78AD813-12F4-49D2-81B3-157681FEC6A4@stackless.com>
Message-ID: <460B9249.5020200@chamonix.reportlab.co.uk>

Christian Tismer wrote:
.......
>> something
>> special, I am unable to dream of? Or is it purely academic project to
>> create Python VM in Python?
> 
> It will eventually give you a GIL-free VM, and it already gives you
> a lot more than you have dreamt of.
> 
> There is one feature missing that is probably hard to add.
> Handling the 'posters who are not willing to read before they post'  
> syndrome.
.......

I come from an academic background (sadly not in computer science) so I 
understand the need to promote the abstract advances that are being made here.

However, I am a bit confused about the applicability of pypy. All the talk of 
backends, annotation object spaces etc etc may make some sense to really 
interested parties, but I would like to know what I can do in real terms with 
the new interpreters?

The demo javascript stuff seems a bit fake since others have already done some 
work in that direction already using ordinary python. RPython may be larger or 
smaller than those subsets, but that's not clear.

I would be interested to know if it's possible to point a tool at an existing 
python-2.4 module and wrap it into a much faster extension that can be used by 
my CPython stuff. I know there is preliminary work in that direction.

I am hugely encouraged by this

C:\Python\devel\pypy-1.0.0>\python24\python \python\lib\test\pystone.py
Pystone(1.1) time for 50000 passes = 1.49586
This machine benchmarks at 33425.6 pystones/second

C:\Python\devel\pypy-1.0.0>.\pypy-c.exe \python\lib\test\pystone.py
Pystone(1.1) time for 50000 passes = 2.16123e-005
This machine benchmarks at 2.3135e+009 pystones/second


:) not


-- 
Robin Becker



From chris.lasher at gmail.com  Tue Mar 27 01:08:11 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 26 Mar 2007 22:08:11 -0700
Subject: build python on Celeron D
In-Reply-To: <mailman.5650.1174965907.32031.python-list@python.org>
References: <mailman.5650.1174965907.32031.python-list@python.org>
Message-ID: <1174972091.173999.9650@n59g2000hsh.googlegroups.com>

On Mar 26, 10:48 pm, Christian <ckk... at hoc.net> wrote:
> Traceback (most recent call last):
>   File "setup.py", line 89, in ?
>     setup_package()
>   File "setup.py", line 59, in setup_package
>     from numpy.distutils.core import setup
>   File "/mnt/home/ck/prog/scipy/numpy-1.0.1/numpy/__init__.py", line 36, in ?
>   File "numpy/core/__init__.py", line 5, in ?
>     import multiarray
> ImportError:
> /media/hda6/home/ck/prog/scipy/numpy-1.0.1/numpy/core/multiarray.so: undefined
> symbol: Py_InitModule4
>
> which is related to 32<->64 issues, right?

<http://www.thescripts.com/forum/thread35987.html>

Do you have more than one Python installation on this machine? The
link above indicates that if you build NumPy with a different build of
Python than you will run it from, you will get this same error.
Granted, I'm sure there are many ways to get said error, but that was
the most obvious from a five minute search.

Alternatively, if you haven't done so already, you may want to mail
the numpy-discussion list.



From bj_666 at gmx.net  Mon Mar  5 03:55:08 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 05 Mar 2007 09:55:08 +0100
Subject: Building a dictionary from a tuple of variable length
References: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.05.08.55.08.799038@gmx.net>

In <1173084222.565386.250510 at h3g2000cwc.googlegroups.com>, bg_ie wrote:

> Therefore, how do I build the tuple of Falses to reflect the length of
> my t tuple?

In [1]: dict.fromkeys(('one', 'two', 'three'), False)
Out[1]: {'three': False, 'two': False, 'one': False}

Ciao,
	Marc 'BlackJack' Rintsch


From anton.vredegoor at gmail.com  Sat Mar 10 11:04:31 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sat, 10 Mar 2007 17:04:31 +0100
Subject: number generator
In-Reply-To: <1173515984.515050.27400@n33g2000cwc.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
Message-ID: <esukru$1v1$1@news2.zwoll1.ov.home.nl>

Raymond Hettinger wrote:

> To make the solutions equi-probable, a simple approach is to
> recursively enumerate all possibilities and then choose one of them
> with random.choice().

Maybe it is possible to generate the possibilities by an indexing 
function and then use randint to pick one of them. I suppose this is 
like the bricks and bins problem this thread was about:

http://groups.google.nl/group/comp.lang.python/browse_thread/thread/4782b54fa39b3bad

Except that the bins now have at least 1 brick in them (if we have 
positive numbers).

I posted a rather simplistic solution (but working I think) after Steven 
Taschuk made some insightful remarks. I believe it is possible to 
generate the list of numbers directly instead of permuting a list of '0' 
and '1' characters and then finding the positions of the '1' elements.

A.


From shawn.mcgrath at gmail.com  Mon Mar 19 12:40:44 2007
From: shawn.mcgrath at gmail.com (Shawn  McGrath)
Date: 19 Mar 2007 09:40:44 -0700
Subject: Boost Python properties/getter functions for strings
In-Reply-To: <1174320047.732767.101930@e65g2000hsc.googlegroups.com>
References: <1174312916.127830.303550@o5g2000hsb.googlegroups.com>
	<1174320047.732767.101930@e65g2000hsc.googlegroups.com>
Message-ID: <1174322444.663045.82200@d57g2000hsg.googlegroups.com>

On Mar 19, 12:00 pm, "Shawn  McGrath" <shawn.mcgr... at gmail.com> wrote:
> I forgot to mention, getname is defined as:
> const std::string &Entity::getName() const;

After more reading I found the copy_const_reference, and replaced:
 boost::python::return_internal_reference<>());
with:
 
boost::python::return_value_policy<boost::python::copy_const_reference>());

and it fixed my problem.  Is there any downside to using
copy_const_reference over return_internal_reference?

Thanks,
Shawn.



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 04:20:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 06:20:11 -0300
Subject: Descriptor/Decorator challenge
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
	<1173343058.897596.19570@s48g2000cws.googlegroups.com>
Message-ID: <op.tou5jxhkx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 05:37:39 -0300, Michele Simionato  
<michele.simionato at gmail.com> escribi?:

> The code to enable recognition of CurrentClass is short enough to be
> includede here, but I will qualify it as a five star-level hackery:

You forgot the standard disclaimer: "This is extremely dangerous stuff,  
only highly trained professionals can do that! Kids, never try this at  
home!"

-- 
Gabriel Genellina



From dudaraster at gmail.com  Sun Mar  4 05:42:34 2007
From: dudaraster at gmail.com (Aviroce)
Date: Sun, 04 Mar 2007 10:42:34 +0000
Subject: *** CANADIAN ANTI-TERROR LAW HAS BEEN STRUCK DOWN BY ITS
	HONORABLE SUPREME COURT UNANIMOUSLY *** (REPOST)
In-Reply-To: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
References: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
Message-ID: <repost.92102.1172691920.663009.111260@j27g2000cwj.googlegroups.com>

On Feb 24, 11:22 am, stj... at rock.com wrote:
> Canada anti-terror law is struck down>From the Associated Press
>
> February 24, 2007
>
> OTTAWA - Canada's Supreme Court on Friday unanimously declared it
> unconstitutional to detain foreign terrorism suspects indefinitely
> while the courts review their deportation orders.
>
> Five Arab Muslim men have been held for years under the "security
> certificate" program, which the Justice Department has said is a key
> tool in the fight against global terrorism and essential to Canada's
> security.
>
> The court found that the system violated the Charter of Rights and
> Freedoms, Canada's bill of rights. However, it suspended its ruling
> for a year to give Parliament time to rewrite the part of the
> Immigration and Refugee Protection Act that covers the certificate
> process.
>
> The security certificates were challenged by three men from Morocco,
> Syria and Algeria - all alleged by the Canadian Security Intelligence
> Service to have ties to terrorist networks.
>
> The men have spent years in jail while fighting deportation orders.
>
> They risk being labeled terrorists and sent back to their native
> countries, where they say they could face torture.
>
> The court said the treatment of the suspects was a violation of their
> rights.
>
> "The overarching principle of fundamental justice that applies here is
> this: Before the state can detain people for significant periods of
> time, it must accord them a fair judicial process," Chief Justice
> Beverley McLachlin wrote in a ruling for all nine justices.
>
> "The secrecy required by the scheme denies the person named in a
> certificate the opportunity to know the case put against him or her,
> and hence to challenge the government's case," she said.
>
> The challenged law allows sensitive intelligence to be heard behind
> closed doors by a federal judge, with only sketchy summaries given to
> defense attorneys.
>
> The court said the men and their lawyers should have a right to
> respond to the evidence used against them by intelligence agents.
>
> Stockwell Day, the minister of public safety, noted that because the
> ruling does not take effect for a year, the certificates would remain
> in place. He said the government would address the court's ruling "in
> a timely and decisive fashion."
>
> Two of the men are out on bail and remain under house arrest. Three
> others are being held in a federal facility in Ontario.

<<<<<<<<<<<"The court said the treatment of the suspects was a
violation of their
rights.


"The overarching principle of fundamental justice that applies here
is
this: Before the state can detain people for significant periods of
time, it must accord them a fair judicial process," Chief Justice
Beverley McLachlin wrote in a ruling for all nine justices.


"The secrecy required by the scheme denies the person named in a
certificate the opportunity to know the case put against him or her,
and hence to challenge the government's case," she said.
">>>>>>>>>>>>>>>>

THAT IS CALLED PROTECTING CIVIL RIGHTS.  IN THE UNITED STATES OF
AMERICA, WHERE CIVIL RIGHTS ARE PROTECTED BY LAW, FOREIGN SUSPECTS ARE
NOT PROTECTED BY THE GENEVA CONVENTION.  DR. EVIL, V.P. CHENEY, AND
MINI-ME, PRESIDENT BUSH, OPTED TO MODIFY THE GENEVA CONVENTION TO DENY
FOREIGN SUSPECTS DUE PROCESS DEMANDED BY THE CONVENTION.  THIS MEANS
ENEMIES OF THE UNITED STATES OF AMERICA WILL BE DOING JUST THAT TOO.
WHAT IS GOOD FOR THE GOOSE IS GOOD FOR GANDER.







From scott.daniels at acm.org  Fri Mar  9 00:49:50 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 08 Mar 2007 21:49:50 -0800
Subject: TitleCase, camelCase, lowercase
In-Reply-To: <mailman.4839.1173415409.32031.python-list@python.org>
References: <1173379952.901004@iceman.esoterica.pt>	<45f068a2$0$18256$426a74cc@news.free.fr>	<1173393063.705376@jubilee.claranet.pt>	<45f09905$0$28886$426a34cc@news.free.fr>	<1173413376.191416.30990@s48g2000cws.googlegroups.com>	<op.towmn6uwx6zn5v@gabriel2.softlabbsas.com.ar>
	<mailman.4839.1173415409.32031.python-list@python.org>
Message-ID: <12v1ta743535efc@corp.supernews.com>

Ben Finney wrote:
> I prefer to use the term "title case" to refer unambiguously to
> "NameWithSeveralWords", leaving the term "camel case" to describe the
> case with the humps only in the middle :-)

The names "TitleCase" and "camelCase" might suffice here.

-- 
--Scott David Daniels
scott.daniels at acm.org


From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 23 23:43:34 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 24 Mar 2007 14:43:34 +1100
Subject: Multi-line strings with formatting
References: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>
	<1174669850.3450.40.camel@dot.uniqsys.com>
	<mailman.5524.1174674566.32031.python-list@python.org>
	<1174703993.715410.173780@e65g2000hsc.googlegroups.com>
Message-ID: <pan.2007.03.24.03.43.27.229103@REMOVE.THIS.cybersource.com.au>

On Fri, 23 Mar 2007 19:39:53 -0700, Paul McGuire wrote:

> (and I'm glad I'm not the only one who uses 'l' for a scratch list
> variable...)

Yes, and come the revolution, every last one of you will be down the salt
mines.

I don't mind using capital L as a variable, but l looks too much like I
and 1 in most typefaces. Capital O is another nasty one. I also try to
avoid using a as a variable name, because a is a definite article
in English (like "the") and that makes it difficult to write grammatical
sentences about what you're doing.


-- 
Steven.



From aleax at mac.com  Thu Mar 15 01:38:39 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 14 Mar 2007 22:38:39 -0700
Subject: Python books?
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
	<mailman.4942.1173623618.32031.python-list@python.org>
	<et9n5u$q48$1@panix3.panix.com>
	<1173906223.048740.18050@b75g2000hsg.googlegroups.com>
Message-ID: <1huzl72.z09y4u1xt7lpsN%aleax@mac.com>

BartlebyScrivener <rpdooling at gmail.com> wrote:

> On Mar 14, 3:50 pm, a... at pythoncraft.com (Aahz) wrote:
> 
> > Some people prefer shorter books -- Python for Dummies (for new
> > programmers) and Python in a Nutshell (for experienced programmers) both
> > try to give a thorough survey of Python while keeping the book easy to
> > carry.

Not for me to comment about my own books, but I can second your
recommendation for your "for Dummies" for beginners.

> And other people like lots of examples and code organized around
> practical projects a person might like to accomplish using Python. The
> Python Cookbook 2nd edition is great for this, and Martelli et al are
> great writers, as well as great programmers.

If you like _substantial_ examples, rather than the simple/short ones
typically used in manageable-sized books, Hetland's "Practical Python"
was also a great buy (I believe it's now been replaced by "Beginning
Python" by the same author, but unfortunately I haven't seen that one).

In general I dislike books that try to teach a language (or other
technology) via "substantial examples", because the issues with the
examples may obscure those with the language or technology; e.g.,
Stroustrup tries that route in "The C++ Programming Language", as Lutz
does in "Programming Python", and to my taste the results are inferior.

However, at least in "Practical Python" (can't speak for "Beginning
Python"), Hetland managed to pull it off -- perhaps by placing the
substantial programs he develops as successive examples in a clever
sequence, so that at each step he's not dealing with many diverse new
issues but just manageably few of them.


Alex


From m_tayseer82 at yahoo.com  Sun Mar 18 14:07:06 2007
From: m_tayseer82 at yahoo.com (Mohammad Tayseer)
Date: Sun, 18 Mar 2007 11:07:06 -0700 (PDT)
Subject: Eureka moments in Python
In-Reply-To: <+tk*0oRFr@news.chiark.greenend.org.uk>
Message-ID: <548554.50972.qm@web31115.mail.mud.yahoo.com>


> I'd be interested in hearing people's stories of Eureka moments 
> in Python, moments where you suddenly realise that some task 
> which seemed like it would be hard work was easy with Python.


I had a project in the faculty where we were supposed to implement a compiler for a very simple language (no functions, etc).

I was responsible for implementing the compiler itself & another colleage was responsible for making an editor for the language - a bonus feature. I was still learning Python & my colleage only heard about it. I implemented the language completely within 4 days. My colleage learnt Python & Tkinter and made a text editor with syntax highlighting & auto-indentation in 3 days. We implemented all the bonus features while other groups was still fighting with lex & yacc just to get it to *run* right. We were the highest ranked group :)

The next year, the teaching assistant refused that any project be done in Python because it is so easy :(

Part of the productivity boos came from pyggy, a very simple yet powerful parser generator that made writing the compiler clear as exactly as our course note said :)


Mohammad Tayseer
http://spellcoder.com/blogs/tayseer

 
---------------------------------
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From steve at holdenweb.com  Tue Mar 13 20:13:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 13 Mar 2007 20:13:58 -0400
Subject: help!! *extra* tricky web page to extract data from...
In-Reply-To: <7xy7m0eny5.fsf@ruckus.brouhaha.com>
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>	<55ojorF26c25jU1@mid.uni-berlin.de>	<55oli1F25u2dmU1@mid.uni-berlin.de>	<7xmz2gbx6r.fsf@ruckus.brouhaha.com>	<55omooF25ll0vU1@mid.uni-berlin.de>	<7x1wjskbs7.fsf@ruckus.brouhaha.com>	<55op6uF24n2biU1@mid.uni-berlin.de>
	<7xy7m0eny5.fsf@ruckus.brouhaha.com>
Message-ID: <et7er3$hag$1@sea.gmane.org>

Paul Rubin wrote:
> "Diez B. Roggisch" <deets at nospam.web.de> writes:
>> Obviously this wouldn't really help, as you can't predict what a
>> website actually wants which events, in possibly which
>> order. Especially if the site does not _want_ to be scrapable- think
>> of a simple "click on the images in the order of the numbers shown on
>> them" captcha.
> 
> Sure, but most sites don't go to such lengths, and even captchas can
> be defeated if you're trying to scrape a specific site and are willing
> to spend effort on the particular captcha generator that it uses.
> Plus there is always www.captchasolver.com (!).
> 
I especially like the rems and conditions they ask you to acknowledge if 
you want to sign up as a worker:

   http://www.captchasolver.com/join/worker#

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From bborcic at gmail.com  Wed Mar 21 06:31:06 2007
From: bborcic at gmail.com (Boris Borcic)
Date: Wed, 21 Mar 2007 11:31:06 +0100
Subject: How to calculate a file of equations in python
In-Reply-To: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>
References: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>
Message-ID: <etr1ii$o06$1@sea.gmane.org>

r=''
for line in file : r = str(eval(r+line))

John wrote:
> Hi,
> I have a text file which contains math expression, like this
> 134
> +234
> +234
> 
> (i.e. an operation (e.g. '+) and then a number and then a new line).
> 
> Can you please tell me what is the easiest way to calculate that file?
> for example the above example should be = 134 + 234 + 234 = 602.
> 
> Thank you.
> 



From nospam at nospam.com  Wed Mar 28 11:13:38 2007
From: nospam at nospam.com (Mark T)
Date: Wed, 28 Mar 2007 08:13:38 -0700
Subject: Python automatic testing: mocking an imported module?
References: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
Message-ID: <e_SdnZlWHIaIG5fbnZ2dnUVZ_qidnZ2d@comcast.com>


"Silfheed" <silfheed at gmail.com> wrote in message 
news:1175033934.795913.292030 at l77g2000hsb.googlegroups.com...
> Heyas
>
> So we have the following situation: we have a testee.py that we want
> to automatically test out and verifiy that it is worthy of being
> deployed.  We want our tester.py to test the code for testee.py
> without changing the code for testee.py.  testee.py has a module in it
> that we want to mock in some tests and in others use the real module.
>
> /foo.py:  (real module)
> class bar:
>   def __init__(self):
>        "I am real"
>
> /foo_fake/foo.py: (fake module)
> class bar:
>   def ___init__(self):
>        "I am a banana"
>
> /testee.py:
> import foo
> foo.bar()
>
> /tester.py:
> from foo_fake import foo
>   foo.bar()    # prints I am a banana
>   testee.py  # also prints I am a banana
> import foo
>   foo.bar()   # prints I am real
>   testee.py # also prints I am real
>
>
> This isnt working as we would like, does anyone have any tips  on how
> to get something like this working?
>

If you add the foo_fake directory to the front of sys.path, "import foo" 
will import the foo.py in foo_fake directory before the one in the local 
directory.

# unverified code
import sys
sys.path.append(0,'foo_fake') # add foo_fake to front of path
import foo
foo.bar()
execfile('testee.py')
sys.path.pop(0) # remove foo_fake
reload(foo)
foo.bar()
execfile('testee.py')

-Mark 



From aleax at mac.com  Thu Mar 29 03:57:03 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 00:57:03 -0700
Subject: gmpy floating point exception
References: <eufdde$ekb$1@aioe.org>
Message-ID: <1hvpp4y.albgc51fr3fstN%aleax@mac.com>

Martin Manns <mmanns at gmx.net> wrote:

> Hi,
> 
> I am experiencing some trouble with gmpy v1.01.
> Multiplying an mpq with inf results in a floating point exception that
> exits python. Has this already been fixed in newer gmpy versions? 

No, I can reproduce the problem (on a Mac with an Intel CPU) with the
current version, 1.02.  I will have no time to work for a fix until (I
hope) next week, though (spending a long weekend hitch-hiking).

> BTW.
> 1) What is the best way to test for inf regardless of type?

No, 'inf' is in fact not portable among different builds of Python for
different CPUs, in general.

> 2) Is there any inf type around with
> a + inf == inf
> inf > a (as long as a != inf)
> etc.
> that works with any other type?

You mean something like:

class inf(object):
    def __radd__(self, other): return self
    def __gt__(self, other): return self is not other
    # etc
inf = inf()

...?


Alex


From ptmcg at austin.rr.com  Fri Mar 30 17:41:57 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 30 Mar 2007 14:41:57 -0700
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <mailman.5793.1175281775.32031.python-list@python.org>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
	<mailman.5793.1175281775.32031.python-list@python.org>
Message-ID: <1175290917.509860.224250@o5g2000hsb.googlegroups.com>

On Mar 30, 2:09 pm, Michael Bentley <mich... at jedimindworks.com> wrote:
> On Mar 30, 2007, at 10:38 AM, kevinliu23 wrote:
>
>
>
>
>
> > I want to be able to insert a '-' character in front of all numeric
> > values in a string. I want to insert the '-' character to use in
> > conjunction with the getopt.getopt() function.
>
> > Rigt now, I'm implementing a menu system where users will be able to
> > select a set of options like "2a 3ab" which corresponds to menu
> > choices. However, with getopt.getopt(), it'll only return what I want
> > if I input -2a -3ab as my string. I don't want the user have to insert
> > a '-' character in front of all their choices, so I was thinking of
> > accepting the string input first, then adding in the '-' character
> > myself.
>
> > So my qusetion is, how do I change:
>
> > "2a 3ab" into "-2a -3ab".
>
> Will the first character always be a digit?
>
> for i in yourstring.split():
>         if i[0].isdigit():
>                 yourstring = yourstring.replace(i, '-%s' % (i,))
>
> Or are these hex numbers?- Hide quoted text -
>
> - Show quoted text -

Your replace strategy is risky.  If:

yourstring = "1ab 2bc 3de 11ab"

it will convert to

-1ab -2bc -3de 1-1ab

-- Paul




From xiong.xu.cn at gmail.com  Sat Mar 17 07:09:16 2007
From: xiong.xu.cn at gmail.com (imx)
Date: 17 Mar 2007 04:09:16 -0700
Subject: cannot start IDLE in WinXP
Message-ID: <1174129756.325715.22280@e1g2000hsg.googlegroups.com>

Hi,

Enviroment: WinXP sp2, python 2.5
problem: click IDLE using shorcut menu or run phthonw.exe directly,
nothing happen! But running python.exe from the command line is fine.

I searched this issue on the net and this forum and tried some
suggestions but with no luck.

Any ideas?

Thanks in advance,
Xiong



From knipknap at gmail.com  Wed Mar 14 16:43:36 2007
From: knipknap at gmail.com (Samuel)
Date: 14 Mar 2007 13:43:36 -0700
Subject: Converting a list to a dictionary
In-Reply-To: <1173904326.037621.10390@n76g2000hsh.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
	<45f8583d$0$10407$426a34cc@news.free.fr>
	<1173904326.037621.10390@n76g2000hsh.googlegroups.com>
Message-ID: <1173905016.752156.248140@n59g2000hsh.googlegroups.com>

On Mar 14, 9:32 pm, "Drew" <olso... at gmail.com> wrote:
> I'm using Python2.5 and it seems that this only gives me a hash with
> the first id and first record. Am I doing something wrong?

Try this instead:

>>> class Person():

...     def __init__(self):
...             self.id = 5
...
>>> mylist = []
>>> for i in range(100):

...     p = Person()
...     p.id = i
...     mylist.append(p)
...
>>> mydict = dict((r.id,r) for r in mylist)
>>> mydict

What this does is it maps the id to the object. In your case, you only
have one id.

-Samuel



From steve at holdenweb.com  Sat Mar 17 06:29:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 17 Mar 2007 06:29:43 -0400
Subject: File extension
In-Reply-To: <cf14220703161559s1d106d03gd02bac4c0d695506@mail.gmail.com>
References: <cf14220703161559s1d106d03gd02bac4c0d695506@mail.gmail.com>
Message-ID: <45FBC317.2020204@holdenweb.com>

Anil Kumar wrote:
> Hi,
>  
> Can Python Script can have different extensions like .sh etc.... Or Is 
> .py is mandatory to be present as the extension for the Python Script.
>  
The interpreter itself doesn't really care. The issues you are hotting 
are due to operating system. and command shell differences.

> We have an application where the script was initially written in shell 
> script with extension .sh. Now we are migrating this script to be run in 
> both Unix and Windows, so using Python for migration.
>  
Good for you!

> I have created a new Python Script porting all the changes in shell 
> script and it is working fine in Unix/Linux operating system. Later I 
> changed the extension of the file from .py to .sh, even then it worked.
>  
The Unix command interpretation mechanism uses PATH as a list of 
directories to search for the named command file (the first word of the 
expanded command line). It then looks for the magic string "#!" at the 
start of the executable file and, if it finds that string, it passes the 
file to the interpreter named in the rest of the line for execution as a 
program.

Your Python files probably begin with something like

#!/usr/bin/python

or

#!/usr/bin/env python

> But when I try a python script with extension .sh in windows, the file 
> is not getting recognized by the Python interpreter. Is this supported? 
> Or is there any way we can achieve the same?
>  
In Windows, alas, the mechanism is less versatile. The command 
interpreter uses an environment variable called PATHEXT to decide which 
extensions to check when it sees a command that it can't find directly. 
For example, my PATHEXT variable is currently

PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH

(you'll observe I have given up on the PATHEXT mechanism - it's too much 
of a pain in the butt for me, so I just code explicit calls to the 
python interpreter).

It looks on the PATH for a file with the given name and each extension, 
and when it finds one it then runs the interpreter registered for that 
type of file.

> The reason I am trying to change the extension is, it reduces lot of 
> porting changes. No need to go to each of our file which were 
> referencing .sh file before and change it to .py.
>  
> Any Help would be greatly Appreciated.
>  
You could cheat ... if you register the .SH extension as "to be handled 
by the python interpreter" and then add .SH to PATHEXT this should work 
under Windows.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From stevena at neosynapse.net  Wed Mar 21 14:51:58 2007
From: stevena at neosynapse.net (Steven D. Arnold)
Date: Wed, 21 Mar 2007 14:51:58 -0400
Subject: parsing combination strings
In-Reply-To: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
Message-ID: <C802B3C6-FF0D-4AFE-B0B5-4CC431FDB353@neosynapse.net>

On Mar 21, 2007, at 2:42 PM, PKKR wrote:
> I need a fast and efficient way to parse a combination string(digits +
> chars)
>
> ex: s = "12ABA" or "1ACD" or "123CSD" etc
>
> I want to parse the the above string such that i can grab only the
> first digits and ignore the rest of the chacters,

A regex leaps to mind.....have you investigated the "re" module?

 >>> import re
 >>> re.match(r'(\d+)', '123abc').group(1)
'123'

steven



From fredrik at pythonware.com  Mon Mar  5 03:55:01 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 5 Mar 2007 09:55:01 +0100
Subject: How use XML parsing tools on this one specific URL?
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
	<17899.1902.949251.452086@montanaro.dyndns.org>
Message-ID: <esglt5$2lp$1@sea.gmane.org>

skip at pobox.com wrote:
>
>    Chris> http://moneycentral.msn.com/companyreport?Symbol=BBBY
>
>    Chris> I can't validate it and xml.minidom.dom.parseString won't work on
>    Chris> it.
>
>    Chris> If this was just some teenager's web site I'd move on.  Is there
>    Chris> any hope avoiding regular expression hacks to extract the data
>    Chris> from this page?
>
> Tidy it perhaps or use BeautifulSoup?  ElementTree can use tidy if it's
> available.

ElementTree can also use BeautifulSoup:

    http://effbot.org/zone/element-soup.htm

as noted on that page, tidy is a bit too picky for this kind of use; it's better suited
for "normalizing" HTML that you're producing yourself than for parsing arbitrary
HTML.

</F> 





From gregor at hostgis.com  Wed Mar  7 05:25:56 2007
From: gregor at hostgis.com (Gregor Mosheh)
Date: Wed, 7 Mar 2007 03:25:56 -0700 (MST)
Subject: How to build a Windows service using win32?
Message-ID: <3486.168.103.93.50.1173263156.squirrel@maps.hostgis.com>

I'm trying to write a Win32 service. The following is straight from Python
Programming on Win32 and it doesn't work. Is that book out of date; is
there a new way to do services? I searched Google for hours trying to find
any other method, and have been beating on this one for 5 more hours.

The present error is:

C:\Tester>python tester.py debug
Debugging service Tester - press Ctrl+C to stop.
Error 0xC0000004 - Python could not import the service's module

<type 'exceptions.ImportError'>: No module named service


The code is:

import win32serviceutil, win32service, win32event

class Service(win32serviceutil.ServiceFramework):
    _svc_name_         = "EDMS-to-CG"
    _svc_display_name_ = "EDMS-to-CG Syncer"
    _svc_description_  = "Uploaded the EDMS database to Cartograph"

    def __init__(self, args):
        win32serviceutil.ServiceFramework.__init__(self, args)
        self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)

    def SvcStop(self):
        self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
        win32event.SetEvent(self.hWaitStop)

    def SvcDoRun(self):
        pausetime = 60 * 1000
        while True:
            stopsignal = win32event.WaitForSingleObject(self.hWaitStop,
pausetime)
            if stopsignal == win32event.WAIT_OBJECT_0: break
            self.runOneLoop()

    def runOneLoop(self):
        import servicemanager
        servicemanager.LogInfoMsg('Running')

win32serviceutil.HandleCommandLine(Service)




From goodTweetieBird at hotmail.com  Wed Mar 21 16:52:56 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 13:52:56 -0700
Subject: Printing __doc__
In-Reply-To: <ets4qe$i0i$00$1@news.t-online.com>
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
	<ets4qe$i0i$00$1@news.t-online.com>
Message-ID: <1174510376.417966.110370@e1g2000hsg.googlegroups.com>

On Mar 21, 3:35 pm, Peter Otten <__pete... at web.de> wrote:
> gtb wrote:
> > In a function I can use the statement n =
> > sys._getframe().f_code.co_name to get the name of the current
> > function. Given that I can get the name how can I print the __doc__
> > string? I cant use the following, it will tell me to bugger off as the
> > string has no such attribute.
>
> > def spam(self):
> >     n = sys._getframe().f_code.co_name
> >     print n.__doc__      #Wrong
> >     print __doc__         #No good either
> >     #....
> >>> import sys
> >>> def docstring():
>
> ...     return sys._getframe(1).f_code.co_consts[0]
> ...>>> def foo():
>
> ...     print "My docstring is %r" % docstring()
> ...>>> def bar():
>
> ...     "bar's docstring"
> ...     print "My docstring is %r" % docstring()
> ...>>> foo()
>
> My docstring is None>>> bar()
>
> My docstring is "bar's docstring"
>
> No idea how brittle that might be, though.
>
> Peter

Thanks.

Pardon my ignorance, but brittle?



From claird at lairds.us  Mon Mar 26 11:16:55 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 Mar 2007 15:16:55 +0000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
Message-ID: <7o4ld4-qrv.ln1@lairds.us>

In article <1174918424.125068.176920 at y80g2000hsf.googlegroups.com>,
Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:
			.
			.
			.
>Is there a mac version??
>Thanks
>Chris
>

Yes.

Several, in fact--all available at no charge.  The Python
world is different from what experience with Fortran might
lead you to expect.

I'll be more clear:  Fortran itself is a distinguished
language with many meritorious implementations.  It can be
costly, though, finding the implementation you want/need
for any specific environment.

Python, in contrast, is blessed with a plethora of 
implementations and variations, all of which are available
without licensing fee.  In particular, recent Mac OS X
installations INCLUDE Python--it's already in there!


From mail at timgolden.me.uk  Thu Mar 22 08:30:24 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 22 Mar 2007 12:30:24 +0000
Subject: Python-URL! - weekly Python news and links (Mar 22)
In-Reply-To: <46027530$0$10420$426a74cc@news.free.fr>
References: <etsq3d$jcg$1@lairds.us> <46027530$0$10420$426a74cc@news.free.fr>
Message-ID: <460276E0.8020409@timgolden.me.uk>

Bruno Desthuilliers wrote:
> Cameron Laird a ?crit :
>> This is the first time you've received "Python-URL!" in 2007.  No,
>> that's not the fault of your mail server; we've just been on sabbatical.
>> Now we're back.  
> 
> Great ! I was a bit worried...
> 

Seconded; I've always looked forward to the Python-URL and
I was a bit afeared that it had run out of steam. Good
to see it back... and thanks for keeping it up!

TJG


From stephan.diehl at gmx.net  Fri Mar 30 10:46:23 2007
From: stephan.diehl at gmx.net (Stephan Diehl)
Date: Fri, 30 Mar 2007 16:46:23 +0200
Subject: next python berlin user group meeting / naechstes berliner python
	treffen
Message-ID: <euj7rs$pj7$00$1@news.t-online.com>

time: 3.4., 7pm
place: c-base
info: http://groups.google.de/group/python-berlin


From quentel.pierre at wanadoo.fr  Sun Mar 25 03:03:52 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 25 Mar 2007 00:03:52 -0700
Subject: List comprehension returning subclassed list type?
In-Reply-To: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>
References: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>
Message-ID: <1174806232.810906.219660@n59g2000hsh.googlegroups.com>

On 25 mar, 08:43, "bullockbefriending bard" <kinch1... at gmail.com>
wrote:
> Given:
>
> class Z(object):
>     various defs, etc.
>
> class ZList(list):
>     various defs, etc.
>
> i would like to be able to replace
>
> z_list = ZList()
> for y in list_of_objects_of_class_Y:
>     z_list.append(y)
>
> with something like this:
>
> z_list = [Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y]
>
> Of course this just gives me a plain list and no access to the
> methodsof z_list. I could, of course go and write a static method in
> ZList which takes a plain list of Z objects and returns a ZList.
>
> Anyway, my question is whether or not this can be done more elegantly
> via list comprehension?

Hello,

A list comprehension will give you a list. But you can use a generator
expression :

z_list = ZList(Z(y.var1, y.var2,..)
    for y in list_of_objects_of_class_Y)

Regards,
Pierre



From aahz at pythoncraft.com  Sun Mar 18 19:33:56 2007
From: aahz at pythoncraft.com (Aahz)
Date: 18 Mar 2007 16:33:56 -0700
Subject: Grep Equivalent for Python
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<1huzlrm.1scmekr1val8sbN%aleax@mac.com>
	<1174255846.721961.108370@e1g2000hsg.googlegroups.com>
Message-ID: <etki94$7qq$1@panix3.panix.com>

In article <1174255846.721961.108370 at e1g2000hsg.googlegroups.com>,
tereglow <tom.rectenwald at eglow.net> wrote:
>On Mar 15, 1:47 am, a... at mac.com (Alex Martelli) wrote:
>> tereglow <tom.rectenw... at eglow.net> wrote:
>>>
>>>grep^MemTotal /proc/meminfo | awk '{print $2}'
>>
>> If you would indeed do that, maybe it's also worth learning something
>> more about the capabilities of your "existing" tools, since
>>
>>   awk '/^MemTotal/ {print $2}' /proc/meminfo
>>
>> is a more compact and faster way to perform exactly the same task.
>>
>> (You already received a ton of good responses about doing this in
>> Python, but the "pipegrepinto awk instead of USING awk properly in the
>> first place!" issue has been a pet peeve of mine for almost 30 years
>> now, and you know what they say about old dogs + new tricks!-).
>
>I had no idea you could do that.  Thanks for the tip, I need to start
>reading that awk/sed book collecting dust on my shelf!

Your other option is to completely abandon awk/sed.  I started writing
stuff like this in Turbo Pascal back in the early 80s because there
simply wasn't anything like awk/sed available for CP/M.  In the 90s, when
I needed to do similar things, I used Perl.  Now I use Python.

>From my POV, there is really no reason to learn the advanced shell
utilities.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From rowen at cesmail.net  Fri Mar  2 16:09:09 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Fri, 02 Mar 2007 13:09:09 -0800
Subject: Converting a c array to python list
References: <es66m4$cnr$1@inews.gazeta.pl>
Message-ID: <rowen-9DEBB0.13090902032007@gnus01.u.washington.edu>

In article <es66m4$cnr$1 at inews.gazeta.pl>,
 zefciu <zefirek at Speacock.Pau.Apoznan.Mpl> wrote:

> Hi!
> 
> I want to embed a function in my python application, that creates a
> two-dimensional array of integers and passes it as a list (preferably a
> list of lists, but that is not necessary, as the python function knows
> the dimensions of this array).  As I read the reference, I see, that I
> must first initialize a list object and then item-by-item put the values
> to the list.  Is there any faster way to do it?  And is it worth to
> implement?  The same problem is resolved in the current version by
> calling a smaller c function (that counts just one element of the array)
> many times.  Will it add much performance to the process?

My first thought is to use the numpy library since it is good at quickly 
creating large arrays (of any dimension) and you can easily get the data 
out as a list if you really need that (but are you sure you need that? 
You may be able to just use the numpy array directly).

It might help to have a clearer idea of why you want to do this. 

-- Russell

P.S. numarray or Numeric would also do the job. They are older, 
deprecated numeric libraries. numpy is recommended for new code.


From bignose+hates-spam at benfinney.id.au  Thu Mar  8 16:03:51 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 Mar 2007 08:03:51 +1100
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
Message-ID: <874povzbuw.fsf@benfinney.id.au>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:

> Alan Isaac wrote:
> > As a tab user, I want the tabs warning turned off.
>
> Advice: Don't.

Agreed. Sticking to spaces for indentation avoids the ambiguity of
interpretation that ASCII TAB characters are subject to. In addition,
PEP 8 (which many people consider a strong suggestion for a style
guide for all Python code) recommends four space characters for
indentation.

> IIRC it's planned in future Python versions that TABs aren't
> supported for indentation.

I've not seen such plans, can you support that?

If you're thinking of this post from Guido, please note the date it
was made:

    <URL:http://www.artima.com/weblogs/viewpost.jsp?thread=101968>

-- 
 \           "Dvorak users of the world flgkd!"  -- Kirsten Chevalier, |
  `\                                                rec.humor.oracle.d |
_o__)                                                                  |
Ben Finney



From ebgssth at gmail.com  Sat Mar  3 04:45:28 2007
From: ebgssth at gmail.com (js )
Date: Sat, 3 Mar 2007 18:45:28 +0900
Subject: print a ... z, A ... Z, "\n"' in Python
In-Reply-To: <a23effaf0703030142t42d5bb51jc0fe761e51294f25@mail.gmail.com>
References: <mailman.4623.1172909667.32031.python-list@python.org>
	<1172913109.184004.132680@30g2000cwc.googlegroups.com>
	<a23effaf0703030142t42d5bb51jc0fe761e51294f25@mail.gmail.com>
Message-ID: <a23effaf0703030145p7943faabv7560cdfb0fb7cb24@mail.gmail.com>

> But note that you return the last item of the range too, and that goes
> against the semantic of the usual Python range/xrange, so you may want
> to call this function with another name.

That makes sense. 100% agree with you.

> Maybe there are better ways to solve this problem. Maybe a way to
> generate (closed?) char ranges can be added to the Python standard
> lib.

Maybe we don't want char range If string constants would be rich enough.


From rhc28 at cornell.edu  Mon Mar 19 17:11:15 2007
From: rhc28 at cornell.edu (Rob Clewley)
Date: Mon, 19 Mar 2007 17:11:15 -0400
Subject: urgent - Matplolib with IDLE!
In-Reply-To: <26f4c9e60703191308j55287087ydc12c24656b4df6b@mail.gmail.com>
References: <26f4c9e60703191308j55287087ydc12c24656b4df6b@mail.gmail.com>
Message-ID: <a749952d0703191411u1ce36ca4lbb4ad50d705ab074@mail.gmail.com>

Dear Ana,

I have the same problem with a similar setup (except Python 2.4.3) and
have tried the same solutions (BTW those steps really did used to work
on my machine using Python 2.3.5). In the short term you could either
try IPython (a proper solution to this problem, which returns me to
the prompt just fine after closing the figure) or try the following
"quick and dirty fix" with IDLE:

1) If your script does stuff other than define classes and functions,
put in a command that prevents it getting to the calculations (e.g.
insert a "1/0" line) or, for instance, turn all your calculations into
function calls that you can easily comment out (temporarily). Run your
script using F5 so that you just get the prompt.
3) Create an empty figure using pylab.figure() or whatever.
2) Close the figure and the IDLE console (command prompt window) that
opened when you ran the script (you have to say Yes when it asks about
killing a python process).
3) This leaves an orphaned python process which you have to clean up
later using your Task Manager, but ...
4) you can now continue to interact with any new IDLE console created
in the current session when you bring up new figures. i.e. uncomment
the parts of your script that actually do stuff and run it again.

At least that's a quick fix that's working for me while I await a
better answer too... Perhaps this hack will outrage someone's
sensibilities sufficiently that we'll hear of a better IDLE solution.

HTH,
Rob


From mikelem at iastate.edu  Fri Mar  2 20:27:15 2007
From: mikelem at iastate.edu (Jeff Groves)
Date: Fri, 2 Mar 2007 19:27:15 -0600 (CST)
Subject: "unknown encoding: string-escape" in frozen Python
Message-ID: <152719221075600@webmail.iastate.edu>

I'm using FreezePython on a Python program that uses wxPython and subprocess.
The result almost works, but it always hits this bug:

  File "velauncher.py", line 847, in Launch
  File "python/velLaunchCode.py", line 61, in __init__
  File "python/velLaunchCode.py", line 143, in Unix
  File "python/subprocess.py", line 599, in __init__
  File "python/subprocess.py", line 1031, in _execute_child
  File "/usr/lib/python2.3/pickle.py", line 1394, in loads
    return Unpickler(file).load()
  File "/usr/lib/python2.3/pickle.py", line 872, in load
    dispatch[key](self)
  File "/usr/lib/python2.3/pickle.py", line 985, in load_string
    self.append(rep.decode("string-escape"))
LookupError: unknown encoding: string-escape

I tried adding --include-modules=encodings to the arguments, but I'm still
getting the string-escape error. How can I include the encoding in the freeze?

I'm using Python2.3 and the downloadable version of subprocess.py for Python2.3
on Redhat.

-Jeff Groves




From laurent.pointal at limsi.fr  Mon Mar 19 08:52:56 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 19 Mar 2007 13:52:56 +0100
Subject: XML based programming language
In-Reply-To: <1174307748.936567.191440@e1g2000hsg.googlegroups.com>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
Message-ID: <etm12l$qlh$1@news2.u-psud.fr>

stefaan a ?crit :
>> Elementtree isn't lex. You are comparing apples and oranges here. Lex
>> tokenizes, yacc creates trees. Both of is covered in XML itself - it's
>> defined the tokenization and parsing, built into elementtree. So,
>> elemnttree is lex _and_ yacc for XML. And if your language is written in
>> XML, that's all there is to it.
> 
> I see your point. But yacc does more: I specify a grammar, and yacc
> will
> reject input files that do not conform to the grammar.
> Elementtree OTOH will happily accept any valid XML file, all checking
> has to
> implememented manually by me.
> 
> Best regards,
> Stefaan.
> 

For an XML represented programming language, isn't the DTD (or other XML
  definition format) your grammar?

IE. Just use an XML validator tool and you dont need to write checking.
DTDs may be not enough, see other definitions tools.



From cfbolz at gmx.de  Wed Mar 28 12:04:30 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 18:04:30 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <6AFD137D-BE66-4BD6-84C5-0D473FCC3377@stackless.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>	<1175041489.368797.281750@d57g2000hsg.googlegroups.com>	<460A297A.5030605@gmx.de>
	<6AFD137D-BE66-4BD6-84C5-0D473FCC3377@stackless.com>
Message-ID: <460A920E.504@gmx.de>

Hi Christian!

Christian Tismer wrote:
> On 28.03.2007, at 10:38, Carl Friedrich Bolz wrote:
> 
>> Brain error on our side: the gc_pypy.dll is the dll of the Boehm  
>> garbage
>> collector, which you would need to compile yourself (which makes
>> precompiled binaries a bit useless :-) ). We updated the zip file,  
>> would
>> you mind checking whether it works better now?
> 
> Why can't we provide a pre-compiled binary?
> Is this a license issue?

We can. That's exactly what we did.

Cheers,

Carl Friedrich Bolz



From usenet at elehack.net  Thu Mar 22 20:53:34 2007
From: usenet at elehack.net (Michael Ekstrand)
Date: Fri, 23 Mar 2007 01:53:34 +0100 (CET)
Subject: how can I invoke a Java code?
References: <1174610940.971724.206900@l75g2000hse.googlegroups.com>
Message-ID: <etv8ee$6vd$1@aioe.org>

On Thu, 22 Mar 2007 17:49:01 -0700, momobear wrote:

> A friend of my write a Java program, and I want use it in my python
> program as a module. I searched the topic in Google and find maybe the
> better way is use GCJ to compile it. Is there any other way for me? the
> simple and speediness choice the better. thanks.

If you want to run the Java program as a separate process, you can run
"java -jar TheProgram.jar".

If you're wanting to interact with the code, your best option may be
Jython, an implementation of Python in Java.

- Michael


From nobody at invalid.com  Tue Mar 27 14:11:01 2007
From: nobody at invalid.com (Erik Johnson)
Date: Tue, 27 Mar 2007 12:11:01 -0600
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916449.171929.138950@n76g2000hsh.googlegroups.com>
	<pan.2007.03.26.22.17.16.194451@REMOVE.THIS.cybersource.com.au>
Message-ID: <46095e24$1@nntp.zianet.com>


"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> wrote in message
news:pan.2007.03.26.22.17.16.194451 at REMOVE.THIS.cybersource.com.au...

> Sheesh. Do Java developers go around telling everybody that Java is an
> interpreted language? I don't think so.
>
> What do you think the "c" in ".pyc" files stands for? "Cheese"?

On the contrary... Sun is very careful to make sure you understand that Java
is *COMPILED*!
Remember, remember, always remember: Java is COMPILED! See that: the java
"compiler": javac.  You have to call it explicitly when you build your Java
software so that it compiles Java source code (that way Java executes really
fast)!! (And don't forget, Java source is *compiled*, just like C++.)

What's a JVM? Why would you need one since Java is *compiled*, remember?

    But seriously... I'm not a language or architecture guru.  Is there any
real difference between a JVM and an interpreter? I mean, I have some
general feel that bytecode is a lower-level, more direct and more efficient
thing to be interpreting that Java or Python source, but at the bottom
level, you are still running an interpreter which is going to be
(significantly?) more inefficient than executing native machine instructions
directly on the CPU, right?

    Why is Python able to automatically compile source into bytecode on the
fly (when needed) but Java still forces you to do so explicitly?

    I don't mean to bash Java - I think it has it's place as well, but I
mean to note that Java is very carefully marketed whereas Python's image is
not managed by a major, international corporation.




From wgwigw at gmail.com  Mon Mar 19 04:35:00 2007
From: wgwigw at gmail.com (momobear)
Date: 19 Mar 2007 01:35:00 -0700
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <566vcfF27jlu4U1@mid.uni-berlin.de>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
Message-ID: <1174293300.034362.282460@l75g2000hse.googlegroups.com>

On Mar 19, 4:19 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> momobear schrieb:
>
>
>
> > hi, I am puzzled about how to determine whether an object is
> > initilized in one class, anyone could give me any instructions?
> > here is an example code:
>
> > class coffee:
> >          def  boil(self):
> >                self.temp = 80
>
> > a = coffer()
> > if a.temp > 60:
> >      print "it's boiled"
>
> > in C++ language we must initilized a variable first, so there is no
> > such problem, but in python if we don't invoke a.boil(), we will not
> > get self.temp to be initilized, any way to determine if it's initilzed
> > before self.temp be used.
>
> You want boil to be called __init__, which is python's constructor name.
> Then it will be called in a statement like
>
> a = coffee()
>
> automatically.
>
> Diez

sorry, I should add more code to implement my ideas.
class coffee:
         def __init__(self):
              '''
              do something here
              '''
         def  boil(self):
               self.temp = 80

a = coffer()
if a.temp > 60:
     print "it's boiled"



From aahz at pythoncraft.com  Thu Mar  8 11:29:41 2007
From: aahz at pythoncraft.com (Aahz)
Date: 8 Mar 2007 08:29:41 -0800
Subject: thread safe SMTP module
References: <mailman.4616.1172878783.32031.python-list@python.org>
	<mailman.4644.1172997256.32031.python-list@python.org>
	<esf50h$9n6$1@panix3.panix.com>
	<mailman.4657.1173039582.32031.python-list@python.org>
Message-ID: <espdll$fa9$1@panix3.panix.com>

In article <mailman.4657.1173039582.32031.python-list at python.org>,
Gordon Messmer  <yinyang at eburg.com> wrote:
>Aahz wrote:
>> 
>> Assuming you have correctly tracked down the problem area, I would call
>> that a thread bug in Python.  But my experience is that you simply have
>> run into a problem with the socket.  I would suggest that using
>> socket.setdefaulttimeout() would work just as well.
>
>I believe that solution, also would not work.  This note is included in 
>the socket documentation, regarding "timeout mode":
>
>http://docs.python.org/lib/socket-objects.html
>"A consequence of this is that file objects returned by the makefile() 
>method must only be used when the socket is in blocking mode; in timeout 
>or non-blocking mode file operations that cannot be completed 
>immediately will fail."
>
>smtplib.SMTP uses file objects when reading SMTP responses.  If I used 
>setdefaulttimeout(), then the socket would be in timeout mode and the 
>above note would be applicable.

Hrm.  At this point, I would suggest taking discussion to python-dev; it
has been too long since I looked closely at thread/socket behavior.

>I am not at all above calling python's behavior a bug, except that it 
>seemed like a known behavior given the note in the thread documentation 
>regarding built-in functions that block on I/O.

No, at this point I think this is neither bug nor about thread blocking
on I/O.  I think it's about sockets dying and the inability of sockets in
blocking mode to recover.  I have seen this kind of behavior in
single-threaded systems.  But it really needs someone who knows more than
I do, and I think the first step here is to go ahead and file a bug
report for tracking purposes.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From bdesth.quelquechose at free.quelquepart.fr  Sun Mar 11 13:36:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 11 Mar 2007 18:36:02 +0100
Subject: Best place for a function?
In-Reply-To: <mailman.4868.1173469085.32031.python-list@python.org>
References: <f1aa6d810703071427g4735f009m579b807aa261fe49@mail.gmail.com>
	<mailman.4868.1173469085.32031.python-list@python.org>
Message-ID: <45f435db$0$16855$426a74cc@news.free.fr>

Inyeol Lee a ?crit :
> On Wed, Mar 07, 2007 at 05:27:04PM -0500, Sergio Correia wrote:
> 
>>I'm writing a class, where one of the methods is kinda complex. The
>>method uses a function which I know for certain will not be used
>>anywhere else. This function does not require anything from self, only
>>the args passed by the method.
>>
>>Where should I put the function?
> 
> 
> Use staticmethod. It's a normal function with class namespace.

What do you think the OP will gain from making a simple helper function 
a staticmethod ? Apart from extra lookup time ?


From stargaming at gmail.com  Sun Mar 11 15:04:50 2007
From: stargaming at gmail.com (Stargaming)
Date: Sun, 11 Mar 2007 20:04:50 +0100
Subject: any better code to initalize a list of lists?
In-Reply-To: <LkYIh.2513$Qw.314@newssvr29.news.prodigy.net>
References: <esqc9r$cn09$1@netnews.upenn.edu>
	<LkYIh.2513$Qw.314@newssvr29.news.prodigy.net>
Message-ID: <et1jsj$16er$1@ulysses.news.tiscali.de>

Donald Fredkin schrieb:
> John wrote:
> 
> 
>>For my code of radix sort, I need to initialize 256 buckets. My code
>>looks a little clumsy:
>>
>>radix=[[]]
>>for i in range(255):
>>   radix.append([])
>>
>>any better code to initalize this list?
> 
> 
> radix = [[[]]*256][0]
> 

 >>> x = [[[]]*256][0]
 >>> x
[[], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], [], 
[], [], ...
 >>> x[0].append(1)
 >>> x
[[1], [1], [1], [1], [1], [1], [1], [1], [1], [1], [1], [1], [1], [1], 
[1], [1], ...

Nice one.


From facundo at taniquetil.com.ar  Wed Mar  7 11:08:44 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 7 Mar 2007 16:08:44 +0000 (UTC)
Subject: Generator expression parenthesis mixed with function call ones
References: <esmn5q$5ni$1@news2.u-psud.fr>
Message-ID: <esmo28$l6a$1@sea.gmane.org>

Laurent Pointal wrote:


>>>> f(4,i for i in range(10))
>   File "<stdin>", line 1
> SyntaxError: invalid syntax
>
>
> Why does Python allow generator expression parenthesis to be mixed with
> function call parenthesis when there is only one parameter ?

For simplicity and elegant coding, so you can do something like you did
at first:

  sum(i for i in range(10))


> IMHO this should be forbidden, usage must not be different when there is
> only one parameter and when there are more parameters.

The problem in your last test is that if you use more than one argument,
you *must* use the parenthesis. In Py2.5 there's a better message error:

>>> f(4,i for i in range(10))
  File "<stdin>", line 1
SyntaxError: Generator expression must be parenthesized if not sole argument


The correct way to do that is:

>>> f(4,(i for i in range(10)))
4 (<generator object at 0xb7dab56c>,)

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From mail at microcorp.co.za  Wed Mar 14 03:44:24 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 14 Mar 2007 09:44:24 +0200
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au><55fbgjF2492skU1@mid.individual.net><1173573654.009953.266280@30g2000cwc.googlegroups.com><7xbqj01u9c.fsf@ruckus.brouhaha.com><slrnevae8j.dr9.nick@irishsea.home.craig-wood.com><01f501c7653e$1ee8cee0$03000080@hendrik>
	<op.to437igfx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <020901c7660c$b478ba00$03000080@hendrik>


"Gabriel Genellina" <ga...l-py2 at yahoo.com.ar> wrote:

>You can't have two different sets with four equal numbers - it's not a
>very difficult thing, it's impossible to distinguish because they're
>identical!
>Given 4 numbers in the set, the 5th is uniquely determined. By example:
>12, 3, 10, 18 *must* end with 7. The 5th number is not "random". Any
>randomness analysis should include only the first 4 numbers (or any other
>set of 4).
>In other words, there are only 4 degrees of freedom. In the fence analogy,
>you only have to choose where to place 4 poles; the 5th is fixed at the
>end.

Yes - the requirement of "5 random numbers" is in a sense in conflict
with the requirement of "that add up to 50" - because for the fifth number,
given that you have chosen the other 4, you have to "get lucky" and
choose the "right one" if you are doing it randomly...

What my question was about was whether some sort of cluster
analysis applied to the results of repeated application of two algorithms
would reveal the way in which the numbers were chosen - the first one being
choose five numbers, see if they add up to 50, repeat if not, repeat till say
1000 samples generated, and the second being choose four numbers,
see if they add to less than 50, repeat if not, else make the fifth the
difference
between the sum and 50, repeat till 1000 instances generated...

Intuitively, the second one will run a LOT faster, all other things being equal,
and I was simply wondering if one could tell the difference afterwards -
in the first case all the numbers clearly come from the same population,
while in the second case four of them do, and the fifth could possibly
be from a different population, as it was "forced" to make up the difference.

So I am not so very sure that the set of fifth numbers of the second run
would actually be indistinguishable from that of the first.

- Hendrik






From lbates at websafe.com  Wed Mar 14 15:27:10 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 14 Mar 2007 14:27:10 -0500
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <mailman.5106.1173899956.32031.python-list@python.org>
References: <45F843AD.6050509@gmx.net> <et9h7k$ehr$1@sea.gmane.org>
	<mailman.5106.1173899956.32031.python-list@python.org>
Message-ID: <45F84C8E.3020106@websafe.com>

Thomas Ploch wrote:
> Steve Holden schrieb:
>> Clearly if form['uploadfile'] is returning the client's path information 
>> you do have to remove that somehow before further processing, which also 
>> means you need to deduce what the client architecture is to correctly 
>> remove path data. Of course this also leaves open the question "what 
>> does a Mac client return?", and you might want to cater for that also.
> 
> I tested from linux and Mac OS, and on both os.path.basename() works as
> expected (since the server it runs on is a UNIX one). That brings me to
> the question, how Do I a) get the cients architecture and b) send the
> architecture of the client through cgi.FieldStorage()?
> 
>> I suspect you will also find that there are at least some circumstances 
>> under which a Unix browser will also include path information.
> 
> Which ones should that be? Since os.path.basename() _is_ doing the right
> thing on *nix style paths (Mac OS is not different there), I cant think
> of other circumstances.
> 
> 
>> I presume you are looking to use the same filename that the user 
>> provided on the client? Does this mean that each user's files are 
>> stored in different directories? Otherwise it's not always a good idea 
>> to use filenames provided by the user for files on the server anyway.
> 
> Yes, each User has his own directory. Files get timestamped and then put
> into the corresponding directory. It is just that having
> 'C:\a\very\long\path\file.ext' as a filename on the server is not nice.
> 
> Thomas
> 

You will need to write some Javascript and assign something to a hidden
field that gets posted.  Here is some Javascript to get you started:

http://www.javascripter.net/faq/operatin.htm

-Larry


From danilo.horta at gmail.com  Mon Mar 19 09:50:48 2007
From: danilo.horta at gmail.com (Horta)
Date: 19 Mar 2007 06:50:48 -0700
Subject: Timeout to readline()/readlines()
Message-ID: <1174312248.404607.212110@b75g2000hsg.googlegroups.com>

      Hi folks,
  Sometimes, when I do an os.popen*(), the process executed by the
command hangs, and the script stops forever on the readline()/
readlines() calls. I found that I can use select, but I'm thinking...
if, after a sellect() call returns, the stdout (for example) has more
than one line? or if it has just some characters, no newline, and the
process just hangs?

  I just want a readline(timeout) and readlines(timeout) like
functions. Do I need to create my owns or there're already
implemented?

  Thanks.



From jantod at gmail.com  Sun Mar 11 08:47:34 2007
From: jantod at gmail.com (Janto Dreijer)
Date: 11 Mar 2007 05:47:34 -0700
Subject: threading and iterator crashing interpreter
In-Reply-To: <mailman.4935.1173613653.32031.python-list@python.org>
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
Message-ID: <1173617253.901671.136910@q40g2000cwq.googlegroups.com>

On Mar 11, 1:46 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 11 Mar 2007 07:32:04 -0300, Janto Dreijer <jan... at gmail.com>
> escribi?:
>
>
>
> > I have been having problems with the Python 2.4 and 2.5 interpreters
> > on both Linux and Windows crashing on me. Unfortunately it's rather
> > complex code and difficult to pin down the source.
>
> > So I've been trying to reduce the code. In the process it's started to
> > crash in different ways. I'm not sure if any of it is related. The
> > following is only crashing Python 2.5 (r25:51908, Sep 19 2006,
> > 09:52:17) [MSC v.1310 32 bit (Intel)] on win32 in two different(?)
> > ways.
>
> > ====================
>
> > Using the login1() function will throw a bunch of exceptions the most
> > interesting of which is:
>
> > Exception in thread Thread-34:
> > Traceback (most recent call last):
> >   File "C:\Python25\lib\threading.py", line 460, in __bootstrap
> >     self.run()
> >   File "C:\Python25\lib\threading.py", line 440, in run
> >     self.__target(*self.__args, **self.__kwargs)
> >   File "Copy of scratchpad.py", line 20, in login1
> >     random.choice(System.sessions).session_iter.next()
> > RuntimeError: instance.__dict__ not accessible in restricted mode
>
>  From the error message, you appear to be using some form of restricted
> execution - RExec or similar. I didn't try that way, but using the normal
> mode, I got this different exception instead (using login1):
>
> Exception in thread Thread-85:
> Traceback (most recent call last):
>    File "c:\apps\python\lib\threading.py", line 460, in __bootstrap
>      self.run()
>    File "c:\apps\python\lib\threading.py", line 440, in run
>      self.__target(*self.__args, **self.__kwargs)
>    File "crash.py", line 20, in login1
>      random.choice(System.sessions).session_iter.next()
> ValueError: generator already executing
>
> It appears to indicate that you must syncronize the generators.
> Adding a Lock object to Session appears to work OK:
>
> class Session:
>          def __init__(self):
>                  self.lock = Lock()
>                  self.session_iter = session_iter(self)
>
> def login1():
>          # first interpreter
>          System.sessions.append(Session())
>          while 1:
>                  session = random.choice(System.sessions)
>                  session.lock.acquire()
>                  session.session_iter.next()
>                  session.lock.release()
>
> Your login2 version does not generate any error on my PC.
>
> --
> Gabriel Genellina

As far as I can tell I'm not running it from restricted mode
explicitly.

The reason I'm doing the random.choice() is so I don't have a handle
("session" in this case) that would prevent it from being garbage
collected. I am not bothered by the Python-level Exceptions. I am
bothered by the interpreter throwing a segfault. What I suspect is
happening is the Session object is deallocated, while it still has a
reference from within the iterator.

It's quite difficult to reproduce these bugs consistently. You might
need to run it a few times.



From robert.kern at gmail.com  Thu Mar 15 03:25:03 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 15 Mar 2007 02:25:03 -0500
Subject: Python eggs and openSuse 10.2 errors
In-Reply-To: <1173942600.262524.196550@n59g2000hsh.googlegroups.com>
References: <1173942600.262524.196550@n59g2000hsh.googlegroups.com>
Message-ID: <etascj$7s1$1@sea.gmane.org>

Turd Flop Down M'leg wrote:
> Heyas
> 
> So I got all hooked on python eggs at pycon, but then I got all hooked
> on openSuse 10.2 (with the xgl cube and the beryl fanciness, and some
> other misc debris).  Unfortunately, it doesnt appear that openSuse
> 10.2, which is using python 2.5, wants to play nicely with python
> eggs.  When I try to run `sudo python ez_setup.py`, I simply get an
> error:
>    Downloading http://cheeseshop.python.org/packages/2.5/s/setuptools/setuptools-0.6c5-py2.5.egg
>    error: invalid Python installation: unable to open /usr/lib/
> python2.5/config/Makefile (No such file or directory)
> 
> The /usr/lib/python2.5/config directory didnt exist, so I tried
> creating it but with no change in results.

You need to install the development package for python. It should be called
python2.5-devel or something similar.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From z80vsvic20 at hotmail.com  Wed Mar 28 02:56:36 2007
From: z80vsvic20 at hotmail.com (Eric von Horst)
Date: 27 Mar 2007 23:56:36 -0700
Subject: wxPython, Syntax highlighting
Message-ID: <1175064996.150578.300170@l77g2000hsb.googlegroups.com>

Hi,

I am looking for wx widget that has the ability to show text, edit the
text (like a TextCtrl) but also does syntax highlighting (if the text
is e.g. XML or HTML).
I have been looking in the latest wxPython version but I could not
really find anything.

Any suggestions?

(I need this because my collegue who is very Java-minded can
apparently do that without any problems)

Kd



From thinker at branda.to  Wed Mar 21 09:41:44 2007
From: thinker at branda.to (Thinker)
Date: Wed, 21 Mar 2007 21:41:44 +0800
Subject: encoding characters
In-Reply-To: <b35f5c730703210352v3d01b10bs40ff213a3f862e9d@mail.gmail.com>
References: <b35f5c730703210352v3d01b10bs40ff213a3f862e9d@mail.gmail.com>
Message-ID: <46013618.4050207@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Valentina Marotto wrote:
>
>
> The problem is about the insertion data into database.
>
> one of errors is:
>
> exceptions.UnicodeEncodeError: 'ascii' codec can't encode
> characters in position 25-26: ordinal not in range(128)
>
> <http://baghera.crs4.it:8080/sources#tbend> help me! Thanks
More information, please.
For example, what DBMS are used. Snippet run into error!

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFGATYX1LDUVnWfY8gRAtkgAKC9VV4GrraeL9+f3WcHuoUIvZQsLwCg4vPq
qTMx1Rbr5vUGGwmO5hGn/hU=
=zWkT
-----END PGP SIGNATURE-----



From steve at holdenweb.com  Tue Mar 27 09:48:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 27 Mar 2007 09:48:25 -0400
Subject: socket read timeout
In-Reply-To: <eub6un$k3d$3@nemesis.news.tpi.pl>
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
Message-ID: <eub7be$3qd$1@sea.gmane.org>

Jarek Zgoda wrote:
> hg napisa?(a):
> 
>> I am looking for the most efficient / cleanest way to implement a socket
>> read with timeout (Windows mainly but would be great if the same code
>> worked under *nix)
> 
> Did you see http://www.timo-tasi.org/python/timeoutsocket.py ?
> 
Note that since 2.4, I believe, sockets in the standard library allow 
you to specify a timeout parameter.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From pengning at kingsoft.net  Sun Mar 18 00:40:06 2007
From: pengning at kingsoft.net (bruce peng)
Date: Sun, 18 Mar 2007 12:40:06 +0800
Subject: How to parse the os.system() output in python
References: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>
	<mailman.5237.1174189740.32031.python-list@python.org>
Message-ID: <etifo0$vj7$1@news.yaako.com>

how to redirect the putput of the
program to a file?

thanks.
"Sebastian Bassi" <sbassi at clubdelarazon.org> wrote in message 
news:mailman.5237.1174189740.32031.python-list at python.org...
> On 17 Mar 2007 17:28:56 -0700, yinglcs at gmail.com <yinglcs at gmail.com> 
> wrote:
>> I use os.system() to execute a system command in python.
>> Can you please tell me how can I parse (in python) the output of the
>> os.system()  ?
>
> Maybe you mean to parse the output of the program you run using
> os.system. If this is the case, you should redirect the putput of the
> program to a file (with ">") and then parse that file.
>
> Best,
> SB. 




From riko at despammed.com  Thu Mar 22 17:35:53 2007
From: riko at despammed.com (Enrico 'Mc Osten' Franchi)
Date: Thu, 22 Mar 2007 22:35:53 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	couldbe PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<mailman.5413.1174502330.32031.python-list@python.org>
	<1174502836.912713.294390@y80g2000hsf.googlegroups.com>
Message-ID: <1hvede4.h5flxy1cl04lkN%riko@despammed.com>

<bearophileHUGS at lycos.com> wrote:

> But I think in some situations Ruby allows to omit them, solving some
> of the "impossibile" problems shown in this thread. This makes Ruby a
> bit better than Python to create application-specific mini languages,
> that are quite useful in some situations.

Yes. However, Ruby parser has to resort to heuristic in many cases:

<http://www.rubycentral.com/book/language.html>

"When Ruby sees a name such as ``a'' in an expression, it needs to
determine if it is a local variable reference or a call to a method with
no parameters. To decide which is the case, Ruby uses a heuristic."

In fact it is something I don't really like about Ruby (even though I
find it useful in some cases).

This is a 'pathological example'

def a
  print "Function 'a' called\n"
  99
end


for i in 1..2
  if i == 2
    print "a=", a, "\n"
  else
    a = 1
    print "a=", a, "\n"
  end
end


But I have to say that omitting brackets in a language such as Python or
Ruby can make the code very hardly readable. The interpreter isn't the
only one who has to resort to heuristic: everytime you read a name with
no parenthesis you may have to go back and see whether it is a bound
variable, a method (so you may have to check documentation for various
modules) or an 'invalid' variable you forgot to initialize.

In fact, when I'm reading code from a project I'm not familiar with, it
can be quite hard in the first place. 

In fact most Rubyists advice to use parentheses (unless you want to
achieve a DSL like effect, or in very simple cases like

puts s

)

The third problem I found out is related to blocks ({} and do have
different precedence order). They are only syntax errors, but I find
them annoying.

-- 
blog:  http://www.akropolix.net/rik0/blogs | Uccidete i filosofi,
site:  http://www.akropolix.net/rik0/      | tenetevi riso e
forum: http://www.akropolix.net/forum/     | bacchette per voi.


From daftspaniel at gmail.com  Wed Mar 14 10:19:24 2007
From: daftspaniel at gmail.com (daftspaniel at gmail.com)
Date: 14 Mar 2007 07:19:24 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173862973.001501.200090@o5g2000hsb.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
	<1173728423.775330.164470@t69g2000cwt.googlegroups.com>
	<1173731204.621260.192000@30g2000cwc.googlegroups.com>
	<1173747288.760536.60020@j27g2000cwj.googlegroups.com>
	<1173822266.306935.199410@o5g2000hsb.googlegroups.com>
	<1173862973.001501.200090@o5g2000hsb.googlegroups.com>
Message-ID: <1173881964.062448.245390@y80g2000hsf.googlegroups.com>

On Mar 14, 9:02 am, "imx" <xiong.xu... at gmail.com> wrote:
> Cool, but does it mean that I will need .net to run the code?

Yep - runtime is free though as is IronPython. For my program the
license is BSD.

Cheers,
Davy



From lucastorri at gmail.com  Mon Mar 12 11:00:19 2007
From: lucastorri at gmail.com (Lucas Torri)
Date: Mon, 12 Mar 2007 12:00:19 -0300
Subject: backslashes in lists
In-Reply-To: <BAY126-W1035B549162BA0DFB02563D37D0@phx.gbl>
References: <BAY126-W1035B549162BA0DFB02563D37D0@phx.gbl>
Message-ID: <b58273130703120800x50cb7268m328ebc1459c77271@mail.gmail.com>

The backslash is a key to enter especial characters, like breakline: '\n'

There is two backslashes cause of this especial condition of this char, but
if you try print the specific string you will see that only one backslash
remain:

print alist[2]

On 3/12/07, Fabio Gomes <flgoms at hotmail.com> wrote:
>
>  Hi list,
>
>   I'm trying to use a string with backslashes in a list. But Python parses
> strings in lists with repr().
>
>
> >>> alist = ['a', 'b', 'c:\some\path']
> >>> alist
> ['a', 'b', 'c:\\some\\path']
> >>> print alist
> ['a', 'b', 'c:\\some\\path']
>
>
>   I already tried str() and raw (r) but it didn't work. All I want is to
> keep a single backslash in the string since it is a path information.
>
>   Can anyone help me, please?
>
>   Thank you.
>
> ------------------------------
> O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na
> Web e sua rede amigos. Confira! <http://spaces.live.com/signup.aspx>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From harlinseritt at yahoo.com  Fri Mar 23 09:48:20 2007
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Mar 2007 06:48:20 -0700
Subject: Catching an unknown error
In-Reply-To: <1174657346.379483.72200@e1g2000hsg.googlegroups.com>
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
	<1174657346.379483.72200@e1g2000hsg.googlegroups.com>
Message-ID: <1174657700.265254.292590@n59g2000hsh.googlegroups.com>

On Mar 23, 9:42 am, kyoso... at gmail.com wrote:
> On Mar 23, 8:16 am, "Harlin Seritt" <harlinser... at yahoo.com> wrote:
>
>
>
> > Using the code below:
>
> > ---BEGIN CODE---
>
> > value = raw_input("Type a divisor: ")
> > try:
> >    value = int(value)
> >    print "42 / %d = %d" % (value, 42/value)
> > except ValueError:
> >         print "I can't convert the value to an integer"
> > except ZeroDivisionError:
> >         print "Your value should not be zero"
> > except:
> >         print "Something unexpected happened"
>
> > ---END CODE---
>
> > In the last 'except' block, how can I print out the particular error
> > name even though one is not specifically named?
>
> > Thanks,
>
> > Harlin
>
> Thanks for pointing that out. I was following logic I was taught in
> Hetland's book, which supposedly was up-to-date for Python 2.4.
> Typical textbook error.
>
> Mike

Thanks guys... that gets 'er done.

Harlin Seritt



From steve at holdenweb.com  Thu Mar 22 22:24:44 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 22:24:44 -0400
Subject: Idiom for running compiled python scripts?
In-Reply-To: <pan.2007.03.23.01.01.15@mailinator.com>
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
Message-ID: <etvds6$hpv$1@sea.gmane.org>

Mark wrote:
> So given the lack of response it seems that there is probably no such
> idiom and that I should not be concerned by the inefficiency inherent in
> running .py scripts directly?
> 
> I did some time tests and sure, the speed gain is slight, but it is a 
> gain none the less.

Sorry, what you really need is the compileFile() function from the 
compiler module.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From alainpoint at yahoo.fr  Tue Mar 27 04:39:35 2007
From: alainpoint at yahoo.fr (alain)
Date: 27 Mar 2007 01:39:35 -0700
Subject: SPE question
Message-ID: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>

Hi,

Could someone tell me how to uninstall SPE under windows?

Alain



From nick at craig-wood.com  Fri Mar  9 08:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 09 Mar 2007 07:30:08 -0600
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
	<45f138ee$0$23918$426a74cc@news.free.fr>
	<m11wjyy7p5.fsf@chezmarshall.freeserve.co.uk>
Message-ID: <slrnev2m9v.179.nick@irishsea.home.craig-wood.com>

Robert Marshall <spam at chezmarshall.freeserve.co.uk> wrote:
>  On Fri, 09 Mar 2007, Bruno Desthuilliers wrote:
> 
> > 
> > Nick Craig-Wood a ?crit :
> >> dbhbarton at googlemail.com <dbhbarton at googlemail.com> wrote:
> >>>  What if 2 new 'special' comment-like characters were added to
> >>>  Python?:
> >>>
> >>>
> >>>  1. The WIP (Work In Progress) comment:
> >>
> >> I use # FIXME for this purpose or /* FIXME */ in C etc.
> >>
> >> I have an emacs macro which shows it up in bright red / yellow text
> >> so it is easy to see
> > 
> > <ot>
> > Care to share this macro ?
> > </ot>
> 
>  I have this
> 
>  (cond (window-system
>     (progn
>       (font-lock-add-keywords 
>          'python-mode '(("\\<FIXME: .*$" 0 font-lock-warning-face prepend))))))

This is what I use which is very similar

(font-lock-add-keywords 'python-mode
  '(
    ("\\<\\(FIXME\\):?" 1 font-lock-warning-face prepend)
    )
  )

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From mboldin_2000 at yahoo.com  Sun Mar  4 09:26:42 2007
From: mboldin_2000 at yahoo.com (Michael Boldin via alt email)
Date: Sun, 4 Mar 2007 06:26:42 -0800 (PST)
Subject: IDLE & MySQLdb import error
Message-ID: <158410.47599.qm@web30812.mail.mud.yahoo.com>

I installed python 2.5 and used the win package for installing MySQLdb.  (I am running Windows XP)
Everything works as expected using python directly (Windows command shell) but using IDLE gives the import error below.
Same error with PythonWin as my IDE and everything works using python 2.4-- with IDLE and without, mySQLdb is loaded with out error.
Below is the IDLE screen capture

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
    ****************************************************************
    Personal firewall software may warn about the connection IDLE
    makes to its subprocess using this computer's internal loopback
    interface.  This connection is not visible on any external
    interface and no data is sent to or received from the Internet.
    ****************************************************************
    
IDLE 1.2      
>>> import MySQLdb
Traceback (most recent call last):
  File "<pyshell#1>", line 1, in <module>
    import MySQLdb
  File "C:\Python25\lib\site-packages\MySQLdb\__init__.py", line 19, in <module>
    import _mysql
ImportError: DLL load failed: The specified procedure could not be found.
>>>

It seems that when using IDLE the _mysql package can not be found although the path is the same as non-IDLE 
python and help('modules') shows _mysql is an available.

Is this an IDLE or MySQLdb bug or some incorrect settign on my side


 
____________________________________________________________________________________
Looking for earth-friendly autos? 
Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center.
http://autos.yahoo.com/green_center/


From olsonas at gmail.com  Wed Mar 14 11:30:27 2007
From: olsonas at gmail.com (Drew)
Date: 14 Mar 2007 08:30:27 -0700
Subject: dict.items() vs dict.iteritems and similar questions
Message-ID: <1173886227.609832.170540@l75g2000hse.googlegroups.com>

When is it appropriate to use dict.items() vs dict.iteritems. Both
seem to work for something like:

for key,val in mydict.items():
  print key,val

for key,val in mydict.iteritems():
  print key,val

Also, when is it appropriate to use range() vs xrange(). From my
understanding, xrange() essentially gives you an iterator across a
range, so it should be used when iterating. Should you only use
range() when want to physically store the range as a list?

Thanks,
Drew



From mail at microcorp.co.za  Fri Mar  2 01:29:00 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 2 Mar 2007 08:29:00 +0200
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com><1172757183.819978.219440@v33g2000cwv.googlegroups.com><1172764725.827624.298180@j27g2000cwj.googlegroups.com><1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<1172774172.389220.124170@j27g2000cwj.googlegroups.com>
Message-ID: <015601c75c94$10af7d40$03000080@hendrik>

<gregpinero at gmail.com> wrote:

> Thanks Bart.  That's perfect.  The other suggestion was to precompute
> count1 for all possible bytes, I guess that's 0-256, right?

0 to 255 inclusive, actually - that is 256 numbers...

The largest number representable in a byte is 255

eight bits, of value 128,64,32,16,8,4,2,1

Their sum is 255...

And then there is zero.

- Hendrik



From luismgz at gmail.com  Fri Mar  2 18:48:03 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 2 Mar 2007 15:48:03 -0800
Subject: class declaration shortcut
In-Reply-To: <1172878142.169464.161690@31g2000cwt.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172878142.169464.161690@31g2000cwt.googlegroups.com>
Message-ID: <1172879283.545209.100480@j27g2000cwj.googlegroups.com>

On Mar 2, 8:29 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> On Feb 28, 1:26 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
>
> > I've come across a code snippet inwww.rubyclr.comwhere they show how
> > easy it is to declare a class compared to equivalent code in c#.
> > I wonder if there is any way to emulate this in Python.
>
> I posted like 10 minutes ago, but it looks like it didn't go through.
> The ruby code is not an easy way to declare a class, it is a ruby
> class for creating c-like struct objects.
>
> This is the basic idea behind the ruby Struct class (but this is quick
> and dirty, the real implementation is different and done in c, but you
> should get the basic idea):
>
> class Struct2
>     def initialize(*args)
>         @@attrs = []
>         args.each { |arg|
>             eval("class << self; attr_accessor :#{arg} end")
>             @@attrs.push(arg)
>         }
>     end
>     def new(*args)
>         args.each_index { |i|
>             eval("self.#{@@attrs[i]}=args[i]")
>             return self
>         }
>     end
> end
>
> Person = Struct2.new(:name)
> bob = Person.new('bob')
> puts bob.name
>
> A python equiv. would be something like:
>
> class Struct():
>     def __init__(self, *args):
>         self.attrs = []
>         for arg in args:
>             setattr(self, arg, None)
>             self.attrs.append(arg)
>     def __call__(self, *args):
>         for i in range(len(args)):
>             setattr(self, self.attrs[i], args[i])
>         return self
>
> Person = Struct('name')
> bob = Person('bob')
> print bob.name
>
> Regards,
> Jordan


Thanks for your detailed reply!
So after all, the www.rubyclr.com code is not a fair comparison.
Because the c# code shows a class definition, and the ruby code shows
a struct definition, which is not equivalent to a class.
Is that right?



From stefaan.himpe at gmail.com  Mon Mar 19 15:32:47 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 19 Mar 2007 12:32:47 -0700
Subject: XML based programming language
In-Reply-To: <567h7sF287idqU1@mid.uni-berlin.de>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
	<567h7sF287idqU1@mid.uni-berlin.de>
Message-ID: <1174332767.221788.252460@l77g2000hsb.googlegroups.com>

> All of these are grammar-specifications that allow you to define the
> structure of your XML-documents with more constraints.

Ok, I should have foreseen the schema checker answer...my point really
is that
yacc can do even more than just checking the conformance to a grammar.

It also allows me to specify semantic actions,
e.g. to help in building an abstract syntax tree from
the concrete syntax tree, or to implement a very basic
interpreter...

mock example:
<input><definevar name="a" value="10"/><definevar name="b" value="12" /
></input>
<output><sum arg1="a" arg2="b"/></output>

No schema checker can take this specification and simply output "22".
XSLT might be able to implement it, but it is complex for anything
real-life. Elementtree can immediately give me the concrete syntax
tree,
but any semantic actions have to be implemented during a
manually programmed tree traversal.

Anyway, it is not urgent for me, I have something which works,
it just seems like something's missing still from the
existing XML tool collection. Or I am being thick-headed ;)




From hq4ever at gmail.com  Mon Mar 12 07:29:03 2007
From: hq4ever at gmail.com (Maxim Veksler)
Date: Mon, 12 Mar 2007 13:29:03 +0200
Subject: programmatically manipulation environment variables of the
	calling shell
In-Reply-To: <F217FCE7-18E0-495D-A2E9-87D28F15224C@comhem.se>
References: <b400c69a0703120333m5565c233laaf1247ed8fb5601@mail.gmail.com>
	<F217FCE7-18E0-495D-A2E9-87D28F15224C@comhem.se>
Message-ID: <b400c69a0703120429o6bb5612fmf56a8a034fbb1b32@mail.gmail.com>

On 3/12/07, Tommy Nordgren <tommy.nordgren at comhem.se> wrote:
>
> On 12 mar 2007, at 11.33, Maxim Veksler wrote:
>
> > Hello list,
> >
> > I'm trying to write a python script that would allow me to manipulate
> > shell variables of the calling shell. I'm trying to write some logic
> > that would know to add LD_LIBRARY_PATH to the users environment.
> >
> > In bash this is done with "export", can I do this with python? (If at
> > all possible because python is actually a sub process of bash).
> >
> > Thank you,
> > Maxim.
>         This is not possible to do directly.
>         There is however a possibility to solve this problem under special
> circumstances.
>         1. Your python (/perl/shell/etc) script must write the wanted
> environment
> variables to standard out, as key-value pairs with a suitable separator.
>         2. The invoking shell must agree with your script as to what
> separator is used.
>         3. In the calling shell do myshellvars=`your_python_script`;
>         4. Now the calling shell can parse the variable myshellvars to set
> up the environment.

Yes, thats exactly what I was set to do.

<<< bash
for export_val in $(python env_variables_maxim.py); do export $export_val; done
>>>

<<< python (env_variables_maxim.py)
print 'FOO=123 BAR=/home/src:$BAR PATH=/nfs/bin'
>>>

Thank you.

> ------
> What is a woman that you forsake her, and the hearth fire and the
> home acre,
> to go with the old grey Widow Maker.  --Kipling, harp song of the
> Dane women
> Tommy Nordgren
> tommy.nordgren at comhem.se
>
>
>
>


-- 
Cheers,
Maxim Veksler

"Free as in Freedom" - Do u GNU ?


From reply at group.invalid  Sat Mar 31 04:13:05 2007
From: reply at group.invalid (Pom)
Date: Sat, 31 Mar 2007 08:13:05 GMT
Subject: wx textctrl font style 
Message-ID: <lKoPh.95364$Kd.480300@phobos.telenet-ops.be>

Hello

I have a tuple of strings which I must show in a textctrl, each item in 
the tuple representing one line of text.

The first three lines of text should each have another style (fontsize 
and color)

i'm using this code to achieve this:
   tmppos = self.txtInfo.GetInsertionPoint() # get the cursor pos
   self.txtInfo.write(str(csr[0])+'\n')
   tmppos2 = self.txtInfo.GetInsertionPoint() # get the new cursor pos
   self.txtInfo.SetStyle(tmppos, tmppos2, wx.TextAttr("BLUE", 
wx.NullColour, tmpnewfont))
   self.txtInfo.write(str(csr[1])+'\n')
   tmppos3 = self.txtInfo.GetInsertionPoint() # get the new cursor pos
   self.txtInfo.SetStyle(tmppos2, tmppos3, wx.TextAttr("BLUE", 
wx.NullColour, tmpnewfont2))
   self.txtInfo.write(str(csr[2])+'\n')
   tmppos4 = self.txtInfo.GetInsertionPoint() # get the new cursor pos
   self.txtInfo.SetStyle(tmppos3, tmppos4, wx.TextAttr(wx.Nullcolour, 
wx.NullColour, tmpnewfont3))


Now, I was wondering if this is the right way of doing this, because I 
have the feeling this code sucks.

Anybody has a better way of doing this?

Thx !!!


From nagle at animats.com  Wed Mar 21 20:17:07 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 22 Mar 2007 00:17:07 GMT
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <etscd5$g0g$1@news.onet.pl>
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
Message-ID: <7WjMh.318$YL5.80@newssvr29.news.prodigy.net>

Marcin Ciura wrote:

> Neither would I. I must have expressed myself not clearly enough.
> Currently
> x = y = z
> is roughly equivalent to
> x = z
> y = z
> I propose to change it to
> y = z
> x = z

Actually, it is equivalent to

	y = z
	x = y

 > Python performs chained assignments backwards compared to other languages...

     C and C++ are both right-to-left, like Python.  In Pascal,
Modula I/II/III, and Ada, assignments are not expressions, so it's not
a meaningful question there.

				John Nagle


From jstroud at mbi.ucla.edu  Thu Mar 22 23:05:41 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 22 Mar 2007 20:05:41 -0700
Subject: Been a while...
In-Reply-To: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
Message-ID: <etvg65$bdp$3@daisy.noc.ucla.edu>

John Salerno wrote:
> Hi guys. It's been a while since I've used Python, so I got a little 
> rusty, but I really want to start using it again, just out of habit and 
> for fun. Can anyone suggest a book or a website with little projects I 
> could work on to keep me busy?
> 
> (I do have Beginning Python with the 10 projects in the back, but those 
> might be a little too involved for me right now.)
> 
> Thanks!
> John

Hawk this list and try to pick off easy answers before anyone else. 
That's what I do. The pressure is to be right, because if you're not, 
you hear about it in a hurry.

James


From malaclypse2 at gmail.com  Thu Mar  1 08:56:40 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 1 Mar 2007 08:56:40 -0500
Subject: Python Tutorial
In-Reply-To: <19269e540703010533u329b2ac2sa82e5e219d7c98f5@mail.gmail.com>
References: <19269e540703010533u329b2ac2sa82e5e219d7c98f5@mail.gmail.com>
Message-ID: <16651e80703010556w1e110c77l7c4a4f4e8a9b9aa9@mail.gmail.com>

On 3/1/07, Timm Florian Gloger <timm.gloger at gmail.com> wrote:
> is Guido van Rossum's "Python Tutorial" in non-HTML formats (e.g. PDF
> or PS) avaiable for free?

Yes.  Download one of the PDF documentation zips from here:
http://docs.python.org/download and extract the tut.pdf file.  AFAIK
it's not available as a seperate download.

-- 
Jerry


From nospam at nospam.com  Thu Mar 22 00:36:10 2007
From: nospam at nospam.com (Mark T)
Date: Wed, 21 Mar 2007 21:36:10 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<7WjMh.318$YL5.80@newssvr29.news.prodigy.net>
	<1hvcadb.134pbvp1y39wi3N%aleax@mac.com>
Message-ID: <DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>


"Alex Martelli" <aleax at mac.com> wrote in message 
news:1hvcadb.134pbvp1y39wi3N%aleax at mac.com...
> John Nagle <nagle at animats.com> wrote:
>
>> Marcin Ciura wrote:
>>
>> > Neither would I. I must have expressed myself not clearly enough.
>> > Currently
>> > x = y = z
>> > is roughly equivalent to
>> > x = z
>> > y = z
>> > I propose to change it to
>> > y = z
>> > x = z
>>
>> Actually, it is equivalent to
>>
>>       y = z
>>       x = y
>
> Not really:
>
>>>> class chatty(object):
> ...   def __init__(self): self.__dict__['__hide'] = {}
> ...   def __setattr__(self, name, value):
> ...     print 'sa', name, value
> ...     self.__dict__['__hide'][name] = value
> ...   def __getattr__(self, name):
> ...     print 'ga', name
> ...     return self.__dict__['__hide'].get(name)
> ...
>>>> c = chatty()
>>>> x = c.zop = 23
> sa zop 23
>>>>
>
> As you can see, there is no read-access to c.zop, which plays the role
> of y there.
>
>
> Alex

This is interesting:

>>> class Test(object):
...   def __getattribute__(self,n):
...     print 'reading',n
...     return object.__getattribute__(self,n)
...   def __setattr__(self,n,v):
...     print 'writing',n,v
...     return object.__setattr__(self,n,v)
...
>>> x=Test()
>>> x.a=1; x.b=2; x.c=3
writing a 1
writing b 2
writing c 3
>>> x.a=x.b=x.c
reading c
writing a 3
writing b 3
>>>

I wouldn't have expected "a" to be assigned first in a right-to-left parsing 
order.  The result is the same in any case.

-Mark T. 



From http  Wed Mar  7 20:41:26 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 17:41:26 -0800
Subject: Flatten a two-level list --> one liner?
References: <mailman.4778.1173312889.32031.python-list@python.org>
Message-ID: <7xk5xs341l.fsf@ruckus.brouhaha.com>

"Sergio Correia" <sergio.correia at gmail.com> writes:
> 2) Reduce
> eggs = reduce(lambda x, y: x+y, spam)
> 
> I feel the 1st way is too cumbersome (three lines), and although I
> like the 2nd way (except for the lambda part), I understand reduce is
> discouraged by Guido so I want to know if there is a "Better Way"(TM)
> ?

I thought map/reduce were considered ok again, but the above runs
in quadratic time, not good.

I'd use:

  eggs = list(itertools.chain(*spam))


From tjreedy at udel.edu  Sun Mar  4 02:20:33 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 4 Mar 2007 02:20:33 -0500
Subject: are there any "Piecewise Cubic Hermite Interpolating Polynomial"
	inpython
References: <1172960724.090104.187690@z35g2000cwz.googlegroups.com>
Message-ID: <esdrvv$l3$1@sea.gmane.org>


"jitasi" <steven.ge at gmail.com> wrote in message 
news:1172960724.090104.187690 at z35g2000cwz.googlegroups.com...
| Hi all
|
| I want to use the matlab function "pchip" in python.
| I have checked the scipy, but there is only spline Interpolating.
| Are there any pchip Interpolating in python?

Putting p.. c.. h.. i.. p... Python into Google gives 165 results.  Have 
you checked any?






From admin at loial.co.uk  Sat Mar 31 08:59:20 2007
From: admin at loial.co.uk (loial)
Date: 31 Mar 2007 05:59:20 -0700
Subject: Need help with python and pyxml on AIX
Message-ID: <1175345960.078897.167410@e65g2000hsc.googlegroups.com>

I have been asked to install a python application on AIX 5.3 that runs
OK on Windows
I have installed Python 4.2.2 from python.org and pyXML form
sourceforge.

However when I run the application I get the following error :

class xml.sax._exceptions.SAXReaderNotAvailable

Do I need to set some Python environment variables?

Can I test the availibility of this from the python command line. e.g
import something?

I am new to Python



From rmcore at gmail.com  Mon Mar 12 13:08:51 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Mon, 12 Mar 2007 12:08:51 -0500
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
Message-ID: <4E8BEE8F-6D5B-44A4-B2D6-A771AD7BDB21@gmail.com>


>
> I wonder whether python can be used to simulate a real user to do the
> following:
> 1) open a web site in a browser;
> 2) printscreen, so to copy the current active window image to
> clipboard;
> 3) save the image file to a real file
>
> Any pointer will be apprieciated!

Which OS?




From paul at boddie.org.uk  Thu Mar  1 08:40:43 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 1 Mar 2007 05:40:43 -0800
Subject: installing "pysqlite"
In-Reply-To: <1172749563.834987.197840@z35g2000cwz.googlegroups.com>
References: <9258d$45e3fa5d$9117fe9b$16503@news2.tudelft.nl>
	<1172576685.560386.306740@m58g2000cwm.googlegroups.com>
	<639dd$45e5625a$9117fe9b$1180@news1.tudelft.nl>
	<1172663495.011225.76410@v33g2000cwv.googlegroups.com>
	<1172741654.589821.255220@v33g2000cwv.googlegroups.com>
	<1172745997.863121.96940@8g2000cwh.googlegroups.com>
	<1172749563.834987.197840@z35g2000cwz.googlegroups.com>
Message-ID: <1172756443.839448.327280@h3g2000cwc.googlegroups.com>

On 1 Mar, 12:46, "Nader" <n.em... at gmail.com> wrote:
>
> ldd returens the next result:
> ldd /usr/people/emami/lib/python2.4/site-packages/pysqlite2/_sqlite.so
>     linux-gate.so.1 =>  (0xffffe000)
>     libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40040000)
>     libc.so.6 => /lib/tls/libc.so.6 (0x40050000)

I think you pasted the nm result in here, but you seem to be missing
libsqlite3.so.0 (from what I see myself). From what I've just read
about linux-gate.so, the linker can't seem to find the SQLite
libraries. More on linux-gate.so here:

http://www.trilithium.com/johan/2005/08/linux-gate/

> and the 'nm' gives this:
>
> nm usr/people/emami/lib/libsqlite3.so | grep  sqlite3_set_authorize
> 0000ce40 T sqlite3_set_authorizer

That looks alright.

>         /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)

I guess this was the end of the ldd result.

I'm out of ideas, unfortunately. I think you should experiment with
LD_LIBRARY_PATH and run ldd again to see if you can get it to show
libsqlite3.so.0. The pysqlite mailing list might be the best place to
ask for help if that doesn't work. Sorry!

Paul



From g.brandl at gmx.net  Wed Mar 28 16:27:38 2007
From: g.brandl at gmx.net (Georg Brandl)
Date: Wed, 28 Mar 2007 22:27:38 +0200
Subject: Question about extending tuple
In-Reply-To: <1175112084.430548.275000@b75g2000hsg.googlegroups.com>
References: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>	<mailman.5721.1175111042.32031.python-list@python.org>
	<1175112084.430548.275000@b75g2000hsg.googlegroups.com>
Message-ID: <euej3r$upt$1@sea.gmane.org>

abcd schrieb:
>> As an immutable type, tuple makes use of __new__.
>>
>> class MyTuple(tuple):
>>      def __new__(cls, *args):
>>          return tuple.__new__(cls, args)
>>
>> should work.
>>
>> Georg
> 
> strange.  not very consistent.

On the contrary -- __new__ *and* __init__ exist for all types.
The only difference is where a specific object is initialized, and
therefore which method you have to override.

__new__ is a static method (it doesn't need to be declared as one,
this is done automatically as it predates the introduction of
staticmethod()) which is called to *construct* an instance.
This can only be done once for a specific object since each call to
__new__ will result in a *new* object. In other words, this is
perfect for immutable objects -- once created, never changed.

__init__, OTOH, is called on the *instance* to initialize it. Of
course, this process can be repeated, and is therefore apt for
mutable objects like lists.

I hope you see now why it is consistent.

Georg



From simon at brunningonline.net  Wed Mar 14 06:45:05 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 14 Mar 2007 10:45:05 +0000
Subject: Attribute monitoring in a class
In-Reply-To: <45F7CF5F.7090005@gmail.com>
References: <45F7CF5F.7090005@gmail.com>
Message-ID: <8c7f10c60703140345t66d37738q99aa705a54df44db@mail.gmail.com>

On 3/14/07, Joel Andres Granados <joel.granados at gmail.com> wrote:
> I have googled quite a bit on this matter and I can't seem to find what
> I need (I think Im just looking where I'm not suppose to :).  I'm
> working with code that is not of my authorship and there is a class
> attribute that is changes by directly referencing it (object.attr =
> value) instead of using a getter/setter (object.setAttr(Value) )
> function.  The thing is that I have no idea when the change occurs and I
> would REALLY like to find out.
> So here comes my question .....
> Is there a function construct inside a python class that is
> automatically called when an attr is changed????

You want __setttr__(). See <http://docs.python.org/ref/attribute-access.html>.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning
MSN: small_values


From israphelr at googlemail.com  Tue Mar 13 18:54:24 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 13 Mar 2007 15:54:24 -0700
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <NIWdnbz1EMIkt2rYnZ2dnUVZ_o6gnZ2d@comcast.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
	<NIWdnbz1EMIkt2rYnZ2dnUVZ_o6gnZ2d@comcast.com>
Message-ID: <1173826464.713183.47530@y66g2000hsf.googlegroups.com>

On Mar 13, 10:50 pm, Larry Bates <lba... at websafe.com> wrote:
> israph... at googlemail.com wrote:
> > Hi all.
>
> > I have a problem with some code :(
>
> > -----------
>
> > hint = raw_input("\nAre you stuck? y/n: ")
> > hint = hint.lower()
>
> > while (hint != 'n') or (hint != 'y'):
> >     hint = raw_input("Please specify a valid choice: ")
>
> > ---------------------------------------------
>
> > so everytime I run the program, and enter my choice as y or n, I'm
> > told to 'Please Specify a valid Choice Again' and can't get out of the
> > loop.
>
> > -----------
>
> > hint = raw_input("\nAre you stuck? y/n: ")
> > hint = hint.lower()
>
> > while (hint != 'n'):
> >     hint = raw_input("Please specify a valid choice: ")
>
> > ---------------------------------------------
>
> > As for here when I enter n, I can leave the while loop.
>
> > Anyway I can't put my finger on this, so I'd be real grateful if
> > someone could tell me what I've done wrong. Thanks.
> > (I have a guy feeling it's something really silly I'm overlooking...)
>
> Your if test is wrong.
>
> If hint='n'
>
> hint !='n' is False
> hint !='y' is True
>
> False or True equals True
>
> I think you want something like:
>
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
>
> while hint not in ['y', 'n']:
>     hint = raw_input("Please specify a valid choice: ")
>
> -Larry

Thanks Larry.



From duncan.booth at invalid.invalid  Fri Mar 30 10:19:06 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 Mar 2007 14:19:06 GMT
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <Xns99039BD4762EFduncanbooth@127.0.0.1>

"DE" <devrim.erdem at gmail.com> wrote:

> Here is what I do in C++ and can not right now in python :
> 
> pushMatrix()
> {
>      drawStuff();
> 
>      pushMatrix();
>      {
>             drawSomeOtherStuff()
>      }
>      popMatrix();
> }
> popMatrix();
> 

If I understand this contortion is because you have some sort of stack 
and you want the code to follow the depth as you push and pop things 
from the stack.

If you write this in Python then when drawSomeOtherStuff() throws an 
exception your 'stack' will get messed up, so you'll need to add some 
more code to handle this. Using Python 2.5 this is the sort of thing you 
should end up with (and you'll notice that your indentation appears 
naturally when you do this):


from __future__ import with_statement
from contextlib import contextmanager

# Dummy functions so this executes
def pushMatrix(arg): print "pushMatrix", arg
def popMatrix(arg): print "popMatrix", arg
def drawStuff(): print "drawStuff"
def drawSomeOtherStuff(): print "drawSomeOtherStuff"

# The matrix stack implemented as a context handler.
@contextmanager
def NewMatrixContext(arg):
    pushMatrix(arg)
    try:
        yield
    finally:
        popMatrix(arg)

# and finally the function to actually draw stuff in appropriate
# contexts.
def fn():
    with NewMatrixContext(1):
        drawStuff()
        with NewMatrixContext(2):
            drawSomeOtherStuff()

fn()


From aleax at mac.com  Thu Mar 15 10:50:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 07:50:44 -0700
Subject: Returning other instance from __init__
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
	<1173958589.875188.203900@y80g2000hsf.googlegroups.com>
Message-ID: <1hv0amj.14r0m02if7iblN%aleax@mac.com>

Paul Boddie <paul at boddie.org.uk> wrote:
   ...
> > > class C1:
> > >       def __init__(self,xxx):
   ...
> > Use __new__ for such purposes, not __init__.  (You need to make C1
> > newstyle, e.g. inherit from object, to make special method __new__
> > work).
> 
> Call me a traditionalist, but why wouldn't a factory function be good
> enough?

That depends on whether you need name C1 to refer to a class, or not.

If you want name C1 to be usable outside this module as a class (to
subclass it, use with isinstance or issubclass, be available to an IDE's
classbrowser or other means of introspection including pydoc, etc), then
making name C1 refer to a function instead would not work.

> Or perhaps seeing more special methods and decorators just puts me in
> a grumpy mood. ;-) For me, the power of Python is derived from being
> able to do things like making callables "constructors" whilst
> providing some illusion that C1 (in this case) is a class.

For me, OTOH, it's not just smoke and mirrors (or as you say
"illusion"), there's also plenty of real power, and __new__ is part of
that.  (Decorators however are just handy syntax -- they let you avoid
repeating one name three times, and avoiding repetition is a good thing,
but their real power is essentially that of higher-order-functions that
could of course be used with other syntax if need be).


Alex


From danb_83 at yahoo.com  Sun Mar 11 12:04:51 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 11 Mar 2007 09:04:51 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
Message-ID: <1173629090.993914.55570@30g2000cwc.googlegroups.com>

On Mar 11, 9:31 am, "Mark Dickinson" <dicki... at gmail.com> wrote:
> I get the following behaviour on Python 2.5 (OS X 10.4.8 on PowerPC,
> in case it's relevant.)
>
> >>> x, y = 0.0, -0.0
> >>> x, y
> (0.0, 0.0)
> >>> x, y = -0.0, 0.0
> >>> x, y
>
> (-0.0, -0.0)
>
> I would have expected y to be -0.0 in the first case, and 0.0 in the
> second.  Should the above be considered a bug, or is Python not
> expected to honour signs of zeros?  I'm working in a situation
> involving complex arithmetic where branch cuts, and hence signed
> zeros, are important, and it would be handy if the above code could be
> relied upon to do the right thing.

IIRC, float.__repr__ just does whatever libc does.  Have you tried
using printf("%g, %g", 0.0, -0.0) in a C program?



From mark at mailinator.com  Sun Mar 25 03:10:23 2007
From: mark at mailinator.com (Mark)
Date: 25 Mar 2007 07:10:23 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.22.59.05@mailinator.com>
	<pan.2007.03.25.03.40.32.158357@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2007.03.25.07.10.22@mailinator.com>

On Sun, 25 Mar 2007 13:40:33 +1000, Steven D'Aprano wrote:
> Because this is entirely a trivial saving. Who cares? Sheesh.
> ...
> Saving 18ms on a script that takes 50ms to execute *might* be
> worthwhile, ...

I don't understand your attitude. Sure, we are talking slight savings in
machine efficiency but I am sure the python developers have laboured
many long hours on subtle optimisations of the virtual machine, many of
which probably dwarf the issue discussed here. Tell them their work is
trivial and unnecessary. Every little bit helps. Why do I concern myself
with this inefficiency - because it is there.

Of course I realise the modern mantra that "premature optimisation is
the root of all evil" but I don't subscribe to it. Programmers have been
"encouraged" to not give a toss about efficiency and the outcome is all
too apparent - most software today looks and runs like a pile of crap.


From nagle at animats.com  Sun Mar  4 12:24:15 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 04 Mar 2007 17:24:15 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <45eab67a@news.vo.lu>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
Message-ID: <3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>

Patrick Useldinger wrote:
> http://www.serpentine.com/blog/2006/12/22/how-to-build-safe-clean-python-25-rpms-for-fedora-core-6/

    I've read that.  It's very funny. "Now you?ll need to go into the SOURCES 
directory and frob a single file..."

    It does have something very useful in it - Python's
2.5's dependency list:

sudo yum install autoconf bzip2-devel db4-devel \
expat-devel findutils gcc-c++ gdbm-devel glibc-devel gmp-devel \
libGL-devel libX11-devel libtermcap-devel ncurses-devel \
openssl-devel pkgconfig readline-devel sqlite-devel tar \
tix-devel tk-devel zlib-devel

    If a Python build needs all that, something in ./configure
should be checking for each of those.  After all, that's what
./configure is supposed to be for.  It looks like a Python
install will plow ahead without ncurses-devel, and install a
dud version.

(Why is "make install" doing compiles, anyway?  It should
just be copying.  "make" is supposed to do all the
compiles.)

    This, though, illustrates exactly what I was talking about
  - there is no off the shelf way to install Python 2.5 on
Fedora Core 6.  Others have worked through this and documented
their pain and how to do it manually, but that's not the same
as fixing the packaging problem.

    Debian tries to deal with this problem.   See

http://www.debian.org/doc/packaging-manuals/python-policy/index.html

But Fedora Core does not.

    Perl, PHP, C, C++, and Java don't have this particular
problem.  Python stands alone, out in the cold.

				John Nagle


From bj_666 at gmx.net  Thu Mar 29 14:02:32 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 29 Mar 2007 20:02:32 +0200
Subject: encoding confusions
References: <eugrkh$7n7$1@foggy.unx.sas.com>
Message-ID: <pan.2007.03.29.18.02.31.821534@gmx.net>

In <eugrkh$7n7$1 at foggy.unx.sas.com>, Tim Arnold wrote:

> I have the contents of a file that contains French documentation.
> I've iterated over it and now I want to write it out to a file.
> 
> I'm running into problems and I don't understand why--I don't get how the 
> encoding works.
> My first attempt was just this:
> < snipped code for classes, etc; fname is string, codecs module loaded.>
> < self.contents is the French file's contents as a single string >

What is the type of `self.contents`, `str` or `unicode`?  You *decode*
strings to unicode objects and you *encode* unicode objects to strings. 
It doesn't make sense to encode a string in 'latin-1' because it must be
decoded first and the "automatic" decoding assumes ASCII and barfs if
there's something non-ascii in the string.

Ciao,
	Marc 'BlackJack' Rintsch



From rbutler at mtsu.edu  Sat Mar 24 19:51:34 2007
From: rbutler at mtsu.edu (Ralph Butler)
Date: Sat, 24 Mar 2007 18:51:34 -0500
Subject: question about C extensions
Message-ID: <B4WdnWF575o3JJjbnZ2dnUVZ_vOlnZ2d@comcast.com>

Hi:
I have a question about extending python with C.  I have read the docs 
and done some googling, but come up short on this particular (small) 
problem.  I want to write a c extension to int.  In particular, I want 
to grab the memory for the int from an alternative heap.  I am confused 
about 2 things:  (1) Do I need to call the __init__ function for int 
itself, and if so, how do I do that?  (2)  Do I supply my own tp_alloc 
function to retrieve the memory for my new elements, and if so, what 
should it look like?  (Assume for the moment that I simply plan to do a 
malloc.)

I have attached code that does most of the work and has my initials 
(RMB) at a couple of the pieces of code I think I may need.

Any pointers to fairly specific examples would be appreciated.  I have 
found non-specific examples a bit confusing.

Thanks.
--ralph

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From maxerickson at gmail.com  Tue Mar 13 17:41:33 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Tue, 13 Mar 2007 21:41:33 +0000 (UTC)
Subject: help!! *extra* tricky web page to extract data from...
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
Message-ID: <Xns98F2B3F4E3A7maxericksongmailcom@80.91.229.5>

"seberino at spawar.navy.mil" <seberino at spawar.navy.mil> wrote:

> How extract the visible numerical data from this Microsoft
> financial web site?
> 
> http://tinyurl.com/yw2w4h
> 
> If you simply download the HTML file you'll see the data is *not*
> embedded in it but loaded from some other file.
> 
> Surely if I can see the data in my browser I can grab it somehow
> right in a Python script?
> 
> Any help greatly appreciated.
> 
> Sincerely,
> 
> Chris
> 

The url for the data is in an iframe. If you need to scrape the 
original page for some reason(instead of iframe url directly), you can 
use urlparse.urljoin to resolve the relative url.


max



From bearophileHUGS at lycos.com  Thu Mar  8 06:04:38 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Mar 2007 03:04:38 -0800
Subject: property syntax
In-Reply-To: <mailman.4797.1173349253.32031.python-list@python.org>
References: <1173346452.096798.215970@t69g2000cwt.googlegroups.com>
	<mailman.4797.1173349253.32031.python-list@python.org>
Message-ID: <1173351878.314596.252030@30g2000cwc.googlegroups.com>

Gabriel Genellina:
> You miss this common way, that does not depend on metaclasses,
> nor base classes, nor custom decorators...

My purpose was to discuss a new syntax. The other stuff is mostly for
reference, to show that lot of (some) people has tried to find
alternative solutions to a problem they feel.


> The only drawback is the "deprecated"

I can see other drawbacks: you have to use an explicit doc = "..."
instead of a normal docstring, and you have to remember to put return
property(**locals()) at its end. I don't know if your version is
compatible with Psyco (I presume it's compatible). And I think all
those solutions can't be subclassed like I have shown in the
altenative syntax (but maybe you can find a way to modify the
metaclass version to allow this too).

Bye and thank you,
bearophile



From cjlesh at gmail.com  Wed Mar 21 11:16:39 2007
From: cjlesh at gmail.com (cjl)
Date: 21 Mar 2007 08:16:39 -0700
Subject: difference between urllib2.urlopen and firefox view 'page source'?
In-Reply-To: <mailman.5377.1174459814.32031.python-list@python.org>
References: <mailman.5377.1174459814.32031.python-list@python.org>
Message-ID: <1174490199.317770.168760@l77g2000hsb.googlegroups.com>

Group:

Thank you for all the informative replies, they have helped me figure
things out. Next up is learning beautiful soup.

Thank you for the code example, but I am trying to learn how to
'screen scrape', because Yahoo does make historical stock data
available using the CSV format, but they do not do this for stock
options, which is what I am ultimately attempting to scrap.

Here is what I have so far, I know how broken and ugly it is:

import urllib2, sys
from BeautifulSoup import BeautifulSoup

page = urllib2.urlopen("http://finance.yahoo.com/q/op?s=" +
sys.argv[1])
soup = BeautifulSoup(page)
print soup.find("table",{"id" :"yfncsubtit"}).big.b.contents[0]

This actually works, and will print out the current stock price for
whatever ticker symbol you supply as the command line argument when
you launch this script. Later I will add error checking, etc.

Any advice on how I am using beautiful soup in the above code?

thanks again,
cjl



From steven.bethard at gmail.com  Thu Mar  1 14:37:42 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 01 Mar 2007 12:37:42 -0700
Subject: class declaration shortcut
In-Reply-To: <1172772214.569734.95990@n33g2000cwc.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
	<YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
	<1172772214.569734.95990@n33g2000cwc.googlegroups.com>
Message-ID: <xemdnYBwM6UetnrYnZ2dnUVZ_qarnZ2d@comcast.com>

Arnaud Delobelle wrote:
> On Mar 1, 4:01 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>> Arnaud Delobelle wrote:
> [...]
>> This does pretty much the same thing as the recipe I posted:
> 
> Not at all.  My new_struct create returns a new class which is similar
> to a C struct (notice the __slots__).  The recipe you refer to is
> nothing more a class which can be initialised with some attributes. It
> does not address the OP's question at all.
> 
>>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237

Huh?  It uses __slots__ in almost exactly the same way.  If you just 
s/Struct/Record in your ``new_struct`` function, you'll get essentially 
the same behavior, except that if you use the recipe, you'll get an 
__init__ that handles positional arguments, and displays better help::

     >>> def new_struct(name, *slots):
     ...     return type(name, (Struct,), {'__slots__': slots})
     ...
     >>> Person = new_struct('Person', 'name')
     >>> Person('Bob')
     Traceback (most recent call last):
       File "<interactive input>", line 1, in <module>
     TypeError: __init__() takes exactly 1 argument (2 given)
     >>> Person(name='Bob')
     Person(name='Bob')
     >>> help(Person.__init__)
     Help on method __init__ in module __main__:

     __init__(self, **vals) unbound __main__.Person method

     >>> def new_struct(name, *slots):
     ...     return type(name, (Record,), {'__slots__': slots})
     ...
     >>> Person = new_struct('Person', 'name')
     >>> Person('Bob')
     Person(name='Bob')
     >>> help(Person.__init__)
     Help on method __init__:

     __init__(self, name) unbound records.Person method


Maybe I'm not understanding you?

Steve


From martin.laloux at gmail.com  Tue Mar 27 07:37:31 2007
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: 27 Mar 2007 04:37:31 -0700
Subject: plot dendrogram with python
In-Reply-To: <1174995101.750777.117860@b75g2000hsg.googlegroups.com>
References: <1174987611.314883.150410@y80g2000hsf.googlegroups.com>
	<1174995101.750777.117860@b75g2000hsg.googlegroups.com>
Message-ID: <1174995450.988349.106810@y80g2000hsf.googlegroups.com>

I use pycluster

http://bonsai.ims.u-tokyo.ac.jp/~mdehoon/software/cluster/software.htm#pycluster



From http  Wed Mar  7 23:28:45 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 20:28:45 -0800
Subject: Bug in python!? persistent value of an optional parameter in
	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
	<pan.2007.03.08.04.07.49.661894@REMOVEME.cybersource.com.au>
Message-ID: <7xejo0bbpe.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> def factorial(n, _cache={}):
>     try:
>        return _cache[n]
>     except KeyError:
> There are other ways of implementing caches, but this is quick and easy
> and works well for many functions.

I like this better (examples are untested):

    def factorial(n):
       try:
          return factorial.cache[n]
       except KeyError: pass
       ...
    factorial.cache = {}

you could even use a decorator:

    def memoize(f):  # memoize a 1-arg function
       f.cache = {}
       def g(f,x):
          if x in f.cache: return f.cache[x]
          return f.cache.setdefault(x, f(x))
       return functools.partial(g,f)
    ...

    @memoize
    def factorial(n):
       return 1 if n==0 else n*factorial(n-1)


From steve at REMOVE.THIS.cybersource.com.au  Thu Mar 29 01:08:56 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 29 Mar 2007 15:08:56 +1000
Subject: Modal value of an array
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.29.05.08.55.936109@REMOVE.THIS.cybersource.com.au>

On Wed, 28 Mar 2007 20:40:22 -0700, datta.abhirup at gmail.com wrote:

> Hi
> 
>  How can I find out the modal value in an array. That is the value
> which occurs maximum time in the sequence ..
> 
> e.g. if my array has values like [2,3,2,2,2,4,2,2]  definitely the
> maximum time 2 occurs in the array. so this function should be able to
> return 2 as a result ..
> 
> So is there any function in built in python which can do that ?

No. You need to create a frequency table, then do a reverse-lookup on the
frequency table. Assuming your data is small, this should be plenty fast
enough.

def mode(data):
    # create a frequency table
    freq = {}
    for x in data:
        freq[x] = freq.get(x, 0) + 1
    # find the maximum frequency
    F = max(freq.values())
    # return the items (one or more) with that frequency
    modes = []
    for x, f in freq.items():
        if f == F:
            modes.append(x)
    return modes

>>> mode([2,3,2,2,2,4,2,2])
[2]
>>> mode([2,3,2,3,2,3,4,1])
[2, 3]


-- 
Steven.



From luismgz at gmail.com  Thu Mar  1 15:21:53 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 1 Mar 2007 12:21:53 -0800
Subject: class declaration shortcut
In-Reply-To: <1172772214.569734.95990@n33g2000cwc.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
	<YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
	<1172772214.569734.95990@n33g2000cwc.googlegroups.com>
Message-ID: <1172780513.838701.136340@j27g2000cwj.googlegroups.com>

On Mar 1, 3:03 pm, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
> On Mar 1, 4:01 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>
> > Arnaud Delobelle wrote:
> [...]
> > This does pretty much the same thing as the recipe I posted:
>
> Not at all.  My new_struct create returns a new class which is similar
> to a C struct (notice the __slots__).  The recipe you refer to is
> nothing more a class which can be initialised with some attributes. It
> does not address the OP's question at all.
>
> >      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237
>
> > Note that your approach requires repetition of the 'Person' and quotes
> > around each attribute name, which the OP complained about. The recipe at
> > least gets rid of the repetition of 'Person'.
>
> The 'name' argument is not necessary.  It is just here to give a user-
> friendly name to the newly created class.
> One could just as well write the new_struct function so that
>
> >>> Person = new_struct('name', 'tel', ...)
>
> Of course it would be impossible for the function written as above to
> name the class in a user-meaningful way.  The recipe you refer to does
> not face this problem because it is not a method to quickly create a
> new class, it is merely a class whose __init__ method allows you to
> initialise some attribute at instance-creation time.
>
> As for the quotes around the attribute names, well... Let's say that
> if it was possible to do without, I don't think I would be using
> python...
>
> --
> Arnaud



This is the closest we got so far to the intended result.
If there was a way to enter attributes without quotes, it would be
almost identical.
Anyway, I wonder if the code comparison in www.rubuclr.com between the
c# and ruby code is fair...
As far as I know, classes and structs are not the same thing.
In the case of that ruby example, can someone add methods later?

Luis




From __peter__ at web.de  Fri Mar  2 06:15:10 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Mar 2007 12:15:10 +0100
Subject: float64 print digits
References: <mailman.4601.1172832473.32031.python-list@python.org>
Message-ID: <es90t3$1u7$03$1@news.t-online.com>

Ulrich Dorda wrote:

[Warning: I'm no expert and don't have numpy installed]

> I need a pytho nscript to read numbers(with loads of digits) from a
> file, do some basic math on it and write the result out to another file.
> 
> My problem: I don't get python to use more digits:
> 
> In order to try this I type:
> 
> The normal precision one:
>  >>> from numpy import *
>  >>> x=1.23456789123456789123456789
>  >>> print "%35.25e" %x
>     1.2345678912345679000000000e+000
> 
> 
>     Now I try to use float64 to get more digits
> 
>  >>> z=zeros(3,float64)
>  >>> z[0]
> 0.0
>  >>> type(z[0])
> <type 'numpy.float64'>
>  >>> z[0]=1.23456789123456789123456789

The right side of the assignment is a float, so the extra digits would
already be lost before you get a chance to convert to float64. But then
Python's float is a C double and should already use 64 bits...


>  >>> type(z[0])
> <type 'numpy.float64'>
>  >>> print "%35.25e" %z[0]
>     1.2345678912345679000000000e+000
> 
> This cuts the digits just like the 32bit case.
> 
> Can anyone please help me get more digits?

gmpy?

Peter


From pibizza at gmail.com  Wed Mar 14 10:14:11 2007
From: pibizza at gmail.com (PaoloB)
Date: 14 Mar 2007 07:14:11 -0700
Subject: Mocking OpenOffice in python?
In-Reply-To: <mailman.5083.1173881058.32031.python-list@python.org>
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
	<1173880102.3459.26.camel@dot.uniqsys.com>
	<mailman.5083.1173881058.32031.python-list@python.org>
Message-ID: <1173881651.879253.206580@p15g2000hsd.googlegroups.com>

On 14 Mar, 14:52, Shane Geiger <sgei... at ncee.net> wrote:
> My take was that this is an effort to manipulate these files without the
> need for Open Office, so I replied as follows:
>
> Open Office files (.ods and perhaps .odt) are just zipped or gzipped.
> Unpack that and then you are dealing with manipulating regular text
> files--probably HTML.

No.

What I was trying was to build a fake OpenOffice server, so that we
could interact with a fake OpenOffice during our unit test. As
OpenOffice is quite slow, this could improve the performance of our
unit tests.

However, your suggestion is interesting.

Ciao

PaoloB



From bblais at bryant.edu  Mon Mar  5 08:33:27 2007
From: bblais at bryant.edu (Brian Blais)
Date: Mon, 05 Mar 2007 08:33:27 -0500
Subject: CherryPy + Database questions
Message-ID: <45EC1C27.3090106@bryant.edu>

Hello,

I have more of a conceptual question about the way databases work, in a web 
framework, but I will be implementing things with CherryPy and SQLAlchemy.  If you 
make a web form that adds rows to a database, and use sqlite as the engine, is there 
a danger of a race condition if several users at the same time try to submit the 
form?  I want a unique row id, and make a unique identifier for the submissions.  Am 
I in danger of having multiple submissions given the same identifier?

I know that if I implemented things without a database, but used a flat file or 
something like it, I would have that possibility, when two processes try to read and 
update the file at the same time.

If you want something more specific, I can throw some code together, but I wanted to 
get an answer before that because it will change the way I develop the code.


		thanks,

			Brian Blais

-- 
-----------------

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From exarkun at divmod.com  Thu Mar  1 09:20:05 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 1 Mar 2007 09:20:05 -0500
Subject: How to update DNS record
In-Reply-To: <1172751262.972242.215990@p10g2000cwp.googlegroups.com>
Message-ID: <20070301142005.17852.868262670.divmod.quotient.1386@ohm>

On 1 Mar 2007 04:14:23 -0800, andi.clemens at gmx.net wrote:
>On Mar 1, 10:33 am, Bjoern Schliessmann <usenet-
>mail-0306.20.chr0n... at spamgourmet.com> wrote:
>> Read RFC 2136 (Dynamic updates in the DNS) and see if your server
>> can be configured to do this. If not, you'll have to change the
>> zone files manually and reload the DNS config.
>
>It worked before with a perl script, but now I'm using django for all
>our web services so I want to implement this update function in Python
>as well.
>I don't know how to do this in Python, right now I'm trying it with
>twisted, but I don't what to do exactly. It would be nice if somebody
>has an example for doing this.
>

You need to provide more details.  There is no one way to change the
configuration of a DNS server.  Different servers have different features
and different interfaces.  A start would be to specify which DNS server
software needs to be reconfigured.  You might also want to include an example
of what kind of change you want to make.  For example, do you want to add
and delete records?  Do you want to change the address of associated with
an existing A record?  Are all your changes in a single zone?  etc.

Jean-Paul


From sreisscruz at gmail.com  Tue Mar 13 14:53:24 2007
From: sreisscruz at gmail.com (Steve)
Date: 13 Mar 2007 11:53:24 -0700
Subject: Setting Up SOAPpy for Python v2.5 on Windows?
Message-ID: <1173812004.428519.195560@s48g2000cws.googlegroups.com>

Hi All,

What are the required version of the SOAPpy, PyXML, fpconst that are
needed to run under the Python 2.5 environment on Windows?

Locations for the downloads?

Thanks!

Steve



From kyosohma at gmail.com  Mon Mar 26 13:37:21 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 10:37:21 -0700
Subject: how to abort on syntax errors
In-Reply-To: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <1174930640.724685.72160@y80g2000hsf.googlegroups.com>

On Mar 26, 12:21 pm, "Josh" <n... at nowhere.com> wrote:
> I have a lot of except Exception, e statements in my code, which poses some
> problems. One of the biggest is whenever I refactor even the triviallest
> thing in my code.
>
> I would like python to abort, almost as if it were a compile-time error,
> whenever it cannot find a function, or if I introduced a syntax error. But,
> instead, it merrily proceeds on its way.
>
> Is there some idiom that you use in situations like these?
> thanks,
> josh

Try sticking in an

try:
  #do something
except SyntaxError, e:
   print e
   sys.exit(0)
except Exception, e:
   print e


# You put in as many exceptions as you like.

Mike



From NunezD at gmail.com  Thu Mar 15 23:56:02 2007
From: NunezD at gmail.com (hiro)
Date: 15 Mar 2007 20:56:02 -0700
Subject: python noob, multiple file i/o
Message-ID: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>

Hi there,

I'm very new to python, the problem I need to solve is whats the "best/
simplest/cleanest" way to read in multiple files (ascii), do stuff to
them, and write them out(ascii).

--
import os

filePath = ('O:/spam/eggs/')
for file in os.listdir(filePath):   #straight from docs
    # iterate the function through all the files in the directory
    # write results to separate files  <- this is where I'm mostly
stuck.

--
For clarity's sake, the file naming conventions for the files I'm
reading from are file.1.txt -> file.nth.txt

It's been a long day, i'm at my wits end, so I apologize in advance if
I'm not making much sense here.
syntax would also be great if you can share some recipes.

Thanks in advance.

h.



From codecraig at gmail.com  Fri Mar  2 13:01:51 2007
From: codecraig at gmail.com (abcd)
Date: 2 Mar 2007 10:01:51 -0800
Subject: pyHook or SetWindowsHookEx
In-Reply-To: <1172684780.613003.30350@z35g2000cwz.googlegroups.com>
References: <1172584873.585035.319570@m58g2000cwm.googlegroups.com>
	<1172684780.613003.30350@z35g2000cwz.googlegroups.com>
Message-ID: <1172858511.262384.121670@j27g2000cwj.googlegroups.com>

:(



From soyrush at gmail.com  Sat Mar 24 19:42:50 2007
From: soyrush at gmail.com (Rodrigo Lopez-Negrete)
Date: 24 Mar 2007 16:42:50 -0700
Subject: "persistent" plot windows
Message-ID: <1174779770.134013.256280@b75g2000hsg.googlegroups.com>

Hi all,

I'm trying to write a python script using plotting form pylab.
Unfortunatelly I've encountered a problem. When I run the script via
'python myscript.py' the plot windows open and close very quickly, or
when I added the show() command the shell window was locked until I
closed the figures.

My question is: is there a way to open those windows in the background
without blocking the shell and without running it interactively??
something like gnuplot -persist?

Thanks all,
  Rodrigo Lopez-Negrete



From hg at nospam.org  Tue Mar 27 10:45:11 2007
From: hg at nospam.org (hg)
Date: Tue, 27 Mar 2007 16:45:11 +0200
Subject: socket read timeout
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
	<mailman.5668.1175003334.32031.python-list@python.org>
Message-ID: <VegOh.15507$nh4.13055@newsfe20.lga>

Steve Holden wrote:

> Jarek Zgoda wrote:
>> hg napisa?(a):
>> 
>>> I am looking for the most efficient / cleanest way to implement a socket
>>> read with timeout (Windows mainly but would be great if the same code
>>> worked under *nix)
>> 
>> Did you see http://www.timo-tasi.org/python/timeoutsocket.py ?
>> 
> Note that since 2.4, I believe, sockets in the standard library allow
> you to specify a timeout parameter.
> 
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb     http://del.icio.us/steve.holden
> Recent Ramblings       http://holdenweb.blogspot.com

Hi and thanks to all.

Do you mean use select ?

Thanks,

hg



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 18:21:44 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 20:21:44 -0300
Subject: Calling a function with unknown arguments?
References: <1173308108.239943.174560@j27g2000cwj.googlegroups.com>
Message-ID: <op.touduik0x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 19:55:08 -0300, Rob <crowell at mit.edu> escribi?:

> I can get a list of a function's arguments.
>>>> def bob(a, b):
> ...     return a+b
> ...
>>>> bob.func_code.co_varnames
> ('a', 'b')
>
> Let's say that I also have a dictionary of possible arguments for this
> function.
>>>> possible = {'a':10, 'b':5, 'c':-3}
>
> How do I proceed to call bob(a=10, b=5) with this information?

You're almost done. Notice that co_varnames includes local variables too;  
only the first co_argcount are positional arguments.
If you only want to deal with positional arguments (no *args, no **kw):

py> def bob(a,b):
...   c = a+b
...   return c
...
py> bob.func_code.co_varnames
('a', 'b', 'c')
py> bob.func_code.co_argcount
2
py> args = dict((name, possible[name]) for name in  
bob.func_code.co_varnames[:bo
b.func_code.co_argcount] if name in possible)
py> args
{'a': 10, 'b': 5}
py> bob(**args)
15

It can handle missing arguments (if they have a default value, of course):

py> def bob(a, k=3):
...   return a+k
...
py> args = dict((name, possible[name]) for name in  
bob.func_code.co_varnames[:bo
b.func_code.co_argcount] if name in possible)
py> args
{'a': 10}
py> bob(**args)
13

-- 
Gabriel Genellina



From anton.vredegoor at gmail.com  Wed Mar 14 12:24:16 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Wed, 14 Mar 2007 17:24:16 +0100
Subject: number generator
In-Reply-To: <7xps7bbz8g.fsf@ruckus.brouhaha.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<1173861843.878008.83090@p15g2000hsd.googlegroups.com>
	<7xps7bbz8g.fsf@ruckus.brouhaha.com>
Message-ID: <et9cji$bfs$2@news4.zwoll1.ov.home.nl>

Paul Rubin wrote:

>> def genpool(n, m):
>>     if n == 1:
>>         yield [m]
>>     else:
>>         for i in xrange(1, m):
>>             for rest in genpool(n-1, m-i):
>>                 yield rest + [i]
>>
>> import random
>> print random.choice(list(genpool(n=4, m=20)))
> 
> This generates a lot of the partitions more than once, with
> possibly unequal probability.

Well, I just noticed that with my memoization function it produces too 
little :-(

But I hope you notice that this function doesn't create only partitions 
but all possible outcomes?

A.


From mccredie at gmail.com  Thu Mar 15 19:22:32 2007
From: mccredie at gmail.com (Matimus)
Date: 15 Mar 2007 16:22:32 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
Message-ID: <1174000951.999433.149760@n59g2000hsh.googlegroups.com>

> Any ideas to speed it up say 10 times? Or the problem only for C-like
> langs?

I dout this will speed it up by a factor of 10, but in your solution
you are mapping the values in the input file to longs. The problem
statement states that the maximum value for any of the numbers is
2**28. I assume the reason for this is precisely to allow you to use
32-bit integers. So, you can safely use int instead, and it _might_
speed up a little.



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  8 15:23:15 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 21:23:15 +0100
Subject: Where to "import"?
In-Reply-To: <1173379952.901004@iceman.esoterica.pt>
References: <1173379952.901004@iceman.esoterica.pt>
Message-ID: <45f068a2$0$18256$426a74cc@news.free.fr>

Paulo da Silva a ?crit :
> Hi!
> 
> If I have two files .py such as
> 
> m.py
> 	from c import *

avoid this kind of import except in an interactive interpreter and 
eventually in a package __init__.py. Better to use either:

   from c import c
or
   import c
   ...
   x = c.c()

> 	...
> 	x=c()
> 	...
> 	os.any_method ...

Then you need to import os

> 	...
> 
> c.py
> 	class c:
         class C(object):

1/ better to stick to naming conventions (class names in CamelCase)
2/ do yourself a favor: use new-style classes

> 		def __init__(self, ...):
> 			...
> 			os.any_method ...
> 			...
> 	...
> 
> both using os module where should I put the "import os"? In both files?

Yes. In your above example, it worked because of the "from c import *" - 
and this is exactly why it's bad form to use this in a module (well: 
that's one of the reasons why). Each module should *explicitly* import 
all it's direct dependencies.



From johnpenk7 at yahoo.com  Mon Mar 26 12:35:51 2007
From: johnpenk7 at yahoo.com (jp)
Date: 26 Mar 2007 09:35:51 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174926471.899631.228810@e65g2000hsc.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
Message-ID: <1174926951.133085.294900@l75g2000hse.googlegroups.com>

On Mar 26, 11:27 am, kyoso... at gmail.com wrote:
> On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
>
> > On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > > I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> > > I skip over these widgets when using the tab key?
>
> > > Thank you,
> > > John
>
> > I would probably write some custom event handling. Something that
> > could tell it was a key-press event and not just an on-focus event.
> > Then it would be a simple, if key-press == tab, put focus on next
#> > widget of interest. Something like that should work.
>
> > Mike
>
> I looked in my Tkinter book, and it says that if the widget has the
> "takefocus" option set to true, the widget is placed in the tab group
> and will get focus when they are tabbed to. I assume that this means
> if you set the PMW widgets' "takefocus" option to false, they will be
> skipped over since they won't be in the tab group.
>
> Mike

I've tried using the takefocus option set to 0 and 1 but either way,
the tab key still stops at my EntryField.  Below is my snippet of
code.  What am I doing wrong?

entry=Pmw.EntryField(frame,
                     labelpos = 'w',
                     value = "",
                     label_text =
'Name:')
entry.grid(row=1)
#entry.component('entry').takefocus = 1
entry.component('entry').takefocus = 0



From bbxx789_05ss at yahoo.com  Fri Mar 16 15:15:33 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 12:15:33 -0700
Subject: TypeError: 'module' object is not callable
In-Reply-To: <1174066969.563803.216040@p15g2000hsd.googlegroups.com>
References: <1174066969.563803.216040@p15g2000hsd.googlegroups.com>
Message-ID: <1174072533.834956.46310@b75g2000hsg.googlegroups.com>

Hi,

I can't find any documentation on the profile() function.  But it
might take a function reference as an argument and not the string you
are feeding it.  For instance:

profile(t.printworld)

Note the difference between:

t.printworld
t.printworld()

The latter executes the function and then replaces the function call
with the return value of the function.



From skip at pobox.com  Sun Mar  4 16:38:57 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 4 Mar 2007 15:38:57 -0600
Subject: identifying modules to be built and not
Message-ID: <17899.15473.620236.302603@montanaro.dyndns.org>


The thread John Nagle started about building Python 2.5 on Fedora Core 6 led
me to implement a slight change to Python's setup.py.  You clearly can't
have the build stop if the bits needed to build a particular module aren't
found or if compiling a module fails, but it's fairly straightforward to
note which modules could be built and which can't be.  There's a patch for
setup.py on SourceForge you can try if you want:

    http://python.org/sf/1673619

When setup.py is run it emits output like this after checking for modules it
knows how to build (this is from my Mac):

    Located the necessary bits to build these modules:
    _AE               _AH               _App           
    _bisect           _bsddb            _CarbonEvt     
    _CF               _CG               _Cm            
    _codecs_cn        _codecs_hk        _codecs_iso2022
    _codecs_jp        _codecs_kr        _codecs_tw     
    _collections      _csv              _Ctl           
    _ctypes           _ctypes_test      _curses        
    _curses_panel     _Dlg              _Drag          
    _elementtree      _Evt              _File          
    _Fm               _Folder           _functools     
    _hashlib          _heapq            _Help          
    _hotshot          _IBCarbon         _Icn           
    _Launch           _List             _locale        
    _lsprof           _Menu             _Mlte          
    _multibytecodec   _OSA              _Qd            
    _Qdoffs           _Qt               _random        
    _Res              _Scrap            _Snd           
    _socket           _sqlite3          _ssl           
    _struct           _TE               _testcapi      
    _tkinter          _weakref          _Win           
    array             audioop           autoGIL        
    binascii          bsddb185          bz2            
    cmath             ColorPicker       cPickle        
    crypt             cStringIO         datetime       
    dbm               dl                fcntl          
    gestalt           grp               icglue         
    imageop           itertools         MacOS          
    math              mmap              Nav            
    nis               operator          OSATerminology 
    parser            pwd               pyexpat        
    readline          resource          rgbimg         
    select            strop             syslog         
    termios           time              unicodedata    

    Failed to find the necessary bits to build these modules:
    _elementtree      _md5              _sha           
    _sha256           _sha512           gdbm           
    linuxaudiodev     ossaudiodev       spwd           

Feel free to add comments to the above patch page.  It will help the
development team decide whether or not it's a worthwhile addition.

Skip


From yinglcs at gmail.com  Thu Mar 22 14:43:36 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 22 Mar 2007 11:43:36 -0700
Subject: How can I tar each sub-directories inside a directory
Message-ID: <1174589016.152380.161990@n76g2000hsh.googlegroups.com>

Hi,
how can I do
* for each sub-directory of  the current directory
* tar that to a tar file
* remove that sub-directory



From gigs at hi.t-com.hr  Tue Mar 20 12:46:05 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 20 Mar 2007 17:46:05 +0100
Subject: P: maticna graficka monitor
In-Reply-To: <etp33d$gcf$1@ss408.t-com.hr>
References: <etp33d$gcf$1@ss408.t-com.hr>
Message-ID: <etp34f$gcf$2@ss408.t-com.hr>

Gigs_ wrote:
> prodajem:
> 
> maticnu sapphire am2rd580adv, pola god stara, pod garancijom -> 700kn
> 
> graficku sapphire x1650 pro 256 mb pola god start pod garancijom -> 600kn
> 
> monitor philips 190p6es brilliance (kostao 4.100), star 1.5 godinu 
> garancija vrijedi jos 1.5 godinu -> 2000kn


sorry wrong group


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 10:39:49 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 15:39:49 +0100
Subject: Still the __new__ hell ...
In-Reply-To: <mailman.5278.1174308102.32031.python-list@python.org>
References: <mailman.5278.1174308102.32031.python-list@python.org>
Message-ID: <45fea0b3$0$15544$426a74cc@news.free.fr>

Jean-Paul Calderone a ?crit :
> On Mon, 19 Mar 2007 13:17:11 +0100, Bruno Desthuilliers
>>
>> [snip]
>>
>> And what if it's a unicode string ?
>> The correct idiom here is:
>>                  if isinstance(year, basestring):
>>
>>>             year,month,day=map(int,string.split(year,'-'))
>>                         year, month, day = map(int, year.split('-'))
> 
> And what if it's another kind of string?

One that doesn't inherit from basestring ?

>  The correct idiom is:
> 
>   try:
>       parts = year.split('-')
>   except AttributeError:
>       # Handle int case
>   else:
>       year, month, day = map(int, parts)
> 
>>
>>>         if year < 100:
>>>             year += 2000
>>>         return date.__new__(cls,year,month,day)
>>>

And what if it's an object that has nothing to do with a string but 
happens to have a split() method ?-)

>> (snip)

Jean-Paul, you're of course right from a theoretical POV. Practically 
speaking, chances that such a method will ever be fed with a string-like 
object not deriving from basestring are IMVHO *very* low. While I 
usually raise a big warning flag when I spot a test against 
isinstance(), I'd say this is an example of the few cases where it's ok. 
  YMMV of course...


From bj_666 at gmx.net  Thu Mar  1 17:11:26 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 01 Mar 2007 23:11:26 +0100
Subject: Unpacking problem
References: <1172783865.479377.42790@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.01.22.11.25.463928@gmx.net>

In <1172783865.479377.42790 at h3g2000cwc.googlegroups.com>, Chris Garland
wrote:

> But an unsigned char & a short give me this
>>>> unpack('Bh','\x90\x06\x00')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> struct.error: unpack str size does not match format

Let's pack this:

In [90]: pack('Bh', 0x90, 0x6)
Out[90]: '\x90\x00\x06\x00'

Per default the values are (un)packed with the preferred alignment of the
C compiler, so here is an extra byte to place the short at an even
address.  If you give the endianess in the format string there's no
padding:

In [91]: pack('<Bh', 0x90, 0x6)
Out[91]: '\x90\x06\x00'

Ciao,
	Marc 'BlackJack' Rintsch


From mikael at isy.liu.se  Thu Mar  8 11:27:19 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Thu, 08 Mar 2007 17:27:19 +0100
Subject: Tell me the truth
In-Reply-To: <OFA0A2DBF6.794F6BB0-ONC1257298.00415F42-C1257298.0053864B@bureauveritas.com>
References: <OFA0A2DBF6.794F6BB0-ONC1257298.00415F42-C1257298.0053864B@bureauveritas.com>
Message-ID: <45F03967.9020309@isy.liu.se>



francois.petitjean at bureauveritas.com wrote:
> If I take into account the fact that 'True' and 'False' are singletons
> (guaranteed ?) :
>  (not not x) is bool(x)  # should be always True.
> [snip code and results of code]
>   
Consider the following:

 >>> def ok1(x):
    return (not not x) is bool(x)

 >>> def ok2(x):
    return (not not x) is bool(x) is True

 >>> def ok3(x):
    return ok1(x) is True

 >>> def ok4(x):
    return ((not not x) is bool(x)) is True

 >>> def ok5(x):
    return ((not not x) is bool(x)) and (bool(x) is True)

 >>> for x in [False, True]:
    print x,ok1(x), ok2(x), ok3(x), ok4(x), ok5(x)

   
False True False True True False
True True True True True True

Note that ok2(x) and ok5(x) exhibit the same behaviour.

HTH
/MiO


From chimalus at gmail.com  Fri Mar 30 21:17:19 2007
From: chimalus at gmail.com (jd)
Date: 30 Mar 2007 18:17:19 -0700
Subject: clean up html document created by Word
In-Reply-To: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
Message-ID: <1175303839.299837.260780@e65g2000hsc.googlegroups.com>

Wow, thanks for all the great responses!

Here's my summary:

- demoronizer (from John Walker) is designed to solve some very
particular problems that could be considered bugs.  However, it
doesn't remove the  unnecessary html generated by Word.
http://www.fourmilab.ch/webtools/demoroniser/


- The tool from Microsoft can be used in two ways: you can copy html
to the clipboard or export to "compact html".  The former results in
slightly cleaner html but doesn't include the style sheet and so the
rendering isn't as nice; the latter does include the style sheet but
it's got slightly more junk in it.  Both approaches preserve the
"blank" paragraphs (basically, <p>&nbsp;</p>) for spacing, which is
unnecessary and clutters up the html. This tool did properly preserve
the footnotes in my test document.
http://www.microsoft.com/downloads/details.aspx?FamilyID=209ADBEE-3FBD-482C-83B0-96FB79B74DED&displaylang=EN

BTW, I didn't know this, but much of the extra html was added by
Microsoft to allow round-tripping between html and Word.

- Tidy with Win2000 configuration: It's already bundled in with my
editor (PSPad) so this was a nice surprise (I guess I never explored
that submenu -- that's the "problem" with modern editors and their
zillions of features).  The tidy output could use a more whitespace to
improve html readability, but I assume I can change the config file to
do this.  No "blank paragraphs" (better than the Microsoft tool) but
footnotes were messed up.
http://www.w3.org/People/Raggett/tidy/

-- jeff



From rdm at rcblue.com  Sat Mar 17 03:51:13 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 17 Mar 2007 00:51:13 -0700
Subject: Weekly Python Patch/Bug Summary
In-Reply-To: <200703170454.l2H4skKe003172@bayview.thirdcreek.com>
References: <200703170454.l2H4skKe003172@bayview.thirdcreek.com>
Message-ID: <20070317075121.565D11E4005@bag.python.org>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070317/2609bf9a/attachment.html>

From gagsl-py2 at yahoo.com.ar  Tue Mar  6 01:38:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 Mar 2007 03:38:56 -0300
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
References: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>
Message-ID: <op.toq8q6gsx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 03:18:23 -0300, seberino at spawar.navy.mil  
<seberino at spawar.navy.mil> escribi?:

> The following web page puts a report in a *popup window* by clicking
> the "Generate Report" button....
>
> http://moneycentral.msn.com/investor/research/printrep.asp?Symbol=BBBY
>
> How can I grab this pop window page in a python script? (It doesn't
> seem to have a URL!?!)

Of course it has:
http://moneycentral.msn.com/investor/research/sreport.asp?Symbol=BBBY&Y1=1&CR=1&Type=Equity
If your browser don't let you know the actual URL... try a better browser  
:)

-- 
Gabriel Genellina



From paul.rudin at ntlworld.com  Sat Mar 24 05:12:12 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Sat, 24 Mar 2007 09:12:12 +0000
Subject: execution speed increase after compile py code into exe?
References: <mailman.5544.1174724418.32031.python-list@python.org>
Message-ID: <871wjfyphv.fsf@rudin.co.uk>

Kelie <kf9150 at gmail.com> writes:

> hello,
>
> would there be any speed increase in code execution after python code being
> compiled into exe file with py2exe?

AIUI that's not what p2yexe is about - it's essentially about
packaging up your python program for ease of distribution and
installation on windows boxes.

However, you might find that you can get significant speed-ups by
using psyco <http://psyco.sourceforge.net/>, on x386 type hardware at
least.




From attn.steven.kuo at gmail.com  Fri Mar  2 10:22:05 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 2 Mar 2007 07:22:05 -0800
Subject: Matplotlib axes label
In-Reply-To: <1172847759.727020.281300@p10g2000cwp.googlegroups.com>
References: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>
	<1172814815.385543.180040@j27g2000cwj.googlegroups.com>
	<1172815638.950663.198040@t69g2000cwt.googlegroups.com>
	<1172847759.727020.281300@p10g2000cwp.googlegroups.com>
Message-ID: <1172848925.223085.277440@n33g2000cwc.googlegroups.com>

On Mar 2, 7:02 am, "John Henry" <john106he... at hotmail.com> wrote:
> On Mar 1, 10:07 pm, "John Henry" <john106he... at hotmail.com> wrote:
>
>
>
> > On Mar 1, 9:53 pm, attn.steven.... at gmail.com wrote:
>

(snipped)

> > > You can try adjusting the labels and ticks
> > > using matplotlib.ticker.
>
> > > To the example you cited, one can add
>
> > > from matplotlib.ticker import MultipleLocator, FormatStrFormatter
>
> > > # ...
>
> > > minorLocator = MultipleLocator(0.1)
> > > minorFormattor = FormatStrFormatter('%0.1f')
> > > ax.yaxis.set_minor_locator(minorLocator)
> > > ax.yaxis.set_minor_formatter(minorFormattor)
>
> > > show()
>
>
> > Thank you for the response.  Yes, adding those lines did work.
>
> > But what exactly is going on here?  Why would adding these two lines
> > works?
>
> > Thanks,
>
> Okay, I played with the ticker formater and locator routines.
> Unfortunately, it doesn't help.  The locator sets the major value and
> the formatter determines how the axes label is formatted.  It doesn't
> gurantee that the first label starts at the origin.  Half of my plots
> works, and half of them doesn't.





As default, matplotlib places labels and tick marks
at major ticks.  Minor ticks are invisible as
a default.

The lines that I added turned on *minor*
ticks and their labels; I set them to appear
at integer multiples of 0.1 and I
formatted them as floating point numbers.

There's nothing to prevent you from
having minor ticks appear at intervals
that exceed those of major ticks.  E.g.,

minorLocator = MultipleLocator(1.1)

# etc.

--
Hope this helps,
Steven



From grflanagan at yahoo.co.uk  Tue Mar 13 10:30:01 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 13 Mar 2007 07:30:01 -0700
Subject: most complete xml package for Python?
In-Reply-To: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
Message-ID: <1173796201.779457.202610@h3g2000cwc.googlegroups.com>

On Mar 13, 1:43 pm, "metaperl" <metap... at gmail.com> wrote:
> Without even checking them all out, I'm thinking the Amara XML Toolkit
> must be the most feature-packed. The developers are readily available
> on IRC for support and they seem to make regular releases.
>
> As a meld3 user, I have been using ElementTree under the hood, but was
> dismayed to find out that you can't find elements by attribute and I
> am finding it difficult to remove elements.

Hardly in competition with Amara or lxml, but I wrote this extension
to ElementTree which handles attributes to a limited extent:

    http://gflanagan.net/site/python/utils/elementfilter/

(Be aware that parts of the filter string are 'eval-ed')

Gerard




From fd.calabrese at gmail.com  Fri Mar  9 10:17:13 2007
From: fd.calabrese at gmail.com (cesco)
Date: 9 Mar 2007 07:17:13 -0800
Subject: number generator
In-Reply-To: <7x7itqqxlh.fsf@ruckus.brouhaha.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
Message-ID: <1173453432.893222.308610@j27g2000cwj.googlegroups.com>

On Mar 9, 3:51 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "cesco" <fd.calabr... at gmail.com> writes:
> > I have to generate a list of N random numbers (integer) whose sum is
> > equal to M. If, for example, I have to generate 5 random numbers whose
> > sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> > simple pattern or function in Python to accomplish that?
>
> Erm, yes, lots of ways, there are probably further constraints on the
> problem, such as the size of the integers, how the lists are supposed
> to be distributed, etc.  Can you be more specific?  Is this for an
> application?  If it's a homework problem, that's fine, but it's better
> in that case for respondents to suggest hints rather than full solutions.

Given two positive integers, N and M with N < M, I have to generate N
positive integers such that sum(N)=M. No more constraints.

Thanks again
Francesco



From lligo at icm.edu.pl  Tue Mar 13 18:25:03 2007
From: lligo at icm.edu.pl (=?utf-8?q?=C5=81ukasz_Ligowski?=)
Date: Tue, 13 Mar 2007 23:25:03 +0100
Subject: Iterating across a filtered list
In-Reply-To: <1173820592.220605.64040@l77g2000hsb.googlegroups.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<mailman.5035.1173819607.32031.python-list@python.org>
	<1173820592.220605.64040@l77g2000hsb.googlegroups.com>
Message-ID: <200703132325.04130.lligo@icm.edu.pl>

Hi,

On Tuesday 13 of March 2007 22:16:32 Arnaud Delobelle wrote:

> for x in L:
>     if g(x):
>         do stuff with f(x)

for x in itertools.ifilterfalse(g, L):
	do stuff

Maybe this would be even better?

L


From duncan.booth at invalid.invalid  Mon Mar  5 10:33:25 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Mar 2007 15:33:25 GMT
Subject: Dictionary of Dictionaries
References: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
	<1173104962.782667.50760@j27g2000cwj.googlegroups.com>
Message-ID: <Xns98EA9D0E73460duncanbooth@127.0.0.1>

"Bart Ogryczak" <B.Ogryczak at gmail.com> wrote:

> On Mar 5, 11:22 am, b... at yahoo.com wrote:
>> messagesReceived = dict.fromkeys(("one","two"), {})
> 
> This creates two references to just *one* instance of empty
> dictionary.
> I'd do it like:
> messagesReceived = dict([(key, {}) for key in ("one","two")])
> 
Alternatively use a defaultdict (Python 2.5) and you don't need to know the 
keys in advance:

>>> from collections import defaultdict
>>> messagesReceived = defaultdict(dict)
>>> messagesReceived['one']['123'] = 11111
>>> messagesReceived['two']['121'] = 22222
>>> messagesReceived['two']['124'] = 43333
>>> messagesReceived
defaultdict(<type 'dict'>, {'two': {'121': 22222, '124': 43333}, 'one': 
{'123': 11111}})



From steven.bethard at gmail.com  Fri Mar 16 11:37:28 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 16 Mar 2007 09:37:28 -0600
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <pan.2007.03.16.08.18.32.205449@gmx.net>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<7x6491k9t3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.16.08.18.32.205449@gmx.net>
Message-ID: <xoednQr6GoIkJGfYnZ2dnUVZ_o7inZ2d@comcast.com>

Marc 'BlackJack' Rintsch wrote:
> In <7x6491k9t3.fsf at ruckus.brouhaha.com>, Paul Rubin wrote:
> 
>> "n00m" <n00m at narod.ru> writes:
>>> h = collections.defaultdict(itertools.repeat(0).next)
>> Something wrong with 
>>    h = collections.defaultdict(int)
>> ?????
> 
> According to a post by Raymond Hettinger it's faster to use that iterator
> instead of `int`.

Yep. It's because the .next() method takes no arguments, while int() 
takes varargs because you can do::

     int('2')
     int('2', 8)

Calling a no-args function is substantially faster than calling a 
varargs function.

STeVe


From lew at nospam.lewscanon.com  Wed Mar 21 15:11:30 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Wed, 21 Mar 2007 15:11:30 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <1174484076.994815.89820@y66g2000hsf.googlegroups.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
Message-ID: <4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>

Dr. Who wrote:
> Don't Feed The Trolls :-)

But, but - you fed me!?

Oh, wait, I'm only a half-troll, on my father's side.

Thanks for the attention.

Kidding aside, a post like the OP's is useful as an exercise in finding the 
errors, grammatical and factual. It's like a math book I had in my first year 
at university. Its theorems were riddled with typographical errors, mixing the 
us, vs and ws all around. I'd be up for hours figuring out if I was wrong or 
the book was wrong. In the end it gave me a lot more exercise than the 
homework problems did.

Also, I wanted to protect the innocent.

We could put up a contest - whoever finds and corrects the most errors in the 
post wins. Ties broken by the quality of the correct explanations. Incorrect 
explanations count against the entry.

-- Lew


From supervau at gmail.com  Tue Mar 13 02:33:43 2007
From: supervau at gmail.com (Frank)
Date: 12 Mar 2007 23:33:43 -0700
Subject: Calling cpp from python/SWIG
Message-ID: <1173767623.632550.148000@64g2000cwx.googlegroups.com>

Hi,

I have the following problem:

I want to parse an array M1 from python to a cpp function fct which
returns an array M2.

How can I do this best? Is SWIG appropriate or is there something
else?

If someone could give some code example or a link to a page with
examples, that would be great!

Thanks to all!

Frank



From fredrik at pythonware.com  Fri Mar 23 09:34:07 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 23 Mar 2007 14:34:07 +0100
Subject: Catching an unknown error
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
	<1174656547.825228.54240@e65g2000hsc.googlegroups.com>
Message-ID: <eu0l0f$b13$1@sea.gmane.org>

kyosohma at gmail.com wrote:

> Make the last 'except' block like this:
>
> Except Exception, e:
>   print e

while that's good enough for the given example, it's not good enough for
the general case (in contemporary Python, exceptions don't have to inherit
from the Exception class).

</F> 





From jstroud at mbi.ucla.edu  Thu Mar  8 06:42:41 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 08 Mar 2007 11:42:41 GMT
Subject: Howto find dict members from a list of keys
In-Reply-To: <mailman.4794.1173345912.32031.python-list@python.org>
References: <esogs0$41a$1@online.de>	<mailman.4790.1173342408.32031.python-list@python.org>	<pan.2007.03.08.08.37.48.318909@REMOVEME.cybersource.com.au>
	<mailman.4794.1173345912.32031.python-list@python.org>
Message-ID: <RESHh.1235$FG1.333@newssvr27.news.prodigy.net>

Gabriel Genellina wrote:
> En Thu, 08 Mar 2007 05:37:48 -0300, Steven D'Aprano 
> <steve at REMOVEME.cybersource.com.au> escribi?:
> 
>> On Thu, 08 Mar 2007 05:26:22 -0300, Gabriel Genellina wrote:
>>
>>> found_dic_members = [d[key] for key in l]
>>
>> *self stares at the line of code*
>>
>> *self thinks about what he just posted*
>>
>> *self realises with acute embarrassment that he's jumped to conclusions
>> and completely misunderstood the Original Poster's question*
>>
>> Oops! I'll just be slinking away now...
> 
> LOL! :)
> 
> (...now! But when I saw your previous post, I had to check whether it 
> was *me* who misunderstood the OP answering with a silly one-liner...)
> 
> 
> --Gabriel Genellina
> 
I think it was a silly one-liner.

If you look closely at the example, the only mapping of

[7, 8] ==> [8, 9]

is

[key, key] ==> [value, value]

Look again at the example and consider the positional relationships.

The answer, then, is trivial if not silly:

    [d[k] for k in l]

It doesn't appear he as asking for the interesting case:

[value, value] ==> [key, key]

Its easy to see how Gabriel was thrown for a loop on this one.

James


From steve at holdenweb.com  Mon Mar 19 13:19:50 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 13:19:50 -0400
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <45fe89d4$0$24787$426a34cc@news.free.fr>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<45fe89d4$0$24787$426a34cc@news.free.fr>
Message-ID: <etmgq9$mep$1@sea.gmane.org>

Bruno Desthuilliers wrote:
> Diez B. Roggisch a ?crit :
>> momobear schrieb:
>>> hi, I am puzzled about how to determine whether an object is
>>> initilized in one class, anyone could give me any instructions?
>>> here is an example code:
>>>
>>> class coffee:
>>>          def  boil(self):
>>>                self.temp = 80
>>>
>>> a = coffer()
>>> if a.temp > 60:
>>>      print "it's boiled"
>>>
>>> in C++ language we must initilized a variable first, so there is no
>>> such problem, but in python if we don't invoke a.boil(), we will not
>>> get self.temp to be initilized, any way to determine if it's initilzed
>>> before self.temp be used.
>> You want boil to be called __init__, which is python's constructor name. 
> 
> <nitpicking>
> Actually, __init__ is the initializer. The proper constructor is __new__.
> </nitpicking>
> 
<nitpicking severity="be-kind-to-novices">
Actually you would have to ensure that the class's metaclass was <type 
"type"> for that to be true. Classic classes don't *have* a __new__ method.
</nitpicking>

And of course the real answer is that the __init__ method should set a 
default value (modulo the sneaky use of class attributes) for any 
attributes that might be accessed before other methods get a chance to 
set them.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From ptmcg at austin.rr.com  Fri Mar 16 17:34:31 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Mar 2007 14:34:31 -0700
Subject: How to get the previous line in a file?
In-Reply-To: <mailman.5194.1174078319.32031.python-list@python.org>
References: <882682.16208.qm@web58912.mail.re1.yahoo.com>
	<mailman.5194.1174078319.32031.python-list@python.org>
Message-ID: <1174080870.969335.59100@b75g2000hsg.googlegroups.com>

On Mar 16, 3:51 pm, Shane Geiger <sgei... at ncee.net> wrote:
> lines = open('/tmp/foo.py',
> "r").read().splitlines()                                                                                                    
>
> previous_line =
> ''                                                                                                                                      
>
> for line in
> lines:                                                                                                                                      
>
>     if "foo" in
> line:                                                                                                                                  
>
>         print "found foo in the current line.  The previous line is:  "
> +
> previous_line                                                                
>
>     previous_line =
> line                                                                                                                                
>
>
>
>
>
> Qilong Ren wrote:
> > Hi,all
>
> > I am new to this list. And I am glade I am here.
> > I have a question. I need to do some text processing. I need to read
> > from a file line by line. If some line is met with some condition, the
> > previous line needs some modification. How to get the info of the
> > previous line?
>
> > Thanks!
> > Qilong
>
> > ------------------------------------------------------------------------
> > Never miss an email again!
> > Yahoo! Toolbar
> > <http://us.rd.yahoo.com/evt=49938/*http://tools.search.yahoo.com/toolb...>
> > alerts you the instant new Mail arrives. Check it out.
> > <http://us.rd.yahoo.com/evt=49937/*http://tools.search.yahoo.com/toolb...>
>
> --
> Shane Geiger
> IT Director
> National Council on Economic Education
> sgei... at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> Leading the Campaign for Economic and Financial Literacy
>
>  sgeiger.vcf
> 1KDownload- Hide quoted text -
>
> - Show quoted text -

If the list is not long, zip the lines together in pairs:

lines = """
test1
test2
foo
test3
test4
""".split("\n")

for prev,curr in zip(lines[:-1],lines[1:]):
    if "foo" in curr:
        break
else:
    prev = "<not found>"
print "line before foo is:", prev

prints:
line before foo is: test2

-- Paul



From aspineux at gmail.com  Sat Mar 17 19:59:36 2007
From: aspineux at gmail.com (aspineux)
Date: 17 Mar 2007 16:59:36 -0700
Subject: Automagically log changes in table
In-Reply-To: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
References: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
Message-ID: <1174175976.156270.65830@e1g2000hsg.googlegroups.com>

Hi

You can get this using "triggers" and "stored procedures".
These are SQL engine dependent! This is available for long time with
postgress and only from version 5 with mysql.
This let you write SQL code (Procedure) that will be called when
"trigged" by an event like inserting new row, updating rows,
deleting ....

BR


On 17 mar, 21:43, "George Sakkis" <george.sak... at gmail.com> wrote:
> This is more in the context of Turbogears/SQLAlchemy, but if anyone
> has implemented something similar with other packages it might be
> useful to know.
>
> I'd like to have a way to make a table "loggable", meaning it would
> get, say, two fields "last_modified" and "modified_by", and every
> write operation on it would automatically record the time and the id
> of the user who did the addition or change (I'm not sure how to deal
> with deletions let's leave this for now). Has anyone done something
> like that or knows where to start from ?
>
> George




From aleax at mac.com  Tue Mar 20 22:58:49 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 19:58:49 -0700
Subject: Documentation for "str()" could use some adjustment - Unicode
	issue
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
	<mailman.5276.1174294980.32031.python-list@python.org>
	<DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>
	<1hv8tz5.l61xmz1mtprhiN%aleax@mac.com>
	<fRWLh.46$rO7.22@newssvr25.news.prodigy.net>
Message-ID: <1hvahxv.1pih2eo19v33reN%aleax@mac.com>

John Nagle <nagle at animats.com> wrote:
   ...
> > Are you looking at p. 109 of the 2nd edition of the Nutshell? 
> 
>     No, I'm looking at the original edition from 2003.  That
> was what Borders had in stock late last year.

Eeek -- the 2nd edition came out in July 2006, and several months later
Borders were STILL stocking the older, long-out-of-print one?!

I occasionally checked this summer and the Palo Alto and Sunnyvale
locations of Borders did seem to upgrade reasonably fast -- but maybe
that's just a Silicon Valley thing...?


Alex


From bbxx789_05ss at yahoo.com  Mon Mar 19 13:21:42 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 19 Mar 2007 10:21:42 -0700
Subject: class objects, method objects, function objects
In-Reply-To: <mailman.5281.1174315662.32031.python-list@python.org>
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
	<mailman.5281.1174315662.32031.python-list@python.org>
Message-ID: <1174324902.778062.104610@b75g2000hsg.googlegroups.com>

Hi,

Thanks for the responses.  I understand that python automatically
sends 'self' to a member function, i.e. self gets prepended to the
argument list.  I guess I am having trouble with this statement:
----
When the method object is called with an
argument list, it is unpacked again, a new argument list is
constructed from the instance object and the original argument list,
and the function object is called with this new argument list.
---
because I don't quite understand the timing.  The "unpacked again"
part confuses me. If I have this code:

class MyClass:
        def g(self, name):
                print "Hello " + name

x = MyClass()
x.g("GvR")

here is what happens when I try to follow the sequence of events GvR
describes:
----------------
When an instance attribute is referenced that isn't a data attribute,
its class is searched.

x.g("GvR") ==> 'g' is not a data attribute, so class is searched.

If the name denotes a valid class attribute that is a function object,
a
method object is created by packing (pointers to) the instance object
and the function object just found together in an abstract object:
this is the method object.

==>method object is created

When the method object is called with an
argument list,

x.g("GvR") ==> I think I'm both "referencing an instance attribute"
and calling the method object with an argument list

it(the method object) is unpacked again, a new argument list is
constructed from the instance object and the original argument list,
and the function object is called with this new argument list.

??



From gagsl-py2 at yahoo.com.ar  Tue Mar 13 16:16:34 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 17:16:34 -0300
Subject: httplib/socket problems reading 404 Not Found response
References: <1173755273.697153.97270@64g2000cwx.googlegroups.com>
	<mailman.4994.1173757609.32031.python-list@python.org>
	<1173793104.358361.137130@30g2000cwc.googlegroups.com>
Message-ID: <op.to489wamx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 10:38:24 -0300, Patrick Altman <paltman at gmail.com>  
escribi?:

>> Yes, it's a known problem. See this message with a  
>> self-response:http://mail.python.org/pipermail/python-list/2006-March/375087.html

> Are there plans to include this fix in the standard Python libraries
> or must I make the modifications myself (I'm running Python 2.5)?

Submit a bug report, if not already done.
http://sourceforge.net/tracker/?group_id=5470

-- 
Gabriel Genellina



From jstroud at mbi.ucla.edu  Thu Mar 22 23:00:34 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 22 Mar 2007 20:00:34 -0700
Subject: My MVC critique
In-Reply-To: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
References: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
Message-ID: <etvfsi$bdp$1@daisy.noc.ucla.edu>

scott.w.white at gmail.com wrote:
> Looking at different MVC frameworks from many langauges from PHP to
> Python, I've concluded that the explosion of MVC frameworks is mainly
> due to undisciplined & unexperienced programmers.
> 
> Nobody would argue about the separation of the layers because this is
> not the problem I have with it, if anything most implementations
> emphasis separation at the wrong places.  The end solutions end up
> looking very mickey mouse.
> 
> It's been long asserted starting with Smalltalk there there be a
> separation of layers with an application starting with the view (what
> the user sees), the controller (which controls the flow of the
> application) and the model (the representation of the data).
> 
> What MVC does not emphasis is the separation of the data access layer,
> one of the most important pieces of an application.  So what is done
> with this?  For many the DAL is either encapsulated within the model
> or some toolkit that generates the SQL for them, this may lead to
> decreased overall security of a database and inefficient queries.
> 
> The catalyst for MVC frameworks on the web has been the slew of poorly
> written applications mostly in PHP & Perl , this has driven many
> programmers looking for control & consistency.  However this need is
> short sighted when people find a magical bullet MVC Framework, and do
> not place emphasis on minimization & reusability of code.  Therefore
> you end up with the same paradigm as before, just crappy applications
> separated out into pieces.
> 
> No doubt there should be separation of layers, but there also has to
> be a real dialogue about programming as a discipline & science, not as
> a craft of gluing popsicle sticks together.
> 
> There should be more discussion of architecture before a project
> starts and more code reviews and discussions in project teams.  Also
> one off projects (putting one programming on an island giving them a
> compiler/interpreter) is a great way to get a crappy application.
> 
> That being said, I presently don't use one, but I'm still holding out
> for an MVC framework that works for me and provides me power,
> flexibility and is well documented.
> 

Xah, is that you?


From timr at probo.com  Thu Mar  8 02:08:53 2007
From: timr at probo.com (Tim Roberts)
Date: Thu, 08 Mar 2007 07:08:53 GMT
Subject: how can I find out the value of an environment variable?
References: <1173147734.603718.179870@8g2000cwh.googlegroups.com>
Message-ID: <sidvu291fj27bj5cild7l1jo2gpasbt88o@4ax.com>

"ken" <ken.carlino at gmail.com> wrote:
>
>how can I find out the value of an environment variable in my pythong
>script?

 C:\Apps\Python24>python
 Python 2.4.1 (#65, Mar 30 2005, 09:13:57) [MSC v.1310 32 bit (Intel)] on
win32
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import os
 >>> os.environ['PATH']

'C:\\WINDOWS\\system32;c:\\WINDOWS;c:\\WINDOWS\\System32\\Wbem;c:\\bin;e:\\bin'
 >>>
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From newsuser at stacom-software.de  Fri Mar 16 09:20:31 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Fri, 16 Mar 2007 14:20:31 +0100
Subject: String formatting with fixed width
Message-ID: <ete5ec$juo$2@online.de>

Hello alltogether,

is it possible to format stings with fixed width of let's say 7 character. T 
need a floating point with 3 chars before dot, padded with ' ' and 3 chars after 
dot, padded with '0'.

Followingh is my approach
 >>> f = 21.1
 >>> s = "%.03f" % f
 >>> s
'21.100'

But there are missing ' '. How can I get that? (For bigger numbers than 999 they 
might be cut: 1021 -> 021)

Thanks,
Alexander


From bruno.desthuilliers at gmail.com  Thu Mar  1 03:14:43 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 1 Mar 2007 00:14:43 -0800
Subject: Question about raise and exceptions.
In-Reply-To: <o0jcu2hhqs13gu04vnmd8tmp3849u1pg54@4ax.com>
References: <mailman.4523.1172688540.32031.python-list@python.org>
	<snkbu25ft2hn3hrchg888afkapgrjutonn@4ax.com>
	<45e5e640$0$18215$426a74cc@news.free.fr>
	<o0jcu2hhqs13gu04vnmd8tmp3849u1pg54@4ax.com>
Message-ID: <1172736883.332020.299830@a75g2000cwd.googlegroups.com>

On 1 mar, 04:46, Daniel Klein <danielklei... at gmail.com> wrote:
> On Wed, 28 Feb 2007 22:03:13 +0100, Bruno Desthuilliers
>
>
>
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> >Daniel Klein a ?crit :
> >> The arguments for TransitionError must be a tuple,
>
> >Err...
>
> >> eg:
>
> >> msg = "Going to error state %d from state %d" % (self.curr_state,
> >> newstate)
> >> raise TransitionError(self, curr_state, newstate, msg)
>
> >Where did you see a tuple here ? You're code is *calling*
> >TransitionError, passing it the needed arguments.
>
> >Note that it's the correct syntax - but not the correct explanation !-)
>
> My bad :-(
>
> Thanks for setting me straight. I had (wrongly) thought that the stuff
> inside of () was a tuple.

For the record, it's the ',' that makes the tuple.  The () are  (in
this context) the call operator.


>>> t = 1, 2, 3
>>> t
(1, 2, 3)
>>> type(t)
<type 'tuple'>
>>> t2 = 1,
>>> t2
(1,)
>>> def toto():
>>>     return "it's me"
...
>>> toto
<function toto at 0xb7d18c34>
>>> toto()
"it's me"
>>>





From psdasilvaX at esotericaX.ptX  Fri Mar 23 15:30:24 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 23 Mar 2007 19:30:24 +0000
Subject: Join strings - very simple Q.
In-Reply-To: <1174676818.207543.246080@l75g2000hse.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
Message-ID: <1174678166.970277@jubilee.claranet.pt>

Mike Kent escreveu:
...

> New way:
> l=['a','b','c']
> jl=','.join(l)
> 

I thank you all.

Almost there ...
I tried "".join(l,',') but no success ... :-(

Paulo


From jstroud at mbi.ucla.edu  Sat Mar 10 20:54:23 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 11 Mar 2007 01:54:23 GMT
Subject: minimum age to learn python (a.k.a graphical vs text languages)
In-Reply-To: <mailman.4905.1173540820.32031.python-list@python.org>
References: <mailman.4905.1173540820.32031.python-list@python.org>
Message-ID: <jjJIh.5107$FG1.2494@newssvr27.news.prodigy.net>

Brian Blais wrote:
> Hello,
> 
> I was wondering what the approximate minimum age to learn python is.  
> Has anyone had experience teaching middle school students, or elementary 
> school students Python? What brought this up for me is thinking about 
> starting a Lego robots group in a local middle school.  I only teach 
> college, and have little experience with middle school students, so I 
> find it hard to guess what they could actually do.  I started 
> programming when I was about 5th grade, on a Commodore VIC 20 (3.5k 
> RAM!) in basic, but I don't think I am typical.  (Of course, now, you 
> can probably infer my age to within 2 years!  :)  ).
> 
> 
> I've written something so that students can program in Python syntax to 
> run the Lego Mindstorms robots.  The most commonly used language for 
> these robotos, in the middle school, is Robolab which is entirely 
> graphical.  Although a good program, I find there are some drawbacks:
> 1) Robolab is commercial, and not all schools can afford this above and 
> beyond the price of the lego mindstorms
> 2) Robolab only runs on Mac/Windows, and not Linux, so those schools 
> that have tried to save money on the operating system get whacked there too
> 3) Robolab can *only* do Lego robots.
> 
> Although you learn the basic language structures (loops, branching, 
> etc...), because it is graphical, Robolab doesn't translate directly.  
> Perhaps this is enough for kids to start, but perhaps one can do better.
> 
> On the other hand, my pynqc tool (which uses the freely available nqc 
> language for the Lego Mindstorms) is:
> 1) free (in both senses)
> 2) runs on Mac/Linux/Windows
> 3) because you use python syntax, it is easier to go and do other python 
> projects not involving robots
> 
> In my mind, this opens up more doors, but it is not graphical.
> 
> I wanted to hear responses from people who have experience teaching 
> programming in elementary/middle (or even high) school.  Do graphical 
> languages make a big difference?  Do text-based languages put up 
> barriers to young learners?  Is it no big deal either way?
> 
> 
>         thanks,
> 
>             Brian Blais
> 

Probably, its not so much that graphical is easy to learn, but, for 
kids, I'm guessing that its less boring than text-based. They already 
understand a lot about programming by customizing their video games on 
the Wii, or whatever Sony playbox X.

Really, What you need is a "first person shooter" programming language. 
Perhaps, make them program their own guns or "power moves". Have 
competitions at the end of the week using the guns they create. There's 
nothing like learning to program by programming a bullet to follow a 
quadratic spline through a maze of corridors, nailing an opponent whose 
position was calculated by triangulation.

You'll see who the good programmers are then. Probably, you'll see some 
of the best programming of your life.

James


From aleax at mac.com  Fri Mar 30 10:41:33 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 30 Mar 2007 07:41:33 -0700
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<euikp8$2dgn$1@ariadne.rz.tu-clausthal.de>
Message-ID: <1hvs2eo.po0daya4nuegN%aleax@mac.com>

Thomas Kr?ger <newsgroups at nospam.nowire.org> wrote:

> BTW: having one way to do it is one of the main ideas of Python's
> philosophy.

Yes, just like C's -- see point 4 in the "Spirit of C" summary taken
from the ISO Standard for C and quoted e.g. at
<http://www.artima.com/cppsource/spiritofc.html> .  Of course, it's an
ideal, a design principle, not an actual description of how things turn
out (in either language).


Alex


From laurent.pointal at limsi.fr  Fri Mar  9 10:05:03 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 09 Mar 2007 16:05:03 +0100
Subject: Creating a DLL file from Python Code
In-Reply-To: <1173442086.281115.95300@q40g2000cwq.googlegroups.com>
References: <1173442086.281115.95300@q40g2000cwq.googlegroups.com>
Message-ID: <esrt2i$47n$1@news2.u-psud.fr>

macedo.silva at gmail.com a ?crit :
> Hi,
> 
> I would like to request your attention for this very specific issue:
> 
> I have several classes in Python, and now I want simply re-use it, in
> other language.
> 
> The closest to solution I think I came was with this site:
> http://www.py2exe.org/index.cgi/Py2exeAndCtypesComDllServer
> but I not able to solve questions related with TLB files and
> __init__.py files.
> 
> So, could anyone give a tip about how to creat a dll file from Python?
> It is possible under any conditions?

For inter-languages intagration maybe you can use some distributed
objects protocol like CORBA (see OmniORBpy), or - as you wrote about a
DLL - COM/DCOM (see pywin32). Or write a simple TCP or UDP layer to
communicate with your existing classes.
Note: all that need some work in the Python side to be able to work
using a client/server model.
Note2: as long as your interface dont change, you can make modifications
in both sides without problem.

A+

Laurent.


From steve at holdenweb.com  Mon Mar 19 23:04:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 23:04:09 -0400
Subject: Still the __new__ hell ...
In-Reply-To: <568s5gF287c68U2@mid.individual.net>
References: <1174167360.522350@jubilee.claranet.pt>	<45fe7f46$0$2138$426a74cc@news.free.fr>	<1174337519.926611@jubilee.claranet.pt>
	<568s5gF287c68U2@mid.individual.net>
Message-ID: <etnj29$lpu$1@sea.gmane.org>

greg wrote:
> Paulo da Silva wrote:
>> As a relatively inexperient
>> in python, how could I know that a 'string' is an instance of
>> basestring?
> 
>    isinstance(x, basestring)
> 
> This works because basestring is defined as the
> tuple (str, unicode) and isinstance accepts a
> tuple of types as well as just a single type.
> 
The idea is right, but the detail is completely wrong.

basestring is a *type*.

  >>> basestring
<type 'basestring'>

It's the base class of which both str and unicode are subclasses.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From no at spam.it  Thu Mar  1 13:44:25 2007
From: no at spam.it (Pablo was Paolo)
Date: Thu, 01 Mar 2007 19:44:25 +0100
Subject: Reading csv files using SQL
In-Reply-To: <mailman.4581.1172769998.32031.python-list@python.org>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>	<45e6731d$0$4786$4fafbaef@reader4.news.tin.it>	<mailman.4568.1172751025.32031.python-list@python.org>	<45e70a14$0$37202$4fafbaef@reader3.news.tin.it>
	<mailman.4581.1172769998.32031.python-list@python.org>
Message-ID: <45e71f07$0$819$4fafbaef@reader5.news.tin.it>

Tim Golden ha scritto:
> I vaguely remember that you can get an ODBC driver for CSV.

There is a standard ODBC driver for use text file or csv, in windows.
But I use Linux on production servers.
I'd like to find a Python library or tool.

Thanks!
Paolo


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 28 07:15:17 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 28 Mar 2007 13:15:17 +0200
Subject: XML Parsing
In-Reply-To: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
Message-ID: <460a4e2f$0$14532$426a74cc@news.free.fr>

pyapplico at gmail.com a ?crit :
> I want to parse this XML file:
> 
> <?xml version="1.0" ?>
> 
> <text>
> 
> <text:one>
> <file>filename</file>
> <contents>
> Hello
> </contents>
> </text:one>
> 
> <text:two>
> <file>filename2</file>
> <contents>
> Hello2
> </contents>
> </text:two>
> 
> </text>
> 
> This XML will be in a file called filecreate.xml
> 
> As you might have guessed, I want to create files from this XML file
> contents, so how can I do this?

Using a sax parser might be the best solution here.



From deets at nospam.web.de  Wed Mar 21 10:03:57 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 Mar 2007 15:03:57 +0100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
Message-ID: <56csadF28irilU1@mid.uni-berlin.de>

flit wrote:

> Hello All,
> 
> I have a hard question, every time I look for this answer its get out
> from the technical domain and goes on in the moral/social domain.
> First, I live in third world with bad gov., bad education, bad police
> and a lot of taxes and bills to pay, and yes I live in a democratic
> "state" (corrupt, but democratic).
> So please, don't try to convince me about the social / economical /
> open source / give to all / be open / all people are honest until
> prove contrary / dance with the rabbits...
> Remember I need to pay bills and security.
> Now the technical question:

Most of these discussions aren't about open source or moral, but exactly
about what you ask - technicalities. A friend of mine is so f**ing fluent
with a disassembler, he immediately has whatever amount of credits he wants
in your usual simulation style game. 

It's just a question of if the hurdles you put up are high enough for you
intended audience - and for some reason people feel that compiled code
would be much more safe. It's not. Unless very special measures are taken
(e.g. skype), but that then is also beyond the common C-compiler run.

And what almost always is not a point is that you've programmed something
that would be interesting for outher to rip apart and use in pieces. Sorry,
but 99% of all code is just a bit of glue logic - and the reluctance of
developers to even use explicitly bought and well-documented libraries
instead of rolling out their own, customized solution illustrates that
adjusting your mindset to that of somebody else is much more of a problem
than actually writing amounts of - mostly trivial - code.

The only _real_ interesting thing is copy-protection. But that's a problem
for all, also the compiler-camp-buddies.

> 1 - There is a way to make some program in python and protects it? I
> am not talking about ultra hard-core protection, just a simple one
> that will stop 90% script kiddies.

If you can, just deliver the pyc-files. Should be hard enough for most
people.

> 2 - If I put the code in web like a web service, how can I protect my
> code from being ripped? There is a way to avoid someone using my site
> and ripping the .py files?

A service doesn't expose those files, unless you somehow instruct it to do
so.

Diez


From aleax at mac.com  Thu Mar 29 03:46:40 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 00:46:40 -0700
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
	<1175154020.467194.40000@b75g2000hsg.googlegroups.com>
Message-ID: <1hvpoqf.1jl697wvbomidN%aleax@mac.com>

<s99999999s2003 at yahoo.com> wrote:
   ...
> under what circumstances do we need to create a copy of a tuple :->
> "btuple = atuple[:]". tuples are immutable, so wouldn't it be "wasting
> memory"?

Nah -- btuple is atuple.  The "copy" is a no-op, in this case.

> another query, in the docs, list(a) and a[:] does the same thing (a =
> [1,2,3] for example), but besides the speed of slicing is faster than
> list(), what advantage is there for using list(a) in this case ?

Readability (a word is more readable than idiomatic punctuation), and
conceptual uniformity with making shallow copies of other containers of
known types such as sets and dicts.


Alex


From cjw at sympatico.ca  Sat Mar 17 16:26:55 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sat, 17 Mar 2007 16:26:55 -0400
Subject: distributing python software in jar like fashion
In-Reply-To: <1173926243.640611.107130@o5g2000hsb.googlegroups.com>
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<1173926243.640611.107130@o5g2000hsb.googlegroups.com>
Message-ID: <ethiug$u71$1@sea.gmane.org>

ce wrote:
> On Mar 15, 10:23 am, alf <ask at me> wrote:
>> Hi,
>>
>> I have a small app which consist of a few .py files. Is there any way to
>> distribute it in jar like fashion as a single file I can just run python
>> on. I obviously look for platform independent solution.
>>
>> Thx in advance, A.
> 
> You can import from zip achieves as PEP 273, but to execute in the
> same mechanism as the jar files, recently there is no way afaik.
You could treat the collection of files as a Python package.  You would 
then add an __init__.py file to your collection and, in that __init__.py 
arrange to initiate main.py (or  whatever you call your initiator program).

Colin W.
> 
> ce (pain n d'ass)
> 



From cyberco at gmail.com  Sun Mar 11 12:07:23 2007
From: cyberco at gmail.com (cyberco)
Date: 11 Mar 2007 09:07:23 -0700
Subject: PIL: reading bytes from Image
In-Reply-To: <mailman.4925.1173573914.32031.python-list@python.org>
References: <1173568560.648691.61760@64g2000cwx.googlegroups.com>
	<mailman.4925.1173573914.32031.python-list@python.org>
Message-ID: <1173629243.214806.220070@s48g2000cws.googlegroups.com>

Thanks,

I've tried the StringIO option as follows:

=================================
img = Image.open('/some/path/img.jpg')
img.thumbnail((640,480))
file = StringIO, StringIO()
img.save(file, 'JPEG')

=================================

But it gives me:

=================================

exceptions.TypeError                                 Traceback (most
recent call last)

C:\Python24\lib\site-packages\PIL\Image.py in save(self, fp, format,
**params)
   1303
   1304         try:
-> 1305             save_handler(self, fp, filename)
   1306         finally:
   1307             # do what we can to clean up

C:\Python24\lib\site-packages\PIL\JpegImagePlugin.py in _save(im, fp,
filename)
    407         )
    408
--> 409     ImageFile._save(im, fp, [("jpeg", (0,0)+im.size, 0,
rawmode)])
    410
    411 def _save_cjpeg(im, fp, filename):

C:\Python24\lib\site-packages\PIL\ImageFile.py in _save(im, fp, tile)
    464     bufsize = max(MAXBLOCK, im.size[0] * 4) # see RawEncode.c
    465     try:
--> 466         fh = fp.fileno()
    467         fp.flush()
    468     except AttributeError:

TypeError: descriptor 'fileno' of 'file' object needs an argument
=================================

It looks similar to the code in Sparklines except for the fact that
the latter creates an Image from scratch.

2B

> Saving the image, in a
> format your client understands, to a file like object like
> StringIO.StringIO is an easy path to take.
>
> Sparklines shows this in action:
>
> http://bitworking.org/projects/sparklines/
>
> max




From timothy.kellogg at gmail.com  Mon Mar  5 23:03:27 2007
From: timothy.kellogg at gmail.com (timothy.kellogg at gmail.com)
Date: 5 Mar 2007 20:03:27 -0800
Subject: CherryPy + Database questions
In-Reply-To: <552l55F22aph6U1@mid.uni-berlin.de>
References: <mailman.4673.1173101612.32031.python-list@python.org>
	<552l55F22aph6U1@mid.uni-berlin.de>
Message-ID: <1173153806.918779.241900@j27g2000cwj.googlegroups.com>

On Mar 5, 8:44 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> Brian Blais wrote:
> > Hello,
>
> > I have more of a conceptual question about the way databases work, in a
> > web
> > framework, but I will be implementing things with CherryPy and SQLAlchemy.
> >  If you make a web form that adds rows to a database, and use sqlite as
> > the engine, is there a danger of a race condition if several users at the
> > same time try to submit the
> > form?  I want a unique row id, and make a unique identifier for the
> > submissions.  Am I in danger of having multiple submissions given the same
> > identifier?
>
> > I know that if I implemented things without a database, but used a flat
> > file or something like it, I would have that possibility, when two
> > processes try to read and update the file at the same time.
>
> > If you want something more specific, I can throw some code together, but I
> > wanted to get an answer before that because it will change the way I
> > develop the code.
>
> Usually, that is exactly what a RDBMS gives you. See the database connector
> module's threadsaftey property to see what exactly you can expect.
>
> Diez

SQLite isn't really a DBMS at all, it's just a library.  According to
their FAQ (http://www.sqlite.org/faq.html#q8) it is only threadsafe as
long as you aren't changing the same DB in separate threads (so no,
not threadsafe at all).

Hope this helps.

--Tim



From tjreedy at udel.edu  Wed Mar 21 19:45:14 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 Mar 2007 19:45:14 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl><pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
Message-ID: <etsg2a$9gv$1@sea.gmane.org>


"Marcin Ciura" <marcin.ciura at poczta.NOSPAMonet.pl> wrote in message 
news:etscd5$g0g$1 at news.onet.pl...
| Neither would I. I must have expressed myself not clearly enough.
| Currently
| x = y = z
| is roughly equivalent to
| x = z
| y = z

except that z is only evaluated once.

| I propose to change it to
| y = z
| x = z

Unless target expression expressions interact, there is no difference. 
When there are such side effects, I think it best to be explicit about what 
you want to happen first, as in your original code, instead of trying to 
mash them together in one line.

Terry Jan Reedy





From newsuser at stacom-software.de  Mon Mar  5 04:36:41 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Mon, 05 Mar 2007 10:36:41 +0100
Subject: Howto pass exceptions between threads
Message-ID: <esgo77$t6e$1@online.de>

Hallo Alltogether,

I've searched in this mailing list, but it seems to me that there is no general 
approach to pass exceptions from one thread to another.

I think most application do a unique way of handling "unhandled exceptions", at 
least they (should) try to log them.

The following discussion seems to me most valuable (Sorry for the long URL, I 
don't know a way of shorter)

http://groups.google.de/group/comp.lang.python/browse_frm/thread/a2ebb2a2f611779b/4b820c20ff3fcea8?lnk=gst&q=%2Bexception+%2Bthread&rnum=6&hl=de#4b820c20ff3fcea8
http://groups.google.de/group/comp.lang.python/browse_frm/thread/2c61c06795f525f3/348a8d9e85883fe3?lnk=gst&q=pass+%2Bexception+%2Bthread&rnum=1&hl=de#348a8d9e85883fe3

I've the feeling that if you're using the python class threading.Thread you've a 
unique interface of handling it. (thread synchronizing + exception raising)

But' when you've a C++ extension, that uses it's own thread implementation and 
your exceptions happens in python code (but from a thread that is controlled by 
your extension) you have another problem.

Maybe I've overseen something in the python docu, so I ask for the solutions, 
concepts, hints ... you solved the problem.

Regards
Alexander


From pecora at anvil.nrl.navy.mil  Fri Mar  9 11:20:38 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 Mar 2007 11:20:38 -0500
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<1173455185.225036.167700@64g2000cwx.googlegroups.com>
Message-ID: <pecora-A2B96D.11203809032007@ra.nrl.navy.mil>

In article <1173455185.225036.167700 at 64g2000cwx.googlegroups.com>,
 "Bart Ogryczak" <B.Ogryczak at gmail.com> wrote:

> On Mar 9, 3:30 pm, Lou Pecora <pec... at anvil.nrl.navy.mil> wrote:
> > Then mymodule is imported only once, but each module has access to it
> > through the module name (mod1 and mod2) and the alias MM (mod3).  Is
> > that right?
> 
> Yes, it is.

Praise the Lord.  :-)  I got one right in the namespaces puzzles. (But 
see my followup on using  'from XXX import *' in this thread.  I'm still 
not a namespace guru.

> > I was concerned about multiple imports and efficiency.
> 
> If the module is already loaded, it won't be loaded again. Dictionary
> of loaded modules is avaliable as sys.modules.

Good to know.  Thank you.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From steven.potter at gmail.com  Sat Mar 17 15:44:45 2007
From: steven.potter at gmail.com (Steve  Potter)
Date: 17 Mar 2007 12:44:45 -0700
Subject: Pickle and Instance Methods
Message-ID: <1174160685.098122.29780@l77g2000hsb.googlegroups.com>

I have a class that I am trying to pickle.   One of the attributes is
used to set a callback e.g.
self.attribute.setCallback(self.callbackfunction).
I understand that this cannot be saved by pickle.
My question is, is there another way of setting a callback that would
agree with pickle?
If not is there some way to make pickle ignore the problem attribute?


Thanks,

Steve



From ocollioud at gmail.com  Thu Mar 15 03:02:11 2007
From: ocollioud at gmail.com (olive)
Date: 15 Mar 2007 00:02:11 -0700
Subject: Mocking OpenOffice in python?
In-Reply-To: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
Message-ID: <1173942131.661806.293780@y80g2000hsf.googlegroups.com>

On Mar 14, 9:39 am, "PaoloB" <pibi... at gmail.com> wrote:
> Hi everyone,

Since OO is shipped with Py 2.3 only, I use Jython to drive OO through
its Java API.

Our app is a mix of:
- ODT XML scrapping/templating based on Dom4j which, surprisingly,
when use with Jython, is the most pythonic XML API I have tried so far
(I find better than minidom, ElementTree or even lxml which is my
choice under CPython).
- OObean integrated in Java Gui and driven by Jython.

I don't like Java much though, but this is what our management wants
us to use.
By chance, Jython is tolerated so far.

Olive.



From edurand.com at gmail.com  Thu Mar  8 02:52:31 2007
From: edurand.com at gmail.com (edurand)
Date: 7 Mar 2007 23:52:31 -0800
Subject: image processing
In-Reply-To: <mailman.4735.1173243292.32031.python-list@python.org>
References: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>
	<7xirdekauw.fsf@ruckus.brouhaha.com>
	<1173186981.056242.152120@64g2000cwx.googlegroups.com>
	<mailman.4735.1173243292.32031.python-list@python.org>
Message-ID: <1173340351.471170.52050@q40g2000cwq.googlegroups.com>

On Mar 7, 5:54 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Tue, 06 Mar 2007 10:16:21 -0300, edurand <edurand.... at gmail.com>
> escribi?:
>
> > On Mar 6, 9:57 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> >> "edurand" <edurand.... at gmail.com> writes:
> >> > Have a look at :http://filters.sourceforge.net/
> > It's a DLL, so yes, it run on Windows.
> > If someone would like to port it on other OS, why not.
>
> Could you please update the project attributes then? Operating System,
> Language... They appear not to have the right values.
>
> --
> Gabriel Genellina

You are right. I have changed "Operating System" to "All 32-bit MS
Windows (95/98/NT/2000/XP)".
For the "Programming Language", we don't have to change anything,
because Filters can be used in C, C++, C#, Delphi, Java, Python, .NET

Thanks for your comment
Emmanuel Durand



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 16:55:54 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 07 Mar 2007 22:55:54 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <1173295587.143018.102220@p10g2000cwp.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173295587.143018.102220@p10g2000cwp.googlegroups.com>
Message-ID: <45ef2ce6$0$6088$426a74cc@news.free.fr>

Miki a ?crit :
> Hello Arnaud,
> 
> 
>>Imagine I have three functions a(x), b(x), c(x) that each return
>>something or raise an exception.  Imagine I want to define a function
>>that returns a(x) if possible, otherwise b(x), otherwise c(x),
>>otherwise raise CantDoIt.
> 
> Exceptions are for error handling, not flow control.

def until(iterable,sentinel):
   for item in iterable:
     if item == sentinel:
       raise StopIteration
     yield item

 >>> for item in until(range(10), 5):
...     print item
...
0
1
2
3
4
 >>>

Exceptions *are* a form of flow control.


From http  Fri Mar  9 11:00:48 2007
From: http (Paul Rubin)
Date: 09 Mar 2007 08:00:48 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<mailman.4858.1173454941.32031.python-list@python.org>
Message-ID: <7xps7ipftb.fsf@ruckus.brouhaha.com>

Carsten Haese <carsten at uniqsys.com> writes:
> > Given two positive integers, N and M with N < M, I have to generate N
> > positive integers such that sum(N)=M. No more constraints.
> Paul still had a point, since the word "positive" is a vital piece of
> information that never appeared in your original description.

It's maybe even more complicated that way.  Does the OP want to
generate each possible partition with equal probability?  See

  http://en.wikipedia.org/wiki/Partition_number

for more info.


From aleax at mac.com  Thu Mar 22 00:47:05 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 21 Mar 2007 21:47:05 -0700
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
	<mailman.5403.1174493865.32031.python-list@python.org>
	<etrpqf$t8g$3@gemini.csx.cam.ac.uk>
Message-ID: <1hvchlx.13gg6ie17naf4oN%aleax@mac.com>

Tom Wright <tew24 at spam.ac.uk> wrote:

> real programs.  I can't help thinking that there are some situations where
> you need a lot of memory for a short time though, and it would be nice to
> be able to use it briefly and then hand most of it back.  Still, I see the
> practical difficulties with doing this.

What I do in those cases:
a. fork
b. do the memory-hogging work in the child process
c. meanwhile the parent just waits
d. the child sends back to the parent the small results
e. the child terminates
f. the parent proceeds merrily

I learned this architectural-pattern a long, long time ago, around the
time when fork first got implemented via copy-on-write pages... 


Alex


From kavithapython at yahoo.co.in  Thu Mar  8 14:40:57 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Thu, 8 Mar 2007 19:40:57 +0000 (GMT)
Subject: writing dictionary to file
In-Reply-To: <8c7f10c60703081024t5bddb16ne98cf5ba5b4db670@mail.gmail.com>
Message-ID: <677146.76946.qm@web7811.mail.in.yahoo.com>

Hi Simon,
   
  iam till here:
   
  dorc=some['DorC']
  amount=some['amount']
  f=open("logfile.txt", "w")
  if dorc =='C':
   a = -(amount)
if dorc == 'D':
   b = amount
   sum=a + b
   if sum == 0:
       f.writelines("name:")
       f.writelines("%s" %some['name'])
       f.writelines("credit:")
       f.writelines("%s" % amount)
   
  but i see an empty file opened,,,
   
  kavitha
   
  Simon Brunning <simon at brunningonline.net> wrote:
  On 3/8/07, kavitha thankaian wrote:
> can anyone help me???

I'm sure we can. How far have you got so far?

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning
MSN: small_values


 				
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From ashwin.kashyap at thomson.net  Fri Mar  9 16:45:29 2007
From: ashwin.kashyap at thomson.net (Ashwin Kashyap)
Date: Fri, 09 Mar 2007 16:45:29 -0500
Subject: Adding Lib/site-packages
Message-ID: <1173476729.9800.3.camel@kashyapa2.prin.am.thmulti.com>

Hello,
I am trying to create a python distribution using the Python-2.5
sources. What I would like to do is to add a bunch of Python packages to
the Lib/site-packages directory and have them compiled and installed
when I do a ./configure && make install

For example, I checked in M2Crypto, python-cjson into Lib/site-packages
directory. Will it be compiled in automatically or do I need to do a
manual "python setup.py" for each?

Which files do I need to edit and how do I accomplish this?


Thanks,
Ashwin




From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:53:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:53:18 -0300
Subject: Returning other instance from __init__ - I need help
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
	<1173970438.864747@jubilee.claranet.pt>
	<1174076229.671240@jubilee.claranet.pt>
	<1174093476.6937@jubilee.claranet.pt>
Message-ID: <op.tpbfbxk2x6zn5v@gabriel2>

En Fri, 16 Mar 2007 22:05:05 -0300, Paulo da Silva  
<psdasilvaX at esotericaX.ptX> escribi?:

> When debugging, I found this is wrong!!!
> Would someone please clarify what do I have to return from
> __new__?

Try this. I used a classmethod for load, it may be easier to subclass.

class C(object):

     def __new__(cls, filename=None, foo=None, bar=None):
         if filename is not None:
             return cls.load(filename)
         inst = super(C, cls).__new__(cls)
         inst.foo = foo
         inst.bar = bar
         return inst

     @classmethod
     def load(cls, filename):
         inst = super(C, cls).__new__(cls)
         inst.foo = "some foo loaded from "+filename
         inst.bar = "some bar loaded from "+filename
         return inst

class D(C):
     @classmethod
     def load(cls, filename):
         inst = super(D, cls).__new__(cls)
         inst.foo = "D foo loaded from "+filename
         inst.bar = "D bar loaded from "+filename
         return inst


c1 = C(foo=1, bar=2)
print "c1=", c1
print "c1.foo=", c1.foo
print "c1.bar=", c1.bar
c2 = C(filename="xxx.txt")
print "c2=", c2
print "c2.foo=", c2.foo
print "c2.bar=", c2.bar

d1 = D(foo=10, bar=20)
print "d1=", d1
print "d1.foo=", d1.foo
print "d1.bar=", d1.bar
d2 = D(filename="yyy.txt")
print "d2=", d2
print "d2.foo=", d2.foo
print "d2.bar=", d2.bar


-- 
Gabriel Genellina



From rschroev_nospam_ml at fastmail.fm  Thu Mar  8 04:57:17 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Thu, 08 Mar 2007 09:57:17 GMT
Subject: VIM: Python type indented-block command equivalent to % for C?
In-Reply-To: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>
References: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>
Message-ID: <16RHh.49465$%k1.388231@phobos.telenet-ops.be>

Paddy3118 schreef:
> Assuming that only space characters are allowed
> for indenting, is their a way to yank a Python
> block like y% works for C , or a way to move to
> the end of a block defined by indentation?
> 
> I have tried help indent but could not find
> anything.

I don't know either, but if you find anything, please post it to this 
list: I'm looking for such functionality too.

-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From grahn+nntp at snipabacken.dyndns.org  Fri Mar 23 10:14:51 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 23 Mar 2007 14:14:51 GMT
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
Message-ID: <slrnf07k5r.3nr.grahn+nntp@frailea.sa.invalid>

On 21 Mar 2007 12:18:50 -0700, Paddy <paddy3118 at googlemail.com> wrote:
> I just had a link to Tim peters first post on doctest:
> http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> removed from http://en.wikipedia.org/wiki/Doctest as it doesn't fit
> their guidelines for external links.
> I wonder, could maybe the official website be persuaded to host a copy
> so that it could be linked to?

Wikipedia should have some guideline for referencing Usenet postings,
somewhere ...

Anyway, it's a good thing to provide at least the Message-ID of the
posting. As an example, your your posting here was uniquely identified
by the Message-ID

  <1174504730.728688.52380 at y80g2000hsf.googlegroups.com>

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From joshua at eeinternet.com  Wed Mar  7 15:07:58 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 07 Mar 2007 11:07:58 -0900
Subject: thread and portability Unix/Linux
References: <1173264866.645389.268640@v33g2000cwv.googlegroups.com>
Message-ID: <45ef0f17$0$16318$88260bb3@free.teranews.com>

awalter1 wrote:

> Hi,
> I have a Python application that runs under HPUX 11.11 (then unix). It
> uses threads :
> from threading import Thread
> # Class Main
> class RunComponent(Thread):
> 
> My application should run under Linux (red hat 3 ou 4) and I read that
> differences exist between the implementation of threads : on HPUX
> 11.11 there is CMA (ou DCE) threads and on Linux POSIX thread. Do you
> think that my Python application should be modified or may be such
> differences are hidden by the python interpreter ?
> In other terms, do I get some risks on this particular aspect by
> porting my application ?
> Thanks a lot
> 
> PS: If you are aware of other risk of porting, I am interested too.

The Python threading model abstracts from the underlying OS threading, so
there should be no need to change anything (AFAIK).

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From jstroud at mbi.ucla.edu  Thu Mar 22 23:01:47 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 22 Mar 2007 20:01:47 -0700
Subject: My MVC critique
In-Reply-To: <etvfsi$bdp$1@daisy.noc.ucla.edu>
References: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
	<etvfsi$bdp$1@daisy.noc.ucla.edu>
Message-ID: <etvfur$bdp$2@daisy.noc.ucla.edu>

James Stroud wrote:
> scott.w.white at gmail.com wrote:
> 
>> Looking at different MVC frameworks from many langauges from PHP to
>> Python, I've concluded that the explosion of MVC frameworks is mainly
>> due to undisciplined & unexperienced programmers.
>>
>> Nobody would argue about the separation of the layers because this is
>> not the problem I have with it, if anything most implementations
>> emphasis separation at the wrong places.  The end solutions end up
>> looking very mickey mouse.
>>
>> It's been long asserted starting with Smalltalk there there be a
>> separation of layers with an application starting with the view (what
>> the user sees), the controller (which controls the flow of the
>> application) and the model (the representation of the data).
>>
>> What MVC does not emphasis is the separation of the data access layer,
>> one of the most important pieces of an application.  So what is done
>> with this?  For many the DAL is either encapsulated within the model
>> or some toolkit that generates the SQL for them, this may lead to
>> decreased overall security of a database and inefficient queries.
>>
>> The catalyst for MVC frameworks on the web has been the slew of poorly
>> written applications mostly in PHP & Perl , this has driven many
>> programmers looking for control & consistency.  However this need is
>> short sighted when people find a magical bullet MVC Framework, and do
>> not place emphasis on minimization & reusability of code.  Therefore
>> you end up with the same paradigm as before, just crappy applications
>> separated out into pieces.
>>
>> No doubt there should be separation of layers, but there also has to
>> be a real dialogue about programming as a discipline & science, not as
>> a craft of gluing popsicle sticks together.
>>
>> There should be more discussion of architecture before a project
>> starts and more code reviews and discussions in project teams.  Also
>> one off projects (putting one programming on an island giving them a
>> compiler/interpreter) is a great way to get a crappy application.
>>
>> That being said, I presently don't use one, but I'm still holding out
>> for an MVC framework that works for me and provides me power,
>> flexibility and is well documented.
>>
> 
> Xah, is that you?

Oh, wait...No. Not crossposted. Must be someone else.


From no at spam.it  Thu Mar  1 01:30:54 2007
From: no at spam.it (Pablo was Paolo)
Date: Thu, 01 Mar 2007 07:30:54 +0100
Subject: Reading csv files using SQL
In-Reply-To: <WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>
	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>
Message-ID: <45e6731d$0$4786$4fafbaef@reader4.news.tin.it>

Hi,

Dennis Lee Bieber ha scritto:
> 	You could maybe use SQLite to load the CSV file and process in an
> actual DBMS...

Ok, this is the solution I'm using actually (with PostGres).
My hope is to find a way to do the same thing without using a DBMS but 
working directly with the files.

Thanks a lot,
Paolo


From laurent.pointal at limsi.fr  Wed Mar  7 04:44:44 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 07 Mar 2007 10:44:44 +0100
Subject: Device Drivers in python(kernel modules)
In-Reply-To: <0KgHh.7433$re4.5435@newssvr12.news.prodigy.net>
References: <180b672e0703060409i7eca1b65se10923c79a8f5b23@mail.gmail.com>
	<mailman.4713.1173185473.32031.python-list@python.org>
	<0KgHh.7433$re4.5435@newssvr12.news.prodigy.net>
Message-ID: <esm1i1$p9l$1@news2.u-psud.fr>

John Nagle a ?crit :
> Thomas Ploch wrote:
>> rishi pathak schrieb:
>>
>>> I am not much of a kernel programmer , I have a requirement to shift a
>>> python code to work as a kernel module.
>>> So I was just wondering whether we can write a kernel module in python.
>>> A thought is that if we can somehow convert python code into a C object
>>> code then it can be done.
>>> Can some one suggest something..anything
> 
>    3.  This is probably a bad idea.  If it doesn't have to go in the
> operating system kernel, it shouldn't go in the kernel.
> 
>                 John Nagle

I agree.

If (under Linux) this is just to provide a driver-like interface (ie.
using file-system objects manipulation), OP may take a look at FUSE
(Filesystem in Userspace - http://fuse.sourceforge.net/) and its Python
binding (http://www.google.fr/search?q=FUSE+%2B+Python).


From deets at nospam.web.de  Fri Mar 30 07:59:23 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 Mar 2007 13:59:23 +0200
Subject: Library for windows ini-files ?
In-Reply-To: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
References: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
Message-ID: <574cd7F2bhegkU1@mid.uni-berlin.de>

stef schrieb:
> hello,
> 
> is there a Python library for easy reading and writing windows ini-files ?

Isn't ConfigParser ini-style? I'm not totally sure though.

Diez


From steve at holdenweb.com  Wed Mar 21 08:49:39 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 08:49:39 -0400
Subject: flattening/rolling up/aggregating a large sorted text file
In-Reply-To: <1174479568.427193.132740@n59g2000hsh.googlegroups.com>
References: <1174479568.427193.132740@n59g2000hsh.googlegroups.com>
Message-ID: <etr9nl$1o4$1@sea.gmane.org>

adtvff at yahoo.com wrote:
> Hi,
> 
> Given a large ascii file (delimited or fixed width) with one ID field
> and dimensions/measures fields, sorted by dimensions, I'd like to
> "flatten" or "rollup" the file by creating new columns: one for each
> combination of dimension level, and summing up measures over all
> records for a given ID.
> 
> If the wheel has already been invented, great, please point me in the
> right direction. If not, please share some pointers on how to think
> about this problem in order to write efficient code.
> 
> Is a hash with dimension level combinations a good approach, with
> values reset at each new ID level?
> 
> I know mysql, Oracle etc will do this , but they all have a cap on #
> of columns allowed. SAS will allow unlimited columns, but I don't own
> SAS.
> 
> Thanks.
> 
> 
> ID,color,shape,msr1
> ------------------------------
> 001, blue, square,  4
> 001, red , circle,    5
> 001, red,  circle,    6
> 
> 
> ID, blue_circle, blue_square, red_circle, red_square
> --------------------------------------------------------------------------
> 001,0,4,11,0
> 002 ...
> 
It seems a bit wrong-headed to force this problem to fit a solution 
where you define relations with a variable number of columns when the 
natural way to solve it would seem to be to sum the msr1 values for each 
unique combination of ID, color and shape. That's a pretty 
straightforward relational problem.

So, is there some reason the result *has* to have that variable number 
of columns?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From eric.brunel at pragmadev.com  Tue Mar 27 08:03:55 2007
From: eric.brunel at pragmadev.com (Eric Brunel)
Date: Tue, 27 Mar 2007 14:03:55 +0200
Subject: tkinter popup
References: <euaq8n$1l9$1@ss408.t-com.hr>
Message-ID: <op.tpujstcdyvwwzh@ericb.pragmadev>

On Tue, 27 Mar 2007 12:05:07 +0200, Gigs_ <gigs at hi.t-com.hr> wrote:

> Hi all
>
> I cant figure out how to disable resizing of my popup window?

myPopupWindow.wm_resizable(0, 0)

It may or may not make resize controls disappear depending on your  
platform and/or window manager. But the resizing will be impossible in any  
case.

> How to put this popup window to show in the middle of my text editor?
> It is writen with Toplevel.

A bit trickier. For example (untested):

myPopupWindow.after_idle(centerPopupWindow)

with:

def centerPopupWindow():
   x, y = editorWindow.winfo_rootx(), editorWindow.winfo_rooty()
   w, h = editorWindow.winfo_width(), editorWindow.winfo_height()
   ww, hh = myPopupWindow.winfo_width(), myPopupWindow.winfo_height()
   myPopupWindow.geometry('%sx%s+%s+%s', ww, hh, x + w/2 - ww/2, y + h/2 -  
hh/2)

The after_idle trick is needed since the dimensions for the popup window  
will only be known when the window is actually displayed. In theory,  
myPopupWindow.update_idletasks() should update the display so that the  
window dimensions are known, but there are cases where it doesn't work. So  
the after_idle trick is surer.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From mccredie at gmail.com  Thu Mar 15 17:09:53 2007
From: mccredie at gmail.com (Matimus)
Date: 15 Mar 2007 14:09:53 -0700
Subject: Tkinter menu toplevel or frame
In-Reply-To: <etc2tj$1d3$1@ss408.t-com.hr>
References: <etc2tj$1d3$1@ss408.t-com.hr>
Message-ID: <1173992993.267825.197990@y66g2000hsf.googlegroups.com>

> Please tell me is here anything that I should change.

The way you have written it, master _must_ be a Toplevel object. So,
maybe parent is the correct name, but it doesn't really matter.

As a side note, there is no reason for this class to inherit Frame.
Aside from packing and sizing the frame, you appear to do nothing else
with it. You could just as easily inherit from object. You should
never make a custom widget that packs itself anyway. A frame object
should act like a frame. What you have made looks more like what I
would call an application class. If you are trying to make a Menu, I
would inherit from that instead.

As an application class (you will still need the new,save... methods
to be defined):

class MyApp(object):
    def __init__(self, master=None):
        if master:
            self.master = master
        else:
            self.master = Tk()

         frame = Frame(master, width=200, height=200)
         frame.pack(fill=BOTH, expand=YES)

         self.makeMenuBar()

     def makeMenuBar(self):
         self.menubar = Menu(self.master)
         self.master.config(menu=self.menubar)

         pulldown = Menu(self.menubar, tearoff=0)
         pulldown.add_command(label='New', command=self.new)
         pulldown.add_command(label='Open', command=self.onOpen)
         pulldown.add_command(label='Save', command=self.save)
         pulldown.add_command(label='Save As', command=self.saveas)
         pulldown.add_separator()
         pulldown.add_command(label='Exit', command=self.onExit)
         self.menubar.add_cascade(label='File', underline=0,
menu=pulldown)

A menu class (this is untested, but it is close to how I would do it):

class MyMenu(Menu):
    def __init__(self, master=None, **kwargs):
        Menu.__init__(self, master, **kwargs):
        self.master = master

        # This is equivalent to self packing, do it outiside of the
widget
        # self.master.config(menu=self.menubar)

        pulldown = Menu(self, tearoff=0)
        pulldown.add_command(label='New', command=self.new)
        pulldown.add_command(label='Open', command=self.onOpen)
        pulldown.add_command(label='Save', command=self.save)
        pulldown.add_command(label='Save As', command=self.saveas)
        pulldown.add_separator()
        pulldown.add_command(label='Exit', command=self.onExit)
        self.add_cascade(label='File', underline=0, menu=pulldown)

You can use this in the application class:

class MyApp(object):
    def __init__(self, master=None):
        if master:
            self.master = master
        else:
            self.master = Tk()

         self.menubar = MyMenu(self.master)
         self.master.config(menu=self.menubar)

         frame = Frame(master, width=200, height=200)
         frame.pack(fill=BOTH, expand=YES)






From luismgz at gmail.com  Mon Mar 19 11:11:01 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 19 Mar 2007 08:11:01 -0700
Subject: PythonCard thoughts
In-Reply-To: <1174315460.650400.202270@e1g2000hsg.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
	<45fe9b31$0$17946$c3e8da3@news.astraweb.com>
	<1174315460.650400.202270@e1g2000hsg.googlegroups.com>
Message-ID: <1174317061.619314.215200@l77g2000hsb.googlegroups.com>

On Mar 19, 11:44 am, "king kikapu" <aboudou... at panafonet.gr> wrote:
> > I don't know much about PythonCard or wxGlade, but I use wxPython (which
> > wxGlade uses, right?) and you now have the option to separate your GUI
> > and code using an XRC file (xml file that describes layout). So perhaps
> > this is something you can do with wxGlade, but at the same time it might
> > still create the problem you describe above. However, it's very to have
> > your Python files contain just logic.
>
> Yes, both products (PythonCard and wxGlade) uses wxPython. It's just
> that PythonCard is sitting on top of wxPython and it intercepts the
> events generated. Then it search for an appropriate declared function
> on your code and call it (all this happens at runtime).
> It shield us from much of the boilerplate code that gui toolkits
> require and in the case that you need to address directly wxPython,
> you just can!
>
> I discovered that when you run your designed GUI from PythonCard's
> layoutEditor, you have the ability to define a command line option
> that is called
> "Message Watcher". This, will show you the names of the actual events
> that you have to write code for, so you, at least for this, do not
> have
> to dig the docs for their names. Pretty good!


Would you please explain more in detail this "Message Watcher" option?
I use PythonCard from time to time, and I find it very easy to use and
practical, even considering the small shortcomings you mentioned
above, but I have no idea of this feature you're talking about..

Regards,
Luis



From steve at REMOVE.THIS.cybersource.com.au  Thu Mar 29 00:56:15 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 29 Mar 2007 14:56:15 +1000
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
Message-ID: <pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>

On Wed, 28 Mar 2007 18:16:31 -0700, s99999999s2003 wrote:

> what do you mean by create new object when using list comprehensoin or
> list()? Does using slicing create a new object as well?

Yes it does.

>>> alist = [1, 2, 4, 8, 16]
>>> blist = alist # not a copy
>>> id(alist) == id(blist)
True
>>> blist = alist[:] # a copy
>>> id(alist) == id(blist)
False

By the way, "id(obj) == id(another_object)" is just a long way of writing
"obj is another_object".

In general:

- use a list comprehension when you need to calculate the list items

- use slicing when you are copying an actual list, or if you don't care
what type of object you get

- use the list() function when your existing object might not be an actual
list, and you want the copy to be a list.

E.g.

atuple = (1, 2, 3)
alist = [2*n+3 for n in atuple]
btuple = atuple[:]
blist = list(atuple)



-- 
Steven.



From jason at tishler.net  Fri Mar 16 08:36:51 2007
From: jason at tishler.net (Jason Tishler)
Date: Fri, 16 Mar 2007 08:36:51 -0400
Subject: Python Eggs on Cygwin
In-Reply-To: <1174005208.972118.104860@l77g2000hsb.googlegroups.com>
References: <1174005208.972118.104860@l77g2000hsb.googlegroups.com>
Message-ID: <20070316123651.GA3508@tishler.net>

Kazu,

On Thu, Mar 15, 2007 at 05:33:29PM -0700, Kazu Nisimura wrote:
> >>> import MySQLdb
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "build/bdist.cygwin-1.5.22-i686/egg/MySQLdb/__init__.py", line
> 19, in ?
>   File "build/bdist.cygwin-1.5.22-i686/egg/_mysql.py", line 7, in ?
>   File "build/bdist.cygwin-1.5.22-i686/egg/_mysql.py", line 6, in
> __bootstrap__
> ImportError: Permission denied
> 
> This seems to be Eggs/Cygwin problem.  Is there any solution?

The following is a WAG...

Does the MySQL Python module contain shared extension modules (i.e.,
DLLs)?  If so, are they executable?  If not, then make them so (i.e.,
chmod +x).

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6


From mikeschinkel at gmail.com  Sun Mar 11 10:01:13 2007
From: mikeschinkel at gmail.com (Mike Schinkel)
Date: Sun, 11 Mar 2007 10:01:13 -0400
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <op.to01f4bvx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com><1173595945.530722.273030@30g2000cwc.googlegroups.com><000a01c763c0$6863a560$2102fea9@Guides.local><op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar><008f01c763de$9a1a4190$0702a8c0@Guides.local>
	<op.to01f4bvx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <00a701c763e5$bac45c80$0702a8c0@Guides.local>

Gabriel Genellina wrote:
> > The problem is, how do I figure out how 
> > many spaces represent a tab? 
> 
> You can't, unless you have more context.

How does Python do it?

> > one case, someone could have their editor configured to
> > allow tabs to use 3 spaces and the user could
> > intermingle tabs and spaces. In other cases, a user
> > might have their editor configured to have a tab equal
> > 8 spaces yet also intermingle tabs and spaces. When a
> > human looks at the document it is obvious the setting
> > but how can I make it obvious to my program?
> > 
> "it is obvious the setting?" How do you infer that? From
> other properties of the document, semantics? Just from
> the content, and the number of tabs and spaces, you can't
> get anything.

>From looking at it. It might require changing tab widths in the editor, but
one setting will make it clear.

> > I could force the user to specify tabwidth at the top
> > of the file, but I'd rather not. And since Python
> > doesn't either, I know it is possible to write a parser
> > to do this. I just don't know how.
> > 
> Python simply assumes 8 spaces per tab. If your Python
> source ONLY uses tabs, or ONLY spaces, it doesn't matter.
> If you mix tabs+spaces, Python simple replaces each tab
> by 8 spaces. If you edited that using 4 spaces, Python
> will get it wrong. That's why all people always say
> "never mix tabs and spaces"

Ah.  I didn't know that.  Like I said at first, I am new to Python (but I've
been reading a lot about it!  3 books thus far. Nutshell, Cookbook,
wxPython)

Okay, I'll just use a directive at the top of the file and let the user
specify.  Not perfect, but such is life.

Thanks again.

-- 
-Mike Schinkel
http://www.mikeschinkel.com/blogs/
http://www.welldesignedurls.org
http://atlanta-web.org - http://t.oolicio.us

 



From martinunsal at gmail.com  Tue Mar  6 12:24:32 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 09:24:32 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4722.1173200207.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
	<1173199320.094675.58350@p10g2000cwp.googlegroups.com>
	<mailman.4722.1173200207.32031.python-list@python.org>
Message-ID: <1173201871.742845.84040@t69g2000cwt.googlegroups.com>

On Mar 6, 8:56 am, "Chris Mellon" <arka... at gmail.com> wrote:
> Scrollbar *can't* assume that util will be present in its namespace,
> because it won't be unless it imports it. Scrollbar needs to import
> its own dependencies. But why do you think thats a problem?

OK, maybe I'm totally missing something here, but you can't do
"import ../util/common" in Python can you?

Look at the directory structure in my original post. How does
Scrollbar.py import its dependencies from common.py, without relying
on PYTHONPATH?

Martin



From skip at pobox.com  Wed Mar 14 15:21:11 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 14 Mar 2007 14:21:11 -0500
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <1173899640.547531.99260@l75g2000hse.googlegroups.com>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<mailman.5103.1173898419.32031.python-list@python.org>
	<1173899640.547531.99260@l75g2000hse.googlegroups.com>
Message-ID: <17912.19239.431596.566325@montanaro.dyndns.org>

    >> I find "iter<anything>" to be extremely ugly and hope to avoid using
    >> them altogether until they are gone in Py3k.

    Drew> Ugly, maybe, but don't you take a decent performance hit when
    Drew> loading the entire dict into memory at once? Especially if the
    Drew> dict is large?

Sure, but I try hard to keep my dicts small. ;-)

Skip


From arkanes at gmail.com  Tue Mar  6 12:34:25 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 11:34:25 -0600
Subject: Project organization and import
In-Reply-To: <1173201871.742845.84040@t69g2000cwt.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
	<1173199320.094675.58350@p10g2000cwp.googlegroups.com>
	<mailman.4722.1173200207.32031.python-list@python.org>
	<1173201871.742845.84040@t69g2000cwt.googlegroups.com>
Message-ID: <4866bea60703060934g4a20d8bat8a030172c75c2f9@mail.gmail.com>

On 6 Mar 2007 09:24:32 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 6, 8:56 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > Scrollbar *can't* assume that util will be present in its namespace,
> > because it won't be unless it imports it. Scrollbar needs to import
> > its own dependencies. But why do you think thats a problem?
>
> OK, maybe I'm totally missing something here, but you can't do
> "import ../util/common" in Python can you?
>
> Look at the directory structure in my original post. How does
> Scrollbar.py import its dependencies from common.py, without relying
> on PYTHONPATH?
>

It assumes that util.common is a module thats on the PYTHONPATH.

The common way to ensure that this is the case is either to handle
util as a separate project, and install it into the system
site-packages just as you would any third party package, or to have it
(and all your other application packages and modules) off a single
root which is where your your application "base" scripts live.

This, and other intra-package import issues are affected by the
relative/absolute import changes that were begun in Python 2.5, you
can read about them here: http://www.python.org/dev/peps/pep-0328/

Note that using relative imports to import a package that "happens" to
be share a common higher level directory would be frowned upon. The
"blessed" mechanism would still be to use an absolute import, and to
install the other package on the PYTHONPATH in one of any number of
ways.


From lialie at gmail.com  Thu Mar  1 03:03:01 2007
From: lialie at gmail.com (lialie)
Date: Thu, 01 Mar 2007 16:03:01 +0800
Subject: quickly read a formated file?
Message-ID: <45E688B5.1050405@gmail.com>

Hi,
Is there a fine way to read a formated file like:
%HEADER
title = "Untilted"
username = "User"

%DATA
......
......
The formated file may be very popularly, but the module ConfigPaser
doesn't handle it. Is there a way to process it freely?





From gigs at hi.t-com.hr  Thu Mar  8 10:32:26 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 08 Mar 2007 16:32:26 +0100
Subject: Tkinter menu
Message-ID: <esmluc$4bv$1@ss408.t-com.hr>

hi i have create widget with menu bar and menus on it.
when i resize my widget to less than menubar is than from
right to left menus on menubar goes to second row.
who to disable that?
all I want is that when i resize my widget to less size, that menus on 
menubar stays on default position .

thanks i advance


From tinaweb at bestemselv.com  Fri Mar 23 09:46:30 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Fri, 23 Mar 2007 14:46:30 +0100
Subject: Need help to learn Python
In-Reply-To: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
References: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
Message-ID: <IsWdnYjB_MarR57bRVnzvQ@telenor.com>

PythonBiter wrote:
> Hi everyone,
> 
> I'm very new in this Group as well Python language. I want to learn
> Python. So could you please advice me, and guide me how can i become
> master in Python !
> 
> 
> Thanks,
> Partha
> 
Lots of great resources for beginners: 
http://wiki.python.org/moin/BeginnersGuide/NonProgrammers


From gagsl-py2 at yahoo.com.ar  Wed Mar  7 02:06:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 04:06:23 -0300
Subject: Wrong exist status for os.system, os.poepen, etc.
References: <83e8215e0703060739j3cd924c4o8dc19423e8f49055@mail.gmail.com>
	<020401c76083$b4072d60$03000080@hendrik>
Message-ID: <op.tos4oxl1x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 02:50:59 -0300, Hendrik van Rooyen  
<mail at microcorp.co.za> escribi?:

> "Paolo Pantaleo" <paolopantaleo at gmail.com> wrote:
>> >>> import os
>> >>> os.system("/tmp/x")
>> 5120
>>
> 256 times 20 is 5120
> this is a big/little endian little bug

No, it's the old "RTFM" one.

-- 
Gabriel Genellina



From rrs at researchut.com  Fri Mar 16 03:40:27 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Fri, 16 Mar 2007 13:10:27 +0530
Subject: lock problem
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
Message-ID: <b8upc4-cq2.ln1@www.researchut.com>

Leo Kislov wrote:

> You're changing environmental variable __kabc_ldap that is shared
> between your threads. Environment is not designed for that kind of
> usage, it was designed for settings. Either use an option to set
> output file or just redirect stdout. If the interface of ldapsearch is
> so lame that it requires environmental variable use env to set the
> variable: "env __kabc_ldap=/tmp/wrjhdsf ldapsearch ..."

The environment variable is set with temp_file_name which gets the name from
tempfile.mkstemp(), which is run in every thread. So I don't think the
environment variable is going to be the same.

Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"



From rene at korteklippe.de  Thu Mar  1 09:04:55 2007
From: rene at korteklippe.de (=?ISO-8859-1?Q?Ren=E9_Fleschenberg?=)
Date: Thu, 01 Mar 2007 15:04:55 +0100
Subject: django learn
In-Reply-To: <es6kt4$i9b$1@ss408.t-com.hr>
References: <es6kt4$i9b$1@ss408.t-com.hr>
Message-ID: <45e6dd7d$0$23137$9b4e6d93@newsspool1.arcor-online.net>

Hi

Gigs_ schrieb:
> I want to learn to make web pages with django.
> I dont know nothing about HTML.
> 
> How much of HTML I need to know to be able to learn django well?

You need to get a profound knowledge of it, unless you have someone else
who does the HTML/Templating for your project. In that case, you could
probably get away with learning just the basics.

-- 
Ren?


From kyosohma at gmail.com  Thu Mar 29 09:45:04 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 06:45:04 -0700
Subject: Finding User Profile path
In-Reply-To: <mailman.5755.1175174512.32031.python-list@python.org>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>
	<mailman.5745.1175154506.32031.python-list@python.org>
	<1175173141.277735.192020@o5g2000hsb.googlegroups.com>
	<mailman.5755.1175174512.32031.python-list@python.org>
Message-ID: <1175175904.199745.81460@y80g2000hsf.googlegroups.com>

On Mar 29, 8:23 am, Tim Golden <m... at timgolden.me.uk> wrote:
> kyoso... at gmail.com wrote:
> > One of my co-workers thought I could do
> > something like this:
>
> > c = wmi.WMI()
> > for i in c.Win32_UserAccount(Name=user):
> >     # Get user paths somehow.
>
> > I messed around with that, but I think he was mistaken. It has lots of
> > good info, but not what I need.
>
> > I apologize for not being specific. I will look at those win32net
> > functions.
>
> > Mike
>
> Might depend on what you mean by "profile" but would the
> users' homeDirectory/homeDrive active directory attributes
> or the profilePath be of use here? If so, they're fairly
> easy to get hold of.
>
> TJG

Yes. It's the homeDirectory as you say. Once again the IT community's
use of multiple terms for the same thing has bitten me.

Mike



From s99999999s2003 at yahoo.com  Wed Mar 28 21:16:31 2007
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 28 Mar 2007 18:16:31 -0700
Subject: which methods to use?
In-Reply-To: <euf11o$rk6$1@aioe.org>
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
Message-ID: <1175130991.799268.311470@n59g2000hsh.googlegroups.com>

On Mar 29, 8:25 am, Florian Leitner <fleit... at REMcnioOVE.es> wrote:
> * s99999999s2... at yahoo.com wrote, On 3/29/07 2:09 AM:
>
> >   hi
> > which is the best methods to use for list copying. using list() , [:]
> > or create list through list comprehension. what are the differences
> > between these ?
> > thanks
>
> depends on what you intend to do:
>
> -create a new object:
> use a list comprehension or list()
>
> -make a shallow copy:
> use copy.copy() or the slicing operator ([:])
>
> -make a deep copy (incl. each list element):
> use copy.deepcopy()
>
> Try experimenting around, deleting and adding elements or changing them
> in the copy of your list and the original and see what happens if you
> are not sure what these things do. (to use copy, import it first)
>
> flo

thanks.
what do you mean by create new object when using list comprehensoin or
list()? Does using slicing create a new object as well?



From fsckedagain at gmail.com  Thu Mar 29 10:51:22 2007
From: fsckedagain at gmail.com (fscked)
Date: 29 Mar 2007 07:51:22 -0700
Subject: XML/encoding/prolog/python hell...
In-Reply-To: <570b3oF2b2uk9U1@mid.uni-berlin.de>
References: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
	<570b3oF2b2uk9U1@mid.uni-berlin.de>
Message-ID: <1175179882.563945.199760@n59g2000hsh.googlegroups.com>

Here is what I currently have. Still missing prolog information and
namespace info. Encoding is irritating me also. :)

import os,sys
import csv
from elementtree.ElementTree import Element, SubElement, ElementTree,
tostring

def indent(elem, level=0):
    i = "\n" + level*"  "
    if len(elem):
        if not elem.text or not elem.text.strip():
            elem.text = i + "  "
        for elem in elem:
            indent(elem, level+1)
        if not elem.tail or not elem.tail.strip():
            elem.tail = i
    else:
        if level and (not elem.tail or not elem.tail.strip()):
            elem.tail = i

root = Element("boxes")
myfile = open('ClientsXMLUpdate.csv')
csvreader = csv.reader(myfile)

for row in csvreader:
    mainbox = SubElement(root, "box")
    r2 = csv.reader(myfile)
    b = r2.next()
    mainbox.attrib["city"] = b[10]
    mainbox.attrib["country"] = b[9]
    mainbox.attrib["phone"] = b[8]
    mainbox.attrib["address"] = b[7]
    mainbox.attrib["name"] = b[6]
    mainbox.attrib["pl_heartbeat"] = b[5]
    mainbox.attrib["sw_ver"] = b[4]
    mainbox.attrib["hw_ver"] = b[3]
    mainbox.attrib["date_activated"] = b[2]
    mainbox.attrib["mac_address"] = b[1]
    mainbox.attrib["boxid"] = b[0]

indent(root)
ElementTree(root).write('test.xml', "UTF-8")



From gagsl-py2 at yahoo.com.ar  Tue Mar 20 07:01:26 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 08:01:26 -0300
Subject: Load three different modules which have the same name
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
	<mailman.5300.1174338208.32031.python-list@python.org>
	<1174387253.412138.124830@d57g2000hsg.googlegroups.com>
Message-ID: <op.tphh8otvx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Tue, 20 Mar 2007 07:40:53 -0300, abcd <codecraig at gmail.com> escribi?:

>> Blerch! Why not just call the modules by the right names in the first
>> place? Then each will have its own sys.modules entry for a start ...
>
> what do i need to do?  also, is there a way I can load each one as I
> have but each one have its own unique entry in sys.modules?  For
> example i could load Person from Person (in alpha) as, "Person_Alpha"
> or something like that in sys.modules?  not sure how I might do that.

Use the "as" clause when importing; it's almost the same phrase you wrote  
above:
 from alpha.Person import Person as Person_Alpha
or something like that.
alpha should be a package, as someone already said.

-- 
Gabriel Genellina



From eric.brunel at pragmadev.com  Mon Mar 12 04:38:58 2007
From: eric.brunel at pragmadev.com (Eric Brunel)
Date: Mon, 12 Mar 2007 09:38:58 +0100
Subject: UTF-8
References: <mailman.4899.1173535209.32031.python-list@python.org>
Message-ID: <op.to2ia8ldyvwwzh@ericb.pragmadev>

On Sat, 10 Mar 2007 15:00:04 +0100, Olivier Verdier <chtito at gmail.com>  
wrote:
[snip]
> The default encoding i wish to set is UTF-8 since it encodes unicode and  
> is nowadays the standard encoding.

I can't agree with that: there are still many tools completely ignoring  
the encoding problem, and just saving sequences of bytes for any text.  
This results in letting the current OS deciding what encoding is used, and  
this is still not always UTF-8. Just consider how many web pages are still  
encoded in a local encoding without even any specification of what it may  
be in the HTML header, or how many times you see a [?] or a black square  
replacing a character in newsgroups or mailing lists. UTF-8 *should* be  
the standard encoding, but certainly isn't...

> Having ascii as a default encoding is a pretty strange choice since  
> ascii encodes only 127 characters (suitable only for English, without  
> fancy symbols like ?) whereas utf-8 encodes virtually infinitely many  
> characters (suitable for all languages). Besides, utf-8 is a superset of  
> ascii so having it by default won't harm anything.

On the contrary, it's IMHO a very sensible thing to do: any character with  
a code > 127 could be in any encoding. So supposing an encoding would be  
guessing, and part of the Python Zen is: "in the face of ambiguity, refuse  
the temptation to guess". The problem is here that if the encoding is not  
UTF-8, things can seem to work, but give completely wrong results. So the  
decision was apparently to use the minimal common set for everything,  
which is ASCII; this seems quite logical to me.

(BTW, one could even argue that the default encoding should be  
non-existent, as I think there are some non-latin encodings that do not  
even include ASCII [I think I saw a Chinese encoding like that one  
day...]. So even supposing that ASCII will work is sometimes wrong...)

> At the very least there should be a configuration file that allows to  
> set a default encoding (although setting anything else than utf-8 should  
> be advised against). Such a feature would be greatly appreciated by all  
> of us non native English speakers around the world.

Well, I *am* a non-native English speaker, and after the first "why should  
I bother about all this encoding stuff?" period, which seems to happen to  
everybody, I finally understood the logic behind Python choices, and why I  
*should* bother about encodings. Whatever the default encoding is, and  
whatever you do, encodings will still be a problem for some time. The  
transition phase from local encodings to universal ones is likely to last  
a few years more, if not a few decades...

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From Thomas.Ploch at gmx.net  Wed Mar 14 15:19:20 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Wed, 14 Mar 2007 20:19:20 +0100
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <et9h7k$ehr$1@sea.gmane.org>
References: <45F843AD.6050509@gmx.net> <et9h7k$ehr$1@sea.gmane.org>
Message-ID: <45F84AB8.2010504@gmx.net>

Steve Holden schrieb:
> Clearly if form['uploadfile'] is returning the client's path information 
> you do have to remove that somehow before further processing, which also 
> means you need to deduce what the client architecture is to correctly 
> remove path data. Of course this also leaves open the question "what 
> does a Mac client return?", and you might want to cater for that also.

I tested from linux and Mac OS, and on both os.path.basename() works as
expected (since the server it runs on is a UNIX one). That brings me to
the question, how Do I a) get the cients architecture and b) send the
architecture of the client through cgi.FieldStorage()?

> I suspect you will also find that there are at least some circumstances 
> under which a Unix browser will also include path information.

Which ones should that be? Since os.path.basename() _is_ doing the right
thing on *nix style paths (Mac OS is not different there), I cant think
of other circumstances.


> I presume you are looking to use the same filename that the user 
> provided on the client? Does this mean that each user's files are 
> stored in different directories? Otherwise it's not always a good idea 
> to use filenames provided by the user for files on the server anyway.

Yes, each User has his own directory. Files get timestamped and then put
into the corresponding directory. It is just that having
'C:\a\very\long\path\file.ext' as a filename on the server is not nice.

Thomas



From cga2000 at optonline.net  Fri Mar 16 22:04:18 2007
From: cga2000 at optonline.net (cga2000)
Date: Fri, 16 Mar 2007 21:04:18 -0500
Subject: Mastering Python
In-Reply-To: <1174055241.079644.160750@e1g2000hsg.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
	<1174055241.079644.160750@e1g2000hsg.googlegroups.com>
Message-ID: <20070317020418.GA3542@turki.gavron.org>

On Fri, Mar 16, 2007 at 09:27:21AM EST, BartlebyScrivener wrote:
> On Mar 16, 8:39 am, "Paul McGuire" <p... at austin.rr.com> wrote:
> >
> > Wow, are you still reading?  Quit wasting time and go download a
> > Python dist and get started already!
> >
> 
> I think you should extract that and spend twenty minutes tidying it up
> and then publish it to the Python for Programmers page or make it a
> downloadable .pdf.

Not sure where it should go.  

Perhaps add a little nook and cranny link named "facts & advocacy".

I'm only an occasional user of Python and admittedly not as well-read as
many on this list .. but I must say that this is the first time I run
into something that so clearly states what makes Python stand apart from
those other ..  er ..  "difficult" .. should I say ..  languages.

Make it a wiki so everyone can add his two cents?

Start a DocBook, LaTex, CSS.. competition and turn it into some kind of
marketing tool with all the trimmings?

In any event it would be a shame to waste it.

Thanks,
cga



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 17 19:45:18 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 18 Mar 2007 10:45:18 +1100
Subject: formatting strings to have the same width
References: <1174172864.205137.193740@y66g2000hsf.googlegroups.com>
Message-ID: <pan.2007.03.17.23.45.16.968087@REMOVE.THIS.cybersource.com.au>

On Sat, 17 Mar 2007 16:07:44 -0700, spohle wrote:

> hi,
> 
> i got random strings and wanna attach a " |  " at the end. now if i
> print them i want the | to always be underneath each other. example
> code:
> 
> foo = ["aaa", "1232"]
> for each in foo:
> 
> print foo[0].center(10, " ") + " | "
> foo2 = "1232"
> print foo2.center(10, " ") + " | "
> 
> even though i define a constant width on the strings the | don't show
> up underneath each other.
> any ideas ?

Three possibilities:

(1) Your code is fine, but whatever you are using to display the strings
is wrong because it is using the wrong sort of font.

What font are you using? If it is a proportional font, e.g. Times New
Roman, then each different character is a different width, and counting
characters is not likely to result in equal widths.

e.g. compare these two lines:

mw mw mw mw mw |
il il il il il |

If the vertical bars line up, you're (probably) using a fixed-width font
like Courier. If they're not, you're (probably) using a proportional font
like Ariel or Times.


(2) Your code is fine, but your data is bad. 

You are centering your strings with a width of ten. Is it possible that
some of the strings you are passing into the are longer than ten
characters? If so, you'll get funny results, because str.center() will
never shorten the string you pass it.


(3) You code in Python like you write in English: poorly with lots of
errors. "Wanna" isn't a word (unless you're trying to be funny), and
capitalization is the difference between:

I helped my Uncle Jack off a horse

and 

I helped my uncle jack off a horse.

After fixing your indentation error, your example code works perfectly
for me. Perhaps your real code is different, and part of the difference
causes the problem? For instance, your example code seems to do something
unlikely to be useful:

foo = ["aaa", "1232"]
for each in foo:
    print foo[0].center(10, " ") + " | "

That prints the FIRST item each time around the loop, instead of each item.

Also, you don't need the second argument to center. By default, space is
used as a fill character.



-- 
Steven.



From paul at boddie.org.uk  Wed Mar 28 08:54:56 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 28 Mar 2007 05:54:56 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175083955.167868.88610@n76g2000hsh.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
Message-ID: <1175086435.174354.65640@l77g2000hsb.googlegroups.com>

On 28 Mar, 14:12, "Kay Schluehr" <kay.schlu... at gmx.net> wrote:
>
> A somewhat unrelated question. With Py3K Python gets optional type
> annotations.

No, I believe the consensus is that Python 3000 gets optional
annotations which aren't specifically for type information... nudge
nudge, wink wink! That last part is important, because that's also how
many other people have interpreted this particular feature. I seem to
recall that some of the PyPy people weren't interested in static
analysis [1], so I'm skeptical about whether type annotations are
their kind of thing, either. That said, I imagine that the handling of
metadata (including type details) is an element in the way RPython
works, but I also imagine that things get more complicated as such
metadata diverges from plain type information and into arbitrary
"observations" about other aspects of program behaviour.

Still, I'd like to see the PyPy people stick their necks out and
answer your questions. ;-)

Paul

[1] http://codespeak.net/pipermail/pypy-dev/2007q1/003607.html



From devrim.erdem at gmail.com  Fri Mar 30 10:25:03 2007
From: devrim.erdem at gmail.com (DE)
Date: 30 Mar 2007 07:25:03 -0700
Subject: Indentation for code readability
In-Reply-To: <Xns99039BD4762EFduncanbooth@127.0.0.1>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<Xns99039BD4762EFduncanbooth@127.0.0.1>
Message-ID: <1175264703.412795.123550@r56g2000hsd.googlegroups.com>

Thanks Duncan. I guess you and Peter have been typing in the same
minute :) It really looks like a good solution, I wasn't aware this
with statement in Python. I can imagine the context handler coming
handy in other cases too.

Devrim



From likwoka at gmail.com  Tue Mar  6 11:58:43 2007
From: likwoka at gmail.com (Alex Li)
Date: 6 Mar 2007 08:58:43 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
Message-ID: <1173200323.696497.139590@c51g2000cwc.googlegroups.com>

Thanks all for your suggestions.

Nick: I am trying to avoid generate the dot file manually so that I
can minimize bugs coz by me ;)

SPE: Unfortunately that may be too radical ;)  I work in a corporate
environment (read: MS shop) and my group wants to generate a
dependency graph of our system.  I was trying to take this opportunity
to introduce some python to the group.  They were amazed when I came
up with the script in a few hours and were willing to try it out by
installing python, yapgvb, and graphviz.  But it won't work on python
2.5!  It's kind of a bummer to tell them to install an older version
of python.

On second look, I will try pydot again.  Despite no release for a long
time, it seems to be reasonably complete.  Now, I am sure we will redo
it in C# after my "prototype"; but that will just prove the advantages
of python in terms of code size and productivity :)




From bearophileHUGS at lycos.com  Wed Mar 21 16:50:29 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Mar 2007 13:50:29 -0700
Subject: parsing combination strings
In-Reply-To: <46019843$0$15530$426a74cc@news.free.fr>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
	<mailman.5416.1174504434.32031.python-list@python.org>
	<1174504721.913698.178380@e1g2000hsg.googlegroups.com>
	<46019843$0$15530$426a74cc@news.free.fr>
Message-ID: <1174510229.357049.240660@y66g2000hsf.googlegroups.com>

Bruno Desthuilliers:
> exp = re.compile(r'^([0-9]+)')
> for s in ["12ABA", "1ACD", "123CSD"]:
>      print exp.match(line).group(0)

This may be enough too:

exp = re.compile(r'\d+')
for s in ["12ABA", "1ACD", "123CSD"]:
    print exp.match(line).group(0)

With it:
exp.match("a123CSD") = None

Bye,
bearophile



From facundo at taniquetil.com.ar  Tue Mar 20 13:00:39 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Tue, 20 Mar 2007 17:00:39 +0000 (UTC)
Subject: if __name__ == 'main':
References: <1174409383.842776.264350@b75g2000hsg.googlegroups.com>
Message-ID: <etp3vl$i0b$1@sea.gmane.org>

gtb wrote:


> I often see the following 'if' construct in python code. What does
> this idiom accomplish? What happens if this is not main? How did I get
> here if it is not main?
> ...
> if __name__ == 'main':
>    myQuest('myQuest').Run()

This idiom is for executing the code if you're running the .py directly,
or doing nothing if you're just "import"ing the module. 

Take note, that when you import a module, __name__ gets the module name.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From theller at ctypes.org  Thu Mar 22 13:10:00 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 22 Mar 2007 18:10:00 +0100
Subject: Technical Answer - Protecting code in python
In-Reply-To: <VAyMh.35$ek6.24@newsfe12.lga>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>	<1tkMh.115$mG4.94@newsfe12.lga>	<pan.2007.03.22.07.07.29.369580@REMOVEME.cybersource.com.au>
	<VAyMh.35$ek6.24@newsfe12.lga>
Message-ID: <etud99$rna$1@sea.gmane.org>

Bart Willems schrieb:
> Aaah, *now* we're getting somewhere... :-)
> 
>>> All he wants is something that turns 'readable, 
>>> changeable python' into 'unreadable, immutable python'.
>> 
>> chown scriptuser script.py  # a unique user
>> chmod a-rwx script.py
>> chmod u+rx script.py
>> 
>> I believe that fully meets the functional requirements. Where shall I send
>> the invoice?
> 
> If it works on the target machine - I am under the assumption that the 
> client is some kind of government office - more likely to run Windows 
> than it is to run unix/linux/etc.
> 
> Who has a similar solution for windows?

python -m py_compile script.py
del script.py

Thomas



From paul at boddie.org.uk  Sun Mar  4 17:26:42 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 4 Mar 2007 14:26:42 -0800
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <1173038307.594909.292330@s48g2000cws.googlegroups.com>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
	<IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
	<1173038307.594909.292330@s48g2000cws.googlegroups.com>
Message-ID: <1173047202.430201.240360@30g2000cwc.googlegroups.com>

MonkeeSage wrote:
>
> The configure script checks for libraries and headers that are
> required for a base build, and (according to the options passed to
> configure, or using the defaults) optional components. There is NO WAY
> for it to know which PACKAGES, on any of the 500 linux distributions,
> provide those libs and headers.

True, but it would be nice to be able to do a configure --with-some-
library[=path] and have it give an error if that library isn't found.
A lot of tests for specific libraries and headers exist in the
autoconf universe, and it's also possible to write custom tests. Of
course, this may be academic since distutils has apparently taken over
a lot of the work concerning optional modules.

> That is the job of the PACKAGER, or
> (gasp) the end user if you use a distro without a package system or
> trying to build from raw source. There is no passing the buck. If a
> package is broken, the packager must fix it. If the source is broken,
> the developer must fix it.

I guess if you're building from source, you're the packager, yes.
These days when I can't find up-to-date packages for my aging
distribution, I actually seek out such packages for newer
distributions and backport them, mostly because the dependencies have
been worked out by someone else. In such circumstances, I'm the
packager but I'm using a package infrastructure, as opposed to having
to do a lot of the hard work myself.

Paul



From a.schmolck at gmail.com  Sat Mar 31 19:45:16 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 01 Apr 2007 00:45:16 +0100
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
Message-ID: <yfsirchf04z.fsf@oc.ex.ac.uk>

"Luis M. Gonz?lez" <luismgz at gmail.com> writes:

> On Mar 31, 8:38 am, Bjoern Schliessmann <usenet-
> mail-0306.20.chr0n... at spamgourmet.com> wrote:
> > Mark Dufour wrote:
> > > Shed Skin allows for translation of pure (unmodified), implicitly
> > > statically typed Python programs into optimized C++, and hence,
> >
> >                                                            ^^^^^> highly optimized machine language.
> >
> >   ^^^^^^^^^^^^^^^^
> >
> > Wow, I bet all C++ compiler manufacturers would want you to work for
> > them.
> >
> > Regards,
> >
> > Bj?rn
> >
> > --
> > BOFH excuse #23:
> >
> > improperly oriented keyboard
> 
> 
> Mark has been doing an heroic job so far.
> Shedskin is an impressive piece of software and, if pypy hadn't been
> started some time ago, it should have gotten more attention from the
> community.

Regardless of its merrits, it's GPL'ed which I assume is an immediate turn-off
for many in the community.

'as


From greg at cosc.canterbury.ac.nz  Thu Mar 29 09:05:12 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 30 Mar 2007 01:05:12 +1200
Subject: Weird gcc behaviour with function pointer types
Message-ID: <571s0vF2aird9U1@mid.individual.net>

In my quest to eliminate C compiler warnings from
Pyrex output, I've discovered some utterly bizarre
behaviour from gcc 3.3.

The following code:

   void g(struct foo *x) {
   }

   void f(void) {
     void (*h)(struct foo *);
     h = g;
   }

produces the following warning:

   blarg.c: In function `f':
   blarg.c:6: warning: assignment from incompatible pointer type

However, adding the following line at the top:

   typedef struct foo Foo;

makes the warning go away. The mere *presence* of
the typedef is all that's needed -- it doesn't even
have to be used.

This looks like a bug in gcc to me -- what do people
think?

--
Greg


From timr at probo.com  Wed Mar 28 03:03:29 2007
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 Mar 2007 07:03:29 GMT
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916449.171929.138950@n76g2000hsh.googlegroups.com>
	<pan.2007.03.26.22.17.16.194451@REMOVE.THIS.cybersource.com.au>
Message-ID: <2e4k03l8tj9oicmn8c21vobrnvkmdstabr@4ax.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:

>On Mon, 26 Mar 2007 06:40:49 -0700, kyosohma wrote:
>
>> Fortran also appears to be a compiled language, whereas Python is an
>> interpreted language.
>
>Sheesh. Do Java developers go around telling everybody that Java is an
>interpreted language? I don't think so.
>
>What do you think the "c" in ".pyc" files stands for? "Cheese"?

Well, I'm being a bit argumentative here, but it's hard to deny that the
use of "compiled" in the context of .pyc (or .javac) is very different from
the use of "compiled" in the context of running gcc.  Once upon a time,
Basic enthusiasts would have used the word "tokenized" to describe .pyc
files.

A .pyc file is, in fact, interpreted by an intermediate language
interpreter.  I don't understand why anyone would be embarrassed by that.
Is it fast enough?  It certainly is for MY needs.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 15:36:28 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 17:36:28 -0300
Subject: worker thread catching exceptions and putting them in queue
References: <45ec4936$0$323$e4fe514c@news.xs4all.nl>
	<espdoi$t2l$1@panix3.panix.com>
Message-ID: <op.tov0u3gxx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 08 Mar 2007 13:31:14 -0300, Aahz <aahz at pythoncraft.com> escribi?:

> In article <45ec4936$0$323$e4fe514c at news.xs4all.nl>,
> Paul Sijben  <paul.sijben at xs4all.nl> wrote:
>>
>> in a worker thread setup that communicates via queues is it possible to
>> catch exceptions raised by the worker executed, put them in an object
>> and send them over the queue to another thread where the exception is
>> raised in that scope?
>
> One caution: because exceptions keep stack frames alive, you can have
> garbage collection problems.  Make sure to del the exception when you're
> done with it.

Note that it's the traceback who keeps stack frames alive, not the  
exception itself (at least on the current Python versions, might change in  
the future). If no fancy processing of the traceback is needed, maybe  
converting it to string (using the traceback module) before posting it to  
the queue is enough.

-- 
Gabriel Genellina



From laurent.pointal at limsi.fr  Fri Mar 30 03:56:50 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 30 Mar 2007 09:56:50 +0200
Subject: Remote XML Parsing
In-Reply-To: <1175238860.680426.134400@y80g2000hsf.googlegroups.com>
References: <1175238860.680426.134400@y80g2000hsf.googlegroups.com>
Message-ID: <euifrk$fv3$1@news2.u-psud.fr>

pyapplico at gmail.com a ?crit :
> How can I parse a remote XML file with Python?
> And what will I be able to do with this XML file in Python?
> 
> Sorry if this is a noob-ish question.

You can process XML data with Python as long as you can get it - you
will be able to do what you want with it.

How do you access your remote file ?

...more details would be wellcome...




From mblume at socha.net  Sat Mar 17 06:12:40 2007
From: mblume at socha.net (Martin Blume)
Date: Sat, 17 Mar 2007 11:12:40 +0100
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<1174075809.968650.96030@e1g2000hsg.googlegroups.com>
Message-ID: <45fbbf18$0$3816$5402220f@news.sunrise.ch>

"7stud" schrieb 
> How about:
> 
> -----------
> x = [0, 100, 200, 1000]
> y = -1
> inserted = False
> 
> for i in range(len(x)):
>         if(y <= x[i]):
>                 x.insert(i, y)
>                 inserted = True
>                 break
> if(not inserted): x.append(y)
> 
> print x
> ------------
>

You can get rid of the sentinel "inserted" using the 
else clause of the for loop:

for i in range(len(x)):
        if (y <= x[i]):
                x.insert(i, y)
                break
else: x.append(y)

Python is cool :-)

IMHO. HTH.
Martin


 



From tobiaskk at mac.com  Fri Mar 16 15:05:04 2007
From: tobiaskk at mac.com (tobiaskk at mac.com)
Date: Fri, 16 Mar 2007 20:05:04 +0100
Subject: Finding the insertion point in a list
In-Reply-To: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
Message-ID: <79E19058-8F4A-4DCD-AA6C-E15C623F4C34@mac.com>

Or like this:

	x = [0, 100, 200, 1000]
	y = 435
	for n, i in enumerate(x):
	    if y < i:
         	n = n - 1
	        break
	x.insert(n + 1, y)

If you decide to stick with

	n = sum ( y>x[i] for i in range(len(x)) ) - 1

Replace it with:

	n = sum(y > i for i in x) - 1

Tobias K.



From sri1025 at gmail.com  Thu Mar 22 09:00:01 2007
From: sri1025 at gmail.com (Srikanth)
Date: 22 Mar 2007 06:00:01 -0700
Subject: Removing a particular index from a list
Message-ID: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>

Hi,

list.remove(item) removes the first item from the list, but how do I
say to remove a particular index from a list without using it's value?

Let's say I have 4 items in my list as

>>> li = ["sri", "s", "srikanth", "s"]

And if I want to remove the last item ("s"), how do I remove it?
li.remove(-1) doesn't do it. This is my problem.

Thanks,
Srikanth



From steve at REMOVE.THIS.cybersource.com.au  Sun Mar  4 08:47:37 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 05 Mar 2007 00:47:37 +1100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
	<1172979629.812957.156820@i80g2000cwc.googlegroups.com>
	<mailman.4647.1173011758.32031.python-list@python.org>
Message-ID: <pan.2007.03.04.13.47.36.717482@REMOVE.THIS.cybersource.com.au>

On Sun, 04 Mar 2007 07:36:50 -0500, Nicholas Parsons wrote:

> Hi Jordan,
> 
> That is true what you say about pop() behavior with stack-like  
> objects.  But the definition of pop() for a stack-like structure is  
> stronger than that.

That's okay, we're not talking about pop for stack-like structures, we're
talking about pop for dictionaries.


> A stack is a LIFO data structure.  Therefore the  
> pop() operation is defined to not only mutate the receiver and return  
> the item popped but also ensure that the LAST item in the stack is  
> removed.

Not so. Pop can also be defined to take an argument telling the data
structure (not necessarily a stack) which item to remove.

Pop can also operate on queues, in which case it removes the FIRST item in
the queue.

Pop can also be defined for dequeues (double-ended queue), in which case
it can remove from either the first or the last position.

Pop can also be defined for balloons, which is what they do when you stick
a pin in them.



> This makes perfect sense for a list type in python since  
> lists are mutable sequences that have a specified order.  But for  
> dictionaries this does not hold since they are unordered sequences by  
> definition.  

That's okay, since unordered sequences can define pop too. Obviously pop
for a dictionary has to be defined slightly differently, but the essential
characteristics -- remove an item and return it -- remain the same.


> So for dictionaries it would not make sense for a  
> programmer to simulate a stack-like type.

Dictionaries don't simulate stacks.

We can talk about pushing a value onto a stack, and about pushing a
value into a register, and yet registers are not stacks. We use the
same word, multiply, for both scalar multiplication (3*5=15), matrix
multiplication, and mixed scalar-to-matrix multiplication, even though
they are quite different. (For starters, XY = YX if X and Y are both
scalars, but not if they are matrices.)

We use "concatenate" to describe the different procedures of joining
linked lists, arrays and strings. We talk about "inserting" into linked
lists, B-trees, heaps, arrays and priority queues.

Why shouldn't we talk about popping a value from a dictionary?


> While we're on the subject I'm also curious as to why the author of  
> the built-in list class called the method "append" to add an element  
> to the end of a list and not something like "push".

Well, gosh, I really don't know what they were thinking, using "append" as
the name of the method that, um, APPENDS an item to the end of a list. How
confusing is that?


> But this is not  
> really much of a problem if the programmer could create an alias for  
> it.

It isn't a problem at all.



-- 
Steven.



From joshua at eeinternet.com  Wed Mar 21 15:28:06 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 21 Mar 2007 11:28:06 -0800
Subject: python QT or python-GTK
References: <45fdb561$0$17201$4c368faf@roadrunner.com>
	<CFkLh.128940$_73.66143@newsread2.news.pas.earthlink.net>
Message-ID: <46017ac9$0$16316$88260bb3@free.teranews.com>

Dennis Lee Bieber wrote:

> On Sun, 18 Mar 2007 11:55:47 -1000, "Jon Van DeVries"
> <j23212 at hotmail.com> declaimed the following in comp.lang.python:
> 
>> ** All the posts found in google are old.  I'm assuming new improvements
>> have been made to both IDEs. **
>> 
>> Please correct me if I'm wrong, I'm a newbie.
>> 
>> 1. Which one of them requires fewer lines to accomplish the same thing?
>> from what I understand QT it's just like Borland J-Builder. Meaning, you
>> want a button, you draw it, then you double-click on it, a window opens
>> up and you type events and behavior. And with GTK, you just type
>> everything.
>>
> For the most part, none of the GUI TOOLKITS (not IDEs) includes a
> drag&drop GUI BUILDER. Toolkits are libraries defining an API (in the
> case of Python to an underlying toolkit... wxPython is the Python
> front-end to wxWidgets). For all the toolkits, the basic operation is
> "just type everything" -- an intermediate mode is where one manipulates
> a configuration file that gets loaded at run-time, and which one
> registers handlers against (my largest GUI application was 15 years ago,
> emulating a Ramtek graphics engine using DECWindows -- it had
> multi-thousand lines of config file in xt; the config file was nearly as
> long as the C code that used it).

I'm not sure if you're referring to something else, or aren't aware of Qt
Designer.  You can design your GUI's in the designer, run py-uic (comes
with PyQt) and you have python code for your GUI.  You then load that up,
and do your custom slot connections at run time.  You can also take the XML
files generated by Qt Designer and load and render them at runtime too.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From bignose+hates-spam at benfinney.id.au  Tue Mar  6 16:58:13 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 07 Mar 2007 08:58:13 +1100
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
	<45ed41f7$0$21515$426a74cc@news.free.fr>
	<1173198244.092412.17400@n33g2000cwc.googlegroups.com>
Message-ID: <87wt1uyqyy.fsf@benfinney.id.au>

"Martin Unsal" <martinunsal at gmail.com> writes:

> I think you should be asking yourselves, "Did we all abandon reload()
> because it is actually an inferior workflow, or just because it's
> totally broken in Python?"

I never "abandoned reload()", because it never even occurred to me to
use the interpreter for developing the code that I know is going to
end up in a file anyway. That's what my text editor is for.

-- 
 \        "I have a microwave fireplace in my house. The other night I |
  `\   laid down in front of the fire for the evening in two minutes." |
_o__)                                                 -- Steven Wright |
Ben Finney



From bdesth.quelquechose at free.quelquepart.fr  Sun Mar  4 16:14:31 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 04 Mar 2007 22:14:31 +0100
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <1172894223.669617.79060@31g2000cwt.googlegroups.com>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45e8c931$0$8646$426a34cc@news.free.fr>
	<1172894223.669617.79060@31g2000cwt.googlegroups.com>
Message-ID: <45eb2ec4$0$26053$426a74cc@news.free.fr>

John Machin a ?crit :
> On Mar 3, 12:36 pm, Bruno Desthuilliers >
> [snip]
> 
>>     DATE = 5
>>     TARGET = 6
> 
> [snip]
> 
>>Now for the bad news: I'm afraid your algorithm is broken : here are my
>>test data and results:
>>
>>input = [
>>     #ID  STATE ...  ...  ... TARG DATE
>>     "aaa\tAAA\t...\t...\t...\tBBB\t20071212\n",
> 
> [snip]
> 
> Bruno, The worse news is that your test data is broken.

Re-reading the OP's specs, the bad news is that my only neuron left is 
broken. Shouldn't code at 2 o'clock in the morning :(


From gregturn at mindspring.com  Wed Mar 28 16:19:17 2007
From: gregturn at mindspring.com (Goldfish)
Date: 28 Mar 2007 13:19:17 -0700
Subject: newbi question on python rpc server, how it works?
In-Reply-To: <gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>
References: <mailman.5720.1175107122.32031.python-list@python.org>
	<gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>
Message-ID: <1175113157.444584.166910@y80g2000hsf.googlegroups.com>

> > I have a need where I need to create a layer of business logic that
> > will connect to mysql database at one end and a wxpython based thin
> > client at the other end.

Spring Python offers something similar (http://springpython.python-
hosting.com/wiki/DistributedRemoting) to link up clients withs
servers. You can code locally, and then when it is time to split
things up between different workstations, you can reconfigure the
networking.

There is a demo application, PetClinic (http://springpython.python-
hosting.com/wiki/PetClinic) that shows a database component, remoting
pieces, and finally a front end. The current version of PetClinic is a
web app. In the near future, we are planning to build a wxPython front
end to show more reusability of components.



From bearophileHUGS at lycos.com  Thu Mar  1 06:02:36 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Mar 2007 03:02:36 -0800
Subject: Tuples vs Lists: Semantic difference (was: Extract String From
	Enclosing Tuple)
In-Reply-To: <1172727871.032664.165240@j27g2000cwj.googlegroups.com>
References: <slrneubq5t.1j3.rshepard@salmo.appl-ecosys.com>
	<87slcqvskr.fsf@benfinney.id.au>
	<mailman.4538.1172705434.32031.python-list@python.org>
	<54ms6fF21c6h3U2@mid.individual.net>
	<mailman.4550.1172720725.32031.python-list@python.org>
	<1172727871.032664.165240@j27g2000cwj.googlegroups.com>
Message-ID: <1172746956.836438.53470@p10g2000cwp.googlegroups.com>

George Sakkis, I agree with the things you say.
Sometimes you may have a sequence of uniform data with unknown len (so
its index doesn't have semantic meaning). You may want to use it as
dict key, so you probably use a tuple meant as just an immutable list.
I don't know Ruby, but I think it allows such purposes with a freezing
function.

Bye,
bearophile



From jeba_ride at yahoo.com  Sat Mar 10 14:46:32 2007
From: jeba_ride at yahoo.com (Clement)
Date: 10 Mar 2007 11:46:32 -0800
Subject: Help on Dict
In-Reply-To: <pan.2007.02.26.06.58.33.493117@REMOVEME.cybersource.com.au>
References: <1172426014.539055.300330@j27g2000cwj.googlegroups.com>
	<YpmEh.1332$jx3.1308@newssvr25.news.prodigy.net>
	<mailman.4393.1172471167.32031.python-list@python.org>
	<pan.2007.02.26.06.58.33.493117@REMOVEME.cybersource.com.au>
Message-ID: <1173555992.697337.222390@n33g2000cwc.googlegroups.com>

On Feb 26, 11:58 am, Steven D'Aprano
<s... at REMOVEME.cybersource.com.au> wrote:
> On Mon, 26 Feb 2007 07:15:43 +0200, Hendrik van Rooyen wrote:
> >  "James Stroud" <jstr... at mbi.ucla.edu> wrote:
>
> >> Clement wrote:
> >> > Can any body tell how Dict is implemented in python... plz tell what
> >> > datastructure that uses................
>
> >> I think it uses a dict.
>
> > "Groan!" - this answer is like Microsoft documentation -
> > while technically correct, it is useless...  : - )
>
> Which I think was deliberate. The Original Poster asked a reasonable
> question in a stupid way (Python is case-insensitive -- are we supposed
> to guess what a Dict is? what language is 'plz'?), and I believe James
> deliberately gave a stupid answer to highlight that.
>
> class Dict(dict):
>     pass
>
> is what I thought of when I saw the question. I guess James might have
> thought the same way.
>
> Unfortunately, more often than not, the sort of person who uses 'plz' in
> an email probably isn't going to recognise the subtleties of James' reply.
>
> --
> Steven D'Aprano

ada koothingala



From gtcopeland at gmail.com  Tue Mar 20 12:23:38 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 20 Mar 2007 09:23:38 -0700
Subject: Freezing Python Apps on Linux?
Message-ID: <1174407818.180395.18480@n76g2000hsh.googlegroups.com>

I seem to recall several different applications which can create
standalone binaries for python on Linux.  I know freeze.py and
cx_Freeze.py exist.  Are these still the preferred methods of creating
a stand alone binary out of a python application on Linux?

Greg



From kw at codebykevin.com  Tue Mar 27 10:07:22 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Tue, 27 Mar 2007 10:07:22 -0400
Subject: Use threads or Tkinter event loop?
In-Reply-To: <ccd8f$460924a2$4275d90a$15349@FUSE.NET>
References: <ccd8f$460924a2$4275d90a$15349@FUSE.NET>
Message-ID: <11624$4609251b$4275d90a$15349@FUSE.NET>

Kevin Walzer wrote:
> I'm trying to decide whether I need threads in my Tkinter application or 
> not. My app is a front end to a command-line tool; it feeds commands to 
> the command-line program, then reads its output and displays it in a 
> Tkinter text widget. Some of the commands are long-running and/or return 
> thousands of lines of output.
> 
> I initially thought I needed to use threading, because the GUI would 
> block when reading the output, even when I configured the blocking to be 
> non-blocking. I got threading to work, but it seemed a bit complicated. 
> So, I decided to try something simpler, by using the Tkinter event loop 
> to force the output to update/display.
> 
> it seems to work well enough. Here is my threaded code:
> 
> non-threaded:
> 
> def insertDump(self):
>  self.finkinstalled = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
>         for line in self.finkinstalled:
>             self.t.insert(END, line)
>             self.update()
>             self.t.see(END)
> 
> And here is my non-threaded code (needs two functions to work)
> 
>  def insertDump(self):
>         try:
>             data = self.dataQueue.get(block=False)
>             for line in data:
>                 self.t.insert(END, line)
>                 self.t.see(END)
>                 self.update()
> 
> 
>         except:
>             print "error"
>             raise
> 
>     def getDump(self):
> 
>         self.file = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
>         self.dataQueue.put(self.file)
> 
> This brings me to a design, as opposed to coding, question. The 
> non-threaded version seems to work just as well as the threaded one, in 
> terms of speed. Moreover, it is simpler to code and debug, because I 
> don't have to check to make sure the thread queue has data (I sometimes 
> get an 'Empty' error message when I first start the thread).  Simply 
> using the Tk event loop (self.update) is also how I would have coded 
> this in Tcl.
> 
> So my question is this: under what circumstances in Python are threads 
> considered "best practice"? Am I wrong to use the Tk event loop instead 
> of threads?
> 

D'oh, I got the code snippets mixed up:

non-threaded:

def insertDump(self):
  self.finkinstalled = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
         for line in self.finkinstalled:
             self.t.insert(END, line)
             self.update()
             self.t.see(END)

threaded:

  def insertDump(self):
         try:
             data = self.dataQueue.get(block=False)
             for line in data:
                 self.t.insert(END, line)
                 self.t.see(END)
                 self.update()


         except:
             print "error"
             raise

     def getDump(self):

         self.file = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
         self.dataQueue.put(self.file)

Sorry!
-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From jgodoy at gmail.com  Sun Mar  4 20:20:08 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 04 Mar 2007 22:20:08 -0300
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
Message-ID: <87mz2s32rb.fsf@gmail.com>

"Martin Unsal" <martinunsal at gmail.com> writes:

> 1) Namespace. Python wants my namespace heirarchy to match my filesystem
> heirarchy. I find that a well organized filesystem heirarchy for a
> nontrivial project will be totally unwieldy as a namespace. I'm either
> forced to use long namespace prefixes, or I'm forced to use "from foo import
> *" and __all__, which has its own set of problems.

I find it nice.  You have the idea of where is something just from the import
and you don't have to search for it everywhere.  Isn't, e.g., Java like that?
(It's been so long since I last worried with Java that I don't remember if
this is mandatory or just a convention...)

You might get bitten with that when moving files from one OS to another,
specially if one of them disconsider the case and the other is strict with
it. 

> 1a) Module/class collision. I like to use the primary class in a file as the
> name of the file. However this can lead to namespace collisions between the
> module name and the class name. Also it means that I'm going to be stuck
> with the odious and wasteful syntax foo.foo everywhere, or forced to use
> "from foo import *".

Your classes should be CamelCased and start with an uppercase letter.  So
you'd have foo.Foo, being "foo" the package and "Foo" the class inside of it.

> 1b) The Pythonic way seems to be to put more stuff in one file, but I
> believe this is categorically the wrong thing to do in large projects.  The
> moment you have more than one developer along with a revision control
> system, you're going to want files to contain the smallest practical
> functional blocks. I feel pretty confident saying that "put more stuff in
> one file" is the wrong answer, even if it is the Pythonic answer.

Why?  RCS systems can merge changes.  A RCS system is not a substitute for
design or programmers communication.  You'll only have a problem if two people
change the same line of code and if they are doing that (and worse: doing that
often) then you have a bigger problem than just the contents of the file. 

Unit tests help being sure that one change doesn't break the project as a
whole and for a big project you're surely going to have a lot of those tests.

If one change breaks another, then there is a disagreement on the application
design and more communication is needed between developers or a better
documentation of the API they're implementing / using. 

> 2) Importing and reloading. I want to be able to reload changes without
> exiting the interpreter. This pretty much excludes "from foo import *",
> unless you resort to this sort of hack:
>
> http://www.python.org/search/hypermail/python-1993/0448.html
>
> Has anyone found a systematic way to solve the problem of reloading in an
> interactive interpreter when using "from foo import *"?

I don't reload...  When my investigative tests gets bigger I write a script
and run it with the interpreter.  It is easy since my text editor can call
Python on a buffer (I use Emacs). 

> I appreciate any advice I can get from the community.

This is just how I deal with it...  My bigger "project" has several modules
now each with its own namespace and package.  The API is very documented and
took the most work to get done.

Using setuptools, entrypoints, etc. helps a lot as well. 


The thing is that for big projects your design is the most important part.
Get it right and you won't have problems with namespaces and filenames.  If
you don't dedicate enough time on this task you'll find yourself in trouble
really soon. 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From kyosohma at gmail.com  Mon Mar 19 16:01:57 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 13:01:57 -0700
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>
	<56863eF27p5bmU1@mid.uni-berlin.de>
	<WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
Message-ID: <1174334517.125928.274140@l75g2000hse.googlegroups.com>

On Mar 19, 2:45 pm, John Nagle <n... at animats.com> wrote:
> Diez B. Roggisch wrote:
> > John Nagle schrieb:
>
> >>   I'm looking for something that can read .MDB files, the format
> >> Microsoft Access uses, from Python.  I need to do this on
> >> Linux, without using Microsoft tools.  I just need to read
> >> the files once, so I can load the tables into another database.
> >> Speed isn't an issue, and I don't need to access the file in
> >> database fashion.  The files are too big to read into RAM all at once,
> >> though.
>
> >>   I tried "MDBtools", but the only (last) release was
> >> a pre-release three years ago, and I've encountered
> >> many build problems trying to make it work on Fedora
> >> Core 6.
>
> > I was just gonna suggest it. Under ubuntu, it works easy as cake, and
> > converts the mdb nicely to some CSV-files.
>
> > I think you should really try and make it work.
>
> > Diez
>
>     What MDBtools did you install?  The RPM, a checkout from CVS,
> or the downloadable distribution?  They're all different.
>
>                                 John Nagle

I've read .MDB files using ODBC. I don't know how big your files are,
but I had a file with almost 3000 rows and I was able to fetch it in
1-2 seconds. If you want to give it whirl, you just need to create an
ODBC connection and then do the following:

myconn = odbc.odbc('mydb_connection_name')
mycursor = myconn.cursor()
mycursor.execute('SELECT * FROM db_name')
mydata = mycursor.fetchall()
mycursor.close()
myconn.close()

for each in mydata:
   # do something like pull the info from the variable "mydata" and
send it into the other database


It is fast. But you may like what the others have said more.

Mike



From attn.steven.kuo at gmail.com  Mon Mar 12 20:04:08 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 12 Mar 2007 17:04:08 -0700
Subject: Request for a change in the csv module.
In-Reply-To: <1173741982.944813@jubilee.claranet.pt>
References: <1173741982.944813@jubilee.claranet.pt>
Message-ID: <1173744248.195944.245550@t69g2000cwt.googlegroups.com>

On Mar 12, 4:26 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Hi.
>
> I have just seen that csv module, more exactly the Dialect class,
> does not have any variable to specify the "floating point" character!
> In portuguese this is ','. Not '.'. 3.1415 -> 3,1415.
> I think this is also the case of other languages/countries.
> If I am correct, i.e. if there is no such possibility, where can
> I file a request for a csv change? Excel, for example, automatically
> converts '.' to ',' and the separator from ',' to ';'.
>



Try using locale.format when writing:

import csv
import locale

locale.setlocale(locale.LC_NUMERIC, 'pt_BR.ISO8859-1')
csv_writer = csv.writer(open("foo.csv","w"), dialect='excel')
rows = (('testing', 1.23), ('testing', 2.34))
formatted_rows = ((string, locale.format('%g', number)) for
(string,number) in rows)
csv_writer.writerows(formatted_rows)


locale.atof and locale.atoi can convert a string back
to a number.

--
Hope this helps,
Steven




From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 12:59:38 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 03:59:38 +1100
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
Message-ID: <pan.2007.03.21.16.59.37.377396@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 15:32:17 +0000, Tom Wright wrote:

>> Memory contention would be a problem if your Python process wanted to keep
>> that memory active at the same time as you were running GIMP.
> 
> True, but why does Python hang on to the memory at all?  As I understand it,
> it's keeping a big lump of memory on the int free list in order to make
> future allocations of large numbers of integers faster.  If that memory is
> about to be paged out, then surely future allocations of integers will be
> *slower*, as the system will have to:
> 
> 1) page out something to make room for the new integers
> 2) page in the relevant chunk of the int free list
> 3) zero all of this memory and do any other formatting required by Python
> 
> If Python freed (most of) the memory when it had finished with it, then all
> the system would have to do is:
> 
> 1) page out something to make room for the new integers
> 2) zero all of this memory and do any other formatting required by Python
> 
> Surely Python should free the memory if it's not been used for a certain
> amount of time (say a few seconds), as allocation times are not going to be
> the limiting factor if it's gone unused for that long.  Alternatively, it
> could mark the memory as some sort of cache, so that if it needed to be
> paged out, it would instead be de-allocated (thus saving the time taken to
> page it back in again when it's next needed)

And increasing the time it takes to re-create the objects in the cache
subsequently.

Maybe this extra effort is worthwhile when the free int list holds 10**7
ints, but is it worthwhile when it holds 10**6 ints? How about 10**5 ints?
10**3 ints?

How many free ints is "typical" or even "common" in practice?

The lesson I get from this is, instead of creating such an enormous list
of integers in the first place with range(), use xrange() instead.

Fresh running instance of Python 2.5:

$ ps up 9579
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
steve     9579  0.0  0.2   6500  2752 pts/7    S+   03:42   0:00 python2.5


Run from within Python:

>>> n = 0
>>> for i in xrange(int(1e7)):
...     # create lots of ints, one at a time
...     # instead of all at once
...     n += i # make sure the int is used
...
>>> n
49999995000000L


And the output of ps again:

$ ps up 9579
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
steve     9579  4.2  0.2   6500  2852 pts/7    S+   03:42   0:11 python2.5

Barely moved a smidgen.

For comparison, here's what ps reports after I create a single list with
range(int(1e7)), and again after I delete the list:

$ ps up 9579 # after creating list with range(int(1e7))
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
steve     9579  1.9 15.4 163708 160056 pts/7   S+   03:42   0:11 python2.5

$ ps up 9579 # after deleting list
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
steve     9579  1.7 11.6 124632 120992 pts/7   S+   03:42   0:12 python2.5


So there is another clear advantage to using xrange instead of range,
unless you specifically need all ten million ints all at once.



-- 
Steven.



From gregor at hostgis.com  Wed Mar  7 11:35:08 2007
From: gregor at hostgis.com (Gregor Mosheh)
Date: Wed, 7 Mar 2007 09:35:08 -0700 (MST)
Subject: How to build a Windows service using win32?
In-Reply-To: <1173272513.976647.99630@n33g2000cwc.googlegroups.com>
References: <mailman.4748.1173263972.32031.python-list@python.org>
	<1173272513.976647.99630@n33g2000cwc.googlegroups.com>
Message-ID: <3791.168.103.93.50.1173285308.squirrel@maps.hostgis.com>


Giles Brown wrote:
> Yeah.  You've cleverly decided to simplify the "smallest possible
> python service" by removing the
> if __name__ == '__main__':

Ha ha. :)
Seriously, though, I removed that long after it was failing to work, and
have since replaced it and it didn't affect a thing.


Gabriel Genellina wrote:
> Have you installed the pywin32 package from
> https://sourceforge.net/projects/pywin32/ ?
> The code skeleton looks OK to me.

Indeed, I have win32 installed. I'm used to writing wx applications,
compiling into exes, etc. Services are a new direction for me.


So, both of you say that the program I sent *did* work?
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From kyosohma at gmail.com  Fri Mar 23 14:04:40 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 11:04:40 -0700
Subject: exit to interpreter?
In-Reply-To: <mailman.5522.1174672336.32031.python-list@python.org>
References: <mailman.5522.1174672336.32031.python-list@python.org>
Message-ID: <1174673079.976162.307960@n76g2000hsh.googlegroups.com>

On Mar 23, 12:52 pm, belinda thom <b... at cs.hmc.edu> wrote:
> Hi,
>
> I'm writing a function that polls the user for keyboard input,
> looping until it has determined that the user has entered a valid
> string of characters, in which case it returns that string so it can
> be processed up the call stack. My problem is this. I'd also like it
> to handle a special string (e.g. 'quit'), in which case control
> should return to the Python command line as opposed to returning the
> string up the call stack.
>
> sys.exit seemed like a good choice, but it exits the python interpreter.
>
> I could use an exception for this purpose, but was wondering if
> there's a better way?
>
> --b

If you're using a function, wouldn't using the keyword "return" work?

Mike



From _karlo_ at _mosor.net_  Wed Mar 21 14:54:39 2007
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Wed, 21 Mar 2007 18:54:39 +0000 (UTC)
Subject: How to copy a ClassObject?
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
	<Xns98F993D63F87Dmosornet@161.53.160.64>
	<Xns98F995B5964F6duncanbooth@127.0.0.1>
Message-ID: <Xns98FACA8AE3544mosornet@161.53.160.64>

Duncan Booth <duncan.booth at invalid.invalid> wrote in
news:Xns98F995B5964F6duncanbooth at 127.0.0.1: 

> Consider yourself corrected.
> 
> You could do what you are attempting with:
> 
>    tmp = new.classobj('tmp', First.__bases__, dict(First.__dict__))
> 
> which creates a new class named 'tmp' with the same base classes and
> a copy of First's __dict__ except that the __name__ attribute for the
> new class will be set to 'tmp'. The attribute values are still shared
> between the classes (which is significant only if they are mutable),
> but otherwise they won't be sharing state.
> I have no idea why you would want to do this, nor even why you would
> want a   'name' attribute when Python already gives you '__name__'.

First of all, thanks for a clarification. 'name' attribute was just a 
(dumb) example, it was the first thing to come to mind.

The idea behind all of this was to create classes dynamicaly, without 
knowing in advance their names, or base class(es). So I figured I'd just 
copy the base class and modify the attributes. 
Instead, this way of subclassing seems to work just right for my purposes.

-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar  3 18:46:22 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 04 Mar 2007 00:46:22 +0100
Subject: Problem with returning prime number in a simple calculation
	program
References: <1172964996.193310.251650@j27g2000cwj.googlegroups.com>
Message-ID: <54ufmeF22b8naU1@mid.individual.net>

QHorizon at gmail.com wrote:
> [reformatted indentation]
> def prime():
>     num = input("Number ")
>     i = num - 1
>     divcounter = 0
>     while i > 1:
>         if num % i != 0
>             divcounter += 1 
>             i -= 1
>     if divcounter == num - 2:
>         print num, "is a prime number"
>     else:
>         print num, "is not a prime number"
> [...]
> As it says in the title, I'm having trouble with the prime number
> function.  It will print the sentence if the number is prime, but
> it if isn't, the program goes into a state in the terminal where
> the program never ends and you can just keep on typing.  

Sure thing. You designed the function to behave this way.

Look at the while loop -- especially think what happens if 
(num % i == 0). i will never be decremented then and the function
will not terminate.

Try inserting print statements for debugging if you don't get what I
meant here.

> Maybe the else statement is ineffective?

No one can read your thoughts. In which way effective?

Regards,


Bj?rn

-- 
BOFH excuse #86:

Runt packets



From mmara at fibertel.com.ar  Wed Mar 28 16:44:46 2007
From: mmara at fibertel.com.ar (mmara at fibertel.com.ar)
Date: Wed, 28 Mar 2007 17:44:46 -0300
Subject: Creating a new data structure while filtering its data origin.
Message-ID: <a6f5531646c8.460aa98e@fibertel.com.ar>

Hi everyone.

I'm trying to work with very simple data structures but I'm stuck in the very first steps. If someone has the luxury of a few minutes and can give an advice how to resolve this, I'll really appreciate it.

1- I have a list of tuples like this:
lista= [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2), (168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203, 141, 1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568, 142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]
and I want to end with a dict like this:
{141: {1: [203, 213, 201], 2: [168, ], 3: [162, ]}, 142: {1: [503, 513, 501], 2: [568, ], 4: [562, ]}}
 the logic of the final output:
 a) the outer dict's key is a set() of the 2rd value of the input.
 b) the inner dict's key is a set() of the 3th value for tuples which 3rd value equals a). 
 c) the inner list will be fill up with the 1st value of every tuple which 3rd value equals b) and its 2rd value equals a).

So far, the only thing it seems I can achieve is the first part:
outer_dict = dict([(x,dict()) for x in set(row[1] for row in lista)])

>From then on, I'm starting to get tired after several successful failures (I tried with itertools, with straight loops ...) and I don't know which can be the easier way to get that final output.

Thanks in advance.




From pecora at anvil.nrl.navy.mil  Sat Mar 10 12:22:50 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 10 Mar 2007 12:22:50 -0500
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<mailman.4878.1173485909.32031.python-list@python.org>
Message-ID: <pecora-C6EE6E.12225010032007@ra.nrl.navy.mil>

In article <mailman.4878.1173485909.32031.python-list at python.org>,
 Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> Lou Pecora <pecora at anvil.nrl.navy.mil> writes:
> 
> > ['import mymodule' in three separate modules]
> >
> > Then mymodule is imported only once, but each module has access to
> > it through the module name (mod1 and mod2) and the alias MM (mod3).
> > Is that right?
> 
> Not quite. The module is imported three times, and is assigned to
> three different namespaces; but the code in the module is executed
> only once, the first time it is imported. Each subsequent import skips
> the "execute the code" step.

Thanks.  That's clear.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From MonkeeSage at gmail.com  Fri Mar  2 23:23:54 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 20:23:54 -0800
Subject: class attrdict
In-Reply-To: <1hud4hf.r52pr7wyx0adN%aleax@mac.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
Message-ID: <1172895832.352834.313300@p10g2000cwp.googlegroups.com>

On Mar 2, 9:25 pm, a... at mac.com (Alex Martelli) wrote:
> The problem is mostly that, given an instance a of attrdict, whether you
> can call (e.g.) a.update(foo) depends on whether you ever set
> a['update'], making the whole program extremely fragile -- a very high
> price to pay for some modest amount of syntax sugar.

How about something like...

class attrdict(dict):
    def __init__(self, *args, **kwargs):
        dict.__init__(self, *args, **kwargs)
        for k, v in self.items():
            dict.__setattr__(self, str(k), v)
    def __setitem__(self, k, v):
        dict.__setitem__(self, k, v)
        dict.__setattr__(self, str(k), v)
    __setattr__ = __setitem__

Regards,
Jordan



From MonkeeSage at gmail.com  Fri Mar  2 21:06:03 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 18:06:03 -0800
Subject: Sort with extra variables
In-Reply-To: <pan.2007.03.03.01.34.16@gmail.com>
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de>
	<pan.2007.03.02.23.12.08@gmail.com>
	<1172877633.676612.141450@31g2000cwt.googlegroups.com>
	<pan.2007.03.02.23.51.54@gmail.com>
	<1172881667.825628.93490@t69g2000cwt.googlegroups.com>
	<pan.2007.03.03.01.34.16@gmail.com>
Message-ID: <1172887563.909151.191340@8g2000cwh.googlegroups.com>

On Mar 2, 7:34 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> Well, you'd have to define the function inside the sortMoves function, as
> it is where the variables exists.

Oh, sorry, I wasn't thinking there!

Regards,
Jordan



From kyosohma at gmail.com  Thu Mar 29 16:19:06 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 13:19:06 -0700
Subject: How can I get the content of a web site using http library
In-Reply-To: <MPG.20762cd6f9219cf99896a0@news.individual.de>
References: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
	<MPG.20762cd6f9219cf99896a0@news.individual.de>
Message-ID: <1175199546.203818.193270@b75g2000hsg.googlegroups.com>

On Mar 29, 3:07 pm, Thorsten Kampe <thors... at thorstenkampe.de> wrote:
> * silverburgh.me... at gmail.com (29 Mar 2007 12:18:19 -0700)
>
> > I am trying to get the content of a web site like this:
> > But my question is how can I do a 'GET' request without putting the '/
> > index.html''
>
> import urllib
> print urllib.urlopen('http://www.yahoo.com/').read()

Posting to a form:

urllib:
http://www.thescripts.com/forum/thread23871.html

httplib:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146306
http://www.python.org/infogami-faq/library/how-can-i-mimic-cgi-form-submission-method-post/

Mike



From daniel.lipovetsky at gmail.com  Sun Mar 11 20:36:22 2007
From: daniel.lipovetsky at gmail.com (Daniel Lipovetsky)
Date: Sun, 11 Mar 2007 17:36:22 -0700
Subject: Object instance "reporting" to a container class instance
Message-ID: <d13a83780703111736p3c4cbbf2o9f689919629a80d3@mail.gmail.com>

I would like for an object to "report" to a container object when a
new instance is created or deleted. I could have a container object
that is called when a new instance is created, as below.

class AnyObject:
    pass

class Container:
    links = []
    def add(self,other):
        while other not in self.links:
            self.links.append(other)
    def rem(self,other):
        while other in self.links:
            self.links.remove(other)
...

container = Container()
a = AnyObject()
container.add(a)

My question is: can (should? :-) this "reporting" be done inside the
instance's __init__ and __del__ methods (that is, an instance
"reports" to the container as soon as it is created or deleted)?

Thanks!
Daniel

---

I'm working out a design where Object A is "linked" to Object B, and
both objects become aware of that relationship. I have implemented an
example successfully; the code is below. My main question is above,
but I would appreciate comments on the code! (For example, I'm
wondering whether my way of defining variables in the class but
assigning them locally to each instance (in the "Object.init" method)
is really a bad kludge...)


class Object():
    def __del__(self):
        print "buh-bye!", self # Verbose for understanding garbage cleanup
    def init(self,name):
        self.links = []
        self.name = name
    def add(self,other):
        while other not in self.links:
            self.links.append(other)
            other.add(self)
    def rem(self,other):
        while other in self.links:
            self.links.remove(other)
            other.rem(self)

class Student(Object):
    def __init__(self,name):
        self.init(name)

class Section(Object):
    def __init__(self,name):
        self.init(name)

class Task(Object):
    def __init__(self,name):
        self.init(name)

## Construct test instances!

students = {}
for name in ['Jose','Daniel','Rusty']:
    student = Student(name)
    students[name] = student

sections = {}
for name in ['English 1']:
    section = Section(name)
    sections[name] = section

tasks = {}
for name in ['Homework 1','Exam 1','Homework 2','Exam 2']:
    task = Task(name)
    tasks[name] = task

# Display example connections
def show_connections():
    for section in sections:
        print sections[section].name
        for link in sections[section].links:
            print "\t", link.name

# Add some connections...

print "Now adding connections..."
for name in tasks:
    sections['English 1'].add(tasks[name])
    show_connections()

# Remove some connections...

print "Now removing connections..."
for name in tasks:
    sections['English 1'].rem(tasks[name])
    show_connections()

for task in tasks:
	print tasks[task].links

for section in sections:
	print sections[section].links

## Test garbage cleanup

sections['English 1'].add(tasks['Exam 1'])
print sections['English 1'].links
sections['English 1'].rem(tasks['Exam 1'])
del sections['English 1']


From mail at microcorp.co.za  Sun Mar 11 06:48:22 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sun, 11 Mar 2007 12:48:22 +0200
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
Message-ID: <01ae01c763cc$02b764c0$03000080@hendrik>

 "David Cramer" <dc...er at gmail.com> wrote:

> If you had an application that you were about to begin development on
> which you wanted to be cross platform (at least Mac and Windows),
> would you suggest using c++ and Python?
> 
> I'm asking because we were originally thinking about doing c# but
> after attending PyCon this year I'm reconsidering. We are already
> using Python for the website and I figure a c++ backend w/ a Python
> GUI may work really well, and would be pretty easy to port.
> 
> Any opinions?
 
Why drag in the C++ ? 
What do you intend to do in it that you can't do in python?
Seems unnecessarily complex to me.
And on a desktop, speed issues are kind of irrelevant - Python
is snappy enough on modern hardware for most things.

My style would be to have the gui connect via pipes to the
local backend as a separate process, with a third process if there
are any communications needed to off box dbs.   But that is just
the way I think - YMMV

- Hendrik



From psdasilvaX at esotericaX.ptX  Thu Mar  8 13:52:34 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Thu, 08 Mar 2007 18:52:34 +0000
Subject: Where to "import"?
Message-ID: <1173379952.901004@iceman.esoterica.pt>

Hi!

If I have two files .py such as

m.py
	from c import *
	...
	x=c()
	...
	os.any_method ...
	...

c.py
	class c:
		def __init__(self, ...):
			...
			os.any_method ...
			...
	...

both using os module where should I put the "import os"? In both files?

Thanks
Paulo


From sgeiger at ncee.net  Wed Mar 21 14:45:21 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Wed, 21 Mar 2007 13:45:21 -0500
Subject: flattening/rolling up/aggregating a large sorted text file
In-Reply-To: <1174479568.427193.132740@n59g2000hsh.googlegroups.com>
References: <1174479568.427193.132740@n59g2000hsh.googlegroups.com>
Message-ID: <46017D41.4030400@ncee.net>

Apparently you want to use this data to know how many blue circles, blue 
squares, red circles and red squares.  In other words, I doubt you want 
to output redundant data columns, you just want this data in a more 
usable format and that you don't actually need to do multiple passes 
over it.

This is a fun problem to solve because it uses two very powerful tools: 
cvs.dictreader and bitwise categorization.

Note: your initial data has three records with the same ID.  I assumes 
the ID is the unique key.  So I changed the data slightly.





adtvff at yahoo.com wrote:
> Hi,
>
> Given a large ascii file (delimited or fixed width) with one ID field
> and dimensions/measures fields, sorted by dimensions, I'd like to
> "flatten" or "rollup" the file by creating new columns: one for each
> combination of dimension level, and summing up measures over all
> records for a given ID.
>
> If the wheel has already been invented, great, please point me in the
> right direction. If not, please share some pointers on how to think
> about this problem in order to write efficient code.
>
> Is a hash with dimension level combinations a good approach, with
> values reset at each new ID level?
>
> I know mysql, Oracle etc will do this , but they all have a cap on #
> of columns allowed. SAS will allow unlimited columns, but I don't own
> SAS.
>
> Thanks.
>
>
> ID,color,shape,msr1
> ------------------------------
> 001, blue, square,  4
> 001, red , circle,    5
> 001, red,  circle,    6
>
>
> ID, blue_circle, blue_square, red_circle, red_square
> --------------------------------------------------------------------------
> 001,0,4,11,0
> 002 ...
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From bruno.desthuilliers at gmail.com  Thu Mar  1 03:20:05 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 1 Mar 2007 00:20:05 -0800
Subject: Curious UnboundLocalError Behavior
In-Reply-To: <mailman.4517.1172682923.32031.python-list@python.org>
References: <mailman.4517.1172682923.32031.python-list@python.org>
Message-ID: <1172737205.386931.85040@z35g2000cwz.googlegroups.com>

On 28 f?v, 18:15, "Matthew Franz" <mdfr... at gmail.com> wrote:
> I'm probably fundamentally misunderstanding the way the interpreter
> works with regard to scope, but is this the intended behavior...
>
(snip traceback)

> import os,sys
>
> SOMEGLOBAL=1
>
> def foo():
>     dome=False
>     if dome:
>         SOMEGLOBAL = 0


This makes SOMEGLOBAL local !-)

Look for the 'global' statement. Or better, try to avoid rebinding
globals from within a function.

As as side note: by convention, ALL_UPPER names denote constants.



From http  Fri Mar  2 14:44:27 2007
From: http (Paul Rubin)
Date: 02 Mar 2007 11:44:27 -0800
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
Message-ID: <7xlkifh1lw.fsf@ruckus.brouhaha.com>

Thomas Dybdahl Ahle <lobais at gmail.com> writes:
> Do you have any ideas how I can sort these moves the fastest?

One idea: if you're using alpha-beta pruning, maybe you can use
something like heapq instead of sorting, since a lot of the time you
only have to look at the first few moves (ordered best-first).


From steve at holdenweb.com  Thu Mar 15 15:48:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 15 Mar 2007 15:48:25 -0400
Subject: os.path.isfile with *.tar.gz
In-Reply-To: <09042D621CD4AA479C678463F3A646D0E87D10@sottemail1.ent.ad.cognos.com>
References: <09042D621CD4AA479C678463F3A646D0E87D10@sottemail1.ent.ad.cognos.com>
Message-ID: <etc80v$ibc$1@sea.gmane.org>

Boudreau, Emile wrote:
> Hello All,
>         I'm new to Python and it looks like people that post here do get 
> a good answer back so I figured I'd try my luck.
> 
> I'm trying to check a directory to see if there is a file that has the 
> name "startOfString" + some version number + "inst.tar.gz" 
> (component-8.3.16-inst.tar.gz) The version number will change quite 
> frequently so I just want to check if there is a file with that format name.
> 
> I have tried variations of: os.path.isfile( os.path.join("C:\\temp\\", 
> "rqp-win32-app", "*.tar.gz"))
> but nothing seem to work. Does anyone have suggestions on how I could 
> get this to work?
> 
> Thanks in advance for the help,
> Emile
> 
>  
>      This message may contain privileged and/or confidential 
> information.  If you have received this e-mail in error or are not the 
> intended recipient, you may not use, copy, disseminate or distribute it; 
> do not open any attachments, delete it immediately from your system and 
> notify the sender promptly by e-mail that you have done so.  Thank you.
> 
Take a look at the glob module documentation. Glob.glob will almost 
certainly do what you want, as it's specifically written to match 
wildcard filenames.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From sjmachin at lexicon.net  Sat Mar 10 10:48:39 2007
From: sjmachin at lexicon.net (John Machin)
Date: 10 Mar 2007 07:48:39 -0800
Subject: UTF-8
In-Reply-To: <mailman.4899.1173535209.32031.python-list@python.org>
References: <mailman.4899.1173535209.32031.python-list@python.org>
Message-ID: <1173541719.669447.71330@30g2000cwc.googlegroups.com>

On Mar 11, 1:00 am, Olivier Verdier <cht... at gmail.com> wrote:
> First off: i thoroughly enjoy python. I use it for scientific
> computing with scipy, numpy and matplotlib and it's an amazingly
> efficient and elegant language.
>
> About this mailing list: it is very hard to search. I can't find any
> search field on the page:http://mail.python.org/mailman/listinfo/
> python-list. I would greatly appreciate if you moved that list over
> to google, for instance, so that it be both searchable and rss-feedable.
>

The mailing list and the Usenet newsgroup comp.lang.python mirror each
other. Google Groups provides access to Usenet newsgroups; try
http://groups.google.com/group/comp.lang.python

Other possibilities are gmane.org and Yahoo Groups; see
http://www.python.org/community/lists/

HTH,
John






From codecraig at gmail.com  Tue Mar 20 09:46:27 2007
From: codecraig at gmail.com (abcd)
Date: 20 Mar 2007 06:46:27 -0700
Subject: help - Module needs access to another module
Message-ID: <1174398386.976864.109350@p15g2000hsd.googlegroups.com>

I have the following directory/file structure...

c:\foo\utils.py
c:\foo\bar\ok.py

In ok.py I want to do something like...

import utils
utils.helpMeDoSomething(....)

However, it seems that ok.py doesn't "know" about utils.  Other than
manually configuring sys.path what can I do?

thanks



From vatamane at gmail.com  Tue Mar 27 23:11:15 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 27 Mar 2007 20:11:15 -0700
Subject: urllib timeout issues
In-Reply-To: <1175028104.429759.165920@n76g2000hsh.googlegroups.com>
References: <1175023315.536080.276550@n76g2000hsh.googlegroups.com>
	<mailman.5681.1175026431.32031.python-list@python.org>
	<1175028104.429759.165920@n76g2000hsh.googlegroups.com>
Message-ID: <1175051475.534486.195200@e65g2000hsc.googlegroups.com>

On Mar 27, 4:41 pm, "supercooper" <supercoo... at gmail.com> wrote:
> On Mar 27, 3:13 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Tue, 27 Mar 2007 16:21:55 -0300, supercooper <supercoo... at gmail.com>
> > escribi?:
>
> > > I am downloading images using the script below. Sometimes it will go
> > > for 10 mins, sometimes 2 hours before timing out with the following
> > > error:
>
> > >     urllib.urlretrieve(fullurl, localfile)
> > > IOError: [Errno socket error] (10060, 'Operation timed out')
>
> > > I have searched this forum extensively and tried to avoid timing out,
> > > but to no avail. Anyone have any ideas as to why I keep getting a
> > > timeout? I thought setting the socket timeout did it, but it didnt.
>
> > You should do the opposite: timing out *early* -not waiting 2 hours- and
> > handling the error (maybe using a queue to hold pending requests)
>
> > --
> > Gabriel Genellina
>
> Gabriel, thanks for the input. So are you saying there is no way to
> realistically *prevent* the timeout from occurring in the first
> place?  And by timing out early, do you mean to set the timeout for x
> seconds and if and when the timeout occurs, handle the error and start
> the process again somehow on the pending requests?  Thanks.
>
> chad

Chad,

Just run the retrieval in a Thread. If the thread is not done after x
seconds, then handle it as a timeout and then retry, ignore, quit or
anything else you want.

Even better, what I did for my program is first gather all the URLs (I
assume you can do that), then group by servers, i.e. n # of images
from foo.com, m # from bar.org .... Then start a thread for each
server (with some possible maximum number of threads), each one of
those threads will be responsible for retrieving images from only one
server (this is to prevent a DoS pattern). Let each of the server
threads start a 'small' retriever thread for each image (this is to
handle the timeout you mention).

So you have two different threads -- one per server to parallelize
downloading, which in turn will spawn and one per download to handle
timeout. This way you will (ideally) saturate your bandwidth but you
only get one image per server at a time so you still 'play nice' with
each of the servers.  If you want to have a max # of server threads
running (in case you have way to many servers to deal with) then run
batches of server threads.

Hope this helps,
Nick Vatamaniuc



From deets at nospam.web.de  Fri Mar  9 10:49:07 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 16:49:07 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
	<1173449933.926669.90810@n33g2000cwc.googlegroups.com>
	<55d9ehF24cdi0U1@mid.uni-berlin.de>
	<1173452206.029944.255750@j27g2000cwj.googlegroups.com>
Message-ID: <55ddvkF251n88U1@mid.uni-berlin.de>

dbhbarton at googlemail.com wrote:

>> > I'm sorry I don't follow your logic. Meaningless to the interpreter,
>> > yes, meaningless to the IDE or to me, no. I "_can't_ profit from these
>> > conveniences"? Why ever not?
>>
>> Exactly, the ? is meaningless to the language itself, it's only a comment
>> sign - ...
>> ... it has nothing to do with _python_ the language, so it doesn't
>> belong there.
> 
> But # is 'only a comment sign' as well, and equally meaningless to the
> interpreter. But it's still part of the language, very very useful and
> I profit from its existence every day. 

A language has to have a comment mechanism, some even several.

But all of them are clear on how they work: they affect one line, or have a
bracket style like /* */ and thus demark clearly what they affect. Even
someone not fluent in the language in question will quickly grab what they
mean.

But the key-difference is that the comment in python has a meaning for the
interpreter - ignore this.

The ? has no meaning. It only has a meaning for an editor.

>> But for python itself, it has no meaning whatsoever, and would just be a
>> character to overread, introducing visual clutter.
> 
> If you can highlight an entire block with a single character, won't
> there be _less_ visual clutter than the current way of achieving the
> same effect with # comments?

Not in my opinion - 

# fixme
def foo():
   pass

is much more clear than a rather obscure and by the occasional beholder
maybe misinterpreted

?def foo():
   pass

> Would if I could!

Well, grab eric3, it's written in python, and teach it to do so! It's an
exercise in python then :)

It already has some features like bookmarks, shouldn't be too hard to build
upon that.

> What we're talking about here is a form of 'alternate commenting
> style'. With the IDE's cooperation it'd work on whole blocks at once,
> it would highlight without disrupting the code concerned (at least the
> way I'm envisaging it), it would be versatile (could probably be used
> for as big a variety of purposes as the # comment), and yes, it'd be
> persistent, which is how it would be different from any IDE-based
> highlighting.

I think you contradict yourself here. On the one side, you want it not
disturbing to the eye, yet it should be highlighted, so it will be directly
noticed by that same eyes.

This is why I believe that your idea by itself - the visually marking of
code parts - is a good thing, but the embedding into code is not, because
it _is_ an disturbance. And with an IDE that stores such information in
e.g. project metainformation, you can even have the persistence, without
the disturbance and without altering python.

Diez


From gtcopeland at gmail.com  Tue Mar 20 14:36:02 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 20 Mar 2007 11:36:02 -0700
Subject: freeze.py and dom.minidom
Message-ID: <1174415762.618919.273600@l75g2000hse.googlegroups.com>

I am attempting to freeze an application which uses the dom.minidom
parser.  When I execute my application, I get an import error of:
ImportError: No module named dom.minidom.  During the freeze process,
I can see:
freezing xml ...
freezing xml.dom ...
freezing xml.dom.NodeFilter ...
freezing xml.dom.domreg ...
freezing xml.dom.expatbuilder ...
freezing xml.dom.minicompat ...
freezing xml.dom.minidom ...
freezing xml.dom.pulldom ...
freezing xml.dom.xmlbuilder ...
freezing xml.parsers ...
freezing xml.parsers.expat ...
freezing xml.sax ...
freezing xml.sax._exceptions ...
freezing xml.sax.expatreader ...
freezing xml.sax.handler ...
freezing xml.sax.saxutils ...
freezing xml.sax.xmlreader ...

And in my target directory, I can see:
$ ls M_xml*
M_xml.c                     M_xml__dom.o
M_xml__sax___exceptions.o
M_xml__dom.c                M_xml__dom__pulldom.c
M_xml__sax__expatreader.c
M_xml__dom__domreg.c        M_xml__dom__pulldom.o
M_xml__sax__expatreader.o
M_xml__dom__domreg.o        M_xml__dom__xmlbuilder.c
M_xml__sax__handler.c
M_xml__dom__expatbuilder.c  M_xml__dom__xmlbuilder.o
M_xml__sax__handler.o
M_xml__dom__expatbuilder.o  M_xml.o                    M_xml__sax.o
M_xml__dom__minicompat.c    M_xml__parsers.c
M_xml__sax__saxutils.c
M_xml__dom__minicompat.o    M_xml__parsers__expat.c
M_xml__sax__saxutils.o
M_xml__dom__minidom.c       M_xml__parsers__expat.o
M_xml__sax__xmlreader.c
M_xml__dom__minidom.o       M_xml__parsers.o
M_xml__sax__xmlreader.o
M_xml__dom__NodeFilter.c    M_xml__sax.c
M_xml__dom__NodeFilter.o    M_xml__sax___exceptions.c

As you can see, minidom is being frozen and M_xml__dom__minidom.o is
compiled.  Likewise, I can confirm it linked into the application.
What do I need to do to get this to work with a frozen application?

Greg



From no at spam.it  Thu Mar  1 12:15:01 2007
From: no at spam.it (Pablo was Paolo)
Date: Thu, 01 Mar 2007 18:15:01 +0100
Subject: Reading csv files using SQL
In-Reply-To: <mailman.4568.1172751025.32031.python-list@python.org>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>	<45e6731d$0$4786$4fafbaef@reader4.news.tin.it>
	<mailman.4568.1172751025.32031.python-list@python.org>
Message-ID: <45e70a14$0$37202$4fafbaef@reader3.news.tin.it>

skip at pobox.com ha scritto:
> If you want to work directly with the files why not just use Python's csv
> module?

Now, with Java, I use the same class to read several databases and csv 
files (with SQL instructions).
I'd like to find a library for using the same approach in Python.

Thank you,
Paolo


From mail at microcorp.co.za  Tue Mar 20 01:49:54 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 20 Mar 2007 07:49:54 +0200
Subject: Timeout to readline()/readlines()
References: <1174312248.404607.212110@b75g2000hsg.googlegroups.com>
Message-ID: <000301c76ab8$336481a0$03000080@hendrik>

"Horta" <danilo.horta at gmail.com> wrote:

>  Sometimes, when I do an os.popen*(), the process executed by the
> command hangs, and the script stops forever on the readline()/
> readlines() calls. I found that I can use select, but I'm thinking...
> if, after a sellect() call returns, the stdout (for example) has more
> than one line? or if it has just some characters, no newline, and the
> process just hangs?
> 
>   I just want a readline(timeout) and readlines(timeout) like
> functions. Do I need to create my owns or there're already
> implemented?

you have to unblock the file and use try - except.
look at the fcntl module

- Hendrik



From deets at nospam.web.de  Mon Mar 19 06:49:51 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 Mar 2007 11:49:51 +0100
Subject: XML based programming language
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
Message-ID: <56786fF2743atU2@mid.uni-berlin.de>

stefaan wrote:

> Thank you Diez for answering.
> As far as I can see, it more or less corresponds to what I have.
> 
> But my question was perhaps more this:
> 
> "If elementtree is "lex", what is "yacc" ? "

Elementtree isn't lex. You are comparing apples and oranges here. Lex
tokenizes, yacc creates trees. Both of is covered in XML itself - it's
defined the tokenization and parsing, built into elementtree. So,
elemnttree is lex _and_ yacc for XML. And if your language is written in
XML, that's all there is to it.

Diez


From vatamane at gmail.com  Mon Mar 12 01:12:43 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 11 Mar 2007 22:12:43 -0700
Subject: Watching a file another app is writing
In-Reply-To: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
Message-ID: <1173676363.653940.133030@30g2000cwc.googlegroups.com>

On Mar 11, 3:36 pm, Gordon Airporte <JHoo... at fbi.gov> wrote:
> I'm trying to find a way to take a file that another program has opened
> and writes to periodically, open it simultaneously in Python, and
> automatically update some of my objects in Python when the file is
> written to.
> I can open the file and manually readlines() from it to keep up to date,
> it's the automatic part I'm having trouble with. This is on Windows.

You might need to look at pywin32 for Windows specific ways to listen
to "file changed" event.

On Unix a quick shortcut would be to simply read the output of 'tail -
f <file>' command...



From exarkun at divmod.com  Mon Mar  5 14:54:41 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 5 Mar 2007 14:54:41 -0500
Subject: Webserver balance load
In-Reply-To: <1173124034.130806.316750@30g2000cwc.googlegroups.com>
Message-ID: <20070305195441.17852.300056054.divmod.quotient.3539@ohm>

On 5 Mar 2007 11:47:15 -0800, Johny <python at hope.cz> wrote:
>Can anyone suggest a way how to balance load on Apache server where I
>have Python scripts running?
>For example I have 3 webservers( Apache servers) and I would like to
>sent user's request to one of the three server depending on a load on
>the server.
>Thank you .
>L.
>

http://pythondirector.sourceforge.net/ might be interesting.

>--
>http://mail.python.org/mailman/listinfo/python-list
>


From apoliveiraleite at gmail.com  Mon Mar 19 18:55:51 2007
From: apoliveiraleite at gmail.com (Ana Paula Leite)
Date: Mon, 19 Mar 2007 18:55:51 -0400
Subject: urgent - Matplolib with IDLE!
In-Reply-To: <a749952d0703191411u1ce36ca4lbb4ad50d705ab074@mail.gmail.com>
References: <26f4c9e60703191308j55287087ydc12c24656b4df6b@mail.gmail.com>
	<a749952d0703191411u1ce36ca4lbb4ad50d705ab074@mail.gmail.com>
Message-ID: <26f4c9e60703191555x2b848fa1rf6d2051522c822e2@mail.gmail.com>

Hi,

in site-packages/matplotlib/backends/backend_tkagg.py
I commented out in the show function the line

Tk.mainloop()

In addition to the changes I mentioned in my first email, this has solved my
problem!









On 3/19/07, Rob Clewley <rhc28 at cornell.edu> wrote:
>
> I have the same problem with a similar setup (except Python 2.4.3) and
> have tried the same solutions (BTW those steps really did used to work
> on my machine using Python 2.3.5). In the short term you could either
> try IPython (a proper solution to this problem, which returns me to
> the prompt just fine after closing the figure) or try the following
> "quick and dirty fix" with IDLE:
>
> 1) If your script does stuff other than define classes and functions,
> put in a command that prevents it getting to the calculations (e.g.
> insert a "1/0" line) or, for instance, turn all your calculations into
> function calls that you can easily comment out (temporarily). Run your
> script using F5 so that you just get the prompt.
> 3) Create an empty figure using pylab.figure() or whatever.
> 2) Close the figure and the IDLE console (command prompt window) that
> opened when you ran the script (you have to say Yes when it asks about
> killing a python process).
> 3) This leaves an orphaned python process which you have to clean up
> later using your Task Manager, but ...
> 4) you can now continue to interact with any new IDLE console created
> in the current session when you bring up new figures. i.e. uncomment
> the parts of your script that actually do stuff and run it again.
>
> At least that's a quick fix that's working for me while I await a
> better answer too... Perhaps this hack will outrage someone's
> sensibilities sufficiently that we'll hear of a better IDLE solution.
>
> HTH,
> Rob
>
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From bignose+hates-spam at benfinney.id.au  Sat Mar  3 02:39:32 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 Mar 2007 18:39:32 +1100
Subject: implementing SFTP using Python
References: <683868.19200.qm@web38806.mail.mud.yahoo.com>
Message-ID: <873b4m3he3.fsf@benfinney.id.au>

kadarla kiran kumar <kadarlakiran at yahoo.com> writes:

> I have to implement SFTP conection from client to the server using
> Python script.  Iam very new new to python , and i dont't have much
> time to complete this. So I need some pointers from you.

You will probably want to investigate the "paramiko" package, a
pure-Python implementation of the SSH2 protocol.

    <URL:http://www.lag.net/paramiko/>

On Debian ("etch" or newer), you can install the 'python-paramiko'
package. Alternatively, download it from the website.

-- 
 \           "I was in a bar the other night, hopping from barstool to |
  `\     barstool, trying to get lucky, but there wasn't any gum under |
_o__)                                    any of them."  -- Emo Philips |
Ben Finney



From facundo at taniquetil.com.ar  Tue Mar 20 16:00:29 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Tue, 20 Mar 2007 20:00:29 +0000 (UTC)
Subject: Patchs and bugs resume
Message-ID: <etpegs$gc2$1@sea.gmane.org>

People:

At the beginning of March, there was a thread in python-dev about patchs and bugs that teorically weren't checked out. The thread discussed how to involve more people in checking patchs and bugs, and to create other dinamic around them.

>From that discussion, I asked myself: "How can I know the temporal location of a patch/bug?". Are there a lot of old patchs/bugs? Those that are old, don't have any update or there're a big discussion with each one? Are they abandoned?

To help me with this analisys, I made a tool that taking information from SourceForge it creates a resume table, for the patchs...

  http://www.taniquetil.com.ar/facundo/py_patchs.html

...and the bugs:

  http://www.taniquetil.com.ar/facundo/py_bugs.html 

My idea is to update them periodically (something like each day, at the end of the html you have the update date and time).

Enjoy it.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From sjmachin at lexicon.net  Sat Mar 17 09:38:40 2007
From: sjmachin at lexicon.net (John Machin)
Date: 17 Mar 2007 06:38:40 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <mailman.5220.1174128479.32031.python-list@python.org>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
	<7xfy845q24.fsf@ruckus.brouhaha.com>
	<mailman.5220.1174128479.32031.python-list@python.org>
Message-ID: <1174138720.344398.214480@b75g2000hsg.googlegroups.com>

On Mar 17, 9:46 pm, Steve Holden <s... at holdenweb.com> wrote:
> Paul Rubin wrote:
> > Steven D'Aprano <s... at REMOVE.THIS.cybersource.com.au> writes:
> >> or even
>
> >> len(filter(lambda t, y=y: y>t, x))
>
> > How about
>
> >    min(i for i,t in enumerate(x) if t >= y)
>
> > or
>
> >    max(i for i,t in enumerate(x) if t <= y)
>
> > Those are actually pretty direct.
>
> How about a solution (like the bisect one suggested almost as soon as
> this thread started) that doesn't iterate over the whole list.
>
> Having said which, for the promoted use cases I agree that the append()
> and sort() paradigm wins hands down until it starts to make a real and
> observable difference to the run time.
>

Unfortunately for sort/append, the OP wants to find the insertion
point -- he hasn't mentioned actually doing the insertion.




From ntv1534 at gmail.com  Fri Mar  2 05:08:38 2007
From: ntv1534 at gmail.com (MooMaster)
Date: 2 Mar 2007 02:08:38 -0800
Subject: decimal and context objects!
Message-ID: <1172830118.276246.101820@30g2000cwc.googlegroups.com>

Hey guys, I'm trying to do some black magic voodoo and it's a little
late, so forgive me if this question seems obvious or has been asked
before. I tried doing a search on context objects and didn't find
anything that popped out, and I'm too tired to keep digging.

I'm making a little program that is trying to do weird and sexy things
by fully leveraging the power of all the built-in beauty of Python. I
was trying to play around with the new features added into Python 2.5,
and ran into an unexpected issue...check this out:

>>> moo = lambda x, y : decimal.Context(3).sqrt(decimal.Context(3).power(x,2) + decimal.Context(3).power(y,2))
>>> moo
<function <lambda> at 0x02CD0EB0>
>>> row = [1,2,3,4,5]
>>> weight_vector = .00556
>>> moo(sum(row), weight_vector)
Traceback (most recent call last):
  File "<pyshell#5>", line 1, in <module>
    moo(sum(row), weight_vector)
  File "<pyshell#1>", line 1, in <lambda>
    moo = lambda x, y :
decimal.Context(3).sqrt(decimal.Context(3).power(x,2) +
decimal.Context(3).power(y,2))
  File "C:\Python25\lib\decimal.py", line 2662, in power
    return a.__pow__(b, modulo, context=self)
TypeError: wrapper __pow__ doesn't take keyword arguments

I have no idea what keyword argument is getting passed to __pow__,
anyone know what's going on?

This should compute sqrt(5^2 + 3^2)



From michael at jedimindworks.com  Sun Mar 25 01:55:30 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 25 Mar 2007 00:55:30 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174794013.752495.42220@o5g2000hsb.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5571.1174789089.32031.python-list@python.org>
	<1174794013.752495.42220@o5g2000hsb.googlegroups.com>
Message-ID: <9F9FBF4C-B418-4788-B041-69B8C5337AC5@jedimindworks.com>

>
> /Libary/Frameworks/ is an empty directory(except for . and ..) on my
> Mac, and I have 2.3.5 installed somewhere.

Ye sorry 'bout that...  Apple's default install is under /System/ 
Library...  Framework builds from python.org get installed under / 
Library




From kw at codebykevin.com  Mon Mar 26 22:32:11 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Mon, 26 Mar 2007 22:32:11 -0400
Subject: Associate image name with list item
Message-ID: <b8eda$4608822b$4275d90a$15798@FUSE.NET>

I'm trying to avoid a *lot* of typing in my Tkinter application by 
associating image names with items in a list. Here is my sample list:

self.catlist = [
             'all', 'installed', 'base', 'crypto', 'database', 'devel',
         'editors', 'games', 'gnome', 'graphics', 'kde', 'languages', 
'libs', 'libs_perlmods',
         'libs_pythonmods', 'libs_rubymods', 'net', 'sci', 'shells', 
'sound', 'text', 'web',
         'x11_system', 'x11-wm', 'x11'
             ]

I've also already created a bunch of images with names that correspond 
to the list above, i.e. self.all, self.installed, and so on.  Here's the 
rest of my code:

for item in self.catlist:
             print item
             self.categorytable.insert(END, item)
	    self.categorytable.cellconfigure("end,0", image=self.item)

This yields the following error:

AttributeError: item

because, of course, I don't actually have an image called self.item.

What I'm trying to do is get the value of the variable "item" and plug 
it into the image name, so that self.item actually corresponds to 
self.installed, self.base, etc. Trying something like

self.categorytable.cellconfigure("end,0", image=self.%s % item)

just yields a syntax error: SyntaxError: invalid syntax

Can anyone point me in the right direction?
-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From george.sakkis at gmail.com  Thu Mar  1 00:44:31 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 28 Feb 2007 21:44:31 -0800
Subject: Tuples vs Lists: Semantic difference (was: Extract String From
	Enclosing Tuple)
In-Reply-To: <mailman.4550.1172720725.32031.python-list@python.org>
References: <slrneubq5t.1j3.rshepard@salmo.appl-ecosys.com>
	<87slcqvskr.fsf@benfinney.id.au>
	<mailman.4538.1172705434.32031.python-list@python.org>
	<54ms6fF21c6h3U2@mid.individual.net>
	<mailman.4550.1172720725.32031.python-list@python.org>
Message-ID: <1172727871.032664.165240@j27g2000cwj.googlegroups.com>

On Feb 28, 10:45 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:

> Bjoern Schliessmann <usenet-mail-0306.20.chr0n... at spamgourmet.com> writes:

> > I know tuples as immutable lists ...
>
> That's a common misconception.

And this catch phrase, "that's a common misconception", is a common
aping of the BDFL's take on this. As several long threads have shown,
it is a highly controversial topic and claiming that one side has
misconceived it doesn't make it more true than a Catholic claiming
that Protestants are misconceived about the True Christianity or vice
versa.

> Tuples are intended for use as heterogeneous data structures: every
> index in the sequence *means* something, a semantic meaning applied to
> the item at that index. It's for this reason that a tuple is
> immutable: removing items, inserting them in the middle, etc. would
> imply that the index doesn't have semantic meaning for the structure,
> which is not true.
>
> Lists are intended for use as homogeneous sequences: not that every
> value is of the same type, but that a particular index in the sequence
> doesn't *mean* anything about the semantic interpretation of the item
> at that position. It's for this reason that a list is mutable: since
> the index of an item has no semantic meaning, inserting new items or
> removing them from anywhere in the sequence doesn't alter the meaning
> of the structure.
>
> James Tauber explains further:
>
>     <URL:http://jtauber.com/blog/2006/04/15/python_tuples_are_not_just_constan...>

Nice, that's a good summary of the straw man arguments about the
"true" distinction between tuples and lists. Now can you please
explain why an "heterogeneous data structure":
1) does not support __setitem__, changing the value of an existing
item from 3 to 4,
2) supports iteration over its ("heterogeneneous") elements, but not
an index() method, and
3) why using indices rather than names for implied semantics is a good
idea anyway.

As for addition/removal/insertion of elements not making sense for a
heterogeneous data structure, have you heard of database schema
change ?

Heterogeneous data structures are well known for several decades now;
they are commonly spelled "records" though, not tuples, and have a
more reasonable API to support their semantics.

George



From aleax at mac.com  Sat Mar 24 12:36:56 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 24 Mar 2007 09:36:56 -0700
Subject: PyImport_ImportModule/embedding: surprising behaviors
References: <mailman.5359.1174435375.32031.python-list@python.org>
	<eu3h1h$li2$1@panix3.panix.com>
Message-ID: <1hvh39c.1hxaek1vuz71N%aleax@mac.com>

Aahz <aahz at pythoncraft.com> wrote:

> In article <mailman.5359.1174435375.32031.python-list at python.org>,
> David Abrahams  <dave at boost-consulting.com> wrote:
> >
> >I was under the impression that both the current directory *and* the
> >python library directory were already, automatically, in sys.path, so
> >I'm really surprised to see this.  Am I doing something wrong, or is
> >this simply the expected behavior (and if so, where is it documented)?
> 
> IIRC (without bother to test), there has been some change in the
> definition of "current directory" -- it used to be the actual current
> directory of os.getcwd(), but since changed to the startup directory.

In 2.3 and later, at least (sorry, no 2.2 and earlier around to check),
site.py makes every directory along sys.path an absolute path at Python
startup.  This _should_ probably be documented at
<http://docs.python.org/lib/module-site.html>, but it doesn't appear to
be clearly stated there (the page only speaks of site's job of
"appending site specific paths", and not of the other jobs it also
performs, such as normalizing sys.path by turning all paths into
absolute ones and removing duplicates).


Alex


From jconxus at gmail.com  Fri Mar 30 20:08:31 2007
From: jconxus at gmail.com (jconxus at gmail.com)
Date: 30 Mar 2007 17:08:31 -0700
Subject: Web-based personal development co. looking for programmers
Message-ID: <1175299711.012374.312610@n59g2000hsh.googlegroups.com>

Mylinia.com
Live purposefully!

Who:
Mylinia.com is a personal development company located in the heart of
the Silicon Valley, started in 2006 by 3 Stanford business school
students who are dedicated to helping people all over the world reach
their full potential.  We envision a better world where people have
the freedom to live purposefully, learn freely, and love
unconditionally.

What:
We provide an online platform that enables our co-owners (not users;
we?re not here to use anybody!) to customize their personal
development experiences and realized their dreams by allowing them to
find resources that are relevant to their passions.

How:
We trademarked a straightforward formula Problems + Passions =
Purpose? to help people begin the process of answering life?s most
important question, ?What is my purpose??  Via our online community,
co-owners are able to share their journey, tag and find tools, set
goals, and engage their best friends in the pursuit of their
purpose.

Software Engineer
We?re seeking a bright, energetic, and dedicated team player who has
strong, versatile computer science fundamentals who will be a core
contributor to architecting, building, and scaling mylinia?s backend.
You will need strong skills in application and server-side
development; experience and/or interest in designing and maintaining
high-volume systems is a big plus.

Responsibilities:
Architect and maintain a reliable backend system to support dynamic
web frontend
* Assist in scaling and optimizing communication integration between
frontend and backend
* Assist in testing and optimizing regularly scheduled releases
* Proactively recommend architecture changes and suggest new coding
practices
* Collaborate with frontend programmers to optimize scalability and
network efficiency
* Stay up-to-date with new technologies

Ideal Candidate:
The Senior .NET Developer will have at least five years of experience
in software development and IT. You must have good communication
skills and can work with other developers and independently. You are
expected to take a lead role in project management.

Compensation:
Negotiable mix of equity and salary dependent on cultural fit, skill
set, experience, and the amount of time you are able to commit per
through our series A round.

Process:
Email Jullien Gordon with your resume at
Gordon_Jullien at gsb.stanford.edu



From olsonas at gmail.com  Wed Mar 14 15:14:00 2007
From: olsonas at gmail.com (Drew)
Date: 14 Mar 2007 12:14:00 -0700
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <mailman.5103.1173898419.32031.python-list@python.org>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<mailman.5103.1173898419.32031.python-list@python.org>
Message-ID: <1173899640.547531.99260@l75g2000hse.googlegroups.com>

On Mar 14, 2:53 pm, s... at pobox.com wrote:
>     >> When is it appropriate to use dict.items() vs dict.iteritems.
>
>     Laurent> Both work, you may prefer xrange/iteritems for iteration on
>     Laurent> large collections...
>
> I find "iter<anything>" to be extremely ugly and hope to avoid using them
> altogether until they are gone in Py3k.
>
> Skip

Skip -

Ugly, maybe, but don't you take a decent performance hit when loading
the entire dict into memory at once? Especially if the dict is large?



From mailmaverick666 at gmail.com  Wed Mar  7 03:47:43 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Wed, 7 Mar 2007 14:17:43 +0530
Subject: Videos
	inside(adult-fun-romantic-love-movies-songs)singles-profiles-chating-mails-earn
	money !
In-Reply-To: <1173256550.541680.176410@8g2000cwh.googlegroups.com>
References: <1173256550.541680.176410@8g2000cwh.googlegroups.com>
Message-ID: <180b672e0703070047o4d996727sca330a8e2573cba@mail.gmail.com>

This is totally un-acceptable.This list is not for advertising things that
are not related to python

On 7 Mar 2007 00:35:50 -0800, sudha madhuri <sudharani4fun at yahoo.com> wrote:
>
> Videos inside(adult-fun-romantic-love-movies-songs)singles-profiles-
> chating-mails-earn money !
>
> http://tinyurl.com/yr28hh
>
> India's largest social network place-Many people with good profiles.
> chating-videos-messages-mails-contest-parttime earning-unlimited fun-1
> stop for everything
>
> signup and get fun
> http://tinyurl.com/yr28hh
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From mattheww at chiark.greenend.org.uk  Fri Mar  9 14:00:58 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 09 Mar 2007 19:00:58 +0000 (GMT)
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<m11wjyy7p5.fsf@chezmarshall.freeserve.co.uk>
	<slrnev2m9v.179.nick@irishsea.home.craig-wood.com>
	<45f185f2$0$21511$426a34cc@news.free.fr>
Message-ID: <Aai*6UgFr@news.chiark.greenend.org.uk>

Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>> Nick Craig-Wood a ecrit :
>>>>> I use # FIXME for this purpose or /* FIXME */ in C etc.
>>>>>
>>>>> I have an emacs macro which shows it up in bright red / yellow text
>>>>> so it is easy to see

> Thanks you both.

For what it's worth, sufficiently recent versions of emacs python-mode
have this built in.

-M-



From mail at timgolden.me.uk  Thu Mar  1 12:26:34 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 01 Mar 2007 17:26:34 +0000
Subject: Reading csv files using SQL
In-Reply-To: <45e70a14$0$37202$4fafbaef@reader3.news.tin.it>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>	<45e6731d$0$4786$4fafbaef@reader4.news.tin.it>	<mailman.4568.1172751025.32031.python-list@python.org>
	<45e70a14$0$37202$4fafbaef@reader3.news.tin.it>
Message-ID: <45E70CCA.6050205@timgolden.me.uk>

Pablo was Paolo wrote:
> skip at pobox.com ha scritto:
>> If you want to work directly with the files why not just use Python's csv
>> module?
> 
> Now, with Java, I use the same class to read several databases and csv 
> files (with SQL instructions).
> I'd like to find a library for using the same approach in Python.

I vaguely remember that you can get an ODBC driver for CSV. If I'm
right, you could access it using one of the several Python ODBC
DBAPI modules... just a thought.

TJG


From deets at nospam.web.de  Fri Mar 30 05:00:49 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 Mar 2007 11:00:49 +0200
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <euid24$ugc$1@online.de>
References: <euid24$ugc$1@online.de>
Message-ID: <5741ueF2bgl92U1@mid.uni-berlin.de>

Max Kubierschky schrieb:
> Hello,
> 
> I'm planning to give a game programming course for kids of mixed age.
> For this, I am looking for an open source 2D game development kit.
> I am also willing to participate in the development of the development kit.
> 
> Features I'd like to see
> - Possibility to construct simple games via drag and drop without 
> programming
> - Integration into an IDE
> - Based on Java or Python
> Pluses:
> - Good Tutorial
> - German documentation

Squeak. Smalltalk, but especially targeted at your requirements.

http://www.squeak.org/

Diez


From chowroc.z at gmail.com  Fri Mar 16 08:34:29 2007
From: chowroc.z at gmail.com (Rocky Zhou)
Date: 16 Mar 2007 05:34:29 -0700
Subject: getopt or optparse options/arguments wrapping?
Message-ID: <1174048469.334735.185750@l77g2000hsb.googlegroups.com>

I wonder is there any way to make the wrapper program can wrap options
&& arguments for the  the  subprocess/command the wrapper will
execute? by getopt or optparse module?

This is something like the shell script like this:
optwrap=""
while [ $# -gt 0 ]; do
   case $1 in
       -a) do-something; shift
       ;;
       -b) do-something; shift
       ;;
       *)  optwrap="$optwrap $1 $2"
          # collect the option and argument
           shift
       ;;
   esac
   shift
done

$command $optwrap
# execute the command with $optwrap as subprocess

I want that all the options and arguments which are feed to this
scripts command line will be used by executing the sub command.

I need this because I now have finished a fs_backup script written in
python, it will execute tar && find to complete full and
differentiating/incremental backup for the file system level files,
and their restoring. This script will do different things by the
command line arguments, and execute find/tar in different ways, but
for being more flexible, I want some options of tar/find can also been
specified from the command line directly, and the script just transmit
those to tar/find simply.

Is there anyone can give me some advices?

Thank you.



From andre.roberge at gmail.com  Sun Mar 11 19:35:23 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 11 Mar 2007 16:35:23 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <1173653364.059431.19990@v33g2000cwv.googlegroups.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
Message-ID: <1173656123.303867.134390@64g2000cwx.googlegroups.com>

On Mar 11, 7:49 pm, "Paddy" <paddy3... at googlemail.com> wrote:
>
> Isn't negative zero mathematically the same as zero? Isn't -0 just an
> artefact of the representation of floating point numbers? Shouldn't
> f(0) == f(-0) for all functions f?

Read the original post again...  The relevant part is:
====
I'm working in a situation
involving complex arithmetic where branch cuts, and hence signed
zeros, are important, and it would be handy if the above code could be
relied upon to do the right thing.
====

You may want to read about branch cuts and complex arithmetics.  I
don't mean this as a putdown - simply as a useful suggestion for you
to read.

Andr?





From python at hope.cz  Mon Mar  5 14:47:15 2007
From: python at hope.cz (Johny)
Date: 5 Mar 2007 11:47:15 -0800
Subject: Webserver balance load
Message-ID: <1173124034.130806.316750@30g2000cwc.googlegroups.com>

Can anyone suggest a way how to balance load on Apache server where I
have Python scripts running?
For example I have 3 webservers( Apache servers) and I would like to
sent user's request to one of the three server depending on a load on
the server.
Thank you .
L.



From crosseyedpenguin at cox.net  Sun Mar  4 21:18:20 2007
From: crosseyedpenguin at cox.net (Roger)
Date: Sun, 04 Mar 2007 19:18:20 -0700
Subject: Alternatives for Extracting EXIF and JPEG Data from Images
In-Reply-To: <mailman.4661.1173053793.32031.python-list@python.org>
References: <45EB3404.3030401@cox.net>
	<mailman.4661.1173053793.32031.python-list@python.org>
Message-ID: <45EB7DEC.4080702@cox.net>

Max Erickson wrote:
> Roger <crosseyedpenguin at cox.net> wrote:
> 
>> Does anybody have a pointer to a Python library/utility that will
>> extract the chrominance and luminance quantization tables from
>> JPG images? 
>>
>> I have been using the _getexif method from PIL, which works fine,
>> but doesn't extract the quantization data.  I am a bit fuzzy on
>> the terminology, but the quantization data  seems to be JPEG data
>> rather than EXIF data.  One utility that extracts the
>> quantization tables is JPEGsnoop -- there is a link to download
>> the utility here: 
>>    http://www.impulseadventure.com/photo/jpeg-quantization.html
>>
>> The source code for the above isn't available and may not be
>> callable from a Python script even  if it were available.
>>
>> Roger
>>
> 
> I don't know what the format is, etc, but jpegs I open with PIL have a 
> quantization attribute, e.g:
> 
>>>> im.quantization
> {0: array('b', [6, 4, 4, 5, 4, 4, 6, 5, 5, 5, 6, 6, 6, 7, 9, 14, 9, 9, 
> 8, 8, 9, 18, 13, 13, 10, 14, 21, 18, 22, 22, 21, 18, 20, 20, 23, 26, 
> 33, 28, 
> <snip a bunch more numbers>
> 
> 
> max
> 

Thank you, I wasn't aware of the quantization method.  I was unable to 
find any documentation for it.

The 0: array() output would appear to be the luminance 8x8 array and the 
1: array() to be the chrominance 8x8 array.  A curiosity is the values 
disagree with the output of the JPEGsnoop utility.  For my Canon 
Powershot S2 IS set to "fine", im.quantization yields (after formatting):

{0: array('b', [
1, 1, 1, 2, 1, 1, 2, 2,
2, 2, 3, 2, 2, 3, 3, 6,
4, 3, 3, 3, 3, 7, 5, 8,
4, 6, 8, 8, 10, 9, 8, 7,
11, 8, 10, 14, 13, 11, 10, 10,
12, 10, 8, 8, 11, 16, 12, 12,
13, 15, 15, 15, 15, 9, 11, 16,
17, 15, 14, 17, 13, 14, 14, 14
]),

1: array('b', [
4, 4, 4, 5, 4, 5, 9, 5,
5, 9, 15, 10, 8, 10, 15, 26,
19, 9, 9, 19, 26, 26, 26, 26,
13, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26])}

The JPEGsnoop output for the same jpg file is (pardon the line wrap):

   Precision=0 bits
   Destination ID=0 (Luminance)
     DQT, Row #0:   1   1   1   2   3   6   8  10  AnnexRatio:  16.0 
11.0  10.0   8.0   8.0   6.7   6.4   6.1
     DQT, Row #1:   1   1   2   3   4   8   9   8  AnnexRatio:  12.0 
12.0   7.0   6.3   6.5   7.3   6.7   6.9
     DQT, Row #2:   2   2   2   3   6   8  10   8  AnnexRatio:   7.0 
6.5   8.0   8.0   6.7   7.1   6.9   7.0
     DQT, Row #3:   2   2   3   4   7  12  11   9  AnnexRatio:   7.0 
8.5   7.3   7.3   7.3   7.3   7.3   6.9
     DQT, Row #4:   3   3   8  11  10  16  15  11  AnnexRatio:   6.0 
7.3   4.6   5.1   6.8   6.8   6.9   7.0
     DQT, Row #5:   3   5   8  10  12  15  16  13  AnnexRatio:   8.0 
7.0   6.9   6.4   6.8   6.9   7.1   7.1
     DQT, Row #6:   7  10  11  12  15  17  17  14  AnnexRatio:   7.0 
6.4   7.1   7.3   6.9   7.1   7.1   7.2
     DQT, Row #7:  14  13  13  15  15  14  14  14  AnnexRatio:   5.1 
7.1   7.3   6.5   7.5   7.1   7.4   7.1
     Approx quality factor = 92.96 (scaling=14.08 variance=5.28)
   ----
   Precision=0 bits
   Destination ID=1 (Chrominance)
     DQT, Row #0:   4   4   5   9  15  26  26  26  AnnexRatio:   4.3 
4.5   4.8   5.2   6.6   3.8   3.8   3.8
     DQT, Row #1:   4   4   5  10  19  26  26  26  AnnexRatio:   4.5 
5.3   5.2   6.6   5.2   3.8   3.8   3.8
     DQT, Row #2:   5   5   8   9  26  26  26  26  AnnexRatio:   4.8 
5.2   7.0  11.0   3.8   3.8   3.8   3.8
     DQT, Row #3:   9  10   9  13  26  26  26  26  AnnexRatio:   5.2 
6.6  11.0   7.6   3.8   3.8   3.8   3.8
     DQT, Row #4:  15  19  26  26  26  26  26  26  AnnexRatio:   6.6 
5.2   3.8   3.8   3.8   3.8   3.8   3.8
     DQT, Row #5:  26  26  26  26  26  26  26  26  AnnexRatio:   3.8 
3.8   3.8   3.8   3.8   3.8   3.8   3.8
     DQT, Row #6:  26  26  26  26  26  26  26  26  AnnexRatio:   3.8 
3.8   3.8   3.8   3.8   3.8   3.8   3.8
     DQT, Row #7:  26  26  26  26  26  26  26  26  AnnexRatio:   3.8 
3.8   3.8   3.8   3.8   3.8   3.8   3.8
     Approx quality factor = 88.24 (scaling=23.52 variance=21.42)

I don't understand the "AnnexRatio" data JPEGsnoop is adding to each 
row.  Anyone have an explanation on how to translate the im.quantization 
values to the JPEGsnoop values?  Or am I looking at two different types 
of "quantization" tables?

Roger



From ianare at gmail.com  Sun Mar 25 19:07:16 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: 25 Mar 2007 16:07:16 -0700
Subject: call to function by text variable
In-Reply-To: <1174863710.576989.235290@o5g2000hsb.googlegroups.com>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
	<eu6ufc$s0q$1@nemesis.news.tpi.pl>
	<1174863710.576989.235290@o5g2000hsb.googlegroups.com>
Message-ID: <1174864036.639848.178440@b75g2000hsg.googlegroups.com>

On Mar 25, 7:01 pm, "ianar?" <ian... at gmail.com> wrote:
> Cool now I can run it through the translator.
>
> ops = (_("Directory"), _("Replace"), _("ChangeCase"),
>        _("Move"), _("Swap"), _("Insert"), _("ChangeLength"))
>
> self.operations.insert(pos, getattr(operations, ops[n]).Panel(self,
> main))
>
> Thanks guys!

erm ... brainfart LOL. But now I can link it to the translated list.



From adriancico at gmail.com  Thu Mar  1 16:24:17 2007
From: adriancico at gmail.com (adriancico at gmail.com)
Date: 1 Mar 2007 13:24:17 -0800
Subject: Questions about app design - OOP with python classes
In-Reply-To: <45e733aa$0$25247$426a74cc@news.free.fr>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
Message-ID: <1172784257.370311.272620@8g2000cwh.googlegroups.com>

On Mar 1, 9:45 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:

> As a side note : hungarian notation is usually considered bad form here.
> Look here for usual naming conventions:http://www.python.org/dev/peps/pep-0008/

Thanks for the tip. It's been too many years of VB6, and its difficult
to leave old habits
behind :-)

>
> >     With this design, pretty much everything is encapsulated in it
> > respective
> > class. However, that means that the main program logic is in the Frame
> > class.
>
> What do you call "main program logic" exactly ?

What I mean is that in the frame code is where all decisions are
taken. The frame handles the
other controls events, decides what needs to be done, calls the
necesary methods of the other controls, etc. The other widgets just
"do the work" when called from the Frame. But this is not
necesarily bad, as you point out below.

> Using the main frame as a mediator between the different widgets is a
> well-known design pattern, named - suprisingly - mediator. The
> motivation is that it avoid each and every widget to know about the
> existence of every other widget. You may want to read about this pattern
> - but note that most litterature about design patterns is expressed in
> terms of statically typed languages (Java, C++ etc), and that dynamic
> languages like Python usually don't need that much boilerplate and
> complication (IOW : try to understand the pattern itself, not to blindly
> apply it).
>
> What's your looking for IMHO is the "controller" part - the one that
> glue together the "view" (main frame and all it's widgets) and the
> "model" (mostly, your document). Here again, googling for
> "model/view/controller" (MVC) may be a good idea.
>

I understand (I've been in wikipedia :-) ). Right now the Frame is the
controller as well
as the view. Moving out the "controller" code to another module seems
to me the
path to follow. I'll start to look out for MVC related material.

My problem was that, altough I knew OOP basics, I didn't know how to
apply them exactly. Thanks
for your answer, it has cleared many things.

> Note that there's nothing Python-specific in your question. But since
> comp.object is one of the worst places on earth to ask questions about OO...

I am developing in Python, so it made sense to me to post here. But
you are right, the question
is off-topic. Sorry for that.

Thanks again and regards
Adri?n Garrido



From hg at nospam.org  Thu Mar 15 03:22:47 2007
From: hg at nospam.org (hg)
Date: Thu, 15 Mar 2007 08:22:47 +0100
Subject: looking for a simple crypto library
References: <mailman.5125.1173940891.32031.python-list@python.org>
Message-ID: <WLbKh.15650$zJ1.1142@newsfe24.lga>

P?nar Yanarda? wrote:

>  Hi all,
> 
> I'm looking for a crypto library which can simply:
> 
> - extracts a public key from a (X.509) certificate,
> 
> - supports public-key algorithms.
> 
> Any suggestions?
> 
> With love,
> --
> P?nar "PINguAR" Yanarda?
> http://pinguar.org
pyopenssl ?



From carsten at uniqsys.com  Mon Mar 19 15:06:24 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 19 Mar 2007 15:06:24 -0400
Subject: Load three different modules which have the same name
In-Reply-To: <1174329764.310542.298430@b75g2000hsg.googlegroups.com>
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
Message-ID: <1174331184.3472.24.camel@dot.uniqsys.com>

On Mon, 2007-03-19 at 11:42 -0700, abcd wrote:
> nevermind this took care of it:
> 
> import sys
> 
> def tryAllThree():
>     a = "c:\\alpha"
>     b = "c:\\beta"
>     g = "c:\\gamma"
> 
>     sys.path.append(a)
>     import Person
>     alpha = Person.Person()
> 
>     sys.path.remove(a)
>     sys.path.append(b)
>     reload(Person)
>     beta = Person.Person()
> 
>     sys.path.remove(b)
>     sys.path.append(g)
>     reload(Person)
>     gamma = Person.Person()

That sort of works, but it's really unclean.

I suggest you turn each directory that contains an implementation of
Person into a package. That can be done by simply putting an __init__.py
file into each of those directories. This __init__.py file can be empty
or only contain a "pass" statement, but as long as it's there, the
directory containing it becomes a package.

Then, add the directory that contains your packages (C:\ in your
example) to your path, and you can import and use your Person modules
like this:

    import alpha.Person, beta.Person, gamma.Person
    alpha_person = alpha.Person.Person()
    beta_person = beta.Person.Person()
    gamma_person = gamma.Person.Person()

The main advantages are that the different implementations of Person
don't shadow each other in your name space, and you don't gratuitously
force module reloads.

Hope this helps,

Carsten.




From aisaac at american.edu  Thu Mar  1 09:18:05 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 01 Mar 2007 14:18:05 GMT
Subject: design question: no new attributes
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05><mailman.4475.1172614860.32031.python-list@python.org><3c5Fh.3664$Tg7.2156@trnddc03>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08>
	<45e60fdc$0$30655$426a34cc@news.free.fr>
Message-ID: <xgBFh.4185$854.1692@trnddc04>


"Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> wrote in
message news:45e60fdc$0$30655$426a34cc at news.free.fr...
> I don't share your definition of "reasonable". But you should have
> guessed by now

My view may be shaped by a different experience.
I have found dynamic attribute creation convenient
when doing something "quick and dirty", but I have
never wanted it as a design feature in a more serious
project.

Can you give me an example where design considerations
make dynamic attribute creation particularly desirable?

Thank you,
Alan Isaac




From http  Wed Mar 14 17:16:41 2007
From: http (Paul Rubin)
Date: 14 Mar 2007 13:16:41 -0800
Subject: dict.items() vs dict.iteritems and similar questions
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
Message-ID: <7xlkhzttja.fsf@ruckus.brouhaha.com>

Laurent Pointal <laurent.pointal at limsi.fr> writes:
> Both work, you may prefer xrange/iteritems for iteration on large
> collections, you may prefer range/items when processing of the result
> value explicitly need a list (ex. calculate its length) or when you are
> going to manipulate the original container in the loop.

You can use len(d) if d is a dict.


From bdesth.quelquechose at free.quelquepart.fr  Tue Mar 13 16:53:22 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 21:53:22 +0100
Subject: Iterating across a filtered list
In-Reply-To: <7xmz2hndh0.fsf@ruckus.brouhaha.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
	<1173812047.578137.223430@j27g2000cwj.googlegroups.com>
	<7xmz2hndh0.fsf@ruckus.brouhaha.com>
Message-ID: <45f70709$0$5892$426a34cc@news.free.fr>

Paul Rubin a ?crit :
> "Drew" <olsonas at gmail.com> writes:
> 
>>You're exactly on the mark. I guess I was just wondering if your first
>>example (that is, breaking the if statement away from the iteration)
>>was preferred rather than initially filtering and then iterating.
> 
> 
> I think the multiple statement version is more in Python tradition.

I don't know if I qualify as a Python traditionalist, but I'm using 
Python since the 1.5.2 days, and I usually favor list comps or generator 
expressions over old-style loops when it comes to this kind of operations.

> Python is historically an imperative, procedural language with some OO
> features.

Python has had functions as first class objects and (quite-limited-but) 
anonymous functions, map(), filter() and reduce() as builtin funcs at 
least since 1.5.2 (quite some years ago).

>  Iterators like that are a new Python feature

List comps are not that new (2.0 or 2.1 ?):
print "\n".join([contact for name, contact in contacts.items() \
                  if search.match(name)])


> and they have
> some annoying characteristics, like the way they mutate when you touch
> them. 

While sequences are iterables, all iterables are not sequences. Know 
what you use, and you'll be fine.

> It's usually safest to create and consume them in the same
> place, e.g. creating some sequence and passing it through map, filter, etc.

Safest ? Why so ?


From mail at microcorp.co.za  Tue Mar 13 01:50:06 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 13 Mar 2007 07:50:06 +0200
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com><1173629090.993914.55570@30g2000cwc.googlegroups.com><mailman.4944.1173629658.32031.python-list@python.org><1173631052.614449.51370@h3g2000cwc.googlegroups.com><no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net><7xy7m3tqq8.fsf@ruckus.brouhaha.com><1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<1173677725.341019.270100@j27g2000cwj.googlegroups.com>
Message-ID: <003001c76533$74ad4b40$03000080@hendrik>

 "Paddy" <pa...y3118 at googlemail.com> wrote

> 
> Hey, I'm still learnin'. Sweet!
> 
contrary to popular belief, the answer to life,
the universe, happiness and everything is
not 42, but the above.

- Hendrik



From cfbolz at gmx.de  Wed Mar 28 12:04:30 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 18:04:30 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <6AFD137D-BE66-4BD6-84C5-0D473FCC3377@stackless.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>	<1175041489.368797.281750@d57g2000hsg.googlegroups.com>	<460A297A.5030605@gmx.de>
	<6AFD137D-BE66-4BD6-84C5-0D473FCC3377@stackless.com>
Message-ID: <460A920E.504@gmx.de>

Hi Christian!

Christian Tismer wrote:
> On 28.03.2007, at 10:38, Carl Friedrich Bolz wrote:
> 
>> Brain error on our side: the gc_pypy.dll is the dll of the Boehm  
>> garbage
>> collector, which you would need to compile yourself (which makes
>> precompiled binaries a bit useless :-) ). We updated the zip file,  
>> would
>> you mind checking whether it works better now?
> 
> Why can't we provide a pre-compiled binary?
> Is this a license issue?

We can. That's exactly what we did.

Cheers,

Carl Friedrich Bolz


From MonkeeSage at gmail.com  Sat Mar  3 21:43:57 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 18:43:57 -0800
Subject: portable Python ifconfig
In-Reply-To: <1172973137.492188.85100@s48g2000cws.googlegroups.com>
References: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
	<1172971079.137861.316170@h3g2000cwc.googlegroups.com>
	<1172973137.492188.85100@s48g2000cws.googlegroups.com>
Message-ID: <1172976237.808280.292150@j27g2000cwj.googlegroups.com>

Bart,

Can you try this and let us know if it works for FreeBSD?

import socket, fcntl, struct

def _ifinfo(sock, addr, ifname):
    iface = struct.pack('256s', ifname[:15])
    info  = fcntl.ioctl(sock.fileno(), addr, iface)
    if addr == 0x8927:
        hwaddr = []
        for char in info[18:24]:
            hwaddr.append(hex(ord(char))[2:])
        return ':'.join(hwaddr)
    else:
        return socket.inet_ntoa(info[20:24])

def ifconfig(ifname):
    ifreq = {'ifname': ifname}
    sock  = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    try:
        ifreq['addr']    = _ifinfo(sock, 0x8915, ifname) # SIOCGIFADDR
        ifreq['brdaddr'] = _ifinfo(sock, 0x8919, ifname) #
SIOCGIFBRDADDR
        ifreq['netmask'] = _ifinfo(sock, 0x891b, ifname) #
SIOCGIFNETMASK
        ifreq['hwaddr']  = _ifinfo(sock, 0x8927, ifname) #
SIOCSIFHWADDR
    except:
        pass
    sock.close()
    return ifreq

Regards,
Jordan



From arnodel at googlemail.com  Sun Mar  4 15:03:14 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 4 Mar 2007 12:03:14 -0800
Subject: looking for Java final/Ruby freeze functionality in Python
In-Reply-To: <45eb1fdf$1@news.vo.lu>
References: <45eb1fdf$1@news.vo.lu>
Message-ID: <1173038594.837631.322630@c51g2000cwc.googlegroups.com>

On Mar 4, 7:38 pm, Antoine De Groote <anto... at vo.lu> wrote:
> Hello,
>
> I've been googling for quite a while now but can't find anything about a
> function/keyword to make a list (or something else) immutable. Could
> anybody point me to docs about this matter or give me a reason why this
> (apparently) doesn't exist in Python?

First result from google 'python freeze object':

http://www.python.org/dev/peps/pep-0351/

The PEP was rejected but the document contains a link to a discussion
about why there is no such thing in python:

http://mail.python.org/pipermail/python-dev/2006-February/060793.html

HTH

--
Arnaud



From thomas.dunham at gmail.com  Wed Mar  7 18:48:26 2007
From: thomas.dunham at gmail.com (Tombo)
Date: 7 Mar 2007 15:48:26 -0800
Subject: Calling a function with unknown arguments?
In-Reply-To: <1173308108.239943.174560@j27g2000cwj.googlegroups.com>
References: <1173308108.239943.174560@j27g2000cwj.googlegroups.com>
Message-ID: <1173311306.370427.219650@c51g2000cwc.googlegroups.com>

On Mar 7, 10:55 pm, "Rob" <crow... at mit.edu> wrote:
> I can get a list of a function's arguments.>>> def bob(a, b):
>
> ...     return a+b
> ...>>> bob.func_code.co_varnames
>
> ('a', 'b')
>
> Let's say that I also have a dictionary of possible arguments for this
> function.
>
> >>> possible = {'a':10, 'b':5, 'c':-3}
>
> How do I proceed to call bob(a=10, b=5) with this information?
>
> Thanks!

You can do this with a list comprehension:
bob(*[possible[k] for k in bob2.func_code.co_varnames])

The LC creates a list of arg values in the same order as the var names
for the function. Putting a * before the list when you call bob()
turns that list into it's arguments.


Alternativly (and this may not be useful) you can call a function with
a dictionary of arguments:

def bob(**kwargs):
    print kwargs

possible = {'a' : 10, 'b':5, 'c':-3}


>>> bob(**possible)
{'a': 10, 'c': -3, 'b': 5}
>>>

Tom



From aisaac at american.edu  Thu Mar  1 09:39:17 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 01 Mar 2007 14:39:17 GMT
Subject: design question: no new attributes
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05>
	<mailman.4475.1172614860.32031.python-list@python.org>
	<3c5Fh.3664$Tg7.2156@trnddc03> <54njqjF21q8jlU1@mid.individual.net>
Message-ID: <pABFh.4186$854.3719@trnddc04>


"greg" <greg at cosc.canterbury.ac.nz> wrote in message
news:54njqjF21q8jlU1 at mid.individual.net...
> There's a problem with that when you want to subclass:

Agreed.  The following addresses that and, I think, some
of the other objections that have been raised.
Alan

class Lockable:
    a = 0
    def __init__(self, lock=False):
        self.b = 1
        self.lock = lock
    def __setattr__(self, attr, val):
        if not hasattr(self,attr) and hasattr(self,'lock') and self.lock:
            raise ValueError("This object accepts no new attributes.")
        self.__dict__[attr] = val




From paul at boddie.org.uk  Wed Mar 14 08:55:07 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Mar 2007 05:55:07 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
Message-ID: <1173876907.128955.57410@o5g2000hsb.googlegroups.com>

On 14 Mar, 13:37, "tereglow" <tom.rectenw... at eglow.net> wrote:
> Hello all,
>
> I come from a shell/perl background and have just to learn python.

Welcome aboard!

>  To start with, I'm trying to obtain system information from a Linux
> server using the /proc FS.  For example, in order to obtain the amount
> of physical memory on the server, I would do the following in shell:
>
> grep ^MemTotal /proc/meminfo | awk '{print $2}'
>
> That would get me the exact number that I need.  Now, I'm trying to do
> this in python.  Here is where I have gotten so far:
>
> memFile = open('/proc/meminfo')
> for line in memFile.readlines():
>     print re.search('MemTotal', line)

You could even use the regular expression '^MemTotal' as seen in your
original, or use the match function instead of search. However...

> memFile.close()
>
> I guess what I'm trying to logically do is... read through the file
> line by line, grab the pattern I want and assign that to a variable.
> The above doesn't really work, it comes back with something like
> "<_sre.SRE_Match object at 0xb7f9d6b0>" when a match is found.

This is because re.search and re.match (and other things) return match
objects if the regular expression has been found in the provided
string. See this page in the library documentation:

http://docs.python.org/lib/match-objects.html

> Any help with this would be greatly appreciated.

The easiest modification to your code is to replace the print
statement with this:

    match = re.search('MemTotal', line)
    if match is not None:
        print match.group()

You can simplify this using various idioms, I imagine, but what you
have to do is to test for a match, then to print the text that
matched. The "group" method lets you get the whole matching text (if
you don't provide any arguments), or individual groups (applicable
when you start putting groups in your regular expressions).

Paul



From bj_666 at gmx.net  Sun Mar  4 04:38:51 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 04 Mar 2007 10:38:51 +0100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
Message-ID: <pan.2007.03.04.09.38.50.319215@gmx.net>

In <mailman.4638.1172976888.32031.python-list at python.org>, Nicholas
Parsons wrote:

> Just from my computer science background when I see pop(), I think of a
> stack data structure.

Then question your presumptions.  There are also many people thinking
`list` must be something with nodes and pointers when they see the
interface and usage of Python lists.

> But then again, there are other examples of ambiguity in the python
> language such as allowing operators like '+' to be overloaded.  Why not
> just have a "add()" method like Java?

Why does this remove ambiguity?  I even would expect different behaviour
from both.  I expect the ``+`` operator to return either an immutable or
entirely new object, while `add()` can be something on containers that
mutates the object.

Ciao,
	Marc 'BlackJack' Rintsch


From nmw at ion.le.ac.uk  Thu Mar 22 13:11:10 2007
From: nmw at ion.le.ac.uk (Nigel Wade)
Date: Thu, 22 Mar 2007 17:11:10 +0000
Subject: On Java's Interface (the meaning of interface in computer
	programing)
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnf5DTKfj55_bnZ2dnUVZ_uzinZ2d@comcast.com>
Message-ID: <etudbe$gbf$1@south.jnrs.ja.net>

Lew wrote:

> Jim Burton wrote:
>> Or you could stop feeding the trolls.
> 
> People need to stop saying that. The original post was a detailed if incorrect 
> exposition of Java information. How in the world do you rate that trollish?

a) Xah's posting history.
b) the cross-posting
c) the advocacy of the contents

> 
> I have absolutely no reason to rate the OP as a troll or their post as
trollish.
> 

In time you will learn...

It wasn't even a good troll. To be a good troll the message actually needs to be
interesting enough to get people to read it. 


-- 
Nigel Wade, System Administrator, Space Plasma Physics Group,
            University of Leicester, Leicester, LE1 7RH, UK 
E-mail :    nmw at ion.le.ac.uk 
Phone :     +44 (0)116 2523548, Fax : +44 (0)116 2523555


From steve at holdenweb.com  Mon Mar 26 14:07:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 26 Mar 2007 14:07:26 -0400
Subject: how to abort on syntax errors
In-Reply-To: <1174930640.724685.72160@y80g2000hsf.googlegroups.com>
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
	<1174930640.724685.72160@y80g2000hsf.googlegroups.com>
Message-ID: <eu924v$gat$1@sea.gmane.org>

kyosohma at gmail.com wrote:
> On Mar 26, 12:21 pm, "Josh" <n... at nowhere.com> wrote:
>> I have a lot of except Exception, e statements in my code, which poses some
>> problems. One of the biggest is whenever I refactor even the triviallest
>> thing in my code.
>>
>> I would like python to abort, almost as if it were a compile-time error,
>> whenever it cannot find a function, or if I introduced a syntax error. But,
>> instead, it merrily proceeds on its way.
>>
>> Is there some idiom that you use in situations like these?
>> thanks,
>> josh
> 
> Try sticking in an
> 
> try:
>   #do something
> except SyntaxError, e:
>    print e
>    sys.exit(0)
> except Exception, e:
>    print e
> 
> 
> # You put in as many exceptions as you like.
> 
Of course the main problem with this solution is that a piece of code 
will raise a syntax error when it's compiled (i.e. at module import 
time, or when the main program starts up). So in the case where "#do 
something" has a syntax error it won;t be trapped because the program 
hasn't got to execution by the time the error is detected.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From anton.vredegoor at gmail.com  Sat Mar 24 14:45:41 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sat, 24 Mar 2007 19:45:41 +0100
Subject: A better webpage filter
Message-ID: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl>

Since a few days I've been experimenting with a construct that enables 
me to send the sourcecode of the web page I'm reading through a Python 
script and then into a new tab in Mozilla. The new tab is automatically 
opened so the process feels very natural, although there's a lot of 
reading, filtering and writing behind the scene.

I want to do three things with this post:

A) Explain the process so that people can try it for themselves and say 
"Hey stupid, I've been doing the same thing with greasemonkey for ages", 
or maybe "You're great, this is easy to see, since the crux of the 
biscuit is the apostrophe."  Both kind of comments are very welcome.

B) Explain why I want such a thing.

C) If this approach is still valid after all the before, ask help for 
writing a better Python htmlfilter.py

So here we go:

A) Explain the process

We need :

- mozilla firefox http://en-us.www.mozilla.com/en-US/
- add-on viewsourcewith https://addons.mozilla.org/firefox/394/
- batch file (on windows):
(htmfilter.bat)
d:\python25\python.exe D:\Python25\Scripts\htmlfilter.py "%1" > out.html
start out.html
- a python script:
#htmfilter.py

import sys

def htmlfilter(fname, skip = []):
     f = file(fname)
     data = f.read()
     L = []
     for i,x in enumerate(data):
         if x == '<':
             j = i
         elif x =='>':
             L.append((j,i))
     R = list(data)
     for i,j in reversed(L):
         s = data[i:j+1]
         for x in skip:
             if x in s:
                 R[i:j+1] = ' '
                 break
     return ''.join(R)

def test():
     if len(sys.argv) == 2:
         skip = ['div','table']
         fname = sys.argv[1].strip()
         print htmlfilter(fname,skip)

if __name__=='__main__':
     test()

Now install the htmlfilter.py file in your Python scripts dir and adapt 
the batchfile to point to it.

To use the viewsourcewith add-on to open the batchfile: Go to some 
webpage, left click and view the source with the batchfile.

B) Explain why I want such a thing.

OK maybe this should have been the thing to start with, but hey it's 
such an interesting technique it's almost a waste no to give it a chance 
before my idea is dissed :-)

Most web pages I visit lately are taking so much room for ads (even with 
adblocker installed) that the mere 20 columns of text that are available 
for reading are slowing me down unacceptably. I have tried clicking 
'print this' or 'printer friendly' or using 'no style' from the mozilla 
menu and switching back again for other pages but it was tedious to say 
the least. Every webpage has different conventions. In the end I just 
started editing web pages' source code by hand, cutting out the beef and 
saving it as a html file with only text, no scripts or formatting. But 
that was also not very satisfying because raw web pages are *big*.

Then I found out I often could just replace all 'table' or 'div' 
elements with a space and the page -although not very html compliant any 
more- still loads and often the text looks a lot better. This worked for 
at least 50 percent of the pages and restored my autonomy and 
independence in reading web pages! (Which I do a lot by the way, maybe 
for most people the problem is not very irritating, because they don't 
read as much? Tell me that too, I want to know :-)

C) Ask help writing a better Python htmlfilter.py

Please. You see the code for yourself, this must be done better :-)

A.


From steve at holdenweb.com  Thu Mar 22 11:23:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 11:23:25 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <Xns98FB8961DA528duncanbooth@127.0.0.1>
References: <ett5h2$1ll$1@sea.gmane.org>	<mailman.5443.1174553746.32031.python-list@python.org>
	<Xns98FB8961DA528duncanbooth@127.0.0.1>
Message-ID: <etu740$vir$2@sea.gmane.org>

Duncan Booth wrote:
> Steve Holden <steve at holdenweb.com> wrote:
> 
>> Help me out here. It looks as though the real syntax should 
>> be something like
>>
>> assignment_stmt       ::=       (target_list "=")+ expression_list |
>>                                  (target_list "=")+ assignment_stmt
> 
> That is precisely the point. If it was:
> 
> assignment_stmt       ::=       (target_list "=") expression_list |
>                                  (target_list "=") assignment_stmt
> 
> (i.e. removing the '+' which your eyes jumped over)
> then the actual assignments would have to apply right to left with each 
> assignment giving the result for the next one.
> 
> But since it is:
> 
> assignment_stmt       ::=       (target_list "=")+ expression_list
> 
> the repeated target lists may be expected, and are indeed defined, to 
> assign left to right.

Thanks, I see the plus sign now and appreciate that it indicates "one or 
more of", so the syntax is correct. But syntax doesn't imply semantics, 
so a left-recursive or right-recursive syntax formulation wouldn't 
require any change to the semantics of assignment.

In other words,

assignment_stmt       ::=       (target_list "=") expression_list |
                                  (target_list "=") assignment_stmt

and

assignment_stmt       ::=       (target_list "=") assignment_stmt |
                                  (target_list "=") expression_list

are entirely equivalent, and neither imply any order of execution. I'm 
sure you understand that syntax only specifies what's legal, not how it 
should be interpreted.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From bignose+hates-spam at benfinney.id.au  Wed Mar 14 20:58:11 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 Mar 2007 11:58:11 +1100
Subject: Circular Class Logic
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
Message-ID: <87slc79vbw.fsf@benfinney.id.au>

half.italian at gmail.com writes:

> Short of making 'Disk' no longer a subclass of Folder, is there any
> other way to include a subclassed instance in the base class of that
> object? (this is very hard to put in to words)

It's a little difficult to visualise what you're describing, but IIUC
your problem is of this form:

===== foo.py =====
import bar

class Foo(bar.Bar):
    pass
=====

===== bar.py =====
import baz

class Bar(baz.Baz):
    pass
=====

===== baz.py =====
import foo

class Baz(foo.Foo):
    pass
=====

That is, each of the classes want to inherit from the others.

The usual solution in these cases is to find the common required
functionality and factor that out to a separate class that is then the
superclass of two of the existing classes, breaking the circle.

===== wibble.py =====
# no dependencies

class Wibble(object):
    pass
=====

===== foo.py =====
import wibble
import bar

class Foo(wibble.Wibble, bar.Bar):
    pass
=====

===== baz.py =====
import wibble

class Baz(wibble.Wibble):
    pass
=====

Note that Baz no longer subclasses foo.Foo, and both Foo and Baz get
the common functionality they share from wibble.Wibble.

-- 
 \     "Buy not what you want, but what you need; what you do not need |
  `\           is expensive at a penny."  -- Cato, 234-149 BC, Relique |
_o__)                                                                  |
Ben Finney



From vinjvinj at gmail.com  Tue Mar 13 23:08:14 2007
From: vinjvinj at gmail.com (vj)
Date: 13 Mar 2007 20:08:14 -0700
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <mailman.5051.1173838059.32031.python-list@python.org>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>
	<mailman.5051.1173838059.32031.python-list@python.org>
Message-ID: <1173841694.932998.290390@d57g2000hsg.googlegroups.com>

> Note that the mask needs to be a bool array.

>>> mask = zeros(5)
>>> mask = zeros(5, numpy.int8)
>>> mask[1] = True
>>> mask[2] = True
>>> a = zeros(5)
>>> a[mask] = [100, 200]
>>> a
array([ 100.,  100.,    0.,    0.,    0.])

I found this strange. It should just give an error if you try to use a
mask array of non booleans. It's working great so far.

Thanks for all the hard work.

VJ



From CRhode at LacusVeris.com  Fri Mar 23 22:58:23 2007
From: CRhode at LacusVeris.com (Chuck Rhode)
Date: Fri, 23 Mar 2007 21:58:23 -0500
Subject: [JOB] Sr. Python Developer, Northern VA
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
	<etul70$l3b$1@news4.zwoll1.ov.home.nl> <87aby59dy1.fsf@pobox.com>
Message-ID: <pan.2007.03.24.02.58.22.896945@LacusVeris.com>

John J. Lee wrote this on Thu, 22 Mar 2007 21:16:13 +0000.  My reply is
below.

> I sympathise but conventional wisdom (which surely has a lot of
> truth in it) is that employers are not faced with the problem of
> minimising false negatives (failing to hire when they should have
> hired).  They are faced with the problem of minimising false
> positives (hiring when they should not have hired).  That's a gross
> simplification of course, but I'm sure you appreciate the point --
> if you're hiring employees, being fairly risk-averse is probably
> quite rational.

... so what's this we hear of employers' (in the US) being so starved
for talent that they're willing to bring in young men from overseas
with 3.5 kids and 1.5 wives?

-- 
.. Chuck Rhode, Sheboygan, WI, USA
.. Weather:  http://LacusVeris.com/WX
.. 44? ? Wind SSE 7 mph ? Sky overcast. Light rain; mist.


From kyosohma at gmail.com  Thu Mar 15 16:32:24 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 15 Mar 2007 13:32:24 -0700
Subject: problem with str()
In-Reply-To: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
Message-ID: <1173990743.998399.82020@b75g2000hsg.googlegroups.com>

On Mar 15, 2:49 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> I can't get the str() method to work in the following code(the last
> line produces an error):
>
> ============
> class test:
>         """class test"""
>         def __init__(self):
>                 """I am init func!"""
>                 self.num = 10
>                 self.num2 = 20
>         def someFunc(self):
>                 """I am someFunc in test!"""
>                 print "hello"
>
> obj = test()
> obj.someFunc()
> names = dir(obj)
> print names
>
> methodList = [str for str in names if callable(getattr(obj, str))]
> print methodList
>
> x = getattr(obj, methodList[0]).__doc__
> print x
> print type(x)
> print str(getattr(obj, methodList[0]).__doc__)
> ===========
>
> Here is the output:
>
> $ python test1.py
> hello
> ['__doc__', '__init__', '__module__', 'num', 'num2', 'someFunc']
> ['__init__', 'someFunc']
> I am init func!
> <type 'str'>
> Traceback (most recent call last):
>   File "test1.py", line 23, in ?
>     print str(getattr(obj, methodList[0]).__doc__)
> TypeError: 'str' object is not callable
>
> This is part of some code in Diving Into Python,Chapter 4.  In case a
> function doesn't have a __doc__ string, and therefore __doc__ returns
> None, the code needs to convert each __doc__ to a string so that the
> result is guaranteed to be a string.

Your string comprehension over wrote the str built-in method, turning
it into a variable. If you just type "str" (without the quotes) into
the interpreter, it'll spit out 'someFunc'. Thus, you cannot use str
as the iterator in your code:

methodList = [str for str in names if callable(getattr(obj, str))]

instead, do something like this:

methodList = [i for i in names if callable(getattr(obj, i))]

Have fun!

Mike



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 23:49:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 01:49:23 -0300
Subject: bisect on a list of lists
References: <1173471342.957772@iceman.esoterica.pt>
	<mailman.4874.1173477506.32031.python-list@python.org>
	<1173486322.393479@iceman.esoterica.pt>
	<mailman.4886.1173492553.32031.python-list@python.org>
	<1173500591.747311@iceman.esoterica.pt>
Message-ID: <op.toyiclqyx6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 10 Mar 2007 01:23:11 -0300, Paulo da Silva  
<psdasilvaX at esotericaX.ptX> escribi?:

> Gabriel Genellina escreveu:
>
>> Just omit the __init__ method, if you don't have anything additional to
>> do. The inherited method will be used instead, as always:
>
>
> Then, if I have something additional, I can do
> 	def __init__(self,l=None):
> 		if l!=None:
> 			list.__init__(self,l)
> 		...

Yes, something like that.

-- 
Gabriel Genellina



From bbxx789_05ss at yahoo.com  Mon Mar 26 12:51:09 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 26 Mar 2007 09:51:09 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <4607a991$0$23165$426a74cc@news.free.fr>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<4607a991$0$23165$426a74cc@news.free.fr>
Message-ID: <1174927869.003534.107350@d57g2000hsg.googlegroups.com>

On Mar 26, 5:08 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Most of Python's object model is documented here:
>
> http://www.python.org/download/releases/2.2.3/descrintro/http://users.rcn.com/python/download/Descriptor.htm
>

Thanks.  I've looked at both of those, and the second one is very
good.



From attn.steven.kuo at gmail.com  Tue Mar 13 14:54:39 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 13 Mar 2007 11:54:39 -0700
Subject: How to capture environment state after running a shell script.
In-Reply-To: <1173790656.886985.65660@v33g2000cwv.googlegroups.com>
References: <1173790656.886985.65660@v33g2000cwv.googlegroups.com>
Message-ID: <1173812079.750152.289300@n33g2000cwc.googlegroups.com>

On Mar 13, 5:57 am, "Gerard Flanagan" <grflana... at yahoo.co.uk> wrote:
> Hello,
>
> I have a third party shell script which updates multiple environment
> values, and I want to investigate (and ultimately capture to python)
> the environment state after the script has run. But running the script
> as a child process only sets values for that process, which are lost
> after execution.  So I thought I could simply tack on an 'env' command
> line to the script input lines as shown below. However, using
> subprocess.Popen gives the error shown (even though the docs say that
> any file object may be used for stdin), and using popen2 hangs
> indefinitely. I think I'm missing something basic, any advice? Or is
> there a better approach?
>

(snipped)

> ########## first method ##########
> p = Popen('/bin/sh', stdin=buf)
> print p.stdout.readlines()
>
> Traceback (most recent call last):
>   File "scratch.py", line 36, in ?
>     p = Popen('/bin/sh', stdin=buf)
>   File "/usr/local/lib/python2.4/subprocess.py", line 534, in __init__
>     (p2cread, p2cwrite,
>   File "/usr/local/lib/python2.4/subprocess.py", line 830, in
> _get_handles
>     p2cread = stdin.fileno()
> AttributeError: StringIO instance has no attribute 'fileno'
>
> ########## second method ##########
> cmdout, cmdin = popen2('/bin/sh')
> for line in buf:
>     cmdin.write(line)
>
> ret = cmdout.readlines()
> cmdout.close()
> cmdin.close()
>
> print ret



First close the input so that the (sub) process
knows to terminate and flush the output.  Then,
you can read from the output:

import subprocess
import popen2

p = subprocess.Popen(["/bin/sh"], stdin=subprocess.PIPE,
        stdout=subprocess.PIPE)

p.stdin.write("env -i FOO=BAR\n")
p.stdin.close()
status = p.wait()
ret = p.stdout.readlines()
p.stdout.close()

print ret

# Or

cmdout, cmdin = popen2.popen2("/bin/sh")
cmdin.write("env -i FOO=BAR\n")
cmdin.close()
ret = cmdout.readlines()
cmdout.close

print ret

--
Hope this helps,
Steven



From __peter__ at web.de  Fri Mar 23 13:31:52 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 Mar 2007 18:31:52 +0100
Subject: fine grain logging cotrol
References: <mailman.5451.1174567188.32031.python-list@python.org>	<etu19j$nqi$03$1@news.t-online.com>	<mailman.5464.1174579174.32031.python-list@python.org>	<etuvoj$pqs$03$1@news.t-online.com>
	<etvvij$7h3$01$1@news.t-online.com>
	<mailman.5519.1174663861.32031.python-list@python.org>
Message-ID: <eu12qc$1n5$00$1@news.t-online.com>

Eric S. Johansson wrote:

> Peter Otten wrote:
>> Eric S. Johansson wrote:
>> 
>> [in private mail -- please don't, Eric]
> 
> sorry.  my preference is for private mail.  it's my way of trying to be
> kind to others by reducing list clutter.

It is not list clutter in my book; it gives others the chance to correct,
add to, or even profit from our conversation.

>> I don't understand. The logging package detects the function name without
>> user intervention.
 
> not in 2.4 afaik.  

Hmm, I must have overread that constraint in your previous posts...

Here is yet another revision of my example then:

import logging
import sys

class LoggedType(type):
    def __new__(mcl, name, bases, classdict):
        def get_logger(self):
            return logging.getLogger("%s.%s" % (name,
sys._getframe(1).f_code.co_name))
        classdict["_%s__logger" % name] = property(get_logger)
        return type.__new__(mcl, name, bases, classdict)

class Logged:
    __metaclass__ = LoggedType

class Felis(Logged):
    def alpha(self):
        self.__logger.info("Felis.alpha")
    def gamma(self):
        self.__logger.info("Felis.gamma")

class Catus(Felis):
    def alpha(self):
        self.__logger.info("Catus.alpha")
    def beta(self):
        self.__logger.info("Catus.beta")

if __name__ == "__main__":
    logging.basicConfig(
        format="EXPECTED %(message)s GOT %(name)s", level=logging.INFO)
    f = Felis()
    f.alpha()
    f.gamma()
    c = Catus()
    c.alpha()
    c.beta()
    c.gamma()

Peter



From sgeiger at ncee.net  Tue Mar 27 12:53:58 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 27 Mar 2007 11:53:58 -0500
Subject: enumerating processes
In-Reply-To: <4608A870.5000302@ncee.net>
References: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>
	<4608A870.5000302@ncee.net>
Message-ID: <46094C26.1090303@ncee.net>


> I believe you are looking for os.getpid()
I apologize for providing that bit of incorrect info. 

It looks to me as if Python 1.5 had os.process which might have done 
what you wanted (although perhaps not in an OS-independent way).  I 
wonder why there isn't an OS-independent way to do that in Python now.

After having seen your message about tomcat.exe, I assume we are talking 
just about Windows.  ;-)  This looks like an excellent way to deal with 
processes on Windows:

# http://tgolden.sc.sabren.com/python/wmi_cookbook.html#running_processes

# List all running processes

import wmi
c = wmi.WMI ()
for process in c.Win32_Process ():
  print process.ProcessId, process.Name


# List all running notepad processes

import wmi
c = wmi.WMI ()
for process in c.Win32_Process (name="notepad.exe"):
  print process.ProcessId, process.Name


# Create and then destroy a new notepad process

import wmi
c = wmi.WMI ()
process_id, return_value = c.Win32_Process.Create 
(CommandLine="notepad.exe")
for process in c.Win32_Process (ProcessId=process_id):
  print process.ProcessId, process.Name

result = process.Terminate ()







>
> ??? wrote:
>> hi ,all
>>    any one knows how to enumerate the current running processes , or 
>> how to obtain a specific process by its name or process id. I know I 
>> can do this in many  programming languages , but how in python? any 
>> one know?
>>  Thanks for any guidance.
>>
>> -- 
>> li xianmin
>>
>>            lixianmin at gmail.com <mailto:lixianmin at gmail.com> 
>

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From gigs at hi.t-com.hr  Fri Mar  9 12:04:12 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 09 Mar 2007 18:04:12 +0100
Subject: tkinter text editor
In-Reply-To: <espfgv$6q7$1@ss408.t-com.hr>
References: <espfgv$6q7$1@ss408.t-com.hr>
Message-ID: <espfmi$7ev$1@ss408.t-com.hr>

Gigs_ wrote:
> I'm writing text editor.
> 
> How to enable/disable (cut, copy etc.) when text is selected/not selected
Btw it is cut copy ... in edit menu


From beliavsky at aol.com  Mon Mar 26 20:36:01 2007
From: beliavsky at aol.com (Beliavsky)
Date: 26 Mar 2007 17:36:01 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174923080.941888.198340@p77g2000hsh.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174918286.213517.100190@l77g2000hsb.googlegroups.com>
	<1174923080.941888.198340@p77g2000hsh.googlegroups.com>
Message-ID: <1174955761.486086.256910@o5g2000hsb.googlegroups.com>

On Mar 26, 10:31 am, "Carl Banks" <pavlovevide... at gmail.com> wrote:

<snip>

> > You can write programs in Python that do usefully complicated things,
> > and you can get them to work in a reasonable time. Fortran can't do
> > this, for anything more than the trivial. "Classic" Fortran tasks of
> > the past are now seen as trivial. OK, so they did it to a lot of data,
> > but they really didn't do anything very complex to it.
>
> You couldn't be more incorrect.  I have run some very old (pre-Fortran
> 77) programs that are very far from trivial.
>
> > You can also write Python that other people can read and maintain. You
> > can't do this in Fortran, without a truly insane amount of trouble.
>
> This is a lie.  I've seen some Fortran code that was hellspawned, and
> some that was clear as glass.  The latter came about without a "truly
> insane amount of trouble".

I quite agree with you. People have written big, mission-critical
programs to run nuclear reactors and design planes in Fortran 66 and
77, although I hoped that they ran static analysis programs such as
FTNCHEK to verify them. Fortran 90 and later versions has modules,
whose use allows the compiler to check types in procedure calls. I
used Fortran 77 in my physics PhD program and find that I am much more
productive in Fortran 95 now, making fewer errors not caught at
compile time. The operations on arrays and array sections in Fortran
90+
help one to write number-crunching code that is "clear as glass".



From a.schmolck at gmail.com  Wed Mar 14 13:06:40 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 14 Mar 2007 17:06:40 +0000
Subject: Python equivalents to MATLAB str2func, func2str, ischar, isfunc?
References: <1173891444.243400.41690@e65g2000hsc.googlegroups.com>
Message-ID: <yfsy7lz7o0v.fsf@oc.ex.ac.uk>

"dmitrey" <openopt at ukr.net> writes:

> I can't find these via web serch
> 
> thank you in advance,
> Dmitrey


str2func: getattr(some_module, 'f')
func2str: f.__name__
ischar: isinstance(x, basestring) and len(x) == 1
isfunc: callable(x) # is most likely to be what you want

'as


From martin at v.loewis.de  Sat Mar 31 14:02:58 2007
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 31 Mar 2007 20:02:58 +0200
Subject: When will 2.5.1 be released?
In-Reply-To: <1173220493.492862.299210@q40g2000cwq.googlegroups.com>
References: <1173037797.127119.248300@h3g2000cwc.googlegroups.com>
	<1173208347.506758.166620@30g2000cwc.googlegroups.com>
	<1173220493.492862.299210@q40g2000cwq.googlegroups.com>
Message-ID: <460EA252.5050804@v.loewis.de>

>> And while we're waiting for 2.5.1, can somebody post a clear (as
>> opposed to the one that comes with Tix ;)) explanation of how to
>> manually install Tix into python 2.5?  It should be possible...
> 
> LLoyd
> -Not possible - this is a known bug and won't be fixed until 2.5.1

This is not true. Copying the tix files into the Python installation
will work just fine.

Regards,
Martin


From grante at visi.com  Wed Mar  7 18:14:24 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 07 Mar 2007 23:14:24 -0000
Subject: Calling a function with unknown arguments?
References: <1173308108.239943.174560@j27g2000cwj.googlegroups.com>
Message-ID: <12uuhqggp71ikad@corp.supernews.com>

On 2007-03-07, Rob <crowell at mit.edu> wrote:
> I can get a list of a function's arguments.
>>>> def bob(a, b):
> ...     return a+b
> ...
>>>> bob.func_code.co_varnames
> ('a', 'b')
>
> Let's say that I also have a dictionary of possible arguments for this
> function.
>>>> possible = {'a':10, 'b':5, 'c':-3}
>
> How do I proceed to call bob(a=10, b=5) with this information?

bob(a=possible['a'],b=possible['b'])

-- 
Grant Edwards                   grante             Yow!  BRILL CREAM is
                                  at               CREAM O' WHEAT in another
                               visi.com            DIMENSION...


From anton.vredegoor at gmail.com  Wed Mar 28 13:12:20 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Wed, 28 Mar 2007 19:12:20 +0200
Subject: Hpw make lists that are easy to sort.
Message-ID: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>

Python's sorting algorithm takes advantage of preexisting order in a 
sequence:

#sort_test.py
import random
import time

def test():
     n = 1000
     k = 2**28

     L = random.sample(xrange(-k,k),n)
     R = random.sample(xrange(-k,k),n)

     t = time.time()
     LR = [(i+j) for i in L for j in R]
     print time.time()-t
     LR.sort()
     print time.time()-t

     print

     t = time.time()
     #L.sort()
     R.sort()
     presorted_LR = [(i+j) for i in L for j in R]
     print time.time()-t
     presorted_LR.sort()
     print time.time()-t

if __name__=='__main__':
     test()

On this -very slow- computer this prints:

 >d:\python25\pythonw -u "sort_test.py"
1.10000014305
8.96000003815

1.10000014305
5.49000000954
 >Exit code: 0

Presorting the second sequence gains us more than three seconds. I 
wonder if there is a way to generate the combined items in such a way 
that sorting them is even faster? Is there some other sorting algorithm 
that can specifically take advantage of this way -or another way- of 
generating this list?

The final sequence is len(L)*len(R) long but it is produced from only 
len(L)+len(R) different items, is it possible to exploit this fact? I'd 
also be interested in a more general solution that would work for 
summing the items of more than two lists in this way.

A.


From carsten at uniqsys.com  Mon Mar 12 11:21:19 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 12 Mar 2007 11:21:19 -0400
Subject: backslashes in lists
In-Reply-To: <BAY126-W6DD4F050FEF6036835FEFD37D0@phx.gbl>
References: <BAY126-W6DD4F050FEF6036835FEFD37D0@phx.gbl>
Message-ID: <1173712879.3463.49.camel@dot.uniqsys.com>

On Mon, 2007-03-12 at 18:08 +0300, Fabio Gomes wrote:
> Yes, Luca.
> 
>   I noticed that printing the list item will show the string as
> expected. But I need to print the entire list in the script I'm
> writing and doing that, the list will will be repr()'ed. Is there any
> way to print the entire list without being parsed by repr()?

It would be easier to help you if you told us what you are actually
trying to achieve. What does printing the entire list give you that
printing its individual items does not?

-Carsten




From gagsl-py2 at yahoo.com.ar  Fri Mar  9 20:22:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 22:22:14 -0300
Subject: Are Lists thread safe?
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
	<1173469137.897102.298120@p10g2000cwp.googlegroups.com>
	<1173469517.797876.262330@t69g2000cwt.googlegroups.com>
	<1173469804.756713.41700@q40g2000cwq.googlegroups.com>
Message-ID: <op.tox8rcxwx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 16:50:04 -0300, abcd <codecraig at gmail.com> escribi?:

> I guess this might be overkill then...

That depends on your target. For the *current* CPython implementation,  
yes, because it has an internal lock. But other versions (like Jython or  
IronPython) may not behave that way.

> class MyList(list):
>     def __init__(self):
>         self.l = threading.Lock()

Better to use an RLock, and another name instead of l:
	self.lock = threading.RLock()
(A method may call another, and a Lock() won't allow that)

>     def append(self, val):
>         try:
>             self.l.acquire()
>             list.append(self, val)
>         finally:
>             if self.l.locked():
>                 self.l.release()

I'd write it as:

      def append(self, val):
          self.lock.acquire()
          try:
              list.append(self, val)
          finally:
              self.lock.release()
	
> ....performing the same locking/unlocking for the other methods (i.e.
> remove, extend, etc).

Note that even if you wrap *all* methods, operations like mylist += other  
are still unsafe.

py> def f(self): self.mylist += other
...
py> import dis; dis.dis(f)
   1           0 LOAD_FAST                0 (self)
               3 DUP_TOP
               4 LOAD_ATTR                0 (mylist)
               7 LOAD_GLOBAL              1 (other)
              10 INPLACE_ADD
              11 ROT_TWO
              12 STORE_ATTR               0 (mylist)
              15 LOAD_CONST               0 (None)
              18 RETURN_VALUE

INPLACE_ADD would call MyList.__iadd__ which you have wrapped. But you  
have a race condition between that moment and the following STORE_ATTR, a  
context switch may happen in the middle.

It may not be possible to create an absolutely thread-safe list without  
some help on the client side. (Comments, someone?)

-- 
Gabriel Genellina



From troy.melhase at gmail.com  Sat Mar 17 16:08:04 2007
From: troy.melhase at gmail.com (Troy Melhase)
Date: Sat, 17 Mar 2007 12:08:04 -0800
Subject: Pickle and Instance Methods
In-Reply-To: <1174160685.098122.29780@l77g2000hsb.googlegroups.com>
References: <1174160685.098122.29780@l77g2000hsb.googlegroups.com>
Message-ID: <d50f6c8a0703171308v101cb196t97b52d6e5b17c5af@mail.gmail.com>

> I understand that this cannot be saved by pickle.
> My question is, is there another way of setting a callback that would
> agree with pickle?
> If not is there some way to make pickle ignore the problem attribute?

Try adding a __getstate__ method to your class:

http://docs.python.org/lib/pickle-inst.html


From deets at nospam.web.de  Sun Mar 11 06:18:37 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 11 Mar 2007 11:18:37 +0100
Subject: Python in a desktop environment
In-Reply-To: <1173605193.585675.217210@30g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
Message-ID: <55i3btF251if5U1@mid.uni-berlin.de>

David Cramer schrieb:
> On Mar 10, 10:52 pm, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com>
> wrote:
>> David Cramer wrote:
>>> If you had an application that you were about to begin development on
>>> which you wanted to be cross platform (at least Mac and Windows),
>>> would you suggest using c++ and Python?
>> I'd strongly consider a pure python solution (I'd choose wxpython),
>> but if I needed to code backend stuff in a lower level language I'd
>> use C rather than C++.
> 
> Well we want it to be very robust, and python isn't exactly the
> fastest language, or one with the lowest overhead :)

Erm, and what has _robustness_ with fast & less overhead to do? It's 
exactly the other way round, a python program is much less likely to 
crash that C/C++, and if so in manners that are much easier to manage 
and fix.

I've done extensive GUI-development with PyQt, and can say that it's a 
very productive and powerful combination. And GUI-code usually isn't 
troublesome performance-wise.

Diez


From rune.strand at gmail.com  Sat Mar 10 16:24:34 2007
From: rune.strand at gmail.com (Rune Strand)
Date: 10 Mar 2007 13:24:34 -0800
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
Message-ID: <1173561873.899180.321480@s48g2000cws.googlegroups.com>

Yes, you have name.has_key(name_key) and perhaps better, the in
operator:

if name_key in name:
   do something




From http  Thu Mar  8 21:30:58 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 18:30:58 -0800
Subject: any better code to initalize a list of lists?
References: <esqc9r$cn09$1@netnews.upenn.edu>
	<7xlki7dx5m.fsf@ruckus.brouhaha.com>
	<esqfea$cne0$1@netnews.upenn.edu>
Message-ID: <7xps7j6tct.fsf@ruckus.brouhaha.com>

"John" <rds1226 at sh163.net> writes:
> I want to radix sort non-negative integers that can fit into 32-bits.

But why do you want to do that?  Why not just use Python's built-in
sorting operation?


From sgeiger at ncee.net  Tue Mar 20 01:51:02 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 20 Mar 2007 00:51:02 -0500
Subject: using regexp
In-Reply-To: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>
References: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>
Message-ID: <45FF7646.5030801@ncee.net>

You don't even need regex.

def 
split_seq(seq,size):                                                                                                               

    # this is sort of the inverse of 
flatten                                                                                           

    # Source: 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/425044                                                           

    return [seq[i:i+size] for i in range(0, len(seq), 
size)]                                                                           

                                                                                                                                       

line = 
'123456789123456789'                                                                                                            

                                                                                                                                       

print 
split_seq(line,3)                                                                                                                



Will that work for you?



s99999999s2003 at yahoo.com wrote:
> hi
> how can i use regexp to group these digits into groups of 3?
>
> eg
> line 123456789123456789
>
> i have :
>
> pat = re.compile("line\s+(\d{3})" , re.M|re.DOTALL)
>
> but this only gives the first 3. I also tried
>
> "line\s+(\d{3})+"
> but also not working.
> I need output to be ['123' ,'456','789', '123','456','789', .....]
> thanks.
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From brad at allendev.com  Sat Mar 10 12:54:00 2007
From: brad at allendev.com (Brad Allen)
Date: Sat, 10 Mar 2007 11:54:00 -0600
Subject: [python-advocacy] A Pythonic Way to Measure and Improve Your 
	Programming Skills?
In-Reply-To: <1173546636.14230.57.camel@workshop>
References: <45F14D7E.3060707@taupro.com>	
	<a06230908c2187f182731@[192.168.1.242]>
	<1173546636.14230.57.camel@workshop>
Message-ID: <a0623090cc2189ef69f28@[192.168.1.242]>

At 9:10 AM -0800 3/10/07, Michael Bernstein wrote:
>On Sat, 2007-03-10 at 10:01 -0600, Brad Allen wrote:
>
>>  When I discussed this problem with Michael Bernstein at PyCon he suggested
>>  the idea of creating a "chroot jail" for each web session which could run
>>  the Python interpreter in a secure sandbox. That might be easier than giving
>>  each session a whole virtual server.
>
>Note that this wasn't an original idea of mine, I got it from brief
>mentions associated with two existing interactive python-in-a-web-page
>implementations:
>
>         Try Python: http://www.mired.org/home/mwm/try_python/
>
>         TryPy: http://trac.pocoo.org/wiki/TryPy
>

Cool! The first link appears to work with Firefox and provides a real example
of using a Python interactive prompt via a non-local web interface.
Interestingly, it doesn't seem to use Crunchy, but instead uses TryPy.

Apparently you can't define classes or functions with TryPy, but I recall you
can using Crunchy. This is important for creating tutorials in which you
ask the student to define a class or function to solve a problem.


From half.italian at gmail.com  Thu Mar 15 08:01:07 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 15 Mar 2007 05:01:07 -0700
Subject: Circular Class Logic
In-Reply-To: <mailman.5124.1173937103.32031.python-list@python.org>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
Message-ID: <1173960067.782597.96840@e1g2000hsg.googlegroups.com>

> Remove the line above
> and add this below:
> def initFoo():
>   import baz
>   Foo.baz = baz.Baz()
> initFoo()

I got it to work, but I had to add a check to see if the class
variable had been set..

def initBaz():
  import Baz
  Foo.baz = Baz.Baz()

class Foo:
  baz = None
  def __init__(self):
    if Foo.baz == None:
      Foo.baz = True
      initBaz()

What exactly is being accomplished by having the init function outside
of the class?  If there is no check, wouldn't it just execute every
time an object is instantiated anyway?

> Instead of initFoo, you could use a custom metaclass. Or a class decorator (if
> and when they become available...)

I haven't tried either of those yet.  The names scare me. :)  Sounds
like this might be a good time to explore them.

> The code above is an effective way of doing what you want. But I'd think about
> the actual need of doing such things - are you sure it's a good design?
>

I thought it was a good design, but now I'm not so sure.  I'm
untrained, so often I dont know the right way to do things.  As I
build this into the libraries, I'll keep an eye on how the code is
developing and go from there.    Thanks for the help!

~Sean



From skip at pobox.com  Fri Mar 30 16:49:10 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 30 Mar 2007 15:49:10 -0500
Subject: [Pythonmac-SIG] MacPython wiki "moved" to Python wiki - now it's
	your turn...
In-Reply-To: <460D76F8.4050601@codebykevin.com>
References: <17873.15892.286360.853505@montanaro.dyndns.org>
	<460D76F8.4050601@codebykevin.com>
Message-ID: <17933.30662.861059.441920@montanaro.dyndns.org>


    Kevin> I was just looking at the new MacPython pages at the Python
    Kevin> wiki--it appears nothing has been done with them since Skip moved
    Kevin> them over. I'm thinking this is a terrific opportunity to bring
    Kevin> them up to date: would anyone mind if I got started?  A lot of
    Kevin> this stuff doesn't appear to have been touched for three or four
    Kevin> years.

I say go for it.  You are correct in presuming the functional content has not
been improved.  The spammers have rediscovered it at its new home and
continue to play their silly games, but there are a group of us committed to
keeping the Python wiki cleaned up in that respect.

Skip


From jjl at pobox.com  Thu Mar 22 17:16:13 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 22 Mar 2007 21:16:13 GMT
Subject: [JOB] Sr. Python Developer, Northern VA
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
	<etul70$l3b$1@news4.zwoll1.ov.home.nl>
Message-ID: <87aby59dy1.fsf@pobox.com>

> > Michael Bentley wrote:
>
> > Perhaps it is different where you live, but here you can put on your
> > resume relevant things that aren't paying jobs.  Otherwise nobody
> > would ever get their first job, right?
>
> Sure you can. But around here if one has been unemployed for a while
> it's nearly impossible to get hired ever again. It doesn't matter how
> many years programming Python one puts on the resume. Unpaid
> activities are just not *visible*. So HRM people keep asking questions
> like 'But what have you been doing?' In the end I just started my own
> company, and while I'm not always employed as a freelancer I can at
> least now say I'm running my own business.

You may not realise it if you haven't been applying for work since you
did that, but I'm sure you've done a lot for your "employability" (I
hate that word, it implies that it's a one-sided business, clearly
false) by working as a freelancer.

Your original rant seemed rather one-sided, though.


> The basic problem however is that it's just not anyones business
> whether one has been walking through the country making pictures or
> doing some desk job. All that should matter is can he do the job and
> is he motivated. Asking a person who he *is* (resume) is not Pythonic!

I sympathise but conventional wisdom (which surely has a lot of truth
in it) is that employers are not faced with the problem of minimising
false negatives (failing to hire when they should have hired).  They
are faced with the problem of minimising false positives (hiring when
they should not have hired).  That's a gross simplification of course,
but I'm sure you appreciate the point -- if you're hiring employees,
being fairly risk-averse is probably quite rational.

I've often thought that randomness is a good thing here though,
globally -- a world of perfectly rational selfish employers would fail
to employ legions of highly productive people.  Luckily incompetence
in hiring steps in often enough to save the day, in this best of all
possible worlds <0.75 wink>

(no hiring incompetence at the employer I'm just about to move to, it
goes without saying :-)


John


From john.pye at gmail.com  Wed Mar 21 01:48:47 2007
From: john.pye at gmail.com (John Pye)
Date: 20 Mar 2007 22:48:47 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <etqecu$kl5$1@rumours.uwaterloo.ca>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<etqecu$kl5$1@rumours.uwaterloo.ca>
Message-ID: <1174456127.741403.198150@e65g2000hsc.googlegroups.com>

On Mar 21, 4:04 pm, Ross Ridge <rri... at caffeine.csclub.uwaterloo.ca>
wrote:
> Gabriel Genellina <gagsl-... at yahoo.com.ar> wrote:
> >You can get the file descriptor from the Python file object using its
> >fileno() method. The file descriptor lives at the OS level, so it's safe
> >to pass around.
>
> Not under Windows.  Windows doesn't have Unix-like descriptors, so the
> C runtime emulates them.

I am trying the following... any thoughts?


%typemap(in) FILE * {
    if (!PyFile_Check($input)) {
        PyErr_SetString(PyExc_TypeError, "Need a file!");
        return NULL;
    }
%#ifdef __MINGW32__
	PyFileObject *fo = (PyFileObject *)$input;
	$1 = fdopen(_fileno(fo->f_fp),PyString_AsString(fo->f_mode));
	fprintf(stderr,"FDOPEN(%d,\"%s\")\n",fo->f_fp,PyString_AsString(fo-
>f_mode));
%#else
    $1 = PyFile_AsFile($input);
%#endif
}





From _karlo_ at _mosor.net_  Tue Mar 20 09:08:58 2007
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Tue, 20 Mar 2007 13:08:58 +0000 (UTC)
Subject: How to copy a ClassObject?
Message-ID: <Xns98F98FEF2B9A6mosornet@161.53.160.64>

Hi all,

how would one make a copy of a class object? Let's say I have:
  class First:
    name = 'First'

And then I write:
  tmp = First

then 'tmp' becomes just a reference to First, so if I write 
tmp.name = "Tmp", there goes my First.name. So, how to make 'tmp' a copy 
of First, I tried using copy.copy and copy.deepcopy, but that doesn't 
work.

P.S.
Yes, I can do a:
  class tmp(First):
      pass

but I'd rather make a copy than a subclass.

Thanks.

-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From sergio.correia at gmail.com  Tue Mar  6 14:40:37 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Tue, 6 Mar 2007 14:40:37 -0500
Subject: Getting external IP address
In-Reply-To: <1173206863_18689@sp6iad.superfeed.net>
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
	<1173206863_18689@sp6iad.superfeed.net>
Message-ID: <f1aa6d810703061140m27b5f169gc3dab7b24ffe53c1@mail.gmail.com>

The above suggestions seem nice, but I find this one easier:

import urllib2
ext_ip = urllib2.urlopen('http://whatismyip.org/').read()
print ext_ip

The nice thing about the above code is that http://whatismyip.org/
only contains exactly what you want (the ip, nothing more, nothing
less), so no parsing is necessary

Best,
Sergio

On 3/6/07, Cousin Stanley <cousinstanley at hotmail.com> wrote:
>
> > I have a PC behind a firewall, and I'm trying to programmatically
> > determine the IP address visible from outside the firewall.
> > ....
>
> Steven ....
>
>   Following is another alternative that might at least
>   be worth consideration ....
>
>   I use the  lynx  command shown as a command-line alias
>   under Debian linux ....
>
> >>>
> >>> import os
> >>>
> >>> pipe_in = os.popen( 'lynx --dump http://checkip.dyndns.org' )
> >>>
> >>> ip_addr = pipe_in.readlines()
> >>>
> >>> for this in ip_addr :
> ...     print this
> ...
>
>
>    Current IP Address: 65.39.92.38
>
>
> --
> Stanley C. Kitching
> Human Being
> Phoenix, Arizona
>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
> http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
> ----= East and West-Coast Server Farms - Total Privacy via Encryption =----
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From gagsl-py2 at yahoo.com.ar  Tue Mar 27 14:22:02 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 Mar 2007 15:22:02 -0300
Subject: How can I catch all exception in python?
References: <1175018958.602131.145190@y80g2000hsf.googlegroups.com>
Message-ID: <op.tpu1a0bix6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 Mar 2007 15:09:18 -0300, yinglcs at gmail.com <yinglcs at gmail.com>  
escribi?:

> I read the document here about exception handling in python:
>
> http://www.diveintopython.org/file_handling/index.html
>
> Can you please tell me how can I catch all exception in python?
> like this in Java:
> try {
>  ....
> } catch (Throwable t) {
>  ...
> }

See the Further Reading section on that same page.
Exceptions are covered in the Python Tutorial here:  
http://docs.python.org/tut/node10.html

-- 
Gabriel Genellina



From paolopantaleo at gmail.com  Tue Mar  6 11:01:58 2007
From: paolopantaleo at gmail.com (PAolo)
Date: 6 Mar 2007 08:01:58 -0800
Subject: Wrong exist status for os.system, os.poepen, etc.
In-Reply-To: <1173196282.319123.230430@p10g2000cwp.googlegroups.com>
References: <mailman.4719.1173195592.32031.python-list@python.org>
	<1173196282.319123.230430@p10g2000cwp.googlegroups.com>
Message-ID: <1173196918.161093.292930@30g2000cwc.googlegroups.com>

On 6 Mar, 16:51, "Paul Boddie" <p... at boddie.org.uk> wrote:
> On 6 Mar, 16:39, "Paolo Pantaleo" <paolopanta... at gmail.com> wrote:
>
>
>
> > The os.system() (but all the other funciont with similar behavior) reports
> > wrong exit status. I can reproduce the bug in the following way
>
> I think you should look at some previous threads related to this
> (obtained by searching Google Groups for "os.system exit status
> code"):
>
> "grabbing return codes from os.system() call"http://groups.google.com/group/comp.lang.python/browse_frm/thread/efe...
>
> "please help me understand os.system() result"http://groups.google.com/group/comp.lang.python/browse_frm/thread/4a9...
>
> "os.system() << 8 ?"http://groups.google.com/group/comp.lang.python/browse_frm/thread/f12...
>
> In short, the returned code is actually a combination of two values,
> and you need to extract the expected status code by shifting the
> result 8 bits to the right. It may actually be more complicated than
> that, but the man page for system ("man 3 system") explains this in
> more detail.
>
> Paul

Sorry, for the mistake, I just missed the words "encoded in the format
specified for wait()" in the documentation of popen()

Thnx for the immediate answer
PAolo



From randomtalk at gmail.com  Fri Mar 16 13:42:49 2007
From: randomtalk at gmail.com (randomtalk at gmail.com)
Date: 16 Mar 2007 10:42:49 -0700
Subject: TypeError: 'module' object is not callable
Message-ID: <1174066969.563803.216040@p15g2000hsd.googlegroups.com>

Hello everyone!
i have the following test code:
class temp:
    def __init__(self):
        self.hello = "hello world!"
    def printworld(self):
        print(self.hello)
t = temp()

and i tried to call profile('t.printworld()')

but i received the following error:
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: 'module' object is not callable

I'm not sure what is wrong exactly, if anyone can point me to the
right direction, it would be much appreciated!



From steven.bethard at gmail.com  Wed Mar 21 13:50:07 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Wed, 21 Mar 2007 11:50:07 -0600
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <2_SdnSgt_r_N7ZzbnZ2dnUVZ_s-rnZ2d@comcast.com>

dmitrey wrote:
> I looked to the PEPs & didn't find a proposition to remove brackets &
> commas for to make Python func call syntax caml- or tcl- like: instead
> of
> result = myfun(param1, myfun2(param5, param8), param3)
> just make possible using
> result =  myfun param1 (myfun2 param5 param8) param3

You should really post this somewhere that Guido will see it so he can 
add it to PEP 3099: "Things that will Not Change in Python 3000". 
Really, there's no way this is going to fly, so you might as well drop 
it or write your own language.

STeVe

P.S. If you use IPython, I believe you can get some of this.


From zzhao at laika.com  Tue Mar 13 21:02:23 2007
From: zzhao at laika.com (ZiZi Zhao)
Date: Tue, 13 Mar 2007 18:02:23 -0700
Subject: list of dictionary in embedded Python
References: <ACCA22ED08500745AE88FEDED5B6F2EA02BC0B4F@exchange.wvs>
	<op.towjcjt7x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <ACCA22ED08500745AE88FEDED5B6F2EA02BC0B68@exchange.wvs>

You are right! I added 
Py_INCREF(pDict);
right behind 
pDict = PyDict_New();

it seems to work correctly.

thanks,

zz

-----Original Message-----
From: python-list-bounces+zzhao=laika.com at python.org on behalf of Gabriel Genellina
Sent: Thu 3/8/2007 7:15 PM
To: python-list at python.org
Subject: Re: list of dictionary in embedded Python
 
En Thu, 08 Mar 2007 22:26:59 -0300, ZiZi Zhao <zzhao at laika.com> escribi?:

> I tried to build a list of dictionaries using embedded Python2.5
> in the following way to append dictionaries to a list.
>
> Py_Object *pList = PyList_New(0);
>
> for (i=0; i<MAXSIZE; i++) {
>     Py_Object *pDict = PyDict_New();
>     //
>     // build this dictionary of keys & values
>     //
>     if (pDict != NULL) {
>         if (PyList_Append(pList, pDict) < 0) {
>             printf ("Failed to append new dict to dict-list\n");
>         }
>         Py_DECREF(pDict);
>     }
> }
>
> In this way, I found the PyList_Append only appends the pointer
> of pDict to pList.

All Python objects are seen as pointers on C code.

> After Py_DECREF(pDict) and going back to,
> Py_Object *pDict = PyDict_New();
> for next run in loop, it gets the same pointer as last time,

Perhaps (in the non-posted block) there is a Py_INCREF missing, and that  
last Py_DECREF destroys the object.
(You don't see the printf message, I presume)

> which finally makes all dictionaries in the list are the same
> as the last one. (BTW, in Python, the result is correct.)
> Now, I have to do no Py_DECREF(pDict) in the loop, but do once at
> the end, when the loop is finished, like

You could check using sys.getrefcount; if all of them say 2 (including the  
last dict) you know the list holds the only reference to them. (And all  
id() should be different, too).

Maybe this code is useful; builds a list of empty dictionaries. (Note that  
I *know* the list is empty and has the right size, so I can use  
PyList_SET_ITEM instead of the non-macro version PyList_SetItem or the  
insert/append variants).


/*
  flistdict - fast list of dictionaries
  flistdict(size) -> [{},{},...] = [{} for _ in range(size)]
  Devuelve una lista de diccionarios vac?os (todos diferentes)
*/
static PyObject *
flistdict(PyObject *self, PyObject *args)
{
     int i, size;
     PyObject *result=NULL, *dict=NULL;

     if (!PyArg_ParseTuple(args, "i", &size))
         return NULL;
     result = PyList_New(size);
     if (result==NULL)
         goto error;
     for (i=0; i<size; i++) {
         dict = PyDict_New();
         if (dict==NULL)
              goto error;
         PyList_SET_ITEM(result, i, dict);
     }
     goto normalexit;

error:
     Py_XDECREF(result);
     result = NULL;

normalexit:
     return result;
}

-- 
Gabriel Genellina

-- 
http://mail.python.org/mailman/listinfo/python-list

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From gagsl-py2 at yahoo.com.ar  Tue Mar 13 03:18:00 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 04:18:00 -0300
Subject: Calling cpp from python/SWIG
References: <1173767623.632550.148000@64g2000cwx.googlegroups.com>
Message-ID: <op.to388ag9x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 03:33:43 -0300, Frank <supervau at gmail.com> escribi?:

> I want to parse an array M1 from python to a cpp function fct which
> returns an array M2.
>
> How can I do this best? Is SWIG appropriate or is there something
> else?

If you're going to call a single function, declare it with extern "C" (or  
write a wrapper function) and use ctypes from Python.
Try to keep the memory allocation in Python: instead of returning another  
array, make the function use the *same* input array, or give it -from  
Python- a previously allocated array.
ctypes comes with Python 2.5, and you can download and install it for  
previous versions too.

-- 
Gabriel Genellina



From lobais at gmail.com  Mon Mar 26 02:30:16 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Mon, 26 Mar 2007 08:30:16 +0200
Subject: Sending ECHO_REQUEST (pinging) with python
Message-ID: <pan.2007.03.26.06.30.33@gmail.com>

Hi, I've writing a python application in which I'd like to have a small 
"ping label", to always tell the current ping time to the server.

It seems however that I have to be root to send those imcp packages, but 
I guess there must be a workaround since I can easily use the "ping" 
command as ordinary user.

Do anybody know how to do this in python?


From sbassi at clubdelarazon.org  Sun Mar 18 01:08:51 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Sun, 18 Mar 2007 02:08:51 -0300
Subject: How to parse the os.system() output in python
In-Reply-To: <etifo0$vj7$1@news.yaako.com>
References: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>
	<mailman.5237.1174189740.32031.python-list@python.org>
	<etifo0$vj7$1@news.yaako.com>
Message-ID: <9e2f512b0703172208x475b323cy91f7f9605c69031@mail.gmail.com>

On 3/18/07, bruce peng <pengning at kingsoft.net> wrote:
> how to redirect the putput of the
> program to a file?

like this:
program_name -parameters > outfile.txt


From irstas at gmail.com  Mon Mar 26 10:15:22 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 26 Mar 2007 07:15:22 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174916838.757839.143310@e65g2000hsc.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
Message-ID: <1174918522.211602.260290@l75g2000hse.googlegroups.com>

On Mar 26, 4:47 pm, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
> > You can get the speed of fortran in Python by using libraries like
> > Numeric without losing the readability of Python.
>
> Can you back this up with some source??
> Chris

If you execute one command in Python which tells a super-optimized
Fortran-routine to do lots of work, the overhead of Python will be
neglible. That's all there is to it, no need for a source.



From tgrav at mac.com  Mon Mar  5 11:15:15 2007
From: tgrav at mac.com (Tommy Grav)
Date: Mon, 5 Mar 2007 11:15:15 -0500
Subject: Newbie question
Message-ID: <01B89435-9EFC-4CBE-8EA2-C4BFE842345D@mac.com>

Hi list,

    this is somewhat of a newbie question that has irritated me for a  
while.
I have a file test.txt:

0.3434  0.5322 0.3345
1.3435  2.3345 5.3433

and this script
lines = open("test.txt","r").readlines()
for line in lines:
    (xin,yin,zin) = line.split()
    x = float(xin)
    y = float(yin)
    z = float(zin)

Is there a way to go from line.split() to x,y,z as floats without  
converting
each variable individually?

Cheers
    Tommy


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 23:47:30 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 01:47:30 -0300
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
	<slrnev2q3q.cis.mandus@oro.simula.no> <d2fIh.4$iC.1@newsfe22.lga>
	<mailman.4872.1173474874.32031.python-list@python.org>
	<2iqIh.2485$_R.1335@newsfe23.lga>
Message-ID: <op.toyh9gb6x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 18:16:43 -0300, hg <hg at nospam.org> escribi?:

> I'm not very familiar with the technology as I just have had to modify an
> extension here and there.
>
> I guess my question is off topic as a C++ dll / shared lib is not my main
> target but rather C: I need to integrate a printer driver and and would
> like if possible to avoid all of the .h stuff involved with SWIG (I am  
> not
> being sarcastic): if I can setup my prototypes directly in python, why go
> through an extra layer ?
>
> Aren't ctypes better suited to such an application ?

Sure, if you have a C (not C++) DLL, using ctypes should be OK.

-- 
Gabriel Genellina



From steve at holdenweb.com  Mon Mar 19 17:01:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 17:01:37 -0400
Subject: Load three different modules which have the same name
In-Reply-To: <1174329764.310542.298430@b75g2000hsg.googlegroups.com>
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
Message-ID: <etmtq7$db2$1@sea.gmane.org>

abcd wrote:
> nevermind this took care of it:
> 
> import sys
> 
> def tryAllThree():
>     a = "c:\\alpha"
>     b = "c:\\beta"
>     g = "c:\\gamma"
> 
>     sys.path.append(a)
>     import Person
>     alpha = Person.Person()
> 
>     sys.path.remove(a)
>     sys.path.append(b)
>     reload(Person)
>     beta = Person.Person()
> 
>     sys.path.remove(b)
>     sys.path.append(g)
>     reload(Person)
>     gamma = Person.Person()
> 
> thanks
> 
Blerch! Why not just call the modules by the right names in the first 
place? Then each will have its own sys.modules entry for a start ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From arkanes at gmail.com  Tue Mar  6 11:56:42 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 10:56:42 -0600
Subject: Project organization and import
In-Reply-To: <1173199320.094675.58350@p10g2000cwp.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
	<1173199320.094675.58350@p10g2000cwp.googlegroups.com>
Message-ID: <4866bea60703060856x29d756f5o30708019fdc7b644@mail.gmail.com>

On 6 Mar 2007 08:42:00 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 5, 2:18 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> > Martin Unsal a ?crit :
> > > For example, say
> > > you want to organize the widgets package as follows:
> >
> > > widgets/scrollbar/*.py
> > > widgets/form/*.py
> > > widgets/common/util.py
> >
> > > Other than messing around with PYTHONPATH, which is horrible, I don't
> > > see how to import util.py from the widget code.
> >
> > Some of us still manage to do so without messing with PYTHONPATH.
>
> How exactly do you manage it?
>
> The only way I can see to do it is to have widgets/__init__.py look
> something like this:
>
> from common import util
> from scrollbar import Scrollbar
> from form import Form
>
> Then Scrollbar.py doesn't have to worry about importing util, it just
> assumes that util is already present in its namespace.
>
> BUT ... this means that Scrollbar.py can only be loaded in the
> interpreter as part of package "widgets". You can't run an interpreter
> and type "import widgets.scrollbar.Scrollbar" and start going to town,
> because Scrollbar doesn't import its own dependencies.
>
> So what I want to clarify here: Do Python programmers try to design
> packages so that each file in the package can be individually loaded
> into the interpreter and will automatically import its own
> dependencies? Or do you design packages so they can only be used by
> importing from the top level and running the top level __init__.py?
>
> I hope that made sense. :)
>

Scrollbar *can't* assume that util will be present in its namespace,
because it won't be unless it imports it. Scrollbar needs to import
its own dependencies. But why do you think thats a problem?

> Martin
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From AWasilenko at gmail.com  Sun Mar 18 20:08:32 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 18 Mar 2007 17:08:32 -0700
Subject: Trying to print from inside a method
In-Reply-To: <1hv6is1.icavxo1xmrwhpN%aleax@mac.com>
References: <1174256116.872955.180040@l77g2000hsb.googlegroups.com>
	<1hv6is1.icavxo1xmrwhpN%aleax@mac.com>
Message-ID: <1174262912.218027.53780@l75g2000hse.googlegroups.com>

On Mar 18, 7:32 pm, a... at mac.com (Alex Martelli) wrote:
> Here, the message1 and message2 names are LOCAL variables of the
> respective methods: each disappear as soon as its method ends.
>
> If you want to make them into INSTANCE attributes, so they'll stick
> around for later, assign to self.message1 and self.message2 instead (and
> of course use these composite names too if need be).

Ah ha, the nugget of info I was forgetting!  Looking back now I can
see why the
author used the self.whatever, and why my code is not working.  When
I'm reading along
all his code looks find and dandy, makes perfect sense; but soon as I
try to do
something on my own quickly find that my understanding of how things
work is very
porous :)

> This would be pretty weird, but legal Python.
> Weirder and weirder, but still legal Python.

This is usually how most of my code turns out :(  I'm afraid if I ever
learn enough
to make a serious program I will be burned at the stake for such un-
pythonic practices :P



From godzillaismad at gmail.com  Fri Mar 23 20:47:11 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 23 Mar 2007 17:47:11 -0700
Subject: Create new processes over telnet in XP
In-Reply-To: <1174658259.620897.171480@o5g2000hsb.googlegroups.com>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
	<1174658259.620897.171480@o5g2000hsb.googlegroups.com>
Message-ID: <1174697231.075546.317470@l75g2000hse.googlegroups.com>

On Mar 24, 12:57 am, "Rob Wolfe" <r... at smsnet.pl> wrote:
> Godzilla wrote:
> > Hello,
>
> > How do you create/spawn new processes in XP over telnet using python?
> > I.e. I would like to create a new process and have it running in the
> > background... when I terminate the telnet connection, I would what the
> > spawned processes to keep running until I shut it off...
>
> > I got the os.popen method to spawn a new process running in the
> > backgroun, but not over telnet... tried os.popen[2, 3, 4] and also
> > subprocesses.popen without any luck...
>
> I don't know what kind of OS there is on that remote host you telnet
> to.
> The idea boils down to appropriate using of methods
> `read_until` and `write` from class `telnetlib.Telnet`.
>
> For more complicated stuff you can consider using pyexpect.
>
> Here is a small example of connecting to HP-UX.
> You can adjust that to your needs.
>
> <code>
> import telnetlib, time
>
> def login(tn, login, passwd, prompt):
>     tn.read_until("login: ")
>     tn.write(login + "\n")
>     if passwd:
>         tn.read_until("Password: ")
>         tn.write(passwd + "\n")
>     tn.read_until(prompt)
>     time.sleep(2)
>     print "logged in"
>
> def run_proc(tn, progname):
>     tn.write("nohup %s &\n" % progname)
>     tn.write("exit\n")
>     print "program <%s> running" % progname
>
> def kill_proc(tn, login, prompt, progname):
>     tn.write("ps -u %s\n" % login)
>     buf = tn.read_until(prompt)
>     pid = get_pid(buf, progname)
>     if not pid:
>         print "program <%s> not killed" % progname
>         tn.write("exit\n")
>         return
>     tn.write("kill -TERM %s\n" % pid)
>     tn.write("exit\n")
>     print "program <%s> killed" % progname
>
> def get_pid(buf, progname):
>     pid, comm = None, None
>     for line in buf.split("\n"):
>         try:
>             pid, _, _, comm = line.split()
>         except ValueError:
>             continue
>         if comm == progname:
>             return pid
>
> tn = telnetlib.Telnet(HOST, PORT)
> #tn.set_debuglevel(1)
> login(tn, "login", "passwd", "/home/user")
> run_proc(tn, "python ~/test.py")
> #kill_proc(tn, "login", "/home/user", "python")
> </code>
>
> --
> HTH,
> Rob

Rob, I would be logging into another XP machine to do some software
installation... the code you provided, correct me if I'm wrong, seems
to work under Unix/Linux. Any idea how to do the equivalent in XP?



From jjl at pobox.com  Wed Mar 21 20:30:23 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 22 Mar 2007 00:30:23 GMT
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<871wjiuz5q.fsf@pobox.com>
	<1174508599.250404.176510@y66g2000hsf.googlegroups.com>
Message-ID: <87slbyt908.fsf@pobox.com>

"Paddy" <paddy3118 at googlemail.com> writes:

> On Mar 21, 8:20 pm, j... at pobox.com (John J. Lee) wrote:
> > "Paddy" <paddy3... at googlemail.com> writes:
> > > I just had a link to Tim peters first post on doctest:
> > >http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> > > removed fromhttp://en.wikipedia.org/wiki/Doctestas it doesn't fit
> > > their guidelines for external links.
> > > I wonder, could maybe the official website be persuaded to host a copy
> > > so that it could be linked to?
> >
> > > Tim, would you object?
> >
> > It (wikipedia) is a wiki, why not edit the page and paste it in?
> >
> > John
> 
> They have rules, and periodically trawl pages and clean them. I'd like
> to stay within the rules.

Which rule would pasting in the post break?

You've explained that *linking* to a non-permanent URL would break the
rules.  You haven't explained why *pasting in* the text of the post
would break the rules (I don't say it wouldn't break them, I'm just
curious).


John


From sigzero at gmail.com  Sun Mar 25 15:03:03 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 25 Mar 2007 12:03:03 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174820918.565521.44750@p15g2000hsd.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<1174820918.565521.44750@p15g2000hsd.googlegroups.com>
Message-ID: <1174849383.513515.216000@n76g2000hsh.googlegroups.com>

On Mar 25, 7:08 am, "has" <has.te... at virgin.net> wrote:
> On 24 Mar, 18:30, "Robert Hicks" <sigz... at gmail.com> wrote:
>
> > I want to upgrade to 2.5 but I don't see any unistall instructions
> > anywhere.
>
> To repeat what others have said: don't uninstall existing
> Python.framework builds. Frameworks support multiple versions quite
> happily, and removing them is more hassle than it's worth. Just
> install the official framework build from python.org (http://www.python.org/ftp/python/2.5/python-2.5-macosx.dmg), which should
> also update your shell profiles as necessary.
>
> HTH
>
> has

Thanks...

Robert



From paddy3118 at googlemail.com  Thu Mar  8 00:02:06 2007
From: paddy3118 at googlemail.com (Paddy3118)
Date: 7 Mar 2007 21:02:06 -0800
Subject: VIM: Python type indented-block command equivalent to % for C?
Message-ID: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>


  Not python:
    but python type
    indented text

    Notice the blank line above.
    It could have several
    spaces or tabs, and still
    be a part of the block
    beginning 'Not python:':
      The block ends at the
      first non-blank line
      with less indent.

Assuming that only space characters are allowed
for indenting, is their a way to yank a Python
block like y% works for C , or a way to move to
the end of a block defined by indentation?

I have tried help indent but could not find
anything.

Thanks, Paddy.



From nagle at animats.com  Tue Mar 20 14:29:46 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 20 Mar 2007 18:29:46 GMT
Subject: Exceptions when closing a file
In-Reply-To: <etp7jo$vol$1@rumours.uwaterloo.ca>
References: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
	<etp7jo$vol$1@rumours.uwaterloo.ca>
Message-ID: <uKVLh.9516$Um6.3423@newssvr12.news.prodigy.net>

Ross Ridge wrote:
> Steven D'Aprano  <steve at REMOVE.THIS.cybersource.com.au> wrote:
> 
>>Closing a file can (I believe) raise an exception. Is that documented
>>anywhere? 
> 
> 
> In a catch-all statement for file objects: "When a file operation fails
> for an I/O-related reason, the exception IOError is raised."  The fact
> that close() is a file operation that might fail is revealed by "file
> objects are implemented using C's stdio package" and the fact the C's
> fclose() function can fail.
> 
> 
>>Is IOError the only exception it can raise?

     Closing a file that's being written can, of course, fail.
An I/O error is possible as the file is flushed to disk.

     This is useful; after the close has returned, you have
some confidence that the file has been fully written.

     If you want to force this error, write to a drive
reached over a network, or a removable medium like a floppy
or flash card.  Open a file for writing and disconnect the
network or remove the removable medium.

				John Nagle


From dayakarbabu at gmail.com  Thu Mar  8 05:43:57 2007
From: dayakarbabu at gmail.com (alex)
Date: 8 Mar 2007 02:43:57 -0800
Subject: Here is a link to sign up www.agloco.com/r/BBBV2104 AGLOCO works with
	a toolbar type software called a Viewbar. Privacy is very
	strict so no spyware,
	popups or spam.     As to how much money you can make,
	there is a study which says the average user should get $5 to $15 a
	month. (But less at the beginning.) Click here to read the
	report. http://simmonsreport.spaces.live.com How much can you
	make helping to build the network? The Simmons Report predicts
	$30 per referral. I have 200,
	but a friend of mine RZ  McCall has over 8,
	000. He has a great blog site http://mccallsnotes.spaces.live.com .
	AGLOCO is in their beta phase which is the best time to help
	them build out the network. So please join now and help build
	the network. Have questions? Their website has all the details
	so go there www.agloco.com/r/BBBV2104.
	www.agloco.com/r/BBBV2104 read this friends .... how good it is ?
Message-ID: <1173350637.007613.325250@n33g2000cwc.googlegroups.com>

Hi Friends,


 This note is mainly to offer you a chance to help build AGLOCO - it
is a Member-owned Internet community.

 Here is why I would like you to help. First - it is free. Second - it
is quick and easy to join. Third - AGLOCO's purpose is to get its
members their share of the money generated on the Internet (i.e. you
make money). And lastly - if you help build the AGLOCO network you can
make much more.

 Here is a link to sign up www.agloco.com/r/BBBV2104

 AGLOCO works with a toolbar type software called a Viewbar. Privacy
is very strict so no spyware, popups or spam.

 As to how much money you can make, there is a study which says the
average user should get $5 to $15 a month. (But less at the
beginning.) Click here to read the report. http://simmonsreport.spaces.live.com

 How much can you make helping to build the network? The Simmons
Report predicts $30 per referral. I have 200, but a friend of mine RZ
McCall has over 8,000. He has a great blog site http://mccallsnotes.spaces.live.com
.

 AGLOCO is in their beta phase which is the best time to help them
build out the network. So please join now and help build the network.
Have questions? Their website has all the details so go there
www.agloco.com/r/BBBV2104.

www.agloco.com/r/BBBV2104

Alexander



From hancock at anansispaceworks.com  Wed Mar  7 01:28:44 2007
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 07 Mar 2007 00:28:44 -0600
Subject: Project organization and import
In-Reply-To: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
Message-ID: <45EE5B9C.4050500@anansispaceworks.com>

Martin Unsal wrote:
> I'm using Python for what is becoming a sizeable project and I'm
> already running into problems organizing code and importing packages.
> I feel like the Python package system, in particular the isomorphism
> between filesystem and namespace, doesn't seem very well suited for
> big projects.

I've never worked on what you would call a "big project", but I *am*
kind of a neat-freak/control-freak about file organization of code, so I
have tinkered with the structure of source trees in Python quite a bit.

If you want to explode a module into a lot of smaller files, you create
a package. I find that this usually works best like this (this is what
the filesystem looks like):

package_name/
     package_pre.py - contains globals for the package
     component_a.py    - a useful-sized collection of functionality
     component_b.py    - another
     component_c.py    - another
     package_post.py   - stuff that relies on the prior stuff
     __init__.py       - or you can put the "post" stuff here

Then __init__.py contains something like:

from package_pre import *
from component_a import *
from component_b import *
from component_c import *
from package_post import *

or you can explicitly load what you need:

from package_pre import *
from component_a import A, A1, A2
from component_a import A3 as A5
from component_b import B, B1
from component_c import C, C2, C5
from package_post import *

if you want to keep the namespace cleaner.

Also, instead of just dropping things into the module's global
namespace, use an named namespace, such as a class, or use the
"package_pre" in the example above. That helps to keep things separable.

IOW, you can use __init__.py to set up the package's namespace anyway
you want, breaking the actual code up into just about as many files as
you like (I also don't like reading long source files -- I find it
easier to browse directories than source files, even with outlining
extensions. It's rare for me to have more than 2-3 classes per file).

Of course, if you *really* want your namespace to be *completely*
different from the filesystem, then there's no actual reason that all of
these files have to be in the same directory. You can use Python's
relative import (standard in Python 2.5+, available using __future__ in
2.4, IIRC) to make this easier. There was an obnoxious hack used in Zope
which used code to extract the "package_path" and then prepend that to
get absolute import locations which was necessary in earlier versions --
but I can't recommend that, just use the newer version of Python.

So, you could do evil things like this in __init__.py:

from .other_package.fiddly_bit import dunsel

(i.e. grab a module from a neighboring package)

Of course, I really can't recommend that either. Python will happily do
it, but it's a great way to shoot yourself in the foot in terms of
keeping your code organized!

The only exception to that is that I often have a "util" or "utility"
package which has a collection of little extras I find useful throughout
 my project.

As for relying heavily on reload(), it isn't that great of a feature for
debugging large projects. Any code of sufficient size to make reload()
problematic, though, needs formal unit testing, anyway. The cheapest and
easiest unit test method is doctests (IMHO), so you ought to give those
a try -- I think you'll like the easy relationship those have to working
in the interactive interpreter: just walk your objects through their
paces in the interpreter, then cut-and-paste.

What reload() and the interactive interpreter is good for is
experimentation, not development.

If you need huge amounts of code to be loaded to be able to do any
useful experiments with the modules you are writing, then your code is
too tightly coupled to begin with. Try to solve that by using something
like "mock objects" to replace the full blown implementations of objects
 you need for testing. I've never formally used any of the "mock"
packages, but I have done a number of tests using objects which are
dumbed-down versions of objects which are really supposed to be provided
from another module -- but I wanted to test the two separately (which is
essentially creating my own mock objects from scratch).

HTH,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From rehceb at no.spam.plz  Sat Mar 31 20:36:20 2007
From: rehceb at no.spam.plz (Rehceb Rotkiv)
Date: Sat, 31 Mar 2007 19:36:20 -0500
Subject: Unicode list
Message-ID: <pan.2007.04.01.00.36.27@no.spam.plz>

Hello,

I have this little grep-like program:

++++++++++snip++++++++++
#!/usr/bin/python

import sys
import re

pattern = sys.argv[1]
inputfile = file(sys.argv[2], 'r')

for line in inputfile:
    matches = re.findall(pattern, line)
    if matches:
        print matches
++++++++++snip++++++++++

Like this, the program prints some characters as strange escape 
sequences, which is due to the input file being encoded in utf-8: When I 
convert "re.findall..." to a string and wrap an "unicode()" around it, 
the matches get printed correctly. Is it possible to make "matches" 
unicode without saving it as a single string first? The function "unicode
()" seems only to work for strings. Or is there a general way of telling 
Python to abandon the ancient and evil land of iso-8859 for good and use 
utf-8 only?

Regards,
Rehceb


From paul at boddie.org.uk  Sat Mar 10 19:57:44 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Mar 2007 16:57:44 -0800
Subject: convert time string in UTC to time in local time
In-Reply-To: <mailman.4821.1173391042.32031.python-list@python.org>
References: <mailman.4821.1173391042.32031.python-list@python.org>
Message-ID: <1173574664.739798.199770@h3g2000cwc.googlegroups.com>

davelist at mac.com wrote:
> I'm guessing there is an easy way to do this but I keep going around
> in circles in the documentation.
>
> I have a time stamp that looks like this (corresponding to UTC time):
>
> start_time = '2007-03-13T15:00:00Z'
>
> I want to convert it to my local time.
>
> start_time = time.mktime(
>     time.strptime(start_time, '%Y-%m-%dT%H:%M:00Z')
>     )

Here, strptime in this case will probably produce a time whose
daylight saving time (DST) status will be undecided, although I've
done some tests with glibc which suggests that the native (unused by
Python) strptime produces non-DST-affected times for both the given
date and for a date one month later in my time zone (contrary to what
one might expect). Then, mktime is called, but this may apply various
time zone magic to treat the supplied time as a local time, not a GMT/
UTC time - this seems to be an artifact of the way mktime is defined
and implemented in various standards.

Do this to see what I'm talking about:

time.mktime(time.gmtime(0))

Unless you have GMT/UTC as your time zone, the above may well not
produce zero as its result. Similar tests in C behave identically.

> start_time -= time.timezone

So, here you've applied a time shift in order to hopefully go from GMT/
UTC to local time. Given my observations of mktime, I'm inclined to
believe that you've time shifted beyond local time, but the principle
seems reasonable. See below for more discussion.

> This was working fine now, but if I do it for a date next week (such
> as March 13th in the above example), it breaks because my local time
> moves to daylight savings time this weekend. So my time is now off by
> an hour. I'm guessing if I try this next week it will work okay
> because time.timezone will be give a different value next week - is
> that correct?

The value of time.timezone should remain the same. In your time tuple/
structure (produced by strptime) there's a field called tm_isdst (it's
the value in the last position) which governs when DST applies. If DST
applies you need to use time.altzone instead of time.timezone to guide
conversions between local time and GMT/UTC.

> Is there a direct way to convert that timestamp in UTC to a local
> time stamp that will always work?

I think you have to test tm_isdst and then apply time.timezone (if
tm_isdst is 0) or time.altzone (if tm_isdst is 1) in the way you've
attempted. But as I said, you have to be careful with mktime, since
tests both with Python and directly against glibc suggest that it
considers the time to be local, and a subsequent call to localtime
won't actually give you a different hour, minute and second than that
provided in the supposedly GMT/UTC time.

Paul

P.S. There's more to come on this topic, since I'm trying to improve
time zone support on time tuples/structures. It's an arcane business,
however, and I'm still trying to make sense out of the behaviour of
various library functions.



From spohle at gmail.com  Sat Mar 17 19:17:08 2007
From: spohle at gmail.com (spohle)
Date: 17 Mar 2007 16:17:08 -0700
Subject: formatting strings to have the same width
In-Reply-To: <1174172864.205137.193740@y66g2000hsf.googlegroups.com>
References: <1174172864.205137.193740@y66g2000hsf.googlegroups.com>
Message-ID: <1174173428.779736.298390@p15g2000hsd.googlegroups.com>

sorry the code should read:

foo = ["aaa", "1232"]
for each in foo:
    print each.center(10, " ") + " | "



From pydecker at gmail.com  Sun Mar 18 09:09:13 2007
From: pydecker at gmail.com (Peter Decker)
Date: Sun, 18 Mar 2007 09:09:13 -0400
Subject: IDE for wxPython
In-Reply-To: <457369853.20070317221202@ghirai.com>
References: <457369853.20070317221202@ghirai.com>
Message-ID: <ca55a9900703180609g6e6dd71ar1e677291f931d458@mail.gmail.com>

On 3/17/07, Ghirai <ghirai at ghirai.com> wrote:

> Can anyone suggest an IDE for wxPython?
> Or an IDE for TkInter?

Don't know about Tkinter, but for wxPython, I would suggest Dabo. You
get their visual tools, along with a more robust and consistent
wrapper around the wxPython API.

-- 

# p.d.


From fabiofz at gmail.com  Thu Mar  1 06:16:39 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Thu, 1 Mar 2007 08:16:39 -0300
Subject: Is there a technic to avoid this bug
In-Reply-To: <KzXEh.5944$3b5.3788@newsfe24.lga>
References: <HrVEh.91860$5F3.44100@newsfe14.lga>
	<54inn6F2115doU1@mid.uni-berlin.de>
	<1172586643.865731.78020@m58g2000cwm.googlegroups.com>
	<KzXEh.5944$3b5.3788@newsfe24.lga>
Message-ID: <cfb578b20703010316i39704d89qd20c7292a69dd68a@mail.gmail.com>

On 2/27/07, hg <hg at nospam.org> wrote:
>
> Michele Simionato wrote:
>
> > pychecker
>
> Thanks all ... pydev extension does not however ... will have to install
> pychecker also.
>

Just as a note: pydev extensions 1.2.8 supports that... (just released)

Cheers,

Fabio
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From devrim.erdem at gmail.com  Fri Mar 30 05:04:45 2007
From: devrim.erdem at gmail.com (DE)
Date: 30 Mar 2007 02:04:45 -0700
Subject: Indentation for code readability
Message-ID: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>

Hello,

Here is what I do in C++ and can not right now in python :

pushMatrix()
{
     drawStuff();

     pushMatrix();
     {
            drawSomeOtherStuff()
     }
     popMatrix();
}
popMatrix();

The curly brackets have no functional meaning but increase the
readability significantly. I want to be able to do the same thing in
python. Since curly brackets are not available and indenting without
an if or while conditional doesn't work, I have started to question if
this is possible in python at all.

Any ideas ?

MDE



From openopt at ukr.net  Thu Mar 15 14:56:18 2007
From: openopt at ukr.net (dmitrey)
Date: 15 Mar 2007 11:56:18 -0700
Subject: right-format of integer output as text
In-Reply-To: <pan.2007.03.15.18.51.57.460777@gmx.net>
References: <1173984339.188538.200880@l75g2000hse.googlegroups.com>
	<pan.2007.03.15.18.51.57.460777@gmx.net>
Message-ID: <1173984978.433719.285100@l77g2000hsb.googlegroups.com>

Thank you Marc, it is exactly the same I asked for.
D.



From grflanagan at yahoo.co.uk  Fri Mar  9 02:49:59 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 8 Mar 2007 23:49:59 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <mailman.4795.1173346304.32031.python-list@python.org>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
Message-ID: <1173426599.403173.49240@v33g2000cwv.googlegroups.com>

On Mar 8, 10:31 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 08 Mar 2007 06:17:37 -0300, Gerard Flanagan
> <grflana... at yahoo.co.uk> escribi?:
>
> > @onfail(False)
> > def a(x):
> >     if x == 1:
> >         return 'function a succeeded'
> >     else:
> >         raise
>
> I know it's irrelevant, as you use a bare except, but such raise looks a
> bit ugly...
>
> --
> Gabriel Genellina

Agreed. I thought a 'gentle reader' could have filled in the blanks,
but I suppose I should have taken the time to put in a custom
exception.

Another version:

import exceptions

class ABCException(exceptions.Exception):
    pass

class DoItException(exceptions.Exception):
    pass

def onfailFalse(fn):
    def inner(*args, **kwargs):
        try:
            return fn(*args, **kwargs)
        except ABCException:
            return False
    return inner

@onfailFalse
def a(x):
    if x == 1:
        return 'function a succeeded'
    else:
        raise ABCException()

@onfailFalse
def b(x):
    if x == 2:
        return 'function b succeeded'
    else:
        raise ABCException()

@onfailFalse
def c(x):
    if x == 3:
        return 'function c succeeded'
    else:
        raise ABCException()

def doit(x):
    for f in [a, b, c]:
        result = f(x)
        if result:
            return result
    raise DoItException()

print doit(1)
print doit(2)
print doit(3)
print doit(4)



From shandy.b at gmail.com  Tue Mar 13 14:34:34 2007
From: shandy.b at gmail.com (shandy.b at gmail.com)
Date: 13 Mar 2007 11:34:34 -0700
Subject: CD insert/eject detection
In-Reply-To: <1173797681.851722.41340@64g2000cwx.googlegroups.com>
References: <1173797681.851722.41340@64g2000cwx.googlegroups.com>
Message-ID: <1173810874.352847.234760@c51g2000cwc.googlegroups.com>

I've never used it myself, but pygame (based on SDL - so it should
work for MS Windows, Linux, and Apple OSX) has a CD module with some
potentially useful functions, CD.eject() and CD.get_empty().

http://www.pygame.org/docs/ref/cdrom.html#pygame.cdrom.CD

-sjbrown

On Mar 13, 7:54 am, "Mark Bryan Yu" <vaf... at gmail.com> wrote:
> Hi,
>
> I'm trying to make a Audio CD ripper using python.
>
> is there a way (library, module, etc) to detect when a CD was inserted
> or ejected?




From jordan.taylor2 at gmail.com  Sat Mar  3 21:20:47 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 3 Mar 2007 18:20:47 -0800
Subject: pyHook or SetWindowsHookEx
In-Reply-To: <1172584873.585035.319570@m58g2000cwm.googlegroups.com>
References: <1172584873.585035.319570@m58g2000cwm.googlegroups.com>
Message-ID: <1172974847.570950.218550@n33g2000cwc.googlegroups.com>

On Feb 27, 9:01 am, "abcd" <codecr... at gmail.com> wrote:
> I am having trouble with pyHook on python 2.4.1.  Basically I have a
> python app that uses pyHook to capture keyboard events and write them
> straight to a file.  The application is running as a service on a
> windows machine.  If I am at that windows machine the application
> works just fine, logging my keystrokes.  However, if I use Remote
> Desktop to connect to the machine and open up say Notepad it doesn't
> capture the keystrokes.  Is this a problem with pyHook?  or is it he
> way Windows handles the events?
>
> Is there a way to setup my own hook without pyHook using just python?
> i think the function I am interested in is SetWindowsHookEx.
>
> Thanks in advance.

I'm pretty sure it's not a problem with pyHook.  I'm also fairly sure
that you can't log the keystrokes of someone who is logged onto your
machine from another; that would be a major security flaw.  The only
way (I think) this would work is if you wrote your own remote desktop
program that logged keystrokes, and then sent it to the remote
computer when logging off.

Cheers,
Jordan



From noone at nowhere.com  Mon Mar 26 13:21:22 2007
From: noone at nowhere.com (Josh)
Date: Mon, 26 Mar 2007 13:21:22 -0400
Subject: how to abort on syntax errors
Message-ID: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>

I have a lot of except Exception, e statements in my code, which poses some 
problems. One of the biggest is whenever I refactor even the triviallest 
thing in my code.

I would like python to abort, almost as if it were a compile-time error, 
whenever it cannot find a function, or if I introduced a syntax error. But, 
instead, it merrily proceeds on its way.

Is there some idiom that you use in situations like these?
thanks,
josh




From akbarhome at gmail.com  Wed Mar  7 05:25:38 2007
From: akbarhome at gmail.com (akbar)
Date: 7 Mar 2007 02:25:38 -0800
Subject: finding monitor or screen resolution in Linux with standard python
	module
Message-ID: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>

I googled and searched in archive. All I can find is finding
resolution with Tkinter and pygame. Any idea to find monitor
resolution with standard python module?
I can check from output of: xprop -root
_NET_DESKTOP_GEOMETRY(CARDINAL) . The problem is when you use Beryl or
Xgl, it is not correct anymore because Beryl or Xgl set this value
from amount of workspaces multiplied by monitor or screen resolution.



From grante at visi.com  Wed Mar 14 17:10:41 2007
From: grante at visi.com (Grant Edwards)
Date: Wed, 14 Mar 2007 21:10:41 -0000
Subject: string formatting: engineering notation
References: <et9l3u$e57$1@ruby.cit.cornell.edu>
	<mailman.5113.1173906028.32031.python-list@python.org>
Message-ID: <12vgp6h1h62fg51@corp.supernews.com>

On 2007-03-14, Steve Holden <steve at holdenweb.com> wrote:
> Darren Dale wrote:
>> Does anyone know if it is possible to represent a number as a string with
>> engineering notation (like scientific notation, but with 10 raised to
>> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
>> decimal.Decimal class, but repeatedly instantiating Decimals is inefficient
>> for my application (matplotlib plotting library). If it is not currently
>> possible, do you think the python devs would be receptive to including
>> support for engineering notation in future releases?
>> 
> How close is this:
>
>  >>> "%.3e" % 3.14159
> '3.142e+00'

Not close at all. It should be "3.14159"

>>> "%.3e" % 31.4159
'3.142e+01'

should be 31.4159

>>> "%.3e" % 314.159
'3.142e+02'

should be 314.159

>>> "%.3e" % 31415.9
'3.142e+04'

should be 31.4159e3

-- 
Grant Edwards                   grante             Yow!  LOU GRANT froze
                                  at               my ASSETS!!
                               visi.com            


From nszabolcs at gmail.com  Wed Mar 14 06:32:00 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 14 Mar 2007 03:32:00 -0700
Subject: python/C++ wrapper
In-Reply-To: <mailman.5070.1173866359.32031.python-list@python.org>
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
	<1173865112.666847.288360@l75g2000hse.googlegroups.com>
	<mailman.5070.1173866359.32031.python-list@python.org>
Message-ID: <1173868320.478593.64570@n76g2000hsh.googlegroups.com>


> Well, pyogre has few problems with maintenance, and new bindings to
> Ogre engine was
> created using Boost.Python( http://www.ogre3d.org/wiki/index.php/PyOgre )

oh
last time i played with pyogre they made a transition from boost to
swig :)
so they are back again at boost
(the problem with boost was the slow recompilation time with all the
gccxml parsing and a few other problems which maybe got resolved)

> --
> Roman Yakovenko
> C++ Python language binding
> http://www.language-binding.net/

thanks for the info this py++ looks promising



From yinglcs at gmail.com  Sat Mar 10 16:06:34 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 10 Mar 2007 13:06:34 -0800
Subject: Need help in using mod_python
Message-ID: <1173560794.835409.34400@v33g2000cwv.googlegroups.com>




Hi,

I am trying to setup Apache with Trac which uses mod_python. I get the
following error:

assert have_pysqlite > 0

And I have verify this  via command line as well, that seem no
problem.
# python
Python 2.3.4 (#1, Feb  2 2005, 11:44:49)
[GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import trac.db.sqlite_backend
>>> trac.db.sqlite_backend._ver
(3, 3, 13)
>>> trac.db.sqlite_backend.have_pysqlite
2
>>> trac.db.sqlite_backend.sqlite.version

'2.3.3'

But when i access the Trac via Apache (with mod_python), i get the
following error:

File "/usr/lib/python2.3/site-packages/trac/db/pool.py", line 101, in
get_cnx
   cnx = self._connector.get_connection(**self._kwargs)

 File "/usr/lib/python2.3/site-packages/trac/db/sqlite_backend.py",
line 113, in get_connection
   return SQLiteConnection(path, params)

 File "/usr/lib/python2.3/site-packages/trac/db/sqlite_backend.py",
line 140, in __init__
   assert have_pysqlite > 0



From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 16:43:09 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 22:43:09 +0100
Subject: New to Python
In-Reply-To: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
References: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
Message-ID: <45ec86f2$0$472$426a74cc@news.free.fr>

dnwurtz at gmail.com a ?crit :
> I am trying to get a program to add up input from the user to get to
> the number 100 using a loop.  However, I am having some issues.  Here
> is what I have so far.  I know I am just trying to hard, but I am
> stuck.  

Where ?

May I suggest this reading ?
http://www.catb.org/~esr/faqs/smart-questions.html

> Thank you for any help.
> 
> print "We need to count to 100"
> 
> high_number = 100
> total = 0
> 
> number = input("Enter your first number ")

Please re-read *very carefully* the doc for input(). Then switch to 
raw_input() and perform appropriate validation and conversion.

> sum = number + total

don't use 'sum' as an identifier, unless you don't mind shadowing the 
builtin sum() function.

> while sum < high_number:
>     print "Not there yet..."
>     number = input("Enter another number ")
> 
> print "We are there!!!"

We're not. number won't be automagically added to sum.



From http  Sun Mar 11 18:49:05 2007
From: http (Paul Rubin)
Date: 11 Mar 2007 14:49:05 -0800
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
	<Xns98F0AFA4DC7DAtim111one@216.196.97.136>
	<1173648587.967820.254030@8g2000cwh.googlegroups.com>
Message-ID: <7xhcsrqtum.fsf@ruckus.brouhaha.com>

"Mark Dickinson" <dickinsm at gmail.com> writes:
> By the way, I don't suppose that anybody would be interested in
> a rewritten cmath for Python 2.6?  It wouldn't be hard for me to
> rewrite what I already have in C, and add suitable documentation
> and tests.

I can't speak for the developers but my personal opinion is that this
is worthwhile.  I'm pretty Common Lisp and Scheme specify the branch
cuts and I believe Java does the same.  That is to help with the
consistency and predicability of program behavior as well as to help
various numerical algorithms.  C has a different goal, which is to be
a semi-portable assembly language, putting priority instead on
minimizing intermediation between the programmer and the machine,
instead of on predicability.  Python should take the approach of the
higher level languages and implement this stuff precisely, instead of
just going along with whatever loose semantics the underlying C
implementation happens to supply.


From vafada at gmail.com  Tue Mar 13 11:09:50 2007
From: vafada at gmail.com (Mark Bryan Yu)
Date: 13 Mar 2007 08:09:50 -0700
Subject: CD insert/eject detection
In-Reply-To: <45F6BE29.40802@websafe.com>
References: <1173797681.851722.41340@64g2000cwx.googlegroups.com>
	<45F6BE29.40802@websafe.com>
Message-ID: <1173798590.728979.84080@64g2000cwx.googlegroups.com>

On Mar 13, 11:07 am, Larry Bates <lba... at websafe.com> wrote:
> Mark Bryan Yu wrote:
> > Hi,
>
> > I'm trying to make a Audio CD ripper using python.
>
> > is there a way (library, module, etc) to detect when a CD was inserted
> > or ejected?
>
> That is going to be OS dependent, so please share with us
> what OS you are on?
>
> -Larry

Linux. I guess that means i need to make a C/C++ module extension to
do such task.



From steve at holdenweb.com  Thu Mar 22 04:57:06 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 04:57:06 -0400
Subject: Regexp problem with `('
In-Reply-To: <20070322083756.GA22172@cactus.homeunix.org>
References: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
	<20070322083756.GA22172@cactus.homeunix.org>
Message-ID: <ettgfj$t94$2@sea.gmane.org>

Zeng Nan wrote:
> On Thu, Mar 22, 2007 at 01:26:22AM -0700, Johny wrote:
>> I have  the following text
>>
>> <title>Goods Item  146 (174459989)  - OurWebSite</title>
>>
>> from which I need to extract
>> `Goods Item  146 '
>>
>> Can anyone help with regexp?
>> Thank you for help
>> L.
> 
> (Goods\s+Item\s+146\s+)
> 
> 
[snigger]

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From "greenbergj\" at  NOSPAM wit.edu  Mon Mar 12 06:35:26 2007
From: "greenbergj\" at  NOSPAM wit.edu (Jordan Greenberg)
Date: Mon, 12 Mar 2007 06:35:26 -0400
Subject: Object instance "reporting" to a container class instance
In-Reply-To: <mailman.4952.1173659784.32031.python-list@python.org>
References: <mailman.4952.1173659784.32031.python-list@python.org>
Message-ID: <et3acs$t45$1@registered.motzarella.org>

Daniel Lipovetsky wrote:
> I would like for an object to "report" to a container object when a
> new instance is created or deleted. I could have a container object
> that is called when a new instance is created, as below.

I've run into a similar problem before, in my case it was easiest to 
allow the container to create the new instances, sort of like:

<CODE>

class Something(object):
	def __init__(self, *args):
		self.x=args

class Container(object):
	def __init__(self):
		self.instances=[]

	def newinstance(self, newclass, *args):
		tmp=newclass(args)
		self.instances.append(tmp)
		return tmp
	
	def delinstance(self, inst):
		self.instances.remove(inst)
cont=Container()
a=cont.newinstance(Something, 5, 6)
b=cont.newinstance(Something, 7, 8)
c=cont.newinstance(Something, 8, 9)

print len(cont.instances)

cont.delinstance(b)
print len(cont.instances)

#note that b is still defined, unless you remove that name explicitly...
print b
del b
print b

</CODE>

This can be very, very, very ugly. I don't particularly actually 
recommend doing anything like this. Usually you should re-think your 
organization to make this unnecessary. I suppose, though, it can come in 
handy in certain situations.

-Jordan G


From jkn_gg at nicorp.f9.co.uk  Tue Mar 13 14:02:09 2007
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 13 Mar 2007 11:02:09 -0700
Subject: Communicating with a DLL under Linux
In-Reply-To: <mailman.5023.1173805183.32031.python-list@python.org>
References: <mailman.5023.1173805183.32031.python-list@python.org>
Message-ID: <1173808929.670120.5800@8g2000cwh.googlegroups.com>

Hi Mikael
    It is probably worth you finding out more about the specific
Hardware that Velleman use for this kit. Depending on the chip
manufacturer, there may be more or less support already available. For
instance, I have recently been communicating with the FTDI USB chips
under windows. There is a PyUSB module which might help you do
something similar, and the FTDI website has quite a lot of
information.

As it turns out, I didn't use PyUSB - for reasons connected with the
version number of Python and annoying things like that (aside - has
anyone got PyUSB compiled for 2.5?). I developed my own pure python
interface to the FTDI chips DLL, using ctypes. So yes, this can be
done. I think you'd be on quite a learning curve for this, from what
you say, but don't let that put you off! Unfortunately I can't share
my code with you, but just knowing that it can be done is sometimes a
help...

FTDI make some evaluation boards for their USB chips and you might
consider going that route... http://www.ftdichip.com BTW. No
connection, just a customer/developer.

    HTH
    jon N



From metaperl at gmail.com  Tue Mar 13 08:43:32 2007
From: metaperl at gmail.com (metaperl)
Date: 13 Mar 2007 05:43:32 -0700
Subject: most complete xml package for Python?
Message-ID: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>

Without even checking them all out, I'm thinking the Amara XML Toolkit
must be the most feature-packed. The developers are readily available
on IRC for support and they seem to make regular releases.

As a meld3 user, I have been using ElementTree under the hood, but was
dismayed to find out that you can't find elements by attribute and I
am finding it difficult to remove elements.

So I am out shopping for a new friend to grok XML.

Input welcome.



From mensanator at aol.com  Tue Mar 13 13:59:03 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 13 Mar 2007 10:59:03 -0700
Subject: Eureka moments in Python
In-Reply-To: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <1173808743.312252.195650@t69g2000cwt.googlegroups.com>

On Mar 13, 2:16 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> I'd be interested in hearing people's stories of Eureka moments in Python,
> moments where you suddenly realise that some task which seemed like it
> would be hard work was easy with Python.
>

##    I have this problem where, given a list of non-zero
##    positive integers (sv), I need to calculate threee constants
##    x, y, z where
##
##    x is 2 raised to the power of the sum of the elements in sv,
##
##    y is 3 raised to the power of the count of the elements in sv,
##
##    and
##
##    z is 3**a*2**A + 3**b*2**B + ... + 3**m*2**M + 3**n*2**N
##
##    where a,b,...m,n are 0,1,...len(sv)-2,len(sv)-1 and
##    N is the sum of all elements of sv except the last one,
##    M is the sum of all elements of sv except the last two,
##    ...
##    B is the sum of all elements of sv except the last len(sv)-1,
##    A is the sum of all elements of sv except the last len(sv).
##
##    This turned out to be one of those things that's
##    easier to code than to describe.
##
##    And if you saw my original Excel spreadsheet where I
##    developed it, you'd say Eureka too.

def calc_xyz(sv):
    x = 2**sum(sv)
    y = 3**len(sv)
    z = 0
    for i in xrange(len(sv)):
        z += 3**i * 2**sum(sv[:-(i+1)])
    return (x,y,z)

sv = [1,2,3,4]
print calc_xyz(sv)

##    (1024, 81, 133)



From tron.thomas at verizon.net  Wed Mar 28 22:33:51 2007
From: tron.thomas at verizon.net (tron.thomas at verizon.net)
Date: 28 Mar 2007 19:33:51 -0700
Subject: Can't use class variable with private nested class
In-Reply-To: <1hvnmot.1tmqpcq173vcowN%aleax@mac.com>
References: <1175057276.163869.12850@y66g2000hsf.googlegroups.com>
	<1hvnmot.1tmqpcq173vcowN%aleax@mac.com>
Message-ID: <1175135631.742221.178970@p15g2000hsd.googlegroups.com>

On Mar 27, 10:08 pm, a... at mac.com (Alex Martelli) wrote:
>
> Forget all the naming silliness and use self.__class__.printOnce
> instead.
>
> Alex

I tried self.__class__.printOnce and that worked.  Thanks for your
help.



From pascal.costanza at gmail.com  Tue Mar  6 11:51:21 2007
From: pascal.costanza at gmail.com (Pascal Costanza)
Date: 6 Mar 2007 08:51:21 -0800
Subject: [CfP] Dynamic Languages Symposium 2007
Message-ID: <1173199877.954109.112670@h3g2000cwc.googlegroups.com>

************************************************************************
*
*
*                   Dynamic Languages Symposium 2007
*
*                at ooPSLA 2007 - http://www.oopsla.org
*
*
*
*              Montreal, Quebec, Canada, October 22, 2007
*
*
*
*               http://www.swa.hpi.uni-potsdam.de/dls07/
*
*
*
************************************************************************

Important dates:
****************

* Submission of papers: June 1, 2007 *hard deadline*
* Author notification:  June 30, 2007
* Final versions due:   July 7, 2007
* DLS 2007:             October 22, 2007
* OOPSLA 2007:          October 21-25, 2007

Scope:
******

The Dynamic Languages Symposium (DLS) at OOPSLA 2007 in Montreal,
Canada, is a forum for discussion of dynamic languages, their
implementation and application. While mature dynamic languages
including
Smalltalk, Lisp, Scheme, Self, and Prolog continue to grow and inspire
new converts, a new generation of dynamic scripting languages such as
Python, Ruby, PHP, and JavaScript are successful in a wide range of
applications. DLS provides a place for researchers and practitioners
to
come together and share their knowledge, experience, and ideas for
future research and development.

DLS 2007 invites high quality papers reporting original research,
innovative contributions or experience related to dynamic languages,
their implementation and application. Accepted Papers will be
published
in the OOPSLA conference companion and the ACM Digital Library.

Areas of interest include but are not limited to:
*************************************************

* Innovative language features and implementation techniques
* Development and platform support, tools
* Interesting applications
* Domain-oriented programming
* Very late binding, dynamic composition, and runtime adaptation
* Reflection and meta-programming
* Software evolution
* Language symbiosis and multi-paradigm languages
* Dynamic optimization
* Hardware support
* Experience reports and case studies
* Educational approaches and perspectives
* Object-oriented, aspect-oriented, and context-oriented programming

Submissions and proceedings
***************************

We invite original contributions that neither have been published
previously nor are under review by other refereed events or
publications. Research papers should describe work that advances the
current state of the art. Experience papers should be of broad
interest
and should describe insights gained from substantive practical
applications. The program committee will evaluate each contributed
paper
based on its relevance, significance, clarity, and originality.

Papers are to be submitted electronically at
http://www.dcl.hpi.uni-potsdam.de/dls2007/ in PDF format.
Submissions must not exceed 12 pages and need to use the ACM format,
templates for which can be found at
http://www.acm.org/sigs/pubs/proceed/template.html.

Program chairs:
***************

* Pascal Costanza, Programming Technology Lab,
   Vrije Universiteit Brussel, Belgium

* Robert Hirschfeld, Hasso-Plattner-Institut,
   University of Potsdam, Germany

Program committee:
******************

* Gilad Bracha, Cadence Design Systems, USA
* Johan Brichau, Universite Catholique de Louvain, Belgium
* William Clinger, Northeastern University, USA
* William Cook, University of Texas at Austin, USA
* Pascal Costanza, Vrije Universiteit Brussel, Belgium
* Stephane Ducasse, Universite de Savoie, France
* Brian Foote, Industrial Logic, USA
* Robert Hirschfeld, Hasso-Plattner-Institut Potsdam, Germany
* Jeremy Hylton, Google, USA
* Shriram Krishnamurthi, Brown University, USA
* Michele Lanza, University of Lugano, Switzerland
* Michael Leuschel, Universitaet Duesseldorf, Germany
* Henry Lieberman, MIT Media Laboratory, USA
* Martin von Loewis, Hasso-Plattner-Institut Potsdam, Germany
* Philippe Mougin, OCTO Technology, France
* Oscar Nierstrasz, University of Berne, Switzerland
* Kent Pitman, PTC, USA
* Ian Piumarta, Viewpoints Research Institute, USA
* Nathanael Schaerli, Google, Switzerland
* Anton van Straaten, AppSolutions.com, USA
* Dave Thomas, Bedarra Research Labs, Canada
* Dave Ungar, USA
* Allen Wirfs-Brock, Microsoft, USA
* Roel Wuyts, IMEC & Unversite Libre de Bruxelles, Belgium



From marek.rocki at wp.pl  Fri Mar 16 16:05:14 2007
From: marek.rocki at wp.pl (marek.rocki at wp.pl)
Date: 16 Mar 2007 13:05:14 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
Message-ID: <1174075514.144163.211660@o5g2000hsb.googlegroups.com>

My attempt uses a different approach: create two sorted arrays, n^2
elements each; and then iterate over them looking for matching
elements (only one pass is required). I managed to get 58,2250612857 s
on my 1,7 MHz machine. It requires numpy for decent performance,
though.

import numpy
import time

def parse_input():
	al, bl, cl, dl = [], [], [], []
	for i in xrange(int(raw_input())):
		a, b, c, d = map(int, raw_input().split())
		al.append(a)
		bl.append(b)
		cl.append(c)
		dl.append(d)
	return al, bl, cl, dl

def count_zero_sums(al, bl, cl, dl):
	n = len(al) # Assume others are equal

	# Construct al extended (every element is repeated n times)
	ale = numpy.array(al).repeat(n)
	del al
	# Construct bl extended (whole array is repeated n times)
	ble = numpy.zeros((n*n,), int)
	for i in xrange(n): ble[i*n:(i+1)*n] = bl
	del bl
	# Construct abl - sorted list of all sums of a, b for a, b in al, bl
	abl = numpy.sort(ale + ble)
	del ale, ble

	# Construct cl extended (every element is repeated n times)
	cle = numpy.array(cl).repeat(n)
	del cl
	# Construct dl extended (whole array is repeated n times)
	dle = numpy.zeros((n*n,), int)
	for i in xrange(n): dle[i*n:(i+1)*n] = dl
	del dl
	# Construct cdl - sorted list of all negated sums of a, b for a, b in
cl, dl
	cdl = numpy.sort(-(cle + dle))
	del cle, dle

	# Iterate over arrays, count matching elements
	result = 0
	i, j = 0, 0
	n = n*n
	try:
		while True:
			while abl[i] < cdl[j]:
				i += 1
			while abl[i] > cdl[j]:
				j += 1
			if abl[i] == cdl[j]:
				# Found matching sequences
				ii = i + 1
				while ii < n and abl[ii] == abl[i]: ii += 1
				jj = j + 1
				while jj < n and cdl[jj] == cdl[j]: jj += 1
				result += (ii - i)*(jj - j)
				i, j = ii, jj
	except IndexError:
		pass

	return result

t = time.clock()
print count_zero_sums(*parse_input())
print time.clock() - t



From MonkeeSage at gmail.com  Sat Mar  3 22:40:29 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 19:40:29 -0800
Subject: pop method question
In-Reply-To: <mailman.4638.1172976888.32031.python-list@python.org>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
Message-ID: <1172979629.812957.156820@i80g2000cwc.googlegroups.com>

Nick,

In regards to stack-like objects, pop() implies mutation of the
reciever and returning the item 'popped' off the stack. The same
_semantic_ meaning can be used for pop() regarding dictionaries, even
though the _implementation_ would be different: dict.pop(key) mutates
the reciever and returns the value associated with the key.

Regards,
Jordan



From wescpy at gmail.com  Thu Mar 22 14:36:17 2007
From: wescpy at gmail.com (wesley chun)
Date: Thu, 22 Mar 2007 11:36:17 -0700
Subject: [ANN] Python courses this Spring
In-Reply-To: <78b3a9580703221134s14d026ebgd59d1af30fb4f5c5@mail.gmail.com>
References: <78b3a9580703221134s14d026ebgd59d1af30fb4f5c5@mail.gmail.com>
Message-ID: <78b3a9580703221136v15c9b4a9q892a228a32486053@mail.gmail.com>

I'll be giving a variety of Python courses this Spring.  Daytime
courses are for visitors and locals who need Python training in the
shortest amount of time possible via consecutive workdays.  Python is
certainly gaining momentum as our February course filled up
completely!  Although I had planned on scheduling the same set to be
taught in November, it is likely that these May daytime sessions are
the last ones of 2007.

In contrast, I'm experimenting with a *weekly evening* course in
Silicon Valley designed mainly for locals.  It represents a viable
alternative to those who cannot take time off during the week as well
as being more budget-friendly, as I am partnering with a local
community college (Foothill) to offer this course.  Class takes place
on the main campus and you must register through the college to
attend.

For more information, such as cost and other course details, see the
corresponding websites below. Contact me privately if you have any
more questions.

cheers,
-wesley

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

DAYTIME
=======
- (Intensive) Introduction to Python (Mon-Wed, May 14-16)
- Advanced Python Programming (Wed-Fri, May 16-18)
- Advanced Python (short course; Thu-Fri, May 17-18)
- Core Python (Intro+Advanced combo; Mon-Fri, May 14-18)

These courses run daily 9a-5p and will take place in San Bruno right
near the San Francisco International Airport at the:

Staybridge Suites - San Francisco Airport
1350 Huntington Ave
San Bruno, CA  94066 USA
http://www.ichotelsgroup.com/h/d/sb/1/en/hd/sfobr

Discounts are available for students and teachers, as well as multiple
registrations from those working at the same company.  For more info
and registration, go to http://cyberwebconsulting.com (click on
"Python Training")

LOCALS: free parking and 101/280/380 access, BART across the street
and CalTrain down the road (San Bruno stations)

VISITORS: free hotel shuttle to/from the San Francisco airport, lots
of free food and wireless, 2-bedroom suites w/private baths and a
common work/living area available for traveling coworkers, and of
course, The City by the Bay
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

EVENING
=======
- Intermediate Python Programming (Tues, Apr 10-Jun 26)

This course will cover the same topics as the advanced course above as
well as critical portions of the intensive introductory course. It
will be held once a week on Tuesday evenings from 6-9:40p.

Foothill College
12345 El Monte Road
Los Altos Hills, CA  94022 USA
(right off 280, just south of Stanford)

http://www.foothill.edu/schedule/schedule.php
search for CIS 68L for Spring Quarter 2007


From stargaming at gmail.com  Mon Mar  5 12:00:04 2007
From: stargaming at gmail.com (Stargaming)
Date: Mon, 05 Mar 2007 18:00:04 +0100
Subject: worker thread catching exceptions and putting them in queue
In-Reply-To: <45ec4936$0$323$e4fe514c@news.xs4all.nl>
References: <45ec4936$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <eshiao$1vpe$1@ulysses.news.tiscali.de>

Paul Sijben schrieb:
> All,
> 
> in a worker thread setup that communicates via queues is it possible to
> catch exceptions raised by the worker executed, put them in an object
> and send them over the queue to another thread where the exception is
> raised in that scope?
> 
> considering that an exception is an object I feel it ought to be
> possible, however I do not see how to go about it.
> 
> does anyone have a pointer towards the solution?
> 
> Paul

You're right, even exceptions are objects in Python. For further 
studies, read http://docs.python.org/lib/module-exceptions.html

You can catch an exception like this:
try:
   worker.do_some_work_that_may_raise_an_exception()
except Exception, e:
   # the first argument is the type of error you want to handle
   # it is Exception here, the baseclass of all computation exceptions
   # the second argument is the variable (name) where you want to save
   # the specific exception raised to
   # it's 'e' here, a common shortcut for exception
   exception_handler.handle(e)
   # notice that you can pass e around as you like

For further information on exceptions and how to handle them, read 
chapter 8 of the tutorial, especially starting from 8.3: 
http://docs.python.org/tut/node10.html#SECTION0010300000000000000000

P.S. I don't know if what I told still applies to Python 3.0 -- a lot of 
changes are upcoming related to exception raising and handling.


From http  Sat Mar 10 19:47:11 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 16:47:11 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
Message-ID: <7xbqj01u9c.fsf@ruckus.brouhaha.com>

"MonkeeSage" <MonkeeSage at gmail.com> writes:
> Taking your comment and running with it...this is pretty much
> cheating, and requires that M be evenly divisible by N, and only works
> well with smaller N values, and selections are limited to numbers in
> the 1 to (M/N)+(M/N) range...but hey; other than that it's perfect, heh.

This still doesn't make terribly much sense in terms of the distribution
you get.

The fencepost method still seems to be simplest:

    t = sorted(random.sample(xrange(1,50), 4))
    print [(j-i) for i,j in zip([0]+t, t+[50])]


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 00:59:20 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 01:59:20 -0300
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
Message-ID: <op.tpmlg6jix6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 07:07:20 -0300, Jon Ribbens  
<jon+usenet at unequivocal.co.uk> escribi?:

> In article <etpcon$1g8r$1 at ulysses.news.tiscali.de>, Stargaming wrote:
>> from sys import version_info
>> if version_info[0] < 2 or version_info[1] < 4:
>>      raise RuntimeError("You need at least python2.4 to run this  
>> script")
>
> That'll fail when the major version number is increased (i.e. Python  
> 3.0).
>
> You want:
>
>   if sys.hexversion < 0x020400f0:
>     ... error ...

(what means the final f0?) I find a lot easier to use (and read) this:

if sys.version_info < (2,4):
	raise RuntimeError("You need at least python2.4...")

(Does the f0 account for the prereleases?)
-- 
Gabriel Genellina



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 11 08:16:52 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 13:16:52 +0100
Subject: a better solution for GUI in python
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <55ia9kF24d6qgU1@mid.individual.net>

ce wrote:
> My question is which solution would be better for the GUI (and
> easier to implement)? I knew there are something like wxidgets,

(wxWidgets. It's the C++ lib, its Python bindings are wxPython)

> QT 

(same as above, it's called pyQt. Check licensing, it's not as
liberal as the others'.)

> and pyGTK? actually we will need some complicated stuff in the GUI
> and yet I don't know much about GUI programming.
> 
> Any recommendation guys?

Mostly matter of taste. Without any further details of your needs,
no experienced people will be able to help.

Why don't you go to the projects' homepages and read, and perhaps
check a tutorial.

Though biased, this may help:

http://www.wxwidgets.org/wiki/index.php/WxWidgets_Compared_To_Other_Toolkits

(it's for the C++ original only, but much applies to python
bindings)

Regards,


Bj?rn

-- 
BOFH excuse #137:

User was distributing pornography on server; system seized by FBI.



From f98dawa at dd.chalmers.se  Mon Mar  5 07:36:01 2007
From: f98dawa at dd.chalmers.se (Dag)
Date: Mon, 5 Mar 2007 12:36:01 +0000 (UTC)
Subject: Python GUI + OpenGL
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
	<54r59qF228m8bU1@mid.uni-berlin.de>
Message-ID: <slrneuo3lh.bth.f98dawa@shii.medic.chalmers.se>

On Fri, 02 Mar 2007 18:30:34 +0100, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Achim Domma wrote:
>
>> Hi,
>> 
>> I'm developing a GUI app in Python/C++ to visualize numerical results.
>> Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there
>> are no windows binaries for Python 2.5 for quite some time now.
>> 
>> I need a OpenGL context without restrictions and some settings dialogs.
>> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set
>> of tools/libs?
>
> PyQt, but then there is the licensing question of course.

I'm facing a similar problem.  Would you care to explain why PyQt is
better in this particular case.  I've used both PyQt and wx for 'normal'
GUI programming (but I'm more familiar with wx) so I know about their
difference in general.  But why is PyQt better than wx for working with
OpenGL?

Dag


From anna.me at gmail.com  Fri Mar 23 05:29:11 2007
From: anna.me at gmail.com (Vixen)
Date: 23 Mar 2007 02:29:11 -0700
Subject: Free backlinks & promotion of your site
Message-ID: <1174642151.491584.198050@e65g2000hsc.googlegroups.com>


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backlink their site in keyword rich content.

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promotional site articles.

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From n00m at narod.ru  Thu Mar 15 18:42:03 2007
From: n00m at narod.ru (n00m)
Date: 15 Mar 2007 15:42:03 -0700
Subject: To count number of quadruplets with sum = 0
Message-ID: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>

http://www.spoj.pl/problems/SUMFOUR/

3
0 0 0 0
0 0 0 0
-1 -1 1 1
Answer for this input data is 33.

My solution for the problem is
======================================================================

import time
t = time.clock()

q,w,e,r,sch,h = [],[],[],[],0,{}

f = open("D:/m4000.txt","rt")

n = int(f.readline())

for o in range(n):
  row = map(long, f.readline().split())
  q.append(row[0])
  w.append(row[1])
  e.append(row[2])
  r.append(row[3])

f.close()

for x in q:
  for y in w:
    if h.has_key(x+y):
      h[x+y] += 1
    else:
      h[x+y] = 1

for x in e:
  for y in r:
    sch += h.get(-(x+y),0)

q,w,e,r,h = None,None,None,None,None

print sch
print time.clock() - t

===============================================================

Alas it gets "time limit exceeded".
On my home PC (1.6 GHz, 512 MB RAM) and for 4000 input rows it
executes ~1.5 min.
Any ideas to speed it up say 10 times? Or the problem only for C-like
langs?



From lixianmin at gmail.com  Tue Mar 27 00:17:54 2007
From: lixianmin at gmail.com (=?UTF-8?B?5p2O546w5rCR?=)
Date: Tue, 27 Mar 2007 12:17:54 +0800
Subject: enumerating processes
Message-ID: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>

hi ,all
   any one knows how to enumerate the current running processes , or how to
obtain a specific process by its name or process id. I know I can do this in
many  programming languages , but how in python? any one know?
 Thanks for any guidance.

-- 
li xianmin

           lixianmin at gmail.com
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From soyrush at gmail.com  Sat Mar 24 21:00:34 2007
From: soyrush at gmail.com (Rodrigo Lopez-Negrete)
Date: 24 Mar 2007 18:00:34 -0700
Subject: "persistent" plot windows
In-Reply-To: <GHjNh.3040$Kd3.1944@newssvr27.news.prodigy.net>
References: <1174779770.134013.256280@b75g2000hsg.googlegroups.com>
	<GHjNh.3040$Kd3.1944@newssvr27.news.prodigy.net>
Message-ID: <1174784434.617961.49790@p15g2000hsd.googlegroups.com>

Hi James,

Thanks for the answer, the ampersand only works if I use the show()
command at the end of my script. I guess that helps although I haven't
tested it with plotting subroutines.

cheers,
  Rodrigo

On Mar 24, 6:50 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> Rodrigo Lopez-Negrete wrote:
> > Hi all,
>
> > I'm trying to write a python script using plotting form pylab.
> > Unfortunatelly I've encountered a problem. When I run the script via
> > 'python myscript.py' the plot windows open and close very quickly, or

> > when I added the show() command the shell window was locked until I
> > closed the figures.
>
> > My question is: is there a way to open those windows in the background
> > without blocking the shell and without running it interactively??
> > something like gnuplot -persist?
>
> > Thanks all,
> >   Rodrigo Lopez-Negrete
>
> python whatever.py &
>
> (Don't forget the ampersand!)
>
> James




From fredrik at pythonware.com  Mon Mar 19 10:46:55 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 19 Mar 2007 15:46:55 +0100
Subject: class objects, method objects, function objects
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
Message-ID: <etm7p0$jl7$1@sea.gmane.org>

"7stud" wrote:
> But the last part of the passage makes no sense to me:
> ------
> When the method object is called with an argument list, it is unpacked
> again, a new argument list is constructed from the instance object and
> the original argument list, and the function object is called with
> this new argument list.
> ------
> Can anyone interpret that for me?

when you call obj.method(arg1, arg2), Python prepends the actual instance
object (obj) to the argument list, so you end up calling (obj.method) with the
arguments (obj, arg1, arg2).

</F> 





From dartsch at dicad.de  Sun Mar 25 06:59:52 2007
From: dartsch at dicad.de (dartsch at dicad.de)
Date: 25 Mar 2007 03:59:52 -0700
Subject: Strange behavior when printing a returned closure function
Message-ID: <1174820392.652008.123550@y80g2000hsf.googlegroups.com>

Hello,

when I execute the following code (python 2.5)

def f(x):
    def g():
        return x
    return g

print f(1)
print f(2)

I get an output like

<function g at 0x00AFC1F0>
<function g at 0x00AFC1F0>

So according to print I get the same function object returned at both
calls.
That's surprising, I would expect to get two distinct function objects
because their func_closure attribute has to be different. And indeed,
if I do

print f(1) is f(2)

instead, it prints False. Even more confusing, if I do

g1 = f(1)
g2 = f(2)
print g1
print g2

I get something like

<function g at 0x00AFC1B0>
<function g at 0x00AFC1F0>

ie. two distinct function objects are printed.

What's happening here?
Some clever optimization reusing function objects in special cases or
what ...?

Thomas



From aleax at mac.com  Tue Mar 20 11:11:26 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 08:11:26 -0700
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<mailman.5284.1174321784.32031.python-list@python.org>
	<1hv8wz8.19mj0kb1k9m2m8N%aleax@mac.com>
	<etomjn$lo9$1@panix3.panix.com>
Message-ID: <1hv9kdf.1vamq9cb1ea91N%aleax@mac.com>

Aahz <aahz at pythoncraft.com> wrote:

> In article <1hv8wz8.19mj0kb1k9m2m8N%aleax at mac.com>,
> Alex Martelli <aleax at mac.com> wrote:
> >
> >list(iterimage(etc etc))
> >
> >is surely a better way to express identical semantics.  More generally,
> >[x for x in whatever] (whether x is a single name or gets peculiarly
> >unpacked and repacked like here) is a good example of inappropriate LC,
> >to get back to the question in the subject: list(whatever) is the "one
> >obvious way" to perform the same task.
> 
> Except of course, when it's
> 
> [x for x in whatever if x]
> 
> I'm exceedingly fond of replacing filter() with listcomps.  They're so
> much more readable and often faster.

Sure, if there are other clauses in the LC (be they for or if ones) you
can't just call list(...) -- and I do entirely agree that filter can be
put out to pasture.  Similarly, you need the LC if you're performing
some processing on the items -- for example, if you have an iterator
yielding pairs,
  [(y,x) for x,y in whatever]
you do need the unpacking and repacking to achieve this swapping of
items within each pair -- what I was pointing out was re the simpler and
most common case:
  [(x,y) for x,y in whatever]
no processing needed, no if clauses, etc, and thus better expressed as
  list(whatever)


Alex


From duncan.booth at invalid.invalid  Mon Mar 19 15:24:48 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 Mar 2007 19:24:48 GMT
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
Message-ID: <Xns98F8C5768B0A4duncanbooth@127.0.0.1>

"Ben" <bensherman at gmail.com> wrote:

> What's the most "pythony" way to do this:
> 
> even = []
> for x in range(0,width,2):
>     for y in range(0,height,2):
>         color = im.getpixel((x,y))
>         even.append(((x,y), color))
> 
> versus list comprehension:
> 
> even2 = [((x,y), im.getpixel((x,y))) for x in range(0,width,2) for y
> in range(0,height,2)]
> 
...
> 
> Feel free to tell me a different way to do this, as well.
> 

Untested code, but I would try to avoid calling getpixel:

data = list(im.getdata())
width, height = im.size
even = [ data[i:i+width:2] for i in range(0, width*height, 2*width)]

That creates a 2 dimensional list rather than one long list, and doesn't 
create the x,y tuples, but since they are implied by the position in the 
list I don't actually see why you would want to create them at all. You can 
calculate them separately if you actually need them.


From irmen.NOSPAM at xs4all.nl  Wed Mar 21 14:23:35 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Wed, 21 Mar 2007 19:23:35 +0100
Subject: replace illegal xml characters
In-Reply-To: <1174482222.951043.27070@y80g2000hsf.googlegroups.com>
References: <1174464899.057656.177410@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.09.39.56.10295@gmx.net>
	<1174482222.951043.27070@y80g2000hsf.googlegroups.com>
Message-ID: <4601785e$0$334$e4fe514c@news.xs4all.nl>

killkolor wrote:
>> Does InDesign export broken XML documents?  What exactly is your problem?
> 
> yes, unfortunately it does. it uses all possible unicode characters,
> though not all are alowed in valid xml (see link in the first post).

Are you sure about this? Could you post a small example?

If this is true, don't forget to file a bug report with Adobe too.

--Irmen


From hg at nospam.org  Tue Mar 27 15:35:11 2007
From: hg at nospam.org (hg)
Date: Tue, 27 Mar 2007 21:35:11 +0200
Subject: socket read timeout
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
	<mailman.5668.1175003334.32031.python-list@python.org>
	<VegOh.15507$nh4.13055@newsfe20.lga>
	<mailman.5688.1175034299.32031.python-list@python.org>
Message-ID: <MukOh.12989$Ng1.10639@newsfe19.lga>

Facundo Batista wrote:

> hg wrote:
> 
>> Do you mean use select ?
> 
> No, socket's timeout:
> 
>>>> import socket
>>>> s = socket.socket()
>>>> s.settimeout(5)
>>>> ...
> 
> Regards,
> 
> --
> .   Facundo
> .
> Blog: http://www.taniquetil.com.ar/plog/
> PyAr: http://www.python.org/ar/


My issue with that is the effect on write: I only want a timeout on read ...
but anyway ...

Thanks,

hg




From arkanes at gmail.com  Tue Mar  6 14:31:38 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 13:31:38 -0600
Subject: Project organization and import
In-Reply-To: <1173207494.053325.100540@p10g2000cwp.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
	<mailman.4723.1173201596.32031.python-list@python.org>
	<1173203395.649560.249930@p10g2000cwp.googlegroups.com>
	<mailman.4725.1173205228.32031.python-list@python.org>
	<1173207494.053325.100540@p10g2000cwp.googlegroups.com>
Message-ID: <4866bea60703061131q375d4ba8la57a1d08ac6f79b4@mail.gmail.com>

On 6 Mar 2007 10:58:14 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 6, 10:13 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > You have to reload the importing module as well as the module that
> > changed. That doesn't require rewriting the import infrastructure.
>
> As far as I can tell, the moment you use "from foo_module import bar",
> you've broken reload(). Reloading higher level packages doesn't help.
> The only practical solution I can see is to rewrite __import__ and
> reload.
>

Example:

a.py
AExport = object()

b.py
from a import AExport

class Object(object): pass

BExport = Object()
BExport.a = AExport

interpreter session:

>>> import b
>>> b.AExport
<object object at 0x009804A8>
>>> b.BExport.a
<object object at 0x009804A8>
>>> import a
>>> a.AExport
<object object at 0x009804A8>
>>> "changed a.py such that AExport = list()"
'changed a.py such that AExport = list()'
>>> reload(b)
<module 'b' from 'b.pyc'>
>>> b.AExport
<object object at 0x009804A8>
>>> "note no change"
'note no change'
>>> reload(a)
<module 'a' from 'a.py'>
>>> b.AExport
<object object at 0x009804A8>
>>> "note still no change"
'note still no change'
>>> reload(b)
<module 'b' from 'b.pyc'>
>>> b.AExport
[]
>>> "now its changed"
'now its changed'
>>> b.BExport.a
[]
>>>


From aleax at mac.com  Tue Mar 20 11:33:28 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 08:33:28 -0700
Subject: Load three different modules which have the same name
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
	<mailman.5300.1174338208.32031.python-list@python.org>
	<1174387253.412138.124830@d57g2000hsg.googlegroups.com>
	<mailman.5331.1174388512.32031.python-list@python.org>
Message-ID: <1hv9m99.wrjdaa1l5era9N%aleax@mac.com>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
   ...
> > example i could load Person from Person (in alpha) as, "Person_Alpha"
> > or something like that in sys.modules?  not sure how I might do that.
> 
> Use the "as" clause when importing; it's almost the same phrase you wrote
> above:
>  from alpha.Person import Person as Person_Alpha
> or something like that.
> alpha should be a package, as someone already said.

Right, but the as clause does NOT affect sys.modules -- the entry in
sys.modules will still be sys.modules['alpha.Person'].  I doubt this
matters, but since the OP had very specifically askd about "in
sys.modules" I thought it better to clarify.

If you want to make fake entries in sys.modules you need to do that
explicitly,importing sys and assigning to the entry:

    sys.modules['veryweird'] = extremely_tricky_stuph

The only purpose of that is to "fool" future "import veryweird"
statements (executed under any circumstances) to use said extremely
tricky stuph.  NOT recommended unless you know what you're doing.


Alex


From skip at pobox.com  Mon Mar 26 08:46:14 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 26 Mar 2007 07:46:14 -0500
Subject: Calling Queue experts
In-Reply-To: <1174904972.597317.27240@e65g2000hsc.googlegroups.com>
References: <1174899202.355092.209590@l75g2000hse.googlegroups.com>
	<1174904972.597317.27240@e65g2000hsc.googlegroups.com>
Message-ID: <17927.49302.950988.200965@montanaro.dyndns.org>


    jrpfinch>                 # Some other I/O problem, reraise error
    jrpfinch>                 raise err

I'd just execute a bare raise (without err).  That way the caller gets the
stack trace of the actual IOError.

Skip


From paddy3118 at googlemail.com  Fri Mar 30 01:59:12 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 29 Mar 2007 22:59:12 -0700
Subject: PyPy for dummies
In-Reply-To: <460c5515$0$90269$14726298@news.sunsite.dk>
References: <460c5515$0$90269$14726298@news.sunsite.dk>
Message-ID: <1175234352.463435.36720@n76g2000hsh.googlegroups.com>

On Mar 30, 1:10 am, Damjan <gdam... at gmail.com> wrote:
> .. like me.
>
> Ok, this is what I understood why PyPy is important.
>
> Writing programing languages and implementations (compilers, interpreters,
> JITs, etc) is hard. Not many people can do it from scratch and create
> something comparable to what's available today. But we need people with new
> aproaches, exploring new ideas (to boldly go where no hacker has gone
> before).
>
> Also, evolving the current Python language and implementation is not easy
> either. As it becomes more complex, it's hard for newcomers to comprehend
> it as a whole, and as it is still harder and harder to work on details
> without understanding the whole.
>
> What PyPy provides is, making this easier, thus allowing for:
> *rapid turnaround* of language features and implementation details - this
> enables easier experimentation and testing of wild ideas. Most of them will
> fail of course, but some will succed and some will succed and suprise
> (NOBODY expects the Spanish Inquisition!).
>
> So that's how I see PyPy ... at the same time an interesting - let's call
> it - academic experiment, but also something very close to beeing usefull
> at the level of the current CPython.
>
> --
> damjan

It is also European funding for an open source project with sprints.
I'm sure some eurocrat will be dissecting the project to see if it is
aa good way to fund technical projects.

- Paddy.



From steve at REMOVEME.cybersource.com.au  Wed Mar  7 23:07:52 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 08 Mar 2007 15:07:52 +1100
Subject: Bug in python!? persistent value of an optional parameter in
	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
Message-ID: <pan.2007.03.08.04.07.49.661894@REMOVEME.cybersource.com.au>

On Thu, 08 Mar 2007 03:14:53 +0000, John Nagle wrote:

> Paul Rubin wrote:
>> "C Barr Leigh" <cpblPublic at gmail.com> writes:
>> 
>>>Help! Have I found a serious bug?
>>>This seems like highly undesired behaviour to me. From the program
>>>below, I get output:
>> 
>> 
>> It is intentional, not a bug, see the docs.  Whether it's desirable is
>> a different question.
> 
>     True.  It would make sense to disallow mutable values as
> initial values for optional arguments.  The present behavior
> is silly.

It's just *different*, not silly.

It's also quite useful in some circumstances, e.g. cheap caching without
using a global variable.

def factorial(n, _cache={}):
    try:
       return _cache[n]
    except KeyError:
       # fall back to slow calculation
       if n <= 1:
           result = 1
       else:
           result = factorial(n-1)*n
       _cache[n] = result
       return result

There are other ways of implementing caches, but this is quick and easy
and works well for many functions.


-- 
Steven D'Aprano 



From johnjsal at NOSPAMgmail.com  Thu Mar 22 11:34:31 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 22 Mar 2007 11:34:31 -0400
Subject: Been a while...
Message-ID: <4602a1be$0$32400$c3e8da3@news.astraweb.com>

Hi guys. It's been a while since I've used Python, so I got a little 
rusty, but I really want to start using it again, just out of habit and 
for fun. Can anyone suggest a book or a website with little projects I 
could work on to keep me busy?

(I do have Beginning Python with the 10 projects in the back, but those 
might be a little too involved for me right now.)

Thanks!
John


From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:53:11 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:53:11 -0300
Subject: File extension
References: <cf14220703161559s1d106d03gd02bac4c0d695506@mail.gmail.com>
Message-ID: <op.tpbcqmtsx6zn5v@gabriel2>

En Fri, 16 Mar 2007 19:59:09 -0300, Anil Kumar <anilkum.tech at gmail.com>  
escribi?:

> But when I try a python script with extension .sh in windows, the file is
> not getting recognized by the Python interpreter. Is this supported? Or  
> is
> there any way we can achieve the same?

C:\TEMP>type test.sh
print "Hello!"

C:\TEMP>python test.sh
Hello!

For a *script* that you run explicitely, Python doesn't care of the  
extension. But a *module* (used with the import statement) must be a  
.py/.pyc/.pyo
Also, if you run the script with: python scriptname.sh, it's ok; but if  
you run it just using: scriptname.sh, won't work; Windows uses the file  
extension to determine the program to run, instead of the !# line.

> The reason I am trying to change the extension is, it reduces lot of  
> porting
> changes. No need to go to each of our file which were referencing .sh  
> file
> before and change it to .py.

I assume you're not using Cygwin - you can create a stub version of each  
script, so that foo.sh contains: python foo.py, and associate .sh  
extension with cmd.exe

-- 
Gabriel Genellina



From tiedon_jano at hotmail.com  Tue Mar  6 12:31:31 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 06 Mar 2007 17:31:31 GMT
Subject: askstring Window to the top under Windows
In-Reply-To: <1173194286.807112.180370@c51g2000cwc.googlegroups.com>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<1173188906.327302.291650@s48g2000cws.googlegroups.com>
	<1173194286.807112.180370@c51g2000cwc.googlegroups.com>
Message-ID: <TzhHh.193$c62.95@read3.inet.fi>

iwl kirjoitti:
> On 6 Mrz., 14:48, "Tim Golden" <tjgol... at gmail.com> wrote:
>> On Mar 6, 1:13 pm, "iwl" <Ingo.W... at gmx.de> wrote:
>>
>> It's not clear whether you're talking about the usual
>> "Why do I get a DOS window when I run my python script?"
>> question -- to which the answer is, in essence, change
>> your script's extension to .pyw or use the pythonw.exe
>> executable -- or "Why _when I use askstring_ do I get
>> an empty window?". If it's the latter, then I don't
>> know, but can you provide a small example script which
>> exhibits the behaviour.
>>
>> TJG
> 
>>>> import tkSimpleDialog
>>>> tkSimpleDialog.askstring("a","b")
> 
> at the python Console under XP (not pythonw).
> 
> -> instead of only showing the Inputwindow at the top,
> some additional empty window is shown, both not on top.
> 

I assumed that by "python Console" you mean the IDLE editor/interpreter.
I entered your 2 lines and the behaviour is the same on Win XP. I doubt 
it has nothing to do with the OS, though.

(A word of warning but don't tell anyone: I've never used Tkinter, I use 
wxPython!)

Every GUI implementation has a command loop and things to initiate the 
correct execution environment. I think that's what you are missing here 
and that's causing the odd behaviour.

I found an example (16.1.2.2 A Simple Hello World Program) in Python 2.4 
and modified as shown:

#===============================================
from Tkinter import *
import tkSimpleDialog # <<<=== modification here

class Application(Frame):
     def say_hi(self):
         print "hi there, everyone!"

     def createWidgets(self):
         self.QUIT = Button(self)
         self.QUIT["text"] = "QUIT"
         self.QUIT["fg"]   = "red"
         self.QUIT["command"] =  self.quit

         self.QUIT.pack({"side": "left"})

         self.hi_there = Button(self)
         self.hi_there["text"] = "Hello",
         self.hi_there["command"] = self.say_hi

         self.hi_there.pack({"side": "left"})

     def __init__(self, master=None):
         Frame.__init__(self, master)
         self.pack()
         self.createWidgets()

root = Tk()
app = Application(master=root)
app.mainloop()
tkSimpleDialog.askstring("a","b") # <<<=== modification here
root.destroy()
#===============================================

If you run it, it first shows the "Hello dialog" and after clicking the 
QUIT button, your askstring gets run.

So: nothing wrong with Python, Tkinter or tkSimpleDialog.askstring.
Just carry on having fun with Python!

HTH,
Jussi


From kyosohma at gmail.com  Fri Mar 23 09:29:07 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 06:29:07 -0700
Subject: Catching an unknown error
In-Reply-To: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
Message-ID: <1174656547.825228.54240@e65g2000hsc.googlegroups.com>

On Mar 23, 8:16 am, "Harlin Seritt" <harlinser... at yahoo.com> wrote:
> Using the code below:
>
> ---BEGIN CODE---
>
> value = raw_input("Type a divisor: ")
> try:
>    value = int(value)
>    print "42 / %d = %d" % (value, 42/value)
> except ValueError:
>         print "I can't convert the value to an integer"
> except ZeroDivisionError:
>         print "Your value should not be zero"
> except:
>         print "Something unexpected happened"
>
> ---END CODE---
>
> In the last 'except' block, how can I print out the particular error
> name even though one is not specifically named?
>
> Thanks,
>
> Harlin

Make the last 'except' block like this:

Except Exception, e:
   print e


Mike



From steve at holdenweb.com  Fri Mar 16 09:28:49 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 16 Mar 2007 09:28:49 -0400
Subject: String formatting with fixed width
In-Reply-To: <ete5ec$juo$2@online.de>
References: <ete5ec$juo$2@online.de>
Message-ID: <ete658$9g5$1@sea.gmane.org>

Alexander Eisenhuth wrote:
> Hello alltogether,
> 
> is it possible to format stings with fixed width of let's say 7 character. T 
> need a floating point with 3 chars before dot, padded with ' ' and 3 chars after 
> dot, padded with '0'.
> 
> Followingh is my approach
>  >>> f = 21.1
>  >>> s = "%.03f" % f
>  >>> s
> '21.100'
> 
> But there are missing ' '. How can I get that? (For bigger numbers than 999 they 
> might be cut: 1021 -> 021)
> 
  >>> def f(x):
  ...   return "%7.3f" % (x % 1000.0)
  ...
  >>> for x in (9.9, 99.9, 999.9, 9999.9):
  ...   print f(x)
  ...
   9.900
  99.900
999.900
999.900
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From jan.schilleman at xs4all.nl  Sun Mar 25 18:53:55 2007
From: jan.schilleman at xs4all.nl (Jan Schilleman)
Date: Mon, 26 Mar 2007 00:53:55 +0200
Subject: call to function by text variable
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <eu6uj6$udo$1@sea.gmane.org>

Hi,

try this:
func = getattr(operations, ["Replace", "ChangeCase", "Move"][n])

HTH,
Jan

"ianar?" <ianare at gmail.com> schreef in bericht 
news:1174862186.134912.117270 at p15g2000hsd.googlegroups.com...
> yeah the subject doesn't really make sense does it?
>
> anyway want I want to do is this:
> if n == 1:
>
>    self.operations.insert(pos, operations.Replace.Panel(self, main))
>
> elif n == 2:
>
>    self.operations.insert(pos, operations.ChangeCase.Panel(self,
> main))
>
> elif n == 3:
>
>    self.operations.insert(pos, operations.Move.Panel(self, main))
>
> As you can see all the different functions have the same variables, so
> it would be easier if I could just make a list and use that.
>
> like this:
>
>
> list = ["Replace", "ChangeCase", "Move"]
> textVariable = list[n]
> self.operations.insert(pos, operations.[textVariable].Panel(self,
> main))
>
> Is something sort of like that possible?
>
>
> TIA
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 





From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 10 20:45:00 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 02:45:00 +0100
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<7xr6rwhpdb.fsf@ruckus.brouhaha.com>
	<mailman.4922.1173568136.32031.python-list@python.org>
	<7xhcssllyi.fsf@ruckus.brouhaha.com>
	<mailman.4923.1173571172.32031.python-list@python.org>
	<7xslccr6hb.fsf@ruckus.brouhaha.com>
Message-ID: <55h58sF258g2nU3@mid.individual.net>

Paul Rubin wrote:

> The OP specified that the expected result was 3.

But that's not what he'd get with his C conversion ;)

Regards,


Bj?rn

-- 
BOFH excuse #348:

We're on Token Ring, and it looks like the token got loose.



From http  Wed Mar 14 11:49:29 2007
From: http (Paul Rubin)
Date: 14 Mar 2007 07:49:29 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
	<1173843736.982126.211530@l77g2000hsb.googlegroups.com>
	<pan.2007.03.14.07.02.32.652175@REMOVEME.cybersource.com.au>
	<7xabygti89.fsf@ruckus.brouhaha.com>
	<pan.2007.03.14.08.25.45.281805@REMOVEME.cybersource.com.au>
Message-ID: <7xtzwnbzau.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> If you generate all the possible sets of five numbers between 1 and 50,
> there are 50**5 of them, not 2611.

Yes, the idea is generate only the sets that add up to 50.

> unique_partitions(60, 6) takes 0.8 seconds; unique_partitions(80, 8)
> takes about 25 seconds; unique_partitions(80, 10) takes about 80 seconds,
> and unique_partitions(81, 10) takes over 90 seconds.

Hmm, interesting.  Maybe some more optimization is possible.

> (E.g. unique_partitions(80, 10) returns 533,975 unique lists.
> _partitions(80, 10) gives 3,233,568 non-unique lists.)

Well that's just 6x "inflation" due to duplicates, so I dunno what
else can be done for exhaustive enumeration.  Maybe another approach
to generating the k'th partition is possible.  I'll try to think about
this.


From DierkErdmann at mail.com  Fri Mar  2 11:49:43 2007
From: DierkErdmann at mail.com (DierkErdmann at mail.com)
Date: 2 Mar 2007 08:49:43 -0800
Subject: Sorting strings containing special characters (german 'Umlaute')
In-Reply-To: <es9c2i$bdk$00$1@news.t-online.com>
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>
	<es9c2i$bdk$00$1@news.t-online.com>
Message-ID: <1172854183.478333.220760@j27g2000cwj.googlegroups.com>

On 2 Mrz., 15:25, Peter Otten <__pete... at web.de> wrote:
> DierkErdm... at mail.com wrote:
> > For sorting the letter "?" is supposed to be treated like "Ae",
There are several way of defining the sorting order. The variant "?
equals ae" follows DINDIN 5007 (according to wikipedia); defining (a
equals ?) complies with DIN 5007-1. Therefore both options are
possible.

> The default locale is not used by default; you have to set it explicitly
>
> >>> import locale
> >>> locale.strcoll("?rger", "Beere")
> 1
> >>> locale.setlocale(locale.LC_ALL, "")
> 'de_DE.UTF-8'
> >>> locale.strcoll("?rger", "Beere")
>
> -1

On my machine
>>> locale.setlocale(locale.LC_ALL, "")
gives
        'German_Germany.1252'

But this does not affect the sorting order as it does on your
computer.
>>> locale.strcoll("?rger", "Beere")
yields 1 in both cases.

Thank you for your hint using unicode from the beginning on, see the
difference:
>>> s1 = unicode("?rger", "latin-1")
>>> s2 = unicode("Beere", "latin-1")
>>> locale.strcoll(s1, s2)
1
>>> locale.setlocale(locale.LC_ALL, "")
-1

compared to

>>> s1 = "?rger"
>>> s2 = "Beere"
>>> locale.strcoll(s1, s2)
1
>>> locale.setlocale(locale.LC_ALL, "")
'German_Germany.1252'
>>> locale.strcoll(s1, s2)
1

Thanks for your help.

  Dierk




>
> ['Ara', '\xc3\x84rger', 'Ast']
>
> Peter
>
> (*) German for "trouble"




From flgoms at hotmail.com  Mon Mar 12 11:30:59 2007
From: flgoms at hotmail.com (Fabio Gomes)
Date: Mon, 12 Mar 2007 18:30:59 +0300
Subject: backslashes in lists
Message-ID: <BAY126-W58D674B7E9AF10B677D5DD37D0@phx.gbl>


Nice, Lucas.  But help me again, please. What about "echoing" the list:>>> str(alist).replace('\\\\','\\')"['a', 'b', 'c:\\some\\path']"  Because in my script I'm echoing the list to mount lists into lists, like:>>> list1 = ['name', 'test']>>> list2 = ['path', 'c:\some\path']>>> list = [list1, list2]>>> print list[['name', 'test'], ['path', 'c:\\some\\path']]  That's how it is coded in my script. What do you think. Is it possible to print "list" without the doubled backslash?  Thank again, Lucas.  Date: Mon, 12 Mar 2007 12:15:10 -0300From: lucastorri at gmail.comTo: flgoms at hotmail.comSubject: Re: backslashes in listsCC: python-list at python.orgI don't know how ugly this look like, but { print str(alist).replace('\\\\', '\\') } works...On 3/12/07, 
Fabio Gomes <flgoms at hotmail.com> wrote:





Yes, Luca.  I noticed that printing the list item will show the string as expected. But I need to print the entire list in the script I'm writing and doing that, the list will will be repr()'ed. Is there any way to print the entire list without being parsed by repr()?

 Date: Mon, 12 Mar 2007 12:00:19 -0300From: 
lucastorri at gmail.comTo: flgoms at hotmail.comSubject: Re: backslashes in listsCC: 
python-list at python.orgThe backslash is a key to enter especial characters, like breakline: '\n'There is two backslashes cause of this especial condition of this char, but if you try print the specific string you will see that only one backslash remain:
print alist[2]On 3/12/07, Fabio Gomes <flgoms at hotmail.com> wrote:






Hi list,  I'm trying to use a string with backslashes in a list. But Python parses strings in lists with repr().>>> alist = ['a', 'b', 'c:\some\path']>>> alist
['a', 'b', 'c:\\some\\path']>>> print alist['a', 'b', 'c:\\some\\path']  I already tried str() and raw (r) but it didn't work. All I want is to keep a single backslash in the string since it is a path information.
  Can anyone help me, please?  Thank you.O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na Web e sua rede amigos. 

Confira!
--http://mail.python.org/mailman/listinfo/python-list


Busque em qualquer p?gina da Web com alta prote??o. Obtenha o Windows Live Toolbar GRATUITO ainda hoje! 
Experimente agora!
--http://mail.python.org/mailman/listinfo/python-list


_________________________________________________________________
O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na Web e sua rede amigos.
http://spaces.live.com/signup.aspx
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From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:53:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:53:14 -0300
Subject: lock problem
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
	<b8upc4-cq2.ln1@www.researchut.com>
Message-ID: <op.tpbdkcsvx6zn5v@gabriel2>

En Fri, 16 Mar 2007 04:40:27 -0300, Ritesh Raj Sarraf <rrs at researchut.com>  
escribi?:

> Leo Kislov wrote:
>
>> You're changing environmental variable __kabc_ldap that is shared
>> between your threads. Environment is not designed for that kind of
>> usage, it was designed for settings. Either use an option to set
>> output file or just redirect stdout. If the interface of ldapsearch is
>> so lame that it requires environmental variable use env to set the
>> variable: "env __kabc_ldap=/tmp/wrjhdsf ldapsearch ..."
>
> The environment variable is set with temp_file_name which gets the name  
> from
> tempfile.mkstemp(), which is run in every thread. So I don't think the
> environment variable is going to be the same.

But the environment is global for all threads.
I don't know how ldapsearch works, but can't you pass it an additional  
argument, instead of setting an environment variable? From the long  
commandline you're building, I bet it has a suitable option.
Or, instead of os.system, use subprocess.Popen, wich lets you specify the  
new environment of the child process.

-- 
Gabriel Genellina



From DustanGroups at gmail.com  Sun Mar 18 08:17:53 2007
From: DustanGroups at gmail.com (Dustan)
Date: 18 Mar 2007 05:17:53 -0700
Subject: Private data
In-Reply-To: <mailman.5244.1174213592.32031.python-list@python.org>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<mailman.5244.1174213592.32031.python-list@python.org>
Message-ID: <1174220273.356129.222080@n76g2000hsh.googlegroups.com>

On Mar 18, 5:26 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sat, 17 Mar 2007 13:31:01 -0300, Dustan <DustanGro... at gmail.com>
> escribi?:
>
> >http://dustangroups.googlepages.com/privateattributesinpython
>
> > This is something that I just threw together this morning, after a
> > eureka moment. It's a way of creating private class attributes and
> > static function variables (I'm not 100% sure if that's the correct
> > terminology, but you get what I mean). I haven't tried to create
> > private instance attributes, mainly because it would just be too
> > difficult, and it would be awful syntax. I'm not considering actually
> > using this, but I do have a couple questions about it.
>
> I feel so dumb, but I can't see how to use it, or what's for. Perhaps an
> example?
>
> --
> Gabriel Genellina

There are two examples - one demonstrating static function variables
and one demonstrating private class attributes. Both perform some kind
of counting. The function returns how many times it's been called.
Here it is:

@PrivateDataEngine(numCalls = 0)
def testPrivateStaticFunctionVariables(internalData):
    """returns the number of times this function has been called."""
    internalData.numCalls += 1
    return internalData.numCalls

There's a comment explaining how the decorator works on the page I
linked you to.

A common pythonic workaround for this is something like this:

def testMutableDefaultArgs(_cache = {'internalData':0}):
    """returns the number of times this function has been called."""
    _cache['internalData'] += 1
    return _cache['internalData']

The default argument only gets evaluated once, and since it's mutable
and being modified in the function, it magically becomes
{'internalData':1} after 1 call and {'internalData':1348372} after
1348372 calls.

The other example, explaining private class attributes, has a method
getNumInstances that returns how many instances have been created.
Here that is:

class TestPrivateClassAttributes(object):
    # pca here obviously stands for Private Class Attributes.
    pcaManager = PrivateDataEngine(numInstances = 0)

    # Notice that the internal data is an implicit parameter that
comes first,
    # even before the self parameter.
    @pcaManager
    def __init__(internalData, self):
        internalData.numInstances += 1

    @staticmethod
    @pcaManager
    def getNumInstances(internalData):
        return internalData.numInstances

    # Don't forget to delete the pcvManager, or it will have all been
in vain.
    del pcaManager

I'm thinking this is going to look rather ugly when the text gets
wrapped; that's why I linked to an external page in the first place.

Notice it requires more advanced usage of the PrivateDataEngine if you
want multiple functions to have access to the same data, as you
normally would in a class.

Note also that the double-decorated method getNumInstances requires
that staticmethod be the first decorator. This is equivalent to the
code "getNumInstances = staticmethod(pcaManager(getNumInstances))". I
got an error when I tried it with pcaManager preceding staticmethod,
so my educated guess is that staticmethods are somehow specially
recognized by the class, and therefore they have to actually BE
staticmethods, not dressed over by a pcaManager.

Now that I think of it, for clarity, pcaManager may not have been a
good name for the function returned by PrivateDataEngine; pcaDecorator
would have been better, seeing as it IS a decorator. Perhaps I'll
change that soon.

The pythonic way would be:

class TestPythonsPrivateClassAttributes(object):
    _numInstances = 0

    def __init__(self):
        # class attributes can be accessed from self.
        self.numInstances += 1

    @staticmethod
    def getNumInstances(internalData):
        return self.numInstances

It should immediately stick out as being much more concise
syntactically, and therefore much less bug-prone.

Obviously, these examples are a lot like "Hello, World!" in their
usefulness; one would very rarely want to track how many times a
function has been called.

Hope that helps.



From paddy3118 at googlemail.com  Mon Mar 12 01:35:25 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 11 Mar 2007 22:35:25 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <1173653364.059431.19990@v33g2000cwv.googlegroups.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
Message-ID: <1173677725.341019.270100@j27g2000cwj.googlegroups.com>

On Mar 11, 10:49 pm, "Paddy" <paddy3... at googlemail.com> wrote:
> On Mar 11, 9:28 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>
> > Dennis Lee Bieber <wlfr... at ix.netcom.com> writes:
>
> > >    Pardon? What is "the right thing with signed zeros"... In the last
> > > 30 years I've been on machines that normalize floating zero into a true
> > > zero (all bits are zero: mantissa, exponent, and sign). This is the
> > > first time I've even seen a variable output as a negative 0.0!
>
> > Most machines these days use IEEE 754 which supports negative zero.
>
> >http://en.wikipedia.org/wiki/Negative_zero
>
> Isn't negative zero mathematically the same as zero? Isn't -0 just an
> artefact of the representation of floating point numbers? Shouldn't
> f(0) == f(-0) for all functions f?
> I read the wikipedia article about meteorologists using -0 to denote a
> negative number rounded to zero for the purposes of binning, i.e. if
> you want to tally days with temperature above and below zero, but it
> doesn't seem right. You should arrange for any temperature to be in
> only one range and record temperatures to their determined accuracy. a
> temperature of zero would only be in one bin and if a temperature is
> read as -0.2 and th rounding says it should be taken as zero then it
> should go in the same bin as any positive reading that is rounded to
> zero.
> Getting back to Python, shouldn't we strive to remove any distinction?
> a zero is a zero regardless of sign and a function like atan returning
> one of two different vaues for an argument of zero is actually
> mathematically not a bad thing to do?
>
> - Paddy.

A big thanks to Paul and Andre,
I think I have it now. The OP is investigating multivalued functions
where the function converges to different values when approached from
different directions. Floating point arithmetic being a best
compromise solution to the rational number system, distinguishes
between zero and minus zero as an important part of the compromise.
The OP wants to compute a function of zero and minus zero distinctly
and is hampered by Python not preserving the zero/minus zero
distinction in some cases - hence it being a bug.

Swell, Ta!

- Paddy.

Hey, I'm still learnin'. Sweet!



From danb_83 at yahoo.com  Sat Mar 10 14:38:37 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 10 Mar 2007 11:38:37 -0800
Subject: Formatted Input
In-Reply-To: <1173554949.335778.324720@8g2000cwh.googlegroups.com>
References: <1173554949.335778.324720@8g2000cwh.googlegroups.com>
Message-ID: <1173555516.924984.155470@v33g2000cwv.googlegroups.com>

On Mar 10, 1:29 pm, "Deep" <deepblue... at gmail.com> wrote:
> Hi all,
> I am a newbie to python
> I have an input of form
> <one number> space <another number>
> ie.
> 4 3
> how can i assign these numbers to my variables??

n1, n2 = map(int, raw_input().split())



From martinunsal at gmail.com  Tue Mar  6 02:53:37 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 5 Mar 2007 23:53:37 -0800
Subject: Project organization and import
In-Reply-To: <45ec9ba3$0$2333$426a34cc@news.free.fr>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
Message-ID: <1173167617.207318.22400@h3g2000cwc.googlegroups.com>

On Mar 5, 3:11 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Your own experience *with Python* ?

No, my experience with Visual Basic. ;)

Of course my experience with Python!

Sorry, I can continue writing snarky replies to your snarky comments
but that won't get us anywhere productive. Instead I think the
following really gets to the crux of the issue.

> May I say that the problem here comes from your insistance on putting
> each class in a single module ?

No, it doesn't.

It really doesn't matter how many classes you have in a module; either
you use "from foo import bar", or you are stuck with a file structure
that is isomorphic to your design namespace.

The former breaks reload; the latter breaks large projects.

Martin



From crowell at mit.edu  Wed Mar  7 20:15:47 2007
From: crowell at mit.edu (Rob)
Date: 7 Mar 2007 17:15:47 -0800
Subject: Calling a function with unknown arguments?
In-Reply-To: <1173311306.370427.219650@c51g2000cwc.googlegroups.com>
References: <1173308108.239943.174560@j27g2000cwj.googlegroups.com>
	<1173311306.370427.219650@c51g2000cwc.googlegroups.com>
Message-ID: <1173316547.027316.147630@n33g2000cwc.googlegroups.com>

> You can do this with a list comprehension:
> bob(*[possible[k] for k in bob2.func_code.co_varnames])
>
> The LC creates a list of arg values in the same order as the var names
> for the function. Putting a * before the list when you call bob()
> turns that list into it's arguments.

Thanks Tom! This turns out to be exactly what I needed.



From justin.mailinglists at gmail.com  Tue Mar 27 00:42:15 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 26 Mar 2007 21:42:15 -0700
Subject: shutil.copy Problem
In-Reply-To: <mailman.5648.1174965082.32031.python-list@python.org>
References: <mailman.5648.1174965082.32031.python-list@python.org>
Message-ID: <1174970535.061022.141230@l77g2000hsb.googlegroups.com>

On Mar 27, 11:10 am, David Nicolson <davidnicols... at hotmail.com>
wrote:
> Hi,
>
> I wasn't exactly sure where to send this, I don't know if it is a bug
> in Python or not. This is rare, but it has occurred a few times and
> seems to be reproducible for those who experience it.
>
> Examine this code:
>  >>> try:
>  >>>     shutil.copy("/file.xml","/Volumes/External/file.xml")
>  >>> except Exception, err:
>  >>>     print sys.exc_info()[0]
>  >>>     print err
>
> This is the output:
> exceptions.UnicodeDecodeError
> 'ascii' codec can't decode byte 0xd6 in position 26: ordinal not in
> range(128)]
>
> What could the possible cause of this be? Shouldn't shutil simply be
> reading and writing the bytes and not character decoding them?
>
> Cheers,
> David

what if you try it without the try...except?
perhaps the UnicodeDecodeError is in the print...



From gregpinero at gmail.com  Fri Mar  9 15:57:25 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 9 Mar 2007 12:57:25 -0800
Subject: How to Start a (thread?) and Leave
In-Reply-To: <1173473154.354891.97530@t69g2000cwt.googlegroups.com>
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
	<1173471925.876213.170820@j27g2000cwj.googlegroups.com>
	<1173472226.698504.147260@h3g2000cwc.googlegroups.com>
	<1173473154.354891.97530@t69g2000cwt.googlegroups.com>
Message-ID: <1173473845.525128.119160@8g2000cwh.googlegroups.com>

On Mar 9, 3:45 pm, "abcd" <codecr... at gmail.com> wrote:
> > But a thread leaves the script running until the thread exits, right?
> > So the webpage would just keep saying "loading" at the bottom I think.
>
> > -Greg
>
> give it a shot.  if you spawn off a new thread your code should keep
> executing while the thread does its work in the "background".


That's the thing though, I don't want my code to keep executing, I
want the script to exit/finish completely.

I'm leaning towards os.startfile right now.  I also see some os.spawn
beasties in there but I don't understand those.

-Greg



From malaclypse2 at gmail.com  Fri Mar 16 18:23:59 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 16 Mar 2007 18:23:59 -0400
Subject: SQLite3, data not found
In-Reply-To: <200703161755.58549.inq1ltd@verizon.net>
References: <200703161755.58549.inq1ltd@verizon.net>
Message-ID: <16651e80703161523m12462f6s554593551b164444@mail.gmail.com>

On 3/16/07, jim-on-linux <inq1ltd at verizon.net> wrote:
> Below, the first select produces results but,
> after closing then re-opening the database the
> select produces an empty list.  Anyone know the
> reason ??

When you first open a connection, you implicitly begin a transaction.
You need to call con.commit() before you close the connection, or your
transaction will be rolled back when you close() it.  If don't want to
bother with transaction handling, you can turn it off when you open
the connection, like this:
con = sqlite3.connect('myData', isolation_level=None)

See the Python Database API 2.0 PEP for more details about the
behavior required of DB-API 2.0 compliant interfaces:
http://www.python.org/dev/peps/pep-0249/

-- 
Jerry


From pavlovevidence at gmail.com  Mon Mar 26 11:31:20 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 26 Mar 2007 08:31:20 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174918286.213517.100190@l77g2000hsb.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174918286.213517.100190@l77g2000hsb.googlegroups.com>
Message-ID: <1174923080.941888.198340@p77g2000hsh.googlegroups.com>

On Mar 26, 10:11 am, "Andy Dingley" <ding... at codesmiths.com> wrote:
> On 26 Mar, 14:20, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
>
> > what are the advantages of using Python for
> > creating number crunching apps over Fortran??
>
> If you have to ask, you've not experienced enough Fortran to know its
> sheer horror.
>
> You can write programs in Python that do usefully complicated things,
> and you can get them to work in a reasonable time. Fortran can't do
> this, for anything more than the trivial. "Classic" Fortran tasks of
> the past are now seen as trivial. OK, so they did it to a lot of data,
> but they really didn't do anything very complex to it.

You couldn't be more incorrect.  I have run some very old (pre-Fortran
77) programs that are very far from trivial.

> You can also write Python that other people can read and maintain. You
> can't do this in Fortran, without a truly insane amount of trouble.

This is a lie.  I've seen some Fortran code that was hellspawned, and
some that was clear as glass.  The latter came about without a "truly
insane amount of trouble".

> As
> Fortran programs have historically been authored and hacked on by
> successive generations of grad students, this is the most vital
> feature of all.

Perhaps this is your impression because it's the only Fortran code
you've ever been exposed to?

> Finally we're no longer so interested in "number crunching". Number
> crunching used to consist of simple operations over vast arrays of
> data, although this was data with remarkably simple structure by
> today's standards. These just aren't the major class of problems of
> interest today.

I suspect you're speaking from a narrow perspective, because "number
crunching", as you define it, is still a problem of interest and
heavily researched.  Maybe it's not in your field.  Anyways, you seem
to be ignorant of the complexities of "simple operations over vast
arrays", as if it you could accomplish these operations with a few
lines of Python and numpy.  That might be true for your homework, but
good number-crunching codes often did a lot of stuff under the covers.

> There's a massive difference between old-school FEA
> (bashing Newton and Hooke into tinier and tinier cells) and
> bioinformatics or anything involving the representation of big data
> graphs.

Ok, but exactly how do bioinformatics or big data graphs help you
determine the stress profile in a beam?

> > Python is a tad slower than Fortran
>
> If the Fortran program turns out to have been broken all along, then
> who cares?

That Fortran code is inherently broken is a pretty asinine thing to
suggest.  No one's under the impression that Fortran is a great, all-
purpose language like Python is, but it does what it was designed to
do well.  When faced with a numerical problem, it's reasonable to
consider using Fortran (especially knowing you can interface it with
Python).


Carl Banks



From richardjones at optushome.com.au  Fri Mar 30 22:17:37 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 31 Mar 2007 12:17:37 +1000
Subject: Cheeseshop needs mirrors
References: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>
	<1175249588.897793.24450@o5g2000hsb.googlegroups.com>
	<460d874b$0$5746$afc38c87@news.optusnet.com.au>
	<1175295540.423095.34560@r56g2000hsd.googlegroups.com>
Message-ID: <460dc4c1$0$11540$afc38c87@news.optusnet.com.au>

Paul Boddie wrote:
> Richard Jones wrote:
>> And of course I'll reiterate the same line I always do: the Cheese Shop
>> was set up by a volunteer, enhanced by some other volunteers and exactly
>> nothing more will get done unless more volunteers offer their time.
> 
> Sure. I wasn't criticising the Cheese Shop

Sorry, my comment wasn't directed at you. Your post was just a convenient
target for my reply-to button :)


> However, if people are starting to use it as some kind of auto-
> download site where potentially thousands of users acquire a release
> of, say, Pylons or TurboGears and then aim their tools and start
> downloading many different packages, all without being aware of the
> other side of the transaction, then I think the developers of those
> tools (as opposed to you and the other infrastructure volunteers) need
> to step up and responsibly consider the effects that those tools have.

Indeed :)


    Richard



From fredrik at pythonware.com  Mon Mar  5 04:00:15 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Mon, 5 Mar 2007 10:00:15 +0100
Subject: list-like behaviour of etree.Element
References: <mailman.4658.1173041314.32031.python-list@python.org>
	<1173080656.077853.249520@8g2000cwh.googlegroups.com>
Message-ID: <esgm6v$3qi$1@sea.gmane.org>

Raymond Hettinger wrote:

> On Mar 4, 12:48 pm, "Daniel Nogradi" <nogr... at gmail.com> wrote:

>> The etree.Element (or ElementTree.Element) supports a number of
>> list-like methods: append, insert, remove. Any special reason why it
>> doesn't support pop and extend (and maybe count)?
>
> Those methods would not be hard to add.  Perhaps, submit a feature
> request to Fredrik Lundh on SourceForge and see what he thinks there
> is merit in more closely emulating the list API.  Of the methods you
> listed, the case is probably strongest for extend().

extend() will be in the next release:

    http://effbot.org/zone/elementtree-changes-13.htm

(lxml.etree already has it, btw).

not sure I see the point of pop() and count().  a successful feature request
would need to include some really compelling use cases.

</F> 





From john.pye at gmail.com  Thu Mar 22 10:34:55 2007
From: john.pye at gmail.com (John Pye)
Date: 22 Mar 2007 07:34:55 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <R1rMh.18272$6.13299@tornado.fastwebnet.it>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
	<1174529579.990955.116390@l77g2000hsb.googlegroups.com>
	<R1rMh.18272$6.13299@tornado.fastwebnet.it>
Message-ID: <1174574095.731406.318790@l77g2000hsb.googlegroups.com>

On Mar 22, 7:23 pm, Giovanni Bajo <n... at ask.me> wrote:
> I personally don't use MSYS so I don't know exactly. I use SCons too, and I
> simply run it from the normal command prompt.
>
> I *believe* it's sufficient to unpack MSYS somewhere (you can either unpack it
> *over* the directory where you installed my GCC package, or somewhere else, I
> believe it works either way); since the GCC binaries are added to the system
> PATH by the installer, you should able to run it anyway. You can try by simply
> invoking "gcc -v" at the MSYS prompt and see if it's picking up the right
> version of GCC.
>
> I would appreciate if you give some feedback about this. I would like to
> incorporate your findings on the webpage.

Hi Giovanni

I downloaded your package and installed it in c:/mingw1. It complained
that it could not detect Python, although I have Python 2.4 installed
on my system (did you check HKCU as well as HKLM, perhaps?)

I note that the gccmrt utility does not work from MSYS. You will need
to provide a shell-script equivalent version, in order for that to be
useful for MSYS users. So I opened a cmd prompt and ran the command,
then restarted my MSYS session. There is also a need to be able to
query the *current state* of the gccmrt option.

Next I built my code. It all compiled OK, all the way through to my
NSIS bundle. So that was nice. It includes gfortran, flex, bison, SWIG/
Python and Tcl/Tk linkage: a bit of a coup.

BUT when I try to run my program, I get a windows error msgbox,
"python.exe - Entry Point Not Found: The procedure entry point _ctype
could not be located in the dynamic link library msvcr71.dll".

I don't know what the cause of that missing symbol could be, unless it
has something to do with the fact that I am linking with -lgfortran.

As well as the python module that fails to load (above) I also have a
Tcl/Tk based executable which crashes on launch. Also seems to be
something with msvcr71, but I can't tell for sure.

Have you got any ideas?



From arkanes at gmail.com  Tue Mar  6 11:06:00 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 10:06:00 -0600
Subject: wxPython import error...
In-Reply-To: <1173055327.592532.256350@p10g2000cwp.googlegroups.com>
References: <1173055327.592532.256350@p10g2000cwp.googlegroups.com>
Message-ID: <4866bea60703060806l669df337hae103c7687a96473@mail.gmail.com>

On 4 Mar 2007 16:42:07 -0800, king kikapu <aboudouvas at panafonet.gr> wrote:
> Hi,
>
> i am just completed installing Python/Pydev/Eclipse/wxPython on an
> Ubuntu system and all are running fine except program that contains
> references to wx
>
> It gives me:
> ImportError: /usr/lib/python2.4/site-packages/wx-2.8-gtk2-unicode/wx/
> _core_.so: undefined symbol: PyUnicodeUCS4_FromEncodedObject
>
> I installed the wx packages the way the wx web site says, especially
> for Ubuntu.
>
> Can anyone help with this as i have been searching the net for this
> with no luck...
>
> Thanks for any help
>
> --


This looks like you somehow installed the Redhat packages instead -
Redhat builds their Python with UCS4, everyone else uses UCS2. Did you
download the RPMs and convet them rather than adding the wxCommunity
repo to your sources.lst?


From steveo at syslang.net  Mon Mar  5 14:03:50 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Mon, 5 Mar 2007 14:03:50 -0500 (EST)
Subject: Is every number in a list in a range?
Message-ID: <alpine.LFD.0.83.0703051402200.20945@saturn.syslang.net>

I have a list ll of intergers. I want to see if each number in ll is 
within the range of 0..maxnum

I can write it but I was wondering if there's a better way to do it?

TIA

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From half.italian at gmail.com  Thu Mar 15 14:55:08 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 15 Mar 2007 11:55:08 -0700
Subject: Circular Class Logic
In-Reply-To: <1173962904.306751.86160@n76g2000hsh.googlegroups.com>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
	<1173962904.306751.86160@n76g2000hsh.googlegroups.com>
Message-ID: <1173984908.706651.50260@y80g2000hsf.googlegroups.com>

> Just initialize Folder at module level - see below.
> -- Paul
>
> class Disk(Folder):
>     def __init__(self,driveLetter):
>         super(Disk,self).__init__(driveLetter+":/")

What is going on there?  Is it just explicitly calling the super's
init function?  How is that really different from this:

class Disk(Folder):
  def __init__(self,driveLetter):
    Folder.Folder.__init__(self.path) # ???  Being that Folder is the
superclass?

I'd like to be able to use the shared Disk objects in any class that
is a subclass of Data.  Will the above method still make the Disk
objects available in File.py?  Also, what if the classes are in
different modules.

I'll try to experiment with it this afternoon.  I'm using more
information than just the drive letter.  What if the user wants to
find out the unc path to the share given the drive letter, or copy a
file to the local disk that is not a system disk that has the most
available space on it, or wants to mount or unmount a network drive.

pause...

I'm trying to justify why the Folders/Files really need the drive info
beyond just the paths and I'm having a hard time.  I even just tried
to give an example of how it would be used, and couldn't.  It seems to
make sense on a gut level, but maybe it's just as usefull on it's
own.  There's definitely justification for having Disks be a subclass
of Folder, but not necessarily for there to be an instance of it
available within the classes.  All that kind of work will be external
to the class.

I think I'll backtrace and keep it separate.  Thanks for letting me
think it through.

~Sean



From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 17:18:14 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 23:18:14 +0100
Subject: Project organization and import
In-Reply-To: <1173111489.163974.89990@30g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
Message-ID: <45ec8f2c$0$29110$426a34cc@news.free.fr>

Martin Unsal a ?crit :
> On Mar 5, 12:45 am, "bruno.desthuilli... at gmail.com"
> <bruno.desthuilli... at gmail.com> wrote:
> 
>>Remember that you can put code in
>>the __init__.py of a package, and that this code can import sub-
>>packages/modules namespaces, making the package internal organisation
>>transparent to user code
> 
> 
> Sure, but that doesn't solve the problem.
> 
> Say you have a package "widgets" with classes ScrollBar, Form, etc.
> You want the end user to "import widgets" and then invoke
> "widgets.ScrollBar()". As far as I know there are only two ways to do
> this, both seriously flawed: 1) Put all your code in one module
> widgets.py, 2) use "from scrollbar import *" in widgets/__init__.py,
> which is semi-deprecated 

"deprecated" ? Didn't see any mention of this so far. But it's bad form, 
since it makes hard to know where some symbol comes from.

# widgets.__init
from scrollbar import Scrollbar, SomeOtherStuff, some_function, SOME_CONST

> and breaks reload().

> 
>>Also remember that you can "import as", ie:
>>
>>import some_package.some_subpackage.some_module as some_module
> 
> 
> Sure but that doesn't eliminate the unfortunate interaction between
> Python class organization and filesystem heirarchy.

*class* organization ? It's not Java here. Nothing forces you to use 
classes.

> For example, say
> you want to organize the widgets package as follows:
> 
> widgets/scrollbar/*.py
> widgets/form/*.py
> widgets/common/util.py
> 
> Other than messing around with PYTHONPATH, which is horrible, I don't
> see how to import util.py from the widget code.

Some of us still manage to do so without messing with PYTHONPATH.

> 
>>Bad form IMHO. Packages and module names should be all_lower,
>>classnames CamelCased.
> 
> 
> You're still stuck doing foo.Foo() everywhere in your client code,

from foo import Foo

But:
> which is ugly 

It's not ugly, it's informative. At least you know where Foo comes from.

 > and wastes space,

My. Three letters and a dot...

> or using "from foo import *" which is
> broken.

cf above.

> 
>>>but I
>>>believe this is categorically the wrong thing to do in large projects.
>>
>>Oh yes ? Why ?
> 
> 
> For myriad reasons, just one of them being the one I stated -- smaller
> files with one functional unit each

Oh. So you're proposing that each and any single function goes in a 
separate file ?

> are more amenable to source code
> management with multiple developers.

This is not my experience.

> We could discuss this till we're blue in the face but it's beside the
> point. For any given project, architecture, and workflow, the
> developers are going to have a preference for how to organize the code
> structurally into files, directories, packages, etc. The language
> itself should not place constraints on them. The mere fact that it is
> supposedly "Pythonic" to put more functionality in one file indicates
> to me that the Python package system is obstructing some of its users
> who have perfectly good reasons to organize their code differently.

It has never been an issue for me so far.

> 
>>>you're going to want files to contain the smallest
>>>practical functional blocks. I feel pretty confident saying that "put
>>>more stuff in one file" is the wrong answer, even if it is the
>>>Pythonic answer.
>>
>>Is this actually based on working experience ? It seems that there are
>>enough not-trivial Python projects around to prove that it works just
>>fine.
> 
> 
> Yes. I've worked extensively on several projects in several languages
> with multi-million lines of code

I meant, based on working experience *with Python* ? I've still not seen 
a "multi-million" KLOC project in Python - unless of course you include 
all the stdlib and the interpreter itself, and even then I doubt we get 
so far.

> and they invariably have coding
> styles that recommend one functional unit (such as a class), or at
> most a few closely related functional units per file.

Which is what I see in most Python packages I've seen so far. But we may 
not have the same definition for "a few" and "closely related" ?

> In Python, most of the large projects I've looked at use "from foo
> import *" liberally.

I've seen few projects using this. And I wouldn't like having to 
maintain such a project.

> I guess my question boils down to this. Is "from foo import *" really
> deprecated or not?

This syntax is only supposed to be a handy shortcut for quick testing 
and exploration in an interactive session. Using it in production code 
is considered bad form.

> If everyone has to use "from foo import *"

I never did in 7 years.

> despite
> the problems it causes, how do they work around those problems (such
> as reloading)?

Do you often have a need for "reloading" in production code ???

Martin, I'm not saying Python is perfect, but it really feels like 
you're worrying about things that are not problems.


From jfine at pytex.org  Wed Mar 21 07:19:58 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Wed, 21 Mar 2007 11:19:58 +0000
Subject: Wanted: a python24 package for Python 2.3
References: <45FFFEB6.2080403@pytex.org>	<1174406681.405930.237930@e1g2000hsg.googlegroups.com>
	<mailman.5346.1174409317.32031.python-list@python.org>
Message-ID: <460114DE.80908@pytex.org>

Gerald Klix wrote:
> Hi,
> You can't import subproces from future, only syntactic and semantic 
> changes that will become standard feature in future python version can 
> be activated that way.
> 
> You can copy the subprocess module from python 2.4 somewhere where it 
> will be found from python 2.3. At least subporcess is importable after 
> that:
> 
> --- snip ---
> klix at vesuv6:~/ttt> cp -av /usr/local/lib/python2.4/subprocess.py .
> ?/usr/local/lib/python2.4/subprocess.py? -> ?./subprocess.py?
> klix at vesuv6:~/ttt> python2.3
> Python 2.3.3 (#1, Jun 29 2004, 14:43:40)
> [GCC 3.3 20030226 (prerelease) (SuSE Linux)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import subprocess
>  >>>

You're quite right about the use of __future__.  I decided to
put subprocess in a package, so that my system can choose
which one to find, whether running Python 2.3 or 2.4.

(Well, in 2.3 there's no choice, but in 2.4 I don't want
the "just for 2.3" module to hide the real 2.4 module.)

The responses I've had indicate that my approach might
be a good idea, and might be useful to others.  For me,
that's enough for now.

-- 
Jonathan



From gagsl-py2 at yahoo.com.ar  Mon Mar 12 17:12:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 Mar 2007 18:12:23 -0300
Subject: New to Python
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
	<1173704503.459048.310560@t69g2000cwt.googlegroups.com>
	<20070312131325.M21752@centroin.com.br>
Message-ID: <op.to3g6xmwx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 12 Mar 2007 10:25:15 -0300, Alberto Monteiro  
<albmont at centroin.com.br> escribi?:

> For example, yesterday I wanted to open a window, draw some
> image, and make it move. I tried it with tkinter and with pygame,
> but I didn't succeed - there was no way I could find how to
> begin the image in the center of the window (!!!).
>
> Such basic things are usually solved with a google search, like
> "python image position", but there was no inchantation I could utter
> that would bring me the effect I wanted (oops. Bad example. I guess
> "python image position" would give a useful answer...)

That's the problem: you have to search on how to do that using "pygame",  
or "TkInter" (or Tk actually), or wxWidgets, or GTK, or whatever framework  
you choose to make the GUI. Python itself is not bound to a single  
framework so "how to do this in Python" has no sense, or has many answers  
depending on the chosen framework.

> Another example, I found in pygame functions that would return
> something called an "EventList". But whenever I searched for
> "EventList" to see what is that, I got back to the page with
> the functions that returned the EventList :-)

You can always check yourself if in doubt. At the interpreter prompt, use  
any of these to inspect any object:

repr(xxx) # a string representation of object xxx
type(xxx) # the actual type of xxx
dir(xxx) # list of attributes, including methods
vars(xxx) # name and value for all instance attributes, if any
help()
help(xxx)
help(modules)
help('keyword')

py> b
<webbrowser.WindowsDefault object at 0x00ADBEB0>
py> repr(b)
'<webbrowser.WindowsDefault object at 0x00ADBEB0>'
py> type(b)
<class 'webbrowser.WindowsDefault'>
py> dir(b)
['__class__', '__delattr__', '__dict__', '__doc__', '__getattribute__',  
'__hash_
_', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__',  
'__repr_
_', '__setattr__', '__str__', '__weakref__', 'args', 'basename', 'name',  
'open',
  'open_new', 'open_new_tab']
py> vars(b)
{'basename': '', 'name': ''}
py> help(b)
Help on WindowsDefault in module webbrowser object:

class WindowsDefault(BaseBrowser)
  |  Method resolution order:
  |      WindowsDefault
  |      BaseBrowser
  |      __builtin__.object
  |
  |  Methods defined here:
  |
  |  open(self, url, new=0, autoraise=1)
(...)

> Also, basic things like how does "+" operate on object "xxx"
> are impossible to google search.

Usually you find that on the documentation for "xxx", either online  
http://docs.python.org/lib/lib.html or using help(xxx)

-- 
Gabriel Genellina



From andres at lacordilleraandina.com.ar  Mon Mar 19 18:32:41 2007
From: andres at lacordilleraandina.com.ar (=?iso-8859-1?Q?Andr=E9s?= Martinelli)
Date: Mon, 19 Mar 2007 19:32:41 -0300
Subject: struct.pack returns nothing [3]
In-Reply-To: <op.tpgixokfx6zn5v@gabriel2.softlabbsas.com.ar>
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
	<op.tpgixokfx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <20070319223241.GA21961@mail.lacordilleraandina.com.ar>

I'm using the example of the site
http://docs.python.org/lib/module-struct.html : 

import struct
pack('hhl', 1, 2, 3)

I should get:
>>> '\x00\x01\x00\x02\x00\x00\x00\x03'
I get an empty line, a '\n': 
>>>  
>>> _

I know it should work. The code is OK. 
What could be wrong? Doesnt find the library module?
I repeat that the unpack works ok.
I use debian etch and sarge. Same situation in both of them.

Thanks.
Andr?s M.


From sjmachin at lexicon.net  Fri Mar 23 16:15:29 2007
From: sjmachin at lexicon.net (John Machin)
Date: 23 Mar 2007 13:15:29 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <1174675011.244339@jubilee.claranet.pt>
References: <1174675011.244339@jubilee.claranet.pt>
Message-ID: <1174680929.492601.140270@o5g2000hsb.googlegroups.com>

On Mar 24, 5:37 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Hi!
>
> I was told in this NG that string is obsolet. I should use
> str methods.
>
> So, how do I join a list of strings delimited by a given
> char, let's say ','?
>
> Old way:
>
> l=['a','b','c']
> jl=string.join(l,',')
>
> New way?
>

Self-help #1: reading the documentation: http://www.python.org/doc/2.0/lib/string-methods.html
?
Change "0" to "5" to get the latest released version -- which hasn't
changed the description of the join method AFAICT.

Self-help #2: help() at the interactive prompt:

Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
| >>> help("".join)
Help on built-in function join:

join(...)
    S.join(sequence) -> string

    Return a string which is the concatenation of the strings in the
    sequence.  The separator between elements is S.

| >>>

OK, I'll bite: This was "new" in late 2000 when Python 2.0 was
released. Where have you been in the last ~6.5 years?

HTH,
John



From lbates at websafe.com  Mon Mar 19 18:18:44 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 19 Mar 2007 17:18:44 -0500
Subject: screen size/resolution in win32 in python
In-Reply-To: <1174225888.752421.56410@l75g2000hse.googlegroups.com>
References: <1174225888.752421.56410@l75g2000hse.googlegroups.com>
Message-ID: <45FF0C44.6050607@websafe.com>

adri80386 wrote:
> Hi:
> 
> How I can get the current screen resolution settings (screen.width and
> screen.heigth in pixels) in python.
> 
> Thanks in advance
> 
> Adrian
> 

Please think about the fact that people sometimes now have 2 and even
3 monitors.  Don't do anything with this that would stretch your
application across all 2 (or 3) monitors.  I think screensize isn't
going to give you enough information to automatically size or
position a window.

-Larry


From sean_mcilroy at yahoo.com  Fri Mar  9 15:32:17 2007
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 9 Mar 2007 12:32:17 -0800
Subject: is this a bug? (python 2.3)
Message-ID: <1173472337.094165.65510@8g2000cwh.googlegroups.com>

hi all

when i run this code in python 2.3

######################  BEGIN CODE
class warfare:
    def __init__(self): self.pairs = [[0,0]]*2
    def __str__(self): return str(self.pairs)
    def setfirst (self,i,value): self.pairs[i][0] = value
    def setsecond(self,i,value): self.pairs[i][1] = value

w = warfare()
print w
w.setfirst(0,'hello')
print w
######################  END CODE

i get this result

######################  BEGIN ACTUAL RESULT
[[0, 0], [0, 0]]
[['hello', 0], ['hello', 0]]
######################  END ACTUAL RESULT

instead of the expected result

######################  BEGIN EXPECTED RESULT
[[0, 0], [0, 0]]
[['hello', 0], [0, 0]]
######################  END EXPECTED RESULT

is there a reasonable explanation for this behavior?

peace
stm



From gregturn at mindspring.com  Mon Mar  5 15:52:22 2007
From: gregturn at mindspring.com (Goldfish)
Date: 5 Mar 2007 12:52:22 -0800
Subject: package_data question
In-Reply-To: <1173077773.569831.249980@t69g2000cwt.googlegroups.com>
References: <1173077773.569831.249980@t69g2000cwt.googlegroups.com>
Message-ID: <1173127941.717284.116010@q40g2000cwq.googlegroups.com>

On Mar 5, 1:56 am, "bytecolor" <byteco... at yahoo.com> wrote:
> I have a simple package. I'm trying to add an examples subdirectory
> with distutils. I'm using Python 2.4 on Linux. My file layout and
> setup.py can be found here:
>
> http://www.deadbeefbabe.org/paste/3870
>
> I've tried using data_files as well, with the same result; examples/
> fig2.3.apt is not added to the tarball.
>
> --
> bytecolor

I have a package along with a samples section. I have both a setup.py
script along with a MANIFEST.in file to make sure everything gets in.
You can see both of the files at https://springpython.python-hosting.com/browser/trunk/samples

That is for the samples section. For my main package, I have something
similar at https://springpython.python-hosting.com/browser/trunk/src



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 20:41:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 22:41:42 -0300
Subject: bisect on a list of lists
References: <1173471342.957772@iceman.esoterica.pt>
	<mailman.4874.1173477506.32031.python-list@python.org>
	<1173486322.393479@iceman.esoterica.pt>
Message-ID: <op.tox9nsulx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 21:25:24 -0300, Paulo da Silva  
<psdasilvaX at esotericaX.ptX> escribi?:

> Thanks Gabriel. This sounds very nice for my purpose.
> I have some doubts however. How do I "transform" a list into
> MyList? Is this the best way?
>
> class MyList(list):
> 	def __init__(self,l=None):
> 		if l != None:
> 			self=copy(l) (or self.extend(l) - this does not need copy module)
>
> Then I can do something like xl=MyList([ ... ])

Just omit the __init__ method, if you don't have anything additional to  
do. The inherited method will be used instead, as always:

py> class MyList(list):
...   def cdr(self):
...     return self[1:]
...
py> a = MyList([1,2,3])
py> a
[1, 2, 3]
py> type(a)
<class '__main__.MyList'>
py> a.cdr()
[2, 3]

> I read the description of __new__ but I didn't fully understand it and
> didn't find any examples on how it is used.
> Is it usable in this context? How?

Not really. Would be useful for a tuple (inmutable), because it has no  
__init__. But ask again when you really need it :)

-- 
Gabriel Genellina



From metaperl at gmail.com  Wed Mar 14 18:04:44 2007
From: metaperl at gmail.com (metaperl)
Date: 14 Mar 2007 15:04:44 -0700
Subject: most complete xml package for Python?
In-Reply-To: <1173908076.351577.75000@n59g2000hsh.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
	<1173908076.351577.75000@n59g2000hsh.googlegroups.com>
Message-ID: <1173909884.822838.264030@n76g2000hsh.googlegroups.com>

On Mar 14, 5:34 pm, "John Machin" <sjmac... at lexicon.net> wrote:


>
> Given keywords like "Amara" and "Elementtree" and past history, it
> looked to me like a troll of one kind trying to incite a troll of
> another kind to pop out from under the bridge and chew on his
> ankle :-)

Well, I'm not a troll. And I am now even less impressed with
ElementTree. It does not preserve the document but reforms it in
certain cases.

<script></script>

gets rewritten as

<script />

which leads to problems when embedding Dojo Rich Text Editors.




From ptmcg at austin.rr.com  Tue Mar 13 07:15:09 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 13 Mar 2007 04:15:09 -0700
Subject: converting epoch time to string (and vice versa)
In-Reply-To: <mailman.4999.1173764526.32031.python-list@python.org>
References: <mailman.4999.1173764526.32031.python-list@python.org>
Message-ID: <1173784509.822924.65050@q40g2000cwq.googlegroups.com>

On Mar 13, 12:42 am, Astan Chee <s... at al.com.au> wrote:
> Hi,
> I have a string in this format "DD/MM/YYY" for example:
> tdate = "18/01/1990"
> and Im trying to convert this to epoch time, can anyone help?
> Im also trying to convert that epoch time to the string format
> previously. Can anyone help this one too?
> Thanks!
> Astan

Read up on time.strftime() (_F_ormats a time to a string of various
styles) and time.strptime() (_P_arses a string of various formats into
a time).

-- Paul



From http  Thu Mar  1 23:24:33 2007
From: http (Paul Rubin)
Date: 01 Mar 2007 20:24:33 -0800
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
Message-ID: <7xabywnugu.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> But if you used Apps Hungarian, and saw this line of code:
> 
> if hmmCurrentHeight <= hinCriticalHeight:
> 
> then you should instantly recognise that there's a problem. Comparing
> a height in millimetres to a height in inches is not a good thing to do,
> no matter that they're both floats.

That still sounds like an unreliable manual type system, instead of an
automatic type system that includes dimension analysis.  You might
like this:

    http://futureboy.homeip.net/frinkdocs/

There are many Python implementations of dimensioned units as well.  I
posted one here a few weeks ago.


From steve at REMOVEME.cybersource.com.au  Thu Mar  8 03:33:17 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 08 Mar 2007 19:33:17 +1100
Subject: Howto find dict members from a list of keys
References: <esogs0$41a$1@online.de>
Message-ID: <pan.2007.03.08.08.33.13.84481@REMOVEME.cybersource.com.au>

On Thu, 08 Mar 2007 09:20:20 +0100, Alexander Eisenhuth wrote:

> Hello,
> 
> what algo do you use, when you want to find the dict values from d, with members 
> of l. Following example:
> 
>  >>> d = {1:2,2:3,3:4,4:5,5:6,6:7,7:8,8:9,9:10}
>  >>> l = [7,8]
>  >>> found_dic_members = <yourCode>
>  >>> print found_dict_members
> [8,9]

It depends. 

If all of the values in d are usable as keys (that is, all the values
are hashable, so no lists or sets etc.) then you can build a
reverse-lookup dictionary and use that for fast look-ups.

>>> d = {1: 'a', 2: 'b', 3: 'c'}
>>> rd = dict(zip(d.values(), d.keys()))
>>> rd
{'a': 1, 'c': 3, 'b': 2}

But if you can't do that, you're stuck with a slow search through the
entire dict:

def reverse_search(d, target):
    """Return the first key of dict d that matches the target value."""
    for key, value in d.iteritems():
        if value == target:
            return key
    raise KeyError('no key found matching that value')


In both cases though, you have to think about what you want to happen for
duplicated values.



-- 
Steven D'Aprano 



From thinker at branda.to  Wed Mar 14 13:59:11 2007
From: thinker at branda.to (Thinker)
Date: Thu, 15 Mar 2007 01:59:11 +0800
Subject: getting user id (from an arbitrary sys user)
In-Reply-To: <45F815E1.5020608@fmed.uba.ar>
References: <45F815E1.5020608@fmed.uba.ar>
Message-ID: <45F837EF.5070004@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Gerardo Herzig wrote:
> hi all. What i need to know is if there is some function like
> os.getuid(), but taking an argument (the username, off course), so i can
> do getuid('myuser')
>
> Thanks you dudes!
>
> Gerardo
Please refer http://docs.python.org/lib/module-pwd.html for pwd module.

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFF+Dfv1LDUVnWfY8gRAkfkAKDydeZwxvb1tK+Ms5xE9xWfetNtLACg5xi3
yAJvjodjdL20vU32MVZsLDk=
=iRUm
-----END PGP SIGNATURE-----



From jzgoda at o2.usun.pl  Tue Mar 27 09:36:50 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Tue, 27 Mar 2007 15:36:50 +0200
Subject: Python Error :(
In-Reply-To: <1175001581.323552.37250@n59g2000hsh.googlegroups.com>
References: <1175001581.323552.37250@n59g2000hsh.googlegroups.com>
Message-ID: <eub6t9$k3d$2@nemesis.news.tpi.pl>

Legend napisa?(a):

> I wasn't able to run a Python script. But then later I was able to run
> it through the Shell. I was experimenting with cron jobs and set up
> the python execution in as a cron. The first time it ran, It was fine
> but then after that, it started giving me some errors. Now when I try
> to run the script directly, I get the following error:
> 
> 
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "userbot.py", line 637, in ?
>     con = connect()
>   File "userbot.py", line 607, in connect
>     con.requestRoster()
>   File "user.py", line 531, in requestRoster
>     self.SendAndWaitForResponse(rost_iq)
>   File "user.py", line 326, in SendAndWaitForResponse
>     return self.waitForResponse(ID)
>   File "user.py", line 300, in waitForResponse
>     self.process(1)
>   File "xmlstream.py", line 459, in process
>     if not len(self.read()): # length of 0 means disconnect
>   File "xmlstream.py", line 398, in read
>     data_in=data_in+self._sslObj.read(BLOCK_SIZE).decode('utf-8')
> socket.sslerror: (6, 'TLS/SSL connection has been closed')
> 
> 
> Any help please?

Yes.

-- 
Jarek Zgoda

"We read Knuth so you don't have to."


From casevh at gmail.com  Sat Mar  3 03:03:06 2007
From: casevh at gmail.com (casevh at gmail.com)
Date: 3 Mar 2007 00:03:06 -0800
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
In-Reply-To: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
References: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
Message-ID: <1172908986.759652.7690@h3g2000cwc.googlegroups.com>

On Mar 2, 10:09 am, padu... at cisco.com wrote:
> Folks,
>
> I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
> Reading a file of 13 GBytes, one line at a time.  It appears that,
> once the read line passes the 4 GByte boundary, I am getting
> occasional random line concatenations.  Input file is confirmed good
> via UltraEdit.  Groovy version of the same app runs fine.
>
> Any ideas?
>
> Cheers

It appears to be a bug. I am able to reproduce the problem with the
code fragment below. It creates a 12GB file with line lengths ranging
from 0 to 126 bytes, and repeating that set of lines 1500000 times. It
fails on W2K SP4 with both Python 2.4 and 2.5. It works correctly on
Linux (Ubuntu 6.10).

I have reported on SourceForge as bug 1672853.

# Read and write a huge file.
import sys

def write_file(end = 126, loops = 150, fname='bigfile'):
    fh = open(fname, 'w')
    buff = 'A' * end
    for k in range(loops):
        for t in range(end+1):
            fh.write(buff[:t]+'\n')
    fh.close()

def read_file(end = 126, fname = 'bigfile'):
    fh = open(fname, 'r')
    offset = 0
    loops = 0
    for rec in fh:
        if offset != len(rec.strip()):
            print 'Error at loop:', loops
            print 'Expected record length:', offset
            print 'Actual record length:', len(rec.strip())
            sys.exit(0)
        offset += 1
        if offset > end:
            offset = 0
            loops += 1
            if not loops % 10000: print loops
    fh.close()

if __name__ == '__main__':
    write_file(loops=1500000)
    read_file()

casevh



From rodin.alexander at gmail.com  Wed Mar 14 13:53:29 2007
From: rodin.alexander at gmail.com (inline)
Date: 14 Mar 2007 10:53:29 -0700
Subject: Constructor of object
Message-ID: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>

Hello!
I want to assign self to object of parent class in constructor, like

def my_func():
    ...
    return ParentClass()

class MyClass (ParentClass):
    def __init__(self):
        self = my_func()

but it not work, because "object not initialized". What i can do?



From http  Thu Mar 15 16:46:44 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 12:46:44 -0800
Subject: New Chess Module
References: <1173988685.077287.45240@l75g2000hse.googlegroups.com>
Message-ID: <7xd53aute3.fsf@ruckus.brouhaha.com>

shatranjchess at gmail.com writes:
> written in Python, it's not blazingly fast...but Kasparov
> doesn't even look at 2k nodes per second, does he? ;-)

Wow, cool.  Out of curiosity how many nodes per second does it look
at?


From Ingo.Wolf at gmx.de  Tue Mar  6 08:13:39 2007
From: Ingo.Wolf at gmx.de (iwl)
Date: 6 Mar 2007 05:13:39 -0800
Subject: askstring Window to the top under Windows
Message-ID: <1173186819.622405.121170@30g2000cwc.googlegroups.com>

Hi,

I tryed askstring to input some text in my script,
but some ugly empty Window appears with the
Input-Window behind and all together behind my
Console showing my script. So all have to brought
to the top first by the user - very unconfortable



From duncan.booth at invalid.invalid  Sat Mar 24 14:20:04 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Mar 2007 18:20:04 GMT
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<Xns98FD812654515duncanbooth@127.0.0.1>
	<1174758072.851763.80860@e1g2000hsg.googlegroups.com>
	<56l7o3F29kgs9U2@mid.uni-berlin.de>
Message-ID: <Xns98FDBA8633599duncanbooth@127.0.0.1>

"Diez B. Roggisch" <deets at nospam.web.de> wrote:

> 7stud schrieb:
>> When I try the latter example, I get an error:
>> 
>> lst = ["hello", "world"]
>> print unicode.join(u"\u00d7", lst)
>> 
>> Traceback (most recent call last):
>>   File "test1.py", line 2, in ?
>>     print unicode.join(u"\u00d7", lst)
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\xd7' in
>> position 5: ordinal not in range(128)
> 
> You are mixing unicode with bytestrings here. make "hello" u"hello", 
> same for "world".
> 
Sorry Diez, wrong answer. A unicode separator will cause all the strings 
being joined to be decoded using the default encoding (which could cause 
problems with non-ascii characters in the decoded strings), but the problem 
here is with encoding, not decoding.

7stud: the problem isn't the join, it is printing the string on your 
terminal which is the problem. Try just:

   print u"\u00d7"

and you'll get the same problem. Or:

 lst = ["hello", "world"]
 joined = unicode.join(u"\u00d7", lst)

will work, but you'll still have problems printing the result.

If you try it using a Python interpreter with an appropriate output 
encoding it will work (idle can handle it on my system, but the DOS prompt 
with its default codepage cannot).


From carsten at uniqsys.com  Wed Mar 21 16:02:15 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 21 Mar 2007 16:02:15 -0400
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174502032.402958.213090@y66g2000hsf.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<1174502032.402958.213090@y66g2000hsf.googlegroups.com>
Message-ID: <1174507335.3275.17.camel@localhost.localdomain>

On Wed, 2007-03-21 at 11:33 -0700, gtb wrote:
> On Mar 21, 8:36 am, "flit" <superf... at gmail.com> wrote:
> > 2 - If I put the code in web like a web service, how can I protect my
> > code from being ripped? There is a way to avoid someone using my site
> > and ripping the .py files?
>
> Maybe an application for php. Then any html visible is not source but
> result of execution of php.

How is that different from HTML output that's generated by a Python
script?

-Carsten




From nogradi at gmail.com  Mon Mar 19 05:49:16 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Mon, 19 Mar 2007 10:49:16 +0100
Subject: from maple to python + numpy/scipy
Message-ID: <5f56302b0703190249v7e212197n1b78e697638634e7@mail.gmail.com>

I'm just getting started with numpy/scipy and first would like to get
a view of what it can do and what it can't. The main idea is to move
from maple to python and the first thing that poped up is the fact
that maple is very convenient for both formal manipulations and exact
integer calculations. For instance if a matrix has integer entries and
the eigenvalues are integers maple can find these exactly.

Can numpy/scipy do this? Or the eigenvalues will always be floating
point numbers?


From tfb at tfeb.org  Fri Mar  9 14:10:51 2007
From: tfb at tfeb.org (Tim Bradshaw)
Date: Fri, 9 Mar 2007 19:10:51 +0000
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<1huohy5.1273xi3mtqdc2N%aleax@mac.com>
Message-ID: <essbfq$ro4$1$830fa7a5@news.demon.co.uk>

On 2007-03-09 07:00:06 +0000, aleax at mac.com (Alex Martelli) said:

> (nee "One Laptop Per Child", OLPC, and once known as the "$100 laptop")
> uses Python as its preferred (only?-) application language, and it's
> slated to be the most widely distributed Python distro if it hits even
> half of its ambitious target-numbers...

But it won't get anywhere near that because it's a stupid an 
ill-conceived idea (not because of Python, note!).  The electronic 
gadget people need in the developing world is a mobile phone not a 
computer.



From bernala at gmail.com  Tue Mar 20 08:07:54 2007
From: bernala at gmail.com (Al)
Date: 20 Mar 2007 05:07:54 -0700
Subject: Pycron for windows - please help
In-Reply-To: <mailman.5307.1174343723.32031.python-list@python.org>
References: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>
	<mailman.5307.1174343723.32031.python-list@python.org>
Message-ID: <1174392474.452170.33920@l77g2000hsb.googlegroups.com>

heh... didn't think about that... thanks.



From google at mrabarnett.plus.com  Thu Mar  1 19:20:56 2007
From: google at mrabarnett.plus.com (MRAB)
Date: 1 Mar 2007 16:20:56 -0800
Subject: Installing java2python (Newbie)
In-Reply-To: <mailman.4546.1172715011.32031.python-list@python.org>
References: <1172635476.227019.149350@m58g2000cwm.googlegroups.com>
	<1172637274.994742.173850@p10g2000cwp.googlegroups.com>
	<1172637721.119848.188380@a75g2000cwd.googlegroups.com>
	<1172640476.259853.245530@8g2000cwh.googlegroups.com>
	<1172703266.063800.153890@s48g2000cws.googlegroups.com>
	<mailman.4546.1172715011.32031.python-list@python.org>
Message-ID: <1172794856.193229.81360@8g2000cwh.googlegroups.com>

On Mar 1, 2:05 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Wed, 28 Feb 2007 19:54:26 -0300, MRAB <goo... at mrabarnett.plus.com>
> escribi?:
>
> > On Feb 28, 5:27 am, "troy.melh... at gmail.com" <troy.melh... at gmail.com>
> > wrote:
> >> you want to run the windows command prompt, which is called "cmd.exe"
> >> in windows xp.  press the "start menu", then select "run", then type
> >> "cmd.exe" without the quotes.
> > FYI, a quicker way to the command prompt is Start->All Programs-
> >> Accessories->Command Prompt.
>
> I dont like navigating deep menu structures... I prefer [WindowsKey]+R,
> cmd, [Enter]
>
Well, if you use it a lot then you can pin it to the Start menu.




From grante at visi.com  Tue Mar 13 09:53:22 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 13 Mar 2007 13:53:22 -0000
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<12vatcq6vh3v7ba@corp.supernews.com>
	<tbsJh.9383$PL.4714@newsread4.news.pas.earthlink.net>
Message-ID: <12vdb6ikpi19kb7@corp.supernews.com>

On 2007-03-13, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Mon, 12 Mar 2007 15:45:30 -0000, Grant Edwards <grante at visi.com>
> declaimed the following in comp.lang.python:
>
>> 
>> IMO, robustness is also a quality of a language.  In language
>> like C and C++, it's difficult to write a program that isn't
>> full of potential crashes and exploits: buffer overflows,
>> broken pointers, memory leaks, etc.  Python eliminates many of
>> those sources of problems, and is therefore a "more robust"
>> language.
>
> 	And if one doesn't like the dynamic behavior of Python, there is
> always a visit to comp.lang.ada

Or Modula-3.

-- 
Grant Edwards                   grante             Yow!  I am KING BOMBA of
                                  at               Sicily!...I will marry
                               visi.com            LUCILLE BALL next Friday!


From bdesth.quelquechose at free.quelquepart.fr  Sun Mar 11 14:02:09 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 11 Mar 2007 19:02:09 +0100
Subject: Need help in using mod_python
In-Reply-To: <1173560794.835409.34400@v33g2000cwv.googlegroups.com>
References: <1173560794.835409.34400@v33g2000cwv.googlegroups.com>
Message-ID: <45f43bf9$0$31995$426a74cc@news.free.fr>

yinglcs at gmail.com a ?crit :
> 
> 
> Hi,
> 
> I am trying to setup Apache with Trac which uses mod_python. I get the
> following error:
> 
> assert have_pysqlite > 0
> 
> And I have verify this  via command line as well, that seem no
> problem.

(snip)

What do you get using tracd (the standalone server) ?


From grante at visi.com  Fri Mar  9 16:37:22 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 09 Mar 2007 21:37:22 -0000
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
Message-ID: <12v3ksihos7uj7a@corp.supernews.com>

On 2007-03-09, israphelr at googlemail.com <israphelr at googlemail.com> wrote:

> #################################
> print "\nWelcome !"
> print "\nEnter a word, and the world will be reversed!"
>
> word = raw_input("\nPlease Enter a word: ")
>
> end = len(word)
> end -= 1
>
> for position in range(end, -1, -1):
>    print word[position],
>
> raw_input("\nPress Enter to Exit")
>
> ################################
>
> What actually happens is, the next character is printed on the same
> line but, there is a space inbetween each character.

Yup, that's what print does.  Try sys.stdout.write(word[position]).
You'll have to import sys, of course.

or try this:

print ''.join(reversed(list(word)))

or this:

print word[-1::-1]

I would have sworn there was a string method that returned the
reversed string, but there doesn't seem to be in 2.4.3...

> I thought maybe I could create another variable and then assign each
> character into the new string by concatenating, makign a new string
> each time, but I find this a bit muddling at the moment. Any help'd be
> great. Thanks.

s = ''
for c in word:
    s = c + s
print s

-- 
Grant Edwards                   grante             Yow!  Here I am at the flea
                                  at               market but nobody is buying
                               visi.com            my urine sample bottles...


From inq1ltd at verizon.net  Sun Mar 11 12:04:47 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 11 Mar 2007 11:04:47 -0500
Subject: Signed zeros:  is this a bug?
In-Reply-To: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
Message-ID: <200703111104.47765.inq1ltd@verizon.net>

On Sunday 11 March 2007 10:31, Mark Dickinson 
wrote:
> I get the following behaviour on Python 2.5 (OS
> X 10.4.8 on PowerPC, in case it's relevant.)
>
> >>> x, y = 0.0, -0.0
> >>> x, y
>
> (0.0, 0.0)
>
> >>> x, y = -0.0, 0.0
> >>> x, y
>
> (-0.0, -0.0)
>
> I would have expected y to be -0.0 in the first
> case, and 0.0 in the second.  Should the above
> be considered a bug, or is Python not expected
> to honour signs of zeros?  I'm working in a
> situation involving complex arithmetic where
> branch cuts, and hence signed zeros, are
> important, and it would be handy if the above
> code could be relied upon to do the right
> thing.
>
> Mark



This works for some reason 
instead of x,y =  -0.0, 0.0
clumpy but the results are right.

x = -0.0
y= 0.0
 
x,y
(-0.0, 0.0)




jim-on-linux
http:\\inqvista.com









From DavidRushby at gmail.com  Sun Mar 18 08:24:52 2007
From: DavidRushby at gmail.com (David Rushby)
Date: 18 Mar 2007 05:24:52 -0700
Subject: GCC 4.1.2 installer for Python distutils compilation
In-Reply-To: <mailman.5240.1174195220.32031.python-announce-list@python.org>
References: <mailman.5240.1174195220.32031.python-announce-list@python.org>
Message-ID: <1174220692.775873.211740@l75g2000hse.googlegroups.com>

On Mar 18, 5:08 am, Giovanni Bajo <n... at ask.me> wrote:
> This page:
>    http://www.develer.com/oss/GccWinBinaries
>
> contains a friendly Windows installer for GCC 4.1.2 (MinGW binary version),
> with full support for integrating it with Python installations so that it is
> used by distutils to compile Python extensions.

Sweet!

Even though I have access to MSVC 7.1, so I don't really need MinGW
myself, it can be unnecessarily difficult to get Windows-using
contributors started on a project that involves C extensions.  Your
contribution should improve the situation greatly.

Thanks a lot.



From steven.klass at gmail.com  Thu Mar  8 16:09:01 2007
From: steven.klass at gmail.com (rh0dium)
Date: 8 Mar 2007 13:09:01 -0800
Subject: Dyanmic import of a class
Message-ID: <1173388141.820852.98880@j27g2000cwj.googlegroups.com>

Hi all,

I have a directory with a bunch of python classes each uniquely named
such that the file name (dropping .py) is also the class name of the
file in question.  So for example

foo.py

class foo:
   def __init__(self):
      print "Hi I am %s" % self.__class__.__name__


Now I have a bunch of these files.  I want to be able to dynamically
import each one and run it.  I am having a problem actually doing the
work.   I thought __import__ would work but I can't seem to get it to
work.

for mod in listdir():
   __import__(mod)
   a=mod()
   a.dosomething()  # This is a function which each class shares.

Can anyone help?



From deets at nospam.web.de  Mon Mar 12 06:04:05 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 11:04:05 +0100
Subject: New to Python
References: <mailman.4956.1173688843.32031.python-list@python.org>
Message-ID: <55kmslF249ihcU1@mid.uni-berlin.de>

Alberto Vieira Ferreira Monteiro wrote:

> Hi, I am new to Python, how stupid can be the questions I ask?
> 
> For example, how can I add (mathematically) two tuples?
> x = (1,2)
> y = (3,4)
> How can I get z = (1 + 3, 2 + 4) ?

Others have shown you ways to accomplish this, and stated correctly that
tuples aren't vectors.

You can also go and look into Numpy, the python numerical package. That
let's you do lots of operations on vectors and matrices.

Diez


From gagsl-py2 at yahoo.com.ar  Mon Mar 12 18:05:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 Mar 2007 19:05:18 -0300
Subject: backslashes in lists
References: <BAY126-W58D674B7E9AF10B677D5DD37D0@phx.gbl>
Message-ID: <op.to3jm4p3x6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 12 Mar 2007 12:30:59 -0300, Fabio Gomes <flgoms at hotmail.com>  
escribi?:

> Nice, Lucas.  But help me again, please. What about "echoing" the  
> list:>>> str(alist).replace('\\\\','\\')"['a', 'b', 'c:\\some\\path']"

The \ character is used as an escape character, to represent some  
non-printable chars and other special purposes.
By example, '\n' consists of ONLY ONE character, a "linefeed" (or "new  
line") character.

py> txt = "Hello\nworld!"
py> len(txt)
12
py> print txt
Hello
world!

12 = 5 for "Hello" plus new line (1 char) plus 5 for "world" plus 1 final  
"!"

'\t' is a tab character, '\x7E' is a tilde ~, '\'' is a single quote...  
(If you want the whole story, see http://docs.python.org/ref/strings.html)
To represent a SINGLE backslash inside a string, you have to use '\\'

py> bs = '\\'
py> print len(bs)
1
py> print bs
\
py> print repr(bs)
'\\'

This is a SINGLE character, only one backslash. repr() has to use two  
backslashes and quotes around, but that's how repr works.

py> wrong = 'C:\abcde\fgh\ijklm\no'
py> print wrong
C:bcde?gh\ijklm
o
py> print len(wrong)
18
py> good = 'C:\\abcde\\fgh\\ijklm\\no'
py> print good
C:\abcde\fgh\ijklm\no
py> print len(good)
21

Another way is to use a raw string. A raw string supresses the special  
meaning of \ inside a string literal, and is indicated by a lowercase r  
before the opening quote:

py> raw = r'C:\abcde\fgh\ijklm\no'
py> print raw
C:\abcde\fgh\ijklm\no
py> print len(raw)
21

Going back to your example:
> Because in my script I'm echoing the list to mount lists into lists,  
> like:>>> list1 = ['name', 'test']
>>> list2 = ['path', 'c:\some\path']

This is wrong, and you already should know hot to write it: either

list2 = ['path', 'c:\\some\\path']

or

list2 = ['path', r'c:\some\path']



> Is it possible to print "list" without the doubled backslash?

print list2 will always print it using the doubled backslashes (and [ ]  
around it).
Print each value individually:

py> for item in list2:
...   print item
...
path
c:\some\path

Or tell us exactly what output you want, and we'll try to help more.

The important thing to remember is that '\\' is the way to *show* or  
*represent* a single backslash in a string.


-- 
Gabriel Genellina



From macedo.silva at gmail.com  Fri Mar  9 06:58:24 2007
From: macedo.silva at gmail.com (macedo.silva at gmail.com)
Date: 9 Mar 2007 03:58:24 -0800
Subject: Creat a DLL File from python code,
	and use that DLL file in other Platform (Labview, Java .NET etc)
Message-ID: <1173441503.965228.95590@j27g2000cwj.googlegroups.com>

Hi,

I would like to request your attention for this very specific issue:

I have several classes in Python, and now I want simply re-use it, in
other language.


The closest to solution I think I came was with this site:
http://www.py2exe.org/index.cgi/Py2exeAndCtypesComExeServer?highlight=%28%28Py2exeAndCtypesComDllServer%29%29
but I not able to solve questions related with TLB files and
__init__.py files.

So, could anyone give a tip about HOW TO CREAT a dll file from Python?

thank in advance

AMMS



From bg_ie at yahoo.com  Mon Mar  5 06:09:10 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 5 Mar 2007 03:09:10 -0800
Subject: Dictionary of Dictionaries
In-Reply-To: <mailman.4672.1173091509.32031.python-list@python.org>
References: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
	<mailman.4672.1173091509.32031.python-list@python.org>
Message-ID: <1173092950.398623.61520@8g2000cwh.googlegroups.com>

On 5 Mar, 11:45, "Amit Khemka" <khemkaa... at gmail.com> wrote:
> On 5 Mar 2007 02:22:24 -0800, b... at yahoo.com <b... at yahoo.com> wrote:
>
> > Hi,
>
> > I have the following -
>
> > messagesReceived = dict.fromkeys(("one","two"), {})
>
> This will create a dictionary "messagesReceived", with all the keys
> referring to *same instance* of the (empty) dictionary.
> (   try: messagesReceived = dict( [(k,{}) for k in ('one', 'two') ] )   )
>
>
>
> > messagesReceived['one']['123'] = 11111
> > messagesReceived['two']['121'] = 22222
> > messagesReceived['two']['124'] = 43333
>
> > This gives:
>
> > {'two': {'121': 22222, '123': 11111, '124': 43333}, 'one': {'121':
> > 22222, '123': 11111, '124': 43333}}
>
> And hence the results !
>
> HTH,
>
> --
> ----
> Amit Khemka -- onyomo.com
> Home Page:www.cse.iitd.ernet.in/~csd00377
> Endless the world's turn, endless the sun's Spinning, Endless the quest;
> I turn again, back to my own beginning, And here, find rest.

Thanks for your help!



From massi_srb at msn.com  Fri Mar  2 05:54:55 2007
From: massi_srb at msn.com (Massi)
Date: 2 Mar 2007 02:54:55 -0800
Subject: Getting stdout from ctypes module
Message-ID: <1172832895.643439.204480@h3g2000cwc.googlegroups.com>

Hi everyone, I have a program which is written in C and interfaced
with python via
Ctypes.  The functions I call print stuff out to the console, using
the usual function printf. I would like to know if it is possible to
redirect the output of my C module to python. I'm working on windows
environment. Thanks in advance.



From openopt at ukr.net  Wed Mar 14 12:28:52 2007
From: openopt at ukr.net (dmitrey)
Date: 14 Mar 2007 09:28:52 -0700
Subject: (beginners) howto ascribe _all_ fields of parent class to child class?
Message-ID: <1173889732.055694.264510@p15g2000hsd.googlegroups.com>

Hi all,
I'm rewriting some code from other language  to Python; can anyone
explain me which way is the simpliest:
I have
class C1():
    def __init__(self):
         self.a = 5

class C2(C1):
    def __init__(self):
         self.b = 8

c = C2()
print c.b#prints 8
print c.a#prints error, because field a is absent

so how can I wrote the code that I'll got all class C1 fields (not
only funcs)

Thank you in advance,
Dmitrey



From hg at nospam.org  Tue Mar 27 02:35:34 2007
From: hg at nospam.org (hg)
Date: Tue, 27 Mar 2007 08:35:34 +0200
Subject: socket read timeout
Message-ID: <U39Oh.178798$BK1.144837@newsfe13.lga>

Hi,

I am looking for the most efficient / cleanest way to implement a socket
read with timeout (Windows mainly but would be great if the same code
worked under *nix)

Tanks,

hg



From duncan.booth at invalid.invalid  Tue Mar 27 05:39:19 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Mar 2007 09:39:19 GMT
Subject: PDB does not allow jumping to first statement?
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
	<Xns990055A772011duncanbooth@127.0.0.1>
	<euai58$3jq$02$1@news.t-online.com>
Message-ID: <Xns99006C57F8274duncanbooth@127.0.0.1>

Peter Otten <__peter__ at web.de> wrote:

>> Which version of Python, and what happens when you try it?
>> 
>> It works fine for me with Python 2.5 on Windows:
>> 
>> C:\Temp>\python25\python -m pdb t.py
>>> c:\temp\t.py(3)<module>()
>> -> a = 1
>> (Pdb) s
>>> c:\temp\t.py(4)<module>()
>> -> b = 2
>> (Pdb) j 3
>>> c:\temp\t.py(3)<module>()
>> -> a = 1
>> (Pdb)
> 
> It looks like you successfully jumped to the first line, but it will 
be
> skipped if you try to execute it:
> 

That's why I asked what actually happened. Yes, you and the OP seem to 
be correct, jumping to the first executable line in a module appears not 
to execute the line.

I verified (with a print statement in pdb) that assigning to 
self.curframe.f_lineno sets self.curframe.f_lineno and 
sel.curframe.f_lasti incorrectly:

C:\Temp>\python25\python -m pdb t.py
> c:\temp\t.py(3)<module>()
-> a = 1
(Pdb) s
> c:\temp\t.py(4)<module>()
-> b = 2
(Pdb) s
> c:\temp\t.py(5)<module>()
-> a = 3
(Pdb) l
  1     #!/usr/bin/env python
  2
  3     a = 1
  4     b = 2
  5  -> a = 3
  6     c = a + b
  7     import dis, sys
  8     dis.dis(sys._getframe().f_code)
  9     print c
[EOF]
(Pdb) j 4
f_lineno 4 f_lasti 6
> c:\temp\t.py(4)<module>()
-> b = 2
(Pdb) j 3
f_lineno 4 f_lasti 6
> c:\temp\t.py(3)<module>()
-> a = 1
(Pdb) j 5
f_lineno 5 f_lasti 12
> c:\temp\t.py(5)<module>()
-> a = 3
(Pdb) j 3
f_lineno 4 f_lasti 6
> c:\temp\t.py(3)<module>()
-> a = 1
(Pdb)

The problem looks to be in frameobject.c:

	addr = 0;
	line = f->f_code->co_firstlineno;
	new_lasti = -1;
	for (offset = 0; offset < lnotab_len; offset += 2) {
		addr += lnotab[offset];
		line += lnotab[offset+1];
		if (line >= new_lineno) {
			new_lasti = addr;
			new_lineno = line;
			break;
		}
	}

The first bytes in lnotab are the length and line increment for line 3 
(i.e. 6, 1). If line==f->f_code->co_firstlineno it should set new_lasti=
0, new_lineno=line but the loop still executes once which increments 
new_lasti and new_lineno to the next line (6, 4).




From ms at cerenity.org  Thu Mar 29 18:15:13 2007
From: ms at cerenity.org (Michael)
Date: Thu, 29 Mar 2007 23:15:13 +0100
Subject: Any "consumer review generators" available?
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175193198.147869.293260@d57g2000hsg.googlegroups.com>
Message-ID: <460c38b8$0$8747$ed2619ec@ptn-nntp-reader02.plus.net>

Paul McGuire wrote:

> On Mar 29, 1:19 pm, aral... at aol.com wrote:
>> I am looking for a fake consumer review generator that could generate
>> realistic looking reviews for any products, kind of like on amazon.com
>> but generated by Artificial Intelligence. Is there a package available in
>> your favorite programing language... thx alan
> 
> I have a fake supervisor reference generator for job interviews, a
> fake house inspection generator for real estate transactions, and a
> fake parole testimony generator - maybe you could adapt one of them
> (unfortunately, they are written in dissembler).

+1 QOTW

For some reason I think that's great :)


Michael


From steve at holdenweb.com  Thu Mar 22 14:32:47 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 14:32:47 -0400
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <etui34$24l$1@news4.zwoll1.ov.home.nl>
References: <mailman.5428.1174517933.32031.python-list@python.org>	<ettgei$rki$1@news2.zwoll1.ov.home.nl>	<mailman.5446.1174557039.32031.python-list@python.org>	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
Message-ID: <etui74$l6o$1@sea.gmane.org>

Anton Vredegoor wrote:
[...] I mean, not everyone is able to visit expensive
> high-profile hiring fests like pycon.

What! I resent that remark. PyCon was started precisely because I felt a 
low-cost event would better encourage community involvement. If PyCon is 
beyond your means that you clearly aren't looking to be hired as a 
programmer ;-)

Seriously, I know that not everyone can afford to travel away for a 
week's conference, but I've had reports that people *from the UK* have 
found it cheaper to attend PyCon than the three-day Python UK event held 
in concert with the ACCU (though that track is no longer purely Python 
anyway, so things are changing).

> ... while I'd be immensely useful in a 
> space telescope science institute or a genome database research 
> institute or in an artists educational institute or in a psychological 
> statistics institute or in a computer science or mathematics institute 
> etc. there is no way people can see that, because they're thinking in 
> resumes, job experience and formal education instead of in just asking 
> themselves what needs to be done and can he do it.

With an attitude like the one you exhibit in your post I seriously doubt 
that. "You've got to speculate to accumulate". If you don't have a dream 
your dream can never come true. If you dream of being a paid programmer 
then it's up to you to make it happen. There's no use standing around 
saying "the world is all wrong so no-one will ever hire me".

See it from the employer's side. Their first problem after advertising a 
vacancy is to get the numbers requiring interview down to manageable 
proportions. This involves looking for reasons to reject applications. 
If you can't make it on your resume/CV then try something more 
attention-grabbing. Just don't sit there and whine :-)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From anil.jupiter9 at gmail.com  Sat Mar 10 10:59:29 2007
From: anil.jupiter9 at gmail.com (jupiter)
Date: 10 Mar 2007 07:59:29 -0800
Subject: Database module & multithreading
In-Reply-To: <1hur0ah.tbqxgzjmqcwmN%aleax@mac.com>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<1hur0ah.tbqxgzjmqcwmN%aleax@mac.com>
Message-ID: <1173542369.216188.223200@p10g2000cwp.googlegroups.com>

On Mar 10, 8:42 pm, a... at mac.com (Alex Martelli) wrote:
> jupiter <anil.jupit... at gmail.com> wrote:
>
>    ...
>
> > Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
> > it dosent allow me to use multi threading so which database module is
> > better in terms of multithreading
>
> Perhaps psycopg2 (with PostgreSQL as the engine), according to
> <http://cheeseshop.python.org/pypi/psycopg2/2.0.2> it is specifically
> "designed for heavily multi-threaded applications that create and
> destroy lots of cursors and make a conspicuous number of concurrent
> INSERTs or UPDATEs".
>
> Alex

conn = psycopg2.connect("dbname=test user=test")

Traceback (most recent call last):
  File "<pyshell#8>", line 1, in <module>
    conn = psycopg2.connect("dbname=test user=test")
OperationalError: could not connect to server: Connection refused
(0x0000274D/10061)
	Is the server running on host "???" and accepting
	TCP/IP connections on port 5432?

this is the error I am getting with psycopg2 I want to access a local
file



From mmanns at gmx.de  Thu Mar 29 11:11:47 2007
From: mmanns at gmx.de (Martin Manns)
Date: Thu, 29 Mar 2007 11:11:47 -0400
Subject: inf class (was: gmpy floating point exception)
References: <eufdde$ekb$1@aioe.org>
	<1hvpp4y.albgc51fr3fstN%aleax@mac.com>
Message-ID: <20070329111147.4e7ee05c@localhost>

On Thu, 29 Mar 2007 00:57:03 -0700
aleax at mac.com (Alex Martelli) wrote:

> Martin Manns <mmanns at gmx.net> wrote:
> > 2) Is there any inf type around with
> > a + inf == inf
> > inf > a (as long as a != inf)
> > etc.
> > that works with any other type?
> 
> You mean something like:
> 
> class inf(object):
>     def __radd__(self, other): return self
>     def __gt__(self, other): return self is not other
>     # etc
> inf = inf()

Actually, I meant something a bit more sophisticated:
a=inf()
b=inf()
c=-inf()
d=1e99999
e=numpy.float64(1e99999)
f=gmpy.mpq(1,2)

a > b		OverflowError (AmbiguousValueError?)
a == b		OverflowError (AmbiguousValueError?)
a + b		inf (New inf instance)
a + c		OverflowError (AmbiguousValueError?)
a + d		a
max(a,b)	inf (New inf instance)
max(a,c)	a
max(a,d)	a
max(a,b) == a	OverflowError (AmbiguousValueError?)
max(a,b) == b	OverflowError (AmbiguousValueError?)
max(a,b) > a	OverflowError (AmbiguousValueError?)
max(a,b) >= a	True (if somehow possible)
max(a,b) < a	False (if somehow possible)
a is b		False
a > c		True
a == -a		False
a == -c		OverflowError (AmbiguousValueError?)
a > d		True
a > e		True
c > f		False

The idea is a class that permits non-ambiguous comparisons but throws
exceptions if ambiguous comparisons are made. Since I think that
setting up such a class involves quite some effort (especially
considering things such as a + a) I just wanted to know if something
similar is already around. I am aware of the PEP 326 but I feel that it
does not really address the problem.

Martin


From goodTweetieBird at hotmail.com  Wed Mar 21 12:22:39 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 09:22:39 -0700
Subject: Delete a function
Message-ID: <1174494159.024910.151540@l75g2000hse.googlegroups.com>


After a function has been imported to a shell how may it be deleted so
that after editing it can reloaded anew?

thanx,

gtb



From laurent.pointal at limsi.fr  Wed Mar 14 09:40:44 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 14 Mar 2007 14:40:44 +0100
Subject: Grep Equivalent for Python
In-Reply-To: <mailman.5076.1173876678.32031.python-list@python.org>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<mailman.5076.1173876678.32031.python-list@python.org>
Message-ID: <et8u0e$k2a$1@news2.u-psud.fr>

Steve Holden a ?crit :
> Regular expressions aren't really needed here. Untested code follows:
> 
> for line in open('/proc/meminfo').readlines:
for line in open('/proc/meminfo').readlines():

>     if line.startswith("Memtotal:"):
>         name, amt, unit = line.split()
>         print name, amt, unit
>         break
> 
> regards
>  Steve


From mscottschilling at hotmail.com  Fri Mar 30 13:20:50 2007
From: mscottschilling at hotmail.com (Mike Schilling)
Date: Fri, 30 Mar 2007 17:20:50 GMT
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <SFbPh.10507$JZ3.490@newssvr13.news.prodigy.net>

bugbear wrote:
> Er. How about
>
> public class test {
>   public static void main(String[] args) {
>     String a = "a string";
>     String b = "another one";
>     StringBuffer c = a + b;

String c (etc.), that is.

>     System.out.println(c);
>     }
> }




From gagsl-py2 at yahoo.com.ar  Sun Mar 25 15:16:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 16:16:55 -0300
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<1174746810.280731@jubilee.claranet.pt>
	<1174772896.902905.25640@p15g2000hsd.googlegroups.com>
	<1174847538.764119@jubilee.claranet.pt>
Message-ID: <op.tpreihtgx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 15:31:46 -0300, Paulo da Silva  
<psdasilvaX at esotericaX.ptX> escribi?:

> John Machin escreveu:
>> On Mar 25, 12:32 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>>> John Machin escreveu:

>> [e.g. it's easy to miss the one line in the
>> "official" Python tutorial that refers to them] (3) why you were not
>> using obvious(?) methods to find out for yourself -- much faster than
>> posing a question on the newsgroup, and you don't have to face the
>> possibility of an impertinent response :-)
>
> That's the kind of answer I hate. Of course anyone could find an
> answer to any questions without posting them to this NG.

But knowing why you didn't follow all those "obvious" paths is valuable -  
it can be used to improve the documentation, so the next guy doesn't  
*have* to ask here.

> You could just type ",".join(L).
> Look at the time we are loosing!

It's not a loose at all...

-- 
Gabriel Genellina



From johnjsal at NOSPAMgmail.com  Mon Mar 19 10:33:30 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Mon, 19 Mar 2007 10:33:30 -0400
Subject: Choosing Python
In-Reply-To: <r_pLh.10975$jx3.5577@newssvr25.news.prodigy.net>
References: <PsmLh.8409$yW.3649@newssvr11.news.prodigy.net>
	<q7oLh.11380$PL.6562@newsread4.news.pas.earthlink.net>
	<r_pLh.10975$jx3.5577@newssvr25.news.prodigy.net>
Message-ID: <45fe9ef6$0$32430$c3e8da3@news.astraweb.com>

adaworks at sbcglobal.net wrote:

> One of the many things I like about Ada is that it is the same wherever
> you use it.   Python seems to be that way too.   Java started out that way.
> It was the intention for Java to be more portable than it is.   I have heard
> that Java was released before the developers were finished designing it.
> That would account for some of the upheaval in the language.   I do know
> of one set of software systems that has simply stopped working after the
> initial release of Java was revised.  The appliation was versioned it out
> of compliance.

When Python 3.0 comes out, there will be some backwards incompatibility, 
but I doubt this will be a huge factor. It might just take some time 
before everyone switches to it.


From aleax at mac.com  Sat Mar 17 00:19:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 16 Mar 2007 21:19:08 -0700
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<T9AKh.13297$tD2.11703@newsread1.news.pas.earthlink.net>
Message-ID: <1hv3735.f8r5bx3czob7N%aleax@mac.com>

Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> > need to catch up quickly and master Python programming.How do you
> 
> Mastery and quickly are opposing terms <G> Took me 15 years on a job
> using FORTRAN 77 and I still wouldn't have called myself a master. (I'm
> more of a JoAT)

My favorite "Stars!" PRT, mind you -- but when some language interests
me enough, I do tend to "master" it... guess it's correlated with what
Brooks saw as the ideal "language lawyer" in his "surgical team"
approach, an intrinsic fascination with bunches of interconnected rules.


Alex


From mmoum at woh.rr.com  Sat Mar 24 19:52:51 2007
From: mmoum at woh.rr.com (Mike)
Date: Sat, 24 Mar 2007 19:52:51 -0400
Subject: qt ver. 3, linux, windows, and modal forms
In-Reply-To: <cc780$4605b24b$54d1d767$32358@news.chello.no>
References: <4605a174$0$5225$4c368faf@roadrunner.com>
	<cc780$4605b24b$54d1d767$32358@news.chello.no>
Message-ID: <4605B9D2.7050001@woh.rr.com>

Answers interspersed.

David Boddie wrote:
> On Saturday 24 March 2007 23:08, Mike wrote:
> 
>> I'm having a problem with modal forms on windows. I've written a very
>> short test program, with a main window and a form called from the main
>> window. The form is set to modal with form.setModal(1) before calling
>> form.show().
> 
> Is form an instance of a QWidget subclass or a QDialog subclass?
QDialog
> 
> Have you tried calling form.exec_loop() instead of form.show()?
Yes
> 
>> All works as expected on Linux. The form is modal, not allowing the main
>> window to received the focus. If I call the form from within itself, the
>> topmost form is modal, and not of the previous forms will receive the
>> focus until the topmost form is closed; then the next topmost is modal,
>> and so on.
> 
> This sounds like the desired behaviour.
> 
>> However, on Windows XP Pro (at work - don't use windows at home), the
>> form is not modal. The main window will receive the focus with a mouse
>> click even though the modal form is still on top.
> 
> But this should show the same behaviour. I suspect that the use of show()
> rather than exec_loop() leads to the platform-specific behaviour you are
> seeing.
Tried both - didn't make any difference.
> 
>> The source code is identical on both OS's.
>>
>> Has anyone run into this before? Is there a fix? I haven't been able to
>> find anything with google searches, and Trolltech's forums don't seem to
>> have any entries addressing the problem, either.
>>
>> I have a progam that I'm writing for work using Qt and Python, which was
>> like pulling teeth with our Microsoft oriented IT department, and I very
>> much do not want to tell them that it's not going to work (modal forms
>> are essential).
> 
> Modal forms are quite commonplace, so they should work as you expect. If you
> above advice doesn't help, you'll need to supply some more information about
> the versions of Qt, PyQt, SIP and Python you are using.

I'll have to get back to you on that one. I'm at home now (weekend). 
Will get versions from work and let you know.
> 
> David

Thanks so much,
Mike


From exarkun at divmod.com  Thu Mar 29 07:48:40 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 29 Mar 2007 06:48:40 -0500
Subject: newbi question on python rpc server, how it works?
In-Reply-To: <f81479dd0703282255x5671b898s288e41a4e90f58f6@mail.gmail.com>
Message-ID: <20070329114840.18920.468675877.divmod.quotient.6406@ohm>



On Thu, 29 Mar 2007 11:25:38 +0530, krishnakant Mane <researchbase at gmail.com> wrote:
>hello all,
>I have downloaded the entire twisted library.
>I am also trying to read the documentation but I have a couple of
>problems right now.
>firstly, I did not find any thing in twisted documentation that
>specifically talks about xml rpc.  am I missing some thing?
>secondly, if I am writing an entire application with its logic in an
>xml rpc server, do I have to create all my classes as instences of xml
>rpc server (just like I create a java servlet or a php script)?  or is
>it that I just create one xml rpc server class which is like the entri
>point for all other classes in the package?
>can you provide a couple of links to howtos or tutorials on creating
>xml rpc servers and clients  with twisted python?  I am also confused
>as to how will I mix the functionality of MySQLDB with twisted python?
>I am asking this because I felt twisted much cleaner to use than the
>modules coming with python itself.  again I may be wrong and some one
>might point me to the possible problems with this aproach in the long
>run.
>regards.
>Krishnakant.

Here's an example Twisted-based XML-RPC server:

  http://twistedmatrix.com/projects/web/documentation/examples/xmlrpc.py

When using MySQLdb with Twisted, twisted.enterprise.adbapi is useful.
This document explains it and gives some examples of its usage:


  http://twistedmatrix.com/projects/core/documentation/howto/enterprise.html

Jean-Paul


From lars at gustaebel.de  Mon Mar 19 15:42:47 2007
From: lars at gustaebel.de (Lars =?iso-8859-15?Q?Gust=E4bel?=)
Date: Mon, 19 Mar 2007 20:42:47 +0100
Subject: Create TarFile using string buffers
In-Reply-To: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
Message-ID: <20070319194247.GA8193@axis.g33x.de>

On Mon, Mar 19, 2007 at 12:06:39PM -0700, aurora00 at gmail.com wrote:
> I have a program that generates a number of files that will be
> packaged into a tarball. Can I stream the content into TarFile without
> first writing them out to the file system? All add(), addfile() and
> gettarinfo() seems to assume there is a file in the disk. But for me I
> seems inefficient to write all the content to the disk and then have
> it read back by the TarFile module.

addfile()'s fileobj argument can be anything that has a read()
method. The amount of bytes to read is taken from the
tarinfo.size attribute. You could let your program write its
data to a StringIO object and pass that object to addfile().

http://docs.python.org/lib/tarfile-objects.html

-- 
Lars Gust?bel
lars at gustaebel.de

Linux is like a wigwam - no Gates, no Windows, Apache inside.


From steven.bethard at gmail.com  Sun Mar 18 15:45:38 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 18 Mar 2007 13:45:38 -0600
Subject: getopt or optparse options/arguments wrapping?
In-Reply-To: <1174221597.288852.262760@y66g2000hsf.googlegroups.com>
References: <1174048469.334735.185750@l77g2000hsb.googlegroups.com>
	<_9OdneVkFJIhTWfYnZ2dnUVZ_vWtnZ2d@comcast.com>
	<1174221597.288852.262760@y66g2000hsf.googlegroups.com>
Message-ID: <gd-dneYXS415C2DYnZ2dnUVZ_rKvnZ2d@comcast.com>

Rocky Zhou wrote:
> .dirs .files is just a snapshot of the current directories, which can
> be used to delete-outdated files when restoring. Here I used absolute
> path by using tar's -P parameter. When fs_rstore, it will do this:
> command = "tar -xpz -P -f %s.tgz -T %s" % (archive, self.t_files)
> 
> maybe I want add some parameters of tar, for example, --strip-path=X,
> so I hope the fs_rstore can do this:
> sh# fs_rstore pages --strip-path=X
> rather than:
> sh# fs_rstore pages -w '--strip-path=X'
> 
> What should I do?

One possibility using argparse (http://argparse.python-hosting.com/) 
would be to require the '--' pseudo-argument before all tar options. 
Then you could do something like::

     fs_rstore pages -- --strip-path=X --same-owner

That '--' pseudo-argument makes everything else after it into a 
positional argument (even if they start with '-' or '--'), so you can 
then just collect those positional arguments and add them to your 
"command".   Here's what that code might look like::

     >>> parser = argparse.ArgumentParser(prog='fs_backup')
     >>> parser.add_argument('-a', '--append', metavar='[t/x[L]:]PATH')
     >>> parser.add_argument('-d', '--delete', metavar='PATH')
     >>> parser.add_argument('-t', '--type',
     ...                     choices=['full', 'diff', 'incr'])
     >>> parser.add_argument('identity')
     >>> parser.add_argument('tar_options', nargs='*')
     >>> parser.parse_args('-a foo pages -- --strip-path=X')
     >>> args = parser.parse_args(
     ...     '-a foo pages -- --strip-path=X --same-owner'.split())
     >>> args.append
     'foo'
     >>> args.identity
     'pages'
     >>> args.tar_options
     ['--strip-path=X', '--same-owner']
     >>> "tar %s -f %s.tgz" % (' '.join(args.tar_options), args.identity)
     'tar --strip-path=X --same-owner -f pages.tgz'

Note that all the tar options got collected in 'args.tar_options'.

You could get rid of the need for '--' by adding each tar options to 
your parser with an add_argument() call, but I suspect that's too 
tedious. I've added a feature request to argparse to make this kind of 
thing easier::
     http://argparse.python-hosting.com/ticket/28
Not sure when I'll have a chance to look into this though.

STeVe

P.S. You should be able to get similar behavior out of optparse, though 
you'll have to parse the 'args' list yourself.


From nobody at invalid.com  Thu Mar 22 13:22:40 2007
From: nobody at invalid.com (Erik Johnson)
Date: Thu, 22 Mar 2007 11:22:40 -0600
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<mailman.5432.1174527485.32031.python-list@python.org>
	<1174528562.192439.84480@l77g2000hsb.googlegroups.com>
	<mailman.5434.1174529222.32031.python-list@python.org>
	<1174529622.860892.133800@d57g2000hsg.googlegroups.com>
Message-ID: <4602bb9f@nntp.zianet.com>


"Virgil Dupras" <hardcoded.software at gmail.com> wrote in message
news:1174529622.860892.133800 at d57g2000hsg.googlegroups.com...
> > >>>> class Node:
> > > ...     pass
> > > ...
> > >>>> node = Node()
> > >>>> nextnode = Node()
> > >>>> backup_node = node
> > >>>> node = node.next = nextnode
> > >>>> node.next is node
> > > True
> > >>>> hasattr(backup_node,'next')
> > > False


    Well, I think I am thoroughly confused now. I am a lot less experienced
that most of the people posting in this thread, so perhaps that is to be
expected, but I actually thought I understood Python fairly well. Maybe I am
fooling myself...

  Let me rename some variables in the code above to something a little
easier to follow:

>>> class Node: pass
...
>>> n1 = Node()
>>> n2 = Node()
>>> n3 = n1

At this point I beleive I've got the same thing above, just with different
reference names.  Namely, I have two objects, and three references, the
first and third reference now both referring to the first object, the second
reference referring to the second object:

>>> n1
<__main__.Node instance at 0x7ff1d20c>
>>> n2
<__main__.Node instance at 0x7ff1d10c>
>>> n3
<__main__.Node instance at 0x7ff1d20c>

The discussion is about multiple assignments. Virgil's example should be
equivalent to:

n1 = n1.next = n2

    If assignment were left to right, (i.e., n1 = n1.next, followed by
n1.next = n2), then I would expect to get an attribute error because n1
hasn't had the 'next' attribute attached to it yet.  That's not what
happens, so the other interpretation is that the statement above is
equivalent to: n1.next = n2; n1= n1.next (except that n1.next is only
evaluated once, but that doesn't matter here). Right?  That is, first object
'n1' gets a new attribute, the value of which is a reference to object n2,
and then, the name 'n1' is rebound to be a reference to object n2 (note that
the object n1 was previously referencing should still be available via name
'n3', and being a mutable object, the new attribute should be visible via
'n3', right?

    I didn't yet execute the statement above (I just typed it in this
post) - let's first check the objects and attributes for what we have prior
to this confusing statement:

>>> n1
<__main__.Node instance at 0x7ff1d20c>
>>> n2
<__main__.Node instance at 0x7ff1d10c>
>>> n3
<__main__.Node instance at 0x7ff1d20c>
>>> dir(n1)
['__doc__', '__module__']
>>> dir(n2)
['__doc__', '__module__']
>>> dir(n3)
['__doc__', '__module__']

Right... no suprises there. Let's execute that funky statement...

>>> n1 = n1.next = n2
>>>

We would expect n1 to reference n2 now (my object at ...d10c), which it
does:

>>> n1
<__main__.Node instance at 0x7ff1d10c>

And we would expect n3 to still be referencing the object at ...d20c, which
it also still does:

>>> n3
<__main__.Node instance at 0x7ff1d20c>

And we would expect  (or I should say "I would expect") n3 to now have a
'next' attribute:

>>> dir(n3)
['__doc__', '__module__']

    It doesn't, which is what Virgil previously pointed out. I'm not quite
following the whole discussion (nor the syntax diagrams), so sorry if this
was already explined - could someone try again: why is it that n3 here
doesn't get the 'next' attribute?

    Now here's the part that totally floors me: what would you expect to be
the attributes on n2 (the object on the far-right of the multi-way
assignment statement)? We've made no assigment statements to anything about
n2. They should be the same as before, right?

>>> dir(n2)
['__doc__', '__module__', 'next']
>>> n2.next
<__main__.Node instance at 0x7ff1d10c>
>>> n2
<__main__.Node instance at 0x7ff1d10c>
>>>

 DUH.... I'm about speechless... Is it just me being dense, or is there some
obvious reason why one would expect this?




From tbrkic at yahoo.com  Wed Mar 28 11:09:40 2007
From: tbrkic at yahoo.com (glomde)
Date: 28 Mar 2007 08:09:40 -0700
Subject: Why doesnt __getattr__ with decorator dont call __get_method in
	decorator
In-Reply-To: <1hvodh5.h5rkrahq0el8N%aleax@mac.com>
References: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>
	<1hvodh5.h5rkrahq0el8N%aleax@mac.com>
Message-ID: <1175094580.065287.294770@o5g2000hsb.googlegroups.com>

On Mar 28, 4:47 pm, a... at mac.com (Alex Martelli) wrote:
> glomde <tbr... at yahoo.com> wrote:
> > Hi,
>
> > I tried to write a decorator for that should be for methods but for
> > some reasons
> > it doens seem to work when you try to do it on the __getattr__ method
> > in a class.
> > Could anybody give some hints why this is?
> ...
> > a.test # This doesnt call the __get__ !!!
>
> > Output
> > __get__ <__main__.MyClass1 object at 0x4012baac>
> > hello1
> > Traceback (most recent call last):
> >   File "/home/tonib/test.py", line 27, in ?
> >     a.test
> >   File "/home/tonib/test.py", line 12, in __call__
> >     return self.func(self.instance, *args, **kwds)
> > AttributeError: 'decoratorTest' object has no attribute 'instance'
>
> What Python release are you using?  With Python 2.5, your code gives me
> instead:
>
> >>> a.test
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "a.py", line 11, in __call__
>     return self.func(self.instance, *args, **kwds)
> TypeError: __getattr__() takes exactly 2 arguments (3 given)
>
>
>
> so there would seem to be some "mis-alignment" wrt the problems you
> observe...
>
> Alex

I was using 2.4 but I downloaded and installed ActivePython2.5.0.0 and
for I get the same message as in my original email.
What python version do you use more exactly?

/T






From aralsky at aol.com  Thu Mar 29 14:19:52 2007
From: aralsky at aol.com (aralsky at aol.com)
Date: Thu, 29 Mar 2007 13:19:52 -0500
Subject: Any "consumer review generators" available?
Message-ID: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>

I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan


From sonmez_programming at nerdshack.com  Thu Mar 15 11:30:26 2007
From: sonmez_programming at nerdshack.com (=?UTF-8?B?U8O2bm1leiBLYXJ0YWw=?=)
Date: Thu, 15 Mar 2007 17:30:26 +0200
Subject: Pickle Problem
In-Reply-To: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
Message-ID: <45F96692.7080905@nerdshack.com>

Hi,

You should write your last two lines as ...

	x = DemoClass()
	x.WriteToFile()

Don't miss paranthesis again... :)

Maybe there are still some mistakes too. Does dump method writes list's 
elements?

S?nmez

tonyr1988 wrote:
> I'm a complete python n00b writing my first program (or attempting to,
> anyway). I'm trying to make the transition from Java, so if you could
> help me, it would be greatly appreciated. Here's the code I'm stuck on
> (It's very basic):
> 
> class DemoClass:
> 	def __init__(self):
> 		self.title = ["Hello", "Goodbye"]
> 
> 	def WriteToFile(self, path = "test.txt"):
> 		fw = file(path, "w")
> 		pickle.dump(self.title, fw)
> 		fw.close()
> 
> if __name__=='__main__':
> 	x = DemoClass
> 	x.WriteToFile
> 
> It doesn't do any file I/O at all (that I see). I hope my syntax is
> alright. If I just call WriteToFile, shouldn't it perform with the
> default path? It gives me no errors and pretends to execute just fine.
> 



From sgeiger at ncee.net  Thu Mar 29 10:42:50 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Thu, 29 Mar 2007 09:42:50 -0500
Subject: A nice way to use regex for complicate parsing
In-Reply-To: <1175178887.494344.313070@d57g2000hsg.googlegroups.com>
References: <1175178887.494344.313070@d57g2000hsg.googlegroups.com>
Message-ID: <460BD06A.3050205@ncee.net>

It would be worth learning pyparsing to do this.



aspineux wrote:
> My goal is to write a parser for these imaginary string from the SMTP
> protocol, regarding RFC 821 and 1869.
> I'm a little flexible with the BNF from these RFC :-)
> Any comment ?
>
> tests=[ 'MAIL FROM:<john.smith at address.com>',
>         'MAIL FROM:john.smith at address.com',
>         'MAIL FROM:<john.smith at address.com> SIZE=1234
> OTHER=foo at bar.com',
>         'MAIL FROM:john.smith at address.com SIZE=1234
> OTHER=foo at bar.com',
>         'MAIL FROM:<"this at is.a> legal=email"@address.com>',
>         'MAIL FROM:"this at is.a> legal=email"@address.com',
>         'MAIL FROM:<"this at is.a> legal=email"@address.com> SIZE=1234
> OTHER=foo at bar.com',
>         'MAIL FROM:"this at is.a> legal=email"@address.com SIZE=1234
> OTHER=foo at bar.com',
> ]
>
> def RN(name, regex):
> 	"""protect using () and give an optional name to a regex"""
> 	if name:
> 		return r'(?P<%s>%s)' % (name, regex)
> 	else:
> 		return r'(?:%s)' % regex
>
>
> regex={}
>
> # <dotnum> ::= <snum> "." <snum> "." <snum> "." <snum>
> regex['dotnum']=RN(None, r'[012]?\d?\d\.[012]?\d?\d\.[012]?\d?\d\.
> [012]?\d?\d' % regex)
> # <dot-string> ::= <string> | <string> "." <dot-string>
> regex['dot_string']=RN(None, r'[a-zA-Z0-9]+(?:\.[a-zA-Z0-9]+)*' %
> regex)
> # <domain> ::=  <element> | <element> "." <domain>
> regex['domain']=RN('domain', r'%(dotnum)s|%(dot_string)s' % regex)
> # <q> ::= any one of the 128 ASCII characters except <CR>, <LF>, quote
> ("), or backslash (\)
> regex['q']=RN(None, r'[^\n\r"\\]' % regex)
> # <x> ::= any one of the 128 ASCII characters (no exceptions)
> regex['x']=RN(None, r'.' % regex)
> # <qtext> ::=  "\" <x> | "\" <x> <qtext> | <q> | <q> <qtext>
> regex['qtext']=RN(None, r'(?:\\%(x)s|%(q)s)+' % regex)
> # <quoted-string> ::=  """ <qtext> """
> regex['quoted_string']=RN('quoted_string', r'"%(qtext)s"' % regex)
> # <local-part> ::= <dot-string> | <quoted-string>
> regex['local_part']=RN('local_part', r'%(quoted_string)s|%
> (dot_string)s' % regex)
> # <mailbox> ::= <local-part> "@" <domain>
> regex['mailbox']=RN('mailbox', r'%(local_part)s@%(domain)s' % regex)
> # <path> ::= "<" [ <a-d-l> ":" ] <mailbox> ">"
> # also accept address without <>
> regex['path']=RN('path', r'(?P<path_lt><)?%(mailbox)s(?(path_lt)>)' %
> regex)
> # esmtp-keyword    ::= (ALPHA / DIGIT) *(ALPHA / DIGIT / "-")
> regex['esmtp_keyword']=RN(None, r'[a-zA-Z0-9][-a-zA-Z0-9]*' % regex)
> # esmtp-value      ::= 1*<any CHAR excluding "=", SP, and all        ;
> syntax and values depend on esmtp-keyword
> #                      control characters (US ASCII 0-31inclusive)>
> regex['esmtp_value']=RN(None, r'[^= \t\r\n\f\v]*' % regex)
> # esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
> regex['esmtp_parameter']=RN(None, r'%(esmtp_keyword)s(?:=%
> (esmtp_value)s)?' % regex)
> # esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
> regex['esmtp_parameters']=RN('esmtp_parameters', r'%
> (esmtp_parameter)s(?:\s+%(esmtp_parameter)s)+' % regex)
> # esmtp-cmd        ::= inner-esmtp-cmd [SP esmtp-parameters] CR LF
> regex['esmtp_addr']=RN('esmtp_addr', r'%(path)s(?:\s+%
> (esmtp_parameters)s)?' % regex)
>
> for t in tests:
> 	for keyword in [ 'MAIL FROM:', 'RCPT TO:' ]:
> 		keylen=len(keyword)
> 		if t[:keylen].upper()==keyword:
> 			t=t[keylen:]
> 	    	break
>
> 	match=re.match(regex['esmtp_addr'], t)
> 	if match:
> 		print 'MATCH local_part=%(local_part)s domain=%(domain)s
> esmtp_parameters=%(esmtp_parameters)s' % match.groupdict()
> 	else:
> 		print 'DONT match', t
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From aleax at mac.com  Sat Mar  3 11:27:45 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 08:27:45 -0800
Subject: print a ... z, A ... Z, "\n"' in Python
References: <a23effaf0703030007w3621b75du748c2cb1d9b0340b@mail.gmail.com>
	<d50f6c8a0703030020t44be5c50p8d2dbfe26f55846e@mail.gmail.com>
	<mailman.4627.1172915209.32031.python-list@python.org>
Message-ID: <1hue4sn.74sx3cm5y7m1N%aleax@mac.com>

js  <ebgssth at gmail.com> wrote:

> I forgot to cc pythonlist...
> #####################
> 
> Thanks for you quick reply.
> 
> I didn't know any string constants.
> 
> >From Python Library reference, 4.1.1 String constants:
> 
> letters
>    The concatenation of the strings lowercase and uppercase described below.
>   The specific value is locale-dependent, and will be updated when
> locale.setlocale() is called.
> 
> Great...

If you want to ensure ASCII is used independently of the locale, that's
what string.ascii_letters (and string.ascii_lowercase &c) is for.


Alex


From steve at holdenweb.com  Mon Mar 19 17:14:58 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 17:14:58 -0400
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <etmrvn$7fu$1@sea.gmane.org>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net><56863eF27p5bmU1@mid.uni-berlin.de><WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>	<1174334517.125928.274140@l75g2000hse.googlegroups.com>
	<etmrvn$7fu$1@sea.gmane.org>
Message-ID: <etmuj9$hn1$1@sea.gmane.org>

Terry Reedy wrote:
> <kyosohma at gmail.com> wrote in message 
> news:1174334517.125928.274140 at l75g2000hse.googlegroups.com...
> | I've read .MDB files using ODBC. I don't know how big your files are,
> | but I had a file with almost 3000 rows and I was able to fetch it in
> | 1-2 seconds. If you want to give it whirl, you just need to create an
> | ODBC connection and then do the following:
> 
> I'll just mention that OpenOffice.org Base can make ODBC connections and 
> output in several formats.  Don't know if their ODBC works with .MDB.
> 
I seem to remember I actually managed to open an MDB file with the Open 
Office database component (but that was on Windows, so I can't guarantee 
it will work on Linux).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com




From hancock at anansispaceworks.com  Thu Mar  1 10:12:08 2007
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Thu, 01 Mar 2007 09:12:08 -0600
Subject: imagemagick
In-Reply-To: <1172759286.009577.89600@30g2000cwc.googlegroups.com>
References: <1172759286.009577.89600@30g2000cwc.googlegroups.com>
Message-ID: <45E6ED48.4010900@anansispaceworks.com>

azrael wrote:
> Hy
> did anyone manage to work with imahemagick through python. I've been
> googling like a crazy for some instalation instructions, but i cant
> find anything. please help.

There have been a few wrappers for ImageMagick over the last few years.

There was once something called "PythonMagick", for example. However
AFAIK, they are all currently defunct. There was a later version using
Boost, but it apparently required a lot of system resources to compile
for some reason, and I don't think I was able to.

Apparently ImageMagick has gone through a lot of API changes and people
get disgusted with supporting it (?). There is also, of course the
Python Imaging Library (PIL) that competes with it pretty effectively
for most use cases (of course ImageMagick has unparalleled image
conversion support).

If you really want ImageMagick, though, you might want to consider
writing your own wrapper (perhaps using ctypes, now that it is included
in the standard library).

I have used 'popen' to run it as a separate process in the past. The
'subprocess' module would be the smart way to do that today, and that
might be your fastest solution.

Cheers,
Terry


-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From jimhill at swcp.com  Wed Mar 14 22:27:03 2007
From: jimhill at swcp.com (Jim Hill)
Date: Thu, 15 Mar 2007 02:27:03 +0000 (UTC)
Subject: Python books?
References: <mailman.4836.1173410475.32031.python-list@python.org>
	<1173427057.176019.171130@n33g2000cwc.googlegroups.com>
Message-ID: <etaatn$nlo$1@iruka.swcp.com>

wesley chun wrote:

>my book, Core Python Programming, is revised to 2.5, but focuses on
>teaching you the core part of the language, features, objects, memory
>management, development, good practices, some advanced topic coverage,
>and presents lots of exercises.  however, it is not an exhaustive
>guide to the standard library.

Sadly, the centerfolds were 'shopped and had bottle-bleached hair.

Wait, that was a different read.  CPP has been invaluable for me and I'd
recommend it for the OP even though it's not dedicated solely to the
PSL.  OK?


Jim
-- 

                 It's not "pretexting", it's "lying."


From greg at cosc.canterbury.ac.nz  Fri Mar  2 23:34:35 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 03 Mar 2007 17:34:35 +1300
Subject: Python Source Code Beautifier
In-Reply-To: <rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
Message-ID: <45E8FADB.7000902@cosc.canterbury.ac.nz>

Alan Franzoni wrote:
> I would assume then, that if the '+=' operator
> is assumed to modify objects in-place, it would just fail on immutable
> objects, wouldn't I?

Then you wouldn't be able to do things like

    x = 3
    x += 1

which would result in howls of outrage from the
*other* half of the Python community.

The x += y syntax is designed to fill two different
but equally useful roles: one is to modify objects
in-place, the other is to be a short hand for
x = x + y.

This was all discussed at *very* great length many
years ago, and the addition of in-place operators
to the language was held up for a long time until
the present compromise was devised. You might not
like it, but it's here to stay.

--
Greg


From http  Fri Mar 16 11:56:01 2007
From: http (Paul Rubin)
Date: 16 Mar 2007 07:56:01 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<7x6491k9t3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.16.08.18.32.205449@gmx.net>
	<xoednQr6GoIkJGfYnZ2dnUVZ_o7inZ2d@comcast.com>
Message-ID: <7xveh1i3n2.fsf@ruckus.brouhaha.com>

Steven Bethard <steven.bethard at gmail.com> writes:
> > According to a post by Raymond Hettinger it's faster to use that
> > iterator instead of `int`.
> Yep. It's because the .next() method takes no arguments, while int()
> takes varargs because you can do:: ...

Heh, good point.  Might be worth putting a special hack in defaultdict
to recognize the common case of defaultdict(int).


From gregpinero at gmail.com  Thu Mar 15 15:58:42 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 15 Mar 2007 12:58:42 -0700
Subject: printing to a redirected stdout from a process that was called
	with "2>&1 > /dev/null &"
In-Reply-To: <1170112357.792999.241280@s48g2000cws.googlegroups.com>
References: <1170112357.792999.241280@s48g2000cws.googlegroups.com>
Message-ID: <1173988722.201557.124420@l77g2000hsb.googlegroups.com>

On Jan 29, 7:12 pm, "Pappy" <helga... at gmail.com> wrote:
> SHORT VERSION:PythonFile B changes sys.stdout to a file so all 'prints' are written
> to the file.  Pythonfile A launchespythonfile B with os.popen("./B
> 2>&^1 >dev/null &").  PythonB's output disappears into never-never
> land.
>
> LONG VERSION:
> I am working on a site that can kick off large-scale simulations.  It
> will write the output to an html file and a link will be emailed to
> the user.  Also, the site will continue to display "Loading..." if the
> user wants to stick around.
>
> The simulation is legacy, and it basically writes its output to stdout
> (via simple print statements).  In order to avoid changing all these
> prints, I simply change sys.stdout before calling the output
> functions.  That works fine.  The whole thing writes to an html file
> all spiffy-like.
>
> On thecgiend, all I want my (python)cgiscript to do is check for
> form errors, make sure the server isn't crushed, run the simulation
> and redirect to aloadingpage (in detail, I write a constantly
> updating page to the location of the final output file.  When the
> simulation is done, the constantly updating file will be magically
> replaced).  The root problem is that the popen mechanism described
> above is the only way I've found to truly 'Detach' my simulation
> process.  With anything else, Apache (in a *nix environment) sits and
> spins until my simulation is done.  Bah.
>
> Any ideas?
>
> _jason


Did you ever find your answer Mr. _jason?  I'm trying to do the same
thing now but even with the subprocess module the broswer still says
loading until the subprocess is done.

Is there truly NO way to kick of a process and be done with it
forever?

-Greg



From grflanagan at yahoo.co.uk  Thu Mar  8 04:17:37 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 8 Mar 2007 01:17:37 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
Message-ID: <1173345456.968709.128870@j27g2000cwj.googlegroups.com>

On Mar 7, 7:32 pm, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
> Hi all,
>
> Imagine I have three functions a(x), b(x), c(x) that each return
> something or raise an exception.  Imagine I want to define a function
> that returns a(x) if possible, otherwise b(x), otherwise c(x),
> otherwise raise CantDoIt.
>


(This is my first decorator.)  You could also just raise your custom
exception rather than having a "retval". Other variations I'm sure are
possible. HTH.


import exceptions

class ABCException(exceptions.Exception):
    pass

def onfail(retval):
    def outer(fn):
        def inner(*args, **kwargs):
            try:
                return fn(*args, **kwargs)
            except:
                return retval
        return inner
    return outer

@onfail(False)
def a(x):
    if x == 1:
        return 'function a succeeded'
    else:
        raise

@onfail(False)
def b(x):
    if x == 2:
        return 'function b succeeded'
    else:
        raise

@onfail(False)
def c(x):
    if x == 3:
        return 'function c succeeded'
    else:
        raise

def doit(x):
    for f in [a, b, c]:
        result = f(x)
        if result:
            return result
    raise ABCException()

print doit(1)
print doit(2)
print doit(3)
print doit(4)

---------------------------

function a succeeded
function b succeeded
function c succeeded
Traceback (most recent call last):
  File "\working\scratch.py", line 48, in ?
    print doit(4)
  File "\working\scratch.py", line 43, in doit
    raise ABCException()
__main__.ABCException
shell returned 1






From skip at pobox.com  Wed Mar  7 17:07:38 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 7 Mar 2007 16:07:38 -0600
Subject: Python 2.1 and Daylight saving time
In-Reply-To: <93D4B94043372746B559247AD6A3CC0F11CB06@bluepost.nes.nespower.nes>
References: <17903.5426.372813.378190@montanaro.dyndns.org>
	<93D4B94043372746B559247AD6A3CC0F11CB06@bluepost.nes.nespower.nes>
Message-ID: <17903.14250.376322.386391@montanaro.dyndns.org>

removing webmaster email address...

Others reading this with more experience manipulating timezones please
reply.  This is completely out of the realm of my experience, but since I
pointed Wayne here from the webmaster mailing list I felt I should respond.
What I've written is based solely on reading a bit of the current time
module documentation and peeking at the time module source
(ever-so-briefly).

    Wayne> I mainly needed to know if I could avert Daylight Saving Time
    Wayne> issues by upgrading to Python 2.5.

    Wayne> It appears that Python gets it UTC settings from a table in the C
    Wayne> library. Does this still hold true for Python 2.5. It looks that
    Wayne> it will fail to recognize the new DST 2007 changes.

Python's timezone code is reliant on the functions provided by your system's
libc routines.  Starting in Python 2.3 if your system has a working tzset()
function in libc the time module exposes a tzset() function which you can
use to change the rules used by your system.  If your system's timezone
information hasn't been updated I imagine you could coax the correct
behavior out of your application with tzset().  I suggest you read the
relevant documentation

    http://docs.python.org/dev/lib/module-time.html

before contemplating upgrading from 2.1 to something more recent and/or
modifying your application to use tzset().  Given the minimal amount of time
between now and Sunday morning I suspect your best chance of correct
operation will be to have the correct timezone tables installed on your
computer.

Skip


From nick at craig-wood.com  Fri Mar  9 05:30:07 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Fri, 09 Mar 2007 04:30:07 -0600
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
Message-ID: <slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>

dbhbarton at googlemail.com <dbhbarton at googlemail.com> wrote:
>  What if 2 new 'special' comment-like characters were added to Python?:
> 
> 
>  1. The WIP (Work In Progress) comment:

I use # FIXME for this purpose or /* FIXME */ in C etc.

I have an emacs macro which shows it up in bright red / yellow text so
it is easy to see and the company has a system which makes a web page
with a list of all the FIXMEs on.

FIXME is easy to grep for, language neutral and a lot of people use
something similar (eg XXX or TODO).

>  2. The HALT comment:

You can so this with triple quotes.  ''' and ''' (if you normally use
""" """ for docstrings)

Python just ignores strings that lie around.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From steven.bethard at gmail.com  Sun Mar 25 00:20:36 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 24 Mar 2007 22:20:36 -0600
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
Message-ID: <gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>

7stud wrote:
> Here is some example code that produces an error:
> 
> class Test(object):
>         def greet():
>                 print "Hello"
> 
> t = Test()
> t.greet()
> TypeError: greet() takes no arguments (1 given)
[snip]
> Test.greet()
> 
> TypeError: unbound method greet() must be called with Test instance as
> first argument (got nothing instead)

Methods in a class are generally expected to take an instance as their 
first argument, but your greet() method takes no arguments.  This is 
because classes don't invoke the function directly, they convert it to 
an 'unbound method' object::

     >>> class Test(object):
     ...     def greet():
     ...         print 'Hello'
     ...
     >>> Test.greet
     <unbound method Test.greet>
     >>> Test.greet()
     Traceback (most recent call last):
       File "<interactive input>", line 1, in <module>
     TypeError: unbound method greet() must be called with Test instance
     as first argument (got nothing instead)

If you really want to get to the original function, there are a couple 
of options.  You can go through the class's __dict__, or you can wrap 
your method with a @staticmethod decorator (which tells the class not to 
wrap the function when you try to use it)::

     >>> Test.__dict__['greet']
     <function greet at 0x00E708B0>
     >>> Test.__dict__['greet']()
     Hello
     >>> class Test(object):
     ...     @staticmethod
     ...     def greet():
     ...         print 'Hello'
     ...
     >>> Test.greet
     <function greet at 0x00E7D2F0>
     >>> Test.greet()
     Hello

STeVe


From jon+usenet at unequivocal.co.uk  Thu Mar 22 12:23:58 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 22 Mar 2007 16:23:58 GMT
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<1174506107.863399.7970@l75g2000hse.googlegroups.com>
	<mailman.5425.1174512989.32031.python-list@python.org>
	<1174580529.081658.326800@b75g2000hsg.googlegroups.com>
Message-ID: <slrnf05bcu.cg1.jon+usenet@snowy.squish.net>

In article <1174580529.081658.326800 at b75g2000hsg.googlegroups.com>, starGaming at gmail.com wrote:
> I don't see any problem with::
> 
> if version_info[0] <= 2 and version_info[1] < 4:
>     raise RuntimeError()

What if the version number is 1.5?


From yinglcs at gmail.com  Thu Mar  8 16:13:13 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 8 Mar 2007 13:13:13 -0800
Subject: What is the best way to upgrade python?
Message-ID: <1173388393.052558.69270@s48g2000cws.googlegroups.com>

Hi,

i am using red hat enterprise 4. It has python 2.3 installed. What is
the best way to upgrade to python 2.4?

I think one way is to compile python 2.4 from the source, but I can't
remove the old one since when i do 'rpm -e python', i get error like
'failed dependencies'.

Thank you for any idea.



From lixianmin at gmail.com  Tue Mar 27 02:07:14 2007
From: lixianmin at gmail.com (=?UTF-8?B?5p2O546w5rCR?=)
Date: Tue, 27 Mar 2007 14:07:14 +0800
Subject: enumerating processes
In-Reply-To: <4608A870.5000302@ncee.net>
References: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>
	<4608A870.5000302@ncee.net>
Message-ID: <3abd07c80703262307q4a0b4a7ake26d0863c9445ff7@mail.gmail.com>

thanks for your help, but that is not what I am looking for. My question is:
I need to determine whether another process is running now ---in my problem,
that is 'tomcat5.exe' ---that determines what should I do next.

thanks !



On 3/27/07, Shane Geiger <sgeiger at ncee.net> wrote:
>
> I believe you are looking for os.getpid()
>
>
> ??? wrote:
> > hi ,all
> >    any one knows how to enumerate the current running processes , or
> > how to obtain a specific process by its name or process id. I know I
> > can do this in many  programming languages , but how in python? any
> > one know?
> >  Thanks for any guidance.
> >
> > --
> > li xianmin
> >
> >            lixianmin at gmail.com <mailto:lixianmin at gmail.com>
>
> --
> Shane Geiger
> IT Director
> National Council on Economic Education
> sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> Leading the Campaign for Economic and Financial Literacy
>
>
>


-- 
li xianmin

           lixianmin at gmail.com
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From john.pye at student.unsw.edu.au  Tue Mar 20 23:46:03 2007
From: john.pye at student.unsw.edu.au (John Pye)
Date: Wed, 21 Mar 2007 14:46:03 +1100
Subject: [Swig-user] How to receive a FILE* from Python under MinGW?
In-Reply-To: <6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
Message-ID: <4600AA7B.1080605@student.unsw.edu.au>

Hi Carl

I'm not sure that your snippet really solves my problem. As far as I can
see from, you're just passing a filename instead of a file pointer,
right? And then you're using the Python fopen-equivalent
(PyFile_FromString) This is not an option for me, as I want to pass the
FILE* from Python and all the way into into a existing shared-library
code. I can't change the latter; it must work ok with standard fprintf
(etc) functions.

If I've missed something, perhaps you could clarify a little bit more on
how it is that you're overcoming the FILE* problem?

Cheers
JP

See also
http://groups.google.com/group/comp.lang.python/browse_frm/thread/7b69b34240169f7e/ac8fae1b61832f51?lnk=st&q=file+mingw+python&rnum=30#ac8fae1b61832f51

And
http://mail.python.org/pipermail/python-list/2007-March/430695.html
http://groups.google.com/group/comp.lang.python/browse_frm/thread/6d7569e7fd996daf/
http://groups.google.com/group/comp.lang.python/browse_frm/thread/17558adbc053f26d/

Carl Douglas wrote:
> Hi John,
>
> I had exactly this problem... use the PyFile_AsFile function.  Below
> is a code snippet from my project:
>
>         // Thank you:  http://www.ragestorm.net/tutorial?id=21#8
>         PyObject* PyFileObject = PyFile_FromString(ofn.lpstrFile, "r");
>
>         if (PyFileObject == NULL)
>         {
>             PyErr_Print();
>             PyErr_Clear();
>             return false;
>         }
>
>         // Because microsoft C runtimes are not binary compatible, we
> can't
>         // just call fopen to get a FILE * and pass that FILE * to
> another application
>         // or library (Python25.dll in this case) that uses a
> different version
>         // of the C runtime that this DLL uses. Using PyFile_AsFile is a
> work-around...
>
>         if (PyRun_SimpleFile(PyFile_AsFile(PyFileObject),
> ofn.lpstrFile) == -1)
>         {
>             PyErr_Print();
>             PyErr_Clear();
>         }
>
>         Py_DECREF(PyFileObject);
>
> For the full source of my SWIG/Python project, poke around here:
>
> http://l3dtpython.googlecode.com/svn/trunk/cdPython/
>
> Hope that helps.
>
> On 3/21/07, John Pye <john.pye at student.unsw.edu.au> wrote:
>> Hi all
>>
>> There is fairly well-known problem on MinGW with passing FILE pointers
>> to Python. The problem seems to be that Python depends on a different
>> version of msvcrt*.dll to that which MinGW depends on, and these
>> different C runtimes provide different FILE implementations.
>>
>> The upshot of that seems to be that file objects created in Python via
>> the 'file(...)' command can't safely be used in a SWIG module. It can be
>> done perfectly (using SWIG typemap and PyFile_AsFile) on Linux but it
>> fails with a segfault on Windows.
>>
>> What is the best possible workaround for this? Surely someone must have
>> found a satisfactory solution to this problem?
>>
>> Cheeers
>> JP 

-- 
John Pye
Department of Mechanical and Manufacturing Engineering
University of New South Wales, Sydney, Australia
http://pye.dyndns.org/



From theller at ctypes.org  Sat Mar  3 17:50:04 2007
From: theller at ctypes.org (Thomas Heller)
Date: Sat, 03 Mar 2007 23:50:04 +0100
Subject: py2exe: LoadLibrary(pythondll) failed
In-Reply-To: <1172947039.158260.225980@j27g2000cwj.googlegroups.com>
References: <1172947039.158260.225980@j27g2000cwj.googlegroups.com>
Message-ID: <escu2q$490$1@sea.gmane.org>

zxo102 schrieb:
> Hi there,
>    I py2exe my test.py  as test.exe with a lot of dll and pyc in that
> directory. If I move the test.exe into another directory and run it
> from there, it gives me an error " LoadLibrary(pythondll) failed...
> python24.dll".  How can I set it up correctly for this test.exe to
> run?   Thanks.
> 
> Ouyang
> 
> 

The test.exe created by py2exe relies on everything else in the dist directory,
so you must copy these files as well.

Thomas



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 03:56:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 05:56:40 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<1173426599.403173.49240@v33g2000cwv.googlegroups.com>
Message-ID: <op.towy4qobx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 04:49:59 -0300, Gerard Flanagan  
<grflanagan at yahoo.co.uk> escribi?:

> Another version:
>
> import exceptions

As back in time as I could go (Python 1.5), exceptions were available as  
builtins...

> def onfailFalse(fn):
>     def inner(*args, **kwargs):
>         try:
>             return fn(*args, **kwargs)
>         except ABCException:
>             return False
>     return inner
>
> @onfailFalse
> def a(x):
>     if x == 1:
>         return 'function a succeeded'
>     else:
>         raise ABCException()

There is a serious flaw on this approach, the function can't return any  
false value (it would be treated as a failure).

-- 
Gabriel Genellina



From adam at atlas.st  Mon Mar  5 01:31:42 2007
From: adam at atlas.st (Adam Atlas)
Date: 4 Mar 2007 22:31:42 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
Message-ID: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>

I wrote this little program called Squisher that takes a ZIP file
containing Python modules and generates a totally self-contained .pyc
file that imports a specified module therein. (Conveniently, Python's
bytecode parser ignores anything after an end marker, and the
zipimport mechanism skips any non-ZIP data at the beginning of a
file!) For example, say you have a directory called 'foo', which
contains an __init__.py, which contains "print 'hello'; x = 123", and
a thing.py, which contains "y = 456". If you make a ZIP archive of
this and run it through Squisher, you'll get a single .pyc file which
can be imported by any Python installation anywhere just like any
other module, without requiring users to install any supporting
mechanisms (like setuptools), and giving all the flexibility and
stability of zipimport. In other words, you can do this simply by
dropping the foo.pyc file into a directory:

>>> import foo
hello
>>> foo.x
123
>>> from foo.thing import y
>>> y
456

Of course, this is a stupid and useless example, but you can do it
with any package you could use as an egg, yet without requiring people
to install setuptools (or any other external glue) to use it. I've
tested it with several large packages, including SQLAlchemy.

Right now I'm just testing and polishing up the code... in the
meantime, any comments?



From robert.kern at gmail.com  Thu Mar 15 20:49:36 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 15 Mar 2007 19:49:36 -0500
Subject: newb: Python Floating Point
In-Reply-To: <1174003795.849903.273220@l75g2000hse.googlegroups.com>
References: <1174003795.849903.273220@l75g2000hse.googlegroups.com>
Message-ID: <etcpj4$ebs$1@sea.gmane.org>

johnny wrote:
> When I do the following, rounding to 2 decimal places doesn't seem to
> work.  I should get 0.99 :
> 
>>>> a =0.99
>>>> a
> 0.98999999999999999
>>>> round(a,2)
> 0.98999999999999999

http://docs.python.org/tut/node16.html

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From gnewsg at gmail.com  Mon Mar  5 08:48:34 2007
From: gnewsg at gmail.com (billiejoex)
Date: 5 Mar 2007 05:48:34 -0800
Subject: ANN: pyftpdlib 0.1 released
Message-ID: <1173102514.190879.7600@p10g2000cwp.googlegroups.com>

Hi all,
I'm proud to announce the first beta release of pyftpdlib available at
the following urls:

home: http://billiejoex.altervista.org/pyftpdlib.html
google code: http://code.google.com/p/pyftpdlib/

About
=====

pyftpdlib is an high-level FTP server library based on asyncore/
asychat frameworks.
pyftpdlib is actually the most complete RFC959 FTP server
implementation available for Python programming language.

Requirements
==========

Python 2.2 or higher

Bug reports / Contacts
================

billiejoex -_[AT]_- gmail (dot) com



From steve at REMOVEME.cybersource.com.au  Thu Mar 22 03:07:30 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 18:07:30 +1100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1tkMh.115$mG4.94@newsfe12.lga>
Message-ID: <pan.2007.03.22.07.07.29.369580@REMOVEME.cybersource.com.au>

On Wed, 21 Mar 2007 20:59:57 -0400, Bart Willems wrote:

> Or the consultant wants to be sure that the two dimwitted nimcumpoops at 
> the office who /think/ they can write code don't screw up the script 
> when they're trying to 'fix' or 'improve' something. And blame the 
> consultant if the script all of a sudden stops working 'we did not do 
> anything. It just stopped working all of a sudden'.
> Or he doesn't want to expose the passwords needed to logon to the 
> database server. Or whatever.
> 
> So, there are reasons enough why someone wants to render his code 
> immutable and/or unreadable *to some extent*.

And that's what I've been asking. How to protect the code depends on what
you are trying to protect it from. Why is that so hard to understand?

In the above scenarios, one solution is:

chmod a-w script.py

If they don't have write permission, they can't "improve" it by adding
bugs. If they take the time and effort to give themselves write
permission, then they have accepted responsibility for breaking it.


> The OP clearly states that he does not want a discussion as to why to 
> protect the code.

The OP might not want such a discussion, but without it, any answers he
gets are sure to be bad answers except by accident.



> All he wants is something that turns 'readable, 
> changeable python' into 'unreadable, immutable python'.

chown scriptuser script.py  # a unique user
chmod a-rwx script.py
chmod u+rx script.py

I believe that fully meets the functional requirements. Where shall I send
the invoice?


-- 
Steven D'Aprano 



From eric_brunel at despammed.com  Fri Mar  2 11:32:02 2007
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 02 Mar 2007 17:32:02 +0100
Subject: tkinter what do you use?
References: <es9f6i$660$1@ss408.t-com.hr>
Message-ID: <op.tokljouwrqur0o@eb.pragmadev>

On Fri, 02 Mar 2007 16:17:32 +0100, Gigs_ <gigs at hi.t-com.hr> wrote:

> list = Listbox()
> list.insert('end', x)
> list.insert(END, x)
>
>
> what do you use 'end' or END?

>>> from Tkinter import END
>>> END == 'end'
True

So this isn't really important... My personal usage varies: for your use  
case, I tend to use the symbolic constant (END); for sticky options in  
grids, I tend to use the strings ('nswe' is shorter than N+S+W+E, not to  
mention tk.N+tk.S+tk.W+tk.E).
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From mail at timgolden.me.uk  Thu Mar 29 11:30:53 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 Mar 2007 16:30:53 +0100
Subject: Finding User Profile path
In-Reply-To: <1175177689.254125.250390@b75g2000hsg.googlegroups.com>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>	<mailman.5745.1175154506.32031.python-list@python.org>	<1175173141.277735.192020@o5g2000hsb.googlegroups.com>	<mailman.5755.1175174512.32031.python-list@python.org>	<1175175904.199745.81460@y80g2000hsf.googlegroups.com>	<mailman.5756.1175177029.32031.python-list@python.org>
	<1175177689.254125.250390@b75g2000hsg.googlegroups.com>
Message-ID: <460BDBAD.4030403@timgolden.me.uk>

[resending as the original seems to have got lost;
apologies if it appears as a duplicate]

At the risk of insulting your intelligence, here's a
rough-and-ready non-AD solution (culled from some code I
had somewhere):

<code>
import win32net
import win32netcon

dc = win32net.NetGetAnyDCName (None, None)
#
# Or your specific server name, if you want
#

resume = 0
while 1:
   (_users, total, resume) = \
     win32net.NetUserEnum (
       dc,
       3,
       win32netcon.FILTER_NORMAL_ACCOUNT,
       resume,
       win32netcon.MAX_PREFERRED_LENGTH
     )
   for _user in _users:
     print _user['name'], _user['home_dir'], _user['profile']
   if not resume:
     break

</code>

TJG


From jon+usenet at unequivocal.co.uk  Sat Mar 10 12:53:37 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 10 Mar 2007 17:53:37 GMT
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
Message-ID: <slrnev5s51.44o.jon+usenet@snowy.squish.net>

In article <54CIh.6545$M65.2077 at newssvr21.news.prodigy.net>, John Nagle wrote:
>      As for "some modules not being maintained", it really is sad
> that MySQLdb is kind of behind.  If you're running Windows and need
> MySQL, you're either stuck with Python 2.4

Looks like that's changed:

http://sourceforge.net/project/showfiles.php?group_id=22307&package_id=15775


From aisaac at american.edu  Thu Mar 22 15:25:58 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 22 Mar 2007 19:25:58 GMT
Subject: design question: generator object with other attributes
Message-ID: <aLAMh.8608$EA.2582@trnddc07>

Essentially I want a generator that I can query about
its characteristics.  (E.g., a random number generator
that I want to be able to ask about is distributional
parameters.)

I am thinking of a class that wraps a generator.
An object of this class will have a ``next`` method that simply
returns the value the object get by calling the wrapped
generator.

A reasonable approach?

Thanks,
Alan Isaac

PS Here is a useless class to illustrate the basic idea
that you could have both attribute access and a
generator-connected ``next`` method.

class Start2Stop:
        def __init(start,stop):
                self.start = start
                self.stop = stop
                self.numgen = (i for in in xrange(start,stop))
        def next(self):
                return self.numgen.next()





From grante at visi.com  Fri Mar  9 11:20:21 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 09 Mar 2007 16:20:21 -0000
Subject: opinion needed
References: <1173454035.316124.307620@h3g2000cwc.googlegroups.com>
	<55df99F24658vU1@mid.uni-berlin.de>
Message-ID: <12v32a5ansp7p44@corp.supernews.com>

On 2007-03-09, Diez B. Roggisch <deets at nospam.web.de> wrote:
> azrael wrote:
>
>> id like to hear your opinion about something.
>> I just started using Prolog yesterday and i have my doubts about it,
>> but it seems to me something like object oriented. so i wanted to ask
>> you how usefull prolog is. Sure this is no prolog newsgroup so my
>> question is: because it seems object oriented, how important is it by
>> understanding python and improving my python skills. because i just
>> started it, i may bee totaly wrong or i missunderstood.
>
> OO? Prolog? Last time I checked it was much more functional if anything
> else, good for searching solutions in problem-spaces via backtracking.
> Certainly a concept one should get ones head wrapped around, if only to
> have a new perspective.
>
> No idea how you come to the conclusion it's OO though.

There apparently are OO Prolog extensions:

  http://sourceforge.net/projects/oopl/
  http://www.trinc-prolog.com/doc/pl_obj.htm
  
-- 
Grant Edwards                   grante             Yow!  These PRESERVES
                                  at               should be FORCE-FED to
                               visi.com            PENTAGON OFFICIALS!!


From yang at pyboo.com  Thu Mar  8 23:08:40 2007
From: yang at pyboo.com (=?gb2312?B?WXlTd2luZy7R7g==?=)
Date: Fri, 9 Mar 2007 12:08:40 +0800
Subject: I am a new guy on python world
Message-ID: <003501c76200$a1f3f3f0$6601a8c0@windskyf53b055>

I am study python today

print "Python world,yang coming"

lol
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 31 17:14:49 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 31 Mar 2007 23:14:49 +0200
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<mailman.5808.1175351247.32031.python-list@python.org>
Message-ID: <5781aaF2blrkvU1@mid.individual.net>

skip at pobox.com wrote:

> Why are you taking potshots at Mark? 

What suggests that I'm "taking potshots" at Mark?

> He's maybe onto something and he's asking for help.  If he can
> generate efficient C++ code from implicitly statically type Python
> it stands to reason that he can take advantage of the compiler's
> optimization facilities. 

Yes, compilers do output optimized machine code. But generally
calling that code "highly optimized" is, IMHO, exaggeration.

Regards,


Bj?rn

-- 
BOFH excuse #426:

internet is needed to catch the etherbunny



From ah at hatzis.de  Mon Mar 26 04:55:15 2007
From: ah at hatzis.de (Anastasios Hatzis)
Date: Mon, 26 Mar 2007 10:55:15 +0200
Subject: Pattern for foo tool <-> API <-> shell|GUI
In-Reply-To: <HuKdnW2Jh6ROF5vbnZ2dnUVZ_oOknZ2d@comcast.com>
References: <mailman.5552.1174753928.32031.python-list@python.org>
	<mailman.5567.1174779389.32031.python-list@python.org>
	<HuKdnW2Jh6ROF5vbnZ2dnUVZ_oOknZ2d@comcast.com>
Message-ID: <200703261055.15532.ah@hatzis.de>

On Sunday 25 March 2007 16:44, Steven Bethard wrote:
> Anastasios Hatzis wrote:
> > I'm working on a tool which is totally command-line based and consisting
> > of multiple scripts. The user can execute a Python script in the shell,
> > this script does some basic verification before delegating a call into my
> > tool's package and depending on some arguments and options provided in
> > the command-line, e.g.
> >     $python generate.py myproject --force --verbose
> > the tool processes whatever necessary. There are multiple command
> > handlers available in this package which are responsible for different
> > tasks and depending of the script that has been executed one or more of
> > these command handlers are fired to do their work ;)
>
> Side note: you might find argparse (http://argparse.python-hosting.com/)
>
> makes this a bit easier if you have positional arguments or sub-commands::

Steve, thank you, for the note. I didn't know argparse before. I have multiple 
scripts since optparse puts all arguments and options into one single help 
text, and the arguments and options are too specific for most commands (and 
thus the help would be absolutely overloaded and useless for new users). It 
seems that argparse has multiple help pages separated for each sub-command, 
as far as I understand the page.

>
> > And I don't think that this is very trivial (at least not for my
> > programming skill level). In the given example "generate.py" (above) the
> > following scenario is pretty likely:
> >
> > (1) User works with UML tool and clicks in some dialog a "generate"
> > button (2) UML tool triggers this event an calls a magic generate()
> > method of my tool (via the API I provide for this purpose), like my
> > generate.py script would do same way
> > (3) Somewhen with-in this generate process my tool may need to get some
> > information from the user in order to continue (it is in the nature of
> > the features that I can't avoid this need of interaction in any case).
>
> So you're imagining an API something like::
>
>      def generate(name,
>                   force=False,
>                   verbose=False,
>                   handler=command_line_handler):
>          ...
>          choice = handler.prompt_user(question_text, user_choices)
>          ...
>
> where the command-line handler might look something like::
>
>      class CommandLineHandler(object):
>          ...
>          def prompt_user(self, question_text, user_choices):
>              while True:
>                  choice = raw_input(question_text)
>                  if choice in user_choices:
>                      return choice
>                  print 'invalid choice, choose from %s' % choices
>
> and the GUI client would implement the equivalent thing with dialogs?

Exactly.

- Now, as I see your example, I wonder if this would work with a GUI which is 
event-driven... I have to look into my wx GUI prototype.

> That seems basically reasonable to me, though you should be clear in the
> documentation of generate() -- and any other methods that accept handler
> objects -- exactly what methods the handler must provide.
>
> You also may find that "prompt_user" is a bit too generic -- e.g. a file
> chooser dialog looks a lot different from a color chooser dialog -- so
> you may need to split this up into "prompt_user_file",
> "prompt_user_color", etc. so that handler's don't have to introspect the
> question text to know what to do...
>
> STeVe

Hey, right, good idea. I didn't think about the different task-specific 
dialogs in most GUIs. But I see that usability will gain benefit from 
differentiated "prompt" methods.

Anastasios


From zefirek at Speacock.Pau.Apoznan.Mpl  Thu Mar  1 04:35:07 2007
From: zefirek at Speacock.Pau.Apoznan.Mpl (zefciu)
Date: Thu, 01 Mar 2007 10:35:07 +0100
Subject: Converting a c array to python list
Message-ID: <es66m4$cnr$1@inews.gazeta.pl>

Hi!

I want to embed a function in my python application, that creates a
two-dimensional array of integers and passes it as a list (preferably a
list of lists, but that is not necessary, as the python function knows
the dimensions of this array).  As I read the reference, I see, that I
must first initialize a list object and then item-by-item put the values
to the list.  Is there any faster way to do it?  And is it worth to
implement?  The same problem is resolved in the current version by
calling a smaller c function (that counts just one element of the array)
many times.  Will it add much performance to the process?

zefciu


From "luca\" at (none)  Sun Mar 11 17:49:56 2007
From: "luca\" at (none) (none)
Date: Sun, 11 Mar 2007 22:49:56 +0100
Subject: Bitpacked Data
Message-ID: <45f47994$0$37205$4fafbaef@reader3.news.tin.it>

i need to interface python with a bitpacked data file,
the structure recorded in the file is the following:

struct {
var_1 4bit
var_2 6bit
var_3 2bit
var_3 4bit
}

how can read the struct and convert data into dictionary

Thnx


From arnodel at googlemail.com  Mon Mar  5 09:38:13 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 5 Mar 2007 06:38:13 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
Message-ID: <1173105492.632821.326810@n33g2000cwc.googlegroups.com>

On 5 Mar, 07:31, "Raymond Hettinger" <pyt... at rcn.com> wrote:
> I had an idea but no time to think it through.
> Perhaps the under-under name mangling trick
> can be replaced (in Py3.0) with a suitably designed decorator.
> Your challenge is to write the decorator.
> Any trick in the book (metaclasses, descriptors, etc) is fair game.

I had some time this lunchtimes and I needed to calm my nerves so I
took up your challenge :)
Here is my poor effort.  I'm sure lots of things are wrong with it but
I'm not sure I'll look at it again.

from types import MethodType, FunctionType

# The suggested localmethod decorator
class localmethod(object):
    def __init__(self, f):
        self.f = f
        self.defclass = None
        self.nextmethod = None
    def __get__(self, obj, objtype=None):
        callobj = obj or objtype
        if callobj.callerclass == self.defclass:
            return MethodType(self.f, obj, objtype)
        elif self.nextmethod:
            return self.nextmethod.__get__(obj, objtype)
        else:
            raise AttributeError

class BoundMethod(object):
    def __init__(self, meth, callobj, callerclass):
        self.meth = meth
        self.callobj = callobj
        self.callerclass = callerclass
    def __call__(self, *args, **kwargs):
        callobj = self.callobj
        try:
            callobj.callerclass = self.callerclass
            return self.meth(*args, **kwargs)
        finally:
            callobj.callerclass = None

# A 'mormal' method decorator is needed as well
class method(object):
    def __init__(self, f):
        self.f = f
        self.defclass = None
    def __get__(self, obj, objtype=None):
        callobj = obj or objtype
        return BoundMethod(MethodType(self.f, obj, objtype), callobj,
self.defclass)

class Type(type):
    def __new__(self, name, bases, attrs):
        for attr, val in attrs.items():
            if type(val) == FunctionType:
                attrs[attr] = method(val)
        return type.__new__(self, name, bases, attrs)
    def __init__(self, name, bases, attrs):
        for attr, val in attrs.iteritems():
            if type(val) == localmethod:
                val.defclass = self
                for base in self.mro()[1:]:
                    if attr in base.__dict__:
                        nextmethod = base.__dict__[attr]
                        val.nextmethod = nextmethod
                        break
            elif type(val) == method:
                val.defclass = self


class Object(object):
    __metaclass__ = Type
    # Note: any class or object has to have a callerclass attribute
for this to work.
    # That makes it thread - incompatible I guess.
    callerclass = None

# Here is your example code

class A(Object):
    @localmethod
    def m(self):
        print 'A.m'
    def am(self):
        self.m()

class B(A):
    @localmethod
    def m(self):
        print 'B.m'
    def bm(self):
        self.m()

m = B()
m.am()     # prints 'A.m'
m.bm()     # prints 'B.m'

# Untested beyond this particular example!

--
Arnaud



From andmarti at gmail.com  Sun Mar 18 22:04:44 2007
From: andmarti at gmail.com (Andres Martinelli)
Date: Sun, 18 Mar 2007 23:04:44 -0300
Subject: 4 bytes to int
Message-ID: <969033cd0703181904j2b3e8743m638de5f1bbeef980@mail.gmail.com>

Hello. Im new in the list, and really new in python.

My simple question is:
I have an array of 4 bytes, and I want to convert it to the int they form.
How do you do that? :s

I've looking throw the web, but with no success.
Hope you can help.

Andres M.
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From steve at holdenweb.com  Sat Mar 17 06:46:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 17 Mar 2007 06:46:17 -0400
Subject: Finding the insertion point in a list
In-Reply-To: <7xfy845q24.fsf@ruckus.brouhaha.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>	<7xird0bom3.fsf@ruckus.brouhaha.com>	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
	<7xfy845q24.fsf@ruckus.brouhaha.com>
Message-ID: <etgh0e$s29$1@sea.gmane.org>

Paul Rubin wrote:
> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>> or even
>>
>> len(filter(lambda t, y=y: y>t, x))
> 
> 
> How about 
> 
>    min(i for i,t in enumerate(x) if t >= y)
> 
> or
> 
>    max(i for i,t in enumerate(x) if t <= y)
> 
> Those are actually pretty direct.

How about a solution (like the bisect one suggested almost as soon as 
this thread started) that doesn't iterate over the whole list.

Having said which, for the promoted use cases I agree that the append() 
and sort() paradigm wins hands down until it starts to make a real and 
observable difference to the run time.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From ben at benfinney.id.au  Wed Mar 21 03:52:39 2007
From: ben at benfinney.id.au (Ben Finney)
Date: Wed, 21 Mar 2007 18:52:39 +1100
Subject: Unit testing daemon creation
Message-ID: <87wt1b3uew.fsf@benfinney.id.au>

Howdy all,

I'm in the process of creating a daemon program using Python. I know
that the program needs to 'os.fork()', then branch based on the return
value and either exit (if the parent) or continue (if the child).

How can I unit test that? That is to say, how can I programmatically
test that functionality of daemonisation from an external module which
imports the daemon module for testing?

I could be hackish and simply clobber the existing 'os.fork' for the
purpose of the unit test, making a stub function that returns the
appropriate values for the test. Is there a better way?

-- 
 \            "Beware of and eschew pompous prolixity."  -- Charles A. |
  `\                                                         Beardsley |
_o__)                                                                  |
Ben Finney



From gagsl-py2 at yahoo.com.ar  Tue Mar 27 16:13:30 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 Mar 2007 17:13:30 -0300
Subject: urllib timeout issues
References: <1175023315.536080.276550@n76g2000hsh.googlegroups.com>
Message-ID: <op.tpu6gsi2x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 Mar 2007 16:21:55 -0300, supercooper <supercooper at gmail.com>  
escribi?:

> I am downloading images using the script below. Sometimes it will go
> for 10 mins, sometimes 2 hours before timing out with the following
> error:
>
>     urllib.urlretrieve(fullurl, localfile)
> IOError: [Errno socket error] (10060, 'Operation timed out')
>
> I have searched this forum extensively and tried to avoid timing out,
> but to no avail. Anyone have any ideas as to why I keep getting a
> timeout? I thought setting the socket timeout did it, but it didnt.

You should do the opposite: timing out *early* -not waiting 2 hours- and  
handling the error (maybe using a queue to hold pending requests)

-- 
Gabriel Genellina



From siona at chiark.greenend.org.uk  Tue Mar 20 12:07:52 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 20 Mar 2007 16:07:52 +0000 (GMT)
Subject: Eureka moments in Python
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
	<1174053730.543334.138910@n59g2000hsh.googlegroups.com>
	<+tk*0oRFr@news.chiark.greenend.org.uk> <45FAE092.1090700@xxxx.xxx>
Message-ID: <C6o*2gaGr@news.chiark.greenend.org.uk>

Sion Arrowsmith  <siona at chiark.greenend.org.uk> wrote:
>This is more a "batteries included" eureka moment than a Python one,
>but writing a fetchmail substitute in 6 lines was an eye-opener.

On Fri, Mar 16, 2007 at 01:23:14PM -0500, someone emailed:
[This is a newsgroup/mailing list -- potentially useful information
like this should be shared, not taken to private email.]
> Would you mind sharing your fetchmail substitute code with me?  I'm
> curious to know what that looks like.

Unfortunately, I threw it away, as it was so trivial and I only needed
a one-shot solution. I kept meaning to come back to it and add some
configurability and error checking and such (and most importantly
providing an envelope From), but never did. The general idea is to
take the POP3 example from the library reference
(http://docs.python.org/lib/pop3-example.html) and replace the inner
for loop with "smtplib.SMTP('localhost').sendmail('', 'user',
'\n'.join(M.retr(i+1)[1]))"

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From stj911 at rock.com  Fri Mar  9 23:11:16 2007
From: stj911 at rock.com (stj911 at rock.com)
Date: 9 Mar 2007 20:11:16 -0800
Subject: *** The most profound and the most fragrant words ***
Message-ID: <1173499876.079288.91440@s48g2000cws.googlegroups.com>

The most profound and some of the most morally fragrant words by the
True jewish rabbis of the neturei karta ... please visit www.nkusa.org
for more information

When the fear of the Almighty is Absent All Becomes Permitted
including adulteries, 911 controlled demolitions and mass
murders .....
.......................................................
When the fear of the Almighty is Absent All Becomes Permitted

A Neturei Karta Statement on the Parade and Demonstration in Favor of
Moral Abominations in Jerusalem

November 9, 2006

The Glory of Mercy of the Almighty fills the universe. He is the
center of existence and of the lives of all men. We are summoned to
serve Him and obey His law in a spirit of joy and gratitude.

If this is done, all will be well. It will be well for us as
individuals and  as members of groups and nations and peoples.

The rejection of Divine Law and its good and just norms can only yield
tragedy.

Today in the Holy Land in the holy city of Jerusalem just such a
sorrowful tragedy is being played out. A march is planned that will
advance the absurd and evil notion that the most basic elements of
Divine moral law, accepted by all nations down through the ages, are a
source, not of peace and blessing but of "oppression," G-d forbid.

The public acceptance and assent to perversion as a "legitimate" way
of life is cruel and barbaric. It wars against the very decency that
lies at the root of life's spiritual and material bounty, purity and
happiness.

Thousands of Jews and many others have taken to the streets of
Jerusalem to protest this planned desecration.

But at root the desecration is a symptom of far greater evils. It is a
symptom of all the materialist rejections of the Divine that have
plagued our people over the last two centuries. This rejection has
spawned the evil of Zionism with its rejection of the Divine plan of
exile and redemption and its cruelty and arrogance towards other
nations.

Without the light and true kindness of Torah there will be, Heaven
forbid, rebellion and cruelty and, yes, perversion.

With humility and compassion in our hearts we humbly pray that those
Jews and all people ensnared by these evils should repent and realize
that they are the victims of pernicious propaganda. When returning to
Torah and the Divine plan they will find that which they seek, truth
and beauty, family and empathy and then and, only then, will they be
able to be truly gay, in the real sense of the word. May the Almighty
grant that it be so, speedily in our days.



From jantod at gmail.com  Sun Mar 11 10:35:58 2007
From: jantod at gmail.com (Janto Dreijer)
Date: 11 Mar 2007 07:35:58 -0700
Subject: threading and iterator crashing interpreter
In-Reply-To: <mailman.4939.1173619757.32031.python-list@python.org>
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
	<1173617253.901671.136910@q40g2000cwq.googlegroups.com>
	<mailman.4939.1173619757.32031.python-list@python.org>
Message-ID: <1173623758.054666.18190@s48g2000cws.googlegroups.com>

On Mar 11, 3:27 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 11 Mar 2007 09:47:34 -0300, Janto Dreijer <jan... at gmail.com>
> escribi?:
>
> > As far as I can tell I'm not running it from restricted mode
> > explicitly.
>
> This error is rather strange then:
>
> > > RuntimeError: instance.__dict__ not accessible in restricted mode
>
> "restricted mode" means that the current builtins are not the standard
> builtins.

Googling says "Some googling suggests that this error is a hint that a
Python object created in one subinterpreter is being used in a
different subinterpreter."

> > The reason I'm doing the random.choice() is so I don't have a handle
> > ("session" in this case) that would prevent it from being garbage
> > collected. I am not bothered by the Python-level Exceptions. I am
> > bothered by the interpreter throwing a segfault. What I suspect is
> > happening is the Session object is deallocated, while it still has a
> > reference from within the iterator.
>
> But on your code Session objects are never deleted; they stay inside
> System.sessions. Having an extra reference (the session variable) doesnt
> matter.

Hmmm. You're right.

> > It's quite difficult to reproduce these bugs consistently. You might
> > need to run it a few times.
>
> At least, the problem of using the same generator from different threads
> still remains, if you don't use my modified code. In general, when using
> multiple threads you always need some way to syncronize access to shared
> objects. You are lucky with Sessions because append is an atomic operation
> on lists; for more information see  http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-threa...

Again you're right. But even putting a try-except:return around the
random.choice still manages to break the interpreter. I'm not looking
for any meaningful output really. I just want it not to break.

Like I said, this is just watered down code to try and isolate the
problem.



From lbates at websafe.com  Mon Mar 12 10:18:33 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 12 Mar 2007 09:18:33 -0500
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
Message-ID: <dPKdnY6t876o_GjYnZ2dnUVZ_vjinZ2d@comcast.com>

Frank wrote:
> Hi,
> 
> does anyone know how one can test if, e.g., a dictionary 'name' has a
> key called 'name_key'?
> 
> This would be possible:
> 
> keys_of_names = names.keys()
> L = len(keys_of_names)
> 
> for i in range(L):
> if keys_of_names[i] == name_key:
> print 'found'
> 
> 
> But certainly not efficient. I would expect there is something like:
> 
> name.is_key(name_key)
> 
> I appreciate your help!
> 
> Frank
> 
Others have posted the direct answer but often you are wanting to
do something with the key if it exists and the best method is:

try: names['name_key']+=1
except KeyError:
   #
   # Key doesn't exist, create it, display error, or whatever you want
   # to do if it doesn't exist.
   #

-Larry


From sgeiger at ncee.net  Wed Mar 14 11:35:02 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Wed, 14 Mar 2007 10:35:02 -0500
Subject: number generator
In-Reply-To: <1173861843.878008.83090@p15g2000hsd.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>	<7x7itqqxlh.fsf@ruckus.brouhaha.com>	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>	<pan.2007.03.09.15.32.01.112493@gmx.net>	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<1173861843.878008.83090@p15g2000hsd.googlegroups.com>
Message-ID: <45F81626.1030708@ncee.net>

Raymond:   It looks to me as if you are trying to turn a generator into 
a list in the final line.  That doesn't work.



Raymond Hettinger wrote:
>> To make the solutions equi-probable, a simple approach is to
>> recursively enumerate all possibilities and then choose one of them
>> with random.choice().
>>     
>
> Since people are posting their solutions now (originally only hints
> were provided for the homework problem), here's mine:
>
> def genpool(n, m):
>     if n == 1:
>         yield [m]
>     else:
>         for i in xrange(1, m):
>             for rest in genpool(n-1, m-i):
>                 yield rest + [i]
>
> import random
> print random.choice(list(genpool(n=4, m=20)))
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From bert.heymans at gmail.com  Fri Mar 16 11:06:35 2007
From: bert.heymans at gmail.com (Bert Heymans)
Date: 16 Mar 2007 08:06:35 -0700
Subject: Python shell on mac os x
In-Reply-To: <1hv1966.1poigs11f692njN%aleax@mac.com>
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
	<1hv1966.1poigs11f692njN%aleax@mac.com>
Message-ID: <1174057595.088183.102580@n76g2000hsh.googlegroups.com>

On Mar 16, 4:08 am, a... at mac.com (Alex Martelli) wrote:
> Bert Heymans <bert.heym... at gmail.com> wrote:
> > Hi!
>
> > I'm using iTerm on the mac the keymapping isn't right. On Linux and
> > Windows it's really nice to be able to hit up to get the previous
> > command. Does anyone know a way to get the Pyhton shell to work like
> > on other systems, I always get this when I hit the direction keys:
>
> > >>> ^[OA^[OC^[OD
>
> > I've been looking for the correct mappings but can't find a proper
> > reference online nor what the Python shell expects. Any help would be
> > greatly appreciated! Hints/suggestions on keywords to use in a search
> > on Google are always welcome :) I don't know where to begin looking
> > for this kind of information.
>
> The Python 2.3.5 bundled with MacOSX doesn't come with readline.
> Download 2.5 (or if you must 2.4) for the Mac fromwww.python.organd
> live happily ever after.
>
> E.g. (I'm hitting an up-arrow the 2nd time, then control-D next time):
>
> brain:~ alex$ python2.3
> Python 2.3.5 (#1, Jan 13 2006, 20:13:11)
> [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.>>> 2+2
> 4
> >>> ^[[A
>
>   File "<stdin>", line 1
>     ^
> SyntaxError: invalid syntax>>> ^D
>
> brain:~ alex$ python2.4
> Python 2.4.3 (#1, Apr  7 2006, 10:54:33)
> [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.>>> 2+2
> 4
> >>> 2+2
> 4
>
> brain:~ alex$
>
> Alex

Wow, thanks for pointing that out Alex! I wasn't even hoping a
solution could be that simple :s



From MonkeeSage at gmail.com  Fri Mar  2 18:29:02 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 15:29:02 -0800
Subject: class declaration shortcut
In-Reply-To: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
Message-ID: <1172878142.169464.161690@31g2000cwt.googlegroups.com>

On Feb 28, 1:26 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
> I've come across a code snippet in www.rubyclr.com where they show how
> easy it is to declare a class compared to equivalent code in c#.
> I wonder if there is any way to emulate this in Python.

I posted like 10 minutes ago, but it looks like it didn't go through.
The ruby code is not an easy way to declare a class, it is a ruby
class for creating c-like struct objects.

This is the basic idea behind the ruby Struct class (but this is quick
and dirty, the real implementation is different and done in c, but you
should get the basic idea):

class Struct2
    def initialize(*args)
        @@attrs = []
        args.each { |arg|
            eval("class << self; attr_accessor :#{arg} end")
            @@attrs.push(arg)
        }
    end
    def new(*args)
        args.each_index { |i|
            eval("self.#{@@attrs[i]}=args[i]")
            return self
        }
    end
end

Person = Struct2.new(:name)
bob = Person.new('bob')
puts bob.name


A python equiv. would be something like:

class Struct():
    def __init__(self, *args):
        self.attrs = []
        for arg in args:
            setattr(self, arg, None)
            self.attrs.append(arg)
    def __call__(self, *args):
        for i in range(len(args)):
            setattr(self, self.attrs[i], args[i])
        return self

Person = Struct('name')
bob = Person('bob')
print bob.name

Regards,
Jordan



From jan.m.danielsson at gmail.com  Mon Mar  5 04:42:47 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Mon, 05 Mar 2007 10:42:47 +0100
Subject: Mod python - mysql lock
In-Reply-To: <1173086638.769972.254300@t69g2000cwt.googlegroups.com>
References: <1173086638.769972.254300@t69g2000cwt.googlegroups.com>
Message-ID: <45ebe618$1@griseus.its.uu.se>

Roopesh wrote:
> In my mod_python project I am using mysql as the database. There is
> table card in which unique cards are stored. When a user request comes
> he has to get a unique card. In this situation I want to use LOCK with
> which I can prevent other users accessing the table. I tried excuting
> "LOCK" command of mysql through python code, but it is not locking the
> database. Any ideas why this isn't working and how can I do the same.
> 
> //python code
> sql = "LOCK TABLES card WRITE"
> cursor.execute(sql)

   How have you verified that the lock isn't actually working?

   From http://dev.mysql.com/doc/refman/5.0/en/lock-tables.html:

   "UNLOCK TABLES explicitly releases any locks held by the current
thread. All tables that are locked by the current thread are implicitly
unlocked when the thread issues another LOCK TABLES, or when the
connection to the server is closed."

   Note the last part -- the lock is apparently released when the
connection is closed. Is that perhaps what is happening? Remember that
once your request is done in mod_python, it will (probably) release any
allocated resources, which means that your connection will be closed,
and your lock released, if it wasn't previously.

   Database locks are, generally, bad. Avoid them, and only use them
when they really are the only solution.

   From what little information you supply, it seems that what you need
is simply automatic id generation. Essentially you to do this:

INSERT INTO foobar (title) VALUES ('yuck')

SELECT LAST_INSERTED_ID()

   foobar needs to have an auto_increment column, and LAST_INSERTED_ID()
is probably called something else (long time since I used MySQL).

   This is actually more of a MySQL question. Or even a generic database
design question. I would suggest you try asking in a more appropriate forum.

-- 
Kind regards,
Jan Danielsson


From B.Ogryczak at gmail.com  Wed Mar 21 10:16:53 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 21 Mar 2007 07:16:53 -0700
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
Message-ID: <1174486612.969808.131930@l75g2000hse.googlegroups.com>

On Mar 21, 2:36 pm, "flit" <superf... at gmail.com> wrote:
> Now the technical question:
>
> 1 - There is a way to make some program in python and protects it? I
> am not talking about ultra hard-core protection, just a simple one
> that will stop 90% script kiddies.

Freeze. That should be hard enough for 99% of users.

> 2 - If I put the code in web like a web service, how can I protect my
> code from being ripped? There is a way to avoid someone using my site
> and ripping the .py files?

That's more of a question about the security of that particular
server. Normally if the server is well set up, there is no way that
unauthorized user could access source code form outside.




From dnwurtz at gmail.com  Mon Mar 12 08:21:21 2007
From: dnwurtz at gmail.com (HeEm)
Date: 12 Mar 2007 05:21:21 -0700
Subject: Single string print statements on multiple lines.
Message-ID: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>

In my 100 level CS course, I was asked to create multiple lines of
output within a single string.  Of course I know how to:

print "I am"
print "a python"
print "newbie."

How can I get this accomplished using a single string (assuming this
means a one line statement).  Is there and escape character or
something that could be added?

Thanks for any help that can be provided.



From maxsteel at gmail.com  Fri Mar 30 19:19:32 2007
From: maxsteel at gmail.com (Max Steel)
Date: Fri, 30 Mar 2007 18:19:32 -0500
Subject: New to Python - Easy way to open a text file
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
	<1175270675.296617.83380@e65g2000hsc.googlegroups.com>
	<pan.2007.03.30.16.39.12.89800@gmx.net>
	<1175282893.015117.154310@l77g2000hsb.googlegroups.com>
	<iYCdnXKeYrYe9pDbnZ2dnUVZ_rWnnZ2d@giganews.com>
	<1175289887.510619.166280@e65g2000hsc.googlegroups.com>
Message-ID: <saudnafaBbdiB5DbnZ2dnUVZ_qmpnZ2d@giganews.com>

Nope. that's not what i mean...

Here's a quick run down:

edna, is a python mp3 server. (.py)

What it does is searches directories for:
1) mp3s
2) jpgs
3) mp3us
4) txt files
5) other folders

What I'd like it to do, is upon finding a folder, with a .txt file in it (in 
my case is probably an album review from AMG), is to take the contents of 
that text file and display it on the same page as the album, the artwork 
etc..

I think the gang that has helped me so far, is pointing me in the right 
direction.  I just need to figure out how this template is used.

I'll have some time on sunday to play with the "simple" code that they've 
provided.  I will post my results.

Thanks again to all who has helped me thus far,
.\\ax

"Michael Tobis" <mtobis at gmail.com> wrote in message 
news:1175289887.510619.166280 at e65g2000hsc.googlegroups.com...
>I think it's pretty clear that we aren't understanding what you mean
> by "open a text file and disply its content".
>
> I conclude that by "edna" you mean this thing: 
> http://edna.sourceforge.net/
>
> I suspect you are not asking a Python question at all.
>
> Did you try opening
>
> file:///<path-to-edna>/edna-0.6/templates/default.ezt
>
> in your browser? This will show you the design of your (unpopulated)
> template rendered in your browser.
>
> Notes:
>
> 1) yes you do need three slashes after "file:" for some reason I've
> never comprehended
> 2) you will need to replace <path to browser> with your local system
> path to the edna directory. (In firefox you can, alternatively, browse
> to the file from File->open; Safari will balk at the ezt extension; I
> don't know what other browsers will do.)
>
> If this is more like what your are after, consider that your question
> was misleading (and entirely unrelated to Python). The edna miling
> list is here:
> http://www.lyra.org/mailman/listinfo/edna
>
> hth
> mt
> 




From siona at chiark.greenend.org.uk  Wed Mar 21 10:05:00 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 21 Mar 2007 14:05:00 +0000 (GMT)
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
Message-ID: <4Rf*J7eGr@news.chiark.greenend.org.uk>

Jon Ribbens  <jon+usenet at unequivocal.co.uk> wrote:
>You want:
>
>  if sys.hexversion < 0x020400f0:
>    ... error ...


"Readability counts."

if sys.version_info < (2, 4):
    ... error ...

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From aleax at mac.com  Sun Mar 18 19:32:17 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 16:32:17 -0700
Subject: Trying to print from inside a method
References: <1174256116.872955.180040@l77g2000hsb.googlegroups.com>
Message-ID: <1hv6is1.icavxo1xmrwhpN%aleax@mac.com>

<AWasilenko at gmail.com> wrote:

> I'm still in the process of learning python via a handful of books I
> bought.  One book I am reading just introduced Base Class Methods.  I

I believe your problem may be more basic: local variables, istance
attributes, and class variables, are very separate things.

> found that I needed more understanding on this concept and wrote a
> short test program using the Author's code as a vague reference.  My
> question now really isn't Base Class related, but my question stems
> from my test code so I will just post it as is.
> 
> ##Test of Super() stuff
> class First(object):
> 
>     def __init__(self, wamba, nextel):
>         self.wamba = wamba
>         self.nextel = nextel
>         message1 = "This is message 1"
>         print  message1
> 
>     def message22(self):
>         message2 = "This is message 2"
>         print message2

Here, the message1 and message2 names are LOCAL variables of the
respective methods: each disappear as soon as its method ends.

If you want to make them into INSTANCE attributes, so they'll stick
around for later, assign to self.message1 and self.message2 instead (and
of course use these composite names too if need be).

> Traceback (most recent call last):
>   File "<pyshell#39>", line 1, in -toplevel-
>     print test1.message22.message2
> AttributeError: 'function' object has no attribute 'message2'

this would require making message2 an attribute of another attribute
called message22 -- i.e., the function itself (methods don't have
attributes, but their underlying functions can; the difference is that
separate instances of the method refer to the same underlying function,
so they would all share the same attribute).

IOW, you'd have in the body of message22 to write:

  self.message22.mesage2 = whatever

This would be pretty weird, but legal Python.

This would only work if you CALLED test1.message22() at some point, of
course; the method's body is not executed until you call it.  If you
want this attribute to appear w/o the need to call the method, you need
to assign it in the body of class First after the end of the def for
message22:

  def message22(self): ...whatever...

  message22.message2 = ...whatever else...

Weirder and weirder, but still legal Python.

> >>> print test1.message2
> 
> Traceback (most recent call last):
>   File "<pyshell#40>", line 1, in -toplevel-
>     print test1.message2
> AttributeError: 'First' object has no attribute 'message2'

And this is the one you'd solve by having, in the method's body,

  self.message2 = ...blah blah...

but only after the method has been called (move this assignment to
__init__ if you want it to take action without need to call the method).

> >>> print First.message22.message2
> 
> Traceback (most recent call last):
>   File "<pyshell#41>", line 1, in -toplevel-
>     print First.message22.message2
> AttributeError: 'function' object has no attribute 'message2'

This, again, you'd fix by assigning to the attribute of function
message22, just like the very first case.


To recap: attributes can be accessed on the objects you have assigned
them too (with some latitude: you can access on an instance an attribute
of its class or any baseclass thereof, you can access on a method an
attribute of is underlying function).  Local variables -- assignment you
do within a function (or method) to bare names -- disappear as soon as
the method (or function) is done executing.


Alex


From bignose+hates-spam at benfinney.id.au  Tue Mar 20 07:43:56 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 20 Mar 2007 22:43:56 +1100
Subject: Load three different modules which have the same name
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
Message-ID: <87wt1c5edf.fsf@benfinney.id.au>

"abcd" <codecraig at gmail.com> writes:

> nevermind this took care of it:
>
> import sys
>
> def tryAllThree():
>     a = "c:\\alpha"
>     b = "c:\\beta"
>     g = "c:\\gamma"
>
>     sys.path.append(a)
>     import Person
>     alpha = Person.Person()

To avoid this confusion, follow PEP 8
<URL:http://www.python.org/dev/peps/pep-0008/>; in particular, name
your classes with TitleCase and name your modules (i.e., name the
files that contain the code) with lowercase.

    import person
    alpha_person = person.Person()

As to the original question, you've already seen the answer:

    from alpha import person
    alpha_person = person.Person()

    from beta import person
    beta = person.Person()

    from gamma import person
    gamma_person = person.Person()

-- 
 \          "If I ever get real rich, I hope I'm not real mean to poor |
  `\                           people, like I am now."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From tiedon_jano at hotmail.com  Tue Mar  6 12:34:36 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 06 Mar 2007 17:34:36 GMT
Subject: askstring Window to the top under Windows
In-Reply-To: <TzhHh.193$c62.95@read3.inet.fi>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<1173188906.327302.291650@s48g2000cws.googlegroups.com>
	<1173194286.807112.180370@c51g2000cwc.googlegroups.com>
	<TzhHh.193$c62.95@read3.inet.fi>
Message-ID: <MChHh.194$c62.83@read3.inet.fi>

Jussi Salmela kirjoitti:
>
><snip>
> 
> Every GUI implementation has a command loop and things to initiate the 
OOPS:                          an EVENT loop

Cheers,
Jussi


From danb_83 at yahoo.com  Sat Mar 10 13:21:24 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 10 Mar 2007 10:21:24 -0800
Subject: unsigned integer?
In-Reply-To: <Xns98EFB589C63E9duncanbooth@127.0.0.1>
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<Xns98EFB589C63E9duncanbooth@127.0.0.1>
Message-ID: <1173550883.899624.88730@c51g2000cwc.googlegroups.com>

On Mar 10, 11:50 am, Duncan Booth <duncan.bo... at invalid.invalid>
wrote:
> "Jack" <nos... at invalid.com> wrote:
> > This is a naive question:
>
> > "%u" % -3
>
> > I expect it to print 3. But it still print -3.
>
> Internally it uses the C runtime to format the number, but if the number
> you ask it to print unsigned is negative it uses %d instead of %u. I have
> no idea if it is actually possibly to get a different output for %d versus
> %u.

%u used to be different from %d, but it changed because of the int/
long unification in Python 2.4.



From stargaming at gmail.com  Tue Mar 20 15:43:38 2007
From: stargaming at gmail.com (Stargaming)
Date: Tue, 20 Mar 2007 20:43:38 +0100
Subject: How to copy a ClassObject?
In-Reply-To: <Xns98F993D63F87Dmosornet@161.53.160.64>
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
	<Xns98F993D63F87Dmosornet@161.53.160.64>
Message-ID: <etpdhc$1gbh$1@ulysses.news.tiscali.de>

Karlo Lozovina schrieb:
> Karlo Lozovina <_karlo_ at _mosor.net_> wrote in
> news:Xns98F98FEF2B9A6mosornet at 161.53.160.64: 
> 
> 
>>how would one make a copy of a class object? Let's say I have:
>>  class First:
>>    name = 'First'
>>
>>And then I write:
>>  tmp = First
> 
> 
> Silly me, posted a question without Googling first ;>. This seems to be 
> the answer to my question:
> 
> import new
> class First:
>     name = 'First'
> tmp = new.classobj('tmp', (First,), {})
> 
> After this, tmp is a copy of First, and modifying tmp.name will not affect 
> First.name.
> 
> P.S.
> If my code is somehow mistaken and might not function properly in all 
> cases, please correct me. 
> 
> Bye,
> klm.
> 
Leave out the `new` module and use `type()` (exactly the same call as to 
`new.classobj`) to achieve the same effect.


From lucastorri at gmail.com  Mon Mar 12 13:33:05 2007
From: lucastorri at gmail.com (Lucas Torri)
Date: Mon, 12 Mar 2007 14:33:05 -0300
Subject: backslashes in lists
In-Reply-To: <BAY126-W180C94A3AFF8B3B6C57D78D37D0@phx.gbl>
References: <BAY126-W180C94A3AFF8B3B6C57D78D37D0@phx.gbl>
Message-ID: <b58273130703121033p7c1c763ap7d433f2f3515002a@mail.gmail.com>

hehe, s? vendo o ['Arquivo de configuracao da arquitetura'] da pra ver que ?
brasileiro =)

I didn't undestand, what didn't worked?

I've tryied this, and all went ok:

>>> list1 = ['name', 'value']
>>> list2 = ['path', 'c:\some\path']
>>> list3 = [list1, list2]
>>>
>>> print str(list3).replace('\\\\','\\')
[['name', 'value'], ['path', 'c:\some\path']]

On 3/12/07, Fabio Gomes <flgoms at hotmail.com> wrote:
>
>  It didn't work. I decided to submit the code in the list.
>
> It is a script running with Jython to modify some configurations in the
> Websphere Application Server that has a Java like command line that
> interprets jython or jacl. I decided to use Jython.
>
> All the properties in that server are stored in hierarchy in the form of
> lists into lists. An exemple of one of the properties follows:
>
> ['systemProperties', [[['description', 'Arquivo de configuracao da
> arquitetura'], ['name', 'A_INI'], ['required', 'false'], ['value',
> '/xml/a_ini.xml']], [['description', 'Raiz do Ambiente'], ['name',
> 'A_ROOT'], ['required', 'false'], ['value', 'file://D:\\A\\D9']]]]
>
> All above in a single string.
>
> To make the things easier to me and the other people who will read that
> script, I decided to declare each subset of lists separatly. Something like
> that:
>
> list1 = ['name', 'value']
> list2 = ['path', 'c:\some\path']
> list3 = [list1, list2]
>
> But doing that, list2 will be parsed by repr() and will receive an extra
> '\' when inserted int list3, messing up with the path information. I need
> some aproach to build that string without have to write it in one long and
> confuse string. Maybe hash tables will be the answer. I need to read about
> it.
>
> The entire code follows, remembering you that AdminConfig is an object
> present only in the WebSphere:
>
>
> #
> # Creates the JVM custom properties A_INI and A_ROOT
> #
>
> # Custom Properties
> attr1_desc     = ['description', 'Arquivo de configuracao da arquitetura']
> attr1_name     = ['name', 'A_INI']
> attr1_required = ['required', 'false']
> attr1_value    = ['value', '/xml/a_ini.xml']
> attr1_List     = [attr1_desc, attr1_name, attr1_required, attr1_value]
>
> attr2_desc     = ['description', 'Raiz do Ambiente']
> attr2_name     = ['name', 'A_ROOT']
> attr2_required = ['required', 'false']
>
> # ID of all application servers
> allServers = AdminConfig.getid('/Server:/')
>
> import  java
> lineSeparator = java.lang.System.getProperty('line.separator')
>
> arrayAllServers = allServers.split(lineSeparator)
>
> # processing for each server
> for serverID in arrayAllServers:
>   # bypass if it isn't an (real) application server
>   if AdminConfig.showAttribute(serverID, 'name') == 'dmgr':
>     continue
>   if AdminConfig.showAttribute(serverID, 'name') == 'nodeagent':
>     continue
>   if AdminConfig.showAttribute(serverID, 'name') == 'webserver':
>     continue
>
>   serverName = AdminConfig.showAttribute(serverID, 'name')
>
>   print 'Atualizando o servidor', serverName, '...'
>
>   jvm = AdminConfig.list('JavaVirtualMachine', serverID)
>
>   path = 'file://D:\\A\\' + serverName[5:]
>   attr2_value = ['value', path]
>   attr2_List  = [attr2_desc, attr2_name, attr2_required, attr2_value]
>   attr_List   = [attr1_List, attr2_List]
>   property    = ['systemProperties', attr_List]
>
>   AdminConfig.modify(jvm, [property])
>
> print 'Salvando configuracoes...'
> AdminConfig.save()
>
> #EOF
>
>
>
> ------------------------------
> Date: Mon, 12 Mar 2007 13:40:58 -0300
> From: lucastorri at gmail.com
> To: flgoms at hotmail.com
> Subject: Re: backslashes in lists
> CC: python-list at python.org
>
> just like the same way, but replace alist -> list:
>
> str(list).replace('\\\\','\\')
>
>
> as the time you call str(object) you will have an object of type string,
> and you can do whatever you want/could do with it...
>
>
> what are you trying?! isn't more interesting use a hash table?
>
> On 3/12/07, *Fabio Gomes* <flgoms at hotmail.com > wrote:
>
>  Nice, Lucas.
>
>   But help me again, please. What about "echoing" the list:
>
> >>> str(alist).replace('\\\\','\\')
> "['a', 'b', 'c:\\some\\path']"
>
>   Because in my script I'm echoing the list to mount lists into lists,
> like:
>
> >>> list1 = ['name', 'test']
> >>> list2 = ['path', 'c:\some\path']
> >>> list = [list1, list2]
> >>> print list
> [['name', 'test'], ['path', 'c:\\some\\path']]
>
>   That's how it is coded in my script. What do you think. Is it possible
> to print "list" without the doubled backslash?
>
>   Thank again, Lucas.
>
>
> ------------------------------
> Date: Mon, 12 Mar 2007 12:15:10 -0300
> From: lucastorri at gmail.com
> To: flgoms at hotmail.com
> Subject: Re: backslashes in lists
> CC: python-list at python.org
>
> I don't know how ugly this look like, but { print
> str(alist).replace('\\\\', '\\') } works...
>
> On 3/12/07, * Fabio Gomes* <flgoms at hotmail.com> wrote:
>
>  Yes, Luca.
>
>   I noticed that printing the list item will show the string as expected.
> But I need to print the entire list in the script I'm writing and doing
> that, the list will will be repr()'ed. Is there any way to print the entire
> list without being parsed by repr()?
>
>
>
> ------------------------------
> Date: Mon, 12 Mar 2007 12:00:19 -0300
> From: lucastorri at gmail.com
> To: flgoms at hotmail.com
> Subject: Re: backslashes in lists
> CC: python-list at python.org
>
> The backslash is a key to enter especial characters, like breakline: '\n'
>
> There is two backslashes cause of this especial condition of this char,
> but if you try print the specific string you will see that only one
> backslash remain:
>
> print alist[2]
>
> On 3/12/07, *Fabio Gomes* <flgoms at hotmail.com > wrote:
>
>  Hi list,
>
>   I'm trying to use a string with backslashes in a list. But Python parses
> strings in lists with repr().
>
>
> >>> alist = ['a', 'b', 'c:\some\path']
> >>> alist
> ['a', 'b', 'c:\\some\\path']
> >>> print alist
> ['a', 'b', 'c:\\some\\path']
>
>
>   I already tried str() and raw (r) but it didn't work. All I want is to
> keep a single backslash in the string since it is a path information.
>
>   Can anyone help me, please?
>
>   Thank you.
>
> ------------------------------
> O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na
> Web e sua rede amigos. Confira! <http://spaces.live.com/signup.aspx>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
>
> ------------------------------
> Busque em qualquer p?gina da Web com alta prote??o. Obtenha o Windows Live
> Toolbar GRATUITO ainda hoje! Experimente agora! <http://toolbar.live.com/>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
>
> ------------------------------
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> Web e sua rede amigos. Confira! <http://spaces.live.com/signup.aspx>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
>
> ------------------------------
> Ligue para os seus amigos gr?tis. Fa?a chamadas de PC-para-PC pelo
> messenger-- GR?TIS Experimente agora!<http://get.live.com/messenger/overview>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From nagle at animats.com  Mon Mar 19 15:08:55 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 19 Mar 2007 12:08:55 -0700
Subject: Anything available that can read Microsoft .MDB files from Python?
Message-ID: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>

   I'm looking for something that can read .MDB files, the format
Microsoft Access uses, from Python.  I need to do this on
Linux, without using Microsoft tools.  I just need to read
the files once, so I can load the tables into another database.
Speed isn't an issue, and I don't need to access the file in
database fashion.  The files are too big to read into RAM all at once,
though.

   I tried "MDBtools", but the only (last) release was
a pre-release three years ago, and I've encountered
many build problems trying to make it work on Fedora
Core 6.

				John Nagle


From bignose+hates-spam at benfinney.id.au  Thu Mar 22 22:10:53 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 23 Mar 2007 13:10:53 +1100
Subject: class / instance question
References: <96B6F7A8-E09A-433B-ACC8-EF90A66DBEC8@cs.hmc.edu>
Message-ID: <874poc3e1e.fsf@benfinney.id.au>

belinda thom <bthom at cs.hmc.edu> writes:

> I've written two game classes---Nim and TicTacToe---where each
> derives from a Game class that I've created (it is essentially an
> abstract base class, where I've used an "abstract()" hack to
> somewhat enforce this).

You can use the 'NotImplemented' built-in object, or the
'NotImplementedError' exception, for this purpose:

    class BaseFoo(object):
        """ Abstract base class for Foos """
        def bar(self):
            """ Method which must be overridden in subclass """
            raise NotImplementedError("bar() must be overridden")

    class FrobulatingFoo(BaseFoo):
        """ A Foo that frobulates """
        def bar(self):
            print "Frobulating..."
            print " done."

> I now want to be able to pass either of these classes into a game-
> playing engine, for instance a function
>
> playGame(classOfGameToBePlayed) :
>     # inside of which I create a new game using that class's constructor
>
> Is this possible, and if so, how to approach it?

It works just as you describe. The class is an object, that can be
passed as an argument just like any other object. That object is
callable, and invokes the class constructor to return a new instance
of the class.

    def play_game(game_class):
        """ Play a new game """
        game = game_class()
        game.start_play()

-- 
 \        "The number of UNIX installations has grown to 10, with more |
  `\     expected."  -- Unix Programmer's Manual, 2nd Ed., 12-Jun-1972 |
_o__)                                                                  |
Ben Finney



From http  Thu Mar 15 23:05:03 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 19:05:03 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
Message-ID: <7xtzwldh28.fsf@ruckus.brouhaha.com>

"n00m" <n00m at narod.ru> writes:
> http://www.spoj.pl/problems/SUMFOUR/
> 3
> 0 0 0 0
> 0 0 0 0
> -1 -1 1 1
> Answer for this input data is 33.

f = open('input1')
npairs = int(f.readline())

quads = [map(int, f.readline().split()) for i in xrange(npairs)]
assert len(quads) == npairs

da = {}

for p in quads:
    for q in quads:
        z = p[2] + q[3]
        da[z] = da.get(z,0) + 1

print sum([da.get(-(p[0]+q[1]), 0) for p in quads for q in quads])


From tom1188 at removethis.verizon.net  Mon Mar  5 09:18:16 2007
From: tom1188 at removethis.verizon.net (tom)
Date: Mon, 05 Mar 2007 14:18:16 GMT
Subject: Can Epydoc exclude wxPython?
Message-ID: <IEVGh.365$iD4.187@trnddc06>

I would like to use Epydoc (3.0beta1) to document my wxPython (2.6.10) 
application.  The problem is that I can't seem to instruct Epydoc to not 
also generate partial documentation of wxPython, which makes too much 
verbiage for a user to wade through in order see the documentation of my 
program.

For example, if my module consists of only the three lines

import wx
class BasicPanel(wx.Panel):
     pass

the generated documentation for BasicPanel is completely swamped by the 
over 100 instance methods and static methods for wx._core.Window, etc.

I've tried using the "exclude" command in a config file and command line 
and also sprinkling around "@undocumented" commands in the .py file. 
Neither of these make any difference as far as I can see, but they 
aren't documented well in Epydocs so I'm not completely sure that I'm 
using them correctly, although I've tried many, many variations all to 
no avail.  I've also tried turning off introspection and/or parsing, but 
then the Epydoc output isn't as good.

Does anyone know of a way to avoid this?  Short of fixing this in 
Epydoc, how about a different documentation package -- I chose Epydoc 
because it included clickable inheritance trees in the docs.  Is there 
another package that does this?

I installed Epydoc using epydoc-3.0beta1.win32.exe on Windows XP and am 
using Python 2.4.3.

Thanks for any help,
Tom

P.S. -  I haven't found any other group or mailing list that might be a 
more focused forum for this question.  Please let me know if you know of 
one.


From bwillems at optonline.net  Fri Mar  9 16:35:59 2007
From: bwillems at optonline.net (Bart Willems)
Date: Fri, 09 Mar 2007 16:35:59 -0500
Subject: Python-list Digest, Vol 42, Issue 117
In-Reply-To: <mailman.15559.1173404093.32030.python-list@python.org>
References: <mailman.15559.1173404093.32030.python-list@python.org>
Message-ID: <45F1D33F.1050909@optonline.net>

I'm sorry, but what's wrong with:
radix = [ [] ] * 256

Cheers,
Bart

"John"  writes:
>> For my code of radix sort, I need to initialize 256 buckets. My code looks a 
>> little clumsy:
>>
>> radix=[[]]
>> for i in range(255):
>>     radix.append([])
>>
>> any better code to initalize this list? 
>>     
>
> Typically you'd say 
>    radix = [[] for i in xrange(256)]
>
>   




From cfbolz at gmx.de  Tue Mar 27 17:48:11 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Tue, 27 Mar 2007 23:48:11 +0200
Subject: PyPy 1.0: JIT compilers for free and more
Message-ID: <euc3er$bif$1@sea.gmane.org>

==========================================
PyPy 1.0: JIT compilers for free and more
==========================================

Welcome to the PyPy 1.0 release - a milestone integrating the results
of four years of research, engineering, management and sprinting
efforts, concluding the 28 months phase of EU co-funding!

Although still not mature enough for general use, PyPy 1.0 materializes
for the first time the full extent of our original vision:

- A flexible Python interpreter, written in "RPython":

   - Mostly unaware of threading, memory and lower-level target platform
     aspects.
   - Showcasing advanced interpreter features and prototypes.
   - Passing core CPython regression tests, translatable to C, LLVM and 
.NET.

- An advanced framework to translate such interpreters and programs:

   - That performs whole type-inference on RPython programs.
   - Can weave in threading, memory and target platform aspects.
   - Has low level (C, LLVM) and high level (CLI, Java, JavaScript) 
backends.

- A **Just-In-Time Compiler generator** able to **automatically**
   enhance the low level versions of our Python interpreter, leading to
   run-time machine code that runs algorithmic examples at speeds typical
   of JITs!

Previous releases, particularly the 0.99.0 release from February,
already highlighted features of our Python implementation and the
abilities of our translation approach but the **new JIT generator**
clearly marks a major research result and gives weight to our vision
that one can generate efficient interpreter implementations, starting
from a description in a high level language.

We have prepared several entry points to help you get started:

* The main entry point for JIT documentation and status:

    http://codespeak.net/pypy/dist/pypy/doc/jit.html

* The main documentation and getting-started PyPy entry point:

    http://codespeak.net/pypy/dist/pypy/doc/index.html

* Our online "play1" demos showcasing various Python interpreters,
   features (and a new way to program AJAX applications):

    http://play1.codespeak.net/

* Our detailed and in-depth Reports about various aspects of the
   project:

    http://codespeak.net/pypy/dist/pypy/doc/index-report.html

In the next few months we are going to discuss the goals and form of
the next stage of development - now more than ever depending on your
feedback and contributions - and we hope you appreciate PyPy 1.0 as an
interesting basis for greater things to come, as much as we do
ourselves!

have fun,

     the PyPy release team,
     Samuele Pedroni, Armin Rigo, Holger Krekel, Michael Hudson,
     Carl Friedrich Bolz, Antonio Cuni, Anders Chrigstroem, Guido Wesdorp
     Maciej Fijalkowski, Alexandre Fayolle

     and many others:
     http://codespeak.net/pypy/dist/pypy/doc/contributor.html


What is PyPy?
================================

Technically, PyPy is both a Python interpreter implementation and an
advanced compiler, or more precisely a framework for implementing dynamic
languages and generating virtual machines for them.

The framework allows for alternative frontends and for alternative
backends, currently C, LLVM and .NET.  For our main target "C", we can
can "mix in" different garbage collectors and threading models,
including micro-threads aka "Stackless".  The inherent complexity that
arises from this ambitious approach is mostly kept away from the Python
interpreter implementation, our main frontend.

PyPy is now also a Just-In-Time compiler generator.  The translation
framework contains the now-integrated JIT generation technology.  This
depends only on a few hints added to the interpreter source and should
be able to cope with the changes to the interpreter and be generally
applicable to other interpreters written using the framework.

Socially, PyPy is a collaborative effort of many individuals working
together in a distributed and sprint-driven way since 2003.  PyPy would
not have gotten as far as it has without the coding, feedback and
general support from numerous people.

Formally, many of the current developers were involved in executing an
EU contract with the goal of exploring and researching new approaches
to language and compiler development and software engineering.  This
contract's duration is about to end this month (March 2007) and we are
working and preparing the according final review which is scheduled
for May 2007.

For the future, we are in the process of setting up structures to help
maintain conceptual integrity of the project and to discuss and deal
with funding opportunities related to further PyPy sprinting and
developments. See here for results of the discussion so far:

     http://codespeak.net/pipermail/pypy-dev/2007q1/003577.html


1.0.0 Feature highlights
==============================


Here is a summary list of key features included in PyPy 1.0:

- The Just-In-Time compiler generator, now capable of generating the
   first JIT compiler versions of our Python interpreter:

    http://codespeak.net/pypy/dist/pypy/doc/jit.html

- More Python interpreter optimizations (a CALL_METHOD bytecode, a method
   cache, rope-based strings), now running benchmarks at around half of
   CPython's speed (without the JIT):

    http://codespeak.net/pypy/dist/pypy/doc/interpreter-optimizations.html

- The Python interpreter can be translated to .NET and enables
   interactions with the CLR libraries:

    http://codespeak.net/pypy/dist/pypy/doc/cli-backend.html
    http://codespeak.net/pypy/dist/pypy/doc/clr-module.html

- Aspect Oriented Programming facilities (based on mutating the Abstract
   Syntax Tree):

    http://codespeak.net/pypy/dist/pypy/doc/aspect_oriented_programming.html
 
http://codespeak.net/pypy/extradoc/eu-report/D10.1_Aspect_Oriented_Programming_in_PyPy-2007-03-22.pdf

- The JavaScript backend has evolved to a point where it can be used to
   write AJAX web applications with it. This is still an experimental
   technique, though. For demo applications which also showcase various
   generated Python and PROLOG interpreters, see:

    http://play1.codespeak.net/

- Proxying object spaces and features of our Python interpreter:

   - Tainting: a 270-line proxy object space tracking and boxing
     sensitive information within an application.

   - Transparent proxies: allow the customization of both application and
     builtin objects from application level code.  Now featuring an
     initial support module (tputil.py) for working with transparent
     proxies.

For a detailed description and discussion of high level backends and
Python interpreter features, please see our extensive "D12" report:

http://codespeak.net/pypy/extradoc/eu-report/D12.1_H-L-Backends_and_Feature_Prototypes-2007-03-22.pdf


Funding partners and organisations
=====================================================

PyPy development and activities happen as an open source project and
with the support of a consortium partially funded by a 28 month
European Union IST research grant for the period from December 2004 to
March 2007. The full partners of that consortium are:

     Heinrich-Heine University (Germany), Open End (Sweden)
     merlinux GmbH (Germany), tismerysoft GmbH (Germany)
     Logilab Paris (France), DFKI GmbH (Germany)
     ChangeMaker (Sweden), Impara (Germany)



From erwan.adam at cea.fr  Fri Mar  9 04:25:08 2007
From: erwan.adam at cea.fr (Erwan Adam)
Date: Fri, 09 Mar 2007 10:25:08 +0100
Subject: Pb with descriptor and super ...
Message-ID: <esr95l$n12$1@ellebore.extra.cea.fr>

Hi all,

I have a problem with the use of descriptors
and super. The file is :

# ---------------

class Desc(object):
     def __init__(self, class_name):
         self.class_name = class_name
         return
     def __get__(self, obj, typ):
         print "Desc.__get__ : class_name is %s, obj is %s and typ is 
%s"%(self.class_name, obj, typ)
         return
     pass

class A(object):
     attr = Desc("A")
     pass

class B(A):
     attr = Desc("B")
     pass

b = B()

print "-------"
print "Getting b.attr ..."
print "I hope that  : class_name is B, obj is b and typ is B"
b.attr
print "-------"
print "Getting super(B, b).attr ..."
print "I hope that  : class_name is A, obj is b and typ is A but it is 
not the case !"
super(B, b).attr
print "-------"

# -----------

and the result is :

-------
Getting b.attr ...
I hope that  : class_name is B, obj is b and typ is B
Desc.__get__ : class_name is B, obj is <__main__.B object at 0xb7b1f8ec> 
and typ is <class '__main__.B'>
-------
Getting super(B, b).attr ...
I hope that  : class_name is A, obj is b and typ is A but it is not the 
case !
Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7b1f8ec> 
and typ is <class '__main__.B'>
-------

I expected that when getting super(B, b).attr, typ is A, but it is not
the case ...

python used :

[adam at is111902 /home/adam/Work/Python]> python
Python 2.4.3 (#2, Sep 18 2006, 21:07:35)
[GCC 4.1.1 20060724 (prerelease) (4.1.1-3mdk)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>>


Best regards,


           E.A.


From gagsl-py2 at yahoo.com.ar  Mon Mar 19 01:46:57 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 02:46:57 -0300
Subject: struct.pack returns nothing
References: <mailman.5269.1174281334.32031.python-list@python.org>
	<1hv6zfk.kpur6sszfqo7N%aleax@mac.com>
	<20070319053901.GB8746@lacordilleraandina.com.ar>
Message-ID: <op.tpe80ja4x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Mon, 19 Mar 2007 02:39:01 -0300, <andmarti at gmail.com> escribi?:

> On Sun, Mar 18, 2007 at 10:22:32PM -0700, Alex Martelli wrote:
>> <andmarti at gmail.com> wrote:
>>
>> > import struct
>> > print struck.pack ('i', 1)
>> >
>> > it returns a '\n'.
>> > What's wrong with it???
>> > :(
>>
>> You're trying to print a binary string that's hardly printable as-is.
>> Try printing its repr(...) and you'll see all the binary zeros and one
>> you crave!-)
>
> Im getting nothing as well.
> The unpack seems to work fine though.

Works fine for me:

py> import struct
py> print repr(struct.pack('i',1))
'\x01\x00\x00\x00'

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 17:11:52 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 19:11:52 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
Message-ID: <op.toual2n7x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 18:48:18 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribi?:

> for f in int, float, complex:
>     try:
>         return f(x)
>     except ValueError:
>         continue
> raise CantDoIt
>
> But if the three things I want to do are not callable objects but
> chunks of code this method is awkward because you have to create
> functions simply in order to be able to loop over them (this is whay I
> was talking about 'abusing loop constructs').  Besides I am not happy
> with the other two idioms I can think of.

Hmmm, functions are cheap - nobody is charging you $2 for each "def"  
statement you write, I presume :)

A bit more serious, if those "chunks of code" are processing its input and  
returning something that you further process... they *are* functions. If  
you don't want them to be publicly available, use inner functions:

def xxxfactory(x):
   def f1(x):
      ...
   def f2(x):
      ...
   def f3(x):
      ...

   for f in f1,f2,f3:
     try:
       return f(x)
   ... same as above...

-- 
Gabriel Genellina



From supervau at gmail.com  Tue Mar 13 00:42:55 2007
From: supervau at gmail.com (Frank)
Date: 12 Mar 2007 21:42:55 -0700
Subject: Calling cpp from python/SWIG
Message-ID: <1173760975.565468.262180@64g2000cwx.googlegroups.com>

Hi,

I have the following problem:

I want to call a cpp program from python. Let's call this cpp program
fct. The problem is that I will parse a large array, say M1, to fct
and also receive a large array, say M2 back (each about 1000 x 1000).

Normally, I would write M1 to a file, call fct via
subprocess.Popen
write M2 in a file within fct, and read M2 with python.

I followed some threads discussing the use of swig in this context.

My questions are:

- is SWIG the best solution for my problem
- are there other ways besides SWIG
- can I find somewhere examples how to do that exactly

Thanks to all!

Frank



From tjreedy at udel.edu  Sat Mar 17 14:40:57 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 Mar 2007 14:40:57 -0400
Subject: Weekly Python Patch/Bug Summary
References: <200703170454.l2H4skKe003172@bayview.thirdcreek.com><20070317075121.565D11E4005@bag.python.org><etg921$9kt$1@sea.gmane.org>
	<20070317102146.4440B1E4010@bag.python.org>
Message-ID: <ethcno$bkk$1@sea.gmane.org>


"Dick Moores" <rdm at rcblue.com> wrote in message 
news:20070317102146.4440B1E4010 at bag.python.org...
| I thought I'd give
| <http://svn.python.org/projects/python/branches/release25-maint/>
| (the latest release (plus bug fixes) of Python) a try. I first backed
| up my Python25 folder (I'm using Win XP). Then with Python 25 open I
| opened the Explorer context menu for the folder and then the
| TortoiseSVN sub-menu. There doesn't seem to have a menu item that
| will enable me to update. I tried Export... and entered
| <http://svn.python.org/projects/python/branches/release25-maint/> as
| "URL of repository", but that choice seems to expect the Python25
| folder to be empty. Can you tell me what to do to just update?

Just to make sure you know, the svn repository is source code that you will 
have to compile.  If TortoiseSVN only copies repositories and reads and 
does not update, then you need svn itself.  But I know almost nothing about 
it except the name.  In any case, to update a local code repository, you 
would need one to begin with by downloading the whole think initially.

tjr





From jstroud at mbi.ucla.edu  Thu Mar  1 16:35:40 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 01 Mar 2007 13:35:40 -0800
Subject: Tkinter menus
In-Reply-To: <es76c6$5bo$1@ss408.t-com.hr>
References: <es76c6$5bo$1@ss408.t-com.hr>
Message-ID: <es7gvd$m3$1@zinnia.noc.ucla.edu>

Gigs_ wrote:
> class MenuDemo(Frame):
>     def __init__(self, parent=None):
>         Frame.__init__(self, parent)
>         self.pack(expand=YES, fill=BOTH)
>         self.createWidgets()
> 
>     def createWidgets(self):
>         self.makeMenuBar()
>         self.makeToolBar()
>         L = Label(self, text='Menu and Toolbar demo')
>         L.config(relief=SUNKEN, width=40, height=10, bg='white')
>         L.pack(expand=YES, fill=BOTH)
> 
>     def makeMenuBar(self):
>         self.menubar = Menu(self.master)        #here
>         self.master.config(menu=self.menubar)   #here
>         self.fileMenu()
>         self.editMenu()
>         self.imageMenu()
> 
> why i need to use self.master?
> why i cant just use self?
> 
> thx

master is a reference to a Tk() or Toplevel(). Frames do not contain 
menus, but the windows that contain them do.

James


From chris9883 at msn.com  Tue Mar  6 06:58:06 2007
From: chris9883 at msn.com (CHRIS CHEW)
Date: Tue, 06 Mar 2007 03:58:06 -0800
Subject: Try to get help on pymat
Message-ID: <BAY104-F12585B557043EE020B0E85AC7B0@phx.gbl>

I am trying to get my pymat to work. The Python script did not interface to 
matlab yet. What are the required script to get the interface to work? 
Please send me email at chris9883 at msn.com

Chris Chew




From mail at microcorp.co.za  Sat Mar 24 04:53:20 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 24 Mar 2007 10:53:20 +0200
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt><1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<pan.2007.03.24.03.22.09.963233@REMOVE.THIS.cybersource.com.au>
Message-ID: <000201c76e9c$c3ae92e0$03000080@hendrik>


 "Steven D'Aprano" <steve at REMOVE.THIS.cyb...urce.com.au> wrote:


> On Fri, 23 Mar 2007 13:15:29 -0700, John Machin wrote:
> 
> > OK, I'll bite: This was "new" in late 2000 when Python 2.0 was
> > released. Where have you been in the last ~6.5 years?
> 
> Western civilization is 6,000 years old. Anything after 1850 is "new".
> 
> *wink*

another nibble:

What happened in 1850 to make it the demarcation line?

I would have thought that the atom bomb round about 1945/6 would
be a crisper marker..

- Hendrik



From MonkeeSage at gmail.com  Wed Mar  7 11:13:47 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Mar 2007 08:13:47 -0800
Subject: finding monitor or screen resolution in Linux with standard
	python module
In-Reply-To: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>
References: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>
Message-ID: <1173284026.938610.75200@j27g2000cwj.googlegroups.com>

On Mar 7, 4:25 am, "akbar" <akbarh... at gmail.com> wrote:
> I googled and searched in archive. All I can find is finding
> resolution with Tkinter and pygame. Any idea to find monitor
> resolution with standard python module?
> I can check from output of: xprop -root
> _NET_DESKTOP_GEOMETRY(CARDINAL) . The problem is when you use Beryl or
> Xgl, it is not correct anymore because Beryl or Xgl set this value
> from amount of workspaces multiplied by monitor or screen resolution.

Perhaps read-edid [1] or ddcprobe [2] would work since they read the
info strait off the EDID. You could probably read the EDID from python
(mabye through the xlib binding?), but no need to reinvent the wheel.

[1] http://john.fremlin.de/programs/linux/read-edid/index.html
[2] http://sources.gentoo.org/viewcvs.py/gentoo-src/Xorgautoconfig/ddcprobe/

Regards,
Jordan



From adam at atlas.st  Mon Mar  5 19:27:46 2007
From: adam at atlas.st (Adam Atlas)
Date: 5 Mar 2007 16:27:46 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
Message-ID: <1173140866.082960.270180@8g2000cwh.googlegroups.com>

Okay, here's the prototype...
<http://adamatlas.org/2007/03/Squisher-0.1.py>
It's meant to be run as a command line program (pass it a directory or
a zip file as an argument). By default it will save the new file to
the argument's base name plus '.pyc'. You can override this with -o.

Obviously it's very much a work in progress... try it out and let me
know the results.



From sickcodemonkey at gmail.com  Thu Mar  8 17:03:36 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Thu, 8 Mar 2007 17:03:36 -0500
Subject: What is the best way to upgrade python?
In-Reply-To: <568e62a40703081355s6038cf08x79dbd934d5ccd1d@mail.gmail.com>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
	<2adc542f0703081331m478b388qe32150541e6b7243@mail.gmail.com>
	<568e62a40703081355s6038cf08x79dbd934d5ccd1d@mail.gmail.com>
Message-ID: <2adc542f0703081403m2481de76nd90263a3ce3f84e9@mail.gmail.com>

Yeah, sorry I should have added more data.
You will need to go to rhn.redhat.com and either download the RPM or get the
url.

So you would do:
(1) download the rpm to your home directory
rpm -Uvh nameOfRPM

or
(2) grab the url
rpm -Uvh http://urlOfRPM

either way should update your python.   Dont be distressed if you need to
update or install new RPMs.

On 3/8/07, ying lcs <yinglcs at gmail.com> wrote:
>
> On 3/8/07, Sick Monkey <sickcodemonkey at gmail.com> wrote:
> > Have you tried to upgrade the current python RPM?
> >
> > rpm -Uvh ....
> >
> > You can also build from source.  Once you get Python 2.4 up and running
> I am
> > pretty sure you can do a symbolic link on the python 2.3 application
> (either
> > in /usr/bin or /usr/sbin) and point it to the 2.4 python file.
> >
>
>
> I get '$rpm -Uvh python'
> error: open of python failed: no such file or directory
>
> but when I do '$rpm -q python ' , I get python -2.3.4-14.1
>
>
>
> > On 8 Mar 2007 13:13:13 -0800, yinglcs at gmail.com <yinglcs at gmail.com >
> wrote:
> > > Hi,
> > >
> > > i am using red hat enterprise 4. It has python 2.3 installed. What is
> > > the best way to upgrade to python 2.4?
> > >
> > > I think one way is to compile python 2.4 from the source, but I can't
> > > remove the old one since when i do 'rpm -e python', i get error like
> > > 'failed dependencies'.
> > >
> > > Thank you for any idea.
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
>
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From ceball at gmail.com  Sun Mar 25 08:10:49 2007
From: ceball at gmail.com (Chris)
Date: 25 Mar 2007 05:10:49 -0700
Subject: Tkinter Toplevel geometry
In-Reply-To: <hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
	<0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>
	<hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>
Message-ID: <1174824649.683426.78990@d57g2000hsg.googlegroups.com>


> After playing with this an inordinate amount of time, I found that one
> does need to supply parameters, namely the null parameter of an empty
> string. Try:
>
>    sometop.geometry('')
>
> This repacks according to the widgets. Not quite clear from the
> miserable docs, is it?


Wow, that does work. Thank you very much for figuring it out!



From carsten at uniqsys.com  Fri Mar  9 15:43:53 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 09 Mar 2007 15:43:53 -0500
Subject: is this a bug? (python 2.3)
In-Reply-To: <1173472337.094165.65510@8g2000cwh.googlegroups.com>
References: <1173472337.094165.65510@8g2000cwh.googlegroups.com>
Message-ID: <1173473033.3450.81.camel@dot.uniqsys.com>

On Fri, 2007-03-09 at 12:32 -0800, Sean McIlroy wrote:
> hi all
> 
> when i run this code in python 2.3
> 
> ######################  BEGIN CODE
> class warfare:
>     def __init__(self): self.pairs = [[0,0]]*2
>     def __str__(self): return str(self.pairs)
>     def setfirst (self,i,value): self.pairs[i][0] = value
>     def setsecond(self,i,value): self.pairs[i][1] = value
> 
> w = warfare()
> print w
> w.setfirst(0,'hello')
> print w
> ######################  END CODE
> 
> i get this result
> 
> ######################  BEGIN ACTUAL RESULT
> [[0, 0], [0, 0]]
> [['hello', 0], ['hello', 0]]
> ######################  END ACTUAL RESULT
> 
> instead of the expected result
> 
> ######################  BEGIN EXPECTED RESULT
> [[0, 0], [0, 0]]
> [['hello', 0], [0, 0]]
> ######################  END EXPECTED RESULT

http://www.python.org/doc/faq/programming/#how-do-i-create-a-multidimensional-list

-Carsten




From irstas at gmail.com  Sun Mar 25 04:36:12 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 25 Mar 2007 01:36:12 -0700
Subject: Idiom for running compiled python scripts?
In-Reply-To: <pan.2007.03.24.23.46.15@mailinator.com>
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.23.46.15@mailinator.com>
Message-ID: <1174811772.427983.114660@l75g2000hse.googlegroups.com>

On Mar 25, 2:46 am, Mark <m... at mailinator.com> wrote:
> On Sat, 24 Mar 2007 07:21:21 -0700, irstas wrote:
> > A simple implementation that "works":
>
> Not quite irstas BTW ..

I was expecting this, hence the quotes around 'works' :P.
Another known issue is that globals() dictionary is somewhat
different when ran with my module. You should probably
look into the runpy's source code for better environment
compability (Python25/Lib/runpy.py). Although no quarantees
that it'd help.

> Something about the environment is not quite the same. Any ideas?

What Gabriel said may be the correct fix (I actually couldn't
reproduce the
bug so I couldn't test), but here's another idea: You could wrap
your main method in a try-finally block:

def main():
    try:
        do things
    finally:
        remove temp files

The finally-block will be executed even if you call sys.exit
inside the try-block. This change will also make it possible
to invoke your script many times, with temp files getting deleted
after each invocation, should this ever be useful to you.
(well, not if you use sys.exit :P)



From sjmachin at lexicon.net  Sat Mar 10 12:14:16 2007
From: sjmachin at lexicon.net (John Machin)
Date: 10 Mar 2007 09:14:16 -0800
Subject: making an "executable" for a python code (newbie)
In-Reply-To: <mailman.4903.1173538917.32031.python-list@python.org>
References: <mailman.4903.1173538917.32031.python-list@python.org>
Message-ID: <1173546856.339326.121260@q40g2000cwq.googlegroups.com>

On Mar 11, 1:54 am, "Pradnyesh Sawant" <spra... at gmail.com> wrote:
> hello,
> i have some python scripts (especially, PyQt4 scripts) that i want to
> deploy on both linux and windows m/c's. different packaging tools that
> i checked (cx_freeze, distutils, pyinstaller) allow me to create
> "installers". however, i'm interested in creating "executables" that
> allow the code to be run just on "double clicking". is there any way
> to get this done?
> also, it seems that "pyexe" creates a windows executable, but how do i
> use it on linux?
>
> thanks for all the help!

pyinstaller: The very first sentence on its website is "PyInstaller is
a program that converts (packages) Python programs into stand-alone
executables, under Windows, Linux and Irix."

ditto(gadget="cx_Freeze", blurb="cx_Freeze is a set of utilities for
freezing Python scripts into executables ...") and there are later
mentions of Linux and various other .*[xX] platforms.

It would be helpful for future inquirers if you were to say why these
two packages seem to meet your need but after checking, you have found
that they don't.

Cheers,
John



From piet at cs.uu.nl  Mon Mar  5 04:51:32 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Mon, 05 Mar 2007 10:51:32 +0100
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
Message-ID: <m2lkic2f2z.fsf@cochabamba.cs.uu.nl>

>>>>> "Bart Ogryczak" <B.Ogryczak at gmail.com> (BO) wrote:

>BO> Any system with 8-bit bytes, which would mean any system made after
>BO> 1965. I'm not aware of any Python implementation for UNIVAC, so I
>BO> wouldn't worry ;-)

1965? I worked with non-8-byte machines (CDC) until the beginning of the
80's. :=( In fact in that time the institution where Guido worked also had such
a machine, but Python came later.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From rorymckinleylists at gmail.com  Thu Mar  1 16:09:56 2007
From: rorymckinleylists at gmail.com (Rory McKinley)
Date: Thu, 01 Mar 2007 23:09:56 +0200
Subject: MySQLdb - N00b Question
Message-ID: <45E74124.1050402@gmail.com>

Hello List

Apologies if this is documented somewhere already, but Google is turning
up nothing useful. Does anybody know if it is possible to set up an SSL
connection to a remote MySQL database using MySQLdb?

Thanks

Rory


From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 14 16:59:17 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 21:59:17 +0100
Subject: Beginner question: difference between lists and tuples
In-Reply-To: <1173901598.431739.164380@o5g2000hsb.googlegroups.com>
References: <1173901598.431739.164380@o5g2000hsb.googlegroups.com>
Message-ID: <45f859e5$0$1378$426a74cc@news.free.fr>

KDawg44 a ?crit :
> Hi,
> 
> I am trying to learn python.  I am working through a tutorial on
> python.org.  I am trying to figure out how lists are different than
> tuples other than changing values at specific indices.

http://www.python.org/doc/faq/general/#why-are-there-separate-tuple-and-list-data-types


From nulla.epistola at web.de  Sun Mar 25 15:55:30 2007
From: nulla.epistola at web.de (Hertha Steck)
Date: Sun, 25 Mar 2007 21:55:30 +0200
Subject: problem at installing phyton on windows
In-Reply-To: <1174848014.932107.206320@e65g2000hsc.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
Message-ID: <eu6k3n$uk6$03$1@news.t-online.com>

gslm schrieb:
> First, thaks a lot.
> But I'm sorry.I haven't understood what i must do for ruunnig phyton
> command.I delete path from proportiesof my computer.Then i open
> command line of phyton.But when i write phyton these view below:
> Traceback<most recent call last>:
> File "<stdin>"; line 1 in <module>
> NameError: name phyton is not defined

Such an answer comes from Python, I think you must already be in the 
interactive interpreter. Do you see something similar to this, with your 
cursor after the ">>>"?

Python 2.5 (r25:51908, Oct  6 2006, 15:22:41)
[GCC 4.1.2 20060928 (prerelease) (Ubuntu 4.1.1-13ubuntu4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>>

At this point you can enter valid Python statements, but you can't call 
Python from Python (wouldn't make sense anyway).

I'd look at this page first:

http://www.python.org/about/gettingstarted/

HTH
Hertha


From lovelydiab at hotmail.com  Wed Mar 14 01:09:28 2007
From: lovelydiab at hotmail.com (moslim)
Date: 13 Mar 2007 22:09:28 -0700
Subject: Twelve Proofs that Muhammad is a True Prophet
Message-ID: <1173848968.285569.196780@d57g2000hsg.googlegroups.com>

My brothers and sisters everywhere! With this essay, I am not singling
out the adherents of Islam - to which I ascribe - but rather I am
writing this essay to every man and woman throughout the whole world.

I ask Allah that He facilitates tat this essay reaches every ear,
falls under the sight of every eye, and is understood by every
heart...

Muhammad the son of `Abdullah is Allah's Prophet and the Final
Messenger Sent by Allah to the Inhabitants of Earth.

My brothers and sisters everywhere! You should know that the
Messenger, Muhammad the son of `Abdullah (may Allah's blessings and
peace be upon him) is Allah's Messenger in reality and truth. The
evidences that show his veracity are abundant. None but an infidel,
who out of arrogance alone, could deny these signs.

Among these proofs:

1. Muhammad (may Allah's blessings and peace be upon him) was raised
illiterate, unable to read or write, and remained like that till his
death. Among all his people, he was known as being truthful and
trustworthy. Before receiving revelation, he had no prior knowledge of
Religion or any previously sent Message. He remained like that for his
first forty years. Revelation then came to Muhammad with the Koran
that we now have between our hands. This Koran mentioned most of the
accounts found in the previous scriptures, telling us about these
events in the greatest detail as if he witnessed them. These accounts
came precisely as they were found in the Torah sent down to Moses and
in the Gospel sent down to Jesus. Neither the Jews or Christians were
able to belie him regarding anything that he said.

2. Muhammad (may Allah's blessings and peace be upon him) also
foretold of everything that would occur to him and his community after
him, pertaining to victory, the removal of the tyrannical kingdoms of
Chosroes [the royal title for the Zoroastrian kings of Persia] and
Caesar, and the establishment of the religion of Islam throughout the
earth. These events occurred exactly as Muhammad foretold, as if he
was reading the future from an open book.

3. Muhammad (may Allah's blessings and peace be upon him) also brought
an Arabic Koran that is the peak of eloquence and clarity. The Koran
challenged those eloquent and fluent Arabs of his time, who initially
belied him, to bring forth a single chapter like the Koran. The
eloquent Arabs of his day were unable to contest this Koran.

Indeed, till our day, none has ever dared to claim that he has been
able to compose words that equal-or even approach-the order, grace,
beauty, and splendor of this Glorious Koran.

4. The life history of this Noble Prophet was a perfect example of
being upright, merciful, compassionate, truthful, brave, generous,
distant from all evil character, and ascetic in all worldly matters,
while striving solely for the reward of the Hereafter. Moreover, in
all his actions and dealings, he was ever mindful and fearful of
Allah.

5. Allah instilled great love for Muhammad (may Allah's blessings and
peace be upon him) in the hearts of all who believed in and met him.
This love reached such a degree that any of his companions would
willingly sacrifice his (or her) self, mother or father for him.

Till today, those who believe in Muhammad honor and love him. Anyone
of those who believe in him would ransom his own family and wealth to
see him, even if but once.

6. All of history has not preserved the biography of any person in the
manner it has preserved the life of Muhammad, who is the most
influential human in history.

Nor has the entire earth known of anyone whom every morning and
evening, and many times thereafter throughout the day, is thought of
by those who believe in him. Upon remembering Muhammad, the believers
in him will greet him and ask Allah to bless him. They do such with
full hearts and true love for him.

7. Nor has there every been a man on earth whom is still followed in
all his doings by those who believe in him.

Those who believe in Muhammad, sleep in the manner he slept; purify
themselves (through ablution and ritual washing) in the manner he
purified himself; and adhere to his practice in the way they eat,
drink, and clothe themselves.

Indeed in all aspects of their lives, the believers in Muhammad adhere
to the teachings he spread among them and the path that he traveled
upon during his life.

During every generation, from his day till our time, the believers in
this Noble Prophet have fully adhered to his teachings. With some,
this has reached the degree that they desire to follow and adhere to
the Prophet's way in his personal matters regarding which Allah has
not sought of them to adhere to in worship. For example, some will
only eat those specific foods or only wear those specific garments
that the Messenger liked.

Let alone all that, all those who believe in Muhammad repeat those
praises of Allah, special prayers, and invocations that he would say
during each of his actions during day and night, like: what he would
say when he greeted people, upon entering and leaving the house,
entering and leaving the mosque, entering and leaving the bathroom,
going to sleep and awaking from sleep, observing the new crescent,
observing the new fruit on trees, eating, drinking, dressing, riding,
traveling and returning from travel, etc.

Let alone all that, all those who believe in Muhammad fully perform-
even to the minute detail-every act of worship-like prayer, fasting,
charity, and pilgrimage-as this Noble Messenger (may Allah's blessings
and peace be upon him) taught and as he himself performed.

All of this allows those who believe in him, to live their lives in
all aspects with this Noble Messenger as their example, as if he was
standing before them, for them to follow in all their doings.

8. There has never been nor will there ever be a man anywhere upon
this earth who has received such love, respect, honor, and obedience
in all matters-small and large alike-as has this Noble Prophet.

9. Since his day, in every region of the earth and during every
period, this Noble Prophet has been followed by individuals from all
races, colors and peoples. Many of those who followed him were
previously Christians, Jews, pagans, idolaters, or without any
religion. Among those who chose to follow him, were those who were
known for their sound judgment, wisdom, reflection, and foresight.
They chose to follow this Noble Prophet after they witnessed the signs
of his truthfulness and the evidences of his miracles. They did not
choose to follow Muhammad out of compulsion or coercion or because
they had adopted the ways of their fathers and mothers.

Indeed many of the followers of this Prophet (may Allah's blessings
peace be upon him), chose to follow him during the time when Islam was
weak, when there were few Muslims, and when there was severe
persecution of his followers on earth. Most people who have followed
this Prophet (may Allah's blessings and peace be upon him) have done
so not to acquire some material benefits. Indeed many of his followers
have suffered the greatest forms of harm and persecution as a result
of following this Prophet. Despite all this harm and persecution, this
did not turn them back from his religion.

My brethren! All of this clearly indicates to anyone possessing any
sense, that this Prophet was truly and really Allah's messenger and
that he was not just a man who claimed prophethood or spoke about
Allah without knowledge.

10. With all this, Muhammad came with a great religion in its credal
and legal make-up.

Muhammad described Allah with qualities of complete perfection, and at
the same time in a manner that is free of ascribing to Him any
imperfection. Neither the philosophers or the wise could ever describe
Allah like such. Indeed it is impossible to imagine that any human
mind could conceive of an existing being that possesses such complete
ability, knowledge, and greatness; Who has subdued the creation; Who
has encompassed everything in the universe, small or large; and Who
possesses such perfect mercy.

Nor is it in the ability of any human being to place a perfect law
based upon justice, equality, mercy and objectivity for all human
activity on earth like the laws that Muhammad brought for all spheres
of human activity - like buying and selling, marriage and divorce,
renting, testimony, custody, and all other contracts that are
necessary to uphold life and civilization on earth.

11. It is impossible that any person conceive wisdom,, morals, good
manners, nobleness of characters as what this honorable Prophet (may
Allah's blessings and peace be upon him) brought.

In a full and complete manner, Muhammad spread a teaching regarding
character and manners toward one' parents, relatives, fiends, family,
humanity, animals, plants and inanimate objects. It is impossible for
the human mind alone to grasp all of that teaching or come with a
similar teaching.

All of that unequivocally indicates that this Messenger did not bring
an) of this religion from his own accord, but that it was rather a
teaching and inspiration that he received from the One Who created the
earth and the high heavens above and created this universe in its
miraculous architecture and perfection.

12. The legal and credal make-up of the religion that the Messenger,
Muhammad, (may Allah's blessings and peace be upon him) brought
resembles the engineering of the heavens and the earth. All of that
indicates that He who created the heavens and the earth is the One Who
sent down this great law and upright religion.

The degree of inimitability of the Divine law that was sent down upon
Muhammad is to the same degree of inimitability of the Divine creation
of the heavens and earth. For just as humanity cannot create this
universe, in the same manner humanity cannot bring forth a law like
Allah's law that He sent down upon His servant and messenger Muhammad
(may Allah's blessings and peace be upon him).



From google at mrabarnett.plus.com  Sat Mar  3 18:04:32 2007
From: google at mrabarnett.plus.com (MRAB)
Date: 3 Mar 2007 15:04:32 -0800
Subject: cyclic iterators ?
In-Reply-To: <7xejo79kvy.fsf@ruckus.brouhaha.com>
References: <1172884260.852007.122260@64g2000cwx.googlegroups.com>
	<7xejo79kvy.fsf@ruckus.brouhaha.com>
Message-ID: <1172963071.868403.194080@8g2000cwh.googlegroups.com>

On Mar 3, 1:27 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Tool69" <kibleur.christo... at gmail.com> writes:
> > I've tried something like this to have a cyclic iterator without
> > sucess:
>
> > def iterate_mylist(my_list):
> >     k = len((my_list)
> >     i=0
> >     while i <= k :
> >         yield my_list[i]
> >         i += 1
> >     i = 0
> >     yield my_list[0]
>
> > I missed something, but I don't know what exactly.
>
> As Bruno says, you can use itertools.cycle, but the problem above is
> that you're not looping repeatedly through the list; you yield all the
> elements, then yield the first element again, then stop.  So for
> ['a','b','c']  you'd yield the sequence a,b,c,a.
>
> I'd rewrite the above something like:
>
>   def iterate_mylist(my_list):
>      while True:
>        for m in my_list:
>           yield m
>
> This just loops through the list over and over again.
>
Another problem is that it should be i < k, not i <= k.



From joshua at eeinternet.com  Wed Mar  7 16:04:19 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 07 Mar 2007 12:04:19 -0900
Subject: Why does SocketServer default allow_reuse_address = false?
References: <45e3668e$0$16385$88260bb3@free.teranews.com>
	<1173278345.027948.94700@j27g2000cwj.googlegroups.com>
	<45ef0d8e$0$16290$88260bb3@free.teranews.com>
	<mailman.4765.1173298247.32031.python-list@python.org>
Message-ID: <45ef1c4c$0$16288$88260bb3@free.teranews.com>

Chris Mellon wrote:
>> My problem (and the reason I set reuse to True) is this: if I have
>> connections active when I restart my service, upon restart, the socket
>> will
>> fail to bind because there is still a connection in a WAIT state.
> 
> This is just the way sockets work on your platform. How exactly
> sockets shut down, and the exact effect that SO_REUSEADDR varies from
> platform to platform. In your case, using it is probably reasonable.

Thank you.  Glad to know I've chosen the best solution for my situation.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From steve at holdenweb.com  Thu Mar 22 09:22:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 09:22:57 -0400
Subject: Removing a particular index from a list
In-Reply-To: <ettveb$vti$01$1@news.t-online.com>
References: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
	<ettveb$vti$01$1@news.t-online.com>
Message-ID: <etu023$1ql$1@sea.gmane.org>

Peter Otten wrote:
> Srikanth wrote:
> 
>> list.remove(item) removes the first item from the list, but how do I
>> say to remove a particular index from a list without using it's value?
>>
>> Let's say I have 4 items in my list as
>>
>>>>> li = ["sri", "s", "srikanth", "s"]
>> And if I want to remove the last item ("s"), how do I remove it?
>> li.remove(-1) doesn't do it. 
> 
> del li[-1]
> 
>> This is my problem. 
> 
> This, or not reading the tutorial.
> 
No, that's OUR problem :-)
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From cfbolz at gmx.de  Thu Mar 29 13:10:31 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Thu, 29 Mar 2007 19:10:31 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <Xns9902840109A04duncanbooth@127.0.0.1>
References: <D78AD813-12F4-49D2-81B3-157681FEC6A4@stackless.com>	<mailman.5747.1175163481.32031.python-list@python.org>
	<Xns9902840109A04duncanbooth@127.0.0.1>
Message-ID: <460BF307.7010104@gmx.de>

Duncan Booth wrote:
> Robin Becker <robin at reportlab.com> wrote:
> 
>> I am hugely encouraged by this
>>
>> C:\Python\devel\pypy-1.0.0>\python24\python \python\lib\test
> \pystone.py
>> Pystone(1.1) time for 50000 passes = 1.49586
>> This machine benchmarks at 33425.6 pystones/second
>>
>> C:\Python\devel\pypy-1.0.0>.\pypy-c.exe \python\lib\test\pystone.py
>> Pystone(1.1) time for 50000 passes = 2.16123e-005
>> This machine benchmarks at 2.3135e+009 pystones/second
>>
>>
>> :) not
> 
> It looks like time.clock() is completely borked.

time.clock was indeed borked under windows (of by a factor of 1000). 
fixed in svn now.

Cheers,

Carl Friedrich


From istvan.albert at gmail.com  Tue Mar  6 15:20:52 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 6 Mar 2007 12:20:52 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173212319.214424.320090@64g2000cwx.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
	<1173212319.214424.320090@64g2000cwx.googlegroups.com>
Message-ID: <1173212452.810851.89210@j27g2000cwj.googlegroups.com>

On Mar 6, 3:18 pm, "Istvan Albert" <istvan.alb... at gmail.com> wrote:

> try the networkx package, it includes the pygraphviz module that can
> generate dot files:
>
> https://networkx.lanl.gov/wiki

should've checked it before posting, it seems nowadays is actually a
separate package

https://networkx.lanl.gov/wiki/pygraphviz



From cjlesh at gmail.com  Wed Mar 21 13:43:50 2007
From: cjlesh at gmail.com (cjl)
Date: 21 Mar 2007 10:43:50 -0700
Subject: parsing tables with beautiful soup?
Message-ID: <1174499030.042369.312350@n76g2000hsh.googlegroups.com>

I am learning python and beautiful soup, and I'm stuck.

A web page has a table that contains data I would like to scrape. The
table has a unique class, so I can use:

soup.find("table", {"class": "class_name"})

This isolates the table. So far, so good. Next, this table has a
certain number of rows (I won't know ahead of time how many), and each
row has a set number of cells (which will be constant).

I couldn't find example code on how to loop through the contents of
the rows and cells of a table using beautiful soup. I'm guessing I
need an outer loop for the rows and an inner loop for the cells, but I
don't know how to iterate over the tags that I want.  The beautiful
soup documentation is a little beyond me at this point.

Can anyone point me in the right direction?

thanks again,
cjl



From "greenbergj\" at  NOSPAM wit.edu  Tue Mar 13 00:57:01 2007
From: "greenbergj\" at  NOSPAM wit.edu (Jordan Greenberg)
Date: Tue, 13 Mar 2007 00:57:01 -0400
Subject: Starting Python... some questions
In-Reply-To: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
Message-ID: <et5aub$901$1@registered.motzarella.org>

jezonthenet at yahoo.com wrote:
> I started using Python a couple of days ago - here are a few
> questions:
> 
> * Doesn't the __main__() method automatically execute when I run my
> python program?
> * Only when I do an import of my test.py file within python and then
> run test.__main__() I can see where my bugs are. Is this correct?
> (right now this is my only way of running my python program and see
> where I have problems)

No, there is no special __main__ function, to the best of my knowledge. 
I think the idiom you're thinking of is:

if __name__="__main__":
	#Your main stuff here

But that won't execute if you do an import. Only when you call the 
script directly, like:

python myscript.py

for example.

> * Once I've done an import and then I wish to make a change to the
> file I've imported I have to quit Python, restart and import that
> module again in order for the module to be refreshed. Is there no "re-
> import" ?

There is. The reload command. Usage is similar to import:

import MyModule
#Do your edit, and reload thusly:
reload MyModule

> * Finally, could someone tell me why I'm having problems with the
> small module below?
>   - Python pretends I provide chassis_id() with three parameters, even
> though I clearly only provide it with two - why?
Python expects self as the first parameter. You might want to take 
another look at the class bits of your tutorial of choice, or:
http://docs.python.org/tut/node11.html

The function definition should look more like:

def chassis_id(self, subtype, chassis_info):

HTH.
-Jordan Greenberg


From deets at nospam.web.de  Fri Mar  9 11:14:33 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 17:14:33 +0100
Subject: about application deployment
References: <mailman.4860.1173456688.32031.python-list@python.org>
Message-ID: <55dffaF24658vU2@mid.uni-berlin.de>

Alessandro de Manzano wrote:

> Hello,
> 
> I'ld ask you all about deployment of python applications.
> 
> Sometimes (if not most times..) I would make deployment easy (easier)
> for my customers (and for me too...)
> 
> What I mean, would be very useful to have a "jar-like" archive/single
> file / multiple platform in order to deploy also complex applications
> with many modules.
> 
> I know about "py2exe", it's nice but it's Windows only, I would need
> something multiplatform or at least available also for other platforms
> (*nix, Mac maybe, ...)
> 
> My impression is that Python is a great language but a bit "messy"
> about on field deployment...
> 
> What am I missing ? :)
> What are your experiences (and solutions ?) for this issues ?

There are the greate setuptools available, that make creating and installing
a single .egg-file (which is very close to a jar) easy as cake - provided
you've got them working.

I'm not sure if there is some equivalent as 

java -jar <jar>

though. Could be worth thinking about.

Diez


From socialanxiety at gmail.com  Mon Mar  5 04:07:35 2007
From: socialanxiety at gmail.com (socialanxiety at gmail.com)
Date: 5 Mar 2007 01:07:35 -0800
Subject: clientcookie/clientform and checking to see if a website accepted my
	login details
Message-ID: <1173085655.703034.10390@v33g2000cwv.googlegroups.com>

alright, i'm coding a program that will log me into yahoo.com (so
far), now, the problem i have is that once i've submitted by login &
password, the program doesn't know whether yahoo.com accepted it.
"
response = ClientCookie.urlopen(form.click())
"

now, when i get an error, the contents of 'response' will be
different, ex: the contents of  '<title>example</title>' will be
'<title>logged in!</title>'. is there any function that can search
through the code for that text to check if i'm logged in or not?

all help is appreciated



From paul at boddie.org.uk  Fri Mar 30 18:59:00 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 30 Mar 2007 15:59:00 -0700
Subject: Cheeseshop needs mirrors
In-Reply-To: <460d874b$0$5746$afc38c87@news.optusnet.com.au>
References: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>
	<1175249588.897793.24450@o5g2000hsb.googlegroups.com>
	<460d874b$0$5746$afc38c87@news.optusnet.com.au>
Message-ID: <1175295540.423095.34560@r56g2000hsd.googlegroups.com>

Richard Jones wrote:
>
> And of course I'll reiterate the same line I always do: the Cheese Shop was
> set up by a volunteer, enhanced by some other volunteers and exactly
> nothing more will get done unless more volunteers offer their time.

Sure. I wasn't criticising the Cheese Shop, though: it's a great
service that I make a lot of use of, and while the Vaults of Parnassus
were useful in their day, nothing matches the official package index
either in terms of usability or as a showcase for Python's relevance
in the real world.

However, if people are starting to use it as some kind of auto-
download site where potentially thousands of users acquire a release
of, say, Pylons or TurboGears and then aim their tools and start
downloading many different packages, all without being aware of the
other side of the transaction, then I think the developers of those
tools (as opposed to you and the other infrastructure volunteers) need
to step up and responsibly consider the effects that those tools have.
Some of that consideration might include evaluating how other
mechanisms for package distribution manage to work with huge numbers
of users, rather than having the package index serve up potentially
expensive pages just so that those tools can keep doing the easy
thing, for example.

Paul

P.S. I'll even volunteer to help out if that's what's needed, although
I feel fairly thinly spread already.



From aboudouvas at panafonet.gr  Sun Mar  4 19:42:07 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 4 Mar 2007 16:42:07 -0800
Subject: wxPython import error...
Message-ID: <1173055327.592532.256350@p10g2000cwp.googlegroups.com>

Hi,

i am just completed installing Python/Pydev/Eclipse/wxPython on an
Ubuntu system and all are running fine except program that contains
references to wx

It gives me:
ImportError: /usr/lib/python2.4/site-packages/wx-2.8-gtk2-unicode/wx/
_core_.so: undefined symbol: PyUnicodeUCS4_FromEncodedObject

I installed the wx packages the way the wx web site says, especially
for Ubuntu.

Can anyone help with this as i have been searching the net for this
with no luck...

Thanks for any help



From kirby.urner at gmail.com  Sat Mar 10 15:51:41 2007
From: kirby.urner at gmail.com (kirby urner)
Date: Sat, 10 Mar 2007 12:51:41 -0800
Subject: [Edu-sig] minimum age to learn python (a.k.a graphical vs text
	languages)
In-Reply-To: <45F31889.6040201@gmx.de>
References: <45F2CFC4.5010801@bryant.edu>
	<f604188c0703100837r1762e63clda21fd199d3fe1f4@mail.gmail.com>
	<45F31889.6040201@gmx.de>
Message-ID: <f604188c0703101251w37404c0du705571b3387f8c67@mail.gmail.com>

On 3/10/07, Andreas Raab <andreas.raab at gmx.de> wrote:
> kirby urner wrote:
> > I just talked to the computer teacher yesterday and he
> > was reporting some rumor that future versions of Alice will
> > center around the same Sims as in Sims, which my daughter
> > plays with *a lot* (we also bought Civ City Rome yesterday,
> > coincidentally, and she built Rome in a day).
>
> More than rumor apparently:
>
>   http://www.cmu.edu/cmnews/extra/060310_alice.html
>
> Cheers,
>   - Andreas

Hey thanks!  Fowarding to my daughter FYI.

Kirby


From ptmcg at austin.rr.com  Sun Mar  4 21:27:49 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 4 Mar 2007 18:27:49 -0800
Subject: How use XML parsing tools on this one specific URL?
In-Reply-To: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <1173061669.160888.144650@v33g2000cwv.googlegroups.com>

P.S. Please send me 1% of all the money you make from your automated-
stock speculation program.  On the other hand, if you lose money with
your program, don't bother sending me a bill.

-- Paul



From vatamane at gmail.com  Mon Mar 12 01:01:25 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 11 Mar 2007 22:01:25 -0700
Subject: Bitpacked Data
In-Reply-To: <45f47994$0$37205$4fafbaef@reader3.news.tin.it>
References: <45f47994$0$37205$4fafbaef@reader3.news.tin.it>
Message-ID: <1173675685.382401.216890@8g2000cwh.googlegroups.com>

On Mar 11, 5:49 pm, none <""luca\"@(none)"> wrote:
> i need to interface python with a bitpacked data file,
> the structure recorded in the file is the following:
>
> struct {
> var_1 4bit
> var_2 6bit
> var_3 2bit
> var_3 4bit
>
> }
>
> how can read the struct and convert data into dictionary
>
> Thnx

I noticed that you have a 4+6+2+4=16 bits total. That's a short
(unsigned) integer that you'd have to unpack using the stuct module's
unpack method.

The format string would be 'H'. Unpack using big endian. Here is a
quick example for you:
------------------------------
vatamane at nthink:~$ ipython
>>> from struct import pack,unpack
>>> m1='1'*4
>>> m2='1'*6
>>> m3='1'*2
>>> m4='1'*4
>>> m1,m2,m3,m4
('1111', '111111', '11', '1111')
>>> #define some data
>>> idata=int('1100101011111110',2)
>>> idata
51966
>>> #pack as a 16 bit integer (usigned int)
>>> packed=pack('>H',idata)
>>> #note > means big endian
>>> packed
'\xca\xfe'
>>> #oh, wow it spells cafe! ;-)
>>> #now unpack
>>> unpacked=unpack('>H',packed)
>>> unpacked
(51966,)
>>> odata=unpacked[0]
>>> vars=[]
>>> for mask in (m4,m3,m2,m1):
   ....:     vars.append(odata & int(mask,2) )
   ....:     odata>>=len(mask)
   ....:
>>> vars
[14, 3, 43, 12]
>>> vars.reverse()
>>> vars
[12, 43, 3, 14]

-------------------------------------------------
So in binary v1='1100' v2='101011' v3='11' v4='1110'
If you concatenate them: 1100101011111110 you get the original
idata...

Hope this helped,
Nick Vatamaniuc






From bensherman at gmail.com  Mon Mar 19 10:41:59 2007
From: bensherman at gmail.com (Ben)
Date: 19 Mar 2007 07:41:59 -0700
Subject: When is List Comprehension inappropriate?
Message-ID: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>

I have recently learned how list comprehension works and am finding it
extremely cool.  I am worried, however, that I may be stuffing it into
places that it does not belong.

What's the most "pythony" way to do this:

even = []
for x in range(0,width,2):
    for y in range(0,height,2):
        color = im.getpixel((x,y))
        even.append(((x,y), color))

versus list comprehension:

even2 = [((x,y), im.getpixel((x,y))) for x in range(0,width,2) for y
in range(0,height,2)]

Is there a computational difference in creating a blank list and
appending to it versus doing a list comprehension?   Are there
advantages to it outside of short and pretty code?

Feel free to tell me a different way to do this, as well.

Thanks,
Ben



From DustanGroups at gmail.com  Sat Mar 24 08:39:11 2007
From: DustanGroups at gmail.com (Dustan)
Date: 24 Mar 2007 05:39:11 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <1174737587.638835.137070@y80g2000hsf.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
Message-ID: <1174739951.358958.245240@o5g2000hsb.googlegroups.com>

On Mar 24, 5:59 am, "Dustan" <DustanGro... at gmail.com> wrote:
> On Mar 23, 1:30 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>
> > Mike Kent escreveu:
> > ...
>
> > > New way:
> > > l=['a','b','c']
> > > jl=','.join(l)
>
> > I thank you all.
>
> > Almost there ...
> > I tried "".join(l,',') but no success ... :-(
>
> > Paulo
>
> Perhaps you're doing it wrong, despite having an example right in
> front of you?
>
> Side by side comparison:
> jl=string.join(l,',')
> jl=','.join(l)
>
> The sequence is passed as an argument to the join method, and the
> delimiter is the string whose method is being called.

To further demonstrate (because I got a weird email that seemed to
think that my code didn't work):

>>> import string
>>> l = ['a','b','c']
>>> string.join(l,',')
'a,b,c'
>>> ','.join(l)
'a,b,c'



From joshua at eeinternet.com  Wed Mar 28 16:41:06 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 28 Mar 2007 12:41:06 -0800
Subject: Finding a module's sub modules at runtime
References: <460ab913$0$16387$88260bb3@free.teranews.com>
	<1175112265.427331.93340@o5g2000hsb.googlegroups.com>
Message-ID: <460ac66a$0$16290$88260bb3@free.teranews.com>

On Wednesday 28 March 2007 12:04, kyosohma at gmail.com wrote:
>> All works fine.  However, when I import ModTest, I would like it to
>> discover and store the names of the modules beneath it, and construct a
>> list, say mod_list, that I can access later to find the names of the
>> sub-modules in
>> this module.  Kind of setting __all__ at run time, I guess (yes, I'm
>> aware of the case caveats).
>>
>> I figured __init__.py coudl take its own __path__ and walk the directory
>> to
>> find all .py files other than __init__.py, but that seemed hackish.  Is
>> there an "official" way to do this?  Or a better way?
>>
>> To give "context:" all the modules will have classes that have the same
>> name, same methods etc.  One of the modules will be picked depending on
>> which implementation is needed.
> 
> I think you need to research how to create documentation. When I
> import a module/package, I can then type help(moduleName) and it'll
> give me the module or package's contents.
> 
> http://mail.python.org/pipermail/python-list/2003-February/192069.html
> 
> You may be able to figure out how to do this just be studying the
> "help" module itself.
> 
> Mike

Well, it seems the "help" module is a built in, and has no .py file
anywhere.  The epydoc package uses the imports.file_modules(dirname)
function, which just walks the directory tree.  Thanks for the
pointer...just confirmed that I have to do something I wanted to avoid. 
But I guess if I use Python's os module and the __path__ string, it should
still be nicely portable.  It just seems that since Python is gathering
that information anyway, it should make it available without me having to
walk the directory tree.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From goodTweetieBird at hotmail.com  Tue Mar 20 14:59:10 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 20 Mar 2007 11:59:10 -0700
Subject: Imports
In-Reply-To: <1174416672.629041.122320@l77g2000hsb.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>
Message-ID: <1174417150.930765.141160@l77g2000hsb.googlegroups.com>

On Mar 20, 1:51 pm, kyoso... at gmail.com wrote:
> On Mar 20, 1:31 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
>
>
>
> > I am working with a tool called maxQ that generates jython scripts.
> > The tool runs in
>
> > C:\maxq\bin.
>
> > Rather than clutter up bin I want to put the scripts and other .py
> > scripts in
>
> > c:\maxq\bin\testScripts.
>
> > When doing so the scripts need to import from
>
> > c:\maxq\jython, but can't find the modules.
>
> > I tried adding c:\maxq\jython to the environment variable pythonpath
> > but to no avail. Perhaps I missed it in Rossum's tutorial but is there
> > a std prgrammatic way to specify a module directory?
>
> > Could you, would you, recommend a text or another webpage for learning
> > more (much more) about python?
>
> > Thanx,
>
> > gtb
>
> I typically just import sys and then do a
> sys.path.append(directoryPath). This basically makes whatever modules
> in that path available at run time. If you need a beginners reference
> book, I recommend "Beginning Python" by Hetland. "Python Programming
> for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
> get into the internals of the language like Hetland does. Once you're
> a snake charmer too, you can "graduate" to the "Programming Python"
> book by Lutz.
>
> Mike

Something else going on then, does the directory path need to be the
full path or will it search sub-directories?

Traceback (most recent call last):
  File "C:\maxq-0.98\bin\testScripts\compactLogin.py", line 2, in
<module>
    from CompactTest import CompactTest
  File "c:\maxq-0.98\jython\CompactTest.py", line 2, in <module>
    from java.lang import *
ImportError: No module named java.lang

Thanks for the book recommendations.

gtb



From steve at holdenweb.com  Fri Mar 16 07:24:15 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 16 Mar 2007 07:24:15 -0400
Subject: problem with str()
In-Reply-To: <1hv1bk3.modl62cxe9w3N%aleax@mac.com>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>	<mailman.5149.1173990948.32031.python-list@python.org>	<1173992205.985657.167970@y66g2000hsf.googlegroups.com>	<mailman.5154.1173999970.32031.python-list@python.org>	<1hv191c.1bj9j73fp25ldN%aleax@mac.com>	<mailman.5163.1174014892.32031.python-list@python.org>
	<1hv1bk3.modl62cxe9w3N%aleax@mac.com>
Message-ID: <etdurk$eqc$1@sea.gmane.org>

Alex Martelli wrote:
> Steve Holden <steve at holdenweb.com> wrote:
>    ...
>>>> Get yourself a stuffed bear, and next time you have this kind of problem
>>>> spend a few minutes explaining to the bear exactly how your program
>>>> can't possibly be wrong. Works like a charm.
>>> A rubber ducky works much better for that, btw -- more easily washable
>>> than a stuffed bear, for example.
>>>
>> But stuffed bears are so much more knowledgeable about the minutiae of
>> software design.
> 
> And yet, the key to Python's strength is duck typing -- if you can teach
> the duck to type, you've got it made.
> 
> 
That's bearly a joke at all :)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From bbxx789_05ss at yahoo.com  Fri Mar 16 16:10:10 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 13:10:10 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
Message-ID: <1174075809.968650.96030@e1g2000hsg.googlegroups.com>

How about:

-----------
x = [0, 100, 200, 1000]
y = -1
inserted = False

for i in range(len(x)):
        if(y <= x[i]):
                x.insert(i, y)
                inserted = True
                break
if(not inserted): x.append(y)

print x
------------



From gert.cuykens at gmail.com  Fri Mar  2 00:27:19 2007
From: gert.cuykens at gmail.com (gert)
Date: 1 Mar 2007 21:27:19 -0800
Subject: html sql client
Message-ID: <1172813239.754095.231900@p10g2000cwp.googlegroups.com>

Anybody who is interested in a sql client with a html interface

http://sourceforge.net/projects/dfo/

db7 is for python based on cherrypy, code is straightforward and easy
to modify so it can work with other sql databases.

db5 was before i knew pyhton :)

Suggestions very welcome about what to do next.

I was thinking about making a column module that names the columns, i
was hoping there would be some sort of api feature that already exist
because parsing sql statemants to figure out which column is refers to
what is allot of work.



From jareguero at telefonica.net  Mon Mar 19 17:07:07 2007
From: jareguero at telefonica.net (Jose Alberto Reguero)
Date: Mon, 19 Mar 2007 22:07:07 +0100
Subject: Problem with sockets and python 2.5
Message-ID: <200703192207.08178.jareguero@telefonica.net>

I had two programs, server.py and client.py(attached)

1:
	server.py at i386 python 2.4
	client.py at x86_64 python 2.5
Work

2:
	server.py at x86_64 python 2.5
	client.py at i386 python 2.4
Don't work

Any ideas?
Thanks.

Jose Alberto
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From nick at craig-wood.com  Mon Mar 12 07:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 12 Mar 2007 06:30:04 -0500
Subject: Bitpacked Data
References: <45f47994$0$37205$4fafbaef@reader3.news.tin.it>
Message-ID: <slrnevacd5.dr9.nick@irishsea.home.craig-wood.com>

none <""> wrote:
>  i need to interface python with a bitpacked data file,
>  the structure recorded in the file is the following:
> 
>  struct {
>  var_1 4bit
>  var_2 6bit
>  var_3 2bit
>  var_3 4bit
>  }
> 
>  how can read the struct and convert data into dictionary

You could try Construct

  http://construct.wikispaces.com/

This allows you to build a python class which will translate to and
from that datastructure.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From r1chardj0n3s at gmail.com  Thu Mar  1 12:57:14 2007
From: r1chardj0n3s at gmail.com (r1chardj0n3s at gmail.com)
Date: 1 Mar 2007 09:57:14 -0800
Subject: Vector, matrix, normalize, rotate. What package?
In-Reply-To: <1172616572.045690.17550@k78g2000cwa.googlegroups.com>
References: <1172616572.045690.17550@k78g2000cwa.googlegroups.com>
Message-ID: <1172771834.335596.139750@s48g2000cws.googlegroups.com>

On Feb 27, 4:49 pm, "Mattias Br?ndstr?m" <thebra... at brasse.org> wrote:
> Hello!
>
> I'm trying to find what package I should use if I want to:
>
> 1. Create 3d vectors.
> 2. Normalize those vectors.
> 3. Create a 3x3 rotation matrix from a unit 3-d vector and an angle in
> radians.
> 4. Perform matrix multiplication.
>
> It seems to me that perhaps numpy should be able to help me with this.
> However, I can only figure out how to do 1 and 4 using numpy. Meybe
> someone knows a way to use numpy for 2 and 3? If not, what Python
> package helps me with geometry related tasks such as 2 and 3?

Try Alex Holkner's euclid.py module:

   http://cheeseshop.python.org/pypi/euclid/0.01


    Richard



From tinaweb at bestemselv.com  Mon Mar 26 02:25:42 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Mon, 26 Mar 2007 08:25:42 +0200
Subject: __init__.py
Message-ID: <q8ydnRG5jr36-prbRVnzvA@telenor.com>

When looking at other peoples code (to learn from it) I keep seeing an 
empty file named "__init__.py". What's the purpose of this?

Thanks
Tina


From steve at REMOVE.THIS.cybersource.com.au  Mon Mar 19 23:55:06 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 14:55:06 +1100
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.20.03.55.04.836164@REMOVE.THIS.cybersource.com.au>

On Mon, 19 Mar 2007 07:41:59 -0700, Ben wrote:

> I have recently learned how list comprehension works and am finding it
> extremely cool.  I am worried, however, that I may be stuffing it into
> places that it does not belong.

Others have suggested reasons why you might or might not want to use list
comprehensions. Here's three more reasons:

* You have a LOT of data to handle. (But remember that a lot to you might
not be a lot to your computer.)

* You don't need to handle the items all at once, and can handle the items
one at a time instead.

Use an iterator, generator expression, or other lazily-evaluated function
instead. That way you avoid forming the list all at once.

* You have to write code that's backwards-compatible to an old version of
Python.

Use a list and a for-loop.



-- 
Steven.



From lbates at websafe.com  Tue Mar 13 11:07:21 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 13 Mar 2007 10:07:21 -0500
Subject: CD insert/eject detection
In-Reply-To: <1173797681.851722.41340@64g2000cwx.googlegroups.com>
References: <1173797681.851722.41340@64g2000cwx.googlegroups.com>
Message-ID: <45F6BE29.40802@websafe.com>

Mark Bryan Yu wrote:
> Hi,
> 
> I'm trying to make a Audio CD ripper using python.
> 
> is there a way (library, module, etc) to detect when a CD was inserted
> or ejected?
> 
That is going to be OS dependent, so please share with us
what OS you are on?

-Larry


From btl at fischerinternational.com  Mon Mar  5 08:55:20 2007
From: btl at fischerinternational.com (Bryan Leber)
Date: Mon, 5 Mar 2007 08:55:20 -0500
Subject: Help Deciphering Code
Message-ID: <3671C2002ECC9149B2B5509290F533A678FA30@fiscex.FISCHERINTERNATIONAL.COM>

Good Morning,

I am learning python and I am having to make some changes on an existing
python script. What happens is that one scripts creates an xml document
that looks like this:

 

<CommitOperation
file="IPM2.1/Identity/IdentityWebApp/Source/com/fisc/prioss/dataservice/
component/profile ProfileUtil.java" message="PATCH_BRANCH: N/A
BUG_NUMBER: N/A FEATURE_AFFECTED: N/A OVERVIEW: Changes for not
including the product configuration account, idmconfig in searches. ""
module="IPM2.1"

 

The first attribute "file" as you can see shows the path where the file
is and then a space and the actual file name. This is put into a
variable named file. Then in the script, there is a method called that
passes in this variable. The first line in the method called is this:

 

          reg = re.compile(r'[\\]+[ ]+')

 

I'm not 100% sure what this is doing, but I believe it is trying to
parse the file variable so that you only get the file name. It is weird
because this had been working just fine until about 2 months ago then it
just started not parsing anything. If anyone can help please help:-)

 

Thanks,

 

Bryan Leber

Developer

Fischer International Corporation

www.fischerinternational.com <http://www.fischerinternational.com> 

bryan.leber at fischerinternational.com
<mailto:bryan.leber at fischerinternational.com> 

Cell:(239)963-5267

 

Secure Your Risk. Increase Your Bottom Line. (tm)

 


**************************************************************************************************************************

This mail message may contain confidential and privileged information from Fischer International which is
protected. Any unauthorized review, use, disclosure or distribution by any means is prohibited. If you are 
not the intended recipient, please contact the sender by reply email and destroy all copies of the original 
message.

**************************************************************************************************************************

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From gagsl-py2 at yahoo.com.ar  Sun Mar 25 13:09:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 14:09:25 -0300
Subject: Using remote source code
References: <1174795795.112606.21720@e65g2000hsc.googlegroups.com>
	<1hvi1i4.11qqgaq109btn3N%aleax@mac.com>
	<1174801187.128393.238840@o5g2000hsb.googlegroups.com>
	<46061F6D.40909@ncee.net>
Message-ID: <op.tpq8lzy3x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 04:06:21 -0300, Shane Geiger <sgeiger at ncee.net>  
escribi?:

> I see that you aren't using ihooks.  Below is an example I found that
> uses ihooks.  I think it would be worth comparing and contrasting both
> approaches (though I am not familar enough with this aspect of Python to
> do so).  IIRC, this code addresses some path related issues of other
> import-from-file methods.

ihooks is rather old and undocumented except for a comment saying that it  
"may become obsolete".
PEP 302 sets the recomended way now, AFAIK.

-- 
Gabriel Genellina



From wgwigw at gmail.com  Thu Mar 22 21:13:51 2007
From: wgwigw at gmail.com (momobear)
Date: 22 Mar 2007 18:13:51 -0700
Subject: how can I invoke a Java code?
In-Reply-To: <etv8ee$6vd$1@aioe.org>
References: <1174610940.971724.206900@l75g2000hse.googlegroups.com>
	<etv8ee$6vd$1@aioe.org>
Message-ID: <1174612430.983470.233360@b75g2000hsg.googlegroups.com>


> If you're wanting to interact with the code, your best option may be
> Jython, an implementation of Python in Java.
I do have to interact with Java module, and when talk about Jython,
since I use third parts of python modules I am puzzled about it.



From bdesth.quelquechose at free.quelquepart.fr  Sun Mar 11 13:56:14 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 11 Mar 2007 18:56:14 +0100
Subject: Python in a desktop environment
In-Reply-To: <1173605193.585675.217210@30g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
Message-ID: <45f43a97$0$31995$426a74cc@news.free.fr>

David Cramer a ?crit :
> On Mar 10, 10:52 pm, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com>
> wrote:
> 
>>David Cramer wrote:
>>
>>>If you had an application that you were about to begin development on
>>>which you wanted to be cross platform (at least Mac and Windows),
>>>would you suggest using c++ and Python?
>>
>>I'd strongly consider a pure python solution (I'd choose wxpython),
>>but if I needed to code backend stuff in a lower level language I'd
>>use C rather than C++.
> 
> 
> Well we want it to be very robust,

Which is a pretty good reason to favor Python over C or C++.

> and python isn't exactly the
> fastest language, or one with the lowest overhead :)

It's not exactly one of the slowest languages nor one with the highest 
overhead neither. Chances are you'll have a fully-functional production 
level app in Python *way* before you have a first alpha in C++. If by 
then you *really* have some performance problem, it will be time to port 
the relevant modules to C extensions.


From mdfranz at gmail.com  Thu Mar  1 14:49:09 2007
From: mdfranz at gmail.com (Matthew Franz)
Date: Thu, 1 Mar 2007 13:49:09 -0600
Subject: Curious UnboundLocalError Behavior
In-Reply-To: <1172737205.386931.85040@z35g2000cwz.googlegroups.com>
References: <mailman.4517.1172682923.32031.python-list@python.org>
	<1172737205.386931.85040@z35g2000cwz.googlegroups.com>
Message-ID: <33acb3db0703011149w35e92da3j2ed5ee05575bff6c@mail.gmail.com>

I had tried the global prefix in the real code (vs. the contrived
example in the post), but in the incorrect code block, which made me
think something else was up. Yes, these were supposed to be constants
that under rare circumstances were changed ;)  In the end, I  scrapped
the rebind approach, because that wasn't the behavior I wanted
either.Thanks for the help.

- mdf

On 1 Mar 2007 00:20:05 -0800, bruno.desthuilliers at gmail.com
<bruno.desthuilliers at gmail.com> wrote:
> On 28 f?v, 18:15, "Matthew Franz" <mdfr... at gmail.com> wrote:
> > I'm probably fundamentally misunderstanding the way the interpreter
> > works with regard to scope, but is this the intended behavior...
> >
> (snip traceback)
>
> > import os,sys
> >
> > SOMEGLOBAL=1
> >
> > def foo():
> >     dome=False
> >     if dome:
> >         SOMEGLOBAL = 0
>
>
> This makes SOMEGLOBAL local !-)
>
> Look for the 'global' statement. Or better, try to avoid rebinding
> globals from within a function.
>
> As as side note: by convention, ALL_UPPER names denote constants.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
Matthew Franz
http://www.threatmind.net/


From sjdevnull at yahoo.com  Sat Mar 10 14:10:08 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 10 Mar 2007 11:10:08 -0800
Subject: minimum age to learn python (a.k.a graphical vs text languages)
In-Reply-To: <mailman.4905.1173540820.32031.python-list@python.org>
References: <mailman.4905.1173540820.32031.python-list@python.org>
Message-ID: <1173553808.255770.182540@64g2000cwx.googlegroups.com>

Brian Blais wrote:
> Hello,
>
> I was wondering what the approximate minimum age to learn python is.  Has anyone had
> experience teaching middle school students, or elementary school students Python?
> What brought this up for me is thinking about starting a Lego robots group in a local
> middle school.  I only teach college, and have little experience with middle school
> students, so I find it hard to guess what they could actually do.  I started
> programming when I was about 5th grade, on a Commodore VIC 20 (3.5k RAM!) in basic,
> but I don't think I am typical.

Our elementary school taught LOGO on the Apple II in either 3rd or 4th
grade, and the more advance math students got some BASIC by 5th
grade.  It was just a regular school, so it seems to me like kids in
the age range you're discussing are fully capable of learning at least
some programming.



From donn at u.washington.edu  Tue Mar  6 12:20:44 2007
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 06 Mar 2007 09:20:44 -0800
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
	<mailman.4595.1172792873.32031.python-list@python.org>
	<donn-B606A8.09385902032007@gnus01.u.washington.edu>
	<mailman.4695.1173143028.32031.python-list@python.org>
Message-ID: <donn-CA413D.09204406032007@gnus01.u.washington.edu>

In article <mailman.4695.1173143028.32031.python-list at python.org>,
 "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Fri, 02 Mar 2007 14:38:59 -0300, Donn Cave <donn at u.washington.edu>  
> escribi?:
> 
> > In article <mailman.4595.1172792873.32031.python-list at python.org>,
> >  "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:
> >
> >> On http://docs.python.org/lib/popen2-flow-control.html there are some
> >> notes on possible flow control problems you may encounter.
> >
> > It's a nice summary of one problem, a deadlock due to full pipe
> > buffer when reading from two pipes.  The proposed simple solution
> > depends too much on the cooperation of the child process to be
> > very interesting, though.  The good news is that there is a real
> > solution and it isn't terribly complex, you just have to use select()
> > and UNIX file descriptor I/O.  The bad news is that while this is
> > a real problem, it isn't the one commonly encountered by first
> > time users of popen.
> 
> More bad news: you can't use select() with file handles on Windows.

Bad news about UNIX I/O on Microsoft Windows is not really news.
I am sure I have heard of some event handling function analogous
to select, but don't know if it's a practical solution here.

> >> If you have no control over the child process, it may be safer to use a
> >> different thread for reading its output.
> >
> > Right - `I used threads to solve my problem, and now I have two
> > problems.'  It can work for some variations on this problem, but
> > not the majority of them.
> 
> Any pointers on what kind of problems may happen, and usual solutions for  
> them?
> On Windows one could use asynchronous I/O, or I/O completion ports, but  
> neither of these are available directly from Python. So using a separate  
> thread for reading may be the only solution, and I can't see why is it so  
> bad. (Apart from buffering on the child process, which you can't control  
> anyway).

I wouldn't care to get into an extensive discussion of the general
merits and pitfalls of threads.  Other than that ... let's look at
the problem:

 - I am waiting for child process buffered output
 - I have no control over the child process

Therefore I spawn a thread to do this waiting, so the parent thread
can continue about its business.  But assuming that its business
eventually does involve this dialogue with the child process, it
seems that I have not resolved that problem at all, I've only added
to it.  I still have no way to get the output.

Now if you want to use threads because you're trying to use Microsoft
Windows as some sort of a half-assed UNIX, that's a different issue
and I wouldn't have any idea what's best.

   Donn Cave, donn at u.washington.edu


From sgeiger at ncee.net  Tue Mar 20 01:57:44 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 20 Mar 2007 00:57:44 -0500
Subject: using regexp
In-Reply-To: <45FF7646.5030801@ncee.net>
References: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>
	<45FF7646.5030801@ncee.net>
Message-ID: <45FF77D8.4060806@ncee.net>


import re
line = '123456789123456789'
print re.findall('([0-9]{3})', line)



Shane Geiger wrote:
> You don't even need regex.
>
> def 
> split_seq(seq,size):                                                                                                               
>
>    # this is sort of the inverse of 
> flatten                                                                                           
>
>    # Source: 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/425044                                                           
>
>    return [seq[i:i+size] for i in range(0, len(seq), 
> size)]                                                                           
>
>                                                                                                                                       
>
> line = 
> '123456789123456789'                                                                                                            
>
>                                                                                                                                       
>
> print 
> split_seq(line,3)                                                                                                                
>
>
>
> Will that work for you?
>
>
>
> s99999999s2003 at yahoo.com wrote:
>> hi
>> how can i use regexp to group these digits into groups of 3?
>>
>> eg
>> line 123456789123456789
>>
>> i have :
>>
>> pat = re.compile("line\s+(\d{3})" , re.M|re.DOTALL)
>>
>> but this only gives the first 3. I also tried
>>
>> "line\s+(\d{3})+"
>> but also not working.
>> I need output to be ['123' ,'456','789', '123','456','789', .....]
>> thanks.
>>
>>   
>

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From greg at cosc.canterbury.ac.nz  Sun Mar  4 19:45:30 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Mon, 05 Mar 2007 13:45:30 +1300
Subject: Questions about app design - OOP with python classes
In-Reply-To: <y_tGh.5006$M65.2770@newssvr21.news.prodigy.net>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<54q5lnF22aafrU1@mid.uni-berlin.de>
	<pan.2007.03.03.22.22.48.4257@REMOVE.THIS.cybersource.com.au>
	<y_tGh.5006$M65.2770@newssvr21.news.prodigy.net>
Message-ID: <5517lmF228dckU1@mid.individual.net>

John Nagle wrote:

>     The Pascal/Ada/Modula family of languages all had type systems
> with restrictions on conversion.  Unlike C, types in Pascal
> are not simply abbreviations of the type; they're unique types.

Ada is the only one of those that would let you
define things like "a new kind of integer" that
is not compatible with other integers.

Pascal and Modula just had a fixed set of numeric
types with various predefined compatibility
rules, not much different from C.

--
Greg


From codecraig at gmail.com  Mon Mar 19 14:36:29 2007
From: codecraig at gmail.com (abcd)
Date: 19 Mar 2007 11:36:29 -0700
Subject: Load three different modules which have the same name
Message-ID: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>

I have the following directory structure setup...

c:\alpha\Person.py
------------------
class Person(IPerson):
    def __init__(self):
        print "Alpha person here"

c:\beta\Person.py
------------------
class Person(IPerson):
    def __init__(self):
        print "Beta person here"

c:\gamma\Person.py
------------------
class Person(IPerson):
    def __init__(self):
        print "Gamma person here"

c:\ok\playground.py
-------------------
def tryAllThree():
    a = "c:\\alpha"
    b = "c:\\beta"
    g = "c:\\gamma"

    sys.path.append(a)
    from Person import Person
    alpha = Person()

    sys.path.remove(a)
    sys.path.append(b)
    from Person import Person
    beta = Person()

    sys.path.remove(b)
    sys.path.append(g)
    from Person import Person
    gamma = Person()

Notice that my three different projects (alpha, beta, gamma) have a
Person.py which contains a Person class.

When I execute the following (on windows):

c:\ok> python
>>> from playground import *
>>> tryAllThree()

I see...
Alpha person here
Alpha person here
Alpha person here

What I want to see is
Alpha person here
Beta person here
Gamma person here

....how can I get this to work?

Thanks



From spohle at gmail.com  Mon Mar 26 11:00:29 2007
From: spohle at gmail.com (spohle)
Date: 26 Mar 2007 08:00:29 -0700
Subject: calling class instances and their methods
Message-ID: <1174921229.208577.8290@e65g2000hsc.googlegroups.com>

hi,

i created an instance of a my own class which has methods and all. now
i get an outside function called, which is unfortunatly not aware of
the instace at all (i don't control how this outside function is
called). but i would like to get access back to my instance and it's
methods.

is there any clean way of doing this ?

thanks in advance



From arnodel at googlemail.com  Thu Mar  1 15:04:48 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 1 Mar 2007 12:04:48 -0800
Subject: class declaration shortcut
In-Reply-To: <xemdnYBwM6UetnrYnZ2dnUVZ_qarnZ2d@comcast.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
	<YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
	<1172772214.569734.95990@n33g2000cwc.googlegroups.com>
	<xemdnYBwM6UetnrYnZ2dnUVZ_qarnZ2d@comcast.com>
Message-ID: <1172779488.418564.90880@j27g2000cwj.googlegroups.com>

On Mar 1, 7:37 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Arnaud Delobelle wrote:
> > On Mar 1, 4:01 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> >> Arnaud Delobelle wrote:
> > [...]
> >> This does pretty much the same thing as the recipe I posted:
>
> > Not at all.  My new_struct create returns a new class which is similar
> > to a C struct (notice the __slots__).  The recipe you refer to is
> > nothing more a class which can be initialised with some attributes. It
> > does not address the OP's question at all.
>
> >>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237
>
> Huh?  It uses __slots__ in almost exactly the same way.

I'm sorry I somehow got my hyperlinks mixed up and though you were
refering to

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/361668

which was mentioned by someone else on this thread.  If I had seen
yours I wouldn't have posted this.  So my comment on you link was
completely erroneous as, as you are pointing out, the functionality of
my code snippet and your link are very similar.  Mine was only a proof
of concept bit of code, so yours is more polished.

Although I don't see the necessity of a metaclass: you could have

class Record(object):
    def __init__(self, *vals):
        for slot, val in zip(self.__slots__, vals):
            setattr(self, slot, val)
    # And the other methods

if you want positional slots initialisation.  I chose keyword
arguments in mine because I though it would be a good idea to be able
not to initialise some of them at object instanciation.

--
Arnaud



From steven.klass at gmail.com  Tue Mar 20 12:22:25 2007
From: steven.klass at gmail.com (rh0dium)
Date: 20 Mar 2007 09:22:25 -0700
Subject: #!/usr/bin/env python > 2.4?
Message-ID: <1174407745.208492.264020@l75g2000hse.googlegroups.com>

Hi Folks,

OK I love the logging module.  I use it everywhere.  I was happily
putting at the top of each of my scripts

------<snip>------
#!/usr/bin/env python2.4

import logging

LOGLEVEL=logging.INFO

# Set's up a basic logger
logging.basicConfig(level=LOGLEVEL, format="%(asctime)s %(name)s %
(levelname)-8s %(message)s",
                    datefmt='%d %b %Y %H:%M:%S', stream=sys.stderr)

try:
    module= os.path.basename(traceback.extract_stack(limit=2)[1]
[0]).split(".py")[0]+"."
except:
    module = os.path.basename(traceback.extract_stack(limit=2)[0]
[0]).split(".py")[0]+"."

def main(loglevel=False):
    """ """
    # Setup Logging
    log = logging.getLogger(module+sys._getframe().f_code.co_name )
    if loglevel is not False: log.setLevel(loglevel)
    else:log.setLevel(logging.WARN)

    log.debug("I LOVE LOGGING")

if __name__ == '__main__':
    sys.exit(main(loglevel=LOGLEVEL))


------<snip>------

But now you guys continued to make this cool language and 2.5 came
out. Great now how do I put /usr/bin/env python>2.4?

Or can you suggest a better way to skin this cat?

Thanks again!!



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 15 11:23:12 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 15 Mar 2007 16:23:12 +0100
Subject: Multiline code - trailing slash usage
In-Reply-To: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
Message-ID: <45f964ba$0$6071$426a74cc@news.free.fr>

abcd a ?crit :
> When do I need to use a trailing slash to separate code over multiple
> lines.
> 
> For example:
> 
> x = "hello world, this is my multiline " + \
>      "string!!!!"

Here you don't need the +

> x = {'name' : \
>       'bob'}

And here you don't need the antislash

> Do I need to use the "\" in the above examples?  When do i need to use
> it?
> 

IIRC, lists, tuples and dicts litterals, function args, list comps and 
generator expressions can span multiple lines. In any other case, you 
need the antislash. But you'd better check in the FineManual...


From aisaac at american.edu  Sun Mar 11 14:31:39 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sun, 11 Mar 2007 18:31:39 GMT
Subject: Putting Metaclasses to Work
Message-ID: <fWXIh.237$y56.72@trnddc07>

Forman's book is out of print.
Is there a good substitute?

Thanks,
Alan Isaac




From tjreedy at udel.edu  Thu Mar  8 14:38:27 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 Mar 2007 14:38:27 -0500
Subject: Where to "import"?
References: <1173379952.901004@iceman.esoterica.pt>
Message-ID: <esponi$9js$1@sea.gmane.org>


"Paulo da Silva" <psdasilvaX at esotericaX.ptX> wrote in message 
news:1173379952.901004 at iceman.esoterica.pt...
| Hi!
|
| If I have two files .py such as
|
| m.py
| from c import *
| ...
| x=c()
| ...
| os.any_method ...
| ...
|
| c.py
| class c:
| def __init__(self, ...):
| ...
| os.any_method ...
| ...
| ...
|
| both using os module where should I put the "import os"? In both files?

I would even though having it in m.py is not *currently* necessary.  Having 
the import of os into m.py depend on the way you write and import c.py 
looks fragile, and it certainly is a memory burden to remember that c does 
so.  Also, I probably would use 'import c' instead.

tjr





From gagsl-py2 at yahoo.com.ar  Wed Mar  7 19:51:27 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 21:51:27 -0300
Subject: Flatten a two-level list --> one liner?
References: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>
	<op.tougqyqzx6zn5v@gabriel2.softlabbsas.com.ar>
	<f1aa6d810703071641g61b4d40fwdfb767235afa17be@mail.gmail.com>
Message-ID: <op.touhz1rmx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 21:41:16 -0300, Sergio Correia  
<sergio.correia at gmail.com> escribi?:

> I forgot to say: I've already checked the discussions about
> recursive/iterative/etc flatten() functions that can sweep through a
> list of arbitrary length, but that's really overkill for what I want.
>
> However, "sum(eggs, [])" or itertools seem to do it w/out the need for
> a new function.
>
> Thanks a lot!

Just for being (a little!) constructive, given your preconditions on the  
list, you can use:
eggs = [item for sublist in spam for item in sublist]

-- 
Gabriel Genellina



From jeff at jmcneil.net  Sat Mar 10 16:26:12 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Sat, 10 Mar 2007 16:26:12 -0500
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
Message-ID: <82d28c40703101326u69d31c8cv1e9223e0b1ec667d@mail.gmail.com>

Sure, you can use "if key in dict" to test for membership:


Python 2.3.5 (#1, Jan 13 2006, 20:13:11)
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> exampledict = {"a" : 1, "b" : 2}
>>> "a" in exampledict
True
>>> "q" in exampledict
False
>>>

Alternatively, "exampledict.has_key("a")" is also valid.

See:

http://docs.python.org/tut/node7.html#SECTION007500000000000000000

-Jeff

On 10 Mar 2007 13:17:11 -0800, Frank <supervau at gmail.com> wrote:
> Hi,
>
> does anyone know how one can test if, e.g., a dictionary 'name' has a
> key called 'name_key'?
>
> This would be possible:
>
> keys_of_names = names.keys()
> L = len(keys_of_names)
>
> for i in range(L):
> if keys_of_names[i] == name_key:
> print 'found'
>
>
> But certainly not efficient. I would expect there is something like:
>
> name.is_key(name_key)
>
> I appreciate your help!
>
> Frank
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From yaguarovi at gmail.com  Wed Mar 14 14:16:31 2007
From: yaguarovi at gmail.com (Jean-Philippe Durand)
Date: Wed, 14 Mar 2007 19:16:31 +0100
Subject: Python & Oracle
In-Reply-To: <d25b6e9a0703141106j70d58da1w1ed6e8ad5b565b8e@mail.gmail.com>
References: <et9d8r$vga$1@sea.gmane.org>
	<d25b6e9a0703141106j70d58da1w1ed6e8ad5b565b8e@mail.gmail.com>
Message-ID: <9f6eb18c0703141116k7f9a117cy6d3ab8accbefb195@mail.gmail.com>

So do I !

2007/3/14, Josh Bloom <joshbloom at gmail.com>:
> I would suggest using cx_Oracle as I have had good experience with it.
> http://www.cxtools.net/default.aspx?nav=cxorlb
>
> -Josh
>
>
> On 3/14/07, Facundo Batista <facundo at taniquetil.com.ar> wrote:
> > Hi! I need to connect to Oracle.
> >
> > I found this binding,
> >
> >   http://www.zope.org/Members/matt/dco2
> >
> > that is the recommended in the Python page.
> >
> > But that page seems a bit confuse to me. In the upper right corner says
> > that the last release is PreRelease 1, from 2001-11-15.
> >
> > At the bottom, however, it says that 1.3 beta was released 2003-02-10,
> > and is a development version (the last stable is 1.2, from 2002-10-02),
> > four and a half years ago.
> >
> > The question is: is this connector the recommended one? it's aged
> > because it's stable and no more changes are necessary, or it just dead?
> > Works Ok?
> >
> > Thank you!! Regards,
> >
> > --
> > .   Facundo
> > .
> > Blog: http://www.taniquetil.com.ar/plog/
> > PyAr: http://www.python.org/ar/
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From steve at holdenweb.com  Wed Mar 14 12:53:25 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 12:53:25 -0400
Subject: (beginners) howto ascribe _all_ fields of parent class to child
	class?
In-Reply-To: <1173889732.055694.264510@p15g2000hsd.googlegroups.com>
References: <1173889732.055694.264510@p15g2000hsd.googlegroups.com>
Message-ID: <et99cs$9fe$2@sea.gmane.org>

dmitrey wrote:
> Hi all,
> I'm rewriting some code from other language  to Python; can anyone
> explain me which way is the simpliest:
> I have
> class C1():
>     def __init__(self):
>          self.a = 5
> 
> class C2(C1):
>     def __init__(self):
>          self.b = 8
> 
> c = C2()
> print c.b#prints 8
> print c.a#prints error, because field a is absent
> 
> so how can I wrote the code that I'll got all class C1 fields (not
> only funcs)
> 
> Thank you in advance,
> Dmitrey
> 

The only problem here is that your subclass doesn't call the __init__ 
method of the superclass. Rewrite your C2 definition to read

class C2(C1):
     def __init__(self):
          C1.__init__(self)
          self.b = 8

and you should find your example works as you want.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From max at knirz.de  Fri Mar 30 05:09:24 2007
From: max at knirz.de (Max Kubierschky)
Date: Fri, 30 Mar 2007 11:09:24 +0200
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <5741ueF2bgl92U1@mid.uni-berlin.de>
References: <euid24$ugc$1@online.de> <5741ueF2bgl92U1@mid.uni-berlin.de>
Message-ID: <euik44$93e$1@online.de>

Diez B. Roggisch schrieb:
> Max Kubierschky schrieb:
>> Hello,
>>
>> I'm planning to give a game programming course for kids of mixed age.
>> For this, I am looking for an open source 2D game development kit.
>> I am also willing to participate in the development of the development 
>> kit.
>>
>> Features I'd like to see
>> - Possibility to construct simple games via drag and drop without 
>> programming
>> - Integration into an IDE
>> - Based on Java or Python
>> Pluses:
>> - Good Tutorial
>> - German documentation
> 
> Squeak. Smalltalk, but especially targeted at your requirements.
> 
> http://www.squeak.org/
> 
> Diez


What part of Squeak is targeted at 2D game development?



From aleax at mac.com  Sat Mar 10 10:42:28 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 10 Mar 2007 07:42:28 -0800
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
Message-ID: <1hur0ah.tbqxgzjmqcwmN%aleax@mac.com>

jupiter <anil.jupiter9 at gmail.com> wrote:
   ...
> Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
> it dosent allow me to use multi threading so which database module is
> better in terms of multithreading

Perhaps psycopg2 (with PostgreSQL as the engine), according to
<http://cheeseshop.python.org/pypi/psycopg2/2.0.2> it is specifically
"designed for heavily multi-threaded applications that create and
destroy lots of cursors and make a conspicuous number of concurrent
INSERTs or UPDATEs".


Alex




From ms at cerenity.org  Mon Mar  5 20:29:35 2007
From: ms at cerenity.org (Michael)
Date: Tue, 06 Mar 2007 01:29:35 +0000
Subject: Webserver balance load
References: <1173124034.130806.316750@30g2000cwc.googlegroups.com>
Message-ID: <45ecc2bf$0$8739$ed2619ec@ptn-nntp-reader02.plus.net>

Johny wrote:

> Can anyone suggest a way how to balance load on Apache server where I
> have Python scripts running?
> For example I have 3 webservers( Apache servers) and I would like to
> sent user's request to one of the three server depending on a load on
> the server.

To be honest, you're best looking at the Linux Virtual Server project. It's
really cool technology and scales extremely well. You can do things at a
higher level, but LVS does work and scale extremely well. VS-TUN is
particularly useful if you have an unusual network topology.

http://www.linuxvirtualserver.org/


Michael.



From arnodel at googlemail.com  Wed Mar  7 15:09:07 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 7 Mar 2007 12:09:07 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <1173295587.143018.102220@p10g2000cwp.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173295587.143018.102220@p10g2000cwp.googlegroups.com>
Message-ID: <1173298147.598147.322420@c51g2000cwc.googlegroups.com>

On 7 Mar, 19:26, "Miki" <miki.teb... at gmail.com> wrote:
> Hello Arnaud,

Hi Miki

[snip]
> Exceptions are for error handling, not flow control.

Maybe but it's not always that clear cut! As error handling is a form
of flow control the two have to meet somewhere.

[snip]
> As a side note, try to avoid "catch:", always catch explicit
> exceptions.

I didn't specify what I wanted to catch because it didn't feel it was
relevant to the problem.

Thanks

--
Arnaud



From mfmorss at aep.com  Tue Mar 27 10:24:17 2007
From: mfmorss at aep.com (Mark Morss)
Date: 27 Mar 2007 07:24:17 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <4607fbf4$1@nntp.zianet.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
Message-ID: <1175005457.115349.92940@p15g2000hsd.googlegroups.com>

On Mar 26, 12:59 pm, "Erik Johnson" <nob... at invalid.com> wrote:
> <Noma... at gmail.com> wrote in message
>
> news:1174915232.414568.197250 at p15g2000hsd.googlegroups.com...
>
> > OK...
> > I've been told that Both Fortran and Python are easy to read, and are
> > quite useful in creating scientific apps for the number crunching, but
> > then Python is a tad slower than Fortran because of its a high level
> > language nature, so what are the advantages of using Python for
> > creating number crunching apps over Fortran??
> > Thanks
> > Chris
>
>     So, after reading much of animated debate here, I think few would
> suggest that Python is going to be faster than FORTRAN when it comes to raw
> execution speed. Numeric and SciPy are Python modules that are geared
> towards numerical computing and can give substantial performance gians over
> plain Python.
>
>     A reasonable approach (which has already been hinted at here), is to try
> to have the best of both world by mixing Python and FORTRAN - doing most of
> the logic and support code in Python and writing the raw computing routines
> in FORTRAN. A reasonable approach might be to simply make your application
> work in Python, then use profiling to identify what parts are slowest and
> move those parts into a complied language such as FORTRAN or C if overall
> performance is not fast enough.  Unless your number crunching project is
> truly massive, you may find that Python is a lot faster than you thought and
> may be plenty fast enough on it's own.
>
>     So, there is a tradeoff of resources between development time, execution
> time, readability, understandability, maintainability, etc.
>
>     psyco is a module I haven't seen mentioned here - I don't know a lot
> about it, but have seen substantial increases in performance in what little
> I have used it. My understanding is that it produces multiple versions of
> functions tuned to particular data types, thus gaining some advantage over
> the default, untyped bytecode Python would normally produce. You can think
> of it as a JIT compiler for Python (but that's not quite what it is doing).
> The home page for that module is here:  http://psyco.sourceforge.net/
>
> Hope that help,
> -ej

The question as originally framed was a little ignorant, of course.
Python and Fortran are by no means subtitutes.  Python is interpreted,
comprehensively interroperates with just about anything, and is
relatively slow.  Fortran is compiled, interoperates with almost
nothing and is blindingly fast.  So it is like a battle between an
elephant and a whale.

If there is possible substitution, and hence competition, it is
between Python+Numpy/Scipy on the one hand and Python+Fortran, via
F2PY, on the other.  My personal taste is to do things in Fortran when
I can.  It is really pretty simple to write well-structured, clear
code in Fortran 95, and I don't find it troublesome to compile before
I run.  I don't find type declarations to be a nuisance; on the
contrary, I think they're very useful for good documentation.  Also I
am somewhat mistrustful of Numpy/Scipy, because when I visit their
forums, almost all the chatter is about bugs and/or failure of some
function to work on some operating system.  Perhaps I am wrong, but
Python+Numpy/Scipy looks a little unstable.

I understand that the purpose of Numpy/Scipy is to make it possible to
do large-scale numerical computation in Python (practically all
serious numerical computation these days is large-scale) without
paying too much of a penalty in speed (relative to doing the same
thing with a compiled language), but I have not yet been persuaded to
take the trouble to learn the special programming vocabulary,
essential tricks, and so forth, necessar for Numpy/Scipy when Fortran
is ready to hand, very well established, and definitely faster.

I do value Python very much for what it was designed for, and I do
plan eventually to hook some of my Fortran code to Python via F2PY, so
that interoperability with spreadsheets, OLAP and the like on the
front and back ends of my information flow.

Maybe somebody reading this will be able to convince me to look again
at Numpy/Scipy, but for the time being I will continue to do my
serious numerical computation in Fortran.



From facundo at taniquetil.com.ar  Thu Mar 29 13:07:44 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Thu, 29 Mar 2007 17:07:44 +0000 (UTC)
Subject: What is the timeout value of HTTP
References: <1175181779.889368.38170@l77g2000hsb.googlegroups.com>
Message-ID: <eugrov$5rm$1@sea.gmane.org>

ken wrote:

> i.e. how long python will wait for a response in the below code?
>
>    h = httplib.HTTP(self.url, 8080)
>         h.putrequest('GET', '/sample/?url=' + self.url)
>         h.endheaders()

For ever. 

In Py<=2.5, httplib.HTTP doesn't have a timeout, so you have to do
something like:

>>> import socket
>>> socket.setdefaulttimeout(...)
>>> h = httplib.HTTP(...)

Beware that *all* sockets created after the call to setdefaulttimeout()
will have that default.

httplib.HTTP now has a timeout, but in the development trunk (you'll
have to checkout the SVN code and compile Python yourself, or wait until
Py2.6).

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From rshepard at nospam.appl-ecosys.com  Thu Mar  1 09:34:59 2007
From: rshepard at nospam.appl-ecosys.com (rshepard at nospam.appl-ecosys.com)
Date: 1 Mar 2007 14:34:59 GMT
Subject: Extract String From Enclosing Tuple
References: <slrneubq5t.1j3.rshepard@salmo.appl-ecosys.com>
	<1172698436.159985.30360@p10g2000cwp.googlegroups.com>
Message-ID: <slrneudp4k.c8d.rshepard@salmo.appl-ecosys.com>

On 2007-02-28, attn.steven.kuo at gmail.com <attn.steven.kuo at gmail.com> wrote:

>>>> import itertools
>>>> tuple(itertools.chain((t[0], t2[0].encode('ascii')), t[2:]))
> ('eco', 'Roads', 0.073969887301348305)

Steven,

  As suggested in the previous article, I handled it where the values are
read from the list retrieved from the database. By adding an additional
index of [0] the format is correct.

Thank you all very much,

Rich


From adonis at REMOVETHISearthlink.net  Mon Mar 19 15:42:01 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 19 Mar 2007 19:42:01 GMT
Subject: Writing files
In-Reply-To: <1174332921.714624.72720@n76g2000hsh.googlegroups.com>
References: <goBLh.129192$_73.83550@newsread2.news.pas.earthlink.net>
	<1174332921.714624.72720@n76g2000hsh.googlegroups.com>
Message-ID: <dIBLh.11554$PL.640@newsread4.news.pas.earthlink.net>

kyosohma at gmail.com wrote:
<snip>
>>
>> -- code --
>>
>>      def _scan(self):
>>          outFile = file("mp3.dat", "wb")
>>          outCSV = csv.writer(outFile)
>>          output = list()
>>          for root, dirs, files in os.walk(self.directory):
>>              files = [x for x in files if x.endswith(".mp3")]
>>              for aFile in sorted(files):
>>                  mp3Data = MP3(os.path.join(root, aFile))
>>                  title = mp3Data.get("TIT2")
>>                  output.append([root, aFile, title])
>>              outCSV.writerows(output)
>>              output = list()
> 
> Are you closing the file before you try to read it? Other than that,
> I'm drawing a blank with just this sample to work with. Maybe someone
> else will know...or you could post more code?
> 
> Mike
> 


Actually, I re-ran this in a terminal and it worked perfectly. I was 
using IDLE to write this code, kinda peculiar. Maybe something to do 
with IDLE and CSV (or writing to files) with lines > ~1000. A socket 
timing out maybe?

Thanks anyways.

Adonis


From nogradi at gmail.com  Sun Mar  4 15:48:31 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 4 Mar 2007 21:48:31 +0100
Subject: list-like behaviour of etree.Element
Message-ID: <5f56302b0703041248k1d2b3d85g1cf9954eed475c22@mail.gmail.com>

The etree.Element (or ElementTree.Element) supports a number of
list-like methods: append, insert, remove. Any special reason why it
doesn't support pop and extend (and maybe count)?


From jordan.taylor2 at gmail.com  Wed Mar 14 12:39:03 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 14 Mar 2007 09:39:03 -0700
Subject: logging and wx.Timer
In-Reply-To: <gdSJh.6304$Ng1.1551@newsfe19.lga>
References: <gdSJh.6304$Ng1.1551@newsfe19.lga>
Message-ID: <1173890343.427588.285370@l77g2000hsb.googlegroups.com>

On Mar 14, 1:52 am, hg <h... at nospam.org> wrote:
> Hi,
>
> I read that logging was thread safe ... but can I use it under a GUI timer ?
>
> Thanks,
>
> hg

That was barely enough information to be worthy of a reply.  Need more
than that.  What do you mean under a gui timer? What gui? What type of
usage? More info = more (and better) help.  Cheers.

JT



From DustanGroups at gmail.com  Sun Mar 18 08:35:51 2007
From: DustanGroups at gmail.com (Dustan)
Date: 18 Mar 2007 05:35:51 -0700
Subject: Private data
In-Reply-To: <1174220273.356129.222080@n76g2000hsh.googlegroups.com>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<mailman.5244.1174213592.32031.python-list@python.org>
	<1174220273.356129.222080@n76g2000hsh.googlegroups.com>
Message-ID: <1174221351.577336.14010@n59g2000hsh.googlegroups.com>

On Mar 18, 7:17 am, "Dustan" <DustanGro... at gmail.com> wrote:
> On Mar 18, 5:26 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>
>
>
> > En Sat, 17 Mar 2007 13:31:01 -0300, Dustan <DustanGro... at gmail.com>
> > escribi?:
>
> > >http://dustangroups.googlepages.com/privateattributesinpython
>
> > > This is something that I just threw together this morning, after a
> > > eureka moment. It's a way of creating private class attributes and
> > > static function variables (I'm not 100% sure if that's the correct
> > > terminology, but you get what I mean). I haven't tried to create
> > > private instance attributes, mainly because it would just be too
> > > difficult, and it would be awful syntax. I'm not considering actually
> > > using this, but I do have a couple questions about it.
>
> > I feel so dumb, but I can't see how to use it, or what's for. Perhaps an
> > example?
>
> > --
> > Gabriel Genellina
>
> There are two examples - one demonstrating static function variables
> and one demonstrating private class attributes. Both perform some kind
> of counting. The function returns how many times it's been called.
> Here it is:
>
> @PrivateDataEngine(numCalls = 0)
> def testPrivateStaticFunctionVariables(internalData):
>     """returns the number of times this function has been called."""
>     internalData.numCalls += 1
>     return internalData.numCalls
>
> There's a comment explaining how the decorator works on the page I
> linked you to.
>
> A common pythonic workaround for this is something like this:
>
> def testMutableDefaultArgs(_cache = {'internalData':0}):
>     """returns the number of times this function has been called."""
>     _cache['internalData'] += 1
>     return _cache['internalData']
>
> The default argument only gets evaluated once, and since it's mutable
> and being modified in the function, it magically becomes
> {'internalData':1} after 1 call and {'internalData':1348372} after
> 1348372 calls.
>
> The other example, explaining private class attributes, has a method
> getNumInstances that returns how many instances have been created.
> Here that is:
>
> class TestPrivateClassAttributes(object):
>     # pca here obviously stands for Private Class Attributes.
>     pcaManager = PrivateDataEngine(numInstances = 0)
>
>     # Notice that the internal data is an implicit parameter that
> comes first,
>     # even before the self parameter.
>     @pcaManager
>     def __init__(internalData, self):
>         internalData.numInstances += 1
>
>     @staticmethod
>     @pcaManager
>     def getNumInstances(internalData):
>         return internalData.numInstances
>
>     # Don't forget to delete the pcvManager, or it will have all been
> in vain.
>     del pcaManager
>
> I'm thinking this is going to look rather ugly when the text gets
> wrapped; that's why I linked to an external page in the first place.
>
> Notice it requires more advanced usage of the PrivateDataEngine if you
> want multiple functions to have access to the same data, as you
> normally would in a class.
>
> Note also that the double-decorated method getNumInstances requires
> that staticmethod be the first decorator. This is equivalent to the
> code "getNumInstances = staticmethod(pcaManager(getNumInstances))". I
> got an error when I tried it with pcaManager preceding staticmethod,
> so my educated guess is that staticmethods are somehow specially
> recognized by the class, and therefore they have to actually BE
> staticmethods, not dressed over by a pcaManager.
>
> Now that I think of it, for clarity, pcaManager may not have been a
> good name for the function returned by PrivateDataEngine; pcaDecorator
> would have been better, seeing as it IS a decorator. Perhaps I'll
> change that soon.
>
> The pythonic way would be:
>
> class TestPythonsPrivateClassAttributes(object):
>     _numInstances = 0
>
>     def __init__(self):
>         # class attributes can be accessed from self.
>         self.numInstances += 1
>
>     @staticmethod
>     def getNumInstances(internalData):
>         return self.numInstances
>
> It should immediately stick out as being much more concise
> syntactically, and therefore much less bug-prone.
>
> Obviously, these examples are a lot like "Hello, World!" in their
> usefulness; one would very rarely want to track how many times a
> function has been called.
>
> Hope that helps.

I forgot to note that the 'pythonic' ways are untested (and remain so,
as far as I know).



From rridge at caffeine.csclub.uwaterloo.ca  Tue Mar 20 14:02:33 2007
From: rridge at caffeine.csclub.uwaterloo.ca (Ross Ridge)
Date: Tue, 20 Mar 2007 14:02:33 -0400
Subject: Exceptions when closing a file
References: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
Message-ID: <etp7jo$vol$1@rumours.uwaterloo.ca>

Steven D'Aprano  <steve at REMOVE.THIS.cybersource.com.au> wrote:
>Closing a file can (I believe) raise an exception. Is that documented
>anywhere? 

In a catch-all statement for file objects: "When a file operation fails
for an I/O-related reason, the exception IOError is raised."  The fact
that close() is a file operation that might fail is revealed by "file
objects are implemented using C's stdio package" and the fact the C's
fclose() function can fail.

> Is IOError the only exception it can raise?

I assume it can raise the exceptions MemoryError and KeyboardInterupt,
which just about any Python operation can raise.

>Out of curiosity, is there a simple way to demonstrate close() raising an
>exception that doesn't involve messing about with disk quotas? 

Something like the following should work:

	f = file("/dev/null", "r")
	os.close(f.fileno)
	f.close()

Normally however, you can expect file method close() to fail for all
the same reasons you would expect write() to fail.

					Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge at csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //	  


From sjdevnull at yahoo.com  Thu Mar 15 02:20:20 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 14 Mar 2007 23:20:20 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <1huzlrm.1scmekr1val8sbN%aleax@mac.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<1huzlrm.1scmekr1val8sbN%aleax@mac.com>
Message-ID: <1173939619.968795.216370@y80g2000hsf.googlegroups.com>

Alex Martelli wrote:
> tereglow <tom.rectenwald at eglow.net> wrote:
>    ...
> > server using the /proc FS.  For example, in order to obtain the amount
> > of physical memory on the server, I would do the following in shell:
> >
> > grep ^MemTotal /proc/meminfo | awk '{print $2}'
>
> If you would indeed do that, maybe it's also worth learning something
> more about the capabilities of your "existing" tools, since
>
>   awk '/^MemTotal/ {print $2}' /proc/meminfo
>
> is a more compact and faster way to perform exactly the same task.


That's correct on small files, but note that at least on my platform
(Linux, GNU grep and awk), "grep" is just massively insanely faster
than awk (to the point where doing the equivalent on /usr/share/dict/
words takes 10-20% of the time with "grep re|awk..." as it does with
"awk '/re...'"

On this small proc file, the plain-awk version is faster (and it's
cleaner looking), as Alex points out.

But for large files, "grep" is often _way_ faster than awk/perl/python/
whatever alternative, easily swamping the fork/exec cost.  It's often
quite handy to keep that in mind.



From laurent.pointal at wanadoo.fr  Wed Mar  7 13:21:57 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Wed, 07 Mar 2007 19:21:57 +0100
Subject: Generator expression parenthesis mixed with function call ones
References: <esmn5q$5ni$1@news2.u-psud.fr>
	<mailman.4757.1173284624.32031.python-list@python.org>
Message-ID: <45ef01c7$0$5085$ba4acef3@news.orange.fr>

Gabriel Genellina wrote:

> En Wed, 07 Mar 2007 12:53:43 -0300, Laurent Pointal
> <laurent.pointal at limsi.fr> escribi?:
> 
>>>>> f(4,i for i in range(10))
>>   File "<stdin>", line 1
>> SyntaxError: invalid syntax
> 
> 2.5 has a better error message:
> py> f(4,i for i in range(10))
>    File "<stdin>", line 1
> SyntaxError: Generator expression must be parenthesized if not sole
> argument
> 
>> Why does Python allow generator expression parenthesis to be mixed with
>> function call parenthesis when there is only one parameter ?
> 
> Because they are redundant when only one argument is used.
> sum(i for i in range(10)) looks better than sum((i for i in range(10)))
> "Beautiful is better than ugly", and "Readability counts."

I complement my reply.

Beginners generally know about list-comprehensions and associate the
syntax "x for x in asequence" to a list expression. I'm not sure that
reading a "f(i for i in range(20))" they understand that they are dealing
with a different object kind.

If function f start by a if len(myparameter)...
  TypeError: len() of unsized object

If function f goes among its parameter with "for x in myparameter" more than
once, other loops goes throught an empty loop.

>> IMHO this should be forbidden, usage must not be different when there is
>> only one parameter and when there are more parameters.
> 
> It's similar to "%d" % 123 vs. "%d" % (123,)
> """Special cases aren't special enough to break the rules.
> Although practicality beats purity."""

In that case there cannot be confusion.

A+

Laurent.



From mail at microcorp.co.za  Tue Mar 20 01:46:55 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 20 Mar 2007 07:46:55 +0200
Subject: Real Time Embedded Systems Monitor in Python?
References: <1174310562.286168.74350@y80g2000hsf.googlegroups.com>
Message-ID: <000201c76ab8$32ad66a0$03000080@hendrik>


"frikk" <frikker at gmail.com> wrote:
> 
> I am looking into a project for the company I work for.  Essentially
> it involves setting up a real time monitor / signal injector in
> between a CPU board and a system controller.  The system controller
> sends signals (message packets) to the CPU board.  We would like to
> create an environment where we can modify signals, inject new
> messages, drop signals, etc.  This would simulate communication
> failures and message dropouts to see how the CPU board responds.  The
> application monitor would use a COM port to send and receive
> messages.  The most important part about this monitor is that
> absolutely no messages get delayed or dropped due to inturrupts or lag
> on the PC that the monitor is running on. What would be the expected
> sampling time range that I could expect to handle?

What speed is the serial port running at?   I have run a port at 115200 Baud
(albeit not carrying back to back packets), on a pentium II running Linux.

If you are not trying to do something insane like a Fast Fourier Transform in
real time, then Python should do the job for you - I would suggest you just
try it, starting with the smallest subset of commands - should take no longer 
than about a week to get a prototype running.

When you say "in between" do you mean in one port and out of another?
So that you have to handle an upstream and downstream serial port?

The sampling time range will be directly (more or less, given some spillage
for turn around times) related to the baud rate, unless its a sort of sliding 
window full duplex protocol.   (I assume there is some sort of error
detection and recovery scheme - these normally waste about 10% of the 
available bandwidth)

> 
> I have seen similar applications written for other projects that we
> have which were done in Visual Basic. I assume that if VB is up to the
> task, Python should be as well.  What kind of libraries am I looking
> at? I will probably use wxWindows, but what about for the serial ports
> and packet timing?

Start off with a basic character interface, and use the serial module,
solving the protocol hassles first.
You can add the pretty pictures afterwards.

hth - Hendrik




From esj at harvee.org  Thu Mar 22 11:58:44 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Thu, 22 Mar 2007 11:58:44 -0400
Subject: fine grain logging cotrol
In-Reply-To: <etu19j$nqi$03$1@news.t-online.com>
References: <mailman.5451.1174567188.32031.python-list@python.org>
	<etu19j$nqi$03$1@news.t-online.com>
Message-ID: <etu93m$ae0$1@sea.gmane.org>

Peter Otten wrote:
> Eric S. Johansson wrote:
> 
>> I need to to be able to conditionally log based on the method the log
>> statement is in and one other factor like a log level.  in order to do
>> so, I need to be able to automatically find out the name of the method
>> and its class but I haven't found out how to do that yet.
>>
>> for example,
>>
>> class catus(Felis):
>>    def Siamese_cat( yowl, purr, demand_food):
>>
>>      ...
>>      log("state of litter box %s"% litter_box.smell, level = 1)
>>
>>
>> If the table of methods logged contains "catus.Siamese_cat", then I
>> would expect to see the output of the log statements in a log file.  If
>> not then I wouldn't see anything in the log.
>>
>> Has somebody done this already?  Is it even possible to do without
>> manually adding the class and method information for every log statement?
>>
>> a related question is using signals for reloading configurations etc.  I
>> have to find any good examples of how to use signals to cause a
>> long-running process to reload external data.  Any good pointers?
> 
> Instead of rolling your own, use the logging package which can handle
> everything but the class info out of the box (levels are spelt as method
> names info(), warn() etc.).

I was planning on using logging.  I've been using syslog for too long
> 
> import logging
> 
> class LoggedType(type):
>     def __new__(mcl, name, bases, classdict):
>         classdict["logger"] = logging.getLogger(name)
>         return type.__new__(mcl, name, bases, classdict)

__new__ is new to me.  took a look at 
http://www.python.org/download/releases/2.2.3/descrintro/#__new__ which 
give me some clue but not enough.  what I get is that in call 
initialization, you add an entry to the class dict (adds new method??). 
I see that name, bases, or classdict are part of the normal class 
construction process and refer to the class under construction.  I'm 
guessing mcl comes from __metaclass__ and defaults to type?

the getLogger creates a logging channel so there is one channel per 
class?  but what selects the class for output or is that a derived 
logger class I need to create?

also, how could one automatically determine the method doing the logging?

> 
> class Felis:
>     __metaclass__ = LoggedType

needed in every top level class?

>     def alpha(self):
>         self.logger.info("felis-alpha")
> 
> class Catus(Felis):
>     def alpha(self):
>         self.logger.info("catus-alpha")
>     def beta(self):
>         self.logger.info("catus-beta")
> 
> if __name__ == "__main__":
>     logging.basicConfig(format="%(name)s.%(funcName)s: %(message)s",
> level=logging.INFO)
>     f = Felis()
>     f.alpha()
>     c = Catus()
>     c.alpha()
>     c.beta()


> 
> If the metaclass bothers you, here's a simpler alternative:

simpler to implement but more error prone.  I like the metaclass model. 
  now if one could fill in the class and method name automatically, life 
would be good.



From dickinsm at gmail.com  Sun Mar 11 12:37:32 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 09:37:32 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <mailman.4944.1173629658.32031.python-list@python.org>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
Message-ID: <1173631052.614449.51370@h3g2000cwc.googlegroups.com>

On Mar 11, 12:13 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "Dan Bishop" <danb... at yahoo.com> wrote in message
>
> news:1173629090.993914.55570 at 30g2000cwc.googlegroups.com...
> | On Mar 11, 9:31 am, "Mark Dickinson" <dicki... at gmail.com> wrote:
> | > I get the following behaviour on Python 2.5 (OS X 10.4.8 on PowerPC,
> | > in case it's relevant.)
> | >
> | > >>> x, y = 0.0, -0.0
> | > >>> x, y
> | > (0.0, 0.0)
> | > >>> x, y = -0.0, 0.0
> | > >>> x, y
> | >
> | > (-0.0, -0.0)
> || IIRC, float.__repr__ just does whatever libc does.  Have you tried
> | using printf("%g, %g", 0.0, -0.0) in a C program?
>
> Detailed FP behavior like this is system (and yes, libc) dependent.  On
> WinXP
> IDLE 1.1.3>>> x,y = 0.0, -0.0
> >>> x,y
> (0.0, 0.0)
> >>> x,y = -0.0, 0.0
> >>> x,y
> (0.0, 0.0)
> >>> -0.0
>
> 0.0
>
> Terry Jan Reedy

Interesting.  So on Windows there's probably no hope of what I want to
do working.
But on a platform where the C library does the right thing with signed
zeros, this
behaviour is still a little surprising.  I guess what's happening is
that there's
some optimization that avoids creating two separate float objects for
a float literal
that appears twice, and that optimization doesn't see the difference
between 0. and -0.

>>> x, y = 0., -0.
>>> id(x) == id(y)
True

jim-on-linux's solution works in the interpreter, but not in a script,
presumably because we've got file-wide optimization rather than
line-by-line optimization.

#test.py
x = -0.0
y = 0.0
print x, y
#end test.py

>>> import test
-0.0 -0.0

Mark



From moonquelle at gmail.com  Fri Mar 16 12:52:22 2007
From: moonquelle at gmail.com (=?UTF-8?Q?P=C4=B1nar_Yanarda=C4=9F?=)
Date: Fri, 16 Mar 2007 18:52:22 +0200
Subject: looking for a simple crypto library
In-Reply-To: <OBfKh.74847$Ju2.51310@newsfe16.lga>
References: <mailman.5125.1173940891.32031.python-list@python.org>
	<7xfy86qxuv.fsf@ruckus.brouhaha.com>
	<OBfKh.74847$Ju2.51310@newsfe16.lga>
Message-ID: <c5dbda760703160952o4902cd46pb08615c9022dd84@mail.gmail.com>

yep, thanx a lot ;)

2007/3/15, hg <hg at nospam.org>:
>
> Paul Rubin wrote:
>
> > tlslite
>
> cool !
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
P?nar "pinguar" Yanarda?
http://pinguar.org
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From lbates at websafe.com  Mon Mar 12 10:22:25 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 12 Mar 2007 09:22:25 -0500
Subject: PIL: reading bytes from Image
In-Reply-To: <1173629243.214806.220070@s48g2000cws.googlegroups.com>
References: <1173568560.648691.61760@64g2000cwx.googlegroups.com>
	<mailman.4925.1173573914.32031.python-list@python.org>
	<1173629243.214806.220070@s48g2000cws.googlegroups.com>
Message-ID: <dPKdnYmt876B_2jYnZ2dnUVZ_vjinZ2d@comcast.com>

cyberco wrote:
> Thanks,
> 
> I've tried the StringIO option as follows:
> 
> =================================
> img = Image.open('/some/path/img.jpg')
> img.thumbnail((640,480))
> file = StringIO, StringIO()
> img.save(file, 'JPEG')
> 
> =================================
> 
> But it gives me:
> 
> =================================
> 
> exceptions.TypeError                                 Traceback (most
> recent call last)
> 
> C:\Python24\lib\site-packages\PIL\Image.py in save(self, fp, format,
> **params)
>    1303
>    1304         try:
> -> 1305             save_handler(self, fp, filename)
>    1306         finally:
>    1307             # do what we can to clean up
> 
> C:\Python24\lib\site-packages\PIL\JpegImagePlugin.py in _save(im, fp,
> filename)
>     407         )
>     408
> --> 409     ImageFile._save(im, fp, [("jpeg", (0,0)+im.size, 0,
> rawmode)])
>     410
>     411 def _save_cjpeg(im, fp, filename):
> 
> C:\Python24\lib\site-packages\PIL\ImageFile.py in _save(im, fp, tile)
>     464     bufsize = max(MAXBLOCK, im.size[0] * 4) # see RawEncode.c
>     465     try:
> --> 466         fh = fp.fileno()
>     467         fp.flush()
>     468     except AttributeError:
> 
> TypeError: descriptor 'fileno' of 'file' object needs an argument
> =================================
> 
> It looks similar to the code in Sparklines except for the fact that
> the latter creates an Image from scratch.
> 
> 2B
> 
>> Saving the image, in a
>> format your client understands, to a file like object like
>> StringIO.StringIO is an easy path to take.
>>
>> Sparklines shows this in action:
>>
>> http://bitworking.org/projects/sparklines/
>>
>> max
> 
> 
If it hasn't already bitten you it will: It is a BAD idea to use
'file' as a variable name.  If you do, you mask the built-in file
function.  That is why most people use fp or something else.

-Larry


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar 26 20:49:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 27 Mar 2007 02:49:05 +0200
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174925704.394888.18170@d57g2000hsg.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
	<1174854156.298431.68150@n59g2000hsh.googlegroups.com>
	<XcOdnTRJmdpteZvbnZ2dnUVZ_qSrnZ2d@comcast.com>
	<1174925704.394888.18170@d57g2000hsg.googlegroups.com>
Message-ID: <4608615b$0$444$426a74cc@news.free.fr>

7stud a ?crit :
> On Mar 25, 3:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> 
>>Here's another way of looking at it::
>>
>>     >>> class Test(object):
>>     ...     pass
>>     ...
>>     >>> def greet():
>>     ...     print 'Hello'
>>     ...
>>
>>>>Test.greet = greet
>>>>Test.greet
>>
>>  <unbound method Test.greet>
> 
> 
> Interesting.  After playing around with that example a bit and finally
> thinking I understood bound v. unbound, I found what appears to be an
> anomaly:
> ------------
> class Test(object):
>         pass
> 
> def greet(x):
>         print "hello"
> 
> Test.func = greet
> print Test.func
> 
> t = Test()
> print t.func
> 
> def sayBye(x):
>         print "bye"
> 
> t.bye = sayBye
> print t.bye
> ------------output:
> <unbound method Test.greet>
> <bound method Test.greet of <__main__.Test object at 0x6dc50>>
> <function sayBye at 0x624b0>
> 
> Why doesn't t.bye cause a method object to be created?
> 

(technical answer - I leave to some guru the care to explain the 
motivations for this behaviour)

Because t.bye is an attribute of instance t, not of class Test. A 
descriptor object has to be a class attribute for the descriptor 
protocol to be invoked.


Note that you can override __getattribute__ to change this - but this is 
somewhat hackish, and will probably slow down things quite a bit.

FWIW, if you want to dynamically add a method to an instance:
   inst.method = func.__get__(inst, inst.__class__)



From f.braennstroem at gmx.de  Thu Mar 29 14:03:28 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Thu, 29 Mar 2007 18:03:28 +0000
Subject: pattern search
In-Reply-To: <1175023173.010583.69100@o5g2000hsb.googlegroups.com>
References: <mailman.5671.1175008459.32031.python-list@python.org>	<eubdj4$meh$1@atlantis.news.tpi.pl>	<mailman.5679.1175019068.32031.python-list@python.org>
	<1175023173.010583.69100@o5g2000hsb.googlegroups.com>
Message-ID: <eugnqd$d49$1@sea.gmane.org>

Hi Paul,

Paul McGuire schrieb am 03/27/2007 07:19 PM:
> On Mar 27, 3:13 pm, Fabian Braennstroem <f.braennstr... at gmx.de> wrote:
>> Hi to all,
>>
>> Wojciech Mu?a schrieb am 03/27/2007 03:34 PM:
>>
>>> Fabian Braennstroem wrote:
>>>> Now, I would like to improve it by searching for different 'real'
>>>> patterns just like using 'ls' in bash. E.g. the entry
>>>> 'car*.pdf' should select all pdf files with a beginning 'car'.
>>>> Does anyone have an idea, how to do it?
>>> Use module glob.
>> Thanks for your help! glob works pretty good, except that I just
>> deleted all my lastet pdf files :-(
>>
>> Greetings!
>> Fabian
> 
> Then I shudder to think what might have happened if you had used
> re's! :)

A different feature it had was to copy the whole home-partition
(about 19G) into one of its own directories ... the strange thing:
it just needed seconds to do that and I did not have the permission
to all files and directories! It was pretty strange! Hopefully it
was no security bug in python...

Greetings!
Fabian



From paul.smith at catugmt.com  Tue Mar 20 23:44:40 2007
From: paul.smith at catugmt.com (Paul Smith)
Date: Wed, 21 Mar 2007 03:44:40 +0000 (UTC)
Subject: Can sqlite read gzipped databases?
Message-ID: <loom.20070321T042105-571@post.gmane.org>

Hi,

I'd like to read a series of sqlite database files that have already been 
gzipped and was wondering if this can be done on the fly. In other words, can 
I avoid explicitly unzipping the file into another file, but instead get an 
SQL connection to the zip file either directly (can't see an option to do 
this) or to an object in memory resulting from unzipping, eg. (hypothetically);

import gzip
from sqlite3 import dbapi2 as sqlite

data = gzip.GzipFile('Mydbase.db.gz','r')
d = data.read()
cnx = sqlite.connect(d) # or .connect(data)
cur = cnx.cursor()
....etc

The above of course doesn't work, but just to give you the idea.

Thanks,
Paul




From lbates at websafe.com  Fri Mar  9 12:56:50 2007
From: lbates at websafe.com (Larry Bates)
Date: Fri, 09 Mar 2007 11:56:50 -0600
Subject: about application deployment
In-Reply-To: <mailman.4860.1173456688.32031.python-list@python.org>
References: <mailman.4860.1173456688.32031.python-list@python.org>
Message-ID: <dvidnTuw8ehOAmzYnZ2dnUVZ_qDinZ2d@comcast.com>

Alessandro de Manzano wrote:
> Hello,
> 
> I'ld ask you all about deployment of python applications.
> 
> Sometimes (if not most times..) I would make deployment easy (easier)
> for my customers (and for me too...)
> 
> What I mean, would be very useful to have a "jar-like" archive/single
> file / multiple platform in order to deploy also complex applications
> with many modules.
> 
> I know about "py2exe", it's nice but it's Windows only, I would need
> something multiplatform or at least available also for other platforms
> (*nix, Mac maybe, ...)
> 
> My impression is that Python is a great language but a bit "messy"
> about on field deployment...
> 
> What am I missing ? :)
> What are your experiences (and solutions ?) for this issues ?
> 
> Many thanks in advance!
> 
> 
> bye!
> 
> Ale
> 
I think you are going to find that you need different deployment
methods for different operating systems.  When you deploy you will
no doubt have different things to do (shortcuts, registry entries,
.INI file entries, etc.) that you want to do.

On Windows my choice is py2exe to bundle and then Inno Installer
to make a setup.exe distrubution program that handles the install
and uninstall.  Others can chime in on linux, mac, etc.

-Larry


From aahz at pythoncraft.com  Sun Mar  4 13:04:03 2007
From: aahz at pythoncraft.com (Aahz)
Date: 4 Mar 2007 10:04:03 -0800
Subject: Non Sequitur
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172979629.812957.156820@i80g2000cwc.googlegroups.com>
	<_ftGh.8984$tD2.396@newsread1.news.pas.earthlink.net>
	<mailman.4640.1172990278.32031.python-list@python.org>
Message-ID: <esf1mj$6b5$1@panix3.panix.com>

In article <mailman.4640.1172990278.32031.python-list at python.org>,
Ben Finney  <bignose+hates-spam at benfinney.id.au> wrote:
>Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
>>
>> """
>> 	I before E
>> 		Except after C
>> 	Or when sounded as A
>> 		As in Neighbor and Weigh
>> """
>
>Yes, like the "A" sound in "weird" or "ceiling".

http://jef.raskincenter.org/published/i_before_e.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From JHoover at fbi.gov  Sun Mar 11 15:36:07 2007
From: JHoover at fbi.gov (Gordon Airporte)
Date: Sun, 11 Mar 2007 15:36:07 -0400
Subject: Watching a file another app is writing
Message-ID: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>

I'm trying to find a way to take a file that another program has opened 
and writes to periodically, open it simultaneously in Python, and 
automatically update some of my objects in Python when the file is 
written to.
I can open the file and manually readlines() from it to keep up to date, 
it's the automatic part I'm having trouble with. This is on Windows.


From __peter__ at web.de  Wed Mar 28 03:09:23 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Mar 2007 09:09:23 +0200
Subject: PyDoc -g call to Alt-Installed Python
References: <1175045954.295216.105830@d57g2000hsg.googlegroups.com>
Message-ID: <eud4b9$cdp$03$1@news.t-online.com>

D.Hering wrote:

> I have both python2.4 and 2.5 installed on a (k)ubuntu linux box. I'm
> trying to get the call to pydoc -g (pydoc server called from the
> system console) to recognize python2.5 rather than the system's
> default 2.4 release.
> 
> I've tried several different things so far, to no avail. My console
> scripting knowledge, so far, is minimal. Any help here is appreciated.

Copy Tools/scripts/pydoc from the Python2.5 source distribution into ~/bin.
Then change its first line from 

#!/usr/bin/env python 

to

#!/usr/bin/env python2.5

Peter



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 05:47:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 07:47:29 -0300
Subject: Pb with descriptor and super ...
References: <esr95l$n12$1@ellebore.extra.cea.fr>
Message-ID: <op.tow39fuax6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 06:25:08 -0300, Erwan Adam <erwan.adam at cea.fr>  
escribi?:

> I have a problem with the use of descriptors
> and super. The file is :

Descriptors for "super" behave a bit different than for classes. See
http://www.python.org/2.2/descrintro.html#cooperation

-- 
Gabriel Genellina



From arnodel at googlemail.com  Thu Mar  1 06:26:28 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 1 Mar 2007 03:26:28 -0800
Subject: class declaration shortcut
In-Reply-To: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
Message-ID: <1172748388.475530.57570@k78g2000cwa.googlegroups.com>

On Feb 28, 7:26 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
> I've come across a code snippet inwww.rubyclr.comwhere they show how
> easy it is to declare a class compared to equivalent code in c#.
> I wonder if there is any way to emulate this in Python.
>
> The code is as follows:
>
> Person = struct.new( :name, :birthday, :children)
>
> I tried something like this, but it's nothing close to what I'd like:
>
> def klass(table, *args):
>         cls = new.classobj(table, (), {})
>         for i in args:
>                 setattr(cls, i, i)
>         return cls
>
> But this above is not what I want.
> I guess I should find a way to include the constructor code inside
> this function, but I don't know if this is possible.
> Also, I wonder if there is a way to use the variable name in order to
> create a class with the same name (as in "Person"above).
>
> Well, if anyone has an idea, I'd like to know...
>
> Luis

Perhaps something like:

class Struct(object):
    def __init__(self, **vals):
        for slot, val in vals.iteritems():
            setattr(self, slot, val)
    def __repr__(self):
        return "%s(%s)" % (type(self).__name__,
            ", ".join("%s=%s" % (slot, repr(getattr(self, slot))) for
slot in self.__slots__ if hasattr(self, slot)))

def new_struct(name, *slots):
    return type(name, (Struct,), {'__slots__': slots})


Then you can do:

>>> Point = new_struct('Point', 'x', 'y')
>>> p=Point(x=1, y=2)
>>> p
Point(x=1, y=2)
>>> p.x
1
>>> p.y
2
>>> p.x=7
>>> p
Point(x=7, y=2)
>>> Person = new_struct('Person', 'name', 'tel', 'email')
>>> jack = Person(name='Jack')
>>> jack
Person(name='Jack')
>>> jack.tel='555-132'
>>> jack
Person(name='Jack', tel='555-132')
>>>

etc...

Of course that's if you want a c-like struct. Otherwise there's not
much point at all!

--
Arnaud




From paul at boddie.org.uk  Tue Mar 13 07:57:26 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 13 Mar 2007 04:57:26 -0700
Subject: converting epoch time to string (and vice versa)
In-Reply-To: <mailman.5000.1173765131.32031.python-list@python.org>
References: <45F639AA.1040209@al.com.au>
	<mailman.5000.1173765131.32031.python-list@python.org>
Message-ID: <1173787046.194632.220030@p10g2000cwp.googlegroups.com>

On 13 Mar, 06:52, "Amit Khemka" <khemkaa... at gmail.com> wrote:
> On 3/13/07, Astan Chee <s... at al.com.au> wrote:
>
> > I have a string in this format "DD/MM/YYY" for example:
> > tdate = "18/01/1990"
> > and Im trying to convert this to epoch time, can anyone help?
>
> import calendar
> t = map(int,tdate.split('/'))
> epochs = calendar.timegm((t[2], t[1], t[0], 0, 0, 0))

You can also use strptime:

import time
t = time.strptime("18/01/1990", "%d/%m/%Y")
epochs = calendar.timegm(t)

Whilst timegm is a hidden gem in the calendar module, it is actually
based on a library function on certain platforms. I've submitted a
patch to add a platform-independent version to the time module -
requests to add such a function previously led only to documentation
changes, I believe. (I think that many people regard mktime as doing
the work that only timegm actually accomplishes, so it's an important
addition.)

> > Im also trying to convert that epoch time to the string format
> > previously. Can anyone help this one too?
>
> import time
> time.ctime(epochs)

Note that ctime makes a string in a particular format (not the
original one, though) from the local time. It might be better to use
strftime instead:

import time
time.strftime("%d/%m/%Y", epochs)

Paul



From gagsl-py2 at yahoo.com.ar  Tue Mar 20 06:18:58 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 07:18:58 -0300
Subject: Create TarFile using string buffers
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
	<mailman.5305.1174342750.32031.python-list@python.org>
	<1174352130.385944.163960@e1g2000hsg.googlegroups.com>
Message-ID: <op.tphf9w2ix6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Mon, 19 Mar 2007 21:55:30 -0300, aurora00 at gmail.com  
<aurora00 at gmail.com> escribi?:

> Thanks. It almost works. The problem is I don't know the size of the
> file until it has finished streaming. It looks like the tar file
> format need the file size written at the beginning :(

Yes, maybe because it's originally a tape format. Anyway it could be done;  
addfile() could seek back to the header and patch it after the file size  
is known...

-- 
Gabriel Genellina



From nagle at animats.com  Mon Mar  5 13:00:10 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 05 Mar 2007 18:00:10 GMT
Subject: Mod python - mysql lock
In-Reply-To: <45ebe618$1@griseus.its.uu.se>
References: <1173086638.769972.254300@t69g2000cwt.googlegroups.com>
	<45ebe618$1@griseus.its.uu.se>
Message-ID: <KUYGh.7208$re4.7038@newssvr12.news.prodigy.net>

    If you use MySQL 5, you get atomic transactions.  The old
"LOCK" thing is becoming obsolete.  Suggest getting a newer
MySQL and a newer MySQL book.

				John Nagle

Jan Danielsson wrote:
> Roopesh wrote:
> 
>>In my mod_python project I am using mysql as the database. There is
>>table card in which unique cards are stored. When a user request comes
>>he has to get a unique card. In this situation I want to use LOCK with
>>which I can prevent other users accessing the table. I tried excuting
>>"LOCK" command of mysql through python code, but it is not locking the
>>database. Any ideas why this isn't working and how can I do the same.
>>
>>//python code
>>sql = "LOCK TABLES card WRITE"
>>cursor.execute(sql)


From gagsl-py2 at yahoo.com.ar  Sun Mar 25 16:54:41 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 17:54:41 -0300
Subject: functions, classes, bound, unbound?
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
	<1174854156.298431.68150@n59g2000hsh.googlegroups.com>
Message-ID: <op.tpri1fepx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 17:22:36 -0300, 7stud <bbxx789_05ss at yahoo.com>  
escribi?:

> On Mar 25, 3:00 am, irs... at gmail.com wrote:
>> On Mar 25, 9:13 am, "7stud" <bbxx789_0... at yahoo.com> wrote:
>>
>> > Is there some other way to retrieve a user-defined function object
>> > from a class other than using the class name or an instance?
>>
>> What Steven B. already said, MyClass.__dict__['someFunc'], is a
>> different way than MyClass.someFunc that produces different results.
>
> methObj = Test.__dict__["greet"]
> print methObj.im_self
>
> Traceback (most recent call last):
>   File "test1.py", line 7, in ?
>     print methObj.im_self
> AttributeError: 'function' object has no attribute 'im_self'

Because this way, you get a function, not a method. I'd say "read  
something about descriptors" but...

Nicolas Bourbaki [a collective of french mathematicians writing under that  
alias] said on a book about set theory: Any school boy can understand all  
of this with a minimum of effort, but for truly understanding what we are  
talking about, around four years of prior training on mathematics may be  
required. (I can't find the exact citation).

I suggest first learn to use Python and then try to understand how it does  
what it does, along the way, and looking for answers when you have a  
question.

-- 
Gabriel Genellina



From sigzero at gmail.com  Sat Mar 24 14:46:55 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 24 Mar 2007 11:46:55 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <mailman.5555.1174759784.32031.python-list@python.org>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5555.1174759784.32031.python-list@python.org>
Message-ID: <1174762014.848731.320520@n76g2000hsh.googlegroups.com>

On Mar 24, 2:09 pm, "Greg Donald" <gdon... at gmail.com> wrote:
> On 24 Mar 2007 10:30:28 -0700, Robert Hicks <sigz... at gmail.com> wrote:
>
> > I want to upgrade to 2.5 but I don't see any unistall instructions
> > anywhere.
>
> You're not required to remove the old version before installing the new version.
>
> Just install the new version somewhere like /usr/local and put
> /usr/local/bin ahead of your other paths.
>
> --
> Greg Donaldhttp://destiney.com/

That is exactly what I did. I don't touch the Apple supplied version.
Now I want to put that latest Python on.

Robert




From troy.melhase at gmail.com  Sun Mar  4 06:08:08 2007
From: troy.melhase at gmail.com (Troy Melhase)
Date: Sun, 4 Mar 2007 02:08:08 -0900
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
Message-ID: <d50f6c8a0703040308o7ddb5751u5a28e3e0464a4e84@mail.gmail.com>

[snip]

> So what's going on?  We've run into a conflict between an assumption of Python
> and of the Plesk control panel.  Plesk doesn't let the user create files
> in their own home directory.  This installer assumes it can.  Oops.
> (Plesk sets up a very locked down environment, which is a good thing on
> a web server.)

The "installer" used the options you gave it, or its defaults in their absence.

> Now it turns out that we have Python 2.4 in /usr/bin, and Python 2.5
> in /usr/local/bin.  That's where the installer put it.  So the CGI
> scripts are invoking the wrong version of Python.  The scripts had to
> be changed.

You could have fixed this with "./configure --prefix=/usr/local"

> This kind of nonsense is why hosting companies don't want to support Python.
> Perl and PHP may be dumb, but they just work.  Java has a company behind it.
> Python just isn't ready.  Which is embarassing, ten years on.

Let's see...

You're trying to install a package without using the package
management tools provided by your system, you haven't read the docs
(or at least all of them), you show a general lack of understanding of
the different responsibilities in the free/open source software space
(development vs. packaging)... and after all that, then you come here
and complain?

Look, I'm sure lots of folks here would be glad to help you, but your
post comes across as whiny and confrontational.  I'm sure you've had a
frustrating experience, but please, don't blame "python" or "the
python developers", because that blame would be misplaced.


From duncan.booth at invalid.invalid  Mon Mar 19 04:50:15 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 Mar 2007 08:50:15 GMT
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
Message-ID: <Xns98F859E7ECA07duncanbooth@127.0.0.1>

"momobear" <wgwigw at gmail.com> wrote:

> in C++ language we must initilized a variable first, so there is no
> such problem, but in python if we don't invoke a.boil(), we will not
> get self.temp to be initilized, any way to determine if it's initilzed
> before self.temp be used.
> 
The simplest thing is simply never to attempt to use a variable or an 
attribute until you know that is has been initialized, so initialize all 
variables before using them, and initialize all attributes in the class's 
__init__ method.

If you don't have a suitable value for the attribute until later then just 
start off with None and then you can check for 'a.boil is not None': if you 
forget to check then Python's strong type checking will stop you from using 
the None value in an expression expecting a number (or a string). 

For cases where you aren't sure whether an object has a specific attribute 
you can use getattr with 3 arguments:

   if getattr(a, 'boil', 80):
       ...

If that isn't convenient (or it's a variable rather than an attribute) you 
should fall back on the principle that 'is it better to ask forgiveness  
than permission': i.e. just try to use the value and handle the exception 
which is thrown if it doesn't exist. (If the fallback is to substitute a 
simple value use getattr, if the fallback is complicated or takes a long 
time to calculate use exception handling).

There is also a function 'hasattr' which will tell you whether or not the 
object has the specified attribute, but internally it just calls 'getattr' 
and handles the exception so (IMHO) it is generally best just not to bother 
with 'hasattr'.


From hollandlucas at gmail.com  Sat Mar 24 11:19:06 2007
From: hollandlucas at gmail.com (hollandlucas at gmail.com)
Date: 24 Mar 2007 08:19:06 -0700
Subject: Problem with game
Message-ID: <1174749546.133947.232800@y80g2000hsf.googlegroups.com>

Hello,

the following script (it's in German):

import random
print "Wie oft wollen Sie spielen?"
anzahl_spiele = input()
games = 0
while games < anzahl_spiele:
	games += 1
	print "Raten sie die Zahl, die vom Computer generiert wird!"
	random_number = random.randint(1, 100)
	user_number = 0
	counter = 0
	while user_number != random_number:
  		user_number = input ("Zahl eingeben: ")
		counter += 1
   		if user_number < random_number:
       		print "Die eingegebene Zahl ist kleiner als die generierte
Zahl."
   		elif user_number > random_number:
      		print "Die eingegebene Zahl ist groesser als die generierte
Zahl."
print "Sie haben gewonnen!"
print counter

yields the following error when run:

 File "Python-episode12-Zahlenraten.py", line 15
    print "Die eingegebene Zahl ist kleiner als die generierte Zahl."



From carl.douglas at gmail.com  Tue Mar 20 23:08:32 2007
From: carl.douglas at gmail.com (Carl Douglas)
Date: Wed, 21 Mar 2007 14:08:32 +1100
Subject: [Swig-user] How to receive a FILE* from Python under MinGW?
In-Reply-To: <460078E1.7000905@student.unsw.edu.au>
References: <460078E1.7000905@student.unsw.edu.au>
Message-ID: <6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>

Hi John,

I had exactly this problem... use the PyFile_AsFile function.  Below
is a code snippet from my project:

		// Thank you:  http://www.ragestorm.net/tutorial?id=21#8
		PyObject* PyFileObject = PyFile_FromString(ofn.lpstrFile, "r");

		if (PyFileObject == NULL)
		{
			PyErr_Print();
			PyErr_Clear();
			return false;
		}

		// Because microsoft C runtimes are not binary compatible, we can't
		// just call fopen to get a FILE * and pass that FILE * to another application
		// or library (Python25.dll in this case) that uses a different version
		// of the C runtime that this DLL uses. Using PyFile_AsFile is a
work-around...

		if (PyRun_SimpleFile(PyFile_AsFile(PyFileObject), ofn.lpstrFile) == -1)
		{
			PyErr_Print();
			PyErr_Clear();
		}

		Py_DECREF(PyFileObject);

For the full source of my SWIG/Python project, poke around here:

http://l3dtpython.googlecode.com/svn/trunk/cdPython/

Hope that helps.

On 3/21/07, John Pye <john.pye at student.unsw.edu.au> wrote:
> Hi all
>
> There is fairly well-known problem on MinGW with passing FILE pointers
> to Python. The problem seems to be that Python depends on a different
> version of msvcrt*.dll to that which MinGW depends on, and these
> different C runtimes provide different FILE implementations.
>
> The upshot of that seems to be that file objects created in Python via
> the 'file(...)' command can't safely be used in a SWIG module. It can be
> done perfectly (using SWIG typemap and PyFile_AsFile) on Linux but it
> fails with a segfault on Windows.
>
> What is the best possible workaround for this? Surely someone must have
> found a satisfactory solution to this problem?
>
> Cheeers
> JP
>
> --
> John Pye
> Department of Mechanical and Manufacturing Engineering
> University of New South Wales, Sydney, Australia
> http://pye.dyndns.org/
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Swig-user mailing list
> Swig-user at lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/swig-user
>


From jon+usenet at unequivocal.co.uk  Sun Mar  4 05:29:16 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 4 Mar 2007 10:29:16 GMT
Subject: multiple content-types break cgi.py
References: <1173002603.690853.250090@p10g2000cwp.googlegroups.com>
Message-ID: <slrneul7rs.t3l.jon+usenet@snowy.squish.net>

In article <1173002603.690853.250090 at p10g2000cwp.googlegroups.com>, Janto Dreijer wrote:
> The Nokia Java SDK allows one to define multiple content-types in a
> single HTTP header field. I'm not sure if it's standard, but it's
> happening from some Java-enabled phones.
> 
> The only reference to this "bug" I can find dates back to 1999:
> http://tinyurl.com/3ahc3r

It's not a bug - sending multiple content-types is just totally broken.
What would such a header even be supposed to mean? It's like saying
"this is an apple orange".


From adam at atlas.st  Tue Mar  6 22:14:50 2007
From: adam at atlas.st (Adam Atlas)
Date: 6 Mar 2007 19:14:50 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
Message-ID: <1173237290.765293.261310@q40g2000cwq.googlegroups.com>

I updated it.
http://adamatlas.org/2007/03/Squisher-0.2.py

New Things:
- It supports C extensions within squished packages.
- It supports including squished packages within other squished
packages. (That is, you can have a package that includes a .pyc
generated by this, and turn that whole package into one .pyc.)
- If you import it after you import setuptools in a setup.py, it will
override a bit of setuptools so that bdist_egg will result in an egg
that can also be used as a squished package (if you rename it to
something ending in .pyc).
- It puts a helpful docstring at the top of generated .pyc files,
mainly for the purpose of being easy to see if you open the file in a
text editor. (It tells you what can be done with the file -- name it
something .pyc, or unzip it, or, if applicable, use it as an egg.)



From fsckedagain at gmail.com  Wed Mar 28 17:08:47 2007
From: fsckedagain at gmail.com (fscked)
Date: 28 Mar 2007 14:08:47 -0700
Subject: XML/encoding/prolog/python hell...
In-Reply-To: <1175105188.258960.191650@n59g2000hsh.googlegroups.com>
References: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
	<1175105188.258960.191650@n59g2000hsh.googlegroups.com>
Message-ID: <1175116127.774167.280350@y80g2000hsf.googlegroups.com>


kyosohma at gmail.com wrote:
<---SNIP--->
> I've never done this, but I found a recipe on the ActiveState website
> that looks like it would be helpful:
>
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/159100


I tried looking at that but couldn't figure out how to get the
property file working.


> I think you could modify it to make it work.
>
> You could probably also use a combination of the csv module and the
> pyxml module (links below).
>
> http://pyxml.sourceforge.net/topics/
> http://www.rexx.com/~dkuhlman/pyxmlfaq.html

These are a little too confusing for me. :)

> I also found a Python XML book: http://www.oreilly.com/catalog/pythonxml/chapter/ch01.html
>
> I hope that helps. I've started my own adventure into XML with XRC and
> wxPython.
>
> Mike



From tpartha at gmail.com  Fri Mar 23 01:03:26 2007
From: tpartha at gmail.com (PythonBiter)
Date: 22 Mar 2007 22:03:26 -0700
Subject: Need help to learn Python
Message-ID: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>

Hi everyone,

I'm very new in this Group as well Python language. I want to learn
Python. So could you please advice me, and guide me how can i become
master in Python !


Thanks,
Partha



From pyalbert at gmail.com  Thu Mar  8 09:42:48 2007
From: pyalbert at gmail.com (Ros)
Date: 8 Mar 2007 06:42:48 -0800
Subject: Writing xml file from MS SQL
Message-ID: <1173364968.605132.252770@s48g2000cws.googlegroups.com>

I am using pymssql for storing data into MS SQL. (I am using pymssql
first time so dont know much about it)
I wish to write/create XML file from database.
There are few examples available for mysql but not much information
about pymssql and MS SQL.

I have worked with cElementTree with SAX and I guess it can parse data
in the most efficient manner if you compare it with other parsers. How
can I use cElementTree to write xml file with the combination of
pymssql(MS SQL) and pyxml.

If you know any links, examples then please post them.

Regards,
Ros



From jgodoy at gmail.com  Wed Mar 14 17:10:21 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Wed, 14 Mar 2007 18:10:21 -0300
Subject: string formatting: engineering notation
References: <et9l3u$e57$1@ruby.cit.cornell.edu>
	<mailman.5113.1173906028.32031.python-list@python.org>
Message-ID: <87fy871qgy.fsf@gmail.com>

Steve Holden <steve at holdenweb.com> writes:

> Darren Dale wrote:
>> Does anyone know if it is possible to represent a number as a string with
>> engineering notation (like scientific notation, but with 10 raised to
>> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
>> decimal.Decimal class, but repeatedly instantiating Decimals is inefficient
>> for my application (matplotlib plotting library). If it is not currently
>> possible, do you think the python devs would be receptive to including
>> support for engineering notation in future releases?
>>
> How close is this:
>
>  >>> "%.3e" % 3.14159
> '3.142e+00'

>>> "%.3e" % 314159
'3.142e+05'
>>> 

Not close when you have the exponent.  



-- 
Jorge Godoy      <jgodoy at gmail.com>


From gagsl-py2 at yahoo.com.ar  Thu Mar  1 07:17:25 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Mar 2007 09:17:25 -0300
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
Message-ID: <op.toie3bjzx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 28 Feb 2007 18:27:43 -0300, <bayer.justin at googlemail.com> escribi?:

> Hi,
>
> I am trying to communicate with a subprocess via the subprocess
> module. Consider the following example:
>
>>>> from subprocess import Popen, PIPE
>>>> Popen("""python -c 'input("hey")'""", shell=True)
> <subprocess.Popen object at 0x729f0>
>>>> hey
>
> Here hey is immediately print to stdout of my interpreter, I did not
> type in the "hey". But I want to read from the output into a string,
> so I do
>
>>>> x = Popen("""python -c 'input("hey\n")'""", shell=True, stdout=PIPE,  
>>>> bufsize=2**10)
>>>> x.stdout.read(1)
> # blocks forever
Blocks, or is the child process waiting for you to input something in  
response?

> Is it possible to read to and write to the std streams of a
> subprocess? What am I doing wrong?

This works for me on Windows XP. Note that I'm using a tuple with  
arguments, and raw_input instead of input (just to avoid a traceback on  
stderr)

py> x=Popen(("python", "-c", "raw_input('hey')"), shell=True, stdout=PIPE)
py> x.stdout.read(1)
1234
'h'
py> x.stdout.read()
'ey'

I typed that 1234 (response to raw_input).

You may need to use python -u, or redirect stderr too, but what your real  
problem is?

-- 
Gabriel Genellina



From sjmachin at lexicon.net  Sat Mar 31 20:18:52 2007
From: sjmachin at lexicon.net (John Machin)
Date: 31 Mar 2007 17:18:52 -0700
Subject: help with dates
In-Reply-To: <1175377887.398372.246570@o5g2000hsb.googlegroups.com>
References: <1175376312.927559.10380@n76g2000hsh.googlegroups.com>
	<1175377887.398372.246570@o5g2000hsb.googlegroups.com>
Message-ID: <1175386732.325529.306700@p15g2000hsd.googlegroups.com>

On Apr 1, 7:51 am, "Pierre Quentel" <quentel.pie... at wanadoo.fr> wrote:
> > Four groups of firefighters (group1, group2, group3, group4). Each
> > group works a 24 hr shift. So group1 works April 1, group2 works April
> > 2, group3 works April 3, group4 works April 4, group 1 works April 5,
> > etc. It just keeps rolling like this forever into next year, etc.
>
> > I need to come up with a methodology for the following:
>
> > If given a date, find out what group is working on that date.
>
> Hello,
>
> You can use method datetime.date.toordinal() :
>
> from datetime import date
> start = date(2007,4,1) # Arpil 1, 2007
>
> def group(_date):
>     return (date.toordinal(_date)-date.toordinal(start)) % 4

... whose possible outcomes are (0, 1, 2, 3) whereas the groups are
numbered 1 to 4. However I'm sure the OP can make the necessary
adjustment :-)

>
> print group(date(2007,4,15))
>
> Regards,
> Pierre




From thatboatguy at gmail.com  Tue Mar 13 09:26:59 2007
From: thatboatguy at gmail.com (thatboatguy)
Date: 13 Mar 2007 06:26:59 -0700
Subject: maxho@maxho.com
Message-ID: <1173792419.602384.43070@t69g2000cwt.googlegroups.com>

maxho at maxho.com

Here spider spider spiderrrrrr!



From moogyd at yahoo.co.uk  Mon Mar 12 11:49:48 2007
From: moogyd at yahoo.co.uk (moogyd at yahoo.co.uk)
Date: 12 Mar 2007 08:49:48 -0700
Subject: Newbie Question : "grep"
Message-ID: <1173714587.830723.59210@8g2000cwh.googlegroups.com>

Hello,

I am attempting to write my first Python script to extract some
information from a file, and place it into another file.
(I am trying to find the physical postions of 4 cells within an FPGA)
I have a working solution, and would appreciate any comments.

for line in lines:

    if "placed" in line:
        if "i_a/i_b/ROM/" in line:
            pos = (line.split()[4]).split("_")[1]
            if "B18" in line:
               print "        i_a/i_b/ROM/B18 [7:6] LOC =", pos
            elif "B14" in line:
               print "        i_a/i_b/ROM/B14 [5:4] LOC =", pos
            elif "B10" in line:
               print "        i_a/i_b/ROM/B10 [3:2] LOC =", pos
            elif "B6" in line:
               print "        i_a/i_b/ROM/B6 [1:0] LOC =", pos
            else:
               print "Error"

Specific questions
- Use for "Phrase" in line or line.find("Phrase") >= 0 ?
- If I increase number of elements I am searching for, then I have
more elif...elif. Is there a cleaner solution?

Thanks for any feedback.

Steven



From psdasilvaX at esotericaX.ptX  Mon Mar 12 08:19:35 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Mon, 12 Mar 2007 12:19:35 +0000
Subject: New to Python
In-Reply-To: <mailman.4956.1173688843.32031.python-list@python.org>
References: <mailman.4956.1173688843.32031.python-list@python.org>
Message-ID: <1173702476.820962@iceman.esoterica.pt>

Alberto Vieira Ferreira Monteiro escreveu:
> Hi, I am new to Python, how stupid can be the questions I ask?
> 
> For example, how can I add (mathematically) two tuples?
> x = (1,2)
> y = (3,4)
> How can I get z = (1 + 3, 2 + 4) ?
> 
> Alberto Monteiro

I think that what you want is numpy.
I don't know too much about it but a possible solution is:

import numpy
x=numpy.array([1,2])
y=numpy.array([3,4])
z=x+y

Now z is an array containing 4,6.
You may convert it to list or tuple
z=list(z)



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 22 08:23:50 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 22 Mar 2007 13:23:50 +0100
Subject: Python-URL! - weekly Python news and links (Mar 22)
In-Reply-To: <etsq3d$jcg$1@lairds.us>
References: <etsq3d$jcg$1@lairds.us>
Message-ID: <46027530$0$10420$426a74cc@news.free.fr>

Cameron Laird a ?crit :
> This is the first time you've received "Python-URL!" in 2007.  No,
> that's not the fault of your mail server; we've just been on sabbatical.
> Now we're back.  

Great ! I was a bit worried...



From kavithapython at yahoo.co.in  Wed Mar 21 10:35:05 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Wed, 21 Mar 2007 14:35:05 +0000 (GMT)
Subject: writing dictionaries to a file
Message-ID: <267820.93071.qm@web7813.mail.in.yahoo.com>

Hi All,
   
  I have two dictionaries:
   
  somex:{'unit':00, type:'processing'}
   
  somey:{'comment':'fair', 'code':'aaa'}
  somey:{'comment':'good', 'code':bbb'}
  somey:{'comment':'excellent', 'code':'ccc'}
   
   
  now i would like to write this to a file in the following format(unit, code),,,the output should be as follows written to a file,,,
   
            00, aaa
            00, bbb
            00, ccc
   
  can someone help me?
   
  Regards
  Kavitha
   

 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
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From pecora at anvil.nrl.navy.mil  Mon Mar 19 19:23:00 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 19 Mar 2007 16:23:00 -0700
Subject: Python shell on mac os x
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
	<1hv1966.1poigs11f692njN%aleax@mac.com>
	<1174035180.781564.25130@n59g2000hsh.googlegroups.com>
	<1174084819.330438.4980@n76g2000hsh.googlegroups.com>
	<45FC20E0.3080907@codebykevin.com>
Message-ID: <pecora-98BB4E.16230019032007@ra.nrl.navy.mil>

In article <45FC20E0.3080907 at codebykevin.com>,
 Kevin Walzer <kw at codebykevin.com> wrote:

> 7stud wrote:
> > On Mar 16, 2:53 am, martin.lal... at gmail.com wrote:
> >> or go tohttp://pythonmac.org/packages/
> >>  and you have python 2.5 or python 2.4.4 with readline support
> > 
> > The download instructions seem to steer Mac users to version 2.4.4
> > because it has more modules available. What is the consensus on that?
> > 
> 
> If you just want binary packages installed, it might make sense to use 
> 2.4.4, but building new packages with 2.5 is easy: either use 
> easy_install or sudo python setup.py. I've had no trouble building the 
> stuff I need with 2.5.

And what is the stuff you need?  So we can see what definitely works.  
Thanks.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From skip at pobox.com  Fri Mar  9 21:25:43 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 9 Mar 2007 20:25:43 -0600
Subject: Python-list Digest, Vol 42, Issue 117
In-Reply-To: <45F1D33F.1050909@optonline.net>
References: <mailman.15559.1173404093.32030.python-list@python.org>
	<45F1D33F.1050909@optonline.net>
Message-ID: <17906.5927.778378.994053@montanaro.dyndns.org>


    Bart> I'm sorry, but what's wrong with:
    Bart> radix = [ [] ] * 256

Follow it up with:

    print [id(e) for e in radix]

then you tell me what's wrong with it. ;-)

Skip


From chtito at gmail.com  Sat Mar 10 09:00:04 2007
From: chtito at gmail.com (Olivier Verdier)
Date: Sat, 10 Mar 2007 15:00:04 +0100
Subject: UTF-8
Message-ID: <D83B5FFE-4A7A-471A-A26A-F52DFB40E930@gmail.com>

First off: i thoroughly enjoy python. I use it for scientific  
computing with scipy, numpy and matplotlib and it's an amazingly  
efficient and elegant language.

About this mailing list: it is very hard to search. I can't find any  
search field on the page: http://mail.python.org/mailman/listinfo/ 
python-list. I would greatly appreciate if you moved that list over  
to google, for instance, so that it be both searchable and rss-feedable.

My question is the following: how to set a default encoding in  
python? I read an old thread about that and it didn't seem possible  
by then.

The default encoding i wish to set is UTF-8 since it encodes unicode  
and is nowadays the standard encoding. Having ascii as a default  
encoding is a pretty strange choice since ascii encodes only 127  
characters (suitable only for English, without fancy symbols like ?)  
whereas utf-8 encodes virtually infinitely many characters (suitable  
for all languages). Besides, utf-8 is a superset of ascii so having  
it by default won't harm anything.

At the very least there should be a configuration file that allows to  
set a default encoding (although setting anything else than utf-8  
should be advised against). Such a feature would be greatly  
appreciated by all of us non native English speakers around the world.

Best regards,

== Olivier

From joshbloom at gmail.com  Tue Mar 13 13:12:35 2007
From: joshbloom at gmail.com (Josh Bloom)
Date: Tue, 13 Mar 2007 10:12:35 -0700
Subject: Server-side script takes way too long to launch
In-Reply-To: <e0582b0b0703131005q305ddb0dic7fdffd8811aaf22@mail.gmail.com>
References: <e0582b0b0703131005q305ddb0dic7fdffd8811aaf22@mail.gmail.com>
Message-ID: <d25b6e9a0703131012i484f0187uaffb1c080200a3a0@mail.gmail.com>

Teresa, when you call a python script this way, the server needs to load the
python interpreter for each call.

If you need faster execution you should look into having a server process
running already. Something like mod_python for apache or CherryPy will help
you speed this up.

-Josh


On 3/13/07, Teresa Hardy <thardy99 at gmail.com> wrote:
>
> I have a webpage calling a python script, using Apache
> server....http://localhost/cgi-bin/mycode.py?dmn
> I am using Firefox, WindowsXP Python 2.4
>
> I can count to 13 from the time I click to the time the browser finds the
> path.
>
> The python runs okay when I finally get to it. In the first step it just
> launches a Flash file. I benchmarked the time thru the python code and it
> isn't the slow part. It's the launch. Forgive me if I am not explaining this
> well. I am pretty much teaching myself...fumbling thru the process.
>
> Any suggestions on how to speed up the first step?
>
> Thanks,
> Teresa
>
>
>
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From silfheed at gmail.com  Thu Mar 29 20:55:33 2007
From: silfheed at gmail.com (Silfheed)
Date: 29 Mar 2007 17:55:33 -0700
Subject: Python automatic testing: mocking an imported module?
In-Reply-To: <87zm5ykobr.fsf@benfinney.id.au>
References: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
	<87zm5ykobr.fsf@benfinney.id.au>
Message-ID: <1175216133.611327.136770@b75g2000hsg.googlegroups.com>

Wow, that works great!   Thanks all!

On Mar 28, 12:02 am, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "Silfheed" <silfh... at gmail.com> writes:
> ===== foo.py =====
> class Bar(object):
>     def __init__(self):
>         self.name = "bar"
> =====
>
> ===== dostuff.py =====
> import foo
>
> def get_bar():
>     return foo.Bar()
> =====
>
> ===== test_dostuff.py =====
> import dostuff
>
> class Mock_foo_module(object):
>     """ Mock object for foo module """
>
>     class Bar(object):
>         def __init__(self):
>             self.name = "banana"
>
> def test_dostuff_get_bar_should_create_bar():
>     """ The dostuff.get_bar function should create a new Bar """
>     dostuff.foo = Mock_foo_module()
>     test_bar = dostuff.get_bar()
>     if not test_bar.name == "banana":
>         raise AssertionError("test_bar.name should be banana")
> =====
>
> This is simply using an instance of a class (Mock_foo_module) to be a
> mock 'module' object. That mock module has the required 'Bar'
> attribute, bound to a class; so the 'dostuff' module's 'foo' attribute
> can be replaced with our mock module object for the purpose of the
> test.
>
> The mock module's Bar class behaves in an idiomatic way (setting the
> 'name' attribute of its instance to a known value) that we use to
> check whether the 'dostuff' module actually used our mock module.
>
> This can be extended to mock any module interface you like, and then
> confirm that the module under test has actually used the module as
> expected.
>
> --
>  \         "A politician is an animal which can sit on a fence and yet |
>   `\               keep both ears to the ground."  -- Henry L. Mencken |
> _o__)                                                                  |
> Ben Finney




From jsalazar at madisa.com  Wed Mar  7 10:54:57 2007
From: jsalazar at madisa.com (=?ISO-8859-1?Q?Jos=E9_Antonio_Salazar_Montenegro?=)
Date: Wed, 07 Mar 2007 09:54:57 -0600
Subject: finding monitor or screen resolution in Linux with standard
	python module
In-Reply-To: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>
References: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>
Message-ID: <45EEE051.3070604@madisa.com>

I'm using Beryl too, and xwininfo -root gives te correct resolution.

akbar wrote:
> I googled and searched in archive. All I can find is finding
> resolution with Tkinter and pygame. Any idea to find monitor
> resolution with standard python module?
> I can check from output of: xprop -root
> _NET_DESKTOP_GEOMETRY(CARDINAL) . The problem is when you use Beryl or
> Xgl, it is not correct anymore because Beryl or Xgl set this value
> from amount of workspaces multiplied by monitor or screen resolution.
>
>   

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From __peter__ at web.de  Fri Mar 30 13:40:57 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Mar 2007 19:40:57 +0200
Subject: clean up html document created by Word
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
	<eujhd8$sh0$02$1@news.t-online.com>
	<1175276233.762698.105550@n59g2000hsh.googlegroups.com>
Message-ID: <euji32$8q4$01$1@news.t-online.com>

jkn wrote:

> IIUC, the original poster is asking about 'cleaning up' in the sense
> of removing the swathes of unnecessary and/or redundant 'cruft' that
> Word puts in there, rather than making valid HTML out of invalid HTML.
> Again, IIUC, HTMLtidy does not do this.

>From that very page I linked to:

"""
Tidy can now perform wonders on HTML saved from Microsoft Word 2000! Word
bulks out HTML files with stuff for round-tripping presentation between
HTML and Word. If you are more concerned about using HTML on the Web, check
out Tidy's "Word-2000" config option! Of course Tidy does a good job on
Word'97 files as well!
"""

Peter



From metaperl.etc at gmail.com  Sun Mar 18 08:52:25 2007
From: metaperl.etc at gmail.com (metaperl.etc at gmail.com)
Date: 18 Mar 2007 05:52:25 -0700
Subject: cheese shop: tagging and dating
Message-ID: <1174222345.818697.128020@e65g2000hsc.googlegroups.com>

The first thing I look at when examining a module is how often it is
updated. Unfortunately, the entries there dont show this. Eg:

  http://www.python.org/pypi/PySimpleXML/1.0

Second, it seems that tagging is more popular than the hierarchical
browsing method currently offered by Cheese Shop. Are there efforts
underway to support a tagging interface for the cheeseshop?



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 15:25:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 17:25:12 -0300
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<1huohy5.1273xi3mtqdc2N%aleax@mac.com>
	<essbfq$ro4$1$830fa7a5@news.demon.co.uk>
Message-ID: <op.toxu0a03x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 09 Mar 2007 16:10:51 -0300, Tim Bradshaw <tfb at tfeb.org> escribi?:

> On 2007-03-09 07:00:06 +0000, aleax at mac.com (Alex Martelli) said:

>> (nee "One Laptop Per Child", OLPC, and once known as the "$100 laptop")
>> uses Python as its preferred (only?-) application language, and it's
>> slated to be the most widely distributed Python distro if it hits even
>> half of its ambitious target-numbers...
> But it won't get anywhere near that because it's a stupid an
> ill-conceived idea (not because of Python, note!).  The electronic
> gadget people need in the developing world is a mobile phone not a
> computer.

What for?
That requires a phone company, installed antennas everywhere, and  
available power to charge batteries. Without forgetting  you to pay the  
bill, of course.
I don't think OLPC would actually help people so much, but a mobile phone  
would be almost useless. Like it was -actually happened- donating nice  
computers for use in remote elementary schools with no power source.

-- 
Gabriel Genellina



From rrs at researchut.com  Fri Mar 16 03:42:09 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Fri, 16 Mar 2007 13:12:09 +0530
Subject: lock problem
References: <hiqoc4-fnq.ln1@www.researchut.com>
	<op.to87x8mpx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <hbupc4-cq2.ln1@www.researchut.com>

Gabriel Genellina wrote:

> En Thu, 15 Mar 2007 18:31:29 -0300, Ritesh Raj Sarraf <rrs at researchut.com>
> escribi?:
> 
>> I'm not sure if there's something wrong in the code mentioned above or
>> is it
>> really a lock problem.
> 
> Try to break the code into smaller pieces to see what is wrong. It's too
> long for somebody to try to understand it.
> 

The only break I can do is to remove threading, and the it works fine.
I also noticed that when debugging the threads (when the program stops at a
breakpoint in the thread), data is written properly.

This is what made me think if this really is a locking problem.

Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"



From rdm at rcblue.com  Tue Mar 13 03:37:56 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 13 Mar 2007 00:37:56 -0700
Subject: number generator
In-Reply-To: <pan.2007.03.10.13.38.30.791542@REMOVE.THIS.cybersource.com .au>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<mailman.4897.1173522747.32031.python-list@python.org>
	<pan.2007.03.10.13.38.30.791542@REMOVE.THIS.cybersource.com.au>
Message-ID: <20070313073948.5F0C81E4003@bag.python.org>

At 06:38 AM 3/10/2007, Steven D'Aprano wrote:
>On Sat, 10 Mar 2007 02:32:21 -0800, Dick Moores wrote:
>
> > So why not just repeatedly call a function to generate lists of
> > length N of random integers within the appropriate range (the closed
> > interval [1,M-N-1]), and return the first list the sum of which is M?
> > I don't understand what all the discussion is about. Time is not one
> > of the constraints.
>
>Time is always a constraint. The sun will expand and destroy the Earth in
>a couple of billion years, it would be nice to have a solutions before
>then...
>
>*wink*
>
>Seriously, almost all programming problems have two implicit constraints:
>it must run as fast as practical, using as little computer resources (e.g.
>memory) as practical. Naturally those two constraints are usually in
>opposition, which leads to compromise algorithms that run "fast enough"
>without using "too much" memory.

OK, points well-taken.

The problem posed by the OP is "Given two positive integers, N and M 
with N < M, I have to generate N
positive integers such that sum(N)=M. No more constraints."

But let's say there is one more constraint--that for each n of the N 
positive integers, there must be an equal chance for n to be any of 
the integers between 1 and M-N+1, inclusive. Thus for M == 50 and N 
== 5, the generated list of 5 should be as likely to be [1,46,1,1,1] 
as [10,10,10,10,10] or [14, 2, 7, 1, 26].

Wouldn't sumRndInt() be THE solution?:
=================================================================
def sumRndInt(M, N):
     import random
     while True:
         lst = []
         for x in range(N):
             n = random.randint(1,M-N+1)
             lst.append(n)
         if sum(lst) == M:
             return lst

if __name__ == '__main__':

     N = 5
     M = 50

     lst = sumRndInt(M, N)

     print "N is %d, M is %d, lst is %s, sum(lst) is %d" % (N, M, 
lst, sum(lst))
==============================================================

I hope I don't seem querulous--I really want to know.

Thanks,

Dick Moores





From bj_666 at gmx.net  Thu Mar  1 14:02:14 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 01 Mar 2007 20:02:14 +0100
Subject: xml minidom redundant children??
References: <1172774813.293437.108250@v33g2000cwv.googlegroups.com>
Message-ID: <pan.2007.03.01.19.02.11.555341@gmx.net>

In <1172774813.293437.108250 at v33g2000cwv.googlegroups.com>, bkamrani
wrote:

> ******************************************************************************
>            xml file (fileTest) looks like:
> <?xml version="1.0" encoding="ISO-8859-1" ?>
> <afc xmlns="http://python.org/:aaa" xmlns:afc="http://
> python.org/:foo">
> <afc:Bibliography>
>    <File version="2.0.0.0" publicationDate="2007-02-16
> 11:23:06+01:00" />
>    <Revision version="2" />
>    <Application version="02.00.00" />
> </afc:Bibliography>
> </afc>
> ******************************************************************************
>             Python file looks like:
> from xml.dom import minidom
> doc = minidom.parse(fileTest)
> a= doc.documentElement.childNodes
> print a
> print '--------------'
> for item in a:
>     print item.nodeName
> ******************************************************************************
>              And output is:
> [<DOM Text node "\n">, <DOM Element: afc:Bibliography at 12082960>,
> <DOM Text node "\n">]
> --------------
> #text
> afc:Bibliography
> #text
> ******************************************************************************
> 
> My question is why this <DOM Text node "\n"> or  #text has been
> created and how to get rid of them by changing python code? (here I'm
> not interested to change xml file.)

They have been created because the text is in the XML source.  Line breaks
are valid text.

Ciao,
	Marc 'BlackJack' Rintsch


From aleax at mac.com  Mon Mar 19 01:17:39 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 22:17:39 -0700
Subject: class objects, method objects, function objects
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
Message-ID: <1hv6z0q.ussrweg1cs9xN%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:
   ...
> But the last part of the passage makes no sense to me:
> ------
> When the method object is called with an argument list, it is unpacked
> again, a new argument list is constructed from the instance object and
> the original argument list, and the function object is called with
> this new argument list.
> ------
> Can anyone interpret that for me?

Here's the Python pseudocode equivalent...

class Method(object):
  def __init__(self, im_func, im_self):
    self.im_func = im_func
    self.im_self = im_self
  def __call__(self, *a, **k):
    return self.im_func(self.im_self, *a, **k)

Whenever you get foo.somemeth from an instance foo of whatever class
(with somemeth being a method of that class), you obtain the equivalent
of a Method(type(foo).__dict__('somemeth'), foo) in the above
pseudocode.  When you call that foo.somemeth, the im_self (i.e., foo) is
prepended to other positional arguments (if any).

This, btw, takes place in the __get__ method of the function object
somemeth -- function objects are descriptors, i.e., they have __get__
methods, and that's just what they do.

If this is still a bit obscure to you, perhaps more practice with Python
may be needed before you dwell into the internals of methods &c.


Alex


From manstey at csu.edu.au  Sun Mar 25 21:44:17 2007
From: manstey at csu.edu.au (manstey)
Date: 25 Mar 2007 18:44:17 -0700
Subject: replacing one instance with another
In-Reply-To: <1174873114.590028.130920@p15g2000hsd.googlegroups.com>
References: <1174873114.590028.130920@p15g2000hsd.googlegroups.com>
Message-ID: <1174873457.277591.135390@y66g2000hsf.googlegroups.com>

Hi,

I solved it myself! I realised that __new__ creates self prior to
init, so this works:

>>>dic_myinstances={}

>>>class MyClass(object):
    def __new__(self,id):
        global dic_myinstances
        if dic_myinstances.has_key(id):
            return dic_myinstances[id]
        else:
            dic_myinstances[id] = self
            return self


>>>ins1 = MyClass('xx')
>>>ins2 = MyClass('yy')
>>>ins3 = MyClass('xx')
>>>print ins3 is ins1
True

Is this the best way to do this?



From gigs at hi.t-com.hr  Tue Mar 27 09:20:08 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 27 Mar 2007 15:20:08 +0200
Subject: tkinter popup
In-Reply-To: <op.tpujstcdyvwwzh@ericb.pragmadev>
References: <euaq8n$1l9$1@ss408.t-com.hr> <op.tpujstcdyvwwzh@ericb.pragmadev>
Message-ID: <46091A08.2020305@hi.t-com.hr>

Eric Brunel wrote:
> On Tue, 27 Mar 2007 12:05:07 +0200, Gigs_ <gigs at hi.t-com.hr> wrote:
> 
>> Hi all
>>
>> I cant figure out how to disable resizing of my popup window?
> 
> myPopupWindow.wm_resizable(0, 0)
> 
> It may or may not make resize controls disappear depending on your 
> platform and/or window manager. But the resizing will be impossible in 
> any case.
> 
>> How to put this popup window to show in the middle of my text editor?
>> It is writen with Toplevel.
> 
> A bit trickier. For example (untested):
> 
> myPopupWindow.after_idle(centerPopupWindow)
> 
> with:
> 
> def centerPopupWindow():
>   x, y = editorWindow.winfo_rootx(), editorWindow.winfo_rooty()
>   w, h = editorWindow.winfo_width(), editorWindow.winfo_height()
>   ww, hh = myPopupWindow.winfo_width(), myPopupWindow.winfo_height()
>   myPopupWindow.geometry('%sx%s+%s+%s', ww, hh, x + w/2 - ww/2, y + h/2 
> - hh/2)
> 
> The after_idle trick is needed since the dimensions for the popup window 
> will only be known when the window is actually displayed. In theory, 
> myPopupWindow.update_idletasks() should update the display so that the 
> window dimensions are known, but there are cases where it doesn't work. 
> So the after_idle trick is surer.
> 
> HTH
> --python -c "print ''.join([chr(154 - ord(c)) for c in 
> 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

thanks for both replay, they are very helpful. specially this one, it 
will took some times for me to figure this. i was completely forgot that 
this can be done like that

thx


From paddy3118 at googlemail.com  Fri Mar  9 00:43:00 2007
From: paddy3118 at googlemail.com (Paddy3118)
Date: 8 Mar 2007 21:43:00 -0800
Subject: VIM: Python type indented-block command equivalent to % for C?
In-Reply-To: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>
References: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>
Message-ID: <1173418980.175776.245980@n33g2000cwc.googlegroups.com>

On Mar 8, 5:02 am, "Paddy3118" <paddy3... at googlemail.com> wrote:
>   Not python:
>     but python type
>     indented text
>
>     Notice the blank line above.
>     It could have several
>     spaces or tabs, and still
>     be a part of the block
>     beginning 'Not python:':
>       The block ends at the
>       first non-blank line
>       with less indent.
>
> Assuming that only space characters are allowed
> for indenting, is their a way to yank a Python
> block like y% works for C , or a way to move to
> the end of a block defined by indentation?
>
> I have tried help indent but could not find
> anything.
>
> Thanks, Paddy.

I have installed the following plugins for my Python work:
taglist
  http://vim-taglist.sourceforge.net/images/taglist_python.gif
python.vim
  http://vim.sourceforge.net/scripts/script.php?script_id=30
and Bicycle Repair Man
   http://bicyclerepair.sourceforge.net/

- Paddy



From bbxx789_05ss at yahoo.com  Sat Mar 24 13:41:12 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 10:41:12 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <Xns98FD812654515duncanbooth@127.0.0.1>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<Xns98FD812654515duncanbooth@127.0.0.1>
Message-ID: <1174758072.851763.80860@e1g2000hsg.googlegroups.com>

On Mar 24, 8:30 am, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> In case you are feeling that the ','.join(l) looks a bit jarring, be aware
> that there are alternative ways to write it. You can call the method on the
> class rather than the instance:
>
>    jl = str.join(',', l)
>    jl = unicode.join(u'\u00d7', 'l')
>
>... the catch is you need to know
> the type of the separator in advance.

When I try the latter example, I get an error:

lst = ["hello", "world"]
print unicode.join(u"\u00d7", lst)

Traceback (most recent call last):
  File "test1.py", line 2, in ?
    print unicode.join(u"\u00d7", lst)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xd7' in
position 5: ordinal not in range(128)



From jstroud at mbi.ucla.edu  Mon Mar 26 17:21:30 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 26 Mar 2007 14:21:30 -0700
Subject: osx tkinter listbox problem
In-Reply-To: <nbednXit24cYWprbnZ2dneKdnZydnZ2d@scnresearch.com>
References: <nbednXit24cYWprbnZ2dneKdnZydnZ2d@scnresearch.com>
Message-ID: <eu9dgr$itg$1@daisy.noc.ucla.edu>

Ben Collver wrote:
> I am using Darwin 10.4.9, tcl 8.4.7, tk 8.4, and python 2.3.5.  I have 
> also tried Python 2.5 on Darwin, Debian, and Fedora Core 6.
> 
> I am working on a GUI front-end to a Python program of mine.  It is a 
> simple grid with labels in the left column and input widgets in the 
> right column.  One of the rows has a listbox in the right column.  The 
> listbox contains two items.  I select one using widget.select_set(). The 
> GUI is not complete yet, because I am still learning about Python and 
> Tkinter.
> 
> On Linux, the GUI works as expected.  On OSX, when select_set() runs, 
> the listbox disappears from its place in the grid, and appears in the 
> upper left corner of the window.  Here are screen shots to illustrate.
> http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysfi-debian.jpg 
> 
> http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysfi-osx.png
> 
> The GUI code itself is at the following location.
> http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysfi.py
> 
> To run, it needs the Python program at the following location.
> http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysf.py
> 
> Why does the listbox change position at all?  Am I using listbox 
> incorrectly?
> 
> Thank you,
> 
> Ben
> 
> 

I think you couldn't be using Listbox more correctly.

It looks like Tk aqua is broke here--which is not unusual because its 
still evolving. Perhaps you could file a bug report?

A "cross platform" work-around might be to grid a frame at the row and 
column of self.Main and pack the Listbox into the Frame. I don't have a 
Mac at work to test this, however. But I would be curious to know your 
results if you try it.

James


From daniel.neilson at gmail.com  Fri Mar 16 18:11:05 2007
From: daniel.neilson at gmail.com (dhn)
Date: 16 Mar 2007 15:11:05 -0700
Subject: How to get the previous line in a file?
In-Reply-To: <1174079400.953196.249730@e1g2000hsg.googlegroups.com>
References: <882682.16208.qm@web58912.mail.re1.yahoo.com>
	<mailman.5194.1174078319.32031.python-list@python.org>
	<1174079400.953196.249730@e1g2000hsg.googlegroups.com>
Message-ID: <1174083065.615475.211610@p15g2000hsd.googlegroups.com>

On Mar 16, 5:10 pm, kyoso... at gmail.com wrote:
> On Mar 16, 3:51 pm, Shane Geiger <sgei... at ncee.net> wrote:
>
>
>
> > lines = open('/tmp/foo.py',
> > "r").read().splitlines()
>
> > previous_line =
> > ''
>
> > for line in
> > lines:
>
> >     if "foo" in
> > line:
>
> >         print "found foo in the current line.  The previous line is:  "
> > +
> > previous_line
>
> >     previous_line =
> > line
>
> > Qilong Ren wrote:
> > > Hi,all
>
> > > I am new to this list. And I am glade I am here.
> > > I have a question. I need to do some text processing. I need to read
> > > from a file line by line. If some line is met with some condition, the
> > > previous line needs some modification. How to get the info of the
> > > previous line?
>
> > > Thanks!
> > > Qilong
>
> > > ------------------------------------------------------------------------
> > > Never miss an email again!
> > > Yahoo! Toolbar
> > > <http://us.rd.yahoo.com/evt=49938/*http://tools.search.yahoo.com/toolb...>
> > > alerts you the instant new Mail arrives. Check it out.
> > > <http://us.rd.yahoo.com/evt=49937/*http://tools.search.yahoo.com/toolb...>
>
> > --
> > Shane Geiger
> > IT Director
> > National Council on Economic Education
> > sgei... at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> > Leading the Campaign for Economic and Financial Literacy
>
> >  sgeiger.vcf
> > 1KDownload
>
> Hi,
>
> You should be able to use the file object's seek and tell methods. Or,
> since you're using a list, you could use a counter and when the text
> is found, you can print the previous line by subtracting one from the
> counter.
>
> counter = 0
> for line in lines:
>    if 'foo' == line:
>       print 'found line. the previous line is: ' %s (lines[counter-1])
>    counter += 1
>
> # Or something like that. Experiment!
>
> Mike

A more pythonic solution makes use of enumerate().

for number, line in enumerate(lines):
    if line == 'foo':
        print 'found line. the previous line is: %s' % lines[number -
1]



From hipertracker at gmail.com  Thu Mar 22 12:54:31 2007
From: hipertracker at gmail.com (Jaroslaw Zabiello)
Date: Thu, 22 Mar 2007 16:54:31 +0000
Subject: ZSI, SOAP and .NET web services - problem
Message-ID: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>

I try to connect to web services (written in C#/.NET) with latest ZSI
2.0rc3 library. It just does not work.

from ZSI.ServiceProxy import ServiceProxy 
wsdl = 'http://192.168.0.103/NewWebServices/TemplateInsert.asmx?wsdl' 
print ServiceProxy(wsdl, tracefile=sys.stdout) 

"C:\opt\Python25\lib\site-packages\zsi-2.0_rc3-py2.5.egg\ZSI\wstools\WSDLTools.py",
line 1116, in getAddressBinding 
WSDLError: No address binding found in port. 

This pythonic library must be stupid, because I have no problem to connect
with... Ruby:

require 'soap/wsdlDriver'
require 'rexml/document'
wsdl = 'http://192.168.0.103/NewWebServices/TemplateInsert.asmx?wsdl'
soap = SOAP::WSDLDriverFactory.new(wsdl).create_rpc_driver
#soap.wiredump_file_base = 'soapresult'
p soap.templateInsert('')

It is a shame why Python still has so poor SOAP implementation. Ruby has
SOAP in *standard library*, Python - not. Even PHP5 has very good SOAP
library built in. 

I tried to use different library - SOAPpy, but I couldn't. It requires
fpconst library which cannot be installed because its server does not
respond at all. What a shit...

Why nobody wants to add SOAP to standard Python library? XML-RPC was added
and it works without any problems.

-- 
Jaros?aw Zabie??o
http://blog.zabiello.com


From ALEXURC at gmail.com  Thu Mar 29 16:40:58 2007
From: ALEXURC at gmail.com (ALEXURC at gmail.com)
Date: 29 Mar 2007 13:40:58 -0700
Subject: File deletion after 72 hours of creation
In-Reply-To: <mailman.5760.1175184145.32031.python-list@python.org>
References: <1175183124.401829.41330@n76g2000hsh.googlegroups.com>
	<mailman.5760.1175184145.32031.python-list@python.org>
Message-ID: <1175200858.490405.38950@e65g2000hsc.googlegroups.com>

On Mar 29, 12:02 pm, s... at pobox.com wrote:
>     Alex> I'm looking for a simple method to delete a folder after 72
>     Alex> "Business hours" (saturday/sunday doesnt count) since its
>     Alex> creation. Note that This is on a linux system and I realize that
>     Alex> it will be the last modified time. These files wont be modified
>     Alex> since their creation.
>
>     Alex> Im very confused on how to work with the number easily.
>
> Take a look at the dateutil module.  Its relativedelta object has some
> weekday sense:
>
>    http://labix.org/python-dateutil
>
> Skip

Hey, thanks for the reply, I was able to accomplish it (somewhat ugly)
using the datetime module alone. Here is my code.
the part with the timestamp.file is just a plaintext file containg
"#year#month#day" that is created when my client side program copies
files into my directory.

Just posting the code so if anyone else is wondering how to do this
ever maybe they can find some of this useful:
---

#!/usr/bin/env python

import datetime
import os
today = datetime.date.today().toordinal()
serverFiles = os.listdir("/home/webserver/")
theDirList=[]
for xfile in serverFiles:
        if os.path.isdir("/home/webserver/" + xfile) == True:
                theDirList.append(xfile)


for xdir in theDirList:
        foo=open("/home/webserver/"+ xdir + "/timestamp.file",'r')
        parseMe = foo.readlines()
        fileDate=parseMe[0].split("#")
        fileYear = fileDate[1]
        fileMonth = fileDate[2]
        fileDay = fileDate[3]

        age_of_file = today -
datetime.date(int(fileYear),int(fileMonth),int(fileDay)).toordinal()
        true_age = age_of_file
        for i in range(age_of_file):
                d=
datetime.date(int(fileYear),int(fileMonth),int(fileDay)+i)
                ourDay = d.weekday()
                if ourDay == 5 or ourDay == 6:
                        true_age = true_age - 1

 print xdir + " : " + str(true_age) + " days old"



From B.Ogryczak at gmail.com  Fri Mar  9 10:46:25 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 9 Mar 2007 07:46:25 -0800
Subject: Is this right? Multiple imports of same module.
In-Reply-To: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
Message-ID: <1173455185.225036.167700@64g2000cwx.googlegroups.com>

On Mar 9, 3:30 pm, Lou Pecora <pec... at anvil.nrl.navy.mil> wrote:
> Then mymodule is imported only once, but each module has access to it
> through the module name (mod1 and mod2) and the alias MM (mod3).  Is
> that right?

Yes, it is.

> I was concerned about multiple imports and efficiency.

If the module is already loaded, it won't be loaded again. Dictionary
of loaded modules is avaliable as sys.modules.





From hg at nospam.org  Wed Mar 28 04:00:30 2007
From: hg at nospam.org (hg)
Date: Wed, 28 Mar 2007 10:00:30 +0200
Subject: socket read timeout
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
	<mailman.5668.1175003334.32031.python-list@python.org>
	<VegOh.15507$nh4.13055@newsfe20.lga>
	<mailman.5688.1175034299.32031.python-list@python.org>
	<MukOh.12989$Ng1.10639@newsfe19.lga>
	<mailman.5706.1175086116.32031.python-list@python.org>
Message-ID: <upvOh.13563$Ng1.13318@newsfe19.lga>

skip at pobox.com wrote:

> 
>     hg> My issue with that is the effect on write: I only want a timeout
>     on
>     hg> read ...  but anyway ...
> 
> So set a long timeout when you want to write and short timeout when you
> want to read.
> 
> Skip


Not bad  .. thanks



From sergio.correia at gmail.com  Wed Mar  7 19:41:16 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 7 Mar 2007 19:41:16 -0500
Subject: Flatten a two-level list --> one liner?
In-Reply-To: <op.tougqyqzx6zn5v@gabriel2.softlabbsas.com.ar>
References: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>
	<op.tougqyqzx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <f1aa6d810703071641g61b4d40fwdfb767235afa17be@mail.gmail.com>

I forgot to say: I've already checked the discussions about
recursive/iterative/etc flatten() functions that can sweep through a
list of arbitrary length, but that's really overkill for what I want.

However, "sum(eggs, [])" or itertools seem to do it w/out the need for
a new function.

Thanks a lot!

Sergio

On 3/7/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> En Wed, 07 Mar 2007 21:14:43 -0300, Sergio Correia
> <sergio.correia at gmail.com> escribi?:
>
> > I'm looking for an easy way to flatten a two level list like this
>
> Try google.
>
> > PS: Why does `sum` works only with numbers?
>
> Try google.
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From seo at yourseoconsulting.com  Wed Mar  7 22:31:51 2007
From: seo at yourseoconsulting.com (Se0 Guy)
Date: Thu, 08 Mar 2007 03:31:51 GMT
Subject: Seo , Search Engine Optimizer , Seo Search engine Optimization ,
	search engine optimization services, SEO Consulting
Message-ID: <HsLHh.1251627$1T2.746098@pd7urf2no>

Search Engine Optimization http://www.yourseoconsulting.com/  Seo Optimization , Semantic Results, Artificial intelligence in Search, Auto Content Generators, Search Engine Results. SEO optimizer. SEO consulting



From paddy3118 at googlemail.com  Tue Mar  6 13:31:24 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 6 Mar 2007 10:31:24 -0800
Subject: Using string as file
In-Reply-To: <eshtk3$jat$1@news.in.tum.de>
References: <eshtk3$jat$1@news.in.tum.de>
Message-ID: <1173205884.365173.99390@j27g2000cwj.googlegroups.com>

On Mar 5, 8:13 pm, Florian Lindner <Florian.Lind... at xgm.de> wrote:
> Hello,
> I have a function from a library thast expects a file object as argument.
> How can I manage to give the function a string resp. have the text it would
> have written to file object as a string?
>
> Thanks,
>
> Florian

You can also look at example 3 here:
  http://en.wikipedia.org/wiki/Doctest#Example_3:_unique_words.py

- Paddy.



From gagsl-py2 at yahoo.com.ar  Sun Mar 11 09:27:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 10:27:15 -0300
Subject: threading and iterator crashing interpreter
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
	<1173617253.901671.136910@q40g2000cwq.googlegroups.com>
Message-ID: <op.to00zpocx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 09:47:34 -0300, Janto Dreijer <jantod at gmail.com>  
escribi?:

> As far as I can tell I'm not running it from restricted mode
> explicitly.

This error is rather strange then:

> > RuntimeError: instance.__dict__ not accessible in restricted mode

"restricted mode" means that the current builtins are not the standard  
builtins.


> The reason I'm doing the random.choice() is so I don't have a handle
> ("session" in this case) that would prevent it from being garbage
> collected. I am not bothered by the Python-level Exceptions. I am
> bothered by the interpreter throwing a segfault. What I suspect is
> happening is the Session object is deallocated, while it still has a
> reference from within the iterator.

But on your code Session objects are never deleted; they stay inside  
System.sessions. Having an extra reference (the session variable) doesnt  
matter.

> It's quite difficult to reproduce these bugs consistently. You might
> need to run it a few times.

At least, the problem of using the same generator from different threads  
still remains, if you don't use my modified code. In general, when using  
multiple threads you always need some way to syncronize access to shared  
objects. You are lucky with Sessions because append is an atomic operation  
on lists; for more information see  
http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-thread-safe.htm

-- 
Gabriel Genellina



From ljz at asfast.com  Sat Mar  3 07:22:47 2007
From: ljz at asfast.com (Lloyd Zusman)
Date: Sat, 03 Mar 2007 07:22:47 -0500
Subject: print a ... z, A ... Z, "\n"' in Python
References: <mailman.4623.1172909667.32031.python-list@python.org>
	<1172913109.184004.132680@30g2000cwc.googlegroups.com>
	<a23effaf0703030142t42d5bb51jc0fe761e51294f25@mail.gmail.com>
	<a23effaf0703030145p7943faabv7560cdfb0fb7cb24@mail.gmail.com>
Message-ID: <87k5xybjoo.fsf@asfast.com>

"js " <ebgssth at gmail.com> writes:

>> But note that you return the last item of the range too, and that
>> goes against the semantic of the usual Python range/xrange, so you
>> may want to call this function with another name.
>
> That makes sense. 100% agree with you.
>
>> Maybe there are better ways to solve this problem. Maybe a way to
>> generate (closed?) char ranges can be added to the Python standard
>> lib.
>
> Maybe we don't want char range If string constants would be rich
> enough.

But as soon as we want a string that doesn't correspond to any
pre-defined constants, we're hosed.  For example, there isn't
a constant that would correspond to this Perl-ism:

  print l ... w, e ... j, L ... W, E ... J, "\n";


-- 
 Lloyd Zusman
 ljz at asfast.com
 God bless you.



From QHorizon at gmail.com  Sat Mar  3 18:36:36 2007
From: QHorizon at gmail.com (QHorizon at gmail.com)
Date: 3 Mar 2007 15:36:36 -0800
Subject: Problem with returning prime number in a simple calculation program
Message-ID: <1172964996.193310.251650@j27g2000cwj.googlegroups.com>

Hello, I'm new to Python (I've learned everything up to iterators so
far) and fairly new to Programming.  This would be my first real
program:

#Coordinate Geometry (The whole program is not shown)

import math
import sys

print "Welcome to the Coordinate Geometry Calculator!"
print "Type 'terms' for a list of commands"

def main():
	print
	command = raw_input("Command? ")
	if command == "terms":
		terms()
		main()
	elif command == "distance":
		distance()
		main()
	elif command == "slope":
		slope()
		main()
	elif command == "endpoint":
		endpoint()
		main()
	elif command == "midpoint":
		midpoint()
		main()
	elif command == "prime":
		prime()
		main()
	elif command == "quit":
		sys.exit
	else:
		print "Not a valid command"
		main()

#...Declaring functions here...

def prime():
	num = input("Number ")
	i = num - 1
	divcounter = 0
	while i > 1:
		if num % i != 0:
			divcounter += 1
			i -= 1
	if divcounter == num - 2:
		print num, "is a prime number"
	else:
		print num, "is not a prime number"

#Start the program
main()

As it says in the title, I'm having trouble with the prime number
function.  It will print the sentence if the number is prime, but it
if isn't, the program goes into a state in the terminal where the
program never ends and you can just keep on typing.  Maybe the else
statement is ineffective?  Any ideas on how to fix this?



From kyosohma at gmail.com  Wed Mar 28 14:06:28 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 28 Mar 2007 11:06:28 -0700
Subject: XML/encoding/prolog/python hell...
In-Reply-To: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
References: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
Message-ID: <1175105188.258960.191650@n59g2000hsh.googlegroups.com>

On Mar 28, 12:40 pm, "fscked" <fsckedag... at gmail.com> wrote:
> I am a beginning pythoner and I am having a terrible time trying to
> figure out how to do something that (it would seeme to me) should be
> fairly simple.
>
> I have a CSV file of unknown encoding and I need to parse that file to
> get the fields <--- DONE
> I need to create an xml document that has the proper prolog and
> namespace information in it. <--- NOT DONE
> I need it to be encoded properly<--- Looks right in IE, not right in
> any other app.
>
> I should say that I have googled my butt off, tried ElementTree,
> CSV2XML, and various other things and cannot get any of them to work.
>
> A sample of the output I am looking for is as follows:
>
> <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
> <ns2:boxes xmlns:ns2="Boxes">
>         <ns2:box id="9" mac="333333" d_a="2006" hw_ver="v1.1" sw_ver="3"
> pl_h="No Data" name="Lounge" address="here" phone="555-5555"
> country="US" city="LA"/>
>         <ns2:box id="7" mac="444444" d_a="2005" hw_ver="v1.0" sw_ver="3"
> pl_h="No Data" name="MyHouse" address="there" phone="555-5556"
> country="US" city="New York"/>
> </ns2:boxes>
>
> Is there some fundamental thing I am not getting? I cannot get
> 'tostrings' to work in ElementTree and I cannot figure the prolog out.
>
> I posted a similar message back in January, but haven't had much luck.
>
> PS
> No I haven't been trying to do this since January, more important
> things came up at work and I have just revived this. :)

I've never done this, but I found a recipe on the ActiveState website
that looks like it would be helpful:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/159100

I think you could modify it to make it work.

You could probably also use a combination of the csv module and the
pyxml module (links below).

http://pyxml.sourceforge.net/topics/
http://www.rexx.com/~dkuhlman/pyxmlfaq.html

I also found a Python XML book: http://www.oreilly.com/catalog/pythonxml/chapter/ch01.html

I hope that helps. I've started my own adventure into XML with XRC and
wxPython.

Mike



From has.temp3 at virgin.net  Sun Mar 25 06:37:26 2007
From: has.temp3 at virgin.net (has)
Date: 25 Mar 2007 03:37:26 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174758927.095854.167030@e65g2000hsc.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<1174758927.095854.167030@e65g2000hsc.googlegroups.com>
Message-ID: <1174819046.505457.221540@n59g2000hsh.googlegroups.com>

On 24 Mar, 18:55, "7stud" <bbxx789_0... at yahoo.com> wrote:
> I don't know if there is a framework install for 2.5.

http://www.python.org/ftp/python/2.5/python-2.5-macosx.dmg


has
--
http://appscript.sourceforge.net
http://rb-appscript.rubyforge.org
http://appscript.sourceforge.net/objc-appscript.html



From http  Tue Mar 13 18:22:52 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 14:22:52 -0800
Subject: help!! *extra* tricky web page to extract data from...
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
	<55oli1F25u2dmU1@mid.uni-berlin.de>
Message-ID: <7xmz2gbx6r.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:
> Still, some pages are AJAX, you won't be able to scrape them easily
> without analyzing the JS code.

Sooner or later it would be great to have a JS interpreter written in
Python for this purpose.  It would do all the same operations on an
HTML/XML DOM that a browser does, basically all the stuff of a browser
except rendering into pixels.  JS semantics are similar enough to
Python that maybe the JS could be compiled into Python byte code.


From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 05:51:39 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 19:51:39 +1000
Subject: Class factory functions
Message-ID: <pan.2007.03.25.09.51.37.438285@REMOVE.THIS.cybersource.com.au>

Here's a simple class-factory function that returns a sub-class of the
old-style class it is passed.

def verbosify_oclass(klass):
	"""Returns a verbose sub-class of old-style klass."""
	class VClass(klass):
		def __init__(self, *args, **kwargs):
			print "Calling initializer __init__ ..."
			klass.__init__(self, *args, **kwargs)
	return VClass


Here it is in action:

>>> class Parrot:
...     def __init__(self, colour): self.colour = colour
...
>>> VParrot = verbosify_oclass(Parrot)
>>> bird = VParrot('red')
Calling initializer __init__ ...
>>> bird.colour
'red'


Here's an equivalent for new-style classes. It uses super() because I
understand that super() is preferred to calling the super-class by name.


def verbosify_nclass(klass):
    """Returns a verbose sub-class of new-style klass."""
    class VClass(klass):
        def __new__(cls, *args, **kwargs):
            print "Calling constructor __new__ ..."
            return super(klass, cls).__new__(cls, *args, **kwargs)
        def __init__(self, *args, **kwargs):
            print "Calling initializer __init__ ..."
            super(klass, self).__init__(*args, **kwargs)
    return VClass



But it doesn't work:

>>> vint = verbosify_nclass(int)
>>> vint(42)
Calling constructor __new__ ...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 6, in __new__
TypeError: object.__new__(VClass) is not safe, use int.__new__()


What am I doing wrong? 


Here's one solution: dump the call to super() and call the super-class
directly. It seems to work. Are there any problems in not using super()?
What about multiple inheritance?


def verbosify_nclass2(klass):
    """Returns a verbose sub-class of new-style klass."""
    class VClass(klass):
        def __new__(cls, *args, **kwargs):
            print "Calling constructor __new__ ..."
            return klass.__new__(klass, *args, **kwargs)
        def __init__(self, *args, **kwargs):
            print "Calling initializer __init__ ..."
            super(klass, self).__init__(*args, **kwargs)
    return VClass



-- 
Steven.



From openopt at ukr.net  Wed Mar 14 12:57:24 2007
From: openopt at ukr.net (dmitrey)
Date: 14 Mar 2007 09:57:24 -0700
Subject: Python equivalents to MATLAB str2func, func2str, ischar, isfunc?
Message-ID: <1173891444.243400.41690@e65g2000hsc.googlegroups.com>

I can't find these via web serch

thank you in advance,
Dmitrey



From kw at codebykevin.com  Mon Mar 19 13:24:57 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Mon, 19 Mar 2007 13:24:57 -0400
Subject: PythonCard or Dabo?
Message-ID: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>

I'm curious to know what others think of these two frameworks for 
building wxPython apps.

PythonCard has been around longer, but its development seems to have 
slowed. The last release, 0.8.2, has been out for quite awhile now.

Dabo is newer and seems to have gathered a lot of buzz.

Anyone try both? What's your preference and why? Is one more robust than 
the other?

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From michael.tiller at gmail.com  Tue Mar  6 09:01:20 2007
From: michael.tiller at gmail.com (michael.tiller at gmail.com)
Date: 6 Mar 2007 06:01:20 -0800
Subject: ANN: PyDSTool now compatible with numpy 1.0.1,
	scipy 0.5.2 and 64-bit CPUs.
In-Reply-To: <mailman.4701.1173151076.32031.python-list@python.org>
References: <mailman.4239.1172001680.32031.python-list@python.org>
	<2ff9b$45db652f$d443bb3a$29705@news.speedlinq.nl>
	<1172579296.156674.203150@j27g2000cwj.googlegroups.com>
	<mailman.4607.1172855235.32031.python-list@python.org>
	<1173135681.180640.209810@30g2000cwc.googlegroups.com>
	<mailman.4701.1173151076.32031.python-list@python.org>
Message-ID: <1173189680.342756.124950@8g2000cwh.googlegroups.com>

On Mar 5, 10:17 pm, "Rob Clewley" <r... at cornell.edu> wrote:

> I have a different and admittedly limited view of hybrid systems as
> part of dynamical systems theory. In principle, I would love to have
> time to write an interface to something like Modelica, but PyDSTool
> isn't intended as an industrial-scale simulation package: it is
> intended for applied dynamical systems research involving small
> systems that people want to analyze with tools like bifurcation theory
> and parameter estimation.
...
> Sorry to be taking a short-term view here (I try to avoid
> that), but we're just a couple of guys trying to concentrate on our
> day jobs...

As long as these are your stated objectives I certainly can't take any
issue with them.  In fact, I qualified my statement with "I don't know
your ultimate goals" for precisely this reason.  Without knowing your
goals I certainly can't made a valid argument about your approach.  I
am glad that you appear to have understood the spirit of the comment.

If you ever do decide to consider larger scale models, you might want
to look into "OpenModelica" (an open source implementation from
Linkoeping University).  It includes a compiler that can take Modelica
code and generate "flat Modelica" (processing inheritance, hierarchy,
replaceable components, etc. down to just variables and equations).

One final note on perspective.  The main driver for my comment is that
I am an industrial user but I would love to have these kinds of
analysis capabilities.  I see that as one of the remaining
opportunities in Modelica (i.e. the ability to build niche analysis
capabilities, which commercial vendors perhaps could not justify,
around a standard description).  Having it done within a Python
framework would be icing on the cake. :-)

> Rob

--
Mike



From mwilson at the-wire.com  Fri Mar 23 15:41:55 2007
From: mwilson at the-wire.com (Mel Wilson)
Date: Fri, 23 Mar 2007 15:41:55 -0400
Subject: exit to interpreter?
In-Reply-To: <79D1F2A3-CDD2-4344-B70F-2B3FA3532782@cs.hmc.edu>
References: <mailman.5522.1174672336.32031.python-list@python.org>	<1174673079.976162.307960@n76g2000hsh.googlegroups.com>
	<79D1F2A3-CDD2-4344-B70F-2B3FA3532782@cs.hmc.edu>
Message-ID: <eu1ami$iv8$1@sea.gmane.org>

belinda thom wrote:
> On Mar 23, 2007, at 11:04 AM, kyosohma at gmail.com wrote:
> 
>> On Mar 23, 12:52 pm, belinda thom <b... at cs.hmc.edu> wrote:
>>> Hi,
>>>
>>> I'm writing a function that polls the user for keyboard input,
>>> looping until it has determined that the user has entered a valid
>>> string of characters, in which case it returns that string so it can
>>> be processed up the call stack. My problem is this. I'd also like it
>>> to handle a special string (e.g. 'quit'), in which case control
>>> should return to the Python command line as opposed to returning the
>>> string up the call stack.
>>>
>>> sys.exit seemed like a good choice, but it exits the python  
>>> interpreter.
>>>
>>> I could use an exception for this purpose, but was wondering if
>>> there's a better way?

A custom-defined exception is probably the best way to jump out of a 
stack of nested calls.


	Mel.



From http  Fri Mar  2 21:06:02 2007
From: http (Paul Rubin)
Date: 02 Mar 2007 18:06:02 -0800
Subject: Perl and Python, a practical side-by-side example.
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <7x3b4nhyid.fsf@ruckus.brouhaha.com>

Here's my version (not tested much).  Main differences from yours:

1. It defines a Python class to hold row data, and defines the __cmp__ operation
on the class, so given two Row objects r1,r2, you can say simply
   if r1 > r2: ...
to see which is "better".  

2. Instead of reading all the rows into memory and then scanning the
list of records of each piid, it simply remembers the best it has seen
for each piid.

By putting the "better than" logic into the class definition, the main
loop becomes very simple.  It does parse out and store fields on the
Row objects consuming some extra memory, but you could eliminate that
at the cost of a little code and speed by re-parsing as needed in the
comparison function.

================================================================

#! /usr/bin/env python

import sys

class Row:
    def __init__(self, row):
        self.row = row.rstrip('\n')
        fields = self.row.split('\t')
        self.piid = fields[0]
        self.state = fields[1]
        self.expiration_date = fields[5]
        self.desired_state = fields[6]

    def __cmp__(self, other):
        # return +1 if self is better than other, -1 if other is better
        # than self, or 0 if they are equally good
        if self.state == self.desired_state:
            if other.state != other.desired_state:
                return 1
            return cmp(self.expiration_date, other.expiration_date)
        elif other.expiration_date > self.expiration_date:
            # other record is better only if its exp date is newer
            return 1
        return 0
    
best = {}
input = sys.stdin

for row in input:
    r = Row(row)
    if r.piid not in best or r > best[r.piid]:
        best[r.piid] = r

for piid,r in best.iteritems():
    print r.row


From AWasilenko at gmail.com  Thu Mar 22 23:34:21 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 22 Mar 2007 20:34:21 -0700
Subject: Printing from a text file quirk
Message-ID: <1174620861.374740.203670@l75g2000hse.googlegroups.com>

I have a html document saved as a text file that I'm trying to load.
Its just the header section so my object is to read all the lines till
I hit the <title> tag, break, then read the rest.  I have kinda
achieved what I wanted, but I'm getting a new line where I stopped.
It will become clear once you see the code.  So my question is how do
I fix it, or is their an easier way?

Python code:
self.headertxt = open("pages/header.html","r")

*** Irrelevant code omitted ***

headerp1 = ""
for i in range(5):
	headerp1 += self.headertxt.readline()
headerp2 = self.headertxt.readline(7)
headerp3 = self.headertxt.readline()
headerp4 = self.headertxt.read()
return headerp1 + headerp2 + headerp3 + pagetitle + headerp4

Here is the textfile im reading:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<title></title>
<meta name="Generator" content="EditPlus" />
<meta name="Author" content="Adam W." />
<meta name="Description" content="Blah Blah Blah" />
</head>"""

and here is the output:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">

<head>
<title>
this is a new title
</title>
<meta name="Generator" content="EditPlus" />
<meta name="Author" content="Adam W." />
<meta name="Description" content="Blah Blah Blah" />
</head>"""

As you can see what I was trying to acheive was <title>the title</
title> all on the same line.  Help!



From aisaac at american.edu  Thu Mar  8 12:26:10 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 08 Mar 2007 17:26:10 GMT
Subject: pylint: don't warn about tabs
Message-ID: <SGXHh.522$mh.330@trnddc05>

I am brand new to pylint.
As a tab user, I want the tabs warning turned off.
How?

Larger question:
where is the config file format documented?

Thanks,
Alan Isaac

PS This is a wonderful tool.




From imssnotify at mindshift.com  Thu Mar 15 03:51:10 2007
From: imssnotify at mindshift.com (IMSS)
Date: Thu, 15 Mar 2007 03:51:10 -0400
Subject: mindSHIFT's InterScan MSS has removed attachment(s) 
Message-ID: <NVASRBH000062EWnbvN0053d6b8@smtpout.mindshift.com>

The advanced content filter defined by mindSHIFT Technologies has removed the attachment(s) from the following message based on attachment type. 







Reference Information: 







Message sender: python-list at python.org







Message recipients: angiem at eia.org







Message subject: ?Message could not be delivered?







Incident time: Thu Mar 15 03:51:10 2007







Filter Name: COS Att Stripper







Detected: 
Filter Type: Message Attachment Filter
Event:
at letter.zip(letter.scr):HEADER , " .WILD. *.ade .OR.  .WILD. *.adp .OR.  .WILD. *.asx .OR.  .WILD. *.bas .OR.  .WILD. *.bat .OR.  .WILD. *.bin .OR.  .WILD. *.chm .OR.  .WILD. *.cmd .OR.  .WILD. *.com .OR.  .WILD. *.cpl .OR.  .WILD. *.crt .OR.  .WILD. *.dll .OR.  .WILD. *.exe .OR.  .WILD. *.hiv .OR.  .WILD. *.hlp .OR.  .WILD. *.hta .OR.  .WILD. *.inf .OR.  .WILD. *.ins .OR.  .WILD. *.isp .OR.  .WILD. *.jse .OR.  .WILD. *.jtd .OR.  .WILD. *.lnk .OR.  .WILD. *.msc .OR.  .WILD. *.msi .OR.  .WILD. *.msp .OR.  .WILD. *.mst .OR.  .WILD. *.ocx .OR.  .WILD. *.oft .OR.  .WILD. *.ovl .OR.  .WILD. *.pcd .OR.  .WILD. *.pif .OR.  .WILD. *.pl .OR.  .WILD. *.plx .OR.  .WILD. *.reg .OR.  .WILD. *.scr .OR.  .WILD. *.sct .OR.  .WILD. *.sh .OR.  .WILD. *.shs .OR.  .WILD. *.sys .OR.  .WILD. *.vb .OR.  .WILD. *.vbe .OR.  .WILD. *.vbs" violated
Action on Attachment: STRIP







From drochom at googlemail.com  Sun Mar 18 18:51:36 2007
From: drochom at googlemail.com (drochom)
Date: 18 Mar 2007 15:51:36 -0700
Subject: where function
In-Reply-To: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
References: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
Message-ID: <1174258296.916579.253740@y66g2000hsf.googlegroups.com>

On 18 Mar, 15:19, vorticitywo... at gmail.com wrote:
> Is there a function in Python analogous to the "where" function in
> IDL?
>
> x=[0,1,2,3,4,2,8,9]
> print where(x=2)
>
> output:
> [2,5]

You can try this:

print filter( lambda x: a[x]==2, range(len(a)))

However it's not the best solution...



From inq1ltd at verizon.net  Sat Mar  3 18:13:18 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sat, 03 Mar 2007 18:13:18 -0500
Subject: pop method question
In-Reply-To: <0037D2CD-B88D-4785-B107-F630EBD9788E@gmail.com>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<0037D2CD-B88D-4785-B107-F630EBD9788E@gmail.com>
Message-ID: <200703031813.18781.inq1ltd@verizon.net>

On Saturday 03 March 2007 15:56, Nicholas Parsons 
wrote:
> On Mar 3, 2007, at 3:49 PM, Paul Rubin wrote:
> > Nicholas Parsons <parsons.nicholas1 at gmail.com> 
writes:
> >> I was just playing around in IDLE at the
> >> interactive prompt and typed in dir({}) for
> >> the fun of it.  I was quite surprised to see
> >> a pop method defined there.  I mean is that
> >> a misnomer or what?  From the literature,
> >> pop is supposed to be an operation defined
> >> for a stack data structure.  A stack is
> >> defined to be an "ordered" list data
> >> structure.  Dictionaries in Python have no
> >> order but are sequences. Now, does anyone
> >> know why the python core has this pop method
> >> implemented for a dictionary type?


aDict.pop(theKey)
  'produce the value'

pop removes the  key:value  and produces the value 
as results

jim-on-linux
http:\\www.inqvista.com




> >
> > Try typing:
> >
> >   help({}.pop)
> > --
> > http://mail.python.org/mailman/listinfo/pytho
> >n-list
>
> Thanks, that gives a more details explanation
> of what the behavior is but doesn't answer my
> question above :(


From ajvajv at gmail.com  Sun Mar 18 09:51:28 2007
From: ajvajv at gmail.com (adri80386)
Date: 18 Mar 2007 06:51:28 -0700
Subject: screen size/resolution in win32 in python
Message-ID: <1174225888.752421.56410@l75g2000hse.googlegroups.com>

Hi:

How I can get the current screen resolution settings (screen.width and
screen.heigth in pixels) in python.

Thanks in advance

Adrian



From lobais at gmail.com  Fri Mar  2 18:11:56 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 00:11:56 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de>
Message-ID: <pan.2007.03.02.23.12.08@gmail.com>

Den Fri, 02 Mar 2007 20:33:45 +0100 skrev Diez B. Roggisch:

> Thomas Dybdahl Ahle schrieb:
>> I have a sort function in a python chess program. Currently it looks
>> like this:
>> 
>> def sortMoves (board, table, ply, moves):
>>     f = lambda move: getMoveValue (board, table, ply, move)
>>     moves.sort(key=f, reverse=True)
>>     return moves
>> 
>> However I'd really like not to use the lambda, as it slows down the
>> code.
>> 
>> I've thought about saving the extra variables in the global space, but
>> it really feals ugly.
>> 
>> Do you have any ideas how I can sort these moves the fastest?
> 
> First of all, in your case it is somewhat strange to use
> f = lambda ...
> because then you could as well use
> def f(move):
>    ....

Wouldn't that be just as slow?

> But that is just a general remark. Regarding the question: I don't see
> how that could possibly become faster without much more insight into
> what you are doing in getMoveValue. As it seems, it is dependend of a
> lot of factors that change often, so caching it isn't a real option. And
> I hope you are aware that the key-method is invoked only _once_ per
> list-item!

Yeah, key is a nice thing. My only problem is that I need these other 
objects to generate the value, and I don't want to create a new function 
each time..

In my profiling the functions with the lambda line says 860 cumtime and 
getMoveValue says 580.


From vinjvinj at gmail.com  Tue Mar 13 21:22:50 2007
From: vinjvinj at gmail.com (vj)
Date: 13 Mar 2007 18:22:50 -0700
Subject: Questions on migrating from Numeric/Scipy to Numpy
Message-ID: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>

I've tried to post this to the numpy google group but it seems to be
down. My migration seems to be going well. I currently have one issue
with using scipy_base.insert.

>>> a = zeros(5)
>>> mask = zeros(5)
>>> mask[1] = 1
>>> c = zeros(1)
>>> c[0] = 100
>>> numpy.insert(a, mask, c)
array([ 100.,    0.,  100.,  100.,  100.,    0.,    0.,    0.,
0.,    0.])
>>> a
array([ 0.,  0.,  0.,  0.,  0.])
>>> b
array([0, 0, 0, 0, 0, 0, 0, 0, 0, 1], dtype=int8)
>>> mask
array([ 0.,  1.,  0.,  0.,  0.])
>>> c
array([ 100.])

I would have expected numpy.insert to update a so that the second
element in a would be 100.

Thanks,

VJ



From rune.strand at gmail.com  Thu Mar  8 11:52:48 2007
From: rune.strand at gmail.com (Rune Strand)
Date: 8 Mar 2007 08:52:48 -0800
Subject: Reading a portion of a file
In-Reply-To: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
Message-ID: <1173372768.823896.32710@n33g2000cwc.googlegroups.com>

On Mar 8, 5:12 pm, cmfvulcan... at gmail.com wrote:
> I am using a script with a single file containing all data in multiple
> sections. Each section begins with "#VS:CMD:command:START" and ends
> with "#VS:CMD:command:STOP". There is a blank line in between each
> section. I'm looking for the best way to grab one section at a time.
> Will I have to read the entire file to a string and parse it further
> or is it possible to grab the section directly when doing a read? I'm
> guessing regex is the best possible way. Any help is greatly
> appreciated.

Seems like something along these line will do:

_file_ = "filepart.txt"

begin_tag = '#VS:CMD:command:START'
end_tag = '#VS:CMD:command:STOP'

sections = []
new_section = []
for line in open(_file_):
    line = line.strip()
    if begin_tag in line:
        new_section = []
    elif end_tag in line:
        sections.append(new_section)
    else:
        if line: new_section.append(line)

for s in sections: print s

If your want more control, perhaps flagging "inside_section",
"outside_section" is an idea.




From eurleif at ecritters.biz  Wed Mar 14 13:11:57 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 14 Mar 2007 13:11:57 -0400
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <et958a$o9c$1@news2.u-psud.fr>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
Message-ID: <45f82cdc$0$8966$4d3efbfe@news.sover.net>

Laurent Pointal wrote:
> Both work, you may prefer xrange/iteritems for iteration on large
> collections, you may prefer range/items when processing of the result
> value explicitly need a list (ex. calculate its length) or when you are
> going to manipulate the original container in the loop.

xrange actually supports len():

  >>> len(xrange(10))
  10


From arnodel at googlemail.com  Wed Mar 28 13:18:55 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 28 Mar 2007 10:18:55 -0700
Subject: Why doesnt __getattr__ with decorator dont call __get_method in
	decorator
In-Reply-To: <1hvodh5.h5rkrahq0el8N%aleax@mac.com>
References: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>
	<1hvodh5.h5rkrahq0el8N%aleax@mac.com>
Message-ID: <1175102335.949034.43900@e65g2000hsc.googlegroups.com>

On Mar 28, 3:47 pm, a... at mac.com (Alex Martelli) wrote:
> glomde <tbr... at yahoo.com> wrote:
> > Hi,
>
> > I tried to write a decorator for that should be for methods but for
> > some reasons
> > it doens seem to work when you try to do it on the __getattr__ method
> > in a class.
> > Could anybody give some hints why this is?
> ...
> > a.test # This doesnt call the __get__ !!!
>
> > Output
> > __get__ <__main__.MyClass1 object at 0x4012baac>
> > hello1
> > Traceback (most recent call last):
> >   File "/home/tonib/test.py", line 27, in ?
> >     a.test
> >   File "/home/tonib/test.py", line 12, in __call__
> >     return self.func(self.instance, *args, **kwds)
> > AttributeError: 'decoratorTest' object has no attribute 'instance'
>
> What Python release are you using?  With Python 2.5, your code gives me
> instead:
>
> >>> a.test
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "a.py", line 11, in __call__
>     return self.func(self.instance, *args, **kwds)
> TypeError: __getattr__() takes exactly 2 arguments (3 given)
>
>
>
> so there would seem to be some "mis-alignment" wrt the problems you
> observe...

I get this error with python 2.4 when I do

a.__getattr__('test') # This sets the 'instance' attribute as __get__
is called
a.test # __get__ is not called but 'instance' is set

To get python to run the __get__ method I think you have to call
__getattr__ explicitly:
a.__getattr__('test')

If you do:
a.test
python follows a different routine: it checks for the existence of the
attribute, then check if there is a __getattr__ attribute. Now the
speculative bit: then I conjecture that python assumes that
__getattr__ is a function with two arguments and directly passes them
on to it.  Indeed

type(a).__dict__['__getattr__'](a, 'test')

seems to produce the same errors as a.test, whether the instance
attribute is set or not.
And this explain why there are too many arguments (error message
above).

--
Arnaud



From stj911 at rock.com  Thu Mar 29 18:08:23 2007
From: stj911 at rock.com (stj911 at rock.com)
Date: 29 Mar 2007 15:08:23 -0700
Subject: King Abdullah Saud,
	we are for the first time EXTREMELY PROUD of you. 911 INSIDE JOB has
	finaly WOKEN UP every one - "illegitimate foreign occupation"
In-Reply-To: <1175205127.837146.59020@n59g2000hsh.googlegroups.com>
References: <1175205127.837146.59020@n59g2000hsh.googlegroups.com>
Message-ID: <1175206103.769336.133120@b75g2000hsg.googlegroups.com>

U.S. Officials React to Saudi Condemnation
Abdullah Says Iraq Under "Illigitimate Foreign Occupation" at Arab
Summit
By SANDRA HERNANDEZ Posted 1 hr. 33 min. ago
Riyadh, SAUDI ARABIA: Saudi King Abdullah attends the Arab Summit, 28
March 2007 in Riyadh.
Hassan Amar/AFP/Getty
Riyadh, SAUDI ARABIA: Saudi King Abdullah attends the Arab Summit, 28
March 2007 in Riyadh.

In the latest sign that traditional U.S. ally Saudi Arabia is charting
its own course in the Middle East, King Abdullah condemned the U.S.
presence in Iraq as an "illegitimate foreign occupation" while
speaking at the Arab summit in Riyadh, eliciting restrained reactions
from Washington.

"In beloved Iraq, blood flows between brothers in the shadow of
illegitimate foreign occupation and hateful sectarianism, threatening
a civil war," King Abdullah said in remarks to the Arab League
Thursday, according to Reuters.

A U.S. official called the remarks extraordinary, "given that Riyadh
has officially recognized the Iraqi government and accepted post-
invasion U.N. resolutions regarding Iraq," the Los Angeles Times
reported.

Still, most U.S. officials were at pains to refute the charge without
antagonizing Saudi Arabia, a longtime U.S. ally and its second-largest
oil supplier after Canada.

"When it comes to the coalition forces being in Iraq, we are there
under the U.N. Security Council resolutions and at the invitation of
the Iraqi people," said White House spokeswoman Dana Perino.

Reactions at the State Department were even more conciliatory.
Undersecretary of State Nicholas Burns, testifying before the Senate
Foreign Relations Committee, suggested that King Abdullah's comments
had been misinterpreted or mistranslated and expressed confidence that
the remarks would not upset U.S.-Saudi relations.

"Everyone shares a common interest in seeing an Iraq that is whole and
that is free and that is at peace and prosperous for all Iraqis," said
State Department spokesman Sean McCormack in response to the remarks,
according to Reuters.

King Abdullah's remarks were the latest sign that Saudi Arabia is
taking its own initiative in shaping regional politics, rather than
deferring to U.S. policies. Last February, it hosted talks where
Palestinian President Mahmoud Abbas agreed to work with rival faction
Hamas, which the U.S. lists as a terrorist organization.

And earlier this month, Saudi Arabia hosted Iranian President Mahmoud
Ahmadinejad at a bilateral summit in Riyadh, raising the awkward
prospect of an alliance between the U.S.'s foremost Arab ally and its
strongest antagonist in the region.

A host of topics were discussed in the early rounds of the two-day
summit where King Abdullah made his remarks. Among them was the
standoff between Britain and Iran over the latter's seizure of fifteen
marines in a contested waterway separating Iran and Iraq.

Iran does not belong to the Arab League, a group of 22 mostly Arabic-
speaking nations in the Middle East and North Africa.


On Mar 29, 1:52 pm, lemnit... at india.com wrote:
> As if its worse than a mountain of naked people in the Abu Ghraib or
> Guantanamo style or with secret prisons according to the WASHINGTON
> CONVENTIONS !!!! and she suddenly transmogrified from a UK marine to a
> mother ... Brits are truly hilarious !!!
>
> http://www.wbir.com/news/national/story.aspx?storyid=43780
>
> Tensions rise between Iran, UK, as sailors remain captive
> By: Katie Allison Granju, Producer
>
> LONDON - Britain said Thursday that it would seek United Nations
> condemnation of Iran for taking its 15 Royal Navy crewmembers last
> week, as the dispute over the fate of the crew grew.
> Iran, however, said Britain had mishandled the situation and said it
> would not release Britain's lone female crewmember as it said it would
> because it was increasing international pressure.
>
> Iran's chief negotiator, Ali Larijani, chastised Britain for having
> "an incorrect attitude" and warned that release of any of the captives
> may not be imminent.
>
> Iran's Mehr News Agency reported that the promised release of sailor
> Faye Turney would be suspended. And Larijani, head of Iran's supreme
> national security council, hinted on Iranian state radio that the crew
> could be put on trial, saying, "This case may face a legal path."
>
> Britain insisted that it was not seeking a confrontation over the
> crew, even as the exchange of words and demands between the two
> nations escalated in tit-for-tat fashion.
>
> FIND MORE STORIES IN: Iraq | Iran | Iran | London | Britain | British
> | Tony Blair | Mottaki | Larijani
>
> ON DEADLINE: Iran backs off release
>
> MORE:Iran delays release of female captive
>
> On Wednesday, Iran's foreign minister, Manouchehr Mottaki, had told
> BBC television that Turney would be "released very soon." Mottaki also
> said that Iran would allow British diplomats to visit the crew,
> although he didn't say when.
>
> Iran maintains that the British crew was taken into custody after
> trespassing into its territorial waters in a narrow waterway that
> separates Iran from Iraq. Britain, however, says the crew was
> conducting a routine anti-smuggling inspection of a merchant ship 1.7
> miles inside Iraqi waters when the crewmembers were "ambushed" by
> Iranian gunboats.
>
> The mounting crisis has kept oil prices near six-month highs on
> worries that a prolonged confrontation could disrupt Gulf oil
> supplies. It has exacerbated tensions between Iran and the West, which
> already were high over disputes about Iran's uranium enrichment
> program. Iran says its nuclear program is to generate power. The West
> fears that it could be turned into weapon production.
>
> After failing to gain the crew's release through quiet diplomatic
> channels, the government of British Prime Minister Tony Blair
> ratcheted up the pressure on Iran on Wednesday. It cut off trade and
> travel contact with Iran, made public the satellite coordinates of the
> crew and vowed to bring international pressure on the Iranian
> government.
>
> Larijani said, "British leaders have miscalculated this issue" and
> were making a "fuss" over the dispute.
>
> British newspapers expressed outrage at having the crew paraded before
> television cameras and in response to a letter that Turney allegedly
> wrote to her parents, in which she wrote that the crew had
> "apparently" entered Iran's territorial waters.
>
> "We were out in the boats when we were arrested by Iranian forces as
> we had apparently gone into Iranian waters," the letter, a copy of
> which was sent to The Associated Press, said. "I wish we hadn't
> because then I'd be home with you all right now."
>
> The Daily Mail of London found the TV footage disgusting. "A British
> mother paraded on state TV. Forced to wear the hijab," it blared on
> Page One.
>
> And most editorial writers warned that Iran was severely damaging its
> credibility in the world at a time when it couldn't afford it by
> continuing to insist that the crew had trespassed.
>
> "All it does is isolate Iran further," The Daily Telegraph of London
> wrote. "Enlightened self-interest, as well as simple justice, demands
> the captives' release immediately."
>
> Although the crisis appeared to be spinning out of control, Middle
> East analyst Rosemary Hollis with London's Chatham House international
> think tank said that it still could be resolved without further
> escalation.
>
> The key, she said, is for Britain to focus on the actual dispute over
> the location of the incident and to ensure that the crew is not
> punished for any perceived disagreement over their precise location.
>
> The worst scenario, Hollis said, is to give Iran any cause to turn the
> incident into a wider fight against the United States and the West
> over its nuclear program or allow the crew to be turned into hostages
> that could be swapped.
>
> U.S. forces in Iraq are holding five Iranian officials who were taken
> into custody in January in northern Iraq in an Iranian liaison office.
> The officials had been suspected of having ties aimed at targeting
> Iraqi and coalition forces.
>
> So far, Iran has said the current incident is not linked to any other
> issue.
>
> Contributing: Wire reports




From malaclypse2 at gmail.com  Mon Mar 19 15:56:15 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Mon, 19 Mar 2007 15:56:15 -0400
Subject: Writing files
In-Reply-To: <dIBLh.11554$PL.640@newsread4.news.pas.earthlink.net>
References: <goBLh.129192$_73.83550@newsread2.news.pas.earthlink.net>
	<1174332921.714624.72720@n76g2000hsh.googlegroups.com>
	<dIBLh.11554$PL.640@newsread4.news.pas.earthlink.net>
Message-ID: <16651e80703191256u182d6c00n5f22d63ae5a3116d@mail.gmail.com>

On 3/19/07, Adonis Vargas <adonis at removethisearthlink.net> wrote:
> Actually, I re-ran this in a terminal and it worked perfectly. I was
> using IDLE to write this code, kinda peculiar. Maybe something to do
> with IDLE and CSV (or writing to files) with lines > ~1000. A socket
> timing out maybe?

It's because your file never got closed.  When you ran the script from
the terminal, your file was automatically closed when outCSV was
garbage collected.  When you ran your script in IDLE outCSV was still
a live variable, so it wasn't garbage collected automatically.  Since
you never told it to close the file, there was still data sitting in
the buffer waiting to be written.

-- 
Jerry


From crosseyedpenguin at cox.net  Sun Mar  4 21:18:20 2007
From: crosseyedpenguin at cox.net (Roger)
Date: Sun, 04 Mar 2007 19:18:20 -0700
Subject: Alternatives for Extracting EXIF and JPEG Data from Images
In-Reply-To: <mailman.4661.1173053793.32031.python-list@python.org>
References: <45EB3404.3030401@cox.net>
	<mailman.4661.1173053793.32031.python-list@python.org>
Message-ID: <45EB7DEC.4080702@cox.net>

Max Erickson wrote:
> Roger <crosseyedpenguin at cox.net> wrote:
> 
>> Does anybody have a pointer to a Python library/utility that will
>> extract the chrominance and luminance quantization tables from
>> JPG images? 
>>
>> I have been using the _getexif method from PIL, which works fine,
>> but doesn't extract the quantization data.  I am a bit fuzzy on
>> the terminology, but the quantization data  seems to be JPEG data
>> rather than EXIF data.  One utility that extracts the
>> quantization tables is JPEGsnoop -- there is a link to download
>> the utility here: 
>>    http://www.impulseadventure.com/photo/jpeg-quantization.html
>>
>> The source code for the above isn't available and may not be
>> callable from a Python script even  if it were available.
>>
>> Roger
>>
> 
> I don't know what the format is, etc, but jpegs I open with PIL have a 
> quantization attribute, e.g:
> 
>>>> im.quantization
> {0: array('b', [6, 4, 4, 5, 4, 4, 6, 5, 5, 5, 6, 6, 6, 7, 9, 14, 9, 9, 
> 8, 8, 9, 18, 13, 13, 10, 14, 21, 18, 22, 22, 21, 18, 20, 20, 23, 26, 
> 33, 28, 
> <snip a bunch more numbers>
> 
> 
> max
> 

Thank you, I wasn't aware of the quantization method.  I was unable to 
find any documentation for it.

The 0: array() output would appear to be the luminance 8x8 array and the 
1: array() to be the chrominance 8x8 array.  A curiosity is the values 
disagree with the output of the JPEGsnoop utility.  For my Canon 
Powershot S2 IS set to "fine", im.quantization yields (after formatting):

{0: array('b', [
1, 1, 1, 2, 1, 1, 2, 2,
2, 2, 3, 2, 2, 3, 3, 6,
4, 3, 3, 3, 3, 7, 5, 8,
4, 6, 8, 8, 10, 9, 8, 7,
11, 8, 10, 14, 13, 11, 10, 10,
12, 10, 8, 8, 11, 16, 12, 12,
13, 15, 15, 15, 15, 9, 11, 16,
17, 15, 14, 17, 13, 14, 14, 14
]),

1: array('b', [
4, 4, 4, 5, 4, 5, 9, 5,
5, 9, 15, 10, 8, 10, 15, 26,
19, 9, 9, 19, 26, 26, 26, 26,
13, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26,
26, 26, 26, 26, 26, 26, 26, 26])}

The JPEGsnoop output for the same jpg file is (pardon the line wrap):

   Precision=0 bits
   Destination ID=0 (Luminance)
     DQT, Row #0:   1   1   1   2   3   6   8  10  AnnexRatio:  16.0 
11.0  10.0   8.0   8.0   6.7   6.4   6.1
     DQT, Row #1:   1   1   2   3   4   8   9   8  AnnexRatio:  12.0 
12.0   7.0   6.3   6.5   7.3   6.7   6.9
     DQT, Row #2:   2   2   2   3   6   8  10   8  AnnexRatio:   7.0 
6.5   8.0   8.0   6.7   7.1   6.9   7.0
     DQT, Row #3:   2   2   3   4   7  12  11   9  AnnexRatio:   7.0 
8.5   7.3   7.3   7.3   7.3   7.3   6.9
     DQT, Row #4:   3   3   8  11  10  16  15  11  AnnexRatio:   6.0 
7.3   4.6   5.1   6.8   6.8   6.9   7.0
     DQT, Row #5:   3   5   8  10  12  15  16  13  AnnexRatio:   8.0 
7.0   6.9   6.4   6.8   6.9   7.1   7.1
     DQT, Row #6:   7  10  11  12  15  17  17  14  AnnexRatio:   7.0 
6.4   7.1   7.3   6.9   7.1   7.1   7.2
     DQT, Row #7:  14  13  13  15  15  14  14  14  AnnexRatio:   5.1 
7.1   7.3   6.5   7.5   7.1   7.4   7.1
     Approx quality factor = 92.96 (scaling=14.08 variance=5.28)
   ----
   Precision=0 bits
   Destination ID=1 (Chrominance)
     DQT, Row #0:   4   4   5   9  15  26  26  26  AnnexRatio:   4.3 
4.5   4.8   5.2   6.6   3.8   3.8   3.8
     DQT, Row #1:   4   4   5  10  19  26  26  26  AnnexRatio:   4.5 
5.3   5.2   6.6   5.2   3.8   3.8   3.8
     DQT, Row #2:   5   5   8   9  26  26  26  26  AnnexRatio:   4.8 
5.2   7.0  11.0   3.8   3.8   3.8   3.8
     DQT, Row #3:   9  10   9  13  26  26  26  26  AnnexRatio:   5.2 
6.6  11.0   7.6   3.8   3.8   3.8   3.8
     DQT, Row #4:  15  19  26  26  26  26  26  26  AnnexRatio:   6.6 
5.2   3.8   3.8   3.8   3.8   3.8   3.8
     DQT, Row #5:  26  26  26  26  26  26  26  26  AnnexRatio:   3.8 
3.8   3.8   3.8   3.8   3.8   3.8   3.8
     DQT, Row #6:  26  26  26  26  26  26  26  26  AnnexRatio:   3.8 
3.8   3.8   3.8   3.8   3.8   3.8   3.8
     DQT, Row #7:  26  26  26  26  26  26  26  26  AnnexRatio:   3.8 
3.8   3.8   3.8   3.8   3.8   3.8   3.8
     Approx quality factor = 88.24 (scaling=23.52 variance=21.42)

I don't understand the "AnnexRatio" data JPEGsnoop is adding to each 
row.  Anyone have an explanation on how to translate the im.quantization 
values to the JPEGsnoop values?  Or am I looking at two different types 
of "quantization" tables?

Roger


From seberino at spawar.navy.mil  Tue Mar 13 16:54:22 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 13 Mar 2007 13:54:22 -0700
Subject: help!! *extra* tricky web page to extract data from...
Message-ID: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>

How extract the visible numerical data from this Microsoft financial
web site?

http://tinyurl.com/yw2w4h

If you simply download the HTML file you'll see the data is *not*
embedded in it but loaded from some other file.

Surely if I can see the data in my browser I can grab it somehow right
in a Python script?

Any help greatly appreciated.

Sincerely,

Chris



From Kevin.Smith at sas.com  Fri Mar 30 19:21:53 2007
From: Kevin.Smith at sas.com (Kevin D. Smith)
Date: Fri, 30 Mar 2007 17:21:53 -0600
Subject: Py_DECREF/Py_INCREF as Functions?
Message-ID: <euk62h$qha$1@foggy.unx.sas.com>

I'm trying to use Python from another application that allows me to 
load functions from a DLL.  While I have most of the API working, I 
have one big problem: Py_DECREF and PyINCREF are macros which I can't 
load from the Python DLL.  Since I can't decref any objects, I'm 
leaking memory all over the place.  Is there any way to decref an 
object with a function that can be loaded from the Python DLL?

-- 
Kevin D. Smith



From hg at nospam.org  Fri Mar 30 06:09:02 2007
From: hg at nospam.org (hg)
Date: Fri, 30 Mar 2007 12:09:02 +0200
Subject: Islam, the Religion of Ease
References: <1175178981.676137.156340@n59g2000hsh.googlegroups.com>
	<1175270653.284511.3820@l77g2000hsb.googlegroups.com>
Message-ID: <2ubPh.257454$BK1.244465@newsfe13.lga>

adrian.villanustre at gmail.com wrote:

> On Mar 29, 11:36 am, "moslim" <lovelyd... at hotmail.com> wrote:
>> Excuse me!!
>> Would you stop for a moment?!
>> O...man...Haven't you thought-one day- about yourself ?
>> Who has made it?
>> Have you seen a design which hasn't a designer ?!
>> Have you seen a wonderful,delicate work without a worker ?!
>> It's you and the whole universe!..
>> Who has made them all ?!!
>> You know who ?.. It's "ALLAH",prise be to him.
>> Just think for a moment.
>> How are you going to be after death ?!
>> Can you believe that this exact system of the universe and all of
>> these great creation will end in in nothing...just after death!
>> Have you thought, for a second, How to save your soul from Allah's
>> punishment?!
>> Haven't you thought about what is the right religion?!
>> Read ... and think deeply before you answer..
>> It is religion of Islam.
>> It is the religion that Mohammad-peace upon him- the last prophet, had
>> been sent by.
>> It is the religion that the right Bible- which is not distorted-has
>> preached.
>> Just have a look at The Bible of (Bernaba).
>> Don't be emstional.
>> Be rational and judge..
>> Just look..listen...compare..and then judge and say your word.
>> We advise you visiting
>> :http://www.islam-guide.comhttp://www.thetruereligion.orghttp://www.beconvinced.comhttp://www.plaintruth.orghttp://english.islamway.comhttp://www.todayislam.comhttp://www.prophetmuhammed.orghttp://www.islamtoday.net/english/http://www.islamunveiled.orghttp://www.islamic-knowledge.com
>>
>> We willingly recive any inquries at the e-mail :
>>
>> musl... at hotmail.com
> 
> Respectofully:
> 
> 1.- Use the right place for your propaganda.
> 2.- Stop with religions, and militarism !!!!
> 3.- Free the World of religious and Militars and you will get the
> Peace for everybody  !!!!
> 4.- Use your time for usefull matters
> 
> Regards
> 
> Adrian



I don't know ... maybe 'M' python can bring _real_ facts to the
discussion ... guiddo would not mind I gather

http://video.google.com/videoplay?docid=-2002541459944162494
http://www.youtube.com/watch?v=xrShK-NVMIU
http://www.mtholyoke.edu/~ebarnes/python/python.htm

I swore (holly s.... ) I'd never follow up on any of those guys ... but then
again, one can never trust an atheist.

hg













From hg at nospam.org  Sat Mar 10 05:58:06 2007
From: hg at nospam.org (hg)
Date: Sat, 10 Mar 2007 11:58:06 +0100
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<1173548863.033277.223420@v33g2000cwv.googlegroups.com>
Message-ID: <3kCIh.324910$IL1.184956@newsfe13.lga>

Dan Bishop wrote:

> On Mar 10, 11:32 am, "Jack" <nos... at invalid.com> wrote:
>> This is a naive question:
>>
>> "%u" % -3
>>
>> I expect it to print 3. But it still print -3.
>>
>> Also, if I have an int, I can convert it to unsigned int in C:
>>    int i = -3;
>>    int ui = (unsigned int)i;
>>
>> Is there a way to do this in Python?
> 
> def unsigned(n):
>     return n & 0xFFFFFFFF


or abs(-1) ?




From altudela at yahoo.com  Tue Mar 20 15:21:06 2007
From: altudela at yahoo.com (Alejandro)
Date: 20 Mar 2007 12:21:06 -0700
Subject: making objects with individual attributes!
In-Reply-To: <56agb9F288cqgU1@mid.uni-berlin.de>
References: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>
	<56agb9F288cqgU1@mid.uni-berlin.de>
Message-ID: <1174418465.972421.63860@l75g2000hse.googlegroups.com>

Thanks to all!!! Now it works!



From lbates at websafe.com  Thu Mar 15 11:30:20 2007
From: lbates at websafe.com (Larry Bates)
Date: Thu, 15 Mar 2007 10:30:20 -0500
Subject: Pickle Problem
In-Reply-To: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
Message-ID: <45F9668C.1070606@websafe.com>

tonyr1988 wrote:
> I'm a complete python n00b writing my first program (or attempting to,
> anyway). I'm trying to make the transition from Java, so if you could
> help me, it would be greatly appreciated. Here's the code I'm stuck on
> (It's very basic):
> 
> class DemoClass:
> 	def __init__(self):
> 		self.title = ["Hello", "Goodbye"]
> 
> 	def WriteToFile(self, path = "test.txt"):
> 		fw = file(path, "w")
> 		pickle.dump(self.title, fw)
> 		fw.close()
> 
> if __name__=='__main__':
> 	x = DemoClass
> 	x.WriteToFile
> 
> It doesn't do any file I/O at all (that I see). I hope my syntax is
> alright. If I just call WriteToFile, shouldn't it perform with the
> default path? It gives me no errors and pretends to execute just fine.
> 
Just a couple of "issues" that can be fixed as follows:

import pickle

class DemoClass:
	def __init__(self):
		self.title = ["Hello", "Goodbye"]

	def WriteToFile(self, path):
		fw = file(path, "w")
		pickle.dump(self.title, fw)
		fw.close()

if __name__=='__main__':
    path='\\test.txt'
    x = DemoClass()
    x.WriteToFile(path)

Notes:

1) You have to call (follow by parenthesis) DemoClass() to get an instance.
   What you got was a pointer (x) to the DemoClass not an instance of
   DemoClass.

2) Same for WriteToFile()

3) Probably best to move the path to main and always pass it into
   WriteToFile.

-Larry


From tjreedy at udel.edu  Fri Mar  9 16:57:51 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 Mar 2007 16:57:51 -0500
Subject: How to Start a (thread?) and Leave
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com><1173471925.876213.170820@j27g2000cwj.googlegroups.com>
	<1173472226.698504.147260@h3g2000cwc.googlegroups.com>
Message-ID: <essl8t$mqf$1@sea.gmane.org>


<gregpinero at gmail.com> wrote in message 
news:1173472226.698504.147260 at h3g2000cwc.googlegroups.com...
| On Mar 9, 3:25 pm, "abcd" <codecr... at gmail.com> wrote:
| > probably a Thread.
|
|
| But a thread leaves the script running until the thread exits, right?
| So the webpage would just keep saying "loading" at the bottom I think.

Can you tell the page to auto-refresh itself every 15 seconds or so?  I 
have seen this as a user but don't know if it is special html code or 
javascript or java or what.

tjr





From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 18:05:11 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 00:05:11 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <mailman.4773.1173305526.32031.python-list@python.org>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>	<45EF260C.6000205@websafe.com>	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
	<mailman.4773.1173305526.32031.python-list@python.org>
Message-ID: <45ef3d1d$0$18249$426a34cc@news.free.fr>

Gabriel Genellina a ?crit :
> En Wed, 07 Mar 2007 18:48:18 -0300, Arnaud Delobelle  
> <arnodel at googlemail.com> escribi?:
> 
>> for f in int, float, complex:
>>     try:
>>         return f(x)
>>     except ValueError:
>>         continue
>> raise CantDoIt
>>
>> But if the three things I want to do are not callable objects but
>> chunks of code this method is awkward because you have to create
>> functions simply in order to be able to loop over them (this is whay I
>> was talking about 'abusing loop constructs').  Besides I am not happy
>> with the other two idioms I can think of.
> 
> 
> Hmmm, functions are cheap 

To define. You pay the price when you call them !-)

(sorry, couldn't resist - I otherwise totally agree with you)



From skip at pobox.com  Sun Mar  4 12:51:10 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 4 Mar 2007 11:51:10 -0600
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
Message-ID: <17899.1806.499082.569314@montanaro.dyndns.org>


    John> If a Python build needs all that, something in ./configure should
    John> be checking for each of those.  After all, that's what ./configure
    John> is supposed to be for.  It looks like a Python install will plow
    John> ahead without ncurses-devel, and install a dud version.

As another person pointed out, you're conflating Python proper with a
specific Linux distribution's packaging techniques.  I run on a Mac and use
MacPorts.  There is no ncurses-devel package there, just ncurses and
ncursesw.  Building a Python interpreter doesn't require ncurses.  It's an
add-on module which happens to be distributed with Python.  The distutils
setup.py script checks for ncurses bits and indeed "plows ahead" if it's not
found.  Not all systems (Windows, in particular) have ncurses.

Skip


From aboudouvas at panafonet.gr  Mon Mar 19 15:21:34 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 19 Mar 2007 12:21:34 -0700
Subject: PythonCard thoughts
In-Reply-To: <1174329032.236378.161150@e65g2000hsc.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
	<1174329032.236378.161150@e65g2000hsc.googlegroups.com>
Message-ID: <1174332094.908333.173920@l75g2000hse.googlegroups.com>


?/? John Henry ??????:
> (If I understand your question correctly)
>
> There is no restirction on what you call your objects.  For instance,
> I do call all of my buttons btnSomeThing, and so forth.

No, i surely didn't mean this! What i mean is that the creation of
these components happens to NOT reside in the .py file that we are use
to put our logic in, so, the various Editors/Plug-ins cannot
"understand" what type is the object we refer to so they cannot
provide intellisense information.

Let' say for example, that we create a design in PythonCard that
contains a form and just one butto named btnStart. In our .py file we
want to refre to that button in a way such:
self.components.btnStart

At this point, if we had the code that created this button in our
file, PyDev (for example) would show us the properties of btnStart
because it has understood that we are using a wx.Button.

This is not the case of thePython card because this creation is
happened to runtime by...PythonCard!

Anyway, it is not that important from keeping me from using
PythonCard.

Do we know more things about the developing of this product, is it
active/dead or something ??
I plan to use it to create something that will take a long time to
finish and i wouldn't want to find out that the product is a dead-
end...



From stanc at al.com.au  Fri Mar 16 02:27:11 2007
From: stanc at al.com.au (Astan Chee)
Date: Fri, 16 Mar 2007 17:27:11 +1100
Subject: getting local system information with python
Message-ID: <45FA38BF.1050302@al.com.au>

Hi,
I have a python script and I want to check what operating system it is 
on and what the current local machine name is.
How do I do it with python?
Thanks!
Astan


From fatkwanyui at gmail.com  Sun Mar 18 09:20:26 2007
From: fatkwanyui at gmail.com (Karl)
Date: 18 Mar 2007 06:20:26 -0700
Subject: [Help]UnicodeDecodeError
Message-ID: <1174224026.501145.19360@y66g2000hsf.googlegroups.com>

error msg:
Mod_python error: "PythonHandler mod_python.publisher"

Traceback (most recent call last):

  File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line
299, in HandlerDispatch
    result = object(req)

  File "/usr/lib/python2.3/site-packages/mod_python/publisher.py",
line 136, in handler
    result = util.apply_fs_data(object, req.form, req=req)

  File "/usr/lib/python2.3/site-packages/mod_python/util.py", line
361, in apply_fs_data
    return object(**args)

  File "/var/www/html/sky.py", line 38, in main
    sresult = sresult.decode('zh-hk').encode('utf_8')

UnicodeDecodeError: 'big5hkscs' codec can't decode bytes in position
958-959: illegal multibyte sequence


Wt can I do, since there is some characters, is there any solutions to
solve it???

thx



From exarkun at divmod.com  Thu Mar 29 13:15:01 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 29 Mar 2007 12:15:01 -0500
Subject: with timeout(...):
In-Reply-To: <slrnf0nodg.u8v.nick@irishsea.home.craig-wood.com>
Message-ID: <20070329171501.18920.154549528.divmod.quotient.6442@ohm>

On Thu, 29 Mar 2007 11:30:04 -0500, Nick Craig-Wood <nick at craig-wood.com> wrote:
>Diez B. Roggisch <deets at nospam.web.de> wrote:
>> >
>> > I beleive the convention is when calling an OS function which might
>> > block the global interpreter lock is dropped, thus allowing other
>> > python bytecode to run.
>>
>>
>>  So what? That doesn't help you, as you are single-threaded here. The
>>  released lock won't prevent the called C-code from taking as long as it
>>  wants. |And there is nothing you can do about that.
>
>I'm assuming that the timeout function is running in a thread...

What does it do when the timeout expires?  How does it interrupt recv(2)
or write(2) or `for (int i = 0; i < (unsigned)-1; ++i);'?

This is what we're talking about, right?

Jean-Paul


From mahs at telcopartners.com  Wed Mar  7 19:55:57 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 07 Mar 2007 16:55:57 -0800
Subject: Flatten a two-level list --> one liner?
In-Reply-To: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>
References: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>
Message-ID: <esnmuv$u7$1@sea.gmane.org>

Sergio Correia wrote:
> spam = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]
> 
> Into something like
> eggs = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> There are *no* special cases (no empty sub-lists).
eggs = [i for j in spam for i in j]

Michael



From piet at cs.uu.nl  Wed Mar 21 11:54:59 2007
From: piet at cs.uu.nl (Piet van Oostrum)
Date: Wed, 21 Mar 2007 16:54:59 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174488447.404840.112960@n76g2000hsh.googlegroups.com>
	<1174488908.420851.303850@y66g2000hsf.googlegroups.com>
Message-ID: <m28xdqr3qk.fsf@cochabamba.cs.uu.nl>

>>>>> "dmitrey" <openopt at ukr.net> (d) wrote:

>d> I think it should result
>d> result = func1(func2, arg)
>d> if you want
>d> result = func1(func2(arg))
>d> you should use
>d> result = func1 (func2 arg)
>d> if
>d> ... = word1 word2 word3 ...
>d> then only word "word1" should be call to func "word1" with parameters
>d> word2, word3 etc

That depends whether you want function application to be left-associative
or right-associative. For example, in haskell it is left associative which
is the more obvious choice because it has currying.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4]
Private email: piet at vanoostrum.org


From deets at nospam.web.de  Thu Mar  1 14:07:09 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 Mar 2007 20:07:09 +0100
Subject: xml minidom redundant children??
In-Reply-To: <1172774813.293437.108250@v33g2000cwv.googlegroups.com>
References: <1172774813.293437.108250@v33g2000cwv.googlegroups.com>
Message-ID: <54omjoF21oduuU1@mid.uni-berlin.de>

bkamrani at gmail.com schrieb:
> Great guys:
> 
> As a newbie, I'm trying to simply parse a xml file using minidom, but
> I don't know why I get some extra children(?). I don't know what is
> wrong in xml file, but I've tried different xml files, still same
> problem.
> 
> ******************************************************************************
>            xml file (fileTest) looks like:
> <?xml version="1.0" encoding="ISO-8859-1" ?>
> <afc xmlns="http://python.org/:aaa" xmlns:afc="http://
> python.org/:foo">
> <afc:Bibliography>
>    <File version="2.0.0.0" publicationDate="2007-02-16
> 11:23:06+01:00" />
>    <Revision version="2" />
>    <Application version="02.00.00" />
> </afc:Bibliography>
> </afc>
> ******************************************************************************
>             Python file looks like:
> from xml.dom import minidom
> doc = minidom.parse(fileTest)
> a= doc.documentElement.childNodes
> print a
> print '--------------'
> for item in a:
>     print item.nodeName
> ******************************************************************************
>              And output is:
> [<DOM Text node "\n">, <DOM Element: afc:Bibliography at 12082960>,
> <DOM Text node "\n">]
> --------------
> #text
> afc:Bibliography
> #text
> ******************************************************************************
> 
> My question is why this <DOM Text node "\n"> or  #text has been
> created and how to get rid of them by changing python code? (here I'm
> not interested to change xml file.)
> 
> Have search the forum without finding any solution :-(

You can't get rid of them by itself - xml.minidom can't possibly know if 
whitespace is of any significance for you or not.

There are several ways to deal with this. If you have to stay in 
minidom, just loop over the children and discard all whitespace-only 
text-nodes, before really processing the document.

But the better alternative would be to use a better API for processing 
XML. Use one of the several ElementTree implementations, such as lxml:

http://codespeak.net/lxml/

This will not rid you of the whitespace itself, but represents text 
differently so that you can focus on elements without intespersed 
text-nodes.

Diez


From jon+usenet at unequivocal.co.uk  Sun Mar 11 06:55:15 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 11 Mar 2007 10:55:15 GMT
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
	<2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>
	<slrnev6nob.oj9.jon+usenet@snowy.squish.net>
	<mailman.4930.1173605398.32031.python-list@python.org>
Message-ID: <slrnev7o0j.ejv.jon+usenet@snowy.squish.net>

In article <mailman.4930.1173605398.32031.python-list at python.org>, Gabriel Genellina wrote:
>> I don't know, but stock Python 2.5 seems to stick mysterious '.egg'
>> files in the site-packages directory when you install things.
> 
> Which "stock" Python? Not the one from www.python.org...

Yes, the one from www.python.org.


From thorsten at thorstenkampe.de  Thu Mar 29 16:07:27 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Thu, 29 Mar 2007 21:07:27 +0100
Subject: How can I get the content of a web site using http library
References: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
Message-ID: <MPG.20762cd6f9219cf99896a0@news.individual.de>

* silverburgh.meryl at gmail.com (29 Mar 2007 12:18:19 -0700)
> I am trying to get the content of a web site like this:
> But my question is how can I do a 'GET' request without putting the '/
> index.html''

import urllib
print urllib.urlopen('http://www.yahoo.com/').read()


From cfbolz at gmx.de  Wed Mar 28 17:24:53 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 23:24:53 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175111519.550674.160720@n59g2000hsh.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175111519.550674.160720@n59g2000hsh.googlegroups.com>
Message-ID: <460ADD25.5050008@gmx.de>

Hi!

dmitrey wrote:
> Hi!
> Suppose I have a py-written module.
> Is it possible somehow run PyPy on the whole module?
> I didn't find it in documentation.
> And if yes (or if just run in every module func) what will be after
> computer restart?
> Should I restart  PyPy on the module once again?
> And are there any chances/intends for  PyPy to be included into Python
> core?

PyPy contains a full Python interpreter (which can include a JIT 
compiler) and thus replaces the "Python core". PyPy can never really be 
integrated into CPython.

Cheers,

Carl Friedrich Bolz



From sergio.correia at gmail.com  Wed Mar  7 19:14:43 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 7 Mar 2007 19:14:43 -0500
Subject: Flatten a two-level list --> one liner?
Message-ID: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>

Hi,

I'm looking for an easy way to flatten a two level list like this

spam = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]

Into something like
eggs = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

There are *no* special cases (no empty sub-lists).

I have found two ways:

1) Accumulator
eggs = []
for x in eggs:
       eggs.extend(x)

2) Reduce
eggs = reduce(lambda x, y: x+y, spam)

I feel the 1st way is too cumbersome (three lines), and although I
like the 2nd way (except for the lambda part), I understand reduce is
discouraged by Guido so I want to know if there is a "Better Way"(TM)
?

Any ideas?

Thanks,
Sergio

PS: Why does `sum` works only with numbers?


From davels at telus.net  Fri Mar 16 18:38:14 2007
From: davels at telus.net (davels at telus.net)
Date: 16 Mar 2007 15:38:14 -0700
Subject: Can Epydoc be used to parse eggs
Message-ID: <1174084694.348500.258870@d57g2000hsg.googlegroups.com>

I'm trying to use epydoc (3.0beta1) to generate documentation for some
packages I've installed as eggs.  When I run the epydoc command
"epydoc.py -v -o sqlalchemy sqlalchemy" in completes without error,
but the resulting documentation is just a stub.

Everything
All Functions
    sqlalchemy.global_connect
All Variables
    sqlalchemy.EXT_PASS
    sqlalchemy.NULLTYPE
    sqlalchemy.__loader__
    sqlalchemy.default_metadata
    sqlalchemy.func

It looks like the zip loader module that is used to access the egg is
what is documented.  Is there any way to get epydoc to open the egg
and document the package?

Thanks.

--
DaveS



From robert.kern at gmail.com  Tue Mar 27 13:36:39 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 27 Mar 2007 12:36:39 -0500
Subject: Numeric Soup
In-Reply-To: <1175016454.685648.218030@y66g2000hsf.googlegroups.com>
References: <46094afe$1@nntp.zianet.com>
	<1175016454.685648.218030@y66g2000hsf.googlegroups.com>
Message-ID: <eubkne$4b9$2@sea.gmane.org>

Ene wrote:
> As it stands Matplotlib does not
> support numpy (thus my suggestion to install two of the three - my
> choice: numarray + numpy)

matplotlib certainly supports numpy.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From bj_666 at gmx.net  Wed Mar 14 18:28:01 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 14 Mar 2007 23:28:01 +0100
Subject: most complete xml package for Python?
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
	<1173908076.351577.75000@n59g2000hsh.googlegroups.com>
	<1173909884.822838.264030@n76g2000hsh.googlegroups.com>
Message-ID: <pan.2007.03.14.22.28.00.498313@gmx.net>

In <1173909884.822838.264030 at n76g2000hsh.googlegroups.com>, metaperl
wrote:

> Well, I'm not a troll. And I am now even less impressed with
> ElementTree. It does not preserve the document but reforms it in
> certain cases.
> 
> <script></script>
> 
> gets rewritten as
> 
> <script />
> 
> which leads to problems when embedding Dojo Rich Text Editors.

So those editors have some problem with XML.  I'm not impressed
by such code.  ;-)

It's like complaining about:

In [100]: '\x61'
Out[100]: 'a'

It's the same information, just a different representation.  Both are
within the specs.

Ciao,
	Marc 'BlackJack' Rintsch


From dcramer at gmail.com  Sun Mar 11 05:26:33 2007
From: dcramer at gmail.com (David Cramer)
Date: 11 Mar 2007 01:26:33 -0800
Subject: Python in a desktop environment
In-Reply-To: <1173595945.530722.273030@30g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
Message-ID: <1173605193.585675.217210@30g2000cwc.googlegroups.com>

On Mar 10, 10:52 pm, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com>
wrote:
> David Cramer wrote:
> > If you had an application that you were about to begin development on
> > which you wanted to be cross platform (at least Mac and Windows),
> > would you suggest using c++ and Python?
>
> I'd strongly consider a pure python solution (I'd choose wxpython),
> but if I needed to code backend stuff in a lower level language I'd
> use C rather than C++.

Well we want it to be very robust, and python isn't exactly the
fastest language, or one with the lowest overhead :)



From joncle at googlemail.com  Fri Mar 16 05:08:20 2007
From: joncle at googlemail.com (Jon Clements)
Date: 16 Mar 2007 02:08:20 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <1174035726.525608.3340@e1g2000hsg.googlegroups.com>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
	<1174035726.525608.3340@e1g2000hsg.googlegroups.com>
Message-ID: <1174036100.468116.60780@l77g2000hsb.googlegroups.com>

On 16 Mar, 09:02, "Jon Clements" <jon... at googlemail.com> wrote:
> On 16 Mar, 03:56, "hiro" <Nun... at gmail.com> wrote:
>
>
>
>
>
> > Hi there,
>
> > I'm very new to python, the problem I need to solve is whats the "best/
> > simplest/cleanest" way to read in multiple files (ascii), do stuff to
> > them, and write them out(ascii).
>
> > --
> > import os
>
> > filePath = ('O:/spam/eggs/')
> > for file in os.listdir(filePath):   #straight from docs
> >     # iterate the function through all the files in the directory
> >     # write results to separate files  <- this is where I'm mostly
> > stuck.
>
> > --
> > For clarity's sake, the file naming conventions for the files I'm
> > reading from are file.1.txt -> file.nth.txt
>
> > It's been a long day, i'm at my wits end, so I apologize in advance if
> > I'm not making much sense here.
> > syntax would also be great if you can share some recipes.
>
> I'd try the glob module.
>
> [code]
> import glob
>
> # Get a list of filenames matching wildcard criteria
> # (note that path is relative to working directory of program)
> matching_file_list = glob.glob('O:/spam/eggs/*.txt')
>
> # For each file that matches, open it and process it in some way...
> for filename in matching_file_list:
>     infile = file(filename)
>     outfile = file(filename + '.out','w')
>     # Process the input file line by line...
>     for line in infile:
>         pass # Do something more useful here, change line and write to
> outfile?
>     # Be explicit with file closures
>     outfile.close()
>     infile.close()
> [/code]
>
> Of course, you can change the wild card criteria in the glob
> statement, and also then filter further using regular expressions to
> choose only files matching more specific criteria. This should be
> enough to get you started though.
>
> hth
>
> Jon.- Hide quoted text -
>
> - Show quoted text -

Okies; postcoding before finishing your early morning coffee is not
the greatest of ideas!

I forgot to mention that glob will return pathnames as well. You'll
need to check that os.path.isfile(filename) returns True before
processing it...

Jon.



From esj at harvee.org  Sun Mar 25 23:47:56 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Sun, 25 Mar 2007 23:47:56 -0400
Subject: organizing collections of small modules
In-Reply-To: <878xdl5ia9.fsf@gmail.com>
References: <mailman.5586.1174841115.32031.python-list@python.org>
	<878xdl5ia9.fsf@gmail.com>
Message-ID: <eu7fpn$b38$1@sea.gmane.org>

Jorge Godoy wrote:
> "Eric S. Johansson" <esj at harvee.org> writes:
> 
>> I have a bunch of small modules that I use within my application.  Most of
>> these modules are single file modules.  Currently, I have them set up as
>> stand-alone modules but because it's a royal pain to fetch five or 10 of these
>> modules for each application and tracking whether or not they are all up to
>> date, I'm considering putting them all into one collection (rcsoc
>> a.k.a. random cross-section of code[1]) so it's easier to load, install, and
>> manage.
>>
>> Are there better techniques for managing collections of modules in 2.4 or
>> later?
>>
>> ---eric
>>
>>
>> [1]  derives from the expression that hamburger is "random cross-section of
>> cow"
> 
> I'm using setuptools for that.  If they're somehow connected --
> e.g. mathematics, database, finance, etc. -- then I create one single package
> for them.  If they aren't, then creating several packages isn't hard.

I already have working setup.py files and the docs indicates that it 
should be a 1 liner to convert from distutils.

> If they are useful enough you can publish them on PyPI and then it is just a
> matter of "easy_install" them.  If they aren't then you'll have to collect
> them somewhere to use easy_install ;-)

I think a couple should be generaly useful (file system based queue, 
union configuration files).  when it all works, I'll publish.

> 
> It also supplies means to determine the minimum / maximum / exact version that
> is required, so this also helps with how up-to-date your library has to be to
> be used with some application.

a big win IMO



From mccredie at gmail.com  Thu Mar  8 15:01:41 2007
From: mccredie at gmail.com (Matimus)
Date: 8 Mar 2007 12:01:41 -0800
Subject: Where to "import"?
In-Reply-To: <1173379952.901004@iceman.esoterica.pt>
References: <1173379952.901004@iceman.esoterica.pt>
Message-ID: <1173384101.124671.305200@h3g2000cwc.googlegroups.com>

> both using os module where should I put the "import os"? In both files?

You don't really have a choice, you have to import os in both files.
Python will only load the os module into memory once, but the import
statements are needed to add the os module to the c and m module
namespaces. The code in c.py cannot 'see' the code in m.py, even if it
was imported by m.py. The import command is not like #include in C, it
is not a code dump.

-m



From aleax at mac.com  Wed Mar 21 22:06:56 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 21 Mar 2007 19:06:56 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<7WjMh.318$YL5.80@newssvr29.news.prodigy.net>
Message-ID: <1hvcadb.134pbvp1y39wi3N%aleax@mac.com>

John Nagle <nagle at animats.com> wrote:

> Marcin Ciura wrote:
> 
> > Neither would I. I must have expressed myself not clearly enough.
> > Currently
> > x = y = z
> > is roughly equivalent to
> > x = z
> > y = z
> > I propose to change it to
> > y = z
> > x = z
> 
> Actually, it is equivalent to
> 
>       y = z
>       x = y

Not really:

>>> class chatty(object):
...   def __init__(self): self.__dict__['__hide'] = {}
...   def __setattr__(self, name, value):
...     print 'sa', name, value
...     self.__dict__['__hide'][name] = value
...   def __getattr__(self, name):
...     print 'ga', name
...     return self.__dict__['__hide'].get(name)
... 
>>> c = chatty()
>>> x = c.zop = 23
sa zop 23
>>>

As you can see, there is no read-access to c.zop, which plays the role
of y there.


Alex


From bgporter at acm.org  Tue Mar 13 17:50:26 2007
From: bgporter at acm.org (Brett g Porter)
Date: Tue, 13 Mar 2007 17:50:26 -0400
Subject: Eureka moments in Python
In-Reply-To: <1173808089.361229.89350@n33g2000cwc.googlegroups.com>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>	<mailman.5019.1173798317.32031.python-list@python.org>
	<1173808089.361229.89350@n33g2000cwc.googlegroups.com>
Message-ID: <45F71CA2.8050106@acm.org>

Dustan wrote:
> On Mar 13, 10:05 am, Brett g Porter <bgpor... at acm.org> wrote:
>> Steven D'Aprano wrote:
>>> I'd be interested in hearing people's stories of Eureka moments in Python,
>>> moments where you suddenly realise that some task which seemed like it
>>> would be hard work was easy with Python.
>> Mine was definitely when I was first working with the xmlrpc module, and
>> I was puzzled to no end how it was that I was able to make a call to a
>> method of an object when that method didn't exist. All the talk about
>> Python being a dynamic language had bounced off of me until that moment,
>> when I walked through the __getattr__ method in the debugger and was
>> enlightened.
>>
>> Not surprisingly, that was also the moment when C++ started feeling like
>> a straightjacket to me...
> 
> Started? Meaning there was a time when it DIDN'T feel like a
> straightjacket? If I were a journalist, this would be all over the
> news...
> 

If you're born wearing a straightjacket, I'm sure that it feels natural 
and fine until the first time someone unties it...



From psdasilvaX at esotericaX.ptX  Tue Mar 13 14:20:59 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Tue, 13 Mar 2007 18:20:59 +0000
Subject: Tools for GUI/graphics
Message-ID: <1173810046.6562@jubilee.claranet.pt>

I need to make some data representation.
Basically a major window for a 2D chart,
a scrollable window with some few small 2D
graphics. The rest is a normal form with
buttons, labels and entries.

I thought of doing that using Tkinter+pmw+blt.
But now I'm considering use a web solution.
Is there anything that make this stuff easy?
I'm not searching for professional look. This
is for my personal use and the important is
the data processed and visualized I could get.
I gave a look at cherrypy but from a 1st sight
I couldn't see if it allows for easy graphic
charts - may be with svg ...

Thanks for any suggestions.


From bignose+hates-spam at benfinney.id.au  Tue Mar 13 18:17:40 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 Mar 2007 09:17:40 +1100
Subject: ANN: ActivePython 2.5.0.0 is now available
References: <45F701E4.4080404@activestate.com>
	<1115a2b00703131400n1c3334cbh56ce27b4009be2bd@mail.gmail.com>
Message-ID: <871wjswzy3.fsf@benfinney.id.au>

"Wensui Liu" <liuwensui at gmail.com> writes:

> Is [ActivePython] free of charge?

Yes. The only cost is to learn how to quote messages considerately.

(Please quote in sequence with what you're responding to, and trim all
the lines from the quoted message that aren't directly relevant to
your reply.)

-- 
 \            "Beware of and eschew pompous prolixity."  -- Charles A. |
  `\                                                         Beardsley |
_o__)                                                                  |
Ben Finney



From michael at jedimindworks.com  Thu Mar 22 12:21:54 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 22 Mar 2007 11:21:54 -0500
Subject: Been a while...
In-Reply-To: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
Message-ID: <06C9BEA1-B9F7-44C4-996D-71E3DFEBA716@jedimindworks.com>


On Mar 22, 2007, at 10:34 AM, John Salerno wrote:

> Hi guys. It's been a while since I've used Python, so I got a little
> rusty, but I really want to start using it again, just out of habit  
> and
> for fun. Can anyone suggest a book or a website with little projects I
> could work on to keep me busy?

http://www.pythonchallenge.com




From jgodoy at gmail.com  Tue Mar  6 07:02:26 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Tue, 06 Mar 2007 09:02:26 -0300
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
Message-ID: <87fy8i37hp.fsf@gmail.com>

"Martin Unsal" <martinunsal at gmail.com> writes:

> On Mar 5, 11:06 am, "Chris Mellon" <arka... at gmail.com> wrote:
>> I never advocated big files with many functional units - just files
>> that are "just big enough".
>
> Then we're in total agreement. I'm not sure why you thought my
> opinions were the result of baggage from other languages when you
> don't seem to actually disagree with me.

I believe the reason was that you were advocating one class per file.  "big
enough" might be more classes.  Or fewer... :-)

> I agree that there is some subtlety there, and I appreciate your
> example. However the fact that Python's module system essentially
> forces you to use "from foo import *" and that reload is almost
> entirely imcompatible with "from foo import *", I would say that
> reload is essentially useless.

The don't force you to that...  There are many modules that do, but they are
generally glueing your Python code to some other language (usually C) written
code.  This is common for GUI development, for example.

In fact, it is rare to me -- mathematics, statistics, database, web
development, testing -- to use this construction.  There are no modules that
demand that.

And you can also write:

    from foo import Bar, Baz

or even

    from foo import Bar as B1, Baz as B2  # OUCH! ;-)

> Well "from foo import Foo" is just a special case of "from foo import
> *". :) It still breaks reload. It still means you're restarting your
> interpreter even to do the most trivial development cycle.

That's what you get when you're working with instances of Foo...  I believe
that for classmethods this would work right.  So, again, it depends on your
code, how it is structured (and how it can be structured), etc. 

> Here's an analogy. In C, you can do an incremental build and run your
> modified application without having to first reboot your computer. In
> Python, where reload() is essentially the incremental build process,
> and the interpreter is essentially a virtual machine, you guys are
> saying that my best option is to just "reboot" the virtual machine to
> make sure I have a "clean slate". It may be the path of least
> resistance, but to say that it is necessary or inevitable is 1960s
> mainframe thinking.

How can you reload C code that would affect already running code --
ie. existing data, pointers, etc. -- without reloading the full program?  Even
changing and reloading a dynamic library wouldn't do that to already existing
code, so you'd have to "reboot" your application as well.



-- 
Jorge Godoy      <jgodoy at gmail.com>


From antroy at gmail.com  Thu Mar  8 16:26:46 2007
From: antroy at gmail.com (Ant)
Date: 8 Mar 2007 13:26:46 -0800
Subject: Is numeric keys of Python's dictionary automatically sorted?
In-Reply-To: <pan.2007.03.08.08.20.22.586466@REMOVEME.cybersource.com.au>
References: <esn6nu$c8nt$1@netnews.upenn.edu>
	<1173300100.810023.223130@t69g2000cwt.googlegroups.com>
	<esn8ir$c8p4$1@netnews.upenn.edu>
	<1173339260.576508.157010@c51g2000cwc.googlegroups.com>
	<pan.2007.03.08.08.20.22.586466@REMOVEME.cybersource.com.au>
Message-ID: <1173389206.238874.139510@n33g2000cwc.googlegroups.com>

On Mar 8, 8:20 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
...
> And the problem with a dictionary is that some people want to make sense
> of its order, just like in this case, and the fifty thousand previous
> times people have asked this newsgroup how they can sort a dictionary.
...
> What makes you think they won't do the same with sets?
...
> (1) Don't assume unordered data structures like sets and dicts are
> ordered, even if they look like it. They aren't.
>
> (2) If you want the keys of a dict sorted, get the keys, and sort them
> when and as you need them.

All good points. Is this misconception really as common as you suggest
(obviously there aren't really going to be 50,000 previous threads of
this nature - but you know what I mean). Because if they are, it is
perhaps a case for adding optimized sorted_dict and sorted_set to the
collections module, similar to the TreeSet and TreeMap classes in
Java.



From joshua at eeinternet.com  Thu Mar  1 15:14:12 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 01 Mar 2007 11:14:12 -0900
Subject: Python Tutorial
References: <mailman.4571.1172755996.32031.python-list@python.org>
Message-ID: <45e72789$0$16386$88260bb3@free.teranews.com>

Timm Florian Gloger wrote:

> Hi,
> 
> is Guido van Rossum's "Python Tutorial" in non-HTML formats (e.g. PDF
> or PS) avaiable for free?
> 
> Regards,
> Timm

You mean like here: http://docs.python.org/download.html

You have to download them all, but a download of the PDFs will include the
tutorial.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From alan.franzoni_invalid at geemail.invalid  Mon Mar  5 05:07:57 2007
From: alan.franzoni_invalid at geemail.invalid (Alan Franzoni)
Date: Mon, 5 Mar 2007 11:07:57 +0100
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
	<45E8FADB.7000902@cosc.canterbury.ac.nz>
Message-ID: <1rgq149m7oern$.1080aifmn5qo8$.dlg@40tude.net>

Il Sat, 03 Mar 2007 17:34:35 +1300, greg ha scritto:

> This was all discussed at *very* great length many
> years ago, and the addition of in-place operators
> to the language was held up for a long time until
> the present compromise was devised. You might not
> like it, but it's here to stay.

Sure. I'm not a great programmer and I never thought about asking for such
a removal. I'm sure that there're people smarter and more experienced than
me out there designing Python, I'm glad I got it and I won't use such
shortcuts on mutable objects in my own programs.

At least, this is I what I think today; tomorrow, when I'm more
experienced, I could think about them and say 'Hey! They're really cute,
why haven't I used them before?'

Bye!

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From dbraband at gmail.com  Fri Mar  9 03:09:51 2007
From: dbraband at gmail.com (Danilo)
Date: 9 Mar 2007 00:09:51 -0800
Subject: Configuration: Apache + mod_python
In-Reply-To: <1173389021.382297.16370@v33g2000cwv.googlegroups.com>
References: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>
	<1173352699.270216.48800@s48g2000cws.googlegroups.com>
	<1173358972.661607.38290@t69g2000cwt.googlegroups.com>
	<1173389021.382297.16370@v33g2000cwv.googlegroups.com>
Message-ID: <1173427790.920899.91380@v33g2000cwv.googlegroups.com>

On 8 Mrz., 22:23, Graham.Dumple... at gmail.com wrote:
> On Mar 9, 12:02 am, "Danilo" <dbrab... at gmail.com> wrote:
>
>
>
> > On 8 Mrz., 12:18, Graham.Dumple... at gmail.com wrote:
>
> > > On Mar 8, 9:50 pm, "Danilo" <dbrab... at gmail.com> wrote:
>
> > > > Hi there,
>
> > > > is it possible to create a rewrite rule to send every server-request
> > > > to the directory /py? But only if the file does not exists on the
> > > > server.
>
> > > > This is my mod_python section of the apache config-file.
>
> > > > <Location "/py">
> > > >         SetHandler python-program
> > > >         PythonHandler django.core.handlers.modpython
> > > >         PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
> > > >         SetEnv DJANGO_SETTINGS_MODULE myapp.settings
> > > >         PythonDebug Off
> > > > </Location>
>
> > > For the more general case of where a HTTP 404 error would otherwise be
> > > returned, indicating that a resource could not be found, as opposed to
> > > an actual physical file, you can just use:
>
> > >   ErrorDocument 404 /py
>
> > > This would be simpler than using mod_rewrite. I can't remember though
> > > whether the handler when triggered in this case can change the
> > > response status to something other than 404.
>
> > > You could use mod_rewrite if you really must, but not sure how it
> > > would interact with virtual resources managed by some handler where no
> > > actual file exists. To be practical you would probably want to
> > > restrict the scope of mod_rewrite to specific contexts.
>
> > > Quoting an example from very good book "The Definitive Guide to Apache
> > > mod_rewrite", you can do something similar to:
>
> > >   RewriteEngine On
> > >   # If its not here ...
> > >   RewriteCond %{REQUEST_FILENAME} !-f
> > >   RewriteCond %{REQUEST_FILENAME} !-d
> > >   # Look here instead ...
> > >   RewriteRule ^/images/(.*) /pics/$1 [PT]
>
> > > In this case it is causing lookups for images to be made in two
> > > places, but your case wouldn't be much different.
>
> > > Graham
>
> > The rewrite rule works, but now every request ist send to /py.
> > This is my .conf:
>
> > <VirtualHost *>
> >         DocumentRoot /var/www/mydomain.com/htdocs
> >         ServerName mydomain.com
> >         ServerAliaswww.mydomain.com
>
> >         <Location "/py">
> >                 SetHandler python-program
> >                 PythonHandler django.core.handlers.modpython
> >                 PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
> >                 SetEnv DJANGO_SETTINGS_MODULE myapp.settings
> >                 PythonDebug Off
> >         </Location>
>
> >         RewriteEngine On
> >         # If its not here...
> >         RewriteCond %{REQUEST_FILENAME} !-f
> >         RewriteCond %{REQUEST_FILENAME} !-d
> >         # Look here instead...
> >         RewriteRule (.*) /py$1 [PT]
>
> >         ErrorLog /var/www/mydomain.com/logs/error.log
> >         CustomLog /var/www/mydomain.com/logs/access.log common
> > </VirtualHost>
>
> > Any ideas what is wrong?
>
> I did say you would probably need to restrict the scope of the
> mod_rewrite rule to a specific context. In particular, put it inside
> of a Directory directive corresponding to the file system directory
> where your files live. Where you have it as the moment,
> REQUEST_FILENAME probably will not resolve to anything as Apache
> hasn't yet matched it to the filesystem. Thus:
>
>   <Directory /some/path/to/document/root>
>
>         RewriteEngine On
>         # If its not here...
>         RewriteCond %{REQUEST_FILENAME} !-f
>         RewriteCond %{REQUEST_FILENAME} !-d
>         # Look here instead...
>         RewriteRule (.*) /py$1 [PT]
>
>   </Directory>
>
> Graham

Thank you.

the RewriteCond just needs the absolute path:

	RewriteEngine On
	# If its not here...
	RewriteCond /var/www/btsgroup.de/htdocs/%{REQUEST_FILENAME} !-f
	RewriteCond /var/www/btsgroup.de/htdocs/%{REQUEST_FILENAME} !-d
	# Look here instead...
	RewriteRule (.*) /py$1 [PT]

Thanks
dan



From raacampbell at gmail.com  Sun Mar 18 16:12:20 2007
From: raacampbell at gmail.com (raacampbell at gmail.com)
Date: 18 Mar 2007 13:12:20 -0700
Subject: Stuck with pyqt: can't get/read button IDs from a qbuttongroup
In-Reply-To: <1174247928.718201.239610@n76g2000hsh.googlegroups.com>
References: <1174247928.718201.239610@n76g2000hsh.googlegroups.com>
Message-ID: <1174248740.471790.236100@l77g2000hsb.googlegroups.com>



> which translates to this in the .py:
>     def getNumber(self,a0):
>         self.listBox1.insertItem(str(id))
>

As is typically the way with these things, I've just solved it. I
changed the text in the file generated by pyui. It now reads:

   def getNumber(self,a0):
        self.listBox1.insertItem(a0)


I suppose my question now becomes whether or not editing the .py file
in this manner is good thing to be doing. What references do people
recomend I consult with regard to this sort of thing?

Thanks,
Rob



From deets at nospam.web.de  Mon Mar 12 12:25:23 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 17:25:23 +0100
Subject: programmatically manipulation environment variables of the
	calling shell
References: <mailman.4959.1173695641.32031.python-list@python.org>
	<v5fJh.11920$tD2.11496@newsread1.news.pas.earthlink.net>
Message-ID: <55ld7jF259ubbU1@mid.uni-berlin.de>

Dennis Lee Bieber wrote:

> On Mon, 12 Mar 2007 12:33:58 +0200, "Maxim Veksler" <hq4ever at gmail.com>
> declaimed the following in comp.lang.python:
> 
>> Hello list,
>> 
>> I'm trying to write a python script that would allow me to manipulate
>> shell variables of the calling shell. I'm trying to write some logic
>> that would know to add LD_LIBRARY_PATH to the users environment.
>> 
>> In bash this is done with "export", can I do this with python? (If at
>> all possible because python is actually a sub process of bash).
>>
> "calling shell"... Only OS I've encountered that allowed for a form
> of that was AmigaOS, which differentiated between "shell specific"
> (local) environment variables:
> 
> set lev "A Local Environment Variable"
> 
> and "system-wide" (global) ones:
> 
> setenv gev "Global Stuff"
> 
> The latter statement creates a file "env:gev" with "Global Stuff" as
> the contents ("env:" was a logical name for a system environment
> directory -- sys:env/ where sys: was a logical for the boot drive).
> 
> As files, system environment variables could be manipulated by
> almost anything...

Lacking memory protection, actually anything of anything could me
manipulated... and it was a _great_ OS, really loved it!

Diez


From esj at harvee.org  Sat Mar 24 11:29:34 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Sat, 24 Mar 2007 11:29:34 -0400
Subject: fine grain logging cotrol
In-Reply-To: <_P1Nh.15765$tD2.11562@newsread1.news.pas.earthlink.net>
References: <mailman.5451.1174567188.32031.python-list@python.org>	<etu19j$nqi$03$1@news.t-online.com>	<mailman.5464.1174579174.32031.python-list@python.org>	<etuvoj$pqs$03$1@news.t-online.com>	<etvvij$7h3$01$1@news.t-online.com>	<mailman.5519.1174663861.32031.python-list@python.org>	<eu12qc$1n5$00$1@news.t-online.com>	<eu1kls$og8$1@sea.gmane.org>	<op.tpny4gmex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>	<mailman.5540.1174699389.32031.python-list@python.org>
	<_P1Nh.15765$tD2.11562@newsread1.news.pas.earthlink.net>
Message-ID: <eu3g57$6p4$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Fri, 23 Mar 2007 21:15:56 -0400, "Eric S. Johansson" <esj at harvee.org>
> declaimed the following in comp.lang.python:
> 
>> Gabriel Genellina wrote:
>>
>>> I don't get all the details of what's all that stuff for, but from the  
>>> error and traceback, I think you forgot to create the filter_test  
>>> instance. That is, change lgr.addFilter(filter_test) to  
>>> lgr.addFilter(filter_test())
>>
>> do'h . for some reason, I thought addFilter took a class instead of an 
>> instance.  but on testing, I'm still missing something and getting the 
>> same error
> 
> 	Doesn't your filter_test class require a parameter itself -- the
> "name"?
yes.  here is the code that fails.  I don't understand why the unbound 
method.  what is really weird is that when I singlestep through the 
code, it never seems to call filter_test.  it is like the method never 
existed.

  File "C:\Python24\lib\logging\__init__.py", line 539, in filter
     if not f.filter(record):
TypeError: unbound method filter() must be called with filter_test 
instance as first argument (got LogRecord instance instead)

------------------
import logging
import sys

class filter_test (logging.Filter):
     test_names = { "Felis.alpha" : True,
                    "Catus.alpha" : False,
                    }

     def ___init__ (self, name):
         """simple filter test """
         logging.Filter.__init__(self, name)
         self.test_name = name

     def filter(self, record):
         """test and forget """
         return test_names.has_key( self.test_name) and test_names[ 
self.test_name ]

class LoggedType(type):
     def __new__(mcl, name, bases, classdict):
         def get_logger(self):
             tag = "%s.%s" % (name,sys._getframe(1).f_code.co_name)
             lgr = logging.getLogger(tag)
             fl = filter_test(tag)
             lgr.addFilter(fl)
             return lgr

         classdict["_%s__logger" % name] = property(get_logger)
         return type.__new__(mcl, name, bases, classdict)

class Logged:
     __metaclass__ = LoggedType

class Felis(Logged):
     def alpha(self):
         self.__logger.info("Felis.alpha")
     def gamma(self):
         self.__logger.info("Felis.gamma")

class Catus(Felis):
     def alpha(self):
         self.__logger.info("Catus.alpha")
     def beta(self):
         self.__logger.info("Catus.beta")

if __name__ == "__main__":
     logging.basicConfig(
         format="EXPECTED %(message)s GOT %(name)s", level=logging.INFO)
     f = Felis()
     f.alpha()
     f.gamma()
     c = Catus()
     c.alpha()
     c.beta()
     c.gamma()





From antroy at gmail.com  Tue Mar 27 03:41:16 2007
From: antroy at gmail.com (Ant)
Date: 27 Mar 2007 00:41:16 -0700
Subject: Nice plug for Python
Message-ID: <1174981276.244565.271580@y80g2000hsf.googlegroups.com>

Sourceforge's Project of the Month (an IT monitoring system written
using Zope and Twisted) is a good advert for Python:
http://sourceforge.net/potm/potm-2007-03.php



From donn at u.washington.edu  Fri Mar  2 12:38:59 2007
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 02 Mar 2007 09:38:59 -0800
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
	<mailman.4595.1172792873.32031.python-list@python.org>
Message-ID: <donn-B606A8.09385902032007@gnus01.u.washington.edu>

In article <mailman.4595.1172792873.32031.python-list at python.org>,
 "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> En Thu, 01 Mar 2007 14:42:00 -0300, <bayer.justin at googlemail.com> escribi?:
> 
> > BUT If I use PIPE for both (so I can .write() on the stdin and .read()
> > from the subprocess' stdout stream (better: file descriptor)) reading
> > from the subprocess stdout blocks forever. If I write something onto
> > the subprocess' stdin that causes it to somehow proceed, I can read
> > from its stdout.
> 
> On http://docs.python.org/lib/popen2-flow-control.html there are some  
> notes on possible flow control problems you may encounter.

It's a nice summary of one problem, a deadlock due to full pipe
buffer when reading from two pipes.  The proposed simple solution
depends too much on the cooperation of the child process to be
very interesting, though.  The good news is that there is a real
solution and it isn't terribly complex, you just have to use select()
and UNIX file descriptor I/O.  The bad news is that while this is
a real problem, it isn't the one commonly encountered by first
time users of popen.

The more common problem, where you're trying to have a dialogue
over pipes with a program that wasn't written specifically to
support that, is not solvable per se - I mean, you have to use
another device (pty) or redesign the application.

> If you have no control over the child process, it may be safer to use a  
> different thread for reading its output.

Right - `I used threads to solve my problem, and now I have two
problems.'  It can work for some variations on this problem, but
not the majority of them.

   Donn Cave, donn at u.washington.edu


From __peter__ at web.de  Fri Mar  9 17:27:36 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 09 Mar 2007 23:27:36 +0100
Subject: bisect on a list of lists
References: <1173471342.957772@iceman.esoterica.pt>
Message-ID: <essmtd$l63$01$1@news.t-online.com>

Paulo da Silva wrote:

> What is the best way to have something like the bisect_left
> method on a list of lists being the comparision based on an
> specified arbitrary i_th element of each list element?

A simple way that leaves the lists untouched:

>>> import bisect, random
>>> from operator import itemgetter
>>> items = [random.sample(xrange(10), 3) for _ in range(7)]
>>> items.sort(key=itemgetter(2))
>>> items
[[1, 7, 0], [9, 6, 1], [9, 8, 1], [9, 3, 2], [2, 1, 3], [9, 2, 4], [5, 2,
7]]
>>> class C(object):
...     def __init__(self, value, index):
...             self.value = value
...             self.index = index
...     def __cmp__(self, other):
...             return cmp(self.value, other[self.index])
...
>>> bisect.bisect_left(items, C(2, 2))
3

Peter


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar 23 20:36:22 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 24 Mar 2007 01:36:22 +0100
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
Message-ID: <56ja46F28lpp9U1@mid.individual.net>

Matt Garman wrote:

> Since each line corresponds to a record, what I'm trying to do is
> create an object from each record.  However, it seems that doing
> this causes the memory overhead to go up two or three times.

(Note that almost everything in Python is an object!)

> Example 1: read lines into list:
> # begin readlines.py
> import sys, time
> filedata = list()
> file = open(sys.argv[1])
> while True:
>     line = file.readline()
>     if len(line) == 0: break # EOF

"one blank line" == "EOF"? That's strange. Intended?

The most common form for this would be "if not line: (do
something)".

> Example 2: read lines into objects:
> # begin readobjects.py
> import sys, time
> class FileRecord:
>     def __init__(self, line):
>         self.line = line

What's this class intended to do?

Regards,


Bj?rn

-- 
BOFH excuse #1:

clock speed



From bearophileHUGS at lycos.com  Fri Mar 23 18:57:48 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 23 Mar 2007 15:57:48 -0700
Subject: On text processing
In-Reply-To: <mailman.5535.1174689003.32031.python-list@python.org>
References: <mailman.5535.1174689003.32031.python-list@python.org>
Message-ID: <1174690668.629592.316750@n59g2000hsh.googlegroups.com>

Daniel Nogradi:
> Any elegant solution for this?

This is my first try:

ddata = {}

inside_matrix = False
for row in file("data.txt"):
    if row.strip():
        fields = row.split()
        if len(fields) == 2:
            inside_matrix = False
            ddata[fields[0]] = [fields[1]]
            lastkey = fields[0]
        else:
            if inside_matrix:
                ddata[lastkey][1].append(fields)
            else:
                ddata[lastkey].append([fields])
            inside_matrix = True

# This gives some output for testing only:
for k in sorted(ddata):
    print k, ddata[k]


Input file data.txt:

key1    value1
key2    value2
key3    value3

key4    value4
spec11  spec12   spec13   spec14
spec21  spec22   spec23   spec24
spec31  spec32   spec33   spec34

key5    value5
key6    value6

key7    value7
more11   more12   more13
more21   more22   more23

key8    value8


The output:

key1 ['value1']
key2 ['value2']
key3 ['value3']
key4 ['value4', [['spec11', 'spec12', 'spec13', 'spec14'], ['spec21',
'spec22', 'spec23', 'spec24'], ['spec31', 'spec32', 'spec33',
'spec34']]]
key5 ['value5']
key6 ['value6']
key7 ['value7', [['more11', 'more12', 'more13'], ['more21', 'more22',
'more23']]]
key8 ['value8']


If there are many simple keys, then you can avoid creating a single
element list for them, but then you have to tell apart the two cases
on the base of the key (while now the presence of the second element
is able  to tell apart the two situations). You can also use two
different dicts to keep the two different kinds of data.

Bye,
bearophile



From soloturn at gmail.com  Fri Mar  2 14:09:01 2007
From: soloturn at gmail.com (soloturn at gmail.com)
Date: 2 Mar 2007 11:09:01 -0800
Subject: mercurial is not known from apache2
Message-ID: <1172862541.044709.129770@z35g2000cwz.googlegroups.com>

as i'm not sure if apache2 or python is responsible for this, excuse
if i try to ask here too.

our problem is that mercurial does not work from apache, but from
python command-line it does. what could be a reason for this
behaviour?

-----------------------------------------------
from the command line it works:
-----------------------------------------------
www-data at myserver ~
$ which python
/usr/local/bin/python
www-data at myserver ~
$ echo $LD_LIBRARY_PATH
/usr/local/lib:/usr/lib:/usr/local/lib:/opt/sfw/lib
www-data at myserver ~
$ python
Python 2.5 (r25:51908, Feb 22 2007, 11:38:23)
[GCC 3.4.2] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
>>> from mercurial.hgweb.hgwebdir_mod import hgwebdir
>>> ^D
www-data at myserver ~

-----------------------------------------------
from apache-2.2.4 it does not work:
-----------------------------------------------

environment, output via:
def print_env():
    print "Content-Type: text/html\n\n";
    for name, value in os.environ.items():
        print "%s\t= %s <br/>" % (name, value)
    print sys.path

SERVER_SOFTWARE = Apache/2.2.4 (Unix) DAV/2 mod_python/3.2.10 Python/
2.5 SVN/1.4.3 mod_ssl/2.2.4 OpenSSL/0.9.8d
SCRIPT_NAME = /hg
SERVER_SIGNATURE =
REQUEST_METHOD = GET
SERVER_PROTOCOL = HTTP/1.1
QUERY_STRING =
PATH = /usr/local/sbin:/usr/local/bin:/usr/local/bin:/usr/ccs/bin:/usr/
sbin:/usr/bin:/usr/dt/bin:/usr/local/bin:/cs/local/bin:/opt/sfw/bin:/
usr/ccs/bin:/opt/VRTS/bin
HTTP_USER_AGENT = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;
SV1; i-NavFourF; .NET CLR 1.1.4322; .NET CLR 2.0.50727; InfoPath.1)
TZ = MET
SERVER_NAME = myserver
REMOTE_ADDR = 169.63.210.220
SERVER_PORT = 80
SERVER_ADDR = 169.62.140.224
DOCUMENT_ROOT = /usr/local/data/htdocs
SCRIPT_FILENAME = /usr/local/data/hg09/hgwebdir.cgi
SERVER_ADMIN = admin at example.com
HTTP_HOST = myserver
HTTP_CONNECTION = Keep-Alive
REQUEST_URI = /hg
HTTP_ACCEPT = */*
GATEWAY_INTERFACE = CGI/1.1
REMOTE_PORT = 3751
HTTP_ACCEPT_LANGUAGE = en,de-ch;q=0.7,fr;q=0.3
HTTP_ACCEPT_ENCODING = gzip, deflate
UNIQUE_ID = XnNQGqk at i@EAAB9ZBgoAAAAF
['/usr/local/data/hg09', '/usr/local/lib/python2.5/site-packages/
setuptools-0.6c3-py2.5.egg', '/usr/local/lib/python2.5/site-packages/
Genshi-0.4dev_r494-py2.5.egg', '/usr/local/lib/python2.5/site-packages/
TracAccountManager-0.1.3dev_r1844-py2.5.egg', '/usr/local/lib/
python2.5/site-packages/TracCombineWiki-1.2-py2.5.egg', '/usr/local/
lib/python2.5/site-packages/TracForge-1.0-py2.5.egg', '/usr/local/lib/
python2.5/site-packages/TracWebAdmin-0.1.2dev_r4429-py2.5.egg', '/usr/
local/lib/python2.5/site-packages/TracHTTPAuth-1.1-py2.5.egg', '/usr/
local/lib/python2.5/site-packages/IniAdmin-0.1-py2.5.egg', '/usr/local/
lib/python2.5/site-packages/LdapPlugin-0.5.1dev_r1611-py2.5.egg', '/
usr/local/lib/python2.5/site-packages/tracreposearch-0.2-py2.5.egg', '/
usr/local/lib/python2.5/site-packages/TracXMLRPC-0.1-py2.5.egg', '/usr/
local/lib/python2.5/site-packages/TracTicketDelete-1.1.4-py2.5.egg', '/
usr/local/lib/python2.5/site-packages/TracNav-3.92-py2.5.egg', '/usr/
local/lib/python25.zip', '/usr/local/lib/python2.5', '/usr/local/lib/
python2.5/plat-sunos5', '/usr/local/lib/python2.5/lib-tk', '/usr/local/
lib/python2.5/lib-dynload', '/usr/local/lib/python2.5/site-packages']
exception output:
Python 2.5: /usr/local/bin/python
 /usr/local/data/hg09/hgwebdir.cgi in ()
   29 from mercurial.hgweb.hgwebdir_mod import hgwebdir
   30 from mercurial.hgweb.request import wsgiapplication
   31 import mercurial.hgweb.wsgicgi as wsgicgi

mercurial undefined, hgwebdir undefined
 /usr/local/lib/python2.5/site-packages/mercurial/hgweb/__init__.py in
()
    7 # of the GNU General Public License, incorporated herein by
reference.
    9 import hgweb_mod, hgwebdir_mod
   11 def hgweb(*args, **kwargs):

hgweb_mod undefined, hgwebdir_mod undefined
 /usr/local/lib/python2.5/site-packages/mercurial/hgweb/hgweb_mod.py
in ()
    7 # of the GNU General Public License, incorporated herein by
reference.
    9 import os, mimetypes, re, zlib, mimetools, cStringIO, sys
   10 import tempfile, urllib, bz2
   11 from mercurial.node import *
os = None, mimetypes = None, re = None, zlib undefined, mimetools
undefined, cStringIO undefined, sys undefined
<type 'exceptions.ImportError'>: ld.so.1: python: fatal: relocation
error: file /usr/local/lib/python2.5/lib-dynload/zlib.so: symbol
inflateCopy: referenced symbol not found

-----------------------------------------------
file system
-----------------------------------------------

# ls -l /usr/local/lib/python2.5/site-packages/mercurial/hgweb/
hgweb_mod.py*
-rw-r-----   1 www-data other      40810 M?r  2 14:13 /usr/local/lib/
python2.5/site-packages/mercurial/hgweb/hgweb_mod.py
-rw-r-----   1 www-data other      45015 M?r  2 14:34 /usr/local/lib/
python2.5/site-packages/mercurial/hgweb/hgweb_mod.pyc

-----------------------------------------------
try to manipulate LD_LIBRARY_PATH
-----------------------------------------------
if we try to set the ld_library_path in the hgwebdir.cgi via:
os.environ["LD_LIBRARY_PATH"] = "/usr/local/lib:/usr/local/lib:/opt/
sfw/lib"
the error mentioned above happens.
if we enter LD_LIBRARY_PATH in the apache2 envvars file, it seems not
to take it (it is not shown in the environment printet above). so
therefor the question if there is anything strange with apache-2.2.4.
just to check i entered a echo statement in apachectl to see if it
finds it and print the path
# apachectl restart
load envvars
/usr/local/lib:/usr/local/lib:/opt/sfw/lib

# nm /usr/local/lib/python2.5/lib-dynload/zlib.so | grep inflate
[209]   |         0|       0|FUNC |GLOB |0    |UNDEF  |inflate
[181]   |         0|       0|FUNC |GLOB |0    |UNDEF  |inflateCopy
[192]   |         0|       0|FUNC |GLOB |0    |UNDEF  |inflateEnd
[174]   |         0|       0|FUNC |GLOB |0    |UNDEF  |inflateInit2_

-----------------------------------------------
q&na (questions and no answers ..)
-----------------------------------------------
why it does work from the commandline, and not from apache-2.2.4 cgi?
seems to be same ld_library_path, same path, same python, same
mercurial.

--s



From nogradi at gmail.com  Sun Mar 25 12:31:07 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 25 Mar 2007 18:31:07 +0200
Subject: Other classes in a module
In-Reply-To: <46068EEF.6070000@adm.umu.se>
References: <46068EEF.6070000@adm.umu.se>
Message-ID: <5f56302b0703250931k69efb6d5h5e8ad3719541d42b@mail.gmail.com>

> Can an instance of a class in a module, in any simple way find out which
> other classes that exists in said module ?


##### module x ##########
class c1:
    pass

class c2:
    pass
#######################


Python 2.5 (r25:51908, Nov  1 2006, 11:42:37)
[GCC 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import types
>>> import x
>>> for i in dir(x):
...     if type(getattr(x,i)) is types.ClassType:
...             print "Hey, '%s' is a class!" % i
...
Hey, 'c1' is a class!
Hey, 'c2' is a class!
>>>


It might be not exactly what you want but maybe still helps.


From deets at nospam.web.de  Mon Mar 19 05:44:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 Mar 2007 10:44:13 +0100
Subject: keyword arguments for xml-rpc
References: <1174296653.983861.47630@o5g2000hsb.googlegroups.com>
Message-ID: <5674bdF27eidlU1@mid.uni-berlin.de>

proteusguy at gmail.com wrote:

>     I've just noticed that I can't seem to use keyword arguments for
> xml-rpc requests even though the protocol itself encodes parameter
> names, types, and values when it sends the xml across the network.
> This becomes a bit problematic for me because I want to store some XML-
> RPC method dispatch signatures in a database and can't easily
> guarantee parameter order when I load it so being able to pass a
> dictionary of name/value pairs greatly eases the development effort
> and helps assure correct methods get invoked. Is this a limitation of
> the SimpleXMLRPCServer, the xmlrpclib.ServerProxy, or something
> completely different?

I don't see[1] the possibility to pass keyword arguments via XMLRPC. Where
did you get that impression from? You can pass structs though, maybe that
confused you?


Diez

[1] http://www.xmlrpc.com/spec


From gdonald at gmail.com  Sat Mar 24 14:09:36 2007
From: gdonald at gmail.com (Greg Donald)
Date: Sat, 24 Mar 2007 13:09:36 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <15e66e4e0703241109q12623f0cv6473f64b35ad8cd8@mail.gmail.com>

On 24 Mar 2007 10:30:28 -0700, Robert Hicks <sigzero at gmail.com> wrote:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.


You're not required to remove the old version before installing the new version.

Just install the new version somewhere like /usr/local and put
/usr/local/bin ahead of your other paths.



-- 
Greg Donald
http://destiney.com/


From paddy3118 at googlemail.com  Fri Mar 23 20:43:57 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 23 Mar 2007 17:43:57 -0700
Subject: On text processing
In-Reply-To: <mailman.5535.1174689003.32031.python-list@python.org>
References: <mailman.5535.1174689003.32031.python-list@python.org>
Message-ID: <1174697037.391554.4690@l77g2000hsb.googlegroups.com>

On Mar 23, 10:30 pm, "Daniel Nogradi" <nogr... at gmail.com> wrote:
> Hi list,
>
> I'm in a process of rewriting a bash/awk/sed script -- that grew to
> big -- in python. I can rewrite it in a simple line-by-line way but
> that results in ugly python code and I'm sure there is a simple
> pythonic way.
>
> The bash script processed text files of the form:
>
> ###############################
> key1    value1
> key2    value2
> key3    value3
>
> key4    value4
> spec11  spec12   spec13   spec14
> spec21  spec22   spec23   spec24
> spec31  spec32   spec33   spec34
>
> key5    value5
> key6    value6
>
> key7    value7
> more11   more12   more13
> more21   more22   more23
>
> key8    value8
> ###################################
>
> I guess you get the point. If a line has two entries it is a key/value
> pair which should end up in a dictionary. If a key/value pair is
> followed by consequtive lines with more then two entries, it is a
> matrix that should end up in a list of lists (matrix) that can be
> identified by the key preceeding it. The empty line after the last
> line of a matrix signifies that the matrix is finished and we are back
> to a key/value situation. Note that a matrix is always preceeded by a
> key/value pair so that it can really be identified by the key.
>
> Any elegant solution for this?


My solution expects correctly formatted input and parses it into
separate key/value and matrix holding dicts:


from StringIO import StringIO

fileText = '''\
 key1    value1
key2    value2
key3    value3

key4    value4
spec11  spec12   spec13   spec14
spec21  spec22   spec23   spec24
spec31  spec32   spec33   spec34

key5    value5
key6    value6

key7    value7
more11   more12   more13
more21   more22   more23

key8    value8
'''
infile = StringIO(fileText)

keyvalues = {}
matrices  = {}
for line in infile:
    fields = line.strip().split()
    if len(fields) == 2:
        keyvalues[fields[0]] = fields[1]
        lastkey = fields[0]
    elif fields:
        matrices.setdefault(lastkey, []).append(fields)

==============
Here is the sample output:

>>> from pprint import pprint as pp
>>> pp(keyvalues)
{'key1': 'value1',
 'key2': 'value2',
 'key3': 'value3',
 'key4': 'value4',
 'key5': 'value5',
 'key6': 'value6',
 'key7': 'value7',
 'key8': 'value8'}
>>> pp(matrices)
{'key4': [['spec11', 'spec12', 'spec13', 'spec14'],
          ['spec21', 'spec22', 'spec23', 'spec24'],
          ['spec31', 'spec32', 'spec33', 'spec34']],
 'key7': [['more11', 'more12', 'more13'], ['more21', 'more22',
'more23']]}
>>>

- Paddy.



From jjl at pobox.com  Sat Mar 10 18:10:05 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 10 Mar 2007 23:10:05 GMT
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
Message-ID: <87zm6kzodq.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:
[...]
>     Python, on the other hand, is uphill all the way.  Constant trouble
> with version issues, especially with C components called from Python.
> MySQLdb, M2Crypto, SSL - they all have platform/version
> incompatibility problems.  I just spent three days making M2Crypto
> work on a new Linux server with a different Red Hat version.
> Neither Python's packaging tools nor the platform's packaging
> tools deal adequately with these issues.
[...]

You haven't been using mod_python, by any chance?


John


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 05:57:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 07:57:06 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<1173426599.403173.49240@v33g2000cwv.googlegroups.com>
	<mailman.4845.1173430612.32031.python-list@python.org>
	<1173436219.937145.12550@64g2000cwx.googlegroups.com>
Message-ID: <op.tow4pgdnx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 07:30:20 -0300, Gerard Flanagan  
<grflanagan at yahoo.co.uk> escribi?:

>> There is a serious flaw on this approach, the function can't return any
>> false value (it would be treated as a failure).
>
> I was teaching myself decorators more than anything, so it's not
> thought out to any extent, but even so I don't think it's a "serious
> flaw", rather it would be programmer error to use @onfailFalse on a
> function that may return False. Don't you think?

I thought this was on response to the original problem, not for your own  
problem.

-- 
Gabriel Genellina



From MonkeeSage at gmail.com  Tue Mar  6 19:58:09 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Mar 2007 16:58:09 -0800
Subject: Interface Implementation in Python
In-Reply-To: <1173227039.060361.134060@8g2000cwh.googlegroups.com>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
	<mailman.4718.1173194071.32031.python-list@python.org>
	<1173210940.884656.158180@t69g2000cwt.googlegroups.com>
	<1173227039.060361.134060@8g2000cwh.googlegroups.com>
Message-ID: <1173229089.188072.293270@q40g2000cwq.googlegroups.com>

On Mar 6, 6:23 pm, p_sha... at yahoo.com wrote:
> I dont want to expose the above Point3D implementation to the user /
> client side.To achieve that we can use interface concept.In Python to
> use interface concept.

In python you would use name mangling to hide parts of the interface
from the public.

class Point3D:
    def __init__(self):
        self.__x = 0.0
        self.__y = 0.0
        self.__z = 0.0

    def __setPoint(x,y,z):
        self.__x = x
        self.__y = y
        self.__z = z

    def __getPoint(x,y,z):
        x = self.__x
        y = self.__y
        z = self.__z

p = Point3D()
p.__setPoint(1,2,3)

# ...
# AttributeError: Point3D instance has no attribute '__setPoint'

Regards,
Jordan



From zefirek at Speacock.Pau.Apoznan.Mpl  Fri Mar  2 09:29:41 2007
From: zefirek at Speacock.Pau.Apoznan.Mpl (zefciu)
Date: Fri, 02 Mar 2007 15:29:41 +0100
Subject: Converting a c array to python list
In-Reply-To: <es66m4$cnr$1@inews.gazeta.pl>
References: <es66m4$cnr$1@inews.gazeta.pl>
Message-ID: <es9cab$mu6$1@inews.gazeta.pl>

I have just read about buffer and array objects and I think one of them
could be fit for my need.  However there are two questions.

If i make a buffer from a part of dynamically allocated memory, what
would free it?  Should it be allocated with malloc or some
python-specific function?

How on earth can I create array object in C?

zefciu


From miamijug at gmail.com  Thu Mar 15 21:32:00 2007
From: miamijug at gmail.com (miamijug)
Date: 15 Mar 2007 18:32:00 -0700
Subject: Registration Open for South Florida Software Symposium 2007
Message-ID: <1174008720.914436.100180@y66g2000hsf.googlegroups.com>

We are happy to announce the South Florida Software Symposium 2007.

South Florida Software Symposium
May 18 - 20, 2007

Hotel Intercontinental Miami West
2505 Northwest 87th Avenue
Miami, Florida 33172

http://www.nofluffjuststuff.com/sh/2007-05-Miami

The NFJS Symposium Tour is coming to South Florida on May 18 - 20,
2007. Get ready to have three intensive days of learning and
networking.

The No Fluff Just Stuff Software Symposium Series is designed to cover
the latest in  trends, best practices, and newest developments in
Enterprise Java, Java/Groovy, ESB/SOA, Ajax, Web Services, Agility,
and Architecture.

SFSS 2007 will offer four concurrent sessions for you to choose from.
The hot topics covered at SFSS 2007 include:

* Groovy/Grails
* OSGI
* Spring 2.0
* Domain Driven Design
* Annotations
* Java 6.0
* REST
* Google Web Toolkit
* JRuby
* Seam
* Enterprise Ajax
* JPA and many more!

We have another great set of speakers lined up for you to enjoy
featuring:

* Venkat Subramaniam, co-author "Practices of an Agile Developer"
* Neal Ford, author "Art of Java Web Development"
* Ted Neward, author of "Effective Enterprise Java"
* David Hussman, Agility Expert
* Ben Hale, Sr. Consultant with Interface 21
* Greg Murray, Ajax Architect w/Sun.

Great Swag in 2007 - all attendees receive a new 2007 NFJS laptop bag
& custom binder.

Excellent Giveaways - Sony E-reader, Sony Playstation 3 and Apple
iPods.


Best Regards,

Maudrit Martinez
Miami Java Users Group Leader
mmartinez [at] miamijug [dot] org
http://www.miamijug.org

"A designer knows he has achieved perfection not when there is nothing
left to add, but when there is nothing left to take away" ~Antoine de
Saint-Exupery



From bert.heymans at gmail.com  Thu Mar 15 17:56:13 2007
From: bert.heymans at gmail.com (Bert Heymans)
Date: 15 Mar 2007 14:56:13 -0700
Subject: Python shell on mac os x
Message-ID: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>

Hi!

I'm using iTerm on the mac the keymapping isn't right. On Linux and
Windows it's really nice to be able to hit up to get the previous
command. Does anyone know a way to get the Pyhton shell to work like
on other systems, I always get this when I hit the direction keys:

>>> ^[OA^[OC^[OD

I've been looking for the correct mappings but can't find a proper
reference online nor what the Python shell expects. Any help would be
greatly appreciated! Hints/suggestions on keywords to use in a search
on Google are always welcome :) I don't know where to begin looking
for this kind of information.

kind regards,

- Bert Heymans



From jacob at cd.chalmers.se  Fri Mar 30 17:08:59 2007
From: jacob at cd.chalmers.se (Jacob Hallen)
Date: Fri, 30 Mar 2007 21:08:59 +0000 (UTC)
Subject: PyPy 1.0: JIT compilers for free and more
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<euenc1$fks$1@nemesis.news.tpi.pl>
Message-ID: <euju9b$f47$1@gide.ita.chalmers.se>

In article <euenc1$fks$1 at nemesis.news.tpi.pl>,
Jarek Zgoda  <jzgoda at o2.usun.pl> wrote:
>Carl Friedrich Bolz napisa?(a):
>
>> Welcome to the PyPy 1.0 release - a milestone integrating the results
>> of four years of research, engineering, management and sprinting
>> efforts, concluding the 28 months phase of EU co-funding!
>
>So it took 4 yars of work and over 2 yaers of consumption of EU funds,
>yeah, great.
>
>Could anybody explain, what this gives to Python and its users? Would
>we, eventually, get GIL-free VM, that is capable to consume all
>available power of multicore processors? Or, maybe, we'll get something
>special, I am unable to dream of? Or is it purely academic project to
>create Python VM in Python?

No, PyPy is not a purely academic project. It has been a practically oriented
project from the very start.

For the regular user of Python, the main benefit of PyPy is execution speed.
With the Just-in-time optimizer, we have examples of functions doing
integer math that are 63 times faster than CPython. Further work will
broaden the scope of the optimizations to other language constructs.
Bulding the framework for the JIT took a long time. Now that it is in
place, extending the range of optimizations is a much smaller task.

For the Python language developers, PyPy offers an easy environment for
testing new ideas. Changes and alternative solutions can more quickly
be implemented in Python than in C.

For people who want to broaden the scope of Python, there is the option
of using some of the models that the PyPy project has implemented,
or roll their own. Constraints satisfaction, lazy evaluation, cooperative
massive multitasking, security oriented environments, transparent
distributed computing and persistence are examples of things the project
have implemented. There are some very neat APIs so that you can easily
add your own behaviour to the Python interpreter.

For those who want to do Computer Science, PyPy offers a wonderful
research platform. For instance, you can experiment with alternate
or even multiple implementations of builtin types. You can build frontends
for your favourite programming language and backends for your favourite
platform. Since Javascript is a backend that we already handle fairly
well, you can write your FORTRAN parser and have a FORTRAN to JS compiler.
The neat thing is that once you build the parser, you should automatically
have your code working on all the different backends. (This is a goal and
not quite reality at this point in time. Bugs and shortcomings will still
be in the way.)

There is a tradeoff in computer language design between execution speed
flexibility and ease of use. I personally think that PyPy is about to
break out of the tradeoff and bring it to another level. I know that I am
biased, having been involved with the project from the start, but I
think that it is the most interesting work in CS in many years.

Jacob Hall??n


-- 


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From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 30 09:23:40 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 30 Mar 2007 23:23:40 +1000
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.30.13.23.40.465374@REMOVE.THIS.cybersource.com.au>

On Fri, 30 Mar 2007 02:04:45 -0700, DE wrote:

> Hello,
> 
> Here is what I do in C++ and can not right now in python :
> 
> pushMatrix()
> {
>      drawStuff();
> 
>      pushMatrix();
>      {
>             drawSomeOtherStuff()
>      }
>      popMatrix();
> }
> popMatrix();
> 
> The curly brackets have no functional meaning 
> but increase the readability significantly. 

I don't understand why you are indenting 
the function calls. What does the
indentation and spacing signify?

Or, to put it another way:


    I don't understand why you 
    {
        are indenting 
        {
            the function calls. 
        }
    What does the
    }
    indentation signify?



> I want to be able to do the same thing in
> python. Since curly brackets are not available and indenting without
> an if or while conditional doesn't work, I have started to question if
> this is possible in python at all.

Thank goodness it isn't, in general.

But if you want people to point at you and laugh in the street, you can do
this:

pushMatrix()
if True:
    drawStuff();

    pushMatrix();
    if True:
        drawSomeOtherStuff()

    popMatrix();

popMatrix();



> Any ideas ?

Some people 
    have a strange 
        idea of 
    "increase 
readability".


-- 
Steven.



From rbutler at mtsu.edu  Sun Mar 25 00:46:36 2007
From: rbutler at mtsu.edu (Ralph Butler)
Date: Sat, 24 Mar 2007 23:46:36 -0500
Subject: question about C extensions
In-Reply-To: <B4WdnWF575o3JJjbnZ2dnUVZ_vOlnZ2d@comcast.com>
References: <B4WdnWF575o3JJjbnZ2dnUVZ_vOlnZ2d@comcast.com>
Message-ID: <PoGdnZJHY_QyY5jbnZ2dnUVZ_v3inZ2d@comcast.com>

I think I may have figured all this out by looking at examples in the 
python source, e.g. xxsubtype.c etc.  Nonetheless, I would appreciate 
any extra info others might provide.
Thanks again.
--ralph

Ralph Butler wrote:
> Hi:
> I have a question about extending python with C.  I have read the docs 
> and done some googling, but come up short on this particular (small) 
> problem.  I want to write a c extension to int.  In particular, I want 
> to grab the memory for the int from an alternative heap.  I am confused 
> about 2 things:  (1) Do I need to call the __init__ function for int 
> itself, and if so, how do I do that?  (2)  Do I supply my own tp_alloc 
> function to retrieve the memory for my new elements, and if so, what 
> should it look like?  (Assume for the moment that I simply plan to do a 
> malloc.)
> 
> I have attached code that does most of the work and has my initials 
> (RMB) at a couple of the pieces of code I think I may need.
> 
> Any pointers to fairly specific examples would be appreciated.  I have 
> found non-specific examples a bit confusing.
> 
> Thanks.
> --ralph
> 
> 
> ------------------------------------------------------------------------
> 
> from distutils.core import setup, Extension
> 
> setup (name = "intext",
>        version = "1.0",
>        maintainer = "rbutler",
>        maintainer_email = "rbutler at mtsu.edu",
>        description = "shared memory objects",
>        ext_modules = [Extension('intext',sources=['intext.c'])]
> )
> 
> 
> ------------------------------------------------------------------------
> 
> #!/usr/bin/env python
> 
> # inherit from int
> 
> import intext
> 
> x = intext.INTEXT(44)
> print type(x)
> print x
> print int(x) + 33
> 
> 
> ------------------------------------------------------------------------
> 
> #include <Python.h>
> 
> static PyTypeObject *INTEXT_type_p;
> 
> #define PyINTEXT_Check(obj) ((obj)->ob_type == INTEXT_type_p)
> 
> typedef struct newtypeobjectstruct
> {
>     PyObject_HEAD 
>     int *intextp;
> } pyintext;
> 
> static PyObject *pyintext_tp_alloc(PyTypeObject *type, int nitems)
> {
>     printf("tpalloc: nitems=%d\n",nitems);
>     // RMB: grab memory for the object
>     return (PyObject *) NULL;
> }
> 
> static int pyintext_init(pyintext *self, PyObject *args)
> {
>     int iv;
> 
>     if ( ! PyArg_ParseTuple(args,"i",&iv))
> 	return -1;
>     printf("init iv=%d\n",iv);
>     // RMB: invoke the super class __init__ ??
>     return 0;
> }
> 
> static char INTEXT_type_doc[] = "intext type doc";
> PyTypeObject INTEXTType = {
>     PyObject_HEAD_INIT(&PyType_Type) 0,  /* ob_size */
>     "intext.INTEXT",                     /* tp_name */
>     sizeof(pyintext),                    /* tp_basicsize */
>     0,                                   /* tp_itemsize */
>     0,                                   /* tp_dealloc */
>     (printfunc) NULL,                    /* tp_print */
>     0,                                   /* tp_getattr*/
>     0,                                   /* tp_setattr */
>     0,                                   /* tp_compare */
>     0,                                   /* tp_repr */
>     0,                                   /* tp_as_number */
>     0,                                   /* tp_as_sequence */
>     0,                                   /* tp_as_mapping */
>     0,                                   /* tp_hash */
>     0,                          /* tp_call */
>     0,                          /* tp_str */
>     0,                          /* tp_getattro */
>     0,                          /* tp_setattro */
>     0,                          /* tp_as_buffer */
>     Py_TPFLAGS_HAVE_CLASS,      /* tp_flags */
>     INTEXT_type_doc,            /* tp_doc */
>     0,                          /* tp_traverse */
>     0,                          /* tp_clear */
>     0,                          /* tp_richcompare */
>     0,                          /* tp_weaklistoffset */
>     0,                          /* tp_iter */
>     0,                          /* tp_iternext */
>     0,                          /* tp_methods */
>     0,                          /* tp_members */
>     0,                          /* tp_getset */
>     &PyInt_Type,                /* tp_base */
>     0,                          /* tp_dict */
>     0,                          /* tp_descr_get */
>     0,                          /* tp_descr_set */
>     0,                          /* tp_dictoffset */
>     (initproc) pyintext_init,   /* tp_init */
>     pyintext_tp_alloc,                          /* tp_alloc */
>     PyType_GenericNew,          /* tp_new */
>     0,                          /* tp_free */
>     0,                          /* tp_is_gc */
> };
> 
> static char intext_module_doc[] = "intext module doc";
> static struct PyMethodDef intext_module_methods[] = {
>     {NULL, NULL, 0, NULL}
> };
> 
> void initintext(void)
> {
>     PyObject *m;
>     /* Create the module and add the functions */
>     INTEXT_type_p = &INTEXTType;
>     INTEXTType.ob_type = &PyType_Type;
>   
>     if (PyType_Ready(INTEXT_type_p) < 0)
>       return;
>   
>     m = Py_InitModule3("intext",intext_module_methods,intext_module_doc);
>     if (!m)
>     {
>         printf("Py_InitModule3 failed\n");
>         return;
>     }
>   
>     Py_INCREF(INTEXT_type_p);
>     PyModule_AddObject(m, "INTEXT", (PyObject *) & INTEXTType);
> }


From steve at holdenweb.com  Sun Mar 25 18:18:03 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 25 Mar 2007 18:18:03 -0400
Subject: problem at installing phyton on windows
In-Reply-To: <1174857800.421722.218190@e65g2000hsc.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>	<eu6k3n$uk6$03$1@news.t-online.com>
	<1174857800.421722.218190@e65g2000hsc.googlegroups.com>
Message-ID: <eu6shc$o94$1@sea.gmane.org>

gslm wrote:
> Please, can you read again?
> Yes, I understand that in phyton interpreter, i can't call phyton
> command.Thanks...
> 
> But how can i run '.py' files from this command line?I wanted to use
> the phyton command for this.
> 
> When i click a py extended file, for example calendar.py in lib
> directory, file opens, then suddenly close,except graphical ones.Why?
> How can i see the results?
> 
> And where can i learn which library must i import for whic class?
> 
> Sorry, i ask much:(But after learning these starting knowledeges, i
> read tutorials, manuals etc.
> But now i haven't found my answers yet.
> Regards...
> 

http://www.python.org/doc/faq/windows.html#how-do-i-run-a-python-program-under-windows

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From nagle at animats.com  Wed Mar  7 23:45:00 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 04:45:00 GMT
Subject: Debugging segmentation faults
In-Reply-To: <1173327134.755144.175540@n33g2000cwc.googlegroups.com>
References: <1173294934.182507.116790@h3g2000cwc.googlegroups.com>
	<1173300944.602217.194030@j27g2000cwj.googlegroups.com>
	<7YFHh.5597$M65.1613@newssvr21.news.prodigy.net>
	<1173327134.755144.175540@n33g2000cwc.googlegroups.com>
Message-ID: <gxMHh.1205$FG1.948@newssvr27.news.prodigy.net>

George Sakkis wrote:
> On Mar 7, 4:15 pm, John Nagle <n... at animats.com> wrote:
> 
> 
>>    You're using Python on a web server to do something
>>complicated.  You must suffer.
>>
>>    Are you trying to fork off a subprocess in a multithreaded
>>program?  That's unlikely to work.  The sematics differ
>>from OS to OS (Solaris forks all the threads, most other
>>operating systems don't; most UNIX-based OSs copy all the
>>open file descriptors, but some give you control of which
>>open files are passed), and Python may not be thread-safe
>>in that area.
> 
> 
> I see the potential problem in general, but in my case every thread is
> exclusively responsible for the subprocesses it forks; no subprocess
> is inherited from the main thread or is shared in among the worker
> threads.

    Forking itself may not be thread safe.  Forking is a process-level
operation, for historical reasons.

					John Nagle


From Blh  Sat Mar 31 10:49:59 2007
From: Blh (BlhBlh@Blh)
Date: Sat, 31 Mar 2007 09:49:59 -0500
Subject: wxPython help
Message-ID: <OPSdnSqrHZOK6JPbnZ2dnUVZ_vGinZ2d@giganews.com>

i have installed wxpython v2.6 for python 2.4 
my python installation is at d:\python24

the statement "import wx" works perfectly
but when i use "import images", it says that there is no module, but 
i know for a fact that there is.

can anyone help?


--
--------------------------------- --- -- -
Posted with NewsLeecher v3.8 Beta 8
Web @ http://www.newsleecher.com/?usenet
------------------- ----- ---- -- -



From aahz at pythoncraft.com  Sun Mar  4 14:00:33 2007
From: aahz at pythoncraft.com (Aahz)
Date: 4 Mar 2007 11:00:33 -0800
Subject: thread safe SMTP module
References: <mailman.4616.1172878783.32031.python-list@python.org>
	<esd374$927$1@panix3.panix.com>
	<mailman.4644.1172997256.32031.python-list@python.org>
Message-ID: <esf50h$9n6$1@panix3.panix.com>

In article <mailman.4644.1172997256.32031.python-list at python.org>,
Gordon Messmer  <yinyang at eburg.com> wrote:
>Aahz wrote:
>> 
>> That doesn't make any sense.  Blocking I/O generally releases the GIL,
>> which is the whole reason Python doesn't totally suck for threading.
>
>Nevertheless, among the caveats listed at 
>http://docs.python.org/lib/module-thread.html is:
>
>"Not all built-in functions that may block waiting for I/O allow other 
>threads to run. (The most popular ones (time.sleep(), file.read(), 
>select.select()) work as expected.)"

That's why I said "generally".

>> There may be other thread problems, but I doubt that you have correctly
>> analyzed their source.
>
>I subclassed smtplib.SMTP and replaced only the lines of code that had 
>to do with blocking IO (connect, send and receive operations). 
>Beforehand, python would occasionally lock up. Having made those 
>changes, python stopped locking up.  I think the problem was pretty well 
>apparent.  I can't pin it down to which one of those three operations 
>was at fault, and it may be that only one was.  However, when I use 
>non-blocking IO, the application works.  When I used smtplib.SMTP, it 
>didn't.
>
>I'm open to other explanations.

Assuming you have correctly tracked down the problem area, I would call
that a thread bug in Python.  But my experience is that you simply have
run into a problem with the socket.  I would suggest that using
socket.setdefaulttimeout() would work just as well.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From aleax at mac.com  Sun Mar 25 01:46:12 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 24 Mar 2007 22:46:12 -0700
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<pan.2007.03.24.03.22.09.963233@REMOVE.THIS.cybersource.com.au>
	<mailman.5576.1174800630.32031.python-list@python.org>
Message-ID: <1hvi4j4.1gp5jd311x2xlpN%aleax@mac.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:

>  "Steven D'Aprano" <steve at REMOVE.THIS.cyb...urce.com.au> wrote:
> 
> 
> > On Fri, 23 Mar 2007 13:15:29 -0700, John Machin wrote:
> > 
> > > OK, I'll bite: This was "new" in late 2000 when Python 2.0 was
> > > released. Where have you been in the last ~6.5 years?
> > 
> > Western civilization is 6,000 years old. Anything after 1850 is "new".
> > 
> > *wink*
> 
> another nibble:
> 
> What happened in 1850 to make it the demarcation line?

California became a US State.  A pretty good demarcation point, I'd say!


Alex


From hg at nospam.org  Fri Mar  9 07:45:19 2007
From: hg at nospam.org (hg)
Date: Fri, 09 Mar 2007 13:45:19 +0100
Subject: floating point rounding
Message-ID: <DOiIh.135$TK5.124@newsfe13.lga>

Hi,

Here is my issue:

f = 1.5 * 0.01
f
>> 0.014999999999999999
'%f' % f
>>'0.015000'


But I really want to get 0.02 as a result ... is there a way out ?

Thanks,

hg



From suyuancn at gmail.com  Thu Mar 29 07:55:06 2007
From: suyuancn at gmail.com (Su Y)
Date: 29 Mar 2007 04:55:06 -0700
Subject: Weird behavior in search in a list
In-Reply-To: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
Message-ID: <1175169306.021284.46270@e65g2000hsc.googlegroups.com>

On 3?29?, ??7?51?, "Su Y" <suyua... at gmail.com> wrote:
> hi all,
> I can't understand how this code work, its behavior is really weird
> for me...
>
> I want find the first number in extend[] which is larger than num, soI wrote:
>
> def find(num):
>     count=0
>     for elem in extend:
>         if elem<num:
>             count+=1
>     return count
>
> I found that if extend[] is monotonous, like [1.1, 2.3, 3.2, 4.5,
> 5.6],
> it works fine: find(4) returns 3, extend[3] is 4.5.
> But, if extend[] is not monotonous, like [1.1, 2.3, 3.2, 4.5, 5.6,
> 4.6, 3.4, 2.1, 0.3],
> find(4) returns 6, extend[6] is 3.4!
>
> what's going on here? I really can't understand....

and I am using Python 2.5 on WinXP.



From paul at boddie.org.uk  Mon Mar 12 16:26:44 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 12 Mar 2007 13:26:44 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173728423.775330.164470@t69g2000cwt.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
	<1173728423.775330.164470@t69g2000cwt.googlegroups.com>
Message-ID: <1173731204.621260.192000@30g2000cwc.googlegroups.com>

Goldfish wrote:
> You can definitely create a web bot with python. It doesn't require
> that you "drive" A real web browser.

That's true, but if you want to print the page to a file, you need
something that can reproduce the intended layout. The Pyglet library
developers mention "XML/HTML+CSS" as something the layout engine can
deal with, which sounds quite impressive if its support of CSS is
comprehensive:

http://pyglet.org/

Paul



From http  Fri Mar 23 21:35:34 2007
From: http (Paul Rubin)
Date: 23 Mar 2007 17:35:34 -0800
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
Message-ID: <7xaby3qv89.fsf@ruckus.brouhaha.com>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
> >     if len(line) == 0: break # EOF
> "one blank line" == "EOF"? That's strange. Intended?

A blank line would have length 1 (a newline character).  


From skip at pobox.com  Sat Mar 10 19:15:36 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 10 Mar 2007 18:15:36 -0600
Subject: distributed queue?
In-Reply-To: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
Message-ID: <17907.18984.830600.624175@montanaro.dyndns.org>


    Paul> Does anyone have an implementation of a distributed queue?  I.e. I
    Paul> have a long running computation f(x) and I'd like to be able to
    Paul> evaluate it (for different values of x) on a bunch of different
    Paul> computers simultaneously, the usual "worker thread" pattern except
    Paul> distributed across a network.

PyBrenda maybe?  (Dunno if it's even still around.)

Skip


From richardjones at optushome.com.au  Sun Mar 18 17:01:25 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Mon, 19 Mar 2007 08:01:25 +1100
Subject: cheese shop: tagging and dating
References: <1174222345.818697.128020@e65g2000hsc.googlegroups.com>
	<877ite1zb8.fsf@gmail.com>
Message-ID: <45fda8a4$0$22844$afc38c87@news.optusnet.com.au>

Jorge Godoy wrote:
> "metaperl.etc at gmail.com" <metaperl.etc at gmail.com> writes:
>> The first thing I look at when examining a module is how often it is
>> updated. Unfortunately, the entries there dont show this. Eg:
>>
>>   http://www.python.org/pypi/PySimpleXML/1.0
>>
>> Second, it seems that tagging is more popular than the hierarchical
>> browsing method currently offered by Cheese Shop. Are there efforts
>> underway to support a tagging interface for the cheeseshop?
> 
> I believe hierarchies are easier when there's a lot of information.  You
> go browsing by topic.
> 
> If there are only tags available, you'd have to look for hundreds of tags
> to see if none of the possible names for the "thing" has been used
> ("database", "db", "relational", "orm", "mapper", etc.).

Jorge presents a perfect example of why I've always resisted adding
arbitrary keywords as meta-data to the Cheese Shop set.

If you want arbitrary searches like this (say you think that the database
module you want to find has "tagged" itself with "db"), use the search box.
It'll search names and descriptions. And then when you don't find a match,
you can try "database" and then "relational" and then ... or you could use
the browse interface to search using the one valid term, "Topic ::
Database"

This meta-data isn't about enabling package maintainer artistic creativity
in describing packages, it's about making packages discoverable for end
users.


    Richard



From robert.kern at gmail.com  Tue Mar 13 23:09:08 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 13 Mar 2007 22:09:08 -0500
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <1173841066.530575.73050@n59g2000hsh.googlegroups.com>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>	<mailman.5051.1173838059.32031.python-list@python.org>
	<1173841066.530575.73050@n59g2000hsh.googlegroups.com>
Message-ID: <et7p0o$arv$1@sea.gmane.org>

vj wrote:
>> It is just a redirection to the numpy-discuss... at scipy.org list. If you just
>> tried in the past hour or so, I've discovered that our DNS appears to be down
>> right now.
> 
> I tried registering the twice the last couple of days and never got an
> email back.

Hmm. Odd. I just tried to register and haven't gotten a confirmation email, yet,
either. I'll get our sysadmin on it.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From dcramer at gmail.com  Mon Mar 12 21:03:40 2007
From: dcramer at gmail.com (David Cramer)
Date: 12 Mar 2007 18:03:40 -0700
Subject: Python in a desktop environment
In-Reply-To: <45f58642$0$1408$426a74cc@news.free.fr>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<55lbl1F25geaaU1@mid.uni-berlin.de>
	<45f58642$0$1408$426a74cc@news.free.fr>
Message-ID: <1173747820.728559.102360@q40g2000cwq.googlegroups.com>

On Mar 12, 9:56 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Diez B. Roggisch a ?crit :
>
> > Bruno Desthuilliers wrote:
>
> >> Grant Edwards a ?crit :
> >> (snip)
>
> >>> Python is _far_ more robust than C++.
>
> >> I wouldn't say so - robustness is a quality of a program, not of a
> >> language !-)
>
> > Nope. Dealing with dangling references and double frees, complex
> > copy-semantics that change only by a feeble character or via overloaded and
> > thus hard to comprehend assignment operators are all properties of C++,
>
> Indeed
>
> > and
> > tremendously afflict robustness IMHO.
>
> robustness of programs written with this language, yes.
>
> NB : I'm afraid the smiley got lost somewhere between screen and
> readers, so here comes another one !-)

Everyone seems to have misunderstood what I want. I'm a Python
developer, I don't give a rats ass about what people say about C#,
Python, or c++, they all have their uses. My main reasoning for
considering C++ as the backend is some things (reading memory for
example) are much easier to do in C++ than in Python, and we already
have a lot written in C++.

The argument about robustness, has nothing to do with how nicely
formatted the language is, or how great the tracebacks are, it's
strictly about how high the memory cost is and how much CPU it's going
to take. Python is well known for being high on memory and C++ being
compiled can be a lot faster for things.

Anyways, thanks for everyones feedback, we will most likely go with a
combination of Python and C++.



From gagsl-py2 at yahoo.com.ar  Thu Mar  1 06:41:48 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Mar 2007 08:41:48 -0300
Subject: How to check for remaining hard drive space in Windows?
References: <1172694391.256770.234450@j27g2000cwj.googlegroups.com>
	<2adc542f0702281259q3ab2ac1dr8e76e6157f96537b@mail.gmail.com>
	<mailman.4531.1172697404.32031.python-list@python.org>
	<1172697850.946627.196420@a75g2000cwd.googlegroups.com>
	<1172699693.411268.153760@j27g2000cwj.googlegroups.com>
Message-ID: <op.toidfyqix6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 28 Feb 2007 18:54:53 -0300, kevinliu23 <kevinliu23 at gmail.com>  
escribi?:

> It's great because I don't even have to worry about the computer name.
> A question regarding the rootPath parameter...how would I be passing
> it? Would I be passing it as...
>
>    tuple = win32api.GetDiskFreeSpace(r'C:')
> or just leave it blank and the function will automatically use the
> rootPath of where the .py file resides?

For GetDiskFreeSpace, the argument *must* end in \, so you should use  
GetDiskFreeSpace('C:\\')
Using GetDiskFreeSpaceEx, it can be any directory. If you leave it, the  
current directory (or current disk) is used - this may or may not be the  
directory where the .py resides.
About the 2GB limit, it only applies to Win98 and earlier. Since the ...Ex  
function works on 98 too, unless you need to support Win95, it's easier to  
use that function.
And you can use UNC paths too, so it may even be used for querying  
available space on remote machines, but I've never tried it that way.

-- 
Gabriel Genellina



From michael at jedimindworks.com  Thu Mar 22 13:27:49 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 22 Mar 2007 12:27:49 -0500
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <etui34$24l$1@news4.zwoll1.ov.home.nl>
References: <mailman.5428.1174517933.32031.python-list@python.org>	<ettgei$rki$1@news2.zwoll1.ov.home.nl>	<mailman.5446.1174557039.32031.python-list@python.org>	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
Message-ID: <90D6E2A9-D818-4520-9EFA-7E9563A8555A@jedimindworks.com>


On Mar 22, 2007, at 12:07 PM, Anton Vredegoor wrote:

> Agreed. There's now probably even room on the job market for those who
> don't belong to the select elite of early adopters. We might even root
> out the professionalist attitude and address the problem of tying  
> people
> to their resumes.

Perhaps it is different where you live, but here you can put on your  
resume relevant things that aren't paying jobs.  Otherwise nobody  
would ever get their first job, right?



From gagsl-py2 at yahoo.com.ar  Thu Mar 15 22:29:44 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 23:29:44 -0300
Subject: Python COM called from VB/Delphi
References: <3KidnaXVSJHiDWXYnZ2dnUVZ_vGinZ2d@comcast.com>
Message-ID: <op.to9fvuacx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 21:17:12 -0300, Larry Bates <lbates at websafe.com>  
escribi?:

> I have a rather large Python class that I've converted to
> a COM object.  I can dispatch (using either Python or VB)
> and call the methods perfectly.  Now a new client wants
> to call it from Delphi.  Can anyone out there give me
> any pointers on how that would be done.  Are there any
> "gotchas" about the way arguments or return values
> would need to be different for Delphi.  I have NO Delphi
> experience so I'm completely lost.

The same as he would do for any other COM object. There are tools in  
Delphi for building automatically the needed Delphi declarations  
(interfases, classes, methods, constants... similar to what makepy does  
for Python).
All OLE types work fine. (Variants are a bit hard to process, yes, but it  
can be done)

> Secondly, I need a callback function in VB (progress
> meter) that I can pass to Python COM object to show

Sorry, I try to stay away of VB as far as possible :)

-- 
Gabriel Genellina



From greg at cosc.canterbury.ac.nz  Fri Mar 16 20:43:13 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 17 Mar 2007 13:43:13 +1300
Subject: Circular Class Logic
In-Reply-To: <1174027211.183271.258410@b75g2000hsg.googlegroups.com>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
	<1173962904.306751.86160@n76g2000hsh.googlegroups.com>
	<1173984908.706651.50260@y80g2000hsf.googlegroups.com>
	<1173986733.127500.250250@b75g2000hsg.googlegroups.com>
	<1174010549.473733.270810@l77g2000hsb.googlegroups.com>
	<1174027211.183271.258410@b75g2000hsg.googlegroups.com>
Message-ID: <560s1jF275570U1@mid.individual.net>

Paul McGuire wrote:
> I always assumed that super, being added to
> the language later, represented some form of improvement, but this may
> not be 100% correct.

It's not -- super is not a replacement for explicit
inherited method calls. It does something different,
and has different use cases.

It's usually not appropriate for __init__ calls,
because an __init__ method generally doesn't have
the same signature as that of its base class(es).
You're better off calling the base __init__
directly, then you know exactly which method
you're calling and what signature it has.

--
Greg


From tim at tdw.net  Sat Mar 31 11:32:19 2007
From: tim at tdw.net (Tim Williams)
Date: Sat, 31 Mar 2007 16:32:19 +0100
Subject: Is any way to split zip archive to sections?
In-Reply-To: <B69340568.8.6698.2@mxextra>
References: <B69340568.8.6698.2@mxextra>
Message-ID: <9afea2ac0703310832n45e9f566m47cb2eae4e58945b@mail.gmail.com>

On 30/03/07, Durumdara <durumdara at gmail.com> wrote:
> Hi!
>
> I want to create some backup archives with python (I want to write a backup
> application in Python).
> Some package managers (7z, arj, winzip) can create splitted archives (1
> mega, 650, 700 mega, etc).
>
> Because I want to ftp these results to a ftp server, I want to split large
> volumes to 15 mb sections.
>
> Can I do it with any python wrapper automatically (like in Cobian), or I
> need to create the large volume, and next split it with another tool?
>
> Or anybody knows about a command line tool (like 7z, or arj) that can expand
> the splitted archive (and I can add files with them from Python one by one)?
>

If you are iterating through a list of files to be backed up, and
adding them to a ZIP one-by-one then you could use something like this
 which adds each file until the zip is over 15mb - then it closes the
ZIP and creates the next one.

Not tested or optimised :)
---------------------------------------------------------------------------------------------------
import zipfile

archive_num = 1
outfile = zipfile.ZipFile('/zips/archive%s.zip' % archive_num, "w")
zsize = 0

for full_name in filelist:
    full_name_path = os.path.join(full_name, full_path)

    if zsize > 15728640 : # 15mb
        outfile.close()
        archive_num += 1
        outfile = zipfile.ZipFile('/zips/archive%s.zip' % archive_num, "w")
        zsize= 0

    outfile.write( full_name_path , full_name_path ,
zipfile.ZIP_DEFLATED) # add the file
    zsize += outfile.getinfo(full_name_path).compress_size #  get
compressed size of file

outfile.close()


From hg at nospam.org  Thu Mar 15 07:45:03 2007
From: hg at nospam.org (hg)
Date: Thu, 15 Mar 2007 12:45:03 +0100
Subject: looking for a simple crypto library
References: <mailman.5125.1173940891.32031.python-list@python.org>
	<7xfy86qxuv.fsf@ruckus.brouhaha.com>
Message-ID: <OBfKh.74847$Ju2.51310@newsfe16.lga>

Paul Rubin wrote:

> tlslite

cool !



From rhc28 at cornell.edu  Thu Mar 15 10:38:57 2007
From: rhc28 at cornell.edu (Rob Clewley)
Date: Thu, 15 Mar 2007 10:38:57 -0400
Subject: Box plot in Python
In-Reply-To: <167Kh.6054$Um6.1007@newssvr12.news.prodigy.net>
References: <mailman.5123.1173933486.32031.python-list@python.org>
	<167Kh.6054$Um6.1007@newssvr12.news.prodigy.net>
Message-ID: <a749952d0703150738p44fbae63vc90b2d5ef4b85d99@mail.gmail.com>

Matplotlib supports boxplots in a very straightforward fashion and is
reasonably documented (just google it!) I actually just submitted a
patch for extra boxplot features in matplotlib, which you can find on
the sourceforge patch tracker.
-Rob


From piyali.biswas at igib.res.in  Mon Mar 26 02:39:51 2007
From: piyali.biswas at igib.res.in (Piyali Biswas)
Date: Mon, 26 Mar 2007 12:09:51 +0530
Subject: cgi python
Message-ID: <1D011717865DAE46B56AA1455F02CAC5C0B384@n1ex>

Hi Christian,

I have seen your well-solved cgi-python answers. That's why I think you
would be able to answer my query related to the same.

I am writing a cgi program and placing it in cgi-bin folder of Apache
Server. Now I have written a python script in the same folder to
generate a graph 'genebarchart.py'. 

 

When I run this program from shell, i.e.,

C:\Program Files\Apache Group\Apache2\cgi-bin>python genebarchart.py

it runs well and creates the graph in htdocs folder as I save the graph
there using a save command within the python script, but when I use the
os.system command to call the python script within the cgi-code, i.e.,

os.system ("python genebarchart.py")

as both the scripts are in the same folder, it doesn't creates the graph
in htdocs folder. Can u please tell me why?

 

Thanks,

Piyali

 

 

 

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From steve at holdenweb.com  Wed Mar 14 08:49:11 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 08:49:11 -0400
Subject: Grep Equivalent for Python
In-Reply-To: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
Message-ID: <et8r2t$gtv$1@sea.gmane.org>

tereglow wrote:
> Hello all,
> 
> I come from a shell/perl background and have just to learn python.  To
> start with, I'm trying to obtain system information from a Linux
> server using the /proc FS.  For example, in order to obtain the amount
> of physical memory on the server, I would do the following in shell:
> 
> grep ^MemTotal /proc/meminfo | awk '{print $2}'
> 
> That would get me the exact number that I need.  Now, I'm trying to do
> this in python.  Here is where I have gotten so far:
> 
> memFile = open('/proc/meminfo')
> for line in memFile.readlines():
>     print re.search('MemTotal', line)
> memFile.close()
> 
> I guess what I'm trying to logically do is... read through the file
> line by line, grab the pattern I want and assign that to a variable.
> The above doesn't really work, it comes back with something like
> "<_sre.SRE_Match object at 0xb7f9d6b0>" when a match is found.
> 
> Any help with this would be greatly appreciated.
> Tom
> 
Regular expressions aren't really needed here. Untested code follows:

for line in open('/proc/meminfo').readlines:
     if line.startswith("Memtotal:"):
         name, amt, unit = line.split()
         print name, amt, unit
         break

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From deets at nospam.web.de  Mon Mar 12 11:58:25 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 16:58:25 +0100
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
Message-ID: <55lbl1F25geaaU1@mid.uni-berlin.de>

Bruno Desthuilliers wrote:

> Grant Edwards a ?crit :
> (snip)
> 
>> 
>> Python is _far_ more robust than C++.
>> 
> 
> I wouldn't say so - robustness is a quality of a program, not of a
> language !-)

Nope. Dealing with dangling references and double frees, complex
copy-semantics that change only by a feeble character or via overloaded and
thus hard to comprehend assignment operators are all properties of C++, and
tremendously afflict robustness IMHO.

Diez


From gagsl-py2 at yahoo.com.ar  Tue Mar 13 16:59:32 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 17:59:32 -0300
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
Message-ID: <op.to5a9icqx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 15:04:50 -0300, Drew <olsonas at gmail.com> escribi?:

> I'm currently writing a toy program as I learn python that acts as a
> simple address book. I've run across a situation in my search function
> where I want to iterate across a filtered list. My code is working
> just fine, but I'm wondering if this is the most "elegant" way to do
> this. Essentially, I'm searching the dict self.contacts for a key that
> matches the pattern entered by the user. If so, I print the value
> associated with that key. A pastie to the method is below, any help/
> advice is appreciated:
>
> http://pastie.caboo.se/46647
>
> Side note: I'm learning python after ruby experience. In ruby I would
> do something like:
>
> contacts.find_all{|name,contact| name =~ /search/}.each{|name,contact|
> puts contact}
>

Just a few changes:

def find(self, search):
     search_re = re.compile(search, re.IGNORECASE)
     for result in [self.contacts[name] for name in self.contacts if  
search_re.match(name)]:
         print result

- you can iterate directly over a dictionary keys using: for key in dict
- you can compile a regexp to re-use it in all loops; using re.IGNORECASE,  
you don't need to explicitely convert all to lowercase before comparing
- if all you want to do is to print the results, you can even avoid the  
for loop:

     print '\n'.join('%s' % self.contacts[name] for name in self.contacts  
if search_re.match(name))

-- 
Gabriel Genellina



From andre.ditador9999 at gmail.com  Sat Mar  3 11:46:09 2007
From: andre.ditador9999 at gmail.com (andre.ditador9999 at gmail.com)
Date: 3 Mar 2007 08:46:09 -0800
Subject: Randomizing in Python
Message-ID: <1172940368.958826.273260@j27g2000cwj.googlegroups.com>

     I want to randomize a certain calculation in Python but haven't
figured it out yet. To explain what i mean, I' m going to use an
example:
                        I want to get the numbers to do a random
experience database for a game. What would be necessary to do so?



From dickinsm at gmail.com  Sun Mar 11 15:46:08 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 12:46:08 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <1hut7xu.5zs31l1cohfybN%aleax@mac.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
Message-ID: <1173642367.926295.205400@64g2000cwx.googlegroups.com>

On Mar 11, 2:59 pm, a... at mac.com (Alex Martelli) wrote:
> [...]
> OTOH, Python 2.4 works just fine...:
>
> Python 2.4.3 (#1, Apr  7 2006, 10:54:33)
> [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.>>> 0.0,-0.0
> (0.0, -0.0)
> >>> -0.0,0.0
>
> (-0.0, 0.0)
>
> so it seems to be very specifically a 2.5 problem.

I've filed a bug report (bug #1678380) and got an impressively
quick response from MvL.  It looks like this is a `won't fix'.
Oh well.

Thanks for all your help.

Mark



From bernala at gmail.com  Mon Mar 26 16:49:16 2007
From: bernala at gmail.com (Al)
Date: 26 Mar 2007 13:49:16 -0700
Subject: Pycron for windows - please help
In-Reply-To: <mailman.5585.1174840952.32031.python-list@python.org>
References: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>
	<op.tpgjoo2dx6zn5v@gabriel2.softlabbsas.com.ar>
	<mailman.5341.1174402667.32031.python-list@python.org>
	<1174828667.754481.216350@e65g2000hsc.googlegroups.com>
	<mailman.5585.1174840952.32031.python-list@python.org>
Message-ID: <1174942155.971000.263140@e65g2000hsc.googlegroups.com>


> Mapped drives are per-user. Usually, services run under the LOCAL_SYSTEM
> account, not using the currently logged user (because they may start even
> before any user is logged). If you want the service to have access to your
> mapped drives, use the service control panel to make it run under another
> account.

Pycron runs under our domain admin account, and the computer on which
it runs is always on. I tried changing the account anyway, but no luck.



From sylvain at eugensystems.com  Wed Mar 14 13:57:57 2007
From: sylvain at eugensystems.com (Sylvain Defresne)
Date: Wed, 14 Mar 2007 18:57:57 +0100
Subject: Constructor of object
In-Reply-To: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
Message-ID: <45f837ba$0$6430$426a74cc@news.free.fr>

inline wrote:
> Hello!
> I want to assign self to object of parent class in constructor, like
> 
> def my_func():
>     ...
>     return ParentClass()
> 
> class MyClass (ParentClass):
>     def __init__(self):
>         self = my_func()
> 
> but it not work, because "object not initialized". What i can do?
> 

You want to override the __new__ function.


From gagsl-py2 at yahoo.com.ar  Thu Mar  1 18:49:52 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Mar 2007 20:49:52 -0300
Subject: xml minidom redundant children??
References: <1172774813.293437.108250@v33g2000cwv.googlegroups.com>
Message-ID: <op.toja5eybx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 01 Mar 2007 15:46:53 -0300, <bkamrani at gmail.com> escribi?:

> As a newbie, I'm trying to simply parse a xml file using minidom, but
> I don't know why I get some extra children(?). I don't know what is
> wrong in xml file, but I've tried different xml files, still same
> problem.

If you don't have to use exactly xml.dom.minidom, try using ElementTree  
http://www.effbot.org/zone/element-index.htm (it's already included with  
Python 2.5, for earlier versions you have to download and install it).
It's a lot easier and clean if you are mostly concerned about the infoset  
rather than its representation.

-- 
Gabriel Genellina



From tiarno at sas.com  Thu Mar 29 13:05:21 2007
From: tiarno at sas.com (Tim Arnold)
Date: Thu, 29 Mar 2007 13:05:21 -0400
Subject: encoding confusions
Message-ID: <eugrkh$7n7$1@foggy.unx.sas.com>

I have the contents of a file that contains French documentation.
I've iterated over it and now I want to write it out to a file.

I'm running into problems and I don't understand why--I don't get how the 
encoding works.
My first attempt was just this:
< snipped code for classes, etc; fname is string, codecs module loaded.>
< self.contents is the French file's contents as a single string >

tFile = codecs.open(fname,'w',encoding='latin-1', errors='ignore')
tFile.write(self.contents)
tFile.close()

ok, so that didn't work and I read some more and did this:
tFile.write(self.contents.encode('latin-1'))

but that gives me the same error
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe9 in position 48: 
ordinal not in range(128)

this is python2.4.1 (hpux)
sys.getdefaultencoding()
'ascii'

thanks,
--Tim Arnold




From aleax at mac.com  Thu Mar 29 21:58:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 18:58:44 -0700
Subject: Finding a module's sub modules at runtime
References: <460ab913$0$16387$88260bb3@free.teranews.com>
	<1175112265.427331.93340@o5g2000hsb.googlegroups.com>
	<460ac66a$0$16290$88260bb3@free.teranews.com>
	<1hvqae5.1alie2515sbssfN%aleax@mac.com>
	<460c01df$0$16410$88260bb3@free.teranews.com>
Message-ID: <1hvr2it.jmrhe215gail1N%aleax@mac.com>

Joshua J. Kugler <joshua at eeinternet.com> wrote:

> On Thursday 29 March 2007 07:33, Alex Martelli wrote:
> 
> > Joshua J. Kugler <joshua at eeinternet.com> wrote:
> > 
> >> still be nicely portable.  It just seems that since Python is gathering
> >> that information anyway, it should make it available without me having to
> >> walk the directory tree.
> > 
> > Sorry, where is Python "gathering that information anyway"?  Unless I'm
> > mistaken, Python by default does not walk directory trees of subpackages
> > -- what makes you think it does?
> 
> Hmm...right: dynamic language, runtime binding.  It would go out and find
> whether or not Module1.Module2 existed only when import was called.  Sorry,
> my bad.  I am assuming, however, that the help function walks the directory
> tree, or else I would not get output like this:
> 
> >>> import ModTest
> >>> help(ModTest)
> Help on package ModTest:
> 
> NAME
>     ModTest
> 
> FILE
>     /usr/local/lib/python2.4/site-packages/ModTest/__init__.py
> 
> PACKAGE CONTENTS
>     AModule
>     BModule
>     CModule
> 
> Thanks for the clarification.

Sure, pydoc (which help calls under the code) does that, with a nice mix
of inspect, os, and pkgutil.iter_modules calls.  pkgutil.iter_modules
may in fact be most of what you need:

>>> help(pkgutil.iter_modules)
Help on function iter_modules in module pkgutil:

iter_modules(path=None, prefix='')
    Yields (module_loader, name, ispkg) for all submodules on path,
    or, if path is None, all top-level modules on sys.path.
    
    'path' should be either None or a list of paths to look for
    modules in.
    
    'prefix' is a string to output on the front of every module name
    on output.

You will still have to call it recursively, though, I believe.


Alex


From jon+usenet at unequivocal.co.uk  Fri Mar 23 14:25:53 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 23 Mar 2007 18:25:53 GMT
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<4Rf*J7eGr@news.chiark.greenend.org.uk>
	<slrnf02rkt.4ef.jon+usenet@snowy.squish.net>
	<mailman.5500.1174626907.32031.python-list@python.org>
Message-ID: <slrnf086th.fk7.jon+usenet@snowy.squish.net>

In article <mailman.5500.1174626907.32031.python-list at python.org>, Gabriel Genellina wrote:
> Uh... I never thought it was an implied formula there - that F0 had to  
> come from 1.5 = 15 = 0xF.
> I think it should be stated much more clearly.

I'm not sure what you're saying. You are correct that the
documentation is rather vague. The 'f0' comes from 'final release'
I think.


From kushal.kumaran at gmail.com  Sat Mar 24 05:26:06 2007
From: kushal.kumaran at gmail.com (Kushal Kumaran)
Date: 24 Mar 2007 02:26:06 -0700
Subject: creating "jsp-like" tool with python
In-Reply-To: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>
References: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>
Message-ID: <1174728366.155455.144080@e65g2000hsc.googlegroups.com>

On Mar 24, 6:18 am, "jd" <chima... at gmail.com> wrote:
> I'd like to create a program that takes files with "jsp-like" markup
> and processes the embedded code (which would be python) to produce the
> output file.  There would be two kinds of sections in the markup file:
> python code to be evaluated, and python code that returns a value that
> would be inserted into the output.
>
> This seems like it would be straightforward in python, and maybe
> there's even a library that I could use for this, but as a newbie to
> Python, I don't know the landscape very well.  I am not looking for a
> big framework, just something small and simple that will do just this
> job.  Suggestions or pointers would be greatly appreciated.
>

Apache's mod_python already does something like this, with its PSP
handler.  See http://webpython.codepoint.net/mod_python

Maybe that would help.

--
Kushal Kumaran



From bignose+hates-spam at benfinney.id.au  Fri Mar 23 01:14:26 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 23 Mar 2007 16:14:26 +1100
Subject: Need help to learn Python
References: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
Message-ID: <87hcsc1qz1.fsf@benfinney.id.au>

"PythonBiter" <tpartha at gmail.com> writes:

> I'm very new in this Group as well Python language. I want to learn
> Python.

Welcome, and congratulations on your decision.

> So could you please advice me, and guide me how can i become master
> in Python !

Work through the Python Tutorial. This means: don't just read it, but
perform the exercises in order, and experiment with each one until you
understand what it does.

    <URL:http://docs.python.org/tut/>

-- 
 \     "I know you believe you understood what you think I said, but I |
  `\         am not sure you realize that what you heard is not what I |
_o__)                                  meant."  -- Robert J. McCloskey |
Ben Finney



From bearophileHUGS at lycos.com  Thu Mar 15 06:48:44 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 15 Mar 2007 03:48:44 -0700
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <et958a$o9c$1@news2.u-psud.fr>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
Message-ID: <1173955724.284863.97340@y80g2000hsf.googlegroups.com>

Laurent Pointal:
> you may prefer range/items when processing of the result
> value explicitly need a list (ex. calculate its length)

Creating a very long list just to know the len of an iterator is
barbaric, so sometimes I use this:

def leniter(iterator):
    if hasattr(iterator, "__len__"):
        return len(iterator)
    nelements = 0
    for _ in iterator:
        nelements += 1
    return nelements

Bye,
bearophile



From pyapplico at gmail.com  Fri Mar 30 03:14:20 2007
From: pyapplico at gmail.com (pyapplico at gmail.com)
Date: 30 Mar 2007 00:14:20 -0700
Subject: Remote XML Parsing
Message-ID: <1175238860.680426.134400@y80g2000hsf.googlegroups.com>

How can I parse a remote XML file with Python?
And what will I be able to do with this XML file in Python?

Sorry if this is a noob-ish question.



From gagsl-py2 at yahoo.com.ar  Sat Mar 24 21:26:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 Mar 2007 22:26:08 -0300
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.23.46.15@mailinator.com>
Message-ID: <op.tpp0xunnx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 24 Mar 2007 20:46:15 -0300, Mark <mark at mailinator.com> escribi?:

> The above doesn't actually work for my test script. I have an atexit
> call in the script which is deleting some temp files and I get the
> following traceback on termination when run with the above:
>
> Error in atexit._run_exitfuncs:
> Traceback (most recent call last):
>   File "atexit.py", line 24, in _run_exitfuncs
>     func(*targs, **kargs)
>   File "/home/mark/bin/myscript.py", line 523, in delete
>     if files.tempdir:
> AttributeError: 'NoneType' object has no attribute 'tempdir'

I don't know exactly what happened so it doesn't work anymore (and it  
worked before) but script finalization is always a bit fragile. All values  
in all modules dictionaries (holding globals) are set to None (presumably  
to help garbage collection by breaking cycles). When your delete function  
is called, globals like shutil or files are already gone. A way to avoid  
this problem is to hold a reference to all required globals, so your  
delete function would become:

      @staticmethod
      def delete(files=files,rmtree=shutil.rmtree):
  	'''Called to delete all temp files'''
  	if files.tempdir:
  	    rmtree(files.tempdir)

But I'm not sure if this is enough because rmtree relies on the os module  
to do its work.

-- 
Gabriel Genellina



From arkanes at gmail.com  Mon Mar  5 12:15:13 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 5 Mar 2007 11:15:13 -0600
Subject: Project organization and import
In-Reply-To: <1173112353.210937.214020@v33g2000cwv.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
Message-ID: <4866bea60703050915g36a6cd0ck3bb343e89c6fb64f@mail.gmail.com>

On 5 Mar 2007 08:32:34 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> Jorge, thanks for your response. I replied earlier but I think my
> response got lost. I'm trying again.
>
> On Mar 4, 5:20 pm, Jorge Godoy <jgo... at gmail.com> wrote:
> > Why?  RCS systems can merge changes.  A RCS system is not a substitute for
> > design or programmers communication.
>
> Text merges are an error-prone process. They can't be eliminated but
> they are best avoided when possible.
>
> When refactoring, it's much better to move small files around than to
> move chunks of code between large files. In the former case your SCM
> system can track integration history, which is a big win.
>
> > Unit tests help being sure that one change doesn't break the project as a
> > whole and for a big project you're surely going to have a lot of those tests.
>
> But unit tests are never an excuse for error prone workflow. "Oh,
> don't worry, we'll catch that with unit tests" is never something you
> want to say or hear.
>

That's actually the exact benefit of unit testing, but I don't feel
that you've actually made a case that this workflow is error prone.
You often have multiple developers working on the same parts of the
same module?

> > I don't reload...  When my investigative tests gets bigger I write a script
> > and run it with the interpreter.  It is easy since my text editor can call
> > Python on a buffer (I use Emacs).
>
> That's interesting, is this workflow pretty universal in the Python
> world?
>
> I guess that seems unfortunate to me, one of the big wins for
> interpreted languages is to make the development cycle as short and
> interactive as possible. As I see it, the Python way should be to
> reload a file and reinvoke the class directly, not to restart the
> interpreter, load an entire package and then run a test script to set
> up your test conditions again.

If you don't do this, you aren't really testing your changes, you're
testing your reload() machinery. You seem to have a lot of views about
what the "Python way" should be and those are at odds with the actual
way people work with Python. I'm not (necessarily) saying you're
wrong, but you seem to be coming at this from a confrontational
standpoint.

Your claim, for example, that the language shouldn't place constraints
on how you manage your modules is questionable. I think it's more
likely that you've developed a workflow based around the constraints
(and abilities) of other languages and you're now expecting Python to
conform to that instead of its own.

I've copied some of your responses from your earlier post below:

>Yes. I've worked extensively on several projects in several languages
>with multi-million lines of code and they invariably have coding
>styles that recommend one functional unit (such as a class), or at
>most a few closely related functional units per file.

I wonder if you've ever asked yourself why this is the case. I know
from my own experience why it's done in traditional C++/C environments
- it's because compiling is slow and breaking things into as many
files (with as few interdependencies) as possible speeds up the
compilation process. Absent this need (which doesn't exist in Python),
what benefit is there to separating out related functionality into
multiple files? Don't split them up just because you've done so in the
past - know why you did it in the past and if those conditions still
apply. Don't split them up until it makes sense for *this* project,
not the one you did last year or 10 years ago.

>I guess my question boils down to this. Is "from foo import *" really
>deprecated or not? If everyone has to use "from foo import *" despite
>the problems it causes, how do they work around those problems (such
>as reloading)?

from foo import * is a bad idea at a top level because it pollutes
your local namespace. In a package __init__, which exists expressly
for the purpose of exposing it's interior namespaces as a single flat
one, it makes perfect sense. In some cases you don't want to export
everything, which is when __all__ starts to make sense. Clients of a
package (or a module) shouldn't use from foo import * without a good
reason. Nobody I know uses reload() for anything more than trivial "as
you work" testing in the interpreter. It's not reliable or recommended
for anything other than that. It's not hard to restart a shell,
especially if you use ipython (which can save and re-create a session)
or a script thats set up to create your testing environment. This is
still a much faster way than compiling any but the most trivial of
C/C++ modules. In fact, on my system startup time for the interpreter
is roughly the same as the "startup time" of my compiler (that is to
say, the amount of time it takes deciding what its going to compile,
without actually compiling anything).

>You're still stuck doing foo.Foo() everywhere in your client code,
>which is ugly and wastes space, or using "from foo import *" which is
>broken.

If you don't like working with explicit namespaces, you've probably
chosen the wrong language. If you have a specific name (or a few
names) which you use all the time from a module, then you can import
just those names into your local namespace to save on typing. You can
also alias deeply nested names to something more shallow.

>For myriad reasons, just one of them being the one I stated -- smaller
>files with one functional unit each are more amenable to source code
>management with multiple developers.

I propose that the technique most amenable to source code management
is for a single file (or RCS level module, if you have a locking RCS)
to have everything that it makes sense to edit or change for a
specific feature. This is an impossible goal in practice (because you
will inevitably and necessarily have intermodule dependencies) but
your developers don't write code based around individual files. They
base it around the systems and the interfaces that compose your
project. It makes no more sense to arbitrarily break them into
multiple files than it does to arbitrarily leave them all in a single
file.

In summary: I think you've bound yourself to a style of source
management that made sense in the past without reanalyzing it to see
if it makes sense now. Trust your judgment and that of your developers
when it comes to modularization. When they end up needing to merge all
the time because they're conflicting with someone else's work, they'll
break things up into modules.

You're also placing far too much emphasis on reload. Focus yourself on
unit tests and environment scripts instead. These are more reliable
and easier to validate than reload() in a shell.


From no at spam.fr  Fri Mar 23 04:32:09 2007
From: no at spam.fr (ian)
Date: Fri, 23 Mar 2007 09:32:09 +0100
Subject: Problem with time
References: <4602bc27$0$9709$426a74cc@news.free.fr>
	<mailman.5482.1174589514.32031.python-list@python.org>
Message-ID: <4603905c$0$7499$426a74cc@news.free.fr>


"Steve Holden" <steve at holdenweb.com> a ?crit dans le message de news:
mailman.5482.1174589514.32031.python-list at python.org...
> import time
> import datetime
>
> dbtd = <timedelta from database>
> h, m, s = time.localtime()[3:6]
> timenow = s + (60 * (m + 60 * h))

Look like ok, thanks all :)




From trentm at activestate.com  Tue Mar 13 17:35:06 2007
From: trentm at activestate.com (Trent Mick)
Date: Tue, 13 Mar 2007 14:35:06 -0700
Subject: ANN: ActivePython 2.5.0.0 is now available
In-Reply-To: <1115a2b00703131400n1c3334cbh56ce27b4009be2bd@mail.gmail.com>
References: <45F701E4.4080404@activestate.com>
	<1115a2b00703131400n1c3334cbh56ce27b4009be2bd@mail.gmail.com>
Message-ID: <45F7190A.8060907@activestate.com>

Yes.

Wensui Liu wrote:
> Is it free of charge?
> 
> On 3/13/07, Trent Mick <trentm at activestate.com> wrote:
>>...
>> ActivePython is ActiveState's binary distribution of Python. Builds for
>> Windows, Mac OS X, Linux, HP-UX and AIX are made freely available.
>>...



From nagle at animats.com  Sat Mar 10 19:28:06 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 11 Mar 2007 00:28:06 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <87tzwszmdc.fsf@pobox.com>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
	<IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
	<87tzwszmdc.fsf@pobox.com>
Message-ID: <q2IIh.9177$jx3.4870@newssvr25.news.prodigy.net>

John J. Lee wrote:
> John Nagle <nagle at animats.com> writes:
> 
> 
>>skip at pobox.com wrote:
>> > The distutils setup.py script checks for ncurses bits
>>
>>    No, it just plows on after compiler errors.

> Red Hat has traditionally been painful with Python.  
...

> Also there's the traditional open source problem (this one by no means
> restricted to Python, or even to open-source OSes -- I suffered this
> on Solaris recently) of distros splitting software up and generally
> "knowing better" than the maintainer. 

    Hit that with OpenSSL.  Red Hat took elliptical curve cryptography
out of Fedora 6 for patent reasons.  With that missing, M2Crypto won't
build.  It ought to; the implementor of M2Crypto thought of that, because
it's an optional feature.  But M2Crypto uses SWIG.  SWIG doesn't normally
process nested include files.  OpenSSL had changed their configuration
approach to use nested include files.  So SWIG didn't see the #define that
said to turn off elliptical curve crypto support.  This resulted in
compile errors in the 24,000 lines of code that come out of SWIG.

    Three days of work to figure that out.

				John Nagle


From steve at holdenweb.com  Sat Mar 17 06:48:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 17 Mar 2007 06:48:09 -0400
Subject: import error
In-Reply-To: <op.tpbvd5n1x6zn5v@gabriel2.softlabbsas.com.ar>
References: <BAY24-F8C0E318059EB1D9167F18A4700@phx.gbl>
	<op.tpbvd5n1x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <45FBC769.5070203@holdenweb.com>

Gabriel Genellina wrote:
> En Fri, 16 Mar 2007 23:49:43 -0300, Nick Burns <theodoremouse at hotmail.com>  
> escribi?:
> 
>> Quick question. I am running python on windows xp. i want to import my  
>> own
>> module "mymod". However, when I try to import it i get the error message  
>> "ImportError:
>> no module named mymod".
>>
>> "mymod" is located in a directory that is part of the computer's "path"  
>> env
>> variable. Imports fine if 'mymod' is in the current working directory,  
>> but not
>> otherwise. i had thought that by saving 'mymod'within my normal path  
>> that it
>> would import successfully, but this is not the case.
> 
> Python does not use the system PATH environment variable. Doing this:
> 
> import sys
> print sys.path
> 
> you will see the list of directories that Python would try. Try saving  
> your module inside site-packages.
> 

Or investigate appropriate settings of the PYTHONPATH environment 
variable, whose elements will be added to sys.path at interpreter 
startup. The "path" environment variable is for locating executables, 
not Python libraries.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 17:03:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 19:03:14 -0300
Subject: is this a bug? (python 2.3)
References: <1173472337.094165.65510@8g2000cwh.googlegroups.com>
	<1173473033.3450.81.camel@dot.uniqsys.com>
Message-ID: <op.toxzjo1ex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 09 Mar 2007 17:43:53 -0300, Carsten Haese <carsten at uniqsys.com>  
escribi?:

>> class warfare:
>>     def __init__(self): self.pairs = [[0,0]]*2
>>     def __str__(self): return str(self.pairs)
>>     def setfirst (self,i,value): self.pairs[i][0] = value
>>     def setsecond(self,i,value): self.pairs[i][1] = value
>
> http://www.python.org/doc/faq/programming/#how-do-i-create-a-multidimensional-list

Also see this more general topic:
http://www.python.org/doc/faq/general/#why-are-default-values-shared-between-objects

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Tue Mar 20 04:50:09 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Mar 2007 08:50:09 GMT
Subject: Anything available that can read Microsoft .MDB files from Python?
References: <1174334517.125928.274140@l75g2000hse.googlegroups.com>
	<mailman.5298.1174336352.32031.python-list@python.org>
Message-ID: <Xns98F9599A9C072duncanbooth@127.0.0.1>

"Terry Reedy" <tjreedy at udel.edu> wrote:

> 
><kyosohma at gmail.com> wrote in message 
> news:1174334517.125928.274140 at l75g2000hse.googlegroups.com...
>| I've read .MDB files using ODBC. I don't know how big your files are,
>| but I had a file with almost 3000 rows and I was able to fetch it in
>| 1-2 seconds. If you want to give it whirl, you just need to create an
>| ODBC connection and then do the following:
> 
> I'll just mention that OpenOffice.org Base can make ODBC connections and 
> output in several formats.  Don't know if their ODBC works with .MDB.
> 

I just tried opening an mdb file from Open Office under Ubuntu. No problems 
whatsoever except that the pulldown for 'Connect to an existing database' 
listed 'Microsoft Access' twice. (This was a completely standard, never 
before run, copy of Base.)




From lled at blueyonder.co.uk  Wed Mar 14 16:58:19 2007
From: lled at blueyonder.co.uk (lled)
Date: Wed, 14 Mar 2007 20:58:19 GMT
Subject: windows blinds
Message-ID: <op.to65qlokogvny5@gazeebo>

i am new to python and wanted to know
could i use it to write a programme so when i double click on a windoz  
window it collapses (like in linux)?

-- 
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/


From steve at holdenweb.com  Tue Mar 20 21:12:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 20 Mar 2007 21:12:28 -0400
Subject: Imports
In-Reply-To: <1174437849.387794.221130@y66g2000hsf.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>	<1174437234.349310.304400@l77g2000hsb.googlegroups.com>
	<1174437849.387794.221130@y66g2000hsf.googlegroups.com>
Message-ID: <etq0sf$gls$1@sea.gmane.org>

7stud wrote:
> On Mar 20, 6:33 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
>> On Mar 20, 12:51 pm, kyoso... at gmail.com wrote:
>>
>>> I typically just import sys and then do a
>>> sys.path.append(directoryPath). This basically makes whatever modules
>>> in that path available at run time. If you need a beginners reference
>>> book, I recommend "Beginning Python" by Hetland. "Python Programming
>>> for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
>>> get into the internals of the language like Hetland does. Once you're
>>> a snake charmer too, you can "graduate" to the "Programming Python"
>>> book by Lutz.
>>> Mike
>> I can't access any modules using the sys.path.append() method.  Here
>> is my directory structure:
>>
>> /
>> ----Users
>> ---------Me
>> ------------2testing
>> ------------------dir1
>> ---------------------test1.py
>> ---------------------programs_python
>> -----------------------------testA.py
>>
>> testA.py:
>> ------------------------
>> def show(x):
>>         print x
>>
>> if __name__ == "__main__":
>>         show("hello")
>> ------------------------
>>
>> test1.py:
>> ------------------------
>> import sys
>>
>> sys.path.append("/Users/Me/2testing/dir1/programs_python")
>> testA.show("hello")
>> ------------------------
>>
>> command:
>> ~/2testing/dir1$ python test1.py
>>
>> output:
>> Traceback (most recent call last):
>>   File "test1.py", line 4, in ?
>>     testA.show("hello")
>> NameError: name 'testA' is not defined
>>
>> Any idea how to do that?
> 
> Hmmm...I got it to work like this:
> 
> test1.py:
> ---------
> import sys
> sys.path.append("/Users/Me/2testing/dir1/programs_python")
> 
> import testA
> testA.show("hello")
> 
That's how it's s'posed to work. You still have to explicitly import the 
modules you want - the sys.path just tells Python where to look for them.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From gnewsg at gmail.com  Mon Mar  5 08:48:07 2007
From: gnewsg at gmail.com (billiejoex)
Date: 5 Mar 2007 05:48:07 -0800
Subject: ANN: pyftpdlib 0.1 released
Message-ID: <1173102487.497056.48190@s48g2000cws.googlegroups.com>

Hi all,
I'm proud to announce the first beta release of pyftpdlib available at
the following urls:

home: http://billiejoex.altervista.org/pyftpdlib.html
google code: http://code.google.com/p/pyftpdlib/

About
=====

pyftpdlib is an high-level FTP server library based on asyncore/
asychat frameworks.
pyftpdlib is actually the most complete RFC959 FTP server
implementation available for Python language.

Requirements
==========

Python 2.2 or higher

Bug reports / Contacts
================

billiejoex -_[@]_- gmail (dot) com



From grflanagan at yahoo.co.uk  Wed Mar  7 04:00:32 2007
From: grflanagan at yahoo.co.uk (Ger Flanagan)
Date: Wed, 7 Mar 2007 09:00:32 +0000 (GMT)
Subject: Any module to parse httpd.conf?
In-Reply-To: <82d28c40703060622o32f2ec24q51fa7b7fb9a70971@mail.gmail.com>
Message-ID: <826795.49016.qm@web23402.mail.ird.yahoo.com>


On 6 Mar 2007 02:03:33 -0800, Gerard Flanagan <grflanagan at yahoo.co.uk> >>wrote: Hello,
>>
>>Does anyone know of an existing module to parse httpd.conf files?
>>
>>Thanks.

Jeff McNeil <jeff at jmcneil.net> wrote:> I looked at http://www.python.org/pypi/httpdrun not so long ago, it > > > might be able to do what you want. I think it was a bit hard to read.  > > Remember that with Apache you (may) also need to worry about > > > configuration merges and whatnot (<Directory>, <VirtualHost>, .htaccess, and so on...).  

> What specifically do you want to do? There are a lot of ways to do a > lot of things with Apache.  If you're looking to create virtual hosts, take a look at mod_vhost_alias or some RewriteRule magic.  You're > configuration could be pretty simplified and reduced to updating a gdbm > file or creating a directory? 

Jeff



 Thanks Jeff,

At the minute I'm creating a httpd.conf from a template, but at some point the procedure will be completely automated and I may need to merge a generated httpd.conf with an existing one. (This is IHS but I'm told it's identical to Apache as far as httpd.conf is concerned). I don't know where gdbm fits in but I'll look into it.

Thanks for the reply.

Gerard

 		
---------------------------------
 New Yahoo! Mail is the ultimate force in competitive emailing. Find out more at the Yahoo! Mail Championships. Plus: play games and win prizes.
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From likwoka at gmail.com  Tue Mar  6 21:47:44 2007
From: likwoka at gmail.com (Alex Li)
Date: 6 Mar 2007 18:47:44 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173212452.810851.89210@j27g2000cwj.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
	<1173212319.214424.320090@64g2000cwx.googlegroups.com>
	<1173212452.810851.89210@j27g2000cwj.googlegroups.com>
Message-ID: <1173235664.060494.195300@q40g2000cwq.googlegroups.com>

On Mar 6, 3:20 pm, "Istvan Albert" <istvan.alb... at gmail.com> wrote:
>
> https://networkx.lanl.gov/wiki/pygraphviz

Thanks Albert.  I looked into pygraphviz as well but it requires
compiling C extension, and there is no Windows compilation instruction
(though it probably won't be hard).



From jhefferon at smcvt.edu  Wed Mar 14 15:51:04 2007
From: jhefferon at smcvt.edu (Jim)
Date: 14 Mar 2007 12:51:04 -0700
Subject: command line arguments using subprocess
Message-ID: <1173901864.230335.19530@d57g2000hsg.googlegroups.com>

Hello,

I'm trying to use subprocess to drive a Perl script.  I'm having some
trouble getting it to spot the command line arguments.  Basically, if
I call subprocess(args).wait() where args has a second item, I can't
convince the Perl script to see it.  Below is a pretty small example.
If someone could get me unstuck, I'd appreciate it.  (Python 2.4.4c1,
if that helps.)

Thanks,
Jim


................. /home/ftpmaint/test.pl................
#!/usr/bin/env perl
print "\$0 is -->$0<--\n";
print "\$ARGV[0] is -->$ARGV[0]<--\n";

die "usage: $0 PKGNAME\n" unless @ARGV == 1;


.............../home/ftpmaint/subtest.py.................
import os,subprocess

args=['/home/ftpmaint/test.pl','a']
p=subprocess.Popen(args,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,cwd=os.getcwd())
retCode=p.wait()
print "retCode=",retCode
print "stdout>>",p.stdout.read()
print "stderr>>",p.stderr.read()


........... some command line work ..............
ftpmaint at millstone:~$ ./test.pl
$0 is --./test.pl--
$ARGV[0] is --><--
usage: ./test.pl PKGNAME

ftpmaint at millstone:~$ ./test.pl a
$0 is --./test.pl--
$ARGV[0] is -->a<--

ftpmaint at millstone:~$ python subtest.py
retCode= 255
stdout= $0 is --/home/ftpmaint/test.pl--
$ARGV[0] is --><--



From seberino at spawar.navy.mil  Tue Mar  6 01:18:23 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 5 Mar 2007 22:18:23 -0800
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
Message-ID: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>

The following web page puts a report in a *popup window* by clicking
the "Generate Report" button....

http://moneycentral.msn.com/investor/research/printrep.asp?Symbol=BBBY

How can I grab this pop window page in a python script? (It doesn't
seem to have a URL!?!)

chris



From scott.daniels at acm.org  Thu Mar 29 22:37:29 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 29 Mar 2007 18:37:29 -0800
Subject: Creating a new data structure while filtering its data origin.
In-Reply-To: <mailman.5727.1175117350.32031.python-list@python.org>
References: <mailman.5727.1175117350.32031.python-list@python.org>
Message-ID: <130ottff7f69d71@corp.supernews.com>

mmara at fibertel.com.ar wrote:
> Hi everyone.
> 
> I'm trying to work with very simple data structures but I'm stuck in the very first steps. If someone has the luxury of a few minutes and can give an advice how to resolve this, I'll really appreciate it.
> 
> 1- I have a list of tuples like this:
> lista= [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2), (168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203, 141, 1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568, 142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]
> and I want to end with a dict like this:
> {141: {1: [203, 213, 201], 2: [168, ], 3: [162, ]}, 142: {1: [503, 513, 501], 2: [568, ], 4: [562, ]}}
>  the logic of the final output:
>  a) the outer dict's key is a set() of the 2rd value of the input.
>  b) the inner dict's key is a set() of the 3th value for tuples which 3rd value equals a). 
>  c) the inner list will be fill up with the 1st value of every tuple which 3rd value equals b) and its 2rd value equals a).
> 
> So far, the only thing it seems I can achieve is the first part:
> outer_dict = dict([(x,dict()) for x in set(row[1] for row in lista)])
> 
>>From then on, I'm starting to get tired after several successful failures (I tried with itertools, with straight loops ...) and I don't know which can be the easier way to get that final output.
> 
> Thanks in advance.
> 
> 
     lista, wanted = ...
     result = {}
     for a,b,c in lista:
         inner = result.setdefault(b, {}).setdefault(c, [])
         if a not in inner:
             inner.insert(0, a)  # I had used append, but ...
     print result == wanted

--Scott David Daniels
scott.daniels at acm.org


From duncan.booth at invalid.invalid  Mon Mar 19 06:06:09 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 Mar 2007 10:06:09 GMT
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<Xns98F859E7ECA07duncanbooth@127.0.0.1>
	<1174296498.932354.17950@d57g2000hsg.googlegroups.com>
Message-ID: <Xns98F866BD222B7duncanbooth@127.0.0.1>

"momobear" <wgwigw at gmail.com> wrote:

> thanks for help:), I am puzzled about if I have to use try and except
> to determine it. finnal code should like this?
>  class coffee:
>          def __init__(self):
>               '''
>               do something here
>               '''
>          def  boil(self):
>                self.temp = 80
> 
> a = coffer()
> try:
>     if a.temp > 60:
>         print "it's boiled"
> except AttributeError:
>     print "it's not boiled"

No, you should simply do the first of the options I suggested. i.e. 
initialise the value

class coffee:
   def __init__(self):
    	self.temp = 20

   def boil(self):
      self.temp = 80

a = coffee()
if a.temp > 60:
   print "it's boiled"
else:
   print "it's not boiled"


From kyosohma at gmail.com  Thu Mar 22 15:58:47 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 22 Mar 2007 12:58:47 -0700
Subject: How can I tar each sub-directories inside a directory
In-Reply-To: <1174589016.152380.161990@n76g2000hsh.googlegroups.com>
References: <1174589016.152380.161990@n76g2000hsh.googlegroups.com>
Message-ID: <1174593527.556304.237420@y66g2000hsf.googlegroups.com>

On Mar 22, 1:43 pm, "ying... at gmail.com" <ying... at gmail.com> wrote:
> Hi,
> how can I do
> * for each sub-directory of  the current directory
> * tar that to a tar file
> * remove that sub-directory

Grab the directories with the glob module and read them into a list.
Use a for loop to loop over them and the tar module (tarfile) or pytar
(see below for link) to write them to a tar file. Finally, use
os.remove or the shutil module to delete the directories.

http://sourceforge.net/projects/pytar/

Mike



From steve at holdenweb.com  Thu Mar 22 09:11:14 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 09:11:14 -0400
Subject: Removing a particular index from a list
In-Reply-To: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
References: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
Message-ID: <ettvc4$urh$1@sea.gmane.org>

Srikanth wrote:
> Hi,
> 
> list.remove(item) removes the first item from the list, but how do I
> say to remove a particular index from a list without using it's value?
> 
> Let's say I have 4 items in my list as
> 
>>>> li = ["sri", "s", "srikanth", "s"]
> 
> And if I want to remove the last item ("s"), how do I remove it?
> li.remove(-1) doesn't do it. This is my problem.
> 
  >>> li = ["sri", "s", "srikanth", "s"]
  >>> del li[-1]
  >>> li
['sri', 's', 'srikanth']
  >>>

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From steven.klass at gmail.com  Tue Mar 20 16:23:44 2007
From: steven.klass at gmail.com (rh0dium)
Date: 20 Mar 2007 13:23:44 -0700
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <etpcon$1g8r$1@ulysses.news.tiscali.de>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
Message-ID: <1174422224.028566.34940@l77g2000hsb.googlegroups.com>

On Mar 20, 12:30 pm, Stargaming <stargam... at gmail.com> wrote:
>
> from sys import version_info
> if version_info[0] < 2 or version_info[1] < 4:
>      raise RuntimeError("You need at least python2.4 to run this script")

This is great!!

>
> IMO you shouldn't struggle with it too hard. If the user's python
> version is not appropriate, don't hack its interpreter mechanism to do
> the work you need. Anyways, you should not check for specific python
> versions but for modules/APIs/builtins whatever and *then* you may raise
> an exception pointing the user to the fact that is python version does
> not fit your needs.

I agree but where do you raise the exception?  Quite frankly it's
silly to kill the whole app when a bunch of debug lines won't print
and shouldn't except by the developer..
In other words is what you propose the right way to solve this for
modules which were'nt included in older python releases?  Or should I
be doing something different and if so what should I do?  I like the
solution you give - it will work for everything I do - but is it smart
to retrofit this into all of my old code?  What is the clean way to
solve this?

Just want to do this the right way.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  2 11:40:36 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 02 Mar 2007 17:40:36 +0100
Subject: Sorting strings containing special characters (german 'Umlaute')
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>
	<hbf.20070302v8dv@bombur.uio.no>
Message-ID: <54r2c4F21fssbU1@mid.individual.net>

Hallvard B Furuseth wrote:
> DierkErdmann at mail.com writes:

>> For sorting the letter "?" is supposed to be treated like "Ae",
>> therefore sorting this list should yield
>> l = ["Aber, "?rger", "Beere"]
> 
> Are you sure?  Maybe I'm thinking of another language, I thought ?
> shold be sorted together with A, but after A if the words are
> otherwise equal.

In German, there are some different forms:

- the classic sorting for e.g. word lists: umlauts and plain vowels
are of same value (like you mentioned): ? = a

- name list sorting for e.g. phone books: umlauts have the same
value as their substitutes (like Dierk described): ? = ae

There are others, too, but those are the most widely used.

Regards,


Bj?rn

-- 
BOFH excuse #277:

Your Flux Capacitor has gone bad.



From wahab-mail at gmx.de  Thu Mar 29 20:33:55 2007
From: wahab-mail at gmx.de (Mirco Wahab)
Date: Fri, 30 Mar 2007 02:33:55 +0200
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <euhir1$ksq$1@daisy.noc.ucla.edu>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<euhir1$ksq$1@daisy.noc.ucla.edu>
Message-ID: <euhm8b$7r8$1@mlucom4.urz.uni-halle.de>

James Stroud wrote:

there's a serious bug waiting here

> This idiot is a troll. This idiot is a troll. ThThis idiot is a troll. 
> This idiot is a troll. is idiot is a troll. This idiot is a troll. This 

Remember, rockets went back to earth on such things (in pieces) ...

> idiot is a troll. This idiot is a troll. This idiot is a troll. This 

better use Xah's "functional paradigm" combined
with his most hated religion instead:


     print "This idiot is a troll. " x 42



Regards & f'up c.l.java.p

Mirco


From richardjones at optushome.com.au  Fri Mar 30 17:55:23 2007
From: richardjones at optushome.com.au (Richard Jones)
Date: Sat, 31 Mar 2007 07:55:23 +1000
Subject: Cheeseshop needs mirrors
References: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>
	<1175249588.897793.24450@o5g2000hsb.googlegroups.com>
Message-ID: <460d874b$0$5746$afc38c87@news.optusnet.com.au>

Paul Boddie wrote:
> On 30 Mar, 09:05, "Jon" <chai... at gmail.com> wrote:
>>
>> If something as widely used as eggs is going to have a single point of
>> failure like the Cheeseshop, we can't have it going down.
>>
>> I'm sure there are other solutions, but my suggestion is simply to
>> have mirrors. It works for Debian, after all.
> 
> It was said that the setuptools stuff could work with simple package
> index sites using static Web pages, and these could be mirrors of the
> main package index, but I suppose it's time once again to remind
> anyone wanting to reinvent package/dependency-management tools to take
> another look at what's already been done in the domain. As you say, it
> works for Debian.

And of course I'll reiterate the same line I always do: the Cheese Shop was
set up by a volunteer, enhanced by some other volunteers and exactly
nothing more will get done unless more volunteers offer their time.


    Richard



From bruno.desthuilliers at gmail.com  Fri Mar  2 07:40:39 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 2 Mar 2007 04:40:39 -0800
Subject: Questions about app design - OOP with python classes
In-Reply-To: <pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
Message-ID: <1172839239.366627.136880@j27g2000cwj.googlegroups.com>

On 2 mar, 05:14, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> On Thu, 01 Mar 2007 21:45:55 +0100, Bruno Desthuilliers wrote:
> > As a side note : hungarian notation is usually considered bad form here.
> > Look here for usual naming conventions:
> >http://www.python.org/dev/peps/pep-0008/
>
> Which Hungarian notation do you mean?
>
> If you mean the Windows "Systems Hungarian",

Yes. And don't tell, I know it's a totally braindead application of a
somewhat less braindead idea.




From mailmaverick666 at gmail.com  Tue Mar  6 07:09:27 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Tue, 6 Mar 2007 17:39:27 +0530
Subject: Device Drivers in python(kernel modules)
Message-ID: <180b672e0703060409i7eca1b65se10923c79a8f5b23@mail.gmail.com>

I am not much of a kernel programmer , I have a requirement to shift a
python code to work as a kernel module.
So I was just wondering whether we can write a kernel module in python.
A thought is that if we can somehow convert python code into a C object code
then it can be done.
Can some one suggest something..anything

-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From jgodoy at gmail.com  Sun Mar  4 07:20:26 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 04 Mar 2007 09:20:26 -0300
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<mailman.4646.1173006490.32031.python-list@python.org>
Message-ID: <87slcl42ut.fsf@gmail.com>

"Troy Melhase" <troy.melhase at gmail.com> writes:

> You're trying to install a package without using the package
> management tools provided by your system, you haven't read the docs
> (or at least all of them), you show a general lack of understanding of
> the different responsibilities in the free/open source software space
> (development vs. packaging)... and after all that, then you come here
> and complain?

Just to throw more on the fire: there are distributions that come with Python
2.5 packaged and working. ;-)

> Look, I'm sure lots of folks here would be glad to help you, but your
> post comes across as whiny and confrontational.  I'm sure you've had a
> frustrating experience, but please, don't blame "python" or "the
> python developers", because that blame would be misplaced.

Anyway, if following the install after an error is true then some developer
should take a look at it.


-- 
Jorge Godoy      <jgodoy at gmail.com>


From dudaraster at gmail.com  Wed Mar  7 07:40:26 2007
From: dudaraster at gmail.com (Aviroce)
Date: Wed, 07 Mar 2007 12:40:26 +0000
Subject: *** CANADIAN ANTI-TERROR LAW HAS BEEN STRUCK DOWN BY ITS
	HONORABLE SUPREME COURT UNANIMOUSLY *** (REPOST)
In-Reply-To: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
References: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
Message-ID: <repost.92106.1172691920.663009.111260@j27g2000cwj.googlegroups.com>

On Feb 24, 11:22 am, stj... at rock.com wrote:
> Canada anti-terror law is struck down>From the Associated Press
>
> February 24, 2007
>
> OTTAWA - Canada's Supreme Court on Friday unanimously declared it
> unconstitutional to detain foreign terrorism suspects indefinitely
> while the courts review their deportation orders.
>
> Five Arab Muslim men have been held for years under the "security
> certificate" program, which the Justice Department has said is a key
> tool in the fight against global terrorism and essential to Canada's
> security.
>
> The court found that the system violated the Charter of Rights and
> Freedoms, Canada's bill of rights. However, it suspended its ruling
> for a year to give Parliament time to rewrite the part of the
> Immigration and Refugee Protection Act that covers the certificate
> process.
>
> The security certificates were challenged by three men from Morocco,
> Syria and Algeria - all alleged by the Canadian Security Intelligence
> Service to have ties to terrorist networks.
>
> The men have spent years in jail while fighting deportation orders.
>
> They risk being labeled terrorists and sent back to their native
> countries, where they say they could face torture.
>
> The court said the treatment of the suspects was a violation of their
> rights.
>
> "The overarching principle of fundamental justice that applies here is
> this: Before the state can detain people for significant periods of
> time, it must accord them a fair judicial process," Chief Justice
> Beverley McLachlin wrote in a ruling for all nine justices.
>
> "The secrecy required by the scheme denies the person named in a
> certificate the opportunity to know the case put against him or her,
> and hence to challenge the government's case," she said.
>
> The challenged law allows sensitive intelligence to be heard behind
> closed doors by a federal judge, with only sketchy summaries given to
> defense attorneys.
>
> The court said the men and their lawyers should have a right to
> respond to the evidence used against them by intelligence agents.
>
> Stockwell Day, the minister of public safety, noted that because the
> ruling does not take effect for a year, the certificates would remain
> in place. He said the government would address the court's ruling "in
> a timely and decisive fashion."
>
> Two of the men are out on bail and remain under house arrest. Three
> others are being held in a federal facility in Ontario.

<<<<<<<<<<<"The court said the treatment of the suspects was a
violation of their
rights.


"The overarching principle of fundamental justice that applies here
is
this: Before the state can detain people for significant periods of
time, it must accord them a fair judicial process," Chief Justice
Beverley McLachlin wrote in a ruling for all nine justices.


"The secrecy required by the scheme denies the person named in a
certificate the opportunity to know the case put against him or her,
and hence to challenge the government's case," she said.
">>>>>>>>>>>>>>>>

THAT IS CALLED PROTECTING CIVIL RIGHTS.  IN THE UNITED STATES OF
AMERICA, WHERE CIVIL RIGHTS ARE PROTECTED BY LAW, FOREIGN SUSPECTS ARE
NOT PROTECTED BY THE GENEVA CONVENTION.  DR. EVIL, V.P. CHENEY, AND
MINI-ME, PRESIDENT BUSH, OPTED TO MODIFY THE GENEVA CONVENTION TO DENY
FOREIGN SUSPECTS DUE PROCESS DEMANDED BY THE CONVENTION.  THIS MEANS
ENEMIES OF THE UNITED STATES OF AMERICA WILL BE DOING JUST THAT TOO.
WHAT IS GOOD FOR THE GOOSE IS GOOD FOR GANDER.











From aisaac at american.edu  Thu Mar  1 16:59:30 2007
From: aisaac at american.edu (Alan Isaac)
Date: Thu, 01 Mar 2007 21:59:30 GMT
Subject: design question: no new attributes
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05><mailman.4475.1172614860.32031.python-list@python.org><3c5Fh.3664$Tg7.2156@trnddc03>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08>
	<45e60fdc$0$30655$426a34cc@news.free.fr>
	<xgBFh.4185$854.1692@trnddc04>
	<45e7438f$0$29410$426a74cc@news.free.fr>
Message-ID: <61IFh.7997$KE2.5053@trnddc06>

The security application seems to call for roles.
I'll have to think about the schema example.
But in any case, my question was poorly stated.
I started out wanting to trap was the dynamic
addition of attributes to class instances after
initialization. While you responded to my later question
as asked, the response does not I think take this context
into account.

"Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> wrote in
message news:45e7438f$0$29410$426a74cc at news.free.fr...
> As a side note :  in Python, *all* attributes are "dynamically created".
> ... Writing methods
> within the class statement body makes things clearer, but is by no mean
> mandatory:

Point taken.  And I understand it means that my talk of
"after initialization" above contains some ambiguity.

One last point. While I remain interested in examples of how
"late" addition of attributes to class instances is useful,
I must note that everyone who responded agreed that it
has been a source of bugs.  This seems to argue against a
general ban on "locking" objects in some way, in some
circumstances.

Thanks!
Alan




From ebgssth at gmail.com  Sat Mar  3 07:56:04 2007
From: ebgssth at gmail.com (js )
Date: Sat, 3 Mar 2007 21:56:04 +0900
Subject: print a ... z, A ... Z, "\n"' in Python
In-Reply-To: <87k5xybjoo.fsf@asfast.com>
References: <mailman.4623.1172909667.32031.python-list@python.org>
	<1172913109.184004.132680@30g2000cwc.googlegroups.com>
	<a23effaf0703030142t42d5bb51jc0fe761e51294f25@mail.gmail.com>
	<a23effaf0703030145p7943faabv7560cdfb0fb7cb24@mail.gmail.com>
	<87k5xybjoo.fsf@asfast.com>
Message-ID: <a23effaf0703030456g182e9bf9i1670c2ed5f9d36@mail.gmail.com>

> > Maybe we don't want char range If string constants would be rich
> > enough.
>
> But as soon as we want a string that doesn't correspond to any
> pre-defined constants, we're hosed.  For example, there isn't
> a constant that would correspond to this Perl-ism:
>
>   print l ... w, e ... j, L ... W, E ... J, "\n";

Yes, I'm certain that l ... w, e ..j will never be a constant
because that doesn't mean a thing so nobody want them :)


From codecraig at gmail.com  Thu Mar  1 15:14:54 2007
From: codecraig at gmail.com (abcd)
Date: 1 Mar 2007 12:14:54 -0800
Subject: Capture key strokes
Message-ID: <1172780094.704492.182380@h3g2000cwc.googlegroups.com>

Is there a way to capture key strokes on a system using python (other
than pyHook)?  can wxPython capture keystrokes for the system (not
just, say a text box)?

thanks



From steve at REMOVEME.cybersource.com.au  Tue Mar 13 03:16:15 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 13 Mar 2007 18:16:15 +1100
Subject: Eureka moments in Python
Message-ID: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>

I'd be interested in hearing people's stories of Eureka moments in Python,
moments where you suddenly realise that some task which seemed like it
would be hard work was easy with Python.

I had a recent one, where I had spent some time creating a function which
took a list as an argument, and then rearranged the items according to
what magicians call a Monge shuffle. I had started off with a piece of
code that walked the list, dropping items into two new lists, then
combining them again. I got the code down to eight lines or so, something
like this:

# from memory, untested
top, bottom = True, False # not strictly needed, but helps document code
where = bottom
holder = {top: [], bottom: []}
for item in reversed(alist):
    holder[where].append(item)
    where = not where
holder[bottom].reverse()
print holder[bottom] + holder[top]


And then it suddenly struck me that I could do it as a one-liner:

alist[1::2] + list(reversed(alist[0::2]))

Or if I wanted to be even more concise, if slightly less readable:

alist[1::2] + alist[0::2][::-1]

If only a real Monge shuffle with actual cards was so easy...




-- 
Steven D'Aprano 



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 16:57:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 18:57:42 -0300
Subject: bisect on a list of lists
References: <1173471342.957772@iceman.esoterica.pt>
Message-ID: <op.toxzagv3x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 09 Mar 2007 17:15:44 -0300, Paulo da Silva  
<psdasilvaX at esotericaX.ptX> escribi?:

> What is the best way to have something like the bisect_left
> method on a list of lists being the comparision based on an
> specified arbitrary i_th element of each list element?
>
> Is there, for lists, something equivalent to the __cmp__ function for
> classes?

lists *are* classes (at least since Python 2.2)
Inherit from the builtin list, redefine __cmp__(self, other) as  
cmp(self[i_th], other[i_th])
and then redefine all the rich comparison methods (__eq__, __lt__, etc)  
using __cmp__, e.g. __le__(self, other) as __cmp__(self, other)<=0 etc.
See http://docs.python.org/ref/customization.html

-- 
Gabriel Genellina



From nobody at invalid.com  Wed Mar 28 19:19:30 2007
From: nobody at invalid.com (Erik Johnson)
Date: Wed, 28 Mar 2007 17:19:30 -0600
Subject: SimpleXMLRPCServer and Threading
References: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <460af7ef$1@nntp.zianet.com>


"Achim Domma" <domma at procoders.net> wrote in message
news:460acd70$0$20282$9b4e6d93 at newsspool3.arcor-online.net...
> Hi,
>
> is SimpleXMLRPCServer multithreaded or how does it handle multiple
> clients? I want to implement a simple server which will be queried by
> multiple processes for work to be done. The server will simply hold a
> queue with files to process. The clients will ask for the next file.
>
> Do I have to sync access to the queue or is the server not threaded at
all?


    I don't claim to know much about the internals of the module, but it
imports BaseHTTPServer which I am sure is multithreaded.  I did not test
this with functions, but when you register an object in the server,
different clients are accessing the same object:
(The following example is modified from that given in the module
documentation: http://docs.python.org/lib/module-SimpleXMLRPCServer.html)


$ cat server.py
#!/usr/bin/env python

from SimpleXMLRPCServer import SimpleXMLRPCServer

# Create server
server = SimpleXMLRPCServer(("localhost", 8000))
server.register_introspection_functions()

# Register pow() function; this will use the value of
# pow.__name__ as the name, which is just 'pow'.
server.register_function(pow)

# Register a function under a different name
def adder_function(x,y):
    return x + y
server.register_function(adder_function, 'add')


# Register an instance; all the methods of the instance are
# published as XML-RPC methods (in this case, just 'div').
class MyObj:
    SEQ = None

    def __init__(self):
        self.SEQ = range(10000)
        self.index = 0

    def next_seq(self):
        n = self.SEQ[self.index]
        self.index += 1
        return n

server.register_instance(MyObj())

# Run the server's main loop
server.serve_forever()


# First client calls:
>>> import xmlrpclib
>>> url = 'http://localhost:8000'
>>> s = xmlrpclib.Server(url)
>>> s.next_seq()
0
>>> s.next_seq()
1
>>> s.next_seq()
2


# second client calls
>>> import xmlrpclib
>>> url = 'http://localhost:8000'
>>> s = xmlrpclib.Server(url)
>>> s.next_seq()
3


    I did not programmatically drive these calls at the same time to try to
force simultaneous access from separate requests, but my intuition is that
it's a pretty good bet that SimpleXMLRPCServer has taken care of re-entrant
issues.  It may be instructive for you to run that test yourself and
explicitly verify requests do not interact.

    Alternatively, if you really want to know for sure... Python is an
open-source project. You can dig around in SimpleXMLRPCServer.py yourself
and figure out exactly what it is doing:

>>> import SimpleXMLRPCServer
>>> SimpleXMLRPCServer
<module 'SimpleXMLRPCServer' from
'/usr/lib/python2.4/SimpleXMLRPCServer.pyc'>
>>>

ej at myBox ~
$ vi /usr/lib/python2.4/SimpleXMLRPCServer.py



see also:
http://docs.python.org/lib/module-BaseHTTPServer.html
http://docs.python.org/lib/module-SocketServer.html






From paul at boddie.org.uk  Sat Mar 31 21:04:17 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 31 Mar 2007 18:04:17 -0700
Subject: Unicode list
In-Reply-To: <pan.2007.04.01.00.36.27@no.spam.plz>
References: <pan.2007.04.01.00.36.27@no.spam.plz>
Message-ID: <1175389457.886346.228800@o5g2000hsb.googlegroups.com>

Rehceb Rotkiv wrote:
> Hello,
>
> I have this little grep-like program:
>
> ++++++++++snip++++++++++
> #!/usr/bin/python
>
> import sys
> import re
>
> pattern = sys.argv[1]
> inputfile = file(sys.argv[2], 'r')
>
> for line in inputfile:
>     matches = re.findall(pattern, line)
>     if matches:
>         print matches
> ++++++++++snip++++++++++
>
> Like this, the program prints some characters as strange escape
> sequences, which is due to the input file being encoded in utf-8:

So the UTF-8 data gets printed to your terminal which isn't configured
for UTF-8, right?

> When I convert "re.findall..." to a string and wrap an "unicode()" around it,
> the matches get printed correctly.

How do you meaningfully convert it to a string? The matches variable
refers to a list, but you surely don't want to be dealing with the
list's string representation.

> Is it possible to make "matches" unicode without saving it as a single string first?

Why not convert your input into Unicode and then, for the benefit of
certain kinds of character classes, use re.findall in Unicode mode (by
specifying re.U as a flag)? Then, each match will be produced as a
Unicode object.

> The function "unicode()" seems only to work for strings. Or is there a general way of telling
> Python to abandon the ancient and evil land of iso-8859 for good and use utf-8 only?

The only refuge from ancient and evil lands is found by climbing the
mountain of Unicode: convert from encoded text as soon as you can,
work only with Unicode objects, produce encoded text only when
necessary.

Paul



From consmash at gmail.com  Wed Mar  7 15:38:58 2007
From: consmash at gmail.com (consmash at gmail.com)
Date: 7 Mar 2007 12:38:58 -0800
Subject: finding monitor or screen resolution in Linux with standard
	python module
In-Reply-To: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>
References: <1173263138.611554.42140@n33g2000cwc.googlegroups.com>
Message-ID: <1173299937.933693.77370@c51g2000cwc.googlegroups.com>

On Mar 7, 11:25 am, "akbar" <akbarh... at gmail.com> wrote:
> I googled and searched in archive. All I can find is finding
> resolution with Tkinter and pygame. Any idea to find monitor
> resolution with standard python module?
> I can check from output of: xprop -root
> _NET_DESKTOP_GEOMETRY(CARDINAL) . The problem is when you use Beryl or
> Xgl, it is not correct anymore because Beryl or Xgl set this value
> from amount of workspaces multiplied by monitor or screen resolution.

A method 'screen' from Python X Library looks promising:
http://python-xlib.sourceforge.net/doc/html/python-xlib_16.html#SEC15

More, or less if I understand right you just need to request from
server dimensions of the screen, over x protocol of course. So it will
be something associated with Xlib.



From gagsl-py2 at yahoo.com.ar  Mon Mar 26 11:40:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: 26 Mar 2007 08:40:56 -0700
Subject: calling class instances and their methods
In-Reply-To: <1174921229.208577.8290@e65g2000hsc.googlegroups.com>
References: <1174921229.208577.8290@e65g2000hsc.googlegroups.com>
Message-ID: <1174923656.307434.112840@e65g2000hsc.googlegroups.com>

On Mar 26, 12:00 pm, "spohle" <spo... at gmail.com> wrote:

> i created an instance of a my own class which has methods and all. now
> i get an outside function called, which is unfortunatly not aware of
> the instace at all (i don't control how this outside function is
> called). but i would like to get access back to my instance and it's
> methods.

I don't understand well. Do you want to call a method on your object,
from inside that external function? Can you modify its code?

--
Gabriel Genellina



From jm.suresh at gmail.com  Fri Mar  9 00:40:29 2007
From: jm.suresh at gmail.com (jm.suresh@no.spam.gmail.com)
Date: 8 Mar 2007 21:40:29 -0800
Subject: heapq.heappush and pop to use key
In-Reply-To: <pan.2007.03.08.16.02.54.895923@gmx.net>
References: <1173364305.281085.271320@t69g2000cwt.googlegroups.com>
	<pan.2007.03.08.16.02.54.895923@gmx.net>
Message-ID: <1173418829.535535.291580@j27g2000cwj.googlegroups.com>

On Mar 8, 9:02 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <1173364305.281085.271... at t69g2000cwt.googlegroups.com>,
>
> jm.sur... at no.spam.gmail.com wrote:
> > I wanted to have a heap of custom objects, and in different heaps I
> > wanted to have the weights for my elements differently. So, I modified
> > the heapq module to accept key arguments also.
>
> I would have just used tuples of the form (weight, obj) with the original
> `heapq` module.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Thanks. I will go with tuples itself.
-
Suresh



From claird at lairds.us  Mon Mar 26 11:23:44 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 Mar 2007 15:23:44 +0000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<1hvknm0.ph0nmh4ucf31N%aleax@mac.com>
Message-ID: <055ld4-qrv.ln1@lairds.us>

In article <1hvknm0.ph0nmh4ucf31N%aleax at mac.com>,
Alex Martelli <aleax at mac.com> wrote:
>Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:
>   ...
>> > So I'ld suggest to start with downloading the Enthought edition of Python,
>> > and you can judge for yourself within 10 minutes,
>> > if it's fast enough.
>> >
>> > cheers,
>> > Stef Mientki
>> 
>> Is there a mac version??
>
><http://download.enthought.com/MacEnthon/ReadMe.html> but it's self
>labeled as "0.1 Test Release" i.e. somewhat preliminary; it claims to
>support only Panther (10.3) and its 2.3.0 Python (no claims for Tiger,
>10.4, and its 2.3.5 Python, nor for other Python Mac istalls yet).
>
>If you're just trying to learn and check things out, it might be better
>to get a more recent Python from python.org (2.5 or 2.4.4) and the
>various other packages as and when you need them (you can use the
>MacEnthon list as a guide:-).  You'll need a C compiler to be sure you
>can install any package from sources -- Apple's XCode includes gcc, it's
>free, and it's the safest choice (but it's a HUGE download, as it comes
>with a lot of stuff -- I don't think Apple offers a simple way to
>install "just" gcc and minimal supporting tools).
>
>
>Alex

Yes and no.  Alex, while useful scientific computing under Mac OS X
will almost certainly eventually involve installation of XCode and
so on, Nomad.C can start to learn Python without a need to install
ANYTHING.  As you know, Python is already there, and the version that
comes with 10.4 (2.3.5, as nearly as I can easily tell) is easily 
adequate to take him through the Tutorial (with minor exceptions).

Also, while I, like you, am aware of no minimal-gcc package from
Apple, I think third parties make it available.  However, I'm not
motivated enough at this point to track down the details.  I think
Nomad.C should start with what he has under 10.4, and plan to move
on later to all of XCode.


From steven.bethard at gmail.com  Sun Mar 25 13:05:23 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 25 Mar 2007 11:05:23 -0600
Subject: [ANN] argparse 0.7 - Command-line parsing library
Message-ID: <d11dcfba0703251005r22cda03bmb7d7b6f85b3ebd10@mail.gmail.com>

Announcing argparse 0.7
-----------------------

The argparse module is an optparse-inspired command line parser that
improves on optparse by supporting:

* positional arguments
* sub-commands
* required options
* options with a variable number of args
* better usage messages
* a much simpler extension mechanism

and a number of other improvements on the optparse API.

Download argparse
=================

argparse home:
 http://argparse.python-hosting.com/

argparse single module download:
 http://argparse.python-hosting.com/file/trunk/argparse.py?format=raw

argparse bundled downloads at PyPI:
 http://www.python.org/pypi/argparse/

About this release
==================

This release adds support for single-dash long options and combining
single-dash options in a single option string.

Note that the 'outfile' type is still deprecated and will likely be
removed in the next release. Please update your code to use the new
FileType factory.

New in this release
===================

* Single-dash long options (e.g. ``-foo`` or ``-foo-bar``)

* Combining single-dash options (e.g. ``-xy`` is now the same as
  ``-x -y`` when ``-x`` does not take an argument)

Example argparse code
=====================

Here's a simple program that sums its command-line arguments and
writes them to a file::

  parser = argparse.ArgumentParser()
  parser.add_argument('integers', nargs='+', type=int)
  parser.add_argument('--log', default=sys.stdout,
                      type=argparse.FileType('w'))
  args = parser.parse_args()
  args.log.write('%s\n' % sum(args.integers))
  args.log.close()


From Marko.Cain.23 at gmail.com  Thu Mar 29 16:42:41 2007
From: Marko.Cain.23 at gmail.com (Marko.Cain.23 at gmail.com)
Date: 29 Mar 2007 13:42:41 -0700
Subject: Question about using cookielib in python 2.4
Message-ID: <1175200961.268046.194410@l77g2000hsb.googlegroups.com>

Hi,
I am following the example of Python cookbook (14.7) about using
cookielib in python2.4

 cj = cookielib.LWPCookieJar()
//.... code to send out the request
    print "Coookie-------------------------"
            if cj is not None:
                for index, cookie in enumerate(cj):
                    print index, ': ' , cookie
                cj.save(COOKIEFILE)

My question is I see cookie being printed in the above code,
but when I do a 'more ' of the Cookie file, it is empty?

This is what I see on the screen:

Coookie-------------------------
0 :  <Cookie Test-ID=swmfp2caw065kswg for .vision5.abc.com/>

but when I more the 'cookie file', it is empty?

$ more cookies.lwp
#LWP-Cookies-2.0
$



From gdonald at gmail.com  Thu Mar 29 18:01:14 2007
From: gdonald at gmail.com (Greg Donald)
Date: Thu, 29 Mar 2007 17:01:14 -0500
Subject: smtplib startls() + quit()
Message-ID: <15e66e4e0703291501r400c2bbnb8e9408ba80f04e@mail.gmail.com>

When using starttls(), calling quit() throws an exception:

-> server.quit()
(Pdb) n
send: 'quit\r\n'
sslerror: (8, 'EOF occurred in violation of protocol')

For the moment I and catching it like so:

            try:
                # this throws an exception when using tls
                server.quit()
            except:
                pass

Is there some other way to tear down the connection besides calling quit() ?


Thanks,


-- 
Greg Donald
http://destiney.com/


From mail at timgolden.me.uk  Thu Mar  1 06:48:41 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 01 Mar 2007 11:48:41 +0000
Subject: How to check for remaining hard drive space in Windows?
In-Reply-To: <1172694391.256770.234450@j27g2000cwj.googlegroups.com>
References: <1172694391.256770.234450@j27g2000cwj.googlegroups.com>
Message-ID: <45E6BD99.9080703@timgolden.me.uk>

kevinliu23 at gmail.com wrote:
> HI,
> 
> I am new to Python and wanted to know how to check for the remaining
> disk space on my Windows machine using Python? I was thinking of using
> the command line "dir" and trying to extract the output from there.
> But I'm not sure how to extract command line strings using Python
> either.

And, just for the record, there's even a few other
techniques outlined here:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66455

TJG



From wojciech_mula at poczta.null.onet.pl.invalid  Sun Mar 25 20:40:49 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (=?ISO-8859-2?Q?Wojciech_Mu=B3a?=)
Date: Mon, 26 Mar 2007 02:40:49 +0200
Subject: XML minidom Parsing and ToPrettyXML
In-Reply-To: <mailman.5606.1174867076.32031.python-list@python.org>
References: <mailman.5606.1174867076.32031.python-list@python.org>
Message-ID: <eu74rt$pg0$1@atlantis.news.tpi.pl>

Paul Kozik wrote:
> However, if I use xml.minidom.parse to parse the xml document, change
> a few attributes with setAttribute, then write back with toprettyxml,
> my XML file gets loaded up with spaces between many of the elements.

Use 'toxml' method, that writes XML document without any modification.

w.


From duncan.booth at invalid.invalid  Mon Mar  5 04:02:44 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Mar 2007 09:02:44 GMT
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
Message-ID: <Xns98EA5C051525Cduncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:

> 
>>>> from httplib import HTTPConnection
>>>> from xml.dom.ext.reader.Sax import FromXmlStream
>>>> conn = HTTPConnection('xml.showmyip.com')
>>>> conn.request('GET', '/')
>>>> doc = FromXmlStream(conn.getresponse())
>>>> print doc.getElementsByTagName('ip')[0].firstChild.data
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.4/UserList.py", line 28, in __getitem__
>     def __getitem__(self, i): return self.data[i]
> IndexError: list index out of range
>>>> conn.close()
> 
> I don't know how to fix it so that it works.
> 
> Can anyone help me fix that code snippet, or suggest another (better) 
way
> to get the externally visible IP address?

Try running it interactively and looking at the data you receive:

>>> conn = HTTPConnection('xml.showmyip.com')
>>> conn.request('GET', '/')

>>> resp = conn.getresponse()
>>> print resp
<httplib.HTTPResponse instance at 0x00C58350>
>>> data = resp.read()
>>> print data
<html><head><title>Object moved</title></head><body>

<h2>Object moved to <a href="http://www.showmyip.com/xml/">here</a>.
</h2>

</body></html>


If you try connecting to 'www.showmyip.com' and requesting '/xml/' it 
should work.


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 18:11:23 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 00:11:23 +0100
Subject: Project organization and import
In-Reply-To: <1173119492.198000.252500@v33g2000cwv.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
Message-ID: <45ec9ba3$0$2333$426a34cc@news.free.fr>

Martin Unsal a ?crit :
> On Mar 5, 9:15 am, "Chris Mellon" <arka... at gmail.com> wrote:
(snip)
> There are myriad other benefits of breaking up large files into
> functional units. Integration history, refactoring, reuse, as I
> mentioned. Better clarity of design. Easier communication and
> coordination within a team. What's the down side? What's the advantage
> of big files with many functional units?

What is a "big file" ?

(snip)
> However when I talk about what I think is "wrong" with the Pythonic
> way, obviously that's just my opinion formed by my own experience.

Your own experience *with Python* ? or any close-enough language ? Or 
your experience with C++ ?

(snip)
> Python still takes time to load & "precompile".

compile. To byte-code, FWIW. Not "load & precompile". And - apart from 
the top-level script - only modified modules get recompiled.

> That time is becoming
> significant for me even in a modest sized project;

On what hardware are you working ??? I have my interpreter up and 
running in a couple milliseconds, and my box is a poor athlon xp1200/256.

> I imagine it would
> be pretty awful in a multimillion line project.

I still wait to see a multimillion line project in Python !-)

If you find yourself in this situation, then you there's certainly 
something totally wrong in the way you (and/or your team) design and code.

But anyway - remember that only the modified modules get recompiled.

> No matter how fast it is, I'd rather reload one module than exit my
> interpreter and reload the entire world.

Did you actually *tried* it ?

> This is not a problem for Python as scripting language. This is a real
> problem for Python as world class application development language.

Sorry to have to say so, but this is total bullshit IMHO - which is 
based on working experience.

>>Nobody I know uses reload() for anything more than trivial "as
>>you work" testing in the interpreter. It's not reliable or recommended
>>for anything other than that.
> 
> 
> That too... although I think that's unfortunate. If reload() were
> reliable, would you use it?

I wouldn't. It easier to rerun a simple test script and keep the 
interpreter opened with full state - and you're sure you have the 
correct desired state then.

>>This is
>>still a much faster way than compiling any but the most trivial of
>>C/C++ modules.
>  
> I'm with you there! I love Python and I'd never go back to C/C++. That
> doesn't change my opinion that Python's import mechanism is an
> impediment to developing large projects in the language.

What about basing your opinion on facts ? What about going with the 
language instead of fighting against it ?

> 
>>If you don't like working with explicit namespaces, you've probably
>>chosen the wrong language.
> 
> 
> I never said that. I like foo.Bar(), I just don't like typing
> foo.Foo() and bar.Bar(), which is a waste of space;  syntax without
> semantics.

May I say that the problem here comes from your insistance on putting 
each class in a single module ?

> 
>>I propose that the technique most amenable to source code management
>>is for a single file (or RCS level module, if you have a locking RCS)
>>to have everything that it makes sense to edit or change for a
>>specific feature.
> 
> 
> Oh, I agree completely. I think we're using the exact same criterion.

I really doubt you do. What Chris is talking about is grouping together 
what usually needs to change together.

> A class is a self-contained feature with a well defined interface,

So is a function. Should we put any single function in a separate module 
then ?

> just what you'd want to put in it's own file. (Obviously there are
> trivial classes which don't implement features, and they don't need
> their own files.)
> 
> 
>>You're also placing far too much emphasis on reload. Focus yourself on
>>unit tests and environment scripts instead. These are more reliable
>>and easier to validate than reload() in a shell.
> 
> 
> I think this is the crux of my frustration. I think reload() is
> unreliable and hard to validate because Python's package management is
> broken.

I think the "crux of your frustation" comes from your a priori. Fighting 
against a language can only bring you into frustration. If the language 
don't fit your brain - which is perfectly legitimate - then use another 
one - but don't blame the language for it.


From psdasilvaX at esotericaX.ptX  Sat Mar 24 09:16:09 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 24 Mar 2007 13:16:09 +0000
Subject: Join strings - very simple Q.
In-Reply-To: <1174737587.638835.137070@y80g2000hsf.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
Message-ID: <1174746808.705538@jubilee.claranet.pt>

Dustan escreveu:
> On Mar 23, 1:30 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>> Mike Kent escreveu:
>> ...
>>
>>> New way:
>>> l=['a','b','c']
>>> jl=','.join(l)
>> I thank you all.
>>
>> Almost there ...
>> I tried "".join(l,',') but no success ... :-(
>>
>> Paulo
> 
> Perhaps you're doing it wrong, despite having an example right in
> front of you?

Some misunderstanding here ...
The post was just to thank. I was refering to what I tried
before posting the question here.

Regards
Paulo


From __peter__ at web.de  Fri Mar 23 07:30:53 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 23 Mar 2007 12:30:53 +0100
Subject: "finally" for unit test
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
Message-ID: <eu0dl8$6j9$01$1@news.t-online.com>

killkolor wrote:

> I have a unittest framework that tests a single function that in turn
> works with files (takes input and outputs in the same file, no return
> values).
> In the unittest class I assign a member with all the names of my
> testfiles and a testdirectory. The tests call the function (which
> opens and writes to the file) and then opens the file to see if
> everything is in order. The problem now is that after each testrun I
> have to copy "fresh" files into the testdirectory, since of course the
> function already run on all the files and made the changes. So I
> implemented a buffering in the unittest functions: buffer the file,
> call the function, make the test, write the buffered file back. This
> works fine for unittests that do not fail. If a unittest fails though
> the function stops and the writing back is never done. Is there
> something like a finally for unittest functions? 

TestCase.tearDown()

http://docs.python.org/lib/testcase-objects.html#l2h-5002

> Or could I use 
> another approach to buffer and write back my files (for each unittest
> function)?

Rather than restoring the file I would just delete it and use

TestCase.setUp() to make a fresh copy.

Peter


From steven.bethard at gmail.com  Sat Mar 31 22:08:45 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 31 Mar 2007 20:08:45 -0600
Subject: I18n issue with optik
In-Reply-To: <MPG.2078ea9b701c87899896a1@news.individual.de>
References: <MPG.2078ea9b701c87899896a1@news.individual.de>
Message-ID: <T7qdnbljCfKziZLbnZ2dnUVZ_vOlnZ2d@comcast.com>

Thorsten Kampe wrote:
> I've written a script which uses Optik/Optparse to display the 
> options (which works fine). The text for the help message is localised 
> (with german umlauts) and when I execute the script with the localised 
> environment variable set, I get this traceback[1]. The interesting 
> thing is that the localised optparse messages from displays fine - 
> it's only my localisation that errors.
> 
> From my understanding, my script doesn't put out anything, it's 
> optik/optparse who does that. My po file is directly copied from the 
> optik po file (who displays fine) and modified so the po file should 
> be fine, too.
> 
> What can I do to troubleshoot whether the culprit is my script, optik 
> or gettext?
> 
> Would it make sense to post the script and the mo or po files?

Yes, probably.  Though if you can reduce it to the simplest test case 
that produces the error, it'll increase your chances of having someone 
look at it.

You could also try posting to the optik list:
     http://lists.sourceforge.net/lists/listinfo/optik-users

STeVe


From jaywgraves at gmail.com  Tue Mar  6 15:00:10 2007
From: jaywgraves at gmail.com (jay graves)
Date: 6 Mar 2007 12:00:10 -0800
Subject: using python to query active directory
In-Reply-To: <1234705.TuyeK9pzyv@teancum>
References: <1234705.TuyeK9pzyv@teancum>
Message-ID: <1173211209.757857.143780@v33g2000cwv.googlegroups.com>

On Mar 6, 1:34 pm, David Bear <david.b... at asu.edu> wrote:
> Is it possible to use python to make calls agains microsoft active
> directory? I suppose this should be qualified by what is needed to do it
> from windows (I assume the win32all package) and from linux (if possible).
> Any code samples would be great.

Tim Golden is your man.

http://tgolden.sc.sabren.com/python/active_directory.html

HTH
...
Jay Graves



From greg at cosc.canterbury.ac.nz  Sat Mar 10 04:33:36 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sat, 10 Mar 2007 22:33:36 +1300
Subject: floating point rounding
In-Reply-To: <1173477489.186292.167530@c51g2000cwc.googlegroups.com>
References: <DOiIh.135$TK5.124@newsfe13.lga><uHjIh.21006$oJ1.746@newsfe18.lga>
	<1173477489.186292.167530@c51g2000cwc.googlegroups.com>
Message-ID: <55fcfvF258g2hU1@mid.individual.net>

John Henry wrote:

> Or more precisely:
> 
> round(0.014999999999999999,2)

No, that *won't* solve the problem. Using a slightly
different example,

 >>> x = 1.5 * 0.1
 >>> x
0.15000000000000002
 >>> round(x, 2)
0.14999999999999999

The problem is that floats are stored internally in
binary, not decimal, and numbers like 0.1 and 0.01
have no exact representation as a binary float.
Using round() doesn't help, because the result is
still a binary float, and the result you're after
still can't be represented.

The best you can do is to *display* it rounded
to the number of digits you want using formatting,
e.g.

 >>> "%.2f" % x
'0.15'

Alternatively, use the Decimal module, which stores
numbers as decimal and does arithmetic in ways that
will match your calculator. It's slower, though.

--
Greg


From mail at microcorp.co.za  Wed Mar  7 00:50:59 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 7 Mar 2007 07:50:59 +0200
Subject: Wrong exist status for os.system, os.poepen, etc.
References: <83e8215e0703060739j3cd924c4o8dc19423e8f49055@mail.gmail.com>
Message-ID: <020401c76083$b4072d60$03000080@hendrik>

"Paolo Pantaleo" <paolopantaleo at gmail.com> wrote:
> $./x
> $echo $?
> 20
> 
> $ python
> 
> give the following commands:
> 
> >>> import os
> >>> os.system("/tmp/x")
> 5120
> 

256 times 20 is 5120
this is a big/little endian little bug

- Hendrik




From http  Thu Mar  8 00:41:14 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 21:41:14 -0800
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
Message-ID: <7xhcsws35x.fsf@ruckus.brouhaha.com>

Brian Adkins <lojicdotcomNOSPAM at gmail.com> writes:
> With prices of dedicated servers and virtual private servers so cheap,
> why would anyone get a hosting account without root access? 

Because it turns you into a sysadmin instead of letting specialists
handle all the OS stuff so you can concentrate on your application.

Also, no VPS where you have to run your own httpd instance (and
usually your own database if you're using one) can possibly be as
cheap as a virtual host where you're sharing the same httpd with
thousands of other sites.


From kyosohma at gmail.com  Tue Mar 20 15:25:41 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 12:25:41 -0700
Subject: Imports
In-Reply-To: <1174417150.930765.141160@l77g2000hsb.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>
	<1174417150.930765.141160@l77g2000hsb.googlegroups.com>
Message-ID: <1174418741.771343.165360@n76g2000hsh.googlegroups.com>

On Mar 20, 1:59 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
> On Mar 20, 1:51 pm, kyoso... at gmail.com wrote:
>
>
>
> > On Mar 20, 1:31 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
>
> > > I am working with a tool called maxQ that generates jython scripts.
> > > The tool runs in
>
> > > C:\maxq\bin.
>
> > > Rather than clutter up bin I want to put the scripts and other .py
> > > scripts in
>
> > > c:\maxq\bin\testScripts.
>
> > > When doing so the scripts need to import from
>
> > > c:\maxq\jython, but can't find the modules.
>
> > > I tried adding c:\maxq\jython to the environment variable pythonpath
> > > but to no avail. Perhaps I missed it in Rossum's tutorial but is there
> > > a std prgrammatic way to specify a module directory?
>
> > > Could you, would you, recommend a text or another webpage for learning
> > > more (much more) about python?
>
> > > Thanx,
>
> > > gtb
>
> > I typically just import sys and then do a
> > sys.path.append(directoryPath). This basically makes whatever modules
> > in that path available at run time. If you need a beginners reference
> > book, I recommend "Beginning Python" by Hetland. "Python Programming
> > for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
> > get into the internals of the language like Hetland does. Once you're
> > a snake charmer too, you can "graduate" to the "Programming Python"
> > book by Lutz.
>
> > Mike
>
> Something else going on then, does the directory path need to be the
> full path or will it search sub-directories?
>
> Traceback (most recent call last):
>   File "C:\maxq-0.98\bin\testScripts\compactLogin.py", line 2, in
> <module>
>     from CompactTest import CompactTest
>   File "c:\maxq-0.98\jython\CompactTest.py", line 2, in <module>
>     from java.lang import *
> ImportError: No module named java.lang
>
> Thanks for the book recommendations.
>
> gtb

Usually, the sys.path.append will allow Python to search the
subfolders too, but I have noticed that sometimes it doesn't if you
use UNC paths. I don't use jython, so maybe there's another way to fix
this that is more specific to that implementation of Python?

Mike



From duncan.booth at invalid.invalid  Sat Mar 10 13:12:03 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Mar 2007 18:12:03 GMT
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4813.1173388535.32031.python-list@python.org>
	<G1mIh.25$qe5.19@trnddc05>
	<mailman.4877.1173484222.32031.python-list@python.org>
Message-ID: <Xns98EFB92ED8D9duncanbooth@127.0.0.1>

skip at pobox.com wrote:

>     http://www.python.org/dev/peps/pep-0666/

In pep-0666, Laura Creighton wrote:
>    People who mix tabs and spaces, naturally, will find that their
>    programs do not run.  Alas, we haven't found a way to give them an
>    electric shock as from a cattle prod remotely.  (Though if somebody
>    finds out a way to do this, I will be pleased to add this option to
>    the PEP.)

Fortunately, since the PEP was last edited in 2001, there has been progress 
on this front with the advent of the Microsoft WE-SYP programme. (see 
http://www.youtube.com/watch?v=M-c0YSsF_O0 ). We should find out whether 
the technology can be licensed for use in a future release of Python.


From bj_666 at gmx.net  Fri Mar  9 10:32:02 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 09 Mar 2007 16:32:02 +0100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
Message-ID: <pan.2007.03.09.15.32.01.112493@gmx.net>

In <1173453432.893222.308610 at j27g2000cwj.googlegroups.com>, cesco wrote:

> Given two positive integers, N and M with N < M, I have to generate N
> positive integers such that sum(N)=M. No more constraints.

Break it into subproblems.  Generate a random number X from a suitable
range and you are left with one number, and the problem to generate (N-1)
random numbers that add up to (M-X).  You have to think a little bit about
the "suitable range" part though.

The necessary functions to draw random numbers are in the `random` module.

Ciao,
	Marc 'BlackJack' Rintsch


From ckkart at hoc.net  Wed Mar 28 08:22:03 2007
From: ckkart at hoc.net (Christian)
Date: Wed, 28 Mar 2007 21:22:03 +0900
Subject: XML Parsing
In-Reply-To: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
Message-ID: <eudml9$qfe$4@sea.gmane.org>

pyapplico at gmail.com wrote:
> I want to parse this XML file:
> 
> <?xml version="1.0" ?>
> 
> <text>
> 
> <text:one>
> <file>filename</file>
> <contents>
> Hello
> </contents>
> </text:one>
> 
> <text:two>
> <file>filename2</file>
> <contents>
> Hello2
> </contents>
> </text:two>
> 
> </text>
> 
> This XML will be in a file called filecreate.xml
> 
> As you might have guessed, I want to create files from this XML file
> contents, so how can I do this?
> What modules should I use? What options do I have? Where can I find
> tutorials? Will I be able to put
> this on the internet (on a googlepages server)?
> 
> Thanks in advance to everyone who helps me.
> And yes I have used Google but I am unsure what to use.
> 

Try this:

http://www.python.org/doc/2.4.1/lib/expat-example.html


Christian



From anton.vredegoor at gmail.com  Tue Mar 13 11:52:14 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Tue, 13 Mar 2007 16:52:14 +0100
Subject: number generator
In-Reply-To: <mailman.5020.1173798742.32031.python-list@python.org>
References: <mailman.5016.1173790665.32031.python-list@python.org>	<et6al4$2to$1@news1.zwoll1.ov.home.nl>
	<mailman.5020.1173798742.32031.python-list@python.org>
Message-ID: <et6h8n$9it$1@news5.zwoll1.ov.home.nl>

Dick Moores wrote:

> Paul Rubin's fencepost method is about 14 times faster than mine for
> the same M == 8 and N == 4!  :(

Actually they looked a bit similar after I had mucked a bit with them 
:-) But indeed it's slow.

> Sorry, I don't understand this. Could you spell it out for me by 
> rewriting my above test to use it? Thanks!

OK here you go. I'm copying a modification from something that I used to 
check something else, I hope you recognize the code after my refactoring.

from itertools import islice
import random

def sumRndInt(m,n):
      while 1:
          L = [random.randint(1,m-n+1) for i in xrange(n)]
          if sum(L) == m:
              yield tuple(L)

def fencepost(m,n):
     while 1:
         t = sorted(random.sample(xrange(1,m), n-1))
         yield tuple((j-i) for i,j in zip([0]+t, t+[m]))

def freq(g,k):
     D = {}
     for x in islice(g,k):
         D[x] = D.get(x,0)+1
     return D

def test():
     m = 7
     n = 4
     k = 20000
     R = freq(sumRndInt(m,n),k)
     F = freq(fencepost(m,n),k)
     assert sorted(R) == sorted(F)
     for x in sorted(R):
         print x,R[x],F[x]

if __name__=='__main__':
     test()


From michele.simionato at gmail.com  Tue Mar 20 01:14:00 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 19 Mar 2007 22:14:00 -0700
Subject: How to calculate a file of equations in python
In-Reply-To: <mailman.5320.1174367030.32031.python-list@python.org>
References: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>
	<mailman.5320.1174367030.32031.python-list@python.org>
Message-ID: <1174367640.825369.90490@l75g2000hse.googlegroups.com>

On Mar 20, 1:03 am, Michael Bentley <rmc... at gmail.com> wrote:
> On Mar 19, 2007, at 11:48 PM, John wrote:
>
> > Hi,
> > I have a text file which contains math expression, like this
> > 134
> > +234
> > +234
>
> > (i.e. an operation (e.g. '+) and then a number and then a new line).
>
> > Can you please tell me what is the easiest way to calculate that file?
> > for example the above example should be = 134 + 234 + 234 = 602.
>
> Easiest?
>
> eval(' '.join(open(fileName).readlines()).replace('\n',''))

Or use one of the many safe_eval recipes out there, for instance

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/364469


     Michele Simionato



From aleax at mac.com  Mon Mar 19 11:01:59 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 19 Mar 2007 08:01:59 -0700
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
Message-ID: <1hv7py1.17yyxj1pkf9peN%aleax@mac.com>

Ben <bensherman at gmail.com> wrote:

> I have recently learned how list comprehension works and am finding it
> extremely cool.  I am worried, however, that I may be stuffing it into
> places that it does not belong.
> 
> What's the most "pythony" way to do this:
> 
> even = []
> for x in range(0,width,2):
>     for y in range(0,height,2):
>         color = im.getpixel((x,y))
>         even.append(((x,y), color))
> 
> versus list comprehension:
> 
> even2 = [((x,y), im.getpixel((x,y))) for x in range(0,width,2) for y
> in range(0,height,2)]
> 
> Is there a computational difference in creating a blank list and
> appending to it versus doing a list comprehension?   Are there
> advantages to it outside of short and pretty code?
> 
> Feel free to tell me a different way to do this, as well.

I like list comprehensions when I'm building up a list, originally
empty, with .append calls within for loops (possibly with an if guard),
unless I need (e.g.) a conditional break, which LCs don't support.

IOW, I would use a LC in your example.  However, I would format it more
neatly:

even2 = [((x,y), im.getpixel((x,y))) 
               for x in range(0,width,2) 
               for y in range(0,height,2)]

though I guess that's a matter of taste.

Some people think that LCs should not be used except for extremely
simple cases, but I personally disagree with that stance.

The cases where an LC should NOT be used are those in which you are not
really building a list as above described, but e.g. "just looping".

To check whether LC is faster than, slower than, or equal to a more
extensive loop, use timeit, e.g.:

brain:~/py25/Doc alex$ python -mtimeit -s'xs=range(83)' 'L=[]' 'for x in
xs: L.append(x*x)'
10000 loops, best of 3: 34.6 usec per loop

brain:~/py25/Doc alex$ python -mtimeit -s'xs=range(83)' 'L=[x*x for x in
xs]' 
100000 loops, best of 3: 19.4 usec per loop

So for this simple case, it may look like the LC is much faster;
however:

brain:~/py25/Doc alex$ python -mtimeit -s'xs=range(83)'
'L=[];ap=L.append' 'for x in xs: ap(x*x)'
10000 loops, best of 3: 22.3 usec per loop

...as you can see, hoisting the L.append lookup out of the loop accounts
for most of the difference.


Alex


From http  Sat Mar 31 21:24:31 2007
From: http (Paul Rubin)
Date: 31 Mar 2007 18:24:31 -0700
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
	<yfsirchf04z.fsf@oc.ex.ac.uk>
	<1175387715.022063.171570@b75g2000hsg.googlegroups.com>
Message-ID: <7xircglwds.fsf@ruckus.brouhaha.com>

"Paul McGuire" <ptmcg at austin.rr.com> writes:
> Why would that be?  GPL'ed code libraries can be a turn-off for those
> who want to release commercial products using them, but a GPL'ed
> utility such as a compiler bears no relationship or encumbrance on the
> compiled object code it generates.

For some of us, doing volunteer work on non-GPL projects is a
turn-off.  I don't mind writing code that goes into proprietary
products, but I expect to get paid for it just like the vendors of the
products expect to get paid.  If I'm working for free I expect the
code to stay free.  This is why I don't contribute code to Python on
any scale.


From steve at REMOVE.THIS.cybersource.com.au  Fri Mar  9 21:45:50 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 10 Mar 2007 13:45:50 +1100
Subject: bisect on a list of lists
References: <1173471342.957772@iceman.esoterica.pt>
	<mailman.4874.1173477506.32031.python-list@python.org>
Message-ID: <pan.2007.03.10.02.45.50.662097@REMOVE.THIS.cybersource.com.au>

On Fri, 09 Mar 2007 18:57:42 -0300, Gabriel Genellina wrote:

> En Fri, 09 Mar 2007 17:15:44 -0300, Paulo da Silva  
> <psdasilvaX at esotericaX.ptX> escribi?:
> 
>> What is the best way to have something like the bisect_left
>> method on a list of lists being the comparision based on an
>> specified arbitrary i_th element of each list element?
>>
>> Is there, for lists, something equivalent to the __cmp__ function for
>> classes?
> 
> lists *are* classes (at least since Python 2.2)

Not quite. Classes and types are *almost* the same, but not exactly.

>>> type(list)
<type 'type'>
>>> class Spam:
...     pass
...
>>> type(Spam)
<type 'classobj'>

Usually the difference doesn't make a difference, but sometimes it does.

>>> Spam.x = 3
>>> list.x = 3
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: can't set attributes of built-in/extension type 'list'




-- 
Steven.



From bignose+hates-spam at benfinney.id.au  Thu Mar  1 16:17:04 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 Mar 2007 08:17:04 +1100
Subject: Tuples vs Lists: Semantic difference
References: <slrneubq5t.1j3.rshepard@salmo.appl-ecosys.com>
	<87slcqvskr.fsf@benfinney.id.au>
	<mailman.4538.1172705434.32031.python-list@python.org>
	<54ms6fF21c6h3U2@mid.individual.net>
	<mailman.4550.1172720725.32031.python-list@python.org>
	<1172727871.032664.165240@j27g2000cwj.googlegroups.com>
Message-ID: <874pp4wtnz.fsf@benfinney.id.au>

"George Sakkis" <george.sakkis at gmail.com> writes:

> On Feb 28, 10:45 pm, Ben Finney wrote:
>
> > Tuples are intended for use as heterogeneous data structures [...]
> > Lists are intended for use as homogeneous sequences [...]
>
> Nice, that's a good summary of the straw man arguments about the
> "true" distinction between tuples and lists.

I'm not sure why you say it's a "straw man argument". I'm presenting
*my* understanding of a position that I also share, in order to defend
it; a straw man argument is a misrepresentation of *another party's*
position for the purpose of appearing to attack that party's position.

    http://www.fallacyfiles.org/strawman.html

Whose position have I misrepresented and attacked?

> Now can you please explain why an "heterogeneous data structure":

> 1) does not support __setitem__, changing the value of an existing
> item from 3 to 4,

In the case of a tuple, because the "value" is conceptually the entire
tuple. To change one of its items would be to create a new value -- so
that's what is supported.

> 2) supports iteration over its ("heterogeneneous") elements, but not
> an index() method

An index() method would imply that the index of an item has some
meaning, such that extracting a single item is meaningful. Since a
tuple represents a single conceptual structural value, to extract one
item is something to be done at the same time as extracting all the
others.

> 3) why using indices rather than names for implied semantics is a
> good idea anyway.

You've already shown that one *doesn't* use an index for accessing
items in a tuple.

> As for addition/removal/insertion of elements not making sense for a
> heterogeneous data structure, have you heard of database schema
> change ?

A database schema change is not an operation one performs with the
expectation that the tuples will remain the same. Thus, one would
expect to discard the old tuples as obsolete and retrieve them from
the relation again, getting new tuples.

> Heterogeneous data structures are well known for several decades
> now; they are commonly spelled "records" though, not tuples, and
> have a more reasonable API to support their semantics.

Python doesn't natively support relational schema operations. It does
natively support tuples. I never professed that the two were the same,
and don't accept that they should be.

-- 
 \      "I have never made but one prayer to God, a very short one: 'O |
  `\       Lord, make my enemies ridiculous!' And God granted it."  -- |
_o__)                                                         Voltaire |
Ben Finney



From gagsl-py2 at yahoo.com.ar  Thu Mar 29 12:50:45 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 29 Mar 2007 13:50:45 -0300
Subject: dynamic module does not define init function (initpsycopgmodule)
References: <1175113003.241496.44350@n76g2000hsh.googlegroups.com>
Message-ID: <op.tpymevw1x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 28 Mar 2007 17:16:43 -0300, kickslop <kickslop at yahoo.com> escribi?:

> Clearly I am doing something braindead here with psycopg 1.1.21
> (psycopg2 is not an option).
>
> Any ideas?  I get the same results when I build it with Red Hat's GCC
> 3.4.6 setup as well as our in-house GCC 3.3.5 setup.
>
> Linux rcf-temp3 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:32:02 EDT 2006
> x86_64 x86_64 x86_64 GNU/Linux
>
> Python 2.3.4 (#1, Sep 26 2006, 17:25:54)
> [GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import psycopgmodule
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: dynamic module does not define init function
> (initpsycopgmodule)

I've never used it, but the module appears to be called psycopg.
Try `import psycopg` instead

> psycopg-1.1.21 % nm -a psycopgmodule.so | grep init
> 0000000000004748 T _init
> 0000000000005000 T initpsycopg
...should work.

-- 
Gabriel Genellina



From graemeglass at gmail.com  Fri Mar 16 10:59:52 2007
From: graemeglass at gmail.com (Graeme Glass)
Date: 16 Mar 2007 07:59:52 -0700
Subject: war with china? a different approach?
In-Reply-To: <1169235241.943262.161690@51g2000cwl.googlegroups.com>
References: <noone-8828B8.15092815012007@newsgroups.comcast.net>
	<150120071507211273%dwbarnes@barnsco.com>
	<45AC73E8.4010504@mustang.org>
	<1hs1e5i.1l5vmdx1ih79a7N%peter@DIESPAMMERDIE.dk>
	<45acf752.33126625@news-server.houston.rr.com>
	<2-OdnVZn--tUhzDYnZ2dnUVZ_q_inZ2d@bresnan.com>
	<1hs27ig.1y5o47s3rgkltN%peter@DIESPAMMERDIE.dk>
	<5158etF1j0n5aU3@mid.individual.net>
	<45ae2bf1.112133906@news-server.houston.rr.com>
	<1hs3c73.1yxa7c3q12khkN%peter@DIESPAMMERDIE.dk>
	<jgkeegan-3F565A.20305218012007@individual.net>
	<1hs61zt.1f267j04r1ur2N%peter@DIESPAMMERDIE.dk>
	<jgkeegan-59B29A.21505218012007@individual.net>
	<51av2lF1j1dp8U1@mid.individual.net>
	<jgkeegan-C9ACA6.05090819012007@individual.net>
	<Xns98BD610993FA4Sandman@216.196.97.136>
	<jgkeegan-1CFDBB.11465019012007@individual.net>
	<45b101c8.82683109@news-server.houston.rr.com>
	<1169235241.943262.161690@51g2000cwl.googlegroups.com>
Message-ID: <1174057192.537355.3830@n59g2000hsh.googlegroups.com>

Whats this got to do with python?


On Jan 19, 9:34 pm, therm... at india.com wrote:
> Coz we have fools in the govt, the downfall of the US has only been
> accelerated !!
> The are morons who staged 9/11 controlled demolition to kill americans
> to start their idiotic war.
>
> Date: Sat, 21 Oct 2006 16:12:20 -0500
> Subject: [nsmworld] war with china? a different approach?
> From: "J. Knowles" <nsmkansasc... at hotmail.com>
>
> Greater China
>      Apr 20, 2006
>
> SPEAKING FREELY
> If it comes to a shooting war ...
> By Victor N Corpus
>
> Speaking Freely is an Asia Times Online feature that allows guest
> writers to
> have their say. Please click here if you are interested in
> contributing.
>
> One could call this article a worst-case scenario for the new American
> century. Why worst case? Because of the hard lessons from history. The
> Romans did not consider the worst-case scenario when Hannibal crossed
> the
> Alps with his elephants and routed them; or when Hannibal encircled and
>
> annihilated the numerically superior Roman army at the Battle of
> Cannae.
>
> The French did not consider the worst-case scenario at Dien Bien Phu
> and
> when they built the Maginot Line, and the French suffered disastrous
> defeats. The Americans did not consider the
>
> worst-case scenario at Pearl Harbor or on September 11, and the results
> were
> disastrous for the American people. Again, American planners did not
> consider the worst-case scenario in its latest war
> in Iraq, but instead operated on the "best-case scenario", such as
> considering the Iraq invasion a "cake walk" and that the Iraqi people
> would
> be parading in the streets, throwing flowers and welcoming American
> soldiers
> as "liberators", only to discover the opposite.
>
> Scenario One: America launches 'preventive war' vs China
> Our first objective is to prevent the re-emergence of a new rival. This
> is a
> dominant consideration underlying the new regional defense strategy and
>
> requires that we endeavor to prevent any hostile power from dominating
> a
> region whose resources would, under consolidated control, be sufficient
> to
> generate global power. These regions include Western Europe, East Asia,
> the
> territory of the former Soviet Union and Southwest Asia.
> -Paul Wolfowitz, former US deputy secretary of defense and currently
> president of the World Bank
> Consider these snapshots of China:
>
> Since 1978, China has averaged 9.4% annual GDP growth
>
> It had a five-fold increase in total output per capita from 1982 to
> 2002
>
> It had $61 billion in foreign direct investment in 2004 alone and
> foreign
> trade of $851 billion, the third-largest in the world
>
> The US trade deficit with China exceeded $200 billion in 2005
>
> China has $750 billion in foreign exchange reserves and is the
> second-biggest oil importer
>
> Last year it turned out 442,000 new engineers a year; with 48,000
> graduates
> with master's degrees and 8,000 PhDs annually; compared to only 60,000
> new
> engineers a year in the US.
>
> China for the first time (2004) surpassed America to export the most
> technology wares around the world. China enjoyed a $34 billion trade
> surplus
> with the US in advanced technology products in 2004 (The Economist,
> December
> 17, 2005). In 2005, the surplus increased to $36 billion
>
> It created 20,000 new manufacturing facilities a year
>
> It holds $252 billion in US Treasury Bonds (plus $48 billion held by
> Hong
> Kong)
>
> Among the five basic food, energy and industrial commodities -grain
> and
> meat, oil and coal and steel -consumption in China has eclipsed that
> of the
> US in all but oil.
>
> China has also gone ahead of the US in the consumption of TV sets,
> refrigerators and mobile phones
>
> In 1996, China had 7 million cell phones and the US had 44 million. Now
>
> China has more mobile phone users than the US has people.
>
> China has about $1 trillion in personal savings and a savings rate of
> close
> to 50%; U.S. has about $158 billion in personal savings and a savings
> rate
> of about 2% (The Wall Street Journal, Nov 19, 2005)
> Shanghai boasts 4,000 skyscrapers - double the number in New York
> City (The
> Wall Street Journal, Nov 19, 2005)
> Songbei, Harbin City in north China is building a city as big as New
> York
> City
>
> Goldman Sachs predicts that China will surpass the US economy by 2041.
>
> Before China's economy catches up with America, and before China builds
> a
> military machine that can challenge American superpower status and
> world
> dominance, America's top strategic planners (Project for the New
> American
> Century) decide to launch a "preventive war" against China. As a
> pretext for
> this, the US instigates Taiwan to declare independence.
>
> Taiwan declares independence!
> China has anticipated and long prepared itself for this event. After
> observing "Operation Summer Pulse -04" when US aircraft carrier
> battle
> groups converged in the waters off China's coast in mid-July through
> August
> of 2004, Chinese planners began preparing to face its own worst-case
> scenario: the possibility of confronting a total of 15 carrier battle
> groups
> composed of 12 from America and three from its close British ally.
> China's
> strategists refer to its counter-strategy to defeat 15 or more aircraft
>
> carrier battle groups as the "assassin's mace" or shashaujian.
>
> After proper coordination with Russia and Iran and activating their
> previously agreed strategic plan, troops and weapon systems are
> pre-positioned. China then launches a missile barrage on Taiwan.
> Command and
> control nodes, military bases, logistics centers, vital war industries,
>
> government centers and air defense installations are simultaneously hit
> with
> short and medium range ballistic missiles armed with conventional,
> anti-radar, thermo baric and electro-magnetic pulse warheads.
>
> At the North American Aerospace Defense (NORAD) Command and Control
> Center,
> ranking defense officials watch huge electronic monitor screens showing
>
> seven US and two British aircraft carrier battle groups converging on
> the
> East China Sea with another three US carrier battle groups entering the
>
> Persian Gulf, while the remaining two US and one British battle groups
> remain in the Indian Ocean to serve as a strategic reserve.
>
> As the aircraft carrier battle groups advance, China draws out one of
> its
> "trump cards" by leaking to the world media that it is dumping its
> holdings
> of US Treasury bonds and shifting to gold and euros.
>
> Meanwhile, strategic planners at NORAD watch with glee as they observe
> on
> the screen as monitored by their radar satellites that Chinese surface
> ships
> are making a hasty retreat as nine allied carrier battle groups advance
>
> toward the Philippine Sea and Chinese waters near Taiwan.
>
> The assassin's mace: China's anti-satellite weapons
> Glee and ecstasy soon turn to shock as monitor screens suddenly go
> blank.
> Then all communication via satellites goes dead. China has drawn its
> second
> "trump card" (the assassin's mace) by activating its maneuverable
> "parasite"
> micro-satellites that have unknowingly clung to vital (NORAD) radar and
>
> communication satellites and have either jammed, blinded or physically
> destroyed their hosts.
>
> This is complemented by space mines that maneuver near adversary
> satellites
> and explode. Secret Chinese and Russian ground-based anti-satellite
> laser
> weapons also blind or bring down US and British satellites used for
> C4ISR
> (command, control, communication, computers, intelligence, surveillance
> and
> reconnaissance). And to ensure redundancy and make sure that the
> adversary
> C4ISR system is completely "blinded" even temporarily, hundreds of
> select
> Chinese and Russian information warriors (hackers) specifically trained
> to
> attack their adversary's C4ISR systems simultaneously launch their
> cyber
> offensive.
>
> For a few precious minutes, the US and UK advancing carrier battle
> groups
> are stunned and blinded by the "mace", ie, a defensive weapon used to
> temporarily blind a stronger opponent. But the word mace has another
> meaning; one which is deadlier and used in combination with the first.
>
> A mace can be a spiked war club used in olden times to knock out an
> opponent. Applied in modern times, the spikes of the assassin's mace
> refer
> to currently unstoppable supersonic cruise missiles capable of sinking
> aircraft carriers that are in China's inventory; complemented by
> equally
> unstoppable "squall" or SHKVAL rocket torpedoes and regular 65
> cm-diameter
> wake-homing torpedoes, bottom-rising rocket-propelled mines, and
> "obsolete"
> warplanes converted into unmanned combat aerial vehicles (UCAVs) firing
>
> anti-ship missiles from standoff positions and finally dive-bombing
> into the
> heart of the US and UK aircraft carrier armada.
>
> Missile barrage on advancing carrier battle groups
> A few seconds after the "blackout", literally hundreds of short and
> medium-range ballistic missiles (DF7/9/11/15s, DF4s, DF21X/As, some of
> which
> are maneuverable) pre-positioned on the Chinese mainland, and stealthy,
>
> sea-skimming and highly-accurate cruise missiles (YJ12s, YJ22s,
> KH31A/Ps,
> YJ83s, C301s, C802s, SS-N-22s, SS-NX-26/27s, 3M54s & HN3s) delivered
> from
> platforms on land, sea and air race toward their respective designated
> targets at supersonic speed.
>
> Aircraft carriers are allotted a barrage of more than two dozen cruise
> missiles each, followed by a barrage of short and medium-range
> ballistic
> missiles timed to arrive in rapid succession.
>
> Supersonic cruise missiles constitute China's third deadly "trump card"
>
> against the US - part of the so-called assassin's mace. These
> unstoppable
> cruise missiles may be armed with 440-lb to 750-lb conventional
> warheads (or
> 200-kiloton tactical nuclear warheads 10 times stronger than Hiroshima)
>
> traveling at more than twice the speed of sound (or faster than a rifle
>
> bullet).
>
> The cruise missiles, together with the SRBMs and MRBMs (short and
> medium-range ballistic missiles) may also be armed with radio frequency
>
> weapons that can simulate the electro-magnetic pulse of nuclear
> explosions
> to fry computer chips, or fuel-air explosives that can annihilate the
> personnel in aircraft carriers and battleships without destroying the
> platforms.
>
> Their effective range varies from less than 100 to 1,800 kilometers
> from
> stand-off positions. Delivered by...
>
> read more ?




From dickinsm at gmail.com  Mon Mar 12 00:03:46 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 21:03:46 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <1hutr21.qrf8np10dpnwlN%aleax@mac.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
	<1173642367.926295.205400@64g2000cwx.googlegroups.com>
	<1hutr21.qrf8np10dpnwlN%aleax@mac.com>
Message-ID: <1173672226.771566.218750@s48g2000cws.googlegroups.com>

On Mar 11, 9:56 pm, a... at mac.com (Alex Martelli) wrote:
> That bug isn't formally closed yet, and the discussion's going on, we'll
> see.  Meanwhile can you try my patch 1678668 just to double check it
> does fix everything?  (It's agains the current HEAD of Python's svn).

It does, and all tests pass.  (Still on OS X 10.4.8/PowerPC;  I'll
test
it tomorrow on my Linux machine at work.)

Mark



From moogyd at yahoo.co.uk  Mon Mar 12 14:32:17 2007
From: moogyd at yahoo.co.uk (moogyd at yahoo.co.uk)
Date: 12 Mar 2007 11:32:17 -0700
Subject: Newbie Question : "grep"
In-Reply-To: <1173722120.347200.37610@n33g2000cwc.googlegroups.com>
References: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
	<45f5864f$1@nntp.zianet.com> <45f5877c$1@nntp.zianet.com>
	<1173722120.347200.37610@n33g2000cwc.googlegroups.com>
Message-ID: <1173724336.993257.41540@s48g2000cws.googlegroups.com>

On 12 Mar, 18:55, attn.steven.... at gmail.com wrote:
> On Mar 12, 10:01 am, "Erik Johnson" <nob... at invalid.com> wrote:
>
>
>
> > Sorry, I forgot to paste the modified version of my code in the post:. I
> > think this is the same behaviour:
>
> > for line in lines:
> >     if "placed" in line:
> >         if "i_a/i_b/ROM/" in line:
> >             pos = (line.split()[4]).split("_")[1]
> >             found = False
>
> >             for (tag, (start, end)) in tags:
> >                 if tag in line:
> >                     found = True
> >                     print "        i_a/i_b/ROM/%s [%i:%i] LOC =" %\
> >                         (pos, tag, start, end)
> >                     break
>
> >             if not found:
> >                 print "Error"
>
> Instead of using a sentinal value (i.e., found),
> one can use the 'else' clause of a 'for' loop...
>
> pos = (line.split()[4]).split("_")[1]
> for (tag, (start,end)) in tags:
>     if tag in line:
>         print "    i_a/i_b/ROM/%s [%i:%i] LOC=%s" %\
>             (pos,tag,start,end)
>         break
> else
>     print "Error"
>
> --
> Hope this helps,
> Steven

Thanks for the responses.

I had an inkling what the solution may be, but I wondering whether I
could avoid the nested loops (i.e. loop every line and then loop every
pattern), maybe using maps or list comprehensions (this is just
intellectual curiosity as the current solution obviously does the job.

Steven



From gagsl-py2 at yahoo.com.ar  Fri Mar 23 05:11:20 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 06:11:20 -0300
Subject: python on window
References: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
Message-ID: <op.tpmw46b8x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 04:25:52 -0300, sandeep patil <san.gujar at gmail.com>  
escribi?:

> i have install python on window xp os.
> C:/program files/python
>
> i have done print program it working but .py can't  working
>  help me  to how i will execute this file this file where i will save
> it.
> path execution how .
> tell me about any envorment veriable in python to set before python
> editor run,it path. etc

You don't need to set any environment variable to run Python. (Perhaps  
PYTHONPATH, but *only* if you put modules into non standard places)

>>>> import posix
>
> Traceback (most recent call last):
>   File "<pyshell#4>", line 1, in <module>
>     import posix
> ImportError: No module named posix

That's ok: there is no module named "posix" on Windows, it is only  
available on Unix systems.

I've rearranged a bit your example. Write the following into a file named  
test.py - use whatever editor you like (even notepad):

---begin file test.py---
def invert(table):
     index = {}
     for key in table:
         value = table[key]
         if not index.has_key(value):
             index[value] = []
         index[value].append(key)
     return index

phonebook = {'sandeep':9325, 'amit':9822, 'anand':9890, 'titu': 9325}
print "Phonebook", phonebook

inverted_phonebook = invert(phonebook)
print "Inverted phonebook", inverted_phonebook
---end file test.py---

Then open a console window, change to the same directory where you saved  
test.py, and execute:

python test.py

You should get:

Phonebook {'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
Inverted phonebook {9890: ['anand'], 9325: ['titu', 'sandeep'], 9822:  
['amit']}

There are plenty of tutorials about Python. A good book -among others- is  
"Dive into Python"; you can buy the book, read it online, or even download  
it from http://www.diveintopython.org/

-- 
Gabriel Genellina



From rkmr.em at gmail.com  Sun Mar 18 12:38:08 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Sun, 18 Mar 2007 09:38:08 -0700
Subject: list comprehension help
In-Reply-To: <5f56302b0703180924o3ebf61e2nb2d50280456f8448@mail.gmail.com>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<5f56302b0703180924o3ebf61e2nb2d50280456f8448@mail.gmail.com>
Message-ID: <e04d2e90703180938y5401c765h41e286a15caceca1@mail.gmail.com>

On 3/18/07, Daniel Nogradi <nogradi at gmail.com> wrote:
> > I need to process a really huge text file (4GB) and this is what i
> > "list comprehension" can fast up things. Can you point out how to do
> > f = open('file.txt','r')
> > for line in f:
> >         db[line.split(' ')[0]] = line.split(' ')[-1]
> >         db.sync()
>
> What is db here? Looks like a dictionary but that doesn't have a sync method.
db is a handle for Berkely db that i open with import bsddb

import bsddb
db=bsddb.hashopen('db_filename')

> If the file is 4GB are you sure you want to store the whole thing into
> memory?
I dont want to load it in memory. Once I call the sync() function it
get synced to the disk, and it is not loaded completely.

> use list comprehension like this:
> db = [ line.split(' ')[-1] for line in open('file.txt','r') ]
> or
> db = [ ( line.split(' ')[0], line.split(' ')[-1] ) for line in
> open('file.txt','r') ]
>
> depending on what exactly you want to store.

line.split(' ')[0] is the key and line.split(' ')[-1] is the value.
THat is what I want to store.
Will the second line comprehension work in this case?


From bearophileHUGS at lycos.com  Thu Mar 15 14:43:24 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 15 Mar 2007 11:43:24 -0700
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
	<1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>
Message-ID: <1173984203.969423.150150@e65g2000hsc.googlegroups.com>

Alex Martelli:

> Right.  However, "return sum(1 for _ in iterator)" may be a handier way
> to express the same desctructive semantics as the last 4 lines here.

With the speed tests I have done my version did come out as the faster
one.

Bye,
bearophile



From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 23 07:30:00 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 23 Mar 2007 22:30:00 +1100
Subject: "finally" for unit test
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
Message-ID: <pan.2007.03.23.11.29.59.259448@REMOVE.THIS.cybersource.com.au>

On Fri, 23 Mar 2007 04:18:59 -0700, killkolor wrote:

> The problem now is that after each testrun I have to copy "fresh" files
> into the testdirectory, since of course the function already run on all
> the files and made the changes. So I implemented a buffering in the
> unittest functions: buffer the file, call the function, make the test,
> write the buffered file back. This works fine for unittests that do not
> fail. If a unittest fails though the function stops and the writing back
> is never done. Is there something like a finally for unittest functions?
> Or could I use another approach to buffer and write back my files (for
> each unittest function)?

A simple approach would be to copy the test files *before* running the
tests, instead of after. That way it doesn't matter if the tests fail or
not: the next run will simply replace the test files with known good
copies, regardless.



-- 
Steven.



From v.davis2 at cox.net  Sun Mar  4 17:38:27 2007
From: v.davis2 at cox.net (v.davis2)
Date: Sun, 4 Mar 2007 15:38:27 -0700
Subject: Snack -- Help
Message-ID: <ATHGh.312$S%2.291@newsfe06.phx>

Is anyone out there knowledgeable about using the Snack tool under Windows? 
Once I try to get beyond the simple provided examples I run out of reference 
material.
Thanks, Vic 




From robin at reportlab.com  Wed Mar  7 12:41:18 2007
From: robin at reportlab.com (Robin Becker)
Date: Wed, 07 Mar 2007 17:41:18 +0000
Subject: Recommended FastCGI module?
In-Reply-To: <W6tHh.1644$uo3.758@newssvr14.news.prodigy.net>
References: <W6tHh.1644$uo3.758@newssvr14.news.prodigy.net>
Message-ID: <45EEF93E.1020507@chamonix.reportlab.co.uk>

John Nagle wrote:
>    What's the recommended FastCGI module for Python.  There are at least five:
> 
> 	The Robin Dunn / Total Control Software version:
> 	http://alldunn.com/python/fcgi.py
>       	Last revised in 1998.
.......

we are using a slightly modified and modernized version of the above in a front 
facing app for a large company with reasonable results. Our decision was 
prompted by a consultant who wanted more speed, but it turned out the original 
traffic assumptions were wrong so the small advantage over CGI isn't actually 
needed. At the back end we're using apache+mod_fastcgi and choosing the 
configuration parameters was the main difficulty.

Using fcgi did induce some fairly careful code consideration to ensure we could 
rerun without blowing up the universe.
-- 
Robin Becker



From rmcore at gmail.com  Fri Mar  9 15:17:47 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Fri, 9 Mar 2007 14:17:47 -0600
Subject: merits of Lisp vs Python
In-Reply-To: <essbfq$ro4$1$830fa7a5@news.demon.co.uk>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<1huohy5.1273xi3mtqdc2N%aleax@mac.com>
	<essbfq$ro4$1$830fa7a5@news.demon.co.uk>
Message-ID: <95ACDB74-CEEC-409E-A2A8-14F6CE7D3018@gmail.com>


On Mar 9, 2007, at 1:10 PM, Tim Bradshaw wrote:
> On 2007-03-09 07:00:06 +0000, aleax at mac.com (Alex Martelli) said:
>
>> (nee "One Laptop Per Child", OLPC, and once known as the "$100  
>> laptop")
>> uses Python as its preferred (only?-) application language, and it's
>> slated to be the most widely distributed Python distro if it hits  
>> even
>> half of its ambitious target-numbers...
>
> But it won't get anywhere near that because it's a stupid an
> ill-conceived idea (not because of Python, note!).  The electronic
> gadget people need in the developing world is a mobile phone not a
> computer.

Isn't the idea to provide a learning environment for children in the  
developing world (rather than a generally useful gadget)?  Perhaps a  
mobile phone would also be good for this sort of thing -- if it had a  
'show source' button :-)

obpython: isn't OLPC is right in line with 'Computer Programming for  
Everybody'?









From steve at REMOVEME.cybersource.com.au  Wed Mar 14 04:25:46 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 14 Mar 2007 19:25:46 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
	<1173843736.982126.211530@l77g2000hsb.googlegroups.com>
	<pan.2007.03.14.07.02.32.652175@REMOVEME.cybersource.com.au>
	<7xabygti89.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.14.08.25.45.281805@REMOVEME.cybersource.com.au>

On Tue, 13 Mar 2007 23:08:38 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
>> > It should be possible to enumerate all sets of five numbers which sum
>> > to 50 and randomly select one of them.
>> 
>> Of course it's possible. It's also a very inefficient way of doing so. For
>> five numbers between 1 and 50, there are 50**5 = 312,500,000 possible sets
>> to enumerate. 
> 
> No there are only 2611 such sets and generating them takes about 0.5
> seconds on my laptop.  I posted the code for this elsewhere in the thread.

If you generate all the possible sets of five numbers between 1 and 50,
there are 50**5 of them, not 2611.

Naturally you don't have to store them all, and if you read what I wrote,
you'll see I never suggested that you have to store them all. That would
be silly. Of course you would use a generator.

Now that I've seen your _partition() function, I'm quite impressed. It is
still brute-force, but it avoids generating all 50**5 non-unique lists. By
my count, it only has to throw away 11,294 lists to generate the 2611
unique lists it returns.

And it is quite fast too: approximately 0.12 seconds on my PC.
Unfortunately, it doesn't scale. 

unique_partitions(60, 6) takes 0.8 seconds; unique_partitions(80, 8)
takes about 25 seconds; unique_partitions(80, 10) takes about 80 seconds,
and unique_partitions(81, 10) takes over 90 seconds.

So yes, your partition algorithm does avoid creating the millions of lists
which don't sum to 50, and that's a good thing. But it still brute-forces
thousands or millions of lists when only one is needed.

(E.g. unique_partitions(80, 10) returns 533,975 unique lists.
_partitions(80, 10) gives 3,233,568 non-unique lists.)



-- 
Steven D'Aprano 



From lew at nospam.lewscanon.com  Wed Mar 21 08:53:05 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Wed, 21 Mar 2007 08:53:05 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
Message-ID: <BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>

Xah Lee wrote:
> In a functional language, a function can be specified by its name and

Are you sure you know what a "functional language" is?

> parameter specs. For example:
> f(3)
> f(3, [9,2])
> f("some string")

This is not really "typical" syntax for a functional language. LISP, for 
example, has the "function name" as an element of a list. (Some might argue 
that LISP isn't exactly a functional language.)

Also, since you are commenting on Java, you should use "Java-like" syntax 
rather than "[9,2]". What is "[9,2]" intended to represent? The range of 
integers decreasing from 9 to 2, inclusive?

> For another example, usually a program needs to talk to another
> software such as a database software. 

Interesting use of the word "software".

> In essence, making the database useful to other software.

This is not a sentence.

> Such a list of function spec is often called API, which stands for Application
> Programing Interface.

"an API"

> The API terminology is abused by the marketing-loving Sun Microsystems
> by calling the Java language's documentation as ?The Java API?, even
> though Java the language and its paraphernalia of libraries and
> hardware-emulation system (all together jargonized as ?the Java
> Platform?) isn't a Application nor Interface. (a [sic] API implies that
> there are two disparate entities involved, which are allowed to
> communicate thru [sic] it. In the case of ?The Java API?, it's one entity
> talking to itself.).

This is incorrect in every factual detail. And what's with the editorial 
comment in the middle of the exposition ("marketing-loving", "jargonized")? 
How does that help explain the concepts, even if it were supportable by the 
evidence?

Sun calls the API documentation "the Java API documentation", not "the Java 
API", and not the language documentation, and the API is indeed an interface. 
An API need not be, and quite often is not, an application - being an 
application is in no wise part of being an API. And why in the world did you 
capitalize "Application" and "Interface"?

It's "an API", not "a API". It's "through", not "thru".

The statement about an "API" having to do with "two disparate entities" makes 
no sense. There is certainly nothing in the API that one can characterize as 
"one entity talking to itself". What "entities" do you imagine are involved?

> In general, the interface concept in programing is a sort of
> specification that allows different entities to call and make use of
> the other [sic], with the implication that the caller need not know what's
> behind the facade.

There is no antecedent for "the other", and you haven't defined "entities", 
and the word "interface" has a number of meanings "in general ... in 
programming". You should focus on the Java meaning (and your grammar).

> In the Object Oriented Programing Paradigm [sic], a new concept arose, that
> is the ?interface? aspect of a class.

Historical citation needed. And an interface is not an "aspect of a class".

> As we've seen, a function has parameter spec [sic] that is all there it [sic] is a
> user needs to know for using it. In Java, this is the method's
> ?signature?. Now, as the methodology of the OOP experience multiplies,
> it became apparent that the interface concept can be applied to
> Classes as well. Specifically: the interface of a class is the class's
> methods.

OK, I've had enough. I'd say you need a good editor to clean up the grammar, 
but then all you'd have is a better-written incorrect explanation.

-- Lew


From lobais at gmail.com  Sat Mar  3 06:35:56 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 12:35:56 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de> <pan.2007.03.02.23.12.08@gmail.com>
	<1172877633.676612.141450@31g2000cwt.googlegroups.com>
	<pan.2007.03.02.23.51.54@gmail.com>
	<1172881667.825628.93490@t69g2000cwt.googlegroups.com>
	<pan.2007.03.03.01.34.16@gmail.com> <54t0qsF22bn49U1@mid.uni-berlin.de>
Message-ID: <pan.2007.03.03.11.36.11@gmail.com>

Den Sat, 03 Mar 2007 11:26:08 +0100 skrev Diez B. Roggisch:

>> Well, you'd have to define the function inside the sortMoves function,
>> as it is where the variables exists.
>> 
>> def sortMoves(board, table, ply, moves):
>>     def sortKey(move):
>>         return getMoveValue(board, table, ply, move)
>>     moves.sort(key=sortKey, reverse=True) return moves
>> 
>> Wouldn't that make it create the callable at each call?
> 
> Yes, it does. But it's only created _once_ per sortMoves-call, and
> afterwards doesn't affect performance.

Sure, but I'm having a LOT of sortMove calls ;)

> And no, it's not slower than you lambda version - they _should_ be
> equally fast, if not it's neglible.

Sure, but the lambda version was too slow also.

> And also doesn't affect sorting-performance.

I know, but the sorting itself is really not the problem, as the lists 
only contain 5-30 items.


From anton.vredegoor at gmail.com  Thu Mar 22 14:00:18 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Thu, 22 Mar 2007 19:00:18 +0100
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <mailman.5471.1174584477.32031.python-list@python.org>
References: <mailman.5428.1174517933.32031.python-list@python.org>	<ettgei$rki$1@news2.zwoll1.ov.home.nl>	<mailman.5446.1174557039.32031.python-list@python.org>	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>	<mailman.5460.1174570842.32031.python-list@python.org>	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
Message-ID: <etul70$l3b$1@news4.zwoll1.ov.home.nl>

Michael Bentley wrote:

> Perhaps it is different where you live, but here you can put on your  
> resume relevant things that aren't paying jobs.  Otherwise nobody  
> would ever get their first job, right?

Sure you can. But around here if one has been unemployed for a while 
it's nearly impossible to get hired ever again. It doesn't matter how 
many years programming Python one puts on the resume. Unpaid activities 
are just not *visible*. So HRM people keep asking questions like 'But 
what have you been doing?' In the end I just started my own company, and 
while I'm not always employed as a freelancer I can at least now say I'm 
running my own business.

The basic problem however is that it's just not anyones business whether 
one has been walking through the country making pictures or doing some 
desk job. All that should matter is can he do the job and is he 
motivated. Asking a person who he *is* (resume) is not Pythonic!

Especially if one never reads the output.

A.


From Plissken.s at gmail.com  Fri Mar 23 01:40:17 2007
From: Plissken.s at gmail.com (Plissken.s at gmail.com)
Date: 22 Mar 2007 22:40:17 -0700
Subject: How can I check if the listdir result a directory?
Message-ID: <1174628417.345912.91410@l75g2000hse.googlegroups.com>

I have the following code which list out all the files/directories
under the current directory.

But how can I find out if 'f' is a directory?

for f in os.listdir("."):
     // how can I check if 'f' a directory?



From thinker at branda.to  Wed Mar 21 10:10:17 2007
From: thinker at branda.to (Thinker)
Date: Wed, 21 Mar 2007 22:10:17 +0800
Subject: Garbage collection
In-Reply-To: <etrd30$2rj$2@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>	<mailman.5392.1174484383.32031.python-list@python.org>
	<etrd30$2rj$2@gemini.csx.cam.ac.uk>
Message-ID: <46013CC9.8030100@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Tom Wright wrote:
> Thinker wrote:
>> How do you know amount of memory used by Python? ps ? top or
>> something?
>
> $ ps up `pidof python2.5` USER PID %CPU %MEM VSZ RSS TTY
> STAT START TIME COMMAND tew24 26275 0.0 11.9 257592 243988
> pts/6 S+ 13:10 0:00 python2.5
>
> "VSZ" is "Virtual Memory Size" (ie. total memory used by the
> application) "RSS" is "Resident Set Size" (ie. non-swapped physical
> memory)
>
>
This is amount of memory allocate by process not Python interpreter.
It is managemed by
malloc() of C library. When you free a block memory by free()
function, it only return
the memory to C library for later use, but C library not always return
the memory to
the kernel.

Since there is a virtual memory for modem OS, inactive memory will be
paged
to pager when more physical memory blocks are need. It don't hurt
much if you have enough
swap space.

What you get from ps command is memory allocated by process, it don't
means
they are used by Python interpreter.

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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0RgdHNHqWMEn2Ap7zQuOFaQ=
=/hWg
-----END PGP SIGNATURE-----



From goodTweetieBird at hotmail.com  Tue Mar 20 12:49:43 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 20 Mar 2007 09:49:43 -0700
Subject: if __name__ == 'main':
Message-ID: <1174409383.842776.264350@b75g2000hsg.googlegroups.com>

Hi,

I often see the following 'if' construct in python code. What does
this idiom accomplish? What happens if this is not main? How did I get
here if it is not main?

Thanks,

gtb

==============================================

if __name__ == 'main':
   myQuest('myQuest').Run()



From bbxx789_05ss at yahoo.com  Thu Mar 15 16:56:46 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 15 Mar 2007 13:56:46 -0700
Subject: problem with str()
In-Reply-To: <mailman.5149.1173990948.32031.python-list@python.org>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
	<mailman.5149.1173990948.32031.python-list@python.org>
Message-ID: <1173992205.985657.167970@y66g2000hsf.googlegroups.com>

Sheesh! You would think that after looking at every inch of the code
for way too many hours, at some point that would have poked me in the
eye.

Thanks all.



From Emile.Boudreau at cognos.com  Thu Mar 22 14:37:58 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Thu, 22 Mar 2007 14:37:58 -0400
Subject: Two Command prompts in parallels
Message-ID: <09042D621CD4AA479C678463F3A646D0E88B1E@sottemail1.ent.ad.cognos.com>

Hello,
	I have two batch files and I'm trying to run them in parallel. I
haven't been able to find any information on how to make python open 2
command prompt and then make each prompt run one of the batch files.

Can anyone point me in the right direction?

Thanks,

Emile Boudreau
 
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From gagsl-py2 at yahoo.com.ar  Tue Mar  6 05:10:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 Mar 2007 07:10:06 -0300
Subject: pytz2007c error
References: <1173171115.780320.203500@64g2000cwx.googlegroups.com>
	<1173174119.588427.315110@j27g2000cwj.googlegroups.com>
Message-ID: <op.torii4zhx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 06:41:59 -0300, looping <kadeko at gmail.com> escribi?:

> On Mar 6, 9:51 am, "looping" <kad... at gmail.com> wrote:
>>
>> >>> from pytz import timezone
>> >>> eastern = timezone('US/Eastern')
>>
>> I'm running python 2.5 on WinXP French with the egg from CheeseShop.
>>
>> Same error with all timezone (like timezone('Europe/Zurich'),
>> timezone('Europe/Amsterdam'), ...) except a few one:>>> print  
>> timezone('UTC')
>>
>> UTC
>>
>> Is this a pytz problem or something I didn't understand ?
>
> OK, the error come from datetime.utcfromtimestamp that doesn't support
> negative value.
> pytz try to pass -1633280400 to this function.
>
> Is this a problem from Windows ?

Perhaps it's a problem in pytz trying to go too far in the past...  
-1633280400 refers to a date around 1919.

-- 
Gabriel Genellina



From proteusguy at gmail.com  Mon Mar 19 06:09:08 2007
From: proteusguy at gmail.com (proteusguy at gmail.com)
Date: 19 Mar 2007 03:09:08 -0700
Subject: keyword arguments for xml-rpc
In-Reply-To: <5674bdF27eidlU1@mid.uni-berlin.de>
References: <1174296653.983861.47630@o5g2000hsb.googlegroups.com>
	<5674bdF27eidlU1@mid.uni-berlin.de>
Message-ID: <1174298948.585113.271270@n76g2000hsh.googlegroups.com>

Diez,

    Yes thanx - that (structs) is indeed where my confusion lies... :)
Alas, ordered parameters it is.


On Mar 19, 5:44 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> I don't see[1] the possibility to pass keyword arguments via XMLRPC. Where
> did you get that impression from? You can pass structs though, maybe that
> confused you?
>
> Diez
>
> [1]http://www.xmlrpc.com/spec




From nagle at animats.com  Sat Mar 10 15:24:23 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 10 Mar 2007 12:24:23 -0800
Subject: Database module & multithreading
In-Reply-To: <slrnev5s51.44o.jon+usenet@snowy.squish.net>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
Message-ID: <2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>

Jon Ribbens wrote:
> In article <54CIh.6545$M65.2077 at newssvr21.news.prodigy.net>, John Nagle wrote:
> 
>>     As for "some modules not being maintained", it really is sad
>>that MySQLdb is kind of behind.  If you're running Windows and need
>>MySQL, you're either stuck with Python 2.4
> 
> 
> Looks like that's changed:
> 
> http://sourceforge.net/project/showfiles.php?group_id=22307&package_id=15775

    Yes, that's a step forward.

    Although it's an ".egg" file.  If renamed to ".zip" and unpacked, it
seems to work.

    Is the "egg" packaging gimmick considered mainstream Python, or just some
wierd idea from the "Peak" people?  It seems to complicate installation
without adding much value.

					John Nagle


From ah at hatzis.de  Wed Mar  7 05:04:29 2007
From: ah at hatzis.de (Anastasios Hatzis)
Date: Wed, 07 Mar 2007 11:04:29 +0100
Subject: distutils: tweaking my ini to use relevant data_files path
Message-ID: <45EE8E2D.9060704@hatzis.de>

I would like to let my setup script know if the user has provided a 
custom path for the data_files of my distribution, e.g. by using the 
--install-data option, so the setup can automagically change a config 
information in my package to the local path applied, instead of using 
some default path I hard-coded into the config information. I could not 
find an appropriate pattern for this, but I'm rather confident that this 
is not too exotic and some of you already use such a pattern. Would be 
great to learn. Thank you in advance.

Following some details. My development version is Python 2.4.4 on 
Windows XP. My project contains a sdk.ini configuration file which is in 
the root package of my tool (by default in site-packages of course). 
This INI has a OSPDIR option for a path to some example *.osp files 
(data_files) coming with the distribution. These *.osp files are some 
work files that should be typically stored in an user's home directory 
or somewhere else, but not in the Python directory.

So, the setup() in my setup.py has (among many other arguments, which I 
don't consier to be important for my task here):

data_files=[('projects', ['projects/foo.osp', 'projects/bar.osp']),

By default this "projects" directory is going into the Python directory, 
right? At least I could see that in my Python 2.4.4 installation on 
Windows XP:

C:\Python24\projects\

My default config could be:
OSPDIR = os.path.join(sys.prefix, 'projects')

so, my tool should usually know where this directory is on a local machine.

But, as mentioned earlier, it makes much sense to have "projects" (and 
its contained data files) installed instead to another location, e.g. 
user home or D:\ etc. - of course this should work on any platform with 
Python and distutils.

I already learned, that user's can alter where setup distributes 
specific parts, such as the data_files with the --install-data option, 
see alternate installation 
http://www.python.org/doc/2.4.4/inst/alt-install-windows.html
or custom installation http://www.python.org/doc/2.4.4/inst/search-path.html

I think, this is reasonable for any user. But what do I need to do, to 
provide OSPDIR with this particular --install-data path applied by the 
user? Can I use OptionParser module (as I already do for my tools) in 
the setup.py which checks, if this option is given, and eventually which 
value it has, and somehow putting it dynamically into the OSPDIR variable?

a) Is --install-data the only way for users to customize path to data_files?
b) Am I right to parse --install-data in setup.py and change OSPDIR 
variable on the fly?
c) If yes, how do I add this to my setup.py? It currently has only a 
setup() call with plenty of arguments (no weired stuff, though). Do I 
need to put this verifcation before or after setup() or is there any 
callback or hook to use?

Many thanks for your support,
Anastasios


From mccredie at gmail.com  Mon Mar 26 16:55:38 2007
From: mccredie at gmail.com (Matimus)
Date: 26 Mar 2007 13:55:38 -0700
Subject: Python C extension providing... Python's own API?
In-Reply-To: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>
References: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>
Message-ID: <1174942538.061137.93130@r56g2000hsd.googlegroups.com>

On Mar 26, 12:21 pm, "Adam Atlas" <a... at atlas.st> wrote:
> Does anyone know if it would be possible to create a CPython extension
> -- or use the ctypes module -- to access Python's own embedding API
> (http://docs.python.org/api/initialization.html&c.)? Could a Python
> program itself create a sub-interpreter, and work with it with all the
> privileges and capabilities that an actual C program would have?
>
> I realize that this may be a bit too... mystical? ... for a lot of
> people's tastes, but I'm just curious if it's possible. :)

I think that is what the "code" module is for. Maybe not exactly what
you were expecting, but the capability you describe is already there.
Being able to access its own interpreter is one of the things that
makes Python a  dynamic language.



From gerard.blais at gmail.com  Tue Mar 20 18:35:00 2007
From: gerard.blais at gmail.com (Gerry)
Date: 20 Mar 2007 15:35:00 -0700
Subject: mysterious unicode
Message-ID: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>

I'm using pyExcelerator and xlrd to read and write data from and to
two spreadsheets.

I created the "read" spreadsheet by importing a text file - and I had
no unicode aspirations.

When I read a cell, it appears to be unicode u'Q1", say.

I can try cleaning it, like this:


    try:
        s.encode("ascii", "replace")
    except AttributeError:
        pass


which seems to work.  Here's the mysterious part (aside from why
anything was unicode in the first place):

                print >> debug, "c=", col, "r=", row, "v=", value,
"qno=", qno
                tuple = (qno, family)
                try:
                    data[tuple].append(value)
                except:
                    data[tuple] = [value]
                print >> debug, "!!!", col, row, qno, family, tuple,
value, data[tuple]

which produces:

c= 1 r= 3 v= 4 qno= Q1
!!! 1 3 Q1 O (u'Q1', 'O') 4 [1, u' ', 4]

where qno seems to be a vanilla Q1, but a tuple using qno is
(u'Q1', ...).

Can somebody help me out?



From albmont at centroin.com.br  Mon Mar 12 15:49:18 2007
From: albmont at centroin.com.br (Alberto Monteiro)
Date: Mon, 12 Mar 2007 17:49:18 -0200
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173728423.775330.164470@t69g2000cwt.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
	<1173728423.775330.164470@t69g2000cwt.googlegroups.com>
Message-ID: <20070312194749.M87441@centroin.com.br>

Goldfish wrote:
> 
> I run a mediawiki web site, and found a handy python-based library
> written to manage it called pywikipediabot at 
http://sourceforge.net/projects/pywikipediabot/.
> 
This sounds interesting. My daughter had a nightmare that a hacker
invaded her Orkut and blanked all 1500+ scraps. This is not impossible.
Maybe I should save the contents to a file...

Alberto Monteiro



From codecraig at gmail.com  Fri Mar  9 14:50:04 2007
From: codecraig at gmail.com (abcd)
Date: 9 Mar 2007 11:50:04 -0800
Subject: Are Lists thread safe?
In-Reply-To: <1173469517.797876.262330@t69g2000cwt.googlegroups.com>
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
	<1173469137.897102.298120@p10g2000cwp.googlegroups.com>
	<1173469517.797876.262330@t69g2000cwt.googlegroups.com>
Message-ID: <1173469804.756713.41700@q40g2000cwq.googlegroups.com>

I guess this might be overkill then...

class MyList(list):
    def __init__(self):
        self.l = threading.Lock()

    def append(self, val):
        try:
            self.l.acquire()
            list.append(self, val)
        finally:
            if self.l.locked():
                self.l.release()

....performing the same locking/unlocking for the other methods (i.e.
remove, extend, etc).



From john at castleamber.com  Sat Mar 24 18:34:38 2007
From: john at castleamber.com (John Bokma)
Date: 24 Mar 2007 22:34:38 GMT
Subject: bugs.python.org has been compromised (urgent)
Message-ID: <Xns98FDA8A1F7E2castleamber@130.133.1.4>

Just got comment spam in:

http:// bugs.py thon.org/file7722/order-cialis.html
http:// bugs.py thon.org/file7722/order-cialis.html order cialis 
http:// bugs.py thon.org/file7723/order-tramadol.html order tramadol 


Seems someone found a nice hole in python.org and someone should be 
severely spanked for allowing for JavaScript injection:

<script language=javascript>document.write(unescape('%3C%73%63%72%69%70 
...>

PS: I probably won't read this group much after this initial post, but my 
    email address in the header works.

PPS: comment spam has been reported the normal way as well.

-- 
John                               MexIT: http://johnbokma.com/mexit/
                           personal page:       http://johnbokma.com/
        Experienced programmer available:     http://castleamber.com/
            Happy Customers: http://castleamber.com/testimonials.html


From deets at nospam.web.de  Wed Mar  7 17:44:29 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 Mar 2007 23:44:29 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <1173304097.821562.75060@t69g2000cwt.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
Message-ID: <558tjdF222ejtU1@mid.uni-berlin.de>

Arnaud Delobelle schrieb:
> On Mar 7, 8:52 pm, Larry Bates <lba... at websafe.com> wrote:
> [snip]
>> Without knowing more about the functions and the variable it is somewhat
>> hard to tell what you are trying to accomplish.  If a, b, c are functions
>> that act on x when it is a different type, change to one function that
>> can handle all types.
> 
> I'm not really thinking about this situation so let me clarify. Here
> is a simple concrete example, taking the following for the functions
> a,b,c I mention in my original post.
>   - a=int
>   - b=float
>   - c=complex
>   - x is a string
> This means I want to convert x to an int if possible, otherwise a
> float, otherwise a complex, otherwise raise CantDoIt.
> 
> I can do:
> 
> for f in int, float, complex:
>     try:
>         return f(x)
>     except ValueError:
>         continue
> raise CantDoIt
> 
> But if the three things I want to do are not callable objects but
> chunks of code this method is awkward because you have to create
> functions simply in order to be able to loop over them (this is whay I
> was talking about 'abusing loop constructs').  

In your case, I don't consider it an abuse - au contraire. Because in 
such a situation where a possibly growing number of functions dealing 
with one value until one of them "fits" a loop is the natural thing to 
do, as it won't change in appearance just because you add a new 
conversion-function to some (semi-)global list. I'd consider it 
especially good style in that case.

Diez


From skip at pobox.com  Fri Mar 30 15:08:36 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 30 Mar 2007 14:08:36 -0500
Subject: LRU cache (and other things missing from the standard library ...)
In-Reply-To: <17933.20774.865681.868732@montanaro.dyndns.org>
References: <1100121983.30976.22.camel@bad.dynu.ca>
	<17933.20774.865681.868732@montanaro.dyndns.org>
Message-ID: <17933.24628.434148.606196@montanaro.dyndns.org>


    Evan> http://www.python.org/pypi?:action=display&name=lrucache&version=0.2

    skip> Couldn't get to your website, but I've been using this one I wrote
    skip> for several years:

    skip>     http://www.webfast.com/~skip/python/Cache.py

    skip> I'm just coming to this thread, so I don't know how it compares
    skip> with your requirements.

Wow...  Talk about a brain fart.  My email header summary rolled from the
last message to the earliest and I wound up responding to a message from (I
think) 2004!!!

Skip


From deets at nospam.web.de  Mon Mar 12 10:23:54 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 15:23:54 +0100
Subject: New to Python
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
	<1173704503.459048.310560@t69g2000cwt.googlegroups.com>
	<mailman.4964.1173705902.32031.python-list@python.org>
Message-ID: <55l63sF252nesU1@mid.uni-berlin.de>

> I do have previous experience with programming (much more than
> it's reasonable for one lifetime, BTW. I have the curse of never
> forgetting things I learn, so sometimes I catch myself thinking
> in archaic and extinct languages), but I found python particularly
> hard to learn (not as much as Haskell). Maybe I am not doing it
> the right way, trying to learn Python _and_ Python GUI interface
> at the same time.
> 
> For example, yesterday I wanted to open a window, draw some
> image, and make it move. I tried it with tkinter and with pygame,
> but I didn't succeed - there was no way I could find how to
> begin the image in the center of the window (!!!).
> 
> Such basic things are usually solved with a google search, like
> "python image position", but there was no inchantation I could utter
> that would bring me the effect I wanted (oops. Bad example. I guess
> "python image position" would give a useful answer...)
> 
> Another example, I found in pygame functions that would return
> something called an "EventList". But whenever I searched for
> "EventList" to see what is that, I got back to the page with
> the functions that returned the EventList :-)
> 
> Also, basic things like how does "+" operate on object "xxx"
> are impossible to google search.

For which language they are? And in python you've got the interpreter loop,
either explicitly by invoking python on the commandline and entering some
statements, or implicitly by putting a 

import pdb; pdb.set_trace()

call on a place where you are interested in toying around with objects. Then
you start poking around, and find out that a Eventlist is nothing but a
list - of events.

I think you just have to adjust to the much more dynamic nature of python a
bit.

Diez


From jzgoda at o2.usun.pl  Mon Mar 19 10:01:29 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 19 Mar 2007 15:01:29 +0100
Subject: XML based programming language
In-Reply-To: <567h7sF287idqU1@mid.uni-berlin.de>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
	<567h7sF287idqU1@mid.uni-berlin.de>
Message-ID: <etm5bc$c2i$1@nemesis.news.tpi.pl>

Diez B. Roggisch napisa?(a):

> I'm not sure where element-tree stands regarding this, but I think 4suite
> offers DTD, W3C-Schema and Relax-NG support.

This varies depending on implementation. As Fredrik Lundh's original
implementation is based on expat parser, it has no ability to check
anything besides well-formedness of document. AFAIK lxml implementation
exposes some of libxml2 abilities to check the document conformance to
XML schema definition.

-- 
Jarek Zgoda

"We read Knuth so you don't have to."


From rockym.z at gmail.com  Sun Mar 18 08:39:57 2007
From: rockym.z at gmail.com (Rocky Zhou)
Date: 18 Mar 2007 05:39:57 -0700
Subject: getopt or optparse options/arguments wrapping?
In-Reply-To: <_9OdneVkFJIhTWfYnZ2dnUVZ_vWtnZ2d@comcast.com>
References: <1174048469.334735.185750@l77g2000hsb.googlegroups.com>
	<_9OdneVkFJIhTWfYnZ2dnUVZ_vWtnZ2d@comcast.com>
Message-ID: <1174221597.288852.262760@y66g2000hsf.googlegroups.com>

Well, I think I must have more explanation on my script. The script's
usage is like this:
~# fs_backup
Lack of backup identity name
program usage: fs_backup [OPTIONS] $identity
    OPTIONS:
    -a|--append [t/x[L]:$path, append 1 dir or file to $identity
        t/x: include/exclude list, as -T/-X of 'tar'
        L:file, append a batch of dirs/files to $identity by LIST
    -d|--delete $path, delete 1 dir or file from $identity
    -t|--type $type, specify the backup type: full/diff/incr
    -D|--delete-outdated [f/d], delete outdated files/empty-dirs when
restoring.
    -o 'option=value'
    -w|--wrap 'wrap of tar options'
    -h|--help, print this help message


For example, I want to backup /var/www/html, with excluding /var/www/
html/syssite/home/cache, and name this backup as pages, I will do
this:
sh# fs_backup -a t:/var/www/html pages
sh# fs_backup -a x:/var/www/html/syssite/home/cache pages
# These t/x have the same meaning of tar's '-T/-X'
sh# fs_backup -t full pages
sh# fs_backup -t incr pages

These will update /var/fs_backup/.table, (/var/fs_backup is 'datadir',
you can configure it to anywhere you like by editing the configuration
file, /etc/new/fs_backup.config):
pages, full, 20070204-231749, pages/pages.full.20070204-231749
pages, incr, 20070205-101011, pages/pages.incr.20070205-101011
......

May be I want add something to 'pages':
sh# fs_backup -a t:/usr/local/apache2/htdocs pages
sh# fs_backup -t full pages

Once I want recovery from the backup, I will do this:
sh# fs_rstore pages
This fs_rstore is just a symlink to fs_backup. All the files from the
last full backup will be restored.

The actually thing the script done is like this:
2007-03-18 20:32:20 fs_backup DEBUG find /mnt/file/data/ -cnewer /var/
fs_backup/work/.ts ! -type d -print >>/tmp/fs_backup.work.incr.
1174221140.0.list
2007-03-18 20:32:20 fs_backup DEBUG find /mnt/file/work/ -cnewer /var/
fs_backup/work/.ts ! -type d -print >>/tmp/fs_backup.work.incr.
1174221140.0.list
2007-03-18 20:32:20 fs_backup DEBUG tar -czp -P -f /var/fs_backup/work/
work.incr.20070318-203220.tgz -T /tmp/fs_backup.work.incr.
1174221140.0.list .identity .dirs .files

.dirs .files is just a snapshot of the current directories, which can
be used to delete-outdated files when restoring. Here I used absolute
path by using tar's -P parameter. When fs_rstore, it will do this:
command = "tar -xpz -P -f %s.tgz -T %s" % (archive, self.t_files)

maybe I want add some parameters of tar, for example, --strip-path=X,
so I hope the fs_rstore can do this:
sh# fs_rstore pages --strip-path=X
rather than:
sh# fs_rstore pages -w '--strip-path=X'

What should I do?

Thank you.



From robert.kern at gmail.com  Mon Mar 12 13:27:37 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 12 Mar 2007 12:27:37 -0500
Subject: nonlinear interpolation
In-Reply-To: <1173717319.977458.323280@q40g2000cwq.googlegroups.com>
References: <1173713333.615789.287070@v33g2000cwv.googlegroups.com>	<7x7itm8m02.fsf@ruckus.brouhaha.com>
	<1173717319.977458.323280@q40g2000cwq.googlegroups.com>
Message-ID: <et42ic$o7u$1@sea.gmane.org>

Michele Simionato wrote:
> On Mar 12, 5:28 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>> "Michele Simionato" <michele.simion... at gmail.com> writes:
>>> Any pointer would be well received :)
>> Dunno about those libs but it helps to understand the mathematical
>> options.  Numerical Recipes by Teukolsky et al has understandable,
>> cookbook-like advice about this stuff.  I'm told that true numerics
>> gurus scoff at it but it's at least a start.
> 
> No, I know about Numerical Recipes, I want an already-made solution.
> For instance I found one here
> http://dirac.cnrs-orleans.fr/ScientificPython/ScientificPythonManual/Scientific.Functions.LeastSquares-module.html
> but I wonder if I should use numpy or something else, since
> I am not following the progresses in numerical Python these days.

It sounds like you want nonlinear curve fitting rather than interpolation. I do
recommend using numpy as the underlying array package, but it does not provide
any curve fitting itself. The 2.7 branch of ScientificPython can work with numpy
instead of Numeric, if you like. See the README.

  http://sourcesup.cru.fr/projects/scientific-py/

scipy also has a variety of curve fitting routines at the expense of a more
involved install. scipy.optimize.leastsq() might be sufficient for you, but the
scipy.odr package is much more flexible (but get scipy from SVN for that; the
latest release has some unfortunate bugs in that package).

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From xiong.xu.cn at gmail.com  Sun Mar 18 10:05:18 2007
From: xiong.xu.cn at gmail.com (imx)
Date: 18 Mar 2007 07:05:18 -0700
Subject: cannot start IDLE in WinXP
In-Reply-To: <mailman.5243.1174211231.32031.python-list@python.org>
References: <1174129756.325715.22280@e1g2000hsg.googlegroups.com>
	<mailman.5243.1174211231.32031.python-list@python.org>
Message-ID: <1174226718.035181.198830@n59g2000hsh.googlegroups.com>

On 3?18?, ??5?47?, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Sat, 17 Mar 2007 08:09:16 -0300, imx <xiong.xu... at gmail.com> escribi?:
>
> > Enviroment: WinXP sp2, python 2.5
> > problem: click IDLE using shorcut menu or run phthonw.exe directly,
> > nothing happen! But running python.exe from the command line is fine.
>
> pythonw.exe does not open a window so it's almost invisible.
> IDLE now uses a socket to connect to the subprocess which runs the python
> code; perhaps your firewall is blocking that connection. Try starting IDLE
> with the -n switch.
>
> --
> Gabriel Genellina

Thanks for reply, I've already reinstall xp and now IDLE is ok.

-Xiong



From johnjsal at NOSPAMgmail.com  Fri Mar 30 14:20:28 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 30 Mar 2007 14:20:28 -0400
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <460d4f36$0$10784$c3e8da3@news.astraweb.com>
References: <euid24$ugc$1@online.de> <euig08$fv3$2@news2.u-psud.fr>
	<460d4f36$0$10784$c3e8da3@news.astraweb.com>
Message-ID: <460d54f0$0$10774$c3e8da3@news.astraweb.com>

John Salerno wrote:
> Laurent Pointal wrote:
> 
>> With Python:
>> * pygame + build your drag'n drop features
>> * if you like 3D, vpython.
>>
>>
>> http://www.pygame.org/
>> http://www.vpython.org/
> 
> Wow, vpython looks pretty  need.

neat*  :)


From aleax at mac.com  Sat Mar  3 20:54:15 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 17:54:15 -0800
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
	<45e9b753$0$8983$4c368faf@roadrunner.com>
	<1huecz7.1thcn0b1j64biiN%aleax@mac.com>
	<1172960883.340892.183850@31g2000cwt.googlegroups.com>
Message-ID: <1hueupp.1dcf9wl17pyf2bN%aleax@mac.com>

MonkeeSage <MonkeeSage at gmail.com> wrote:

> On Mar 3, 1:29 pm, a... at mac.com (Alex Martelli) wrote:
> > It would be nice, yes, weren't it for the inevitable irregularity, one
> > way or another, caused by the clash between attributes and items.
> 
> In thinking about it, I think this might fall under 'we're all
> consenting adults here'. I mean, you can shadow the dict constructor
> from the toplevel if you're so inclined (or don't know any better).
> But you could make it harder to accidentally shadow builtin
> attributes:
> 
> from warnings import warn
> class attrdict(dict):
>     __builtins__ = dir(dict)
>     def __init__(self, *args, **kwargs):
>         dict.__init__(self, *args, **kwargs)
>         for k, v in self.items():
>             dict.__setattr__(self, str(k), v)
>     def __setitem__(self, k, v):
>         if k in self.__builtins__:
>             warn('shadowing builtin attribute: %s' % k,
> RuntimeWarning, 2)
>         dict.__setitem__(self, k, v)
>         dict.__setattr__(self, str(k), v)
>     __setattr__ = __setitem__
> 
> a = attrdict([(1,2)], a=3, b=4)
> a.update = 'test'

Besides missing the warning in the __init__, this also has pretty weird
behavior whenever subject to a .pop, .update, .setdefault, del of either
item or attr, etc, etc: the attributes and items "get out of sync" (and,
catching each and every mutating-method to keep the separate dicts of
items and attrs in perfect sync is somewhat of a nightmare).

If the consenting adults in question WANT totally murky, irregular,
buggy behavior hiding under every corner -- why are they using Python in
the first place?  It's so much easier to make such utter messes in other
languages, after all.

It's impossible to make something foolproof, because fools are so
ingenious; Python tends to keep them at bay by cultural forces (a strong
collective bias towards simplicity, regularity, correctness).  The
neverending quest to confuse attributes and items (inevitably leading to
complications, irregularity, and bugs) is better pursued in other
languages -- just about ANY other language except Python.


Alex


From alan.franzoni_invalid at geemail.invalid  Sun Mar 18 20:17:39 2007
From: alan.franzoni_invalid at geemail.invalid (Alan Franzoni)
Date: Mon, 19 Mar 2007 01:17:39 +0100
Subject: python QT or python-GTK
References: <45fdb561$0$17201$4c368faf@roadrunner.com>
Message-ID: <84sw3fntqzoc.1iqh70kes78uz.dlg@40tude.net>

Il Sun, 18 Mar 2007 11:55:47 -1000, Jon Van DeVries ha scritto:

> Please correct me if I'm wrong, I'm a newbie.

Please understand then, that both QT and GTK+ are graphic toolkits. An IDE
is a totally different thing.

Also, please understand that Qt3 and Qt4 exist, and they're quite different
beasts. Qt4 is fairly new.

Qt is GPL or commercial, while GTK+ is LGPL. That means: if you want to use
QT, you must either distribute your app under the GPL, or buy the
commercial license, while you don't have this limit in GTK+.

Both are cross-platform, but you should check for their actual visual
performance wherever they should be employed. Also, GTK+ seems to still
need an X server on macosx (don't know about QT)

Both have IDEs to create GUIs; take a look at Glade or Gazpacho for GTK+.

Also, remember GTK+ is a community project while QT is a fully commercial
project.



-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From TPhung at lbl.gov  Sat Mar 17 15:15:44 2007
From: TPhung at lbl.gov (TPhung at lbl.gov)
Date: 17 Mar 2007 12:15:44 -0700
Subject: running python on xp command prompt
Message-ID: <1174158944.537266.120680@d57g2000hsg.googlegroups.com>

Hi,

I have a simple question about running python on windows xp command
prompt. The file is as follows and is named spam.py:

print 2**8
print 'the bright side' + 'of life'
print "hello world"

I run this on the command prompt as follows

C:\Documents and Settings\User>python C:\Documents and Settings\User
\Desktop\spa
m.py
python: can't open file 'C:\Documents': [Errno 2] No such file or
directory

and get the error above. If I surround the second directory in quotes
like this

C:\Documents and Settings\User>python "C:\Documents and Settings\User
\Desktop\spa
m.py"

, there is no error. Does anyone know why this is.

Thank you



From aleax at mac.com  Sat Mar  3 14:29:42 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 11:29:42 -0800
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
	<45e9b753$0$8983$4c368faf@roadrunner.com>
Message-ID: <1huecz7.1thcn0b1j64biiN%aleax@mac.com>

Andrew Coffman <pragmatic.python at gmail.com> wrote:

> Could you do something like this?
> 
> class attrdict(dict):
>      def __getattr__(self, attr):
>          if self.has_key(attr):
>              return self[attr]
>          else:
>              message = "'attrdict' object has no attribute '%s'" % attr
>              raise AttributeError, message
> 
> If you have a dict item with the same name as a method in the class, you
> won't be able to get to it using syntax sugar, though.

Yes.  In __setattr__, you can choose what to do in that case (it doesn't
seem to make sense to be able to *assign* to foo.get without being able
to *access* as foo.get whatever you've assigned).

> It doesn't seem that the syntax sugar saves you much typing anyway 
> (a.foo vs. a['foo']), but perhaps it seems nicer in some aesthetic sense.

It would be nice, yes, weren't it for the inevitable irregularity, one
way or another, caused by the clash between attributes and items.

If, instead of subclassing dict, one wrapped it (and properly coded just
a few specialmethods, no ordinary ones), the overall effect could be
more regular (probably still with some limitation, since the dict does
need to be kept somewhere, and keys clashing with the special methods'
names would still have to be forbidden or otherwise specialcased).


Alex


From cedb816 at yahoo.com  Sun Mar 11 07:03:36 2007
From: cedb816 at yahoo.com (ce)
Date: 11 Mar 2007 04:03:36 -0700
Subject: a better solution for GUI in python
Message-ID: <1173611016.810735.70700@30g2000cwc.googlegroups.com>

Hi,

My company is using python currently for our website. We need to
develop a GUI front-end for our ERP that would be portable (Windows
and Linux).

My question is which solution would be better for the GUI (and easier
to implement)? I knew there are something like wxidgets, QT and pyGTK?
actually we will need some complicated stuff in the GUI and yet I
don't know much about GUI programming.

Any recommendation guys?



From duncan.booth at invalid.invalid  Mon Mar  5 09:13:04 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Mar 2007 14:13:04 GMT
Subject: ANN: pyftpdlib 0.1 released
References: <1173102514.190879.7600@p10g2000cwp.googlegroups.com>
Message-ID: <Xns98EA90A109B37duncanbooth@127.0.0.1>

"billiejoex" <gnewsg at gmail.com> wrote:

> Hi all,
> I'm proud to announce the first beta release of pyftpdlib available at
> the following urls:

Announcing it once will do. Three times with minor edits is a bit much.


From newsgroups at nospam.nowire.org  Sat Mar 31 08:44:01 2007
From: newsgroups at nospam.nowire.org (=?windows-1252?Q?Thomas_Kr=FCger?=)
Date: Sat, 31 Mar 2007 14:44:01 +0200
Subject: os.system questions
In-Reply-To: <mailman.5804.1175341245.32031.python-list@python.org>
References: <mailman.5804.1175341245.32031.python-list@python.org>
Message-ID: <eull2h$3j8$1@ariadne.rz.tu-clausthal.de>

Eric Price schrieb:
> up = os.system("uptime")
> How do I assign the output of "uptime" to the variable "up"?

| >>> print os.system.__doc__
| system(command) -> exit_status
|
| Execute the command (a string) in a subshell.

os.system returns the exitcode of the given command. To get the output
try os.popen to os.popen4 or the commands lib.

Thomas


From nagle at animats.com  Mon Mar 12 13:53:19 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 12 Mar 2007 17:53:19 GMT
Subject: Watching a file another app is writing
In-Reply-To: <1173676363.653940.133030@30g2000cwc.googlegroups.com>
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
	<1173676363.653940.133030@30g2000cwc.googlegroups.com>
Message-ID: <jsgJh.9412$jx3.2696@newssvr25.news.prodigy.net>

Nick Vatamaniuc wrote:
> On Mar 11, 3:36 pm, Gordon Airporte <JHoo... at fbi.gov> wrote:
> 
>>I'm trying to find a way to take a file that another program has opened
>>and writes to periodically, open it simultaneously in Python, and
>>automatically update some of my objects in Python when the file is
>>written to.
>>I can open the file and manually readlines() from it to keep up to date,
>>it's the automatic part I'm having trouble with. This is on Windows.
> 
> 
> You might need to look at pywin32 for Windows specific ways to listen
> to "file changed" event.
> 
> On Unix a quick shortcut would be to simply read the output of 'tail -
> f <file>' command...

    "tail -f" just checks the file size once a second.  It's not doing
anything exciting.

    Windows, of course, actually has a mechanism for finding out that
files have changed, so that will work.

    Note that if you're doing this as a means of interprocess
communication, there are better ways.

					John Nagle


From MonkeeSage at gmail.com  Tue Mar  6 17:21:33 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 6 Mar 2007 14:21:33 -0800
Subject: SPE python IDE: Call for testers!
In-Reply-To: <1173185519.537841.86410@64g2000cwx.googlegroups.com>
References: <1173185519.537841.86410@64g2000cwx.googlegroups.com>
Message-ID: <1173219693.540708.81400@c51g2000cwc.googlegroups.com>

Very nice. One issue I've come across is that it doesn't seem to work
with < wxwidgets-2.8 (segfault when trying to load a file), so you
should probably set MIN_WX_VERSION to 2.8.

Regards,
Jordan



From dbhbarton at googlemail.com  Fri Mar  9 12:10:05 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 09:10:05 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <55ddvkF251n88U1@mid.uni-berlin.de>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
	<1173449933.926669.90810@n33g2000cwc.googlegroups.com>
	<55d9ehF24cdi0U1@mid.uni-berlin.de>
	<1173452206.029944.255750@j27g2000cwj.googlegroups.com>
	<55ddvkF251n88U1@mid.uni-berlin.de>
Message-ID: <1173460205.692316.65980@64g2000cwx.googlegroups.com>

> But all of them are clear on how they work: they affect one line, or have a
> bracket style like /* */ and thus demark clearly what they affect. Even
> someone not fluent in the language in question will quickly grab what they
> mean.

There's nothing remotely fuzzy about how wip or halt comments would
work, nor anything unclear about what they would affect. Nor are they
remotely difficult to explain. They just haven't been employed before,
to my knowledge, even though the underlying effects seem to be a
reasonably common requirement.

> But the key-difference is that the comment in python has a meaning for the
> interpreter - ignore this.

OK that is true. But it's true for the halt comment as well.


> The ? has no meaning. It only has a meaning for an editor.

So it _does_ have meaning! I'm sorry I just don't buy into this kind
of abstract programming ideology, and I never really have. I don't
care what the interpreter finds meaningful and neither, on a day to
day basis, do most users, I'm sure. It seems like the same kind of
aesthetic ideology that leads lots of programmers to feel repulsed by
Python's whitespace block delimiting. There's a more important
principle being missed by them: the human factor. The guy or gal who's
actually _using_ this stuff. BTW I don't mean to imply that you're not
thinking about human readability / useability, just that you don't
seem to be arguing from that basis.


> Not in my opinion -

;p


> > Would if I could!
>
> Well, grab eric3, it's written in python, and teach it to do so! It's an
> exercise in python then :)

I may do that. Thanks for bringing it to my attention.


> > What we're talking about here is a form of 'alternate commenting
> > style'. With the IDE's cooperation it'd work on whole blocks at once,
> > it would highlight without disrupting the code concerned (at least the
> > way I'm envisaging it), it would be versatile (could probably be used
> > for as big a variety of purposes as the # comment), and yes, it'd be
> > persistent, which is how it would be different from any IDE-based
> > highlighting.
>
> I think you contradict yourself here. On the one side, you want it not
> disturbing to the eye, yet it should be highlighted, so it will be directly
> noticed by that same eyes.

You misread me. I wasn't talking about visual disturbance but 'code
disturbance'. Let me rephrase..
"..it would highlight without causing the highlighted code to be
ignored by the interpreter.."


> it _is_ an disturbance. And with an IDE that stores such information in
> e.g. project metainformation, you can even have the persistence, without
> the disturbance and without altering python.

So it's fine and wonderful to add a massive chunk of code to IDEs to
introduce jargon-strewn behaviour that newbies have little hope of
comprehending yet alone taking advantage of, and which will inevitably
behave differently in any IDE that does get around to providing it?
But adding two special characters to the core language is 'messy'?

I can't argue with your aesthetic dislike of the proposed syntax, it's
just the reasoning you use to support your stance that doesn't ring
true to me! (I trust no offense is caused.)



From b.r.willems at gmail.com  Sat Mar 31 14:45:38 2007
From: b.r.willems at gmail.com (Bart Willems)
Date: Sat, 31 Mar 2007 14:45:38 -0400
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <oqks03h3h5tldjodga4and8ua3hej6a1uq@4ax.com>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
	<oqks03h3h5tldjodga4and8ua3hej6a1uq@4ax.com>
Message-ID: <1WxPh.419$Hg1.345@newsfe12.lga>

> 
> Even better: pick one entry of your choice from
> 
> http://images.google.com/images?q=%22don%27t+feed+the+troll%22
> 
> 
> Michele

OMG and here I am thinking that Ken Rockwell's site is full of crap. 
This one's worse... Does the guy have a job? Or a life?


From sbassi at clubdelarazon.org  Sat Mar 17 23:48:58 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Sun, 18 Mar 2007 00:48:58 -0300
Subject: How to parse the os.system() output in python
In-Reply-To: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>
References: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>
Message-ID: <9e2f512b0703172048j1e71518dy416aad97855d15ce@mail.gmail.com>

On 17 Mar 2007 17:28:56 -0700, yinglcs at gmail.com <yinglcs at gmail.com> wrote:
> I use os.system() to execute a system command in python.
> Can you please tell me how can I parse (in python) the output of the
> os.system()  ?

Maybe you mean to parse the output of the program you run using
os.system. If this is the case, you should redirect the putput of the
program to a file (with ">") and then parse that file.

Best,
SB.


From noone at nowhere.com  Thu Mar 29 08:17:53 2007
From: noone at nowhere.com (Josh)
Date: Thu, 29 Mar 2007 08:17:53 -0400
Subject: Weird behavior in search in a list
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
	<1175169306.021284.46270@e65g2000hsc.googlegroups.com>
Message-ID: <460baee0$0$14142$b45e6eb0@senator-bedfellow.mit.edu>


"Su Y" <suyuancn at gmail.com> wrote in message 
news:1175169306.021284.46270 at e65g2000hsc.googlegroups.com...
On 3??29??, ????7??51??, "Su Y" <suyua... at gmail.com> wrote:
> hi all,
> I can't understand how this code work, its behavior is really weird
> for me...
>
> I want find the first number in extend[] which is larger than num, soI 
> wrote:
>
> def find(num):
>     count=0
>     for elem in extend:
>         if elem<num:
>             count+=1
          else:
             break
>     return count
>
you need to break out of the loop when you first encounter num>elem. The 
reason it works in your sorted list scenario is because elem will be > num, 
always, after some point. It won't be in your unsorted list.

I've added the else: break in your code above
j




From gagsl-py2 at yahoo.com.ar  Wed Mar  7 05:51:07 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 07:51:07 -0300
Subject: How to build a Windows service using win32?
References: <3486.168.103.93.50.1173263156.squirrel@maps.hostgis.com>
Message-ID: <op.tote3hc4x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 07:25:56 -0300, Gregor Mosheh <gregor at hostgis.com>  
escribi?:

> I'm trying to write a Win32 service. The following is straight from  
> Python
> Programming on Win32 and it doesn't work. Is that book out of date; is
> there a new way to do services? I searched Google for hours trying to  
> find
> any other method, and have been beating on this one for 5 more hours.

Have you installed the pywin32 package from  
https://sourceforge.net/projects/pywin32/ ?
The code skeleton looks OK to me.

-- 
Gabriel Genellina



From bdesth.quelquechose at free.quelquepart.fr  Sun Mar 11 17:15:10 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 11 Mar 2007 22:15:10 +0100
Subject: Need help in using mod_python
In-Reply-To: <1173638925.764275.78690@n33g2000cwc.googlegroups.com>
References: <1173560794.835409.34400@v33g2000cwv.googlegroups.com>
	<45f43bf9$0$31995$426a74cc@news.free.fr>
	<1173638925.764275.78690@n33g2000cwc.googlegroups.com>
Message-ID: <45f46936$0$31982$426a34cc@news.free.fr>

yinglcs at gmail.com a ?crit :
> On Mar 11, 1:02 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>>ying... at gmail.com a ?crit :
>>
>>
>>
>>
>>>Hi,
>>
>>>I am trying to setup Apache with Trac which uses mod_python. I get the
>>>following error:
>>
>>>assert have_pysqlite > 0
>>
>>>And I have verify this  via command line as well, that seem no
>>>problem.
>>
>>(snip)
>>
>>What do you get using tracd (the standalone server) ?
> 
> 
> I am using apache with mod_python.

You're trying to, yes. But what *I*'m asking *you* is what you get using 
tracd.

> I have done a sanity check with command prompt,

using your account's env

> it can find
> 'pysqlite',
> But when I access Trac using Apache (via mod_python),

which uses a somewhat different (and very restricted) env...

> it somehow can't
> find 'pysqlite' and gives me an error.
> 
> So my question is how python command prompt loads library differently
> from mod_python?

I know I'm a little bit dumb, but I had perfectly understood your 
question (which BTW is not posted at the best place - both Trac and 
mod_python have dedicated mailing-lists). Can you imagine that I have 
good reasons to ask you what you get using tracd ?


(re-snip already snipped code)


From newsuser at stacom-software.de  Thu Mar  8 07:28:39 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Thu, 08 Mar 2007 13:28:39 +0100
Subject: Howto find dict members from a list of keys
In-Reply-To: <mailman.4794.1173345912.32031.python-list@python.org>
References: <esogs0$41a$1@online.de>	<mailman.4790.1173342408.32031.python-list@python.org>	<pan.2007.03.08.08.37.48.318909@REMOVEME.cybersource.com.au>
	<mailman.4794.1173345912.32031.python-list@python.org>
Message-ID: <esovdf$tmm$1@online.de>

Yes it was the silly on-liner ... it was a bit ago I used it last time ... thanks

Gabriel Genellina schrieb:
> En Thu, 08 Mar 2007 05:37:48 -0300, Steven D'Aprano 
> <steve at REMOVEME.cybersource.com.au> escribi?:
> 
>> On Thu, 08 Mar 2007 05:26:22 -0300, Gabriel Genellina wrote:
>>
>>> found_dic_members = [d[key] for key in l]
>>
>> *self stares at the line of code*
>>
>> *self thinks about what he just posted*
>>
>> *self realises with acute embarrassment that he's jumped to conclusions
>> and completely misunderstood the Original Poster's question*
>>
>> Oops! I'll just be slinking away now...
> 
> LOL! :)
> 
> (...now! But when I saw your previous post, I had to check whether it 
> was *me* who misunderstood the OP answering with a silly one-liner...)
> 
> 
> --Gabriel Genellina
> 


From khemkaamit at gmail.com  Sat Mar 31 08:51:45 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Sat, 31 Mar 2007 18:21:45 +0530
Subject: os.system questions
In-Reply-To: <BAY114-F8E0A631C40E1C39EE6EF8A0620@phx.gbl>
References: <BAY114-F8E0A631C40E1C39EE6EF8A0620@phx.gbl>
Message-ID: <1360b7230703310551v46e56295l45270b060abba6ee@mail.gmail.com>

On 3/31/07, Eric Price <soyouthinkimgonnalikethis at hotmail.com> wrote:
> Hi;
> I have a couple bugs to work out in the below script; namely, I don't know
> how to capture the result of an os.system command, nor am I convinced that
> the call to os.system actually results in the execution of the command. Here
> is the script:
>
> #!/usr/local/bin/python
> import re, os
>
> def freshReboot():
>         up = os.system("uptime")
>         if re.search('day|hour', up):
>                 pass
>         else:
>                 first = up
>                 tup = re.split('min', up)
>                 first = tup[0]
>                 n = len(first)
>                 char = first[n-3:n-2]
>                 if re.match(' ', char):
>                         os.system("/usr/local/etc/rc.d/zz_mysql_starter_script.sh")
>
>
> Here are my problems:
>
> up = os.system("uptime")
> How do I assign the output of "uptime" to the variable "up"?
>
> os.system("/usr/local/etc/rc.d/zz_mysql_starter_script.sh")
> When I substitute a test variable for "up", I don't get this script to
> actually run. Everything else is tested and works. Why won't this script
> run?

os.system doesn't allow you to get the output of the program, use
os.popen instead.
example:
import os
up = os.popen('uptime').readlines()

Cheers,

-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From DustanGroups at gmail.com  Sun Mar 18 09:21:27 2007
From: DustanGroups at gmail.com (Dustan)
Date: 18 Mar 2007 06:21:27 -0700
Subject: Private data
In-Reply-To: <1174220701.206419.77780@e65g2000hsc.googlegroups.com>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.12.06.32.760433@REMOVE.THIS.cybersource.com.au>
	<1174220701.206419.77780@e65g2000hsc.googlegroups.com>
Message-ID: <1174224087.024303.102130@n59g2000hsh.googlegroups.com>

On Mar 18, 7:25 am, "Dustan" <DustanGro... at gmail.com> wrote:
> On Mar 18, 7:06 am, Steven D'Aprano
> > First, an example of the code in action.
>
> > >>> import PrivateAttributes
> > >>> obj = PrivateAttributes.TestPrivateClassAttributes()
> > >>> obj.getNumInstances()
> > 1
> > >>> another = PrivateAttributes.TestPrivateClassAttributes()
> > >>> obj.getNumInstances()
> > 2
> > >>> athird = PrivateAttributes.TestPrivateClassAttributes()
> > >>> athird.getNumInstances()
>
> > 3
>
> > The getNumInstances method reports the number of instances of the
> > PrivateAttributes class. There's no obvious class attribute where this
> > count is being kept:
>
> > >>> obj.__class__.__dict__.keys()
>
> > ['__module__', 'getNumInstances', '__dict__', '__weakref__', '__doc__',
> > '__init__']
>
> > Here's how to hack it, and make it report wrong numbers.
>
> > >>> c = obj.getNumInstances.func_closure
> > >>> c[1].cell_contents.numInstances = -300
>
> > >>> athird.getNumInstances()
> > -300
> > >>> afourth = PrivateAttributes.TestPrivateClassAttributes()
> > >>> athird.getNumInstances()
>
> > -299
>
> > So yes, it is absolutely hackable.
>
> I did have a feeling that it was hackable, but had no idea how one
> could possibly go about hacking it (I was starting to wonder of there
> was a way to apply locals() and globals() on functions). But now I
> (ehem) sorta know how it's done.
>
> > Now, I'm hardly a Python guru, but in about fifteen minutes I followed the
> > trail through the object chain, and found how to hack this. An real guru
> > would probably do it in three minutes.
>
> > I was helped a bit by having the source code. But even without the source
> > code, I reckon I could have done it in an hour or so, if I was motivated
> > enough. All the tools you need are a Python interactive session, the dir()
> > function and the dis module.
>
> I have used all of those before, but I haven't been able to fully
> understand the output of the dis module; maybe that's my problem.

Alright, perhaps you can help me out with this learning curve here. I
have seen, but not worked with, some basic assembly code, so I think I
have a vague idea of what it all means, although I have a feeling it's
not all valid assembly (on any widely used machine).

First I dis.dis'd testPrivateStaticFunctionVariables:

>>> dis.dis(testPrivateStaticFunctionVariables)
 21           0 LOAD_DEREF               0 (func)
              3 LOAD_DEREF               1 (internalData)
              6 LOAD_FAST                0 (args)
              9 CALL_FUNCTION_VAR        1
             12 RETURN_VALUE

At first I was a little confused by this, because there's no increment
in sight, but then I realized it was dis.dis'ing the wrapper closure
in the internalDataDecorator closure in the PrivateDataEngine function
(and then I hit myself on the head and cried out "doh!"). So that
'code' is coming from this (taken out of closure):

def wrapper(*args):
    return func(internalData, *args)

So, based on what you showed me, I found my way after some failed
tries to this:

>>> dis.dis(testPrivateStaticFunctionVariables.func_closure[0].cell_contents)
 28           0 LOAD_FAST                0 (internalData)
              3 DUP_TOP
              4 LOAD_ATTR                0 (numCalls)
              7 LOAD_CONST               1 (1)
             10 INPLACE_ADD
             11 ROT_TWO
             12 STORE_ATTR               0 (numCalls)

 29          15 LOAD_FAST                0 (internalData)
             18 LOAD_ATTR                0 (numCalls)
             21 RETURN_VALUE

That's coming from this:

@PrivateDataEngine(numCalls = 0)
def testPrivateStaticFunctionVariables(internalData):
    """returns the number of times this function has been called."""
    internalData.numCalls += 1
    return internalData.numCalls


Here's a few questions on this output, for which I would highly
appreciate some answers:

What's the difference between 'LOAD_DEREF', 'LOAD_FAST', and
'LOAD_CONST', and, as seen at http://docs.python.org/lib/module-dis.html,
'LOAD_GLOBAL'? I can imagine that 'LOAD_GLOBAL' loads a global, but
seeing as python is such a dynamic language, how exactly is it
supposed to distinguish between them?

I don't understand the following at all: 'DUP_TOP', 'ROT_TWO'. Any
pointers?

What does 'INPLACE_ADD' mean, if not in place addition, and if it is
in place addition, why does it need to 'STORE_ATTR' afterward?

Thanks for any help!

> > --
> > Steven



From eglaser at gmail.com  Wed Mar 14 21:56:22 2007
From: eglaser at gmail.com (eglaser at gmail.com)
Date: 14 Mar 2007 18:56:22 -0700
Subject: spawn process in a new console window
Message-ID: <1173923782.156260.299930@p15g2000hsd.googlegroups.com>

Hello,

I have a script that launches a sequence of other programs, some GUI,
some console.  I'd like the console programs to launch in their own
console window, instead of all of them sharing the script's console.
How do I do that?

I'm on Windows, and currently I'm using os.spawnl(...) to launch the
programs.

Any help is appreciated.

Thanks,

Eli



From gagsl-py2 at yahoo.com.ar  Sun Mar 18 06:26:13 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 Mar 2007 07:26:13 -0300
Subject: Private data
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
Message-ID: <op.tpdq9zstx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 17 Mar 2007 13:31:01 -0300, Dustan <DustanGroups at gmail.com>  
escribi?:

> http://dustangroups.googlepages.com/privateattributesinpython
>
> This is something that I just threw together this morning, after a
> eureka moment. It's a way of creating private class attributes and
> static function variables (I'm not 100% sure if that's the correct
> terminology, but you get what I mean). I haven't tried to create
> private instance attributes, mainly because it would just be too
> difficult, and it would be awful syntax. I'm not considering actually
> using this, but I do have a couple questions about it.

I feel so dumb, but I can't see how to use it, or what's for. Perhaps an  
example?

-- 
Gabriel Genellina



From jeremy+complangpython at jeremysanders.net  Mon Mar 12 14:25:59 2007
From: jeremy+complangpython at jeremysanders.net (Jeremy Sanders)
Date: Mon, 12 Mar 2007 18:25:59 +0000
Subject: Watching a file another app is writing
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
Message-ID: <et45vn$dto$1@gemini.csx.cam.ac.uk>

Gordon Airporte wrote:

> I'm trying to find a way to take a file that another program has opened
> and writes to periodically, open it simultaneously in Python, and
> automatically update some of my objects in Python when the file is
> written to.
> I can open the file and manually readlines() from it to keep up to date,
> it's the automatic part I'm having trouble with. This is on Windows.

It occurs to me under Unix you could perhaps get your first program to write
to a "named pipe", which you 2nd program could read from. See

http://en.wikipedia.org/wiki/Named_pipe

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/


From gregpinero at gmail.com  Fri Mar  9 17:59:44 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 9 Mar 2007 14:59:44 -0800
Subject: How to Start a (thread?) and Leave
In-Reply-To: <mailman.4873.1173477492.32031.python-list@python.org>
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
	<1173472226.698504.147260@h3g2000cwc.googlegroups.com>
	<mailman.4873.1173477492.32031.python-list@python.org>
Message-ID: <1173481183.978618.197560@q40g2000cwq.googlegroups.com>

On Mar 9, 4:57 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> <gregpin... at gmail.com> wrote in message
>
> news:1173472226.698504.147260 at h3g2000cwc.googlegroups.com...

> Can you tell the page to auto-refresh itself every 15 seconds or so?  I
> have seen this as a user but don't know if it is special html code or
> javascript or java or what.
>
> tjr

That's a good point.  I'll check into that.  If not it looks like I'll
be going with os.spawn.



From subscriber123 at gmail.com  Tue Mar  6 23:29:49 2007
From: subscriber123 at gmail.com (Subscriber123)
Date: Tue, 6 Mar 2007 23:29:49 -0500
Subject: is it possible to give an instance a value?
In-Reply-To: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
Message-ID: <4c0048df0703062029j51873680n16fac0f5132be0b0@mail.gmail.com>

In answer to this part of your question, how to make this work:

>>>Person.Address
> 'Sydney'
> >>>Person.Address.type
> '%String'
> >>>Person.Address = 'Canberra'
> >>>print Person.Address. Person.Address.type
> Canberra %String
>

try using the __getattr__ method of the class:

>>> class objWithTypeAttr(object):
...     def __getattr__(self,key):
...         if key is not "type":
...             return self.__dict__[key]
...         else:
...             return type(self.val)
...     def __init__(self,val):
...         self.val=val
...
>>> a=objWithTypeAttr("blah")
>>> a
<__main__.objWithTypeAttr object at 0x00AE0CD0>
>>> a.val
'blah'
>>> a.type
<type 'str'>
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From nagle at animats.com  Thu Mar  8 03:23:32 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 08:23:32 GMT
Subject: merits of Lisp vs Python
In-Reply-To: <YwOHh.4278$B7.2519@bigfe9>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<LWHHh.1355$_a1.157@bignews7.bellsouth.net>
	<jaKHh.1974$uo3.161@newssvr14.news.prodigy.net>
	<7mOHh.3099$h73.2536@newsfe12.lga> <YwOHh.4278$B7.2519@bigfe9>
Message-ID: <8KPHh.5712$M65.2750@newssvr21.news.prodigy.net>

Brian Adkins wrote:
> Ken Tilton wrote:
> 
>> John Nagle wrote:

> Turns out John is having quite a tough time with Python web hosting (the 
> thread has split off to a c.l.p only fork), so I'm going to cut him some 
> slack. Maybe with some lovin' we can woo him over to c.l.l ;)

     Been there, done that.  I've actually used an original refrigerator
sized Symbolics LISP machine.

     I tend to think of Python as a LISP with infix syntax.
We have a better handle on what to put in a dynamic language now, and
Python does a good job in that direction.  I'm happy with the
language; it's the integration with external components that isn't
working.

					John Nagle


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 14 05:23:03 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 10:23:03 +0100
Subject: Iterating across a filtered list
In-Reply-To: <7xslc898oi.fsf@ruckus.brouhaha.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
	<1173812047.578137.223430@j27g2000cwj.googlegroups.com>
	<7xmz2hndh0.fsf@ruckus.brouhaha.com>
	<45f70709$0$5892$426a34cc@news.free.fr>
	<7xslc898oi.fsf@ruckus.brouhaha.com>
Message-ID: <45f7bee1$0$19486$426a74cc@news.free.fr>

Paul Rubin a ?crit :
> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
(snip)
>> Python has had functions as first class objects and
>> (quite-limited-but) anonymous functions, map(), filter() and reduce()
>> as builtin funcs at least since 1.5.2 (quite some years ago).
> 
> True, though no iterators so you couldn't easily use those functions
> on lazily-evaluated streams like you can now.

Obviously. But what I meant is that Python may not be *so* "historically 
imperative" !-)

FWIW, I first learned FP concepts with Python.

>>>  Iterators like that are a new Python feature
>> List comps are not that new (2.0 or 2.1 ?):
>> print "\n".join([contact for name, contact in contacts.items() \
>>                   if search.match(name)])
> 
> Well you could do it that way but it allocates the entire filtered
> list in memory.

Of course. But then nothing prevents you from using a genexp instead of 
the list comp - same final result, and the syntax is quite close:

print "\n".join(contact for name, contact in contacts.items() \
                  if search.match(name))

So the fact that genexps are still a bit "new" is not a problem here 
IMHO - this programming style is not new in Python.

>>> It's usually safest to create and consume them in the same
>>> place, e.g. creating some sequence and passing it through map, filter, etc.
>> Safest ? Why so ?
> 
> Just that things can get confusing if you're consuming the iterator in
> more than one place.

Indeed. But that's not what we have here. And FWIW, in programming, lots 
of things tends to be confusing at first.


From deets at nospam.web.de  Mon Mar 26 08:16:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 26 Mar 2007 14:16:27 +0200
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
Message-ID: <56prsrF2am4a1U1@mid.uni-berlin.de>

Nick Craig-Wood wrote:

> Did anyone write a contextmanager implementing a timeout for
> python2.5?
> 
> I'd love to be able to write something like
> 
>     with timeout(5.0) as exceeded:
>         some_long_running_stuff()
>     if exceeded:
>         print "Oops - took too long!"
> 
> And have it work reliably and in a cross platform way!

Cross platform isn't the issue here - reliability though is. To put it
simple: can't be done that way. You could of course add a timer to the
python bytecode core, that would "jump back" to a stored savepoint or
something like that.

But to make that work reliably, it has to be ensured that no sideeffects
occur while being in some_long_running_stuff. which doesn't only extend to
python itself, but also external modules and systems (file writing, network
communications...). Which can't be done, unless you use a time-machine.
Which I'd take as an personal insult, because in that rolled-back timeframe
I will be possibly proposing to my future wife or something...

Diez


From kyosohma at gmail.com  Tue Mar 27 09:43:26 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 06:43:26 -0700
Subject: Modules & positive surprises
In-Reply-To: <46091c7e$1@griseus.its.uu.se>
References: <46091c7e$1@griseus.its.uu.se>
Message-ID: <1175003006.610471.89860@y80g2000hsf.googlegroups.com>

On Mar 27, 8:30 am, Jan Danielsson <jan.m.daniels... at gmail.com> wrote:
> Hello all,
>
> <IMHO>
>
>    Although I have encountered many modules that have impressed me with
> regards to what they can actually do -- too be perfectly honest, it's
> very rare that I become impressed by the _interfaces_ to the modules.
>
>    Using a new module is normally, with my - admittedly - limited
> experience, a pain. It's not just about reading the reference material,
> and then just use it. You have to figure out how the developer who wrote
> the module was thinking. Often there's a (more or less) natural way to
> do things, and unfortunately that's not how module developers do it.
> It's not a major issue to me personally, since the important part is
> that the module can perform its function.
>
>    But then there are a few modules that I just love to use, because
> they are so "clean" from interface to function. Among them I can't help
> mentioning optparse.
>
>    Yesterday I found another module which I fell in love with: Python
> Cryptography Toolkit (http://www.amk.ca/python/writing/pycrypt/).
>
>    It's just so ... elegant, and functional.
>
> </IMHO>
>
> --
> Kind regards,
> Jan Danielsson

Yeah. I've noticed that myself. There are tons of good modules, but a
lot of the docs are lousy. What's really annoying is that everyone
says that so-and-so is well documented. I love Python, but I wish when
they said some module was well documented, they meant that the docs
were understandable (to n00bs) as well.

Mike



From pyapplico at gmail.com  Fri Mar 30 20:29:53 2007
From: pyapplico at gmail.com (pyapplico at gmail.com)
Date: 30 Mar 2007 17:29:53 -0700
Subject: Remote XML Parsing
In-Reply-To: <euifrk$fv3$1@news2.u-psud.fr>
References: <1175238860.680426.134400@y80g2000hsf.googlegroups.com>
	<euifrk$fv3$1@news2.u-psud.fr>
Message-ID: <1175300992.985589.172320@p77g2000hsh.googlegroups.com>

On Mar 30, 5:56 pm, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> pyappl... at gmail.com a ?crit :
>
> > How can I parse a remote XML file with Python?
> > And what will I be able to do with this XML file in Python?
>
> > Sorry if this is a noob-ish question.
>
> You can process XML data with Python as long as you can get it - you
> will be able to do what you want with it.
>
> How do you access your remote file ?
>
> ...more details would be welcome...

Well I'll be happy to access in the way your comfortable with.



From anil.jupiter9 at gmail.com  Sat Mar 10 09:14:43 2007
From: anil.jupiter9 at gmail.com (jupiter)
Date: 10 Mar 2007 06:14:43 -0800
Subject: Database module & multithreading
Message-ID: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>

Hi guys!!!


Just one quick question... Which database module should I use when I
want to use multi threading as my application requires lots of data
from internet ???? I also want this database module to be fast, simple
n efficient, in any case multi threading capabilities are # 1
requirement.


Thanx Guys

Anil



From mark at mailinator.com  Sat Mar 24 18:59:06 2007
From: mark at mailinator.com (Mark)
Date: 24 Mar 2007 22:59:06 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
Message-ID: <pan.2007.03.24.22.59.05@mailinator.com>

On Sat, 24 Mar 2007 07:21:21 -0700, irstas wrote:
> Also, rstrip doesn't work like you think it does.
> 'pyxyypp.py'.rstrip('.py') == 'pyx'

Well there is embarrassing confirmation that I am a python newbie :(

> I timed it against running plain .py and running .pyc directly. It
> seemed to be roughly on par with running .pyc directly, and about 18ms
> faster than running .py. The file had 600 lines (21kb) of code.

So see my point at least? I'm still not sure why this approach is
ill-favoured?

Thanks very much for all the detailed responses here.


From development-2006-8ecbb5cc8aREMOVETHIS at ANDTHATm-e-leypold.de  Wed Mar 21 09:24:29 2007
From: development-2006-8ecbb5cc8aREMOVETHIS at ANDTHATm-e-leypold.de (Markus E Leypold)
Date: Wed, 21 Mar 2007 14:24:29 +0100
Subject: On Java's Interface (the meaning of interface in computer
	programing)
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
Message-ID: <l9mz26ivaq.fsf@hod.lan.m-e-leypold.de>


Lew <lew at nospam.lewscanon.com> writes:

> Xah Lee wrote:
>> In a functional language, a function can be specified by its name and
>
> Are you sure you know what a "functional language" is?
>
>> parameter specs. For example:
>> f(3)
>> f(3, [9,2])
>> f("some string")
>
> This is not really "typical" syntax for a functional language. LISP,
> for example, has the "function name" as an element of a list. (Some
> might argue that LISP isn't exactly a functional language.)


And nobody really cares, since syntax doesn't make a functional language anyways ...

Regards -- Markus


From gandalf at designaproduct.biz  Thu Mar 22 13:44:31 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 22 Mar 2007 18:44:31 +0100
Subject: ZSI, SOAP and .NET web services - problem
In-Reply-To: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
Message-ID: <4602C07F.4040500@designaproduct.biz>


> I tried to use different library - SOAPpy, but I couldn't. It requires
> fpconst library which cannot be installed because its server does not
> respond at all. What a shit...
>   
I concur! When I tried to use ZSI the first time, it turned out it has 
no support for attachments. Next time I it turned out that it requires 
PyXML, which has no support and cannot be installed for Window + Python 
2.5. Then I needed to use WSSE login, and then I wanted to authenticate 
with x509. Too many problems. SOAP support for Python is bad indeed.

> Why nobody wants to add SOAP to standard Python library? XML-RPC was added
> and it works without any problems

Unfortunately, cursing won't help. It would be the best to join the ZSI 
group - it is where we can help. However, it is an interesting question. 
Ruby has smaller community, how could they implement a standard SOAP lib?

My personal opinion is that SOAP is a piece of shit itself. It is 
hampered from the beginning. If you are interested why, read this:

http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-for-simple/ 


XML-RPC is a fantastic, often undervalued protocol. You can create a 
new, secure XML-RPC server in Python within 5 minutes. You can write a 
client for it within one minue. It is REALLY simple. I'm using it 
continuously.

In contrast, SOAP is overcomplicated and anything but simple. No one 
should create new web services using SOAP. We have enough problems with 
the existing ones. :-(

Despite SOAP is even not a finished standard, big software companies are 
pushing the technology, can someone explain why? Is it because it only 
works correctly with Java and .NET? I guess the reasons are quite 
financial. :-(

  Laszlo





From aleax at mac.com  Tue Mar 20 02:25:40 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 19 Mar 2007 23:25:40 -0700
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<mailman.5284.1174321784.32031.python-list@python.org>
Message-ID: <1hv8wz8.19mj0kb1k9m2m8N%aleax@mac.com>

BJ?rn Lindqvist <bjourne at gmail.com> wrote:
   ...
> even2 = [(pos, col) for pos, col in iterimage(im, width, height, 2)]

list(iterimage(etc etc))

is surely a better way to express identical semantics.  More generally,
[x for x in whatever] (whether x is a single name or gets peculiarly
unpacked and repacked like here) is a good example of inappropriate LC,
to get back to the question in the subject: list(whatever) is the "one
obvious way" to perform the same task.


Alex


From yinglcs at gmail.com  Thu Mar  8 17:23:37 2007
From: yinglcs at gmail.com (ying lcs)
Date: Thu, 8 Mar 2007 16:23:37 -0600
Subject: What is the best way to upgrade python?
In-Reply-To: <2adc542f0703081403m2481de76nd90263a3ce3f84e9@mail.gmail.com>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
	<2adc542f0703081331m478b388qe32150541e6b7243@mail.gmail.com>
	<568e62a40703081355s6038cf08x79dbd934d5ccd1d@mail.gmail.com>
	<2adc542f0703081403m2481de76nd90263a3ce3f84e9@mail.gmail.com>
Message-ID: <568e62a40703081423x3f94772ap78d3343cb590d7df@mail.gmail.com>

On 3/8/07, Sick Monkey <sickcodemonkey at gmail.com> wrote:
> Yeah, sorry I should have added more data.
> You will need to go to rhn.redhat.com and either download the RPM or get the
> url.
>
> So you would do:
> (1) download the rpm to your home directory
> rpm -Uvh nameOfRPM
>
> or
> (2) grab the url
> rpm -Uvh http://urlOfRPM
>
> either way should update your python.   Dont be distressed if you need to
> update or install new RPMs.
>

Thanks. I went to  rhn.redhat.com, but they only have python 2.3.4 for RHEL4.



>
> On 3/8/07, ying lcs <yinglcs at gmail.com> wrote:
> > On 3/8/07, Sick Monkey <sickcodemonkey at gmail.com> wrote:
> > > Have you tried to upgrade the current python RPM?
> > >
> > > rpm -Uvh ....
> > >
> > > You can also build from source.  Once you get Python 2.4 up and running
> I am
> > > pretty sure you can do a symbolic link on the python 2.3 application
> (either
> > > in /usr/bin or /usr/sbin) and point it to the 2.4 python file.
> > >
> >
> >
> > I get '$rpm -Uvh python'
> > error: open of python failed: no such file or directory
> >
> > but when I do '$rpm -q python ' , I get python -2.3.4-14.1
> >
> >
> >
> > > On 8 Mar 2007 13:13:13 -0800, yinglcs at gmail.com <yinglcs at gmail.com >
> wrote:
> > > > Hi,
> > > >
> > > > i am using red hat enterprise 4. It has python 2.3 installed. What is
> > > > the best way to upgrade to python 2.4?
> > > >
> > > > I think one way is to compile python 2.4 from the source, but I can't
> > > > remove the old one since when i do 'rpm -e python', i get error like
> > > > 'failed dependencies'.
> > > >
> > > > Thank you for any idea.
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> > >
> > >
> >
>
>


From roman.yakovenko at gmail.com  Wed Mar 14 05:59:16 2007
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Wed, 14 Mar 2007 11:59:16 +0200
Subject: python/C++ wrapper
In-Reply-To: <1173865112.666847.288360@l75g2000hse.googlegroups.com>
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
	<1173865112.666847.288360@l75g2000hse.googlegroups.com>
Message-ID: <7465b6170703140259k5c059cacsa5297e9ed422e1f7@mail.gmail.com>

On 14 Mar 2007 02:38:32 -0700, Szabolcs Nagy <nszabolcs at gmail.com> wrote:
> > - A c++ program receives a 2D-matrix from python as input and gives a
> > 2D-matrix as output back to python.
>
> pyogre uses swig

Well, pyogre has few problems with maintenance, and new bindings to
Ogre engine was
created using Boost.Python( http://www.ogre3d.org/wiki/index.php/PyOgre )

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/


From antroy at gmail.com  Wed Mar  7 15:41:40 2007
From: antroy at gmail.com (Ant)
Date: 7 Mar 2007 12:41:40 -0800
Subject: Is numeric keys of Python's dictionary automatically sorted?
In-Reply-To: <esn6nu$c8nt$1@netnews.upenn.edu>
References: <esn6nu$c8nt$1@netnews.upenn.edu>
Message-ID: <1173300100.810023.223130@t69g2000cwt.googlegroups.com>

On Mar 7, 8:18 pm, "John" <rds1... at sh163.net> wrote:
...
> However, I am not sure whether it is always like this. Can anybody confirm
> my finding?

>From the standard library docs:

"Keys and values are listed in an arbitrary order which is non-random,
varies across Python implementations, and depends on the dictionary's
history of insertions and deletions."

i.e. the behaviour you have discovered is an implementation detail,
and could change in future versions.



From MonkeeSage at gmail.com  Fri Mar  2 18:20:33 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 15:20:33 -0800
Subject: Sort with extra variables
In-Reply-To: <pan.2007.03.02.23.12.08@gmail.com>
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de>
	<pan.2007.03.02.23.12.08@gmail.com>
Message-ID: <1172877633.676612.141450@31g2000cwt.googlegroups.com>

On Mar 2, 5:11 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> Wouldn't that be just as slow?

Well, I'm not sure about speed, but with the lambda you're creating a
new callable for f every time you call sortMoves. Intuitively, that
seems like it would be more of a hit than just doing a lookup for a
predefined function. Mabye not though...you could time it and see.

Regards,
Jordan



From martinunsal at gmail.com  Tue Mar  6 02:35:00 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 5 Mar 2007 23:35:00 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4689.1173121575.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
Message-ID: <1173166500.640781.252520@t69g2000cwt.googlegroups.com>

On Mar 5, 11:06 am, "Chris Mellon" <arka... at gmail.com> wrote:
> I never advocated big files with many functional units - just files
> that are "just big enough".

Then we're in total agreement. I'm not sure why you thought my
opinions were the result of baggage from other languages when you
don't seem to actually disagree with me.

> Fewer dependencies between compilation units means a
> faster rebuild-test turnaround.

I know all about incremental builds and I just don't think people use
small compilation units in C++ to make their builds faster. It
certainly never been the reason why I subdivided a source file.

> Sure, but whats your goal here? If you're just testing something as
> you work, then this works fine. If you're testing large changes, that
> affect many modules, then you *need* to reload your world, because you
> want to make sure that what you're testing is clean.

I don't think reload works for anything but trivial scripts. The
moment you use "from foo import bar" reload is broken.

> The semantics of exactly what reload should do are tricky. Pythons
> reload works in a sensible but limited way.

I agree that there is some subtlety there, and I appreciate your
example. However the fact that Python's module system essentially
forces you to use "from foo import *" and that reload is almost
entirely imcompatible with "from foo import *", I would say that
reload is essentially useless.

> That said, nothing prevents you from using "from foo import Foo" if
> Foo is all you need (or need most - you can combine this with import
> foo).

Well "from foo import Foo" is just a special case of "from foo import
*". :) It still breaks reload. It still means you're restarting your
interpreter even to do the most trivial development cycle.

> I wonder what environments you worked in before that actually had a
> reliable and gotcha free version of reload?

I'm perfectly well aware that I'm not going to be able to reload a
widget in the middle of a running GUI app, for example. I'm not
looking for gotcha free, I'll settle for minimally useful.

Here's an analogy. In C, you can do an incremental build and run your
modified application without having to first reboot your computer. In
Python, where reload() is essentially the incremental build process,
and the interpreter is essentially a virtual machine, you guys are
saying that my best option is to just "reboot" the virtual machine to
make sure I have a "clean slate". It may be the path of least
resistance, but to say that it is necessary or inevitable is 1960s
mainframe thinking.

Martin



From lojicdotcomNOSPAM at gmail.com  Thu Mar  8 01:47:00 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Thu, 08 Mar 2007 01:47:00 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
Message-ID: <BjOHh.4274$B7.1853@bigfe9>

John Nagle wrote:
> Paul Rubin wrote:
>> Brian Adkins <lojicdotcomNOSPAM at gmail.com> writes:
>>
>>> With prices of dedicated servers and virtual private servers so cheap,
>>> why would anyone get a hosting account without root access? 
>>
>> Because it turns you into a sysadmin instead of letting specialists
>> handle all the OS stuff so you can concentrate on your application.
> 
>    Exactly.  I want to outsource these headaches to someone who's
> doing it for a thousand servers and has a standardized "just works"
> configuration that's Python-friendly.  It's inefficient to work
> through all these issues for a single server.  I have better things
> to do with my time.
> 
>    When starting out with this project, I'd made the assumption that
> Python was a stable, working, well-supported technology, like Perl
> hosting.  It isn't.
> 
>    It's really amazing how stable Perl hosting is.  I have a site,
> "downside.com", that's been running a Perl application since 2000,
> with essentially no attention since 2002.  It's been migrated to new
> servers twice by the hosting provider, without my having had to change
> anything.  Or even do anything.  It's talking to a MySQL database,
> going out and retrieving files from the SEC, parsing complex documents,
> gettting a feed from NASDAQ, responding to queries, and doing
> quite a bit of work.  When developing that, I had no serious problems 
> with Perl.

This may sound like I'm baiting you, but it's a sincere question. If 
your experience with Perl was so good, why did you decide to pursue 
Python? Trouble free hosting and no problems in development - sounds 
like it worked out well for you.

I do think that "hosting for the masses" is geared toward PHP, Perl, 
.NET, etc.

I primarily develop in Ruby on Rails (I'm here 'cause the original 
thread was posted to c.l.p and c.l.l) and I admit that trying that in a 
shared hosting environment will probably lead to frustration, but once I 
bit the bullet and got a VPS, and later a dedicated server, it was 
smooth sailing, and the performance is *so* much better.

A bit of a learning curve getting Apache, Mongrel, MySQL, etc. up and 
running (which was a fixed amount of time), then it just runs. In my 
case, the productivity gains over my previous environment 
(Java/Spring/Hibernate) was enough to justify a little pain for long 
term gains. Switching from the VPS to the dedicated server with a 
different company was easy because I already had the recipe to get a 
server setup.

> 
>    Python, on the other hand, is uphill all the way.  Constant trouble
> with version issues, especially with C components called from Python.
> MySQLdb, M2Crypto, SSL - they all have platform/version
> incompatibility problems.  I just spent three days making M2Crypto
> work on a new Linux server with a different Red Hat version.
> Neither Python's packaging tools nor the platform's packaging
> tools deal adequately with these issues.

Now I understand your original post a bit better. Sounds like you've had 
a fair amount of frustration.

>    The language is fine.  It's those weakly-supported packages out
> there in the cold that are the problem.  (I definitely agree with
> Guido that SWIG is a bad idea.  I've been combing through the 24,000
> lines of C generated by SWIG for M2Crypto, figuring out the compile
> errors and what caused them.  This is neither fun nor desirable.)
> 
>    I get the feeling that Python isn't used much for general web hosting
> any more.  Only about two messages per month on this newsgroup mention
> a hosting-related issue.

It could be that the web folks are concentrated elsewhere - maybe a 
TurboGears or Django forum? Are you just using Python with CGI, or with 
a web framework? If the latter, I expect the framework folks could be 
quite helpful.

> 
>    One wonders how many people try and give up.
> 
>                 John Nagle


From MonkeeSage at gmail.com  Sun Mar  4 14:58:27 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 4 Mar 2007 11:58:27 -0800
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
	<IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
Message-ID: <1173038307.594909.292330@s48g2000cws.googlegroups.com>

On Mar 4, 12:03 pm, John Nagle <n... at animats.com> wrote:
>     Exactly.  As I've pointed out before, Python doesn't play well with
> others.  The Python developers pass the buck to the Linux packager, the
> Linux packager passes the buck to the Python developers, and thus
> the user experience sucks.

The configure script checks for libraries and headers that are
required for a base build, and (according to the options passed to
configure, or using the defaults) optional components. There is NO WAY
for it to know which PACKAGES, on any of the 500 linux distributions,
provide those libs and headers. That is the job of the PACKAGER, or
(gasp) the end user if you use a distro without a package system or
trying to build from raw source. There is no passing the buck. If a
package is broken, the packager must fix it. If the source is broken,
the developer must fix it.

>     Debian seems to have struggled through this problem, but Red Hat
> apparently just decided to give up keeping up with Python versions.

Anybody can make packages, not just the distro maintainers. Why not
search for them?

http://rpmseek.com/rpm-pl/python.html?hl=com&cs=python%3APN%3A0%3A0%3A0%3A0%3A0&qArStr=0&qRtStr=1&qDnStr=82



From NikitaTheSpider at gmail.com  Sun Mar  4 21:48:57 2007
From: NikitaTheSpider at gmail.com (Nikita the Spider)
Date: Sun, 04 Mar 2007 21:48:57 -0500
Subject: Platform-specific compile flags in setup.py?
Message-ID: <NikitaTheSpider-0C9F38.21485704032007@news-server.nc.rr.com>

Hi all,
I'm a newbie when it comes to distributing C-based Python modules. I'm 
just now sharing my first with the rest of the world (it's actually V. 
Marangozov's shared memory module for IPC) and I've learned that the 
module needs a different set of compile flags for Linux than for my Mac. 
My question is this: is there a convention or standard that says where 
platform-specific compile flags should reside? I could put them in 
setup.py, OTOH I know that within the .C file I can add something like 
this:
#ifdef __FreeBSD__
#include <machine/param.h>  /* for system definition of PAGE_SIZE */
#endif

That works, but for maximum Python programmer-friendliness I should 
perhaps put the complexity in setup.py rather than in a .C file.

Opinions appreciated.

PS - The module in question is here; Linux users must remove the tuple 
"('HAVE_UNION_SEMUN', None)" from setup.py:
http://NikitaTheSpider.com/python/shm/

-- 
Philip
http://NikitaTheSpider.com/
Whole-site HTML validation, link checking and more


From richard at commonground.com.au  Mon Mar  5 11:12:56 2007
From: richard at commonground.com.au (Richard Jones)
Date: Mon, 05 Mar 2007 16:12:56 -0000
Subject: Roundup Issue Tracker release 1.3.3
Message-ID: <1901474C-A5E3-4AEC-BEAE-97D6FC33CE5A@commonground.com.au>

I'm proud to release version 1.3.3 of Roundup.

Fixed in 1.3.3:

- If-Modified-Since handling was broken
- Updated documentation for customising hard-coded searches in page.html
- Updated Windows installation docs (thanks Bo Berglund)
- Handle rounding of seconds generating invalid date values
- Handle 8-bit untranslateable messages from database properties
- Fix scripts/roundup-reminder date calculation (sf bug 1649979)
- Improved due_date and timelog customisation docs (sf bug 1625124)

New Features in 1.3.0:

- WSGI support via roundup.cgi.wsgi_handler

If you're upgrading from an older version of Roundup you *must* follow
the "Software Upgrade" guidelines given in the maintenance  
documentation.

Roundup requires python 2.3 or later for correct operation.

To give Roundup a try, just download (see below), unpack and run::

     roundup-demo

Release info and download page:
      http://cheeseshop.python.org/pypi/roundup
Source and documentation is available at the website:
      http://roundup.sourceforge.net/
Mailing lists - the place to ask questions:
      http://sourceforge.net/mail/?group_id=31577


About Roundup
=============

Roundup is a simple-to-use and -install issue-tracking system with
command-line, web and e-mail interfaces. It is based on the winning  
design
from Ka-Ping Yee in the Software Carpentry "Track" design competition.

Note: Ping is not responsible for this project. The contact for this
project is richard at users.sourceforge.net.

Roundup manages a number of issues (with flexible properties such as
"description", "priority", and so on) and provides the ability to:

(a) submit new issues,
(b) find and edit existing issues, and
(c) discuss issues with other participants.

The system will facilitate communication among the participants by  
managing
discussions and notifying interested parties when issues are edited.  
One of
the major design goals for Roundup that it be simple to get going.  
Roundup
is therefore usable "out of the box" with any python 2.3+  
installation. It
doesn't even need to be "installed" to be operational, though a
disutils-based install script is provided.

It comes with two issue tracker templates (a classic bug/feature  
tracker and
a minimal skeleton) and five database back-ends (anydbm, sqlite,  
metakit,
mysql and postgresql).


-- 
http://mail.python.org/mailman/listinfo/python-announce-list

        Support the Python Software Foundation:
        http://www.python.org/psf/donations.html









From paul at boddie.org.uk  Fri Mar 23 07:26:51 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 23 Mar 2007 04:26:51 -0700
Subject: Been a while...
In-Reply-To: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
Message-ID: <1174649211.198017.86780@l75g2000hse.googlegroups.com>

On 22 Mar, 16:34, John Salerno <johnj... at NOSPAMgmail.com> wrote:
> Hi guys. It's been a while since I've used Python, so I got a little
> rusty, but I really want to start using it again, just out of habit and
> for fun. Can anyone suggest a book or a website with little projects I
> could work on to keep me busy?

The Python Wiki's Beginner's Guide is one place to start:

http://wiki.python.org/moin/BeginnersGuide

> (I do have Beginning Python with the 10 projects in the back, but those
> might be a little too involved for me right now.)

There are many ideas for projects on the Wiki, too:

http://wiki.python.org/moin/CodingProjectIdeas

I think a lot of them might be quite difficult for beginners, however.

Paul



From rw at smsnet.pl  Sat Mar 24 09:57:44 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: Sat, 24 Mar 2007 14:57:44 +0100
Subject: Create new processes over telnet in XP
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
	<1174658259.620897.171480@o5g2000hsb.googlegroups.com>
	<1174697231.075546.317470@l75g2000hse.googlegroups.com>
Message-ID: <87odmihhgn.fsf@smsnet.pl>

"Godzilla" <godzillaismad at gmail.com> writes:

> Rob, I would be logging into another XP machine to do some software

I was afraid of that. :)

> installation... the code you provided, correct me if I'm wrong, seems
> to work under Unix/Linux. 

This part of running and killing processes, yes.

> Any idea how to do the equivalent in XP?

You could use windows services, for example:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/115875

But I don't know details, because this is not my favourite OS. :)

-- 
Regards,
Rob


From tew24 at spam.ac.uk  Wed Mar 21 11:32:17 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 15:32:17 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
Message-ID: <etrj61$euc$1@gemini.csx.cam.ac.uk>

skip at pobox.com wrote:
>     Tom> ...and then I allocate a lot of memory in another process (eg.
>     open Tom> a load of files in the GIMP), then the computer swaps the
>     Python
>     Tom> process out to disk to free up the necessary space.  Python's
>     Tom> memory use is still reported as 953 MB, even though nothing like
>     Tom> that amount of space is needed.  From what you said above, the
>     Tom> problem is in the underlying C libraries, but is there anything I
>     Tom> can do to get that memory back without closing Python?
> 
> Not really.  I suspect the unused pages of your Python process are paged
> out, but that Python has just what it needs to keep going.

Yes, that's what's happening.

> Memory contention would be a problem if your Python process wanted to keep
> that memory active at the same time as you were running GIMP.

True, but why does Python hang on to the memory at all?  As I understand it,
it's keeping a big lump of memory on the int free list in order to make
future allocations of large numbers of integers faster.  If that memory is
about to be paged out, then surely future allocations of integers will be
*slower*, as the system will have to:

1) page out something to make room for the new integers
2) page in the relevant chunk of the int free list
3) zero all of this memory and do any other formatting required by Python

If Python freed (most of) the memory when it had finished with it, then all
the system would have to do is:

1) page out something to make room for the new integers
2) zero all of this memory and do any other formatting required by Python

Surely Python should free the memory if it's not been used for a certain
amount of time (say a few seconds), as allocation times are not going to be
the limiting factor if it's gone unused for that long.  Alternatively, it
could mark the memory as some sort of cache, so that if it needed to be
paged out, it would instead be de-allocated (thus saving the time taken to
page it back in again when it's next needed)


> I think the process's resident size is more important here than virtual
> memory size (as long as you don't exhaust swap space). 

True in theory, but the computer does tend to go rather sluggish when paging
large amounts out to disk and back.  Surely the use of virtual memory
should be avoided where possible, as it is so slow?  This is especially
true when the contents of the blocks paged out to disk will never be read
again.


I've also tested similar situations on Python under Windows XP, and it shows
the same behaviour, so I think this is a Python and/or GCC/libc issue,
rather than an OS issue (assuming Python for linux and Python for windows
are both compiled with GCC).

-- 
I'm at CAMbridge, not SPAMbridge


From bj_666 at gmx.net  Wed Mar  7 15:30:52 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 07 Mar 2007 21:30:52 +0100
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173295587.143018.102220@p10g2000cwp.googlegroups.com>
Message-ID: <pan.2007.03.07.20.30.51.24943@gmx.net>

In <1173295587.143018.102220 at p10g2000cwp.googlegroups.com>, Miki wrote:

> Exceptions are for error handling, not flow control.

That's not true, they are *exceptions* not *errors*.  They are meant to
signal exceptional situations.  And at least under the cover it's used in
every ``for``-loop because the end condition is signaled by a
`StopIteration` exception.  Looks like flow control to me.

Ciao,
	Marc 'BlackJack' Rintsch


From jeff at jmcneil.net  Tue Mar  6 09:22:12 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Tue, 6 Mar 2007 09:22:12 -0500
Subject: Any module to parse httpd.conf?
In-Reply-To: <1173175413.679940.310750@p10g2000cwp.googlegroups.com>
References: <1173175413.679940.310750@p10g2000cwp.googlegroups.com>
Message-ID: <82d28c40703060622o32f2ec24q51fa7b7fb9a70971@mail.gmail.com>

I looked at http://www.python.org/pypi/httpdrun not so long ago, it might be
able to do what you want. I think it was a bit hard to read.  Remember that
with Apache you (may) also need to worry about configuration merges and
whatnot (<Directory>, <VirtualHost>, .htaccess, and so on...).

What specifically do you want to do? There are a lot of ways to do a lot of
things with Apache.  If you're looking to create virtual hosts, take a look
at mod_vhost_alias or some RewriteRule magic.  You're configuration could be
pretty simplified and reduced to updating a gdbm file or creating a
directory?

Jeff

On 6 Mar 2007 02:03:33 -0800, Gerard Flanagan <grflanagan at yahoo.co.uk>
wrote:
>
> Hello,
>
> Does anyone know of an existing module to parse httpd.conf files?
>
> Thanks.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070306/80a462a1/attachment.html>

From khemkaamit at gmail.com  Wed Mar 28 04:00:09 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Wed, 28 Mar 2007 13:30:09 +0530
Subject: XML Parsing
In-Reply-To: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
Message-ID: <1360b7230703280100r1f55061eued0b1903bc3facb0@mail.gmail.com>

On 28 Mar 2007 00:38:38 -0700, pyapplico at gmail.com <pyapplico at gmail.com> wrote:
> I want to parse this XML file:
>
> <?xml version="1.0" ?>
>
> <text>
>
> <text:one>
> <file>filename</file>
> <contents>
> Hello
> </contents>
> </text:one>
>
> <text:two>
> <file>filename2</file>
> <contents>
> Hello2
> </contents>
> </text:two>
>
> </text>
>
> This XML will be in a file called filecreate.xml
>
> As you might have guessed, I want to create files from this XML file
> contents, so how can I do this?
> What modules should I use? What options do I have? Where can I find
> tutorials? Will I be able to put
> this on the internet (on a googlepages server)?

http://effbot.org/zone/celementtree.htm


HTH,
-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From http  Sat Mar  3 15:49:37 2007
From: http (Paul Rubin)
Date: 03 Mar 2007 12:49:37 -0800
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
Message-ID: <7xd53qxdb2.fsf@ruckus.brouhaha.com>

Nicholas Parsons <parsons.nicholas1 at gmail.com> writes:
> I was just playing around in IDLE at the interactive prompt and typed
> in dir({}) for the fun of it.  I was quite surprised to see a pop
> method defined there.  I mean is that a misnomer or what?  From the
> literature, pop is supposed to be an operation defined for a stack
> data structure.  A stack is defined to be an "ordered" list data
> structure.  Dictionaries in Python have no order but are sequences.
> Now, does anyone know why the python core has this pop method
> implemented for a dictionary type?

Try typing: 

  help({}.pop)


From mtobis at gmail.com  Fri Mar 30 17:24:47 2007
From: mtobis at gmail.com (Michael Tobis)
Date: 30 Mar 2007 14:24:47 -0700
Subject: New to Python - Easy way to open a text file
In-Reply-To: <iYCdnXKeYrYe9pDbnZ2dnUVZ_rWnnZ2d@giganews.com>
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
	<1175270675.296617.83380@e65g2000hsc.googlegroups.com>
	<pan.2007.03.30.16.39.12.89800@gmx.net>
	<1175282893.015117.154310@l77g2000hsb.googlegroups.com>
	<iYCdnXKeYrYe9pDbnZ2dnUVZ_rWnnZ2d@giganews.com>
Message-ID: <1175289887.510619.166280@e65g2000hsc.googlegroups.com>

I think it's pretty clear that we aren't understanding what you mean
by "open a text file and disply its content".

I conclude that by "edna" you mean this thing: http://edna.sourceforge.net/

I suspect you are not asking a Python question at all.

Did you try opening

file:///<path-to-edna>/edna-0.6/templates/default.ezt

in your browser? This will show you the design of your (unpopulated)
template rendered in your browser.

Notes:

1) yes you do need three slashes after "file:" for some reason I've
never comprehended
2) you will need to replace <path to browser> with your local system
path to the edna directory. (In firefox you can, alternatively, browse
to the file from File->open; Safari will balk at the ezt extension; I
don't know what other browsers will do.)

If this is more like what your are after, consider that your question
was misleading (and entirely unrelated to Python). The edna miling
list is here:
http://www.lyra.org/mailman/listinfo/edna

hth
mt



From chriscorbell at gmail.com  Mon Mar  5 16:04:54 2007
From: chriscorbell at gmail.com (Christopher Corbell)
Date: 5 Mar 2007 13:04:54 -0800
Subject: Any way to determine test success from inside tearDown()?
Message-ID: <1173128693.022759.134280@t69g2000cwt.googlegroups.com>

This question pertains to PyUnit, esp. unittest.TestCase subclasses.

Does anyone know of a way from within the TestCase tearDown() method
to determine whether the current test succeeded or not?

What I'm after is a specialized clean-up approach for error/failure
cases.

This is somewhat related to some earlier threads in this group about
using fixtures across test invocations.  I'm functionally testing a
system that uses a database.  Successful tests are guaranteed to
restore the system's data fixtures to initial state, but when tests
fail or error-out we want to do a brute-force re-initialization of the
server so downstream tests can continue.  This re-initialization takes
time so we don't want to do it in every tearDown(), just on error/
failure tearDown()'s.

TIA,
Chris



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 06:24:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 08:24:37 -0300
Subject: Pb with __del__ and inheritence
References: <esm4gq$432$1@ellebore.extra.cea.fr>
Message-ID: <op.totgnbpux6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 07:35:05 -0300, Erwan Adam <erwan.adam at cea.fr>  
escribi?:

> Can someone reproduce this bug ... I use :
Same on 2.5 Windows.

> class XObject(object):
>
>      def __del__(self):
>          print "XObject.__del__"
>          return
>
>      pass
>
> class A(XObject):
>
>      def __del__(self):
>          print "A.__del__"
>          XObject.__del__(self)
>          return
>
>      pass
>
> aaa = A()
> ------
> A.__del__
> Exception exceptions.AttributeError: "'NoneType' object has no attribute
> '__del__'" in <bound method A.__del__ of <__main__.A object at
> 0xb7bb124c>> ignored

Print XObject inside A.__del__ and you can see that it is None. That means  
that the XObject reference was set to None *before* aaa was deleted.  
Values inside the module namespace are set to None when it's destroyed (to  
break possible reference cycles, I presume). I can't find any place in the  
docs that guarantees any ordering on the object deletion, so I don't  
consider this a "bug". See the big notes on the __del__ method docs.

If you *really* must do some cleanup on A.__del__, you can't trust on  
*any* globals, and you must store a reference to anything needed inside  
__del__

-- 
Gabriel Genellina



From f.braennstroem at gmx.de  Wed Mar 28 15:52:10 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Wed, 28 Mar 2007 19:52:10 +0000
Subject: pattern search
In-Reply-To: <op.tpvbtmuzx6zn5v@gabriel2.softlabbsas.com.ar>
References: <mailman.5671.1175008459.32031.python-list@python.org>	<56sqtbF29auttU2@mid.uni-berlin.de>	<1175018282.059201.3200@d57g2000hsg.googlegroups.com>	<56the2F28t97kU1@mid.uni-berlin.de>
	<op.tpvbtmuzx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <eue9q9$f95$1@sea.gmane.org>

Hi,

Gabriel Genellina schrieb am 03/27/2007 10:09 PM:
> En Tue, 27 Mar 2007 18:42:15 -0300, Diez B. Roggisch <deets at nospam.web.de>  
> escribi?:
> 
>> Paul McGuire schrieb:
>>> On Mar 27, 10:18 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
>>>> Fabian Braennstroem wrote:
>>>>>                 while iter:
>>>>>                     value = model.get_value(iter, 1)
>>>>>                     if value.endswith("."+ pattern): [...]
>>>>>
>>>>> Now, I would like to improve it by searching for different 'real'
>>>>> patterns just like using 'ls' in bash. E.g. the entry
>>>>> 'car*.pdf' should select all pdf files with a beginning 'car'.
>>>>> Does anyone have an idea, how to do it?
> 
>>>> Use regular expressions. They are part of the module "re". And if you  
>>>> use them, ditch your code above, and make it just search for a pattern  
>>>> all the time. Because the above is just the case of
>>>> *.ext
> 
>>> The glob module is a more direct tool based on the OP's example.  The
>>> example he gives works directly with glob.  To use re, you'd have to
>>> convert to something like "car.*\.pdf", yes?
> 
>> I'm aware of the glob-module. But it only works on files. I was under
>> the impression that he already has a list of files he wants to filter
>> instead of getting it fresh from the filesystem.
> 
> In that case the best way would be to use the fnmatch module - it already  
> knows how to translate from car*.pdf into the right regexp. (The glob  
> module is like a combo os.listdir+fnmatch.filter)

I have a already a list, but I 'glob' looked so easy ... maybe it is
 faster to use fnmatch. When I have time I try it out...

Thanks!
Fabian



From adamgarstang at googlemail.com  Sun Mar  4 08:40:28 2007
From: adamgarstang at googlemail.com (Adam)
Date: 4 Mar 2007 05:40:28 -0800
Subject: Where I could find older python releases ?
In-Reply-To: <mailman.4645.1173002306.32031.python-list@python.org>
References: <mailman.4645.1173002306.32031.python-list@python.org>
Message-ID: <1173015628.337511.61270@s48g2000cws.googlegroups.com>

On Mar 4, 9:52 am, 13 <one.th... at gmail.com> wrote:
> Hello list,
>
> I have been searching the internet for python version 0.9.0 sources
> which had been posted to alt.sources list, but without any luck. Maybe
> someone has it available somewhere ?
>
> Thanks,
> Martins

http://www.python.org/download/



From gagsl-py2 at yahoo.com.ar  Fri Mar 23 04:48:39 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 05:48:39 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
	<mailman.5496.1174624444.32031.python-list@python.org>
	<1174625242.761663.235320@e1g2000hsg.googlegroups.com>
Message-ID: <op.tpmv3drax6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 01:47:22 -0300, John Pye <john.pye at gmail.com> escribi?:

> On Mar 23, 3:33 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> import msvcrt
>> fh = msvcrt.get_osfhandle(f.fileno())
> ..
>> example.filetest(fh)
>> f.close()
>
> Cool, that looks great, Gabriel.
>
> But is there any way I can hide the get_osfhandle call inside my
> Python module? That way I wouldn't need to request end users to make
> contorted 'if platform.system()=="Windows"' calls everywhere.
>
> Maybe this *is* workable, after all :-)

I can think of two ways:

- Define a Python function to do that, and test the platform just there.  
Something like that:

def exportable_file(f):
   if we_are_working_on_windows:
     import msvcrt
     return msvcrt.get_osfhandle(f.fileno())
   else:
     return f

And replace all places where a Python file goes into a C extension, with  
exportable_file(f)

- Define your own file class, inheriting from file, and store that handle  
as an attribute

class my_file_class(file):
   def __init__(self, name, mode="r", buffering=-1):
     file.__init__(self, name, mode, buffering)
     self.handle = msvcrt.get_osfhandle(self.fileno())

But I've not checked this; I'm not sure if file creation always goes thru  
this __init__; I assume the file will never change its FILE struct (f_fp  
member) (uhm, is there any way to re-open a file?). Perhaps this approach  
has many assumptions to be usable at all - uh, forget it.


-- 
Gabriel Genellina



From robin at NOSPAMreportlab.com  Fri Mar 16 18:02:23 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Fri, 16 Mar 2007 22:02:23 +0000
Subject: mySQLdb versus platform problem
In-Reply-To: <BhCKh.15696$bb1.10074@newssvr17.news.prodigy.net>
References: <mailman.5184.1174060768.32031.python-list@python.org>
	<BhCKh.15696$bb1.10074@newssvr17.news.prodigy.net>
Message-ID: <45FB13EF.2050706@jessikat.plus.net>

John Nagle wrote:
> Try:
> 
>     db=MySQLdb.connect(host='appx',db='sc_0',user='user',passwd='secret',
>     use_unicode=True, charset = "utf8")
> 
> The distinction is that "use_unicode" tells Python to convert to Unicode,
> but Python doesn't know the MySQL table type.  'charset="utf8"' tells
> MySQL to do the conversion to UTF8, which can be reliably converted
> to Unicode.
> 
>                     John Nagle
> 
>.......

OK that seems to help. However, my database has tables with different 
encodings. Does MySQLdb ignore the table encoding? That would be a bit lame.

Also it still doesn't  explain the different behaviours between unix & 
win32 (or perhaps different defaults are somehow magically decided upon).
-things were so much easier when bytes were bytes-ly yrs-
Robin Becker


From psdasilvaX at esotericaX.ptX  Fri Mar 16 21:05:05 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 17 Mar 2007 01:05:05 +0000
Subject: Returning other instance from __init__ - I need help
In-Reply-To: <1174076229.671240@jubilee.claranet.pt>
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
	<1173970438.864747@jubilee.claranet.pt>
	<1174076229.671240@jubilee.claranet.pt>
Message-ID: <1174093476.6937@jubilee.claranet.pt>

Paulo da Silva escreveu:
> Paulo da Silva escreveu:
>> Alex Martelli escreveu:
>>> Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:
>> ....
>>
>>> E.g.:
>>>
>>> class C1(object):
>>>     def __new__(cls, xxx):
>>>         if xxx: return type.__new__(cls, xxx)
>>>         else: return C1.load(xxx)
>>>     @staticmethod
>>>      def load(xxx): return ...whatever...
>>>      def __init__(self, xxx):
>>>          if hasattr(self, 'foo'): return
>>>          self.foo = 'foo'
>>>          self.bar = 'bar'
>>>
>>
>> Just for a better understanding ...
>> Can I do this?
>>
>> class C1(object):
>>     def __new__(cls, xxx):
>>         if xxx:
>> 		cls.foo='foo'
>> 		cls.bar='bar'
>> 		return type.__new__(cls, xxx)
> This does not work(!) at least for python 2.4.3.
> 
>>         else:
>> 		return C1.load(xxx)
>>     @staticmethod
>>     def load(xxx): return ...whatever...
>>     # OMMIT THE __init__
>>     # or
>>     def __init__(self, xxx):
>>         pass
> 
> I needed return cls and put the __init__ stuff here.
> Is this the best practice?
> 

When debugging, I found this is wrong!!!
Would someone please clarify what do I have to return from
__new__?

Thank you very much.




From domma at procoders.net  Wed Mar 28 16:17:49 2007
From: domma at procoders.net (Achim Domma)
Date: Wed, 28 Mar 2007 22:17:49 +0200
Subject: SimpleXMLRPCServer and Threading
Message-ID: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>

Hi,

is SimpleXMLRPCServer multithreaded or how does it handle multiple 
clients? I want to implement a simple server which will be queried by 
multiple processes for work to be done. The server will simply hold a 
queue with files to process. The clients will ask for the next file.

Do I have to sync access to the queue or is the server not threaded at all?

regards,
Achim


From kyosohma at gmail.com  Mon Mar 19 15:35:21 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 12:35:21 -0700
Subject: Writing files
In-Reply-To: <goBLh.129192$_73.83550@newsread2.news.pas.earthlink.net>
References: <goBLh.129192$_73.83550@newsread2.news.pas.earthlink.net>
Message-ID: <1174332921.714624.72720@n76g2000hsh.googlegroups.com>

On Mar 19, 2:20 pm, Adonis Vargas <ado... at REMOVETHISearthlink.net>
wrote:
> I am writing a program that walks a directory full of mp3s reads their
> ID3 data (using Mutagen), this part works perfectly. The problem is I
> write these tags to a CSV file through the CSV module. But when I read
> the file the file seems to be incomplete. Further inspecting it has
> seemed to have stopped writing to the file at a certain point. Something
> in my code? a bug?
>
> System: Linux 2.4.31 (Slackware), Python 2.5c1
>
> Any help is greatly appreciated.
>
> Adonis
>
> -- code --
>
>      def _scan(self):
>          outFile = file("mp3.dat", "wb")
>          outCSV = csv.writer(outFile)
>          output = list()
>          for root, dirs, files in os.walk(self.directory):
>              files = [x for x in files if x.endswith(".mp3")]
>              for aFile in sorted(files):
>                  mp3Data = MP3(os.path.join(root, aFile))
>                  title = mp3Data.get("TIT2")
>                  output.append([root, aFile, title])
>              outCSV.writerows(output)
>              output = list()

Are you closing the file before you try to read it? Other than that,
I'm drawing a blank with just this sample to work with. Maybe someone
else will know...or you could post more code?

Mike



From inq1ltd at verizon.net  Wed Mar  7 11:54:05 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 07 Mar 2007 11:54:05 -0500
Subject: askstring Window to the top under Windows
In-Reply-To: <20070307100257.200740@gmx.net>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<200703062049.42488.inq1ltd@verizon.net>
	<20070307100257.200740@gmx.net>
Message-ID: <200703071154.05945.inq1ltd@verizon.net>

On Wednesday 07 March 2007 05:02, Ingo Wolf wrote:
> -------- Original-Nachricht --------
> Datum: Tue, 06 Mar 2007 20:49:42 -0500
> Von: jim-on-linux <inq1ltd at verizon.net>
> An: python-list at python.org
> CC: "iwl" <Ingo.Wolf at gmx.de>
> Betreff: Re: askstring Window to the top under
> Windows
>
> > By default
> > tk will open a root window.
> > so you will have to create
> > something to put into the
> > root window.
> > I suggest a button to open the tkSimpleDialog
> > box.
> >
> > go to;
> >
> > http://www.pythonware.com/library/tkinter/int
> >roduction/
>
> I've allready had a short look trough this to
> find an idea how to change this behavior (which
> should be done by the askstring makers) but
> haven't up to now. I think what I do is what
> askstring was made for keeping me away from tk
> internals only wanting a little string input.
>
> Because I have embedded python In my C-App I
> make my own window now In C and extend python
> by it so having more control about things
> happen.


Check out how to use Entry Wiget
for data entry.

====

from Tkinter import *

root = Tk()  ## this is the default window
vlab = Label(root,   width = 20, 
                  text = 'Enter data here')
vlab.grid( row=0, column =0)

ventry= Entry(root, width = 30)
ventry.grid(row = 0, column = 1)
mainloop()

jim-on-linux
http:\\www.inqvista.com









From inq1ltd at verizon.net  Fri Mar  9 13:14:48 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 09 Mar 2007 13:14:48 -0500
Subject: SQLite3 trapping OperationalError
In-Reply-To: <op.tow2n71ux6zn5v@gabriel2.softlabbsas.com.ar>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<op.tow2n71ux6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <200703091314.49199.inq1ltd@verizon.net>

pyhelp,

I set up a table in SQLite3.

While running other modules I want to know if a  
table exists.

SQL has a command "List Tables" but I don't think 
SQLlite3 has this command.

I've tried 
   cursor.execute("select * from debtor where key
    is not null ")

The table debtor does not exist so I get 
"OperationalError"
which I want to trap with try/except or some other 
way.

However python 2.5, 
except OperationalError: 
responds with 
"OperationalError" is not defined.

Ideas on how to determine if a table exists would 
be welcome.

jim-on-linux




From nagle at animats.com  Thu Mar  8 20:32:00 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 09 Mar 2007 01:32:00 GMT
Subject: merits of Lisp vs Python
In-Reply-To: <7xabynh9af.fsf@ruckus.brouhaha.com>
References: <1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<RxPHh.10406$tD2.5273@newsread1.news.pas.earthlink.net>
	<mailman.4809.1173377788.32031.python-list@python.org>
	<7xabynh9af.fsf@ruckus.brouhaha.com>
Message-ID: <kO2Ih.1307$yW.914@newssvr11.news.prodigy.net>

Paul Rubin wrote:
> "Chris Mellon" <arkanes at gmail.com> writes:
> 
>>Any *real* hosting provider is going to support whatever
>>language and environment I tell them to, because I'm going to pay them
>>a lot of money for excellent support and if they give me any trouble I
>>will go with someone who provides what I want.

    Who are you buying from?

> Hosting providers are generally not in the business of doing anything
> like that, except the low end ones that mostly support PHP.  
> 
> 
>>What was *meant* was low priced, zero maintenance, reasonably reliable
>>consumer level hosting. Thats a totally different market, it's not
>>"industrial strength", and it doesn't merit the emphasis on *real*
>>provider. And it is true that in that realm Python is not well
>>represented.
> 
> 
> Python is not so well represented in "industrial strength" hosting
> either; that kind of hosting generally leaves language support up to
> the customer.

     The industry trend seems to be towards two dedicated server offerings.
One is dedicated hosting in a relatively controlled manner, with web based
server control and a somewhat locked down environment.  You get
root access, but if you mess with the controlled environment, it's
your problem if anything breaks.  The Plesk control panel is widely
used for this.

     The other offering is "power, pipe, and ping" - an empty machine in
a rack.  What you do with it is your problem.

     In neither case is the Python environment typically ready for serious use
out of the box.

     There's denial in the Python community that this is a problem, but it is.
The Ruby on Rails people get it; they work to provide a seamless experience
for web developers.  Which is why their market share is way up over two years
ago.

     Here's an overview of the dedicated server industry from the Gartner
Group:

http://www.savvis.net/NR/rdonlyres/E2C3E79F-8F8D-46D0-9718-E26C76805D0F/13782/SAVVISPositionedasLeaderinGartnerNAHostingMQGARTNE.pdf

     There's an emphasis on standardized offerings from the major players.
Customized environments are usually either user-managed or offered
as part of enterprise IT outsourcing.

				John Nagle


From codecraig at gmail.com  Mon Mar 19 14:42:44 2007
From: codecraig at gmail.com (abcd)
Date: 19 Mar 2007 11:42:44 -0700
Subject: Load three different modules which have the same name
In-Reply-To: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
Message-ID: <1174329764.310542.298430@b75g2000hsg.googlegroups.com>

nevermind this took care of it:

import sys

def tryAllThree():
    a = "c:\\alpha"
    b = "c:\\beta"
    g = "c:\\gamma"

    sys.path.append(a)
    import Person
    alpha = Person.Person()

    sys.path.remove(a)
    sys.path.append(b)
    reload(Person)
    beta = Person.Person()

    sys.path.remove(b)
    sys.path.append(g)
    reload(Person)
    gamma = Person.Person()

thanks



From claird at lairds.us  Fri Mar 30 07:35:33 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 30 Mar 2007 11:35:33 +0000
Subject: Memory testing in Python
References: <1175242912.103313.99110@n59g2000hsh.googlegroups.com>
Message-ID: <599vd4-1rg.ln1@lairds.us>

In article <1175242912.103313.99110 at n59g2000hsh.googlegroups.com>,
 <csselo at gmail.com> wrote:
>Hi all
>
>I want to test my python code for memory efficiency in gnu/linux.How
>can I do this?
			.
			.
			.
What does "memory efficiency" mean to you?  Are you asking
how to eliminate memory leaks?

While I have a great deal of interest in memory management,
my general reaction to your question as you've posed it is,
"Don't; concentrate for now on good Python style."


From paul at boddie.org.uk  Thu Mar 15 07:36:29 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Mar 2007 04:36:29 -0700
Subject: Returning other instance from __init__
In-Reply-To: <1huzkla.i6dshw1grnysmN%aleax@mac.com>
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
Message-ID: <1173958589.875188.203900@y80g2000hsf.googlegroups.com>

On 15 Mar, 06:21, a... at mac.com (Alex Martelli) wrote:
> Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> >
> > I would like to implement something like this:
> >
> > class C1:
> >       def __init__(self,xxx):
> >               if ... :
> >                       self.foo = foo
> >                       self.bar = bar
> >               else:
> >                       self=C1.load(xxx)
> >
> >       def load(xxx):
> >               ...
> >               return instance_of_C1
> >       load=staticmethod(load)
> >
> > This does not seem correct. How can I do it?
>
> Use __new__ for such purposes, not __init__.  (You need to make C1
> newstyle, e.g. inherit from object, to make special method __new__
> work).

Call me a traditionalist, but why wouldn't a factory function be good
enough?

def C1(xxx):
    if ...:
        return the_real_C1()
    else:
        return load(xxx)

def load(xxx):
    ...
    return instance_of_C1

Or perhaps seeing more special methods and decorators just puts me in
a grumpy mood. ;-) For me, the power of Python is derived from being
able to do things like making callables "constructors" whilst
providing some illusion that C1 (in this case) is a class.

Paul



From duncan.booth at invalid.invalid  Sat Mar 24 10:30:06 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 24 Mar 2007 14:30:06 GMT
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
Message-ID: <Xns98FD812654515duncanbooth@127.0.0.1>

"Dustan" <DustanGroups at gmail.com> wrote:
> Perhaps you're doing it wrong, despite having an example right in
> front of you?
> 
> Side by side comparison:
> jl=string.join(l,',')
> jl=','.join(l)
> 
> The sequence is passed as an argument to the join method, and the
> delimiter is the string whose method is being called.
> 

In case you are feeling that the ','.join(l) looks a bit jarring, be aware 
that there are alternative ways to write it. You can call the method on the 
class rather than the instance:

   jl = str.join(',', l)
   jl = unicode.join(u'\u00d7', 'l')

has the advantage of looking almost the same as the string function except 
that the order of the arguments is reversed, the catch is you need to know 
the type of the separator in advance. If you have a lot of calls with the 
same separator then you can also save the method in an appropriately named 
variable:

   commaseparated = ','.join
   ...
   jl = commaseparated(l)



From kw at codebykevin.com  Tue Mar 27 10:05:22 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Tue, 27 Mar 2007 10:05:22 -0400
Subject: Use threads or Tkinter event loop?
Message-ID: <ccd8f$460924a2$4275d90a$15349@FUSE.NET>

I'm trying to decide whether I need threads in my Tkinter application or 
not. My app is a front end to a command-line tool; it feeds commands to 
the command-line program, then reads its output and displays it in a 
Tkinter text widget. Some of the commands are long-running and/or return 
thousands of lines of output.

I initially thought I needed to use threading, because the GUI would 
block when reading the output, even when I configured the blocking to be 
non-blocking. I got threading to work, but it seemed a bit complicated. 
So, I decided to try something simpler, by using the Tkinter event loop 
to force the output to update/display.

it seems to work well enough. Here is my threaded code:

non-threaded:

def insertDump(self):
  self.finkinstalled = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
         for line in self.finkinstalled:
             self.t.insert(END, line)
             self.update()
             self.t.see(END)

And here is my non-threaded code (needs two functions to work)

  def insertDump(self):
         try:
             data = self.dataQueue.get(block=False)
             for line in data:
                 self.t.insert(END, line)
                 self.t.see(END)
                 self.update()


         except:
             print "error"
             raise

     def getDump(self):

         self.file = os.popen('/sw/bin/fink list', 'r', os.O_NONBLOCK)
         self.dataQueue.put(self.file)

This brings me to a design, as opposed to coding, question. The 
non-threaded version seems to work just as well as the threaded one, in 
terms of speed. Moreover, it is simpler to code and debug, because I 
don't have to check to make sure the thread queue has data (I sometimes 
get an 'Empty' error message when I first start the thread).  Simply 
using the Tk event loop (self.update) is also how I would have coded 
this in Tcl.

So my question is this: under what circumstances in Python are threads 
considered "best practice"? Am I wrong to use the Tk event loop instead 
of threads?

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From http  Tue Mar 13 18:43:02 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 14:43:02 -0800
Subject: Problem I have with a while loop/boolean/or
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
Message-ID: <7xwt1kix3d.fsf@ruckus.brouhaha.com>

"israphelr at googlemail.com" <israphelr at googlemail.com> writes:
> while (hint != 'n') or (hint != 'y'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> so everytime I run the program, and enter my choice as y or n, I'm
> told to 'Please Specify a valid Choice Again' and can't get out of the
> loop.

Suppose your hint is 'y'.  Ask yourself these two questions:

  1. Is (hint != 'n') true?
  2. Is (hint != 'y') true?

Now ask yourself what the condition in your while loop says.


From lbates at websafe.com  Fri Mar  9 16:58:41 2007
From: lbates at websafe.com (Larry Bates)
Date: Fri, 09 Mar 2007 15:58:41 -0600
Subject: Need help with a string plz! (newbie)
In-Reply-To: <1173477047.467568.298090@p10g2000cwp.googlegroups.com>
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<12v3ksihos7uj7a@corp.supernews.com>
	<1173477047.467568.298090@p10g2000cwp.googlegroups.com>
Message-ID: <2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>

israphelr at googlemail.com wrote:
> On Mar 9, 9:37 pm, Grant Edwards <gra... at visi.com> wrote:
>> On 2007-03-09, israph... at googlemail.com <israph... at googlemail.com> wrote:
>>
>>> I thought maybe I could create another variable and then assign each
>>> character into the new string by concatenating, makign a new string
>>> each time, but I find this a bit muddling at the moment. Any help'd be
>>> great. Thanks.
>> s = ''
>> for c in word:
>>     s = c + s
>> print s
>>
> 
> 
> Okay thanks very much, I used this method, since it's cloest one to I
> am already faimilar with.
> 
> Here's the final code..(if anyones interested)
> 
> ######################################################
> 
> print "\nWelcome !"
> print "\nEnter a word, and the world will be reversed!"
> 
> word = raw_input("\nPlease Enter a word: ")
> 
> end = len(word)
> end -= 1
> new_string = ""
> 
> for position in range(end, -1, -1):
>    new_string += word[position]
> 
> print new_string
> 
> raw_input("\nPress Enter to Exit")
> 
> #######################################
> 

If you are really trying to learn Python, you really owe it to
yourself to study Grant's replies.  You are using constructs
from some previous language that you learned and trying to
apply them to Python.  IMHO Python programmers would never use
s=c+s on strings as it is quite inefficient.  The methods
and functions he uses reversed(), .join(), list() are very
powerful Python constructs that you will need to learn how
to use.  The slicing word[-1::-1] is also something that
will come in handy later if you learn how to use it.  This
is a simple example that you can learn a lot from if you
will study Grant's responses.

Just my two cents.

-Larry


From albmont at centroin.com.br  Mon Mar 12 13:06:07 2007
From: albmont at centroin.com.br (Alberto Monteiro)
Date: Mon, 12 Mar 2007 15:06:07 -0200
Subject: New to Python
In-Reply-To: <55l63sF252nesU1@mid.uni-berlin.de>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
	<1173704503.459048.310560@t69g2000cwt.googlegroups.com>
	<mailman.4964.1173705902.32031.python-list@python.org>
	<55l63sF252nesU1@mid.uni-berlin.de>
Message-ID: <20070312170345.M78539@centroin.com.br>

Diez B. Roggisch wrote:
>
>> Also, basic things like how does "+" operate on object "xxx"
>> are impossible to google search.
> 
> For which language they are?
>
None :-)

> And in python you've got the 
> interpreter loop, either explicitly by invoking python on the 
> commandline and entering some statements, or implicitly by putting a
> 
> import pdb; pdb.set_trace()
>
> call on a place where you are interested in toying around with 
> objects. 

Ah! This is a precious help. This should be in the tutorials!!!

> I think you just have to adjust to the much more dynamic nature of 
> python a bit.
> 
I know. Maybe I am trying to adjust to too many things at the same
time.

Alberto Monteiro



From jeff at jmcneil.net  Tue Mar 13 23:07:59 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Tue, 13 Mar 2007 23:07:59 -0400
Subject: Eureka moments in Python
In-Reply-To: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <82d28c40703132007g13b9b598s406a82151c51a973@mail.gmail.com>

Bit of a newbie on this list, but here goes...

Web Services.

The company I'm working for has been pretty big into the WS-* specifications
and the Microsoft .Net WCF components for our business systems. I'm one of
three Unix guys that code the products while we've a larger team of Windows
developers that work on the accounting/billing/provisioning systems. We need
to make them all talk to each other.

Most of my programming experience had been in C and Java up until this
point, so my first reaction was to implement SOAP endpoints using AXIS (I
believe 2 had just come out) on the Unix systems. The back-office developers
would then "simply" generate .Net stub code off of hand-generated WSDL
documents (contract first).

What a nightmare. Honestly. Wow. I've dealt with some messed up systems in
my time but this stuff? It's supposed to be nice and new and shiney. The
complex types didn't match up. Wsdl2py would sit and spin whenever the .Net
development team would use some specific attributes on complex types.  We
spent a few days trying to get this stuff to click.

I wound up giving up on the whole AXIS thing and implementing a Python
framework built on SimpleXMLRPCServer. Rolling out a remote API for a
product component is a three or four day effort, including unit test and
acceptance test automation.  Comparable systems in Java (or heaven forbid,
even C in some instances) would take three to four weeks. Wow. Why didn't we
pick this up sooner?

Since the introduction of that component, we've moved all of our core
backend systems to Python. Systems that were 5 - 6 thousand lines of Java
have dropped down to 5 - 6 hundred lines of Python (SQLObject + dynamic
language eliminates dozens of DTO/DAO classes and corresponding
interfaces!).   I can honestly say that the Windows development group has
started reading a few of my books.  They're contemplating moving over to
Python as well.

All in all, it's been a huge hit. I had been moving smaller components over;
utilities that had been written in early versions of Perl 5 and whatnot. It
wasn't until I took a stab at the WS-* specifications that I realized how
much easier it was in Python.

Though, we've still got a few hundred thousand lines of Java laying around,
I won't be happy until that's history!

Thanks,

Jeff


On 3/13/07, Steven D'Aprano <steve at removeme.cybersource.com.au> wrote:
>
> I'd be interested in hearing people's stories of Eureka moments in Python,
> moments where you suddenly realise that some task which seemed like it
> would be hard work was easy with Python.
>
> I had a recent one, where I had spent some time creating a function which
> took a list as an argument, and then rearranged the items according to
> what magicians call a Monge shuffle. I had started off with a piece of
> code that walked the list, dropping items into two new lists, then
> combining them again. I got the code down to eight lines or so, something
> like this:
>
> # from memory, untested
> top, bottom = True, False # not strictly needed, but helps document code
> where = bottom
> holder = {top: [], bottom: []}
> for item in reversed(alist):
>     holder[where].append(item)
>     where = not where
> holder[bottom].reverse()
> print holder[bottom] + holder[top]
>
>
> And then it suddenly struck me that I could do it as a one-liner:
>
> alist[1::2] + list(reversed(alist[0::2]))
>
> Or if I wanted to be even more concise, if slightly less readable:
>
> alist[1::2] + alist[0::2][::-1]
>
> If only a real Monge shuffle with actual cards was so easy...
>
>
>
>
> --
> Steven D'Aprano
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From ptmcg at austin.rr.com  Sun Mar 11 04:40:06 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 11 Mar 2007 00:40:06 -0800
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <7x6498le9v.fsf@ruckus.brouhaha.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
	<1173578899.046177.104890@j27g2000cwj.googlegroups.com>
	<7x6498le9v.fsf@ruckus.brouhaha.com>
Message-ID: <1173602405.956438.140590@c51g2000cwc.googlegroups.com>

On Mar 10, 9:12 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> > if hist.has_key(outcome):
> >     hist[outcome] += 1  # if key already exists, increment
> > else:
> >     hist[outcome] = 1   # else create a new key
>
> You could write that:
>
>    hist[outcome] = 1 + hist.get(outcome, 0)
>
> Or with Python 2.5 you could use
>
>    hist = defaultdict(int)
>    ...
>    hist[outcome] += 1  # automatically initializes to 0 if outcome not found

Often when building a histogram, one knows in advance what the keys
will be.  For instance, when working with data from 0 to 100 and
looking for frequencies by decade, you can initialize the histogram-
dict with:

for i in range(10):
    histodict[i] = 0

and then just update the appropriate bucket without having to do any
testing at all:

fibSeqUpTo100 = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89]
for val in fibSeqUpTo100:
    key = val/10
    histodict[ key ] += 1

This has the added benefit of including entries for the empty buckets
as well.

-- Paul



From aleax at mac.com  Sun Mar  4 22:14:24 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 4 Mar 2007 19:14:24 -0800
Subject: Platform-specific compile flags in setup.py?
References: <NikitaTheSpider-0C9F38.21485704032007@news-server.nc.rr.com>
Message-ID: <1hugt9y.1ut6lsq16js8w1N%aleax@mac.com>

Nikita the Spider <NikitaTheSpider at gmail.com> wrote:

> Hi all,
> I'm a newbie when it comes to distributing C-based Python modules. I'm
> just now sharing my first with the rest of the world (it's actually V.
> Marangozov's shared memory module for IPC) and I've learned that the 
> module needs a different set of compile flags for Linux than for my Mac.
> My question is this: is there a convention or standard that says where
> platform-specific compile flags should reside? I could put them in 
> setup.py,

If you need, specifically, *compile-flags*, then setup.py is a good
place for them (also linker-flags &c).


> OTOH I know that within the .C file I can add something like 
> this:
> #ifdef __FreeBSD__
> #include <machine/param.h>  /* for system definition of PAGE_SIZE */
> #endif

This is NOT a "compile-flag" -- it's a reasonable C technique, though.


> That works, but for maximum Python programmer-friendliness I should 
> perhaps put the complexity in setup.py rather than in a .C file.
> 
> Opinions appreciated.

My opinion: flags in setup.py, conditional includes (&c) in the .c or .h
file[s].

If you can do something either way: if you know platform X will ALWAYS
want that something, "hard-code" it in the .c or .h; if you want to make
it easier to change for Python programmers, then put it in the setup.py.


Alex


From shatranjchess at gmail.com  Thu Mar 15 17:44:10 2007
From: shatranjchess at gmail.com (shatranjchess at gmail.com)
Date: 15 Mar 2007 14:44:10 -0700
Subject: New Chess Module
In-Reply-To: <7xd53aute3.fsf@ruckus.brouhaha.com>
References: <1173988685.077287.45240@l75g2000hse.googlegroups.com>
	<7xd53aute3.fsf@ruckus.brouhaha.com>
Message-ID: <1173995049.984559.235320@d57g2000hsg.googlegroups.com>

On Mar 15, 4:46 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> shatranjch... at gmail.com writes:
> > written in Python, it's not blazingly fast...but Kasparov
> > doesn't even look at 2k nodes per second, does he? ;-)
>
> Wow, cool.  Out of curiosity how many nodes per second does it look
> at?

depends on your processor speed...on a recent machine (~2.3GHz)
I can get about 2k nps without the psyco boost...but my goal was not
to beat the compiled programs with fast code.  I'd like to develop a
strong program with good evaluation and move ordering.  And perhaps
try search methods other than alphabeta.  Using bitboards should
make the first part easier and using python should help with the
second
part.

--Sam



From bj_666 at gmx.net  Thu Mar 15 13:53:37 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 15 Mar 2007 18:53:37 +0100
Subject: dict.items() vs dict.iteritems and similar questions
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
	<1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>
	<Xns98F4A2305FD17duncanbooth@127.0.0.1>
	<mailman.5140.1173979852.32031.python-list@python.org>
Message-ID: <pan.2007.03.15.17.53.36.70287@gmx.net>

In <mailman.5140.1173979852.32031.python-list at python.org>, skip wrote:

> Are you sure?  There's no guarantee that an iterator will terminate:
> 
>     len(list(itertools.cycle(range(10))))

You have infinite memory?  ;-)

Ciao,
	Marc 'BlackJack' Rintsch



From http  Sun Mar 11 19:21:38 2007
From: http (Paul Rubin)
Date: 11 Mar 2007 15:21:38 -0800
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
Message-ID: <7xps7f5ptp.fsf@ruckus.brouhaha.com>

"Paddy" <paddy3118 at googlemail.com> writes:
> > Most machines these days use IEEE 754 which supports negative zero.
> > http://en.wikipedia.org/wiki/Negative_zero
> 
> Isn't negative zero mathematically the same as zero? Isn't -0 just an
> artefact of the representation of floating point numbers? Shouldn't
> f(0) == f(-0) for all functions f?

Not sure what you mean.  "Floating point numbers" and in particular
"IEEE 754 floating point numbers" are a set of values and operations
with particular characteristics, that computers happen to implement.
They are not the same thing as the mathematical real numbers.  For
example, there are infinitely many real numbers, but there are only
finitely many 64-bit IEEE floating point numbers (at most 2**64 of
them).  They don't satisfy the same algebraic laws as real numbers.
For example, (1e100 + 1) == 1e100, and as a consequence, (1e100 + 1) -
1e100 == 0, but (1e100 - 1e100) + 1 == 1, so the commutative addition
law doesn't hold.  These are all part of a mesh of interlocking
compromises made in floating point computer arithmetic to approximate
real-number arithmetic with finite-precision values.  At first (i.e.
from the early computer era through the 1970's or so) this stuff was
designed somewhat ad hoc by computer architects, but eventually
serious numerical mathemticians got into the act, figuring out how to
make the best possible choices of these compromises for numerical
computation.  The result was IEEE 754, which resulted in Prof. Kahan
winning the Turing award in 1989.

IEEE 754 specifies that -0 and +0 are separate numbers.  Yes it is an
artifact in the sense of being one of the compromises.  But these
compromises all interact with each other to make the errors cancel in
various numerical algorithms.  The existence of -0 in IEEE 754 is part
of an intricate framework designed very carefully over a long period
by extremely experienced and knowledgeable people who knew what they
were doing.  It's not really wise to mess with it unless you're
planning to undertake a project to redesign computer arithmetic of
similar scope to the IEEE 754 effort.

> Getting back to Python, shouldn't we strive to remove any distinction?
> a zero is a zero regardless of sign and a function like atan returning
> one of two different vaues for an argument of zero is actually
> mathematically not a bad thing to do?

No.  Floating point numbers are not the same as real numbers and they
don't satisfy the same laws.  There have been some proposals
(rejected) for Python to support exact rational arithmetic in addition
to floating point and exact integer arithmetic.  Exact rationals in
Python (if implemented) should behave like mathematical rationals.
But Python floating point arithmetic should follow IEEE 754, at least
when the hardware supports it, which these days is almost always.


From nick at craig-wood.com  Sat Mar 31 05:30:03 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 31 Mar 2007 04:30:03 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<kFTOh.1088$5e2.392@newssvr11.news.prodigy.net>
Message-ID: <slrnf0s7qg.u6a.nick@irishsea.home.craig-wood.com>

John Nagle <nagle at animats.com> wrote:
>  Diez B. Roggisch wrote:
> > Nick Craig-Wood wrote:
> > 
> > 
> >>Did anyone write a contextmanager implementing a timeout for
> >>python2.5?
> >>
> >>And have it work reliably and in a cross platform way!
> > 
> > Cross platform isn't the issue here - reliability though is. To put it
> > simple: can't be done that way. You could of course add a timer to the
> > python bytecode core, that would "jump back" to a stored savepoint or
> > something like that.
> 
>       Early versions of Scheme had a neat solution to this problem.
>  You could run a function with a limited amount of "fuel".  When the
>  "fuel" ran out, the call returned with a closure.  You could
>  run the closure again and pick up from where the function had been
>  interrupted, or just discard the closure.

That sounds like a really nice concept.  That would enable you to make
long running stuff yield without threads too.

I wonder if it is possible in python...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From __peter__ at web.de  Thu Mar  1 06:08:33 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 01 Mar 2007 12:08:33 +0100
Subject: splitting perl-style find/replace regexp using python
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
	<ODxFh.3179$BE2.2738@newssvr27.news.prodigy.net>
	<1LxFh.3180$BE2.57@newssvr27.news.prodigy.net>
	<es69ki$928$03$1@news.t-online.com>
	<DZxFh.3182$BE2.1402@newssvr27.news.prodigy.net>
Message-ID: <es6c4n$1k8$00$1@news.t-online.com>

James Stroud wrote:

> Yes, this would be a case of the expression (left side) ending with a
> "\" as I mentioned above.

Sorry for not tracking the context.

Peter



From fer7msb02 at sneakemail.com  Fri Mar 16 14:59:32 2007
From: fer7msb02 at sneakemail.com (Yang)
Date: Fri, 16 Mar 2007 14:59:32 -0400
Subject: Determining cause of termination
Message-ID: <25874-72238@sneakemail.com>

Hi all, my Python (2.4) program crashed after a couple days of running
(this'll be a pain to debug, I know). I think it just...stopped
running. My log files didn't show any (unusual) exceptions (I use the
logging module to files and stdout/stderr piped to files). I have a
feeling that the python interpreter crashed - perhaps I consumed a lot
of memory and so CPython died. I also don't use ctypes or anything - I
do import some twisted modules but I don't really use them. There was
no core dump and I don't know how to elicit one. How can I find out as
much as possible what happened? For starters, I'm now checking exit
status and periodically running 'top' to monitor memory consumption,
but are there any other ideas?

Thanks in advance,

Yang


From zykhou at gmail.com  Sun Mar 25 19:57:52 2007
From: zykhou at gmail.com (Paul Kozik)
Date: Sun, 25 Mar 2007 16:57:52 -0700
Subject: XML minidom Parsing and ToPrettyXML
Message-ID: <60e9f3330703251657g53f68144tcf38e6fddf2c994b@mail.gmail.com>

I am trying to write a script that reads an XML file (using the
minidom module), makes an edit to a few attributes, then saves it
back. If I use minidom.Document() to create the xml file, then write
it with toprettyprint, it looks fine.

However, if I use xml.minidom.parse to parse the xml document, change
a few attributes with setAttribute, then write back with toprettyxml,
my XML file gets loaded up with spaces between many of the elements.

Like this,
<?xml ... ?>
<root>

       <tile />



       <tile />



       <tile />
</root>

I assume this has to do with the way xml.dom.minidom.parse parses the
file, because it will even do this without changing any attributes.
This whitespace damages readability, and bloats up the file.

Anyone know of a way to make the file look as it should, hopefully in
a pythonic way?


From gtcopeland at gmail.com  Wed Mar 21 12:06:55 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 21 Mar 2007 09:06:55 -0700
Subject: socket.getfqdn deadlock
In-Reply-To: <1174418583.490159.224260@e65g2000hsc.googlegroups.com>
References: <1174418583.490159.224260@e65g2000hsc.googlegroups.com>
Message-ID: <1174493215.616517.52400@b75g2000hsg.googlegroups.com>

On Mar 20, 2:23 pm, vvik... at gmail.com wrote:
> Hi,
>
> I am getting deadlocks (backtrace pasted below) after a while at,
> presumably, a socket.getfqdn() call in a child process .
>
> Fwiw: This child process is created as the result of a pyro call to a
> Pyro object.
>
> Any ideas why this is happening?


Are you sure it is not timing out, waiting for a DNS reply?

Greg



From bearophileHUGS at lycos.com  Mon Mar  5 17:22:10 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 5 Mar 2007 14:22:10 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <mailman.4693.1173129006.32031.python-list@python.org>
References: <mailman.4693.1173129006.32031.python-list@python.org>
Message-ID: <1173133330.310548.52080@n33g2000cwc.googlegroups.com>

Steven W. Orr:
> I have a list ll of intergers. I want to see if each number in ll is
> within the range of 0..maxnum

One possible nice solution (Python V.2.5):

data = [1, 20, 22, 11, 400, 7]
maxnum = 100
print all(0 <= x <= maxnum for x in data)
maxnum = 1000
print all(0 <= x <= maxnum for x in data)

Bye,
bearophile



From deets at nospam.web.de  Thu Mar 15 13:44:19 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 15 Mar 2007 18:44:19 +0100
Subject: most complete xml package for Python?
In-Reply-To: <1173909884.822838.264030@n76g2000hsh.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
	<1173908076.351577.75000@n59g2000hsh.googlegroups.com>
	<1173909884.822838.264030@n76g2000hsh.googlegroups.com>
Message-ID: <55tevoF270hd4U1@mid.uni-berlin.de>

metaperl schrieb:
> On Mar 14, 5:34 pm, "John Machin" <sjmac... at lexicon.net> wrote:
> 
> 
>> Given keywords like "Amara" and "Elementtree" and past history, it
>> looked to me like a troll of one kind trying to incite a troll of
>> another kind to pop out from under the bridge and chew on his
>> ankle :-)
> 
> Well, I'm not a troll. And I am now even less impressed with
> ElementTree. It does not preserve the document but reforms it in
> certain cases.
> 
> <script></script>
> 
> gets rewritten as
> 
> <script />
> 
> which leads to problems when embedding Dojo Rich Text Editors.

Beside the fact that this is a problem of browsers (which won't help you 
much, as you have to deal with this somehow, blaming browsers alone 
isn't solving problems I'm just too aware of), I wonder: which XML 
framework _does_ preserve such tags?

I can't imagine a way of doing so as a DOM node is a DOM node. I could 
only create a custom renderer for HTML to circumvene that specific 
pitfall - but then, you could also create a post-rendering filter 
regex-based that expands the script-tags

Diez


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 01:13:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 03:13:49 -0300
Subject: Problem with Packages
References: <1173332271.733596.159790@p10g2000cwp.googlegroups.com>
Message-ID: <op.touwxbbax6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 02:37:51 -0300, Srikanth <sri1025 at gmail.com> escribi?:

> I am learning about Python packages and I am getting an ImportError
> but I can't figure out the reason why.

It appears that you forgot the basic rule: a package is a directory with  
an __init__.py file (even if empty).

> I have three modules and they are stored in a directory hierarchy as:
>
> my_apps
> |
> |--> mod3.py
> |--> dir1/dir1_1/mod1.py
> |--> dir2/dir2_2/mod2.py

You need 4 of such files here.

> And the directory my_apps is included in PYTHONPATH environment
> variable, what am I doing wrong? I executed this code under PyDev and
> it's working perfectly but when I run it outside of PyDev, it fails.

Maybe PyDev plays some tricks with PYTHONPATH or something...

-- 
Gabriel Genellina



From psdasilvaX at esotericaX.ptX  Sat Mar 17 17:31:52 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 17 Mar 2007 21:31:52 +0000
Subject: Still the __new__ hell ...
Message-ID: <1174167360.522350@jubilee.claranet.pt>

Sorry to put here too many questions about __init__ __new__
stuff but I always found a new problem when using them.
I have searched for simple __new__ docs on how to do the
basic things but find none.

After trying the solutions people gently posted here
(thanks) I run into new trouble when I go with further
development.

Here is the new situation.

As suggested in a previous post, I used __new__ to
subclass date class but now cPickle/pickle loads
does not work.

from datetime import date
import cPickle,string

class MyDate(date):
	def __new__(cls,year,month=None,day=None):
		if type(year) is str:
			year,month,day=map(int,string.split(year,'-'))
		if year<100:
			year+=2000
		return date.__new__(cls,year,month,day)

class C1(object):
	def __init__(self):
		self.x=MyDate("2007-3-15")

	def f(self):
		print self.x

c1=C1()

d=cPickle.dumps(c1)
c2=cPickle.loads(d)
c2.f()

1. year is passed to __new__ as a string but with invalid
contents!

2. If I had a __new__ in class C1, cPickle.loads invokes it
with only one parameter. This forces to allow __new__ accept
only 1 parameter (cls) which I don't want for the normal
situation.

Thanks for your patience.
Paulo


From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 21 17:27:12 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 22:27:12 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it couldbe PEP?)
In-Reply-To: <1174502836.912713.294390@y80g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<mailman.5413.1174502330.32031.python-list@python.org>
	<1174502836.912713.294390@y80g2000hsf.googlegroups.com>
Message-ID: <46019ab4$0$14548$426a74cc@news.free.fr>

bearophileHUGS at lycos.com a ?crit :
> I have nothing against brackets, and I think Python has used them for
> too much time to allow a so big change in its syntax.
> But I think in some situations Ruby allows to omit them,

<iirc notice="please someone correct me if I say something wrong">
Yes. But in Ruby, there's a clear distinction between attributes and 
methods, and attributes are always private, so you can only access them 
thru method calls. Also, Ruby's methods are not really first class 
objects - at least not the way they are in Python -, so when returning a 
'callable' object from a method, you have to call a method of the object 
(something like callable.call IIRC).
</iirc>

> solving some
> of the "impossibile" problems shown in this thread. This makes Ruby a
> bit better than Python to create application-specific mini languages,
> that are quite useful in some situations.

I'd say 'a bit more elegant', not necessarily 'better'. But that's of 
course very subjective, and I have far less experience with Ruby.



From ptmcg at austin.rr.com  Fri Mar 16 09:48:12 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Mar 2007 06:48:12 -0700
Subject: Mastering Python
In-Reply-To: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
Message-ID: <1174052892.406650.159190@y80g2000hsf.googlegroups.com>

On Mar 16, 6:41 am, "Gerald" <gerald... at gmail.com> wrote:
> Hi ,Im a BSc4 Maths/Computer Science student.Unfortunately my
> curriculum did not include Python programming yet I see many vacancies
> for Python developers.I studied programming Pascal,C++ and Delphi.So I
> need to catch up quickly and master Python programming.How do you
> suggest that I achieve this goal?Is python platform independent?What
> is the best way?And how long would it take before I can develop
> applications using python?Can you recommend websites that feature a
> gentle introduction to Python?

P.S. You'll get further faster with Python than with Java or Perl,
where you posted similar "how do I master language X?" requests.  I've
used Java and suffered through Perl.  Compared to Perl, Python a) has
less magic symbology/punctuation, and b) treats you more like an adult
("open x or die"? Come on!).  Java syntax is so bloated you have to
tack on Eclipse plug-ins by the fistful to auto-generate the wrapper
junk code around the code you really wanted to get run.

Get thee to www.python.org, and get going, post haste!



From thardy99 at gmail.com  Wed Mar 14 13:32:02 2007
From: thardy99 at gmail.com (Teresa Hardy)
Date: Wed, 14 Mar 2007 10:32:02 -0700
Subject: Fwd: Server-side script takes way too long to launch
In-Reply-To: <82d28c40703131233t7ef7137at21a7dece123b425b@mail.gmail.com>
References: <e0582b0b0703131005q305ddb0dic7fdffd8811aaf22@mail.gmail.com>
	<d25b6e9a0703131012i484f0187uaffb1c080200a3a0@mail.gmail.com>
	<82d28c40703131028n458bddd7gff5deb1d45703279@mail.gmail.com>
	<e0582b0b0703131217y2481bf1dib7f477444497b9cb@mail.gmail.com>
	<82d28c40703131233t7ef7137at21a7dece123b425b@mail.gmail.com>
Message-ID: <e0582b0b0703141032h40423c21h283d765a85ceeda9@mail.gmail.com>

Thanks Jeff for all the great advice on where to look next, including help
with mailman. (I fell off the list and am using this reply to figure out
why!) Just switched to gmail and still learning it too.

And thanks for being so kind in the code review. Fundamentally, I had too
many imported modules in the original code so I partitioned it to run more
efficiently. The data from the machine up at school on the subset of code
was closer to yours. You have definitely put me back on track.
Thanks,
Teresa


---------- Forwarded message ----------
From: Jeff McNeil <jeff at jmcneil.net>
Date: Mar 13, 2007 12:33 PM
Subject: Re: Server-side script takes way too long to launch
To: Teresa Hardy <thardy99 at gmail.com>

Can you send the program? It's hard to try and follow through without...
With the additional socket library calls, that could contribute.

On 3/13/07, Teresa Hardy <thardy99 at gmail.com> wrote:
>
> Josh, someone mentioned mod_python to me and I wasn't sure if it was the
> right/best solution for accelerating python. I'll chase that one down.
>
> Jeff, If I read this right, the browser isn't showing the launched swf for
> a good 7 seconds on top of the initial latency...some of which is expected.
> There is something else going on with a socket class running without being
> called. Restart doesn't seem to help. But the discussion is helping me
> through some code that might be contributing to the problem. I am going to
> make some more test runs with a subset of the code. In the meantime there
> might be something more obvious to an expert in what I am sending.
>
> I like to quote Michael Crighton from his Airframes book..."it is always a
> compounding series of events that causes a crash."
>
> Any advice greatly appreciated!
>
> Access log from Apache...
>  127.0.0.1 - - [13/Mar/2007:11:33:06 -0700] "GET
> /cgi-bin/finalcode.py?usae HTTP/1.1" 200 231
> 127.0.0.1 - - [13/Mar/2007:11:33:07 -0700] "GET /favicon.ico HTTP/1.1" 200
> 3262
> 192.168.1.51 - - [13/Mar/2007:11:33:17 -0700] "GET /choosetemplate.swf
> HTTP/1.1" 200 250695     <-------<<<<
> 192.168.1.51 - - [13/Mar/2007:11:33:17 -0700] "GET /favicon.ico HTTP/1.1"
> 200 3262
> 127.0.0.1 - - [13/Mar/2007:11:30:09 -0700] "GET /cgi-bin/finalcode.py?usae
> HTTP/1.1" 200 231
> 127.0.0.1 - - [13/Mar/2007:11:33:21 -0700] "GET /cgi-bin/xmlmaker.py?swf1
> HTTP/1.1" 200 132
>
> My run log inside Python...
> start Tue Mar 13 11:30:10 2007 Tue Mar 13 11:30:10 2007
> inside distractor Tue Mar 13 11:30:10 2007
> <-------<<<<
> after display1.join Tue Mar 13 11:30:10 2007
> Socket in msg init
> in main program theme before bridge... Tue Mar 13 11:30:10 2007
> Connection received from: 192.168.1.51
> Socket out msg swf1
> Connection terminated Tue Mar 13 11:33:21 2007
> in main program theme... swf1 Tue Mar 13 11:33:21 2007
>
>
> On 3/13/07, Jeff McNeil <jeff at jmcneil.net> wrote:
> >
> > But even if the server was loading Python on each hit, which it will for
> > CGI, it shouldn't take "a count to 13", especially on localhost. That to me
> > is an indication of a further problem.  Does it take that long to load with
> > each hit, or just the first following a server restart?  What do log
> > timestamps say from initial hit until last-byte from your Python script?
> >
> > Might want to validate your Apache configuration and have a look at
> > httpd.apache.org.  Sounds to me like DNS lookups are enabled or
> > something of the sort.
> >
> > Thanks,
> >
> > Jeff
> >
> >
> > On 3/13/07, Josh Bloom < joshbloom at gmail.com > wrote:
> > >
> > > Teresa, when you call a python script this way, the server needs to
> > > load the python interpreter for each call.
> > >
> > > If you need faster execution you should look into having a server
> > > process running already. Something like mod_python for apache or CherryPy
> > > will help you speed this up.
> > >
> > > -Josh
> > >
> > >
> > > On 3/13/07, Teresa Hardy < thardy99 at gmail.com> wrote:
> > >
> > > > I have a webpage calling a python script, using Apache
> > > > server....http://localhost/cgi-bin/mycode.py?dmn
> > > > I am using Firefox, WindowsXP Python 2.4
> > > >
> > > > I can count to 13 from the time I click to the time the browser
> > > > finds the path.
> > > >
> > > > The python runs okay when I finally get to it. In the first step it
> > > > just launches a Flash file. I benchmarked the time thru the python code and
> > > > it isn't the slow part. It's the launch. Forgive me if I am not explaining
> > > > this well. I am pretty much teaching myself...fumbling thru the process.
> > > >
> > > > Any suggestions on how to speed up the first step?
> > > >
> > > > Thanks,
> > > > Teresa
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> > >
> > >
> > > --
> > > http://mail.python.org/mailman/listinfo/python-list
> > >
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
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From jstroud at mbi.ucla.edu  Sun Mar 25 07:40:44 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 25 Mar 2007 11:40:44 GMT
Subject: Tkinter Toplevel geometry
In-Reply-To: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
Message-ID: <0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>

Chris wrote:
> Hi,
> 
> If a user resizes a Toplevel window, or I set a Toplevel's geometry
> using the geometry() method*, is there any way to have the geometry
> reset to that required for all the widgets?
> 
> I think I found what I'm looking for in tk itself:
> """
> 13.3. How can I clear the geometry settings for a toplevel?
> If you want to have Tk resize your toplevel to what the toplevel
> requires (ie: the user might have resized it, or a widget was
> removed), use [wm geometry $toplevel].
> """
> [from http://tcl.sourceforge.net/faqs/tk/]
> 
> 
> 
> * for instance, if I want to turn of Tkinter's automatic adjustment of
> the window to fit all the widgets by doing something like
> self.geometry(self.geometry()), is there any way to undo that?
> 
> Thanks,
> Chris
> 

Hi Chris,

I think you are on to something. The equivalent of

    [wm geometry $toplevel]

in Tkinter would be

    sometop.geometry()

Or, equivalently,

    sometop.wm_geometry()

Or, calling the underlying tcl/tk interpreter directly

    sometop.tk.call('wm', 'geometry', str(sometop))

Which is redundant, but emphasizes the point: This does not resize the
widget as expected nor does it cause the window to resize upon adding 
new packing slaves--at least for the X11 based Tkinter for mac via the 
fink debian based package manager.

Really wish things worked according to the docs a lot of the time or 
that they weren't so poorly written. Perhaps they are implying that you 
must pass parameters, however they do not explain how one might generate 
said parameters to get the required size to which they allude. Terribly 
disappointing.

James


From steve at holdenweb.com  Wed Mar 21 12:34:16 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 12:34:16 -0400
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it   could be PEP?)
In-Reply-To: <1174493856.663144.236880@y80g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174493856.663144.236880@y80g2000hsf.googlegroups.com>
Message-ID: <etrmsr$6et$1@sea.gmane.org>

Bart Ogryczak wrote:
> On Mar 21, 3:38 pm, "dmitrey" <open... at ukr.net> wrote:
>> Hi all,
>> I looked to the PEPs & didn't find a proposition to remove brackets &
>> commas for to make Python func call syntax caml- or tcl- like: instead
>> of
>> result = myfun(param1, myfun2(param5, param8), param3)
>> just make possible using
>> result =  myfun param1 (myfun2 param5 param8) param3
> 
> How would you write "a = b(c())"?
> 
> In my opinion it'll make code extremely obfuscaded. The great thing
> about Python, when comparing with eg. Perl or C, is that code is
> readable, even if written by experienced hacker.
> 
> 
Yes, but let's not forget that we are in half-baked idea territory here.

The fact that dmitrey didn't twig that the absence of such a proposal 
was likely for good reasons implies either an intellectual arrogance 
beyond that of most mere mortals or a goodly dollop of ignorance.

Maybe we could omit the leading whitespace as well?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From luuk at invalid.lan  Sat Mar 17 14:07:29 2007
From: luuk at invalid.lan (Luuk)
Date: Sat, 17 Mar 2007 19:07:29 +0100
Subject: read a web page using python
References: <1174153847.939415.169620@o5g2000hsb.googlegroups.com>
Message-ID: <45fc2e5f$0$323$e4fe514c@news.xs4all.nl>


<myTesterFrench at gmail.com> schreef in bericht 
news:1174153847.939415.169620 at o5g2000hsb.googlegroups.com...
> Hi All,
>
> Kindly, could you someone tell me how to read a page(any web site)
> using Python, what method to be used ?
>
> Paris
>

http://www.amk.ca/python/howto/sockets/




From grflanagan at yahoo.co.uk  Tue Mar 13 08:57:37 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 13 Mar 2007 05:57:37 -0700
Subject: How to capture environment state after running a shell script.
Message-ID: <1173790656.886985.65660@v33g2000cwv.googlegroups.com>

Hello,

I have a third party shell script which updates multiple environment
values, and I want to investigate (and ultimately capture to python)
the environment state after the script has run. But running the script
as a child process only sets values for that process, which are lost
after execution.  So I thought I could simply tack on an 'env' command
line to the script input lines as shown below. However, using
subprocess.Popen gives the error shown (even though the docs say that
any file object may be used for stdin), and using popen2 hangs
indefinitely. I think I'm missing something basic, any advice? Or is
there a better approach?

(This is Python 2.4 and a Korn shell script on AIX Unix)

Thanks in advance.

from StringIO import StringIO
from subprocess import Popen
from popen2 import popen2

fname = '/opt/WebSphere/AppServer/bin/setupCmdLine.sh'

buf = StringIO()

f = open(fname, 'r')

try:
    f.readline() #ignore shebang
    for line in f:
        buf.write(line)
finally:
    f.close()

buf.write('\nenv\n')

buf.seek(0)

########## first method ##########
p = Popen('/bin/sh', stdin=buf)
print p.stdout.readlines()

Traceback (most recent call last):
  File "scratch.py", line 36, in ?
    p = Popen('/bin/sh', stdin=buf)
  File "/usr/local/lib/python2.4/subprocess.py", line 534, in __init__
    (p2cread, p2cwrite,
  File "/usr/local/lib/python2.4/subprocess.py", line 830, in
_get_handles
    p2cread = stdin.fileno()
AttributeError: StringIO instance has no attribute 'fileno'

########## second method ##########
cmdout, cmdin = popen2('/bin/sh')
for line in buf:
    cmdin.write(line)

ret = cmdout.readlines()
cmdout.close()
cmdin.close()

print ret



From bj_666 at gmx.net  Mon Mar 12 14:44:58 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 12 Mar 2007 19:44:58 +0100
Subject: File locking
References: <1173722982.696539.24360@64g2000cwx.googlegroups.com>
Message-ID: <pan.2007.03.12.18.44.57.137889@gmx.net>

In <1173722982.696539.24360 at 64g2000cwx.googlegroups.com>, Dr. Who wrote:

> Please let me know if I'm missing something since they seem like
> normal file operations that I would hope Python would abstract away.

I don't think of them as "normal" operations.  They are "extra" stuff that
is not only dependent on the operating system but also on the file system
in use.

Ciao,
	Marc 'BlackJack' Rintsch


From supercooper at gmail.com  Tue Mar 27 16:41:44 2007
From: supercooper at gmail.com (supercooper)
Date: 27 Mar 2007 13:41:44 -0700
Subject: urllib timeout issues
In-Reply-To: <mailman.5681.1175026431.32031.python-list@python.org>
References: <1175023315.536080.276550@n76g2000hsh.googlegroups.com>
	<mailman.5681.1175026431.32031.python-list@python.org>
Message-ID: <1175028104.429759.165920@n76g2000hsh.googlegroups.com>

On Mar 27, 3:13 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 27 Mar 2007 16:21:55 -0300, supercooper <supercoo... at gmail.com>
> escribi?:
>
> > I am downloading images using the script below. Sometimes it will go
> > for 10 mins, sometimes 2 hours before timing out with the following
> > error:
>
> >     urllib.urlretrieve(fullurl, localfile)
> > IOError: [Errno socket error] (10060, 'Operation timed out')
>
> > I have searched this forum extensively and tried to avoid timing out,
> > but to no avail. Anyone have any ideas as to why I keep getting a
> > timeout? I thought setting the socket timeout did it, but it didnt.
>
> You should do the opposite: timing out *early* -not waiting 2 hours- and
> handling the error (maybe using a queue to hold pending requests)
>
> --
> Gabriel Genellina

Gabriel, thanks for the input. So are you saying there is no way to
realistically *prevent* the timeout from occurring in the first
place?  And by timing out early, do you mean to set the timeout for x
seconds and if and when the timeout occurs, handle the error and start
the process again somehow on the pending requests?  Thanks.

chad



From lbates at websafe.com  Mon Mar 12 16:22:42 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 12 Mar 2007 15:22:42 -0500
Subject: Newbie Question : "grep"
In-Reply-To: <1173724336.993257.41540@s48g2000cws.googlegroups.com>
References: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
	<45f5864f$1@nntp.zianet.com> <45f5877c$1@nntp.zianet.com>
	<1173722120.347200.37610@n33g2000cwc.googlegroups.com>
	<1173724336.993257.41540@s48g2000cws.googlegroups.com>
Message-ID: <45F5B692.2060303@websafe.com>

moogyd at yahoo.co.uk wrote:
> On 12 Mar, 18:55, attn.steven.... at gmail.com wrote:
>> On Mar 12, 10:01 am, "Erik Johnson" <nob... at invalid.com> wrote:
>>
>>
>>
>>> Sorry, I forgot to paste the modified version of my code in the post:. I
>>> think this is the same behaviour:
>>> for line in lines:
>>>     if "placed" in line:
>>>         if "i_a/i_b/ROM/" in line:
>>>             pos = (line.split()[4]).split("_")[1]
>>>             found = False
>>>             for (tag, (start, end)) in tags:
>>>                 if tag in line:
>>>                     found = True
>>>                     print "        i_a/i_b/ROM/%s [%i:%i] LOC =" %\
>>>                         (pos, tag, start, end)
>>>                     break
>>>             if not found:
>>>                 print "Error"
>> Instead of using a sentinal value (i.e., found),
>> one can use the 'else' clause of a 'for' loop...
>>
>> pos = (line.split()[4]).split("_")[1]
>> for (tag, (start,end)) in tags:
>>     if tag in line:
>>         print "    i_a/i_b/ROM/%s [%i:%i] LOC=%s" %\
>>             (pos,tag,start,end)
>>         break
>> else
>>     print "Error"
>>
>> --
>> Hope this helps,
>> Steven
> 
> Thanks for the responses.
> 
> I had an inkling what the solution may be, but I wondering whether I
> could avoid the nested loops (i.e. loop every line and then loop every
> pattern), maybe using maps or list comprehensions (this is just
> intellectual curiosity as the current solution obviously does the job.
> 
> Steven
> 

You can certainly get it down pretty small if you turn it into a function
as I did, and use a list comprehension, but I think it is hard to read.

def search(line):
    global search_gates
    for gate, index in search_gates:
        pos = (line.split()[4]).split("_")[1]
        if gate in line:
            return "        i_a/i_b/ROM/%s %s LOC =%s" % (gate, index, pos)


    return "Error"


search_gates=[('B6', '[1:0]'), 'B10', '[3:2]'),
               'B14', '[5:4]'), 'B17', '[7:6]')]

print '\n'.join([search(line) for line in lines])

-Larry


From harry.g.george at boeing.com  Wed Mar 28 02:46:07 2007
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 28 Mar 2007 06:46:07 GMT
Subject: Numeric Soup
References: <46094afe$1@nntp.zianet.com>
	<mailman.5676.1175016264.32031.python-list@python.org>
	<460969b6$1@nntp.zianet.com>
Message-ID: <xqxmz1xsw5s.fsf@cola3.ca.boeing.com>

"Erik Johnson" <nobody at invalid.com> writes:

> "Robert Kern" <robert.kern at gmail.com> wrote in message
> news:mailman.5676.1175016264.32031.python-list at python.org...
> 
> > http://www.scipy.org/History_of_SciPy
> >
> > numpy is the current array package and supercedes Numeric and numarray.
> scipy
> > provides a bunch of computational routines (linear algebra, optimization,
> > statistics, signal processing, etc.) built on top of numpy.
> 
> Thank you.
> 
> 

Also see gsl and its python binding.
http://www.gnu.org/software/gsl/
http://sourceforge.net/projects/pygsl

-- 
Harry George
PLM Engineering Architecture


From andre.dos.anjos at gmail.com  Thu Mar  1 07:59:51 2007
From: andre.dos.anjos at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 1 Mar 2007 04:59:51 -0800
Subject: Importing binary modules
In-Reply-To: <mailman.4565.1172748207.32031.python-list@python.org>
References: <1172746279.351722.29410@p10g2000cwp.googlegroups.com>
	<mailman.4565.1172748207.32031.python-list@python.org>
Message-ID: <1172753991.529526.50190@z35g2000cwz.googlegroups.com>

On 1 mar, 12:21, Thinker <thin... at branda.to> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> andre.dos.an... at gmail.com wrote:
>
> cut ......................
>
> > The problem appears when libMyNewModule.so depends on another
> > library, say libfoo.so, which sits also in /my/module/dir. In that
> > case, '/my/ module/dir', needs to be preset in the LD_LIBRARY_PATH
> > *before* the python interpreter is set.
>
> > In this case, the snippet of code above will not work as one would
> > expect. It will normally give an ImportError saying it cannot find
> > libfoo.so. That happens, apparently, because the dynamic linker
> > cannot rescan LD_LIBRARY_PATH after the python interpreter has
> > started.
>
> Since you create a new module, you should try to link your module with
> - -rpath-link option.
> You can specify a path searched by linker when finding shared object
> required.
>
> - --
> Thinker Li - thin... at branda.to thinker... at gmail.comhttp://heaven.branda.to/~thinker/GinGin_CGI.py
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.6 (FreeBSD)
> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>
> iD8DBQFF5rcp1LDUVnWfY8gRAmLcAKCobvo06x84L0pj66amTBspTJ9nUwCg5sA+
> MP7tLF/i8zqoZHl5Fxw2YsQ=
> =BNQy
> -----END PGP SIGNATURE-----

Well, unfortunately I don't have access to the binary like that. It is
given me, I just wanted to use it the way it was compiled. What could
be done then?



From laurent.pointal at limsi.fr  Fri Mar 30 09:51:28 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 30 Mar 2007 15:51:28 +0200
Subject: Object Oriented Database with interface for Pyhton
In-Reply-To: <mn.f3567d73834c7f3d.46195@XX.XmclaveauX.com>
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
	<1175247009.786698.72390@l77g2000hsb.googlegroups.com>
	<460ce036$0$1390$426a74cc@news.free.fr>
	<mn.f3567d73834c7f3d.46195@XX.XmclaveauX.com>
Message-ID: <euj4kb$rqo$2@news2.u-psud.fr>

MC a ?crit :
> Salut!
> 
> Heureusement qu'il y a qq fran?ais pour faire un peu de m?nage...

Question de d?calage horaire ?




From zburnham at gmail.com  Fri Mar 30 10:01:16 2007
From: zburnham at gmail.com (Evil Otto)
Date: 30 Mar 2007 07:01:16 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <0sfp03d9epf50d1o9jj22ni1al4o69ut9k@4ax.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175225665.929475.183360@n59g2000hsh.googlegroups.com>
	<0sfp03d9epf50d1o9jj22ni1al4o69ut9k@4ax.com>
Message-ID: <1175263276.576403.10930@l77g2000hsb.googlegroups.com>

On Mar 30, 3:46 am, nullified <n... at null.null> wrote:
> On 29 Mar 2007 20:34:26 -0700, "Evil Otto" <zburn... at gmail.com> wrote:
>
> >On Mar 29, 2:19 pm, aral... at aol.com wrote:
> >> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan
>
> >I really, really hope that you're looking to generate test data or
> >filler text.
>
> >If you're not, then DIAF.
>
> Die In A Fire? Drop In A Fryer? Doug Is A Fucker? Drown In A Fart?

Any of those would accurately describe the underlying sentiment, but I
had "Die In A Fire" in mind specifically.



From http  Tue Mar 13 15:36:53 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 11:36:53 -0800
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<1173813714.767225.164790@q40g2000cwq.googlegroups.com>
Message-ID: <7xird5ndey.fsf@ruckus.brouhaha.com>

"Arnaud Delobelle" <arnodel at googlemail.com> writes:
> in the for loop.  Moreover you recalculate the regexp for each element
> of the list.

The re library caches the compiled regexp, I think.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 21 06:51:32 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 11:51:32 +0100
Subject: Still the __new__ hell ...
In-Reply-To: <1174337519.926611@jubilee.claranet.pt>
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
	<1174337519.926611@jubilee.claranet.pt>
Message-ID: <46010e1a$0$2347$426a74cc@news.free.fr>

Paulo da Silva a ?crit :
> Bruno Desthuilliers escreveu:
>> Paulo da Silva a ?crit :
> ...
> 
>>> class MyDate(date):
>>>     def __new__(cls,year,month=None,day=None):
>>>         if type(year) is str:
>> And what if it's a unicode string ?
>> The correct idiom here is:
>>                  if isinstance(year, basestring):
>>
> 
> 
> Thanks.
> If I do type(year) I get either int or str (may be unicode for unicode
> strings) but never anything like basestring.

It's an abstract class.

> As a relatively inexperient
> in python, how could I know that a 'string' is an instance of
> basestring?

By reading this newsgroup ?-)

> x=u"xxxxxx"; help(x) says this is unicode based on
> basestring but help does not "work" for x="xxxxxxxx".

help(str)

> May be the python tutorial should be upgraded to include these new
> concepts. Also covering the basics of __init__/__new__ (why have both?)

It's a long story. But it's a GoodThing(tm) IMVHO.


From ianmurrays at gmail.com  Sun Mar 18 15:01:09 2007
From: ianmurrays at gmail.com (Synt4x)
Date: 18 Mar 2007 12:01:09 -0700
Subject: Webcams and python
In-Reply-To: <1174241842.666367.25290@n76g2000hsh.googlegroups.com>
References: <1174182674.500068.252550@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.08.24.46.950750@gmx.net>
	<1174228881.417754.26020@e65g2000hsc.googlegroups.com>
	<1174241842.666367.25290@n76g2000hsh.googlegroups.com>
Message-ID: <1174244469.099300.86910@l77g2000hsb.googlegroups.com>

On 18 mar, 14:17, "sturlamolden" <sturlamol... at yahoo.no> wrote:
> On Mar 18, 3:41 pm, "Synt4x" <ianmurr... at gmail.com> wrote:
>
> > The problem with adding a sleep() instrucction is that the "video
> > feed" looks lagged, if you know what I mean. It looks interrupted.
>
> You could try win32api.Sleep(0) instead, which will release the
> reminder of the time slice.

I haven't been able to find the win32api extension, but i've read on
the web that time.sleep() calls win32api.Sleep().



From one.three at gmail.com  Sun Mar  4 04:52:05 2007
From: one.three at gmail.com (13)
Date: Sun, 4 Mar 2007 11:52:05 +0200
Subject: Where I could find older python releases ?
Message-ID: <2f3066870703040152n327140f3p9d0a132a807ebe80@mail.gmail.com>

Hello list,

I have been searching the internet for python version 0.9.0 sources
which had been posted to alt.sources list, but without any luck. Maybe
someone has it available somewhere ?

Thanks,
Martins


From jfine at pytex.org  Tue Mar 20 12:50:01 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 20 Mar 2007 16:50:01 +0000
Subject: Wanted:  a python24 package for Python 2.3
References: <45FFFEB6.2080403@pytex.org> <1hv9nvz.1gpov9wh4av3fN%aleax@mac.com>
Message-ID: <460010B9.4030803@pytex.org>

Alex Martelli wrote:
> Jonathan Fine <jfine at pytex.org> wrote:
>    ...
> 
>>In other words, I'm asking for a python24 package that
>>contains all (or most) of the modules that are new to
>>Python 2.4.
> 
> 
> For subprocess specifically, see
> <http://www.lysator.liu.se/~astrand/popen5/> .  

Thanks for the URL.

> I don't think anybody's
> ever packaged up ALL the new stuff as you require.

Actually, all I require (for now) is subprocess.  So
I went and made a python24 module.  I'll change this
if people think something else would be better.  (It's
easy to ask for forgiveness than ask for permission.)

I can show you what I've done:
     http://texd.cvs.sourceforge.net/texd/py/python24/
http://texd.cvs.sourceforge.net/texd/py/tex/util.py?revision=1.4&view=markup

My idea is that python24 should contain the Python 2.4
modules that those who are still on Python 2.3 might
want to use.

Similarly, python26 would be modules that are new
for Python 2.6 (which has not been released next).

I doubt that I'm the only one with this problem, and
this is my suggestion for making it easier to solve.

-- 
Jonathan




From codecraig at gmail.com  Wed Mar 14 07:29:05 2007
From: codecraig at gmail.com (abcd)
Date: 14 Mar 2007 04:29:05 -0700
Subject: Quick Filter Dictionary
Message-ID: <1173871745.698892.189470@n76g2000hsh.googlegroups.com>

Hi,
   I have a dictionary which may contain various keys/values, however,
it will always contain 'name' and 'age' keys.

   This dictionary is kept inside a class, such as....

    class Person:
        def __init__(self, name, age):
            self.data = {'name' : name, 'age' : age}

        def getData(self, includeNameAge=False):
            if includeNameAge: return self.data
            tmp = <shallow or deep copy of 'data'>
            del tmp['name']
            del tmp['age']
            return tmp

       The getdata method should return the data stored for the
person, however, it should be able to return the data excluding the
'name' and 'age'.  Any suggestions on how to best implement this?
Keep in mind this sample code is meant to be an example, I realize
that a person would probably always want the name and age returned.

thanks



From aurora00 at gmail.com  Mon Mar 19 20:55:30 2007
From: aurora00 at gmail.com (aurora00 at gmail.com)
Date: 19 Mar 2007 17:55:30 -0700
Subject: Create TarFile using string buffers
In-Reply-To: <mailman.5305.1174342750.32031.python-list@python.org>
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
	<mailman.5305.1174342750.32031.python-list@python.org>
Message-ID: <1174352130.385944.163960@e1g2000hsg.googlegroups.com>

Thanks. It almost works. The problem is I don't know the size of the
file until it has finished streaming. It looks like the tar file
format need the file size written at the beginning :(



From exarkun at divmod.com  Mon Mar 26 11:33:12 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 26 Mar 2007 10:33:12 -0500
Subject: Python object overhead?
In-Reply-To: <bdd6985b0703260813t7db393cau2358a849db610290@mail.gmail.com>
Message-ID: <20070326153312.18920.992110605.divmod.quotient.5680@ohm>

On Mon, 26 Mar 2007 09:13:58 -0600, Matt Garman <matthew.garman at gmail.com> wrote:
>On 3/23/07, Jack Diederich <jackdied at jackdied.com> wrote:
>> If you make the record a new style class (inherit from object) you can
>> specify the __slots__ attribute on the class.  This eliminates the per
>> instance dictionary overhead in exchange for less flexibility.
>
>When you say "new style class", do you mean that the __slots__ feature
>is only available in a newer version of Python?  Unfortunately, I'm
>stuck on 2.3.4 for this project.

A new-style class is one which has a type of type instead of ClassType.
For example:

  >>> class notnewstyle:
  ...     pass
  ...
  >>> type(notnewstyle)
  <type 'classobj'>
  >>> class newstyle(object):
  ...     pass
  ...
  >>> type(newstyle)
  <type 'type'>
  >>> class alsonewstyle(list):
  ...     pass
  ...
  >>> type(alsonewstyle)
  <type 'type'>
  >>>

2.3 has new-style classes.

Jean-Paul


From kyosohma at gmail.com  Fri Mar 30 12:04:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 09:04:35 -0700
Subject: New to Python - Easy way to open a text file
In-Reply-To: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
Message-ID: <1175270675.296617.83380@e65g2000hsc.googlegroups.com>

On Mar 30, 10:49 am, "Max Steel" <maxst... at gmail.com> wrote:
> Hey gang, I'm new to python coding.  I'm trying to find the simplest way to
> open a text file (on the same server) and display it's content.
>
> The text file is plain text (no markup language of any kind).
>
> The filename gets found and placed into a variable named [plainfiles.href]
>
> I'm using python to find the text files, and a .ezt template to display the
> list of the files.  But I can't figure out how to read the contents of the
> file, and display it within the same template.
>
> Any help is appreciated.
>
> Thanks in advance,
> .\\axSteel

I'm not familiar with ezt formats, however reading a text file is a
breeze.

f = open(r'pathToFile')
while True:
	line = f.readline()
	if not line: break
	# do something with the line of text such as print it.

f.close()


I suppose you could write it to .ezt? Maybe you need to format each
line before inserting it. I hope this points you in the right
direction anyway.

Mike



From jqdkf at science.nus.edu.sg  Thu Mar 22 04:37:56 2007
From: jqdkf at science.nus.edu.sg (Zeng Nan)
Date: Thu, 22 Mar 2007 16:37:56 +0800
Subject: Regexp problem with `('
In-Reply-To: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
References: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
Message-ID: <20070322083756.GA22172@cactus.homeunix.org>

On Thu, Mar 22, 2007 at 01:26:22AM -0700, Johny wrote:
> I have  the following text
> 
> <title>Goods Item  146 (174459989)  - OurWebSite</title>
> 
> from which I need to extract
> `Goods Item  146 '
> 
> Can anyone help with regexp?
> Thank you for help
> L.

(Goods\s+Item\s+146\s+)

-- 
Zeng Nan           

MY BLOG: http://zengnan.blogspot.com
Public Key: http://pgp.mit.edu/ | www.keyserver.net

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In Lexington, Kentucky, it's illegal to carry an ice cream cone in your
pocket.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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From thardy99 at gmail.com  Tue Mar 13 13:05:16 2007
From: thardy99 at gmail.com (Teresa Hardy)
Date: Tue, 13 Mar 2007 10:05:16 -0700
Subject: Server-side script takes way too long to launch
Message-ID: <e0582b0b0703131005q305ddb0dic7fdffd8811aaf22@mail.gmail.com>

I have a webpage calling a python script, using Apache
server....http://localhost/cgi-bin/mycode.py?dmn
I am using Firefox, WindowsXP Python 2.4

I can count to 13 from the time I click to the time the browser finds the
path.

The python runs okay when I finally get to it. In the first step it just
launches a Flash file. I benchmarked the time thru the python code and it
isn't the slow part. It's the launch. Forgive me if I am not explaining this
well. I am pretty much teaching myself...fumbling thru the process.

Any suggestions on how to speed up the first step?

Thanks,
Teresa
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From steve at REMOVE.THIS.cybersource.com.au  Tue Mar  6 08:51:33 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 07 Mar 2007 00:51:33 +1100
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
	<Xns98EA5C051525Cduncanbooth@127.0.0.1>
Message-ID: <pan.2007.03.06.13.51.30.573793@REMOVE.THIS.cybersource.com.au>

On Mon, 05 Mar 2007 09:02:44 +0000, Duncan Booth wrote:

> Try running it interactively and looking at the data you receive:
> 
>>>> conn = HTTPConnection('xml.showmyip.com')
>>>> conn.request('GET', '/')
> 
>>>> resp = conn.getresponse()
>>>> print resp
> <httplib.HTTPResponse instance at 0x00C58350>
>>>> data = resp.read()
>>>> print data
> <html><head><title>Object moved</title></head><body>
> 
> <h2>Object moved to <a href="http://www.showmyip.com/xml/">here</a>.
> </h2>
> 
> </body></html>

Ah! That's the clue I needed -- thanks.

> If you try connecting to 'www.showmyip.com' and requesting '/xml/' it 
> should work.

Thank you muchly! That seems to do the trick.


-- 
Steven.



From timm.gloger at gmail.com  Thu Mar  1 17:29:48 2007
From: timm.gloger at gmail.com (timm.gloger at gmail.com)
Date: 1 Mar 2007 14:29:48 -0800
Subject: Unpacking problem
In-Reply-To: <1172783865.479377.42790@h3g2000cwc.googlegroups.com>
References: <1172783865.479377.42790@h3g2000cwc.googlegroups.com>
Message-ID: <1172788187.562316.194140@j27g2000cwj.googlegroups.com>

The problem is, that len('\x90\x06\x00') is not equivalent to
calcsize('Bh'):
>>> calcsize('Bh')
4
>>> len('\x90\x06\x00')
3

Actually calculating the size for 'hB' results in:
>>> calcsize('hB')
3

So far I have not figured out, why there is an additional byte, but it
does not effect the result in any way. (Or I simply did not insert any
byte that would cause an effect.)

So
>>> unpack('Bh', '\x90\x??\x06\x00')
(144,6)

with ?? as any valid hex, gives the "correct" result, but I dont know
why either.

On Mar 1, 10:17 pm, "Chris Garland" <chrisgarlan... at gmail.com> wrote:
> What's wrong here?
>
> >>> from struct import unpack
>
> I can unpack an unsigned char>>> unpack('B','\x90')
>
> (144,)
>
> I can unpack a short>>> unpack('h','\x06\x00')
>
> (6,)
>
> But an unsigned char & a short give me this>>> unpack('Bh','\x90\x06\x00')
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> struct.error: unpack str size does not match format
>
>




From hipertracker at gmail.com  Mon Mar 26 19:47:22 2007
From: hipertracker at gmail.com (Jaroslaw Zabiello)
Date: Tue, 27 Mar 2007 00:47:22 +0100
Subject: ZSI, SOAP and .NET web services - problem
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
	<slrnf0g9u4.jo9.dek@oliver.lbl.gov>
Message-ID: <j3yu411c2ifw$.dlg@zabiello.com>

Dnia Mon, 26 Mar 2007 20:06:28 +0000 (UTC), David E. Konerding DSD staff
napisa?(a):

> Try fixing your WSDL, then try again.

The problem is I see no errors in my WSDL. Pythonic implementation of SOAP
is just crapy.

-- 
Jaroslaw Zabiello
http://blog.zabiello.com


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 31 21:31:31 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 01 Apr 2007 03:31:31 +0200
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
Message-ID: <578gbhF2b61kkU1@mid.individual.net>

Luis M. Gonz?lez wrote:

> I think he should be taken very seriously.

Agreed.

Okay, it seems focusing a discussion on one single point is
difficult for many people. Next time I'll be mind-bogglingly clear
that even the last one understands after reading it one time ...
 
Regards,


Bj?rn

Fup2 p

-- 
BOFH excuse #46:

waste water tank overflowed onto computer



From john.pye at gmail.com  Thu Mar 22 20:59:05 2007
From: john.pye at gmail.com (John Pye)
Date: 22 Mar 2007 17:59:05 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <eLEMh.20201$6.10662@tornado.fastwebnet.it>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
	<1174529579.990955.116390@l77g2000hsb.googlegroups.com>
	<R1rMh.18272$6.13299@tornado.fastwebnet.it>
	<1174574095.731406.318790@l77g2000hsb.googlegroups.com>
	<eLEMh.20201$6.10662@tornado.fastwebnet.it>
Message-ID: <1174611545.176636.283560@o5g2000hsb.googlegroups.com>

On Mar 23, 10:59 am, Giovanni Bajo <n... at ask.me> wrote:
> On 22/03/2007 15.34, John Pye wrote:
>
> > I downloaded your package and installed it in c:/mingw1. It complained
> > that it could not detect Python, although I have Python 2.4 installed
> > on my system (did you check HKCU as well as HKLM, perhaps?)
>
> Ewwww you're totally right! I'll have that fixed!

Great. I'll be looking out for a bugfix release very shortly then ;-)

>
> > I note that the gccmrt utility does not work from MSYS. You will need
> > to provide a shell-script equivalent version, in order for that to be
> > useful for MSYS users. So I opened a cmd prompt and ran the command,
> > then restarted my MSYS session.
>
> Yes, I don't use MSYS. I'll attempt something... any idea how to ship both
> versions and still having the right one picked up depending on which shell
> you're using? Maybe it's just a matter of extensions?

Yes, just add a file 'gccmrt' with no extension, and put '#!/bin/sh'
in the first line, I'd say. And then whatever the script actually
needs to do -- hopefully it's pretty simple. If you need to be
tweaking the registry perhaps it would be better to just write a
little binary .exe that can be used both my cmd and sh users.

>
>  > There is also a need to be able to
>
> > query the *current state* of the gccmrt option.
>
> Right, I'll add that.

Great, that would be a help.

>
> > Next I built my code. It all compiled OK, all the way through to my
> > NSIS bundle. So that was nice. It includes gfortran, flex, bison, SWIG/
> > Python and Tcl/Tk linkage: a bit of a coup.
>
> > BUT when I try to run my program, I get a windows error msgbox,
> > "python.exe - Entry Point Not Found: The procedure entry point _ctype
> > could not be located in the dynamic link library msvcr71.dll".
>
> In msvcrt71.dll, there is no _ctype (see declaration at line 111 of
> include\ctype.h). There is only _pctype. What if you comment the declaration
> at line 111? I wonder what it's bringing in _ctype.
>
> Anyway, it looks like mingw-runtime does not support this _ctype change
> between mscvrt.dll and msvcr71.dll. These changes should probably be
> represented in the forms of #ifs checking __MSVCRT_VERSION__. I'm not even
> sure that __MSVCRT_VERSION__ is being set correctly.. that is something gccmrt
> should eventually take care of, but for this specific _ctype problem you
> probably need to submit a patch to mingw-runtime.
>
> I can guide you through it though... I don't have much time in these days though.

Sorry, I'm not clear on this and will need a bit more help. I'm not
even sure where this _ctype dependency could be coming from -- do you
have any ideas?

Are you saying that I can't make your GCC tools work until the MinGW
runtime is patched?

Cheers
JP



From bignose+hates-spam at benfinney.id.au  Thu Mar  8 16:08:29 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 Mar 2007 08:08:29 +1100
Subject: Where to "import"?
References: <1173379952.901004@iceman.esoterica.pt>
Message-ID: <87zm6nxx2q.fsf@benfinney.id.au>

Paulo da Silva <psdasilvaX at esotericaX.ptX> writes:

> Hi!
>
> If I have two files .py such as
>
> m.py
> 	from c import *

Best done as either

    import c    # then use 'x = c.c()'

or

    from c import c

Using 'from foo import *' leads to names appearing in your current
namespace that are difficult to track to their origin by reading the
source code.

> both using os module where should I put the "import os"? In both
> files?

Yes. "import os" does two things of note:

  - iff the module is not currently loaded and executed, do so
  - bind the module object to the name "os" in the current namespace

The first step means that you're not losing anything by importing the
module wherever it's needed. The second means the module is available
for use within the current namespace.

-- 
 \              "When cryptography is outlawed, bayl bhgynjf jvyy unir |
  `\                                           cevinpl."  -- Anonymous |
_o__)                                                                  |
Ben Finney



From tomer.ha at gmail.com  Sat Mar 31 18:30:41 2007
From: tomer.ha at gmail.com (tomer.ha at gmail.com)
Date: 31 Mar 2007 15:30:41 -0700
Subject: Using Simple MAPI with MS Outlook 2007
Message-ID: <1175380241.373052.267110@b75g2000hsg.googlegroups.com>

Hi there,

I'd like to send emails from a Python program using Simple MAPI. I've
tried this code: http://mail.python.org/pipermail/python-list/2004-December/298066.html
and it works well with Outlook Express 6 and Thunderbird 1.5, but it
doens't work at all with Microsoft Outlook 2007. I keep getting this
message: "WindowsError: MAPI error 2".

I don't want to use Extended MAPI because it doesn't support
thunderbird not OE. Therefore, Simple MAPI is the only option for me.

So, what did I miss here?



From bearophileHUGS at lycos.com  Thu Mar  1 04:07:42 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 1 Mar 2007 01:07:42 -0800
Subject: quickly read a formated file?
In-Reply-To: <mailman.4556.1172736249.32031.python-list@python.org>
References: <mailman.4556.1172736249.32031.python-list@python.org>
Message-ID: <1172740062.523000.209320@8g2000cwh.googlegroups.com>

lialie:
> The formated file may be very popularly, but the module ConfigPaser
> doesn't handle it. Is there a way to process it freely?

First try, assuming the input file can be read whole. The code isn't
much readable, it needs better variable names (name names?), comments,
etc.

data = """
%HEADER
title1 = "Untilted1"
username = "User1"

%DATA
title2 = "Untilted2"
username2 = "User2"
"""

l1 = (p.strip().splitlines() for p in data.split("%") if p.strip())
result = {}
for part in l1:
    pairs1 = (pair.split('=') for pair in part[1:])
    pairs2 = ((k.strip(), v.strip().strip('"')) for k,v in pairs1)
    result[part[0]] = dict(pairs2)
print result


All done lazily for your better comfort :-)

Bye,
bearophile



From gagsl-py2 at yahoo.com.ar  Tue Mar 13 03:05:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 04:05:04 -0300
Subject: Starting Python... some questions
References: <845401.48808.qm@web58115.mail.re3.yahoo.com>
Message-ID: <op.to38mqiox6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 03:13:37 -0300, jezzzz . <jezonthenet at yahoo.com>  
escribi?:

> I added the self parameter to the the chassis_id function, however I now  
> have a problem and question regarding encoding MAC addresses for a  
> struct. What string format am I supposed to use?

py> data = [int(x,16) for x in "2A:3B:01:9C:04:F0".split(":")]
py> print data
[42, 59, 1, 156, 4, 240]
py> struct.pack("6B", *data)
'*;\x01\x9c\x04\xf0'

That is: take the string "2A:3B:01:9C:04:F0", split it in parts at each  
":", iterate over them converting from hex to integer; the resulting list  
is called data.
Then, pack the numbers using "6B" format.

> Also, I think I will get rid of Scapy in my small program. Any  
> references I can use to easily send (no need to receive) a packet with a  
> Layer 1 and 2 only? (i.e. only Ethernet and LLDP - no need for IP, UDP,  
> TCP etc. I wish to create something like Ethernet | LLDP msg1 | LLDP  
> msg2 | ... | LLDP msgn)

I don't think you can do that with Python alone - that is, without using  
some other specific tool like scapy.

> class lldp_class:

Usually classes have UppercaseWords, and omit the word "class".
But since LLDP would be all uppercase, maybe another name would be better.
You appear to be storing just a few attributes, not implementing that  
protocol, so maybe LLDPInfo might be used.

>     def chassis_id(self, subtype, chassis_info):
>
>         if subtype == 4:
>
>             chassis_data = struct.pack("!B",chassis_info)
>
>         subtype_data = struct.pack("!B",subtype)
>
>         self.chassis_id_tlv = subtype_data + chassis_data

What should happen when subtipe is not 4? (Currently you get an error).

-- 
Gabriel Genellina



From codecraig at gmail.com  Tue Mar 20 10:14:01 2007
From: codecraig at gmail.com (abcd)
Date: 20 Mar 2007 07:14:01 -0700
Subject: help - Module needs access to another module
In-Reply-To: <56a7j9F28bl1sU2@mid.uni-berlin.de>
References: <1174398386.976864.109350@p15g2000hsd.googlegroups.com>
	<56a7j9F28bl1sU2@mid.uni-berlin.de>
Message-ID: <1174400041.278036.183940@p15g2000hsd.googlegroups.com>

On Mar 20, 9:58 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> After a bunch of questions of that kind, I suggest you take a step back, and
> read this:
>
> http://docs.python.org/tut/node8.html


got it, thanks.



From gagsl-py2 at yahoo.com.ar  Tue Mar 13 16:01:43 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 17:01:43 -0300
Subject: Single string print statements on multiple lines.
References: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
	<1173727915.911896.136890@t69g2000cwt.googlegroups.com>
	<45f68b7a$0$23627$426a74cc@news.free.fr>
Message-ID: <op.to48k5arx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 08:31:17 -0300, Bruno Desthuilliers  
<bruno.42.desthuilliers at wtf.websiteburo.oops.com> escribi?:

> Obviously, the OP is not trying to cheat (explicitelt
> aknowledging it is homework), and has a good enough understanding of
> what the usual solution is (asking for the escape char in Python).
>
> Now of course the answer is in the FineManual(tm), which implies that
> either the OP failed to read it, or that the FineManual is not so fine -
> but that's another problem.

If the FineManual(tm) is the Tutorial, it only explain escape sequences  
minimally, presuming some prior knowledge on the reader. For users with  
previous experience in different languages (like VB or Delphi) using \n is  
rather strange.

-- 
Gabriel Genellina



From http  Wed Mar 28 10:34:00 2007
From: http (Paul Rubin)
Date: 28 Mar 2007 07:34:00 -0700
Subject: PyPy 1.0: JIT compilers for free and more
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
Message-ID: <7xk5x1a147.fsf@ruckus.brouhaha.com>

"Kay Schluehr" <kay.schluehr at gmx.net> writes:
> A somewhat unrelated question. With Py3K Python gets optional type
> annotations. Are you already architecting an annotation handler that
> can process these annotations? This feature is somewhat competitive to
> all the complicated type inference and jitting you have been worked
> out so I don't know how it fits well into the current PyPy
> architecture?

What's the nature of the conflict between annotations and inference?
Haskell for example has both.


From gigs at hi.t-com.hr  Fri Mar  2 10:17:32 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 02 Mar 2007 16:17:32 +0100
Subject: tkinter what do you use?
Message-ID: <es9f6i$660$1@ss408.t-com.hr>

list = Listbox()
list.insert('end', x)
list.insert(END, x)


what do you use 'end' or END?


From hg at nospam.org  Thu Mar 15 07:46:07 2007
From: hg at nospam.org (hg)
Date: Thu, 15 Mar 2007 12:46:07 +0100
Subject: logging and wx.Timer
References: <gdSJh.6304$Ng1.1551@newsfe19.lga>
	<1173890343.427588.285370@l77g2000hsb.googlegroups.com>
	<lRWJh.60$0K1.38@newsfe21.lga>
Message-ID: <OCfKh.74888$Ju2.3744@newsfe16.lga>

hg wrote:

> Jordan wrote:
> 
>> On Mar 14, 1:52 am, hg <h... at nospam.org> wrote:
>>> Hi,
>>>
>>> I read that logging was thread safe ... but can I use it under a GUI
>>> timer ?
>>>
>>> Thanks,
>>>
>>> hg
>> 
>> That was barely enough information to be worthy of a reply.  Need more
>> than that.  What do you mean under a gui timer? What gui? What type of
>> usage? More info = more (and better) help.  Cheers.
>> 
>> JT
> 
> Twas in the title: wx.timer
> 
> REgards,
> 
> hg


FYI, the answer from the wxPython NG is yes ... it should work fine

hg



From bj_666 at gmx.net  Fri Mar  9 16:29:07 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 09 Mar 2007 22:29:07 +0100
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
Message-ID: <pan.2007.03.09.21.29.07.201983@gmx.net>

In <1173475520.292989.239200 at p10g2000cwp.googlegroups.com>, israphelr
wrote:

> So I created a program, that gets a string from a user and then prints
> the string in reverse order.

In [57]: 'reversed string'[::-1]
Out[57]: 'gnirts desrever'

Ciao,
	Marc 'BlackJack' Rintsch


From damobyrne2002 at hotmail.com  Tue Mar 20 11:32:32 2007
From: damobyrne2002 at hotmail.com (Damien Byrne)
Date: Tue, 20 Mar 2007 15:32:32 +0000
Subject: os.wait() for Windows
Message-ID: <BAY12-F15B7FF8113C9A4BE6352ECAA750@phx.gbl>

Hello,

I am new to python. I am using the os module to run a command in a 
bashshell. However I need this process to complete before continuing. Is 
there a command that will wait for this process to complete? I am using 
Windows XP and the os.wait() command only works for UNIX systems, and 
therefore doesn't work.

My code is as follows:

import os
FileName = raw_input('Enter the file name: ')
os.system('abaqus job=FileName')
resultsFile = open('FileName.dat','r')

Abaqus will take a few minutes to complete and create the associated results 
file. However once I run this code I get the following error ... "IOError: 
[Errno 2] No such file or directory: 'FileName.dat'" ... as the file does 
not exist yet. Is there any way of waiting for the job to complete before 
continuing?

I'd appreciate any help.

_________________________________________________________________
Share folders without harming wildlife! 
http://www.communicationevolved.com/en-ie/



From arnodel at googlemail.com  Tue Mar  6 14:44:48 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 6 Mar 2007 11:44:48 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173121140.087027.214600@h3g2000cwc.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
	<1173105492.632821.326810@n33g2000cwc.googlegroups.com>
	<1173121140.087027.214600@h3g2000cwc.googlegroups.com>
Message-ID: <1173210288.178790.233730@64g2000cwx.googlegroups.com>

On 5 Mar, 18:59, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
[snip]
> Well in fact I couldn't help but try to improve it a bit. Objects now
> don't need a callerclass attribute, instead all necessary info is
> stored in a global __callerclass__. Bits that didn't work now do.

OK that wasn't really thought through. Because I changed the design
mid-way through writing it __callerclass__ wasn't doing the right
thing. I've sorted the issues I could see and made it (hopefully)
thread-safe. I'm not going to pollute this list again with my code so
I've put it at the following address:

http://marooned.org.uk/local.py

The problem is that all normal functions need to be decorated with
'@function' for it to work completely: if I understand correctly the
snippet below should raise an exception.  It only does so if 'f' is
decorated with '@function' as below.

----------
@function
def f(x):
    x.l()

class C(Object):
    @localmethod
    def l(self):
        print "Shouldn't get here"
    def v(self):
        return f(self)

C().v() # Raises LocalMethod exception
----------

PS: in fact I'm not sure it's a good idea to decorate local methods:
what about local attributes which are not methods? They have to be
treated differently as only functions can be decorated.

What about functions / classes which are local to a module?

--
Arnaud




From steve at holdenweb.com  Tue Mar 20 12:55:20 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 20 Mar 2007 12:55:20 -0400
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
Message-ID: <etp3ob$efb$1@sea.gmane.org>

rh0dium wrote:
> Hi Folks,
> 
> OK I love the logging module.  I use it everywhere.  I was happily
> putting at the top of each of my scripts
> 
> ------<snip>------
> #!/usr/bin/env python2.4
> 
[...]
> 
> But now you guys continued to make this cool language and 2.5 came
> out. Great now how do I put /usr/bin/env python>2.4?
> 
> Or can you suggest a better way to skin this cat?
> 
> Thanks again!!
> 
The usual way is something like

#!/usr/bin/env python

Python usually installs so the latest version gets linked as 
/usr/bin/python. HTere's no need to bind your scripts to a particular 
version.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From gagsl-py2 at yahoo.com.ar  Thu Mar 15 19:38:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 20:38:22 -0300
Subject: lock problem
References: <hiqoc4-fnq.ln1@www.researchut.com>
Message-ID: <op.to87x8mpx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 Mar 2007 18:31:29 -0300, Ritesh Raj Sarraf <rrs at researchut.com>  
escribi?:

> I'm not sure if there's something wrong in the code mentioned above or  
> is it
> really a lock problem.

Try to break the code into smaller pieces to see what is wrong. It's too  
long for somebody to try to understand it.

-- 
Gabriel Genellina



From mark at agtechnical.co.uk  Sun Mar 25 20:23:54 2007
From: mark at agtechnical.co.uk (Mark Crowther)
Date: 25 Mar 2007 17:23:54 -0700
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
In-Reply-To: <mailman.5605.1174863942.32031.python-list@python.org>
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
	<874po95hz5.fsf@gmail.com>
	<1174862657.151504.136350@b75g2000hsg.googlegroups.com>
	<mailman.5605.1174863942.32031.python-list@python.org>
Message-ID: <1174868634.861878.209850@n59g2000hsh.googlegroups.com>

Yep, I agree! once I've got this done I'll be back to trawling the
tutorials.
Life never gives you the convenience of learning something fully
before having to apply what you have learnt ;]

Thanks for the feedback and links, I'll be sure to check those out.

Mark.

On Mar 26, 12:05 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Sun, 25 Mar 2007 19:44:17 -0300, <m... at agtechnical.co.uk> escribi?:
>
>
>
>
>
> > from BeautifulSoup import BeautifulSoup
> > import re
>
> > page = open("soup_test/tomatoandcream.html", 'r')
> > soup = BeautifulSoup(page)
>
> > myTagSearch = str(soup.findAll('h2'))
>
> > myFile = open('Soup_Results.html', 'w')
> > myFile.write(myTagSearch)
> > myFile.close()
>
> > del myTagSearch
> > ...............................
>
> > Firstly, I'm getting the following character: "[" at the start, "]" at
> > the end of the code. Along with "," in between each tag line listing.
> > This seems like normal behaviour but I can't find the way to strip
> > them out.
>
> findAll() returns a list. You convert the list to its string  
> representation, using str(...), and that's the way lists look like: with  
> [] around, and commas separating elements. If you don't like that, don't  
> use str(some_list).
> Do you like an item by line? Use "\n".join(myTagSearch) (remember to strip  
> the str() around findAll)
> Do you like comma separated items? Use ",".join(myTagSearch)
> Read about lists herehttp://docs.python.org/lib/typesseq.htmland strings  
> herehttp://docs.python.org/lib/string-methods.html
>
> For the remaining questions, I strongly suggest reading the Python  
> Tutorial (or any other book like Dive into Python). You should grasp some  
> basic knowledge of the language at least, before trying to use other tools  
> like BeautifulSoup; it's too much for a single step.
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -




From gabor.urban at siemens.com  Wed Mar 28 03:55:33 2007
From: gabor.urban at siemens.com (Urban, Gabor)
Date: Wed, 28 Mar 2007 09:55:33 +0200
Subject: XML Parsing
Message-ID: <38F58D7B92CB20438DF49D28B572CC6FE3B382@budgw09a.ww300.siemens.net>

HI,
 
I could suggest you to use the minidom xml parser from xml module. Your
XML schema does not seem to complocated. You will find detailed
descriptions, and working code in the book: Dive ino Python. Google for
it :-))
 

Gabor Urban
NMC - ART 

 
-------------- next part --------------
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From steve at holdenweb.com  Tue Mar 20 07:37:21 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 20 Mar 2007 07:37:21 -0400
Subject: Load three different modules which have the same name
In-Reply-To: <1174387253.412138.124830@d57g2000hsg.googlegroups.com>
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>	<mailman.5300.1174338208.32031.python-list@python.org>
	<1174387253.412138.124830@d57g2000hsg.googlegroups.com>
Message-ID: <etoh42$tpa$2@sea.gmane.org>

abcd wrote:
>> Blerch! Why not just call the modules by the right names in the first
>> place? Then each will have its own sys.modules entry for a start ...
>>
>> regards
>>   Steve
> 
> what do i need to do?  also, is there a way I can load each one as I
> have but each one have its own unique entry in sys.modules?  For
> example i could load Person from Person (in alpha) as, "Person_Alpha"
> or something like that in sys.modules?  not sure how I might do that.
> 
> Thanks!
> 
The easiest way to proceed is simply to call the .py files by different 
names - then they automatically get theor own sys.modules entry.

[sys.modules is a dictionary where you can look modules up by name. it's 
helpful to ensure each module gets its own entry, and the presence of 
the entry is how the system avoids unnecessary reloading of modules].

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From aleax at mac.com  Sun Mar 11 21:59:43 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 18:59:43 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<7xps7f5ptp.fsf@ruckus.brouhaha.com>
Message-ID: <1hutrb3.e1sbu5kvxk8nN%aleax@mac.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> (rejected) for Python to support exact rational arithmetic in addition
> to floating point and exact integer arithmetic.  Exact rationals in
> Python (if implemented) should behave like mathematical rationals.
> But Python floating point arithmetic should follow IEEE 754, at least
> when the hardware supports it, which these days is almost always.

Incidentally (and I know you know that, Paul, but others interested in
this thread might not) fast exact rational arithmetic (based on the LGPL
library named GMP) is supplied, among other functionality, by module
gmpy, currently found at http://code.google.com/p/gmpy/ (this version is
more recent than the older one at sourceforce, which for some reason
doesn't let me update things right any more).


Alex


From tiedon_jano at hotmail.com  Thu Mar  1 09:09:31 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Thu, 01 Mar 2007 14:09:31 GMT
Subject: quickly read a formated file?
In-Reply-To: <Xns98E6461AA4247rzantowgmailcom@208.49.80.253>
References: <mailman.4556.1172736249.32031.python-list@python.org>
	<1172740062.523000.209320@8g2000cwh.googlegroups.com>
	<Xns98E6461AA4247rzantowgmailcom@208.49.80.253>
Message-ID: <v8BFh.137$HB5.13@read3.inet.fi>

rzed kirjoitti:
> bearophileHUGS at lycos.com wrote in
> news:1172740062.523000.209320 at 8g2000cwh.googlegroups.com: 
> 
>> lialie:
>>> The formated file may be very popularly, but the module
>>> ConfigPaser doesn't handle it. Is there a way to process it
>>> freely? 
>> First try, assuming the input file can be read whole. The code
>> isn't much readable, it needs better variable names (name
>> names?), comments, etc.
>>
>> data = """
>> %HEADER
>> title1 = "Untilted1"
>> username = "User1"
>>
>> %DATA
>> title2 = "Untilted2"
>> username2 = "User2"
>> """
>>
>> l1 = (p.strip().splitlines() for p in data.split("%") if
>> p.strip()) result = {}
>> for part in l1:
>>     pairs1 = (pair.split('=') for pair in part[1:])
>>     pairs2 = ((k.strip(), v.strip().strip('"')) for k,v in 
> pairs1) result[part[0]] = dict(pairs2)
>> print result
>>
>>
> 
> If there could be embedded perecent signs in the data, that will 
> produce some unexpected results, though. Here's another shot:
> 
> 
> <snip>
> 
> 

The solution of bearophile only needs 2 small modifications to handle this:

#=========================================
data = """
%HEADER
title1 = "Untilted1"
username = "User1 20 %"

%DATA
title2 = "Untilted2"
username2 = "User2 10 %"
"""

# Ensure data starts with a newline
data = '\n' + data

# Split using '\n%' instead of '%'
l1 = (p.strip().splitlines() for p in data.split("\n%") if p.strip())
result = {}
for part in l1:
     pairs1 = (pair.split('=') for pair in part[1:])
     pairs2 = ((k.strip(), v.strip().strip('"')) for k,v in pairs1)
     result[part[0]] = dict(pairs2)
print result
#=========================================



Cheers,
Jussi


From bignose+hates-spam at benfinney.id.au  Sat Mar  3 02:49:10 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 Mar 2007 18:49:10 +1100
Subject: Perl and Python, a practical side-by-side example.
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45e8c931$0$8646$426a34cc@news.free.fr>
	<54sl5dF21mn73U1@mid.individual.net>
Message-ID: <87y7me22dl.fsf@benfinney.id.au>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:

> Bruno Desthuilliers wrote:
> > Shawn Milo a ?crit :
>
> >>     if recs.has_key(piid) is False:
> > 
> > 'is' is the identity operator - practically, in CPython, it
> > compares memory addresses. You *dont* want to use it here.
>
> It's recommended to use "is None"; why not "is False"? Are there
> multiple False instances or is False generated somehow?

I'd recommend against using "is False" simply because it's more
confusing. This is better::

    if not recs.has_key(piid):      # [1]

Moreover, any 'if' statement expects a boolean expression *anyway*, so
there's no point testing for identity against False. Otherwise, the
following would be just as reasonable::

    if (recs.has_key(piid) is False) is True:

Or perhaps:

    if (((((recs.has_key(piid) is False) is True) is False) is False) is True):


[1]: yes, this is even better written as 'if not piid in recs', but
that's beside the point for this discussion.

-- 
 \                                          "To be is to do"  -- Plato |
  `\                                    "To do is to be"  -- Aristotle |
_o__)                                     "Do be do be do"  -- Sinatra |
Ben Finney



From steven.bethard at gmail.com  Thu Mar  1 11:01:36 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 01 Mar 2007 09:01:36 -0700
Subject: class declaration shortcut
In-Reply-To: <1172748388.475530.57570@k78g2000cwa.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
Message-ID: <YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>

Arnaud Delobelle wrote:
> On Feb 28, 7:26 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
>> I've come across a code snippet inwww.rubyclr.comwhere they show how
>> easy it is to declare a class compared to equivalent code in c#.
>> I wonder if there is any way to emulate this in Python.
>>
>> The code is as follows:
>>
>> Person = struct.new( :name, :birthday, :children)
>>
>> I tried something like this, but it's nothing close to what I'd like:
>>
>> def klass(table, *args):
>>         cls = new.classobj(table, (), {})
>>         for i in args:
>>                 setattr(cls, i, i)
>>         return cls
>>
>> But this above is not what I want.
>> I guess I should find a way to include the constructor code inside
>> this function, but I don't know if this is possible.
>> Also, I wonder if there is a way to use the variable name in order to
>> create a class with the same name (as in "Person"above).
>>
>> Well, if anyone has an idea, I'd like to know...
>>
>> Luis
> 
> Perhaps something like:
> 
> class Struct(object):
>     def __init__(self, **vals):
>         for slot, val in vals.iteritems():
>             setattr(self, slot, val)
>     def __repr__(self):
>         return "%s(%s)" % (type(self).__name__,
>             ", ".join("%s=%s" % (slot, repr(getattr(self, slot))) for
> slot in self.__slots__ if hasattr(self, slot)))
> 
> def new_struct(name, *slots):
>     return type(name, (Struct,), {'__slots__': slots})
> 
> 
> Then you can do:
> 
>>>> Point = new_struct('Point', 'x', 'y')
>>>> p=Point(x=1, y=2)
>>>> p
> Point(x=1, y=2)
>>>> p.x
> 1
>>>> p.y
> 2
>>>> p.x=7
>>>> p
> Point(x=7, y=2)
>>>> Person = new_struct('Person', 'name', 'tel', 'email')
>>>> jack = Person(name='Jack')
>>>> jack
> Person(name='Jack')
>>>> jack.tel='555-132'
>>>> jack
> Person(name='Jack', tel='555-132')

This does pretty much the same thing as the recipe I posted:

     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237

Note that your approach requires repetition of the 'Person' and quotes 
around each attribute name, which the OP complained about. The recipe at 
least gets rid of the repetition of 'Person'.

You might also want to check out Raymond Hettinger's NamedTuple recipe:

     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/500261

STeVe


From aisaac at american.edu  Tue Mar  6 23:00:33 2007
From: aisaac at american.edu (Alan Isaac)
Date: Wed, 07 Mar 2007 04:00:33 GMT
Subject: arenable in Python
Message-ID: <BNqHh.4892$kh.2923@trnddc06>

Is the functionality of arenable
http://sourceforge.net/projects/arenable/
available as a Python project?
(It enables commenting features in Reader.)

I am assuming the legitimacy of the arenable project.
Correct me if I am wrong.

Thanks,
Alan Isaac




From bhell at spamfence.net  Fri Mar 23 06:47:35 2007
From: bhell at spamfence.net (Benjamin Hell)
Date: Fri, 23 Mar 2007 11:47:35 +0100
Subject: Need help to learn Python
In-Reply-To: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
References: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
Message-ID: <56hpioF29hiqjU1@mid.individual.net>

Hi!

PythonBiter wrote:
> I'm very new in this Group as well Python language. I want to learn
> Python. So could you please advice me, and guide me how can i become
> master in Python !

If you are new to programming in general, too, the "Non-Programmer's
Tutorial for Python" is a good start:

http://en.wikibooks.org/wiki/Non-Programmer%27s_Tutorial_for_Python


Cheers,

Ben


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 00:33:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 01:33:29 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
Message-ID: <op.tpmj93tix6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 03:35:09 -0300, John Pye <john.pye at gmail.com> escribi?:

> Gabriel, if you think you can make an example that works, that would
> be great. I'm afraid I feel a bit out of my depth and don't have much
> confidence in this idea.

Try this. It's based on the example_nt extension module.

--- begin example.c ---
#include <io.h>
#include <fcntl.h>
#include <stdio.h>
#include <windows.h>
#include "Python.h"

static void externalfunction(FILE* f)
{
	// This is a "fake" external function that receives a FILE*
	printf("In externalfunction\n");
	fprintf(f, "Hello from externalfunction!\n");
}

static void wrapper(DWORD osfhandle)
{
	// This is a wrapper around externalfunction; receives an OS handle
	// for an open file, builds a FILE structure, and calls externalfunction
	FILETIME lw;
	SYSTEMTIME st;
	FILE* f;

	// This call is just to show that osfhandle is actually a Windows handle
	// as if one had used CreateFile(...) by example
	printf("Using osfhandle with GetFileTime\n");
	GetFileTime((HANDLE)osfhandle, NULL, NULL, &lw);
	FileTimeToSystemTime(&lw, &st);
	printf("LastWrite %d-%d-%d %02d:%02d:%02d.%03d\n", st.wYear, st.wMonth,  
st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);

	// Now build a FILE struct from the received handle
	f = fdopen(_open_osfhandle(osfhandle,_O_APPEND),"a");
	externalfunction(f);
	fflush(f); // ensure all buffers are written
}

static PyObject *
filetest(PyObject *self, PyObject *args)
{
	DWORD handle;

	if (!PyArg_ParseTuple(args, "I", &handle))
		return NULL;
	printf("Received handle: %d\n", handle);
	wrapper(handle);
	printf("Done\n");
	Py_INCREF(Py_None);
	return Py_None;
}

static PyMethodDef example_methods[] = {
	{"filetest", filetest, 1, "filetest doc string"},
	{NULL, NULL}
};

void
initexample(void)
{
	Py_InitModule("example", example_methods);
}
--- end example.c ---

--- begin test.py ---
f = open("output.txt","w")
f.write("Hello from python!\n")
# ensure all buffers are written before calling the external function
f.flush()

import msvcrt
fh = msvcrt.get_osfhandle(f.fileno())
print "handle=",fh

import example
# calling example.filetest using the OS handle
example.filetest(fh)
f.close()

f = open("output.txt","r")
print "output.txt:"
print f.read()
f.close()
--- test.py ---

Build example.dll and rename it example.pyd; copy test.py to the same  
directory.
Running test.py gives:

C:\APPS\Python24\PYTHON~1.2\TEST_M~1\Release>python24 test.py
handle= 1988
Received handle: 1988
Using osfhandle with GetFileTime
LastWrite 2007-3-23 04:25:08.000
In externalfunction
Done
output.txt:
Hello from python!
Hello from externalfunction!

-- 
Gabriel Genellina



From malaclypse2 at gmail.com  Fri Mar  9 13:10:50 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 9 Mar 2007 13:10:50 -0500
Subject: SQLite3 trapping OperationalError
In-Reply-To: <200703091314.49199.inq1ltd@verizon.net>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<op.tow2n71ux6zn5v@gabriel2.softlabbsas.com.ar>
	<200703091314.49199.inq1ltd@verizon.net>
Message-ID: <16651e80703091010q36ebbdd1u346009436e9e227e@mail.gmail.com>

On 3/9/07, jim-on-linux <inq1ltd at verizon.net> wrote:
> However python 2.5,
> except OperationalError:
> responds with
> "OperationalError" is not defined.

I believe that needs to be spelled
except sqlite3.OperationalError:
    do_something()

-- 
Jerry


From bdesth.quelquechose at free.quelquepart.fr  Fri Mar  2 20:42:16 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 03 Mar 2007 02:42:16 +0100
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <1172882037.600036.201060@n33g2000cwc.googlegroups.com>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<1172882037.600036.201060@n33g2000cwc.googlegroups.com>
Message-ID: <45e8ca95$0$29384$426a74cc@news.free.fr>

John Machin a ?crit :
> On Mar 3, 9:44 am, "Shawn Milo" <S... at Milochik.com> wrote:
> 
(snip)
> 
> [big snip]
> Here is my rewrite in what I regard as idiomatic reasonably-modern
> Python (OMMV of course). 

(snip)

John, I *swear* I didn't read your code before posting my own version !


From aleax at mac.com  Sun Mar 11 21:56:07 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 18:56:07 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<mailman.4949.1173642590.32031.python-list@python.org>
	<1hutpfs.1w9hgwlps8a6oN%aleax@mac.com>
Message-ID: <1hutqn2.xknxto7gk7pN%aleax@mac.com>

Alex Martelli <aleax at mac.com> wrote:
   ...
> Yep, it sure might, if I can make time to act on it:-).

...and I did -- patch 1678668 is right there, brand newm at
<http://sourceforge.net/tracker/index.php> .

I hope it also satisfies the timbot's very reasonable lament about the
bug resurfacing once in a while, since it included one more unittest to
check whether the bug is there (TDD rocks!-). 


Alex


From goodTweetieBird at hotmail.com  Tue Mar 20 14:31:36 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 20 Mar 2007 11:31:36 -0700
Subject: Imports
Message-ID: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>

I am working with a tool called maxQ that generates jython scripts.
The tool runs in

C:\maxq\bin.


Rather than clutter up bin I want to put the scripts and other .py
scripts in

c:\maxq\bin\testScripts.


When doing so the scripts need to import from

c:\maxq\jython, but can't find the modules.


I tried adding c:\maxq\jython to the environment variable pythonpath
but to no avail. Perhaps I missed it in Rossum's tutorial but is there
a std prgrammatic way to specify a module directory?

Could you, would you, recommend a text or another webpage for learning
more (much more) about python?

Thanx,

gtb



From http  Mon Mar 19 21:48:15 2007
From: http (Paul Rubin)
Date: 19 Mar 2007 17:48:15 -0800
Subject: an enumerate question
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
Message-ID: <7xr6rkr8gw.fsf@ruckus.brouhaha.com>

eight02645999 at yahoo.com writes:
> hi
> say i want to enumerate lines of a file
> eg
> for n,l in enumerate(open("file")):
>      # print  next line ie
> 
> is there a way to print out the next line from current line using the
> above?.

I don't understand what you're trying to do.  You mean you're
trying to print all lines except the first one?


From wgwigw at gmail.com  Mon Mar 19 05:28:18 2007
From: wgwigw at gmail.com (momobear)
Date: 19 Mar 2007 02:28:18 -0700
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <Xns98F859E7ECA07duncanbooth@127.0.0.1>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<Xns98F859E7ECA07duncanbooth@127.0.0.1>
Message-ID: <1174296498.932354.17950@d57g2000hsg.googlegroups.com>

On Mar 19, 4:50 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> "momobear" <wgw... at gmail.com> wrote:
> > in C++ language we must initilized a variable first, so there is no
> > such problem, but in python if we don't invoke a.boil(), we will not
> > get self.temp to be initilized, any way to determine if it's initilzed
> > before self.temp be used.
>
> The simplest thing is simply never to attempt to use a variable or an
> attribute until you know that is has been initialized, so initialize all
> variables before using them, and initialize all attributes in the class's
> __init__ method.
>
> If you don't have a suitable value for the attribute until later then just
> start off with None and then you can check for 'a.boil is not None': if you
> forget to check then Python's strong type checking will stop you from using
> the None value in an expression expecting a number (or a string).
>
> For cases where you aren't sure whether an object has a specific attribute
> you can use getattr with 3 arguments:
>
>    if getattr(a, 'boil', 80):
>        ...
>
> If that isn't convenient (or it's a variable rather than an attribute) you
> should fall back on the principle that 'is it better to ask forgiveness
> than permission': i.e. just try to use the value and handle the exception
> which is thrown if it doesn't exist. (If the fallback is to substitute a
> simple value use getattr, if the fallback is complicated or takes a long
> time to calculate use exception handling).
>
> There is also a function 'hasattr' which will tell you whether or not the
> object has the specified attribute, but internally it just calls 'getattr'
> and handles the exception so (IMHO) it is generally best just not to bother
> with 'hasattr'.

thanks for help:), I am puzzled about if I have to use try and except
to determine it. finnal code should like this?
 class coffee:
         def __init__(self):
              '''
              do something here
              '''
         def  boil(self):
               self.temp = 80

a = coffer()
try:
    if a.temp > 60:
        print "it's boiled"
except AttributeError:
    print "it's not boiled"



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 00:56:53 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 02:56:53 -0300
Subject: Python threading
References: <1173374702.195390.90550@s48g2000cws.googlegroups.com>
	<mailman.4832.1173406569.32031.python-list@python.org>
	<1173411535.336766.39230@q40g2000cwq.googlegroups.com>
Message-ID: <op.towqs3ytx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 00:38:55 -0300, <test.07 at gmail.com> escribi?:

> pythoncom.CoUninitialize(), if I am not mistaken, releases a COM
> object (and therefore the memory it uses I assume).

Not exactly. *You* must release the COM object (usually assigning None to  
all references to it). CoUninitialize releases all system resources held  
by the COM application, unloads DLLs, and so; it *may* release all COM  
objects but I'm not sure.

> When the command
> is run (in PythonWin for example), the memory is not released but
> persists for quite a while. Using my watch and the Task Manager in
> Windows I can see that the memory is released approximately 30 seconds
> AFTER I run the pythoncom.CoUninitialize() command is run.

If it is eventually released, you don't have a problem, right?
And, if it will be needed again after a while (when you run the next  
command), it looks better this way.
There are many layers on memory management: the OS manages 4K pages that  
are mapped on the process address space; the C runtime suballocates such  
pages as memory blocks; Python itself has two levels of memory allocation  
(and I don't know the details). It's not easy to know exactly how much  
memory is actually used; I think the Python runtime, once it allocates a  
memory block, never releases it to the OS (remaining as a free block,  
available for further usage).

And in general, DLLs are *not* unloaded as soon as its usage count goes to  
0; there is certain delay. (I don't remember, but I think there is a  
registry key called DLLUnloadTime or something). The idea is to avoid  
removing it from memory just to load it again a few moments later, so the  
unloading is delayed for a few seconds. You may be seeing this effect.

>> What memory do you want to release "right away"?
>
> The memory I want to release is the memory the COM object used (the
> one initialized with the win32com Dispatch command). The "right-away"
> is not much of an issue, but if I can release it before I run each
> command from the COM object that leaks memory, it would be nice.
> Running upwards to 800MBs of RAM for one 500 line python script seems
> a little bit too much for me.

Let's see if I can understand the problem. You run multiple commands on a  
COM object, one after another. The COM object is buggy and leaks some  
memory. You run each command on a separate thread, with a CoInitialize(),  
waiting for completion, and a CoUninitialize() at the end. Memory usage  
grows to 800MB when you invoke each command, but if you wait enough time  
after the thread finalizes, memory usage goes down to normal. After that,  
you run the next command, and so on.
Or do you wait until the whole program finalizes, and 30 seconds after  
that, memory usage drops?

-- 
Gabriel Genellina



From kyosohma at gmail.com  Thu Mar 22 15:55:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 22 Mar 2007 12:55:12 -0700
Subject: Been a while...
In-Reply-To: <1174591377.432674.260650@p15g2000hsd.googlegroups.com>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<mailman.5466.1174580521.32031.python-list@python.org>
	<4602cf0c$0$29743$c3e8da3@news.astraweb.com>
	<1174591377.432674.260650@p15g2000hsd.googlegroups.com>
Message-ID: <1174593312.647601.296590@o5g2000hsb.googlegroups.com>

On Mar 22, 2:22 pm, "alisonken1" <alisonk... at gmail.com> wrote:
> On Mar 22, 11:48 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:
>
> <snip>
>
> > >http://www.pythonchallenge.com
>
> > Ugh, I gave up on that site a long time ago! :)
>
> I got stuck on 34 a couple of months ago and haven't had time to go
> back to it.
>
> Fun challenge.

I've also found converting simple C++ assignments from Computer
Science courses on University websites to be a helpful way to learn a
language. Heck, taking any simple programs in any 4GL language and
converting it to Python is a good exercise for the brain and for
honing your skills.

Mike



From thinker at branda.to  Wed Mar 14 16:08:40 2007
From: thinker at branda.to (Thinker)
Date: Thu, 15 Mar 2007 04:08:40 +0800
Subject: Constructor of object
In-Reply-To: <1173897975.419864.306930@b75g2000hsg.googlegroups.com>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>	<mailman.5097.1173895676.32031.python-list@python.org>
	<1173897975.419864.306930@b75g2000hsg.googlegroups.com>
Message-ID: <45F85648.3020409@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

inline wrote:

> I know it, but i don't want call constructor of parent class - I
> use PyGTK and want to load window from glade file and assign it to
> object, parented gtk.Window:

> #!/usr/bin/env python

> import gtk import gtk.glade

> class HelloWindow (gtk.Window): def __init__(self): xml =
> gtk.glade.XML("hello.glade") xml.signal_autoconnect(self) self =
> xml.get_widget("window")

> window = HelloWindow() window.connect("delete_event",
> gtk.main_quit) window.show_all() gtk.main()

Why don't you just define HelloWindow as a function? It is more simple.
If you want HelloWindow() to return the object from glade, you can
make HelloWindow as a function or
a class with __new__() method, suggested by Sylvain's, that return a
object from glade.

for ex:
def HelloWindow():
......
return xml.get_widget("window")
pass

or
class HelloWindow:
def __init__(self):
pass
def __new__(clz, *args):
........
return xml.get_widget("window")

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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iD8DBQFF+FZH1LDUVnWfY8gRAv/yAKDz6VWmIJkLmQ72UwZLBF/hrHUPPgCePRBq
jSx5PySyDc/pW3SOqZEFM/I=
=T746
-----END PGP SIGNATURE-----



From nobody at invalid.com  Mon Mar 26 12:59:46 2007
From: nobody at invalid.com (Erik Johnson)
Date: Mon, 26 Mar 2007 10:59:46 -0600
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <4607fbf4$1@nntp.zianet.com>


<Nomad.C at gmail.com> wrote in message
news:1174915232.414568.197250 at p15g2000hsd.googlegroups.com...
> OK...
> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??
> Thanks
> Chris

    So, after reading much of animated debate here, I think few would
suggest that Python is going to be faster than FORTRAN when it comes to raw
execution speed. Numeric and SciPy are Python modules that are geared
towards numerical computing and can give substantial performance gians over
plain Python.

    A reasonable approach (which has already been hinted at here), is to try
to have the best of both world by mixing Python and FORTRAN - doing most of
the logic and support code in Python and writing the raw computing routines
in FORTRAN. A reasonable approach might be to simply make your application
work in Python, then use profiling to identify what parts are slowest and
move those parts into a complied language such as FORTRAN or C if overall
performance is not fast enough.  Unless your number crunching project is
truly massive, you may find that Python is a lot faster than you thought and
may be plenty fast enough on it's own.

    So, there is a tradeoff of resources between development time, execution
time, readability, understandability, maintainability, etc.

    psyco is a module I haven't seen mentioned here - I don't know a lot
about it, but have seen substantial increases in performance in what little
I have used it. My understanding is that it produces multiple versions of
functions tuned to particular data types, thus gaining some advantage over
the default, untyped bytecode Python would normally produce. You can think
of it as a JIT compiler for Python (but that's not quite what it is doing).
The home page for that module is here:  http://psyco.sourceforge.net/

Hope that help,
-ej




From psdasilvaX at esotericaX.ptX  Sat Mar 10 12:31:01 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 10 Mar 2007 17:31:01 +0000
Subject: number generator
In-Reply-To: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
Message-ID: <1173547852.666259@jubilee.claranet.pt>

cesco escreveu:
> I have to generate a list of N random numbers (integer) whose sum is
> equal to M. If, for example, I have to generate 5 random numbers whose
> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> simple pattern or function in Python to accomplish that?
> 
> Thanks and regards
> Francesco
> 

May be this is what you want ...
I didn't test it enough ... but seems fine.

from random import randint,shuffle

def GenRInt(m,n):
	"""Generate m positive ints whose sum is n"""
	# Generate a random list
	xl=[randint(1,n-m+1) for i in xrange(m)]
	s=sum(xl)
	if s==n: return xl
	# Adjust each value to make sum==n
	xl=[max(x*n/s,1) for x in xl]
	s=sum(xl)
	if s!=n:
		# Compensate for truncations
		if s>n:
			# s>n is supposed not to occur. Just in case ...
			ixs=filter(lambda x: xl[x]>1,range(m))
			shuffle(ixs)
			for i in ixs[:s-n]: xl[i]-=1
		else:
			ixs=range(m)
			shuffle(ixs)
			for i in ixs[:n-s]: xl[i]+=1
	return xl

# Test it ...

xl=GenRInt(10,50)
print xl,"->",sum(xl)

print

xl=GenRInt(100,10000)
print xl,"->",sum(xl)

print

xl=GenRInt(1000,1000)
print xl,"->",sum(xl)


Regards.
Paulo


From kinch1967 at gmail.com  Sun Mar 25 05:34:41 2007
From: kinch1967 at gmail.com (bullockbefriending bard)
Date: 25 Mar 2007 02:34:41 -0700
Subject: List comprehension returning subclassed list type?
In-Reply-To: <pan.2007.03.25.08.57.41.947276@REMOVE.THIS.cybersource.com.au>
References: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>
	<pan.2007.03.25.08.57.41.947276@REMOVE.THIS.cybersource.com.au>
Message-ID: <1174815281.086740.202660@l75g2000hse.googlegroups.com>

Thanks! I went with extend and generator expression as I *am* dealing
with rather a lot of data. Now I think I'm going to go on a little
hunt through my code looking for more places where I should replace
list comprehensions with generator expressions - bit of a newbie here.

On Mar 25, 3:57 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> On Sat, 24 Mar 2007 23:43:10 -0700, bullockbefriending bard wrote:
> > z_list = [Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y]
>
> > Of course this just gives me a plain list and no access to the
> > methodsof z_list.
>
> List comprehensions give you a list. If you want to convert that list into
> the type of z_list, you need to do it yourself. Since ZList sub-classes
> from list, probably the easiest way is just:
>
> z_list = ZList([some list comprehension here])
>
> > I could, of course go and write a static method in
> > ZList which takes a plain list of Z objects and returns a ZList.
>
> Yes, that would be one such way. Another way is:
>
> z_list.extend([some list comprehension here])
>
> If you are using a recent enough version of Python, you probably don't
> even need the list comprehension. Just use a generator expression:
>
> z_list.extend(Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y)
>
> That's especially useful if the list of objects is huge, because it avoids
> creating the list twice: once in the list comp, and once as z_list.
>
> --
> Steven.




From pragmatic.python at gmail.com  Sat Mar  3 12:58:31 2007
From: pragmatic.python at gmail.com (Andrew Coffman)
Date: Sat, 03 Mar 2007 09:58:31 -0800
Subject: class attrdict
In-Reply-To: <1hud90j.zf49afwqrk0bN%aleax@mac.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
Message-ID: <45e9b753$0$8983$4c368faf@roadrunner.com>

Could you do something like this?

class attrdict(dict):
     def __getattr__(self, attr):
         if self.has_key(attr):
             return self[attr]
         else:
             message = "'attrdict' object has no attribute '%s'" % attr
             raise AttributeError, message

If you have a dict item with the same name as a method in the class, you 
won't be able to get to it using syntax sugar, though.

It doesn't seem that the syntax sugar saves you much typing anyway 
(a.foo vs. a['foo']), but perhaps it seems nicer in some aesthetic sense.

- Andrew Coffman


Alex Martelli wrote:
> MonkeeSage <MonkeeSage at gmail.com> wrote:
> 
> 
>>On Mar 2, 9:25 pm, a... at mac.com (Alex Martelli) wrote:
>>
>>>The problem is mostly that, given an instance a of attrdict, whether you
>>>can call (e.g.) a.update(foo) depends on whether you ever set
>>>a['update'], making the whole program extremely fragile -- a very high
>>>price to pay for some modest amount of syntax sugar.
>>
>>How about something like...
>>
>>class attrdict(dict):
>>    def __init__(self, *args, **kwargs):
>>        dict.__init__(self, *args, **kwargs)
>>        for k, v in self.items():
>>            dict.__setattr__(self, str(k), v)
>>    def __setitem__(self, k, v):
>>        dict.__setitem__(self, k, v)
>>        dict.__setattr__(self, str(k), v)
>>    __setattr__ = __setitem__
> 
> 
> Same problem: after x=attrdict(), x.update(foo) will work for a while,
> then suddenly stop working after some innocuous loop such as:
>     for bah in yech: x[bah] = 23
> when one of the items in yech just happens to be the word 'update'
> (similar issues with words such as 'get', 'pop', 'clear', etc, etc).
> 
> Miscegenation between attributes and items *inevitably* sucks.
> 
> 
> Alex


From python at hope.cz  Thu Mar 22 04:26:22 2007
From: python at hope.cz (Johny)
Date: 22 Mar 2007 01:26:22 -0700
Subject: Regexp problem with `('
Message-ID: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>

I have  the following text

<title>Goods Item  146 (174459989)  - OurWebSite</title>

from which I need to extract
`Goods Item  146 '

Can anyone help with regexp?
Thank you for help
L.



From tommy.nordgren at comhem.se  Thu Mar 15 13:29:01 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Thu, 15 Mar 2007 18:29:01 +0100
Subject: Passing a FILE* from Python into a MinGW/SWIG module
In-Reply-To: <1173869863.712750.239070@d57g2000hsg.googlegroups.com>
References: <1173869863.712750.239070@d57g2000hsg.googlegroups.com>
Message-ID: <B1C083C9-D693-4910-B0E5-F934C2A83065@comhem.se>


On 14 mar 2007, at 11.57, John Pye wrote:

> Hi all
>
> I understand that I can't hope to pass a FILE* from the Windows
> version of Python into a SWIG module that I've built using MinGW  
> gcc/g+
> +, because apparently the FILE* structure are different and
> incompatible.
>
> Is there an official workaround for this? Presumably I need to
> implement a mingw-compatible version of all the 'file' class in
> Python, eg
>
> import mingw
> import myswigmodule
>
> F1 = mingw.file("newfile.txt","rw")
> F1.write("somestuff")
> F1.seek(0)
> F2 = mingw.tmpfile()
> myswigmodule.dosomething(F1,F2)
> F2.seek(0)
> print F2.read()
>
> Has anyone done this? Is there a better way that doesn't require users
> of my module to adapt? Do I have to use the dreaded MSVS to compile my
> SWIG module?
>
> Cheers
> JP
	Can you get the file descriptor from the FILE *, and use that?

-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
tommy.nordgren at comhem.se





From bdesth.quelquechose at free.quelquepart.fr  Tue Mar 20 17:02:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 20 Mar 2007 22:02:39 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <pan.2007.03.20.12.37.24.575867@REMOVE.THIS.cybersource.com.au>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
	<pan.2007.03.20.12.37.24.575867@REMOVE.THIS.cybersource.com.au>
Message-ID: <4600437b$0$32010$426a34cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Tue, 20 Mar 2007 10:28:10 +0100, Bruno Desthuilliers complained about
> classic classes:
> 
> 
>>>What's wrong with old-style classes?
>>
>>Almost everything. 
> 
> 
> That's rather an exaggeration, don't you think?

Oh, really ?-)


From alisonken1 at gmail.com  Thu Mar 22 15:22:57 2007
From: alisonken1 at gmail.com (alisonken1)
Date: 22 Mar 2007 12:22:57 -0700
Subject: Been a while...
In-Reply-To: <4602cf0c$0$29743$c3e8da3@news.astraweb.com>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<mailman.5466.1174580521.32031.python-list@python.org>
	<4602cf0c$0$29743$c3e8da3@news.astraweb.com>
Message-ID: <1174591377.432674.260650@p15g2000hsd.googlegroups.com>

On Mar 22, 11:48 am, John Salerno <johnj... at NOSPAMgmail.com> wrote:

<snip>


> >http://www.pythonchallenge.com
>
> Ugh, I gave up on that site a long time ago! :)

I got stuck on 34 a couple of months ago and haven't had time to go
back to it.

Fun challenge.



From __peter__ at web.de  Thu Mar 29 14:55:02 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 Mar 2007 20:55:02 +0200
Subject: Any "consumer review generators" available?
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175193198.147869.293260@d57g2000hsg.googlegroups.com>
Message-ID: <euh220$9kj$00$1@news.t-online.com>

Paul McGuire wrote:

> On Mar 29, 1:19 pm, aral... at aol.com wrote:
>> I am looking for a fake consumer review generator that could generate
>> realistic looking reviews for any products, kind of like on amazon.com
>> but generated by Artificial Intelligence. Is there a package available in
>> your favorite programing language... thx alan
> 
> I have a fake supervisor reference generator for job interviews, a
> fake house inspection generator for real estate transactions, and a
> fake parole testimony generator - maybe you could adapt one of them
> (unfortunately, they are written in dissembler).
> 
> -- Paul

OP, please disregard. That was just Paul's fake usenet post generator
kicking in.

Peter


From paul.sijben at xs4all.nl  Tue Mar  6 02:48:27 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Tue, 06 Mar 2007 08:48:27 +0100
Subject: worker thread catching exceptions and putting them in queue
In-Reply-To: <eshiao$1vpe$1@ulysses.news.tiscali.de>
References: <45ec4936$0$323$e4fe514c@news.xs4all.nl>
	<eshiao$1vpe$1@ulysses.news.tiscali.de>
Message-ID: <45ED1CCB.3010802@xs4all.nl>

Stargaming & Diez,

thanks very much!

Stargaming wrote:
> Paul Sijben schrieb:
>> All,
>>
>> in a worker thread setup that communicates via queues is it possible to
>> catch exceptions raised by the worker executed, put them in an object
>> and send them over the queue to another thread where the exception is
>> raised in that scope?
>>
>> considering that an exception is an object I feel it ought to be
>> possible, however I do not see how to go about it.
>>
>> does anyone have a pointer towards the solution?
>>
>> Paul
> 
> You're right, even exceptions are objects in Python. For further
> studies, read http://docs.python.org/lib/module-exceptions.html
> 
> You can catch an exception like this:
> try:
>   worker.do_some_work_that_may_raise_an_exception()
> except Exception, e:
>   # the first argument is the type of error you want to handle
>   # it is Exception here, the baseclass of all computation exceptions
>   # the second argument is the variable (name) where you want to save
>   # the specific exception raised to
>   # it's 'e' here, a common shortcut for exception
>   exception_handler.handle(e)
>   # notice that you can pass e around as you like
> 
> For further information on exceptions and how to handle them, read
> chapter 8 of the tutorial, especially starting from 8.3:
> http://docs.python.org/tut/node10.html#SECTION0010300000000000000000
> 
> P.S. I don't know if what I told still applies to Python 3.0 -- a lot of
> changes are upcoming related to exception raising and handling.


From steve at holdenweb.com  Thu Mar 22 05:57:36 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 05:57:36 -0400
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
Message-ID: <ettk12$dn6$2@sea.gmane.org>

Godzilla wrote:
> Dear all,
> 
> I cannot find a solution for my problem with inserting a blob object
> (>4000 in length) into an ORACLE database via ODBC.
> 
> 
> I have tried the two ways of inserting the blob object (a zip file):
> 
> 
> 1)
> fp = open("c:/test/test.zip", "r+b")
> data = fp.read()
> s = odbc.odbc(cs)
> qry = s.cursor()
> qry.execute("Insert into tBlob (data) values ('%s')" %
> data.encode('hex'))
> 
> 
> return the error: Input String Too Long Limit: 4096
> 
> 
> 2)
> qry.execute("Insert into tBlob (data) values (?)",
> data.encode('hex'))
> 
> 
> does not return error, but it does not insert the record correctly.
> 
> 
> Any help will be fully appreciated...
> 
Try, just on the off chance:

qry.execute("Insert into tBlob (data) values (?)",
             (data.encode('hex'), ))


The second argument to execute should always be a tuple. And be aware 
that the odbc module hasn't had much maintenance lately.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From bbxx789_05ss at yahoo.com  Mon Mar 26 22:49:24 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 26 Mar 2007 19:49:24 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <4608615b$0$444$426a74cc@news.free.fr>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
	<1174854156.298431.68150@n59g2000hsh.googlegroups.com>
	<XcOdnTRJmdpteZvbnZ2dnUVZ_qSrnZ2d@comcast.com>
	<1174925704.394888.18170@d57g2000hsg.googlegroups.com>
	<4608615b$0$444$426a74cc@news.free.fr>
Message-ID: <1174963764.642310.167760@p77g2000hsh.googlegroups.com>

On Mar 26, 6:49 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> ------------
> class Test(object):
>         pass

> def greet(x):
>         print "hello"

> Test.func = greet
> print Test.func

> t = Test()
> print t.func

> def sayBye(x):
>         print "bye"

> t.bye = sayBye
> print t.bye
> ------------output:
> <unbound method Test.greet>
> <bound method Test.greet of <__main__.Test object at 0x6dc50>>
> <function sayBye at 0x624b0>
>
>
> Because t.bye is an attribute of instance t, not of class Test.  A
> descriptor object has to be a class attribute for the descriptor
> protocol to be invoked.

Hurray!  Like this:


t.func -> __getattribute__() -> __get__() -> create method object and
return it
t.bye  -> __getattribute__() -> return sayBye


> FWIW, if you want to dynamically add a method to an instance:
>    inst.method = func.__get__(inst, inst.__class__)

Nice.




From Tonicopm at yahoo.com  Tue Mar 20 14:35:17 2007
From: Tonicopm at yahoo.com (Tonico)
Date: 20 Mar 2007 11:35:17 -0700
Subject: Yanqui bastards OPERATED 911 RACIST and HEINOUS CRIME Re: +++
	Russia Watched 9/11 In REAL TIME on SATELLITE +++
In-Reply-To: <1174410850.352979.104910@o5g2000hsb.googlegroups.com>
References: <1174284614.170100.264620@b75g2000hsg.googlegroups.com>
	<1174410850.352979.104910@o5g2000hsb.googlegroups.com>
Message-ID: <1174415717.299320.271780@l75g2000hse.googlegroups.com>

On 20 mar, 19:14, therm... at india.com wrote:
> Yank Bastards:

************   Hi!   *****************

> What evidence do you have for the 19 hijackers ?

************   Uh?   *****************

> What explanation do you have for thermate products ?

************   Uh + Uh ???    ***********

> What evidence do INCOMPETENT Graduates of the FBI Academy have for the
> suicide of building 7 ?

*************   So it was a suicide?!? Oh my...***sigh***...I told its
builders several times that the poor building thing looked depressed
and with sad walls....and now it's too late!....SOB!
****************

> Why were FBI rats running around to confiscate the evidence of missile
> hitting the Pentagon ?

***************   Most probably those rats were trying to get some
cheese, and they don't give much of a damn about missiles
***************

> Were the Passengers of the flights taken to Cincinnati incinerated in
> a NASA incineration chamber ?

*******************   I'm not sure but there's this theory that all of
them were actually raptured by some god following Bush's explicit
request    ********************

> Why did the lawyer, Rudy Bastard Guiliani destroy the evidence of the
> crime scene and why does FBI lack the balls to arrest him for a
> federal crime ?

*******************   Funny middle name Guiliani has; anyway, it seems
to be that when he destroyed evidence, Guiuliani also hid away FBI's
balls, and thus....well, since you're SO brilliant, ashtonishingly
acute and bewildering intelligent, and since you've figured ALL the
evil, damn complot (or conspirations: your choice) by yourself, I
won't bother you anymore with details.
Regards
Tonio
********************************************************



From duncan.booth at invalid.invalid  Sat Mar 31 15:57:10 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 31 Mar 2007 19:57:10 GMT
Subject: Sorting a multidimensional array by multiple keys
References: <pan.2007.03.31.12.43.14@no.spam.plz>
	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
	<pan.2007.03.31.13.42.19@no.spam.plz>
	<pan.2007.03.31.13.45.32@no.spam.plz>
	<Xns9904AA252EC47duncanbooth@127.0.0.1>
	<eum2sa$1gp$03$1@news.t-online.com>
Message-ID: <Xns9904D5128C891duncanbooth@127.0.0.1>

Peter Otten <__peter__ at web.de> wrote:

> Duncan Booth wrote:
> 
>>>>> from operator import itemgetter
>>>>> data.sort(key=itemgetter(0))
>>>>> data.sort(key=itemgetter(1))
>>>>> data.sort(key=itemgetter(4))
>>>>> data.sort(key=itemgetter(3))
> 
> Or, in Python 2.5:
> 
>>>> data.sort(key=itemgetter(3, 4, 1, 0))
> 
Thanks, I'd forgotten itemgetter had that strangley assymmetric behaviour 
of returning either a single value or a tuple.


From mail at microcorp.co.za  Thu Mar 29 02:14:59 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 29 Mar 2007 08:14:59 +0200
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com><1174052358.486071.163280@e65g2000hsc.googlegroups.com><46018fd8$0$18018$426a74cc@news.free.fr><q8oMh.15081$tD2.3516@newsread1.news.pas.earthlink.net><46091cdf$0$19664$426a74cc@news.free.fr><mailman.5698.1175063615.32031.python-list@python.org>
	<QKEOh.132101$_73.47865@newsread2.news.pas.earthlink.net>
Message-ID: <000f01c771d2$2fc41940$03000080@hendrik>

 "Dennis Lee Bieber" <wl....d at ix.netcom.com> wrote:


> On Wed, 28 Mar 2007 07:55:20 +0200, "Hendrik van Rooyen"
> <m...l at mi...orp.co.za> declaimed the following in comp.lang.python:

> > Pretty obvious of course, as is the pronounciation of the
> > name:  "Cholmondely"
> >
> Is that a scottish "Ch" (as in LoCH Lomond), plain hard "Ch" (as in
> CHristmas) or a soft "Ch" (as in CHicken)?

It comes out something like "Chum-lee", with the ch like chicken...

(that's what I have heard -  but who knows - It may have been 
a regional dialect, a case of the blind leading the blind, or 
someone pulling the piss..)

- Hendrik



From ale at unixmania.net  Fri Mar  9 10:53:57 2007
From: ale at unixmania.net (Alessandro de Manzano)
Date: Fri, 9 Mar 2007 16:53:57 +0100
Subject: about application deployment
Message-ID: <20070309155357.GA18113@libero.sunshine.ale>

Hello,

I'ld ask you all about deployment of python applications.

Sometimes (if not most times..) I would make deployment easy (easier)
for my customers (and for me too...)

What I mean, would be very useful to have a "jar-like" archive/single
file / multiple platform in order to deploy also complex applications
with many modules.

I know about "py2exe", it's nice but it's Windows only, I would need
something multiplatform or at least available also for other platforms
(*nix, Mac maybe, ...)

My impression is that Python is a great language but a bit "messy"
about on field deployment...

What am I missing ? :)
What are your experiences (and solutions ?) for this issues ?

Many thanks in advance!


bye!

Ale



From __peter__ at web.de  Thu Mar 22 09:49:43 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 Mar 2007 14:49:43 +0100
Subject: Removing a particular index from a list
References: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
	<ettveb$vti$01$1@news.t-online.com>
	<mailman.5455.1174569881.32031.python-list@python.org>
Message-ID: <etu1di$nqi$03$2@news.t-online.com>

Steve Holden wrote:

> Peter Otten wrote:
>> Srikanth wrote:
>> 
>>> list.remove(item) removes the first item from the list, but how do I
>>> say to remove a particular index from a list without using it's value?
>>>
>>> Let's say I have 4 items in my list as
>>>
>>>>>> li = ["sri", "s", "srikanth", "s"]
>>> And if I want to remove the last item ("s"), how do I remove it?
>>> li.remove(-1) doesn't do it.
>> 
>> del li[-1]
>> 
>>> This is my problem.
>> 
>> This, or not reading the tutorial.
>> 
> No, that's OUR problem :-)

And the fact that it's our /self-inflicted/ problem makes it all the more
severe :-)

Peter


From david.bear at asu.edu  Tue Mar  6 17:44:10 2007
From: david.bear at asu.edu (David Bear)
Date: Tue, 06 Mar 2007 15:44:10 -0700
Subject: using python to query active directory
References: <1234705.TuyeK9pzyv@teancum>
	<1173211209.757857.143780@v33g2000cwv.googlegroups.com>
Message-ID: <1638024.eePv2Hoa2H@teancum>

jay graves wrote:

> On Mar 6, 1:34 pm, David Bear <david.b... at asu.edu> wrote:
>> Is it possible to use python to make calls agains microsoft active
>> directory? I suppose this should be qualified by what is needed to do it
>> from windows (I assume the win32all package) and from linux (if
>> possible). Any code samples would be great.
> 
> Tim Golden is your man.
> 
> http://tgolden.sc.sabren.com/python/active_directory.html
> 

Yes, thank you. This looks great.
-- 
David Bear
-- let me buy your intellectual property, I want to own your thoughts --


From steve at REMOVEME.cybersource.com.au  Thu Mar  8 20:47:53 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 09 Mar 2007 12:47:53 +1100
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>
	<7xbqj3i7zk.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.09.01.47.53.45675@REMOVEME.cybersource.com.au>

On Thu, 08 Mar 2007 16:19:27 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
>> I thought "raise" on its own was supposed to re-raise the previous
>> exception, but I've just tried it in the interactive interpreter and it
>> doesn't work for me.
> 
> It means you can catch an exception, do stuff with it, and then pass
> it upward to earlier callers:

[snip code]

Are you saying it only works as advertised within the except clause of a
try...except block?



-- 
Steven D'Aprano 



From aleax at mac.com  Sat Mar  3 21:18:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 18:18:50 -0800
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
Message-ID: <1huevy2.1431m651a0okjjN%aleax@mac.com>

Raymond Hettinger <python at rcn.com> wrote:
   ...
> The notion that "pop" is only defined for stack operations is somewhat
> pedantic.

Worse: it's totally wrong.  It's also defined for eyes, as a musical
genre, as a kind of soda, as an avant-garde artistic movement of the
'50s, for baloons, as a parent of the male persuasion, for email
reading, and moreover it's often used to refer to Persistent Organic
Pollutants or Points Of Presence -- not forgetting weasels, either.


Alex


From memcached at aol.com  Sat Mar  3 22:57:12 2007
From: memcached at aol.com (memcached at aol.com)
Date: Sat, 3 Mar 2007 22:57:12 EST
Subject: running warnings
Message-ID: <cf9.ad8707f.331b9d98@aol.com>

I wrote these codes pieces:
 
try:
import termios, TERMIOS
except  ImportError:
try:
import  msvcrt
except  ImportError:
try:
from EasyDialogs import  AskPassword
except  ImportError:
getpass =  default_getpass
else:
getpass = AskPassword
else:
getpass =  win_getpass
else:
getpass =  unix_getpass
 
 
When running I got the error warnings:
 
/usr/lib/python2.3/TERMIOS.py:7: DeprecationWarning: the TERMIOS module is  
deprecated; please use termios
DeprecationWarning)
Traceback (most  recent call last):
File "t2.py", line 18, in ?
getpass = unix_getpass
NameError: name 'unix_getpass' is not defined
 
 
Can you tell me what're there warnings and how to avoid  them?Thanks!
<BR><BR><BR>**************************************<BR> AOL now offers free 
email to everyone.  Find out more about what's free from AOL at 
http://www.aol.com.
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From bernhard.voigt at gmail.com  Thu Mar 15 08:16:41 2007
From: bernhard.voigt at gmail.com (bernhard.voigt at gmail.com)
Date: 15 Mar 2007 05:16:41 -0700
Subject: Tools for GUI/graphics
In-Reply-To: <45f741ad$1@nntp.zianet.com>
References: <1173810046.6562@jubilee.claranet.pt>
	<C46dnbe3w4N9bmvYnZ2dnUVZ_u7inZ2d@comcast.com>
	<45f741ad$1@nntp.zianet.com>
Message-ID: <1173961001.699345.192180@o5g2000hsb.googlegroups.com>

You should take a look at matplotlib (http://
matplotlib.sourceforge.net/). It's possible to integrate the graphic
display into a python application, as well as writing files and
display them in a browser.

Bernhard



From steve at holdenweb.com  Wed Mar 21 16:43:28 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 16:43:28 -0400
Subject: Make variable global
In-Reply-To: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
References: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
Message-ID: <ets5gk$h92$1@sea.gmane.org>

abcd wrote:
> I have a file, "a.py"
> 
> blah = None
> def go():
>     global blah
>     blah = 5
> 
>>From the python interpreter I try....
> 
>>>> from a import *
>>>> blah
>>>> go()
>>>> blah
>>>>
> 
> ...i was hoping to see "5" get printed out the second time I displayed
> blah, but it doesn't.  Now, if I type this same code directly into the
> python interpreter it works as i was hoping.  what i am missing?
> 
> thanks
> 
That "blah" is global to module a, not to the whole program. You import 
all names from a, which creates a blah and a go in your local namespace, 
bound to the sames values those names have in module a.

When you call go() this sets a.blah to 5, but __main__.blah is still None.

It's those dratted namespaces again!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From tenax.raccoon at gmail.com  Wed Mar 21 12:05:16 2007
From: tenax.raccoon at gmail.com (Jason)
Date: 21 Mar 2007 09:05:16 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
In-Reply-To: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <1174493116.898509.302830@l77g2000hsb.googlegroups.com>

On Mar 21, 8:38 am, "dmitrey" <open... at ukr.net> wrote:
> Hi all,
> I looked to the PEPs & didn't find a proposition to remove brackets &
> commas for to make Python func call syntax caml- or tcl- like: instead
> of
> result = myfun(param1, myfun2(param5, param8), param3)
> just make possible using
> result =  myfun param1 (myfun2 param5 param8) param3
>
> it would reduce length of code lines and make them more readable, + no
> needs to write annoing charecters.
> Maybe it will require more work than I suppose, for example handling
> of things like
> result = myfun(param1, myfun2(param5, param8), param3=15, param4=200)
> to
> result =  myfun param1 (myfun2 param5 param8) param3=15 param4=200 #so
> it needs some more efforts to decode by compiler
>
> but anyway I think it worth.
> + it will not yield incompabilities with previous Python versions.
>
> WBR, D.

In my opinion, it is much less readable.  That may be due to my
experiences with TCL, BASH-scripting, with C, C++, and Python.  The
parenthesis make it very obvious that a function call is going on, and
mirrors the mathematical notations that denote using a function.

With touch-typing on an American keyboard, the ()'s are not really any
more annoying than any of the various top-row digits.  I personally
find the backslash character (\) to be far more annoying, as it can
have one of several locations depending on the keyboard style.  (Most
sanely put it above the "Enter" key.)

As others have pointed out, the code that you presented really isn't
all that much shorter.  Short code isn't really what Python's about.
Perl has many ways to write very short, incomprehensible code.

A further ambiguity to consider:

result = func1

Is the name "result" bound to the function func1?  Or is func1 called,
and its result is bound to the name "result"?

Good luck with your PEP.

  --Jason



From dave256 at mac.com  Sat Mar 17 21:52:33 2007
From: dave256 at mac.com (Dave Reed)
Date: Sat, 17 Mar 2007 21:52:33 -0400
Subject: How to parse the os.system() output in python
In-Reply-To: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>
References: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>
Message-ID: <250229B3-FC2F-440D-BB58-2BE30FE2A585@mac.com>


On Mar 17, 2007, at 8:28 PM, yinglcs at gmail.com wrote:

> Hi,
>
> I use os.system() to execute a system command in python.
> Can you please tell me how can I parse (in python) the output of the
> os.system()  ?
>
> Thank you.


Sounds like you want os.popen, not os.system.

http://docs.python.org/lib/module-popen2.html

Dave



From kay.schluehr at gmx.net  Wed Mar 28 11:37:35 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 28 Mar 2007 08:37:35 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175086435.174354.65640@l77g2000hsb.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
	<1175086435.174354.65640@l77g2000hsb.googlegroups.com>
Message-ID: <1175096255.850014.236570@p15g2000hsd.googlegroups.com>

On Mar 28, 2:54 pm, "Paul Boddie" <p... at boddie.org.uk> wrote:
> On 28 Mar, 14:12, "Kay Schluehr" <kay.schlu... at gmx.net> wrote:
>
>
>
> > A somewhat unrelated question. With Py3K Python gets optional type
> > annotations.
>
> No, I believe the consensus is that Python 3000 gets optional
> annotations which aren't specifically for type information... nudge
> nudge, wink wink! That last part is important, because that's also how
> many other people have interpreted this particular feature.

You are right. The feature is more situated on a syntactical /
interface level. The semantical level has to be specified by
annotation handlers. Among them there will also be those that deal
with type annotations. I have little doubts that one of them will make
it into the stdlib sooner or later and might also influence
compilation.

> I seem to
> recall that some of the PyPy people weren't interested in static
> analysis [1], so I'm skeptical about whether type annotations are
> their kind of thing, either.

That's why I asked the question with regard to Py3K style annotations
and not static analysis in Py2X which I consider intractible. The JIT
measures types at runtime and optimizes code using this information
but doing things in this style global optimizations are hardly
tractible as well. My main interest is in an intermediate level, given
type measurements as a byproduct of UTs and code coverage. This
methodology is process-oriented and non interferent.

> That said, I imagine that the handling of
> metadata (including type details) is an element in the way RPython
> works, but I also imagine that things get more complicated as such
> metadata diverges from plain type information and into arbitrary
> "observations" about other aspects of program behaviour.

RPython is heuristically defined as a subset of Python "static enough
to be translatable to C". So it is actually static analysis that is
done here, not on a local scale but on a simpler sublanguage. It is
not clear to me whether for a sufficiently annotated Py3K program the
inequation RPython != Python still holds?

> Still, I'd like to see the PyPy people stick their necks out and
> answer your questions. ;-)
>
> Paul
>
> [1]http://codespeak.net/pipermail/pypy-dev/2007q1/003607.html




From gagsl-py2 at yahoo.com.ar  Thu Mar  8 21:33:54 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 23:33:54 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>
Message-ID: <op.towhesywx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 21:11:54 -0300, Steven D'Aprano  
<steve at REMOVEME.cybersource.com.au> escribi?:

>>> @onfail(False)
>>> def a(x):
>>>     if x == 1:
>>>         return 'function a succeeded'
>>>     else:
>>>         raise
>
> I thought "raise" on its own was supposed to re-raise the previous
> exception, but I've just tried it in the interactive interpreter and it
> doesn't work for me.

Not the *previous* exception, but the *current* one. You must be inside an  
"except" clause to use a bare raise.

-- 
Gabriel Genellina



From robert.kern at gmail.com  Thu Mar 22 21:48:53 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 22 Mar 2007 20:48:53 -0500
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <1174611545.176636.283560@o5g2000hsb.googlegroups.com>
References: <460078E1.7000905@student.unsw.edu.au>	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>	<4600AA7B.1080605@student.unsw.edu.au>	<mailman.5374.1174456615.32031.python-list@python.org>	<yBjMh.18122$6.14978@tornado.fastwebnet.it>	<1174529579.990955.116390@l77g2000hsb.googlegroups.com>	<R1rMh.18272$6.13299@tornado.fastwebnet.it>	<1174574095.731406.318790@l77g2000hsb.googlegroups.com>	<eLEMh.20201$6.10662@tornado.fastwebnet.it>
	<1174611545.176636.283560@o5g2000hsb.googlegroups.com>
Message-ID: <etvbma$bqm$1@sea.gmane.org>

John Pye wrote:

> Sorry, I'm not clear on this and will need a bit more help. I'm not
> even sure where this _ctype dependency could be coming from -- do you
> have any ideas?

std::iostream triggers this, IIRC the last time I ran into this problem.

> Are you saying that I can't make your GCC tools work until the MinGW
> runtime is patched?

Not with that particular extension module.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From http  Sat Mar 17 02:42:27 2007
From: http (Paul Rubin)
Date: 16 Mar 2007 22:42:27 -0800
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xfy845q24.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> or even
> 
> len(filter(lambda t, y=y: y>t, x))


How about 

   min(i for i,t in enumerate(x) if t >= y)

or

   max(i for i,t in enumerate(x) if t <= y)

Those are actually pretty direct.


From manstey at csu.edu.au  Sun Mar 25 21:38:34 2007
From: manstey at csu.edu.au (manstey)
Date: 25 Mar 2007 18:38:34 -0700
Subject: replacing one instance with another
Message-ID: <1174873114.590028.130920@p15g2000hsd.googlegroups.com>

Hi,
I'm not sure why this doesn't work:

>>>dic_myinstances={}

>>>class MyClass(object):
    def __init__(self, id):
         global dic_myinstances
         if dic_myinstances.has_key(id):
              self = dic_myinstances[id]
         else:
              dic_myinstances[id] = self

>>>ins1 = MyClass('xx')
>>>ins2 = MyClass('yy')
>>>ins3 = MyClass('xx')
>>>ins3 is ins1
False

Why isn't ins3 the same as ins1? How can I get this to work?

thanks



From erwan.adam at cea.fr  Fri Mar  9 06:22:46 2007
From: erwan.adam at cea.fr (Erwan Adam)
Date: Fri, 09 Mar 2007 12:22:46 +0100
Subject: Pb with descriptor and super ...
In-Reply-To: <mailman.4848.1173437283.32031.python-list@python.org>
References: <esr95l$n12$1@ellebore.extra.cea.fr>
	<mailman.4848.1173437283.32031.python-list@python.org>
Message-ID: <esrg26$p6n$1@ellebore.extra.cea.fr>

Gabriel Genellina a ?crit :
> En Fri, 09 Mar 2007 06:25:08 -0300, Erwan Adam <erwan.adam at cea.fr> 
> escribi?:
> 
>> I have a problem with the use of descriptors
>> and super. The file is :
> 
> Descriptors for "super" behave a bit different than for classes. See
> http://www.python.org/2.2/descrintro.html#cooperation
> 
> --Gabriel Genellina
> 

Hi Gabriel,

Thanks for your answer ... I followed the link
and tried to use the "fully functional implementation of
the super() built-in class in pure Python" given
on this page and the result is quite surprising :

# -------------

class Super(object):
     def __init__(self, type, obj=None):
         self.__type__ = type
         self.__obj__ = obj
     def __get__(self, obj, type=None):
         if self.__obj__ is None and obj is not None:
             return Super(self.__type__, obj)
         else:
             return self
     def __getattr__(self, attr):
         if isinstance(self.__obj__, self.__type__):
             starttype = self.__obj__.__class__
         else:
             starttype = self.__obj__
         mro = iter(starttype.__mro__)
         for cls in mro:
             if cls is self.__type__:
                 break
         # Note: mro is an iterator, so the second loop
         # picks up where the first one left off!
         for cls in mro:
             if attr in cls.__dict__:
                 x = cls.__dict__[attr]
                 if hasattr(x, "__get__"):
                     x = x.__get__(self.__obj__)
                 return x
         raise AttributeError, attr

class Desc(object):
     def __init__(self, class_name):
         self.class_name = class_name
         return
     def __get__(self, obj, typ=None):
         print "Desc.__get__ : class_name is %s, obj is %s and typ is 
%s"%(self.class_name, obj, typ)
         return
     pass

class A(object):
     attr = Desc("A")
     pass

class B(A):
     attr = Desc("B")
     pass

b = B()

print "Using built-in super"
attr = super(B, b).attr
print "Using python Super"
attr = Super(B, b).attr

class MySuper(object):
     def __init__(self, type, obj=None):
         self.__type__ = type
         self.__obj__ = obj
     def __get__(self, obj, type=None):
         if self.__obj__ is None and obj is not None:
             return Super(self.__type__, obj)
         else:
             return self
     def __getattr__(self, attr):
         if isinstance(self.__obj__, self.__type__):
             starttype = self.__obj__.__class__
         else:
             starttype = self.__obj__
         mro = iter(starttype.__mro__)
         for cls in mro:
             if cls is self.__type__:
                 break
         # Note: mro is an iterator, so the second loop
         # picks up where the first one left off!
         for cls in mro:
             if attr in cls.__dict__:
                 x = cls.__dict__[attr]
                 if hasattr(x, "__get__"):
                     x = x.__get__(self.__obj__, cls)
                 return x
         raise AttributeError, attr

print "Using python MySuper"
attr = MySuper(B, b).attr


# ------------------------------

it gives :

[adam at is111902 /home/adam/Work/Python]> python super_from_guido.py
Using built-in super
Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7bc302c> 
and typ is <class '__main__.B'>
Using python Super
Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7bc302c> 
and typ is None
Using python MySuper
Desc.__get__ : class_name is A, obj is <__main__.B object at 0xb7bc302c> 
and typ is <class '__main__.A'>

the Super gives None for typ ... which is quite surprising !
In MySuper, I just change

                     x = x.__get__(self.__obj__)

by

                     x = x.__get__(self.__obj__, cls)

at the -3 :) line of the class ... and it gives the result I expected
at the beginning : obj is b and typ is A !!!!


Best regards,

                  E.A.


From justin.mailinglists at gmail.com  Thu Mar 29 06:11:44 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 29 Mar 2007 03:11:44 -0700
Subject: BeautifulSoup vs. Microsoft
In-Reply-To: <Xns99025B6FD25CFduncanbooth@127.0.0.1>
References: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
	<Xns99025B6FD25CFduncanbooth@127.0.0.1>
Message-ID: <1175163104.054405.28190@d57g2000hsg.googlegroups.com>

On Mar 29, 4:08 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
> John Nagle <n... at animats.com> wrote:
> >      title="<!--http://www.microsoft.com/usability/information.mspx->"
>
> > is supposed to be an HTML comment.  But it's improperly terminated.
>
> It is an attribute value, and unescaped angle brackets are valid in
> attributes. It looks to me like a bug in BeautifulSoup.

FWIW, see http://tinyurl.com/yjtzjz

new fan of BeautifulSoup here as it helped me parse "BAD" XML
(although my client would disagree with that description)



From steven.bethard at gmail.com  Sun Mar 18 19:17:33 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 18 Mar 2007 17:17:33 -0600
Subject: where function
In-Reply-To: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
References: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
Message-ID: <h7-dnRb39aATVWDYnZ2dnUVZ_h-vnZ2d@comcast.com>

vorticitywolfe at gmail.com wrote:
> Is there a function in Python analogous to the "where" function in
> IDL?
> 
> x=[0,1,2,3,4,2,8,9]
> print where(x=2)
> 
> output:
> [2,5]

If you're doing a lot of this kind of thing, you probably want to use 
numpy::

     >>> import numpy
     >>> x = numpy.array([0, 1, 2, 3, 4, 2, 8, 9])
     >>> numpy.where(x == 2)
     (array([2, 5]),)

You can find numpy here:

     http://numpy.scipy.org/

STeVe


From thinker at branda.to  Thu Mar  1 06:21:13 2007
From: thinker at branda.to (Thinker)
Date: Thu, 01 Mar 2007 19:21:13 +0800
Subject: Importing binary modules
In-Reply-To: <1172746279.351722.29410@p10g2000cwp.googlegroups.com>
References: <1172746279.351722.29410@p10g2000cwp.googlegroups.com>
Message-ID: <45E6B729.5070709@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

andre.dos.anjos at gmail.com wrote:
cut ......................
>
> The problem appears when libMyNewModule.so depends on another
> library, say libfoo.so, which sits also in /my/module/dir. In that
> case, '/my/ module/dir', needs to be preset in the LD_LIBRARY_PATH
> *before* the python interpreter is set.
>
> In this case, the snippet of code above will not work as one would
> expect. It will normally give an ImportError saying it cannot find
> libfoo.so. That happens, apparently, because the dynamic linker
> cannot rescan LD_LIBRARY_PATH after the python interpreter has
> started.
Since you create a new module, you should try to link your module with
- -rpath-link option.
You can specify a path searched by linker when finding shared object
required.



- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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Version: GnuPG v1.4.6 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFF5rcp1LDUVnWfY8gRAmLcAKCobvo06x84L0pj66amTBspTJ9nUwCg5sA+
MP7tLF/i8zqoZHl5Fxw2YsQ=
=BNQy
-----END PGP SIGNATURE-----



From nagle at animats.com  Mon Mar 19 17:55:24 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 19 Mar 2007 21:55:24 GMT
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <mailman.5303.1174339021.32031.python-list@python.org>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net><56863eF27p5bmU1@mid.uni-berlin.de><WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>	<1174334517.125928.274140@l75g2000hse.googlegroups.com>	<etmrvn$7fu$1@sea.gmane.org>
	<mailman.5303.1174339021.32031.python-list@python.org>
Message-ID: <gFDLh.9338$Um6.4065@newssvr12.news.prodigy.net>

Steve Holden wrote:
> Terry Reedy wrote:
> 
>> <kyosohma at gmail.com> wrote in message 
>> news:1174334517.125928.274140 at l75g2000hse.googlegroups.com...
>> | I've read .MDB files using ODBC. I don't know how big your files are,
>> | but I had a file with almost 3000 rows and I was able to fetch it in
>> | 1-2 seconds. If you want to give it whirl, you just need to create an
>> | ODBC connection and then do the following:
>>
>> I'll just mention that OpenOffice.org Base can make ODBC connections 
>> and output in several formats.  Don't know if their ODBC works with .MDB.
>>
> I seem to remember I actually managed to open an MDB file with the Open 
> Office database component (but that was on Windows, so I can't guarantee 
> it will work on Linux).

    That works fine on Windows, because OpenOffice can use Jet, the Access 
engine.  Don't know if it would work on Linux.  Probably not.

    I need to read about 10,000,000 records, and running them through an
OpenOffice spreadsheet probably isn't a good approach.  There are quite
a few tools for dealing with small Microsoft Access databases in memory, but
they don't scale.

    MDBtools would be the right answer, if it worked.  I have some questions
out on the MDBtools forum, trying to work around some build problems.
MDBtools hasn't had a release in three years, and it won't build with
Fedora Core 6.

					John Nagle


From gagsl-py2 at yahoo.com.ar  Tue Mar  6 03:46:13 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 Mar 2007 05:46:13 -0300
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
	<1huivd7.7l18eh1paqp0aN%aleax@mac.com>
	<1173167838.173634.62810@c51g2000cwc.googlegroups.com>
Message-ID: <op.torenbz3x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 04:57:18 -0300, Martin Unsal <martinunsal at gmail.com>  
escribi?:

> On Mar 5, 10:06 pm, a... at mac.com (Alex Martelli) wrote:
>> My favorite way of working: add a test (or a limited set of tests) for
>> the new or changed feature, run it, check that it fails, change the
>> code, rerun the test, check that the test now runs, rerun all tests to  
>> [...]

> From the way you describe your workflow, it sounds like you spend very
> little time working interactively in the interpreter. Is that the case
> or have I misunderstood?

FWIW, I only work interactively with the interpreter just to test some  
constructs, or use timeit, or check code posted here... Never to develop  
production code. That's why I don't care at all about reload(), by example.

-- 
Gabriel Genellina



From Nomad.C at gmail.com  Mon Mar 26 09:47:18 2007
From: Nomad.C at gmail.com (Nomad.C at gmail.com)
Date: 26 Mar 2007 06:47:18 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <mailman.5628.1174916538.32031.python-list@python.org>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
Message-ID: <1174916838.757839.143310@e65g2000hsc.googlegroups.com>

On Mar 26, 2:42 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On 26 Mar 2007 06:20:32 -0700, "Noma... at gmail.com" <noma... at gmail.com> wrote:
>
> >OK...
> >I've been told that Both Fortran and Python are easy to read, and are
>
> Python is hugely easier to read.
>
> >quite useful in creating scientific apps for the number crunching, but
> >then Python is a tad slower than Fortran because of its a high level
>
> Fortran is massively faster than Python.
>
> >language nature, so what are the advantages of using Python for
> >creating number crunching apps over Fortran??
>




> You can get the speed of fortran in Python by using libraries like
> Numeric without losing the readability of Python.
>

Can you back this up with some source??
Chris



From mlacunza at gmail.com  Sat Mar 17 19:38:33 2007
From: mlacunza at gmail.com (Mario Lacunza)
Date: Sat, 17 Mar 2007 18:38:33 -0500
Subject: Report options...
Message-ID: <1174174713.5217.4.camel@laptop>

Hello,

Right now Im migrating an VB6+Crystal report+Word App to Python+wxPython
+Reportlab+???

The VB system work with Word creating some patterns (title, foot prints,
etc) and users maybe could insert some Forms fields to personalize the
output connecting this fields with an recordset.

I dont want to use any external tool for this taks (OpenOffice+pyUno is
my last chance)

Any suggestion?

Thanks!

Mi configuracion/My config:

Ubuntu Edgy Eft 6.10
Linux Kernel 2.6.17-11-386
Gnome 2.16.1
Python 2.4.4c1
wxPython 2.8.1.1 Unicode
Python IDE: Ulipad 3.6
Database: Firebird 2.0 Superserver

-- 
Saludos / Best regards 

Mario Lacunza V?squez 
Desarrollador de Software - Webmaster
Linux Registered User #439179 
Desarrollador 2 Estrellas VS2005

Website        : http://mlacunzav[DOT]cogia[DOT]net 
Email          : mlacunza[AT]gmail.com / mario_lacunza[AT]yahoo.es
Blog           : http://mlacunza.blogspot.com
Lima - Peru



From vvikram at gmail.com  Tue Mar 20 15:23:03 2007
From: vvikram at gmail.com (vvikram at gmail.com)
Date: 20 Mar 2007 12:23:03 -0700
Subject: socket.getfqdn deadlock
Message-ID: <1174418583.490159.224260@e65g2000hsc.googlegroups.com>

Hi,

I am getting deadlocks (backtrace pasted below) after a while at,
presumably, a socket.getfqdn() call in a child process .

Fwiw: This child process is created as the result of a pyro call to a
Pyro object.

Any ideas why this is happening?

Thanks. Regards,
Vikram

---
Machine info:

Linux abcd 2.6.13-15.15-smp #1 SMP Mon Feb 26 14:11:33 UTC 2007 i686
i686 i386 GNU/Linux
SUSE LINUX 10.0 (i586)
VERSION = 10.0

----
Backtrace:

#0  0xffffe410 in __kernel_vsyscall ()
#1  0x4014c13e in __lll_mutex_lock_wait () from /lib/tls/libpthread.so.
0
#2  0x40148e35 in _L_mutex_lock_36 () from /lib/tls/libpthread.so.0
#3  0x00000000 in ?? ()
#4  0x40831ff4 in ?? () from /lib/libnss_files.so.2
#5  0x418c1ea0 in ?? ()
#6  0x418c1e78 in ?? ()
#7  0x418c1ac4 in ?? ()
#8  0x4082bc1c in _nss_files_gethostbyname2_r () from /lib/
libnss_files.so.2
#9  0x4082bc1c in _nss_files_gethostbyname2_r () from /lib/
libnss_files.so.2
#10 0x402f4b1c in gaih_inet () from /lib/tls/libc.so.6
#11 0x402f384c in getaddrinfo () from /lib/tls/libc.so.6
#12 0x404ffa21 in setipaddr ()
   from /cv/vendor/lib/python2.4/lib-dynload/_socket.so
#13 0x4050263b in socket_gethostbyaddr ()
   from /cv/vendor/lib/python2.4/lib-dynload/_socket.so



From miki.tebeka at gmail.com  Thu Mar 15 20:47:32 2007
From: miki.tebeka at gmail.com (Miki)
Date: 15 Mar 2007 17:47:32 -0700
Subject: Subclassing: what is wrong here?
In-Reply-To: <1174003302.156908@jubilee.claranet.pt>
References: <1174003302.156908@jubilee.claranet.pt>
Message-ID: <1174006052.451994.292820@d57g2000hsg.googlegroups.com>

Hello Paulo,

> What's wrong with this way of subclassing?
> ...
See  http://sourceforge.net/tracker/index.php?func=detail&aid=1448640&group_id=5470&atid=105470

HTH,
--
Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From steve at REMOVE.THIS.cybersource.com.au  Mon Mar 19 23:41:19 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 14:41:19 +1100
Subject: List to string
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
	<1174192714.014092.79380@l77g2000hsb.googlegroups.com>
	<45fe7ddc$0$25292$426a34cc@news.free.fr>
Message-ID: <pan.2007.03.20.03.41.19.501610@REMOVE.THIS.cybersource.com.au>

On Mon, 19 Mar 2007 13:11:09 +0100, Bruno Desthuilliers wrote:

> There's no "cast" in Python. It would make no sens in a dynamically 
> typed language, where type informations belong to the LHS of a binding, 
> not the RHS.

Surely you have left and right mixed up?

x = 1
x = None
x = "spam"
x = []

The name x has no type associated with it. The object bound to the name
does.



-- 
Steven.



From gagsl-py2 at yahoo.com.ar  Wed Mar 21 02:02:39 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 21 Mar 2007 03:02:39 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<etqecu$kl5$1@rumours.uwaterloo.ca>
Message-ID: <op.tpiy2p1ux6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 02:04:30 -0300, Ross Ridge  
<rridge at caffeine.csclub.uwaterloo.ca> escribi?:

> Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:

>> You can get the file descriptor from the Python file object using its
>> fileno() method. The file descriptor lives at the OS level, so it's safe
>> to pass around.
>
> Not under Windows.  Windows doesn't have Unix-like descriptors, so the
> C runtime emulates them.

Using get_osfhandle on that pseudo-descriptor gives a Windows file handle;  
that handle should be equivalent (that is, it has a similar role:  
identifies an open file uniquely inside a process, and is independent on  
the C runtime library)

-- 
Gabriel Genellina



From inq1ltd at verizon.net  Sun Mar 11 14:03:53 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sun, 11 Mar 2007 13:03:53 -0500
Subject: Signed zeros: is this a bug?
In-Reply-To: <1173631052.614449.51370@h3g2000cwc.googlegroups.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
Message-ID: <200703111303.53912.inq1ltd@verizon.net>


#########
>
> Interesting.  So on Windows there's probably no
> hope of what I want to do working.
> But on a platform where the C library does the
> right thing with signed zeros, this
> behaviour is still a little surprising.  I
> guess what's happening is that there's
> some optimization that avoids creating two
> separate float objects for a float literal
> that appears twice, and that optimization
> doesn't see the difference between 0. and -0.
>
> >>> x, y = 0., -0.
> >>> id(x) == id(y)
>
> True
>
> jim-on-linux's solution works in the
> interpreter, but not in a script, presumably
> because we've got file-wide optimization rather
> than line-by-line optimization.
>
> #test.py
> x = -0.0
> y = 0.0
> print x, y
> #end test.py
>
> >>> import test
>
> -0.0 -0.0
>
> Mark


This is the only way I could make this work in a 
script.

from decimal import Decimal

x = Decimal( "-0.0")
y= Decimal("0.0")
print x,y


x = Decimal( "0.0")
y= Decimal("-0.0")
print x,y



jim-on-linux
http:\\www.inqvista.com














From parsons.nicholas1 at gmail.com  Sat Mar  3 15:56:39 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Sat, 3 Mar 2007 15:56:39 -0500
Subject: pop method question
In-Reply-To: <7xd53qxdb2.fsf@ruckus.brouhaha.com>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
Message-ID: <0037D2CD-B88D-4785-B107-F630EBD9788E@gmail.com>


On Mar 3, 2007, at 3:49 PM, Paul Rubin wrote:

> Nicholas Parsons <parsons.nicholas1 at gmail.com> writes:
>> I was just playing around in IDLE at the interactive prompt and typed
>> in dir({}) for the fun of it.  I was quite surprised to see a pop
>> method defined there.  I mean is that a misnomer or what?  From the
>> literature, pop is supposed to be an operation defined for a stack
>> data structure.  A stack is defined to be an "ordered" list data
>> structure.  Dictionaries in Python have no order but are sequences.
>> Now, does anyone know why the python core has this pop method
>> implemented for a dictionary type?
>
> Try typing:
>
>   help({}.pop)
> --  
> http://mail.python.org/mailman/listinfo/python-list

Thanks, that gives a more details explanation of what the behavior is  
but doesn't answer my question above :(



From steve at holdenweb.com  Thu Mar 22 14:20:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 14:20:42 -0400
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <RuyMh.34$ek6.6@newsfe12.lga>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>	<1174493856.663144.236880@y80g2000hsf.googlegroups.com>	<1174495236.067618.69030@l77g2000hsb.googlegroups.com>
	<RuyMh.34$ek6.6@newsfe12.lga>
Message-ID: <etuhgd$fve$1@sea.gmane.org>

Bart Willems wrote:
> dmitrey wrote:
>> 1st still is shorter by 1 char; considering majority of people use
>> space after comma & number of parameters can be big it yileds
>> foo bar baz bar2 bar3 bar4
>> vs
>> foo(bar, baz, bar2, bar3, bar4)
> 
> I think most readers already agree on the ambiguities part. Now, for the 
> length of the code...
> I agree that in you example the first syntax yields a full /five/ spaces 
> less than the second syntax. However, it ignores the fact that if you 
> are creating functions with that many arguments, you are probably doing 
> something wrong. Can't those arguments be provided as a list?

I'm in danger of getting short-tempered on c.l.py for the first time in 
a long time. If you think that five arguments is an excessive number for 
a function then you live in a world of toy programs.

> Let's see what is shorter:
> 
> foo bar baz bar2 bar3 bar4
> or
> foo *bars
> 
> Not to mention that it might (or might not) be a good idea to wrap the 
> function in some kind of class where you can specify a whole bunch of 
> attributes, so that you do not have to call a function with that many 
> arguments to start with.

Right, I think I have to assume that you're taking the piss.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From duncan.booth at invalid.invalid  Tue Mar 13 10:22:23 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Mar 2007 14:22:23 GMT
Subject: number generator
References: <mailman.5016.1173790665.32031.python-list@python.org>
Message-ID: <Xns98F2923507EB5duncanbooth@127.0.0.1>

Dick Moores <rdm at rcblue.com> wrote:

>>On the other hand, making sure that each combination occurs equally
>>often (as your example might imply) is doable but still leaves the
>>question whether the order of the numbers matters: are [1,46,1,1,1]
>>and [1,1,46,1,1] the same or different combinations?
> 
> If the added constraint is instead that the probability of generating 
> a given list of length N be the same as that of generating any other 
> list of length N, then I believe my function does the job.

I believe you are correct about the distribution. Unfortunately the 
running time for sumRndInt seems to go up exponentially as it gets stuck 
in that while loop desperately trying to find a random sequence that 
fits. 

C>timeit.py -s"from test import sumRndInt" "sumRndInt(50,4)"
100 loops, best of 3: 5.23 msec per loop

C>timeit.py -s"from test import sumRndInt" "sumRndInt(50,5)"
10 loops, best of 3: 21.8 msec per loop

C>timeit.py -s"from test import sumRndInt" "sumRndInt(50,6)"
10 loops, best of 3: 108 msec per loop

C>timeit.py -s"from test import sumRndInt" "sumRndInt(50,7)"
10 loops, best of 3: 861 msec per loop

C>timeit.py -s"from test import sumRndInt" "sumRndInt(50,40)"
... still waiting ...

By comparison, the algorithm using sorted(sample(...)) finishes quickly 
for all input values and also gives a flat distribution:

C>timeit.py -s"from partition import partition" "partition(50,4,1)"
100000 loops, best of 3: 20.2 usec per loop

C>timeit.py -s"from partition import partition" "partition(50,5,1)"
10000 loops, best of 3: 23 usec per loop

C>timeit.py -s"from partition import partition" "partition(50,6,1)"
10000 loops, best of 3: 25.2 usec per loop

C>timeit.py -s"from partition import partition" "partition(50,7,1)"
10000 loops, best of 3: 29.6 usec per loop

C>timeit.py -s"from partition import partition" "partition(50,40,1)"
10000 loops, best of 3: 100 usec per loop


From lbates at websafe.com  Wed Mar 28 15:04:00 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 28 Mar 2007 14:04:00 -0500
Subject: newbi question on python rpc server, how it works?
In-Reply-To: <mailman.5720.1175107122.32031.python-list@python.org>
References: <mailman.5720.1175107122.32031.python-list@python.org>
Message-ID: <gqidnWn2ZNOAIZfbnZ2dnUVZ_uiknZ2d@comcast.com>

krishnakant Mane wrote:
> hello,
> searched a lot of places including google search but can't find
> answers to python-rpc.  I am also very new to rpc.  I am very clear
> about its meaning and where it is to be used, but not about how it is
> done.
> I have a need where I need to create a layer of business logic that
> will connect to mysql database at one end and a wxpython based thin
> client at the other end.
> can some one give me basic idea as to how I can use simple xml rpc
> server class of python and build an xml rpc server and then a client
> which I can embed in my wxpython based thin client?
> as I said I am not aware of how xml rpc works in details.
> I want to creat the wxpython client app in such a way that it only
> does the work of validation and display and only sending the data as
> is to the xml rpc server for logic and then xml rpc server will
> inturn talk to mysql.
> my business logic consists of many classes which I want to put in a
> package directory with __init__.py and all the other modules.
> do I need to create all of them as xml rpc server instances or can I
> use them into one single xml rpc server class?
> at the other end I am not really understanding how the xml rpc client
> can be used to get data in to my wx based gui?
> for example I want to fill up a list box with data that came from the
> rpc server to the client and then some how looping through the
> elements sent over and putting into a list.
> 
> regards.
> Krishnakant

I'm no expert, but maybe I can get you started.

If you understand how a SQL database works you can extend that knowledge
to RPC.  You make queries to the RPC server and it returns responses.
The format of the queries/responses is "normally" XML, but I'm pretty
sure you could invent your own if you wanted to (probably a bad idea).
Basically you define an API (like SQL queries define their API) that is
used by the clients to make requests, update information, retrieve
information, etc.

You probably should take a look at Twisted module.  It does XMLRPC with
just a few lines of code and also would scale well as you have many
users talking to the server.  Download Twisted and take a look.  You
might also want to pick up a copy of "Twisted Network Programming
Essentials":

http://www.oreilly.com/catalog/twistedadn/

I'll bet it will be worth the purchase price if you choose to go this
direction.

-Larry Bates


From sbassi at clubdelarazon.org  Wed Mar 21 15:59:56 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Wed, 21 Mar 2007 16:59:56 -0300
Subject: Wikipedia and a little piece of Python History
In-Reply-To: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
Message-ID: <9e2f512b0703211259l71a09a1ei393755127980c93b@mail.gmail.com>

On 21 Mar 2007 12:18:50 -0700, Paddy <paddy3118 at googlemail.com> wrote:
> I just had a link to Tim peters first post on doctest:
> http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
....

AFAIK, Google doesn't offer a permalink to usenet/group post (since a
mayor "upgrade" they made some time ago). So this link may change in
the future and point to somewhere else.

Best,
SB.


From steve at holdenweb.com  Tue Mar 13 19:43:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 13 Mar 2007 19:43:26 -0400
Subject: struct.pack oddity
In-Reply-To: <dave.opstad-91D5E6.13200413032007@reader0901.news.uu.net>
References: <45f6bd4a$0$6972$afc38c87@> <45f6d7a9$1@nntp.zianet.com>
	<dave.opstad-91D5E6.13200413032007@reader0901.news.uu.net>
Message-ID: <et7d1r$cai$1@sea.gmane.org>

Dave Opstad wrote:
> In article <45f6d7a9$1 at nntp.zianet.com>,
>  "Erik Johnson" <nobody at invalid.com> wrote:
> 
>>     Barring anyone else disagreeing with classifying it as a bug, I would
>> suggest reporting it. Proper procedure for reporting a bug appears to be
>> covered in section B of the Python Library Reference:
>> http://docs.python.org/lib/reporting-bugs.html
> 
> Thanks for that link. I searched for an existing bug covering this case 
> and found 1229380, which specifically lists the case I raised. The bug 
> appears to have been closed last June, which confuses me since the bad 
> behavior remains in 2.5.
> 
> Dave

In which case it would be helpful to re-open the bug. At the very least 
this should result in an explanation of why the bug was closed.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From chris.lasher at gmail.com  Fri Mar 23 13:50:15 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 23 Mar 2007 10:50:15 -0700
Subject: How to list current line in pdb?
In-Reply-To: <Xns98FCA22302CBDduncanbooth@127.0.0.1>
References: <1174663589.717404.169520@n76g2000hsh.googlegroups.com>
	<Xns98FCA22302CBDduncanbooth@127.0.0.1>
Message-ID: <1174672215.030358.267240@n76g2000hsh.googlegroups.com>

On Mar 23, 11:56 am, Duncan Booth <duncan.bo... at invalid.invalid>
wrote:
> "Chris Lasher" <chris.las... at gmail.com> wrote:
> > Using the pdb shell, after repeatedly entering 'l' (lowercase 'L'),
> > how do I jump back to listing the current line again if I don't
> > remember exactly what line my current line is? Do I just have to list
> > an early line in the code and repeatedly list from there until I see
> > the '->' indicating the current line?
>
> Try:
>
> (Pdb) alias ll u;;d;;l
>
> and thereafter the 'll' command will list the current line (unless you are
> in the uppermost stack frame in which case it goes down one stackframe
> instead).
>
> Save the alias in your .pdbrc file.

Alright. Thanks, Duncan!



From MonkeeSage at gmail.com  Sun Mar  4 03:38:04 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 4 Mar 2007 00:38:04 -0800
Subject: Yet another string interpolation function...
Message-ID: <1172997484.386995.126830@s48g2000cws.googlegroups.com>

There are several string interpolation functions, as well as
string.Template. But here's yet another. This one emulates ruby's
inline interpolation syntax (using #{}), which interpolates strings as
well as expressions. NB. It uses eval(), so only use it in trusted
contexts!

import sys, re
def interp(string):
  locals  = sys._getframe(1).f_locals
  globals = sys._getframe(1).f_globals
  for item in re.findall(r'#\{([^{]*)\}', string):
    string = string.replace('#{%s}' % item,
                            str(eval(item, globals, locals)))
  return string

test1 = 'example'
def tryit():
  test2 = 1
  # variable interpolation
  print interp('This is an #{test1} (and another #{test1}) and an int
(#{test2})')
  # expression interpolation
  print interp('This is an #{test1 + " (and another " + test1 + ")"}
and an int (#{test2})')
tryit()

Recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502257

Ok, now tell me all the things wrong with it! ;)

Regards,
Jordan



From kyosohma at gmail.com  Thu Mar 15 15:42:36 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 15 Mar 2007 12:42:36 -0700
Subject: Using wildcards with Popen in the Subprocess module
In-Reply-To: <mailman.5141.1173980396.32031.python-list@python.org>
References: <mailman.5141.1173980396.32031.python-list@python.org>
Message-ID: <1173987756.473442.310070@p15g2000hsd.googlegroups.com>

On Mar 15, 2:04 pm, William Hudspeth <bhudsp... at edac.unm.edu> wrote:
> Hello,
>
> I am needing to pass an argument to the Popen function of the Subprocess
> module that includes a wildcard in the filename. It seems that Popen is
> not able to expand wildcards, and treats a filename that includes a
> wildcard as a literal.
>
> EX.
>
> var1="/path_to_files/filnames*.doc"
> result=Popen(["command",var1]).wait()
>
> Can anyone tell me how I can work around this problem?
>
> Thanks, Bill

What are you doing, exactly? IF you are just passing in a random
filename, you could do something like this:

var1 = "/path_to_files_/%s" % (filename)

where filename is another variable.

You might also look into using os.system which allows just about any
command line options to be used.

Hope this helps.

Mike



From duncan.booth at invalid.invalid  Thu Mar 29 07:58:34 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 Mar 2007 11:58:34 GMT
Subject: PyPy 1.0: JIT compilers for free and more
References: <D78AD813-12F4-49D2-81B3-157681FEC6A4@stackless.com>
	<mailman.5747.1175163481.32031.python-list@python.org>
Message-ID: <Xns9902840109A04duncanbooth@127.0.0.1>

Robin Becker <robin at reportlab.com> wrote:

> I am hugely encouraged by this
> 
> C:\Python\devel\pypy-1.0.0>\python24\python \python\lib\test
\pystone.py
> Pystone(1.1) time for 50000 passes = 1.49586
> This machine benchmarks at 33425.6 pystones/second
> 
> C:\Python\devel\pypy-1.0.0>.\pypy-c.exe \python\lib\test\pystone.py
> Pystone(1.1) time for 50000 passes = 2.16123e-005
> This machine benchmarks at 2.3135e+009 pystones/second
> 
> 
>:) not

It looks like time.clock() is completely borked.

C:\work\pypy-1.0.0>\python25\python
Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit 
(Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> from time import clock, sleep
>>> clock(); sleep(3); clock()
1.6203176660720846e-005
3.000427987355935
>>> clock(); sleep(3); clock()
8.2580051375244619
11.258311321690327
>>> clock(); sleep(3); clock()
16.283118664523005
19.283642753478446
>>> ^Z


C:\work\pypy-1.0.0>pypy-c
Python 2.4.1 (pypy 1.0.0 build 41438) on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>> from time import clock, sleep
>>>> clock(); sleep(3); clock()
1.0000000000337512
1.0000050338639583
>>>> clock(); sleep(3); clock()
1.0000103837992871
1.0000154196831568
>>>>

Or perhaps it is simply telling you the sort of speeds it hopes to reach 
some day (I wouldn't say no to  9.16021e+009 pystones/second if that was 
what it actually did).


From webraviteja at gmail.com  Mon Mar 26 23:19:14 2007
From: webraviteja at gmail.com (Ravi Teja)
Date: 26 Mar 2007 20:19:14 -0700
Subject: ZSI, SOAP and .NET web services - problem
In-Reply-To: <j3yu411c2ifw$.dlg@zabiello.com>
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
	<slrnf0g9u4.jo9.dek@oliver.lbl.gov>
	<j3yu411c2ifw$.dlg@zabiello.com>
Message-ID: <1174965553.971482.144910@n59g2000hsh.googlegroups.com>

On Mar 26, 3:47 pm, Jaroslaw Zabiello <hipertrac... at gmail.com> wrote:
> Dnia Mon, 26 Mar 2007 20:06:28 +0000 (UTC), David E. Konerding DSD staff
> napisa?(a):
>
> > Try fixing your WSDL, then try again.
>
> The problem is I see no errors in my WSDL. Pythonic implementation of SOAP
> is just crapy.
>
> --
> Jaroslaw Zabiellohttp://blog.zabiello.com

As Lawrence suggested, did you try soaplib? It is a newer project. Try
the more recent svn version
svn co https://svn.optio.webfactional.com/soaplib/trunk soaplib

In my experience, it is more compliant than ZSI, although I mainly
used it as a server than a client.

Ravi Teja.



From bearophileHUGS at lycos.com  Thu Mar 15 08:59:54 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 15 Mar 2007 05:59:54 -0700
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <mailman.5130.1173960370.32031.python-list@python.org>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
Message-ID: <1173963594.399520.306910@n59g2000hsh.googlegroups.com>

Steve Holden:
> once you know how long it is you
> no longer have access to the elements. Or did I miss something?

Now and then I need to know how many elements there are, and not what
they are, so in those situations storing them isn't necessary.

Bye,
bearophile



From marco at waven.com  Mon Mar 12 23:58:59 2007
From: marco at waven.com (Marco)
Date: Tue, 13 Mar 2007 11:58:59 +0800
Subject: how to set different TCP_KEEPALIVE parameters for different socket ?
Message-ID: <5c62a320703122058s5a333e41h3b810241841beab3@mail.gmail.com>

Hi,

I can use sd.setsockopt() to enable the socket use TCP keepalive
feature, but how to set a different parameters(interval, probes and
time) for it?
Sure, I can modify /proc/sys/net/ipv4/tcp_* , but need root password
and will affect other program.

Thank you!


-- 
LinuX Power


From godzillaismad at gmail.com  Thu Mar 22 18:25:25 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 22 Mar 2007 15:25:25 -0700
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <zazMh.15244$tD2.5343@newsread1.news.pas.earthlink.net>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
	<mailman.5449.1174564707.32031.python-list@python.org>
	<1174567006.244721.115890@n59g2000hsh.googlegroups.com>
	<zazMh.15244$tD2.5343@newsread1.news.pas.earthlink.net>
Message-ID: <1174602325.193108.271840@e65g2000hsc.googlegroups.com>

On Mar 23, 4:38 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On 22 Mar 2007 05:36:46 -0700, "Godzilla" <godzillais... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > Steve, I think I've tried what you have suggested without any luck as
> > well... The statement works fine, but what inserted is not correct...
> > it seems like only the symbol '?' was inserted into the blob field...
>
>         You didn't have a set of 's around the ?, did you? Parameter
> substitution will add needed quotes on its own rather than you having to
> put in quotes.
>
>         Also, though I find no documentation on it, odbc module cursors have
> setinputsizes() and setoutputsizes() methods -- perhaps that could
> change things... OTOH: the db-api 1.0 PEP (which is, it seems, what odbc
> module follows) says they may be do-nothing methods.
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

Gidday Dennis,

Thank you for your suggestion. I have found those two functions you
mentioned, and there were not much or no documentation for those
functions... I used both function and they pretty much do nothing for
me...



From svwi at combra.se  Mon Mar 12 05:53:39 2007
From: svwi at combra.se (svwi at combra.se)
Date: 12 Mar 2007 02:53:39 -0700
Subject: Using .NET COM-objects and "GetType"
Message-ID: <1173693219.544664.183520@p10g2000cwp.googlegroups.com>

Hi.

I need to dynamically retreive the type name of a COM-object exposed
by a C# COM server.

This was previously successfully done in .NET framwork 1.X with the
method "GetType()", inherited by all classes from System.Object.

Moving to .NET framework 2.0, it stopped working. All I get from
"GetType()" is a PyIUnknown that has no IDispatch interface.

Cannot understand how to get it working.

Appreciate any help.

Thanks!

/nevS



From alan.franzoni_invalid at geemail.invalid  Thu Mar  8 11:13:23 2007
From: alan.franzoni_invalid at geemail.invalid (Alan Franzoni)
Date: Thu, 8 Mar 2007 17:13:23 +0100
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
	<45E8FADB.7000902@cosc.canterbury.ac.nz>
	<1rgq149m7oern$.1080aifmn5qo8$.dlg@40tude.net>
	<mailman.4702.1173156968.32031.python-list@python.org>
	<1fenbu7prg0bm.3q5rj5s6vex4$.dlg@40tude.net>
	<mailman.4761.1173287732.32031.python-list@python.org>
Message-ID: <1bdfx695pyh2e.iuxunb0ki5z6$.dlg@40tude.net>

Il Wed, 07 Mar 2007 14:13:28 -0300, Gabriel Genellina ha scritto:

> __iadd__, in general, is not *required* to modify the instance in place  
> (but should try to do that, if possible). After this code:
> 	b = a
> 	a += c
> you can't assert than a and b both refer to the *same* object, as before.  
> If you need that, don't use += at all. (For a generic object, I mean. The  
> built-in list "does the right thing", of course)

Surely _I_ can't, and _I_ won't. But take the opposite example.

Let's say I'm using an external library, and that library's author provides
any kind of 'convenience' container type he feels useful for the library's
purposes, but without forcing a type constraint to the parameters passed to
a certain function - as should be done in a language like python, and this
container does create a copy of the object even employing incremental
operators.

Now, let's suppose I find that container type not useful for my purposes,
*or* I have already written a different container type which mimicks a
list's behaviour (adding some kind of functionality, of course).

Now, let's suppose a certain function in that library should give a certain
result based on the contents of that container, but without modifying the
original object, but it needs to modify it in order to do some operations. 

if the function looks like this:

def foo(container):
	container += [1, 2, 3]
	... 

it might happen that the original object gets modified even when it
shouldn't, depending on the actual object passed to the library.

What I just mean... I don't see calling extend() to be that painful in
respect to += . If there were no other way to do it, I would agree it would
be useful. But if there're such methods, do we really need this syntactic
sugar to introduce confusion?

-- 
Alan Franzoni <alan.franzoni.xyz at gmail.com>
-
Togli .xyz dalla mia email per contattarmi.
Remove .xyz from my address in order to contact me.
-
GPG Key Fingerprint (Key ID = FE068F3E):
5C77 9DC3 BD5B 3A28 E7BC 921A 0255 42AA FE06 8F3E 


From lbates at websafe.com  Mon Mar 12 12:25:00 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 12 Mar 2007 11:25:00 -0500
Subject: Newbie Question : "grep"
In-Reply-To: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
References: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
Message-ID: <45F57EDC.6090405@websafe.com>

moogyd at yahoo.co.uk wrote:
> Hello,
> 
> I am attempting to write my first Python script to extract some
> information from a file, and place it into another file.
> (I am trying to find the physical postions of 4 cells within an FPGA)
> I have a working solution, and would appreciate any comments.
> 
> for line in lines:
> 
>     if "placed" in line:
>         if "i_a/i_b/ROM/" in line:
>             pos = (line.split()[4]).split("_")[1]
>             if "B18" in line:
>                print "        i_a/i_b/ROM/B18 [7:6] LOC =", pos
>             elif "B14" in line:
>                print "        i_a/i_b/ROM/B14 [5:4] LOC =", pos
>             elif "B10" in line:
>                print "        i_a/i_b/ROM/B10 [3:2] LOC =", pos
>             elif "B6" in line:
>                print "        i_a/i_b/ROM/B6 [1:0] LOC =", pos
>             else:
>                print "Error"
> 
> Specific questions
> - Use for "Phrase" in line or line.find("Phrase") >= 0 ?
> - If I increase number of elements I am searching for, then I have
> more elif...elif. Is there a cleaner solution?
> 
> Thanks for any feedback.
> 
> Steven
> 
Something like (not tested):

def search(search_gates, line):
    for gate, index in search_gates:
        pos = (line.split()[4]).split("_")[1]
        if gate in line:
            return "        i_a/i_b/ROM/%s %s LOC =%s" % (gate, index, pos)


    return "Error"


search_gates=[('B6', '[1:0]'), 'B10', '[3:2]'),
               'B14', '[5:4]'), 'B17', '[7:6]')]

for line in lines:
    print search(search_gates, line)

-Larry


From torriem at chem.byu.edu  Tue Mar 27 11:03:52 2007
From: torriem at chem.byu.edu (Michael L Torrie)
Date: Tue, 27 Mar 2007 09:03:52 -0600
Subject: Help in Placing Object in Memory
In-Reply-To: <56sp7kF2b0fj6U1@mid.uni-berlin.de>
References: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
	<56sp7kF2b0fj6U1@mid.uni-berlin.de>
Message-ID: <1175007832.25261.14.camel@contra>

On Tue, 2007-03-27 at 16:49 +0200, Diez B. Roggisch wrote:
> > can two python script share a common object....?
> 
> What do you mean by that? They can both load a pickled object, yes. But they
> can't share it as a at-runtime object, where changes in one script are
> immediately are known to the other.

Remote procedure call, such as Python Twisted's PB library can allow
this to virtually be the case.

> 
> To do such a thing, look at pyro.
> 
> Diez



From stefaan.himpe at gmail.com  Mon Mar 19 08:35:48 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 19 Mar 2007 05:35:48 -0700
Subject: XML based programming language
In-Reply-To: <56786fF2743atU2@mid.uni-berlin.de>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
Message-ID: <1174307748.936567.191440@e1g2000hsg.googlegroups.com>

> Elementtree isn't lex. You are comparing apples and oranges here. Lex
> tokenizes, yacc creates trees. Both of is covered in XML itself - it's
> defined the tokenization and parsing, built into elementtree. So,
> elemnttree is lex _and_ yacc for XML. And if your language is written in
> XML, that's all there is to it.

I see your point. But yacc does more: I specify a grammar, and yacc
will
reject input files that do not conform to the grammar.
Elementtree OTOH will happily accept any valid XML file, all checking
has to
implememented manually by me.

Best regards,
Stefaan.



From kevinliu23 at gmail.com  Fri Mar 30 12:59:37 2007
From: kevinliu23 at gmail.com (kevinliu23)
Date: 30 Mar 2007 09:59:37 -0700
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <pan.2007.03.30.16.42.03.969536@gmx.net>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
	<pan.2007.03.30.16.42.03.969536@gmx.net>
Message-ID: <1175273977.089538.94880@r56g2000hsd.googlegroups.com>

Hey guys, thanks for the quick replies. I'm looking for something more
generic than adding it to "2a 3ab". For example, under the menu option
2, there can be upwards of 8 other suboptions. I'll see what's
suggested here and post back if I run into more problems. Thanks guys!



From Florian.Lindner at xgm.de  Sun Mar  4 06:52:49 2007
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Sun, 04 Mar 2007 12:52:49 +0100
Subject: RSS feed creator
Message-ID: <esebu7$jq2$1@news.in.tum.de>

Hello,
I'm looking for a python library that creates a RSS and/or Atom feed. E.g. I
give a list like that:
[
  [title1, short desc1, author1],
  [title2, short desc2, author2],
]

and the library creates a valid feed XML file. (return as a string)

Thanks,

Florian


From Joshua.R.English at gmail.com  Sat Mar 17 01:34:44 2007
From: Joshua.R.English at gmail.com (Joshua.R.English at gmail.com)
Date: 16 Mar 2007 22:34:44 -0700
Subject: Odd error
Message-ID: <1174109684.594766.320600@l77g2000hsb.googlegroups.com>

I'm trying to use a script that I originally wrote on a Mac Classic
machine and have moved to a Windows XP machine.

I can open the script and edit the thing, but when I try to run it in
I get:
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
    return self.func(*args)
  File "C:\Python25\lib\idlelib\MultiCall.py", line 151, in handler
    r = l[i](event)
  File "C:\Python25\lib\idlelib\ScriptBinding.py", line 151, in
run_module_event
    dirname = os.path.dirname(filename)
  File "C:\Python25\lib\ntpath.py", line 207, in dirname
    return split(p)[0]
  File "C:\Python25\lib\ntpath.py", line 172, in split
    while head2 and head2[-1] in '/\\':
TypeError: 'int' object is not iterable

I've converted the text to windows format, and the other scripts that
I transferred at the same time work.

What's going on here?



From yinyang at eburg.com  Sun Mar  4 03:29:09 2007
From: yinyang at eburg.com (Gordon Messmer)
Date: Sun, 04 Mar 2007 00:29:09 -0800
Subject: thread safe SMTP module
In-Reply-To: <esd374$927$1@panix3.panix.com>
References: <mailman.4616.1172878783.32031.python-list@python.org>
	<esd374$927$1@panix3.panix.com>
Message-ID: <45EA8355.1090608@eburg.com>

Aahz wrote:
> 
> That doesn't make any sense.  Blocking I/O generally releases the GIL,
> which is the whole reason Python doesn't totally suck for threading.

Nevertheless, among the caveats listed at 
http://docs.python.org/lib/module-thread.html is:

"Not all built-in functions that may block waiting for I/O allow other 
threads to run. (The most popular ones (time.sleep(), file.read(), 
select.select()) work as expected.)"

> There may be other thread problems, but I doubt that you have correctly
> analyzed their source.

I subclassed smtplib.SMTP and replaced only the lines of code that had 
to do with blocking IO (connect, send and receive operations). 
Beforehand, python would occasionally lock up. Having made those 
changes, python stopped locking up.  I think the problem was pretty well 
apparent.  I can't pin it down to which one of those three operations 
was at fault, and it may be that only one was.  However, when I use 
non-blocking IO, the application works.  When I used smtplib.SMTP, it 
didn't.

I'm open to other explanations.


From nospam at invalid.com  Sat Mar 10 14:17:42 2007
From: nospam at invalid.com (Jack)
Date: Sat, 10 Mar 2007 11:17:42 -0800
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
Message-ID: <P6adnZ3fVZ78mW7YnZ2dnUVZ_qemnZ2d@comcast.com>

Thanks for all the replies. Because I want to convert an int,
Dan's function actually does it well.

"Jack" <nospam at invalid.com> wrote in message 
news:I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d at comcast.com...
> This is a naive question:
>
> "%u" % -3
>
> I expect it to print 3. But it still print -3.
>
> Also, if I have an int, I can convert it to unsigned int in C:
>   int i = -3;
>   int ui = (unsigned int)i;
>
> Is there a way to do this in Python?
> 




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 11 08:30:51 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 13:30:51 +0100
Subject: distributed queue?
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
	<55h495F250nqbU1@mid.individual.net>
	<7xhcsssgsm.fsf@ruckus.brouhaha.com>
Message-ID: <55ib3rF24d6qgU4@mid.individual.net>

Paul Rubin wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>

>> (Why does everyone think that "concurrency" equals "usage of
>> multiple threads"?)
> 
> Well, it doesn't necessarily, but that's easiest a lot of the
> time.

I don't think so. Personally, I like multiplexing better. I think it
has less complex code.
 
>> Try Twisted for your networking needs.
> 
> I should try to understand Twisted better one of these days, but
> it's much more confusing than threads.  

Sure? I don't think so. I once tried using threads and quickly had
more code for threading than for my functionality, and even had
problems, e. g. with synchronisation or shutting down properly.

IMHO, Twisted is easier, like most multiplexing techniques: Just
write your code (derived from existing client or server classes)
and hook it up to the reactor, and the rest works automagically. 

(You can even hook your protocol to stdin/stdout or install
a "manhole" in the server. You also have twistd which does all the
daemon and logging work for you. Yes, I'm biased ;) )

> Also, the function I want to parallelize does blocking operations
> (database lookups), so in Twisted I'd have to figure out some way
> to do them asynchronously.

Twisted _is_ asynchronous networking. It also has database classes:

http://twistedmatrix.com/documents/current/api/twisted.enterprise.html

Regards,


Bj?rn

-- 
BOFH excuse #292:

We ran out of dial tone and we're and waiting for the phone company
to deliver another bottle.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  1 17:45:27 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 01 Mar 2007 23:45:27 +0100
Subject: How to update DNS record
References: <es5v6v$pv8$1@online.de> <45e71210$0$323$e4fe514c@news.xs4all.nl>
	<es7a73$ace$1@online.de>
Message-ID: <54p3c7F218re0U1@mid.individual.net>

Andi Clemens wrote:

> It's working!!!
> Yeah!
> I don't know why I didn't get this the first time I tried
> dnspython, but now its working! And it's so easy, 3 lines of code:

Great, thanks for reporting back.

Regards,


Bj?rn

-- 
BOFH excuse #310:

asynchronous inode failure



From dickinsm at gmail.com  Sun Mar 11 17:29:48 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 14:29:48 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <Xns98F0AFA4DC7DAtim111one@216.196.97.136>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
	<Xns98F0AFA4DC7DAtim111one@216.196.97.136>
Message-ID: <1173648587.967820.254030@8g2000cwh.googlegroups.com>

On Mar 11, 5:15 pm, Tim Peters <tim.... at comcast.net> wrote:
 It's a bug that keeps resurfacing, probably because there's no
portable
> way to test that it stays fixed :-( (it's not an accident that the OP
> relied on atan2 to distinguish +0.0 from -0.0!  they act the same in
> /almost/ all contexts).

Not an accident, but not a contrived example either.  I'd rewritten
all the cmath routines (in pure Python) to be more numerically aware
and use the
`correct' (= those recommended by Kahan) branch cuts.  It was in
writing the unit tests for this that the problems above surfaced.

By the way, I don't suppose that anybody would be interested in
a rewritten cmath for Python 2.6?  It wouldn't be hard for me to
rewrite what I already have in C, and add suitable documentation
and tests.

Mark



From ah at hatzis.de  Sat Mar 24 12:31:36 2007
From: ah at hatzis.de (Anastasios Hatzis)
Date: Sat, 24 Mar 2007 17:31:36 +0100
Subject: Pattern for foo tool <-> API <-> shell|GUI
Message-ID: <200703241731.36914.ah@hatzis.de>

I'm looking for a pattern where different client implementations can use the 
same commands of some fictive tool ("foo") by accessing some kind of API. 
Actually I have the need for such pattern for my own tool 
(http://openswarm.sourceforge.net). I already started restructuring my code 
to separate the actual command implementations from the command-line scripts 
(which is optparser-based now) and have some ideas how to proceed. But 
probably there is already a good pattern used for Python-based tools.

In the case that some of you are interested into this topic and my recent 
thoughts, you may want to have a look at the description below. Any comments 
are very much appreciated. Hopefully this list is a good place for discussing 
a pattern, otherwise I would be okay to move this to another place. Thank 
you.

Here we go:
The tool package itself provides several commands, although not important for 
the pattern itself, here some examples: modifying user-specific preferences, 
creating and changing project settings files, project-related 
code-generation, or combinations of such commands ... later also commands for 
transformation between several XML formats etc. The classes which implement 
these commands are currently in multiple modules, each having a class named
CmdHandler.

I have some Python scripts (each having a ScriptHandler classes), for use via 
command-line. Each ScriptHandler class is responsible to add all related 
command-line options and process those provided by the user (based on 
optparse library from Python standard lib). The script then calls the 
corresponding command and provide the verified options as parameters.

Due to the nature of the tool under specific conditions the following results 
may come during command execution:
* successful execution, no interaction
* critical error, execution cancelled
* user interaction needed (e.g. prompt user to approve replace existing 
directory (yes/no), prompt user to provide an alternative option)

Command-line interactions work simply with raw_input().

So far this works. Nevertheless, there are some other aspects that could be 
improved, but this is another topic: The tool uses custom exceptions (e.g. 
for critical errors) and logging features (based on logging from Python 
standard lib). Currently no automated tests, but I have to add.

For the next step I plan to support not only my own command-line scripts, but 
also a GUI to access the commands, as well as 3rd-party products (themselves 
command-line scripts or GUIs, such as foo plugins for any 3rd-party-tools). As 
far as I see, these clients need to implement a handler that:
(1) Collecting all required parameters and optional parameters from a user
(2) Provide these parameters for a particular call to command API
(3) Provides some kind of hooks that are called back from the API on specific 
events, e.g. Question with user-choice; Information with user-input
(4) Provide a logging handler object from the tool logging 
class or a sub-class of that in the case that a client-specific logging object 
should be triggered on each debug, message, warning etc.

(1) is very client-specific, e.g. in a GUI via dialogs.

(2) Each command provides a signature for all required/optional parameters. 
They are all verified from the command itself, although a client could do 
some verification at the first place.

(3) Example use-case: a command needs to know if the user wants the command to 
proceed with a particular action, e.g. "Do you want to delete bar.txt?" 
with "Yes", "No" and "Cancel" choice. So the client's handler object (which 
is provided as first parameter to each command) implements client-specific 
features to show the user this question (e.g. pop-up dialog with question and 
three buttons), receive the user input (clicking one of the buttons) and pass 
this choice back to the foo API. Alternatively some kind of text information 
could be required, as in raw_input(), so actually this probably would be two 
different interaction features to be implemented.

(4) The foo API also provides a logging class. The client needs to initialize 
such an object and provide it as member of the handler object provided to the 
API. I wonder if some clients may have own logging features and want to 
include all log messages from foo tool to the own logs. In this case a client 
could its own sub-class of the foo logging class and extending it with 
callbacks to its (client-)native logging object.

What do you think about this?

Best regards,
Anastasios


From kickslop at yahoo.com  Wed Mar 28 16:16:43 2007
From: kickslop at yahoo.com (kickslop)
Date: 28 Mar 2007 13:16:43 -0700
Subject: dynamic module does not define init function (initpsycopgmodule)
Message-ID: <1175113003.241496.44350@n76g2000hsh.googlegroups.com>

Clearly I am doing something braindead here with psycopg 1.1.21
(psycopg2 is not an option).

Any ideas?  I get the same results when I build it with Red Hat's GCC
3.4.6 setup as well as our in-house GCC 3.3.5 setup.

Linux rcf-temp3 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:32:02 EDT 2006
x86_64 x86_64 x86_64 GNU/Linux

Python 2.3.4 (#1, Sep 26 2006, 17:25:54)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import psycopgmodule
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: dynamic module does not define init function
(initpsycopgmodule)
>>>

psycopg-1.1.21 % nm -a psycopgmodule.so | grep init
0000000000004748 T _init
0000000000005000 T initpsycopg
0000000000009770 T psyco_DBAPITypeObject_init
0000000000009580 T psyco_init_types
                 U pthread_mutex_init@@GLIBC_2.2.5



From kyosohma at gmail.com  Thu Mar 22 18:01:31 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 22 Mar 2007 15:01:31 -0700
Subject: Upgrading python question
In-Reply-To: <mailman.5487.1174597222.32031.python-list@python.org>
References: <mailman.5487.1174597222.32031.python-list@python.org>
Message-ID: <1174600891.926691.174310@y66g2000hsf.googlegroups.com>

On Mar 22, 4:00 pm, Tommy Grav <t... at mac.com> wrote:
> I am currently using Activepython 2.4.4, but would like to upgrade to
> 2.5. Am I right in thinking that if I do that I need to reinstall all
> the
> packages and modules (like numpy, scipy, pyfits, and so on)? Or is
> there a way to avoid that?
>
> Cheers
>    Tommy

I think you'll need to install the other packages/modules too, or you
could copy the folders to the same logical directory tree and see if
it works. I've done that with modules that haven't been "upgraded" to
2.5.

Mike



From hg at nospam.org  Fri Mar  9 10:35:28 2007
From: hg at nospam.org (hg)
Date: Fri, 09 Mar 2007 16:35:28 +0100
Subject: floating point rounding
References: <DOiIh.135$TK5.124@newsfe13.lga><uHjIh.21006$oJ1.746@newsfe18.lga>
	<1173477489.186292.167530@c51g2000cwc.googlegroups.com>
Message-ID: <7ilIh.9243$xh2.8041@newsfe14.lga>

John Henry wrote:

> On Mar 9, 5:45 am, hg <h... at nospam.org> wrote:
>> hg wrote:
>> > Hi,
>>
>> > Here is my issue:
>>
>> > f = 1.5 * 0.01
>> > f
>> >>> 0.014999999999999999
>> > '%f' % f
>> >>>'0.015000'
>>
>> > But I really want to get 0.02 as a result ... is there a way out ?
>>
>> > Thanks,
>>
>> > hg
>>
>> round
> 
> 
> Or more precisely:
> 
> round(0.014999999999999999,2)
> 
> if that's what you wish to do.
Indeed.

hg



From nagle at animats.com  Tue Mar 27 12:47:06 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 27 Mar 2007 16:47:06 GMT
Subject: shutil.copy Problem
In-Reply-To: <mailman.5667.1174999208.32031.python-list@python.org>
References: <mailman.5648.1174965082.32031.python-list@python.org>	<1174970535.061022.141230@l77g2000hsb.googlegroups.com>	<BAY105-DAV16498BE4BF3A127F6369E9956E0@phx.gbl>
	<mailman.5667.1174999208.32031.python-list@python.org>
Message-ID: <eUbOh.3434$Kd3.2921@newssvr27.news.prodigy.net>

Facundo Batista wrote:
> David Nicolson wrote:
> 
> 
>>Thanks, but it's definitely not the print. In original the code the  
>>print statements are replaced by a call to a log method.
>>
>>Besides, the exception would be different if it was thrown outside of  
>>the try block.
> 
> 
> The best you can do is take the piece of code that has the problem, show
> it to us, and then copy the traceback.
> 
> Regards,

   There may be some problem here with a file being recognized as Unicode
in binary mode.  That shouldn't happen, but looking at the Windows
UNICODE support, it might not be impossible.

   Information needed:

	- Platform (Windows, Linux, ...)
	- Python version
	- A hex dump of the first few bytes of the input file.

					John Nagle


From caseyhHAMMER_TIME at istar.ca  Sun Mar 11 11:21:54 2007
From: caseyhHAMMER_TIME at istar.ca (Casey Hawthorne)
Date: Sun, 11 Mar 2007 15:21:54 GMT
Subject: a better solution for GUI in python
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <hb78v2ttbro86naq62bmlt0joc6m7ga6n7@4ax.com>

For a browser interface have you thought of Ajax and possibly WPF/E?

http://en.wikipedia.org/wiki/AJAX

http://en.wikipedia.org/wiki/Windows_Presentation_Foundation
--
Regards,
Casey


From rustybear at gmail.com  Sat Mar 31 17:21:23 2007
From: rustybear at gmail.com (rustybear at gmail.com)
Date: 31 Mar 2007 14:21:23 -0700
Subject: help with dates
Message-ID: <1175376083.763091.128700@b75g2000hsg.googlegroups.com>


I'm working on a website for some firefighters that want to be able to
sign-up for overtime and I need some help figuring out a date related
problem.

Here's the scenario:

Four groups of firefighters (group1, group2, group3, group4). Each
group works a 24 hr shift. So group1 works April 1, group2 works April
2, group3 works April 3, group4 works April 4, group 1 works April 5,
etc. It just keeps rolling like this forever into next year, etc.

I need to come up with a methodology for the following:



From tim at tdw.net  Fri Mar 30 09:12:04 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 30 Mar 2007 14:12:04 +0100
Subject: Sending emails to 3 addresses....
In-Reply-To: <R69358212.47.7059.1@mxextra>
References: <B69357484.8.7032.2@mxextra> <R69358212.47.7059.1@mxextra>
Message-ID: <9afea2ac0703300612va67dfd7jf73eb90bfb64ee12@mail.gmail.com>

On 30/03/07, Tim Williams <tim at tdw.net> wrote:

Emile,   (slight change to my original reply)

You are passing the TO addresses as 3 addresses in a single string.

[TO] results in a list containing a single string - not a list
containing 3 individual addresses.

You need to either pass the addresses to the function as a list
containing the 3 addresses as individual strings, and remove the
conversion to a list at sending time.  Or change

[TO]

to

TO.split(',')

HTH :)


From george.sakkis at gmail.com  Sat Mar 17 16:43:07 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 17 Mar 2007 13:43:07 -0700
Subject: Automagically log changes in table
Message-ID: <1174164187.257094.236020@l75g2000hse.googlegroups.com>

This is more in the context of Turbogears/SQLAlchemy, but if anyone
has implemented something similar with other packages it might be
useful to know.

I'd like to have a way to make a table "loggable", meaning it would
get, say, two fields "last_modified" and "modified_by", and every
write operation on it would automatically record the time and the id
of the user who did the addition or change (I'm not sure how to deal
with deletions let's leave this for now). Has anyone done something
like that or knows where to start from ?

George



From steve at holdenweb.com  Thu Mar 15 19:04:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 15 Mar 2007 19:04:09 -0400
Subject: problem with str()
In-Reply-To: <1173992205.985657.167970@y66g2000hsf.googlegroups.com>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>	<mailman.5149.1173990948.32031.python-list@python.org>
	<1173992205.985657.167970@y66g2000hsf.googlegroups.com>
Message-ID: <etcjg0$suh$1@sea.gmane.org>

7stud wrote:
> Sheesh! You would think that after looking at every inch of the code
> for way too many hours, at some point that would have poked me in the
> eye.
> 
> Thanks all.
> 
Get yourself a stuffed bear, and next time you have this kind of problem 
spend a few minutes explaining to the bear exactly how your program 
can't possibly be wrong. Works like a charm.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From MonkeeSage at gmail.com  Sun Mar 11 04:44:01 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 11 Mar 2007 00:44:01 -0800
Subject: number generator
In-Reply-To: <55hoq0F24n8enU1@mid.individual.net>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<55hoq0F24n8enU1@mid.individual.net>
Message-ID: <1173602641.326746.310070@s48g2000cws.googlegroups.com>

On Mar 11, 2:16 am, greg <g... at cosc.canterbury.ac.nz> wrote:
> MonkeeSage wrote:
> > this ... requires that M be evenly divisible by N,
>
> No, it doesn't -- I never said the numbers had
> to be *equal*.

Sorry for not being clear. I was refering to my specific
implementation of the algorithm, not the generic design pattern.

Regards,
Jordan



From MonkeeSage at gmail.com  Thu Mar  8 23:34:34 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Mar 2007 20:34:34 -0800
Subject: Where to "import"?
In-Reply-To: <mailman.4838.1173414465.32031.python-list@python.org>
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
	<1173393063.705376@jubilee.claranet.pt>
	<45f09905$0$28886$426a34cc@news.free.fr>
	<1173413376.191416.30990@s48g2000cws.googlegroups.com>
	<mailman.4838.1173414465.32031.python-list@python.org>
Message-ID: <1173414874.004346.279340@30g2000cwc.googlegroups.com>

On Mar 8, 10:27 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> Class names should be CamelCase. Read it again, and notice the difference
> between a "Descriptive" section and a "Prescriptive" one.

Yes, I misread Bruno's comment (missed that he was speaking of class
names). Disregard my post.



From robin at reportlab.com  Fri Mar 16 12:01:29 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 16 Mar 2007 16:01:29 +0000
Subject: mySQLdb versus platform problem
Message-ID: <45FABF59.9020509@chamonix.reportlab.co.uk>

I am seeing different outcomes from simple requests against a common database 
when run from a freebsd machine and a win32 box.


The test script is
#######################
import MySQLdb, sys
print sys.version
print MySQLdb.__version__
db=MySQLdb.connect(host='appx',db='sc_0',user='user',passwd='secret',use_unicode=True)
cur=db.cursor()
cur.execute('select * from sc_accomodation where id=31')
data=cur.fetchall()

for i,t in enumerate(data[0]):
     if isinstance(t,(str,unicode)): print i,repr(t)
#######################

The table in question is charset='latin1', however the original owners put some 
special windows characters in eg 0x92 (a quote).

in the windows version I see this kind of string in the output

2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)]
1.2.1_p2
.........
14 u'Built entirely of mahogany, Acajou seeks to introduce a new concept of
living in the midst of nature on the C\xf4te d\x92Or beach which stretches
along the island\x92s northern coast.\r\n\r\nThe hotel\x92s 24 standard
and 4 superior ro........

the freeBSD machine produces

2.4.3 (#2, Sep  7 2006, 09:34:29)
[GCC 3.4.4 [FreeBSD] 20050518]
...........
14 u'Built entirely of mahogany, Acajou seeks to introduce a new concept of
living in the midst of nature on the C\xf4te d\u2019Or beach which stretches
along the island\u2019s northern coast.\r\n\r\nThe hotel\u2019s 24 standard
and 4 superior rooms.......

so the windows version seems to leave the \x92 as is and the freebsd version 
converts it to its correct value.

This is already bad enough as I expected the outcomes to be the same, but given 
that the encoding of the database is wrong I expected some problems.

However, if I don't have use_unicode=True in the above script I get back 
strings, but this time the difference is larger.

windows
2.4.4 (#71, Oct 18 2006, 08:34:43) [MSC v.1310 32 bit (Intel)]
1.2.1_p2
.......
2 "C\xf4te d'Or\r\nPraslin"
.......

unix

2.4.3 (#2, Sep  7 2006, 09:34:29)
[GCC 3.4.4 [FreeBSD] 20050518]
1.2.1_p2
......
2 "C\xc3\xb4te d'Or\r\nPraslin"
.......

so here the returned string appears to have been automatically converted to utf8.


My questions are

1) why the difference in the unicode version?
2) why does the unix version convert to utf8?

The database being common it seems it's either the underlying libraries or the 
compiled extension or python that causes these differences, but which?
-- 
Robin Becker



From bearophileHUGS at lycos.com  Sat Mar  3 04:11:49 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 3 Mar 2007 01:11:49 -0800
Subject: print a ... z, A ... Z, "\n"' in Python
In-Reply-To: <mailman.4623.1172909667.32031.python-list@python.org>
References: <mailman.4623.1172909667.32031.python-list@python.org>
Message-ID: <1172913109.184004.132680@30g2000cwc.googlegroups.com>

js:
> crange = lambda c1, c2: [ chr(c) for c in range(ord(c1), ord(c2)+1) ]
> ''.join(chr(c) for c in crange('a', 'z') + crange('A', 'Z'))

Yes, managing char ranges is a bit of pain with Python.
You can also pack those chars:

xcrange = lambda cc: (chr(c) for c in xrange(ord(cc[0]), ord(cc[1])
+1))

But I don't like that much.

The calls:
''.join(xcrange('az')) + ''.join(xcrange('AZ'))

But note that you return the last item of the range too, and that goes
against the semantic of the usual Python range/xrange, so you may want
to call this function with another name.

Maybe there are better ways to solve this problem. Maybe a way to
generate (closed?) char ranges can be added to the Python standard
lib.

Bye,
bearophile



From paddy3118 at googlemail.com  Wed Mar 21 15:18:50 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 21 Mar 2007 12:18:50 -0700
Subject: Wikipedia and a little piece of Python History
Message-ID: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>

I just had a link to Tim peters first post on doctest:
http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
removed from http://en.wikipedia.org/wiki/Doctest as it doesn't fit
their guidelines for external links.
I wonder, could maybe the official website be persuaded to host a copy
so that it could be linked to?

Tim, would you object?

- Paddy.



From goodTweetieBird at hotmail.com  Wed Mar 21 16:37:09 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 13:37:09 -0700
Subject: Printing __doc__
In-Reply-To: <mailman.5421.1174507936.32031.python-list@python.org>
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
	<mailman.5421.1174507936.32031.python-list@python.org>
Message-ID: <1174509429.694682.191480@o5g2000hsb.googlegroups.com>

On Mar 21, 3:11 pm, "Terry Reedy" <tjre... at udel.edu> wrote:
> "gtb" <goodTweetieB... at hotmail.com> wrote in message
>
> news:1174506426.108098.243940 at d57g2000hsg.googlegroups.com...
> | Greetings,
> |
> | Don't know the daily limit for dumb questions so I will ask one or
> | more.
> |
> | In a function I can use the statement n =
> | sys._getframe().f_code.co_name to get the name of the current
> | function. Given that I can get the name how can I print the __doc__
> | string? I cant use the following, it will tell me to bugger off as the
> | string has no such attribute.
> |
> | def spam(self):
> |    n = sys._getframe().f_code.co_name
> |    print n.__doc__      #Wrong
> |    print __doc__         #No good either
> |    #....
>
> The docstring you are looking for is attached to the *function* object as
> .__doc__ and .func_doc.  Frame.f_code is a *code* object.  It has a
> boilerplate doc string, but not the one you want.  As near as I can tell,
> frames do not keep references to the func object but only the code object,
> which is all it needs to run the code.
>
> I believe tracebacks use co_filename and co_name to find the text of a
> function.  You could try to parse out the doc string from there.
>
> Terry Jan Reedy

Thanks for posting.

OK, .__doc__ or .func_doc

But still the question remains. I cannot use
  print .__doc__
OR
  print .func_doc

within the function.




From psdasilvaX at esotericaX.ptX  Sun Mar 25 18:44:56 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sun, 25 Mar 2007 23:44:56 +0100
Subject: Join strings - very simple Q. ERRATA
In-Reply-To: <1174847538.764119@jubilee.claranet.pt>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<1174746810.280731@jubilee.claranet.pt>
	<1174772896.902905.25640@p15g2000hsd.googlegroups.com>
	<1174847538.764119@jubilee.claranet.pt>
Message-ID: <1174862900.872356@jubilee.claranet.pt>

Paulo da Silva escreveu:
> John Machin escreveu:
>> On Mar 25, 12:32 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>>> John Machin escreveu:
> ...
...

> knowledge. If you feel that it is a question that deserves the
> honour of your response, just do it. Write it on the stones and
> send them down to the common people :-) . ...
Should be read *ordinary* people. This is an error caused by language
differeneces where comum (pt) is ordinary (en) and ordinario (pt
relatively ofensive term) is common (en).
...
> 
> Yes, and also, as last resource, I could always consult an oracle
> somewhere in the ancient Greece, *come* back and unsubscribe this NG. :-)
> 

Regards.
Paulo


From duncan.booth at invalid.invalid  Tue Mar 27 03:34:30 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 27 Mar 2007 07:34:30 GMT
Subject: PDB does not allow jumping to first statement?
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
Message-ID: <Xns990055A772011duncanbooth@127.0.0.1>

"Chris Lasher" <chris.lasher at gmail.com> wrote:

> I noticed that I absolutely cannot jump back to the first statement
> (line 3, "a = 1") using the jump command. I can jump to any other line
> BUT the first statement's using the "jump <line number>" command. I
> experience the same behavior with Winpdb and rpdb2. Why is this?
> 

Which version of Python, and what happens when you try it?

It works fine for me with Python 2.5 on Windows:

C:\Temp>\python25\python -m pdb t.py
> c:\temp\t.py(3)<module>()
-> a = 1
(Pdb) s
> c:\temp\t.py(4)<module>()
-> b = 2
(Pdb) j 3
> c:\temp\t.py(3)<module>()
-> a = 1
(Pdb)


From ptmcg at austin.rr.com  Sun Mar 18 15:43:42 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 18 Mar 2007 12:43:42 -0700
Subject: Renaming or Overloading In Python
In-Reply-To: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>
References: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>
Message-ID: <1174247022.278707.77610@b75g2000hsg.googlegroups.com>

On Mar 18, 2:17 pm, "gamename" <namesagame-use... at yahoo.com> wrote:
> Hi,
>
> I'm a recent convert from TCL.  One of the more powerful aspects of
> TCL is the ability to rename a function at will (generally for testing
> purposes).
>
> Example from the tcl doc:
>
> rename ::source ::theRealSource
> set sourceCount 0
> proc ::source args {
>     global sourceCount
>     puts "called source for the [incr sourceCount]'th time"
>     uplevel 1 ::theRealSource $args
>
> }
>
> So, is such a thing possible in Python?
>
> Thanks,
> -T

If you do this sort of thing a lot, you might read up on Python
decorators.  Using a simple syntax, you can easily wrap a function
with debugging/logging, synchronization, or any other wrapper
behavior.  Here is your function counter implemented as a decorator:

def functionCounter(fn):
    fname = fn.__name__
    def tempFn(*args):
        tempFn._callCount += 1
        print "Calling %s for the %d'th time" % (fn.__name__,
tempFn._callCount)
        fn(*args)
        print "Called %s for the %d'th time" % (fn.__name__,
tempFn._callCount)
    tempFn._callCount = 0
    tempFn.__name__ = fn.__name__
    return tempFn

@functionCounter
def foo():
    print "body of foo"

foo()
foo()
foo()

Prints out:
Calling foo for the 1'th time
body of foo
Called foo for the 1'th time
Calling foo for the 2'th time
body of foo
Called foo for the 2'th time
Calling foo for the 3'th time
body of foo
Called foo for the 3'th time


What is happening here is that, at module import time, the function
functionCounter is called, passing it the function foo.  The @
decorator is a shortcut for this statement, entered after foo is
defined:

foo = functionCounter(foo)

You can find more decorators at the Python wiki:
http://wiki.python.org/moin/PythonDecoratorLibrary

-- Paul





From irstas at gmail.com  Mon Mar 26 11:03:49 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 26 Mar 2007 08:03:49 -0700
Subject: Zip file writing progress (callback proc)
In-Reply-To: <mailman.5627.1174916476.32031.python-list@python.org>
References: <mailman.5627.1174916476.32031.python-list@python.org>
Message-ID: <1174921429.049446.35070@n59g2000hsh.googlegroups.com>

On Mar 26, 4:41 pm, durumdara <durumd... at gmail.com> wrote:
> Hi!
>
> I want to check my zip file writings.
> I need some callback procedure to show a progress bar.
> Can I do that?
> I don't want to modify the PyLib module to extend it, because if I get
> another py, the changes are lost.
> This happening too if I copy the zip module to modify it.
> Any solution?
>
> Thanks for it:
>     dd

Would it be enough to show progress based on how many files have
been added to the zip? If you're zipping just one huge file, I'm
afraid you can't get a progress bar using the zipfile module.

If it's not necessary that the one file is a zip but simply
compressed,
you can use zlib or bz2 modules to compress incrementally:
http://www.python.org/doc/lib/node303.html




From miki.tebeka at gmail.com  Wed Mar 21 10:47:27 2007
From: miki.tebeka at gmail.com (Miki)
Date: 21 Mar 2007 07:47:27 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
In-Reply-To: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <1174488447.404840.112960@n76g2000hsh.googlegroups.com>

Hello Dmitrey,

> I looked to the PEPs & didn't find a proposition to remove brackets &
> commas for to make Python func call syntax caml- or tcl- like: instead
> of
> result = myfun(param1, myfun2(param5, param8), param3)
> just make possible using
> result =  myfun param1 (myfun2 param5 param8) param3
If you have
result = func1 func2 arg
is it
result = func1(func2, arg)
or
result = func1(func2(arg))

Miki <miki.tebeka at gmail.com>
http://pythonwise.blogspot.com



From newsuser at stacom-software.de  Thu Mar  8 03:20:20 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Thu, 08 Mar 2007 09:20:20 +0100
Subject: Howto find dict members from a list of keys
Message-ID: <esogs0$41a$1@online.de>

Hello,

what algo do you use, when you want to find the dict values from d, with members 
of l. Following example:

 >>> d = {1:2,2:3,3:4,4:5,5:6,6:7,7:8,8:9,9:10}
 >>> l = [7,8]
 >>> found_dic_members = <yourCode>
 >>> print found_dict_members
[8,9]

Thanks
Alexander


From bj_666 at gmx.net  Wed Mar  7 15:27:33 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 07 Mar 2007 21:27:33 +0100
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
Message-ID: <pan.2007.03.07.20.27.31.110344@gmx.net>

In <1173292373.770519.158490 at 8g2000cwh.googlegroups.com>, Arnaud Delobelle
wrote:

> # This one only works because a,b,c are functions
> # Moreover it seems like an abuse of a loop construct to me
> def rolled_first(x):
>     for f in a, b, c:
>         try:
>             return f(x)
>         except:
>             continue
>     raise CantDoIt
> ----------

Why do you think this is an abuse?  I think it's a perfectly valid use of
a loop.

Ciao,
	Marc 'BlackJack' Rintsch


From cfbolz at gmx.de  Wed Mar 28 04:38:18 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 10:38:18 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175041489.368797.281750@d57g2000hsg.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175041489.368797.281750@d57g2000hsg.googlegroups.com>
Message-ID: <460A297A.5030605@gmx.de>

Hi Luis!

Luis M. Gonz?lez wrote:
 > Carl Friedrich Bolz wrote:
 >> ==========================================
 >> PyPy 1.0: JIT compilers for free and more
 >> ==========================================
[snip]
 >
 >
 > Congratulations!

Thanks :-)

 > I just have a couple of questions:
 >
 > Attempting to execute pypy-c.exe (precompiled binary for Windows),
 > raise an error message indicating that it cannot find gc_pypy.dll.
 > Have you missed something or I'm doing something wrong?

Brain error on our side: the gc_pypy.dll is the dll of the Boehm garbage
collector, which you would need to compile yourself (which makes
precompiled binaries a bit useless :-) ). We updated the zip file, would
you mind checking whether it works better now?

 > Regarding the jit integration, do you have any rough idea of when will
 > it speed up arbitrary code, other than integer aritmethic?

Relatively soon. The hard bits of that are done, the JIT compiler
generator is in a pretty good shape, we need to apply it to more parts
of the PyPy Python interpreter. There are some non-coding related
reasons why we are not doing it _right_ now: we still need to write some
EU-reports (about the JIT for example) then we will need a while to
recover from the EU project.

Cheers,

Carl Friedrich Bolz


From cptnwillard at gmail.com  Mon Mar  5 11:24:33 2007
From: cptnwillard at gmail.com (cptnwillard at gmail.com)
Date: 5 Mar 2007 08:24:33 -0800
Subject: Python GUI + OpenGL
In-Reply-To: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <1173111873.623784.186740@v33g2000cwv.googlegroups.com>

You don't necessarily need an OpenGL wrapper like PyOpenGL. If you
only use a handful of OpenGL functions, it would be relatively
straight-forward to make your own, using ctypes.

Here is what it would look like:

from ctypes import cdll, windll, c_double, c_float, c_int

GL_POINTS         = 0x0000
GL_LINES          = 0x0001
GL_LINE_LOOP      = 0x0002
GL_LINE_STRIP     = 0x0003
GL_TRIANGLES      = 0x0004
GL_TRIANGLE_STRIP = 0x0005
GL_TRIANGLE_FAN   = 0x0006
GL_QUADS          = 0x0007
GL_QUAD_STRIP     = 0x0008
GL_POLYGON        = 0x0009

gl = windll.LoadLibrary("opengl32")

glEnd = gl.glEnd
glEnd.restype = None

glBegin = gl.glBegin
glBegin.argtypes = [c_int]
glBegin.restype = None

glVertex2f = gl.glVertex2d
glVertex2f.argtypes = [c_double, c_double]
glVertex2f.restype = None

glColor3f = gl.glColor3d
glColor3f.argtypes = [c_double, c_double, c_double]
glColor3f.restype = None

glClear = gl.glClear
glClear.argtypes = [c_int]
glClear.restype = None

glClearColor = gl.glClearColor
glClearColor.argtypes = [c_double, c_double, c_double, c_double]
glClearColor.restype = None

glViewport = gl.glViewport
glViewport.argtypes = [c_int, c_int, c_int, c_int]
glViewport.restype = None

[...etc]

Regards,

Laurent

On Mar 2, 4:17 pm, Achim Domma <d... at procoders.net> wrote:
> Hi,
>
> I'm developing a GUI app in Python/C++ to visualize numerical results.
> Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there
> are no windows binaries for Python 2.5 for quite some time now.
>
> I need a OpenGL context without restrictions and some settings dialogs.
> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set
> of tools/libs?
>
> regards,
> Achim




From bignose+hates-spam at benfinney.id.au  Tue Mar 20 18:19:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 21 Mar 2007 09:19:27 +1100
Subject: Exceptions when closing a file
References: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
	<etp7jo$vol$1@rumours.uwaterloo.ca>
	<uKVLh.9516$Um6.3423@newssvr12.news.prodigy.net>
Message-ID: <87k5xb5zio.fsf@benfinney.id.au>

John Nagle <nagle at animats.com> writes:

>      If you want to force [an error while closing a file], write to
> a drive reached over a network, or a removable medium like a floppy
> or flash card.  Open a file for writing and disconnect the network
> or remove the removable medium.

Or simply use a mock library, create a mock file object, and guarantee
(for the purpose of your unit test) that it *will* raise the
appropriate error without interacting with the rest of the system.

-- 
 \     "Ours is a world where people don't know what they want and are |
  `\    willing to go through hell to get it."  -- Donald Robert Perry |
_o__)                                                          Marquis |
Ben Finney



From sickcodemonkey at gmail.com  Mon Mar 12 21:51:27 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Mon, 12 Mar 2007 21:51:27 -0400
Subject: Readline()
In-Reply-To: <1E3F89921C854A49B8307B9716633F0105A516C0@SM-GBLO-XM32.emea.wdpr.disney.com>
References: <1E3F89921C854A49B8307B9716633F0105A516C0@SM-GBLO-XM32.emea.wdpr.disney.com>
Message-ID: <2adc542f0703121851x6dad3b2fg6fb35d5bf3eb77aa@mail.gmail.com>

Maybe if you show us your code we can better assist you.

But maybe you can use a global variable or a try-catch method to keep
threads from staying alive and help better control your code.

On 3/12/07, Taylor, Stuart <Stuart.Taylor at disney.com> wrote:
>
>  I have been working on running an external process using subprocess.popenfor a few days.
> The process is ran over the network to another machine.
> One thing I have found is that if I perform readline() on the stdout it
> will hang if the process loses connection.
>
> I have tried a few things in a test example: one is to use stdin.writethen
> stdin.flush() which send a string that readline() will read and it ends
> correctly but doesn't work on the project I need it to work on. Another is
> to try using threads and ignoar the thread when  the process has lost
> connection but this still leaves the open thread alive even when the main
> app has finished.
>
> I am relatively new to python and I may be making a fundemantal mistake in
> my implementation, can anyone please inform me of whether sticking with
> subprocess.popen and readline() is the correct procedure for this sort of
> task?
>
> And if anyone can point me in the correct implementation of this problem I
> would be gratefull.
>
> Thank you
>
> Stuart
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From mark at freelance-developer.com  Fri Mar 23 19:31:17 2007
From: mark at freelance-developer.com (Mark Nenadov)
Date: Fri, 23 Mar 2007 19:31:17 -0400
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<pan.2007.03.23.21.27.25.328509@freelance-developer.com>
	<mailman.5533.1174687931.32031.python-list@python.org>
Message-ID: <pan.2007.03.23.23.31.14.793622@freelance-developer.com>

On Fri, 23 Mar 2007 19:11:23 -0300, Gabriel Genellina wrote:

> Poor xreadlines method had a short life: it was born on Python 2.1 and got  
> deprecated on 2.3 :(
> A file is now its own line iterator:
> 
> f = open(...)
> for line in f:
>    ...

Gabriel,

Thanks for pointing that out! I had completely forgotten about
that!

I've tested them before. readlines() is very slow. The deprecated
xreadlines() is close in speed to open() as an iterator. In my particular
test, I found the following:

readlines() -> 32 "time units"
xreadlines() -> 0.7 "time units"
open() iterator -> 0.41 "time units"

-- 
Mark Nenadov -> skype: marknenadov, web: http://www.marknenadov.com
-> "They need not trust me right away simply because the British say 
that I am O.K.; but they are so ridiculous. Microphones everywhere 
and planted so obviously. Why, if I bend over to smell a bowl of 
flowers, I scratch my nose on a microphone."
-- Tricyle (Dushko Popov) on American Intelligence



From attn.steven.kuo at gmail.com  Thu Mar 29 11:46:30 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 29 Mar 2007 08:46:30 -0700
Subject: Weird gcc behaviour with function pointer types
In-Reply-To: <571s0vF2aird9U1@mid.individual.net>
References: <571s0vF2aird9U1@mid.individual.net>
Message-ID: <1175183190.252688.194390@r56g2000hsd.googlegroups.com>

On Mar 29, 6:05 am, greg <g... at cosc.canterbury.ac.nz> wrote:
> In my quest to eliminate C compiler warnings from
> Pyrex output, I've discovered some utterly bizarre
> behaviour from gcc 3.3.
>
> The following code:
>
>    void g(struct foo *x) {
>    }
>
>    void f(void) {
>      void (*h)(struct foo *);
>      h = g;
>    }
>
> produces the following warning:
>
>    blarg.c: In function `f':
>    blarg.c:6: warning: assignment from incompatible pointer type
>
> However, adding the following line at the top:
>
>    typedef struct foo Foo;
>
> makes the warning go away. The mere *presence* of
> the typedef is all that's needed -- it doesn't even
> have to be used.
>
> This looks like a bug in gcc to me -- what do people
> think?



Was there no (forward) declaration nor
definition of struct foo ahead of your functions?

I get no warnings with this:


struct foo; /* forward declaration */

void g(struct foo *x) {
}

void f(void) {
    void (*h)(struct foo *);
    h = g;
}


Using:

Target: powerpc-apple-darwin8
Configured with: /private/var/tmp/gcc/gcc-5026.obj~19/src/configure --
disable-checking --prefix=/usr --mandir=/share/man --enable-
languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^+.-]*$/s/
$/-4.0/ --with-gxx-include-dir=/include/gcc/darwin/4.0/c++ --
build=powerpc-apple-darwin8 --host=powerpc-apple-darwin8 --
target=powerpc-apple-darwin8
Thread model: posix

gcc version 4.0.0 (Apple Computer, Inc. build 5026)

--
Hope this helps,
Steven



From jon+usenet at unequivocal.co.uk  Sat Mar 10 20:44:43 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 11 Mar 2007 01:44:43 GMT
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
	<2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>
Message-ID: <slrnev6nob.oj9.jon+usenet@snowy.squish.net>

In article <2uEIh.14274$bb1.6709 at newssvr17.news.prodigy.net>, John Nagle wrote:
>     Is the "egg" packaging gimmick considered mainstream Python, or just some
> wierd idea from the "Peak" people?  It seems to complicate installation
> without adding much value.

I don't know, but stock Python 2.5 seems to stick mysterious '.egg'
files in the site-packages directory when you install things.


From eglaser at gmail.com  Thu Mar 15 08:25:34 2007
From: eglaser at gmail.com (eglaser at gmail.com)
Date: 15 Mar 2007 05:25:34 -0700
Subject: spawn process in a new console window
In-Reply-To: <1173931166.767205.220880@l77g2000hsb.googlegroups.com>
References: <1173923782.156260.299930@p15g2000hsd.googlegroups.com>
	<1173931166.767205.220880@l77g2000hsb.googlegroups.com>
Message-ID: <1173961534.540302.153840@e1g2000hsg.googlegroups.com>



Greg,

Thanks for the tip.  I will check out subprocess.

Eli



From s99999999s2003 at yahoo.com  Thu Mar 29 03:40:20 2007
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 29 Mar 2007 00:40:20 -0700
Subject: which methods to use?
In-Reply-To: <pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
Message-ID: <1175154020.467194.40000@b75g2000hsg.googlegroups.com>

On Mar 29, 12:56 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> On Wed, 28 Mar 2007 18:16:31 -0700, s99999999s2003 wrote:
> > what do you mean by create new object when using list comprehensoin or
> > list()? Does using slicing create a new object as well?
>
> Yes it does.
>
> >>> alist = [1, 2, 4, 8, 16]
> >>> blist = alist # not a copy
> >>> id(alist) == id(blist)
> True
> >>> blist = alist[:] # a copy
> >>> id(alist) == id(blist)
>
> False
>
> By the way, "id(obj) == id(another_object)" is just a long way of writing
> "obj is another_object".
>
> In general:
>
> - use a list comprehension when you need to calculate the list items
>
> - use slicing when you are copying an actual list, or if you don't care
> what type of object you get
>
> - use the list() function when your existing object might not be an actual
> list, and you want the copy to be a list.
>
> E.g.
>
> atuple = (1, 2, 3)
> alist = [2*n+3 for n in atuple]
> btuple = atuple[:]
> blist = list(atuple)
>
> --
> Steven.


hi thanks
under what circumstances do we need to create a copy of a tuple :->
"btuple = atuple[:]". tuples are immutable, so wouldn't it be "wasting
memory"?
another query, in the docs, list(a) and a[:] does the same thing (a =
[1,2,3] for example), but besides the speed of slicing is faster than
list(), what advantage is there for using list(a) in this case ?
thanks



From ptmcg at austin.rr.com  Mon Mar 19 11:43:33 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 19 Mar 2007 08:43:33 -0700
Subject: When is List Comprehension inappropriate?
In-Reply-To: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
Message-ID: <1174319013.877076.254990@d57g2000hsg.googlegroups.com>

On Mar 19, 9:41 am, "Ben" <bensher... at gmail.com> wrote:
> even = []
> for x in range(0,width,2):
>     for y in range(0,height,2):
>         color = im.getpixel((x,y))
>         even.append(((x,y), color))
>
> versus list comprehension:
>
> even2 = [((x,y), im.getpixel((x,y))) for x in range(0,width,2) for y
> in range(0,height,2)]
>

To simplify access to individual pixels, you can make even2 into a
dict using:

  even2asDict = dict(even2)

and then you can directly get the pixel in the 4th row, 5th column
(zero-based) as:

  even2asDict[(4,5)]

If you really want something more like a 2-D array, then create a list
comp of lists, as in:

  even2 = [ [im.getpixel((x,y)) for x in range(0,width,2) ]
             for y in range(0,height,2) ]

which allows you to use list indexing to get individual pixel values,
as in:

  even2[4][5]

to get the same pixel as above.

-- Paul



From nagle at animats.com  Thu Mar 29 12:54:55 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 29 Mar 2007 09:54:55 -0700
Subject: BeautifulSoup vs. Microsoft
In-Reply-To: <Xns99025B6FD25CFduncanbooth@127.0.0.1>
References: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
	<Xns99025B6FD25CFduncanbooth@127.0.0.1>
Message-ID: <fbSOh.4$zC.2@newssvr22.news.prodigy.net>

Duncan Booth wrote:
> John Nagle <nagle at animats.com> wrote:
> 
> 
>>Strictly speaking, it's Microsoft's fault.
>>
>>     title="<!--http://www.microsoft.com/usability/information.mspx->"
>>
>>is supposed to be an HTML comment.  But it's improperly terminated.
>>It should end with "-->".  So all that following stuff is from what
>>follows the next "-->" which terminates a comment.
> 
> 
> It is an attribute value, and unescaped angle brackets are valid in 
> attributes. It looks to me like a bug in BeautifulSoup.

    I think you're right.  The HTML 4 spec,

	http://www.w3.org/TR/html4/intro/sgmltut.html

says "Note that comments are markup".  So recognizing comment syntax
inside an attribute is, in fact, an error in BeautifulSoup.

    The source HTML on the Microsoft page is thus syntactically correct,
although meaningless.  That's the only place on that page with a
comment-type form in an attribute.

				John Nagle


From skip at pobox.com  Tue Mar  6 15:19:54 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 6 Mar 2007 14:19:54 -0600
Subject: calendar (date) iterator?
In-Reply-To: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
References: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
Message-ID: <17901.52458.587405.966208@montanaro.dyndns.org>


    Marcus> I'm looking for useful starting points, suggestions, and sample
    Marcus> code, to implement a calendar iterator.  

Have you looked at dateutil?

    http://labix.org/python-dateutil

    >>> from dateutil.rrule import rrule, DAILY
    >>> from dateutil.parser import parse
    >>> rule = rrule(DAILY, count=5, dtstart=parse("2006-03-12"))
    >>> for d in rule:
    ...   print d
    ...
    2006-03-12 00:00:00
    2006-03-13 00:00:00
    2006-03-14 00:00:00
    2006-03-15 00:00:00
    2006-03-16 00:00:00

Skip


From magoldfish at gmail.com  Tue Mar  6 14:58:56 2007
From: magoldfish at gmail.com (Marcus)
Date: 6 Mar 2007 11:58:56 -0800
Subject: calendar (date) iterator?
In-Reply-To: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
References: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
Message-ID: <1173211136.874431.267910@p10g2000cwp.googlegroups.com>

Oops-- the iter needs to work better than I do! :)

> > iter = calendarIterator("03-12-2006")
> > print iter.next()
>
>    03-12-2006
     ^^^^^^^^^^
     03-13-2006


> > iter = calendarIterator("03-12-2006 01:00:00", "minutes")
> > print iter.next()
>
>    03-12-2006 01:01:00
     ^^^^^^^^^^
     03-13-2006



From nogradi at gmail.com  Fri Mar 23 15:12:35 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Fri, 23 Mar 2007 20:12:35 +0100
Subject: Join strings - very simple Q.
In-Reply-To: <87ejnfzsoi.fsf@rudin.co.uk>
References: <1174675011.244339@jubilee.claranet.pt>
	<87ejnfzsoi.fsf@rudin.co.uk>
Message-ID: <5f56302b0703231212n1125cb08m841b76f7d99ddf62@mail.gmail.com>

> > I was told in this NG that string is obsolet. I should use
> > str methods.
> >
> > So, how do I join a list of strings delimited by a given
> > char, let's say ','?
> >
> > Old way:
> >
> > l=['a','b','c']
> > jl=string.join(l,',')
> >
> > New way?
>
> Dunno if it's the "new way", but you can do: ''.join(l)

The OP wants the strings to be comma delimited:

jl=','.join(l)


From uwe.grauer at onlinehome.de  Sun Mar 11 17:59:12 2007
From: uwe.grauer at onlinehome.de (Uwe Grauer)
Date: Sun, 11 Mar 2007 22:59:12 +0100
Subject: a better solution for GUI in python
In-Reply-To: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <et1u3m$c2s$1@online.de>

ce wrote:
> Hi,
> 
> My company is using python currently for our website. We need to
> develop a GUI front-end for our ERP that would be portable (Windows
> and Linux).
> 
> My question is which solution would be better for the GUI (and easier
> to implement)? I knew there are something like wxidgets, QT and pyGTK?
> actually we will need some complicated stuff in the GUI and yet I
> don't know much about GUI programming.
> 
> Any recommendation guys?
> 

Take a look at Dabo.
It is using wxWidgets and runs on Windows, Mac, Linux.
http://www.dabodev.com

Uwe



From deets at nospam.web.de  Tue Mar 20 06:37:55 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 Mar 2007 11:37:55 +0100
Subject: python & java
References: <1174382587.768401.158010@p15g2000hsd.googlegroups.com>
Message-ID: <569rs3F27v71vU2@mid.uni-berlin.de>

sandeep patil wrote:

> hi
> 
> i am fresher i python can any bady tell me who i will use python in
> web technologies in java base application.
> what it roll

No idea where who rolls to whom, but you should check out jython:

http://www.jython.org/

Diez


From kyosohma at gmail.com  Tue Mar 20 14:10:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 11:10:45 -0700
Subject: Subject line with smtplib.sendmail()
In-Reply-To: <mailman.5350.1174413191.32031.python-list@python.org>
References: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com>
	<etotbk$b1c$1@sea.gmane.org>
	<mailman.5350.1174413191.32031.python-list@python.org>
Message-ID: <1174414245.021337.237380@y66g2000hsf.googlegroups.com>

On Mar 20, 12:50 pm, "Boudreau, Emile" <Emile.Boudr... at cognos.com>
wrote:
> Thanks for the reply. When I use the instruction from that list this is
> the email I receive. I'm using Outlook.
>
> Working... at server.com
> To:
> ------------------------------
>         From: Working... at server.com
>         To: Emile.Boudr... at server.com
>         Subject: Hello!
>
>         This Still DOESN't Work!!!!!!!!!!!!
>
> It's just adding the "From" "To" "Subject" in the message itself. I want
> to have each field at the correct place and then just the msg in the
> body.
>
> Any Help?? Thanks
>
> Emile Boudreau
>
> -----Original Message-----
> From: python-list-bounces+emile.boudreau=cognos.... at python.org
>
> [mailto:python-list-bounces+emile.boudreau=cognos.... at python.org] On
> Behalf Of Fredrik Lundh
> Sent: Tuesday, March 20, 2007 11:08 AM
> To: python-l... at python.org
> Subject: Re: Subject line with smtplib.sendmail()
>
> Boudreau, Emile wrote:
>
> > I'm trying to send mail from my server to my machine with test
> > results. I can send the email no problem however, the email doesn't
> > contain a "recipient list" or a "subject line". I was wondering how
> > would I go about getting the information on the actual "To" and
> > "Subject" lines so that I know to whom the email was sent and the
> > subject line without opening the email?
>
> you have to add the headers yourself.  see the example in the library
> reference, or this FAQ entry:
>
>    http://effbot.org/pyfaq/how-do-i-send-mail-from-a-python-script
>
> </F>
>
> --http://mail.python.org/mailman/listinfo/python-list
>
>      This message may contain privileged and/or confidential information.  If you have received this e-mail in error or are not the intended recipient, you may not use, copy, disseminate or distribute it; do not open any attachments, delete it immediately from your system and notify the sender promptly by e-mail that you have done so.  Thank you.

I'm not sure what the problem is. But here's how we do it at my place
of work:


import smtplib
import string

def sendMail(subject, body, TO = "email at emailaddress.com",
              FROM="anotheremail at emailaddress.com"):
    HOST = "mailserver"
    BODY = string.join((
        "From: %s" % FROM,
        "To: %s" % TO,
        "Subject: %s" % subject,
        "",
        body
        ), "\r\n")
    server = smtplib.SMTP(HOST)
    server.sendmail(FROM, [TO], BODY)
    server.quit()


This works well for us.

Mike



From seberino at spawar.navy.mil  Sun Mar  4 12:42:36 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 4 Mar 2007 09:42:36 -0800
Subject: How use XML parsing tools on this one specific URL?
Message-ID: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>

I understand that the web is full of ill-formed XHTML web pages but
this is Microsoft:

http://moneycentral.msn.com/companyreport?Symbol=BBBY

I can't validate it and xml.minidom.dom.parseString won't work on it.

If this was just some teenager's web site I'd move on.  Is there any
hope avoiding regular expression hacks to extract the data from this
page?

Chris



From sjmachin at lexicon.net  Sat Mar 17 05:30:48 2007
From: sjmachin at lexicon.net (John Machin)
Date: 17 Mar 2007 02:30:48 -0700
Subject: Odd error
In-Reply-To: <1174109684.594766.320600@l77g2000hsb.googlegroups.com>
References: <1174109684.594766.320600@l77g2000hsb.googlegroups.com>
Message-ID: <1174123848.763283.54840@e65g2000hsc.googlegroups.com>

On Mar 17, 4:34 pm, "Joshua.R.Engl... at gmail.com"
<Joshua.R.Engl... at gmail.com> wrote:
> I'm trying to use a script that I originally wrote on a Mac Classic
> machine and have moved to a Windows XP machine.
>
> I can open the script and edit the thing, but when I try to run it in
> I get:
> Exception in Tkinter callback
> Traceback (most recent call last):
>   File "C:\Python25\lib\lib-tk\Tkinter.py", line 1403, in __call__
>     return self.func(*args)
>   File "C:\Python25\lib\idlelib\MultiCall.py", line 151, in handler
>     r = l[i](event)
>   File "C:\Python25\lib\idlelib\ScriptBinding.py", line 151, in
> run_module_event
>     dirname = os.path.dirname(filename)
>   File "C:\Python25\lib\ntpath.py", line 207, in dirname
>     return split(p)[0]
>   File "C:\Python25\lib\ntpath.py", line 172, in split
>     while head2 and head2[-1] in '/\\':
> TypeError: 'int' object is not iterable
>
> I've converted the text to windows format, and the other scripts that
> I transferred at the same time work.
>
> What's going on here?

The following demonstrate the correct behaviour of ntpath.split():

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import ntpath
>>> ntpath.split('foo\\\\')
('foo', '')
>>> ntpath.split('foo\\\\bar\\\\')
('foo\\\\bar', '')
>>> ntpath.split('foo\\\\bar')
('foo', 'bar')
>>> ntpath.split('foo\\bar')
('foo', 'bar')
>>> ntpath.split('\\\\bar')
('\\\\', 'bar')

I can't see how this error could arise from the line:
while head2 and head2[-1] in '/\\':
The only possible iterable is the constant '/\\' ...

You may have a corrupt Python 2.5 installation; try the above tests;
if one fails, delete any ntpath.pyc and/or ntpath.pyo and try again.

I'm suspicious of the 'lib' directory name; standard Python
installations on Windows call the directory 'Lib' AFAIK; how did you
install Python?

HTH,
John



From simon at brunningonline.net  Fri Mar  9 11:24:39 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 9 Mar 2007 16:24:39 +0000
Subject: Is this right? Multiple imports of same module.
In-Reply-To: <pecora-0239F9.11184709032007@ra.nrl.navy.mil>
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<pan.2007.03.09.15.33.01.991831@gmx.net>
	<pecora-0239F9.11184709032007@ra.nrl.navy.mil>
Message-ID: <8c7f10c60703090824r2c59fa71m5e8cd8a4efc6f820@mail.gmail.com>

On 3/9/07, Lou Pecora <pecora at anvil.nrl.navy.mil> wrote:
> I have noticed that using from xxx import * can lead to problems when
> trying to access variables in the xxx module.

Don't do it, then. ;-)

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From gagsl-py2 at yahoo.com.ar  Mon Mar  5 20:29:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 Mar 2007 22:29:55 -0300
Subject: Getting stdout from ctypes module
References: <1172832895.643439.204480@h3g2000cwc.googlegroups.com>
Message-ID: <op.toquf5vpx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 Mar 2007 07:54:55 -0300, Massi <massi_srb at msn.com> escribi?:

> Hi everyone, I have a program which is written in C and interfaced
> with python via
> Ctypes.  The functions I call print stuff out to the console, using
> the usual function printf. I would like to know if it is possible to
> redirect the output of my C module to python. I'm working on windows
> environment. Thanks in advance.

Is it a DLL or a program?
For a program I don't see how you could use ctypes to invoke things - and  
for a DLL it's strange to use printf for output.
If you run it as a program, try the subprocess module.

-- 
Gabriel Genellina



From ianmurrays at gmail.com  Sat Mar 17 21:51:14 2007
From: ianmurrays at gmail.com (Synt4x)
Date: 17 Mar 2007 18:51:14 -0700
Subject: Webcams and python
Message-ID: <1174182674.500068.252550@p15g2000hsd.googlegroups.com>

I'm using VideoCapture in windows to obtain images from my webcam. The
thing is, if i want to show a live video from my webcam i have to make
an infinite loop and request an image everytime:

from VideoCapture import Device
cam = Device()

while 1:
    img = cam.getImage()

Now, by doing this, my processor fires up to 100% load, which
obviously makes my pc useless.

Is there any way or algorithm to lower the cpu load?

Thx.



From arcsecond at gmail.com  Thu Mar  1 15:07:31 2007
From: arcsecond at gmail.com (arcsecond at gmail.com)
Date: 1 Mar 2007 12:07:31 -0800
Subject: wxPython button binding in XSI
Message-ID: <1172779651.749470.158710@h3g2000cwc.googlegroups.com>

I feel like an idiot. I've been struggling with this for 4 days. I can
make a window but I can't seem to close them. I think I've narrowed
down the problem being with my button event bindings. They don't seem
to take. But I don't get any errors either. So am I missing something?

Any help would be appreciated. Thanks in advance.

I'm building a tool in XSI 6.0 based on this:
http://www.xsi-blog.com/archives/138\
I've copied the XSISubFrame exactly.

My specific app looks like this:

<code>
class jpFrame(XSISubFrame):
	def __init__(self, parent, app):
		XSISubFrame.__init__(self, parent, app, -1, 'jpPointOven',
size=(100, 140))
		self.panel = jpPanel(self)


	def OnClose(self, event):
		"""
		This method is bound by XSISubFrame to the EVT_CLOSE event.
		It shows a modal dialog before closing.
		Notice the win32gui hack to disable the XSI top-level window during
the modal time.
		"""
		dlg = wx.MessageDialog(None, 'Are you sure?', 'Sure?')
		if self.showModalDialog(dlg) == wx.ID_OK:
			self.panel.onWindowClose()
			XSISubFrame.OnClose(self, event)



class jpPanel(wx.Panel):
	_runningInstances = []
	def __init__(self, parent):
		wx.Panel.__init__(self, parent, -1)
		self.frame = parent

		selectAllButton = wx.Button(self, -1, "Select*GEO")
		self.Bind(wx.EVT_BUTTON, self.selectAllGeo, selectAllButton)
		selectHeirButton = wx.Button(self, -1, "Select Heir *GEO")
		self.Bind(wx.EVT_BUTTON, self.selectHierGeo, selectHeirButton)

		btn = wx.Button(self, -1, "Close")
		self.Bind(wx.EVT_BUTTON, self.OnClose, btn)
		self.Bind(wx.EVT_CLOSE, self.OnClose)

		scenesFile = r"scenes.txt"
		scenes = self.jpReadLines(scenesFile)
		scenesList = wx.Choice(self, -1, choices=scenes)

		deformButton = wx.Button(self, -1, "Deform Selected")
		self.Bind(wx.EVT_BUTTON, self.applyDeformers, deformButton)

		tID = wx.NewId()

		sizer = wx.BoxSizer(wx.VERTICAL)
		sizer.Add(selectAllButton, 0, wx.ALL)
		sizer.Add(selectHeirButton, 0, wx.ALL)
		sizer.Add(scenesList, 0, wx.ALL)
		sizer.Add(deformButton, 0, wx.ALL)
		sizer.Add(btn, 0, wx.ALL)
		self.SetSizer(sizer)
		self.Layout()
		self.SetSize(sizer.GetSize())
		self.SetAutoLayout(True)
		self.frozen = False

		self.Show(True)
		jpPanel._runningInstances.append(self)


	def selectAllGeo(self,event):
		Application.LogMessage("This is a test: selectAllGeo")

		Application.selectobj('*GEO')

	def selectHierGeo(self, event):
		Application.LogMessage("This is a test: selectHeirGeo")

		Application.SelectTree()
		model = Application.Selection[0]
		Application.selectobj(model.FindChildren('*GEO'))

	def jpReadLines(self, fileToRead):
		lines = []
		badLines = []

		if os.path.exists(fileToRead) == False:
			print "File Not Found"
		else:
			thisFile = file(fileToRead, "r+")
			badLines = thisFile.readlines()
			thisFile.close()
		for i in range(0, len(badLines)):
			lines.append(badLines[i].strip())
		return lines

	def applyDeformers(self, event):
		Application.LogMessage("This is a test: applyDeformers")

		path = self.poPath
		scene = self.sceneList.get()
		objs = Application.Selection
		for thisObj in objs:
			try:
				Application.SetValue(str(thisObj) + ".polymsh.PO_XSI_Reader.Mute",
0, "")
				splitObj = re.split("\.", str(thisObj))
				thisPath = (path + os.sep + scene + os.sep + str(splitObj[0]) +
os.sep + str(splitObj[-1]) + ".mdd")
				Application.LogMessage(thisPath)
				Application.SetValue(str(thisObj) +
".polymsh.PO_XSI_Reader.FileName", (path + os.sep + scene + os.sep +
str(splitObj[0]) + os.sep + str(splitObj[-1]) + ".mdd"), "")
			except:
				Application.ApplyOp("POXSI", str(thisObj), "siUnspecified",
"siPersistentOperation", "", 0)
				Application.AddExpr((str(thisObj) +
".polymsh.PO_XSI_Reader.POTime"), "T", 1)
				Application.SetValue(str(thisObj) + ".polymsh.PO_XSI_Reader.Mute",
0, "")
				splitObj = re.split("\.", str(thisObj))
				thisPath = (path + os.sep + scene + os.sep + str(splitObj[0]) +
os.sep + str(splitObj[-1]) + ".mdd")
				Application.LogMessage(thisPath)
				Application.SetValue(str(thisObj) +
".polymsh.PO_XSI_Reader.FileName", (path + os.sep + scene + os.sep +
str(splitObj[0]) + os.sep + str(splitObj[-1]) + ".mdd"), "")


	def onWindowClose(self):
		jpPanel._runningInstances.remove(self)

	def OnClose(self, evt):
		"""Event handler for the button click."""
		self.frame.Close()



jpFrame.create()
</code>



From MrJean1 at gmail.com  Mon Mar  5 15:11:30 2007
From: MrJean1 at gmail.com (MrJean1)
Date: 5 Mar 2007 12:11:30 -0800
Subject: How to create pid.lock via python?
In-Reply-To: <mailman.4669.1173085929.32031.python-list@python.org>
References: <mailman.4669.1173085929.32031.python-list@python.org>
Message-ID: <1173125489.841818.174470@64g2000cwx.googlegroups.com>

May this works for your case

  <http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498171>.

/Jean Brouwers


On Mar 5, 3:12 am, Marco <m... at waven.com> wrote:
> Hello,
>
> I write a program control a device via RS232, I hope to add some code
> to let the program canNOT be used by other people when one people
> using.
>
> Can you tell me how to create pid.lock file in python?
> Thank you!!
>
> --
> LinuX Power



From rdm at rcblue.com  Tue Mar 27 06:26:07 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 27 Mar 2007 03:26:07 -0700
Subject: SPE question
In-Reply-To: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
References: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
Message-ID: <20070327102622.D67981E4006@bag.python.org>

At 01:39 AM 3/27/2007, alain wrote:
>Hi,
>
>Could someone tell me how to uninstall SPE under windows?

Well, mine is in E:\Python25\Lib\site-packages\_spe, so I'd try 
deleting that folder.

Dick Moores 



From kevinliu23 at gmail.com  Thu Mar  1 09:55:57 2007
From: kevinliu23 at gmail.com (kevinliu23)
Date: 1 Mar 2007 06:55:57 -0800
Subject: How to check for remaining hard drive space in Windows?
In-Reply-To: <mailman.4558.1172740595.32031.python-list@python.org>
References: <1172694391.256770.234450@j27g2000cwj.googlegroups.com>
	<2adc542f0702281259q3ab2ac1dr8e76e6157f96537b@mail.gmail.com>
	<mailman.4531.1172697404.32031.python-list@python.org>
	<1172697850.946627.196420@a75g2000cwd.googlegroups.com>
	<1172699693.411268.153760@j27g2000cwj.googlegroups.com>
	<mailman.4558.1172740595.32031.python-list@python.org>
Message-ID: <1172760956.942727.112190@j27g2000cwj.googlegroups.com>

Thanks Tim,

I only need to run the get hard drive space function on one drive for
one machine so I'll stick to GetDiskFreeSpace. If I need to expand
this feature to multiple harddrives/machines, I'll be sure to come
back to this thread. :)

Kevin

On Mar 1, 4:17 am, Tim Golden <m... at timgolden.me.uk> wrote:
> kevinliu23 wrote:
> > Just tried your solution Tim, worked like a charm. :)
>
> > It's great because I don't even have to worry about the computer name.
> > A question regarding the rootPath parameter...how would I be passing
> > it? Would I be passing it as...
>
> >    tuple = win32api.GetDiskFreeSpace(r'C:')
> > or just leave it blank and the function will automatically use the
> > rootPath of where the .py file resides?
>
> > Both have returned the correct result.
>
> The simple answer is: I'm not sure. If you experiment and find
> something which works, just use it!
>
> Something which SickMonkey made me return to your question.
> Are you trying to find the disk space available on a
> different machine (possibly on several different machines)?
> If so, then WMI is definitely your answer. You can
> run -- from your machine -- one piece of code which
> will attach to several different machines to give
> you the answer. (as per Sick Monkey's later post).
>
> If I've read too much into your question, well nothing's
> ever wasted on the internet. Here's some sample code
> which uses the wmi module from:
>
>    http://timgolden.me.uk/python/wmi.html
>
> <code>
> machines = ['mycomp', 'othercomp']
>
> for machine in machines:
>    print "Machine:", machine
>    c = wmi.WMI (machine)
>    # only consider local fixed disks
>    for disk in c.Win32_LogicalDisk (DriveType=3):
>      print disk.Name, disk.FreeSpace
>    print
>
> </code>
>
> Yes, you could even write:
>
>    for disk in wmi.WMI (machine).Win32_LogicaDisk (DriveType=3):
>
> but I'd find it a touch unwieldy. YMMV.
>
> HTH
> TJG




From a.wyrwa at gmx.de  Wed Mar 28 07:27:05 2007
From: a.wyrwa at gmx.de (=?ISO-8859-1?Q?Andr=E9?= Wyrwa)
Date: Wed, 28 Mar 2007 21:27:05 +1000
Subject: pygtk: how to make a screenlocking window?
Message-ID: <1175081225.9150.10.camel@callisto.io>

Hi,

can anyone please point me to the relevant pygtk window properties i
need to set to make a window
- fullscreen
- stay in front
- grab all input focus
so that i can use it as a screen lock the likes that gksu or
gnome-power-manager do?

Thanks.
Andr?.

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From B.Ogryczak at gmail.com  Tue Mar 13 13:31:09 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 13 Mar 2007 10:31:09 -0700
Subject: Communicating with a DLL under Linux
In-Reply-To: <mailman.5023.1173805183.32031.python-list@python.org>
References: <mailman.5023.1173805183.32031.python-list@python.org>
Message-ID: <1173807068.943335.38270@p10g2000cwp.googlegroups.com>

On Mar 13, 5:59 pm, Mikael Olofsson <mik... at isy.liu.se> wrote:
> If the vendor claims that the DLL is for Windows, is it
> reasonable to assume that it can be made to work under Linux, from
> Python, that is?

No. It's reasonable to assume, that there is no *easy* way to get
Win32's DLL working under unices. There are hackish ways, for example
MPlayer does support Win32's DLL codecs.
Linux/Unix shared libraries have completely different file format
(usually ELF).

http://en.wikipedia.org/wiki/Dynamic-link_library
http://en.wikipedia.org/wiki/Executable_and_Linkable_Format
http://en.wikipedia.org/wiki/Shared_library#Naming



From mark.dufour at gmail.com  Sat Mar 31 05:55:22 2007
From: mark.dufour at gmail.com (Mark Dufour)
Date: Sat, 31 Mar 2007 11:55:22 +0200
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
Message-ID: <8180ef690703310255q55572efaqc512b968504e2c1b@mail.gmail.com>

Hi all,

I have recently released version 0.0.20 and 0.0.21 of Shed Skin, an
optimizing Python-to-C++ compiler. Shed Skin allows for translation of
pure (unmodified), implicitly statically typed Python programs into
optimized C++, and hence, highly optimized machine language. Besides
many bug fixes and optimizations, these releases add the following
changes:

-support for 'bisect', 'collections.deque' and 'string.maketrans'
-improved 'copy' support
-support for 'try, else' construction
-improved error checking for dynamic types
-printing of floats is now much closer to CPython

For more details about Shed Skin and a collection of 27 programs, at a
total of about 7,000 lines, that it can compile (resulting in an
average speedup of about 39 times over CPython and 11 times over Psyco
on my computer), please visit the homepage at:

http://mark.dufour.googlepages.com

I could really use more help it pushing Shed Skin further. Simple ways
to help out, but that can save me lots of time, are to find smallish
code fragments that Shed Skin currently breaks on, and to help
improve/optimize the (C++) builtins and core libraries. I'm also
hoping someone else would like to deal with integration with CPython
(so Shed Skin can generate extension modules, and it becomes easier to
use 'arbitrary' external CPython modules such as 're' and 'pygame'.)
Finally, there may be some interesting Master's thesis subjects in
improving Shed Skin, such as transforming heap allocation into stack-
and static preallocation, where possible, to bring performance even
closer to manual C++. Please let me know if you are interested in
helping out, and/or join the Shed Skin mailing list.


Thanks!
Mark Dufour.
-- 
"One of my most productive days was throwing away 1000 lines of code"
- Ken Thompson


From nszabolcs at gmail.com  Tue Mar 13 05:36:43 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 13 Mar 2007 02:36:43 -0700
Subject: Request for a change in the csv module.
In-Reply-To: <1173747644.616698@jubilee.claranet.pt>
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
	<1173747644.616698@jubilee.claranet.pt>
Message-ID: <1173778603.886135.203140@64g2000cwx.googlegroups.com>


> It would be much better to be able to specify an additional
> variabel to the Dialect class and change csv.

no it wouldn't
this is a locale specific problem so it should be handled there



From gmessmer at u.washington.edu  Fri Mar  2 17:58:37 2007
From: gmessmer at u.washington.edu (Gordon Messmer)
Date: Fri, 02 Mar 2007 14:58:37 -0800
Subject: thread safe SMTP module
Message-ID: <45E8AC1D.80600@u.washington.edu>

I believe that I've seen this discussed previously, so maybe there's 
some interest in it.  I wrote a threaded mail filtering framework a 
while ago, and one of the modules does address verification via SMTP.  
Since smtplib.SMTP uses blocking IO, it can block the whole 
interpreter.  Sometimes the whole thing would stop working indefinitely.

I'm now aware that Twisted offers a non-blocking SMTP class, but I 
didn't really want to make that a dependency of the address 
verification.  I ended up subclassing the smtplib.SMTP class and 
rewriting the functions that do I/O.  Perhaps someone who doesn't want 
to install Twisted will find this class useful, someday.  It doesn't 
support TLS, but it is otherwise a thread-safe SMTP class.


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From http  Tue Mar 13 19:14:10 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 15:14:10 -0800
Subject: help!! *extra* tricky web page to extract data from...
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
	<55oli1F25u2dmU1@mid.uni-berlin.de>
	<7xmz2gbx6r.fsf@ruckus.brouhaha.com>
	<55omooF25ll0vU1@mid.uni-berlin.de>
	<7x1wjskbs7.fsf@ruckus.brouhaha.com>
	<55op6uF24n2biU1@mid.uni-berlin.de>
Message-ID: <7xy7m0eny5.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:
> Obviously this wouldn't really help, as you can't predict what a
> website actually wants which events, in possibly which
> order. Especially if the site does not _want_ to be scrapable- think
> of a simple "click on the images in the order of the numbers shown on
> them" captcha.

Sure, but most sites don't go to such lengths, and even captchas can
be defeated if you're trying to scrape a specific site and are willing
to spend effort on the particular captcha generator that it uses.
Plus there is always www.captchasolver.com (!).

> Most time it's easier to sniff the http stream & grab the data directly.

Certainly true, but there are times when you have to pull stuff out of
the JS.  It's usually possible to do that without actually
interpreting the JS, but an interpreter would make it a lot more
convenient some of the time.


From spamtrap at dot-app.org  Thu Mar 22 08:45:56 2007
From: spamtrap at dot-app.org (Sherm Pendley)
Date: Thu, 22 Mar 2007 08:45:56 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnfxDTKdi5J_bnZ2dnUVZ_uzinZ2d@comcast.com>
Message-ID: <m2slbxbg57.fsf@local.wv-www.com>

Lew <lew at nospam.lewscanon.com> writes:

> Jim Burton wrote:
>> Or you could stop feeding the trolls.
>
> Does not apply. The OP was not being trollish

You obviously don't know Xah. He's been doing this for years, cross-
posting to various language groups trying to start an argument between
them. He even brags about being a troll on his web site.

sherm--

-- 
Web Hosting by West Virginians, for West Virginians: http://wv-www.net
Cocoa programming in Perl: http://camelbones.sourceforge.net


From gagsl-py2 at yahoo.com.ar  Mon Mar 19 20:25:45 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 21:25:45 -0300
Subject: Passing arguments to a command line from a python script
References: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>
Message-ID: <op.tpgos7acx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 Mar 2007 20:46:56 -0300, Luis M. Gonz?lez <luismgz at gmail.com>  
escribi?:

> What I want now is execute the script I just created.
> As far as I know, the only way to execute the script is from a command
> line and typing "setup.py py2exe".

A few ways:
- os.system("commandline"). Simplest way, but you don't have much control,  
and it blocks until the process finishes.
- os.popen[234]? or the functions in the popen2 module
- the subprocess module - the most complete way, but simple enough for  
most cases.

-- 
Gabriel Genellina



From jfine at pytex.org  Tue Mar 20 12:30:43 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 20 Mar 2007 16:30:43 +0000
Subject: Wanted: a python24 package for Python 2.3
References: <45FFFEB6.2080403@pytex.org>
	<1174406681.405930.237930@e1g2000hsg.googlegroups.com>
Message-ID: <46000C33.3060800@pytex.org>

kyosohma at gmail.com wrote:
> On Mar 20, 10:33 am, Jonathan Fine <j... at pytex.org> wrote:

>>My problem is that I want a Python 2.4 module on
>>a server that is running Python 2.3.  I definitely
>>want to use the 2.4 module, and I don't want to
>>require the server to move to Python 2.4.

> You might be able to use the "from future import SomeModule" syntax to
> accomplish this, but I am not sure. Other than that, I would just
> recommend using the os.popen calls that are native to 2.3

I've already made my mind up.  I want to use subprocess on
both 2.3 and 2.4.  To do this, 2.3 sites have to have a copy
of the subprocess module.

My question (snipped) is how best to package this up.

best regards


Jonathan



From http  Mon Mar  5 22:19:38 2007
From: http (Paul Rubin)
Date: 05 Mar 2007 19:19:38 -0800
Subject: Is every number in a list in a range?
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<7xk5xvgo55.fsf@ruckus.brouhaha.com>
	<1173149481.694255.23350@n33g2000cwc.googlegroups.com>
	<7x7itvt6nw.fsf@ruckus.brouhaha.com>
	<1173150785.768534.286700@8g2000cwh.googlegroups.com>
Message-ID: <7xmz2r83ed.fsf@ruckus.brouhaha.com>

"MonkeeSage" <MonkeeSage at gmail.com> writes:
> If you want to preserve the items after 46, then you can't just bail
> when you see 46. You need to keep looking at the following values and
> comparing them against the boundry conditions. If the the input is
> sequential, then this isn't a problem, as all items above 46 are out
> of range....but if the input is arbitrary, then you have to look at
> each index individually as you know. So it really comes down to if the
> data set is ordered or arbitrary as to which approach is more
> efficient.

OK, I didn't read the question that way.  I thought the person just
wanted a yes or no answer to whether the list contained any elements
outside the desired range.  If the purpose is to select the elements
in the range, then use filter/ifilter or a different listcomp/genexp:

   inrange = [x for x in ll if 0<=x<=maxnum]


From irstas at gmail.com  Thu Mar 29 16:37:30 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 29 Mar 2007 13:37:30 -0700
Subject: How can I get the content of a web site using http library
In-Reply-To: <1175197795.023801.158240@d57g2000hsg.googlegroups.com>
References: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
	<1175196846.439678.109250@y66g2000hsf.googlegroups.com>
	<1175197795.023801.158240@d57g2000hsg.googlegroups.com>
Message-ID: <1175200650.420019.44000@o5g2000hsb.googlegroups.com>

On Mar 29, 10:49 pm, "silverburgh.me... at gmail.com"
<silverburgh.me... at gmail.com> wrote:
> Thanks. Can you please tell me how can I do a Post form submission
> using the urlLib2 library? I look at your link, but i cant find an
> example there.
>
> Thank you.

http://www.python.org/doc/current/lib/module-urllib2.html

Look into urlopen's data parameter.



From inq1ltd at verizon.net  Wed Mar  7 09:58:55 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 07 Mar 2007 09:58:55 -0500
Subject: askstring Window to the top under Windows
In-Reply-To: <1173261916.618914.69130@8g2000cwh.googlegroups.com>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<mailman.4732.1173231681.32031.python-list@python.org>
	<1173261916.618914.69130@8g2000cwh.googlegroups.com>
Message-ID: <200703070958.55280.inq1ltd@verizon.net>

On Wednesday 07 March 2007 05:05, iwl wrote:
> On 7 Mrz., 02:49, jim-on-linux 
<inq1... at verizon.net> wrote:
> > On Tuesday 06 March 2007 08:13, iwl wrote:
> > > Hi,
> > >
> > > I tryed askstring to input some text in my
> > > script, but some ugly empty Window appears
> > > with the Input-Window behind and all
> > > together behind my Console showing my
> > > script. So all have to brought to the top
> > > first by the user - very unconfortable
> >
> > By default
> > tk will open a root window.
>
> Is this default changeable befor askstring?

Here is an example of a simple button that will 
open a tkSimpleDialog box
======

from Tkinter import *
import tkSimpleDialog
from tkSimpleDialog import askfloat

root = Tk()  ## this is the default window
vlab = Button( root, text= 'Click here to Open 
            Dialog',
            width = 20, height = 2,
            bg = 'yellow',
       command =(lambda:   askfloat( 'Entery',
       'Enter credit card number') ) )
vlab.grid()
mainloop()

jim-on-linux
http://www.inqvista.com


From steve at holdenweb.com  Wed Mar 21 13:43:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 13:43:30 -0400
Subject: Delete a function
In-Reply-To: <1174496687.142300.205350@n76g2000hsh.googlegroups.com>
References: <1174494159.024910.151540@l75g2000hse.googlegroups.com>	<mailman.5405.1174495228.32031.python-list@python.org>
	<1174496687.142300.205350@n76g2000hsh.googlegroups.com>
Message-ID: <etrqul$osv$1@sea.gmane.org>

gtb wrote:
> On Mar 21, 11:37 am, Steve Holden <s... at holdenweb.com> wrote:
>> gtb wrote:
>>> After a function has been imported to a shell how may it be deleted so
>>> that after editing it can reloaded anew?
>> Use the built-in reload() function to reload the module that defines the
>> function.
>>
>> regards
>>   Steve
>> --
>> Steve Holden       +44 150 684 7255  +1 800 494 3119
>> Holden Web LLC/Ltd          http://www.holdenweb.com
>> Skype: holdenweb    http://del.icio.us/steve.holden
>> Recent Ramblings      http://holdenweb.blogspot.com
> 
> Thanks, tried that now and get nameError: with the following.
> 
> import sys
> sys.path.append("c:\maxq\testScripts")
> 
> from CompactTest import CompactTest
> from compactLogin import dvlogin
> 
> reload(compactLogin)
> 
The local compactLogin isn't being bound to the module because of the 
import form you are using.

Here's meta1.py:

$ more meta1.py
class MyMeta(type):
     ...

class MyClass:
     __metaclass__ = MyMeta

Now see what happens when I import the MyMeta class from it:

  >>> from meta1 import MyMeta
  >>> import sys
  >>> sys.modules['meta1']
<module 'meta1' from 'meta1.py'>
  >>> reload(meta1)
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
NameError: name 'meta1' is not defined
  >>> reload(sys.modules['meta1'])
<module 'meta1' from 'meta1.pyc'>
  >>>

Note, however, that this reload() call does NOT re-bind the local 
MyMeta, which still references the class defines in the original version 
of the module. You'd be better off using

import compactLogin

and then setting

dvlogin = compactLogin.dvlogin

after the original import and each reload. Eventually you'll develop a 
feel for how namespaces work in Python and you'll be able to take liberties.

Finally, note that there isn't much point doing the reload() unless the 
content of the modue has actually changed!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From malaclypse2 at gmail.com  Fri Mar 16 17:48:27 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Fri, 16 Mar 2007 17:48:27 -0400
Subject: How to get the previous line in a file?
In-Reply-To: <882682.16208.qm@web58912.mail.re1.yahoo.com>
References: <882682.16208.qm@web58912.mail.re1.yahoo.com>
Message-ID: <16651e80703161448s6c08ce7cm8f7e11c4becd0441@mail.gmail.com>

On 3/16/07, Qilong Ren <qilong_ren at yahoo.com> wrote:
> I have a question. I need to do some text processing. I need to read from a
> file line by line. If some line is met with some condition, the previous
> line needs some modification. How to get the info of the previous line?

I would do something like the following:

inFile = open("LICENSE.txt")

prev_line = None
for line in inFile:
    if "foo" in line:
        print prev_line
        print line
    prev_line = line
inFile.close()

-- 
Jerry


From vatamane at gmail.com  Thu Mar  8 02:34:20 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 7 Mar 2007 23:34:20 -0800
Subject: Is numeric keys of Python's dictionary automatically sorted?
In-Reply-To: <esn8ir$c8p4$1@netnews.upenn.edu>
References: <esn6nu$c8nt$1@netnews.upenn.edu>
	<1173300100.810023.223130@t69g2000cwt.googlegroups.com>
	<esn8ir$c8p4$1@netnews.upenn.edu>
Message-ID: <1173339260.576508.157010@c51g2000cwc.googlegroups.com>

On Mar 7, 3:49 pm, "John" <rds1... at sh163.net> wrote:
> Then is there anyway to sort the numeric keys and avoid future implemetation
> confusion?
>
> "Ant" <ant... at gmail.com> wrote in message
>
> news:1173300100.810023.223130 at t69g2000cwt.googlegroups.com...
>
> > On Mar 7, 8:18 pm, "John" <rds1... at sh163.net> wrote:
> > ...
> >> However, I am not sure whether it is always like this. Can anybody
> >> confirm
> >> my finding?
>
> >>From the standard library docs:
>
> > "Keys and values are listed in an arbitrary order which is non-random,
> > varies across Python implementations, and depends on the dictionary's
> > history of insertions and deletions."
>
> > i.e. the behaviour you have discovered is an implementation detail,
> > and could change in future versions.

I would consider that a bad choice. In the dictionary the keys are a
set i.e. you might as well get a set() when you do d.keys() but the
set() came later so you just get a list. The problem with a list is
that somehow people want to make sense of it's order, just like in
this case. So if instead of asking, he could have just written the
application based on the fact that the keys will always be sorted in
some way. But then one day his application maybe run a different
platform and all of the sudden the keys are not sorted as before and
then disaster strikes.

I hope that dictionary.keys() would return a set to emphasize that
keys are unordered.

You suggested to just set a sort order and keep it consistent, but the
problem is that then you _have to_ maintain the sort order in addition
to the regular dictionary implementation (now it might just be a
byproduct), that is extra work that will have to be done on every
single insertion or deletion just for that rare use case where someone
will want the keys to be sorted.



From rdm at rcblue.com  Tue Mar 13 08:57:43 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 13 Mar 2007 05:57:43 -0700
Subject: number generator
Message-ID: <20070313125744.259961E4003@bag.python.org>

At 02:52 AM 3/13/2007, Duncan Booth wrote:
>Dick Moores <rdm at rcblue.com> wrote:
>
> > But let's say there is one more constraint--that for each n of the N
> > positive integers, there must be an equal chance for n to be any of
> > the integers between 1 and M-N+1, inclusive. Thus for M == 50 and N
> >== 5, the generated list of 5 should be as likely to be [1,46,1,1,1]
> > as [10,10,10,10,10] or [14, 2, 7, 1, 26].
>
>I don't think what you wrote actually works. Any combination including a 46
>must also have four 1s, so the digit 1 has to be at least 4 times as likely
>to appear as the digit 46, and probably a lot more likely than that.

Yes, I see you're right. Thanks.

>On the other hand, making sure that each combination occurs equally often
>(as your example might imply) is doable but still leaves the question
>whether the order of the numbers matters: are [1,46,1,1,1] and [1,1,46,1,1]
>the same or different combinations?

If the added constraint is instead that the probability of generating 
a given list of length N be the same as that of generating any other 
list of length N, then I believe my function does the job. Of course, 
[1,46,1,1,1] and [1,1,46,1,1], as Python lists, are distinct. I ran 
this test for M == 8 and N == 4:
======================================================
def sumRndInt(M, N):
     import random
     while True:
         lst = []
         for x in range(N):
             n = random.randint(1,M-N+1)
             lst.append(n)
         if sum(lst) == M:
             return lst

A = []
B = []
for x in range(100000):
     lst = sumRndInt(8,4)
     if lst not in A:
         A.append(lst)
         B.append(1)
     else:
         i = A.index(lst)
         B[i] += 1

A.sort()
print A
print B
print len(A), len(B)
===========================================================
a typical run produced:
[[1, 1, 1, 5], [1, 1, 2, 4], [1, 1, 3, 3], [1, 1, 4, 2], [1, 1, 5, 
1], [1, 2, 1, 4], [1, 2, 2, 3], [1, 2, 3, 2], [1, 2, 4, 1], [1, 3, 1, 
3], [1, 3, 2, 2], [1, 3, 3, 1], [1, 4, 1, 2], [1, 4, 2, 1], [1, 5, 1, 
1], [2, 1, 1, 4], [2, 1, 2, 3], [2, 1, 3, 2], [2, 1, 4, 1], [2, 2, 1, 
3], [2, 2, 2, 2], [2, 2, 3, 1], [2, 3, 1, 2], [2, 3, 2, 1], [2, 4, 1, 
1], [3, 1, 1, 3], [3, 1, 2, 2], [3, 1, 3, 1], [3, 2, 1, 2], [3, 2, 2, 
1], [3, 3, 1, 1], [4, 1, 1, 2], [4, 1, 2, 1], [4, 2, 1, 1], [5, 1, 1, 1]]

[2929, 2847, 2806, 2873, 2887, 2856, 2854, 2825, 2847, 2926, 2927, 
2816, 2816, 2861, 2919, 2820, 2890, 2848, 2898, 2883, 2820, 2820, 
2829, 2883, 2873, 2874, 2891, 2884, 2837, 2853, 2759, 2761, 2766, 2947, 2875]

35 35

Dick Moores






From paul.rudin at ntlworld.com  Sun Mar 25 04:30:52 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Sun, 25 Mar 2007 09:30:52 +0100
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.22.59.05@mailinator.com>
	<pan.2007.03.25.03.40.32.158357@REMOVE.THIS.cybersource.com.au>
	<pan.2007.03.25.07.10.22@mailinator.com>
Message-ID: <87bqihybb7.fsf@rudin.co.uk>

Mark <mark at mailinator.com> writes:



> Of course I realise the modern mantra that "premature optimisation is
> the root of all evil" but I don't subscribe to it. Programmers have been
> "encouraged" to not give a toss about efficiency and the outcome is all
> too apparent - most software today looks and runs like a pile of crap.

Many people write code that is very obviously "wrong". But that
doesn't mean that labouring for hours over minor speed-ups is actually
worthwile for people who don't, as a rule, do gratuitously "wrong"
stuff in the first place.


There is, of course, a trade-off between programmer time and run
time. It's hard to know where the correct balance lies for each
particular program.


From yinglcs at gmail.com  Tue Mar 27 14:09:18 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 27 Mar 2007 11:09:18 -0700
Subject: How can I catch all exception in python?
Message-ID: <1175018958.602131.145190@y80g2000hsf.googlegroups.com>

I read the document here about exception handling in python:

http://www.diveintopython.org/file_handling/index.html

Can you please tell me how can I catch all exception in python?
like this in Java:
try {
 ....
} catch (Throwable t) {
 ...
}



From duncan.booth at invalid.invalid  Thu Mar 15 11:54:13 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Mar 2007 15:54:13 GMT
Subject: Multiline code - trailing slash usage
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
	<mailman.5132.1173971802.32031.python-list@python.org>
Message-ID: <Xns98F4A17253276duncanbooth@127.0.0.1>

Steve Holden <steve at holdenweb.com> wrote:

> x = "hello world, this is my multiline " \
>       "string!!!!"
> 
> and this would have saved you a run-time string concatenation :)

or use parentheses for an alternative which doesn't need the backslash:

x = ("hello world, this is my multiline " 
      "string!!!!")




From francois.petitjean at bureauveritas.com  Thu Mar  8 14:41:55 2007
From: francois.petitjean at bureauveritas.com (francois.petitjean at bureauveritas.com)
Date: Thu, 8 Mar 2007 20:41:55 +0100
Subject: Tell me the truth
Message-ID: <OF61126618.105E13AC-ONC1257298.006A2139-C1257298.006C3558@bureauveritas.com>

Duncan Booth wrote :
> francois.petitjean at bureauveritas.com wrote:

>> After much head scrating and experimenting with dis.dis() I have found
>> that chaining comparisons (with is or ==)  a == b == c in Python is
>> never a good idea. It is interpreted as
>>  ( a == b ) and ( b == c)
>> Such a magic is fine  when we write:
>>  if  0.0 <= x < 1.0:
>> but it renders the outcome of  if a == b == c: somewhat confusing.

> I don't understand why it is confusing. What other meaning would you
> expect?
Consider:
>>> Python = cool = True
>>> Python is cool
True
>>> Python is cool is True
True
# heh  it seems possible to tackle is True to a boolean expression (not
always)
>>> it = False
>>> Python is cool is not it
True
# I knew that. slef evident...
>>> Python = cool = False
>>> Python is cool is not it
False
# Waht? desillution...
# Ough! You must reread the reference documentation on chaining the
comparison operators and understand the semantics (the two comparisons are
'anded' and 'and' shortcircuits in Python).
>>> Python is cool
True
# Yeah!

Regards


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From eurleif at ecritters.biz  Wed Mar 14 16:21:21 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 14 Mar 2007 16:21:21 -0400
Subject: Converting a list to a dictionary
In-Reply-To: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
Message-ID: <45f8593f$0$8966$4d3efbfe@news.sover.net>

Samuel wrote:
> This does not work:
> 
> res_dict = dict([r.get_id(), r for r in res_list])

This does:

res_dict = dict([(r.get_id(), r) for r in res_list])


From ebgssth at gmail.com  Sat Mar  3 04:46:47 2007
From: ebgssth at gmail.com (js )
Date: Sat, 3 Mar 2007 18:46:47 +0900
Subject: print a ... z, A ... Z, "\n"' in Python
In-Reply-To: <d50f6c8a0703030020t44be5c50p8d2dbfe26f55846e@mail.gmail.com>
References: <a23effaf0703030007w3621b75du748c2cb1d9b0340b@mail.gmail.com>
	<d50f6c8a0703030020t44be5c50p8d2dbfe26f55846e@mail.gmail.com>
Message-ID: <a23effaf0703030146y5d3c934dob23b394cc6ba9ccb@mail.gmail.com>

I forgot to cc pythonlist...
#####################

Thanks for you quick reply.

I didn't know any string constants.

>From Python Library reference, 4.1.1 String constants:

letters
   The concatenation of the strings lowercase and uppercase described below.
  The specific value is locale-dependent, and will be updated when
locale.setlocale() is called.

Great...


From paul.rudin at ntlworld.com  Fri Mar 23 15:08:53 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Fri, 23 Mar 2007 19:08:53 +0000
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<87ejnfzsoi.fsf@rudin.co.uk>
Message-ID: <87aby3zsje.fsf@rudin.co.uk>

Paul Rudin <paul.rudin at ntlworld.com> writes:

> Paulo da Silva <psdasilvaX at esotericaX.ptX> writes:
>
>> Hi!
>>
>> I was told in this NG that string is obsolet. I should use
>> str methods.
>>
>> So, how do I join a list of strings delimited by a given
>> char, let's say ','?
>>
>> Old way:
>>
>> l=['a','b','c']
>> jl=string.join(l,',')
>>
>> New way?
>
> Dunno if it's the "new way", but you can do: ''.join(l)

Err, sorry - missed the comma out - it should be: ','.join(l)


From "enquiring mind" at braindead.com  Sat Mar 31 22:37:16 2007
From: "enquiring mind" at braindead.com (enquiring mind)
Date: Sun, 01 Apr 2007 02:37:16 GMT
Subject: Pygame Q (linux) beginner
Message-ID: <460F28F2.D91DB67A@braindead.com>

Running 2.4.1 Python (learning)
Running SUSE Linux 10

Am learning from a new books that mostly deals with windows python and
Pygames called "Game Programming" by Randy Harris (2007)  His books
references Python 2.4.2 and Pygame 1.7.1 with these comments:  

"If you are using a Linux machine, you probably won't have the simple
installer that came with the windows version.  Follow the instructions
at http://pygame.org/install.  You may have to run a couple of scripts
to make everything work, but just follow the directions and you will be
fine."  

Could anybody suggest or make a helpful comment in view of what
information I have supplied.  At Chapter 5 is where the Pygame module is
introduced so I have a little time before I have to figure out what I
have to download and install.  

Thanks very much in advance for any direction. 

Terry


From lbates at websafe.com  Tue Mar 13 14:56:35 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 13 Mar 2007 13:56:35 -0500
Subject: Tools for GUI/graphics
In-Reply-To: <1173810046.6562@jubilee.claranet.pt>
References: <1173810046.6562@jubilee.claranet.pt>
Message-ID: <C46dnbe3w4N9bmvYnZ2dnUVZ_u7inZ2d@comcast.com>

Paulo da Silva wrote:
> I need to make some data representation.
> Basically a major window for a 2D chart,
> a scrollable window with some few small 2D
> graphics. The rest is a normal form with
> buttons, labels and entries.
> 
> I thought of doing that using Tkinter+pmw+blt.
> But now I'm considering use a web solution.
> Is there anything that make this stuff easy?
> I'm not searching for professional look. This
> is for my personal use and the important is
> the data processed and visualized I could get.
> I gave a look at cherrypy but from a 1st sight
> I couldn't see if it allows for easy graphic
> charts - may be with svg ...
> 
> Thanks for any suggestions.

You can use ReportLab Graphics to generate the
graphs as .JPG files and display them in a
browser window with simple HTML.

-Larry Bates


From tim at tdw.net  Fri Mar 30 12:42:53 2007
From: tim at tdw.net (Tim Williams)
Date: Fri, 30 Mar 2007 17:42:53 +0100
Subject: File deletion after 72 hours of creation
In-Reply-To: <R69299281.844.6022.1@mxextra>
References: <1175183124.401829.41330@n76g2000hsh.googlegroups.com>
	<mailman.5760.1175184145.32031.python-list@python.org>
	<R69299281.844.6022.1@mxextra>
Message-ID: <9afea2ac0703300942y2cad7984gf963b9beb3e2ef3e@mail.gmail.com>

On 29 Mar 2007 13:40:58 -0700, ALEXURC at gmail.com <ALEXURC at gmail.com> wrote:
> On Mar 29, 12:02 pm, s... at pobox.com wrote:
> >     Alex> I'm looking for a simple method to delete a folder after 72
> >     Alex> "Business hours" (saturday/sunday doesnt count) since its
> >     Alex> creation. Note that This is on a linux system and I realize that
> >     Alex> it will be the last modified time. These files wont be modified
> >     Alex> since their creation.
> >
> >     Alex> Im very confused on how to work with the number easily.
> >
> > Take a look at the dateutil module.  Its relativedelta object has some
> > weekday sense:
> >
> >    http://labix.org/python-dateutil
> >
> > Skip
>
> Hey, thanks for the reply, I was able to accomplish it (somewhat ugly)
> using the datetime module alone. Here is my code.
> the part with the timestamp.file is just a plaintext file containg
> "#year#month#day" that is created when my client side program copies
> files into my directory.
>
> Just posting the code so if anyone else is wondering how to do this
> ever maybe they can find some of this useful:
> ---
>
> #!/usr/bin/env python
>
> import datetime
> import os
> today = datetime.date.today().toordinal()
> serverFiles = os.listdir("/home/webserver/")
> theDirList=[]
> for xfile in serverFiles:
>         if os.path.isdir("/home/webserver/" + xfile) == True:
>                 theDirList.append(xfile)
>
>
> for xdir in theDirList:
>         foo=open("/home/webserver/"+ xdir + "/timestamp.file",'r')
>         parseMe = foo.readlines()
>         fileDate=parseMe[0].split("#")
>         fileYear = fileDate[1]
>         fileMonth = fileDate[2]
>         fileDay = fileDate[3]
>
>         age_of_file = today -
> datetime.date(int(fileYear),int(fileMonth),int(fileDay)).toordinal()
>         true_age = age_of_file
>         for i in range(age_of_file):
>                 d=
> datetime.date(int(fileYear),int(fileMonth),int(fileDay)+i)
>                 ourDay = d.weekday()
>                 if ourDay == 5 or ourDay == 6:
>                         true_age = true_age - 1
>
>  print xdir + " : " + str(true_age) + " days old"
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>

You may have "over thought" the problem :)

(Not tested)
----------------------------------------------------------
import os, time

pth = '/home/webserver/'
a_day = 60*60*24
today = time.asctime().split()[0]
cutOffDate = time.time() - (3 * a_day)
if today in ['Mon','Tue','Wed']:
    cutOffDate = cutOffDate - (2 * a_day)

for f in os.listdir( pth ):
 	fname = os.path.join(pth ,f)
 	if os.path.isfile( fname ) and os.path.getmtime(fname) < cutOffDate:
 			print fname # os.remove(fname)

------------------------------------------------------------------


From crowell at mit.edu  Wed Mar  7 17:55:08 2007
From: crowell at mit.edu (Rob)
Date: 7 Mar 2007 14:55:08 -0800
Subject: Calling a function with unknown arguments?
Message-ID: <1173308108.239943.174560@j27g2000cwj.googlegroups.com>

I can get a list of a function's arguments.
>>> def bob(a, b):
...     return a+b
...
>>> bob.func_code.co_varnames
('a', 'b')

Let's say that I also have a dictionary of possible arguments for this
function.
>>> possible = {'a':10, 'b':5, 'c':-3}

How do I proceed to call bob(a=10, b=5) with this information?

Thanks!



From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:53:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:53:24 -0300
Subject: "urlopen" not thread safe
References: <iilKh.4929$tv6.1894@newssvr19.news.prodigy.net>
Message-ID: <op.tpbghdshx6zn5v@gabriel2>

En Thu, 15 Mar 2007 21:12:46 -0300, John Nagle <nagle at animats.com>  
escribi?:

>     I was looking at the code for "urllib", and there's
> some undocumented "FTP cacheing" code in there that's not thread safe.
> The documentation for "urllib"
>
>     Is there any good reason to keep that code in "urllib"?
> Unless something critical uses that undocumented feature,
> that code probably ought to come out.  Comments?

Maybe the default should be None, like tempcache; anyone interested could  
assign to the ftpcache instance attribute.

-- 
Gabriel Genellina



From adriancico at gmail.com  Thu Mar  1 08:24:02 2007
From: adriancico at gmail.com (adriancico at gmail.com)
Date: 1 Mar 2007 05:24:02 -0800
Subject: Questions about app design - OOP with python classes
Message-ID: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>

Hi

    I am working on a python app, an outliner(a window with a TreeCtrl
on the
left to select a document, and a RichTextBox at the right to edit the
current
doc).

    I am familiarized with OOP concepts and terms but I lack practical
experience
, so any comment/tip/pointer to docs will be welcome.

    So far, I have created a separated class for each important
element of my app
        - the main Frame (cFrmMain)
        - the TreeCtrl
        - the TextCtrl at the right
        - a cDocument class that contains the entire file with all
docs
          and manages creation/deletion/saving to disk, etc
        - classes for the toolbar, the menubar, etc

    With this design, pretty much everything is encapsulated in it
respective
class. However, that means that the main program logic is in the Frame
class.
>From there, it instantiates the other classes and is responsable of
the
communication between them.

    For example, the user deletes a node on the Tree, this raises an
event
on cFrmMain (the main Frame class). In the event handler, cFrmMain
notifies
cDocument that a node (and the associated text) has been deleted so
the master
file is modified accordingly.

    The problem is, I have been implementing some funcionalities to
test this
design, I have less than a dozen operations implemented and cFrmMain
has grown
more than acceptable, starting to get confusing.

    This design feels "not quite right" to me, I've been considering
allowing
the different classes to know of the existence of each other and pass
messages
between them. I would lose encapsulation (I think), and I don't know
if that would be
(very) bad... and I'm not sure if with this design I will gain or lose
clarity on the code.

    My questions ( at last :-) ) are:

    ?Should I stick to my first design idea, eventually moving code
from the
main Frame to modules to gain clarity?

    ?Is the second idea I present "correct" (I know it'll work, what I
want to
know is the clearest way of organize my code)?

    ?Am I doing this wrong from the start and have to use another
design?

Thanks for reading this long post. Any comment, hint or pointer to
docs will
be greatly appreciated.

Regards
Adri?n Garrido



From tjreedy at udel.edu  Tue Mar  6 18:25:15 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 6 Mar 2007 18:25:15 -0500
Subject: is it possible to give an instance a value?
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
Message-ID: <eskt8s$a93$1@sea.gmane.org>


"manstey" <manstey at csu.edu.au> wrote in message 
news:1173221145.793008.298940 at v33g2000cwv.googlegroups.com...
| Hi,
|
| My question probably reflects my misunderstanding of python objects,
| but I would still like to know the answer.
|
| The question is, is it possible for an instnace to have a value (say a
| string, or integer) that can interact with other datatypes and be
| passed as an argument?

In the way you are asking, no.

| Is there a way to make a have the value a.val when it is used as
| above, or as an argument (eg function(a, 10, 'sdf') etc)?
|
| The only fudge I discovered for simple addition was to add to the
| class
|
|   def __add__(self, obj):
|       return a.val + obj
|
| but this doesn't solve the problem in general. I have tried
| subclassing the string type, but as it is immutable, this is not
| flexible the way a.val is (i.e. it can't e reassigned and remain a
| subclass).

Special methods are the Python way,  not a fudge.  Consider

>>> dir(1)
['__abs__', '__add__', '__and__', '__class__', '__cmp__', '__coerce__', 
'__delattr__', '__div__', '__divmod__', '__doc__', '__float__', 
'__floordiv__', '__getattribute__', '__getnewargs__', '__hash__', 
'__hex__', '__init__', '__int__', '__invert__', '__long__', '__lshift__', 
'__mod__', '__mul__', '__neg__', '__new__', '__nonzero__', '__oct__', 
'__or__', '__pos__', '__pow__', '__radd__', '__rand__', '__rdiv__', 
'__rdivmod__', '__reduce__', '__reduce_ex__', '__repr__', '__rfloordiv__', 
'__rlshift__', '__rmod__', '__rmul__', '__ror__', '__rpow__', 
'__rrshift__', '__rshift__', '__rsub__', '__rtruediv__', '__rxor__', 
'__setattr__', '__str__', '__sub__', '__truediv__', '__xor__']

All these int methods do the C equivalent of return int(self.val + 
other.val), etc.  Similarly, the reason an int object with value 123 prints 
as 123 instead of <int object at 0xXXXXXX> is because the C coded __str__ 
extracts the value field of the int structure and converts it to ascii.

Terry Jan Reedy





From laurent.pointal at limsi.fr  Mon Mar 26 04:33:58 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Mon, 26 Mar 2007 10:33:58 +0200
Subject: Create new processes over telnet in XP
In-Reply-To: <mailman.5531.1174684678.32031.python-list@python.org>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>	<46043ad8$0$27402$ba4acef3@news.orange.fr>
	<mailman.5531.1174684678.32031.python-list@python.org>
Message-ID: <eu80h6$fno$1@news2.u-psud.fr>

Shane Geiger a ?crit :
> This reminds me of something I once wanted to do:  How can I install
> Python in a totally non-gui way on Windows (without the use of VNC)?  I
> think I was telnetted into a computer (or something like that) and I was
> unable to run the usual Python installer because it uses a GUI.

Take a look at PortablePython, this may be the easy solution...

	http://www.portablepython.com/


A+

Laurent.



From psdasilvaX at esotericaX.ptX  Sat Mar 24 10:32:07 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 24 Mar 2007 14:32:07 +0000
Subject: Join strings - very simple Q.
In-Reply-To: <1174680929.492601.140270@o5g2000hsb.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
Message-ID: <1174746810.280731@jubilee.claranet.pt>

John Machin escreveu:
..

> Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> | >>> help("".join)
> Help on built-in function join:
> 
> join(...)
>     S.join(sequence) -> string
> 
>     Return a string which is the concatenation of the strings in the
>     sequence.  The separator between elements is S.
> 
> | >>>
> 
> OK, I'll bite: This was "new" in late 2000 when Python 2.0 was
> released. Where have you been in the last ~6.5 years?

In a response to one of my posts I was told 'string' is
obsolet. 'string' was enough for me, but if it is obsolet
then there should be a *new* way, isn't it? The *new*
way I was told to use is "str methods".
I tried that *new* way to do *old* 'string' job. Voila
the reason of my so pertinent question.

I am deeply sorry to have disturbed you in your python's heaven.

Next time I'll read all books available, all texts including
the python formal description before
posting, or perhaps it would be better and more simple if you
just ignore my posts.

Bye.
Paulo



From maxsteel at gmail.com  Fri Mar 30 11:49:08 2007
From: maxsteel at gmail.com (Max Steel)
Date: Fri, 30 Mar 2007 10:49:08 -0500
Subject: New to Python - Easy way to open a text file
Message-ID: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>

Hey gang, I'm new to python coding.  I'm trying to find the simplest way to 
open a text file (on the same server) and display it's content.

The text file is plain text (no markup language of any kind).

The filename gets found and placed into a variable named [plainfiles.href]

I'm using python to find the text files, and a .ezt template to display the 
list of the files.  But I can't figure out how to read the contents of the 
file, and display it within the same template.

Any help is appreciated.

Thanks in advance,
.\\axSteel 




From markbpan at mailinator.com  Tue Mar 20 20:37:15 2007
From: markbpan at mailinator.com (Mark)
Date: 21 Mar 2007 00:37:15 GMT
Subject: Idiom for running compiled python scripts?
Message-ID: <pan.2007.03.21.00.37.14@mailinator.com>

Hi, I'm new to python and looking for a better idiom to use for the
manner I have been organising my python scripts. I've googled all over
the place about this but found absolutely nothing.

I'm a linux/unix command line guy quite experienced in shell scripts
etc. I have a heap of command line utility scripts which I run directly.
What is the best way to create python command line scripts but exploit
the (loadonly) speed-up benefit of python compiled code?

E.g. say I have a python script "myprog.py". I could just execute that
directly each time but that means it is "compiled" each time I run it
which is not efficient and adds to startup time. I have been creating a
complimentary script "myprog" stub which just does:

#!/usr/bin/env python
from myprog import main
if __name__ == "__main__":
    main()

Of course this compiles myprog.py into myprog.pyc on first run as I am
wanting.

I have one of these stubs for all my python scripts I've created so far.
Is there not a better way? Do I have to create a separate stub each
time? I find it a bit messy to require a pair of scripts for each
utility and it also contributes some inefficiency. Given the above stub
is so boilerplate, why does python not provide a general stub/utility
mechanism for this?


From http  Thu Mar  8 05:46:40 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 02:46:40 -0800
Subject: Is numeric keys of Python's dictionary automatically sorted?
References: <esn6nu$c8nt$1@netnews.upenn.edu>
Message-ID: <7x8xe8dncf.fsf@ruckus.brouhaha.com>

"John" <rds1226 at sh163.net> writes:
> I am coding a radix sort in python and I think that Python's dictionary may 
> be a choice for bucket.

Why are you coding a radix sort? 

> The only problem is that dictionary is a mapping without order. But
> I just found that if the keys are numeric, the keys themselves are
> ordered in the dictionary.

Just an accident, dicts are implemented using hashing, and small
integers hash to themselves.


From eurleif at ecritters.biz  Thu Mar 29 07:12:43 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 29 Mar 2007 07:12:43 -0400
Subject: YouTube showing repr() of a tuple
Message-ID: <460b9f48$0$30100$4d3efbfe@news.sover.net>

Thought this might amuse some of you:

<http://youtube.com/results?search_query=korect+my+speling>

I'd heard that YouTube uses Python, but it's fun to see proof of that, 
even if it comes in the form of a minor bug.


From mail at microcorp.co.za  Fri Mar 30 02:22:18 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 30 Mar 2007 08:22:18 +0200
Subject: socket read timeout
References: <20070329115222.18920.994320595.divmod.quotient.6408@ohm>
Message-ID: <006001c772a2$8a8ccc20$03000080@hendrik>

"Jean-Paul Calderone" <ex...n at d...od.com> wrote:

> On Thu, 29 Mar 2007 07:29:35 +0200, Hendrik van Rooyen
<m....l at m.....orp.co.za> wrote:

> >Are sockets full duplex?
>
> Uh, yes.

The reason I asked is that I have noticed that other file like objects
(on Suse 10 Linux and Python 2.4 out of the box) aren't  really:

If you start a blocking read in one thread on a serial port, and you
then issue a write in another thread, the characters are not transmitted
until the read completes.  It is as if the "driver" gets busy in the read
and queues the write - I think a lot of the "My output does not come
out till I close the programme" type of questions on this group is
caused by this.   And calling flush makes no difference under these
circumstances.- you have to unblock and use try - except on the read
as well.

So I was wondering if sockets are the same, as I haven't messed
with them much- just set up simple client server stuff in a
"Monkey see, Monkey do" way.

> >I know Ethernet isn't.
>
> Not that this is relevant, but unless you're using a hub, ethernet _is_
> full duplex.

: - ) Yes the UTP allows point to point full duplex, as there are separate
receive and transmit pairs.

But the protocol is not called Carrier Sense Multiple Access with
Collision Detection for nothing. - there can be no collisions in a true
full duplex channel. And its kind of difficult to swap rx and tx pairs
if there are more than two endpoints - you need a central point, and then
the "slaves" can't hear each other unless the central point passes the
messages on, or does some switching functions.

Reason I mentioned Ethernet is that in most cases (between machines)
its the underlying technology and if sockets were therefore not actually
full duplex it would not be surprising.

Is it actually possible to do what I have described for the serial port
case on a socket and have the message transmitted before one is
received?  Using a blocking receive?

- Hendrik



From claird at lairds.us  Wed Mar 21 21:41:08 2007
From: claird at lairds.us (Cameron Laird)
Date: Thu, 22 Mar 2007 01:41:08 +0000
Subject: regex reading html
References: <mailman.5399.1174490841.32031.python-list@python.org>
Message-ID: <ke39d4-b14.ln1@lairds.us>

In article <mailman.5399.1174490841.32031.python-list at python.org>,
ben miller <wheelscribe at gmail.com> wrote:
>Hello,
>I've a program I'm working on where we scrape some of our web pages
>using Mechanize libraries and then parse what we've scraped using
>different regex functions. However, I've noticed that no matter what I
>do with the scraped content, regex functions can't find what they're
>trying to match. If I take the same text and manually feed it to the
>same regex functions, everything works as expected? Is there a
>specific text transformation I need to apply before feeding the regex
>functions?
			.
			.
			.
No.

There's an error, and it's in your understanding.  I don't 
mean to be harsh; from the information you've supplied, all
we can tell is that it's very likely you've mis-specified
one of your "regex functions".
 
To make more progress on this problem, it's VERY likely 
going to be best that you supply a specific calculation 
that gives you a specific result different from what you
expect.  The details matter.

<URL: http://www.catb.org/~esr/faqs/smart-questions.html >


From mark at mailinator.com  Sat Mar 24 19:46:15 2007
From: mark at mailinator.com (Mark)
Date: 24 Mar 2007 23:46:15 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
Message-ID: <pan.2007.03.24.23.46.15@mailinator.com>

On Sat, 24 Mar 2007 07:21:21 -0700, irstas wrote:
> A simple implementation that "works":

Not quite irstas BTW ..

> import imp, sys, os
> c = sys.argv[1]
> if not os.path.exists(c + 'c') or os.stat(c).st_mtime > os.stat(c +
> 'c').st_mtime:
>     import compiler
>     compiler.compileFile(c)
> del sys.argv[0]
> imp.load_compiled('__main__', c + 'c')

The above doesn't actually work for my test script. I have an atexit
call in the script which is deleting some temp files and I get the
following traceback on termination when run with the above:

Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/home/mark/bin/myscript.py", line 523, in delete
    if files.tempdir:
AttributeError: 'NoneType' object has no attribute 'tempdir'
Error in sys.exitfunc:
Traceback (most recent call last):
  File "/usr/lib/python2.4/atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "/home/mark/bin/myscript.py", line 523, in delete
    if files.tempdir:
AttributeError: 'NoneType' object has no attribute 'tempdir'

The appropriate source code is:

At the start of main() ..

    # Ensure all temp files deleted on exit
    import atexit
    atexit.register(files.delete)

and then from my class "files":

    @staticmethod
    def delete():
	'''Called to delete all temp files'''

	if files.tempdir:
	    shutil.rmtree(files.tempdir)

Something about the environment is not quite the same. Any ideas?


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 16:34:53 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 22:34:53 +0100
Subject: Webserver balance load
In-Reply-To: <mailman.4691.1173124499.32031.python-list@python.org>
References: <mailman.4691.1173124499.32031.python-list@python.org>
Message-ID: <45ec8502$0$2129$426a34cc@news.free.fr>

Jean-Paul Calderone a ?crit :
> On 5 Mar 2007 11:47:15 -0800, Johny <python at hope.cz> wrote:
> 
>> Can anyone suggest a way how to balance load on Apache server where I
>> have Python scripts running?
>> For example I have 3 webservers( Apache servers) and I would like to
>> sent user's request to one of the three server depending on a load on
>> the server.
>> Thank you .
>> L.
>>
> 
> http://pythondirector.sourceforge.net/ might be interesting.

See also pound:
http://www.apsis.ch/pound/



From barnaclejive at gmail.com  Sat Mar 24 19:52:49 2007
From: barnaclejive at gmail.com (mkppk)
Date: 24 Mar 2007 16:52:49 -0700
Subject: Anyone know of a MICR parser algorithm written in Python?
In-Reply-To: <1174776923.618895.232630@y80g2000hsf.googlegroups.com>
References: <1174763132.786644.161500@y66g2000hsf.googlegroups.com>
	<1174776923.618895.232630@y80g2000hsf.googlegroups.com>
Message-ID: <1174780369.721874.250280@e65g2000hsc.googlegroups.com>

On Mar 24, 4:55 pm, "Paul McGuire" <p... at austin.rr.com> wrote:
> On Mar 24, 2:05 pm, "mkppk" <barnaclej... at gmail.com> wrote:
>
>
>
> > MICR = The line of digits printed using magnetic ink at the bottom of
> > a check.
>
> > Does anyone know of a Python function that has been written to parse a
> > line of MICR data?
> > Or, some financial package that may contain such a thing?
> > Or, in general, where I should be looking when looking for a piece of
> > Python code that may have already been written by someone?
>
> > I'm working on a project that involves a check scanner the produces
> > the raw MICR line as text.
>
> > Now, that raw MICR needs to be parsed for the various pieces of info.
> > The problem with MICR is that there is no standard layout. There are
> > some general rules for item placement, but beyond that it is up to the
> > individual banks to define how they choose to position the
> > information.
>
> > I did find an old C program written by someone at IBM... But I've read
> > it and it is Not code that would nicely convert to Python (maybe its
> > all the Python I'm used to, be it seems very poorly written).
>
> > Here is the link to that C code:ftp://ftp.software.ibm.com/software/retail/poseng/4610/4610micr.zip
>
> > I've even tried using boost to generate a Python module, but that
> > didn't go well, and in the end is not going to be a solution for me
> > anyway.. really need access to the Python source.
>
> > Any help at all would be appreciated,
>
> > -mkp
>
> Is there a spec somewhere for this data?  Googling for "MICR data
> format specification" and similar gives links to specifications for
> the MICR character *fonts*, but not for the data content.
>
> And you are right, reverse-engineering this code is more than a 10-
> minute exercise.  (However, the zip file *does* include a nice set of
> test cases, which might be better than the C code as a starting point
> for new code.)
>
> -- Paul


Well, the problem is that the "specification" is that "there is no
specification", thats just the way the MICR data line has evolved in
the banking industry unfortunately for us developers.. That being
said, there are obviusly enough banking companies out that with enough
example data to have intelligent parsers that handle all the
variations. And the C program appears to have all that built into it.

Its just that I would rather not reinvent the wheel (or read old C
code)..

So, the search continues..



From bbxx789_05ss at yahoo.com  Sat Mar 24 16:08:02 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 13:08:02 -0700
Subject: Python object overhead?
In-Reply-To: <mailman.5532.1174687493.32031.python-list@python.org>
References: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
	<mailman.5532.1174687493.32031.python-list@python.org>
Message-ID: <1174766882.119041.294020@y66g2000hsf.googlegroups.com>

On Mar 23, 4:04 pm, Jack Diederich <jackd... at jackdied.com> wrote:
>
> If you make the record a new style class (inherit from object) you can
> specify the __slots__ attribute on the class.  This eliminates the per
> instance dictionary overhead in exchange for less flexibility.
>

How is efficiency improved with __slots__?  Don't you create a list
object that replaces the dictionary object, e.g.:

class Test(object):
        __slots__ = ["m", "n"]




From Graham.Dumpleton at gmail.com  Wed Mar  7 00:00:24 2007
From: Graham.Dumpleton at gmail.com (Graham.Dumpleton at gmail.com)
Date: 6 Mar 2007 21:00:24 -0800
Subject: re-point mod_python - is it possible?
In-Reply-To: <1173240491.770637.27440@t69g2000cwt.googlegroups.com>
References: <1173240491.770637.27440@t69g2000cwt.googlegroups.com>
Message-ID: <1173243624.574888.258390@h3g2000cwc.googlegroups.com>

On Mar 7, 3:08 pm, "leland" <richard.lel... at gmail.com> wrote:
> i've upgraded my RHEL3 box to run python 2.3. problem is, mod_python
> still points to the old python 2.2. is there any way to tell
> mod_python that i've got a new version of python installed, and
> to use that version now?
>
> any help would be great - thanks!

First off, your existing mod_python will only work against Python 2.2.
You cannot simply coax it into trying to use Python 2.3. If you have
completely replaced Python 2.2 with 2.3 such that 2.3 is now the
default Python version, then all you need to do is recompile
mod_python from source code, or install prebuilt mod_python package
compiled against 2.3.

If however you now have both Python 2.2 and 2.3 installed at the same
time in different locations, it can get a bit more tricky. If this is
the case and even if you reinstall mod_python which has been compiled
against 2.3, you can have problems by fact that the way Python
initialises itself involves searching for 'python' executable in PATH.
If the version it finds is actually that for Python 2.2, even though
mod_python is built against 2.3, it may attempt to try and use Python
library from 2.2. If this is the case, you need to ensure that the
PATH environment used by Apache when started finds 'python' for 2.3
first.

Graham



From mail at timgolden.me.uk  Thu Mar  8 11:33:58 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 08 Mar 2007 16:33:58 +0000
Subject: Copy geodatabase(mdb)  if it is locked
In-Reply-To: <14A2A120D369B6469BB154B2D2DC34D206FCFFC4@EXCHVS01.ad.sfwmd.gov>
References: <14A2A120D369B6469BB154B2D2DC34D206FCFFC4@EXCHVS01.ad.sfwmd.gov>
Message-ID: <45F03AF6.8090203@timgolden.me.uk>

Ahmed, Shakir wrote:
> I am trying to copy a geodatabase (.mdb) file from source to destination
> using
> 
> shutil.copyfile(src, dest)
> 
> It is working fine but the main problem when the destination (.mdb) file
> is locked by other users then it's bumped out and not copied over.
> 
> Is there any way to copy the locked .mdb file and overwrite it.


Usual rejoinder: is there any way to do it outside Python? (As far
as I know, there isn't although I'm happy to be wrong). If you haven't
already, try one of the platform-specific lists, since this is
really an OS-issue.

For a Python-ish solution, you might have a retries loop, which
kept trying and backing away for increasing periods of time until
it gave up or succeeded. Rough-and-ready and completely untested:

<code>
import shutil
import time

src = "c:/temp/temp.mdb"
dest = "c:/temp/temp2.mdb"

n_retries = 5
base_delay = 2

n_retry = 0
while n_retry < n_retries:
   try:
     shutil.copyfile (src, dest)
   except IOError:
     time.sleep (2 ** n_retry)
     n_retry += 1
     continue
   else:
     print "succeeded after", n_retry, "retries"
     break
else:
   print "failed after", n_retry, "retries"

</code>

TJG


From deets at nospam.web.de  Wed Mar 28 07:42:43 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 Mar 2007 13:42:43 +0200
Subject: XML Parsing
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
	<56us4mF2a9rq7U1@mid.uni-berlin.de>
	<1175077346.611452.164530@b75g2000hsg.googlegroups.com>
Message-ID: <56v2ljF2a9pa3U1@mid.uni-berlin.de>

> 
> The example is valid well-formed XML. It is permitted to use the ":"
> character in element names. Whether one should in a non namespace
> context is a different matter.

It is? I was always under the impression one has to declare a namespace. But
this might be shaped from the usage of XSLT and W3C schema that require
these.

Diez


From kadeko at gmail.com  Mon Mar  5 06:26:28 2007
From: kadeko at gmail.com (looping)
Date: 5 Mar 2007 03:26:28 -0800
Subject: Return type of operator on inherited class
Message-ID: <1173093988.715433.205730@t69g2000cwt.googlegroups.com>

Hi,
my question is on this example:

class MyStr(str):
    def hello(self):
        print 'Hello !'

s1 = MyStr('My string')
s2 = MyStr('My second string')

s1.hello()
s2.hello()

s = s1 + s2

s.hello()

>>>
Hello !
Hello !
Traceback (most recent call last):
  File "<string>", line 204, in run_nodebug
  File "<module1>", line 13, in <module>
AttributeError: 'str' object has no attribute 'hello'

How could I get a type MyStr from the 'plus' (__add__) operation
without overriding it in my class ?
I need to override *every* operator I like to use ?



From greg at cosc.canterbury.ac.nz  Thu Mar  1 03:53:02 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 01 Mar 2007 21:53:02 +1300
Subject: Vector, matrix, normalize, rotate. What package?
In-Reply-To: <1172616572.045690.17550@k78g2000cwa.googlegroups.com>
References: <1172616572.045690.17550@k78g2000cwa.googlegroups.com>
Message-ID: <54ninmF200prlU1@mid.individual.net>

Mattias Br?ndstr?m wrote:

> 1. Create 3d vectors.
> 2. Normalize those vectors.
> 3. Create a 3x3 rotation matrix from a unit 3-d vector and an angle in
> radians.
> 4. Perform matrix multiplication.
> 
> Meybe someone knows a way to use numpy for 2 and 3?

Here's some code I wrote recently to do normalisation
of vectors using Numeric:

   from Numeric import add, sqrt

   def dots(u, v):
     """Return array of dot products of arrays of vectors."""
     return add.reduce(u * v, -1)

   def units(v):
     """Array of unit vectors from array of vectors."""
     ds = 1.0 / sqrt(dots(v, v))
     return ds * v

These work best if you give them multiple vectors to
work on at once, otherwise you don't get much advantage
from using Numeric.

I don't have anything to hand for rotation about a
vector, but if you can find a formula, you should be
able to use similar techniques to "vectorize" it
using Numeric.

--
Greg


From FlipFish2007 at yahoo.com  Thu Mar 29 10:22:20 2007
From: FlipFish2007 at yahoo.com (FlipFish2007 at yahoo.com)
Date: 29 Mar 2007 07:22:20 -0700
Subject: Creating a new data structure while filtering its data origin.
In-Reply-To: <mailman.5727.1175117350.32031.python-list@python.org>
References: <mailman.5727.1175117350.32031.python-list@python.org>
Message-ID: <1175178140.639383.132720@r56g2000hsd.googlegroups.com>

On Mar 28, 4:44 pm, <m... at fibertel.com.ar> wrote:
> Hi everyone.
>
> I'm trying to work with very simple data structures but I'm stuck in the very first steps. If someone has the luxury of a few minutes and can give an advice how to resolve this, I'll really appreciate it.
>
> 1- I have a list of tuples like this:
> lista= [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2), (168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203, 141, 1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568, 142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]
> and I want to end with a dict like this:
> {141: {1: [203, 213, 201], 2: [168, ], 3: [162, ]}, 142: {1: [503, 513, 501], 2: [568, ], 4: [562, ]}}
>  the logic of the final output:
>  a) the outer dict's key is a set() of the 2rd value of the input.
>  b) the inner dict's key is a set() of the 3th value for tuples which 3rd value equals a).
>  c) the inner list will be fill up with the 1st value of every tuple which 3rd value equals b) and its 2rd value equals a).
>
> So far, the only thing it seems I can achieve is the first part:
> outer_dict = dict([(x,dict()) for x in set(row[1] for row in lista)])
>
> >From then on, I'm starting to get tired after several successful failures (I tried with itertools, with straight loops ...) and I don't know which can be the easier way to get that final output.
>
> Thanks in advance.

dict([[b,dict([[k, dict([[x, None] for (x,y,z) in lista if y==b and
z==k]).keys()] for (i,j,k) in lista if j==b])] for (a,b,c) in lista])



From codecraig at gmail.com  Fri Mar  9 14:45:17 2007
From: codecraig at gmail.com (abcd)
Date: 9 Mar 2007 11:45:17 -0800
Subject: Are Lists thread safe?
In-Reply-To: <1173469137.897102.298120@p10g2000cwp.googlegroups.com>
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
	<1173469137.897102.298120@p10g2000cwp.googlegroups.com>
Message-ID: <1173469517.797876.262330@t69g2000cwt.googlegroups.com>

Thanks for the link.  I saw that one in my google search but didn't
visit it for some reason.

Looks like most operations should be just fine.

Thanks.



From stargaming at gmail.com  Mon Mar 12 05:42:50 2007
From: stargaming at gmail.com (Stargaming)
Date: Mon, 12 Mar 2007 10:42:50 +0100
Subject: New to Python
In-Reply-To: <1173689360.138935.6780@j27g2000cwj.googlegroups.com>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<1173689360.138935.6780@j27g2000cwj.googlegroups.com>
Message-ID: <et37as$1f4s$1@ulysses.news.tiscali.de>

Bert Heymans schrieb:
> On Mar 12, 3:02 am, Alberto Vieira Ferreira Monteiro
> <albm... at centroin.com.br> wrote:
> 
>>Hi, I am new to Python, how stupid can be the questions I ask?
>>
>>For example, how can I add (mathematically) two tuples?
>>x = (1,2)
>>y = (3,4)
>>How can I get z = (1 + 3, 2 + 4) ?
>>
>>Alberto Monteiro
> 
> 
> 
> Alberto -
> 
> List comprehesion, no doubt about it:
> 
>>>>z = [k+p for k,p in (x, y)]
>>>>z
> 
> [3, 7]
> 
> - Bert
> 

Since 1+3 is not really (only if you use rally bad approximations) 3 
(neither 2+4 is 7!), i'd rather prefer using zip:
 >>> x = (1,2)
 >>> y = (3,4)
 >>> [k+p for k,p in (x,y)] # wrong one
[3, 7]
 >>> [k+p for k,p in zip(x,y)] # zip-version
[4, 6]

What your's is doing is unpacking the contents of x first to k and p and 
adding them to each other and afterwards doing the same with y's contents.


From rrs at researchut.com  Thu Mar 15 17:31:29 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Fri, 16 Mar 2007 03:01:29 +0530
Subject: lock problem
Message-ID: <hiqoc4-fnq.ln1@www.researchut.com>

Hi,

I think there is some lock problem.
Let me show the code first

import os
import sys
import string
import tempfile

import threading
import Queue

from time import sleep

_hostname = None
_username = None
_password = None
_ldapDataFile = None

if _hostname is None or _username is None or _password is None or _ldapDataFile
is None:
    sys.stderr.write("Please first set the credentials properly.\n")
    sys.exit(1)

_ldapPreCommand = 'ldapsearch -LLL -z 0 "(Sn='
_ldapPostCommand = '*)" -h ' + _hostname + ' -x -D "'  + _username + '" -b
Cn=users,DC=hq,DC=domain,DC=com' + " -w " + _password
NumberOfThreads = 5


#char = 's'
#ldapCommand = _ldapPreCommand + char + _ldapPostCommand
#x = os.system(ldapCommand)
#if x == 1024:
#    print "I'm in the exception"
#print x
#sys.exit(1)

ldap_attributes =
['dn:', 'cn:', 'sn:', 'l:', 'st:', 'title:', 'description:', 'postalCode:', 'telephoneNumber:', 'facsimileTelephoneNumber:',
                   'givenName:', 'mail:', 'homePhone:', 'mobile:', 'pager:']

try:
    writeFile = open(_ldapDataFile, 'w')
except IOError:
    sys.stderr.write("Couldn't open file %s to write.\n" % (writeFile) )
    sys.exit(1)

#print "Writing data to %s\n" % (temp_file_name)

def RecordFetcher(char):
        (temp_file_fd, temp_file_name) = tempfile.mkstemp()
        os.environ['__kabc_ldap'] = temp_file_name
        sleep(5) #Let's not thrash the exchange server ;-)
        ldapCommand = _ldapPreCommand + char + _ldapPostCommand
        if os.system(ldapCommand + "> $__kabc_ldap") != 0:
            sys.stderr.write("Couldn't execute the command %s\n" %
(ldapCommand) )
            sys.exit(1)
        #temp_file_name = "/tmp/tmpnhYrps"
        try:
            readFile = open(temp_file_name, 'r')
        except IOError:
            sys.stderr.write("Couldn't open file %s to read.\n" % (readFile) )
            sys.exit(1)
            
        for record in readFile.readlines():
            if record.startswith(' '): # Remove the junk
                pass
            record = string.rstrip(record, "\n")
            for attrib in ldap_attributes:
                if record.startswith(attrib):
                    try:
                        FileLock.acquire(True)
                        
                        if ldap_attributes[0] == attrib: #This attribute is
common/mandatory in all records, so we can rely on it
                           writeFile.write("\n")
                           
                        writeFile.write(record)
                        writeFile.write("\n")
                        
                    finally:
                        writeFile.flush()
                        FileLock.release()
                    break
        readFile.close()
        os.remove(temp_file_name)
        #writeFile.write("\n")
    
    
def run(request, response, func=RecordFetcher):
    while 1:
        item = request.get()
        if item is None:
            break
        (char, subChar) = item
        
        response.put(func(char+subChar) )

# Start from here
requestQueue = Queue.Queue()
responseQueue = Queue.Queue()

FileLock = threading.Lock()

thread_pool = [
               threading.Thread(
                                target=run,
                                args=(requestQueue, responseQueue)
                                )
               for i in range(NumberOfThreads)
               ]

for t in thread_pool: t.start()

for char in string.lowercase:
    # I know this is ugly. Too many cycles
    # But ldapsearch or exchange is restricting, the query max result limit is
1000
    for subChar in string.lowercase:
        requestQueue.put( (char, subChar) )

for t in thread_pool: requestQueue.put(None)

for t in thread_pool: t.join()

writeFile.close()


=====

Now as per the above code, "aa" is the first string which will be executed in
Thread-1. In my query to the ldap server, I am getting a record which matches
the "aa" string. I've verified it by putting a breakpoint and checking the
value.

The problem is that when I run the program manually, I don't get the data from
the first thread i.e. of the string "aa".

I'm not sure if there's something wrong in the code mentioned above or is it
really a lock problem.

Can somebody please help about where I'm doing any mistake ?

Thanks,
Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  1 18:25:12 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 02 Mar 2007 00:25:12 +0100
Subject: design question: no new attributes
In-Reply-To: <61IFh.7997$KE2.5053@trnddc06>
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05><mailman.4475.1172614860.32031.python-list@python.org><3c5Fh.3664$Tg7.2156@trnddc03>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08>
	<45e60fdc$0$30655$426a34cc@news.free.fr>
	<xgBFh.4185$854.1692@trnddc04>
	<45e7438f$0$29410$426a74cc@news.free.fr>
	<61IFh.7997$KE2.5053@trnddc06>
Message-ID: <45e75901$0$6913$426a74cc@news.free.fr>

Alan Isaac a ?crit :
> The security application seems to call for roles.

Considering that a role is a set of permissions in a context. The 
application doesn't want to say "you need this role", but "you need to 
have a role that has this permission" (nb : this is based on Zope's 
security model).

> I'll have to think about the schema example.
> But in any case, my question was poorly stated.
> I started out wanting to trap was the dynamic
> addition of attributes to class instances after
> initialization.

 From withing methods of the class, or from the outside world ? In the 
first case, pylint is what you're looking for.

> While you responded to my later question
> as asked, the response does not I think take this context
> into account.

Of course - this was not what I was answering to !-)

Now, in the above context, I still don't think your solution is the best 
option.

> 
>>As a side note :  in Python, *all* attributes are "dynamically created".
>>... Writing methods
>>within the class statement body makes things clearer, but is by no mean
>>mandatory:
> 
> 
> Point taken.  And I understand it means that my talk of
> "after initialization" above contains some ambiguity.

Indeed !-)

> One last point. While I remain interested in examples of how
> "late" addition of attributes to class instances is useful,

Then read the sources of packages / frameworks like SQLAlchemy, 
SQLObject, FormEncode, CherryPy, TurboGears, Django, etc - and probably 
a lot of other.

Heck, FWIW, modules are objects too - instances of class 'module', and 
all the top-level names of a module are de facto examples of "late 
addition of attributes to a class instance" !-)

> I must note that everyone who responded agreed that it
> has been a source of bugs.

Yes, of course - typos happens. But I've seen much more bugs introduced 
by all the boilerplate and complexities needed to work around arbitrary 
restrictions imposed by some well-known mainstream languages.

My experience with Python is that typos, type errors and all this class 
of programmer error are usually *very* quickly noticed (ie : within 
minutes).

> This seems to argue against a
> general ban on "locking" objects in some way, in some
> circumstances.

I'd rather go for better (well... pylint is already a pretty nice tool) 
code checkers.

My 2 cents...


From marcin.ciura at poczta.NOSPAMonet.pl  Wed Mar 21 17:53:55 2007
From: marcin.ciura at poczta.NOSPAMonet.pl (Marcin Ciura)
Date: Wed, 21 Mar 2007 22:53:55 +0100
Subject: Python 3000 idea: reversing the order of chained assignments
Message-ID: <ets9hc$74f$1@news.onet.pl>

Given
   class Node(object):
       pass

   node = Node()
   nextnode = Node()

I tried to refactor the following piece of code
   node.next = nextnode
   node = nextnode

as
   node = node.next = nextnode

only to discover that Python performs chained assignments
backwards compared to other languages, i.e. left-to-right
instead of right-to-left. From the user's perspective,
I can't think of any reasonable argument for keeping it
this way in Python 3000. What is your opinion?
   Marcin


From aahz at pythoncraft.com  Sat Mar 31 12:33:39 2007
From: aahz at pythoncraft.com (Aahz)
Date: 31 Mar 2007 09:33:39 -0700
Subject: os.system questions
References: <mailman.5804.1175341245.32031.python-list@python.org>
Message-ID: <eum2h3$fsv$1@panix3.panix.com>

In article <mailman.5804.1175341245.32031.python-list at python.org>,
Eric Price <soyouthinkimgonnalikethis at hotmail.com> wrote:
>
>I have a couple bugs to work out in the below script; namely, I don't
>know how to capture the result of an os.system command, nor am I
>convinced that the call to os.system actually results in the execution
>of the command. Here is the script:

Although you've already figured out the problem, I'll just make the
standard recommendation for the subprocess module, assuming you have
Python 2.4 or later.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From tonyr1988 at gmail.com  Thu Mar 15 11:13:53 2007
From: tonyr1988 at gmail.com (tonyr1988)
Date: 15 Mar 2007 08:13:53 -0700
Subject: Pickle Problem
Message-ID: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>

I'm a complete python n00b writing my first program (or attempting to,
anyway). I'm trying to make the transition from Java, so if you could
help me, it would be greatly appreciated. Here's the code I'm stuck on
(It's very basic):

class DemoClass:
	def __init__(self):
		self.title = ["Hello", "Goodbye"]

	def WriteToFile(self, path = "test.txt"):
		fw = file(path, "w")
		pickle.dump(self.title, fw)
		fw.close()

if __name__=='__main__':
	x = DemoClass
	x.WriteToFile

It doesn't do any file I/O at all (that I see). I hope my syntax is
alright. If I just call WriteToFile, shouldn't it perform with the
default path? It gives me no errors and pretends to execute just fine.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 12 06:56:43 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 12 Mar 2007 11:56:43 +0100
Subject: can not load mod_python on apache
In-Reply-To: <1173686290.295990.272190@p10g2000cwp.googlegroups.com>
References: <1173686290.295990.272190@p10g2000cwp.googlegroups.com>
Message-ID: <45f531f4$0$6077$426a34cc@news.free.fr>

liecto a ?crit :
> winxp sp2
> modpython 3.3.1
> apache 2.2.4
> python 2.5
> 
> when i start apache ,it failed. and the error is
> ==============
> The Apache service named  reported the following error:
>>>> httpd.exe: Syntax error on line 166 of F:/mylg/apache-more/local/apache/Apache2/conf/httpd.conf: Cannot load F:/mylg/apache-more/local/apache/Apache2/modules/mod_python.so into server: \xd5\xd2\xb2\xbb\xb5\xbd\xd6\xb8\xb6\xa8\xb5\xc4\xc4\xa3\xbf\xe9\xa1\x     .
> ===============
> 
> who can help me??
> 
Someone on either apache or mod_python mailing lists ? (you problem is 
about apache conf, not Python).


From http  Wed Mar  7 21:46:40 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 18:46:40 -0800
Subject: Bug in python!? persistent value of an optional parameter in
	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
Message-ID: <7xfy8gqwof.fsf@ruckus.brouhaha.com>

"C Barr Leigh" <cpblPublic at gmail.com> writes:
> Help! Have I found a serious bug?
> This seems like highly undesired behaviour to me. From the program
> below, I get output:

It is intentional, not a bug, see the docs.  Whether it's desirable is
a different question.


From inq1ltd at verizon.net  Thu Mar  8 13:04:42 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 08 Mar 2007 13:04:42 -0500
Subject: tkinter text editor
In-Reply-To: <espfmi$7ev$1@ss408.t-com.hr>
References: <espfgv$6q7$1@ss408.t-com.hr> <espfmi$7ev$1@ss408.t-com.hr>
Message-ID: <200703081304.42752.inq1ltd@verizon.net>

On Friday 09 March 2007 12:04, Gigs_ wrote:
> Gigs_ wrote:
> > I'm writing text editor.
> >
> > How to enable/disable (cut, copy etc.) when
> > text is selected/not selected
>
> Btw it is cut copy ... in edit menu


state = 'diabled'   ## no change allowed
                           ## to Text Wiget  

state = 'normal'  ## default for Text Wiget

jim-on-linux
http:\\www.inqvista.com


From python at rcn.com  Mon Mar  5 00:41:30 2007
From: python at rcn.com (Raymond Hettinger)
Date: 4 Mar 2007 21:41:30 -0800
Subject: Python stock market analysis tools?
In-Reply-To: <1173066776.884126.86810@64g2000cwx.googlegroups.com>
References: <1173066776.884126.86810@64g2000cwx.googlegroups.com>
Message-ID: <1173073290.907489.101150@t69g2000cwt.googlegroups.com>

On Mar 4, 7:52 pm, "Mudcat" <mnati... at gmail.com> wrote:
> I have done a bit of searching and can't seem to find a stock market
> tool written in Python that is active. Anybody know of any? I'm trying
> not to re-create the wheel here.

What kind of tool do you want?  Getting quotes is the easy part:

import urllib
symbols = 'ibm jpm msft nok'.split()
quotes = urllib.urlopen( 'http://finance.yahoo.com/d/quotes.csv?s=' +
         '+'.join(symbols) + '&f=l1&e=.csv').read().split()
print dict(zip(symbols, quotes))

The hard part is raising capital and deciding what to buy, sell, or
hold.


Raymond



From donstockbauer at hotmail.com  Mon Mar 19 04:42:41 2007
From: donstockbauer at hotmail.com (Don Stockbauer)
Date: 19 Mar 2007 01:42:41 -0700
Subject: 911 was a RACIST crime by YANK BASTARDS against all other NATIONS
	Re: *POLL* How many sheeple believe in the 911 fairy tale and
	willing to accept an Orwellian doublespeak and enslavement world ?
In-Reply-To: <1174286957.647696.43390@d57g2000hsg.googlegroups.com>
References: <1174284614.170100.264620@b75g2000hsg.googlegroups.com>
	<1174286336.522011.199040@e65g2000hsc.googlegroups.com>
	<1174286957.647696.43390@d57g2000hsg.googlegroups.com>
Message-ID: <1174293761.623827.8790@y66g2000hsf.googlegroups.com>

911's primary utility was that, inadvertently, it sparked off the
formation of the global brain:

The Social Superorganism and its Global Brain

http://pespmc1.vub.ac.be/SUPORGLI.html

Have a nice Monday, all.

- Don



From grante at visi.com  Fri Mar  9 16:42:31 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 09 Mar 2007 21:42:31 -0000
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<pan.2007.03.09.21.29.07.201983@gmx.net>
	<1173476037.284461.211990@8g2000cwh.googlegroups.com>
Message-ID: <12v3l67ipk8uh4f@corp.supernews.com>

On 2007-03-09, israphelr at googlemail.com <israphelr at googlemail.com> wrote:
> On Mar 9, 9:29 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> In <1173475520.292989.239... at p10g2000cwp.googlegroups.com>, israphelr
>> wrote:
>
>> In [57]: 'reversed string'[::-1]
>> Out[57]: 'gnirts desrever'
>
>
> Sorry, I didn't understand this.

First read this:
  http://docs.python.org/tut/node5.html#SECTION005120000000000000000
then this:
  http://www.python.org/doc/2.3/whatsnew/section-slices.html

-- 
Grant Edwards                   grante             Yow!  I was in EXCRUCIATING
                                  at               PAIN until I started
                               visi.com            reading JACK AND JILL
                                                   Magazine!!


From aleax at mac.com  Sun Mar 25 01:20:45 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 24 Mar 2007 22:20:45 -0700
Subject: Using remote source code
References: <1174795795.112606.21720@e65g2000hsc.googlegroups.com>
Message-ID: <1hvi1i4.11qqgaq109btn3N%aleax@mac.com>

<pyapplico at gmail.com> wrote:

> Is there any possible way that I can place a .py file on the internet,
> and use that source code in an .py file on my computer?

You can write an import hook in any way you like; see
<http://www.python.org/dev/peps/pep-0302/> .

Here's a trivial example (bereft of much error checking, etc).  I've
uploaded to http://www.aleax.it/foo.py a toy module w/contents:

def foo(): return 'foo'

Here's a tiny program to import said module from my site:


import urllib2, sys, new

theurl = 'http://www.aleax.it/'

class Examp(object):
    names = set([ 'foo', ])
    def find_module(self, fullname, path=None):
        if fullname not in self.names: return None
        self.foo = urllib2.urlopen(theurl+fullname+'.py')
        return self
    def load_module(self, fullname):
        module = sys.modules.setdefault(fullname,
                                          new.module(fullname))
        module.__file__ = fullname
        module.__loader__ = self
        exec self.foo.read() in module.__dict__
        return module

def hooker(pathitem):
    print 'hooker %r' % pathitem
    if pathitem.startswith(theurl): return Examp()
    raise ImportError

sys.path_hooks.append(hooker)
sys.path.append(theurl)

import foo
print foo.foo()



Alex


From gagsl-py2 at yahoo.com.ar  Wed Mar  7 12:34:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 14:34:14 -0300
Subject: How to build a Windows service using win32?
References: <3802.168.103.93.50.1173285944.squirrel@maps.hostgis.com>
Message-ID: <op.totxrc1tx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 07 Mar 2007 13:45:44 -0300, Gregor Mosheh <gregor at hostgis.com>  
escribi?:

> Now, I did stumble upon the solution to this one this morning, after a
> fresh night of sleep: I re-ran "python tester.py install" I got a message
> that the service had been updated, and now it runs! Hooray!
>
> Any insight into why that would be the case? Does pythonservice.exe keep  
> a
> cached copy or some such, so I'll have to re-install the service after
> code changes?

I don't think so. After code changes, stopping and restarting the service  
should be enough.
Maybe you had registered another source file, maybe on another directory,  
using the same service name?

-- 
Gabriel Genellina



From knipknap at gmail.com  Sat Mar 17 19:02:50 2007
From: knipknap at gmail.com (Samuel)
Date: 17 Mar 2007 16:02:50 -0700
Subject: MIME Magic
Message-ID: <1174172570.473458.215460@y80g2000hsf.googlegroups.com>

Hi,

How can I determine the type of a file from "magic bytes", similar to
what the "file" command on unix does? I found

http://docs.python.org/lib/module-mimetypes.html

but this only seems to use the filename (extension) for finding the
type. Any hints?

-Samuel



From wbhk at unm.edu  Thu Mar 15 17:46:12 2007
From: wbhk at unm.edu (William Hudspeth)
Date: Thu, 15 Mar 2007 15:46:12 -0600
Subject: Using wildcards with Popen in the Subprocess module
Message-ID: <1173995172.4612.34.camel@localhost>

Hello Mike,

Thanks for responding. I need to pass multiple filenames to an
executable. The filenames are similar to one another, but differ only
slightly, hence the use of the wildcard. The executable works well from
the command line if I pass in a wildcard filename, but Popen can't
expand the wildcard.

>From command line:
% command /path_to_files/filename*.doc

With Popen:
var1="/path_to_files/filnames*.doc"
result=Popen(["command",var1]).wait()

Thanks, I will look into the os.system route.

Bill



From nagle at animats.com  Thu Mar 22 12:21:12 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 22 Mar 2007 09:21:12 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<7WjMh.318$YL5.80@newssvr29.news.prodigy.net>
	<1hvcadb.134pbvp1y39wi3N%aleax@mac.com>
	<DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
Message-ID: <y1yMh.11133$P47.69@newssvr22.news.prodigy.net>

Mark T wrote:
> 
> "Alex Martelli" <aleax at mac.com> wrote in message 
> news:1hvcadb.134pbvp1y39wi3N%aleax at mac.com...
> 
>> John Nagle <nagle at animats.com> wrote:
>>
>>> Marcin Ciura wrote:
>>>
>>> > Neither would I. I must have expressed myself not clearly enough.
>>> > Currently
>>> > x = y = z
>>> > is roughly equivalent to
>>> > x = z
>>> > y = z
>>> > I propose to change it to
>>> > y = z
>>> > x = z
>>>
>>> Actually, it is equivalent to
>>>
>>>       y = z
>>>       x = y
>>
>>
>> Not really:
>>
>>>>> class chatty(object):
>>
>> ...   def __init__(self): self.__dict__['__hide'] = {}
>> ...   def __setattr__(self, name, value):
>> ...     print 'sa', name, value
>> ...     self.__dict__['__hide'][name] = value
>> ...   def __getattr__(self, name):
>> ...     print 'ga', name
>> ...     return self.__dict__['__hide'].get(name)
>> ...
>>
>>>>> c = chatty()
>>>>> x = c.zop = 23
>>
>> sa zop 23
>>
>>>>>
>>
>> As you can see, there is no read-access to c.zop, which plays the role
>> of y there.
>>
>>
>> Alex
> 
> 
> This is interesting:
> 
>>>> class Test(object):
> 
> ...   def __getattribute__(self,n):
> ...     print 'reading',n
> ...     return object.__getattribute__(self,n)
> ...   def __setattr__(self,n,v):
> ...     print 'writing',n,v
> ...     return object.__setattr__(self,n,v)
> ...
> 
>>>> x=Test()
>>>> x.a=1; x.b=2; x.c=3
> 
> writing a 1
> writing b 2
> writing c 3
> 
>>>> x.a=x.b=x.c
> 
> reading c
> writing a 3
> writing b 3
> 
>>>>
> 
> I wouldn't have expected "a" to be assigned first in a right-to-left 
> parsing order.  The result is the same in any case.
> 
> -Mark T.

    That's fascinating.  Is that a documented feature of the language,
or a quirk of the CPython interpreter?

				John Nagle


From MonkeeSage at gmail.com  Thu Mar  1 14:02:09 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Mar 2007 11:02:09 -0800
Subject: Yet another unique() function...
In-Reply-To: <7xtzx6oszi.fsf@ruckus.brouhaha.com>
References: <1172628630.408421.271310@t69g2000cwt.googlegroups.com>
	<1172647505.784091.193710@q2g2000cwa.googlegroups.com>
	<7x7iu2niif.fsf@ruckus.brouhaha.com>
	<1172697024.754286.325450@m58g2000cwm.googlegroups.com>
	<1172698992.142640.55250@z35g2000cwz.googlegroups.com>
	<7xtzx6oszi.fsf@ruckus.brouhaha.com>
Message-ID: <1172775729.167501.151130@v33g2000cwv.googlegroups.com>

On Feb 28, 3:46 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> I didn't think so but I can't conveniently test it for now.  Maybe
> tonight.

After playing with it a bit (only have 2.5 on this box), it looks like
you do need to subscript the next() call. For example, the return from
"unique( [[1], [2]] )" is "[(0, [1]), (1, [2])]". I'm not overly
familiar with the functional paradigm or itertools though, so I might
have missed something.

Regards,
Jordan



From jjl at pobox.com  Wed Mar 21 16:20:08 2007
From: jjl at pobox.com (John J. Lee)
Date: Wed, 21 Mar 2007 20:20:08 GMT
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
Message-ID: <871wjiuz5q.fsf@pobox.com>

"Paddy" <paddy3118 at googlemail.com> writes:

> I just had a link to Tim peters first post on doctest:
> http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> removed from http://en.wikipedia.org/wiki/Doctest as it doesn't fit
> their guidelines for external links.
> I wonder, could maybe the official website be persuaded to host a copy
> so that it could be linked to?
> 
> Tim, would you object?

It (wikipedia) is a wiki, why not edit the page and paste it in?


John


From xiong.xu.cn at gmail.com  Wed Mar 14 05:02:53 2007
From: xiong.xu.cn at gmail.com (imx)
Date: 14 Mar 2007 02:02:53 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173822266.306935.199410@o5g2000hsb.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
	<1173728423.775330.164470@t69g2000cwt.googlegroups.com>
	<1173731204.621260.192000@30g2000cwc.googlegroups.com>
	<1173747288.760536.60020@j27g2000cwj.googlegroups.com>
	<1173822266.306935.199410@o5g2000hsb.googlegroups.com>
Message-ID: <1173862973.001501.200090@o5g2000hsb.googlegroups.com>

On 3?14?, ??5?44?, "daftspan... at gmail.com" <daftspan... at gmail.com>
wrote:
> > The reason I want to do simulation but not just crawling is : we have
> > to check many web pages' front page to see whether it conform to our
> > visual standard, e.g, it should put a search box on the top part of
> > the page. It's tedious for human work. So I want to 'crawl and save
> > the visual presentation of the web site automatically', and check
> > these image files later with human eyes.
>
> > -Xiong
>
> Hi Xiong,
>
> I have been working on a program to do something very similar to
> generate thumbnails of websites.
>
> The code is in IronPython (which may put you off!) and would need
> modified or scripted with pywinauto to deal with multiple images.
>
> Let me know if it is of use to you and I will upload it.
>
> Cheers,
> Davy

Cool, but does it mean that I will need .net to run the code?

Xiong



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 25 07:28:27 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 25 Mar 2007 13:28:27 +0200
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
	<mailman.5541.1174707796.32031.python-list@python.org>
Message-ID: <56n4mpF2a84lkU1@mid.individual.net>

Facundo Batista wrote:

> "not line" and "len(line) == 0" is the same as long as "line" is a
> string.
> 
> He's checking ok, 'cause a "blank line" has a lenght > 0 (because
> of newline).

Ah, K. Normally, I strip the read line and then test "if not line".
His check /is/ okay, but IMHO it's a little bit weird.
 
> Unless I understood it wrong, it's just an object that holds the
> line inside.

A Python string would technically be the same ;)

> Just OO purity, not practicality...

:)

Regards,


Bj?rn 

-- 
BOFH excuse #378:

Operators killed by year 2000 bug bite.



From san.gujar at gmail.com  Mon Mar 26 08:00:54 2007
From: san.gujar at gmail.com (sandeep patil)
Date: 26 Mar 2007 05:00:54 -0700
Subject: python on window
In-Reply-To: <mailman.5507.1174641107.32031.python-list@python.org>
References: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
	<mailman.5507.1174641107.32031.python-list@python.org>
Message-ID: <1174910454.043983.171650@y80g2000hsf.googlegroups.com>

i have written this program but i have gott following error,
in anather proram "indentation error" sir how i will indent in my
editor

#test.py
>>> def invert(table):
	index=()
	for key in table:
		value=table[key]
		if not index.has_key(value):
			index[value]=[]
			index[value].append(key)
		return index


>>> phonebook = {'sandeep':9325, 'amit':9822, 'anand':9890, 'titu': 9325}
>>> phonebook
{'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
>>> print phonebook
{'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
>>> inverted_phonebook = invert(phonebook)

Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    inverted_phonebook = invert(phonebook)
  File "<pyshell#9>", line 5, in invert
    if not index.has_key(value):
AttributeError: 'tuple' object has no attribute 'has_key'
>>> interted_phonebook= invert(phonebook)

Traceback (most recent call last):
  File "<pyshell#14>", line 1, in <module>
    interted_phonebook= invert(phonebook)
  File "<pyshell#9>", line 5, in invert
    if not index.has_key(value):
AttributeError: 'tuple' object has no attribute 'has_key'
>>>



From duncan.booth at invalid.invalid  Mon Mar  5 07:26:06 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Mar 2007 12:26:06 GMT
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
	<Xns98EA5C051525Cduncanbooth@127.0.0.1>
	<7xtzwz9aru.fsf@ruckus.brouhaha.com>
Message-ID: <Xns98EA7E7E07F16duncanbooth@127.0.0.1>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> Duncan Booth <duncan.booth at invalid.invalid> writes:
>> If you try connecting to 'www.showmyip.com' and requesting '/xml/' it 
>> should work.
> 
> If the firewall is really obnoxious, it can bounce consecutive queries
> around between multiple originating IP addresses.  That is uncommon
> but it's been done from time to time.

Yes, each connection through the firewall needs to have a unique 
originating ip and port number. If there are too many machines inside the 
firewall then you may need to allocate multiple ip addresses on the 
outside. I would hope that in general a single internal IP should map to 
one external IP at a time (otherwise you would have problems with ip based 
session persistence connecting to load balanced systems), but you might 
expect to bounce round different IPs after periods of inactivity.

Also you could have multiple levels of NAT in which case the question 
becomes whether Steven wants the IP as seen from outside the immediate 
firewall or outside the final one. Maybe he should be using IPv6 to avoid 
all this?


From exarkun at divmod.com  Mon Mar 26 10:07:30 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 26 Mar 2007 09:07:30 -0500
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174916838.757839.143310@e65g2000hsc.googlegroups.com>
Message-ID: <20070326140730.18920.1562051917.divmod.quotient.5654@ohm>

On 26 Mar 2007 06:47:18 -0700, "Nomad.C at gmail.com" <nomad.c at gmail.com> wrote:
>On Mar 26, 2:42 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> On 26 Mar 2007 06:20:32 -0700, "Noma... at gmail.com" <noma... at gmail.com> wrote:
>>
>> >OK...
>> >I've been told that Both Fortran and Python are easy to read, and are
>>
>> Python is hugely easier to read.
>>
>> >quite useful in creating scientific apps for the number crunching, but
>> >then Python is a tad slower than Fortran because of its a high level
>>
>> Fortran is massively faster than Python.
>>
>> >language nature, so what are the advantages of using Python for
>> >creating number crunching apps over Fortran??
>>
>> You can get the speed of fortran in Python by using libraries like
>> Numeric without losing the readability of Python.
>>
>
>Can you back this up with some source??

Half the code in Numeric was compiled from fortran.  Need I go on? :)

Jean-Paul


From psdasilvaX at esotericaX.ptX  Tue Mar 13 12:15:19 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Tue, 13 Mar 2007 16:15:19 +0000
Subject: Request for a change in the csv module.
In-Reply-To: <55nie2F255kfqU1@mid.uni-berlin.de>
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
	<1173747644.616698@jubilee.claranet.pt>
	<55n53lF25s78sU1@mid.uni-berlin.de>
	<1173785251.78605@jubilee.claranet.pt>
	<55nie2F255kfqU1@mid.uni-berlin.de>
Message-ID: <1173804571.422014@jubilee.claranet.pt>

Diez B. Roggisch escreveu:
> Paulo da Silva wrote:
...

> 
> That it does convert non-string-values to strings when writing could be seen
> as convenience, or actual bug as it might cause troubles as you perceived
> them - but the solution would clearly be to get rid of this functionality,
> not enhance it.


It's just a matter of
personal opinion, and IMO, taking in consideration what other python
modules provide, a csv module should make the appropriate data
conversions. It is simple to implement for most (all?) cases and it will
bring a lot of functionality. You just output things.
In csv output you don't need special data formats. Only the data to the
most available precision. Dates are a very special case, as are the
separators, line terminators, etc.

The python way of exporting this data should be something like:
	class MyDialect(Dialect):
		...
		locale="pt_PT at euro"
		dateformat="YYYY-MM-DD hh:mm:ss"

	...
	w=csv.writer(f,dialect=MyDialect)
	w.writerows(foo)

Frequent tasks should be done by the modules. Not by the users.
And csv is unusable without output formatting. This is particulary true
if, as you said, the csv didn't provide any conversion at all.
So, why force the programmers to repeat the same tedious procedures
whenever they want to use csv, not to talk about the lack of performance
that implies?


From deets at nospam.web.de  Fri Mar  9 09:05:29 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 15:05:29 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
Message-ID: <55d7t9F240tp2U1@mid.uni-berlin.de>

> It sounds like other Python users *do* like to do the kind of things I
> suggested, but seasoned users would rather rely on macros and features
> of specific editors. Unfortunately, to a newbie like myself, these
> seem like obscure 'tricks' to be mastered rather than simple built-in
> conveniences that any newbie can profit from.

But you _can't_ profit from these conveniences, at least not the ?
character. It's just garbage put in there for some others to interpret,
meaningless to the interpreter. So it _always_ boils down to
editor-support.

Now obviously _one_ scheme supported by all editors would be a great thing -
so one could argue that a well-defined PEP that suggests a certain comment
style that allows for your desired functionality would be a good thing.

Diez



From claudio.grondi at freenet.de  Wed Mar  7 17:48:36 2007
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Wed, 07 Mar 2007 23:48:36 +0100
Subject: image processing
In-Reply-To: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>
References: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>
Message-ID: <esnfg2$15k$1@newsreader3.netcologne.de>

edurand wrote:
> Hi,
> 
> We are are pleased to announce the version 3.0 of the image processing
> library 'Filters'.
> You can use it in Python, and we have provided tutorials and samples
> in Python, with for exemple conversion from/to PIL image format.
> 
> Have a look at : http://filters.sourceforge.net/
> 
> it's open source of course
> 
> regards
> edurand
> 
In the context of this posting it would be interesting for me (and maybe 
also to others) to know:

What was the actual motivation behind the project?

What are other image processing packages missing, that is worth to be 
covered by a separate package?

(i.e. I checked http://filters.sourceforge.net/ out, but haven't yet 
found the mentioned questions answered )

Claudio Grondi


From luismgz at gmail.com  Sat Mar 31 17:26:13 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 31 Mar 2007 14:26:13 -0700
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
In-Reply-To: <576vhbF2ca1guU1@mid.individual.net>
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
Message-ID: <1175376373.241744.6220@y80g2000hsf.googlegroups.com>

On Mar 31, 8:38 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Mark Dufour wrote:
> > Shed Skin allows for translation of pure (unmodified), implicitly
> > statically typed Python programs into optimized C++, and hence,
>
>                                                            ^^^^^> highly optimized machine language.
>
>   ^^^^^^^^^^^^^^^^
>
> Wow, I bet all C++ compiler manufacturers would want you to work for
> them.
>
> Regards,
>
> Bj?rn
>
> --
> BOFH excuse #23:
>
> improperly oriented keyboard


Mark has been doing an heroic job so far.
Shedskin is an impressive piece of software and, if pypy hadn't been
started some time ago, it should have gotten more attention from the
community.
I think he should be taken very seriously.

He is the first programmer I know who actually released working
code(and a lot of it) of a project that actually manages to speed up
python by a large margin, by means of advanced type inference
techniques.
Other people, in the past, have attended conferences and made
spectacular announcements of projects that could speed up python by
60x or more, but never ever released any code.

Mark has been working quietly for a long time, and his works deserves
a lot of credit (and hopefully, some help).






From irstas at gmail.com  Tue Mar 27 06:37:19 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 27 Mar 2007 03:37:19 -0700
Subject: SPE question
In-Reply-To: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
References: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
Message-ID: <1174991839.417993.295570@y80g2000hsf.googlegroups.com>

On Mar 27, 11:39 am, "alain" <alainpo... at yahoo.fr> wrote:
> Hi,
>
> Could someone tell me how to uninstall SPE under windows?
>
> Alain

Dunno about SPE, but most Python modules I've installed can
be uninstalled from control panel/add remove programs.



From siona at chiark.greenend.org.uk  Tue Mar  6 12:11:59 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 06 Mar 2007 17:11:59 +0000 (GMT)
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
Message-ID: <RCD*3G2Er@news.chiark.greenend.org.uk>

Steven D'Aprano  <steve at REMOVEME.cybersource.com.au> wrote:
>I have a PC behind a firewall, and I'm trying to programmatically
>determine the IP address visible from outside the firewall.
>  [ ... ]
>Can anyone help me fix that code snippet, or suggest another (better) way
>to get the externally visible IP address?

Depending on your circumstances, it may be possible to just ask the
firewall. You'll probably need some kind of administrator login, and
may well have to parse HTML if it's only got a web interface, but it
does mean that you don't have to connect to anything in the outside
world.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From bearophileHUGS at lycos.com  Thu Mar 29 09:03:32 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 29 Mar 2007 06:03:32 -0700
Subject: Modal value of an array
In-Reply-To: <1hvpovd.1anin2by4gjl1N%aleax@mac.com>
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
	<1hvpovd.1anin2by4gjl1N%aleax@mac.com>
Message-ID: <1175173412.350227.105180@y66g2000hsf.googlegroups.com>

Alex Martelli:
> >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> >>> max(foo, key=foo.count)

It's a very nice solution, the shortest too. But I think it's better
to develop your own well tested and efficient stats module (and there
is one already done that can be found around) and import it when you
need functions, instead of using similar onliners or re-writing code.
As you know your solution becomes rather slow if the list is quite
long, and it works with lists only.
This uses more memory but it's probably much faster for longer
interables:

from collections import defaultdict

def mode(seq):
    freqs = defaultdict(int)
    for el in seq:
        freqs[el] += 1
    return max(freqs.itervalues())


Generally you may want to know what's the mode element(s) too:

def mode2(seq):
    freqs = defaultdict(int)
    for el in seq:
        freqs[el] += 1
    maxfreq = max(freqs.itervalues())
    mode_els = [el for el,f in freqs.iteritems() if f == maxfreq]
    return maxfreq, mode_els

foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
print mode(foo)
print mode2(foo)

Bye,
bearophile



From garrickp at gmail.com  Wed Mar  7 17:04:25 2007
From: garrickp at gmail.com (garrickp at gmail.com)
Date: 7 Mar 2007 14:04:25 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <1173304097.821562.75060@t69g2000cwt.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
Message-ID: <1173305065.041154.41660@j27g2000cwj.googlegroups.com>

On Mar 7, 2:48 pm, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
>
> I'm not really thinking about this situation so let me clarify. Here
> is a simple concrete example, taking the following for the functions
> a,b,c I mention in my original post.
>   - a=int
>   - b=float
>   - c=complex
>   - x is a string
> This means I want to convert x to an int if possible, otherwise a
> float, otherwise a complex, otherwise raise CantDoIt.
>
> I can do:
>
> for f in int, float, complex:
>     try:
>         return f(x)
>     except ValueError:
>         continue
> raise CantDoIt
>
> But if the three things I want to do are not callable objects but
> chunks of code this method is awkward because you have to create
> functions simply in order to be able to loop over them (this is whay I
> was talking about 'abusing loop constructs').  Besides I am not happy
> with the other two idioms I can think of.
>
> --
> Arnaud

Wouldn't it be easier to do:

if isinstance(x, int):
    # do something
elif isinstance(x, float)t:
    # do something
elif isinstance(x, complex):
    # do something
else:
    raise CantDoIt

or,

i = [int, float, complex]
for f in i:
    if isinstance(x, f):
        return x
else:
    raise CantDoIt



From grue at mail.ru  Fri Mar 30 04:21:19 2007
From: grue at mail.ru (Timofei Shatrov)
Date: Fri, 30 Mar 2007 08:21:19 GMT
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<Fo2Ph.12350$Um6.9109@newssvr12.news.prodigy.net>
Message-ID: <460cc83a.2652073@news.readfreenews.net>

On Fri, 30 Mar 2007 06:48:05 GMT, "Mike Schilling" <mscottschilling at hotmail.com>
tried to confuse everyone with this message:

>Xah Lee wrote:
>
>> So, a simple code like this in normal languages:

>> becomes in Java:
>>
>>
>
>Only when written by someone almost entirely ignorant of Java. 
>

Which is the state most people want to be in...

-- 
|Don't believe this - you're not worthless              ,gr---------.ru
|It's us against millions and we can't take them all... |  ue     il   |
|But we can take them on!                               |     @ma      |
|                       (A Wilhelm Scream - The Rip)    |______________|


From davelist at mac.com  Thu Mar  8 16:57:15 2007
From: davelist at mac.com (davelist at mac.com)
Date: Thu, 8 Mar 2007 16:57:15 -0500
Subject: convert time string in UTC to time in local time
Message-ID: <227BFC33-1921-4E9E-A483-DF16240C1BBA@mac.com>

I'm guessing there is an easy way to do this but I keep going around  
in circles in the documentation.

I have a time stamp that looks like this (corresponding to UTC time):

start_time = '2007-03-13T15:00:00Z'

I want to convert it to my local time.

start_time = time.mktime(time.strptime(start_time, '%Y-%m-%dT%H:%M: 
00Z'))
start_time -= time.timezone

This was working fine now, but if I do it for a date next week (such  
as March 13th in the above example), it breaks because my local time  
moves to daylight savings time this weekend. So my time is now off by  
an hour. I'm guessing if I try this next week it will work okay  
because time.timezone will be give a different value next week - is  
that correct?

Is there a direct way to convert that timestamp in UTC to a local  
time stamp that will always work?

TIA,
Dave



From laurent.pointal at wanadoo.fr  Fri Mar 30 17:44:54 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Fri, 30 Mar 2007 23:44:54 +0200
Subject: Game programming for kids: looking for open source 2D game
	development kit
References: <euid24$ugc$1@online.de> <euig08$fv3$2@news2.u-psud.fr>
	<460d4f36$0$10784$c3e8da3@news.astraweb.com>
Message-ID: <460d83ae$0$27386$ba4acef3@news.orange.fr>

John Salerno wrote:

> Laurent Pointal wrote:
> 
>> With Python:
>> * pygame + build your drag'n drop features
>> * if you like 3D, vpython.
>> 
>> 
>> http://www.pygame.org/
>> http://www.vpython.org/
> 
> Wow, vpython looks pretty  need. I'm messing around with it right now
> and reading the docs. But I can't find something...do you know how to
> clear the contents of the current scene? 

No, I know about vpython existence, I tried demos but haven't used it (no
need).

You may use the development lists for such questions.

http://sourceforge.net/mail/?group_id=6013

A+

Laurent.



From aleax at mac.com  Thu Mar 15 23:08:47 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 20:08:47 -0700
Subject: Python shell on mac os x
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
Message-ID: <1hv1966.1poigs11f692njN%aleax@mac.com>

Bert Heymans <bert.heymans at gmail.com> wrote:

> Hi!
> 
> I'm using iTerm on the mac the keymapping isn't right. On Linux and
> Windows it's really nice to be able to hit up to get the previous
> command. Does anyone know a way to get the Pyhton shell to work like
> on other systems, I always get this when I hit the direction keys:
> 
> >>> ^[OA^[OC^[OD
> 
> I've been looking for the correct mappings but can't find a proper
> reference online nor what the Python shell expects. Any help would be
> greatly appreciated! Hints/suggestions on keywords to use in a search
> on Google are always welcome :) I don't know where to begin looking
> for this kind of information.

The Python 2.3.5 bundled with MacOSX doesn't come with readline.
Download 2.5 (or if you must 2.4) for the Mac from www.python.org and
live happily ever after.

E.g. (I'm hitting an up-arrow the 2nd time, then control-D next time):

brain:~ alex$ python2.3
Python 2.3.5 (#1, Jan 13 2006, 20:13:11) 
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 2+2
4
>>> ^[[A
  File "<stdin>", line 1
    ^
SyntaxError: invalid syntax
>>> ^D
brain:~ alex$ python2.4
Python 2.4.3 (#1, Apr  7 2006, 10:54:33) 
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 2+2
4
>>> 2+2
4
>>> 
brain:~ alex$ 


Alex


From tew24 at spam.ac.uk  Wed Mar 21 13:25:35 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 17:25:35 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
	<mailman.5403.1174493865.32031.python-list@python.org>
Message-ID: <etrpqf$t8g$3@gemini.csx.cam.ac.uk>

skip at pobox.com wrote:
> If your program's behavior is:
> 
>     * allocate a list of 1e7 ints
>     * delete that list
> 
> how does the Python interpreter know your next bit of execution won't be
> to repeat the allocation?

It doesn't know, but if the program runs for a while without repeating it,
it's a fair bet that it won't mind waiting the next time it does a big
allocation.  How long 'a while' is would obviously be open to debate.

> In addition, checking to see that an arena in 
> the free list can be freed is itself not a free operation.
> (snip thorough explanation)

Yes, that's a good point.  It looks like the list is designed for speedy
re-use of the memory it points to, which seems like a good choice.  I quite
agree that it should hang on to *some* memory, and perhaps my artificial
situation has shown this as a problem when it wouldn't cause any issues for
real programs.  I can't help thinking that there are some situations where
you need a lot of memory for a short time though, and it would be nice to
be able to use it briefly and then hand most of it back.  Still, I see the
practical difficulties with doing this.

-- 
I'm at CAMbridge, not SPAMbridge


From deets at nospam.web.de  Tue Mar 20 12:27:21 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 Mar 2007 17:27:21 +0100
Subject: making objects with individual attributes!
References: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>
Message-ID: <56agb9F288cqgU1@mid.uni-berlin.de>

Alejandro wrote:

> I have created a class:
> 
> class document:
> 
>     titre = ''
>     haveWords = set()
> 
>     def __init__(self, string):
> 
>         self.titre = string
> 
> #########
> 
> doc1 = document('doc1')
> doc2 = document('doc2')
> 
> doc1.haveWords.add(1)
> doc2.haveWords.add(2)
> 
> 
> print doc1.haveWords
> 
> # i get set([1, 2])
> 
> 
> doc1 and doc are sharing attribute haveWords!
> Why ??? there's a way to assign every objetc "document" a different
> "set"

Yes, by using instance-attributes instead of class-attributes, as you do.

Btw, it's common to name classes in python with a capital first letter, and
you should use new-style classes, which means you need to subclass it from
object:

class Document(object):

    def __init__(self):
        self.haveWords = set()


Diez


From stargaming at gmail.com  Tue Mar 20 15:30:28 2007
From: stargaming at gmail.com (Stargaming)
Date: Tue, 20 Mar 2007 20:30:28 +0100
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <1174415242.455972.51400@d57g2000hsg.googlegroups.com>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
Message-ID: <etpcon$1g8r$1@ulysses.news.tiscali.de>

rh0dium schrieb:
>>Python usually installs so the latest version gets linked as
>>/usr/bin/python. HTere's no need to bind your scripts to a particular
>>version.
>>
>>regards
> 
> 
> True - but that entirely depends on your path.  Example:
> 
> Redhat (RHEL3) ships with python2.3 in /usr/bin
> Adding an 2.5 version to /usr/local/bin
> 
> set PATH=/usr/local/bin:/usr/bin
> 
> "python" - will use 2.5
> 
> Conversely if you:
> set PATH=/usr/bin:/usr/local/bin
> 
> "python" - will use 2.3
> 
> but if I wanted to ensure I was using 2.5 I would simply type
> python2.5  I want to ensure that the python version I am using is at
> lease 2.4
> 
> 
> 

#!/usr/bin/env python

and

from sys import version_info
if version_info[0] < 2 or version_info[1] < 4:
     raise RuntimeError("You need at least python2.4 to run this script")

IMO you shouldn't struggle with it too hard. If the user's python 
version is not appropriate, don't hack its interpreter mechanism to do 
the work you need. Anyways, you should not check for specific python 
versions but for modules/APIs/builtins whatever and *then* you may raise 
an exception pointing the user to the fact that is python version does 
not fit your needs.

HTH,
Stargaming


From nagle at animats.com  Thu Mar 29 14:34:56 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 29 Mar 2007 18:34:56 GMT
Subject: with timeout(...):
In-Reply-To: <56prsrF2am4a1U1@mid.uni-berlin.de>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
Message-ID: <kFTOh.1088$5e2.392@newssvr11.news.prodigy.net>

Diez B. Roggisch wrote:
> Nick Craig-Wood wrote:
> 
> 
>>Did anyone write a contextmanager implementing a timeout for
>>python2.5?
>>
>>And have it work reliably and in a cross platform way!
> 
> Cross platform isn't the issue here - reliability though is. To put it
> simple: can't be done that way. You could of course add a timer to the
> python bytecode core, that would "jump back" to a stored savepoint or
> something like that.

     Early versions of Scheme had a neat solution to this problem.
You could run a function with a limited amount of "fuel".  When the
"fuel" ran out, the call returned with a closure.  You could
run the closure again and pick up from where the function had been
interrupted, or just discard the closure.

     So there's conceptually a clean way to do this.  It's probably
not worth having in Python, but there is an approach that will work.

     LISP-type systems tend to be more suitable for this sort of thing.
Traditionally, LISP had the concept of a "break", where
execution could stop and the programmer (never the end user) could
interact with the computation in progress.

				John Nagle


From nagle at animats.com  Mon Mar 12 20:29:39 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 13 Mar 2007 00:29:39 GMT
Subject: File locking
In-Reply-To: <pan.2007.03.12.18.44.57.137889@gmx.net>
References: <1173722982.696539.24360@64g2000cwx.googlegroups.com>
	<pan.2007.03.12.18.44.57.137889@gmx.net>
Message-ID: <TfmJh.3286$uo3.3247@newssvr14.news.prodigy.net>

Marc 'BlackJack' Rintsch wrote:
> In <1173722982.696539.24360 at 64g2000cwx.googlegroups.com>, Dr. Who wrote:
> 
> 
>>Please let me know if I'm missing something since they seem like
>>normal file operations that I would hope Python would abstract away.
> 
> 
> I don't think of them as "normal" operations.  They are "extra" stuff that
> is not only dependent on the operating system but also on the file system
> in use.

    It's a UNIX legacy problem.  UNIX historically was very weak
at interprocess communication and locking, and while today, most
UNIX-like systems have some kind of add-on for those functions,
they were never really standardized.

    But see

http://www.thinkspot.net/scripts/posixmutexfile.py
http://www.thinkspot.net/scripts/mutexfile.py
http://www.thinkspot.net/scripts/winmutexfile.py

for an attempt to deal with this probl;em in a portable way.
The code is somewhat dated, but it's on the right track.

				John Nagle


From uri at stemsystems.com  Thu Mar 29 15:00:17 2007
From: uri at stemsystems.com (Uri Guttman)
Date: Thu, 29 Mar 2007 14:00:17 -0500
Subject: Any "consumer review generators" available?
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
Message-ID: <x7ejn7dge6.fsf@mail.sysarch.com>

>>>>> "a" == aralsky  <aralsky at aol.com> writes:

  a> I am looking for a fake consumer review generator that could
  a> generate realistic looking reviews for any products, kind of like
  a> on amazon.com but generated by Artificial Intelligence. Is there a
  a> package available in your favorite programing language... thx alan

it's called a human being. and hope you find some with ethics which you
don't seem to have.

uri

-- 
Uri Guttman  ------  uri at stemsystems.com  -------- http://www.stemsystems.com
--Perl Consulting, Stem Development, Systems Architecture, Design and Coding-
Search or Offer Perl Jobs  ----------------------------  http://jobs.perl.org


From PrikrylP at skil.cz  Thu Mar 15 02:57:08 2007
From: PrikrylP at skil.cz (Petr Prikryl)
Date: Thu, 15 Mar 2007 07:57:08 +0100
Subject: Sorry (was Re: Cteni unicode retezcu ze souboru UTF-8 s BOM?)
Message-ID: <E8AE1CAFC84D634A9CCC887B8AAB15EC1F24CB@skil01.skil.mistni>

Sorry for the mess,

The message should have been sent to the Czech
Python mailing list. My fault.

pepr

"Petr Prikryl" wrote...
> Ahoj v?eci,
> Tak n?jak prakticky poprv? se dost?v?m k tomu, 
> jak p?e??st unicode ?et?zce ze souboru, kter?
> je ulo?en ve form?tu UTF-8 se signaturou
> na za??tku (BOM). N?jak se mi neda??.


From http  Tue Mar 13 16:42:53 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 12:42:53 -0800
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
	<1173812047.578137.223430@j27g2000cwj.googlegroups.com>
	<7xmz2hndh0.fsf@ruckus.brouhaha.com>
	<45f70709$0$5892$426a34cc@news.free.fr>
Message-ID: <7xslc898oi.fsf@ruckus.brouhaha.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> writes:
> I don't know if I qualify as a Python traditionalist, but I'm using
> Python since the 1.5.2 days, and I usually favor list comps or
> generator expressions over old-style loops when it comes to this kind
> of operations.

I like genexps when they're nested inside other expressions so they're
consumed as part of the evaluation of the outer expression.  They're a
bit scary when the genexp-created iterator is saved in a variable.

Listcomps are different, they allocate storage for the entire list, so
they're just syntax sugar for a loop.  They have an annoying
misfeature of their

> Python has had functions as first class objects and
> (quite-limited-but) anonymous functions, map(), filter() and reduce()
> as builtin funcs at least since 1.5.2 (quite some years ago).

True, though no iterators so you couldn't easily use those functions
on lazily-evaluated streams like you can now.

> >  Iterators like that are a new Python feature
> List comps are not that new (2.0 or 2.1 ?):
> print "\n".join([contact for name, contact in contacts.items() \
>                   if search.match(name)])

Well you could do it that way but it allocates the entire filtered
list in memory.  In this example "\n".join() also builds up a string
in memory, but you could do something different, like run the sequence
through another filter or print out one element at a time, in which
case lazy evaluation can be important (imagine that contacts.iteritems
chugs through a billion row table in an SQL database).

> > It's usually safest to create and consume them in the same
> > place, e.g. creating some sequence and passing it through map, filter, etc.
> Safest ? Why so ?

Just that things can get confusing if you're consuming the iterator in
more than one place.  It can get to be like those old languages where
you had to do your own storage management ;-).


From michele.simionato at gmail.com  Mon Mar 12 11:31:58 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Mar 2007 08:31:58 -0700
Subject: nonlinear interpolation
Message-ID: <1173713518.048703.227530@h3g2000cwc.googlegroups.com>

I want to interpolate a data distribution with a function depending on
various parameters; the function
can be a Gaussian, a Breit-Wigner, a custom function. Where should I
look? I am getting lost
between matplotlib, numeric, numpy, scientific python, scipy, etc.
etc.
Any pointer would be well received :)

      Michele Simionato



From codecraig at gmail.com  Wed Mar 14 07:43:18 2007
From: codecraig at gmail.com (abcd)
Date: 14 Mar 2007 04:43:18 -0700
Subject: Quick Filter Dictionary
In-Reply-To: <1173871745.698892.189470@n76g2000hsh.googlegroups.com>
References: <1173871745.698892.189470@n76g2000hsh.googlegroups.com>
Message-ID: <1173872598.381107.182520@y66g2000hsf.googlegroups.com>

On Mar 14, 7:29 am, "abcd" <codecr... at gmail.com> wrote:
> Hi,
>    I have a dictionary which may contain various keys/values, however,
> it will always contain 'name' and 'age' keys.
>
>    This dictionary is kept inside a class, such as....
>
>     class Person:
>         def __init__(self, name, age):
>             self.data = {'name' : name, 'age' : age}
>
>         def getData(self, includeNameAge=False):
>             if includeNameAge: return self.data
>             tmp = <shallow or deep copy of 'data'>
>             del tmp['name']
>             del tmp['age']
>             return tmp
>
>        The getdata method should return the data stored for the
> person, however, it should be able to return the data excluding the
> 'name' and 'age'.  Any suggestions on how to best implement this?
> Keep in mind this sample code is meant to be an example, I realize
> that a person would probably always want the name and age returned.
>
> thanks


I guess one solution might be....

def getData(self, includeNameAge=False):
    if includeNameAge: return self.data
    return dict(filter(lambda item: item[0] not in ('name', 'age'),
self.data.items()))

any other suggestions, improvements?



From grflanagan at yahoo.co.uk  Fri Mar  9 10:35:35 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 9 Mar 2007 07:35:35 -0800
Subject: number generator
In-Reply-To: <1173453432.893222.308610@j27g2000cwj.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
Message-ID: <1173454535.382260.33930@j27g2000cwj.googlegroups.com>

On Mar 9, 4:17 pm, "cesco" <fd.calabr... at gmail.com> wrote:
> On Mar 9, 3:51 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>
> > "cesco" <fd.calabr... at gmail.com> writes:
> > > I have to generate a list of N random numbers (integer) whose sum is
> > > equal to M. If, for example, I have to generate 5 random numbers whose
> > > sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> > > simple pattern or function in Python to accomplish that?
>
> > Erm, yes, lots of ways, there are probably further constraints on the
> > problem, such as the size of the integers, how the lists are supposed
> > to be distributed, etc.  Can you be more specific?  Is this for an
> > application?  If it's a homework problem, that's fine, but it's better
> > in that case for respondents to suggest hints rather than full solutions.
>
> Given two positive integers, N and M with N < M, I have to generate N
> positive integers such that sum(N)=M. No more constraints.
>
> Thanks again
> Francesco

Suppose you have a fixed telegraph pole at N and a fixed telgraph pole
at M, and you're given 5 more telegraph poles...



From martin.laloux at gmail.com  Fri Mar 16 04:53:00 2007
From: martin.laloux at gmail.com (martin.laloux at gmail.com)
Date: 16 Mar 2007 01:53:00 -0700
Subject: Python shell on mac os x
In-Reply-To: <1hv1966.1poigs11f692njN%aleax@mac.com>
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
	<1hv1966.1poigs11f692njN%aleax@mac.com>
Message-ID: <1174035180.781564.25130@n59g2000hsh.googlegroups.com>

or go to
http://pythonmac.org/packages/
 and you have python 2.5 or python 2.4.4 with readline support



From alain.walter at thalesgroup.com  Wed Mar  7 05:54:26 2007
From: alain.walter at thalesgroup.com (awalter1)
Date: 7 Mar 2007 02:54:26 -0800
Subject: thread and portability Unix/Linux
Message-ID: <1173264866.645389.268640@v33g2000cwv.googlegroups.com>

Hi,
I have a Python application that runs under HPUX 11.11 (then unix). It
uses threads :
from threading import Thread
# Class Main
class RunComponent(Thread):

My application should run under Linux (red hat 3 ou 4) and I read that
differences exist between the implementation of threads : on HPUX
11.11 there is CMA (ou DCE) threads and on Linux POSIX thread. Do you
think that my Python application should be modified or may be such
differences are hidden by the python interpreter ?
In other terms, do I get some risks on this particular aspect by
porting my application ?
Thanks a lot

PS: If you are aware of other risk of porting, I am interested too.



From n00m at narod.ru  Fri Mar 16 02:41:58 2007
From: n00m at narod.ru (n00m)
Date: 15 Mar 2007 23:41:58 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174026484.499259.300720@o5g2000hsb.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<1174026484.499259.300720@o5g2000hsb.googlegroups.com>
Message-ID: <1174027318.528444.314250@y66g2000hsf.googlegroups.com>

For those who interested, my test input files:

http://rapidshare.com/files/21267938/m1000.txt

http://rapidshare.com/files/21268386/m4000.txt



From mailmaverick666 at gmail.com  Fri Mar 23 07:32:06 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Fri, 23 Mar 2007 17:02:06 +0530
Subject: Create new processes over telnet in XP
In-Reply-To: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
Message-ID: <180b672e0703230432x5606a095q500450beb71a4080@mail.gmail.com>

You could use pexpect module.
Open a telnet session
Then run the script in nohup mode
It's assumed that the binary is available over there

On 23 Mar 2007 03:47:14 -0700, Godzilla <godzillaismad at gmail.com> wrote:
>
> Hello,
>
> How do you create/spawn new processes in XP over telnet using python?
> I.e. I would like to create a new process and have it running in the
> background... when I terminate the telnet connection, I would what the
> spawned processes to keep running until I shut it off...
>
> I got the os.popen method to spawn a new process running in the
> backgroun, but not over telnet... tried os.popen[2, 3, 4] and also
> subprocesses.popen without any luck...
>
> Any help will be appreciated... thankyou.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From wgwigw at gmail.com  Thu Mar 22 20:49:01 2007
From: wgwigw at gmail.com (momobear)
Date: 22 Mar 2007 17:49:01 -0700
Subject: how can I invoke a Java code?
Message-ID: <1174610940.971724.206900@l75g2000hse.googlegroups.com>

A friend of my write a Java program, and I want use it in my python
program as a module. I searched the topic in Google and find maybe the
better way is use GCJ to compile it. Is there any other way for me?
the simple and speediness choice the better. thanks.



From luismgz at gmail.com  Sat Mar 31 21:49:11 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 31 Mar 2007 18:49:11 -0700
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
In-Reply-To: <578gbhF2b61kkU1@mid.individual.net>
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
	<578gbhF2b61kkU1@mid.individual.net>
Message-ID: <1175392151.802791.165670@y80g2000hsf.googlegroups.com>

On Mar 31, 10:31 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Luis M. Gonz?lez wrote:
> > I think he should be taken very seriously.
>
> Agreed.
>
> Okay, it seems focusing a discussion on one single point is
> difficult for many people. Next time I'll be mind-bogglingly clear
> that even the last one understands after reading it one time ...
>
> Regards,
>
> Bj?rn
>
> Fup2 p
>
> --
> BOFH excuse #46:
>
> waste water tank overflowed onto computer


Bjoern,

I understood what you said. It's just that it seemed that you were
mocking at the poster's message.
I apologize if that wasn't your intention.

Luis



From michele.simionato at gmail.com  Mon Mar 12 04:02:57 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Mar 2007 01:02:57 -0700
Subject: Putting Metaclasses to Work
In-Reply-To: <fWXIh.237$y56.72@trnddc07>
References: <fWXIh.237$y56.72@trnddc07>
Message-ID: <1173686577.845617.227820@j27g2000cwj.googlegroups.com>

On Mar 11, 7:31 pm, "Alan Isaac" <ais... at american.edu> wrote:
> Forman's book is out of print.
> Is there a good substitute?
>
> Thanks,
> Alan Isaac

The book is about a non-standard implementation of C++ featuring
metaclasses.
It it not that relevant if you are interested in metaclasses in
Python.
You can find lots of info about metaclasses in the Python Wiki. For
instance,
you can look at http://www.python.org/pycon/dc2004/papers/24/metaclasses-pycon.pdf
which has lots of examples.
If you insist in wanting the book, you should look for used books.
This is the
way I bought it from Amazon 5 years ago (dunno if it is still
available now, but
you never know).

    Michele Simionato



From shatranjchess at gmail.com  Thu Mar 15 15:58:05 2007
From: shatranjchess at gmail.com (shatranjchess at gmail.com)
Date: 15 Mar 2007 12:58:05 -0700
Subject: New Chess Module
Message-ID: <1173988685.077287.45240@l75g2000hse.googlegroups.com>

I'm releasing a new python chess module called shatranj.
You can get it from www.employees.org/~stannous/shatranj
until I move the project to sourceforge or some other place.

It's a text based (bitboard) chess engine that implements
an alphabeta search with iterative deepening.
It also has a small opening book and stores most of
its information in dictionaries (hash tables).  So for
a python module, it should be fast.

It currently has a very simple evaluation
function so don't expect strong play.  My goal was to
implement a complete program using 64 bit numbers
(bitboards) as the main data structures...sacrificing
speed for code clarity.  I'm hoping that non-programmers
interested in AI or advanced chess players will be able
to pick it up and add some intelligence to it.  Being
written in Python, it's not blazingly fast...but Kasparov
doesn't even look at 2k nodes per second, does he? ;-)

Some things I could use some help with: interface for
xboard and winboard not to mention a better
evaluation function.

(comments and suggestions are welcome...
please email shatranjchess at gmail dot com)

Here's a small interactive session of how it works:

------------------
>>> from shatranj import *
...reading startup data
...total time to read data 0.0774528980255
...found opening book shatranj-book.bin with 37848 positions
>>> position = Position("r1bqk2r/pppp1ppp/2n5/5N2/2B1n3/8/PPP1QPPP/R1B1K2R")
>>> all_pieces = position.piece_bb["b_occupied"] | position.piece_bb["w_occupied"]
>>> other_pieces = position.piece_bb["b_occupied"]
>>> from_square = c4
>>> wtm = 1
>>> mask = position.pinned(from_square,wtm)
>>> ne_pieces = diag_mask_ne[from_square] & all_pieces
>>> nw_pieces = diag_mask_nw[from_square] & all_pieces
>>> moves = ((diag_attacks_ne[from_square][ne_pieces] & other_pieces) | \
...          (diag_attacks_ne[from_square][ne_pieces] & ~all_pieces)
| \
...          (diag_attacks_nw[from_square][nw_pieces] & other_pieces)
| \
...          (diag_attacks_nw[from_square][nw_pieces] & ~all_pieces))
& mask
>>>
>>> moves
1275777090846720L
>>>
>>> tobase(moves,2)
'100100010000101000000000000010100000000000000000000'
>>> display(moves)

    +---+---+---+---+---+---+---+---+
  8 |   | . |   | . |   | . |   | . |
    +---+---+---+---+---+---+---+---+
  7 | . |   | . |   | . | 1 | . |   |
    +---+---+---+---+---+---+---+---+
  6 | 1 | . |   | . | 1 | . |   | . |
    +---+---+---+---+---+---+---+---+
  5 | . | 1 | . | 1 | . |   | . |   |
    +---+---+---+---+---+---+---+---+
  4 |   | . |   | . |   | . |   | . |
    +---+---+---+---+---+---+---+---+
  3 | . | 1 | . | 1 | . |   | . |   |
    +---+---+---+---+---+---+---+---+
  2 |   | . |   | . |   | . |   | . |
    +---+---+---+---+---+---+---+---+
  1 | . |   | . |   | . |   | . |   |
    +---+---+---+---+---+---+---+---+
      a   b   c   d   e   f   g   h

>>> move_list = position.generate_moves(wtm)
>>> moves,san_moves = position.get_move_list(move_list)
>>> san_moves.values()
['Rg1', 'O-O', 'f3', 'a3', 'Rb1', 'f4', 'Ba6', 'Qe3', 'Bh6', 'Bd3',
 'Qg4', 'Ng3', 'Ne7', 'Be6', 'Nxg7', 'Qxe4', 'Ne3', 'b4', 'b3', 'Be3',
'Bg5', 'g3', 'Kf1', 'Rf1', 'Nh6', 'a4', 'Nh4', 'Qh5', 'Kd1', 'h4',
'h3',
'c3', 'Bxf7', 'Nd6', 'Bb5', 'Nd4', 'Qf3', 'g4', 'Qf1', 'Bb3', 'Qd1',
'Qd3', 'Qd2', 'Bd5', 'Bd2', 'Bf4']
>>>
>>> # now play a game!
>>> play()
Shatranj version 1.0
         g: switch sides     m: show legal moves
         n: new game         l: list game record
         d: display board    b: show book moves
        sd: change search depth (2-16) default=5
         q: quit

Shatranj: d

    +---+---+---+---+---+---+---+---+
  8 | r | n | b | q | k | b | n | r |
    +---+---+---+---+---+---+---+---+
  7 | p | p | p | p | p | p | p | p |
    +---+---+---+---+---+---+---+---+
  6 |   | . |   | . |   | . |   | . |
    +---+---+---+---+---+---+---+---+
  5 | . |   | . |   | . |   | . |   |
    +---+---+---+---+---+---+---+---+
  4 |   | . |   | . |   | . |   | . |
    +---+---+---+---+---+---+---+---+
  3 | . |   | . |   | . |   | . |   |
    +---+---+---+---+---+---+---+---+
  2 | P | P | P | P | P | P | P | P |
    +---+---+---+---+---+---+---+---+
  1 | R | N | B | Q | K | B | N | R |
    +---+---+---+---+---+---+---+---+
      a   b   c   d   e   f   g   h



Shatranj:
-----------------------------------

Enjoy,
Sam



From inq1ltd at verizon.net  Tue Mar 20 22:31:00 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Tue, 20 Mar 2007 22:31:00 -0400
Subject: mysterious unicode
In-Reply-To: <1174439860.3251.30.camel@localhost.localdomain>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<200703202026.34160.inq1ltd@verizon.net>
	<1174439860.3251.30.camel@localhost.localdomain>
Message-ID: <200703202231.00497.inq1ltd@verizon.net>

On Tuesday 20 March 2007 21:17, Carsten Haese 
wrote:
> On Tue, 2007-03-20 at 20:26 -0400, jim-on-linux 
wrote:
> > I have been getting the same thing using
> > SQLite3 when extracting data fron an SQLite3
> > database.
>
> Many APIs that exchange data choose to exchange
> text in Unicode because that eliminates
> encoding uncertainty. Whether an API uses
> Unicode would probably be noted somewhere in
> its documentation.
>
> >  I take the database info which is in a list
> > and do
> >
> > name = str.record[0]
>
> You probably mean str(record[0]) .

Yes, 


>
> > rather than
> > name = record[0]
> >
> > So far, I havn't had any problems.
> > For some reason the unicode u is removed.
> > I havn't wanted to spend the time to figure
> > out why.
>
> As a software engineer, I'd get worried if I
> didn't know why the code I wrote works. Maybe
> that's just me.

I don't disagree, but sometime depending on the 
situation, time to investigate is a luxury.
However, 
( If you don't have the time to do it right the 
first time when will you have the time to fix 
it.)

>
> Unicode is not rocket science. I suggest you
> read http://www.amk.ca/python/howto/unicode to
> demystify what Unicode objects are and do.
>
> With str(), you're asking the Unicode object
> for its byte string interpretation, which
> causes the Unicode object to give you its
> encoding in the system default encoding. The
> default encoding is normally ascii. That can be
> tweaked for your particular Python
> installation, but if you need an encoding other
> than ascii it's recommended that you explicitly
> encode and decode from and to Unicode, lest you
> risk writing non-portable code.
>
> Using str() coercion of Unicode objects will
> work well enough until you run into a string
> that contains characters that can't be
> represented in the default encoding. 
Right,
even though None or null are not strings they are 
common enough to cause a problem.
Try to run a loop through a list with None  or 
null in it. 
Example,
x = str(list[2]) 
when list[2] = null or None, problems.  
Easy to fix but more work.

I'll check the web site out.

Thanks for the update,
Jim-on-linux

> Once that 
> happens, you're better off explicitly encoding
> the Unicode object into a well-defined encoding
> on input, or, even better, just work with
> Unicode objects internally and only encode to
> byte strings when absolutely necessary, such as
> when outputting to a file or to the console.
>
> Hope this helps,
>
> Carsten.


From sonmez_programming at nerdshack.com  Fri Mar 16 18:26:34 2007
From: sonmez_programming at nerdshack.com (=?UTF-8?B?U8O2bm1leiBLYXJ0YWw=?=)
Date: Sat, 17 Mar 2007 00:26:34 +0200
Subject: python global variable error
In-Reply-To: <f89a5eb80703161514g34a29943rb09e37b2f67354eb@mail.gmail.com>
References: <f89a5eb80703161313l72bd2eb8m364d6736e6bae79b@mail.gmail.com>	
	<45FB1414.7070203@nerdshack.com>
	<f89a5eb80703161514g34a29943rb09e37b2f67354eb@mail.gmail.com>
Message-ID: <45FB199A.6070504@nerdshack.com>

Then after defining clientsock, write a print statement as "print 
clientsock", see what it will print, None or a object?

S?nmez

ANIL KARADA? wrote:
> ok , arranged block.but program give error global name 'clientsock' is not
> defined " ,..
> 
> 2007/3/17, S?nmez Kartal <sonmez_programming at nerdshack.com>:
>>
>> Hi,
>>
>> You should check your script's indentation. Especially, last "while 1:"
>> block's.
>>
>> S?nmez
>>
>> ANIL KARADA? wrote:
>> > hi, i made a program in python but received global name  error. the
>> program
>> > code;
>> >  serverhost = '127.0.0.1'
>> >    serverport = 2000
>> >    BUFSIZ = 1024
>> >    addr = (serverhost,serverport)
>> >    if str(sys.argv).find("-s") == -1:
>> >    cs = socket(AF_INET, SOCK_STREAM,0)             # create a TCP 
>> socket
>> >    cs.connect(addr)
>> >    key=1
>> >    main()
>> >    else:
>> >        serversock = socket(AF_INET, SOCK_STREAM)    # create a TCP
>> socket
>> >        serversock.bind(addr)
>> >        serversock.listen(2)
>> >    key=2
>> >    print 'waiting for connection?'
>> >    while 1:
>> >            clientsock, addr = serversock.accept()
>> >        print '?connected from:', addr,clientsock
>> >        main()
>> >    serversock.close()
>> >
>> > what is difference cs and clientsock? i use cs in main() function or
>> > others,
>> > but  don't use clientsock not call from main() "  data =
>> > clientsock.recv(BUFSIZ)
>> > NameError: global name 'clientsock' is not defined "
>> >
>> > i am sorry, i  little know english
>> >
>>
>>



From greg at cosc.canterbury.ac.nz  Mon Mar 19 21:12:23 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 20 Mar 2007 13:12:23 +1200
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <mailman.5280.1174313171.32031.python-list@python.org>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>	<566vcfF27jlu4U1@mid.uni-berlin.de>	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5280.1174313171.32031.python-list@python.org>
Message-ID: <568qs8F27jr43U1@mid.individual.net>

Gabriel Genellina wrote:
> you may consider using a class 
> attribute as  a default value:
> 
> class Coffee:
> 
>     temp = 50

Be careful with that, though -- only use it for immutable
values. Doing that with a mutable object, such as a list,
will get you into trouble, since one object is being
shared between all instances.

--
Greg


From bwooster47 at gmail.com  Sat Mar  3 22:22:52 2007
From: bwooster47 at gmail.com (bwooster47 at gmail.com)
Date: 3 Mar 2007 19:22:52 -0800
Subject: distutils - script install check file existence before copy?
Message-ID: <1172978572.085942.40110@8g2000cwh.googlegroups.com>

Not sure if it is possible to do this - I know distutils has "force"
option that can be turned on/off for install_data, but is it possible
to do something somewhat complicated - have a data file named YYY,
need to copy it to share/script/YYY only if share/script/YYY does not
already exist, otherwise, need to copy YYY to share/script/YYY.new

Does anyone have any hints on how to go about doing this?



From projecktzero at yahoo.com  Wed Mar 14 14:16:46 2007
From: projecktzero at yahoo.com (projecktzero)
Date: 14 Mar 2007 11:16:46 -0700
Subject: Python & Oracle
In-Reply-To: <mailman.5095.1173895317.32031.python-list@python.org>
References: <mailman.5095.1173895317.32031.python-list@python.org>
Message-ID: <1173896206.673046.116760@n59g2000hsh.googlegroups.com>

On Mar 14, 12:01 pm, Facundo Batista <facu... at taniquetil.com.ar>
wrote:
> Hi! I need to connect to Oracle.
>
> I found this binding,
>
>  http://www.zope.org/Members/matt/dco2
>
> that is the recommended in the Python page.
>
> But that page seems a bit confuse to me. In the upper right corner says
> that the last release is PreRelease 1, from 2001-11-15.
>
> At the bottom, however, it says that 1.3 beta was released 2003-02-10,
> and is a development version (the last stable is 1.2, from 2002-10-02),
> four and a half years ago.
>
> The question is: is this connector the recommended one? it's aged
> because it's stable and no more changes are necessary, or it just dead?
> Works Ok?
>
> Thank you!! Regards,
>
> --
> .   Facundo
> .
> Blog:http://www.taniquetil.com.ar/plog/
> PyAr:http://www.python.org/ar/

If that doesn't work for you, try cx_oracle.



From jhefferon at smcvt.edu  Wed Mar 14 15:55:46 2007
From: jhefferon at smcvt.edu (Jim)
Date: 14 Mar 2007 12:55:46 -0700
Subject: Beginner question: difference between lists and tuples
In-Reply-To: <1173901598.431739.164380@o5g2000hsb.googlegroups.com>
References: <1173901598.431739.164380@o5g2000hsb.googlegroups.com>
Message-ID: <1173902146.165378.185130@o5g2000hsb.googlegroups.com>

On Mar 14, 3:46 pm, "KDawg44" <KDaw... at gmail.com> wrote:
> I am trying to learn python.  I am working through a tutorial on
> python.org.  I am trying to figure out how lists are different than
> tuples other than changing values at specific indices.
You can change lists but not tuples.  That has some advantages, as
when you append to a list.  But it has some disadvantages, as here
where I can't use a list as the key in a hash.

>>> d={[1,2]:'a'}
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: list objects are unhashable
>>> d={(1,2):'a'}
>>>

Jim




From tjreedy at udel.edu  Thu Mar 22 14:42:48 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 22 Mar 2007 14:42:48 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl><pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au><etscd5$g0g$1@news.onet.pl><7WjMh.318$YL5.80@newssvr29.news.prodigy.net><1hvcadb.134pbvp1y39wi3N%aleax@mac.com>	<DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com><ett5h2$1ll$1@sea.gmane.org>
	<ettg9s$t94$1@sea.gmane.org>
Message-ID: <etuin8$n6r$1@sea.gmane.org>


"Steve Holden" <steve at holdenweb.com> wrote in message 
news:ettg9s$t94$1 at sea.gmane.org...
| Terry Reedy wrote:
| > The assignment order is specified in the language reference.
|
| Where? I'm looking at
|
|   http://docs.python.org/ref/assignment.html
|
| right now.

The first line of the syntax grammar is:
assignment_stmt ::= (target_list "=")+ expression_list

The '+' means 1 or more 'target_list =' occurances.

The first line of the semantic explanation is:

" An assignment statement evaluates the expression list (...) and assigns 
the single resulting object to each of the target lists, from left to 
right."

Left to right.

And one can also check the byte code:
>>> dis.dis(compile('a=b=c', '', 'single'))
  1           0 LOAD_NAME                0 (c)
              3 DUP_TOP
              4 STORE_NAME               1 (a)
              7 STORE_NAME               2 (b)
             10 LOAD_CONST               0 (None)
             13 RETURN_VALUE

| as valid assignments, but I can't find the part where
|
| a = b = c
|
| is defined. Help me out here. It looks as though the real syntax should
| be something like
|
| assignment_stmt  ::=  (target_list "=")+ expression_list |
|                                 (target_list "=")+ assignment_stmt

You only need the first line (see above).

Terry Jan Reedy





From jordan.taylor2 at gmail.com  Thu Mar  8 12:46:17 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 8 Mar 2007 09:46:17 -0800
Subject: Reading a portion of a file
In-Reply-To: <1173372768.823896.32710@n33g2000cwc.googlegroups.com>
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
	<1173372768.823896.32710@n33g2000cwc.googlegroups.com>
Message-ID: <1173375977.853461.68240@v33g2000cwv.googlegroups.com>

On Mar 8, 11:52 am, "Rune Strand" <rune.str... at gmail.com> wrote:
> On Mar 8, 5:12 pm, cmfvulcan... at gmail.com wrote:
>
> > I am using a script with a single file containing all data in multiple
> > sections. Each section begins with "#VS:CMD:command:START" and ends
> > with "#VS:CMD:command:STOP". There is a blank line in between each
> > section. I'm looking for the best way to grab one section at a time.
> > Will I have to read the entire file to a string and parse it further
> > or is it possible to grab the section directly when doing a read? I'm
> > guessing regex is the best possible way. Any help is greatly
> > appreciated.
>
> Seems like something along these line will do:
>
> _file_ = "filepart.txt"
>
> begin_tag = '#VS:CMD:command:START'
> end_tag = '#VS:CMD:command:STOP'
>
> sections = []
> new_section = []
> for line in open(_file_):
>     line = line.strip()
>     if begin_tag in line:
>         new_section = []
>     elif end_tag in line:
>         sections.append(new_section)
>     else:
>         if line: new_section.append(line)
>
> for s in sections: print s
>
> If your want more control, perhaps flagging "inside_section",
> "outside_section" is an idea.

You probably don't want to use regex for something this simple; it's
likely to make things even more complicated.  Is there a space between
the begin_tag and the first word of a section (same question with the
end_tag)?



From quentel.pierre at wanadoo.fr  Sat Mar 10 14:45:15 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 10 Mar 2007 11:45:15 -0800
Subject: CGI handler: Retrieving POST and GET at the same time
In-Reply-To: <1173552765.277146.273730@t69g2000cwt.googlegroups.com>
References: <1173552765.277146.273730@t69g2000cwt.googlegroups.com>
Message-ID: <1173555915.830075.201140@h3g2000cwc.googlegroups.com>

On 10 mar, 19:52, "Samuel" <knipk... at gmail.com> wrote:
> Hi,
>
> I have the following form:
>
> <form action="?one=1" method="post">
> <input  type="hidden" name="two" value="2" />
> </form>
>
> and would like to retrieve both fields, "one" and "two". However, the
> following does not work:
>
> form_data = cgi.FieldStorage()
> for key in form_data:
>     print key + ":", form_data[key].value
>
> It prints out:
> two: 2
>
> How can I retrieve the GET variables in that context?
>
> -Samuel

Hi,

The argument passed in the url of the "action" attribute can be
retrieved by :

    os.environ["QUERY_STRING"]

To get the key-value dictionary :

    cgi.parse_qs(os.environ["QUERY_STRING"])

Regards,
Pierre



From facundo at taniquetil.com.ar  Tue Mar 27 18:24:49 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Tue, 27 Mar 2007 22:24:49 +0000 (UTC)
Subject: socket read timeout
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
	<mailman.5668.1175003334.32031.python-list@python.org>
	<VegOh.15507$nh4.13055@newsfe20.lga>
Message-ID: <euc5jg$ncu$1@sea.gmane.org>

hg wrote:

> Do you mean use select ?

No, socket's timeout:

>>> import socket
>>> s = socket.socket()
>>> s.settimeout(5)
>>> ...

Regards, 

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From grahn+nntp at snipabacken.dyndns.org  Tue Mar 27 06:07:51 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 27 Mar 2007 10:07:51 GMT
Subject: Sending ECHO_REQUEST (pinging) with python
References: <pan.2007.03.26.06.30.33@gmail.com>
	<mailman.5621.1174902301.32031.python-list@python.org>
	<pan.2007.03.26.14.50.09@gmail.com>
Message-ID: <slrnf0hm95.3nr.grahn+nntp@frailea.sa.invalid>

On Mon, 26 Mar 2007 16:50:09 +0200, Thomas Dybdahl Ahle <lobais at gmail.com> wrote:
> Den Mon, 26 Mar 2007 11:24:34 +0200 skrev Michal 'vorner' Vaner:
>> On Mon, Mar 26, 2007 at 08:30:16AM +0200, Thomas Dybdahl Ahle wrote:
>
>>> Do anybody know how to do this in python?
>
>> You need root for that and the ping command is allowed to have them by
>> suid bit. You can execute ping from inside python and use ping as is, if
>> you need.
>
> Yeah, I could execute ping, but it would lock me harder to the platform.

True; Linux ping and Solaris ping have incompatible flags and output.
I even believe several implementations are in use on Linux. Then add
Windows to the mix ...

-Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From iltchevi at gmail.com  Fri Mar  9 16:55:39 2007
From: iltchevi at gmail.com (ici)
Date: 9 Mar 2007 13:55:39 -0800
Subject: Creating a DLL file from Python Code
In-Reply-To: <1173442086.281115.95300@q40g2000cwq.googlegroups.com>
References: <1173442086.281115.95300@q40g2000cwq.googlegroups.com>
Message-ID: <1173477339.725037.311650@p10g2000cwp.googlegroups.com>

On Mar 9, 2:08 pm, macedo.si... at gmail.com wrote:
> Hi,
>
> I would like to request your attention for this very specific issue:
>
> I have several classes in Python, and now I want simply re-use it, in
> other language.
>
> The closest to solution I think I came was with this site:http://www.py2exe.org/index.cgi/Py2exeAndCtypesComDllServer
> but I not able to solve questions related with TLB files and
> __init__.py files.
>
> So, could anyone give a tip about how to creat a dll file from Python?
> It is possible under any conditions?
>
> thank in advance
>
> macedo

Best way: http://www.python.org/doc/ext/embedding.html , than use your
modules as py files or string constants.



From devrim.erdem at gmail.com  Fri Mar 30 11:38:03 2007
From: devrim.erdem at gmail.com (DE)
Date: 30 Mar 2007 08:38:03 -0700
Subject: Indentation for code readability
In-Reply-To: <1175265820.774681.245960@d57g2000hsg.googlegroups.com>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<1175265820.774681.245960@d57g2000hsg.googlegroups.com>
Message-ID: <1175269083.156023.52580@n76g2000hsh.googlegroups.com>

>
> > The curly brackets have no functional meaning...
>
> "Curly brackets have no functional meaning"?  Surely you must be
> thinking of C, but not C++.  Some of the most powerful idioms (idia?)
> of C++ make use of functionality that runs when a closing bracket
> causes local variables to fall out of scope.  In fact, this technique
> is crucial to writing exception-safe code.

The curly brackets have no functional meaning in the scope of the
example I have written in my original mail. I usually ask C++ memory
management issues in in the relevant newsgroup :)



From enleverlesX.XmcX at XmclaveauX.com  Fri Mar 30 05:57:32 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Fri, 30 Mar 2007 11:57:32 +0200
Subject: Object Oriented Database with interface for Pyhton
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
	<1175247009.786698.72390@l77g2000hsb.googlegroups.com>
Message-ID: <460cdf1a$0$5099$ba4acef3@news.orange.fr>

Hi!

>>> http://www.sqlalchemy.org/

No.
sqlalchemy is an object-oriented-interface(or wrapper)

Alfaeco want an Object-Oriented-Database (like Jasmin, Cach?, etc.)


@-salutations

Michel Claveau



From raims at dot.com  Fri Mar 30 06:35:05 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Fri, 30 Mar 2007 12:35:05 +0200
Subject: How can I get the content of a web site using http library
References: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
	<1175196846.439678.109250@y66g2000hsf.googlegroups.com>
	<1175197795.023801.158240@d57g2000hsg.googlegroups.com>
	<1175200650.420019.44000@o5g2000hsb.googlegroups.com>
Message-ID: <1hvsfyx.1iwlle6elj1uwN%raims@dot.com>

<irstas at gmail.com> wrote:

> http://www.python.org/doc/current/lib/module-urllib2.html
> 
> Look into urlopen's data parameter.

I add also this tutorial to the plate:
http://www.voidspace.org.uk/python/articles/urllib2.shtml

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From jeff at jmcneil.net  Sun Mar  4 10:05:12 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Sun, 4 Mar 2007 10:05:12 -0500
Subject: RSS feed creator
In-Reply-To: <esebu7$jq2$1@news.in.tum.de>
References: <esebu7$jq2$1@news.in.tum.de>
Message-ID: <82d28c40703040705g4dddc8dbvdd112982d292d5c6@mail.gmail.com>

What about this?

http://www.dalkescientific.com/Python/PyRSS2Gen.html



On 3/4/07, Florian Lindner <Florian.Lindner at xgm.de> wrote:
> Hello,
> I'm looking for a python library that creates a RSS and/or Atom feed. E.g. I
> give a list like that:
> [
>   [title1, short desc1, author1],
>   [title2, short desc2, author2],
> ]
>
> and the library creates a valid feed XML file. (return as a string)
>
> Thanks,
>
> Florian
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From stevewilliams at wwc.com  Wed Mar  7 23:26:42 2007
From: stevewilliams at wwc.com (Steve Williams)
Date: Thu, 08 Mar 2007 04:26:42 GMT
Subject: Jython Data Extraction problem
Message-ID: <6gMHh.10662$Ih.388@trnddc02>

The data is an 8-byte 2s complement binary integer stored in a MSSQL 
2005 CHAR column.  (COBOL did that, not me). I'm using zxJDBC to read 
the data and Jython to process.
I could extract the integer if it wasn't returned in the resultset as 
unicode.  Things like ord(char) and struct.unpack('>B',char) to get at 
the bits don't seem to work.  struct.unpack('>g',string) is not available.
I've tried fooling with charset in the url and the connect statement and 
tried encode, but I have no experience here.
Is there anyway to get Jython/zxJDBC to stop converting the string to 
unicode?
Any advice is welcome.


From zhonghua.m.yang at gmail.com  Mon Mar 26 15:01:50 2007
From: zhonghua.m.yang at gmail.com (ZMY)
Date: 26 Mar 2007 12:01:50 -0700
Subject: Does Numpy work on QNX 4.25 with Python 2.2?
Message-ID: <1174935710.642334.141790@d57g2000hsg.googlegroups.com>

I am trying to convert some old Fortran code into Python program and
get them work on a QNX 4.25 system. Since the program requires speed,
I think using Numpy is really necessary. But I haven't found anything
on web about using numpy on QNX 4.25 (especially the for python
version 2.2).

Do any of you have experience on this problem?

Thanks a lot in advance!

- Zhonghua



From rds1226 at sh163.net  Wed Mar  7 15:18:10 2007
From: rds1226 at sh163.net (John)
Date: Wed, 7 Mar 2007 15:18:10 -0500
Subject: Is numeric keys of Python's dictionary automatically sorted?
Message-ID: <esn6nu$c8nt$1@netnews.upenn.edu>

I am coding a radix sort in python and I think that Python's dictionary may 
be a choice for bucket.

The only problem is that dictionary is a mapping without order. But I just 
found that if the keys are numeric, the keys themselves are ordered in the 
dictionary.

part of my code is like this:
radix={}
    for i in range(256):
        radix[i]=[]

I checked and found that it is ordered like: {1:[], 2:[], 3[],...}

So I can just print out the contents of the dictionary in the desired order 
without additional code.
I also tried adding new numeric keys and found that the dictionary's keys 
are still ordered.

However, I am not sure whether it is always like this. Can anybody confirm 
my finding?
 




From michele.simionato at gmail.com  Thu Mar  1 04:21:38 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 1 Mar 2007 01:21:38 -0800
Subject: design question: no new attributes
In-Reply-To: <8BIEh.1349$QI4.489@trnddc01>
References: <8BIEh.1349$QI4.489@trnddc01>
Message-ID: <1172740898.554574.215020@z35g2000cwz.googlegroups.com>

On Feb 26, 10:48 pm, "Alan Isaac" <ais... at american.edu> wrote:
> I have a class whose instances should only receive attribute
> assignments for attributes that were created at inititialization.
> If slots are not appropriate, what is the Pythonic design for this?
>
> Thanks,
> Alan Isaac

There is a Cookbook recipe for that:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252158

 Michele Simionato



From nisimura at gmail.com  Fri Mar 16 22:26:04 2007
From: nisimura at gmail.com (nisimura at gmail.com)
Date: 16 Mar 2007 19:26:04 -0700
Subject: Python Eggs on Cygwin
In-Reply-To: <mailman.5175.1174048621.32031.python-list@python.org>
References: <1174005208.972118.104860@l77g2000hsb.googlegroups.com>
	<mailman.5175.1174048621.32031.python-list@python.org>
Message-ID: <1174098364.850298.319710@l77g2000hsb.googlegroups.com>

Jason,

On 3/16/07, Jason Tishler <jason at tishler.net> wrote:
> The following is a WAG...
>
> Does the MySQL Python module contain shared extension modules (i.e.,
> DLLs)?  If so, are they executable?  If not, then make them so (i.e.,
> chmod +x).

I did:

  % unzip MySQL_foo_bar.eggs
  % chmod +x MySQL_foo_bar.eggs/_mysql.dll
  % zip -r MySQL_foo_bar.eggs MySQL_foo_bar.eggs

but got the same result.  After trials and errors, I found unzipped
eggs were cached in the $HOME/.python-eggs/ directory!

  % chmod +x ~/.python-eggs/MySQL_foo_bar/_mysql.dll

did the trick and MySQL module was loaded successfully.

Thanks for your advice.

--
Kazu Nisimura



From tjreedy at udel.edu  Sat Mar 10 15:59:35 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 Mar 2007 15:59:35 -0500
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><7x7itqqxlh.fsf@ruckus.brouhaha.com><1173453432.893222.308610@j27g2000cwj.googlegroups.com><pan.2007.03.09.15.32.01.112493@gmx.net><1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<esukru$1v1$1@news2.zwoll1.ov.home.nl>
Message-ID: <esv67l$2p4$1@sea.gmane.org>


"Anton Vredegoor" <anton.vredegoor at gmail.com> wrote in message 
news:esukru$1v1$1 at news2.zwoll1.ov.home.nl...
| Raymond Hettinger wrote:
|
| > To make the solutions equi-probable, a simple approach is to
| > recursively enumerate all possibilities and then choose one of them
| > with random.choice().
|
| Maybe it is possible to generate the possibilities by an indexing
| function and then use randint to pick one of them. I suppose this is
| like the bricks and bins problem this thread was about:
|
| 
http://groups.google.nl/group/comp.lang.python/browse_thread/thread/4782b54fa39b3bad
|
| Except that the bins now have at least 1 brick in them (if we have
| positive numbers).
|
| I posted a rather simplistic solution (but working I think) after Steven
| Taschuk made some insightful remarks. I believe it is possible to
| generate the list of numbers directly instead of permuting a list of '0'
| and '1' characters and then finding the positions of the '1' elements.

Partitioning positive count m into n positive counts that sum to m is a 
standard combinatorial problem at least 300 years old.  The number of such 
partitions, P(m,n)  has no known exact formula but can be computed 
inductively rather easily.  The partitions for m and n can be ranked in 
lexicographic order from 0 to P(m,n)-1.  Given a rank r in that range, one 
can calculate the particular partition that has that rank.  So a 
equi-probable random count in the range can be turned into a equi-probable 
random partition.

This topic is section 3.1 in Combinatorial Algorithms: Generation, 
Enumeration, and Search by Kreher and Stinson.  The authors reference 
several other books as their sources.

I plan to someday rewrite many of their pseudocode algorithms in Python.

Terry Jan Reedy





From pchase at sulross.edu  Sun Mar 18 20:51:29 2007
From: pchase at sulross.edu (Peter Chase)
Date: Sun, 18 Mar 2007 19:51:29 -0500
Subject: [Edu-sig] minimum age to learn python (a.k.a graphical vs text
	languages)
In-Reply-To: <45F2CFC4.5010801@bryant.edu>
References: <45F2CFC4.5010801@bryant.edu>
Message-ID: <45FDDE91.6010005@sulross.edu>

I used to judge science fairs in the DC area.  There were junior and 
senior divisions, and the junior division age range was from 6th to 9th 
grades.  At the time I got the occasional project written in Basic, many 
of which were very interesting.  I would think that Python would easily 
outclass Basic!  It would depend entirely upon the individual student.  HTH

Brian Blais wrote:
> Hello,
>
> I was wondering what the approximate minimum age to learn python is.  Has anyone had 
> experience teaching middle school students, or elementary school students Python? 
> What brought this up for me is thinking about starting a Lego robots group in a local 
> middle school.  I only teach college, and have little experience with middle school 
> students, so I find it hard to guess what they could actually do.  I started 
> programming when I was about 5th grade, on a Commodore VIC 20 (3.5k RAM!) in basic, 
> but I don't think I am typical.  (Of course, now, you can probably infer my age to 
> within 2 years!  :)  ).
>
>
> I've written something so that students can program in Python syntax to run the Lego 
> Mindstorms robots.  The most commonly used language for these robotos, in the middle 
> school, is Robolab which is entirely graphical.  Although a good program, I find 
> there are some drawbacks:
> 1) Robolab is commercial, and not all schools can afford this above and beyond the 
> price of the lego mindstorms
> 2) Robolab only runs on Mac/Windows, and not Linux, so those schools that have tried 
> to save money on the operating system get whacked there too
> 3) Robolab can *only* do Lego robots.
>
> Although you learn the basic language structures (loops, branching, etc...), because 
> it is graphical, Robolab doesn't translate directly.  Perhaps this is enough for kids 
> to start, but perhaps one can do better.
>
> On the other hand, my pynqc tool (which uses the freely available nqc language for 
> the Lego Mindstorms) is:
> 1) free (in both senses)
> 2) runs on Mac/Linux/Windows
> 3) because you use python syntax, it is easier to go and do other python projects not 
> involving robots
>
> In my mind, this opens up more doors, but it is not graphical.
>
> I wanted to hear responses from people who have experience teaching programming in 
> elementary/middle (or even high) school.  Do graphical languages make a big 
> difference?  Do text-based languages put up barriers to young learners?  Is it no big 
> deal either way?
>
>
> 		thanks,
>
> 			Brian Blais
>
>   



From tkpmep at hotmail.com  Fri Mar 16 13:59:07 2007
From: tkpmep at hotmail.com (tkpmep at hotmail.com)
Date: 16 Mar 2007 10:59:07 -0700
Subject: Finding the insertion point in a list
Message-ID: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>

I have an ordered list e.g. x = [0, 100, 200, 1000], and given any
positive integer y, I want to determine its appropriate position in
the list (i.e the point at which I would have to insert it in order to
keep the list sorted. I can clearly do this with a series of if
statements:

if y<x[1]:
    n = 0
elif y < x[2]:
    n = 1
elif y < x[3]:
    n = 2
else:
    n = 3

Or with a generator comprehension
n  = sum ( y>x[i] for i in range(len(x)) ) - 1

But there  has to be a cleaner way, as the first approach is unwieldy
and does not adapt to changing list lengths, and the second is not
obvious to a casual reader of the code.

My list will typically have 2 to 5 items, so speed is not a huge
issue. I'd appreciate your guidance.

Sincerely

Thomas Philips



From fd.calabrese at gmail.com  Fri Mar  9 09:44:01 2007
From: fd.calabrese at gmail.com (cesco)
Date: 9 Mar 2007 06:44:01 -0800
Subject: number generator
Message-ID: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>

I have to generate a list of N random numbers (integer) whose sum is
equal to M. If, for example, I have to generate 5 random numbers whose
sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
simple pattern or function in Python to accomplish that?

Thanks and regards
Francesco



From Thomas.Ploch at gmx.net  Tue Mar  6 07:51:11 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Tue, 06 Mar 2007 13:51:11 +0100
Subject: Device Drivers in python(kernel modules)
In-Reply-To: <180b672e0703060409i7eca1b65se10923c79a8f5b23@mail.gmail.com>
References: <180b672e0703060409i7eca1b65se10923c79a8f5b23@mail.gmail.com>
Message-ID: <45ED63BF.3030101@gmx.net>

rishi pathak schrieb:
> I am not much of a kernel programmer , I have a requirement to shift a
> python code to work as a kernel module.
> So I was just wondering whether we can write a kernel module in python.
> A thought is that if we can somehow convert python code into a C object
> code then it can be done.
> Can some one suggest something..anything

http://wiki.python.org/moin/elmer

This tool is able to run Python Code as if it was written in C.
Perhaps this might help you, but I am not pretty sure since it had to be
included in the kernel tree.

Thomas



From john at datavoiceint.com  Fri Mar 16 09:33:21 2007
From: john at datavoiceint.com (HMS Surprise)
Date: 16 Mar 2007 06:33:21 -0700
Subject: Importing
Message-ID: <1174052001.880975.165780@b75g2000hsg.googlegroups.com>


Greetings,

First I will admit I am new to Python but have experience with C++ and
some Tcl/Tk. I am starting to use a tool called MaxQ that  uses
jython. I have been studying Rossum's tutorial but still am unclear on
importing, the use of self, and calling functions with their own name
in quotes. In the code below the lines between #Start and #End are
generated by browsing web pages. In a large test this section can
become quite large. The maxQ documentation suggests breaking it up
into functions. If so could these functions be placed in a separate
file and imported? Is it acceptable to import into a class? If
imported as a function will self as used here need to be changed?
Would it be better to duplicate class and import whole classes?

Any suggestions will be appreciated, especially other Python
tutorials.

Best Regards,

jh

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

# Generated by MaxQ
[com.bitmechanic.maxq.generator.JythonCodeGenerator]
from PyHttpTestCase import PyHttpTestCase
from com.bitmechanic.maxq import Config
global validatorPkg
if __name__ == 'main':
    validatorPkg = Config.getValidatorPkgName()
# Determine the validator for this testcase.
exec 'from '+validatorPkg+' import Validator'


# definition of test class
class MaxQTest(PyHttpTestCase):
    def runTest(self):
        self.msg('Test started')

    #Start

        self.msg("Testing URL: %s" % self.replaceURL('''http://
www.dogpile.com/'''))
        url = "http://www.dogpile.com/"
        params = None
        Validator.validateRequest(self, self.getMethod(), "get", url,
params)
        self.get(url, params)
        self.msg("Testing URL: %s" % self.replaceURL('''http://
www.dogpile.com/favicon.ico'''))
        url = "http://www.dogpile.com/favicon.ico"
        params = None
        Validator.validateRequest(self, self.getMethod(), "get", url,
params)
        self.get(url, params)

    #End

    # ^^^ Insert new recordings here.  (Do not remove this line.)


# Code to load and run the test
if __name__ == 'main':
    test = MaxQTest("MaxQTest")


#   test.Run()		#Either of these two lines work equally well.
    test.runTest()	#I suspect that Run() is a method of
PPyHttpTestCase or a builtIn



From rkmr.em at gmail.com  Fri Mar  9 20:40:05 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Fri, 9 Mar 2007 17:40:05 -0800
Subject: whois python interface
Message-ID: <e04d2e90703091740q7a6eee6di5ac2a8f4488d1dd3@mail.gmail.com>

Is there a python whois interface? I googled and tried rwhois.py but
it doesnt work at all.

thanks
mark
>>> a=rwhois.DomainRecord('google.com')
>>> a.chooseserver()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "rwhois.py", line 270, in chooseserver
    tmp=self._whois()
  File "rwhois.py", line 327, in _whois
    raise 'NoSuchDomain', self.domain
NoSuchDomain: google.com


From henriklied at gmail.com  Mon Mar 12 19:13:51 2007
From: henriklied at gmail.com (Henrik Lied)
Date: 12 Mar 2007 16:13:51 -0700
Subject: Starting an external, independent process from a script
Message-ID: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>

Hi there!

I'm trying to create a video uploading service (just to learn). The
system is mostly based on Django, but the question I'm looking an
answer for is more related to Python.

So, the user gets to upload a video file. This can either be a mpg,
avi or mp4-file. When the file is saved to its location, I want to
convert it to FLA (Flash Video). I'm currently using Mplayers
Mencoder, and this works great. The Mencoder is retrieved through
running os.system("mencoder variables here")

The problem with this is that the user has to wait until the movie is
done encoding until he can go around with his business. I don't look
upon this as ideal.

So - I want to spawn a new system process. I need some good pointers
on how to do this right.

Any input? :-)

Thanks a lot in advance!



From bbbart at inGen.be  Sun Mar  4 04:09:20 2007
From: bbbart at inGen.be (Bart Van Loon)
Date: Sun, 4 Mar 2007 14:09:20 +0500
Subject: portable Python ifconfig
References: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
Message-ID: <slrneul360.a94.bbbart@charles.inGen.islamabad>

It was Sun, 4 Mar 2007 02:38:58 +0500, when Bart Van Loon wrote:
> Hi all,
>
> I'm looking for a portable (FreeBSD and Linux) way of getting typical
> ifconfig information into Python.

After lots of trial and error (I'm proficient in C at all), I puzzled
togehter the following. It works (at least on FreeBSD and Linux), but is
still fairly rough, as it returns an empty string when given a non
existing or down interface.

I'll clean it up in due time. :-)

#include "Python.h"

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <netinet/in.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <stdio.h>
#include <ifaddrs.h>
#include <string.h>

// parameters: string (interface name)
// output: string (ip address of interface in decimal notation)
PyObject * ipaddr(PyObject *self, PyObject *args) {

    char ip[ 200 ];
    char *itf;

    if (! PyArg_ParseTuple(args, "s", &itf)) {
            PyErr_SetString(PyExc_Exception, "no interface given!");
            return NULL;
    }
    
  struct ifaddrs *ifa = NULL, *ifp = NULL;

  if (getifaddrs (&ifp) < 0)
    {
      perror ("getifaddrs");
      return NULL;
    }

  for (ifa = ifp; ifa; ifa = ifa->ifa_next)
    {
      socklen_t salen;

      if (ifa->ifa_addr->sa_family == AF_INET)
        salen = sizeof (struct sockaddr_in);
      else if (ifa->ifa_addr->sa_family == AF_INET6)
        salen = sizeof (struct sockaddr_in6);
      else
        continue;

      if (strncmp(ifa->ifa_name, itf, sizeof(itf))) {
         continue;
      }

      if (getnameinfo (ifa->ifa_addr, salen,
                       ip, sizeof (ip), NULL, 0, NI_NUMERICHOST) < 0)
        {
          perror ("getnameinfo");
          continue;
        }
        break;

    }

  freeifaddrs (ifp);

  return Py_BuildValue("s", ip);
}

static PyMethodDef ifconfig_methods[] = {
    {"ipaddr", (PyCFunction)ipaddr, METH_VARARGS, "ipaddr(string)\n"},
    {NULL, NULL, 0, NULL}
};

DL_EXPORT(void) initifconfig(void)
{
    Py_InitModule3("ifconfig", ifconfig_methods, "Provides a function to get an ip address of a certain interface.\n");   
}

Inspiration came from and credit goes to the author of
http://www.hungry.com/~alves/local-ip-in-C.html

-- 
regards,
BBBart

   Hobbes : How is the diorama coming along?  
   Calvin : I'm almost finished.
   Hobbes : I don't see the roadrunner. Weren't you going to put one in?  
   Calvin : See the cotton balls I glued down?  
   Hobbes : Yeah?  
   Calvin : The roadrunner just ran out of the scene leaving behind clouds 
            of dust!


From Stuart.Taylor at disney.com  Tue Mar 13 05:50:25 2007
From: Stuart.Taylor at disney.com (Taylor, Stuart)
Date: Tue, 13 Mar 2007 05:50:25 -0400
Subject: Readline()
In-Reply-To: <2adc542f0703121851x6dad3b2fg6fb35d5bf3eb77aa@mail.gmail.com>
Message-ID: <1E3F89921C854A49B8307B9716633F0105A516C1@SM-GBLO-XM32.emea.wdpr.disney.com>

i have a thread class which should read the output from the procedure
line by line and finish when the thread is set to kill:
 
class KillableThread(threading.Thread):
    def __init__(self, name="thread", *args, **kwargs):
        threading.Thread.__init__(self, *args, **kwargs)
        self.name = name
        self.killed = 0
    def kill(self):
        self.killed = 1
    def run(self):
        self.id = threading._get_ident()
        self.Proc      =
subprocess.Popen(["python","-tt","output_file.py"], cwd =
os.getcwd(),stdin=subprocess.PIPE, stdout = subprocess.PIPE, stderr =
subprocess.STDOUT)
        retval= None 
        while retval == None and not self.killed:
            line = self.Proc.stdout.readline()
            retval=self.Proc.poll()
 
to replicate my problem the output_file.py requires a user input. i ask
for a user input as my thread will sit waiting on
self.Proc.stdout.readline(). This is the point i want to have a timeout
or be able to end my thread as there is no output from the output_file. 
 
The main approch i cannot implement is to be able to kill the thread as
it remains hung on readlines()
 

________________________________

From: Sick Monkey [mailto:sickcodemonkey at gmail.com] 
Sent: 13 March 2007 01:51
To: Taylor, Stuart
Cc: python-list at python.org
Subject: Re: Readline()


Maybe if you show us your code we can better assist you.  

But maybe you can use a global variable or a try-catch method to keep
threads from staying alive and help better control your code.  


On 3/12/07, Taylor, Stuart <Stuart.Taylor at disney.com> wrote: 

	I have been working on running an external process using
subprocess.popen for a few days. 
	The process is ran over the network to another machine. 
	One thing I have found is that if I perform readline() on the
stdout it will hang if the process loses connection. 

	I have tried a few things in a test example: one is to use
stdin.write then stdin.flush() which send a string that readline() will
read and it ends correctly but doesn't work on the project I need it to
work on. Another is to try using threads and ignoar the thread when  the
process has lost connection but this still leaves the open thread alive
even when the main app has finished. 

	I am relatively new to python and I may be making a fundemantal
mistake in my implementation, can anyone please inform me of whether
sticking with subprocess.popen and readline() is the correct procedure
for this sort of task? 

	And if anyone can point me in the correct implementation of this
problem I would be gratefull. 


	Thank you 

	Stuart 


	--
	http://mail.python.org/mailman/listinfo/python-list
	


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From raims at dot.com  Wed Mar 28 16:01:15 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 28 Mar 2007 22:01:15 +0200
Subject: Question about extending tuple
References: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>
Message-ID: <1hvpguk.1vxcmp218feo4oN%raims@dot.com>

abcd <codecraig at gmail.com> wrote:
> I wanted to extend tuple but ran into a problem.  Here is what I
> thought would work

I think you should take a look at this to do it properly from the Python
devs:
http://svn.python.org/view/python/trunk/Lib/collections.py

Look for NamedTuple

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From noway at ask.me  Thu Mar 22 04:23:13 2007
From: noway at ask.me (Giovanni Bajo)
Date: Thu, 22 Mar 2007 09:23:13 +0100
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <1174529579.990955.116390@l77g2000hsb.googlegroups.com>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
	<1174529579.990955.116390@l77g2000hsb.googlegroups.com>
Message-ID: <R1rMh.18272$6.13299@tornado.fastwebnet.it>

On 22/03/2007 3.13, John Pye wrote:

>> I suggest people to try my GCC 4.1.2 binary installer for Windows which fully
>> integrates with Python and has scripts in place to solve the MSVCR71.DLL
>> problem. It was announced on this very list a few days ago:
>>
>> http://www.develer.com/oss/GccWinBinaries
> 
> Hi Giovanni,
> 
> Thanks very much for that suggestion. It looks like you have done some
> good work on addressing this problem.
> 
> I wonder if you might be able to expand on what those 'serious
> problems' with GCC 4.x on the Windows platform are?

Have a look here:
http://www.mingw.org/MinGWiki/index.php/GccStatus

> Also, can you comment on how one might use your compiler bundle with
> MSYS? In particular, I like to run SCons from an MSYS prompt. Assuming
> I don't want to kill my old MinGW and Cygwin installations, how do you
> recommend that one proceeds to set up a working GCC 4 environment on
> Windows? (I haven't downloaded it just yet; I'm on Linux today!)

I personally don't use MSYS so I don't know exactly. I use SCons too, and I 
simply run it from the normal command prompt.

I *believe* it's sufficient to unpack MSYS somewhere (you can either unpack it 
*over* the directory where you installed my GCC package, or somewhere else, I 
believe it works either way); since the GCC binaries are added to the system 
PATH by the installer, you should able to run it anyway. You can try by simply 
invoking "gcc -v" at the MSYS prompt and see if it's picking up the right 
version of GCC.

I would appreciate if you give some feedback about this. I would like to 
incorporate your findings on the webpage.
-- 
Giovanni Bajo


From b83503104 at yahoo.com  Sun Mar  4 07:56:41 2007
From: b83503104 at yahoo.com (bahoo)
Date: 4 Mar 2007 04:56:41 -0800
Subject: transfer data from one machine to another
Message-ID: <1173013001.510046.42270@64g2000cwx.googlegroups.com>

Hi,

I have ssh access to two linux machines (both WITHOUT root account),
and I'd like to copy data from one to another.
Since the directory structure is different, I want to specify in a
script (ideally in python, because that's what I want to learn) what
to copy over like this:

source: /home/john/folderA
destination: /home/smith/folderB

I'm a newbie on linux and ssh networking and python, so your
suggestions are welcome! A small working example would be appreciated!

bahoo



From shahmed at sfwmd.gov  Thu Mar  8 11:13:20 2007
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Thu, 8 Mar 2007 11:13:20 -0500
Subject: Copy geodatabase(mdb)  if it is locked
Message-ID: <14A2A120D369B6469BB154B2D2DC34D206FCFFC4@EXCHVS01.ad.sfwmd.gov>

I am trying to copy a geodatabase (.mdb) file from source to destination
using

shutil.copyfile(src, dest)

 

It is working fine but the main problem when the destination (.mdb) file
is locked by other users then it's bumped out and not copied over.

 

Is there any way to copy the locked .mdb file and overwrite it.

 

Any help is highly appreciated.

 

shakir

 

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From kadeko at gmail.com  Tue Mar  6 03:51:55 2007
From: kadeko at gmail.com (looping)
Date: 6 Mar 2007 00:51:55 -0800
Subject: pytz2007c error
Message-ID: <1173171115.780320.203500@64g2000cwx.googlegroups.com>

Hi,
Why this error ?

>>> from pytz import timezone
>>> eastern = timezone('US/Eastern')
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
\__init__.py", line 93, in timezone
  File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
\tzfile.py", line 33, in build_tzinfo
    for trans in data[:timecnt]]
  File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
\tzinfo.py", line 27, in memorized_datetime
    dt = datetime.utcfromtimestamp(seconds)
ValueError: timestamp out of range for platform localtime()/gmtime()
function

I'm running python 2.5 on WinXP French with the egg from CheeseShop.

Same error with all timezone (like timezone('Europe/Zurich'),
timezone('Europe/Amsterdam'), ...) except a few one:
>>> print timezone('UTC')
UTC

Is this a pytz problem or something I didn't understand ?



From b.r.willems at gmail.com  Thu Mar 22 13:04:04 2007
From: b.r.willems at gmail.com (Bart Willems)
Date: Thu, 22 Mar 2007 13:04:04 -0400
Subject: Technical Answer - Protecting code in python
In-Reply-To: <pan.2007.03.22.07.07.29.369580@REMOVEME.cybersource.com.au>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1tkMh.115$mG4.94@newsfe12.lga>
	<pan.2007.03.22.07.07.29.369580@REMOVEME.cybersource.com.au>
Message-ID: <VAyMh.35$ek6.24@newsfe12.lga>

Aaah, *now* we're getting somewhere... :-)

>> All he wants is something that turns 'readable, 
>> changeable python' into 'unreadable, immutable python'.
> 
> chown scriptuser script.py  # a unique user
> chmod a-rwx script.py
> chmod u+rx script.py
> 
> I believe that fully meets the functional requirements. Where shall I send
> the invoice?

If it works on the target machine - I am under the assumption that the 
client is some kind of government office - more likely to run Windows 
than it is to run unix/linux/etc.

Who has a similar solution for windows?


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 21:07:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 23:07:15 -0300
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
	<45E8FADB.7000902@cosc.canterbury.ac.nz>
	<1rgq149m7oern$.1080aifmn5qo8$.dlg@40tude.net>
	<mailman.4702.1173156968.32031.python-list@python.org>
	<1fenbu7prg0bm.3q5rj5s6vex4$.dlg@40tude.net>
	<mailman.4761.1173287732.32031.python-list@python.org>
	<1bdfx695pyh2e.iuxunb0ki5z6$.dlg@40tude.net>
Message-ID: <op.towf6dc2x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 13:13:23 -0300, Alan Franzoni  
<alan.franzoni_invalid at geemail.invalid> escribi?:

> this
> container does create a copy of the object even employing incremental
> operators.
>
> Now, let's suppose I find that container type not useful for my purposes,
> *or* I have already written a different container type which mimicks a
> list's behaviour (adding some kind of functionality, of course).

If the library relies on that behavior, it should be documented as such.  
If you provide an alternative container that does not respect that  
interfase, it's your fault. It it was not documented, it's theirs.

> Now, let's suppose a certain function in that library should give a  
> certain
> result based on the contents of that container, but without modifying the
> original object, but it needs to modify it in order to do some  
> operations.
>
> if the function looks like this:
>
> def foo(container):
> 	container += [1, 2, 3]
> 	...
>
> it might happen that the original object gets modified even when it
> shouldn't, depending on the actual object passed to the library.

And that would be bad coding style in the library. += is an augmented  
assignment, *can* be carried in place, or not. If they want a different  
value for the container, why not just write:

extended_container = container + [1,2,3]

You can't write bulletproof code, but some constructs are safer than  
others.

> What I just mean... I don't see calling extend() to be that painful in
> respect to += . If there were no other way to do it, I would agree it  
> would
> be useful. But if there're such methods, do we really need this syntactic
> sugar to introduce confusion?

Feel free to write a PEP suggesting removal of += and *= from lists.
http://www.python.org/dev/peps/

-- 
Gabriel Genellina



From beliavsky at aol.com  Tue Mar 27 21:08:11 2007
From: beliavsky at aol.com (Beliavsky)
Date: 27 Mar 2007 18:08:11 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <8vbnd4-ulb.ln1@lairds.us>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<7o4ld4-qrv.ln1@lairds.us>
	<1174958090.292094.168150@e65g2000hsc.googlegroups.com>
	<8vbnd4-ulb.ln1@lairds.us>
Message-ID: <1175044091.392835.101120@n76g2000hsh.googlegroups.com>

On Mar 27, 6:32 am, cla... at lairds.us (Cameron Laird) wrote:
> In article <1174958090.292094.168... at e65g2000hsc.googlegroups.com>,Beliavsky <beliav... at aol.com> wrote:
>
>                         .
>                         .
>                         .
>
>
>
> >Your experience with Fortran is dated -- see below.
>
> >> I'll be more clear:  Fortran itself is a distinguished
> >> language with many meritorious implementations.  It can be
> >> costly, though, finding the implementation you want/need
> >> for any specific environment.
>
> >Gfortran, which supports Fortran 95 and a little of Fortran 2003, is
> >part of GCC and is thus widely available. Binaries for g95, also based
> >on GCC, are available for more than a dozen platforms, including
> >Windows, Mac OS X, and Linux. I use both and consider only g95 mature,
> >but gfortran does produce faster programs. Intel's Fortran compilers
> >cost about $500 on Windows and Mac OS and $700 on Linux. It's not
> >free, but I would not call it costly for professional developers.
>
> >Speaking of money, gfortran and g95 have free manuals, the latter
> >available in six languages
> >http://ftp.g95.org/. Final drafts of Fortran standards, identical to
> >the official ISO standards, are freely available. The manual for Numpy
> >costs $40 per copy.
>
> My experience with Fortran is indeed dated.  However,
> I still work with university groups that balk at $500
> for valuable software--sometimes because of admini-
> strative conflicts with licensing (example:  the group
> needs an educational license that fits its team
> perfectly, but educational license have to be approved
> by a campus-wide office that involves the group in
> expenses uncovered by its grants, and ... complications
> ensue).  Intel's compiler, for example, is a great deal,
> and recognized as a trivial expense sometimes--but
> judged utterly impossible by a research group down a
> different corridor.
>
> My summary:  practical success depends on specific
> details, and specific details in the Fortran and Python
> worlds differ.
>
> Also, Beliavsky, thanks for your report on the pertinent
> Fortran compilers.  There *are* other proprietary Fortan
> compilers extant; do you expect them to fade away,
> leaving only g* and Intel, or are you simply remarking
> on those two as the (intellectual) market leaders?

My point was that a few years ago an advantage of Python+Numeric or
Octave or R over Fortran is that the former let one work at a much
higher level, if one restricted oneself to using only free tools. The
creation of g95 and gfortran has changed that somewhat, and the
existence of commercial compilers is a plus, since they can surpass
the free compilers in performance (Intel), functionality (creating
Windows GUI programs entirely in Fortran, for example) or diagnosing
errors (NAG, Lahey/Fujitsu and Salford/Silverfrost). A research group
could purchase a single license of a commercial compiler to use in
nightly builds but use the free compilers for development.

Which commercial compilers will fade away? Decent free compilers will
hurt the market for mediocre commercial ones, which may explain the
demise of the compiler from NA Software. The Fortran 2003 standard
adds many new features to Fortran 95, thus making big demands on
vendors, and I have heard that Lahey and Salford will not be upgrading
their compilers to the new standard. The active vendors appear to be
Absoft, IBM, Intel, Pathscale, Portland, and Sun.



From maxerickson at gmail.com  Sun Mar 11 12:37:26 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Sun, 11 Mar 2007 16:37:26 +0000 (UTC)
Subject: PIL: reading bytes from Image
References: <1173568560.648691.61760@64g2000cwx.googlegroups.com>
	<mailman.4925.1173573914.32031.python-list@python.org>
	<1173629243.214806.220070@s48g2000cws.googlegroups.com>
Message-ID: <Xns98F080662523Dmaxericksongmailcom@80.91.229.5>

"cyberco" <cyberco at gmail.com> wrote:

> Thanks,
> 
> I've tried the StringIO option as follows:
> 
> =================================
> img = Image.open('/some/path/img.jpg')
> img.thumbnail((640,480))
> file = StringIO, StringIO()

Is the above line exactly what you tried? If it is, the comma and 
space in the line are likely the problem. Try either:

from StringIO import StringIO 
file=StringIO()

or

import StringIO
file=StringIO.StringIO()

(using file as a variable name can cause issues if you later want 
access to the built in object 'file')

The following:

>>> import Image
>>> import StringIO
>>> im=Image.new('RGB', (100,100))
>>> fp=StringIO.StringIO()
>>> im.save(fp, 'jpeg')
>>> len(fp.getvalue())
823

Works for me on python 2.5 on windows.


max



From pyapplico at gmail.com  Sun Mar 25 00:09:55 2007
From: pyapplico at gmail.com (pyapplico at gmail.com)
Date: 24 Mar 2007 21:09:55 -0700
Subject: Using remote source code
Message-ID: <1174795795.112606.21720@e65g2000hsc.googlegroups.com>

Is there any possible way that I can place a .py file on the internet,
and use that source code in an .py file on my computer?



From http  Fri Mar 23 01:45:47 2007
From: http (Paul Rubin)
Date: 22 Mar 2007 21:45:47 -0800
Subject: How can I check if the listdir result a directory?
References: <1174628417.345912.91410@l75g2000hse.googlegroups.com>
Message-ID: <7xps70zf5g.fsf@ruckus.brouhaha.com>

"Plissken.s at gmail.com" <Plissken.s at gmail.com> writes:
> for f in os.listdir("."):
>      // how can I check if 'f' a directory?

Your two approaches are 1) use os.stat (or stat.stat) and check the
mode bits; or 2) use os.listdir and catch the OSError exception you
get if you use it on a non-directory.


From B.Ogryczak at gmail.com  Thu Mar  8 09:10:42 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 8 Mar 2007 06:10:42 -0800
Subject: How to check whether file is open or not
In-Reply-To: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
References: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
Message-ID: <1173363042.058736.194420@n33g2000cwc.googlegroups.com>

On Mar 7, 6:28 am, "Ros" <pyalb... at gmail.com> wrote:
> There are 10 files in the folder. I wish to process all the files one
> by one. But if the files are open or some processing is going on them
> then I do not want to disturb that process. In that case I would
> ignore processing that particular file and move to next file.

If you can os.open() with O_EXLOCK flag, it's not open by other
process. Now that should work on Unix, Linux and MacOS X. All Windows
proceeding form NT line, are supposed to be POSIX compatible, but
somehow this flag is not available.







From deets at nospam.web.de  Fri Mar  9 12:56:19 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 18:56:19 +0100
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <1173460205.692316.65980@64g2000cwx.googlegroups.com>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
	<1173449933.926669.90810@n33g2000cwc.googlegroups.com>
	<55d9ehF24cdi0U1@mid.uni-berlin.de>
	<1173452206.029944.255750@j27g2000cwj.googlegroups.com>
	<55ddvkF251n88U1@mid.uni-berlin.de>
	<1173460205.692316.65980@64g2000cwx.googlegroups.com>
Message-ID: <55dle5F24gk52U1@mid.uni-berlin.de>


>> The ? has no meaning. It only has a meaning for an editor.
> 
> So it _does_ have meaning! I'm sorry I just don't buy into this kind
> of abstract programming ideology, and I never really have. I don't
> care what the interpreter finds meaningful and neither, on a day to
> day basis, do most users, I'm sure. It seems like the same kind of
> aesthetic ideology that leads lots of programmers to feel repulsed by
> Python's whitespace block delimiting. There's a more important
> principle being missed by them: the human factor. The guy or gal who's
> actually _using_ this stuff. BTW I don't mean to imply that you're not
> thinking about human readability / useability, just that you don't
> seem to be arguing from that basis.

I certainly do. Because a comment is always a comment. If you happen to 
have a multi-line comment (in python that is) that spans more than a 
page of your current terminal, you clearly will see it as such when 
piped through less - a frequent tool for looking into code of libraries 
for example. At least for me, and I guess some other coders as well.

But a tiny ? or !, the latter one massively changing the semantics of 
the displayed code? I'm not too positive that this will be getting the 
proper attention needed when comprehending the code.

Even the multiline-comments of C are easier, because they feature an 
end-mark. Which for one _is_ easier to implement, thus even "less" might 
implement some syntax  hi-lighting based on it (if the terminal supports 
that, that is. I've been doing my fair share of last-minute hacking 
through malconfigured ssh-connections in vi, no syntax-highlighting 
whatsoever) - while it is much less probable that "less" will grow a 
full blown python parser just for the sake of hi-lighting a !-prefixed 
block of code.


FWIW, I'm totally convinced that the addition of this feature to the 
interpreter itself would be a minor operation that wouldn't cause much 
headache from a implementation POV. It's just I don't buy into its 
usefulness.

> 
>>> What we're talking about here is a form of 'alternate commenting
>>> style'. With the IDE's cooperation it'd work on whole blocks at once,
>>> it would highlight without disrupting the code concerned (at least the
>>> way I'm envisaging it), it would be versatile (could probably be used
>>> for as big a variety of purposes as the # comment), and yes, it'd be
>>> persistent, which is how it would be different from any IDE-based
>>> highlighting.
>> I think you contradict yourself here. On the one side, you want it not
>> disturbing to the eye, yet it should be highlighted, so it will be directly
>> noticed by that same eyes.
> 
> You misread me. I wasn't talking about visual disturbance but 'code
> disturbance'. Let me rephrase..
> "..it would highlight without causing the highlighted code to be
> ignored by the interpreter.."


What do you mean by code-disturbance? Programming is usually something 
that needs carefully assembled sequences of characters, with some 
seemingly minor interpunction characters becoming extremly meaningful. 
And you want to add to that the complexity of something that has _no_ 
meaning at all - for the language. To me that is a disturbance. Clearly 
a matter of taste, though.

> 
>> it _is_ an disturbance. And with an IDE that stores such information in
>> e.g. project metainformation, you can even have the persistence, without
>> the disturbance and without altering python.
> 
> So it's fine and wonderful to add a massive chunk of code to IDEs to
> introduce jargon-strewn behaviour that newbies have little hope of
> comprehending yet alone taking advantage of, and which will inevitably
> behave differently in any IDE that does get around to providing it?
> But adding two special characters to the core language is 'messy'?

Adding two characters to the language from which one's only purpose is 
to support the introduction of jargon-strewn behavior that newbies have 
little hope of comprehending let alone taking advantage of, and which 
will inevitable behave differently in any IDE that does get around 
providing it.

I couldn't say it better. It is exactly my point: the ? is _nothing_ 
without an IDE, where _none_ of them is forced to interpret and 
represent it by any means. Yet still you want to add it? Sorry, I can't 
buy that.

Besides, the whole purpose of IDEs is to add massive chunks of code to 
e.g. analyze class structures, show syntactic errors even before the 
code is run and so on... so if you accept that editing code is more than 
poking with a hex editor on your hard disk image, I fail to see the 
problem of adding such chunks of code if it is feasible.

> I can't argue with your aesthetic dislike of the proposed syntax, it's
> just the reasoning you use to support your stance that doesn't ring
> true to me! (I trust no offense is caused.)

Certainly not. And I don't intend to cause offense myself!

Diez


From hitesh287 at gmail.com  Tue Mar 13 11:45:47 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 13 Mar 2007 08:45:47 -0700
Subject: glob.glob output
In-Reply-To: <45f6bc64$0$23649$426a74cc@news.free.fr>
References: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
	<45f5b0f7$0$9689$426a74cc@news.free.fr>
	<1173796286.625280.147230@c51g2000cwc.googlegroups.com>
	<45f6bc64$0$23649$426a74cc@news.free.fr>
Message-ID: <1173800747.064910.193280@64g2000cwx.googlegroups.com>

On Mar 13, 11:00 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Hitesh a ?crit :
>
> > On Mar 12, 4:33 pm, Bruno Desthuilliers
> > <bdesth.quelquech... at free.quelquepart.fr> wrote:
> >> Hitesh a ?crit :
>
> (snip)
> > Thank you for your reply.
> > From the return value I am trying to figure out whether the file
> > xtRec* exist or not.
>
> Yes, I had understood this !-)
>
> What I wanted to point out was the fact you were discarding this value.
>
> > I am newbie so exuse my ignorance... still learning.
>
> Been here, done that... Don't worry. We're all still learning.
>
> > Somehow when I tried your solution, it takes 10mins to scan 200 plus
> > servers but when I tried my code,
>
> Which one ? The original one, or the one where you first store glob
> results in a list ?
>
> > it takes less then 2 mins.
> > This is a puzzle for me, I gotta figure it out.
>
> i/o are usually expansive, so the difference may comes from the repeated
> print. Also, I'm doing a bit of formatting, which is not your case.
>
> FWIW, my own snippet was just an example of the idiomatic way to read a
> text file line by line. Doing TheRightThing(tm) for your actual problem
> is your responsability !-)

Thank you :-). I understand that now!

hj



From bj_666 at gmx.net  Sat Mar  3 03:17:21 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 03 Mar 2007 09:17:21 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54reqdF22ck5iU1@mid.individual.net>
	<pan.2007.03.02.22.50.54@gmail.com>
Message-ID: <pan.2007.03.03.08.17.20.417536@gmx.net>

In <pan.2007.03.02.22.50.54 at gmail.com>, Thomas Dybdahl Ahle wrote:

> Den Fri, 02 Mar 2007 21:13:02 +0100 skrev Bjoern Schliessmann:
> 
>> Thomas Dybdahl Ahle wrote:
>> 
>>> However I'd really like not to use the lambda, as it slows down the
>>> code.
>> 
>> Did you check how much the slowdown is?
> 
> Yes, the lambda adds 50%

Compared to what?  Compared to a sort that doesn't do what you want?

Ciao,
	Marc 'BlackJack' Rintsch



From bignose+hates-spam at benfinney.id.au  Tue Mar 13 02:06:15 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 13 Mar 2007 17:06:15 +1100
Subject: Program __main__ function (was: Starting Python... some questions)
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
	<et5aub$901$1@registered.motzarella.org>
Message-ID: <87mz2hwuco.fsf_-_@benfinney.id.au>

Jordan at bag.python.org, "Greenberg <"@bag.python.org, "greenbergj\""@NOSPAM.xs4all.nl, wit.edu at bag.python.org, ">"@bag.python.org writes:

> jezonthenet at yahoo.com wrote:
> > * Doesn't the __main__() method automatically execute when I run
> > my python program?
>
> No, there is no special __main__ function, to the best of my
> knowledge.

Guido van Rossum has mused on the idiom of the 'main' function in modules:

    <URL:http://www.artima.com/weblogs/viewpost.jsp?thread=4829>

My idiom for this is:

=====
def __main__(argv=None):
    """ Mainline code for this program """

    from sys import argv as sys_argv
    if argv is None:
        argv = sys_argv

    foo = Foo(argv)     # Foo is the main thing I need
    exitcode = None
    try:
        foo.do_the_main_thing()
    except SystemExit, e:
        exitcode = e.code

    return exitcode

if __name__ == "__main__":
    import sys
    exitcode = __main__(argv=sys.argv)
    sys.exit(exitcode)
=====

The reason for the local 'sys' imports is that I can boilerplate this
code and not have to worry about whether the rest of the program
actually uses the 'sys' module.

The reason for parameterising 'argv', but defaulting it to the system
argv, is that I can unit-test the '__main__' function
programmatically, while still letting it pick up the real argv when
the program is run.

Same reason for catching SystemExit, and then going on to call
'sys.exit()' myself: it allows the __main__ function to be unit-tested
easily, while still letting me use 'sys.exit()' in my application code
whenever it makes sense.

Now, when I write unit tests for my program (i.e. a Python module
designed to be run as a command), it can still be imported safely into
my unit tests, and all the code gets covered by test cases except the
three-line stanza at the end.
Htag.pl 0.0.23 -  Simon Huggins <huggie at earth.li>  Released under GPL
Copyright (C) 1999-2002 Project Purple. http://www.earth.li/projectpurple/

Got sigmatch == ^/home/bignose/\.sigs/news.*$

-- 
 \        "The right to search for truth implies also a duty; one must |
  `\     not conceal any part of what one has recognized to be true."  |
_o__)                                               -- Albert Einstein |
Ben Finney



From gigs at hi.t-com.hr  Tue Mar 27 06:05:07 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 27 Mar 2007 12:05:07 +0200
Subject: tkinter popup
Message-ID: <euaq8n$1l9$1@ss408.t-com.hr>

Hi all

I cant figure out how to disable resizing of my popup window?
How to put this popup window to show in the middle of my text editor?
It is writen with Toplevel.


thx


From gtcopeland at gmail.com  Thu Mar  8 16:11:00 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 8 Mar 2007 13:11:00 -0800
Subject: SQLAlchemy and Oracle Functions?
Message-ID: <1173388259.974981.104090@j27g2000cwj.googlegroups.com>

I have  a need to call an Oracle function, which is not the same thing
as a stored procedure.  Can SQLAlchemy do this directly?  Indirectly?
If so, an example would be appreciated.  If not, how do I obtain the
raw cx_Oracle cursor so I can use that directly?

Thanks,

Greg



From supervau at gmail.com  Wed Mar 14 17:00:46 2007
From: supervau at gmail.com (Frank)
Date: 14 Mar 2007 14:00:46 -0700
Subject: python/C++ wrapper
In-Reply-To: <mailman.5111.1173904975.32031.python-list@python.org>
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
	<mailman.5111.1173904975.32031.python-list@python.org>
Message-ID: <1173906046.481461.10670@b75g2000hsg.googlegroups.com>

On Mar 14, 1:42 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Wed, 14 Mar 2007 01:55:55 -0300, Frank <super... at gmail.com> escribi?:
>
> > is there anyone here that calls C++ programs from python via swig? It
>
> I suggest you read the responses to your previous question; also search
> the list archives for this month.
>
> --
> Gabriel Genellina


Hi Gabriel,

and I suggest you read the question I asked precisely!

Frank



From bbxx789_05ss at yahoo.com  Thu Mar 15 15:49:01 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 15 Mar 2007 12:49:01 -0700
Subject: problem with str()
Message-ID: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>

I can't get the str() method to work in the following code(the last
line produces an error):

============
class test:
        """class test"""
        def __init__(self):
                """I am init func!"""
                self.num = 10
                self.num2 = 20
        def someFunc(self):
                """I am someFunc in test!"""
                print "hello"


obj = test()
obj.someFunc()
names = dir(obj)
print names

methodList = [str for str in names if callable(getattr(obj, str))]
print methodList

x = getattr(obj, methodList[0]).__doc__
print x
print type(x)
print str(getattr(obj, methodList[0]).__doc__)
===========

Here is the output:

$ python test1.py
hello
['__doc__', '__init__', '__module__', 'num', 'num2', 'someFunc']
['__init__', 'someFunc']
I am init func!
<type 'str'>
Traceback (most recent call last):
  File "test1.py", line 23, in ?
    print str(getattr(obj, methodList[0]).__doc__)
TypeError: 'str' object is not callable

This is part of some code in Diving Into Python,Chapter 4.  In case a
function doesn't have a __doc__ string, and therefore __doc__ returns
None, the code needs to convert each __doc__ to a string so that the
result is guaranteed to be a string.



From seberino at spawar.navy.mil  Fri Mar  9 18:21:54 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 9 Mar 2007 15:21:54 -0800
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
In-Reply-To: <7x649e2k47.fsf@ruckus.brouhaha.com>
References: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>
	<mailman.4703.1173163158.32031.python-list@python.org>
	<1173211320.042518.121890@8g2000cwh.googlegroups.com>
	<7x649e2k47.fsf@ruckus.brouhaha.com>
Message-ID: <1173482514.712816.179660@v33g2000cwv.googlegroups.com>

On Mar 6, 12:27 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "seber... at spawar.navy.mil" <seber... at spawar.navy.mil> writes:
> > Sure I can grab the aforementioned URL's contents but what about the
> > NEW contents in the NEW popup window that appears AFTER you press some
> > form buttons?  How grab *that* ?
>
> Usually it's from some fixed url with possibly some query parameters.
> Just figure out the url from your "Properties" in your browser, or by
> studying the javascript that popped up the window.  There are various
> ways the popup sites can make this difficult but it's rare for them
> to bother.


I wanted to make sure to thank you and everyone else for the help.
Indeed this revealed the URL.
I just acted like I wanted to make the mystery URL my home page and it
manifested itself.

Thanks again all,

Chris



From sgeiger at ncee.net  Mon Mar 19 01:50:54 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Mon, 19 Mar 2007 00:50:54 -0500
Subject: list comprehension help
In-Reply-To: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
Message-ID: <45FE24BE.40606@ncee.net>

Since you are dealing with that much information perhaps pytables would 
be useful to you.    http://pytables.sourceforge.net



rkmr.em at gmail.com wrote:
> Hi
> I need to process a really huge text file (4GB) and this is what i
> need to do. It takes for ever to complete this. I read some where that
> "list comprehension" can fast up things. Can you point out how to do
> it in this case?
> thanks a lot!
>
>
> f = open('file.txt','r')
> for line in f:
>         db[line.split(' ')[0]] = line.split(' ')[-1]
>         db.sync()
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From fabio.fzero at gmail.com  Mon Mar 19 08:16:15 2007
From: fabio.fzero at gmail.com (Fabio FZero)
Date: 19 Mar 2007 05:16:15 -0700
Subject: Fun little project
Message-ID: <1174306575.438572.101960@l77g2000hsb.googlegroups.com>

This is what happens when a joke goes too far - so far that it
generates Python code.

http://code.google.com/p/pr0nbot/

Have fun!

[]s
FZero



From max at knirz.de  Fri Mar 30 03:08:52 2007
From: max at knirz.de (Max Kubierschky)
Date: Fri, 30 Mar 2007 09:08:52 +0200
Subject: Game programming for kids: looking for open source 2D game development
	kit
Message-ID: <euid24$ugc$1@online.de>

Hello,

I'm planning to give a game programming course for kids of mixed age.
For this, I am looking for an open source 2D game development kit.
I am also willing to participate in the development of the development kit.

Features I'd like to see
- Possibility to construct simple games via drag and drop without programming
- Integration into an IDE
- Based on Java or Python
Pluses:
- Good Tutorial
- German documentation

Any Ideas?

Max


From noway at ask.me  Thu Mar 22 04:37:52 2007
From: noway at ask.me (Giovanni Bajo)
Date: Thu, 22 Mar 2007 09:37:52 +0100
Subject: [Swig-user] How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5435.1174531581.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>	<4600AA7B.1080605@student.unsw.edu.au>	<mailman.5374.1174456615.32031.python-list@python.org>	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
	<mailman.5435.1174531581.32031.python-list@python.org>
Message-ID: <zfrMh.18290$6.1445@tornado.fastwebnet.it>

On 22/03/2007 3.46, Carl Douglas wrote:

> Hi Giovanni,
> 
> I was wondering if gccmrt can be used with older 3.x versions of GCC?
> 
> Thanks

I think so, but I have not tried it. You just need to copy gccmrt to the bin 
directory, and then copy "libmsvcrt.a" into "libmsvcr60.a", and "libmsvcrtd.a" 
into "libmsvcr60d.a". After that, it should just works.

Let me know if it works for you, so that I can report results on the webpage.
-- 
Giovanni Bajo


From jan.m.danielsson at gmail.com  Wed Mar 14 08:02:36 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Wed, 14 Mar 2007 13:02:36 +0100
Subject: mod_python demo
Message-ID: <45f7e45c$1@griseus.its.uu.se>

Hello all,

   I have written a web-based voting system (add question, add possible
answers to that question, and let users vote) in python. It uses:

   - mod_python
   - postgreql (through psycopg2)

   It includes basic session and user management.

   It's a very simple system, and the session/user management is highly
reusable.

   The point of writing it was just as a small exercise I made for
myself. But now that I'm done with it, I wouldn't mind sharing it with
people wanting to get started with mod_python, but wants to have some
working code to use as a base (or merely look at for ideas).

   Is there any Python/web community site anywhere which allows users to
upload template code for others to use?

   Note: I am a Python newbie, so there are probably lots of
improvements to be done, if anyone cares enough).

-- 
Kind regards,
Jan Danielsson


From laurent.pointal at limsi.fr  Thu Mar 15 05:12:34 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 15 Mar 2007 10:12:34 +0100
Subject: spawn process in a new console window
In-Reply-To: <1173931166.767205.220880@l77g2000hsb.googlegroups.com>
References: <1173923782.156260.299930@p15g2000hsd.googlegroups.com>
	<1173931166.767205.220880@l77g2000hsb.googlegroups.com>
Message-ID: <etb2le$r37$2@news2.u-psud.fr>

gregpinero at gmail.com a ?crit :
> On Mar 14, 9:56 pm, egla... at gmail.com wrote:
>> Hello,
>>
>> I have a script that launches a sequence of other programs, some GUI,
>> some console.  I'd like the console programs to launch in their own
>> console window, instead of all of them sharing the script's console.
>> How do I do that?
>>
> 
> Would the subprocess module help here?  It's available in Python 2.4
> onwards.  I think it's supposed to be a one stop shop for all your
> external application launching needs (Python group, please correct me
> if I'm wrong here).
> 
> -Greg
> 

Try to use "start"

>>> import os
>>> os.system("start cmd")

Open a new console with a cmd shell in it.

See start documentation here http://www.ss64.com/nt/start.html
Or typing help start on the command line.


From gert.cuykens at gmail.com  Fri Mar  2 02:33:08 2007
From: gert.cuykens at gmail.com (gert)
Date: 1 Mar 2007 23:33:08 -0800
Subject: html sql client
In-Reply-To: <pan.2007.03.02.06.33.54.662626@gmx.net>
References: <1172813239.754095.231900@p10g2000cwp.googlegroups.com>
	<pan.2007.03.02.06.33.54.662626@gmx.net>
Message-ID: <1172820787.946209.88810@n33g2000cwc.googlegroups.com>

On Mar 2, 7:33 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <1172813239.754095.231... at p10g2000cwp.googlegroups.com>, gert wrote:
> > I was thinking about making a column module that names the columns, i
> > was hoping there would be some sort of api feature that already exist
> > because parsing sql statemants to figure out which column is refers to
> > what is allot of work.
>
> Are you searching for the `description` attribute of cursors?  Section
> `Cursor Objects`:
>
>    http://www.python.org/dev/peps/pep-0249/


i think so :) if cursor.description would give me for example the word
databases when i do a query like "show databases" or gives me all the
column names when i do "select * from mytable"



From martinunsal at gmail.com  Mon Mar  5 13:31:33 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 5 Mar 2007 10:31:33 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4685.1173114917.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
Message-ID: <1173119492.198000.252500@v33g2000cwv.googlegroups.com>

On Mar 5, 9:15 am, "Chris Mellon" <arka... at gmail.com> wrote:
> That's actually the exact benefit of unit testing, but I don't feel
> that you've actually made a case that this workflow is error prone.
> You often have multiple developers working on the same parts of the
> same module?

Protecting your head is the exact benefit of bike helmets, that
doesn't mean you should bike more more recklessly just because you're
wearing a helmet. :)

Doing text merges is more error prone than not doing them. :)

There are myriad other benefits of breaking up large files into
functional units. Integration history, refactoring, reuse, as I
mentioned. Better clarity of design. Easier communication and
coordination within a team. What's the down side? What's the advantage
of big files with many functional units?

> If you don't do this, you aren't really testing your changes, you're
> testing your reload() machinery.

Only because reload() is hard in Python! ;)

> You seem to have a lot of views about
> what the "Python way" should be and those are at odds with the actual
> way people work with Python. I'm not (necessarily) saying you're
> wrong, but you seem to be coming at this from a confrontational
> standpoint.

When I refer to "Pythonic" all I'm talking about is what I've read
here and observed in other people's code. I'm here looking for more
information about how other people work, to see if there are good
solutions to the problems I see.

However when I talk about what I think is "wrong" with the Pythonic
way, obviously that's just my opinion formed by my own experience.

> Your claim, for example, that the language shouldn't place constraints
> on how you manage your modules is questionable. I think it's more
> likely that you've developed a workflow based around the constraints
> (and abilities) of other languages and you're now expecting Python to
> conform to that instead of its own.

I don't think so; I'm observing things that are common to several
projects in several languages.

> I wonder if you've ever asked yourself why this is the case. I know
> from my own experience why it's done in traditional C++/C environments
> - it's because compiling is slow and breaking things into as many
> files (with as few interdependencies) as possible speeds up the
> compilation process.

I don't think that's actually true. Fewer, bigger compilation units
actually compile faster in C, at least in my experience.

> Absent this need (which doesn't exist in Python),

Python still takes time to load & "precompile". That time is becoming
significant for me even in a modest sized project; I imagine it would
be pretty awful in a multimillion line project.

No matter how fast it is, I'd rather reload one module than exit my
interpreter and reload the entire world.

This is not a problem for Python as scripting language. This is a real
problem for Python as world class application development language.

> In a package __init__, which exists expressly
> for the purpose of exposing it's interior namespaces as a single flat
> one, it makes perfect sense.

OK! That's good info, thanks.

> Nobody I know uses reload() for anything more than trivial "as
> you work" testing in the interpreter. It's not reliable or recommended
> for anything other than that.

That too... although I think that's unfortunate. If reload() were
reliable, would you use it? Do you think it's inherently unreliable,
that is, it couldn't be fixed without fundamentally breaking the
Python language core?

> This is
> still a much faster way than compiling any but the most trivial of
> C/C++ modules.

I'm with you there! I love Python and I'd never go back to C/C++. That
doesn't change my opinion that Python's import mechanism is an
impediment to developing large projects in the language.

> If you don't like working with explicit namespaces, you've probably
> chosen the wrong language.

I never said that. I like foo.Bar(), I just don't like typing
foo.Foo() and bar.Bar(), which is a waste of space; syntax without
semantics.

> I propose that the technique most amenable to source code management
> is for a single file (or RCS level module, if you have a locking RCS)
> to have everything that it makes sense to edit or change for a
> specific feature.

Oh, I agree completely. I think we're using the exact same criterion.
A class is a self-contained feature with a well defined interface,
just what you'd want to put in it's own file. (Obviously there are
trivial classes which don't implement features, and they don't need
their own files.)

> You're also placing far too much emphasis on reload. Focus yourself on
> unit tests and environment scripts instead. These are more reliable
> and easier to validate than reload() in a shell.

I think this is the crux of my frustration. I think reload() is
unreliable and hard to validate because Python's package management is
broken. I appreciate your suggestion of alternatives and I think I
need to come to terms with the fact that reload() is just broken. That
doesn't mean it has to be that way or that Python is blameless in this
problem.

Martin



From kyosohma at gmail.com  Thu Mar 22 13:12:06 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 22 Mar 2007 10:12:06 -0700
Subject: Been a while...
In-Reply-To: <mailman.5466.1174580521.32031.python-list@python.org>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<mailman.5466.1174580521.32031.python-list@python.org>
Message-ID: <1174583526.581809.251420@p15g2000hsd.googlegroups.com>

On Mar 22, 11:21 am, Michael Bentley <mich... at jedimindworks.com>
wrote:
> On Mar 22, 2007, at 10:34 AM, John Salerno wrote:
>
> > Hi guys. It's been a while since I've used Python, so I got a little
> > rusty, but I really want to start using it again, just out of habit
> > and
> > for fun. Can anyone suggest a book or a website with little projects I
> > could work on to keep me busy?
>
> http://www.pythonchallenge.com

"Python Programming: An Introduction to Computer Science" by Zelle has
lots of little homework assignments at the end of each chapter. That
would probably keep you busy and up-to-snuff.

Mike



From david.bear at asu.edu  Tue Mar  6 14:34:03 2007
From: david.bear at asu.edu (David Bear)
Date: Tue, 06 Mar 2007 12:34:03 -0700
Subject: using python to query active directory
Message-ID: <1234705.TuyeK9pzyv@teancum>

Is it possible to use python to make calls agains microsoft active
directory? I suppose this should be qualified by what is needed to do it
from windows (I assume the win32all package) and from linux (if possible).
Any code samples would be great. 
-- 
David Bear
-- let me buy your intellectual property, I want to own your thoughts --


From zburnham at gmail.com  Thu Mar 29 23:34:26 2007
From: zburnham at gmail.com (Evil Otto)
Date: 29 Mar 2007 20:34:26 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
Message-ID: <1175225665.929475.183360@n59g2000hsh.googlegroups.com>

On Mar 29, 2:19 pm, aral... at aol.com wrote:
> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan

I really, really hope that you're looking to generate test data or
filler text.

If you're not, then DIAF.



From pythoneiro at gmail.com  Sat Mar 31 22:40:29 2007
From: pythoneiro at gmail.com (Py Thorneiro)
Date: Sat, 31 Mar 2007 23:40:29 -0300
Subject: Port Function crc_ccitt_update from C++
Message-ID: <73b38a6e0703311940i171d1ffarea79fbbc2da53d68@mail.gmail.com>

Hi folks,

    Please, I don?t understand exactly what this function CRC CCITT UPDATE
in C++ AVR can be ported to Python..

uint16_t
crc_ccitt_update (uint16_t crc, uint8_t data)
{
   data ?= lo8 (crc);
   data ?= data << 4;
   return ((((uint16_t)data << 8) | hi8 (crc)) ? (uint8_t)(data >> 4)
? ((uint16_t)data << 3));
}

Source:
http://tldp.tuxhilfe.de/linuxfocus/common/src2/article352/avr-libc-user-manual-1.0.4.pdf

      In parts reason this lo8 and hi8, is there some good soul here that
can help-me with this conversion?

     I try seach in Google and Koders some code that use it, but I don?t had
sucess...


Big Hugs
Thanks
Regards.


-Py -Thorneiro
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From bbbart at inGen.be  Sun Mar 11 16:49:51 2007
From: bbbart at inGen.be (Bart Van Loon)
Date: Mon, 12 Mar 2007 01:49:51 +0500
Subject: cherrypy sub-process
Message-ID: <slrnev8qrf.vjc.bbbart@charles.inGen.islamabad>

Hi all,

I have written a small program in Python which acts as a wrapper around
mpd and natd on a FreeBSD system. It gets the status, restarts the
processes, etc...

Then, I created a tiny cherrypy webapp which provides a webinterface to
this program. All works fine, but for the following problem:

cherrypy listens on port 1234. whenever I browse to that port and invoke
any action that involves (re)starting mpd or natd, which happens with
commands.getstatusoutput() (which uses os.popen()), I cannot restart
cherrypy without killing the mpd and/or natd processes spawned by it in
the previous session, because port 1234 willl still be in use.

lsof -i tcp tells me that it's exactly those mpd and/or natd processes
which are keeping that port 1234 from freeing up after I (succesfully)
kill cherrypy.

Is there any explanation to this, or, even better, a solution?

Thank you very much in advance.

-- 
regards,
BBBart

   "To make a bad day worse, spend it wishing for the impossible." -Calvin


From aleax at mac.com  Tue Mar 20 11:11:27 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 08:11:27 -0700
Subject: Still the __new__ hell ...
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
	<1174337519.926611@jubilee.claranet.pt>
	<568s5gF287c68U2@mid.individual.net>
	<mailman.5315.1174359956.32031.python-list@python.org>
	<1hv8x6v.1x0ceur1nnwi46N%aleax@mac.com>
	<etomre$9sg$1@panix3.panix.com>
Message-ID: <1hv9kof.1o16iecoclezqN%aleax@mac.com>

Aahz <aahz at pythoncraft.com> wrote:

> In article <1hv8x6v.1x0ceur1nnwi46N%aleax at mac.com>,
> Alex Martelli <aleax at mac.com> wrote:
> >Steve Holden <steve at holdenweb.com> wrote:
> >> 
> >> basestring is a *type*.
> >> 
> >>   >>> basestring
> >> <type 'basestring'>
> >> 
> >> It's the base class of which both str and unicode are subclasses.
> >
> >I believe it used to be a tuple back in Python 2.2 (sorry, don't have a
> >Python 2.2 installation to check this right now).
> 
> Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> >>> basestring
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'basestring' is not defined

Thanks for double checking on my vague and apparently incorrect
historical memory!  Obviously I must have been thinking of some _trick_
whereby one bound basestring to the pair to make isinstance on
basestring work in 2.2 much as it did later, rather than an intrinsic
2.2 feature.


Alex


From heikki at osafoundation.org  Fri Mar 30 03:36:00 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Fri, 30 Mar 2007 00:36:00 -0700
Subject: Python 2.5 fails where 2.4 works when running external program
In-Reply-To: <euibag$7sh$03$1@news.t-online.com>
References: <Ft6dnSSOy5taOJHbnZ2dnUVZ_uednZ2d@comcast.com>
	<euibag$7sh$03$1@news.t-online.com>
Message-ID: <vtCdnd-9duV-IJHbnZ2dnUVZ_hOdnZ2d@comcast.com>

Peter Otten wrote:
> I think Exception.args always was supposed to be a tuple. Starting with 2.5
> Python enforces that constraint:
[...]
> http://docs.python.org/tut/node10.html#SECTION0010300000000000000000
> """
> But use of .args is discouraged. Instead, the preferred use is to pass a
> single argument to an exception (which can be a tuple if multiple arguments
> are needed) and have it bound to the message attribute. 
> """

Excellent, thank you!

-- 
  Heikki Toivonen


From aleax at mac.com  Thu Mar 15 22:59:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 19:59:10 -0700
Subject: Returning other instance from __init__
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
	<1173970438.864747@jubilee.claranet.pt>
Message-ID: <1hv18qy.1nbk1zkji3ep6N%aleax@mac.com>

Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:

> Alex Martelli escreveu:
> > Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:
> ...
> 
> > 
> > E.g.:
> > 
> > class C1(object):
> >     def __new__(cls, xxx):
> >         if xxx: return type.__new__(cls, xxx)
> >         else: return C1.load(xxx)
> >     @staticmethod
> >      def load(xxx): return ...whatever...
> >      def __init__(self, xxx):
> >          if hasattr(self, 'foo'): return
> >          self.foo = 'foo'
> >          self.bar = 'bar'
> > 
> 
> 
> Just for a better understanding ...
> Can I do this?
> 
> class C1(object):
>     def __new__(cls, xxx):
>         if xxx:
>               cls.foo='foo'
>               cls.bar='bar'
>               return type.__new__(cls, xxx)
>         else:
>               return C1.load(xxx)
>     @staticmethod
>     def load(xxx): return ...whatever...
>     # OMMIT THE __init__
>     # or
>     def __init__(self, xxx):
>         pass

Yes (omitting the __init__ is better than having it empty), but why do
you want to alter the class object itself, rather than the INSTANCE
you're returning?

I suspect what you really want to do is rather

    if xxx:
        newobj = type.__new__(cls)
        newobj.foo = 'foo'
        newobj.bar = 'bar'
        return newobj
    else ...etc etc...

altering the _instance_ and not the _class_ itself.


Alex


From duncan.booth at invalid.invalid  Sat Mar 10 12:50:32 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Mar 2007 17:50:32 GMT
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
Message-ID: <Xns98EFB589C63E9duncanbooth@127.0.0.1>

"Jack" <nospam at invalid.com> wrote:

> This is a naive question:
> 
> "%u" % -3
> 
> I expect it to print 3. But it still print -3.

Internally it uses the C runtime to format the number, but if the number 
you ask it to print unsigned is negative it uses %d instead of %u. I have 
no idea if it is actually possibly to get a different output for %d versus 
%u.

> 
> Also, if I have an int, I can convert it to unsigned int in C:
>    int i = -3;
>    int ui = (unsigned int)i;
> 
> Is there a way to do this in Python? 
> 
Depeneding on how exactly you want it converted:

   i = -3
   ui = abs(i)
   print ui
   ui = (i & 0xffff) # for 16 bit integers
   print ui
   ui = (i & 0xffffffff) # for 32 bit integers
   print ui
   ui = (i & 0xffffffffffffffff) # for 64 bit integers
   print ui
   ui = (i & 0xffffffffffffffffffffffffffffffff) # for 128 bit integers
   print ui

which gives the following output:

3
65533
4294967293
18446744073709551613
340282366920938463463374607431768211453

There isn't a unique way to convert a Python integer to an unsigned value 
which is why the %u format string cannot do anything other than print the 
value. Personally I'd have expected the Python one to either print the 
absolute value or throw an exception, but I guess making it an alias for %d 
kind of makes sense as well.


From Marko.Cain.23 at gmail.com  Wed Mar 28 18:38:45 2007
From: Marko.Cain.23 at gmail.com (Marko.Cain.23 at gmail.com)
Date: 28 Mar 2007 15:38:45 -0700
Subject: how can I clear a dictionary in python
Message-ID: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>

Hi,

I create a dictionary like this
myDict = {}

and I add entry like this:
myDict['a'] = 1
but how can I empty the whole dictionary?

Thank you.



From radek.svarz at gmail.com  Tue Mar 27 04:39:05 2007
From: radek.svarz at gmail.com (Radek)
Date: 27 Mar 2007 01:39:05 -0700
Subject: fetch html page via isa proxy
In-Reply-To: <1174942302.782922.85730@r56g2000hsd.googlegroups.com>
References: <1174930197.366764.102320@y66g2000hsf.googlegroups.com>
	<1174942302.782922.85730@r56g2000hsd.googlegroups.com>
Message-ID: <1174984745.357113.57800@y80g2000hsf.googlegroups.com>

> So you have already tried NTLM Authorization Proxy Server?http://ntlmaps.sourceforge.net/
> This used to work fine for me but that was at least 3-4 years ago.

Actually NTLM proxy server works for most intranet addresses. Not for
the outside Internet ones, though.

Radek



From chimalus at gmail.com  Fri Mar 23 21:18:51 2007
From: chimalus at gmail.com (jd)
Date: 23 Mar 2007 18:18:51 -0700
Subject: creating "jsp-like" tool with python
Message-ID: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>

I'd like to create a program that takes files with "jsp-like" markup
and processes the embedded code (which would be python) to produce the
output file.  There would be two kinds of sections in the markup file:
python code to be evaluated, and python code that returns a value that
would be inserted into the output.

This seems like it would be straightforward in python, and maybe
there's even a library that I could use for this, but as a newbie to
Python, I don't know the landscape very well.  I am not looking for a
big framework, just something small and simple that will do just this
job.  Suggestions or pointers would be greatly appreciated.

Thanks...

-- jeff



From adamgarstang at googlemail.com  Fri Mar  2 17:31:56 2007
From: adamgarstang at googlemail.com (Adam)
Date: 2 Mar 2007 14:31:56 -0800
Subject: New to Tkinter GUI building
In-Reply-To: <op.tojze6nkrqur0o@eb.pragmadev>
References: <1172695675.279652.98920@a75g2000cwd.googlegroups.com>
	<CfmFh.6986$_73.1105@newsread2.news.pas.earthlink.net>
	<1172701393.612661.193690@m58g2000cwm.googlegroups.com>
	<oXDFh.7737$tD2.2742@newsread1.news.pas.earthlink.net>
	<1172779300.546330.140120@h3g2000cwc.googlegroups.com>
	<op.tojze6nkrqur0o@eb.pragmadev>
Message-ID: <1172874716.404832.75670@v33g2000cwv.googlegroups.com>

Thanks for the reply, will work with this tomorrow.

Adam



From inyeol.lee at siliconimage.com  Fri Mar  9 14:27:22 2007
From: inyeol.lee at siliconimage.com (Inyeol Lee)
Date: Fri, 9 Mar 2007 11:27:22 -0800
Subject: Best place for a function?
In-Reply-To: <f1aa6d810703071427g4735f009m579b807aa261fe49@mail.gmail.com>
References: <f1aa6d810703071427g4735f009m579b807aa261fe49@mail.gmail.com>
Message-ID: <20070309192722.GC3030@siliconimage.com>

On Wed, Mar 07, 2007 at 05:27:04PM -0500, Sergio Correia wrote:
> I'm writing a class, where one of the methods is kinda complex. The
> method uses a function which I know for certain will not be used
> anywhere else. This function does not require anything from self, only
> the args passed by the method.
> 
> Where should I put the function?

Use staticmethod. It's a normal function with class namespace.

--Inyeol


From fabio.fzero at gmail.com  Wed Mar 14 14:45:45 2007
From: fabio.fzero at gmail.com (Fabio FZero)
Date: 14 Mar 2007 11:45:45 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
Message-ID: <1173897945.663660.13290@y80g2000hsf.googlegroups.com>

On Mar 14, 9:37 am, "tereglow" <tom.rectenw... at eglow.net> wrote:
> Hello all,
>
> I come from a shell/perl background and have just to learn python.  To
> start with, I'm trying to obtain system information from a Linux
> server using the /proc FS.  For example, in order to obtain the amount
> of physical memory on the server, I would do the following in shell:
>
> grep ^MemTotal /proc/meminfo | awk '{print $2}'
>
> That would get me the exact number that I need.  Now, I'm trying to do
> this in python.  Here is where I have gotten so far:
>
> memFile = open('/proc/meminfo')
> for line in memFile.readlines():
>     print re.search('MemTotal', line)
> memFile.close()
>
> I guess what I'm trying to logically do is... read through the file
> line by line, grab the pattern I want and assign that to a variable.
> The above doesn't really work, it comes back with something like
> "<_sre.SRE_Match object at 0xb7f9d6b0>" when a match is found.

Ok, two things:

1. You don't need the .readlines() part. Python can iterate over the
file object itself.
2. You don't need the re module for this particular situation; you
could simply use the 'in' operator.

You could write it like this:

memFile = open('/proc/meminfo')
for line in memFile:
    if 'MemTotal' in line: print line
memFile.close()

[]s
FZero



From mail at microcorp.co.za  Thu Mar  1 01:16:19 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 1 Mar 2007 08:16:19 +0200
Subject: Writing an interpreter for language similar to python!!
References: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
Message-ID: <022301c75bca$1fe0dc20$03000080@hendrik>

"luvsat" <luv.urs at gmail.com> wrote:


> Hello all,
>
> I am new to python and working on a project that involves designing a
> new language. The grammar of the language is very much inspired from
> python as in is supports nearly all the statements and expressions
> that are supported by python.

8<-----------------------------

This post begs the following questions:

- Why make a new language, when
- It is going to be an inferior subset of Python -
- What can the motivation be to do this instead of contributing to the python
effort?

Dont forget about GNU Bison, if you persist...

- Hendrik






From mail at razor.dk  Sun Mar  4 04:35:18 2007
From: mail at razor.dk (Christian Joergensen)
Date: Sun, 04 Mar 2007 10:35:18 +0100
Subject: Python FTP server down
References: <nSmGh.5295$P47.3241@newssvr22.news.prodigy.net>
Message-ID: <87649hbbc9.fsf@jamie.razor.dk>

John Nagle <nagle at animats.com> writes:

> "ftp://ftp.python.org/pub/" is returning "Connection Refused" today.

True.

> I need FTP access to download onto a colocated server.

Is HTTP firewalled? If you have SSH-access, you could just do the HTTP 
download at your workstation and scp/sftp it to the remote server.

-- 
Christian Joergensen | Linux, programming or web consultancy
http://www.razor.dk  |     Visit us at: http://www.gmta.info


From garylinux at gmail.com  Wed Mar  7 12:56:04 2007
From: garylinux at gmail.com (garylinux at gmail.com)
Date: 7 Mar 2007 09:56:04 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4739.1173248516.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<mailman.4739.1173248516.32031.python-list@python.org>
Message-ID: <1173290164.211784.183290@p10g2000cwp.googlegroups.com>

> package_name/
>      package_pre.py - contains globals for the package
>      component_a.py    - a useful-sized collection of functionality
>      component_b.py    - another
>      component_c.py    - another
>      package_post.py   - stuff that relies on the prior stuff
>      __init__.py       - or you can put the "post" stuff here
>
> Then __init__.py contains something like:
>
> from package_pre import *
> from component_a import *
> from component_b import *
> from component_c import *
> from package_post import *
>
> Anansi Spaceworkshttp://www.AnansiSpaceworks.com

Thank you! That is by far the clearest I have ever seen that
explained.
I saved it and Sent it on to a friend that is learning python.



From aleax at mac.com  Mon Mar 26 10:39:55 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 26 Mar 2007 07:39:55 -0700
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
Message-ID: <1hvknm0.ph0nmh4ucf31N%aleax@mac.com>

Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:
   ...
> > So I'ld suggest to start with downloading the Enthought edition of Python,
> > and you can judge for yourself within 10 minutes,
> > if it's fast enough.
> >
> > cheers,
> > Stef Mientki
> 
> Is there a mac version??

<http://download.enthought.com/MacEnthon/ReadMe.html> but it's self
labeled as "0.1 Test Release" i.e. somewhat preliminary; it claims to
support only Panther (10.3) and its 2.3.0 Python (no claims for Tiger,
10.4, and its 2.3.5 Python, nor for other Python Mac istalls yet).

If you're just trying to learn and check things out, it might be better
to get a more recent Python from python.org (2.5 or 2.4.4) and the
various other packages as and when you need them (you can use the
MacEnthon list as a guide:-).  You'll need a C compiler to be sure you
can install any package from sources -- Apple's XCode includes gcc, it's
free, and it's the safest choice (but it's a HUGE download, as it comes
with a lot of stuff -- I don't think Apple offers a simple way to
install "just" gcc and minimal supporting tools).


Alex


From aspineux at gmail.com  Fri Mar 30 08:44:27 2007
From: aspineux at gmail.com (aspineux)
Date: 30 Mar 2007 05:44:27 -0700
Subject: make RE more cleaver to avoid inappropriate :
	sre_constants.error: redefinition of group name
In-Reply-To: <1175206399.602730.174360@r56g2000hsd.googlegroups.com>
References: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
	<1175206399.602730.174360@r56g2000hsd.googlegroups.com>
Message-ID: <1175258667.190955.158220@y80g2000hsf.googlegroups.com>

On 30 mar, 00:13, "Paddy" <paddy3... at googlemail.com> wrote:
> On Mar 29, 3:22 pm, "aspineux" <aspin... at gmail.com> wrote:
>
>
>
> > I want to parse
>
> > 'foo at bare' or '<foot at bar>' and get the email address foo at bar
>
> > the regex is
>
> > r'<\w+@\w+>|\w+@\w+'
>
> > now, I want to give it a name
>
> > r'<(?P<email>\w+@\w+)>|(?P<email>\w+@\w+)'
>
> > sre_constants.error: redefinition of group name 'email' as group 2;
> > was group 1
>
> > BUT because I use a | , I will get only one group named 'email' !
>
> > Any comment ?
>
> > PS: I know the solution for this case is to use  r'(?P<lt><)?(?P<email>
> > \w+@\w+)(?(lt)>)'
>
> use two group names, one for each alternate form and if you are not
> concerned with whichever matched do something like the following:
>
The problem is the way I create this regex :-)

regex={}
regex['email']=r'(?P<email1>\w+@\w+)'

path=r'<%(email)s>|%(email)s' % regex

Once more, the original question is :
Is it normal to get an error when the same id used on both side of a
|

>
>
> >>> s1 = 'foo at bare'
> >>> s2 = '<foo at bare>'
> >>> matchobj = re.search(r'<(?P<email1>\w+@\w+)>|(?P<email2>\w+@\w+)', s1)
> >>> matchobj.groupdict()['email1'] or matchobj.groupdict()['email2']
> 'foo at bare'
> >>> matchobj = re.search(r'<(?P<email1>\w+@\w+)>|(?P<email2>\w+@\w+)', s2)
> >>> matchobj.groupdict()['email1'] or matchobj.groupdict()['email2']
> 'foo at bare'
>
> - Paddy.




From test.07 at gmail.com  Thu Mar  8 12:25:02 2007
From: test.07 at gmail.com (test.07 at gmail.com)
Date: 8 Mar 2007 09:25:02 -0800
Subject: Python threading
Message-ID: <1173374702.195390.90550@s48g2000cws.googlegroups.com>

I am wondering what happens to a thread in python in relation to
win32com extensions.

If I create a new thread, that uses the Dispatch method from win32com,
what happens to the memory allocated in that thread when the thread is
done. Will the Dispatch release the memory it created, or will the
memory remain?

The problem rises from the fact that Dispatch does not seem to release
memory correctly every time. If I include the commands in a thread by
themselves, will the thread clean up ALL memory it used after it is
done?

I did try the pythoncom.CoUnitialize() to release memory, but it
doesn't seem to work (it does work about 30-45 seconds after the
command is run).

Any input is greatly appreciated (on the thread issue or how to use
the pythoncom.CoUnitiliaze() to make it release memory right away).

Thank you in advance!



From john106henry at hotmail.com  Fri Mar  2 10:02:39 2007
From: john106henry at hotmail.com (John Henry)
Date: 2 Mar 2007 07:02:39 -0800
Subject: Matplotlib axes label
In-Reply-To: <1172815638.950663.198040@t69g2000cwt.googlegroups.com>
References: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>
	<1172814815.385543.180040@j27g2000cwj.googlegroups.com>
	<1172815638.950663.198040@t69g2000cwt.googlegroups.com>
Message-ID: <1172847759.727020.281300@p10g2000cwp.googlegroups.com>

On Mar 1, 10:07 pm, "John Henry" <john106he... at hotmail.com> wrote:
> On Mar 1, 9:53 pm, attn.steven.... at gmail.com wrote:
>
>
>
> > On Mar 1, 3:10 pm, "John Henry" <john106he... at hotmail.com> wrote:
>
> > > I've been asking this question at the matplotlib user list and never
> > > gotten an answer.  I am hoping that there are matplotlib users here
> > > that can help.
>
> > > My problem with matplotlib's way of handling axes label is illustrated
> > > by this example:
>
> > >http://www.scipy.org/Cookbook/Matplotlib/MulticoloredLine
>
> > > Notice that the y-axis goes from (-1.1, 1.1) but the first label is at
> > > -1.0.
>
> > (snipped)
>
> > > Is there a way to force the label to start at -1.1 instead of -1.0?
>
> > > Thanks,
>
> > You can try adjusting the labels and ticks
> > using matplotlib.ticker.
>
> > To the example you cited, one can add
>
> > from matplotlib.ticker import MultipleLocator, FormatStrFormatter
>
> > # ...
>
> > minorLocator = MultipleLocator(0.1)
> > minorFormattor = FormatStrFormatter('%0.1f')
> > ax.yaxis.set_minor_locator(minorLocator)
> > ax.yaxis.set_minor_formatter(minorFormattor)
>
> > show()
>
> > --
> > Hope this helps,
> > Steven
>
> Thank you for the response.  Yes, adding those lines did work.
>
> But what exactly is going on here?  Why would adding these two lines
> works?
>
> Thanks,


Okay, I played with the ticker formater and locator routines.
Unfortunately, it doesn't help.  The locator sets the major value and
the formatter determines how the axes label is formatted.  It doesn't
gurantee that the first label starts at the origin.  Half of my plots
works, and half of them doesn't.



From grante at visi.com  Mon Mar 12 11:21:57 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 Mar 2007 15:21:57 -0000
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<12v3ksihos7uj7a@corp.supernews.com>
	<1173477047.467568.298090@p10g2000cwp.googlegroups.com>
	<2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<1173488215.913014.130190@h3g2000cwc.googlegroups.com>
	<mailman.4896.1173517512.32031.python-list@python.org>
	<12v8vk7sabb2i84@corp.supernews.com>
	<mailman.4955.1173678039.32031.python-list@python.org>
Message-ID: <12vas0lj1u2ti78@corp.supernews.com>

On 2007-03-12, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
> "Grant Edwards" <g...te at visi.com> wrote:

>> >> Oh, thanks for the advice then. And as for Grant..look forward to
>> >> seeing more of your posts.
>> >
>> > YOW! - some recognition at last!
>> 
>> :)
>> 
>> I see somebody pays attention to sigs -- which, BTW, are old quotes
>> from the Zippy the Pinhead comic strip. www.zippythepinhead.com
>
> Thanks for that - I was wondering where you got hold of the skewed
> thinking which I enjoy reading so much.

I grabbed the file full of quotes from the emacs distribution
back around 1990, so that's why the pop-culture references are
a bit dated.  I don't know if emacs still includes Zippy quotes
(of if they've been updated), but you used to be able to do
"esc-X yow" and emacs would show you a random Zippy quote.

-- 
Grant Edwards                   grante             Yow!  Jesus is my
                                  at               POSTMASTER GENERAL...
                               visi.com            


From ptmcg at austin.rr.com  Fri Mar 23 22:39:53 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Mar 2007 19:39:53 -0700
Subject: Multi-line strings with formatting
In-Reply-To: <mailman.5524.1174674566.32031.python-list@python.org>
References: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>
	<1174669850.3450.40.camel@dot.uniqsys.com>
	<mailman.5524.1174674566.32031.python-list@python.org>
Message-ID: <1174703993.715410.173780@e65g2000hsc.googlegroups.com>

On Mar 23, 1:25 pm, Steve Holden <s... at holdenweb.com> wrote:
> Carsten Haese wrote:
> > On Fri, 2007-03-23 at 09:54 -0700, gburde... at gmail.com wrote:
> >> When constructing a particularly long and complicated command to be
> >> sent to the shell, I usually do something like this, to make the
> >> command as easy as possible to follow:
>
> >> commands.getoutput(
> >>     'mycommand -S %d -T %d ' % (s_switch, t_switch)   +
> >>     '-f1 %s -f2 %s '         % (filename1, filename2) +
> >>     '> %s'                   % (log_filename)
> >>     )
>
> >> Can anyone suggest a better way to construct the command, especially
> >> without the "+" sign at the end of each line (except the last) ? If I
> >> take out the "+", then I need to move all the variables to the end, as
> >> so:
>
> >> commands.getoutput(
> >>     'mycommand -S %d -T %d '
> >>     '-f1 %s -f2 %s '
> >>     '> %s'
> >>     % (s_switch, t_switch, filename1, filename2, log_filename)
> >>     )
>
> >> or:
>
> >> commands.getoutput(
> >>     '''mycommand -S %d -T %d \
> >>     -f1 %s -f2 %s \
> >>     > %s'''
> >>     % (s_switch, t_switch, filename1, filename2, log_filename)
> >>     )
>
> > You get the best of both worlds, i.e. one big multiline string with
> > in-line parameters, by using a mapping:
>
> > commands.getoutput(
> >    '''mycommand -S %(s_switch)d -T %(t_switch)d \
> >     -f1 %(filename1)s -f2 %(filename2)s \
> >     > %(log_filename)s'''
> >     % locals() )
>
> > Of course I'm assuming that s_switch etc. are local variables. If
> > they're not, well, they ought to be.
>
> > -Carsten
>
> If that doesn't suit then build a list:
>
> l = [
>      'mycommand -S %d -T %d ' % (s_switch, t_switch)   ,
>      '-f1 %s -f2 %s '         % (filename1, filename2) ,
>      '> %s'                   % (log_filename)
> ]
>
> and then return commands.getoutput("".join(l)).
>
> regards
>   Steve
>
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com- Hide quoted text -
>
> - Show quoted text -

This list might be even simpler to follow:

l = [
     'mycommand',
     '-S', s_switch,
     '-T', t_switch,
     '-f1', filename1,
     '-f2', filename2,
     '>', log_filename
    ]
cmd = " ".join(l)

(and I'm glad I'm not the only one who uses 'l' for a scratch list
variable...)

-- Paul




From nagle at animats.com  Tue Mar 13 19:20:15 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 13 Mar 2007 23:20:15 GMT
Subject: help!! *extra* tricky web page to extract data from...
In-Reply-To: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
Message-ID: <PkGJh.6104$uo3.919@newssvr14.news.prodigy.net>

seberino at spawar.navy.mil wrote:
> How extract the visible numerical data from this Microsoft financial
> web site?
> 
> http://tinyurl.com/yw2w4h
> 
> If you simply download the HTML file you'll see the data is *not*
> embedded in it but loaded from some other file.
> 
> Surely if I can see the data in my browser I can grab it somehow right
> in a Python script?
> 
> Any help greatly appreciated.

    Been there, done that, years ago.  Try this:

http://www.downside.com/cgi/testfinancialsextract.cgi?url=http://www.sec.gov/Archives/edgar/data/886158/0001104659-06-034196.txt

That will get you the data you're looking for.
If you want to try other companies, start at the query box on 
"http://www.downside.com".

The data is actually coming from the United States Securities and Exchange
Commission's EDGAR web site, where companies are required to file their
financial statements.  The filings are intended to be read by humans, but
it's possible to parse many filings mechanically.  They're supposed to be
in HTML 3.2, but this isn't enforced.

There are many EDGAR parsers, some better than ours.  To do a really good one,
you have to license a patent from Price Waterhouse.  Try 
"http://www.10kwizard.com/", which has an API for retrieving this info.
It's not free.

				John Nagle


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 10 09:12:33 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 10 Mar 2007 15:12:33 +0100
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4813.1173388535.32031.python-list@python.org>
	<G1mIh.25$qe5.19@trnddc05>
Message-ID: <55fsm8F24qo1iU1@mid.individual.net>

Alan Isaac wrote:

> What ambiguity?
> Tabs are *less* ambiguous.
> One tab character is one level of indentation.
>
> I have never seen this violated.

Not quite a proof ...
 
> Users of spaces cannot even count
> on shared code being 4 rather than 8 spaces.

You also can't count on proper TAB code.
 
> Even though tabs when on this score, face it,
> in the end it is pure preference.  There is no
> "right" answer (even for emacs users).  ;-)

ACK.

> And my actual question remains unanswered...

(--indent-string or changing a config file doesn't work for you? I
have the impression it was answered.)

Regards,


Bj?rn

-- 
BOFH excuse #364:

Sand fleas eating the Internet cables



From good_online_jobs at yahoo.com  Mon Mar 19 06:57:38 2007
From: good_online_jobs at yahoo.com (good_online_jobs)
Date: 19 Mar 2007 03:57:38 -0700
Subject: Looking for a job?
Message-ID: <1174301858.673606.268320@y66g2000hsf.googlegroups.com>

Free. Find a Job here now--> http://www.jobbankdata.com



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 20:50:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 22:50:09 -0300
Subject: Unexpected behavior of list of list
References: <1173490209.398081.200420@h3g2000cwc.googlegroups.com>
Message-ID: <op.tox91vp4x6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 22:30:09 -0300, kghose <kaushik.ghose at gmail.com>  
escribi?:

> The following code
>
> listoflists = [[]]*2
> listoflists[0].append(1)
>
> appends(1) to both listoflists[0] and listoflists[1] (which I did not
> expect)

See latest posts on this list, or read the FAQ.

-- 
Gabriel Genellina



From aleax at mac.com  Sun Mar 11 14:58:15 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 11:58:15 -0700
Subject: Python in a Nutshell v2.5 shortcomings
References: <mailman.4836.1173410475.32031.python-list@python.org>
	<1huohke.qr9btd1mo633vN%aleax@mac.com>
	<55cshjF23meg4U3@mid.individual.net>
Message-ID: <1hut7a5.6w20i31xi9qycN%aleax@mac.com>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>
wrote:

> Alex Martelli wrote:
> 
> > I do know that the 2nd edition of Python in a Nutshell tries to do
> > so, but falls quite a bit short on a number of important new
> > additions to the library
> 
> Which, if I may ask?

For example, all I say about ctypes is that it's scheduled to be added
to the standard library in Python 2.5, plus the URL to theller's pages
on it; it's surely worth at least the 5 pages I devoted to covering
Pyrex (considering that the latter is not in the standard library), not
just 5 lines:-(.  Similarly, ElementTree is essentially just mentioned,
not really covered (while it would deserve the 10-12 pages that I
instead used to cover minidom), and SQLite gets less than a page
(probably enough for elementary use, since the DBAPI _is_ well covered,
but 2-3 pages with advanced issues and a relatively long examples would
have been better).

You could say, for 2.5 coverage, the book is missing about 20 pages it
should have -- not all that much, in comparison to the 700 pages it does
have, but not ideal (as for the "new compiler stuff" -- modules
compiler, parser, symbol, etc -- I'm not even sure how long it would
take to do them justice... perhaps another 20-30 pages... but perhaps
those subjects are a bit too exoteric to keep expanding the book!-).


Alex


From spedrosa at gmail.com  Sun Mar 25 17:50:32 2007
From: spedrosa at gmail.com (Stephen Eilert)
Date: 25 Mar 2007 14:50:32 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <1174857800.421722.218190@e65g2000hsc.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
	<eu6k3n$uk6$03$1@news.t-online.com>
	<1174857800.421722.218190@e65g2000hsc.googlegroups.com>
Message-ID: <1174859432.355892.110520@l77g2000hsb.googlegroups.com>

On Mar 25, 6:23 pm, "gslm" <slm_gu... at hotmail.com> wrote:
> Please, can you read again?
> Yes, I understand that in phyton interpreter, i can't call phyton
> command.Thanks...
>
> But how can i run '.py' files from this command line?I wanted to use
> the phyton command for this.
>
> When i click a py extended file, for example calendar.py in lib
> directory, file opens, then suddenly close,except graphical ones.Why?
> How can i see the results?
>
> And where can i learn which library must i import for whic class?
>
> Sorry, i ask much:(But after learning these starting knowledeges, i
> read tutorials, manuals etc.
> But now i haven't found my answers yet.
> Regards...

For god's sake. It's PYTHON, not PHYTON.

Use IDLE and run your files from there. That way you won't have to
mess with the hideous windows console.

However, if you really want to use the windows console, keep in mind
that it will always close automatically when the program ends. That is
true for Python, C, whatever, unless it was open before. So, Start-
>run, type "cmd" then run python filename.py. If that does not work,
it's because the path is not set correctly.

And that's probably because you keep mispelling Python. See below:

" But I'm sorry.I haven't understood what i must do for ruunnig phyton
command.I delete path from proportiesof my computer.Then i open
command line of phyton.But when i write phyton these view below:
Traceback<most recent call last>:
File "<stdin>"; line 1 in <module>
NameError: name phyton is not defined "
                ^^^^^^^

Obviously, "Phyton" will never be defined.


Stephen






From mensanator at aol.com  Mon Mar 12 15:43:31 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 12 Mar 2007 12:43:31 -0700
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1173674990.270916.255920@t69g2000cwt.googlegroups.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
	<1173578899.046177.104890@j27g2000cwj.googlegroups.com>
	<7x6498le9v.fsf@ruckus.brouhaha.com>
	<1173602405.956438.140590@c51g2000cwc.googlegroups.com>
	<1hutxsj.12uwks7mkbcqmN%aleax@mac.com>
	<1173674990.270916.255920@t69g2000cwt.googlegroups.com>
Message-ID: <1173728611.804128.282760@h3g2000cwc.googlegroups.com>

On Mar 11, 11:49 pm, "John Machin" <sjmac... at lexicon.net> wrote:
> On Mar 12, 3:19 pm, a... at mac.com (Alex Martelli) wrote:
>
> > Paul McGuire <p... at austin.rr.com> wrote:
> > > will be.  For instance, when working with data from 0 to 100 and
> > > looking for frequencies by decade, you can initialize the histogram-
> > > dict with:
>
> > > for i in range(10):
> > >     histodict[i] = 0
>
> > A better way, of course (also saving the histodict = {} which you didn't
> > mention but surely intended) would be:
>
> >     histodict = dict.fromkeys(range(10), 0)
>
> > In Python, in general, the more conceptually compact, direct, simple and
> > higher-abstraction approach tends to be faster as well, BTW.
>
> That's so true, especially if it's matched to the problem space, isn't
> too new, and doesn't need looking up in the docs :-)
>
> Python 2.1.3 (#35, Apr  8 2002, 17:47:50) [MSC 32 bit (Intel)] on
> win32
> Type "copyright", "credits" or "license" for more information.>>> histodict = dict.fromkeys(range(10), 0)
>
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'dict' is not defined>>> histolist = [0] * 10
> >>> histolist[3] += 1
> >>> histolist
>
> [0, 0, 0, 1, 0, 0, 0, 0, 0, 0]

In defense of my original if:else: idiom, I'll point
out that there may be more to be done when the key is
absent than simply creating a new one and initializing it.

Also, a dictionary doesn't need an integer index, so I can
create bins such as '2.01','2.02',etc.

And in some cases, it's not known what the range of the
keys will be making it difficult to pre-allocate the list.

And yes, the empty buckets will need to be created for
graphing purposes, but that can be done after the test
has completed so that the only empty buckets that need
be created are those between the outliers.

>
>
>
> Cheers,
> John




From vafada at gmail.com  Tue Mar 20 11:06:28 2007
From: vafada at gmail.com (Mark Bryan Yu)
Date: 20 Mar 2007 08:06:28 -0700
Subject: Punit v 0.1 - Python CD ripper
Message-ID: <1174403188.206344.45950@y80g2000hsf.googlegroups.com>

Here's the initial release of my personal open source project to
create a Python CD ripper in Linux.

Punit is a Audio CD ripper for Linux using cdparanoia, LAME and
CDDB.py (http://cddb-py.sourceforge.net/)

http://www.programmingmind.com/bryan/punit.html



From attn.steven.kuo at gmail.com  Thu Mar 29 11:24:16 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 29 Mar 2007 08:24:16 -0700
Subject: Creating a new data structure while filtering its data origin.
In-Reply-To: <mailman.5727.1175117350.32031.python-list@python.org>
References: <mailman.5727.1175117350.32031.python-list@python.org>
Message-ID: <1175181855.998683.41650@l77g2000hsb.googlegroups.com>

On Mar 28, 1:44 pm, <m... at fibertel.com.ar> wrote:
> Hi everyone.
>
> I'm trying to work with very simple data structures but I'm stuck in the very first steps. If someone has the luxury of a few minutes and can give an advice how to resolve this, I'll really appreciate it.
>
> 1- I have a list of tuples like this:
> lista= [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2), (168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203, 141, 1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568, 142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]
> and I want to end with a dict like this:
> {141: {1: [203, 213, 201], 2: [168, ], 3: [162, ]}, 142: {1: [503, 513, 501], 2: [568, ], 4: [562, ]}}


(snipped)

I think you can use, with python 2.5, defaultdict for
this.  I only have access to 2.4.4 here, so my facsimile
is:

class defaultd(dict):
    def __getitem__(self, k):
        if k not in self:
            self[k] = defaultd()
        return dict.__getitem__(self, k)

lista = [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2),
(168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203,
141,
1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568,
142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]

dd = defaultd()

for value, outerkey, innerkey in lista:
    li = dd[outerkey].setdefault(innerkey, [])
    if value not in li:
        li.insert(0, value)
        # or, li.append(value) if you want to reverse order

print dd

I happen to like the "autovivification" feature
found in perl and was pleased to see defaultdict in
python 2.5.  OTOH, python programmers more experienced
than I might see this and run away screaming.


--
Hope this helps,
Steven



From chrisgarland67 at gmail.com  Thu Mar  1 16:17:45 2007
From: chrisgarland67 at gmail.com (Chris Garland)
Date: 1 Mar 2007 13:17:45 -0800
Subject: Unpacking problem
Message-ID: <1172783865.479377.42790@h3g2000cwc.googlegroups.com>

What's wrong here?

>>> from struct import unpack

I can unpack an unsigned char
>>> unpack('B','\x90')
(144,)

I can unpack a short
>>> unpack('h','\x06\x00')
(6,)

But an unsigned char & a short give me this
>>> unpack('Bh','\x90\x06\x00')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
struct.error: unpack str size does not match format
>>>



From aahz at pythoncraft.com  Tue Mar 20 13:34:12 2007
From: aahz at pythoncraft.com (Aahz)
Date: 20 Mar 2007 10:34:12 -0700
Subject: Wanted:  a python24 package for Python 2.3
References: <45FFFEB6.2080403@pytex.org> <1hv9nvz.1gpov9wh4av3fN%aleax@mac.com>
Message-ID: <etp5uk$nca$1@panix3.panix.com>

In article <1hv9nvz.1gpov9wh4av3fN%aleax at mac.com>,
Alex Martelli <aleax at mac.com> wrote:
>
>For subprocess specifically, see
><http://www.lysator.liu.se/~astrand/popen5/> .  I don't think anybody's
>ever packaged up ALL the new stuff as you require.

Oh, good that web page came back.  (When we were down to the wire on
_Python for Dummies_, it had been offline for more than a month, and I
had to decide whether to include it, and I did.)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From duncan.booth at invalid.invalid  Thu Mar 22 05:03:45 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Mar 2007 09:03:45 GMT
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<mailman.5432.1174527485.32031.python-list@python.org>
	<1174528562.192439.84480@l77g2000hsb.googlegroups.com>
Message-ID: <Xns98FB5C293918duncanbooth@127.0.0.1>

"Virgil Dupras" <hardcoded.software at gmail.com> wrote:

> I think I see what Marcin means. The 'node' is changed too fast in the
> chain, and next is assigned to 'nextnode' instead of being assigned to
> node.

I can see why Marcin was confused. Many other languages assignment is an 
expression, so a=b=c is simply a=(b=c). In Python it isn't an expression, 
the chained assignment is a specific part of the syntax, so (as with 
chained comparisons) the semantics may be surprising to the uninitiated.

As a matter of interest do PyLint or PyChecker check for this situation 
(chained assignment where the target of an assignment is also a 
subexpression of a later assignment)?

Also it may be worth noting that unpacking has a similar behaviour:

   node, node.next = nextnode, nextnode

has the same result as the chained assignment: the RHS is a tuple and is 
fully evaluated before the assignment, but the LHS is not a tuple and the 
assignment happens strictly left to right with each assignment fully 
completed before proceeding to the next one.



From MonkeeSage at gmail.com  Sat Mar  3 20:17:59 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 17:17:59 -0800
Subject: portable Python ifconfig
In-Reply-To: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
References: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
Message-ID: <1172971079.137861.316170@h3g2000cwc.googlegroups.com>

On Mar 3, 3:38 pm, Bart Van Loon <bbb... at inGen.be> wrote:
> I'm looking for a portable (FreeBSD and Linux) way of getting typical
> ifconfig information into Python.

Here's a pure python version of the C extension, based on the recipes
you posted. In this version, the 'addr' key will not exist for a non-
existent / non-active interface.

import socket, fcntl, struct, platform

def _ifinfo(sock, addr, ifname):
    iface = struct.pack('256s', ifname[:15])
    info  = fcntl.ioctl(sock.fileno(), addr, iface)
    if addr == 0x8927:
        hwaddr = []
        for char in info[18:24]:
            hwaddr.append(hex(ord(char))[2:])
        return ':'.join(hwaddr)
    else:
        return socket.inet_ntoa(info[20:24])

def ifconfig(ifname):
    ifreq = {'ifname': ifname}
    infos = {}
    osys  = platform.system()
    sock  = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    if osys == 'Linux':
        # offsets defined in /usr/include/linux/sockios.h on linux 2.6
        infos['addr']    = 0x8915 # SIOCGIFADDR
        infos['brdaddr'] = 0x8919 # SIOCGIFBRDADDR
        infos['hwaddr']  = 0x8927 # SIOCSIFHWADDR
        infos['netmask'] = 0x891b # SIOCGIFNETMASK
    elif 'BSD' in osys: # ???
        infos['addr']    = 0x8915
        infos['brdaddr'] = 0x8919
        infos['hwaddr']  = 0x8927
        infos['netmask'] = 0x891b
    try:
        for k,v in infos.items():
            ifreq[k] = _ifinfo(sock, v, ifname)
    except:
        pass
    sock.close()
    return ifreq

ifc = ifconfig('ath0')
if ifc.has_key('addr'):
    print ifc

I'm pretty sure the offsets would be different for BSD, but I don't
have any BSD boxes to test on (looks like from a bit of googling that
you might need to look at /compat/linux/linux_ioctl.h for the offsets
on BSDs). I'll leave it to you to fill in the BSD stuff.

Regards,
Jordan



From scott.daniels at acm.org  Thu Mar  1 21:52:41 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 01 Mar 2007 18:52:41 -0800
Subject: Converting a c array to python list
In-Reply-To: <es66m4$cnr$1@inews.gazeta.pl>
References: <es66m4$cnr$1@inews.gazeta.pl>
Message-ID: <12uf4a1qj5uhu65@corp.supernews.com>

zefciu wrote:
> Hi!
> 
> I want to embed a function in my python application, that creates a
> two-dimensional array of integers and passes it as a list (preferably a
> list of lists, but that is not necessary, as the python function knows
> the dimensions of this array).  As I read the reference, I see, that I
> must first initialize a list object and then item-by-item put the values
> to the list.  Is there any faster way to do it?  And is it worth to
> implement?  The same problem is resolved in the current version by
> calling a smaller c function (that counts just one element of the array)
> many times.  Will it add much performance to the process?
> 
> zefciu

http://members.dsl-only.net/~daniels/Block.html

This will allow you to provide a python "View" onto your C data.
The view can be cut into a list of views as on_way or other_way below:
     ...
     view = block.View(...)
     stride = <<one dimension>>
     one_way = [view[n: n + stride] for n in range(0, len(view), stride)]
     other_way = [view[n::stride] for n in range(stride)]
     ...
One of these will give you row-major, and the other column-major access
to the live data in the C array.  If you don't want to see your program
data as it changes, you could Create a Block and fill it.  If you need
Python 2.4 or 2.5, you'll need to figure out how to build from sources
on Windows (I assume building from sources is otherwise "easy").

-- 
--Scott David Daniels
scott.daniels at acm.org


From carsten at uniqsys.com  Mon Mar 12 09:41:17 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Mon, 12 Mar 2007 09:41:17 -0400
Subject: number generator
In-Reply-To: <esvsvp$p6h$1@sea.gmane.org>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<esukru$1v1$1@news2.zwoll1.ov.home.nl>
	<mailman.4919.1173560418.32031.python-list@python.org>
	<esvepk$1cu$1@news3.zwoll1.ov.home.nl>  <esvsvp$p6h$1@sea.gmane.org>
Message-ID: <1173706877.3463.16.camel@dot.uniqsys.com>

On Sat, 2007-03-10 at 22:27 -0500, Terry Reedy wrote:
> "Anton Vredegoor" <anton.vredegoor at gmail.com> wrote in message 
> news:esvepk$1cu$1 at news3.zwoll1.ov.home.nl...
> | Terry Reedy wrote:
> |
> | > Partitioning positive count m into n positive counts that sum to m is a
> | > standard combinatorial problem at least 300 years old.  The number of 
> such
> | > partitions, P(m,n)  has no known exact formula [...]
> | [...] Steven pointed out that one can view the problem like this:
> |
> | 00010000100010100
> |
> | That would be [3,4,3,1,2]
> |
> | where the '1' elements are like dividing shutters that partition the row
> | of '0'. This means that the problem is reduced to permutations (albeit
> 
> If any of the 1s appear at the ends or together, then you would have 0s in 
> the partition, which is not allowed, as I understood the spec.

Correct, the OP's spec doesn't allow 0s, but the problem can be easily
transformed back and forth between positive partitions and non-negative
partitions. In order to partition M into N positive numbers, partition
(M-N) into N non-negative numbers and increase each part by 1.

There must be some other constraint on what P(M,N) means, or I just
solved a 300 year old problem.

-Carsten




From facundo at taniquetil.com.ar  Fri Mar 23 23:42:54 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Sat, 24 Mar 2007 03:42:54 +0000 (UTC)
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
Message-ID: <eu26nu$3e0$1@sea.gmane.org>

Bjoern Schliessmann wrote:


>> while True:
>>     line = file.readline()
>>     if len(line) == 0: break # EOF
>
> "one blank line" == "EOF"? That's strange. Intended?
>
> The most common form for this would be "if not line: (do
> something)".

"not line" and "len(line) == 0" is the same as long as "line" is a
string.

He's checking ok, 'cause a "blank line" has a lenght > 0 (because of
newline).


>> class FileRecord:
>>     def __init__(self, line):
>>         self.line = line
>
> What's this class intended to do?

Unless I understood it wrong, it's just an object that holds the line
inside.

Just OO purity, not practicality...

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From b.r.willems at gmail.com  Tue Mar 13 21:17:48 2007
From: b.r.willems at gmail.com (Bart Willems)
Date: Tue, 13 Mar 2007 21:17:48 -0400
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <mailman.5045.1173827319.32031.python-list@python.org>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
	<mailman.5045.1173827319.32031.python-list@python.org>
Message-ID: <SZHJh.38$07.36@newsfe12.lga>

John McMonagle wrote:
> Try it a different way:
> 
> while True:
>     hint = raw_input("\nAre you stuck? y/n: ")
>     hint = hint.lower()
>     if hint != 'y' and hint != 'n':
>         print "Please answer y or n"
>         continue
>     else:
>         break
> if hint == 'y':
>     do_your_hint_stuff()


I always try to stay away from 'negative' operators if possible, to 
improve readability:

while True:
    hint = raw_input('\nAre you stuck? y/n: ').lower()
    if hint = 'y' or hint = 'n':
       break
    else:
       print 'Please answer yes or no'


From kyosohma at gmail.com  Tue Mar 20 16:53:57 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 13:53:57 -0700
Subject: Exceptions when closing a file
In-Reply-To: <460048f7$0$752$426a74cc@news.free.fr>
References: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
	<1174413925.474168.152570@p15g2000hsd.googlegroups.com>
	<460048f7$0$752$426a74cc@news.free.fr>
Message-ID: <1174424037.805693.116310@d57g2000hsg.googlegroups.com>

On Mar 20, 4:26 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> kyoso... at gmail.com a ?crit :
>
>
>
> > On Mar 20, 12:25 pm, Steven D'Aprano
> > <s... at REMOVE.THIS.cybersource.com.au> wrote:
>
> >>Closing a file can (I believe) raise an exception. Is that documented
> >>anywhere? I've spent a lot of frustrating time trying to track this down,
> >>with no luck, which suggests that either my google-foo is weak or that it
> >>isn't documented. Is IOError the only exception it can raise?
>
> >>The only thing I have found is this:
>
> >>http://mail.python.org/pipermail/python-bugs-list/2004-November/02603...
>
> >>Out of curiosity, is there a simple way to demonstrate close() raising an
> >>exception that doesn't involve messing about with disk quotas?
>
> >>--
> >>Steven.
>
> > I've never had any problems closing a file. Maybe you need to flush it
> > before you close it?
>
> Usually, closing the file flushes the buffer. At least with buffered
> files, but that's the most common situation AFAICT.
>
> > Are you running threads that access the file in
> > ad hoc fashion or something else out of the ordinary? Is this some
> > sort of long running process writing a large file?
>
> Might just be that there's no more available storage space.

Very true...I was fishing for more information to be able to give a
more specific answer. And I was tired, so I didn't think of
everything. Good call, you guys!

Mike



From bbxx789_05ss at yahoo.com  Wed Mar 21 01:33:33 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 20 Mar 2007 22:33:33 -0700
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
Message-ID: <1174455213.882489.222170@d57g2000hsg.googlegroups.com>

No.



From jeba.ride at gmail.com  Tue Mar 27 10:33:27 2007
From: jeba.ride at gmail.com (Clement)
Date: 27 Mar 2007 07:33:27 -0700
Subject: Help in Placing Object in Memory
Message-ID: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>

I am newbie to Python...... i want to know something..........

can i place an object in disk instead of placing in Main Memory...?

If possible, can you please explain with some scripts...?

can two python script share a common object....?



From rpdooling at gmail.com  Thu Mar  1 15:14:43 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 1 Mar 2007 12:14:43 -0800
Subject: python equivalent of bash find
Message-ID: <1172780082.961223.222500@s48g2000cws.googlegroups.com>

I recently moved from XP to Linux, but would like to use Python
whenever possible.

line from bash script:

find ~/Mail -xdev -type f \( -mtime 0 -or -mtime 1 \) -exec cp -aPvu
"{}" /backup-dest \;

What modules would I use to accomplish this in Python? Or any other
Python tricks to copy or backup all files modified today?

Thank you,

rd

"You can't have everything. Where would you put it?"--Steven Wright



From esj at harvee.org  Sat Mar 24 19:21:26 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Sat, 24 Mar 2007 19:21:26 -0400
Subject: fine grain logging cotrol
In-Reply-To: <W2hNh.16007$tD2.7813@newsread1.news.pas.earthlink.net>
References: <mailman.5519.1174663861.32031.python-list@python.org>	<eu12qc$1n5$00$1@news.t-online.com>	<eu1kls$og8$1@sea.gmane.org>	<op.tpny4gmex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>	<mailman.5540.1174699389.32031.python-list@python.org>	<_P1Nh.15765$tD2.11562@newsread1.news.pas.earthlink.net>	<mailman.5551.1174750211.32031.python-list@python.org>	<GffNh.130835$_73.89420@newsread2.news.pas.earthlink.net>	<mailman.5561.1174769484.32031.python-list@python.org>
	<W2hNh.16007$tD2.7813@newsread1.news.pas.earthlink.net>
Message-ID: <eu4bpu$ee4$1@sea.gmane.org>

Dennis Lee Bieber wrote:

> 	I've never resorted to the debugger -- it's always been faster for
> me to just wolf-fence* code with print statements...

depends on the situation for me.  normally I use log statements that 
turn on or off based on predicates (now I need to figure out how to 
handle a SIGUSR1 to reload the who-logs info)  hence this quest.  when 
done it's going into my rcsoc (random cross section of code) collection 
which I'll publish one of these days.  Also, I need to see if I can make 
this lower overhead by pre computing as much of the predicate term as 
possible and perform the test before calling a log statement.   I put in 
*lots* of log statements but leave most of them off until needed. 
different form of wolf fence.

> 	Could you possibly be confusing the execution of the "def"
> statement... Remember, in Python "class" and "def" are executable
> statements themselves. That is, what you are seeing during __new__ is
> the execution of the statement that defines the get_logger method, NOT a
> call of get_logger itself.

I know def executes.  forth plays similar games and I spent a *lot* of 
time in the guts of forth.   With python, I'm just not familiar enough 
with what goes on beneath the sheets.

> 
> 	Ah.. Okay... the wolf howled... Looking deeper at the code, it is
> not a direct call to get_logger, but an indirect one via the dictionary
> entry.

right.  still not comfortable the property call.  if I'm reading the 
right docs, the first arg is a get method and I'm not sure how a logger 
fills that need.

> 
> 	classdict["_Felis.alpha__logger"]
> 
> 	None the less, your posted code did have too many _ on the init,
> meaning the initialization never took place, AND the references to
> "test_names" needs to be prefixed with "self."

my most common brain fades.  I also miss tt/ttt, ss/sss, 1l and 
probably a few others.  I sometimes think IDE's should have a "did you 
mean" function to alert you to stuff that's "almost" right.  kind of 
like the lisp programmer's assistant.

--- eric



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 08:17:11 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 13:17:11 +0100
Subject: Still the __new__ hell ...
In-Reply-To: <1174167360.522350@jubilee.claranet.pt>
References: <1174167360.522350@jubilee.claranet.pt>
Message-ID: <45fe7f46$0$2138$426a74cc@news.free.fr>

Paulo da Silva a ?crit :
(snip)

Not an answer to your question, just a couple advices:

> from datetime import date
> import cPickle,string

The string module is mostly deprecated. You should use str type methods 
whenever possible (cf below)

> class MyDate(date):
> 	def __new__(cls,year,month=None,day=None):
> 		if type(year) is str:

And what if it's a unicode string ?
The correct idiom here is:
                  if isinstance(year, basestring):

> 			year,month,day=map(int,string.split(year,'-'))
                         year, month, day = map(int, year.split('-'))

> 		if year < 100:
> 			year += 2000
> 		return date.__new__(cls,year,month,day)
> 
(snip)


From gagsl-py2 at yahoo.com.ar  Wed Mar  7 16:17:26 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 18:17:26 -0300
Subject: Generator expression parenthesis mixed with function call ones
References: <esmn5q$5ni$1@news2.u-psud.fr>
	<mailman.4757.1173284624.32031.python-list@python.org>
	<45ef01c7$0$5085$ba4acef3@news.orange.fr>
Message-ID: <op.tot73ct7x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 15:21:57 -0300, Laurent Pointal  
<laurent.pointal at wanadoo.fr> escribi?:

> Gabriel Genellina wrote:
>
>> En Wed, 07 Mar 2007 12:53:43 -0300, Laurent Pointal
>> <laurent.pointal at limsi.fr> escribi?:
>>
>>> Why does Python allow generator expression parenthesis to be mixed with
>>> function call parenthesis when there is only one parameter ?
>Beginners generally know about list-comprehensions and associate the
> syntax "x for x in asequence" to a list expression. I'm not sure that

But list comprehensions have [] around... When you don't see the [], you  
should think "this is something different"...

> reading a "f(i for i in range(20))" they understand that they are dealing
> with a different object kind.

Exactly.

> If function f start by a if len(myparameter)...
>   TypeError: len() of unsized object
>
> If function f goes among its parameter with "for x in myparameter" more  
> than
> once, other loops goes throught an empty loop.

Then he thinks "Something is wrong!", and reads some Python books, or asks  
here, and somebody will point him to the Python Tutorial, section 9.11:  
http://docs.python.org/tut/node11.html#SECTION00111100000000000000000

>>> IMHO this should be forbidden, usage must not be different when there  
>>> is only one parameter and when there are more parameters.

If you want to review the original discussion on how to spell a generator  
expression (called "accumulator display" by that time) see  
http://mail.python.org/pipermail/python-dev/2003-October/038868.html

-- 
Gabriel Genellina



From mikeschinkel at gmail.com  Sun Mar 11 05:34:03 2007
From: mikeschinkel at gmail.com (Mike Schinkel)
Date: Sun, 11 Mar 2007 05:34:03 -0400
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <1173595945.530722.273030@30g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
Message-ID: <000a01c763c0$6863a560$2102fea9@Guides.local>

Hi,

I'm relatively new to Python but have lots of prior programming experience
as a developer, instructor, and author (ASP/VBScript/SQL Server and
Clipper.)

I'm trying to write an app that parses a text file containing an outline
useing essentially the same indentation rules as Python source code, i.e.
the first level has no indent, the second level has one indent, third level
has two indents, and so on. However, I can't know for sure that the
indentations are tabs or spaces, or even mixed tabs and spaces.  What's
more, I can't know for sure what tab spacing the persons editor was using if
they saved as spaces, i.e. tab='N' spaces where N= (2,3,4,5,6,7,8,...)

Clearly the source code for Python has to figure this out, but I wonder if
anyone knows how to do this in Python. Frankly I'm stumped on how to find an
elegant algorithm that does require multipass parsing and lots of code.  Any
help would be appreciated.

-- 
-Mike Schinkel
http://www.mikeschinkel.com/blogs/
http://www.welldesignedurls.org
http://atlanta-web.org - http://t.oolicio.us








From tleeuwenburg at gmail.com  Thu Mar 15 01:37:48 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 14 Mar 2007 22:37:48 -0700
Subject: Python books?
In-Reply-To: <etaatn$nlo$1@iruka.swcp.com>
References: <mailman.4836.1173410475.32031.python-list@python.org>
	<1173427057.176019.171130@n33g2000cwc.googlegroups.com>
	<etaatn$nlo$1@iruka.swcp.com>
Message-ID: <1173937068.386026.38590@e65g2000hsc.googlegroups.com>

The Python Cookbook is still relevant, and is excellent. I have used
it to improve the quality of my solutions to several complex problems.
It helps to explain many of the more advanced tricks to Python
development.

-T



From paul.sijben at xs4all.nl  Mon Mar  5 11:45:44 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Mon, 05 Mar 2007 17:45:44 +0100
Subject: worker thread catching exceptions and putting them in queue
Message-ID: <45ec4936$0$323$e4fe514c@news.xs4all.nl>

All,

in a worker thread setup that communicates via queues is it possible to
catch exceptions raised by the worker executed, put them in an object
and send them over the queue to another thread where the exception is
raised in that scope?

considering that an exception is an object I feel it ought to be
possible, however I do not see how to go about it.

does anyone have a pointer towards the solution?

Paul


From adamgarstang at googlemail.com  Thu Mar  1 15:01:40 2007
From: adamgarstang at googlemail.com (Adam)
Date: 1 Mar 2007 12:01:40 -0800
Subject: New to Tkinter GUI building
In-Reply-To: <oXDFh.7737$tD2.2742@newsread1.news.pas.earthlink.net>
References: <1172695675.279652.98920@a75g2000cwd.googlegroups.com>
	<CfmFh.6986$_73.1105@newsread2.news.pas.earthlink.net>
	<1172701393.612661.193690@m58g2000cwm.googlegroups.com>
	<oXDFh.7737$tD2.2742@newsread1.news.pas.earthlink.net>
Message-ID: <1172779300.546330.140120@h3g2000cwc.googlegroups.com>

Ok the window has resized but the elements inside are still like they
were, so they are going off the edge on the window. How can I get
these to resize? I have put sizes on the frames they are in. Sorry to
keep asking but I'm flying blind here, I have checked the python site
and the intro to tkinter which are both usually good for this kinda
thing.

#####CODE#####

#file/path finder
#indentation value 4
import os,glob
import Tkinter as tk


# Class to create the Application and UI
class Theapp:
    def __init__(self):
        # Create GUI parts. Will allign later with grid
        self.top = tk.Tk()
        self.top.geometry("%dx%d%+d%+d" % (700, 400, 0, 0)) #
(width,height, x, y)
        self.mainWindow = tk.Frame(self.top)#width=700, height=400)
        self.labAll = tk.Label(self.mainWindow, text="All Files/
Folders:")
        self.labVi = tk.Label(self.mainWindow, text="Violating Files/
Folders:")

        #Create a sub-frame containing textbox and scrollbar for All
files scanned display
        self.allTxtf = tk.Frame(self.mainWindow, width=690,
height=164)
        self.scrlr1 = tk.Scrollbar(self.allTxtf)
        self.txtBoxall = tk.Text(self.allTxtf, wrap=tk.CHAR,
yscrollcommand=self.scrlr1.set)
        self.scrlr1.config(command = self.txtBoxall.yview)

        #Create another sub-frame containing textbox and scrollbar for
the Violating files display
        self.viTxtf = tk.Frame(self.mainWindow, width=690, height=164)
        self.scrlr2 = tk.Scrollbar(self.viTxtf)
        self. txtBoxvi = tk.Text(self.viTxtf, wrap=tk.CHAR,
yscrollcommand=self.scrlr2.set)
        self.scrlr2.config(command = self.txtBoxvi.yview)

        #Create another sub-frame to contain the controls
        self.ctrlFrame = tk.Frame(self.mainWindow, width=690,
height=72)
        self.labDir = tk.Label(self.ctrlFrame, text="Dir:")
        self.entDir = tk.Entry(self.ctrlFrame)
        self.labChar = tk.Label(self.ctrlFrame, text="Char. Limit:")
        self.entChar = tk.Entry(self.ctrlFrame, textvariable="254")
        self.btFind = tk.Button(self.ctrlFrame, text="Scan", command =
self.fillboxes)
        self.btExit = tk.Button(self.ctrlFrame, text="Exit", command =
self.quitEvent)


        #Use tkinter's grid geometry manager to allign and display the
GUI
        self.mainWindow.grid()
        #Frist allign the 3 main frames
        self.labAll.grid(row=0)
        self.allTxtf.grid(row=1)
        self.labVi.grid(row=2)
        self.viTxtf.grid(row=3)
        self.ctrlFrame.grid(row=4)
        #Now allign the content of allTxtf
        self.txtBoxall.grid(row=0, column=0)
        self.scrlr1.grid(row=0, column=1, sticky=tk.N + tk.S)
        #Now allign the content for viTxtf
        self.txtBoxvi.grid(row=0, column=0)
        self.scrlr2.grid(row=0, column=1, sticky=tk.N + tk.S)
        #Now allign the content for ctrlFrame
        self.labDir.grid(row=0, column=0, sticky=tk.E)
        self.entDir.grid(row=0, column=1)
        self.labChar.grid(row=0, column=2, sticky=tk.E)
        self.entChar.grid(row=0, column=3)
        self.btFind.grid(row=0, column=4)
        self.btExit.grid(row=0,column=5)

    def findallfiles(self, base):
        Pass

    def fillboxes(self):
        Pass

    def quitEvent(self):
        raise SystemExit


app = Theapp()
app.mainWindow.mainloop()

#####END#####

Regards,
Adam



From codecraig at gmail.com  Thu Mar  1 01:03:07 2007
From: codecraig at gmail.com (craig wickesser)
Date: Thu, 1 Mar 2007 01:03:07 -0500
Subject: pyHook or SetWindowsHookEx
In-Reply-To: <2adc542f0702281805j4eecca2fj211c68a600262fee@mail.gmail.com>
References: <1172584873.585035.319570@m58g2000cwm.googlegroups.com>
	<1172684780.613003.30350@z35g2000cwz.googlegroups.com>
	<2adc542f0702281805j4eecca2fj211c68a600262fee@mail.gmail.com>
Message-ID: <c266ded40702282203x15239077oe7019e85bf0cfe53@mail.gmail.com>

well the problem I have only occurs when my python app. is running as a
Windows Service.  if I run the python app. as a process (i.e. from the
command line) it works as epxected via Remote Desktop.

still not sure what's going on.


On 2/28/07, Sick Monkey <sickcodemonkey at gmail.com> wrote:
>
> I have just gotten into pyHook, so I could be incredibly wrong, but I have
> researched a lot into your problem.  (cuz I have the same question)
>
> I think the python program has to be on the remote machine becuase from my
> understanding pyHook just reads in the windows' keyboard driver.  And when
> you remote desktop or VNC into another machine, i am pretty sure either
> windows (for remote desktop) and vnc (the actual host program) controls the
> key commands so the win objects would not work for remoting.
>
>
>
> On 28 Feb 2007 09:46:20 -0800, abcd <codecraig at gmail.com> wrote:
> >
> > anyone?
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
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From facundo at taniquetil.com.ar  Mon Mar  5 10:43:25 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Mon, 5 Mar 2007 15:43:25 +0000 (UTC)
Subject: writing a file:newbie question
References: <op.tn0uclyksd1mbx@gabriel2.softlabbsas.com.ar>
	<353077.93084.qm@web7805.mail.in.yahoo.com>
Message-ID: <eshdqs$p6e$1@sea.gmane.org>

kavitha thankaian wrote:

>   say for example,,i have a file test.txt and the file has the list
>    
>   a,b,c,d,
>    
>   i would like to delete the trailing comma at the end,,,

>>> "a,b,c,d,".rstrip(",")
'a,b,c,d'

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/





From Leo.Kislov at gmail.com  Fri Mar 23 05:16:05 2007
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 23 Mar 2007 02:16:05 -0700
Subject: Making a non-root daemon process
In-Reply-To: <mailman.5504.1174630787.32031.python-list@python.org>
References: <mailman.5504.1174630787.32031.python-list@python.org>
Message-ID: <1174641365.623257.105690@p15g2000hsd.googlegroups.com>

On Mar 22, 11:19 pm, Ben Finney <b... at benfinney.id.au> wrote:
> Howdy all,
>
> For making a Python program calve off an independent daemon process of
> itself, I found Carl J. Schroeder's recipe in the ASPN Python Cookbook.
> <URL:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731>
>
> This is a thorough approach, and I'm cribbing a simpler process from
> this example. One thing that strikes me is that the algorithm seems to
> depend on running the program as the root user.
>
>     import os
>
>     def become_daemon():
>         pid = os.fork()
>         if pid == 0:
>             # This is the child of the fork
>
>             # Become a process leader of a new process group
>             os.setsid()
>
>             # Fork again and exit this parent
>             pid = os.fork()
>             if pid == 0:
>                 # This is the child of the second fork -- the running process.
>                 pass
>             else:
>                 # This is the parent of the second fork
>                 # Exit to prevent zombie process
>                 os._exit(0)
>         else:
>             # This is the parent of the fork
>             os._exit(0)
>
>     become_daemon()
>     # Continue with the program
>
> The double-fork seems to be to:
>   - Allow the first forked child to start a new process group
>   - Allow the second forked child to be orphaned immediately
>
> The problem I'm having is that 'os.setsid()' fails with 'OSError:
> [Errno 1] Operation not permitted' unless I run the program as the
> root user. This isn't a program that I want necessarily running as
> root.

It works for me. I mean your program above produces no exceptions for
me on Debian 3.1 python2.4

> What does the 'os.setsid()' gain me?

It dettaches you from terminal. It means you won't receive signals
from terminal for sure. Like SIGINT and SIGHUP, but there are maybe
other.

> How can I get that without being
> the root user?

Maybe you can go over the list of all possible signals from the
terminal and notify kernel that you want to ignore them. Sounds
similar to dettaching from the terminal, but maybe there some
differences. But the fact that os.setsid fails for you is weird
anyway.

  -- Leo.



From jstroud at mbi.ucla.edu  Mon Mar  5 07:42:28 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 05 Mar 2007 12:42:28 GMT
Subject: Return type of operator on inherited class
In-Reply-To: <1173093988.715433.205730@t69g2000cwt.googlegroups.com>
References: <1173093988.715433.205730@t69g2000cwt.googlegroups.com>
Message-ID: <UeUGh.7173$re4.2593@newssvr12.news.prodigy.net>

looping wrote:
> Hi,
> my question is on this example:
> 
> class MyStr(str):
>     def hello(self):
>         print 'Hello !'
> 
> s1 = MyStr('My string')
> s2 = MyStr('My second string')
> 
> s1.hello()
> s2.hello()
> 
> s = s1 + s2
> 
> s.hello()
> 
> Hello !
> Hello !
> Traceback (most recent call last):
>   File "<string>", line 204, in run_nodebug
>   File "<module1>", line 13, in <module>
> AttributeError: 'str' object has no attribute 'hello'
> 
> How could I get a type MyStr from the 'plus' (__add__) operation
> without overriding it in my class ?
> I need to override *every* operator I like to use ?
> 

You will not need to override if you

s = MyStr(s1 + s2)

James


From opposite800 at gmail.com  Fri Mar  2 11:46:21 2007
From: opposite800 at gmail.com (lalit)
Date: 2 Mar 2007 08:46:21 -0800
Subject: AJAX Calander like Google Calender
Message-ID: <1172853981.132628.210280@j27g2000cwj.googlegroups.com>

Hi all,

I would like to make the the calender cery similar to google
event calander in python. can any one help me where
i will get library that uses AJAX is this feasible

reg,
Lalit



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 21 16:40:51 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 21:40:51 +0100
Subject: Mastering Python
In-Reply-To: <1174052358.486071.163280@e65g2000hsc.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
Message-ID: <46018fd8$0$18018$426a74cc@news.free.fr>

Paul McGuire a ?crit :
(snip)
> - Don't forget the ()'s.  To invoke a method on an object, you must
> include the parens.  This wont do anything:
>   a = "some string"
>   a = a.lower

It will actually do something: rebind name 'a' to the method lower() of 
the string previously binded to 'a'

(snip)


From grante at visi.com  Tue Mar 20 13:00:17 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 20 Mar 2007 17:00:17 -0000
Subject: if __name__ == 'main':
References: <1174409383.842776.264350@b75g2000hsg.googlegroups.com>
Message-ID: <13004p1cgne4624@corp.supernews.com>

On 2007-03-20, gtb <goodTweetieBird at hotmail.com> wrote:

> I often see the following 'if' construct in python code. What does
> this idiom accomplish?

It checks to see if the file is being run as the "main"
program, and does something if that is so.

> What happens if this is not main?

Nothing.

> How did I get here if it is not main?

By importing the file.

> if __name__ == 'main':
>    myQuest('myQuest').Run()
>


-- 
Grant Edwards                   grante             Yow!  Thank god!!... It's
                                  at               HENNY YOUNGMAN!!
                               visi.com            


From paul at boddie.org.uk  Sun Mar 25 14:16:16 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 25 Mar 2007 11:16:16 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
Message-ID: <1174846576.353998.161110@e65g2000hsc.googlegroups.com>

gslm wrote:
> Hi!
> I'm too new on phyton.I have installed phyton.But when I write phyton
> command, unfortunately, i can't run.I suppose that it is bacause of
> setting path.But i can't solve.
> Can you help?

It's "python" you should be typing, of course. If that doesn't work
then it may be a PATH issue, yes.

> Another thing is, when i double click the .py file, there are the
> project form and the command line.How can i provide to view only the
> project?

I think you need to rename the .py file so that it ends with .pyw -
this stops the command line window from opening, but it's only useful
if you are running a graphical program, obviously.

Paul



From http  Thu Mar 22 15:28:10 2007
From: http (Paul Rubin)
Date: 22 Mar 2007 11:28:10 -0800
Subject: [JOB] Sr. Python Developer, Northern VA
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5477.1174588473.32031.python-list@python.org>
Message-ID: <7x3b3xaxit.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> > high-profile hiring fests like pycon.
> What! I resent that remark. PyCon was started precisely because I felt
> a low-cost event would better encourage community involvement. If
> PyCon is beyond your means that you clearly aren't looking to be hired
> as a programmer ;-)

It's less expensive than typical industry conferences but it's about
3x as expensive as CodeCon was, comparing at-the-door charges.  Plus
there's travel and possibly lodging expenses if you're not local to
the venue.  Plus there's extra charges for the tutorials, if you want
to attend those.  All in all, at least this past one was something
that I couldn't seriously consider going to.


From claird at lairds.us  Sat Mar 31 01:35:10 2007
From: claird at lairds.us (Cameron Laird)
Date: Sat, 31 Mar 2007 05:35:10 +0000
Subject: Newbie Question (real-time communication between apps: audio, 3d,
	PD, Blender)
References: <1175294306.124030.272350@l77g2000hsb.googlegroups.com>
	<130r6df92n4rp04@corp.supernews.com>
Message-ID: <eh81e4-7vc.ln1@lairds.us>

In article <130r6df92n4rp04 at corp.supernews.com>,
Grant Edwards  <grante at visi.com> wrote:
>On 2007-03-30, gregorywieber at gmail.com <gregorywieber at gmail.com> wrote:
>
>> I'm just beginning my exploration of Python and I have a rather
>> general question. If two particular programs have Python scripting
>> capabilities, does that mean those two programs can communicate in
>> real time through Python?
>
>No.
			.
			.
			.
No and yes.  Two Python interpreters *can* communicate;
there are all sorts of possibilities, depending on what
one intends by "real-tine".  I agree, of course, that 
Python doesn't build in an explicit Python-specific IPC.


From kyosohma at gmail.com  Thu Mar 29 12:07:59 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 09:07:59 -0700
Subject: Finding User Profile path
In-Reply-To: <mailman.5758.1175182156.32031.python-list@python.org>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>
	<mailman.5745.1175154506.32031.python-list@python.org>
	<1175173141.277735.192020@o5g2000hsb.googlegroups.com>
	<mailman.5755.1175174512.32031.python-list@python.org>
	<1175175904.199745.81460@y80g2000hsf.googlegroups.com>
	<mailman.5756.1175177029.32031.python-list@python.org>
	<1175177689.254125.250390@b75g2000hsg.googlegroups.com>
	<mailman.5758.1175182156.32031.python-list@python.org>
Message-ID: <1175184479.704783.275410@p15g2000hsd.googlegroups.com>

On Mar 29, 10:30 am, Tim Golden <m... at timgolden.me.uk> wrote:
> [resending as the original seems to have got lost;
> apologies if it appears as a duplicate]
>
> At the risk of insulting your intelligence, here's a
> rough-and-ready non-AD solution (culled from some code I
> had somewhere):
>
> <code>
> import win32net
> import win32netcon
>
> dc = win32net.NetGetAnyDCName (None, None)
> #
> # Or your specific server name, if you want
> #
>
> resume = 0
> while 1:
>    (_users, total, resume) = \
>      win32net.NetUserEnum (
>        dc,
>        3,
>        win32netcon.FILTER_NORMAL_ACCOUNT,
>        resume,
>        win32netcon.MAX_PREFERRED_LENGTH
>      )
>    for _user in _users:
>      print _user['name'], _user['home_dir'], _user['profile']
>    if not resume:
>      break
>
> </code>
>
> TJG

Thanks a lot. That seems to work the way we need. And don't worry too
much about my intelligence...I've only been programming in Python
since last May.

Mike



From anilkum.tech at gmail.com  Fri Mar 16 18:59:09 2007
From: anilkum.tech at gmail.com (Anil Kumar)
Date: Fri, 16 Mar 2007 15:59:09 -0700
Subject: File extension
Message-ID: <cf14220703161559s1d106d03gd02bac4c0d695506@mail.gmail.com>

Hi,

Can Python Script can have different extensions like .sh etc.... Or Is .py
is mandatory to be present as the extension for the Python Script.

We have an application where the script was initially written in shell
script with extension .sh. Now we are migrating this script to be run in
both Unix and Windows, so using Python for migration.

I have created a new Python Script porting all the changes in shell script
and it is working fine in Unix/Linux operating system. Later I changed the
extension of the file from .py to .sh, even then it worked.

But when I try a python script with extension .sh in windows, the file is
not getting recognized by the Python interpreter. Is this supported? Or is
there any way we can achieve the same?

The reason I am trying to change the extension is, it reduces lot of porting
changes. No need to go to each of our file which were referencing .sh file
before and change it to .py.

Any Help would be greatly Appreciated.

Thanks & Regards,
Anil
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From gagsl-py2 at yahoo.com.ar  Sun Mar 18 21:27:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 Mar 2007 22:27:03 -0300
Subject: * operator--as in *args?
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
	<1174254032.155494.228530@e65g2000hsc.googlegroups.com>
Message-ID: <op.tpewzdiex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 18 Mar 2007 18:40:32 -0300, Dustan <DustanGroups at gmail.com>  
escribi?:

>> I can't find any documentation for the * operator when applied in
>> front of a name.  Is it a pointer?
>
> For the *star, see apply here:
> http://docs.python.org/lib/non-essential-built-in-funcs.html

Also, you can read this section on the Tutorial:
http://docs.python.org/tut/node6.html#SECTION006700000000000000000
or the more technical Language Reference:
http://docs.python.org/ref/calls.html and  
http://docs.python.org/ref/function.html

>> Are there python names for these operators that would make searching
>> for documentation on them more fruitful?

Uhhhm, none that I can think of :(

-- 
Gabriel Genellina



From aleax at mac.com  Mon Mar 26 21:26:27 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 26 Mar 2007 18:26:27 -0700
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<1hvknm0.ph0nmh4ucf31N%aleax@mac.com> <055ld4-qrv.ln1@lairds.us>
Message-ID: <1hvlhf8.z6sc6o1id2v25N%aleax@mac.com>

Cameron Laird <claird at lairds.us> wrote:
   ...
> >If you're just trying to learn and check things out, it might be better
> >to get a more recent Python from python.org (2.5 or 2.4.4) and the
> >various other packages as and when you need them (you can use the
> >MacEnthon list as a guide:-).  You'll need a C compiler to be sure you
> >can install any package from sources -- Apple's XCode includes gcc, it's
> >free, and it's the safest choice (but it's a HUGE download, as it comes
> >with a lot of stuff -- I don't think Apple offers a simple way to
> >install "just" gcc and minimal supporting tools).
> 
> Yes and no.  Alex, while useful scientific computing under Mac OS X
> will almost certainly eventually involve installation of XCode and
> so on, Nomad.C can start to learn Python without a need to install
> ANYTHING.  As you know, Python is already there, and the version that
> comes with 10.4 (2.3.5, as nearly as I can easily tell) is easily 
> adequate to take him through the Tutorial (with minor exceptions).

I disagree: the Python 2.3.5 distributed by Apple as part of MacOSX 10.4
comes _without_ readline -- meaning that an up-arrow at the interactive
interpreter prompt gives Esc-[-A, a left-arrow gives Esc-[-D, etc,
instead of usefully recovering previous lines and allowing easy edit of
the current line.  There is really no reason one should suffer through
that!  python.org's 2.5 DMG (and, if I recall correctly, 2.4.4 as well)
come with a working idle, which is even nicer to use, and at any rate a
working readline, so that one can easily correct minor mistakes made
entering code at the interactive interpreter.

XCode, or other add-ons, may surely come later, but downloading the 2.5
or 2.4.4 DMG from python.org is HIGHLY recommended anyway.


> Also, while I, like you, am aware of no minimal-gcc package from
> Apple, I think third parties make it available.  However, I'm not
> motivated enough at this point to track down the details.  I think
> Nomad.C should start with what he has under 10.4, and plan to move
> on later to all of XCode.

10.4 does come with a version of XCode (on MacOSX's DVD, if not already
on disk in /Applications/Installers) -- though not the latest and
greatest, it's quite likely to be adequate for any learning whatsoever.
The bundled Python is a different issue, and I do _not_ consider it
adequate -- I'd suggest 2.5 instead, though 2.4.4 will be fine too.


Alex


From jmcmonagle at velseis.com.au  Tue Mar 27 02:05:19 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Tue, 27 Mar 2007 16:05:19 +1000
Subject: help with radionbutton
In-Reply-To: <CE02B049-6583-4D31-B8C0-2972B402735F@gmail.com>
References: <CE02B049-6583-4D31-B8C0-2972B402735F@gmail.com>
Message-ID: <4608B41F.3070601@velseis.com.au>

Sang Park wrote:
> how do I select radionbutton by default? 
> for my school project, I need to have 10 radio buttons and have half of 
> them selected
> I have
> for i in range(10):
> x = IntVar()
> if i < 5:
> rb = Radiobutton(buttonFrame, variable=x, value=1,state=DISABLED)
> else:
> rb = Radiobutton(buttonFrame, variable=x, value=0,state=DISABLED)
> 
> I tried x.set(1) or x.set(0) before or after but the all seem to be 
> deselected when displayed on the screen
> I also tried calling rb.select/deselect() but that doesn't seem to work 
> either...
> can anyone help me?
> 
> 
Sounds like you actually want to use Checkbuttons.  Radiobuttons allow 
unique selections from a group all tied to a single variable whereas 
Checkbuttons act like an on/off toggle.

Regards,

John



From codecraig at gmail.com  Fri Mar  9 14:03:34 2007
From: codecraig at gmail.com (abcd)
Date: 9 Mar 2007 11:03:34 -0800
Subject: Are Lists thread safe?
Message-ID: <1173467014.510693.60330@30g2000cwc.googlegroups.com>

Are lists thread safe?  Or do I have to use a Lock when modifying the
list (adding, removing, etc)?  Can you point me to some documentation
on this?

thanks



From steve at REMOVEME.cybersource.com.au  Tue Mar  6 22:21:22 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 07 Mar 2007 14:21:22 +1100
Subject: is it possible to give an instance a value?
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
Message-ID: <pan.2007.03.07.03.21.21.381410@REMOVEME.cybersource.com.au>

On Tue, 06 Mar 2007 14:45:45 -0800, manstey wrote:

> class Test(object):
>      def __init__(self, val):
>            self.val = val
> 
>>>> a = Test('hello')
>>>> a.val  + ' happy'
> 'hello happy'
>>>> a + 'happy'
> TypeError: unsupported operand type(s) for +: 'Test' and 'str'
> 
> Is there a way to make a have the value a.val when it is used as
> above, or as an argument (eg function(a, 10, 'sdf') etc)?

That's kinda-sorta like "delegation", which is an alternative to
sub-classing. Whether you subclass string or delegate to a string, the end
result will be the same, only the implementation will be different.

However, while sub-classing str will give you an immutable object,
delegation can give you a mutable string. See UserString.MutableString for
details -- but beware that this is significantly slower than ordinary
strings.

Honestly, once you've been using immutable strings for a while, you'll
rarely care that they aren't mutable.



> The only fudge I discovered for simple addition was to add to the
> class
> 
>    def __add__(self, obj):
>        return a.val + obj
> 
> but this doesn't solve the problem in general. I have tried
> subclassing the string type, but as it is immutable, this is not
> flexible the way a.val is (i.e. it can't e reassigned and remain a
> subclass).

Because of the way Python works, you can't really expect this to work:

>>> s = MyClass("something") # s is assigned an instance of MyClass
>>> s = "ordinary string" # s magically remains a MyClass instance

Python just doesn't work that way. The name "s" can't force the object
"ordinary string" to be some other type. If you want "s" to have an
instance of MyClass assigned to it, you have to do it explicitly:

>>> s = MyClass("ordinary string") # not ordinary any more


If you are willing to write s.data instead of s, then you can make the
data attribute a property and automate most of that.


class MyString(str):
    pass # customise the behaviour you want to see

class MyClass(object):
    def __init__(self, data):
        self.data = data
    def _getter(self):
        return self._data
    def _setter(self, data):
        self._data = MyString(data)
    data = property(_getter, _setter, None, None)


Now you can do this:

>>> inst = MyClass("hello world")
>>> inst.data += "!"
>>> type(inst.data)
<class '__main__.MyString'>
>>> inst.data = "Nobody expects the Spanish Inquisition!"
>>> type(inst.data)
<class '__main__.MyString'>

But this doesn't work:

>>> inst = "dead parrot"
>>> type(inst) == MyClass # what we want to be True
False


But chances are that all of that scaffolding (delegation, properties,
etc.) would be unnecessary if you just change the way you do things. E.g.
instead of your example:

>>> Person.Address
'Sydney'
>>> Person.Address.type
'%String'

Python can do this:

>>> Person.Address
'Sydney'
>>> type(Person.Address)
<type 'str'>

If you sub-classed str like this:

class MyString(object):
    def __init__(self, data, type="%String"):
        self.data = data
        self.type = type

hoping to use it like this:

>>> fred = Person("Address", "Sydney", "%String") # or something...
>>> fred.Address
'Sydney'
>>> fred.Address.type
'%String'

then you're just making work for yourself.


Hope this makes sense.


-- 
Steven D'Aprano 



From erwan.adam at cea.fr  Wed Mar  7 05:35:05 2007
From: erwan.adam at cea.fr (Erwan Adam)
Date: Wed, 07 Mar 2007 11:35:05 +0100
Subject: Pb with __del__ and inheritence
Message-ID: <esm4gq$432$1@ellebore.extra.cea.fr>

Hello all,

Can someone reproduce this bug ... I use :

[adam at is111902 /home/adam/Work/Python]> python
Python 2.4.3 (#2, Sep 18 2006, 21:07:35)
[GCC 4.1.1 20060724 (prerelease) (4.1.1-3mdk)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>>

First test :

[adam at is111902 /home/adam/Work/Python]> cat bug_del.py && echo "------" 
&& python bug_del.py

class XObject(object):

     def __del__(self):
         print "XObject.__del__"
         return

     pass

class A(XObject):

     def __del__(self):
         print "A.__del__"
         XObject.__del__(self)
         return

     pass

a = A()
------
A.__del__
XObject.__del__
[adam at is111902 /home/adam/Work/Python]>

Everything is ok ... now I just replace "a = A()" by "aaa = A()":

[adam at is111902 /home/adam/Work/Python]> cat bug_del.py && echo "------" 
&& python bug_del.py

class XObject(object):

     def __del__(self):
         print "XObject.__del__"
         return

     pass

class A(XObject):

     def __del__(self):
         print "A.__del__"
         XObject.__del__(self)
         return

     pass

aaa = A()
------
A.__del__
Exception exceptions.AttributeError: "'NoneType' object has no attribute 
'__del__'" in <bound method A.__del__ of <__main__.A object at 
0xb7bb124c>> ignored
[adam at is111902 /home/adam/Work/Python]>

!!!


Thanks in advance,

             E.A.


From irmen.NOSPAM at xs4all.nl  Fri Mar 23 18:54:12 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Fri, 23 Mar 2007 23:54:12 +0100
Subject: Create new processes over telnet in XP
In-Reply-To: <mailman.5531.1174684678.32031.python-list@python.org>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>	<46043ad8$0$27402$ba4acef3@news.orange.fr>
	<mailman.5531.1174684678.32031.python-list@python.org>
Message-ID: <46045acb$0$326$e4fe514c@news.xs4all.nl>

Shane Geiger wrote:
> This reminds me of something I once wanted to do:  How can I install 
> Python in a totally non-gui way on Windows (without the use of VNC)?  I 
> think I was telnetted into a computer (or something like that) and I was 
> unable to run the usual Python installer because it uses a GUI.

Python uses a MSI (microsoft installer) based installer on windows.
This was introduced in version 2.5 I believe.

For MSI installers there's the standard MSI-way to perform a "silent" install.
Google for it, I don't know what the command line switch(es) are, but they're there.

--Irmen



From facundo at taniquetil.com.ar  Tue Mar 20 09:05:00 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Tue, 20 Mar 2007 13:05:00 +0000 (UTC)
Subject: Problem with sockets and python 2.5
References: <200703192207.08178.jareguero@telefonica.net>
Message-ID: <etom5r$tal$1@sea.gmane.org>

Jose Alberto Reguero wrote:

> 2:
> 	server.py at x86_64 python 2.5
> 	client.py at i386 python 2.4
> Don't work

What do you mean with "don't work"?

They crash? Your machine hungs? Your house explodes?

You'd be more specific in the error you get, and what behaviour you
expect.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From micahel at gmail.com  Sun Mar 25 18:38:13 2007
From: micahel at gmail.com (Michael Hudson)
Date: Sun, 25 Mar 2007 23:38:13 +0100
Subject: EuroPython 2007: Call for Proposals
Message-ID: <aa0dfd860703251538l2252f207t268dd6b3d1366298@mail.gmail.com>

Book Monday 9th July to Wednesday 11th July 2007 in your calendar!
EuroPython 2007, the European Python and Zope Conference, will be held in
Vilnius, Lithuania.  Last year's conference was a great success, featuring
a variety of tracks, amazing lightning talks and inspiring keynotes.  With
your participation, we want to make EuroPython 2007, the sixth EuroPython,
even more successful than the previous five.

Talks, Papers and Themes
------------------------

This year we have decided to borrow a few good ideas from PyCon, one of
which is to move away from the 'track' structure.  Instead, speakers are
invited to submit presentations about anything they have done that they
think would be of interest to the Python community.  We will then arrange
them into related groups and schedule them in the space available.  In the
past, EuroPython participants have found the following themes to be of
interest:

 * Science
 * Python Language and Libraries
 * Web Related Technologies
 * Education
 * Games
 * Agile Methodologies and Testing
 * Social Skills

In addition to talks, we will also accept full paper submissions about any
of the above themes.  The Call for Refereed Papers will be posted shortly.

The deadline for talk proposals is Friday 18th May at midnight (24:00
CEST, Central European Summer Time, UTC+2).

Other ways to participate
-------------------------

Apart from giving talks, there are plenty of other ways to participate in
the conference.  Just attending and talking to people you find here can be
satisfying enough, but there are three other kinds of activity you may wish
to plan for: Lightning Talks, Open Space and Sprints.  Lightning Talks are
very short talks that give you just enough time to introduce a topic or
project, Open Space is an area reserved for informal discussions, and
Sprints are focused gatherings for developers interested in particular
projects.  For more information please see the following pages:

 * Lightning Talks: http://www.europython.org/sections/events/lightning_talks
 * Open Space: http://www.europython.org/sections/events/open_space
 * Sprints: http://www.europython.org/sections/sprints_and_wiki

Your Contribution
-----------------

To propose a talk or a paper, go to...

 * http://www.europython.org/submit

For more general information on the conference, please visit...

 * http://www.europython.org/

Looking forward to seeing what you fine folk have been up to,

The EuroPython Team


From andreas.raab at gmx.de  Sat Mar 10 15:43:53 2007
From: andreas.raab at gmx.de (Andreas Raab)
Date: Sat, 10 Mar 2007 12:43:53 -0800
Subject: [Edu-sig] minimum age to learn python (a.k.a graphical vs text
	languages)
In-Reply-To: <f604188c0703100837r1762e63clda21fd199d3fe1f4@mail.gmail.com>
References: <45F2CFC4.5010801@bryant.edu>
	<f604188c0703100837r1762e63clda21fd199d3fe1f4@mail.gmail.com>
Message-ID: <45F31889.6040201@gmx.de>

kirby urner wrote:
> I just talked to the computer teacher yesterday and he
> was reporting some rumor that future versions of Alice will
> center around the same Sims as in Sims, which my daughter
> plays with *a lot* (we also bought Civ City Rome yesterday,
> coincidentally, and she built Rome in a day).

More than rumor apparently:

   http://www.cmu.edu/cmnews/extra/060310_alice.html

Cheers,
   - Andreas


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 25 07:32:21 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 25 Mar 2007 13:32:21 +0200
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
	<mailman.5563.1174770480.32031.python-list@python.org>
Message-ID: <56n4u5F2a84lkU2@mid.individual.net>

Felipe Almeida Lessa wrote:

> Could you tell me what in Python isn't an object? 

Difficult ;) All data structures are (CMIIW). Functions and Types
are objects, too.

> Are you counting old-style classes and instances as "not object"s?

No, both are.

Regards,


Bj?rn

-- 
BOFH excuse #366:

ATM cell has no roaming feature turned on, notebooks can't connect



From rasmussen.bryan at gmail.com  Sun Mar 25 18:10:31 2007
From: rasmussen.bryan at gmail.com (bryan rasmussen)
Date: Mon, 26 Mar 2007 00:10:31 +0200
Subject: problem at installing phyton on windows
In-Reply-To: <1174859432.355892.110520@l77g2000hsb.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
	<eu6k3n$uk6$03$1@news.t-online.com>
	<1174857800.421722.218190@e65g2000hsc.googlegroups.com>
	<1174859432.355892.110520@l77g2000hsb.googlegroups.com>
Message-ID: <3bb44c6e0703251510t48a22beep83756ed9bb47dfb7@mail.gmail.com>

>
> Obviously, "Phyton" will never be defined.
>

Indeed I remember in the climactic showdown between Phyton and the
rest of the gamma ranger FooDroids and he kept doing the mega kick
move. and I was thinking wow Phyton will never be defined, he will
just keep kicking ass.

I hear they're gonna make a Phyton Commandant movie.

Cheers,
Bryan Rasmussen


From MonkeeSage at gmail.com  Wed Mar  7 21:02:44 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 7 Mar 2007 18:02:44 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <45ef3b80$0$18249$426a34cc@news.free.fr>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
	<45ef3b80$0$18249$426a34cc@news.free.fr>
Message-ID: <1173319364.288542.252370@j27g2000cwj.googlegroups.com>

On Mar 7, 4:58 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
>    except_retry: # the missing(???) keyword you're after

What is 'except_retry'?

To the OP, with the loop and the callables you could also break out of
the loop when the condition is met and use the else condition to raise
the exception.

def test(arg):
    for f in int, float, str, hex:
        try:
            return f(arg)
            break # breaks on f==str
        except:
            pass
    else:
        raise ValueError # remove str above to see this
print test('^&%')

Regards,
Jordan




From bj_666 at gmx.net  Wed Mar 21 05:39:59 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 21 Mar 2007 10:39:59 +0100
Subject: replace illegal xml characters
References: <1174464899.057656.177410@d57g2000hsg.googlegroups.com>
Message-ID: <pan.2007.03.21.09.39.56.10295@gmx.net>

In <1174464899.057656.177410 at d57g2000hsg.googlegroups.com>, killkolor
wrote:

> I am working with InDesign exported xml and parse it in a python
> application. I learned here: http://boodebr.org/main/python/all-about-python-and-unicode
> that there actually are sets of illegal unicode characters for xml
> (and henceforth for every compliant xml parser). I already implemented
> a regex solution to replace the characters in question, but I wonder
> if there is a efficient and out-of-the-box solution somewhere out
> there for this problem. does anybody know?

Does InDesign export broken XML documents?  What exactly is your problem?

Ciao,
	Marc 'BlackJack' Rintsch


From michael at jedimindworks.com  Thu Mar 22 13:50:52 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 22 Mar 2007 12:50:52 -0500
Subject: Problem with time
In-Reply-To: <4602bc27$0$9709$426a74cc@news.free.fr>
References: <4602bc27$0$9709$426a74cc@news.free.fr>
Message-ID: <7CEAA7BC-FDB2-4AC3-9E5C-DB217DBA54C3@jedimindworks.com>

>
> 1) i got 2 values from mysql db (fields are "time" type)
> 2) python get it as "<type 'datetime.timedelta'>" (why timedelta???)
> 3) i need to compare 2 fields with actual time ... EG:
> if ArrOutputsAuto[i].TimeFrom >= GNow and ArrOutputsAuto[i].TimeTo  
> <= GNow:
>
> i need actual time, and 2 fields from DB in datetime.time type  
> (correct me
> if i'm wrong) so i can do my test "if time>= ..."
>
> I think i can grab time from DB in string and parse it in
> datetime.time(x,x,x) but its not very optimized
>
> Any idea ?

Just a guess, really.  Is it perchance a timedelta from the epoch?   
If so, comparison should be easy.




From fred at adventistcare.org  Wed Mar 14 10:49:42 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Wed, 14 Mar 2007 10:49:42 -0400
Subject: Mocking OpenOffice in python?
Message-ID: <BB295D7C21C5344E94A3EEBA9089BD940326A9@accmail2.sunbelt.org>

I currently use Java to generate a 150 page PDF from about 50 .odt files,
including replacing occurrances of about 10 "place-holder" phrases from data
in our system.  I do not use the OOo database/mailmerge features, just UNO.
This process takes about 20 seconds on my 2 year old XP laptop and about 10
seconds on our Linux doc server.

So the key problem may be your approach to generating the OO being to slow,
rather than needing a way to speed up testing.

I use a std java property file/url to define the search/replace pairs and to
contol insert of the conditional documents.

FWIW the internal .odt is XML once it is unzipped.

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of PaoloB
Sent: Wednesday, March 14, 2007 9:11 AM
To: python-list at python.org
Subject: Re: Mocking OpenOffice in python?


On 14 Mar, 14:48, Carsten Haese <cars... at uniqsys.com> wrote:
> On Wed, 2007-03-14 at 01:39 -0700, PaoloB wrote:
> > Hi everyone,
>
> > during our development, we need to write some unit tests that interact
> > with OpenOffice through pyUno.
>
> > Is there anyone who has got any experience on it? As OpenOffice is
> > quite a large beast, and interaction is rather complex, I would like
> > to know if there is someone who is willing to share experience (and,
> > possibly, code).
>
> I have some experience with pyuno, but your question is very open-ended.
> It would be helpful if you asked specific questions or gave more
> background on what kind of interaction you're trying to achieve.
>
> The generic answer to your request for code examples is that there's a
> tutorial with example code
athttp://udk.openoffice.org/python/python-bridge.html, and then there's
> the API documentation
athttp://api.openoffice.org/DevelopersGuide/DevelopersGuide.html.
>
> -Carsten

Hi Carsten,

basically, our project (PAFlow) is an application for producing
documents in public administrations.

We create templates using OpenOffice, that are filled automatically
using data from the application itself.

Now, interacting with OpenOffice is slow, and our tests get a lot of
time to be executed automatically.

We are trying to mock OpenOffice, so that we can run our tests without
using a true OpenOffice for our tests, except when we express test the
filling of data and production of document.

Ciao

PaoloB


-- 
http://mail.python.org/mailman/listinfo/python-list


From rmcore at gmail.com  Wed Mar 14 02:18:20 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Wed, 14 Mar 2007 01:18:20 -0500
Subject: Twelve Proofs that Muhammad is a True Prophet
In-Reply-To: <1173848968.285569.196780@d57g2000hsg.googlegroups.com>
References: <1173848968.285569.196780@d57g2000hsg.googlegroups.com>
Message-ID: <3763E8F4-1B9A-44CC-B598-1C646C616CD1@gmail.com>


On Mar 14, 2007, at 12:09 AM, moslim wrote:

> My brothers and sisters everywhere! With this essay, I am not singling
> out the adherents of Islam - to which I ascribe - but rather I am
> writing this essay to every man and woman throughout the whole world.
> ...
>

You know, at first I didn't realize you were posing a python  
question.  But when I tried cutting the text of your message and  
pasting it into my python interpreter -- well, I immediately  
understood your frustration.

You see, your syntax is all wrong, bro.  Perhaps you should try  
surrounding the long string containing linefeeds by triple-quotes.   
It won't be of much use unless you assign it to a variable or  
something -- but at least your interpreter will stop complaining.

hope this helps,
Michael



From cfbolz at gmx.de  Wed Mar 28 17:41:33 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 23:41:33 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175083955.167868.88610@n76g2000hsh.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
Message-ID: <460AE10D.9030101@gmx.de>

Kay Schluehr wrote:
 > Nice to read that things are going on. I've still a PyPy 0.7 version
 > on my notebook. I guess I will upgrade :)
 >
 > A somewhat unrelated question. With Py3K Python gets optional type
 > annotations. Are you already architecting an annotation handler that
 > can process these annotations? This feature is somewhat competitive to
 > all the complicated type inference and jitting you have been worked
 > out so I don't know how it fits well into the current PyPy
 > architecture?

I don't see at all why type annotations are competitive to the type
inference that PyPy's translation toolchain is doing. The type inference
of PyPy is an artefact of the way we are implementing our interpreter
(namely in RPython). You also wouldn't say that the static typing of C
is competitive to type annotations because CPython is written in C,
right?

The JIT (which is completely independent from our type inference engine)
will hopefully deal well with the eventual addition of type annotations
(it's not clear to me how soon we will start supporting Py3k features,
we are not even fully supporting Python 2.5 yet). Since the JIT is
automatically generated out of the Python interpreter it should deal
with any sort of language changes rather well. Whether that is true in
practice remains to be seen, but this is one of the reason why PyPy was
started in the first place.

Also, I fail to see how type annotations can have a huge speed-advantage
versus what our JIT and Psyco are doing. Imagine you have a function
that is nicely algorithmic, takes only integers as arguments and only
does some calculations with them. If you have a Psyco-like scheme, the
JIT will note that you are using it mostly with ints, generate
relatively efficient assembly for the whole function (at least after it
has been called several times). If you call that functions, the
arguments are checked whether they are integers and then the fast
assembly code is used without any further type checks. How can you
improve on this with type annotations? If the type annotations say that
your arguments have to be ints, you _still_ have to check whether this
is true. So it is not faster than what Psyco is doing and has the
disadvantage that it only works with ints -- good bye, duck typing.
Psyco on the other hand will be perfectly happy with you using a custom
class that looks mostly like an int and generate assembly optimized for
this situation.

Cheers,

Carl Friedrich Bolz



From ncalexander at gmail.com  Sat Mar  3 14:00:22 2007
From: ncalexander at gmail.com (Nick Alexander)
Date: 3 Mar 2007 11:00:22 -0800
Subject: How to set docstrings for extensions supporting PyNumberMethods?
Message-ID: <1172948422.661418.312560@8g2000cwh.googlegroups.com>

Hello,

I am writing a python extension (compiled C code) that defines an
extension type with PyNumberMethods.  Everything works swimmingly,
except I can't deduce a clean way to set the docstring for tp_*
methods.  That is, I always have

type.__long__.__doc__ == 'x.__long__() <==> long(x)'

which a quick glance at the Python 2.5 source shows is the default.

I have found that I can use PyObject_GetAttr and PyWrapperDescrObject
and set the descriptor objects d_base->doc to a char pointer... but I
can't tell if this is safe.  Or the right way to do it.

If I'm on the wrong list, please let me know!
Thanks,
Nick Alexander



From aleax at mac.com  Fri Mar 23 01:11:17 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 22 Mar 2007 22:11:17 -0700
Subject: design question: generator object with other attributes
References: <aLAMh.8608$EA.2582@trnddc07>
Message-ID: <1hvedlj.o5mih6dpak1qN%aleax@mac.com>

Alan Isaac <aisaac at american.edu> wrote:

> Essentially I want a generator that I can query about
> its characteristics.  (E.g., a random number generator
> that I want to be able to ask about is distributional
> parameters.)
> 
> I am thinking of a class that wraps a generator.
> An object of this class will have a ``next`` method that simply
> returns the value the object get by calling the wrapped
> generator.
> 
> A reasonable approach?

Sure, given the undiscussed constraints.

> 
> Thanks,
> Alan Isaac
> 
> PS Here is a useless class to illustrate the basic idea
> that you could have both attribute access and a
> generator-connected ``next`` method.
> 
> class Start2Stop:
>         def __init(start,stop):
>                 self.start = start
>                 self.stop = stop
>                 self.numgen = (i for in in xrange(start,stop))
>         def next(self):
>                 return self.numgen.next()

Don't forget to add:

def __iter__(self): return self


Alex.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  1 04:33:51 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 01 Mar 2007 10:33:51 +0100
Subject: How to update DNS record
References: <es5v6v$pv8$1@online.de>
Message-ID: <54nkvtF21ft8aU1@mid.individual.net>

Andi Clemens wrote:

> I want to change the A-Record for some IPs, this shouldn't be too
> hard. I looked at dnspython and twisted, but I really don't have a
> clue how to do this.
> Has anyone done this before?

Read RFC 2136 (Dynamic updates in the DNS) and see if your server
can be configured to do this. If not, you'll have to change the
zone files manually and reload the DNS config.

Regards,


Bj?rn

-- 
BOFH excuse #203:

Write-only-memory subsystem too slow for this machine. Contact your
local dealer.



From sri1025 at gmail.com  Thu Mar  8 03:26:45 2007
From: sri1025 at gmail.com (Srikanth)
Date: 8 Mar 2007 00:26:45 -0800
Subject: Problem with Packages
In-Reply-To: <mailman.4788.1173334443.32031.python-list@python.org>
References: <1173332271.733596.159790@p10g2000cwp.googlegroups.com>
	<mailman.4788.1173334443.32031.python-list@python.org>
Message-ID: <1173342404.977567.241310@30g2000cwc.googlegroups.com>

> It appears that you forgot the basic rule: a package is a directory with
> an __init__.py file (even if empty).

Exactly right. I didn't know that __init__.py is a mandatory one.
Thanks for pointing out.

> > my_apps
> > |
> > |--> mod3.py
> > |--> dir1/dir1_1/mod1.py
> > |--> dir2/dir2_2/mod2.py
>
> You need 4 of such files here.

Thanks again for saying 4, cause I would have definetly put only 2
(inside dir1_1 and dir2_2)

> > And the directory my_apps is included in PYTHONPATH environment
> > variable, what am I doing wrong? I executed this code under PyDev and
> > it's working perfectly but when I run it outside of PyDev, it fails.
>
> Maybe PyDev plays some tricks with PYTHONPATH or something...
>

I got the same doubt and I checked PyDev before posting, the
PYTHONPATH is exactly the same but I didn't notice or rather
overlooked __init__.py file it created automatically when I created
packages using the dialogs.

> Gabriel Genellina

Thanks you Gabriel!
-- Srikanth



From MonkeeSage at gmail.com  Fri Mar  2 12:47:45 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 09:47:45 -0800
Subject: Python GUI + OpenGL
In-Reply-To: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <1172857665.042592.98730@p10g2000cwp.googlegroups.com>

On Mar 2, 9:17 am, Achim Domma <d... at procoders.net> wrote:
> I need a OpenGL context without restrictions and some settings dialogs.
> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set
> of tools/libs?

You could use pygtk + pygtkglext.

http://pygtk.org/
http://gtkglext.sourceforge.net/

Regards,
Jordan



From skip at pobox.com  Wed Mar 14 14:53:30 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 14 Mar 2007 13:53:30 -0500
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <et958a$o9c$1@news2.u-psud.fr>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
Message-ID: <17912.17578.755279.791016@montanaro.dyndns.org>

    >> When is it appropriate to use dict.items() vs dict.iteritems. 

    Laurent> Both work, you may prefer xrange/iteritems for iteration on
    Laurent> large collections...

I find "iter<anything>" to be extremely ugly and hope to avoid using them
altogether until they are gone in Py3k.

Skip


From stanc at al.com.au  Thu Mar 29 02:14:41 2007
From: stanc at al.com.au (Astan Chee)
Date: Thu, 29 Mar 2007 16:14:41 +1000
Subject: upgrading python (and other modules)
In-Reply-To: <460B4B9A.1010703@al.com.au>
References: <460B4B9A.1010703@al.com.au>
Message-ID: <460B5951.4040101@al.com.au>

Forget I asked this question.
I've solved it using wxPython 2.6.3.3
Cheers

Astan Chee wrote:
> Hi,
> I was once using python 2.4 in win2k with wxPython 2.4.2.4 (if im not 
> mistaken) with it.
> Now i've upgraded to winXP and am using python 2.5 with wxPython 2.8.1.1.
> The problem Im currently having is that in my code:
>
> from wxPython.wx import *
> from wxPython.grid import *
> from wxPython.html import *
>
> no longer works. An error/warning appears:
>
> Warning (from warnings module):
>   File "C:\stanc_home\WHIP\whip.py", line 7
>     from wxPython.wx import *
> DeprecationWarning: The wxPython compatibility package is no longer 
> automatically generated or activly maintained.  Please switch to the wx 
> package as soon as possible.
>
> Traceback (most recent call last):
>   File "C:\stanc_home\WHIP\whip.py", line 10, in <module>
>     from wxPython.html import *
>   File "C:\Python25\lib\site-packages\wx-2.8-msw-ansi\wxPython\html.py", 
> line 151, in <module>
>     wxHtmlWindowEvent = wx.html.HtmlWindowEvent
> AttributeError: 'module' object has no attribute 'HtmlWindowEvent'
>
> How should I be importing in the new wx?
> Thanks!
> Astan
>
>   


From anton.vredegoor at gmail.com  Fri Mar 16 09:29:56 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Fri, 16 Mar 2007 14:29:56 +0100
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174024633.431427.236920@y66g2000hsf.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
Message-ID: <ete61r$84e$1@news2.zwoll1.ov.home.nl>

n00m wrote:

> 62.5030784639

Maybe this one could save a few seconds, it works best when there are 
multiple occurrences of the same value.

A.

from time import time

def freq(L):
      D = {}
      for x in L:
          D[x] = D.get(x,0)+1
      return D

def test():
     t = time()
     f = file('m4000.txt')
     f.readline()
     L = []
     for line in f:
         L.append(map(int,line.split()))

     q,w,e,r = map(freq,zip(*L))
     sch,h = 0,{}
     for xk,xv in q.iteritems():
       for yk,yv in w.iteritems():
         if h.has_key(xk+yk):
           h[xk+yk] += xv*yv
         else:
           h[xk+yk] = xv*yv

     for xk,xv in e.iteritems():
       for yk,yv in r.iteritems():
         if h.has_key(-(xk+yk)):
           sch += h[-(xk+yk)]*xv*yv

     print sch
     print time()-t

if __name__=='__main__':
     test()



From grahn+nntp at snipabacken.dyndns.org  Fri Mar 23 10:48:32 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 23 Mar 2007 14:48:32 GMT
Subject: "finally" for unit test
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
	<Xns98FC7D56675EEduncanbooth@127.0.0.1>
Message-ID: <slrnf07m4q.3nr.grahn+nntp@frailea.sa.invalid>

On 23 Mar 2007 12:19:15 GMT, Duncan Booth <duncan.booth at invalid.invalid> wrote:
> "killkolor" <gabriel.hase at gmail.com> wrote:
>
>> I have a unittest framework that tests a single function that in turn
>> works with files (takes input and outputs in the same file, no return
>> values).
>
> I would want to split that function into two:
>
> a) one which does the processing, but not working with a file,

Better to make it work with "a file", in the sense that it works with
file-like objects so you can feed and leech it using StringIO.

> b) and one which handles reading and calls the processing function and then 
> writes the file. The function it calls would be passed in as an optional 
> parameter and defaults to function (a)

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From knipknap at gmail.com  Sat Mar 10 15:38:40 2007
From: knipknap at gmail.com (Samuel)
Date: 10 Mar 2007 12:38:40 -0800
Subject: CGI handler: Retrieving POST and GET at the same time
In-Reply-To: <1173555915.830075.201140@h3g2000cwc.googlegroups.com>
References: <1173552765.277146.273730@t69g2000cwt.googlegroups.com>
	<1173555915.830075.201140@h3g2000cwc.googlegroups.com>
Message-ID: <1173559120.057908.153780@8g2000cwh.googlegroups.com>

On Mar 10, 8:45 pm, "Pierre Quentel" <quentel.pie... at wanadoo.fr>
wrote:
> To get the key-value dictionary :
>
>     cgi.parse_qs(os.environ["QUERY_STRING"])

Thanks a lot, it works!

-Samuel



From parsons.nicholas1 at gmail.com  Sun Mar  4 19:39:26 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Sun, 4 Mar 2007 19:39:26 -0500
Subject: Project organization and import
In-Reply-To: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
Message-ID: <1B8F1484-2CFE-408D-A899-FAD905C4D9D0@gmail.com>



> 1a) Module/class collision. I like to use the primary class in a file
> as the name of the file. However this can lead to namespace collisions
> between the module name and the class name. Also it means that I'm
> going to be stuck with the odious and wasteful syntax foo.foo
> everywhere, or forced to use "from foo import *".
>

The normal convention is to use a initial uppercase letter when  
defining a class and using all lowercase letters for naming a file/ 
module.

For example you might have a file called foo.py with the following:

class Foo:
   pass

Now no namespace collision will result when you import the foo file/ 
module.


> 1b) The Pythonic way seems to be to put more stuff in one file, but I
> believe this is categorically the wrong thing to do in large projects.
> The moment you have more than one developer along with a revision
> control system, you're going to want files to contain the smallest
> practical functional blocks. I feel pretty confident saying that "put
> more stuff in one file" is the wrong answer, even if it is the
> Pythonic answer.

Each file is considered a module in python.  You usually don't want  
to throw everything into one module, especially for big projects.   
Breaking your code down into meaningful modules that can be reused in  
other modules.  There is no general rule to follow here as far as  
length of a file/module is concerned.  Use your judgment here.
-------------- next part --------------
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From erikwickstrom at gmail.com  Fri Mar 30 16:56:35 2007
From: erikwickstrom at gmail.com (erikcw)
Date: 30 Mar 2007 13:56:35 -0700
Subject: I can't get multi-dimensional array to work...
Message-ID: <1175288195.207852.150320@p15g2000hsd.googlegroups.com>

Hi,

I'm trying to create a multidimensional data structure.  However, id
doesn't seem to work past the 2nd dimension.

Here is my method:

def endElement(self, name):
        if name == 'row' :
            if not self.data.has_key(self.parent):
                self.data[self.parent] = {}
            elif not self.data[self.parent].has_key(self.child):
                self.data[self.parent][self.child] = []
            self.data[self.parent]
[self.child].append((self.creativeid, self.clicks, self.imps))

I've tried all kinds of different variations, and I keep getting the
same result:

Traceback (most recent call last):
  File "sax.py", line 123, in ?
    parser.parse(open('report.xml'))
  File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
line 109, in parse
    xmlreader.IncrementalParser.parse(self, source)
  File "/usr/lib/python2.4/site-packages/_xmlplus/sax/xmlreader.py",
line 123, in parse
    self.feed(buffer)
  File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
line 216, in feed
    self._parser.Parse(data, isFinal)
  File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
line 315, in end_element
    self._cont_handler.endElement(name)
  File "sax.py", line 51, in endElement
    self.data[self.parent][self.child].append((self.creativeid,
self.clicks, self.imps))
KeyError: u'Pickup Trucks'

I have a lot of php experience - am I accidentally doing a "php thing"
in my code?

Thanks so much for your help!

Erik



From tleeuwenburg at gmail.com  Tue Mar 13 23:42:17 2007
From: tleeuwenburg at gmail.com (tleeuwenburg at gmail.com)
Date: 13 Mar 2007 20:42:17 -0700
Subject: number generator
In-Reply-To: <45f76346.0@entanet>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
Message-ID: <1173843736.982126.211530@l77g2000hsb.googlegroups.com>

It should be possible to enumerate all sets of five numbers which sum
to 50 and randomly select one of them.

Cheers,
-T



From steve at holdenweb.com  Thu Mar 22 11:21:04 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 11:21:04 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <Xns98FB882944CB5duncanbooth@127.0.0.1>
References: <Xns98FB5C293918duncanbooth@127.0.0.1>	<mailman.5447.1174557417.32031.python-list@python.org>
	<Xns98FB882944CB5duncanbooth@127.0.0.1>
Message-ID: <etu6vj$vir$1@sea.gmane.org>

Duncan Booth wrote:
> Steve Holden <steve at holdenweb.com> wrote:
> 
>>> As a matter of interest do PyLint or PyChecker check for this situation 
>>> (chained assignment where the target of an assignment is also a 
>>> subexpression of a later assignment)?
>>>
>> Where's the published syntax for chained assignment?
> 
> http://docs.python.org/ref/assignment.html
> 
> More specifically, since you seem to have missed it, it's the '+' in the 
> line:
> 
> assignment_stmt  	::=  	(target_list "=")+ expression_list
> 
> And then the clear statement "assigns the single resulting object to each 
> of the target lists, from left to right".

Got it, thanks. See my further remarks in my reply to your last.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From attn.steven.kuo at gmail.com  Sat Mar  3 03:08:57 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 3 Mar 2007 00:08:57 -0800
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <1172909337.334188.231650@64g2000cwx.googlegroups.com>

On Mar 2, 2:44 pm, "Shawn Milo" <S... at Milochik.com> wrote:

(snipped)

> I'm attaching both the Perl and Python versions, and I'm open to
> comments on either. The script reads a file from standard input and
> finds the best record for each unique ID (piid). The best is defined
> as follows: The newest expiration date (field 5) for the record with
> the state (field 1) which matches the desired state (field 6). If
> there is no record matching the desired state, then just take the
> newest expiration date.
>
> Thanks for taking the time to look at these.
>


My attempts:

### Perl ###

#!/usr/bin/perl
use strict;
use warnings;

use List::Util qw/reduce/;
use constant {
    STATE  => 1,
    DATE   => 6,
    TARGET => 5,
};

sub keep_best {
    my ($best, $current) = @_;
    if ($current->[STATE] eq $current->[TARGET]) {
       if ($best->[STATE] eq $best->[TARGET]) {
           if ($current->[DATE] gt $best->[DATE]) {
               return 0;
           }
       } else {
           return 0;
       }
    } elsif (
           $best->[STATE] ne $best->[TARGET]
               and
           $current->[DATE] gt $best->[DATE]) {
           return 0;
    }
    return 1;
}


my %input;

# while uses less memory than for:
# the former is an iterator

while (<>)
{
    chomp;
    my @results = split(/\t/, $_);
    my $key = $results[0];
    push @{$input{$key}}, [ @results, $_ ];
}

# while uses less memory than for:
# the former is an iterator

while (my ($key, $aref ) = each %input)
{
    my $best = reduce {
       keep_best( $a, $b ) ? $a : $b
    } @$aref;

    print $best->[-1], "\n";
}


### Python (re-working John's code) ###

import sys

def keep_best(best, current):

    ACTUAL_STATE = 1
    # John had these swapped
    DESIRED_STATE = 5
    EXPIRY_DATE = 6

    keep = True
    if current[ACTUAL_STATE] == current[DESIRED_STATE]:
        if best[ACTUAL_STATE] == best[DESIRED_STATE]:
            if current[EXPIRY_DATE] > best[EXPIRY_DATE]:
                keep = False
        else:
            keep = False
    else:
        if (best[ACTUAL_STATE] != best[ACTUAL_STATE]
        and current[EXPIRY_DATE] > best[EXPIRY_DATE]):
            keep = False
    return keep

def process_file(opened_file=sys.stdin):

    PIID = 0
    recs = {}

    for line in opened_file:
        line = line.rstrip('\n')
        row = line.split('\t')
        row.append(line)
        piid = row[PIID]
        if piid not in recs:
            recs[piid] = []
        recs[piid].append(row)

    for piid in recs:
        best = reduce(lambda b, c: keep_best(b, c) and b or c,
recs[piid])
        print best[-1]

if __name__ == "__main__":
    process_file()


# "reduce" seems to be Lispish, Pythonic, and Perlish!

--
Hope this helps,
Steve




From shawn.mcgrath at gmail.com  Mon Mar 19 15:17:39 2007
From: shawn.mcgrath at gmail.com (Shawn  McGrath)
Date: 19 Mar 2007 12:17:39 -0700
Subject: Boost Python properties/getter functions for strings
In-Reply-To: <1174322949.392096.227650@e1g2000hsg.googlegroups.com>
References: <1174312916.127830.303550@o5g2000hsb.googlegroups.com>
	<1174320047.732767.101930@e65g2000hsc.googlegroups.com>
	<1174322444.663045.82200@d57g2000hsg.googlegroups.com>
	<1174322949.392096.227650@e1g2000hsg.googlegroups.com>
Message-ID: <1174331859.404590.165140@l75g2000hse.googlegroups.com>

On Mar 19, 12:49 pm, "Jon Clements" <jon... at googlemail.com> wrote:
> On 19 Mar, 16:40, "Shawn  McGrath" <shawn.mcgr... at gmail.com> wrote:
>
> > On Mar 19, 12:00 pm, "Shawn  McGrath" <shawn.mcgr... at gmail.com> wrote:
>
> > > I forgot to mention, getname is defined as:
> > > const std::string &Entity::getName() const;
>
> > After more reading I found the copy_const_reference, and replaced:
> >  boost::python::return_internal_reference<>());
> > with:
>
> > boost::python::return_value_policy<boost::python::copy_const_reference>());
>
> > and it fixed my problem.  Is there any downside to using
> > copy_const_reference over return_internal_reference?
>
> You might get some answers here; if not, can I suggesthttp://mail.python.org/mailman/listinfo/c++-sig? I think a lot of the
> Boost.Python developers hang around on that list.
>
> hth,
>
> Jon.

Cool thanks a lot.

The problem is actually due to python's strings being immutable (I
knew this, but I thought returning const std::string& would do it).
return_internal_reference<> works for other pointers/references, just
not strings.

(I just answered it so if it gets searched later on people will find
the solution)

-Shawn.



From bbxx789_05ss at yahoo.com  Wed Mar 28 17:01:04 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 28 Mar 2007 14:01:04 -0700
Subject: manually implementing staticmethod()?
Message-ID: <1175115664.288706.183390@p77g2000hsh.googlegroups.com>

Hi,

Can someone show me how to manually implement staticmethod()?  Here is
my latest attempt:
----------------
def smethod(func):

        def newFunc():
                pass

        def newGet():
                print "new get"

        newFunc.__get__ = newGet

        return newFunc

class Test(object):

        def show(msg):
                print msg
        show = smethod(show)


Test.show("hello")
--------------
...but I keep getting the error:

TypeError: unbound method newFunc() must be called with Test instance
as first argument (got str instance instead)

I think I need to intercept the function's __get__() method in order
to block creation of the method object, which requires that the
unbound method call provide an instance.



From B.Ogryczak at gmail.com  Thu Mar 29 12:16:48 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 29 Mar 2007 09:16:48 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <euenc1$fks$1@nemesis.news.tpi.pl>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<euenc1$fks$1@nemesis.news.tpi.pl>
Message-ID: <1175185008.710734.181110@l77g2000hsb.googlegroups.com>

On 28 mar, 23:36, Jarek Zgoda <jzg... at o2.usun.pl> wrote:
> Carl Friedrich Bolz napisa?(a):
>
> > Welcome to the PyPy 1.0 release - a milestone integrating the results
> > of four years of research, engineering, management and sprinting
> > efforts, concluding the 28 months phase of EU co-funding!
>
> So it took 4 yars of work and over 2 yaers of consumption of EU funds,
> yeah, great.

> Could anybody explain, what this gives to Python and its users? Would
> we, eventually, get GIL-free VM, that is capable to consume all
> available power of multicore processors?

http://codespeak.net/pypy/dist/pypy/doc/stackless.html

> Or, maybe, we'll get something
> special, I am unable to dream of? Or is it purely academic project to
> create Python VM in Python?

RTFM.




From barnaclejive at gmail.com  Sun Mar 25 14:04:53 2007
From: barnaclejive at gmail.com (mkppk)
Date: 25 Mar 2007 11:04:53 -0700
Subject: Anyone know of a MICR parser algorithm written in Python?
In-Reply-To: <1174804250.210573.262890@p15g2000hsd.googlegroups.com>
References: <1174763132.786644.161500@y66g2000hsf.googlegroups.com>
	<1174776923.618895.232630@y80g2000hsf.googlegroups.com>
	<1174780369.721874.250280@e65g2000hsc.googlegroups.com>
	<1174804250.210573.262890@p15g2000hsd.googlegroups.com>
Message-ID: <1174845893.892163.99880@n76g2000hsh.googlegroups.com>

On Mar 25, 12:30 am, "Paul McGuire" <p... at austin.rr.com> wrote:
> On Mar 24, 6:52 pm, "mkppk" <barnaclej... at gmail.com> wrote:
>
> > Its just that I would rather not reinvent the wheel (or read old C
> > code)..
>
> Wouldn't we all!
>
> Here is the basic structure of a pyparsing solution.  The parsing part
> isn't so bad - the real problem is the awful ParseONUS routine in C.
> Plus things are awkward since the C program parses right-to-left and
> then reverses all of the found fields, and the parser I wrote works
> left-to-right.  Still, this grammar does most of the job.  I've left
> out my port of ParseONUS since it is *so* ugly, and not really part of
> the pyparsing example.
>
> -- Paul
>
> from pyparsing import *
>
> # define values for optional fields
> NoAmountGiven  = ""
> NoEPCGiven     = ""
> NoAuxOnusGiven = ""
>
> # define delimiters
> DOLLAR = Suppress("$")
> T_ = Suppress("T")
> A_ = Suppress("A")
>
> # field definitions
> amt = DOLLAR + Word(nums,exact=10) + DOLLAR
> onus = Word("0123456789A- ")
> transit = T_ + Word("0123456789-") + T_
> epc = oneOf( list(nums) )
> aux_onus = A_ + Word("0123456789- ") + A_
>
> # validation parse action
> def validateTransitNumber(t):
>     transit = t[0]
>     flds = transit.split("-")
>     if len(flds) > 2:
>         raise ParseException(0, "too many dashes in transit number",
> 0)
>     if len(flds) == 2:
>         if len(flds[0]) not in (3,4):
>             raise ParseException(0, "invalid dash position in transit
> number", 0)
>     else:
>         # compute checksum
>         ti = map(int,transit)
>         ti.reverse() # original algorithm worked with reversed data
>         cksum = 3*(ti[8]+ti[5]+ti[2]) + 7*(ti[7]+ti[4]+ti[1]) +
> ti[6]+ti[3]+ti[0]
>         if cksum%10 != 0:
>             raise ParseException(0, "transit number failed checksum",
> 0)
>     return transit
>
> # define overallMICRformat, with results names
> micrdata =
> Optional(aux_onus,default=NoAuxOnusGiven).setResultsName("aux_onus") +
> \
>             Optional(epc,default=NoEPCGiven).setResultsName("epc") +\
>
> transit.setParseAction(validateTransitNumber).setResultsName("transit")
> + \
>             onus.setResultsName("onus") + \
>             Optional(amt,default=NoAmountGiven).setResultsName("amt")
> + \
>             stringEnd
>
> import re
>
> def parseONUS(tokens):
>     tokens["csn"] = ""
>     tokens["tpc"] = ""
>     tokens["account"] = ""
>     tokens["amt"] = tokens["amt"][0]
>     onus = tokens.onus
>     # remainder omitted out of respect for newsreaders...
>     # suffice to say that unspeakable acts are performed on
>     # onus and aux_onus fields to extract account and
>     # check numbers
>
> micrdata.setParseAction(parseONUS)
>
> testdata = file("checks.csv").readlines()[1:]
> tests = [(flds[1],flds) for flds in map(lambda
> l:l.split(","),testdata)]
> def verifyResults(res,csv):
>     def match(x,y):
>         print (x==y and "_" or "X"),x,"=",y
>
> Ex,MICR,Bank,Stat,Amt,AS,TPC,TS,CSN,CS,ACCT,AS,EPC,ES,ONUS,OS,AUX,AS,Tran,TS
> = csv
>     match(res.amt,Amt)
>     match(res.account,ACCT)
>     match(res.csn,CSN)
>     match(res.onus,ONUS)
>     match(res.tpc,TPC)
>     match(res.epc,EPC)
>     match(res.transit,Tran)
>
> for t,data in tests:
>     print t
>     try:
>         res = micrdata.parseString(t)
>         print res.dump()
>         if not(data[0] == "No"):
>             print "Passed expression that should have failed"
>         verifyResults(res,data)
>     except ParseException,pe:
>         print "<parse failed> %s" % pe.msg
>         if not(data[0] == "Yes"):
>             print "Failed expression that should have passed"
>     print


Great, thanks for taking a look Paul. I had never tried to use
pyparsing before. Yea, the ONUS field is crazy, don't know why there
is no standard for it.



From __peter__ at web.de  Fri Mar  2 05:34:49 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Mar 2007 11:34:49 +0100
Subject: decimal and context objects!
References: <1172830118.276246.101820@30g2000cwc.googlegroups.com>
Message-ID: <es8uhd$smg$02$2@news.t-online.com>

MooMaster wrote:

> Hey guys, I'm trying to do some black magic voodoo and it's a little
> late, so forgive me if this question seems obvious or has been asked
> before. I tried doing a search on context objects and didn't find
> anything that popped out, and I'm too tired to keep digging.
> 
> I'm making a little program that is trying to do weird and sexy things
> by fully leveraging the power of all the built-in beauty of Python. I
> was trying to play around with the new features added into Python 2.5,
> and ran into an unexpected issue...check this out:
> 
>>>> moo = lambda x, y :
>>>> decimal.Context(3).sqrt(decimal.Context(3).power(x,2) +
>>>> decimal.Context(3).power(y,2)) moo
> <function <lambda> at 0x02CD0EB0>
>>>> row = [1,2,3,4,5]
>>>> weight_vector = .00556
>>>> moo(sum(row), weight_vector)
> Traceback (most recent call last):
>   File "<pyshell#5>", line 1, in <module>
>     moo(sum(row), weight_vector)
>   File "<pyshell#1>", line 1, in <lambda>
>     moo = lambda x, y :
> decimal.Context(3).sqrt(decimal.Context(3).power(x,2) +
> decimal.Context(3).power(y,2))
>   File "C:\Python25\lib\decimal.py", line 2662, in power
>     return a.__pow__(b, modulo, context=self)
> TypeError: wrapper __pow__ doesn't take keyword arguments
> 
> I have no idea what keyword argument is getting passed to __pow__,
> anyone know what's going on?

Weird implementation hacks distorting error messages :-)
Context.power() expects a Decimal instance as its first argument:

>>> from decimal import *
>>> ctx = getcontext()
>>> ctx.power(10, 2)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python2.5/decimal.py", line 2662, in power
    return a.__pow__(b, modulo, context=self)
TypeError: wrapper __pow__ doesn't take keyword arguments
>>> ctx.power(Decimal("10"), 2)
Decimal("100")

Peter


From __peter__ at web.de  Fri Mar 30 05:32:58 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Mar 2007 11:32:58 +0200
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <euilg3$stf$03$1@news.t-online.com>

DE wrote:

> Hello,
> 
> Here is what I do in C++ and can not right now in python :
> 
> pushMatrix()
> {
>      drawStuff();
> 
>      pushMatrix();
>      {
>             drawSomeOtherStuff()
>      }
>      popMatrix();
> }
> popMatrix();
> 
> The curly brackets have no functional meaning but increase the
> readability significantly. I want to be able to do the same thing in
> python. Since curly brackets are not available and indenting without
> an if or while conditional doesn't work, I have started to question if
> this is possible in python at all.
> 
> Any ideas ?

You could use

if True:
    # do stuff

but I have no sympathy for such self-inflicted noise.

With Python 2.5 you can do even better -- you can emulate what should have
been RAII in your C++ example in the first place:

from __future__ import with_statement

from contextlib import contextmanager

def push_matrix():
    print "push"

def pop_matrix():
    print "pop"

@contextmanager
def matrix():
    m = push_matrix()
    try:
        yield m
    finally:
        pop_matrix()

with matrix():
    print "do stuff"
    with matrix():
        print "do more stuff"

Peter


From lobais at gmail.com  Fri Mar  2 20:34:25 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 02:34:25 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de> <pan.2007.03.02.23.12.08@gmail.com>
	<1172877633.676612.141450@31g2000cwt.googlegroups.com>
	<pan.2007.03.02.23.51.54@gmail.com>
	<1172881667.825628.93490@t69g2000cwt.googlegroups.com>
Message-ID: <pan.2007.03.03.01.34.16@gmail.com>

Den Fri, 02 Mar 2007 16:27:47 -0800 skrev MonkeeSage:

> On Mar 2, 5:51 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
>> I guess the thing is that I'd have to create a new callable no matter
>> how, as it is the only way to bring the extra variables into the
>> getValue function when called by sort.
> 
> Yes, but you don't have to create it every time you call sortMoves...
> 
> def sortKey(move):
>     return getMoveValue(board, table, ply, move)
> 
> def sortMoves(board, table, ply, moves):
>     moves.sort(key=sortKey, reverse=True) return moves

Well, you'd have to define the function inside the sortMoves function, as 
it is where the variables exists.

def sortMoves(board, table, ply, moves):
    def sortKey(move):
        return getMoveValue(board, table, ply, move)
    moves.sort(key=sortKey, reverse=True) return moves

Wouldn't that make it create the callable at each call?


From hitesh287 at gmail.com  Mon Mar 12 14:12:15 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 12 Mar 2007 11:12:15 -0700
Subject: glob.glob output
In-Reply-To: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
References: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
Message-ID: <1173723135.378607.44160@h3g2000cwc.googlegroups.com>

On Mar 12, 1:58 pm, "Hitesh" <hitesh... at gmail.com> wrote:
> import string
> import os
>
> f = open ("c:\\servername.txt", 'r')
> linelist = f.read()
>
> lineLog = string.split(linelist, '\n')
> lineLog = lineLog [:-1]
> #print lineLog
> for l in lineLog:
>     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
>     glob.glob(path1)
>
> When I run above from command line python, It prints the output of
> glob.glob but when I run it as a script, it does not print
> anything.... I know that there are files like xtRec* inside those
> folders.. and glob.glob does spits the path if run from python command
> line.
>
> I tried something like this but did not work:
> for l in lineLog:
>     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
>     xtRec = glob.glob(path1)
>     print xtRec
>
> No results...
>
> xtRec = []
> for l in lineLog:
>     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
>     xtrec = glob.glob(path1)
> print xtRec
>
>  No luck here either.
>
> Seems like I am doing here something reallt silly mistake..
>
> Thank you,
> hj


I am using pythonWin and command line means Interactive Shell.




From aleax at mac.com  Fri Mar  9 02:00:06 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 8 Mar 2007 23:00:06 -0800
Subject: Python books?
References: <mailman.4836.1173410475.32031.python-list@python.org>
Message-ID: <1huohke.qr9btd1mo633vN%aleax@mac.com>

Tommy Nordgren <tommy.nordgren at comhem.se> wrote:

> Could some kind soul please recommend a few text books on Python 2.5
> and it's class library?

I believe recent books on Python (such as "Python for Dummies" and the
second edition of "Core Python Programming") do cover 2.5; I do know
that the 2nd edition of Python in a Nutshell tries to do so, but falls
quite a bit short on a number of important new additions to the library
(I had to close the book a tad too early to really do them justice,
sigh).


Alex


From andi.clemens at gmx.net  Thu Mar  1 14:40:18 2007
From: andi.clemens at gmx.net (Andi Clemens)
Date: Thu, 01 Mar 2007 20:40:18 +0100
Subject: How to update DNS record
References: <es5v6v$pv8$1@online.de> <45e71210$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <es7a73$ace$1@online.de>

Martin P. Hellwig wrote:

> I'll looked at the perl function you mentioned and it seems to me (but
> I'm not a pearl coder) that it uses the dynamic update procedure, which
> is explained by the RFC 2136 (Bjoern mentioned that already).
> 
> So I googled for "Python DNS dynamic update" and in the results the
> following site looked promising, http://www.dnspython.org/.
> 
> hth
> 
> --
> mph


It's working!!!
Yeah!
I don't know why I didn't get this the first time I tried dnspython, but now
its working! And it's so easy, 3 lines of code:

def make_dns_entry(pix):
     update = dns.update.Update(_DOMAIN)
     update.replace(pix.name, 3600, 'a', pix.outbound)
     response = dns.query.tcp(update, _NAMESERVER)

Thank you for all your help!

Andi


From iddw at hotmail.com  Fri Mar 16 10:27:14 2007
From: iddw at hotmail.com (Dave Hansen)
Date: 16 Mar 2007 07:27:14 -0700
Subject: Mastering Python
In-Reply-To: <1174052358.486071.163280@e65g2000hsc.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
Message-ID: <1174055234.083390.160490@e1g2000hsg.googlegroups.com>

On Mar 16, 8:39 am, "Paul McGuire" <p... at austin.rr.com> wrote:
[...]
> Stop thinking about *how* to start and *just start*.  Python is pretty

Indeed.  Of all the fortune cookies I've eaten over the years, I've
saved (and taped to my monitor) only one fortune.  It reads:

  Begin...the rest is easy.

Regards,
   -=Dave



From yinglcs at gmail.com  Fri Mar 30 22:21:53 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 30 Mar 2007 19:21:53 -0700
Subject: loading a url using urllib2
Message-ID: <1175307712.978223.225180@n76g2000hsh.googlegroups.com>

I have the following code to load a url (address).

When I have a url like this,

http://www.testcom.co.uk/dev_12345/www.cnn.com

i get an error "Failed to open http://www.testcom.co.uk/dev_12345/www.cnn.com".
Is there something wrong with my URL? or something wrong with my code?

Thank you for any help.

cj = cookielib.LWPCookieJar()

  opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
    urllib2.install_opener(opener)


    txheaders = {'User-agent': 'Mozilla/4.0 (compatible; MSIE 5.5;
Windows NT)'}
    try:
        print "address", address
        print "txdata", txdata
        print "txheaders", txheaders
        req = Request(address, txdata, txheaders)
        handle = urlopen(req)
    except IOError, e:
        print address
        print 'Failed to open %s' % address
        data = ""



From http  Thu Mar  8 00:03:13 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 21:03:13 -0800
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
Message-ID: <7xtzww5nu6.fsf@ruckus.brouhaha.com>

"alex23" <wuwei23 at gmail.com> writes:
> > Hosting providers and distro
> > makers aren't concerned over whether Python works.  They
> > care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
> > Ask them.
> 
> Do you have any real experience with recent linux distros? Or with any
> _real_ hosting providers?

Care to name a "real" hosting provider that cares whether Python works?


From Emile.Boudreau at cognos.com  Tue Mar 20 10:45:02 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Tue, 20 Mar 2007 10:45:02 -0400
Subject: Subject line with smtplib.sendmail()
Message-ID: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com>

Hey,
	I'm trying to send mail from my server to my machine with test
results. I can send the email no problem however, the email doesn't
contain a "recipient list" or a "subject line". I was wondering how
would I go about getting the information on the actual "To" and
"Subject" lines so that I know to whom the email was sent and the
subject line without opening the email?

Thanks in advance for the help.

Emile Boudreau
 
     This message may contain privileged and/or confidential information.  If you have received this e-mail in error or are not the intended recipient, you may not use, copy, disseminate or distribute it; do not open any attachments, delete it immediately from your system and notify the sender promptly by e-mail that you have done so.  Thank you.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070320/8ed1ae1f/attachment.html>

From rNOSPAMon at flownet.com  Thu Mar  1 12:46:29 2007
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Thu, 01 Mar 2007 09:46:29 -0800
Subject: Python on a mac: how to build pythonw?
Message-ID: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>

I'm trying to run the Python examples distributed with XCode and they 
all give me the same error:

Traceback (most recent call last):
  File "checktext.py", line 35, in <module>
    main()
  File "checktext.py", line 8, in main
    pathname = EasyDialogs.AskFileForOpen(message='File to check 
end-of-lines in:')
  File "/usr/local/lib/python2.5/plat-mac/EasyDialogs.py", line 650, in 
AskFileForOpen
    _interact()
  File "/usr/local/lib/python2.5/plat-mac/EasyDialogs.py", line 53, in 
_interact
    AE.AEInteractWithUser(50000000)
MacOS.Error: (-1713, 'no user interaction is allowed')

Googling reveals that the answer is to use pythonw, but there is no such 
thing installed on my system:

[ron at mickey:~]$ pythonw
-bash: pythonw: command not found

Apparently, pythonw didn't get built when I installed Python 2.5, and I 
can't find any instructions on how to build it.  (The installation 
instructions don't seem to mention it.)

If anyone could spare a clue I would be most grateful.

Thank,
rg


From __peter__ at web.de  Wed Mar 21 13:26:57 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 21 Mar 2007 18:26:57 +0100
Subject: Delete a function
References: <1174494159.024910.151540@l75g2000hse.googlegroups.com>
	<mailman.5405.1174495228.32031.python-list@python.org>
	<1174496687.142300.205350@n76g2000hsh.googlegroups.com>
Message-ID: <etrpov$a7s$02$1@news.t-online.com>

gtb wrote:

> On Mar 21, 11:37 am, Steve Holden <s... at holdenweb.com> wrote:
>> gtb wrote:
>> > After a function has been imported to a shell how may it be deleted so
>> > that after editing it can reloaded anew?
>>
>> Use the built-in reload() function to reload the module that defines the
>> function.
>>
>> regards
>>   Steve
>> --
>> Steve Holden       +44 150 684 7255  +1 800 494 3119
>> Holden Web LLC/Ltd          http://www.holdenweb.com
>> Skype: holdenweb    http://del.icio.us/steve.holden
>> Recent Ramblings      http://holdenweb.blogspot.com
> 
> Thanks, tried that now and get nameError: with the following.
> 
> import sys
> sys.path.append("c:\maxq\testScripts")

That's an interesting directory name:

>>> print "c:\maxq\testScripts"
c:\maxq estScripts

 
> from CompactTest import CompactTest
> from compactLogin import dvlogin

The above line puts dvlogin into the current namespace, not compactLogin;
therefore
 
> reload(compactLogin)

compactLogin is undefined in the reload() call. You need

import compactLogin # still the old module because it's in the module cache
reload(compactLogin)
from compactLogin import dvlogin # update the function
del compactLogin # optional

Peter



From deets at nospam.web.de  Wed Mar  7 04:11:18 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 Mar 2007 10:11:18 +0100
Subject: How to check whether file is open or not
References: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
Message-ID: <557dtnF23i4o2U1@mid.uni-berlin.de>

Ros wrote:

> There are 10 files in the folder. I wish to process all the files one
> by one. But if the files are open or some processing is going on them
> then I do not want to disturb that process. In that case I would
> ignore processing that particular file and move to next file.
> 
> How can I check whether the file is open or not?
> 
> I tried os.stat and os.access but I am not getting the expected
> results.
> Also I checked in IO exceptions, IO error handler doesnt raise any
> error if the file is open.
> There are some options to check but they are platform dependent (works
> only with unix)

You can't do that, at least not in a platform agnostic way, and usually not
without cooperation of the file-modifying processes.

Diez


From arnodel at googlemail.com  Thu Mar  8 17:01:43 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 8 Mar 2007 14:01:43 -0800
Subject: Dyanmic import of a class
In-Reply-To: <1173388141.820852.98880@j27g2000cwj.googlegroups.com>
References: <1173388141.820852.98880@j27g2000cwj.googlegroups.com>
Message-ID: <1173391303.350661.120820@v33g2000cwv.googlegroups.com>

On Mar 8, 9:09 pm, "rh0dium" <steven.kl... at gmail.com> wrote:
[snip]
> for mod in listdir():
>    __import__(mod)
>    a=mod()
>    a.dosomething()  # This is a function which each class shares.
>
> Can anyone help?

You are not using __import__ correctly.  Perhaps reading the doc would
be a good start:
http://docs.python.org/lib/built-in-funcs.html

For example to import the module defined in 'foo.py' you would do
foo = __import__('foo')
Then your class foo would be accessible as foo.foo

HTH

--
Arnaud



From mitko at qlogic.com  Thu Mar 29 14:56:54 2007
From: mitko at qlogic.com (Mitko Haralanov)
Date: Thu, 29 Mar 2007 11:56:54 -0700
Subject: Question about details of __import__
In-Reply-To: <op.tpyrm8p5x6zn5v@gabriel2.softlabbsas.com.ar>
References: <20070329104233.2129d267@opal.pathscale.com>
	<op.tpyrm8p5x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <20070329115654.5455dd96@opal.pathscale.com>

On Thu, 29 Mar 2007 15:43:46 -0300
"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> Surely there is a ./resources/__init__.py too?

There sure is:
./resources/__init__.py is:
__all__ = ['simple', 'other']

> You may check if this is the case, looking at sys.modules

I did look at sys.modules but I wasn't sure what to look for. There was
a log module in the list but what else should I look for?

> Anyway you could import the package and lookup the module inside
> using getattr:
> 
> import resources
> name = "simple"
> module = getattr(resources, name)
> self.rs = module.Resource()

Since the ./resources/__init__.py does not actually import any of the
modules below it, this trick won't work but just for an experiment,
I'll change the code and try it.

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com

==========================================
Disraeli was pretty close: actually, there are Lies, Damn lies,
Statistics, Benchmarks, and Delivery dates.


From olsonas at gmail.com  Wed Mar 14 16:32:06 2007
From: olsonas at gmail.com (Drew)
Date: 14 Mar 2007 13:32:06 -0700
Subject: Converting a list to a dictionary
In-Reply-To: <45f8583d$0$10407$426a34cc@news.free.fr>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
	<45f8583d$0$10407$426a34cc@news.free.fr>
Message-ID: <1173904326.037621.10390@n76g2000hsh.googlegroups.com>

On Mar 14, 4:52 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:

> res_dict = dict((r.get_id(), r) for r in res_list)

I'm using Python2.5 and it seems that this only gives me a hash with
the first id and first record. Am I doing something wrong?

>>> class Person():
...     def __init__(self):
...             self.id = 5
...
>>> mylist = []
>>> for i in range(100):
...     mylist.append(Person())
...
>>> mydict = dict((r.id,r) for r in mylist)
>>> mydict
{5: <__main__.Person instance at 0x00A99EE0>}
>>>



From grante at visi.com  Sun Mar 11 18:11:19 2007
From: grante at visi.com (Grant Edwards)
Date: Sun, 11 Mar 2007 22:11:19 -0000
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<12v3ksihos7uj7a@corp.supernews.com>
	<1173477047.467568.298090@p10g2000cwp.googlegroups.com>
	<2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<1173488215.913014.130190@h3g2000cwc.googlegroups.com>
	<mailman.4896.1173517512.32031.python-list@python.org>
Message-ID: <12v8vk7sabb2i84@corp.supernews.com>

On 2007-03-10, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
><isr...elr at googlemail.com> wrote:
>
>> Oh, thanks for the advice then. And as for Grant..look forward to
>> seeing more of your posts.
>
> YOW! - some recognition at last!

:)

I see somebody pays attention to sigs -- which, BTW, are old quotes
from the Zippy the Pinhead comic strip. www.zippythepinhead.com

-- 
Grant



From jantod at gmail.com  Sun Mar 11 08:32:53 2007
From: jantod at gmail.com (Janto Dreijer)
Date: 11 Mar 2007 05:32:53 -0700
Subject: threading and iterator crashing interpreter
In-Reply-To: <55iafnF24d6qgU3@mid.individual.net>
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<55iafnF24d6qgU3@mid.individual.net>
Message-ID: <1173616373.805377.42350@t69g2000cwt.googlegroups.com>

On Mar 11, 2:20 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Janto Dreijer wrote:
> > I have been having problems with the Python 2.4 and 2.5
> > interpreters on both Linux and Windows crashing on me.
>
> I don't understand -- does the interpreter crash (segfault) or is
> just your program terminating due to unhandled exceptions?

Segfault.



From arnodel at googlemail.com  Mon Mar  5 17:15:03 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 5 Mar 2007 14:15:03 -0800
Subject: Make instance global -- possbile?
In-Reply-To: <1173132019.219765.19760@h3g2000cwc.googlegroups.com>
References: <1173132019.219765.19760@h3g2000cwc.googlegroups.com>
Message-ID: <1173132903.362871.72520@p10g2000cwp.googlegroups.com>

On Mar 5, 10:00 pm, ero... at gmail.com wrote:
> Rather new to OOP in Python...
>
> I'm writing an app where several objects need to access and change the
> state of ONE instance.
>
> I could of course instantiate the instance and then pass it along the
> objects, but that's cumbersome, especially as it would need to be
> "passed through" classes that don't really need it.
>
> I would be happy if I could just instantiate the object in the main
> module and declare it global, but classes are in different modules so
> I guess that won't work.
>
> Have looked a bit into singletons -- is that the way to go?

Put your 'global' stuff into a module and use import?

--
Arnaud



From aleax at mac.com  Wed Mar 28 10:47:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 28 Mar 2007 07:47:08 -0700
Subject: Why doesnt __getattr__ with decorator dont call __get_method in
	decorator
References: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>
Message-ID: <1hvodh5.h5rkrahq0el8N%aleax@mac.com>

glomde <tbrkic at yahoo.com> wrote:

> Hi,
> 
> I tried to write a decorator for that should be for methods but for
> some reasons
> it doens seem to work when you try to do it on the __getattr__ method
> in a class.
> Could anybody give some hints why this is?
...
> a.test # This doesnt call the __get__ !!!
> 
> Output
> __get__ <__main__.MyClass1 object at 0x4012baac>
> hello1
> Traceback (most recent call last):
>   File "/home/tonib/test.py", line 27, in ?
>     a.test
>   File "/home/tonib/test.py", line 12, in __call__
>     return self.func(self.instance, *args, **kwds)
> AttributeError: 'decoratorTest' object has no attribute 'instance'

What Python release are you using?  With Python 2.5, your code gives me
instead:

>>> a.test
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "a.py", line 11, in __call__
    return self.func(self.instance, *args, **kwds)
TypeError: __getattr__() takes exactly 2 arguments (3 given)
>>> 

so there would seem to be some "mis-alignment" wrt the problems you
observe...


Alex


From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 13:08:24 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 21 Mar 2007 04:08:24 +1100
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
	<pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
	<1hv9lqf.19nfi5y1hv1y4gN%aleax@mac.com>
Message-ID: <pan.2007.03.20.17.08.22.579017@REMOVE.THIS.cybersource.com.au>

On Tue, 20 Mar 2007 08:27:07 -0700, Alex Martelli wrote:

> You should always use new-style classes in order to avoid having to stop
> and make a decision each time you code a class -- having to stop and ask
> yourself "do I need any of the many extra features of new-style classes
> here, or will legacy classes suffice?" each and every time.

I can sympathize with your argument. I have taught myself to _always_
indicate when turning the car, even when I don't need to. I do it without
thinking, even when turning from my own driveway into my garage (much to
my wife's amusement). And that way, I don't have to think on the road "do
I need to indicate now or not?", I just do it.

Rather than keep arguing my case (life is short...) I'll just mention that
both Fredrik Lundh and Aahz were very dismissive of the suggestion that
people should stop using classic classes back in July 2005.

http://www.thescripts.com/forum/thread25853.html

e.g. Aahz wrote: "There's a big difference between being gung-ho on
new-style classes and telling people to stop using old-style classes."

Have they changed their mind since then? Not that I'm suggesting that
their opinions outweigh Alex's, but I'm not sure that the situation
vis-a-vis classes has changed that much since 2005. If it has, perhaps I
should be revising my opinion too.


-- 
Steven.



From tew24 at spam.ac.uk  Wed Mar 21 09:44:58 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 13:44:58 +0000
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
Message-ID: <etrcsq$2rj$1@gemini.csx.cam.ac.uk>

flit wrote:
> 1 - There is a way to make some program in python and protects it? I
> am not talking about ultra hard-core protection, just a simple one
> that will stop 90% script kiddies.

Put it in an executable? It's more hidden than protected, but it will stop a
fair few non-experts.  I use and have been happy with pyinstaller, though
there are other options.  I use it more for ease of distribution to
non-techy users, but it's also a simply way to hide your code.

> 2 - If I put the code in web like a web service, how can I protect my
> code from being ripped? There is a way to avoid someone using my site
> and ripping the .py files?

Configure your web-server properly and it will never serve up the .py files,
only the results generated by them.  I've not done it with Python, but I
have set up a similar thing with Apache and XSLT where it will only give
the generated data, not the code which created it.  This is true even if
there's an error in the code - it will just give "HTTP 500 Internal Server
Error" and dump something a bit more useful to its error log.

-- 
I'm at CAMbridge, not SPAMbridge


From parsons.nicholas1 at gmail.com  Sat Mar  3 21:55:39 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Sat, 3 Mar 2007 21:55:39 -0500
Subject: pop method question
In-Reply-To: <1172968335.511875.255750@p10g2000cwp.googlegroups.com>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
Message-ID: <92823003-96E3-43E4-9CE1-FE70354A637E@gmail.com>

Hi Raymond,

Thank you for your clarification below.  I was just using "remove"  
and "delete" as possible alternatives to the name "pop" without much  
contemplation.  Like you say below, it begs the question as to why  
not have two separate operations for dictionaries (retrieval of value  
from key followed by deletion of key) instead of one method.

I'm not sure I agree with you said about the pedantic usage of pop.   
I would rather have a term mean one thing instead of several causing  
ambiguity.  Just from my computer science background when I see pop 
(), I think of a stack data structure.  Why muddle the waters by  
introducing another meaning for the term?  There are plenty of other  
words to use that could describe the behavior exhibited by the  
dictionary operation of removing a key and returning its value.  The  
notion of a stack and pop() and push() methods for it are very  
important from a historical perspective and is not just some fad.

But then again, there are other examples of ambiguity in the python  
language such as allowing operators like '+' to be overloaded.  Why  
not just have a "add()" method like Java?  Of course Java does cheat  
a little by overloading the '+' operator for string objects but that  
is a built-in feature of language.  Also some people find '+' more  
appealing to the eye than a method call like add() in their code.

Even in the case of C, we have some ambiguity with the dangling if  
statement.  So I guess you can't win for trying :).

Just call me a purist and think of me as someone who likes  
consistency.  Python is here to stay and no language is perfect...

--Nick

On Mar 3, 2007, at 7:32 PM, Raymond Hettinger wrote:

> [Nicholas Parsons]
>>  Dictionaries in Python have no order but are sequences.
>> Now, does anyone know why the python core has this pop method
>> implemented for a dictionary type?
>>
>> I realize that in this context it is used for removing a specific key
>> from the current dictionary object.  But why call it pop and not
>> something more intuitive like remove or delete?
>
> The naming for pop() method followed from the naming of the previously
> existing popitem() method.  Neither "remove" nor "delete" would have
> been a good name for a method that looked-up and returned a value as
> well as mutating the dictionary.  The word "pop" on the other hand
> strongly suggests both retrieval and mutation.
>
> The notion that "pop" is only defined for stack operations is somewhat
> pedantic.  We have also successfully used the name for sets, dicts,
> and deques (success meaning that most people just "get it" and are
> able to learn, use, read the name without difficultly).
>
> The rationale for the pop() method was that the pattern "v=d[k]; del
> d[k]" could be collapsed to a single call, eliminating a two
> successive look-ups of the same key.  Looking back, this rationale is
> questionable because 1) the second lookup is not expensive because the
> first lookup put the relevant hash entries in the cache, and 2) the
> lookup/delete pattern for dictionaries does not seem to arise often in
> practice (it does come-up every now and then in the context of set
> operations).
>
> There was also a notion that threaded programming would benefit by
> having lookup-then-delete as an atomic transaction.  It is unknown to
> me whether that purported benefit has ever been realized.
>
>
> Raymond Hettinger
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  8 12:33:38 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 08 Mar 2007 18:33:38 +0100
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05>
Message-ID: <55avniF23jpl2U1@mid.individual.net>

Alan Isaac wrote:

> I am brand new to pylint.
> As a tab user, I want the tabs warning turned off.
> How?

Advice: Don't. IIRC it's planned in future Python versions that TABs
aren't supported for indentation.

Regards,


Bj?rn

-- 
BOFH excuse #401:

Sales staff sold a product we don't offer.



From bignose+hates-spam at benfinney.id.au  Thu Mar  8 23:42:50 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 09 Mar 2007 15:42:50 +1100
Subject: TitleCase, camelCase, lowercase (was: Where to "import"?)
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
	<1173393063.705376@jubilee.claranet.pt>
	<45f09905$0$28886$426a34cc@news.free.fr>
	<1173413376.191416.30990@s48g2000cws.googlegroups.com>
	<op.towmn6uwx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <87ps7jxc1h.fsf_-_@benfinney.id.au>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:

> Class names should be CamelCase.

Note that the term "camel case" has ambiguous usage. Some use it to
refer to *both* of "nameWithSeveralWords" and "NameWithSeveralWords".

I prefer to use the term "title case" to refer unambiguously to
"NameWithSeveralWords", leaving the term "camel case" to describe the
case with the humps only in the middle :-)

PEP 8 recommends TitleCase for class names. The use of camelCase for
instances and method names seems to come from (at least) Java, but PEP
8 prefers lowercase_with_underscores.

-- 
 \     "My theory of evolution is that Darwin was adopted."  -- Steven |
  `\                                                            Wright |
_o__)                                                                  |
Ben Finney



From http  Fri Mar 16 22:17:08 2007
From: http (Paul Rubin)
Date: 16 Mar 2007 18:17:08 -0800
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
Message-ID: <7xird0bom3.fsf@ruckus.brouhaha.com>

tkpmep at hotmail.com writes:
> Or with a generator comprehension
> n  = sum ( y>x[i] for i in range(len(x)) ) - 1
> 
> But there  has to be a cleaner way, as the first approach is unwieldy
> and does not adapt to changing list lengths, and the second is not
> obvious to a casual reader of the code.

How about:

  n = len([y > t for t in x])


From noway at ask.me  Thu Mar 22 19:59:05 2007
From: noway at ask.me (Giovanni Bajo)
Date: Fri, 23 Mar 2007 00:59:05 +0100
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <1174574095.731406.318790@l77g2000hsb.googlegroups.com>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
	<1174529579.990955.116390@l77g2000hsb.googlegroups.com>
	<R1rMh.18272$6.13299@tornado.fastwebnet.it>
	<1174574095.731406.318790@l77g2000hsb.googlegroups.com>
Message-ID: <eLEMh.20201$6.10662@tornado.fastwebnet.it>

On 22/03/2007 15.34, John Pye wrote:

> I downloaded your package and installed it in c:/mingw1. It complained
> that it could not detect Python, although I have Python 2.4 installed
> on my system (did you check HKCU as well as HKLM, perhaps?)

Ewwww you're totally right! I'll have that fixed!

> I note that the gccmrt utility does not work from MSYS. You will need
> to provide a shell-script equivalent version, in order for that to be
> useful for MSYS users. So I opened a cmd prompt and ran the command,
> then restarted my MSYS session. 

Yes, I don't use MSYS. I'll attempt something... any idea how to ship both 
versions and still having the right one picked up depending on which shell 
you're using? Maybe it's just a matter of extensions?

 > There is also a need to be able to
> query the *current state* of the gccmrt option.

Right, I'll add that.

> Next I built my code. It all compiled OK, all the way through to my
> NSIS bundle. So that was nice. It includes gfortran, flex, bison, SWIG/
> Python and Tcl/Tk linkage: a bit of a coup.
> 
> BUT when I try to run my program, I get a windows error msgbox,
> "python.exe - Entry Point Not Found: The procedure entry point _ctype
> could not be located in the dynamic link library msvcr71.dll".

In msvcrt71.dll, there is no _ctype (see declaration at line 111 of 
include\ctype.h). There is only _pctype. What if you comment the declaration 
at line 111? I wonder what it's bringing in _ctype.

Anyway, it looks like mingw-runtime does not support this _ctype change 
between mscvrt.dll and msvcr71.dll. These changes should probably be 
represented in the forms of #ifs checking __MSVCRT_VERSION__. I'm not even 
sure that __MSVCRT_VERSION__ is being set correctly.. that is something gccmrt 
should eventually take care of, but for this specific _ctype problem you 
probably need to submit a patch to mingw-runtime.

I can guide you through it though... I don't have much time in these days though.
-- 
Giovanni Bajo


From claird at lairds.us  Mon Mar 26 00:30:18 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 Mar 2007 04:30:18 +0000
Subject: call to function by text variable
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
	<mailman.5604.1174863631.32031.python-list@python.org>
Message-ID: <qrujd4-s5u.ln1@lairds.us>

In article <mailman.5604.1174863631.32031.python-list at python.org>,
Jan Schilleman <jan.schilleman at xs4all.nl> wrote:
>Hi,
>
>try this:
>func = getattr(operations, ["Replace", "ChangeCase", "Move"][n])
>
>HTH,
>Jan
>
>"ianar?" <ianare at gmail.com> schreef in bericht 
>news:1174862186.134912.117270 at p15g2000hsd.googlegroups.com...
>> yeah the subject doesn't really make sense does it?
>>
>> anyway want I want to do is this:
>> if n == 1:
>>
>>    self.operations.insert(pos, operations.Replace.Panel(self, main))
			.
			.
			.
I think you meant "...[n - 1]" rather than "...[n]".

I'm a tiny bit surprised no one has organized this in terms
of a dictionary.  I don't know, of course, how robust is the
characterization of n as a small integer.  Maybe

  lookup_table = {
      0: "Replace",
      1: "ChangeCase",
      2: "Move"}

captures the sentiment; maybe something else does it better.


From buzzard at urubu.freeserve.co.uk  Wed Mar 14 10:40:41 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Wed, 14 Mar 2007 14:40:41 +0000
Subject: number generator
In-Reply-To: <mailman.5062.1173859145.32031.python-list@python.org>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au><55fbgjF2492skU1@mid.individual.net><1173573654.009953.266280@30g2000cwc.googlegroups.com><7xbqj01u9c.fsf@ruckus.brouhaha.com>	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com><mailman.5007.1173770416.32031.python-list@python.org>	<45f75596.0@entanet>
	<mailman.5062.1173859145.32031.python-list@python.org>
Message-ID: <45f80fea.0@entanet>

Hendrik van Rooyen wrote:
> "Duncan Smith" <bu...ard at urubu.freeserve.co.uk> wrote:
> 
> 
> 
>>Yes, if the generating processes yield numbers from different
>>probability mass functions.  You could simply look at the likelihood
>>ratio.  Otherwise, the likelihood ratio will be 1.
>>
> 
>  I was thinking about the same random number generator being used in the two 
> disparate ways.
> 
> - Hendrik
> 

The code I posted for multinomial variates repeatedly generates
independent Poissons until the total is less than, or equal to, the
desired total.  Then the total is made up by repeatedly sampling from a
discrete distribution (multinomial with n==1).  If you replace the
second stage by just increasing a single count by the necessary amount,
then the two mass functions are clearly different.  I'm not sure that
I'd count this as two approaches using "the same random number generator".

Duncan


From codecraig at gmail.com  Fri Mar  9 15:25:26 2007
From: codecraig at gmail.com (abcd)
Date: 9 Mar 2007 12:25:26 -0800
Subject: How to Start a (thread?) and Leave
In-Reply-To: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
Message-ID: <1173471925.876213.170820@j27g2000cwj.googlegroups.com>

probably a Thread.



From david.bear at asu.edu  Wed Mar  7 13:26:34 2007
From: david.bear at asu.edu (David Bear)
Date: Wed, 07 Mar 2007 11:26:34 -0700
Subject: persistent fifo queue class
References: <3240528.rhEsMVbDK6@teancum> <554m4vF22dgrpU2@mid.uni-berlin.de>
Message-ID: <4011626.Sbva7xkoP2@teancum>

Diez B. Roggisch wrote:

> David Bear schrieb:
>> I'm looking to see if there are any examples or prewritting fifo queue
>> classes. I know this is a broad topic. I'm looking to implement a simple
>> application where a web server enqueue and pickle using a local socket on
>> to a 'queue server' -- and then I will have another application dequeue
>> the pickles again using a local socket.
> 
> Why don't you use a DB for that? If you want pickles, use a  blob
> column. But all the rest - a defined protocol, stable server,
> transactions - you get for free.
> 
> Diez

Thanks for the suggestion. I did think of this. Indeed the final destination
of the data is in a db. However, the postsgresql server is on a separate
box. It will be connected via a private lan. I was worried that possible
network disruptions would cause either the web application to hang -- or
data to just get lost. I was thinking along the lines is a message queue
architecture, where the web app would push data directly onto a queue --
and then a worker app would dequeue the data and handle it by sending it to
the db server or otherwise.


-- 
David Bear
-- let me buy your intellectual property, I want to own your thoughts --


From fredrik at pythonware.com  Fri Mar  2 06:02:52 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 2 Mar 2007 12:02:52 +0100
Subject: Image not displaying in Text widget
References: <5530eb260702281709y10aae111ha6b932aa267d2133@mail.gmail.com>
Message-ID: <es908s$499$1@sea.gmane.org>

Sudipta Chatterjee wrote:

> I am facing a strange problem when I try to embed images in a text widget.
> After reading the file via PhotoImage() and then using
> text.image_create(INSERT,
> image=img), I get a blank place instead of the image. The size of the blank
> area under highlighting via the mouse select comes to exactly the size of
> the image itself, but the contents of the image are not displaying.
>
> I have pack() -ed the text widget already and text around this
> image_create() function are displaying just fine. But the image's contents
> just don't show up! :(

http://effbot.org/pyfaq/why-do-my-tkinter-images-not-appear.htm

</F> 





From arnodel at googlemail.com  Sun Mar  4 12:12:33 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 4 Mar 2007 09:12:33 -0800
Subject: design question: no new attributes
In-Reply-To: <8BIEh.1349$QI4.489@trnddc01>
References: <8BIEh.1349$QI4.489@trnddc01>
Message-ID: <1173028352.988374.188210@v33g2000cwv.googlegroups.com>

On Feb 26, 9:48 pm, "Alan Isaac" <ais... at american.edu> wrote:
> I have a class whose instances should only receive attribute
> assignments for attributes that were created at inititialization.
> If slots are not appropriate, what is the Pythonic design for this?

Hi !

Even though a lot of people have argued against such a thing, I have
been thinking about this last night and I have the following hack.
Classes descending from SuspiciousObject below won't allow new
attributes to be added to their instances apart from within trusted
methods (i.e. methods decorated with @trustedmethod)

Note: this is probably not of great interest but I've decided to share
it since I did this as a result of reading this thread :)

class LockableDict(dict):
    "A dict where addition of new keys can be prevented by setting the
locked attribute"
    __slots__ = ('locked',)
    def __init__(self, locked=False):
        self.locked = locked
    def force_setitem(self, key, value):
        super(LockableDict, self).__setitem__(key, value)
    def __setitem__(self, key, value):
        if self.has_key(key) or not self.locked:
            self.force_setitem(key, value)
        else:
            raise KeyError, key

def trustedmethod(f):
    def pf(self, *args, **kwargs):
        was_locked = self.__dict__.locked
        self.__dict__.locked = False
        try:
            return f(self, *args, **kwargs)
        finally:
            self.__dict__.locked = was_locked
    return pf

class SuspiciousObject(object):
    def __new__(cls, *args, **kwargs):
        self = object.__new__(cls)
        super(SuspiciousObject, self).__setattr__('__dict__',
LockableDict(locked=True))
        return self
    def __setattr__(self, attr, value):
        try:
            self.__dict__[attr] = value
        except KeyError:
            raise AttributeError, "'%s' object has no attribute '%s" %
(type(self).__name__, attr)

# Instances of SuspiciousObject refuse anyone the right to create a
new attribute apart from methods marked with the decorator
@trustedmethod.
# Example:

class Foo(SuspiciousObject):
    @trustedmethod
    def __init__(self):
        self.bar = 2
        self.baz = 'Hello'
    def foobar(self, v):
        self.fubar = v
    @trustedmethod
    def force_setattr(self, attr, val=None):
        setattr(self, attr, val)

This would give something like:

>>> foo=Foo()
>>> foo.bar
2
>>> foo.baz
'Hello'
>>> foo.baz="Bye" # works as foo.baz exists
>>> foo.baz
'Bye'
>>> foo.fubar=4 # won't be trusted
...
AttributeError: 'Foo' object has no attribute 'fubar
>>> setattr(foo, 'fubar', 4) # won't work either
...
AttributeError: 'Foo' object has no attribute 'fubar
>>> foo.__dict__['fubar']=4 # Neither will this
...
KeyError: 'fubar'
>>> foo.foobar(4) # Neither will this as foo.foobar is not a trusted method
...
AttributeError: 'Foo' object has no attribute 'fubar
>>> foo.force_setattr('fubar', 4) # this will work as force_setattr is trusted
>>> foo.fubar
4
>>> # etc...

By creating a custom metaclass for SuspiciousObject, it would be easy
to make SuspiciousObjects trust their own methods by default instead
of having to declare which method are trusted.

--
Arnaud



From __peter__ at web.de  Thu Mar 22 18:27:24 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 Mar 2007 23:27:24 +0100
Subject: fine grain logging cotrol
References: <mailman.5451.1174567188.32031.python-list@python.org>
	<etu19j$nqi$03$1@news.t-online.com>
	<mailman.5464.1174579174.32031.python-list@python.org>
Message-ID: <etuvoj$pqs$03$1@news.t-online.com>

Eric S. Johansson wrote:

> Peter Otten wrote:
>> Eric S. Johansson wrote:
>> 
>>> I need to to be able to conditionally log based on the method the log
>>> statement is in and one other factor like a log level.  in order to do
>>> so, I need to be able to automatically find out the name of the method
>>> and its class but I haven't found out how to do that yet.
>>>
>>> for example,
>>>
>>> class catus(Felis):
>>>    def Siamese_cat( yowl, purr, demand_food):
>>>
>>>      ...
>>>      log("state of litter box %s"% litter_box.smell, level = 1)
>>>
>>>
>>> If the table of methods logged contains "catus.Siamese_cat", then I
>>> would expect to see the output of the log statements in a log file.  If
>>> not then I wouldn't see anything in the log.
>>>
>>> Has somebody done this already?  Is it even possible to do without
>>> manually adding the class and method information for every log
>>> statement?
>>>
>>> a related question is using signals for reloading configurations etc.  I
>>> have to find any good examples of how to use signals to cause a
>>> long-running process to reload external data.  Any good pointers?
>> 
>> Instead of rolling your own, use the logging package which can handle
>> everything but the class info out of the box (levels are spelt as method
>> names info(), warn() etc.).
> 
> I was planning on using logging.  I've been using syslog for too long
>> 
>> import logging
>> 
>> class LoggedType(type):
>>     def __new__(mcl, name, bases, classdict):
>>         classdict["logger"] = logging.getLogger(name)
>>         return type.__new__(mcl, name, bases, classdict)
> 
> __new__ is new to me.  took a look at
> http://www.python.org/download/releases/2.2.3/descrintro/#__new__ which
> give me some clue but not enough.  what I get is that in call
> initialization, you add an entry to the class dict (adds new method??).
> I see that name, bases, or classdict are part of the normal class
> construction process and refer to the class under construction.  I'm
> guessing mcl comes from __metaclass__ and defaults to type?

The first parameter to __new__() is always the actual class (here
LoggedType). Because LoggedType's purpose is to serve as a metaclass I used
the shortcut mcl.

> the getLogger creates a logging channel so there is one channel per
> class?  but what selects the class for output or is that a derived
> logger class I need to create?

As a general direction try to understand the logging package, the __new__()
method (a constructor in C++), and metaclasses (a class is an instance of
another class which is called metaclass to avoid confusion when talking
about both) independently before jumping into the mix.

> also, how could one automatically determine the method doing the logging?
> 
>> 
>> class Felis:
>>     __metaclass__ = LoggedType
> 
> needed in every top level class?

Yes. The good news is that you only need one toplevel class

class Logged:
   __metaclass__ = LoggedType

that you can inherit from.

>>     def alpha(self):
>>         self.logger.info("felis-alpha")
>> 
>> class Catus(Felis):
>>     def alpha(self):
>>         self.logger.info("catus-alpha")
>>     def beta(self):
>>         self.logger.info("catus-beta")
>> 
>> if __name__ == "__main__":
>>     logging.basicConfig(format="%(name)s.%(funcName)s: %(message)s",
>> level=logging.INFO)
>>     f = Felis()
>>     f.alpha()
>>     c = Catus()
>>     c.alpha()
>>     c.beta()
> 
> 
>> 
>> If the metaclass bothers you, here's a simpler alternative:
> 
> simpler to implement but more error prone.  I like the metaclass model.
>   now if one could fill in the class and method name automatically, life
> would be good.

Well, the method name is already there in my example; a class name is there,
too (disguised as the logger name), but it is the name of the actual
instance's class, not the class where the method is defined.
Here is a revised example that logs the defining class:

import logging

class LoggedType(type):
    def __new__(mcl, name, bases, classdict):
        classdict["_%s__logger" % name] = logging.getLogger(name)
        return type.__new__(mcl, name, bases, classdict)

class Logged:
    __metaclass__ = LoggedType

class Felis(Logged):
    def alpha(self):
        self.__logger.info("Felis.alpha")
    def gamma(self):
        self.__logger.info("Felis.gamma")

class Catus(Felis):
    def alpha(self):
        self.__logger.info("Catus.alpha")
    def beta(self):
        self.__logger.info("Catus.beta")

if __name__ == "__main__":
    logging.basicConfig(
        format="EXPECTED %(message)s GOT %(name)s.%(funcName)s",
level=logging.INFO)
    f = Felis()
    f.alpha()
    f.gamma()
    c = Catus()
    c.alpha()
    c.beta()
    c.gamma()

Peter



From EneUran at yahoo.com  Tue Mar 27 13:27:34 2007
From: EneUran at yahoo.com (Ene)
Date: 27 Mar 2007 10:27:34 -0700
Subject: Numeric Soup
In-Reply-To: <46094afe$1@nntp.zianet.com>
References: <46094afe$1@nntp.zianet.com>
Message-ID: <1175016454.685648.218030@y66g2000hsf.googlegroups.com>

On Mar 27, 9:49 am, "Erik Johnson" <nob... at invalid.com> wrote:
>     I am just starting to explore doing some scientific type data analysis
> using Python, and am a little confused by the different incarnations of
> modules (e.g., try Google("Python numeric").
>
>     There is SciPy, NumPy, NumArray, Numeric...  I know some of these are
> related and some are separate, some are oudated, etc. but can someone sort
> of give a general run-down in layman's terms of what's what, what's used for
> what, what depends on what, and what's current?
>
>     At this point my interest is just sort of general, fast array
> manipulation and DSP.
>
> Thanks!

Numeric was slow at large-arrays, so numarray was born.  Well numarray
turned out to be slow at small arrays, so numpy was born. It is trying
to merge Numeric and Numpy together. As it stands Matplotlib does not
support numpy (thus my suggestion to install two of the three - my
choice: numarray + numpy)



From steve at holdenweb.com  Wed Mar 14 08:33:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 08:33:02 -0400
Subject: Quick Filter Dictionary
In-Reply-To: <1173872598.381107.182520@y66g2000hsf.googlegroups.com>
References: <1173871745.698892.189470@n76g2000hsh.googlegroups.com>
	<1173872598.381107.182520@y66g2000hsf.googlegroups.com>
Message-ID: <et8q4k$dl1$1@sea.gmane.org>

abcd wrote:
> On Mar 14, 7:29 am, "abcd" <codecr... at gmail.com> wrote:
>> Hi,
>>    I have a dictionary which may contain various keys/values, however,
>> it will always contain 'name' and 'age' keys.
>>
>>    This dictionary is kept inside a class, such as....
>>
>>     class Person:
>>         def __init__(self, name, age):
>>             self.data = {'name' : name, 'age' : age}
>>
>>         def getData(self, includeNameAge=False):
>>             if includeNameAge: return self.data
>>             tmp = <shallow or deep copy of 'data'>
>>             del tmp['name']
>>             del tmp['age']
>>             return tmp
>>
>>        The getdata method should return the data stored for the
>> person, however, it should be able to return the data excluding the
>> 'name' and 'age'.  Any suggestions on how to best implement this?
>> Keep in mind this sample code is meant to be an example, I realize
>> that a person would probably always want the name and age returned.
>>
>> thanks
> 
> 
> I guess one solution might be....
> 
> def getData(self, includeNameAge=False):
>     if includeNameAge: return self.data
>     return dict(filter(lambda item: item[0] not in ('name', 'age'),
> self.data.items()))
> 
> any other suggestions, improvements?
> 
You might find

     return dict((x,y) for (x, y) in self.data.iteritems()
                 if x not in ('name', 'age'))

easier to understand. Or you might not ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From giles_brown at hotmail.com  Wed Mar  7 08:01:54 2007
From: giles_brown at hotmail.com (Giles Brown)
Date: 7 Mar 2007 05:01:54 -0800
Subject: How to build a Windows service using win32?
In-Reply-To: <mailman.4748.1173263972.32031.python-list@python.org>
References: <mailman.4748.1173263972.32031.python-list@python.org>
Message-ID: <1173272513.976647.99630@n33g2000cwc.googlegroups.com>

On 7 Mar, 10:25, "Gregor Mosheh" <gre... at hostgis.com> wrote:
> I'm trying to write a Win32 service. The following is straight from Python
> Programming on Win32 and it doesn't work. Is that book out of date; is
> there a new way to do services? I searched Google for hours trying to find
> any other method, and have been beating on this one for 5 more hours.
>
> The present error is:
>
> C:\Tester>python tester.py debug
> Debugging service Tester - press Ctrl+C to stop.
> Error 0xC0000004 - Python could not import the service's module
>
> <type 'exceptions.ImportError'>: No module named service
>
> The code is:
>
> import win32serviceutil, win32service, win32event
>
> class Service(win32serviceutil.ServiceFramework):
>     _svc_name_         = "EDMS-to-CG"
>     _svc_display_name_ = "EDMS-to-CG Syncer"
>     _svc_description_  = "Uploaded the EDMS database to Cartograph"
>
>     def __init__(self, args):
>         win32serviceutil.ServiceFramework.__init__(self, args)
>         self.hWaitStop = win32event.CreateEvent(None, 0, 0, None)
>
>     def SvcStop(self):
>         self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
>         win32event.SetEvent(self.hWaitStop)
>
>     def SvcDoRun(self):
>         pausetime = 60 * 1000
>         while True:
>             stopsignal = win32event.WaitForSingleObject(self.hWaitStop,
> pausetime)
>             if stopsignal == win32event.WAIT_OBJECT_0: break
>             self.runOneLoop()
>
>     def runOneLoop(self):
>         import servicemanager
>         servicemanager.LogInfoMsg('Running')
>
> win32serviceutil.HandleCommandLine(Service)

Yeah.  You've cleverly decided to simplify the "smallest possible
python service" by removing the
"""
if __name__ == '__main__':
"""
bit from the script ;)

Try adding it back it.  It worked for me.




From attn.steven.kuo at gmail.com  Tue Mar 20 02:26:25 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 19 Mar 2007 23:26:25 -0700
Subject: using regexp
In-Reply-To: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>
References: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>
Message-ID: <1174371985.817912.157990@y80g2000hsf.googlegroups.com>

On Mar 19, 10:33 pm, s99999999s2... at yahoo.com wrote:
> hi
> how can i use regexp to group these digits into groups of 3?
>
> eg
> line 123456789123456789
>
> i have :
>
> pat = re.compile("line\s+(\d{3})" , re.M|re.DOTALL)
>
> but this only gives the first 3. I also tried
>
> "line\s+(\d{3})+"
> but also not working.
> I need output to be ['123' ,'456','789', '123','456','789', .....]
> thanks.



Try:

import re

target_string = """not 123456789 but
try this line 987654321"""

try:
    digits = re.compile(r'line\s+(\d
+)').search(target_string).group(1)
except AttributeError:
    digits = ''

three_at_a_time = re.compile(r'\d{3}').findall(digits)
print three_at_a_time

--
Hope this helps,
Steven



From mcfletch at vrplumber.com  Thu Mar 22 11:56:25 2007
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Thu, 22 Mar 2007 11:56:25 -0400
Subject: interpreting glyph outlines from ttfquery?
In-Reply-To: <ettp6r$c1l$1@atlantis.news.tpi.pl>
References: <1174545685.277420.26890@e1g2000hsg.googlegroups.com>
	<ettp6r$c1l$1@atlantis.news.tpi.pl>
Message-ID: <4602A729.7030501@vrplumber.com>

Wojciech Mu?a wrote:
> swiftset wrote:
>   
>> I'm try to convert a glyph into a format I can easily numerically
>> manipulate. So far I've figured out how to use ttfquery to get a list
>> that represents the outline of a contour in a glyph:
>>
>> from ttfquery import describe, glyphquery, glyph
>> f = describe.openFont("/usr/share/fonts/truetype/freefont/
>> FreeSans.ttf")
>> n = glyphquery.glyphName(f, 'D')
>> g = glyph.Glyph(n)
>> c = g.calculateContours(f)
>> o = glyph.decomposeOutline(c[1])
>>
>> o looks like:
>>
>> [array([182,  82],'s'),
>> (354, 82),
>> (420.22222222222229, 90.000000000000014),
>> (474.88888888888891, 114.0), ...,
>> array([182,  82],'s'),
>> array([182,  82],'s')]
>>
>> Is this a polyline?
>>     
>
> decomposeOutline docstring confirms -- it's a polyline.  I think 
> elements marked with 's' starts new subpath.
>
> w.
>   
Examples of rendering self.contours and self.outlines (created by 
self.compile on the Glyph) using OpenGL operations are in the toolsfont 
module in OpenGLContext:

http://pyopengl.cvs.sourceforge.net/pyopengl/OpenGLContext/scenegraph/text/toolsfont.py?view=markup

The outlines are simple 2D line-loops, the things with 's' are array 
objects (not start coordinates), you can convert the whole thing to a 
consistent array with numpy.array (or Numeric.array). That is, the 's' 
is just an artefact of how the calculation was done, the values are all 
2-element coordinates, some as Python tuples, some as 2-element 
Numeric/numpy "short" arrays.

HTH,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From stevena at neosynapse.net  Wed Mar 21 18:58:20 2007
From: stevena at neosynapse.net (Steven D. Arnold)
Date: Wed, 21 Mar 2007 18:58:20 -0400
Subject: [JOB] Sr. Python Developer, Northern VA
Message-ID: <1F3D9B42-64FE-42DB-8899-7B071A365F5E@neosynapse.net>

Neosynapse is seeking a senior software developer located in or  
willing to relocate to the Northern VA area to join a project  
building one of the largest grid computing data platforms in the  
world.  Skill and experience required for this engagement include:

* at least 7 years experience in professional software development;
* at least 3 years of Python software development experience;
* proven experience with design, implementation, debugging and  
documentation of large projects;
* past experience with the development of networking client and  
server software;
* experience using SQL databases in the development of software  
applications;
* excellent written and oral communication skills, including the  
ability to clearly explain design choices and discuss alternatives  
with colleagues and managers.

The following skills are desirable but not mandatory:
* experience using SAN file systems;
* experience with general web software development;
* experience writing applications that leverage Oracle databases;
* experience writing and integrating C modules with Python;
* experience with Ruby or Ruby on Rails.

You must be able to function independently as you will work from home  
a significant amount of time on this project.  Limited travel to PA,  
NJ, and CO will be required.  The initial phase of this project will  
last 6 months, with follow-on work planned for approximately 3 years.

If interested and qualified for this position, please submit your  
detailed resume, contact and rate requirements to jobs at neosynapse.net  
with the subject line PY-5.  Principals only.



From mail at microcorp.co.za  Wed Mar  7 00:38:42 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 7 Mar 2007 07:38:42 +0200
Subject: Is every number in a list in a range?
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<pan.2007.03.06.13.44.09.234034@REMOVE.THIS.cybersource.com.au>
Message-ID: <020301c76083$b3701d80$03000080@hendrik>

 "Steven D'Aprano" <st....ybersource.com.au> wrote:

8< --------------- some code with heavy reliance on Booleans and
'is' -----------

All Right.
This has convinced me.
Some Australians do have a sense of humour.

- Hendrik





From CSN.Long at gmail.com  Fri Mar 16 08:08:16 2007
From: CSN.Long at gmail.com (K)
Date: 16 Mar 2007 05:08:16 -0700
Subject: Registration Open for South Florida Software Symposium 2007
In-Reply-To: <1174008720.914436.100180@y66g2000hsf.googlegroups.com>
References: <1174008720.914436.100180@y66g2000hsf.googlegroups.com>
Message-ID: <1174046895.966575.315370@l75g2000hse.googlegroups.com>

It is just a good news.



From faulkner891 at gmail.com  Wed Mar  7 21:54:40 2007
From: faulkner891 at gmail.com (faulkner)
Date: 7 Mar 2007 18:54:40 -0800
Subject: tkinter how to write
In-Reply-To: <esnk48$m4m$1@ss408.t-com.hr>
References: <esnk48$m4m$1@ss408.t-com.hr>
Message-ID: <1173322480.688366.266450@30g2000cwc.googlegroups.com>

On Mar 8, 7:07 pm, Gigs_ <g... at hi.t-com.hr> wrote:
> as I write my first gui program (text editor) I wanna ask you guys how
> to separate code in classes.?
> Should I put in one class my menu and in another class text and
> scorllbars etc?
>
> or something else?
>
> thanks


Use the force. Do whatever feels most right. Remember that you can
always refactor.
A good rule of thumb for GUIs is MVC [a class or set of classes to
encapsulate the abstract relationships known as the Model, another
class or set of classes to handle translating changes to the model
into changes in the GUI aka View, and another class or set of classes
to encapsulate the Controlling of everything], but do not pursue this
to its extreme inanity as Java does. Follow guidelines only so long as
they clarify the code. The second you can no longer keep the overall
structure of the code in your head at once, hit control+z until you
can.

When I wrote my text editor, I wanted to keep everything in one class
because I thought it would be cleaner. Several thousand lines later, I
realized that the notion of a Tab is a significant and powerful
abstraction, as is the UndoStack and the entries in it [UndoEntry].
Right now, I'm thinking about separating all the menuitem callbacks
into their own class because they are different in kind from the
methods which encapsulate the Tabs, menubar, statusbar, etc. into an
application. The reason that I probably won't do this is that a class
is not for grouping methods, it's for representing objects.

UML is another expounded tool for achieving OOP zen before you set
fingertips to keyboard. i've never grokked it, but you should try it
at least once, if only so you can say that you have in a job interview.



From bitbucket at invalid.spam  Fri Mar 30 16:15:20 2007
From: bitbucket at invalid.spam (Schraalhans Keukenmeester)
Date: Fri, 30 Mar 2007 22:15:20 +0200
Subject: Any "consumer review generators" available?
In-Reply-To: <qb6q03t7uq9j33jdvrrg6h90cpr648u56v@4ax.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175225665.929475.183360@n59g2000hsh.googlegroups.com>
	<0sfp03d9epf50d1o9jj22ni1al4o69ut9k@4ax.com>
	<1175263276.576403.10930@l77g2000hsb.googlegroups.com>
	<qb6q03t7uq9j33jdvrrg6h90cpr648u56v@4ax.com>
Message-ID: <460d6fd8$0$333$e4fe514c@news.xs4all.nl>

nullified wrote:
> On 30 Mar 2007 07:01:16 -0700, "Evil Otto" <zburnham at gmail.com> wrote:
> 
>> On Mar 30, 3:46 am, nullified <n... at null.null> wrote:
>>> On 29 Mar 2007 20:34:26 -0700, "Evil Otto" <zburn... at gmail.com> wrote:
>>>
>>>> On Mar 29, 2:19 pm, aral... at aol.com wrote:
>>>>> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan
>>>> I really, really hope that you're looking to generate test data or
>>>> filler text.
>>>> If you're not, then DIAF.
>>> Die In A Fire? Drop In A Fryer? Doug Is A Fucker? Drown In A Fart?
>> Any of those would accurately describe the underlying sentiment, but I
>> had "Die In A Fire" in mind specifically.
> 
> FM!, IWRFT!
Perhaps if he finds his miracle script he can also train it to create
and 'solve' funny acronyms?


From http  Wed Mar 28 14:31:51 2007
From: http (Paul Rubin)
Date: 28 Mar 2007 11:31:51 -0700
Subject: Hpw make lists that are easy to sort.
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>
Message-ID: <7xbqidgqy0.fsf@ruckus.brouhaha.com>

Anton Vredegoor <anton.vredegoor at gmail.com> writes:
> Presorting the second sequence gains us more than three seconds. I
> wonder if there is a way to generate the combined items in such a way
> that sorting them is even faster? Is there some other sorting
> algorithm that can specifically take advantage of this way -or another
> way- of generating this list?

Well there are various hacks one can think of, but is there an actual
application you have in mind?

> The final sequence is len(L)*len(R) long but it is produced from only
> len(L)+len(R) different items, is it possible to exploit this fact?
> I'd also be interested in a more general solution that would work for
> summing the items of more than two lists in this way.

If you really want the sum of several probability distriutions (in
this case it's the sum of several copies of the uniform distribution),
it's the convolution of the distributions being summed.  You can do
that with the fast fourier transform much more efficiently than
grinding out that cartesian product.  But I don't know if that's
anything like what you're trying to do.


From jstroud at mbi.ucla.edu  Mon Mar 26 18:38:32 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 26 Mar 2007 15:38:32 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174926951.133085.294900@l75g2000hse.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
	<1174926951.133085.294900@l75g2000hse.googlegroups.com>
Message-ID: <eu9i18$dm$1@zinnia.noc.ucla.edu>

jp wrote:
> On Mar 26, 11:27 am, kyoso... at gmail.com wrote:
> 
>>On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
>>
>>
>>>On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>>
>>>>I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
>>>>I skip over these widgets when using the tab key?
>>
>>>>Thank you,
>>>>John
>>
>>>I would probably write some custom event handling. Something that
>>>could tell it was a key-press event and not just an on-focus event.
>>>Then it would be a simple, if key-press == tab, put focus on next
> 
> #> > widget of interest. Something like that should work.
> 
>>>Mike
>>
>>I looked in my Tkinter book, and it says that if the widget has the
>>"takefocus" option set to true, the widget is placed in the tab group
>>and will get focus when they are tabbed to. I assume that this means
>>if you set the PMW widgets' "takefocus" option to false, they will be
>>skipped over since they won't be in the tab group.
>>
>>Mike
> 
> 
> I've tried using the takefocus option set to 0 and 1 but either way,
> the tab key still stops at my EntryField.  Below is my snippet of
> code.  What am I doing wrong?
> 
> entry=Pmw.EntryField(frame,
>                      labelpos = 'w',
>                      value = "",
>                      label_text =
> 'Name:')
> entry.grid(row=1)
> #entry.component('entry').takefocus = 1
> entry.component('entry').takefocus = 0
> 

Are you sure you don't mean:

       entry.component('entry')['takefocus'] = 0

which is equivalent to

       entry.component('entry').config(takefocus=0)

James


From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 30 21:26:50 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 31 Mar 2007 11:26:50 +1000
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<pan.2007.03.30.13.23.40.465374@REMOVE.THIS.cybersource.com.au>
	<mailman.5799.1175297553.32031.python-list@python.org>
Message-ID: <pan.2007.03.31.01.26.46.825400@REMOVE.THIS.cybersource.com.au>

On Fri, 30 Mar 2007 18:32:02 -0500, Robert Kern wrote:

>> Some people 
>>     have a strange 
>>         idea of 
>>     "increase 
>> readability".
> 
> Please contain the snark. You didn't understand why someone might want this, and
> that's fine. But please wait until you get a response before assuming that there
> could be no good reason for wanting this.

No, I think the snark was justified. Even the Original Poster admitted in
his reply that when he said "increases readability", he didn't so much
mean making the code easier to read (or as he put it, "decrypt the code")
as mirror the stack depth.

The indentation might even be meaningful, but it hardly increases
readability, and I object strongly (hence the snark) to people labeling
any code convention that carries information or is useful *in any way* as
"increasing readability".

As a general technique, trying to mirror the stack depth with indentation
is doomed to failure for anything but the most trivial code. Try following
that tactic with code that pushes and pops a variable number of items onto
the stack, or mix it with other indented blocks (for, if, etc.).

In my opinion, the O.P. has got the wrong tactic -- one which doesn't
scale, doesn't cope with Python blocks, decreases readability, and is
incompatible with code pretty-printers. He has to manually keep the
indentation adjusted with the stack depth, and if he gets it wrong (which
he will for complex code) the compiler won't tell him.

That's not to say it isn't useful, if his code is small enough. But the
right tactic is, as many people have pointed out, to use context managers
to *ensure* the stack is popped the right number of times, instead of
using indentation as a proxy for stack depth.

There very well might not be a right solution in other languages, I don't
know. For short pieces of code, indents may be no worse than manually
appending the stack depth to each line as a comment, and it might even be
better. But it no more increases readability than it decreases memory
usage or makes the code run faster.



-- 
Steven.



From mystilleef at gmail.com  Sat Mar 17 09:35:36 2007
From: mystilleef at gmail.com (mystilleef)
Date: 17 Mar 2007 06:35:36 -0700
Subject: [Announce] Scribes 0.3.1 Released
Message-ID: <1174138536.260559.208350@b75g2000hsg.googlegroups.com>

Scribes is python editor for *nix and GNOME that balances simplicity
with power. This release features extensibility via Python plugins,
auto-completion enhances, snippets improvement, automatic replacement
and correction, a new minimalist interface, performance optimizations
and more...

release note: http://scribes.sourceforge.net/release-note-0-3-1.html

Flash Demo: http://scribes.sf.net/demo.htm

GIF Demo: http://www.minds.may.ie/~dez/images/blog/scribes.html

download: http://scribes.sf.net/download.html

templates: http://scribes.sf.net/templates.tar.bz2

website: http://scribes.sf.net/



From nvaiser at gmail.com  Wed Mar  7 20:23:23 2007
From: nvaiser at gmail.com (nat)
Date: 7 Mar 2007 17:23:23 -0800
Subject: Error 1 during install of python 2.5 on CentOS
Message-ID: <1173317002.897881.161430@n33g2000cwc.googlegroups.com>

Hi guys,

I'm running CentOS 4.4 and the current version on my system is Python
2.3.4.   Ideally I wanted to use an RPM to update the system python
but a lot of dependencies failed and since I need to run the latest
Python for a particular script, I read on this group somewhere a
suggestion to run both on the same server and use:

"make altinstall"


So I downloaded the 2.5 tarball and ran ./configure and then 'make
altinstall'

Somewhere during the make it gave these errors. It continued after the
first error below but then that "Error 1" error is the last line and
it stopped there.


These are the errors:


Sorry: UnicodeError: ("\\N escapes not supported (can't load
unicodedata module)",)

make: *** [libinstall] Error 1



I can't find any information about this error.  I'm kind of new to
compiling from sources so I don't what to do from here.

/usr/bin has no phython2.5 in it, so I take it the install didn't
complete.


Any ideas what to do from here?


Thanks
Nat



From kinch1967 at gmail.com  Sun Mar 25 02:43:10 2007
From: kinch1967 at gmail.com (bullockbefriending bard)
Date: 24 Mar 2007 23:43:10 -0700
Subject: List comprehension returning subclassed list type?
Message-ID: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>

Given:

class Z(object):
    various defs, etc.

class ZList(list):
    various defs, etc.

i would like to be able to replace

z_list = ZList()
for y in list_of_objects_of_class_Y:
    z_list.append(y)


with something like this:

z_list = [Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y]

Of course this just gives me a plain list and no access to the
methodsof z_list. I could, of course go and write a static method in
ZList which takes a plain list of Z objects and returns a ZList.

Anyway, my question is whether or not this can be done more elegantly
via list comprehension?



From gburdell1 at gmail.com  Fri Mar 23 12:54:45 2007
From: gburdell1 at gmail.com (gburdell1 at gmail.com)
Date: 23 Mar 2007 09:54:45 -0700
Subject: Multi-line strings with formatting
Message-ID: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>

When constructing a particularly long and complicated command to be
sent to the shell, I usually do something like this, to make the
command as easy as possible to follow:

commands.getoutput(
    'mycommand -S %d -T %d ' % (s_switch, t_switch)   +
    '-f1 %s -f2 %s '         % (filename1, filename2) +
    '> %s'                   % (log_filename)
    )

Can anyone suggest a better way to construct the command, especially
without the "+" sign at the end of each line (except the last) ? If I
take out the "+", then I need to move all the variables to the end, as
so:

commands.getoutput(
    'mycommand -S %d -T %d '
    '-f1 %s -f2 %s '
    '> %s'
    % (s_switch, t_switch, filename1, filename2, log_filename)
    )

or:

commands.getoutput(
    '''mycommand -S %d -T %d \
    -f1 %s -f2 %s \
    > %s'''
    % (s_switch, t_switch, filename1, filename2, log_filename)
    )

but having the variables line-by-line as in the first example is so
much easier to edit, is it not?



From __peter__ at web.de  Wed Mar 28 13:27:21 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Mar 2007 19:27:21 +0200
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
Message-ID: <eue8hl$uds$02$1@news.t-online.com>

hg wrote:

> I'v been facing some very strange errors lately:
> 
> one example:
> 
> def __init__(self):
> ....
>         import my_info
>         some_text = my_info.T_SOME_TEXT
>                                       ^ syntax error
> 
> 
> I manage to get rid of that one by moving the import on top of my file.
> 
> Note: Python 2.4.1 under Windows
> 
> 
> Any clue ?

A guess: you may have mixed Unix ("\n") and Windows ("\r\n") newlines. Try
to ensure that every line ends with "\r\n".

Peter



From Emile.Boudreau at cognos.com  Thu Mar 15 15:11:02 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Thu, 15 Mar 2007 15:11:02 -0400
Subject: os.path.isfile with *.tar.gz
Message-ID: <09042D621CD4AA479C678463F3A646D0E87D10@sottemail1.ent.ad.cognos.com>

Hello All,
	I'm new to Python and it looks like people that post here do get
a good answer back so I figured I'd try my luck.

I'm trying to check a directory to see if there is a file that has the
name "startOfString" + some version number + "inst.tar.gz"
(component-8.3.16-inst.tar.gz) The version number will change quite
frequently so I just want to check if there is a file with that format
name.

I have tried variations of: os.path.isfile( os.path.join("C:\\temp\\",
"rqp-win32-app", "*.tar.gz"))
but nothing seem to work. Does anyone have suggestions on how I could
get this to work?

Thanks in advance for the help,
Emile
 
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From nagle at animats.com  Fri Mar 16 15:32:32 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 16 Mar 2007 12:32:32 -0700
Subject: mySQLdb versus platform problem
In-Reply-To: <mailman.5184.1174060768.32031.python-list@python.org>
References: <mailman.5184.1174060768.32031.python-list@python.org>
Message-ID: <BhCKh.15696$bb1.10074@newssvr17.news.prodigy.net>

Try:

     db=MySQLdb.connect(host='appx',db='sc_0',user='user',passwd='secret',
	use_unicode=True, charset = "utf8")

The distinction is that "use_unicode" tells Python to convert to Unicode,
but Python doesn't know the MySQL table type.  'charset="utf8"' tells
MySQL to do the conversion to UTF8, which can be reliably converted
to Unicode.

					John Nagle

Robin Becker wrote:
> I am seeing different outcomes from simple requests against a common 
> database when run from a freebsd machine and a win32 box.
> 
> 
> The test script is
...
> db=MySQLdb.connect(host='appx',db='sc_0',user='user',passwd='secret',use_unicode=True) 


From g.brandl at gmx.net  Sat Mar 31 16:44:56 2007
From: g.brandl at gmx.net (Georg Brandl)
Date: Sat, 31 Mar 2007 22:44:56 +0200
Subject: PyPy for dummies
In-Reply-To: <bt9vd4-1rg.ln1@lairds.us>
References: <460c5515$0$90269$14726298@news.sunsite.dk>	<1175234352.463435.36720@n76g2000hsh.googlegroups.com>
	<bt9vd4-1rg.ln1@lairds.us>
Message-ID: <eumh88$tok$1@sea.gmane.org>

Cameron Laird schrieb:
> In article <1175234352.463435.36720 at n76g2000hsh.googlegroups.com>,
> Paddy <paddy3118 at googlemail.com> wrote:
> 			.
> 			.
> 			.
>>It is also European funding for an open source project with sprints.
>>I'm sure some eurocrat will be dissecting the project to see if it is
>>aa good way to fund technical projects.
>>
>>- Paddy.
>>
> 
> PyPy-ers, what *are* the prospects in this direction?
> Are there write-ups planned that'll be of interest to
> computing people?

There is already a whole bunch of reports for the EU at

http://codespeak.net/pypy/extradoc/eu-report/

HTH,
Georg



From john.pye at gmail.com  Thu Mar  1 04:25:00 2007
From: john.pye at gmail.com (John Pye)
Date: 1 Mar 2007 01:25:00 -0800
Subject: splitting perl-style find/replace regexp using python
Message-ID: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>

Hi all

I have a file with a bunch of perl regular expressions like so:

/(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
bold
/(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
b>''$3/ # italic bold
/(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
italic

These are all find/replace expressions delimited as '/search/replace/
# comment' where 'search' is the regular expression we're searching
for and 'replace' is the replacement expression.

Is there an easy and general way that I can split these perl-style
find-and-replace expressions into something I can use with Python, eg
re.sub('search','replace',str) ?

I though generally it would be good enough to split on '/' but as you
see the <\/b> messes that up. I really don't want to learn perl
here :-)

Cheers
JP



From jgodoy at gmail.com  Sun Mar 18 08:57:12 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 18 Mar 2007 09:57:12 -0300
Subject: encoding - arabic(IBM 864)  to UNICODE
References: <1174221139.794726.224860@o5g2000hsb.googlegroups.com>
Message-ID: <87bqiq1zh3.fsf@gmail.com>

"Madhu Alagu" <almadhu at gmail.com> writes:

> Hello,
>
> How to convert IBM 864,IBM 420 & Nafitha(Arabic)  to UNICODE.

Your OS should have some tools for that.  On Linux I use 'iconv' to convert
from several encodings to several other encodings.

Another option is checking if Python has those encodings available (are they
standard or platform specific?) and using its own conversion method, as
explained in the docs. 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From gregturn at mindspring.com  Mon Mar 12 15:40:24 2007
From: gregturn at mindspring.com (Goldfish)
Date: 12 Mar 2007 12:40:24 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <mailman.4978.1173719342.32031.python-list@python.org>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
Message-ID: <1173728423.775330.164470@t69g2000cwt.googlegroups.com>

You can definitely create a web bot with python. It doesn't require
that you "drive" A real web browser. There are libraries to open web
pages, scrape their contents, and do downloading. That would make your
bot platform neutral. Driving a GUI browser has the risk of being a
brittle script that might not handle different browsers, different
platforms, maybe even not handle different versions.

I run a mediawiki web site, and found a handy python-based library
written to manage it called pywikipediabot at http://sourceforge.net/projects/pywikipediabot/.

Okay, this library won't do your leg work for you, but it has pieces
and parts that demonstrate how to use python to surf a web site. Then,
with an HTML parser, you can hunt down images.

Greg



From aisaac at american.edu  Sat Mar 10 16:40:49 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 10 Mar 2007 21:40:49 GMT
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4825.1173393048.32031.python-list@python.org>
Message-ID: <BBFIh.191$Eg4.49@trnddc03>

> Alan:
>> my actual question remains unanswered...

Bjoern:
> --indent-string or changing a config file doesn't work for you?

Works great.  (I read Robert's message subsequent to that
complaint.)  And pylint is wonderful.

Alan Isaac




From aleax at mac.com  Sun Mar 18 19:52:38 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 16:52:38 -0700
Subject: list comprehension help
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<mailman.5248.1174235057.32031.python-list@python.org>
	<pan.2007.03.18.16.44.22.267421@gmx.net>
	<mailman.5250.1174236797.32031.python-list@python.org>
	<1hv62q7.1r5ow4v1hzcpd7N%aleax@mac.com>
	<1174260927.973118.131360@p15g2000hsd.googlegroups.com>
Message-ID: <1hv6jrl.ndu25h172zdqbN%aleax@mac.com>

George Sakkis <george.sakkis at gmail.com> wrote:
   ...
> > Unless each line is huge, how exactly you split it to get the first and
> > last blank-separated word is not going to matter much.
> >
> > Still, you should at least avoid repeating the splitting twice, that's
> > pretty obviously sheer waste: so, change that loop body to:
> >
> >     words = line.split(' ')
> >     db[words[0]] = words[-1]
> >
> > If some lines are huge, splitting them entirely may be far more work
> > than you need.  In this case, you may do two partial splits instead, one
> > direct and one reverse:
> >
> >     first_word = line.split(' ', 1)[0]
> >     last_word = line.rsplit(' ', 1][-1]
> >     db[first_word] = last_word
> 
> I'd guess the following is in theory faster, though it might not make
> a measurable difference:
> 
>     first_word = line[:line.index(' ')]
>     last_word = line[line.rindex(' ')+1:]
>     db[first_word] = last_word

If the lines are huge, the difference is quite measurable:

brain:~ alex$ python -mtimeit -s"line='ciao '*999" "first=line.split('
',1)[0]; line=line.rstrip(); second=line.rsplit(' ',1)[-1]"
100000 loops, best of 3: 3.95 usec per loop

brain:~ alex$ python -mtimeit -s"line='ciao '*999"
"first=line[:line.index(' ')]; line=line.rstrip();
second=line[line.rindex(' ')+1:]"

1000000 loops, best of 3: 1.62 usec per loop

brain:~ alex$ 

So, if the 4GB file was made up, say, of 859853 such lines, using the
index/rindex approach might save a couple of seconds overall.

The lack of ,1 in the split/rsplit calls (i.e., essentially, the code
originally posted) brings the snippet time to 226 microseconds; here,
the speedup might therefore be of a couple HUNDRED seconds in all.


Alex


From lobais at gmail.com  Fri Mar  2 18:51:38 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 00:51:38 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de> <pan.2007.03.02.23.12.08@gmail.com>
	<1172877633.676612.141450@31g2000cwt.googlegroups.com>
Message-ID: <pan.2007.03.02.23.51.54@gmail.com>

Den Fri, 02 Mar 2007 15:20:33 -0800 skrev MonkeeSage:

> On Mar 2, 5:11 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
>> Wouldn't that be just as slow?
> 
> Well, I'm not sure about speed, but with the lambda you're creating a
> new callable for f every time you call sortMoves. Intuitively, that
> seems like it would be more of a hit than just doing a lookup for a
> predefined function. Mabye not though...you could time it and see.

I guess the thing is that I'd have to create a new callable no matter 
how, as it is the only way to bring the extra variables into the getValue 
function when called by sort.


From skip at pobox.com  Wed Mar 21 11:15:36 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 21 Mar 2007 10:15:36 -0500
Subject: Garbage collection
In-Reply-To: <etrhfo$bv3$1@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
Message-ID: <17921.19480.46133.937296@montanaro.dyndns.org>


    Tom> ...and then I allocate a lot of memory in another process (eg. open
    Tom> a load of files in the GIMP), then the computer swaps the Python
    Tom> process out to disk to free up the necessary space.  Python's
    Tom> memory use is still reported as 953 MB, even though nothing like
    Tom> that amount of space is needed.  From what you said above, the
    Tom> problem is in the underlying C libraries, but is there anything I
    Tom> can do to get that memory back without closing Python?

Not really.  I suspect the unused pages of your Python process are paged
out, but that Python has just what it needs to keep going.  Memory
contention would be a problem if your Python process wanted to keep that
memory active at the same time as you were running GIMP.  I think the
process's resident size is more important here than virtual memory size (as
long as you don't exhaust swap space).

Skip


From gagsl-py2 at yahoo.com.ar  Tue Mar 13 15:13:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 16:13:03 -0300
Subject: Starting an external, independent process from a script
References: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
	<180b672e0703130257w281a182kc722ad2b705c68f2@mail.gmail.com>
Message-ID: <op.to46b1qgx6zn5v@gabriel2.softlabbsas.com.ar>

On 12 Mar 2007 16:13:51 -0700, Henrik Lied <henriklied at gmail.com> wrote:

>> I'm trying to create a video uploading service (just to learn). The
>> system is mostly based on Django, but the question I'm looking an
>> answer for is more related to Python.

En Tue, 13 Mar 2007 06:57:33 -0300, rishi pathak  
<mailmaverick666 at gmail.com> escribi?:

> You can do something like this:
> pid = os.fork()

I don't think it's a good idea, the running process is Django, not a  
script.

To the OP: I think the question *is* a Django question. You could launch  
the external process, finish the current request and redirect to another  
location; in that page you set a refresh to itself, and show the current  
status "somehow" depending on how your external process can report its  
progress. The details on how to do that, or even if that way is a good  
approach at all, depend on Django.

-- 
Gabriel Genellina



From vatamane at gmail.com  Tue Mar  6 02:39:35 2007
From: vatamane at gmail.com (Nick Vatamaniuc)
Date: 5 Mar 2007 23:39:35 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
Message-ID: <1173166774.038781.262760@t69g2000cwt.googlegroups.com>

On Mar 5, 5:16 pm, "Alex Li" <likw... at gmail.com> wrote:
> Hello,
>
> I would like to use Python 2.5 on Windows with Graphviz to generate
> graphs.  I used yapgvb but it only requires Python 2.4 (won't work
> with Python 2.5).  Other packages like pydot seems to be unmaintained
> or requires custom building to be used on Windows (pygraphviz), which
> I tried to avoid.  Any suggestions?
>
> Thanks in advance,
> Alex

Alex,
You can always pipe your dot file directly to the dot or neato
executables using the subprocess method then read the output. This way
you don't have to install yapgvb or other adapters and it will work
with Python 2.5. But you will need to compose your dot file as a giant
character buffer...
-Nick V.



From DustanGroups at gmail.com  Sun Mar 18 08:25:01 2007
From: DustanGroups at gmail.com (Dustan)
Date: 18 Mar 2007 05:25:01 -0700
Subject: Private data
In-Reply-To: <pan.2007.03.18.12.06.32.760433@REMOVE.THIS.cybersource.com.au>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.12.06.32.760433@REMOVE.THIS.cybersource.com.au>
Message-ID: <1174220701.206419.77780@e65g2000hsc.googlegroups.com>

On Mar 18, 7:06 am, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> On Sat, 17 Mar 2007 09:31:01 -0700, Dustan wrote:
> >http://dustangroups.googlepages.com/privateattributesinpython
>
> > This is something that I just threw together this morning, after a
> > eureka moment. It's a way of creating private class attributes and
> > static function variables (I'm not 100% sure if that's the correct
> > terminology, but you get what I mean). I haven't tried to create
> > private instance attributes, mainly because it would just be too
> > difficult, and it would be awful syntax. I'm not considering actually
> > using this, but I do have a couple questions about it.
>
> > 1. Has anyone else ever come up with something like this? I can't
> > imagine I'm the only person who's ever thought of this.
>
> I've never seen anything like this before, but then I haven't gone looking
> for anything like this.
>
> > 2. Is it possible to hack into something like this? ie, would it be
> > possible to see and change these variables from client code (assuming
> > the data manager has been properly removed from sight, as shown on the
> > last line of class block TestPrivateClassAttributes)?
>
> Yes.
>
> First, an example of the code in action.
>
> >>> import PrivateAttributes
> >>> obj = PrivateAttributes.TestPrivateClassAttributes()
> >>> obj.getNumInstances()
> 1
> >>> another = PrivateAttributes.TestPrivateClassAttributes()
> >>> obj.getNumInstances()
> 2
> >>> athird = PrivateAttributes.TestPrivateClassAttributes()
> >>> athird.getNumInstances()
>
> 3
>
> The getNumInstances method reports the number of instances of the
> PrivateAttributes class. There's no obvious class attribute where this
> count is being kept:
>
> >>> obj.__class__.__dict__.keys()
>
> ['__module__', 'getNumInstances', '__dict__', '__weakref__', '__doc__',
> '__init__']
>
> Here's how to hack it, and make it report wrong numbers.
>
> >>> c = obj.getNumInstances.func_closure
> >>> c[1].cell_contents.numInstances = -300
>
> >>> athird.getNumInstances()
> -300
> >>> afourth = PrivateAttributes.TestPrivateClassAttributes()
> >>> athird.getNumInstances()
>
> -299
>
> So yes, it is absolutely hackable.

I did have a feeling that it was hackable, but had no idea how one
could possibly go about hacking it (I was starting to wonder of there
was a way to apply locals() and globals() on functions). But now I
(ehem) sorta know how it's done.

> Now, I'm hardly a Python guru, but in about fifteen minutes I followed the
> trail through the object chain, and found how to hack this. An real guru
> would probably do it in three minutes.
>
> I was helped a bit by having the source code. But even without the source
> code, I reckon I could have done it in an hour or so, if I was motivated
> enough. All the tools you need are a Python interactive session, the dir()
> function and the dis module.

I have used all of those before, but I haven't been able to fully
understand the output of the dis module; maybe that's my problem.

> --
> Steven



From bblais at bryant.edu  Sat Mar 10 10:33:24 2007
From: bblais at bryant.edu (Brian Blais)
Date: Sat, 10 Mar 2007 10:33:24 -0500
Subject: minimum age to learn python (a.k.a graphical vs text languages)
Message-ID: <45F2CFC4.5010801@bryant.edu>

Hello,

I was wondering what the approximate minimum age to learn python is.  Has anyone had 
experience teaching middle school students, or elementary school students Python? 
What brought this up for me is thinking about starting a Lego robots group in a local 
middle school.  I only teach college, and have little experience with middle school 
students, so I find it hard to guess what they could actually do.  I started 
programming when I was about 5th grade, on a Commodore VIC 20 (3.5k RAM!) in basic, 
but I don't think I am typical.  (Of course, now, you can probably infer my age to 
within 2 years!  :)  ).


I've written something so that students can program in Python syntax to run the Lego 
Mindstorms robots.  The most commonly used language for these robotos, in the middle 
school, is Robolab which is entirely graphical.  Although a good program, I find 
there are some drawbacks:
1) Robolab is commercial, and not all schools can afford this above and beyond the 
price of the lego mindstorms
2) Robolab only runs on Mac/Windows, and not Linux, so those schools that have tried 
to save money on the operating system get whacked there too
3) Robolab can *only* do Lego robots.

Although you learn the basic language structures (loops, branching, etc...), because 
it is graphical, Robolab doesn't translate directly.  Perhaps this is enough for kids 
to start, but perhaps one can do better.

On the other hand, my pynqc tool (which uses the freely available nqc language for 
the Lego Mindstorms) is:
1) free (in both senses)
2) runs on Mac/Linux/Windows
3) because you use python syntax, it is easier to go and do other python projects not 
involving robots

In my mind, this opens up more doors, but it is not graphical.

I wanted to hear responses from people who have experience teaching programming in 
elementary/middle (or even high) school.  Do graphical languages make a big 
difference?  Do text-based languages put up barriers to young learners?  Is it no big 
deal either way?


		thanks,

			Brian Blais

-- 
-----------------

              bblais at bryant.edu
              http://web.bryant.edu/~bblais


From bignose+hates-spam at benfinney.id.au  Tue Mar 20 00:02:41 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 20 Mar 2007 15:02:41 +1100
Subject: any ways to judge whether an object is initilized or not in
	a	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
Message-ID: <87aby87eam.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:

> On Mon, 19 Mar 2007 19:48:37 +1100, Ben Finney wrote:
>
> > It's also best to inherit every class from another class, leading
> > to a single hierarchy for all classes and types. 'object' is the
> > one to choose if you don't want the behaviour of any other class.
>
> What's wrong with old-style classes?

    <URL:http://wiki.python.org/moin/NewClassVsClassicClass>

The main ones for me are:

  - super() doesn't work.

  - property() doesn't work as expected.

  - They will disappear in a future version of Python, and the docs
    recommend them for backward compatibility with existing code. This
    is reason enough to avoid writing classic classes in any new code.

    More importantly, it's a reason to educate all new programmers in
    using new-style classes and inheritance.

-- 
 \      "I don't know half of you half as well as I should like, and I |
  `\      like less than half of you half as well as you deserve."  -- |
_o__)                                                    Bilbo Baggins |
Ben Finney



From john106henry at hotmail.com  Fri Mar  2 16:31:30 2007
From: john106henry at hotmail.com (John Henry)
Date: 2 Mar 2007 13:31:30 -0800
Subject: Matplotlib axes label
In-Reply-To: <1172848925.223085.277440@n33g2000cwc.googlegroups.com>
References: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>
	<1172814815.385543.180040@j27g2000cwj.googlegroups.com>
	<1172815638.950663.198040@t69g2000cwt.googlegroups.com>
	<1172847759.727020.281300@p10g2000cwp.googlegroups.com>
	<1172848925.223085.277440@n33g2000cwc.googlegroups.com>
Message-ID: <1172871090.837507.267080@64g2000cwx.googlegroups.com>

On Mar 2, 7:22 am, attn.steven.... at gmail.com wrote:
> On Mar 2, 7:02 am, "John Henry" <john106he... at hotmail.com> wrote:
>
> > On Mar 1, 10:07 pm, "John Henry" <john106he... at hotmail.com> wrote:
>
> > > On Mar 1, 9:53 pm, attn.steven.... at gmail.com wrote:
>
> (snipped)
>
>
>
> > > > You can try adjusting the labels and ticks
> > > > using matplotlib.ticker.
>
> > > > To the example you cited, one can add
>
> > > > from matplotlib.ticker import MultipleLocator, FormatStrFormatter
>
> > > > # ...
>
> > > > minorLocator = MultipleLocator(0.1)
> > > > minorFormattor = FormatStrFormatter('%0.1f')
> > > > ax.yaxis.set_minor_locator(minorLocator)
> > > > ax.yaxis.set_minor_formatter(minorFormattor)
>
> > > > show()
>
> > > Thank you for the response.  Yes, adding those lines did work.
>
> > > But what exactly is going on here?  Why would adding these two lines
> > > works?
>
> > > Thanks,
>
> > Okay, I played with the ticker formater and locator routines.
> > Unfortunately, it doesn't help.  The locator sets the major value and
> > the formatter determines how the axes label is formatted.  It doesn't
> > gurantee that the first label starts at the origin.  Half of my plots
> > works, and half of them doesn't.
>
> As default, matplotlib places labels and tick marks
> at major ticks.  Minor ticks are invisible as
> a default.
>
> The lines that I added turned on *minor*
> ticks and their labels; I set them to appear
> at integer multiples of 0.1 and I
> formatted them as floating point numbers.
>
> There's nothing to prevent you from
> having minor ticks appear at intervals
> that exceed those of major ticks.  E.g.,
>
> minorLocator = MultipleLocator(1.1)
>
> # etc.
>
> --
> Hope this helps,
> Steven


Thanks,



From skip at pobox.com  Sat Mar 10 09:50:28 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 10 Mar 2007 08:50:28 -0600
Subject: Searching comp.lang.python/python-list@python.org (was: UTF-8)
In-Reply-To: <D83B5FFE-4A7A-471A-A26A-F52DFB40E930@gmail.com>
References: <D83B5FFE-4A7A-471A-A26A-F52DFB40E930@gmail.com>
Message-ID: <17906.50612.763425.215861@montanaro.dyndns.org>


    Olivier> About this mailing list: it is very hard to search. I can't
    Olivier> find any search field on the page:
    Olivier> http://mail.python.org/mailman/listinfo/ python-list. I would
    Olivier> greatly appreciate if you moved that list over to google, for
    Olivier> instance, so that it be both searchable and rss-feedable.

To start with, the list isn't going to move.  However, you have all sorts of
search options.

    1. Google - search for
    
          site:mail.python.org python-list utf8

    1a. python-list at python.org is gatewayed with the Usenet newsgroup
        comp.lang.python.  That means you can visit

          http://groups.google.com/

        and search for 

          group:comp.lang.python utf8

    2. GMane - go to

          http://dir.gmane.org/gmane.comp.python.general

       and search for

          utf8

    3. Free Network Group - go to

          http://archives.free.net.ph/splash/index.en.html

       select Python group and/or python-list mailing list and search for

          utf8

As for RSS, try ASPN:

    feed://listserv.activestate.com/rss/python-list-rss1.0.xml

I could keep going, but I'll stop there.

Skip


From inq1ltd at verizon.net  Mon Mar 12 21:33:37 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Mon, 12 Mar 2007 21:33:37 -0400
Subject: attaching Tkinter Listbox to python list object
In-Reply-To: <1173746051.180729.97350@h3g2000cwc.googlegroups.com>
References: <1173746051.180729.97350@h3g2000cwc.googlegroups.com>
Message-ID: <200703122133.37871.inq1ltd@verizon.net>

On Monday 12 March 2007 20:34, Steve Potter wrote:
> I am trying to find some method of attaching a
> Listbox object to a list object so as the
> contents of the list are changed the contents
> of the Listbox will be updated to match.  I
> have found a few references to something like
> this in this old post
> http://groups.google.com/group/comp.lang.python
>/browse_thread/thread/3a6fe7534c812f55/43f201ab5
>3cfdbf7 as well as here
> http://effbot.org/zone/wck-4.htm .
>
> It just seems that there should be some way of
> achieving this.
>
> The only this I can think of is create a
> subclass of list that deletes and then refills
> the Listbox every time that the list changes,
> but this seems very in efficient.
>
>
> Any ideas?
>
> Steve

Look into the StringVar(), 
class for Tkinter. 

var = stringVar()

sorry I can't help more, but I think this is what 
you are looking for.

jim-on-linux

http:\\www.inqvista.com 







From sjmachin at lexicon.net  Sat Mar  3 04:03:08 2007
From: sjmachin at lexicon.net (John Machin)
Date: 3 Mar 2007 01:03:08 -0800
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <1172909337.334188.231650@64g2000cwx.googlegroups.com>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<1172909337.334188.231650@64g2000cwx.googlegroups.com>
Message-ID: <1172912588.784276.201920@n33g2000cwc.googlegroups.com>

On Mar 3, 7:08 pm, attn.steven.... at gmail.com wrote:
> On Mar 2, 2:44 pm, "Shawn Milo" <S... at Milochik.com> wrote:
>
> (snipped)
>
> > I'm attaching both the Perl and Python versions, and I'm open to
> > comments on either. The script reads a file from standard input and
> > finds the best record for each unique ID (piid). The best is defined
> > as follows: The newest expiration date (field 5) for the record with
> > the state (field 1) which matches the desired state (field 6). If
> > there is no record matching the desired state, then just take the
> > newest expiration date.
>
> > Thanks for taking the time to look at these.
>
> My attempts:
>
>
> ### Python (re-working John's code) ###
>
> import sys
>
> def keep_best(best, current):
>
>     ACTUAL_STATE = 1
>     # John had these swapped
>     DESIRED_STATE = 5
>     EXPIRY_DATE = 6

*Bullshit* -- You are confusing me with Bruno; try (re)?reading what
the OP wrote (and which you quoted above):
"""
The newest expiration date (field 5) for the record with
the state (field 1) which matches the desired state (field 6).
"""

and his code (indented a little less boisterously):

"""
#If the current record is the correct state
if current.split("\t")[1] == current.split("\t")[6]:
    #If the existing record is the correct state
    if best.split("\t")[1] == best.split("\t")[6]:
        #If the new record has a newer exp. date
        if current.split("\t")[5] > best.split("\t")[5]:
"""



From sickcodemonkey at gmail.com  Sat Mar  3 17:25:39 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Sat, 3 Mar 2007 17:25:39 -0500
Subject: py2exe: LoadLibrary(pythondll) failed
In-Reply-To: <1172947039.158260.225980@j27g2000cwj.googlegroups.com>
References: <1172947039.158260.225980@j27g2000cwj.googlegroups.com>
Message-ID: <2adc542f0703031425l1010ac71ldd5e71a572cd31be@mail.gmail.com>

(1)  You may want to read the following links:
http://docs.python.org/dist/describing-extensions.html#SECTION002340000000000000000

which came from:
http://docs.python.org/dist/dist.html

Here is another good resource for py2exe:
http://www.py2exe.org/index.cgi/GeneralTipsAndTricks

(2) Also, you maybe interested in PyInstaller which can wrap up everything
in one functioning exe.
http://pyinstaller.python-hosting.com/

"Single file: build a single executable file, totally self-contained, which
runs without any external dependency."

On 3 Mar 2007 10:37:19 -0800, zxo102 <zxo102 at gmail.com> wrote:
>
> Hi there,
>    I py2exe my test.py  as test.exe with a lot of dll and pyc in that
> directory. If I move the test.exe into another directory and run it
> from there, it gives me an error " LoadLibrary(pythondll) failed...
> python24.dll".  How can I set it up correctly for this test.exe to
> run?   Thanks.
>
> Ouyang
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From kyosohma at gmail.com  Fri Mar 30 13:24:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 10:24:45 -0700
Subject: clean up html document created by Word
In-Reply-To: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
Message-ID: <1175275485.638978.196710@l77g2000hsb.googlegroups.com>

On Mar 30, 12:20 pm, "jd" <chima... at gmail.com> wrote:
> I am looking for python code (working or sample code) that can take an
> html document created by Microsoft Word and clean it up (if you've
> never had to look at a Word-generated html document, consider yourself
> lucky ;-)  Alternatively, if you know of a non-python solution, I'd
> like to hear about it.
>
> Thanks...
>
> -- jeff

You could try Beautiful Soup at http://www.crummy.com/software/BeautifulSoup/documentation.html

Python is good for parsing HTML/XML, so you could also try googling
Python parsing as well.

Mike



From pecora at anvil.nrl.navy.mil  Tue Mar 13 09:33:09 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Tue, 13 Mar 2007 09:33:09 -0400
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<55lbl1F25geaaU1@mid.uni-berlin.de>
	<45f58642$0$1408$426a74cc@news.free.fr>
	<1173747820.728559.102360@q40g2000cwq.googlegroups.com>
	<12vc6rfq995undb@corp.supernews.com>
Message-ID: <pecora-AB6E76.09330913032007@ra.nrl.navy.mil>

In article <12vc6rfq995undb at corp.supernews.com>,
 Grant Edwards <grante at visi.com> wrote:

> > I'm a Python developer, I don't give a rats ass about what
> > people say about C#, Python, or c++, they all have their uses.
> > My main reasoning for considering C++ as the backend is some
> > things (reading memory for example) are much easier to do in
> > C++ than in Python, and we already have a lot written in C++.
                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

[cut]

> > Anyways, thanks for everyones feedback, we will most likely go
> > with a combination of Python and C++.
> 
> I think you're nuts to decide that you need C++ before you've
> tested a Python implementation, but it's your nickle. :)

It really sounds like it's the C++ legacy that's driving Mr. Edward's 
decision.  The rest are just arguing points. Which several people have 
jumped at.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From psdasilvaX at esotericaX.ptX  Thu Mar  8 17:23:40 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Thu, 08 Mar 2007 22:23:40 +0000
Subject: Where to "import"?
In-Reply-To: <1173379952.901004@iceman.esoterica.pt>
References: <1173379952.901004@iceman.esoterica.pt>
Message-ID: <45F08CEC.6000806@esotericaX.ptX>

Paulo da Silva escreveu:


This is to thank all the answers I got so far.
Now I understand perfectly how "import" works.

Regards.
Paulo


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar  8 04:36:47 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 10:36:47 +0100
Subject: splitting common functions into a sepperate module
In-Reply-To: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>
References: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>
Message-ID: <45efd90d$0$24707$426a74cc@news.free.fr>

jonkersbart at gmail.com a ?crit :
> Dear,
> 
> I have wrote a script and want to group some functions of the script
> in a separate modulo so that I can import the module in other scripts
> and use the same functions there..
> 
> The problem is that the common functions need access to some global
> variables defined in the script.

And now you find out why globals are bad...

> Python uses different namespaces for
> different modules so I can't access the variables of the script in the
> module.
> 
> What is the best solution to solve this problem?

There's no one-size-fits-all answer. Usual solutions include:
- passing the needed values as args to the functions
- wrapping the functions as methods of a class, passing the whole state 
as args to the class initializer.





From jmcmonagle at velseis.com.au  Mon Mar 26 22:58:49 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Tue, 27 Mar 2007 12:58:49 +1000
Subject: Associate image name with list item
In-Reply-To: <b8eda$4608822b$4275d90a$15798@FUSE.NET>
References: <b8eda$4608822b$4275d90a$15798@FUSE.NET>
Message-ID: <46088869.6010505@velseis.com.au>

Kevin Walzer wrote:
> I'm trying to avoid a *lot* of typing in my Tkinter application by 
> associating image names with items in a list. Here is my sample list:
> 
> self.catlist = [
>              'all', 'installed', 'base', 'crypto', 'database', 'devel',
>          'editors', 'games', 'gnome', 'graphics', 'kde', 'languages', 
> 'libs', 'libs_perlmods',
>          'libs_pythonmods', 'libs_rubymods', 'net', 'sci', 'shells', 
> 'sound', 'text', 'web',
>          'x11_system', 'x11-wm', 'x11'
>              ]
> 
> I've also already created a bunch of images with names that correspond 
> to the list above, i.e. self.all, self.installed, and so on.  Here's the 
> rest of my code:
> 
> for item in self.catlist:
>              print item
>              self.categorytable.insert(END, item)
> 	    self.categorytable.cellconfigure("end,0", image=self.item)
> 
> This yields the following error:
> 
> AttributeError: item
> 
> because, of course, I don't actually have an image called self.item.
> 
> What I'm trying to do is get the value of the variable "item" and plug 
> it into the image name, so that self.item actually corresponds to 
> self.installed, self.base, etc. Trying something like
> 
> self.categorytable.cellconfigure("end,0", image=self.%s % item)
> 
> just yields a syntax error: SyntaxError: invalid syntax
> 
> Can anyone point me in the right direction?



Create a dictionary mapping the name to the image object.  For example:

# Create all your images first

# Map a name to the image object
self.catdict = {'all' : self.all, 'installed' : self.installed, .......}

# Loop over the image names and do your stuff
for item in self.catdict.keys():
   print item
   self.categorytable.insert(END, item)
   self.categorytable.cellconfigure("end,0",image=self.catDict.get(item))

Regards,

John


From timr at probo.com  Tue Mar 13 02:59:27 2007
From: timr at probo.com (Tim Roberts)
Date: Tue, 13 Mar 2007 06:59:27 GMT
Subject: Starting Python... some questions
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
Message-ID: <4oicv2hrlkqn1eph9bu2qpp3nbd01mtisr@4ax.com>

You only need three things here:

jezonthenet at yahoo.com wrote:
>
>#!/usr/bin/python
>import scapy
>import struct
>
>class lldp_class:
>	def __init__(self):
>		self.chassis_id_tlv = None
>
>	def chassis_id(subtype, chassis_info):

Make that
        def chassis_id(self, subtype, chassis_info):

When you call "p.chassis_id", "p" is passed as the first parameter to
chassis_id.  By convention, we call that "self", in the same way the object
of a C++ method is called "this" (although that is enforced, rather than
convention).

>		if subtype == 4:
>			chassis_data = struct.pack("!B",chassis_info)
>		subtype_data = struct.pack("!B",subtype)
>		self.chassis_id_tlv = subtype_data + chassis_data
>
>def __main__():

Make that
  def main():

The underscores have a special meaning that you do not need here.  Note
that the name "main" is not required; some people call it something like
"test".

>	p = lldp_class()
>	p.chassis_id(4, "01:80:C2:00:00:0E")
>	payload = p.chassis_id_tlv
>	ether = scapy.Ether(dst="01:02:03:04:05:06")
>	fullpayload = ether + payload
>	sendp(fullpayload)

Now, at the end, add:

if __name__=="__main__":
    main()

That should do it.
-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.


From tom.rectenwald at eglow.net  Mon Mar 19 11:40:02 2007
From: tom.rectenwald at eglow.net (tereglow)
Date: 19 Mar 2007 08:40:02 -0700
Subject: Using pxssh
Message-ID: <1174318801.995293.246230@d57g2000hsg.googlegroups.com>

Hello,

I am trying to convert some Expect/Tcl code into Python by using the
Pexpect module.  The environment is such that authenticated keys are
disabled although SSH is available.  I do not have control over this
environment, so I'm trying to automate tasks within it via Expect.

I noticed that, within the Pexpect documentation, it mentions a class
called "pxssh".  Has anyone used this before?  If so, I'm having some
trouble importing it.  If I just import pxssh doesn't seem to work;
really am not sure how this is related to Pexpect or how to use it
from within it.

Any help is appreciated.
Tom



From rpdooling at gmail.com  Wed Mar 14 17:03:43 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 14 Mar 2007 14:03:43 -0700
Subject: Python books?
In-Reply-To: <et9n5u$q48$1@panix3.panix.com>
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
	<mailman.4942.1173623618.32031.python-list@python.org>
	<et9n5u$q48$1@panix3.panix.com>
Message-ID: <1173906223.048740.18050@b75g2000hsg.googlegroups.com>

On Mar 14, 3:50 pm, a... at pythoncraft.com (Aahz) wrote:

> Some people prefer shorter books -- Python for Dummies (for new
> programmers) and Python in a Nutshell (for experienced programmers) both
> try to give a thorough survey of Python while keeping the book easy to
> carry.

And other people like lots of examples and code organized around
practical projects a person might like to accomplish using Python. The
Python Cookbook 2nd edition is great for this, and Martelli et al are
great writers, as well as great programmers.

rd




From noway at ask.me  Sun Mar 18 11:22:47 2007
From: noway at ask.me (Giovanni Bajo)
Date: Sun, 18 Mar 2007 16:22:47 +0100
Subject: GCC 4.1.2 installer for Python distutils compilation
In-Reply-To: <1174220692.775873.211740@l75g2000hse.googlegroups.com>
References: <mailman.5240.1174195220.32031.python-announce-list@python.org>
	<1174220692.775873.211740@l75g2000hse.googlegroups.com>
Message-ID: <cPcLh.11089$6.9599@tornado.fastwebnet.it>

On 18/03/2007 13.24, David Rushby wrote:

> Even though I have access to MSVC 7.1, so I don't really need MinGW
> myself, [...]

But remember that GCC 4.1.2 is almost 4 years newer than MSVC 7.1, and I found 
it to produce more optimized code (especially for C++). Since it's a free 
alternative, it might be worth to give it a go :)
-- 
Giovanni Bajo


From mscottschilling at hotmail.com  Fri Mar 30 02:48:05 2007
From: mscottschilling at hotmail.com (Mike Schilling)
Date: Fri, 30 Mar 2007 06:48:05 GMT
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
Message-ID: <Fo2Ph.12350$Um6.9109@newssvr12.news.prodigy.net>

Xah Lee wrote:

> So, a simple code like this in normal languages:
>
> a = "a string";
> b = "another one";
> c = join(a,b);
> print c;
>
> or in lisp style
>
> (set a "a string")
> (set b "another one")
> (set c (join a b))
> (print c)
>
> becomes in Java:
>
> public class test {
>   public static void main(String[] args) {
>     String a = new String("a string");
>     String b = new String("another one");
>     StringBuffer c = new StringBuffer(40);
>     c.append(a); c.append(b);
>     System.out.println(c.toString());
>     }
> }
>

Only when written by someone almost entirely ignorant of Java. 




From davidnicolson1 at hotmail.com  Tue Mar 27 00:52:28 2007
From: davidnicolson1 at hotmail.com (David Nicolson)
Date: Tue, 27 Mar 2007 14:52:28 +1000
Subject: shutil.copy Problem
In-Reply-To: <1174970535.061022.141230@l77g2000hsb.googlegroups.com>
References: <mailman.5648.1174965082.32031.python-list@python.org>
	<1174970535.061022.141230@l77g2000hsb.googlegroups.com>
Message-ID: <BAY105-DAV16498BE4BF3A127F6369E9956E0@phx.gbl>

Thanks, but it's definitely not the print. In original the code the  
print statements are replaced by a call to a log method.

Besides, the exception would be different if it was thrown outside of  
the try block.


On 27/03/2007, at 2:42 PM, Justin Ezequiel wrote:

> On Mar 27, 11:10 am, David Nicolson <davidnicols... at hotmail.com>
> wrote:
>> Hi,
>>
>> I wasn't exactly sure where to send this, I don't know if it is a bug
>> in Python or not. This is rare, but it has occurred a few times and
>> seems to be reproducible for those who experience it.
>>
>> Examine this code:
>>>>> try:
>>>>>     shutil.copy("/file.xml","/Volumes/External/file.xml")
>>>>> except Exception, err:
>>>>>     print sys.exc_info()[0]
>>>>>     print err
>>
>> This is the output:
>> exceptions.UnicodeDecodeError
>> 'ascii' codec can't decode byte 0xd6 in position 26: ordinal not in
>> range(128)]
>>
>> What could the possible cause of this be? Shouldn't shutil simply be
>> reading and writing the bytes and not character decoding them?
>>
>> Cheers,
>> David
>
> what if you try it without the try...except?
> perhaps the UnicodeDecodeError is in the print...
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list





From B.Ogryczak at gmail.com  Fri Mar  9 11:07:50 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 9 Mar 2007 08:07:50 -0800
Subject: opinion needed
In-Reply-To: <1173454035.316124.307620@h3g2000cwc.googlegroups.com>
References: <1173454035.316124.307620@h3g2000cwc.googlegroups.com>
Message-ID: <1173456470.308295.79020@q40g2000cwq.googlegroups.com>

On Mar 9, 4:27 pm, "azrael" <jura.gro... at gmail.com> wrote:
> id like to hear your opinion about something.
> I just started using Prolog yesterday and i have my doubts about it,
> but it seems to me something like object oriented. so i wanted to ask
> you how usefull prolog is.

It's very useful for "Logic Programming" classes. Better pick would be
RDFS or OWL, and a logic engine of choice. There are Python
implementations.





From bbxx789_05ss at yahoo.com  Sat Mar 24 23:42:52 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 20:42:52 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174794013.752495.42220@o5g2000hsb.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5571.1174789089.32031.python-list@python.org>
	<1174794013.752495.42220@o5g2000hsb.googlegroups.com>
Message-ID: <1174794172.156941.107550@y66g2000hsf.googlegroups.com>

On Mar 24, 9:40 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> On Mar 24, 8:18 pm, Michael Bentley <mich... at jedimindworks.com> wrote:
>
> > On Mar 24, 2007, at 12:30 PM, Robert Hicks wrote:
>
> > > I want to upgrade to 2.5 but I don't see any unistall instructions
> > > anywhere.
>
> > Don't uninstall it.
>
> > That's why Apple put python under /Library/Frameworks/
> > Python.framework/Versions.  So you can have multiple versions installed.
>
> /Libary/Frameworks/ is an empty directory(except for . and ..) on my
> Mac, and I have 2.3.5 installed somewhere.

I mean /Library/Frameworks

Misspelled it in the post, but not when I searched it.  I did an ls -
al on it and got this:

$ ls -al /Library/Frameworks
total 0
drwxrwxr-x    2 root  admin    68 Jul  1  2006 .
drwxrwxr-t   43 root  admin  1462 Feb 20 14:31 ..



From n.emami at gmail.com  Thu Mar  1 06:46:03 2007
From: n.emami at gmail.com (Nader)
Date: 1 Mar 2007 03:46:03 -0800
Subject: installing "pysqlite"
In-Reply-To: <1172745997.863121.96940@8g2000cwh.googlegroups.com>
References: <9258d$45e3fa5d$9117fe9b$16503@news2.tudelft.nl>
	<1172576685.560386.306740@m58g2000cwm.googlegroups.com>
	<639dd$45e5625a$9117fe9b$1180@news1.tudelft.nl>
	<1172663495.011225.76410@v33g2000cwv.googlegroups.com>
	<1172741654.589821.255220@v33g2000cwv.googlegroups.com>
	<1172745997.863121.96940@8g2000cwh.googlegroups.com>
Message-ID: <1172749563.834987.197840@z35g2000cwz.googlegroups.com>

On Mar 1, 11:46 am, "Paul Boddie" <p... at boddie.org.uk> wrote:
> On 1 Mar, 10:34, "Nader" <n.em... at gmail.com> wrote:
>
>
>
> > I have expanded the LD_LIBRARY_PATH to my home lib (export
> > LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/people/emami/lib).
> > I have built and installed the 'pysqlite-2.3.3' with the next
> > 'setup.cfg' :
>
> > [build_ext]
> > define=
> > include_dirs=/usr/people/emami/include
> > library_dirs=/usr/people/emami/lib
> > #libraries=/usr/people/emami/lib/libsqlite3.so  (this line as a
> > comment)
>
> This looks alright. Be sure to verify that libsqlite3.so is in /usr/
> people/emami/lib, although I suppose you've done this, looking at your
> comment.
>
> > The resutl of this process was:
>
> > running install_lib
> > copying build/lib.linux-i686-2.4/pysqlite2/_sqlite.so -> /usr/people/
> > emami/lib/python2.4/site-packages/pysqlite2
> > running install_data
>
> > This message had given after installing. I have controll the '/usr/
> > people/emami/lib/python2.4/site-packages/pysqlite2' whether the
> > '_sqlite.so' has copied there. Yes it has. Okay!
>
> So pysqlite2 has installed properly at least.
>
> > I go to python and I give the next command:
>
> > >>> from pysqlite import test
>
> > and Unfortunately I get the next error message:
>
> [...]
>
> > ImportError: /usr/people/emami/lib/python2.4/site-packages/pysqlite2/
> > _sqlite.so: undefined symbol: sqlite3_set_authorizer
>
> I'm running out of ideas here, but you could try doing this:
>
> ldd /usr/people/emami/lib/python2.4/site-packages/pysqlite2/_sqlite.so
>
> This should show a list of references to libraries, but if one of them
> is missing in some way then it means that it isn't found by the linker
> and it's not on the LD_LIBRARY_PATH. Another thought is that
> sqlite3_set_authorizer isn't found in the SQLite library - you can
> test this by doing the following:
>
> nm /usr/people/emami/lib/libsqlite3.so
>
> I get something like this in response:
>
> 00000000000110b0 T sqlite3_set_authorizer
>
> If you don't get anything in response or if you see "U" instead of
> "T", then this might indicate an problem with the way SQLite has been
> configured.
>
> > Do you know what option I have to give to if I want to use the
> > 'easy_install" tool?
> > %easy_install pysqlite (with some optione with which it cab find the
> > installed 'libsqlite.so')
>
> I'm no easy_install expert, I'm afraid. You might want to talk to the
> pysqlite people directly if what I've suggested doesn't help you
> further:
>
> http://www.initd.org/tracker/pysqlite/wiki/pysqlite
>
> Paul

Hello

ldd returens the next result:
ldd /usr/people/emami/lib/python2.4/site-packages/pysqlite2/_sqlite.so
    linux-gate.so.1 =>  (0xffffe000)
    libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40040000)
    libc.so.6 => /lib/tls/libc.so.6 (0x40050000)

and the 'nm' gives this:

nm usr/people/emami/lib/libsqlite3.so | grep  sqlite3_set_authorize
0000ce40 T sqlite3_set_authorizer


        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)




From robin at reportlab.com  Fri Mar  2 09:20:52 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 02 Mar 2007 14:20:52 +0000
Subject: Sorting strings containing special characters (german 'Umlaute')
In-Reply-To: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>
Message-ID: <45E832C4.9060805@chamonix.reportlab.co.uk>

DierkErdmann at mail.com wrote:
> Hi !
> 
> I know that this topic has been discussed in the past, but I could not
> find a working solution for my problem: sorting (lists of) strings
> containing special characters like "?", "?",... (german umlaute).
> Consider the following list:
> l = ["Aber", "Beere", "?rger"]
> 
> For sorting the letter "?" is supposed to be treated like "Ae",
> therefore sorting this list should yield
> l = ["Aber, "?rger", "Beere"]
> 
> I know about the module locale and its method strcoll(string1,
> string2), but currently this does not work correctly for me. Consider
>      >>> locale.strcoll("?rger", "Beere")
>      1
> 
> Therefore "?rger" ist sorted after "Beere", which is not correct IMO.
> Can someone help?
> 
> Btw: I'm using WinXP (german) and
>>>> locale.getdefaultlocale()
> prints
>    ('de_DE', 'cp1252')
> 
> TIA.
> 
>   Dierk
> 
we tried this in a javascript version and it seems to work sorry for long line 
and possible bad translation to Python


#coding: cp1252
def _deSpell(a):
	u = a.decode('cp1252')
	return 
u.replace(u'\u00C4','Ae').replace(u'\u00e4','ae').replace(u'\u00D6','OE').replace(u'\u00f6','oe').replace(u'\u00DC','Ue').replace(u'\u00fc','ue').replace(u'\u00C5','Ao').replace(u'\u00e5','ao')
def deSort(a,b):
	return cmp(_deSpell(a),_deSpell(b))

l = ["Aber", "?rger", "Beere"]
l.sort(deSort)
print l



-- 
Robin Becker



From kf9150 at gmail.com  Sat Mar 24 04:13:23 2007
From: kf9150 at gmail.com (Kelie)
Date: Sat, 24 Mar 2007 08:13:23 +0000 (UTC)
Subject: execution speed increase after compile py code into exe?
Message-ID: <loom.20070324T091014-216@post.gmane.org>

hello,

would there be any speed increase in code execution after python code being
compiled into exe file with py2exe?

thanks,

kelie



From bik.mido at tiscalinet.it  Sat Mar 31 08:26:31 2007
From: bik.mido at tiscalinet.it (Michele Dondi)
Date: Sat, 31 Mar 2007 14:26:31 +0200
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <oqks03h3h5tldjodga4and8ua3hej6a1uq@4ax.com>

On Fri, 30 Mar 2007 09:28:36 +0100, bugbear
<bugbear at trim_papermule.co.uk_trim> wrote:

>Er. How about
>
>public class test {
>   public static void main(String[] args) {
>     String a = "a string";
>     String b = "another one";
>     StringBuffer c = a + b;
>     System.out.println(c);
>     }
>}

Even better: pick one entry of your choice from

http://images.google.com/images?q=%22don%27t+feed+the+troll%22


Michele
-- 
{$_=pack'B8'x25,unpack'A8'x32,$a^=sub{pop^pop}->(map substr
(($a||=join'',map--$|x$_,(unpack'w',unpack'u','G^<R<Y]*YB='
.'KYU;*EVH[.FHF2W+#"\Z*5TI/ER<Z`S(G.DZZ9OX0Z')=~/./g)x2,$_,
256),7,249);s/[^\w,]/ /g;$ \=/^J/?$/:"\r";print,redo}#JAPH,


From fabio.fzero at gmail.com  Thu Mar 15 15:47:32 2007
From: fabio.fzero at gmail.com (Fabio FZero)
Date: 15 Mar 2007 12:47:32 -0700
Subject: Using wildcards with Popen in the Subprocess module
In-Reply-To: <mailman.5141.1173980396.32031.python-list@python.org>
References: <mailman.5141.1173980396.32031.python-list@python.org>
Message-ID: <1173988052.094888.23320@l75g2000hse.googlegroups.com>

You could use glob and expand the resulting list to astring manually,
but you have to make sure the command accepts the "command file1 file2
file3..." format.

FZero

On Mar 15, 4:04 pm, William Hudspeth <bhudsp... at edac.unm.edu> wrote:
> Hello,
>
> I am needing to pass an argument to the Popen function of the Subprocess
> module that includes a wildcard in the filename. It seems that Popen is
> not able to expand wildcards, and treats a filename that includes a
> wildcard as a literal.
>
> EX.
>
> var1="/path_to_files/filnames*.doc"
> result=Popen(["command",var1]).wait()
>
> Can anyone tell me how I can work around this problem?
>
> Thanks, Bill




From hlubenow2 at gmx.net  Sat Mar 31 10:47:54 2007
From: hlubenow2 at gmx.net (hlubenow)
Date: Sat, 31 Mar 2007 16:47:54 +0200
Subject: Mouse click in python
References: <1175291924.284001.6840@d57g2000hsg.googlegroups.com>
Message-ID: <qt82e4-6u5.ln1@athlon.my>

Synt4x wrote:

> I'm creating a webcam user interface (to control google earth through
> my webcam) and I still can't find a good example to how to control the
> mouse to "click and drag" (not just click and release).

Pygame:

http://www.pygame.org/
http://www.pygame.org/docs/ref/mouse.html

provides event-control including mouse-event-control.
Mainly it's intended for games, but it should work for other projects like
yours too. HTH

H.


From seberino at spawar.navy.mil  Tue Mar  6 15:02:00 2007
From: seberino at spawar.navy.mil (seberino at spawar.navy.mil)
Date: 6 Mar 2007 12:02:00 -0800
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
In-Reply-To: <mailman.4703.1173163158.32031.python-list@python.org>
References: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>
	<mailman.4703.1173163158.32031.python-list@python.org>
Message-ID: <1173211320.042518.121890@8g2000cwh.googlegroups.com>

On Mar 5, 10:38 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 06 Mar 2007 03:18:23 -0300, seber... at spawar.navy.mil
> <seber... at spawar.navy.mil> escribi?:
>
> > The following web page puts a report in a *popup window* by clicking
> > the "Generate Report" button....
>
> >http://moneycentral.msn.com/investor/research/printrep.asp?Symbol=BBBY
>
> > How can I grab this pop window page in a python script? (It doesn't
> > seem to have a URL!?!)
>
> Of course it has:http://moneycentral.msn.com/investor/research/sreport.asp?Symbol=BBBY...
> If your browser don't let you know the actual URL... try a better browser
> :)
>
> --
> Gabriel Genellina


Sure I can grab the aforementioned URL's contents but what about the
NEW contents in the NEW popup window that appears AFTER you press some
form buttons?  How grab *that* ?



From oliphant.travis at ieee.org  Wed Mar  7 15:25:35 2007
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Wed, 07 Mar 2007 13:25:35 -0700
Subject: Direct memory access
In-Reply-To: <4c0048df0703062040m15e310f2qe3b91f5499fbc07e@mail.gmail.com>
References: <4c0048df0703062040m15e310f2qe3b91f5499fbc07e@mail.gmail.com>
Message-ID: <esn740$hve$1@sea.gmane.org>

Collin Stocks wrote:
> Does anyone know how to directly handle memory using python?
> I want to be able, for example, to copy the actual contents of a memory 
> address, or set the actual contents of a memory address.

This kind of thing is generally not what Python is used for, so it's not 
really easy to do.

Writing to arbitrary memory areas is an easy way to cause segmentation 
violations which Python and its extensions try to make segmentation 
violations (memory violations) as near impossible as they can.

If you really need to do this then you can use ctypes to do it.

Let N be the number of bytes you want to access, then

import ctypes
g = (ctypes.c_char*N).from_address(addr)

g is now a settable sequence of bytes that you can read and write to 
using strings.

g[0]  # read the first byte
g[1]  # read the second byte

g[0] = '\x24' # set the first byte to hexadecimal 24

etc...

If you don't have permission to write to addr then you will get memory 
violations and your program will crash if you try to read from or write 
to the resulting sequence.

-Travis




From gagsl-py2 at yahoo.com.ar  Wed Mar  7 00:42:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 02:42:23 -0300
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<1172774172.389220.124170@j27g2000cwj.googlegroups.com>
	<1172834556.768612.164050@8g2000cwh.googlegroups.com>
	<mailman.4698.1173146386.32031.python-list@python.org>
	<87abyq5e5q.fsf@julius-net.net>
Message-ID: <op.tos0sxj5x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 17:07:45 -0300, Matthias Julius <jnews at julius-net.net>  
escribi?:

> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:
>
>> Dictionary access is highly optimized in Python. In fact, using a
>> precomputed dictionary is about 12 times faster:
>
> Why using a dictionary and not a list?

Because a dictionary is slower? :)
Using a similar test as previously posted, list access is about 15% faster  
than dictionary access for such small range.

-- 
Gabriel Genellina



From haraldarminmassa at gmail.com  Thu Mar 15 08:48:20 2007
From: haraldarminmassa at gmail.com (GHUM)
Date: 15 Mar 2007 05:48:20 -0700
Subject: cx_Oracle and unicode data
In-Reply-To: <1173960337.453122.168150@o5g2000hsb.googlegroups.com>
References: <1173960337.453122.168150@o5g2000hsb.googlegroups.com>
Message-ID: <1173962900.180835.224200@b75g2000hsg.googlegroups.com>

loo ping,

> But it's not what I call a 'clean' solution and I suppose that it must
> exist another way to force the client DB to use UTF8, or another
> solution to get my data.

I share your feeling. I asked a similiar question ~1 year ago; and:
your solution is the only one.

The oracle-libs get their encoding from the environment. I also
learned that it often is helpfull to first set the environment and
THEN import cx_Oracle (which loads the oci.dll)

> import os
> os.environ["NLS_LANG"] = ".UTF8"
> import cx_Oracle
>

> cur.execute("select DESCRIPTION from DEC_DESCRIPTION where
> DEC_DESCRIPTION_ID = 1792528")

Additionally: UTF8 has different numbers of bytes per character. Your
select will only succeed for the time that DESCRIPTION encoded in UTF8
is shorter or equal to length(DESCRIPTION)

I got into the habbit to cast those fields to
NVARCHAR2(as big as I think it may get)

Harald



From steve at REMOVEME.cybersource.com.au  Tue Mar 13 01:12:11 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 13 Mar 2007 16:12:11 +1100
Subject: Starting Python... some questions
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
Message-ID: <pan.2007.03.13.05.12.10.593926@REMOVEME.cybersource.com.au>

On Mon, 12 Mar 2007 21:39:11 -0700, jezonthenet wrote:

> I started using Python a couple of days ago - here are a few
> questions:
> 
> * Doesn't the __main__() method automatically execute when I run my
> python program?


No. 


> * Only when I do an import of my test.py file within python and then
> run test.__main__() I can see where my bugs are. Is this correct?
> (right now this is my only way of running my python program and see
> where I have problems)

That's a good way of choosing to run __main__ manually, but there are
other ways.

If you add a line to the end of your program:

__main__()


the function will be executed whenever the program runs. That is both when
you import it, and when you run it from the command line.

To ensure it doesn't run when you import, do this:


if __name__ == "__main__":
    __main__()



> * Once I've done an import and then I wish to make a change to the
> file I've imported I have to quit Python, restart and import that
> module again in order for the module to be refreshed. Is there no "re-
> import" ?

Yes there is. Do this:

import my_module
# do things
# edit the file
# don't forget to save changes (that always catches me out)
reload(my_module)


> * Finally, could someone tell me why I'm having problems with the
> small module below?
>   - Python pretends I provide chassis_id() with three parameters, even
> though I clearly only provide it with two - why?
> 
> Thanks!
> 
> #!/usr/bin/python
> import scapy
> import struct
> 
> class lldp_class:
> 	def __init__(self):
> 		self.chassis_id_tlv = None
> 
> 	def chassis_id(subtype, chassis_info):
> 		if subtype == 4:
> 			chassis_data = struct.pack("!B",chassis_info)
> 		subtype_data = struct.pack("!B",subtype)
> 		self.chassis_id_tlv = subtype_data + chassis_data

Class methods always take a first parameter that points to the
class instance. By convention, it should be called "self". So you should
write this as:

    def chassis_id(self, subtype, chassis_info):
        if subtype == 4:
            chassis_data = struct.pack("!B",chassis_info)
            subtype_data = struct.pack("!B",subtype)
            self.chassis_id_tlv = subtype_data + chassis_data


When you call the method:

my_instance = lldp_class()
my_instance.chassis_id(4, "01:80:C2:00:00:0E")

Python automatically fills in a reference to the instance and calls this:

lldp_class.chassis_id(my_instance, 4, "01:80:C2:00:00:0E")


Just remember to always put "self" as the first argument to a class
method, and you will (almost never) go wrong!



-- 
Steven D'Aprano 



From deets at nospam.web.de  Wed Mar 21 11:52:26 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 Mar 2007 16:52:26 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <56d2lrF28q269U1@mid.uni-berlin.de>

dmitrey wrote:

> Hi all,
> I looked to the PEPs & didn't find a proposition to remove brackets &
> commas for to make Python func call syntax caml- or tcl- like: instead
> of
> result = myfun(param1, myfun2(param5, param8), param3)
> just make possible using
> result =  myfun param1 (myfun2 param5 param8) param3
> 
> it would reduce length of code lines and make them more readable, + no
> needs to write annoing charecters.

This is not true, there is no shorter code lines:

foo bar baz
foo(bar,baz)

And the "more readable" part certainly depends on the habits of the user -
to me, it's harder to read.

Apart from that, even if both statements were true, I doubt there is even
the slightest chance of including it - after all, you'd have to keep around
the "old" way of doing things anyway, and thus you'd end up with two styles
of coding - certainly _not_ something anybody in the python developer
community is interested in.

Diez


From paddy3118 at googlemail.com  Wed Mar 21 03:23:44 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 21 Mar 2007 00:23:44 -0700
Subject: When is List Comprehension inappropriate?
In-Reply-To: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
Message-ID: <1174461824.150667.295820@y66g2000hsf.googlegroups.com>

On Mar 19, 2:41 pm, "Ben" <bensher... at gmail.com> wrote:
> I have recently learned how list comprehension works and am finding it
> extremely cool.  I am worried, however, that I may be stuffing it into
> places that it does not belong.
>
> What's the most "pythony" way to do this:
>
> even = []
> for x in range(0,width,2):
>     for y in range(0,height,2):
>         color = im.getpixel((x,y))
>         even.append(((x,y), color))
>
> versus list comprehension:
>
> even2 = [((x,y), im.getpixel((x,y))) for x in range(0,width,2) for y
> in range(0,height,2)]
>
> Is there a computational difference in creating a blank list and
> appending to it versus doing a list comprehension?   Are there
> advantages to it outside of short and pretty code?
>
> Feel free to tell me a different way to do this, as well.
>
> Thanks,
> Ben

I have found that I have gone too far when I used listcomps for their
sideeffects rather than wanting the list produced, for example the
second listcomp below is an expression as statement I don't want the
list produced - just the effect on data.

>>> # some random ranges
>>> data = [range(random.randrange(3,7)) for x in range(4)]
>>> # but I want each range jumbled
>>> [ random.shuffle(d) for d in data]
[None, None, None, None]
>>> data
[[2, 0, 3, 1], [0, 2, 1], [3, 4, 1, 0, 2], [2, 1, 0, 3]]
>>>

(I do know how to re-write it).

- Paddy.



From inq1ltd at verizon.net  Tue Mar  6 20:49:42 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Tue, 06 Mar 2007 20:49:42 -0500
Subject: askstring Window to the top under Windows
In-Reply-To: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
Message-ID: <200703062049.42488.inq1ltd@verizon.net>

On Tuesday 06 March 2007 08:13, iwl wrote:
> Hi,
>
> I tryed askstring to input some text in my
> script, but some ugly empty Window appears with
> the Input-Window behind and all together behind
> my Console showing my script. So all have to
> brought to the top first by the user - very
> unconfortable


By default
tk will open a root window.
so you will have to create 
something to put into the 
root window.
I suggest a button to open the tkSimpleDialog
box.

go to;
 
http://www.pythonware.com/library/tkinter/introduction/

jim-on-linux
http://www.inqvista.com


From hg at nospam.org  Fri Mar  9 16:16:43 2007
From: hg at nospam.org (hg)
Date: Fri, 09 Mar 2007 22:16:43 +0100
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
	<slrnev2q3q.cis.mandus@oro.simula.no> <d2fIh.4$iC.1@newsfe22.lga>
	<mailman.4872.1173474874.32031.python-list@python.org>
Message-ID: <2iqIh.2485$_R.1335@newsfe23.lga>

Gabriel Genellina wrote:

> En Fri, 09 Mar 2007 05:28:54 -0300, hg <hg at nospam.org> escribi?:
> 
>> Mandus wrote:
>>> 8 Mar 2007 22:04:48 -0800 skrev bressert at gmail.com:
>>>> I'm considering about generating some Python Bindings for C++
>>>> libraries. What are considered the best tools for doing something like
>>>> this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.
>>>
>>> We are doing this quite extensively at work, and have found that in the
>>> long run SWIG is the best solution. OMMV, but if you ask me, the answer
>>> is SWIG.
>>
>> Why do you think it is better than ctypes ?
> 
> I won't say SWIG is better than anything, but how would you use ctypes to
> create an instance of a class with several levels of inheritance, and then
> invoke a virtual method?
> You have to mangle all the names (not too bad, can be done in Python
> following the rules) but you also need to find the right function pointer
> in the virtual method table; and that can't be done without processing the
> source code (at least the .h) in order to know the layout and ordering of
> the methods.
> Let alone inline functions, templates and #define macros.
> 
> --
> Gabriel Genellina


I'm not very familiar with the technology as I just have had to modify an
extension here and there.

I guess my question is off topic as a C++ dll / shared lib is not my main
target but rather C: I need to integrate a printer driver and and would
like if possible to avoid all of the .h stuff involved with SWIG (I am not
being sarcastic): if I can setup my prototypes directly in python, why go
through an extra layer ?

Aren't ctypes better suited to such an application ?

hg



From aisaac at american.edu  Fri Mar  9 20:22:11 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 10 Mar 2007 01:22:11 GMT
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05>
	<55avniF23jpl2U1@mid.individual.net><mailman.4813.1173388535.32031.python-list@python.org><G1mIh.25$qe5.19@trnddc05>
	<mailman.4877.1173484222.32031.python-list@python.org>
Message-ID: <7LnIh.327$mh7.197@trnddc04>

On Fri, 9 Mar 2007, skip at pobox.com apparently wrote:

> Finally, note this from PEP 666:

>   The problem is that there is no polite way to say

>   'Stop wasting your valuable time and mine.'

> That's as politely as I can put it.



I really think you should reread the PEP, which is making

the opposite of your point.

Cheers,

Alan




From aleax at mac.com  Sun Mar 11 21:17:48 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 18:17:48 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<mailman.4949.1173642590.32031.python-list@python.org>
Message-ID: <1hutpfs.1w9hgwlps8a6oN%aleax@mac.com>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:

> En Sun, 11 Mar 2007 15:26:01 -0300, Alex Martelli <aleax at mac.com> escribi?:
> 
> > Or maybe we should give up ever storing -0.0 in the tables
> > of constant and ALWAYS have "0.0, unary-minus" wherever it appears (that
> > would presumably require working on the AST-to-bytecode visitors that
> > currently work ever-so-slightly-differently for this specific
> > troublespot in the C-coded version vs the Python-coded one...).
> 
> I think that way is the less intrusive, doesn't rely on a particular FP
> implementation, and the more likely to be accepted.
> Looking at ast.c, the culprit is some optimization in ast_for_factor, line
> 1506
>      /* If the unary - operator is applied to a constant, don't generate
>         a UNARY_NEGATIVE opcode.  Just store the approriate value as a
>         constant.  The peephole optimizer already does something like
>         this but it doesn't handle the case where the constant is
>         (sys.maxint - 1).  In that case, we want a PyIntObject, not a
>         PyLongObject.
>      */
> 
> After the long "if", I would use parsenumber(STR(pnum)) and check the type
> and value of the resulting object; if it's a float and 0.0, skip the
> optimization and continue below as a normal case.
> Unfortunately I'm not able to compile and test the code right now, so I
> can't provide an actual patch. (At least, not until tuesday). But I hope
> this simple comment is useful anyway...

Yep, it sure might, if I can make time to act on it:-).


> (I cannot find peephole.c on the source distribution for Python 2.5, but
> you menctioned it on a previous message, and the comment above refers to
> the peephole optimizer... where is it?)

http://svn.python.org/view/python/trunk/Python/peephole.c?rev=54086&view
=auto

to browse the current version on the trunk.  Right under the Python
toplevel subdirectory in the sources, IOW.


Alex


From kmdaily at gmail.com  Tue Mar 27 19:31:38 2007
From: kmdaily at gmail.com (kmdaily at gmail.com)
Date: 27 Mar 2007 16:31:38 -0700
Subject: reusing generators
Message-ID: <1175038298.730531.283470@p15g2000hsd.googlegroups.com>

Hello, I have a two large files that I need to read in records from
and compare in a pairwise fashion: Memory is an issue, so I want to
use a generator to get each record one at a time. However, doing the
comparisons with nested for loops, the inner generator will run out of
items. How can I restart the generator from the beginning of the file
each time through the outer loop? Thanks!



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 17 01:17:07 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 17 Mar 2007 16:17:07 +1100
Subject: Returning other instance from __init__
References: <1173933158.948806@jubilee.claranet.pt>
Message-ID: <pan.2007.03.17.05.17.06.334102@REMOVE.THIS.cybersource.com.au>

On Thu, 15 Mar 2007 04:33:01 +0000, Paulo da Silva wrote:

> I would like to implement something like this:
> 
> class C1:
> 	def __init__(self,xxx):
> 		if ... :
> 			self.foo = foo
> 			self.bar = bar
> 		else:
> 			self=C1.load(xxx)
> 
> 	def load(xxx):
> 		...
> 		return instance_of_C1
> 	load=staticmethod(load)
> 
> This does not seem correct. How can I do it?



Others have come up with other solutions which may or may not work, but
perhaps you can adapt this to do what you want.


class CachedClass(object):
    """Class that recycles cached instances.
    """
    _cache = {}
    def __new__(cls, ID):
        print "Calling constructor __new__ ..."
        if cls._cache.has_key(ID):
            print "Returning cached instance..."
            return cls._cache[ID]
        else:
            print "Creating new instance..."
            obj = super(CachedClass, cls).__new__(cls, ID)
            cls._cache[ID] = obj
            return obj
    def __init__(self, ID):
        print "Calling constructor __init__ ..."
        self.ID = ID



-- 
Steven



From deets at nospam.web.de  Wed Mar 21 11:17:40 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 21 Mar 2007 16:17:40 +0100
Subject: replace illegal xml characters
References: <1174464899.057656.177410@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.09.39.56.10295@gmx.net>
	<1174482222.951043.27070@y80g2000hsf.googlegroups.com>
Message-ID: <56d0kkF288qd1U1@mid.uni-berlin.de>

killkolor wrote:

>> Does InDesign export broken XML documents?  What exactly is your problem?
> 
> yes, unfortunately it does. it uses all possible unicode characters,
> though not all are alowed in valid xml (see link in the first post).
> in any way for my application i should be checking if the xml that
> comes in is valid and replace all non-valid characters. is there
> something out there to do this?

I doubt it. Dealing with broken XML is nothing standard-modules should cope
with. The link you provided has all you need - why not just use it?


Diez


From paul at boddie.org.uk  Sat Mar 31 20:34:56 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 31 Mar 2007 17:34:56 -0700
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
In-Reply-To: <yfsirchf04z.fsf@oc.ex.ac.uk>
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
	<yfsirchf04z.fsf@oc.ex.ac.uk>
Message-ID: <1175387696.206324.300290@o5g2000hsb.googlegroups.com>

Alexander Schmolck wrote:
>
> Regardless of its merrits, it's GPL'ed which I assume is an immediate turn-off
> for many in the community.

In the way that tools such as gcc are GPL-licensed, or do you have
something else in mind?

Paul



From gregpinero at gmail.com  Thu Mar  1 01:52:56 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 28 Feb 2007 22:52:56 -0800
Subject: How to Read Bytes from a file
Message-ID: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>

It seems like this would be easy but I'm drawing a blank.

What I want to do is be able to open any file in binary mode, and read
in one byte (8 bits) at a time and then count the number of 1 bits in
that byte.

I got as far as this but it is giving me strings and I'm not sure how
to accurately get to the byte/bit level.

f1=file('somefile','rb')
while 1:
    abyte=f1.read(1)

Thanks in advance for any help.

-Greg



From bbxx789_05ss at yahoo.com  Wed Mar 21 01:49:27 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 20 Mar 2007 22:49:27 -0700
Subject: dictionary.copy()?
Message-ID: <1174456167.319603.88020@l75g2000hse.googlegroups.com>

Here is some example code:

d = {"a":"hello", "b":[1, 2, 3]}

x = d.copy()
d["b"][0]=10
print x

output:
{'a': 'hello', 'b': [10, 2, 3]}

It looks like the key names of a dictionary store pointers to the
values?  Or does a dictionary object manage pointers to keys and
values, so copy() above just copies 4 pointers?



From n00m at narod.ru  Fri Mar 16 01:57:13 2007
From: n00m at narod.ru (n00m)
Date: 15 Mar 2007 22:57:13 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174024143.049965.25710@l77g2000hsb.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
Message-ID: <1174024633.431427.236920@y66g2000hsf.googlegroups.com>

Paul,

import time
t = time.clock()
f = open("D:/m4000.txt","rt")
npairs = int(f.readline())
quads = [map(int, f.readline().split()) for i in xrange(npairs)]
f.close()
da = {}
for p in quads:
    for q in quads:
        z = p[2] + q[3]
        da[z] = da.get(z,0) + 1
print sum(da.get(-(p[0]+q[1]), 0) for p in quads for q in quads)
print time.clock() - t


Two first outputs is of above (your) code; next two - of my code:

>>> ================================ RESTART ===
>>>
0
68.9562762865
>>> ================================ RESTART ===
>>>
0
68.0813539151
>>> ================================ RESTART ===
>>>
0
62.5012896891
>>> ================================ RESTART ===
>>>
0
62.5030784639



From chris.lasher at gmail.com  Tue Mar 27 21:13:22 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 27 Mar 2007 18:13:22 -0700
Subject: Python automatic testing: mocking an imported module?
In-Reply-To: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
References: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
Message-ID: <1175044402.266098.185010@y80g2000hsf.googlegroups.com>

On Mar 27, 6:18 pm, "Silfheed" <silfh... at gmail.com> wrote:
> Heyas
>
> So we have the following situation: we have a testee.py that we want
> to automatically test out and verifiy that it is worthy of being
> deployed.  We want our tester.py to test the code for testee.py
> without changing the code for testee.py.  testee.py has a module in it
> that we want to mock in some tests and in others use the real module.

I think you mean "testee.py *imports* a module", rather than "has a
module in it". Semantics but I was thrown off by this at first.

Why not write tests for the module that testee.py imports (here called
"foo.py")? If you write out the tests and foo.py passes to spec, then
you should feel confident it will work correctly with testee.py. Never
trust it; always play paranoid coder, but feel comfortable enough
using it.

After all, why should you feel comfortable using modules in the
standard library? Nobody guarantees bugs don't still lurk in there
(heck, c.l.p just found one in pdb today), however, they have unit
tests out the wazzoo that demonstrate, to the best of our knowledge,
the module works to spec. If that approach is good enough for the
standard library, wouldn't it be good enough for you?

Chris



From haraldarminmassa at gmail.com  Fri Mar  2 08:35:59 2007
From: haraldarminmassa at gmail.com (GHUM)
Date: 2 Mar 2007 05:35:59 -0800
Subject: Questions about app design - OOP with python classes
In-Reply-To: <pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
Message-ID: <1172842559.727921.268610@30g2000cwc.googlegroups.com>


>
> if hmmCurrentHeight <= hinCriticalHeight:
> then you should instantly recognise that there's a problem.

all civilized nations but one use metric systems. Of course there is a
problem if you spot inches somewhere.

Harald





From supercooper at gmail.com  Tue Mar 27 15:21:55 2007
From: supercooper at gmail.com (supercooper)
Date: 27 Mar 2007 12:21:55 -0700
Subject: urllib timeout issues
Message-ID: <1175023315.536080.276550@n76g2000hsh.googlegroups.com>

I am downloading images using the script below. Sometimes it will go
for 10 mins, sometimes 2 hours before timing out with the following
error:

Traceback (most recent call last):
  File "ftp_20070326_Downloads_cooperc_FetchLibreMapProjectDRGs.py",
line 108, i
n ?
    urllib.urlretrieve(fullurl, localfile)
  File "C:\Python24\lib\urllib.py", line 89, in urlretrieve
    return _urlopener.retrieve(url, filename, reporthook, data)
  File "C:\Python24\lib\urllib.py", line 222, in retrieve
    fp = self.open(url, data)
  File "C:\Python24\lib\urllib.py", line 190, in open
    return getattr(self, name)(url)
  File "C:\Python24\lib\urllib.py", line 322, in open_http
    return self.http_error(url, fp, errcode, errmsg, headers)
  File "C:\Python24\lib\urllib.py", line 335, in http_error
    result = method(url, fp, errcode, errmsg, headers)
  File "C:\Python24\lib\urllib.py", line 593, in http_error_302
    data)
  File "C:\Python24\lib\urllib.py", line 608, in redirect_internal
    return self.open(newurl)
  File "C:\Python24\lib\urllib.py", line 190, in open
    return getattr(self, name)(url)
  File "C:\Python24\lib\urllib.py", line 313, in open_http
    h.endheaders()
  File "C:\Python24\lib\httplib.py", line 798, in endheaders
    self._send_output()
  File "C:\Python24\lib\httplib.py", line 679, in _send_output
    self.send(msg)
  File "C:\Python24\lib\httplib.py", line 646, in send
    self.connect()
  File "C:\Python24\lib\httplib.py", line 630, in connect
    raise socket.error, msg
IOError: [Errno socket error] (10060, 'Operation timed out')


I have searched this forum extensively and tried to avoid timing out,
but to no avail. Anyone have any ideas as to why I keep getting a
timeout? I thought setting the socket timeout did it, but it didnt.

Thanks.

<--- CODE --->

images = [['34095e3','Clayton'],
['35096d2','Clearview'],
['34095d1','Clebit'],
['34095c3','Cloudy'],
['34096e2','Coalgate'],
['34096e1','Coalgate SE'],
['35095g7','Concharty Mountain'],
['34096d6','Connerville'],
['34096d5','Connerville NE'],
['34096c5','Connerville SE'],
['35094f8','Cookson'],
['35095e6','Council Hill'],
['34095f5','Counts'],
['35095h6','Coweta'],
['35097h2','Coyle'],
['35096c4','Cromwell'],
['35095a6','Crowder'],
['35096h7','Cushing']]

exts = ['tif', 'tfw']
envir = 'DEV'
# URL of our image(s) to grab
url = 'http://www.archive.org/download/'
logRoot = '//fayfiler/seecoapps/Geology/GEOREFRENCED IMAGES/TOPO/
Oklahoma UTMz14meters NAD27/'
logFile = os.path.join(logRoot, 'FetchLibreDRGs_' + strftime('%m_%d_%Y_
%H_%M_%S', localtime()) + '_' + envir + '.log')

# Local dir to store files in
fetchdir = logRoot
# Entire process start time
start = time.clock()

msg = envir + ' - ' + "Script: " + os.path.join(sys.path[0],
sys.argv[0]) + ' - Start time: ' + strftime('%m/%d/%Y %I:%M:%S %p',
localtime()) + \
 
'\n--------------------------------------------------------------------------------------------------------------
\n\n'
AddPrintMessage(msg)
StartFinishMessage('Start')

# Loop thru image list, grab each tif and tfw
for image in images:
    # Try and set socket timeout default to none
    # Create a new socket connection for every time through list loop
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect(('archive.org', 80))
    s.settimeout(None)

    s2 = time.clock()
    msg = '\nProcessing ' + image[0] + ' --> ' + image[1]
    AddPrintMessage(msg)
    print msg
    for ext in exts:
        fullurl = url + 'usgs_drg_ok_' + image[0][:5] + '_' + image[0]
[5:] + '/o' + image[0] + '.' + ext
        localfile = fetchdir + image[0] + '_' +
string.replace(image[1], ' ', '_') + '.' + ext
        urllib.urlretrieve(fullurl, localfile)
    e2 = time.clock()
    msg = '\nDone processing ' + image[0] + ' --> ' + image[1] +
'\nProcess took ' + Timer(s2, e2)
    AddPrintMessage(msg)
    print msg
    # Close socket connection, only to reopen with next run thru loop
    s.close()

end = time.clock()
StartFinishMessage('Finish')
msg = '\n\nDone! Process completed in ' + Timer(start, end)
AddPrintMessage(msg)



From theodoremouse at hotmail.com  Fri Mar 16 22:49:43 2007
From: theodoremouse at hotmail.com (Nick Burns)
Date: Sat, 17 Mar 2007 02:49:43 +0000
Subject: import error
Message-ID: <BAY24-F8C0E318059EB1D9167F18A4700@phx.gbl>

An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070317/6ccba468/attachment.html>

From MonkeeSage at gmail.com  Fri Mar  2 19:17:47 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 16:17:47 -0800
Subject: class declaration shortcut
In-Reply-To: <1172879283.545209.100480@j27g2000cwj.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172878142.169464.161690@31g2000cwt.googlegroups.com>
	<1172879283.545209.100480@j27g2000cwj.googlegroups.com>
Message-ID: <1172881067.574580.139230@p10g2000cwp.googlegroups.com>

On Mar 2, 5:48 pm, "Luis M. Gonz?lez" <luis... at gmail.com> wrote:
> Thanks for your detailed reply!
> So after all, the www.rubyclr.com code is not a fair comparison.
> Because the c# code shows a class definition, and the ruby code shows
> a struct definition, which is not equivalent to a class.
> Is that right?

Well c sharp has a struct type, but it's basically just a class, so in
that sense the comparison is accurate. But I don't think the ruby code
is supposed to be a one to one comparison (you could write a similar
Struct class in c sharp too). I assume that what the author there was
trying to say was that ruby is a higher-level language / has more
syntactic sugar than c sharp many times. The same can be said of
python as well, though python is a bit more reserved about adding
sugar (ruby is more aligned with perl in TMTOWTDI, python is more like
"There should be one -- and preferably only one -- obvious way to do
it").

Regards,
Jordan



From ianmurrays at gmail.com  Fri Mar 30 17:58:44 2007
From: ianmurrays at gmail.com (Synt4x)
Date: 30 Mar 2007 14:58:44 -0700
Subject: Mouse click in python
Message-ID: <1175291924.284001.6840@d57g2000hsg.googlegroups.com>

I'm creating a webcam user interface (to control google earth through
my webcam) and I still can't find a good example to how to control the
mouse to "click and drag" (not just click and release). I want to move
an object in front of the webcam and move maps on google earth.

I hope someone understands what i need.



From bj_666 at gmx.net  Thu Mar 15 05:15:22 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 15 Mar 2007 10:15:22 +0100
Subject: what are Python equivalent to MATLAB persistent or C++ static?
References: <1173942572.130747.228410@l77g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.15.09.15.21.389810@gmx.net>

In <1173942572.130747.228410 at l77g2000hsb.googlegroups.com>, dmitrey wrote:

> Thank you in advance,

For what?  Hint: Don't "hide" the question in the subject line.

I don't know MATLAB's `persistent` but I know that ``static`` in C++ can
be used in different places with different meanings.

It seems you are asking questions how to translate some constructs from
other languages 1:1 into Python.  Without context this may lead you to
programming some other language in Python, resulting in fighting the
language because you don't use "pythonic" idioms to solve your problems.

C++-static function's names on module level should start with an
underscore:

def _i_am_not_meant_to_be_public():
    pass

It's a naming convention for things that are considered internal.

C++-static class members are class attributes in Python:

class Spam(object):
    i_am_a_class_attribute = 42

    def __init__(self):
        self.i_am_an_instance_attribute = 'Viking'

And C++static local variables don't exist in Python.  There are ways to
emulate them with mutable default arguments, but that's at least
debatable.  Use a class instead.

Ciao,
	Marc 'BlackJack' Rintsch



From carsten at uniqsys.com  Tue Mar 20 10:18:01 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 20 Mar 2007 10:18:01 -0400
Subject: help - Module needs access to another module
In-Reply-To: <1174398386.976864.109350@p15g2000hsd.googlegroups.com>
References: <1174398386.976864.109350@p15g2000hsd.googlegroups.com>
Message-ID: <1174400281.3445.5.camel@dot.uniqsys.com>

On Tue, 2007-03-20 at 06:46 -0700, abcd wrote:
> I have the following directory/file structure...
> 
> c:\foo\utils.py
> c:\foo\bar\ok.py
> 
> In ok.py I want to do something like...
> 
> import utils
> utils.helpMeDoSomething(....)
> 
> However, it seems that ok.py doesn't "know" about utils.  Other than
> manually configuring sys.path what can I do?

Why would you want to do something other than changing sys.path? Except
for physically moving utils to somewhere that's already on the path,
changing the path is cleanest way to handle this situation.

-Carsten




From nagle at animats.com  Sun Mar 11 12:57:37 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 11 Mar 2007 08:57:37 -0800
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <mailman.4941.1173621676.32031.python-list@python.org>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com><1173595945.530722.273030@30g2000cwc.googlegroups.com><000a01c763c0$6863a560$2102fea9@Guides.local><op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar><008f01c763de$9a1a4190$0702a8c0@Guides.local>	<op.to01f4bvx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<mailman.4941.1173621676.32031.python-list@python.org>
Message-ID: <dyWIh.14374$bb1.10643@newssvr17.news.prodigy.net>

Mike Schinkel wrote:
> Gabriel Genellina wrote:

>>That's why all people always say
>>"never mix tabs and spaces"

     That's the one rule in this area Python ought to enforce.
If you've got that, you can convert tabs to spaces, or vice
versa, safely.

				John Nagle


From grahn+nntp at snipabacken.dyndns.org  Fri Mar 23 10:43:21 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 23 Mar 2007 14:43:21 GMT
Subject: Create new processes over telnet in XP
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
Message-ID: <slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>

On 23 Mar 2007 03:47:14 -0700, Godzilla <godzillaismad at gmail.com> wrote:
> Hello,
>
> How do you create/spawn new processes in XP over telnet using python?
> I.e. I would like to create a new process and have it running in the
> background...

Ssh -- or even rsh -- are better choices than telnet for these things.
For some reason, they are not standard in Windows, though.

  ssh somewhere some command with arguments
  rsh somewhere some command with arguments

compared to

  telnet somewhere

and then performing expect-like things (basically simulating
someone typing "some command with arguments" in the telnet
session).

> when I terminate the telnet connection, I would what the
> spawned processes to keep running until I shut it off...

That's a function of the remote OS; what happens when its terminal
goes away is not under the control of the client side.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From KDawg44 at gmail.com  Fri Mar 23 15:51:52 2007
From: KDawg44 at gmail.com (KDawg44)
Date: 23 Mar 2007 12:51:52 -0700
Subject: Using Python to start SNMP service on remote XP hosts...
Message-ID: <1174679512.935147.231630@n59g2000hsh.googlegroups.com>

Hi,

I am very new to Python and really just began studying and using it.
I read that it was relatively easy to interact with Windows machines
with Python and I am desperately looking for something to replace
VBScript (not a big fan).

I am currently deploying a Gentoo Linux SNMP server running Cacti in
my network and would like my XP machines to report traps to this box.
The SNMP service is not running by default on the machines in the
network and instead of going to each one at a time, I thought I could
write a script.

Does anyone have any suggestions about how I go about accomplishing
this?

Thanks so much for any suggestions.



From gigs at hi.t-com.hr  Fri Mar  2 07:41:12 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 02 Mar 2007 13:41:12 +0100
Subject: Tkinter menus
In-Reply-To: <op.tojzoomirqur0o@eb.pragmadev>
References: <es76c6$5bo$1@ss408.t-com.hr> <es7gvd$m3$1@zinnia.noc.ucla.edu>
	<op.tojzoomirqur0o@eb.pragmadev>
Message-ID: <es961f$82g$1@ss408.t-com.hr>

>> master is a reference to a Tk() or Toplevel(). Frames do not contain 
>> menus, but the windows that contain them do.
> 
> This is the main reason why I always rant about examples of Tkinter 
> programming creating windows by sub-classing Frame: frames are not 
> windows. If you want to create a window, sub-class Toplevel (or Tk), not 
> Frame. A frame is a general-purpose container. It can be sub-classed to 
> create new "mega-widgets" that can be used in any context. This is 
> obviously not the case in the code above, as the parent passed to any 
> instance of MenuDemo *must* be a Toplevel or Tk. So just write:
> 
> class MenuDemo(Toplevel):
>   def __init__(self):
>     Toplevel.__init__(self)
>     ...
>   def makeMenuBar(self):
>     self.menubar = Menu(self)
>     self.config(menu=self.menubar)
>     ...
> 
> and your life will be easier ;-)
> 
> HTH
> --python -c "print ''.join([chr(154 - ord(c)) for c in 
> 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

btw im tkinter newbie so this question could be stupid

is it alright to use Menu instead Toplevel or Tk
like this?

from Tkinter import *
from tkMessageBox import *

class MenuDemo(Menu):
     def __init__(self, master=None):
         Menu.__init__(self, master)
         self.createWidgets()
         self.master.title('Toolbars and Mennus')
         self.master.iconname('tkpython')

     def createWidgets(self):
         self.makeMenuBar()
         self.makeToolBar()
         L = Label(self.master, text='Menu and Toolbar demo')
         L.config(relief=SUNKEN, width=40, height=10, bg='white')
         L.pack(expand=YES, fill=BOTH)




From mjackson at alumni.caltech.edu  Fri Mar 30 09:40:55 2007
From: mjackson at alumni.caltech.edu (Mark Jackson)
Date: Fri, 30 Mar 2007 13:40:55 +0000 (UTC)
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <euj417$lem$1@naig.caltech.edu>

"DE" <devrim.erdem at gmail.com> writes:
> Hello,
> 
> Here is what I do in C++ and can not right now in python :
> 
> pushMatrix()
> {
>      drawStuff();
> 
>      pushMatrix();
>      {
>             drawSomeOtherStuff()
>      }
>      popMatrix();
> }
> popMatrix();
> 
> The curly brackets have no functional meaning but increase the
> readability significantly.

You are e. e. cummings, and I claim my ?5.

-- 
Mark Jackson - http://www.alumni.caltech.edu/~mjackson
	Every 10 years we say to ourselves, "If only we had
	done the right thing 10 years ago."
				- Thomas Friedman




From namesagame-usenet at yahoo.com  Mon Mar 19 14:16:09 2007
From: namesagame-usenet at yahoo.com (gamename)
Date: 19 Mar 2007 11:16:09 -0700
Subject: Renaming or Overloading In Python
In-Reply-To: <1hv6kan.10g80dm1pnrh3dN%aleax@mac.com>
References: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>
	<1hv6kan.10g80dm1pnrh3dN%aleax@mac.com>
Message-ID: <1174328169.266630.183450@n76g2000hsh.googlegroups.com>

On Mar 18, 4:57 pm, a... at mac.com (Alex Martelli) wrote:
> gamename <namesagame-use... at yahoo.com> wrote:
> > Hi,
>
> > I'm a recent convert from TCL.  One of the more powerful aspects of
> > TCL is the ability to rename a function at will (generally for testing
> > purposes).
>
> > Example from the tcl doc:
>
> > rename ::source ::theRealSource
> > set sourceCount 0
> > proc ::source args {
> >     global sourceCount
> >     puts "called source for the [incr sourceCount]'th time"
> >     uplevel 1 ::theRealSource $args
> > }
>
> > So, is such a thing possible in Python?
>
> Assuming that source is a function previously defined in this scope, the
> exactly equivalent Python snippet should be:
>
> theRealSource = source
> sourceCount = 0
> def source(*args):
>   global sourceCount
>   sourceCount += 1
>   print "called source for the %s'th time" % sourceCount
>   return theRealSource(*args)
>
> Others have already offered you other alternatives, but I thought you
> might also be interested in a more direct/immediate translation.
>
> Alex

Excellent! Thanks guys, that really gives me a place to start.

-T



From collinstocks at gmail.com  Wed Mar  7 17:04:39 2007
From: collinstocks at gmail.com (Collin Stocks)
Date: Wed, 7 Mar 2007 17:04:39 -0500
Subject: Direct memory access
In-Reply-To: <esn740$hve$1@sea.gmane.org>
References: <4c0048df0703062040m15e310f2qe3b91f5499fbc07e@mail.gmail.com>
	<esn740$hve$1@sea.gmane.org>
Message-ID: <4c0048df0703071404t39a14768p96f57b5e334e97a7@mail.gmail.com>

Thanks. I didn't know about ctypes.
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From malaclypse2 at gmail.com  Thu Mar  1 15:30:24 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 1 Mar 2007 15:30:24 -0500
Subject: python equivalent of bash find
In-Reply-To: <1172780082.961223.222500@s48g2000cws.googlegroups.com>
References: <1172780082.961223.222500@s48g2000cws.googlegroups.com>
Message-ID: <16651e80703011230l259e563ak6ab06001fd4c5e89@mail.gmail.com>

On 1 Mar 2007 12:14:43 -0800, BartlebyScrivener <rpdooling at gmail.com> wrote:
> I recently moved from XP to Linux, but would like to use Python
> whenever possible.
>
> line from bash script:
>
> find ~/Mail -xdev -type f \( -mtime 0 -or -mtime 1 \) -exec cp -aPvu
> "{}" /backup-dest \;
>
> What modules would I use to accomplish this in Python? Or any other
> Python tricks to copy or backup all files modified today?

You can probably replicate that using the modules os and shutil.
Specifically, os.walk to traverse your directory tree, os.stat to get
the modification time, and shutil.copy to copy files around.  You
might also look at the stat module, which appears to have some helpers
for dealing with os.stat results.

On the other hand, you could also just use os.system or the subprocess
module to wrap your call to the find utility.

-- 
Jerry


From rrs at researchut.com  Fri Mar 16 18:10:10 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Sat, 17 Mar 2007 03:40:10 +0530
Subject: lock problem
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
	<mailman.5170.1174032315.32031.python-list@python.org>
	<1174034766.213528.164170@e65g2000hsc.googlegroups.com>
Message-ID: <27hrc4-nf8.ln1@www.researchut.com>

Leo Kislov wrote:

> But you miss the fact that there is only one environment per process.
> 

Oh!! I think I get your point.

There'd be only one __kabc_ldap environment variable to which all the threads
would be overwriting.

Hmmm!! Yes, you're correct. Thanks for pointing it out.

Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"



From r.grimm at science-computing.de  Sat Mar 17 11:56:57 2007
From: r.grimm at science-computing.de (Rainer Grimm)
Date: Sat, 17 Mar 2007 16:56:57 +0100
Subject: a better solution for GUI in python
In-Reply-To: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <eth34a$324$1@news.BelWue.DE>

ce wrote:
> Hi,
> 
> My company is using python currently for our website. We need to
> develop a GUI front-end for our ERP that would be portable (Windows
> and Linux).
> 
> My question is which solution would be better for the GUI (and easier
> to implement)? I knew there are something like wxidgets, QT and pyGTK?
> actually we will need some complicated stuff in the GUI and yet I
> don't know much about GUI programming.
> 
> Any recommendation guys?
> 
Hallo.

Hava a look at http://www.awaretek.com/toolkits.html .

Regards,
Rainer


From antoine at vo.lu  Sun Mar  4 16:14:43 2007
From: antoine at vo.lu (Antoine De Groote)
Date: Sun, 04 Mar 2007 22:14:43 +0100
Subject: looking for Java final/Ruby freeze functionality in Python
In-Reply-To: <1173038594.837631.322630@c51g2000cwc.googlegroups.com>
References: <45eb1fdf$1@news.vo.lu>
	<1173038594.837631.322630@c51g2000cwc.googlegroups.com>
Message-ID: <45eb3662@news.vo.lu>

yes thanks, that is quite what I was looking for.

Arnaud Delobelle wrote:
> On Mar 4, 7:38 pm, Antoine De Groote <anto... at vo.lu> wrote:
>> Hello,
>>
>> I've been googling for quite a while now but can't find anything about a
>> function/keyword to make a list (or something else) immutable. Could
>> anybody point me to docs about this matter or give me a reason why this
>> (apparently) doesn't exist in Python?
> 
> First result from google 'python freeze object':
> 
> http://www.python.org/dev/peps/pep-0351/
> 
> The PEP was rejected but the document contains a link to a discussion
> about why there is no such thing in python:
> 
> http://mail.python.org/pipermail/python-dev/2006-February/060793.html
> 
> HTH
> 
> --
> Arnaud
> 


From ptmcg at austin.rr.com  Sun Mar 11 12:12:20 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 11 Mar 2007 09:12:20 -0700
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <mailman.4940.1173620244.32031.python-list@python.org>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<000a01c763c0$6863a560$2102fea9@Guides.local>
	<op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<008f01c763de$9a1a4190$0702a8c0@Guides.local>
	<mailman.4940.1173620244.32031.python-list@python.org>
Message-ID: <1173629540.341906.319060@h3g2000cwc.googlegroups.com>

On Mar 11, 8:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>  
> If you mix tabs+spaces, Python simple replaces each tab by 8 spaces.
>

Are you sure about this?  This is not the tab problem I am familiar
with in the past.  In the following sample, the columnar text labeled
'col2' should all be aligned at column 9:

x<tab>col2
xxx<tab>col2
  <tab>col2

In the first line, the tab is replaced with 7 spaces, the second line
by 5, and the third line by 6.  So tab replacement is a bit more
involved than simply "s/\t/        /g".

As I recall, the number of spaces to replace a tab by is something
like 8-(col % 8) where col is the column location of the tab with the
left most column being 0.

-- Paul



From openopt at ukr.net  Thu Mar 15 14:49:17 2007
From: openopt at ukr.net (dmitrey)
Date: 15 Mar 2007 11:49:17 -0700
Subject: right-format of integer output as text
Message-ID: <1173984557.162319.120370@d57g2000hsg.googlegroups.com>

hi all,
I need printing the following:

     1
     2
     3
...
     9
   10
...
   99
 100
...
  999
1000
1001
...
how can I implement this one in the simpliest way?
Thank you in advance,
D.



From LISTSERV at LISTSERV.DARTMOUTH.EDU  Wed Mar 21 08:48:16 2007
From: LISTSERV at LISTSERV.DARTMOUTH.EDU (Dartmouth College LISTSERV Server (15.0))
Date: Wed, 21 Mar 2007 08:48:16 -0400
Subject: Message ("Your message dated Wed, 21 Mar 2007 13:15:54...")
Message-ID: <LISTSERV%200703210848168340.50D4@LISTSERV.DARTMOUTH.EDU>

Your message  dated Wed, 21 Mar  2007 13:15:54 +0100 with  subject "Returned
mail: see transcript for details" has been submitted to the moderator of the
CLASS-84 list: Martha Hartfiel '83 <hartfielmar at HOTMAIL.COM>.


From s.steffann at computel.nl  Wed Mar 21 18:11:46 2007
From: s.steffann at computel.nl (Sander Steffann)
Date: Wed, 21 Mar 2007 23:11:46 +0100
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <1174506107.863399.7970@l75g2000hse.googlegroups.com>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<1174506107.863399.7970@l75g2000hse.googlegroups.com>
Message-ID: <22DFEE21-AC25-463D-A100-3081A6F32EB5@computel.nl>

Hi,

Op 21-mrt-2007, om 20:41 heeft starGaming at gmail.com het volgende  
geschreven:

> On Mar 21, 11:07 am, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
>> In article <etpcon$1g8... at ulysses.news.tiscali.de>, Stargaming wrote:
>>> from sys import version_info
>>> if version_info[0] < 2 or version_info[1] < 4:
>>>      raise RuntimeError("You need at least python2.4 to run this  
>>> script")
>>
>> That'll fail when the major version number is increased (i.e.  
>> Python 3.0).
>>
>> You want:
>>
>>   if sys.hexversion < 0x020400f0:
>>     ... error ...
>
> Yes, it was intended to be and 'and' instead of an 'or'.

If you make it an 'and' it will not raise the exception on version  
like 1.5 or 2.3... If you realy want to use version_info, you'll have  
to do something like:

if version_info[0] < 2 or (version_info[0] == 2 and version_info[1] <  
4):
    raise RuntimeError

- Sander



From superflit at gmail.com  Wed Mar 21 09:36:16 2007
From: superflit at gmail.com (flit)
Date: 21 Mar 2007 06:36:16 -0700
Subject: Technical Answer - Protecting code in python
Message-ID: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>

Hello All,

I have a hard question, every time I look for this answer its get out
from the technical domain and goes on in the moral/social domain.
First, I live in third world with bad gov., bad education, bad police
and a lot of taxes and bills to pay, and yes I live in a democratic
"state" (corrupt, but democratic).
So please, don't try to convince me about the social / economical /
open source / give to all / be open / all people are honest until
prove contrary / dance with the rabbits...
Remember I need to pay bills and security.
Now the technical question:

1 - There is a way to make some program in python and protects it? I
am not talking about ultra hard-core protection, just a simple one
that will stop 90% script kiddies.

2 - If I put the code in web like a web service, how can I protect my
code from being ripped? There is a way to avoid someone using my site
and ripping the .py files?

Thanks and sorry for the introduction



From timm.gloger at gmail.com  Thu Mar  1 10:46:26 2007
From: timm.gloger at gmail.com (Timm Florian Gloger)
Date: Thu, 1 Mar 2007 16:46:26 +0100
Subject: Python Tutorial
In-Reply-To: <16651e80703010556w1e110c77l7c4a4f4e8a9b9aa9@mail.gmail.com>
References: <19269e540703010533u329b2ac2sa82e5e219d7c98f5@mail.gmail.com>
	<16651e80703010556w1e110c77l7c4a4f4e8a9b9aa9@mail.gmail.com>
Message-ID: <19269e540703010746i649fdea0rbadce9ce6ffdef86@mail.gmail.com>

Thanks.
And excuse this now so obviously foolish question. It seems that my
so-called "brain" was not able to recognise "Downloads" as a valueable
possibility to dive into when searching some non-HTML content.
Sorry for wasting your time, and thanks even more for answering nevertheless.

Regards,
Timm (ashamed)

On 3/1/07, Jerry Hill <malaclypse2 at gmail.com> wrote:
> On 3/1/07, Timm Florian Gloger <timm.gloger at gmail.com> wrote:
> > is Guido van Rossum's "Python Tutorial" in non-HTML formats (e.g. PDF
> > or PS) avaiable for free?
>
> Yes.  Download one of the PDF documentation zips from here:
> http://docs.python.org/download and extract the tut.pdf file.  AFAIK
> it's not available as a seperate download.
>
> --
> Jerry
>


From bbxx789_05ss at yahoo.com  Tue Mar 20 20:44:09 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 20 Mar 2007 17:44:09 -0700
Subject: Imports
In-Reply-To: <1174437234.349310.304400@l77g2000hsb.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>
	<1174437234.349310.304400@l77g2000hsb.googlegroups.com>
Message-ID: <1174437849.387794.221130@y66g2000hsf.googlegroups.com>

On Mar 20, 6:33 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> On Mar 20, 12:51 pm, kyoso... at gmail.com wrote:
>
> > I typically just import sys and then do a
> > sys.path.append(directoryPath). This basically makes whatever modules
> > in that path available at run time. If you need a beginners reference
> > book, I recommend "Beginning Python" by Hetland. "Python Programming
> > for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
> > get into the internals of the language like Hetland does. Once you're
> > a snake charmer too, you can "graduate" to the "Programming Python"
> > book by Lutz.
>
> > Mike
>
> I can't access any modules using the sys.path.append() method.  Here
> is my directory structure:
>
> /
> ----Users
> ---------Me
> ------------2testing
> ------------------dir1
> ---------------------test1.py
> ---------------------programs_python
> -----------------------------testA.py
>
> testA.py:
> ------------------------
> def show(x):
>         print x
>
> if __name__ == "__main__":
>         show("hello")
> ------------------------
>
> test1.py:
> ------------------------
> import sys
>
> sys.path.append("/Users/Me/2testing/dir1/programs_python")
> testA.show("hello")
> ------------------------
>
> command:
> ~/2testing/dir1$ python test1.py
>
> output:
> Traceback (most recent call last):
>   File "test1.py", line 4, in ?
>     testA.show("hello")
> NameError: name 'testA' is not defined
>
> Any idea how to do that?

Hmmm...I got it to work like this:

test1.py:
---------
import sys
sys.path.append("/Users/Me/2testing/dir1/programs_python")

import testA
testA.show("hello")



From eric.brunel at pragmadev.com  Tue Mar 27 08:14:26 2007
From: eric.brunel at pragmadev.com (Eric Brunel)
Date: Tue, 27 Mar 2007 14:14:26 +0200
Subject: tkinter MVC
References: <euav6p$eii$1@ss408.t-com.hr>
Message-ID: <op.tpukacbayvwwzh@ericb.pragmadev>

On Tue, 27 Mar 2007 13:29:25 +0200, Gigs_ <gigs at hi.t-com.hr> wrote:

> Can someone give me example how to write text editor in tkintter with  
> model-view-controler?
> What goes to controler and what goes to model?
>
> thanks in advance

Others may have a different opinion, but I think using MVC to do a text  
editor is a bit overkill. Basically, the only operation needed on the  
model are reading and writing of the file, so a basic Python file object  
will be OK. Considering that, and since the Tkinter Text widget is  
basically already a full-featured text editor, the controller part is also  
quite limited. You could do it however, but it would just be a matter of  
moving the methods called by the bindings to a secondary class. If what  
you're doing is just a text editor, it may not be worth the effort.

Having an MVC architecture for a text editor may be a good idea if the  
file objects have to interact with other objects at a "functional" level,  
i.e without any impact on the GUI. If what you're doing is only a text  
editor, i.e only managing text files, the advantages of such an  
architecture won't really show up...

My [$???]0.02...
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From tjreedy at udel.edu  Wed Mar 28 22:35:29 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 28 Mar 2007 22:35:29 -0400
Subject: Hpw make lists that are easy to sort.
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl><7xbqidgqy0.fsf@ruckus.brouhaha.com>	<euenlj$oll$1@news4.zwoll1.ov.home.nl><mailman.5732.1175121444.32031.python-list@python.org>
	<eueu79$mkd$1@news5.zwoll1.ov.home.nl>
Message-ID: <euf8lh$uvn$1@sea.gmane.org>


"Anton Vredegoor" <anton.vredegoor at gmail.com> wrote in message 
news:eueu79$mkd$1 at news5.zwoll1.ov.home.nl...
| Terry Reedy wrote:
|
| > One could generate the items in order in less space by doing, for 
instance,
| > an m-way merge, in which only the lowest member of each of the m 
sublists
| > is present at any one time.  But I don't know if this (which is
| > O(m*n*log(m))) would be any faster (in some Python implementation) for 
any
| > particular values of m and m.
|
| If hashing is O(n+m), it would mean that it would be faster.
|
| I'm not sure if I can agree with your analysis. All information to
| generate the product is already inside the two lists we begin with.
| Doesn't that make the product less complex than a random n*m matrix? Or
| is that what you are saying with O(m*n*log(m)) ?

If I understand correctly, you want to multiiply each of m numbers by each 
of n numbers, giving m*n products.  That is O(m*n) work.  Inserting (and 
extracting) each of these is a constant size m priority cue takes, I 
believe, O(log(m)) work, for a total of m*n*log(m).  That is faster than 
O(m*n*log(m*n)) for sorting m*n random numbers.

I don't know how you would sort by hashing.

Terry Jan Reedy





From skip at pobox.com  Thu Mar  1 07:10:20 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 1 Mar 2007 06:10:20 -0600
Subject: Reading csv files using SQL
In-Reply-To: <45e6731d$0$4786$4fafbaef@reader4.news.tin.it>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>
	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>
	<45e6731d$0$4786$4fafbaef@reader4.news.tin.it>
Message-ID: <17894.49836.731630.594575@montanaro.dyndns.org>


    >> You could maybe use SQLite to load the CSV file and process in an
    >> actual DBMS...

    Pablo> Ok, this is the solution I'm using actually (with PostGres).  My
    Pablo> hope is to find a way to do the same thing without using a DBMS
    Pablo> but working directly with the files.

If you want to work directly with the files why not just use Python's csv
module?

Skip



From deets at nospam.web.de  Tue Mar 20 06:32:51 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 Mar 2007 11:32:51 +0100
Subject: XML based programming language
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
	<567h7sF287idqU1@mid.uni-berlin.de>
	<1174332767.221788.252460@l77g2000hsb.googlegroups.com>
Message-ID: <569rijF27v71vU1@mid.uni-berlin.de>

stefaan wrote:

>> All of these are grammar-specifications that allow you to define the
>> structure of your XML-documents with more constraints.
> 
> Ok, I should have foreseen the schema checker answer...my point really
> is that
> yacc can do even more than just checking the conformance to a grammar.
> 
> It also allows me to specify semantic actions,
> e.g. to help in building an abstract syntax tree from
> the concrete syntax tree, or to implement a very basic
> interpreter...
> 
> mock example:
> <input><definevar name="a" value="10"/><definevar name="b" value="12" /
>></input>
> <output><sum arg1="a" arg2="b"/></output>
> 
> No schema checker can take this specification and simply output "22".
> XSLT might be able to implement it, but it is complex for anything
> real-life. Elementtree can immediately give me the concrete syntax
> tree,
> but any semantic actions have to be implemented during a
> manually programmed tree traversal.

Yep, they have. But to be brutally honest: I haven't felt the need to go
with semantic actions when using e.g. ANTLR. IMHO it only works for small
examples like the one above. The mixing of syntactic structure definition
together with "real" code gets really messy, and you are very rigid
regarding even smaller grammar changes.

The very moment you are getting more complex, you want an AST, and work upon
that. It will be much easier and robust to work on it, even if you alter
your grammar a bit.

And XML _is_ your AST, and working on it means... writing code. 
*If* there was anything as yacc regarding semantic actions, it would be an
extension to XSD or any other schema. I'm not aware of such a beast.

Diez


From b.r.willems at gmail.com  Thu Mar 22 12:57:36 2007
From: b.r.willems at gmail.com (Bart Willems)
Date: Thu, 22 Mar 2007 12:57:36 -0400
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <1174495236.067618.69030@l77g2000hsb.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174493856.663144.236880@y80g2000hsf.googlegroups.com>
	<1174495236.067618.69030@l77g2000hsb.googlegroups.com>
Message-ID: <RuyMh.34$ek6.6@newsfe12.lga>

dmitrey wrote:
> 1st still is shorter by 1 char; considering majority of people use
> space after comma & number of parameters can be big it yileds
> foo bar baz bar2 bar3 bar4
> vs
> foo(bar, baz, bar2, bar3, bar4)

I think most readers already agree on the ambiguities part. Now, for the 
length of the code...
I agree that in you example the first syntax yields a full /five/ spaces 
less than the second syntax. However, it ignores the fact that if you 
are creating functions with that many arguments, you are probably doing 
something wrong. Can't those arguments be provided as a list?
Let's see what is shorter:

foo bar baz bar2 bar3 bar4
or
foo *bars

Not to mention that it might (or might not) be a good idea to wrap the 
function in some kind of class where you can specify a whole bunch of 
attributes, so that you do not have to call a function with that many 
arguments to start with.

Regards,
Bart


From alisonken1 at gmail.com  Tue Mar 13 18:22:42 2007
From: alisonken1 at gmail.com (alisonken1)
Date: 13 Mar 2007 15:22:42 -0700
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <mailman.4931.1173605647.32031.python-list@python.org>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<mailman.4931.1173605647.32031.python-list@python.org>
Message-ID: <1173824562.014775.309050@y66g2000hsf.googlegroups.com>

On Mar 11, 2:34 am, "Mike Schinkel" <mikeschin... at gmail.com> wrote:
> Hi,
>
> I'm relatively new to Python but have lots of prior programming experience
> as a developer, instructor, and author (ASP/VBScript/SQL Server and
> Clipper.)
>

<snip>

> --
> -Mike Schinkelhttp://www.mikeschinkel.com/blogs/http://www.welldesignedurls.orghttp://atlanta-web.org-http://t.oolicio.us

Well, when the Master Chief and I were writing Clipper code too many
moons ago, we wrote a basic script that read the text, along with a
list of keywords (indent kw, matching detent kw).

All leading whitespace was removed as the line was read, then keeping
track of the appropriate current level of indent, re-write the leading
whitespace.

For printouts, we would add the appropriate IBM characters for lines
to keep track of matching indent/detent kw's were and could keep track
of where the routines would fall off due to incorrect detent kw usage.

If you don't know what the context is as far as indent/detent kw's
are, then it gets to be a problem figuring it out unless there is
specified characters used to indicate indent/detent issues.



From sickcodemonkey at gmail.com  Thu Mar  8 16:23:06 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Thu, 8 Mar 2007 16:23:06 -0500
Subject: SQLAlchemy and Oracle Functions?
In-Reply-To: <1173388259.974981.104090@j27g2000cwj.googlegroups.com>
References: <1173388259.974981.104090@j27g2000cwj.googlegroups.com>
Message-ID: <2adc542f0703081323q12899078he08c53f084c6a876@mail.gmail.com>

Helpful Links
    http://sourceforge.net/projects/cx-oracle

    http://www.python.net/crew/atuining/cx_Oracle/html/cursorobj.html

======================
Example:
Replace the data types as appropriate.

v_Vars = v_Cursor.setinputsizes(p_Result = cx_Oracle.NUMBER)
v_Cursor.execute("""
    begin
      :p_Result := sch.pkg.myfunction(:p_Param1, :p_Param2, :p_Param3);
    end;""",
    p_Param1 = 1,
    p_Param2 = "Some string",
    p_Param3 = "A different string")
print "Result:", v_Vars["p_Result"].getvalue()



On 8 Mar 2007 13:11:00 -0800, Greg Copeland <gtcopeland at gmail.com> wrote:
>
> I have  a need to call an Oracle function, which is not the same thing
> as a stored procedure.  Can SQLAlchemy do this directly?  Indirectly?
> If so, an example would be appreciated.  If not, how do I obtain the
> raw cx_Oracle cursor so I can use that directly?
>
> Thanks,
>
> Greg
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From beliavsky at aol.com  Mon Mar 26 18:35:01 2007
From: beliavsky at aol.com (Beliavsky)
Date: 26 Mar 2007 15:35:01 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174916449.171929.138950@n76g2000hsh.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916449.171929.138950@n76g2000hsh.googlegroups.com>
Message-ID: <1174948501.049674.191350@y80g2000hsf.googlegroups.com>

On Mar 26, 8:40 am, kyoso... at gmail.com wrote:
> On Mar 26, 8:20 am, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
>
> > OK...
> > I've been told that Both Fortran and Python are easy to read, and are
> > quite useful in creating scientific apps for the number crunching, but
> > then Python is a tad slower than Fortran because of its a high level
> > language nature, so what are the advantages of using Python for
> > creating number crunching apps over Fortran??
> > Thanks
> > Chris
>
> While I have never personally dealt withFortran, I looked it up here:
>
> http://en.wikipedia.org/wiki/Fortran_code_examples
>
> The code examples speak for themselves. I recommend you look those
> over and then look over similar simple program written in Python.

Code written using the features of modern Fortran (90 or later),
including free source form, looks better than code written in Fortran
66 or 77. Except that Fortran uses keywords to terminate blocks rather
than indentation as in Python, properly indented Fortran does not look
much different from Python. Neither language requires curly braces or
semicolons to terminate blocks and lines.

It does not make sense to argue against programming in Fortran 95 now
because of limitations that were removed long ago.



From rhamph at gmail.com  Mon Mar 12 16:10:19 2007
From: rhamph at gmail.com (Rhamphoryncus)
Date: 12 Mar 2007 13:10:19 -0700
Subject: threading and iterator crashing interpreter
In-Reply-To: <1173623758.054666.18190@s48g2000cws.googlegroups.com>
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
	<1173617253.901671.136910@q40g2000cwq.googlegroups.com>
	<mailman.4939.1173619757.32031.python-list@python.org>
	<1173623758.054666.18190@s48g2000cws.googlegroups.com>
Message-ID: <1173730219.561059.165340@c51g2000cwc.googlegroups.com>

On Mar 11, 8:35 am, "Janto Dreijer" <jan... at gmail.com> wrote:
> On Mar 11, 3:27 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
> > At least, the problem of using the same generator from different threads
> > still remains, if you don't use my modified code. In general, when using
> > multiple threads you always need some way to syncronize access to shared
> > objects. You are lucky with Sessions because append is an atomic operation
> > on lists; for more information see  http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-threa...
>
> Again you're right. But even putting a try-except:return around the
> random.choice still manages to break the interpreter. I'm not looking
> for any meaningful output really. I just want it not to break.

I think you need to clarify what you mean by "break".  Python tries to
prevent C-level corruption (segfaults, etc), but does NOT attempt to
prevent python-level corruption.  The python-level corruption will
*probably* be localized (and the objects involved could be deleted, no
harm done), but there's no guarantee that they won't involve some
global too.

But the examples you give involve C-level corruption.  They're not
using some low-level interface either, so they're genuine bugs.

login1 did segfault for me, but the output is random and usually very
long.  login2 is somewhat random as well, but much shorter and to the
point:

Exception exceptions.SystemError: '../Python/traceback.c:96: bad
argument to internal function' in <generator object at 0xa7956aec>
ignored
Exception exceptions.SystemError: '../Python/traceback.c:96: bad
argument to internal function' in <generator object at 0xa79569ac>
ignored
Exception exceptions.SystemError: '../Python/traceback.c:96: bad
argument to internal function' in <generator object at 0xa795656c>
ignored
Exception exceptions.SystemError: '../Python/traceback.c:96: bad
argument to internal function' in <generator object at 0xa795ebec>
ignored
Segmentation fault

Blah!  I was trying to trace it down, but then the phase of the moon
changed and login2 (as well as my variations therein) stopped
failing.  login1 still segfaults though.  And login1 does sometimes
give me that weird restricted mode error, so you're not alone.

I do remember reading something about generators having a pointer to
the thread they're created in, and having problems when migrated
between threads.  I don't have time to find the posts or bug reports
right now, but at least that gives you something to look for (before
filing a bug report).

Actually, I have a few more minutes.
http://mail.python.org/pipermail/python-dev/2006-October/069470.html
http://sourceforge.net/tracker/index.php?func=detail&aid=1579370&group_id=5470&atid=105470

That refers to a generator crash.  You are using generators, but also
getting a weird dict error.  Maybe related, maybe not.

I'll figure out if I've got a "fixed" version or not when I get back.



From gtcopeland at gmail.com  Thu Mar  8 17:20:00 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 8 Mar 2007 14:20:00 -0800
Subject: SQLAlchemy and Oracle Functions?
In-Reply-To: <1173389744.483855.230520@q40g2000cwq.googlegroups.com>
References: <1173388785.133560.146300@p10g2000cwp.googlegroups.com>
	<1173389744.483855.230520@q40g2000cwq.googlegroups.com>
Message-ID: <1173392400.206192.228400@8g2000cwh.googlegroups.com>

On 8 Mar, 15:35, "Giles Brown" <giles_br... at hotmail.com> wrote:
> On 8 Mar, 22:19, "Greg Copeland" <gtcopel... at gmail.com> wrote:
>
> > I'm using SQLAlchemy and have a need to call an Oracle function; which
> > is not the same as a stored procedure.  Can this be done directory or
> > indirectly with SQLAlchemy?  If so, can someone please provide an
> > example?  If not, how do I obtain the raw cx_Oracle cursor so I can
> > use callfunc directly on that?
>
> > Thanks,
>
> > Greg
>
> http://www.sqlalchemy.org/docs/sqlconstruction.myt#sql_whereclause_fu...
> ?
>
> SQLAlchemy has its own google group
>
> http://groups.google.co.uk/group/sqlalchemy
>
> You could try asking there too.
>
> Giles


I think I spoke too soon!  Are SQL functions which have out arguments
not allowed?  I get:
sqlalchemy.exceptions.SQLError: (DatabaseError) ORA-06572: Function
blah has out arguments.

Seems google is having problems right now too.  I tried to join but it
just times out so I am currently unable to post to the sqlalchemy
google group.

Anthing special I need to do to call an Oracle function via the func
method, which also has output parameters?


Greg



From aleax at mac.com  Sun Mar 11 14:59:53 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 11:59:53 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
Message-ID: <1hut7xu.5zs31l1cohfybN%aleax@mac.com>

Alex Martelli <aleax at mac.com> wrote:
   ...
> > Yup: the workaround seems to be as simple as replacing all occurrences
> > of -0.0 with -(0.0).  I'm embarrassed that I didn't figure this out
> > sooner.
> > 
> > >>> x, y = -(0.0), 0.0
> > >>> x, y
> > (-0.0, 0.0)
> 
> Glad it works for you, but it's the kind of workaround that could break
> with any minor tweak/optimization to the compiler... very fragile:-(.

OTOH, Python 2.4 works just fine...:

Python 2.4.3 (#1, Apr  7 2006, 10:54:33) 
[GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> 0.0,-0.0
(0.0, -0.0)
>>> -0.0,0.0
(-0.0, 0.0)

so it seems to be very specifically a 2.5 problem.


Alex


From greg at cosc.canterbury.ac.nz  Mon Mar 19 21:34:23 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 20 Mar 2007 13:34:23 +1200
Subject: Still the __new__ hell ...
In-Reply-To: <1174337519.926611@jubilee.claranet.pt>
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
	<1174337519.926611@jubilee.claranet.pt>
Message-ID: <568s5gF287c68U2@mid.individual.net>

Paulo da Silva wrote:
> As a relatively inexperient
> in python, how could I know that a 'string' is an instance of
> basestring?

   isinstance(x, basestring)

This works because basestring is defined as the
tuple (str, unicode) and isinstance accepts a
tuple of types as well as just a single type.

--
Greg


From __peter__ at web.de  Sun Mar 18 09:26:44 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 Mar 2007 14:26:44 +0100
Subject: encoding - arabic(IBM 864)  to UNICODE
References: <1174221139.794726.224860@o5g2000hsb.googlegroups.com>
Message-ID: <etjeim$j6m$01$1@news.t-online.com>

Madhu Alagu wrote:

> How to convert IBM 864,IBM 420 & Nafitha(Arabic)  to UNICODE.

You can treat them like every other encoding:

>>> s = '\xe1\xec\xf0\xe8\xe1' # *
>>> print s.decode("cp864") # convert from cp864 to unicode
?????
>>> s.decode("cp864").encode("utf8") # convert from cp864 to utf-8
'\xef\xbb\x93\xef\xbb\x8c\xef\xb9\xbd\xef\xbb\xad\xef\xbb\x93'

To read from or write to a file you can codecs.open() which allows you to
specify an encoding.

Peter

(*) these are arbitrary characters generated by 
"".join(chr(ord(c)+128) for c in "alpha") 
since I don't know Arabic.


From marcin.ciura at poczta.NOSPAMonet.pl  Wed Mar 21 18:42:45 2007
From: marcin.ciura at poczta.NOSPAMonet.pl (Marcin Ciura)
Date: Wed, 21 Mar 2007 23:42:45 +0100
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
Message-ID: <etscd5$g0g$1@news.onet.pl>

Steven D'Aprano wrote:
>>>>x, y, z = 1, 2, 3
>>>>x = y = z
>>>>x, y, z
> 
> (3, 3, 3)
> 
> I certainly wouldn't expect to get (2, 3, 3).

Neither would I. I must have expressed myself not clearly enough.
Currently
x = y = z
is roughly equivalent to
x = z
y = z
I propose to change it to
y = z
x = z
Cheers,
   Marcin


From michael at jedimindworks.com  Tue Mar 27 02:26:13 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Tue, 27 Mar 2007 01:26:13 -0500
Subject: enumerating processes
In-Reply-To: <3abd07c80703262307q4a0b4a7ake26d0863c9445ff7@mail.gmail.com>
References: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>
	<4608A870.5000302@ncee.net>
	<3abd07c80703262307q4a0b4a7ake26d0863c9445ff7@mail.gmail.com>
Message-ID: <71DF272F-A087-4EC8-81CA-B0A8B522CC4D@jedimindworks.com>


On Mar 27, 2007, at 1:07 AM, ??? wrote:
> thanks for your help, but that is not what I am looking for. My  
> question is: I need to determine whether another process is running  
> now ---in my problem, that is 'tomcat5.exe' ---that determines what  
> should I do next.

Maybe this can help:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303339




From bj_666 at gmx.net  Thu Mar  8 11:02:56 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 08 Mar 2007 17:02:56 +0100
Subject: heapq.heappush and pop to use key
References: <1173364305.281085.271320@t69g2000cwt.googlegroups.com>
Message-ID: <pan.2007.03.08.16.02.54.895923@gmx.net>

In <1173364305.281085.271320 at t69g2000cwt.googlegroups.com>,
jm.suresh at no.spam.gmail.com wrote:

> I wanted to have a heap of custom objects, and in different heaps I
> wanted to have the weights for my elements differently. So, I modified
> the heapq module to accept key arguments also.

I would have just used tuples of the form (weight, obj) with the original
`heapq` module.

Ciao,
	Marc 'BlackJack' Rintsch


From spe.stani.be at gmail.com  Tue Mar 27 11:29:30 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 27 Mar 2007 08:29:30 -0700
Subject: SPE question
In-Reply-To: <1174996878.984641.246640@o5g2000hsb.googlegroups.com>
References: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
	<1174991839.417993.295570@y80g2000hsf.googlegroups.com>
	<mailman.5665.1174994903.32031.python-list@python.org>
	<1174996878.984641.246640@o5g2000hsb.googlegroups.com>
Message-ID: <1175009370.443069.256900@e65g2000hsc.googlegroups.com>

On 27 Mrz., 14:01, "psarouda... at gmail.com" <psarouda... at gmail.com>
wrote:
> I believe that just deleting the folders should work....

No, never delete the folder if you used the windows installer (*.exe)!
Go to your control panel>Add/Remove Programs and there should be an
entry "python*-spe*" with an uninstall button. Probably you were only
looking for a SPE entry. Python modules are often listed with a python
prefix.

Stani

>
> Dick Moores wrote:
> > At 03:37 AM 3/27/2007, irs... at gmail.com wrote:
> > >On Mar 27, 11:39 am, "alain" <alainpo... at yahoo.fr> wrote:
> > > > Hi,
>
> > > > Could someone tell me how to uninstallSPEunder windows?
>
> > > > Alain
>
> > >Dunno aboutSPE, but most Python modules I've installed can
> > >be uninstalled from control panel/add remove programs.
>
> >SPEdoesn't show up on my win XP add/remove programs list.
>
> > Dick Moores




From gagsl-py2 at yahoo.com.ar  Thu Mar  8 21:30:01 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 23:30:01 -0300
Subject: Coding a scheduled journal application
References: <1173397365.189973.121680@t69g2000cwt.googlegroups.com>
Message-ID: <op.towg8blbx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 20:42:45 -0300, kpierce8 at gmail.com  
<kpierce8 at gmail.com> escribi?:

> I guess the
> question is how to get it to run in the background and pop-up at the
> appropriate times?

Use cron on linux or the task scheduler on windows

-- 
Gabriel Genellina



From kbk at shore.net  Sun Mar 11 20:27:51 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Sun, 11 Mar 2007 19:27:51 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200703120027.l2C0RpKe005438@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  380 open (-36) /  3658 closed (+65) /  4038 total (+29)
Bugs    :  965 open ( -9) /  6555 closed (+35) /  7520 total (+26)
RFE     :  272 open ( +4) /   253 closed ( +2) /   525 total ( +6)

New / Reopened Patches
______________________

Extension documentation for subclasses  (2007-03-01)
CLOSED http://python.org/sf/1671450  opened by  Pete Shinners

MultiCall bug crashing the config dialog  (2007-03-02)
CLOSED http://python.org/sf/1672481  opened by  Tal Einat

urllib2 requests history + HEAD support  (2007-03-03)
       http://python.org/sf/1673007  opened by  KDanilov aka koder

README update: Bash default on ac OS X  (2007-03-03)
CLOSED http://python.org/sf/1673121  opened by  Witten

Mac OS X: libtool  (2007-03-03)
       http://python.org/sf/1673122  opened by  Witten

change repr(...) from 'Ellipsis' to '...'  (2007-03-04)
CLOSED http://python.org/sf/1673355  opened by  John Reese

Identify modules to be built and not built  (2007-03-04)
CLOSED http://python.org/sf/1673619  opened by  Skip Montanaro

'G' formatting doesn't catch same errors as 'g'  (2007-03-04)
       http://python.org/sf/1673759  opened by  Eric V. Smith

Identify modules which couldn't be built  (2007-03-04)
CLOSED http://python.org/sf/1673619  reopened by  loewis

sq_ass_slice ignored if  sq_slice not defined  (2007-03-05)
CLOSED http://python.org/sf/1674228  opened by  ?iga Seilnacht

Epoll wrapper  (2007-03-06)
       http://python.org/sf/1675118  opened by  TH

Draft implementation for PEP 364  (2007-03-06)
       http://python.org/sf/1675334  opened by  Barry A. Warsaw

PEP 3114 -- next() -> __next__()  (2007-03-07)
       http://python.org/sf/1675363  opened by  Georg Brandl

Make PyComplex_AsCComplex use __complex__  (2007-03-07)
       http://python.org/sf/1675423  opened by  Mark Dickinson

Zipfile tweaks and test coverage improvement  (2007-03-06)
       http://python.org/sf/1675424  opened by  Alan McIntyre

Use getaddrinfo() in urllib2.py for IPv6 support  (2007-03-07)
       http://python.org/sf/1675455  opened by  David Cantrell

Refactor test_pty.py to use unittest.  (2007-03-06)
CLOSED http://python.org/sf/1675471  opened by  Jerry Seutter

[gzip] Performance for small reads and fix seek problem  (2007-03-07)
       http://python.org/sf/1675951  opened by  Florian Festi

Remove dead code in typeobject's type_new()  (2007-03-07)
CLOSED http://python.org/sf/1675981  opened by  ?iga Seilnacht

Remove trailing slash from --prefix  (2007-03-07)
       http://python.org/sf/1676135  opened by  Bj?rn Lindqvist

New File I/O type for Python 3000, plus .h and unit tests  (2007-02-28)
CLOSED http://python.org/sf/1671314  reopened by  collinwinter

Add a PeriodicTimer to threading  (2007-03-08)
       http://python.org/sf/1676820  opened by  Bj?rn Lindqvist

Adding timeout to socket.py and httplib.py  (2007-03-08)
       http://python.org/sf/1676823  opened by  Facundo Batista

Refactor test_popen2.py to use unittest.  (2007-03-08)
       http://python.org/sf/1676994  opened by  Jerry Seutter

Support CREATE_SUSPENDED flag in subprocess.py for Win32  (2007-03-09)
       http://python.org/sf/1677688  opened by  Chris Heller

site.py small ?bug fix | change?  (2007-03-10)
       http://python.org/sf/1677862  opened by  KDanilov aka koder

Efficient reverse line iterator   (2007-03-10)
       http://python.org/sf/1677872  opened by  Mark Russell

Removal of Tuple Parameter Unpacking [PEP3113]  (2007-03-10)
       http://python.org/sf/1678060  opened by  Tony Lownds

improve telnetlib.Telnet so option negotiation becomes easie  (2007-03-10)
       http://python.org/sf/1678077  opened by  Bj?rn Lindqvist

Refactor test_operations.py to use unittest.  (2007-03-10)
       http://python.org/sf/1678088  opened by  Jerry Seutter

Adding a testcase for the bug in find_longest_match  (2007-03-11)
       http://python.org/sf/1678339  opened by  Denys Rtveliashvili

A fix for the bug #1528074 [warning: quite slow]  (2007-03-11)
       http://python.org/sf/1678345  opened by  Denys Rtveliashvili

Patches Closed
______________

Extension documentation for subclasses  (2007-03-01)
       http://python.org/sf/1671450  closed by  gbrandl

MultiCall bug crashing the config dialog  (2007-03-02)
       http://python.org/sf/1672481  closed by  gbrandl

README update: Bash default on Mac OS X  (2007-03-03)
       http://python.org/sf/1673121  closed by  gbrandl

change repr(...) from 'Ellipsis' to '...'  (2007-03-04)
       http://python.org/sf/1673355  closed by  gvanrossum

Use a set to keep interned strings  (2006-06-16)
       http://python.org/sf/1507011  closed by  loewis

Add support for the If-Modified-Since header  (2006-03-04)
       http://python.org/sf/1442867  closed by  loewis

N-d array interface for array object  (2006-03-18)
       http://python.org/sf/1452906  closed by  loewis

Fix for win32 proxy bypass support (no_proxy) in urllib(2)  (2005-03-01)
       http://python.org/sf/1154227  closed by  loewis

Names conflict with QT (on linux)  (2005-03-08)
       http://python.org/sf/1158926  closed by  loewis

PYTHONBYTECODEBASE patch (PEP 304)  (2003-01-29)
       http://python.org/sf/677103  closed by  loewis

Identify modules which couldn't be built  (2007-03-04)
       http://python.org/sf/1673619  closed by  montanaro

Identify modules which couldn't be built  (2007-03-04)
       http://python.org/sf/1673619  closed by  loewis

sq_ass_slice ignored if  sq_slice not defined  (2007-03-05)
       http://python.org/sf/1674228  closed by  gbrandl

Add syntax for dynamic attribute access  (2007-02-11)
       http://python.org/sf/1657573  closed by  bennorth

ZipFile.open - read-only file-like obj for files in archive  (2005-02-12)
       http://python.org/sf/1121142  closed by  loewis

2 Tools for easy inter-thread communication->Queue,threading  (2006-03-20)
       http://python.org/sf/1454452  closed by  loewis

Patch to implement PEP 351  (2005-10-23)
       http://python.org/sf/1335812  closed by  bwarsaw

PEP 343 implementation  (2005-07-11)
       http://python.org/sf/1235943  closed by  gbrandl

Fix for #947380 - sys.path is wrong on windows sometimes  (2004-05-04)
       http://python.org/sf/947386  closed by  zseil

enable "python -m doctest FILE" to run tests in FILE  (2007-02-19)
       http://python.org/sf/1663234  closed by  gbrandl

small sanity checks for user-defined mros  (2005-03-15)
       http://python.org/sf/1163731  closed by  loewis

add None values in SimpleXMLRPCServer  (2006-12-18)
       http://python.org/sf/1618485  closed by  collinwinter

HTMLParser should support entities in attributes  (2004-03-09)
       http://python.org/sf/912410  closed by  loewis

Little (improvement and standarization) to asyncore.  (2004-03-11)
       http://python.org/sf/914096  closed by  josiahcarlson

gzip.GzipFile to accept stream as fileobj.  (2004-03-11)
       http://python.org/sf/914340  closed by  gbrandl

operator.c slice functions need to parse ssize_t  (2007-02-07)
       http://python.org/sf/1654417  closed by  gbrandl

ConfigParser getboolean() consistency  (2007-01-28)
       http://python.org/sf/1646432  closed by  gbrandl

clarify comparison return values  (2006-11-24)
       http://python.org/sf/1602128  closed by  gbrandl

Fix to the long("123\0", 10) problem  (2007-01-18)
       http://python.org/sf/1638879  closed by  gbrandl

Implementation of PEP 362  (2006-08-22)
       http://python.org/sf/1544909  closed by  bcannon

Improved profiler  (2005-06-01)
       http://python.org/sf/1212837  closed by  arigo

fix bug #670311: sys.exit and PYTHONINSPECT  (2003-03-04)
       http://python.org/sf/697613  closed by  gbrandl

Fix strange warnings from interpreter if PYTHONSTARTUP used  (2003-03-14)
       http://python.org/sf/703779  closed by  gbrandl

glob doesn't return unicode with no dir in unicode filename  (2004-08-01)
       http://python.org/sf/1001604  closed by  gbrandl

dircache fix; raise like os.listdir, plus optimization  (2004-07-25)
       http://python.org/sf/997726  closed by  gbrandl

Refactor test_pty.py to use unittest.  (2007-03-07)
       http://python.org/sf/1675471  closed by  gbrandl

More precise realm parsing in AbstractBasicAuthHandler  (2003-09-25)
       http://python.org/sf/812285  closed by  gbrandl

Add a test suite for unittest  (2006-09-01)
       http://python.org/sf/1550272  closed by  gbrandl

Fix numerous bugs in unittest  (2006-09-01)
       http://python.org/sf/1550273  closed by  gbrandl

unittest.py: Custom TestRunners and --verbose  (2003-08-13)
       http://python.org/sf/787789  closed by  gbrandl

set comprehensions  (2006-08-29)
       http://python.org/sf/1548388  closed by  gbrandl

ConfigParser to save with order  (2006-01-07)
       http://python.org/sf/1399309  closed by  facundobatista

Remove dead code in typeobject's type_new()  (2007-03-07)
       http://python.org/sf/1675981  closed by  zseil

Fixes SocketServer Bug 1531963  (2006-08-22)
       http://python.org/sf/1545011  closed by  collinwinter

Unification of list-comp and for syntax  (2006-05-21)
       http://python.org/sf/1492509  closed by  collinwinter

Complex representation  (2006-05-19)
       http://python.org/sf/1491866  closed by  collinwinter

Remove operator.truth() and operator.abs()  (2006-07-13)
       http://python.org/sf/1522059  closed by  collinwinter

XML Test Runner for unittest module  (2006-07-14)
       http://python.org/sf/1522704  closed by  collinwinter

New File I/O type for Python 3000, plus .h and unit tests  (2007-02-28)
       http://python.org/sf/1671314  closed by  collinwinter

New File I/O type for Python 3000, plus .h and unit tests  (2007-02-28)
       http://python.org/sf/1671314  closed by  gvanrossum

ast branch changed interactive module name  (2006-06-25)
       http://python.org/sf/1512007  closed by  collinwinter

Patch for bug #1380970  (2006-01-25)
       http://python.org/sf/1414934  closed by  collinwinter

email.utils.parsedate documentation  (2007-01-19)
       http://python.org/sf/1639973  closed by  collinwinter

Module fixedlenfields for standard lib  (2005-11-29)
       http://python.org/sf/1369028  closed by  collinwinter

don't use '-' and '_' in mkstemp  (2007-02-25)
       http://python.org/sf/1668482  closed by  collinwinter

Strobe Timer for guis  (2005-09-26)
       http://python.org/sf/1304895  closed by  collinwinter

Fix for bug 494589  (2002-12-25)
       http://python.org/sf/658599  closed by  nnorwitz

Support of HTTP_REFERER in CGIHTTPServer.py  (2006-05-03)
       http://python.org/sf/1481079  closed by  collinwinter

Improves an error message from setattr  (2006-06-26)
       http://python.org/sf/1512942  closed by  collinwinter

RFE: Extend smtplib.py with support for LMTP  (2004-05-19)
       http://python.org/sf/957003  closed by  loewis

TCPServer option to bind and activate  (2006-11-20)
       http://python.org/sf/1599845  closed by  collinwinter

os.py: base class _Environ on dict instead of UserDict  (2005-01-02)
       http://python.org/sf/1094387  closed by  collinwinter

Add missing types to __builtin__  (2004-08-16)
       http://python.org/sf/1009811  closed by  collinwinter

Patch for 1115886 - splitext incorrectly handles filenames l  (2006-03-31)
       http://python.org/sf/1462106  closed by  loewis

New / Reopened Bugs
___________________

python code fails with "MemoryError" on HP-UX 11.11 PA_RISC   (2007-03-01)
CLOSED http://python.org/sf/1671411  opened by  shashi

test_mailbox is hanging while doing gmake test on HP-UX v3  (2007-03-01)
       http://python.org/sf/1671676  opened by  shashi

shutil.copy2 modifies decimal part of last modification time  (2007-03-01)
CLOSED http://python.org/sf/1671965  opened by  Guy Dalberto

cPickle can pickle, but cannot unpickle on 64bit machines  (2007-03-02)
       http://python.org/sf/1672332  opened by  Bartlomiej Ogryczak

Building python 2.5 for AMD64 (windows) and VS2005  (2007-03-02)
       http://python.org/sf/1672336  opened by  fred2k

datetime.fromtimestamp fails with negative fractional times  (2007-01-28)
CLOSED http://python.org/sf/1646728  reopened by  gvanrossum

silent error in email.message.Message.get_payload  (2007-03-02)
       http://python.org/sf/1672568  opened by  Renaud Blanch

Error reading files larger than 4GB  (2007-03-03)
       http://python.org/sf/1672853  opened by  Case Van Horsen

date-datetime comparison doesn't work  (2007-03-04)
       http://python.org/sf/1673403  opened by  Jon Ribbens

None-datetime comparison doesn't work  (2007-03-04)
CLOSED http://python.org/sf/1673405  opened by  Jon Ribbens

datetime module missing some important methods  (2007-03-04)
       http://python.org/sf/1673409  opened by  Jon Ribbens

string and unicode formatting are missing a test for "G"  (2007-03-04)
       http://python.org/sf/1673757  opened by  Eric V. Smith

2.4.4 Logging LogRecord attributes broken  (2007-02-26)
CLOSED http://python.org/sf/1669498  reopened by  murrayg

Unicode xmlcharrefreplace produces backslash not xml style.  (2007-03-05)
CLOSED http://python.org/sf/1674223  opened by  Stanley Sokolow

execfile() response to syntax errors  (2007-03-05)
CLOSED http://python.org/sf/1674503  opened by  Jonathan Griffitts

Python 2.5 testsuite sys.path contains system dirs  (2007-03-06)
       http://python.org/sf/1674555  opened by  Theodoros V. Kalamatianos

Redirect cause invalid descriptor error  (2007-03-06)
       http://python.org/sf/1675026  opened by  Jean-Marc Ranger

Python still uses broken -xcode option on Solaris/x86  (2007-03-07)
       http://python.org/sf/1675511  opened by  Carson Gaspar

random.randint fails on lists  (2007-03-07)
CLOSED http://python.org/sf/1675516  opened by  sardonics

setup.py LDFLAGS regexp is wrong  (2007-03-07)
       http://python.org/sf/1675533  opened by  Carson Gaspar

Python2.5 can't read a (complex) pickle build by python2.4  (2007-03-07)
       http://python.org/sf/1675967  opened by  Michael Vogt

Problem linking to readline lib on x86(64) Solaris  (2007-03-07)
       http://python.org/sf/1676121  opened by  Alexander Belopolsky

scheduler.empty() in module sched appears broken  (2007-03-08)
CLOSED http://python.org/sf/1676321  opened by  Mark

Stdlib reference is in italics  (2007-03-08)
CLOSED http://python.org/sf/1676656  opened by  Bj?rn Lindqvist

Complex OverflowError has a typo  (2007-03-09)
CLOSED http://python.org/sf/1676971  opened by  John Dong

test_timeout refactoring  (2007-03-10)
       http://python.org/sf/1677694  opened by  Bj?rn Lindqvist

zlib.crc32() not cross-platform  (2007-03-10)
       http://python.org/sf/1678102  opened by  Ben Collver

0.0 and -0.0 identified, with surprising results  (2007-03-11)
       http://python.org/sf/1678380  reopened by  marketdickinson

0.0 and -0.0 identified, with surprising results  (2007-03-11)
       http://python.org/sf/1678380  opened by  Mark Dickinson

StringIO / cStringIO inconsistency with unicode  (2007-03-11)
CLOSED http://python.org/sf/1678411  opened by  Armin Rigo

Weird behavior Exception with unicode string  (2007-03-11)
       http://python.org/sf/1678647  opened by  Leandro Lucarella

Bugs Closed
___________

python code fails with "MemoryError" on HP-UX 11.11 PA_RISC   (2007-03-01)
       http://python.org/sf/1671411  closed by  loewis

Python needs a way to detect implementation  (2007-02-27)
       http://python.org/sf/1669743  closed by  loewis

Pydoc sets choices for doc locations incorrectly  (2007-01-05)
       http://python.org/sf/1628895  closed by  gbrandl

shutil.copy2 modifies decimal part of last modification time  (2007-03-01)
       http://python.org/sf/1671965  closed by  loewis

datetime.fromtimestamp fails with negative fractional times  (2007-01-29)
       http://python.org/sf/1646728  closed by  gbrandl

datetime.fromtimestamp fails with negative fractional times  (2007-01-28)
       http://python.org/sf/1646728  closed by  gvanrossum

Clarify PyMem_Realloc and PyMem_Resize docs  (2007-02-26)
       http://python.org/sf/1669304  closed by  gbrandl

PyMem_Realloc docs don't specifiy out-of-mem behavior  (2007-02-24)
       http://python.org/sf/1668032  closed by  gbrandl

PyMem_Resize docs don't specify that it modifies an argument  (2007-02-24)
       http://python.org/sf/1668036  closed by  gbrandl

None-datetime comparison doesn't work  (2007-03-04)
       http://python.org/sf/1673405  closed by  tim_one

2.4.4 Logging LogRecord attributes broken  (2007-02-26)
       http://python.org/sf/1669498  closed by  vsajip

Unicode xmlcharrefreplace produces backslash not xml style.  (2007-03-05)
       http://python.org/sf/1674223  closed by  doerwalter

curses should reset curses.{COLS,LINES} when term. resized  (2007-01-12)
       http://python.org/sf/1633621  closed by  doerwalter

execfile() response to syntax errors  (2007-03-05)
       http://python.org/sf/1674503  closed by  gbrandl

PyType_IsSubtype segfaults  (2007-02-19)
       http://python.org/sf/1663392  closed by  sf-robot

sys.path is wrong in some cases  (2004-05-04)
       http://python.org/sf/947380  closed by  gbrandl

inspect.getargspec() fails with keyword-only arguments  (2007-02-25)
       http://python.org/sf/1668565  closed by  bcannon

os.path.splitext don't handle unix hidden file correctly  (2005-02-04)
       http://python.org/sf/1115886  closed by  loewis

sys.exit and PYTHONINSPECT  (2003-01-18)
       http://python.org/sf/670311  closed by  gbrandl

-xcode=pic32 option is not supported on Solaris x86 Sun C  (2006-09-19)
       http://python.org/sf/1561333  closed by  gbrandl

random.randint fails on lists  (2007-03-07)
       http://python.org/sf/1675516  closed by  quiver

document that shutil.copyfileobj does not seek()  (2007-02-26)
       http://python.org/sf/1669331  closed by  gbrandl

shutil.copyfileobj description is incomplete  (2007-02-10)
       http://python.org/sf/1656578  closed by  gbrandl

Enhance and correct unittest's docs (redux)  (2006-09-01)
       http://python.org/sf/1550263  closed by  gbrandl

Handle: class MyTest(unittest.TestSuite)  (2004-01-16)
       http://python.org/sf/878275  closed by  gbrandl

scheduler.empty() in module sched appears broken  (2007-03-08)
       http://python.org/sf/1676321  closed by  rhettinger

Stdlib reference is in italics  (2007-03-08)
       http://python.org/sf/1676656  closed by  gbrandl

evaluated code filename changed to <module> instead of ?  (2006-06-29)
       http://python.org/sf/1514617  closed by  collinwinter

make_table in difflib does not work with unicode  (2007-01-17)
       http://python.org/sf/1637850  closed by  rhettinger

Complex OverflowError has a typo  (2007-03-08)
       http://python.org/sf/1676971  closed by  nnorwitz

documentation of email.utils.parsedate is confusing  (2007-01-06)
       http://python.org/sf/1629566  closed by  collinwinter

ctypes.string_at(buf, 0) is seen as zero-terminated-string  (2007-01-28)
       http://python.org/sf/1646630  closed by  theller

test_logging fails with reference count-checking enabled  (2006-07-04)
       http://python.org/sf/1516995  closed by  vsajip

ctypes.Structure formal parameter dies given tuple  (2007-02-03)
       http://python.org/sf/1651235  closed by  theller

SocketServer.TCPServer returns different ports  (2006-07-31)
       http://python.org/sf/1531963  closed by  collinwinter

Nested class __name__  (2002-11-05)
       http://python.org/sf/633930  closed by  gvanrossum

SocketServer allow_reuse_address checked in constructor  (2006-11-13)
       http://python.org/sf/1595742  closed by  collinwinter

StringIO / cStringIO inconsistency with unicode  (2007-03-11)
       http://python.org/sf/1678411  closed by  arigo

New / Reopened RFE
__________________

add identity function  (2007-03-04)
       http://python.org/sf/1673203  opened by  paul rubin

Make threading.Event().wait(timeout=3) return isSet  (2007-03-05)
       http://python.org/sf/1674032  opened by  David Fraser

funcName and module incorrectly reported in logging  (2007-03-05)
CLOSED http://python.org/sf/1674315  opened by  Michael Garvin

RFE Closed
__________

funcName and module incorrectly reported in logging  (2007-03-05)
       http://python.org/sf/1674315  closed by  gbrandl

Interpreter should be interruptable everywhere  (2004-10-08)
       http://python.org/sf/1043446  closed by  rhettinger



From aleax at mac.com  Sun Mar 11 13:33:36 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 10:33:36 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<Xns98F0B0821C330duncanbooth@127.0.0.1>
Message-ID: <1hut3r6.1bj4wo41a3uwgcN%aleax@mac.com>

Duncan Booth <duncan.booth at invalid.invalid> wrote:

> "Mark Dickinson" <dickinsm at gmail.com> wrote:
> 
> > I guess what's happening is that there's some optimization that avoids
> > creating two separate float objects for a float literal that appears
> > twice, and that optimization doesn't see the difference between 0. and
> > -0. 
> 
> Don't guess. Test.
> 
> >>> def f():
>       x = 0.0
>       y = -0.0
>       return x, y
> 
> >>> dis.dis(f)
>   2           0 LOAD_CONST               1 (0.0)
>               3 STORE_FAST               0 (x)
> 
>   3           6 LOAD_CONST               1 (0.0)
>               9 STORE_FAST               1 (y)
> 
>   4          12 LOAD_FAST                0 (x)
>              15 LOAD_FAST                1 (y)
>              18 BUILD_TUPLE              2
>              21 RETURN_VALUE        
> 
> Yes. Just the one constant there.

And yet, as I wrote in a parallel post (the result of quite some
exploration), Python/peephole.c takes specific precautions against
improperly "constant folding" for the unary-minus of 0.0 -- the
collapsing of 0.0 and -0.0 into the "same" constant must happen
elsewhere (I haven't found out where, yet) and doesn't happen in the
Python-coded compiler module.  So (on platforms where the underlying C
libraries do the right thing) I think this specific "overzealous
constant folding" must be considered a small bug -- and should be easy
to fix (by specialcasing -0.0 like Python/peephole.c does) if I could
but find out where in the Python sources the folding is happening...


Alex


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 13 04:55:34 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 09:55:34 +0100
Subject: Python in a desktop environment
In-Reply-To: <1173747820.728559.102360@q40g2000cwq.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<55lbl1F25geaaU1@mid.uni-berlin.de>
	<45f58642$0$1408$426a74cc@news.free.fr>
	<1173747820.728559.102360@q40g2000cwq.googlegroups.com>
Message-ID: <45f666fc$0$28796$426a34cc@news.free.fr>

David Cramer a ?crit :
> On Mar 12, 9:56 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Diez B. Roggisch a ?crit :
>>
>>> Bruno Desthuilliers wrote:
>>>> Grant Edwards a ?crit :
>>>> (snip)
>>>>> Python is _far_ more robust than C++.
>>>> I wouldn't say so - robustness is a quality of a program, not of a
>>>> language !-)
>>> Nope. Dealing with dangling references and double frees, complex
>>> copy-semantics that change only by a feeble character or via overloaded and
>>> thus hard to comprehend assignment operators are all properties of C++,
>> Indeed
>>
>>> and
>>> tremendously afflict robustness IMHO.
>> robustness of programs written with this language, yes.
>>
>> NB : I'm afraid the smiley got lost somewhere between screen and
>> readers, so here comes another one !-)
> 
> Everyone seems to have misunderstood what I want.

Possibly.

> I'm a Python
> developer, I don't give a rats ass about what people say about C#,
> Python, or c++, they all have their uses. My main reasoning for
> considering C++ as the backend is some things (reading memory for
> example) are much easier to do in C++ than in Python,

Depends. But anyway nothing prevents you from having a few functions in 
a C extension for this part...

> and we already
> have a lot written in C++.
 >
> The argument about robustness, has nothing to do with how nicely
> formatted the language is, or how great the tracebacks are,

Certainly not. It has to do with readability (which helps spotting 
obvious bugs), simplicity (which helps understanding the whole damn 
thing), and automatic memory management (which really makes a 
difference, even for seasonned C and C++ programmers).

> it's
> strictly about how high the memory cost is and how much CPU it's going
> to take. 

This is a performance issue, not a robustness issue. Wrong qualificative !-)

> Python is well known for being high on memory and C++ being
> compiled can be a lot faster for things.

Even compiled to native code, Python wouldn't probably be much faster - 
it's way too dynamic. Or this would require 30+ years of work (like 
we've seen for Lisp).

If you have performance-critical parts that can't be solved by a 
pure-python solution or a binding to an external lib, then yes, it makes 
sens to recode these parts in a lower-level language. But this is not 
exactly "a python front-end for a C++ backend", it's "a python program 
with some C or C++ extensions".

My 2 cents...


From uymqlp502 at sneakemail.com  Thu Mar 29 21:10:38 2007
From: uymqlp502 at sneakemail.com (Russ)
Date: 29 Mar 2007 18:10:38 -0700
Subject: how can I clear a dictionary in python
In-Reply-To: <460BEBE5.3030607@websafe.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com>
	<KP-dnXOp7ea8IZbbnZ2dnUVZ_oCmnZ2d@comcast.com>
	<460bcf46$0$23128$426a74cc@news.free.fr>
	<460BEBE5.3030607@websafe.com>
Message-ID: <1175217038.639561.181100@n59g2000hsh.googlegroups.com>

This little squabble got me thinking. I normally just use the
myDict={} method of "clearing" a
dictionary when I know there are no other references to it. However, I
wonder how the
efficiency of relying on the garbage collector to clear a dictionary
compares with using the
"clear" method. Does anyone know?



From bozho_remove_ at _rem_ove__.kset.org  Tue Mar  6 05:50:07 2007
From: bozho_remove_ at _rem_ove__.kset.org (Marko Bozikovic)
Date: Tue, 06 Mar 2007 11:50:07 +0100
Subject: IPython on Windows dir problem
Message-ID: <esjh1g$rl2$1@ss408.t-com.hr>

Hi all,

I have a small problem with IPython shell on Windows.

If I run 'python C:\python\scripts\ipython -p pysh' from cmd.exe or directly
from Run dialog, I don't get any output from 'shell' commands like ddir.

If I run ipython shell from 4NT, ddir and similar commands work fine.

Python version is 2.4.3 and IPython version is 0.6.15.

4NT doesn't set any new environment variables or modify existing ones (like PATH)

Any ideas?

Thnx,
-- 
Marko
ICQ: 5990814

I'm not under the alkafluence of inkahol
that some thinkle peep I am.
It's just the drunker I sit here the longer I get.


From eight02645999 at yahoo.com  Mon Mar 19 22:01:15 2007
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 19 Mar 2007 19:01:15 -0700
Subject: an enumerate question
In-Reply-To: <7xr6rkr8gw.fsf@ruckus.brouhaha.com>
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
	<7xr6rkr8gw.fsf@ruckus.brouhaha.com>
Message-ID: <1174356075.710324.321150@b75g2000hsg.googlegroups.com>

On Mar 20, 9:48 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> eight02645... at yahoo.com writes:
> > hi
> > say i want to enumerate lines of a file
> > eg
> > for n,l in enumerate(open("file")):
> >      # print  next line ie
>
> > is there a way to print out the next line from current line using the
> > above?.
>
> I don't understand what you're trying to do.  You mean you're
> trying to print all lines except the first one?

thanks for replying. sorry i make clear again.
say
for n,l in enumerate(open("file")):
   print n,l # this prints current line
   print next line in this current iteration of the loop.
hope you can understand now.
thanks.




From bignose+hates-spam at benfinney.id.au  Tue Mar 20 20:56:29 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 21 Mar 2007 11:56:29 +1100
Subject: Subject line with smtplib.sendmail()
References: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com>
	<etotbk$b1c$1@sea.gmane.org>
	<09042D621CD4AA479C678463F3A646D0E884D5@sottemail1.ent.ad.cognos.com>
	<09042D621CD4AA479C678463F3A646D0E884E5@sottemail1.ent.ad.cognos.com>
	<op.tpift1wix6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <87aby75s8y.fsf@benfinney.id.au>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:

> 	Perhaps you are using an """indented
> 	triple quoted
> 	string""" ?
>
> The indentation goes into the string itself. You may use a global
> (module) constant to hold the string, by example.

Rather than letting technical issues dictate where to place your code,
you can keep the indentation for code readability and remove it when
the data is processed::

    >>> import textwrap
    >>> def get_text():
    ...     raw_text = """\
    ...         Blah blah
    ...         spam eggs spam
    ...         """
    ...     text = textwrap.dedent(raw_text)
    ...     return text
    ...
    >>> foo = get_text()
    >>> print foo
    Blah blah
    spam eggs spam

    >>>

-- 
 \        "Somebody told me how frightening it was how much topsoil we |
  `\   are losing each year, but I told that story around the campfire |
_o__)                          and nobody got scared."  -- Jack Handey |
Ben Finney



From cfbolz at gmx.de  Wed Mar 28 17:24:53 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 23:24:53 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175111519.550674.160720@n59g2000hsh.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175111519.550674.160720@n59g2000hsh.googlegroups.com>
Message-ID: <460ADD25.5050008@gmx.de>

Hi!

dmitrey wrote:
> Hi!
> Suppose I have a py-written module.
> Is it possible somehow run PyPy on the whole module?
> I didn't find it in documentation.
> And if yes (or if just run in every module func) what will be after
> computer restart?
> Should I restart  PyPy on the module once again?
> And are there any chances/intends for  PyPy to be included into Python
> core?

PyPy contains a full Python interpreter (which can include a JIT 
compiler) and thus replaces the "Python core". PyPy can never really be 
integrated into CPython.

Cheers,

Carl Friedrich Bolz


From steve at holdenweb.com  Tue Mar 27 05:14:24 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 27 Mar 2007 05:14:24 -0400
Subject: __init__.py
In-Reply-To: <slrnf0hiab.3nr.grahn+nntp@frailea.sa.invalid>
References: <q8ydnRG5jr36-prbRVnzvA@telenor.com>	<q8ydnRC5jr1a-prbRVnzvA@telenor.com>
	<slrnf0hiab.3nr.grahn+nntp@frailea.sa.invalid>
Message-ID: <euan9j$eu$1@sea.gmane.org>

Jorgen Grahn wrote:
> On Mon, 26 Mar 2007 08:27:19 +0200, Tina I <tinaweb at bestemselv.com> wrote:
>> Tina I wrote:
>>> When looking at other peoples code (to learn from it) I keep seeing an 
>>> empty file named "__init__.py". What's the purpose of this?
>>>
>>> Thanks
>>> Tina
>> Duh! Never mind... found it.
>> Kinda neat actually :)
> 
> /What/ was neat? It's polite in cases like this to explain what the
> answer or solution was.
> 
> I have never seen an empty __init__.py, and I'd like to know what its
> purpose could be.
> 
> BR,
> /Jorgen
> 
The presence of an __init__.py marks a directory as the root of a Python 
package, which means other modules can be found in it. This allows you 
to import names with multiple levels of dots, which are modules within 
packages.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From nobody at invalid.com  Mon Mar 19 12:34:07 2007
From: nobody at invalid.com (Erik Johnson)
Date: Mon, 19 Mar 2007 10:34:07 -0600
Subject: tracking memory usage
Message-ID: <45febb7f$1@nntp.zianet.com>


  Sort of two questions here:

    The first is about the internal view: are there Python introspection
functions that can be called such that a running script can keep tabs on how
much memory is being used?

    And the second is about using either os or system calls on Windows such
that a Python script could get similar information about other processes
(i.e., external)?

Thanks,
-ej




From kbk at shore.net  Sat Mar 17 00:54:46 2007
From: kbk at shore.net (Kurt B. Kaiser)
Date: Fri, 16 Mar 2007 23:54:46 -0500 (EST)
Subject: Weekly Python Patch/Bug Summary
Message-ID: <200703170454.l2H4skKe003172@bayview.thirdcreek.com>

Patch / Bug Summary
___________________

Patches :  342 open (-38) /  3712 closed (+54) /  4054 total (+16)
Bugs    :  951 open (-14) /  6588 closed (+33) /  7539 total (+19)
RFE     :  257 open (-15) /   266 closed (+13) /   523 total ( -2)

New / Reopened Patches
______________________

ftp.python.org does not exist anymore  (2007-03-12)
CLOSED http://python.org/sf/1678662  opened by  Bj?rn Lindqvist

fix a bug mixing up 0.0 and-0.0  (2007-03-11)
       http://python.org/sf/1678668  opened by  Alex Martelli

Allow "datetime in date"  (2007-03-12)
CLOSED http://python.org/sf/1679204  opened by  Collin Winter

Documentation for fnmatch.translate()  (2007-03-12)
CLOSED http://python.org/sf/1679379  opened by  Bj?rn Lindqvist

__slots__ tuple modified inplace if it contains unicode name  (2007-03-13)
CLOSED http://python.org/sf/1680015  opened by  ?iga Seilnacht

CGIHTTPServer doesn't handle path names with embeded space  (2006-08-06)
       http://python.org/sf/1535504  reopened by  htgoebel

Add tests for pipes module (test_pipes)  (2007-03-14)
       http://python.org/sf/1680959  opened by  Alan McIntyre

remove sys.exitfunc, rewrite atexit in C  (2007-03-14)
       http://python.org/sf/1680961  opened by  Georg Brandl

Use "alive" instead of "active" in the docs for threading  (2007-03-14)
CLOSED http://python.org/sf/1680978  opened by  Bj?rn Lindqvist

binary and new-style octal literals  (2007-03-14)
       http://python.org/sf/1681002  opened by  Thomas Wouters

PEP 3115 patch  (2007-03-14)
       http://python.org/sf/1681101  opened by  Guido van Rossum

Patch for [ 1603150 ] wave module forgets to close...  (2007-03-15)
CLOSED http://python.org/sf/1681153  opened by  Patricio Olivares

email.header unicode fix  (2007-03-15)
       http://python.org/sf/1681333  opened by  Tokio Kikuchi

Add triangular distribution to random  (2007-03-15)
       http://python.org/sf/1681432  opened by  Wladmir

splitext of dotfiles, incl backwards compat and migration  (2007-03-16)
       http://python.org/sf/1681842  opened by  Stephen Hansen

Patches Closed
______________

Patch to 742342 Crash on recursive reload  (2004-03-23)
       http://python.org/sf/922167  closed by  collinwinter

add optional CWD argument to os.path.abspath()  (2003-01-30)
       http://python.org/sf/677890  closed by  collinwinter

ftp.python.org does not exist anymore  (2007-03-11)
       http://python.org/sf/1678662  closed by  collinwinter

fix for external test regression in test.regrtest  (2003-09-17)
       http://python.org/sf/808210  closed by  collinwinter

urllib2.URLError don't calll IOError.__init__  (2003-10-02)
       http://python.org/sf/816787  closed by  collinwinter

Refactor test_threadedtempfile.py to use unittest.  (2007-02-28)
       http://python.org/sf/1670993  closed by  collinwinter

urllib2.urlopen() raises OSError instead of URLError  (2007-02-24)
       http://python.org/sf/1668100  closed by  gbrandl

site.py small ?bug fix | change?  (2007-03-10)
       http://python.org/sf/1677862  closed by  loewis

adding __dir__  (2006-11-06)
       http://python.org/sf/1591665  closed by  gbrandl

Refactor test_operations.py to use unittest.  (2007-03-10)
       http://python.org/sf/1678088  closed by  collinwinter

Add current dir when running try_run test program  (2005-03-21)
       http://python.org/sf/1168055  closed by  collinwinter

Allow "datetime in date"  (2007-03-12)
       http://python.org/sf/1679204  closed by  collinwinter

Documentation for fnmatch.translate()  (2007-03-12)
       http://python.org/sf/1679379  closed by  gbrandl

comments to clarify complexobject.c  (2007-01-23)
       http://python.org/sf/1642844  closed by  gbrandl

Fix for bugs relating to ntpath.expanduser()  (2004-05-20)
       http://python.org/sf/957650  closed by  gbrandl

Add %var% support to ntpath.expandvars  (2006-10-10)
       http://python.org/sf/1574252  closed by  gbrandl

CSV DictWriter Errors  (2007-01-15)
       http://python.org/sf/1635454  closed by  gbrandl

test_cmd_line fails on Windows  (2006-09-15)
       http://python.org/sf/1559413  closed by  loewis

Performance enhancements.  (2006-09-09)
       http://python.org/sf/1555098  closed by  gbrandl

Tweak pydoc to speak about with and CONTEXTMANAGERS  (2006-08-18)
       http://python.org/sf/1542681  closed by  gbrandl

Fix building the source within exec_prefix  (2006-10-03)
       http://python.org/sf/1569798  closed by  gbrandl

email.message.py charset can be unicode instance  (2006-03-14)
       http://python.org/sf/1449244  closed by  loewis

Allow __class __ assignment for classes with __slots__  (2006-12-28)
       http://python.org/sf/1623563  closed by  zseil

__slots__ tuple modified inplace if it contains unicode name  (2007-03-13)
       http://python.org/sf/1680015  closed by  zseil

ConfigParser does not quote %  (2007-01-15)
       http://python.org/sf/1635639  closed by  gbrandl

Allow textwrap to preserve leading and trailing whitespace  (2006-10-20)
       http://python.org/sf/1581073  closed by  gbrandl

posix.readlink doesn't use filesystemencoding  (2006-10-19)
       http://python.org/sf/1580674  closed by  gbrandl

Make Imap Error more helpful  (2006-11-29)
       http://python.org/sf/1605192  closed by  gbrandl

option to leave tempfile.NamedTemporaryFile around on close  (2006-08-10)
       http://python.org/sf/1537850  closed by  gbrandl

Let timeit accept functions  (2006-08-03)
       http://python.org/sf/1533909  closed by  gbrandl

pydoc render_doc  (2006-07-28)
       http://python.org/sf/1530482  closed by  gbrandl

Switch syntax (partial PEP 275)  (2006-06-11)
       http://python.org/sf/1504199  closed by  gbrandl

Patch for bug #931877  Segfault in object_reduce_ex  (2006-04-01)
       http://python.org/sf/1462488  closed by  zseil

Remove sys.exitfunc  (2006-07-03)
       http://python.org/sf/1516375  closed by  gbrandl

Patch to commands.py to enable callback support   (2006-07-05)
       http://python.org/sf/1517586  closed by  gbrandl

Remove deprecated functions from operator  (2006-07-03)
       http://python.org/sf/1516309  closed by  collinwinter

Adding support for _Bool to ctypes as c_bool  (2007-01-31)
       http://python.org/sf/1649190  closed by  theller

kwdargs for compile/__import__  (2006-03-07)
       http://python.org/sf/1444529  closed by  gbrandl

Add restart debugger command to pdb.py  (2005-12-30)
       http://python.org/sf/1393667  closed by  gbrandl

httplib error handling and HTTP/0.9 fix  (2005-10-04)
       http://python.org/sf/1312980  closed by  gbrandl

assert for NULL in Py_INCREF Py_DECREF  (2006-07-06)
       http://python.org/sf/1517947  closed by  gbrandl

pdb: fix for  1326406 (import  __main__ pdb failure)  (2006-02-11)
       http://python.org/sf/1429539  closed by  gbrandl

pydoc requires o.__nonzero__() == True  (2005-05-03)
       http://python.org/sf/1194449  closed by  gbrandl

binascii.b2a_qp does not handle binary data correctly  (2005-04-18)
       http://python.org/sf/1185447  closed by  gbrandl

Fix for 767111, 'AttributeError thrown by urllib.open_http'  (2007-02-25)
       http://python.org/sf/1668132  closed by  gbrandl

Use "alive" instead of "active" in the docs for threading  (2007-03-14)
       http://python.org/sf/1680978  closed by  gbrandl

Patch for [ 1603150 ] wave module forgets to close...  (2007-03-15)
       http://python.org/sf/1681153  closed by  gbrandl

Add Thread.isActive()  (2005-01-23)
       http://python.org/sf/1107656  closed by  gbrandl

Refactor test_popen2.py to use unittest.  (2007-03-09)
       http://python.org/sf/1676994  closed by  collinwinter

debugger ``condition`` and ``ignore`` exception handling  (2005-04-29)
       http://python.org/sf/1192590  closed by  collinwinter

new function: os.path.relpath  (2005-10-27)
       http://python.org/sf/1339796  closed by  collinwinter

Fix error/crash in AST: syntaxerror in complex ifs  (2007-01-23)
       http://python.org/sf/1642547  closed by  collinwinter

release lock on exception in threading.Thread.join()  (2005-07-18)
       http://python.org/sf/1240614  closed by  nnorwitz

extending os.walk to support following symlinks  (2005-08-26)
       http://python.org/sf/1273829  closed by  gbrandl

New / Reopened Bugs
___________________

Lots of errors reported by valgrind in 2.4.4 and 2.5  (2007-01-05)
CLOSED http://python.org/sf/1629158  opened by  Anton Tropashko

dead link in tkinter documentation  (2007-03-11)
       http://python.org/sf/1678710  opened by  Ben Collver

Lib/io.py open uses unset "bs"  (2007-03-12)
       http://python.org/sf/1679498  opened by  Jim Jewett

error in the sys module documentation  (2007-03-13)
CLOSED http://python.org/sf/1679652  opened by  David Fillinger

"my" should be "may"  (2007-03-13)
CLOSED http://python.org/sf/1679784  opened by  edward

Importing SystemRandom wastes entropy.  (2007-03-13)
CLOSED http://python.org/sf/1680034  reopened by  stephent98

Importing SystemRandom wastes entropy.  (2007-03-13)
CLOSED http://python.org/sf/1680034  opened by  Steve Tyler

Misleading exception from unicode.__contains__  (2007-03-13)
       http://python.org/sf/1680159  opened by  Jan Hudec

urllib.urlopen() raises AttributeError  (2007-03-14)
CLOSED http://python.org/sf/1680230  opened by  Bj?rn Lindqvist

httplib fails to parse response on HEAD request  (2007-03-13)
CLOSED http://python.org/sf/1680312  opened by  Patrick Altman

execfile locks file forever if there are any syntax errors  (2007-03-14)
CLOSED http://python.org/sf/1681020  opened by  virwen

webbrowser priorities  (2007-03-15)
CLOSED http://python.org/sf/1681228  opened by  Lukas Lalinsky

WindowsError in webbrowser.open  (2007-03-15)
CLOSED http://python.org/sf/1681248  opened by  Lukas Lalinsky

Python and Indeterminate Forms (Math)  (2007-03-15)
       http://python.org/sf/1681671  opened by  jehahn

subprocess.Popen fails with socket._fileobject on Windows  (2007-03-15)
       http://python.org/sf/1681674  opened by  Hartmut Goebel

too long string causes segmentation fault  (2007-03-16)
       http://python.org/sf/1681762  opened by  L

mkdtemp fails on Windows if username has non-ASCII character  (2007-03-16)
       http://python.org/sf/1681974  opened by  Markus Niemist?

unittest documentation is incomplete  (2007-03-16)
       http://python.org/sf/1681984  opened by  STINNER Victor

[PATCH] TypeError swallowing in UNPACK_SEQUENCE opcode  (2007-03-16)
       http://python.org/sf/1682205  opened by  Piet Delport

Problems with urllib2 read()  (2007-03-16)
       http://python.org/sf/1682241  opened by  Lucas Malor

docutils clarification request for "rest"  (2007-03-16)
       http://python.org/sf/1682403  opened by  j vickroy

Bugs Closed
___________

Lots of errors reported by valgrind in 2.4.4 and 2.5  (2007-01-06)
       http://python.org/sf/1629158  closed by  loewis

absolute import patch breaks external users of test.regrtest  (2003-08-31)
       http://python.org/sf/798274  closed by  collinwinter

email._parseaddr AddrlistClass bug  (2007-01-06)
       http://python.org/sf/1629369  closed by  bwarsaw

Weird behavior Exception with unicode string  (2007-03-12)
       http://python.org/sf/1678647  closed by  gbrandl

Python still uses broken -xcode option on Solaris/x86  (2007-03-07)
       http://python.org/sf/1675511  closed by  loewis

Python crashes if recursively reloading modules  (2003-05-23)
       http://python.org/sf/742342  closed by  collinwinter

inspect trouble when source file changes  (2007-01-05)
       http://python.org/sf/1628987  closed by  collinwinter

fnmatch.translate undocumented  (2007-01-08)
       http://python.org/sf/1630844  closed by  gbrandl

Install fails with no error  (2007-02-24)
       http://python.org/sf/1667877  closed by  sf-robot

Urllib2.urlopen() raises OSError w/bad HTTP Location header  (2006-11-07)
       http://python.org/sf/1591774  closed by  gbrandl

error in the sys module documentation  (2007-03-13)
       http://python.org/sf/1679652  closed by  gbrandl

Exception when compressing certain data with bz2  (2006-12-27)
       http://python.org/sf/1622896  closed by  gbrandl

"my" should be "may"  (2007-03-13)
       http://python.org/sf/1679784  closed by  gbrandl

Importing SystemRandom wastes entropy.  (2007-03-13)
       http://python.org/sf/1680034  closed by  rhettinger

Importing SystemRandom wastes entropy.  (2007-03-13)
       http://python.org/sf/1680034  closed by  gbrandl

typo in encoding name in email package  (2006-09-12)
       http://python.org/sf/1556895  closed by  bwarsaw

pdb breaks programs which import from __main__  (2005-10-14)
       http://python.org/sf/1326406  closed by  gbrandl

ntpath.expanduser() is still wrong  (2003-08-27)
       http://python.org/sf/796219  closed by  gbrandl

binascii.b2a_qp oddities  (2004-12-14)
       http://python.org/sf/1085283  closed by  gbrandl

urllib.urlopen() raises AttributeError  (2007-03-13)
       http://python.org/sf/1680230  closed by  gbrandl

httplib fails to parse response on HEAD request  (2007-03-14)
       http://python.org/sf/1680312  closed by  gbrandl

email.header decode within word  (2006-10-22)
       http://python.org/sf/1582282  closed by  bwarsaw

AttributeError thrown by urllib.open_http  (2003-07-07)
       http://python.org/sf/767111  closed by  gbrandl

urllib.py: AttributeError on BadStatusLine  (2006-02-11)
       http://python.org/sf/1429783  closed by  gbrandl

poor urllib error handling  (2006-11-09)
       http://python.org/sf/1593751  closed by  gbrandl

urllib does not handle Connection reset  (2003-12-07)
       http://python.org/sf/855819  closed by  gbrandl

commands module doesn't support background commands  (2004-02-06)
       http://python.org/sf/891832  closed by  gbrandl

commands.getstatusoutput(): cmd.exe support  (2002-01-20)
       http://python.org/sf/506100  closed by  gbrandl

Installation path sent to configure  (2005-05-08)
       http://python.org/sf/1197883  closed by  gbrandl

execfile locks file forever if there are any syntax errors  (2007-03-14)
       http://python.org/sf/1681020  closed by  gbrandl

wave module forgets to close file on exception  (2006-11-26)
       http://python.org/sf/1603150  closed by  gbrandl

webbrowser priorities  (2007-03-15)
       http://python.org/sf/1681228  closed by  gbrandl

WindowsError in webbrowser.open  (2007-03-15)
       http://python.org/sf/1681248  closed by  gbrandl

Segfault in object_reduce_ex  (2004-04-08)
       http://python.org/sf/931877  closed by  zseil

Documentation missing for OptionGroup class in optparse   (2007-02-21)
       http://python.org/sf/1665333  closed by  nnorwitz

New / Reopened RFE
__________________

optparse should support arbitrary number of arguments  (2006-07-24)
CLOSED http://python.org/sf/1527705  reopened by  riteshsarraf

RFE Closed
__________

csv.DictWriter: Include offending name in error message  (2007-01-13)
       http://python.org/sf/1634717  closed by  gbrandl

Update to the BEGIN_ALLOW_THREADS macros  (2001-07-23)
       http://python.org/sf/443775  closed by  nnorwitz

moving the Mac/ src dir to a diff packag  (2001-09-24)
       http://python.org/sf/464605  closed by  nnorwitz

assert return values  (2002-07-24)
       http://python.org/sf/585915  closed by  nnorwitz

Including python-codecs codecs in standard distribution?  (2003-03-20)
       http://python.org/sf/706970  closed by  nnorwitz

optparse help text is not easily extensible  (2004-01-16)
       http://python.org/sf/878458  closed by  nnorwitz

dir(mod) OK or use vars(mod).keys()?  (2004-03-29)
       http://python.org/sf/925537  closed by  gbrandl

Allow any lvalue for function definitions  (2004-05-08)
       http://python.org/sf/950644  closed by  gvanrossum

Extension to optparse: options with optional arguments  (2004-11-25)
       http://python.org/sf/1073198  closed by  nnorwitz

Bad optparse help wrapping with multiple paragraphs  (2005-06-16)
       http://python.org/sf/1222235  closed by  nnorwitz

python executable optionally should search script on PATH  (2005-12-13)
       http://python.org/sf/1379573  closed by  loewis

optparse should support arbitrary number of arguments  (2006-07-24)
       http://python.org/sf/1527705  closed by  nnorwitz

optparse "store" action should not gobble up next  option  (2007-01-03)
       http://python.org/sf/1627266  closed by  nnorwitz

isinstance.__doc__ is somewhat irritating  (2007-02-27)
       http://python.org/sf/1670167  closed by  gbrandl



From bugbear at trim_papermule.co.uk_trim  Fri Mar 30 04:28:36 2007
From: bugbear at trim_papermule.co.uk_trim (bugbear)
Date: Fri, 30 Mar 2007 09:28:36 +0100
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
Message-ID: <460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>

Xah Lee wrote:

> So, a simple code like this in normal languages:
> 
> a = "a string";
> b = "another one";
> c = join(a,b);
> print c;
> 
> or in lisp style
> 
> (set a "a string")
> (set b "another one")
> (set c (join a b))
> (print c)
> 
> becomes in Java:
> 
> public class test {
>   public static void main(String[] args) {
>     String a = new String("a string");
>     String b = new String("another one");
>     StringBuffer c = new StringBuffer(40);
>     c.append(a); c.append(b);
>     System.out.println(c.toString());
>     }
> }

Er. How about

public class test {
   public static void main(String[] args) {
     String a = "a string";
     String b = "another one";
     StringBuffer c = a + b;
     System.out.println(c);
     }
}

Alternatively I could recode your Lisp example
as badly as you coded your Java.

   BugBear


From lobais at gmail.com  Fri Mar  2 20:35:22 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 02:35:22 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<7xlkifh1lw.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.23.08.35@gmail.com>
	<7xr6s79msy.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.03.01.35.33@gmail.com>

Den Fri, 02 Mar 2007 16:46:05 -0800 skrev Paul Rubin:

> Thomas Dybdahl Ahle <lobais at gmail.com> writes:
>> Do you mean that I add my moves something like this?
>> 
>> from heapq import heappush, heappop
>> heap = []
>> for move in genAll():
>>     heappush(heap, (-getMoveValue (board, table, ply, move), move))
>> 
>> And then use heappop(heap) in the alphabeta loop?
> 
> Yes, something like that.  If you want to get, say, the five smallest
> values in a list, heapq lets you do that without having to sort the
> whole list.

Yeah, I use this now. The only think I don't really like, is the need of 
creating a ton of tupples, but it doesn't show me too much it seams.


From fakeaddress at nowhere.org  Thu Mar  8 04:48:02 2007
From: fakeaddress at nowhere.org (Bryan Olson)
Date: Thu, 08 Mar 2007 09:48:02 GMT
Subject: multithreading concept
In-Reply-To: <1170865166.423764.87050@s48g2000cws.googlegroups.com>
References: <mailman.3639.1170813233.32031.python-list@python.org>
	<1170865166.423764.87050@s48g2000cws.googlegroups.com>
Message-ID: <mZQHh.5714$M65.716@newssvr21.news.prodigy.net>

sturlamolden wrote:
[...]
> If you want to utilize the computing power of multiple CPUs, you
> should use multiple processes instead of threads. On Python this is
> mandatory due to the GIL. In any other language it it highly
> recommended. The de-factor standard for parallel multiprocessing (MPI)
> uses multiple processes, even on SMPs.

That doesn't really work in Python. There have been projects to
allow Pythonic coordination of processes -- POSH had some good
ideas -- but none have reached fruition.

There's nothing like a close thing to a good defacto standard in
the area. Microsoft's Win32 threads can claim to get as close as
anything.


-- 
--Bryan




From graemeglass at gmail.com  Fri Mar 23 09:09:48 2007
From: graemeglass at gmail.com (Graeme Glass)
Date: 23 Mar 2007 06:09:48 -0700
Subject: Need help to learn Python
In-Reply-To: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
References: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
Message-ID: <1174655388.213799.194450@n59g2000hsh.googlegroups.com>

Online Docs, and Core Python Programming fits the bill! (http://
starship.python.net/crew/wesc/cpp/)



From duncan.booth at invalid.invalid  Fri Mar  9 03:52:35 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 9 Mar 2007 08:52:35 GMT
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>
	<mailman.4834.1173407718.32031.python-list@python.org>
Message-ID: <Xns98EE5A4ADA267duncanbooth@127.0.0.1>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> Not the *previous* exception, but the *current* one. You must be
> inside an  "except" clause to use a bare raise.
> 
No, you don't have to be inside an except clause to use a bare raise.

A bare 'raise' will re-raise the last exception that was active in the 
current scope. That applies even outside the except clauses just so long 
as there has been an exception within the same function:

e.g.

def retry(fn, *args):
    for attempt in range(3):
        try:
            return fn(*args)
        except:
            print "retrying attempt", attempt+1
    # If we get here we've had too many retries
    raise

>>> import random
>>> def testfn():
	if random.randint(0,3):
		raise RuntimeError("oops")
	return 42

>>> retry(testfn)
retrying attempt 1
retrying attempt 2
retrying attempt 3

Traceback (most recent call last):
  File "<pyshell#24>", line 1, in <module>
    retry(testfn)
  File "<pyshell#20>", line 4, in retry
    return fn(*args)
  File "<pyshell#23>", line 3, in testfn
    raise RuntimeError("oops")
RuntimeError: oops
>>> retry(testfn)
retrying attempt 1
retrying attempt 2
42
>>> retry(testfn)
42


From fleitner at REMcnioOVE.es  Thu Mar 29 06:14:26 2007
From: fleitner at REMcnioOVE.es (Florian Leitner)
Date: Thu, 29 Mar 2007 12:14:26 +0200
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
	<1175154020.467194.40000@b75g2000hsg.googlegroups.com>
	<1hvpoqf.1jl697wvbomidN%aleax@mac.com>
Message-ID: <eug3i3$ob8$1@aioe.org>

* Alex Martelli wrote, On 3/29/07 9:46 AM:
> <s99999999s2003 at yahoo.com> wrote:
>> another query, in the docs, list(a) and a[:] does the same thing (a =
>> [1,2,3] for example), but besides the speed of slicing is faster than
>> list(), what advantage is there for using list(a) in this case ?
> 
> Readability (a word is more readable than idiomatic punctuation), and
> conceptual uniformity with making shallow copies of other containers of
> known types such as sets and dicts.

I just want to summarizes what Alex is saying (correct me if I'm 
wrong!): usually, you do not want to use copy.copy, and copy.deepcopy 
only when you really need it (which is, if I search for it in my 
library, very seldom). As to whether use list(lst), [x for x in lst], 
list(x for x in lst), or just lst[:], I'd summarize it to this:

list(lst):
most expressive; use if you want to explicitly create a copy of a list 
and only a list or if you want to ensure that whatever sequence you 
received gets transformed to a list.

[list comprehension] and gen(erators):
usually to create a copy of a list, generator function or sequence with 
some modification; using list comprehension always creates list, with a 
generator setup you could do (for example):
tup = tuple(x + 1 for x in int_lst)
Some people also argue generators are faster, but I'd advise you to use 
what is more understandable first - you are asking what methods are 
faster, but keep in mind: "premature [code] optimization is the root of 
all evil", or so... (from T. Hoare/D. Knuth). And believe me, this 
statement holds always, as I had to learn the bloody hard way!

using slices[:]:
preserves the sequence you are using, so you could create a function 
that accepts list, tuples, strings or any other sequence as input and 
makes a copy of the sequence regardless of its type and returns that 
type. A very nice example of this is can be found in the 
Permutations/Combinations/Selections recipe from the Python Cookbook (R 
19.15):

def _combinators(_handle, items, n):
     # factored-out common structure for:
     # combinations, selections and permutations
     if n == 0:
         yield items[:0]
         return
     for i in range(len(items)):
         this_one = items[i:i + 1]
         for cc in _combinators(_handle, _handle(items, i), n - 1):
             yield this_one + cc

def combinations(items, n):
     """ take n distinct items, order matters """
     def skipIthItem(items, i):
         return items[:i] + items[i+1:]
     return _combinators(skipIthItem, items, n)

def uniqueCombinations(items, n):
     """ take n distinct items, order is irrelevant """
     def afterIthItem(items, i):
         return items[i+1:]
     return _combinators(afterIthItem, items, n)

def selections(items, n):
     """ take n (not necessarily distinct) items, order matters """
     def keepAllItems(items, i):
         return items
     return _combinators(keepAllItems, items, n)

def permutations(items):
     """ take all items, order matters """
     return combinations(items, len(items))

Because _combinators() returns "yield items[:0]" (i.e. the empty input 
sequence) instead of, say, an empty list ("yield list()"), and because 
the assignment to this_one in _combinators() is not "this_one = 
[items[i]]", but "this_one = items[i:i+1]", you can use any sequence as 
input to these functions, not just lists. Yet, it arguably might not be 
the most efficient solution because of the recurring sequence 
concatenations in the inner functions and the yield statement...

-Florian


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 13 04:40:43 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 09:40:43 +0100
Subject: Starting Python... some questions
In-Reply-To: <pan.2007.03.13.05.12.10.593926@REMOVEME.cybersource.com.au>
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
	<pan.2007.03.13.05.12.10.593926@REMOVEME.cybersource.com.au>
Message-ID: <45f66381$0$15552$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Mon, 12 Mar 2007 21:39:11 -0700, jezonthenet wrote:
> 
>> I started using Python a couple of days ago - here are a few
>> questions:
>>
>> * Doesn't the __main__() method automatically execute when I run my
>> python program?
> 
> 
> No. 
> 
> 
>> * Only when I do an import of my test.py file within python and then
>> run test.__main__() I can see where my bugs are. Is this correct?
>> (right now this is my only way of running my python program and see
>> where I have problems)
> 
> That's a good way of choosing to run __main__ manually, but there are
> other ways.
> 
> If you add a line to the end of your program:
> 
> __main__()
> 
> 
> the function will be executed whenever the program runs. That is both when
> you import it, and when you run it from the command line.
> 
> To ensure it doesn't run when you import, do this:
> 
> 
> if __name__ == "__main__":
>     __main__()
> 
> 
> 
>> * Once I've done an import and then I wish to make a change to the
>> file I've imported I have to quit Python, restart and import that
>> module again in order for the module to be refreshed. Is there no "re-
>> import" ?
> 
> Yes there is. Do this:
> 
> import my_module
> # do things
> # edit the file
> # don't forget to save changes (that always catches me out)
> reload(my_module)
> 
> 
>> * Finally, could someone tell me why I'm having problems with the
>> small module below?
>>   - Python pretends I provide chassis_id() with three parameters, even
>> though I clearly only provide it with two - why?
>>
>> Thanks!
>>
>> #!/usr/bin/python
>> import scapy
>> import struct
>>
>> class lldp_class:
>> 	def __init__(self):
>> 		self.chassis_id_tlv = None
>>
>> 	def chassis_id(subtype, chassis_info):
>> 		if subtype == 4:
>> 			chassis_data = struct.pack("!B",chassis_info)
>> 		subtype_data = struct.pack("!B",subtype)
>> 		self.chassis_id_tlv = subtype_data + chassis_data
> 
> Class methods

s/Class/Instance/

classmethods are methods that takes the class as first parameter.

> always take a first parameter that points to the
> class instance. 

(snip)

> Just remember to always put "self" as the first argument to a class
> method, 

idem.


From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 07:52:50 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 21:52:50 +1000
Subject: Class factory functions
References: <pan.2007.03.25.09.51.37.438285@REMOVE.THIS.cybersource.com.au>
	<eu5guv$qc4$01$1@news.t-online.com>
Message-ID: <pan.2007.03.25.11.52.50.661976@REMOVE.THIS.cybersource.com.au>

On Sun, 25 Mar 2007 11:58:00 +0200, Peter Otten wrote:

>> But it doesn't work:
>> 
>>>>> vint = verbosify_nclass(int)
>>>>> vint(42)
>> Calling constructor __new__ ...
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "<stdin>", line 6, in __new__
>> TypeError: object.__new__(VClass) is not safe, use int.__new__()
>> 
>> 
>> What am I doing wrong?
> 
> Why would you skip VClass in the super() calls?


That's a good question. If I every get a good answer, I'll let you know.

> This should work:
[snip]

As indeed it seems like it does.

Thank you,



-- 
Steven.



From carl.douglas at gmail.com  Wed Mar 21 01:49:34 2007
From: carl.douglas at gmail.com (Carl Douglas)
Date: Wed, 21 Mar 2007 16:49:34 +1100
Subject: [Swig-user] How to receive a FILE* from Python under MinGW?
In-Reply-To: <4600AA7B.1080605@student.unsw.edu.au>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
Message-ID: <6f7c837c0703202249q7ec8da71h374437d6c2bb3af5@mail.gmail.com>

Hi John,

In my case, all I needed was a PyFile_AsFile to get the File *.
However I found that Python errors going to stdout/stderr were not
being redirected properly when my code was linking to a different
version of the CRT than the build of Python I was using.

In the end, I came up with one of two solutions, and I really don't
like recommending either:

1) Rebuild Python with a different compiler/linker kit so it links to
the same CRT as my project, in your case find a mingw built Python.dll

2) Rebuild my project so it links to the same CRT as the Python.dll,
have you got 3 hours to spare, then read on...

Python2.5 out of the msi links against msvcrt71.dll, and I found the
free VS2003 toolkit compiler which produces binaries that link against
this CRT (microsoft no longer provide this because its been superceded
by the VS2005 express editions) archived here:

http://xona.com/2004/06/29.html

Also you will need to download .Net 1.1 (~120mb) to get msvcrt71.lib

More complete details about setting up the free VS2003 command line
compiler are here...

http://root.cern.ch/root/Procedure/Procedure%20to%20install%20the%20free%20Microsoft%20Visual%20C.htm


On 3/21/07, John Pye <john.pye at student.unsw.edu.au> wrote:
> Hi Carl
>
> I'm not sure that your snippet really solves my problem. As far as I can
> see from, you're just passing a filename instead of a file pointer,
> right? And then you're using the Python fopen-equivalent
> (PyFile_FromString) This is not an option for me, as I want to pass the
> FILE* from Python and all the way into into a existing shared-library
> code. I can't change the latter; it must work ok with standard fprintf
> (etc) functions.
>
> If I've missed something, perhaps you could clarify a little bit more on
> how it is that you're overcoming the FILE* problem?
>
> Cheers
> JP
>
> See also
> http://groups.google.com/group/comp.lang.python/browse_frm/thread/7b69b34240169f7e/ac8fae1b61832f51?lnk=st&q=file+mingw+python&rnum=30#ac8fae1b61832f51
>
> And
> http://mail.python.org/pipermail/python-list/2007-March/430695.html
> http://groups.google.com/group/comp.lang.python/browse_frm/thread/6d7569e7fd996daf/
> http://groups.google.com/group/comp.lang.python/browse_frm/thread/17558adbc053f26d/
>
> Carl Douglas wrote:
> > Hi John,
> >
> > I had exactly this problem... use the PyFile_AsFile function.  Below
> > is a code snippet from my project:
> >
> >         // Thank you:  http://www.ragestorm.net/tutorial?id=21#8
> >         PyObject* PyFileObject = PyFile_FromString(ofn.lpstrFile, "r");
> >
> >         if (PyFileObject == NULL)
> >         {
> >             PyErr_Print();
> >             PyErr_Clear();
> >             return false;
> >         }
> >
> >         // Because microsoft C runtimes are not binary compatible, we
> > can't
> >         // just call fopen to get a FILE * and pass that FILE * to
> > another application
> >         // or library (Python25.dll in this case) that uses a
> > different version
> >         // of the C runtime that this DLL uses. Using PyFile_AsFile is a
> > work-around...
> >
> >         if (PyRun_SimpleFile(PyFile_AsFile(PyFileObject),
> > ofn.lpstrFile) == -1)
> >         {
> >             PyErr_Print();
> >             PyErr_Clear();
> >         }
> >
> >         Py_DECREF(PyFileObject);
> >
> > For the full source of my SWIG/Python project, poke around here:
> >
> > http://l3dtpython.googlecode.com/svn/trunk/cdPython/
> >
> > Hope that helps.
> >
> > On 3/21/07, John Pye <john.pye at student.unsw.edu.au> wrote:
> >> Hi all
> >>
> >> There is fairly well-known problem on MinGW with passing FILE pointers
> >> to Python. The problem seems to be that Python depends on a different
> >> version of msvcrt*.dll to that which MinGW depends on, and these
> >> different C runtimes provide different FILE implementations.
> >>
> >> The upshot of that seems to be that file objects created in Python via
> >> the 'file(...)' command can't safely be used in a SWIG module. It can be
> >> done perfectly (using SWIG typemap and PyFile_AsFile) on Linux but it
> >> fails with a segfault on Windows.
> >>
> >> What is the best possible workaround for this? Surely someone must have
> >> found a satisfactory solution to this problem?
> >>
> >> Cheeers
> >> JP
>
> --
> John Pye
> Department of Mechanical and Manufacturing Engineering
> University of New South Wales, Sydney, Australia
> http://pye.dyndns.org/
>
>


From gnewsg at gmail.com  Tue Mar 20 08:48:12 2007
From: gnewsg at gmail.com (billiejoex)
Date: 20 Mar 2007 05:48:12 -0700
Subject: How many connections can accept a 'binded' socket?
Message-ID: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>

Hi,
I'm writing a small asyncore-based server application serving a lot of
clients. When I have to handle more than 1021 client simoultaneously
the 'binded' socket object raises an error:

[...]
connections: 1018
connections: 1019
connections: 1020
connections: 1021
Traceback (most recent call last):
  File "asyncore_client.py", line 31, in <module>
  File "asyncore.py", line 191, in loop
  File "asyncore.py", line 138, in poll
  File "asyncore.py", line 80, in write
  File "asyncore.py", line 76, in write
  File "asyncore.py", line 395, in handle_write_event
  File "asyncore_client.py", line 24, in handle_connect
  File "asyncore_client.py", line 9, in __init__
  File "asyncore.py", line 257, in create_socket
  File "socket.py", line 156, in __init__
socket.error: (24, 'Too many open files')

I just wanna know: is there a way to know how many connections can
accept a 'binded' socket BEFORE getting such error? Maybe
socket.SOMAXCONN could help me?

Thanks in advance.



From mail at microcorp.co.za  Wed Mar 14 03:44:03 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 14 Mar 2007 09:44:03 +0200
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au><55fbgjF2492skU1@mid.individual.net><1173573654.009953.266280@30g2000cwc.googlegroups.com><7xbqj01u9c.fsf@ruckus.brouhaha.com><slrnevae8j.dr9.nick@irishsea.home.craig-wood.com><mailman.5007.1173770416.32031.python-list@python.org>
	<pan.2007.03.14.01.29.47.73249@REMOVEME.cybersource.com.au>
Message-ID: <020801c7660c$b3d88260$03000080@hendrik>

"Steven D'Aprano" <steve at REMOVEME.cy....source.com.au> wrote:

> Easy-peasey. Just collate the individual numbers from the lists, and graph
> their frequencies. You will get quite different distributions. Both are
> "random", but in different ways.
> 
8< ------------ code -----------------

Thanks - I think too complex - was thinking about means and std devs and stuff
for each column, and chi squared tests of significance...

: - )

- Hendrik






From eddie at holyrood.ed.ac.uk  Thu Mar 22 12:10:13 2007
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Thu, 22 Mar 2007 16:10:13 +0000 (UTC)
Subject: flattening/rolling up/aggregating a large sorted text file
References: <1174479568.427193.132740@n59g2000hsh.googlegroups.com>
Message-ID: <etu9p5$3ad$1@scotsman.ed.ac.uk>

adtvff at yahoo.com writes:

>Hi,

>Given a large ascii file (delimited or fixed width) with one ID field
>and dimensions/measures fields, sorted by dimensions, I'd like to
>"flatten" or "rollup" the file by creating new columns: one for each
>combination of dimension level, and summing up measures over all
>records for a given ID.

>If the wheel has already been invented, great, please point me in the
>right direction. If not, please share some pointers on how to think
>about this problem in order to write efficient code.

>Is a hash with dimension level combinations a good approach, with
>values reset at each new ID level?

>I know mysql, Oracle etc will do this , but they all have a cap on #
>of columns allowed. SAS will allow unlimited columns, but I don't own
>SAS.

>Thanks.


>ID,color,shape,msr1
>------------------------------
>001, blue, square,  4
>001, red , circle,    5
>001, red,  circle,    6


>ID, blue_circle, blue_square, red_circle, red_square
>--------------------------------------------------------------------------
>001,0,4,11,0
>002 ...

Something like:

import sys
from sets import Set

ids  = {}
keys = Set()

for line in sys.stdin:
    ID,COL,SHAPE,VAL = [s.strip() for s in line.split(',')]
    ids.setdefault(ID,{})
    key = '%s_%s'%(COL,SHAPE)
    ids[ID].setdefault(key,0)
    ids[ID][key] += int(VAL)
    keys.add(key)

print 'id',',',','.join([str(key) for key in keys])
for id,cols in ids.items():
    print id,',', ', '.join([str(cols.get(k,0)) for k in keys])


Doesn't keep all possible keys just those that are actually used.
Needs to sort() things here and there.

Incidentally I don't think you could do it in SQL at all in this way but you
could do it in a more vertical fashion (eg
001, red, circle, 11
001, blue, square, 4
002, red, rhombus, 99) etc.

Eddie


From cptnwillard at gmail.com  Fri Mar  9 07:35:50 2007
From: cptnwillard at gmail.com (cptnwillard at gmail.com)
Date: 9 Mar 2007 04:35:50 -0800
Subject: C++ and Python
In-Reply-To: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
Message-ID: <1173443750.447009.88370@t69g2000cwt.googlegroups.com>

On Mar 9, 7:04 am, "bress... at gmail.com" <bress... at gmail.com> wrote:
> Hi Everyone,
>
> I'm considering about generating some Python Bindings for C++
> libraries. What are considered the best tools for doing something like
> this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.
>
> Thanks!

Declare the functions you want to use in Python with 'extern "C"', and
make them available in a dynamic library. Then use ctypes to call them
directly.

Regards,

Willard



From bgm.com at gmail.com  Fri Mar 16 15:56:02 2007
From: bgm.com at gmail.com (Brian G. Merrell)
Date: Fri, 16 Mar 2007 13:56:02 -0600
Subject: socket.error: (9, 'Bad file descriptor') Python 2.5
Message-ID: <2c46bb8c0703161256i763c4f51s4c23c9d70715b027@mail.gmail.com>

I'm getting the following trace in python 2.5:

Traceback (most recent call last):
  File "./template_unittest.py", line 36, in <module>
    zencc.start_browser(machines.zones[0].devices.get_primary_servers()[0])
  File "/home/bean/code/automation/nrm-qa/trunk/brimstone/lib/zcc.py", line
221, in start_browser
    self.t.StartWebBrowser(url)
  File "/home/bean/code/automation/tomato/Tomato/selenium.py", line 140, in
StartWebBrowser
    res = self.sendcommand('open', url)
  File "/home/bean/code/automation/tomato/Tomato/selenium.py", line 64, in
_sendcommand
    return self.gateway.execute(selcmd, str(seltarget), str(selvalue))
  File "/home/bean/code/automation/tomato/Tomato/SeleniumGateway.py", line
137, in execute
    self.send_string(self.buildselenese(selcmd, seltarget, selvalue))
  File "/home/bean/code/automation/tomato/Tomato/SeleniumGateway.py", line
161, in send_string
    self.waiting_client.write(command)
  File "/usr/lib/python2.5/socket.py", line 261, in write
  File "/usr/lib/python2.5/socket.py", line 248, in flush
socket.error: (9, 'Bad file descriptor')

However, I do not have any problems when using Python 2.4.  In fact, I can
replace the socket.py library from 2.5 with the socket.py from 2.4 and it
fixes this problem.  I ran a diff on the two different sockey.py versions,
and there are some differences but I couldn't see anything obvious that
would cause this.

Any ideas?  I can post more code if necessary.

Also, here are the versions I'm using:

Python 2.5 (r25:51908, Jan  9 2007, 16:59:32)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2

Python 2.4.4 (#1, Mar 15 2007, 23:58:13)
[GCC 4.1.2 20061115 (prerelease) (SUSE Linux)] on linux2

Thanks,
Brian
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From nagle at animats.com  Fri Mar 16 12:01:32 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 16 Mar 2007 16:01:32 GMT
Subject: distributing python software in jar like fashion
In-Reply-To: <etbv8p$pg9$1@engnntp2.cig.mot.com>
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<etbv8p$pg9$1@engnntp2.cig.mot.com>
Message-ID: <wbzKh.10576$jx3.1929@newssvr25.news.prodigy.net>

     Were Python "eggs" a flop, or what?

     We need to have one packager that everyone agrees on.
Otherwise, installs become a mess, and then you have to have
installers that handle multiple packagers.

					John Nagle

Gary Duzan wrote:
> In article <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d at comcast.com>, alf  <ask at me> wrote:
> 
>>Hi,
>>
>>I have a small app which consist of a few .py files. Is there any way to 
>>distribute it in jar like fashion as a single file I can just run python 
>>on. I obviously look for platform independent solution.
>>
>>Thx in advance, A.
> 
> 
>    There is a new package that has been discussed here recently
> called Squisher that should do what you want by packing things into
> a single pyc file. There are still some minor issues that need to
> be ironed out with running the pyc directly, but it should do
> exactly what you want Real Soon Now.
> 
> http://groups.google.com/groups/search?q=group%3Acomp.lang.python+squisher&qt_s=Search
> 
> 					Gary Duzan
> 					Motorola CHS
> 
> 


From steve at REMOVEME.cybersource.com.au  Mon Mar 12 22:29:56 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Tue, 13 Mar 2007 13:29:56 +1100
Subject: Single string print statements on multiple lines.
References: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
	<55kv29F24oq26U1@mid.uni-berlin.de>
	<1173703244.814332.63850@64g2000cwx.googlegroups.com>
Message-ID: <pan.2007.03.13.02.29.55.759425@REMOVEME.cybersource.com.au>

On Mon, 12 Mar 2007 05:40:44 -0700, MonkeeSage wrote:

> HeEm wrote:
>> In my 100 level CS course, I was asked to create multiple lines of
>> output within a single string.  Of course I know how to:
> 
> If this is for a CS course, you shouldn't really be cheating and
> asking for an answer here, should you? I mean, the whole point of
> taking (and paying for!) a CS course is to learn CS, right? 

"Always go over old ground, re-inventing the wheel again and again" is the
least efficient, most error-prone way of learning comp sci (or any other
subject for that matter).

There's a fuzzy line between "help me to learn this" and "do my work for
me", but it is a real distinction. One of the distinguishing
characteristics of an educated person and an ignoramus is that the
educated person not only knows more stuff, but more importantly knows how
to find out what he doesn't already know. That can include looking it up
in a reference book or asking somebody who does know.



-- 
Steven D'Aprano 



From researchbase at gmail.com  Tue Mar 13 03:33:09 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Tue, 13 Mar 2007 13:03:09 +0530
Subject: Python in a desktop environment
In-Reply-To: <tbsJh.9383$PL.4714@newsread4.news.pas.earthlink.net>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<12vatcq6vh3v7ba@corp.supernews.com>
	<tbsJh.9383$PL.4714@newsread4.news.pas.earthlink.net>
Message-ID: <f81479dd0703130033gf3074abh796a458ad44ae307@mail.gmail.com>

I have coded some complex programs in python in the recent past.
I find it very robust and also not very slow (as is depicted by the
starter of this thread )  I use wxpython on the gui side and testify
that it is indeed very suitable for huge gui apps.
may be pyqt is good enough too and I believe so.
I don't find there is any reason to go stay in a hut when you have a
banglo to stay.
may be c++ gives you more control on pointers etc but what if you just
forgot to use that control properly?  afterall we are all humans.
so python is really good for speed as well as robustness if you can
understand the meaning of it.  and I wont want to again give the
meaning of the word because some one has already done it.
regards.
Krishnakant.


From gagsl-py2 at yahoo.com.ar  Sun Mar 25 14:37:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 15:37:55 -0300
Subject: organizing collections of small modules
References: <eu68uf$bkn$1@sea.gmane.org>
Message-ID: <op.tprcphzzx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 13:44:54 -0300, Eric S. Johansson <esj at harvee.org>  
escribi?:

> I have a bunch of small modules that I use within my application.  Most
> of these modules are single file modules.  Currently, I have them set up
> as stand-alone modules but because it's a royal pain to fetch five or 10
> of these modules for each application and tracking whether or not they
> are all up to date, I'm considering putting them all into one collection
> (rcsoc  a.k.a. random cross-section of code[1]) so it's easier to load,
> install, and manage.
>
> Are there better techniques for managing collections of modules in 2.4
> or later?

Take a look at "source code management" (or software configuration  
management).
Using CVSNT by example: you keep a full history of all module changes; you  
can retrieve any source as it was in a given time; you can organize your  
code into "modules" (higher order modules than python modules) that you  
can combine into projects.

-- 
Gabriel Genellina



From paltman at gmail.com  Tue Mar 13 09:38:24 2007
From: paltman at gmail.com (Patrick Altman)
Date: 13 Mar 2007 06:38:24 -0700
Subject: httplib/socket problems reading 404 Not Found response
In-Reply-To: <mailman.4994.1173757609.32031.python-list@python.org>
References: <1173755273.697153.97270@64g2000cwx.googlegroups.com>
	<mailman.4994.1173757609.32031.python-list@python.org>
Message-ID: <1173793104.358361.137130@30g2000cwc.googlegroups.com>

> Yes, it's a known problem. See this message with a self-response:http://mail.python.org/pipermail/python-list/2006-March/375087.html

Are there plans to include this fix in the standard Python libraries
or must I make the modifications myself (I'm running Python 2.5)?




From nogradi at gmail.com  Thu Mar  1 03:44:27 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Thu, 1 Mar 2007 09:44:27 +0100
Subject: Fwd: gmpy moving to code.google.com
In-Reply-To: <1172728550.065260.92750@p10g2000cwp.googlegroups.com>
References: <mailman.4420.1172510312.32031.python-announce-list@python.org>
	<5f56302b0702261230y644b039dmc574112830cff771@mail.gmail.com>
	<e8a0972d0702261633u4d809969jd7b8fe80286cce63@mail.gmail.com>
	<5f56302b0702270259i446e1c32w5fffaf00354051b5@mail.gmail.com>
	<A25EADE7-105C-47E7-83DD-640F4B0900C7@gmail.com>
	<mailman.4463.1172596234.32031.python-list@python.org>
	<1172691395.635962.90050@j27g2000cwj.googlegroups.com>
	<mailman.4547.1172715538.32031.python-list@python.org>
	<1172728550.065260.92750@p10g2000cwp.googlegroups.com>
Message-ID: <5f56302b0703010044q40ea92f0k226a1e00a83d98e@mail.gmail.com>

> > Could you please tell me, on that 64-bit build, what happens with:
>
> > >>> importgmpy, sys, operator
> > >>> sys.maxint
> > ???
> > >>>gmpy.mpz(sys.maxint)
> > ???
> > >>> operator.index(gmpy.mpz(sys.maxint))
> > ???
> > >>> sys.maxint+1
> > ???
> > >>>gmpy.mpz(sys.maxint+1)
> > ???
> > >>> operator.index(gmpy.mpz(sys.maxint)+1)
> > ???
>
> > i.e., what are the values correspondiing to the ??? occurrences when
> > you actually do that...?
>
> Here it goes (python 2.5 - 64bit):
>
> >>> importgmpy, sys, operator
> >>> sys.maxint
> 9223372036854775807
> >>>gmpy.mpz(sys.maxint)
> mpz(-1)
> >>> operator.index(gmpy.mpz(sys.maxint))
> -1
> >>> sys.maxint+1
>
> 9223372036854775808L>>>gmpy.mpz(sys.maxint+1)
>
> mpz(9223372036854775808L)>>> operator.index(gmpy.mpz(sys.maxint)+1)
>
> 0
>
> I don't pretent to fully understand what's going on,
> butgmpy.mpz(sys.maxint)==gmpy.mpz(-1) is more than suspicious :)


[directing Alex's message back to the list]


Yes, clearly there is some 32-vs-64 bit assumption around.  When I
create an mpz from a Python int (a PyObject* i which passes Python's
int typecheck) I do that by calling mpz_from_c_long(PyInt_AsLong(i))
-- depending on what "long" means in C, I guess that might be the root
of the problem.  There might be similar problems in creating mpq and
mpf from Python ints > 2**31-1 on 64-bit platforms, I guess.

I could try flailing around in the dark to fix it, but, without access
to a 64-bit Python platform, I don't really see any chance of me
fixing this.

If somebody can give me ssh access to such a platform, I'll be glad to
work to give it a try; of course, if anybody who does have access to
such a platform wants to send me patches or join the gmpy project,
that would also be great; failing either of these options, I don't see
much that I could do beyond pointing out in the docs that gmpy does
not correctly support 64-bits builds of Python, checking for them in
the unittests, etc.


Thanks,

Alex


From rzantow at gmail.com  Thu Mar  1 06:53:28 2007
From: rzantow at gmail.com (rzed)
Date: Thu, 01 Mar 2007 06:53:28 -0500
Subject: quickly read a formated file?
References: <mailman.4556.1172736249.32031.python-list@python.org>
	<1172740062.523000.209320@8g2000cwh.googlegroups.com>
Message-ID: <Xns98E6461AA4247rzantowgmailcom@208.49.80.253>

bearophileHUGS at lycos.com wrote in
news:1172740062.523000.209320 at 8g2000cwh.googlegroups.com: 

> lialie:
>> The formated file may be very popularly, but the module
>> ConfigPaser doesn't handle it. Is there a way to process it
>> freely? 
> 
> First try, assuming the input file can be read whole. The code
> isn't much readable, it needs better variable names (name
> names?), comments, etc.
> 
> data = """
> %HEADER
> title1 = "Untilted1"
> username = "User1"
> 
> %DATA
> title2 = "Untilted2"
> username2 = "User2"
> """
> 
> l1 = (p.strip().splitlines() for p in data.split("%") if
> p.strip()) result = {}
> for part in l1:
>     pairs1 = (pair.split('=') for pair in part[1:])
>     pairs2 = ((k.strip(), v.strip().strip('"')) for k,v in 
pairs1) result[part[0]] = dict(pairs2)
> print result
> 
> 

If there could be embedded perecent signs in the data, that will 
produce some unexpected results, though. Here's another shot:

data = """
%HEADER
title1 = "Untilted1"
username = "User1"

%DATA
title2 = "The 7% Solution"
username2 = "User2"
"""

# Assumes there may be embedded percent signs in data
# and all data lines are of the form key = value
def parseData(data):
    pd = {}
    idata = iter(data)
    for line in idata:
        line = line.strip()
        if line.startswith('%'):
            tname = line[1:]
            cd = pd[tname] = {}
            line = idata.next().strip()
            while line != '':
                if line.find('=') > 0:
                    id,val = line.split('=',1)
                    cd[id.strip()] = val.strip().strip('"')
                line = idata.next().strip()
    return pd


print parseData(data.split('\n'))



From mhellwig at xs4all.nl  Thu Mar  1 12:50:15 2007
From: mhellwig at xs4all.nl (Martin P. Hellwig)
Date: Thu, 01 Mar 2007 18:50:15 +0100
Subject: How to update DNS record
In-Reply-To: <es5v6v$pv8$1@online.de>
References: <es5v6v$pv8$1@online.de>
Message-ID: <45e71210$0$323$e4fe514c@news.xs4all.nl>

Andi Clemens wrote:
> Hi,
> 
> I want to update our DNS servers periodically with some IP addresses. But I
> don't know how to do this.
> I searched the Internet quite a while but I haven't found a good example how
> to do this.
> I want to change the A-Record for some IPs, this shouldn't be too hard.
> I looked at dnspython and twisted, but I really don't have a clue how to do
> this.
> Has anyone done this before?
> 
> Andi

I'll looked at the perl function you mentioned and it seems to me (but 
I'm not a pearl coder) that it uses the dynamic update procedure, which 
is explained by the RFC 2136 (Bjoern mentioned that already).

So I googled for "Python DNS dynamic update" and in the results the 
following site looked promising, http://www.dnspython.org/.

hth

--
mph


From stanc at al.com.au  Thu Mar 29 01:16:10 2007
From: stanc at al.com.au (Astan Chee)
Date: Thu, 29 Mar 2007 15:16:10 +1000
Subject: upgrading python (and other modules)
Message-ID: <460B4B9A.1010703@al.com.au>

Hi,
I was once using python 2.4 in win2k with wxPython 2.4.2.4 (if im not 
mistaken) with it.
Now i've upgraded to winXP and am using python 2.5 with wxPython 2.8.1.1.
The problem Im currently having is that in my code:

from wxPython.wx import *
from wxPython.grid import *
from wxPython.html import *

no longer works. An error/warning appears:

Warning (from warnings module):
  File "C:\stanc_home\WHIP\whip.py", line 7
    from wxPython.wx import *
DeprecationWarning: The wxPython compatibility package is no longer 
automatically generated or activly maintained.  Please switch to the wx 
package as soon as possible.

Traceback (most recent call last):
  File "C:\stanc_home\WHIP\whip.py", line 10, in <module>
    from wxPython.html import *
  File "C:\Python25\lib\site-packages\wx-2.8-msw-ansi\wxPython\html.py", 
line 151, in <module>
    wxHtmlWindowEvent = wx.html.HtmlWindowEvent
AttributeError: 'module' object has no attribute 'HtmlWindowEvent'

How should I be importing in the new wx?
Thanks!
Astan



From gagsl-py2 at yahoo.com.ar  Thu Mar 15 19:45:35 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 20:45:35 -0300
Subject: mod_python demo
References: <45f7e45c$1@griseus.its.uu.se>
Message-ID: <op.to87992gx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 09:02:36 -0300, Jan Danielsson  
<jan.m.danielsson at gmail.com> escribi?:

> Hello all,
>
>    I have written a web-based voting system (add question, add possible
> answers to that question, and let users vote) in python. It uses: [...]
>    Is there any Python/web community site anywhere which allows users to
> upload template code for others to use?

The Python Package Index http://www.python.org/pypi is intended mostly for  
packages, but you can find a suitable category on the wiki:  
http://wiki.python.org/moin/

-- 
Gabriel Genellina



From wescpy at gmail.com  Sat Mar 24 13:10:12 2007
From: wescpy at gmail.com (wesley chun)
Date: Sat, 24 Mar 2007 10:10:12 -0700
Subject: Need help to learn Python
Message-ID: <78b3a9580703241010t466a0109y9501783152d67abd@mail.gmail.com>

> From: kyoso... at gmail.com
> Date: 23 Mar 2007 06:20:15 -0700
>
> Core Python Programming is mostly theory and very little code. It's
> good for reference and digging deeper into the language...


let me clarify here that mike's statement refers to the total number
of large applications in the book.  Core Python *does* have a lot of
code in it, but they are mostly snippets and bits using the
interactive interpreter.  i chose this model instead of many large
applications because:

1) i feel that small snippets that people can follow along with in the
interpreter is more valuable... in fact, many readers *don't* have the
interpreter in front of them, but they can see what it does so that
once they *are* in front of it, it does what they expect

2) providing smallish to medium-sized applications allows for maximum
absorption by the reader

3) i didn't have time to develop lots of large applications... if you
learn with lots of large applications with lots of code, then this
book is not for you.

with that said, i would still like to state that the book's target
audience is for people who know how to program but need to pick up
Python as quickly as possible.  the "theory" that's in the book is
really more explanation of how the Python interpreter works,
especially the relationship between objects and memory management.
the goal is to give you enough of an understanding of how Python works
"under the covers" that you will write very effective code, even as a
beginner to the language.

you can read more of my "manifesto" on Amazon's page for the book as
well as at the book's website below.

cheers!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From jeff at jmcneil.net  Tue Mar 27 17:01:31 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Tue, 27 Mar 2007 17:01:31 -0400
Subject: How can I catch all exception in python?
In-Reply-To: <1175021154.251183.95270@e65g2000hsc.googlegroups.com>
References: <1175018958.602131.145190@y80g2000hsf.googlegroups.com>
	<1175019354.070308.4080@l77g2000hsb.googlegroups.com>
	<1175021154.251183.95270@e65g2000hsc.googlegroups.com>
Message-ID: <82d28c40703271401t1b468e02q112cc73e922a8e74@mail.gmail.com>

You could also use sys.excepthook if you're trying to handle uncaught
exceptions.



On 27 Mar 2007 11:45:54 -0700, irstas at gmail.com <irstas at gmail.com> wrote:
>
> On Mar 27, 9:15 pm, kyoso... at gmail.com wrote:
> > Technically speaking, you can catch all errors as follows:
> >
> > try:
> >    # do something
> > except Exception, e:
> >    print e
>
> That won't catch exceptions/errors that don't derive from
> Exception class. For example a string won't be caught:
>
> try:
>    raise "foo"
> except Exception, e:
>    print e
>
> But this will catch all exceptions:
>
> try:
>    raise "foo"
> except:
>    print sys.exc_info()
>
> (there may be other ways I don't know of)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  9 05:48:49 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 Mar 2007 11:48:49 +0100
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
Message-ID: <55csbrF23meg4U2@mid.individual.net>

bressert at gmail.com wrote:

> I'm considering about generating some Python Bindings for C++
> libraries. What are considered the best tools for doing something
> like this? I know that there are SWIG, SIP, Boost.Python, and
> GCC_XML.

Please excuse me for asking the following stupid question ...

I'm planning to buy a car. What is the best brand? I know that there
are Mercedes, Opel, Honda and Ford.

Regards,


Bj?rn

P.S.: Try this googled link and look for the comparation paragraph,
in section "Introduction":
 http://www.boost-consulting.com/writing/bpl.html

-- 
BOFH excuse #163:

no "any" key on keyboard



From joncle at googlemail.com  Fri Mar 16 09:34:15 2007
From: joncle at googlemail.com (Jon Clements)
Date: 16 Mar 2007 06:34:15 -0700
Subject: String formatting with fixed width
In-Reply-To: <ete5ec$juo$2@online.de>
References: <ete5ec$juo$2@online.de>
Message-ID: <1174052055.723035.175330@n76g2000hsh.googlegroups.com>

On 16 Mar, 13:20, Alexander Eisenhuth <newsu... at stacom-software.de>
wrote:
> Hello alltogether,
>
> is it possible to format stings with fixed width of let's say 7 character. T
> need a floating point with 3 chars before dot, padded with ' ' and 3 chars after
> dot, padded with '0'.
>
> Followingh is my approach
>  >>> f = 21.1
>  >>> s = "%.03f" % f
>  >>> s
> '21.100'
>
> But there are missing ' '. How can I get that? (For bigger numbers than 999 they
> might be cut: 1021 -> 021)

You can use something like this:
>> print '%7.03f' % 21.1
' 21.100'


However, this will only make the string at *least* 7 long. If the
length of the number exceeds this, you'll end up with it even longer;
for instance:

>> print '%7.03f' % 2123123121.1
'2123123121.100'

>From your example about 'cutting' it, it looks like you just might be
able to take the last 7 chars from it using [-7:]

hth

Jon.








From edurand.com at gmail.com  Tue Mar  6 08:16:21 2007
From: edurand.com at gmail.com (edurand)
Date: 6 Mar 2007 05:16:21 -0800
Subject: image processing
In-Reply-To: <7xirdekauw.fsf@ruckus.brouhaha.com>
References: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>
	<7xirdekauw.fsf@ruckus.brouhaha.com>
Message-ID: <1173186981.056242.152120@64g2000cwx.googlegroups.com>

On Mar 6, 9:57 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "edurand" <edurand.... at gmail.com> writes:
> > You can use it in Python, and we have provided tutorials and samples
> > in Python, with for exemple conversion from/to PIL image format.
> > Have a look at :http://filters.sourceforge.net/
>
> Looks interesting, however the example screen shot is shrunk down so
> the text on it can't be read.  Also there are a bunch of sample
> filters with example images, but no explanation at all of what the
> filters do.  Finally, it keeps mentioning things like "dll" which
> suggests this is a Windows library.  Is it?  Maybe it can be ported to
> other OS's or maybe it's already multi-platform, but the web site
> should make the situation clear either way.

It's a DLL, so yes, it run on Windows.
If someone would like to port it on other OS, why not.
To test it, you can download the software 'FiltersTest', for Windows
of course



From steve at REMOVEME.cybersource.com.au  Wed Mar 14 04:34:46 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 14 Mar 2007 19:34:46 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
	<1173843736.982126.211530@l77g2000hsb.googlegroups.com>
	<pan.2007.03.14.07.02.32.652175@REMOVEME.cybersource.com.au>
	<7xabygti89.fsf@ruckus.brouhaha.com>
	<pan.2007.03.14.08.25.45.281805@REMOVEME.cybersource.com.au>
Message-ID: <pan.2007.03.14.08.34.45.127052@REMOVEME.cybersource.com.au>

On Wed, 14 Mar 2007 19:25:46 +1100, Steven D'Aprano wrote:

> Now that I've seen your _partition() function, I'm quite impressed. It is
> still brute-force, but it avoids generating all 50**5 non-unique lists. By
> my count, it only has to throw away 11,294 lists to generate the 2611
> unique lists it returns.

Ignore that count. I don't know where I got 11,294 from, the correct
figure is 10,358.

Oh, I seem to have found a bug in the _partitions() function. I believe it
is missing some of the partitions.

>>> list(_partitions(25, 24))
[(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2)]
>>> list(_partitions(25, 25))
[]


-- 
Steven D'Aprano 



From skip at pobox.com  Sat Mar 31 10:27:19 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 31 Mar 2007 09:27:19 -0500
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
In-Reply-To: <576vhbF2ca1guU1@mid.individual.net>
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
Message-ID: <17934.28615.247638.246949@montanaro.dyndns.org>


    Bj?rn> Mark Dufour wrote:
    >> Shed Skin allows for translation of pure (unmodified), implicitly
    >> statically typed Python programs into optimized C++, and hence,
    >> highly optimized machine language.
    Bjoern>   ^^^^^^^^^^^^^^^^

    Bjoern> Wow, I bet all C++ compiler manufacturers would want you to work
    Bjoern> for them.

Why are you taking potshots at Mark?  He's maybe onto something and he's
asking for help.  If he can generate efficient C++ code from implicitly
statically type Python it stands to reason that he can take advantage of the
compiler's optimization facilities.

Skip


From mikeminer53 at hotmail.com  Fri Mar 30 10:48:31 2007
From: mikeminer53 at hotmail.com (mkPyVS)
Date: 30 Mar 2007 07:48:31 -0700
Subject: Memory testing in Python
In-Reply-To: <599vd4-1rg.ln1@lairds.us>
References: <1175242912.103313.99110@n59g2000hsh.googlegroups.com>
	<599vd4-1rg.ln1@lairds.us>
Message-ID: <1175266111.159492.131320@l77g2000hsb.googlegroups.com>

>While I have a great deal of interest in memory management,
>my general reaction to your question as you've posed it is,
>"Don't; concentrate for now on good Python style."

I agree but for monitoring...

I've had good luck with executing a popen to grab and parse output
from ps -Af and pass it your own process ID as the search. It adds
overhead to the cpu exec time but it is much less than 1sec so you
won't see it.



From paul at boddie.org.uk  Thu Mar 15 11:02:25 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Mar 2007 08:02:25 -0700
Subject: Returning other instance from __init__
In-Reply-To: <1hv0amj.14r0m02if7iblN%aleax@mac.com>
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
	<1173958589.875188.203900@y80g2000hsf.googlegroups.com>
	<1hv0amj.14r0m02if7iblN%aleax@mac.com>
Message-ID: <1173970945.521794.54040@n59g2000hsh.googlegroups.com>

On 15 Mar, 15:50, a... at mac.com (Alex Martelli) wrote:
> Paul Boddie <p... at boddie.org.uk> wrote:
> > Call me a traditionalist, but why wouldn't a factory function be good
> > enough?
>
> That depends on whether you need name C1 to refer to a class, or not.

Right.

> If you want name C1 to be usable outside this module as a class (to
> subclass it, use with isinstance or issubclass, be available to an IDE's
> classbrowser or other means of introspection including pydoc, etc), then
> making name C1 refer to a function instead would not work.

True. I can easily buy the argument about wanting to subclass C1,
although you'd always have the real class available somewhere as well.
For things like IDEs, class browsers and so on, I think more work
needs to be done to make these things more "aware" - it sounds like
they expect a more rigid language (like Java), but I do have some
awareness of why it's tempting to let them operate on their current
level of introspection.

> > Or perhaps seeing more special methods and decorators just puts me in
> > a grumpy mood. ;-) For me, the power of Python is derived from being
> > able to do things like making callables "constructors" whilst
> > providing some illusion that C1 (in this case) is a class.
>
> For me, OTOH, it's not just smoke and mirrors (or as you say
> "illusion"), there's also plenty of real power, and __new__ is part of
> that.

Oh, I like the illusion! The illusion is what makes Python so
powerful, after all.

Paul



From http  Sat Mar  3 18:32:18 2007
From: http (Paul Rubin)
Date: 03 Mar 2007 15:32:18 -0800
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<7xabywnugu.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>
	<7xtzx4i43e.fsf@ruckus.brouhaha.com>
	<pan.2007.03.03.23.15.30.246639@REMOVE.THIS.cybersource.com.au>
Message-ID: <7x3b4lucn1.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> Unless there is a type system that can automatically deal with the
> semantic difference between (say) screen coordinates and window
> coordinates, or between height and width, or safe and unsafe strings, the
> coder still has to deal with it themselves.
> 
> And even if there is such a type system, Python isn't it.

Python uses runtime typing, so you'd define classes for screen and
window coordinates, and have them do appropriate conversions or raise
exceptions when you do mixed operations.  The compiler wouldn't notice
this happening at compile time, but that's just like the rest of
Python.

> The point I'm trying to get across isn't that Apps Hungarian is the best
> imaginable solution to the problem of dealing with semantically different
> kinds of data. But it is an easy solution that works quite well (not
> perfectly) and (unlike relying on Haskell's type system) it can be
> applied to Python quite easily.

I think the notion above fits ok into Python's dynamic typing scheme.
Yeah, you may get runtime exceptions at unexpected times due to type
conflicts that you overlooked in testing, but again, the Pythonic
prescription for these and other errors seems to be "write more tests".

Maybe we can concoct a cross between Python and Haskell, and call it
"Paskell" after the philosopher Blaise ;-).


From rehceb at no.spam.plz  Sat Mar 31 09:42:12 2007
From: rehceb at no.spam.plz (Rehceb Rotkiv)
Date: Sat, 31 Mar 2007 08:42:12 -0500
Subject: Sorting a multidimensional array by multiple keys
References: <pan.2007.03.31.12.43.14@no.spam.plz>
	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
Message-ID: <pan.2007.03.31.13.42.19@no.spam.plz>

> If you want a good answer you have to give me/us more details, and an
> example too.

OK, here is some example data:

reaction is BUT by the
sodium , BUT it is
sea , BUT it is
this manner BUT the dissolved
pattern , BUT it is
rapid , BUT it is

As each line consists of 5 words, I would break up the data into an array 
of five-field-arrays (Would you use lists or tuples or a combination in 
Python?). The word "BUT" would be in the middle, with two fields/words 
left and two fields/words right of it. I then want to sort this list by

- field 3
- field 4
- field 1
- field 0

in this hierarchy. This is the desired result:  

pattern , BUT it is
rapid , BUT it is
sea , BUT it is
sodium , BUT it is
reaction is BUT by the
this manner BUT the dissolved

The first 4 lines all could not be sorted by fields 3 & 4, as they are 
identical ("it", "is"), so they have been sorted first by field 1 (which 
is also identical: ",") and then by field 0:

pattern
rapid
sea
sodium

I hope I have explained this in an understandable way. It would be cool 
if you could show me how this can be done in Python!

Regards,
Rehceb


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 13 07:31:17 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 12:31:17 +0100
Subject: Single string print statements on multiple lines.
In-Reply-To: <1173727915.911896.136890@t69g2000cwt.googlegroups.com>
References: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
	<1173727915.911896.136890@t69g2000cwt.googlegroups.com>
Message-ID: <45f68b7a$0$23627$426a74cc@news.free.fr>

Goldfish a ?crit :
> http://www.catb.org/~esr/faqs/smart-questions.html
> 
> Don't post homework questions.
> 
Given the way the question was expressed, I don't think this particular 
rule applies here. Obviously, the OP is not trying to cheat (explicitelt 
aknowledging it is homework), and has a good enough understanding of 
what the usual solution is (asking for the escape char in Python).

Now of course the answer is in the FineManual(tm), which implies that 
either the OP failed to read it, or that the FineManual is not so fine - 
but that's another problem.

My 2 cents...








From sgeiger at ncee.net  Fri Mar 16 16:51:49 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Fri, 16 Mar 2007 15:51:49 -0500
Subject: How to get the previous line in a file?
In-Reply-To: <882682.16208.qm@web58912.mail.re1.yahoo.com>
References: <882682.16208.qm@web58912.mail.re1.yahoo.com>
Message-ID: <45FB0365.5000301@ncee.net>

lines = open('/tmp/foo.py', 
"r").read().splitlines()                                                                                                    

previous_line = 
''                                                                                                                                      

for line in 
lines:                                                                                                                                      

    if "foo" in 
line:                                                                                                                                   

        print "found foo in the current line.  The previous line is:  " 
+ 
previous_line                                                                 

    previous_line = 
line                                                                                                                                



Qilong Ren wrote:
> Hi,all
>
> I am new to this list. And I am glade I am here.
> I have a question. I need to do some text processing. I need to read 
> from a file line by line. If some line is met with some condition, the 
> previous line needs some modification. How to get the info of the 
> previous line?
>
> Thanks!
> Qilong
>
> ------------------------------------------------------------------------
> Never miss an email again!
> Yahoo! Toolbar 
> <http://us.rd.yahoo.com/evt=49938/*http://tools.search.yahoo.com/toolbar/features/mail/> 
> alerts you the instant new Mail arrives. Check it out. 
> <http://us.rd.yahoo.com/evt=49937/*http://tools.search.yahoo.com/toolbar/features/mail/>

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From deets at nospam.web.de  Tue Mar 13 18:26:29 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 Mar 2007 23:26:29 +0100
Subject: help!! *extra* tricky web page to extract data from...
In-Reply-To: <7xmz2gbx6r.fsf@ruckus.brouhaha.com>
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
	<55oli1F25u2dmU1@mid.uni-berlin.de>
	<7xmz2gbx6r.fsf@ruckus.brouhaha.com>
Message-ID: <55omooF25ll0vU1@mid.uni-berlin.de>

Paul Rubin schrieb:
> "Diez B. Roggisch" <deets at nospam.web.de> writes:
>> Still, some pages are AJAX, you won't be able to scrape them easily
>> without analyzing the JS code.
> 
> Sooner or later it would be great to have a JS interpreter written in
> Python for this purpose.  It would do all the same operations on an
> HTML/XML DOM that a browser does, basically all the stuff of a browser
> except rendering into pixels.  JS semantics are similar enough to
> Python that maybe the JS could be compiled into Python byte code.

Nice idea, but not really helpful in the end. Besides the rather nasty 
parts of the DOMs that make JS programming the PITA it is, I think the 
whole event-based stuff makes this basically impossible.

Diez


From pecora at anvil.nrl.navy.mil  Mon Mar 12 12:43:09 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Mon, 12 Mar 2007 12:43:09 -0400
Subject: New to Python
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
	<1173704503.459048.310560@t69g2000cwt.googlegroups.com>
Message-ID: <pecora-D3B536.12430812032007@ra.nrl.navy.mil>

In article <1173704503.459048.310560 at t69g2000cwt.googlegroups.com>,
 "Dustan" <DustanGroups at gmail.com> wrote:

> > What is the best way to get documentation about the functions
> > and classes of python? I tried to google, but usually I can just
> > find the __doc__ of the objects, without examples or anything that
> > can help me use it.
> >
> > Alberto Monteiro
> 
> Refer to this as a reference:
> http://docs.python.org/
> 
> It includes a tutorial and documentation on the functions and classes
> in all the global modules, as well as builtin functions (http://
> docs.python.org/lib/built-in-funcs.html) and syntax. If you have prior
> experience with programming, you may be able to learn python from the
> tutorial, but otherwise, I would highly recommend you get a good book
> for beginners on python (http://wiki.python.org/moin/PythonBooks);
> there's plenty of them out there.


Python in a Nutshell by Martelli (O'Reilly publ.) is very good.  

I also liked Learning Python by Lutz and Ascher (O'Reilly publ.) when I 
started Python, but I don't know if that's been updated recently.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From gagsl-py2 at yahoo.com.ar  Tue Mar 20 19:58:01 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 20:58:01 -0300
Subject: mysterious unicode
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<mailman.5357.1174433396.32031.python-list@python.org>
	<1174434442.142511.37240@p15g2000hsd.googlegroups.com>
Message-ID: <op.tpih6zpjx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 20:47:22 -0300, Gerry <gerard.blais at gmail.com>  
escribi?:

> Thanks! - that helps a lot.
>
> I'm still mystified why:
>    qno was ever unicode, and why

I can't tell...

>    qno.encode("ascii", "replace") is still unicode.

That *returns* a string, but you are discarding the return value. Should  
be qno = qno.encode(...)
It's similar to lower(), by example.

-- 
Gabriel Genellina



From deets at nospam.web.de  Mon Mar 12 06:40:11 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 11:40:11 +0100
Subject: programmatically manipulation environment variables of the
	calling shell
References: <mailman.4959.1173695641.32031.python-list@python.org>
Message-ID: <55kp0cF25ntciU1@mid.uni-berlin.de>

Maxim Veksler wrote:

> Hello list,
> 
> I'm trying to write a python script that would allow me to manipulate
> shell variables of the calling shell. I'm trying to write some logic
> that would know to add LD_LIBRARY_PATH to the users environment.
> 
> In bash this is done with "export", can I do this with python? (If at
> all possible because python is actually a sub process of bash).

It's not possible, OS restrictions - you are not allowed to alter the
environment of a parent process. 

Diez


From cfbolz at gmx.de  Wed Mar 28 17:41:33 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 23:41:33 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175083955.167868.88610@n76g2000hsh.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
Message-ID: <460AE10D.9030101@gmx.de>

Kay Schluehr wrote:
 > Nice to read that things are going on. I've still a PyPy 0.7 version
 > on my notebook. I guess I will upgrade :)
 >
 > A somewhat unrelated question. With Py3K Python gets optional type
 > annotations. Are you already architecting an annotation handler that
 > can process these annotations? This feature is somewhat competitive to
 > all the complicated type inference and jitting you have been worked
 > out so I don't know how it fits well into the current PyPy
 > architecture?

I don't see at all why type annotations are competitive to the type
inference that PyPy's translation toolchain is doing. The type inference
of PyPy is an artefact of the way we are implementing our interpreter
(namely in RPython). You also wouldn't say that the static typing of C
is competitive to type annotations because CPython is written in C,
right?

The JIT (which is completely independent from our type inference engine)
will hopefully deal well with the eventual addition of type annotations
(it's not clear to me how soon we will start supporting Py3k features,
we are not even fully supporting Python 2.5 yet). Since the JIT is
automatically generated out of the Python interpreter it should deal
with any sort of language changes rather well. Whether that is true in
practice remains to be seen, but this is one of the reason why PyPy was
started in the first place.

Also, I fail to see how type annotations can have a huge speed-advantage
versus what our JIT and Psyco are doing. Imagine you have a function
that is nicely algorithmic, takes only integers as arguments and only
does some calculations with them. If you have a Psyco-like scheme, the
JIT will note that you are using it mostly with ints, generate
relatively efficient assembly for the whole function (at least after it
has been called several times). If you call that functions, the
arguments are checked whether they are integers and then the fast
assembly code is used without any further type checks. How can you
improve on this with type annotations? If the type annotations say that
your arguments have to be ints, you _still_ have to check whether this
is true. So it is not faster than what Psyco is doing and has the
disadvantage that it only works with ints -- good bye, duck typing.
Psyco on the other hand will be perfectly happy with you using a custom
class that looks mostly like an int and generate assembly optimized for
this situation.

Cheers,

Carl Friedrich Bolz


From http  Tue Mar 13 15:35:39 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 11:35:39 -0800
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
	<1173812047.578137.223430@j27g2000cwj.googlegroups.com>
Message-ID: <7xmz2hndh0.fsf@ruckus.brouhaha.com>

"Drew" <olsonas at gmail.com> writes:
> You're exactly on the mark. I guess I was just wondering if your first
> example (that is, breaking the if statement away from the iteration)
> was preferred rather than initially filtering and then iterating.

I think the multiple statement version is more in Python tradition.
Python is historically an imperative, procedural language with some OO
features.  Iterators like that are a new Python feature and they have
some annoying characteristics, like the way they mutate when you touch
them.  It's usually safest to create and consume them in the same
place, e.g. creating some sequence and passing it through map, filter, etc.


From jgodoy at gmail.com  Sun Mar 18 08:53:07 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 18 Mar 2007 09:53:07 -0300
Subject: Automagically log changes in table
References: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
	<1174175976.156270.65830@e1g2000hsg.googlegroups.com>
	<1174188025.545923.272900@l77g2000hsb.googlegroups.com>
	<1174221640.893852.240810@l75g2000hse.googlegroups.com>
Message-ID: <87fy821znw.fsf@gmail.com>

"aspineux" <aspineux at gmail.com> writes:

> On 18 mar, 04:20, "George Sakkis" <george.sak... at gmail.com> wrote:
>>
>> I'd rather avoid triggers since I may have to deal with Mysql 4. Apart
>> from that, how can a trigger know the current user ?
>
> Because each user opening an web session will login to the SQL database
> using it's own login. That way you will be able to manage security at DB
> too. And the trigger will use the userid of the SQL session.

That's not common in web applications (he mentions TurboGears later).  What is
common is having a connection pool and just asking for one of the available
connections, when your app gets it, it just uses it.  After each request this
connection returns to the pool to be reused.


I dunno about SQL Alchemy (also mentioned later), but SQL Object 0.8x has some
events that can be bound so they can act is triggers on your database, but
client side.  Of course they don't have all the context as a real trigger
does, but those might be enough to avoid duplicating lots of code through the
app to set some variable.



-- 
Jorge Godoy      <jgodoy at gmail.com>


From B.Ogryczak at gmail.com  Fri Mar  2 06:22:36 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 2 Mar 2007 03:22:36 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <1172774172.389220.124170@j27g2000cwj.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<1172774172.389220.124170@j27g2000cwj.googlegroups.com>
Message-ID: <1172834556.768612.164050@8g2000cwh.googlegroups.com>

On Mar 1, 7:36 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> On Mar 1, 12:46 pm, "Bart Ogryczak" <B.Ogryc... at gmail.com> wrote:

> > > This solution looks nice, but how does it work?  I'm guessing
> > > struct.unpack will provide me with 8 bit bytes
>
> > unpack with 'B' format gives you int value equivalent to unsigned char
> > (1 byte).
>
> > > (will this work on any system?)
>
> > Any system with 8-bit bytes, which would mean any system made after
> > 1965. I'm not aware of any Python implementation for UNIVAC, so I
> > wouldn't worry ;-)
>
> > > How does count1 work exactly?
>
> > 1,2,4,8,16,32,64,128 in binary are
> > 1,10,100,1000,10000,100000,1000000,10000000
> > x&1 == 1 if x has first bit set to 1
> > x&2 == 2, so (x&2>0) == True if x has second bit set to 1
> > ... and so on.
> > In the context of int, True is interpreted as 1, False as 0.
>
> Thanks Bart.  That's perfect.  The other suggestion was to precompute
> count1 for all possible bytes, I guess that's 0-256, right?

0-255 actually. It'd be worth it, if accessing dictionary with
precomputed values would be significantly faster then calculating the
lambda, which I doubt. I suspect it actually might be slower.




From deets at nospam.web.de  Tue Mar 27 17:42:15 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 Mar 2007 23:42:15 +0200
Subject: pattern search
In-Reply-To: <1175018282.059201.3200@d57g2000hsg.googlegroups.com>
References: <mailman.5671.1175008459.32031.python-list@python.org>
	<56sqtbF29auttU2@mid.uni-berlin.de>
	<1175018282.059201.3200@d57g2000hsg.googlegroups.com>
Message-ID: <56the2F28t97kU1@mid.uni-berlin.de>

Paul McGuire schrieb:
> On Mar 27, 10:18 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
>> Fabian Braennstroem wrote:
>>> Hi,
>>> I wrote a small gtk file manager, which works pretty well. Until
>>> now, I am able to select different file (treeview entries) just by
>>> extension (done with 'endswith'). See the little part below:
>>>                 self.pathlist1=[ ]
>>>                 self.patternlist=[ ]
>>>                 while iter:
>>> #                print iter
>>>                     value = model.get_value(iter, 1)
>>> #                if value is what I'm looking for:
>>>                     if value.endswith("."+ pattern):
>>>                         selection.select_iter(iter)
>>>                         selection.select_path(n)
>>>                         self.pathlist1.append(n)
>>>                         self.patternlist.append(value)
>>>                     iter = model.iter_next(iter)
>>> #                print value
>>>                     n=n+1
>>> Now, I would like to improve it by searching for different 'real'
>>> patterns just like using 'ls' in bash. E.g. the entry
>>> 'car*.pdf' should select all pdf files with a beginning 'car'.
>>> Does anyone have an idea, how to do it?
>> Use regular expressions. They are part of the module "re". And if you use
>> them, ditch your code above, and make it just search for a pattern all the
>> time. Because the above is just the case of
>>
>> *.ext
>>
>> Diez- Hide quoted text -
>>
>> - Show quoted text -
> 
> The glob module is a more direct tool based on the OP's example.  The
> example he gives works directly with glob.  To use re, you'd have to
> convert to something like "car.*\.pdf", yes?
> 
> (Of course, re offers much more power than simple globbing.  Not clear
> how much more the OP was looking for.)

I'm aware of the glob-module. But it only works on files. I was under 
the impression that he already has a list of files he wants to filter 
instead of getting it fresh from the filesystem.

Diez


From openopt at ukr.net  Wed Mar 21 12:40:36 2007
From: openopt at ukr.net (dmitrey)
Date: 21 Mar 2007 09:40:36 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
In-Reply-To: <1174493856.663144.236880@y80g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174493856.663144.236880@y80g2000hsf.googlegroups.com>
Message-ID: <1174495236.067618.69030@l77g2000hsb.googlegroups.com>

>foo bar baz
>foo(bar,baz)
1st still is shorter by 1 char; considering majority of people use
space after comma & number of parameters can be big it yileds
foo bar baz bar2 bar3 bar4
vs
foo(bar, baz, bar2, bar3, bar4)


> result = func1
for this case should using
result = func1()
should remain
+ remaining function defenitions
def myfun(param1, param2,...,paramk, *args, **kwargs)

> How would you write "a = b(c())"?
a = b c()

>So what should "a b c d" be?

>(a, b, c, d)
>a(b, c, d)
>a(b, (c, d))
>a(b(c, d))
>a(b(c(d)))
I mentioned above that it should be 2nd case

>I don't know how caml resolves these ambiguities, or even if caml resolves
them
Yes, he does it perfectly, hence Python could have same abilities. But
I don't insist anything, I only proposed. Since majority disagreed
with the proposition, it don't worth further discussion.
WBR, D.
P.S. Steven, many people aren't able speak English as good as you, so
do I. I hope majority of readers will forgive me for wasting their
costly attantion & time.



From tron.thomas at verizon.net  Wed Mar 28 00:47:56 2007
From: tron.thomas at verizon.net (tron.thomas at verizon.net)
Date: 27 Mar 2007 21:47:56 -0700
Subject: Can't use class variable with private nested class
Message-ID: <1175057276.163869.12850@y66g2000hsf.googlegroups.com>

The following code will print a message only once:
class PrintOnce:
	printOnce = True

	def __init__(self):
		if PrintOnce.printOnce:
			print 'Printing once.'
			PrintOnce.printOnce = False

first = PrintOnce()
second = PrintOnce()

The following code will do the same thing for a nested class:
class Outer:
	class Inner:
		printOnce = True

		def __init__(self):
			if Outer.Inner.printOnce:
				print 'Printing once.'
				Outer.Inner.printOnce = False

	def __init__(self):
		first = Outer.Inner()
		second = Outer.Inner()

outer = Outer()


However the following code, which has a private nested class, does not
work:
class Public:
	class __Private:
		printOnce = True

		def __init__(self):
			print 'Creating a __Private instance'
			if Public.__Private.printOnce:
				print 'Printing once.'
				Public.__Private.printOnce = False

	def __init__(self):
		print 'Creating a Public instance'
		first = Public.__Private()
		second = Public.__Private()

public = Public()

Attempting to run the code will produce this error:
AttributeError: class Public has no attribute '_Private__Private'

What can be done so that this private nested class can have the same
functionality as the public nested class?



From gagsl-py2 at yahoo.com.ar  Tue Mar  6 05:37:38 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 Mar 2007 07:37:38 -0300
Subject: Newbie question
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<eshihi$1vq7$1@ulysses.news.tiscali.de>
	<1173117307.283564.22270@30g2000cwc.googlegroups.com>
	<pan.2007.03.06.09.15.00.164763@dev.slash.null>
Message-ID: <op.torjs0mnx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 06:15:03 -0300, Ayaz Ahmed Khan <ayaz at dev.slash.null>  
escribi?:

> "Joshua.R.English at gmail.com" typed:
>>> Tommy Grav schrieb:
>>> For this case, there are list comprehensions (or map, but you shouldn't
>>> use it any longer):
>>
>> I didn't see anything in the docs about this.  Is map going away or is
>> it considered un-Pythonic now?
>
> Most everywhere I've read about map() and filter() seemed to
> discourage their use stating that they're becoming depreciated (with the
> exception of Dive Into Python which advocates use of these two functions
> in preference to even list comprehensions, if I've read it properly).

reduce() will disappear on Python 3.0; map and filter may stay.
See http://www.python.org/dev/peps/pep-3100/ and  
http://www.artima.com/weblogs/viewpost.jsp?thread=98196

-- 
Gabriel Genellina



From cslush at gmail.com  Sat Mar 17 21:23:08 2007
From: cslush at gmail.com (sleek)
Date: 17 Mar 2007 18:23:08 -0700
Subject: IDE for wxPython
In-Reply-To: <mailman.5235.1174178014.32031.python-list@python.org>
References: <mailman.5235.1174178014.32031.python-list@python.org>
Message-ID: <1174180988.678854.200120@p15g2000hsd.googlegroups.com>

On Mar 17, 4:12 pm, Ghirai <ghi... at ghirai.com> wrote:
> Hello python-list,
>
> Can anyone suggest an IDE for wxPython?
> Or an IDE for TkInter?
>
> Thanks.
>
> --
> Best regards,
> Ghirai.

You might want to check out SPE. It's a great Python IDE.
http://pythonide.blogspot.com/



From bdesth.quelquechose at free.quelquepart.fr  Fri Mar  2 20:49:13 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 03 Mar 2007 02:49:13 +0100
Subject: cyclic iterators ?
In-Reply-To: <1172884260.852007.122260@64g2000cwx.googlegroups.com>
References: <1172884260.852007.122260@64g2000cwx.googlegroups.com>
Message-ID: <45e8cc36$0$6774$426a74cc@news.free.fr>

Tool69 a ?crit :
> Hi,
> 
> Let say I've got a simple list like my_list = [ 'a', ',b', 'c' ].
> We can have an iterator from it by k =  iter( my_list), then we can
> access each of her (his ?) element by k.next(), etc.
> 
> Now, I just wanted k to have the following cyclic behaviour (without
> rising the ) :
> 
> 
>>>k.next() 
> 'a'
>>>k.next()
> 'b'
>>>k.next()
> 'c'
>>>k.next()     -> not raising StopIteration error
> 'a'
>>>k.next()
> 'b'
> etc.
> 

> I've tried something like this to have a cyclic iterator without
> sucess:
> 
(snip code)


> I missed something, but I don't know what exactly.

from itertools import cycle

HTH


From hitesh287 at gmail.com  Tue Mar 13 10:31:26 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 13 Mar 2007 07:31:26 -0700
Subject: glob.glob output
In-Reply-To: <45f5b0f7$0$9689$426a74cc@news.free.fr>
References: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
	<45f5b0f7$0$9689$426a74cc@news.free.fr>
Message-ID: <1173796286.625280.147230@c51g2000cwc.googlegroups.com>

On Mar 12, 4:33 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Hitesh a ?crit :
>
> > import string
> > import os
>
> > f = open ("c:\\servername.txt", 'r')
> > linelist = f.read()
>
> > lineLog = string.split(linelist, '\n')
> > lineLog = lineLog [:-1]
> > #print lineLog
> > for l in lineLog:
> >     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
> >     glob.glob(path1)
>
> And ? What are you doing then with return value of glob.glob ?
>
> BTW, seems like an arbitrarily overcomplicated way to do:
>
> from glob import glob
> source = open(r"c:\\servername.txt", 'r')
> try:
>    for line in source:
>      if line.strip():
>        found = glob(r"\\%s\server*\*\xtRec*" % line)
>        print "\n".join(found)
> finally:
>    source.close()
>
> > When I run above from command line python, It prints the output of
> > glob.glob
> > but when I run it as a script, it does not print
> > anything....
>
> Not without an explicit print statement. This behaviour is useful in the
> interactive python shell, but would be really annoying in normal use.
>
> > I know that there are files like xtRec* inside those
> > folders.. and glob.glob does spits the path if run from python command
> > line.
>
> > I tried something like this but did not work:
> > for l in lineLog:
> >     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
> >     xtRec = glob.glob(path1)
> >     print xtRec
>
> > No results...
>
> With the same source file, on the same filesystem ? Unless your xtRec*
> files have been deleted between both tests you should have something here.
>
> > xtRec = []
> > for l in lineLog:
> >     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
> >     xtrec = glob.glob(path1)
>
> You're rebinding xtRec each turn. This is probably not what you want.


Thank you for your reply.
>From the return value I am trying to figure out whether the file
xtRec* exist or not.
I am newbie so exuse my ignorance... still learning.
Somehow when I tried your solution, it takes 10mins to scan 200 plus
servers but when I tried my code, it takes less then 2 mins.
This is a puzzle for me, I gotta figure it out.

hj




From godzillaismad at gmail.com  Fri Mar 23 00:20:22 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 22 Mar 2007 21:20:22 -0700
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <mailman.5489.1174604164.32031.python-list@python.org>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
	<mailman.5449.1174564707.32031.python-list@python.org>
	<1174567006.244721.115890@n59g2000hsh.googlegroups.com>
	<zazMh.15244$tD2.5343@newsread1.news.pas.earthlink.net>
	<1174603221.600706.62210@p15g2000hsd.googlegroups.com>
	<mailman.5489.1174604164.32031.python-list@python.org>
Message-ID: <1174623622.426601.327640@o5g2000hsb.googlegroups.com>

On Mar 23, 9:50 am, Steve Holden <s... at holdenweb.com> wrote:
> Godzilla wrote:
> > On Mar 23, 4:38 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> >> On 22 Mar 2007 05:36:46 -0700, "Godzilla" <godzillais... at gmail.com>
> >> declaimed the following in comp.lang.python:
>
> >>> Steve, I think I've tried what you have suggested without any luck as
> >>> well... The statement works fine, but what inserted is not correct...
> >>> it seems like only the symbol '?' was inserted into the blob field...
> >>         You didn't have a set of 's around the ?, did you? Parameter
> >> substitution will add needed quotes on its own rather than you having to
> >> put in quotes.
>
> >>         Also, though I find no documentation on it, odbc module cursors have
> >> setinputsizes() and setoutputsizes() methods -- perhaps that could
> >> change things... OTOH: the db-api 1.0 PEP (which is, it seems, what odbc
> >> module follows) says they may be do-nothing methods.
> >> --
> >>         Wulfraed        Dennis Lee Bieber               KD6MOG
> >>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
> >>                 HTTP://wlfraed.home.netcom.com/
> >>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
> >>                 HTTP://www.bestiaria.com/
>
> > Everything seems to work fine right now... thanks all of you for
> > helping... Have a great day..
>
> Have you any idea what fixed the problem?
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com- Hide quoted text -
>
> - Show quoted text -

Hi Steve,

I guess Dennis and yourself pointed me to the right direction; no need
the 's around ? and also the parameter substitution requires tuple.
I.e.:

qry.execute("Insert into tBlob (data) values (?)",
(data.encode('hex'),))

Thanks again guys... it's been greatly appreciated by the team here as
well.



From rkmr.em at gmail.com  Mon Mar 19 00:58:33 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Sun, 18 Mar 2007 21:58:33 -0700
Subject: list comprehension help
In-Reply-To: <1hv6v32.17ahray13d45puN%aleax@mac.com>
References: <mailman.5246.1174234283.32031.python-list@python.org>
	<1174269687.497013.249480@o5g2000hsb.googlegroups.com>
	<1hv6v32.17ahray13d45puN%aleax@mac.com>
Message-ID: <e04d2e90703182158o61d067eatb5e6adf2a010ff5a@mail.gmail.com>

On 3/18/07, Alex Martelli <aleax at mac.com> wrote:
> George Sakkis <george.sakkis at gmail.com> wrote:
> > On Mar 18, 12:11 pm, "rkmr... at gmail.com" <rkmr... at gmail.com> wrote:
> > > I need to process a really huge text file (4GB) and this is what i
> > > need to do. It takes for ever to complete this. I read some where that
> > > "list comprehension" can fast up things. Can you point out how to do
> > > f = open('file.txt','r')
> > > for line in f:
> > >         db[line.split(' ')[0]] = line.split(' ')[-1]
> > >         db.sync()
> > You got several good suggestions; one that has not been mentioned but
> > makes a big (or even the biggest) difference for large/huge file is
> > the buffering parameter of open(). Set it to the largest value you can
> > afford to keep the I/O as low as possible. I'm processing 15-25 GB
> > files (you see "huge" is really relative ;-)) on 2-4GB RAM boxes and
> > setting a big buffer (1GB or more) reduces the wall time by 30 to 50%
> > compared to the default value. BerkeleyDB should have a buffering
> Out of curiosity, what OS and FS are you using?  On a well-tuned FS and

Fedora Core 4 and ext 3. Is there something I should do to the FS?

> OS combo that does "read-ahead" properly, I would not expect such
> improvements for moving from large to huge buffering (unless some other
> pesky process is perking up once in a while and sending the disk heads
> on a quest to never-never land).  IOW, if I observed this performance
> behavior on a server machine I'm responsible for, I'd look for
> system-level optimizations (unless I know I'm being forced by myopic
> beancounters to run inappropriate OSs/FSs, in which case I'd spend the
> time polishing my resume instead) - maybe tuning the OS (or mount?)
> parameters, maybe finding a way to satisfy the "other pesky process"
> without flapping disk heads all over the prairie, etc, etc.
>
> The delay of filling a "1 GB or more" buffer before actual processing
> can begin _should_ defeat any gains over, say, a 1 MB buffer -- unless,
> that is, something bad is seriously interfering with the normal
> read-ahead system level optimization... and in that case I'd normally be
> more interested in finding and squashing the "something bad", than in
> trying to work around it by overprovisioning application bufferspace!-)


Which should I do? How much buffer should I allocate? I have a box
with 2GB memory.
thanks!


From anton.vredegoor at gmail.com  Sat Mar 24 19:09:43 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sun, 25 Mar 2007 00:09:43 +0100
Subject: A better webpage filter
In-Reply-To: <mailman.5564.1174771701.32031.python-list@python.org>
References: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl>
	<mailman.5564.1174771701.32031.python-list@python.org>
Message-ID: <eu4g2t$5ss$1@news4.zwoll1.ov.home.nl>

Gabriel Genellina wrote:

> I use the Opera browser: http://www.opera.com
> Among other things (like having tabs for ages!):
> - enable/disable tables and divs (like you do)
> - enable/disable images with a keystroke, or only show cached images.
> - enable/disable CSS
> - banner supressing (aggressive)
> - enable/disable scripting
> - "fit to page width" (for those annoying sites that insist on using a  
> fixed width of about 400 pixels, less than 1/3 of my actual screen size)
> - apply your custom CSS or javascript on any page
> - edit the page source and *refresh* the original page to reflect your  
> changes
> 
> All of this makes a very smooth web navigation - specially on a slow  
> computer or slow connection.

Thanks! I forgot about that one. It does what I want natively so I will 
go that route for now. Still I think there must be some use for my 
method of filtering. It's just too good to not have some use :-) Maybe 
in the future -when web pages will add new advertisement tactics faster 
than web browser builders can change their toolbox or instruct their 
users. After all, I was editing the filter script on one screen and 
another screen was using the new filter as soon as I had saved it.

Maybe someday someone will write a GUI where one can click some radio 
buttons that would define what goes through and what not. Possibly such 
a filter could be collectively maintained on a live webpage with an 
update frequency of a few seconds or something. Just to make sure we're 
prepared for the worst :-)

A.


From parvini_navid at yahoo.com  Thu Mar  8 00:37:31 2007
From: parvini_navid at yahoo.com (Navid Parvini)
Date: Wed, 7 Mar 2007 21:37:31 -0800 (PST)
Subject: Exception
Message-ID: <117593.16069.qm@web54512.mail.yahoo.com>

Dear All,
   
  When an exception occurs in a Python Qt application and it is not caught,
an error message is printed to stderr and the control is given back
to the event handler (similar to the interactive Python session).
The resources allocated before the error occurred is not flushed, but
rather kept with the traceback information. The only way to release
these is to call sys.exc_clear(). Is there a way to force sys.exc_clear()
to be called automatically upon writing the error message?

  Thank you in advance.
  Navid

 
---------------------------------
The fish are biting.
 Get more visitors on your site using Yahoo! Search Marketing.
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From deets at nospam.web.de  Mon Mar 19 04:19:24 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 Mar 2007 09:19:24 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
Message-ID: <566vcfF27jlu4U1@mid.uni-berlin.de>

momobear schrieb:
> hi, I am puzzled about how to determine whether an object is
> initilized in one class, anyone could give me any instructions?
> here is an example code:
> 
> class coffee:
>          def  boil(self):
>                self.temp = 80
> 
> a = coffer()
> if a.temp > 60:
>      print "it's boiled"
> 
> in C++ language we must initilized a variable first, so there is no
> such problem, but in python if we don't invoke a.boil(), we will not
> get self.temp to be initilized, any way to determine if it's initilzed
> before self.temp be used.

You want boil to be called __init__, which is python's constructor name. 
Then it will be called in a statement like

a = coffee()

automatically.


Diez



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 17:58:18 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 07 Mar 2007 23:58:18 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <1173304097.821562.75060@t69g2000cwt.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
Message-ID: <45ef3b80$0$18249$426a34cc@news.free.fr>

Arnaud Delobelle a ?crit :
> On Mar 7, 8:52 pm, Larry Bates <lba... at websafe.com> wrote:
> [snip]
> 
>>Without knowing more about the functions and the variable it is somewhat
>>hard to tell what you are trying to accomplish.  If a, b, c are functions
>>that act on x when it is a different type, change to one function that
>>can handle all types.
> 
> 
> I'm not really thinking about this situation so let me clarify. Here
> is a simple concrete example, taking the following for the functions
> a,b,c I mention in my original post.
>   - a=int
>   - b=float
>   - c=complex
>   - x is a string
> This means I want to convert x to an int if possible, otherwise a
> float, otherwise a complex, otherwise raise CantDoIt.
> 
> I can do:
> 
> for f in int, float, complex:
>     try:
>         return f(x)
>     except ValueError:
>         continue
> raise CantDoIt
> 
> But if the three things I want to do are not callable objects but
> chunks of code this method is awkward because you have to create
> functions 

You have to write the "chunks of code" anyway, don't you ? So just 
adding a def statement above each chunk is not such a big deal.

Remember that you can define nested funcs, that will close over the 
namespace of the enclosing one, so you dont necessarily have to pollute 
the global namespace nor explicitly pass the whole environment to each 
of these functions.

Using the generic higher order func I proposed in a previous answer:

def maincode(tati, pouffin):
   def a():
     # some
     # code
     # here
     # that may raise
     return foo

   def b():
     # some
     # shorter chunk
     return bar

   def c():
     # yet
     # some
     # other
     # code
     return quux

   return trythese(a, b)()

Is it really less readable than:

def maincode(tati, pouffin):
   try:
     # some
     # code
     # here
     # that may raise
     return foo

   except_retry: # the missing(???) keyword you're after
     # some
     # shorter chunk
     return bar

   except_retry:
     # yet
     # some
     # other
     # code
     return quux

   else:
     raise CantDoIt


> simply in order to be able to loop over them (this is whay I
> was talking about 'abusing loop constructs').  Besides I am not happy
> with the other two idioms I can think of.
> 
> --
> Arnaud
> 


From pyalbert at gmail.com  Wed Mar  7 00:28:33 2007
From: pyalbert at gmail.com (Ros)
Date: 6 Mar 2007 21:28:33 -0800
Subject: How to check whether file is open or not
Message-ID: <1173245313.037991.89380@s48g2000cws.googlegroups.com>

There are 10 files in the folder. I wish to process all the files one
by one. But if the files are open or some processing is going on them
then I do not want to disturb that process. In that case I would
ignore processing that particular file and move to next file.

How can I check whether the file is open or not?

I tried os.stat and os.access but I am not getting the expected
results.
Also I checked in IO exceptions, IO error handler doesnt raise any
error if the file is open.
There are some options to check but they are platform dependent (works
only with unix)

Your help would be highly appreciated.

Thanks,
Ros



From kyosohma at gmail.com  Mon Mar 19 13:40:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 10:40:03 -0700
Subject: PythonCard or Dabo?
In-Reply-To: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
References: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
Message-ID: <1174326003.145538.113010@y80g2000hsf.googlegroups.com>

On Mar 19, 12:24 pm, Kevin Walzer <k... at codebykevin.com> wrote:
> I'm curious to know what others think of these two frameworks for
> building wxPython apps.
>
> PythonCard has been around longer, but its development seems to have
> slowed. The last release, 0.8.2, has been out for quite awhile now.
>
> Dabo is newer and seems to have gathered a lot of buzz.
>
> Anyone try both? What's your preference and why? Is one more robust than
> the other?
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

You might want to submit this to the wxpython news-group. They'll have
a lot more on-target responses and I've noticed that some of the Dabo
creators regularly contribute to that mailing list. Personally, I
haven't had much luck with either. Dabo has great tutorials on their
website, but for some reason, I can't get it to run on my PC.
PythonCard, on the other hand, is just not intuitive for me. I am
currently experimenting with XRC.

Mike



From slm_guzel at hotmail.com  Mon Mar 26 15:21:54 2007
From: slm_guzel at hotmail.com (gslm)
Date: 26 Mar 2007 12:21:54 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <1174859432.355892.110520@l77g2000hsb.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
	<eu6k3n$uk6$03$1@news.t-online.com>
	<1174857800.421722.218190@e65g2000hsc.googlegroups.com>
	<1174859432.355892.110520@l77g2000hsb.googlegroups.com>
Message-ID: <1174936914.909991.190870@d57g2000hsg.googlegroups.com>

On 26 Mart, 00:50, "Stephen Eilert" <spedr... at gmail.com> wrote:
> On Mar 25, 6:23 pm, "gslm" <slm_gu... at hotmail.com> wrote:
>
>
>
>
>
> > Please, can you read again?
> > Yes, I understand that in phyton interpreter, i can't call phyton
> > command.Thanks...
>
> > But how can i run '.py' files from this command line?I wanted to use
> > the phyton command for this.
>
> > When i click a py extended file, for example calendar.py in lib
> > directory, file opens, then suddenly close,except graphical ones.Why?
> > How can i see the results?
>
> > And where can i learn which library must i import for whic class?
>
> > Sorry, i ask much:(But after learning these starting knowledeges, i
> > read tutorials, manuals etc.
> > But now i haven't found my answers yet.
> > Regards...
>
> For god's sake. It's PYTHON, not PHYTON.
>
> Use IDLE and run your files from there. That way you won't have to
> mess with the hideous windows console.
>
> However, if you really want to use the windows console, keep in mind
> that it will always close automatically when the program ends. That is
> true for Python, C, whatever, unless it was open before. So, Start->run, type "cmd" then run python filename.py. If that does not work,
>
> it's because the path is not set correctly.
>
> And that's probably because you keep mispelling Python. See below:
>
> " But I'm sorry.I haven't understood what i must do for ruunnig phyton
> command.I delete path from proportiesof my computer.Then i open
> command line of phyton.But when i write phyton these view below:
> Traceback<most recent call last>:
> File "<stdin>"; line 1 in <module>
> NameError: name phyton is not defined "
>                 ^^^^^^^
>
> Obviously, "Phyton" will never be defined.
>
> Stephen- Al?nt?y? gizle -
>
> - Al?nt?y? g?ster -

Thanks to all of you!Sorry, I must be more careful!
You're right, my problem is of course this:writing the word python
wrong.
Now it's ok!Thanks again and again!



From suyuancn at gmail.com  Thu Mar 29 07:51:00 2007
From: suyuancn at gmail.com (Su Y)
Date: 29 Mar 2007 04:51:00 -0700
Subject: Weird behavior in search in a list
Message-ID: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>

hi all,
I can't understand how this code work, its behavior is really weird
for me...

I want find the first number in extend[] which is larger than num, so
I wrote:
def find(num):
    count=0
    for elem in extend:
        if elem<num:
            count+=1
    return count

I found that if extend[] is monotonous, like [1.1, 2.3, 3.2, 4.5,
5.6],
it works fine: find(4) returns 3, extend[3] is 4.5.
But, if extend[] is not monotonous, like [1.1, 2.3, 3.2, 4.5, 5.6,
4.6, 3.4, 2.1, 0.3],
find(4) returns 6, extend[6] is 3.4!

what's going on here? I really can't understand....



From bearophileHUGS at lycos.com  Fri Mar 30 13:52:23 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 30 Mar 2007 10:52:23 -0700
Subject: clean up html document created by Word
In-Reply-To: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
Message-ID: <1175277143.544579.263820@l77g2000hsb.googlegroups.com>

jd:
> I am looking for python code (working or sample code) that can take an
> html document created by Microsoft Word and clean it up (if you've
> never had to look at a Word-generated html document, consider yourself
> lucky ;-)  Alternatively, if you know of a non-python solution, I'd
> like to hear about it.

It's not an easy job, and it may require some manual editing, because
that html is the worst I have seen. You can use Tidy, there is a GUI
too, and you can use its suggestions to manually remove the offending
things, at the end Tidy is able to digest it, and return a cleaned up
html. But then you have just started, you need to process it even
more.

A solution is to avoid creating the Html in the first place, or to use
something more like Word 97 to create it. Dreamweaver too is able to
help with Word2000+ trashy html, but usually not enough.

If the structure of the Html document is simple enough, and assuming
you are using Windows, you can open it with Word, save it as RTF,
reopen it with Wordpad, save it again to remove some trash, and then
use something else (like Word 97, or maybe even Aracnophobia, etc) to
convert it to Html. Generally I've never found a really good way to
convert Rtf to a very good Html.

Bye,
bearophile



From pekka.niiranen at pp5.inet.fi  Tue Mar 20 15:53:38 2007
From: pekka.niiranen at pp5.inet.fi (Mr Pekka Niiranen)
Date: Tue, 20 Mar 2007 19:53:38 GMT
Subject: Daylight saving time question
Message-ID: <6ZWLh.307$rd5.176@read3.inet.fi>

Hi,

is it possible to get the two annual daylight saving times
(day, month and time) from Python by giving location
in some country/location string ("Europe/Finland" for example).

I need to ask country in program and calculate daylight
saving times for the next few years onwards somehow like this:

for y in range(2007, 2017):
	(m1,d1,t1,m2,d2,t2) = daylight_change_epochs("Finland")

-pekka-


From altudela at yahoo.com  Tue Mar 20 12:08:22 2007
From: altudela at yahoo.com (Alejandro)
Date: 20 Mar 2007 09:08:22 -0700
Subject: making objects with individual attributes!
Message-ID: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>

I have created a class:

class document:

    titre = ''
    haveWords = set()

    def __init__(self, string):

        self.titre = string

#########

doc1 = document('doc1')
doc2 = document('doc2')

doc1.haveWords.add(1)
doc2.haveWords.add(2)


print doc1.haveWords

# i get set([1, 2])


doc1 and doc are sharing attribute haveWords!
Why ??? there's a way to assign every objetc "document" a different
"set"



From kyosohma at gmail.com  Wed Mar 21 11:16:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 21 Mar 2007 08:16:09 -0700
Subject: replace illegal xml characters
In-Reply-To: <1174482222.951043.27070@y80g2000hsf.googlegroups.com>
References: <1174464899.057656.177410@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.09.39.56.10295@gmx.net>
	<1174482222.951043.27070@y80g2000hsf.googlegroups.com>
Message-ID: <1174490169.349613.70810@e65g2000hsc.googlegroups.com>

On Mar 21, 8:03 am, "killkolor" <gabriel.h... at gmail.com> wrote:
> > Does InDesign export broken XML documents?  What exactly is your problem?
>
> yes, unfortunately it does. it uses all possible unicode characters,
> though not all are alowed in valid xml (see link in the first post).
> in any way for my application i should be checking if the xml that
> comes in is valid and replace all non-valid characters. is there
> something out there to do this?

You might be able to use "Beautiful Soup":

http://www.crummy.com/software/BeautifulSoup/

There are also some good examples for parsing XML at
http://www.devarticles.com/c/a/XML/Parsing-XML-with-SAX-and-Python/

and the Dive Into Python site.


Mike



From request at timeinc.net  Sun Mar 25 16:14:08 2007
From: request at timeinc.net (Internet Technology Group)
Date: Sun, 25 Mar 2007 16:14:08 -0400 (EDT)
Subject: Returned mail: see transcript for details (1174853648)
Message-ID: <200703252014.l2PKE819020053@mail.timeinc.net>

----------------------------------------------------------|||--
Request Management System - Time Inc.
---------------------------------------------------------------

To confirm this message was intended to be created as a request
in the Internet Technology Group's Request Management System,
please reply to this message and type '/OK' (without the quotes)
as the text of your message. Do not retype your request and feel
free to delete the rest of this text from your reply.

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From sgeiger at ncee.net  Sat Mar 17 05:41:03 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Sat, 17 Mar 2007 04:41:03 -0500
Subject: No subject
In-Reply-To: <BAY124-W4390D360B0869706CB42B4F4700@phx.gbl>
References: <BAY124-W4390D360B0869706CB42B4F4700@phx.gbl>
Message-ID: <45FBB7AF.2030300@ncee.net>

Milton,

This isn't terribly elegant, but it gets the job done:

dirs = ['C:\Images', 'C:\Images\2006', 'C:\Images\2007', 'C:\Music', 
'C:\Files', 'C:\Software', 'C:\Software\Python', 'C:\Software\iTunes']     

exclude_list = 
['Software','Images']                                                                                                             


def foo(d):
    retval = d
    for item in exclude_list:
        if item in d:
            retval = False
    return retval

dirs = map(foo, dirs)
dirs = filter(bool, dirs)  # removes the Falses
print dirs


Milton Segura wrote:
> Hello, I'm trying to exclude files from a list using the following code:
>  
> for item in dirs:
>     if item.find('Software') > -1:
>         dirs.remove(item)
>     elif item.find('Images') > -1:
>         dirs.remove(item)
>  
> let's supose dirs = ['C:\Images', 'C:\Images\2006', 'C:\Images\2007', 
> 'C:\Music', 'C:\Files', 'C:\Software', 'C:\Software\Python', 
> 'C:\Software\iTunes']
>  
> For some reason.. it just won't exclude them.
> I'd like to know why and how to fix it.
> Thanks in advance.
> Milton
>
> ------------------------------------------------------------------------
> Explore the seven wonders of the world Learn more! 
> <http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE>

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From scott.daniels at acm.org  Sun Mar 18 19:21:14 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 18 Mar 2007 15:21:14 -0800
Subject: where function
In-Reply-To: <1174259087.255048.286170@l77g2000hsb.googlegroups.com>
References: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
	<1174258135.009452.192960@e1g2000hsg.googlegroups.com>
	<1174259087.255048.286170@l77g2000hsb.googlegroups.com>
Message-ID: <12vri9gno4ad54e@corp.supernews.com>

vorticitywolfe at gmail.com wrote:
> On Mar 18, 10:48 pm, bearophileH... at lycos.com wrote:
>> [...fine solutions to the problem as asked...]
> Thank you both, a little more cumbersome than I expected, but it does
> the job! Thanks!

The obvious simple near-equivalent is:

     data = range(33,99)
     print data.index(45)

And "generalized":
     data = [x % 9 for x in range(30)]
     result = []
     former = -1
     try:
         while True:
             former = data.index(3, former + 1)
             result.append(former)
     except ValueError:
         print result
     else:
         print 'Nothing found'

-- 
--Scott David Daniels
scott.daniels at acm.org


From vishal at veriwave.com  Mon Mar 12 14:31:53 2007
From: vishal at veriwave.com (Vishal Bhargava)
Date: Mon, 12 Mar 2007 11:31:53 -0700
Subject: Watching a file another app is writing
In-Reply-To: <et45vn$dto$1@gemini.csx.cam.ac.uk>
Message-ID: <200703121831.l2CIVtYK031471@nsa.veriwave.com>

What kind of file is it? CSV?

-----Original Message-----
From: python-list-bounces+vishal=veriwave.com at python.org
[mailto:python-list-bounces+vishal=veriwave.com at python.org] On Behalf Of
Jeremy Sanders
Sent: Monday, March 12, 2007 11:26 AM
To: python-list at python.org
Subject: Re: Watching a file another app is writing

Gordon Airporte wrote:

> I'm trying to find a way to take a file that another program has opened
> and writes to periodically, open it simultaneously in Python, and
> automatically update some of my objects in Python when the file is
> written to.
> I can open the file and manually readlines() from it to keep up to date,
> it's the automatic part I'm having trouble with. This is on Windows.

It occurs to me under Unix you could perhaps get your first program to write
to a "named pipe", which you 2nd program could read from. See

http://en.wikipedia.org/wiki/Named_pipe

Jeremy

-- 
Jeremy Sanders
http://www.jeremysanders.net/
-- 
http://mail.python.org/mailman/listinfo/python-list



From eight02645999 at yahoo.com  Mon Mar 19 21:38:50 2007
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 19 Mar 2007 18:38:50 -0700
Subject: an enumerate question
Message-ID: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>

hi
say i want to enumerate lines of a file
eg
for n,l in enumerate(open("file")):
     # print  next line ie

is there a way to print out the next line from current line using the
above?.
Or do i have to do a readlines() first to get it into a list eg
d = open("file").readlines()
for n, l in enumerate(d):
    print d[n+1]

thanks



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 10 20:46:34 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 02:46:34 +0100
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<1173548863.033277.223420@v33g2000cwv.googlegroups.com>
	<3kCIh.324910$IL1.184956@newsfe13.lga>
Message-ID: <55h5bqF258g2nU4@mid.individual.net>

hg wrote:
> Dan Bishop wrote:

>> def unsigned(n):
>>     return n & 0xFFFFFFFF
> 
> or abs(-1) ?

Nah! Bitwise operators are cool. ;)

Though ANDing won't make the int unsigned.

Regards,


Bj?rn

-- 
BOFH excuse #23:

improperly oriented keyboard



From steven.bethard at gmail.com  Mon Mar 19 22:52:16 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 19 Mar 2007 20:52:16 -0600
Subject: Passing arguments to a command line from a python script
In-Reply-To: <1174355637.450275.148340@l77g2000hsb.googlegroups.com>
References: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>
	<mailman.5313.1174350370.32031.python-list@python.org>
	<1174354958.815878.95020@d57g2000hsg.googlegroups.com>
	<1174355342.669635.302960@y80g2000hsf.googlegroups.com>
	<1174355637.450275.148340@l77g2000hsb.googlegroups.com>
Message-ID: <jfWdndO1v_vC0WLYnZ2dnUVZ_rzinZ2d@comcast.com>

Luis M. Gonz?lez wrote:
> On Mar 19, 10:49 pm, "zacherates" <zachera... at gmail.com> wrote:
>> This implies that `os.system("setuppy py2exe")` should do what you
>> want.
> 
> It works!
> Thank you, this is just what I wanted.

You'll get better error checking if instead you do::

     >>> import subprocess
     >>> subprocess.call(['setup.py', 'py2exe'])

Actually, you probably should really be doing::

     >>> subprocess.call(['python', 'setup.py', 'py2exe'])

so that you don't have to assume the OS knows how to run a .py file.

STeVe


From Graham.Dumpleton at gmail.com  Mon Mar 26 22:48:09 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: 26 Mar 2007 19:48:09 -0700
Subject: Python C extension providing... Python's own API?
In-Reply-To: <1174963301.590013.167030@r56g2000hsd.googlegroups.com>
References: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>
	<1174942538.061137.93130@r56g2000hsd.googlegroups.com>
	<1174957359.286188.178330@y66g2000hsf.googlegroups.com>
	<1174963301.590013.167030@r56g2000hsd.googlegroups.com>
Message-ID: <1174963689.414236.178540@r56g2000hsd.googlegroups.com>

On Mar 27, 12:41 pm, "Graham Dumpleton" <Graham.Dumple... at gmail.com>
wrote:
> On the other hand, it might be useful in a standalone Python based
> WSGI web server which you have more direct control over.  It might
> take a bit of design work as to how to do it in practice, but you
> could create different sub interpreters through the module for
> distinct WSGI applications. The main interpreter could be running the
> web server and somehow then hand off a WSGI environ etc off to a
> manager module in the other sub interpreter that then deals with
> communicating with the WSGI application in that sub interpreter for
> that specific request. You could conceivably have a hand off
> arrangement whereby when an application code base changes that you
> start routing requests for URL subset to new instance of application
> in new sub interpreter and kill off old sub interpreter when able to.
> Would certainly be an interesting area to look at. For mod_wsgi at
> least though I ruled out allowing sub interpreters to be killed off
> and allowing reloading of a complete application by such a handoff
> mechanism as too dangerous a feature in an ISP based web hosting
> environment as user code could too easily hang the Apache process when
> trying to kill off the sub interpreter.

One more thought. It would actually be quite cute if you could make
this whole encapsulation of pushing a WSGI request into a distinct sub
interpreter a WSGI middleware component. That way you could just drop
it into any existing web server infrastructure that supports WSGI. Now
I'm getting really interested to have a play. :-)

Graham



From AWasilenko at gmail.com  Fri Mar 23 23:11:35 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 23 Mar 2007 20:11:35 -0700
Subject: except clause appears to be being skipped?
In-Reply-To: <1174703392.857810.62030@n59g2000hsh.googlegroups.com>
References: <1174701061.474974.97710@y80g2000hsf.googlegroups.com>
	<1174703392.857810.62030@n59g2000hsh.googlegroups.com>
Message-ID: <1174705895.454045.293440@n76g2000hsh.googlegroups.com>

On Mar 23, 10:29 pm, "John Machin" <sjmac... at lexicon.net> wrote:
> It *is* "pulling up the 404 function", which *is* returning your error
> page. However all your except clause does is "self.err404(dex)" -- you
> ignore the return value, and fall out of the except clause with
> textfile undefined, with the expected consequences.

Humm I dident think had to put return when I called the 404 becuase
the def has a return on the end of that, but now that I think about it
more it makes sence.



>
> I'm not at all familiar with cherrypy, but you probably need to do
> either:
>     errpage = self.err404(dex)
>     dosomethingwith(errpage, dex)
>     return
> or simply:
>     return "404 page title", self.err404(dex)
> [Actually it would be better style if the err404 method returned a
> tuple of (pagetitle, pagebody), then your except clause contains
> only:
>     return self.err404(dex)

Both of you're suggestions worked, Change it to return the tuple.




>
> The main point being to return instead of falling through the bottom
> of the except clause. BTW, you should not use a bare except. Be a
> little more specific, like except IOError:

Suggestion implemented, I figured you could be more specific with
exceptions but I must have glazed over that in my book when I read
about it.




> Looking at the cherrypy docs would seem indicated.
Since I'm a noobie python'r (or programmer for that matter) most if
not all of my mistkaes are with python and the syntax, there is not
much to screw up with Cherrypy itself, but I'm sure I will find a way
to screw it up later :)

> AFAIK there was a
> v1 and a v2 with different naming conventions and there's now a v3 --
> do ensure that you mention which version you are using if you need to
> come back with more questions.
>
> HTH,
> John

Naming conventions eh?  I guess I'm following conventions so far, I
havent ran into that problem yet (Knock Knock)

Thanks for you're help John, people like you make these newsgroups are
an invaluable resource :)



From lobais at gmail.com  Mon Mar 26 10:50:33 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Mon, 26 Mar 2007 16:50:33 +0200
Subject: Sending ECHO_REQUEST (pinging) with python
References: <pan.2007.03.26.06.30.33@gmail.com>
	<mailman.5617.1174898513.32031.python-list@python.org>
	<slrnf0f9tl.ar4.nick@irishsea.home.craig-wood.com>
Message-ID: <pan.2007.03.26.14.50.50@gmail.com>

Den Mon, 26 Mar 2007 06:30:04 -0500 skrev Nick Craig-Wood:

> Michael Bentley <michael at jedimindworks.com> wrote:
>>  On Mar 26, 2007, at 1:30 AM, Thomas Dybdahl Ahle wrote:
>> > It seems however that I have to be root to send those imcp packages,
>> > but I guess there must be a workaround since I can easily use the
>> > "ping" command as ordinary user.
>> 
>>  The workaround your ping command is using btw, is probably running
>>  suid root.
> 
> Under linux the only priviledge you need is CAP_NET_RAW.  It is possible
> to give this to a process - a bit of searching with google will show you
> how!

How, I did google, but I wasn't able to find any way to do this in 
python..


From JHoover at fbi.gov  Mon Mar 12 15:33:28 2007
From: JHoover at fbi.gov (Gordon Airporte)
Date: Mon, 12 Mar 2007 15:33:28 -0400
Subject: Watching a file another app is writing
In-Reply-To: <mailman.4957.1173689984.32031.python-list@python.org>
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>	<1173676363.653940.133030@30g2000cwc.googlegroups.com>	<vu-dnXYa49qinWjYnZ2dnUVZ_viunZ2d@comcast.com>
	<mailman.4957.1173689984.32031.python-list@python.org>
Message-ID: <0YSdnQ1Q3MYUN2jYnZ2dnUVZ_h-vnZ2d@comcast.com>

Gabriel Genellina wrote:
  > This article explains it in detail:
> http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html 
> 
> BTW, it's the top result on Google for "python notify file change windows"
> 
> --Gabriel Genellina

Ah, excelent. Thank you. I'd started with the pywin32 documentation, 
where I did manage to find FindFirstChangeNotification(). I had to go to 
bed before I could get to Google to figure out how to use it.
Having just tested it, it seems that my problem is now caching. These 
only trigger when the file is written to disk, and for the small amounts 
of data I'm dealing with that's not with every transaction.
This is probably why tail wasn't working for me either, with the added 
complication of it locking the file.


From jaywgraves at gmail.com  Mon Mar 26 16:51:42 2007
From: jaywgraves at gmail.com (jay graves)
Date: 26 Mar 2007 13:51:42 -0700
Subject: fetch html page via isa proxy
In-Reply-To: <1174930197.366764.102320@y66g2000hsf.googlegroups.com>
References: <1174930197.366764.102320@y66g2000hsf.googlegroups.com>
Message-ID: <1174942302.782922.85730@r56g2000hsd.googlegroups.com>

On Mar 26, 12:29 pm, "Radek" <radek.sv... at gmail.com> wrote:
> I have tried setting http_proxy environment, played with proxy
> openers, use ntlm proxy server all without success.

So you have already tried NTLM Authorization Proxy Server?
http://ntlmaps.sourceforge.net/
This used to work fine for me but that was at least 3-4 years ago.


> I can get the page using Firefox and IE with proxy settings.

To use tools like 'ftp','filezilla' and 'wget' I've installed the 'ISA
Firewall Client' from Microsoft.

http://www.google.com/search?q=firewall+client

But a quick test of trying to get python.org with 'urllib' did not
work.

> Any advice? Or better working example?
> Thanks a lot,

Sorry I wasn't able to help more.  I'll try to poke at it a bit more
when I get a chance.

...
Jay Graves



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 14 08:28:45 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 13:28:45 +0100
Subject: Quick Filter Dictionary
In-Reply-To: <1173872598.381107.182520@y66g2000hsf.googlegroups.com>
References: <1173871745.698892.189470@n76g2000hsh.googlegroups.com>
	<1173872598.381107.182520@y66g2000hsf.googlegroups.com>
Message-ID: <45f7ea66$0$9713$426a34cc@news.free.fr>

abcd a ?crit :
> On Mar 14, 7:29 am, "abcd" <codecr... at gmail.com> wrote:
>> Hi,
>>    I have a dictionary which may contain various keys/values, however,
>> it will always contain 'name' and 'age' keys.
>>
>>    This dictionary is kept inside a class, such as....
>>
>>     class Person:

Do yourself a favor : use new-style classes:
        class Person(object):

>>         def __init__(self, name, age):
>>             self.data = {'name' : name, 'age' : age}

You may improve this part with kwargs:

          def __init__(self, name, age, **kw):
              kw.update(name=name, age=age)
              self.data = kw

Also, and FWIW, object attributes are stored in self.___dict__. Do you 
have a compelling reason to use yet another 'data' dict ?

>>         def getData(self, includeNameAge=False):
>>             if includeNameAge: return self.data
>>             tmp = <shallow or deep copy of 'data'>
                tmp = self.data.copy()
>>             del tmp['name']
>>             del tmp['age']
>>             return tmp

The problem with this implementation (as well as for the other below) is 
that in the first case you return a reference to the data dict itself, 
while in the second case you return a new dict.

p = Person('bibi', 42, foo='bar')
data = p.getData(True)
data['baaz'] = 'quux'
del data['name']
print p.data

p = Person('bibi', 42, foo='bar')
p.getData()
data['baaz'] = 'quux'
del data['foo']
print p.data

Better to *always* return a copy IMHO.


From hg at nospam.org  Fri Mar  9 08:45:59 2007
From: hg at nospam.org (hg)
Date: Fri, 09 Mar 2007 14:45:59 +0100
Subject: floating point rounding
References: <DOiIh.135$TK5.124@newsfe13.lga>
Message-ID: <uHjIh.21006$oJ1.746@newsfe18.lga>

hg wrote:

> Hi,
> 
> Here is my issue:
> 
> f = 1.5 * 0.01
> f
>>> 0.014999999999999999
> '%f' % f
>>>'0.015000'
> 
> 
> But I really want to get 0.02 as a result ... is there a way out ?
> 
> Thanks,
> 
> hg

round



From alet at librelogiciel.com  Mon Mar 19 13:30:30 2007
From: alet at librelogiciel.com (Jerome Alet)
Date: Mon, 19 Mar 2007 18:30:30 +0100
Subject: [ANNOUNCE] Boxtream v0.991 is out
Message-ID: <pan.2007.03.19.17.25.52.633324@librelogiciel.com>

Hi there,

I'm pleased to announce the immediate availability of Boxtream v0.991

Boxtream is a mobile audio/video recording and streaming studio, made from
a set of optional hardware bricks and of a Python written, GNU GPLed,
GStreamer based software.

The software part can be used without most of the hardware, although
having hardware similar to the one used will offer more options (support
for Extron and soon Kramer A/V switchers, for example).

The Boxtream software is made of an headless encoding backend which
publishes its API over XML-RPC, and from a GUI frontend made with wxPython.

Boxtream is mostly used to record and stream compressed video of live
events like congresses, presentations, courses and so on, with or
without synchronized slides, while at the same time saving the original
audio and video sources in the native DV format, allowing postprocessing
with any tool of your choice.

Five encoding schemes are currently available, each in a set of
framerates, sizes, audio frequency,or number of audio channels, but adding
new schemes is easy, and will become even easier in future releases.

More details, screenshot, and download from the following (temporary)
website :

  http://cortex.unice.fr/~jerome/boxtream/

Please report bugs or send comments to : alet at unice.fr



From bj_666 at gmx.net  Sat Mar 10 04:16:15 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 10 Mar 2007 10:16:15 +0100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.10.09.16.14.805993@gmx.net>

In <1173515984.515050.27400 at n33g2000cwc.googlegroups.com>, Raymond
Hettinger wrote:

> On Mar 9, 7:32 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> In <1173453432.893222.308... at j27g2000cwj.googlegroups.com>, cesco wrote:
>> > Given two positive integers, N and M with N < M, I have to generate N
>> > positive integers such that sum(N)=M. No more constraints.
>>
>> Break it into subproblems.  Generate a random number X from a suitable
>> range and you are left with one number, and the problem to generate (N-1)
>> random numbers that add up to (M-X).
> 
> This approach skews the probabilities.  The OP said for example with
> N=5 and M=50 that a possible solution is [3, 11, 7, 22, 7].  You're
> approach biases the probabilities toward solutions that have a large
> entry in the first position.

I know but he said also "No more constraints".  And?
 
> To make the solutions equi-probable, a simple approach is to
> recursively enumerate all possibilities and then choose one of them
> with random.choice().

?it would be faster than creating all possibilities.  :-)

Ciao,
	Marc 'BlackJack' Rintsch


From mnations at gmail.com  Mon Mar  5 12:39:42 2007
From: mnations at gmail.com (Mudcat)
Date: 5 Mar 2007 09:39:42 -0800
Subject: Python stock market analysis tools?
In-Reply-To: <1173102924.803537.89930@c51g2000cwc.googlegroups.com>
References: <1173066776.884126.86810@64g2000cwx.googlegroups.com>
	<1173073290.907489.101150@t69g2000cwt.googlegroups.com>
	<1173102924.803537.89930@c51g2000cwc.googlegroups.com>
Message-ID: <1173116381.861662.83600@s48g2000cws.googlegroups.com>

On Mar 5, 7:55 am, "Beliavsky" <beliav... at aol.com> wrote:

> Yes, and a discussion of investment approaches would be off-topic.
> Unfortunately, newsgroups such as misc.invest.stocks are dominated by
> spam -- the moderated newsgroup misc.invest.financial-plan is better.
>
> Some research says that "mean variance portfolio optimization" can
> give good results. I discussed this in a message
>

I actually checked out some of those newsgroups in trying to find a
tool to use. I think I even posted a question about it. But you're
right in that there's so much spam, and all of the responses I got
were people trying to hock their own wares. Didn't find much in the
way of useful information.




From rdm at rcblue.com  Tue Mar 13 11:12:17 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 13 Mar 2007 08:12:17 -0700
Subject: number generator
In-Reply-To: <et6al4$2to$1@news1.zwoll1.ov.home.nl>
References: <mailman.5016.1173790665.32031.python-list@python.org>
	<et6al4$2to$1@news1.zwoll1.ov.home.nl>
Message-ID: <20070313151220.C45EB1E4012@bag.python.org>

At 06:59 AM 3/13/2007, Anton Vredegoor wrote:
>Dick Moores wrote:
>
> > If the added constraint is instead that the probability of generating
> > a given list of length N be the same as that of generating any other
> > list of length N, then I believe my function does the job. Of course,
> > [1,46,1,1,1] and [1,1,46,1,1], as Python lists, are distinct. I ran
> > this test for M == 8 and N == 4:
>
>Yes, I believe your function is OK. But the 'fencepost' method posted
>earlier in this thread also does this and it's faster AND it's only two
>line of code ...

Yes, I tested that after posting mine. Paul Rubin's fencepost method 
is about 14 times faster than mine for the same M == 8 and N == 4!  :(

> > A = []
> > B = []
> > for x in range(100000):
> >      lst = sumRndInt(8,4)
> >      if lst not in A:
> >          A.append(lst)
> >          B.append(1)
> >      else:
> >          i = A.index(lst)
> >          B[i] += 1
> >
> > A.sort()
>
>Doesn't sorting break the correspondence between A and B?

Yes, but I thought that it would be easier to see that all the 
permutations are represented. It seemed clear enough that with larger 
num, all counts would approach num/35..

>  Also, a more
>pythonic way to count would be to convert the lst into a tuple and then
>do something with a dictionary. Dictionaries have faster lookup. For
>example:
>
>T = tuple(lst)
>D[T] = D.get(T,0) + 1
>
>in the loop in order to count the occurrences.

Sorry, I don't understand this. Could you spell it out for me by 
rewriting my above test to use it? Thanks!

Dick Moores




From kyosohma at gmail.com  Tue Mar 20 12:04:41 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 09:04:41 -0700
Subject: Wanted: a python24 package for Python 2.3
In-Reply-To: <45FFFEB6.2080403@pytex.org>
References: <45FFFEB6.2080403@pytex.org>
Message-ID: <1174406681.405930.237930@e1g2000hsg.googlegroups.com>

On Mar 20, 10:33 am, Jonathan Fine <j... at pytex.org> wrote:
> Hello
>
> My problem is that I want a Python 2.4 module on
> a server that is running Python 2.3.  I definitely
> want to use the 2.4 module, and I don't want to
> require the server to move to Python 2.4.
>
> More exactly, I am using subprocess, which is
> new in Python 2.4.  What I am writing is something
> like
> ===
> from subprocess import Popen
> ===
>
> This will fail in Python 2.3, in which case I
> would like to write something like
> ===
> try:
>      from subprocess import Popen
> else ImportError:
>      from somewhere_else import Popen
> ===
>
> Put this way, it is clear (to me) that somewhere_else
> should be python24.
>
> In other words, I'm asking for a python24 package that
> contains all (or most) of the modules that are new to
> Python 2.4.
>
> I've looked around a bit, and it seems that this
> formulation of the solution is new.  I wonder if
> anyone else has encountered this problem, or has
> comments on my solution.
>
> --
> Jonathan

You might be able to use the "from future import SomeModule" syntax to
accomplish this, but I am not sure. Other than that, I would just
recommend using the os.popen calls that are native to 2.3

Mike



From claird at lairds.us  Wed Mar 21 22:07:50 2007
From: claird at lairds.us (Cameron Laird)
Date: Thu, 22 Mar 2007 02:07:50 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
	<yPcMh.12121$PL.6911@newsread4.news.pas.earthlink.net>
Message-ID: <m059d4-b14.ln1@lairds.us>

In article <yPcMh.12121$PL.6911 at newsread4.news.pas.earthlink.net>,
Dennis Lee Bieber  <wlfraed at ix.netcom.com> wrote:
>On Wed, 21 Mar 2007 15:32:17 +0000, Tom Wright <tew24 at spam.ac.uk>
>declaimed the following in comp.lang.python:
>
>> 
>> True, but why does Python hang on to the memory at all?  As I understand it,
>> it's keeping a big lump of memory on the int free list in order to make
>> future allocations of large numbers of integers faster.  If that memory is
>> about to be paged out, then surely future allocations of integers will be
>> *slower*, as the system will have to:
>> 
>	It may not just be that free list -- which on a machine with lots of
>RAM may never be paged out anyway [mine (XP) currently shows: physical
>memory total/available/system: 2095196/1355296/156900K, commit charge
>total/limit/peak: 514940/3509272/697996K (limit includes page/swap file
>of 1.5GB)] -- it could easily just be that the OS or runtime just
>doesn't return memory to the OS until a process/executable image exits.
			.
			.
			.
... and there *are* (or at least have been) situations where
it was profitable for an application which knew it had finished
its memory-intensive work to branch to a new instance of itself
in a smaller memory space.  That's the only, and necessarily
"tricky", answer to the question about how to make sure all that
free stuff gets back to the OS.


From tjreedy at udel.edu  Wed Mar 28 12:25:25 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 28 Mar 2007 12:25:25 -0400
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com><1174916449.171929.138950@n76g2000hsh.googlegroups.com><pan.2007.03.26.22.17.16.194451@REMOVE.THIS.cybersource.com.au>
	<2e4k03l8tj9oicmn8c21vobrnvkmdstabr@4ax.com>
Message-ID: <eue4tl$s12$1@sea.gmane.org>


"Tim Roberts" <timr at probo.com> wrote in message 
news:2e4k03l8tj9oicmn8c21vobrnvkmdstabr at 4ax.com...
| Well, I'm being a bit argumentative here, but it's hard to deny that the
| use of "compiled" in the context of .pyc (or .javac) is very different 
from
| the use of "compiled" in the context of running gcc.

Besides the fact that the object code does not corresponded to the public 
interface of any *current* processor, the compilation process is quite 
similar.  Linear source code is parsed using standard techniques to produce 
a syntax tree.  The tree is walked to produce object code in a different 
language.  A certain amount of optimization is done.

For instance, CPython compiles a 'while ' statement to a conditional jump 
past the end before the body and an absolute jump to the begining at the 
end.  I am quite sure that gcc does essentially the same thing.  If CPython 
(by 2.4, at least) recognizes the condition as a constant whose Bool value 
is True, it removes (optimizes away) the loading of the constant and the 
conditional jump that would never happen.  Again, this is the same as gcc 
will do, I am sure, with at least some flag settings.

| Once upon a time,
| Basic enthusiasts would have used the word "tokenized" to describe .pyc 
files.

Perhaps, but they would, I think, have been wrong.  Tokenized Basic to the 
best of my knowledge, is a reversibly compressed version of the source 
file.  The 'while' keyword, is there is one, is replaced by a number, but 
no parsing is done.

Terry Jan Reedy





From lbrooks at mit.edu  Mon Mar 19 11:54:56 2007
From: lbrooks at mit.edu (Lane Brooks)
Date: Mon, 19 Mar 2007 11:54:56 -0400
Subject: Embedding and undefined symbols
Message-ID: <45FEB250.8030200@mit.edu>

I am embedding python into a linux shared library (let's call it 
libembedpy.so).

The main application loads this shared library dynamically using libdl 
and is not linked against libembedpy.so

Under this scenerio, I get ImportErrors when I try import modules:

   File "test.py", line 3, in ?
     import time
ImportError: /usr/lib64/python2.4/lib-dynload/timemodule.so: undefined 
symbol: PyExc_ValueError



By building a simple test case, I can make this error go away if the 
main application links against the shared library libembedpy.so.  For 
the real case, however, I do not have access to the source, so I cannot 
relink it.

Any ideas of how to get rid of this problem?

Thanks,
Lane


From rocky.bernstein at gmail.com  Thu Mar 29 08:16:02 2007
From: rocky.bernstein at gmail.com (rocky.bernstein at gmail.com)
Date: 29 Mar 2007 05:16:02 -0700
Subject: Python automatic testing: mocking an imported module?
In-Reply-To: <1175044402.266098.185010@y80g2000hsf.googlegroups.com>
References: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
	<1175044402.266098.185010@y80g2000hsf.googlegroups.com>
Message-ID: <1175170562.089901.90860@o5g2000hsb.googlegroups.com>

On Mar 27, 9:13 pm, "Chris Lasher" <chris.las... at gmail.com> wrote:
> On Mar 27, 6:18 pm, "Silfheed" <silfh... at gmail.com> wrote:
>
> > Heyas
>
> > So we have the following situation: we have a testee.py that we want
> > to automatically test out and verifiy that it is worthy of being
> > deployed.  We want our tester.py to test the code for testee.py
> > without changing the code for testee.py.  testee.py has a module in it
> > that we want to mock in some tests and in others use the real module.
>
> I think you mean "testee.py *imports* a module", rather than "has a
> module in it". Semantics but I was thrown off by this at first.
>
> Why not write tests for the module that testee.py imports (here called
> "foo.py")? If you write out the tests and foo.py passes to spec, then
> you should feel confident it will work correctly with testee.py. Never
> trust it; always play paranoid coder, but feel comfortable enough
> using it.
>
> After all, why should you feel comfortable using modules in the
> standard library? Nobody guarantees bugs don't still lurk in there
> (heck, c.l.p just found one inpdbtoday),

A slight correction. At present it looks like the bug is in Python,
and its handling after setting the current frame's f_lineno when it
refers to byte code offset 0, not pdb. And if you scan c.l.p for
another oddity in pdb with respect to tracebacks, there is possibly
another bug in Python (not strictly pdb).

> however, they have unit
> tests out the wazzoo that demonstrate, to the best of our knowledge,
> the module works to spec.

Actually, as far as I know pdb *doesn't* have any unit tests! (pydb
does though ;-)

But all this nit-picking aside, I do agree with what you have to say
most whole heartedly. (And I'd say maybe a couple more unit tests for
Python to cover these bugs are in order.)

> If that approach is good enough for the
> standard library, wouldn't it be good enough for you?
>
> Chris




From mail at microcorp.co.za  Thu Mar 29 01:29:35 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 29 Mar 2007 07:29:35 +0200
Subject: socket read timeout
References: <U39Oh.178798$BK1.144837@newsfe13.lga><eub6un$k3d$3@nemesis.news.tpi.pl><mailman.5668.1175003334.32031.python-list@python.org><VegOh.15507$nh4.13055@newsfe20.lga><mailman.5688.1175034299.32031.python-list@python.org><MukOh.12989$Ng1.10639@newsfe19.lga>
	<17930.25631.86693.827473@montanaro.dyndns.org>
Message-ID: <000e01c771d2$2f3dd240$03000080@hendrik>

 <skip at p....x.com> wrote:


> 
>     hg> My issue with that is the effect on write: I only want a timeout on
>     hg> read ...  but anyway ...
> 
> So set a long timeout when you want to write and short timeout when you want
> to read.
> 

Are sockets full duplex?

I know Ethernet isn't.

- Hendrik




From newsuser at stacom-software.de  Tue Mar  6 03:17:17 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Tue, 06 Mar 2007 09:17:17 +0100
Subject: Howto pass exceptions between threads
In-Reply-To: <%XYGh.7209$re4.2013@newssvr12.news.prodigy.net>
References: <esgo77$t6e$1@online.de>
	<%XYGh.7209$re4.2013@newssvr12.news.prodigy.net>
Message-ID: <esj7u9$fuh$1@online.de>

John Nagle schrieb:
> Alexander Eisenhuth wrote:
>> Hallo Alltogether,
>>
>> I've searched in this mailing list, but it seems to me that there is 
>> no general approach to pass exceptions from one thread to another.
> 
>    Very few languages have that.
> 
>    Actually, it could be made to work for Python, but it would have to
> be carefully designed.  Something that raises an exception in another
> thread the next time the thread blocks would have relatively sane
> semantics.  You couldn't raise an exception on a compute-bound thread,
> only at block points (locks, I/O, long system calls.)
> 
>                     John Nagle

Yes you're right, it must be well designed with a clear responsibility 
delegation. I can imgagine the following points:

- Thread termination with termination handler (for Thread instance)
- Main Thread information / synchronisation
- Default/Customized main thread exception handler


From lbates at websafe.com  Wed Mar 14 09:49:55 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 14 Mar 2007 08:49:55 -0500
Subject: IronPython and COM Interface
In-Reply-To: <1173876334.993319.34430@n59g2000hsh.googlegroups.com>
References: <1173876334.993319.34430@n59g2000hsh.googlegroups.com>
Message-ID: <45F7FD83.8080605@websafe.com>

Divya wrote:
> Hello,
> 
> I'm new to IronPython and COM so please bear with me.
> 
> I have a COM interface provided to me. I need to implement this
> interface and pass it to a method as a way of implementing
> 'callbacks'.
> 
> However it appears that the methods of my interface object are never
> called.
> 
> As a alternative, I implemented the interface in C# and then extended
> the C# class in IronPython. However, on running the code, methods of
> my C# class rather than the IronPython class are being called.
> 
> Can anyone advise? Is this possible in IronPython?
> 
> The code is listed below.
> 
> Regards,
> Divya
> 
> ---------------------------
> 
> import time
> 
> import clr
> clr.AddReference('Interop.MBTCOMLib.dll')
> clr.AddReference('Interop.MBTORDERSLib.dll')
> clr.AddReference('Interop.MBTQUOTELib.dll')
> 
> import MBTCOMLib
> import MBTORDERSLib
> import MBTQUOTELib
> 
> demo_user='user'
> demo_pass='pass'
> demo_host=9
> 
> class MBEvents(MBTQUOTELib.IMbtQuotesNotify):
> 	def __init__(self):
> 		MBTQUOTELib.IMbtQuotesNotify.__init__(self)
> 
> 	def OnLevel2Data(data):
> 		print 'OnLevel2Data'
> 
> 	def OnOptionsData(self, data):
> 		print 'OnOptionsData'
> 
> 	def OnQuoteData(self, data):
> 		print 'OnQuoteData'
> 
> 	def OnTSData(self, data):
> 		print 'OnTSData'
> 
> class MB:
> 	def __init__(self):
> 		self.conn = MBTCOMLib.MbtComMgrClass()
> 		#self.conn.EnableSplash(False)
> 		self.orders = self.conn.OrderClient
> 		self.quotes = self.conn.Quotes
> 		self.events = MBEvents()
> 
> 	def login(self, host=demo_host, user=demo_user, passwd=demo_pass):
> 		self.conn.DoLogin(host, user, passwd, '')
> 		print self.quotes.RemoteAddress, self.quotes.RemotePort
> 		self.quotes.AdviseSymbol(self.events, 'EUR/USD', 1|2|3|4)
> 

It may not help but I was struggling with the COM-callback issue
yesterday and found that this works in regular python:

import win32com.server.util

def callback:
    _public_methods_=['progress']
    def progress(self, total, number):
        print "completed %i of %i" % (number, total)

#
# Get instance of callback class
#
cb=callback()
#
# Wrap the callback class to turn it into an IDispatch (COM) object
# so I can pass it to my COM object.
#
idCallback=win32com.server.util.wrap(cb)
#
# Call the COM interface and pass it the callback function
#
r=oC.WSset_callback(idCallback)

In my case the COM object was also written in Python so to get
to the python object I do following:

def WSset_callback(idCallback)
    self.callback=win32com.client.Dispatch(idCallback)

Now I can call .progress method of callback class from the COM
object.

    self.callback.progress(total, number)

Hope this helps in some way.

-Larry


From kyosohma at gmail.com  Tue Mar 20 16:05:51 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 13:05:51 -0700
Subject: Daylight saving time question
In-Reply-To: <6ZWLh.307$rd5.176@read3.inet.fi>
References: <6ZWLh.307$rd5.176@read3.inet.fi>
Message-ID: <1174421151.709160.9390@e65g2000hsc.googlegroups.com>

On Mar 20, 2:53 pm, Mr Pekka Niiranen <pekka.niira... at pp5.inet.fi>
wrote:
> Hi,
>
> is it possible to get the two annual daylight saving times
> (day, month and time) from Python by giving location
> in some country/location string ("Europe/Finland" for example).
>
> I need to ask country in program and calculate daylight
> saving times for the next few years onwards somehow like this:
>
> for y in range(2007, 2017):
>         (m1,d1,t1,m2,d2,t2) = daylight_change_epochs("Finland")
>
> -pekka-

I recommend you read this article about using the dateutil module:

http://labix.org/python-dateutil

I can't remember, but I think this one might have a slightly more
restrictive license than other modules. Be sure to check that as well.
The "tzoffset type" is probably what you need

Mike



From aleax at mac.com  Sat Mar 10 10:50:25 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 10 Mar 2007 07:50:25 -0800
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
	<slrnev2q3q.cis.mandus@oro.simula.no> <d2fIh.4$iC.1@newsfe22.lga>
	<mailman.4872.1173474874.32031.python-list@python.org>
	<2iqIh.2485$_R.1335@newsfe23.lga>
Message-ID: <1hur1j5.z48dc31e9f268N%aleax@mac.com>

hg <hg at nospam.org> wrote:
   ...
> target but rather C: I need to integrate a printer driver and and would
> like if possible to avoid all of the .h stuff involved with SWIG (I am not
> being sarcastic): if I can setup my prototypes directly in python, why go
> through an extra layer ?
> 
> Aren't ctypes better suited to such an application ?

One advantage of solutions generating C code that gets compiled (SWIG,
Pyrex, writing C-API code directly, etc) is that the C compiler can warn
you, or produce compile-time mistakes, for many kinds of programming
errors; with ctypes, you will instead be finding every such error at
runtime, each time by noticing that Python crashed and facing a
substantial amount of debugging and code inspection to find out why.


Alex


From nagle at animats.com  Wed Mar  7 16:15:47 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 07 Mar 2007 21:15:47 GMT
Subject: Debugging segmentation faults
In-Reply-To: <1173300944.602217.194030@j27g2000cwj.googlegroups.com>
References: <1173294934.182507.116790@h3g2000cwc.googlegroups.com>
	<1173300944.602217.194030@j27g2000cwj.googlegroups.com>
Message-ID: <7YFHh.5597$M65.1613@newssvr21.news.prodigy.net>

    You're using Python on a web server to do something
complicated.  You must suffer.

    Are you trying to fork off a subprocess in a multithreaded
program?  That's unlikely to work.  The sematics differ
from OS to OS (Solaris forks all the threads, most other
operating systems don't; most UNIX-based OSs copy all the
open file descriptors, but some give you control of which
open files are passed), and Python may not be thread-safe
in that area.

				John Nagle

SPE - Stani's Python Editor wrote:
> If the error is reproducable and you can run wxPython, you could use
> the excellent WinPdb debugger, which ships with SPE (python editor):
> http://www.digitalpeers.com/pythondebugger/
> 
> ... but if you can only run your script on a remote server this won't
> help you.
> 
> Stani
> 
> --
> SPE - http://pythonide.stani.be
> 
> On 7 Mrz., 20:15, "George Sakkis" <george.sak... at gmail.com> wrote:
> 
>>I have a pure python program (no C extensions) that occasionally core
>>dumps in a non-reproducible way. The program is started by a (non-
>>python) cgi script when a form is submitted. It involves running a
>>bunch of other programs through subprocess in multiple threads and
>>writing its output in several files. So the only suspicious parts I
>>can think of is subprocess and/or multithreading. For the
>>multithreading part I'm using a modified version of threadpool.py
>>(http://www.chrisarndt.de/en/software/python/threadpool/), which is
>>built on top of the threading and Queue stdlib modules. Whatever bugs
>>may linger there, I'd hope that they would show up as normal Python
>>exceptions instead of segfaults.
>>
>>All I have now is a few not particularly insightful core files (actual
>>path names and args changed for privacy):
>>
>>/home/gsakkis/foo>gdb --core core.20140
>>GNU gdb Red Hat Linux (5.2-2)
>>Copyright 2002 Free Software Foundation, Inc.
>>GDB is free software, covered by the GNU General Public License, and
>>you are
>>welcome to change it and/or distribute copies of it under certain
>>conditions.
>>Type "show copying" to see the conditions.
>>There is absolutely no warranty for GDB.  Type "show warranty" for
>>details.
>>This GDB was configured as "i386-redhat-linux".
>>Core was generated by `python2.5 /home/gsakkis/foo/foo.py --XXX --
>>max=30 --bar=/tmp/83840`
>>Program terminated with signal 11, Segmentation fault.
>>#0  0x080b222d in ?? ()
>>(gdb) backtrace
>>#0  0x080b222d in ?? ()
>>#1  0x080b28d1 in ?? ()
>>#2  0x080fa8ab in ?? ()
>>#3  0x0805c918 in ?? ()
>>(...)
>>#28 0x080b310f in ?? ()
>>#29 0x080dbfdd in ?? ()
>>#30 0x40021fef in ?? ()
>>
>>Any hints ?
> 
> 
> 


From psaroudakis at gmail.com  Tue Mar 27 08:01:19 2007
From: psaroudakis at gmail.com (psaroudakis at gmail.com)
Date: 27 Mar 2007 05:01:19 -0700
Subject: SPE question
In-Reply-To: <mailman.5665.1174994903.32031.python-list@python.org>
References: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
	<1174991839.417993.295570@y80g2000hsf.googlegroups.com>
	<mailman.5665.1174994903.32031.python-list@python.org>
Message-ID: <1174996878.984641.246640@o5g2000hsb.googlegroups.com>

I believe that just deleting the folders should work....

Dick Moores wrote:
> At 03:37 AM 3/27/2007, irstas at gmail.com wrote:
> >On Mar 27, 11:39 am, "alain" <alainpo... at yahoo.fr> wrote:
> > > Hi,
> > >
> > > Could someone tell me how to uninstall SPE under windows?
> > >
> > > Alain
> >
> >Dunno about SPE, but most Python modules I've installed can
> >be uninstalled from control panel/add remove programs.
>
> SPE doesn't show up on my win XP add/remove programs list.
>
> Dick Moores



From MonkeeSage at gmail.com  Sat Mar 10 20:26:13 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 17:26:13 -0800
Subject: Help controlling CDROM from python
In-Reply-To: <1173564719.644165.38990@8g2000cwh.googlegroups.com>
References: <mailman.4902.1173538866.32031.python-list@python.org>
	<1173564719.644165.38990@8g2000cwh.googlegroups.com>
Message-ID: <1173576373.195976.24480@30g2000cwc.googlegroups.com>

On Mar 10, 4:11 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
>     win32file.CreateFile(r'\\.\\' + drive, GENERIC_READ,
> FILE_SHARE_READ,
>                          None, OPEN_EXISTING, 0, 0)

Oops! That should have been:

    h = win32file.CreateFile(r'\\.\\' + drive, GENERIC_READ,
                             FILE_SHARE_READ, None,
                             OPEN_EXISTING, 0, 0)



From kyosohma at gmail.com  Thu Mar 29 15:34:06 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 12:34:06 -0700
Subject: How can I get the content of a web site using http library
In-Reply-To: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
References: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
Message-ID: <1175196846.439678.109250@y66g2000hsf.googlegroups.com>

On Mar 29, 2:18 pm, "silverburgh.me... at gmail.com"
<silverburgh.me... at gmail.com> wrote:
> I am trying to get the content of a web site like this:
> But my question is how can I do a 'GET' request without putting the '/
> index.html''
>
>    h = httplib.HTTP('www.yahoo.com')
>
>         # it takes 2 arguments here, but I don't know if the site has
> '/index.html' , how can I leave this out?
>
>         h.putrequest('GET')
>         h.endheaders()
>
>         errcode, errmsg, headers = h.getreply()
>
>         if (errcode == 200):
>
>             f = h.getfile()
>
> Thank you for your help.

You may want to go with the urllib module instead. Check out the how-
to below:

http://www.voidspace.org.uk/python/articles/urllib2.shtml

Mike



From paul at boddie.org.uk  Wed Mar 21 20:06:47 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 21 Mar 2007 17:06:47 -0700
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174496172.528613.236730@p15g2000hsd.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1174496172.528613.236730@p15g2000hsd.googlegroups.com>
Message-ID: <1174522007.762370.260990@b75g2000hsg.googlegroups.com>

flit wrote:
>
> OK, that kind of answer is what I was trying to avoid..

Perhaps, but it's possible that people get tired of answering the same
questions over and over again. A search in comp.lang.python for
"protect source code" will provide lots of answers, some as purely
technical as you desire.

> On Mar 21, 1:23 pm, Steven D'Aprano
> <s... at REMOVE.THIS.cybersource.com.au> wrote:
> > On Wed, 21 Mar 2007 06:36:16 -0700, flit wrote:
> > > 1 - There is a way to make some program in python and protects it? I
> > > am not talking about ultra hard-core protection, just a simple one
> > > that will stop 90% script kiddies.
> >
> > Protect it from what? Viruses? Terrorists? The corrupt government? Your
> > ex-wife cutting it up with scissors? People who want to copy it? People
> > who will look at your code and laugh at you for being a bad programmer?
> >
> > Until you tell us what you are trying to protect against, your question
> > is meaningless.
>
> In this time I supposed someone took too much coffee..But will
> ignore..

I think Mr D'Aprano seeks too much clarification for what would appear
to be a question that would be satisfied by a "fire and forget"
response, in that people telling you the usual things (distribute
bytecode, make an executable, deploy a Web service) and leaving you to
figure it out yourself would be sufficient, especially from my
perspective since I view binary-only software rather dimly having had
to work with it (or mostly around it) fairly often in previous
corporate environments. However, in choosing to ignore what he has to
say (although you've made a bad job of actually ignoring it) you lose
out on some good insights.

> > Is your program valuable? Is it worth money? Then the 90% of script
> > kiddies will just wait three days, and download the program off the
> > Internet after the real hackers have broken your protection.
> >
> > If it is NOT valuable, then why on earth do you think people will put up
> > with whatever "protection" you use? Why won't they just use another
> > program?
>
> It?s doesn?t matter if it is the next BIG HIT Ultra-fast-next-google
> thing or a programm to take control of my "pet-people-living-in-
> welfare-trying-to-be-political"
> It?s a technical question, If you can?t answer it ok, I will not
> suppose that you are it or that, it?s not a personal question or
> matter.

No, but as was pointed out, if you make something valuable enough and
apply complicated enough technology to protect it, you spend your way
into becoming a top ten target for people who will "unprotect" it in
every sense. So it's a social and an economic matter as well as an
ethical and a technical one. Don't agree? You should read the paper
about reverse engineering Skype - the effort used Python, by the way -
and that was done ostensibly for network management purposes, although
lots of people would quite happily leverage that kind of work for
other purposes. Sure, most people won't care about your program enough
to do anything more than run a decompiler on it (either a Python
bytecode one or a machine code one), and that might be too
sophisticated for your users, but it's a tradeoff defined in terms of
who your users are and what the reward might be for them in getting
access to your "secrets".

> > > 2 - If I put the code in web like a web service, how can I protect my
> > > code from being ripped? There is a way to avoid someone using my site
> > > and ripping the .py files?
> >
> > Don't make the .py files available on the web server.
> >
>
> Now we have a real contribution to the thread. Thank You

It was surely the answer all along. Software as a service, you know?

> > [penny drops]
> >
> > Hang on, you want us to believe that you're a serious computer programmer
> > with a seriously valuable program that's worth "protecting", and you don't
> > know that? I smell a troll.

[...]

> Again, you don?t have to believe, suppose or think anything about me,
> are you capable to make any contribution? Technical one? Are you
> sooooooo good and "serious" programmer that you did not develop your
> personal skills, and thinks that winning an argument in internet is
> the best thing in the world?

If the advice to not distribute your code - instead offering the
software as a service - was genuinely enlightening to you then I think
Mr D'Aprano has made quite a contribution that you fail to
acknowledge. If the enlightenment is merely for show, expressing shock
that Python programs can't be protected when they're distributed, then
stopping short of using the T word (as in the word used by Mr D'Aprano
above) I'd say that you should acquaint yourself with "copy
protection" and DRM mechanisms as well as the phenomenon that is
Trusted (a.k.a. Treacherous) Computing, then apply that knowledge to
any other favourite platforms and tools you may have.

Paul

P.S. I suppose sarcasm is a natural response when someone feels like
they're being lectured to, but you could pay good money and not get
advice as comprehensive as this. Still, I suppose it beats people
thinking that software patents are somehow cool tools of innovation
that confer technical and social credibility.



From rw at smsnet.pl  Fri Mar 23 09:57:39 2007
From: rw at smsnet.pl (Rob Wolfe)
Date: 23 Mar 2007 06:57:39 -0700
Subject: Create new processes over telnet in XP
In-Reply-To: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
Message-ID: <1174658259.620897.171480@o5g2000hsb.googlegroups.com>


Godzilla wrote:
> Hello,
>
> How do you create/spawn new processes in XP over telnet using python?
> I.e. I would like to create a new process and have it running in the
> background... when I terminate the telnet connection, I would what the
> spawned processes to keep running until I shut it off...
>
> I got the os.popen method to spawn a new process running in the
> backgroun, but not over telnet... tried os.popen[2, 3, 4] and also
> subprocesses.popen without any luck...

I don't know what kind of OS there is on that remote host you telnet
to.
The idea boils down to appropriate using of methods
`read_until` and `write` from class `telnetlib.Telnet`.

For more complicated stuff you can consider using pyexpect.

Here is a small example of connecting to HP-UX.
You can adjust that to your needs.

<code>
import telnetlib, time

def login(tn, login, passwd, prompt):
    tn.read_until("login: ")
    tn.write(login + "\n")
    if passwd:
        tn.read_until("Password: ")
        tn.write(passwd + "\n")
    tn.read_until(prompt)
    time.sleep(2)
    print "logged in"

def run_proc(tn, progname):
    tn.write("nohup %s &\n" % progname)
    tn.write("exit\n")
    print "program <%s> running" % progname

def kill_proc(tn, login, prompt, progname):
    tn.write("ps -u %s\n" % login)
    buf = tn.read_until(prompt)
    pid = get_pid(buf, progname)
    if not pid:
        print "program <%s> not killed" % progname
        tn.write("exit\n")
        return
    tn.write("kill -TERM %s\n" % pid)
    tn.write("exit\n")
    print "program <%s> killed" % progname

def get_pid(buf, progname):
    pid, comm = None, None
    for line in buf.split("\n"):
        try:
            pid, _, _, comm = line.split()
        except ValueError:
            continue
        if comm == progname:
            return pid

tn = telnetlib.Telnet(HOST, PORT)
#tn.set_debuglevel(1)
login(tn, "login", "passwd", "/home/user")
run_proc(tn, "python ~/test.py")
#kill_proc(tn, "login", "/home/user", "python")
</code>

--
HTH,
Rob



From stesch at no-spoon.de  Sat Mar  3 15:40:22 2007
From: stesch at no-spoon.de (Stefan Scholl)
Date: Sat, 3 Mar 2007 21:40:22 +0100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
Message-ID: <0T3tfb9iIlqkNv8%stesch@parsec.no-spoon.de>

Nicholas Parsons <parsons.nicholas1 at gmail.com> wrote:
> I realize that in this context it is used for removing a specific key  
> from the current dictionary object.  But why call it pop and not  
> something more intuitive like remove or delete?

I wasn't a python programmer back than, but I'd guess it's
because pop not just removes the key, it returns the value as
well.


-- 
Web (en): http://www.no-spoon.de/ -*- Web (de): http://www.frell.de/


From john.davis.85 at gmail.com  Thu Mar 29 16:26:07 2007
From: john.davis.85 at gmail.com (John Davis)
Date: Thu, 29 Mar 2007 13:26:07 -0700
Subject: python problem: creating subprocess (it kills the parent process)
Message-ID: <61fdaffc0703291326m710def32hb404e2f0f1445503@mail.gmail.com>

Hi all,
I am using Python 2.4. I am trying to run a C++ program on Red hat linux
enterprise edition from Python by using various methods like > Os.system
>
> Os.popen
>
> Subprocess.popen
>
> Os.execvp
>
> Os.spawnl
>

In all of these methods the program kills python program also. So, let's say
i am in python shell as follows

$> python
Python 2.4.4 (#1, Mar 28 2007, 15:30:40)
[GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>>os.system('program_name')
.......
.......
#program_output
.......
.......
No more foreground apps, exiting
Signal received. Terminating
Signal received. Terminating
.......
.......
Hangup
......
......
$>

That is I exit the python shell as well. Please notice that Hangup written
in between which is not a part of the program output (i.e. I don't get this
'Hangup'  when I run the program independently from the command prompt). The
other things are part of the program output on stdout & stderr. Can anybody
give some pointers on how to solve this. I am running out of ideas on how to
run this program without exiting the python shell.


Thx
John.
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From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 08:35:38 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 23:35:38 +1100
Subject: List to string
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
	<1174192714.014092.79380@l77g2000hsb.googlegroups.com>
	<45fe7ddc$0$25292$426a34cc@news.free.fr>
	<pan.2007.03.20.03.41.19.501610@REMOVE.THIS.cybersource.com.au>
	<45ffcd12$0$18276$426a74cc@news.free.fr>
Message-ID: <pan.2007.03.20.12.35.38.787611@REMOVE.THIS.cybersource.com.au>

On Tue, 20 Mar 2007 13:01:36 +0100, Bruno Desthuilliers wrote:

> Steven D'Aprano a ?crit :
>> On Mon, 19 Mar 2007 13:11:09 +0100, Bruno Desthuilliers wrote:
>> 
>>> There's no "cast" in Python. It would make no sens in a dynamically 
>>> typed language, where type informations belong to the LHS of a binding, 
>>> not the RHS.
>> 
>> Surely you have left and right mixed up?
> 
> (rereading)
> (ashamed)
> Obviously, yes.
> Thanks for the correction.

That's okay, I have a big "L" and "R" written on the bottom of my shoes.
Of course, they didn't do me any good until I got a "L" and "R" tattooed
on my feet.



-- 
Steven.



From rds1226 at sh163.net  Wed Mar  7 15:49:35 2007
From: rds1226 at sh163.net (John)
Date: Wed, 7 Mar 2007 15:49:35 -0500
Subject: Is numeric keys of Python's dictionary automatically sorted?
References: <esn6nu$c8nt$1@netnews.upenn.edu>
	<1173300100.810023.223130@t69g2000cwt.googlegroups.com>
Message-ID: <esn8ir$c8p4$1@netnews.upenn.edu>

Then is there anyway to sort the numeric keys and avoid future implemetation 
confusion?


"Ant" <antroy at gmail.com> wrote in message 
news:1173300100.810023.223130 at t69g2000cwt.googlegroups.com...
> On Mar 7, 8:18 pm, "John" <rds1... at sh163.net> wrote:
> ...
>> However, I am not sure whether it is always like this. Can anybody 
>> confirm
>> my finding?
>
>>From the standard library docs:
>
> "Keys and values are listed in an arbitrary order which is non-random,
> varies across Python implementations, and depends on the dictionary's
> history of insertions and deletions."
>
> i.e. the behaviour you have discovered is an implementation detail,
> and could change in future versions.
> 




From aspineux at gmail.com  Wed Mar 21 16:43:12 2007
From: aspineux at gmail.com (aspineux)
Date: 21 Mar 2007 13:43:12 -0700
Subject: Make variable global
In-Reply-To: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
References: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
Message-ID: <1174509792.537832.224410@y66g2000hsf.googlegroups.com>

try

>>> import a
>>> a.blah
>>> a.go()
>>> a.blah

or

rewrite a.py like this

blah = [ None ]
def go():
    global blah
    blah[0] = 5 # and not blah=[5]

then
>>> from a import *
>>> blah
>>> go()
>>> blah

will work as expected

in case 1 ( import a )

blah in a.py and a.blah in python interpreter are the same
_REFERENCE_, they are the same

in case 2 (blah[0]=5)

blah in a.py and a.blah in python interpreter are just 2 differents
variables
that reference the _SAME_ object, but here (the difference with your
original case)
the object ( a list ) is a mutable object (you can change its value
without changing
the object. Here blah=[5] should simply make blah reference a new
object, but will
let the old one, [None] untouched, but unreachable (no more reference
to it)

BR





On 21 mar, 20:55, "abcd" <codecr... at gmail.com> wrote:
> I have a file, "a.py"
>
> blah = None
> def go():
>     global blah
>     blah = 5
>
> >From the python interpreter I try....
> >>> from a import *
> >>> blah
> >>> go()
> >>> blah
>
> ...i was hoping to see "5" get printed out the second time I displayed
> blah, but it doesn't.  Now, if I type this same code directly into the
> python interpreter it works as i was hoping.  what i am missing?
>
> thanks




From mark.dufour at gmail.com  Sat Mar 17 15:00:02 2007
From: mark.dufour at gmail.com (mark.dufour at gmail.com)
Date: 17 Mar 2007 12:00:02 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <7xslc5k9cc.fsf@ruckus.brouhaha.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
Message-ID: <1174158002.730076.22720@y80g2000hsf.googlegroups.com>


Paul Rubin wrote:
> "n00m" <n00m at narod.ru> writes:
> > Two first outputs is of above (your) code; next two - of my code:
>
> Yeah, I see now that we both used the same algorithm.  At first glance
> I thought you had done something much slower.  The 10 second limit
> they gave looks like they intended to do it about this way, but with a
> compiled language.  68 seconds isn't so bad for 4000 entries in pure
> CPython.  Next thing to do I think is use psyco or pyrex.

FWIW, the original program can also be compiled with Shed Skin (http://
mark.dufour.googlepages.com), an experimental (static-)Python-to-C++
compiler, resulting in a speedup of about 8 times for a single test
with 500 tuples. here's a slightly modified version that works with
Shed Skin CVS at least:

import time
t = time.clock()

q,w,e,r,sch,h = [],[],[],[],0,{}

f = open("m33.txt","rt")

n = int(f.readline())

for o in range(n):
   row = [int(x) for x in f.readline().split()]
   q.append(row[0])
   w.append(row[1])
   e.append(row[2])
   r.append(row[3])

f.close()

for x in q:
   for y in w:
     if h.has_key(x+y):
       h[x+y] += 1
     else:
       h[x+y] = 1

for x in e:
   for y in r:
     sch += h.get(-(x+y),0)

print sch
print time.clock() - t


Thanks,
Mark Dufour (Shed Skin author - send me bug reports!)



From steve at REMOVE.THIS.cybersource.com.au  Thu Mar 29 00:56:44 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 29 Mar 2007 14:56:44 +1000
Subject: how can I clear a dictionary in python
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com> <570dbbF28iktlU1@mid.individual.net>
Message-ID: <pan.2007.03.29.04.56.44.69007@REMOVE.THIS.cybersource.com.au>

On Thu, 29 Mar 2007 01:51:07 +0200, Bjoern Schliessmann wrote:

> Aahz wrote:
> 
>> Go back and read Christian's post, then post a followup explaning
>> why his solution is better than yours.  Your explanation should
>> use id(). 
> 
> I wonder how you two seem to know exactly what the OP wants ...

By reading his post perhaps? He asked how to clear a dictionary, not how
to assign an empty dictionary to a name. He already knows how to do that.

(I know that from reading his post too.)


-- 
Steven.




From gagsl-py2 at yahoo.com.ar  Sat Mar 24 21:26:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 Mar 2007 22:26:08 -0300
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.23.46.15@mailinator.com>
Message-ID: <op.tpp0xunnx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 24 Mar 2007 20:46:15 -0300, Mark <mark at mailinator.com> escribi?:

> The above doesn't actually work for my test script. I have an atexit
> call in the script which is deleting some temp files and I get the
> following traceback on termination when run with the above:
>
> Error in atexit._run_exitfuncs:
> Traceback (most recent call last):
>   File "atexit.py", line 24, in _run_exitfuncs
>     func(*targs, **kargs)
>   File "/home/mark/bin/myscript.py", line 523, in delete
>     if files.tempdir:
> AttributeError: 'NoneType' object has no attribute 'tempdir'

I don't know exactly what happened so it doesn't work anymore (and it  
worked before) but script finalization is always a bit fragile. All values  
in all modules dictionaries (holding globals) are set to None (presumably  
to help garbage collection by breaking cycles). When your delete function  
is called, globals like shutil or files are already gone. A way to avoid  
this problem is to hold a reference to all required globals, so your  
delete function would become:

      @staticmethod
      def delete(files=files,rmtree=shutil.rmtree):
  	'''Called to delete all temp files'''
  	if files.tempdir:
  	    rmtree(files.tempdir)

But I'm not sure if this is enough because rmtree relies on the os module  
to do its work.

-- 
Gabriel Genellina



From http  Fri Mar  2 20:27:29 2007
From: http (Paul Rubin)
Date: 02 Mar 2007 17:27:29 -0800
Subject: cyclic iterators ?
References: <1172884260.852007.122260@64g2000cwx.googlegroups.com>
Message-ID: <7xejo79kvy.fsf@ruckus.brouhaha.com>

"Tool69" <kibleur.christophe at gmail.com> writes:
> I've tried something like this to have a cyclic iterator without
> sucess:
> 
> def iterate_mylist(my_list):
>     k = len((my_list)
>     i=0
>     while i <= k :
>         yield my_list[i]
>         i += 1
>     i = 0
>     yield my_list[0]
> 
> I missed something, but I don't know what exactly.

As Bruno says, you can use itertools.cycle, but the problem above is
that you're not looping repeatedly through the list; you yield all the
elements, then yield the first element again, then stop.  So for
['a','b','c']  you'd yield the sequence a,b,c,a.  

I'd rewrite the above something like:

  def iterate_mylist(my_list):
     while True:
       for m in my_list:
          yield m

This just loops through the list over and over again.


From irstas at gmail.com  Sat Mar 24 11:32:44 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 24 Mar 2007 08:32:44 -0700
Subject: Problem with game
In-Reply-To: <1174749608.681416.243020@o5g2000hsb.googlegroups.com>
References: <1174749546.133947.232800@y80g2000hsf.googlegroups.com>
	<1174749608.681416.243020@o5g2000hsb.googlegroups.com>
Message-ID: <1174750364.789760.269340@l77g2000hsb.googlegroups.com>

On Mar 24, 5:20 pm, hollandlu... at gmail.com wrote:
> >  File "Python-episode12-Zahlenraten.py", line 15
> >     print "Die eingegebene Zahl ist kleiner als die generierte Zahl."
>
> IndentationError: expected an indented block

You should indent stuff inside if-statement deeper than the if itself.

I.e. NOT LIKE THIS:

if x==3:
print x


But like this:

if x==3:
    print x


If in your editor it looks like you have done this, the error
is probably that you are mixing tabs and spaces as indentation
and your editor doesn't display tabs as 8 spaces. This leads to
an amazing visual illusion cunnigly developed to turn people away
from Python.




From f98dawa at dd.chalmers.se  Thu Mar 29 09:29:21 2007
From: f98dawa at dd.chalmers.se (Dag)
Date: Thu, 29 Mar 2007 13:29:21 +0000 (UTC)
Subject: Problem with class variables
Message-ID: <slrnf0nfph.8f9.f98dawa@remote1.student.chalmers.se>

I have a problem which is probaly very simple to solve, but I can't
find a nice solution.
I have the following code 

class Test:
    def __init__(self):
        self.a=[1,2,3,4]
        self.b=self.a
    def swap(self):
        self.a[0],self.a[3]=self.a[3],self.a[0]
    def prnt(self):
        print self.a
        print self.b
c=Test()
c.swap()
c.prnt()

which returns 
[4,2,3,1]
[4,2,3,1]

Now I understand why it is doing this, but it's not what I want.  How to
I get it to return
[4,2,3,1]
[1,2,3,4]

Dag 


From grflanagan at yahoo.co.uk  Mon Mar 12 07:13:10 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 12 Mar 2007 04:13:10 -0700
Subject: programmatically manipulation environment variables of the
	calling shell
In-Reply-To: <mailman.4959.1173695641.32031.python-list@python.org>
References: <mailman.4959.1173695641.32031.python-list@python.org>
Message-ID: <1173697990.649859.206380@30g2000cwc.googlegroups.com>

On Mar 12, 11:33 am, "Maxim Veksler" <hq4e... at gmail.com> wrote:
> Hello list,
>
> I'm trying to write a python script that would allow me to manipulate
> shell variables of the calling shell. I'm trying to write some logic
> that would know to add LD_LIBRARY_PATH to the users environment.
>
> In bash this is done with "export", can I do this with python? (If at
> all possible because python is actually a sub process of bash).
>

The Popen class from the subprocess module takes an optional 'env'
parameter, which defines environment variables for the child process
created by Popen, if that helps.

Gerard




From skip at pobox.com  Fri Mar 30 12:05:06 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 30 Mar 2007 11:05:06 -0500
Subject: New to Python - Easy way to open a text file
In-Reply-To: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
Message-ID: <17933.13618.497463.892786@montanaro.dyndns.org>


    Max> Hey gang, I'm new to python coding.  I'm trying to find the
    Max> simplest way to open a text file (on the same server) and display
    Max> it's content.

Try the open() builtin function:

    f = open(plainfiles.href, "r")
    print f.read()

Skip


From mail at timgolden.me.uk  Tue Mar  6 08:39:42 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 06 Mar 2007 13:39:42 +0000
Subject: askstring Window to the top under Windows
In-Reply-To: <M1eHh.133$c62.114@read3.inet.fi>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<M1eHh.133$c62.114@read3.inet.fi>
Message-ID: <45ED6F1E.7080408@timgolden.me.uk>

Jussi Salmela wrote:
> iwl kirjoitti:
>> Hi,
>>
>> I tryed askstring to input some text in my script,
>> but some ugly empty Window appears with the
>> Input-Window behind and all together behind my
>> Console showing my script. So all have to brought
>> to the top first by the user - very unconfortable
>>
> 
> Are you asking about the function AskString in the EasyDialogs module of 
> Macintosh?
> 
> If so, I can't help you.
> 
> I'm just confused because the subject of your post contains the word 
> Windows which could mean Microsoft Windows on which Python hasn't the 
> EasyDialogs module.

Not that I've used it, but...

http://www.averdevelopment.com/python/EasyDialogs.html

TJG


From jjl at pobox.com  Sat Mar 10 18:53:31 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 10 Mar 2007 23:53:31 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
	<IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>
Message-ID: <87tzwszmdc.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:

> skip at pobox.com wrote:
>  > The distutils setup.py script checks for ncurses bits
> 
>     No, it just plows on after compiler errors.
> 
> > As another person pointed out, you're conflating Python proper with a
> > specific Linux distribution's packaging techniques.
> 
>     Exactly.  As I've pointed out before, Python doesn't play well with
> others.  The Python developers pass the buck to the Linux packager, the
> Linux packager passes the buck to the Python developers, and thus
> the user experience sucks.

I must say in my personal experience this is rather common with, well,
software ;-)

Traditionally, in the open source world, one does something about it,
or shuts up after having made one's point, say, ten or twenty times
<wink>


>     Debian seems to have struggled through this problem, but Red Hat
> apparently just decided to give up keeping up with Python versions.

Red Hat has traditionally been painful with Python.  People say this
is because of their own use of Python scripts, though I don't really
understand why that's caused all the problems they seem to have had.
>From what you say I take it that's still the case... I always used to
just build my own Python and found the pain reduced in my particular
case (still do that, on Ubuntu).  But I typically find that true with
anything "serious" -- compiling my own has often ended up less painful
in the long run, though apparently other people's MMV.

Also there's the traditional open source problem (this one by no means
restricted to Python, or even to open-source OSes -- I suffered this
on Solaris recently) of distros splitting software up and generally
"knowing better" than the maintainer.  I can understand there are
sometimes good security and integration reasons for this, but they
seem to get overzealous.  Recently, there's been some Python-specific
trouble of the "knowing better" kind with setuptools (popular
distutils extension) on various Linux systems, but that seems to have
quietened down now...

And there's always some degree of pain from distutils, which is
unmaintained and not terribly flexible (though still very useful).


John


From http  Sat Mar 10 20:35:53 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 17:35:53 -0800
Subject: distributed queue?
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
	<55h495F250nqbU1@mid.individual.net>
Message-ID: <7xhcsssgsm.fsf@ruckus.brouhaha.com>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
> (Why does everyone think that "concurrency" equals "usage of
> multiple threads"?)

Well, it doesn't necessarily, but that's easiest a lot of the time.

> Try Twisted for your networking needs. 

I should try to understand Twisted better one of these days, but it's
much more confusing than threads.  Also, the function I want to
parallelize does blocking operations (database lookups), so in Twisted
I'd have to figure out some way to do them asynchronously.


From arnodel at googlemail.com  Mon Mar  5 15:23:00 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 5 Mar 2007 12:23:00 -0800
Subject: Using string as file
In-Reply-To: <eshtk3$jat$1@news.in.tum.de>
References: <eshtk3$jat$1@news.in.tum.de>
Message-ID: <1173126179.922733.196060@s48g2000cws.googlegroups.com>

On Mar 5, 8:13 pm, Florian Lindner <Florian.Lind... at xgm.de> wrote:
> Hello,
> I have a function from a library thast expects a file object as argument.
> How can I manage to give the function a string resp. have the text it would
> have written to file object as a string?
>
> Thanks,
>
> Florian

See

http://docs.python.org/lib/module-StringIO.html

--
Arnaud



From http  Mon Mar  5 20:24:22 2007
From: http (Paul Rubin)
Date: 05 Mar 2007 17:24:22 -0800
Subject: Is every number in a list in a range?
References: <mailman.4693.1173129006.32031.python-list@python.org>
Message-ID: <7xk5xvgo55.fsf@ruckus.brouhaha.com>

"Steven W. Orr" <steveo at syslang.net> writes:
> I have a list ll of intergers. I want to see if each number in ll is
> within the range of 0..maxnum
> 
> I can write it but I was wondering if there's a better way to do it?

if all(0 <= x <= maxnum for x in ll): ...

This genexp is better than a loop because it bails out immediately
if it finds an out-of-range x.


From jeff at jmcneil.net  Wed Mar 28 21:09:32 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Wed, 28 Mar 2007 21:09:32 -0400
Subject: SimpleXMLRPCServer and Threading
In-Reply-To: <460af7ef$1@nntp.zianet.com>
References: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>
	<460af7ef$1@nntp.zianet.com>
Message-ID: <82d28c40703281809g3621bca3kd0bda42fc276ecf9@mail.gmail.com>

This is off of memory so I apologize if I don't get all of the details right.

The base SimpleXMLRPCServer uses TCPServer as it's server component
and SimpleXMLXMLRPCRequestHandler as it's handler. The handler is a
subclass of BaseHTTPRequestHandler, which itself doesn't handle any
multithreading.  You need to use one of the *MixIn classes if you want
to handle concurrent requests.

-Jeff


On 3/28/07, Erik Johnson <nobody at invalid.com> wrote:
>
> "Achim Domma" <domma at procoders.net> wrote in message
> news:460acd70$0$20282$9b4e6d93 at newsspool3.arcor-online.net...
> > Hi,
> >
> > is SimpleXMLRPCServer multithreaded or how does it handle multiple
> > clients? I want to implement a simple server which will be queried by
> > multiple processes for work to be done. The server will simply hold a
> > queue with files to process. The clients will ask for the next file.
> >
> > Do I have to sync access to the queue or is the server not threaded at
> all?
>
>
>     I don't claim to know much about the internals of the module, but it
> imports BaseHTTPServer which I am sure is multithreaded.  I did not test
> this with functions, but when you register an object in the server,
> different clients are accessing the same object:
> (The following example is modified from that given in the module
> documentation: http://docs.python.org/lib/module-SimpleXMLRPCServer.html)
>
>
> $ cat server.py
> #!/usr/bin/env python
>
> from SimpleXMLRPCServer import SimpleXMLRPCServer
>
> # Create server
> server = SimpleXMLRPCServer(("localhost", 8000))
> server.register_introspection_functions()
>
> # Register pow() function; this will use the value of
> # pow.__name__ as the name, which is just 'pow'.
> server.register_function(pow)
>
> # Register a function under a different name
> def adder_function(x,y):
>     return x + y
> server.register_function(adder_function, 'add')
>
>
> # Register an instance; all the methods of the instance are
> # published as XML-RPC methods (in this case, just 'div').
> class MyObj:
>     SEQ = None
>
>     def __init__(self):
>         self.SEQ = range(10000)
>         self.index = 0
>
>     def next_seq(self):
>         n = self.SEQ[self.index]
>         self.index += 1
>         return n
>
> server.register_instance(MyObj())
>
> # Run the server's main loop
> server.serve_forever()
>
>
> # First client calls:
> >>> import xmlrpclib
> >>> url = 'http://localhost:8000'
> >>> s = xmlrpclib.Server(url)
> >>> s.next_seq()
> 0
> >>> s.next_seq()
> 1
> >>> s.next_seq()
> 2
>
>
> # second client calls
> >>> import xmlrpclib
> >>> url = 'http://localhost:8000'
> >>> s = xmlrpclib.Server(url)
> >>> s.next_seq()
> 3
>
>
>     I did not programmatically drive these calls at the same time to try to
> force simultaneous access from separate requests, but my intuition is that
> it's a pretty good bet that SimpleXMLRPCServer has taken care of re-entrant
> issues.  It may be instructive for you to run that test yourself and
> explicitly verify requests do not interact.
>
>     Alternatively, if you really want to know for sure... Python is an
> open-source project. You can dig around in SimpleXMLRPCServer.py yourself
> and figure out exactly what it is doing:
>
> >>> import SimpleXMLRPCServer
> >>> SimpleXMLRPCServer
> <module 'SimpleXMLRPCServer' from
> '/usr/lib/python2.4/SimpleXMLRPCServer.pyc'>
> >>>
>
> ej at myBox ~
> $ vi /usr/lib/python2.4/SimpleXMLRPCServer.py
>
>
>
> see also:
> http://docs.python.org/lib/module-BaseHTTPServer.html
> http://docs.python.org/lib/module-SocketServer.html
>
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From Afro.Systems at gmail.com  Thu Mar  1 13:48:26 2007
From: Afro.Systems at gmail.com (Tzury)
Date: 1 Mar 2007 10:48:26 -0800
Subject: querying unicode data (sqlite) with python
Message-ID: <1172774906.573622.108920@8g2000cwh.googlegroups.com>


Given an sqlite db that stores the strings data such as names, etc.
encoded in Unicode.
How do I write a sql query statement with 'LIKE' or '=' operators and
insert the Unicoded name.

for example:

in table MY_TABLE, in column COL01 there is a value "?Habla espa?ol?"
within python I represent this value as  u'\u00bfHabla espa\u00f1ol?'

if I wish to produce a query that will fetch this row something like
"SELECT * FROM MY_TABLE WHERE COL01="?Habla espa?ol?" and I want it to
be done dynamically according to data I receive from a tcp socket.



From http  Fri Mar 16 03:19:36 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 23:19:36 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<1174026484.499259.300720@o5g2000hsb.googlegroups.com>
	<1174027318.528444.314250@y66g2000hsf.googlegroups.com>
Message-ID: <7xejnpirjr.fsf@ruckus.brouhaha.com>

"n00m" <n00m at narod.ru> writes:
> http://rapidshare.com/files/21267938/m1000.txt
> http://rapidshare.com/files/21268386/m4000.txt

I get 33190970 for the first set and 0 for the second set.

The first set only makes 38853 distinct dictionary entries, I guess
because the numbers are all fairly small so there's a lot of duplication.
The second set makes 8246860 distinct entries.

I got 128.42 sec runtime on the second set, on a 1.2 ghz Pentium M.
That was with the listcomp in the summation, which burned a lot of
extra memory, but I didn't bother writing out a summation loop.

I guess I can see a few other possible micro-optimizations but no
obvious algorithm improvements.


From Leo.Kislov at gmail.com  Fri Mar 16 04:46:06 2007
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 16 Mar 2007 01:46:06 -0700
Subject: lock problem
In-Reply-To: <mailman.5170.1174032315.32031.python-list@python.org>
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
	<mailman.5170.1174032315.32031.python-list@python.org>
Message-ID: <1174034766.213528.164170@e65g2000hsc.googlegroups.com>

On Mar 16, 12:40 am, Ritesh Raj Sarraf <r... at researchut.com> wrote:
> Leo Kislov wrote:
> > You're changing environmental variable __kabc_ldap that is shared
> > between your threads. Environment is not designed for that kind of
> > usage, it was designed for settings. Either use an option to set
> > output file or just redirect stdout. If the interface of ldapsearch is
> > so lame that it requires environmental variable use env to set the
> > variable: "env __kabc_ldap=/tmp/wrjhdsf ldapsearch ..."
>
> The environment variable is set with temp_file_name which gets the name from
> tempfile.mkstemp(), which is run in every thread. So I don't think the
> environment variable is going to be the same.

But you miss the fact that there is only one environment per process.

  -- Leo



From JHoover at fbi.gov  Mon Mar 12 03:25:48 2007
From: JHoover at fbi.gov (Gordon Airporte)
Date: Mon, 12 Mar 2007 03:25:48 -0400
Subject: Watching a file another app is writing
In-Reply-To: <1173676363.653940.133030@30g2000cwc.googlegroups.com>
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
	<1173676363.653940.133030@30g2000cwc.googlegroups.com>
Message-ID: <vu-dnXYa49qinWjYnZ2dnUVZ_viunZ2d@comcast.com>

Nick Vatamaniuc wrote:
  > You might need to look at pywin32 for Windows specific ways to listen
> to "file changed" event.
> 
> On Unix a quick shortcut would be to simply read the output of 'tail -
> f <file>' command...

Ah, I forgot I have Cygwin installed, so I do have tail. Unfortunately 
Windows will not let most programs save to the file while tail is 
watching it, and when I force it with vim :w! the output from tail -f 
does not update. Maybe I'm using it wrong.
Well, off to dig through windows documentation. Then I have to figure 
out how to write and event loop for the shell.


From parvini_navid at yahoo.com  Thu Mar  8 01:08:41 2007
From: parvini_navid at yahoo.com (Navid Parvini)
Date: Wed, 7 Mar 2007 22:08:41 -0800 (PST)
Subject: Exception
Message-ID: <469039.12682.qm@web54510.mail.yahoo.com>

Dear All,
   
  When an exception occurs in a Python Qt application and it is not caught,
an error message is printed to stderr and the control is given back
to the event handler (similar to the interactive Python session).
The resources allocated before the error occurred is not flushed, but
rather kept with the traceback information. The only way to release
these is to call sys.exc_clear(). Is there a way to force sys.exc_clear()
to be called automatically upon writing the error message?

  Thank you in advance.
  Navid

 
---------------------------------
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From http  Mon Mar 12 12:28:13 2007
From: http (Paul Rubin)
Date: 12 Mar 2007 08:28:13 -0800
Subject: nonlinear interpolation
References: <1173713333.615789.287070@v33g2000cwv.googlegroups.com>
Message-ID: <7x7itm8m02.fsf@ruckus.brouhaha.com>

"Michele Simionato" <michele.simionato at gmail.com> writes:
> Any pointer would be well received :)

Dunno about those libs but it helps to understand the mathematical
options.  Numerical Recipes by Teukolsky et al has understandable,
cookbook-like advice about this stuff.  I'm told that true numerics
gurus scoff at it but it's at least a start.


From bj_666 at gmx.net  Tue Mar 27 15:42:46 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 27 Mar 2007 21:42:46 +0200
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
	<1175005457.115349.92940@p15g2000hsd.googlegroups.com>
	<eubi9o$o1e$1@news1.zwoll1.ov.home.nl>
	<1175019004.956719.185810@p77g2000hsh.googlegroups.com>
Message-ID: <pan.2007.03.27.19.42.46.250637@gmx.net>

In <1175019004.956719.185810 at p77g2000hsh.googlegroups.com>, Mark Morss
wrote:

> Well, the discussion was about Python vs. Fortran, and Pyrex, as I
> understand it, is a tool for linking C to Python.

I think it's more than that.  It's more a subset of Python with a little
static typing.

Ciao,
	Marc 'BlackJack' Rintsch


From tjreedy at udel.edu  Mon Mar 19 15:44:25 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 Mar 2007 15:44:25 -0400
Subject: Documentation for "str()" could use some adjustment.
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
Message-ID: <etmp6m$sik$1@sea.gmane.org>


"John Nagle" <nagle at animats.com> wrote in message 
news:XnqLh.10046$M65.6527 at newssvr21.news.prodigy.net...
| The Python documentation for "str" says
| "str([object]) :
|     Return a string containing a nicely printable representation of an 
object."
|
| However, there's no mention of the fact that "str" of a Unicode string
| with non-ASCII characters will raise a conversion exception.  The
| documentation (and several Python books) seem to indicate that "str" will
| produce some "printable representation" for anything, not raise an 
exception.
|
| I know, it was proposed in PEP 349 to change "str" to return Unicode
| strings, and that's coming someday, along with all-Unicode Python,
| but meanwhile, the documentation should be clear about this.

I agree.  Formulate a concise sentence and submit it as a doc patch on SF. 
No need for a separate file -- just put it in the report box along with the 
section where the change goes and an explanation and example of the 
exception raised.  If accepted, a doc maintainer will put it in the Latex 
source.

tjr





From thinker at branda.to  Thu Mar  1 09:39:41 2007
From: thinker at branda.to (Thinker)
Date: Thu, 01 Mar 2007 22:39:41 +0800
Subject: Importing binary modules
In-Reply-To: <1172753991.529526.50190@z35g2000cwz.googlegroups.com>
References: <1172746279.351722.29410@p10g2000cwp.googlegroups.com>	<mailman.4565.1172748207.32031.python-list@python.org>
	<1172753991.529526.50190@z35g2000cwz.googlegroups.com>
Message-ID: <45E6E5AD.6020400@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


> Well, unfortunately I don't have access to the binary like that. It
> is given me, I just wanted to use it the way it was compiled. What
> could be done then?
You have better set LD_LIBRARY_PATH environment variable, or use
ldconfig (plz, man ldconfig)
to add the directory, where you shared object is in, to the search
path of dynamic linker.

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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l6WqAWcutwPtmJPleSdkrr4=
=Ov/a
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From rNOSPAMon at flownet.com  Thu Mar  1 14:00:46 2007
From: rNOSPAMon at flownet.com (Ron Garret)
Date: Thu, 01 Mar 2007 11:00:46 -0800
Subject: Python on a mac: how to build pythonw?
References: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>
	<mailman.4582.1172771922.32031.python-list@python.org>
	<rNOSPAMon-63AA6E.10054801032007@news.gha.chartermi.net>
	<mailman.4583.1172773764.32031.python-list@python.org>
Message-ID: <rNOSPAMon-F4DBC0.11004601032007@news.gha.chartermi.net>

In article <mailman.4583.1172773764.32031.python-list at python.org>,
 Robert Kern <robert.kern at gmail.com> wrote:

> Ron Garret wrote:
> > In article <mailman.4582.1172771922.32031.python-list at python.org>,
> >  Robert Kern <robert.kern at gmail.com> wrote:
> 
> >> Note that in recent versions of Python, I believe that the pythonw 
> >> executable 
> >> is no longer necessary as a workaround.
> > 
> > How recent?  I'm already using 2.5.
> 
> 2.5 definitely works.

Yes, once you know the magic incantation:

./configure --enable-universalsdk

:-)

rg


From steve at holdenweb.com  Wed Mar 21 13:49:35 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 13:49:35 -0400
Subject: Garbage collection
In-Reply-To: <etrper$t8g$1@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>	<mailman.5394.1174484981.32031.python-list@python.org>	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>	<pan.2007.03.21.16.25.02.135904@REMOVE.THIS.cybersource.com.au>
	<etrper$t8g$1@gemini.csx.cam.ac.uk>
Message-ID: <etrra3$qte$1@sea.gmane.org>

Tom Wright wrote:
> Steven D'Aprano wrote:
>> You've described an extremely artificial set of circumstances: you create
>> 40,000,000 distinct integers, then immediately destroy them. The obvious
>> solution to that "problem" of Python caching millions of integers you
>> don't need is not to create them in the first place.
> 
> I know it's a very artificial setup - I was trying to make the situation
> simple to demonstrate in a few lines.  The point was that it's not caching
> the values of those integers, as they can never be read again through the
> Python interface.  It's just holding onto the space they occupy in case
> it's needed again.
> 
>> So what's your actual problem that you are trying to solve?
> 
> I have a program which reads a few thousand text files, converts each to a
> list (with readlines()), creates a short summary of the contents of each (a
> few floating point numbers) and stores this summary in a master list.  From
> the amount of memory it's using, I think that the lists containing the
> contents of each file are kept in memory, even after there are no
> references to them.  Also, if I tell it to discard the master list and
> re-read all the files, the memory use nearly doubles so I presume it's
> keeping the lot in memory.
> 
I'd like to bet you are keeping references to them without realizing it. 
The interpreter won't generally allocate memory that it can get by 
garbage collection, and reference counting pretty much eliminates the 
need for garbage collection anyway except when you create cyclic data 
structures.

> The program may run through several collections of files, but it only keeps
> a reference to the master list of the most recent collection it's looked
> at.  Obviously, it's not ideal if all the old collections hang around too,
> taking up space and causing the machine to swap.
> 
We may need to see code here for you to convince us of the correctness 
of your hypothesis. It sounds pretty screwy to me.

>>> but is there anything I can do to get that memory back without closing
>>> Python?
>> Why do you want to manage memory yourself anyway? It seems like a
>> horrible, horrible waste to use a language designed to manage memory for
>> you, then insist on over-riding it's memory management.
> 
> I agree.  I don't want to manage it myself.  I just want it to re-use memory
> or hand it back to the OS if it's got an awful lot that it's not using. 
> Wouldn't you say it was wasteful if (say) an image editor kept an
> uncompressed copy of an image around in memory after the image had been
> closed?
> 
Yes, but I'd say it was the programmer's fault if it turned out that the 
interpreter wasn't doing anything wrong ;-) It could be something inside 
an exception handler that is keeping a reference to a stack frame or 
something silly like that.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 14:01:08 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 05:01:08 +1100
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<pan.2007.03.21.16.25.02.135904@REMOVE.THIS.cybersource.com.au>
	<etrper$t8g$1@gemini.csx.cam.ac.uk>
Message-ID: <pan.2007.03.21.18.01.07.125772@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 17:19:23 +0000, Tom Wright wrote:

>> So what's your actual problem that you are trying to solve?
> 
> I have a program which reads a few thousand text files, converts each to a
> list (with readlines()), creates a short summary of the contents of each (a
> few floating point numbers) and stores this summary in a master list.  From
> the amount of memory it's using, I think that the lists containing the
> contents of each file are kept in memory, even after there are no
> references to them.  Also, if I tell it to discard the master list and
> re-read all the files, the memory use nearly doubles so I presume it's
> keeping the lot in memory.

Ah, now we're getting somewhere!

Python's caching behaviour with strings is almost certainly going to be
different to its caching behaviour with ints. (For example, Python caches
short strings that look like identifiers, but I don't believe it caches
great blocks of text or short strings which include whitespace.)

But again, you haven't really described a problem, just a set of
circumstances. Yes, the memory usage doubles. *Is* that a problem in
practice? A few thousand 1KB files is one thing; a few thousand 1MB files
is an entirely different story.

Is the most cost-effective solution to the problem to buy another 512MB of
RAM? I don't say that it is. I just point out that you haven't given us
any reason to think it isn't.


> The program may run through several collections of files, but it only keeps
> a reference to the master list of the most recent collection it's looked
> at.  Obviously, it's not ideal if all the old collections hang around too,
> taking up space and causing the machine to swap.

Without knowing exactly what your doing with the data, it's hard to tell
where the memory is going. I suppose if you are storing huge lists of
millions of short strings (words?), they might all be cached. Is there a
way you can avoid storing the hypothetical word-lists in RAM, perhaps by
writing them straight out to a disk file? That *might* make a
difference to the caching algorithm used.

Or you could just have an "object leak" somewhere. Do you have any
complicated circular references that the garbage collector can't resolve?
Lists-of-lists? Trees? Anything where objects aren't being freed when you
think they are? Are you holding on to references to lists? It's more
likely that your code simply isn't freeing lists you think are being freed
than it is that Python is holding on to tens of megabytes of random text.



-- 
Steven.



From greg at cosc.canterbury.ac.nz  Sun Mar 11 03:16:01 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Sun, 11 Mar 2007 20:16:01 +1300
Subject: number generator
In-Reply-To: <1173573654.009953.266280@30g2000cwc.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
Message-ID: <55hoq0F24n8enU1@mid.individual.net>

MonkeeSage wrote:
> this ... requires that M be evenly divisible by N,

No, it doesn't -- I never said the numbers had
to be *equal*.

> and only works well with smaller N values, 

Why?

> and selections are limited to numbers in the
 > 1 to (M/N)+(M/N) range

I don't understand what you mean by that. Note
that the adjustments don't have to be restricted
to *adjacent* numbers -- you can pick any pair
of numbers and transfer an amount from one to
the other, as long as neither of them goes
below 1, and you can perform as many adjustments
as you like. So *any* sequence of numbers that
sums to M is a possible output from some
algorithm of this kind.

As for the distribution, the OP said there were
"no other restrictions", so it seems that the
distribution doesn't matter. Actually, if you
take that at face value, the numbers don't
even have to be *random* at all... or,
equivalently, they can have a very skewed
distribution. :-)

--
Greg


From jeffwatkins2000 at gmail.com  Thu Mar  1 05:39:30 2007
From: jeffwatkins2000 at gmail.com (jeffwatkins2000 at gmail.com)
Date: 1 Mar 2007 02:39:30 -0800
Subject: Eric on XP for Newbie
In-Reply-To: <1172679222.026525.248430@a75g2000cwd.googlegroups.com>
References: <1172679222.026525.248430@a75g2000cwd.googlegroups.com>
Message-ID: <1172745570.273112.268740@s48g2000cws.googlegroups.com>

Thanks guys

Found this on another blog and it seems to work - you need to run the
SPE.pyo file ...

 Stani said...

    In order to run SPE you need to install python from www.python.org
and wxpython 2.6 from wxpython.org.





From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 23 07:24:07 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 23 Mar 2007 22:24:07 +1100
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
Message-ID: <pan.2007.03.23.11.24.01.646010@REMOVE.THIS.cybersource.com.au>

On Fri, 23 Mar 2007 07:30:58 +0000, Mark wrote:

> On Fri, 23 Mar 2007 14:03:12 +1100, Steven D'Aprano wrote:
>> Since you've done these tests already, perhaps you can tell us what gain
>> you actually got?
> 
> About the same as you, ~20 msecs for my small script samples.

Well, I think that pretty much answers your question about whether it is
worth pre-compiling short shell scripts: you save about 20ms in execution
time, and lose 200ms in typing time. (Maybe a bit less if you are a
fast typist and don't use auto-completion.) You do the maths.


>> Of course you have to type the "c". You're not deleting the source files
>> away are you? *wink*
> 
> Sorry, the wink is lost on me?

It is because I didn't really think you were deleting the source files.
That would be incredibly stupid. But I mentioned it just in case some
not-so-bright spark decided to argue that you could use auto-completion
without needing to type that final "c" if you deleted the source file.

Presumably now somebody is going to suggest merely *moving* the source
files into another directory, thus spending a minute or two each time they
edit a script re-arranging files in order to save twenty or thirty
milliseconds when they execute the script. Hey, if your time is so
valuable that 20ms means that much to you, go for it.


> Of course I am not deleting the sources. In fact, I am also talking
> about python scripts being called from shell scripts. I guess I'm just
> surprised that the python installation does not provide a small stub
> invoker, e.g:
> 
> A small script called "python_compile_and_run" in "pseudo" code:

[snip pseudo-code]

> so I could just do a "python_compile_and_run myscript.py" and it would
> do what I want, i.e. run myscript.pyc if available and valid, generate
> and run it if necessary.

You shouldn't expect Python to come with every imaginable special-purpose
script already written for you! Besides, it's pretty simple to get that
functionality by hand when you need it, or automatically for that matter.

Here's one (untested) script that executes the pyc file in a subshell if
it exists and is new enough, and compiles it if it doesn't.


import os, sys, compiler
from stat import ST_MTIME as MT
if __name__ == "__main__":
    scriptname = sys.argv[1]
    compiledname = scriptname + "c"
    if not os.path.exists(compiledname) or \
    os.stat(compiledname)[MT] < os.stat(scriptname)[MT]:
        # compiled file doesn't exist, or is too old
        compiler.compileFile(scriptname)
        assert os.path.exists(compiledname)
    resultcode = os.system('python %s' % compiledname)
    sys.exit(resultcode)

Now don't forget to test whether launching the subshell takes longer than
the 20ms you might save. All that effort, and wouldn't it be ironic if it
was actually *slower* than executing the script from scratch each time...


-- 
Steven.



From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 23 09:49:29 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 24 Mar 2007 00:49:29 +1100
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<pan.2007.03.23.11.24.01.646010@REMOVE.THIS.cybersource.com.au>
	<pan.2007.03.23.12.22.41@mailinator.com>
Message-ID: <pan.2007.03.23.13.49.28.660145@REMOVE.THIS.cybersource.com.au>

On Fri, 23 Mar 2007 12:22:44 +0000, mark wrote:

> On Fri, 23 Mar 2007 22:24:07 +1100, Steven D'Aprano wrote:
>>     if not os.path.exists(compiledname) or \ os.stat(compiledname)[MT] <
>>     os.stat(scriptname)[MT]:
>>         # compiled file doesn't exist, or is too old
> 
> Surely the validity check done by Python is more sophisticated than
> this? Doesn't the binary file have to be compiled under the same python
> version etc?

Of course. What, do you want me to do all your work? :-)



>> Now don't forget to test whether launching the subshell takes longer
>> than the 20ms you might save. All that effort, and wouldn't it be ironic
>> if it was actually *slower* than executing the script from scratch each
>> time...
> 
> But Python proper is executing all the above anyhow isn't it? So the 20
> msecs advantage I measured already includes this logic.

I don't know how you measured the 20ms.

When you call a script direct from the shell, you've already got a shell
running. When you call a script from within Python via os.system, it has
to launch a sub-shell. That takes time.


> Anyhow, I give up. Compilation, it seems, only applies to python
> modules. Compilation is not appropriate for Python scripts. Should be
> in the FAQ.

No, that's not true. Python scripts certainly take advantage of compiled
modules.

The real lesson of this is that optimization isn't necessarily
straightforward. What we imagine "should be" faster might not be in
practice -- especially when dealing with micro-optimizations that only
save a few tens of milliseconds.

Frankly, it simply isn't worth trying to save 20ms in a script that takes
less than a second to run. If you scratch your nose before hitting enter,
you've wasted a hundred times what you've just spent hours trying to save.

Or, to put it another way:

The Rules of Optimization are simple. 
Rule 1: Don't do it. 
Rule 2 (for experts only): Don't do it yet.
-- Michael A. Jackson (no, not that Michael Jackson), "Principles of
Program Design", 1975.



-- 
Steven.



From ken.carlino at gmail.com  Fri Mar 30 23:59:50 2007
From: ken.carlino at gmail.com (ken)
Date: 30 Mar 2007 20:59:50 -0700
Subject: how to remove specified cookie in cookie jar?
Message-ID: <1175313590.516509.232500@y66g2000hsf.googlegroups.com>


How to remove specified cookie (via a given name) in cookie jar?

I have the following code, but how can I remove a specified cookie in
the cookie jar?
 cj = cookielib.LWPCookieJar()

 if cj is not None:
     if os.path.isfile(COOKIEFILE):
            print 'Loading Cookie--------------'
            cj.load(COOKIEFILE)



From duncan.booth at invalid.invalid  Thu Mar  8 05:40:12 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Mar 2007 10:40:12 GMT
Subject: Is numeric keys of Python's dictionary automatically sorted?
References: <esn6nu$c8nt$1@netnews.upenn.edu>
	<1173300100.810023.223130@t69g2000cwt.googlegroups.com>
	<esn8ir$c8p4$1@netnews.upenn.edu>
	<1173339260.576508.157010@c51g2000cwc.googlegroups.com>
	<pan.2007.03.08.08.20.22.586466@REMOVEME.cybersource.com.au>
Message-ID: <Xns98ED6C8A140F3duncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:

> If they are better-than
> average, they might try this:
> 
>>>> D = {1: None, 4: None, 3:None} # keys out of order
>>>> D
> {1: None, 3: None, 4: None}
> 
> Still ordered, right? It's actually quite hard to get a dict with purely
> integer keys out of order.

It isn't hard at all.

The next step would be to try something with a few more than 3 keys and 
decide that you can't be bothered with all that typing and inventing 
values.

dict.fromkeys([randint(0,99) for i in range(10)])

gives you keys out of order about 99.92% of the time.



From supervau at gmail.com  Wed Mar 14 00:55:55 2007
From: supervau at gmail.com (Frank)
Date: 13 Mar 2007 21:55:55 -0700
Subject: python/C++ wrapper
Message-ID: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>


Hi,

is there anyone here that calls C++ programs from python via swig? It
seems that there are a lot of different ways to do that. For me it
would be important that the original c++ code (which is available)
does not need to be changed and the whole compilation process (swig -
python.... g++....etc) is as simple as possible.

Does anyone have a running example of the following problem:

- A c++ program receives a 2D-matrix from python as input and gives a
2D-matrix as output back to python.

That's all! I would expect there should be someone who actually uses
swig for this kind of problem. If so, could you send me the code, that
would be great!

If it is important, I use linux and numpy.

Thanks,

Frank



From http  Thu Mar  8 18:37:42 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 15:37:42 -0800
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<esq56a$i94$1@panix3.panix.com>
Message-ID: <7xejnzcnnd.fsf@ruckus.brouhaha.com>

aahz at pythoncraft.com (Aahz) writes:
> >Care to name a "real" hosting provider that cares whether Python works?
> http://www.webfaction.com/

Thanks!  This is good to know about.


From steven.klass at gmail.com  Tue Mar 20 14:27:22 2007
From: steven.klass at gmail.com (rh0dium)
Date: 20 Mar 2007 11:27:22 -0700
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <mailman.5347.1174409873.32031.python-list@python.org>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
Message-ID: <1174415242.455972.51400@d57g2000hsg.googlegroups.com>


> Python usually installs so the latest version gets linked as
> /usr/bin/python. HTere's no need to bind your scripts to a particular
> version.
>
> regards

True - but that entirely depends on your path.  Example:

Redhat (RHEL3) ships with python2.3 in /usr/bin
Adding an 2.5 version to /usr/local/bin

set PATH=/usr/local/bin:/usr/bin

"python" - will use 2.5

Conversely if you:
set PATH=/usr/bin:/usr/local/bin

"python" - will use 2.3

but if I wanted to ensure I was using 2.5 I would simply type
python2.5  I want to ensure that the python version I am using is at
lease 2.4





From duncan.booth at invalid.invalid  Tue Mar  6 03:34:00 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 6 Mar 2007 08:34:00 GMT
Subject: Any way to determine test success from inside tearDown()?
References: <1173128693.022759.134280@t69g2000cwt.googlegroups.com>
Message-ID: <Xns98EB570BCDAB1duncanbooth@127.0.0.1>

"Christopher Corbell" <chriscorbell at gmail.com> wrote:

> What I'm after is a specialized clean-up approach for error/failure
> cases.

How about decorating the tests with something which tracks the status? 
Something like (completely untested):

def track_failure(f):
    def test(self):
        try:
            f(self)
            self.testResult = 'pass'
        except AssertionError:
            self.testResult = 'fail'
            raise
        except:
            self.testResult = 'error'
            raise
    return test

and then either decorate the tests directly when you define then, or 
perhaps easier just iterate over all the methods in the test class and 
decorate anything beginning 'test_'.

Alternatively try subclassing (or monkey patching) TestResult: the 
TestResult has methods addSuccess, addFailure and addError which are 
called at a suitable point, with the test as an argument. You could set 
a flag in the test at that point and check it during the cleanup. If you 
subclass TextTestRunner and override _makeResult you can substitute in 
your own TestResult class at that point.


From sjmachin at lexicon.net  Sat Mar 24 03:37:13 2007
From: sjmachin at lexicon.net (John Machin)
Date: Sat, 24 Mar 2007 18:37:13 +1100
Subject: Python object overhead?
In-Reply-To: <mailman.5530.1174684299.32031.python-list@python.org>
References: <mailman.5530.1174684299.32031.python-list@python.org>
Message-ID: <4604d537@news.eftel.com.au>

On 24/03/2007 8:11 AM, Matt Garman wrote:
> I'm trying to use Python to work with large pipe ('|') delimited data
> files.  The files range in size from 25 MB to 200 MB.
> 
> Since each line corresponds to a record, what I'm trying to do is
> create an object from each record.

An object with only 1 attribute and no useful methods seems a little 
pointless; I presume you will elaborate it later.

>  However, it seems that doing this
> causes the memory overhead to go up two or three times.
> 
> See the two examples below: running each on the same input file
> results in 3x the memory usage for Example 2.  (Memory usage is
> checked using top.)
> 
> This happens for both Python 2.4.3 on Gentoo Linux (64bit) and Python
> 2.3.4 on CentOS 4.4 (64bit).
> 
> Is this "just the way it is" or am I overlooking something obvious?
> 
> Thanks,
> Matt
> 
> 
> Example 1: read lines into list:
> # begin readlines.py

Interesting name for the file :-)
How about using the file.readlines() method?
Why do you want all 200Mb in memory at once anyway?

> import sys, time
> filedata = list()
> file = open(sys.argv[1])

You have just clobbered the builtin file() function/type. In this case 
it doesn't matter, but you should lose the habit, quickly.

> while True:
>    line = file.readline()
>    if len(line) == 0: break # EOF
>    filedata.append(line)
> file.close()
> print "data read; sleeping 20 seconds..."
> time.sleep(20) # gives time to check top

How about using raw_input('Hit the Any key...') ?

> # end readlines.py
> 
> 
> Example 2: read lines into objects:
> # begin readobjects.py
> import sys, time
> class FileRecord:
>    def __init__(self, line):
>        self.line = line
> records = list()
> file = open(sys.argv[1])
> while True:
>    line = file.readline()
>    if len(line) == 0: break # EOF
>    rec = FileRecord(line)
>    records.append(rec)
> file.close()
> print "data read; sleeping 20 seconds..."
> time.sleep(20) # gives time to check top
> # end readobjects.py

After all that, you still need to split the lines into the more-than-one 
fieldS (plural) that one would expect in a record.

A possibly faster alternative to (fastest_line_reader_so_far, 
(line.split('|')) is to use the csv module, as in the following example, 
which also shows one way of making an object out of a row of data.

C:\junk>type readpipe.py
import sys, csv

class Contacts(object):
     __slots__ = ['first', 'family', 'email']
     def __init__(self, row):
         for attrname, value in zip(self.__slots__, row):
             setattr(self, attrname, value)

def readpipe(fname):
     if hasattr(fname, 'read'):
         f = fname
     else:
         f = open(fname, 'rb')
     # 'b' is in case you'd like your script to be portable
     reader = csv.reader(
         f,
         delimiter='|',
         quoting=csv.QUOTE_NONE,
         # Set quotechar to a char that you don't expect in your data
         # e.g. the ASCII control char BEL (0x07). This is necessary
         # for Python 2.3, whose csv module used the quoting arg only when
         # writing, otherwise your " characters may get stripped off.
         quotechar='\x07',
         skipinitialspace=True,
         )
     for row in reader:
         if row == ['']: # blank line
             continue
         c = Contacts(row)
         # do something useful with c, e.g.
         print [(x, getattr(c, x)) for x in dir(c)
                 if not x.startswith('_')]

if __name__ == '__main__':
     if sys.argv[1:2]:
         readpipe(sys.argv[1])
     else:
         print '*** Testing ***'
         import cStringIO
         readpipe(cStringIO.StringIO('''\
             Biff|Bloggs|b1ff at aol.com
             Joseph ("Joe")|Blow|jblow at acoy.com
             "Joe"|Blow|jblow at acoy.com

             Santa|Claus|sclaus at northpole.org
             '''))

C:\junk>\python23\python readpipe.py
*** Testing ***
[('email', 'b1ff at aol.com'), ('family', 'Bloggs'), ('first', 'Biff')]
[('email', 'jblow at acoy.com'), ('family', 'Blow'), ('first', 'Joseph 
("Joe")')]
[('email', 'jblow at acoy.com'), ('family', 'Blow'), ('first', '"Joe"')]
[('email', 'sclaus at northpole.org'), ('family', 'Claus'), ('first', 'Santa')]

C:\junk>\python25\python readpipe.py
*** Testing ***
[('email', 'b1ff at aol.com'), ('family', 'Bloggs'), ('first', 'Biff')]
[('email', 'jblow at acoy.com'), ('family', 'Blow'), ('first', 'Joseph 
("Joe")')]
[('email', 'jblow at acoy.com'), ('family', 'Blow'), ('first', '"Joe"')]
[('email', 'sclaus at northpole.org'), ('family', 'Claus'), ('first', 'Santa')]

C:\junk>

HTH,
John


From http  Mon Mar 12 04:53:40 2007
From: http (Paul Rubin)
Date: 12 Mar 2007 00:53:40 -0800
Subject: New to Python
References: <mailman.4956.1173688843.32031.python-list@python.org>
Message-ID: <7xy7m2rgff.fsf@ruckus.brouhaha.com>

Alberto Vieira Ferreira Monteiro <albmont at centroin.com.br> writes:
> Hi, I am new to Python, how stupid can be the questions I ask?

Well, it's a matter of how you ask them, but anyway newcomers
are welcome here.

> For example, how can I add (mathematically) two tuples?
> x = (1,2)
> y = (3,4)
> How can I get z = (1 + 3, 2 + 4) ?

The simplest way is explicitly:

    z = (x[0]+y[0], x[1]+y[1])

There's not a really direct way to do it.  Tuples aren't vectors.

Python does support complex numbers if that's what you want:
   
   x = 1+2j   # Python uses "j" for sqrt(-1)
   y = 3+4j
   z = x + y
   print z


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 15:37:17 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 16:37:17 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
	<mailman.5496.1174624444.32031.python-list@python.org>
	<1174625242.761663.235320@e1g2000hsg.googlegroups.com>
	<mailman.5506.1174639747.32031.python-list@python.org>
	<1174655250.614164.279240@l77g2000hsb.googlegroups.com>
	<op.tpnpzkjzx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <op.tpnp4flbx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 16:34:22 -0300, Gabriel Genellina  
<gagsl-py2 at yahoo.com.ar> escribi?:

>> What about calling mscvrt_get_osfhandle from inside the SWIG wrapper?
>> I tried this but it seemed that the function was not exported to the
>> DLL.
>
> The idea is to separate both worlds - _get_osfhandle must be called from  
> the C runtime used by Python, not the one linked to your extension.

Ah, but you could import the msvcrt module and get it from there. *ONLY*  
get_osfhandle. The other function, open_osfhandle, must be from the  
runtime used by your extension.

-- 
Gabriel Genellina



From tjreedy at udel.edu  Wed Mar 28 18:37:09 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 28 Mar 2007 18:37:09 -0400
Subject: Hpw make lists that are easy to sort.
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl><7xbqidgqy0.fsf@ruckus.brouhaha.com>
	<euenlj$oll$1@news4.zwoll1.ov.home.nl>
Message-ID: <eueqml$pap$1@sea.gmane.org>


"Anton Vredegoor" <anton.vredegoor at gmail.com> wrote in message 
news:euenlj$oll$1 at news4.zwoll1.ov.home.nl...
| Paul Rubin wrote:
|
| > Well there are various hacks one can think of, but is there an actual
| > application you have in mind?
|
| Suppose both input lists are sorted. Then the product list is still not
|  sorted but it's also not completely unsorted. How can I sort the
| product? I want to know if it is necessary to compute the complete
| product list first in order to sort it. Is it possible to generate the
| items in sorted order using only a small stack?

If you have lists A and B of lengths m and n, m < n, and catenate the m 
product lists A[0]*B, A[1]*B, ..., A[m-1]*B, then list.sort will definitely 
take advantage of the initial order in each of the m sublists and will be 
faster than sorting m*n scrambled items (which latter is O(m*n*log(m*n))).

One could generate the items in order in less space by doing, for instance, 
an m-way merge, in which only the lowest member of each of the m sublists 
is present at any one time.  But I don't know if this (which is 
O(m*n*log(m))) would be any faster (in some Python implementation) for any 
particular values of m and m.

Terry Jan Reedy





From arnodel at googlemail.com  Sun Mar 18 04:06:15 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 18 Mar 2007 01:06:15 -0700
Subject: Still the __new__ hell ...
In-Reply-To: <1174175255.203550@jubilee.claranet.pt>
References: <1174167360.522350@jubilee.claranet.pt>
	<1174169283.313703.157020@n59g2000hsh.googlegroups.com>
	<1174175255.203550@jubilee.claranet.pt>
Message-ID: <1174205175.415438.275540@e65g2000hsc.googlegroups.com>

On Mar 17, 11:48 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Arnaud Delobelle escreveu:> On Mar 17, 9:31 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:

[snip]

> Thanks. This works exactly the way you wrote.
> Yet I am misunderstanding something. Can't pickle "see" that being
> MyDate derived from date it also has to look at variables from date?
> When do I need to do this? I am using pickle with a lot more complex
> classes without this problem.

Without the MyDate.__reduce__ method, Python uses the
datetime.date.__reduce__ method to pickle your MyDate instances, then
it uses MyDate.__new__ to unpickle them.  But your MyDate.__new__
method does not understand the format of a pickled date.  You could
also change the MyDate.__new__ method so that it does understand it,
but it wouldn't be that easy as you want it to accept a string, and
this is the format that dates are pickled in.

--
Arnaud





From ghirai at ghirai.com  Sat Mar 17 16:12:02 2007
From: ghirai at ghirai.com (Ghirai)
Date: Sat, 17 Mar 2007 22:12:02 +0200
Subject: IDE for wxPython
Message-ID: <457369853.20070317221202@ghirai.com>

Hello python-list,

Can anyone suggest an IDE for wxPython?
Or an IDE for TkInter?

Thanks.

-- 
Best regards,
Ghirai.



From sgeiger at ncee.net  Thu Mar 15 00:36:51 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Wed, 14 Mar 2007 23:36:51 -0500
Subject: distributing python software in jar like fashion
In-Reply-To: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
Message-ID: <45F8CD63.3090602@ncee.net>


> Hi,
>
> I have a small app which consist of a few .py files. Is there any way to 
> distribute it in jar like fashion as a single file I can just run python 
> on. I obviously look for platform independent solution.
>
> Thx in advance, A.
>   

"""
Author:  Shane Geiger <shane.geiger at gmail.com>


Wed Mar 14 21:55:58 CDT 2007

Hi,

I have a small app which consist of a few .py files. Is there any way to
distribute it in jar like fashion as a single file I can just run python
on. I obviously look for platform independent solution.

------

Here's an answer to your question.


To use this script put it in the same directory as your .py files.
See the glob.glob function below if you want to specify a directory if 
you want to change that.
(I tried to keep this example simple.)


Use the 'pack_mode()' and 'unpack_mode()' function calls at the bottom 
of the script to
control it.

Note: I have not tested this on Windows.

"""


import base64
import string, os
import zipfile
import glob

def readfile(f): return open(f, "r").read()
def writefile(f, data, perms=750): open(f, "w").write(data) and 
os.chmod(f, perms)

zip_file_name = 'python_modules.zip'


def write_test_modules():
    ## some test modules
    srgexample="""
print "This was base64 encoded."
    """
    srgexample2="""
print "This, too, was base64 encoded, and it was imported from a zip."
    """
    writefile('srgexample.py',srgexample)
    writefile('srgexample2.py',srgexample2)

def test_mode_cleanup():
    os.remove('srgexample.py')
    os.remove('srgexample2.py')
    os.remove(zip_file_name)


def pack_mode():
    """
    PACKING MODE:
    (you could automate this procedure if it is important to you)
    Zip the source files into one .zip file for easier handling.
    Base64 encode the zip file to avoid problems of including the file.
    Include the base64 representation of the zip file in a docstring, a
       step that you could automate (but I haven't).
    """

    write_test_modules()
   
    # open the zip file for writing, and write stuff to it
    import zipfile
    import glob, os
    # open the zip file for writing, and write stuff to it
    file = zipfile.ZipFile(zip_file_name, "w")

#    for name in glob.glob("*.py"):
    for name in [x for x in glob.glob("*.py") if x != __file__]:  # 
dont' try to zip up this file
        file.write(name, os.path.basename(name), zipfile.ZIP_DEFLATED)
    file.close()
    ## Here's how to watch what gets added
    ## open the file again, to see what's in it
    #file = zipfile.ZipFile(zip_file_name, "r")
    #for info in file.infolist():
    #    print info.filename, info.date_time, info.file_size, 
info.compress_size

    contents = open(zip_file_name, "r").read()
    file_contents_in_base64 = base64.encodestring(contents)
    print "Assign the following base64 encoded string to the 
'python_modules_zip_base64' "
    print "  variable (after which you can use unpack mode)."
   
    print file_contents_in_base64
    # THEN MANUALLY ADD THAT to your main file.
    # You could automatically edit the currently running file like this:

    test_mode_cleanup()


def unpack_mode():
    """
    UNPACKING MODE:
    """
    python_modules_zip_base64="""
UEsDBBQAAAAIABq8bjYpPJvJJgAAACYAAAANAAAAc3JnZXhhbXBsZS5weeMqKMrMK1FQCsnILFYo
TyxWSEosTjUzUUjNS85PSU3RU+JSAAIAUEsDBBQAAAAIABq8bjZ5v8x4SAAAAEwAAAAOAAAAc3Jn
ZXhhbXBsZTIucHkdyTEKgDAMBdC9p/h0Dk7iSXqBaCJmaFPagODpFd/6Uh/WArlcNgnhTrh5Yuep
2wpth4sKgZvA4i+r3Ueo4BxewXisLznh8wJQSwECFAMUAAAACAAavG42KTybySYAAAAmAAAADQAA
AAAAAAAAAAAApIEAAAAAc3JnZXhhbXBsZS5weVBLAQIUAxQAAAAIABq8bjZ5v8x4SAAAAEwAAAAO
AAAAAAAAAAAAAACkgVEAAABzcmdleGFtcGxlMi5weVBLBQYAAAAAAgACAHcAAADFAAAAAAA=
"""
    zip_file_contents = base64.decodestring(python_modules_zip_base64)
    def writefile(f, data, perms=750): open(f, "w").write(data) and 
os.chmod(f, perms)
    writefile(zip_file_name,zip_file_contents)

    # open the file, to see what's in it
    #file = zipfile.ZipFile("test.zip", "r")
    #for info in file.infolist():
    #    print info.filename, info.date_time, info.file_size, 
info.compress_size

    import sys
    sys.path.insert(0, zip_file_name)  # Add .zip file to front of path
    import srgexample
    import srgexample2

    ### you could even remove the file after using it
    os.remove(zip_file_name)

pack_mode()
#unpack_mode()





-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From soyouthinkimgonnalikethis at hotmail.com  Sat Mar 31 09:33:03 2007
From: soyouthinkimgonnalikethis at hotmail.com (Eric Price)
Date: Sat, 31 Mar 2007 09:33:03 -0400
Subject: os.system questions
In-Reply-To: <1360b7230703310551v46e56295l45270b060abba6ee@mail.gmail.com>
Message-ID: <BAY114-F19ECC8BD085DD0C805A7D6A0620@phx.gbl>

Great! That seems to work fine:

#!/usr/local/bin/python
import re, os

def freshReboot():
	up = os.popen('uptime').readlines()
	up = up[0]
	if re.search('day|hour', up):
		pass
	else:
		tup = re.split('min', up)
		first = tup[0]
		n = len(first)
		char = first[n-3:n-2]
		if re.match(' ', char):
			os.system("/usr/local/etc/rc.d/zz_mysql_starter_script.sh")

However, I don't see evidence that the os.system call at the end actually 
executes said script. The reason for this screwy script is because MySQL 
doesn't set the proper environment on boot and that screws up my Zope 
instances. So, I'll cron this script to run every 6 mins. If the server has 
been up less than 10 mins, this script will run. So, I rebooted the server 
and ran the script. But it didn't execute the os.system script at the end! 
If I run this from the python prompt instead:

import re, os

def a():
	up = os.popen('uptime').readlines()
	up = up[0]
	up = " 7:25AM  up 2 mins, 1 user, load averages: 2.42, 1.01, 0.41"
	if re.search('day|hour', up):
		pass
	else:
		tup = re.split('min', up)
		first = tup[0]
		n = len(first)
		char = first[n-3:n-2]
		if re.match(' ', char):
			print "gotcha!"

it prints "gocha!" Now, that substitution for the "up" var is what I got as 
output from the "uptime" command at the shell prompt. So, obviously, it 
should be running the script! What am I doing wrong?
TIA,
Eric

_________________________________________________________________
Watch free concerts with Pink, Rod Stewart, Oasis and more. Visit MSN 
Presents today. 
http://music.msn.com/presents?icid=ncmsnpresentstagline&ocid=T002MSN03A07001



From zacherates at gmail.com  Mon Mar 19 23:01:50 2007
From: zacherates at gmail.com (zacherates)
Date: 19 Mar 2007 20:01:50 -0700
Subject: difference between urllib2.urlopen and firefox view 'page source'?
In-Reply-To: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
References: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
Message-ID: <1174359710.488523.97950@e1g2000hsg.googlegroups.com>

On Mar 19, 10:30 pm, "cjl" <cjl... at gmail.com> wrote:
> Hi.
>
> I am trying to screen scrape some stock data from yahoo, so I am
> trying to use urllib2 to retrieve the html and beautiful soup for the
> parsing.
>
> Maybe (most likely) I am doing something wrong, but when I use
> urllib2.urlopen to fetch a page, and when I view 'page source' of the
> exact same URL in firefox, I am seeing slight differences in the raw
> html.
>
> Do I need to set a browser agent so yahoo thinks urllib2 is firefox?
> Is yahoo detecting that urllib2 doesn't process javascript, and
> passing different data?
>
> -cjl

http://developer.yahoo.com/yui/articles/gbs/index.html seems to
indicate that Yahoo! passes you different markup depending on which
grade your browser falls into.  I'm not sure I'd spoof your User-
Agent, after all your client is unlikely to support the features that
their looking for in Firefox (javascript, css, SVG).



From jareguero at telefonica.net  Wed Mar 21 06:45:09 2007
From: jareguero at telefonica.net (Jose Alberto Reguero)
Date: Wed, 21 Mar 2007 11:45:09 +0100
Subject: Problem with sockets and python 2.5
In-Reply-To: <200703192207.08178.jareguero@telefonica.net>
References: <200703192207.08178.jareguero@telefonica.net>
Message-ID: <200703211145.09834.jareguero@telefonica.net>

El Lunes, 19 de Marzo de 2007, Jose Alberto Reguero escribi?:
> I had two programs, server.py and client.py(attached)
>
> 1:
> 	server.py at i386 python 2.4
> 	client.py at x86_64 python 2.5
> Work
>
> 2:
> 	server.py at x86_64 python 2.5
> 	client.py at i386 python 2.4
> Don't work
>
> Any ideas?
> Thanks.
>
> Jose Alberto

The problem was with kernel 2.6.21-rc4.
I put kernel 2.6.20.3 and the programs work well.
Thanks.
Jose Alberto


From israphelr at googlemail.com  Tue Mar 13 18:52:02 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 13 Mar 2007 15:52:02 -0700
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <7xwt1kix3d.fsf@ruckus.brouhaha.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
	<7xwt1kix3d.fsf@ruckus.brouhaha.com>
Message-ID: <1173826322.834661.274430@l77g2000hsb.googlegroups.com>

On Mar 13, 10:43 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "israph... at googlemail.com" <israph... at googlemail.com> writes:
> > while (hint != 'n') or (hint != 'y'):
> >     hint = raw_input("Please specify a valid choice: ")
>
> > ---------------------------------------------
>
> > so everytime I run the program, and enter my choice as y or n, I'm
> > told to 'Please Specify a valid Choice Again' and can't get out of the
> > loop.
>
> Suppose your hint is 'y'.  Ask yourself these two questions:
>
>   1. Is (hint != 'n') true?
>   2. Is (hint != 'y') true?
>
> Now ask yourself what the condition in your while loop says.

Thanks.

*puts my head under a white sheet* =/




From deets at nospam.web.de  Thu Mar  1 11:16:28 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 Mar 2007 17:16:28 +0100
Subject: pattern matching
References: <1172754941.682697.122580@v33g2000cwv.googlegroups.com>
Message-ID: <54ocisF219u0hU1@mid.uni-berlin.de>

azrael wrote:

> can someone give me good links for pattern matching in images using
> python

There is a python-binding available for the OpenCV library, a collection of
state-of-the-art CV algorithms.

And it comes with a free manual....

Diez


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 28 03:57:51 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 28 Mar 2007 09:57:51 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <mailman.5685.1175032114.32031.python-list@python.org>
References: <mailman.5685.1175032114.32031.python-list@python.org>
Message-ID: <460a1fea$0$1414$426a74cc@news.free.fr>

Carl Friedrich Bolz a ?crit :
> ==========================================
> PyPy 1.0: JIT compilers for free and more
> ==========================================
> 
> Welcome to the PyPy 1.0 release - a milestone integrating the results
> of four years of research, engineering, management and sprinting
> efforts 

You guys rock !


From ziga.seilnacht at gmail.com  Sat Mar 24 16:20:36 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 24 Mar 2007 13:20:36 -0700
Subject: PyImport_ImportModule/embedding: surprising behaviors
In-Reply-To: <mailman.5359.1174435375.32031.python-list@python.org>
References: <mailman.5359.1174435375.32031.python-list@python.org>
Message-ID: <1174767636.080416.74740@n59g2000hsh.googlegroups.com>

David Abrahams wrote:
> I'm seeing highly surprising (and different!) behaviors of
> PyImport_ImportModule on Linux and Windows when used in a program with
> python embedding.
>
> On Linux, when attempting to import a module xxx that's in the current
> directory, I get
>
>   ImportError: No module named xxx
>
> I can work around the problem by setting
>
>   PYTHONPATH=.

Python puts the current directory in sys.path only if it can't
determine the directory of the main script. There was a bug on
Windows that always added current directory to sys.path, but it
was fixed in Python 2.5. This is documented in the library
reference:

http://docs.python.org/lib/module-sys.html#l2h-5149

> On Windows, I get:
>
>   'import site' failed; use -v for traceback
>
> I can work around the problem by setting PYTHONPATH to point to the
> python library directory:
>
>   set PYTHONPATH=c:\Python25\Lib

This happens because Python calculates the initial import path by
looking for an executable file named "python" along PATH. You can
change this by calling Py_SetProgramName(filename) before calling
Py_Initialize(). This is documented in API reference manual:

http://docs.python.org/api/embedding.html

That page also describes a few hooks that you can overwrite to
modify the initial search path. They are described in more detail
on this page:

http://docs.python.org/api/initialization.html

HTH,
Ziga




From karajitsu at yahoo.com.ph  Mon Mar 12 09:23:29 2007
From: karajitsu at yahoo.com.ph (karajitsu at yahoo.com.ph)
Date: 12 Mar 2007 06:23:29 -0700
Subject: Philippine Celebrities & Sex Tips
Message-ID: <1173705809.578332.308980@8g2000cwh.googlegroups.com>

you can find it here the Philippine Sexy Celebrities & Sex Tips at

http://www.pinoysexguru.blogspot.com



From grante at visi.com  Mon Mar 12 11:45:30 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 Mar 2007 15:45:30 -0000
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
Message-ID: <12vatcq6vh3v7ba@corp.supernews.com>

On 2007-03-12, Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
> Grant Edwards a ?crit :
> (snip)
>
>> Python is _far_ more robust than C++.
>
> I wouldn't say so - robustness is a quality of a program, not of a 
> language !-)

IMO, robustness is also a quality of a language.  In language
like C and C++, it's difficult to write a program that isn't
full of potential crashes and exploits: buffer overflows,
broken pointers, memory leaks, etc.  Python eliminates many of
those sources of problems, and is therefore a "more robust"
language.

-- 
Grant Edwards                   grante             Yow!  Uh-oh!! I forgot
                                  at               to submit to COMPULSORY
                               visi.com            URINALYSIS!


From gagsl-py2 at yahoo.com.ar  Sat Mar 31 01:16:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 31 Mar 2007 02:16:40 -0300
Subject: Py_DECREF/Py_INCREF as Functions?
References: <euk62h$qha$1@foggy.unx.sas.com>
Message-ID: <op.tp1fl20cx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 30 Mar 2007 20:21:53 -0300, Kevin D.Smith <Kevin.Smith at sas.com>  
escribi?:

> I'm trying to use Python from another application that allows me to
> load functions from a DLL.  While I have most of the API working, I
> have one big problem: Py_DECREF and PyINCREF are macros which I can't
> load from the Python DLL.  Since I can't decref any objects, I'm
> leaking memory all over the place.  Is there any way to decref an
> object with a function that can be loaded from the Python DLL?

Yes. Usually the macro has an ALLCAPS name and the function a TitleCase  
name. See Py_IncRef and Py_DecRef in object.c

-- 
Gabriel Genellina



From david at boddie.org.uk  Mon Mar 12 21:42:33 2007
From: david at boddie.org.uk (David Boddie)
Date: Tue, 13 Mar 2007 02:42:33 +0100
Subject: a better solution for GUI in python
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
	<1173613976.277044.242160@8g2000cwh.googlegroups.com>
	<55iaceF24d6qgU2@mid.individual.net>
	<et0sjg$l8m$1@nemesis.news.tpi.pl>
	<mailman.4973.1173715040.32031.python-list@python.org>
Message-ID: <825ee$45f6018a$54d1d767$4649@news.chello.no>

On Monday 12 March 2007 16:57, Chris Mellon wrote:

> Gtk I consider an extremely poor contender as a cross platform
> toolkit. The runtime is enormous and it makes little effort to appear
> native on any non-GNOME platform.

Given that wxPython more or less relies on GTK+ on Linux, I think
you're probably shooting yourself in the foot here, particularly when
you go on to say this:

> wxPython is also a perfectly reasonable solution, especially if you
> want a "native" seeming app on all platforms.

All platforms would ideally include KDE, of course. ;-)

David (sorry, couldn't resist)


From Force19 at gmail.com  Sun Mar 11 07:52:56 2007
From: Force19 at gmail.com (StD)
Date: 11 Mar 2007 04:52:56 -0700
Subject: a better solution for GUI in python
In-Reply-To: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <1173613976.277044.242160@8g2000cwh.googlegroups.com>

On 11 Mrz., 12:03, "ce" <cedb... at yahoo.com> wrote:
> Hi,
>
> My company is using python currently for our website. We need to
> develop a GUI front-end for our ERP that would be portable (Windows
> and Linux).
>
> My question is which solution would be better for the GUI (and easier
> to implement)? I knew there are something like wxidgets, QT and pyGTK?
> actually we will need some complicated stuff in the GUI and yet I
> don't know much about GUI programming.
>
> Any recommendation guys?

I'd recommend pyGTK. It's easy to use, delivers astonishing results
and is perfectly portable as far as I know. I'm working with it
myself, having the goal of simplicity as well as portability and I got
to say, it works! Hope that was helpful.



From kavithapython at yahoo.co.in  Thu Mar  1 06:20:48 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Thu, 1 Mar 2007 11:20:48 +0000 (GMT)
Subject: newbie question(file-delete trailing comma)
In-Reply-To: <op.tohlvrjyx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <256809.963.qm@web7812.mail.in.yahoo.com>

thanks,,,
   
  i tried another way and it works,,,
   
  f.writelines(','.join([('\"%s\"' % some[field]) for field in field_order]))

  thanks a lot,,,
   
  
Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
  En Wed, 28 Feb 2007 08:34:29 -0300, kavitha thankaian 
escribi?:

> thanks,,
> now i have one more problem,,,
> the strings should be seperated in an order,,,
> some={1:'a', 2:7, 3:'c', 4:'d'}
> i need the output to be a,c,d,7
> before my code was:
> field_order = [1,3,4,2]
> for field in field_order:
> f.writelines('\"%s\",' % someprt[field] )
> do you have an idea now how should it look like???

Proceed in small steps. First get the data you need to write, then, format 
them and build a single line, then write the new line onto the file.

some = {1:'a', 2:7, 3:'c', 4:'d'}
# i need the output to be a,c,d,7
field_order = [1,3,4,2]
row = []
for field in field_order:
row.append(some[field])
# row contains ['a', 'c', 'd', 7]
# convert to string
row = ['%s' % item for item in row]
### alternative: convert to string, with "" around each value
##row = ['"%s"' % item for item in row]
# make a single line, using "," as separator
line = ','.join(row)
# write to file
f.write('%s\n' % line)

-- 
Gabriel Genellina

-- 
http://mail.python.org/mailman/listinfo/python-list


 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
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From sjmachin at lexicon.net  Fri Mar 30 05:32:56 2007
From: sjmachin at lexicon.net (John Machin)
Date: 30 Mar 2007 02:32:56 -0700
Subject: Indentation for code readability
In-Reply-To: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <1175247176.208371.171340@p15g2000hsd.googlegroups.com>

On Mar 30, 7:04 pm, "DE" <devrim.er... at gmail.com> wrote:
> Hello,
>
> Here is what I do in C++ and can not right now in python :
>
> pushMatrix()
> {
>      drawStuff();
>
>      pushMatrix();
>      {
>             drawSomeOtherStuff()
>      }
>      popMatrix();}
>
> popMatrix();
>
> The curly brackets have no functional meaning but increase the
> readability significantly. I want to be able to do the same thing in
> python. Since curly brackets are not available and indenting without
> an if or while conditional doesn't work, I have started to question if
> this is possible in python at all.
>
> Any ideas ?
>

You *can* use round brackets and/or square brackets. E.g.

def pushMatrix():
    drawStuff()
    pushMatrix()
    (
        drawSomeOtherStuff()
    )
    [
        drawEvenMoreStuff()
    ]
    popMatrix()

Whether you *should* do that is a different question ... It's a bit
like an English definition of a Scottish gentleman: one who can play
the bagpipes, but doesn't :-)

HTH,
John



From eurleif at ecritters.biz  Tue Mar 20 22:23:17 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Tue, 20 Mar 2007 22:23:17 -0400
Subject: No module named ...
In-Reply-To: <1174428208.836953.161070@l75g2000hse.googlegroups.com>
References: <1174428208.836953.161070@l75g2000hse.googlegroups.com>
Message-ID: <46009715$0$30088$4d3efbfe@news.sover.net>

gtb wrote:
> I was having trouble with the 'no module named' error message when
> trying to import and noticed that other successful imports were
> pulling from .py files that had the dot replaced with $ and .class
> appended to the name. Actually in one case it picked up a .pyc file
> then created a .class file.
> 
> How do I create a .class file from my .py file so that functions can
> be imported.

Sounds like a Jython implementation detail, like CPython's .pyc files. 
Those files should presumably be created automatically the first time 
your module is imported. The problem importing your module is probably 
caused by something else, like an incorrect sys.path.


From hg at nospam.org  Wed Mar 28 07:08:11 2007
From: hg at nospam.org (hg)
Date: Wed, 28 Mar 2007 13:08:11 +0200
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
	<mailman.5718.1175104310.32031.python-list@python.org>
Message-ID: <r9yOh.13692$Ng1.7756@newsfe19.lga>

Facundo Batista wrote:

> hg wrote:
> 
> 
>> I'v been facing some very strange errors lately:
>>
>> one example:
> 
> You'll need to paste here the exact code and the traceback.
> 
> Regards,
> 
> --
> .   Facundo
> .
> Blog: http://www.taniquetil.com.ar/plog/
> PyAr: http://www.python.org/ar/

Hi,

the code is _very_ long and has many dependencies (the longest file has a
few thousand lines (GUI callbacks) ... I know, need to refactor / but my
client is in a hurry right now so that'll wait )

So I'm not sure how I can provide any source that'll help .

I'll try the untab function of pydev on all files and see whether that fixes
the problems

hg





From liyehua1986 at gmail.com  Sat Mar 10 23:12:57 2007
From: liyehua1986 at gmail.com (shellux)
Date: 10 Mar 2007 20:12:57 -0800
Subject: number generator
In-Reply-To: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
Message-ID: <1173586377.618497.289290@64g2000cwx.googlegroups.com>

On Mar 9, 10:44 pm, "cesco" <fd.calabr... at gmail.com> wrote:
> I have to generate a list of N random numbers (integer) whose sum is
> equal to M. If, for example, I have to generate 5 random numbers whose
> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> simple pattern or function in Python to accomplish that?
>
> Thanks and regards
> Francesco


import random

def genRandList(n,left):
   L = []
   if n > left:
      return L

   while n:
      L.append(int(random.random()*(left-n+1))+1)
      n -= 1;
      left -= L[-1]

   return L



From xiong.xu.cn at gmail.com  Mon Mar 12 03:32:58 2007
From: xiong.xu.cn at gmail.com (imx)
Date: 12 Mar 2007 00:32:58 -0700
Subject: using python to visit web sites and print the web sites image to files
Message-ID: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>

Hi there,

I wonder whether python can be used to simulate a real user to do the
following:
1) open a web site in a browser;
2) printscreen, so to copy the current active window image to
clipboard;
3) save the image file to a real file

Any pointer will be apprieciated!

Xiong



From doug at localhost.localdomain  Tue Mar 20 08:09:29 2007
From: doug at localhost.localdomain (Doug Gray)
Date: Tue, 20 Mar 2007 12:09:29 GMT
Subject: Bullet proof passing numeric values from NMEA data stream.
Message-ID: <pan.2007.03.20.12.09.21.19785@localhost.localdomain>

Folks,
I am looking for a fast but most importantly a bullet proof method to pass
and NMEA data stream (GPS output) ascii numeric strings. The best I can
offer is:

def fint(a):
 try: return int(float(a))
 except: return 0

The reason for this is the quality of the data from the huge variety of
GPS units available varies considerably.  Some units do not follow the
standard and I want to pass the data as best I can without hanging the
code for an oddball data value.

Can anyone suggest better?

For example, each of the following throw the exception so do not return
the correct value:

int('00.')
int(' 00.')
float('-  00')
float(' -  00')
float(' -  00')
float(' -  00.')
float('-  00.')
float('-  10.')
float('- 10.')
float('- 10.')
int('- 10.')
int('- 10.')
float('- 10.')
int('1.0')

Also, why should I consider the string module?  Is it faster/better?

TIA,
Doug


From chimalus at gmail.com  Tue Mar 27 20:30:16 2007
From: chimalus at gmail.com (jd)
Date: 27 Mar 2007 17:30:16 -0700
Subject: looking for RSS generator
Message-ID: <1175041816.363323.22460@n76g2000hsh.googlegroups.com>

I'm looking for sample code to generate an RSS feed.  I can annotate
my html code with comments/tags to mark the articles, all I need is an
"engine" to process the pages and generate the rss file.  If I was a
python wiz I'm sure I could do this quickly but as a newbie, an assist
here would certainly make this task go faster.  Thanks...

-- jeff



From spe.stani.be at gmail.com  Wed Mar  7 15:05:31 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 7 Mar 2007 12:05:31 -0800
Subject: SPE python IDE: Call for testers!
In-Reply-To: <1173219693.540708.81400@c51g2000cwc.googlegroups.com>
References: <1173185519.537841.86410@64g2000cwx.googlegroups.com>
	<1173219693.540708.81400@c51g2000cwc.googlegroups.com>
Message-ID: <1173297931.668593.245410@h3g2000cwc.googlegroups.com>

On 6 Mrz., 23:21, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> Very nice. One issue I've come across is that it doesn't seem to work
> with < wxwidgets-2.8 (segfault when trying to load a file), so you
> should probably set MIN_WX_VERSION to 2.8.
>
> Regards,
> Jordan

Hi Jordan,

Thanks for trying. Did you try from subversion? Could you send me the
debug output (python SPE.py --debug) or send me the file you were
trying to open? SPE has not any specific wxPython2.8 feature, so I am
very curious what causes the error.

Stani

PS Erratum: I forgot to update my blog with the changes in SPE: now
you can read them at: http://pythonide.stani.be



From kw at codebykevin.com  Fri Mar 30 15:32:21 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 30 Mar 2007 15:32:21 -0400
Subject: Tkinter menu question--how to pass arguments
Message-ID: <85c10$460d65c8$4275d90a$19337@FUSE.NET>

I'm having difficulty structuring a Tkinter menu entry. Here is the 
command in question:

self.finkmenu.add_command(label='Update List of Packages', 
command=self.authorizeCommand(self.scanPackages))

When I start my program, it crashes because it's trying to run the 
command self.authorizeCommand. The reason I'm structuring it in this 
fashion is that this command takes another command as an argument--in 
this case, self.ScanPackages.

The basic structure of the program is that the self.authorizeCommand 
function pops up a dialog box for a password; it then feeds the password 
to the function that it takes as an argument, i.e. self.scanPackages.

I tried setting up the menu entry without the additional parameter, i.e. 
command=self.authorizeCommand, but then when I try to run the command 
from the menu, it complains there are not enough arguments. 
Unsurprising, since self.authorizeCommand takes another function name as 
an argument.

How can I structure the menu item to reflect the correct number of 
arguments without it trying to execute the command?

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From dear_kandy at yahoo.com  Fri Mar 23 19:42:33 2007
From: dear_kandy at yahoo.com (mona bin jubair)
Date: Fri, 23 Mar 2007 16:42:33 -0700 (PDT)
Subject: saving algorithm
Message-ID: <716957.8417.qm@web62012.mail.re1.yahoo.com>

hi
  i want to ask about the algorithm's steps of saving games(sudoku,battleship)?
   
  thank you

 
---------------------------------
Don't pick lemons.
See all the new 2007 cars at Yahoo! Autos.
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From __peter__ at web.de  Sun Mar 25 12:19:51 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 25 Mar 2007 18:19:51 +0200
Subject: Other classes in a module
References: <mailman.5582.1174836152.32031.python-list@python.org>
Message-ID: <eu67f6$flu$01$1@news.t-online.com>

Roland Hedberg wrote:

> Can an instance of a class in a module, in any simple way find out which
> other classes that exists in said module ?

set(v for v in globals().values() if inspect.isclass(v) and v.__module__ ==
__name__)

Peter



From slm_guzel at hotmail.com  Sun Mar 25 17:23:20 2007
From: slm_guzel at hotmail.com (gslm)
Date: 25 Mar 2007 14:23:20 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <eu6k3n$uk6$03$1@news.t-online.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
	<eu6k3n$uk6$03$1@news.t-online.com>
Message-ID: <1174857800.421722.218190@e65g2000hsc.googlegroups.com>

Please, can you read again?
Yes, I understand that in phyton interpreter, i can't call phyton
command.Thanks...

But how can i run '.py' files from this command line?I wanted to use
the phyton command for this.

When i click a py extended file, for example calendar.py in lib
directory, file opens, then suddenly close,except graphical ones.Why?
How can i see the results?

And where can i learn which library must i import for whic class?

Sorry, i ask much:(But after learning these starting knowledeges, i
read tutorials, manuals etc.
But now i haven't found my answers yet.
Regards...



From aspineux at gmail.com  Thu Mar 29 10:22:08 2007
From: aspineux at gmail.com (aspineux)
Date: 29 Mar 2007 07:22:08 -0700
Subject: make RE more cleaver to avoid inappropriate : sre_constants.error:
	redefinition of group name
Message-ID: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>


I want to parse

'foo at bare' or '<foot at bar>' and get the email address foo at bar

the regex is

r'<\w+@\w+>|\w+@\w+'

now, I want to give it a name

r'<(?P<email>\w+@\w+)>|(?P<email>\w+@\w+)'

sre_constants.error: redefinition of group name 'email' as group 2;
was group 1

BUT because I use a | , I will get only one group named 'email' !

Any comment ?

PS: I know the solution for this case is to use  r'(?P<lt><)?(?P<email>
\w+@\w+)(?(lt)>)'



From attn.steven.kuo at gmail.com  Thu Mar  8 21:38:14 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 8 Mar 2007 18:38:14 -0800
Subject: Reading a portion of a file
In-Reply-To: <1173378944.595861.190980@c51g2000cwc.googlegroups.com>
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
	<1173372768.823896.32710@n33g2000cwc.googlegroups.com>
	<1173375977.853461.68240@v33g2000cwv.googlegroups.com>
	<1173376256.933492.71410@c51g2000cwc.googlegroups.com>
	<1173378944.595861.190980@c51g2000cwc.googlegroups.com>
Message-ID: <1173407894.702241.58660@30g2000cwc.googlegroups.com>

On Mar 8, 10:35 am, cmfvulcan... at gmail.com wrote:

(snipped)


>
> Ok, regex was my first thought because I used to use grep with Perl
> and shell scripting to grab everything from one pattern to another
> pattern. The file is just an unformatted file. What is below is
> exactly what is in the file. There are no spaces between the beginning
> and ending tags and the content. Would you recommend using spaces
> there? And if so, why?
>
> A sample of the file:


You can use iterators:

import StringIO
import itertools

def group(line):
    if line[-6:-1] == 'START':
        group.current = group.current + 1
    return group.current

group.current = 0

data = """
#VS:COMMAND:df:START
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/vzfs             20971520    517652  20453868   3% /
tmpfs                  2016032        44   2015988   1% /var/run
tmpfs                  2016032         0   2016032   0% /var/lock
tmpfs                  2016032         0   2016032   0% /dev/shm
tmpfs                  2016032        44   2015988   1% /var/run
tmpfs                  2016032         0   2016032   0% /var/lock
#VS:COMMAND:df:STOP

#VS:FILE:/proc/loadavg:START
0.00 0.00 0.00 1/32 14543
#VS:FILE:/proc/loadavg:STOP

#VS:FILE:/proc/meminfo:START
MemTotal:       524288 kB
MemFree:        450448 kB
Buffers:             0 kB
Cached:              0 kB
SwapCached:          0 kB
Active:              0 kB
Inactive:            0 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       524288 kB
LowFree:        450448 kB
SwapTotal:           0 kB
SwapFree:            0 kB
Dirty:               0 kB
Writeback:           0 kB
Mapped:          73840 kB
Slab:                0 kB
CommitLimit:         0 kB
Committed_AS:   248704 kB
PageTables:          0 kB
VmallocTotal:        0 kB
VmallocUsed:         0 kB
VmallocChunk:        0 kB
#VS:FILE:/proc/meminfo:STOP

#VS:FILE:/proc/stat:START
cpu  67188 0 26366 391669264 656686 0 0
cpu0 24700 0 10830 195807826 373309 0 0
cpu1 42488 0 15536 195861438 283376 0 0
intr 0
swap 0 0
ctxt 18105366807
btime 1171391058
processes 26501285
procs_running 1
procs_blocked 0
#VS:FILE:/proc/stat:STOP

#VS:FILE:/proc/uptime:START
1962358.88 1577059.05
#VS:FILE:/proc/uptime:STOP
""".lstrip("\n");

fh = StringIO.StringIO(data)

sections = itertools.groupby(itertools.ifilter(lambda line: len(line)
> 1, fh),
        lambda line: group(line))

for key, section in sections:
    for line in section:
        print key, line,


--
Hope this helps,
Steven



From lew at nospam.lewscanon.com  Sat Mar 31 12:00:43 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Sat, 31 Mar 2007 12:00:43 -0400
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <oqks03h3h5tldjodga4and8ua3hej6a1uq@4ax.com>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
	<oqks03h3h5tldjodga4and8ua3hej6a1uq@4ax.com>
Message-ID: <RPadnemQN54rGJPbnZ2dnUVZ_hKdnZ2d@comcast.com>

Michele Dondi wrote:
> Even better: pick one entry of your choice from
> 
> http://images.google.com/images?q=%22don%27t+feed+the+troll%22

I pick <http://img371.imageshack.us/img371/8263/noah7ok6rh.jpg/>

-- Lew


From macedo.silva at gmail.com  Fri Mar  9 07:08:06 2007
From: macedo.silva at gmail.com (macedo.silva at gmail.com)
Date: 9 Mar 2007 04:08:06 -0800
Subject: Creating a DLL file from Python Code
Message-ID: <1173442086.281115.95300@q40g2000cwq.googlegroups.com>


Hi,

I would like to request your attention for this very specific issue:

I have several classes in Python, and now I want simply re-use it, in
other language.

The closest to solution I think I came was with this site:
http://www.py2exe.org/index.cgi/Py2exeAndCtypesComDllServer
but I not able to solve questions related with TLB files and
__init__.py files.

So, could anyone give a tip about how to creat a dll file from Python?
It is possible under any conditions?

thank in advance

macedo



From kib2 at free.fr  Sat Mar  3 03:24:52 2007
From: kib2 at free.fr (tool69)
Date: Sat, 03 Mar 2007 09:24:52 +0100
Subject: cyclic iterators ?
In-Reply-To: <7xejo79kvy.fsf@ruckus.brouhaha.com>
References: <1172884260.852007.122260@64g2000cwx.googlegroups.com>
	<7xejo79kvy.fsf@ruckus.brouhaha.com>
Message-ID: <45e930df$0$18161$426a74cc@news.free.fr>

Paul Rubin a ?crit :
> 
> As Bruno says, you can use itertools.cycle, but the problem above is
> that you're not looping repeatedly through the list; you yield all the
> elements, then yield the first element again, then stop.  So for
> ['a','b','c']  you'd yield the sequence a,b,c,a.  

Yes, that was the problem.
Thanks for the explanation and for the cycle() function from itertool 
that I missed.



From http  Thu Mar 15 23:08:46 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 19:08:46 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
Message-ID: <7xtzwlkhq9.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> print sum([da.get(-(p[0]+q[1]), 0) for p in quads for q in quads])

The above should say:

  print sum(da.get(-(p[0]+q[1]), 0) for p in quads for q in quads)

I had to use a listcomp instead of a genexp for testing, since I'm
still using python 2.3, and I forgot to patch that before pasting to
the newsgroup.  But the listcomp will burn a lot of memory when the
list is large.

I'd be interested in the running time of the above for your large data set.  
Note that it still uses potentially O(n**2) space.


From nagle at animats.com  Mon Mar  5 13:03:39 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 05 Mar 2007 18:03:39 GMT
Subject: Howto pass exceptions between threads
In-Reply-To: <esgo77$t6e$1@online.de>
References: <esgo77$t6e$1@online.de>
Message-ID: <%XYGh.7209$re4.2013@newssvr12.news.prodigy.net>

Alexander Eisenhuth wrote:
> Hallo Alltogether,
> 
> I've searched in this mailing list, but it seems to me that there is no 
> general approach to pass exceptions from one thread to another.

    Very few languages have that.

    Actually, it could be made to work for Python, but it would have to
be carefully designed.  Something that raises an exception in another
thread the next time the thread blocks would have relatively sane
semantics.  You couldn't raise an exception on a compute-bound thread,
only at block points (locks, I/O, long system calls.)

					John Nagle


From grante at visi.com  Mon Mar 12 11:26:19 2007
From: grante at visi.com (Grant Edwards)
Date: Mon, 12 Mar 2007 15:26:19 -0000
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
Message-ID: <12vas8rhv0ji28d@corp.supernews.com>

On 2007-03-11, David Cramer <dcramer at gmail.com> wrote:
> On Mar 10, 10:52 pm, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com>
> wrote:
>> David Cramer wrote:
>> > If you had an application that you were about to begin development on
>> > which you wanted to be cross platform (at least Mac and Windows),
>> > would you suggest using c++ and Python?
>>
>> I'd strongly consider a pure python solution (I'd choose wxpython),
>> but if I needed to code backend stuff in a lower level language I'd
>> use C rather than C++.
>
> Well we want it to be very robust, and python isn't exactly
> the fastest language, or one with the lowest overhead :)

Python is _far_ more robust than C++.

-- 
Grant Edwards                   grante             Yow!  If Robert Di Niro
                                  at               assassinates Walter Slezak,
                               visi.com            will Jodie Foster marry
                                                   Bonzo??


From ptmcg at austin.rr.com  Tue Mar 27 13:58:02 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Mar 2007 10:58:02 -0700
Subject: pattern search
In-Reply-To: <56sqtbF29auttU2@mid.uni-berlin.de>
References: <mailman.5671.1175008459.32031.python-list@python.org>
	<56sqtbF29auttU2@mid.uni-berlin.de>
Message-ID: <1175018282.059201.3200@d57g2000hsg.googlegroups.com>

On Mar 27, 10:18 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> Fabian Braennstroem wrote:
> > Hi,
>
> > I wrote a small gtk file manager, which works pretty well. Until
> > now, I am able to select different file (treeview entries) just by
> > extension (done with 'endswith'). See the little part below:
>
> >                 self.pathlist1=[ ]
> >                 self.patternlist=[ ]
> >                 while iter:
> > #                print iter
> >                     value = model.get_value(iter, 1)
> > #                if value is what I'm looking for:
> >                     if value.endswith("."+ pattern):
> >                         selection.select_iter(iter)
> >                         selection.select_path(n)
> >                         self.pathlist1.append(n)
> >                         self.patternlist.append(value)
> >                     iter = model.iter_next(iter)
> > #                print value
> >                     n=n+1
>
> > Now, I would like to improve it by searching for different 'real'
> > patterns just like using 'ls' in bash. E.g. the entry
> > 'car*.pdf' should select all pdf files with a beginning 'car'.
> > Does anyone have an idea, how to do it?
>
> Use regular expressions. They are part of the module "re". And if you use
> them, ditch your code above, and make it just search for a pattern all the
> time. Because the above is just the case of
>
> *.ext
>
> Diez- Hide quoted text -
>
> - Show quoted text -

The glob module is a more direct tool based on the OP's example.  The
example he gives works directly with glob.  To use re, you'd have to
convert to something like "car.*\.pdf", yes?

(Of course, re offers much more power than simple globbing.  Not clear
how much more the OP was looking for.)

-- Paul



From anton.vredegoor at gmail.com  Thu Mar 29 04:57:06 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Thu, 29 Mar 2007 10:57:06 +0200
Subject: Hpw make lists that are easy to sort.
In-Reply-To: <mailman.5738.1175135745.32031.python-list@python.org>
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl><7xbqidgqy0.fsf@ruckus.brouhaha.com>	<euenlj$oll$1@news4.zwoll1.ov.home.nl><mailman.5732.1175121444.32031.python-list@python.org>	<eueu79$mkd$1@news5.zwoll1.ov.home.nl>
	<mailman.5738.1175135745.32031.python-list@python.org>
Message-ID: <eufv0t$m87$1@news6.zwoll1.ov.home.nl>

Terry Reedy wrote:

> If I understand correctly, you want to multiiply each of m numbers by each 
> of n numbers, giving m*n products.  That is O(m*n) work.  Inserting (and 
> extracting) each of these is a constant size m priority cue takes, I 
> believe, O(log(m)) work, for a total of m*n*log(m).  That is faster than 
> O(m*n*log(m*n)) for sorting m*n random numbers.

Probably, I'm not very good with big O computations. Please forget my 
earlier post and please also ignore the unfortunate subject line. I want 
the cartesian product of the lists but I want the sums of the items. 
Suppose the function to combine the items is

     def f(i,j):
         return i+j

And the list we want to sort would be made like this:

LR = [f(i,j) for i in L for j in R]

That would be like in my original post. However if the function would 
have been:

     def g(i,j):
         return n*i+j

The resulting cartesian product of the list would be sorted a lot 
quicker, especially if the two lists -L and R- we start with are sorted. 
(n is the length of both lists here)

So if changing the way the items are combined influences sorting time, 
is there also a way to optimize the order of generating the items for 
later sorting.

I mean optimized for a specific combining function, in this case 
function f.

> I don't know how you would sort by hashing.

Me too. I also learned that hashing is O(1) for non-mathematicians.

Probably I'm suffering from a mild outbreak of spring. I'm currently 
trying to stop myself from starting to smoke again or writing critical 
posts about PyPy, if it explains anything.

A.



From gagsl-py2 at yahoo.com.ar  Sun Mar 25 19:05:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 20:05:15 -0300
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
	<874po95hz5.fsf@gmail.com>
	<1174862657.151504.136350@b75g2000hsg.googlegroups.com>
Message-ID: <op.tpro21k7x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 19:44:17 -0300, <mark at agtechnical.co.uk> escribi?:

> from BeautifulSoup import BeautifulSoup
> import re
>
> page = open("soup_test/tomatoandcream.html", 'r')
> soup = BeautifulSoup(page)
>
> myTagSearch = str(soup.findAll('h2'))
>
> myFile = open('Soup_Results.html', 'w')
> myFile.write(myTagSearch)
> myFile.close()
>
> del myTagSearch
> ...............................
>
> Firstly, I'm getting the following character: "[" at the start, "]" at
> the end of the code. Along with "," in between each tag line listing.
> This seems like normal behaviour but I can't find the way to strip
> them out.

findAll() returns a list. You convert the list to its string  
representation, using str(...), and that's the way lists look like: with  
[] around, and commas separating elements. If you don't like that, don't  
use str(some_list).
Do you like an item by line? Use "\n".join(myTagSearch) (remember to strip  
the str() around findAll)
Do you like comma separated items? Use ",".join(myTagSearch)
Read about lists here http://docs.python.org/lib/typesseq.html and strings  
here http://docs.python.org/lib/string-methods.html

For the remaining questions, I strongly suggest reading the Python  
Tutorial (or any other book like Dive into Python). You should grasp some  
basic knowledge of the language at least, before trying to use other tools  
like BeautifulSoup; it's too much for a single step.

-- 
Gabriel Genellina



From DustanGroups at gmail.com  Sat Mar 24 12:43:27 2007
From: DustanGroups at gmail.com (Dustan)
Date: 24 Mar 2007 09:43:27 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <1174746808.705538@jubilee.claranet.pt>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<1174746808.705538@jubilee.claranet.pt>
Message-ID: <1174754607.773604.85170@l77g2000hsb.googlegroups.com>

On Mar 24, 7:16 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Dustan escreveu:
>
>
>
> > On Mar 23, 1:30 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> >> Mike Kent escreveu:
> >> ...
>
> >>> New way:
> >>> l=['a','b','c']
> >>> jl=','.join(l)
> >> I thank you all.
>
> >> Almost there ...
> >> I tried "".join(l,',') but no success ... :-(
>
> >> Paulo
>
> > Perhaps you're doing it wrong, despite having an example right in
> > front of you?
>
> Some misunderstanding here ...
> The post was just to thank. I was refering to what I tried
> before posting the question here.

Ah. Sorry; I didn't realize that.

> Regards
> Paulo




From deets at nospam.web.de  Mon Mar 19 15:20:12 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 Mar 2007 20:20:12 +0100
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>
Message-ID: <56863eF27p5bmU1@mid.uni-berlin.de>

John Nagle schrieb:
>   I'm looking for something that can read .MDB files, the format
> Microsoft Access uses, from Python.  I need to do this on
> Linux, without using Microsoft tools.  I just need to read
> the files once, so I can load the tables into another database.
> Speed isn't an issue, and I don't need to access the file in
> database fashion.  The files are too big to read into RAM all at once,
> though.
> 
>   I tried "MDBtools", but the only (last) release was
> a pre-release three years ago, and I've encountered
> many build problems trying to make it work on Fedora
> Core 6.

I was just gonna suggest it. Under ubuntu, it works easy as cake, and 
converts the mdb nicely to some CSV-files.

I think you should really try and make it work.

Diez


From robin at reportlab.com  Fri Mar 23 13:17:00 2007
From: robin at reportlab.com (Robin Becker)
Date: Fri, 23 Mar 2007 17:17:00 +0000
Subject: detect suprocess interaction 
Message-ID: <46040B8C.9070608@chamonix.reportlab.co.uk>

I'm using subprocess to carry out svn commands (probably should use the svn api 
package, but that's a dependency too far). Anyhow my code looks like

from subprocess import Popen, PIPE
p = Popen((svn,'ls',u),stdout=PIPE,stderr=PIPE)
i = p.wait()

and this sort of thing works well under most circumstances. However, when this 
code is executed for the very first time by a particular user it hangs waiting 
on user input.

This code is being used purely for testing correctness of a particular svn url 
so in the normal case we want to throw away both stdout and stderr. In the 
exceptional case is it possible to detect that input is required and only in 
that case issue the current contents of stdout (presumably a request for a 
password)?

Clearly I need to supply some kind of input filelike object, but is this sort of 
thing possible.
-- 
Robin Becker



From psdasilvaX at esotericaX.ptX  Sat Mar 17 11:20:09 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 17 Mar 2007 15:20:09 +0000
Subject: Returning other instance from __init__ - I need help
In-Reply-To: <mailman.5217.1174127418.32031.python-list@python.org>
References: <1173933158.948806@jubilee.claranet.pt>	<1huzkla.i6dshw1grnysmN%aleax@mac.com>	<1173970438.864747@jubilee.claranet.pt>	<1174076229.671240@jubilee.claranet.pt>	<1174093476.6937@jubilee.claranet.pt>
	<mailman.5217.1174127418.32031.python-list@python.org>
Message-ID: <1174167359.698020@jubilee.claranet.pt>

Gabriel Genellina escreveu:
> En Fri, 16 Mar 2007 22:05:05 -0300, Paulo da Silva
> <psdasilvaX at esotericaX.ptX> escribi?:
...

> class C(object):
> 
>     def __new__(cls, filename=None, foo=None, bar=None):
>         if filename is not None:
>             return cls.load(filename)
>         inst = super(C, cls).__new__(cls)


This makes the difference! I didn't know how to "build" an
instance inside __new__.

Thank you very much Gabriel.
Paulo


From aahz at pythoncraft.com  Thu Mar  8 18:11:06 2007
From: aahz at pythoncraft.com (Aahz)
Date: 8 Mar 2007 15:11:06 -0800
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
Message-ID: <esq56a$i94$1@panix3.panix.com>

In article <7xtzww5nu6.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
>
>Care to name a "real" hosting provider that cares whether Python works?

http://www.webfaction.com/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From deets at nospam.web.de  Fri Mar  2 03:30:20 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 Mar 2007 09:30:20 +0100
Subject: Questions about app design - OOP with python classes
In-Reply-To: <pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
Message-ID: <54q5lnF22aafrU1@mid.uni-berlin.de>

> A type system doesn't help. So what if they're both floats? The test
> is still bogus, your code will still wait too long to engage the
> retro-rockets, and the billion dollar space craft will still be travelling
> at hundreds of miles an hour when it reaches the surface of Mars.

A type system _could_ help. Multi-Level-Specification allows you to 
express physical quantities with their respective unit, and operations 
on them to yield the combined unit at compile-time. There are some 
rather complicated cases where simple unification won't solve the 
type-equations, but then you might annotate things explicitly.

Diez


From lbates at websafe.com  Wed Mar  7 15:52:28 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 07 Mar 2007 14:52:28 -0600
Subject: catching exceptions from an except: block
In-Reply-To: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
Message-ID: <45EF260C.6000205@websafe.com>

Arnaud Delobelle wrote:
> Hi all,
> 
> Imagine I have three functions a(x), b(x), c(x) that each return
> something or raise an exception.  Imagine I want to define a function
> that returns a(x) if possible, otherwise b(x), otherwise c(x),
> otherwise raise CantDoIt.
> 
> Here are three ways I can think of doing it:
> 
> ----------
> # This one looks ugly
> def nested_first(x):
>     try:
>         return a(x)
>     except:
>         try:
>             return b(x)
>         except:
>             try:
>                 return c(x)
>             except:
>                 raise CantDoIt
> 
> # This one looks long-winded
> def flat_first(x):
>     try:
>         return a(x)
>     except:
>         pass
>     try:
>         return b(x)
>     except:
>         pass
>     try:
>         return c(x)
>     except:
>         raise CantDoIt
> 
> # This one only works because a,b,c are functions
> # Moreover it seems like an abuse of a loop construct to me
> def rolled_first(x):
>     for f in a, b, c:
>         try:
>             return f(x)
>         except:
>             continue
>     raise CantDoIt
> ----------
> 
> I don't feel happy with any of these.  Is there a more satisfying way
> of doing this in Python? What I would like is something like:
> 
> ----------
> # This one isn't correct but looks the clearest to me
> def wished_first(x):
>     try:
>         return a(x)
>     except:
>         return b(x)
>     except:
>         return c(x)
>     except:
>         raise CantDoIt
> ----------
> 
> I guess what I'm looking for is some sort of
> if:
> elif:
> ...
> elif:
> else:
> 
> but for try: except:
> That's why
> try:
> except:
> except:
> ...
> except:
> 
> seemed natural to me :)  And I'd like to find a nice way to do this in
> a syntactically correct way.
> 
> Note: I've chosen functions a, b, c, but really I'm looking for a way
> that is suitable for any chunk of code.
> 
Without knowing more about the functions and the variable it is somewhat
hard to tell what you are trying to accomplish.  If a, b, c are functions
that act on x when it is a different type, change to one function that
can handle all types.

def d(x):
    if isinstance(x, basestring):
        #
        # Code here for string
        #
    elif isinstance(x, int):
        #
        # Code here for int
        #
    elif isinstance(x, float):
        #
        # Code here for string
        #
    else:
        raise ValueError


If they are different functions based on type do something like this:

#
# Set up a dictionary with keys for different types and functions
# that correspond.
#
fdict={type(''): a, type(1): b, type(1.0): c}
#
# Call the appropriate function based on type
#
fdict[type(x)](x)

-Larry


From nick at craig-wood.com  Mon Mar 12 07:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 12 Mar 2007 06:30:04 -0500
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
Message-ID: <slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>

Paul Rubin <http> wrote:
>  The fencepost method still seems to be simplest:
> 
>      t = sorted(random.sample(xrange(1,50), 4))
>      print [(j-i) for i,j in zip([0]+t, t+[50])]

Mmm, nice.

Here is another effort which is easier to reason about the
distribution produced but not as efficient.

def real(N, M):
    while 1:
        t = [ random.random() for i in range(N) ]
        factor = M / sum(t)
        t = [ int(round(x * factor)) for x in t]
        if sum(t) == M:
            break
        print "again"
    assert len(t) == N
    assert sum(t) == M
    return t

It goes round the while loop on average 0.5 times.

If 0 isn't required then just test for it and go around the loop again
if found.  That of course skews the distribution in difficult to
calculate ways!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From gagsl-py2 at yahoo.com.ar  Thu Mar 15 18:02:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 19:02:49 -0300
Subject: command line arguments using subprocess
References: <1173901864.230335.19530@d57g2000hsg.googlegroups.com>
Message-ID: <op.to83izxlx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 16:51:04 -0300, Jim <jhefferon at smcvt.edu> escribi?:

> I'm trying to use subprocess to drive a Perl script.  I'm having some
> trouble getting it to spot the command line arguments.  Basically, if
> I call subprocess(args).wait() where args has a second item, I can't
> convince the Perl script to see it.  Below is a pretty small example.
> If someone could get me unstuck, I'd appreciate it.  (Python 2.4.4c1,
> if that helps.)
> args=['/home/ftpmaint/test.pl','a']
> p=subprocess.Popen(args,shell=True,stdout=subprocess.PIPE,stderr=subprocess.PIPE,cwd=os.getcwd())

Try with 'perl' explicitely as first argument, or without shell=True; if  
cwd is the current dir, there is no need to include it.

-- 
Gabriel Genellina



From gdonald at gmail.com  Thu Mar 15 18:04:07 2007
From: gdonald at gmail.com (Greg Donald)
Date: Thu, 15 Mar 2007 17:04:07 -0500
Subject: Python shell on mac os x
In-Reply-To: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
Message-ID: <15e66e4e0703151504k696084efta253d42bbed75b9d@mail.gmail.com>

On 15 Mar 2007 14:56:13 -0700, Bert Heymans <bert.heymans at gmail.com> wrote:
> >>> ^[OA^[OC^[OD

Is your python built with readline support?

Also, you might check out iPython.


-- 
Greg Donald
http://destiney.com/


From bj_666 at gmx.net  Wed Mar 14 18:19:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 14 Mar 2007 23:19:38 +0100
Subject: question about class methods
References: <et9o1i$qfi$1@ruby.cit.cornell.edu>
Message-ID: <pan.2007.03.14.22.19.37.574373@gmx.net>

In <et9o1i$qfi$1 at ruby.cit.cornell.edu>, Darren Dale wrote:

> I've run across some code in a class method that I don't understand:
> 
>     def example(self, val=0)
>         if val and not self:
>             if self._exp < 0 and self._exp >= -6:
> 
> I am unfamiliar with some concepts here:
> 
> 1) Under what circumstances would "if not self" be True?

If an object is "true" is determined either by a `__nonzero__()` method
that returns `True` or `False` or a `__len__()` method where anything
except 0 means "true".

> 2) If "not self" is True, how can self have attributes?

Attributes are independent from the "truth" value of an object.

Ciao,
	Marc 'BlackJack' Rintsch


From tbrkic at yahoo.com  Wed Mar 28 10:28:15 2007
From: tbrkic at yahoo.com (glomde)
Date: 28 Mar 2007 07:28:15 -0700
Subject: Why doesnt __getattr__ with decorator dont call __get_method in
	decorator
Message-ID: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>

Hi,

I tried to write a decorator for that should be for methods but for
some reasons
it doens seem to work when you try to do it on the __getattr__ method
in a class.
Could anybody give some hints why this is?

Example:
class decoratorTest(object):
    def __init__(self, func):
        self.func = func

    def __get__(self, instance, cls=None):
        print "__get__", instance
        self.instance = instance
        return self

    def __call__(self, *args, **kwds):
        return self.func(self.instance, *args, **kwds)

class MyClass1(object):

    @decoratorTest
    def decoratorTestFunc(self):
        print "hello1"

    @decoratorTest
    def __getattr__(self,name):
        print "hello2"


a = MyClass1()
a.decoratorTestFunc() # This works since the __get__ method is called
and the instance is retreived
a.test # This doesnt call the __get__ !!!

Output
__get__ <__main__.MyClass1 object at 0x4012baac>
hello1
Traceback (most recent call last):
  File "/home/tonib/test.py", line 27, in ?
    a.test
  File "/home/tonib/test.py", line 12, in __call__
    return self.func(self.instance, *args, **kwds)
AttributeError: 'decoratorTest' object has no attribute 'instance'



From MonkeeSage at gmail.com  Thu Mar  8 23:09:36 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Mar 2007 20:09:36 -0800
Subject: Where to "import"?
In-Reply-To: <45f09905$0$28886$426a34cc@news.free.fr>
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
	<1173393063.705376@jubilee.claranet.pt>
	<45f09905$0$28886$426a34cc@news.free.fr>
Message-ID: <1173413376.191416.30990@s48g2000cws.googlegroups.com>

On Mar 8, 5:49 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr>
> >>1/ better to stick to naming conventions (class names in CamelCase)
>
> > Ok. Thanks.
>
> FWIW:http://www.python.org/dev/peps/pep-0008/

By my reading, PEP8 doesn't specify CamelCase as preferred over the
other styles it mentions. non_camel_case is also considered good
style, as I understand (and is used all over the standard library).

Regards,
Jordan



From frank-python at benkstein.net  Thu Mar 22 12:19:52 2007
From: frank-python at benkstein.net (Frank Benkstein)
Date: Thu, 22 Mar 2007 17:19:52 +0100
Subject: Question regarding __new__
Message-ID: <20070322171952.121530d7@localhost>

Hi,

the behaviour I always observed when creating instances by calling the
class A is that '__init__' is always only called when the object
returned by A.__new__ is an instance of A. This can be observed by the
following code:

class A(object):
    def __new__(cls, *args, **kwds):
        print "A.__new__", args, kwds
        return object.__new__(B, *args, **kwds)
    def __init__(cls, *args, **kwds):
        print "A.__init__", args, kwds

class B(object):
    def __new__(cls, *args, **kwds):
        print "B.__new__", args, kwds
        return object.__new__(cls, *args, **kwds)
    def __init__(cls, *args, **kwds):
        print "B.__init__", args, kwds

Interactively A() then gives:

>>> A()
A.__new__ () {}
<__main__.B object at 0xb7bed0ec>

Yet [1] says: "[...] some rules for __new__: [...] If you return an
object of a different class, its __init__ method will be called."

Am I missing something? Is this documented somewhere else? Also it
would be nice if someone could point me to the function that implements
this in C. I didn't find anything in object.c or typeobject.c.

Best regards
Frank Benkstein.

[1] http://www.python.org/download/releases/2.2/descrintro/#__new__

-- 
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From bruno.desthuilliers at gmail.com  Mon Mar  5 03:45:37 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 5 Mar 2007 00:45:37 -0800
Subject: Project organization and import
In-Reply-To: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
Message-ID: <1173084337.538171.35530@c51g2000cwc.googlegroups.com>

On 5 mar, 01:21, "Martin Unsal" <martinun... at gmail.com> wrote:
> I'm using Python for what is becoming a sizeable project and I'm
> already running into problems organizing code and importing packages.
> I feel like the Python package system, in particular the isomorphism
> between filesystem and namespace,

It's not necessarily a 1:1 mapping. Remember that you can put code in
the __init__.py of a package, and that this code can import sub-
packages/modules namespaces, making the package internal organisation
transparent to user code (I've quite often started with a simple
module, latter turning it into a package as the source-code was
growing too big).

> doesn't seem very well suited for
> big projects. However, I might not really understand the Pythonic way.

cf above.

> I'm not sure if I have a specific question here, just a general plea
> for advice.
>
> 1) Namespace. Python wants my namespace heirarchy to match my
> filesystem heirarchy. I find that a well organized filesystem
> heirarchy for a nontrivial project will be totally unwieldy as a
> namespace. I'm either forced to use long namespace prefixes, or I'm
> forced to use "from foo import *" and __all__, which has its own set
> of problems.

cf above. Also remember that you can "import as", ie:

import some_package.some_subpackage.some_module as some_module

> 1a) Module/class collision. I like to use the primary class in a file
> as the name of the file.

Bad form IMHO. Packages and module names should be all_lower,
classnames CamelCased.

>
> 1b) The Pythonic way seems to be to put more stuff in one file,

Pythonic way is to group together highly related stuff. Not to "put
more stuff".

> but I
> believe this is categorically the wrong thing to do in large projects.

Oh yes ? Why ?

> The moment you have more than one developer along with a revision
> control system,

You *always* have a revision system, don't you ? And having more than
one developper on a project - be it big or small - is quite common.

> you're going to want files to contain the smallest
> practical functional blocks. I feel pretty confident saying that "put
> more stuff in one file" is the wrong answer, even if it is the
> Pythonic answer.

Is this actually based on working experience ? It seems that there are
enough not-trivial Python projects around to prove that it works just
fine.




From michele.simionato at gmail.com  Thu Mar  8 04:46:35 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Mar 2007 01:46:35 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <mailman.4793.1173345622.32031.python-list@python.org>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
	<1173343058.897596.19570@s48g2000cws.googlegroups.com>
	<mailman.4793.1173345622.32031.python-list@python.org>
Message-ID: <1173347195.286850.21450@h3g2000cwc.googlegroups.com>

On Mar 8, 10:20 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> You forgot the standard disclaimer: "This is extremely dangerous stuff,
> only highly trained professionals can do that! Kids, never try this at
> home!"

;)

Yep, the only good use case for this kind of games is for prototyping
in current Python
features that are candidate for inclusion in future versions of
Python, but this was
what Raymond asked. However, there is also the fun of it ;)

        Michele Simionato



From bbxx789_05ss at yahoo.com  Sun Mar 18 16:53:45 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 18 Mar 2007 13:53:45 -0700
Subject: * operator--as in *args?
Message-ID: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>

Hi,

I can't find any documentation for the * operator when applied in
front of a name.  Is it a pointer?

What about the @ operator?

Are there python names for these operators that would make searching
for documentation on them more fruitful?

Thanks



From python at rcn.com  Sat Mar  3 19:32:15 2007
From: python at rcn.com (Raymond Hettinger)
Date: 3 Mar 2007 16:32:15 -0800
Subject: pop method question
In-Reply-To: <mailman.4633.1172954118.32031.python-list@python.org>
References: <mailman.4633.1172954118.32031.python-list@python.org>
Message-ID: <1172968335.511875.255750@p10g2000cwp.googlegroups.com>

[Nicholas Parsons]
>  Dictionaries in Python have no order but are sequences.  
> Now, does anyone know why the python core has this pop method  
> implemented for a dictionary type?
>
> I realize that in this context it is used for removing a specific key  
> from the current dictionary object.  But why call it pop and not  
> something more intuitive like remove or delete?

The naming for pop() method followed from the naming of the previously
existing popitem() method.  Neither "remove" nor "delete" would have
been a good name for a method that looked-up and returned a value as
well as mutating the dictionary.  The word "pop" on the other hand
strongly suggests both retrieval and mutation.

The notion that "pop" is only defined for stack operations is somewhat
pedantic.  We have also successfully used the name for sets, dicts,
and deques (success meaning that most people just "get it" and are
able to learn, use, read the name without difficultly).

The rationale for the pop() method was that the pattern "v=d[k]; del
d[k]" could be collapsed to a single call, eliminating a two
successive look-ups of the same key.  Looking back, this rationale is
questionable because 1) the second lookup is not expensive because the
first lookup put the relevant hash entries in the cache, and 2) the
lookup/delete pattern for dictionaries does not seem to arise often in
practice (it does come-up every now and then in the context of set
operations).

There was also a notion that threaded programming would benefit by
having lookup-then-delete as an atomic transaction.  It is unknown to
me whether that purported benefit has ever been realized.


Raymond Hettinger



From aisaac at american.edu  Fri Mar  9 18:29:45 2007
From: aisaac at american.edu (Alan Isaac)
Date: Fri, 09 Mar 2007 23:29:45 GMT
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05>
	<mailman.4817.1173389223.32031.python-list@python.org>
Message-ID: <J5mIh.26$qe5.12@trnddc05>

> Alan Isaac wrote:
> > I am brand new to pylint.
> > As a tab user, I want the tabs warning turned off.

"Robert Kern" <robert.kern at gmail.com> wrote in message
news:mailman.4817.1173389223.32031.python-list at python.org...
> doc/features.txt
> examples/pylintrc

The example is very helpful.
Thanks!
Alan




From dave.opstad at monotypeimaging.com  Fri Mar 30 16:13:36 2007
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Fri, 30 Mar 2007 13:13:36 -0700
Subject: Tkinter menu question--how to pass arguments
References: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
Message-ID: <dave.opstad-2AE2AD.13133630032007@reader0903.news.uu.net>

In article <85c10$460d65c8$4275d90a$19337 at FUSE.NET>,
 Kevin Walzer <kw at codebykevin.com> wrote:

> I'm having difficulty structuring a Tkinter menu entry. Here is the 
> command in question:
> 
> self.finkmenu.add_command(label='Update List of Packages', 
> command=self.authorizeCommand(self.scanPackages))
> 
> When I start my program, it crashes because it's trying to run the 
> command self.authorizeCommand. The reason I'm structuring it in this 
> fashion is that this command takes another command as an argument--in 
> this case, self.ScanPackages.
> 
> The basic structure of the program is that the self.authorizeCommand 
> function pops up a dialog box for a password; it then feeds the password 
> to the function that it takes as an argument, i.e. self.scanPackages.
> 
> I tried setting up the menu entry without the additional parameter, i.e. 
> command=self.authorizeCommand, but then when I try to run the command 
> from the menu, it complains there are not enough arguments. 
> Unsurprising, since self.authorizeCommand takes another function name as 
> an argument.
> 
> How can I structure the menu item to reflect the correct number of 
> arguments without it trying to execute the command?

If self.scanPackages exists as an attribute of self, why do you need to 
pass it in? If your command is just self.authorizeCommand, and that 
method makes use of self.scanPackages when it runs, then it all should 
work without your having to specify it here.

Dave


From bbbart at inGen.be  Sun Mar  4 14:47:28 2007
From: bbbart at inGen.be (Bart Van Loon)
Date: Mon, 5 Mar 2007 00:47:28 +0500
Subject: looking for Java final/Ruby freeze functionality in Python
References: <45eb1fdf$1@news.vo.lu>
Message-ID: <slrneum8ig.f10.bbbart@charles.inGen.islamabad>

It was Sun, 04 Mar 2007 20:38:16 +0100, when Antoine De Groote wrote:
> Hello,
>
> I've been googling for quite a while now but can't find anything about a 
> function/keyword to make a list (or something else) immutable. Could 
> anybody point me to docs about this matter or give me a reason why this 
> (apparently) doesn't exist in Python?

what about a tuple?

-- 
regards,
BBBart

   My family is dysfunctional and my parents won't empower me.  Consequently
I'm not self actualized.	  -- Calvin


From borntonetwork at gmail.com  Sat Mar  3 11:52:11 2007
From: borntonetwork at gmail.com (borntonetwork)
Date: 3 Mar 2007 08:52:11 -0800
Subject: qcombobox.findtext and matchflags.matchendswith
Message-ID: <1172940731.443430.161910@30g2000cwc.googlegroups.com>

Hi.

Using the PyQt4 library, I am trying to use the following
function("cbo" is a qtcombobox):

cbo.findText(searchStr, QtCore.MatchEndsWith)

If I don't use the "QtCore.MatchEndsWith", the function works
properly, but doesn't return partial matches ending with "searchStr".
If I use "QtCore.MatchEndsWith", I get the following error:

AttributeError: 'module' object has no attribute 'MatchEndsWith'

I've tried substituting the actual number that the enumerator
represents, which gives me a typeerror message complaining that the
argument has an invalid type.

Any suggestions?



From claird at lairds.us  Mon Mar 26 11:12:50 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 Mar 2007 15:12:50 +0000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
Message-ID: <ig4ld4-qrv.ln1@lairds.us>

In article <1174916838.757839.143310 at e65g2000hsc.googlegroups.com>,
Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:
			.
			.
			.
>> You can get the speed of fortran in Python by using libraries like
>> Numeric without losing the readability of Python.
>>
>
>Can you back this up with some source??
>Chris
>

Yes.

While evidence in computing science is ... well, the standards aren't
well established; still, I think you'll want to start with <URL:
http://www.sciencemag.org/cgi/content/abstract/279/5356/1525 >.  This
describes a supercomputer simulation that won awards in the '90s for
its performance.  The application itself is basically what Jean-Paul
recommended:  Python, with high-performance libraries written in C,
C++, and Fortran.


From johnjsal at NOSPAMgmail.com  Fri Mar 30 13:56:02 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Fri, 30 Mar 2007 13:56:02 -0400
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <euig08$fv3$2@news2.u-psud.fr>
References: <euid24$ugc$1@online.de> <euig08$fv3$2@news2.u-psud.fr>
Message-ID: <460d4f36$0$10784$c3e8da3@news.astraweb.com>

Laurent Pointal wrote:

> With Python:
> * pygame + build your drag'n drop features
> * if you like 3D, vpython.
> 
> 
> http://www.pygame.org/
> http://www.vpython.org/

Wow, vpython looks pretty  need. I'm messing around with it right now 
and reading the docs. But I can't find something...do you know how to 
clear the contents of the current scene? I checked the attributes of the 
display, but there is nothing like "empty" that would do it.


From almadhu at gmail.com  Sun Mar 18 08:32:19 2007
From: almadhu at gmail.com (Madhu Alagu)
Date: 18 Mar 2007 05:32:19 -0700
Subject: encoding - arabic(IBM 864)  to UNICODE
Message-ID: <1174221139.794726.224860@o5g2000hsb.googlegroups.com>

Hello,



How to convert IBM 864,IBM 420 & Nafitha(Arabic)  to UNICODE.


Thanks

Madhu Alagu



From gregor at hostgis.com  Wed Mar  7 11:45:44 2007
From: gregor at hostgis.com (Gregor Mosheh)
Date: Wed, 7 Mar 2007 09:45:44 -0700 (MST)
Subject: How to build a Windows service using win32?
Message-ID: <3802.168.103.93.50.1173285944.squirrel@maps.hostgis.com>

Giles Brown wrote:
> Yeah.  You've cleverly decided to simplify the "smallest
> possible python service" by removing the
> if __name__ == '__main__':

Ha ha. :)
Seriously, though, I removed that long after it was failing to work, and
have since replaced it and it didn't affect a thing.


Gabriel Genellina wrote:
> Have you installed the pywin32 package from
> https://sourceforge.net/projects/pywin32/ ?
> The code skeleton looks OK to me.

Indeed, I have win32 installed. :)

I'm used to writing wxPython apps, even a small-scale video game, but
services are a new and alien direction for me. :)

Now, I did stumble upon the solution to this one this morning, after a
fresh night of sleep: I re-ran "python tester.py install" I got a message
that the service had been updated, and now it runs! Hooray!

Any insight into why that would be the case? Does pythonservice.exe keep a
cached copy or some such, so I'll have to re-install the service after
code changes?




From facundo at taniquetil.com.ar  Mon Mar  5 10:43:56 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Mon, 5 Mar 2007 15:43:56 +0000 (UTC)
Subject: threading a thread
References: <es1srq$ngj$1@solaris.cc.vt.edu>
Message-ID: <eshdrr$pao$1@sea.gmane.org>

tubby wrote:

> I have a program written in Python that checks a class B network (65536 
> hosts) for web servers. It does a simple TCP socket connect to port 80 
> and times out after a certain periods of time. The program is threaded 
> and can do all of the hosts in about 15 minutes or so. I'd like to make 
> it so that I can check for other open ports (instead of just port 80) 
> and I'd like to thread the port checks as well.

So far, I understand that you have a program with multithreading, but it
only threads the host checking (because it actually scans one port
only).


> Right now I'm just prototyping and the threaded hosts portion works very 
> well for my needs. I'd just like to add a threaded ports check and 
> wanted to know if anyone had done something similar in Python.

What I do *not* understand if this is a question about:

- port checking (asume not, because the program already checks a port,
so you can actually see how it's done)

- threading (asume not, because the program already is multithreading,
so you can actually see how it's done)

- modifying your program (asume not, you did not copy it here).


So, for us be able to help you, what can not you do?

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/





From mail at microcorp.co.za  Thu Mar  8 01:24:59 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 8 Mar 2007 08:24:59 +0200
Subject: persistent fifo queue class
References: <3240528.rhEsMVbDK6@teancum> <554m4vF22dgrpU2@mid.uni-berlin.de>
	<4011626.Sbva7xkoP2@teancum>
Message-ID: <022901c7614a$9d6eb1a0$03000080@hendrik>

"David Bear" <da....bear at asu.edu> wrote:
> Diez B. Roggisch wrote:

> > Why don't you use a DB for that? If you want pickles, use a  blob
> > column. But all the rest - a defined protocol, stable server,
> > transactions - you get for free.
> > 
> > Diez
> 
> Thanks for the suggestion. I did think of this. Indeed the final destination
> of the data is in a db. However, the postsgresql server is on a separate
> box. It will be connected via a private lan. I was worried that possible
> network disruptions would cause either the web application to hang -- or
> data to just get lost. I was thinking along the lines is a message queue
> architecture, where the web app would push data directly onto a queue --
> and then a worker app would dequeue the data and handle it by sending it to
> the db server or otherwise.
> 
Have you looked at Pyro?

I think it could help to tie the boxes on the local LAN together,
with a 'Pusher' on the first box and a 'Popper' on the box where the 
final DB lives.  And Diez' DB could provide the persistence on the first
box.
The 'push' and 'pop' above are a bit of a misnomer, as Pyro will allow 
you to have a 'puller' on the final DB box to front end the DB.
I think a "double DB" architecture like that will be very robust as
Diez' DB can provide a "transactions queued, in process, and 
completed" log.

- Hendrik 





From kadeko at gmail.com  Tue Mar  6 04:41:59 2007
From: kadeko at gmail.com (looping)
Date: 6 Mar 2007 01:41:59 -0800
Subject: pytz2007c error
In-Reply-To: <1173171115.780320.203500@64g2000cwx.googlegroups.com>
References: <1173171115.780320.203500@64g2000cwx.googlegroups.com>
Message-ID: <1173174119.588427.315110@j27g2000cwj.googlegroups.com>

On Mar 6, 9:51 am, "looping" <kad... at gmail.com> wrote:
> Hi,
> Why this error ?
>
> >>> from pytz import timezone
> >>> eastern = timezone('US/Eastern')
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in <module>
>   File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
> \__init__.py", line 93, in timezone
>   File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
> \tzfile.py", line 33, in build_tzinfo
>     for trans in data[:timecnt]]
>   File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
> \tzinfo.py", line 27, in memorized_datetime
>     dt = datetime.utcfromtimestamp(seconds)
> ValueError: timestamp out of range for platform localtime()/gmtime()
> function
>
> I'm running python 2.5 on WinXP French with the egg from CheeseShop.
>
> Same error with all timezone (like timezone('Europe/Zurich'),
> timezone('Europe/Amsterdam'), ...) except a few one:>>> print timezone('UTC')
>
> UTC
>
> Is this a pytz problem or something I didn't understand ?

OK, the error come from datetime.utcfromtimestamp that doesn't support
negative value.
pytz try to pass -1633280400 to this function.

Is this a problem from Windows ?



From Stuart.Taylor at disney.com  Mon Mar 12 11:29:27 2007
From: Stuart.Taylor at disney.com (Taylor, Stuart)
Date: Mon, 12 Mar 2007 11:29:27 -0400
Subject: Readline()
Message-ID: <1E3F89921C854A49B8307B9716633F0105A516C0@SM-GBLO-XM32.emea.wdpr.disney.com>

I have been working on running an external process using
subprocess.popen for a few days.
The process is ran over the network to another machine.
One thing I have found is that if I perform readline() on the stdout it
will hang if the process loses connection.

I have tried a few things in a test example: one is to use stdin.write
then stdin.flush() which send a string that readline() will read and it
ends correctly but doesn't work on the project I need it to work on.
Another is to try using threads and ignoar the thread when  the process
has lost connection but this still leaves the open thread alive even
when the main app has finished.

I am relatively new to python and I may be making a fundemantal mistake
in my implementation, can anyone please inform me of whether sticking
with subprocess.popen and readline() is the correct procedure for this
sort of task?

And if anyone can point me in the correct implementation of this problem
I would be gratefull.


Thank you

Stuart
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From lbates at websafe.com  Mon Mar 12 10:14:54 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 12 Mar 2007 09:14:54 -0500
Subject: Formatted Input
In-Reply-To: <1173554949.335778.324720@8g2000cwh.googlegroups.com>
References: <1173554949.335778.324720@8g2000cwh.googlegroups.com>
Message-ID: <KcadnTNMyqvH_WjYnZ2dnUVZ_rTinZ2d@comcast.com>

Deep wrote:
> Hi all,
> I am a newbie to python
> I have an input of form
> <one number> space <another number>
> ie.
> 4 3
> how can i assign these numbers to my variables??
> 

Or with list comprehension:

n1, n2 = [int(n) for n in raw_input().split()]

Neither of these methods checks for errors (e.g. non-integers)

-Larry


From aleax at mac.com  Thu Mar 15 23:39:17 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 20:39:17 -0700
Subject: Eureka moments in Python
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <1hv19rb.5swqzb14dup51N%aleax@mac.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> wrote:

> I'd be interested in hearing people's stories of Eureka moments in Python,
> moments where you suddenly realise that some task which seemed like it
> would be hard work was easy with Python.

As a part of my process to decide whether Python was the right language
for me to use, right after reading the 1st edition of "Learning Python"
hot off the presses, I decided to invest a weekend getting a start on a
specific task -- a web app (CGI) to compute conditional probabilities of
suit divisions (for many possible conditions) in contract bridge.
Hard-coded English output was to be the "first iteration" -- then in a
second iteration, besides adding fancy conditions, I'd develop some
templating system and pick the language to use from the browser to
switch to an appropriate directory of templates for the user's language.

I didn't really think I'd finish the first iteration in the weekend, but
the conditions were favorable: wife and kids were out of town and the
larder well stocked with coffee, prosciutto, parmigiano, and bread.  So,
I could hack for a few hours before falling asleep on Friday night, and
about 16 hours each on Sat and Sun -- a total of 36 hours or such should
let me at least put some serious dent on the problem, if this language
did prove to be the right one for me.

I got home around 8pm), made myself prosciutto sandwiches, and got
going.

At about 4pm on Saturday (despite having gotten a normal night's sleep
in the meantime), I looked at what I had so far... the system as
originally envisioned, completed, with all kinds of conditions coded,
and working just fine, the general-purpose templating system all done
too as well as English, Italian and French templates to try it out, a
nice battery of unit-tests and integration-tests, and lots of
optimizations (such as, memoization for the factorial function) already
integrated too.

I had to face the facts: I had achieved in about 12 hours (including
time to brew myself coffee, prep sandwiches, and stroll to the bar for
an espresso to wake me up in the morning) over twice as much as I
thought, somewhat optimistically, I could have gotten done in 36.  And
that, in a language completely new to me, with nobody else around to
help me out (at that time, I didn't have an always-on net connection,
and I hadn't dialed in during those hours either).  [[the application
domain _was_ familiar to me, but I had factored that in as part of my
estimate of how long the whole task would take]].


_That_ was the "Eureka moment" that sold me on this newfangled
language...!


Alex


From Leo.Kislov at gmail.com  Mon Mar 26 23:31:27 2007
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 26 Mar 2007 20:31:27 -0700
Subject: Unicode zipping from Python code?
In-Reply-To: <mailman.5613.1174893680.32031.python-list@python.org>
References: <mailman.5613.1174893680.32031.python-list@python.org>
Message-ID: <1174966287.789621.168670@n59g2000hsh.googlegroups.com>

On Mar 26, 12:21 am, durumdara <durumd... at gmail.com> wrote:
> Hi!
>
> As I experienced in the year 2006, the Python's zip module is not
> unicode-safe.

I'd rather say unicode file names are not supported. Why? Because zip
format didn't support unicode file names upto 2006.

> With the hungarian filenames I got wrong result.
> I need to convert iso-8859-2 to cp852 chset to get good result.

So you solved the problem, didn't you?

> As I see, this module is "a command line tool" imported as extension.
>
> Now I search for something that can handle the characters good, or
> handle the unicode filenames.

You said you've got good result, so it's not clear what do you want.


> Does anyone knows about a python project that can do this?
> Or other tool what I can use for zipping intern. characters?

Zipping is only half of the problem. How are you going to unzip such
files?


  -- Leo



From beliavsky at aol.com  Mon Mar 26 21:14:50 2007
From: beliavsky at aol.com (Beliavsky)
Date: 26 Mar 2007 18:14:50 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <7o4ld4-qrv.ln1@lairds.us>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<7o4ld4-qrv.ln1@lairds.us>
Message-ID: <1174958090.292094.168150@e65g2000hsc.googlegroups.com>

On Mar 26, 10:16 am, cla... at lairds.us (Cameron Laird) wrote:
> In article <1174918424.125068.176... at y80g2000hsf.googlegroups.com>,Noma... at gmail.com <Noma... at gmail.com> wrote:

> >Is there a mac version??
> >Thanks
> >Chris
>
> Yes.
>
> Several, in fact--all available at no charge.  The Python
> world is different from what experience with Fortran might
> lead you to expect.

Your experience with Fortran is dated -- see below.

>
> I'll be more clear:  Fortran itself is a distinguished
> language with many meritorious implementations.  It can be
> costly, though, finding the implementation you want/need
> for any specific environment.

Gfortran, which supports Fortran 95 and a little of Fortran 2003, is
part of GCC and is thus widely available. Binaries for g95, also based
on GCC, are available for more than a dozen platforms, including
Windows, Mac OS X, and Linux. I use both and consider only g95 mature,
but gfortran does produce faster programs. Intel's Fortran compilers
cost about $500 on Windows and Mac OS and $700 on Linux. It's not
free, but I would not call it costly for professional developers.

Speaking of money, gfortran and g95 have free manuals, the latter
available in six languages
http://ftp.g95.org/ . Final drafts of Fortran standards, identical to
the official ISO standards, are freely available. The manual for Numpy
costs $40 per copy.



From paul at boddie.org.uk  Thu Mar  1 10:04:59 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 1 Mar 2007 07:04:59 -0800
Subject: design question: no new attributes
In-Reply-To: <54ligrF21q2biU1@mid.uni-berlin.de>
References: <8BIEh.1349$QI4.489@trnddc01>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08> <54ligrF21q2biU1@mid.uni-berlin.de>
Message-ID: <1172761499.192270.76130@z35g2000cwz.googlegroups.com>

On 28 Feb, 15:39, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> > However I will observe that
> > - entire languages are structured on the premise that dynamic
> > attribute creation can be hazardous
>
> Yup, and you are free to use one of them. And as an additional benefit, they
> will be more performant because you then can optimize the code further.

I think that's something many people miss: it can be desirable to
declare the range of attributes on instances "up front" for
optimisation purposes (in various languages other than Python), but
the advantages of not risking the occasional AttributeError shouldn't
be too readily discarded either. I'm not sure where the different
tools stand on this front, but second-guessing invalid accesses to
attributes is a completely different level to just identifying dodgy
accesses to globals or locals, along with dubious imports and "bad
practice" programming styles consisting of one or more of those more
detectable things.

Paul



From tjreedy at udel.edu  Sun Mar  4 22:36:38 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 4 Mar 2007 22:36:38 -0500
Subject: Alternatives for Extracting EXIF and JPEG Data from Images
References: <45EB3404.3030401@cox.net><mailman.4661.1173053793.32031.python-list@python.org>
	<45EB7DEC.4080702@cox.net>
Message-ID: <esg382$m09$1@sea.gmane.org>


"Roger" <crosseyedpenguin at cox.net> wrote in message 
news:45EB7DEC.4080702 at cox.net...
| Max Erickson wrote:
| > I don't know what the format is, etc, but jpegs I open with PIL have a
| > quantization attribute, e.g:
| >
| >>>> im.quantization

| Thank you, I wasn't aware of the quantization method.  I was unable to
| find any documentation for it.

The builtin dir(ob) function returns a list of attributes of ob.  Great for 
discovering things that are not documented.

tjr





From mail at microcorp.co.za  Fri Mar 30 01:29:21 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 30 Mar 2007 07:29:21 +0200
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com><56prsrF2am4a1U1@mid.uni-berlin.de><mailman.5660.1174978878.32031.python-list@python.org><slrnf0hjhg.php.nick@irishsea.home.craig-wood.com><mailman.5697.1175060331.32031.python-list@python.org><slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com><mailman.5746.1175160012.32031.python-list@python.org>
	<slrnf0n5b4.qr8.nick@irishsea.home.craig-wood.com>
Message-ID: <005f01c772a2$89cc8960$03000080@hendrik>

 "Nick Craig-Wood" <n...k at cra..od.com> wrote:

> I'd like there to be something which works well enough for day to day
> use.  Ie doesn't ever wreck the internals of python.  It could have
> some caveats like "may not timeout during C functions which haven't
> released the GIL" and that would still make it very useable.

I second this (or third or whatever if my post is slow).
It is tremendously useful to start something and to be told it has timed
out by a call, rather than to have to unblock the i/o yourself and
to "busy-loop" to see if its successful.  And from what I can see
the select functionality is not much different from busy looping...

- Hendrik



From mail at timgolden.me.uk  Sun Mar 18 12:24:24 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Sun, 18 Mar 2007 16:24:24 +0000
Subject: screen size/resolution in win32 in python
In-Reply-To: <1174225888.752421.56410@l75g2000hse.googlegroups.com>
References: <1174225888.752421.56410@l75g2000hse.googlegroups.com>
Message-ID: <45FD67B8.1040705@timgolden.me.uk>

adri80386 wrote:
> Hi:
> 
> How I can get the current screen resolution settings (screen.width and
> screen.heigth in pixels) in python.

You want the GetSystemMetrics function from the pywin32
packge:

<code>
from win32api import GetSystemMetrics
print "width =", GetSystemMetrics (0)
print "height =",GetSystemMetrics (1)

</code>


From carsten at uniqsys.com  Fri Mar 30 21:55:42 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 30 Mar 2007 21:55:42 -0400
Subject: I can't get multi-dimensional array to work...
In-Reply-To: <1175290442.523224.129490@b75g2000hsg.googlegroups.com>
References: <1175288195.207852.150320@p15g2000hsd.googlegroups.com>
	<1175289837.359022.62220@o5g2000hsb.googlegroups.com>
	<1175290442.523224.129490@b75g2000hsg.googlegroups.com>
Message-ID: <1175306142.3362.10.camel@localhost.localdomain>

On Fri, 2007-03-30 at 14:34 -0700, erikcw wrote:
> On Mar 30, 5:23 pm, FlipFish2... at yahoo.com wrote:
> > I haven't tested it, but superficially I'd suggest giving this a try:
> >
> > def endElement(self, name):
> >         if name == 'row' :
> >             if not self.data.has_key(self.parent):
> >                 self.data[self.parent] = {}
> >             if not self.data[self.parent].has_key(self.child):
> >                 self.data[self.parent][self.child] = []
> >             self.data[self.parent]
> > [self.child].append((self.creativeid, self.clicks, self.imps))
> 
> That seems to have done the trick!  I can't believe I spent all
> afternoon trying to figure that out!!  Thanks a million!

Since you're already using dictionaries, as an alternative solution you
could construct a single dictionary that is keyed on two-dimensional
tuples (also known as ordered pairs). Combine that with the setdefault
method to initialize new entries and you end up with something like
this:

def endElement(self, name):
   if name == 'row':
      entry = self.data.setdefault((self.parent,self.child),[])
      entry.append(...)

-Carsten




From s99999999s2003 at yahoo.com  Wed Mar 28 20:09:29 2007
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 28 Mar 2007 17:09:29 -0700
Subject: which methods to use?
Message-ID: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>

  hi
which is the best methods to use for list copying. using list() , [:]
or create list through list comprehension. what are the differences
between these ?
thanks



From h.b.furuseth at usit.uio.no  Fri Mar  2 10:29:24 2007
From: h.b.furuseth at usit.uio.no (Hallvard B Furuseth)
Date: Fri, 02 Mar 2007 16:29:24 +0100
Subject: Sorting strings containing special characters (german 'Umlaute')
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>
Message-ID: <hbf.20070302v8dv@bombur.uio.no>

DierkErdmann at mail.com writes:
> For sorting the letter "?" is supposed to be treated like "Ae",
> therefore sorting this list should yield
> l = ["Aber, "?rger", "Beere"]

Are you sure?  Maybe I'm thinking of another language, I thought ? shold
be sorted together with A, but after A if the words are otherwise equal.
E.g. Antwort, ?rger, Beere.  A proper strcoll handles that by
translating "?rger" to e.g. ["Arger", <something like "E\0\0\0\0">],
then it can sort first by the un-accentified name and then by the rest.

-- 
Hallvard


From simon at brunningonline.net  Fri Mar  9 10:46:06 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Fri, 9 Mar 2007 15:46:06 +0000
Subject: Is this right? Multiple imports of same module.
In-Reply-To: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
Message-ID: <8c7f10c60703090746o68dcee6clb32b7c055c8ffd8@mail.gmail.com>

On 3/9/07, Lou Pecora <pecora at anvil.nrl.navy.mil> wrote:
>
> *In mod1.py
>
> import mymodule
>
> *In mod2.py
>
> import mymodule
>
> *In mod3.py
>
> import mymodule as MM
>
> Then mymodule is imported only once, but each module has access to it
> through the module name (mod1 and mod2) and the alias MM (mod3).  Is
> that right?

Yup, and occasionally it's useful to do stuff like this...

> I was concerned about multiple imports and efficiency.

... but not for this reason. Subsequent imports of an already loaded
module are very quick.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/


From nagle at animats.com  Thu Mar 29 02:50:49 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 28 Mar 2007 23:50:49 -0700
Subject: BeautifulSoup vs. Microsoft 
Message-ID: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>

Here's a construct with which BeautifulSoup has problems.  It's
from "http://support.microsoft.com/contactussupport/?ws=support".

This is the original:


<a href="http://www.microsoft.com/usability/enroll.mspx"
     id="L_75998"
     title="<!--http://www.microsoft.com/usability/information.mspx->"
     onclick="return MS_HandleClick(this,'C_32179', true);">
     Help us improve our products
</a>


And this is what comes back after parsing with BeautifulSoup
and using "prettify":


                     <a href="http://www.microsoft.com/usability/enroll.mspx" 
id="L_75998" 
title="&lt;!--http://www.microsoft.com/usability/information.mspx-&gt;">
                      <br clear="all" style="line-height: 1px; overflow: hidden" />
                      <table id="msviFooter" width="100%" cellpadding="0" 
cellspacing="0">
                       <tr valign="bottom">

                        <td id="msviFooter2" 
style="filter:progid:DXImageTransform.Microsoft.Gradient(startColorStr='#FFFFFF', 
endColorStr='#3F8CDA', gradientType='1')">
                         <div id="msviLocalFooter">
                          <nobr>
                          </nobr>
                         </div>
                        </td>
                       </tr>
                      </table>
                     </a>

All that other stuff is in the neighborhood, but not in that <a> tag.

Strictly speaking, it's Microsoft's fault.

     title="<!--http://www.microsoft.com/usability/information.mspx->"

is supposed to be an HTML comment.  But it's improperly terminated.
It should end with "-->".  So all that following stuff is from what
follows the next "-->" which terminates a comment.

It's so Microsoft.

Unfortunately, even Firefox accepts bad comments like that.

Anyway, a BeautifulSoup question.  "findall(text=True)" collects comments,
processing instructions, etc. as well as real text.  What's the right way
to collect ordinary text only?

					John Nagle





From gagsl-py2 at yahoo.com.ar  Mon Mar 26 11:34:59 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: 26 Mar 2007 08:34:59 -0700
Subject: Python object overhead?
In-Reply-To: <mailman.5634.1174922041.32031.python-list@python.org>
References: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
	<20070323220459.GS13084@performancedrivers.com>
	<mailman.5634.1174922041.32031.python-list@python.org>
Message-ID: <1174923299.091303.145010@l75g2000hse.googlegroups.com>

On Mar 26, 12:13 pm, "Matt Garman" <matthew.gar... at gmail.com> wrote:
> On 3/23/07, Jack Diederich <jackd... at jackdied.com> wrote:
>
> > If you make the record a new style class (inherit from object) you can
> > specify the __slots__ attribute on the class.  This eliminates the per
> > instance dictionary overhead in exchange for less flexibility.
>
> When you say "new style class", do you mean that the __slots__ feature
> is only available in a newer version of Python?  Unfortunately, I'm
> stuck on 2.3.4 for this project.

"new style" classes are available since Python 2.2. You declare a new-
style class just by inheriting from object. Among other things, they
have properties, and the above menctioned __slots__ optimization.




From deets at nospam.web.de  Mon Mar  5 11:38:39 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 Mar 2007 17:38:39 +0100
Subject: Python GUI + OpenGL
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
	<54r59qF228m8bU1@mid.uni-berlin.de>
	<slrneuo3lh.bth.f98dawa@shii.medic.chalmers.se>
Message-ID: <552vcfF2339mvU1@mid.uni-berlin.de>

Dag wrote:

> On Fri, 02 Mar 2007 18:30:34 +0100, Diez B. Roggisch <deets at nospam.web.de>
> wrote:
>> Achim Domma wrote:
>>
>>> Hi,
>>> 
>>> I'm developing a GUI app in Python/C++ to visualize numerical results.
>>> Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there
>>> are no windows binaries for Python 2.5 for quite some time now.
>>> 
>>> I need a OpenGL context without restrictions and some settings dialogs.
>>> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set
>>> of tools/libs?
>>
>> PyQt, but then there is the licensing question of course.
> 
> I'm facing a similar problem.  Would you care to explain why PyQt is
> better in this particular case.  I've used both PyQt and wx for 'normal'
> GUI programming (but I'm more familiar with wx) so I know about their
> difference in general.  But why is PyQt better than wx for working with
> OpenGL?

I didn't say so. I just pointed out an alternative, as the OP had issues
with obtaining binary packages for wx + py2.5

Beside that, I do love the Qt library and would always use it in preference
to wx, but this is a general thing and by no means tied to the
OpenGL-programming. After all, that actually is done using PyOpenGL

Diez


From aleax at mac.com  Thu Mar 15 10:56:28 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 07:56:28 -0700
Subject: dict.items() vs dict.iteritems and similar questions
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
Message-ID: <1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>

Steve Holden <steve at holdenweb.com> wrote:

> bearophileHUGS at lycos.com wrote:
> > Laurent Pointal:
> >> you may prefer range/items when processing of the result
> >> value explicitly need a list (ex. calculate its length)
> > 
> > Creating a very long list just to know the len of an iterator is
> > barbaric, so sometimes I use this:
> > 
> > def leniter(iterator):
> >     if hasattr(iterator, "__len__"):
> >         return len(iterator)
> >     nelements = 0
> >     for _ in iterator:
> >         nelements += 1
> >     return nelements
> > 
> Of course this is a little like the Heisenberg uncertainty principle if
> the iterator has no __len__ attribute - once you know how long it is you
> no longer have access to the elements. Or did I miss something?

Right.  However, "return sum(1 for _ in iterator)" may be a handier way
to express the same desctructive semantics as the last 4 lines here.


Alex


From DustanGroups at gmail.com  Mon Mar 19 17:57:09 2007
From: DustanGroups at gmail.com (Dustan)
Date: 19 Mar 2007 14:57:09 -0700
Subject: Private data
In-Reply-To: <45fee4c2$0$4541$426a34cc@news.free.fr>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<45fee4c2$0$4541$426a34cc@news.free.fr>
Message-ID: <1174341429.607663.208270@n59g2000hsh.googlegroups.com>

On Mar 19, 3:06 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Dustan a ?crit :
>
> >http://dustangroups.googlepages.com/privateattributesinpython
>
> May I report a small typo ?

Absolutely. I might even fix it.

> """
>      def interanalDataDecorator(func):
> """
>
> Talking about private attributes... !-)

Thanks.



From michael at jedimindworks.com  Sat Mar 24 04:29:05 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sat, 24 Mar 2007 03:29:05 -0500
Subject: execution speed increase after compile py code into exe?
In-Reply-To: <loom.20070324T091014-216@post.gmane.org>
References: <loom.20070324T091014-216@post.gmane.org>
Message-ID: <111E1841-7923-4CDE-884E-F631274B02B9@jedimindworks.com>

>
> would there be any speed increase in code execution after python  
> code being
> compiled into exe file with py2exe?
>

No.  I would expect slower startup followed by the same code  
execution time you'd get from running normally (not that I've  
actually tested it, mind you).

regards,
Michael

---
Our network was brought down by a biscuit??? --Steven D'Aprano





From michael.tiller at gmail.com  Mon Mar  5 18:01:21 2007
From: michael.tiller at gmail.com (michael.tiller at gmail.com)
Date: 5 Mar 2007 15:01:21 -0800
Subject: ANN: PyDSTool now compatible with numpy 1.0.1,
	scipy 0.5.2 and 64-bit CPUs.
In-Reply-To: <mailman.4607.1172855235.32031.python-list@python.org>
References: <mailman.4239.1172001680.32031.python-list@python.org>
	<2ff9b$45db652f$d443bb3a$29705@news.speedlinq.nl>
	<1172579296.156674.203150@j27g2000cwj.googlegroups.com>
	<mailman.4607.1172855235.32031.python-list@python.org>
Message-ID: <1173135681.180640.209810@30g2000cwc.googlegroups.com>


On Mar 2, 12:07 pm, "Rob Clewley" <r... at cornell.edu> wrote:
> Mike,
>
> Yes, that is a pretty fair description of our support for symbolics
> using Python's own inheritance. Our ModelSpec classes provide only an
> elementary form of inheritance, polymorphism and type checking. We
> hope to expand our existing support for hybrid/DAE systems at the
> level of our ModelSpec model-building tools. All ideas and code
> contributions are welcome!

It is a fair amount of work to figure out all the details for trying
to come up with a clean way of describing hybrid DAE systems for
usability, expressiveness, efficiency, etc (based on my 7 year
involvement in the 10 year and counting Modelica effort).  As a user,
what I would find more interesting would be a python implementation
that could import such descriptions and then work with them (rather
than expressing them in Python).  There is a ton of interesting stuff
in the area of UI, symbolic methods, etc. that is completely
independent of the specification side.  It seems to me the
specification stuff bogs down the effort.

By "outsourcing" all the specification stuff you can offload that
burden and then focus on python based tools for introspection,
symbolic manipulation, visualization, graphical model construction,
etc.  I don't know your ultimate goals but it just seems to me you'll
get their faster by co-opting the existing work.  Not only that, if
you interest is in studying complex dynamic systems there is a
mountain of stuff already out there (in the form of fully specified
models) that you can incorporate.

For what it's worth.

> Cheers,
> Rob

--
Mike



From robert.kern at gmail.com  Wed Mar  7 16:17:03 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 07 Mar 2007 15:17:03 -0600
Subject: Is numeric keys of Python's dictionary automatically sorted?
In-Reply-To: <esn8ir$c8p4$1@netnews.upenn.edu>
References: <esn6nu$c8nt$1@netnews.upenn.edu>	<1173300100.810023.223130@t69g2000cwt.googlegroups.com>
	<esn8ir$c8p4$1@netnews.upenn.edu>
Message-ID: <esna4f$11o$1@sea.gmane.org>

John wrote:
> Then is there anyway to sort the numeric keys and avoid future implemetation 
> confusion?

sorted(mydict.keys())

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From http  Thu Mar  8 20:40:15 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 17:40:15 -0800
Subject: merits of Lisp vs Python
References: <1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<RxPHh.10406$tD2.5273@newsread1.news.pas.earthlink.net>
	<mailman.4809.1173377788.32031.python-list@python.org>
	<7xabynh9af.fsf@ruckus.brouhaha.com>
	<kO2Ih.1307$yW.914@newssvr11.news.prodigy.net>
Message-ID: <7xhcsvtcsg.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
>      There's denial in the Python community that this is a problem,
> but it is.  The Ruby on Rails people get it; they work to provide a
> seamless experience for web developers.  Which is why their market
> share is way up over two years ago.

I do know that a big Perl site that I hang out on (but am not involved
with the software for) decided to redo its software and had a big
discussion of what to use.  Python/Django was a serious contender but
in the end they chose Ruby on Rails.  I didn't pay too close attention
to the exact rationale but it was somewhat disappointing and yet
unsurprising.


From jgodoy at gmail.com  Sat Mar 17 19:30:45 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 17 Mar 2007 20:30:45 -0300
Subject: MIME Magic
References: <1174172570.473458.215460@y80g2000hsf.googlegroups.com>
Message-ID: <87fy834fdm.fsf@gmail.com>

"Samuel" <knipknap at gmail.com> writes:

> Hi,
>
> How can I determine the type of a file from "magic bytes", similar to
> what the "file" command on unix does? I found
>
> http://docs.python.org/lib/module-mimetypes.html
>
> but this only seems to use the filename (extension) for finding the
> type. Any hints?

I'd start by taking a look at "file"'s code. :-)

The thing is being able to identify the signatures of several different types
of files.  Here's some help for you:
http://www.garykessler.net/library/file_sigs.html

And here's an example of an authoritative source for that table:
http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html 



-- 
Jorge Godoy      <jgodoy at gmail.com>


From gregpinero at gmail.com  Wed Mar 14 23:59:26 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 14 Mar 2007 20:59:26 -0700
Subject: spawn process in a new console window
In-Reply-To: <1173923782.156260.299930@p15g2000hsd.googlegroups.com>
References: <1173923782.156260.299930@p15g2000hsd.googlegroups.com>
Message-ID: <1173931166.767205.220880@l77g2000hsb.googlegroups.com>

On Mar 14, 9:56 pm, egla... at gmail.com wrote:
> Hello,
>
> I have a script that launches a sequence of other programs, some GUI,
> some console.  I'd like the console programs to launch in their own
> console window, instead of all of them sharing the script's console.
> How do I do that?
>

Would the subprocess module help here?  It's available in Python 2.4
onwards.  I think it's supposed to be a one stop shop for all your
external application launching needs (Python group, please correct me
if I'm wrong here).

-Greg



From http  Thu Mar 15 12:23:52 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 08:23:52 -0800
Subject: looking for a simple crypto library
References: <mailman.5125.1173940891.32031.python-list@python.org>
Message-ID: <7xfy86qxuv.fsf@ruckus.brouhaha.com>

"P?nar Yanarda?" <moonquelle at gmail.com> writes:
> I'm looking for a crypto library which can simply:
> 
> - extracts a public key from a (X.509) certificate,
> 
> - supports public-key algorithms.

www.trevp.com/tlslite


From deets at nospam.web.de  Mon Mar 12 07:40:22 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 12:40:22 +0100
Subject: programmatically manipulation environment variables of the
	calling shell
References: <mailman.4959.1173695641.32031.python-list@python.org>
	<55kp0cF25ntciU1@mid.uni-berlin.de>
	<mailman.4963.1173699510.32031.python-list@python.org>
Message-ID: <55ksh7F25654dU1@mid.uni-berlin.de>

Michal 'vorner' Vaner wrote:

> Hello,
> 
> On Mon, Mar 12, 2007 at 11:40:11AM +0100, Diez B. Roggisch wrote:
>> Maxim Veksler wrote:
>> > I'm trying to write a python script that would allow me to manipulate
>> > shell variables of the calling shell. I'm trying to write some logic
>> > that would know to add LD_LIBRARY_PATH to the users environment.
>> 
>> It's not possible, OS restrictions - you are not allowed to alter the
>> environment of a parent process.
> 
> Actually, you are able to modify only your own environment (and call a
> new process with any possible environment). And the restrictions seem to
> me rather technical - the process would have to change its behaviour
> each time it changes.

Not only technical - they are important security-wise - you could try and
make a parent process use a modified library that would e.g. authenticate
users without passwords.

Diez


From claird at lairds.us  Fri Mar 30 12:02:01 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 30 Mar 2007 16:02:01 +0000
Subject: Memory testing in Python
References: <1175242912.103313.99110@n59g2000hsh.googlegroups.com>
	<599vd4-1rg.ln1@lairds.us>
	<1175266111.159492.131320@l77g2000hsb.googlegroups.com>
Message-ID: <psovd4-pau.ln1@lairds.us>

In article <1175266111.159492.131320 at l77g2000hsb.googlegroups.com>,
mkPyVS <mikeminer53 at hotmail.com> wrote:
>>While I have a great deal of interest in memory management,
>>my general reaction to your question as you've posed it is,
>>"Don't; concentrate for now on good Python style."
>
>I agree but for monitoring...
>
>I've had good luck with executing a popen to grab and parse output
>from ps -Af and pass it your own process ID as the search. It adds
>overhead to the cpu exec time but it is much less than 1sec so you
>won't see it.
>

Fair enough.  

Did you intend to suggest "ps -F"?  While ps remains not-so-well
standardized, I know of no version where "ps -Af" details *memory*
usage.

Parsing can be simplified with such invocations as
    ps -o pid -o rss -o size -o cmd
(which can itself be rewritten in various ways, depending on the
flavor of ps involved).


From bearophileHUGS at lycos.com  Sat Mar 17 14:43:41 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 17 Mar 2007 11:43:41 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174154723.569760.256000@y66g2000hsf.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<1174075514.144163.211660@o5g2000hsb.googlegroups.com>
	<1174154723.569760.256000@y66g2000hsf.googlegroups.com>
Message-ID: <1174157021.427429.325030@y66g2000hsf.googlegroups.com>

n00m:
> i have no NumPy to test it...
> without Psyco Anton's code is the winner: ~48sec vs ~58sec of my code
> But with Psyco my runtime is ~28sec; Anton's - ~30sec (PC: 1.6 ghz,
> 512 mb)
> Not so bad.. keeping in mind that 256000 billions quadruplets to
> check :)

I have oiled it a bit, you can try the speed of this too (for dicts in
is always faster than has_key).

from collections import defaultdict
import time, psyco

def main():
    sch = 0
    q,w,e,r = [],[],[],[]
    h = defaultdict(int)

    datafile = file("m1000.txt")
    datafile.next()
    xrows = (map(int, line.split()) for line in datafile)
    q, w, e, r = zip(*xrows)

    for x in q:
        for y in w:
            h[x+y] += 1

    for x in e:
        for y in r:
            if -x-y in h:
                sch += h[-x-y]

    print sch

t = time.clock()
psyco.full()
main()
print round(time.clock() - t, 2), "secs"



From parsons.nicholas1 at gmail.com  Fri Mar  2 18:01:19 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Fri, 2 Mar 2007 18:01:19 -0500
Subject: classes and functions
In-Reply-To: <e416e10c0703021426h68e13d87qeab5a61d36980c2@mail.gmail.com>
References: <e416e10c0703021426h68e13d87qeab5a61d36980c2@mail.gmail.com>
Message-ID: <56BA4C5E-1C8D-406D-AD6E-C492F2487792@gmail.com>

Hi Claire,

That is the beauty of using Python.  You have a choice of using  
classes and traditional OOP techniques or sticking to top level  
functions.  For short, small scripts it would probably be overkill to  
use classes.  Yet the programmer still has classes in his tool chest  
if he/she is writing code that is going to be reused in larger  
projects.  In contrast, languages like Java force you into doing  
everything with classes.

Another good resource to read is "Learning Python" by Mark Lutz and  
David Ascher if you want to learn more about python.

Hope this helps...

--Nick



On Mar 2, 2007, at 5:26 PM, Silver Rock wrote:

> Friends,
>
> I don?t see why using classes.. functions does everything already. I
> read the Rossum tutotial and two other already.
>
> Maybe this is because I am only writing small scripts, or some more
> serious misunderstandings of the language.
>
> Please give me a light.
>
> thanks guys,
> Claire
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From Nomad.C at gmail.com  Mon Mar 26 09:20:32 2007
From: Nomad.C at gmail.com (Nomad.C at gmail.com)
Date: 26 Mar 2007 06:20:32 -0700
Subject: Fortran vs Python - Newbie Question
Message-ID: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>

OK...
I've been told that Both Fortran and Python are easy to read, and are
quite useful in creating scientific apps for the number crunching, but
then Python is a tad slower than Fortran because of its a high level
language nature, so what are the advantages of using Python for
creating number crunching apps over Fortran??
Thanks
Chris



From aahz at pythoncraft.com  Tue Mar 20 13:32:40 2007
From: aahz at pythoncraft.com (Aahz)
Date: 20 Mar 2007 10:32:40 -0700
Subject: Choosing new-style vs classic classes (was Re: any ways to judge
	whether an object is initilized or not in a class)
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
	<1hv9lqf.19nfi5y1hv1y4gN%aleax@mac.com>
	<pan.2007.03.20.17.08.22.579017@REMOVE.THIS.cybersource.com.au>
Message-ID: <etp5ro$399$1@panix3.panix.com>

In article <pan.2007.03.20.17.08.22.579017 at REMOVE.THIS.cybersource.com.au>,
Steven D'Aprano  <steve at REMOVE.THIS.cybersource.com.au> wrote:
>On Tue, 20 Mar 2007 08:27:07 -0700, Alex Martelli wrote:
>>
>> You should always use new-style classes in order to avoid having to stop
>> and make a decision each time you code a class -- having to stop and ask
>> yourself "do I need any of the many extra features of new-style classes
>> here, or will legacy classes suffice?" each and every time.
>
>I can sympathize with your argument. I have taught myself to _always_
>indicate when turning the car, even when I don't need to. I do it without
>thinking, even when turning from my own driveway into my garage (much to
>my wife's amusement). And that way, I don't have to think on the road "do
>I need to indicate now or not?", I just do it.
>
>Rather than keep arguing my case (life is short...) I'll just mention that
>both Fredrik Lundh and Aahz were very dismissive of the suggestion that
>people should stop using classic classes back in July 2005.
>
>http://www.thescripts.com/forum/thread25853.html
>
>e.g. Aahz wrote: "There's a big difference between being gung-ho on
>new-style classes and telling people to stop using old-style classes."
>
>Have they changed their mind since then? Not that I'm suggesting that
>their opinions outweigh Alex's, but I'm not sure that the situation
>vis-a-vis classes has changed that much since 2005. If it has, perhaps I
>should be revising my opinion too.

My mind has not changed, and it has since been enshrined in _Python for
Dummies_.  ;-)  One point that I should make clear, because I think it
plays a large part of why Fredrik and I differ from Alex: my code at work
still runs on Python 2.2, which I believe should be avoided for heavy use
of new-style classes.  (The differences in new-style classes between 2.2
and later versions are small but significant, and I *don't* want to have
to think about them because we also use 2.3 at work.)  I believe Fredrik
still supports Python 1.5.2.  If you only support 2.3 and later,
suggesting a complete switchover to new-style classes becomes more
reasonable.

Moreover, my codebase at work started with Python 1.4, and upgrading it
all to correctly work with new-style classes would be a monumental
undertaking.  From my POV, as long as the bulk of the standard library is
still based on classic classes, that undertaking is not worth it.

I'm not quite as habitual as you are about turn signals, but I'm pretty
similar...
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From cmfvulcanius at gmail.com  Fri Mar  9 09:28:15 2007
From: cmfvulcanius at gmail.com (Vulcanius)
Date: 9 Mar 2007 06:28:15 -0800
Subject: Reading a portion of a file
In-Reply-To: <1173407894.702241.58660@30g2000cwc.googlegroups.com>
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
	<1173372768.823896.32710@n33g2000cwc.googlegroups.com>
	<1173375977.853461.68240@v33g2000cwv.googlegroups.com>
	<1173376256.933492.71410@c51g2000cwc.googlegroups.com>
	<1173378944.595861.190980@c51g2000cwc.googlegroups.com>
	<1173407894.702241.58660@30g2000cwc.googlegroups.com>
Message-ID: <1173450495.712801.18680@v33g2000cwv.googlegroups.com>

Here is the code I've come up with. Please feel free to critique it
and let me know what you would change. Also, as you can see I call
"open(SERVER,'r')" twice; but I want to only call it once, what would
the best way to do this be?

------------------------------------------------------------

import re

SERVER = "192.168.1.60"

# Pull all data from server file.
FILE = open(SERVER,'r')
ALLINFO = FILE.read()

# Grab a list of all sections in the server file.
SECTIONS = re.findall("(?m)^\#VS:\w*:.*:", ALLINFO)

# Remove duplicates from the list.
if SECTIONS:
   SECTIONS.sort()
   LAST = SECTIONS[-1]
   for I in range(len(SECTIONS)-2, -1, -1):
       if LAST==SECTIONS[I]: del SECTIONS[I]
       else: LAST=SECTIONS[I]

# Pull data from each section and assign it a dictionary item.
# Data can be called using SECTIONDICT['section'] i.e
SECTIONDICT['df']
SECTIONDICT = {}
for SECT in SECTIONS:
    PRESECTNAME1 = SECT[9:len(SECT) - 1]
    PRESECTNAME2 = PRESECTNAME1.split("/")
    SECTNAME = PRESECTNAME2[len(PRESECTNAME1.split("/")) - 1]
    START = SECT + "START"
    STOP = SECT +  "STOP"
    for LINE in open(SERVER,'r'):
        LINE = LINE.strip()
        if START in LINE:
            SECTIONLISTTEMP = []
        elif STOP in LINE:
            SECTIONDICT[SECTNAME] = SECTIONLISTTEMP
            SECTIONLISTTEMP = []
            print "-" * 80
            print "SECTION: %s" % SECTNAME
            print SECTIONDICT[SECTNAME]
        else:
            if LINE:
                SECTIONLISTTEMP.append(LINE)

FILE.close()

------------------------------------------------------------



From mail at microcorp.co.za  Fri Mar 30 02:33:18 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 30 Mar 2007 08:33:18 +0200
Subject: Weird behavior in search in a list
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
Message-ID: <006101c772a2$8b77c860$03000080@hendrik>

"Su Y" <s...ncn at gmail.com> wrote:

> I want find the first number in extend[] which is larger than num, so
> I wrote:
> def find(num):
>     count=0
>     for elem in extend:
>         if elem<num:
>             count+=1
>     return count
> 
> I found that if extend[] is monotonous, like [1.1, 2.3, 3.2, 4.5,
> 5.6],
> it works fine: find(4) returns 3, extend[3] is 4.5.
> But, if extend[] is not monotonous, like [1.1, 2.3, 3.2, 4.5, 5.6,
> 4.6, 3.4, 2.1, 0.3],
> find(4) returns 6, extend[6] is 3.4!
> 
> what's going on here? I really can't understand....

Hint: extend[0]  is1.1
Hint: extend[7] is 2.1
Hint: 2.1 is less than 4

You have to stop counting and come out of the loop when you find the 
first one - what your function is doing is counting the elements less than
num, not finding the first one that is.

hth - Hendrik




From goodTweetieBird at hotmail.com  Wed Mar 21 13:04:47 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 10:04:47 -0700
Subject: Delete a function
In-Reply-To: <mailman.5405.1174495228.32031.python-list@python.org>
References: <1174494159.024910.151540@l75g2000hse.googlegroups.com>
	<mailman.5405.1174495228.32031.python-list@python.org>
Message-ID: <1174496687.142300.205350@n76g2000hsh.googlegroups.com>

On Mar 21, 11:37 am, Steve Holden <s... at holdenweb.com> wrote:
> gtb wrote:
> > After a function has been imported to a shell how may it be deleted so
> > that after editing it can reloaded anew?
>
> Use the built-in reload() function to reload the module that defines the
> function.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com

Thanks, tried that now and get nameError: with the following.

import sys
sys.path.append("c:\maxq\testScripts")

from CompactTest import CompactTest
from compactLogin import dvlogin

reload(compactLogin)



From inq1ltd at verizon.net  Thu Mar  8 20:03:13 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 08 Mar 2007 20:03:13 -0500
Subject: writing dictionary to file
In-Reply-To: <677146.76946.qm@web7811.mail.in.yahoo.com>
References: <677146.76946.qm@web7811.mail.in.yahoo.com>
Message-ID: <200703082003.13915.inq1ltd@verizon.net>

On Thursday 08 March 2007 14:40, kavitha thankaian 
wrote:
> Hi Simon,
>
>   iam till here:
>
>   dorc=some['DorC']
>   amount=some['amount']
>   f=open("logfile.txt", "w")
>   if dorc =='C':
>    a = -(amount)
> if dorc == 'D':
>    b = amount
>    sum=a + b
>    if sum == 0:
>        f.writelines("name:")
>        f.writelines("%s" %some['name'])
>        f.writelines("credit:")
>        f.writelines("%s" % amount)
>
>   but i see an empty file opened,,,
>
>   kavitha
>
>   Simon Brunning <simon at brunningonline.net>
> wrote:
>
>   On 3/8/07, kavitha thankaian wrote:
> > can anyone help me???
>
> I'm sure we can. How far have you got so far?

try
 f=open("logfile.txt", "w")
 f.write('name')
 f.write('\n')
 f.write(('credit(')
 f:close()

jim-on-linux
http:\\www.inqvista.com



From arkanes at gmail.com  Mon Mar  5 14:06:08 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 5 Mar 2007 13:06:08 -0600
Subject: Project organization and import
In-Reply-To: <1173119492.198000.252500@v33g2000cwv.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
Message-ID: <4866bea60703051106q4beb924lb4671e457cabb110@mail.gmail.com>

On 5 Mar 2007 10:31:33 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 5, 9:15 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > That's actually the exact benefit of unit testing, but I don't feel
> > that you've actually made a case that this workflow is error prone.
> > You often have multiple developers working on the same parts of the
> > same module?
>
> Protecting your head is the exact benefit of bike helmets, that
> doesn't mean you should bike more more recklessly just because you're
> wearing a helmet. :)
>
> Doing text merges is more error prone than not doing them. :)
>
> There are myriad other benefits of breaking up large files into
> functional units. Integration history, refactoring, reuse, as I
> mentioned. Better clarity of design. Easier communication and
> coordination within a team. What's the down side? What's the advantage
> of big files with many functional units?
>


I never advocated big files with many functional units - just files
that are "just big enough". You'll know you've broken them down small
enough when you stop having to do text merges every time you commit.

> > If you don't do this, you aren't really testing your changes, you're
> > testing your reload() machinery.
>
> Only because reload() is hard in Python! ;)
>
> > You seem to have a lot of views about
> > what the "Python way" should be and those are at odds with the actual
> > way people work with Python. I'm not (necessarily) saying you're
> > wrong, but you seem to be coming at this from a confrontational
> > standpoint.
>
> When I refer to "Pythonic" all I'm talking about is what I've read
> here and observed in other people's code. I'm here looking for more
> information about how other people work, to see if there are good
> solutions to the problems I see.
>
> However when I talk about what I think is "wrong" with the Pythonic
> way, obviously that's just my opinion formed by my own experience.
>
> > Your claim, for example, that the language shouldn't place constraints
> > on how you manage your modules is questionable. I think it's more
> > likely that you've developed a workflow based around the constraints
> > (and abilities) of other languages and you're now expecting Python to
> > conform to that instead of its own.
>
> I don't think so; I'm observing things that are common to several
> projects in several languages.
>

.... languages with similar runtime semantics and perhaps common
ancestry? All languages  place limitations on how you handle modules,
either because they have infrastructure you need to use or because
they lack it and you're left on your own.

> > I wonder if you've ever asked yourself why this is the case. I know
> > from my own experience why it's done in traditional C++/C environments
> > - it's because compiling is slow and breaking things into as many
> > files (with as few interdependencies) as possible speeds up the
> > compilation process.
>
> I don't think that's actually true. Fewer, bigger compilation units
> actually compile faster in C, at least in my experience.
>

If you're doing whole project compilation. When you're working,
though, you want to be able to do incremental compilation (all modern
compilers I know of support this) so you just recompile the files
you've changed (and dependencies) and relink. Support for this is why
we have stuff like precompiled headers, shadow headers like Qt uses,
and why C++ project management advocates single class-per-file
structures. Fewer dependencies between compilation units means a
faster rebuild-test turnaround.

> > Absent this need (which doesn't exist in Python),
>
> Python still takes time to load & "precompile". That time is becoming
> significant for me even in a modest sized project; I imagine it would
> be pretty awful in a multimillion line project.
>
> No matter how fast it is, I'd rather reload one module than exit my
> interpreter and reload the entire world.
>

Sure, but whats your goal here? If you're just testing something as
you work, then this works fine. If you're testing large changes, that
affect many modules, then you *need* to reload your world, because you
want to make sure that what you're testing is clean. I think this
might be related to your desire to have everything in lots of little
files. The more modules you load, the harder it is to track your
dependencies and make sure that the reload is correct.

> This is not a problem for Python as scripting language. This is a real
> problem for Python as world class application development language.
>

Considering that no other "world class application development
language" supports reload even as well as Python does, I'm not sure I
can agree here. A perfect reload might be a nice thing to have, but
lack of it hardly tosses Python (or any language) out of the running.

> > In a package __init__, which exists expressly
> > for the purpose of exposing it's interior namespaces as a single flat
> > one, it makes perfect sense.
>
> OK! That's good info, thanks.
>
> > Nobody I know uses reload() for anything more than trivial "as
> > you work" testing in the interpreter. It's not reliable or recommended
> > for anything other than that.
>
> That too... although I think that's unfortunate. If reload() were
> reliable, would you use it? Do you think it's inherently unreliable,
> that is, it couldn't be fixed without fundamentally breaking the
> Python language core?
>

The semantics of exactly what reload should do are tricky. Pythons
reload works in a sensible but limited way. More complicated reloads
are generally considered more trouble than they are worth. I've wanted
different things from reload() at different times, so I'm not even
sure what I would consider it being "reliable".

Here's a trivial example - if you rename a class in a module and then
reload it, what should happen to instances of the class you renamed?

> > This is
> > still a much faster way than compiling any but the most trivial of
> > C/C++ modules.
>
> I'm with you there! I love Python and I'd never go back to C/C++. That
> doesn't change my opinion that Python's import mechanism is an
> impediment to developing large projects in the language.
>
> > If you don't like working with explicit namespaces, you've probably
> > chosen the wrong language.
>
> I never said that. I like foo.Bar(), I just don't like typing
> foo.Foo() and bar.Bar(), which is a waste of space; syntax without
> semantics.
>

There's nothing that prevents there being a bar.Foo, the namespace
makes it clear where you're getting the object. This is again a
consequence of treating modules like classes. Some modules only expose
a single class (StringIO/cStringIO in the standardlib is a good
example), but it's more common for them to expose a single set of
"functionality".

That said, nothing prevents you from using "from foo import Foo" if
Foo is all you need (or need most - you can combine this with import
foo).

> > I propose that the technique most amenable to source code management
> > is for a single file (or RCS level module, if you have a locking RCS)
> > to have everything that it makes sense to edit or change for a
> > specific feature.
>
> Oh, I agree completely. I think we're using the exact same criterion.
> A class is a self-contained feature with a well defined interface,
> just what you'd want to put in it's own file. (Obviously there are
> trivial classes which don't implement features, and they don't need
> their own files.)
>

Sure, if all your classes are that. But very few classes exist in
isolation - there's external and internal dependencies, and some
classes are tightly bound. There's no reason for these tightly bound
classes to be in external files (or an external namespace), because
when you work on one you'll need to work on them all.

> > You're also placing far too much emphasis on reload. Focus yourself on
> > unit tests and environment scripts instead. These are more reliable
> > and easier to validate than reload() in a shell.
>
> I think this is the crux of my frustration. I think reload() is
> unreliable and hard to validate because Python's package management is
> broken. I appreciate your suggestion of alternatives and I think I
> need to come to terms with the fact that reload() is just broken. That
> doesn't mean it has to be that way or that Python is blameless in this
> problem.
>

I wonder what environments you worked in before that actually had a
reliable and gotcha free version of reload? I actually don't know of
any - Smalltalk is closest. It's not really "broken" when you
understand what it does. There's just an expectation that it does
something else, and when it doesn't meet that expectation it's assumed
to be broken. Now, thats a fair definition of "broken", but replacing
running instances in a live image is a very hard problem to solve
generally. Limiting reload() to straightforward, reliable behavior is
a reasonable design decision.


From massimo.scamarcia at gmail.com  Wed Mar 14 15:33:59 2007
From: massimo.scamarcia at gmail.com (skam)
Date: 14 Mar 2007 12:33:59 -0700
Subject: Starting an external, independent process from a script
In-Reply-To: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
References: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
Message-ID: <1173900839.766343.88980@y66g2000hsf.googlegroups.com>

I use ffmpeg instead of mencoder, calling it using os.popen(). You can
also use the "commands" module, but I prefer the first one.

Bye,
Massimo



From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 16:51:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 22:51:39 +0100
Subject: Newbie question
In-Reply-To: <1173117307.283564.22270@30g2000cwc.googlegroups.com>
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<eshihi$1vq7$1@ulysses.news.tiscali.de>
	<1173117307.283564.22270@30g2000cwc.googlegroups.com>
Message-ID: <45ec88f0$0$2349$426a74cc@news.free.fr>

Joshua.R.English at gmail.com a ?crit :
> On Mar 5, 9:03 am, Stargaming <stargam... at gmail.com> wrote:
> 
>>Tommy Grav schrieb:
> 
> 
>>For this case, there are list comprehensions (or map, but you shouldn't
>>use it any longer):
> 
> 
> 
> I didn't see anything in the docs about this.  Is map going away or is
> it considered un-Pythonic now?

It's less used since we have list comps.


From israphelr at googlemail.com  Fri Mar  9 19:56:56 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 9 Mar 2007 16:56:56 -0800
Subject: Need help with a string plz! (newbie)
In-Reply-To: <2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<12v3ksihos7uj7a@corp.supernews.com>
	<1173477047.467568.298090@p10g2000cwp.googlegroups.com>
	<2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>
Message-ID: <1173488215.913014.130190@h3g2000cwc.googlegroups.com>

On 9 Mar, 21:58, Larry Bates <lba... at websafe.com> wrote:
> israph... at googlemail.com wrote:
> > On Mar 9, 9:37 pm, Grant Edwards <gra... at visi.com> wrote:
> >> On 2007-03-09, israph... at googlemail.com <israph... at googlemail.com> wrote:
>
> >>> I thought maybe I could create another variable and then assign each
> >>> character into the new string by concatenating, makign a new string
> >>> each time, but I find this a bit muddling at the moment. Any help'd be
> >>> great. Thanks.
> >> s = ''
> >> for c in word:
> >>     s = c + s
> >> print s
>
> > Okay thanks very much, I used this method, since it's cloest one to I
> > am already faimilar with.
>
> > Here's the final code..(if anyones interested)
>
> > ######################################################
>
> > print "\nWelcome !"
> > print "\nEnter a word, and the world will be reversed!"
>
> > word = raw_input("\nPlease Enter a word: ")
>
> > end = len(word)
> > end -= 1
> > new_string = ""
>
> > for position in range(end, -1, -1):
> >    new_string += word[position]
>
> > print new_string
>
> > raw_input("\nPress Enter to Exit")
>
> > #######################################
>
> If you are really trying to learn Python, you really owe it to
> yourself to study Grant's replies.  You are using constructs
> from some previous language that you learned and trying to
> apply them to Python.  IMHO Python programmers would never use
> s=c+s on strings as it is quite inefficient.  The methods
> and functions he uses reversed(), .join(), list() are very
> powerful Python constructs that you will need to learn how
> to use.  The slicing word[-1::-1] is also something that
> will come in handy later if you learn how to use it.  This
> is a simple example that you can learn a lot from if you
> will study Grant's responses.
>
> Just my two cents.
>
> -Larry

Oh, thanks for the advice then. And as for Grant..look forward to
seeing more of your posts.



From facundo at taniquetil.com.ar  Wed Mar 28 13:51:28 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 28 Mar 2007 17:51:28 +0000 (UTC)
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
Message-ID: <eue9uv$glk$1@sea.gmane.org>

hg wrote:


> I'v been facing some very strange errors lately:
>
> one example:

You'll need to paste here the exact code and the traceback.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From bj_666 at gmx.net  Thu Mar 15 11:21:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 15 Mar 2007 16:21:39 +0100
Subject: Pickle Problem
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
Message-ID: <pan.2007.03.15.15.21.37.391382@gmx.net>

In <1173971633.305988.207530 at d57g2000hsg.googlegroups.com>, tonyr1988
wrote:

> if __name__=='__main__':
> 	x = DemoClass
> 	x.WriteToFile

In Python classes, functions and methods are first class objects.  You
bind the `DemoClass` class object to the name `x`, you are *not* creating
an instance of `DemoClass`.

Then you access the attribute `WriteToFile` of the `DemoClass` class
object.  But you don't do anything with it.

In [39]: class DemoClass(object): pass
   ....:

In [40]: x = DemoClass

In [41]: x
Out[41]: <class '__main__.DemoClass'>

In [42]: y = DemoClass()

In [43]: y
Out[43]: <__main__.DemoClass object at 0xb5a3fd4c>

In [44]: x()
Out[44]: <__main__.DemoClass object at 0xb5a3fc2c>

You have to call the class object and the method to see any effects.

Ciao,
	Marc 'BlackJack' Rintsch


From irmen.NOSPAM at xs4all.nl  Sat Mar 10 16:23:49 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sat, 10 Mar 2007 22:23:49 +0100
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
Message-ID: <45f32218$0$69886$e4fe514c@news.xs4all.nl>

Frank wrote:
> Hi,
> 
> does anyone know how one can test if, e.g., a dictionary 'name' has a
> key called 'name_key'?

name_key in name

e.g.

 >>> name={"john": 42}
 >>> "john" in name
True
 >>> "julie" in name
False

--Irmen


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Mar 16 09:30:45 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 16 Mar 2007 14:30:45 +0100
Subject: Mastering Python
In-Reply-To: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
Message-ID: <45fa9bd4$0$24655$426a74cc@news.free.fr>

Gerald a ?crit :
> Hi ,Im a BSc4 Maths/Computer Science student.Unfortunately my
> curriculum did not include Python programming yet I see many vacancies
> for Python developers.I studied programming Pascal,C++ and Delphi.So I
> need to catch up quickly and master Python programming.How do you
> suggest that I achieve this goal?Is python platform independent?What
> is the best way?And how long would it take before I can develop
> applications using python?Can you recommend websites that feature a
> gentle introduction to Python?

Most of your questions are answered on python.org. May I suggest that 
you start there ?

Briefly:
  * "mastering" a language takes years, whatever the language.
  * the first step is of course learning the language !-)
  * given your background, I'd suggest first the official Python 
tutorial, then diveintopython. Reading this ng might help too.
  * Yes, Python is (mostly) platform-independent - at least as long a 
you don't use platform-dependent modules
  * An average programmer may become productive with Python in a matter 
of days - but really taking advantage of Python's power is another story.


If you like programming, chances are you'll enjoy Python. So welcome on 
board !-)

HTH




From laurent.pointal at limsi.fr  Thu Mar 22 04:13:30 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 22 Mar 2007 09:13:30 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <q8oMh.15082$tD2.5571@newsread1.news.pas.earthlink.net>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174488447.404840.112960@n76g2000hsh.googlegroups.com>
	<1174488908.420851.303850@y66g2000hsf.googlegroups.com>
	<pan.2007.03.21.16.27.37.523923@REMOVE.THIS.cybersource.com.au>
	<q8oMh.15082$tD2.5571@newsread1.news.pas.earthlink.net>
Message-ID: <ettdqs$bj2$1@news2.u-psud.fr>

Dennis Lee Bieber a ?crit :
> On Thu, 22 Mar 2007 03:27:37 +1100, Steven D'Aprano
> <steve at REMOVE.THIS.cybersource.com.au> declaimed the following in
> comp.lang.python:
> 
>> So what should "a b c d" be? 
>>
>> (a, b, c, d)
>> a(b, c, d)
>> a(b, (c, d))
>> a(b(c, d))
>> a(b(c(d)))
>>
>> Have I missed anything? Which is the "right" way? Who can tell?
>>
> 	a(b)(c)(d)
> or, explicit,
> 	((a(b))(c))(d)
> 
> <G>

(Yeah ((Lisp) (is back)))


From dashawn at gmail.com  Sun Mar 25 06:57:26 2007
From: dashawn at gmail.com (dashawn888)
Date: 25 Mar 2007 03:57:26 -0700
Subject: Beginner GTK question
Message-ID: <1174820246.350058.96280@y66g2000hsf.googlegroups.com>

I have a simple page that I want to display a menu and toolbar.  I
have followed the tutorials and have made some customizations to the
basic code snippet found at

http://www.pygtk.org/pygtk2tutorial/examples/uimanager.py

However my customized code does not display the menu bar.  It displays
the toolbar though.  The terminal output is

--------------------------------------------------------------------------------
gui.py:79: GtkWarning: Quit: missing action
  menubar = uimanager.get_widget('/MenuBar')
--------------------------------------------------------------------------------

Line 79 is this

menubar = uimanager.get_widget('/MenuBar')

Thank you for any help in advanced.

Here is the code

--------------------------------------------------------------------------------

#!/usr/bin/env python
#
#
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

import pygtk
pygtk.require('2.0')
import gtk

class d3_gui:
	ui = '''<ui>
		<menubar name="MenuBar">
			<menu action="File">
				<menuitem name="Quit"/>
			</menu>
		</menubar>
		<toolbar name="ToolBar">
			<toolitem action="Quit"/>
		</toolbar>
	</ui>'''

	def __init__(self):
		# Setup the window
		window = gtk.Window()

		# Kill the program if it's closed
		window.connect("destroy", lambda w: gtk.main_quit())

		# Set title and window size
		window.set_title("d3vscan")
		window.set_size_request(640, 480)

		# setup the widget container
		vbox = gtk.VBox()
		window.add(vbox)

		# Setup uimanager for menu and toolbar
		uimanager = gtk.UIManager()

		# Add accelerator group
		accelgroup = uimanager.get_accel_group()
		window.add_accel_group(accelgroup)

		# Create an ActionGroup
		actiongroup = gtk.ActionGroup('d3_gui')
		self.actiongroup = actiongroup

		# Create actions
		actiongroup.add_actions(
			[
				('Quit', gtk.STOCK_QUIT, '_Quit me!', None,
				'Quit the Program', self.quit_d3),
				('File', None, '_File')
			]
		)

		actiongroup.get_action('Quit').set_property('short-label',
'_Quit')

		# Attach the action group
		uimanager.insert_action_group(actiongroup, 0)

		# Add a UI description
		uimanager.add_ui_from_string(self.ui)

		# make menu
		menubar = uimanager.get_widget('/MenuBar')
		vbox.pack_start(menubar, False)

		# Create toolbar
		toolbar = uimanager.get_widget('/ToolBar')
		vbox.pack_start(toolbar, False)

		window.show_all()
		return

	def quit_d3(self, b):
		print 'Quitting program'
		gtk.main_quit()

def main():
	gtk.main()
	return 0

if __name__ == "__main__":
	d3 = d3_gui()
	gtk.main()



From bbxx789_05ss at yahoo.com  Thu Mar 22 23:53:29 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 22 Mar 2007 20:53:29 -0700
Subject: Printing from a text file quirk
In-Reply-To: <1174620861.374740.203670@l75g2000hse.googlegroups.com>
References: <1174620861.374740.203670@l75g2000hse.googlegroups.com>
Message-ID: <1174622009.182242.64160@n59g2000hsh.googlegroups.com>

On Mar 22, 9:34 pm, AWasile... at gmail.com wrote:
> self.headertxt = open("pages/header.html","r")
>
> *** Irrelevant code omitted ***
>
> headerp1 = ""
> for i in range(5):
>         headerp1 += self.headertxt.readline()
> headerp2 = self.headertxt.readline(7)
> headerp3 = self.headertxt.readline()
> headerp4 = self.headertxt.read()
> return headerp1 + headerp2 + headerp3 + pagetitle + headerp4
>
> Here is the textfile im reading:
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
>         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> <html xmlns="http://www.w3.org/1999/xhtml">
>
> <head>
> <title></title>
> <meta name="Generator" content="EditPlus" />
> <meta name="Author" content="Adam W." />
> <meta name="Description" content="Blah Blah Blah" />
> </head>"""
>
> and here is the output:
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
>         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> <html xmlns="http://www.w3.org/1999/xhtml">
>
> <head>
> <title>
> this is a new title
> </title>
> <meta name="Generator" content="EditPlus" />
> <meta name="Author" content="Adam W." />
> <meta name="Description" content="Blah Blah Blah" />
> </head>"""
>
> As you can see what I was trying to acheive was <title>the title</
> title> all on the same line.  Help!

Where can I see that?  From the python language documentation here:

http://docs.python.org/lib/lib.html

you can look up readline() and see:
----------
readline(	[size])
Read one entire line from the file. A trailing newline character is
kept in the string
---------

There is a function called strip() that will strip off all leading and
trailing whitespace on a string, e.g. a newline.



From adrian.villanustre at gmail.com  Fri Mar 30 12:04:13 2007
From: adrian.villanustre at gmail.com (adrian.villanustre at gmail.com)
Date: 30 Mar 2007 09:04:13 -0700
Subject: Islam, the Religion of Ease
In-Reply-To: <1175178981.676137.156340@n59g2000hsh.googlegroups.com>
References: <1175178981.676137.156340@n59g2000hsh.googlegroups.com>
Message-ID: <1175270653.284511.3820@l77g2000hsb.googlegroups.com>

On Mar 29, 11:36 am, "moslim" <lovelyd... at hotmail.com> wrote:
> Excuse me!!
> Would you stop for a moment?!
> O...man...Haven't you thought-one day- about yourself ?
> Who has made it?
> Have you seen a design which hasn't a designer ?!
> Have you seen a wonderful,delicate work without a worker ?!
> It's you and the whole universe!..
> Who has made them all ?!!
> You know who ?.. It's "ALLAH",prise be to him.
> Just think for a moment.
> How are you going to be after death ?!
> Can you believe that this exact system of the universe and all of
> these great creation will end in in nothing...just after death!
> Have you thought, for a second, How to save your soul from Allah's
> punishment?!
> Haven't you thought about what is the right religion?!
> Read ... and think deeply before you answer..
> It is religion of Islam.
> It is the religion that Mohammad-peace upon him- the last prophet, had
> been sent by.
> It is the religion that the right Bible- which is not distorted-has
> preached.
> Just have a look at The Bible of (Bernaba).
> Don't be emstional.
> Be rational and judge..
> Just look..listen...compare..and then judge and say your word.
> We advise you visiting :http://www.islam-guide.comhttp://www.thetruereligion.orghttp://www.beconvinced.comhttp://www.plaintruth.orghttp://english.islamway.comhttp://www.todayislam.comhttp://www.prophetmuhammed.orghttp://www.islamtoday.net/english/http://www.islamunveiled.orghttp://www.islamic-knowledge.com
>
> We willingly recive any inquries at the e-mail :
>
> musl... at hotmail.com

Respectofully:

1.- Use the right place for your propaganda.
2.- Stop with religions, and militarism !!!!
3.- Free the World of religious and Militars and you will get the
Peace for everybody  !!!!
4.- Use your time for usefull matters

Regards

Adrian



From steve at holdenweb.com  Thu Mar 15 11:09:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 15 Mar 2007 11:09:13 -0400
Subject: Multiline code - trailing slash usage
In-Reply-To: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
Message-ID: <etbnlf$gab$1@sea.gmane.org>

abcd wrote:
> When do I need to use a trailing slash to separate code over multiple
> lines.
> 
> For example:
> 
> x = "hello world, this is my multiline " + \
>      "string!!!!"
> 
> x = {'name' : \
>       'bob'}
> 
> Do I need to use the "\" in the above examples?  When do i need to use
> it?
> 
It's only needed if the end of the line could also be the end of the 
statement. So if there's an unclosed parenthesis, bracket or brace you 
can move to the next line without using a continuation backslash.

So it's needed in the first example, but not in the second.

Note also, by the way, that the Python interpreter will concatenate two 
adjacent string literals, so you could also have written

x = "hello world, this is my multiline " \
      "string!!!!"

and this would have saved you a run-time string concatenation :)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From skip at pobox.com  Wed Mar 14 08:59:57 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 14 Mar 2007 07:59:57 -0500
Subject: execfile locks file forever if there are any syntax errors - is it
	python bug?
In-Reply-To: <20070314130014.A4F9.SLAWOMIR.NOWACZYK.847@student.lu.se>
References: <20070314130014.A4F9.SLAWOMIR.NOWACZYK.847@student.lu.se>
Message-ID: <17911.61901.32043.373777@montanaro.dyndns.org>


    Slawomir> When I execfile a file which contains a syntax error, the file
    Slawomir> becomes locked and stays this way all the way until I exit the
    Slawomir> interpreter (I am unable to delete it, for example). I have
    Slawomir> tried but failed to find any way to unlock the file... Is this
    Slawomir> a bug in Python?

Kinda seems like it might be.  Please file a bug report on SourceForge.

Skip


From mccredie at gmail.com  Wed Mar  7 19:45:33 2007
From: mccredie at gmail.com (Matimus)
Date: 7 Mar 2007 16:45:33 -0800
Subject: Flatten a two-level list --> one liner?
In-Reply-To: <mailman.4778.1173312889.32031.python-list@python.org>
References: <mailman.4778.1173312889.32031.python-list@python.org>
Message-ID: <1173314733.624957.247130@p10g2000cwp.googlegroups.com>

> Any ideas?

how about list comprehension (should actually work even if there is an
empty sub-list):
>>> spam = [[1,2,3],[4,5,6],[7,8,9],[10,11,12]]
>>> [parrot for egg in spam for parrot in egg]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

-m



From steve at holdenweb.com  Tue Mar 20 02:21:26 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 20 Mar 2007 02:21:26 -0400
Subject: any ways to judge whether an object is initilized or not in 
	a class
In-Reply-To: <pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>	<566vcfF27jlu4U1@mid.uni-berlin.de>	<1174293300.034362.282460@l75g2000hse.googlegroups.com>	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
Message-ID: <etnuk6$pgt$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Mon, 19 Mar 2007 19:48:37 +1100, Ben Finney wrote:
> 
>> It's also best to inherit every class from another class, leading to a
>> single hierarchy for all classes and types. 'object' is the one to
>> choose if you don't want the behaviour of any other class.
> 
> What's wrong with old-style classes?
> 
> On the plus side:
> 
> - Why inherit from something if you don't need to?
> 
> - Less typing.
> 
> - Attribute-lookup is much faster, perhaps as much as twice as fast.
> http://www.python.org/~jeremy/weblog/030506.html
> 
> - Documentation on old style classes is more extensive.
> 
> - You can't use new style classes for exceptions.
> 
In 2.5 exceptions are new-style objects, thanks to Brett Cannon's PyCon 
work from 2006:

Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
Started with C:/Steve/.pythonrc
  >>> Exception
<class exceptions.Exception at 0x00964510>
  >>>


Python 2.5b2 (trunk:50713, Jul 19 2006, 16:04:09)
[GCC 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
Started with C:/Steve/.pythonrc
  >>> Exception
<type 'exceptions.Exception'>
  >>>

> 
> 
> On the minus side:
> 
> - Properties don't work as you expect them too.
> 
> - Slots don't work at all.
> 
> 
> In other words, the only reason why you HAVE to use a new style class is
> that you need properties or __slots__. You might WANT to use a new style
> class to inherit from built-in types. Otherwise, the choice between old
> and new is not very important.
> 
> 
> 
Most of the documentation on old-style classes, of course, applies to 
new-style classes too.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From mail at timgolden.me.uk  Thu Mar 15 16:18:19 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 15 Mar 2007 20:18:19 +0000
Subject: Importing WMI in a child Thread throws an error
In-Reply-To: <1173988785.412251.126370@l77g2000hsb.googlegroups.com>
References: <1172602368.563302.160060@t69g2000cwt.googlegroups.com>	<mailman.4472.1172611846.32031.python-list@python.org>	<1172692796.192098.300590@h3g2000cwc.googlegroups.com>	<mailman.4526.1172693311.32031.python-list@python.org>
	<1173988785.412251.126370@l77g2000hsb.googlegroups.com>
Message-ID: <45F9AA0B.6070809@timgolden.me.uk>

>> If you want to post some specific code examples, I'm
>> happy to talk you through possible optimisations.
>>
>> TJG
> 
> Sorry I didn't reply right away. Here's the straight WMI code I'm
> using:
> 
> c = wmi.WMI()
>     for i in c.Win32_ComputerSystem():
>         mem = int(i.TotalPhysicalMemory)
>         compname = i.Name
> for i in c.Win32_Processor ():
>         cputype = i.Name

Well, don't know how much gain you'll get, but yo
could try the following quickies:

<code>
import wmi
c = wmi.WMI (find_classes=False)

for i in c.Win32_ComputerSystem (
   ['TotalPhysicalMemory', 'Name']
):
   mem = int (i.TotalPhysicalMemory)
   compnam = i.Name

for i in c.Win32_Processor (['Name']):
   cputype = i.Name

</code>

If you were going to repeat these often (say, in
a loop, which doesn't seem likely given you
examples) you might gain a few nanosecs by
pulling the attribute lookup outside the loop:

<code>
import wmi
c = wmi.WMI (find_classes=False)

ComputerSystem = c.Win32_ComputerSystem
Processor = c.Win32_Processor

while True:
   for computer_system in ComputerSystem (...): ...
   for processor in Processor (...): ...

</code>

But, as everyone else on this list will tell you,
there's no point in optimising unless you know you
need to to, and unless you know where :-) That's
what modules like timeit profiler are for.

TJG


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 22:52:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 00:52:16 -0300
Subject: Unexpected behavior of list of list
References: <1173490209.398081.200420@h3g2000cwc.googlegroups.com>
	<pan.2007.03.10.02.58.58.686313@REMOVE.THIS.cybersource.com.au>
Message-ID: <op.toyfpe1dx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 23:58:59 -0300, Steven D'Aprano  
<steve at REMOVE.THIS.cybersource.com.au> escribi?:

> You know, now that Python has a warnings module, it would be really good
> if list-of-lists*int raised a warning. Does anyone know if that's  
> feasible
> or possible? It needn't catch every imaginable Gotcha, just the common
> case. I'm thinking something like this:
>
> # pseudo-code
> class list:
>     def __mul__(self, count):
>         for item in self:
>             if isinstance(item, list):
>                 warn("this duplicates references, not copies")
>                 break
>         ...do the rest

But isn't the same with almost any other object (except inmutable ones)?
[{}]*5, [set()]*5, even [my_instance]*5?
It's hard to tell when it's a legitimate use and when it's a mistake, and  
the checking+warning call has a cost...

-- 
Gabriel Genellina



From jantod at gmail.com  Sun Mar 11 06:32:04 2007
From: jantod at gmail.com (Janto Dreijer)
Date: 11 Mar 2007 03:32:04 -0700
Subject: threading and iterator crashing interpreter
Message-ID: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>

I have been having problems with the Python 2.4 and 2.5 interpreters
on both Linux and Windows crashing on me. Unfortunately it's rather
complex code and difficult to pin down the source.

So I've been trying to reduce the code. In the process it's started to
crash in different ways. I'm not sure if any of it is related. The
following is only crashing Python 2.5 (r25:51908, Sep 19 2006,
09:52:17) [MSC v.1310 32 bit (Intel)] on win32 in two different(?)
ways.

====================

Using the login1() function will throw a bunch of exceptions the most
interesting of which is:

Exception in thread Thread-34:
Traceback (most recent call last):
  File "C:\Python25\lib\threading.py", line 460, in __bootstrap
    self.run()
  File "C:\Python25\lib\threading.py", line 440, in run
    self.__target(*self.__args, **self.__kwargs)
  File "Copy of scratchpad.py", line 20, in login1
    random.choice(System.sessions).session_iter.next()
RuntimeError: instance.__dict__ not accessible in restricted mode

I'm not concerned with the Python exceptions, but about 40% of the
time it will launch the Visual Studio JIT Debugger with an "Unhandled
exception at 0x1e03973e in pythonw.exe: 0xC0000005: Access violation
reading location 0x00002024."

=================

Using the login2() function will sometimes (about 30% of the time)
cause the following to be printed out:
"""
Unhandled exception in thread started by
Error in sys.excepthook:

Original exception was:
"""

===============

Here's the code. Will it be easier to find the problem if I tried
compiling Python myself?

from threading import Thread
import random

def session_iter(f):
        # second interpreter
        while 1:
                yield len(f.__dict__)

class Session:
        def __init__(self):
                self.session_iter = session_iter(self)

class System:
        sessions = []

def login1():
        # first interpreter
        System.sessions.append(Session())
        while 1:
                random.choice(System.sessions).session_iter.next()

def login2():
        # first interpreter
        System.sessions.append(Session())
        System.sessions.pop().session_iter.next()

# main interpreter
threads = [Thread(target=login1) for t in range(2000)]
for thread in threads:
        thread.start()



From arkanes at gmail.com  Thu Mar  8 13:16:21 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Thu, 8 Mar 2007 12:16:21 -0600
Subject: merits of Lisp vs Python
In-Reply-To: <RxPHh.10406$tD2.5273@newsread1.news.pas.earthlink.net>
References: <1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<RxPHh.10406$tD2.5273@newsread1.news.pas.earthlink.net>
Message-ID: <4866bea60703081016t40ed9f0bu127c3cb460220a7c@mail.gmail.com>

On 3/8/07, Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> On Thu, 08 Mar 2007 06:13:15 GMT, John Nagle <nagle at animats.com>
> declaimed the following in comp.lang.python:
>
> >
> >     When starting out with this project, I'd made the assumption that
> > Python was a stable, working, well-supported technology, like Perl
> > hosting.  It isn't.
> >
>         It is interesting how your text seems to blame "Python" (the
> language) when comparing not to "Perl" (the language) but to a service
> field of "Perl hosting".
>
>         At the least, be fair and use the phrase "Python hosting" in any
> place you'd have used "Perl hosting"...
>
>
> (I note in passing you did have a comment about Python, the language,
> being good... but anyone reading quickly would tend to interpret, say
> the part quoted above, as "Python is unstable, doesn't work, and
> unsupported" -- none of which, in my experience, is true... Low-cost web
> hosting with Python is a different kettle of fish [chowder, probably
> <G>])
>

Mr. Nagle has a history of phrasing his personal problems as if they
were vast, sweeping, general issues affecting the entire industry. The
original post, and several followups, referred to *real* hosting
provides, with the emphasis, and in the context of "industrial
strength". Any *real* hosting provider is going to support whatever
language and environment I tell them to, because I'm going to pay them
a lot of money for excellent support and if they give me any trouble I
will go with someone who provides what I want.


What was *meant* was low priced, zero maintenance, reasonably reliable
consumer level hosting. Thats a totally different market, it's not
"industrial strength", and it doesn't merit the emphasis on *real*
provider. And it is true that in that realm Python is not well
represented.


From Shawn at Milochik.com  Fri Mar  2 17:44:46 2007
From: Shawn at Milochik.com (Shawn Milo)
Date: Fri, 2 Mar 2007 17:44:46 -0500
Subject: Perl and Python, a practical side-by-side example.
Message-ID: <2dc0c81b0703021444r2b0b7ab8sc24f302d9782e267@mail.gmail.com>

I'm new to Python and fairly experienced in Perl, although that
experience is limited to the things I use daily.

I wrote the same script in both Perl and Python, and the output is
identical. The run speed is similar (very fast) and the line count is
similar.

Now that they're both working, I was looking at the code and wondering
what Perl-specific and Python-specific improvements to the code would
look like, as judged by others more knowledgeable in the individual
languages.

I am not looking for the smallest number of lines, or anything else
that would make the code more difficult to read in six months. Just
any instances where I'm doing something inefficiently or in a "bad"
way.

I'm attaching both the Perl and Python versions, and I'm open to
comments on either. The script reads a file from standard input and
finds the best record for each unique ID (piid). The best is defined
as follows: The newest expiration date (field 5) for the record with
the state (field 1) which matches the desired state (field 6). If
there is no record matching the desired state, then just take the
newest expiration date.

Thanks for taking the time to look at these.

Shawn

##########################################################################
Perl code:
##########################################################################
#! /usr/bin/env perl

use warnings;
use strict;

my $piid;
my $row;
my %input;
my $best;
my $curr;

foreach $row (<>){

	chomp($row);
	$piid = (split(/\t/, $row))[0];

	push ( @{$input{$piid}}, $row );
}

for $piid (keys(%input)){

	$best = "";

	for $curr (@{$input{$piid}}){
		if ($best eq ""){
			$best = $curr;
		}else{
			#If the current record is the correct state

			if ((split(/\t/, $curr))[1] eq (split(/\t/, $curr))[6]){
				#If existing record is the correct state
				if ((split(/\t/, $best))[1] eq (split(/\t/, $curr))[6]){
					if ((split(/\t/, $curr))[5] gt (split(/\t/, $best))[5]){
						$best = $curr;
					}
				}else{
					$best = $curr;
				}
			}else{
				#if the existing record does not have the correct state
				#and the new one has a newer expiration date
				if (((split(/\t/, $best))[1] ne (split(/\t/, $curr))[6]) and
((split(/\t/, $curr))[5] gt (split(/\t/, $best))[5])){
					$best = $curr;
				}
			}
		}


	}
	print "$best\n";
}

##########################################################################
End Perl code
##########################################################################






##########################################################################
Python code
##########################################################################

#! /usr/bin/env python

import sys

input = sys.stdin

recs = {}

for row in input:
	row = row.rstrip('\n')
	piid = row.split('\t')[0]
	if recs.has_key(piid) is False:
		recs[piid] = []
	recs[piid].append(row)

for piid in recs.keys():
	best = ""
	for current in recs[piid]:
		if best == "":
			best = current;
		else:
			#If the current record is the correct state
			if current.split("\t")[1] == current.split("\t")[6]:
				#If the existing record is the correct state
				if best.split("\t")[1] == best.split("\t")[6]:
					#If the new record has a newer exp. date
					if current.split("\t")[5] > best.split("\t")[5]:
						best = current
				else:
					best = current
			else:
				#If the existing  record does not have the correct state
				#and the new record has a newer exp. date
				if best.split("\t")[1] != best.split("\t")[6] and
current.split("\t")[5] > best.split("\t")[5]:
					best = current
			
	print best


##########################################################################
End Python code
##########################################################################


From maksim.kasimov at gmail.com  Fri Mar  2 12:36:16 2007
From: maksim.kasimov at gmail.com (Maksim Kasimov)
Date: Fri, 02 Mar 2007 19:36:16 +0200
Subject: is it bug or feature in xml.dom.minidom?
Message-ID: <es9nah$aoh$1@news.lucky.net>


Hi, i'm faced with such a problem when i use xml.dom.minidom:

to append all child nodes from "doc" in "_requ" to "doc" in "_resp", i do the following:

_requ = minidom.parseString("<resp><doc><one>One</one><two>Two</two></doc></resp>")
_resp = minidom.parseString("<resp><doc/></resp>")


iSourseTag = _requ.getElementsByTagName('doc')[0]
iTargetTag = _resp.getElementsByTagName('doc')[0]


# it prints me that there are two child nodes
for iChild in iSourseTag.childNodes:
	print iChild.toxml()


# when i walk elements, only first iteration was made
# and iSourseTag.childNodes now have only one element instead of two
for iChild in iSourseTag.childNodes:
	iTargetTag.appendChild(iChild)


# it prints me that there is only one child node
for iChild in iSourseTag.childNodes:
	print iChild.toxml()

i'm not sure, whether i append child nodes in properly way, but IMHO it looks like a bug.

My question is how to avoid the "iSourseTag" changes while iterate its nodes?

And, of course, how to append all child nodes to "iTargetTag"?

Thank for any help.

-- 
Maksim Kasimov


From bayer.justin at googlemail.com  Thu Mar  1 12:42:00 2007
From: bayer.justin at googlemail.com (bayer.justin at googlemail.com)
Date: 1 Mar 2007 09:42:00 -0800
Subject: Dialog with a process via subprocess.Popen blocks forever
In-Reply-To: <mailman.4569.1172751469.32031.python-list@python.org>
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
Message-ID: <1172770920.052040.33990@h3g2000cwc.googlegroups.com>

Okay, here is what I want to do:

I have a C Program that I have the source for and want to hook with
python into that. What I want to do is: run the C program as a
subprocess.
The C programm gets its "commands" from its stdin and sends its state
to stdout. Thus I have some kind of dialog over stdin.

So, once I start the C Program from the shell, I immediately get its
output in my terminal. If I start it from a subprocess in python and
use python's sys.stdin/sys.stdout as the subprocess' stdout/stdin I
also get it immediately.

BUT If I use PIPE for both (so I can .write() on the stdin and .read()
from the subprocess' stdout stream (better: file descriptor)) reading
from the subprocess stdout blocks forever. If I write something onto
the subprocess' stdin that causes it to somehow proceed, I can read
from its stdout.

Thus a useful dialogue is not possible.

Regards,
-Justin





From tew24 at spam.ac.uk  Wed Mar 21 09:48:16 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 13:48:16 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5392.1174484383.32031.python-list@python.org>
Message-ID: <etrd30$2rj$2@gemini.csx.cam.ac.uk>

Thinker wrote:
> How do you know amount of memory used by Python?
> ps ? top or something?

$ ps up `pidof python2.5`
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
tew24    26275  0.0 11.9 257592 243988 pts/6   S+   13:10   0:00 python2.5

"VSZ" is "Virtual Memory Size" (ie. total memory used by the application)
"RSS" is "Resident Set Size" (ie. non-swapped physical memory)


-- 
I'm at CAMbridge, not SPAMbridge


From kirby.urner at gmail.com  Sat Mar 10 11:37:18 2007
From: kirby.urner at gmail.com (kirby urner)
Date: Sat, 10 Mar 2007 08:37:18 -0800
Subject: [Edu-sig] minimum age to learn python (a.k.a graphical vs text
	languages)
In-Reply-To: <45F2CFC4.5010801@bryant.edu>
References: <45F2CFC4.5010801@bryant.edu>
Message-ID: <f604188c0703100837r1762e63clda21fd199d3fe1f4@mail.gmail.com>

<< questions about others' experience >>

> Is it no big deal either way?
>
>
>                thanks,
>
>                        Brian Blais

Hi Brian --

Lego Mindstorms is popular in my neck of the woods
(Silicon Forest -- Oregon), starting in middle school.
I helped coach a team a few years ago.  There's a
tournament aspect, with the teams coming together
around challenges.  I frankly don't know if nqc is a
permitted option -- it might be.

On the Python side, I volunteered one day a week
for about 8 weeks (then for a 2nd 8 weeks, with another
group), teaching Python in a Portland public school
to 8th graders.  I didn't feel they were floundering or
having any real trouble keeping up.  I wasn't focusing
on robotics or controlling an avatar or anything i.e.
this experience was not designed to feed the
Mindstorms teams.

Given the Mindstorms groups tend to be after school,
staffed by volunteer parents, the students attracted
to them tend to be self selected on the basis of prior
experience, self confidance around programming or
whatever.

My daughter has a kit since Christmas (she's in 7th
grade) but hasn't joined a team because she's protective
of her time, wants to play and do homework.  Plus it's
really only the Sony Aibo she cares about and I've never
been able to afford one (her dad is not a money god
unfortunately).

I haven't pushed hard to teach her Python either, though
I'm hoping she'll guinea pig (or hedge hog) some of my
curriculum materials down the road (we were discussing
that yesterday -- she could start by watching a few of my
screencasts about Python, high rez versions).

I think a typical scenario might be to join a team or
form one, using the usual equipment, including Robolab,
and then finding, within that group, a couple interested
students who might be wanting to try a Linux/Python option.
If you have other parents, they'd be candidate learners.
If you attract some high schoolers, them too.

I think middle school is sort of on the edge of where
you'd start, and it's important to have a dynamic where
the kids step forward at that level, don't feel pressured.
Some type quite well (given all the instant messaging),
others not, and lack of typing skills *is* a barrier to entry.

Depending on the size of your original pool, you may
well catalyze a few promising careers.

The public school I mentioned is currently moving to a
Scratch -> Alice track, still with the Mindstorms robotics
option on the side, as an after school activity.

I just talked to the computer teacher yesterday and he
was reporting some rumor that future versions of Alice will
center around the same Sims as in Sims, which my daughter
plays with *a lot* (we also bought Civ City Rome yesterday,
coincidentally, and she built Rome in a day).

Arthur, a long time member of this list, had many strong
reservations about Alice, which tended to become moot
after Alice stopped being written in Python.  I think he
would have preferred like my Saturday Academy class,
where I also teach Python, but using a very bare bones
mathematical approach, no thick layer of someone else's
design (just IDLE + VPython mostly these days, plus
I admit to pre writing some py files -- we don't reinvent all
of mathematics, me neither).  I get a few middle schoolers
in these classes, but only a couple, and usually already
about two standard deviations in the college level direction.

Kirby


From jeff at jmcneil.net  Fri Mar  9 11:35:21 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Fri, 9 Mar 2007 11:35:21 -0500
Subject: about application deployment
In-Reply-To: <55dffaF24658vU2@mid.uni-berlin.de>
References: <mailman.4860.1173456688.32031.python-list@python.org>
	<55dffaF24658vU2@mid.uni-berlin.de>
Message-ID: <82d28c40703090835k1683c124ha6a95cfd9f4a656c@mail.gmail.com>

If a .egg file is in your sys.path, it would be nice to simply use 'python
-m' in my opinion. As far as I know, you can't '-m' a module that's been
imported from a zip file?



On 3/9/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>
> Alessandro de Manzano wrote:
>
> > Hello,
> >
> > I'ld ask you all about deployment of python applications.
> >
> > Sometimes (if not most times..) I would make deployment easy (easier)
> > for my customers (and for me too...)
> >
> > What I mean, would be very useful to have a "jar-like" archive/single
> > file / multiple platform in order to deploy also complex applications
> > with many modules.
> >
> > I know about "py2exe", it's nice but it's Windows only, I would need
> > something multiplatform or at least available also for other platforms
> > (*nix, Mac maybe, ...)
> >
> > My impression is that Python is a great language but a bit "messy"
> > about on field deployment...
> >
> > What am I missing ? :)
> > What are your experiences (and solutions ?) for this issues ?
>
> There are the greate setuptools available, that make creating and
> installing
> a single .egg-file (which is very close to a jar) easy as cake - provided
> you've got them working.
>
> I'm not sure if there is some equivalent as
>
> java -jar <jar>
>
> though. Could be worth thinking about.
>
> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From dyp at vtimetec.com  Wed Mar 28 04:26:50 2007
From: dyp at vtimetec.com (dyp at vtimetec.com)
Date: 28 Mar 2007 01:26:50 -0700
Subject: Freeze problem(second time do not imported)
Message-ID: <1175070410.922094.7470@p77g2000hsh.googlegroups.com>

Hi,

I am using DLLs from freez.py  and these dll are running inside a
program(Not OS level). If I have 2 dlls such as A.dll, B.dll,
I can import and run a(A.run()) function in  A.dl,
next I can import and run a function(B.run()) in B.dll
Next if I try to run A.run(), it doesn't work at all.

Anyone knows what is the reason and tips?

Thanks in advance!



From nick at craig-wood.com  Wed Mar 21 15:30:08 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 21 Mar 2007 14:30:08 -0500
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<pan.2007.03.21.16.25.02.135904@REMOVE.THIS.cybersource.com.au>
	<etrper$t8g$1@gemini.csx.cam.ac.uk>
	<pan.2007.03.21.18.01.07.125772@REMOVE.THIS.cybersource.com.au>
Message-ID: <slrnf0306k.1dh.nick@irishsea.home.craig-wood.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>  Or you could just have an "object leak" somewhere. Do you have any
>  complicated circular references that the garbage collector can't resolve?
>  Lists-of-lists? Trees? Anything where objects aren't being freed when you
>  think they are? Are you holding on to references to lists? It's more
>  likely that your code simply isn't freeing lists you think are being freed
>  than it is that Python is holding on to tens of megabytes of random
>  text.

This is surely just the fragmented heap problem.

It is a hard problem returning unused memory to the OS since it
usually comes in page size (4k) chunks and you can only return pages
on the end of your memory (the sbrk() interface).

The glibc allocator uses mmap() for large allocations which *can* be
returned to the OS without any fragmentation worries.

However if you have lots of small allocations then the heap will be
fragmented and you'll never be able to return the memory to the OS.

However that is why we have virtual memory systems.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jzgoda at o2.usun.pl  Thu Mar 22 17:48:26 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Thu, 22 Mar 2007 22:48:26 +0100
Subject: ZSI, SOAP and .NET web services - problem
In-Reply-To: <vrltgjbpuvhd$.dlg@zabiello.com>
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
	<mailman.5472.1174585474.32031.python-list@python.org>
	<vrltgjbpuvhd$.dlg@zabiello.com>
Message-ID: <etutqu$c70$1@nemesis.news.tpi.pl>

Jaroslaw Zabiello napisa?(a):

>> However, it is an interesting question.  Ruby has smaller community, 
>> how could they implement a standard SOAP lib?
> 
> Yes. It is interesting why it is so difficult to make it working for
> Python.

It is not difficult to write in .NET a client for the service
implemented on .NET platform. This is interoperability as understood by
Microsoft. BEA, IBM Oracle and others aren't any better.

If you really must write client for this service, go and do it in Ruby,
if it works.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 19:29:13 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 21:29:13 -0300
Subject: Reading a portion of a file
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
	<1173372768.823896.32710@n33g2000cwc.googlegroups.com>
	<1173375977.853461.68240@v33g2000cwv.googlegroups.com>
	<1173376256.933492.71410@c51g2000cwc.googlegroups.com>
	<1173378944.595861.190980@c51g2000cwc.googlegroups.com>
	<1173407894.702241.58660@30g2000cwc.googlegroups.com>
	<1173450495.712801.18680@v33g2000cwv.googlegroups.com>
Message-ID: <op.tox6azrax6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 11:28:15 -0300, Vulcanius <cmfvulcanius at gmail.com>  
escribi?:

> Here is the code I've come up with. Please feel free to critique it
> and let me know what you would change. Also, as you can see I call
> "open(SERVER,'r')" twice; but I want to only call it once, what would
> the best way to do this be?

You got yesterday a reply from rune.strand at g... without regexps that looks  
pretty functional, have you seen it?

> SECTIONDICT = {}
> for SECT in SECTIONS:
>     PRESECTNAME1 = SECT[9:len(SECT) - 1]
>     PRESECTNAME2 = PRESECTNAME1.split("/")

Ugh... don't use UPPERCASE names for variables, please!
Better to follow this style guide: http://www.python.org/dev/peps/pep-0008/

-- 
Gabriel Genellina



From r0bert_neville310 at yah00.com  Sun Mar 18 17:46:53 2007
From: r0bert_neville310 at yah00.com (Robert Neville)
Date: Sun, 18 Mar 2007 14:46:53 -0700
Subject: Building several parsing modules
Message-ID: <ljcrv25n8d5n778ago8ejdugoej4422lti@4ax.com>

Basically, I want to create a table in html, xml, or xslt; with any
number of regular expressions; a script (Perl or Python) which reads
each table row (regex and replacement); and performs the replacement
on any file name, folder, or text file (e.g. css, php, html).  For
example, I often rename my mp3 (files); the folder holding the mp3
files; and replace these renamed values in a playlist/m3u/xml file. 

The table should hold clean regular expressions with minimal escaping.
The regular expressions would incorporate multiple lines and complex
expressions (e.i. symbolic grouping, back referencing, negative
lookahead). The table would serve as a preset file for any replacement
task. It also contains short description column for each regular
expression. The table could contain 1 to 1000 regular expressions; and
the input file could have 1000 to ten thousand lines as well. SED
would become messy here.

I am just starting out with building the logic and pseudo-code.  I am
hoping for any examples where these libraries have been applied. Links
and guides would help since I am just starting out with the language.
I need suggestions and examples on reading input by line; managing
large data sets; iterating through an xml/html structure; and various
parsing techniques. 

I built a solution in VBScript and VBA, but it had several limitations
like operating on one platform and did not have full Perl regular
expression support. In addition, it is attached to an Access database.
The solution would parse and add headers to the data. It would parse
the data with the headers and insert it into a table. It had over
fifteen modules for repetitive parsing tasks to build a importable
data set. VBScript Regexes are not as powerful as Perl or even sed.

This request is large, yet someone with command of the language could
give guidance on the basic framework to kickstart my efforts.
Basically, I need someone to say start here; then proceed to this
function; then look into these libraries; so on. 


From paul at eventuallyanyway.com  Wed Mar 14 01:59:59 2007
From: paul at eventuallyanyway.com (Paul Hummer)
Date: Wed, 14 Mar 2007 05:59:59 +0000
Subject: help developing an editor to view openoffice files.
In-Reply-To: <f81479dd0703132203m2b5037e5uf6dd22e7abb2a2c5@mail.gmail.com>
References: <mailman.5005.1173770157.32031.python-list@python.org>	<et6g05$4av$1$8300dec7@news.demon.co.uk>
	<et6unr$fd7$1@sea.gmane.org>
	<f81479dd0703132203m2b5037e5uf6dd22e7abb2a2c5@mail.gmail.com>
Message-ID: <45F78F5F.6030602@eventuallyanyway.com>

krishnakant Mane wrote:
> hello,
> well what I exactly need to do is firstly have a way to read .odt and
> .ods files.
> I have a lot of information in open office format which I need to access.
> The most important thing is that I completely want to avoid the use of
> microsoft office.
> so I need to firstly get access to open office documents through a
> python module that can read and parse those documents and may be
> convert it to html and display in some kind of an html/ text area may
> be wxpython can help?
> secondly I want to edit those documents may be in html format and then
> when I say sayve it should save the changes back to .odt with the
> formatting information.
> can this be made possible?
> thanks and regards,
> Krishnakant.
>   
I actually just read this in the O'Reilly book "Python Cookbook," so I
know this answer off the top of my head.  OpenOffice files are merely
zip files with well documented XML inside.  Use the builtin zip module
to open them, and then it's just XML parsing.  As far as the editor,
you'll have to familiarize yourself with the XML data from the
documentation, and it sounds like that's quite a project.

Just out of curiosity, why not just download OpenOffice?

Paul
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From DustanGroups at gmail.com  Thu Mar 22 18:48:45 2007
From: DustanGroups at gmail.com (Dustan)
Date: 22 Mar 2007 15:48:45 -0700
Subject: Question regarding __new__
In-Reply-To: <mailman.5467.1174580705.32031.python-list@python.org>
References: <mailman.5467.1174580705.32031.python-list@python.org>
Message-ID: <1174603725.785079.147410@e1g2000hsg.googlegroups.com>

On Mar 22, 10:19 am, Frank Benkstein <frank-pyt... at benkstein.net>
wrote:
> Hi,
>
> the behaviour I always observed when creating instances by calling the
> class A is that '__init__' is always only called when the object
> returned by A.__new__ is an instance of A. This can be observed by the
> following code:
>
> class A(object):
>     def __new__(cls, *args, **kwds):
>         print "A.__new__", args, kwds
>         return object.__new__(B, *args, **kwds)
>     def __init__(cls, *args, **kwds):
>         print "A.__init__", args, kwds
>
> class B(object):
>     def __new__(cls, *args, **kwds):
>         print "B.__new__", args, kwds
>         return object.__new__(cls, *args, **kwds)
>     def __init__(cls, *args, **kwds):
>         print "B.__init__", args, kwds
>
> Interactively A() then gives:
>
> >>> A()
>
> A.__new__ () {}
> <__main__.B object at 0xb7bed0ec>
>
> Yet [1] says: "[...] some rules for __new__: [...] If you return an
> object of a different class, its __init__ method will be called."
>
> Am I missing something? Is this documented somewhere else?

http://docs.python.org/ref/customization.html

> Also it
> would be nice if someone could point me to the function that implements
> this in C. I didn't find anything in object.c or typeobject.c.
>
> Best regards
> Frank Benkstein.
>
> [1]http://www.python.org/download/releases/2.2/descrintro/#__new__
>
> --
> GPG (Mail): 7093 7A43 CC40 463A 5564  599B 88F6 D625 BE63 866F
> GPG (XMPP): 2243 DBBA F234 7C5A 6D71  3983 9F28 4D03 7110 6D51
>
>  signature.asc
> 1KDownload




From steve at REMOVEME.cybersource.com.au  Wed Mar 14 03:02:33 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 14 Mar 2007 18:02:33 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
	<1173843736.982126.211530@l77g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.14.07.02.32.652175@REMOVEME.cybersource.com.au>

On Tue, 13 Mar 2007 20:42:17 -0700, tleeuwenburg at gmail.com wrote:

> It should be possible to enumerate all sets of five numbers which sum
> to 50 and randomly select one of them.

Of course it's possible. It's also a very inefficient way of doing so. For
five numbers between 1 and 50, there are 50**5 = 312,500,000 possible sets
to enumerate. Do you really think it is a good idea to generate over three
hundred and twelve million lists, just to return one?

The sole advantage of this method is that it will give "the most random"
result, with the least amount of bias possible. But it isn't clear that
the much more efficient fence-post method is any less random.

See also the Subset Sum Problem:
http://en.wikipedia.org/wiki/Subset_sum_problem



-- 
Steven D'Aprano 



From likwoka at gmail.com  Mon Mar  5 17:16:14 2007
From: likwoka at gmail.com (Alex Li)
Date: 5 Mar 2007 14:16:14 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
Message-ID: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>

Hello,

I would like to use Python 2.5 on Windows with Graphviz to generate
graphs.  I used yapgvb but it only requires Python 2.4 (won't work
with Python 2.5).  Other packages like pydot seems to be unmaintained
or requires custom building to be used on Windows (pygraphviz), which
I tried to avoid.  Any suggestions?

Thanks in advance,
Alex



From jjl at pobox.com  Fri Mar 30 19:58:27 2007
From: jjl at pobox.com (John J. Lee)
Date: Fri, 30 Mar 2007 23:58:27 GMT
Subject: Question about using cookielib in python 2.4
References: <1175200961.268046.194410@l77g2000hsb.googlegroups.com>
Message-ID: <87r6r6i8rg.fsf@pobox.com>

Marko.Cain.23 at gmail.com writes:

> Hi,
> I am following the example of Python cookbook (14.7) about using
> cookielib in python2.4
> 
>  cj = cookielib.LWPCookieJar()
> //.... code to send out the request
>     print "Coookie-------------------------"
>             if cj is not None:
>                 for index, cookie in enumerate(cj):
>                     print index, ': ' , cookie
>                 cj.save(COOKIEFILE)
> 
> My question is I see cookie being printed in the above code,
> but when I do a 'more ' of the Cookie file, it is empty?
> 
> This is what I see on the screen:
> 
> Coookie-------------------------
> 0 :  <Cookie Test-ID=swmfp2caw065kswg for .vision5.abc.com/>
> 
> but when I more the 'cookie file', it is empty?
> 
> $ more cookies.lwp
> #LWP-Cookies-2.0
> $

I think I can guess, but post the code and I'll tell you for sure (if
it's the same as V1 of the cookbook, all the code is BSD license, so
you're at liberty to do so).


John


From datta.abhirup at gmail.com  Wed Mar 28 23:40:22 2007
From: datta.abhirup at gmail.com (datta.abhirup at gmail.com)
Date: 28 Mar 2007 20:40:22 -0700
Subject: Modal value of an array
Message-ID: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>

Hi

 How can I find out the modal value in an array. That is the value
which occurs maximum time in the sequence ..

e.g. if my array has values like [2,3,2,2,2,4,2,2]  definitely the
maximum time 2 occurs in the array. so this function should be able to
return 2 as a result ..

So is there any function in built in python which can do that ?


Thanks

Abhirup



From sumberbisnis at yahoo.com  Thu Mar 15 07:28:53 2007
From: sumberbisnis at yahoo.com (sumberbisnis at yahoo.com)
Date: 15 Mar 2007 04:28:53 -0700
Subject: Computer Job Vacancy
Message-ID: <1173958133.436419.40610@e65g2000hsc.googlegroups.com>

Computer Job Vacancy
http://www.jobbankdata.com/job-computer.htm



From stefan.behnel-n05pAM at web.de  Mon Mar  5 12:40:17 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 05 Mar 2007 18:40:17 +0100
Subject: Python object to xml biding
In-Reply-To: <1172517133.999532.180400@m58g2000cwm.googlegroups.com>
References: <1172517133.999532.180400@m58g2000cwm.googlegroups.com>
Message-ID: <45EC5601.8090101@web.de>

raf wrote:
> I'm looking for a python to XSD/xml biding library to easy handling
> this very large protocol spec I need to tackle. I've searched google
> quite extensibly and I haven't found anything that properly fits the
> bill... I'm mostly interested at the xml -> python and python->xml
> marshalling/unmarshalling much like jaxb for java.

Consider using lxml.objectify. It's extremely powerful and simple to use at
the same time.

http://codespeak.net/lxml/dev/objectify.html#element-access-through-object-attributes

http://codespeak.net/lxml/

Have fun,
Stefan


From duncan.booth at invalid.invalid  Fri Mar 23 11:56:23 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Mar 2007 15:56:23 GMT
Subject: How to list current line in pdb?
References: <1174663589.717404.169520@n76g2000hsh.googlegroups.com>
Message-ID: <Xns98FCA22302CBDduncanbooth@127.0.0.1>

"Chris Lasher" <chris.lasher at gmail.com> wrote:

> Using the pdb shell, after repeatedly entering 'l' (lowercase 'L'),
> how do I jump back to listing the current line again if I don't
> remember exactly what line my current line is? Do I just have to list
> an early line in the code and repeatedly list from there until I see
> the '->' indicating the current line?

Try:

(Pdb) alias ll u;;d;;l


and thereafter the 'll' command will list the current line (unless you are 
in the uppermost stack frame in which case it goes down one stackframe 
instead).

Save the alias in your .pdbrc file.


From while_isnot_until at yahoo.com  Thu Mar 29 15:19:24 2007
From: while_isnot_until at yahoo.com (void pointer)
Date: Thu, 29 Mar 2007 12:19:24 -0700 (PDT)
Subject: Hellow World:)
Message-ID: <765964.71169.qm@web63102.mail.re1.yahoo.com>

Hi All ..I am looking for PDF version of " Practical Python"  and a language to stick to .....Should I find that book ,I wil lconsder  this Python :)
   
  Thanks 
   

 
---------------------------------
Now that's room service! Choose from over 150,000 hotels 
in 45,000 destinations on Yahoo! Travel to find your fit.
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From gagsl-py2 at yahoo.com.ar  Mon Mar  5 20:59:33 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 Mar 2007 22:59:33 -0300
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<1172774172.389220.124170@j27g2000cwj.googlegroups.com>
	<1172834556.768612.164050@8g2000cwh.googlegroups.com>
Message-ID: <op.toqvtjkux6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 02 Mar 2007 08:22:36 -0300, Bart Ogryczak <B.Ogryczak at gmail.com>  
escribi?:

> On Mar 1, 7:36 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
> wrote:
>> Thanks Bart.  That's perfect.  The other suggestion was to precompute
>> count1 for all possible bytes, I guess that's 0-256, right?
>
> 0-255 actually. It'd be worth it, if accessing dictionary with
> precomputed values would be significantly faster then calculating the
> lambda, which I doubt. I suspect it actually might be slower.

Dictionary access is highly optimized in Python. In fact, using a  
precomputed dictionary is about 12 times faster:

py> import timeit
py> count1 = lambda x:  
(x&1)+(x&2>0)+(x&4>0)+(x&8>0)+(x&16>0)+(x&32>0)+(x&64>0)+
(x&128>0)
py> d256 = dict((i, count1(i)) for i in range(256))
py> timeit.Timer("for x in range(256): w = d256[x]", "from __main__ import  
d256"
).repeat(number=10000)
[0.54261253874445003, 0.54763468541393934, 0.54499943428564279]
py> timeit.Timer("for x in range(256): w = count1(x)", "from __main__  
import cou
nt1").repeat(number=10000)
[6.1867963665773118, 6.1967124313285638, 6.1666287195719178]

-- 
Gabriel Genellina



From deets at nospam.web.de  Thu Mar 29 06:05:23 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 Mar 2007 12:05:23 +0200
Subject: with timeout(...):
In-Reply-To: <slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<mailman.5697.1175060331.32031.python-list@python.org>
	<slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
Message-ID: <571hbfF2a7ngiU1@mid.uni-berlin.de>

> 
> I beleive the convention is when calling an OS function which might
> block the global interpreter lock is dropped, thus allowing other
> python bytecode to run.


So what? That doesn't help you, as you are single-threaded here. The 
released lock won't prevent the called C-code from taking as long as it 
wants. |And there is nothing you can do about that.

Diez


From jon+usenet at unequivocal.co.uk  Wed Mar 21 13:42:53 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 21 Mar 2007 17:42:53 GMT
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<4Rf*J7eGr@news.chiark.greenend.org.uk>
Message-ID: <slrnf02rkt.4ef.jon+usenet@snowy.squish.net>

In article <4Rf*J7eGr at news.chiark.greenend.org.uk>, Sion Arrowsmith wrote:
> Jon Ribbens  <jon+usenet at unequivocal.co.uk> wrote:
>>  if sys.hexversion < 0x020400f0:
>>    ... error ...
> 
> "Readability counts."
> 
> if sys.version_info < (2, 4):
>     ... error ...

Maybe you should suggest a patch to the Python documentation then ;-)

The formula I mentioned is the one suggested in the official Python
documentation ( http://docs.python.org/lib/module-sys.html#l2h-5143 )
as being the way to check the Python version.


From paul at boddie.org.uk  Thu Mar  8 06:17:47 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 8 Mar 2007 03:17:47 -0800
Subject: multithreading concept
In-Reply-To: <mZQHh.5714$M65.716@newssvr21.news.prodigy.net>
References: <mailman.3639.1170813233.32031.python-list@python.org>
	<1170865166.423764.87050@s48g2000cws.googlegroups.com>
	<mZQHh.5714$M65.716@newssvr21.news.prodigy.net>
Message-ID: <1173352667.089875.174620@q40g2000cwq.googlegroups.com>

On 8 Mar, 10:48, Bryan Olson <fakeaddr... at nowhere.org> wrote:
>
> That doesn't really work in Python. There have been projects to
> allow Pythonic coordination of processes -- POSH had some good
> ideas -- but none have reached fruition.

What makes all of the following not "Pythonic"...?

http://wiki.python.org/moin/ParallelProcessing

Things like the CSP paradigm have sort of made their way into the
Python language itself, via enhancements to the yield keyword, which
has the dubious distinction of being a keyword which appears to return
a value. I'm sure one could define "Pythonic" as being "you can write
code like you do now (but not like any of the ways encouraged by the
aforementioned solutions) and it just works over multiple processors/
cores", but that's a view which is somewhat detached from the
practicalities (and favoured practices) of concurrent programming,
especially given the few guarantees Python would be able to provide to
make such a thing work effectively.

Paul



From adonis at REMOVETHISearthlink.net  Mon Mar 19 15:20:44 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Mon, 19 Mar 2007 19:20:44 GMT
Subject: Writing files
Message-ID: <goBLh.129192$_73.83550@newsread2.news.pas.earthlink.net>

I am writing a program that walks a directory full of mp3s reads their 
ID3 data (using Mutagen), this part works perfectly. The problem is I 
write these tags to a CSV file through the CSV module. But when I read 
the file the file seems to be incomplete. Further inspecting it has 
seemed to have stopped writing to the file at a certain point. Something 
in my code? a bug?

System: Linux 2.4.31 (Slackware), Python 2.5c1

Any help is greatly appreciated.

Adonis

-- code --

     def _scan(self):
         outFile = file("mp3.dat", "wb")
         outCSV = csv.writer(outFile)
         output = list()
         for root, dirs, files in os.walk(self.directory):
             files = [x for x in files if x.endswith(".mp3")]
             for aFile in sorted(files):
                 mp3Data = MP3(os.path.join(root, aFile))
                 title = mp3Data.get("TIT2")
                 output.append([root, aFile, title])
             outCSV.writerows(output)
             output = list()


From kw at codebykevin.com  Fri Mar 30 16:39:14 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 30 Mar 2007 16:39:14 -0400
Subject: Tkinter menu question--how to pass arguments
In-Reply-To: <dave.opstad-2AE2AD.13133630032007@reader0903.news.uu.net>
References: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
	<dave.opstad-2AE2AD.13133630032007@reader0903.news.uu.net>
Message-ID: <460D7572.4050602@codebykevin.com>

Dave Opstad wrote:
> In article <85c10$460d65c8$4275d90a$19337 at FUSE.NET>,
>  Kevin Walzer <kw at codebykevin.com> wrote:
> 
>> I'm having difficulty structuring a Tkinter menu entry. Here is the 
>> command in question:
>>
>> self.finkmenu.add_command(label='Update List of Packages', 
>> command=self.authorizeCommand(self.scanPackages))
>>
>> When I start my program, it crashes because it's trying to run the 
>> command self.authorizeCommand. The reason I'm structuring it in this 
>> fashion is that this command takes another command as an argument--in 
>> this case, self.ScanPackages.
>>
>> The basic structure of the program is that the self.authorizeCommand 
>> function pops up a dialog box for a password; it then feeds the password 
>> to the function that it takes as an argument, i.e. self.scanPackages.
>>
>> I tried setting up the menu entry without the additional parameter, i.e. 
>> command=self.authorizeCommand, but then when I try to run the command 
>> from the menu, it complains there are not enough arguments. 
>> Unsurprising, since self.authorizeCommand takes another function name as 
>> an argument.
>>
>> How can I structure the menu item to reflect the correct number of 
>> arguments without it trying to execute the command?
> 
> If self.scanPackages exists as an attribute of self, why do you need to 
> pass it in? If your command is just self.authorizeCommand, and that 
> method makes use of self.scanPackages when it runs, then it all should 
> work without your having to specify it here.
> 
> Dave
self.AuthorizeCommand is a generic  dialog to feed a password to several 
different commands. So, the specific function needs to be specified as a 
parameter.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From nobody at invalid.com  Thu Mar 22 14:04:35 2007
From: nobody at invalid.com (Erik Johnson)
Date: Thu, 22 Mar 2007 12:04:35 -0600
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<mailman.5432.1174527485.32031.python-list@python.org>
	<1174528562.192439.84480@l77g2000hsb.googlegroups.com>
	<mailman.5434.1174529222.32031.python-list@python.org>
	<1174529622.860892.133800@d57g2000hsg.googlegroups.com>
	<4602bb9f@nntp.zianet.com>
Message-ID: <4602c52d$1@nntp.zianet.com>

Actually, after studying this a bit more:
http://docs.python.org/ref/assignment.html

I guess that makes sense. Sorry if I muddied the water for anyone else in my
boat:

n1 = n1.next = n2

The first thing that happens is the expression list is evaluated which is
the thing on the far right, n2. That is a simple object reference which is
then assigned to each of the target lists, left to right, of which there are
two: n1 and n1.next.

So, first, n1 is assigned the same value n2 has.

Next, n1.next is assigned n2 (The object n1 refers to, which is also now n2,
is assigned a new attribute, that value of which is n2).

So, yeah... as Terry Reedy said: better to be explicit about what you want
to happen first and not mash them together into one line.

That would be... how do you say... "Pythonic"?

(God, I feel so much better now. LOL)




From lbates at websafe.com  Tue Mar 13 14:02:48 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 13 Mar 2007 13:02:48 -0500
Subject: struct.pack oddity
In-Reply-To: <45f6d7a9$1@nntp.zianet.com>
References: <45f6bd4a$0$6972$afc38c87@> <45f6d7a9$1@nntp.zianet.com>
Message-ID: <P6edncuAzZrYemvYnZ2dnUVZ_qLinZ2d@comcast.com>

Erik Johnson wrote:
> "Dave Opstad" <dave.opstad at monotypeimaging.com> wrote in message
> news:45f6bd4a$0$6972$afc38c87 at ...
>> Is the lack of a struct.error when the byte-order mark is at the start
>> of the format intentional? This seems like a bug to me, but maybe
>> there's a subtlety here I'm not seeing.
> 
>     I am by no means any sort of expert on this module, but for what it's
> worth, the behaviour is basically the same for my Python 2.4.3 under Cygwin
> (except that there is no deprecation warning) and I agree with you: this
> seems like a bug to me. Or maybe not technically a bug, but the behaviour
> could be improved. I would expect to get the same struct.error in all three
> cases:
> 
> $ python
> Python 2.4.3 (#1, May 18 2006, 07:40:45)
> [GCC 3.3.3 (cygwin special)] on cygwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from struct import *
>>>> pack('H', 100000)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> struct.error: short format requires 0<=number<=USHRT_MAX
>>>> pack('>H', 100000)
> '\x86\xa0'
>>>> pack('<H', 100000)
> '\xa0\x86'
> 
>     There used to be a form at the bottom left of the main site:
> www.python.org for reporting bugs, but that now seems to be used only for
> reporting stuff about the web site itself.  The struct module comes from
> struct.dll, so I can't see any comments about who wrote or maintains that
> module.
> 
>     Barring anyone else disagreeing with classifying it as a bug, I would
> suggest reporting it. Proper procedure for reporting a bug appears to be
> covered in section B of the Python Library Reference:
> http://docs.python.org/lib/reporting-bugs.html
> 
> Hope that helps,
> -ej
> 
> 
It looks like you have multiple "issues".

1) You can't put 100000 into a half-word.  The limit is 2**16
or 65535. On Python 2.5 I get:

>>> struct.pack('H', 100000)
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "C:\Python25\lib\struct.py", line 63, in pack
    return o.pack(*args)
error: short format requires 0 <= number <= USHRT_MAX
>>> struct.pack('H', 65535)
'\xff\xff'
>>> struct.pack('>H', 100000)
C:\Python25\Lib\struct.py:63: DeprecationWarning: 'H' format requires 0 <=
number <= 65535
  return o.pack(*args)
'\x86\xa0'
>>> struct.pack('<H', 100000)
'\xa0\x86'
>>>

On the last try, struct.pack('<H', 100000) I would classify
that as an oversight/bug but its not something that you should
be trying to do because it doesn't make sense anyway.

-Larry


From steve at REMOVEME.cybersource.com.au  Tue Mar 13 21:29:48 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 14 Mar 2007 12:29:48 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<mailman.5007.1173770416.32031.python-list@python.org>
Message-ID: <pan.2007.03.14.01.29.47.73249@REMOVEME.cybersource.com.au>

On Tue, 13 Mar 2007 08:20:49 +0200, Hendrik van Rooyen wrote:

> Is it possible to devise a test that can distinguish between sets
> of:
> 
> - five random numbers that add to 50, and
> - four random numbers and a fudge number that add to 50?
> 
> My stats are way too small and rusty to attempt to answer 
> the question, but it seems intuitively a very difficult thing.

Easy-peasey. Just collate the individual numbers from the lists, and graph
their frequencies. You will get quite different distributions. Both are
"random", but in different ways.

Here is some code to do it.

import random

def method1(total, count):
    """SLOW way of generating random lists."""
    L = []
    while sum(L) != total:
        L = [random.randint(1, total) for i in range(count)]
    assert sum(L) == total
    assert len(L) == count
    return L

def method2(total, count):
    if total <= 0 or count <= 0:
        return []
    elif count == 1:
        return [total]
    else:
        n = random.randint(1, total-count)
        L = [n] + method2(total-n, count-1)
    assert sum(L) == total
    assert len(L) == count
    return L


def collate_numbers(method, count):
    bins = {}
    for i in xrange(count):
        L = method(50, 5)
        for n in L:
            bins[n] = bins.get(n, 0) + 1
    return bins


I'll leave graphing the results as a exercise for the reader, but here's a
sample I prepared earlier:


>>> d1  # bins from method1()
{1: 208, 2: 207, 3: 158, 4: 167, 5: 162, 6: 146, 7: 142, 8: 115, 
9: 114, 10: 113, 11: 94, 12: 98, 13: 92, 14: 68, 15: 60, 16: 70, 
17: 58, 18: 56, 19: 57, 20: 44, 21: 25, 22: 36, 23: 27, 24: 34, 
25: 23, 26: 18, 27: 18, 28: 13, 29: 13, 30: 8, 31: 13, 32: 17, 
33: 7, 34: 1, 35: 5, 36: 4, 37: 3, 38: 2, 39: 1, 40: 2, 44: 1}

>>> d2  # bins from method2()
{1: 370, 2: 387, 3: 222, 4: 190, 5: 129, 6: 106, 7: 95, 8: 84, 
9: 64, 10: 61, 11: 47, 12: 56, 13: 45, 14: 35, 15: 39, 16: 26, 
17: 34, 18: 25, 19: 36, 20: 34, 21: 30, 22: 25, 23: 20, 24: 23, 
25: 18, 26: 19, 27: 24, 28: 15, 29: 17, 30: 21, 31: 14, 32: 12, 
33: 16, 34: 16, 35: 14, 36: 14, 37: 15, 38: 11, 39: 19, 40: 13, 
41: 14, 42: 16, 43: 8, 44: 11, 45: 10}


Even from the raw numbers, the differences are obvious. A bar graph makes
it even clearer.


-- 
Steven D'Aprano 



From tommy.nordgren at comhem.se  Sun Mar 11 10:33:33 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Sun, 11 Mar 2007 15:33:33 +0100
Subject: Python books?
In-Reply-To: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
Message-ID: <94714402-3C73-4E14-82DD-B4E34D8F1D0A@comhem.se>


On 9 mar 2007, at 04.06, Tommy Nordgren wrote:

> Could some kind soul please recommend a few text books on Python 2.5
> and it's class library?
>
	I've found one interesting text book on Python:
Mark Lutz - Programming Python, 3rd Edition.
How do you rate it?
	One of the reasons I find it interesting is because of it's hefty  
page count
- over 1500 pages.
------------------------------------------------------
"Home is not where you are born, but where your heart finds peace" -
Tommy Nordgren, "The dying old crone"
tommy.nordgren at comhem.se




From nagle at animats.com  Thu Mar 22 20:05:58 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 23 Mar 2007 00:05:58 GMT
Subject: What is the best way to upgrade python?
In-Reply-To: <mailman.5483.1174591372.32031.python-list@python.org>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
	<mailman.5483.1174591372.32031.python-list@python.org>
Message-ID: <GREMh.658$rO7.207@newssvr25.news.prodigy.net>

Facundo Batista wrote:
> yinglcs at gmail.com wrote:
> 
> 
> 
>>i am using red hat enterprise 4. It has python 2.3 installed. What is
>>the best way to upgrade to python 2.4?

    Very carefully.

    All the C libraries that work with Python are version-dependent.

				John Nagle


From stefaan.himpe at gmail.com  Mon Mar 19 06:05:11 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 19 Mar 2007 03:05:11 -0700
Subject: XML based programming language
In-Reply-To: <5655asF26decfU1@mid.uni-berlin.de>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
Message-ID: <1174298711.440674.114510@o5g2000hsb.googlegroups.com>

Thank you Diez for answering.
As far as I can see, it more or less corresponds to what I have.

But my question was perhaps more this:

"If elementtree is "lex", what is "yacc" ? "




From aleax at mac.com  Thu Mar 29 22:14:26 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 19:14:26 -0700
Subject: how can I clear a dictionary in python
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com>
	<KP-dnXOp7ea8IZbbnZ2dnUVZ_oCmnZ2d@comcast.com>
	<460bcf46$0$23128$426a74cc@news.free.fr>
	<460BEBE5.3030607@websafe.com>
	<1175217038.639561.181100@n59g2000hsh.googlegroups.com>
Message-ID: <1hvr3fb.zmcz4i1aujj7eN%aleax@mac.com>

Russ <uymqlp502 at sneakemail.com> wrote:

> This little squabble got me thinking. I normally just use the
> myDict={} method of "clearing" a
> dictionary when I know there are no other references to it. However, I
> wonder how the
> efficiency of relying on the garbage collector to clear a dictionary
> compares with using the
> "clear" method. Does anyone know?

Well, anybody who bothers to *MEASURE* can start building an idea.

When the dict's already empty:

brain:~ alex$ python -mtimeit 'd={}'
10000000 loops, best of 3: 0.113 usec per loop
brain:~ alex$ python -mtimeit 'd={}; d={}'   
1000000 loops, best of 3: 0.207 usec per loop
brain:~ alex$ python -mtimeit 'd={}; d.clear()'
1000000 loops, best of 3: 0.316 usec per loop

Making one dict costs about 100 nanoseconds, making two of them costs
about 200 (sensible), making one and clearing it 300 (so just the
clearing, on an empty dict, about 200 nanoseconds).

Unfortunately, microbenchmarks of operations which do change the state
their timing depend on are trickier.  Still, here's an attempt:

brain:~ alex$ python -mtimeit -s'D=dict.fromkeys(xrange(99))'
'd=D.copy()'
100000 loops, best of 3: 6.73 usec per loop
brain:~ alex$ python -mtimeit -s'D=dict.fromkeys(xrange(99))'
'd=D.copy();d={}'
100000 loops, best of 3: 6.76 usec per loop
brain:~ alex$ python -mtimeit -s'D=dict.fromkeys(xrange(99))'
'd=D.copy()'
100000 loops, best of 3: 6.73 usec per loop
brain:~ alex$ python -mtimeit -s'D=dict.fromkeys(xrange(99))'
'd=D.copy();d={}'
100000 loops, best of 3: 6.78 usec per loop
brain:~ alex$ python -mtimeit -s'D=dict.fromkeys(xrange(99))'
'd=D.copy();d.clear()'
100000 loops, best of 3: 6.94 usec per loop
brain:~ alex$ python -mtimeit -s'D=dict.fromkeys(xrange(99))'
'd=D.copy();d.clear()'
100000 loops, best of 3: 6.93 usec per loop

Here, making a middly-size dict costs about 6730 nanoseconds.  
Making an empty one as well adds 30-50 nanoseconds; clearing the middly
one instead ads 200 nanoseconds or so.

It would appear that clearing an existing dict costs about twice as much
(or more) as making a new one (200 nanoseconds vs 100 nanoseconds or
less) for different sizes of the existing dict.

This is on a 2GHz Intel Core Duo with Python 2.5 -- measures of a few
tens of nanoseconds can be "noisy" enough to change substantially on
different release of Python or different CPUs.

Fortunately, it's unusual to care about such tiny performance issues
(here, the time to build the dictionary would normally swap the time to
clear it, OR to assign an empty one instead, by over an order of
magnitude, so...).


Alex


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 06:20:18 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 12:20:18 +0200
Subject: Python object overhead?
In-Reply-To: <46079426$0$3272$426a74cc@news.free.fr>
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<46079426$0$3272$426a74cc@news.free.fr>
Message-ID: <46079e62$0$14533$426a74cc@news.free.fr>

Bruno Desthuilliers a ?crit :
> Matt Garman a ?crit :
(snip)
> class FileRecord(object):
> 
>>    def __init__(self, line):
>>        self.line = line
> 
> If this is your real code, I don't see any reason why this should eat up 
> 3 times more space than the original version.
> 

Hem... Forget about this comment - not enough coffein yet I'm afraid.


From zefirek at Speacock.Pau.Apoznan.Mpl  Sun Mar  4 08:35:42 2007
From: zefirek at Speacock.Pau.Apoznan.Mpl (zefciu)
Date: Sun, 04 Mar 2007 14:35:42 +0100
Subject: Converting a c array to python list
In-Reply-To: <xDlGh.5978$PL.1213@newsread4.news.pas.earthlink.net>
References: <es66m4$cnr$1@inews.gazeta.pl>
	<rowen-9DEBB0.13090902032007@gnus01.u.washington.edu>
	<esbq43$3ne$1@inews.gazeta.pl>
	<xDlGh.5978$PL.1213@newsread4.news.pas.earthlink.net>
Message-ID: <eseht1$pam$1@inews.gazeta.pl>

Dennis Lee Bieber wrote:

> 	Written properly, all it returns is the address of that array data
> -- there is no massive copying of data..

I know :)  That's why I want to know how to write it properly.

zefciu


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 08:48:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 13:48:58 +0100
Subject: IDE for wxPython
In-Reply-To: <mailman.5235.1174178014.32031.python-list@python.org>
References: <mailman.5235.1174178014.32031.python-list@python.org>
Message-ID: <45fe86b8$0$29768$426a34cc@news.free.fr>

Ghirai a ?crit :
> Hello python-list,
> 
> Can anyone suggest an IDE for wxPython?
> Or an IDE for TkInter?

Do you really mean IDE, or are you in fact looking for a GUI designer 
tool ? If the latter, you may want to have a look at wxGlade.


From gagsl-py2 at yahoo.com.ar  Sun Mar 25 23:20:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 Mar 2007 00:20:16 -0300
Subject: replacing one instance with another
References: <1174873114.590028.130920@p15g2000hsd.googlegroups.com>
	<1174873457.277591.135390@y66g2000hsf.googlegroups.com>
	<1174876491.928319.223440@y66g2000hsf.googlegroups.com>
Message-ID: <op.tpr0v2w9x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 23:34:51 -0300, manstey <manstey at csu.edu.au> escribi?:

> I've realised after further testing and reading that I actually need
> to do this:
>
>>>> dic_myinstances={}
>>>> class MyClass(object):
>     def __new__(cls,id):
>         global dic_myinstances
>         if dic_myinstances.has_key(id):
>             return dic_myinstances[id]
>         else:
>             dic_myinstances[id] = super(MyClass, cls).__new__(cls, id)
>             return dic_myinstances[id]
>     def __init__(self,id):
>         print id
>
>>>> ins1 = MyClass('xx')
> 'xx'
>>>> ins2 = MyClass('yy')
> 'yy'
>>>> ins3 = MyClass('xx')
> 'xx'
>>>> ins3 is ins1
> True

That's fine, but notice that __init__ is called even if the instance  
already exists. That's usually undesirable, and you can use a factory  
function instead:

def MyClassFactory(id):
     inst = dic_myinstances.get(id)
     if inst is None:
         dic_myinstances[id] = inst = MyClass(id)
     return inst

(Notice that no global statement is needed, even on your __new__)
You can make it a static method if you wish.

-- 
Gabriel Genellina



From laurent.pointal at limsi.fr  Fri Mar 30 07:53:57 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 30 Mar 2007 13:53:57 +0200
Subject: Library for windows ini-files ?
In-Reply-To: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
References: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
Message-ID: <euito5$ntl$1@news2.u-psud.fr>

stef a ?crit :
> hello,
> 
> is there a Python library for easy reading and writing windows ini-files ?

http://docs.python.org/lib/module-ConfigParser.html

A+

Laurent.


From robert.kern at gmail.com  Mon Mar 26 12:27:13 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 26 Mar 2007 11:27:13 -0500
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1hvknm0.ph0nmh4ucf31N%aleax@mac.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>	<mailman.5628.1174916538.32031.python-list@python.org>	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<1hvknm0.ph0nmh4ucf31N%aleax@mac.com>
Message-ID: <eu8s9b$b75$1@sea.gmane.org>

Alex Martelli wrote:
> Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:
>    ...
>>> So I'ld suggest to start with downloading the Enthought edition of Python,
>>> and you can judge for yourself within 10 minutes,
>>> if it's fast enough.
>>>
>>> cheers,
>>> Stef Mientki
>> Is there a mac version??
> 
> <http://download.enthought.com/MacEnthon/ReadMe.html> but it's self
> labeled as "0.1 Test Release" i.e. somewhat preliminary; it claims to
> support only Panther (10.3) and its 2.3.0 Python (no claims for Tiger,
> 10.4, and its 2.3.5 Python, nor for other Python Mac istalls yet).

It no longer exists, in fact. I don't know why the readme still exists, too.

> If you're just trying to learn and check things out, it might be better
> to get a more recent Python from python.org (2.5 or 2.4.4) and the
> various other packages as and when you need them (you can use the
> MacEnthon list as a guide:-).  You'll need a C compiler to be sure you
> can install any package from sources -- Apple's XCode includes gcc, it's
> free, and it's the safest choice (but it's a HUGE download, as it comes
> with a lot of stuff -- I don't think Apple offers a simple way to
> install "just" gcc and minimal supporting tools).

Here are some more instructions for building the usual suspects: numpy, scipy,
VTK, PIL, ipython, matplotlib.

  https://svn.enthought.com/enthought/wiki/IntelMacPython25

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From henriklied at gmail.com  Tue Mar 13 05:45:28 2007
From: henriklied at gmail.com (Henrik Lied)
Date: 13 Mar 2007 02:45:28 -0700
Subject: Starting an external, independent process from a script
In-Reply-To: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
References: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
Message-ID: <1173779128.069326.40100@n33g2000cwc.googlegroups.com>

I've tried os.spawnv and os.spawn, but these give no error and no
result.


Henrik Lied skreiv:
> Hi there!
>
> I'm trying to create a video uploading service (just to learn). The
> system is mostly based on Django, but the question I'm looking an
> answer for is more related to Python.
>
> So, the user gets to upload a video file. This can either be a mpg,
> avi or mp4-file. When the file is saved to its location, I want to
> convert it to FLA (Flash Video). I'm currently using Mplayers
> Mencoder, and this works great. The Mencoder is retrieved through
> running os.system("mencoder variables here")
>
> The problem with this is that the user has to wait until the movie is
> done encoding until he can go around with his business. I don't look
> upon this as ideal.
>
> So - I want to spawn a new system process. I need some good pointers
> on how to do this right.
>
> Any input? :-)
>
> Thanks a lot in advance!



From http  Wed Mar  7 22:24:38 2007
From: http (Paul Rubin)
Date: 07 Mar 2007 19:24:38 -0800
Subject: Bug in python!? persistent value of an optional parameter in
	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
Message-ID: <7xy7m8beo9.fsf@ruckus.brouhaha.com>

John Nagle <nagle at animats.com> writes:
>     True.  It would make sense to disallow mutable values as
> initial values for optional arguments.  The present behavior is silly.

That would be the worst of both worlds.  The main alternative to the
present behavior is re-computing the default value every time the
function is entered.  


From irmen.NOSPAM at xs4all.nl  Tue Mar 20 18:06:58 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Tue, 20 Mar 2007 23:06:58 +0100
Subject: ANN: Pyro 3.6 (remote objects)
Message-ID: <46005b38$0$327$e4fe514c@news.xs4all.nl>

I'm happy to announce Pyro 3.6 --
Python's own powerful remote method invocation technology!

You can get it via http://pyro.sourceforge.net, then go to the SF project homepage 
download area.

It has many new features and improvements over Pyro 3.5, which was released more than a 
year ago. (Sorry about the glacial update rate)

Most important new stuff:
- python 2.5 compatibility fixes
- multithreading stability fixes
- mobile code race condition fixes
- a few new examples
- various stability improvements and other fixes
- new looks for the manual

The full list is far too long to include here. Please view it online:
http://pyro.sourceforge.net/manual/12-changes.html#latest


Have fun, and thanks for your interest, support, and feedback!

--Irmen de Jong


---> What is Pyro?
Pyro is an acronym for PYthon Remote Objects. Pyro is an advanced and powerful 
Distributed Object Technology system written entirely in Python, that is designed to be 
very easy to use.

It is extremely easy to implement a distributed system with Pyro, because all network 
communication code is abstracted and hidden from your application. You just get a remote 
Python object and invoke methods on the object on the other machine.

Pyro offers you a Name Server, an Event Service, mobile objects, remote exceptions, 
dynamic proxies, remote attribute access, automatic reconnection, a very good and 
detailed manual, and many examples to get you started right away.



From codecraig at gmail.com  Thu Mar 29 07:14:26 2007
From: codecraig at gmail.com (abcd)
Date: 29 Mar 2007 04:14:26 -0700
Subject: Question about extending tuple
In-Reply-To: <mailman.5723.1175113676.32031.python-list@python.org>
References: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>
	<mailman.5721.1175111042.32031.python-list@python.org>
	<1175112084.430548.275000@b75g2000hsg.googlegroups.com>
	<mailman.5723.1175113676.32031.python-list@python.org>
Message-ID: <1175166866.703465.150850@d57g2000hsg.googlegroups.com>

>
> I hope you see now why it is consistent.
>
> Georg

yea that clears it up.  thanks.



From aleax at mac.com  Sun Mar 25 00:04:50 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 24 Mar 2007 21:04:50 -0700
Subject: Removing Python 2.4.4 on OSX
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5571.1174789089.32031.python-list@python.org>
	<1174794013.752495.42220@o5g2000hsb.googlegroups.com>
	<1174794172.156941.107550@y66g2000hsf.googlegroups.com>
Message-ID: <1hvhzvb.1qccr1i1ok96m7N%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> On Mar 24, 9:40 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> > On Mar 24, 8:18 pm, Michael Bentley <mich... at jedimindworks.com> wrote:
> >
> > > On Mar 24, 2007, at 12:30 PM, Robert Hicks wrote:
> >
> > > > I want to upgrade to 2.5 but I don't see any unistall instructions
> > > > anywhere.
> >
> > > Don't uninstall it.
> >
> > > That's why Apple put python under /Library/Frameworks/
> > > Python.framework/Versions.  So you can have multiple versions installed.
> >
> > /Libary/Frameworks/ is an empty directory(except for . and ..) on my
> > Mac, and I have 2.3.5 installed somewhere.
> 
> I mean /Library/Frameworks
> 
> Misspelled it in the post, but not when I searched it.  I did an ls -
> al on it and got this:
> 
> $ ls -al /Library/Frameworks
> total 0
> drwxrwxr-x    2 root  admin    68 Jul  1  2006 .
> drwxrwxr-t   43 root  admin  1462 Feb 20 14:31 ..

Try /System/Library/Frameworks ...


Alex


From knipknap at gmail.com  Wed Mar 14 16:22:10 2007
From: knipknap at gmail.com (Samuel)
Date: 14 Mar 2007 13:22:10 -0700
Subject: Converting a list to a dictionary
In-Reply-To: <45f8583d$0$10407$426a34cc@news.free.fr>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
	<45f8583d$0$10407$426a34cc@news.free.fr>
Message-ID: <1173903730.686234.229380@b75g2000hsg.googlegroups.com>

On Mar 14, 9:52 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> res_dict = dict((r.get_id(), r) for r in res_list)
>
> or if you have to be compatible with older python versions:
>
> res_dict = dict([(r.get_id(), r) for r in res_list])

Yep, that works. Strange, I was sure I had tested the latter, but I
must have been doing something wrong.

Thanks for your help!

-Samuel



From bearophileHUGS at lycos.com  Sun Mar 11 20:18:59 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 11 Mar 2007 17:18:59 -0700
Subject: Bitpacked Data
In-Reply-To: <55jeurF23phoqU1@mid.individual.net>
References: <45f47994$0$37205$4fafbaef@reader3.news.tin.it>
	<55jeurF23phoqU1@mid.individual.net>
Message-ID: <1173658739.176815.280100@c51g2000cwc.googlegroups.com>

Bjoern Schliessmann:
> I'd use the module struct, with bit shifting operators to extract
> the bits.

Maybe Pyrex can be used to create a small module that can manage
similar bitfields quickly and with a syntax not too much far from the
Erlang bit syntax.

Bye,
bearophile



From straton at lampsacos.demon.co.uk  Tue Mar 13 11:29:08 2007
From: straton at lampsacos.demon.co.uk (Ken Starks)
Date: Tue, 13 Mar 2007 15:29:08 +0000
Subject: help developing an editor to view openoffice files.
In-Reply-To: <mailman.5005.1173770157.32031.python-list@python.org>
References: <mailman.5005.1173770157.32031.python-list@python.org>
Message-ID: <et6g05$4av$1$8300dec7@news.demon.co.uk>

krishnakant Mane wrote:
> hello,
> right now I am involved on doing a very important accessibility work.
> as many people may or may not know that I am a visually handicap
> person and work a lot on accessibility.  the main issue at hand is to
> create an accessible editor for open office.
> there are a lot of things remaining on that front.
> so right now I am trying to find out a temporary work around by
> creating a simple accessible editor (with wxpython) for viewing and
> editing open office files.
> I know there must be python libraries that can open/ save .odt files
> because it is an open standard any ways.
> but I am trying to work out a kind of a program where those files can
> also be displayed in a text area with all the formatting.
> probably one way of doing it is to use some thing like a rich text
> editor and allow the file to be converted to rtf from odt for viewing
> and back again to odt when the user wishes to save it.
> another way I find is to actually find out if there is a odt text box
> that can display these files as they are.
> viewing the contents of the files in an editable way is most important.
> any suggestions?
> regards.
> Krishnakant.

There is an O'Reilly Book about hacking the Open Office Format, and
it is available free on line in both html and pdf.

Open office files are a variation on 'Zipped' archives and
many unzip tools can be used to open them, apart from ones
that insist on a .zip extension. These include python tools.

The one 'case study' in the book that uses python is actually for
a spreadsheet, but that makes little difference to the
'unzipping' part.  You can find it at:

http://books.evc-cit.info/odbook/ch05.html#modify-spreadsheet-section

Once you have the raw XML you should be able to convert it to any one of
many more accessible XML formats, for screen readers, brail
printers and so on. I don't know much about them, but hopefully you
do!

Don't re-invent the wheel! You will find quite a few ways on the Open
Office Wiki for converting the format to other things. You can also
daisy-tail the XSLT files; for example use one to convert to xhtml and
a second that converts xhtml to text.

Example (Display write files in the 'Firefox' browser).
http://wiki.services.openoffice.org/wiki/Firefox_ODFReader_extension


Don't forget that Open Office already has PDF export facilities, and
Acrobat reader already has some accessibility ability for simple 
documents (i.e single column, 'start at the beginning, keep going until
you get to the end, and then stop'). For adding structure to other PDF 
files you would need Acrobat Professional or software that can export 
'tagged' PDFs.

The case-study code is:

import xml.dom
import xml.dom.ext
import xml.dom.minidom
import xml.parsers.expat
import sys
import od_number
from zipfile import *
from StringIO import *

if (len(sys.argv) == 4):

     #   Open an existing OpenDocument file
     #
     inFile = ZipFile( sys.argv[1] )

     #   ...and a brand new output file
     #
     outFile = ZipFile( sys.argv[2], "w", ZIP_DEFLATED );

     getParameters( sys.argv[3] )

     #
     #   modify all appropriate currency styles
     #
     fixCurrency( "styles.xml" )
     fixCurrency( "content.xml" )

     #
     #   copy the manifest
     #
     copyManifest( )

     inFile.close
     outFile.close
else:
     print "Usage: " + sys.argv[0] + " inputfile outputfile parameterfile"


From bignose+hates-spam at benfinney.id.au  Fri Mar 23 05:38:42 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 23 Mar 2007 20:38:42 +1100
Subject: Making a non-root daemon process
References: <mailman.5504.1174630787.32031.python-list@python.org>
	<1174641365.623257.105690@p15g2000hsd.googlegroups.com>
Message-ID: <878xdo1eql.fsf@benfinney.id.au>

"Leo Kislov" <Leo.Kislov at gmail.com> writes:

> On Mar 22, 11:19 pm, Ben Finney <b... at benfinney.id.au> wrote:
> > The problem I'm having is that 'os.setsid()' fails with 'OSError:
> > [Errno 1] Operation not permitted' unless I run the program as the
> > root user. This isn't a program that I want necessarily running as
> > root.
>
> It works for me. I mean your program above produces no exceptions
> for me on Debian 3.1 python2.4

Hmm. I typed the example program in as a simplified version of what
I'm doing; but didn't actually *run* it. When I do run it, I get no
exception, as you say.

Now I'll have to find out what significant difference there is between
my failing code and this example, and report back in this thread.

Thanks for showing me this far :-)

-- 
 \        "Some people, when confronted with a problem, think 'I know, |
  `\   I'll use regular expressions'. Now they have two problems."  -- |
_o__)                            Jamie Zawinski, in alt.religion.emacs |
Ben Finney



From steve at holdenweb.com  Mon Mar 26 02:40:16 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 26 Mar 2007 02:40:16 -0400
Subject: call to function by text variable
In-Reply-To: <qrujd4-s5u.ln1@lairds.us>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>	<mailman.5604.1174863631.32031.python-list@python.org>
	<qrujd4-s5u.ln1@lairds.us>
Message-ID: <eu7pv3$san$1@sea.gmane.org>

Cameron Laird wrote:
> In article <mailman.5604.1174863631.32031.python-list at python.org>,
> Jan Schilleman <jan.schilleman at xs4all.nl> wrote:
>> Hi,
>>
>> try this:
>> func = getattr(operations, ["Replace", "ChangeCase", "Move"][n])
>>
>> HTH,
>> Jan
>>
>> "ianar?" <ianare at gmail.com> schreef in bericht 
>> news:1174862186.134912.117270 at p15g2000hsd.googlegroups.com...
>>> yeah the subject doesn't really make sense does it?
>>>
>>> anyway want I want to do is this:
>>> if n == 1:
>>>
>>>    self.operations.insert(pos, operations.Replace.Panel(self, main))
> 			.
> 			.
> 			.
> I think you meant "...[n - 1]" rather than "...[n]".
> 
> I'm a tiny bit surprised no one has organized this in terms
> of a dictionary.  I don't know, of course, how robust is the
> characterization of n as a small integer.  Maybe
> 
>   lookup_table = {
>       0: "Replace",
>       1: "ChangeCase",
>       2: "Move"}
> 
> captures the sentiment; maybe something else does it better.
> 
Surely for this requirement the *only* advantage of a dictionary over a 
list is its ability to index with arbitrary values and thereby avoid the 
need to use [n-1]. Wouldn't it therefore be less perverse to use

     lookup_table = {
       1: "Replace",
       2: "ChangeCase",
       3: "Move"}

Of course the dictionary would be a big win if the integer choice values 
weren't a linear sequence. Otherwise using a list with a fixed offset is 
likely to be quicker.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From gagsl-py2 at yahoo.com.ar  Mon Mar 12 04:59:19 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 12 Mar 2007 05:59:19 -0300
Subject: Watching a file another app is writing
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
	<1173676363.653940.133030@30g2000cwc.googlegroups.com>
	<vu-dnXYa49qinWjYnZ2dnUVZ_viunZ2d@comcast.com>
Message-ID: <op.to2i86spx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Mon, 12 Mar 2007 04:25:48 -0300, Gordon Airporte <JHoover at fbi.gov>  
escribi?:

> Nick Vatamaniuc wrote:
>   > You might need to look at pywin32 for Windows specific ways to listen
>> to "file changed" event.

This article explains it in detail:
http://tgolden.sc.sabren.com/python/win32_how_do_i/watch_directory_for_changes.html
BTW, it's the top result on Google for "python notify file change windows"

-- 
Gabriel Genellina



From greg at cosc.canterbury.ac.nz  Mon Mar 19 21:01:32 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 20 Mar 2007 13:01:32 +1200
Subject: Documentation for "str()" could use some adjustment - Unicode
	issue
In-Reply-To: <DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
	<mailman.5276.1174294980.32031.python-list@python.org>
	<DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>
Message-ID: <568q80F289mbjU1@mid.individual.net>

John Nagle wrote:
> and when we get to
> Unicode-only strings, "str" will never raise a conversion exception.

On *strings*, maybe, but objects can implement __str__ in
arbitrary ways, so you can't say anything in general about
what str() will do.

--
Greg


From bj_666 at gmx.net  Fri Mar 16 09:25:11 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 16 Mar 2007 14:25:11 +0100
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.16.13.25.10.380016@gmx.net>

In <1174045298.826137.262890 at o5g2000hsb.googlegroups.com>, Gerald wrote:

> Can you recommend websites that feature a gentle introduction to Python?

If you already know programming in general, `Dive Into Python`_ might be a
good starting point.  And of course the tutorial in the Python
documentation.

_Dive Into Python: http://www.diveintopython.org/

Ciao,
	Marc 'BlackJack' Rintsch


From soyouthinkimgonnalikethis at hotmail.com  Sat Mar 31 11:10:17 2007
From: soyouthinkimgonnalikethis at hotmail.com (Eric Price)
Date: Sat, 31 Mar 2007 11:10:17 -0400
Subject: os.system questions
In-Reply-To: <9d6d3deb0703310722s7f11b4aemde653e3edc4b0fc4@mail.gmail.com>
Message-ID: <BAY114-F26E24B5A0617CD9A2E31B7A0620@phx.gbl>

Thank you :)
Eric


>From: "Parthan SR" <python.technofreak at gmail.com>
>To: "Eric Price" <soyouthinkimgonnalikethis at hotmail.com>
>Subject: Re: os.system questions
>Date: Sat, 31 Mar 2007 19:52:01 +0530
>
>On 3/31/07, Eric Price <soyouthinkimgonnalikethis at hotmail.com> wrote:
>>
>>Oops! The problem isn't in the os.system call. It's in the fact that I
>>don't
>>call the function. That is, I write a script called "test.py" with a
>>function in it called "freshReboot". Now, how do I call that function from
>>test.py? That is, how do I write a cron event such that "freshReboot"
>>actually gets called when I run test.py?
>
>
>Just call the function name within the test.py itself
>
>def freshReboot():
>...
>...
>...
>...
>
>if __name__ == '__main__':
>    freshReboot()
>
>(or)
>
>freshReboot()
>
>Now, run test.py. If you are printing anything or having a return value,
>then it will be displayed in the terminal from where you call the program.
>If you are executing it from another script, then the return value will be
>returned where it is being called.
>--
>With Regards
>
>---
>Parthan.S.R.
>Research Assistant
>National Resource Center for Free/Open Source Software
>Python Developer n00b

_________________________________________________________________
Interest Rates near 39yr lows! $430,000 Mortgage for $1,399/mo - Calculate 
new payment 
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From andmarti at gmail.com  Mon Mar 19 01:22:02 2007
From: andmarti at gmail.com (andmarti at gmail.com)
Date: Mon, 19 Mar 2007 02:22:02 -0300
Subject: struct.pack returns nothing [2]
In-Reply-To: <20070319051239.GA8214@lacordilleraandina.com.ar>
References: <20070319051239.GA8214@lacordilleraandina.com.ar>
Message-ID: <20070319052202.GA8449@lacordilleraandina.com.ar>

On Mon, Mar 19, 2007 at 02:12:39AM -0300, andmarti at gmail.com wrote:
> If I build a strict with:
Sorry, I meant script.
> 
> import struct
> print struck.pack ('i', 1)
> 
> it returns a '\n'.
> What's wrong with it???
> :(
> 
-- 
Andr?s M.
--------------------------------------------- 


From nagle at animats.com  Mon Mar 19 15:45:58 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 19 Mar 2007 19:45:58 GMT
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <56863eF27p5bmU1@mid.uni-berlin.de>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>
	<56863eF27p5bmU1@mid.uni-berlin.de>
Message-ID: <WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>

Diez B. Roggisch wrote:
> John Nagle schrieb:
> 
>>   I'm looking for something that can read .MDB files, the format
>> Microsoft Access uses, from Python.  I need to do this on
>> Linux, without using Microsoft tools.  I just need to read
>> the files once, so I can load the tables into another database.
>> Speed isn't an issue, and I don't need to access the file in
>> database fashion.  The files are too big to read into RAM all at once,
>> though.
>>
>>   I tried "MDBtools", but the only (last) release was
>> a pre-release three years ago, and I've encountered
>> many build problems trying to make it work on Fedora
>> Core 6.
> 
> 
> I was just gonna suggest it. Under ubuntu, it works easy as cake, and 
> converts the mdb nicely to some CSV-files.
> 
> I think you should really try and make it work.
> 
> Diez

    What MDBtools did you install?  The RPM, a checkout from CVS,
or the downloadable distribution?  They're all different.

				John Nagle


From laurent.pointal at limsi.fr  Wed Mar  7 10:53:43 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 07 Mar 2007 16:53:43 +0100
Subject: Generator expression parenthesis mixed with function call ones
Message-ID: <esmn5q$5ni$1@news2.u-psud.fr>

[Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
on win32]

Given the following:

>>> sum(i for i in range(10))
45
>>> def f(*args) : print args
...
>>> f(i for i in range(10))
(<generator object at 0x00A79788>,)
>>> def f(a,*args) : print a,ar
...
>>> f(4,i for i in range(10))
  File "<stdin>", line 1
SyntaxError: invalid syntax


Why does Python allow generator expression parenthesis to be mixed with
function call parenthesis when there is only one parameter ?

IMHO this should be forbidden, usage must not be different when there is
only one parameter and when there are more parameters.
User should all times explicitly use () for a generator expression and
[] for a list comprehension expression.




From sjdevnull at yahoo.com  Tue Mar 27 14:04:55 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 27 Mar 2007 11:04:55 -0700
Subject: Help in Placing Object in Memory
In-Reply-To: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
References: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
Message-ID: <1175018695.595973.115820@b75g2000hsg.googlegroups.com>

On Mar 27, 10:33 am, "Clement" <jeba.r... at gmail.com> wrote:
> I am newbie to Python...... i want to know something..........
>
> can i place an object in disk instead of placing in Main Memory...?
>
> If possible, can you please explain with some scripts...?
>
> can two python script share a common object....?


POSH allows shared objects, but it's not built-in.  http://poshmodule.sourceforge.net/

If you're only looking for persistence (and not sharing), there's the
(standard) shelve module.  http://docs.python.org/lib/module-shelve.html
If your need to share objects is fairly minimal and not performance-
sensitive, you might be able to get by with shelves, sync, and file
locking or some other locking.



From rkmr.em at gmail.com  Sun Mar 18 12:53:14 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Sun, 18 Mar 2007 09:53:14 -0700
Subject: list comprehension help
In-Reply-To: <pan.2007.03.18.16.44.22.267421@gmx.net>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<mailman.5248.1174235057.32031.python-list@python.org>
	<pan.2007.03.18.16.44.22.267421@gmx.net>
Message-ID: <e04d2e90703180953h4812778ege597590fb87df576@mail.gmail.com>

On 3/18/07, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> In <mailman.5248.1174235057.32031.python-list at python.org>, Daniel Nogradi
> wrote:
>
> >> f = open('file.txt','r')
> >> for line in f:
> >>         db[line.split(' ')[0]] = line.split(' ')[-1]
> >>         db.sync()
> >
> > What is db here? Looks like a dictionary but that doesn't have a sync method.
>
> Shelves (`shelve` module) have this API.  And syncing forces the changes
> to be written to disks, so all caching and buffering of the operating
> system is prevented.  So this may slow down the program considerably.

It is a handle for bsddb

import bsddb
db=bsddb.hashopen('db_filename')
Syncing will defenitely slow down. I will slow that down. But is there
any improvement I can do to the other part the splitting and setting
the key value/pair?
thanks


From gagsl-py2 at yahoo.com.ar  Sun Mar 25 15:28:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 16:28:31 -0300
Subject: problem at installing phyton on windows
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
Message-ID: <op.tpre1tthx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 15:40:14 -0300, gslm <slm_guzel at hotmail.com> escribi?:

> But I'm sorry.I haven't understood what i must do for ruunnig phyton
> command.I delete path from proportiesof my computer.Then i open
> command line of phyton.But when i write phyton these view below:
> Traceback<most recent call last>:
> File "<stdin>"; line 1 in <module>
> NameError: name phyton is not defined
> Sorry may be you think i'm comic but i am not be able to correct.

So, you *already* have started the Python interpreter. You don't have to  
type any more thing to start!
If you see a console like this:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]  
on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>>

you are inside the Python interpreter.
You may use IDLE, an integrated editor+debugger+other things (Start menu,  
All programs, Python, Idle).
Or install the Python for Windows extensions, by Mark Hammond, that comes  
with its own editor (PythonWin) and may be better suited for a Windows  
environment https://sourceforge.net/projects/pywin32/
Try reading some introductory texts. The book "Dive into Python" may be  
useful: www.diveintopython.org
There is a wiki with more resources: http://wiki.python.org/moin/

-- 
Gabriel Genellina



From rpdooling at gmail.com  Fri Mar 16 10:27:21 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 16 Mar 2007 07:27:21 -0700
Subject: Mastering Python
In-Reply-To: <1174052358.486071.163280@e65g2000hsc.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
Message-ID: <1174055241.079644.160750@e1g2000hsg.googlegroups.com>

On Mar 16, 8:39 am, "Paul McGuire" <p... at austin.rr.com> wrote:
>
> Wow, are you still reading?  Quit wasting time and go download a
> Python dist and get started already!
>

I think you should extract that and spend twenty minutes tidying it up
and then publish it to the Python for Programmers page or make it a
downloadable .pdf.

http://wiki.python.org/moin/BeginnersGuide/Programmers

rd

 "The chief contribution of Protestantism to human thought is its
  massive proof that God is a bore."

  --H.L. Mencken



From jzgoda at o2.usun.pl  Fri Mar 23 06:30:59 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 23 Mar 2007 11:30:59 +0100
Subject: how can I invoke a Java code?
In-Reply-To: <1174610940.971724.206900@l75g2000hse.googlegroups.com>
References: <1174610940.971724.206900@l75g2000hse.googlegroups.com>
Message-ID: <eu0aad$mfu$1@atlantis.news.tpi.pl>

momobear napisa?(a):

> A friend of my write a Java program, and I want use it in my python
> program as a module. I searched the topic in Google and find maybe the
> better way is use GCJ to compile it. Is there any other way for me?
> the simple and speediness choice the better. thanks.

If the speed is crucial, I suggest compiling the Java code with GCJ,
then write Python extension module for the Java library. This is how the
Lucene indexing library is ported to Python, see
http://pylucene.osafoundation.org/.

-- 
Jarek Zgoda

"We read Knuth so you don't have to."


From simon at brunningonline.net  Wed Mar 14 05:16:16 2007
From: simon at brunningonline.net (Simon Brunning)
Date: Wed, 14 Mar 2007 09:16:16 +0000
Subject: Setting Up SOAPpy for Python v2.5 on Windows?
In-Reply-To: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
References: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
Message-ID: <8c7f10c60703140216s38c4f7f8lc19db3e6996e68bf@mail.gmail.com>

On 13 Mar 2007 11:53:24 -0700, Steve <sreisscruz at gmail.com> wrote:
> What are the required version of the SOAPpy, PyXML, fpconst that are
> needed to run under the Python 2.5 environment on Windows?

SOAPpy doesn't install under Python 2.5 as-is. You'll need to add
source code encodings on all the source files in all the files before
setup.py will run. (See PEP 263.).

You can get fpconst 0.7.2 from the cheese shop, and PyXML from
Sourceforge. I believe the latest versions of these packages work
fine.

Do be aware, though, that SOAPpy is unmaintained, so you might want to
look at other SOAP handling packages like ZSI or elementsoap. Unless,
that is, you need functionality that only SOAPpy provides, in which
case you are stuck with it.

-- 
Cheers,
Simon B
simon at brunningonline.net
http://www.brunningonline.net/simon/blog/
GTalk: simon.brunning
MSN: small_values


From bbxx789_05ss at yahoo.com  Wed Mar 28 12:15:08 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 28 Mar 2007 09:15:08 -0700
Subject: Why doesnt __getattr__ with decorator dont call __get_method in
	decorator
In-Reply-To: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>
References: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>
Message-ID: <1175098508.305350.34000@r56g2000hsd.googlegroups.com>

On Mar 28, 8:28 am, "glomde" <tbr... at yahoo.com> wrote:
> Hi,
>
> I tried to write a decorator for that should be for methods but for
> some reasons
> it doens seem to work when you try to do it on the __getattr__ method
> in a class.
> Could anybody give some hints why this is?
>

All you have to do is decorator should methods write be for reason it
works with class __getattr__ in!



From edurand.com at gmail.com  Tue Mar  6 03:50:10 2007
From: edurand.com at gmail.com (edurand)
Date: 6 Mar 2007 00:50:10 -0800
Subject: image processing
Message-ID: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>

Hi,

We are are pleased to announce the version 3.0 of the image processing
library 'Filters'.
You can use it in Python, and we have provided tutorials and samples
in Python, with for exemple conversion from/to PIL image format.

Have a look at : http://filters.sourceforge.net/

it's open source of course

regards
edurand



From gagsl-py2 at yahoo.com.ar  Tue Mar 20 22:10:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 23:10:03 -0300
Subject: select.poll and winXP
References: <d60Mh.184321$1E3.122656@fe3.news.blueyonder.co.uk>
Message-ID: <op.tpioa1f7x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 22:44:41 -0300, John Pote <johnpote at blueyonder.co.uk>  
escribi?:

> I have the standard Python 2.4.4 windows download installed on my win XP
> box. But the poll class in module select is not available. The docs  
> indicate
> that it can work with windows as long as only sockets are used which is  
> fine
> for me.

On Windows you only have select.select

> Is there a reason it's not in the standard build, can I use it if I re
> compile the 'select' module from the source?

poll() is not implemented on Windows so unless you write a replacement,  
you won't gain anything just by recompiling.

-- 
Gabriel Genellina



From jwkenne at attglobal.net  Fri Mar 23 14:24:17 2007
From: jwkenne at attglobal.net (John W. Kennedy)
Date: Fri, 23 Mar 2007 14:24:17 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <Na-dnQjjNblIU57bnZ2dnUVZ_vKunZ2d@comcast.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnfxDTKdi5J_bnZ2dnUVZ_uzinZ2d@comcast.com>
	<m2slbxbg57.fsf@local.wv-www.com>
	<Na-dnQjjNblIU57bnZ2dnUVZ_vKunZ2d@comcast.com>
Message-ID: <rXUMh.12$ha4.10@newsfe12.lga>

Lew wrote:
> But if Xah were being trollish, why didn't they jump on my response and 
> call me names?

I'm not sure he's a proper troll. Unfortunately, he seems to be the kind 
of person who thinks that reading "Java for Dummies" makes one a 
self-sufficient expert on Java and philosopher of programming languages 
to boot, and who is very eager to bestow upon the world all his 
brilliant insights.

At least, that explanation is consistent with his historic behavior.

-- 
John W. Kennedy
"Only an idiot fights a war on two fronts.  Only the heir to the throne 
of the kingdom of idiots would fight a war on twelve fronts"
  -- J. Michael Straczynski.  "Babylon 5", "Ceremonies of Light and Dark"
* TagZilla 0.066 * http://tagzilla.mozdev.org


From rridge at caffeine.csclub.uwaterloo.ca  Wed Mar 21 01:04:30 2007
From: rridge at caffeine.csclub.uwaterloo.ca (Ross Ridge)
Date: Wed, 21 Mar 2007 01:04:30 -0400
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
Message-ID: <etqecu$kl5$1@rumours.uwaterloo.ca>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>You can get the file descriptor from the Python file object using its  
>fileno() method. The file descriptor lives at the OS level, so it's safe  
>to pass around.

Not under Windows.  Windows doesn't have Unix-like descriptors, so the
C runtime emulates them.

					Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge at csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //	  


From psdasilvaX at esotericaX.ptX  Thu Mar  8 17:24:42 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Thu, 08 Mar 2007 22:24:42 +0000
Subject: Where to "import"?
In-Reply-To: <1173379952.901004@iceman.esoterica.pt>
References: <1173379952.901004@iceman.esoterica.pt>
Message-ID: <1173392680.695745@iceman.esoterica.pt>

Paulo da Silva escreveu:


This is to thank all the answers I got so far.
Now I understand perfectly how "import" works.

Regards.
Paulo


From scott.daniels at acm.org  Sat Mar 17 18:43:53 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sat, 17 Mar 2007 14:43:53 -0800
Subject: class question
In-Reply-To: <mailman.5231.1174162549.32031.python-list@python.org>
References: <mailman.16977.1174059603.32030.python-list@python.org>
	<mailman.5231.1174162549.32031.python-list@python.org>
Message-ID: <12vorng6q3odn68@corp.supernews.com>

sittner at lkb.ens.fr wrote:
> Hello there,
> i am pretty new to object-oriented programming and i have a question:
> let's say i have a simple class such as:
> class father:
>      age=...
>      name=....
>      def abcd.....
>      class son(father):
>             age=....
>             name=....
>             def efgh:
> or any other heirarchic structure of class and subclasses.
> i would like to list or print the data content of a given instance of the
> subclass, all the way up (e.g. if sam is jack's son, so i would like to
> get their names and ages and use the class as a data structure for that
> matter).

You misunderstand Python's classes.  There is little, if any advantage
to defining a class inside another class.

How about:
     import weakref  # to keep everyone from being immortal.

     class Person(object):
         def __init__(self, age, name, dad=None, mom=None):
             self.name = name
             self.age = age
             self.dad = dad
             self.mom = mom
             self._kids = weakref.WeakValueDictionary()
             if dad is not None:
                 dad.add_kid(self)
             if mom is not None:
                 mom.add_kid(self)

         def children(self):
             return self._kids.values()

         def add_kid(self, child):
             assert self.age > child.age
             self._kids[id(child)] = child

         def __repr__(self):
	    return '%s(%s)' % (self.name, self.age)

     guy = Person(age=28, name='George')
     gal = Person(age=31, name='Martha')
     kid = Person(age=1, name='Ellen', dad=guy, mom=gal)
     print '%s of %s and %s.' % (kid, kid.dad, kid.mom)
     print "%s's kids: %s." % (guy, guy.children())
     print "%s's kids: %s." % (gal, gal.children())

--Scott David Daniels
scott.daniels at acm.org


From aspineux at gmail.com  Sat Mar 31 19:07:56 2007
From: aspineux at gmail.com (aspineux)
Date: 31 Mar 2007 16:07:56 -0700
Subject: saving Python process state for later debugging
In-Reply-To: <1175352493.387046.32510@q75g2000hsh.googlegroups.com>
References: <1175352493.387046.32510@q75g2000hsh.googlegroups.com>
Message-ID: <1175382476.172386.97370@q75g2000hsh.googlegroups.com>

On 31 mar, 16:48, yossi.krei... at gmail.com wrote:
> Hi!
>
> Is there a way to save the state of a Python process for later
> inspection with a debugger? One way to do this is to dump core, but is
> the result usable for debugging with pdb (it can be debugged by gdb,
> which can inspect PyObjects in a CPython core, for example, but it's
> not much fun)?
>
> If there is no way to do this today, are there essential difficulties
> in implementing this on top of an OS support for "raw" core dumps?

Pylon has something like that.
http://pylonshq.com/docs/0.9.4.1/interactive_debugger.html

Turbogears has the same with option tg.fancy_exception

You can navigate into the stack trace from the web interface :-)



>
> TIA,
> Yossi




From eric_brunel at despammed.com  Fri Mar  2 03:34:08 2007
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 02 Mar 2007 09:34:08 +0100
Subject: New to Tkinter GUI building
References: <1172695675.279652.98920@a75g2000cwd.googlegroups.com>
	<CfmFh.6986$_73.1105@newsread2.news.pas.earthlink.net>
	<1172701393.612661.193690@m58g2000cwm.googlegroups.com>
	<oXDFh.7737$tD2.2742@newsread1.news.pas.earthlink.net>
	<1172779300.546330.140120@h3g2000cwc.googlegroups.com>
Message-ID: <op.tojze6nkrqur0o@eb.pragmadev>

On Thu, 01 Mar 2007 21:01:40 +0100, Adam <adamgarstang at googlemail.com>  
wrote:

> Ok the window has resized but the elements inside are still like they
> were, so they are going off the edge on the window. How can I get
> these to resize? I have put sizes on the frames they are in. Sorry to
> keep asking but I'm flying blind here, I have checked the python site
> and the intro to tkinter which are both usually good for this kinda
> thing.

[snip code]

I've not tried your code, but it seems to be missing some grid  
configuration. Basically, you need to tell all containers what row(s) or  
column(s) will grow or shrink when the container itself grows or shrink.  
This is done by calling the grid_rowconfigure and grid_columnconfigure  
methods on the container, passing the weight option:
container.grid_rowconfigure(0, weight=1)
means that when the container size changes, all rows will (try to) stay  
the same, except row number 0 which will adapt its size to the new  
container size. (This is actually a bit more complicated than that, but it  
should suit your needs for the moment).

Since the default weight for all rows and columns is 0, meaning "don't  
change your size", the behavior you see is quite normal.

A little tip: things are usually a bit more complicated when you have  
several levels of frames within each other. Specifying a "flashy"  
background color for frames can help you to figure out which one does  
change its size as you want. Use bg='red' or bg='green' in your Frame  
creations to make obvious where they are; you'll see far clearly what  
happens when you resize your window.

A few short notes:
- You don't need at all to put all your widgets in attributes. Unless  
you'll have to access the widget itself later (e.g to change it state or  
color, or whatever), putting it in a local variable is fine.
- In your code, it appears to me that self.mainWindow is not needed. The  
Tk instance (self.top) *is* the top-level window and is a valid container  
for whatever widgets you need. Having a Frame inside it will only cause  
layout problems. I'd do:
   self.mainWindow = tk.Tk()
   self.mainWindow.geometry('700x400+0+0')
   self.labAll = tk.Label(self.mainWindow, text="All Files/Folders:")
   ...

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From skip at pobox.com  Fri Mar  9 18:50:16 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 9 Mar 2007 17:50:16 -0600
Subject: pylint: don't warn about tabs
In-Reply-To: <G1mIh.25$qe5.19@trnddc05>
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4813.1173388535.32031.python-list@python.org>
	<G1mIh.25$qe5.19@trnddc05>
Message-ID: <17905.62136.568915.200180@montanaro.dyndns.org>


    Alan> "Ben Finney" <bignose+hates-spam at benfinney.id.au> wrote in message
    Alan> news:mailman.4813.1173388535.32031.python-list at python.org...
    >> Sticking to spaces for indentation avoids the ambiguity of
    >> interpretation that ASCII TAB characters are subject to.

    Alan> What ambiguity?
    Alan> Tabs are *less* ambiguous.
    Alan> One tab character is one level of indentation.
    Alan> I have never seen this violated.

The ambiguity comes when eventually your source is edited by someone else.
Perhaps you have the discipline to use only spaces or only tabs, but the guy
in the next cubicle is as likely to use spaces as you are to use tabs.  Once
he edits a file the two of you share, you're toast.

This is not a new topic.  After a lot of discussion over the years the
general consensus in the Python community is that spaces are the only way to
go.  Here are some references:

    http://www.python.org/dev/peps/pep-0666/
    http://mail.python.org/pipermail/python-list/2003-January/183758.html
    http://wiki.w4py.org/spaces-not-tabs.html

The Python distribution even comes with two scripts, tabnanny and reindent,
which were developed to detect and eliminate the ambiguity caused by mixing
spaces and tabs.  The beginning of the reindent doc string reads:

    Change Python (.py) files to use 4-space indents and no hard tab
    characters.  Also trim excess spaces and tabs from ends of lines, and
    remove empty lines at the end of files.  Also ensure the last line ends
    with a newline.

If only tabs were considered to be a viable alternative to only spaces,
reindent would almost certainly have grown a flag by now to allow that.

The tag line for tabnanny reads:

    The Tab Nanny despises ambiguous indentation.  She knows no mercy.

Finally, note this from PEP 666:

    The problem is that there is no polite way to say 'Stop wasting your
    valuable time and mine.'

That's as politely as I can put it.

Skip


From MonkeeSage at gmail.com  Fri Mar  2 19:27:47 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 2 Mar 2007 16:27:47 -0800
Subject: Sort with extra variables
In-Reply-To: <pan.2007.03.02.23.51.54@gmail.com>
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de>
	<pan.2007.03.02.23.12.08@gmail.com>
	<1172877633.676612.141450@31g2000cwt.googlegroups.com>
	<pan.2007.03.02.23.51.54@gmail.com>
Message-ID: <1172881667.825628.93490@t69g2000cwt.googlegroups.com>

On Mar 2, 5:51 pm, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> I guess the thing is that I'd have to create a new callable no matter
> how, as it is the only way to bring the extra variables into the getValue
> function when called by sort.

Yes, but you don't have to create it every time you call sortMoves...

def sortKey(move):
    return getMoveValue(board, table, ply, move)

def sortMoves(board, table, ply, moves):
    moves.sort(key=sortKey, reverse=True)
    return moves

Regards,
Jordan



From irstas at gmail.com  Sat Mar 24 10:21:21 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 24 Mar 2007 07:21:21 -0700
Subject: Idiom for running compiled python scripts?
In-Reply-To: <pan.2007.03.23.07.30.56@mailinator.com>
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
Message-ID: <1174746081.436526.64360@l75g2000hse.googlegroups.com>

On Mar 23, 9:30 am, Mark <markb... at mailinator.com> wrote:
> A small script called "python_compile_and_run" in "pseudo" code:
>
> #!/usr/bin/env python
> import sys
>
> # Following is invalid syntax unfortunately :(
> from sys.argv[1].rstrip('.py') import main
>
> sys.argv = sys.argv[1:]
> if __name__ == "__main__":
>     main()
>
> so I could just do a "python_compile_and_run myscript.py" and it would
> do what I want, i.e. run myscript.pyc if available and valid, generate
> and run it if necessary.

There's __import__ which allows you to do what you tried:

m = __import__(sys.argv[1].rstrip('.py'))

Also, rstrip doesn't work like you think it does.
'pyxyypp.py'.rstrip('.py') == 'pyx'

Answering also to your later message:

> So the general purpose invoking bash script e.g. "runpy" is merely something
like:

Curiously enough, Python 2.5 has a module called runpy:
http://docs.python.org/lib/module-runpy.html

which seems to almost do what you want. It doesn't compile the modules
but you could make a modification which does. The benefit over just
using __import__("module").main() would be
that your scripts wouldn't necessarily need a function called "main",
but would still work with scripts that use the __name__ == '__main__'
idiom.
A simple implementation that "works":


import imp, sys, os
c = sys.argv[1]
if not os.path.exists(c + 'c') or os.stat(c).st_mtime > os.stat(c +
'c').st_mtime:
    import compiler
    compiler.compileFile(c)
del sys.argv[0]
imp.load_compiled('__main__', c + 'c')


I timed it against running plain .py and running .pyc directly.
It seemed to be roughly on par with running .pyc directly, and about
18ms
faster than running .py. The file had 600 lines (21kb) of code.



From nobody at invalid.com  Tue Mar 13 20:28:08 2007
From: nobody at invalid.com (Erik Johnson)
Date: Tue, 13 Mar 2007 18:28:08 -0600
Subject: Tools for GUI/graphics
References: <1173810046.6562@jubilee.claranet.pt>
	<C46dnbe3w4N9bmvYnZ2dnUVZ_u7inZ2d@comcast.com>
Message-ID: <45f741ad$1@nntp.zianet.com>


> You can use ReportLab Graphics to generate the
> graphs as .JPG files and display them in a
> browser window with simple HTML.

    That is one option. As best as I recall, CherryPy is a simple but fully
functional web framework. If your primary focus is programmatically
generating graphs from data, some other options may be:

Go ahead and use Tkinter's Canvas (I foget exactly how, but you can export
graphic files).

Do a similar thing with wxPython (www.wxpython.org)

Use Frekrik Lundh's Python Image Library (PIL) -
(http://www.pythonware.com/products/pil/)

Chart Director is a product I have a little experience with which has Python
bindings (http://www.advsofteng.com/). Technically a commercial product
(~$100), it has a very liberal demo policy: demo versions display a small
banner at the bottom of the graphic. This is a fairly professional looking
package that can do nice stuff like automatically scales axes, get them
labelled with ticks, etc. It may be worth you time to use something like
that.


Searching the Python Cheese Shop for Scientific/Engineering Visualization
turns up a good deal of others:
http://www.python.org/pypi?:action=browse&show=all&c=399&c=385

HTH,
-ej




From psdasilvaX at esotericaX.ptX  Thu Mar 15 00:33:01 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Thu, 15 Mar 2007 04:33:01 +0000
Subject: Returning other instance from __init__
Message-ID: <1173933158.948806@jubilee.claranet.pt>

I would like to implement something like this:

class C1:
	def __init__(self,xxx):
		if ... :
			self.foo = foo
			self.bar = bar
		else:
			self=C1.load(xxx)

	def load(xxx):
		...
		return instance_of_C1
	load=staticmethod(load)

This does not seem correct. How can I do it?

Thanks for any help
Paulo


From deets at nospam.web.de  Wed Mar 28 19:12:45 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 29 Mar 2007 01:12:45 +0200
Subject: XML/encoding/prolog/python hell...
In-Reply-To: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
References: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
Message-ID: <570b3oF2b2uk9U1@mid.uni-berlin.de>

fscked schrieb:
> I am a beginning pythoner and I am having a terrible time trying to
> figure out how to do something that (it would seeme to me) should be
> fairly simple.

Show us code. As concise as possible. Then we might be able to help you.

Diez


From john.pye at gmail.com  Fri Mar 23 09:07:30 2007
From: john.pye at gmail.com (John Pye)
Date: 23 Mar 2007 06:07:30 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5506.1174639747.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
	<mailman.5496.1174624444.32031.python-list@python.org>
	<1174625242.761663.235320@e1g2000hsg.googlegroups.com>
	<mailman.5506.1174639747.32031.python-list@python.org>
Message-ID: <1174655250.614164.279240@l77g2000hsb.googlegroups.com>

On Mar 23, 7:48 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
>
> And replace all places where a Python file goes into a C extension, with
> exportable_file(f)

What about calling mscvrt_get_osfhandle from inside the SWIG wrapper?
I tried this but it seemed that the function was not exported to the
DLL.

Cheers
JP



From paul at boddie.org.uk  Mon Mar  5 05:39:54 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 5 Mar 2007 02:39:54 -0800
Subject: How use XML parsing tools on this one specific URL?
In-Reply-To: <NikitaTheSpider-9BE3EE.14214204032007@news-server.nc.rr.com>
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
	<NikitaTheSpider-9BE3EE.14214204032007@news-server.nc.rr.com>
Message-ID: <1173091194.380060.66500@q40g2000cwq.googlegroups.com>

On 4 Mar, 20:21, Nikita the Spider <NikitaTheSpi... at gmail.com> wrote:
> In article <1173030156.276363.174... at i80g2000cwc.googlegroups.com>,
>
> > I can't validate it and xml.minidom.dom.parseString won't work on it.

[...]

> Valid XHTML is scarcer than hen's teeth.

It probably doesn't need to be valid: being well-formed would be
sufficient for the operation of an XML parser, and for many
applications it'd be sufficient to consider the content as vanilla XML
without the XHTML overtones.

Paul



From __peter__ at web.de  Mon Mar  5 03:55:27 2007
From: __peter__ at web.de (Peter Otten)
Date: Mon, 05 Mar 2007 09:55:27 +0100
Subject: Building a dictionary from a tuple of variable length
References: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>
Message-ID: <esglqu$api$00$1@news.t-online.com>

bg_ie at yahoo.com wrote:

> I have the following tuple -
> 
> t = ("one","two")
> 
> And I can build a dictionary from it as follows -
> 
> d = dict(zip(t,(False,False)))
> 
> But what if my tuple was -
> 
> t = ("one","two","three")
> 
> then I'd have to use -
> 
> d = dict(zip(t,(False,False,False)))
> 
> Therefore, how do I build the tuple of Falses to reflect the length of
> my t tuple?

For dictionaries there is a special method:

>>> dict.fromkeys(("one", "two", "three"), False)
{'three': False, 'two': False, 'one': False}

When you are just interested in the list of tuples, use repeat():

>>> from itertools import repeat
>>> zip("abc", repeat(False))
[('a', False), ('b', False), ('c', False)]

Peter


From lbates at websafe.com  Tue Mar 27 17:17:22 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 27 Mar 2007 16:17:22 -0500
Subject: Auto execute python in USB flash disk
In-Reply-To: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
Message-ID: <-bOdnSzyH4JAFJTbnZ2dnUVZ_sWdnZ2d@comcast.com>

Brian Erhard wrote:
> I am still fairly new to python and wanted to attempt a home made
> password protection program.  There are files that I carry on a USB
> flash drive that I would like to password protect.  Essentially, I
> would like to password protect an entire directory of files.  Is there
> a way to auto execute a python script after a user double clicks to
> open a folder on the USB drive? How can you capture that double click
> event on a specific folder?
> 
> Thanks.
> 
Unless you are just doing this to learn, I would suggest you purchase
USB key with encryption included.  They are REALLY cheap.

http://www.kingston.com/flash/DataTravelers_enterprise.asp

-Larry


From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 11 00:26:15 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 11 Mar 2007 16:26:15 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<1173575978.699090.313770@64g2000cwx.googlegroups.com>
Message-ID: <pan.2007.03.11.05.26.15.551707@REMOVE.THIS.cybersource.com.au>

On Sat, 10 Mar 2007 17:19:38 -0800, MonkeeSage wrote:

> On Mar 10, 6:47 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>> The fencepost method still seems to be simplest:
>>
>>     t = sorted(random.sample(xrange(1,50), 4))
>>     print [(j-i) for i,j in zip([0]+t, t+[50])]
> 
> Simpler, true, but I don't think it gives any better distribution...

[snip]

> Granted, I'm just eyeballing it, but they look fairly equal in terms
> of distribution.

It's easy enough to see whether the fencepost method gives a uniform
distribution.


def fence(n, m):
    t = [0] + sorted(random.sample(xrange(1, m), n-1)) + [m]
    L = [(j-i) for i,j in zip(t[:-1], t[1:])]
    assert sum(L) == m
    assert len(L) == n
    return L


def collate(count, n, m):
    bins = {}
    for _ in xrange(count):
        L = fence(n, m)
        for x in L:
            bins[x] = 1 + bins.get(x, 0)
    return bins


collate(1000, 10, 80)

gives me the following sample:

{1: 1148, 2: 1070, 3: 869, 4: 822, 5: 712, 
6: 633, 7: 589, 8: 514, 9: 471, 
10: 406, 11: 335, 12: 305, 13: 308, 14: 242, 
15: 232, 16: 190, 17: 172, 18: 132, 19: 132, 
20: 124, 21: 87, 22: 91, 23: 72, 24: 50, 
25: 48, 26: 45, 27: 33, 28: 29, 29: 22, 
30: 19, 31: 20, 32: 12, 33: 12, 34: 11, 
35: 11, 36: 5, 37: 9, 38: 2, 39: 4, 40: 5, 
42: 1, 43: 3, 45: 2, 49: 1}

Clearly the distribution isn't remotely close to uniform.

To compare to the "cheat" method, calculate the mean and standard
deviation of this sample, and compare to those from the other method.
(Code left as an exercise for the reader.) When I do that, I get a mean
and standard deviation of 8 and 6.74 for the fencepost method, and 8 and
4.5 for the "cheat" method. That implies they are different distributions.



-- 
Steven.



From duncan.booth at invalid.invalid  Sat Mar 10 13:34:38 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 10 Mar 2007 18:34:38 GMT
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<Xns98EFB589C63E9duncanbooth@127.0.0.1>
	<1173550883.899624.88730@c51g2000cwc.googlegroups.com>
Message-ID: <Xns98EFBD0029648duncanbooth@127.0.0.1>

"Dan Bishop" <danb_83 at yahoo.com> wrote:

> On Mar 10, 11:50 am, Duncan Booth <duncan.bo... at invalid.invalid>
> wrote:
>> "Jack" <nos... at invalid.com> wrote:
>> > This is a naive question:
>>
>> > "%u" % -3
>>
>> > I expect it to print 3. But it still print -3.
>>
>> Internally it uses the C runtime to format the number, but if the
>> number you ask it to print unsigned is negative it uses %d instead of
>> %u. I have no idea if it is actually possibly to get a different
>> output for %d versus %u.
> 
> %u used to be different from %d, but it changed because of the int/
> long unification in Python 2.4.
> 
Yes, I guessed that was it.

The implementation is identical when the value is negative but still 
different when the integer is non-negative which is why I questioned 
whether it was actually possible to get different output. If not perhaps 
both the implementation and the documentation should be simplified.


From exarkun at divmod.com  Mon Mar 26 11:06:30 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 26 Mar 2007 10:06:30 -0500
Subject: Sending ECHO_REQUEST (pinging) with python
In-Reply-To: <pan.2007.03.26.14.50.50@gmail.com>
Message-ID: <20070326150630.18920.1682070509.divmod.quotient.5673@ohm>

On Mon, 26 Mar 2007 16:50:33 +0200, Thomas Dybdahl Ahle <lobais at gmail.com> wrote:
>Den Mon, 26 Mar 2007 06:30:04 -0500 skrev Nick Craig-Wood:
>
>> Michael Bentley <michael at jedimindworks.com> wrote:
>>>  On Mar 26, 2007, at 1:30 AM, Thomas Dybdahl Ahle wrote:
>>> > It seems however that I have to be root to send those imcp packages,
>>> > but I guess there must be a workaround since I can easily use the
>>> > "ping" command as ordinary user.
>>>
>>>  The workaround your ping command is using btw, is probably running
>>>  suid root.
>>
>> Under linux the only priviledge you need is CAP_NET_RAW.  It is possible
>> to give this to a process - a bit of searching with google will show you
>> how!
>
>How, I did google, but I wasn't able to find any way to do this in
>python..

You need a sendmsg wrapper (there are several, none in the stdlib), then
you need a privileged process which is willing to give you the privilege.

It's pretty inconvenient.

Jean-Paul



From bbxx789_05ss at yahoo.com  Sat Mar 24 23:40:13 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 20:40:13 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <mailman.5571.1174789089.32031.python-list@python.org>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5571.1174789089.32031.python-list@python.org>
Message-ID: <1174794013.752495.42220@o5g2000hsb.googlegroups.com>

On Mar 24, 8:18 pm, Michael Bentley <mich... at jedimindworks.com> wrote:
> On Mar 24, 2007, at 12:30 PM, Robert Hicks wrote:
>
> > I want to upgrade to 2.5 but I don't see any unistall instructions
> > anywhere.
>
> Don't uninstall it.
>
> That's why Apple put python under /Library/Frameworks/
> Python.framework/Versions.  So you can have multiple versions installed.
>

/Libary/Frameworks/ is an empty directory(except for . and ..) on my
Mac, and I have 2.3.5 installed somewhere.



From aleax at mac.com  Tue Mar 20 02:28:54 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 19 Mar 2007 23:28:54 -0700
Subject: Still the __new__ hell ...
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
	<1174337519.926611@jubilee.claranet.pt>
	<568s5gF287c68U2@mid.individual.net>
	<mailman.5315.1174359956.32031.python-list@python.org>
Message-ID: <1hv8x6v.1x0ceur1nnwi46N%aleax@mac.com>

Steve Holden <steve at holdenweb.com> wrote:

> greg wrote:
> > Paulo da Silva wrote:
> >> As a relatively inexperient
> >> in python, how could I know that a 'string' is an instance of
> >> basestring?
> > 
> >    isinstance(x, basestring)
> > 
> > This works because basestring is defined as the
> > tuple (str, unicode) and isinstance accepts a
> > tuple of types as well as just a single type.
> > 
> The idea is right, but the detail is completely wrong.
> 
> basestring is a *type*.
> 
>   >>> basestring
> <type 'basestring'>
> 
> It's the base class of which both str and unicode are subclasses.

I believe it used to be a tuple back in Python 2.2 (sorry, don't have a
Python 2.2 installation to check this right now).


Alex


From duncan.booth at invalid.invalid  Thu Mar 29 04:08:11 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 Mar 2007 08:08:11 GMT
Subject: BeautifulSoup vs. Microsoft
References: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
Message-ID: <Xns99025B6FD25CFduncanbooth@127.0.0.1>

John Nagle <nagle at animats.com> wrote:

> Strictly speaking, it's Microsoft's fault.
> 
>      title="<!--http://www.microsoft.com/usability/information.mspx->"
> 
> is supposed to be an HTML comment.  But it's improperly terminated.
> It should end with "-->".  So all that following stuff is from what
> follows the next "-->" which terminates a comment.

It is an attribute value, and unescaped angle brackets are valid in 
attributes. It looks to me like a bug in BeautifulSoup.


From stargaming at gmail.com  Wed Mar 14 13:36:03 2007
From: stargaming at gmail.com (Stargaming)
Date: Wed, 14 Mar 2007 18:36:03 +0100
Subject: print and softspace in python
In-Reply-To: <1173888776.475236.81720@d57g2000hsg.googlegroups.com>
References: <1173888776.475236.81720@d57g2000hsg.googlegroups.com>
Message-ID: <et9bq6$295v$1@ulysses.news.tiscali.de>

Phoe6 schrieb:
> print and softspace in python
> In python, whenever you use >>>print statement it will append a
> newline by default. If you don't want newline to be appended, you got
> use a comma at the end (>>>print 10,)
> When, you have a list of characters and want them to be printed
> together a string using a for loop, there was observation that no
> matter what there was space coming between the characters. No split
> or  join methods helped.

Huh?
 >>> x = ['h', 'i', '!']
 >>> print ''.join(x)
hi!

I don't see any problem there. In the most cases you could also build up 
a string accumulatedly.


>>>>list1=['a','b','c']
>>>>for e in list1:
> 
>            print e,
> a b c
> 
>>>># Without whitespace it will look like.
>>>>print "abc"
> 
> abc
> 
> The language reference says that print is designed to output a space
> before any object. And some search goes to find and that is controlled
> by softspace attribute of sys.stdout.
> Way to print without leading space is using sys.stdout.write()
> 
"Note: This attribute is not used to control the print statement, but to 
allow the implementation of print to keep track of its internal state."""
> 
>>>>import sys
>>>>for e in list1:
> 
>           sys.stdout.write(e)
> abc
> 
> Reference manual says:
> A space is written before each object is (converted and) written,
> unless the output system believes it is positioned at the beginning of
> a line. This is the case (1) when no characters have yet been written
> to standard output, (2) when the last character written to standard
> output is "\n", or (3) when the last write operation on standard
> output was not a print statement. (In some cases it may be functional
> to write an empty string to standard output for this reason.)
> 
> Question to c.l.p
> Am Not getting the last part as how you will write  a empty string and
> use print  not appending  blank space in a single line. 
I'd guess they think about print "",;print "moo" (print a blank string, 
do not skip line, print another one) to preserve the "softspace". As far 
as I get your problem, you don't really have to think about it.
> Am not getting
> the (In some cases... ) part of the reference manual section. Please
> help.
> 

Use the join-idiom correctly.

HTH,
Stargaming


From lbates at websafe.com  Wed Mar 28 18:48:46 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 28 Mar 2007 17:48:46 -0500
Subject: how can I clear a dictionary in python
In-Reply-To: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
Message-ID: <4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>

Marko.Cain.23 at gmail.com wrote:
> Hi,
> 
> I create a dictionary like this
> myDict = {}
> 
> and I add entry like this:
> myDict['a'] = 1
> but how can I empty the whole dictionary?
> 
> Thank you.
> 

just point myDict to an empty dictionary again

myDict={}

Larry Bates



From python at rcn.com  Wed Mar 14 05:39:22 2007
From: python at rcn.com (Raymond Hettinger)
Date: 14 Mar 2007 02:39:22 -0700
Subject: number generator
In-Reply-To: <1hut8e8.g1jy3a1hj5hobN%aleax@mac.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<et1hjq$okj$1@tdi.cu.mi.it> <1hut8e8.g1jy3a1hj5hobN%aleax@mac.com>
Message-ID: <1173865162.313406.245740@b75g2000hsg.googlegroups.com>

[Alex Martelli]
>   map([random.randrange(5) for i in xrange(45)].count, xrange(5))
>
> i.e., this gives 5 integers (each between 0 and 45 included) summing to
> 45 -- add 1 to each of them to get the desired result.

This is a really nice approach.  Besides being fast, it is not too
hard to see that it is correct.

FWIW, here's a variant with a count using the new defaultdict:

n, m = 5, 45
bag = collections.defaultdict(int)
for i in xrange(m):
    bag[random.randrange(n)] += 1
ans = [bag[k] for k in range(n)]



From michele.simionato at gmail.com  Thu Mar  8 03:37:39 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 8 Mar 2007 00:37:39 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
Message-ID: <1173343058.897596.19570@s48g2000cws.googlegroups.com>

Raymond Hettinger wrote:
> Any trick in the book (metaclasses, descriptors, etc) is fair game.

So you are asking for a serious hack, right?

As soon as I saw your challenge I thought "That's difficult. Very
difficult.
No way I can solve that with a simple descriptor/decorator. I need
more POWER.
Time to look at the byteplay module".

The byteplay module by Noam Raphael (http://byteplay.googlecode.com/
svn/trunk/byteplay.py) seems to exist just to make possible
spectacular hacks. So I took
your challenge as an opportunity to explore a bit its secrets. In
doing so,
I have also decided to break the rules and not to solve your problem,
but
a different one, which is the one I am more interested in ;)

Basically, I am happy with the double underscores, but I am unhappy
with
the fact that a method does not know the class where it is defined, so
that you have to repeat the name of the class in ``super``.

With some bytecode + metaclass hackery it is possible to make the
methods
smart enough to recognize the class where they are defined, so your
example could be solved as follows:

from currentclass import CurrentClassEnabled

class A(CurrentClassEnabled):
    def m(self):
        print 'A.m'
    def am(self):
        CurrentClass.m(self) # the same as A.m(self)

class B(A):
    def m(self):
        print 'B.m'
    def bm(self):
        CurrentClass.m(self) # the same as B.m(self)
    def superm(self):
        super(CurrentClass, self).m() # the same as super(B, self).m()

m = B()
m.am()     # prints 'A.m'
m.bm()     # prints 'B.m'
m.superm() # prints 'A.m'

As you see, as a byproduct, double underscores are not needed anymore,
since methods are called directly from the CurrentClass. The approach
also works for ordinary attributes which are not methods.

The code to enable recognition of CurrentClass is short enough to be
includede here, but I will qualify it as a five star-level hackery:

$ cat currentclass.py
# requires byteplay by Noam Raphael
# see http://byteplay.googlecode.com/svn/trunk/byteplay.py
from types import FunctionType
from byteplay import Code, LOAD_GLOBAL, STORE_FAST, LOAD_FAST

def addlocalvar(f, locname, globname):
    if locname not in f.func_code.co_names:
        return f # do nothing
    c = Code.from_code(f.func_code)
    c.code[1:1] = [(LOAD_GLOBAL, globname), (STORE_FAST, locname)]
    for i, (opcode, value) in enumerate(c.code[2:]):
        if opcode == LOAD_GLOBAL and value == locname:
            c.code[i+2] = (LOAD_FAST, locname)
    f.func_code = c.to_code()
    return f

class _CurrentClassEnabled(type):
    def __new__(mcl, name, bases, dic):
        for n, v in dic.iteritems():
            if isinstance(v, FunctionType):
                dic[n] = addlocalvar(v, 'CurrentClass', name)
        return super(_CurrentClassEnabled, mcl).__new__(mcl, name,
bases, dic)

class CurrentClassEnabled:
    __metaclass__ = _CurrentClassEnabled


Enjoy!

                  Michele Simionato



From scott.daniels at acm.org  Sun Mar 11 15:12:27 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Sun, 11 Mar 2007 11:12:27 -0800
Subject: Signed zeros: is this a bug?
In-Reply-To: <1hut4yc.o9f1kta318hnN%aleax@mac.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
Message-ID: <12v8l32sj5ka070@corp.supernews.com>

Alex Martelli wrote:
> Alas, here is the problem...: 0.0 and -0.0 are NOT separate as dict
> keys!  They are == to each other.  So are 0, 0L, and 0+j0, but the
> compiler smartly distinguishes these cases by using (obj, type) as the
> key (the *types* are distinguished, even though the *values*) are; this
> doesn't help with 0.0 and -0.0 since both have type float....
> If you know the proper way to test for -0.0 in portable C code (or some
> feature macro to use in a #if to protect nonportable code) ....

Perhaps you could add a type "NegativeFloat" -- a subtype of float,
and distinguish negative zero from zero that way.  Not saying I know how
in portable C, but ....

--Scott David Daniels
scott.daniels at acm.org


From bj_666 at gmx.net  Tue Mar 27 03:34:24 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 27 Mar 2007 09:34:24 +0200
Subject: shutil.copy Problem
References: <mailman.5648.1174965082.32031.python-list@python.org>
Message-ID: <pan.2007.03.27.07.34.23.779487@gmx.net>

In <mailman.5648.1174965082.32031.python-list at python.org>, David Nicolson
wrote:

> Hi,
> 
> I wasn't exactly sure where to send this, I don't know if it is a bug  
> in Python or not. This is rare, but it has occurred a few times and  
> seems to be reproducible for those who experience it.
> 
> Examine this code:
>  >>> try:
>  >>>     shutil.copy("/file.xml","/Volumes/External/file.xml")
>  >>> except Exception, err:
>  >>>     print sys.exc_info()[0]
>  >>>     print err
> 
> This is the output:
> exceptions.UnicodeDecodeError
> 'ascii' codec can't decode byte 0xd6 in position 26: ordinal not in  
> range(128)]
> 
> What could the possible cause of this be? Shouldn't shutil simply be  
> reading and writing the bytes and not character decoding them?

Do you really get this error from the code above or just in the real
program?  Are the paths hard coded in the real program too?

Ciao,
	Marc 'BlackJack' Rintsch


From gagsl-py2 at yahoo.com.ar  Thu Mar 29 13:55:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 29 Mar 2007 14:55:04 -0300
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
Message-ID: <op.tpypd22mx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 29 Mar 2007 01:56:15 -0300, Steven D'Aprano  
<steve at REMOVE.THIS.cybersource.com.au> escribi?:

> By the way, "id(obj) == id(another_object)" is just a long way of writing
> "obj is another_object".

Just as a side note: that's not true, testing by id() only works if both  
objects are alive at the same time.

py> id(object()) == id(object())
True
py> object() is object()
False

So using the `is` operator is the only safe way to test for identity.

-- 
Gabriel Genellina



From kyosohma at gmail.com  Wed Mar 28 16:04:25 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 28 Mar 2007 13:04:25 -0700
Subject: Finding a module's sub modules at runtime
In-Reply-To: <460ab913$0$16387$88260bb3@free.teranews.com>
References: <460ab913$0$16387$88260bb3@free.teranews.com>
Message-ID: <1175112265.427331.93340@o5g2000hsb.googlegroups.com>

On Mar 28, 2:44 pm, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> [If this is documented somewhere, please just point me there.  I googled on
> the terms that made sense to me, and didn't find anything.]
>
> So, I have:
>
> ModTest
>         __init__.py
>         AModule.py
>         BModule.py
>         CModule.py
>
> All works fine.  However, when I import ModTest, I would like it to discover
> and store the names of the modules beneath it, and construct a list, say
> mod_list, that I can access later to find the names of the sub-modules in
> this module.  Kind of setting __all__ at run time, I guess (yes, I'm aware
> of the case caveats).
>
> I figured __init__.py coudl take its own __path__ and walk the directory to
> find all .py files other than __init__.py, but that seemed hackish.  Is
> there an "official" way to do this?  Or a better way?
>
> To give "context:" all the modules will have classes that have the same
> name, same methods etc.  One of the modules will be picked depending on
> which implementation is needed.
>
> Thanks!
>
> j
>
> --
> Joshua Kugler
> Lead System Admin -- Senior Programmerhttp://www.eeinternet.com
> PGP Key:http://pgp.mit.edu/ ID 0xDB26D7CE
>
> --
> Posted via a free Usenet account fromhttp://www.teranews.com

I think you need to research how to create documentation. When I
import a module/package, I can then type help(moduleName) and it'll
give me the module or package's contents.

http://mail.python.org/pipermail/python-list/2003-February/192069.html

You may be able to figure out how to do this just be studying the
"help" module itself.

Mike



From aisaac at american.edu  Sat Mar 10 16:44:43 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 10 Mar 2007 21:44:43 GMT
Subject: __init__ in subclass of tuple
References: <JtrIh.97$I56.9@trnddc06>
	<mailman.4894.1173507944.32031.python-list@python.org>
Message-ID: <fFFIh.192$Eg4.50@trnddc03>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:
> The signature is like you said, but it's not a tuple method, it's an
> object method instead:
> py> tuple.__init__
> <slot wrapper '__init__' of 'object' objects>

> The only important thing is that it says: of 'object' objects, not: of
> 'tuple' objects. Compare with:
> py> tuple.__len__
> <slot wrapper '__len__' of 'tuple' objects>




Thanks for that clue!
Alan





From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:52:57 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:52:57 -0300
Subject: (unknown)
References: <BAY124-W4390D360B0869706CB42B4F4700@phx.gbl>
Message-ID: <op.tpbu2jlqx6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 17 Mar 2007 03:54:22 -0300, Milton Segura <syrax6l at hotmail.com>  
escribi?:

> Hello, I'm trying to exclude files from a list using the following code:
> for item in dirs:    if item.find('Software') > -1:         
> dirs.remove(item)    elif item.find('Images') > -1:         
> dirs.remove(item)
> For some reason.. it just won't exclude them.
> I'd like to know why and how to fix it.

Don't iterate over the list and alter it at the same time; the iterator  
gets confused.
Iterate over a copy:

for item in dirs[:]:
    if item.find(...)

or backwards:

for item in reversed(dirs):
    if item.find(...)

-- 
Gabriel Genellina



From duncan.booth at invalid.invalid  Sun Mar 11 06:22:54 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 Mar 2007 10:22:54 GMT
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
Message-ID: <Xns98F069A62A37Cduncanbooth@127.0.0.1>

"David Cramer" <dcramer at gmail.com> wrote:

> On Mar 10, 10:52 pm, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com>
> wrote:
>> David Cramer wrote:
>> > If you had an application that you were about to begin development on
>> > which you wanted to be cross platform (at least Mac and Windows),
>> > would you suggest using c++ and Python?
>>
>> I'd strongly consider a pure python solution (I'd choose wxpython),
>> but if I needed to code backend stuff in a lower level language I'd
>> use C rather than C++.
> 
> Well we want it to be very robust, and python isn't exactly the
> fastest language, or one with the lowest overhead :)
> 
So if you want it to be robust it's a no brainer: Python and no C++ or C.

I'd advise you to start off doing it in pure Python, then when you get it 
working see if it is fast enough, and if not profile it and find the 
bottlenecks. Those bits which really do need speeding up you should then 
rewrite using Pyrex, which won't take long at all since it is basically the 
same syntax. Also see whether Psyco helps.

Python can be slow, but if you leverage the built in functionality 
correctly you'll find it isn't much slower than C/C++ for many tasks, and 
can even be faster than you would get from C/C++ without a spending a very 
long time optimising it (that's because people have already spent a very 
long time optimising Python's builtin functionality).

Even if you do eventually find you have to rewrite parts of the code in 
C/C++ you should first have done what you can to optimise it in Python. 
Usually the best way to speed up something which is too slow is to use a 
different algorithm. That sort of change is comparatively easy to do in 
Python but an expensive programming exercise in C/C++. When you come to 
reimplement it then you'll be converting the already optimised code, which 
in many cases will be much easier than writing it in C/C++ from scratch.

If you look at http://page.mi.fu-berlin.de/~prechelt/Biblio/jccpprtTR.pdf 
you'll see that, at least for that task, the relative runtimes for C/C++ 
and Python widely overlap. Yes, the C/C++ implementation included some very 
fast ones, but they also included slows ones (and only Python of all the 
languages tested had no unusable implementations). OTOH, time to write the 
programs does not overlap. Of course, since that paper was written Python 
has changed a lot.


From robert.kern at gmail.com  Wed Mar 14 15:12:41 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Wed, 14 Mar 2007 14:12:41 -0500
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <1173884048.683423.39750@o5g2000hsb.googlegroups.com>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>	<mailman.5051.1173838059.32031.python-list@python.org>	<1173841694.932998.290390@d57g2000hsg.googlegroups.com>	<mailman.5055.1173842430.32031.python-list@python.org>
	<1173884048.683423.39750@o5g2000hsb.googlegroups.com>
Message-ID: <et9hfd$e9r$1@sea.gmane.org>

vj wrote:
> What should I be using to replace Numeric/arrayobject.h:
> 
> numpy/arrayobject.h
> 
> or
> 
> numpy/oldnumeric.h

Replacing "numpy/oldnumeric.h" is the compatibility header. If you don't want to
convert your code to use the new APIs (and you might; it is much improved), then
that should be all that you need to do to get your old extension modules running
with numpy.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From arnodel at googlemail.com  Wed Mar  7 13:32:53 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 7 Mar 2007 10:32:53 -0800
Subject: catching exceptions from an except: block
Message-ID: <1173292373.770519.158490@8g2000cwh.googlegroups.com>

Hi all,

Imagine I have three functions a(x), b(x), c(x) that each return
something or raise an exception.  Imagine I want to define a function
that returns a(x) if possible, otherwise b(x), otherwise c(x),
otherwise raise CantDoIt.

Here are three ways I can think of doing it:

----------
# This one looks ugly
def nested_first(x):
    try:
        return a(x)
    except:
        try:
            return b(x)
        except:
            try:
                return c(x)
            except:
                raise CantDoIt

# This one looks long-winded
def flat_first(x):
    try:
        return a(x)
    except:
        pass
    try:
        return b(x)
    except:
        pass
    try:
        return c(x)
    except:
        raise CantDoIt

# This one only works because a,b,c are functions
# Moreover it seems like an abuse of a loop construct to me
def rolled_first(x):
    for f in a, b, c:
        try:
            return f(x)
        except:
            continue
    raise CantDoIt
----------

I don't feel happy with any of these.  Is there a more satisfying way
of doing this in Python? What I would like is something like:

----------
# This one isn't correct but looks the clearest to me
def wished_first(x):
    try:
        return a(x)
    except:
        return b(x)
    except:
        return c(x)
    except:
        raise CantDoIt
----------

I guess what I'm looking for is some sort of
if:
elif:
...
elif:
else:

but for try: except:
That's why
try:
except:
except:
...
except:

seemed natural to me :)  And I'd like to find a nice way to do this in
a syntactically correct way.

Note: I've chosen functions a, b, c, but really I'm looking for a way
that is suitable for any chunk of code.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 20 05:28:10 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 20 Mar 2007 10:28:10 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
Message-ID: <45ffa91e$0$2136$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Mon, 19 Mar 2007 19:48:37 +1100, Ben Finney wrote:
> 
>> It's also best to inherit every class from another class, leading to a
>> single hierarchy for all classes and types. 'object' is the one to
>> choose if you don't want the behaviour of any other class.
> 
> What's wrong with old-style classes?

Almost everything. That's why Python 2.2 introduced new-style classes. 
IIRC it was some 6 years ago now.

> On the plus side:
> 
> - Why inherit from something if you don't need to?

You don't have to inherit. You can also make a class new-style by 
setting it's __metaclass__ attribute properly. But that's more typing !-)

> - Less typing.

Lol. Six keystrokes in the worst case.

> - Attribute-lookup is much faster, perhaps as much as twice as fast.
> http://www.python.org/~jeremy/weblog/030506.html

This was in 2003. Did you bother testing now ? with Python 2.4.4:

 >>> class Old:
...     def __init__(self):
...             self.attr = "old"
...
 >>> class New(object):
...     def __init__(self):
...             self.attr = "new"
...
 >>> from timeit import Timer
 >>> told = Timer('old.attr', 'from __main__ import Old; old=Old()')
 >>> tnew = Timer('new.attr', 'from __main__ import New; new=New()')
 >>> told.repeat()
[0.40867519378662109, 0.39075493812561035, 0.38998913764953613]
 >>> tnew.repeat()
[0.58840394020080566, 0.5948030948638916, 0.36941695213317871]

Not really "twice as fast" AFAICT.

Now if you're really favor raw speed over expressivity, then you might 
wan to choose another language.

> 
> - Documentation on old style classes is more extensive.

Since new-style classes are backward compatible with old-style ones, 
almost all the old-style classes documentation applies to new-style ones 
as well. Everything else is quite well documented too:
http://www.python.org/doc/newstyle/

> - You can't use new style classes for exceptions.

Exceptions are new-style classes in 2.5.

> 
> 
> On the minus side:
> 
> - Properties don't work as you expect them too.

properties don't work. Period. Properties rely on the descriptor 
protocol, which only works with new-style classes.

> - Slots don't work at all.
> 
  - no support for the descriptor protocol
  - no __getattribute__
  - no metaclasses
  - no proper constructor
  - no classmethod
  - no super()

> In other words, the only reason why you HAVE to use a new style class is
> that you need properties or __slots__.

The reason why you have to use new-style classes is that it's the 
official Python object model since december 2001 - old-style classes 
being kept for compatibility. The reason why you want to use them is 
that they provide everything old-style classes did, and *way much more*. 
FWIW, if Python didn't have this powerful object model, I would have 
switched to another language long ago. And I'm probably not the only one.

> You might WANT to use a new style
> class to inherit from built-in types. 

Since builtin types are all new-style classes, any class inheriting from 
a builtin is a new-style class. FWIW, that's one of the reason for the 
object model changes way back in 2001.

> Otherwise, the choice between old
> and new is not very important.

Your opinion. Too bad you're missing some of the most powerful parts of 
the language.


From dashawn at gmail.com  Wed Mar 28 06:21:21 2007
From: dashawn at gmail.com (dashawn888)
Date: 28 Mar 2007 03:21:21 -0700
Subject: Beginner GTK question
In-Reply-To: <z2ENh.47807$_R.7847@newsfe23.lga>
References: <1174820246.350058.96280@y66g2000hsf.googlegroups.com>
	<z2ENh.47807$_R.7847@newsfe23.lga>
Message-ID: <1175077281.853090.54170@l77g2000hsb.googlegroups.com>

On Mar 25, 5:00 pm, Dave Cook <davec... at nowhere.net> wrote:
> On 2007-03-25, dashawn888 <dash... at gmail.com> wrote:
>
> > gui.py:79: GtkWarning: Quit: missing action
> >   menubar = uimanager.get_widget('/MenuBar')
> >                            <menuitem name="Quit"/>
>
> This should probably be action="Quit".
>
> Dave Cook


Fixed it.  :)  Thanks



From stargaming at gmail.com  Mon Mar  5 12:03:42 2007
From: stargaming at gmail.com (Stargaming)
Date: Mon, 05 Mar 2007 18:03:42 +0100
Subject: Newbie question
In-Reply-To: <mailman.4684.1173113802.32031.python-list@python.org>
References: <mailman.4684.1173113802.32031.python-list@python.org>
Message-ID: <eshihi$1vq7$1@ulysses.news.tiscali.de>

Tommy Grav schrieb:
> Hi list,
> 
>    this is somewhat of a newbie question that has irritated me for a  
> while.
> I have a file test.txt:
> 
> 0.3434  0.5322 0.3345
> 1.3435  2.3345 5.3433
> 
> and this script
> lines = open("test.txt","r").readlines()
> for line in lines:
>    (xin,yin,zin) = line.split()
>    x = float(xin)
>    y = float(yin)
>    z = float(zin)
> 
> Is there a way to go from line.split() to x,y,z as floats without  
> converting
> each variable individually?
> 
> Cheers
>    Tommy

For this case, there are list comprehensions (or map, but you shouldn't 
use it any longer):

 >>> a = "0.3434  0.5322 0.3345"
 >>> b = a.split()
 >>> map(float, b)
[0.34339999999999998, 0.53220000000000001, 0.33450000000000002]
 >>> [float(x) for x in b]
[0.34339999999999998, 0.53220000000000001, 0.33450000000000002]

I think it should be easy to apply this to your example above.

Stargaming


From tchur at optushome.com.au  Fri Mar  2 14:00:36 2007
From: tchur at optushome.com.au (Tim Churches)
Date: Sat, 03 Mar 2007 06:00:36 +1100
Subject: HL7 servers in Python?
In-Reply-To: <200703021120859.SM03288@room5.infor-med.com>
References: <200703021120859.SM03288@room5.infor-med.com>
Message-ID: <45E87454.2050107@optushome.com.au>

Richard Low, MD wrote:
> Richard,
> 
> I was most impressed by your answer below (in '03)
> 
> Do you know whether there is a third party application/library that can
> interface our software to the HL7 sockets systems so we do not have to
> develop them?
> 
> If you do, which one would you recommend?
>
> Richard M. Low MD
> CEO
> ____________________________________
> Infor-Med Corporation
> 6271 Variel Avenue, Suite A
> Woodland Hills, California 91367-2512, USA
> Phone:  818-592-2900
> Direct fax: (818)743-7759
> Email: <mailto:richlow at infor-med.com>richlow at infor-med.com
> URL:  <http://www.infor-med.com/>http://www.infor-med.com

I posed the original question back in 2003 which prompted Richard
Sharp's reply, and as far as I am aware, there is still no general
purpose HL7 2.x "server" written in Python. If that is still your
requirement, then you'll have to write one, but it is highly feasible.
We ended up writing our own, back in 2003, which met our specific need
of listening for incoming HL7 2.x messages of just a few specific types
using MLLP (HL7 minimum lower-level protocol), parsing and validating
them, writing the data as a transaction to a special purpose PostgreSQL
database and sending back an ACK. It is part of a public health
surveillance system described here:
http://www.biomedcentral.com/1471-2458/5/141

The code for our listener is available at
http://sourceforge.net/project/showfiles.php?group_id=123700&package_id=139062

Please note and observe the the open source license under which that
code is made available (it is a Mozilla license, so should not cause you
too many difficulties should you chose to make use of it, but do read
the license). At the very least examination of our code may give you
some ideas, although it is written for POSIX platforms and I note that
your company's products seem to be MS-Windows-based. The Python-based
solution has been relentlessly reliable in production use over the last
3 and a half years.

If you are looking for more general HL7 servers which use Python in some
respect but aren't necessarily written entirely in Python, then have a
look at Mirth - see http://www.mirthproject.org/ - which is an open
source HL7 messaging server which can use Python (or Jython) to script
rules and actions for incoming and outgoing messages, and Interfaceware,
whose  closed-source products also embed Python for scripting purposes -
see for example http://www.interfaceware.com/manual/ch-7-7-4.html

There may be others.

Hope this helps,

Tim C

> HL7 servers in Python?
> 
> Richard Sharp
> <mailto:python-list%40python.org?Subject=HL7%20servers%20in%20Python%3F&In-Reply-To=>rbsharp
> at gmx.de
> Mon Jun 16 17:29:22 CEST 2003
> 
>    * Previous message:
> <http://mail.python.org/pipermail/python-list/2003-June/210414.html>"Structure
> and Interpretation of Computer Programs" in Python?
>    * Next message:
> <http://mail.python.org/pipermail/python-list/2003-June/210188.html>HL7
> servers in Python?
>    * Messages sorted by:
> <http://mail.python.org/pipermail/python-list/2003-June/date.html#210163>[
> date ]
> <http://mail.python.org/pipermail/python-list/2003-June/thread.html#210163>[
> thread ]
> <http://mail.python.org/pipermail/python-list/2003-June/subject.html#210163>[
> subject ]
> <http://mail.python.org/pipermail/python-list/2003-June/author.html#210163>[
> author ]
> 
> ----------
> 
> On Fri, 13 Jun 2003 07:10:26 +1000, Tim Churches wrote:
> 
>> Does anyone know of a Python HL7 socket server/daemon - that is, a
>> daemon which accepts socket connections on a TCP port from an HL7
>> source, receives an HL7 message via the connection, hands off the
>> message for processing, and then sends back an ACK or NACK H7 message -
>> usually synchronously, via a blocking connection (thus the server needs
>> to be multi-threaded)?
>>
>> HL7 stands for Health Level 7 (where 7 represents the 7th layer of the
>> OSI network stack) and is a widely-used standard for communication of
>> medical information. I'm not looking for HL7 message assembly or parsing
>> libraries, just the socket server bit. Perhaps the SocketServer module
>> in the Python library makes this so trivial that no-one has felt the
>> need to write a specific HL7 server in Python? Anyway, I've looked on
>> Google but can't spot anything obvious.
> 
> It is extremely doubtful, given the specialised nature of the question,
> whether most people understand what you want. Given that HL7 is really
> only sending and receiving some information in a curious format, and that
> you either receive data and then send the other side an ACK or a NAK, or
> wait until they do that in reply to your message, it is really not all
> that complicated.
> 
> The short answer to you question ist Twisted -
> <http://www.twistedmatrix.com>http://www.twistedmatrix.com
> 
> What may confuse you is that it does not use blocking sockets and
> therefore does not need to be multithreaded, although I think it can be,
> but it does work.
> 
> My bread and butter Python work is software that interfaces between a
> Pathology System running any number of versions of Unix and some
> overarching Hospital System that provides me with patient data and to
> which I deliver reports and accounting data, mostly, but not always, in
> HL7.
> 
> I have one Pathology Unit that does work for two hospitals and
> communicates with two hospital systems. With Twisted I basically subclass
> protocol.Factory and implement the necessary submethods.
> 
> It is a little daunting at first and there was at the time (about 2 years
> ago) when no usable documentation worth speaking of was available. I am
> also stuck at the moment with Twisted 0.18.0, because it runs with Python
> 1.5.2, and I had trouble getting Python >= 2.0 running on the all the
> Unixes I had to get it running on. In the meantime, I think I've got that
> under control.
> 
> If you're interested in looking at the programms I will have to ask the
> company I developed the software for, but the complete program is only ca.
> 800 Lines and covers 4 Low Level Protocols.
> 
> I hope I have been of some help. Once people realise that what you want is
> some sort of select-loop-server, then they will probably gush forth with
> helpful suggestions.
> 
> Greetings,
> 
> Richard Sharp
> 
> 
> 
> ----------
>    * Previous message:
> <http://mail.python.org/pipermail/python-list/2003-June/210414.html>"Structure
> and Interpretation of Computer Programs" in Python?
>    * Next message:
> <http://mail.python.org/pipermail/python-list/2003-June/210188.html>HL7
> servers in Python?
>    * Messages sorted by:
> <http://mail.python.org/pipermail/python-list/2003-June/date.html#210163>[
> date ]
> <http://mail.python.org/pipermail/python-list/2003-June/thread.html#210163>[
> thread ]
> <http://mail.python.org/pipermail/python-list/2003-June/subject.html#210163>[
> subject ]
> <http://mail.python.org/pipermail/python-list/2003-June/author.html#210163>[
> author ]
> 
> ----------
> <http://mail.python.org/mailman/listinfo/python-list>More information
> about the Python-list mailing list
> 



From grflanagan at yahoo.co.uk  Fri Mar 23 04:41:05 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 23 Mar 2007 01:41:05 -0700
Subject: Idiom for running compiled python scripts?
In-Reply-To: <pan.2007.03.23.07.30.56@mailinator.com>
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
Message-ID: <1174639265.373685.133720@d57g2000hsg.googlegroups.com>

On Mar 23, 8:30 am, Mark <markb... at mailinator.com> wrote:
>
> Of course I am not deleting the sources. In fact, I am also talking
> about python scripts being called from shell scripts.

There's a nice recipe in Python Cookbook (Martelli et al.) for this.
It involves zipping your .pyc files and adding a shell stub. Never
used it before but I'm going to need something similar in the near
future, probably with a text templating system such as Cheetah
(www.cheetahtemplate.org).

HTH

Gerard





From skip at pobox.com  Thu Mar 15 13:30:46 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 15 Mar 2007 12:30:46 -0500
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <Xns98F4A2305FD17duncanbooth@127.0.0.1>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
	<1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>
	<Xns98F4A2305FD17duncanbooth@127.0.0.1>
Message-ID: <17913.33478.84674.649652@montanaro.dyndns.org>


    Duncan> I think I'd prefer the barbaric:

    Duncan>    return len(list(iterator))

    Duncan> since at least it is guaranteed to terminate.

Are you sure?  There's no guarantee that an iterator will terminate:

    len(list(itertools.cycle(range(10))))

Skip


From lbates at websafe.com  Fri Mar  9 14:34:34 2007
From: lbates at websafe.com (Larry Bates)
Date: Fri, 09 Mar 2007 13:34:34 -0600
Subject: Are Lists thread safe?
In-Reply-To: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
Message-ID: <l5CdnabcnoAsK2zYnZ2dnUVZ_vPinZ2d@comcast.com>

abcd wrote:
> Are lists thread safe?  Or do I have to use a Lock when modifying the
> list (adding, removing, etc)?  Can you point me to some documentation
> on this?
> 
> thanks
> 
You really should at least try Google first:

http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-thread-safe.htm

-Larry


From rmcore at gmail.com  Sat Mar 10 10:16:02 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Sat, 10 Mar 2007 09:16:02 -0600
Subject: Database module & multithreading
In-Reply-To: <1173537553.064123.13260@t69g2000cwt.googlegroups.com>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
Message-ID: <995EE9FC-ADFB-4AF0-91B3-E439C7AD6CAE@gmail.com>

>
> Thanx for this pointer buddy! I have done my homework. Some Database
> modules are not actively maintained some modules  does not work with
> Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
> it dosent allow me to use multi threading so which database module is
> better in terms of multithreading

Actually, I think sqlite3 just requires that each thread have its own  
connection and cursor.




From nick at craig-wood.com  Thu Mar 29 12:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 29 Mar 2007 11:30:04 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<mailman.5697.1175060331.32031.python-list@python.org>
	<slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
	<571hbfF2a7ngiU1@mid.uni-berlin.de>
Message-ID: <slrnf0nodg.u8v.nick@irishsea.home.craig-wood.com>

Diez B. Roggisch <deets at nospam.web.de> wrote:
> > 
> > I beleive the convention is when calling an OS function which might
> > block the global interpreter lock is dropped, thus allowing other
> > python bytecode to run.
> 
> 
>  So what? That doesn't help you, as you are single-threaded here. The 
>  released lock won't prevent the called C-code from taking as long as it 
>  wants. |And there is nothing you can do about that.

I'm assuming that the timeout function is running in a thread...

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From laurent.pointal at limsi.fr  Wed Mar 14 07:03:58 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 14 Mar 2007 12:03:58 +0100
Subject: Attribute monitoring in a class
In-Reply-To: <mailman.5071.1173868190.32031.python-list@python.org>
References: <mailman.5071.1173868190.32031.python-list@python.org>
Message-ID: <et8kqa$eo7$1@news2.u-psud.fr>

Joel Andres Granados a ?crit :
> Hi list:
> 
> I have googled quite a bit on this matter and I can't seem to find what
> I need (I think Im just looking where I'm not suppose to :).  I'm
> working with code that is not of my authorship and there is a class
> attribute that is changes by directly referencing it (object.attr =
> value) instead of using a getter/setter (object.setAttr(Value) )
> function.  The thing is that I have no idea when the change occurs and I
> would REALLY like to find out.
> So here comes my question .....
> Is there a function construct inside a python class that is
> automatically called when an attr is changed????
> Like for example
> 
> /class Class:
>    def __init__();
>       self.attr = "whatever"
> 
>    def __attrChangeFunction__():
>       print "It has changed"

Use a property. Extract from Python 2.3 docs:
"""
property(  	[fget[, fset[, fdel[, doc]]]])
    Return a property attribute for new-style classes (classes that
derive from object).

    fget is a function for getting an attribute value, likewise fset is
a function for setting, and fdel a function for del'ing, an attribute.
Typical use is to define a managed attribute x:

    class C(object):
        def getx(self): return self.__x
        def setx(self, value): self.__x = value
        def delx(self): del self.__x
        x = property(getx, setx, delx, "I'm the 'x' property.")

    New in version 2.2.
"""

> obj = Class()
> obj.attr = "other whatever"
> 
> *Output:*
> It has changed
> 
> /
> Thanks for the help.
> Regards/
> /

A+

Laurent.


From aleax at mac.com  Sun Mar 18 19:52:39 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 16:52:39 -0700
Subject: list comprehension help
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<5f56302b0703180924o3ebf61e2nb2d50280456f8448@mail.gmail.com>
	<mailman.5249.1174236254.32031.python-list@python.org>
	<XQgLh.128867$_73.74494@newsread2.news.pas.earthlink.net>
	<1174252844.405851.11460@o5g2000hsb.googlegroups.com>
Message-ID: <1hv6k0m.8sn25lgkk7cuN%aleax@mac.com>

f<cptnwillard at gmail.com> wrote:

> I wonder whether the following be more efficient if DB was a
> dictionnary:
> 
> Splits = (line.split(' ') for line in open('file.text', 'r'))
> DB = dict([(S[0], S[-1]) for S in Splits])

You'd still be doing much more splitting work (and behind-the-scene
allocation and freeing of memory) than strictly needed (only meaningful
for lines that are really big).

Also, lose the brackets immediately inside the ( ) in the second line --
no need to take up huge amounts of memory (by a list comprehension) when
you're only going to work on one item at a time anyway (so a genexp
suffices).

The observation that either the line or the S[-1] entry needs to be
subjected to a .rstrip('\n') also still holds here.

Use python -mtimeit to measure the runtimes of various alternatives --
be careful about what you place in -s (initialization, not looped-upon
and not measured) and what you don't (that _will_ be looped upon, and
measured).


Alex


From bj_666 at gmx.net  Wed Mar 14 11:57:45 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 14 Mar 2007 16:57:45 +0100
Subject: Grep Equivalent for Python
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<mailman.5076.1173876678.32031.python-list@python.org>
	<et8u0e$k2a$1@news2.u-psud.fr>
Message-ID: <pan.2007.03.14.15.57.44.398564@gmx.net>

In <et8u0e$k2a$1 at news2.u-psud.fr>, Laurent Pointal wrote:

> Steve Holden a ?crit :
>> Regular expressions aren't really needed here. Untested code follows:
>> 
>> for line in open('/proc/meminfo').readlines:
> for line in open('/proc/meminfo').readlines():
for line in open('/proc/meminfo'):

>>     if line.startswith("Memtotal:"):
>>         name, amt, unit = line.split()
>>         print name, amt, unit
>>         break

Of course it's cleaner to assign the file object to a name and close the
file explicitly after the loop.

Ciao,
	Marc 'BlackJack' Rintsch


From __peter__ at web.de  Tue Mar 27 02:16:57 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 Mar 2007 08:16:57 +0200
Subject: Associate image name with list item
References: <b8eda$4608822b$4275d90a$15798@FUSE.NET>
Message-ID: <euacsn$mml$03$1@news.t-online.com>

Kevin Walzer wrote:

> I'm trying to avoid a *lot* of typing in my Tkinter application by
> associating image names with items in a list. Here is my sample list:
> 
> self.catlist = [
>              'all', 'installed', 'base', 'crypto', 'database', 'devel',
>          'editors', 'games', 'gnome', 'graphics', 'kde', 'languages',
> 'libs', 'libs_perlmods',
>          'libs_pythonmods', 'libs_rubymods', 'net', 'sci', 'shells',
> 'sound', 'text', 'web',
>          'x11_system', 'x11-wm', 'x11'
>              ]
> 
> I've also already created a bunch of images with names that correspond
> to the list above, i.e. self.all, self.installed, and so on.  Here's the
> rest of my code:
> 
> for item in self.catlist:
>              print item
>              self.categorytable.insert(END, item)
> self.categorytable.cellconfigure("end,0", image=self.item)
> 
> This yields the following error:
> 
> AttributeError: item
> 
> because, of course, I don't actually have an image called self.item.
> 
> What I'm trying to do is get the value of the variable "item" and plug
> it into the image name, so that self.item actually corresponds to
> self.installed, self.base, etc. Trying something like
> 
> self.categorytable.cellconfigure("end,0", image=self.%s % item)
> 
> just yields a syntax error: SyntaxError: invalid syntax
> 
> Can anyone point me in the right direction?

The way you have framed your question the direct answer is

self.categorytable.cellconfigure("end,0", image=getattr(self, item))

but I think not making the images attributes and using a dictionary is the
superior approach. You avoid name clashes between image names and program
logic, and you can easily deal with image names that are not valid
attribute names (like 'x11-wm').

Peter



From nick at craig-wood.com  Tue Mar 27 01:34:48 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 27 Mar 2007 00:34:48 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<gINNh.70$5e2.44@newssvr11.news.prodigy.net>
Message-ID: <slrnf0gber.i3r.nick@irishsea.home.craig-wood.com>

James Stroud <jstroud at mbi.ucla.edu> wrote:
>  Nick Craig-Wood wrote:
> > Did anyone write a contextmanager implementing a timeout for
> > python2.5?
> > 
> > I'd love to be able to write something like
> > 
> >     with timeout(5.0) as exceeded:
> >         some_long_running_stuff()
> >     if exceeded:
> >         print "Oops - took too long!"
> > 
> > And have it work reliably and in a cross platform way!
> > 
> > From my experiments with timeouts I suspect it won't be possible to
> > implement it perfectly in python 2.5 - maybe we could add some extra
> > core infrastructure to Python 3k to make it possible?
> > 
> 
>  I'm guessing your question is far over my head, but if I understand it, 
>  I'll take a stab:
> 
>  First, did you want the timeout to kill the long running stuff?

Yes.

>  I'm not sure if its exactly what you are looking for, but I wrote a 
>  timer class that does something like you describe:
> 
>  http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/464959
> 
>  Probably you can do whatever you want upon timeout by passing the 
>  appropriate function as the "expire" argument.

I don't think your code implements quite what I meant!


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From harlinseritt at yahoo.com  Fri Mar 23 09:16:07 2007
From: harlinseritt at yahoo.com (Harlin Seritt)
Date: 23 Mar 2007 06:16:07 -0700
Subject: Catching an unknown error
Message-ID: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>

Using the code below:

---BEGIN CODE---

value = raw_input("Type a divisor: ")
try:
   value = int(value)
   print "42 / %d = %d" % (value, 42/value)
except ValueError:
	print "I can't convert the value to an integer"
except ZeroDivisionError:
	print "Your value should not be zero"
except:
	print "Something unexpected happened"

---END CODE---

In the last 'except' block, how can I print out the particular error
name even though one is not specifically named?

Thanks,

Harlin



From rowen at cesmail.net  Mon Mar 26 15:04:15 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Mon, 26 Mar 2007 12:04:15 -0700
Subject: Tkinter Toplevel geometry
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
Message-ID: <rowen-BF6194.12041526032007@gnus01.u.washington.edu>

In article <1174803181.656189.303200 at l77g2000hsb.googlegroups.com>,
 "Chris" <ceball at gmail.com> wrote:

> Hi,
> 
> If a user resizes a Toplevel window, or I set a Toplevel's geometry
> using the geometry() method*, is there any way to have the geometry
> reset to that required for all the widgets?
> 
> I think I found what I'm looking for in tk itself:
> """
> 13.3. How can I clear the geometry settings for a toplevel?
> If you want to have Tk resize your toplevel to what the toplevel
> requires (ie: the user might have resized it, or a widget was
> removed), use [wm geometry $toplevel].
> """
...

I'm glad you got that figured out.

Here's a variant question that has driven me crazy...how to create a 
general-purpose variation of toplevel that:
- can only be resized in one direction and auto-sizes (to fit widgets) 
in the other direction?
- has a "reasonable" initial size in the resizable direction.

The first part is easy -- just use the "resizable" method. I've never 
figured out a clean solution to the second question because:
- tk doesn't allow setting just X or Y size of a toplevel (the geometry 
call requires both or neither)
- one can use a frame to force the resizable dimension to the desired 
initial value, but to do that you either have to know in advance what 
geometry manager the user is using, or make them pack their widgets into 
a frame inside the toplevel

I ended up binding to the Configure event, but it's rather messy for 
such a simple-seeming thing. (The really aggravating part is that perl 
can do this directly because it uses C instead of tcl to talk to tk, and 
tk's C interface is more flexible about setting toplevel geometry!).

-- Russell


From arnodel at googlemail.com  Wed Mar  7 16:48:18 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 7 Mar 2007 13:48:18 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <45EF260C.6000205@websafe.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
Message-ID: <1173304097.821562.75060@t69g2000cwt.googlegroups.com>

On Mar 7, 8:52 pm, Larry Bates <lba... at websafe.com> wrote:
[snip]
> Without knowing more about the functions and the variable it is somewhat
> hard to tell what you are trying to accomplish.  If a, b, c are functions
> that act on x when it is a different type, change to one function that
> can handle all types.

I'm not really thinking about this situation so let me clarify. Here
is a simple concrete example, taking the following for the functions
a,b,c I mention in my original post.
  - a=int
  - b=float
  - c=complex
  - x is a string
This means I want to convert x to an int if possible, otherwise a
float, otherwise a complex, otherwise raise CantDoIt.

I can do:

for f in int, float, complex:
    try:
        return f(x)
    except ValueError:
        continue
raise CantDoIt

But if the three things I want to do are not callable objects but
chunks of code this method is awkward because you have to create
functions simply in order to be able to loop over them (this is whay I
was talking about 'abusing loop constructs').  Besides I am not happy
with the other two idioms I can think of.

--
Arnaud



From psdasilvaX at esotericaX.ptX  Sun Mar 25 14:31:46 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sun, 25 Mar 2007 19:31:46 +0100
Subject: Join strings - very simple Q.
In-Reply-To: <1174772896.902905.25640@p15g2000hsd.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<1174746810.280731@jubilee.claranet.pt>
	<1174772896.902905.25640@p15g2000hsd.googlegroups.com>
Message-ID: <1174847538.764119@jubilee.claranet.pt>

John Machin escreveu:
> On Mar 25, 12:32 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>> John Machin escreveu:
..

> What was not obvious was (1) if you have been using Python for a
> while, how you managed to be unaware of str methods (2) if you are a
> newbie, how you managed to find out about the string module but not
> find out about str method

> 
This is a nice argument for perhaps a politician ...
I am not exactly a newbie if you talk about the time I have
been using Python but I have used it very few times and
sparsely in time. I have always used 'string' to do the
strings stuff. When I need a method, I just search the python
library manual index. Then I have a page with all string methods
available. This is why I knew 'string' and didn't know str.

>
> [e.g. it's easy to miss the one line in the
> "official" Python tutorial that refers to them] (3) why you were not
> using obvious(?) methods to find out for yourself -- much faster than
> posing a question on the newsgroup, and you don't have to face the
> possibility of an impertinent response :-)

That's the kind of answer I hate. Of course anyone could find an
answer to any questions without posting them to this NG.
Google, Python inumerous manuals, books, etc. So, why the NG existence?
The reason we post here is because sometimes it is easier,
or we wait for any further discussion on the subject or just
because we want it.
There are lots of people in this NG with different levels of
knowledge. If you feel that it is a question that deserves the
honour of your response, just do it. Write it on the stones and
send them down to the common people :-) . If not, just close your eyes
and let others respond. If the question does not deserve any response,
then the people will judge and will leave it unanswered.
...
...
> you could try:
> 
> (1) going to the docs page on the Python website (http://
> www.python.org/doc/), click on the "Search" link about one-third down
> the page, and search for "join". You would get 6 results, one of which
> is "join() (string method)"
This, together with the answer other people here gave, is helpful.
When I posted I thought the subjec was new, do you remember?
...

> (3) Use Google groups, go to comp.lang.python, type "join string" into
> the search box, and click on "Search this group". First result is the
> current thread; most (or maybe all) of the next six or so will give
> you the syntax your were looking for.
> 
> (4) Using Google or any other reasonable web searcher, search for the
> 3 words: Python join string. Any one of the first few hits gives the
> answer you were seeking.


Yes, and also, as last resource, I could always consult an oracle
somewhere in the ancient Greece, came back and unsubscribe this NG. :-)

You could just type ",".join(L).
Look at the time we are loosing!

Best regards.
Paulo


From paduffy at cisco.com  Fri Mar  2 13:09:15 2007
From: paduffy at cisco.com (paduffy at cisco.com)
Date: 2 Mar 2007 10:09:15 -0800
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
Message-ID: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>

Folks,

I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
Reading a file of 13 GBytes, one line at a time.  It appears that,
once the read line passes the 4 GByte boundary, I am getting
occasional random line concatenations.  Input file is confirmed good
via UltraEdit.  Groovy version of the same app runs fine.

Any ideas?

Cheers



From mitko at qlogic.com  Thu Mar 29 13:42:33 2007
From: mitko at qlogic.com (Mitko Haralanov)
Date: Thu, 29 Mar 2007 10:42:33 -0700
Subject: Question about details of __import__
Message-ID: <20070329104233.2129d267@opal.pathscale.com>

Hi all,

I am going to do my best to describe the issue that I am having and
hopefully someone can shed some light on it:

I have three modules that a comprising the problem:
./core.py
./log.py
./resources/simple/__init__.py

core.py looks something like this (simplified version):

import log
class Core:
	def __init__ (self):
		self.logger = log.Logger ("core", log.ERROR,
"/home/logs/log") 
		try:
			module = __import__ ("resources.simple",globals
(), locals (), ["simple"]) 
		except ImportError:
			print "Error importing"

		self.rs = module.Resource ()

resources/simple/__init__.py look like this (again, simplified version):

import log
class Resource:
	def __init__ (self):
		self.logger = log.Logger ("resource", log.ERROR)

and finally, log.py:

import logging

global_info = [None, None, None]

def Logger (name, level, filename=None):
	global global_info
	print global_info
	if not global_info[0] and not global_info[1]:
		global_info[0] = name
		global_info[1] = level
		global_info[2] = filename

		logging.basicConfig (level, format=...)
	else:
		if filename:
			print "ERROR: logger already initialized"

	return logging.getLogger (name)

The problem that I am seeing is that 'global_info' in the log.py module
is [None, None, None] on both calls of log.Logger (), even though the
initial call (from core.py) sets it to the passed in values.

According to the Python documentation, I am using the __import__
statement correctly to get what I want? It seems like, the guts of the
import/__import__ code are creating two different namespaces for the
log.py module.

 (if you are wondering why I am using __import__ in my class
constructor, it is because the name of the module that should be
imported is read out of a configuration file).

Could someone help with what could be going wrong here?
-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com

==========================================
 Professor: Some say I'm robbing the cradle but I say she's robbing the
grave.


From shawn.mcgrath at gmail.com  Mon Mar 19 10:01:56 2007
From: shawn.mcgrath at gmail.com (Shawn  McGrath)
Date: 19 Mar 2007 07:01:56 -0700
Subject: Boost Python properties/getter functions for strings
Message-ID: <1174312916.127830.303550@o5g2000hsb.googlegroups.com>

Hi, I'm trying to expose a C++ class' internals to python via
boost::python.  I can do integer/boolean functions fine, but as soon
as I do a string get/set it craps out.

boost::python::class_<Entity, std::auto_ptr<pyEntity> >("Entity")
		//publics
			.def("isActive", &Entity::isActive) //bool
			.def("activate", &Entity::activate) //bool
			.def("deactivate", &Entity::deactivate) //bool
			//...
			.add_property("name", &Entity::getName) //compile error (1)
			.def("getName", &Entity::getName,
				boost::python::return_internal_reference<>()); //runtime error(2)


Compile error (1) shows this: C:/MinGW/include/boost/python/detail/
invoke.hpp: In function `PyObject*
boost::python::detail::invoke(boost::python::detail::invoke_tag_<
false,  true>, const RC&, F&, TC&) [with RC =
boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<const
std::string&>, F = const std::string&(rsblsb::Entity::*)() const, TC =
boost::python::arg_from_python<rsblsb::Entity&>]':
C:/MinGW/include/boost/python/detail/caller.hpp:199:   instantiated
from `PyObject* boost::python::detail::caller_arity<1u>::impl<F,
Policies, Sig>::operator()(PyObject*, PyObject*) [with F = const
std::string&(rsblsb::Entity::*)() const, Policies =
boost::python::default_call_policies, Sig = boost::mpl::vector2<const
std::string&, rsblsb::Entity&>]'
C:/MinGW/include/boost/python/object/py_function.hpp:38:
instantiated from `PyObject*
boost::python::objects::caller_py_function_impl<Caller>::operator()
(PyObject*, PyObject*) [with Caller =
boost::python::detail::caller<const std::string&(rsblsb::Entity::*)()
const, boost::python::default_call_policies, boost::mpl::vector2<const
std::string&, rsblsb::Entity&> >]'
C:\Game\svn\Platform\Framework\Python\PyModuleSetup.cc:58:
instantiated from here
C:/MinGW/include/boost/python/detail/invoke.hpp:88: error: no match
for call to `(const
boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<const
std::string&>) (const std::basic_string<char, std::char_traits<char>,
std::allocator<char> >&)'

Runtime error 2 just crashes whenever I try:
import modulename
I = modulename.Entity()
I.getName()

Anyone have any idea what I can try? thanks a lot!

-Shawn.



From moonquelle at gmail.com  Thu Mar 15 02:41:28 2007
From: moonquelle at gmail.com (=?UTF-8?Q?P=C4=B1nar_Yanarda=C4=9F?=)
Date: Thu, 15 Mar 2007 08:41:28 +0200
Subject: looking for a simple crypto library
Message-ID: <c5dbda760703142341k3b4e9a01lff33bf66d5ad9dac@mail.gmail.com>

 Hi all,

I'm looking for a crypto library which can simply:

- extracts a public key from a (X.509) certificate,

- supports public-key algorithms.

Any suggestions?

With love,
-- 
P?nar "PINguAR" Yanarda?
http://pinguar.org
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From jeff at jmcneil.net  Thu Mar  1 13:43:55 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 1 Mar 2007 13:43:55 -0500
Subject: Implementing a cache?
Message-ID: <82d28c40703011043l232fc7cen21735c6f6ff0acf0@mail.gmail.com>

I've got a question regarding the implementation of a caching system that
I'm porting over from C.

I have multiple processes across an array of systems that must retrieve data
from a central database at a fairly high rate.  The current system uses
shared memory and supports expiry after a configurable time limit, negative
caching, and intent-to-write locking.  Each process attaches to a shared
memory segment that serves as a local cache for that system. My first notion
was to implement memcached but I'm running in a shared environment and
memcached does not provide for any type of authentication mechanism.

>From what I understand, my other options would be mmap, or to go with one of
the Python IPC modules (though it appears most of those packages are listed
in an Alpha/Beta state).

Is there a better way to implement such an animal in Python?  I feel like
I'm trying to reimplement something that probably already exists.

Thanks

Jeff
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From joshbloom at gmail.com  Tue Mar 20 13:23:42 2007
From: joshbloom at gmail.com (Josh Bloom)
Date: Tue, 20 Mar 2007 10:23:42 -0700
Subject: List to string
In-Reply-To: <pan.2007.03.20.12.35.38.787611@REMOVE.THIS.cybersource.com.au>
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
	<1174192714.014092.79380@l77g2000hsb.googlegroups.com>
	<45fe7ddc$0$25292$426a34cc@news.free.fr>
	<pan.2007.03.20.03.41.19.501610@REMOVE.THIS.cybersource.com.au>
	<45ffcd12$0$18276$426a74cc@news.free.fr>
	<pan.2007.03.20.12.35.38.787611@REMOVE.THIS.cybersource.com.au>
Message-ID: <d25b6e9a0703201023x2524e005x654c7432f0178f73@mail.gmail.com>

That's pretty funny :)

On 3/20/07, Steven D'Aprano <steve at remove.this.cybersource.com.au> wrote:
>
> On Tue, 20 Mar 2007 13:01:36 +0100, Bruno Desthuilliers wrote:
>
> > Steven D'Aprano a ?crit :
> >> On Mon, 19 Mar 2007 13:11:09 +0100, Bruno Desthuilliers wrote:
> >>
> >>> There's no "cast" in Python. It would make no sens in a dynamically
> >>> typed language, where type informations belong to the LHS of a
> binding,
> >>> not the RHS.
> >>
> >> Surely you have left and right mixed up?
> >
> > (rereading)
> > (ashamed)
> > Obviously, yes.
> > Thanks for the correction.
>
> That's okay, I have a big "L" and "R" written on the bottom of my shoes.
> Of course, they didn't do me any good until I got a "L" and "R" tattooed
> on my feet.
>
>
>
> --
> Steven.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From steven.bethard at gmail.com  Sun Mar 25 17:09:02 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 25 Mar 2007 15:09:02 -0600
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174854156.298431.68150@n59g2000hsh.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
	<1174854156.298431.68150@n59g2000hsh.googlegroups.com>
Message-ID: <XcOdnTRJmdpteZvbnZ2dnUVZ_qSrnZ2d@comcast.com>

On Mar 25, 9:13 am, "7stud" <bbxx789_0... at yahoo.com> wrote:
 > Is there some other way to retrieve a user-defined function object
 > from a class other than using the class name or an instance?

On Mar 25, 3:00 am, irs... at gmail.com wrote:
 > What Steven B. already said, MyClass.__dict__['someFunc'], is a
 > different way than MyClass.someFunc that produces different results.

7stud wrote:
> That doesn't seem to fit what GvR was talking about.  From this
> example:
> 
> class Test(object):
>         def greet():
>                 print "Hello"
> 
> methObj = Test.__dict__["greet"]
> print methObj.im_self
> 
> I get this output:
> 
> Traceback (most recent call last):
>   File "test1.py", line 7, in ?
>     print methObj.im_self
> AttributeError: 'function' object has no attribute 'im_self'


Yep.  The thing in the class __dict__ is the original *function*. The 
thing you get from something like ``Test.greet`` is the *method*. 
Here's another way of looking at it::

     >>> class Test(object):
     ...     pass
     ...
     >>> def greet():
     ...     print 'Hello'
     ...
     >>> greet
     <function greet at 0x00E718B0>
     >>> Test.greet = greet
     >>> Test.__dict__['greet']
     <function greet at 0x00E718B0>
     >>> Test.__dict__['greet'] is greet
     True

Note that ``Test.__dict__['greet']`` is the ``greet`` *function*, not 
some wrapper of that function. When you access the class attribute 
normally, Python creates an 'unbound method' object::

     >>> Test.greet
     <unbound method Test.greet>
     >>> Test.greet is greet
     False
     >>> Test.greet.im_func
     <function greet at 0x00E718B0>
     >>> Test.greet.im_func is greet
     True

See that ``Test.greet`` gives you an 'unbound method' object which just 
wraps the real 'function' object (which is stored as the 'im_func' 
attribute)?  That's because under the covers, classes are actually using 
doing something like this::

     >>> Test.__dict__['greet'].__get__(None, Test)
     <unbound method Test.greet>
     >>> Test.greet == Test.__dict__['greet'].__get__(None, Test)
     True

So if you want to get a method from a function, you can always do that 
manually yourself::

     >>> greet.__get__(None, Test)
     <unbound method Test.greet>

Hope that helps,

STeVe


From heikki at osafoundation.org  Fri Mar 30 01:53:09 2007
From: heikki at osafoundation.org (Heikki Toivonen)
Date: Thu, 29 Mar 2007 22:53:09 -0700
Subject: Python 2.5 fails where 2.4 works when running external program
Message-ID: <Ft6dnSSOy5taOJHbnZ2dnUVZ_uednZ2d@comcast.com>

We have successfully used a script to run external programs for several
years. Now we upgraded our Python to 2.5, and are hitting a mysterious
error.

The expected output from the sample script (see below) with 2.4 looks
like this:

ret ['5\n']
else
********************
ExternalCommandErrorWithOutputList 1 ['Traceback (most recent call
last):\n', '  File "<string>", line 1, in ?\n', 'ZeroDivisionError:
integer division or modulo by zero\n']
********************
ret ['6\n', '7\n', '8\n']
else
********************

With 2.5 we get:

ret ['5\n']
else
********************
Exception 'int' object is not iterable
Traceback (most recent call last):
  File "...test.py", line 43, in <module>
    ret = executeCommandReturnOutput(cmd)
  File "...test.py", line 6, in __init__
    self.args = args[0]
TypeError: 'int' object is not iterable

********************
ret ['6\n', '7\n', '8\n']
else
********************

What is going on? How do we fix this? We'd like to be able to run with
both python 2.4 and 2.5.

And here is the script:

---CLIP---
import os, traceback, sys

class ExternalCommandErrorWithOutputList(Exception):
    def __init__(self,args=None):
        if args:
            self.args = args[0]
            self.outputList = args[1]
        else:
            self.args = args
            self.outputList = []


def executeCommandReturnOutput(args):
    args_str = ' '.join(args)

    if os.name not in ['nt', 'os2']:
        import popen2
        p = popen2.Popen4(args_str)
        p.tochild.close()
        outputList = p.fromchild.readlines()
        exitCode = p.wait()
        if exitCode == 0:
            exitCode = None
        else:
            exitCode >>= 8
    else:
        i,k = os.popen4(args_str)
        i.close()
        outputList = k.readlines()
        exitCode = k.close()

    if exitCode is not None:
        raise ExternalCommandErrorWithOutputList, [exitCode, outputList]

    return outputList


if __name__ == "__main__":
    for cmd in [['python', '-c', '"print 5"'],
                ['python', '-c', '"1/0"'],
                ['python', '-c', '"print 6;import
sys;sys.stdout.flush();print >>sys.stderr, 7;print 8"'],
                ]:
        try:
            ret = executeCommandReturnOutput(cmd)
            print 'ret', ret
        except ExternalCommandErrorWithOutputList, e:
            print 'ExternalCommandErrorWithOutputList', e, e.outputList
        except Exception, e:
            print 'Exception', e
            type, value, stack = sys.exc_info()
            print ''.join(traceback.format_exception(type, value, stack))
        except:
            print 'except'
            type, value, stack = sys.exc_info()
            print ''.join(traceback.format_exception(type, value, stack))
        else:
            print 'else'
        print '*' * 20
---CLIP---

-- 
  Heikki Toivonen


From bytecolor at yahoo.com  Tue Mar  6 01:43:15 2007
From: bytecolor at yahoo.com (bytecolor)
Date: 5 Mar 2007 22:43:15 -0800
Subject: package_data question
In-Reply-To: <1173127941.717284.116010@q40g2000cwq.googlegroups.com>
References: <1173077773.569831.249980@t69g2000cwt.googlegroups.com>
	<1173127941.717284.116010@q40g2000cwq.googlegroups.com>
Message-ID: <1173163395.758951.196840@h3g2000cwc.googlegroups.com>

On Mar 5, 3:52 pm, "Goldfish" <gregt... at mindspring.com> wrote:
> On Mar 5, 1:56 am, "bytecolor" <byteco... at yahoo.com> wrote:

> I have a package along with a samples section. I have both a setup.py
> script along with a MANIFEST.in file to make sure everything gets in.
> You can see both of the files athttps://springpython.python-hosting.com/browser/trunk/samples

http://tinyurl.com/yo3qqo

>
> That is for the samples section. For my main package, I have something
> similar athttps://springpython.python-hosting.com/browser/trunk/src



From tinaweb at bestemselv.com  Wed Mar  7 07:30:04 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Wed, 07 Mar 2007 13:30:04 +0100
Subject: PyQt4: Clickable links in QLabel?
In-Reply-To: <4a83c$45ecc377$54d1d767$29004@news.chello.no>
References: <XaydncLKqZaMFXvYRVnzvA@telenor.com>
	<4a83c$45ecc377$54d1d767$29004@news.chello.no>
Message-ID: <YKidnWxDTvXQLXPYRVnzvQ@telenor.com>

David Boddie wrote:
> On Thursday 01 March 2007 09:00, Tina I wrote:
> 
>> A short and sweet question: Is it possible to put a clickable link in a
>> QLabel that will open in the systems default browser?
> 
> Yes.
> 
>> I tried to put in some HTML but it did (of course?) simply display the
>> code instead of a link. I also tried to set openExternalLinks 'true' but
>> then pyuic4 bombed.
> 
> Well, that shouldn't happen. :-(
> 
> Can you send a bug report to the PyQt mailing list (assuming you're
> subscribed to it) with the error message or backtrace that you get
> when this happens?
> 
>> I see that QLabel does not have a html text format but I'm still hoping
>> it's possible. I really need a link on my main window form.
> 
> If you enclose the HTML with <qt> and </qt> tags, the HTML should be
> displayed properly. Any other matching tags should also work, so you
> could use <p> and </p> if you want.
> 
> Setting the label's openExternalLinks property to True should then
> enable what you want. You can try this out by previewing the form in
> Qt Designer.
> 
> David
Thanks David,

This is embarrassing... but my PyQt4 was too old *blush*
I can't believe I didn't think of double checking what version I had 
installed. A swift upgrade and it works like a charm :)

Tina


From laurent.pointal at wanadoo.fr  Sat Mar 31 10:43:55 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 31 Mar 2007 16:43:55 +0200
Subject: Newbie Question (real-time communication between apps: audio, 3d,
	PD, Blender)
References: <1175294306.124030.272350@l77g2000hsb.googlegroups.com>
Message-ID: <460e7283$0$27377$ba4acef3@news.orange.fr>

gregorywieber at gmail.com wrote:

> Hi All,
> 
> I'm just beginning my exploration of Python and I have a rather
> general question. If two particular programs have Python scripting
> capabilities, does that mean those two programs can communicate in
> real time through Python?
> 
> I'm running some audio experiments (for artistic purposes) in the
> program Pure Data (PD). I would like to use data that I extract from
> audio files to affect 3-d game simulations in Blender.  I don't know
> specifically what it is I would be manipulating -- this is an artistic
> project, so intend to do a lot of experimenting to see what I come up
> with...
> 
> My question(s): Is this possible, reasonable, plausible?

Plausible, with a recent PC.

I use some Java code + a research TTS engine (C) + Python code + Pure Data +
VirChor (3D renderer+interract, C++) in a TalkingHead project at LIMSI.
All these communicate via UDP, we just tries to keep amount of transmitted
data not too huge (ie. just transmit status, positions, commands...).
For the realtime side capacity, it depend on the process you need in
Python - if Python reveal to be too slow, you may write long computing code
into a separate C module or library (may see ctypes and pyrex). 
Another point, if you build Python multithreading code in same process, the
Global Lock may lead to unefficient use of your computing capacities.

Note. You may take a look at OSC (Open Sound Control), there is a module for
PD and one for Python.

A+

Laurent.



From kevinliu23 at gmail.com  Thu Mar 29 13:30:03 2007
From: kevinliu23 at gmail.com (kevinliu23)
Date: 29 Mar 2007 10:30:03 -0700
Subject: Best way to wait for string input
Message-ID: <1175189403.036584.239880@o5g2000hsb.googlegroups.com>

Hi guys,

Python newbie here for some expert help. So basically I want to design
a menu system that waits for a string input. I'm not sure what the
best way of going about this is. The current system waits for a single
character input using msvcrt.kbhit( ) and msvcrt.getch( ). Is there
something equivalent to wait for string inputs?



From michael at jedimindworks.com  Sat Mar 24 22:40:57 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sat, 24 Mar 2007 21:40:57 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174762060.432122.203930@n59g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<56l7m1F29kgs9U1@mid.uni-berlin.de>
	<1174762060.432122.203930@n59g2000hsh.googlegroups.com>
Message-ID: <C05B0F71-4BBF-4458-82CB-5326997F6CB4@jedimindworks.com>

> No, the OSX version is like 2.3 something. I installed the 2.4.4
> version in /usr/local bypassing the Apple stuff.

Oh!  Well then:

---[cut here]---
# danger will robinson -- use at your own risk ;-)
rm /usr/local/bin/python*
rm -rf /usr/local/lib/python
---[snip]---

Is the uninstall program :-)



From psaroudakis at gmail.com  Tue Mar 27 08:03:05 2007
From: psaroudakis at gmail.com (psaroudakis at gmail.com)
Date: 27 Mar 2007 05:03:05 -0700
Subject: correction : Re: pygtk button event
In-Reply-To: <1174996724.249456.308140@r56g2000hsd.googlegroups.com>
References: <1174996724.249456.308140@r56g2000hsd.googlegroups.com>
Message-ID: <1174996985.288917.73080@e65g2000hsc.googlegroups.com>

Oups a small mistake:

bt=application.get_widget('button1')

psaroudakis at gmail.com wrote:
> Hi....
>
>
> i am trying to implement the following:
>
> I want to be able to press a button, perform a task and return a
> value.
>
> my button is named button1 and I used glade to build the gui.
>
> so, something like this should work....
>
>
> application=gtk.glade.XML('app.glade','app')
> bt=app.get_widget('button1')
> bt.connect('clicked',on_btClicked)
> def on_btClicked(widget,event):
>       if data==0:
>          P=1
>       else:
>          P=2
>       return P
>
> How can I get P?
>
> Something like this doesn't work:
>
> bt.connect('clicked',P=on_btClicked)
>
> How can I return P???
>
>
> Thanks!
>
> Nick



From rrs at researchut.com  Fri Mar 16 18:08:14 2007
From: rrs at researchut.com (Ritesh Raj Sarraf)
Date: Sat, 17 Mar 2007 03:38:14 +0530
Subject: lock problem
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
	<mailman.5170.1174032315.32031.python-list@python.org>
	<1174034766.213528.164170@e65g2000hsc.googlegroups.com>
Message-ID: <e3hrc4-1f7.ln1@www.researchut.com>

Leo Kislov wrote:

> But you miss the fact that there is only one environment per process.

Maybe there's a confusion.
The environment variable that I'm setting has noting to do with ldapsearch. I
use the environment variable as a filename to which ldapsearch can redirect its
output. And that I do is because the output can be huge and useless.
Then I do some pattern matching on that file and filter my data and then delete
it.

If you think I still am missing something important, request you to describe it.

Thanks,
Ritesh
-- 
Ritesh Raj Sarraf
RESEARCHUT - http://www.researchut.com
"Necessity is the mother of invention."
"Stealing logic from one person is plagiarism, stealing from many is research."
"The great are those who achieve the impossible, the petty are those who
cannot - rrs"



From codecraig at gmail.com  Tue Mar 20 08:32:57 2007
From: codecraig at gmail.com (abcd)
Date: 20 Mar 2007 05:32:57 -0700
Subject: Load three different modules which have the same name
In-Reply-To: <mailman.5333.1174391092.32031.python-list@python.org>
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
	<mailman.5333.1174391092.32031.python-list@python.org>
Message-ID: <1174393977.455746.7280@o5g2000hsb.googlegroups.com>

thanks for the help.



From ckkart at hoc.net  Wed Mar 28 06:55:21 2007
From: ckkart at hoc.net (Christian)
Date: Wed, 28 Mar 2007 19:55:21 +0900
Subject: wxPython, Syntax highlighting
In-Reply-To: <1175064996.150578.300170@l77g2000hsb.googlegroups.com>
References: <1175064996.150578.300170@l77g2000hsb.googlegroups.com>
Message-ID: <eudhio$qfe$3@sea.gmane.org>

Eric von Horst wrote:
> Hi,
> 
> I am looking for wx widget that has the ability to show text, edit the
> text (like a TextCtrl) but also does syntax highlighting (if the text
> is e.g. XML or HTML).
> I have been looking in the latest wxPython version but I could not
> really find anything.

Have a look at StyledTextControl (wx.stc) in the demo.

Christian



From seppl43 at southstore.de  Fri Mar 30 05:56:28 2007
From: seppl43 at southstore.de (seppl43)
Date: 30 Mar 2007 02:56:28 -0700
Subject: How to get the demension of a video file?
Message-ID: <1175248588.710143.313090@o5g2000hsb.googlegroups.com>

Hello there,

does anybody know, how to get the dimension values (width/height) of a
quicktime (.mov) and/or a avi-file?
Is there perhaps a module which can do this job?

Thank you for tips.

seppl



From deets at nospam.web.de  Thu Mar  1 17:58:57 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 01 Mar 2007 23:58:57 +0100
Subject: design question: no new attributes
In-Reply-To: <61IFh.7997$KE2.5053@trnddc06>
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05><mailman.4475.1172614860.32031.python-list@python.org><3c5Fh.3664$Tg7.2156@trnddc03>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08>
	<45e60fdc$0$30655$426a34cc@news.free.fr>
	<xgBFh.4185$854.1692@trnddc04>
	<45e7438f$0$29410$426a74cc@news.free.fr>
	<61IFh.7997$KE2.5053@trnddc06>
Message-ID: <54p46cF21nj1dU1@mid.uni-berlin.de>

> 
> One last point. While I remain interested in examples of how
> "late" addition of attributes to class instances is useful,
> I must note that everyone who responded agreed that it
> has been a source of bugs.  This seems to argue against a
> general ban on "locking" objects in some way, in some
> circumstances.


I've got some examples. I quite often used dynamic attributes in 
situations where I wasn't the creator of certain objects, but had to use 
them and wanted to link them with my own code.

For example, in various GUI-environments, you've got some sort of tree 
view, usually containing item-objects that form the tree.

Now in other languages like C++ or Java, I have to subclass those items 
(if possible at all) if I want to associate my own data (for example the 
"real" object behind such an item) with them. Or I need to have an 
awkward global mapping between tree-items and my data.

But in python, I can just easily add a new .data_object property, and in 
whatever event-handler spits a e.g. selected item at me, I'm easily 
accessing the data behind it.

Other examples are processing XML-trees that also have associated data 
and the like.

Diez


From gerrit.muller at embeddedsystems.nl  Fri Mar 23 11:11:49 2007
From: gerrit.muller at embeddedsystems.nl (Gerrit Muller)
Date: Fri, 23 Mar 2007 16:11:49 +0100
Subject: Mocking OpenOffice in python?
In-Reply-To: <45f7be02$0$27406$ba4acef3@news.orange.fr>
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
	<45f7be02$0$27406$ba4acef3@news.orange.fr>
Message-ID: <4603EE35.3010903@embeddedsystems.nl>

M?ta-MCI schreef:
> Hi!
> 
> 
> Under windows, I drive OOo, from Python, via COM/OLE-automation.
> 
> It's run OK, but some bugs, in the OOo-COM-Python, had stop my 
> devloppements...
> 
> However, this way is usable (only on Win, ok?)
> 
Do you have some (small) example program of using OOo from Python via 
COM/OLE?

Can you give any indication of the kind of bugs that you hit?

kind regards, Gerrit Muller

Gaudi Systems Architecting <www.gaudisite.nl>


From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 18:18:04 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 00:18:04 +0100
Subject: Best place for a function?
In-Reply-To: <mailman.4775.1173306427.32031.python-list@python.org>
References: <mailman.4775.1173306427.32031.python-list@python.org>
Message-ID: <45ef4028$0$29399$426a74cc@news.free.fr>

Sergio Correia a ?crit :
> I'm writing a class, where one of the methods is kinda complex. The
> method uses a function which I know for certain will not be used
> anywhere else. This function does not require anything from self, only
> the args passed by the method.
> 
> Where should I put the function?

Somewhere in your module ?-)

(snip)

If your problem is to reduce the apparent complexity of the method, 
defining the function inside the method won't help that much (unless the 
function by itself is short enough - and event then...). Apart from 
having a direct access to the method's namespace, you don't gain much by 
doing so. And if it's a an implementation function that doesn't need to 
access the instance, it has no reason to be a method. Moreover, since 
it's not part of neither the class or the module interface, you can 
freely change your mind if and when you find a need to do so.


From mail at timgolden.me.uk  Thu Mar  1 04:17:58 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 01 Mar 2007 09:17:58 +0000
Subject: How to check for remaining hard drive space in Windows?
In-Reply-To: <1172699693.411268.153760@j27g2000cwj.googlegroups.com>
References: <1172694391.256770.234450@j27g2000cwj.googlegroups.com>	<2adc542f0702281259q3ab2ac1dr8e76e6157f96537b@mail.gmail.com>	<mailman.4531.1172697404.32031.python-list@python.org>	<1172697850.946627.196420@a75g2000cwd.googlegroups.com>
	<1172699693.411268.153760@j27g2000cwj.googlegroups.com>
Message-ID: <45E69A46.3040002@timgolden.me.uk>

kevinliu23 wrote:
> Just tried your solution Tim, worked like a charm. :)
> 
> It's great because I don't even have to worry about the computer name.
> A question regarding the rootPath parameter...how would I be passing
> it? Would I be passing it as...
> 
>    tuple = win32api.GetDiskFreeSpace(r'C:')
> or just leave it blank and the function will automatically use the
> rootPath of where the .py file resides?
> 
> Both have returned the correct result.

The simple answer is: I'm not sure. If you experiment and find
something which works, just use it!

Something which SickMonkey made me return to your question.
Are you trying to find the disk space available on a
different machine (possibly on several different machines)?
If so, then WMI is definitely your answer. You can
run -- from your machine -- one piece of code which
will attach to several different machines to give
you the answer. (as per Sick Monkey's later post).

If I've read too much into your question, well nothing's
ever wasted on the internet. Here's some sample code
which uses the wmi module from:

   http://timgolden.me.uk/python/wmi.html

<code>
machines = ['mycomp', 'othercomp']

for machine in machines:
   print "Machine:", machine
   c = wmi.WMI (machine)
   # only consider local fixed disks
   for disk in c.Win32_LogicalDisk (DriveType=3):
     print disk.Name, disk.FreeSpace
   print

</code>

Yes, you could even write:

   for disk in wmi.WMI (machine).Win32_LogicaDisk (DriveType=3):

but I'd find it a touch unwieldy. YMMV.

HTH
TJG


From paul at subsignal.org  Wed Mar 21 13:45:01 2007
From: paul at subsignal.org (paul)
Date: Wed, 21 Mar 2007 18:45:01 +0100
Subject: Delete a function
In-Reply-To: <1174496687.142300.205350@n76g2000hsh.googlegroups.com>
References: <1174494159.024910.151540@l75g2000hse.googlegroups.com>	<mailman.5405.1174495228.32031.python-list@python.org>
	<1174496687.142300.205350@n76g2000hsh.googlegroups.com>
Message-ID: <etrqur$luj$1@sea.gmane.org>

gtb schrieb:
> On Mar 21, 11:37 am, Steve Holden <s... at holdenweb.com> wrote:
>> gtb wrote:
>>> After a function has been imported to a shell how may it be deleted so
>>> that after editing it can reloaded anew?
>> Use the built-in reload() function to reload the module that defines the
>> function.
> Thanks, tried that now and get nameError: with the following.
> 
> import sys
> sys.path.append("c:\maxq\testScripts")
> 
> from CompactTest import CompactTest
> from compactLogin import dvlogin
> 
> reload(compactLogin)
you haven't imported compactLogin but dvlogin from the compactLogin
namespace. Try:

import compactLogin
...do something with compactLogin.dvlogin...

reload(compactLogin)

cheers
 Paul



From nagle at animats.com  Wed Mar  7 17:36:25 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 07 Mar 2007 14:36:25 -0800
Subject: More M2Crypto build problems
In-Reply-To: <xhFHh.5582$M65.3354@newssvr21.news.prodigy.net>
References: <xhFHh.5582$M65.3354@newssvr21.news.prodigy.net>
Message-ID: <45EF3E69.8040609@animats.com>

    Still more M2Crypto build problems:

In M2Crypto's file "SWIG/_ec.i", there's this:

#if OPENSSL_VERSION_NUMBER < 0x0090800fL || defined(OPENSSL_NO_EC)
#undef OPENSSL_NO_EC
%constant OPENSSL_NO_EC = 1;
#else
%constant OPENSSL_NO_EC = 0;

%{
#include <openssl/bn.h>
#include <openssl/err.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/ecdsa.h>
#include <openssl/ecdh.h>
%}

There's the assumption here that versions of OpenSSL greater than 0.9.08???
contain elliptical curve cryptography support.  There's
also the assumption that "ecdsa.h" is present; it is included
unconditionally, and definitions from it are used later.

Unfortunately, the ones that ship with Fedora Core 5 and 6 do not have it:

http://threebit.net/mail-archive/fedora-list/msg14507.html

Updating with "yum" doesn't help.  Apparently there are patent problems
with the algorithm, and Red Hat pulled that code.  See

http://en.wikipedia.org/wiki/ECC_patents

I'm trying to get M2Crypto to build without elliptical cryptography, but
it's not working

					John Nagle

"Python.  Embrace the pain".


From nogradi at gmail.com  Sat Mar 24 03:38:27 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 24 Mar 2007 08:38:27 +0100
Subject: On text processing
In-Reply-To: <1174697037.391554.4690@l77g2000hsb.googlegroups.com>
References: <mailman.5535.1174689003.32031.python-list@python.org>
	<1174697037.391554.4690@l77g2000hsb.googlegroups.com>
Message-ID: <5f56302b0703240038p5173a37fu6acda795d9fa762d@mail.gmail.com>

> > I'm in a process of rewriting a bash/awk/sed script -- that grew to
> > big -- in python. I can rewrite it in a simple line-by-line way but
> > that results in ugly python code and I'm sure there is a simple
> > pythonic way.
> >
> > The bash script processed text files of the form:
> >
> > ###############################
> > key1    value1
> > key2    value2
> > key3    value3
> >
> > key4    value4
> > spec11  spec12   spec13   spec14
> > spec21  spec22   spec23   spec24
> > spec31  spec32   spec33   spec34
> >
> > key5    value5
> > key6    value6
> >
> > key7    value7
> > more11   more12   more13
> > more21   more22   more23
> >
> > key8    value8
> > ###################################
> >
> > I guess you get the point. If a line has two entries it is a key/value
> > pair which should end up in a dictionary. If a key/value pair is
> > followed by consequtive lines with more then two entries, it is a
> > matrix that should end up in a list of lists (matrix) that can be
> > identified by the key preceeding it. The empty line after the last
> > line of a matrix signifies that the matrix is finished and we are back
> > to a key/value situation. Note that a matrix is always preceeded by a
> > key/value pair so that it can really be identified by the key.
> >
> > Any elegant solution for this?
>
>
> My solution expects correctly formatted input and parses it into
> separate key/value and matrix holding dicts:
>
>
> from StringIO import StringIO
>
> fileText = '''\
>  key1    value1
> key2    value2
> key3    value3
>
> key4    value4
> spec11  spec12   spec13   spec14
> spec21  spec22   spec23   spec24
> spec31  spec32   spec33   spec34
>
> key5    value5
> key6    value6
>
> key7    value7
> more11   more12   more13
> more21   more22   more23
>
> key8    value8
> '''
> infile = StringIO(fileText)
>
> keyvalues = {}
> matrices  = {}
> for line in infile:
>     fields = line.strip().split()
>     if len(fields) == 2:
>         keyvalues[fields[0]] = fields[1]
>         lastkey = fields[0]
>     elif fields:
>         matrices.setdefault(lastkey, []).append(fields)
>
> ==============
> Here is the sample output:
>
> >>> from pprint import pprint as pp
> >>> pp(keyvalues)
> {'key1': 'value1',
>  'key2': 'value2',
>  'key3': 'value3',
>  'key4': 'value4',
>  'key5': 'value5',
>  'key6': 'value6',
>  'key7': 'value7',
>  'key8': 'value8'}
> >>> pp(matrices)
> {'key4': [['spec11', 'spec12', 'spec13', 'spec14'],
>           ['spec21', 'spec22', 'spec23', 'spec24'],
>           ['spec31', 'spec32', 'spec33', 'spec34']],
>  'key7': [['more11', 'more12', 'more13'], ['more21', 'more22',
> 'more23']]}
> >>>

Paddy, thanks, this looks even better.
Paul, pyparsing looks like an overkill, even the config parser module
is something that is too complex for me for such a simple task. The
text files are actually input files to a program and will never be
longer than 20-30 lines so Paddy's solution is perfectly fine. In any
case it's good to know that there exists a module called pyparsing :)


From adonis at REMOVETHISearthlink.net  Thu Mar  1 12:20:20 2007
From: adonis at REMOVETHISearthlink.net (Adonis Vargas)
Date: Thu, 01 Mar 2007 17:20:20 GMT
Subject: New to Tkinter GUI building
In-Reply-To: <1172701393.612661.193690@m58g2000cwm.googlegroups.com>
References: <1172695675.279652.98920@a75g2000cwd.googlegroups.com>
	<CfmFh.6986$_73.1105@newsread2.news.pas.earthlink.net>
	<1172701393.612661.193690@m58g2000cwm.googlegroups.com>
Message-ID: <oXDFh.7737$tD2.2742@newsread1.news.pas.earthlink.net>

Adam wrote:
> On Feb 28, 9:13 pm, Adonis Vargas <ado... at REMOVETHISearthlink.net>
> wrote:
>> Adam wrote:
>>
>> <snip>
>>
>>> I think my main questions are:
>>> 1. How can I get the Window to be sized the way I want it?
>>> 2. How can I get the Scrollbars to fill the side of the text box
>>> instead of being small? (like .pack(fill= tk.Y)
>> <snip>
>>
>>> I have only posted the code relevant to the GUI.
>>> TIA
>>> Adam
>> To size the window use Tk's geometry method
>>
>>      self.top.geometry("%dx%d%+d%+d" % (800, 600, 0, 0)) # (width,
>> height, x, y)
>>
>> For the scrollbar to fill vertically, use the sticky grid option.
>>
>>      self.scrlr1.grid(row=0, column=1, sticky=tk.N + tk.S)
>>
>> Hope this helps.
>>
>> Adonis
> 
> Can't test now as its late in th UK and I'm going to bed. Looks good
> though.
> So remove the size from the frames etc and use the geometry method
> instead? Then use grid to "pack" them for want of a better word?
> 

No, the geometry method is used to set the size of your main application 
window. This is what I understood from your first question, and please 
correct me if I am wrong. The grid method (or the pack method) are used 
to layout the widgets.

In other words, after line 8 of the code you provided you would add this 
line:

     self.top.geometry("%dx%d%+d%+d" % (800, 600, 0, 0))

Hope this helps.

Adonis


From mfmorss at aep.com  Tue Mar 27 14:10:05 2007
From: mfmorss at aep.com (Mark Morss)
Date: 27 Mar 2007 11:10:05 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <eubi9o$o1e$1@news1.zwoll1.ov.home.nl>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
	<1175005457.115349.92940@p15g2000hsd.googlegroups.com>
	<eubi9o$o1e$1@news1.zwoll1.ov.home.nl>
Message-ID: <1175019004.956719.185810@p77g2000hsh.googlegroups.com>

On Mar 27, 12:55 pm, Jaap Spies <j.sp... at hccnet.nl> wrote:
> Mark Morss wrote:
>
> > Maybe somebody reading this will be able to convince me to look again
> > at Numpy/Scipy, but for the time being I will continue to do my
> > serious numerical computation in Fortran.
>
> What I am missing in this discussion is a link to Pyrex to speed up
> Python: Pyrex is almost Python with the speed of compiled C.http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/
>
> Pyrex is adapted in SAGE (Software for Algebra and Geometry
> Experimentation) as Sagex:http://modular.math.washington.edu/sage/
>
> Jaap

Well, the discussion was about Python vs. Fortran, and Pyrex, as I
understand it, is a tool for linking C to Python.  So I am not sure of
the relevance of Pyrex to this particular discussion.  F2PY is the
leading tool for linking Fortran to Python, and I did mention that.



From gerard.blais at gmail.com  Tue Mar 20 19:47:22 2007
From: gerard.blais at gmail.com (Gerry)
Date: 20 Mar 2007 16:47:22 -0700
Subject: mysterious unicode
In-Reply-To: <mailman.5357.1174433396.32031.python-list@python.org>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<mailman.5357.1174433396.32031.python-list@python.org>
Message-ID: <1174434442.142511.37240@p15g2000hsd.googlegroups.com>

On Mar 20, 7:29 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 20 Mar 2007 19:35:00 -0300, Gerry <gerard.bl... at gmail.com>
> escribi?:
>
Thanks! - that helps a lot.

I'm still mystified why:
   qno was ever unicode, and why
   qno.encode("ascii", "replace") is still unicode.

Gerry




>
>
> py> qno = u"Q1"
> py> qno
> u'Q1'
> py> print qno
> Q1
> py> print (qno,2)
> (u'Q1', 2)
>
> --
> Gabriel Genellina






From john106henry at hotmail.com  Mon Mar 19 16:15:40 2007
From: john106henry at hotmail.com (John Henry)
Date: 19 Mar 2007 13:15:40 -0700
Subject: PythonCard thoughts
In-Reply-To: <1174332094.908333.173920@l75g2000hse.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
	<1174329032.236378.161150@e65g2000hsc.googlegroups.com>
	<1174332094.908333.173920@l75g2000hse.googlegroups.com>
Message-ID: <1174335340.395889.29660@y66g2000hsf.googlegroups.com>

>
> Do we know more things about the developing of this product, is it
> active/dead or something ??
> I plan to use it to create something that will take a long time to
> finish and i wouldn't want to find out that the product is a dead-
> end...

There is still "some" development work going on but as with *all* open-
source volunteer based projects, there is *no* gurantee that any of
these software projects not be "dead-ended".   How many projects at
SourceForge are still "alive"?  No different from any commercial
project, for that matter.

On the other end, being an open-source project, I myself isn't that
concerned.  I found PythonCard fit my needs - it has been for several
years, and probably remain so for several years to come.  The fact
that there has been no new widgets added to the project for a couple
of years didn't bother me because I have what I need.  I have not run
into situations where my needs can not be met by learning from the
very extensive set of examples that matured with the package over the
years.

Do I wish that more developers pick up PythonCard and add new features
to it?  Certainly.  But then again, I don't have money to pay them.
What can I say?  :=)



From hat at se-126.se.wtb.tue.nl  Mon Mar 12 05:41:58 2007
From: hat at se-126.se.wtb.tue.nl (A.T.Hofkamp)
Date: Mon, 12 Mar 2007 10:41:58 +0100
Subject: distributed queue?
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
Message-ID: <slrneva836.71l.hat@se-126.se.wtb.tue.nl>

On 2007-03-10, Paul Rubin <http> wrote:
> Does anyone have an implementation of a distributed queue?  I.e. I
> have a long running computation f(x) and I'd like to be able to
> evaluate it (for different values of x) on a bunch of different

batchlib and the underlying exec_proxy are designed to handle exactly this type
of problem.
Both of them are in PyPI (and available at my site http://se.wtb.tue.nl/~hat).

Alnert


From bearophileHUGS at lycos.com  Thu Mar  8 04:34:12 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 8 Mar 2007 01:34:12 -0800
Subject: property syntax
Message-ID: <1173346452.096798.215970@t69g2000cwt.googlegroups.com>

Probably you have already discussed this topic, but maybe you can
stand touching it again briefly.
Maybe properties aren't used so often to deserve a specific syntax,
but I don't like their syntax much. Here I show some alternative
solutions that work with the current Python, followed by a syntax
idea, that may be better fit for Python 3.0 (but maybe changing its
name it can be retrofitted into Python 2.6 too).

Some code is from:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/410698
That I have modified to suit my tastes.


# The first version doesn't work with Psyco:
# import psyco; psyco.full()

import sys

def nestedproperty(function):
    keys = '__get__', '__set__', '__del__'
    func_locals = {'doc':function.__doc__}
    def probe_function(frame, event, arg):
        if event == 'return':
            locals = frame.f_locals
            func_locals.update(dict((k, locals.get(k)) for k in keys))
            sys.settrace(None)
        return probe_function
    sys.settrace(probe_function)
    function()
    return property(fget=func_locals.get("__get__"),
                    fset=func_locals.get("__set__"),
                    fdel=func_locals.get("__del__"),
                    doc=func_locals.get("doc")
                   )


class Angle(object):
    def __init__(self, rad):
        self._rad = rad

    @nestedproperty
    def rad():
        "The angle in radians"
        def __get__(self):
            return self._rad
        def __set__(self, angle):
            if isinstance(angle, Angle):
                angle = angle.rad
            self._rad = float(angle)

a = Angle(5)
print a.rad
a.rad = 10
print a.rad
help(a)

# =====================================================

# The second version is cleaner, but at the moment it has a problem
with the property docstring (but that may be fixed) (it works with
Psyco):

class classpropertytype(property):
    "Pythonic property syntax."
    # Code from:
    # www.z3lab.org/sections/blogs/philipp-weitershausen/2006_05_29_pycon-06-lightning-talk/
    def __init__(self, name, bases=(), members=None):
        if members is None:
            members = {}
        doc = members.get('__doc__')
        if doc is None:
            doc = members.get('__get__').__doc__
        sup = super(classpropertytype, self)
        return sup.__init__(members.get('__get__'),
                            members.get('__set__'),
                            members.get('__del__'),
                            doc)
classproperty = classpropertytype('classproperty')

class Angle(object):
    def __init__(self, rad):
        self._rad = rad

    class rad(classproperty):
        "The angle in radians"
        def __get__(self):
            return self._rad
        def __set__(self,angle):
            if isinstance(angle, Angle):
                angle = angle.rad
            self._rad = angle

a = Angle(5)
print a.rad
a.rad = 10
print a.rad
help(a)

# =====================================================

# The third way has a bit of magic, but I like it best, and it works
with Psyco too:

class _property_meta(type):
    def __new__(meta, class_name, bases, new_attrs):
        if bases == (object,):
            # The property class itself
            return type.__new__(meta,class_name,bases,new_attrs)
        keys = "fget fset fdel __doc__".split()
        return property(*(new_attrs.get(k) for k in keys))

class classproperty(object):
    __metaclass__ = _property_meta

    def __new__(cls, fget=None, fset=None, fdel=None, fdoc=None):
        if fdoc is None and fget is not None:
            fdoc = fget.__doc__
        return property(fget, fset, fdel, fdoc)


class Angle(object):
    def __init__(self, rad):
        self._rad = rad

    class rad(classproperty):
        "The angle in radians"
        def fget(self):
            return self._rad
        def fset(self,angle):
            if isinstance(angle, Angle):
                angle = angle.rad
            self._rad = angle


a = Angle(5)
print a.rad
a.rad = 10
print a.rad
help(a)


# =====================================================

# I may appreciate a better syntax, this is just an idea:
# (George Sakkis has suggested a different syntax that I like less)

"""

class Angle(object):
    def __init__(self,rad):
        self._rad = rad

    property rad:
        "The angle in radians"
        def __get__(self):
            return self._rad
        def __set__(self, angle):
            if isinstance(angle, Angle):
                angle = angle.rad
            self._rad = angle

class Angle2(Angle):
    property rad:
        def __get__(self):
            return self._rad * 2

"""

# I'd like that possible syntax to mean this:

class Angle(object):
    def __init__(self, rad):
        self._rad = rad

    def get_rad(self):
        return self._rad

    def set_rad(self, angle):
        if isinstance(angle, Angle):
            angle = angle.rad
        self._rad = angle

    rad = property(fget=lambda self: self.get_rad(),
                   fset=lambda self, angle: self.set_rad(angle),
                   doc="The angle in radians"
                  )

class Angle2(Angle):
    def get_rad(self):
        return self._rad * 2

a = Angle(5)
print a.rad
a.rad = 10
print a.rad
help(a)

a = Angle2(5)
print a.rad
a.rad = 10
print a.rad
help(a)

Bye,
bearophile



From aahz at pythoncraft.com  Sat Mar 24 11:44:49 2007
From: aahz at pythoncraft.com (Aahz)
Date: 24 Mar 2007 08:44:49 -0700
Subject: PyImport_ImportModule/embedding: surprising behaviors
References: <mailman.5359.1174435375.32031.python-list@python.org>
Message-ID: <eu3h1h$li2$1@panix3.panix.com>

In article <mailman.5359.1174435375.32031.python-list at python.org>,
David Abrahams  <dave at boost-consulting.com> wrote:
>
>I was under the impression that both the current directory *and* the
>python library directory were already, automatically, in sys.path, so
>I'm really surprised to see this.  Am I doing something wrong, or is
>this simply the expected behavior (and if so, where is it documented)?

IIRC (without bother to test), there has been some change in the
definition of "current directory" -- it used to be the actual current
directory of os.getcwd(), but since changed to the startup directory.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From b.r.willems at gmail.com  Wed Mar 21 20:59:57 2007
From: b.r.willems at gmail.com (Bart Willems)
Date: Wed, 21 Mar 2007 20:59:57 -0400
Subject: Technical Answer - Protecting code in python
In-Reply-To: <pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
Message-ID: <1tkMh.115$mG4.94@newsfe12.lga>

Steven D'Aprano wrote:
> Protect it from what? Viruses? Terrorists? The corrupt government? Your
> ex-wife cutting it up with scissors? People who want to copy it? People
> who will look at your code and laugh at you for being a bad programmer?
> 
> Until you tell us what you are trying to protect against, your question
> is meaningless.
> 
> Is your program valuable? Is it worth money? Then the 90% of script
> kiddies will just wait three days, and download the program off the
> Internet after the real hackers have broken your protection.
> 
> If it is NOT valuable, then why on earth do you think people will put up
> with whatever "protection" you use? Why won't they just use another
> program?

Some of us live in a world where consultants get paid for the work they 
do /by clients/. That work might be delivering the solution to some kind 
of problem. Whatever that problem is, a Python script can apparently 
solve it. Just to give a few ideas: grabbing data from a web server, 
converting output from system x in such a way that it can be used by 
system y, etc.

Now - and I know this will take a enormous leap of imagination, but try! 
try! - imagine that whatever the original problem was, it has changed. 
Maybe server x has changed into server z. Maybe the web page that we're 
pulling data from has a different format now. We don't know.

The consultant will leave a program that is of course highly 
configurable so that the client can make simple changes him/herself. He 
has to, as his clients will stop doing business if they have to call him 
for every fart they let out.

However, there can also be more complex cases. What the consultant wants 
is that the client will call HIM to fix the problem, not the director's 
nephew who took two weeks of classes.
Or the consultant wants to be sure that the two dimwitted nimcumpoops at 
the office who /think/ they can write code don't screw up the script 
when they're trying to 'fix' or 'improve' something. And blame the 
consultant if the script all of a sudden stops working 'we did not do 
anything. It just stopped working all of a sudden'.
Or he doesn't want to expose the passwords needed to logon to the 
database server. Or whatever.

So, there are reasons enough why someone wants to render his code 
immutable and/or unreadable *to some extent*. He doesn't have to fear 
reverse engineering by decompiling assembly code. If the 'hacker' can do 
that, he can probably put the whole script together. The consultant's 
problem are the people who shouldn't be touching or reading the script 
because they have no clue what they are doing and want to 'help' anyway. 
The OP clearly states that he does not want a discussion as to why to 
protect the code. All he wants is something that turns 'readable, 
changeable python' into 'unreadable, immutable python'. Yes, there are 
ways to get around it, but that is not his 'target audience' for the 
'protection'.

Yes, I do smell a troll, but not in the original mail.


From zefirek at Speacock.Pau.Apoznan.Mpl  Sat Mar  3 07:37:33 2007
From: zefirek at Speacock.Pau.Apoznan.Mpl (zefciu)
Date: Sat, 03 Mar 2007 13:37:33 +0100
Subject: Converting a c array to python list
In-Reply-To: <rowen-9DEBB0.13090902032007@gnus01.u.washington.edu>
References: <es66m4$cnr$1@inews.gazeta.pl>
	<rowen-9DEBB0.13090902032007@gnus01.u.washington.edu>
Message-ID: <esbq43$3ne$1@inews.gazeta.pl>

Russell E. Owen wrote:

> 
> It might help to have a clearer idea of why you want to do this. 
> 

I am writing a Mandelbrot fractal generator with Tkinter interface.  Now
the generation works like this - there is a loop in python which
iterates through fractal's pixels and for each of them calls a functions
which checks if it belongs to Mandelbrot set or how many iterations does
it take for this point to bail out.  Then the python function sets the
pixel's colour according to the result.

I was testing it first with python function, written rather for
readibility not speed, using the builtin complex class.  It took about
90 s to generate a 1152x864 fractal.  Then I used a c function and it
took 14 s.  When I told it to my friend (grad student of informatics) he
said "And probably 90% of the time takes calling the function".

So I think, that maybe I should put the whole loop into c code.  But as
before the function returned only one integer at every call, now it
would have to return a rather large array of integers (maybe chars would
be enough).

zefciu


From f.braennstroem at gmx.de  Tue Mar 27 13:16:45 2007
From: f.braennstroem at gmx.de (Fabian Braennstroem)
Date: Tue, 27 Mar 2007 17:16:45 +0000
Subject: pattern search
Message-ID: <eubcb0$5eu$1@sea.gmane.org>

Hi,

I wrote a small gtk file manager, which works pretty well. Until
now, I am able to select different file (treeview entries) just by
extension (done with 'endswith'). See the little part below:

                self.pathlist1=[ ]
                self.patternlist=[ ]
                while iter:
#                print iter
                    value = model.get_value(iter, 1)
#                if value is what I'm looking for:
                    if value.endswith("."+ pattern):
                        selection.select_iter(iter)
                        selection.select_path(n)
                        self.pathlist1.append(n)
                        self.patternlist.append(value)
                    iter = model.iter_next(iter)
#                print value
                    n=n+1

Now, I would like to improve it by searching for different 'real'
patterns just like using 'ls' in bash. E.g. the entry
'car*.pdf' should select all pdf files with a beginning 'car'.
Does anyone have an idea, how to do it?

Greetings!
Fabian



From michael at jedimindworks.com  Sun Mar 25 13:51:02 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 25 Mar 2007 12:51:02 -0500
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
In-Reply-To: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
Message-ID: <8B512040-E10D-4B0B-8079-2F53032ABB27@jedimindworks.com>


On Mar 25, 2007, at 12:04 PM, mark at agtechnical.co.uk wrote:

> don't even get me
> started on python docs.. ayaa ;]

ok, try getting started with this then:  http://www.crummy.com/ 
software/BeautifulSoup/


From bj_666 at gmx.net  Fri Mar  2 01:33:55 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 02 Mar 2007 07:33:55 +0100
Subject: html sql client
References: <1172813239.754095.231900@p10g2000cwp.googlegroups.com>
Message-ID: <pan.2007.03.02.06.33.54.662626@gmx.net>

In <1172813239.754095.231900 at p10g2000cwp.googlegroups.com>, gert wrote:

> I was thinking about making a column module that names the columns, i
> was hoping there would be some sort of api feature that already exist
> because parsing sql statemants to figure out which column is refers to
> what is allot of work.

Are you searching for the `description` attribute of cursors?  Section
`Cursor Objects`:

   http://www.python.org/dev/peps/pep-0249/

Ciao,
	Marc 'BlackJack' Rintsch


From vegaseat at yahoo.com  Fri Mar  2 13:13:31 2007
From: vegaseat at yahoo.com (vegaseat at yahoo.com)
Date: 2 Mar 2007 10:13:31 -0800
Subject: Will Python Run On Microsoft Vista?
In-Reply-To: <mailman.3571.1170696246.32031.python-list@python.org>
References: <1170695324.106530.157720@v45g2000cwv.googlegroups.com>
	<mailman.3571.1170696246.32031.python-list@python.org>
Message-ID: <1172859211.236906.317680@8g2000cwh.googlegroups.com>

On Feb 5, 9:24 am, Jonathan Curran <j... at icicled.net> wrote:
> On Monday 05 February 2007 11:08, slogging_away wrote:
>
> > I know, I know - flame away but its not clear to me if Python will run
> > on a system running MicrosoftVista.  Is anyone successfully running
> > Python onVista?  If so, is it what version of Python are you
> > running?  I'm ordering a new system and if Python won't work onVista
> > then it will definately influence the OS selection.
>
> > Thanks in advance!
>
> I don't see why Python wouldn't work. The 2.5 version clearly has a version
> forVistaalbeit its the x64 Edition. If you downloaded the regular version
> (x86) then I assume it would work just fine. D/L an evaluation copy ofVista
> and try it yourself.
>
> - Jonathan

Python works fine with Vista using the normal Python-2.5.msi
installer.  The one fly in the ointment is that Tkinter will not work
at this point (can't find _tkinter).  Good news is that wxPython
works!

Vega



From facundo at taniquetil.com.ar  Thu Mar 22 15:18:33 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Thu, 22 Mar 2007 19:18:33 +0000 (UTC)
Subject: Dyanmic import of a class
References: <1173388141.820852.98880@j27g2000cwj.googlegroups.com>
Message-ID: <etukq8$25k$1@sea.gmane.org>

rh0dium wrote:

> foo.py
>
> class foo:
>    def __init__(self):
>       print "Hi I am %s" % self.__class__.__name__

I wrote this in a file here...


> Now I have a bunch of these files.  I want to be able to dynamically
> import each one and run it.  I am having a problem actually doing the
> work.   I thought __import__ would work but I can't seem to get it to
> work.

>>> name = "foo"
>>> mod = __import__(name)
>>> theclass = getattr(mod, name)
>>> instance = theclass()
Hi I am foo


Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From johnjsal at NOSPAMgmail.com  Thu Mar 22 14:49:17 2007
From: johnjsal at NOSPAMgmail.com (John Salerno)
Date: Thu, 22 Mar 2007 14:49:17 -0400
Subject: Been a while...
In-Reply-To: <1174583526.581809.251420@p15g2000hsd.googlegroups.com>
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<mailman.5466.1174580521.32031.python-list@python.org>
	<1174583526.581809.251420@p15g2000hsd.googlegroups.com>
Message-ID: <4602cf20$0$29743$c3e8da3@news.astraweb.com>

kyosohma at gmail.com wrote:
> On Mar 22, 11:21 am, Michael Bentley <mich... at jedimindworks.com>
> wrote:
>> On Mar 22, 2007, at 10:34 AM, John Salerno wrote:
>>
>>> Hi guys. It's been a while since I've used Python, so I got a little
>>> rusty, but I really want to start using it again, just out of habit
>>> and
>>> for fun. Can anyone suggest a book or a website with little projects I
>>> could work on to keep me busy?
>> http://www.pythonchallenge.com
> 
> "Python Programming: An Introduction to Computer Science" by Zelle has
> lots of little homework assignments at the end of each chapter. That
> would probably keep you busy and up-to-snuff.
> 
> Mike
> 

Thanks. I think I have that book! I read a little of it but didn't do 
any assignments, so I'll check when I get home.


From silverburgh.meryl at gmail.com  Thu Mar 29 15:18:19 2007
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 29 Mar 2007 12:18:19 -0700
Subject: How can I get the content of a web site using http library
Message-ID: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>

I am trying to get the content of a web site like this:
But my question is how can I do a 'GET' request without putting the '/
index.html''


   h = httplib.HTTP('www.yahoo.com')

        # it takes 2 arguments here, but I don't know if the site has
'/index.html' , how can I leave this out?

        h.putrequest('GET')
        h.endheaders()

        errcode, errmsg, headers = h.getreply()

        if (errcode == 200):

            f = h.getfile()

Thank you for your help.



From fredrik at pythonware.com  Fri Mar 23 09:30:19 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 23 Mar 2007 14:30:19 +0100
Subject: Catching an unknown error
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
Message-ID: <eu0kpb$9um$1@sea.gmane.org>

Harlin Seritt wrote:

> In the last 'except' block, how can I print out the particular error
> name even though one is not specifically named?

the sys.exc_info() function returns information about the current exception.
see:

    http://effbot.org/pyref/sys.exc_info

</F> 





From gagsl-py2 at yahoo.com.ar  Wed Mar  7 00:32:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 02:32:06 -0300
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
References: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>
	<mailman.4703.1173163158.32031.python-list@python.org>
	<1173211320.042518.121890@8g2000cwh.googlegroups.com>
Message-ID: <op.tos0bsljx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 17:02:00 -0300, seberino at spawar.navy.mil  
<seberino at spawar.navy.mil> escribi?:

> On Mar 5, 10:38 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Tue, 06 Mar 2007 03:18:23 -0300, seber... at spawar.navy.mil
>> <seber... at spawar.navy.mil> escribi?:
>>
>> > The following web page puts a report in a *popup window* by clicking
>> > the "Generate Report" button....
>>
>> >http://moneycentral.msn.com/investor/research/printrep.asp?Symbol=BBBY
>>
>> > How can I grab this pop window page in a python script? (It doesn't
>> > seem to have a URL!?!)
>>
>> Of course it  
>> has:http://moneycentral.msn.com/investor/research/sreport.asp?Symbol=BBBY...
>> If your browser don't let you know the actual URL... try a better  
>> browser
>> :)
>
> Sure I can grab the aforementioned URL's contents but what about the
> NEW contents in the NEW popup window that appears AFTER you press some
> form buttons?  How grab *that* ?

The above URL corresponds to the "NEW popup window that appears AFTER you  
press some form buttons". In particular, that is what you get if you press  
the "simple report" button (or something like that, I don't remember, and  
if even you don't care to check it, me neither).

Anyway, I can think of 3 ways to get the info you want:
- select some options, try some buttons, and notice the URL on the  
generated popup window. Luckily it's an HTTP GET and that URL is the only  
info you need. (Again: if your browser isn't able to show you the URL, get  
a better one!)
- same as above, but using a protocol sniffer to record the HTTP  
requests/responses. This may be needed if HTTP POST is used instead.
- study the HTML+javascript code.

-- 
Gabriel Genellina



From deets at nospam.web.de  Fri Mar  2 12:30:34 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 Mar 2007 18:30:34 +0100
Subject: Python GUI + OpenGL
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <54r59qF228m8bU1@mid.uni-berlin.de>

Achim Domma wrote:

> Hi,
> 
> I'm developing a GUI app in Python/C++ to visualize numerical results.
> Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there
> are no windows binaries for Python 2.5 for quite some time now.
> 
> I need a OpenGL context without restrictions and some settings dialogs.
> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set
> of tools/libs?

PyQt, but then there is the licensing question of course.

Diez


From paul at boddie.org.uk  Fri Mar  9 06:56:01 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Mar 2007 03:56:01 -0800
Subject: What is the best way to upgrade python?
In-Reply-To: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
Message-ID: <1173441361.062745.38350@n33g2000cwc.googlegroups.com>

On 8 Mar, 22:13, "ying... at gmail.com" <ying... at gmail.com> wrote:
> Hi,
>
> i am using red hat enterprise 4. It has python 2.3 installed. What is
> the best way to upgrade to python 2.4?

By installing a version from the source packages available from
python.org.

> I think one way is to compile python 2.4 from the source, but I can't
> remove the old one since when i do 'rpm -e python', i get error like
> 'failed dependencies'.

That's because various administrative programs (and perhaps others)
depend on Python 2.3 - unless Red Hat provide versions of these for
Python 2.4 (which I suppose they don't in RHEL 4), then you can't
remove Python 2.3 from your system.

Either configure the source package choosing --prefix as something
other than /usr (the default is /usr/local) and then install using
"make install", or choose --prefix as /usr and do a "make altinstall".
Using package management tools to build custom packages which can then
be installed via the system tools might be an even better solution,
since you can then manage what you've done and uninstall if necessary,
but I can't tell you how that's done on Red Hat (with RPMs and so on).

Paul



From nagle at animats.com  Tue Mar 20 12:44:38 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 20 Mar 2007 09:44:38 -0700
Subject: How many connections can accept a 'binded' socket?
In-Reply-To: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>
References: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>
Message-ID: <ecULh.10215$P47.6848@newssvr22.news.prodigy.net>

billiejoex wrote:
> Hi,
> I'm writing a small asyncore-based server application serving a lot of
> clients. When I have to handle more than 1021 client simoultaneously
> the 'binded' socket object raises an error:

     When you ask questions like this, please specify what
operating system you're using.   Thanks.

				John Nagle


From borntonetwork at gmail.com  Sat Mar  3 16:03:11 2007
From: borntonetwork at gmail.com (borntonetwork)
Date: 3 Mar 2007 13:03:11 -0800
Subject: qcombobox.findtext and matchflags.matchendswith
In-Reply-To: <mailman.4632.1172942248.32031.python-list@python.org>
References: <1172940731.443430.161910@30g2000cwc.googlegroups.com>
	<mailman.4632.1172942248.32031.python-list@python.org>
Message-ID: <1172955791.873636.235450@j27g2000cwj.googlegroups.com>

On Mar 3, 12:17 pm, Phil Thompson <p... at riverbankcomputing.co.uk>
wrote:
> On Saturday 03 March 2007 4:52 pm,borntonetworkwrote:
>
>
>
> > Hi.
>
> > Using the PyQt4 library, I am trying to use the following
> > function("cbo" is a qtcombobox):
>
> > cbo.findText(searchStr, QtCore.MatchEndsWith)
>
> > If I don't use the "QtCore.MatchEndsWith", the function works
Thank you!

> > properly, but doesn't return partial matches ending with "searchStr".
> > If I use "QtCore.MatchEndsWith", I get the following error:
>
> > AttributeError: 'module' object has no attribute 'MatchEndsWith'
>
> > I've tried substituting the actual number that the enumerator
> > represents, which gives me a typeerror message complaining that the
> > argument has an invalid type.
>
> > Any suggestions?
>
> QtCore.Qt.MatchEndsWith
>
> Phil




From matthew.garman at gmail.com  Mon Mar 26 11:13:58 2007
From: matthew.garman at gmail.com (Matt Garman)
Date: Mon, 26 Mar 2007 09:13:58 -0600
Subject: Python object overhead?
In-Reply-To: <20070323220459.GS13084@performancedrivers.com>
References: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
	<20070323220459.GS13084@performancedrivers.com>
Message-ID: <bdd6985b0703260813t7db393cau2358a849db610290@mail.gmail.com>

On 3/23/07, Jack Diederich <jackdied at jackdied.com> wrote:
> If you make the record a new style class (inherit from object) you can
> specify the __slots__ attribute on the class.  This eliminates the per
> instance dictionary overhead in exchange for less flexibility.

When you say "new style class", do you mean that the __slots__ feature
is only available in a newer version of Python?  Unfortunately, I'm
stuck on 2.3.4 for this project.

Thanks,
Matt


From a.schmolck at gmail.com  Wed Mar 14 14:33:51 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 14 Mar 2007 18:33:51 +0000
Subject: Python equivalents to MATLAB str2func, func2str, ischar, isfunc?
References: <1173891444.243400.41690@e65g2000hsc.googlegroups.com>
	<yfsy7lz7o0v.fsf@oc.ex.ac.uk>
	<1173892625.206379.263780@d57g2000hsg.googlegroups.com>
Message-ID: <yfsslc77jzk.fsf@oc.ex.ac.uk>

"dmitrey" <openopt at ukr.net> writes:

> Thank you
> (however in MATLAB ischar is the same as isstr)

Right, sorry.

> but what if I don't know the name of module?
> I.e. I have
> 
> def myfunc(param): ...
> #where param can be both funcName or a function, and I want to obtain
> both name and func, something like
> if isinstance(param, basestring):
>    func, funcName = <something>, param
> else: func, funcName = param, param.__name__
> what should I type instead of <something>?

globals()[param] (I assume you don't want a local function, should one exist?)

'as


From gagsl-py2 at yahoo.com.ar  Mon Mar 26 09:07:35 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 Mar 2007 10:07:35 -0300
Subject: Calling Queue experts
References: <1174899202.355092.209590@l75g2000hse.googlegroups.com>
	<1174904972.597317.27240@e65g2000hsc.googlegroups.com>
Message-ID: <op.tpsr2xz2x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Mon, 26 Mar 2007 07:29:32 -0300, jrpfinch <jrpfinch at gmail.com> escribi?:

> Got it.  New PickleQueue class should be as follows:

Only a comment:

>     def _init(self, maxsize):
>         # Implements Queue protocol _init for persistent queue.
>         # Sets up the pickle files.
>         self.maxsize = maxsize
>         try:
>             self.readfile = file(self.filename, 'r')
>             self.queue = cPickle.load(self.readfile)
>             self.readfile.close()
>         except IOError, err:
>             if err.errno == 2:
>                 # File doesn't exist, continue ...
>                 self.queue = Queue.deque()
>             else:
>                 # Some other I/O problem, reraise error
>                 raise err
>         except EOFError:
>             # File was null?  Continue ...
>             self.queue = Queue.deque()
>
>
>         # Rewrite file, so it's created if it doesn't exist,
>         # and raises an exception now if we aren't allowed
>         self.writefile = file(self.filename, 'w')
>         cPickle.dump(self.queue, self.writefile, 1)

self.readfile may be left open in case of error, I'd use a try/finally.  
And since it isn't used anywhere, I'd just use a local variable instead of  
an instance attribute.
And the final write is not necesary when you have just read it - and  
alters the "last-modified-time" (that may not be relevant for you, of  
course, but as a general tool it may confuse other users).

-- 
Gabriel Genellina



From jzgoda at o2.usun.pl  Sun Mar 11 08:23:29 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sun, 11 Mar 2007 13:23:29 +0100
Subject: a better solution for GUI in python
In-Reply-To: <55iaceF24d6qgU2@mid.individual.net>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
	<1173613976.277044.242160@8g2000cwh.googlegroups.com>
	<55iaceF24d6qgU2@mid.individual.net>
Message-ID: <et0sjg$l8m$1@nemesis.news.tpi.pl>

Bjoern Schliessmann napisa?(a):

>> I'd recommend pyGTK. It's easy to use, delivers astonishing
>> results and is perfectly portable as far as I know. 
> 
> And how does it look on Windows? :)

On styled Windows XP it looks like any other styled application
(counting  those Qt and wx based). On Windows 2000 or unstyled XP since
GTK 2.10 it looks far better than Qt3 applications and nearly as good as
Win32 native applications (including wx based) or Qt4.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From fred at adventistcare.org  Fri Mar 16 10:57:36 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Fri, 16 Mar 2007 10:57:36 -0400
Subject: Need help with apack compression code
Message-ID: <BB295D7C21C5344E94A3EEBA9089BD940326B3@accmail2.sunbelt.org>

try google: "python apack" found several 

in general, always google first; python has so many devotees that someone
has generally solved most problems already.

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of priya kale
Sent: Thursday, March 15, 2007 11:33 PM
To: python-list at python.org
Subject: Need help with apack compression code [html-removed]


I need to code for decompressing the file which is compressed using Apack, I
am supposed to code it in visual c++, Plz help me finding algorithm
compatible to Widows based C or c++.

Regards,
 Priya Kale
(Pune)
-- 
http://mail.python.org/mailman/listinfo/python-list


From sickcodemonkey at gmail.com  Thu Mar 15 22:25:07 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Thu, 15 Mar 2007 22:25:07 -0400
Subject: Python shell on mac os x
In-Reply-To: <15e66e4e0703151504k696084efta253d42bbed75b9d@mail.gmail.com>
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
	<15e66e4e0703151504k696084efta253d42bbed75b9d@mail.gmail.com>
Message-ID: <2adc542f0703151925t51b711d3hc7194ac50c1fe135@mail.gmail.com>

I use iTerm and it took me a while to get use to it as well.  All you have
to do is go to  "Bookmarks-> Manage Profiles" Then expand "Terminal Profiles
->Default" and then for "type" select "linux".

You may have to restart iTerm, but you will be able to do everything you can
in linux.

Let me know if that does not help and I will look further.

Take care.

.dave huggins
aka sicksickmonkey

On 3/15/07, Greg Donald <gdonald at gmail.com> wrote:
>
> On 15 Mar 2007 14:56:13 -0700, Bert Heymans <bert.heymans at gmail.com>
> wrote:
> > >>> ^[OA^[OC^[OD
>
> Is your python built with readline support?
>
> Also, you might check out iPython.
>
>
> --
> Greg Donald
> http://destiney.com/
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From aleax at mac.com  Sun Mar 11 22:06:06 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 19:06:06 -0700
Subject: Object instance "reporting" to a container class instance
References: <mailman.4952.1173659784.32031.python-list@python.org>
Message-ID: <1hutrg4.13yxfjej55kq1N%aleax@mac.com>

Daniel Lipovetsky <daniel.lipovetsky at gmail.com> wrote:

> I would like for an object to "report" to a container object when a
> new instance is created or deleted. I could have a container object
> that is called when a new instance is created, as below.
> 
> class AnyObject:
>     pass
> 
> class Container:
>     links = []

Why a class variable rather than a normal instance variable?

>     def add(self,other):
>         while other not in self.links:
>             self.links.append(other)

What a weird implementation... why the while, &c?!

>     def rem(self,other):
>         while other in self.links:
>             self.links.remove(other)

Ditto.

> ...
> 
> container = Container()
> a = AnyObject()
> container.add(a)
> 
> My question is: can (should? :-) this "reporting" be done inside the
> instance's __init__ and __del__ methods (that is, an instance
> "reports" to the container as soon as it is created or deleted)?

The object's __del__ will never be called, because the object's presence
in the Container's self.links will always keep the object alive.

Study weak references -- and make the Container's links (whether it
needs to be a class or instance variable for the container) a
weakref.WeakValueDictionary (as keys, use unique, always-incrementing
integers) -- a WeakKeyDictionary is OK too if contained objects are
hashable by identity (and might make other things easier, e.g. moving an
object from one container to another by removing it from one and adding
it from the other).

With weak references, the "reporting" of the object's demise will be
automatic and transparent - the relevant dict entry just disappears when
the object does.  For the "registration", the call to the add method of
the container, it's fine to do it in __init__ if at contained-object's
init time you already know, invariably, what container it will be in.


Alex


From buzzard at urubu.freeserve.co.uk  Tue Mar 13 21:25:42 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Wed, 14 Mar 2007 01:25:42 +0000
Subject: number generator
In-Reply-To: <mailman.5007.1173770416.32031.python-list@python.org>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au><55fbgjF2492skU1@mid.individual.net><1173573654.009953.266280@30g2000cwc.googlegroups.com><7xbqj01u9c.fsf@ruckus.brouhaha.com>	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<mailman.5007.1173770416.32031.python-list@python.org>
Message-ID: <45f75596.0@entanet>

Hendrik van Rooyen wrote:
>  "Nick Craig-Wood" <nick at craig-wood.com> wrote:
> 
> 
>>Paul Rubin <http> wrote:
>>
>>> The fencepost method still seems to be simplest:
>>>
>>>     t = sorted(random.sample(xrange(1,50), 4))
>>>     print [(j-i) for i,j in zip([0]+t, t+[50])]
>>
>>Mmm, nice.
>>
>>Here is another effort which is easier to reason about the
>>distribution produced but not as efficient.
>>
>>def real(N, M):
>>    while 1:
>>        t = [ random.random() for i in range(N) ]
>>        factor = M / sum(t)
>>        t = [ int(round(x * factor)) for x in t]
>>        if sum(t) == M:
>>            break
>>        print "again"
>>    assert len(t) == N
>>    assert sum(t) == M
>>    return t
>>
>>It goes round the while loop on average 0.5 times.
>>
>>If 0 isn't required then just test for it and go around the loop again
>>if found.  That of course skews the distribution in difficult to
>>calculate ways!
>>
> 
> 
> I have been wondering about the following as this thread unrolled:
> 
> Is it possible to devise a test that can distinguish between sets
> of:
> 
> - five random numbers that add to 50, and
> - four random numbers and a fudge number that add to 50?
> 
> My stats are way too small and rusty to attempt to answer 
> the question, but it seems intuitively a very difficult thing.
> 
> - Hendrik
> 

Yes, if the generating processes yield numbers from different
probability mass functions.  You could simply look at the likelihood
ratio.  Otherwise, the likelihood ratio will be 1.

Duncan


From manstey at csu.edu.au  Sun Mar 25 22:34:51 2007
From: manstey at csu.edu.au (manstey)
Date: 25 Mar 2007 19:34:51 -0700
Subject: replacing one instance with another
In-Reply-To: <1174873457.277591.135390@y66g2000hsf.googlegroups.com>
References: <1174873114.590028.130920@p15g2000hsd.googlegroups.com>
	<1174873457.277591.135390@y66g2000hsf.googlegroups.com>
Message-ID: <1174876491.928319.223440@y66g2000hsf.googlegroups.com>

Hi, yet again to myself!

I've realised after further testing and reading that I actually need
to do this:

>>>dic_myinstances={}
>>>class MyClass(object):
    def __new__(cls,id):
        global dic_myinstances
        if dic_myinstances.has_key(id):
            return dic_myinstances[id]
        else:
            dic_myinstances[id] = super(MyClass, cls).__new__(cls, id)
            return dic_myinstances[id]
    def __init__(self,id):
        print id

>>>ins1 = MyClass('xx')
'xx'
>>>ins2 = MyClass('yy')
'yy'
>>>ins3 = MyClass('xx')
'xx'
>>>ins3 is ins1
True



From deets at nospam.web.de  Fri Mar  9 06:08:35 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 12:08:35 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
Message-ID: <55cthjF24csg6U1@mid.uni-berlin.de>

> 
> Well I'm not a big fan of decorators so I know how you must feel. But
> # FIXME + a hack doesn't seem clean to me. And commenting off the
> bottom half of a long script with triple quotes is ugly and a pain and
> you can't indicate multiple alternate halt points as in the 'tutorial
> script' example I gave.

It's not a hack. Without an IDE, there won't be support for that anyway -
after all, you're about to highlight blocks and the like, how is that
supposed to work?

And besides that - you might not _like_ decorators, but they do have a
semantic. Just inserting "random" characters into the source code that one
has to overread doesn't make any sense, it just clutters the code.

With an proper IDE, you could make that tagging of yours bound to a simple
keystroke, and the IDE could store the tagging information separately. E.g.
eric3 offers some bookmark features, I presume something like your proposal
would be possible, too.


Diez





From scott.w.white at gmail.com  Thu Mar 22 10:29:25 2007
From: scott.w.white at gmail.com (scott.w.white at gmail.com)
Date: 22 Mar 2007 07:29:25 -0700
Subject: My MVC critique
Message-ID: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>

Looking at different MVC frameworks from many langauges from PHP to
Python, I've concluded that the explosion of MVC frameworks is mainly
due to undisciplined & unexperienced programmers.

Nobody would argue about the separation of the layers because this is
not the problem I have with it, if anything most implementations
emphasis separation at the wrong places.  The end solutions end up
looking very mickey mouse.

It's been long asserted starting with Smalltalk there there be a
separation of layers with an application starting with the view (what
the user sees), the controller (which controls the flow of the
application) and the model (the representation of the data).

What MVC does not emphasis is the separation of the data access layer,
one of the most important pieces of an application.  So what is done
with this?  For many the DAL is either encapsulated within the model
or some toolkit that generates the SQL for them, this may lead to
decreased overall security of a database and inefficient queries.

The catalyst for MVC frameworks on the web has been the slew of poorly
written applications mostly in PHP & Perl , this has driven many
programmers looking for control & consistency.  However this need is
short sighted when people find a magical bullet MVC Framework, and do
not place emphasis on minimization & reusability of code.  Therefore
you end up with the same paradigm as before, just crappy applications
separated out into pieces.

No doubt there should be separation of layers, but there also has to
be a real dialogue about programming as a discipline & science, not as
a craft of gluing popsicle sticks together.

There should be more discussion of architecture before a project
starts and more code reviews and discussions in project teams.  Also
one off projects (putting one programming on an island giving them a
compiler/interpreter) is a great way to get a crappy application.

That being said, I presently don't use one, but I'm still holding out
for an MVC framework that works for me and provides me power,
flexibility and is well documented.



From bearophileHUGS at lycos.com  Tue Mar 20 04:02:54 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 20 Mar 2007 01:02:54 -0700
Subject: When is List Comprehension inappropriate?
In-Reply-To: <mailman.5284.1174321784.32031.python-list@python.org>
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<mailman.5284.1174321784.32031.python-list@python.org>
Message-ID: <1174377774.935134.44960@l75g2000hse.googlegroups.com>

BJ?rn Lindqvist:
> While they
> may be faster, Psyco is great here. Also, if you have lots of 2d-loops
> like "for x in something: for y in something:", then it could be more
> beautiful to separate the iteration from the task:
>
> def iterimage(im, width, height, step = 1):
>     for y in range(0, height, step):
>         for x in range(0, width, step):
>             yield (x, y), im.getpixel((x, y))

Just a note: Psyco usually isn't able to speed up generators (ShedSkin
recently has hadded a support of them too, and it seem fast enough).

Bye,
bearophile



From apardon at forel.vub.ac.be  Thu Mar  8 07:29:30 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 8 Mar 2007 12:29:30 GMT
Subject: how to convert an integer to a float?
References: <1172621139.954362.196170@k78g2000cwa.googlegroups.com>
	<W%WGh.104900$5j1.44848@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <slrnev00da.rbn.apardon@rcpc42.vub.ac.be>

On 2007-03-05, Andrew Koenig <ark at acm.org> wrote:
><yinglcs at gmail.com> wrote in message 
> news:1172621139.954362.196170 at k78g2000cwa.googlegroups.com...
>> Hi, I have the following functions,  but ' dx = abs(i2 - i1)/min(i2,
>> i1)' always return 0, can you please tell me how can i convert it from
>> an integer to float?
>
> I don't think that's what you really want to do.
>
> What you really want is for dx to be a float rather than being truncated to 
> an integer.  Division is going to behave that way in the future, so if you 
> want it to behave that way now, you can write
>
>     from __future__ import division
>
> at the beginning of your program.
>
> If for some reason you don't want to rely on using a version of Python that 
> knows about this future behavior, you might consider
>
>     dx = float(abs(i2 - i1))/min(i2, i1)

I prefer to multiply by 1.0 That has the advantage it continues to work
if your numbers happen to be complex.

-- 
Antoon Pardon


From mitko at qlogic.com  Thu Mar 29 18:09:33 2007
From: mitko at qlogic.com (Mitko Haralanov)
Date: Thu, 29 Mar 2007 15:09:33 -0700
Subject: Question about details of __import__
In-Reply-To: <op.tpyuhizax6zn5v@gabriel2.softlabbsas.com.ar>
References: <20070329104233.2129d267@opal.pathscale.com>
	<op.tpyrm8p5x6zn5v@gabriel2.softlabbsas.com.ar>
	<20070329115654.5455dd96@opal.pathscale.com>
	<op.tpyuhizax6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <20070329150933.1a8b87ce@opal.pathscale.com>

On Thu, 29 Mar 2007 16:45:08 -0300
"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:

> If you think that Python got confused and has two duplicate modules, try  
> to find them in sys.modules. Perhaps under the names 'log' and 'xxx.log'
> Or, using print, try to see *when* your global variable is reset to None.

OK, I figured it out: it turns out that for some reason, the global
namespace did not contain the log module, so when the modules imported
with __import__ got processed, their log module got a new namespace (at
least, that's what I think is happening).
Once the log module became a top level module in sys.modules,
everything worked.

-- 
Mitko Haralanov					 mitko at qlogic.com
Senior Software Engineer			     650.934.8064
System Interconnect Group		    http://www.qlogic.com

==========================================
If computers take over (which seems to be their natural tendency), it
will serve us right.
		-- Alistair Cooke


From bdesth.quelquechose at free.quelquepart.fr  Fri Mar  2 20:46:57 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 03 Mar 2007 02:46:57 +0100
Subject: How *extract* data from XHTML Transitional web pages? got
	xml.dom.minidom troubles..
In-Reply-To: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
References: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
Message-ID: <45e8cbae$0$6774$426a74cc@news.free.fr>

seberino at spawar.navy.mil a ?crit :
> I'm trying to extract some data from an XHTML Transitional web page.
> 
> What is best way to do this?
> 
> xml.dom.minidom.

As a side note, cElementTree is probably a better choice. Or even a 
simple SAX parser.

>parseString("text of web page") gives errors about it
> not being well formed XML.

If it's not well-formed XML, most - if not all - XML parsers will shoke 
on it.

> Do I just need to add something like <?xml ...?> or what?

How could we say without looking at the XML ?

But anyway, even if the XHTML is crappy, BeautifulSoup may do the job...

HTH


From lubiao.py at gmail.com  Wed Mar 14 21:12:08 2007
From: lubiao.py at gmail.com (lubiao)
Date: Thu, 15 Mar 2007 09:12:08 +0800
Subject: Swig Problem string&
Message-ID: <4e48f0ea0703141812t2794fdf5pfac61cf2d8bf1b7b@mail.gmail.com>

Hi

 I have created a simple function called  'addTheString(string& str,
string appstr)' and the intension
 is to append the 'appstr' to 'str' and use 'str'.

 I tried swigging this method. My swigtest.i file is okay as I think
I have added both
    - stl.i at top
    - std_string.i

  However, I am running into the problem. I get error messages as follows

  -- error --
 TypeError: argument number 1: a 'std::string&' is expected,
  -- end error --


From fredrik at pythonware.com  Tue Mar 20 11:07:32 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Tue, 20 Mar 2007 16:07:32 +0100
Subject: Subject line with smtplib.sendmail()
References: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com>
Message-ID: <etotbk$b1c$1@sea.gmane.org>

Boudreau, Emile wrote:

> I'm trying to send mail from my server to my machine with test
> results. I can send the email no problem however, the email doesn't
> contain a "recipient list" or a "subject line". I was wondering how
> would I go about getting the information on the actual "To" and
> "Subject" lines so that I know to whom the email was sent and the
> subject line without opening the email?

you have to add the headers yourself.  see the example in the library
reference, or this FAQ entry:

    http://effbot.org/pyfaq/how-do-i-send-mail-from-a-python-script

</F> 





From python-url at phaseit.net  Wed Mar 21 22:36:29 2007
From: python-url at phaseit.net (Cameron Laird)
Date: Thu, 22 Mar 2007 02:36:29 +0000 (UTC)
Subject: Python-URL! - weekly Python news and links (Mar 22)
Message-ID: <etsq3d$jcg$1@lairds.us>

This is the first time you've received "Python-URL!" in 2007.  No,
that's not the fault of your mail server; we've just been on sabbatical.
Now we're back.  


QOTW:  "'Doesn't seem to work' is effectivly even more useless than
'doesn't work' [as a symptomatic description]." - Bruno Desthuilliers
    http://groups.google.com/group/comp.lang.python/browse_thread/thread/5055abaa958fd81b/

"Linux and Python got a fan due to PySol. It should be considered a cultural
treasure, and if a bit of funding would help keep it rolling into the future,
that might be worthwhile." - Harry George
    http://groups.google.com/group/comp.lang.python/browse_thread/thread/716ef184ffc90db0/


    Python supports all sorts of interesting introspection, including,
    for example, examination of a function's docstring:
	http://groups.google.com/group/comp.lang.python/msg/2b5ea6834ec6b6c7

    Pybots deserve to be better known and appreciated:
	http://pybots.org/

    Alex Martelli computationally demonstrates that CPython does *not*
    implement "x = y = z" as "y = z; x = y".
	http://groups.google.com/group/comp.lang.python/browse_thread/thread/8e592af30d621b77/

========================================================================
Everything Python-related you want is probably one or two clicks away in
these pages:

    Python.org's Python Language Website is the traditional
    center of Pythonia
        http://www.python.org
    Notice especially the master FAQ
        http://www.python.org/doc/FAQ.html

    PythonWare complements the digest you're reading with the
    marvelous daily python url
         http://www.pythonware.com/daily
    Mygale is a news-gathering webcrawler that specializes in (new)
    World-Wide Web articles related to Python.
         http://www.awaretek.com/nowak/mygale.html
    While cosmetically similar, Mygale and the Daily Python-URL
    are utterly different in their technologies and generally in
    their results.

    For far, FAR more Python reading than any one mind should
    absorb, much of it quite interesting, several pages index
    much of the universe of Pybloggers.
	http://lowlife.jp/cgi-bin/moin.cgi/PythonProgrammersWeblog
        http://www.planetpython.org/
        http://mechanicalcat.net/pyblagg.html

    The Python Papers aims to publish "the efforts of Python enthusiats".
	http://pythonpapers.org/

    comp.lang.python.announce announces new Python software.  Be
    sure to scan this newsgroup weekly.
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce

    Python411 indexes "podcasts ... to help people learn Python ..."
    Updates appear more-than-weekly:
        http://www.awaretek.com/python/index.html

    Steve Bethard continues the marvelous tradition early borne by
    Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim
    Lesher of intelligently summarizing action on the python-dev mailing
    list once every other week.
	http://www.python.org/dev/summary/

    The Python Package Index catalogues packages.
        http://www.python.org/pypi/

    The somewhat older Vaults of Parnassus ambitiously collects references
    to all sorts of Python resources.
        http://www.vex.net/~x/parnassus/

    Much of Python's real work takes place on Special-Interest Group
    mailing lists
        http://www.python.org/sigs/

    Python Success Stories--from air-traffic control to on-line
    match-making--can inspire you or decision-makers to whom you're
    subject with a vision of what the language makes practical.
        http://www.pythonology.com/python/success

    The Python Software Foundation (PSF) has replaced the Python
    Consortium as an independent nexus of activity.  It has official
    responsibility for Python's development and maintenance.
        http://www.python.org/psf/
    Among the ways you can support PSF is with a donation.
        http://www.python.org/psf/donate.html

    Kurt B. Kaiser publishes a weekly report on faults and patches.
        http://www.google.com/groups?as_usubject=weekly%20python%20patch

    Although unmaintained since 2002, the Cetus collection of Python
    hyperlinks retains a few gems.
        http://www.cetus-links.org/oo_python.html

    Python FAQTS
        http://python.faqts.com/

    The Cookbook is a collaborative effort to capture useful and
    interesting recipes.
	http://aspn.activestate.com/ASPN/Cookbook/Python

    Among several Python-oriented RSS/RDF feeds available are
	http://www.python.org/channews.rdf
	http://bootleg-rss.g-blog.net/pythonware_com_daily.pcgi
	http://python.de/backend.php
    For more, see
	http://www.syndic8.com/feedlist.php?ShowMatch=python&ShowStatus=all
    The old Python "To-Do List" now lives principally in a
    SourceForge reincarnation.
        http://sourceforge.net/tracker/?atid=355470&group_id=5470&func=browse
	http://www.python.org/dev/peps/pep-0042/

    The online Python Journal is posted at pythonjournal.cognizor.com.
    editor at pythonjournal.com and editor at pythonjournal.cognizor.com
    welcome submission of material that helps people's understanding
    of Python use, and offer Web presentation of your work.

    del.icio.us presents an intriguing approach to reference commentary.
    It already aggregates quite a bit of Python intelligence.
        http://del.icio.us/tag/python

    *Py: the Journal of the Python Language*
        http://www.pyzine.com

    Archive probing tricks of the trade:
        http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python&num=100
        http://groups.google.com/groups?meta=site%3Dgroups%26group%3Dcomp.lang.python.*

Previous - (U)se the (R)esource, (L)uke! - messages are listed here:
  http://www.ddj.com/topic/python/ (requires subscription)
  http://groups-beta.google.com/groups?q=python-url+group:comp.lang.python*&start=0&scoring=d&
  http://purl.org/thecliff/python/url.html (dormant)
or
  http://groups.google.com/groups?oi=djq&as_q=+Python-URL!&as_ugroup=comp.lang.python
There is *not* an RSS for "Python-URL!"--at least not yet.  Arguments
for and against are occasionally entertained.


Suggestions/corrections for next week's posting are always welcome.
E-mail to <Python-URL at phaseit.net> should get through.

To receive a new issue of this posting in e-mail each Monday morning
(approximately), ask <claird at phaseit.net> to subscribe.  Mention
"Python-URL!".  Write to the same address to unsubscribe.


-- The Python-URL! Team--

Phaseit, Inc. (http://phaseit.net) is pleased to participate in and
sponsor the "Python-URL!" project.  Watch this space for upcoming
news about posting archives.


From collver at peak.org  Mon Mar 26 09:15:47 2007
From: collver at peak.org (Ben Collver)
Date: Mon, 26 Mar 2007 06:15:47 -0700
Subject: osx tkinter listbox problem
Message-ID: <nbednXit24cYWprbnZ2dneKdnZydnZ2d@scnresearch.com>

I am using Darwin 10.4.9, tcl 8.4.7, tk 8.4, and python 2.3.5.  I have 
also tried Python 2.5 on Darwin, Debian, and Fedora Core 6.

I am working on a GUI front-end to a Python program of mine.  It is a 
simple grid with labels in the left column and input widgets in the 
right column.  One of the rows has a listbox in the right column.  The 
listbox contains two items.  I select one using widget.select_set(). 
The GUI is not complete yet, because I am still learning about Python 
and Tkinter.

On Linux, the GUI works as expected.  On OSX, when select_set() runs, 
the listbox disappears from its place in the grid, and appears in the 
upper left corner of the window.  Here are screen shots to illustrate.
http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysfi-debian.jpg
http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysfi-osx.png

The GUI code itself is at the following location.
http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysfi.py

To run, it needs the Python program at the following location.
http://terrorpin.net/~ben/docs/alt/music/soundfont/pysf-wip/pysf.py

Why does the listbox change position at all?  Am I using listbox 
incorrectly?

Thank you,

Ben




From jzgoda at o2.usun.pl  Fri Mar 16 11:05:35 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Fri, 16 Mar 2007 16:05:35 +0100
Subject: Eureka moments in Python
In-Reply-To: <mailman.5050.1173835821.32031.python-list@python.org>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
	<mailman.5050.1173835821.32031.python-list@python.org>
Message-ID: <etebpb$oa7$1@atlantis.news.tpi.pl>

Ben Finney napisa?(a):

>> I'd be interested in hearing people's stories of Eureka moments in
>> Python, moments where you suddenly realise that some task which
>> seemed like it would be hard work was easy with Python.
> 
> I don't recall the exact context, but Python was the language that
> introduced me to the power of a unified type system.
> 
> The application I was writing was doing a whole lot of bookkeeping of
> information about what kind of data was being processed, which had to
> be kept updated in parallel with the data itself. Once I realised that
> "unified type system" and "first-class objects" meant that I could
> simply store the *type itself* as data, whether a basic type or one of
> my own, things became astoundingly easier. Soon after that I learned
> that functions are also objects, and I was hooked.

This was exactly the same "eureka" in my case too -- functions are
objects. I can store in a tuple the function and its arguments, then the
only thing I have to do is to call first element with the rest of
elements as arguments. This code now scares people in my former job --
being Java and C++ heads they just cann't get it... ;)

-- 
Jarek Zgoda

"We read Knuth so you don't have to."


From godsknight07 at gmail.com  Tue Mar 27 00:51:51 2007
From: godsknight07 at gmail.com (Sang Park)
Date: Mon, 26 Mar 2007 23:51:51 -0500
Subject: help with radionbutton
Message-ID: <CE02B049-6583-4D31-B8C0-2972B402735F@gmail.com>

how do I select radionbutton by default?
for my school project, I need to have 10 radio buttons and have half  
of them selected
I have
for i in range(10):
	x = IntVar()
	if i < 5:
		rb = Radiobutton(buttonFrame, variable=x, value=1,state=DISABLED)	
	else:
		rb = Radiobutton(buttonFrame, variable=x, value=0,state=DISABLED)	

I tried x.set(1) or x.set(0) before or after but the all seem to be  
deselected when displayed on the screen
I also tried calling rb.select/deselect() but that doesn't seem to  
work either...
can anyone help me?


Sang Park
lordofthefobs at gmail.com



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From gagsl-py2 at yahoo.com.ar  Fri Mar  9 04:37:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 06:37:08 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>
	<mailman.4834.1173407718.32031.python-list@python.org>
	<Xns98EE5A4ADA267duncanbooth@127.0.0.1>
Message-ID: <op.tow0z6gbx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 05:52:35 -0300, Duncan Booth  
<duncan.booth at invalid.invalid> escribi?:

> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> wrote:
>
>> Not the *previous* exception, but the *current* one. You must be
>> inside an  "except" clause to use a bare raise.
>>
> No, you don't have to be inside an except clause to use a bare raise.
> A bare 'raise' will re-raise the last exception that was active in the
> current scope. That applies even outside the except clauses just so long
> as there has been an exception within the same function:

Oh! Thanks, I didn't know that.
I tested it in the interpreter, outside any function, and the exception  
info was lost immediately, so I wrongly concluded that it lived shortly.

-- 
Gabriel Genellina



From tinaweb at bestemselv.com  Thu Mar  1 03:00:14 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Thu, 01 Mar 2007 09:00:14 +0100
Subject: PyQt4: Clickable links in QLabel?
Message-ID: <XaydncLKqZaMFXvYRVnzvA@telenor.com>

Hi everyone,

A short and sweet question: Is it possible to put a clickable link in a 
QLabel that will open in the systems default browser?
I tried to put in some HTML but it did (of course?) simply display the 
code instead of a link. I also tried to set openExternalLinks 'true' but 
then pyuic4 bombed.
I see that QLabel does not have a html text format but I'm still hoping 
it's possible. I really need a link on my main window form.

Thanks
Tina


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Mar  9 11:07:00 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 09 Mar 2007 17:07:00 +0100
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <slrnev2m9v.179.nick@irishsea.home.craig-wood.com>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
	<45f138ee$0$23918$426a74cc@news.free.fr>
	<m11wjyy7p5.fsf@chezmarshall.freeserve.co.uk>
	<slrnev2m9v.179.nick@irishsea.home.craig-wood.com>
Message-ID: <45f185f2$0$21511$426a34cc@news.free.fr>

Nick Craig-Wood a ?crit :
> Robert Marshall <spam at chezmarshall.freeserve.co.uk> wrote:
>>  On Fri, 09 Mar 2007, Bruno Desthuilliers wrote:
>>
>>> Nick Craig-Wood a ?crit :
>>>> dbhbarton at googlemail.com <dbhbarton at googlemail.com> wrote:
>>>>>  What if 2 new 'special' comment-like characters were added to
>>>>>  Python?:
>>>>>
>>>>>
>>>>>  1. The WIP (Work In Progress) comment:
>>>> I use # FIXME for this purpose or /* FIXME */ in C etc.
>>>>
>>>> I have an emacs macro which shows it up in bright red / yellow text
>>>> so it is easy to see
>>> <ot>
>>> Care to share this macro ?
>>> </ot>
>>  I have this
>>
>>  (cond (window-system
>>     (progn
>>       (font-lock-add-keywords 
>>          'python-mode '(("\\<FIXME: .*$" 0 font-lock-warning-face prepend))))))
> 
> This is what I use which is very similar
> 
> (font-lock-add-keywords 'python-mode
>   '(
>     ("\\<\\(FIXME\\):?" 1 font-lock-warning-face prepend)
>     )
>   )
> 

Thanks you both.


From gslindstrom at gmail.com  Wed Mar 14 10:56:55 2007
From: gslindstrom at gmail.com (gslindstrom at gmail.com)
Date: 14 Mar 2007 07:56:55 -0700
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
Message-ID: <1173884215.842920.5490@y66g2000hsf.googlegroups.com>

On Mar 13, 5:34 pm, "israph... at googlemail.com"
<israph... at googlemail.com> wrote:
> Hi all.
>
> I have a problem with some code :(
>
> -----------
>
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
>
> while (hint != 'n') or (hint != 'y'):
>     hint = raw_input("Please specify a valid choice: ")
>

I'd even make it a little more bullet-proof by using lower()

while hint.lower() not in ('y','n'):
  stuff

That way if the user types in 'Y' on 'N' it will still work.  I've
even gone further on occasion

while hint.lower()[0] not in ('y','n'):
  stuff

so if they type 'Yes' or 'No' you're still good.

--greg



From kyosohma at gmail.com  Wed Mar 28 17:08:00 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 28 Mar 2007 14:08:00 -0700
Subject: Finding User Profile path
Message-ID: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>

Hi,

I am trying to query our domain to get a list of our users profile
locations. I thought I might be able to use WMI, but I can't get it to
work. I am using a Windows XP Pro workstation and Python 2.4 on a
mixed environment of Debian Linux (with Samba) and Windows servers. We
are in the process of moving the user profiles from an NT box to a
Debian box, but due to the many different servers in the organization,
it is a pain to keep track of which have been moved and which haven't.

Thank you for any help.

Mike



From aspineux at gmail.com  Sat Mar 17 20:22:50 2007
From: aspineux at gmail.com (aspineux)
Date: 17 Mar 2007 17:22:50 -0700
Subject: MIME Magic
In-Reply-To: <1174175669.774906.225530@l77g2000hsb.googlegroups.com>
References: <1174172570.473458.215460@y80g2000hsf.googlegroups.com>
	<87fy834fdm.fsf@gmail.com>
	<1174175669.774906.225530@l77g2000hsb.googlegroups.com>
Message-ID: <1174177370.867623.258970@b75g2000hsg.googlegroups.com>

On 18 mar, 00:54, "Samuel" <knipk... at gmail.com> wrote:
> On Mar 18, 12:30 am, Jorge Godoy <jgo... at gmail.com> wrote:
>
> > I'd start by taking a look at "file"'s code. :-)
>
> > The thing is being able to identify the signatures of several different types
> > of files.  Here's some help for you:http://www.garykessler.net/library/file_sigs.html
>
> > And here's an example of an authoritative source for that table:http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html
>
> Actually, I am looking for an existing solution because I do not want
> to write it from scratch... I hope I am not out of options.
>
> -Samuel


python-magic : Python binding for the magic library

This Python library can be use to query /etc/magic information for a
given file in Python.




From anton.vredegoor at gmail.com  Wed Mar 28 19:37:20 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Thu, 29 Mar 2007 01:37:20 +0200
Subject: Hpw make lists that are easy to sort.
In-Reply-To: <mailman.5732.1175121444.32031.python-list@python.org>
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl><7xbqidgqy0.fsf@ruckus.brouhaha.com>	<euenlj$oll$1@news4.zwoll1.ov.home.nl>
	<mailman.5732.1175121444.32031.python-list@python.org>
Message-ID: <eueu79$mkd$1@news5.zwoll1.ov.home.nl>

Terry Reedy wrote:

> One could generate the items in order in less space by doing, for instance, 
> an m-way merge, in which only the lowest member of each of the m sublists 
> is present at any one time.  But I don't know if this (which is 
> O(m*n*log(m))) would be any faster (in some Python implementation) for any 
> particular values of m and m.

If hashing is O(n+m), it would mean that it would be faster.

I'm not sure if I can agree with your analysis. All information to 
generate the product is already inside the two lists we begin with. 
Doesn't that make the product less complex than a random n*m matrix? Or 
is that what you are saying with O(m*n*log(m)) ?

A.


From zefirek at Speacock.Pau.Apoznan.Mpl  Sat Mar 10 16:36:16 2007
From: zefirek at Speacock.Pau.Apoznan.Mpl (zefciu)
Date: Sat, 10 Mar 2007 22:36:16 +0100
Subject: Curious behaviour of Tkinter object
Message-ID: <esv89o$lqc$1@inews.gazeta.pl>

I am writing a program with python and Tkinter.  I have encountered a
mysterious problem with the whole application hanging itself (cannot be
stopped with ctrl-c, must be killed from another console).  I have done
several tests with interactive mode, and here what I noticed:
- the problem is with a class MandelSetWindow that I attach, as other
classes work properly

- the class can be initialized properly, but behaves strangely with
other windows.  Here is how to reproduce this bug:

* import Tkinter.Tk and this class
* create a Tk() instance and take a reference to it
* create an instance to this class (can use (None, None) as arguments)
and take a reference to it

Now everything looks normal.  Both references refer to objects like they
were created.  But try to e.g. withdraw() either the root Tk window or
this dialog.  You will notice that the other withdraws.  I really can't
understand why it happens like this.

zefciu
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From tactics40 at gmail.com  Sun Mar 25 15:25:28 2007
From: tactics40 at gmail.com (tac-tics)
Date: 25 Mar 2007 12:25:28 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
Message-ID: <1174850728.763643.119040@l77g2000hsb.googlegroups.com>

On Mar 25, 1:06 pm, "gslm" <slm_gu... at hotmail.com> wrote:
> Hi!
> I'm too new on phyton.I have installed phyton.But when I write phyton
> command, unfortunately, i can't run.I suppose that it is bacause of
> setting path.But i can't solve.
> Can you help?

You need to set what is called your PATH environment variable. See:
http://www.computerhope.com/issues/ch000549.htm
and add C:\python\ (or wherever your python package is installed) to
your PATH.

>
> Another thing is, when i double click the .py file, there are the
> project form and the command line.How can i provide to view only the
> project?

I don't quite understand what you're asking here.



From aisaac at american.edu  Sat Mar 10 00:36:41 2007
From: aisaac at american.edu (Alan Isaac)
Date: Sat, 10 Mar 2007 05:36:41 GMT
Subject: __init__ in subclass of tuple
Message-ID: <JtrIh.97$I56.9@trnddc06>

I am probably confused about immutable types.
But for now my questions boil down to these two:

- what does ``tuple.__init__`` do?
- what is the signature of ``tuple.__init__``?

These questions are stimulated by
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303439
Looking at that, what fails if I leave out the following line? ::

    tuple.__init__(self)

For exaple, if I try::

    class Test1(tuple):
        def __init__(self,seq):
            pass

I seem to get a perfectly usable tuple.
What initialization is missing?

Next, the signature question.
I'm guessing the signature is something like
tuple.__init__(self, *args, **kwargs)
with nothing done with anything but self.
As a trivial illustrative example::

    class Test2(tuple):
        def __init__(self,seq):
            tuple.__init__(self, "foo", "bar")

seems to cause no objections.

One last question: where should I have looked
to answer these questions?

Thanks,
Alan Isaac




From ark at acm.org  Mon Mar  5 10:51:18 2007
From: ark at acm.org (Andrew Koenig)
Date: Mon, 05 Mar 2007 15:51:18 GMT
Subject: how to convert an integer to a float?
References: <1172621139.954362.196170@k78g2000cwa.googlegroups.com>
Message-ID: <W%WGh.104900$5j1.44848@bgtnsc04-news.ops.worldnet.att.net>

<yinglcs at gmail.com> wrote in message 
news:1172621139.954362.196170 at k78g2000cwa.googlegroups.com...
> Hi, I have the following functions,  but ' dx = abs(i2 - i1)/min(i2,
> i1)' always return 0, can you please tell me how can i convert it from
> an integer to float?

I don't think that's what you really want to do.

What you really want is for dx to be a float rather than being truncated to 
an integer.  Division is going to behave that way in the future, so if you 
want it to behave that way now, you can write

    from __future__ import division

at the beginning of your program.

If for some reason you don't want to rely on using a version of Python that 
knows about this future behavior, you might consider

    dx = float(abs(i2 - i1))/min(i2, i1)

as an alternative.




From sjdevnull at yahoo.com  Sun Mar 11 01:52:25 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 10 Mar 2007 22:52:25 -0800
Subject: Python in a desktop environment
In-Reply-To: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
Message-ID: <1173595945.530722.273030@30g2000cwc.googlegroups.com>

David Cramer wrote:
> If you had an application that you were about to begin development on
> which you wanted to be cross platform (at least Mac and Windows),
> would you suggest using c++ and Python?

I'd strongly consider a pure python solution (I'd choose wxpython),
but if I needed to code backend stuff in a lower level language I'd
use C rather than C++.



From gtcopeland at gmail.com  Fri Mar  9 14:38:58 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 9 Mar 2007 11:38:58 -0800
Subject: Are Lists thread safe?
In-Reply-To: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
Message-ID: <1173469137.897102.298120@p10g2000cwp.googlegroups.com>

On Mar 9, 1:03 pm, "abcd" <codecr... at gmail.com> wrote:
> Are lists thread safe?  Or do I have to use a Lock when modifying the
> list (adding, removing, etc)?  Can you point me to some documentation
> on this?
>
> thanks


Yes there are still some holes which can bite you.  Adding and
removing is thread safe but don't treat the list as locked between
operations unless you specifically do your own locking.  You still
need to be on the lookout for race conditions.

Greg



From john at datavoiceint.com  Mon Mar 19 10:59:06 2007
From: john at datavoiceint.com (HMS Surprise)
Date: 19 Mar 2007 07:59:06 -0700
Subject: Executing a list of functions
In-Reply-To: <etfdkg$ilt$1@daisy.noc.ucla.edu>
References: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
	<etfdkg$ilt$1@daisy.noc.ucla.edu>
Message-ID: <1174316346.944396.298810@n76g2000hsh.googlegroups.com>

On Mar 16, 6:44 pm, James Stroud <jstr... at mbi.ucla.edu> wrote:
> HMS Surprise wrote:
> > Seems to me that one should be able to put the names of several
> > functions in a list and then have the list executed. But it seems the
> > output of the functions is hidden, only their return value is visible.
> > Is this because the list execution is another scope?
>
> > Thanx,
>
> > jh
>
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> > def a():
> >     print "this is a"
>
> > def b():
> >     print "this is b"
>
> > lst = [a(), b()]
>
> > lst
>
> The "print" statement does nothing to return a value from the function,
> so the strings "this is *" will not be stored in your list. They will,
> however, be printed if you are some how observing your program output
> (e.g. running it in IDLE, or a command shell).
>
> To save the "results" of the functions, you need to produce results,
> which means actually using "return" to return some value. Here is an
> example:
>
> def a():
>    print "this is a"
>    return "return value from a"
>
> def b():
>    print "this is b"
>    return "return value from b"
>
> functions = [a, b]
> results = [f() for f in functions]
> print results
>
> Here is the result of this example:
>
> py> def a():
> ...   print "this is a"
> ...   return "return value from a"
> ...
> py> def b():
> ...   print "this is b"
> ...   return "return value from b"
> ...
> py> functions = [a, b]
> py> results = [f() for f in functions]
> this is a
> this is b
> py> print results
> ['return value from a', 'return value from b']
>
> A fun, but unfortunately deprecated, way to do this is with the "apply"
> function in conjunction with the "map" function:
>
> def a():
>    print "this is a"
>    return "return value from a"
>
> def b():
>    print "this is b"
>    return "return value from b"
>
> functions = [a, b]
> results = map(apply, functions)
> print results
>
> Here is this example at work:
>
> py> def a():
> ...   print "this is a"
> ...   return "return value from a"
> ...
> py> def b():
> ...   print "this is b"
> ...   return "return value from b"
> ...
> py> functions = [a, b]
> py> results = map(apply, functions)
> this is a
> this is b
> py> print results
> ['return value from a', 'return value from b']
>
> James

Thanks to all for posting.

Why is apply deprecated?

jh



From deets at nospam.web.de  Mon Mar 12 07:34:15 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 12:34:15 +0100
Subject: How to modify the source of a python file inside a python egg
	file?
References: <1173670160.897478.34450@j27g2000cwj.googlegroups.com>
Message-ID: <55ks5nF24rehtU1@mid.uni-berlin.de>

yinglcs at gmail.com wrote:

> How to modify the source of a python file inside a python egg file?
> I can see the file by unzipping it, but how can I package it back as a
> python egg file after my modification.

So far I never tried this - but how about zipping it? Besides, you can
install eggs unzipped directly, try easy_install --help for options.

Diez


From julius.welby at gmail.com  Fri Mar 23 05:25:16 2007
From: julius.welby at gmail.com (jwelby)
Date: 23 Mar 2007 02:25:16 -0700
Subject: python on window
In-Reply-To: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
References: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
Message-ID: <1174641916.227042.224500@o5g2000hsb.googlegroups.com>

On Mar 23, 7:25 am, "sandeep patil" <san.gu... at gmail.com> wrote:
> i have install python on window xp os.
> C:/program files/python
>
> i have done print program it working but .py can't  working
>  help me  to how i will execute this file this file where i will save
> it.
> path execution how .
> tell me about any envorment veriable in python to set before python
> editor run,it path. etc
> ************************************************************
>
> >>> print ' sandeep patil'
>  sandeep patil
> >>> print ' sandeep "bhagwan " patil ,msc. java j2ee developer"
>
> SyntaxError: EOL while scanning single-quoted string>>> print ' sandeep "bhagwan " patil ,msc. java j2ee developer'
>
>  sandeep "bhagwan " patil ,msc. java j2ee developer
>
> >>> import posix
>
> Traceback (most recent call last):
>   File "<pyshell#4>", line 1, in <module>
>     import posix
> ImportError: No module named posix
>
> >>> phonebook = {'sandeep':9325,'amit':9822,'anand':9890}
> >>> phonebook = {'titu':9423,'dadu':9422,'giri':9326}
> >>> inverted_phonebook=invert(phonebook)
>
> Traceback (most recent call last):
>   File "<pyshell#7>", line 1, in <module>
>     inverted_phonebook=invert(phonebook)
> NameError: name 'invert' is not defined>>> def invert(table):
>
>     index={}
>     for key in table.key():
>         value=table[key]
>         if not index.has_key(value):
>             index[value]=[]
>         index[value].append(key)
>         return index
> ************************************************************************

Hi Sandeep.

As you are working with Python on Windows, I would suggest that you
install the Python for Windows extensions from here:

http://sourceforge.net/project/showfiles.php?group_id=78018

It includes a very good application called PythonWin. Once installed,
PythonWin will be available under Python in your Start menu.

If you run PythonWin, File/New gives you the option to create a new
Python script. To begin with, you can save into the Lib folder of your
Python installation (probably C:\Python25\Lib). I usually add my
initials at the front of the script name to differentiate my scripts
from the standard ones if I put stuff in Lib.

You should be able edit your PYTHONPATH variable in PythonWin - see
the Tools options (though, now I look, my installation actually has a
bug in this function), or alternatively, you can add a folder to your
PYTHONPATH environment variable in RegEdit (if you know what you're
doing).

I hope this helps.

J.



From http  Sat Mar 31 23:47:36 2007
From: http (Paul Rubin)
Date: 31 Mar 2007 20:47:36 -0700
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
	<yfsirchf04z.fsf@oc.ex.ac.uk>
	<1175387715.022063.171570@b75g2000hsg.googlegroups.com>
	<%4FPh.17001$PL.7906@newsread4.news.pas.earthlink.net>
	<mailman.5816.1175398860.32031.python-list@python.org>
Message-ID: <7x8xdcrc13.fsf@ruckus.brouhaha.com>

Michael Torrie <torriem at chem.byu.edu> writes:
> The no-service contract version of the GPL is not the same as the
> standard GPLv2.

I don't see how that can be--we're talking about a GCC-based compiler,
right?


From kyosohma at gmail.com  Mon Mar 26 14:16:03 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 11:16:03 -0700
Subject: how to abort on syntax errors
In-Reply-To: <mailman.5640.1174932471.32031.python-list@python.org>
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
	<1174930640.724685.72160@y80g2000hsf.googlegroups.com>
	<mailman.5640.1174932471.32031.python-list@python.org>
Message-ID: <1174932963.140902.195700@e65g2000hsc.googlegroups.com>

On Mar 26, 1:07 pm, Steve Holden <s... at holdenweb.com> wrote:
> kyoso... at gmail.com wrote:
> > On Mar 26, 12:21 pm, "Josh" <n... at nowhere.com> wrote:
> >> I have a lot of except Exception, e statements in my code, which poses some
> >> problems. One of the biggest is whenever I refactor even the triviallest
> >> thing in my code.
>
> >> I would like python to abort, almost as if it were a compile-time error,
> >> whenever it cannot find a function, or if I introduced a syntax error. But,
> >> instead, it merrily proceeds on its way.
>
> >> Is there some idiom that you use in situations like these?
> >> thanks,
> >> josh
>
> > Try sticking in an
>
> > try:
> >   #do something
> > except SyntaxError, e:
> >    print e
> >    sys.exit(0)
> > except Exception, e:
> >    print e
>
> > # You put in as many exceptions as you like.
>
> Of course the main problem with this solution is that a piece of code
> will raise a syntax error when it's compiled (i.e. at module import
> time, or when the main program starts up). So in the case where "#do
> something" has a syntax error it won;t be trapped because the program
> hasn't got to execution by the time the error is detected.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com

You're right, Mr. Holden. Drat! I stupidly assumed that he meant some
code executed first and then it'd hit one of his syntax errors. Either
way though, it would get "caught"...either by the interpreter (IDLE)
or the exception. At least, that's been my experience with syntax
errors.

I get a warning from IDLE that tells me there's an error at so-and-so.
Or the program just chokes and throws out and error after doing some
calculations and I learn once again that I didn't close a string.

Mike



From erikwickstrom at gmail.com  Fri Mar 30 17:34:02 2007
From: erikwickstrom at gmail.com (erikcw)
Date: 30 Mar 2007 14:34:02 -0700
Subject: I can't get multi-dimensional array to work...
In-Reply-To: <1175289837.359022.62220@o5g2000hsb.googlegroups.com>
References: <1175288195.207852.150320@p15g2000hsd.googlegroups.com>
	<1175289837.359022.62220@o5g2000hsb.googlegroups.com>
Message-ID: <1175290442.523224.129490@b75g2000hsg.googlegroups.com>

On Mar 30, 5:23 pm, FlipFish2... at yahoo.com wrote:
> On Mar 30, 4:56 pm, "erikcw" <erikwickst... at gmail.com> wrote:
>
>
>
> > Hi,
>
> > I'm trying to create a multidimensional data structure.  However, id
> > doesn't seem to work past the 2nd dimension.
>
> > Here is my method:
>
> > def endElement(self, name):
> >         if name == 'row' :
> >             if not self.data.has_key(self.parent):
> >                 self.data[self.parent] = {}
> >             elif not self.data[self.parent].has_key(self.child):
> >                 self.data[self.parent][self.child] = []
> >             self.data[self.parent]
> > [self.child].append((self.creativeid, self.clicks, self.imps))
>
> > I've tried all kinds of different variations, and I keep getting the
> > same result:
>
> > Traceback (most recent call last):
> >   File "sax.py", line 123, in ?
> >     parser.parse(open('report.xml'))
> >   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
> > line 109, in parse
> >     xmlreader.IncrementalParser.parse(self, source)
> >   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/xmlreader.py",
> > line 123, in parse
> >     self.feed(buffer)
> >   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
> > line 216, in feed
> >     self._parser.Parse(data, isFinal)
> >   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
> > line 315, in end_element
> >     self._cont_handler.endElement(name)
> >   File "sax.py", line 51, in endElement
> >     self.data[self.parent][self.child].append((self.creativeid,
> > self.clicks, self.imps))
> > KeyError: u'Pickup Trucks'
>
> > I have a lot of php experience - am I accidentally doing a "php thing"
> > in my code?
>
> > Thanks so much for your help!
>
> > Erik
>
> I haven't tested it, but superficially I'd suggest giving this a try:
>
> def endElement(self, name):
>         if name == 'row' :
>             if not self.data.has_key(self.parent):
>                 self.data[self.parent] = {}
>             if not self.data[self.parent].has_key(self.child):
>                 self.data[self.parent][self.child] = []
>             self.data[self.parent]
> [self.child].append((self.creativeid, self.clicks, self.imps))

That seems to have done the trick!  I can't believe I spent all
afternoon trying to figure that out!!  Thanks a million!



From nagle at animats.com  Thu Mar 22 12:37:28 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 22 Mar 2007 16:37:28 GMT
Subject: Regexp problem with `('
In-Reply-To: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
References: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
Message-ID: <chyMh.502$rO7.422@newssvr25.news.prodigy.net>

Johny wrote:
> I have  the following text
> 
> <title>Goods Item  146 (174459989)  - OurWebSite</title>
> 
> from which I need to extract
> `Goods Item  146 '
> 
> Can anyone help with regexp?
> Thank you for help
> L.

    In general, parsing HTML with regular expressions is a bad idea.
Usually, you use something like BeautifulSoup to parse the HTML,
extract the desired field, like the contents of "<title>", then
work on that.

    If you try to do this line by line with regular expressions,
it will fail when the line breaks aren't where you expect.  If
you try to do a whole document with regular expressions, other
material such as content in comments can be misrecognized.

     Try something like this:

	# Regular expression to extract group before "(NNNNN)"
	kreextractitem = re.compile(r'^(.*)\(\d+\))
	pagetree = BeautifulSoup.BeautifulSoup(stringcontaininghtml)
	titleitem = pagetree.find({'title':True, 'TITLE':True})
	if titleitem :
	    titletext = " ".join(atag.findAll(text=True, recursive=True))	
	    #	Text of TITLE item is now in "titletext" as a string.
	    groups = kreextractitem.search(titletext)
	    if groups :
		goodsitem = groups.group(1).strip()	
		# "goodsitem" now contains everything before "(NNNN)"


This approach will work no matter where the line breaks are in the original
HTML.

				John Nagle


From bbxx789_05ss at yahoo.com  Sat Mar 24 13:55:27 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 10:55:27 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <1174758927.095854.167030@e65g2000hsc.googlegroups.com>

Hi,

Robert Hicks wrote:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.
>
> Robert

I don't know if this is pertinent to your situation, but yesterday I
read something that said you need a "framework" install in order to do
GUI programming with wxPython.   I believe a framework install is what
originally comes with Macs and it is integrated into the OS.  I don't
know if there is a framework install for 2.5.

In addition, the download notes for the stand alone MacPython 2.5
install say that there aren't as many modules for 2.5 as there are for
the 2.4, which is something you may want to consider.



From sjdevnull at yahoo.com  Tue Mar  6 18:16:46 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 6 Mar 2007 15:16:46 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4730.1173218322.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
	<45ed41f7$0$21515$426a74cc@news.free.fr>
	<1173198244.092412.17400@n33g2000cwc.googlegroups.com>
	<mailman.4730.1173218322.32031.python-list@python.org>
Message-ID: <1173223006.632441.63620@t69g2000cwt.googlegroups.com>

On Mar 6, 4:58 pm, Ben Finney <bignose+hates-s... at benfinney.id.au>
wrote:
> "Martin Unsal" <martinun... at gmail.com> writes:
> > I think you should be asking yourselves, "Did we all abandon reload()
> > because it is actually an inferior workflow, or just because it's
> > totally broken in Python?"
>
> I never "abandoned reload()", because it never even occurred to me to
> use the interpreter for developing the code that I know is going to
> end up in a file anyway. That's what my text editor is for.

It's most useful for debugging for me; I'll instantiate the objects of
a known bad test case, poke around, maybe put some more debugging code
into one of my classes and re-instantiate only those objects (but keep
the rest of the test objects as-is).

Even there I find that I'd rather use a scratch file in an editor to
set up the test cases and send a specified region to the interpreter
for the most part, only actually typing in the interpreter when I'm
poking at an object.  I'll often wind up wanting to pull part of the
test case out either to go into the production code or to set up a
permanent unit test.

Once I figure out what's going on, the production code definitely gets
edited in the text editor.

Even though I use the interactive interpreter every day, though, I
haven't noticed reload being a major issue.



From NunezD at gmail.com  Fri Mar 16 15:35:14 2007
From: NunezD at gmail.com (hiro)
Date: 16 Mar 2007 12:35:14 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
Message-ID: <1174073714.798573.170630@p15g2000hsd.googlegroups.com>

Thanks a lot for the help guys, I'm at work right now and I will go
over your suggestions one by one this weekend.  Being more alert now,
taking a look at the examples you posted, I now see how to approach
this problem.  The thing with python that I'm starting to realize is
that there are a million different ways to approach a problem, so I
find it great for experimenting (when time allows) yet very
challenging to choose an approach.

Cheers,

h.



From trentm at activestate.com  Tue Mar 13 15:56:20 2007
From: trentm at activestate.com (Trent Mick)
Date: Tue, 13 Mar 2007 12:56:20 -0700
Subject: ANN: ActivePython 2.5.0.0 is now available
Message-ID: <45F701E4.4080404@activestate.com>

I'm happy to announce that ActivePython 2.5.0.0 is now available for download
from:
     http://www.activestate.com/products/activepython/

This is the first release of ActivePython for Python version 2.5. Apologies
for the long delay between core Python 2.5 and this release. The good news is
that part of the reason for this delay was to finally get approval to include
crypto in ActivePython, hence:

Changes in this release include:
- Full OpenSSL support (finally!)
- Update to Python 2.5 (duh)
- [Mac OS X] Universal build (finally!)
- [Windows] Update to PyWin32 build 210
- All the new standard extensions: SQLite, ctypes, ElementTree
- [Linux] Rationalized the build names.
- [Mac OS X] A sane uninstall script

See the release notes for full details:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/relnotes.html


What is ActivePython?
---------------------

ActivePython is ActiveState's binary distribution of Python. Builds for
Windows, Mac OS X, Linux, HP-UX and AIX are made freely available.

ActivePython includes the Python core and the many core extensions: zlib and
bzip2 for data compression, the Berkeley DB (bsddb) and SQLite (sqlite3)
database libraries, the Tix GUI widgets for Tkinter, ElementTree for XML
processing, ctypes (on supported platforms) for low-level library access, and
others. The Windows distribution ships with PyWin32 -- a suite of Windows
tools developed by Mark Hammond, including bindings to the Win32 API and
Windows COM. See this page for full details:
http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/whatsincluded.html

As well, ActivePython ships with a wealth of documentation for both new and
experienced Python programmers. In addition to the core Python docs,
ActivePython includes the "What's New in Python" series, "Dive into Python",
the Python FAQs & HOWTOs, and the Python Enhancement Proposals (PEPs).

An online version of the docs can be found here:
     http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/welcome.html

We would welcome any and all feedback to:
     ActivePython-feedback at activestate.com.com

Please file bugs against ActivePython at:
     http://bugs.activestate.com/query.cgi?set_product=ActivePython


On what platforms does ActivePython run?
----------------------------------------

ActivePython includes installers for the following platforms:

- AIX/PowerPC
- HP-UX/PA-RISC
- Linux/x86
- Linux/x86_64: "x86_64" is also known as "AMD64"
- Solaris/SPARC
- Solaris/x86
- Mac OS X
- Windows/x64: "x64" is also known as "AMD64"
- Windows/x86


Extra Bits
----------

ActivePython releases also include the following:

- ActivePython25.chm: An MS compiled help collection of the full
   ActivePython documentation set. Linux users of applications such as
   xCHM might find this useful. This package is installed by default on
   Windows.

Extra bits are available from:
     http://downloads.activestate.com/ActivePython/etc/


Thanks, and enjoy!

Trent, Python Tech Lead

--
Trent Mick
trentm at activestate.com



From aleax at mac.com  Thu Mar 29 11:34:54 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 08:34:54 -0700
Subject: manually implementing staticmethod()?
References: <1175115664.288706.183390@p77g2000hsh.googlegroups.com>
Message-ID: <1hvqagu.mn0e7yxfqvmrN%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> Hi,
> 
> Can someone show me how to manually implement staticmethod()?  Here is

Simplest way:

class smethod(object):
  def __init__(self, f): self.f=f
  def __call__(self, *a, **k): return self.f(*a, **k)


Alex


From bbbart at inGen.be  Sat Mar  3 16:38:58 2007
From: bbbart at inGen.be (Bart Van Loon)
Date: Sun, 4 Mar 2007 02:38:58 +0500
Subject: portable Python ifconfig
Message-ID: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>

Hi all,

I'm looking for a portable (FreeBSD and Linux) way of getting typical
ifconfig information into Python.

Some research on the web brought me to Linux only solutions

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/439094
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/439093

which I didn't manage to port to FreeBSD (I'm not that experienced).
Finally though, I found out about pyifconfig:

http://mail.python.org/pipermail/python-list/1999-August/009274.html

which compiles fine on Linux after changing <python1.5/Python.h> to
<python2.4/Python.h>. On FreeBSD there is no SIOCGIFHWADDR, so I
just commented out that part. 

I can now do

In [1]: from pyifconfig import pyifconfig

In [2]: pyifconfig('ath0')
Out[2]:
{'addr': '192.168.50.104',
 'brdaddr': '192.168.50.255',
 'hwaddr': '00:17:f2:4c:a5:0c',
 'netmask': '255.255.255.0'}

on Linux, and

In [1]: from pyifconfig import pyifconfig

In [2]: pyifconfig('vr1')
Out[2]:
{'addr': '192.168.50.1',
 'brdaddr': '192.168.50.255',
 'hwaddr': '\xff\xff',
 'netmask': '255.255.255.0'}

on FreeBSD.

The problem now is that I get seemingly random information when I pass a
non-existing interface, a down interface or an empty string to
pyifconfig, which is very hard to figure out from inside a script:

In [3]: pyifconfig('foobar')
Out[3]:
{'addr': '104.154.165.183',
 'brdaddr': '104.154.165.183',
 'hwaddr': '00:00:68:9a:a5:b7',
 'netmask': '104.154.165.183'}

so, any pointers here on how I can go on from this point?

any help is appreciated

-- 
regards,
BBBart

   Wormwood : Calvin, how about you?  
   Calvin : Hard to say ma'am. I think my cerebellum just fused.


From jstroud at mbi.ucla.edu  Sat Mar  3 18:22:10 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 03 Mar 2007 23:22:10 GMT
Subject: pop method question
In-Reply-To: <pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
Message-ID: <CqnGh.6368$re4.4381@newssvr12.news.prodigy.net>

Steven D'Aprano wrote:
> I personally don't see that pop has any advantage, especially since the
> most useful example
> 
> while some_dict:
>     do_something_with(some_dict.pop()) 
> 
> doesn't work. Instead you have to write this:
> 
> for key in some_dict.keys(): 
>     # can't iterate over the dictionary directly!
>     do_something_with(some_dict.pop(key))
> 
> which is hardly any saving over:
> 
> for key in some_dict.keys(): 
>     # can't iterate over the dictionary directly!
>     do_something_with(some_dict[key])
>     del some_dict[key]
> 
> 
> To my mind, having to supply a key to dict.pop makes it rather pointless.
> 
> 


I've used it in something like this and found it worthwhile:

for akey in dict1:
   if some_condition(akey):
     dict2[akey] = dict2.pop(akey)

Which necessitates a key is a little cleaner than your latter example.


From sgeiger at ncee.net  Sun Mar 25 03:06:21 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Sun, 25 Mar 2007 02:06:21 -0500
Subject: Using remote source code
In-Reply-To: <1174801187.128393.238840@o5g2000hsb.googlegroups.com>
References: <1174795795.112606.21720@e65g2000hsc.googlegroups.com>	<1hvi1i4.11qqgaq109btn3N%aleax@mac.com>
	<1174801187.128393.238840@o5g2000hsb.googlegroups.com>
Message-ID: <46061F6D.40909@ncee.net>

Alex,

I see that you aren't using ihooks.  Below is an example I found that 
uses ihooks.  I think it would be worth comparing and contrasting both 
approaches (though I am not familar enough with this aspect of Python to 
do so).  IIRC, this code addresses some path related issues of other 
import-from-file methods.

Note: This might not work from within ipython, but it works from within 
Python.





"""


The ihooks module
This module provides a framework for import replacements. The idea is to 
allow several alternate
import mechanisms to co-exist.

Example: Using the ihooks module
"""


import os
def writefile(f, data, perms=750): open(f, 'w').write(data) and 
os.chmod(f, perms)

foobar = """
print "this is from the foobar module"

def x():
    print "This is the x function."

"""

writefile('/tmp/foobar.py', foobar)


# File:ihooks-example-1.py
import ihooks, imp, os, sys
def import_from(filename):
    "Import module from a named file"
    if not os.path.exists(filename):
        sys.stderr.write( "WARNING: Cannot import file." )
    loader = ihooks.BasicModuleLoader()
    path, file = os.path.split(filename)
    name, ext = os.path.splitext(file)
    m = loader.find_module_in_dir(name, path)
    if not m:
        raise ImportError, name
    m = loader.load_module(name, m)
    return m

foo = import_from("/tmp/foobar.py")

print foo.x
print foo.x()
print foo.x()




pyapplico at gmail.com wrote:
> On Mar 25, 3:20 pm, a... at mac.com (Alex Martelli) wrote:
>   
>> <pyappl... at gmail.com> wrote:
>>     
>>> Is there any possible way that I can place a .py file on the internet,
>>> and use that source code in an .py file on my computer?
>>>       
>> You can write an import hook in any way you like; see
>> <http://www.python.org/dev/peps/pep-0302/> .
>>
>> Here's a trivial example (bereft of much error checking, etc).  I've
>> uploaded tohttp://www.aleax.it/foo.pya toy module w/contents:
>>
>> def foo(): return 'foo'
>>
>> Here's a tiny program to import said module from my site:
>>
>> import urllib2, sys, new
>>
>> theurl = 'http://www.aleax.it/'
>>
>> class Examp(object):
>>     names = set([ 'foo', ])
>>     def find_module(self, fullname, path=None):
>>         if fullname not in self.names: return None
>>         self.foo = urllib2.urlopen(theurl+fullname+'.py')
>>         return self
>>     def load_module(self, fullname):
>>         module = sys.modules.setdefault(fullname,
>>                                           new.module(fullname))
>>         module.__file__ = fullname
>>         module.__loader__ = self
>>         exec self.foo.read() in module.__dict__
>>         return module
>>
>> def hooker(pathitem):
>>     print 'hooker %r' % pathitem
>>     if pathitem.startswith(theurl): return Examp()
>>     raise ImportError
>>
>> sys.path_hooks.append(hooker)
>> sys.path.append(theurl)
>>
>> import foo
>> print foo.foo()
>>
>> Alex
>>     
>
> Thanks for your help, now I can continue building my source code
> generator. :)
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From nszabolcs at gmail.com  Wed Mar 14 05:38:32 2007
From: nszabolcs at gmail.com (Szabolcs Nagy)
Date: 14 Mar 2007 02:38:32 -0700
Subject: python/C++ wrapper
In-Reply-To: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
Message-ID: <1173865112.666847.288360@l75g2000hse.googlegroups.com>

> - A c++ program receives a 2D-matrix from python as input and gives a
> 2D-matrix as output back to python.

pyogre uses swig

ogre is a 3d realtime rendering engine written in c++ so there are
many matrix manipulation there and also pyogre does not modify the
original code

cgkit is a computer graphics toolkit written in c++ for python and it
uses boost-python and it uses matrices as well

if you want matrix manipulations in python then you may want to look
into numpy c api



From jgodoy at gmail.com  Sun Mar 25 13:45:18 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 25 Mar 2007 14:45:18 -0300
Subject: organizing collections of small modules
References: <mailman.5586.1174841115.32031.python-list@python.org>
Message-ID: <878xdl5ia9.fsf@gmail.com>

"Eric S. Johansson" <esj at harvee.org> writes:

> I have a bunch of small modules that I use within my application.  Most of
> these modules are single file modules.  Currently, I have them set up as
> stand-alone modules but because it's a royal pain to fetch five or 10 of these
> modules for each application and tracking whether or not they are all up to
> date, I'm considering putting them all into one collection (rcsoc
> a.k.a. random cross-section of code[1]) so it's easier to load, install, and
> manage.
>
> Are there better techniques for managing collections of modules in 2.4 or
> later?
>
> ---eric
>
>
> [1]  derives from the expression that hamburger is "random cross-section of
> cow"

I'm using setuptools for that.  If they're somehow connected --
e.g. mathematics, database, finance, etc. -- then I create one single package
for them.  If they aren't, then creating several packages isn't hard.

If they are useful enough you can publish them on PyPI and then it is just a
matter of "easy_install" them.  If they aren't then you'll have to collect
them somewhere to use easy_install ;-)

It also supplies means to determine the minimum / maximum / exact version that
is required, so this also helps with how up-to-date your library has to be to
be used with some application.


-- 
Jorge Godoy      <jgodoy at gmail.com>


From deets at nospam.web.de  Tue Mar 13 04:18:58 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 Mar 2007 09:18:58 +0100
Subject: Request for a change in the csv module.
In-Reply-To: <1173747644.616698@jubilee.claranet.pt>
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
	<1173747644.616698@jubilee.claranet.pt>
Message-ID: <55n53lF25s78sU1@mid.uni-berlin.de>

Paulo da Silva schrieb:
> attn.steven.kuo at gmail.com escreveu:
>> On Mar 12, 4:26 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> ...
> 
>> locale.setlocale(locale.LC_NUMERIC, 'pt_BR.ISO8859-1')
>> csv_writer = csv.writer(open("foo.csv","w"), dialect='excel')
>> rows = (('testing', 1.23), ('testing', 2.34))
>> formatted_rows = ((string, locale.format('%g', number)) for
>> (string,number) in rows)
>> csv_writer.writerows(formatted_rows)
> 
> 
> That works but it is a pain to use.

Why? I think it's straightforward.

> May be I'll sublass csv or even I'll write one myself.
> It would be much better to be able to specify an additional
> variabel to the Dialect class and change csv.

I don't think so. The csv module is about the subtleties that can occur 
when parsing textual data with possible escape chars and the like, and 
creating that data.

But IHMO its up to the user to feed it with just textual data. Because 
automatically converting numbers falls flat on it's face in case of 
special requirements like a limit on the number of digits to render and 
the like. Better do that in a simple and straightforward preprocessing 
state, as shown above.

The same is essentially true for dates as well, btw. How do you want to 
deal with them?

Diez


From bdesth.quelquechose at free.quelquepart.fr  Fri Mar  2 18:32:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 03 Mar 2007 00:32:05 +0100
Subject: classes and functions
In-Reply-To: <mailman.4613.1172874373.32031.python-list@python.org>
References: <mailman.4613.1172874373.32031.python-list@python.org>
Message-ID: <45e8ac13$0$6795$426a74cc@news.free.fr>

Silver Rock a ?crit :
> Friends,
> 
> I don?t see why using classes.. functions does everything already. I
> read the Rossum tutotial and two other already.
> 
> Maybe this is because I am only writing small scripts, or some more
> serious misunderstandings of the language.

or both ?-)

If you only write small scripts, then you may not have a use for 
classes. OTOH, everything in Python (including functions) is an object - 
that is, an instance of a class. So as soon as you're coding in Python, 
you are at least using classes one way or another. The nice thing is 
that you can safely ignore this if doesn't make sens to you !-)

One of the benefit of classes is that they allow you to have many 
instances of the same object, each with it's own values - while if you 
only use functions + global variables (to share state between 
functions), you only have one set of values (one 'instance') at a time. 
This is probably no big deal in your case, but it becomes quite useful 
as soon as your scripts start to turn into a full blown application.

My 2 cents...


From steven.ge at gmail.com  Sat Mar  3 17:25:24 2007
From: steven.ge at gmail.com (jitasi)
Date: 3 Mar 2007 14:25:24 -0800
Subject: are there any "Piecewise Cubic Hermite Interpolating Polynomial" in
	python
Message-ID: <1172960724.090104.187690@z35g2000cwz.googlegroups.com>

Hi all

I want to use the matlab function "pchip" in python.
I have checked the scipy, but there is only spline Interpolating.
Are there any pchip Interpolating in python?

Thanks
Steven



From kyosohma at gmail.com  Fri Mar 16 15:37:10 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 16 Mar 2007 12:37:10 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <1174073546.381358.129050@o5g2000hsb.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<1174073546.381358.129050@o5g2000hsb.googlegroups.com>
Message-ID: <1174073825.652273.175290@n76g2000hsh.googlegroups.com>

On Mar 16, 2:32 pm, "Paul McGuire" <p... at austin.rr.com> wrote:
> On Mar 16, 12:59 pm, tkp... at hotmail.com wrote:
>
>
>
> > I have an ordered list e.g. x = [0, 100, 200, 1000], and given any
> > positive integer y, I want to determine its appropriate position in
> > the list (i.e the point at which I would have to insert it in order to
> > keep the list sorted. I can clearly do this with a series of if
> > statements:
>
> > if y<x[1]:
> >     n = 0
> > elif y < x[2]:
> >     n = 1
> > elif y < x[3]:
> >     n = 2
> > else:
> >     n = 3
>
> > Or with a generator comprehension
> > n  = sum ( y>x[i] for i in range(len(x)) ) - 1
>
> > But there  has to be a cleaner way, as the first approach is unwieldy
> > and does not adapt to changing list lengths, and the second is not
> > obvious to a casual reader of the code.
>
> > My list will typically have 2 to 5 items, so speed is not a huge
> > issue. I'd appreciate your guidance.
>
> > Sincerely
>
> > Thomas Philips
>
> List "will typically have 2 to 5 items"?  Keep it simple!
>
> x.append(y)
> x.sort()
>
> -- Paul

I thought doing an append and sort was a good idea too, but the
question entailed knowing the insertion point, so I skipped it.
Thanks!



From psdasilvaX at esotericaX.ptX  Sat Mar 17 19:48:06 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 17 Mar 2007 23:48:06 +0000
Subject: Still the __new__ hell ...
In-Reply-To: <1174169283.313703.157020@n59g2000hsh.googlegroups.com>
References: <1174167360.522350@jubilee.claranet.pt>
	<1174169283.313703.157020@n59g2000hsh.googlegroups.com>
Message-ID: <1174175255.203550@jubilee.claranet.pt>

Arnaud Delobelle escreveu:
> On Mar 17, 9:31 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
...

>> I used __new__ to
>> subclass date class but now cPickle/pickle loads
>> does not work.
>>
>> from datetime import date
>> import cPickle,string
>>
>> class MyDate(date):
>>         def __new__(cls,year,month=None,day=None):
>>                 if type(year) is str:
>>                         year,month,day=map(int,string.split(year,'-'))
>>                 if year<100:
>>                         year+=2000
>>                 return date.__new__(cls,year,month,day)
>>
>> class C1(object):
>>         def __init__(self):
>>                 self.x=MyDate("2007-3-15")
>>
>>         def f(self):
>>                 print self.x
>>
>> c1=C1()
>>
>> d=cPickle.dumps(c1)
>> c2=cPickle.loads(d)
>> c2.f()
> 
> I haven't tried your code but I think that you may need to define a
> __reduce__ method in your MyDate class in order to give a clue to the
> python as to how to pickle its instances.  For more details see:
> 
> http://docs.python.org/lib/node321.html
> 
> Something like:
> 
> class MyDate(date):
>     ...
>     def __reduce__(self):
>         return type(self), (self.year, self.month, self.day)
> 
> might solve your problem.
> 
> HTH
> 
> --
> Arnaud
> 

Thanks. This works exactly the way you wrote.
Yet I am misunderstanding something. Can't pickle "see" that being
MyDate derived from date it also has to look at variables from date?
When do I need to do this? I am using pickle with a lot more complex
classes without this problem.

Thank you
Paulo


From andi.clemens at gmx.net  Thu Mar  1 02:25:01 2007
From: andi.clemens at gmx.net (Andi Clemens)
Date: Thu, 01 Mar 2007 08:25:01 +0100
Subject: How to update DNS record
Message-ID: <es5v6v$pv8$1@online.de>

Hi,

I want to update our DNS servers periodically with some IP addresses. But I
don't know how to do this.
I searched the Internet quite a while but I haven't found a good example how
to do this.
I want to change the A-Record for some IPs, this shouldn't be too hard.
I looked at dnspython and twisted, but I really don't have a clue how to do
this.
Has anyone done this before?

Andi


From nagle at animats.com  Sun Mar  4 13:03:18 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 04 Mar 2007 10:03:18 -0800
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
In-Reply-To: <mailman.4653.1173030677.32031.python-list@python.org>
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>	<45eab67a@news.vo.lu>	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
	<mailman.4653.1173030677.32031.python-list@python.org>
Message-ID: <IRDGh.2764$iw4.51@newssvr23.news.prodigy.net>

skip at pobox.com wrote:
 > The distutils setup.py script checks for ncurses bits

    No, it just plows on after compiler errors.

> As another person pointed out, you're conflating Python proper with a
> specific Linux distribution's packaging techniques. 

    Exactly.  As I've pointed out before, Python doesn't play well with
others.  The Python developers pass the buck to the Linux packager, the
Linux packager passes the buck to the Python developers, and thus
the user experience sucks.

    Debian seems to have struggled through this problem, but Red Hat
apparently just decided to give up keeping up with Python versions.

				John Nagle


From mail at microcorp.co.za  Wed Mar 28 01:55:20 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 28 Mar 2007 07:55:20 +0200
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com><1174052358.486071.163280@e65g2000hsc.googlegroups.com><46018fd8$0$18018$426a74cc@news.free.fr><q8oMh.15081$tD2.3516@newsread1.news.pas.earthlink.net>
	<46091cdf$0$19664$426a74cc@news.free.fr>
Message-ID: <014f01c77101$12056d40$03000080@hendrik>

 "Bruno Desthuilliers" <bruno.42.desthuilliers at wtf.web...uro.oops.com> wrote:


>Dennis Lee Bieber a ?crit :
>> On Wed, 21 Mar 2007 21:40:51 +0100, Bruno Desthuilliers
>> <bdesth.quelquechose at free.quelquepart.fr> declaimed the following in
>> comp.lang.python:
>>>
>> For future reference, and I hope you don't mind the lesson,

>I don't.

>> the past
>> tense of "bind" is "bound"

>err... I knew that, of course.

If one were to apply Dennis' ..ind to ..ound rule in reverse,
then the present tense of the verb "hound"
will be "hind" - bound to be..

English is such a a marvellously logical, consistent language.

For instance, there is a disease of the lungs called phthisis,
which is pronounced something like: "tie-sis"...

Pretty obvious of course, as is the pronounciation of the
name:  "Cholmondely"

- Hendrik




From irstas at gmail.com  Tue Mar 27 14:45:54 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 27 Mar 2007 11:45:54 -0700
Subject: How can I catch all exception in python?
In-Reply-To: <1175019354.070308.4080@l77g2000hsb.googlegroups.com>
References: <1175018958.602131.145190@y80g2000hsf.googlegroups.com>
	<1175019354.070308.4080@l77g2000hsb.googlegroups.com>
Message-ID: <1175021154.251183.95270@e65g2000hsc.googlegroups.com>

On Mar 27, 9:15 pm, kyoso... at gmail.com wrote:
> Technically speaking, you can catch all errors as follows:
>
> try:
>    # do something
> except Exception, e:
>    print e

That won't catch exceptions/errors that don't derive from
Exception class. For example a string won't be caught:

try:
   raise "foo"
except Exception, e:
   print e

But this will catch all exceptions:

try:
   raise "foo"
except:
   print sys.exc_info()

(there may be other ways I don't know of)



From parsons.nicholas1 at gmail.com  Fri Mar  2 19:44:13 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Fri, 2 Mar 2007 19:44:13 -0500
Subject: Newbie Test
Message-ID: <52EF9783-B8D1-429D-8A46-4A1A638B115B@gmail.com>

Greetings,

This is just a test to see if I can post to this mailing list.  Can  
someone from the list please respond to this email so I know it worked?

Thanks in advance!
--Nick


From laurent.pointal at wanadoo.fr  Fri Mar 30 17:35:02 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Fri, 30 Mar 2007 23:35:02 +0200
Subject: clean up html document created by Word
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
Message-ID: <460d815e$0$27386$ba4acef3@news.orange.fr>

jd wrote:

> I am looking for python code (working or sample code) that can take an
> html document created by Microsoft Word and clean it up (if you've
> never had to look at a Word-generated html document, consider yourself
> lucky ;-)  Alternatively, if you know of a non-python solution, I'd
> like to hear about it.
> 
> Thanks...
> 
> -- jeff

demoroniser - correct moronic and gratuitously incompatible HTML generated
by Microsoft applications

http://www.fourmilab.ch/webtools/demoroniser/

Unless you want to write your own with Python.



From john at datavoiceint.com  Fri Mar 16 13:09:15 2007
From: john at datavoiceint.com (HMS Surprise)
Date: 16 Mar 2007 10:09:15 -0700
Subject: Importing
In-Reply-To: <45faaa14$0$6762$426a74cc@news.free.fr>
References: <1174052001.880975.165780@b75g2000hsg.googlegroups.com>
	<45faaa14$0$6762$426a74cc@news.free.fr>
Message-ID: <1174064955.255610.267310@l77g2000hsb.googlegroups.com>

Thanks for posting. I continued to read and realized the instantiation
was not a function call soon after I posted. Oh well...

Still unsure about the best way to break up the large #start - #end
section. I appreciate your answers and try to digest them more fully.
Then maybe I will have a better idea and can post better qualified/
quantified questions.

Thanks again,

jh



From gert.cuykens at gmail.com  Sun Mar  4 07:24:06 2007
From: gert.cuykens at gmail.com (gert)
Date: 4 Mar 2007 04:24:06 -0800
Subject: html sql client
In-Reply-To: <1172910433.162735.46960@h3g2000cwc.googlegroups.com>
References: <1172813239.754095.231900@p10g2000cwp.googlegroups.com>
	<pan.2007.03.02.06.33.54.662626@gmx.net>
	<1172820787.946209.88810@n33g2000cwc.googlegroups.com>
	<1172910433.162735.46960@h3g2000cwc.googlegroups.com>
Message-ID: <1173011046.679061.195080@p10g2000cwp.googlegroups.com>

http://sourceforge.net/projects/dfo/

Added some firefox2 ajax technologies to it and made it xhtml 1.1
valid :)






From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 00:04:36 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 14:04:36 +1000
Subject: functions, classes, bound, unbound?
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.25.04.04.36.426329@REMOVE.THIS.cybersource.com.au>

On Sat, 24 Mar 2007 20:24:36 -0700, 7stud wrote:

> Here is some example code that produces an error:
> 
> class Test(object):
>         def greet():
>                 print "Hello"
> 
> t = Test()
> t.greet()
> TypeError: greet() takes no arguments (1 given)
> 
> Ok.  That makes sense.  t.greet() is a "bound method", so something
> automatically relays the instance object to greet(), and since greet()
> is defined with no parameters-->Error.
> 
> Hmmm...I know from testing several examples that if I call a function
> that's defined inside a class, and I use the class name preceding the
> function call, then I have to send the instance manually.  So, based
> on that error message, I'll just call the method using the class name
> and not send the instance object:
> 
> Test.greet()
> 
> TypeError: unbound method greet() must be called with Test instance as
> first argument (got nothing instead)


Is there a question hidden there somewhere, or are you just reporting on a
fact you have learned and are excited about?


Instance methods always need a self parameter, even if you call them from
the class. That's why you have to provide the instance by hand if you call
them from the class.

If you are trying to create a method that doesn't take a self argument,
have a look at the staticmethod function. There's also a classmethod
function as well.



-- 
Steven.



From bdesth.quelquechose at free.quelquepart.fr  Fri Mar  2 20:36:19 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sat, 03 Mar 2007 02:36:19 +0100
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <45e8c931$0$8646$426a34cc@news.free.fr>

Shawn Milo a ?crit :
> I'm new to Python and fairly experienced in Perl, although that
> experience is limited to the things I use daily.
> 
> I wrote the same script in both Perl and Python, and the output is
> identical. The run speed is similar (very fast) and the line count is
> similar.
> 
> Now that they're both working, I was looking at the code and wondering
> what Perl-specific and Python-specific improvements to the code would
> look like, as judged by others more knowledgeable in the individual
> languages.
> 
> I am not looking for the smallest number of lines, or anything else
> that would make the code more difficult to read in six months. Just
> any instances where I'm doing something inefficiently or in a "bad"
> way.
> 
(snip)
> 
> #! /usr/bin/env python
> 
> import sys
> 
> input = sys.stdin
> 
> recs = {}
> 
> for row in input:
>     row = row.rstrip('\n')
>     piid = row.split('\t')[0]
>     if recs.has_key(piid) is False:

'is' is the identity operator - practically, in CPython, it compares 
memory addresses. You *dont* want to use it here.

Another way to test if a key is already in a dict is to use the 'in' 
operator, ie:
       if not piid in recs:

>         recs[piid] = []
>     recs[piid].append(row)

As a last point, dicts have a setdefault(key, default) method that 
returns the value associated with key if it already exists, else add the 
key=>default pair and returns default, but it's a little bit slower.


for row in input:
     row = row.rstrip('\n')
     piid = row.split('\t')[0]
     recs.setdefault(piid, []).append(row)

or

for row in input:
     row = row.rstrip('\n')
     piid = row.split('\t')[0]
     if piid not in recs:
         recs[piid] = []
     recs[piid].append(row)



> for piid in recs.keys():

You don't need to call key() here - it's already the default iteration 
for dicts.

But since you want the values too, you should use dict.items() or 
dict.iteritems():

for piid, rows in recs.iteritems()

>     best = ""
>     for current in recs[piid]:
>         if best == "":
>             best = current;

Get rid of this ";" !-)

Better to use None - it's the "no value" object, and it let you use an 
identity test:

        best = None
        for current in rows:
           if best is None:
               best = row

And while we're at it, you can save yourself a test here:

        best = row[0]
        for current in row[1:]:
           # start tests

>             #If the current record is the correct state
>             if current.split("\t")[1] == current.split("\t")[6]:
>                 #If the existing record is the correct state
>                 if best.split("\t")[1] == best.split("\t")[6]:
>                     #If the new record has a newer exp. date
>                     if current.split("\t")[5] > best.split("\t")[5]:

You're repeatingly calling split() on the same objects. This is a 
serious waste of time and CPU.

>                         best = current
>                 else:
>                     best = current
>             else:
>                 #If the existing  record does not have the correct state
>                 #and the new record has a newer exp. date
>                 if best.split("\t")[1] != best.split("\t")[6] and
> current.split("\t")[5] > best.split("\t")[5]:
>                     best = current
>            
>     print best

Here's a somewhat corrected version:
# ---
import sys

def findbests(input=sys.stdin, output=sys.stdout):
     DATE = 5
     TARGET = 6
     STATE = 1
     recs = {}

     for row in input:
         row = row.rstrip('\n').split("\t")
         piid = row[0]
         if piid not in recs:
             recs[piid] = []
         recs[piid].append(row)

     for piid, rows in recs.iteritems():
         best = rows[0]
         for current in rows[1:]:
             if current[STATE] == current[TARGET]:
                 if best[STATE] == best[TARGET]:
                     if current[DATE] > best[DATE]:
                         best = current
                 else:
                     best = current
             elif best[STATE] != best[TARGET] \
                  and current[DATE] > best[DATE]:
                 best = current

         print >> output, "\t".join(best)

if __name__ == '__main__':
     findbdest()

# ---

It's somewhat shorter, a bit more readable IMHO, and somewhat faster too 
(=~ 30/40% faster on my machine). Also, it's usable as both a program 
and an importable module, and with any line input and file-like output.

Now for the bad news: I'm afraid your algorithm is broken : here are my 
test data and results:

input = [
     #ID  STATE ...  ...  ... TARG DATE
     "aaa\tAAA\t...\t...\t...\tBBB\t20071212\n",
     "aaa\tAAA\t...\t...\t...\tAAA\t20070120\n",
     "aaa\tAAA\t...\t...\t...\tAAA\t20070101\n",
     "aaa\tAAA\t...\t...\t...\tBBB\t20071010\n",
     "aaa\tAAA\t...\t...\t...\tBBB\t20071111\n",
     "ccc\tAAA\t...\t...\t...\tBBB\t20071201\n",
     "ccc\tAAA\t...\t...\t...\tAAA\t20070101\n",
     "ccc\tAAA\t...\t...\t...\tBBB\t20071212\n",
     "ccc\tAAA\t...\t...\t...\tAAA\t20071212\n", # oops !
     "bbb\tAAA\t...\t...\t...\tAAA\t20070101\n",
     "bbb\tAAA\t...\t...\t...\tAAA\t20070101\n",
     "bbb\tAAA\t...\t...\t...\tAAA\t20071212\n",
     "bbb\tAAA\t...\t...\t...\tAAA\t20070612\n",
     "bbb\tAAA\t...\t...\t...\tBBB\t20071212\n",
     ]

=>
aaa	AAA	...	...	...	BBB	20071212
bbb	AAA	...	...	...	BBB	20071212
ccc	AAA	...	...	...	BBB	20071201

At least for piid 'ccc', there's a record with matching state and newest 
date. (exact same result as with your original version).

HTH


From jgodoy at gmail.com  Sat Mar 10 09:45:09 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sat, 10 Mar 2007 11:45:09 -0300
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
Message-ID: <87r6rxkvii.fsf@gmail.com>

"jupiter" <anil.jupiter9 at gmail.com> writes:

> Hi guys!!!
>
>
> Just one quick question... Which database module should I use when I
> want to use multi threading as my application requires lots of data
> from internet ???? I also want this database module to be fast, simple
> n efficient, in any case multi threading capabilities are # 1
> requirement.

For which database server?

-- 
Jorge Godoy      <jgodoy at gmail.com>


From aspineux at gmail.com  Sat Mar 17 20:13:14 2007
From: aspineux at gmail.com (aspineux)
Date: 17 Mar 2007 17:13:14 -0700
Subject: tkinter grid vs pack
In-Reply-To: <eth2n4$c7d$1@ss408.t-com.hr>
References: <eth2n4$c7d$1@ss408.t-com.hr>
Message-ID: <1174176794.279331.96900@e1g2000hsg.googlegroups.com>

On 18 mar, 16:49, Gigs_ <g... at hi.t-com.hr> wrote:
> For what is grid better than pack, and otherwise?
>
> thanks in advance

Grid are useful to align items vertically _AND_ horizontally !
For example to make adialog box with label of different length

Firstname: John__________
Lastname: Smith__________
Contry: Uk__________

to align vertically Firstname and John , Lastname and Smith ....
But ALSO horizontaly John, Smith and Uk !



From skip at pobox.com  Sun Mar  4 12:52:46 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 4 Mar 2007 11:52:46 -0600
Subject: How use XML parsing tools on this one specific URL?
In-Reply-To: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <17899.1902.949251.452086@montanaro.dyndns.org>


    Chris> http://moneycentral.msn.com/companyreport?Symbol=BBBY

    Chris> I can't validate it and xml.minidom.dom.parseString won't work on
    Chris> it.

    Chris> If this was just some teenager's web site I'd move on.  Is there
    Chris> any hope avoiding regular expression hacks to extract the data
    Chris> from this page?

Tidy it perhaps or use BeautifulSoup?  ElementTree can use tidy if it's
available.

Skip


From myTesterFrench at gmail.com  Sat Mar 17 13:50:47 2007
From: myTesterFrench at gmail.com (myTesterFrench at gmail.com)
Date: 17 Mar 2007 10:50:47 -0700
Subject: read a web page using python
Message-ID: <1174153847.939415.169620@o5g2000hsb.googlegroups.com>

Hi All,

Kindly, could you someone tell me how to read a page(any web site)
using Python, what method to be used ?

Paris



From gagsl-py2 at yahoo.com.ar  Wed Mar 21 02:08:23 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 21 Mar 2007 03:08:23 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
Message-ID: <op.tpizb9xfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 01:58:05 -0300, John Pye <john.pye at gmail.com> escribi?:

> Hmm. Reading this again I think I understand properly now. The
> 'fileno' is really *not* the same thing as the FILE* pointer cast to
> an integer. It is a lower-level structure.
Just an integer. But as Ross Ridge has pointed out, it's not an OS thing  
on Windows, it's faked by the C runtime.

> The question is now, if I don't want to modify my *python* code, how
> do I get at the 'fileno' property of my PyFileObject?

 From Python, calling the fileno() method. From C, using  
fileno(PyFile_AsFile(your_file_object))
And then, using get_osfhandle(fd)

> Also, are there consequences for using this approach of regenerating
> the FILE struct? For example if I have the following:
>
> F = os.tmpfile()
> F.write("some data")
> F.seek(0)
> myswigmodule.dosomething(F)
> F.seek(0)
> S = F.read()
> print S

Just try it and let us know what happens! :)

> I don't know enough about this low-level file handling to really
> understand the implications of what you are proposing -- perhaps you
> could explain a little?

It's too late (for me) now, but if you can't make it work I'll try an  
example tomorrow.

-- 
Gabriel Genellina



From n00m at narod.ru  Sat Mar 17 14:05:23 2007
From: n00m at narod.ru (n00m)
Date: 17 Mar 2007 11:05:23 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174075514.144163.211660@o5g2000hsb.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<1174075514.144163.211660@o5g2000hsb.googlegroups.com>
Message-ID: <1174154723.569760.256000@y66g2000hsf.googlegroups.com>

i have no NumPy to test it...
without Psyco Anton's code is the winner: ~48sec vs ~58sec of my code
But with Psyco my runtime is ~28sec; Anton's - ~30sec (PC: 1.6 ghz,
512 mb)
Not so bad.. keeping in mind that 256000 billions quadruplets to
check :)


import psyco, time
psyco.full()
t = time.clock()

def main():
  q,w,e,r,sch,h = [],[],[],[],0,{}

  f = open("D:/m4000.txt","rt")
  for o in range(f.readline()):
    row = map(int, f.readline().split())
    q.append(row[0])
    w.append(row[1])
    e.append(row[2])
    r.append(row[3])
  f.close()

  for x in q:
    for y in w:
      if h.has_key(x+y):
        h[x+y] += 1
      else:
        h[x+y] = 1

  for x in e:
    for y in r:
      if h.has_key(-(x+y)):
        sch += h[-(x+y)]

  q,w,e,r,h = None,None,None,None,None
  print sch

main()
print time.clock() - t



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Mar 28 19:51:07 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 29 Mar 2007 01:51:07 +0200
Subject: how can I clear a dictionary in python
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com>
Message-ID: <570dbbF28iktlU1@mid.individual.net>

Aahz wrote:

> Go back and read Christian's post, then post a followup explaning
> why his solution is better than yours.  Your explanation should
> use id(). 

I wonder how you two seem to know exactly what the OP wants ...

Regards,


Bj?rn

-- 
BOFH excuse #335:

the AA battery in the wallclock sends magnetic interference



From cfbolz at gmx.de  Wed Mar 28 04:38:18 2007
From: cfbolz at gmx.de (Carl Friedrich Bolz)
Date: Wed, 28 Mar 2007 10:38:18 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175041489.368797.281750@d57g2000hsg.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175041489.368797.281750@d57g2000hsg.googlegroups.com>
Message-ID: <460A297A.5030605@gmx.de>

Hi Luis!

Luis M. Gonz?lez wrote:
 > Carl Friedrich Bolz wrote:
 >> ==========================================
 >> PyPy 1.0: JIT compilers for free and more
 >> ==========================================
[snip]
 >
 >
 > Congratulations!

Thanks :-)

 > I just have a couple of questions:
 >
 > Attempting to execute pypy-c.exe (precompiled binary for Windows),
 > raise an error message indicating that it cannot find gc_pypy.dll.
 > Have you missed something or I'm doing something wrong?

Brain error on our side: the gc_pypy.dll is the dll of the Boehm garbage
collector, which you would need to compile yourself (which makes
precompiled binaries a bit useless :-) ). We updated the zip file, would
you mind checking whether it works better now?

 > Regarding the jit integration, do you have any rough idea of when will
 > it speed up arbitrary code, other than integer aritmethic?

Relatively soon. The hard bits of that are done, the JIT compiler
generator is in a pretty good shape, we need to apply it to more parts
of the PyPy Python interpreter. There are some non-coding related
reasons why we are not doing it _right_ now: we still need to write some
EU-reports (about the JIT for example) then we will need a while to
recover from the EU project.

Cheers,

Carl Friedrich Bolz



From __peter__ at web.de  Fri Mar 30 02:39:19 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Mar 2007 08:39:19 +0200
Subject: Python 2.5 fails where 2.4 works when running external program
References: <Ft6dnSSOy5taOJHbnZ2dnUVZ_uednZ2d@comcast.com>
Message-ID: <euibag$7sh$03$1@news.t-online.com>

Heikki Toivonen wrote:

> We have successfully used a script to run external programs for several
> years. Now we upgraded our Python to 2.5, and are hitting a mysterious
> error.
> 
> The expected output from the sample script (see below) with 2.4 looks
> like this:
> 
> ret ['5\n']
> else
> ********************
> ExternalCommandErrorWithOutputList 1 ['Traceback (most recent call
> last):\n', '  File "<string>", line 1, in ?\n', 'ZeroDivisionError:
> integer division or modulo by zero\n']
> ********************
> ret ['6\n', '7\n', '8\n']
> else
> ********************
> 
> With 2.5 we get:
> 
> ret ['5\n']
> else
> ********************
> Exception 'int' object is not iterable
> Traceback (most recent call last):
>   File "...test.py", line 43, in <module>
>     ret = executeCommandReturnOutput(cmd)
>   File "...test.py", line 6, in __init__
>     self.args = args[0]
> TypeError: 'int' object is not iterable
> 
> ********************
> ret ['6\n', '7\n', '8\n']
> else
> ********************
> 
> What is going on? How do we fix this? We'd like to be able to run with
> both python 2.4 and 2.5.

I think Exception.args always was supposed to be a tuple. Starting with 2.5
Python enforces that constraint:

[Python2.4]
>>> e = Exception()
>>> e.args
()
>>> e.args = "abc"
>>> e.args
'abc'
>>> e.args = 1
>>> e.args
1

[Python 2.5]
>>> e = Exception()
>>> e.args
()
>>> e.args = "abc"
>>> e.args
('a', 'b', 'c')
>>> e.args = 1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'int' object is not iterable

The quick fix is of course

>>> e.args = [1]

but also note that according to the tutorial

http://docs.python.org/tut/node10.html#SECTION0010300000000000000000
"""
But use of .args is discouraged. Instead, the preferred use is to pass a
single argument to an exception (which can be a tuple if multiple arguments
are needed) and have it bound to the message attribute. 
"""

Peter



From kpierce8 at gmail.com  Thu Mar  8 18:42:45 2007
From: kpierce8 at gmail.com (kpierce8 at gmail.com)
Date: 8 Mar 2007 15:42:45 -0800
Subject: Coding a scheduled journal application
Message-ID: <1173397365.189973.121680@t69g2000cwt.googlegroups.com>

I'm a python newbie and would like to develop a tiny application to
schedule a document to open in a text processor and ask a question.
I'd like to be able to give it multiple time:question pairs such as
(monday 1:00pm : "Please enter your completed tasks for the morning?).
It could just open a dialog box with a big text entry area and the
question, then append a text file after a submit command. I guess the
question is how to get it to run in the background and pop-up at the
appropriate times?



From hipertracker at filtr.gmail.com  Thu Mar 22 17:26:07 2007
From: hipertracker at filtr.gmail.com (Jaroslaw Zabiello)
Date: Thu, 22 Mar 2007 21:26:07 +0000
Subject: ZSI, SOAP and .NET web services - problem
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
	<mailman.5472.1174585474.32031.python-list@python.org>
Message-ID: <vrltgjbpuvhd$.dlg@zabiello.com>

Dnia Thu, 22 Mar 2007 18:44:31 +0100, Laszlo Nagy napisa?(a):

> However, it is an interesting question.  Ruby has smaller community, 
> how could they implement a standard SOAP lib?

Yes. It is interesting why it is so difficult to make it working for
Python.

> My personal opinion is that SOAP is a piece of shit itself. It is 
> hampered from the beginning. If you are interested why, read this:
> 
> http://wanderingbarque.com/nonintersecting/2006/11/15/the-s-stands-for-simple/ 

Hehe, it was good. :)


> XML-RPC is a fantastic, often undervalued protocol. You can create a 
> new, secure XML-RPC server in Python within 5 minutes. You can write a 
> client for it within one minue. It is REALLY simple. I'm using it 
> continuously.
> 
> In contrast, SOAP is overcomplicated and anything but simple. No one 
> should create new web services using SOAP. We have enough problems with 
> the existing ones. :-(

I agree. The problem is, I have to live with this stupid, poor implemented
M$ technology. Ruby and with its standard SOAP library is able to live. Why
Python cannnot? 

-- 
Jaroslaw Zabiello
http://blog.zabiello.com


From skip at pobox.com  Mon Mar 19 22:16:35 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 19 Mar 2007 21:16:35 -0500
Subject: an enumerate question
In-Reply-To: <1174356075.710324.321150@b75g2000hsg.googlegroups.com>
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
	<7xr6rkr8gw.fsf@ruckus.brouhaha.com>
	<1174356075.710324.321150@b75g2000hsg.googlegroups.com>
Message-ID: <17919.17411.693380.650988@montanaro.dyndns.org>


    eight> thanks for replying. sorry i make clear again.
    eight> say
    eight> for n,l in enumerate(open("file")):
    eight>    print n,l # this prints current line
    eight>    print next line in this current iteration of the loop.

Off the top of my head, I'd try something like:

    class TwoLiner:
        def __init__(self, f):
            self.f = f

        def __iter__(self):
            return self

        def next(self):
            line1 = self.f.next()
            line2 = self.f.next()
            return (line1, line2)

    for n, (line1, line2) in enumerate(TwoLiner(open("file")):
        print n, line1
        print line2

Note that this has and end-of-file problem.  When your file contains an odd
number of lines, at the end of the file TwoLiner.next will raise
StopIteration during the second self.f.next() call and you'll lose the last
line of the file.  You can work around it with something like this:

        def next(self):
            line1 = self.f.next()
            try:
                line2 = self.f.next()
            except StopIteration:
                line2 = None
            return (line1, line2)

then when using it you have to test line2 for None:

    for n, (line1, line2) in enumerate(TwoLiner(open("file")):
        print n, line1
        if line2 is not None:
            print line2

Skip


From durumdara at gmail.com  Mon Mar 26 03:21:16 2007
From: durumdara at gmail.com (durumdara)
Date: Mon, 26 Mar 2007 09:21:16 +0200
Subject: Unicode zipping from Python code?
Message-ID: <4607746C.3010809@gmail.com>

Hi!

As I experienced in the year 2006, the Python's zip module is not 
unicode-safe.
With the hungarian filenames I got wrong result.
I need to convert iso-8859-2 to cp852 chset to get good result.
As I see, this module is "a command line tool" imported as extension.

Now I search for something that can handle the characters good, or 
handle the unicode filenames.

Does anyone knows about a python project that can do this?
Or other tool what I can use for zipping intern. characters?

Thanks for your help!

    dd



From kyosohma at gmail.com  Fri Mar 30 14:34:50 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 11:34:50 -0700
Subject: Object Oriented Database with interface for Pyhton
In-Reply-To: <euj4kb$rqo$2@news2.u-psud.fr>
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
	<1175247009.786698.72390@l77g2000hsb.googlegroups.com>
	<460ce036$0$1390$426a74cc@news.free.fr>
	<mn.f3567d73834c7f3d.46195@XX.XmclaveauX.com>
	<euj4kb$rqo$2@news2.u-psud.fr>
Message-ID: <1175279690.282360.35660@l77g2000hsb.googlegroups.com>

On Mar 30, 8:51 am, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> MC a ?crit :
>
> > Salut!
>
> > Heureusement qu'il y a qq fran?ais pour faire un peu de m?nage...
>
> Question de d?calage horaire ?

Here is a list of all the popular database interface modules:

http://www.python.org/topics/database/modules.html

And then there's always Zope's database.

Mike



From mark at freelance-developer.com  Fri Mar 23 17:27:25 2007
From: mark at freelance-developer.com (Mark Nenadov)
Date: Fri, 23 Mar 2007 17:27:25 -0400
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
Message-ID: <pan.2007.03.23.21.27.25.328509@freelance-developer.com>

On Fri, 23 Mar 2007 15:11:35 -0600, Matt Garman wrote:


> 
> Is this "just the way it is" or am I overlooking something obvious?
> 


Matt,

If you iterate over even the smallest object instantiation a large amount
of times, it will be costly compared to a simple list append.

I don't think you can get around some overhead with the objects.

However, in terms of generally efficiency not specifically related to
object instantiation, you should look into xreadlines().

I'd suggest doing the following instead of that while loop: 

for line in open(sys.argv[1]).xreadlines():
  ..


-- 
Mark Nenadov -> skype: marknenadov, web: http://www.marknenadov.com
-> "Glory is fleeting, but obscurity is forever." -- Napoleon Bonapart



From collver at peak.org  Mon Mar 26 20:20:08 2007
From: collver at peak.org (Ben Collver)
Date: Mon, 26 Mar 2007 17:20:08 -0700
Subject: osx tkinter listbox problem
In-Reply-To: <eu9dgr$itg$1@daisy.noc.ucla.edu>
References: <nbednXit24cYWprbnZ2dneKdnZydnZ2d@scnresearch.com>
	<eu9dgr$itg$1@daisy.noc.ucla.edu>
Message-ID: <upSdnSt9C-Cm_pXbnZ2dnUVZ_sKunZ2d@scnresearch.com>

James Stroud wrote:
> A "cross platform" work-around might be to grid a frame at the row and 
> column of self.Main and pack the Listbox into the Frame. I don't have a 
> Mac at work to test this, however. But I would be curious to know your 
> results if you try it.

Thank you for the sub-frame suggestion.  I tried, but it didn't help.

Ben


From gagsl-py2 at yahoo.com.ar  Tue Mar 27 18:09:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 Mar 2007 19:09:12 -0300
Subject: pattern search
References: <mailman.5671.1175008459.32031.python-list@python.org>
	<56sqtbF29auttU2@mid.uni-berlin.de>
	<1175018282.059201.3200@d57g2000hsg.googlegroups.com>
	<56the2F28t97kU1@mid.uni-berlin.de>
Message-ID: <op.tpvbtmuzx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 Mar 2007 18:42:15 -0300, Diez B. Roggisch <deets at nospam.web.de>  
escribi?:

> Paul McGuire schrieb:
>> On Mar 27, 10:18 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
>>> Fabian Braennstroem wrote:
>>>>                 while iter:
>>>>                     value = model.get_value(iter, 1)
>>>>                     if value.endswith("."+ pattern): [...]
>>>>
>>>> Now, I would like to improve it by searching for different 'real'
>>>> patterns just like using 'ls' in bash. E.g. the entry
>>>> 'car*.pdf' should select all pdf files with a beginning 'car'.
>>>> Does anyone have an idea, how to do it?

>>> Use regular expressions. They are part of the module "re". And if you  
>>> use them, ditch your code above, and make it just search for a pattern  
>>> all the time. Because the above is just the case of
>>> *.ext

>> The glob module is a more direct tool based on the OP's example.  The
>> example he gives works directly with glob.  To use re, you'd have to
>> convert to something like "car.*\.pdf", yes?

> I'm aware of the glob-module. But it only works on files. I was under
> the impression that he already has a list of files he wants to filter
> instead of getting it fresh from the filesystem.

In that case the best way would be to use the fnmatch module - it already  
knows how to translate from car*.pdf into the right regexp. (The glob  
module is like a combo os.listdir+fnmatch.filter)

-- 
Gabriel Genellina



From hitesh287 at gmail.com  Sun Mar 18 00:38:34 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 17 Mar 2007 21:38:34 -0700
Subject: List to string
In-Reply-To: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
Message-ID: <1174192714.014092.79380@l77g2000hsb.googlegroups.com>

On Mar 18, 12:28 am, "Hitesh" <hitesh... at gmail.com> wrote:
> Hi,
>
> I've a list like this..
> str1 = ['this is a test string inside list']
>
> I am doing it this way.
>
> for s in str1:
>     temp_s = s
>     print temp_s
>
> Any better suggestions?
>
> Thank you,
> hj

I want to cast value of a list into string..



From gagsl-py2 at yahoo.com.ar  Tue Mar 20 19:07:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 20:07:03 -0300
Subject: Subject line with smtplib.sendmail()
References: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com>
	<etotbk$b1c$1@sea.gmane.org>
	<09042D621CD4AA479C678463F3A646D0E884D5@sottemail1.ent.ad.cognos.com>
	<09042D621CD4AA479C678463F3A646D0E884E5@sottemail1.ent.ad.cognos.com>
Message-ID: <op.tpift1wix6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 15:18:01 -0300, Boudreau, Emile  
<Emile.Boudreau at cognos.com> escribi?:

> Sorry folks. Scrape the last one that I sent. I noticed that it sends
> the email perfectly if the code is not in any of my methods but the
> second I insert it into a method I get the ugly email that I described
> in my last email.
>
> Does anyone know how I can get this code in my method so that I have
> access to all the variables I have?

I don't understand exactly what you mean, but looking at your example:

>
> Working.on at server.com
> To:
> ------------------------------
> 	From: Working.On at server.com
> 	To: Emile.Boudreau at server.com
> 	Subject: Hello!
>
> 	This Still DOESN't Work!!!!!!!!!!!!
> 	
> It's just adding the "From" "To" "Subject" in the message itself. I want
> to have each field at the correct place and then just the msg in the
> body.

	Perhaps you are using an """indented
	triple quoted
	string""" ?

The indentation goes into the string itself. You may use a global (module)  
constant to hold the string, by example.

-- 
Gabriel Genellina



From timm.gloger at gmail.com  Thu Mar  1 08:33:13 2007
From: timm.gloger at gmail.com (Timm Florian Gloger)
Date: Thu, 1 Mar 2007 14:33:13 +0100
Subject: Python Tutorial
Message-ID: <19269e540703010533u329b2ac2sa82e5e219d7c98f5@mail.gmail.com>

Hi,

is Guido van Rossum's "Python Tutorial" in non-HTML formats (e.g. PDF
or PS) avaiable for free?

Regards,
Timm


From bdesth.quelquechose at free.quelquepart.fr  Tue Mar  6 19:12:17 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 07 Mar 2007 01:12:17 +0100
Subject: is it possible to give an instance a value?
In-Reply-To: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
Message-ID: <45edfb62$0$28523$426a74cc@news.free.fr>

manstey a ?crit :
> Hi,
> 
> My question probably reflects my misunderstanding of python objects,
> but I would still like to know the answer.
> 
> The question is, is it possible for an instnace to have a value (say a
> string, or integer) that can interact with other datatypes and be
> passed as an argument?

In Python, strings and integers *are* objects (instances of resp. str 
and int).

> The following code of course gives an error:
> 
> class Test(object):
>      def __init__(self, val):
>            self.val = val
> 
> 
>>>>a = Test('hello')
>>>>a.val  + ' happy'
> 
> 'hello happy'
> 
>>>>a + 'happy'
> 
> TypeError: unsupported operand type(s) for +: 'Test' and 'str'

No surprise so far.

> Is there a way to make a have the value a.val

Forget about the value/instance distinction - it doesn't exists in Python.

> when it is used as
> above, 

implement __add__ (and any other appropriate magic method)

> or as an argument (eg function(a, 10, 'sdf') etc)?
> 
> The only fudge I discovered for simple addition was to add to the
> class
> 
>    def __add__(self, obj):
>        return a.val + obj

So what's your problem exactly ?

> but this doesn't solve the problem in general. I have tried
> subclassing the string type, but as it is immutable, this is not
> flexible the way a.val is

Err... In your above example implementation, a.val actually *is* a string.

> (i.e. it can't e reassigned

???

a.val = "tutu"

> and remain a
> subclass).

???

> Any pointers, or is my question wrong-headed?

I'm afraid I don't get the point.

> btw, my motivation is wanting to mimic another oo language which
> allows this, so it allows:
>  
>>>>Person.Address
> 
> 'Sydney'
> 
>>>>Person.Address.type
> 
> '%String'
> 
>>>>Person.Address = 'Canberra'
>>>>print Person.Address. Person.Address.type
> 
> Canberra %String
> 
> etc.

> We have had to implement Person.Address as Person.Address.val, making
> Address an instance with .val, .type, etc.

 >>> class Person(object):
...     def __init__(self):
...             self.address = "sidney"
...
 >>> person = Person()
 >>> person.address
'sidney'
 >>> type(person.address)
<type 'str'>
 >>> # this is equivalent:
 >>> person.address.__class__
<type 'str'>
 >>> # of if you want the name of the class instead
 >>> # of the class object itself:
 >>> person.address.__class__.__name__
'str'
 >>>


Looks like you'd better learn the Python way instead of wasting your 
time trying to mimic some other language (BTW, is it VB or  C# ?).

HTH


From steve at holdenweb.com  Wed Mar 14 15:42:41 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 15:42:41 -0400
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <45F84AB8.2010504@gmx.net>
References: <45F843AD.6050509@gmx.net> <et9h7k$ehr$1@sea.gmane.org>
	<45F84AB8.2010504@gmx.net>
Message-ID: <et9ja8$lvp$1@sea.gmane.org>

Thomas Ploch wrote:
> Steve Holden schrieb:
>> Clearly if form['uploadfile'] is returning the client's path information 
>> you do have to remove that somehow before further processing, which also 
>> means you need to deduce what the client architecture is to correctly 
>> remove path data. Of course this also leaves open the question "what 
>> does a Mac client return?", and you might want to cater for that also.
> 
> I tested from linux and Mac OS, and on both os.path.basename() works as
> expected (since the server it runs on is a UNIX one). That brings me to
> the question, how Do I a) get the cients architecture and b) send the
> architecture of the client through cgi.FieldStorage()?
> 
Aah, right, I really meant MacOS 9 and preceding. There I understand 
that the path separator was a colon, which would really hose things up 
... let's assume you can ignore that.

>> I suspect you will also find that there are at least some circumstances 
>> under which a Unix browser will also include path information.
> 
> Which ones should that be? Since os.path.basename() _is_ doing the right
> thing on *nix style paths (Mac OS is not different there), I cant think
> of other circumstances.
> 
My remark was due to a misunderstanding. The path information *is* being 
sent by the browser, but os.path.basename() removes it:

  >>> os.path.basename("/a/b/c.f")
'c.f'

I would suggest that all you need to do is remove any leading "X:" 
(where X is any drive letter) and turn all backslashes into forward 
slashes before you apply the basename function. Something like this:

filename = form['uploadfile'].filename
if filename[1] == ":":
     filename = filename[2:]
filename = filename.replace("\\", "/")
filename = os.path.basename(filename)

> 
>> I presume you are looking to use the same filename that the user 
>> provided on the client? Does this mean that each user's files are 
>> stored in different directories? Otherwise it's not always a good idea 
>> to use filenames provided by the user for files on the server anyway.
> 
> Yes, each User has his own directory. Files get timestamped and then put
> into the corresponding directory. It is just that having
> 'C:\a\very\long\path\file.ext' as a filename on the server is not nice.
> 
I agree.

As long as there's no naming conflict between different users' files you 
shouldn't have any problem.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From hipertracker at filtr.gmail.com  Thu Mar 22 18:45:16 2007
From: hipertracker at filtr.gmail.com (Jaroslaw Zabiello)
Date: Thu, 22 Mar 2007 22:45:16 +0000
Subject: ZSI, SOAP and .NET web services - problem
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
	<mailman.5472.1174585474.32031.python-list@python.org>
	<vrltgjbpuvhd$.dlg@zabiello.com> <etutqu$c70$1@nemesis.news.tpi.pl>
Message-ID: <1dspyxngeu7mz$.dlg@zabiello.com>

Dnia Thu, 22 Mar 2007 22:48:26 +0100, Jarek Zgoda napisa?(a):

> If you really must write client for this service, go and do it in Ruby,
> if it works.

I cannot. I am using Pylons framework so I have to use Python. Ruby solves
this problem but not others, like its low speed.

-- 
Jaroslaw Zabiello
http://blog.zabiello.com


From bthom at cs.hmc.edu  Thu Mar 22 22:17:41 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Thu, 22 Mar 2007 19:17:41 -0700
Subject: class / instance question
In-Reply-To: <874poc3e1e.fsf@benfinney.id.au>
References: <96B6F7A8-E09A-433B-ACC8-EF90A66DBEC8@cs.hmc.edu>
	<874poc3e1e.fsf@benfinney.id.au>
Message-ID: <1040D39B-E568-4287-AF8C-688AFABFA218@cs.hmc.edu>


On Mar 22, 2007, at 7:10 PM, Ben Finney wrote:

>> abstract base class, where I've used an "abstract()" hack to
>> somewhat enforce this).
>
> You can use the 'NotImplemented' built-in object, or the
> 'NotImplementedError' exception, for this purpose:

Thanks---I'd forgotten about that.

>> I now want to be able to pass either of these classes into a game-
>> playing engine, for instance a function
>>
>> playGame(classOfGameToBePlayed) :
>>     # inside of which I create a new game using that class's  
>> constructor
>>
>> Is this possible, and if so, how to approach it?
>
> It works just as you describe. The class is an object, that can be
> passed as an argument just like any other object. That object is
> callable, and invokes the class constructor to return a new instance
> of the class.
>
>     def play_game(game_class):
>         """ Play a new game """
>         game = game_class()
>         game.start_play()

Aha....I was trying things like:

game_class.__init__(...)

which complained then about self.

Figured there had to be a way. Many thanks---you've saved me some time.

--b


From skip at pobox.com  Mon Mar 19 18:39:18 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 19 Mar 2007 17:39:18 -0500
Subject: coverage.py problem
In-Reply-To: <1174337929.621691.307390@p15g2000hsd.googlegroups.com>
References: <1174337929.621691.307390@p15g2000hsd.googlegroups.com>
Message-ID: <17919.4374.192994.456090@montanaro.dyndns.org>


    Orin> I have a problem in using coverage.py module in my project:

You might want to contact Ned Batchelder, the author:

    http://nedbatchelder.com/code/modules/coverage.html

Skip


From claudio.grondi at freenet.de  Fri Mar 30 19:53:18 2007
From: claudio.grondi at freenet.de (Claudio Grondi)
Date: Sat, 31 Mar 2007 01:53:18 +0200
Subject: clean up html document created by Word
In-Reply-To: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
Message-ID: <euk7td$o7s$1@newsreader3.netcologne.de>

jd wrote:
> I am looking for python code (working or sample code) that can take an
> html document created by Microsoft Word and clean it up (if you've
> never had to look at a Word-generated html document, consider yourself
> lucky ;-)  Alternatively, if you know of a non-python solution, I'd
> like to hear about it.
> 
> Thanks...
> 
> -- jeff
> 
There is a Microsoft add-on for Word which helps to reduce the mess 
called 'HTML filter'. Go for it here:

http://www.microsoft.com/downloads/details.aspx?FamilyID=209ADBEE-3FBD-482C-83B0-96FB79B74DED&displaylang=EN

run it and then use afterwards the other in this thread suggested 
'cleaning' methods.

Claudio


From tismer at stackless.com  Wed Mar 28 10:59:25 2007
From: tismer at stackless.com (Christian Tismer)
Date: Wed, 28 Mar 2007 16:59:25 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <460A297A.5030605@gmx.de>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175041489.368797.281750@d57g2000hsg.googlegroups.com>
	<460A297A.5030605@gmx.de>
Message-ID: <6AFD137D-BE66-4BD6-84C5-0D473FCC3377@stackless.com>


On 28.03.2007, at 10:38, Carl Friedrich Bolz wrote:

> Brain error on our side: the gc_pypy.dll is the dll of the Boehm  
> garbage
> collector, which you would need to compile yourself (which makes
> precompiled binaries a bit useless :-) ). We updated the zip file,  
> would
> you mind checking whether it works better now?

Why can't we provide a pre-compiled binary?
Is this a license issue?

cheers - chris



From Graham.Dumpleton at gmail.com  Thu Mar  8 16:23:41 2007
From: Graham.Dumpleton at gmail.com (Graham.Dumpleton at gmail.com)
Date: 8 Mar 2007 13:23:41 -0800
Subject: Configuration: Apache + mod_python
In-Reply-To: <1173358972.661607.38290@t69g2000cwt.googlegroups.com>
References: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>
	<1173352699.270216.48800@s48g2000cws.googlegroups.com>
	<1173358972.661607.38290@t69g2000cwt.googlegroups.com>
Message-ID: <1173389021.382297.16370@v33g2000cwv.googlegroups.com>

On Mar 9, 12:02 am, "Danilo" <dbrab... at gmail.com> wrote:
> On 8 Mrz., 12:18, Graham.Dumple... at gmail.com wrote:
>
>
>
> > On Mar 8, 9:50 pm, "Danilo" <dbrab... at gmail.com> wrote:
>
> > > Hi there,
>
> > > is it possible to create a rewrite rule to send every server-request
> > > to the directory /py? But only if the file does not exists on the
> > > server.
>
> > > This is my mod_python section of the apache config-file.
>
> > > <Location "/py">
> > >         SetHandler python-program
> > >         PythonHandler django.core.handlers.modpython
> > >         PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
> > >         SetEnv DJANGO_SETTINGS_MODULE myapp.settings
> > >         PythonDebug Off
> > > </Location>
>
> > For the more general case of where a HTTP 404 error would otherwise be
> > returned, indicating that a resource could not be found, as opposed to
> > an actual physical file, you can just use:
>
> >   ErrorDocument 404 /py
>
> > This would be simpler than using mod_rewrite. I can't remember though
> > whether the handler when triggered in this case can change the
> > response status to something other than 404.
>
> > You could use mod_rewrite if you really must, but not sure how it
> > would interact with virtual resources managed by some handler where no
> > actual file exists. To be practical you would probably want to
> > restrict the scope of mod_rewrite to specific contexts.
>
> > Quoting an example from very good book "The Definitive Guide to Apache
> > mod_rewrite", you can do something similar to:
>
> >   RewriteEngine On
> >   # If its not here ...
> >   RewriteCond %{REQUEST_FILENAME} !-f
> >   RewriteCond %{REQUEST_FILENAME} !-d
> >   # Look here instead ...
> >   RewriteRule ^/images/(.*) /pics/$1 [PT]
>
> > In this case it is causing lookups for images to be made in two
> > places, but your case wouldn't be much different.
>
> > Graham
>
> The rewrite rule works, but now every request ist send to /py.
> This is my .conf:
>
> <VirtualHost *>
>         DocumentRoot /var/www/mydomain.com/htdocs
>         ServerName mydomain.com
>         ServerAliaswww.mydomain.com
>
>         <Location "/py">
>                 SetHandler python-program
>                 PythonHandler django.core.handlers.modpython
>                 PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
>                 SetEnv DJANGO_SETTINGS_MODULE myapp.settings
>                 PythonDebug Off
>         </Location>
>
>         RewriteEngine On
>         # If its not here...
>         RewriteCond %{REQUEST_FILENAME} !-f
>         RewriteCond %{REQUEST_FILENAME} !-d
>         # Look here instead...
>         RewriteRule (.*) /py$1 [PT]
>
>         ErrorLog /var/www/mydomain.com/logs/error.log
>         CustomLog /var/www/mydomain.com/logs/access.log common
> </VirtualHost>
>
> Any ideas what is wrong?

I did say you would probably need to restrict the scope of the
mod_rewrite rule to a specific context. In particular, put it inside
of a Directory directive corresponding to the file system directory
where your files live. Where you have it as the moment,
REQUEST_FILENAME probably will not resolve to anything as Apache
hasn't yet matched it to the filesystem. Thus:

  <Directory /some/path/to/document/root>

        RewriteEngine On
        # If its not here...
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteCond %{REQUEST_FILENAME} !-d
        # Look here instead...
        RewriteRule (.*) /py$1 [PT]


  </Directory>

Graham



From rterala at gmail.com  Thu Mar  8 16:21:24 2007
From: rterala at gmail.com (Ravi Terala)
Date: Thu, 08 Mar 2007 13:21:24 -0800
Subject: implementing SFTP using Python
In-Reply-To: <683868.19200.qm@web38806.mail.mud.yahoo.com>
References: <683868.19200.qm@web38806.mail.mud.yahoo.com>
Message-ID: <45F07E54.1070502@gmail.com>

Kiran,

You should look into Twisted Python and their Twisted Python Conch 
package. You might not need to reinvent the wheel.
http://twistedmatrix.com/trac/wiki/TwistedConch

Ravi

kadarla kiran kumar wrote:
> Hi Everybody,
>  
> I have to implement SFTP conection from client to the server using 
> Python script.
> Iam very new new to python , and i dont't have much time to complete 
> this. So I need some pointers from you.
>  
> If anybody has already done this kind of stuff, please let me know. 
> Please don't think Iam over ambitious, but i need some kind of Pseudo 
> code ,if possible source code.
>  
> Thanks in Advance,
> K.Kiran Kumar
> 
> ------------------------------------------------------------------------
> Never Miss an Email
> Stay connected with Yahoo! Mail on your mobile. Get started! 
> <http://us.rd.yahoo.com/evt=43909/*http://mobile.yahoo.com/services?promote=mail> 
> 
> 



From sturlamolden at yahoo.no  Sun Mar 18 14:17:22 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 18 Mar 2007 11:17:22 -0700
Subject: Webcams and python
In-Reply-To: <1174228881.417754.26020@e65g2000hsc.googlegroups.com>
References: <1174182674.500068.252550@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.08.24.46.950750@gmx.net>
	<1174228881.417754.26020@e65g2000hsc.googlegroups.com>
Message-ID: <1174241842.666367.25290@n76g2000hsh.googlegroups.com>

On Mar 18, 3:41 pm, "Synt4x" <ianmurr... at gmail.com> wrote:

> The problem with adding a sleep() instrucction is that the "video
> feed" looks lagged, if you know what I mean. It looks interrupted.

You could try win32api.Sleep(0) instead, which will release the
reminder of the time slice.



From sergio.correia at gmail.com  Wed Mar  7 17:27:04 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 7 Mar 2007 17:27:04 -0500
Subject: Best place for a function?
Message-ID: <f1aa6d810703071427g4735f009m579b807aa261fe49@mail.gmail.com>

I'm writing a class, where one of the methods is kinda complex. The
method uses a function which I know for certain will not be used
anywhere else. This function does not require anything from self, only
the args passed by the method.

Where should I put the function?

a) Inside the module but outside the class (to avoid cluttering it;
besides the function does not require to access any property or method
of the class).

# mymodule.py

def  _myfunction():
     ...

class myclass(object):
     def mymethod(self):
          ...
          spam = _myfunction()
    ...


b) Inside the class but outside the method

# mymodule.py

class myclass(object):
     def  _myfunction(self):
         ...

     def mymethod(self):
          ...
          spam = self._myfunction()
    ...

c) Inside the method:

# mymodule.py

class myclass(object):
     ...
     def mymethod(self):
         def  _myfunction(self):
                   ...
         ...
         spam = self._myfunction()
     ...


I'm new to python (and couldn't find anything about this in PEP 8).
What would you suggest me?

Thanks
Sergio


From kyosohma at gmail.com  Wed Mar 21 15:10:56 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 21 Mar 2007 12:10:56 -0700
Subject: parsing combination strings
In-Reply-To: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
Message-ID: <1174504256.409584.245810@n59g2000hsh.googlegroups.com>

On Mar 21, 1:42 pm, "PKKR" <superp... at gmail.com> wrote:
> I need a fast and efficient way to parse a combination string(digits +
> chars)
>
> ex: s = "12ABA" or "1ACD" or "123CSD" etc
>
> I want to parse the the above string such that i can grab only the
> first digits and ignore the rest of the chacters,
>
> so if i have s = "12ABA" , parser(s) should give me "12" or "1" or
> "123".
>
> I can think of a quick dirty way by checking each element in the
> string and do a 'str.isdigit()' and stop once its not a digit, but
> appreciate any eligent way.

Somehow you'll need to test each element in the string to know if it
is an integer or not. You could do the str.isdigit() method or you
could do something like this:

temp = ''
for i in yourString:
	try:
		int(i)
		temp += i
	except:
                pass


Maybe someone knows of a parser. However, that will likely be more
complex.

Mike



From michael at jedimindworks.com  Mon Mar 26 04:37:42 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Mon, 26 Mar 2007 03:37:42 -0500
Subject: Sending ECHO_REQUEST (pinging) with python
In-Reply-To: <pan.2007.03.26.06.30.33@gmail.com>
References: <pan.2007.03.26.06.30.33@gmail.com>
Message-ID: <68F5A34F-81D7-4DD9-B85A-93F5E1104851@jedimindworks.com>

On Mar 26, 2007, at 1:30 AM, Thomas Dybdahl Ahle wrote:
> Hi, I've writing a python application in which I'd like to have a  
> small
> "ping label", to always tell the current ping time to the server.
>
> It seems however that I have to be root to send those imcp  
> packages, but
> I guess there must be a workaround since I can easily use the "ping"
> command as ordinary user.
>
> Do anybody know how to do this in python?
>

This won't solve your privileges issue, but this seems to get the  
ping time to server:

import socket
import os
import sys
import struct
import time
import select

# Derived from ping.c distributed in Linux's netkit. That code is
# copyright (c) 1989 by The Regents of the University of California.
# That code is in turn derived from code written by Mike Muuss of the
# US Army Ballistic Research Laboratory in December, 1983 and
# placed in the public domain. They have my thanks.

# Bugs are naturally mine. I'd be glad to hear about them. There are
# certainly word-size dependenceies here.

# Copyright (c) Matthew Dixon Cowles, <http://www.visi.com/~mdc/>.
# Distributable under the terms of the GNU General Public License
# version 2. Provided with no warranties of any sort.

# Note that ICMP messages can only be sent from processes running
# as root.

# Revision history:
#
# November 22, 1997
# Initial hack. Doesn't do much, but rather than try to guess
# what features I (or others) will want in the future, I've only
# put in what I need now.
#
# December 16, 1997
# For some reason, the checksum bytes are in the wrong order when
# this is run under Solaris 2.X for SPARC but it works right under
# Linux x86. Since I don't know just what's wrong, I'll swap the
# bytes always and then do an htons().
#
# December 4, 2000
# Changed the struct.pack() calls to pack the checksum and ID as
# unsigned. My thanks to Jerome Poincheval for the fix.
#

# From /usr/include/linux/icmp.h; your milage may vary.
ICMP_ECHO_REQUEST = 8 # Seems to be the same on Solaris.

# I'm not too confident that this is right but testing seems
# to suggest that it gives the same answers as in_cksum in ping.c
def checksum(str):
     csum = 0
     countTo = (len(str) / 2) * 2
     count = 0
     while count < countTo:
         thisVal = ord(str[count+1]) * 256 + ord(str[count])
         csum = csum + thisVal
         csum = csum & 0xffffffffL # Necessary?
         count = count + 2

     if countTo < len(str):
         csum = csum + ord(str[len(str) - 1])
         csum = csum & 0xffffffffL # Necessary?

     csum = (csum >> 16) + (csum & 0xffff)
     csum = csum + (csum >> 16)
     answer = ~csum
     answer = answer & 0xffff

     # Swap bytes. Bugger me if I know why.
     answer = answer >> 8 | (answer << 8 & 0xff00)

     return answer

def receiveOnePing(mySocket, ID, timeout):
     timeLeft = timeout

     while 1:
         startedSelect = time.time()
         whatReady = select.select([mySocket], [], [], timeLeft)
         howLongInSelect = (time.time() - startedSelect)

         if whatReady[0] == []: # Timeout
             return -1

         timeReceived = time.time()
         recPacket, addr = mySocket.recvfrom(1024)
         icmpHeader = recPacket[20:28]
         typ, code, checksum, packetID, sequence = struct.unpack 
("bbHHh",
icmpHeader)

         if packetID == ID:
             bytesInDouble = struct.calcsize("d")
             timeSent = struct.unpack("d", recPacket[28:28 +
bytesInDouble])[0]
             return timeReceived - timeSent

         timeLeft = timeLeft - howLongInSelect

         if timeLeft <= 0:
             return -1

def sendOnePing(mySocket, destAddr, ID):
     # Header is type (8), code (8), checksum (16), id (16), sequence  
(16)
     myChecksum = 0

     # Make a dummy heder with a 0 checksum.
     header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, myChecksum,  
ID, 1)
     bytesInDouble = struct.calcsize("d")
     data = (192 - bytesInDouble) * "Q"
     data = struct.pack("d", time.time()) + data

     # Calculate the checksum on the data and the dummy header.
     myChecksum = checksum(header + data)

     # Now that we have the right checksum, we put that in. It's just  
easier
     # to make up a new header than to stuff it into the dummy.
     if sys.platform == 'darwin':
         myChecksum = socket.htons(myChecksum) & 0xffff
     else:
         myChecksum = socket.htons(myChecksum)

     header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0,
                         myChecksum, ID, 1)

     packet = header + data
     mySocket.sendto(packet, (destAddr, 1)) # Don't know about the 1

def doOne(destAddr, timeout=10):
     # Returns either the delay (in seconds) or none on timeout.
     icmp = socket.getprotobyname("icmp")
     mySocket = socket.socket(socket.AF_INET,socket.SOCK_RAW,icmp)
     myID = os.getpid() & 0xFFFF
     sendOnePing(mySocket, destAddr, myID)
     delay = receiveOnePing(mySocket, myID, timeout)
     mySocket.close()

     return delay


def ping(host, timeout=1):
     dest = socket.gethostbyname(host)
     delay = doOne(dest, timeout)
     return delay


Hope this helps,
Michael

---
The Rules of Optimization are simple.
Rule 1: Don't do it.
Rule 2 (for experts only): Don't do it yet.
-- Michael A. Jackson , "Principles of
Program Design", 1975.




From sgeiger at ncee.net  Sun Mar 25 02:57:39 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Sun, 25 Mar 2007 01:57:39 -0500
Subject: List comprehension returning subclassed list type?
In-Reply-To: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>
References: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>
Message-ID: <46061D63.4000203@ncee.net>

To the best of my understanding, this answers your question:

   iterable
          A container object capable of returning its members one at a
          time. Examples of iterables include all sequence types (such as
          list, str, and tuple) and some non-sequence types like dict and
          file and objects of any classes you define with an __iter__()
          or __getitem__() method. Iterables can be used in a for loop
          and in many other places where a sequence is needed (zip(),
          map(), ...). When an iterable object is passed as an argument
          to the builtin function iter(), it returns an iterator for the
          object. This iterator is good for one pass over the set of
          values. When using iterables, it is usually not necessary to
          call iter() or deal with iterator objects yourself. The for
          statement does that automatically for you, creating a temporary
          unnamed variable to hold the iterator for the duration of the
          loop. See also iterator, sequence, and generator.


bullockbefriending bard wrote:
> Given:
>
> class Z(object):
>     various defs, etc.
>
> class ZList(list):
>     various defs, etc.
>
> i would like to be able to replace
>
> z_list = ZList()
> for y in list_of_objects_of_class_Y:
>     z_list.append(y)
>
>
> with something like this:
>
> z_list = [Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y]
>
> Of course this just gives me a plain list and no access to the
> methodsof z_list. I could, of course go and write a static method in
> ZList which takes a plain list of Z objects and returns a ZList.
>
> Anyway, my question is whether or not this can be done more elegantly
> via list comprehension?
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From jon+usenet at unequivocal.co.uk  Wed Mar 21 06:07:20 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 21 Mar 2007 10:07:20 GMT
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
Message-ID: <slrnf020uo.on2.jon+usenet@snowy.squish.net>

In article <etpcon$1g8r$1 at ulysses.news.tiscali.de>, Stargaming wrote:
> from sys import version_info
> if version_info[0] < 2 or version_info[1] < 4:
>      raise RuntimeError("You need at least python2.4 to run this script")

That'll fail when the major version number is increased (i.e. Python 3.0).

You want:

  if sys.hexversion < 0x020400f0:
    ... error ...


From aahz at pythoncraft.com  Sun Mar 18 10:01:44 2007
From: aahz at pythoncraft.com (Aahz)
Date: 18 Mar 2007 07:01:44 -0700
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<T9AKh.13297$tD2.11703@newsread1.news.pas.earthlink.net>
	<1hv3735.f8r5bx3czob7N%aleax@mac.com>
	<yxMKh.8126$M65.601@newssvr21.news.prodigy.net>
Message-ID: <etjgo8$h7f$1@panix3.panix.com>

In article <yxMKh.8126$M65.601 at newssvr21.news.prodigy.net>,
John Nagle  <nagle at animats.com> wrote:
>Alex Martelli wrote:
>> Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
>>>
>>>Mastery and quickly are opposing terms <G> Took me 15 years on a job
>>>using FORTRAN 77 and I still wouldn't have called myself a master. (I'm
>>>more of a JoAT)
>> 
>> My favorite "Stars!" PRT, mind you -- but when some language interests
>> me enough, I do tend to "master" it... guess it's correlated with what
>> Brooks saw as the ideal "language lawyer" in his "surgical team"
>> approach, an intrinsic fascination with bunches of interconnected rules.
>
>    Python just isn't that complicated.  The syntax is straightforward,
>and the semantics are similar to most other dynamic object-oriented
>languages.  If you know Perl or Smalltalk or LISP or JavaScript, Python
>does about what you'd expect.

Yes and no.  At the time I learned Python, I was a Perl expert (but not
a master), and I had a bunch of other languages under my belt (including
Fortran, Pascal, C, Ada).  Nevertheless, for the first month of Python,
I found that I kept having problems because I tried to make Python fit
the mold of other languages rather than accepting it on its own terms.

(Admittedly, part of my problem was that I was learning Python under
duress -- I saw no reason to learn Yet Another Scripting Language.)

Then there are all the little odd corners of Python that stand in the
way of true mastery, like what happens with refcounts and exception
tracebacks.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From fabio.fzero at gmail.com  Wed Mar 14 14:34:20 2007
From: fabio.fzero at gmail.com (Fabio FZero)
Date: 14 Mar 2007 11:34:20 -0700
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
Message-ID: <1173897260.531843.171330@n59g2000hsh.googlegroups.com>

On Mar 13, 7:34 pm, "israph... at googlemail.com"
<israph... at googlemail.com> wrote:
> Hi all.
>
> I have a problem with some code :(
>
> -----------
>
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
>
> while (hint != 'n') or (hint != 'y'):
>     hint = raw_input("Please specify a valid choice: ")
>
> ---------------------------------------------
>
> so everytime I run the program, and enter my choice as y or n, I'm
> told to 'Please Specify a valid Choice Again' and can't get out of the
> loop.

Why don't you try this instead:

hint = raw_input("\nAre you stuck? y/n: ")
hint = hint.lower()

while not hint in 'yn':
    hint = raw_input("Please specify a valid choice: ")

[]s
FZero



From MonkeeSage at gmail.com  Sat Mar 10 19:40:54 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 16:40:54 -0800
Subject: number generator
In-Reply-To: <55fbgjF2492skU1@mid.individual.net>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
Message-ID: <1173573654.009953.266280@30g2000cwc.googlegroups.com>

On Mar 10, 3:16 am, greg <g... at cosc.canterbury.ac.nz> wrote:
> Another possibility is to generate a list of N non-random
> numbers that sum to M, and then adjust them up or down
> by random amounts. By performing up/down adjustments in
> pairs, you can maintain the sum invariant at each step.
> So then it's just a matter of how long you want to go
> on fiddling with them.

Taking your comment and running with it...this is pretty much
cheating, and requires that M be evenly divisible by N, and only works
well with smaller N values, and selections are limited to numbers in
the 1 to (M/N)+(M/N) range...but hey; other than that it's perfect,
heh.

import random
N, M = 10, 80
D    = M/N
O    = [D] * N
C    = []
for i in O:
    C.append(random.randint(1, D-1))
for i in range(0, len(O), 2):
    O[i] -= C[i]
    if i == len(O)-1:
        O[random.randint(0, i-1)] += C[i]
    else:
        O[i+1] += C[i]
assert sum(O) == M
assert len(O) == N

Regards,
Jordan



From jzgoda at o2.usun.pl  Wed Mar 28 17:36:08 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Wed, 28 Mar 2007 23:36:08 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <mailman.5685.1175032114.32031.python-list@python.org>
References: <mailman.5685.1175032114.32031.python-list@python.org>
Message-ID: <euenc1$fks$1@nemesis.news.tpi.pl>

Carl Friedrich Bolz napisa?(a):

> Welcome to the PyPy 1.0 release - a milestone integrating the results
> of four years of research, engineering, management and sprinting
> efforts, concluding the 28 months phase of EU co-funding!

So it took 4 yars of work and over 2 yaers of consumption of EU funds,
yeah, great.

Could anybody explain, what this gives to Python and its users? Would
we, eventually, get GIL-free VM, that is capable to consume all
available power of multicore processors? Or, maybe, we'll get something
special, I am unable to dream of? Or is it purely academic project to
create Python VM in Python?

-- 
Jarek Zgoda
http://jpa.berlios.de/


From gagsl-py2 at yahoo.com.ar  Sun Mar 25 12:42:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 13:42:04 -0300
Subject: Pycron for windows - please help
References: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>
	<op.tpgjoo2dx6zn5v@gabriel2.softlabbsas.com.ar>
	<mailman.5341.1174402667.32031.python-list@python.org>
	<1174828667.754481.216350@e65g2000hsc.googlegroups.com>
Message-ID: <op.tpq7cexex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 10:17:47 -0300, Al <bernala at gmail.com> escribi?:

>    I figured it out... Pycron does not work with mapped drives. My
> script was supposed to copy files from a mapped drive to a local
> folder... I had set up my batch command as copy M:\foldername\*.*,
> where M: is a mapped drive pointing to the network share; M: is
> defined on the PC running the Pycron service of course. I changed it
> to read copy \\servername\shares\foldername\*.* and now everything
> works correctly.

Mapped drives are per-user. Usually, services run under the LOCAL_SYSTEM  
account, not using the currently logged user (because they may start even  
before any user is logged). If you want the service to have access to your  
mapped drives, use the service control panel to make it run under another  
account.

-- 
Gabriel Genellina



From thinker at branda.to  Wed Mar 14 14:05:33 2007
From: thinker at branda.to (Thinker)
Date: Thu, 15 Mar 2007 02:05:33 +0800
Subject: Constructor of object
In-Reply-To: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
Message-ID: <45F8396D.6040909@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

inline wrote:
> Hello! I want to assign self to object of parent class in
> constructor, like
>
> def my_func(): ... return ParentClass()
>
> class MyClass (ParentClass): def __init__(self): self = my_func()
>
> but it not work, because "object not initialized". What i can do?
>
Do you want to call constructor of super-class to initialize the object?
If it is true, you have following options.

In old style class:
class MyClass(ParentClass):
def __init__(self):
ParentClass.__init__(self)

In new style class:
class MyClass(ParentClass):
def __init__(self):
super(MyClass).__init__(self)

Or
class MyClass(ParentClass):
def __init__(self):
super(MyClass, self).__init__()

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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Version: GnuPG v1.4.6 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFF+Dls1LDUVnWfY8gRAvDaAKDVmX8LmuWUdJ4eVil7l//rjCQZLQCg8dO8
Y77CL1ikmtdl6S3HD04GWiA=
=mvSe
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From gagsl-py2 at yahoo.com.ar  Thu Mar  1 18:11:50 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Mar 2007 20:11:50 -0300
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
Message-ID: <op.toi9d0p0x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 01 Mar 2007 14:42:00 -0300, <bayer.justin at googlemail.com> escribi?:

> BUT If I use PIPE for both (so I can .write() on the stdin and .read()
> from the subprocess' stdout stream (better: file descriptor)) reading
> from the subprocess stdout blocks forever. If I write something onto
> the subprocess' stdin that causes it to somehow proceed, I can read
> from its stdout.

On http://docs.python.org/lib/popen2-flow-control.html there are some  
notes on possible flow control problems you may encounter.
If you have no control over the child process, it may be safer to use a  
different thread for reading its output.

-- 
Gabriel Genellina



From olsonas at gmail.com  Tue Mar 13 14:04:50 2007
From: olsonas at gmail.com (Drew)
Date: 13 Mar 2007 11:04:50 -0700
Subject: Iterating across a filtered list
Message-ID: <1173809090.092546.255710@64g2000cwx.googlegroups.com>

All -

I'm currently writing a toy program as I learn python that acts as a
simple address book. I've run across a situation in my search function
where I want to iterate across a filtered list. My code is working
just fine, but I'm wondering if this is the most "elegant" way to do
this. Essentially, I'm searching the dict self.contacts for a key that
matches the pattern entered by the user. If so, I print the value
associated with that key. A pastie to the method is below, any help/
advice is appreciated:

http://pastie.caboo.se/46647

Side note: I'm learning python after ruby experience. In ruby I would
do something like:

contacts.find_all{|name,contact| name =~ /search/}.each{|name,contact|
puts contact}



From nobody at invalid.com  Tue Mar 27 12:49:18 2007
From: nobody at invalid.com (Erik Johnson)
Date: Tue, 27 Mar 2007 10:49:18 -0600
Subject: Numeric Soup
Message-ID: <46094afe$1@nntp.zianet.com>


    I am just starting to explore doing some scientific type data analysis
using Python, and am a little confused by the different incarnations of
modules (e.g., try Google("Python numeric").

    There is SciPy, NumPy, NumArray, Numeric...  I know some of these are
related and some are separate, some are oudated, etc. but can someone sort
of give a general run-down in layman's terms of what's what, what's used for
what, what depends on what, and what's current?

    At this point my interest is just sort of general, fast array
manipulation and DSP.

Thanks!





From luismgz at gmail.com  Tue Mar 27 20:24:49 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 27 Mar 2007 17:24:49 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <mailman.5685.1175032114.32031.python-list@python.org>
References: <mailman.5685.1175032114.32031.python-list@python.org>
Message-ID: <1175041489.368797.281750@d57g2000hsg.googlegroups.com>


Carl Friedrich Bolz wrote:
> ==========================================
> PyPy 1.0: JIT compilers for free and more
> ==========================================
>
> Welcome to the PyPy 1.0 release - a milestone integrating the results
> of four years of research, engineering, management and sprinting
> efforts, concluding the 28 months phase of EU co-funding!
>
> Although still not mature enough for general use, PyPy 1.0 materializes
> for the first time the full extent of our original vision:
>
> - A flexible Python interpreter, written in "RPython":
>
>    - Mostly unaware of threading, memory and lower-level target platform
>      aspects.
>    - Showcasing advanced interpreter features and prototypes.
>    - Passing core CPython regression tests, translatable to C, LLVM and
> .NET.
>
> - An advanced framework to translate such interpreters and programs:
>
>    - That performs whole type-inference on RPython programs.
>    - Can weave in threading, memory and target platform aspects.
>    - Has low level (C, LLVM) and high level (CLI, Java, JavaScript)
> backends.
>
> - A **Just-In-Time Compiler generator** able to **automatically**
>    enhance the low level versions of our Python interpreter, leading to
>    run-time machine code that runs algorithmic examples at speeds typical
>    of JITs!
>
> Previous releases, particularly the 0.99.0 release from February,
> already highlighted features of our Python implementation and the
> abilities of our translation approach but the **new JIT generator**
> clearly marks a major research result and gives weight to our vision
> that one can generate efficient interpreter implementations, starting
> from a description in a high level language.
>
> We have prepared several entry points to help you get started:
>
> * The main entry point for JIT documentation and status:
>
>     http://codespeak.net/pypy/dist/pypy/doc/jit.html
>
> * The main documentation and getting-started PyPy entry point:
>
>     http://codespeak.net/pypy/dist/pypy/doc/index.html
>
> * Our online "play1" demos showcasing various Python interpreters,
>    features (and a new way to program AJAX applications):
>
>     http://play1.codespeak.net/
>
> * Our detailed and in-depth Reports about various aspects of the
>    project:
>
>     http://codespeak.net/pypy/dist/pypy/doc/index-report.html
>
> In the next few months we are going to discuss the goals and form of
> the next stage of development - now more than ever depending on your
> feedback and contributions - and we hope you appreciate PyPy 1.0 as an
> interesting basis for greater things to come, as much as we do
> ourselves!
>
> have fun,
>
>      the PyPy release team,
>      Samuele Pedroni, Armin Rigo, Holger Krekel, Michael Hudson,
>      Carl Friedrich Bolz, Antonio Cuni, Anders Chrigstroem, Guido Wesdorp
>      Maciej Fijalkowski, Alexandre Fayolle
>
>      and many others:
>      http://codespeak.net/pypy/dist/pypy/doc/contributor.html
>
>
> What is PyPy?
> ================================
>
> Technically, PyPy is both a Python interpreter implementation and an
> advanced compiler, or more precisely a framework for implementing dynamic
> languages and generating virtual machines for them.
>
> The framework allows for alternative frontends and for alternative
> backends, currently C, LLVM and .NET.  For our main target "C", we can
> can "mix in" different garbage collectors and threading models,
> including micro-threads aka "Stackless".  The inherent complexity that
> arises from this ambitious approach is mostly kept away from the Python
> interpreter implementation, our main frontend.
>
> PyPy is now also a Just-In-Time compiler generator.  The translation
> framework contains the now-integrated JIT generation technology.  This
> depends only on a few hints added to the interpreter source and should
> be able to cope with the changes to the interpreter and be generally
> applicable to other interpreters written using the framework.
>
> Socially, PyPy is a collaborative effort of many individuals working
> together in a distributed and sprint-driven way since 2003.  PyPy would
> not have gotten as far as it has without the coding, feedback and
> general support from numerous people.
>
> Formally, many of the current developers were involved in executing an
> EU contract with the goal of exploring and researching new approaches
> to language and compiler development and software engineering.  This
> contract's duration is about to end this month (March 2007) and we are
> working and preparing the according final review which is scheduled
> for May 2007.
>
> For the future, we are in the process of setting up structures to help
> maintain conceptual integrity of the project and to discuss and deal
> with funding opportunities related to further PyPy sprinting and
> developments. See here for results of the discussion so far:
>
>      http://codespeak.net/pipermail/pypy-dev/2007q1/003577.html
>
>
> 1.0.0 Feature highlights
> ==============================
>
>
> Here is a summary list of key features included in PyPy 1.0:
>
> - The Just-In-Time compiler generator, now capable of generating the
>    first JIT compiler versions of our Python interpreter:
>
>     http://codespeak.net/pypy/dist/pypy/doc/jit.html
>
> - More Python interpreter optimizations (a CALL_METHOD bytecode, a method
>    cache, rope-based strings), now running benchmarks at around half of
>    CPython's speed (without the JIT):
>
>     http://codespeak.net/pypy/dist/pypy/doc/interpreter-optimizations.html
>
> - The Python interpreter can be translated to .NET and enables
>    interactions with the CLR libraries:
>
>     http://codespeak.net/pypy/dist/pypy/doc/cli-backend.html
>     http://codespeak.net/pypy/dist/pypy/doc/clr-module.html
>
> - Aspect Oriented Programming facilities (based on mutating the Abstract
>    Syntax Tree):
>
>     http://codespeak.net/pypy/dist/pypy/doc/aspect_oriented_programming.html
>
> http://codespeak.net/pypy/extradoc/eu-report/D10.1_Aspect_Oriented_Programming_in_PyPy-2007-03-22.pdf
>
> - The JavaScript backend has evolved to a point where it can be used to
>    write AJAX web applications with it. This is still an experimental
>    technique, though. For demo applications which also showcase various
>    generated Python and PROLOG interpreters, see:
>
>     http://play1.codespeak.net/
>
> - Proxying object spaces and features of our Python interpreter:
>
>    - Tainting: a 270-line proxy object space tracking and boxing
>      sensitive information within an application.
>
>    - Transparent proxies: allow the customization of both application and
>      builtin objects from application level code.  Now featuring an
>      initial support module (tputil.py) for working with transparent
>      proxies.
>
> For a detailed description and discussion of high level backends and
> Python interpreter features, please see our extensive "D12" report:
>
> http://codespeak.net/pypy/extradoc/eu-report/D12.1_H-L-Backends_and_Feature_Prototypes-2007-03-22.pdf
>
>
> Funding partners and organisations
> =====================================================
>
> PyPy development and activities happen as an open source project and
> with the support of a consortium partially funded by a 28 month
> European Union IST research grant for the period from December 2004 to
> March 2007. The full partners of that consortium are:
>
>      Heinrich-Heine University (Germany), Open End (Sweden)
>      merlinux GmbH (Germany), tismerysoft GmbH (Germany)
>      Logilab Paris (France), DFKI GmbH (Germany)
>      ChangeMaker (Sweden), Impara (Germany)


Congratulations!
I just have a couple of questions:

Attempting to execute pypy-c.exe (precompiled binary for Windows),
raise an error message indicating that it cannot find gc_pypy.dll.
Have you missed something or I'm doing something wrong?

Regarding the jit integration, do you have any rough idea of when will
it speed up arbitrary code, other than integer aritmethic?

Thanks and regards,
Luis



From gregorywieber at gmail.com  Fri Mar 30 18:38:26 2007
From: gregorywieber at gmail.com (gregorywieber at gmail.com)
Date: 30 Mar 2007 15:38:26 -0700
Subject: Newbie Question (real-time communication between apps: audio, 3d, PD,
	Blender)
Message-ID: <1175294306.124030.272350@l77g2000hsb.googlegroups.com>

Hi All,

I'm just beginning my exploration of Python and I have a rather
general question. If two particular programs have Python scripting
capabilities, does that mean those two programs can communicate in
real time through Python?

I'm running some audio experiments (for artistic purposes) in the
program Pure Data (PD). I would like to use data that I extract from
audio files to affect 3-d game simulations in Blender.  I don't know
specifically what it is I would be manipulating -- this is an artistic
project, so intend to do a lot of experimenting to see what I come up
with...

My question(s): Is this possible, reasonable, plausible?

Thanks

-Greg



From tuomas.vesterinen at pp.inet.fi  Wed Mar 21 12:27:43 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Wed, 21 Mar 2007 16:27:43 GMT
Subject: Exceptions and unicode messages
In-Reply-To: <fi8Mh.84$Ub6.17@read3.inet.fi>
References: <fi8Mh.84$Ub6.17@read3.inet.fi>
Message-ID: <32dMh.197$Ub6.122@read3.inet.fi>


This seems to work:

 >>> import sys, traceback
 >>> def excepthook(exctype, value, tb):
...     if tb:
...         lines = traceback.format_tb(tb)
...         for i, line in zip(range(len(lines)), lines):
...             lines[i] = lines[i].decode('utf8')
...         lines.insert(0, u'Traceback (most recent call last):\n')
...     else:
...         lines = []
...     msg = str(exctype).split('.')[-1] + u': ' + unicode(value)
...     lines.append(msg)
...     print u''.join(lines)
...
 >>> sys.excepthook = excepthook
 >>> class UserError(StandardError):
...     def __str__(self):
...         return self.args[0]
...
 >>> raise UserError(u'V??r? tyyppi')
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
UserError: V??r? tyyppi
 >>>

Tuomas

Tuomas wrote:
> This works:
>  >>> raise StandardError(u'Wrong type')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> StandardError: Wrong type
> 
> but don't in Finnish:
>  >>> raise StandardError(u'V??r? tyyppi')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> StandardError>>>
>  >>>
> 
> Any solution in Python?
> 
> TV


From tjreedy at udel.edu  Sun Mar 11 12:13:36 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 Mar 2007 12:13:36 -0400
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
Message-ID: <et19rd$tmb$1@sea.gmane.org>


"Dan Bishop" <danb_83 at yahoo.com> wrote in message 
news:1173629090.993914.55570 at 30g2000cwc.googlegroups.com...
| On Mar 11, 9:31 am, "Mark Dickinson" <dicki... at gmail.com> wrote:
| > I get the following behaviour on Python 2.5 (OS X 10.4.8 on PowerPC,
| > in case it's relevant.)
| >
| > >>> x, y = 0.0, -0.0
| > >>> x, y
| > (0.0, 0.0)
| > >>> x, y = -0.0, 0.0
| > >>> x, y
| >
| > (-0.0, -0.0)
|| IIRC, float.__repr__ just does whatever libc does.  Have you tried
| using printf("%g, %g", 0.0, -0.0) in a C program?

Detailed FP behavior like this is system (and yes, libc) dependent.  On 
WinXP
IDLE 1.1.3
>>> x,y = 0.0, -0.0
>>> x,y
(0.0, 0.0)
>>> x,y = -0.0, 0.0
>>> x,y
(0.0, 0.0)
>>> -0.0
0.0

Terry Jan Reedy





From paul at boddie.org.uk  Fri Mar 30 06:13:08 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 30 Mar 2007 03:13:08 -0700
Subject: Cheeseshop needs mirrors
In-Reply-To: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>
References: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>
Message-ID: <1175249588.897793.24450@o5g2000hsb.googlegroups.com>

On 30 Mar, 09:05, "Jon" <chai... at gmail.com> wrote:
>
> If something as widely used as eggs is going to have a single point of
> failure like the Cheeseshop, we can't have it going down.
>
> I'm sure there are other solutions, but my suggestion is simply to
> have mirrors. It works for Debian, after all.

It was said that the setuptools stuff could work with simple package
index sites using static Web pages, and these could be mirrors of the
main package index, but I suppose it's time once again to remind
anyone wanting to reinvent package/dependency-management tools to take
another look at what's already been done in the domain. As you say, it
works for Debian.

Paul



From israphelr at googlemail.com  Fri Mar  9 16:50:47 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 9 Mar 2007 13:50:47 -0800
Subject: Need help with a string plz! (newbie)
In-Reply-To: <12v3ksihos7uj7a@corp.supernews.com>
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<12v3ksihos7uj7a@corp.supernews.com>
Message-ID: <1173477047.467568.298090@p10g2000cwp.googlegroups.com>

On Mar 9, 9:37 pm, Grant Edwards <gra... at visi.com> wrote:
> On 2007-03-09, israph... at googlemail.com <israph... at googlemail.com> wrote:
>
> > I thought maybe I could create another variable and then assign each
> > character into the new string by concatenating, makign a new string
> > each time, but I find this a bit muddling at the moment. Any help'd be
> > great. Thanks.
>
> s = ''
> for c in word:
>     s = c + s
> print s
>


Okay thanks very much, I used this method, since it's cloest one to I
am already faimilar with.

Here's the final code..(if anyones interested)

######################################################

print "\nWelcome !"
print "\nEnter a word, and the world will be reversed!"

word = raw_input("\nPlease Enter a word: ")

end = len(word)
end -= 1
new_string = ""

for position in range(end, -1, -1):
   new_string += word[position]

print new_string

raw_input("\nPress Enter to Exit")

#######################################



From michal.zaborowski at _nospam_wp.pl  Thu Mar 15 19:11:09 2007
From: michal.zaborowski at _nospam_wp.pl (=?ISO-8859-2?Q?Micha=B3_Zaborowski?=)
Date: Fri, 16 Mar 2007 00:11:09 +0100
Subject: Python COM called from VB/Delphi
In-Reply-To: <3KidnaXVSJHiDWXYnZ2dnUVZ_vGinZ2d@comcast.com>
References: <3KidnaXVSJHiDWXYnZ2dnUVZ_vGinZ2d@comcast.com>
Message-ID: <etcjhr$6v5$1@inews.gazeta.pl>

Hi,

Larry Bates wrote:
> I have a rather large Python class that I've converted to
> a COM object.  I can dispatch (using either Python or VB)
> and call the methods perfectly.  Now a new client wants
> to call it from Delphi.  Can anyone out there give me
> any pointers on how that would be done.  Are there any
> "gotchas" about the way arguments or return values
> would need to be different for Delphi.  I have NO Delphi
> experience so I'm completely lost.
> 
   There are components - Python for Delphi.
You can call Python functions / methods from Delphi.
Also - it is possible to create Python class with
underlying Delphi code.

> Secondly, I need a callback function in VB (progress
> meter) that I can pass to Python COM object to show
> progress of https: uploads.  I've tried a bunch of
> different things, but am getting nowhere.  Anybody
> know how to accomplish this?  I need a class that
> has start(), progress(total, count), complete()
> methods that is called from my Python COM object.
> I got one working in Python by using win32's
> win32com.server.util.wrap/unwrap functions but
> the VB one has got me stumped.
> 
   Sorry - my experience with VB is rather poor.

-- 
Regards,
   Michal Zaborowski (TeXXaS)


From DustanGroups at gmail.com  Sat Mar 24 07:59:47 2007
From: DustanGroups at gmail.com (Dustan)
Date: 24 Mar 2007 04:59:47 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <1174678166.970277@jubilee.claranet.pt>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
Message-ID: <1174737587.638835.137070@y80g2000hsf.googlegroups.com>

On Mar 23, 1:30 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Mike Kent escreveu:
> ...
>
> > New way:
> > l=['a','b','c']
> > jl=','.join(l)
>
> I thank you all.
>
> Almost there ...
> I tried "".join(l,',') but no success ... :-(
>
> Paulo

Perhaps you're doing it wrong, despite having an example right in
front of you?

Side by side comparison:
jl=string.join(l,',')
jl=','.join(l)

The sequence is passed as an argument to the join method, and the
delimiter is the string whose method is being called.



From saikia at gmail.com  Wed Mar 14 03:56:20 2007
From: saikia at gmail.com (Amitabh Saikia)
Date: Wed, 14 Mar 2007 13:26:20 +0530
Subject: Swig Problem string&
Message-ID: <12094f90703140056x62d8bf88m7ce3031d7e8c5eae@mail.gmail.com>

Hi

  I have created a simple function called  'addTheString(string& str,
string appstr)' and the intension
  is to append the 'appstr' to 'str' and use 'str'.

  I tried swigging this method. My swigtest.i file is okay as I think
I have added both
     - stl.i at top
     - std_string.i

   However, I am running into the problem. I get error messages as follows

   -- error --
  TypeError: argument number 1: a 'std::string&' is expected,
   -- end error --

  I tried the mailing list solution posted by Mr. Chiang, but its not
helping me.
  Could you please help me out.

Thanks
- amitabh


From graemeglass at gmail.com  Wed Mar 28 08:22:06 2007
From: graemeglass at gmail.com (Graeme Glass)
Date: 28 Mar 2007 05:22:06 -0700
Subject: Auto execute python in USB flash disk
In-Reply-To: <-bOdnSzyH4JAFJTbnZ2dnUVZ_sWdnZ2d@comcast.com>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
	<-bOdnSzyH4JAFJTbnZ2dnUVZ_sWdnZ2d@comcast.com>
Message-ID: <1175084526.645236.314280@l77g2000hsb.googlegroups.com>

Or take a look at http://www.truecrypt.org/ (Unless like Brain said,
you are doing this to learn)

On Mar 27, 11:17 pm, Larry Bates <lba... at websafe.com> wrote:
> Brian Erhard wrote:
> > I am still fairly new to python and wanted to attempt a home made
> > password protection program.  There are files that I carry on a USB
> > flash drive that I would like to password protect.  Essentially, I
> > would like to password protect an entire directory of files.  Is there
> > a way to auto execute a python script after a user double clicks to
> > open a folder on the USB drive? How can you capture that double click
> > event on a specific folder?
>
> > Thanks.
>
> Unless you are just doing this to learn, I would suggest you purchase
> USB key with encryption included.  They are REALLY cheap.
>
> http://www.kingston.com/flash/DataTravelers_enterprise.asp
>
> -Larry




From half.italian at gmail.com  Wed Mar 14 20:35:48 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 14 Mar 2007 17:35:48 -0700
Subject: Circular Class Logic
Message-ID: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>

I have a set of classes that describe Files, Folders, etc., that I use
often in my scripts for moving files around, getting a files
extension, converting paths, changing permissions, etc  It's very
similar to Jason Orendorff's 'Path' library, and is very useful to
me.  The base class 'Data.py' stores all the basic attributes of any
piece of data on disk, and it is then subclassed to represent files
and folders with the attributes specific to that type of object.

I recently made a new class 'Disk.py' that is a subclass of
'Folder.py', to describe all of the attributes of any local or network
disks attached to the computer.  I subclassed it from Folder, because
it really is a folder, it's just at the root of a drive.  I'm
realizing that these 'Disk' objects are pretty useful, and I came up
with the idea to put a 'Disks' instance as a shared class variable
(singleton?) within the base class ('Data')  The idea being that any
instance of a File, or Folder object would contain the list of Disk
objects attached to the system, and could use them accordingly.  Also
important is that I would only need to gather the disk info once for
any given running application and all the instances could use it
(origianlly I was getting the disk info for each File/Folder object)

After an hour of banging my head from getting "AttributeError:
'module' object has no attribute 'Disks'" errors, I finally realized
that I'm trying to include an instance in the base class that is a
subclass of itself.  Short of making 'Disk' no longer a subclass of
Folder, is there any other way to include a subclassed instance in the
base class of that object? (this is very hard to put in to words)

~Sean



From ianare at gmail.com  Sun Mar 25 18:36:26 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: 25 Mar 2007 15:36:26 -0700
Subject: call to function by text variable
Message-ID: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>

yeah the subject doesn't really make sense does it?

anyway want I want to do is this:
if n == 1:

    self.operations.insert(pos, operations.Replace.Panel(self, main))

elif n == 2:

    self.operations.insert(pos, operations.ChangeCase.Panel(self,
main))

elif n == 3:

    self.operations.insert(pos, operations.Move.Panel(self, main))

As you can see all the different functions have the same variables, so
it would be easier if I could just make a list and use that.

like this:


list = ["Replace", "ChangeCase", "Move"]
textVariable = list[n]
self.operations.insert(pos, operations.[textVariable].Panel(self,
main))

Is something sort of like that possible?


TIA



From ptmcg at austin.rr.com  Thu Mar 15 15:25:33 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 15 Mar 2007 12:25:33 -0700
Subject: Circular Class Logic
In-Reply-To: <1173984908.706651.50260@y80g2000hsf.googlegroups.com>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
	<1173962904.306751.86160@n76g2000hsh.googlegroups.com>
	<1173984908.706651.50260@y80g2000hsf.googlegroups.com>
Message-ID: <1173986733.127500.250250@b75g2000hsg.googlegroups.com>

On Mar 15, 1:55 pm, half.ital... at gmail.com wrote:
> > class Disk(Folder):
> >     def __init__(self,driveLetter):
> >         super(Disk,self).__init__(driveLetter+":/")
>
> What is going on there?  Is it just explicitly calling the super's
> init function?

What is going on is that Disk is being initialized with a single
character, such as 'D', and then calling the superclass with 'D:/',
the root folder on D.  You're the one who said that Disk was a
subclass of Folder (sorry, you called it "Data"), so I tried to come
up with an example in which this made some kind of sense.

> How is that really different from this:
>
> class Disk(Folder):
>   def __init__(self,driveLetter):
>     Folder.Folder.__init__(self.path) # ???  Being that Folder is the
> superclass?
>
Where did self.path come from?  Even though Folder is the superclass,
self.path doesn't exist until the Folder.__init__ method gets called.
This ain't C++ you know.  And as I said above, we are taking a single
character drive letter, and calling the superclass init with the root
directory of that drive, so these are .

> I'd like to be able to use the shared Disk objects in any class that
> is a subclass of Data.  Will the above method still make the Disk
> objects available in File.py?  Also, what if the classes are in
> different modules.
>
> I'll try to experiment with it this afternoon.  I'm using more
> information than just the drive letter.  What if the user wants to
> find out the unc path to the share given the drive letter, or copy a
> file to the local disk that is not a system disk that has the most
> available space on it, or wants to mount or unmount a network drive.
>
Knock yourself out.  I just hacked together these Folder/Disk classes
by way of a half-baked-but-working example.  My point is that to
initialize a class level variable on class Foo, all that is needed is
to assign it in the defining module, that is:

class Foo:
   pass

Foo.fooClassVar = "a class level variable"

Now any Foo or sub-Foo can access fooClassVar.  The type of
fooClassVar can be anything you want, whether it is a Foo, subclass of
Foo or whatever, as long as it has been defined by the time you assign
fooClassVar.

-- Paul



From knipknap at gmail.com  Wed Mar 14 16:52:34 2007
From: knipknap at gmail.com (Samuel)
Date: 14 Mar 2007 13:52:34 -0700
Subject: Converting a list to a dictionary
In-Reply-To: <1173905329.280910.24450@l75g2000hse.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
	<45f8583d$0$10407$426a34cc@news.free.fr>
	<1173904326.037621.10390@n76g2000hsh.googlegroups.com>
	<1173905016.752156.248140@n59g2000hsh.googlegroups.com>
	<1173905329.280910.24450@l75g2000hse.googlegroups.com>
Message-ID: <1173905554.026457.34810@l75g2000hse.googlegroups.com>

On Mar 14, 9:48 pm, "Drew" <olso... at gmail.com> wrote:
> This is interesting behavior, but may not be what the original poster
> intended.

I am the original poster :).

> If I understand correctly, this means that if more than one
> object shares the same id, only one copy will be created in the dict.
> Is this correct?

Yes. Dictionaries are just hashes; you can't have the same key twice.

Bye,
-Sam



From maxerickson at gmail.com  Sat Mar 24 14:24:15 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Sat, 24 Mar 2007 18:24:15 +0000 (UTC)
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<1174676818.207543.246080@l75g2000hse.googlegroups.com>
	<1174678166.970277@jubilee.claranet.pt>
	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<Xns98FD812654515duncanbooth@127.0.0.1>
	<1174758072.851763.80860@e1g2000hsg.googlegroups.com>
Message-ID: <Xns98FD9284FBBC4maxericksongmailcom@80.91.229.5>

"7stud" <bbxx789_05ss at yahoo.com> wrote:

> On Mar 24, 8:30 am, Duncan Booth <duncan.bo... at invalid.invalid>
> wrote: 
>> In case you are feeling that the ','.join(l) looks a bit
>> jarring, be aware that there are alternative ways to write it.
>> You can call the method on the class rather than the instance:
>>
>>    jl = str.join(',', l)
>>    jl = unicode.join(u'\u00d7', 'l')
>>
>>... the catch is you need to know
>> the type of the separator in advance.
> 
> When I try the latter example, I get an error:
> 
> lst = ["hello", "world"]
> print unicode.join(u"\u00d7", lst)
> 
> Traceback (most recent call last):
>   File "test1.py", line 2, in ?
>     print unicode.join(u"\u00d7", lst)
> UnicodeEncodeError: 'ascii' codec can't encode character u'\xd7'
> in position 5: ordinal not in range(128)
> 

Your terminal is likely the problem. Get rid of the print:

q=unicode.join(u'\u00d7',['hello','world'])

and you will probably get rid of the exception.

(so I guess the issue is the display, not the logic)


max



From Nomad.C at gmail.com  Mon Mar 26 10:13:44 2007
From: Nomad.C at gmail.com (Nomad.C at gmail.com)
Date: 26 Mar 2007 07:13:44 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
Message-ID: <1174918424.125068.176920@y80g2000hsf.googlegroups.com>

On 26 Mar, 15:06, stef <s.mien... at id.umcn.nl> wrote:
> >> You can get the speed of fortran in Python by using libraries like
> >> Numeric without losing the readability of Python.
>
> > Can you back this up with some source??
> > Chris
>
> Is this really the most important issue in your choice ?
>
> As said by others, "Portability, scalability & RAD" as an advantage of
> Python are probably far more important.
>
> And on the other hand Python is perfect as glue between Fortran and
> whatsoever.
> To emphasize that, I expect the number of lines in Python is at least 3
> times less than in Fortran.
>
> I did some comparison between MatLab and Python  (Scipy) for real-time
> analysis,
> and for all my cases Pyhton van 3 .. 7 times faster than MatLab.
>
> So I'ld suggest to start with downloading the Enthought edition of Python,
> and you can judge for yourself within 10 minutes,
> if it's fast enough.
>
> cheers,
> Stef Mientki

Is there a mac version??
Thanks
Chris



From openopt at ukr.net  Thu Mar 15 14:45:39 2007
From: openopt at ukr.net (dmitrey)
Date: 15 Mar 2007 11:45:39 -0700
Subject: right-format of integer output as text
Message-ID: <1173984339.188538.200880@l75g2000hse.googlegroups.com>

hi all,
I need printing the following:

     1
     2
     3
...
     9
   10
...
   99
 100
...
  999
1000
1001
...
how can I implement this one in the simpliest way?
Thank you in advance,
D.



From deets at nospam.web.de  Mon Mar 12 08:23:37 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 12 Mar 2007 13:23:37 +0100
Subject: Single string print statements on multiple lines.
References: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
Message-ID: <55kv29F24oq26U1@mid.uni-berlin.de>

HeEm wrote:

> In my 100 level CS course, I was asked to create multiple lines of
> output within a single string.  Of course I know how to:
> 
> print "I am"
> print "a python"
> print "newbie."
> 
> How can I get this accomplished using a single string (assuming this
> means a one line statement).  Is there and escape character or
> something that could be added?
> 
> Thanks for any help that can be provided.

The usual one: \ 

Do

"first line\nnextline"

Diez


From manstey at csu.edu.au  Wed Mar 14 02:20:39 2007
From: manstey at csu.edu.au (manstey)
Date: 13 Mar 2007 23:20:39 -0700
Subject: how to detect change of list of instances
In-Reply-To: <pan.2007.03.14.02.11.49.934449@REMOVEME.cybersource.com.au>
References: <1173835404.477078.306410@b75g2000hsg.googlegroups.com>
	<pan.2007.03.14.02.11.49.934449@REMOVEME.cybersource.com.au>
Message-ID: <1173853239.022266.327110@d57g2000hsg.googlegroups.com>

Thanks.

All I want to know is whether the newlist, as a list of instances, is
modified. I thought equality was the way to go, but is there a simpler
way? How can I monitor the state of newlist and set a flag if it is
changed in anyway?




From pecora at anvil.nrl.navy.mil  Fri Mar  9 09:30:46 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 Mar 2007 09:30:46 -0500
Subject: Is this right? Multiple imports of same module.
Message-ID: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>

>From what I gleaned on some messages this is the way multiple imports of 
the same module work.  Say, I have 3 modules (mod1.py, mod2.py, and 
mod3.py) and in the same session they all import another module 
mymodule.py like this:

*In mod1.py

import mymodule

*In mod2.py

import mymodule

*In mod3.py

import mymodule as MM

Then mymodule is imported only once, but each module has access to it 
through the module name (mod1 and mod2) and the alias MM (mod3).  Is 
that right?

I was concerned about multiple imports and efficiency.

Thanks for any info.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From flgoms at hotmail.com  Mon Mar 12 10:53:41 2007
From: flgoms at hotmail.com (Fabio Gomes)
Date: Mon, 12 Mar 2007 17:53:41 +0300
Subject: backslashes in lists
Message-ID: <BAY126-W1035B549162BA0DFB02563D37D0@phx.gbl>


Hi list,  I'm trying to use a string with backslashes in a list. But Python parses strings in lists with repr().>>> alist = ['a', 'b', 'c:\some\path']>>> alist['a', 'b', 'c:\\some\\path']>>> print alist['a', 'b', 'c:\\some\\path']  I already tried str() and raw (r) but it didn't work. All I want is to keep a single backslash in the string since it is a path information.  Can anyone help me, please?  Thank you.
_________________________________________________________________
O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na Web e sua rede amigos.
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From Ingo.Wolf at gmx.de  Tue Mar  6 10:18:06 2007
From: Ingo.Wolf at gmx.de (iwl)
Date: 6 Mar 2007 07:18:06 -0800
Subject: askstring Window to the top under Windows
In-Reply-To: <1173188906.327302.291650@s48g2000cws.googlegroups.com>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<1173188906.327302.291650@s48g2000cws.googlegroups.com>
Message-ID: <1173194286.807112.180370@c51g2000cwc.googlegroups.com>

On 6 Mrz., 14:48, "Tim Golden" <tjgol... at gmail.com> wrote:
> On Mar 6, 1:13 pm, "iwl" <Ingo.W... at gmx.de> wrote:
>
> It's not clear whether you're talking about the usual
> "Why do I get a DOS window when I run my python script?"
> question -- to which the answer is, in essence, change
> your script's extension to .pyw or use the pythonw.exe
> executable -- or "Why _when I use askstring_ do I get
> an empty window?". If it's the latter, then I don't
> know, but can you provide a small example script which
> exhibits the behaviour.
>
> TJG

>>> import tkSimpleDialog
>>> tkSimpleDialog.askstring("a","b")

at the python Console under XP (not pythonw).

-> instead of only showing the Inputwindow at the top,
some additional empty window is shown, both not on top.



From aleax at mac.com  Fri Mar  2 22:25:12 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 2 Mar 2007 19:25:12 -0800
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
Message-ID: <1hud3xf.1qejsuiozzrxrN%aleax@mac.com>

Thomas Dybdahl Ahle <lobais at gmail.com> wrote:

> I have a sort function in a python chess program.
> Currently it looks like this:
> 
> def sortMoves (board, table, ply, moves):
>     f = lambda move: getMoveValue (board, table, ply, move)
>     moves.sort(key=f, reverse=True)
>     return moves
> 
> However I'd really like not to use the lambda, as it slows down the code.
> 
> I've thought about saving the extra variables in the global space, but it
> really feals ugly.
> 
> Do you have any ideas how I can sort these moves the fastest?

Maybe

  moves.sort(key=functool.partial(board, table, ply), reverse=True)

might be a bit faster?  Not sure, but maybe worth trying.

If not, a bit faster (nothing major) might be

  def f(move, board=board, table=table, ply=ply):
      return getMoveValue(board, table, ply, move)

the small advantage here would be to use the lexically scoped variable
lookup just once (at nested-def time) with the three names being then
looked up as locals in the len(moves) call to f...


Alex


From acb at uchicago.edu  Sat Mar 31 18:02:19 2007
From: acb at uchicago.edu (Aaron Brady)
Date: Sat, 31 Mar 2007 17:02:19 -0500
Subject: shelf membership
Message-ID: <Pine.GSO.4.62.0703311624460.24926@harper.uchicago.edu>

can you shelve objects with membership?

this gives you:

TypeError: object does not support item assignment
dict 0 True
Exception exceptions.TypeError: 'object does not support item assignment' 
in  ignored

> ignored is a bit mysterious.  tx in advance.

from shelve import *
class MyShelf(DbfilenameShelf):
  	def __init__(self, filename, flag='c', protocol=None, 
writeback=False, binary=None):
  		self.__dict__['ready']=False
  		DbfilenameShelf.__init__(self, filename, flag, protocol, 
writeback, binary)
  		self.ready=True
  	def __setattr__(self,name,value):
  		if not self.ready:
  			self.__dict__[name]=value
  		else:
  			print name, value, self.ready
  			self.__dict__[name]=value
  			DbfilenameShelf.__setitem__(self,name,value)

def open(filename, flag='c', protocol=None, writeback=False, binary=None):
      return MyShelf(filename, flag, protocol, writeback, binary)



From steve at REMOVEME.cybersource.com.au  Thu Mar  8 03:37:48 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 08 Mar 2007 19:37:48 +1100
Subject: Howto find dict members from a list of keys
References: <esogs0$41a$1@online.de>
	<mailman.4790.1173342408.32031.python-list@python.org>
Message-ID: <pan.2007.03.08.08.37.48.318909@REMOVEME.cybersource.com.au>

On Thu, 08 Mar 2007 05:26:22 -0300, Gabriel Genellina wrote:

> En Thu, 08 Mar 2007 05:20:20 -0300, Alexander Eisenhuth  
> <newsuser at stacom-software.de> escribi?:
> 
>> what algo do you use, when you want to find the dict values from d, with  
>> members
>> of l. Following example:
>>
>>  >>> d = {1:2,2:3,3:4,4:5,5:6,6:7,7:8,8:9,9:10}
>>  >>> l = [7,8]
>>  >>> found_dic_members = <yourCode>
>>  >>> print found_dict_members
>> [8,9]
> 
> found_dic_members = [d[key] for key in l]

*self stares at the line of code*

*self thinks about what he just posted*

*self realises with acute embarrassment that he's jumped to conclusions
and completely misunderstood the Original Poster's question*

Oops! I'll just be slinking away now... 



-- 
Steven D'Aprano 



From kyosohma at gmail.com  Wed Mar 21 09:27:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 21 Mar 2007 06:27:48 -0700
Subject: Exceptions and unicode messages
In-Reply-To: <fi8Mh.84$Ub6.17@read3.inet.fi>
References: <fi8Mh.84$Ub6.17@read3.inet.fi>
Message-ID: <1174483668.389953.198640@n76g2000hsh.googlegroups.com>

On Mar 21, 6:03 am, Tuomas <tuomas.vesteri... at pp.inet.fi> wrote:
> This works:
>  >>> raise StandardError(u'Wrong type')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> StandardError: Wrong type
>
> but don't in Finnish:
>  >>> raise StandardError(u'V??r? tyyppi')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> StandardError>>>
>  >>>
>
> Any solution in Python?
>
> TV

You may even need to change you computer's default character set to
make this work. This guy did it for one of his programs:
http://aroberge.blogspot.com/2007/01/unicode-headaches-and-solution.html

Mike



From python at rcn.com  Wed Mar 14 04:44:03 2007
From: python at rcn.com (Raymond Hettinger)
Date: 14 Mar 2007 01:44:03 -0700
Subject: number generator
In-Reply-To: <1173515984.515050.27400@n33g2000cwc.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
Message-ID: <1173861843.878008.83090@p15g2000hsd.googlegroups.com>

> To make the solutions equi-probable, a simple approach is to
> recursively enumerate all possibilities and then choose one of them
> with random.choice().

Since people are posting their solutions now (originally only hints
were provided for the homework problem), here's mine:

def genpool(n, m):
    if n == 1:
        yield [m]
    else:
        for i in xrange(1, m):
            for rest in genpool(n-1, m-i):
                yield rest + [i]

import random
print random.choice(list(genpool(n=4, m=20)))



From duncan.booth at invalid.invalid  Sat Mar 31 11:44:34 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 31 Mar 2007 15:44:34 GMT
Subject: Sorting a multidimensional array by multiple keys
References: <pan.2007.03.31.12.43.14@no.spam.plz>
	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
	<pan.2007.03.31.13.42.19@no.spam.plz>
	<pan.2007.03.31.13.45.32@no.spam.plz>
Message-ID: <Xns9904AA252EC47duncanbooth@127.0.0.1>

Rehceb Rotkiv <rehceb at no.spam.plz> wrote:

> Wait, I made a mistake. The correct result would be
> 
> reaction is BUT by the
> pattern , BUT it is
> rapid , BUT it is
> sea , BUT it is
> sodium , BUT it is
> this manner BUT the dissolved
> 
> because "by the" comes before and "the dissolved" after "it is". Sorry 
> for the confusion.

>>> data = [
	"reaction is BUT by the",
	"sodium , BUT it is",
	"sea , BUT it is",
	"this manner BUT the dissolved",
	"pattern , BUT it is",
	"rapid , BUT it is",
	]
>>> data = [ s.split() for s in data]
>>> from pprint import pprint
>>> pprint(data)
[['reaction', 'is', 'BUT', 'by', 'the'],
 ['sodium', ',', 'BUT', 'it', 'is'],
 ['sea', ',', 'BUT', 'it', 'is'],
 ['this', 'manner', 'BUT', 'the', 'dissolved'],
 ['pattern', ',', 'BUT', 'it', 'is'],
 ['rapid', ',', 'BUT', 'it', 'is']]
>>> from operator import itemgetter
>>> data.sort(key=itemgetter(0))
>>> data.sort(key=itemgetter(1))
>>> data.sort(key=itemgetter(4))
>>> data.sort(key=itemgetter(3))
>>> pprint(data)
[['reaction', 'is', 'BUT', 'by', 'the'],
 ['pattern', ',', 'BUT', 'it', 'is'],
 ['rapid', ',', 'BUT', 'it', 'is'],
 ['sea', ',', 'BUT', 'it', 'is'],
 ['sodium', ',', 'BUT', 'it', 'is'],
 ['this', 'manner', 'BUT', 'the', 'dissolved']]


From psdasilvaX at esotericaX.ptX  Tue Mar 20 13:09:47 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Tue, 20 Mar 2007 17:09:47 +0000
Subject: an enumerate question
In-Reply-To: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
Message-ID: <1174410590.135667@jubilee.claranet.pt>

eight02645999 at yahoo.com escreveu:
> hi
> say i want to enumerate lines of a file
> eg
> for n,l in enumerate(open("file")):
>      # print  next line ie
> 
> is there a way to print out the next line from current line using the
> above?.
> Or do i have to do a readlines() first to get it into a list eg
> d = open("file").readlines()
> for n, l in enumerate(d):
>     print d[n+1]
> 
> thanks
> 
for n,l in enumerate(file("file")):
	print n,l[:-1] # the :-1 is to drop the \n - print n,l, also works (end
with ',').
HTH
Paulo



From gigs at hi.t-com.hr  Thu Mar  1 13:34:42 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 01 Mar 2007 19:34:42 +0100
Subject: Tkinter menus
Message-ID: <es76c6$5bo$1@ss408.t-com.hr>

class MenuDemo(Frame):
     def __init__(self, parent=None):
         Frame.__init__(self, parent)
         self.pack(expand=YES, fill=BOTH)
         self.createWidgets()

     def createWidgets(self):
         self.makeMenuBar()
         self.makeToolBar()
         L = Label(self, text='Menu and Toolbar demo')
         L.config(relief=SUNKEN, width=40, height=10, bg='white')
         L.pack(expand=YES, fill=BOTH)

     def makeMenuBar(self):
         self.menubar = Menu(self.master)        #here
         self.master.config(menu=self.menubar)   #here
         self.fileMenu()
         self.editMenu()
         self.imageMenu()

why i need to use self.master?
why i cant just use self?

thx


From b.r.willems at gmail.com  Sun Mar 11 15:12:04 2007
From: b.r.willems at gmail.com (Bart Willems)
Date: Sun, 11 Mar 2007 15:12:04 -0400
Subject: any better code to initalize a list of lists?
In-Reply-To: <LkYIh.2513$Qw.314@newssvr29.news.prodigy.net>
References: <esqc9r$cn09$1@netnews.upenn.edu>
	<LkYIh.2513$Qw.314@newssvr29.news.prodigy.net>
Message-ID: <%qYIh.532$nd1.445@newsfe12.lga>

Donald Fredkin wrote:
> John wrote:
> 
>> For my code of radix sort, I need to initialize 256 buckets. My code
>> looks a little clumsy:
>>
>> radix=[[]]
>> for i in range(255):
>>    radix.append([])
>>
>> any better code to initalize this list?
> 
> radix = [[[]]*256][0]
> 

No I fell for that one too - it's the same as 'radix = [[]] * 256. Try 
radix[0].append('dead parrot')..


From bhudspeth at edac.unm.edu  Thu Mar 15 15:04:40 2007
From: bhudspeth at edac.unm.edu (William Hudspeth)
Date: Thu, 15 Mar 2007 13:04:40 -0600
Subject: Using wildcards with Popen in the Subprocess module
Message-ID: <1173985480.4612.26.camel@localhost>

Hello, 

I am needing to pass an argument to the Popen function of the Subprocess
module that includes a wildcard in the filename. It seems that Popen is
not able to expand wildcards, and treats a filename that includes a
wildcard as a literal.

EX.

var1="/path_to_files/filnames*.doc"
result=Popen(["command",var1]).wait()

Can anyone tell me how I can work around this problem?


Thanks, Bill



From anton.vredegoor at gmail.com  Sat Mar 10 22:55:33 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sun, 11 Mar 2007 04:55:33 +0100
Subject: number generator
In-Reply-To: <mailman.4926.1173583699.32031.python-list@python.org>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><7x7itqqxlh.fsf@ruckus.brouhaha.com><1173453432.893222.308610@j27g2000cwj.googlegroups.com><pan.2007.03.09.15.32.01.112493@gmx.net><1173515984.515050.27400@n33g2000cwc.googlegroups.com>	<esukru$1v1$1@news2.zwoll1.ov.home.nl><mailman.4919.1173560418.32031.python-list@python.org>	<esvepk$1cu$1@news3.zwoll1.ov.home.nl>
	<mailman.4926.1173583699.32031.python-list@python.org>
Message-ID: <esvuh1$fut$1@news3.zwoll1.ov.home.nl>

Terry Reedy wrote:

> "Anton Vredegoor" <anton.vredegoor at gmail.com> wrote in message 
> | Yes that was one of my first ideas too. But later on Steven pointed out
> | that one can view the problem like this:
> |
> | 00010000100010100
> |
> | That would be [3,4,3,1,2]
> |
> | where the '1' elements are like dividing shutters that partition the row
> | of '0'. This means that the problem is reduced to permutations (albeit
> 
> If any of the 1s appear at the ends or together, then you would have 0s in 
> the partition, which is not allowed, as I understood the spec.

Yes, I was writing about the bricks and bins problem from 4 years ago 
which is very similar.

> | unique permutations) which are a lot simpler to compute than partitions.
> 
> I think the simplicity is actually about the same.

Probably yes. It's like the difference between Pascal's triangle and the 
partition numbers' triangle. Anyway, Paul Rubin's idea in this same 
thread stimulated me to simplify my code a lot. It's rather late here so 
I hope I haven't slipped up again.

def comb(i,n,k):
     for j in range(k,0,-1):
         while noverk(n,j) > i :
              n -= 1
         i -= noverk(n,j)
         yield n

def noverk(n,k):
     return reduce(lambda a,b: a*(n-b)/(b+1),range(k),1)

def bb(i,bricks,bins):
     L = [j+1 for j in comb(i,bricks,bins-1)]
     return [(i-j) for i,j in zip([bricks]+L,L+[0])]

def test():
     bricks, bins = 6,4
     n = noverk(bricks-1,bins-1)
     for i in range(n):
         print bb(i,bricks,bins)

if __name__=='__main__':
     test()

A.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 20 08:01:36 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 20 Mar 2007 13:01:36 +0100
Subject: List to string
In-Reply-To: <pan.2007.03.20.03.41.19.501610@REMOVE.THIS.cybersource.com.au>
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
	<1174192714.014092.79380@l77g2000hsb.googlegroups.com>
	<45fe7ddc$0$25292$426a34cc@news.free.fr>
	<pan.2007.03.20.03.41.19.501610@REMOVE.THIS.cybersource.com.au>
Message-ID: <45ffcd12$0$18276$426a74cc@news.free.fr>

Steven D'Aprano a ?crit :
> On Mon, 19 Mar 2007 13:11:09 +0100, Bruno Desthuilliers wrote:
> 
>> There's no "cast" in Python. It would make no sens in a dynamically 
>> typed language, where type informations belong to the LHS of a binding, 
>> not the RHS.
> 
> Surely you have left and right mixed up?

(rereading)
(ashamed)
Obviously, yes.
Thanks for the correction.


From no at spam.it  Thu Mar  1 04:24:43 2007
From: no at spam.it (Pablo was Paolo)
Date: Thu, 01 Mar 2007 10:24:43 +0100
Subject: Reading csv files using SQL
In-Reply-To: <1172733220.231503.302520@8g2000cwh.googlegroups.com>
References: <45e5cda7$0$17940$4fafbaef@reader1.news.tin.it>
	<WItFh.7822$Jl.2517@newsread3.news.pas.earthlink.net>
	<45e6731d$0$4786$4fafbaef@reader4.news.tin.it>
	<1172733220.231503.302520@8g2000cwh.googlegroups.com>
Message-ID: <45e69bda$0$10625$4fafbaef@reader2.news.tin.it>

Paul McGuire ha scritto:
> Sqlite has an in-memory option, so that you can read in your csv, then
> load into actual tables.

Thanks, this could be the perfect solution.

Paolo


From aleax at mac.com  Sun Mar 18 13:40:25 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 10:40:25 -0700
Subject: list comprehension help
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<mailman.5248.1174235057.32031.python-list@python.org>
	<pan.2007.03.18.16.44.22.267421@gmx.net>
	<mailman.5250.1174236797.32031.python-list@python.org>
Message-ID: <1hv62q7.1r5ow4v1hzcpd7N%aleax@mac.com>

rkmr.em at gmail.com <rkmr.em at gmail.com> wrote:

> On 3/18/07, Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:
> > In <mailman.5248.1174235057.32031.python-list at python.org>, Daniel Nogradi
> > wrote:
> >
> > >> f = open('file.txt','r')
> > >> for line in f:
> > >>         db[line.split(' ')[0]] = line.split(' ')[-1]
> > >>         db.sync()
> > >
> > > What is db here? Looks like a dictionary but that doesn't have a sync
> > >method.
> >
> > Shelves (`shelve` module) have this API.  And syncing forces the changes
> > to be written to disks, so all caching and buffering of the operating
> > system is prevented.  So this may slow down the program considerably.
> 
> It is a handle for bsddb
> 
> import bsddb
> db=bsddb.hashopen('db_filename')
> Syncing will defenitely slow down. I will slow that down. But is there
> any improvement I can do to the other part the splitting and setting
> the key value/pair?

Unless each line is huge, how exactly you split it to get the first and
last blank-separated word is not going to matter much.

Still, you should at least avoid repeating the splitting twice, that's
pretty obviously sheer waste: so, change that loop body to:

    words = line.split(' ')
    db[words[0]] = words[-1]

If some lines are huge, splitting them entirely may be far more work
than you need.  In this case, you may do two partial splits instead, one
direct and one reverse:

    first_word = line.split(' ', 1)[0]
    last_word = line.rsplit(' ', 1][-1]
    db[first_word] = last_word

You could also try to extract the first and last words by re or direct
string manipulations, but I doubt that would buy you much, if any,
performance improvement in comparison to the partial-splits.  In the
end, only by "benchmarking" (measuring performance on sample data of
direct relevance to your application) can you find out.


Alex


From bignose+hates-spam at benfinney.id.au  Fri Mar  9 19:16:35 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 10 Mar 2007 11:16:35 +1100
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
Message-ID: <87lki6x89o.fsf@benfinney.id.au>

Lou Pecora <pecora at anvil.nrl.navy.mil> writes:

> ['import mymodule' in three separate modules]
>
> Then mymodule is imported only once, but each module has access to
> it through the module name (mod1 and mod2) and the alias MM (mod3).
> Is that right?

Not quite. The module is imported three times, and is assigned to
three different namespaces; but the code in the module is executed
only once, the first time it is imported. Each subsequent import skips
the "execute the code" step.

-- 
 \       "My classmates would copulate with anything that moved, but I |
  `\            never saw any reason to limit myself."  -- Emo Philips |
_o__)                                                                  |
Ben Finney



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar 30 08:05:12 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 30 Mar 2007 14:05:12 +0200
Subject: Indentation for code readability
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <574cniF2bn6u1U1@mid.individual.net>

DE wrote:

> The curly brackets have no functional meaning but increase the
> readability significantly. 

Personally, I don't think so. It quite explodes the code.

Yes, I also indent "BSD style" in my C++ programs.

Regards,


Bj?rn

-- 
BOFH excuse #175:

OS swapped to disk



From wuwei23 at gmail.com  Tue Mar 27 22:42:34 2007
From: wuwei23 at gmail.com (alex23)
Date: 27 Mar 2007 19:42:34 -0700
Subject: looking for RSS generator
In-Reply-To: <1175041816.363323.22460@n76g2000hsh.googlegroups.com>
References: <1175041816.363323.22460@n76g2000hsh.googlegroups.com>
Message-ID: <1175049754.792928.267820@r56g2000hsd.googlegroups.com>

> I'm looking for sample code to generate an RSS feed.

For this, I highly recommend PyRSS2Gen: http://www.dalkescientific.com/Python/PyRSS2Gen.html

Very straightforward.

> I can annotate
> my html code with comments/tags to mark the articles, all I need is an
> "engine" to process the pages and generate the rss file.

If you're wanting to convert HTML to RSS, I'd recommend using
BeautifulSoup for parsing the HTML: http://www.crummy.com/software/BeautifulSoup/

Hope this helps.

-alex23




From fredrik at pythonware.com  Fri Mar 23 09:32:03 2007
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 23 Mar 2007 14:32:03 +0100
Subject: Cleanly exiting multi thread application on SIGINT
References: <1174653622.239148.185270@y80g2000hsf.googlegroups.com>
Message-ID: <eu0ksj$agv$1@sea.gmane.org>

"jrpfinch" wrote:

> Is the following the most elegant way to exit a multi-threaded
> application on a Ctrl-C?  I am a complete beginner and would have
> thought there was some way of doing it without having to use while 1:
> pass, but have yet to find a way.

> def main:
>    wt = workerThread()
>    wt.setDaemon(True)
>    wt.start()
>    ct = counterThread()
>    ct.setDaemon(True)
>    ct.start()
>    try:
>        while 1:
>            pass

you could at least insert a time.sleep(1), to avoid busy-looping.

</F> 





From kyosohma at gmail.com  Tue Mar 27 09:53:23 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 06:53:23 -0700
Subject: enumerating processes
In-Reply-To: <mailman.5655.1174972544.32031.python-list@python.org>
References: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>
	<mailman.5655.1174972544.32031.python-list@python.org>
Message-ID: <1175003603.614456.265470@r56g2000hsd.googlegroups.com>

On Mar 27, 12:15 am, Shane Geiger <sgei... at ncee.net> wrote:
> I believe you are looking for os.getpid()
>
> ??? wrote:
> > hi ,all
> >    any one knows how to enumerate the current running processes , or
> > how to obtain a specific process by its name or process id. I know I
> > can do this in many  programming languages , but how in python? any
> > one know?
> >  Thanks for any guidance.
>
> > --
> > li xianmin
>
> >            lixian... at gmail.com <mailto:lixian... at gmail.com>
>
> --
> Shane Geiger
> IT Director
> National Council on Economic Education
> sgei... at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> Leading the Campaign for Economic and Financial Literacy
>
>  sgeiger.vcf
> 1KDownload

You can also use Golden's WMI to grab a list. As I understand it, the
WMI module relies on the win32 modules, but it's a nice wrapper. Check
out the cookbook at:

http://tgolden.sc.sabren.com/python/wmi_cookbook.html#running_processes

Mike



From harvey.thomas at informa.com  Wed Mar 28 06:22:26 2007
From: harvey.thomas at informa.com (harvey.thomas at informa.com)
Date: 28 Mar 2007 03:22:26 -0700
Subject: XML Parsing
In-Reply-To: <56us4mF2a9rq7U1@mid.uni-berlin.de>
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
	<56us4mF2a9rq7U1@mid.uni-berlin.de>
Message-ID: <1175077346.611452.164530@b75g2000hsg.googlegroups.com>

On Mar 28, 10:51 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> pyappl... at gmail.com wrote:
> > I want to parse this XML file:
>
> > <?xml version="1.0" ?>
>
> > <text>
>
> > <text:one>
> > <file>filename</file>
> > <contents>
> > Hello
> > </contents>
> > </text:one>
>
> > <text:two>
> > <file>filename2</file>
> > <contents>
> > Hello2
> > </contents>
> > </text:two>
>
> > </text>
>
> > This XML will be in a file called filecreate.xml
>
> > As you might have guessed, I want to create files from this XML file
> > contents, so how can I do this?
> > What modules should I use? What options do I have? Where can I find
> > tutorials? Will I be able to put
> > this on the internet (on a googlepages server)?
>
> > Thanks in advance to everyone who helps me.
> > And yes I have used Google but I am unsure what to use.
>
> The above file is not valid XML. It misses a xmlns:text namespace
> declaration. So you won't be able to parse it regardless of what parser you
> use.
>
> Diez- Hide quoted text -
>
> - Show quoted text -

The example is valid well-formed XML. It is permitted to use the ":"
character in element names. Whether one should in a non namespace
context is a different matter.

Harvey



From john.pye at gmail.com  Wed Mar 21 22:13:00 2007
From: john.pye at gmail.com (John Pye)
Date: 21 Mar 2007 19:13:00 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <yBjMh.18122$6.14978@tornado.fastwebnet.it>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
Message-ID: <1174529579.990955.116390@l77g2000hsb.googlegroups.com>

On Mar 22, 10:55 am, Giovanni Bajo <n... at ask.me> wrote:
> I suggest people to try my GCC 4.1.2 binary installer for Windows which fully
> integrates with Python and has scripts in place to solve the MSVCR71.DLL
> problem. It was announced on this very list a few days ago:
>
> http://www.develer.com/oss/GccWinBinaries

Hi Giovanni,

Thanks very much for that suggestion. It looks like you have done some
good work on addressing this problem.

I wonder if you might be able to expand on what those 'serious
problems' with GCC 4.x on the Windows platform are?

Also, can you comment on how one might use your compiler bundle with
MSYS? In particular, I like to run SCons from an MSYS prompt. Assuming
I don't want to kill my old MinGW and Cygwin installations, how do you
recommend that one proceeds to set up a working GCC 4 environment on
Windows? (I haven't downloaded it just yet; I'm on Linux today!)

Cheers
JP




From steve at REMOVE.THIS.cybersource.com.au  Tue Mar  6 08:44:10 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 07 Mar 2007 00:44:10 +1100
Subject: Is every number in a list in a range?
References: <mailman.4693.1173129006.32031.python-list@python.org>
Message-ID: <pan.2007.03.06.13.44.09.234034@REMOVE.THIS.cybersource.com.au>

On Mon, 05 Mar 2007 14:03:50 -0500, Steven W. Orr wrote:

> I have a list ll of intergers. I want to see if each number in ll is 
> within the range of 0..maxnum
> 
> I can write it but I was wondering if there's a better way to do it?

No, the way you wrote it is the absolute best way.

Or possibly the worst way.

It's kinda hard to tell since you don't tell us *how* you do it, so in the
spirit of "there are no stupid questions, only stupid answers" here's my
stupid solution to the problem.


def all_in_range(alist, n1, n2=None):
    """Returns True if all the items in alist of numbers
    are in the range n1 through n2 inclusive, using a
    silly, obfuscated algorithm.
    """
    if n2 is None:
        n1, n2 = 0, n1
    low, high = n1, n2
    all_in = True
    i = -1 - len(alist)
    if ((i + 1 + len(alist)) < len(alist)) is True:
        done = False
    else:
        done = True
    while not done is True:
        i = 1 + i
        x = alist[i + len(alist)]
        p = min(low, x) == low
        q = max(high, x) != high
        flag = ((not p and not q) or (p and q)) or (not p and q)
        all_in = all_in and not flag
        if (not (i + len(alist) + 2 > len(alist))) is True:
            done = False
        else:
            done = True
    if ((all_in is True) is False) is True:
        return False
    elif (not (all_in is False)) is True:
        return True


-- 
Steven.



From http  Fri Mar  2 00:53:09 2007
From: http (Paul Rubin)
Date: 01 Mar 2007 21:53:09 -0800
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<7xabywnugu.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>
Message-ID: <7xtzx4i43e.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> > That still sounds like an unreliable manual type system, 
> It's unreliable in the sense that the coder has to follow the naming
> convention, and must have some bare minimum of sense. If your coders are
> morons, no naming convention will save you. (For that matter, nothing will
> save you.)

Well, type systems in programming languages have generally proven more
reliable and easier to deal with than having programmers track it all
manually-- that's why we don't all write in Forth ;-).

> But dimensioned units are still only part of the story. Joel describes the
> situation the early Word developers found: when you're writing a word
> processor, you are doing a LOT of conversions between screen coordinates
> and window pane coordinates. Both have the same type (a pair of ints),
> both have the same dimensional units (length/pixels) but they are
> semantically different. If you place the character "N" at coordinates 0,0,
> it makes a big difference if the coordinates are relative to the current
> window or relative to the screen.

You're right that this is not exactly dimensional analysis, but it
still seems to call for types and conversion functions, rather than
naming conventions.  I guess they were writing that stuff in C++, so
I'd have expected the compiler to handle the conversions through casts
with no runtime cost except when an actual conversion was needed.  In
Haskell I believe it would be similar.


From bdesth.quelquechose at free.quelquepart.fr  Sun Mar  4 17:07:35 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 04 Mar 2007 23:07:35 +0100
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <45eb3b34$0$1404$426a74cc@news.free.fr>

Shawn Milo a ?crit :
(snip)
> The script reads a file from standard input and
> finds the best record for each unique ID (piid). The best is defined
> as follows: The newest expiration date (field 5) for the record with
> the state (field 1) which matches the desired state (field 6). If
> there is no record matching the desired state, then just take the
> newest expiration date.
> 

Here's a fixed (wrt/ test data) version with a somewhat better (and 
faster) algorithm using Decorate/Sort/Undecorate (aka schwarzian transform):

import sys
output = sys.stdout

input = [
     #ID  STATE ...  ...  ...  DATE TARGET
     "aaa\tAAA\t...\t...\t...\t20071212\tBBB\n",
     "aaa\tAAA\t...\t...\t...\t20070120\tAAA\n",
     "aaa\tAAA\t...\t...\t...\t20070101\tAAA\n",
     "aaa\tAAA\t...\t...\t...\t20071010\tBBB\n",
     "aaa\tAAA\t...\t...\t...\t20071111\tBBB\n",
     "ccc\tAAA\t...\t...\t...\t20071201\tBBB\n",
     "ccc\tAAA\t...\t...\t...\t20070101\tAAA\n",
     "ccc\tAAA\t...\t...\t...\t20071212\tBBB\n",
     "ccc\tAAA\t...\t...\t...\t20071212\tAAA\n",
     "bbb\tAAA\t...\t...\t...\t20070101\tBBB\n",
     "bbb\tAAA\t...\t...\t...\t20070101\tBBB\n",
     "bbb\tAAA\t...\t...\t...\t20071212\tBBB\n",
     "bbb\tAAA\t...\t...\t...\t20070612\tBBB\n",
     "bbb\tAAA\t...\t...\t...\t20071212\tBBB\n",
     ]

def find_best_match(input=input, output=output):
     PIID = 0
     STATE = 1
     EXP_DATE = 5
     DESIRED_STATE = 6

     recs = {}
     for line in input:
         line = line.rstrip('\n')
         row = line.split('\t')
         sort_key = (row[STATE] == row[DESIRED_STATE], row[EXP_DATE])
         recs.setdefault(row[PIID], []).append((sort_key, line))

     for decorated_lines in recs.itervalues():
         print >> output, sorted(decorated_lines, reverse=True)[0][1]

Lines are sorted first on  whether the state matches the desired state, 
then on the expiration date. Since it's a reverse sort, we first have 
lines that match (if any) sorted by date descending, then the lines that 
dont match sorted by date descending. So in both cases, the 'best match' 
is the first item in the list. Then we just have to get rid of the sort 
key, et voil? !-)

HTH


From lbates at websafe.com  Mon Mar  5 12:47:06 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 05 Mar 2007 11:47:06 -0600
Subject: Newbie question
In-Reply-To: <mailman.4684.1173113802.32031.python-list@python.org>
References: <mailman.4684.1173113802.32031.python-list@python.org>
Message-ID: <45EC579A.8090602@websafe.com>

Tommy Grav wrote:
> Hi list,
> 
>    this is somewhat of a newbie question that has irritated me for a while.
> I have a file test.txt:
> 
> 0.3434  0.5322 0.3345
> 1.3435  2.3345 5.3433
> 
> and this script
> lines = open("test.txt","r").readlines()
> for line in lines:
>    (xin,yin,zin) = line.split()
>    x = float(xin)
>    y = float(yin)
>    z = float(zin)
> 
> Is there a way to go from line.split() to x,y,z as floats without
> converting
> each variable individually?
> 
> Cheers
>    Tommy


Using a list comprehension you would write this as:

for line in lines:
    xin, yin, zin=[float(x) for x in line.split()]

This if course expects your data to be perfect.  If
you want error handling (e.g. less or more than 3 values,
values that cause exception when passed to float, etc.)
you will have to handle that differently.

-Larry


From lobais at gmail.com  Fri Mar 23 10:57:15 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Fri, 23 Mar 2007 15:57:15 +0100
Subject: Exception passing
References: <pan.2007.03.23.14.29.34@gmail.com>
	<1hvf3ru.1iqe09kju50weN%aleax@mac.com>
Message-ID: <pan.2007.03.23.14.57.32@gmail.com>

Den Fri, 23 Mar 2007 07:38:47 -0700 skrev Alex Martelli:

> Thomas Dybdahl Ahle <lobais at gmail.com> wrote:

>> This works quite good, but it is a hell to debug. Instead of getting a
>> log message to the line which originally raised the exception.

> As you see, the traceback is "maintained" when you just "raise", though
> it's altered when you "raise e".

Thanks a lot :D


From null at null.null  Fri Mar 30 03:46:56 2007
From: null at null.null (nullified)
Date: Fri, 30 Mar 2007 07:46:56 GMT
Subject: Any "consumer review generators" available?
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175225665.929475.183360@n59g2000hsh.googlegroups.com>
Message-ID: <0sfp03d9epf50d1o9jj22ni1al4o69ut9k@4ax.com>

On 29 Mar 2007 20:34:26 -0700, "Evil Otto" <zburnham at gmail.com> wrote:

>On Mar 29, 2:19 pm, aral... at aol.com wrote:
>> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan
>
>I really, really hope that you're looking to generate test data or
>filler text.
>
>If you're not, then DIAF.

Die In A Fire? Drop In A Fryer? Doug Is A Fucker? Drown In A Fart?


From aleax at mac.com  Tue Mar 20 12:05:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 09:05:44 -0700
Subject: Wanted:  a python24 package for Python 2.3
References: <45FFFEB6.2080403@pytex.org>
Message-ID: <1hv9nvz.1gpov9wh4av3fN%aleax@mac.com>

Jonathan Fine <jfine at pytex.org> wrote:
   ...
> In other words, I'm asking for a python24 package that
> contains all (or most) of the modules that are new to
> Python 2.4.

For subprocess specifically, see
<http://www.lysator.liu.se/~astrand/popen5/> .  I don't think anybody's
ever packaged up ALL the new stuff as you require.


Alex


From fd.calabrese at gmail.com  Wed Mar 14 07:48:23 2007
From: fd.calabrese at gmail.com (cesco)
Date: 14 Mar 2007 04:48:23 -0700
Subject: number generator
In-Reply-To: <1173861843.878008.83090@p15g2000hsd.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<1173861843.878008.83090@p15g2000hsd.googlegroups.com>
Message-ID: <1173872903.559978.195950@y66g2000hsf.googlegroups.com>

> Since people are posting their solutions now (originally only hints
> were provided for the homework problem), here's mine:

Well, I never really said it was a homework problem. Sure there are
more implications to my question that I had first imagined and I'm
really happy I could get so many insights but the question did
originate from a real problem I was facing in my research.

Thanks to everyone for the wonderful thread so far
Francesco



From xah at xahlee.org  Wed Mar 21 01:23:56 2007
From: xah at xahlee.org (Xah Lee)
Date: 20 Mar 2007 22:23:56 -0700
Subject: On Java's Interface (the meaning of interface in computer programing)
Message-ID: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>

On Java's Interface

Xah Lee, 20050223

In Java the language, there's this a keyword ?interface?.

In a functional language, a function can be specified by its name and
parameter specs. For example:
f(3)
f(3, [9,2])
f("some string")

are usage examples of 3 functions all having the same name, but having
different number and type of arguments. In this way, a function is
essentially known to outsiders by its name and parameter specs. The
gist in this concept is that the user don't need to know the
implementation details of the function. All she needs to know is the
function's name, and parameter specs and return value spec. (and of
course what the function is supposed to do.) In this way, interface
and implementation are separated. The implementation can change or
improve anytime, and users don't need to know.

In Java, the above concept of function name and parameter spec is
called a method's signature.

For another example, usually a program needs to talk to another
software such as a database software. The database software may have a
set of functions for the purpose of communicating to other software.
In essence, making the database useful to other software. Such a list
of function spec is often called API, which stands for Application
Programing Interface.

The API terminology is abused by the marketing-loving Sun Microsystems
by calling the Java language's documentation as ?The Java API?, even
though Java the language and its paraphernalia of libraries and
hardware-emulation system (all together jargonized as ?the Java
Platform?) isn't a Application nor Interface. (a API implies that
there are two disparate entities involved, which are allowed to
communicate thru it. In the case of ?The Java API?, it's one entity
talking to itself.).

In general, the interface concept in programing is a sort of
specification that allows different entities to call and make use of
the other, with the implication that the caller need not know what's
behind the facade.

In the Object Oriented Programing Paradigm, a new concept arose, that
is the ?interface? aspect of a class.

As we've seen, a function has parameter spec that is all there it is a
user needs to know for using it. In Java, this is the method's
?signature?. Now, as the methodology of the OOP experience multiplies,
it became apparent that the interface concept can be applied to
Classes as well. Specifically: the interface of a class is the class's
methods.

This concept is then turned into a OOP machinery, in hope of
extracting usefulness in software engineering. That is to say, now in
the Java language, a programer can actually write a piece of code,
whose sole purpose is to define what methods and variables a class
contains. This, is done with the keyword ?interface?. Once a interface
is defined, other classes can say which interfaces they implement, so
that if class C implement interface I, then programers don't need to
know the details about C. All they need to know is the interface I.
(which specifies all the methods, constructors, variables, a class
must have.)

(the Java's interface, is essentially the ?signature? of a class, in
Java's own jargon.)

A programer may ask, what's the big deal anyway? Since in Java,
classes are well documented anyway. What difference does it make to
know the documentation of C versus the documentation of interface for
C?

The thing about interface in Java is that the complexity grows. A Java
interface, can be inherited, just as classes. The idea is that
interfaces can also form a hierarchy just like classes.

In pure OOP such as Java, the object entities used to solve computing
problems are thought to form a relation as of a tree, thus we have the
class hierarchy. In a similar way, it is thought that interface, can
also form a hierarchy fruitfully. A good example is the list data
type. The explanation follows.

In computing languages, often there's a data concept variously known
as lists, aggregate, sequences, array, vector, tuple, set, matrix,
trees... The basic idea is that it is just a list of things. This list
may not allow repetitions, elements may be lists themselves, may have
certain dimension stipulations (e.g. matrix), may have certain
computational properties such as speed of retrieving a element or
adding a element or memory footprint... etc and so on. Different
requirement and different computational properties have given them
various names to go by. One can however organize them by the interface
perspective. In Java, they are known as Collection, and all have the
interface of Collection. (See http://java.sun.com/j2se/1.5.0/docs/api/java/util/Collection.html
http://java.sun.com/docs/books/tutorial/collections/interfaces/index.html
)

Consider a Set and List. One does not allow repetitions, while the
other allows. Other than that, both concepts are the same. They both
need methods like adding elements, deleting, inserting, sorting etc.
Therefore, from interface point of view, they share a parent. In Java,
both Set and List are interfaces, inherited from the parent interface
Collection.

So now, in Java, we have two hierarchies of separate category: Classes
and Interfaces. The Classes hierarchy is one single giant tree.
However, the interfaces are not all together as one tree. They are
more like forests, of many trees. It is important to remember that
interfaces and classes are separate entities. A class can implement a
interface. A interface can never inherit from a class.

In Java, it so happens that a class can implement more than one
interfaces. When a class C implements interfaces I1 and I2, C is
guaranteed to have all methods declared by interface I1 and I2. For
example, in Java, class Integer has interfaces Comparable and
Serializable. And the class ArrayList has these interfaces: Cloneable,
Collection, List, RandomAccess, Serializable.

The interface in Java, from a simple useful idea, has mutated into a
incomprehensible complexity.

In Java, Interface is no longer the sole thing a programer needs to
know about a class or function. It is no longer a concept that
separates a function's user spec from implementation detail.

For example, the ArrayList class has these interfaces: Cloneable,
Collection:List, RandomAccess, Serializable. As one can infer from the
names, they are more about what properties ArrayList has, than a
syntax facade that hides implementation irrelevances.

For example, see the Java documentation on these interfaces: ?
interface RandomAccess http://java.sun.com/j2se/1.5.0/docs/api/java/util/RandomAccess.html

? interface Serializable http://java.sun.com/j2se/1.5.0/docs/api/java/io/Serializable.html

? interface Comparable http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Comparable.html

One can see that these ?interfaces? are really not interface in
nature, but properties. One might ask, in ?interfaces? such as
RandomAccess that doesn't have a single variable or method, in what
technical definition that a class is said to satisfy such interfaces?
And, given the existence of these property-like interfaces, can a
programer define their own arbitrary computational property contract?
For example, suppose i want a property ConstantTime for the classes in
game i'm developing. Once i declared a class to have ?interface?
ConstantTime, apparently my class is not going to magically become
constant time. How do i define arbitrary properties to the compiler,
and how's the compiler going to check? The following are the answers.
20050224

Java's Interface has mutated so much from the interface concept that
it also functions as a pure label. If a interface does not have any
variables or methods, any class can declare it as a interface. There
is no restraint whatsoever. For example, the RandomAccess interface in
Java does not have any variables or methods. Any class can declare it
as a interface, randomly accessible or not. When interface is used as
a label, it is called a ?marker interface? by the Java documentation.
For example, see http://java.sun.com/j2se/1.5.0/docs/api/java/util/RandomAccess.html

Because the multi-inheritance nature of Java interface, and its double
role as a label, it no longer function as a communication facade that
is the meaning of interface. If a Java class have interfaces A, B, C,
D, E, one cannot be sure just exactly what methods or variables the
class have. (it will be a union of them, and some of them do not serve
any function with respect to the language.) Further, using interface
as a inert label to indicate computational properties (e.g.
RandomAccess) is a egregious incompetence in the design of a language
for computation. The gist of the problem is that it is a piece of
mathematical irrelevance in the language. As a labeling mechanism in a
language, for the possible benefit from the software engineering
perspective, then it should not be designed as part of the Class
Interface, since labeling and programing interfaces are semantically
disparate.
On the Inanity of Standard Java Tutorials

The standard Java tutorials out there are often inane, in that none of
them actually tried to teach what the language actually manifestly do,
but instead, often talk in some purportedly good engineering
perspective.

For a incomprehensible metaphysical intro to interface using bicycle,
see this page of the Official Java Tutorial:
http://java.sun.com/docs/books/tutorial/java/concepts/interface.html.
For a more detailed account of Interface using baffling financial
stocks, see this page of the Official Java Tutorial:
http://java.sun.com/docs/books/tutorial/java/interpack/createinterface.html.
(the official Java Tutorial has went into major changes in 2006. For
the version of the above two pages, see local copy as of 2005

PS the official Java tutorial thru its update history has changed its
stance about what's a interface:

before 2005:
Definition: An interface is a named collection of method definitions
(without implementations). An interface can also declare constants.

sometimes after 200501:
Definition: An interface is a device that unrelated objects -- objects
that are not related by class hierarchy -- can use to interact with
each other. An object can implement multiple interfaces.

Complexer and complexer. Note its use of the word ?device?.

In its current incarnation (as of 2006-08-14) of the tutorial
http://java.sun.com/docs/books/tutorial/java/IandI/index.html,
interface is not particularly given a definition.

References:
Java lang spec, 2nd ed, 8.4.2 on Method Signature,
http://java.sun.com/docs/books/jls/second_edition/html/classes.doc.html#38649
Official Java documentation page for 1.5.0, where it calls itself API.
http://java.sun.com/j2se/1.5.0/docs/api/overview-summary.html

------------
This post is archived at:
http://xahlee.org/java-a-day/interface.html

  Xah
  xah at xahlee.org
? http://xahlee.org/



From luismgz at gmail.com  Mon Mar 19 23:18:21 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 19 Mar 2007 20:18:21 -0700
Subject: Passing arguments to a command line from a python script
In-Reply-To: <jfWdndO1v_vC0WLYnZ2dnUVZ_rzinZ2d@comcast.com>
References: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>
	<mailman.5313.1174350370.32031.python-list@python.org>
	<1174354958.815878.95020@d57g2000hsg.googlegroups.com>
	<1174355342.669635.302960@y80g2000hsf.googlegroups.com>
	<1174355637.450275.148340@l77g2000hsb.googlegroups.com>
	<jfWdndO1v_vC0WLYnZ2dnUVZ_rzinZ2d@comcast.com>
Message-ID: <1174360701.772256.231880@o5g2000hsb.googlegroups.com>

On Mar 19, 11:52 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Luis M. Gonz?lez wrote:
> > On Mar 19, 10:49 pm, "zacherates" <zachera... at gmail.com> wrote:
> >> This implies that `os.system("setuppy py2exe")` should do what you
> >> want.
>
> > It works!
> > Thank you, this is just what I wanted.
>
> You'll get better error checking if instead you do::
>
>      >>> import subprocess
>      >>> subprocess.call(['setup.py', 'py2exe'])
>
> Actually, you probably should really be doing::
>
>      >>> subprocess.call(['python', 'setup.py', 'py2exe'])
>
> so that you don't have to assume the OS knows how to run a .py file.
>
> STeVe

Noted.
Thanks STeVe!






From aleax at mac.com  Sun Mar 18 21:21:41 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 18:21:41 -0700
Subject: * operator--as in *args?
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
	<1174254032.155494.228530@e65g2000hsc.googlegroups.com>
	<1174266469.127020.186120@l77g2000hsb.googlegroups.com>
Message-ID: <1hv6o86.18ve0cc11prsg8N%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> On Mar 18, 3:40 pm, "Dustan" <DustanGro... at gmail.com> wrote:
> > For example:
> > aFunction(*(1,2,3))
> > is equivalent to:
> > aFunction(1,2,3)
> >
> 
> That's the context I've seen it in, but written like this:
> 
> someFunc(*args)
> 
> I played around with it a little bit, and it appears the * operator
> unpacks a list, tuple, or dictionary so that each element of the
> container gets assigned to a different parameter variable.  Although
> with a dictionary, only the keys appear to be assigned to the
> parameter variables, e.g.:
> 
> def g(a,b,c):
>         print a, b, c
> 
> dict = {"x":10, "y":20, "z":30}
> g(*dict)
> 
> Is that right?

As far as it goes, yes.  More generally, with any iterable x, the *x
construct in function call will pass as positional arguments exactly
those items which (e.g.) would be printed by the loop:
    for item in x: print x

[[this applies to iterators, generators, genexps, and any other iterable
you may care to name -- not just lists, tuples, dicts, but also sets,
files open for reading [the items are the lines], etc, etc]].


Alex


From starGaming at gmail.com  Thu Mar 22 12:22:09 2007
From: starGaming at gmail.com (starGaming at gmail.com)
Date: 22 Mar 2007 09:22:09 -0700
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <mailman.5425.1174512989.32031.python-list@python.org>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<1174506107.863399.7970@l75g2000hse.googlegroups.com>
	<mailman.5425.1174512989.32031.python-list@python.org>
Message-ID: <1174580529.081658.326800@b75g2000hsg.googlegroups.com>

On Mar 21, 11:11 pm, Sander Steffann <s.steff... at computel.nl> wrote:
> Hi,
>
> Op 21-mrt-2007, om 20:41 heeft starGam... at gmail.com het volgende
> geschreven:
>
>
>
> > On Mar 21, 11:07 am, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> >> In article <etpcon$1g8... at ulysses.news.tiscali.de>, Stargaming wrote:
> >>> from sys import version_info
> >>> if version_info[0] < 2 or version_info[1] < 4:
> >>>      raise RuntimeError("You need at least python2.4 to run this
> >>> script")
>
> >> That'll fail when the major version number is increased (i.e.
> >> Python 3.0).
>
> >> You want:
>
> >>   if sys.hexversion < 0x020400f0:
> >>     ... error ...
>
> > Yes, it was intended to be and 'and' instead of an 'or'.
>
> If you make it an 'and' it will not raise the exception on version
> like 1.5 or 2.3... If you realy want to use version_info, you'll have
> to do something like:
>
> if version_info[0] < 2 or (version_info[0] == 2 and version_info[1] <
> 4):
>     raise RuntimeError
>
> - Sander


I don't see any problem with::

if version_info[0] <= 2 and version_info[1] < 4:
    raise RuntimeError()

Huh?



From mccredie at gmail.com  Thu Mar 15 16:22:32 2007
From: mccredie at gmail.com (Matimus)
Date: 15 Mar 2007 13:22:32 -0700
Subject: problem with str()
In-Reply-To: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
Message-ID: <1173990152.205823.105840@o5g2000hsb.googlegroups.com>

Don't use built-ins as variable names. Your code will work if you
change this:

> methodList = [str for str in names if callable(getattr(obj, str))]

to this:
> methodList = [s for s in names if callable(getattr(obj, s))]



From max at alcyone.com  Fri Mar  2 00:48:50 2007
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 01 Mar 2007 21:48:50 -0800
Subject: Questions about app design - OOP with python classes
In-Reply-To: <pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
Message-ID: <X_adneH8b-1eJ3rYnZ2dnUVZ_sLinZ2d@speakeasy.net>

Steven D'Aprano wrote:

> A type system doesn't help. So what if they're both floats? The test
> is still bogus, your code will still wait too long to engage the
> retro-rockets, and the billion dollar space craft will still be travelling
> at hundreds of miles an hour when it reaches the surface of Mars.

It was units of momentum that were inappropriately compared, actually. 
(And it broke up before hitting the ground, but that's a minor quibble.)

-- 
Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
  San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis
   Possibilities travel / Endless through infinity
    -- Chante Moore


From B.Ogryczak at gmail.com  Mon Mar  5 05:11:50 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 5 Mar 2007 02:11:50 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <m2lkic2f2z.fsf@cochabamba.cs.uu.nl>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
	<1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<m2lkic2f2z.fsf@cochabamba.cs.uu.nl>
Message-ID: <1173089510.258246.37250@t69g2000cwt.googlegroups.com>

On Mar 5, 10:51 am, Piet van Oostrum <p... at cs.uu.nl> wrote:
> >>>>> "Bart Ogryczak" <B.Ogryc... at gmail.com> (BO) wrote:
> >BO> Any system with 8-bit bytes, which would mean any system made after
> >BO> 1965. I'm not aware of any Python implementation for UNIVAC, so I
> >BO> wouldn't worry ;-)
>
> 1965? I worked with non-8-byte machines (CDC) until the beginning of the
> 80's. :=( In fact in that time the institution where Guido worked also had such
> a machine, but Python came later.

Right, I should have written 'designed' not 'made'. UNIVACs also have
been produced until early 1980s. Anyway, I'd call it
paleoinformatics ;-)







From Matthew.Cahn at gmail.com  Thu Mar  1 10:31:12 2007
From: Matthew.Cahn at gmail.com (Matthew.Cahn at gmail.com)
Date: 1 Mar 2007 07:31:12 -0800
Subject: starship.python.net is down
In-Reply-To: <1172522790.976949@sj-nntpcache-2.cisco.com>
References: <1171634223.13643@sj-nntpcache-2.cisco.com>
	<1172072586.601115.304110@s48g2000cws.googlegroups.com>
	<1172522790.976949@sj-nntpcache-2.cisco.com>
Message-ID: <1172763071.735981.29000@s48g2000cws.googlegroups.com>

On Feb 26, 3:46 pm, Tom Bryan <tom... at cisco.com> wrote:
> Matthew.C... at gmail.com wrote:
> > Any news onstarship.python.net?  It still seems to bedown.
>
> Yes.  Unfortunately, there may be a hardware problem.  Stefan, the admin
> who owns the hosted machine, is working with the host company to
> determine what's going on.  I think that they are still in the
> "investigation" stage at the moment, so it's hard to give an estimate of
> when the problem will be fixed.
>
> Thanks for your patience,
> ---Tom

I appreciate the update.

Thanks,
Matthew



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  1 04:38:44 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 01 Mar 2007 10:38:44 +0100
Subject: Tuples vs Lists: Semantic difference
References: <slrneubq5t.1j3.rshepard@salmo.appl-ecosys.com>
	<87slcqvskr.fsf@benfinney.id.au>
	<mailman.4538.1172705434.32031.python-list@python.org>
	<54ms6fF21c6h3U2@mid.individual.net>
	<mailman.4550.1172720725.32031.python-list@python.org>
Message-ID: <54nl94F21ft8aU2@mid.individual.net>

Ben Finney wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>

>> Explain.
> 
> Well, since you ask so politely :-)

I admit, sometimes I'm a little short-spoken ;)
 
>> I know tuples as immutable lists ...
> 
> That's a common misconception.
> [...]

Thanks for pointers, there's more to it than I suspected.

Regards,


Bj?rn

-- 
BOFH excuse #384:

it's an ID-10-T error



From ptmcg at austin.rr.com  Fri Mar 16 02:40:11 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 15 Mar 2007 23:40:11 -0700
Subject: Circular Class Logic
In-Reply-To: <1174010549.473733.270810@l77g2000hsb.googlegroups.com>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
	<1173962904.306751.86160@n76g2000hsh.googlegroups.com>
	<1173984908.706651.50260@y80g2000hsf.googlegroups.com>
	<1173986733.127500.250250@b75g2000hsg.googlegroups.com>
	<1174010549.473733.270810@l77g2000hsb.googlegroups.com>
Message-ID: <1174027211.183271.258410@b75g2000hsg.googlegroups.com>

On Mar 15, 9:02 pm, half.ital... at gmail.com wrote:
> > > How is that (using 'super') really different from this:
>
> class Disk(Folder):
>   def __init__(self,driveLetter):
>     Folder.Folder.__init__(self, driveLetter + ":/")
>

Google for "python super" - there is documentation on this, plus some
interesting c.l.py threads and blog scribblings on the behavior and
good/bad aspects of super.  You may be better off using the explicit
class calls as you have.  I always assumed that super, being added to
the language later, represented some form of improvement, but this may
not be 100% correct.

-- Paul



From michele.simionato at gmail.com  Wed Mar  7 02:18:20 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 6 Mar 2007 23:18:20 -0800
Subject: Project organization and import
In-Reply-To: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
Message-ID: <1173251900.867864.125520@q40g2000cwq.googlegroups.com>

On Mar 5, 1:21 am, "Martin Unsal" <martinun... at gmail.com> wrote:

> 2) Importing and reloading. I want to be able to reload changes
> without exiting the interpreter.

What about this?

$ cat reload_obj.py
"""
Reload a function or a class from the filesystem.

For instance, suppose you have a module

$ cat mymodule.py
def f():
    print 'version 1 of function f'

Suppose you are testing the function from the interactive interpreter:

>>> from mymodule import f
>>> f()
version 1 of function f

Then suppose you edit mymodule.py:

$ cat mymodule.py
def f():
    print 'version 2 of function f'

You can see the changes in the interactive interpreter simply by doing

>>> f = reload_obj(f)
>>> f()
version 2 of function f
"""

import inspect

def reload_obj(obj):
    assert inspect.isfunction(obj) or inspect.isclass(obj)
    mod = __import__(obj.__module__)
    reload(mod)
    return getattr(mod, obj.__name__)

Pretty simple, isn't it?

The issue is that if you have other objects dependending on the
previous version
of the function/class, they will keep depending on the previous
version, not on
the reloaded version, but you cannot pretende miracles from reload! ;)

You can also look at Michael Hudson's recipe

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/160164

for a clever approach to automatic reloading.

           Michele Simionato



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  9 18:34:08 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 10 Mar 2007 00:34:08 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
	<1173449933.926669.90810@n33g2000cwc.googlegroups.com>
	<55d9ehF24cdi0U1@mid.uni-berlin.de>
	<1173452206.029944.255750@j27g2000cwj.googlegroups.com>
Message-ID: <55e97gF24mu1tU1@mid.individual.net>

dbhbarton at googlemail.com wrote:

> But # is 'only a comment sign' as well, and equally meaningless to
> the interpreter. 

No! "#" means "disregard everything until EOL" to the interpreter.
Your proposed highlighting character means exactly nothing to the
interpreter. Get the difference?

> But it's still part of the language, very very 
> useful and I profit from its existence every day.

See above, comment tokens do have syntactical meaning.
 
> If you can highlight an entire block with a single character,
> won't there be _less_ visual clutter than the current way of
> achieving the same effect with # comments?

You can't "highlight" something with comments. It will become a
comment and not be executed.

Some editors may display comments in a different manner, yes. But
that's not what comments are for -- the different display is just
for convenience.

>> So - if you want that feature, patch your editor of choice to
>> deal with that comments, make them added and removed with a key
>> stroke, whatever - be my guest.
> 
> Would if I could!

Why don't you grab a good editor ...
 
> What we're talking about here is a form of 'alternate commenting
> style'. With the IDE's cooperation it'd work on whole blocks at
> once,

I know editors that can select blockwise without any special
characters in the source, just by keystrokes ...

> it would highlight without disrupting the code concerned (at 
> least the way I'm envisaging it), it would be versatile (could
> probably be used for as big a variety of purposes as the #
> comment),

Any kind of highlighting is absolutely different from comments.

> and yes, it'd be persistent, which is how it would be 
> different from any IDE-based highlighting.

(Why shouldn't other ways of highlighting be persistent? Metadata
exists.)
 
> I think that'd be most useful. You don't. So far nobody else here
> does either, and I've not persuaded anybody differently. Fair
> enough!

Agreed.

Regards,


Bj?rn

P.S.: More and more I'm getting the impression that everybody should
first learn to program with a most simple editor. The typical
Java+Eclipse start is wrong, IMHO ...

-- 
BOFH excuse #225:

It's those computer people in X {city of world}.  They keep stuffing
things up.



From gregpinero at gmail.com  Fri Mar  9 15:30:26 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 9 Mar 2007 12:30:26 -0800
Subject: How to Start a (thread?) and Leave
In-Reply-To: <1173471925.876213.170820@j27g2000cwj.googlegroups.com>
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
	<1173471925.876213.170820@j27g2000cwj.googlegroups.com>
Message-ID: <1173472226.698504.147260@h3g2000cwc.googlegroups.com>

On Mar 9, 3:25 pm, "abcd" <codecr... at gmail.com> wrote:
> probably a Thread.


But a thread leaves the script running until the thread exits, right?
So the webpage would just keep saying "loading" at the bottom I think.

-Greg



From cmfvulcanius at gmail.com  Thu Mar  8 13:35:44 2007
From: cmfvulcanius at gmail.com (cmfvulcanius at gmail.com)
Date: 8 Mar 2007 10:35:44 -0800
Subject: Reading a portion of a file
In-Reply-To: <1173376256.933492.71410@c51g2000cwc.googlegroups.com>
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
	<1173372768.823896.32710@n33g2000cwc.googlegroups.com>
	<1173375977.853461.68240@v33g2000cwv.googlegroups.com>
	<1173376256.933492.71410@c51g2000cwc.googlegroups.com>
Message-ID: <1173378944.595861.190980@c51g2000cwc.googlegroups.com>

On Mar 8, 12:50 pm, "Jordan" <jordan.tayl... at gmail.com> wrote:
> On Mar 8, 12:46 pm, "Jordan" <jordan.tayl... at gmail.com> wrote:
>
>
>
> > On Mar 8, 11:52 am, "Rune Strand" <rune.str... at gmail.com> wrote:
>
> > > On Mar 8, 5:12 pm, cmfvulcan... at gmail.com wrote:
>
> > > > I am using a script with a single file containing all data in multiple
> > > > sections. Each section begins with "#VS:CMD:command:START" and ends
> > > > with "#VS:CMD:command:STOP". There is a blank line in between each
> > > > section. I'm looking for the best way to grab one section at a time.
> > > > Will I have to read the entire file to a string and parse it further
> > > > or is it possible to grab the section directly when doing a read? I'm
> > > > guessing regex is the best possible way. Any help is greatly
> > > > appreciated.
>
> > > Seems like something along these line will do:
>
> > > _file_ = "filepart.txt"
>
> > > begin_tag = '#VS:CMD:command:START'
> > > end_tag = '#VS:CMD:command:STOP'
>
> > > sections = []
> > > new_section = []
> > > for line in open(_file_):
> > >     line = line.strip()
> > >     if begin_tag in line:
> > >         new_section = []
> > >     elif end_tag in line:
> > >         sections.append(new_section)
> > >     else:
> > >         if line: new_section.append(line)
>
> > > for s in sections: print s
>
> > > If your want more control, perhaps flagging "inside_section",
> > > "outside_section" is an idea.
>
> > You probably don't want to use regex for something this simple; it's
> > likely to make things even more complicated.  Is there a space between
> > the begin_tag and the first word of a section (same question with the
> > end_tag)?
>
> Sent the post too soon.  What is the endline character for the file
> type?  What type of file is it?    An example section would be nice
> too.  Cheers.

Ok, regex was my first thought because I used to use grep with Perl
and shell scripting to grab everything from one pattern to another
pattern. The file is just an unformatted file. What is below is
exactly what is in the file. There are no spaces between the beginning
and ending tags and the content. Would you recommend using spaces
there? And if so, why?

A sample of the file:

#VS:COMMAND:df:START
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/vzfs             20971520    517652  20453868   3% /
tmpfs                  2016032        44   2015988   1% /var/run
tmpfs                  2016032         0   2016032   0% /var/lock
tmpfs                  2016032         0   2016032   0% /dev/shm
tmpfs                  2016032        44   2015988   1% /var/run
tmpfs                  2016032         0   2016032   0% /var/lock
#VS:COMMAND:df:STOP

#VS:FILE:/proc/loadavg:START
0.00 0.00 0.00 1/32 14543
#VS:FILE:/proc/loadavg:STOP

#VS:FILE:/proc/meminfo:START
MemTotal:       524288 kB
MemFree:        450448 kB
Buffers:             0 kB
Cached:              0 kB
SwapCached:          0 kB
Active:              0 kB
Inactive:            0 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:       524288 kB
LowFree:        450448 kB
SwapTotal:           0 kB
SwapFree:            0 kB
Dirty:               0 kB
Writeback:           0 kB
Mapped:          73840 kB
Slab:                0 kB
CommitLimit:         0 kB
Committed_AS:   248704 kB
PageTables:          0 kB
VmallocTotal:        0 kB
VmallocUsed:         0 kB
VmallocChunk:        0 kB
#VS:FILE:/proc/meminfo:STOP

#VS:FILE:/proc/stat:START
cpu  67188 0 26366 391669264 656686 0 0
cpu0 24700 0 10830 195807826 373309 0 0
cpu1 42488 0 15536 195861438 283376 0 0
intr 0
swap 0 0
ctxt 18105366807
btime 1171391058
processes 26501285
procs_running 1
procs_blocked 0
#VS:FILE:/proc/stat:STOP

#VS:FILE:/proc/uptime:START
1962358.88 1577059.05
#VS:FILE:/proc/uptime:STOP



From sjmachin at lexicon.net  Fri Mar  2 19:33:57 2007
From: sjmachin at lexicon.net (John Machin)
Date: 2 Mar 2007 16:33:57 -0800
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <1172882037.600036.201060@n33g2000cwc.googlegroups.com>

On Mar 3, 9:44 am, "Shawn Milo" <S... at Milochik.com> wrote:
> I'm new to Python and fairly experienced in Perl, although that
> experience is limited to the things I use daily.
>
> I wrote the same script in both Perl and Python, and the output is
> identical. The run speed is similar (very fast) and the line count is
> similar.
>
> Now that they're both working, I was looking at the code and wondering
> what Perl-specific and Python-specific improvements to the code would
> look like, as judged by others more knowledgeable in the individual
> languages.
>
> I am not looking for the smallest number of lines, or anything else
> that would make the code more difficult to read in six months. Just
> any instances where I'm doing something inefficiently or in a "bad"
> way.
>
> I'm attaching both the Perl and Python versions, and I'm open to
> comments on either. The script reads a file from standard input and
> finds the best record for each unique ID (piid). The best is defined
> as follows: The newest expiration date (field 5) for the record with
> the state (field 1) which matches the desired state (field 6). If
> there is no record matching the desired state, then just take the
> newest expiration date.
>

[big snip]
Here is my rewrite in what I regard as idiomatic reasonably-modern
Python (OMMV of course). A few of the comments are applicable
irrespective of the language used.

HTH,
John
8<------
#! /usr/bin/env python

### Layout: Use 4-space indent. Don't use tabs. Don't exceed 79 chars
per line.

import sys

def process_file(opened_file=sys.stdin):
    ### Local variable access is faster than global

    ### input = sys.stdin ### shadowing built_in function "input"

    ### Use names to access elements in rows
    PIID = 0
    ACTUAL_STATE = 1
    DESIRED_STATE = 6
    EXPIRY_DATE = 5

    recs = {}

    for row in opened_file:
        row = row.rstrip('\n').split('\t')
        ### Do the split('\t') *once* per row
        piid = row[PIID]
        ### if recs.has_key(piid) is False:
        ### has_key() is ancient
        ### "if boolean_expression is False" is megabletchworthy;
        ### use "if not boolean_expression"
        if piid not in recs:
            recs[piid] = []
        recs[piid].append(row)

    ### for piid in recs.keys():
    for piid in recs:
        best = None ### use out-of-band sentinel
        for current in recs[piid]:
            if best is None:
                best = current ### had cockroach crap (";") at EOL
            else:
                #If the current record is the correct state
                ### Clear code (like the next line) doesn't need
comments
                ### like the above line
                if current[ACTUAL_STATE] == current[DESIRED_STATE]:
                    if best[ACTUAL_STATE] == best[DESIRED_STATE]:
                        if current[EXPIRY_DATE] > best[EXPIRY_DATE]:
                            best = current
                    else:
                        best = current
                else:
                    if (best[ACTUAL_STATE] != best[ACTUAL_STATE]
                    and current[EXPIRY_DATE] > best[EXPIRY_DATE]):
                        best = current
        print "\t".join(best)

if __name__ == "__main__":
    ### Standard idiom to avoid executing script content
    ### when/if file is imported
    process_file()
8<----




From arnodel at googlemail.com  Tue Mar 13 17:16:32 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 13 Mar 2007 14:16:32 -0700
Subject: Iterating across a filtered list
In-Reply-To: <mailman.5035.1173819607.32031.python-list@python.org>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<mailman.5035.1173819607.32031.python-list@python.org>
Message-ID: <1173820592.220605.64040@l77g2000hsb.googlegroups.com>

On Mar 13, 8:59 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
[snip]
> def find(self, search):
>      search_re = re.compile(search, re.IGNORECASE)
>      for result in [self.contacts[name] for name in self.contacts if  
> search_re.match(name)]:
>          print result

I do not see how

for y in [f(x) for x in L if g(x)]:
    do stuff with y

can be preferable to

for x in L:
    if g(x):
        do stuff with f(x)

What can be the benefit of creating a list by comprehension for the
sole purpose of iterating over it?

--
Arnaud



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 11 08:18:22 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 13:18:22 +0100
Subject: a better solution for GUI in python
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
	<1173613976.277044.242160@8g2000cwh.googlegroups.com>
Message-ID: <55iaceF24d6qgU2@mid.individual.net>

StD wrote:

> I'd recommend pyGTK. It's easy to use, delivers astonishing
> results and is perfectly portable as far as I know. 

And how does it look on Windows? :)

> I'm working with it myself, having the goal of simplicity as well
> as portability and I got to say, it works! Hope that was helpful.

Could say the same about wxWidgets, and Qt (the latter only with C++
though).

Regards,


Bj?rn

-- 
BOFH excuse #52:

Smell from unhygienic janitorial staff wrecked the tape heads



From http  Thu Mar  8 13:36:40 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 10:36:40 -0800
Subject: merits of Lisp vs Python
References: <1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<RxPHh.10406$tD2.5273@newsread1.news.pas.earthlink.net>
	<mailman.4809.1173377788.32031.python-list@python.org>
Message-ID: <7xabynh9af.fsf@ruckus.brouhaha.com>

"Chris Mellon" <arkanes at gmail.com> writes:
> Any *real* hosting provider is going to support whatever
> language and environment I tell them to, because I'm going to pay them
> a lot of money for excellent support and if they give me any trouble I
> will go with someone who provides what I want.

Hosting providers are generally not in the business of doing anything
like that, except the low end ones that mostly support PHP.  

> What was *meant* was low priced, zero maintenance, reasonably reliable
> consumer level hosting. Thats a totally different market, it's not
> "industrial strength", and it doesn't merit the emphasis on *real*
> provider. And it is true that in that realm Python is not well
> represented.

Python is not so well represented in "industrial strength" hosting
either; that kind of hosting generally leaves language support up to
the customer.


From steveo at syslang.net  Tue Mar 27 11:17:43 2007
From: steveo at syslang.net (Steven W. Orr)
Date: Tue, 27 Mar 2007 11:17:43 -0400 (EDT)
Subject: exit to interpreter?
In-Reply-To: <B67ED58E-8982-43E0-8199-694763047BC2@cs.hmc.edu>
References: <B67ED58E-8982-43E0-8199-694763047BC2@cs.hmc.edu>
Message-ID: <alpine.LFD.0.83.0703271116360.8719@saturn.syslang.net>

On Friday, Mar 23rd 2007 at 10:52 -0700, quoth belinda thom:

=>I'm writing a function that polls the user for keyboard input,  
=>looping until it has determined that the user has entered a valid  
=>string of characters, in which case it returns that string so it can  
=>be processed up the call stack. My problem is this. I'd also like it  
=>to handle a special string (e.g. 'quit'), in which case control  
=>should return to the Python command line as opposed to returning the  
=>string up the call stack.
=>
=>sys.exit seemed like a good choice, but it exits the python interpreter.
=>
=>I could use an exception for this purpose, but was wondering if  
=>there's a better way?

I was reading other people's responses. Why not simply use the python 
debugger?

http://docs.python.org/lib/module-pdb.html

Yes? No?

-- 
Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
happened but none stranger than this. Does your driver's license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren't a hypothetical question?
steveo at syslang.net


From sjmachin at lexicon.net  Sat Mar 17 20:01:34 2007
From: sjmachin at lexicon.net (John Machin)
Date: 17 Mar 2007 17:01:34 -0700
Subject: formatting strings to have the same width
In-Reply-To: <1174173428.779736.298390@p15g2000hsd.googlegroups.com>
References: <1174172864.205137.193740@y66g2000hsf.googlegroups.com>
	<1174173428.779736.298390@p15g2000hsd.googlegroups.com>
Message-ID: <1174176094.113870.224670@b75g2000hsg.googlegroups.com>

On Mar 18, 10:17 am, "spohle" <spo... at gmail.com> wrote:
> sorry the code should read:
>
> foo = ["aaa", "1232"]
> for each in foo:
>     print each.center(10, " ") + " | "

Works OK for me on the console:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
(Intel)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
>>> foo = ['123', '1234', '12345']
>>> for each in foo:
...     print each.center(10, ".") + " | "
...
...123.... |
...1234... |
..12345... |
>>>
>>> for each in foo:
...     print each.center(10, " ") + " | "
...
   123     |
   1234    |
  12345    |
>>> for each in foo:
...     guff = each.center(10, " ") + " | "
...     print guff + str(len(guff))
...
   123     | 13
   1234    | 13
  12345    | 13
>>>

Of course if I go into IDLE and change it to use a proportionally
spaced font (e.g. Arial), and do this:

>>> foo = ['lllll', 'mmmmm']
>>> for each in foo:
	print each.center(10, ' ') + ' | '


  lllll    |
  mmmmm    |
>>>

naturally they don't line up. If something like that isn't the cause
of your problem, you'll need to provide more information about your
environment.

HTH,
John



From maxerickson at gmail.com  Tue Mar 20 21:44:06 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Wed, 21 Mar 2007 01:44:06 +0000 (UTC)
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
Message-ID: <Xns98F9DD19C415Fmaxericksongmailcom@80.91.229.5>

Mark <markbpan at mailinator.com> wrote:

...
> #!/usr/bin/env python
> from myprog import main
> if __name__ == "__main__":
>     main()
> 
> Of course this compiles myprog.py into myprog.pyc on first run as
> I am wanting.
> 
> I have one of these stubs for all my python scripts I've created
> so far. Is there not a better way? Do I have to create a separate
> stub each time? I find it a bit messy to require a pair of
> scripts for each utility and it also contributes some
> inefficiency. Given the above stub is so boilerplate, why does
> python not provide a general stub/utility mechanism for this?

I don't know of a better way to organize things, but as an 
alternative, you could have a script where you import each of the 
scripts that you want compiled, python will write the compiled files 
to disk when you run it(thus avoiding the need to split the other 
scripts). There are also the py_compile and compileall modules, which 
have facilities for generating byte code.

More here:

http://effbot.org/zone/python-compile.htm

under 'Compiling python modules to byte code'.


max



From bbxx789_05ss at yahoo.com  Sun Mar 25 01:11:49 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 22:11:49 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1hvhzvb.1qccr1i1ok96m7N%aleax@mac.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5571.1174789089.32031.python-list@python.org>
	<1174794013.752495.42220@o5g2000hsb.googlegroups.com>
	<1174794172.156941.107550@y66g2000hsf.googlegroups.com>
	<1hvhzvb.1qccr1i1ok96m7N%aleax@mac.com>
Message-ID: <1174799509.212761.34380@n76g2000hsh.googlegroups.com>

On Mar 24, 10:04 pm, a... at mac.com (Alex Martelli) wrote:
1462 Feb 20 14:31 ..
>
> Try /System/Library/Frameworks ...
>
> Alex

There it is.  I notice there is a directory: ..../Python.framework/
Versions/2.3/Mac/Tools/IDE
which has a bunch of files in it.  Do Macs have some kind of pre-
installed Python IDE?  There's no read me file, so I can't tell what
all the files are for.




From Emile.Boudreau at cognos.com  Tue Mar 20 13:50:51 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Tue, 20 Mar 2007 13:50:51 -0400
Subject: Subject line with smtplib.sendmail()
In-Reply-To: <etotbk$b1c$1@sea.gmane.org>
References: <09042D621CD4AA479C678463F3A646D0E88404@sottemail1.ent.ad.cognos.com>
	<etotbk$b1c$1@sea.gmane.org>
Message-ID: <09042D621CD4AA479C678463F3A646D0E884D5@sottemail1.ent.ad.cognos.com>

Thanks for the reply. When I use the instruction from that list this is
the email I receive. I'm using Outlook.

Working.on at server.com
To:
------------------------------
	From: Working.On at server.com
	To: Emile.Boudreau at server.com
	Subject: Hello!

	This Still DOESN't Work!!!!!!!!!!!!
	
It's just adding the "From" "To" "Subject" in the message itself. I want
to have each field at the correct place and then just the msg in the
body.

Any Help?? Thanks


Emile Boudreau


-----Original Message-----
From: python-list-bounces+emile.boudreau=cognos.com at python.org
[mailto:python-list-bounces+emile.boudreau=cognos.com at python.org] On
Behalf Of Fredrik Lundh
Sent: Tuesday, March 20, 2007 11:08 AM
To: python-list at python.org
Subject: Re: Subject line with smtplib.sendmail()

Boudreau, Emile wrote:

> I'm trying to send mail from my server to my machine with test 
> results. I can send the email no problem however, the email doesn't 
> contain a "recipient list" or a "subject line". I was wondering how 
> would I go about getting the information on the actual "To" and 
> "Subject" lines so that I know to whom the email was sent and the 
> subject line without opening the email?

you have to add the headers yourself.  see the example in the library
reference, or this FAQ entry:

    http://effbot.org/pyfaq/how-do-i-send-mail-from-a-python-script

</F> 



--
http://mail.python.org/mailman/listinfo/python-list
 
     This message may contain privileged and/or confidential information.  If you have received this e-mail in error or are not the intended recipient, you may not use, copy, disseminate or distribute it; do not open any attachments, delete it immediately from your system and notify the sender promptly by e-mail that you have done so.  Thank you.


From michael at jedimindworks.com  Mon Mar 26 09:18:55 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Mon, 26 Mar 2007 08:18:55 -0500
Subject: python on window
In-Reply-To: <1174910454.043983.171650@y80g2000hsf.googlegroups.com>
References: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
	<mailman.5507.1174641107.32031.python-list@python.org>
	<1174910454.043983.171650@y80g2000hsf.googlegroups.com>
Message-ID: <78A518BE-4512-4D1C-ABB6-6D32F43ECCCC@jedimindworks.com>


On Mar 26, 2007, at 7:00 AM, sandeep patil wrote:
> i have written this program but i have gott following error,
> in anather proram "indentation error" sir how i will indent in my
> editor
>
> #test.py
>>>> def invert(table):
> 	index=()
> 	for key in table:
> 		value=table[key]
> 		if not index.has_key(value):
> 			index[value]=[]
> 			index[value].append(key)
> 		return index
>
>
>>>> phonebook = {'sandeep':9325, 'amit':9822, 'anand':9890, 'titu':  
>>>> 9325}
>>>> phonebook
> {'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
>>>> print phonebook
> {'titu': 9325, 'amit': 9822, 'anand': 9890, 'sandeep': 9325}
>>>> inverted_phonebook = invert(phonebook)
>
> Traceback (most recent call last):
>   File "<pyshell#13>", line 1, in <module>
>     inverted_phonebook = invert(phonebook)
>   File "<pyshell#9>", line 5, in invert
>     if not index.has_key(value):
> AttributeError: 'tuple' object has no attribute 'has_key'

If you define index as a dict instead of a tuple, you'll stop getting  
that error -- but I'm afraid it still won't do what you want.  Are  
you trying to get a phonebook in which the values of the original  
phonebook are the keys of the new one -- and the values are lists  
(both 'sandeep' and 'titu' have the same number)?  If so, try this:

def invert(table):
	index=dict()
	for k,v in table.items():
		if index.has_key(v):
			index[v].append(k)
		else:
			index[v] = [k]
	return index

You had mentioned something about indentation error...  If you'll  
look at your definition of invert(), you can see that 'return index'  
is inside the for loop -- which would cause a return before the  
second time through the for loop.  By dedenting (is that a word?) so  
'return' falls directly below 'for', the for loop would have been  
able to run to completion before returning.

Hope this helps,
Michael

---

Our network was brought down by a biscuit??? --Steven D'Aprano





From jstroud at mbi.ucla.edu  Thu Mar  1 05:17:33 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 01 Mar 2007 10:17:33 GMT
Subject: splitting perl-style find/replace regexp using python
In-Reply-To: <ODxFh.3179$BE2.2738@newssvr27.news.prodigy.net>
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
	<ODxFh.3179$BE2.2738@newssvr27.news.prodigy.net>
Message-ID: <1LxFh.3180$BE2.57@newssvr27.news.prodigy.net>

James Stroud wrote:
> John Pye wrote:
>> Hi all
>>
>> I have a file with a bunch of perl regular expressions like so:
>>
>> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
>> bold
>> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
>> b>''$3/ # italic bold
>> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
>> italic
>>
>> These are all find/replace expressions delimited as '/search/replace/
>> # comment' where 'search' is the regular expression we're searching
>> for and 'replace' is the replacement expression.
>>
>> Is there an easy and general way that I can split these perl-style
>> find-and-replace expressions into something I can use with Python, eg
>> re.sub('search','replace',str) ?
>>
>> I though generally it would be good enough to split on '/' but as you
>> see the <\/b> messes that up. I really don't want to learn perl
>> here :-)
>>
>> Cheers
>> JP
>>
> 
> This could be more general, in principal a perl regex could end with a 
> "\", e.g. "\\/", but I'm guessing that won't happen here.
> 
> py> for p in perlish:
> ...   print p
> ...
> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/
> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/b>''$3/
> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/
> py> import re
> py> splitter = re.compile(r'[^\\]/')
> py> for p in perlish:
> ...   print splitter.split(p)
> ...
> ['/(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$', 
> "$1'''$2'''$", '']
> ['/(^|[\\s\\(])\\_\\_([^ ].*?[^ ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$', 
> "$1''<b>$2<\\/b>''$", '']
> ['/(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$', 
> "$1''$2''$", '']
> 
> (I'm hoping this doesn't wrap!)
> 
> James

I realized that threw away the closing parentheses. This is the correct 
version:

py> splitter = re.compile(r'(?<!\\)/')
py> for p in perlish:
...   print splitter.split(p)
...
['', '(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$)', 
"$1'''$2'''$3", '']
['', '(^|[\\s\\(])\\_\\_([^ ].*?[^ 
])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$)', "$1''<b>$2<\\/b>''$3", '']
['', '(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$)', 
"$1''$2''$3", '']

James


From tomanishkb at gmail.com  Wed Mar 21 07:20:59 2007
From: tomanishkb at gmail.com (manish kurup)
Date: Wed, 21 Mar 2007 16:50:59 +0530
Subject: Exceptions and unicode messages
In-Reply-To: <fi8Mh.84$Ub6.17@read3.inet.fi>
References: <fi8Mh.84$Ub6.17@read3.inet.fi>
Message-ID: <783b47270703210420w5fd663evfe697e337ba4b2e8@mail.gmail.com>

Hey anybody please tell me...
How we can get the properties of a file in python....

On 3/21/07, Tuomas <tuomas.vesterinen at pp.inet.fi> wrote:
>
> This works:
> >>> raise StandardError(u'Wrong type')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> StandardError: Wrong type
>
> but don't in Finnish:
> >>> raise StandardError(u'V??r? tyyppi')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> StandardError>>>
> >>>
>
> Any solution in Python?
>
> TV
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From jkn_gg at nicorp.f9.co.uk  Fri Mar 30 13:37:13 2007
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 30 Mar 2007 10:37:13 -0700
Subject: clean up html document created by Word
In-Reply-To: <eujhd8$sh0$02$1@news.t-online.com>
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>
	<eujhd8$sh0$02$1@news.t-online.com>
Message-ID: <1175276233.762698.105550@n59g2000hsh.googlegroups.com>

IIUC, the original poster is asking about 'cleaning up' in the sense
of removing the swathes of unnecessary and/or redundant 'cruft' that
Word puts in there, rather than making valid HTML out of invalid HTML.
Again, IIUC, HTMLtidy does not do this.

If Beautiful Soup does, then I'm intererested!

    jon N



From lbates at websafe.com  Wed Mar 28 18:46:08 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 28 Mar 2007 17:46:08 -0500
Subject: Creating a new data structure while filtering its data origin.
In-Reply-To: <mailman.5727.1175117350.32031.python-list@python.org>
References: <mailman.5727.1175117350.32031.python-list@python.org>
Message-ID: <460AF030.5030308@websafe.com>

mmara at fibertel.com.ar wrote:
> Hi everyone.
> 
> I'm trying to work with very simple data structures but I'm stuck in the very first steps. If someone has the luxury of a few minutes and can give an advice how to resolve this, I'll really appreciate it.
> 
> 1- I have a list of tuples like this:
> lista= [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2), (168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203, 141, 1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568, 142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]
> and I want to end with a dict like this:
> {141: {1: [203, 213, 201], 2: [168, ], 3: [162, ]}, 142: {1: [503, 513, 501], 2: [568, ], 4: [562, ]}}
>  the logic of the final output:
>  a) the outer dict's key is a set() of the 2rd value of the input.
>  b) the inner dict's key is a set() of the 3th value for tuples which 3rd value equals a). 
>  c) the inner list will be fill up with the 1st value of every tuple which 3rd value equals b) and its 2rd value equals a).
> 
> So far, the only thing it seems I can achieve is the first part:
> outer_dict = dict([(x,dict()) for x in set(row[1] for row in lista)])
> 
>>From then on, I'm starting to get tired after several successful failures (I tried with itertools, with straight loops ...) and I don't know which can be the easier way to get that final output.
> 
> Thanks in advance.
> 
> 

d={}
for a, b, c in lista:
    if d.has_key(b):
        if d[b].has_key(c):
            if a not in d[b][c]: d[b][c].append(a)

        else:
                d[b][c]=[a]
    else:
        d[b]={c:[a]}


print d

-Larry Bates


From rkmr.em at gmail.com  Sun Mar 18 12:11:21 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Sun, 18 Mar 2007 09:11:21 -0700
Subject: list comprehension help
Message-ID: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>

Hi
I need to process a really huge text file (4GB) and this is what i
need to do. It takes for ever to complete this. I read some where that
"list comprehension" can fast up things. Can you point out how to do
it in this case?
thanks a lot!


f = open('file.txt','r')
for line in f:
        db[line.split(' ')[0]] = line.split(' ')[-1]
        db.sync()


From bayer.justin at googlemail.com  Fri Mar  2 11:56:05 2007
From: bayer.justin at googlemail.com (bayer.justin at googlemail.com)
Date: 2 Mar 2007 08:56:05 -0800
Subject: Dialog with a process via subprocess.Popen blocks forever
In-Reply-To: <mailman.4598.1172817024.32031.python-list@python.org>
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
	<mailman.4598.1172817024.32031.python-list@python.org>
Message-ID: <1172854565.031878.174430@64g2000cwx.googlegroups.com>

> If you are both waiting for input, you have a Mexican standoff...

That is not the problem. The problem is, that the buffers are not
flushed correctly. It's a dialogue, so nothing complicated. But python
does not get what the subprocess sends onto the subprocess' standard
out - not every time, anyway.

I'm quite confused, but hopefully will understand what's going on and
come back here.






From tew24 at spam.ac.uk  Wed Mar 21 13:19:44 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 17:19:44 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>	<mailman.5394.1174484981.32031.python-list@python.org>	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
	<mailman.5400.1174493337.32031.python-list@python.org>
Message-ID: <etrpfg$t8g$2@gemini.csx.cam.ac.uk>

Steve Holden wrote:
> Easy to say. How do you know the memory that's not in use is in a
> contiguous block suitable for return to the operating system? I can
> pretty much guarantee it won't be. CPython doesn't use a relocating
> garbage collection scheme

Fair point.  That is difficult and I don't see a practical solution to it
(besides substituting a relocating garbage collector, which seems like a
major undertaking).

> Right. So all we have to do is identify those portions of memory that
> will never be read again and return them to the OS. That should be easy.
> Not.

Well, you have this nice int free list which points to all the bits which
will never be read again (they might be written to, but if you're writing
without reading then it doesn't really matter where you do it).  The point
about contiguous chunks still applies though.


-- 
I'm at CAMbridge, not SPAMbridge


From richlow at infor-med.com  Fri Mar  2 12:20:03 2007
From: richlow at infor-med.com (Richard Low, MD)
Date: Fri, 02 Mar 2007 14:20:03 -0300
Subject: HL7 servers in Python?
Message-ID: <200703021120859.SM03288@room5.infor-med.com>

Richard,

I was most impressed by your answer below (in '03)

Do you know whether there is a third party application/library that 
can interface our software to the HL7 sockets systems so we do not 
have to develop them?

If you do, which one would you recommend?

Thank you,

[]

Richard M. Low MD
CEO
____________________________________
Infor-Med Corporation
6271 Variel Avenue, Suite A
Woodland Hills, California 91367-2512, USA
Phone:  818-592-2900
Direct fax: (818)743-7759
Email: <mailto:richlow at infor-med.com>richlow at infor-med.com
URL:  <http://www.infor-med.com/>http://www.infor-med.com










HL7 servers in Python?

Richard Sharp 
<mailto:python-list%40python.org?Subject=HL7%20servers%20in%20Python%3F&In-Reply-To=>rbsharp 
at gmx.de
Mon Jun 16 17:29:22 CEST 2003

    * Previous message: 
<http://mail.python.org/pipermail/python-list/2003-June/210414.html>"Structure 
and Interpretation of Computer Programs" in Python?
    * Next message: 
<http://mail.python.org/pipermail/python-list/2003-June/210188.html>HL7 
servers in Python?
    * Messages sorted by: 
<http://mail.python.org/pipermail/python-list/2003-June/date.html#210163>[ 
date ] 
<http://mail.python.org/pipermail/python-list/2003-June/thread.html#210163>[ 
thread ] 
<http://mail.python.org/pipermail/python-list/2003-June/subject.html#210163>[ 
subject ] 
<http://mail.python.org/pipermail/python-list/2003-June/author.html#210163>[ 
author ]

----------

On Fri, 13 Jun 2003 07:10:26 +1000, Tim Churches wrote:

 > Does anyone know of a Python HL7 socket server/daemon - that is, a
 > daemon which accepts socket connections on a TCP port from an HL7
 > source, receives an HL7 message via the connection, hands off the
 > message for processing, and then sends back an ACK or NACK H7 message -
 > usually synchronously, via a blocking connection (thus the server needs
 > to be multi-threaded)?
 >
 > HL7 stands for Health Level 7 (where 7 represents the 7th layer of the
 > OSI network stack) and is a widely-used standard for communication of
 > medical information. I'm not looking for HL7 message assembly or parsing
 > libraries, just the socket server bit. Perhaps the SocketServer module
 > in the Python library makes this so trivial that no-one has felt the
 > need to write a specific HL7 server in Python? Anyway, I've looked on
 > Google but can't spot anything obvious.

It is extremely doubtful, given the specialised nature of the question,
whether most people understand what you want. Given that HL7 is really
only sending and receiving some information in a curious format, and that
you either receive data and then send the other side an ACK or a NAK, or
wait until they do that in reply to your message, it is really not all
that complicated.

The short answer to you question ist Twisted -
<http://www.twistedmatrix.com>http://www.twistedmatrix.com

What may confuse you is that it does not use blocking sockets and
therefore does not need to be multithreaded, although I think it can be,
but it does work.

My bread and butter Python work is software that interfaces between a
Pathology System running any number of versions of Unix and some
overarching Hospital System that provides me with patient data and to
which I deliver reports and accounting data, mostly, but not always, in
HL7.

I have one Pathology Unit that does work for two hospitals and
communicates with two hospital systems. With Twisted I basically subclass
protocol.Factory and implement the necessary submethods.

It is a little daunting at first and there was at the time (about 2 years
ago) when no usable documentation worth speaking of was available. I am
also stuck at the moment with Twisted 0.18.0, because it runs with Python
1.5.2, and I had trouble getting Python >= 2.0 running on the all the
Unixes I had to get it running on. In the meantime, I think I've got that
under control.

If you're interested in looking at the programms I will have to ask the
company I developed the software for, but the complete program is only ca.
800 Lines and covers 4 Low Level Protocols.

I hope I have been of some help. Once people realise that what you want is
some sort of select-loop-server, then they will probably gush forth with
helpful suggestions.

Greetings,

Richard Sharp



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From bignose+hates-spam at benfinney.id.au  Thu Mar  1 16:19:07 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 02 Mar 2007 08:19:07 +1100
Subject: Question about raise and exceptions.
References: <mailman.4523.1172688540.32031.python-list@python.org>
	<snkbu25ft2hn3hrchg888afkapgrjutonn@4ax.com>
	<45e5e640$0$18215$426a74cc@news.free.fr>
	<o0jcu2hhqs13gu04vnmd8tmp3849u1pg54@4ax.com>
	<1172736883.332020.299830@a75g2000cwd.googlegroups.com>
Message-ID: <87zm6wvf04.fsf@benfinney.id.au>

"bruno.desthuilliers at gmail.com" <bruno.desthuilliers at gmail.com> writes:

> On 1 mar, 04:46, Daniel Klein <danielklei... at gmail.com> wrote:
> > Thanks for setting me straight. I had (wrongly) thought that the
> > stuff inside of () was a tuple.
>
> For the record, it's the ',' that makes the tuple.  The () are  (in
> this context) the call operator.

For the further record, in the context of a function call, the ','
isn't making a tuple. It's separating the arguments to the function.

-- 
 \        "My house is made out of balsa wood, so when I want to scare |
  `\     the neighborhood kids I lift it over my head and tell them to |
_o__)  get out of my yard or I'll throw it at them."  -- Steven Wright |
Ben Finney



From bearophileHUGS at lycos.com  Sun Mar 18 18:48:55 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 18 Mar 2007 15:48:55 -0700
Subject: where function
In-Reply-To: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
References: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
Message-ID: <1174258135.009452.192960@e1g2000hsg.googlegroups.com>

vorticitywo:
> Is there a function in Python analogous to the "where" function in
> IDL?

Python gives very elastic syntax, you can simply do:

data = [0,1,2,3,4,2,8,9]
print [pos for pos, el in enumerate(data) if el==2]

Bye,
bearophile



From nagle at animats.com  Wed Mar  7 22:14:53 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 03:14:53 GMT
Subject: Bug in python!?  persistent value of an optional parameter in
	function!
In-Reply-To: <7xfy8gqwof.fsf@ruckus.brouhaha.com>
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
Message-ID: <NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>

Paul Rubin wrote:
> "C Barr Leigh" <cpblPublic at gmail.com> writes:
> 
>>Help! Have I found a serious bug?
>>This seems like highly undesired behaviour to me. From the program
>>below, I get output:
> 
> 
> It is intentional, not a bug, see the docs.  Whether it's desirable is
> a different question.

    True.  It would make sense to disallow mutable values as
initial values for optional arguments.  The present behavior
is silly.

				John Nagle


From csselo at gmail.com  Fri Mar 30 05:30:09 2007
From: csselo at gmail.com (csselo at gmail.com)
Date: 30 Mar 2007 02:30:09 -0700
Subject: Object Oriented Database with interface for Pyhton
In-Reply-To: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
Message-ID: <1175247009.786698.72390@l77g2000hsb.googlegroups.com>

http://www.sqlalchemy.org/

you ll like it.

On 30 Mart, 12:04, "alfa... at gmail.com" <alfa... at gmail.com> wrote:
> Hello all
>
> I am looking for an object oriented database with interffaces for
> python. Either open source or commercial.
>
> I am looking for a Database not a object persistence system. I would
> like to be able to execute queries outside from the aplication. If
> posible wih OQL ( object query language )
>
> The only candidate I have now is Cache from Intersystem
>
> Thanks in advance




From magoldfish at gmail.com  Tue Mar  6 14:55:12 2007
From: magoldfish at gmail.com (Marcus)
Date: 6 Mar 2007 11:55:12 -0800
Subject: calendar (date) iterator?
Message-ID: <1173210910.945107.255850@64g2000cwx.googlegroups.com>

Hi,

I'm looking for useful starting points, suggestions, and sample code,
to implement a calendar iterator.  Simply, the iterator is seeded with
an initial calendar date, e.g., "03-12-2006", and then subsequent
calls to next return subsequent dates.  The seed could be a standard
calendar/datetime object.

> iter = calendarIterator("03-12-2006")
> print iter.next()

   03-12-2006

A useful extension would be to allow specifiation of iter intervals,
e.g.,

> iter = calendarIterator("03-12-2006 01:00:00", "minutes")
> print iter.next()

   03-12-2006 01:01:00

Thanks in advance for pointers and suggestions!



From esj at harvee.org  Fri Mar 23 21:15:56 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Fri, 23 Mar 2007 21:15:56 -0400
Subject: fine grain logging cotrol
In-Reply-To: <op.tpny4gmex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
References: <mailman.5451.1174567188.32031.python-list@python.org>	<etu19j$nqi$03$1@news.t-online.com>	<mailman.5464.1174579174.32031.python-list@python.org>	<etuvoj$pqs$03$1@news.t-online.com>	<etvvij$7h3$01$1@news.t-online.com>	<mailman.5519.1174663861.32031.python-list@python.org>	<eu12qc$1n5$00$1@news.t-online.com>
	<eu1kls$og8$1@sea.gmane.org>
	<op.tpny4gmex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <eu1u4h$ld$1@sea.gmane.org>

Gabriel Genellina wrote:

> I don't get all the details of what's all that stuff for, but from the  
> error and traceback, I think you forgot to create the filter_test  
> instance. That is, change lgr.addFilter(filter_test) to  
> lgr.addFilter(filter_test())


do'h . for some reason, I thought addFilter took a class instead of an 
instance.  but on testing, I'm still missing something and getting the 
same error



From jgodoy at gmail.com  Sun Mar 25 06:57:24 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 25 Mar 2007 07:57:24 -0300
Subject: Using remote source code
References: <1174795795.112606.21720@e65g2000hsc.googlegroups.com>
Message-ID: <87lkhloajv.fsf@gmail.com>

pyapplico at gmail.com writes:

> Is there any possible way that I can place a .py file on the internet,
> and use that source code in an .py file on my computer?

Besides Alex suggestion, you can also check Pyro. 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From xiong.xu.cn at gmail.com  Mon Mar 12 20:54:48 2007
From: xiong.xu.cn at gmail.com (imx)
Date: 12 Mar 2007 17:54:48 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173731204.621260.192000@30g2000cwc.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<mailman.4978.1173719342.32031.python-list@python.org>
	<1173728423.775330.164470@t69g2000cwt.googlegroups.com>
	<1173731204.621260.192000@30g2000cwc.googlegroups.com>
Message-ID: <1173747288.760536.60020@j27g2000cwj.googlegroups.com>

On 3?13?, ??4?26?, "Paul Boddie" <p... at boddie.org.uk> wrote:
> Goldfish wrote:
> > You can definitely create a web bot with python. It doesn't require
> > that you "drive" A real web browser.
>
> That's true, but if you want to print the page to a file, you need
> something that can reproduce the intended layout. The Pyglet library
> developers mention "XML/HTML+CSS" as something the layout engine can
> deal with, which sounds quite impressive if its support of CSS is
> comprehensive:
>
> http://pyglet.org/
>
> Paul

Thanks for all the replies.
I will check pyglet to see if it can help.

The reason I want to do simulation but not just crawling is : we have
to check many web pages' front page to see whether it conform to our
visual standard, e.g, it should put a search box on the top part of
the page. It's tedious for human work. So I want to 'crawl and save
the visual presentation of the web site automatically', and check
these image files later with human eyes.

-Xiong



From duncan.booth at invalid.invalid  Tue Mar 20 10:43:00 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 20 Mar 2007 14:43:00 GMT
Subject: How to copy a ClassObject?
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
	<Xns98F993D63F87Dmosornet@161.53.160.64>
Message-ID: <Xns98F995B5964F6duncanbooth@127.0.0.1>

Karlo Lozovina <_karlo_ at _mosor.net_> wrote:

> After this, tmp is a copy of First, and modifying tmp.name will not
> affect First.name.

As Peter said, it's not a copy, its a subclass.

Modifying tmp.name would affect First.name (although in your example it is 
immutable so you cannot modify it).
Also, rebinding First.name will change the value you see in tmp.name 
whereas rebinding tmp.name will hide the copy inherited from First.name (so 
a later del would restore it).

> If my code is somehow mistaken and might not function properly in all 
> cases, please correct me. 

Consider yourself corrected.

You could do what you are attempting with:

   tmp = new.classobj('tmp', First.__bases__, dict(First.__dict__))

which creates a new class named 'tmp' with the same base classes and a copy 
of First's __dict__ except that the __name__ attribute for the new class 
will be set to 'tmp'. The attribute values are still shared between the 
classes (which is significant only if they are mutable), but otherwise they 
won't be sharing state.

I have no idea why you would want to do this, nor even why you would want a   
'name' attribute when Python already gives you '__name__'.


From stefaan.himpe at gmail.com  Tue Mar 20 05:42:53 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 20 Mar 2007 02:42:53 -0700
Subject: XML based programming language
In-Reply-To: <etmrjs$s8m$1@nemesis.news.tpi.pl>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
	<567h7sF287idqU1@mid.uni-berlin.de>
	<1174332767.221788.252460@l77g2000hsb.googlegroups.com>
	<etmrjs$s8m$1@nemesis.news.tpi.pl>
Message-ID: <1174383773.374579.212670@y80g2000hsf.googlegroups.com>

> Don't you think the lex/yacc combo is complex even in anything in
> real-life?
If real-life means: C++, then yes, it is impossible :)
If real-life means: some domain specific language, then it is ok.

>The "XML tree simplification implementations" (as Elementtree
> can be considered) has other complex tasks to do.

I fully agree. Perhaps I need a validating parser with user-definable
hooks for semantic actions. This would be a layer on top of
Elementtree.





From thinker at branda.to  Tue Mar 13 01:06:38 2007
From: thinker at branda.to (Thinker)
Date: Tue, 13 Mar 2007 13:06:38 +0800
Subject: Starting an external, independent process from a script
In-Reply-To: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
References: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
Message-ID: <45F6315E.7030203@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Henrik Lied wrote:
> Hi there!
>
>
> So - I want to spawn a new system process. I need some good
> pointers on how to do this right.
>
> Any input? :-)
>
> Thanks a lot in advance!
>
You can try os.spawnl().
The url is http://docs.python.org/lib/os-process.html


- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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Version: GnuPG v1.4.6 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFF9jFe1LDUVnWfY8gRArO/AKDaJaHfrAluc0euEqPn/NN2J2tXsgCgye/D
ujNCylOGx3P/yC0UZc5oXHc=
=yRuY
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From rmcore at gmail.com  Tue Mar 20 01:03:43 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Tue, 20 Mar 2007 00:03:43 -0500
Subject: How to calculate a file of equations in python
In-Reply-To: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>
References: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>
Message-ID: <C373B4E3-7850-46E0-97CD-8AD9DF0AD3BC@gmail.com>


On Mar 19, 2007, at 11:48 PM, John wrote:

> Hi,
> I have a text file which contains math expression, like this
> 134
> +234
> +234
>
> (i.e. an operation (e.g. '+) and then a number and then a new line).
>
> Can you please tell me what is the easiest way to calculate that file?
> for example the above example should be = 134 + 234 + 234 = 602.
>

Easiest?

eval(' '.join(open(fileName).readlines()).replace('\n',''))




From spe.stani.be at gmail.com  Tue Mar  6 07:51:59 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 6 Mar 2007 04:51:59 -0800
Subject: SPE python IDE: Call for testers!
Message-ID: <1173185519.537841.86410@64g2000cwx.googlegroups.com>

I've been working a lot on fixing SPE and upgrading it with the latest
plugins. The winpdb debugger no longer fails and wxGlade crashes are
history. Is that not great? Are you eager to try it out yourself?
Please do! Get it from subversion and test it for any critical bug, so
I can iron it out. I have been patching a lot for Ubuntu users, who
will be very pleased with this release, and I'd like to thank Jurjen a
lot for his work on Mac issues. This is a definitely a release
everyone should upgrade to, wether you use windows, mac or linux! SPE
is both suitable for newbies and experienced python programmers.

Read more and comment here:

http://pythonide.stani.be

Thanks for your interest,

Stani



From http  Thu Mar  8 20:27:01 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 17:27:01 -0800
Subject: any better code to initalize a list of lists?
References: <esqc9r$cn09$1@netnews.upenn.edu>
Message-ID: <7xlki7dx5m.fsf@ruckus.brouhaha.com>

"John" <rds1226 at sh163.net> writes:
> For my code of radix sort, I need to initialize 256 buckets. My code looks a 
> little clumsy:
> 
> radix=[[]]
> for i in range(255):
>     radix.append([])
> 
> any better code to initalize this list? 

Typically you'd say 
   radix = [[] for i in xrange(256)]

but what are you really doing?  This plan to implement radix sorting
sounds a little bit odd, unless it's just an exercise.

You could also consider using a dictionary instead of a list,
something like:

   radix = defaultdict(list)


From kyosohma at gmail.com  Wed Mar 28 09:12:13 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 28 Mar 2007 06:12:13 -0700
Subject: looking for RSS generator
In-Reply-To: <1175049754.792928.267820@r56g2000hsd.googlegroups.com>
References: <1175041816.363323.22460@n76g2000hsh.googlegroups.com>
	<1175049754.792928.267820@r56g2000hsd.googlegroups.com>
Message-ID: <1175087533.754775.215440@b75g2000hsg.googlegroups.com>

On Mar 27, 9:42 pm, "alex23" <wuwe... at gmail.com> wrote:
> > I'm looking for sample code to generate an RSS feed.
>
> For this, I highly recommend PyRSS2Gen:http://www.dalkescientific.com/Python/PyRSS2Gen.html
>
> Very straightforward.
>
> > I can annotate
> > my html code with comments/tags to mark the articles, all I need is an
> > "engine" to process the pages and generate the rss file.
>
> If you're wanting to convert HTML to RSS, I'd recommend using
> BeautifulSoup for parsing the HTML:http://www.crummy.com/software/BeautifulSoup/
>
> Hope this helps.
>
> -alex23

Looks like there's an RSS module too:

http://www.mnot.net/python/RSS.py
http://www-128.ibm.com/developerworks/webservices/library/ws-pyth11.html

Fredrik Lundh also has some info on his site: http://effbot.org/zone/effnews-1.htm

Have fun with the snake!

Mike



From michele.petrazzoDELETE at DELETEunipex.it  Fri Mar 23 07:05:29 2007
From: michele.petrazzoDELETE at DELETEunipex.it (Michele Petrazzo)
Date: Fri, 23 Mar 2007 11:05:29 GMT
Subject: Making GIF image twice the size - in memory
In-Reply-To: <1174597468.170020.115340@e65g2000hsc.googlegroups.com>
References: <1174597468.170020.115340@e65g2000hsc.googlegroups.com>
Message-ID: <ZvOMh.35893$zG1.346500@twister2.libero.it>

Miki wrote:
> Hello All,
> 

Heelo,

> I get an image from a web page (via urlopen), and like to make it 
> twice the size.

<-cut->

> However I don't get a valid GIF image.
> 

Your code work well here!
Why you said that the string are invalid?

--code: test_image_double.py

from urllib import urlopen
import Image
from ImageFile import Parser

def double(image_data):
     image_parser = Parser()
     image_parser.feed(image_data)
     im = image_parser.close()
     new_size = tuple(map(lambda x: 2 * x, im.size))
     new = im.resize(new_size)

     return new.tostring("gif", "P"), new, new_size

url = "http://www.google.com/intl/en_ALL/images/logo.gif"
image_data = urlopen(url).read()
image_data, img, new_size = double(image_data)
img_new = Image.fromstring("P", new_size, image_data, "gif")
img_new.save("./out1.gif")
img.save("./out2.gif")
print "PIL version:", Image.VERSION

-- test

michele:~/tmp$ python test_image_double.py && file out1.gif && file out2.gif
(552, 220) 49554
PIL version: 1.1.5
out1.gif: GIF image data, version 87a, 552 x 220
out2.gif: GIF image data, version 87a, 552 x 220
michele:~/tmp$

> Any ideas?
> 

Forgot to specify that the data aren't in raw format, but to decode it
with the "gif" encoder?

> Thanks,

Ciao,
Michele


From nagle at animats.com  Wed Mar  7 23:43:03 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 04:43:03 GMT
Subject: More M2Crypto build problems
In-Reply-To: <45EF3E69.8040609@animats.com>
References: <xhFHh.5582$M65.3354@newssvr21.news.prodigy.net>
	<45EF3E69.8040609@animats.com>
Message-ID: <45EF9450.8040900@animats.com>

    Now I understand what's wrong.  It's an incompatibility between
SWIG, OpenSSL, and M2Crypto.

    OpenSSL was built with OPENSSL_NO_EC defined.  That's actually
defined via "opensslconf.h", which includes, based on whether
__i386__ is defined, the file "opensslconf-i386.h".  OpenSSL
didn't always work that way; the per-platform include file
thing is new.

    M2Crypto uses SWIG.  (Usually a mistake, but..)  SWIG takes
in various definition files, and generates about 24,000 lines of
C code.  (This is just glue code; it's not really doing much.)
One of the the definition files is "_ec.i", which has:

%include <openssl/opensslconf.h>
#if OPENSSL_VERSION_NUMBER < 0x0090800fL || defined(OPENSSL_NO_EC)
#undef OPENSSL_NO_EC
%constant OPENSSL_NO_EC = 1;
#else
%constant OPENSSL_NO_EC = 0;

%{
#include <openssl/bn.h>
... stuff to handle elliptical curve encryption

This looks reasonable.  The "%include" brings in the file for
SWIG processing.  But, under SWIG's rules, that does NOT bring
in files included from within the file being included.
(Otherwise, SWIG would generate Python interfaces for everything
in them.)

So "OPENSSL_NO_EC" is undefined, which results in compiling the
code for "EC", the elliptical curve stuff removed from Fedora
5 and 6 for patent reasons.

A workaround is to put:

#define OPENSSL_NO_EC

at the beginning of "_ec.i".  This turns off elliptical curve
crypto support.  M2Crypto will then build.

There's probably a correct way to do this, and get SWIG to properly
obtain the value from the OpenSSL include file, but I don't know
SWIG well enough to do it.

				John Nagle


From olsonas at gmail.com  Wed Mar 14 16:59:27 2007
From: olsonas at gmail.com (Drew)
Date: 14 Mar 2007 13:59:27 -0700
Subject: Converting a list to a dictionary
In-Reply-To: <1173905554.026457.34810@l75g2000hse.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
	<45f8583d$0$10407$426a34cc@news.free.fr>
	<1173904326.037621.10390@n76g2000hsh.googlegroups.com>
	<1173905016.752156.248140@n59g2000hsh.googlegroups.com>
	<1173905329.280910.24450@l75g2000hse.googlegroups.com>
	<1173905554.026457.34810@l75g2000hse.googlegroups.com>
Message-ID: <1173905967.768823.295320@n59g2000hsh.googlegroups.com>

On Mar 14, 4:52 pm, "Samuel" <knipk... at gmail.com> wrote:
> On Mar 14, 9:48 pm, "Drew" <olso... at gmail.com> wrote:
>
> > This is interesting behavior, but may not be what the original poster
> > intended.
>
> I am the original poster :).
>
> > If I understand correctly, this means that if more than one
> > object shares the same id, only one copy will be created in the dict.
> > Is this correct?
>
> Yes. Dictionaries are just hashes; you can't have the same key twice.
>
> Bye,
> -Sam

Doh! *Hangs head in shame and walks away slowly...* Thanks for you
gracious response :)



From paddy3118 at googlemail.com  Sun Mar 11 18:49:24 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 11 Mar 2007 15:49:24 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <7xy7m3tqq8.fsf@ruckus.brouhaha.com>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
Message-ID: <1173653364.059431.19990@v33g2000cwv.googlegroups.com>

On Mar 11, 9:28 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Dennis Lee Bieber <wlfr... at ix.netcom.com> writes:
>
> >    Pardon? What is "the right thing with signed zeros"... In the last
> > 30 years I've been on machines that normalize floating zero into a true
> > zero (all bits are zero: mantissa, exponent, and sign). This is the
> > first time I've even seen a variable output as a negative 0.0!
>
> Most machines these days use IEEE 754 which supports negative zero.
>
> http://en.wikipedia.org/wiki/Negative_zero

Isn't negative zero mathematically the same as zero? Isn't -0 just an
artefact of the representation of floating point numbers? Shouldn't
f(0) == f(-0) for all functions f?
I read the wikipedia article about meteorologists using -0 to denote a
negative number rounded to zero for the purposes of binning, i.e. if
you want to tally days with temperature above and below zero, but it
doesn't seem right. You should arrange for any temperature to be in
only one range and record temperatures to their determined accuracy. a
temperature of zero would only be in one bin and if a temperature is
read as -0.2 and th rounding says it should be taken as zero then it
should go in the same bin as any positive reading that is rounded to
zero.
Getting back to Python, shouldn't we strive to remove any distinction?
a zero is a zero regardless of sign and a function like atan returning
one of two different vaues for an argument of zero is actually
mathematically not a bad thing to do?

- Paddy.



From steve at holdenweb.com  Wed Mar 21 12:07:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 12:07:07 -0400
Subject: Garbage collection
In-Reply-To: <etrj61$euc$1@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>	<mailman.5394.1174484981.32031.python-list@python.org>	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>	<mailman.5398.1174490143.32031.python-list@python.org>
	<etrj61$euc$1@gemini.csx.cam.ac.uk>
Message-ID: <etrl9u$uvn$1@sea.gmane.org>

Tom Wright wrote:
> skip at pobox.com wrote:
>>     Tom> ...and then I allocate a lot of memory in another process (eg.
>>     open Tom> a load of files in the GIMP), then the computer swaps the
>>     Python
>>     Tom> process out to disk to free up the necessary space.  Python's
>>     Tom> memory use is still reported as 953 MB, even though nothing like
>>     Tom> that amount of space is needed.  From what you said above, the
>>     Tom> problem is in the underlying C libraries, but is there anything I
>>     Tom> can do to get that memory back without closing Python?
>>
>> Not really.  I suspect the unused pages of your Python process are paged
>> out, but that Python has just what it needs to keep going.
> 
> Yes, that's what's happening.
> 
>> Memory contention would be a problem if your Python process wanted to keep
>> that memory active at the same time as you were running GIMP.
> 
> True, but why does Python hang on to the memory at all?  As I understand it,
> it's keeping a big lump of memory on the int free list in order to make
> future allocations of large numbers of integers faster.  If that memory is
> about to be paged out, then surely future allocations of integers will be
> *slower*, as the system will have to:
> 
> 1) page out something to make room for the new integers
> 2) page in the relevant chunk of the int free list
> 3) zero all of this memory and do any other formatting required by Python
> 
> If Python freed (most of) the memory when it had finished with it, then all
> the system would have to do is:
> 
> 1) page out something to make room for the new integers
> 2) zero all of this memory and do any other formatting required by Python
> 
> Surely Python should free the memory if it's not been used for a certain
> amount of time (say a few seconds), as allocation times are not going to be
> the limiting factor if it's gone unused for that long.  Alternatively, it
> could mark the memory as some sort of cache, so that if it needed to be
> paged out, it would instead be de-allocated (thus saving the time taken to
> page it back in again when it's next needed)
> 
Easy to say. How do you know the memory that's not in use is in a 
contiguous block suitable for return to the operating system? I can 
pretty much guarantee it won't be. CPython doesn't use a relocating 
garbage collection scheme, so objects always stay at the same place in 
the process's virtual memory unless they have to be grown to accommodate 
additional data.
> 
>> I think the process's resident size is more important here than virtual
>> memory size (as long as you don't exhaust swap space). 
> 
> True in theory, but the computer does tend to go rather sluggish when paging
> large amounts out to disk and back.  Surely the use of virtual memory
> should be avoided where possible, as it is so slow?  This is especially
> true when the contents of the blocks paged out to disk will never be read
> again.
> 
Right. So all we have to do is identify those portions of memory that 
will never be read again and return them to the OS. That should be easy. 
Not.
> 
> I've also tested similar situations on Python under Windows XP, and it shows
> the same behaviour, so I think this is a Python and/or GCC/libc issue,
> rather than an OS issue (assuming Python for linux and Python for windows
> are both compiled with GCC).
> 
It's probably a dynamic memory issue. Of course if you'd like to provide 
a patch to switch it over to a relocating garbage collection scheme 
we'll all await it with  bated breath :)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From bdesth.quelquechose at free.quelquepart.fr  Fri Mar  2 15:08:32 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 02 Mar 2007 21:08:32 +0100
Subject: Strange method signature via COM
In-Reply-To: <45e8087b$0$765$5a6aecb4@news.aaisp.net.uk>
References: <45e8087b$0$765$5a6aecb4@news.aaisp.net.uk>
Message-ID: <45e87c5e$0$7504$426a74cc@news.free.fr>

Richard Jebb a ?crit :
> We are trying to use the API of a Win32 app which presents the API as a COM
> interface. The sample VB code for getting and setting the values of custom
> data fields on an object shows a method named Value():
> 
> getter        obj.Value("myfield")
> setter        obj.Value("myfield") = newvalue
> 
> Using Python 2.5 and PythonWin we can get data from data fields using the
> identical syntax

I have no experience with Python/COM, but IIRC, in VB (at least in VB6), 
the parens are also used for array subscript.

> 
>>>>print comp.Value("Phone1")
> 99080980
> 
> However the set value fails (unsurprisingly)
> 
> 
>>>>comp.value("Phone1") = "6876876876"
> 
> SyntaxError: can't assign to function call
> 
> Does anyone have any idea how to use Python to address this type of method
> signature? 

Have you tried inspecting your COM object in an interactive Python 
shell, using dir(), help() and the inspect module ?

And FWIW, disd you try the following syntaxes:
comp.value['Phone1'] = "xxx"
comp['Phone1'] = "xxx"

My 2 cents


From bignose+hates-spam at benfinney.id.au  Thu Mar 15 12:27:10 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Fri, 16 Mar 2007 03:27:10 +1100
Subject: Multiline code - trailing slash usage
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
Message-ID: <87bqiua2w1.fsf@benfinney.id.au>

"abcd" <codecraig at gmail.com> writes:

> When do I need to use a trailing slash to separate code over multiple
> lines.
>
> For example:
>
> x = "hello world, this is my multiline " + \
>      "string!!!!"

You can either do that, or you can use parentheses:

    x = ( "foo" +
          "bar" )

Note that you can make this read better *and* be faster, because
Python's parser will concatenate adjacent string values into a single
string value before compilation:

    x = ( "foo"
          "bar" )

Both these result in x being bound to the string value "foobar". The
second example doesn't even involve a concatenation operation at
run-time.

> x = {'name' : \
>       'bob'}

Python allows parentheses '()', brackets '[]' and braces '{}' to
enclose multi-line statements.

    x = { 'name':
          "bob" }

> Do I need to use the "\" in the above examples?  When do i need to
> use it?

I almost never use it to extend a statement; only sometimes within a
triple-quoted string. Parentheses can be used just about anywhere you
might otherwise need backslash-escaped line breaks.

-- 
 \                            "My, your, his, hers, ours, theirs, its. |
  `\                  I'm, you're, he's, she's, we're, they're, it's." |
_o__)                              -- Anonymous, alt.sysadmin.recovery |
Ben Finney



From fabiofz at gmail.com  Mon Mar 26 21:13:41 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Mon, 26 Mar 2007 22:13:41 -0300
Subject: Pydev 1.3.1 Released
Message-ID: <cfb578b20703261813t183241f2v38fc3dc493a94224@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.3.1 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

* Interactive Console: jython process can receive vmargs (configured in the
preferences page)
* Code-Completion: auto-import completions will not be brought for tokens in
the current module
* Code-Completion: auto-import inserted as last import in imports list (so,
__future__ imports will remain in the 1st position)
* Code-Analysis: Only adds unused parameters in methods that have some
statement that is not a 'pass' or string
* Fix: Find Occurrences: will not 'overlap' occurrences anymore
* Fix: Code-Analysis: deep attribute access after finding __getattr__ does
not signal unresolved import errors anymore

Release Highlights in Pydev:
----------------------------------------------

* Mylar integration: the pydev package explorer now supports mylar (packaged
as a separate feature: org.python.pydev.mylar.feature)
* Code-completion: comment completion is now the same as string completion
* Debug: Breakpoints can be set in external files
* Debug: Breakpoint annotations now show in external files
* Package Explorer: filter for import nodes created
* Fix: Package Explorer Actions: Open action does not expand children when
opening python file
* Fix: Project Explorer (WTP) integration: does not conflict with elements
from other plugins anymore (such as java projects)
* Fix: halt in new project wizard: when creating a new project from the
pydev wizard it was halting in some platforms
* Fix: ${string_prompt} in run config: now only evaluated on the actual run
* Fix: Code-Completion: jython shell was not handling
java.lang.NoClassDefFoundError correctly


What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and Jython
development -- making Eclipse a first class Python IDE -- It comes with many
goodies such as code completion, syntax highlighting, syntax analysis,
refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com
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From liuwensui at gmail.com  Tue Mar 13 17:00:29 2007
From: liuwensui at gmail.com (Wensui Liu)
Date: Tue, 13 Mar 2007 17:00:29 -0400
Subject: ANN: ActivePython 2.5.0.0 is now available
In-Reply-To: <45F701E4.4080404@activestate.com>
References: <45F701E4.4080404@activestate.com>
Message-ID: <1115a2b00703131400n1c3334cbh56ce27b4009be2bd@mail.gmail.com>

Is it free of charge?

On 3/13/07, Trent Mick <trentm at activestate.com> wrote:
> I'm happy to announce that ActivePython 2.5.0.0 is now available for download
> from:
>      http://www.activestate.com/products/activepython/
>
> This is the first release of ActivePython for Python version 2.5. Apologies
> for the long delay between core Python 2.5 and this release. The good news is
> that part of the reason for this delay was to finally get approval to include
> crypto in ActivePython, hence:
>
> Changes in this release include:
> - Full OpenSSL support (finally!)
> - Update to Python 2.5 (duh)
> - [Mac OS X] Universal build (finally!)
> - [Windows] Update to PyWin32 build 210
> - All the new standard extensions: SQLite, ctypes, ElementTree
> - [Linux] Rationalized the build names.
> - [Mac OS X] A sane uninstall script
>
> See the release notes for full details:
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/relnotes.html
>
>
> What is ActivePython?
> ---------------------
>
> ActivePython is ActiveState's binary distribution of Python. Builds for
> Windows, Mac OS X, Linux, HP-UX and AIX are made freely available.
>
> ActivePython includes the Python core and the many core extensions: zlib and
> bzip2 for data compression, the Berkeley DB (bsddb) and SQLite (sqlite3)
> database libraries, the Tix GUI widgets for Tkinter, ElementTree for XML
> processing, ctypes (on supported platforms) for low-level library access, and
> others. The Windows distribution ships with PyWin32 -- a suite of Windows
> tools developed by Mark Hammond, including bindings to the Win32 API and
> Windows COM. See this page for full details:
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/whatsincluded.html
>
> As well, ActivePython ships with a wealth of documentation for both new and
> experienced Python programmers. In addition to the core Python docs,
> ActivePython includes the "What's New in Python" series, "Dive into Python",
> the Python FAQs & HOWTOs, and the Python Enhancement Proposals (PEPs).
>
> An online version of the docs can be found here:
>      http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/welcome.html
>
> We would welcome any and all feedback to:
>      ActivePython-feedback at activestate.com.com
>
> Please file bugs against ActivePython at:
>      http://bugs.activestate.com/query.cgi?set_product=ActivePython
>
>
> On what platforms does ActivePython run?
> ----------------------------------------
>
> ActivePython includes installers for the following platforms:
>
> - AIX/PowerPC
> - HP-UX/PA-RISC
> - Linux/x86
> - Linux/x86_64: "x86_64" is also known as "AMD64"
> - Solaris/SPARC
> - Solaris/x86
> - Mac OS X
> - Windows/x64: "x64" is also known as "AMD64"
> - Windows/x86
>
>
> Extra Bits
> ----------
>
> ActivePython releases also include the following:
>
> - ActivePython25.chm: An MS compiled help collection of the full
>    ActivePython documentation set. Linux users of applications such as
>    xCHM might find this useful. This package is installed by default on
>    Windows.
>
> Extra bits are available from:
>      http://downloads.activestate.com/ActivePython/etc/
>
>
> Thanks, and enjoy!
>
> Trent, Python Tech Lead
>
> --
> Trent Mick
> trentm at activestate.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
WenSui Liu
A lousy statistician who happens to know a little programming
(http://spaces.msn.com/statcompute/blog)


From malaclypse2 at gmail.com  Thu Mar 15 11:32:28 2007
From: malaclypse2 at gmail.com (Jerry Hill)
Date: Thu, 15 Mar 2007 11:32:28 -0400
Subject: Pickle Problem
In-Reply-To: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
Message-ID: <16651e80703150832w3a9b6ef6jf89604e2dde0186e@mail.gmail.com>

On 15 Mar 2007 08:13:53 -0700, tonyr1988 <tonyr1988 at gmail.com> wrote:
> if __name__=='__main__':
>         x = DemoClass
>         x.WriteToFile

Here, you're binding the Class DemoClass to the name x.  What you
probably meant to do is create a new instance of DemoClass, and bind
that to name x, like this:

if __name__=='__main__':
         x = DemoClass()
         x.WriteToFile

When I make that change, your code appears to work fine.

-- 
Jerry


From brochu121 at gmail.com  Sat Mar 31 11:26:41 2007
From: brochu121 at gmail.com (David Brochu)
Date: Sat, 31 Mar 2007 11:26:41 -0400
Subject: os.system questions
In-Reply-To: <mailman.19327.1175348342.32030.python-list@python.org>
References: <mailman.19327.1175348342.32030.python-list@python.org>
Message-ID: <E55BD711-93A5-41CC-B1CE-D3F7FE96BFBB@gmail.com>


>
>
>
>
>
> From: "Eric Price" <soyouthinkimgonnalikethis at hotmail.com>
> Date: March 31, 2007 9:38:53 AM EDT
> To: soyouthinkimgonnalikethis at hotmail.com, khemkaamit at gmail.com
> Cc: python-list at python.org
> Subject: Re: os.system questions
>
>
> Oops! The problem isn't in the os.system call. It's in the fact  
> that I don't call the function. That is, I write a script called  
> "test.py" with a function in it called "freshReboot". Now, how do I  
> call that function from test.py? That is, how do I write a cron  
> event such that "freshReboot" actually gets called when I run test.py?
> TIA,
> Eric


 >>> Eric - to call a function that is located inside another module  
you first need to import that module into the program you are running:


from test.py import * # this would import all functions from test.py
from test.py import freshReboot # this will import freshReboot from  
test.py


to call freshReboot in your program you would simply call it by it's  
name freshReboot

ex: x = freshReboot()
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From gagsl-py2 at yahoo.com.ar  Thu Mar 15 19:25:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 20:25:08 -0300
Subject: Problem I have with a while loop/boolean/or
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
	<1173897260.531843.171330@n59g2000hsh.googlegroups.com>
Message-ID: <op.to87b6drx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 15:34:20 -0300, Fabio FZero <fabio.fzero at gmail.com>  
escribi?:

> Why don't you try this instead:
>
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
>
> while not hint in 'yn':
>     hint = raw_input("Please specify a valid choice: ")

Dangerous: what if the user types 'yn'?
`hint in list('yn')` may be better, if you don't like the previous answers.

-- 
Gabriel Genellina



From aleax at mac.com  Tue Mar 20 11:11:28 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 08:11:28 -0700
Subject: How many connections can accept a 'binded' socket?
References: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>
	<etonao$c5l$1@news2.u-psud.fr>
Message-ID: <1hv9kuv.5quf8uonylowN%aleax@mac.com>

Laurent Pointal <laurent.pointal at limsi.fr> wrote:

> billiejoex a ?crit :
> > Hi,
> > I'm writing a small asyncore-based server application serving a lot of
> > clients. When I have to handle more than 1021 client simoultaneously
> > the 'binded' socket object raises an error:
> > 
> > [...]
> > connections: 1018
> > connections: 1019
> > connections: 1020
> > connections: 1021
> > Traceback (most recent call last):
> >   File "asyncore_client.py", line 31, in <module>
> >   File "asyncore.py", line 191, in loop
> >   File "asyncore.py", line 138, in poll
> >   File "asyncore.py", line 80, in write
> >   File "asyncore.py", line 76, in write
> >   File "asyncore.py", line 395, in handle_write_event
> >   File "asyncore_client.py", line 24, in handle_connect
> >   File "asyncore_client.py", line 9, in __init__
> >   File "asyncore.py", line 257, in create_socket
> >   File "socket.py", line 156, in __init__
> > socket.error: (24, 'Too many open files')
> > 
> > I just wanna know: is there a way to know how many connections can
> > accept a 'binded' socket BEFORE getting such error? Maybe
> > socket.SOMAXCONN could help me?
> 
> Here you get out of file descriptors, I dont think SOMAXCONN would help.
> 
> Under Linux (maybe Unix), there is ulimit -n nnn to setup the maximum
> number of files descriptors. I don't know its upper limit (maybe a
> kernel compile time information).

A shell command

ulimit -Hn

should report on the hard-limit of the number of open file descriptors;
just ulimit -n should report on the current soft-limit.

If you're going to pass the fd's to select, as asyncore does by default,
a separate limit of 1024 is unfortunately likely to apply anyway; so,
once that ulimit is raised, you may want to pass argument use_poll as
true to asyncore.loop.  The performance of poll with a huge number of
sockets may however not be all that shiny.  Better mechanisms, such as
epoll or kqueue, I believe, are not available for asyncore, even if your
OS supports them; to serve thousands of open sockets with good
performance, you may need to switch to Twisted (which offers many more
implementations of the abstract Reactor interface -- you don't _have_ to
use Twisted's higher layers if you don't want to).


Alex


From lew at nospam.lewscanon.com  Sat Mar 31 11:56:57 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Sat, 31 Mar 2007 11:56:57 -0400
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <QcmPh.29531$x9.22267@edtnps89>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<Fo2Ph.12350$Um6.9109@newssvr12.news.prodigy.net>
	<460cc83a.2652073@news.readfreenews.net>
	<QcmPh.29531$x9.22267@edtnps89>
Message-ID: <RPadne6QN55UGZPbnZ2dnUVZ_hKdnZ2d@comcast.com>

Arved Sandstrom wrote:
> "Timofei Shatrov" <grue at mail.ru> wrote in message 
> news:460cc83a.2652073 at news.readfreenews.net...
>> On Fri, 30 Mar 2007 06:48:05 GMT, "Mike Schilling" 
>> <mscottschilling at hotmail.com>
>> tried to confuse everyone with this message:
>>
>>> Xah Lee wrote:
>>>
>>>> So, a simple code like this in normal languages:
>>>> becomes in Java:
>>> Only when written by someone almost entirely ignorant of Java.
>>>
>> Which is the state most people want to be in...
> 
> Which based on what I've seen, is the state that most Java programmers are 
> in. They'd have no idea why Mike said what he did.

what EVerrr!

-- Lew


From joshua at eeinternet.com  Thu Mar 29 15:07:02 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Thu, 29 Mar 2007 11:07:02 -0800
Subject: Finding a module's sub modules at runtime
References: <460ab913$0$16387$88260bb3@free.teranews.com>
	<1175112265.427331.93340@o5g2000hsb.googlegroups.com>
	<460ac66a$0$16290$88260bb3@free.teranews.com>
	<1hvqae5.1alie2515sbssfN%aleax@mac.com>
Message-ID: <460c01df$0$16410$88260bb3@free.teranews.com>

On Thursday 29 March 2007 07:33, Alex Martelli wrote:

> Joshua J. Kugler <joshua at eeinternet.com> wrote:
> 
>> still be nicely portable.  It just seems that since Python is gathering
>> that information anyway, it should make it available without me having to
>> walk the directory tree.
> 
> Sorry, where is Python "gathering that information anyway"?  Unless I'm
> mistaken, Python by default does not walk directory trees of subpackages
> -- what makes you think it does?

Hmm...right: dynamic language, runtime binding.  It would go out and find
whether or not Module1.Module2 existed only when import was called.  Sorry,
my bad.  I am assuming, however, that the help function walks the directory
tree, or else I would not get output like this:

>>> import ModTest
>>> help(ModTest)
Help on package ModTest:

NAME
    ModTest

FILE
    /usr/local/lib/python2.4/site-packages/ModTest/__init__.py

PACKAGE CONTENTS
    AModule
    BModule
    CModule

Thanks for the clarification.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From crosseyedpenguin at cox.net  Sun Mar  4 16:03:00 2007
From: crosseyedpenguin at cox.net (Roger)
Date: Sun, 04 Mar 2007 14:03:00 -0700
Subject: Alternatives for Extracting EXIF and JPEG Data from Images
Message-ID: <45EB3404.3030401@cox.net>

Does anybody have a pointer to a Python library/utility that will 
extract the chrominance and luminance quantization tables from JPG images? 

I have been using the _getexif method from PIL, which works fine, but 
doesn't extract the quantization data.  I am a bit fuzzy on the 
terminology, but the quantization data  seems to be JPEG data rather 
than EXIF data.  One utility that extracts the quantization tables is 
JPEGsnoop -- there is a link to download the utility here:
   http://www.impulseadventure.com/photo/jpeg-quantization.html

The source code for the above isn't available and may not be callable 
from a Python script even  if it were available.

Roger



From http  Tue Mar 13 18:40:24 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 14:40:24 -0800
Subject: help!! *extra* tricky web page to extract data from...
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
	<55oli1F25u2dmU1@mid.uni-berlin.de>
	<7xmz2gbx6r.fsf@ruckus.brouhaha.com>
	<55omooF25ll0vU1@mid.uni-berlin.de>
Message-ID: <7x1wjskbs7.fsf@ruckus.brouhaha.com>

"Diez B. Roggisch" <deets at nospam.web.de> writes:
> Nice idea, but not really helpful in the end. Besides the rather nasty
> parts of the DOMs that make JS programming the PITA it is, I think the
> whole event-based stuff makes this basically impossible.

Obviously the Python interface would need ways to send events into the
DOM, simulating timer ticks, mouse clicks, and so forth, just like
urllib in a sense simulates a user navigating a browser.


From mail at microcorp.co.za  Tue Mar  6 00:21:20 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 6 Mar 2007 07:21:20 +0200
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com><1172757183.819978.219440@v33g2000cwv.googlegroups.com><1172764725.827624.298180@j27g2000cwj.googlegroups.com><1172771161.015437.50000@n33g2000cwc.googlegroups.com>
	<m2lkic2f2z.fsf@cochabamba.cs.uu.nl>
Message-ID: <000201c75fbc$58b202e0$03000080@hendrik>

 "Piet van Oostrum" <p... at cs.uu.nl> wrote:

> >>>>> "Bart Ogryczak" <B.Ogryczak at gmail.com> (BO) wrote:
>
> >BO> Any system with 8-bit bytes, which would mean any system made after
> >BO> 1965. I'm not aware of any Python implementation for UNIVAC, so I
> >BO> wouldn't worry ;-)
>
> 1965? I worked with non-8-byte machines (CDC) until the beginning of the
> 80's. :=( In fact in that time the institution where Guido worked also had
such
> a machine, but Python came later.

Those behemoths were EXPENSIVE - so it made a lot of sense to keep using
them until the point that it became obvious even to an accountant that the
maintenance cost was no longer worth it...

Would actually not surprise me if there were still a few around, doing
electricity
accounts or something.

- Hendrik



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar  4 08:12:01 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 04 Mar 2007 14:12:01 +0100
Subject: transfer data from one machine to another
References: <1173013001.510046.42270@64g2000cwx.googlegroups.com>
Message-ID: <54vut0F20r3riU1@mid.individual.net>

bahoo wrote:

> I have ssh access to two linux machines (both WITHOUT root
> account), and I'd like to copy data from one to another.
> Since the directory structure is different, I want to specify in a
> script (ideally in python, because that's what I want to learn)
> what to copy over like this:
> 
> source: /home/john/folderA
> destination: /home/smith/folderB
> 
> I'm a newbie on linux and ssh networking and python, so your
> suggestions are welcome! A small working example would be
> appreciated!

On example machine 10.0.0.1, logged in as john:

scp -r ~/folderA smith at 10.0.0.2:~/folderB

It's IMHO simpler and quicker than developing the same functionality
in Python. Or is there a simple module I overlooked?

Regards,


Bj?rn

Fup2 comp.lang.python

P.S.: Please don't crosspost over hierarchies without setting
followup.

-- 
BOFH excuse #53:

Little hamster in running wheel had coronary; waiting for
replacement to be Fedexed from Wyoming



From paul at boddie.org.uk  Thu Mar 15 07:12:45 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Mar 2007 04:12:45 -0700
Subject: most complete xml package for Python?
In-Reply-To: <mailman.5089.1173890827.32031.python-list@python.org>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
Message-ID: <1173957165.515035.5650@e65g2000hsc.googlegroups.com>

On 14 Mar, 17:45, Steve Holden <s... at holdenweb.com> wrote:
>
> Although the phrase "without even checking them all out" hardly lends
> credence to the OP's assertion of Amara's superiority, and does tend to
> support a hypothesis involving some ulterior motive (or would if less
> ingenuously done).

It's an opinion being expressed, qualified with evidence to show that
it's weakly substantiated. Hardly a reason to "call FUD" or to suspect
an astroturfing campaign - FUD being one of the most readily used
terms (and consequently one of the most overused or inappropriately
used terms) when people disagree in the technology domain, anyway.

If the inquirer has it wrong, a gentle process of education is
necessary, although it should be noted that the process does involve
listening to their account of what they are trying to achieve rather
than telling them that they are stupid for using a particular tool or
other.

Paul



From jaywgraves at gmail.com  Tue Mar 27 12:12:32 2007
From: jaywgraves at gmail.com (jay graves)
Date: 27 Mar 2007 09:12:32 -0700
Subject: exit to interpreter?
In-Reply-To: <mailman.5522.1174672336.32031.python-list@python.org>
References: <mailman.5522.1174672336.32031.python-list@python.org>
Message-ID: <1175011952.239470.37310@e65g2000hsc.googlegroups.com>

On Mar 23, 12:52 pm, belinda thom <b... at cs.hmc.edu> wrote:
> be processed up the call stack. My problem is this. I'd also like it
> to handle a special string (e.g. 'quit'), in which case control
> should return to the Python command line as opposed to returning the
> string up the call stack.

Maybe you are looking for the 'code' module.

http://docs.python.org/lib/module-code.html

...
Jay Graves



From robert.kern at gmail.com  Thu Mar  8 16:26:37 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 08 Mar 2007 15:26:37 -0600
Subject: pylint: don't warn about tabs
In-Reply-To: <SGXHh.522$mh.330@trnddc05>
References: <SGXHh.522$mh.330@trnddc05>
Message-ID: <espv2e$186$1@sea.gmane.org>

Alan Isaac wrote:
> I am brand new to pylint.
> As a tab user, I want the tabs warning turned off.
> How?
> 
> Larger question:
> where is the config file format documented?

doc/features.txt
examples/pylintrc

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From steve at holdenweb.com  Wed Mar 28 04:43:55 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 28 Mar 2007 04:43:55 -0400
Subject: socket read timeout
In-Reply-To: <MukOh.12989$Ng1.10639@newsfe19.lga>
References: <U39Oh.178798$BK1.144837@newsfe13.lga>	<eub6un$k3d$3@nemesis.news.tpi.pl>	<mailman.5668.1175003334.32031.python-list@python.org>	<VegOh.15507$nh4.13055@newsfe20.lga>	<mailman.5688.1175034299.32031.python-list@python.org>
	<MukOh.12989$Ng1.10639@newsfe19.lga>
Message-ID: <eud9sd$fav$2@sea.gmane.org>

hg wrote:
> Facundo Batista wrote:
> 
>> hg wrote:
>>
>>> Do you mean use select ?
>> No, socket's timeout:
>>
>>>>> import socket
>>>>> s = socket.socket()
>>>>> s.settimeout(5)
>>>>> ...
>> Regards,
>>
>> --
>> .   Facundo
>> .
>> Blog: http://www.taniquetil.com.ar/plog/
>> PyAr: http://www.python.org/ar/
> 
> 
> My issue with that is the effect on write: I only want a timeout on read ...
> but anyway ...
> 
If you want selective timeout behaviour then yes, you should use select.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From suyuancn at gmail.com  Thu Mar 29 08:34:14 2007
From: suyuancn at gmail.com (Su Y)
Date: 29 Mar 2007 05:34:14 -0700
Subject: Weird behavior in search in a list
In-Reply-To: <mailman.5752.1175170978.32031.python-list@python.org>
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
	<mailman.5752.1175170978.32031.python-list@python.org>
Message-ID: <1175171654.336833.53450@p77g2000hsh.googlegroups.com>

On 3?29?, ??8?22?, Michael Bentley <mich... at jedimindworks.com> wrote:
> On Mar 29, 2007, at 6:51 AM, Su Y wrote:
>
>
>
>
>
> > I want find the first number in extend[] which is larger than num, so
> > I wrote:
> > def find(num):
> >     count=0
> >     for elem in extend:
> >         if elem<num:
> >             count+=1
> >     return count
>
> > I found that if extend[] is monotonous, like [1.1, 2.3, 3.2, 4.5,
> > 5.6],
> > it works fine: find(4) returns 3, extend[3] is 4.5.
> > But, if extend[] is not monotonous, like [1.1, 2.3, 3.2, 4.5, 5.6,
> > 4.6, 3.4, 2.1, 0.3],
> > find(4) returns 6, extend[6] is 3.4!
>
> > what's going on here? I really can't understand....
>
> find() loops through the list, and every time it finds a value less
> than num it increments count.  So in your second example the values
> 1.1, 2.3, 3.2,  3.4, 2.1, and 0.3 are all less than 4, which means
> count will be 6.
>
> As you learned, a sorted list behaves as you expect.  So one approach
> is to sort your list first.  But another perhaps better approach is
> to do something like:
>
> def find(num):
>         # check to make sure there *is* a value greater than num
>         if max(extend) > num:
>                 # then return the smallest value that is greater than num
>                 return min([x for x in extend if x > num])
>         else:
>                 return None
>
> Hope this helps,
> Michael

oh yes, it's the "break" I forgot... Thank you, it helps me a lot!



From paul at boddie.org.uk  Thu Mar 15 17:45:44 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 15 Mar 2007 14:45:44 -0700
Subject: most complete xml package for Python?
In-Reply-To: <55tevoF270hd4U1@mid.uni-berlin.de>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
	<1173908076.351577.75000@n59g2000hsh.googlegroups.com>
	<1173909884.822838.264030@n76g2000hsh.googlegroups.com>
	<55tevoF270hd4U1@mid.uni-berlin.de>
Message-ID: <1173995144.878694.241000@n59g2000hsh.googlegroups.com>

Diez B. Roggisch wrote:
> metaperl schrieb:
> >
> > Well, I'm not a troll. And I am now even less impressed with
> > ElementTree. It does not preserve the document but reforms it in
> > certain cases.
> >
> > <script></script>
> >
> > gets rewritten as
> >
> > <script />
> >
> > which leads to problems when embedding Dojo Rich Text Editors.
>
> Beside the fact that this is a problem of browsers (which won't help you
> much, as you have to deal with this somehow, blaming browsers alone
> isn't solving problems I'm just too aware of), I wonder: which XML
> framework _does_ preserve such tags?

I can't remember exactly how I solved this within an XML/XSLT-heavy
Java-based framework, mostly to satisfy Internet Explorer if I
remember correctly, but it does lead to some fairly inelegant hacks.
Something like this might work:

<script><![CDATA[]]></script>

I note that such things are mentioned here (the first search result
for "CDATA" when I tried):

http://www.w3schools.com/xml/xml_cdata.asp

Paul

P.S. I'm off to fix CDATA support in libxml2dom, but I'm sure lxml
supports CDATA. Not sure about Amara, though. ;-)



From nogradi at gmail.com  Fri Mar 23 18:30:00 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Fri, 23 Mar 2007 23:30:00 +0100
Subject: On text processing
Message-ID: <5f56302b0703231530k275a574gb51045fe28fe348d@mail.gmail.com>

Hi list,

I'm in a process of rewriting a bash/awk/sed script -- that grew to
big -- in python. I can rewrite it in a simple line-by-line way but
that results in ugly python code and I'm sure there is a simple
pythonic way.

The bash script processed text files of the form:

###############################
key1    value1
key2    value2
key3    value3

key4    value4
spec11  spec12   spec13   spec14
spec21  spec22   spec23   spec24
spec31  spec32   spec33   spec34

key5    value5
key6    value6

key7    value7
more11   more12   more13
more21   more22   more23

key8    value8
###################################

I guess you get the point. If a line has two entries it is a key/value
pair which should end up in a dictionary. If a key/value pair is
followed by consequtive lines with more then two entries, it is a
matrix that should end up in a list of lists (matrix) that can be
identified by the key preceeding it. The empty line after the last
line of a matrix signifies that the matrix is finished and we are back
to a key/value situation. Note that a matrix is always preceeded by a
key/value pair so that it can really be identified by the key.

Any elegant solution for this?


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar 12 18:31:07 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 12 Mar 2007 23:31:07 +0100
Subject: Interface in IronPython
In-Reply-To: <1173734174.730471.149680@j27g2000cwj.googlegroups.com>
References: <1173734174.730471.149680@j27g2000cwj.googlegroups.com>
Message-ID: <45f5cc7e$0$27190$426a74cc@news.free.fr>

edfialk a ?crit :
> Hi all, I'm pretty much totally new to IronPython and have come to the
> point that I need an interface to interact with a co-worker's code,
> but I can't seem to find any documents or discussion on syntax for
> writing an interface.
> 
> Does anyone know of a link that talks about interfaces in IronPython
> or feel like explaining one too me? :)
> 
> Any advice would be greatly appreciated.

My best advice would be to repost your question here:
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com



From skip at pobox.com  Sat Mar 24 19:40:27 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 24 Mar 2007 18:40:27 -0500
Subject: bugs.python.org has been compromised (urgent)
In-Reply-To: <Xns98FDA8A1F7E2castleamber@130.133.1.4>
References: <Xns98FDA8A1F7E2castleamber@130.133.1.4>
Message-ID: <17925.46827.975322.334362@montanaro.dyndns.org>


    John> Just got comment spam in:
    John> http:// bugs.py thon.org/file7722/order-cialis.html
    John> http:// bugs.py thon.org/file7722/order-cialis.html order cialis 
    John> http:// bugs.py thon.org/file7723/order-tramadol.html order tramadol 

Yes, we know about it and are working on solving the problem.

Thanks,

Skip


From trentm at activestate.com  Fri Mar  9 21:11:27 2007
From: trentm at activestate.com (Trent Mick)
Date: Fri, 09 Mar 2007 18:11:27 -0800
Subject: nokia s60 python code debugging with komodo
In-Reply-To: <vkecs2djm3hlmpiu77bnmgnlt959s1l40a@4ax.com>
References: <vkecs2djm3hlmpiu77bnmgnlt959s1l40a@4ax.com>
Message-ID: <45F213CF.5070801@activestate.com>

worlman385 at yahoo.com wrote:
> anyway I can setup and debug nokia s60 python in komodo ( a python IDE
> )?

Apoloies for the crazy-late reply. We tried to get Python debugging working on 
Nokia phones a while back but couldn't get far because the socket 
implementation of the Nokia Python port wasn't up to snuff.

Cheers,
Trent

-- 
Trent Mick
trentm at activestate.com


From h.b.furuseth at usit.uio.no  Fri Mar  2 06:04:33 2007
From: h.b.furuseth at usit.uio.no (Hallvard B Furuseth)
Date: Fri, 02 Mar 2007 12:04:33 +0100
Subject: class attrdict
Message-ID: <hbf.20070302nsi@bombur.uio.no>

Does this class need anything more?
Is there any risk of a lookup loop?
Seems to work...

class attrdict(dict):
    """Dict where d['foo'] also can be accessed as d.foo"""
    def __init__(self, *args, **kwargs):
        self.__dict__ = self
        dict.__init__(self, *args, **kwargs)
    def __repr__(self):
        return dict.__repr__(self).join(("attrdict(", ")"))

>>> a = attrdict([(1,2)], a=3, b=4)
>>> a
attrdict({'a': 3, 1: 2, 'b': 4})
>>> a = attrdict([(1,2)], b=3, c=4)
>>> a
attrdict({1: 2, 'c': 4, 'b': 3})
>>> a.b
3
>>> a.d = 5
>>> a['d']
5
>>> a.e
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'attrdict' object has no attribute 'e'
>>> a.__getattr__ = 'xyzzy'
>>> a.__getattribute__ = 'xyzzy'
>>> a.__setattr__ = 'xyzzy'
>>> a.__delattr__ = 'xyzzy'
>>> a.c
4
>>> a[1]
2
>>> del a.c
>>>

-- 
Hallvard


From david.bear at asu.edu  Mon Mar  5 18:13:15 2007
From: david.bear at asu.edu (David Bear)
Date: Mon, 05 Mar 2007 16:13:15 -0700
Subject: persistent fifo queue class
Message-ID: <3240528.rhEsMVbDK6@teancum>

I'm looking to see if there are any examples or prewritting fifo queue
classes. I know this is a broad topic. I'm looking to implement a simple
application where a web server enqueue and pickle using a local socket on
to a 'queue server' -- and then I will have another application dequeue the
pickles again using a local socket.

-- 
David Bear
-- let me buy your intellectual property, I want to own your thoughts --


From mensanator at aol.com  Sat Mar 10 21:08:19 2007
From: mensanator at aol.com (mensanator at aol.com)
Date: 10 Mar 2007 18:08:19 -0800
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
Message-ID: <1173578899.046177.104890@j27g2000cwj.googlegroups.com>

On Mar 10, 3:17?pm, "Frank" <super... at gmail.com> wrote:
> Hi,
>
> does anyone know how one can test if, e.g., a dictionary 'name' has a
> key called 'name_key'?
>
> This would be possible:
>
> keys_of_names = names.keys()
> L = len(keys_of_names)
>
> for i in range(L):
> if keys_of_names[i] == name_key:
> print 'found'
>
> But certainly not efficient. I would expect there is something like:
>
> name.is_key(name_key)
>
> I appreciate your help!

I often build histograms using dictionaries.

if hist.has_key(outcome):
    hist[outcome] += 1  # if key already exists, increment
else:
    hist[outcome] = 1   # else create a new key


>
> Frank




From savalon at ukr.net  Mon Mar 19 16:58:49 2007
From: savalon at ukr.net (Orin)
Date: 19 Mar 2007 13:58:49 -0700
Subject: coverage.py problem
Message-ID: <1174337929.621691.307390@p15g2000hsd.googlegroups.com>

Hi,
I have a problem in using coverage.py module in my project:

./cov -c
Traceback (most recent call last):
File "./cov", line 10, in ?
coverage.the_coverage.command_line(sys.argv[1:])
 File "/usr/lib/python2.4/site-packages/coverage.py", line 363, in
command_line    self.collect()
 File "/usr/lib/python2.4/site-packages/coverage.py", line 467, in
collect
for file in os.listdir(cache_dir):
OSError: [Errno 2] No such file or directory: ''

The make file, in which coverage.py are been used is:
................
pythonpath=..
# Targets
.PHONY: pylint build test clean coverage
pylint: test
	$(MAKE) -C .. pylint
test: build clean_coverage $(test_results) coverage
coverage:
	./cov -c
	./cov -r -m ../src*py
build:
	$(MAKE) -C ../src
clean_coverage:
	-rm .coverage*
	./cov -e
clean:
	-rm *~* $(test_results)
# Tests
%.pass :: %.py $(srcs)
	-rm $@
	PYTHONPATH=$(pythonpath) DJANGO_SETTINGS_MODULE=$(settings) ./cov -x -
p $< && touch $@
...................
If anybody knows what can be the reason of this error, please tell me

With best regards, Orin



From dudaraster at gmail.com  Sun Mar  4 06:51:09 2007
From: dudaraster at gmail.com (Aviroce)
Date: Sun, 04 Mar 2007 11:51:09 +0000
Subject: *** CANADIAN ANTI-TERROR LAW HAS BEEN STRUCK DOWN BY ITS
	HONORABLE SUPREME COURT UNANIMOUSLY *** (REPOST)
In-Reply-To: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
References: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
Message-ID: <repost.92103.1172691920.663009.111260@j27g2000cwj.googlegroups.com>

On Feb 24, 11:22 am, stj... at rock.com wrote:
> Canada anti-terror law is struck down>From the Associated Press
>
> February 24, 2007
>
> OTTAWA - Canada's Supreme Court on Friday unanimously declared it
> unconstitutional to detain foreign terrorism suspects indefinitely
> while the courts review their deportation orders.
>
> Five Arab Muslim men have been held for years under the "security
> certificate" program, which the Justice Department has said is a key
> tool in the fight against global terrorism and essential to Canada's
> security.
>
> The court found that the system violated the Charter of Rights and
> Freedoms, Canada's bill of rights. However, it suspended its ruling
> for a year to give Parliament time to rewrite the part of the
> Immigration and Refugee Protection Act that covers the certificate
> process.
>
> The security certificates were challenged by three men from Morocco,
> Syria and Algeria - all alleged by the Canadian Security Intelligence
> Service to have ties to terrorist networks.
>
> The men have spent years in jail while fighting deportation orders.
>
> They risk being labeled terrorists and sent back to their native
> countries, where they say they could face torture.
>
> The court said the treatment of the suspects was a violation of their
> rights.
>
> "The overarching principle of fundamental justice that applies here is
> this: Before the state can detain people for significant periods of
> time, it must accord them a fair judicial process," Chief Justice
> Beverley McLachlin wrote in a ruling for all nine justices.
>
> "The secrecy required by the scheme denies the person named in a
> certificate the opportunity to know the case put against him or her,
> and hence to challenge the government's case," she said.
>
> The challenged law allows sensitive intelligence to be heard behind
> closed doors by a federal judge, with only sketchy summaries given to
> defense attorneys.
>
> The court said the men and their lawyers should have a right to
> respond to the evidence used against them by intelligence agents.
>
> Stockwell Day, the minister of public safety, noted that because the
> ruling does not take effect for a year, the certificates would remain
> in place. He said the government would address the court's ruling "in
> a timely and decisive fashion."
>
> Two of the men are out on bail and remain under house arrest. Three
> others are being held in a federal facility in Ontario.

<<<<<<<<<<<"The court said the treatment of the suspects was a
violation of their
rights.


"The overarching principle of fundamental justice that applies here
is
this: Before the state can detain people for significant periods of
time, it must accord them a fair judicial process," Chief Justice
Beverley McLachlin wrote in a ruling for all nine justices.


"The secrecy required by the scheme denies the person named in a
certificate the opportunity to know the case put against him or her,
and hence to challenge the government's case," she said.
">>>>>>>>>>>>>>>>

THAT IS CALLED PROTECTING CIVIL RIGHTS.  IN THE UNITED STATES OF
AMERICA, WHERE CIVIL RIGHTS ARE PROTECTED BY LAW, FOREIGN SUSPECTS ARE
NOT PROTECTED BY THE GENEVA CONVENTION.  DR. EVIL, V.P. CHENEY, AND
MINI-ME, PRESIDENT BUSH, OPTED TO MODIFY THE GENEVA CONVENTION TO DENY
FOREIGN SUSPECTS DUE PROCESS DEMANDED BY THE CONVENTION.  THIS MEANS
ENEMIES OF THE UNITED STATES OF AMERICA WILL BE DOING JUST THAT TOO.
WHAT IS GOOD FOR THE GOOSE IS GOOD FOR GANDER.








From jzgoda at o2.usun.pl  Mon Mar 19 16:21:29 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Mon, 19 Mar 2007 21:21:29 +0100
Subject: XML based programming language
In-Reply-To: <1174332767.221788.252460@l77g2000hsb.googlegroups.com>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
	<5655asF26decfU1@mid.uni-berlin.de>
	<1174298711.440674.114510@o5g2000hsb.googlegroups.com>
	<56786fF2743atU2@mid.uni-berlin.de>
	<1174307748.936567.191440@e1g2000hsg.googlegroups.com>
	<567h7sF287idqU1@mid.uni-berlin.de>
	<1174332767.221788.252460@l77g2000hsb.googlegroups.com>
Message-ID: <etmrjs$s8m$1@nemesis.news.tpi.pl>

stefaan napisa?(a):

> No schema checker can take this specification and simply output "22".
> XSLT might be able to implement it, but it is complex for anything
> real-life. Elementtree can immediately give me the concrete syntax
> tree,
> but any semantic actions have to be implemented during a
> manually programmed tree traversal.

Don't you think the lex/yacc combo is complex even in anything in
real-life? The "XML tree simplification implementations" (as Elementtree
can be considered) has other complex tasks to do. Usually implementors
look from document processing perspective and the interface is tailored
to such tasks. ;)

-- 
Jarek Zgoda
http://jpa.berlios.de/


From adam at atlas.st  Tue Mar 27 02:37:57 2007
From: adam at atlas.st (Adam Atlas)
Date: 26 Mar 2007 23:37:57 -0700
Subject: Python C extension providing... Python's own API?
In-Reply-To: <1174963301.590013.167030@r56g2000hsd.googlegroups.com>
References: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>
	<1174942538.061137.93130@r56g2000hsd.googlegroups.com>
	<1174957359.286188.178330@y66g2000hsf.googlegroups.com>
	<1174963301.590013.167030@r56g2000hsd.googlegroups.com>
Message-ID: <1174977477.332544.166930@n59g2000hsh.googlegroups.com>

Wow! I'll have to read through that tomorrow when I'm (hopefully) less
tired. :D

Anyway, I somehow already managed to get this working. I'm calling it
DoublePy.
Here's the alpha or proof-of-concept or whatever we're to call it.
http://adamatlas.org/2007/03/doublepy-0.1.tar.gz

Not bad for an 0.1 written in a couple of hours, methinks. This could
have some really interesting possibilities when it's more mature.



From mark at agtechnical.co.uk  Sun Mar 25 18:44:17 2007
From: mark at agtechnical.co.uk (mark at agtechnical.co.uk)
Date: 25 Mar 2007 15:44:17 -0700
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
In-Reply-To: <874po95hz5.fsf@gmail.com>
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
	<874po95hz5.fsf@gmail.com>
Message-ID: <1174862657.151504.136350@b75g2000hsg.googlegroups.com>

Great, thanks so much for posting that. It's worked a treat and I'm
getting HTML files with the list of h2 tags I was looking for. Here's
the code just to share, what a relief :)   :
...............................
from BeautifulSoup import BeautifulSoup
import re

page = open("soup_test/tomatoandcream.html", 'r')
soup = BeautifulSoup(page)

myTagSearch = str(soup.findAll('h2'))

myFile = open('Soup_Results.html', 'w')
myFile.write(myTagSearch)
myFile.close()

del myTagSearch
...............................

I do have two other small queries that I wonder if anyone can help
with.

Firstly, I'm getting the following character: "[" at the start, "]" at
the end of the code. Along with "," in between each tag line listing.
This seems like normal behaviour but I can't find the way to strip
them out.

There's an example of stripping comments and I understand the example,
but what's the *reference* to the above '[', ']' and ',' elements?
for the comma I tried:
   soup.find(text=",").replaceWith("")

but that throws this error:
   AttributeError: 'NoneType' object has no attribute 'replaceWith'

Again working with the 'Removing Elements' example I tried:
   soup = BeautifulSoup("you are a banana, banana, banana")
   a = str(",")
   comments = soup.findAll(text=",")
   [",".extract() for "," in comments]
But if I'm doing 'import beautifulSoup' this give me a "soup =
BeautifulSoup("you are a banana, banana, banana")
TypeError: 'module' object is not callable" error, "import
beautifulSoup from BeautifulSoup" does nothing

Secondly, in the above working code that is just pulling the h2 tags -
how the blazes do I 'prettify' before writing to the file?

Thanks in advance!

Mark.

..................

On Mar 25, 6:51 pm, Jorge Godoy <jgo... at gmail.com> wrote:
> m... at agtechnical.co.uk writes:
> > Hi All,
>
> > Apologies for the newbie question but I've searched and tried all
> > sorts for a few days and I'm pulling my hair out ;[
>
> > I have a 'reference' HTML file and a 'test' HTML file from which I
> > need to pull 10 strings, all of which are contained within <h2> tags,
> > e.g.:
> > <h2 class=r><a href="http://www.someplace.com/">Go Someplace</a></h2>
>
> > Once I've found the 10 I'd like to write them to another 'results'
> > html file. Perhaps a 'reference results' and a 'test results' file.
> >>From where I would then like to 'diff' the results to see if they
> > match.
>
> > Here's the rub: I cannot find a way to pull those 10 strings so I can
> > save them to the results pages.
> > Can anyone please suggest how this can be done?
>
> > I've tried allsorts but I've been learning Python for 1 week and just
> > don't know enough to mod example scripts it seems. don't even get me
> > started on python docs.. ayaa ;] Please feel free to teach me to suck
> > eggs because it's all new to me :)
>
> > Thanks in advance,
>
> > Mark.
>
> Take a look at BeautifulSoup.  It is easy to use and works well with some
> malformed HTML that you might find ahead.
>
> --
> Jorge Godoy      <jgo... at gmail.com>- Hide quoted text -
>
> - Show quoted text -




From beliavsky at aol.com  Mon Mar 26 19:28:57 2007
From: beliavsky at aol.com (Beliavsky)
Date: 26 Mar 2007 16:28:57 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
Message-ID: <1174951737.418328.313630@y66g2000hsf.googlegroups.com>

On Mar 26, 9:06 am, stef <s.mien... at id.umcn.nl> wrote:

> As said by others, "Portability, scalability & RAD" as an advantage of
> Python are probably far more important.

All of those claimed advantages can be debated, although they may
exist for some tasks.

(1) Portability. Fortran has been run on hundreds if not thousands of
platforms since 1957. People who value portability often want
assurance that their code will be supported by compilers/interpreters
produced in the future. Standard-conforming Fortran 95 code is
conforming Fortran 2003 code, and the standards committee has decided
not to remove features in future versions. Python 3 is still somewhat
up in the air, and it will NOT be backward compatible with Python 2.x,
although migration tools will be provided.

(2) Scalability. If talking about parallel computing, the widely used
OpenMP Application Program Interface (API) supports multi-platform
shared-memory parallel programming only in C/C++ and Fortran. In
general, high performance computing is done in C, C++, and Fortran.

(3) RAD. Scripting programs WILL be faster to write in Python, because
of duck typing, the many built-in data structures, and other features.
For larger programs, a Fortran (or C++ or Java) compiler will catch
some errors at compile time that are caught only at run time in
Python, perhaps after considerable time has elapsed. Furthermore, the
higher speed of Fortran may mean that the time between program runs is
1 minute vs. 10 minutes in the corresponding Python program. This can
speed the development cycle.




From jordan.taylor2 at gmail.com  Thu Mar  8 12:50:57 2007
From: jordan.taylor2 at gmail.com (Jordan)
Date: 8 Mar 2007 09:50:57 -0800
Subject: Reading a portion of a file
In-Reply-To: <1173375977.853461.68240@v33g2000cwv.googlegroups.com>
References: <1173370347.799134.119100@v33g2000cwv.googlegroups.com>
	<1173372768.823896.32710@n33g2000cwc.googlegroups.com>
	<1173375977.853461.68240@v33g2000cwv.googlegroups.com>
Message-ID: <1173376256.933492.71410@c51g2000cwc.googlegroups.com>

On Mar 8, 12:46 pm, "Jordan" <jordan.tayl... at gmail.com> wrote:
> On Mar 8, 11:52 am, "Rune Strand" <rune.str... at gmail.com> wrote:
>
>
>
> > On Mar 8, 5:12 pm, cmfvulcan... at gmail.com wrote:
>
> > > I am using a script with a single file containing all data in multiple
> > > sections. Each section begins with "#VS:CMD:command:START" and ends
> > > with "#VS:CMD:command:STOP". There is a blank line in between each
> > > section. I'm looking for the best way to grab one section at a time.
> > > Will I have to read the entire file to a string and parse it further
> > > or is it possible to grab the section directly when doing a read? I'm
> > > guessing regex is the best possible way. Any help is greatly
> > > appreciated.
>
> > Seems like something along these line will do:
>
> > _file_ = "filepart.txt"
>
> > begin_tag = '#VS:CMD:command:START'
> > end_tag = '#VS:CMD:command:STOP'
>
> > sections = []
> > new_section = []
> > for line in open(_file_):
> >     line = line.strip()
> >     if begin_tag in line:
> >         new_section = []
> >     elif end_tag in line:
> >         sections.append(new_section)
> >     else:
> >         if line: new_section.append(line)
>
> > for s in sections: print s
>
> > If your want more control, perhaps flagging "inside_section",
> > "outside_section" is an idea.
>
> You probably don't want to use regex for something this simple; it's
> likely to make things even more complicated.  Is there a space between
> the begin_tag and the first word of a section (same question with the
> end_tag)?

Sent the post too soon.  What is the endline character for the file
type?  What type of file is it?    An example section would be nice
too.  Cheers.



From carsten at uniqsys.com  Fri Mar  9 10:42:48 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 09 Mar 2007 10:42:48 -0500
Subject: number generator
In-Reply-To: <1173453432.893222.308610@j27g2000cwj.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
Message-ID: <1173454968.3450.25.camel@dot.uniqsys.com>

On Fri, 2007-03-09 at 07:17 -0800, cesco wrote:
> On Mar 9, 3:51 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> > "cesco" <fd.calabr... at gmail.com> writes:
> > > I have to generate a list of N random numbers (integer) whose sum is
> > > equal to M. If, for example, I have to generate 5 random numbers whose
> > > sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> > > simple pattern or function in Python to accomplish that?
> >
> > Erm, yes, lots of ways, there are probably further constraints on the
> > problem, such as the size of the integers, how the lists are supposed
> > to be distributed, etc.  Can you be more specific?  Is this for an
> > application?  If it's a homework problem, that's fine, but it's better
> > in that case for respondents to suggest hints rather than full solutions.
> 
> Given two positive integers, N and M with N < M, I have to generate N
> positive integers such that sum(N)=M. No more constraints.

Paul still had a point, since the word "positive" is a vital piece of
information that never appeared in your original description.

-Carsten




From theemails at gmail.com  Tue Mar 27 12:56:14 2007
From: theemails at gmail.com (Brian Erhard)
Date: 27 Mar 2007 09:56:14 -0700
Subject: Auto execute python in USB flash disk
Message-ID: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>

I am still fairly new to python and wanted to attempt a home made
password protection program.  There are files that I carry on a USB
flash drive that I would like to password protect.  Essentially, I
would like to password protect an entire directory of files.  Is there
a way to auto execute a python script after a user double clicks to
open a folder on the USB drive? How can you capture that double click
event on a specific folder?

Thanks.



From rdm at rcblue.com  Tue Mar 13 22:29:43 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 13 Mar 2007 19:29:43 -0700
Subject: number generator
Message-ID: <20070314023001.CA1821E4008@bag.python.org>

At 06:20 PM 3/13/2007, Paul Rubin wrote:
>Dick Moores <rdm at rcblue.com> writes:
> > I understand what zip() and random.sample() are doing, and the above
> > helps me get inside the fencepost method, but I don't understand WHY
> > it works, or how in the world anyone could have devised it. It is
> > truly magical to me!
>
>It's Gerald Flanagan's telegraph pole method that you quoted (I
>misremembered it as "fencepost"):
>
>     "Suppose you have a fixed telegraph pole at N and a fixed telegraph
>     pole at M, and you're given 5 more telegraph poles..." (Gerard Flanagan),
>
>Consider this diagram for the numbers from 1 to 50:
>
>   |--------------------------------------------------|
>
>The vertical bar at the left represents 0 and the vertical bar
>at the right represents 51.  The fifty dashes represent 1,2,3...50.
>You can also view the fifty dashes as a line segment of length 50.
>
>The fencepost method is to simply chop the line segment into smaller
>pieces.  You do that by choosing some random points inside the segment:
>
>     >>> import random
>     >>> random.sample(xrange(1,50), 4)
>     [49, 37, 22, 5]
>
>so mark those points with plus signs (let's see if I got this right)
>and label the points from left to right, calling them p0,p1,p2,p3:
>
>     |----+----------------+--------------+-----------+-|
>          p0               p1             p2          p3
>
>So the length of the leftmost small segment is p0-0, the length of the
>second segment is p1-p0, the third is p2-p1, the fourth is p3-p2, and
>the fifth is 50-p3.  So those lengths are the numbers you want.
>
>The zip thing was just a way to avoid using messy subscripts to
>compute the lengths.  Another way to do it is (untested):
>
>    t2 = [0] + t + [50]
>    lst = [(t2[i] - t2[i-1]) for i in xrange(1, len(t2))]

Works fine!

>I'm not sure which is better from a Python stylistic perspective.

I'm not sure, but I think if you had written it this way at first, I 
would have understood it.  But I'm glad to have learned the zip way!

>Using zip that way is fairly natural in Haskell, which I've been
>fooling around with lately.  All you're doing is subtracting adjacent
>elements by making two versions of the list, one of them shifted over
>one place, then subtracting element by element, instead of jumping
>around inside a single list, with more ways to make off-by-one errors.
>It looked more symmetrical in the Python code so I did it that way.

Thank you, thank you! You've made it very clear up to this point. 
I'll worry about the Haskell approach later, much later. ;)

Dick Moores

>FWIW, the actual Haskell approach would translate to something more like:
>
>    from itertools import chain, izip
>    lst = [(j-i) for i,j in izip(chain([0],t), chain(t,[50]))]
>
>which avoids making the intermediate zipped list.




From laurent.pointal at limsi.fr  Thu Mar  8 08:43:54 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 08 Mar 2007 14:43:54 +0100
Subject: Generator expression parenthesis mixed with function call ones
In-Reply-To: <mailman.4769.1173302266.32031.python-list@python.org>
References: <esmn5q$5ni$1@news2.u-psud.fr>	<mailman.4757.1173284624.32031.python-list@python.org>	<45ef01c7$0$5085$ba4acef3@news.orange.fr>
	<mailman.4769.1173302266.32031.python-list@python.org>
Message-ID: <esp3u6$hbi$1@news2.u-psud.fr>

Gabriel Genellina a ?crit :
> If you want to review the original discussion on how to spell a
> generator expression (called "accumulator display" by that time) see
> http://mail.python.org/pipermail/python-dev/2003-October/038868.html

That's a long discussion... and it seem I'm not alone to dislike parens
confusion.

http://mail.python.org/pipermail/python-dev/2003-October/038906.html

Thanks for the pointer.

Laurent.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 12 11:37:42 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 12 Mar 2007 16:37:42 +0100
Subject: Python in a desktop environment
In-Reply-To: <12vas8rhv0ji28d@corp.supernews.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
Message-ID: <45f573c4$0$27462$426a34cc@news.free.fr>

Grant Edwards a ?crit :
(snip)

> 
> Python is _far_ more robust than C++.
> 

I wouldn't say so - robustness is a quality of a program, not of a 
language !-)


From deets at nospam.web.de  Fri Mar 16 13:12:43 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 16 Mar 2007 18:12:43 +0100
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<T9AKh.13297$tD2.11703@newsread1.news.pas.earthlink.net>
Message-ID: <5601gbF26bm07U1@mid.uni-berlin.de>

Dennis Lee Bieber wrote:

> On 16 Mar 2007 04:41:38 -0700, "Gerald" <gerald607 at gmail.com> declaimed
> the following in comp.lang.python:
> 
>> Hi ,Im a BSc4 Maths/Computer Science student.Unfortunately my
>> curriculum did not include Python programming yet I see many vacancies
>> for Python developers.I studied programming Pascal,C++ and Delphi.So I
> 
> <blink><blink>
> 
> Pardon my surprise, but what school only covers simple Pascal,
> Object Pascal (in the guise of Delphi), and C++ without at least
> introducing other languages. Three fairly similar languages (with the
> same similar flaws -- like needing to remember to put begin/end ({})
> around multi-line blocks...

Nowadays, you can get through CS graduate studies with only Java. Sad, but
true.

Diez


From tismer at stackless.com  Wed Mar 28 17:51:56 2007
From: tismer at stackless.com (Christian Tismer)
Date: Wed, 28 Mar 2007 23:51:56 +0200
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <euenc1$fks$1@nemesis.news.tpi.pl>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<euenc1$fks$1@nemesis.news.tpi.pl>
Message-ID: <D78AD813-12F4-49D2-81B3-157681FEC6A4@stackless.com>


On 28.03.2007, at 23:36, Jarek Zgoda wrote:

> Carl Friedrich Bolz napisa?(a):
>
>> Welcome to the PyPy 1.0 release - a milestone integrating the results
>> of four years of research, engineering, management and sprinting
>> efforts, concluding the 28 months phase of EU co-funding!
>
> So it took 4 yars of work and over 2 yaers of consumption of EU funds,
> yeah, great.
>
> Could anybody explain, what this gives to Python and its users? Would
> we, eventually, get GIL-free VM, that is capable to consume all
> available power of multicore processors? Or, maybe, we'll get  
> something
> special, I am unable to dream of? Or is it purely academic project to
> create Python VM in Python?

It will eventually give you a GIL-free VM, and it already gives you
a lot more than you have dreamt of.

There is one feature missing that is probably hard to add.
Handling the 'posters who are not willing to read before they post'  
syndrome.

cheers - chris



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 07:10:02 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 13:10:02 +0200
Subject: Other classes in a module
In-Reply-To: <mailman.5584.1174840270.32031.python-list@python.org>
References: <46068EEF.6070000@adm.umu.se>
	<mailman.5584.1174840270.32031.python-list@python.org>
Message-ID: <4607aa09$0$23165$426a74cc@news.free.fr>

Daniel Nogradi a ?crit :
>> Can an instance of a class in a module, in any simple way find out which
>> other classes that exists in said module ?
> 
> 
> ##### module x ##########
> class c1:
>    pass
> 
> class c2:
>    pass
> #######################
> 
> 
> Python 2.5 (r25:51908, Nov  1 2006, 11:42:37)
> [GCC 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import types
>>>> import x
>>>> for i in dir(x):
> ...     if type(getattr(x,i)) is types.ClassType:
> ...             print "Hey, '%s' is a class!" % i
> ...
> Hey, 'c1' is a class!
> Hey, 'c2' is a class!
>>>>
> 
> 
> It might be not exactly what you want but maybe still helps.

Doesn't work with new-style classes:

 >>> class Foo(object): pass
...
 >>> import typs
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
ImportError: No module named typs
 >>> import types
 >>> type(Foo) is types.ClassType
False
 >>>


From sjmachin at lexicon.net  Thu Mar  1 11:18:12 2007
From: sjmachin at lexicon.net (John Machin)
Date: 1 Mar 2007 08:18:12 -0800
Subject: finding out the precision of floats
In-Reply-To: <1172745203.824496.208840@h3g2000cwc.googlegroups.com>
References: <1172401072.607179.241290@q2g2000cwa.googlegroups.com>
	<1172402444.935723.192200@m58g2000cwm.googlegroups.com>
	<1172405198.187516.276310@h3g2000cwc.googlegroups.com>
	<1172410271.154309.49700@j27g2000cwj.googlegroups.com>
	<1172412661.998318.109180@s48g2000cws.googlegroups.com>
	<mailman.4453.1172579820.32031.python-list@python.org>
	<1172585380.631673.257410@q2g2000cwa.googlegroups.com>
	<1172602729.777210.23070@a75g2000cwd.googlegroups.com>
	<1172662682.590738.301630@k78g2000cwa.googlegroups.com>
	<1172674419.411077.4210@t69g2000cwt.googlegroups.com>
	<1172683149.885750.323640@j27g2000cwj.googlegroups.com>
	<1172698199.219016.57710@v33g2000cwv.googlegroups.com>
	<1172745203.824496.208840@h3g2000cwc.googlegroups.com>
Message-ID: <1172765892.645783.125420@h3g2000cwc.googlegroups.com>

On Mar 1, 9:33 pm, "Bart Ogryczak" <B.Ogryc... at gmail.com> wrote:
> On Feb 28, 10:29 pm, "John Machin" <sjmac... at lexicon.net> wrote:
>
>
>
> > On Mar 1, 4:19 am, "BartOgryczak" <B.Ogryc... at gmail.com> wrote:
>
> > > On Feb 28, 3:53 pm, "John Machin" <sjmac... at lexicon.net> wrote:
>
> > > > On Feb 28, 10:38 pm, "BartOgryczak" <B.Ogryc... at gmail.com> wrote:
>
> > > > > [1] eg. consider calculating interests rate, which often is defined as
> > > > > math.pow(anualRate,days/365.0).
>
> > > > More importantly, the formula you give is dead wrong. The correct
> > > > formula for converting an annual rate of interest to the rate of
> > > > interest to be used for n days (on the basis of 365 days per year) is:
>
> > > > (1 + annual_rate) ** (n / 365.0) - 1.0
> > > > or
> > > > math.pow(1 + annual_rate, n / 365.0) - 1.0
> > > > if you prefer.
>
> > > YPB? Anyone with half a brain knows, that you can either express rate
> > > as 0.07 and do all those ridiculous conversions above, or express it
> > > as 1.07 and apply it directly.
>
> > A conversion involving an exponentiation is necessary. "All those"?? I
> > see only two.
>
> > Please re-read your original post, and note that there are *TWO* plus-
> > or-minus 1.0 differences between your formula and mine. For an annual
> > rate of 10%, yours would calculate the rate for 6 months (expressed as
> > 182.5 days) as:
> > math.pow(0.10, 0.5) = 0.316... i.e. 31.6%
>
> You're assuming that I'd store annual rate as 0.1, while actually it'd
> stored as 1.1.
> Which is logical and applicable directly.

Storing 1.1 and using it in calculations may save you a few
microseconds a day in your real-time apps. However the annual rate of
interest is 10% aka 0.1; naming 1.1 as "anualRate" (sic) is utterly
ludicrous.



From ckkart at hoc.net  Tue Mar 27 01:26:48 2007
From: ckkart at hoc.net (Christian)
Date: Tue, 27 Mar 2007 14:26:48 +0900
Subject: build python on Celeron D
In-Reply-To: <1174972091.173999.9650@n59g2000hsh.googlegroups.com>
References: <mailman.5650.1174965907.32031.python-list@python.org>
	<1174972091.173999.9650@n59g2000hsh.googlegroups.com>
Message-ID: <eua9u1$lcj$1@sea.gmane.org>

Chris Lasher wrote:
> On Mar 26, 10:48 pm, Christian <ckk... at hoc.net> wrote:
>> Traceback (most recent call last):
>>   File "setup.py", line 89, in ?
>>     setup_package()
>>   File "setup.py", line 59, in setup_package
>>     from numpy.distutils.core import setup
>>   File "/mnt/home/ck/prog/scipy/numpy-1.0.1/numpy/__init__.py", line 36, in ?
>>   File "numpy/core/__init__.py", line 5, in ?
>>     import multiarray
>> ImportError:
>> /media/hda6/home/ck/prog/scipy/numpy-1.0.1/numpy/core/multiarray.so: undefined
>> symbol: Py_InitModule4
>>
>> which is related to 32<->64 issues, right?
> 
> <http://www.thescripts.com/forum/thread35987.html>
> 
> Do you have more than one Python installation on this machine? The
> link above indicates that if you build NumPy with a different build of
> Python than you will run it from, you will get this same error.

Yes, but I took care to not confuse them.

> Granted, I'm sure there are many ways to get said error, but that was
> the most obvious from a five minute search.

I found that:

"To prevent loading extension modules that assume a 32-bit size type into an
interpreter that has a 64-bit size type, Py_InitModule4 is renamed to
Py_InitModule4_64." (http://www.python.org/dev/peps/pep-0353/)

So as numpy's setup.py cannot call 'Py_InitModule4' this means, that the
interpreter is built for 64bit systems. Maybe numpy is more accurate in testing
wether it run's on 64 or on 32 bit than the python build script itself and
therefore expect's Py_InitModule4 to be present.

Isn't there perhaps a configure option to force 32 bit?

Christian



From tinaweb at bestemselv.com  Tue Mar 20 02:56:00 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Tue, 20 Mar 2007 07:56:00 +0100
Subject: difference between urllib2.urlopen and firefox view 'page source'?
In-Reply-To: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
References: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
Message-ID: <buednSaHH4EdGGLYRVnzvA@telenor.com>

cjl wrote:
> Hi.
> 
> I am trying to screen scrape some stock data from yahoo, so I am
> trying to use urllib2 to retrieve the html and beautiful soup for the
> parsing.
> 
> Maybe (most likely) I am doing something wrong, but when I use
> urllib2.urlopen to fetch a page, and when I view 'page source' of the
> exact same URL in firefox, I am seeing slight differences in the raw
> html.
> 
> Do I need to set a browser agent so yahoo thinks urllib2 is firefox?
> Is yahoo detecting that urllib2 doesn't process javascript, and
> passing different data?
> 
> -cjl
> 
Unless the data you you need depends on the site detecting a specific 
browser you will probably receive a 'cleaner' code that's more easily 
parsed if you don't set a user agent. Usually the browser optimization 
they do is just eye candy, bells and whistles anyway in order to give 
you a more 'pleasing experience'. I doubt that your program will care 
about that ;)

Tina


From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 10 18:53:03 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 11 Mar 2007 10:53:03 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<DThIh.10892$tD2.3813@newsread1.news.pas.earthlink.net>
	<pan.2007.03.10.13.45.29.402878@REMOVE.THIS.cybersource.com.au>
	<7xr6rxkqp6.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.10.23.53.01.619207@REMOVE.THIS.cybersource.com.au>

On Sat, 10 Mar 2007 08:29:09 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>> Doesn't mean that it isn't random. After all, the first four numbers are
>> random, therefore their sum is random. 50 - (something random) is also
>> random.
> 
> What does it mean for the first 4 numbers to be random?  For example,
> is 27 random?

In isolation, no, but 27 could have been chosen at random and hence would
have been unpredictable. That was my point: if we generate four
unpredictable numbers (using random.randint or similar) and sum them, the
sum is also unpredictable, and hence the difference between 50 and that
sum is unpredictable.


> By your method, what is the probability of the first number being
> higher than 30?  What is the probability of the fifth number being
> higher than 30?  If these probabilities are unequal, can we really say
> the sequences are random?

Of course we can! "Uniform probability distribution" is a special case of
random. Most random quantities are far from uniform. The Python random
module includes a couple of non-uniform distributions, including
exponential distribution (random.expovariate) and the famous bell curve
distribution (random.normalvariate).

One common distribution which seems to have been missed is the Poisson
distribution, which applies to (among many, many others) the number of
18th Century Prussian cavalry officers who fell off their horse and broke
a limb, and the number of cars arriving at a petrol station in any hour.



-- 
Steven.



From gagsl-py2 at yahoo.com.ar  Sun Mar 25 15:53:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 16:53:55 -0300
Subject: Interactive session, alternating prompt. readline? curses?
References: <20070325170409.GA2313@dotmpe.com>
Message-ID: <op.tprf75k3x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 14:04:09 -0300, Berend van Berkum <berend at dotmpe.com>  
escribi?:

> I'm looking at building an interactive session in front of some
> rdfobj instances. I've used cmd and just found code.Interactive*.
>
> However, my question, can I change the "prompt" string in respond
> to user input using readline? AFAIK I'll need curses to do this?
> And colored prompts?

I've never used code.Interactive* and it looks like it interprets Python  
code, not arbitrary code.
Using cmd, you can set the prompt attribute. For colors, I think you may  
need curses or ncurses or similar...

-- 
Gabriel Genellina



From jjl at pobox.com  Sat Mar 10 18:05:49 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 10 Mar 2007 23:05:49 GMT
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<1huohy5.1273xi3mtqdc2N%aleax@mac.com>
	<essbfq$ro4$1$830fa7a5@news.demon.co.uk>
	<mailman.4870.1173472397.32031.python-list@python.org>
Message-ID: <874pos1yy6.fsf@pobox.com>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:

> En Fri, 09 Mar 2007 16:10:51 -0300, Tim Bradshaw <tfb at tfeb.org> escribi???:
[...]
> > ill-conceived idea (not because of Python, note!).  The electronic
> > gadget people need in the developing world is a mobile phone not a
> > computer.
> 
> What for?
> That requires a phone company, installed antennas everywhere, and
> available power to charge batteries. Without forgetting  you to pay
> the  bill, of course.
> I don't think OLPC would actually help people so much, but a mobile
> phone  would be almost useless.
[...]

How wrong can you get?

Mobile phones have been making a significant economic impact in many
places in the third world.  Sub-saharan Africa has seen huge growth in
access to mobile phones over the past few years, for example.  A
recent report indicates there are now over 100 million mobile phones
in use in Africa.  That's a huge change im communications from five
years ago, but more than that, since people often don't own a mobile,
but rent them by the minute from at the roadside, access levels must
be much higher than that would imply (i.e., much greater than 10% of
the continent's population).

Mobile connections are intrinsically cheaper than fixed-line networks,
can be rolled out faster, and have a disproportionately large impact
in places where such electronic communications have in the past been
absent, when compared with places like Europe and the US.  For
example, farmers report that they find mobile phones valuable to get
information on market prices; without them, they would in the past
have little choice but to physically go to market and hope for the
best.

http://www.timesonline.co.uk/tol/news/world/article737130.ece


I know nothing about OLPC, but I hope they're spending lots of time
talking to children, teachers, and academics, and to anybody with a
good criticism.  It must be tricky for big projects to stay connected
to reality.


John


From wuwei23 at gmail.com  Wed Mar  7 23:59:26 2007
From: wuwei23 at gmail.com (alex23)
Date: 7 Mar 2007 20:59:26 -0800
Subject: merits of Lisp vs Python
In-Reply-To: <eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
Message-ID: <1173329966.266070.283130@8g2000cwh.googlegroups.com>

John Nagle wrote:
> Hosting providers and distro
> makers aren't concerned over whether Python works.  They
> care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
> Ask them.

Do you have any real experience with recent linux distros? Or with any
_real_ hosting providers?

Because what you've said is clearly not true. Just because the
situation isn't as easy _for you_ as you would like, doesn't mean that
Python is being ignored to the extent you're trying to claim.

-alex23



From bbxx789_05ss at yahoo.com  Tue Mar 20 20:33:54 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 20 Mar 2007 17:33:54 -0700
Subject: Imports
In-Reply-To: <1174416672.629041.122320@l77g2000hsb.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>
Message-ID: <1174437234.349310.304400@l77g2000hsb.googlegroups.com>

On Mar 20, 12:51 pm, kyoso... at gmail.com wrote:
> I typically just import sys and then do a
> sys.path.append(directoryPath). This basically makes whatever modules
> in that path available at run time. If you need a beginners reference
> book, I recommend "Beginning Python" by Hetland. "Python Programming
> for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
> get into the internals of the language like Hetland does. Once you're
> a snake charmer too, you can "graduate" to the "Programming Python"
> book by Lutz.
>
> Mike

I can't access any modules using the sys.path.append() method.  Here
is my directory structure:

/
----Users
---------Me
------------2testing
------------------dir1
---------------------test1.py
---------------------programs_python
-----------------------------testA.py

testA.py:
------------------------
def show(x):
        print x

if __name__ == "__main__":
        show("hello")
------------------------

test1.py:
------------------------
import sys

sys.path.append("/Users/Me/2testing/dir1/programs_python")
testA.show("hello")
------------------------

command:
~/2testing/dir1$ python test1.py

output:
Traceback (most recent call last):
  File "test1.py", line 4, in ?
    testA.show("hello")
NameError: name 'testA' is not defined

Any idea how to do that?



From gagsl-py2 at yahoo.com.ar  Mon Mar 19 18:35:02 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 19:35:02 -0300
Subject: Pycron for windows - please help
References: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>
Message-ID: <op.tpgjoo2dx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 Mar 2007 16:00:04 -0300, Al <bernala at gmail.com> escribi?:

> I looked in the pycron.log file, and I noticed that for the entires of
> my new job, I see "rc=4" and the end of each line. All other jobs have
> "rc=0" at the end of the line. I assume then, that rc=4 is a reference
> to an error code of some kind, but there is no information on this in
> the readme.txt, at the pycron website, or here in groups.
>
> Does anyone know how to troubleshhot this? Thanks in advance.

Contacting the author?

-- 
Gabriel Genellina



From ptmcg at austin.rr.com  Thu Mar 29 14:33:18 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 29 Mar 2007 11:33:18 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
Message-ID: <1175193198.147869.293260@d57g2000hsg.googlegroups.com>

On Mar 29, 1:19 pm, aral... at aol.com wrote:
> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan

I have a fake supervisor reference generator for job interviews, a
fake house inspection generator for real estate transactions, and a
fake parole testimony generator - maybe you could adapt one of them
(unfortunately, they are written in dissembler).

-- Paul



From aleax at mac.com  Wed Mar 21 01:53:04 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 22:53:04 -0700
Subject: dictionary.copy()?
References: <1174456167.319603.88020@l75g2000hse.googlegroups.com>
Message-ID: <1hvaq4z.1ct3azj5ddn53N%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> Here is some example code:
> 
> d = {"a":"hello", "b":[1, 2, 3]}
> 
> x = d.copy()
> d["b"][0]=10
> print x
> 
> output:
> {'a': 'hello', 'b': [10, 2, 3]}
> 
> It looks like the key names of a dictionary store pointers to the
> values?  Or does a dictionary object manage pointers to keys and
> values, so copy() above just copies 4 pointers?

dict objects hold references (roughly the same as C pointers) to keys
and values, and dict.copy does a shallow copy.  If you want a deep copy,
import copy and x=copy.deepcopy(d) instead.

Deep copies are very costly (because they copy a lot of data bits rather
than just references), so it's quite sensible to have to ask for one
very specifically in the rare cases in which you really want it.


Alex
 


From joshua at eeinternet.com  Wed Mar  7 15:01:25 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 07 Mar 2007 11:01:25 -0900
Subject: Why does SocketServer default allow_reuse_address = false?
References: <45e3668e$0$16385$88260bb3@free.teranews.com>
	<1173278345.027948.94700@j27g2000cwj.googlegroups.com>
Message-ID: <45ef0d8e$0$16290$88260bb3@free.teranews.com>

Greg Copeland wrote:
>> Is there some history to this of which I'm not aware?  Is there a good
>> reason for it to default to false?
<SNIP Greg's very informative reply>
> Long story short, it is not a bug.  It is a feature.  The proper
> default is that of the OS, which is to ensure SO_REUSEADDR is disabled
> unless you absoluetely understand what you're buying by enabling it.

Thanks for your reply.  Those are all point of which I had not been aware.

My problem (and the reason I set reuse to True) is this: if I have
connections active when I restart my service, upon restart, the socket will
fail to bind because there is still a connection in a WAIT state.  And
until that old connection goes away (30 seconds or so?) I cannot restart
the service.  So, the only option would be to sit there in a loop calling
serve_forever until it doesn't throw a "can't bind to socket" exception.

Or is there something I'm *really* missing about the way SocketServer is
supposed to work?  Am I supposed to notify my connection threads to shut
down and disconnect "properly?"  Which gets even more fun since they are
sitting there waiting for input on the connection and not in a position to
respond to other events...gets back to the fun of "killing" threads that
are blocking.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 10 08:45:30 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 11 Mar 2007 00:45:30 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<DThIh.10892$tD2.3813@newsread1.news.pas.earthlink.net>
Message-ID: <pan.2007.03.10.13.45.29.402878@REMOVE.THIS.cybersource.com.au>

On Fri, 09 Mar 2007 18:41:39 +0000, Dennis Lee Bieber wrote:

> On 9 Mar 2007 06:44:01 -0800, "cesco" <fd.calabrese at gmail.com> declaimed
> the following in comp.lang.python:
> 
>> I have to generate a list of N random numbers (integer) whose sum is
>> equal to M. If, for example, I have to generate 5 random numbers whose
>> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
>> simple pattern or function in Python to accomplish that?
>>
> 	Well... Just that the last number is not random -- it has to equal
> (using your limit of 50 and 5 numbers):
> 
> fifth = 50 - sum(first, second, third, fourth) 

Doesn't mean that it isn't random. After all, the first four numbers are
random, therefore their sum is random. 50 - (something random) is also
random.

In practice, one would deterministically generate the last number needed,
but that last number is unpredictable because the first four numbers are
unpredictable. 

Remember that random numbers are not necessarily unconstrained, nor are
they necessarily uniformly distributed. We blithely talk about "random
numbers", but of course there is a constraint that we're selecting from a
finite range. Any finite range of numbers, no matter how big, is a
vanishingly small percentage of all the possible numbers.



-- 
Steven.



From exarkun at divmod.com  Thu Mar 29 07:52:22 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 29 Mar 2007 06:52:22 -0500
Subject: socket read timeout
In-Reply-To: <000e01c771d2$2f3dd240$03000080@hendrik>
Message-ID: <20070329115222.18920.994320595.divmod.quotient.6408@ohm>

On Thu, 29 Mar 2007 07:29:35 +0200, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
> <skip at p....x.com> wrote:
>
>
>>
>>     hg> My issue with that is the effect on write: I only want a timeout on
>>     hg> read ...  but anyway ...
>>
>> So set a long timeout when you want to write and short timeout when you want
>> to read.
>>
>
>Are sockets full duplex?

Uh, yes.

>
>I know Ethernet isn't.

Not that this is relevant, but unless you're using a hub, ethernet _is_
full duplex.

Jean-Paul


From turd.flop.down.mleg at gmail.com  Thu Mar 15 03:24:30 2007
From: turd.flop.down.mleg at gmail.com (Turd Flop Down M'leg)
Date: 15 Mar 2007 00:24:30 -0700
Subject: Python eggs and openSuse 10.2 errors
In-Reply-To: <1173942600.262524.196550@n59g2000hsh.googlegroups.com>
References: <1173942600.262524.196550@n59g2000hsh.googlegroups.com>
Message-ID: <1173943470.349789.167060@e1g2000hsg.googlegroups.com>

Ahh bother...

After messing around with yast, I realized that I didnt have the
python dev packages installed.  Once I installed them with yast, I
just had to create a directory 'site-packages' under /usr/local/lib/
python2.5 and it all worked fine...

Bah!



From ntv1534 at gmail.com  Fri Mar  2 05:23:32 2007
From: ntv1534 at gmail.com (MooMaster)
Date: 2 Mar 2007 02:23:32 -0800
Subject: decimal and context objects!
In-Reply-To: <1172830118.276246.101820@30g2000cwc.googlegroups.com>
References: <1172830118.276246.101820@30g2000cwc.googlegroups.com>
Message-ID: <1172831011.999674.212210@p10g2000cwp.googlegroups.com>

On Mar 2, 3:08 am, "MooMaster" <ntv1... at gmail.com> wrote:
> Hey guys, I'm trying to do some black magic voodoo and it's a little
> late, so forgive me if this question seems obvious or has been asked
> before. I tried doing a search on context objects and didn't find
> anything that popped out, and I'm too tired to keep digging.
>
> I'm making a little program that is trying to do weird and sexy things
> by fully leveraging the power of all the built-in beauty of Python. I
> was trying to play around with the new features added into Python 2.5,
> and ran into an unexpected issue...check this out:
>
> >>> moo = lambda x, y : decimal.Context(3).sqrt(decimal.Context(3).power(x,2) + decimal.Context(3).power(y,2))
> >>> moo
>
> <function <lambda> at 0x02CD0EB0>>>> row = [1,2,3,4,5]
> >>> weight_vector = .00556
> >>> moo(sum(row), weight_vector)
>
> Traceback (most recent call last):
>   File "<pyshell#5>", line 1, in <module>
>     moo(sum(row), weight_vector)
>   File "<pyshell#1>", line 1, in <lambda>
>     moo = lambda x, y :
> decimal.Context(3).sqrt(decimal.Context(3).power(x,2) +
> decimal.Context(3).power(y,2))
>   File "C:\Python25\lib\decimal.py", line 2662, in power
>     return a.__pow__(b, modulo, context=self)
> TypeError: wrapper __pow__ doesn't take keyword arguments
>
> I have no idea what keyword argument is getting passed to __pow__,
> anyone know what's going on?
>
> This should compute sqrt(5^2 + 3^2)


Oh sorry, ignore that last line, that was a copy/paste from another
example I forgot to remove...OBVIOUSLY it's going to compute something
else, that's not what I'm asking about...stupid late night hacking! XD



From steven.bethard at gmail.com  Mon Mar 19 23:00:23 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Mon, 19 Mar 2007 21:00:23 -0600
Subject: an enumerate question
In-Reply-To: <1174356075.710324.321150@b75g2000hsg.googlegroups.com>
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
	<7xr6rkr8gw.fsf@ruckus.brouhaha.com>
	<1174356075.710324.321150@b75g2000hsg.googlegroups.com>
Message-ID: <sLmdnYMmZYbV02LYnZ2dnUVZ_tyinZ2d@comcast.com>

eight02645999 at yahoo.com wrote:
> for n,l in enumerate(open("file")):
>    print n,l # this prints current line
>    print next line in this current iteration of the loop.

Depends what you want to happen when you request "next".  If you want to 
renumber the lines, you can call .next() on the iterator::

     >>> open('temp.txt', 'w').write('1\n2\n3\n4\n5\n6\n7\n')
     >>> lines_iter = open('temp.txt')
     >>> for i, line in enumerate(lines_iter):
     ...     print 'LINE %i, %r %r' % (i, line, lines_iter.next())
     ...
     LINE 0, '1\n' '2\n'
     LINE 1, '3\n' '4\n'
     LINE 2, '5\n' '6\n'
     Traceback (most recent call last):
       File "<interactive input>", line 2, in <module>
     StopIteration

If you want to peek ahead without removing the line from the iterator, 
check out this recipe::

     http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/304373

Which allows code like::

     >>> lines_iter = peekable(open('temp.txt'))
     >>> for i, line in enumerate(lines_iter):
     ...     print 'LINE %i, %r %r' % (i, line, lines_iter.peek())
     ...
     LINE 0, '1\n' '2\n'
     LINE 1, '2\n' '3\n'
     LINE 2, '3\n' '4\n'
     LINE 3, '4\n' '5\n'
     LINE 4, '5\n' '6\n'
     LINE 5, '6\n' '7\n'
     Traceback (most recent call last):
       ...
     StopIteration

(Note that the recipe doesn't try to catch the StopIteration, but if you 
want that suppressed, it should be a pretty simple change.)

STeVe


From n00m at narod.ru  Thu Mar 15 20:04:36 2007
From: n00m at narod.ru (n00m)
Date: 15 Mar 2007 17:04:36 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174000951.999433.149760@n59g2000hsh.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<1174000951.999433.149760@n59g2000hsh.googlegroups.com>
Message-ID: <1174003476.900115.233410@e65g2000hsc.googlegroups.com>

Your suggestion speeded it up 1.5 times (on my 4000 test input rows)!



From steve at REMOVE.THIS.cybersource.com.au  Mon Mar 26 18:17:16 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 27 Mar 2007 08:17:16 +1000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916449.171929.138950@n76g2000hsh.googlegroups.com>
Message-ID: <pan.2007.03.26.22.17.16.194451@REMOVE.THIS.cybersource.com.au>

On Mon, 26 Mar 2007 06:40:49 -0700, kyosohma wrote:

> Fortran also appears to be a compiled language, whereas Python is an
> interpreted language.

Sheesh. Do Java developers go around telling everybody that Java is an
interpreted language? I don't think so.

What do you think the "c" in ".pyc" files stands for? "Cheese"?


-- 
Steven.


From carsten at uniqsys.com  Fri Mar 16 10:13:20 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 16 Mar 2007 10:13:20 -0400
Subject: Writing python module in C: wchar_t or Py_UNICODE?
In-Reply-To: <1174043065.189483.123640@b75g2000hsg.googlegroups.com>
References: <1174043065.189483.123640@b75g2000hsg.googlegroups.com>
Message-ID: <1174054400.3500.29.camel@dot.uniqsys.com>

On Fri, 2007-03-16 at 04:04 -0700, Yury wrote:
> I am new to python and programming generally, but someday it is time
> to start :)
> I am writing a python module in C and have a question about multibyte
> character strings in python<=>C.
> I want a C function which takes a string as argument from python
> script:
> 
> static PyObject *
> connect_to_server(PyObject *self, PyObject * authinfo){
> wchar_t * login;  /* Must support unicode */
> char * serveraddr;
> int * port;
> 
> if(!PyArgsParseTuple(authinfo, "sdu", &serveraddr, &port, &login))
> return NULL;
> 
> ...
> 
> Will that code work?
> Or i should use Py_UNICODE * data type? Will it be compatible with
> standard C string comparison/concantenation functions?

You should familiarize yourself with the Python/C API documentation. It
contains the answers to all the above questions.

http://docs.python.org/api/arg-parsing.html says this about the "u"
format character: "a pointer to the existing Unicode data is stored into
the Py_UNICODE pointer variable whose address you pass."

http://docs.python.org/api/unicodeObjects.html says this about
Py_UNICODE: "On platforms where wchar_t is available and compatible with
the chosen Python Unicode build variant, Py_UNICODE is a typedef alias
for wchar_t to enhance native platform compatibility."

The first quote says that, to be strictly correct, "login" should be a
"Py_UNICODE*", but the second quote says that under the right
circumstances, Py_UNICODE is the same as wchar_t. It's up to you to
determine if your platform provides the right circumstances for this to
be the case.

Hope this helps,

Carsten.




From mail at timgolden.me.uk  Thu Mar 29 09:23:31 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 Mar 2007 14:23:31 +0100
Subject: Finding User Profile path
In-Reply-To: <1175173141.277735.192020@o5g2000hsb.googlegroups.com>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>	<mailman.5745.1175154506.32031.python-list@python.org>
	<1175173141.277735.192020@o5g2000hsb.googlegroups.com>
Message-ID: <460BBDD3.7080103@timgolden.me.uk>

kyosohma at gmail.com wrote:
> One of my co-workers thought I could do
> something like this:
> 
> c = wmi.WMI()
> for i in c.Win32_UserAccount(Name=user):
>     # Get user paths somehow.
> 
> I messed around with that, but I think he was mistaken. It has lots of
> good info, but not what I need.
> 
> I apologize for not being specific. I will look at those win32net
> functions.
> 
> Mike

Might depend on what you mean by "profile" but would the
users' homeDirectory/homeDrive active directory attributes
or the profilePath be of use here? If so, they're fairly
easy to get hold of.

TJG


From trentm at activestate.com  Mon Mar 12 18:24:45 2007
From: trentm at activestate.com (Trent Mick)
Date: Mon, 12 Mar 2007 15:24:45 -0700
Subject: Python for amd64 and x86 on Windows
In-Reply-To: <FA6F7E8FE294AA4A8647CC128C2579690171C1AC@ERLM862A.ww001.siemens.net>
References: <FA6F7E8FE294AA4A8647CC128C2579690171C1AC@ERLM862A.ww001.siemens.net>
Message-ID: <45F5D32D.6070705@activestate.com>

Hengel, Simon wrote:
> Hello List,
> I need the amd64 and the x86 version of Python installed on one Windows machine. Is there a way to do this? (I think I read about it somewhere, but now I can't find it anymore)

Bit of a hack but you could install the MSI ActivePython package for one and 
the "AS Package" (*) ActivePython package for the other.

http://downloads.activestate.com/ActivePython/windows/2.4/
	ActivePython-2.4.3.12-win32-x86.msi
	ActivePython-2.4.3.12-win64-x64-nopywin32.zip

(*) "AS Package" is simple "zip file plus an install script" installer that 
ActivePython includes in addition to the usual (and preferred MSI installer).

Trent

p.s. ActivePython 2.5 builds will be out this week.

-- 
Trent Mick
trentm at activestate.com


From aspineux at gmail.com  Thu Mar 29 11:48:14 2007
From: aspineux at gmail.com (aspineux)
Date: 29 Mar 2007 08:48:14 -0700
Subject: make RE more cleaver to avoid inappropriate :
	sre_constants.error: redefinition of group name
In-Reply-To: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
References: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
Message-ID: <1175183294.220096.105870@l77g2000hsb.googlegroups.com>

On 29 mar, 16:22, "aspineux" <aspin... at gmail.com> wrote:
> I want to parse
>
> 'foo at bare' or '<foot at bar>' and get the email address foo at bar
>
> the regex is
>
> r'<\w+@\w+>|\w+@\w+'
>
> now, if I want to give it a name
>
> r'<(?P<email>\w+@\w+)>|(?P<email>\w+@\w+)'
>
> sre_constants.error: redefinition of group name 'email' as group 2;
> was group 1
>
> BUT because I use a | , I will get only one group named 'email' !

THEN my regex is meaningful, and the error is meaningless and
somrthing
should be change into 're'

But maybe I'm wrong ?

>
> Any comment ?

I'm trying to start a discussion about something that can be improved
in 're',
not looking for a solution about email parsing :-)


>
> PS: I know the solution for this case is to use  r'(?P<lt><)?(?P<email>
> \w+@\w+)(?(lt)>)'




From steve at holdenweb.com  Thu Mar 22 05:55:03 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 05:55:03 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <Xns98FB5C293918duncanbooth@127.0.0.1>
References: <ets9hc$74f$1@news.onet.pl>	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>	<etscd5$g0g$1@news.onet.pl>	<mailman.5432.1174527485.32031.python-list@python.org>	<1174528562.192439.84480@l77g2000hsb.googlegroups.com>
	<Xns98FB5C293918duncanbooth@127.0.0.1>
Message-ID: <ettjse$dn6$1@sea.gmane.org>

Duncan Booth wrote:
> "Virgil Dupras" <hardcoded.software at gmail.com> wrote:
> 
>> I think I see what Marcin means. The 'node' is changed too fast in the
>> chain, and next is assigned to 'nextnode' instead of being assigned to
>> node.
> 
> I can see why Marcin was confused. Many other languages assignment is an 
> expression, so a=b=c is simply a=(b=c). In Python it isn't an expression, 
> the chained assignment is a specific part of the syntax, so (as with 
> chained comparisons) the semantics may be surprising to the uninitiated.
> 
> As a matter of interest do PyLint or PyChecker check for this situation 
> (chained assignment where the target of an assignment is also a 
> subexpression of a later assignment)?
> 
Where's the published syntax for chained assignment?

> Also it may be worth noting that unpacking has a similar behaviour:
> 
>    node, node.next = nextnode, nextnode
> 
> has the same result as the chained assignment: the RHS is a tuple and is 
> fully evaluated before the assignment, but the LHS is not a tuple and the 
> assignment happens strictly left to right with each assignment fully 
> completed before proceeding to the next one.
> 
Well that is explained (albeit badly) in the reference manual:

"""An assignment statement evaluates the expression list (remember that 
this can be a single expression or a comma-separated list, the latter 
yielding a tuple) and assigns the single resulting object to each of the 
target lists, from left to right."""

That wording appears to be a rather bad mix of factoids from unpacking 
and chained assignment. Is it just me, or does this whole section need a 
rewrite?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From gdamjan at gmail.com  Thu Mar 29 19:26:32 2007
From: gdamjan at gmail.com (Damjan)
Date: Fri, 30 Mar 2007 01:26:32 +0200
Subject: socket read timeout
References: <U39Oh.178798$BK1.144837@newsfe13.lga><eub6un$k3d$3@nemesis.news.tpi.pl><mailman.5668.1175003334.32031.python-list@python.org><VegOh.15507$nh4.13055@newsfe20.lga><mailman.5688.1175034299.32031.python-list@python.org><MukOh.12989$Ng1.10639@newsfe19.lga>
	<17930.25631.86693.827473@montanaro.dyndns.org>
	<mailman.5743.1175153425.32031.python-list@python.org>
Message-ID: <460c4ae5$0$90276$14726298@news.sunsite.dk>

>> So set a long timeout when you want to write and short timeout when you
>> want to read.
>> 
> 
> Are sockets full duplex?
> 
> I know Ethernet isn't.

Both are full duplex.

-- 
damjan


From mail at microcorp.co.za  Tue Mar 27 08:43:10 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 27 Mar 2007 14:43:10 +0200
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com><56prsrF2am4a1U1@mid.uni-berlin.de><mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
Message-ID: <000201c770f9$6bb8f6c0$03000080@hendrik>

 "Nick Craig-Wood" <nick at craig-wood.com> wrote:


> Hendrik van Rooyen <mail at microcorp.co.za> wrote:

> 
> >  But would be useful to be able to do without messing with
> >  threads and GUI and imports. 
> >  Could be hard to implement as the interpreter would have 
> >  to be assured of getting control back periodically, so a 
> >  ticker interrupt routine is called for - begins to sound more 
> >  like a kernel function to me.  
> >  Isn't there something available that could be got at via ctypes?
> 
> I think if we aren't executing python bytecodes (ie are blocked in the
> kernel or running in some C extension) then we shouldn't try to
> interrupt.  It may be possible - under unix you'd send a signal -
> which python would act upon next time it got control back to the
> interpreter, but I don't think it would buy us anything except a whole
> host of problems!

Don't the bytecodes call underlying OS functions? - so is there not a case
where a particular bytecode could block, or all they all protected by
time outs?
Embedded code would handle this sort of thing by interrupting anyway
and trying to clear the mess up afterward - if the limit switch does not
appear after some elapsed time, while you are moving the 100 ton mass,
you should abort and alarm, regardless of anything else...
And if the limit switch sits on a LAN device, the OS timeouts could be
wholly inappropriate...

- Hendrik



From supervau at gmail.com  Tue Mar 27 15:50:50 2007
From: supervau at gmail.com (Frank)
Date: 27 Mar 2007 12:50:50 -0700
Subject: rpy: parsing arrays from python to R
Message-ID: <1175025050.708740.261370@e65g2000hsc.googlegroups.com>


Hi,

I use rpy on linux to call R functions. Works fine up to the following
problem: How to parse arrays (no vectors, that means 2-dimensional) to
R without much effort?

The following code solves the problem (in two different ways).
However, it seems to me that there might be a way to do it more
efficiently.

rpy.r.assign("N", N)
rpy.r("A2 <- array(1:N^2, dim=c(N,N))")
rpy.r("A3 <- array(1:N^2, dim=c(N,N))")


for i in range(N):               # two alternative ways to parse
arrays
    rpy.r.assign("Wi", W[i])
    rpy.r.assign("i", i+1)
    rpy.r("""for( j in 1:N ){
    A2[i,j] <- Wi[j]}""")
    for k in range(N):
        rpy.r.assign("k", k+1)
        rpy.r("A3[i,k] <- Wi[k]")


print rpy.r("A3")
print rpy.r("A2")


As I see it, the problem is, that the 'assign' command works only
either for scalars or vectors (one-dimensional arrays but not more-
dimensional arrays). I tried it for 2-dimensional arrays and the
result is a list whose components are vectors. Again, this is easy to
convert to a two-dimensional array but the point here is that one has
to do it.

Maybe there are people using R with python who have some more
experience. I would be interested how they solved this problem.

Thanks!

Frank



From python at rcn.com  Mon Mar  5 02:31:30 2007
From: python at rcn.com (Raymond Hettinger)
Date: 4 Mar 2007 23:31:30 -0800
Subject: Descriptor/Decorator challenge
Message-ID: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>

I had an idea but no time to think it through.
Perhaps the under-under name mangling trick
can be replaced (in Py3.0) with a suitably designed decorator.
Your challenge is to write the decorator.
Any trick in the book (metaclasses, descriptors, etc) is fair game.


Raymond

-------- how we currently localize method access with name mangling
------
class A:
    def __m(self):
        print 'A.__m'
    def am(self):
        self.__m()

class B(A):
    def __m(self):
        print 'B.__m'
    def bm(self):
        self.__m()

m = B()
m.am()     # prints 'A.__m'
m.bm()     # prints 'B.__m'


-------- how I would like to localize method access with a decorator
------
class A:
    @localmethod
    def m(self):
        print 'A.m'
    def am(self):
        self.m()

class B(A):
    @localmethod
    def m(self):
        print 'B.m'
    def bm(self):
        self.m()

m = B()
m.am()     # prints 'A.m'
m.bm()     # prints 'B.m'

---------------------

P.S. Here's a link to the descriptor how-to:
    http://users.rcn.com/python/download/Descriptor.htm



From aahz at pythoncraft.com  Wed Mar 28 19:58:15 2007
From: aahz at pythoncraft.com (Aahz)
Date: 28 Mar 2007 16:58:15 -0700
Subject: how can I clear a dictionary in python
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com> <570dbbF28iktlU1@mid.individual.net>
Message-ID: <eueven$eh$1@panix3.panix.com>

In article <570dbbF28iktlU1 at mid.individual.net>,
Bjoern Schliessmann  <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
>Aahz wrote:
>>
>> Go back and read Christian's post, then post a followup explaning
>> why his solution is better than yours.  Your explanation should
>> use id(). 
>
>I wonder how you two seem to know exactly what the OP wants ...

We don't.  However, we do know exactly what the OP said...  (Perhaps you
didn't read the Subject: line?)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From vel.accel at gmail.com  Tue Mar 27 21:39:14 2007
From: vel.accel at gmail.com (D.Hering)
Date: 27 Mar 2007 18:39:14 -0700
Subject: PyDoc -g call to Alt-Installed Python
Message-ID: <1175045954.295216.105830@d57g2000hsg.googlegroups.com>

I have both python2.4 and 2.5 installed on a (k)ubuntu linux box. I'm
trying to get the call to pydoc -g (pydoc server called from the
system console) to recognize python2.5 rather than the system's
default 2.4 release.

I've tried several different things so far, to no avail. My console
scripting knowledge, so far, is minimal. Any help here is appreciated.

Thanks,
-Dieter



From fabio.fzero at gmail.com  Tue Mar 20 09:44:27 2007
From: fabio.fzero at gmail.com (Fabio FZero)
Date: 20 Mar 2007 06:44:27 -0700
Subject: Problem with sockets and python 2.5
In-Reply-To: <mailman.5337.1174396011.32031.python-list@python.org>
References: <200703192207.08178.jareguero@telefonica.net>
	<mailman.5337.1174396011.32031.python-list@python.org>
Message-ID: <1174398267.091816.296180@e65g2000hsc.googlegroups.com>

On Mar 20, 10:05 am, Facundo Batista <facu... at taniquetil.com.ar>
wrote:
> Jose Alberto Reguero wrote:
> > 2:
> >    server.py at x86_64 python 2.5
> >    client.py at i386 python 2.4
> > Don't work
>
> What do you mean with "don't work"?
>
> They crash? Your machine hungs? Your house explodes?

Traceback (most recent call last):
  File "server.py", line 1, in <module>
DontWorkError: YOUR HEAD A SPLODE!

:D

FZ



From luismgz at gmail.com  Mon Mar 19 19:46:56 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 19 Mar 2007 16:46:56 -0700
Subject: Passing arguments to a command line from a python script
Message-ID: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>

Please forgive me if what I'm asking is non sense...

I created a little program to authomate the creation of the "setup.py"
script for py2exe.
It simply prompts for the main executable script name and then creates
setup.py, as follows:

# this is "makesetup.py"

nombre = raw_input('File name?: ')

f = open('setup.py', 'w')

f.write('''
from distutils.core import setup
import py2exe

setup( name = "%s",
        windows = ["%s.pyw"],
        data_files = [ (".", ["%s.rsrc.py"]) ]
        )
''' %(nombre, nombre, nombre))

f.close()

# end of script

What I want now is execute the script I just created.
As far as I know, the only way to execute the script is from a command
line and typing "setup.py py2exe".

Can I do this authomatically right from my program?
If so, how?

Any hint would be highly appreciated...
regards,
Luis



From kyosohma at gmail.com  Tue Mar 20 11:59:22 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 08:59:22 -0700
Subject: os.wait() for Windows
In-Reply-To: <mailman.5344.1174404760.32031.python-list@python.org>
References: <mailman.5344.1174404760.32031.python-list@python.org>
Message-ID: <1174406362.923831.202230@l75g2000hse.googlegroups.com>

On Mar 20, 10:32 am, "Damien Byrne" <damobyrne2... at hotmail.com> wrote:
> Hello,
>
> I am new to python. I am using the os module to run a command in a
> bashshell. However I need this process to complete before continuing. Is
> there a command that will wait for this process to complete? I am using
> Windows XP and the os.wait() command only works for UNIX systems, and
> therefore doesn't work.
>
> My code is as follows:
>
> import os
> FileName = raw_input('Enter the file name: ')
> os.system('abaqus job=FileName')
> resultsFile = open('FileName.dat','r')
>
> Abaqus will take a few minutes to complete and create the associated results
> file. However once I run this code I get the following error ... "IOError:
> [Errno 2] No such file or directory: 'FileName.dat'" ... as the file does
> not exist yet. Is there any way of waiting for the job to complete before
> continuing?
>
> I'd appreciate any help.
>
> _________________________________________________________________
> Share folders without harming wildlife!http://www.communicationevolved.com/en-ie/


I would recommend subprocess.call(programToRun) or
subprocess.Popen(programToRun).wait()

Mike



From stefan.behnel-n05pAM at web.de  Mon Mar  5 12:34:49 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Mon, 05 Mar 2007 18:34:49 +0100
Subject: How use XML parsing tools on this one specific URL?
In-Reply-To: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <45ec54ba$0$23132$9b4e6d93@newsspool1.arcor-online.net>

seberino at spawar.navy.mil schrieb:
> I understand that the web is full of ill-formed XHTML web pages but
> this is Microsoft:
> 
> http://moneycentral.msn.com/companyreport?Symbol=BBBY
> 
> I can't validate it and xml.minidom.dom.parseString won't work on it.

Interestingly, no-one mentioned lxml so far:

http://codespeak.net/lxml
http://codespeak.net/lxml/dev/parsing.html#parsers

Parse it as HTML and then use anything from XPath to XSLT to treat it.

Have fun,
Stefan


From arkanes at gmail.com  Mon Mar  5 12:22:00 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 5 Mar 2007 11:22:00 -0600
Subject: Python GUI + OpenGL
In-Reply-To: <552vcfF2339mvU1@mid.uni-berlin.de>
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
	<54r59qF228m8bU1@mid.uni-berlin.de>
	<slrneuo3lh.bth.f98dawa@shii.medic.chalmers.se>
	<552vcfF2339mvU1@mid.uni-berlin.de>
Message-ID: <4866bea60703050922o1a2b3047n73d9914af12fa81e@mail.gmail.com>

On 3/5/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
> Dag wrote:
>
> > On Fri, 02 Mar 2007 18:30:34 +0100, Diez B. Roggisch <deets at nospam.web.de>
> > wrote:
> >> Achim Domma wrote:
> >>
> >>> Hi,
> >>>
> >>> I'm developing a GUI app in Python/C++ to visualize numerical results.
> >>> Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there
> >>> are no windows binaries for Python 2.5 for quite some time now.
> >>>
> >>> I need a OpenGL context without restrictions and some settings dialogs.
> >>> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set
> >>> of tools/libs?
> >>
> >> PyQt, but then there is the licensing question of course.
> >
> > I'm facing a similar problem.  Would you care to explain why PyQt is
> > better in this particular case.  I've used both PyQt and wx for 'normal'
> > GUI programming (but I'm more familiar with wx) so I know about their
> > difference in general.  But why is PyQt better than wx for working with
> > OpenGL?
>
> I didn't say so. I just pointed out an alternative, as the OP had issues
> with obtaining binary packages for wx + py2.5
>

I believe he was having trouble with binary packages for PyOpenGL,
wxPython has 2.5 binaries and has since it was released.

That said, it's my understanding that the most recent version of
PyOpenGL uses ctypes and no longer requires a windows binary, which is
why they are not provided.

Also, if you're writing a C++/Python app on Windows then you must have
the correct environment to build Python extensions, so even if my
understanding is incorrect, you should be able to build PyOpenGL via
distutils with minimal if any trouble.

> Beside that, I do love the Qt library and would always use it in preference
> to wx, but this is a general thing and by no means tied to the
> OpenGL-programming. After all, that actually is done using PyOpenGL
>

wx and Qt support OpenGL in essentially the same manner. I believe he
took from your earlier post that Qt had its own built in OpenGL
wrapper (and thus didn't rely on PyOpenGL) but to my knowledge that is
not correct.

> Diez
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From auch-ich-m at g-kein-spam.com  Tue Mar 13 05:35:43 2007
From: auch-ich-m at g-kein-spam.com (=?UTF-8?B?QW5kcsOp?= Malo)
Date: Tue, 13 Mar 2007 10:35:43 +0100
Subject: Program __main__ function
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
	<et5aub$901$1@registered.motzarella.org>
	<87mz2hwuco.fsf_-_@benfinney.id.au>
	<mailman.5003.1173766861.32031.python-list@python.org>
Message-ID: <55n9jkF26klgiU1@mid.individual.net>

Ben Finney wrote:

> Ben Finney <bignose+hates-spam at benfinney.id.au> writes:
> 
>> Now, when I write unit tests for my program (i.e. a Python module
>> designed to be run as a command), it can still be imported safely
>> into my unit tests, and all the code gets covered by test cases
>> except the three-line stanza at the end.
> 
> All I need now is for Python to automatically execute a '__main__'
> function if the module name is '__main__' (which it seems the OP
> expected should happen), and unit test coverage could be 100% :-)

Short hint to go further:
exec file('/usr/lib/python2.4/timeit.py') in {'__name__': '__main__'}

nd


From gigs at hi.t-com.hr  Fri Mar  9 12:01:14 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 09 Mar 2007 18:01:14 +0100
Subject: tkinter text editor
Message-ID: <espfgv$6q7$1@ss408.t-com.hr>

I'm writing text editor.

How to enable/disable (cut, copy etc.) when text is selected/not selected


From MonkeeSage at gmail.com  Mon Mar  5 22:13:05 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 19:13:05 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <7x7itvt6nw.fsf@ruckus.brouhaha.com>
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<7xk5xvgo55.fsf@ruckus.brouhaha.com>
	<1173149481.694255.23350@n33g2000cwc.googlegroups.com>
	<7x7itvt6nw.fsf@ruckus.brouhaha.com>
Message-ID: <1173150785.768534.286700@8g2000cwh.googlegroups.com>

On Mar 5, 9:03 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Maybe I didn't undrestand the question.  Say maxnum is 30 in your
> example above.  Then as soon as 46 is seen, you can stop checking, I
> thought.

Yes, as long as 29 doesn't follow 46.

inlist = [1, 5, 23, 46, 29, 21]

If you want to preserve the items after 46, then you can't just bail
when you see 46. You need to keep looking at the following values and
comparing them against the boundry conditions. If the the input is
sequential, then this isn't a problem, as all items above 46 are out
of range....but if the input is arbitrary, then you have to look at
each index individually as you know. So it really comes down to if the
data set is ordered or arbitrary as to which approach is more
efficient.

Regards,
Jordan



From MonkeeSage at gmail.com  Sat Mar  3 20:52:17 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 17:52:17 -0800
Subject: portable Python ifconfig
In-Reply-To: <1172971079.137861.316170@h3g2000cwc.googlegroups.com>
References: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
	<1172971079.137861.316170@h3g2000cwc.googlegroups.com>
Message-ID: <1172973137.492188.85100@s48g2000cws.googlegroups.com>

On Mar 3, 7:17 pm, "MonkeeSage" <MonkeeS... at gmail.com> wrote:
> I'm pretty sure the offsets would be different for BSD

Then again, mabye not.

http://freebsd.active-venture.com/FreeBSD-srctree/newsrc/compat/linux/linux_ioctl.h.html

Regards,
Jordan



From bearophileHUGS at lycos.com  Wed Mar 21 14:47:16 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 21 Mar 2007 11:47:16 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	couldbe PEP?)
In-Reply-To: <mailman.5413.1174502330.32031.python-list@python.org>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<mailman.5413.1174502330.32031.python-list@python.org>
Message-ID: <1174502836.912713.294390@y80g2000hsf.googlegroups.com>

I have nothing against brackets, and I think Python has used them for
too much time to allow a so big change in its syntax.
But I think in some situations Ruby allows to omit them, solving some
of the "impossibile" problems shown in this thread. This makes Ruby a
bit better than Python to create application-specific mini languages,
that are quite useful in some situations.

Bye,
bearophile



From godzillaismad at gmail.com  Thu Mar 22 18:40:21 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 22 Mar 2007 15:40:21 -0700
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <zazMh.15244$tD2.5343@newsread1.news.pas.earthlink.net>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
	<mailman.5449.1174564707.32031.python-list@python.org>
	<1174567006.244721.115890@n59g2000hsh.googlegroups.com>
	<zazMh.15244$tD2.5343@newsread1.news.pas.earthlink.net>
Message-ID: <1174603221.600706.62210@p15g2000hsd.googlegroups.com>

On Mar 23, 4:38 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
> On 22 Mar 2007 05:36:46 -0700, "Godzilla" <godzillais... at gmail.com>
> declaimed the following in comp.lang.python:
>
> > Steve, I think I've tried what you have suggested without any luck as
> > well... The statement works fine, but what inserted is not correct...
> > it seems like only the symbol '?' was inserted into the blob field...
>
>         You didn't have a set of 's around the ?, did you? Parameter
> substitution will add needed quotes on its own rather than you having to
> put in quotes.
>
>         Also, though I find no documentation on it, odbc module cursors have
> setinputsizes() and setoutputsizes() methods -- perhaps that could
> change things... OTOH: the db-api 1.0 PEP (which is, it seems, what odbc
> module follows) says they may be do-nothing methods.
> --
>         Wulfraed        Dennis Lee Bieber               KD6MOG
>         wlfr... at ix.netcom.com             wulfr... at bestiaria.com
>                 HTTP://wlfraed.home.netcom.com/
>         (Bestiaria Support Staff:               web-a... at bestiaria.com)
>                 HTTP://www.bestiaria.com/

Everything seems to work fine right now... thanks all of you for
helping... Have a great day..



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar  8 03:12:52 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 09:12:52 +0100
Subject: Bug in python!?  persistent value of an optional parameter in
	function!
In-Reply-To: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
Message-ID: <45efc562$0$21514$426a34cc@news.free.fr>

C Barr Leigh a ?crit :
> Help! Have I found a serious bug?

No. This is a FAQ. Default arguments of functions are evaled only once - 
when the def statement is eval'd and the function object constructed.

> This seems like highly undesired behaviour to me.

Possibly, but this is unlikely to change in a near future, so you'd 
better get used to it. If you want mutable objects as default values for 
functions, the idiom is:

def some_func(default=None):
   if default is None:
     default = []
   # code here

HTH


From uri at stemsystems.com  Thu Mar 29 18:02:46 2007
From: uri at stemsystems.com (Uri Guttman)
Date: Thu, 29 Mar 2007 17:02:46 -0500
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460c30b1$0$8750$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <x7odmbbtdl.fsf@mail.sysarch.com>


please DO NOT EVER followup xah's posts into comp.lang.perl.misc. he is
not wanted there and is considered a troll. he hates perl so why he
crossposts there is a question. if you want to followup, post only in
your own group. keep him and his useless threads out of c.l.p.misc.

uri

-- 
Uri Guttman  ------  uri at stemsystems.com  -------- http://www.stemsystems.com
--Perl Consulting, Stem Development, Systems Architecture, Design and Coding-
Search or Offer Perl Jobs  ----------------------------  http://jobs.perl.org


From bj_666 at gmx.net  Mon Mar  5 05:45:38 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 05 Mar 2007 11:45:38 +0100
Subject: Dictionary of Dictionaries
References: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
Message-ID: <pan.2007.03.05.10.45.37.894261@gmx.net>

In <1173090144.783533.163920 at p10g2000cwp.googlegroups.com>, bg_ie wrote:

> What am I doing wrong?

`dict.fromkeys()` stores the given object for all keys, so you end up with
the *same* dictionary for 'one' and 'two'.

In [18]: a = dict.fromkeys(("one","two"), {})

In [19]: a
Out[19]: {'two': {}, 'one': {}}

In [20]: a['one']['x'] = 42

In [21]: a
Out[21]: {'two': {'x': 42}, 'one': {'x': 42}}

In [22]: a['one'] is a['two']
Out[22]: True

Ciao,
	Marc 'BlackJack' Rintsch


From FlipFish2007 at yahoo.com  Fri Mar 30 17:23:57 2007
From: FlipFish2007 at yahoo.com (FlipFish2007 at yahoo.com)
Date: 30 Mar 2007 14:23:57 -0700
Subject: I can't get multi-dimensional array to work...
In-Reply-To: <1175288195.207852.150320@p15g2000hsd.googlegroups.com>
References: <1175288195.207852.150320@p15g2000hsd.googlegroups.com>
Message-ID: <1175289837.359022.62220@o5g2000hsb.googlegroups.com>

On Mar 30, 4:56 pm, "erikcw" <erikwickst... at gmail.com> wrote:
> Hi,
>
> I'm trying to create a multidimensional data structure.  However, id
> doesn't seem to work past the 2nd dimension.
>
> Here is my method:
>
> def endElement(self, name):
>         if name == 'row' :
>             if not self.data.has_key(self.parent):
>                 self.data[self.parent] = {}
>             elif not self.data[self.parent].has_key(self.child):
>                 self.data[self.parent][self.child] = []
>             self.data[self.parent]
> [self.child].append((self.creativeid, self.clicks, self.imps))
>
> I've tried all kinds of different variations, and I keep getting the
> same result:
>
> Traceback (most recent call last):
>   File "sax.py", line 123, in ?
>     parser.parse(open('report.xml'))
>   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
> line 109, in parse
>     xmlreader.IncrementalParser.parse(self, source)
>   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/xmlreader.py",
> line 123, in parse
>     self.feed(buffer)
>   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
> line 216, in feed
>     self._parser.Parse(data, isFinal)
>   File "/usr/lib/python2.4/site-packages/_xmlplus/sax/expatreader.py",
> line 315, in end_element
>     self._cont_handler.endElement(name)
>   File "sax.py", line 51, in endElement
>     self.data[self.parent][self.child].append((self.creativeid,
> self.clicks, self.imps))
> KeyError: u'Pickup Trucks'
>
> I have a lot of php experience - am I accidentally doing a "php thing"
> in my code?
>
> Thanks so much for your help!
>
> Erik

I haven't tested it, but superficially I'd suggest giving this a try:

def endElement(self, name):
        if name == 'row' :
            if not self.data.has_key(self.parent):
                self.data[self.parent] = {}
            if not self.data[self.parent].has_key(self.child):
                self.data[self.parent][self.child] = []
            self.data[self.parent]
[self.child].append((self.creativeid, self.clicks, self.imps))





From bjourne at gmail.com  Wed Mar 14 09:57:51 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Wed, 14 Mar 2007 14:57:51 +0100
Subject: Grep Equivalent for Python
In-Reply-To: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
Message-ID: <740c3aec0703140657k3c4e8d29n8ac69395d7185ea8@mail.gmail.com>

> I come from a shell/perl background and have just to learn python.  To
> start with, I'm trying to obtain system information from a Linux
> server using the /proc FS.  For example, in order to obtain the amount
> of physical memory on the server, I would do the following in shell:
>
> grep ^MemTotal /proc/meminfo | awk '{print $2}'
>
> That would get me the exact number that I need.  Now, I'm trying to do
> this in python.  Here is where I have gotten so far:
>
> memFile = open('/proc/meminfo')
> for line in memFile.readlines():
>     print re.search('MemTotal', line)
> memFile.close()

import sys
sys.stdout.write(L.split()[1] + '\n' for L in open('/proc/meminfo') if
L.startswith('MemTotal'))

-- 
mvh Bj?rn


From davecook at nowhere.net  Sun Mar 25 20:00:31 2007
From: davecook at nowhere.net (Dave Cook)
Date: Mon, 26 Mar 2007 00:00:31 GMT
Subject: Beginner GTK question
References: <1174820246.350058.96280@y66g2000hsf.googlegroups.com>
Message-ID: <z2ENh.47807$_R.7847@newsfe23.lga>

On 2007-03-25, dashawn888 <dashawn at gmail.com> wrote:

> gui.py:79: GtkWarning: Quit: missing action
>   menubar = uimanager.get_widget('/MenuBar')

> 				<menuitem name="Quit"/>

This should probably be action="Quit".

Dave Cook


From wollez at gmx.net  Thu Mar  1 15:01:03 2007
From: wollez at gmx.net (WolfgangZ)
Date: Thu, 01 Mar 2007 21:01:03 +0100
Subject: pycrust startup question
Message-ID: <es7be3$fco$1@sea.gmane.org>

Hi,

I've tried to add " from __future__ import division" to the startup 
script of pycrust. It seems to be imported as division is listed in the 
namespace. But it is somehow not activated.

Any suggestions?

PyCrust 0.9.5
Python 2.5



From sickcodemonkey at gmail.com  Thu Mar  1 18:13:55 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Thu, 1 Mar 2007 18:13:55 -0500
Subject: Python win32 tools
Message-ID: <2adc542f0703011513h5fe8ad26o91b0fb6a9825eb91@mail.gmail.com>

I am trying to build a python program that will reset a user's account
(password) on a windows machine (NOTE: my intention here is not to implement
anything malicious {and I know about Trinity which is very useful}, but I
just wanted a challenge and do it myself.).  I have been working with win32
objects and was wondering if this functionality was already built in.

Thanks.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20070301/167ae6a9/attachment.html>

From n00m at narod.ru  Fri Mar 16 01:49:03 2007
From: n00m at narod.ru (n00m)
Date: 15 Mar 2007 22:49:03 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <7xtzwlkhq9.fsf@ruckus.brouhaha.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
Message-ID: <1174024143.049965.25710@l77g2000hsb.googlegroups.com>

Steven, I ran this:

import time, collections, itertools
t = time.clock()

q,w,e,r,sch = [],[],[],[],0

h = collections.defaultdict(itertools.repeat(0).next)

f = open("D:/m4000.txt","rt")

for o in range(int(f.readline())):
  row = map(int, f.readline().split())
  q.append(row[0])
  w.append(row[1])
  e.append(row[2])
  r.append(row[3])

f.close()

for x in q:
  for y in w:
    h[x+y] += 1

for x in e:
  for y in r:
    sch += h[-(x + y)]

q,w,e,r,h = None,None,None,None,None

print sch
print time.clock() - t


========= and it almost froze my PC...
=== but it was faster than my code on input file with 1000 rows:
====== 2.00864607094s VS 3.14631077413s



From nagle at animats.com  Tue Mar 20 15:45:15 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 20 Mar 2007 19:45:15 GMT
Subject: Documentation for "str()" could use some adjustment - Unicode
	issue
In-Reply-To: <1hv8tz5.l61xmz1mtprhiN%aleax@mac.com>
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
	<mailman.5276.1174294980.32031.python-list@python.org>
	<DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>
	<1hv8tz5.l61xmz1mtprhiN%aleax@mac.com>
Message-ID: <fRWLh.46$rO7.22@newssvr25.news.prodigy.net>

Alex Martelli wrote:
> John Nagle <nagle at animats.com> wrote:
>    ...
> 
>>    The real problem is the published books on Python:
>>
>>"Learning Python", by Lutz and Ascher:
>>    "str(string) -- returns the string representation of any object."
>>
>>"Python in a Nutshell", by Martelli
>>    Doesn't really address the issue, but says that "print" calls
>>"str" for conversions.
>>
>>Neither of these mentions that "str" is ASCII-only.
> 
> 
> Are you looking at p. 109 of the 2nd edition of the Nutshell? 

    No, I'm looking at the original edition from 2003.  That
was what Borders had in stock late last year.

				John Nagle


From asandstrom at accesswave.ca  Sat Mar 31 01:24:51 2007
From: asandstrom at accesswave.ca (Arved Sandstrom)
Date: Sat, 31 Mar 2007 05:24:51 GMT
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
	<SFbPh.10507$JZ3.490@newssvr13.news.prodigy.net>
Message-ID: <DgmPh.29532$x9.17555@edtnps89>

"Mike Schilling" <mscottschilling at hotmail.com> wrote in message 
news:SFbPh.10507$JZ3.490 at newssvr13.news.prodigy.net...
> bugbear wrote:
>> Er. How about
>>
>> public class test {
>>   public static void main(String[] args) {
>>     String a = "a string";
>>     String b = "another one";
>>     StringBuffer c = a + b;
>
> String c (etc.), that is.

My answer, Mike. Since there was never any need for variables "a" and "b" to 
be separate, I'd just be blatting out

System.out.println("a stringanother one");

as the solution to this particular problem. It's just a confuscated Hello 
World.

AHS 




From aleax at mac.com  Thu Mar  1 02:00:26 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 28 Feb 2007 23:00:26 -0800
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
Message-ID: <1hu9p0u.1rc19sp19r95zhN%aleax@mac.com>

gregpinero at gmail.com <gregpinero at gmail.com> wrote:

> It seems like this would be easy but I'm drawing a blank.
> 
> What I want to do is be able to open any file in binary mode, and read
> in one byte (8 bits) at a time and then count the number of 1 bits in
> that byte.
> 
> I got as far as this but it is giving me strings and I'm not sure how
> to accurately get to the byte/bit level.
> 
> f1=file('somefile','rb')
> while 1:
>     abyte=f1.read(1)

You should probaby prepare before the loop a mapping from char to number
of 1 bits in that char:

m = {}
for c in range(256):
  m[c] = countones(c)

and then sum up the values of m[abyte] into a running total (break from
the loop when 'not abyte', i.e. you're reading 0 bytes even though
asking for 1 -- that tells you the fine is finished, remember to close
it).

A trivial way to do the countones function:

def countones(x):
  assert x>=0
  c = 0
  while x:
    c += (x&1)
    x >>= 1
  return c

you just don't want to call it too often, whence the previous advice to
call it just 256 times to prep a mapping.

If you download and install gmpy you can use gmpy.popcount as a fast
implementation of countones:-).


Alex


From gagsl-py2 at yahoo.com.ar  Wed Mar  7 12:13:28 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 14:13:28 -0300
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
	<45E8FADB.7000902@cosc.canterbury.ac.nz>
	<1rgq149m7oern$.1080aifmn5qo8$.dlg@40tude.net>
	<mailman.4702.1173156968.32031.python-list@python.org>
	<1fenbu7prg0bm.3q5rj5s6vex4$.dlg@40tude.net>
Message-ID: <op.totwsqqsx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 07 Mar 2007 10:29:29 -0300, Alan Franzoni  
<alan.franzoni_invalid at geemail.invalid> escribi?:

> Il Tue, 06 Mar 2007 01:55:54 -0300, Gabriel Genellina ha scritto:

> If we rely on duck typing, by the way, we may encounter two types  
> quacking
> like ducks, flying like ducks, but in fact acting as slightly different
> ducks. I should remember as well, when designing a container type that I
> want to use in place of a list, to carefully craft an __iadd__ method  
> which
> works just like the a list's own __iadd__ method; if I forget, I may
> introduce a subtle error.

I'm not sure of your concerns. If you want to provide your own container  
that mimics a list, there are a lot more things to consider than __iadd__  
(See the UserList class or this ListMixin recipe:  
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440656).

__iadd__, in general, is not *required* to modify the instance in place  
(but should try to do that, if possible). After this code:
	b = a
	a += c
you can't assert than a and b both refer to the *same* object, as before.  
If you need that, don't use += at all. (For a generic object, I mean. The  
built-in list "does the right thing", of course)

-- 
Gabriel Genellina



From pauld.prismm at comcast.net  Fri Mar 16 19:58:32 2007
From: pauld.prismm at comcast.net (paul debrigida)
Date: Fri, 16 Mar 2007 19:58:32 -0400
Subject: Obtaining Webpage Source with Python
Message-ID: <000601c76827$00e32d50$fa64a8c0@MICROS1>

hey bud this is ryan kaskel just wanted tuch base we have the same name little disapointed i did not come up on my google search                ryan kaskel balt md                search parkville high school lacrosse
-------------- next part --------------
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From olsonas at gmail.com  Wed Mar 14 16:48:49 2007
From: olsonas at gmail.com (Drew)
Date: 14 Mar 2007 13:48:49 -0700
Subject: Converting a list to a dictionary
In-Reply-To: <1173905016.752156.248140@n59g2000hsh.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
	<45f8583d$0$10407$426a34cc@news.free.fr>
	<1173904326.037621.10390@n76g2000hsh.googlegroups.com>
	<1173905016.752156.248140@n59g2000hsh.googlegroups.com>
Message-ID: <1173905329.280910.24450@l75g2000hse.googlegroups.com>

On Mar 14, 4:43 pm, "Samuel" <knipk... at gmail.com> wrote:
> What this does is it maps the id to the object. In your case, you only
> have one id.
>
> -Samuel

This is interesting behavior, but may not be what the original poster
intended. If I understand correctly, this means that if more than one
object shares the same id, only one copy will be created in the dict.
Is this correct?



From bignose+hates-spam at benfinney.id.au  Tue Mar 13 02:20:42 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 13 Mar 2007 17:20:42 +1100
Subject: Program __main__ function
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
	<et5aub$901$1@registered.motzarella.org>
	<87mz2hwuco.fsf_-_@benfinney.id.au>
Message-ID: <87ird5wtol.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> Now, when I write unit tests for my program (i.e. a Python module
> designed to be run as a command), it can still be imported safely
> into my unit tests, and all the code gets covered by test cases
> except the three-line stanza at the end.

All I need now is for Python to automatically execute a '__main__'
function if the module name is '__main__' (which it seems the OP
expected should happen), and unit test coverage could be 100% :-)

> Htag.pl 0.0.23 -  Simon Huggins <huggie at earth.li>  Released under GPL
> Copyright (C) 1999-2002 Project Purple. http://www.earth.li/projectpurple/
>
> Got sigmatch == ^/home/bignose/\.sigs/news.*$

Er, okay. That was a bit strange. Sorry for the flubbed sigmonster.

-- 
 \       "I bet one legend that keeps recurring throughout history, in |
  `\           every culture, is the story of Popeye."  -- Jack Handey |
_o__)                                                                  |
Ben Finney



From skip at pobox.com  Sat Mar 24 15:26:11 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sat, 24 Mar 2007 14:26:11 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174763412.409665.19870@l75g2000hse.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5555.1174759784.32031.python-list@python.org>
	<1174763412.409665.19870@l75g2000hse.googlegroups.com>
Message-ID: <17925.31571.833301.571700@montanaro.dyndns.org>


    bbxx789> Can you explain how that works?  If you install python in
    bbxx789> /usr/local, doesn't that leave you with something like
    bbxx789> /usr/local/python?  So what does putting usr/local/bin ahead of
    bbxx789> your other paths do?

When you install with --prefix==/usr/local you will wind up with
/usr/local/bin/python.  There will also be a /usr/local/lib/pythonX.Y (with
structure underneath it) containing all the Python and extension modules.

Skip


From http  Thu Mar  8 16:25:46 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 13:25:46 -0800
Subject: multithreading concept
References: <mailman.3639.1170813233.32031.python-list@python.org>
	<1170865166.423764.87050@s48g2000cws.googlegroups.com>
	<mZQHh.5714$M65.716@newssvr21.news.prodigy.net>
	<1173352667.089875.174620@q40g2000cwq.googlegroups.com>
Message-ID: <7x4povv351.fsf@ruckus.brouhaha.com>

"Paul Boddie" <paul at boddie.org.uk> writes:
> What makes all of the following not "Pythonic"...?
> http://wiki.python.org/moin/ParallelProcessing

I'd say mainly that they don't allow sharing data between processes
except through expensive IPC mechanisms involving system calls.

> I'm sure one could define "Pythonic" as being "you can write
> code like you do now (but not like any of the ways encouraged by the
> aforementioned solutions) and it just works over multiple processors/
> cores", but that's a view which is somewhat detached from the
> practicalities (and favoured practices) of concurrent programming,
> especially given the few guarantees Python would be able to provide to
> make such a thing work effectively.

Really, the existence of the GIL comes as an unpleasant surprise to
progrmamers used to multi-threaded programming in other languages
whose synchronization features outwardly look about the same as
Python's.  Somehow those other languages manage to use multiple CPU's
based on those features, without needing a GIL.  We are looking at a
Python implementation wart, not "practicalities" inherent in the
nature of concurrency.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Mar 27 01:34:48 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 27 Mar 2007 07:34:48 +0200
Subject: about second parameter of signal handler func.
References: <mailman.5647.1174960713.32031.python-list@python.org>
Message-ID: <56ronoF2a9a19U1@mid.individual.net>

Marco wrote:

> In C, a signal handler function has only one parameter, that is
> signal number. But in Python(import signal), a signal handler
> function has two parameters, the first is signal number, the
> second is "frame"?
> 
> What is "frame", please?

Did you bother using help()?

>>> help(signal)
[...]
    *** IMPORTANT NOTICE ***
    A signal handler function is called with two arguments:
    the first is the signal number, the second is the interrupted
    stack frame.


Regards,


Bj?rn

-- 
BOFH excuse #253:

We've run out of licenses



From tismer at stackless.com  Wed Mar 28 19:02:28 2007
From: tismer at stackless.com (Christian Tismer)
Date: Thu, 29 Mar 2007 01:02:28 +0200
Subject: how can I clear a dictionary in python
In-Reply-To: <4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
Message-ID: <45951AAC-A959-48EE-B69B-0558FF2304F2@stackless.com>


On 29.03.2007, at 00:48, Larry Bates wrote:

> Marko.Cain.23 at gmail.com wrote:
>> Hi,
>>
>> I create a dictionary like this
>> myDict = {}
>>
>> and I add entry like this:
>> myDict['a'] = 1
>> but how can I empty the whole dictionary?
>>
>> Thank you.
>>
>
> just point myDict to an empty dictionary again
>
> myDict={}

This is wrong and not answering the question.
Creating a new dict does not change the dict.
He wants to clear *this* dict, and maybe he
cannot know how many other objects are
referring to this dict.

cheers -- chris


------------------------------------------------------------------
"""pointless questions or useless answers - what do you like more"""


From jjl at pobox.com  Sat Mar 10 19:03:19 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 11 Mar 2007 00:03:19 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
	<45eab67a@news.vo.lu>
	<3hDGh.5963$jx3.2552@newssvr25.news.prodigy.net>
Message-ID: <87mz2kzlx0.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:
[...]
>     Perl, PHP, C, C++, and Java don't have this particular
> problem.  Python stands alone, out in the cold.
[...]

I guess different people's experiences differ.  I remember trying to
install Java on a FreeBSD server a few years back.  I recall no single
software installation that has caused me anywhere near such pain as
that one :-)

Of course, FreeBSD is a minority thing compared with RedHat.


John


From bj_666 at gmx.net  Wed Mar 21 05:42:23 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Wed, 21 Mar 2007 10:42:23 +0100
Subject: How to set SA_RESTART flag in Python
References: <mailman.5380.1174463327.32031.python-list@python.org>
Message-ID: <pan.2007.03.21.09.42.23.129171@gmx.net>

In <mailman.5380.1174463327.32031.python-list at python.org>, Marco wrote:

>  I want to set SA_RESTART flag to restart a system-call. How to do
> this in Python?

You question seems to lack a little bit context.  Are you talking about
system calls into the Linux kernel?

Ciao,
	Marc 'BlackJack' Rintsch


From gabriel.hase at gmail.com  Wed Mar 21 09:03:42 2007
From: gabriel.hase at gmail.com (killkolor)
Date: 21 Mar 2007 06:03:42 -0700
Subject: replace illegal xml characters
In-Reply-To: <pan.2007.03.21.09.39.56.10295@gmx.net>
References: <1174464899.057656.177410@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.09.39.56.10295@gmx.net>
Message-ID: <1174482222.951043.27070@y80g2000hsf.googlegroups.com>

> Does InDesign export broken XML documents?  What exactly is your problem?

yes, unfortunately it does. it uses all possible unicode characters,
though not all are alowed in valid xml (see link in the first post).
in any way for my application i should be checking if the xml that
comes in is valid and replace all non-valid characters. is there
something out there to do this?



From shawn.mcgrath at gmail.com  Mon Mar 19 12:00:47 2007
From: shawn.mcgrath at gmail.com (Shawn  McGrath)
Date: 19 Mar 2007 09:00:47 -0700
Subject: Boost Python properties/getter functions for strings
In-Reply-To: <1174312916.127830.303550@o5g2000hsb.googlegroups.com>
References: <1174312916.127830.303550@o5g2000hsb.googlegroups.com>
Message-ID: <1174320047.732767.101930@e65g2000hsc.googlegroups.com>

I forgot to mention, getname is defined as:
const std::string &Entity::getName() const;



From python at rcn.com  Sat Mar 10 03:39:44 2007
From: python at rcn.com (Raymond Hettinger)
Date: 10 Mar 2007 00:39:44 -0800
Subject: number generator
In-Reply-To: <pan.2007.03.09.15.32.01.112493@gmx.net>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
Message-ID: <1173515984.515050.27400@n33g2000cwc.googlegroups.com>

On Mar 9, 7:32 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <1173453432.893222.308... at j27g2000cwj.googlegroups.com>, cesco wrote:
> > Given two positive integers, N and M with N < M, I have to generate N
> > positive integers such that sum(N)=M. No more constraints.
>
> Break it into subproblems.  Generate a random number X from a suitable
> range and you are left with one number, and the problem to generate (N-1)
> random numbers that add up to (M-X).

This approach skews the probabilities.  The OP said for example with
N=5 and M=50 that a possible solution is [3, 11, 7, 22, 7].  You're
approach biases the probabilities toward solutions that have a large
entry in the first position.

To make the solutions equi-probable, a simple approach is to
recursively enumerate all possibilities and then choose one of them
with random.choice().


Raymond



From inq1ltd at verizon.net  Thu Mar 22 16:37:15 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Thu, 22 Mar 2007 16:37:15 -0400
Subject: What is the best way to upgrade python?
In-Reply-To: <etukqc$25k$2@sea.gmane.org>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
	<etukqc$25k$2@sea.gmane.org>
Message-ID: <200703221637.15574.inq1ltd@verizon.net>

On Thursday 22 March 2007 15:18, Facundo Batista 
wrote:
> yinglcs at gmail.com wrote:
> > i am using red hat enterprise 4. It has
> > python 2.3 installed. What is the best way to
> > upgrade to python 2.4?
> >
> > I think one way is to compile python 2.4 from
> > the source, but I can't remove the old one
> > since when i do 'rpm -e python', i get error
> > like 'failed dependencies'.
>
> Install Py2.4 and actually start using it, are
> two different animals.
>
> For example, I have installed Py2.4 and Py2.5
> in my laptop. They coexist, and there's no
> problem about this.
>
> Telling all your installed applications to use
> the newer, it's not so easy, mainly because you
> don't have the power to test and change every
> installed application.
>
> So let them be. Just install the new version,
> and use it.
>
> Regards,
>
> --
> .   Facundo
> .
> Blog: http://www.taniquetil.com.ar/plog/
> PyAr: http://www.python.org/ar/


I recently installed py 2.5 and I used the local 
user option. Now I build programs on 2.5 but I 
left the system with the original 2.4? since it 
worked just fine.  

Look in the instructions on how to build for local 
users and you 'll save yourself from encountering 
the unexpected.


jim-on-linux
http://www.inqvista.com





















From martinunsal at gmail.com  Tue Mar  6 13:30:03 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 10:30:03 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4724.1173202470.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
	<1173199320.094675.58350@p10g2000cwp.googlegroups.com>
	<mailman.4722.1173200207.32031.python-list@python.org>
	<1173201871.742845.84040@t69g2000cwt.googlegroups.com>
	<mailman.4724.1173202470.32031.python-list@python.org>
Message-ID: <1173205801.346941.201060@8g2000cwh.googlegroups.com>

On Mar 6, 9:34 am, "Chris Mellon" <arka... at gmail.com> wrote:
> It assumes that util.common is a module thats on the PYTHONPATH.

Now we're getting somewhere. :)

> The common way to ensure that this is the case is either to handle
> util as a separate project, and install it into the system
> site-packages just as you would any third party package,

This breaks if you ever need to test more than one branch of the same
code base. I use a release branch and a development branch. Only the
release branch goes into site-packages, but obviously I do most of my
work in the development branch.

> or to have it
> (and all your other application packages and modules) off a single
> root which is where your your application "base" scripts live.

This has SERIOUS scaling problems.

> This, and other intra-package import issues are affected by the
> relative/absolute import changes that were begun in Python 2.5, you
> can read about them here:http://www.python.org/dev/peps/pep-0328/

Awesome! Thanks. I'll take a look.

> Note that using relative imports to import a package that "happens" to
> be share a common higher level directory would be frowned upon.

What if it shares a common higher level directory by design? :)

Relative imports aren't ideal, but I think in some cases it's better
than relying on PYTHONPATH which is global state (an environment
variable no less).

Martin



From paul at subsignal.org  Fri Mar 16 10:51:32 2007
From: paul at subsignal.org (paul)
Date: Fri, 16 Mar 2007 15:51:32 +0100
Subject: Mastering Python
In-Reply-To: <1174052358.486071.163280@e65g2000hsc.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
Message-ID: <eteath$riu$1@sea.gmane.org>

Paul McGuire schrieb:
> What does Python have that C++ doesn't?
> - The biggie: dynamic typing (sometimes called "duck typing").
> Dynamic typing is a huge simplifier for development:
>   . no variable declarations
>   . no method type signatures
>   . no interface definitions needed
>   . no templating for collections
>   . no method overloading by differing argument type signatures
> ("Imagine there's no data types - I wonder if you can...").  What? No
> static type-checking at compile time?  Nope, not really.  If your
> method expects an object of type X, use it like an X.  If it's not an
> X, you may be surprised how often this is not a problem.
But sometimes it is ;) Typical example: input and CGI/whatever. If one
element is checked you'll get a string, if you select multiple (i.e.
checkboxes) you'll get a list. Both support iteration

Now if you iterate over the result:

case 1, input -> "value1":
for elem in input:
  #in real life we might validate here...
  print elem

-> 'v' 'a' 'l' 'u' 'e' '1'

case 2, input -> ["value1", "value2"]
for elem in input:
  print elem

-> "value1" "value2"

cheers
 Paul

Disclaimer: I like python and I write tests but i wish unittest had
class/module level setUp()...








From hitesh287 at gmail.com  Mon Mar  5 11:45:25 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 5 Mar 2007 08:45:25 -0800
Subject: MS SQL Database connection
In-Reply-To: <mailman.4671.1173087790.32031.python-list@python.org>
References: <1173047639.166841.301030@h3g2000cwc.googlegroups.com>
	<mailman.4671.1173087790.32031.python-list@python.org>
Message-ID: <1173113121.556667.81190@t69g2000cwt.googlegroups.com>


On Mar 5, 4:44 am, Tim Golden <m... at timgolden.me.uk> wrote:
> Hitesh wrote:
> > Hi currently I am using DNS and ODBC to connect to MS SQL database.
> > Is there any other non-dns way to connect? If I want to run my script
> > from different server  I first have to create the DNS in win2k3.
>
> Here are several ways to connect to an MSSQL database w/o
> having to create "DNS" or anything else in win2k3 ;)
>
> There are other ways (the slightly stale MSSQL module
> from Object Craft, for example, which still works fine
> for Python <= 2.3).
>
> TJG
>
> <code>
> def adodbapi_connection (server, database, username, password):
>    #
>    #http://adodbapi.sf.net
>    #
>    import adodbapi
>    connectors = ["Provider=SQLOLEDB"]
>    connectors.append ("Data Source=%s" % server)
>    connectors.append ("Initial Catalog=%s" % database)
>    if username:
>        connectors.append ("User Id=%s" % username)
>        connectors.append ("Password=%s" % password)
>    else:
>        connectors.append("Integrated Security=SSPI")
>    return adodbapi.connect (";".join (connectors))
>
> def pymssql_connection (server, database, username, password):
>    #
>    #http://pymssql.sf.net
>    #
>    import pymssql
>    if not username:
>      raise RuntimeError, "Unable to use NT authentication for pymssql"
>    return pymssql.connect (user=username, password=password,
> host=server, database=database)
>
> def pyodbc_connection (server, database, username, password):
>    #
>    #http://pyodbc.sf.net
>    #
>    import pyodbc
>    connectors = ["Driver={SQL Server}"]
>    connectors.append ("Server=%s" % server)
>    connectors.append ("Database=%s" % database)
>    if username:
>        connectors.append ("UID=%s" % username)
>        connectors.append ("PWD=%s" % password)
>    else:
>        connectors.append ("TrustedConnection=Yes")
>    return pyodbc.connect (";".join (connectors))
>
> </code>


Thank you.
And I yes I meant DSN not DNS (my mistake, thank you for catching
it ;)

hj





From jjl at pobox.com  Fri Mar 30 20:11:24 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 31 Mar 2007 00:11:24 GMT
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
Message-ID: <87mz1ui85v.fsf@pobox.com>

hg <hg at nospam.org> writes:

> Hi,
> 
> I'v been facing some very strange errors lately:
> 
> one example:
> 
> def __init__(self):
> ....
>         import my_info
>         some_text = my_info.T_SOME_TEXT
>                                       ^ syntax error
> 
> 
> I manage to get rid of that one by moving the import on top of my file.
> 
> Note: Python 2.4.1 under Windows
> 
> 
> Any clue ?

Do you have an encoding declaration in that file?  IIRC 2.4.1 gave
spurious syntax errors in some cases with files having coding
declarations.


John


From sturlamolden at yahoo.no  Thu Mar 15 18:29:37 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 15 Mar 2007 15:29:37 -0700
Subject: what are Python equivalent to MATLAB persistent or C++ static?
In-Reply-To: <1173942572.130747.228410@l77g2000hsb.googlegroups.com>
References: <1173942572.130747.228410@l77g2000hsb.googlegroups.com>
Message-ID: <1173997776.913948.272270@n76g2000hsh.googlegroups.com>

On Mar 15, 8:09 am, "dmitrey" <open... at ukr.net> wrote:
> Thank you in advance,
> Dmitrey

First, "static" can mean at least three different things in C++:

static int myvar1;

void foobar() {
   static int myvar2;
}

class foobar {
   static int myvar3;
}

I assume you are thinking about the second case above - a static
variable inside a function. You can achieve this by binding an
attribute to the function, use a closure, or declare a class
callable.

def foobar1():
   if not 'mystatic' in dir(foobar): foobar.mystatic = 0
   foobar.mystatic += 1
   return foobar.mystatic

def foobar2():
   mystatic = 0
   def closure():
      mystatic += 1
      return mystatic
   return closure

class foobar3:
   mystatic = 0
   def __call__():
      foobar.mystatic += 1
      return foobar.mystatic

Usage:

for i in xrange(0,10): print foobar1()

myclosure = foobar2()
for i in xrange(0,10): print myclosure()

myfoobar3 = foobar3()
for i in xrange(0,10): print myfoobar3()











From DustanGroups at gmail.com  Sat Mar 17 12:31:01 2007
From: DustanGroups at gmail.com (Dustan)
Date: 17 Mar 2007 09:31:01 -0700
Subject: Private data
Message-ID: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>

http://dustangroups.googlepages.com/privateattributesinpython

This is something that I just threw together this morning, after a
eureka moment. It's a way of creating private class attributes and
static function variables (I'm not 100% sure if that's the correct
terminology, but you get what I mean). I haven't tried to create
private instance attributes, mainly because it would just be too
difficult, and it would be awful syntax. I'm not considering actually
using this, but I do have a couple questions about it.

1. Has anyone else ever come up with something like this? I can't
imagine I'm the only person who's ever thought of this.
2. Is it possible to hack into something like this? ie, would it be
possible to see and change these variables from client code (assuming
the data manager has been properly removed from sight, as shown on the
last line of class block TestPrivateClassAttributes)?

To avoid utter confusion, you may want to look at
TestPrivateClassAttributes before looking at the actual implementation
of PrivateDataEngine. If you're still confused, feel free to ask
what's going on here (and I'm open to suggestions on how to make it
clearer).



From sjdevnull at yahoo.com  Thu Mar 15 12:47:19 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 15 Mar 2007 09:47:19 -0700
Subject: what are Python equivalent to MATLAB persistent or C++ static?
In-Reply-To: <pan.2007.03.15.09.15.21.389810@gmx.net>
References: <1173942572.130747.228410@l77g2000hsb.googlegroups.com>
	<pan.2007.03.15.09.15.21.389810@gmx.net>
Message-ID: <1173977239.736622.46800@y80g2000hsf.googlegroups.com>

Marc 'BlackJack' Rintsch wrote:
> In <1173942572.130747.228410 at l77g2000hsb.googlegroups.com>, dmitrey wrote:
>
> > Thank you in advance,
>
> For what?  Hint: Don't "hide" the question in the subject line.
>
> I don't know MATLAB's `persistent` but I know that ``static`` in C++ can
> be used in different places with different meanings.
>
> It seems you are asking questions how to translate some constructs from
> other languages 1:1 into Python.  Without context this may lead you to
> programming some other language in Python, resulting in fighting the
> language because you don't use "pythonic" idioms to solve your problems.
>
> C++-static function's names on module level should start with an
> underscore:
>
> def _i_am_not_meant_to_be_public():
>     pass
>
> It's a naming convention for things that are considered internal.
>
> C++-static class members are class attributes in Python:
>
> class Spam(object):
>     i_am_a_class_attribute = 42
>
>     def __init__(self):
>         self.i_am_an_instance_attribute = 'Viking'
>
> And C++static local variables don't exist in Python.  There are ways to
> emulate them with mutable default arguments, but that's at least
> debatable.  Use a class instead.

If you must, function attributes emulate static:
def  myfunc():
   myfunc.foo += 1
    return myfunc.foo
myfunc.foo=0 #initialize the value near the function definition

>>> print  myfunc()
1
>>> print  myfunc()
2
etc

But it's usually a bad idea to use this.  function attributes are
better reserved for information about the function itself (similar to
docstrings).



From aspineux at gmail.com  Sun Mar 18 08:40:40 2007
From: aspineux at gmail.com (aspineux)
Date: 18 Mar 2007 05:40:40 -0700
Subject: Automagically log changes in table
In-Reply-To: <1174188025.545923.272900@l77g2000hsb.googlegroups.com>
References: <1174164187.257094.236020@l75g2000hse.googlegroups.com>
	<1174175976.156270.65830@e1g2000hsg.googlegroups.com>
	<1174188025.545923.272900@l77g2000hsb.googlegroups.com>
Message-ID: <1174221640.893852.240810@l75g2000hse.googlegroups.com>

On 18 mar, 04:20, "George Sakkis" <george.sak... at gmail.com> wrote:
> On Mar 17, 7:59 pm, "aspineux" <aspin... at gmail.com> wrote:
>
> > Hi
>
> > You can get this using "triggers" and "stored procedures".
> > These are SQL engine dependent! This is available for long time with
> > postgress and only from version 5 with mysql.
> > This let you write SQL code (Procedure) that will be called when
> > "trigged" by an event like inserting new row, updating rows,
> > deleting ....
>
> I'd rather avoid triggers since I may have to deal with Mysql 4. Apart
> from that, how can a trigger know the current user ?

Because each user opening an web session will login to the SQL
database using it's own
login. That way you will be able to manage security at DB too. And the
trigger
will use the userid of the SQL session.

> This information
> is part of the context (e.g. an http request), not stored persistently
> somewhere. It should be doable at the framework/orm level but I'm
> rather green on Turbogears/SQLAlchemy.
>
> George

Maybe it will be easier to manage this in your web application.

it's not too dificulte to replace any

UPDATE persone
SET name = %{new_name}s
WHERE persone_id=%{personeid}

by something like

UPDATE persone
SET name = %{new_name}s, modified_by=%{user_id}s, modified_time=%
{now}s
WHERE persone_id=%{personeid}

BR



From kadarlakiran at yahoo.com  Thu Mar 22 01:21:19 2007
From: kadarlakiran at yahoo.com (kadarla kiran kumar)
Date: Wed, 21 Mar 2007 22:21:19 -0700 (PDT)
Subject: copying only recent files from one machine to another
Message-ID: <794394.60913.qm@web38815.mail.mud.yahoo.com>

Hi Everybody,
   
  Iam trying to copy files from one machine to another over SFTP connection. For that Iam using sftp.get & sftp.put methods.
   
  Now, I have to copy only recently created/modified files,i.e, based on timestamps from remote machine to my machine. Is there any standard implementation for that in python/paramiko ? If not , can anyone suggest me the efficient method to implement the same.
   
  Thanks in Advance,
  Kiran Kumar 

 
---------------------------------
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From aahz at pythoncraft.com  Wed Mar 28 18:51:58 2007
From: aahz at pythoncraft.com (Aahz)
Date: 28 Mar 2007 15:51:58 -0700
Subject: how can I clear a dictionary in python
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
Message-ID: <euerie$c7$1@panix3.panix.com>

In article <4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d at comcast.com>,
Larry Bates  <lbates at websafe.com> wrote:
>Marko.Cain.23 at gmail.com wrote:
>> 
>> I create a dictionary like this
>> myDict = {}
>> 
>> and I add entry like this:
>> myDict['a'] = 1
>> but how can I empty the whole dictionary?
>
>just point myDict to an empty dictionary again
>
>myDict={}

Go back and read Christian's post, then post a followup explaning why his
solution is better than yours.  Your explanation should use id().
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Need a book?  Use your library!


From marco at waven.com  Tue Mar 13 00:18:38 2007
From: marco at waven.com (Marco)
Date: Tue, 13 Mar 2007 12:18:38 +0800
Subject: how to set different TCP_KEEPALIVE parameters for different
	socket ?
In-Reply-To: <5c62a320703122058s5a333e41h3b810241841beab3@mail.gmail.com>
References: <5c62a320703122058s5a333e41h3b810241841beab3@mail.gmail.com>
Message-ID: <5c62a320703122118w75b77e89m8004ef2ab57e9e73@mail.gmail.com>

Oh, I see,

sd.getsockopt(SOL_TCP, TCP_*)

On 3/13/07, Marco <marco at waven.com> wrote:
> Hi,
>
> I can use sd.setsockopt() to enable the socket use TCP keepalive
> feature, but how to set a different parameters(interval, probes and
> time) for it?
> Sure, I can modify /proc/sys/net/ipv4/tcp_* , but need root password
> and will affect other program.
>
> Thank you!
>
>
> --
> LinuX Power
>


-- 
LinuX Power


From kyosohma at gmail.com  Mon Mar 26 12:17:35 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 09:17:35 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
Message-ID: <1174925855.552135.228190@n59g2000hsh.googlegroups.com>

On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
> I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> I skip over these widgets when using the tab key?
>
> Thank you,
> John

I would probably write some custom event handling. Something that
could tell it was a key-press event and not just an on-focus event.
Then it would be a simple, if key-press == tab, put focus on next
widget of interest. Something like that should work.

Mike



From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 12:23:55 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 03:23:55 +1100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
Message-ID: <pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 06:36:16 -0700, flit wrote:

> 1 - There is a way to make some program in python and protects it? I
> am not talking about ultra hard-core protection, just a simple one
> that will stop 90% script kiddies.

Protect it from what? Viruses? Terrorists? The corrupt government? Your
ex-wife cutting it up with scissors? People who want to copy it? People
who will look at your code and laugh at you for being a bad programmer?

Until you tell us what you are trying to protect against, your question
is meaningless.

Is your program valuable? Is it worth money? Then the 90% of script
kiddies will just wait three days, and download the program off the
Internet after the real hackers have broken your protection.

If it is NOT valuable, then why on earth do you think people will put up
with whatever "protection" you use? Why won't they just use another
program?


> 2 - If I put the code in web like a web service, how can I protect my
> code from being ripped? There is a way to avoid someone using my site
> and ripping the .py files?

Don't make the .py files available on the web server.

[penny drops]

Hang on, you want us to believe that you're a serious computer programmer
with a seriously valuable program that's worth "protecting", and you don't
know that? I smell a troll.


-- 
Steven.



From cpblPublic at gmail.com  Thu Mar  8 00:09:40 2007
From: cpblPublic at gmail.com (C Barr Leigh)
Date: 7 Mar 2007 21:09:40 -0800
Subject: Bug in python!? persistent value of an optional parameter in
	function!
In-Reply-To: <7xejo0bbpe.fsf@ruckus.brouhaha.com>
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
	<pan.2007.03.08.04.07.49.661894@REMOVEME.cybersource.com.au>
	<7xejo0bbpe.fsf@ruckus.brouhaha.com>
Message-ID: <1173330580.407435.288390@64g2000cwx.googlegroups.com>

Oh, oops! Of course...  :)  A great and sensible feature if you're
expecting it.
Thanks very much, everyone, for the links and discussion!

Chris



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  1 04:44:48 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 01 Mar 2007 10:44:48 +0100
Subject: class declaration shortcut
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
Message-ID: <54nlkgF21ft8aU3@mid.individual.net>

Michele Simionato wrote:
> On Mar 1, 9:40 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net>
>> In <54msaoF21c6h... at mid.individual.net>, Bjoern Schliessmann

>>> But what's it (__name__) good for?
>>
>> As objects don't know to which name they are bound, that's a good
>> way to give some information in stack traces or when doing
>> introspection.
> 
> Also, the name is used by pickle to find the class of pickled
> instances.

Mh. I suspect there's also more to it than I see now, but this
__name__ seems quite useless to me. What if I rebind the class'
name after definition? Or is it really just for some manual
introspection? If it is, it seems a bit of an overkill to me.

>>> class Spam(object):
...     pass
... 
>>> Ham = Spam
>>> Spam = 0
>>> test = Ham()
>>> test.__class__
<class '__main__.Spam'>
>>> test.__class__.__name__
'Spam'
>>> Spam
0
>>> 

Regards,


Bj?rn

-- 
BOFH excuse #137:

User was distributing pornography on server; system seized by FBI.



From aleax at mac.com  Sat Mar  3 11:23:53 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 08:23:53 -0800
Subject: print a ... z, A ... Z, "\n"' in Python
References: <mailman.4623.1172909667.32031.python-list@python.org>
Message-ID: <1hue4db.1ifwnsjmhm2pN%aleax@mac.com>

js  <ebgssth at gmail.com> wrote:

> HI guys,
> 
> How do you write Perl's
> 
>     print a ... z, A ... Z,  "\n"' in Python
> 
> In Python?

This specific one is easy, though this doesn't generalize:

import string
print string.lowercase + string.uppercase

For the general case, there's no way to avoid calling chr and ord,
because a string in Python doesn't have a "natural successor". So the
only issue is how you prefer to hide those calls &c (in some class or
function) and you already received suggestions on that.


Alex


From gagsl-py2 at yahoo.com.ar  Thu Mar 15 16:14:19 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 17:14:19 -0300
Subject: Circular Class Logic
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
Message-ID: <op.to8yh5eux6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 Mar 2007 09:01:07 -0300, <half.italian at gmail.com> escribi?:

> I got it to work, but I had to add a check to see if the class
> variable had been set..
>  class Foo:
>   baz = None
>   def __init__(self):
>     if Foo.baz == None:
>       Foo.baz = True
>       initBaz()

This is a different approach. You are using instance initialization  
(Foo.__init__) to finish class initialization. Foo.__init__ will be called  
each time you create a Foo instance; that's why you had to check if  
Foo.baz is None.
(BTW, Foo.baz=True is unneeded).
The only problem I can see is that the Foo class is not completely  
initialized until its first instance is created; this may not be a problem  
in your case.

> What exactly is being accomplished by having the init function outside
> of the class?  If there is no check, wouldn't it just execute every
> time an object is instantiated anyway?

What I intended was different:

==========
C:\TEMP>type foo.py
class Foo:
         baz = None

         def __init__(self):
                 pass

def initFoo():
         import baz
         Foo.baz = baz.Baz()
initFoo()

C:\TEMP>type bar.py
import foo

class Bar(foo.Foo):
         pass

C:\TEMP>type baz.py
import bar

class Baz(bar.Bar):
         pass

C:\TEMP>type test.py
import foo,bar,baz

print foo.Foo.baz
f = foo.Foo()
print f.baz
b = bar.Bar()
print b.baz
print baz.Baz.baz

C:\TEMP>python test.py
<baz.Baz instance at 0x00AD7B20>
<baz.Baz instance at 0x00AD7B20>
<baz.Baz instance at 0x00AD7B20>
<baz.Baz instance at 0x00AD7B20>
==========

initFoo is only executed when Foo is imported the first time. Note that  
you can't do that if

> I thought it was a good design, but now I'm not so sure.  I'm
> untrained, so often I dont know the right way to do things.  As I
> build this into the libraries, I'll keep an eye on how the code is
> developing and go from there.    Thanks for the help!

Usually Python code is quite concise and straightforward; when I find  
myself writing things too convoluted, I know it's time to  
refactor/redesign. (Anyway some things remain not as simple as I'd like  
:( )
Perhaps you later find the need for a different/better way.

--
Gabriel Genellina



From claird at lairds.us  Mon Mar 26 11:33:44 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 Mar 2007 15:33:44 +0000
Subject: call to function by text variable
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
	<mailman.5604.1174863631.32031.python-list@python.org>
	<qrujd4-s5u.ln1@lairds.us>
	<mailman.5612.1174891359.32031.python-list@python.org>
Message-ID: <on5ld4-qrv.ln1@lairds.us>

In article <mailman.5612.1174891359.32031.python-list at python.org>,
Steve Holden  <steve at holdenweb.com> wrote:
>Cameron Laird wrote:
>> In article <mailman.5604.1174863631.32031.python-list at python.org>,
>> Jan Schilleman <jan.schilleman at xs4all.nl> wrote:
>>> Hi,
>>>
>>> try this:
>>> func = getattr(operations, ["Replace", "ChangeCase", "Move"][n])
>>>
>>> HTH,
>>> Jan
>>>
>>> "ianar?" <ianare at gmail.com> schreef in bericht 
>>> news:1174862186.134912.117270 at p15g2000hsd.googlegroups.com...
>>>> yeah the subject doesn't really make sense does it?
>>>>
>>>> anyway want I want to do is this:
>>>> if n == 1:
>>>>
>>>>    self.operations.insert(pos, operations.Replace.Panel(self, main))
>> 			.
>> 			.
>> 			.
>> I think you meant "...[n - 1]" rather than "...[n]".
>> 
>> I'm a tiny bit surprised no one has organized this in terms
>> of a dictionary.  I don't know, of course, how robust is the
>> characterization of n as a small integer.  Maybe
>> 
>>   lookup_table = {
>>       0: "Replace",
>>       1: "ChangeCase",
>>       2: "Move"}
>> 
>> captures the sentiment; maybe something else does it better.
>> 
>Surely for this requirement the *only* advantage of a dictionary over a 
>list is its ability to index with arbitrary values and thereby avoid the 
>need to use [n-1]. Wouldn't it therefore be less perverse to use
>
>     lookup_table = {
>       1: "Replace",
>       2: "ChangeCase",
>       3: "Move"}
>
>Of course the dictionary would be a big win if the integer choice values 
>weren't a linear sequence. Otherwise using a list with a fixed offset is 
>likely to be quicker.
			.
			.
			.
Ugh.  Yes.

Maybe your question, "Wouldn't it therefore be less perverse ...?",
was rhetorical.  I feel obliged to answer in public, though, rather
than sending the private e-mail I originally wrote, because I want
to leave no doubt in the minds of readers of this thread:  what I
wrote was wrong.  Yes, Steve's lookup_table binding (or assignment)
was what I had in mind all along, and entirely superior to what I
mistakenly wrote; my thanks to him.  He also elaborated the correct
detail:  "if the integer choice values weren't a linear sequence",
or if they weren't even integers, or ..., then the dictionary
suddenly becomes much more compelling.

Incidentally, a fair amount of Python code that looks like

    if n == 1:
	...
    elif n == 2:
	...

turns out, in my experience, to have been inherited from some other
language in such a way that it turns out n is not even the most 
natural or expressive determinant.  A fully idiomatic rewriting will
have a table where the keys are more-humanly-readable strings, rather
than small integers.


From bh at intevation.de  Fri Mar  2 12:31:43 2007
From: bh at intevation.de (Bernhard Herzog)
Date: Fri, 02 Mar 2007 18:31:43 +0100
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
Message-ID: <s9zslcna6ww.fsf@thoe.hq.intevation.de>

bayer.justin at googlemail.com writes:

> So, once I start the C Program from the shell, I immediately get its
> output in my terminal. If I start it from a subprocess in python and
> use python's sys.stdin/sys.stdout as the subprocess' stdout/stdin I
> also get it immediately.

If stdout is connected to a terminal, it's usually line buffered, so the
buffer is flushed whenever a newline is written.

> BUT If I use PIPE for both (so I can .write() on the stdin and .read()
> from the subprocess' stdout stream (better: file descriptor)) reading
> from the subprocess stdout blocks forever. If I write something onto
> the subprocess' stdin that causes it to somehow proceed, I can read
> from its stdout.

When stdout is not connected to a terminal, it's usually fully buffered,
so that nothing is actually written to the file until the buffer
overflows or until it's explictly flushed.

If you can modify the C program, you could force its stdout stream to be
line buffered.  Alternatively, you could call fflush on stdout whenever
you're about to read from stdin.  If you can't modify the C program you
may have to resort to e.g. pseudo ttys to trick it into believing that
its stdout is a terminal.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Skencil                                           http://skencil.org/
Thuban                                  http://thuban.intevation.org/


From nagle at animats.com  Thu Mar 15 20:12:46 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 15 Mar 2007 17:12:46 -0700
Subject: "urlopen" not thread safe
Message-ID: <iilKh.4929$tv6.1894@newssvr19.news.prodigy.net>

    I was looking at the code for "urllib", and there's
some undocumented "FTP cacheing" code in there that's not thread safe.
The documentation for "urllib"

    Is there any good reason to keep that code in "urllib"?
Unless something critical uses that undocumented feature,
that code probably ought to come out.  Comments?

				John Nagle


From jstroud at mbi.ucla.edu  Sun Mar 25 08:03:25 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 25 Mar 2007 12:03:25 GMT
Subject: Tkinter Toplevel geometry
In-Reply-To: <0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
	<0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>
Message-ID: <hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>

James Stroud wrote:
> Chris wrote:
>> Hi,
>>
>> If a user resizes a Toplevel window, or I set a Toplevel's geometry
>> using the geometry() method*, is there any way to have the geometry
>> reset to that required for all the widgets?
>>
>> I think I found what I'm looking for in tk itself:
>> """
>> 13.3. How can I clear the geometry settings for a toplevel?
>> If you want to have Tk resize your toplevel to what the toplevel
>> requires (ie: the user might have resized it, or a widget was
>> removed), use [wm geometry $toplevel].
>> """
>> [from http://tcl.sourceforge.net/faqs/tk/]
>>
>>
>>
>> * for instance, if I want to turn of Tkinter's automatic adjustment of
>> the window to fit all the widgets by doing something like
>> self.geometry(self.geometry()), is there any way to undo that?
>>
>> Thanks,
>> Chris
>>
> 
> Hi Chris,
> 
> I think you are on to something. The equivalent of
> 
>    [wm geometry $toplevel]
> 
> in Tkinter would be
> 
>    sometop.geometry()
> 
> Or, equivalently,
> 
>    sometop.wm_geometry()
> 
> Or, calling the underlying tcl/tk interpreter directly
> 
>    sometop.tk.call('wm', 'geometry', str(sometop))
> 
> Which is redundant, but emphasizes the point: This does not resize the
> widget as expected nor does it cause the window to resize upon adding 
> new packing slaves--at least for the X11 based Tkinter for mac via the 
> fink debian based package manager.
> 
> Really wish things worked according to the docs a lot of the time or 
> that they weren't so poorly written. Perhaps they are implying that you 
> must pass parameters, however they do not explain how one might generate 
> said parameters to get the required size to which they allude. Terribly 
> disappointing.
> 
> James

After playing with this an inordinate amount of time, I found that one 
does need to supply parameters, namely the null parameter of an empty 
string. Try:

   sometop.geometry('')

This repacks according to the widgets. Not quite clear from the 
miserable docs, is it?

James


From http  Sat Mar 10 21:12:12 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 18:12:12 -0800
Subject: How to test if a key in a dictionary exists?
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
	<1173578899.046177.104890@j27g2000cwj.googlegroups.com>
Message-ID: <7x6498le9v.fsf@ruckus.brouhaha.com>

> if hist.has_key(outcome):
>     hist[outcome] += 1  # if key already exists, increment
> else:
>     hist[outcome] = 1   # else create a new key

You could write that:

   hist[outcome] = 1 + hist.get(outcome, 0)

Or with Python 2.5 you could use

   hist = defaultdict(int)
   ...
   hist[outcome] += 1  # automatically initializes to 0 if outcome not found


From steve at REMOVE.THIS.cybersource.com.au  Mon Mar 26 19:30:58 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 27 Mar 2007 09:30:58 +1000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
	<1174929184.645992.61310@y66g2000hsf.googlegroups.com>
	<1174949636.284743.251680@n59g2000hsh.googlegroups.com>
Message-ID: <pan.2007.03.26.23.30.57.405515@REMOVE.THIS.cybersource.com.au>

On Mon, 26 Mar 2007 15:53:56 -0700, sturlamolden wrote:

> Python is a very high-level language. That means there are certain
> things that put constraint on the attained speed. Most importantly:
> keep the number of interpreter evals as scarce as possible. If you
> make a for loop, the interpreter may evaluate the lines within the
> loop several times. Languages like C, C++ and Java really teach you
> bad habits when it comes to an interpreted language like Python. In
> these languages, loops are almost free. In Python, they may be very
> expensive as the interpreter is invoked multiple times.

Jeez-Louise, this is why my blood boils when I read ignora^H^H^H^H
misguided people referring to Python as "interpreted": it leads other
people to imagine that Python is interpreting lines over and over and over
again.

Is the interpreter invoked multiple times in a for loop? Let's find out.

Here is a function with a for loop:

def looper():
    x = 1
    for i in range(1000000):
        print x
        x += i
    return x


Let's look at the compiled code:

>>> dis.dis(looper)
  2           0 LOAD_CONST               1 (1)
              3 STORE_FAST               0 (x)

  3           6 SETUP_LOOP              35 (to 44)
              9 LOAD_GLOBAL              0 (range)
             12 LOAD_CONST               2 (1000000)
             15 CALL_FUNCTION            1
             18 GET_ITER
        >>   19 FOR_ITER                21 (to 43)
             22 STORE_FAST               1 (i)

  4          25 LOAD_FAST                0 (x)
             28 PRINT_ITEM
             29 PRINT_NEWLINE

  5          30 LOAD_FAST                0 (x)
             33 LOAD_FAST                1 (i)
             36 INPLACE_ADD
             37 STORE_FAST               0 (x)
             40 JUMP_ABSOLUTE           19
        >>   43 POP_BLOCK

  6     >>   44 LOAD_FAST                0 (x)
             47 RETURN_VALUE

Certainly Python isn't interpreting the lines in the for loop one million
times. It interprets them once, compiles them once, and executes them one
million times.


> But if you can
> 'vectorize' the loop statement into a one-liner (or a few lines) using
> slicing, list comprehensions or functional programming (e.g. the
> lambda, map and filter intrinsics), the overhead will be very small.

This is generally good advice because it moves the loop from
moderately fast Python code to very fast C code, not because Python is
interpreting each line over and over again.


-- 
Steven.



From gagsl-py2 at yahoo.com.ar  Tue Mar 13 17:31:10 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 18:31:10 -0300
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<1173813714.767225.164790@q40g2000cwq.googlegroups.com>
	<7xird5ndey.fsf@ruckus.brouhaha.com>
	<1173817193.179354.235790@p15g2000hsd.googlegroups.com>
Message-ID: <op.to5cp8cux6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 17:19:53 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribi?:

> On Mar 13, 7:36 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>>
>> The re library caches the compiled regexp, I think.
>
> That would surprise me.
> How can re.search know that string.lower(search) is the same each
> time?  Or else there is something that I misunderstand.

It does.

py> import re
py> x = re.compile("ijk")
py> y = re.compile("ijk")
py> x is y
True

Both, separate calls, returned identical results. You can show the cache:

py> re._cache
{(<type 'str'>, '%(?:\\((?P<key>.*?)\\))?(?P<modifiers>[-#0-9  
+*.hlL]*?)[eEfFgGd
iouxXcrs%]', 0): <_sre.SRE_Pattern object at 0x00A786A0>,
  (<type 'str'>, 'ijk', 0): <_sre.SRE_Pattern object at 0x00ABB338>}

-- 
Gabriel Genellina



From nagle at animats.com  Fri Mar 30 18:38:40 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 30 Mar 2007 15:38:40 -0700
Subject: Cheeseshop needs mirrors
In-Reply-To: <460d874b$0$5746$afc38c87@news.optusnet.com.au>
References: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>
	<1175249588.897793.24450@o5g2000hsb.googlegroups.com>
	<460d874b$0$5746$afc38c87@news.optusnet.com.au>
Message-ID: <xjgPh.1829$H_5.312@newssvr23.news.prodigy.net>

Richard Jones wrote:
> And of course I'll reiterate the same line I always do: the Cheese Shop was
> set up by a volunteer, enhanced by some other volunteers and exactly
> nothing more will get done unless more volunteers offer their time.

     Yup.  That's why CPAN is so much better.  Ook!

				John Nagle


From lbates at websafe.com  Thu Mar 29 09:16:26 2007
From: lbates at websafe.com (Larry Bates)
Date: Thu, 29 Mar 2007 08:16:26 -0500
Subject: how can I clear a dictionary in python
In-Reply-To: <euerie$c7$1@panix3.panix.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com>
Message-ID: <KP-dnXOp7ea8IZbbnZ2dnUVZ_oCmnZ2d@comcast.com>

Aahz wrote:
> In article <4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d at comcast.com>,
> Larry Bates  <lbates at websafe.com> wrote:
>> Marko.Cain.23 at gmail.com wrote:
>>> I create a dictionary like this
>>> myDict = {}
>>>
>>> and I add entry like this:
>>> myDict['a'] = 1
>>> but how can I empty the whole dictionary?
>> just point myDict to an empty dictionary again
>>
>> myDict={}
> 
> Go back and read Christian's post, then post a followup explaning why his
> solution is better than yours.  Your explanation should use id().

I believe he (as many new to Python do) are mired in old
programming thinking that variables "contain" things.
As I'm sure you kno, variables point to things in Python.
I don't believe that there are lots of other objects
pointing to this dictionary.  Perhaps the OP can clarify
for us.  If there aren't other objects pointing to
this dictionary it would make NO sense to iterate over a
dictionary and delete all the keys/values so I tried to read
between the lines and answer what I believe the OP thought he
was asking.  BTW-I didn't see you posting an answer to what
you thought was the "correct" question, just criticizing me
for taking the time to answer what I perceived the OP was
asking.

-Larry


From durumdara at gmail.com  Fri Mar 30 04:14:37 2007
From: durumdara at gmail.com (Durumdara)
Date: Fri, 30 Mar 2007 10:14:37 +0200
Subject: Is any way to split zip archive to sections?
Message-ID: <9e384ef60703300114p534ec835wa707ce2292e1dfbb@mail.gmail.com>

Hi!

I want to create some backup archives with python (I want to write a backup
application in Python).
Some package managers (7z, arj, winzip) can create splitted archives (1
mega, 650, 700 mega, etc).

Because I want to ftp these results to a ftp server, I want to split large
volumes to 15 mb sections.

Can I do it with any python wrapper automatically (like in Cobian), or I
need to create the large volume, and next split it with another tool?

Or anybody knows about a command line tool (like 7z, or arj) that can expand
the splitted archive (and I can add files with them from Python one by one)?

So what is the solution?

Thanks for your help:
dd
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From irstas at gmail.com  Sun Mar 25 05:00:27 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 25 Mar 2007 02:00:27 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174803233.118069.234290@l75g2000hse.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
Message-ID: <1174813227.275145.211000@o5g2000hsb.googlegroups.com>

On Mar 25, 9:13 am, "7stud" <bbxx789_0... at yahoo.com> wrote:
> MyClass.someFunc
>
> Is there some other way to retrieve a user-defined function object
> from a class other than using the class name or an instance?

What Steven B. already said, MyClass.__dict__['someFunc'], is a
different way than MyClass.someFunc that produces different results.
Since the method is an attribute of a class, what other kinds of means
are you expecting to be possible?

You can use reflection to dig up MyClass-object from the module
dictionary if referring to object or class by name in the code is
something you want to get rid of.



From skip at pobox.com  Fri Mar 16 09:00:12 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 16 Mar 2007 08:00:12 -0500
Subject: CSV module and "fileobj"
In-Reply-To: <1174042670.829441.286490@n59g2000hsh.googlegroups.com>
References: <1174042670.829441.286490@n59g2000hsh.googlegroups.com>
Message-ID: <17914.38108.680389.937374@montanaro.dyndns.org>


    Jon> If I have a CSV reader that's passed to a function, is it possible
    Jon> for that function to retrieve a reference to the "fileobj" like
    Jon> object that was passed to the reader's __init__? 

Nope, that isn't exposed from the C type.

Skip


From roland.hedberg at adm.umu.se  Sun Mar 25 11:02:07 2007
From: roland.hedberg at adm.umu.se (Roland Hedberg)
Date: Sun, 25 Mar 2007 17:02:07 +0200
Subject: Other classes in a module
Message-ID: <46068EEF.6070000@adm.umu.se>

Hi!

Can an instance of a class in a module, in any simple way find out which
other classes that exists in said module ?

-- Roland


From paddy3118 at googlemail.com  Sat Mar 31 01:22:37 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 30 Mar 2007 22:22:37 -0700
Subject: Modal value of an array
In-Reply-To: <mailman.5795.1175289482.32031.python-list@python.org>
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
	<1hvpovd.1anin2by4gjl1N%aleax@mac.com>
	<1175208296.769865.186480@r56g2000hsd.googlegroups.com>
	<mailman.5795.1175289482.32031.python-list@python.org>
Message-ID: <1175318557.079267.94740@b75g2000hsg.googlegroups.com>

On Mar 30, 10:17 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Thu, 29 Mar 2007 19:44:56 -0300, Paddy <paddy3... at googlemail.com>
> escribi?:
>
> > On Mar 29, 8:49 am, a... at mac.com (Alex Martelli) wrote:
> >> >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> >> >>> max(foo, key=foo.count)
>
> >> 'spam'
>
> > This doesn't call foo.count for duplicate entries by keeping a cache
>
> >>>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> >>>> def cachecount(x, cache={}):
> > ...        return cache.setdefault(x, foo.count(x))
>
> Unfortunately it does, because all arguments are evaluated *before* a
> function call, so you gain nothing.
>
> --
> Gabriel Genellina

I had to experiment to find out what you meant but I finally got it.
that call to foo.count in the setdefault is *always* called. Forgive
my senility.

- Paddy.



From jjl at pobox.com  Wed Mar 21 18:11:38 2007
From: jjl at pobox.com (John J. Lee)
Date: Wed, 21 Mar 2007 22:11:38 GMT
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<mailman.5284.1174321784.32031.python-list@python.org>
	<1hv8wz8.19mj0kb1k9m2m8N%aleax@mac.com>
	<mailman.5330.1174386290.32031.python-list@python.org>
Message-ID: <87wt1atffg.fsf@pobox.com>

Steve Holden <steve at holdenweb.com> writes:

> Alex Martelli wrote:
> > BJ?rn Lindqvist <bjourne at gmail.com> wrote:
> >    ...
> >> even2 = [(pos, col) for pos, col in iterimage(im, width, height, 2)]
> > list(iterimage(etc etc))
> > is surely a better way to express identical semantics.  More
> > generally,
> > [x for x in whatever] (whether x is a single name or gets peculiarly
> > unpacked and repacked like here) is a good example of inappropriate LC,
> > to get back to the question in the subject: list(whatever) is the "one
> > obvious way" to perform the same task.
> >
> Clearly the comprehension you complain about is sub-optimal.
> 
> The essential difference, however, is between
> 
>    [x for x in iterimage(im, width, height, 2)]
> 
> and
> 
>    list(iterimage(im, width, height, 2))
> 
> I agree that the latter is the obvious way, but the difference isn't
> as large as your leap makes it look - and we had to await the
> invention of the generator expression for it to be a practical choice.

What generator expression?  I don't see a genexp in your examples.


John


From fabiofz at gmail.com  Thu Mar  1 06:22:21 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Thu, 1 Mar 2007 08:22:21 -0300
Subject: Pydev 1.2.8 Released
Message-ID: <cfb578b20703010322o42220db3lde02c3546ae38740@mail.gmail.com>

Hi All,

Pydev and Pydev Extensions 1.2.8 have been released

Details on Pydev Extensions: http://www.fabioz.com/pydev
Details on Pydev: http://pydev.sf.net
Details on its development: http://pydev.blogspot.com

Release Highlights in Pydev Extensions:
-----------------------------------------------------------------

 * Code-analysis: when a compare statement is found out of a test scope,
that's reported as a warning
 * Mark Occurrences: new option to choose whether strings and comments
should be highlighted
 * Simple Completions: some keywords were removed from the default list (the
2-letter ones because they're barely worth it and those related to 'try', as
there's already an assistant that creates 'try' blocks)
 * Rename refactoring / Mark Occurrences: matches in multi-line strings are
now correct


Release Highlights in Pydev:
----------------------------------------------

 * Refactoring: integration of the PEPTIC refactoring engine
 * Package Explorer: many fixes (special thanks for Don Taylor for the bug
reports)
 * Debugger: a number of small optimizations
 * Code-completion: works in emacs mode
 * Code-completion: added the possibility of auto-completing for all letter
chars and '_' (so, it starts completing once you start writing)
 * Code-completion: code-completion for epydoc inside strings
 * Code-completion: assigns after global statement considered added to the
global namespace
 * Code-completion: now works when a class is declared in a nested scope
 * Code-completion: if multiple assigns are found to some variable, the
completion will be a merge of them
 * Code-completion: functions are analyzed for their return values for
code-completion purposes
 * Code-completion: working on multi-line imports
 * Code-completion: can discover instance variables not declared in the
class (in the scope where the class was instanced)
 * Auto-edit: adds 'self', 'cls' or no parameter based on the @clasmethod,
@staticmethod declaration on previous line
 * Auto-edit: doesn't add 'self' if a method is declared in a method inner
scope
 * Fix: BRM Refactoring: wrong column was being passed to the BRM
refactoring engine
 * Code-folding: added for comments and strings
 * Fix: sometimes the 'create docstring' assistant was not recognizing
method definitons



What is PyDev?
---------------------------

PyDev is a plugin that enables users to use Eclipse for Python and Jython
development -- making Eclipse a first class Python IDE -- It comes with many
goodies such as code completion, syntax highlighting, syntax analysis,
refactor, debug and many others.


Cheers,

-- 
Fabio Zadrozny
------------------------------------------------------
Software Developer

ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br

Pydev Extensions
http://www.fabioz.com/pydev

Pydev - Python Development Enviroment for Eclipse
http://pydev.sf.net
http://pydev.blogspot.com
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From gagsl-py2 at yahoo.com.ar  Thu Mar  8 04:24:30 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 06:24:30 -0300
Subject: Howto find dict members from a list of keys
References: <esogs0$41a$1@online.de>
	<mailman.4790.1173342408.32031.python-list@python.org>
	<pan.2007.03.08.08.37.48.318909@REMOVEME.cybersource.com.au>
Message-ID: <op.tou5q4xcx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 05:37:48 -0300, Steven D'Aprano  
<steve at REMOVEME.cybersource.com.au> escribi?:

> On Thu, 08 Mar 2007 05:26:22 -0300, Gabriel Genellina wrote:
>
>> found_dic_members = [d[key] for key in l]
>
> *self stares at the line of code*
>
> *self thinks about what he just posted*
>
> *self realises with acute embarrassment that he's jumped to conclusions
> and completely misunderstood the Original Poster's question*
>
> Oops! I'll just be slinking away now...

LOL! :)

(...now! But when I saw your previous post, I had to check whether it was  
*me* who misunderstood the OP answering with a silly one-liner...)


-- 
Gabriel Genellina



From bj_666 at gmx.net  Mon Mar 19 12:15:18 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 19 Mar 2007 17:15:18 +0100
Subject: check if files are the same on Windows
References: <1174320587.618875.48290@y66g2000hsf.googlegroups.com>
Message-ID: <pan.2007.03.19.16.15.17.532938@gmx.net>

In <1174320587.618875.48290 at y66g2000hsf.googlegroups.com>, Beliavsky
wrote:

> [?] How should one check that files are the same in Python? The files
> are plain text.

Take a look at the `filecmp` module.  Pay attention to the shallow
argument of `filecmp.cmp()` and the default value!

Ciao,
	Marc 'BlackJack' Rintsch



From lobais at gmail.com  Mon Mar 26 11:53:04 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Mon, 26 Mar 2007 17:53:04 +0200
Subject: Kill thread or at least socket.getaddrinfo
Message-ID: <pan.2007.03.26.15.53.12@gmail.com>

Hi, I'm writing an application that connects to the internet.
Something like this:

for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
    af, socktype, proto, canonname, sa = res
    try:
        self.sock = socket.socket(af, socktype, proto)

Now if the user press the cancel button, I'd like the connection to 
imidiatly stop. I run
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
Dunno if they are both nessesary. I normaly use only the first, but it 
makes no difference to use both.

If python is at the actual connection in socket.socket( this work fine, 
but if python is at calling socket.getaddrinfo(, it doesn't stop.

I also can't kill the thread, as it is afaik not a possibility in python.
Is there any other way to do this?


From arkanes at gmail.com  Tue Mar  6 13:45:31 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 12:45:31 -0600
Subject: Project organization and import
In-Reply-To: <1173205801.346941.201060@8g2000cwh.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
	<1173199320.094675.58350@p10g2000cwp.googlegroups.com>
	<mailman.4722.1173200207.32031.python-list@python.org>
	<1173201871.742845.84040@t69g2000cwt.googlegroups.com>
	<mailman.4724.1173202470.32031.python-list@python.org>
	<1173205801.346941.201060@8g2000cwh.googlegroups.com>
Message-ID: <4866bea60703061045n1ff3ac12rb9f5ef3271ea1a59@mail.gmail.com>

On 6 Mar 2007 10:30:03 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 6, 9:34 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > It assumes that util.common is a module thats on the PYTHONPATH.
>
> Now we're getting somewhere. :)
>
> > The common way to ensure that this is the case is either to handle
> > util as a separate project, and install it into the system
> > site-packages just as you would any third party package,
>
> This breaks if you ever need to test more than one branch of the same
> code base. I use a release branch and a development branch. Only the
> release branch goes into site-packages, but obviously I do most of my
> work in the development branch.
>

Theres a number of solutions. They do involve manipulation of
PYTHONPATH or creation of infrastructure, though. I find that I
generally work "against" only one version of package at a time, so
it's not any trouble for me to create a local directory that has all
the version I'm working against. Testing infrastructure manipulates
PYTHONPATH to ensure it's testing the version its supposed to.

> > or to have it
> > (and all your other application packages and modules) off a single
> > root which is where your your application "base" scripts live.
>
> This has SERIOUS scaling problems.
>

If you have lots of modules used by lots of "things" it can be. Not
necessarily though, it depends on how you package and deploy them.
It's often the best solution to the above issue when it comes to
testing, though.

> > This, and other intra-package import issues are affected by the
> > relative/absolute import changes that were begun in Python 2.5, you
> > can read about them here:http://www.python.org/dev/peps/pep-0328/
>
> Awesome! Thanks. I'll take a look.
>
> > Note that using relative imports to import a package that "happens" to
> > be share a common higher level directory would be frowned upon.
>
> What if it shares a common higher level directory by design? :)
>

Then its a subpackage of a parent package. That's different than just
walking up to wherever your did your RCS checkout.

> Relative imports aren't ideal, but I think in some cases it's better
> than relying on PYTHONPATH which is global state (an environment
> variable no less).
>

Environment and manipulation of it is the job of the top level
script/application/whatever. Modules/packages/whatever should rely on
PYTHONPATH being sane.

> Martin
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From mail at microcorp.co.za  Tue Mar 27 02:47:26 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 27 Mar 2007 08:47:26 +0200
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
Message-ID: <009301c7703b$c8c0ac00$03000080@hendrik>

 "Diez B. Roggisch" <deets at nospam.web.de> wrote:


> Nick Craig-Wood wrote:
> 
> > Did anyone write a contextmanager implementing a timeout for
> > python2.5?
> > 
> > I'd love to be able to write something like
> > 
> >     with timeout(5.0) as exceeded:
> >         some_long_running_stuff()
> >     if exceeded:
> >         print "Oops - took too long!"
> > 
> > And have it work reliably and in a cross platform way!
> 
> Cross platform isn't the issue here - reliability though is. To put it
> simple: can't be done that way. You could of course add a timer to the
> python bytecode core, that would "jump back" to a stored savepoint or
> something like that.
> 
> But to make that work reliably, it has to be ensured that no sideeffects
> occur while being in some_long_running_stuff. which doesn't only extend to
> python itself, but also external modules and systems (file writing, network
> communications...). Which can't be done, unless you use a time-machine.
> Which I'd take as an personal insult, because in that rolled-back timeframe
> I will be possibly proposing to my future wife or something...
> 

how does the timed callback in the Tkinter stuff work - in my experience so 
far it seems that it does the timed callback quite reliably...

probably has to do with the fact that the mainloop runs as a stand alone 
process, and that you set the timer up when you do the "after" call.

so it probably means that to emulate that kind of thing you need a 
separate "thread" that is in a loop to monitor the timer's expiry, that 
somehow gains control from the "long running stuff" periodically...

so Diez is probably right that the way to go is to put the timer in the
python interpreter loop, as its the only thing around that you could 
more or less trust to run all the time.

But then it will not read as nice as Nick's wish, but more like this:

id = setup_callback(error_routine, timeout_in_milliseconds)
long_running_stuff_that_can_block_on_IO(foo, bar, baz)
cancel_callback(id)
print "Hooray it worked !! "
sys.exit()

def error_routine():
    print "toughies it took too long - your chocolate is toast"
    attempt_at_recovery_or_explanation(foo, bar, baz)

Much more ugly.
But would be useful to be able to do without messing with
threads and GUI and imports. 
Could be hard to implement as the interpreter would have 
to be assured of getting control back periodically, so a 
ticker interrupt routine is called for - begins to sound more 
like a kernel function to me.  
Isn't there something available that could be got at via ctypes?

- Hendrik






From bjourne at gmail.com  Thu Mar  1 06:15:21 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Thu, 1 Mar 2007 12:15:21 +0100
Subject: class declaration shortcut
In-Reply-To: <1172699617.628947.118110@m58g2000cwm.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<7o-dndyPgY_db3jYnZ2dnUVZ_t2tnZ2d@comcast.com>
	<1172699617.628947.118110@m58g2000cwm.googlegroups.com>
Message-ID: <740c3aec0703010315g49993d77y90e383ebcec408ab@mail.gmail.com>

On 28 Feb 2007 13:53:37 -0800, Luis M. Gonz?lez <luismgz at gmail.com> wrote:
> Hmmm... not really.
> The code above is supposed to be a shorter way of writing this:
>
> class Person:
>     def __init__(self, name, birthday, children):
>         self.name = name
>         self.birthday = birthday
>         self.children = children
>
> So the purpose of this question is finding a way to emulate this with
> a single line and minimal typing.

I believe this is what you are looking for:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/361668

    olle = attrdict(name = "Olle", birthday = date(2222, 12, 1), children = 329)
    print olle.name, olle.birthday, olle.children

It is not identical to the Ruby recipe, but is IMHO better. Being able
to instantiate objects on the fly, without having to explicitly
declare the class, is a big advantage.

-- 
mvh Bj?rn


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 08:31:25 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 13:31:25 +0100
Subject: Private data
In-Reply-To: <1174298781.038887.29330@b75g2000hsg.googlegroups.com>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<45fe5335$0$14570$426a74cc@news.free.fr>
	<1174298781.038887.29330@b75g2000hsg.googlegroups.com>
Message-ID: <45fe829c$0$16064$426a74cc@news.free.fr>

Dustan a ?crit :
> On Mar 19, 4:09 am, Bruno Desthuilliers <bruno.
> 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
>> Dustan a ?crit :
>>
>>> http://dustangroups.googlepages.com/privateattributesinpython
>>> This is something that I just threw together this morning, after a
>>> eureka moment. It's a way of creating private class attributes
(snip)
>>> 1. Has anyone else ever come up with something like this? I can't
>>> imagine I'm the only person who's ever thought of this.
>> With something like trying to forcefit access restriction in Python ?
>> Nope, you're not the first one here. I've not seen anyone using such a
>> thing in any of the projects I've worked on/with yet.
> 
> You ignored certain parts of my post, like "I'm not considering
> actually using this, but I do have a couple questions about it"; I
> assume that means you're not even going to begin to attempt to answer
> my queries. Likewise, you ignored a similar message on the page I
> linked to. I already knew about everything you told me.
> 
> With all this active ignoring, I get the feeling you're not even
> trying to respond to my questions. So why respond in the first place?
> Were you trying to be hostile?
 >
> Because I can't see any other intent
> for your post.

I didn't missed the "I'm not considering actually using this" part, but 
I missed the note on the page - and I apologize if you felt offended by 
my remarks, which were effectivly a bit on the reactive side. Still 
there was an implied question : *why* trying to implement access 
restriction in Python ?



From steven.potter at gmail.com  Mon Mar 12 20:34:11 2007
From: steven.potter at gmail.com (Steve  Potter)
Date: 12 Mar 2007 17:34:11 -0700
Subject: attaching Tkinter Listbox to python list object
Message-ID: <1173746051.180729.97350@h3g2000cwc.googlegroups.com>

I am trying to find some method of attaching a Listbox object to a
list object so as the contents of the list are changed the contents of
the Listbox will be updated to match.  I have found a few references
to something like this in this old post
http://groups.google.com/group/comp.lang.python/browse_thread/thread/3a6fe7534c812f55/43f201ab53cfdbf7
as well as here http://effbot.org/zone/wck-4.htm .

It just seems that there should be some way of achieving this.

The only this I can think of is create a subclass of list that deletes
and then refills the Listbox every time that the list changes, but
this seems very in efficient.


Any ideas?

Steve



From john.pye at gmail.com  Wed Mar 21 02:35:09 2007
From: john.pye at gmail.com (John Pye)
Date: 20 Mar 2007 23:35:09 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5376.1174457321.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
Message-ID: <1174458909.732321.101590@n59g2000hsh.googlegroups.com>

Gabriel, if you think you can make an example that works, that would
be great. I'm afraid I feel a bit out of my depth and don't have much
confidence in this idea.

JP



From mahs at telcopartners.com  Fri Mar 16 01:11:40 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Thu, 15 Mar 2007 23:11:40 -0600
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
Message-ID: <etdcet$nbd$1@sea.gmane.org>

n00m wrote:
> http://www.spoj.pl/problems/SUMFOUR/
> 
> 3
> 0 0 0 0
> 0 0 0 0
> -1 -1 1 1
> Answer for this input data is 33.
> 
> My solution for the problem is
> ======================================================================
> 
> import time
> t = time.clock()
> 
> q,w,e,r,sch,h = [],[],[],[],0,{}
> 
> f = open("D:/m4000.txt","rt")
> 
> n = int(f.readline())
> 
> for o in range(n):
>   row = map(long, f.readline().split())
>   q.append(row[0])
>   w.append(row[1])
>   e.append(row[2])
>   r.append(row[3])
> 
> f.close()
> 
> for x in q:
>   for y in w:
>     if h.has_key(x+y):
>       h[x+y] += 1
>     else:
>       h[x+y] = 1
> 
> for x in e:
>   for y in r:
>     sch += h.get(-(x+y),0)
> 
> q,w,e,r,h = None,None,None,None,None
> 
> print sch
> print time.clock() - t
> 
> ===============================================================
> 
> Alas it gets "time limit exceeded".
> On my home PC (1.6 GHz, 512 MB RAM) and for 4000 input rows it
> executes ~1.5 min.
> Any ideas to speed it up say 10 times? Or the problem only for C-like
> langs?
> 
Perhaps a bit faster using slicing to get the lists and avoiding dict.get:

def sumfour(src):
     l = map(int, src.split())
     dct={}
     s=0
     A, B, C, D = l[1::4], l[2::4], l[3::4], l[4::4]
     for a in A:
         for b in B:
             if a+b in dct:
                 dct[a+b] += 1
             else:
                 dct[a+b] = 1
     for c in C:
         for d in D:
             if -c-d in dct:
                 s+= dct[-c-d]
     return s


if __name__ == '__main__':
     import sys
     print sumfour(sys.stdin.read())


Michael



From kyosohma at gmail.com  Mon Mar 19 15:04:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 12:04:09 -0700
Subject: Choosing Python
In-Reply-To: <mailman.5292.1174330354.32031.python-list@python.org>
References: <mailman.5292.1174330354.32031.python-list@python.org>
Message-ID: <1174331049.460684.174950@l77g2000hsb.googlegroups.com>

On Mar 19, 1:52 pm, "Sells, Fred" <f... at adventistcare.org> wrote:
> glad to hear it.  Those of us who would like to introduce it in reluctant
> schools elsewhere could benefit from a post-semester evaluation, including
> student comments and some sample, running projects.
>
> -----Original Message-----
> From: python-list-bounces+frsells=adventistcare.... at python.org
>
> [mailto:python-list-bounces+frsells=adventistcare.... at python.org]On
> Behalf Of adawo... at sbcglobal.net
> Sent: Sunday, March 18, 2007 9:22 PM
> To: python-l... at python.org
> Subject: Choosing Python
>
> The choice is made.   The school where I teach has finally
> made its decision to teach Python first.    For several years,
> we have been teaching Java first, and before that, C++.
>
> I introduced Python in one of my courses and got a lot of
> flak from some of the other faculty.  I also introduced Ruby,
> and got even more flak.   In my course, the students loved
> Python for its simplicity, its power, and its flexibility.
>
> It is clear that Python is not the ultimate, one-size-fits-all
> language.  No language is.  However, for a beginner's
> language it is nearly ideal.   Further, it is a great language
> for a wide range of serious programming problems.
>
> For large-scale, safety-critical software, I still prefer Eiffel
> or Ada.   Java could vanish tomorrow and, with Python
> and Ruby available, no one would miss Java at all.  As for
> C++, for any serious software systems, it should always be
> the language of last resort.   C++, as an object-oriented
> assembler, is pretty much its own virus.
>
> Already, students are turning in really good projects in Python,
> and some in Ruby.   Not all the professors are on-board with
> this decision, but in time I think they will be.
>
> Richard Riehle
>
> --http://mail.python.org/mailman/listinfo/python-list

What would be really cool is to mix in the whole C/C++ extension
paradigm...or IPython/Jython in a second semester class. That way the
students could get into more real-world language mixes, which most
developers have to deal with. We run COBOL, Python, PHP, and some
truly awful VBA here. I wish I could have learned Python to being
with, but it would have needed to have been supplemented with some of
the other lower-level languages as well.

Mike



From esj at harvee.org  Fri Mar 23 18:34:31 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Fri, 23 Mar 2007 18:34:31 -0400
Subject: fine grain logging cotrol
In-Reply-To: <eu12qc$1n5$00$1@news.t-online.com>
References: <mailman.5451.1174567188.32031.python-list@python.org>	<etu19j$nqi$03$1@news.t-online.com>	<mailman.5464.1174579174.32031.python-list@python.org>	<etuvoj$pqs$03$1@news.t-online.com>	<etvvij$7h3$01$1@news.t-online.com>	<mailman.5519.1174663861.32031.python-list@python.org>
	<eu12qc$1n5$00$1@news.t-online.com>
Message-ID: <eu1kls$og8$1@sea.gmane.org>

Peter Otten wrote:
> Eric S. Johansson wrote:
> 
> Here is yet another revision of my example then:

it's making more and more sense although I don't quite follow 'property' 
quite yet.  But I see that get_logger is invoked prior to the 
__logger.info call.

I was looking at how to implement one of my other requirements 
(conditional based on a predicate) and I see that I could use a filter. 
    I've experimented a little but come up empty.  This is what I changed:

class filter_test (logging.Filter):
     test_names = { "Felis.alpha" : True,
                    "Catus.alpha" : False,
                    }

     def ___init__ (self, name):
         """simple filter test """
         self.name = name

     def filter(self, record):
         """test and forget """
         return test_names.has_key(self.name) and test_names[self.name]

class LoggedType(type):
     def __new__(mcl, name, bases, classdict):
         def get_logger(self):
             tag = "%s.%s" % (name,sys._getframe(1).f_code.co_name)
             lgr = logging.getLogger(tag)
             lgr.addFilter(filter_test)
             return lgr

         classdict["_%s__logger" % name] = property(get_logger)
         return type.__new__(mcl, name, bases, classdict)

It's probably real obvious but I keep getting a:

   File "C:\Python24\lib\logging\__init__.py", line 539, in filter
     if not f.filter(record):
TypeError: unbound method filter() must be called with filter_test 
instance as first argument (got LogRecord instance instead)


I'm puzzled that I thought I was adding the filter object at the right 
point in time with addFilter.  I wouldn't be surprised if I was totally 
off base but I'd be interested in figuring out how I went off the rails 
so I can fill in the knowledge.

---eric





From steven.bethard at gmail.com  Fri Mar 16 13:15:39 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Fri, 16 Mar 2007 11:15:39 -0600
Subject: getopt or optparse options/arguments wrapping?
In-Reply-To: <1174048469.334735.185750@l77g2000hsb.googlegroups.com>
References: <1174048469.334735.185750@l77g2000hsb.googlegroups.com>
Message-ID: <_9OdneVkFJIhTWfYnZ2dnUVZ_vWtnZ2d@comcast.com>

Rocky Zhou wrote:
> I wonder is there any way to make the wrapper program can wrap options
> && arguments for the  the  subprocess/command the wrapper will
> execute? by getopt or optparse module?
[snip]
> I need this because I now have finished a fs_backup script written in
> python, it will execute tar && find to complete full and
> differentiating/incremental backup for the file system level files,
> and their restoring. This script will do different things by the
> command line arguments, and execute find/tar in different ways, but
> for being more flexible, I want some options of tar/find can also been
> specified from the command line directly, and the script just transmit
> those to tar/find simply.

I'm not clear on exactly what it is you want.  Are you trying to do
something like::

    fs_backup --foo --bar x y z --tar-foo --tar-bar tx ty tz

where ``--foo --bar x y z`` gets handled by your command and ``--tar-foo
--tar-bar tx ty tz`` gets passed on through to the tar command?

STeVe


From Eugene.Antimirov at portaone.com  Mon Mar 19 13:33:03 2007
From: Eugene.Antimirov at portaone.com (Eugene Antimirov)
Date: Mon, 19 Mar 2007 19:33:03 +0200
Subject: pyosd question
Message-ID: <45FEC94F.80608@portaone.com>

Small script used to work, by last week I noticed that it simply hangs 
up. Can someone run this code on his own python and tell me about 
results? Help me please.

import time
import pyosd
import re

default_font="-adobe-helvetica-medium-r-*-*-24-*"

interval = 2
temp_led_number = pyosd.osd(default_font, colour='#038b06',
      
timeout=1,pos=pyosd.POS_BOT,offset=40,shadow=1,align=pyosd.ALIGN_CENTER)
   
def display():
    # Here it will stay forever
    temp_led_number.display('123', pyosd.TYPE_STRING)
    # Never reach this line :(
    print "Yeah!"
   
while 1:
    display()
    time.sleep(interval)


-- 
Sincerely,
Eugene Antimirov
PortaOne, Inc., SIP Engineer
support at portaone.com



From matthew.garman at gmail.com  Mon Mar 26 11:10:03 2007
From: matthew.garman at gmail.com (Matt Garman)
Date: Mon, 26 Mar 2007 09:10:03 -0600
Subject: Python object overhead?
In-Reply-To: <56ja46F28lpp9U1@mid.individual.net>
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
Message-ID: <bdd6985b0703260810h78d25589r60da9bba2fad1d6e@mail.gmail.com>

On 3/23/07, Bjoern Schliessmann
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
> "one blank line" == "EOF"? That's strange. Intended?

In my case, I know my input data doesn't have any blank lines.
However, I'm glad you (and others) clarified the issue, because I
wasn't aware of the better methods for checking for EOF.

> > Example 2: read lines into objects:
> > # begin readobjects.py
> > import sys, time
> > class FileRecord:
> >     def __init__(self, line):
> >         self.line = line
>
> What's this class intended to do?

Store a line :)  I just wanted to post two runnable examples.  So the
above class's real intention is just to be a (contrived) example.

In the program I actually wrote, my class structure was a bit more
interesting.  After storing the input line, I'd then call split("|")
(to tokenize the line).  Each token would then be assigned to an
member variable.  Some of the member variables turned into ints or
floats as well.

My input data had three record types; all had a few common attributes.
 So I created a parent class and three child classes.

Also, many folks have suggested operating on only one line at a time
(i.e. not storing the whole data set).  Unfortunately, I'm constantly
"looking" forward and backward in the record set while I process the
data (i.e., to process any particular record, I sometimes need to know
the whole contents of the file).  (This is purchased proprietary
vendor data that needs to be converted into our own internal format.)

Finally, for what it's worth: the total run time memory requirements
of my program is roughly 20x the datafile size.  A 200MB file
literally requires 4GB of RAM to effectively process.  Note that, in
addition to the class structure I defined above, I also create two
caches of all the data (two dicts with different keys from the
collection of objects).  This is necessary to ensure the program runs
in a semi-reasonable amount of time.

Thanks to all for your input and suggestions.  I received many more
responses than I expected!

Matt


From kf9150 at gmail.com  Fri Mar 30 12:21:08 2007
From: kf9150 at gmail.com (kf9150 at gmail.com)
Date: 30 Mar 2007 09:21:08 -0700
Subject: Library for windows ini-files ?
In-Reply-To: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
References: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
Message-ID: <1175271668.888450.124160@e65g2000hsc.googlegroups.com>

On Mar 30, 1:26 am, stef <s.mien... at id.umcn.nl> wrote:
> hello,
>
> is there a Python library for easy reading and writing windows ini-files ?
>
> thanks,
> Stef Mientki

Maybe check this out?
http://www.voidspace.org.uk/python/configobj.html



From Graham.Dumpleton at gmail.com  Wed Mar 14 17:31:04 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: 14 Mar 2007 14:31:04 -0700
Subject: merits of Lisp vs Python
In-Reply-To: <87odmvinhf.fsf@pobox.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
	<1173581125.663707.5810@s48g2000cws.googlegroups.com>
	<87odmvinhf.fsf@pobox.com>
Message-ID: <1173907864.802954.66820@n59g2000hsh.googlegroups.com>

On Mar 15, 7:22 am, j... at pobox.com (John J. Lee) wrote:
> "Graham Dumpleton" <Graham.Dumple... at gmail.com> writes:
> > On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
> [...]
> > >mod_pythonrelies on an unsupported feature of Python, namely
> > > multiple interpreters --> risk of more pain with C extensions.
>
> > As usual, those bashing up onmod_pythontend not to really know what
> > they are talking about. :-(
>
> > Although multiple Python interpreters cannot be manipulated directly
> > from within a Python script, they can from the Python C API and it is
> > very much a feature of Python and has been for a long time.
>
> I didn't dispute that multiple interpreters are a feature of Python.
> I said that they are an unsupported feature -- at least, Martin
> v. Loewis says they're "just broken", which is close enough for me:
>
> http://groups.google.co.uk/group/comp.lang.python/browse_thread/threa...
>
> """
> In any case, it looks like that the "multiple interpreters" feature of
> Python is just broken.
> """

For mod_python at least, the issues described there do not present as
a problem because in mod_python sub interpreters are never destroyed
while the process is running. Thus as far as the implementation of
mod_python goes it is fine to key off the pointer to the interpreter
as one knows interpreters will never go away.

In the more general case I can see that it may be an issue for some
small percentage of C extension modules which may want to cache
information per interpreter. This though would only be the case if
they wanted to exclusively hold everything directly within the C code
space. Although it would perceivably slow access down, there is
nothing to stop such a module instantiating its own pseudo module
within the context of a sub interpreter using PyImport_AddModule().
This Python module could then be used to hold objects created by
PyCObject_FromVoidPtr() with access later being had by using
PyCObject_AsVoidPtr() after having looked up the object in the module.
As necessary, when creating these objects, the C extension module can
associate a cleanup function to be called when the object is destroyed
by virtue of the sub interpreter being destroyed. Thus the C extension
module would be able to cope with sub interpreters coming an going.

So, more work is required and some may be concerned about efficiency
and that a user may screw with the cached data from Python code, but
it is possible to have per interpreter information with a C extension
module.

> [...]> Even so, to get such a C extension module working in the context of
> >mod_pythonsimply means tellingmod_pythonto run that particular
> > application in the first interpreter instance by specifying the
> >mod_pythondirective:
>
> >   PythonInterpreter main_interpreter
>
> [...]
>
> Is it possible to askmod_pythonto start separate processes to serve
> requests, rather than "separate" interpreters?  We couldn't see a way.

Within the context of Apache it is possible to write modules which
could spawn off a separate daemon process to which requests could
later be passed for processing. An example of this included with
Apache is something like mod_cgid. Other examples of modules which
allow requests to be farmed off to separate processes, although they
work a bit differently, are mod_fastcgi, mod_scgi and mod_proxy_ajp.

To do something similar with mod_python isn't really practical because
of the way it hooks into more than just the response handling phase of
Apache. This concept though is being investigated for some version of
mod_wsgi after the initial version has been released. When
implemented, it would allow mod_wsgi to either handle WSGI
applications in the same style as mod_python within the Apache child
processes, or optionally farm the request off to a separate process
running either as the same user as Apache or a different user, in the
same style as mod_fastcgi and mod_scgi. The difference with mod_wsgi
would be that it would be one self contained module all managed from
Apache and would not require a separate executable or daemon process
to Apache to be run to which it would communicate with as the separate
daemon processes would ultimately just be a fork of the Apache parent
process and be running code from the Apache module itself. Also the
application scripts would be exactly the same no matter which mode it
was running in so no need to modify them in any special way to run
under the separate process.

Graham



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  2 15:22:45 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 02 Mar 2007 21:22:45 +0100
Subject: Sorting strings containing special characters (german 'Umlaute')
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>	<hbf.20070302v8dv@bombur.uio.no>
	<54r2c4F21fssbU1@mid.individual.net>
	<mailman.4610.1172858099.32031.python-list@python.org>
Message-ID: <54rfclF22ck5iU2@mid.individual.net>

Robin Becker wrote:

> Bj?rn, in one of our projects we are sorting in javascript in
> several languages English, German, Scandinavian languages,
> Japanese; from somewhere (I cannot actually remember) we got this
> sort spelling function for scandic languages
> 
> a
> .replace(/\u00C4/g,'A~') //A umlaut
> .replace(/\u00e4/g,'a~') //a umlaut
> .replace(/\u00D6/g,'O~') //O umlaut
> .replace(/\u00f6/g,'o~') //o umlaut
> .replace(/\u00DC/g,'U~') //U umlaut
> .replace(/\u00fc/g,'u~') //u umlaut
> .replace(/\u00C5/g,'A~~') //A ring
> .replace(/\u00e5/g,'a~~'); //a ring
> 
> does this actually make sense?

If I'm not mistaken, this would sort all umlauts after the "pure"
vowels. This is, according to <http://de.wikipedia.org/wiki/
Alphabetische_Sortierung>, used in Austria. 

If you can't understand german, the rules given there in
section "Einsortierungsregeln" (roughly: ordering rules) translate
as follows:

"X und Y sind gleich": "X equals Y"
"X kommt nach Y": "X comes after Y"

Regards&HTH,


Bj?rn

-- 
BOFH excuse #146:

Communications satellite used by the military for star wars.



From gagsl-py2 at yahoo.com.ar  Mon Mar 19 01:07:02 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 02:07:02 -0300
Subject: class objects, method objects, function objects
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
Message-ID: <op.tpe650abx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Mon, 19 Mar 2007 01:38:37 -0300, 7stud <bbxx789_05ss at yahoo.com>  
escribi?:

> But the last part of the passage makes no sense to me:
> ------
> When the method object is called with an argument list, it is unpacked
> again, a new argument list is constructed from the instance object and
> the original argument list, and the function object is called with
> this new argument list.
> ------
> Can anyone interpret that for me?

Calling a.foo(x,y) means that, after fetching foo from a, a new argument  
list must be constructed containing 3 items: the instance a (self), x and  
y.

-- 
Gabriel Genellina



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 18:46:13 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 10:46:13 +1100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
	<CqnGh.6368$re4.4381@newssvr12.news.prodigy.net>
Message-ID: <pan.2007.03.03.23.46.12.431525@REMOVE.THIS.cybersource.com.au>

On Sat, 03 Mar 2007 23:22:10 +0000, James Stroud wrote:

>> To my mind, having to supply a key to dict.pop makes it rather pointless.
>> 
>> 
> 
> 
> I've used it in something like this and found it worthwhile:
> 
> for akey in dict1:
>    if some_condition(akey):
>      dict2[akey] = dict2.pop(akey)

Surely that's a no-op? You pop the value, than add it back again.

Or do you mean dict2[akey] = dict1.pop(akey)?

If so, are you sure that works? When I try it, I get "RuntimeError:
dictionary changed size during iteration". You would need to take a copy
of the keys and iterate over that.

for key in dict1.keys():
    if some_condition(key):
        dict2[key] = dict1.pop(key)



-- 
Steven.



From harry.g.george at boeing.com  Tue Mar 27 06:20:23 2007
From: harry.g.george at boeing.com (Harry George)
Date: Tue, 27 Mar 2007 10:20:23 GMT
Subject: Help in Placing Object in Memory
References: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
Message-ID: <xqxmz1z0yzc.fsf@cola3.ca.boeing.com>

"Clement" <jeba.ride at gmail.com> writes:

> I am newbie to Python...... i want to know something..........
> 
> can i place an object in disk instead of placing in Main Memory...?
> 
> If possible, can you please explain with some scripts...?
> 
> can two python script share a common object....?
> 

For the CPU to use the object, it needs to be in RAM.  But it is
possible to save the RAM image onto disk, and then bring it back
later.  The common approach is called "pickling", though there are
several variants on this:

 http://docs.python.org/lib/persistence.html


-- 
Harry George
PLM Engineering Architecture


From knipknap at gmail.com  Sat Mar 10 13:52:45 2007
From: knipknap at gmail.com (Samuel)
Date: 10 Mar 2007 10:52:45 -0800
Subject: CGI handler: Retrieving POST and GET at the same time
Message-ID: <1173552765.277146.273730@t69g2000cwt.googlegroups.com>

Hi,

I have the following form:

<form action="?one=1" method="post">
<input  type="hidden" name="two" value="2" />
</form>

and would like to retrieve both fields, "one" and "two". However, the
following does not work:

form_data = cgi.FieldStorage()
for key in form_data:
    print key + ":", form_data[key].value

It prints out:
two: 2

How can I retrieve the GET variables in that context?

-Samuel



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  1 15:45:55 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 01 Mar 2007 21:45:55 +0100
Subject: Questions about app design - OOP with python classes
In-Reply-To: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
Message-ID: <45e733aa$0$25247$426a74cc@news.free.fr>

adriancico at gmail.com a ?crit :
> Hi
> 
>     I am working on a python app, an outliner(a window with a TreeCtrl
> on the
> left to select a document, and a RichTextBox at the right to edit the
> current
> doc).
> 
>     I am familiarized with OOP concepts and terms but I lack practical
> experience
> , so any comment/tip/pointer to docs will be welcome.
> 
>     So far, I have created a separated class for each important
> element of my app
>         - the main Frame (cFrmMain)
>         - the TreeCtrl
>         - the TextCtrl at the right
>         - a cDocument class that contains the entire file with all
> docs
>           and manages creation/deletion/saving to disk, etc
>         - classes for the toolbar, the menubar, etc

As a side note : hungarian notation is usually considered bad form here. 
Look here for usual naming conventions:
http://www.python.org/dev/peps/pep-0008/

>     With this design, pretty much everything is encapsulated in it
> respective
> class. However, that means that the main program logic is in the Frame
> class.

What do you call "main program logic" exactly ?

>>From there, it instantiates the other classes and is responsable of
> the
> communication between them.
 >
>     For example, the user deletes a node on the Tree, this raises an
> event
> on cFrmMain (the main Frame class). In the event handler, cFrmMain
> notifies
> cDocument that a node (and the associated text) has been deleted so
> the master
> file is modified accordingly.

Ok.

>     The problem is, I have been implementing some funcionalities to
> test this
> design, I have less than a dozen operations implemented and cFrmMain
> has grown
> more than acceptable, starting to get confusing.

Ok.

>     This design feels "not quite right" to me,

Looks "almost right" to me !-)

Using the main frame as a mediator between the different widgets is a 
well-known design pattern, named - suprisingly - mediator. The 
motivation is that it avoid each and every widget to know about the 
existence of every other widget. You may want to read about this pattern 
- but note that most litterature about design patterns is expressed in 
terms of statically typed languages (Java, C++ etc), and that dynamic 
languages like Python usually don't need that much boilerplate and 
complication (IOW : try to understand the pattern itself, not to blindly 
apply it).

What's your looking for IMHO is the "controller" part - the one that 
glue together the "view" (main frame and all it's widgets) and the 
"model" (mostly, your document). Here again, googling for 
"model/view/controller" (MVC) may be a good idea.

> I've been considering
> allowing
> the different classes to know of the existence of each other and pass
> messages
> between them. I would lose encapsulation (I think),

At least this would introduce too much coupling between these classes.

Note that there's nothing Python-specific in your question. But since 
comp.object is one of the worst places on earth to ask questions about OO...


From nick at craig-wood.com  Tue Mar 27 01:34:45 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 27 Mar 2007 00:34:45 -0500
Subject: Sending ECHO_REQUEST (pinging) with python
References: <pan.2007.03.26.14.50.50@gmail.com>
	<mailman.5632.1174921595.32031.python-list@python.org>
Message-ID: <slrnf0gb3u.i3r.nick@irishsea.home.craig-wood.com>

Jean-Paul Calderone <exarkun at divmod.com> wrote:
>  On Mon, 26 Mar 2007 16:50:33 +0200, Thomas Dybdahl Ahle <lobais at gmail.com> wrote:
> >Den Mon, 26 Mar 2007 06:30:04 -0500 skrev Nick Craig-Wood:
> >> Under linux the only priviledge you need is CAP_NET_RAW.  It is possible
> >> to give this to a process - a bit of searching with google will show you
> >> how!
> >
> >How, I did google, but I wasn't able to find any way to do this in
> >python..
> 
>  You need a sendmsg wrapper (there are several, none in the stdlib), then
>  you need a privileged process which is willing to give you the privilege.
> 
>  It's pretty inconvenient.

You start a user process with an extra capability using want using
libcap and the execcap and sucap tools.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From deets at nospam.web.de  Tue Mar 13 19:08:10 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 Mar 2007 00:08:10 +0100
Subject: help!! *extra* tricky web page to extract data from...
In-Reply-To: <7x1wjskbs7.fsf@ruckus.brouhaha.com>
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
	<55oli1F25u2dmU1@mid.uni-berlin.de>
	<7xmz2gbx6r.fsf@ruckus.brouhaha.com>
	<55omooF25ll0vU1@mid.uni-berlin.de>
	<7x1wjskbs7.fsf@ruckus.brouhaha.com>
Message-ID: <55op6uF24n2biU1@mid.uni-berlin.de>

Paul Rubin schrieb:
> "Diez B. Roggisch" <deets at nospam.web.de> writes:
>> Nice idea, but not really helpful in the end. Besides the rather nasty
>> parts of the DOMs that make JS programming the PITA it is, I think the
>> whole event-based stuff makes this basically impossible.
> 
> Obviously the Python interface would need ways to send events into the
> DOM, simulating timer ticks, mouse clicks, and so forth, just like
> urllib in a sense simulates a user navigating a browser.

Obviously this wouldn't really help, as you can't predict what a website 
actually wants which events, in possibly which order. Especially if the 
site does not _want_ to be scrapable- think of a simple "click on the 
images in the order of the numbers shown on them" captcha.

Most time it's easier to sniff the http stream & grab the data directly.

Diez


From inq1ltd at verizon.net  Sat Mar 17 15:43:14 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sat, 17 Mar 2007 15:43:14 -0400
Subject: SQLite3, data not found
In-Reply-To: <cUVKh.8139$yW.7117@newssvr11.news.prodigy.net>
References: <200703161755.58549.inq1ltd@verizon.net>
	<mailman.5226.1174143760.32031.python-list@python.org>
	<cUVKh.8139$yW.7117@newssvr11.news.prodigy.net>
Message-ID: <200703171543.14452.inq1ltd@verizon.net>

On Saturday 17 March 2007 13:51, John Nagle wrote:
> jim-on-linux wrote:
> > On Friday 16 March 2007 18:23, Jerry Hill 
wrote:
> >>On 3/16/07, jim-on-linux
> >> <inq1ltd at verizon.net>
> >
> > wrote:
> >>>Below, the first select produces results
> >>> but, after closing then re-opening the
> >>> database the select produces an empty list.
> >>>  Anyone know the reason ??
> >>
> >>When you first open a connection, you
> >>implicitly begin a transaction. You need to
> >>call con.commit() before you close the
> >>connection, or your transaction will be
> >> rolled back when you close() it.  If don't
> >> want to bother with transaction handling,
> >> you can turn it off when you open the
> >> connection, like this: con =
> >> sqlite3.connect('myData',
> >>isolation_level=None)
> >>
> >>See the Python Database API 2.0 PEP for more
> >>details about the behavior required of DB-API
> >>2.0 compliant interfaces:
> >>http://www.python.org/dev/peps/pep-0249/
> >>
> >>--
> >>Jerry
> >
> > Thanks, this saves a lot of con.commit
> > action. And the website is valuable.
> >
> > jim-on-linux
>
>     Don't turn off atomic transactions, use
> them. Otherwise, two copies of your program
> running at the same time will probably not do
> what you want. Just call "commit" at the end of
> each transaction.
>
> 			John Nagle

Thanks 
I appreciate the help.

jim-on-linux








From bbxx789_05ss at yahoo.com  Sun Mar 18 13:15:42 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 18 Mar 2007 10:15:42 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <7xbqir9d05.fsf@ruckus.brouhaha.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
	<7xfy845q24.fsf@ruckus.brouhaha.com>
	<mailman.5220.1174128479.32031.python-list@python.org>
	<7xbqir9d05.fsf@ruckus.brouhaha.com>
Message-ID: <1174238142.658049.13380@e65g2000hsc.googlegroups.com>

On Mar 18, 2:23 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Steve Holden <s... at holdenweb.com> writes:
> > >    max(i for i,t in enumerate(x) if t <= y)
> > > Those are actually pretty direct.
>
> > How about a solution (like the bisect one suggested almost as soon as
> > this thread started) that doesn't iterate over the whole list.
>
> Here's a Haskell-inspired one:
>
>     len(list(itertools.takewhile(lambda t: y > t, x)))
>

Can you explain how list() works in that statement.  I looked up
takewhile() and it returns an iterator that will automatically stop at
the insertion point?  So does list() do an internal comprehension with
the iterator?



From millerdev at gmail.com  Fri Mar  9 17:57:58 2007
From: millerdev at gmail.com (Daniel Miller)
Date: Fri, 09 Mar 2007 17:57:58 -0500
Subject: Hamburg Pythoneers Monthly Meeting: Wed, Apr 11
In-Reply-To: <D6C3721D-F162-42FD-8CC7-2B6FC6DFBBD4@devmates.com>
References: <D6C3721D-F162-42FD-8CC7-2B6FC6DFBBD4@devmates.com>
Message-ID: <45F1E676.1090502@gmail.com>

Hello Helge,

Which "AOPython" module will be covered during the meeting? Is it this one:

http://www.openpolitics.com/pieces/archives/001710.html

If that's not the one then you can stop reading now :)...

But if that's the one you'll be highlighting then I'd be interested to hear what people think of it. I wrote that module, but I wasn't aware that anyone was using it. I wrote it as an exercise to learn about Python callables (functions, methods, etc.). I believe I did use it in a real project once to apply declarative exception handling and logging. I would love to know what others are using it for.

Thanks,
Daniel Miller


Helge Stahlmann wrote:
> +++++ Hamburg Python User Group April Meeting +++++
> 
> I am pleased to announce our next user group meeting:
> 
>         Wednesday, April 11, 2007 at 7:00pm
> 
> Location: DDD Design GmbH, Jarrestrasse 46, 22303 Hamburg.
> 
> Session highlight: Aspect-oriented programming with AOPython
> 
> RSVP now at http://python.meetup.com/179/calendar/5549826/
> 
> If you're interested in learning more, please visit our website at
> meetup.com: http://python.meetup.com/179/
> 
> 
> Additional links:
> 
> RSS Newsfeed:
> feed://www.meetup.com/rss/g/python/179/new/
> 
> Group Calendar RSS:
> feed://python.meetup.com/179/calendar/rss/The+Hamburg+Python+User+Group/
> 
> iCal:
> webcal://python.meetup.com/179/calendar/ical/The+Hamburg+Python+User 
> +Group/
> 
> 
> +++++ Hamburg Python User Group - Treffen im April +++++
> 
> Ich freue mich, an dieser Stelle unser n?chstes Meeting ank?ndigen zu  
> d?rfen:
> 
>         Mittwoch, 11. April 2007 um 19 Uhr
> 
> Veranstaltungsort: DDD Design GmbH, Jarrestrasse 46, 22303 Hamburg.
> 
> Highlight: Aspektorientierte Programmierung mit AOPython
> 
> Anmeldungen werden unter
> http://python.meetup.com/179/calendar/5549826/ entgegengenommen.
> 
> Weitere Informationen finden sich auf unserer Webseite bei meetup.com:
> http://python.meetup.com/179/
> 
> 
> Weitere Links:
> 
> RSS Newsfeed:
> feed://www.meetup.com/rss/g/python/179/new/
> 
> Gruppen Kalender RSS:
> feed://python.meetup.com/179/calendar/rss/The+Hamburg+Python+User+Group/
> 
> iCal:
> webcal://python.meetup.com/179/calendar/ical/The+Hamburg+Python+User 
> +Group/


From Joshua.R.English at gmail.com  Mon Mar  5 12:55:09 2007
From: Joshua.R.English at gmail.com (Joshua.R.English at gmail.com)
Date: 5 Mar 2007 09:55:09 -0800
Subject: Newbie question
In-Reply-To: <eshihi$1vq7$1@ulysses.news.tiscali.de>
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<eshihi$1vq7$1@ulysses.news.tiscali.de>
Message-ID: <1173117307.283564.22270@30g2000cwc.googlegroups.com>

On Mar 5, 9:03 am, Stargaming <stargam... at gmail.com> wrote:
> Tommy Grav schrieb:

>
> For this case, there are list comprehensions (or map, but you shouldn't
> use it any longer):


I didn't see anything in the docs about this.  Is map going away or is
it considered un-Pythonic now?

Josh



From __peter__ at web.de  Sun Mar 18 09:35:35 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 Mar 2007 14:35:35 +0100
Subject: [Help]UnicodeDecodeError
References: <1174224026.501145.19360@y66g2000hsf.googlegroups.com>
Message-ID: <etjf39$qp6$00$1@news.t-online.com>

Karl wrote:

> error msg:
> Mod_python error: "PythonHandler mod_python.publisher"
> 
> Traceback (most recent call last):
> 
>   File "/usr/lib/python2.3/site-packages/mod_python/apache.py", line
> 299, in HandlerDispatch
>     result = object(req)
> 
>   File "/usr/lib/python2.3/site-packages/mod_python/publisher.py",
> line 136, in handler
>     result = util.apply_fs_data(object, req.form, req=req)
> 
>   File "/usr/lib/python2.3/site-packages/mod_python/util.py", line
> 361, in apply_fs_data
>     return object(**args)
> 
>   File "/var/www/html/sky.py", line 38, in main
>     sresult = sresult.decode('zh-hk').encode('utf_8')
> 
> UnicodeDecodeError: 'big5hkscs' codec can't decode bytes in position
> 958-959: illegal multibyte sequence
> 
> 
> Wt can I do, since there is some characters, is there any solutions to
> solve it???

Other than requiring valid input? 
You can choose a more lenient decoding strategy, e. g.:

sresult = sresult.decode('zh-hk', "replace")

>>> help(s.decode)
Help on built-in function decode:

decode(...)
    S.decode([encoding[,errors]]) -> object

    Decodes S using the codec registered for encoding. encoding defaults
    to the default encoding. errors may be given to set a different error
    handling scheme. Default is 'strict' meaning that encoding errors raise
    a UnicodeDecodeError. Other possible values are 'ignore' and 'replace'
    as well as any other name registerd with codecs.register_error that is
    able to handle UnicodeDecodeErrors.

Peter



From duncan.booth at invalid.invalid  Mon Mar 19 16:23:05 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 19 Mar 2007 20:23:05 GMT
Subject: class objects, method objects, function objects
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
	<mailman.5281.1174315662.32031.python-list@python.org>
	<1174324902.778062.104610@b75g2000hsg.googlegroups.com>
Message-ID: <Xns98F8CF5C0A529duncanbooth@127.0.0.1>

"7stud" <bbxx789_05ss at yahoo.com> wrote:

> When the method object is called with an
> argument list,
> 
> x.g("GvR") ==> I think I'm both "referencing an instance attribute"
> and calling the method object with an argument list
> 
> it(the method object) is unpacked again, a new argument list is
> constructed from the instance object and the original argument list,
> and the function object is called with this new argument list.

It may help you to understand if you consider the two parts separately. 
There is no linkage between 'referencing an instance attribute' and 
'calling the method object'. You can rewrite the code as:

    method = x.g
    method("GvR")

and it works in exactly the same way. First you reference the attribute 
'x.g', which looks up MyClass.g (an unbound method) and calls 
MyClass.g.__get__(x, MyClass) which creates a new bound method. Then you 
call the bound method passing "GvR" as the first positional argument: so a 
single element tuple is created for the argument list.

The bound method object unpacks and repacks the tuple to give the two-tuple 
(self, "GvR") which it then passes to the original function.


From paul.rudin at ntlworld.com  Mon Mar 19 14:05:23 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Mon, 19 Mar 2007 18:05:23 +0000
Subject: PythonCard or Dabo?
References: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
Message-ID: <87lkht3y8s.fsf@rudin.co.uk>

Kevin Walzer <kw at codebykevin.com> writes:

> I'm curious to know what others think of these two frameworks for
> building wxPython apps.
>
> PythonCard has been around longer, but its development seems to have
> slowed. The last release, 0.8.2, has been out for quite awhile now.
>
> Dabo is newer and seems to have gathered a lot of buzz.
>
> Anyone try both? What's your preference and why? Is one more robust
> than the other?
>

Incidentally, there's also boa constructor, which at least has the
best name of the three :)



From jgodoy at gmail.com  Sun Mar 11 22:47:45 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 11 Mar 2007 23:47:45 -0300
Subject: setuptools and code.google.com (was Re: Signed zeros: is this a bug?)
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<7xps7f5ptp.fsf@ruckus.brouhaha.com>
	<1hutrb3.e1sbu5kvxk8nN%aleax@mac.com>
	<87odmznrbf.fsf@gmail.com> <1hutsxr.3pcc7j1w12q1oN%aleax@mac.com>
Message-ID: <87fy8bnpny.fsf_-_@gmail.com>

aleax at mac.com (Alex Martelli) writes:

> I'm not familiar with setuptools, what exactly is it looking for?
>
> If it's looking for stuff to download it should start at
>
> http://code.google.com/p/gmpy/downloads/list
>
> (but what does it want -- the sources' zipfile, or some binary, and in
> what format and with what naming convention?) -- I'll be glad to edit
> the URL for gmpy at cheeseshop if some setuptools expert can explain
> these subtleties... thanks for pointing out that there's a problem
> btw!-)

Thanks for caring ;-)


It looks for several things: eggs (for the Python version it is being used),
zipfiles and tarballs (I dunno if it looks for more things). 

If it finds, for example, gmpy-1.0.2-py2.4.egg it won't install here 'cause I
use Python 2.5 and then it will continue searching for gmpy-1.0.2-py2.5.egg or
an alternative format that can be used.  The last resort is the tarball / zip
with the sources so that the package can be rebuilt. 

Probably other people that are more experienced with it can help more.  I'm
more an end user of it and I know the essential for my needs. 

I just pointed out because setuptools helps a lot on obtaining a package and
installing it (even if there's some building needed before installing). 


Sorry for not being able to help more.


With regards to the hyperlink, I believe that if the link on Pypi was to the
URL above it would be easier.  Another alternative is a link at the first
page.  And, of course, the last alternative is teaching setuptools how to work
with code.google.com -- if it doesn't already know -- as it learnt how to work
with SourceForge and its "random" mirrors.  I don't know how to write that
code, though.


Be seeing you,
-- 
Jorge Godoy      <jgodoy at gmail.com>


From inq1ltd at verizon.net  Wed Mar 21 21:39:42 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Wed, 21 Mar 2007 21:39:42 -0400
Subject: the second of nested buttons using textvariable remains void!
In-Reply-To: <1174522287.135371.26220@o5g2000hsb.googlegroups.com>
References: <1174522287.135371.26220@o5g2000hsb.googlegroups.com>
Message-ID: <200703212139.42807.inq1ltd@verizon.net>

On Wednesday 21 March 2007 20:11, Samkos wrote:
> Hi there,
>
> I am fighting with a problem I intended to 
> believe trivial that I could not solve yet!
>
> I am trying to have a button with a variable
> text, that pops up another button with a
> variable text when pressed.
>
> I did that with the following program  in
> Python, but the second button remains always
> void!!! is it related to the textvariable
> parameters?
>
> If any of you had a clue, please  don't
> hesitate!
>
> in advance, many thanks
>
> Samuel
>
> #----------------------- program 2 buttons.py
> --------------------------
>
> from Tkinter import *
>
>
> def go(event):
>     root = Tk()
>
>     s1=StringVar()
>     s1.set("s1")
>     label1 = Label(root, textvariable=s1)
>     label1.pack(side=LEFT)
>
>     root.mainloop()
>
>
>
> root = Tk()
>
> s0=StringVar()
> s0.set("s0")
> label0 = Label(root, textvariable=s0)
> label0.pack(side=LEFT)
>
>
> root.bind("<Return>",go)
>
> root.mainloop()

try this;

def go():
    root = Tk()
    root.config(bg= 'yellow')
    s1=StringVar()
    blabel1 = Button(root, textvariable=s1,
                     width = 10, height = 2,
                     command = next)
    blabel1.pack()
    root.bind("<Return>", vbind)
    s1.set('click_s1')

def vbind(event):
    next()

def next():
    second = Toplevel()
    s0=StringVar()
    s0.set("click_s0")
    blabel0 = Button(second, textvariable=s0,
                  command = second.destroy,
                  width = 10, height = 2)
    blabel0.pack()

if __name__ == '__main__' :
     go()
     mainloop()


jim-on-linux
http://inqvista.com


















From lew at nospam.lewscanon.com  Thu Mar 22 08:45:50 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Thu, 22 Mar 2007 08:45:50 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <1174557840.338374.25990@d57g2000hsg.googlegroups.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
Message-ID: <57idnf5DTKfj55_bnZ2dnUVZ_uzinZ2d@comcast.com>

Jim Burton wrote:
> Or you could stop feeding the trolls.

People need to stop saying that. The original post was a detailed if incorrect 
exposition of Java information. How in the world do you rate that trollish?

I have absolutely no reason to rate the OP as a troll or their post as trollish.

-- Lew


From JHoover at fbi.gov  Mon Mar 12 15:39:58 2007
From: JHoover at fbi.gov (Gordon Airporte)
Date: Mon, 12 Mar 2007 15:39:58 -0400
Subject: Watching a file another app is writing
In-Reply-To: <mailman.4982.1173724335.32031.python-list@python.org>
References: <mailman.4982.1173724335.32031.python-list@python.org>
Message-ID: <Gt-dnSNvzbWSMWjYnZ2dnUVZ_rqhnZ2d@comcast.com>

Vishal Bhargava wrote:
> What kind of file is it? CSV?

It's a hand history file generated by an online poker client, thus it 
probably keeps it's data pretty much to itself otherwise, and in any 
case I'm not a Windows programmer so I probably don't have the stomach 
to get very deep into its process communication mechanisms.


> 
> It occurs to me under Unix you could perhaps get your first program to write
> to a "named pipe", which you 2nd program could read from. See
> 
> http://en.wikipedia.org/wiki/Named_pipe


From gregpinero at gmail.com  Thu Mar  1 10:58:45 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 1 Mar 2007 07:58:45 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <1172757183.819978.219440@v33g2000cwv.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
Message-ID: <1172764725.827624.298180@j27g2000cwj.googlegroups.com>

On Mar 1, 8:53 am, "Bart Ogryczak" <B.Ogryc... at gmail.com> wrote:
> On Mar 1, 7:52 am, "gregpin... at gmail.com" <gregpin... at gmail.com>
> wrote:
>
> > It seems like this would be easy but I'm drawing a blank.
>
> > What I want to do is be able to open any file in binary mode, and read
> > in one byte (8 bits) at a time and then count the number of 1 bits in
> > that byte.
>
> > I got as far as this but it is giving me strings and I'm not sure how
> > to accurately get to the byte/bit level.
>
> > f1=file('somefile','rb')
> > while 1:
> >     abyte=f1.read(1)
>
> import struct
> buf = open('somefile','rb').read()
> count1 = lambda x: (x&1)+(x&2>0)+(x&4>0)+(x&8>0)+(x&16>0)+(x&32>0)+
> (x&64>0)+(x&128>0)
> byteOnes = map(count1,struct.unpack('B'*len(buf),buf))
>
> byteOnes[n] is number is number of ones in byte n.


This solution looks nice, but how does it work?  I'm guessing
struct.unpack will provide me with 8 bit bytes (will this work on any
system?)

How does count1 work exactly?

Thanks for the help.

-Greg



From beliavsky at aol.com  Mon Mar  5 08:55:28 2007
From: beliavsky at aol.com (Beliavsky)
Date: 5 Mar 2007 05:55:28 -0800
Subject: Python stock market analysis tools?
In-Reply-To: <1173073290.907489.101150@t69g2000cwt.googlegroups.com>
References: <1173066776.884126.86810@64g2000cwx.googlegroups.com>
	<1173073290.907489.101150@t69g2000cwt.googlegroups.com>
Message-ID: <1173102924.803537.89930@c51g2000cwc.googlegroups.com>

On Mar 5, 12:41 am, "Raymond Hettinger" <pyt... at rcn.com> wrote:
> On Mar 4, 7:52 pm, "Mudcat" <mnati... at gmail.com> wrote:
>
> > I have done a bit of searching and can't seem to find a stock market
> > tool written in Python that is active. Anybody know of any? I'm trying
> > not to re-create the wheel here.
>
> What kind of tool do you want?  Getting quotes is the easy part:
>
> import urllib
> symbols = 'ibm jpm msft nok'.split()
> quotes = urllib.urlopen( 'http://finance.yahoo.com/d/quotes.csv?s='+
>          '+'.join(symbols) + '&f=l1&e=.csv').read().split()
> print dict(zip(symbols, quotes))
>
> The hard part is raising capital and deciding what to buy, sell, or
> hold.

Yes, and a discussion of investment approaches would be off-topic.
Unfortunately, newsgroups such as misc.invest.stocks are dominated by
spam -- the moderated newsgroup misc.invest.financial-plan is better.

Some research says that "mean variance portfolio optimization" can
give good results. I discussed this in a message

http://groups.google.com/group/misc.invest.financial-plan/msg/3b9d13f3d399050c?dmode=source
Newsgroups: misc.invest.financial-plan
From: beliavsky at aol.com
Date: Mon, 26 Feb 2007 12:47:25 -0600
Local: Mon, Feb 26 2007 1:47 pm
Subject: Re: Portfolio Optimization Software?

To implement this approach, a needed input is the covariance matrix of
returns, which requires historical stock prices, which one can obtain
using "Python quote grabber" http://www.openvest.org/Databases/ovpyq .

For expected returns -- hmmm. One of the papers I cited found that
assuming equal expected returns of all stocks can give reasonable
results.

Then one needs a "quadratic programming" solver, which appears to be
handled by the CVXOPT Python package.

If someone implements the approach in Python, I'd be happy to hear
about it.

There is a "backtest" package in R (open source stats package callable
from Python) http://cran.r-project.org/src/contrib/Descriptions/backtest.html
"for exploring portfolio-based hypotheses about financial instruments
(stocks, bonds, swaps, options, et cetera)."



From s.mientki at id.umcn.nl  Mon Mar 19 06:14:12 2007
From: s.mientki at id.umcn.nl (stef)
Date: Mon, 19 Mar 2007 11:14:12 +0100
Subject: from maple to python + numpy/scipy
In-Reply-To: <mailman.5277.1174297759.32031.python-list@python.org>
References: <mailman.5277.1174297759.32031.python-list@python.org>
Message-ID: <a7372$45fe6274$83aef404$16926@news1.tudelft.nl>

Daniel Nogradi wrote:
> I'm just getting started with numpy/scipy and first would like to get
> a view of what it can do and what it can't. The main idea is to move
> from maple to python and the first thing that poped up is the fact
> that maple is very convenient for both formal manipulations and exact
> integer calculations. For instance if a matrix has integer entries and
> the eigenvalues are integers maple can find these exactly.
>
> Can numpy/scipy do this? Or the eigenvalues will always be floating
> point numbers?
it might be better to ask this question on the scipy newsgroup
  SciPy Users List <scipy-user at scipy.org>

cheers,
Stef Mientki


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 20:44:15 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 22:44:15 -0300
Subject: Python-list Digest, Vol 42, Issue 117
References: <mailman.15559.1173404093.32030.python-list@python.org>
	<45F1D33F.1050909@optonline.net>
Message-ID: <op.tox9r1gzx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 18:35:59 -0300, Bart Willems <bwillems at optonline.net>  
escribi?:

> I'm sorry, but what's wrong with:
> radix = [ [] ] * 256

http://www.python.org/doc/faq/programming.html#how-do-i-create-a-multidimensional-list
http://www.python.org/doc/faq/general.html#why-are-default-values-shared-between-objects

-- 
Gabriel Genellina



From michael at jedimindworks.com  Sat Mar 24 22:35:10 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sat, 24 Mar 2007 21:35:10 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174758927.095854.167030@e65g2000hsc.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<1174758927.095854.167030@e65g2000hsc.googlegroups.com>
Message-ID: <B3801C2D-7E16-4F7B-9E15-D960004748DD@jedimindworks.com>


On Mar 24, 2007, at 12:55 PM, 7stud wrote:

> In addition, the download notes for the stand alone MacPython 2.5
> install say that there aren't as many modules for 2.5 as there are for
> the 2.4, which is something you may want to consider.

There aren't as many pre-built modules for 2.5 at the MacPython  
site.  That's not to say you can't easily build your own, mind you --  
assuming you've got developer tools installed.

regards,
Michael

---
A clever person solves a problem.
A wise person avoids it.
                                             -Albert Einstein






From john106henry at hotmail.com  Thu Mar  1 18:10:26 2007
From: john106henry at hotmail.com (John Henry)
Date: 1 Mar 2007 15:10:26 -0800
Subject: Matplotlib axes label
Message-ID: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>

I've been asking this question at the matplotlib user list and never
gotten an answer.  I am hoping that there are matplotlib users here
that can help.

My problem with matplotlib's way of handling axes label is illustrated
by this example:

http://www.scipy.org/Cookbook/Matplotlib/MulticoloredLine

Notice that the y-axis goes from (-1.1, 1.1) but the first label is at
-1.0.   I really don't like that because when I read values off the
graph, I have to keep reminding myself that the origin is at -1.1.
This may seem trivial but if you have to think, walk, chew gums at the
same time you're reading the graph, it gets annoying - particularly if
you have to read lots of these graphs.

Is there a way to force the label to start at -1.1 instead of -1.0?

Thanks,



From Gerald.Klix at klix.ch  Tue Mar 20 12:26:40 2007
From: Gerald.Klix at klix.ch (Gerald Klix)
Date: Tue, 20 Mar 2007 17:26:40 +0100
Subject: Wanted: a python24 package for Python 2.3
In-Reply-To: <1174406681.405930.237930@e1g2000hsg.googlegroups.com>
References: <45FFFEB6.2080403@pytex.org>
	<1174406681.405930.237930@e1g2000hsg.googlegroups.com>
Message-ID: <46000B40.3080504@klix.ch>

Hi,
You can't import subproces from future, only syntactic and semantic 
changes that will become standard feature in future python version can 
be activated that way.

You can copy the subprocess module from python 2.4 somewhere where it 
will be found from python 2.3. At least subporcess is importable after that:

--- snip ---
klix at vesuv6:~/ttt> cp -av /usr/local/lib/python2.4/subprocess.py .
?/usr/local/lib/python2.4/subprocess.py? -> ?./subprocess.py?
klix at vesuv6:~/ttt> python2.3
Python 2.3.3 (#1, Jun 29 2004, 14:43:40)
[GCC 3.3 20030226 (prerelease) (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import subprocess
 >>>
--- snip ---

HTH,
Gerald

kyosohma at gmail.com schrieb:
> On Mar 20, 10:33 am, Jonathan Fine <j... at pytex.org> wrote:
> 
>>Hello
>>
>>My problem is that I want a Python 2.4 module on
>>a server that is running Python 2.3.  I definitely
>>want to use the 2.4 module, and I don't want to
>>require the server to move to Python 2.4.
>>
>>More exactly, I am using subprocess, which is
>>new in Python 2.4.  What I am writing is something
>>like
>>===
>>from subprocess import Popen
>>===
>>
>>This will fail in Python 2.3, in which case I
>>would like to write something like
>>===
>>try:
>>     from subprocess import Popen
>>else ImportError:
>>     from somewhere_else import Popen
>>===
>>
>>Put this way, it is clear (to me) that somewhere_else
>>should be python24.
>>
>>In other words, I'm asking for a python24 package that
>>contains all (or most) of the modules that are new to
>>Python 2.4.
>>
>>I've looked around a bit, and it seems that this
>>formulation of the solution is new.  I wonder if
>>anyone else has encountered this problem, or has
>>comments on my solution.
>>
>>--
>>Jonathan
> 
> 
> You might be able to use the "from future import SomeModule" syntax to
> accomplish this, but I am not sure. Other than that, I would just
> recommend using the os.popen calls that are native to 2.3
> 
> Mike
> 



From s.mientki at id.umcn.nl  Fri Mar 30 08:55:43 2007
From: s.mientki at id.umcn.nl (stef)
Date: Fri, 30 Mar 2007 14:55:43 +0200
Subject: Library for windows ini-files ?
In-Reply-To: <euito5$ntl$1@news2.u-psud.fr>
References: <1b387$460cf3fd$83aef404$10944@news2.tudelft.nl>
	<euito5$ntl$1@news2.u-psud.fr>
Message-ID: <8e1f6$460d08cf$83aef404$17326@news2.tudelft.nl>

Laurent Pointal wrote:
> stef a ?crit :
>   
>> hello,
>>
>> is there a Python library for easy reading and writing windows ini-files ?
>>     
>
> http://docs.python.org/lib/module-ConfigParser.html
>
> A+
>
> Laurent.
>   
thanks Laurent,
that seems to be what I was looking for.

cheers,
Stef


From rhc28 at cornell.edu  Fri Mar  2 12:07:13 2007
From: rhc28 at cornell.edu (Rob Clewley)
Date: Fri, 2 Mar 2007 12:07:13 -0500
Subject: ANN: PyDSTool now compatible with numpy 1.0.1,
	scipy 0.5.2 and 64-bit CPUs.
In-Reply-To: <1172579296.156674.203150@j27g2000cwj.googlegroups.com>
References: <mailman.4239.1172001680.32031.python-list@python.org>
	<2ff9b$45db652f$d443bb3a$29705@news.speedlinq.nl>
	<1172579296.156674.203150@j27g2000cwj.googlegroups.com>
Message-ID: <a749952d0703020907r5e699e43wae9a2cf421070dcb@mail.gmail.com>

Mike,

Yes, that is a pretty fair description of our support for symbolics
using Python's own inheritance. Our ModelSpec classes provide only an
elementary form of inheritance, polymorphism and type checking. We
hope to expand our existing support for hybrid/DAE systems at the
level of our ModelSpec model-building tools. All ideas and code
contributions are welcome!

Cheers,
Rob


From andmarti at gmail.com  Mon Mar 19 01:12:39 2007
From: andmarti at gmail.com (andmarti at gmail.com)
Date: Mon, 19 Mar 2007 02:12:39 -0300
Subject: struct.pack returns nothing
Message-ID: <20070319051239.GA8214@lacordilleraandina.com.ar>

If I build a strict with:

import struct
print struck.pack ('i', 1)

it returns a '\n'.
What's wrong with it???
:(

-- 
Andr?s M.
---------------------------------------------


From irstas at gmail.com  Mon Mar 26 12:50:20 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 26 Mar 2007 09:50:20 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174925704.394888.18170@d57g2000hsg.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
	<1174854156.298431.68150@n59g2000hsh.googlegroups.com>
	<XcOdnTRJmdpteZvbnZ2dnUVZ_qSrnZ2d@comcast.com>
	<1174925704.394888.18170@d57g2000hsg.googlegroups.com>
Message-ID: <1174927820.575669.101990@p15g2000hsd.googlegroups.com>

On Mar 26, 7:15 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> On Mar 25, 3:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
>
> > Here's another way of looking at it::
>
> >      >>> class Test(object):
> >      ...     pass
> >      ...
> >      >>> def greet():
> >      ...     print 'Hello'
> >      ...
> >>> Test.greet = greet
> >>> Test.greet
> >   <unbound method Test.greet>
>
> Interesting.  After playing around with that example a bit and finally
> thinking I understood bound v. unbound, I found what appears to be an
> anomaly:
> ------------
> class Test(object):
>         pass
>
> def greet(x):
>         print "hello"
>
> Test.func = greet
> print Test.func
>
> t = Test()
> print t.func
>
> def sayBye(x):
>         print "bye"
>
> t.bye = sayBye
> print t.bye
> ------------output:
> <unbound method Test.greet>
> <bound method Test.greet of <__main__.Test object at 0x6dc50>>
> <function sayBye at 0x624b0>
>
> Why doesn't t.bye cause a method object to be created?

Because that would be bad and unexpected behaviour. I might want to
store callback functions to an object as attributes. It wouldn't make
sense for the functions to be bound to the container object when I'd
access them.

Of course, "Test.func = greet; print Test.func" is also "unexpected
behaviour" as Test.func is not same as Test.__dict__['func']. But it's
unexpected in a good way, because it facilitates the way classes are
usually used. The whole point of the magic is to make common idioms
simple.



From taurelin at gmail.com  Fri Mar  9 11:53:48 2007
From: taurelin at gmail.com (Arne Jamtgaard)
Date: 9 Mar 2007 08:53:48 -0800
Subject: Problem with new Vista and os.system
Message-ID: <1173459228.574405.213280@h3g2000cwc.googlegroups.com>

I'm getting myself set up on a new Vista box at work, and one of my
old scripts has stopped working.

Specifically, all calls to os.system return a -1.  Whatever action I
was
asking os.system to run does not take place.

Is this a Vista thing, or perhaps just a wonky setting in my
environment.

Oh, python 2.5.

Arne



From aleax at mac.com  Fri Mar 23 10:47:04 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 23 Mar 2007 07:47:04 -0700
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
Message-ID: <1hvf41r.136f636r1ft4cN%aleax@mac.com>

Mark <markbpan at mailinator.com> wrote:
   ...
> so I could just do a "python_compile_and_run myscript.py" and it would
> do what I want, i.e. run myscript.pyc if available and valid, generate
> and run it if necessary.

You can use

python -c 'import myscript; myscript.main()'

and variations thereon.


Alex


From rewire at gmail.com  Wed Mar 14 08:45:35 2007
From: rewire at gmail.com (Divya)
Date: 14 Mar 2007 05:45:35 -0700
Subject: IronPython and COM Interface
Message-ID: <1173876334.993319.34430@n59g2000hsh.googlegroups.com>

Hello,

I'm new to IronPython and COM so please bear with me.

I have a COM interface provided to me. I need to implement this
interface and pass it to a method as a way of implementing
'callbacks'.

However it appears that the methods of my interface object are never
called.

As a alternative, I implemented the interface in C# and then extended
the C# class in IronPython. However, on running the code, methods of
my C# class rather than the IronPython class are being called.

Can anyone advise? Is this possible in IronPython?

The code is listed below.

Regards,
Divya

---------------------------

import time

import clr
clr.AddReference('Interop.MBTCOMLib.dll')
clr.AddReference('Interop.MBTORDERSLib.dll')
clr.AddReference('Interop.MBTQUOTELib.dll')

import MBTCOMLib
import MBTORDERSLib
import MBTQUOTELib

demo_user='user'
demo_pass='pass'
demo_host=9

class MBEvents(MBTQUOTELib.IMbtQuotesNotify):
	def __init__(self):
		MBTQUOTELib.IMbtQuotesNotify.__init__(self)

	def OnLevel2Data(data):
		print 'OnLevel2Data'

	def OnOptionsData(self, data):
		print 'OnOptionsData'

	def OnQuoteData(self, data):
		print 'OnQuoteData'

	def OnTSData(self, data):
		print 'OnTSData'

class MB:
	def __init__(self):
		self.conn = MBTCOMLib.MbtComMgrClass()
		#self.conn.EnableSplash(False)
		self.orders = self.conn.OrderClient
		self.quotes = self.conn.Quotes
		self.events = MBEvents()

	def login(self, host=demo_host, user=demo_user, passwd=demo_pass):
		self.conn.DoLogin(host, user, passwd, '')
		print self.quotes.RemoteAddress, self.quotes.RemotePort
		self.quotes.AdviseSymbol(self.events, 'EUR/USD', 1|2|3|4)



From proteusguy at gmail.com  Mon Mar 19 05:30:54 2007
From: proteusguy at gmail.com (proteusguy at gmail.com)
Date: 19 Mar 2007 02:30:54 -0700
Subject: keyword arguments for xml-rpc
Message-ID: <1174296653.983861.47630@o5g2000hsb.googlegroups.com>

    I've just noticed that I can't seem to use keyword arguments for
xml-rpc requests even though the protocol itself encodes parameter
names, types, and values when it sends the xml across the network.
This becomes a bit problematic for me because I want to store some XML-
RPC method dispatch signatures in a database and can't easily
guarantee parameter order when I load it so being able to pass a
dictionary of name/value pairs greatly eases the development effort
and helps assure correct methods get invoked. Is this a limitation of
the SimpleXMLRPCServer, the xmlrpclib.ServerProxy, or something
completely different?



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  2 15:13:02 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 02 Mar 2007 21:13:02 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
Message-ID: <54reqdF22ck5iU1@mid.individual.net>

Thomas Dybdahl Ahle wrote:

> However I'd really like not to use the lambda, as it slows down
> the code.

Did you check how much the slowdown is?
 
Regards,


Bj?rn

-- 
BOFH excuse #65:

system needs to be rebooted



From pecora at anvil.nrl.navy.mil  Sat Mar 10 12:16:19 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 10 Mar 2007 12:16:19 -0500
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<pan.2007.03.09.15.33.01.991831@gmx.net>
	<pecora-0239F9.11184709032007@ra.nrl.navy.mil>
	<DThIh.10891$tD2.1731@newsread1.news.pas.earthlink.net>
Message-ID: <pecora-82A798.12161910032007@ra.nrl.navy.mil>

In article <DThIh.10891$tD2.1731 at newsread1.news.pas.earthlink.net>,
 Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:

> 
> 	Expected behavior if you 1) understand how Python variable binding
> works, and 2) that "from <> import *" is equivalent to
> 
> import <>
> name1 = <>.name1
> name2 = <>.name2
> 
> 	IOWs, one is creating local names that are bound to the objects
> inside the imported module. If, subsequently, one does
> 
> name2 = 123
> 
> one has UNbound the connection to <>.name2 and rebound the local name to
> the integer object 123. Whereas 
> 
> <>.name2 = 123 
> 
> says "go into the module <>, and rebind its 'name2' to the integer
> object 123"; since you "went inside" to do the rebinding, any other code
> that also uses the <>.name2 reference will see the change inside <>.


Ah! (light bulb goes on)  Yes, I get it.  Thanks.  No more from ** 
import *.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From savalon at ukr.net  Wed Mar 21 04:12:01 2007
From: savalon at ukr.net (Orin)
Date: Wed, 21 Mar 2007 10:12:01 +0200
Subject: coverage.py problem
In-Reply-To: <17919.4374.192994.456090@montanaro.dyndns.org>
Message-ID: <E1HTvvN-000EHg-EV@ffe2.ukr.net>


Thank you very much. Just reading the comments on that url, I found the reason of my problem. 

It was here:

--- coverage.py 
+++ coverage.py 
@@ -464,6 +464,8 @@

def collect(self): 
cache_dir, local = os.path.split(self.cache) 
+ if not cache_dir:   #this two strings was upsent
+ cache_dir = "." 
for file in os.listdir(cache_dir): 
if not file.startswith(local): 
continue				

With best regards, Orin				


From steve at REMOVEME.cybersource.com.au  Tue Mar 27 23:00:33 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 28 Mar 2007 13:00:33 +1000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916449.171929.138950@n76g2000hsh.googlegroups.com>
	<pan.2007.03.26.22.17.16.194451@REMOVE.THIS.cybersource.com.au>
	<46095e24$1@nntp.zianet.com>
Message-ID: <pan.2007.03.28.03.00.33.30725@REMOVEME.cybersource.com.au>

On Tue, 27 Mar 2007 12:11:01 -0600, Erik Johnson wrote:

>     But seriously... I'm not a language or architecture guru.  Is there any
> real difference between a JVM and an interpreter? I mean, I have some
> general feel that bytecode is a lower-level, more direct and more efficient
> thing to be interpreting that Java or Python source, but at the bottom
> level, you are still running an interpreter which is going to be
> (significantly?) more inefficient than executing native machine instructions
> directly on the CPU, right?

Thirty (or more?) years ago, the differences between compilers and
interpreters was fairly large. Interpreters would scan the source code of
each and every line. If you had a loop, each line in the loop would be
parsed each time around the loop. Despite 30+ years of progress, that's
still the model that many (most?) people have in their head when they
think of "interpreted language". That's why "interpreted" is the Kiss of
Death to anyone interested in speed -- whether true or not.

def if_(): # interpreted function
    exec 'x = 0'
    exec """for i in range(100):
    exec 'x += i'"""
    return x

def cf(): # compiled function
    x = 0
    for i in range(100):
        x += i
    return x

>>> timeit.Timer('cf()', 'from __main__ import cf').repeat(3, 1000)
[0.054703950881958008, 0.038740158081054688, 0.041306018829345703]
>>> timeit.Timer('if_()', 'from __main__ import if_').repeat(3, 1000)
[16.228797912597656, 16.261317014694214, 15.885524034500122]


But these days, and probably for the last decade at least, the nice neat
lines between "compiled" and "interpreted" is much fuzzier. So-called
interpreted languages don't parse the source code every time it is run.
They compile to byte-code, which is interpreted in a virtual machine in
the same way that compiled code is interpreted in a real machine.

Even that distinction isn't necessarily cut and dried. On modern CPUs,
machine code itself can be implemented in a mini-language, which naturally
is interpreted by an interpreter built into the CPU. The "real" machine on
the CPU is likely to itself include "virtual" machines, up to and
including entire emulators of other CPUs.

(Note: for each and every generalization I have made, there are almost
certainly exceptions. I think that just supports my contention that the
generalizations about "compiled" and "interpreted" languages are more
misleading than useful.)


>     Why is Python able to automatically compile source into bytecode on the
> fly (when needed) but Java still forces you to do so explicitly?

That probably has more to do with different programming models than
different technologies. I'm sure somebody could build an interactive
complier/interpreter for Java like Python's. If nobody has, it is probably
more to do with nobody seeing the need of such than because it can't be
done.

I suspect that the advantages of an interactive system are much less for
languages like Java that have static type declarations.


>     I don't mean to bash Java - I think it has it's place as well, but I
> mean to note that Java is very carefully marketed whereas Python's image is
> not managed by a major, international corporation.

Exactly. And that's why I think it does Python no favours at all to
keep emphasising the interpreter over the compiler. It gives too many
people the wrong idea.



-- 
Steven D'Aprano 



From john.pye at gmail.com  Wed Mar 21 23:09:51 2007
From: john.pye at gmail.com (John Pye)
Date: 21 Mar 2007 20:09:51 -0700
Subject: splitting perl-style find/replace regexp using python
In-Reply-To: <es6c7m$1k8$00$2@news.t-online.com>
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
	<es6c7m$1k8$00$2@news.t-online.com>
Message-ID: <1174532991.858501.290610@e1g2000hsg.googlegroups.com>

Thanks all for your suggestions on this. The 'splitter' idea was
particularly good, not something I'd thought of. Sorry for my late
reply.



From skip at pobox.com  Wed Mar 21 09:49:33 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 21 Mar 2007 08:49:33 -0500
Subject: Garbage collection
In-Reply-To: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
Message-ID: <17921.14317.94569.747087@montanaro.dyndns.org>

    Tom> I suspect I may be missing something vital here, but Python's
    Tom> garbage collection doesn't seem to work as I expect it to.  Here's
    Tom> a small test program which shows the problem on python 2.4 and 2.5:

    Tom> (at this point, Python is using 15MB)

    >>> a = range(int(1e7))
    >>> a = None
    >>> import gc
    >>> gc.collect()
    0

    Tom> (at this point, Python is using 252MB)

    Tom> Is there something I've forgotten to do? Why is Python still using
    Tom> such a lot of memory?

You haven't forgotten to do anything.  Your attempts at freeing memory are
being thwarted (in part, at least) by Python's int free list.  I believe the
int free list remains after the 10M individual ints' refcounts drop to zero.
The large storage for the list is grabbed in one gulp and thus mmap()d I
believe, so it is reclaimed by being munmap()d, hence the drop from 320+MB
to 250+MB.

I haven't looked at the int free list or obmalloc implementations in awhile,
but if the free list does return any of its memory to the system it probably
just calls the free() library function.  Whether or not the system actually
reclaims any memory from your process is dependent on the details of the
malloc/free implementation's details.  That is, the behavior is outside
Python's control.

Skip


From tinaweb at bestemselv.com  Mon Mar 26 02:27:19 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Mon, 26 Mar 2007 08:27:19 +0200
Subject: __init__.py
In-Reply-To: <q8ydnRG5jr36-prbRVnzvA@telenor.com>
References: <q8ydnRG5jr36-prbRVnzvA@telenor.com>
Message-ID: <q8ydnRC5jr1a-prbRVnzvA@telenor.com>

Tina I wrote:
> When looking at other peoples code (to learn from it) I keep seeing an 
> empty file named "__init__.py". What's the purpose of this?
> 
> Thanks
> Tina

Duh! Never mind... found it.
Kinda neat actually :)

T


From Robert.Katic at gmail.com  Sun Mar  4 13:06:07 2007
From: Robert.Katic at gmail.com (goodwolf)
Date: 4 Mar 2007 10:06:07 -0800
Subject: class attrdict
In-Reply-To: <1hufw45.os60h3bkuqh9N%aleax@mac.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1173009806.383478.50230@i80g2000cwc.googlegroups.com>
	<1hufw45.os60h3bkuqh9N%aleax@mac.com>
Message-ID: <1173031567.734026.292940@30g2000cwc.googlegroups.com>

class Namespace(object):
    def __init__(self, __ns=None, **kwargs):
        if __ns is None:            #if no dictionary is given
            self.__dict__ = kwargs  #then use kwargs without copying
or creating new dict
        else:
            assert len(kwargs) == 0
            self.__dict__ = __ns    #else use dictionary without
copyng

     #additional methods for JS like object (ONLY FOR DEMONSTRATION)
     def __getitem__(self, name):
        return getattr(self, name)
    def __setitem__(self, name, value):
        setattr(self, name, value)
    def __delitem__(self, name):
        delattr(self, name)
    def __iter__(self):
        return iter(self.__dict__)
    def __contains__(self, name):
        return hasattr(self, name)



From rhc28 at cornell.edu  Mon Mar  5 22:17:54 2007
From: rhc28 at cornell.edu (Rob Clewley)
Date: Mon, 5 Mar 2007 22:17:54 -0500
Subject: ANN: PyDSTool now compatible with numpy 1.0.1,
	scipy 0.5.2 and 64-bit CPUs.
In-Reply-To: <1173135681.180640.209810@30g2000cwc.googlegroups.com>
References: <mailman.4239.1172001680.32031.python-list@python.org>
	<2ff9b$45db652f$d443bb3a$29705@news.speedlinq.nl>
	<1172579296.156674.203150@j27g2000cwj.googlegroups.com>
	<mailman.4607.1172855235.32031.python-list@python.org>
	<1173135681.180640.209810@30g2000cwc.googlegroups.com>
Message-ID: <a749952d0703051917k6c4333c1jbff64d00214505a2@mail.gmail.com>

This kind of comment comes up often, so I think it's worth spelling
out a response that will persist on the web and can appear in our FAQ.

I have a different and admittedly limited view of hybrid systems as
part of dynamical systems theory. In principle, I would love to have
time to write an interface to something like Modelica, but PyDSTool
isn't intended as an industrial-scale simulation package: it is
intended for applied dynamical systems research involving small
systems that people want to analyze with tools like bifurcation theory
and parameter estimation. I also want to switch components in and out
of a model with minimum overhead as part of model estimation and
parameter estimation routines that remain an open research area.
Partly for this reason I don't want to start depending on large
external packages, most features of which people may never be needed.
Given my present purposes the overhead of writing an interface is a
demanding sink of my time when basic (essentially prototype) tools
suffice in the short term. That is also why I am not planning a
graphical UI at this time. (The related DsTool and XPP packages
already have GUIs.)

I appreciate the idea of outsourcing to take advantage of good work in
areas such as yours.  I hope to step up to that bar later on as part
of an ongoing research project connected to me, which involves
studying the mechanisms of locomotion in insects. There are other
mechanical simulation packages that I would like to interface to (most
are commercial), but on close inspection it turns out there's a lot of
very technical issues involved -- although at least modelica is open
source! Sorry to be taking a short-term view here (I try to avoid
that), but we're just a couple of guys trying to concentrate on our
day jobs...

Rob


From jan.m.danielsson at gmail.com  Tue Mar 27 09:30:38 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Tue, 27 Mar 2007 15:30:38 +0200
Subject: Modules & positive surprises
Message-ID: <46091c7e$1@griseus.its.uu.se>

Hello all,

<IMHO>

   Although I have encountered many modules that have impressed me with
regards to what they can actually do -- too be perfectly honest, it's
very rare that I become impressed by the _interfaces_ to the modules.

   Using a new module is normally, with my - admittedly - limited
experience, a pain. It's not just about reading the reference material,
and then just use it. You have to figure out how the developer who wrote
the module was thinking. Often there's a (more or less) natural way to
do things, and unfortunately that's not how module developers do it.
It's not a major issue to me personally, since the important part is
that the module can perform its function.

   But then there are a few modules that I just love to use, because
they are so "clean" from interface to function. Among them I can't help
mentioning optparse.

   Yesterday I found another module which I fell in love with: Python
Cryptography Toolkit (http://www.amk.ca/python/writing/pycrypt/).

   It's just so ... elegant, and functional.

</IMHO>

-- 
Kind regards,
Jan Danielsson


From paddy3118 at googlemail.com  Thu Mar 29 18:44:56 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 29 Mar 2007 15:44:56 -0700
Subject: Modal value of an array
In-Reply-To: <1hvpovd.1anin2by4gjl1N%aleax@mac.com>
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
	<1hvpovd.1anin2by4gjl1N%aleax@mac.com>
Message-ID: <1175208296.769865.186480@r56g2000hsd.googlegroups.com>

On Mar 29, 8:49 am, a... at mac.com (Alex Martelli) wrote:
> Ben Finney <bignose+hates-s... at benfinney.id.au> wrote:
>
>    ...
>
> > That's not the only case though. What do you expect to be returned for
> > an input of ["eggs", "beans", "beans", "eggs", "spam"] ?
>
> > Assuming you want *a* mode value, and any one will do (e.g. any of
> > "spam", "eggs" or "beans" is okay), I'd write it this way as a first
> > guess:
>
> >     >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> >     >>> counts = [(foo.count(val), val) for val in set(foo)]
> >     >>> counts
> >     [(2, 'eggs'), (1, 'beans'), (4, 'spam')]
> >     >>> sorted(counts)[-1]
> >     (4, 'spam')
> >     >>> sorted(counts)[-1][1]
> >     'spam'
>
> A bit more directly:
>
> >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> >>> max(foo, key=foo.count)
>
> 'spam'
>
> Alex

This doesn't call foo.count for duplicate entries by keeping a cache

>>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
>>> def cachecount(x, cache={}):
... 	return cache.setdefault(x, foo.count(x))
...
>>> max(foo, key=cachecount)
'spam'
>>> cachecount.func_defaults
({'eggs': 2, 'beans': 1, 'spam': 4},)
>>>

- Paddy.



From http  Wed Mar 14 11:50:55 2007
From: http (Paul Rubin)
Date: 14 Mar 2007 07:50:55 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<1173861843.878008.83090@p15g2000hsd.googlegroups.com>
Message-ID: <7xps7bbz8g.fsf@ruckus.brouhaha.com>

"Raymond Hettinger" <python at rcn.com> writes:
> Since people are posting their solutions now (originally only hints
> were provided for the homework problem), here's mine:
> 
> def genpool(n, m):
>     if n == 1:
>         yield [m]
>     else:
>         for i in xrange(1, m):
>             for rest in genpool(n-1, m-i):
>                 yield rest + [i]
> 
> import random
> print random.choice(list(genpool(n=4, m=20)))

This generates a lot of the partitions more than once, with
possibly unequal probability.


From jstroud at mbi.ucla.edu  Mon Mar 19 05:16:43 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 19 Mar 2007 09:16:43 GMT
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
Message-ID: <%xsLh.14400$FG1.1735@newssvr27.news.prodigy.net>

momobear wrote:
> hi, I am puzzled about how to determine whether an object is
> initilized in one class, anyone could give me any instructions?
> here is an example code:
> 
> class coffee:
>          def  boil(self):
>                self.temp = 80
> 
> a = coffer()
> if a.temp > 60:
>      print "it's boiled"
> 
> in C++ language we must initilized a variable first, so there is no
> such problem, but in python if we don't invoke a.boil(), we will not
> get self.temp to be initilized, any way to determine if it's initilzed
> before self.temp be used.
> 

I think you might be looking for hasattr:

class coffee:
   def boil(self):
     if hasattr(self, 'temp') and self.temp > 60:
       print "Its boilt, yo."
     else:
       self.temp = 80

Other ways to do this are try/except:


class coffee:
   def boil(self):
     try:
       if self.temp > 60:
         print "Its bizzle, yo."
         return
     except AttributeError:
       pass
     self.temp = 80


Which is not so good in my opinion because it takes too much typing and 
makes your fingers hurt at the very tips.

A fun way is with dict.setdefault which might actually be cleanest, but 
you loose testing the precondition for the print:

class coffee:
   def boil(self):
     if self.__dict__.setdefault('temp', 80) > 60:
       print "Its bizzle m'wizzle."


py> c = coffee()
py> c.temp
Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
AttributeError: coffee instance has no attribute 'temp'
py> c.boil()
Its bizzle m'wizzle.
py> c.temp
80


Of course, the idea is that, in classes, you will be intimately aware of 
the attributes of your class via __init__, as others have mentioned, so 
you should never really resort to any of the above.

James


From scuba.margie at gmail.com  Thu Mar 22 23:45:27 2007
From: scuba.margie at gmail.com (scuba.margie at gmail.com)
Date: 22 Mar 2007 20:45:27 -0700
Subject: Cool new website
Message-ID: <1174621527.601045.166590@n76g2000hsh.googlegroups.com>

Brand new site.

Loads of great stuff

Free membership and full access

Check out Yapooh!

http://www.yapooh.org



From public21 at lakeweb.com  Sat Mar 10 15:23:27 2007
From: public21 at lakeweb.com (Dan Bloomquist)
Date: Sat, 10 Mar 2007 20:23:27 GMT
Subject: Phase change material ...
In-Reply-To: <1173554707.826932.246100@30g2000cwc.googlegroups.com>
References: <1173405474.489111.139350@p10g2000cwp.googlegroups.com>
	<1173554707.826932.246100@30g2000cwc.googlegroups.com>
Message-ID: <3tEIh.4571$B25.683@news01.roc.ny>

thermate at india.com wrote:

> On Mar 8, 5:57 pm, "martinl" <goo... at mllengineering.ca> wrote:
> 
>>Hi All,
>>I'm looking for a substance that does a phase change at between 60 and
>>100 C.
>>
>>I need something with a high heat capacity so that when it cools
>>through the phase change, it stays at the freezing temperature for as
>>long as possible.
>>
>>Also it needs to be non toxic since it will be handled.
>>
>>Any thoughts?

I settled for hurricane wax. (IGI-1260). But that, because I felt it 
would suit my application, domestic heating. I have 3 thousand pounds of 
the stuff.

> If you want to arrest the temperature of your system using phase
> transformation, you probably need good thermal conductivity of the
> phase change material.

My biggest concern as I build the heat exchangers. Here is a photo at a 
previous state.

http://lakeweb.com/boiler/tubes.jpg

The tubes on the left are for steam condensation. I didn't think I would 
need to cover the volume that well with them because the wax will melt 
around them and convection currents will distribute the heat. But the 
heat sink tubing, (two rows on the right), are double and much longer 
with back and forth winding. When all the tubing is in there will be 
much vertical support, brazed, half inch EMT. The coefficient of 
expansion for wax is up there and I don't want the solid wax building on 
the tubes to sag the copper. And, more surface area for the exchanger. I 
had thought of running FEA on this but would have downloaded free 
software. I figured I lack the skill to make the time invested work out.

The average distance from far points to the heat exchanger will be some 
3-4 inches. And, the heat will be moved out on the scale of hours. The 
only time I could see having trouble is on the very coldest nights and 
having to bring the house back up to temperature in the morning.

The contingency plan for that is I load the boiler with some wood in the 
evening and it autostarts very early in the morning for those coldest 
nights.


Best, Dan.



From bj_666 at gmx.net  Sat Mar  3 03:10:14 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 03 Mar 2007 09:10:14 +0100
Subject: Perl and Python, a practical side-by-side example.
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45e8c931$0$8646$426a34cc@news.free.fr>
	<54sl5dF21mn73U1@mid.individual.net>
Message-ID: <pan.2007.03.03.08.10.13.312600@gmx.net>

In <54sl5dF21mn73U1 at mid.individual.net>, Bjoern Schliessmann wrote:

> Bruno Desthuilliers wrote:
>> Shawn Milo a ?crit :
> 
>>>     if recs.has_key(piid) is False:
>> 
>> 'is' is the identity operator - practically, in CPython, it
>> compares memory addresses. You *dont* want to use it here.
> 
> It's recommended to use "is None"; why not "is False"? Are there
> multiple False instances or is False generated somehow?

Before `True` and `False` existed many people defined them as aliases to 1
and 0.  And of course there are *many* other objects that can be used in a
boolean context of an ``if`` statement for testing "trueness" and
"falseness".

Ciao,
	Marc 'BlackJack' Rintsch


From larry.bates at websafe.com  Fri Mar 30 11:55:08 2007
From: larry.bates at websafe.com (Larry Bates)
Date: Fri, 30 Mar 2007 10:55:08 -0500
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
Message-ID: <460D32DC.4060104@websafe.com>

kevinliu23 wrote:
> Hey guys,
> 
> I want to be able to insert a '-' character in front of all numeric
> values in a string. I want to insert the '-' character to use in
> conjunction with the getopt.getopt() function.
> 
> Rigt now, I'm implementing a menu system where users will be able to
> select a set of options like "2a 3ab" which corresponds to menu
> choices. However, with getopt.getopt(), it'll only return what I want
> if I input -2a -3ab as my string. I don't want the user have to insert
> a '-' character in front of all their choices, so I was thinking of
> accepting the string input first, then adding in the '-' character
> myself.
> 
> So my qusetion is, how do I change:
> 
> "2a 3ab" into "-2a -3ab".
> 
> Regular expressions? :/
> 
s="2a 3b"
s="-%s -%s"% tuple(s.split())

-Larry


From jjl at pobox.com  Sat Mar 24 11:16:37 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 24 Mar 2007 15:16:37 GMT
Subject: [JOB] Sr. Python Developer, Northern VA
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
	<etul70$l3b$1@news4.zwoll1.ov.home.nl> <87aby59dy1.fsf@pobox.com>
	<etv1mu$uuu$1@news1.zwoll1.ov.home.nl>
Message-ID: <87wt167jts.fsf@pobox.com>

Anton Vredegoor <anton.vredegoor at gmail.com> writes:
> John J. Lee wrote:
[...]
> > but I'm sure you appreciate the point -- if you're hiring employees,
> > being fairly risk-averse is probably quite rational.
> 
> So when we really mean business, you're back to static typing?

I'm not wedded to dynamic typing, as it happens.  Of course, if I
were, I would have to take it as a metaphor for all of life ;-)

[...]
> Well, on my next leisurely stroll along the river side, I will
> consciously enjoy the freedom of currently having no job instead of
> the usual "I'm lucky I have no kids to worry about", just to humor you!

Bastard :-)


John


From gagsl-py2 at yahoo.com.ar  Thu Mar 29 15:45:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 29 Mar 2007 16:45:08 -0300
Subject: Question about details of __import__
References: <20070329104233.2129d267@opal.pathscale.com>
	<op.tpyrm8p5x6zn5v@gabriel2.softlabbsas.com.ar>
	<20070329115654.5455dd96@opal.pathscale.com>
Message-ID: <op.tpyuhizax6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 29 Mar 2007 15:56:54 -0300, Mitko Haralanov <mitko at qlogic.com>  
escribi?:

>> You may check if this is the case, looking at sys.modules
>
> I did look at sys.modules but I wasn't sure what to look for. There was
> a log module in the list but what else should I look for?

If you think that Python got confused and has two duplicate modules, try  
to find them in sys.modules. Perhaps under the names 'log' and 'xxx.log'
Or, using print, try to see *when* your global variable is reset to None.

-- 
Gabriel Genellina



From jgodoy at gmail.com  Wed Mar 14 21:08:48 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Wed, 14 Mar 2007 22:08:48 -0300
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
	<1173581125.663707.5810@s48g2000cws.googlegroups.com>
	<87odmvinhf.fsf@pobox.com>
	<Hh0Kh.3232$Qw.920@newssvr29.news.prodigy.net>
	<871wjrs4vo.fsf@pobox.com>
Message-ID: <87ps7bz527.fsf@gmail.com>

jjl at pobox.com (John J. Lee) writes:

> John Nagle <nagle at animats.com> writes:
>
>> John J. Lee wrote:
>> > "Graham Dumpleton" <Graham.Dumpleton at gmail.com> writes:
>> >
>> >>On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
>> 
>> > Is it possible to ask mod_python to start separate processes to serve
>> > requests, rather than "separate" interpreters?  We couldn't see a way.
>> 
>>     That's what CGI does.
>
> I meant long running processes, as I hoped was obvious from context...

Maybe FastCGI should help, then.  It can run "forever" after a request has
finished so it is suitable for long running processes. 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From lbates at websafe.com  Tue Mar 13 18:50:37 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 13 Mar 2007 17:50:37 -0500
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
Message-ID: <NIWdnbz1EMIkt2rYnZ2dnUVZ_o6gnZ2d@comcast.com>

israphelr at googlemail.com wrote:
> Hi all.
> 
> I have a problem with some code :(
> 
> -----------
> 
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
> 
> while (hint != 'n') or (hint != 'y'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> so everytime I run the program, and enter my choice as y or n, I'm
> told to 'Please Specify a valid Choice Again' and can't get out of the
> loop.
> 
> 
> 
> -----------
> 
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
> 
> while (hint != 'n'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> As for here when I enter n, I can leave the while loop.
> 
> Anyway I can't put my finger on this, so I'd be real grateful if
> someone could tell me what I've done wrong. Thanks.
> (I have a guy feeling it's something really silly I'm overlooking...)
> 

Your if test is wrong.

If hint='n'

hint !='n' is False
hint !='y' is True

False or True equals True

I think you want something like:

hint = raw_input("\nAre you stuck? y/n: ")
hint = hint.lower()

while hint not in ['y', 'n']:
    hint = raw_input("Please specify a valid choice: ")

-Larry


From robert.kern at gmail.com  Tue Mar 13 23:20:05 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 13 Mar 2007 22:20:05 -0500
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <1173841694.932998.290390@d57g2000hsg.googlegroups.com>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>	<mailman.5051.1173838059.32031.python-list@python.org>
	<1173841694.932998.290390@d57g2000hsg.googlegroups.com>
Message-ID: <et7pl9$cch$1@sea.gmane.org>

vj wrote:
>> Note that the mask needs to be a bool array.
> 
>>>> mask = zeros(5)
>>>> mask = zeros(5, numpy.int8)
>>>> mask[1] = True
>>>> mask[2] = True
>>>> a = zeros(5)
>>>> a[mask] = [100, 200]
>>>> a
> array([ 100.,  100.,    0.,    0.,    0.])
> 
> I found this strange. It should just give an error if you try to use a
> mask array of non booleans.

No, it simply does something different. Boolean arrays apply as a mask. Integer
arrays apply as indices into the array.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From eddie at holyrood.ed.ac.uk  Mon Mar 26 07:00:07 2007
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Mon, 26 Mar 2007 11:00:07 +0000 (UTC)
Subject: Need help to learn Python
References: <mailman.5554.1174756214.32031.python-list@python.org>
Message-ID: <eu893n$gke$1@scotsman.ed.ac.uk>

"wesley chun" <wescpy at gmail.com> writes:

>with that said, i would still like to state that the book's target
>audience is for people who know how to program but need to pick up
>Python as quickly as possible.  the "theory" that's in the book is
>really more explanation of how the Python interpreter works,
>especially the relationship between objects and memory management.
>the goal is to give you enough of an understanding of how Python works
>"under the covers" that you will write very effective code, even as a
>beginner to the language.

Worked for me.  The 1/e was the easiest intro to a language I've ever read.
(I don't suppose you fancy doing one for Ruby :)

Eddie


From bignose+hates-spam at benfinney.id.au  Tue Mar 27 23:41:23 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 28 Mar 2007 13:41:23 +1000
Subject: PyPy 1.0: JIT compilers for free and more
References: <mailman.5685.1175032114.32031.python-list@python.org>
Message-ID: <87abxym3vg.fsf@benfinney.id.au>

Carl Friedrich Bolz <cfbolz at gmx.de> writes:

> ==========================================
> PyPy 1.0: JIT compilers for free and more
> ==========================================
>
> Welcome to the PyPy 1.0 release - a milestone integrating the
> results of four years of research, engineering, management and
> sprinting efforts, concluding the 28 months phase of EU co-funding!

Fabulous! Congratulations to all who contributed to getting PyPy to
this significant milestone.

Here's to all the cool new things people will be doing with PyPy!

-- 
 \          "If nothing changes, everything will remain the same."  -- |
  `\                                                       Barne's Law |
_o__)                                                                  |
Ben Finney


From michele.simionato at gmail.com  Mon Mar 12 12:35:20 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Mar 2007 09:35:20 -0700
Subject: nonlinear interpolation
In-Reply-To: <7x7itm8m02.fsf@ruckus.brouhaha.com>
References: <1173713333.615789.287070@v33g2000cwv.googlegroups.com>
	<7x7itm8m02.fsf@ruckus.brouhaha.com>
Message-ID: <1173717319.977458.323280@q40g2000cwq.googlegroups.com>

On Mar 12, 5:28 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Michele Simionato" <michele.simion... at gmail.com> writes:
> > Any pointer would be well received :)
>
> Dunno about those libs but it helps to understand the mathematical
> options.  Numerical Recipes by Teukolsky et al has understandable,
> cookbook-like advice about this stuff.  I'm told that true numerics
> gurus scoff at it but it's at least a start.

No, I know about Numerical Recipes, I want an already-made solution.
For instance I found one here
http://dirac.cnrs-orleans.fr/ScientificPython/ScientificPythonManual/Scientific.Functions.LeastSquares-module.html
but I wonder if I should use numpy or something else, since
I am not following the progresses in numerical Python these days.

P.S. sorry for the multiple post, google tricked me.



From steve at holdenweb.com  Fri Mar 16 10:04:50 2007
From: steve at holdenweb.com (Steve Holden)
Date: Fri, 16 Mar 2007 10:04:50 -0400
Subject: String formatting with fixed width
In-Reply-To: <ete658$9g5$1@sea.gmane.org>
References: <ete5ec$juo$2@online.de> <ete658$9g5$1@sea.gmane.org>
Message-ID: <ete88o$gni$1@sea.gmane.org>

Steve Holden wrote:
> Alexander Eisenhuth wrote:
>> Hello alltogether,
>>
>> is it possible to format stings with fixed width of let's say 7 character. T 
>> need a floating point with 3 chars before dot, padded with ' ' and 3 chars after 
>> dot, padded with '0'.
>>
>> Followingh is my approach
>>  >>> f = 21.1
>>  >>> s = "%.03f" % f
>>  >>> s
>> '21.100'
>>
>> But there are missing ' '. How can I get that? (For bigger numbers than 999 they 
>> might be cut: 1021 -> 021)
>>
>   >>> def f(x):
>   ...   return "%7.3f" % (x % 1000.0)
>   ...
>   >>> for x in (9.9, 99.9, 999.9, 9999.9):
>   ...   print f(x)
>   ...
>    9.900
>   99.900
> 999.900
> 999.900
>   >>>
> 
... but (unfortunately?):

  >>> f(-9999.99)
'  0.010'
  >>>

You don't say what you want to do about negative numbers, so this may or 
may not be significant.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From spedrosa at gmail.com  Thu Mar  8 11:11:57 2007
From: spedrosa at gmail.com (Stephen Eilert)
Date: 8 Mar 2007 08:11:57 -0800
Subject: merits of Lisp vs Python
In-Reply-To: <8KPHh.5712$M65.2750@newssvr21.news.prodigy.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<LWHHh.1355$_a1.157@bignews7.bellsouth.net>
	<jaKHh.1974$uo3.161@newssvr14.news.prodigy.net>
	<7mOHh.3099$h73.2536@newsfe12.lga> <YwOHh.4278$B7.2519@bigfe9>
	<8KPHh.5712$M65.2750@newssvr21.news.prodigy.net>
Message-ID: <1173370317.438703.116790@v33g2000cwv.googlegroups.com>

On Mar 8, 5:23 am, John Nagle <n... at animats.com> wrote:
> Brian Adkins wrote:
> > Ken Tilton wrote:
>
> >> John Nagle wrote:
> > Turns out John is having quite a tough time with Python web hosting (the
> > thread has split off to a c.l.p only fork), so I'm going to cut him some
> > slack. Maybe with some lovin' we can woo him over to c.l.l ;)
>
>      Been there, done that.  I've actually used an original refrigerator
> sized Symbolics LISP machine.
>
>      I tend to think of Python as a LISP with infix syntax.
> We have a better handle on what to put in a dynamic language now, and
> Python does a good job in that direction.  I'm happy with the
> language; it's the integration with external components that isn't
> working.
>
>                                         John Nagle


OMG! And I thought the thread was dead!

Necromancers! Run!!!



From bjourne at gmail.com  Fri Mar  9 05:59:24 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Fri, 9 Mar 2007 11:59:24 +0100
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <1173436274.346506.200920@q40g2000cwq.googlegroups.com>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
Message-ID: <740c3aec0703090259k5253ac90r459269c5ea19e4e9@mail.gmail.com>

On 9 Mar 2007 02:31:14 -0800, dbhbarton at googlemail.com
<dbhbarton at googlemail.com> wrote:
> Thanks for the thoughts.
>
> > This could be implemented without new syntax: just make your editor
> > recognize some special comments, and apply the highlighting to the
> > following block. By example,
> >
> >                 # XXX Remove this when FuruFaifa is fixed to always provide
> >                 # XXX the names in the same order
> >                 names.sort()
> >                 names.reverse()
>
> Yes I recognise that we can use existing comments for this purpose,
> and if I was suitably gifted I guess I could try to make the IDE
> recognise these 'special comments', and maybe even work out what block
> they're meant to apply to. Of course I'll still argue that the WIP
> character would be a more elegant, speedy and versatile alternative.

But you are overloading the ? character for a purpose which it totally
was not meant for. What the character means really depends on what
person you are asking. To me, it means that what precedes it is
something someone or something does not know and wants to know the
answer to. To me, it really does not mean that what follows it is work
in progress.

Even if I could intuitively tell that a question mark represents a
work in progress, that information is not very useful. Similarly to
the "under construction" animated gifs that were popular on the web in
the mid 90-ties, the symbol does not convey any useful information.
WHY is it a work in progress? Is there something wrong with it?

?def foobar():
    do stuff

The question mark does not leave me any the wiser. Now if you replace
that question mark with a comment:

# foobar() is buggy because it throws weird exceptions when x = 42.
def foobar():
    do stuff

That gives me some useful information.

-- 
mvh Bj?rn


From vorner at ucw.cz  Mon Mar 26 05:24:34 2007
From: vorner at ucw.cz (Michal 'vorner' Vaner)
Date: Mon, 26 Mar 2007 11:24:34 +0200
Subject: Sending ECHO_REQUEST (pinging) with python
In-Reply-To: <pan.2007.03.26.06.30.33@gmail.com>
References: <pan.2007.03.26.06.30.33@gmail.com>
Message-ID: <20070326092434.GA24995@tarantula.kolej.mff.cuni.cz>

On Mon, Mar 26, 2007 at 08:30:16AM +0200, Thomas Dybdahl Ahle wrote:
> Hi, I've writing a python application in which I'd like to have a small 
> "ping label", to always tell the current ping time to the server.
> 
> It seems however that I have to be root to send those imcp packages, but 
> I guess there must be a workaround since I can easily use the "ping" 
> command as ordinary user.
> 
> Do anybody know how to do this in python?

You need root for that and the ping command is allowed to have them by
suid bit. You can execute ping from inside python and use ping as is, if
you need.

-- 
This is a terroristic email. It will explode in 10 minutes, 
if you do not close it in the meantime.

Michal "vorner" Vaner
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From newsgroups at nospam.nowire.org  Sat Mar 31 08:53:11 2007
From: newsgroups at nospam.nowire.org (=?UTF-8?B?VGhvbWFzIEtyw7xnZXI=?=)
Date: Sat, 31 Mar 2007 14:53:11 +0200
Subject: Sorting a multidimensional array by multiple keys
In-Reply-To: <pan.2007.03.31.12.43.14@no.spam.plz>
References: <pan.2007.03.31.12.43.14@no.spam.plz>
Message-ID: <eulljn$4am$1@ariadne.rz.tu-clausthal.de>

Rehceb Rotkiv schrieb:
> can I sort a multidimensional array in Python by multiple sort keys? A 
> litte code sample would be nice!

You can pass a function as argument to the sort method of a list.
The function should take two arguments and return -1, 0 or 1 as
comparison result. Just like the cmp function.

This will objects in list obj_lst by their id attributes:

def sorter(a, b):
    return cmp(a.id, b.id)

obj_lst.sort(sorter)

Thomas


From ogerchikov at gmail.com  Sat Mar 24 00:45:38 2007
From: ogerchikov at gmail.com (ogerchikov at gmail.com)
Date: 23 Mar 2007 21:45:38 -0700
Subject: How can I tell when the threads that I spawn are done in python
Message-ID: <1174711538.875033.215320@d57g2000hsg.googlegroups.com>


Hi,

In my python scripts, I create thread likes this:
   // for example threadCount is 10
     for j in range(int(threadCount)):
                t = MyThread()
                t.start()

     // wait all the threads are done
    doSomething()

My question is how can i tell when all the threads are done before I
call doSomething()?

Thank you.



From robert.kern at gmail.com  Thu Mar 22 15:37:06 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 22 Mar 2007 14:37:06 -0500
Subject: design question: generator object with other attributes
In-Reply-To: <aLAMh.8608$EA.2582@trnddc07>
References: <aLAMh.8608$EA.2582@trnddc07>
Message-ID: <etult8$7da$1@sea.gmane.org>

Alan Isaac wrote:
> Essentially I want a generator that I can query about
> its characteristics.  (E.g., a random number generator
> that I want to be able to ask about is distributional
> parameters.)
> 
> I am thinking of a class that wraps a generator.
> An object of this class will have a ``next`` method that simply
> returns the value the object get by calling the wrapped
> generator.

You will probably also need to define

  def __iter__(self):
    return self

if I remember correctly.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From gtcopeland at gmail.com  Wed Mar  7 09:39:05 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 7 Mar 2007 06:39:05 -0800
Subject: Why does SocketServer default allow_reuse_address = false?
In-Reply-To: <45e3668e$0$16385$88260bb3@free.teranews.com>
References: <45e3668e$0$16385$88260bb3@free.teranews.com>
Message-ID: <1173278345.027948.94700@j27g2000cwj.googlegroups.com>

On Feb 26, 5:54 pm, "Joshua J. Kugler" <jos... at eeinternet.com> wrote:
> Considering that UNIX Network Programming, Vol 1 (by W. Richard Stevens)
> recommends "_All_ TCP servers should specify [SO_REUSEADDR] to allow the
> server to be restarted [if there are clients connected]," and that
> self.allow_reuse_address = False makes restarting a server a pain if there
> were connected clients, why does SocketServer default allow_reuse_address
> to False?  It's kind of bemusing to subclass ThreadingTCPServer just to
> change one variable that arguably should have been True in the first place.
>
> Is there some history to this of which I'm not aware?  Is there a good
> reason for it to default to false?
>

Yes, it is there for a good reason.  Security is the primary focus of
that option.  If you enable that option, rogue applications can assume
service processing under a number of server failure conditions.  In
other words, start your rogue, crash the primary service, and you now
have a rogue service running.  Even periodic checks will show the
server is still running.  Under a number of other configurations, it
is also possible for the rogue service to simply start and usurp some
types of IP traffic on certain OSs which would otherwise be delivered
to your real server.

Contrary to the book, blindly enabling SO_REUSEADDR is a very, very
bad idea unless you completely understand the problem domain.  I'm
sure Stevens' does understand so it makes for a good choice for him.
On the other hand, most people don't understand the implications so it
makes for a very, very poor move from a security perspective.

Long story short, it is not a bug.  It is a feature.  The proper
default is that of the OS, which is to ensure SO_REUSEADDR is disabled
unless you absoluetely understand what you're buying by enabling it.


Greg



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar  8 03:05:42 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 09:05:42 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <1173319364.288542.252370@j27g2000cwj.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
	<45ef3b80$0$18249$426a34cc@news.free.fr>
	<1173319364.288542.252370@j27g2000cwj.googlegroups.com>
Message-ID: <45efc3b4$0$6082$426a74cc@news.free.fr>

MonkeeSage a ?crit :
> On Mar 7, 4:58 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>>    except_retry: # the missing(???) keyword you're after
> 
> What is 'except_retry'?

A totally imaginary statement that would do what the OP is looking for.

> To the OP, with the loop and the callables you could also break out of
> the loop when the condition is met and use the else condition to raise
> the exception.
> 
> def test(arg):
>     for f in int, float, str, hex:
>         try:
>             return f(arg)
>             break # breaks on f==str

You don't need to break here since you're returning.

>         except:
>             pass
>     else:
>         raise ValueError # remove str above to see this


From anil.karadag at gmail.com  Fri Mar 16 16:13:34 2007
From: anil.karadag at gmail.com (=?ISO-8859-9?Q?ANIL_KARADA=D0?=)
Date: Fri, 16 Mar 2007 22:13:34 +0200
Subject: python global variable error
Message-ID: <f89a5eb80703161313l72bd2eb8m364d6736e6bae79b@mail.gmail.com>

hi, i made a program in python but received global name  error. the program
code;
  serverhost = '127.0.0.1'
    serverport = 2000
    BUFSIZ = 1024
    addr = (serverhost,serverport)
    if str(sys.argv).find("-s") == -1:
    cs = socket(AF_INET, SOCK_STREAM,0)             # create a TCP socket
    cs.connect(addr)
    key=1
    main()
    else:
        serversock = socket(AF_INET, SOCK_STREAM)    # create a TCP socket
        serversock.bind(addr)
        serversock.listen(2)
    key=2
    print 'waiting for connection?'
    while 1:
            clientsock, addr = serversock.accept()
        print '?connected from:', addr,clientsock
        main()
    serversock.close()

what is difference cs and clientsock? i use cs in main() function or others,
but  don't use clientsock not call from main() "  data = clientsock.recv(BUFSIZ)
NameError: global name 'clientsock' is not defined "

i am sorry, i  little know english
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From jezonthenet at yahoo.com  Tue Mar 13 02:13:37 2007
From: jezonthenet at yahoo.com (jezzzz .)
Date: Mon, 12 Mar 2007 23:13:37 -0700 (PDT)
Subject: Starting Python... some questions
Message-ID: <845401.48808.qm@web58115.mail.re3.yahoo.com>

Jordan, Thinker, Steven,





Thanks for your responses. Makes more sense now! I can run my program from the console.



I added the self parameter to the the chassis_id function, however I now have a problem and question regarding encoding MAC addresses for a struct. What string format am I supposed to use?



Also, I think I will get rid of Scapy in my small program. Any references I can use to easily send (no need to receive) a packet with a Layer 1 and 2 only? (i.e. only Ethernet and LLDP - no need for IP, UDP, TCP etc. I wish to create something like Ethernet | LLDP msg1 | LLDP msg2 | ... | LLDP msgn)

Thanks!


This is what I got now:



#!/usr/bin/python

import scapy

import struct



class lldp_class:

    def __init__(self):

        self.chassis_id_tlv = None

    

    def chassis_id(self, subtype, chassis_info):

        if subtype == 4:

            chassis_data = struct.pack("!B",chassis_info)

        subtype_data = struct.pack("!B",subtype)

        self.chassis_id_tlv = subtype_data + chassis_data



def __main__():

    p = lldp_class()

    p.chassis_id(4, "01:80:C2:00:00:0E")

    payload = p.chassis_id_tlv

    ether = scapy.Ether(dst="01:02:03:04:05:06")

    fullpayload = ether + payload

    sendp(fullpayload)



__main__()









 
____________________________________________________________________________________
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From paddy3118 at googlemail.com  Fri Mar 30 01:53:57 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 29 Mar 2007 22:53:57 -0700
Subject: Modal value of an array
In-Reply-To: <1hvr34h.12c953hpq7pavN%aleax@mac.com>
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
	<1hvpovd.1anin2by4gjl1N%aleax@mac.com>
	<1175208296.769865.186480@r56g2000hsd.googlegroups.com>
	<1hvr34h.12c953hpq7pavN%aleax@mac.com>
Message-ID: <1175234036.941266.112960@e65g2000hsc.googlegroups.com>

On Mar 30, 2:58 am, a... at mac.com (Alex Martelli) wrote:
> Paddy <paddy3... at googlemail.com> wrote:
>
>    ...
>
>
>
> > > A bit more directly:
>
> > > >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> > > >>> max(foo, key=foo.count)
>
> > > 'spam'
>
> > > Alex
>
> > This doesn't call foo.count for duplicate entries by keeping a cache
>
> > >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
> > >>> def cachecount(x, cache={}):
> > ...   return cache.setdefault(x, foo.count(x))
> > ...
> > >>> max(foo, key=cachecount)
> > 'spam'
> > >>> cachecount.func_defaults
> > ({'eggs': 2, 'beans': 1, 'spam': 4},)
>
> If you're willing to do that much extra coding to save some work (while
> still being O(N squared)), then the further small extra needed to be
> O(N) starts looking good:
>
> counts = collections.defaultdict(int)
> for item in foo: counts[item] += 1
> max(foo, key=counts.get)
>
> Alex

Yeh, My first answer is like that but I had to play around with your
original to try and 'fix' the idea in my head - it might be useful
someday.
:-)

- Paddy.



From PrikrylP at skil.cz  Fri Mar 16 02:45:53 2007
From: PrikrylP at skil.cz (Petr Prikryl)
Date: Fri, 16 Mar 2007 07:45:53 +0100
Subject: problem with str()
Message-ID: <E8AE1CAFC84D634A9CCC887B8AAB15EC1F24F8@skil01.skil.mistni>



"Alex Martelli" wrote
> Steve Holden wrote:
>    ...
> > >> Get yourself a stuffed bear, and next time you have this kind of
problem
> > >> spend a few minutes explaining to the bear exactly how your
program
> > >> can't possibly be wrong. Works like a charm.
> > > 
> > > A rubber ducky works much better for that, btw -- more easily
washable
> > > than a stuffed bear, for example.
> > > 
> > But stuffed bears are so much more knowledgeable about the minutiae
of
> > software design.
> 
> And yet, the key to Python's strength is duck typing -- if you can
teach
> the duck to type, you've got it made.

... and then (gradually) rather unrealistic communication dream 
called "Babylonian fish" can be replaced by slighly more realistic 
programmers dream called "Python language with natural language 
processing when programming" (buzzword DuckPython).


From mark at mailinator.com  Sat Mar 24 01:07:42 2007
From: mark at mailinator.com (Mark)
Date: 24 Mar 2007 05:07:42 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1hvf41r.136f636r1ft4cN%aleax@mac.com>
Message-ID: <pan.2007.03.24.05.07.41@mailinator.com>

On Fri, 23 Mar 2007 07:47:04 -0700, Alex Martelli wrote:
> You can use
> 
> python -c 'import myscript; myscript.main()'
> 
> and variations thereon.

Hmmm, after all that, this seems to be close to what I was looking for.

Thanks Alex. Didn't find anything about this in your cookbook! (I'm just
starting reading it whole - best way to really learn the language I
think).

So the general purpose invoking bash script e.g. "runpy" is merely something 
like:

#################################################################
#!/bin/bash

if [ $# -lt 1 ]; then
    echo "usage: `basename $0` script.py [script args ..]"
    exit 1
fi

PROG=$1
DIR=`dirname $PROG`
MOD=`basename $PROG`
MOD=${MOD%.py}
shift
exec python -c "import sys; \
                sys.argv[0] = \"$PROG\"; \
                sys.path.append(\"$DIR\"); \
                import $MOD; $MOD.main()" $@
#################################################################

So I timed "~/bin/myscript.py myargs" against "runpy ~/bin/myscript.py
myargs" but got only maybe a couple of millisec improvement (using a
1000 line myscript.py which just immediately exits - to try and push the
advantage!).

So I agree - the ends do not justify the means here and I'll just
execute myscript.py directly. Still not sure why python does not provide
this as a "python --compile_and_run myscript.py" option though?! ;)


From lbrooks at MIT.EDU  Thu Mar 15 23:34:35 2007
From: lbrooks at MIT.EDU (Lane Brooks)
Date: Thu, 15 Mar 2007 23:34:35 -0400
Subject: Import Error with embedded python
Message-ID: <45FA104B.3050400@mit.edu>

When I run a particular python script from an embedded interpreter, I 
get the following ImportError:

   File "di.py", line 14, in load
     from xml.dom.ext.reader import Sax2
   File 
"/usr/lib64/python2.4/site-packages/_xmlplus/dom/ext/reader/__init__.py", 
line 14, in ?
     import string, urllib2, urlparse, cStringIO, os
   File "/usr/lib64/python2.4/urllib2.py", line 90, in ?
     import base64
   File "/usr/lib64/python2.4/base64.py", line 9, in ?
     import struct
ImportError: /usr/lib64/python2.4/lib-dynload/structmodule.so: undefined 
symbol: PyExc_TypeError


However, running the same script from the command line does not produce 
this error.  Any ideas as to what I need to do to get the embedded 
interpreter setup to not produce this error?

The platform is Linux x86_64.

Thanks,
Lane


From jackdied at jackdied.com  Wed Mar  7 20:42:45 2007
From: jackdied at jackdied.com (Jack Diederich)
Date: Wed, 7 Mar 2007 20:42:45 -0500
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173210288.178790.233730@64g2000cwx.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
	<1173105492.632821.326810@n33g2000cwc.googlegroups.com>
	<1173121140.087027.214600@h3g2000cwc.googlegroups.com>
	<1173210288.178790.233730@64g2000cwx.googlegroups.com>
Message-ID: <20070308014245.GG18179@performancedrivers.com>

On Tue, Mar 06, 2007 at 11:44:48AM -0800, Arnaud Delobelle wrote:
> On 5 Mar, 18:59, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
> [snip]
> > Well in fact I couldn't help but try to improve it a bit. Objects now
> > don't need a callerclass attribute, instead all necessary info is
> > stored in a global __callerclass__. Bits that didn't work now do.
> 
> OK that wasn't really thought through. Because I changed the design
> mid-way through writing it __callerclass__ wasn't doing the right
> thing. I've sorted the issues I could see and made it (hopefully)
> thread-safe. I'm not going to pollute this list again with my code so
> I've put it at the following address:
> 
> http://marooned.org.uk/local.py
> 

I fooled around with this a bit and even when using different techniques
than Arnaud (namely stack inspection and/or class decorators) it ends up
looking the same.  In order to pull this off you need to

1) mark the localmethods as special
   (@localmethod works here)
2) mark all non-localmethods as not special
   (metaclasses, class decorators, or module-level stack inspection)
3) keep track of the call stack
   (can be implemented as part of #1 and #2 but adds overhead regardless)

Double underscore names take care of #1 at compile time and by definition
anything not name-manged falls into the non-special class of #2.  After
that the special/non-special calls are given different names so the
native call semantics take care of the call stack for you.

With some bytecode manipulation it should be possible to fake the same 
name mangling by using just @localmethod decorators and adding some 
overhead to always checking the current class (eg A.m() for the function
am()) and falling back on doing the normal call of self.m().  This could 
be made more exact by doing inspection after the fact with any of 
metaclasses/class decorators/module inspection because then we could 
inspect what is a @localmethod and what isn't all the way through the class
tree.

I could be wrong on the byte-hack part as I've only recently learned
to read the chicken bones that are byte codes (thanks to PyCon sprints
I got to spend time picking python-devs's brains over burritos).  It
seem plausible if fragile.

-Jack


From Ognjen at mailshack.com  Sat Mar 10 09:27:04 2007
From: Ognjen at mailshack.com (Ognjen Bezanov)
Date: Sat, 10 Mar 2007 14:27:04 +0000
Subject: Help controlling CDROM from python
Message-ID: <45F2C038.40601@mailshack.com>

Hello,

I am trying to control a CD-ROM drive using python. The code I use is
shown below.

> import CDROM
> from fcntl import ioctl
> import os
> 
> 
> class Device:
> 
> 	CDdevice=""
> 	CDfd = None
> 	
> 	def __init__(self,name):
> 		self.CDdevice = name	#we get a device name when module loaded
> 		
> 		if self.CDdevice == "":
> 			print "No device specified"
> 			sys.exit(-1)
> 		self.openCD()	
> 		
> 	def openCD(self):
> 			
> 		try:
> 			self.CDfd = open(self.CDdevice, 'r') #open the device and return filedescriptor 
> 		
> 		except(OSError,IOError): #if there is an OS or IO Error (usually indicates nodisk)
> 			print "Device Error, Halting.... (usually means drive or disk not found)"  
> 			sys.exit(-1)

>	def unlockCD(self):
> 		return self.sendCDcommand(CDROM.CDROM_LOCKDOOR,0)

> 	def ejectCD(self):
> 		self.unlockCD() #we need to unlock the CD tray before we try to eject, otherwise we get an IO Error (#5)
> 		return self.sendCDcommand(CDROM.CDROMEJECT)
> 	


> 	def sendCDcommand(self,command,argument=''):
> 	    return ioctl(self.CDfd,command,argument)
> 	    	



The code that calls the class is a follows:

> import CD_Bindings
> 
> CD = CD_Bindings.Device("/dev/cdrom")
> 
> print CD.ejectCD()

This works great, but only when there is a disk inside, otherwise we get
an error.

My issue is that I need to be able to eject the CDROM tray even if there
is no disk inside.

This is possible because other programs (like the linux "eject" command)
can do it. Its just a question of how it is done in python. So I'm
posting here in the hope someone can tell me.

Thanks,

Ognjen




From cedb816 at yahoo.com  Tue Mar  6 00:08:03 2007
From: cedb816 at yahoo.com (ce)
Date: 5 Mar 2007 21:08:03 -0800
Subject: Islam, the Religion of Ease
In-Reply-To: <1173155233.348048.220690@n33g2000cwc.googlegroups.com>
References: <1173155233.348048.220690@n33g2000cwc.googlegroups.com>
Message-ID: <1173157683.610018.305860@n33g2000cwc.googlegroups.com>

On Mar 6, 12:27 pm, lovelyd... at hotmail.com wrote:
> Excuse me!!
> Would you stop for a moment?!
> O...man...Haven't you thought-one day- about yourself ?
> Who has made it?
> Have you seen a design which hasn't a designer ?!
> Have you seen a wonderful,delicate work without a worker ?!
> It's you and the whole universe!..
> Who has made them all ?!!
> You know who ?.. It's "ALLAH",prise be to him.
> Just think for a moment.
> How are you going to be after death ?!
> Can you believe that this exact system of the universe and all of
> these great creation will end in in nothing...just after death!
> Have you thought, for a second, How to save your soul from Allah's
> punishment?!
> Haven't you thought about what is the right religion?!
> Read ... and think deeply before you answer..
> It is religion of Islam.
> It is the religion that Mohammad-peace upon him- the last prophet, had
> been sent by.
> It is the religion that the right Bible- which is not distorted-has
> preached.
> Just have a look at The Bible of (Bernaba).
> Don't be emstional.
> Be rational and judge..
> Just look..listen...compare..and then judge and say your word.
> We advise you visiting :http://www.islam-guide.comhttp://www.thetruereligion.orghttp://www.beconvinced.comhttp://www.plaintruth.orghttp://english.islamway.comhttp://www.todayislam.comhttp://www.prophetmuhammed.orghttp://www.islamtoday.net/english/http://www.islamunveiled.orghttp://www.islamic-knowledge.com

Yah, this has so much to do with python..

python is the language of ease too!

I am muslim too by the way, but i dont' think this is a proper way to
let ppl know about our religion, buddy!

have any other opinion!



From ms at cerenity.org  Thu Mar 22 13:12:34 2007
From: ms at cerenity.org (Michael)
Date: Thu, 22 Mar 2007 17:12:34 +0000
Subject: Kamaelia & Google's Summer of Code 2007
Message-ID: <4602b76c$0$8731$ed2619ec@ptn-nntp-reader02.plus.net>

Hi,


We're (BBC Research) participating in Google's Summer of Code as a mentor
organisation again, and I thought it worth spreading some extra publicity
where I think there might be some interested people. (I perhaps should've
sent this sooner!) 

* What's Google Summer of Code? (I suspect most people here know :)

Essentially Google are paying students to work on open source projects and
being mentored in those projects, producing useful code and learning useful
skills. Google's aim is to increase the number of people bitten by the
open source bug :-)

* How is BBC Research/ Kamaelia involved?

Like last year we're a mentor organisation, Kamaelia is the open source
project that project applications are invited for. It's aim is to make
highly concurrent systems natural to create and simple to maintain. (given
a choice of forces the we choose the latter) We seem to be having some
success in this and have a number of systems we've built using Kamaelia. 

Kamaelia is primarily focussed around building networked, multimedia
systems, tools and applications, since that's generally our problem domain,
however Kamaelia is a generic component framework & toolset.

Our project ideas and guidance page is here:
   * http://kamaelia.sourceforge.net/SummerOfCode2007

However, we're also interested other ideas beyond that, especially systems
that use Kamaelia that can act as exemplars. To give an idea of potential
scope, a list of components can be found here:
   * http://kamaelia.sourceforge.net/Components

* Who can Apply ?

You need to be a student now, or in september enrolled at a university
degree course or similar level of institution/degree.

* When is the deadline ?

Monday midnight.

* Url?

http://code.google.com/soc/

Please feel free to forward this to any students or student groups you would
find this interesting ! :-)

Regards,


Michael.
--
Michael Sparks, Senior Research Engineer, BBC Research, Technology Group
michael.sparks at rd.bbc.co.uk, Kamaelia Project Lead, http://kamaelia.sf.net/




From arnodel at googlemail.com  Tue Mar 13 16:19:53 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 13 Mar 2007 13:19:53 -0700
Subject: Iterating across a filtered list
In-Reply-To: <7xird5ndey.fsf@ruckus.brouhaha.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<1173813714.767225.164790@q40g2000cwq.googlegroups.com>
	<7xird5ndey.fsf@ruckus.brouhaha.com>
Message-ID: <1173817193.179354.235790@p15g2000hsd.googlegroups.com>

On Mar 13, 7:36 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Arnaud Delobelle" <arno... at googlemail.com> writes:
> > in the for loop.  Moreover you recalculate the regexp for each element
> > of the list.
>
> The re library caches the compiled regexp, I think.

That would surprise me.
How can re.search know that string.lower(search) is the same each
time?  Or else there is something that I misunderstand.

Moreover:

In [49]: from timeit import Timer
In [50]: Timer('for i in range(1000): search("abcdefghijk")', 'import
re; search=re.compile("ijk").search').timeit(100)
Out[50]: 0.36964607238769531

In [51]: Timer('for i in range(1000): re.search("ijk",
"abcdefghijk")', 'import re;
search=re.compile("ijk").search').timeit(100)
Out[51]: 1.4777300357818604

--
Arnaud



From john106henry at hotmail.com  Fri Mar  9 16:58:09 2007
From: john106henry at hotmail.com (John Henry)
Date: 9 Mar 2007 13:58:09 -0800
Subject: floating point rounding
In-Reply-To: <uHjIh.21006$oJ1.746@newsfe18.lga>
References: <DOiIh.135$TK5.124@newsfe13.lga><uHjIh.21006$oJ1.746@newsfe18.lga>
Message-ID: <1173477489.186292.167530@c51g2000cwc.googlegroups.com>

On Mar 9, 5:45 am, hg <h... at nospam.org> wrote:
> hg wrote:
> > Hi,
>
> > Here is my issue:
>
> > f = 1.5 * 0.01
> > f
> >>> 0.014999999999999999
> > '%f' % f
> >>>'0.015000'
>
> > But I really want to get 0.02 as a result ... is there a way out ?
>
> > Thanks,
>
> > hg
>
> round


Or more precisely:

round(0.014999999999999999,2)

if that's what you wish to do.



From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 08:37:24 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 23:37:24 +1100
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
Message-ID: <pan.2007.03.20.12.37.24.575867@REMOVE.THIS.cybersource.com.au>

On Tue, 20 Mar 2007 10:28:10 +0100, Bruno Desthuilliers complained about
classic classes:

>> What's wrong with old-style classes?
> 
> Almost everything. 

That's rather an exaggeration, don't you think? They have methods, and
inheritance, and attributes, all the critical features of classes, and
work perfectly well even if they don't support the more advanced features.


>> - Documentation on old style classes is more extensive.
> 
> Since new-style classes are backward compatible with old-style ones, 

Then "almost everything" is wrong with new style classes too? *wink*


> almost all the old-style classes documentation applies to new-style ones 
> as well. Everything else is quite well documented too:
> http://www.python.org/doc/newstyle/

On that very page, the first sentence says:

"Unfortunately, new-style classes have not yet been integrated into
Python's standard documention."

complete with spelling mistake.


>> On the minus side:
>> 
>> - Properties don't work as you expect them too.
> 
> properties don't work. Period. Properties rely on the descriptor 
> protocol, which only works with new-style classes.

Non-data descriptors (e.g. properties with only a getter) work fine. It is
only data descriptors (those with both a getter and a setter) that don't
work correctly.


>   - no metaclasses

Metaclasses worked all the way back in Python 1.5, although they were
painful and brain-exploding.

http://www.python.org/doc/essays/metaclasses


>   - no classmethod

Guido's own documentation for classmethods and staticmethods uses classic
classes. See

http://www.python.org/download/releases/2.2.3/descrintro/#staticmethods

But don't just take his word for it, try it for yourself *wink*



-- 
Steven



From dbhbarton at googlemail.com  Fri Mar  9 04:14:46 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 01:14:46 -0800
Subject: 2 new comment-like characters in Python to aid development?
Message-ID: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>

Had a thought that's grown on me. No idea if it's original or not- too
inexperienced in programming- but I guess there's no harm floating it
out there.

Python wins big on readability, and there's no doubt that context-
dependent text formatting in IDEs (keywords, strings, comments etc) is
a massive help too, therefore benefitting development and maintenance.
This idea is in a similar vein, especially for when scripts grow
large.

What if 2 new 'special' comment-like characters were added to Python?:


1. The WIP (Work In Progress) comment:

A '?' placed in the preceding whitespace of a line as a means of
quickly highlighting a line or block of code for special attention.
The interpreter simply ignores these characters, and executes the code
as if each WIP character wasn't there. The value-added comes from how
IDEs can exploit this to color the line or code block (in a
customisable fashion as with other context-dependent IDE formatting).

Thus...
?a=6 #This line gets highlighted.
?class MyClass: #This entire class gets highlighted.
    def __init__(self):
        self.val=3
?def MyFn(): #This entire function gets highlighted.
    return 'x'
?for each in range(9): #This entire block gets highlighted.
    print each

Simply delete the ? and the associated highlighting vanishes
immediately.
Indeed if the interpreter can tolerate one '?' then perhaps it can
also allow '??' and '???', letting the IDE color each differently for
some additional flexibility.

Applications...
Lets you highlight / un-highlight entire blocks with a single
keystroke: to record which part of a long script you're working on, or
which part needs development or optimization. IDEs could add
additional functionality if they chose: options to remove all wip
comments, or step through them, or even to automatically add WIP
comments (to highlight syntax errors, potentially infinite loops, or
rate-limiting code blocks, perhaps?)


2. The HALT comment:

A '!' at the start of a line, indicating the end of the script proper.
The interpreter would register this one, and ignore everything after
it, a bit like a sys.exit() call but also stopping it from picking
syntax errors after the HALT. IDEs could then 'grey out' (or 'yellow
out' or whatever) all following characters, including later HALT
comments.

Applications...
Lets you mask / unmask the tailing parts of a py script with a single
keystroke: potentially quite useful during the writing / testing phase
of coding when you might not want to run the whole thing, or as
another means of adding extensive comments to the end of a file. Could
also be rather handy in 'tutorial scripts' and the like...

E.g...
# Welcome to my Python Tutorial Script
my_string="Hello World"
print my_string
! # Everything after this '!' is ignored and greyed out for now, but
when you're ready to move on to the next part of the tutorial script
just delete the '!' and run it again.
my_list=list(my_string)
print my_list
! # <-- delete '!' when ready, etc etc
my_list_reversed=my_list[::-1]
print my_list_reversed


As far as I can see, neither of these would break backwards
compatibility and, like the @ decorator, if you don't like it, you
wouldn't have to use it. I don't know enough about the guts of Python
to say much about ease of implementation, but it doesn't seem like it
would be too hard.

Personally I'd use these a lot, but I'm a rank amateur so maybe I just
don't develop code properly.
That's it. Useful? Pointless? Dangerous? Stupid?


Dave.



From gagsl-py2 at yahoo.com.ar  Fri Mar 23 04:00:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 05:00:29 -0300
Subject: Question regarding __new__
References: <20070322171952.121530d7@localhost>
Message-ID: <op.tpmtu3ljx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 22 Mar 2007 13:19:52 -0300, Frank Benkstein  
<frank-python at benkstein.net> escribi?:

> Yet [1] says: "[...] some rules for __new__: [...] If you return an
> object of a different class, its __init__ method will be called."

That was true at that time (2.2 initial), but not now. See  
http://www.python.org/sf/537450
Revision 26220 - Modified Sat Apr 6 01:05:01 2002 UTC (4 years, 11 months  
ago) by gvanrossum
- Changed new-style class instantiation so that when C's __new__
   method returns something that's not a C instance, its __init__ is
   not called.  [SF bug #537450]

The documentation should be updated to reflect this change.

> Am I missing something? Is this documented somewhere else?

See http://docs.python.org/ref/customization.html

> Also it
> would be nice if someone could point me to the function that implements
> this in C. I didn't find anything in object.c or typeobject.c.

It's in typeobject.c, function type_call

-- 
Gabriel Genellina



From bbbart at inGen.be  Sun Mar  4 04:14:22 2007
From: bbbart at inGen.be (Bart Van Loon)
Date: Sun, 4 Mar 2007 14:14:22 +0500
Subject: portable Python ifconfig
References: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
	<slrneul360.a94.bbbart@charles.inGen.islamabad>
Message-ID: <slrneul3fe.abo.bbbart@charles.inGen.islamabad>

It was Sun, 4 Mar 2007 14:09:20 +0500, when Bart Van Loon wrote:
> It was Sun, 4 Mar 2007 02:38:58 +0500, when Bart Van Loon wrote:
>> Hi all,
>>
>> I'm looking for a portable (FreeBSD and Linux) way of getting typical
>> ifconfig information into Python.
>
> After lots of trial and error (I'm proficient in C at all), I puzzled

err... I'm NOT proficient in c at all :-)

-- 
groetjes,
BBBart

   Hobbes : How is the diorama coming along?  
   Calvin : I'm almost finished.
   Hobbes : I don't see the roadrunner. Weren't you going to put one in?  
   Calvin : See the cotton balls I glued down?  
   Hobbes : Yeah?  
   Calvin : The roadrunner just ran out of the scene leaving behind clouds 
            of dust!


From mail at microcorp.co.za  Thu Mar  1 00:54:24 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 1 Mar 2007 07:54:24 +0200
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
Message-ID: <022201c75bca$1f390360$03000080@hendrik>

<bayer.justin at googlemail.com> wrote:


> Is it possible to read to and write to the std streams of a
> subprocess? What am I doing wrong?

I think this problem lies deeper - there has been a lot of
complaints about blocking and data getting stuck in pipes
and sockets...

I have noticed that the Python file objects seem to be 
inherently half duplex, but I am not sure if it is python
or the underlying OS. (Suse 10 in my case)

You can fix it by unblocking using the fcntl module, 
but then all your accesses have to be in try - except
clauses.

It may be worth making some sort of FAQ on this
subject, as it appears from time to time.

The standard advice has been to use file.flush()
after file.write(), but if you are threading and 
have called file.read(n), then the flushing does 
not help - this is why I say that the file object
seems to be inherently half duplex.

It makes perfect sense, of course, if the file is a
real disk file, as you have to finish the read before
you can move the heads to do the write- but for 
pipes, sockets and RS-232 serial lines it does not
make so much sense.

Does anybody know where it comes from - 
Python, the various OSses, or C?

- Hendrik



From bbxx789_05ss at yahoo.com  Sun Mar 25 16:22:36 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 25 Mar 2007 13:22:36 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174813227.275145.211000@o5g2000hsb.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
Message-ID: <1174854156.298431.68150@n59g2000hsh.googlegroups.com>

On Mar 25, 3:00 am, irs... at gmail.com wrote:
> On Mar 25, 9:13 am, "7stud" <bbxx789_0... at yahoo.com> wrote:
>
> > MyClass.someFunc
>
> > Is there some other way to retrieve a user-defined function object
> > from a class other than using the class name or an instance?
>
> What Steven B. already said, MyClass.__dict__['someFunc'], is a
> different way than MyClass.someFunc that produces different results.

That doesn't seem to fit what GvR was talking about.  From this
example:

class Test(object):
        def greet():
                print "Hello"

methObj = Test.__dict__["greet"]
print methObj.im_self

I get this output:

Traceback (most recent call last):
  File "test1.py", line 7, in ?
    print methObj.im_self
AttributeError: 'function' object has no attribute 'im_self'

So it doesn't look like a method object gets created when you retrieve
a function from a class like that.  Compare to:

class Test(object):
        def greet():
                print "Hello"

methObj = Test.greet
print methObj.im_self

output:
None

> Since the method is an attribute of a class, what other kinds of means
> are you expecting to be possible?
>

I'm just wondering why in this description:
----
When a user-defined method object is created by retrieving a user-
defined function object from a class, its im_self attribute is None
and the method object is said to be unbound. When one is created by
retrieving a user-defined function object from a class via one of its
instances, its im_self attribute is the instance, and the method
object is said to be bound.
-----
GvR didn't explicitly mention using the class name to retrieve the
function object in the first sentence.  It seems to imply there are
other ways to retrieve the function object from the class that cause a
method object to be created.



From john106henry at hotmail.com  Mon Mar 19 14:30:32 2007
From: john106henry at hotmail.com (John Henry)
Date: 19 Mar 2007 11:30:32 -0700
Subject: PythonCard thoughts
In-Reply-To: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
Message-ID: <1174329032.236378.161150@e65g2000hsc.googlegroups.com>

On Mar 19, 5:08 am, "king kikapu" <aboudou... at panafonet.gr> wrote:
> Hi to all folks here,
>
> i downloaded and "playing" with PythonCard and i just want to share my
> thoughts so maybe we can discuss a little about it.
> I was used to wxGlade before and i think PythonCard is even better.
> I like the separate implementation of GUI and Code that PythonCard
> provides, i also like the "binding system" so you can bind functions
> to events and have them executed at runtime.
> I also like that it does not force you to use sizers and all that
> stuff and that you can freely place your components on the form and
> set their exact position just with the mouse.
>
> The only "problem" i see with this design is that by that separation
> of Gui/Code, you loose the intellisense that (ex. PyDev) some editors/
> plugins can provide because in the .py file nothing is indicating
> that , for example, the btnDoWork is a Button object.
> This force you to remember many properties and switch back and forth
> between your code and the wxPython help file. This is not the case for
> wxGlade because all boilerplate code is in the same file (for good and
> for bad) and PyDev (and others too) can "understand" for which kind of
> objects we are talking about and so can display -and thus help us-
> with their properties.
>
> Apart from that, everything else is great.
>
> Any opinions/suggestion on all this ?


(If I understand your question correctly)

There is no restirction on what you call your objects.  For instance,
I do call all of my buttons btnSomeThing, and so forth.  If you use
the codeEditor that comes with Pythoncard, you can easily see which
method goes with what control.

(And yes, I wish there are more developers drawn to Pythoncard too -
it's such a nice package).



From facundo at taniquetil.com.ar  Wed Mar 14 08:54:38 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 14 Mar 2007 12:54:38 +0000 (UTC)
Subject: i can`t get python working on the command line (linux)
References: <6e24a8e80703130804y7a88f1b0wf7ed30e98d6a35f7@mail.gmail.com>
Message-ID: <et8rad$hrt$1@sea.gmane.org>

Mark wrote:


> and i`ve put it in tel.py (just the same as in the sample) than chmod
> it to 777 (just to make sure it isn`t a permission issue) and than i
> run it with: ./tel.py
> now this is the error that i get:
>
> Traceback (most recent call last):
>   File "./tel.py", line 12, in <module>
>     for line in open(argv[1], 'r').readlines():
> IndexError: list index out of range

Your Python is installed fine.

The problem is that you're accesing argv[1], which would be the first
argument after the program in the command line, and you're executing
your program without any parameters.

All you need to do is read the error message, they help, ;)

Try executing your program with something like

  ./tel.py myfile.txt

where, of course, myfile.txt is some file you have around...

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From bignose+hates-spam at benfinney.id.au  Tue Mar 20 18:10:37 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 21 Mar 2007 09:10:37 +1100
Subject: help - Module needs access to another module
References: <1174398386.976864.109350@p15g2000hsd.googlegroups.com>
	<56a7j9F28bl1sU2@mid.uni-berlin.de>
	<1174400041.278036.183940@p15g2000hsd.googlegroups.com>
Message-ID: <87odmn5zxe.fsf@benfinney.id.au>

"abcd" <codecraig at gmail.com> writes:

> On Mar 20, 9:58 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> > http://docs.python.org/tut/node8.html
>
> got it, thanks.

Now that you've got that one part of the tutorial, please do *the
whole thing*. Start from the beginning, run each example and watch
what it does. Experiment with it until you understand what's going on,
then move on. Repeat until done.

You'll possibly see a bunch of things you have already learned, but
you *will* cover a lot of gaps in your knowledge that you don't even
know exist.

-- 
 \      "People always ask me, 'Where were you when Kennedy was shot?' |
  `\                     Well, I don't have an alibi."  -- Emo Philips |
_o__)                                                                  |
Ben Finney



From sebast.weber at wanadoo.fr  Sun Mar  4 06:18:14 2007
From: sebast.weber at wanadoo.fr (=?iso-8859-1?q?WEBER_S=E9bastien?=)
Date: 04 Mar 2007 11:18:14 GMT
Subject: SAMBA-PYTHON ???
Message-ID: <45eaaaf6$0$21150$7a628cd7@news.club-internet.fr>

Hello,

(I'm french and I speak english like a spanish cow : sorry.)

Does someone know how to use the samba-python tdb.so module ? I've been
looking for information about this on Google for 3 days and I've found not
a word. The only functions I can use are 'open()' and 'first_key()' : not
enough.

Thank's.

SW.


From Afro.Systems at gmail.com  Tue Mar 13 06:42:41 2007
From: Afro.Systems at gmail.com (Tzury)
Date: 13 Mar 2007 03:42:41 -0700
Subject: Setting System Date And Time
Message-ID: <1173782561.405032.85910@s48g2000cws.googlegroups.com>

Is it possible to modify the Systems' Date and Time with python?



From parker at hiredatum.demon.co.uk  Tue Mar  6 02:13:07 2007
From: parker at hiredatum.demon.co.uk (Ian Parker)
Date: Tue, 6 Mar 2007 07:13:07 +0000
Subject: Graphviz Python Binding for Python 2.5 on Windows?
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
	<45eca530$0$27390$ba4acef3@news.orange.fr>
	<1173160979.344083.91030@n33g2000cwc.googlegroups.com>
Message-ID: <stUJI9NDSR7FFwh3@hiredatum.demon.co.uk>

In message <1173160979.344083.91030 at n33g2000cwc.googlegroups.com>, Alex 
Li <likwoka at gmail.com> writes
>Thanks Michel, I will give it a try.
>
>Alex
>
>
>

You could simply generate the .dot files from python and do os.startfile 
on the dot file (which is what I do because it is remarkably easy!)

Regards
-- 
Ian Parker


From psdasilvaX at esotericaX.ptX  Fri Mar 23 10:41:04 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 23 Mar 2007 14:41:04 +0000
Subject: Still the __new__ hell ...
In-Reply-To: <mailman.5498.1174626593.32031.python-list@python.org>
References: <1174167360.522350@jubilee.claranet.pt>	<45fe7f46$0$2138$426a74cc@news.free.fr>	<1174337519.926611@jubilee.claranet.pt>	<46010e1a$0$2347$426a74cc@news.free.fr>
	<mailman.5498.1174626593.32031.python-list@python.org>
Message-ID: <1174674720.953469@jubilee.claranet.pt>

Gabriel Genellina escreveu:
> En Wed, 21 Mar 2007 07:51:32 -0300, Bruno Desthuilliers
> <bruno.42.desthuilliers at wtf.websiteburo.oops.com> escribi?:
> 
>> Paulo da Silva a ?crit :
>>> As a relatively inexperient
>>> in python, how could I know that a 'string' is an instance of
>>> basestring?
>>
>> By reading this newsgroup ?-)
> 
> Or asking Python itself:
> 
>>>> type("any string").mro()
> [<type 'str'>, <type 'basestring'>, <type 'object'>]
> 
> --Gabriel Genellina
> 

Good! ;-)
Paulo


From gagsl-py2 at yahoo.com.ar  Tue Mar 20 22:16:56 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 23:16:56 -0300
Subject: generating stats from stdout on a regular interval
References: <1174441516.876016.19360@y66g2000hsf.googlegroups.com>
Message-ID: <op.tpiomia7x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 22:45:16 -0300, russ <russell.sayers at gmail.com>  
escribi?:

> Very new to Python - but excited to see what is possible - it sounds
> very suitable for a project of mine I need a little help with.
>
> I've got an executable which writes out data to stdout in a CSV sort
> of format - I'd like to grab the data from stdout and create stats
> from it at a regular interval, i.e. every 10 min.  Probably push the
> stats out to a CSV file.
>
> The popen2 module can read the stdout just like a file, and the csv
> module can handle the reading / writing.  How do I go about
> 'processing' the stdout every 10 min?

The executable is continuously writting data to stdout, right?
So your code will likely be reading that output inside a loop - just check  
using time.time() if the desired interval has elapsed.
Maybe you'd prefer using the subprocess module instead of popen2.

-- 
Gabriel Genellina



From mikael at isy.liu.se  Wed Mar 14 06:02:05 2007
From: mikael at isy.liu.se (Mikael Olofsson)
Date: Wed, 14 Mar 2007 11:02:05 +0100
Subject: Communicating with a DLL under Linux
In-Reply-To: <45F6D87B.4070407@isy.liu.se>
References: <45F6D87B.4070407@isy.liu.se>
Message-ID: <45F7C81D.5020503@isy.liu.se>

Thanks for all the responces, both on and off list.

So, I should forget about the DLL, and if I intend to connect the thing 
to a Linux computer, I'll have to develop the code myself for 
communicating with it over USB. Fair enough. I might even try that.

I've done some surfing since yesterday. Why do I always do that after 
asking stupid questions in public? It turns out that a Nicolas Sutre has 
already ported the thing to Linux:

    http://linuxk8055.free.fr/

Velleman links to his solution from their product page

    http://www.velleman.be/ot/en/product/view/?id=351346

which might mean something. Nicolas solution is only 250 lines of C 
code. It #includes a usb.h, so I guess a lot of its functionality is 
hidden there. It seems structured enough, so I might be able to find 
some inspiration there.

I guess I have some reading to do before I can decide if I shall do this.

Anyway, thanks once again for the responces.

Not completely in dispair...
/MiO


From irstas at gmail.com  Mon Mar 26 08:48:38 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 26 Mar 2007 05:48:38 -0700
Subject: with timeout(...):
In-Reply-To: <56prsrF2am4a1U1@mid.uni-berlin.de>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
Message-ID: <1174913318.298278.222300@l77g2000hsb.googlegroups.com>

On Mar 26, 3:16 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> But to make that work reliably, it has to be ensured that no sideeffects
> occur while being in some_long_running_stuff. which doesn't only extend to
> python itself, but also external modules and systems (file writing, network
> communications...). Which can't be done, unless you use a time-machine.

Hey hey, isn't the Python mantra that we're all adults here? It'd
be the programmers responsibility to use only code that has no
side effects. I certainly can ensure that no side-effects occur in the
following code: 1+2. I didn't even need a time machine to do that :P
Or the primitive could be implemented so that Python
throws a TimeoutException at the earliest opportunity. Then one
could write except-blocks which deal with rolling back any undesirable
side effects. (I'm not saying such timeout feature could be
implemented in
Python, but it could be made by modifying the CPython implementation)



From gagsl-py2 at yahoo.com.ar  Thu Mar  1 07:40:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Mar 2007 09:40:37 -0300
Subject: urlDecode()
References: <1172706706.152350.56390@z35g2000cwz.googlegroups.com>
	<1172713540.467763.98810@t69g2000cwt.googlegroups.com>
Message-ID: <op.toif5zabx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 28 Feb 2007 22:45:40 -0300, gert <gert.cuykens at gmail.com> escribi?:

> import re
>
> def htc(m):
>     return chr(int(m.group(1),16))
>
> def urldecode(url):
>     rex=re.compile('%([0-9a-hA-H][0-9a-hA-H])',re.M)
>     return rex.sub(htc,url)
>
> if  __name__ == '__main__':
>     print urldecode('adasasdasd%20asdasdasdas')
>
> Ok thats it enough googeling around i make one my self :)

You reinvented urllib.unquote

-- 
Gabriel Genellina



From hardcoded.software at gmail.com  Wed Mar  7 19:34:27 2007
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 7 Mar 2007 16:34:27 -0800
Subject: Flatten a two-level list --> one liner?
In-Reply-To: <mailman.4778.1173312889.32031.python-list@python.org>
References: <mailman.4778.1173312889.32031.python-list@python.org>
Message-ID: <1173314066.947751.258930@v33g2000cwv.googlegroups.com>

On Mar 7, 7:14 pm, "Sergio Correia" <sergio.corr... at gmail.com> wrote:
> Hi,
>
> I'm looking for an easy way to flatten a two level list like this
>
> spam = [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]
>
> Into something like
> eggs = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>
> There are *no* special cases (no empty sub-lists).
>
> I have found two ways:
>
> 1) Accumulator
> eggs = []
> for x in eggs:
>        eggs.extend(x)
>
> 2) Reduce
> eggs = reduce(lambda x, y: x+y, spam)
>
> I feel the 1st way is too cumbersome (three lines), and although I
> like the 2nd way (except for the lambda part), I understand reduce is
> discouraged by Guido so I want to know if there is a "Better Way"(TM)
> ?
>
> Any ideas?
>
> Thanks,
> Sergio
>
> PS: Why does `sum` works only with numbers?

A search in the python group should get you all the details you need.

Quick answer: "sum(eggs, [])", but the "correct" way is to have a
flatten() function, with those 3 lines.



From bj_666 at gmx.net  Mon Mar 26 14:01:58 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Mon, 26 Mar 2007 20:01:58 +0200
Subject: how to abort on syntax errors
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <pan.2007.03.26.18.01.57.914648@gmx.net>

In <46080186$0$14151$b45e6eb0 at senator-bedfellow.mit.edu>, Josh wrote:

> I have a lot of except Exception, e statements in my code, which poses some 
> problems. One of the biggest is whenever I refactor even the triviallest 
> thing in my code.
> 
> I would like python to abort, almost as if it were a compile-time error, 
> whenever it cannot find a function, or if I introduced a syntax error. But, 
> instead, it merrily proceeds on its way.
> 
> Is there some idiom that you use in situations like these?

Just don't use so many ``except Exception:`` constructs that obviously
swallow exceptions they shouldn't swallow.

Ciao,
	Marc 'BlackJack' Rintsch


From skip at pobox.com  Tue Mar 13 08:41:59 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 13 Mar 2007 07:41:59 -0500
Subject: Request for a change in the csv module.
In-Reply-To: <1173785251.78605@jubilee.claranet.pt>
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
	<1173747644.616698@jubilee.claranet.pt>
	<55n53lF25s78sU1@mid.uni-berlin.de>
	<1173785251.78605@jubilee.claranet.pt>
Message-ID: <17910.39959.548972.889847@montanaro.dyndns.org>


    Paulo> That is not the point. The problem is to have things generalized.

Well, perhaps.  One of the goals of the csv module was to do things the way
Excel does things.  Ideally, that would include formatting elements with
locale sensitivity.  I've been working on a csv module in Python, so I
decided to try the locale.format() calls in its writerow implementation.  A
number of test cases broke as a result because apparently locale.format
doesn't do its job quite the same way Excel does.  I don't think pushing the
locale-sensitive formatting down into the csv module is going to be a
panacea.

Skip


From mark at freelance-developer.com  Sat Mar  3 11:56:07 2007
From: mark at freelance-developer.com (Mark Nenadov)
Date: Sat, 03 Mar 2007 11:56:07 -0500
Subject: Randomizing in Python
References: <1172940368.958826.273260@j27g2000cwj.googlegroups.com>
Message-ID: <pan.2007.03.03.16.56.07.572522@freelance-developer.com>

On Sat, 03 Mar 2007 08:46:09 -0800, andre.ditador9999 at gmail.com wrote:

>      I want to randomize a certain calculation in Python but haven't
> figured it out yet. To explain what i mean, I' m going to use an
> example:
>                         I want to get the numbers to do a random
> experience database for a game. What would be necessary to do so?


Look into the random module (http://docs.python.org/lib/module-random.html)

random.choice selects a random item out of a sequence
random.shuffle shuffles a sequence randomly
random.random gives a random floating point number

-- 
Mark Nenadov -> skype: marknenadov, web: http://www.marknenadov.com
-> "Relying on the government to protect your privacy is like asking a
peeping tom to install your window blinds." -- John Perry Barlow



From me at mylife.com  Tue Mar 27 14:23:05 2007
From: me at mylife.com (Jason B)
Date: Tue, 27 Mar 2007 18:23:05 GMT
Subject: 16bit RGB with Image module
References: <hcdOh.9548$JZ3.7651@newssvr13.news.prodigy.net>
Message-ID: <didOh.9549$JZ3.5804@newssvr13.news.prodigy.net>

Well I kept screwing around and funny thing, this works:

import sys, Image

if len(sys.argv) ==  2:
  print "\nReading: "+sys.argv[1]
  image_file = open(sys.argv[1], "rb")
  pixel_data = image_file.read()

im = Image.fromstring("RGB", (326, 325), pixel_data, "raw", "BGR;16")
im.show()

Although I have no idea *why* it works, other than the fact that I'm now 
using the correct number of bits per pixel.  :)

Anyone have thoughts on this?

Thanks!
J


"Jason B" <me at mylife.com> wrote in message 
news:hcdOh.9548$JZ3.7651 at newssvr13.news.prodigy.net...
> Hi all,
>
> I'm still new to all of this, but I'm trying to do something here that 
> *seems* like it should be pretty simple.  All I want to do is take an 
> array of pixel data from a file (no header data or anything, just pixel 
> data) in RGB565 format and save it off to a bitmap file - or display it, 
> in the case below:
>
> import sys, Image
>
> if len(sys.argv) ==  2:
>  print "\nReading: "+sys.argv[1]
>  image_file = open(sys.argv[1], "rb")
>  pixel_data = image_file.read()
>
> im = Image.fromstring("RGB", (326, 325), pixel_data)
> im.show()
>
> When run, I get:
>
> ValueError: not enough image data
>
> Which I'm pretty sure is because it's expecting a 24bit image.  Of course 
> if I tune down the width and height or change the format to B&W ("L") then 
> it *does* display an image, the B&W one even having recognizable features, 
> just not the right one.  :(
>
> I've read through the documentation a thousand times trying to understand 
> the raw decoder and plugins, etc. but I still can't figure this out...
>
> Any help is greatly appreciated!
>
> Thanks,
> J
> 




From aahz at pythoncraft.com  Tue Mar 20 16:48:08 2007
From: aahz at pythoncraft.com (Aahz)
Date: 20 Mar 2007 13:48:08 -0700
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
	<pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
	<4600476b$0$752$426a74cc@news.free.fr>
Message-ID: <etpha8$f1s$1@panix3.panix.com>

In article <4600476b$0$752$426a74cc at news.free.fr>,
Bruno Desthuilliers  <bdesth.quelquechose at free.quelquepart.fr> wrote:
>
>Not officially yet, true. But come on, it's been 6 (six) years since 
>type unification, and it has always been obvious (to me at least) that 
>the new object model was to replace the 'classic' one.

...in Python 3.0.  Anything else you believe is strictly a product of
your imagination.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From nagle at animats.com  Sat Mar 17 01:42:12 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 16 Mar 2007 22:42:12 -0700
Subject: mySQLdb versus platform problem
In-Reply-To: <45FB13EF.2050706@jessikat.plus.net>
References: <mailman.5184.1174060768.32031.python-list@python.org>
	<BhCKh.15696$bb1.10074@newssvr17.news.prodigy.net>
	<45FB13EF.2050706@jessikat.plus.net>
Message-ID: <adLKh.5490$tv6.959@newssvr19.news.prodigy.net>

Robin Becker wrote:
> John Nagle wrote:
> 
>> Try:
>>
>>     db=MySQLdb.connect(host='appx',db='sc_0',user='user',passwd='secret',
>>     use_unicode=True, charset = "utf8")
>>
>> The distinction is that "use_unicode" tells Python to convert to Unicode,
>> but Python doesn't know the MySQL table type.  'charset="utf8"' tells
>> MySQL to do the conversion to UTF8, which can be reliably converted
>> to Unicode.
>>
>>                     John Nagle
>>
>> .......
> 
> 
> OK that seems to help. However, my database has tables with different 
> encodings. Does MySQLdb ignore the table encoding? That would be a bit 
> lame.

    MySQLdb, the client, doesn't know the table encoding.  The
server end does.

> Also it still doesn't  explain the different behaviours between unix & 
> win32 (or perhaps different defaults are somehow magically decided upon).

    The default encoding is an environment thing.  It comes, somehow, from
the locale your system thinks it is in.

> -things were so much easier when bytes were bytes-ly yrs-
> Robin Becker

    So convert the database to Unicode/UTF-8 and have everything
be consistent.  MySQL 5 can do that dynamically with an ALTER
TABLE statement.

					John Nagle


From DustanGroups at gmail.com  Mon Mar 12 09:01:43 2007
From: DustanGroups at gmail.com (Dustan)
Date: 12 Mar 2007 06:01:43 -0700
Subject: New to Python
In-Reply-To: <mailman.4960.1173698053.32031.python-list@python.org>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
Message-ID: <1173704503.459048.310560@t69g2000cwt.googlegroups.com>

On Mar 12, 5:07 am, "Alberto Monteiro" <albm... at centroin.com.br>
wrote:
> I wrote:
>
> >> Hi, I am new to Python, how stupid can be the questions I ask?
>
> >> For example, how can I add (mathematically) two tuples?
> >> x = (1,2)
> >> y = (3,4)
> >> How can I get z = (1 + 3, 2 + 4) ?
>
> Wow, I really didn't expect that my silly little newbie question
> would get so many _different_ answers!
>
> What is the best way to get documentation about the functions
> and classes of python? I tried to google, but usually I can just
> find the __doc__ of the objects, without examples or anything that
> can help me use it.
>
> Alberto Monteiro

Refer to this as a reference:
http://docs.python.org/

It includes a tutorial and documentation on the functions and classes
in all the global modules, as well as builtin functions (http://
docs.python.org/lib/built-in-funcs.html) and syntax. If you have prior
experience with programming, you may be able to learn python from the
tutorial, but otherwise, I would highly recommend you get a good book
for beginners on python (http://wiki.python.org/moin/PythonBooks);
there's plenty of them out there.



From snakepit.rattlesnakes at gmail.com  Fri Mar  9 07:36:40 2007
From: snakepit.rattlesnakes at gmail.com (Joydeep Mitra)
Date: Fri, 9 Mar 2007 18:06:40 +0530
Subject: MPI in python?
Message-ID: <972566ff0703090436w3d99d2d6hdf76b58a9eebe2b9@mail.gmail.com>

Hi guys,
I am a relatively new user of python.
I wanted to know what are the minimum requirements (modules, etc) are
required for paralleliing python programs on a multiproc linux cluster.
Is there a tutorial that explains the MPI syntax in python with examples?

Thanking in advance,
Joydeep
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From steve at holdenweb.com  Wed Mar 14 15:07:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 15:07:09 -0400
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <45F843AD.6050509@gmx.net>
References: <45F843AD.6050509@gmx.net>
Message-ID: <et9h7k$ehr$1@sea.gmane.org>

Thomas Ploch wrote:
> Hello,
> 
> I have a cgi script that handles fileuploads from windows and *nix
> machines. i need os.path.basename(filename) to get the pure filename.
> 
> For *nix, thats not a problem, but for windows, it always returns the
> full path:
> 
> 
> 
> #/usr/bin/env python
> 
> import cgi, os
> import cgitb; cgitb.enable()
> 
> form = cgi.FieldStorage()
> filename = os.path.basename(form['uploadfile'].filename)
> 
> print 'Content-Type: text/html\n\n'
> print filename
> 
> 
> 
> -----------------
> 
> For 'C:\text\text.txt', the output is 'C:\text\text.txt', which should
> be 'text.txt', the same happens for 'C:\\text\\text.txt'. I think its
> the escapes that makes python not splitting it. All Unix style paths get
> converted the right way.
> 
> Is there an easy way around this, or do I really have to write a parser
> including _all_ Python escapes?
> 
> Thomas

First of all you should clarify your thinking about this issue. The 
problem isn't with os.path.basename (which assumes that paths are given 
for the local filestore architecture), the problem is that you are 
failing to correctly pre-condition your data. It's nothing to do with 
Python escapes - they are only relevant when you are writing string 
literals in Python. Pay no attention to the way the strings are printed 
- the Windows client is sending you a single backslash character for 
each path separator in its filename. You can check this using the len() 
function on the returned string.

Clearly if form['uploadfile'] is returning the client's path information 
you do have to remove that somehow before further processing, which also 
means you need to deduce what the client architecture is to correctly 
remove path data. Of course this also leaves open the question "what 
does a Mac client return?", and you might want to cater for that also.

I suspect you will also find that there are at least some circumstances 
under which a Unix browser will also include path information.

I presume you are looking to use the same filename that the user 
provided on the client? Does this mean that each user's files are 
stored in different directories? Otherwise it's not always a good idea 
to use filenames provided by the user for files on the server anyway.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From richard.leland at gmail.com  Wed Mar  7 06:42:49 2007
From: richard.leland at gmail.com (leland)
Date: 7 Mar 2007 03:42:49 -0800
Subject: re-point mod_python - is it possible?
In-Reply-To: <1173243624.574888.258390@h3g2000cwc.googlegroups.com>
References: <1173240491.770637.27440@t69g2000cwt.googlegroups.com>
	<1173243624.574888.258390@h3g2000cwc.googlegroups.com>
Message-ID: <1173267769.255639.118290@p10g2000cwp.googlegroups.com>

great explaination - thanks graham!



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 14 05:28:38 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 10:28:38 +0100
Subject: Iterating across a filtered list
In-Reply-To: <1173818667.789785.111220@d57g2000hsg.googlegroups.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
	<1173812047.578137.223430@j27g2000cwj.googlegroups.com>
	<7xmz2hndh0.fsf@ruckus.brouhaha.com>
	<45f70709$0$5892$426a34cc@news.free.fr>
	<1173818667.789785.111220@d57g2000hsg.googlegroups.com>
Message-ID: <45f7c030$0$6505$426a74cc@news.free.fr>

Arnaud Delobelle a ?crit :
> On Mar 13, 8:53 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>> Paul Rubin a ?crit :
> 
> [snip]
> 
>>>  Iterators like that are a new Python feature
>> List comps are not that new (2.0 or 2.1 ?):
>> print "\n".join([contact for name, contact in contacts.items() \
>>                   if search.match(name)])
> 
> You can write this, but:
>    * it is difficult to argue that it is more readable than Paul's (or
> my)  'imperative' version;

I personnaly find it more readable. To me, it tells what, not how.

>    * it has no obvious performance benefit,

No.

>>> and they have
>>> some annoying characteristics, like the way they mutate when you touch
>>> them.
>> While sequences are iterables, all iterables are not sequences. Know
>> what you use, and you'll be fine.
> 
> ...And know when to use for statements :)

Don't worry, I still use them when appropriate.


From knipknap at gmail.com  Sat Mar 17 19:54:29 2007
From: knipknap at gmail.com (Samuel)
Date: 17 Mar 2007 16:54:29 -0700
Subject: MIME Magic
In-Reply-To: <87fy834fdm.fsf@gmail.com>
References: <1174172570.473458.215460@y80g2000hsf.googlegroups.com>
	<87fy834fdm.fsf@gmail.com>
Message-ID: <1174175669.774906.225530@l77g2000hsb.googlegroups.com>

On Mar 18, 12:30 am, Jorge Godoy <jgo... at gmail.com> wrote:
> I'd start by taking a look at "file"'s code. :-)
>
> The thing is being able to identify the signatures of several different types
> of files.  Here's some help for you:http://www.garykessler.net/library/file_sigs.html
>
> And here's an example of an authoritative source for that table:http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html

Actually, I am looking for an existing solution because I do not want
to write it from scratch... I hope I am not out of options.

-Samuel



From steve at REMOVEME.cybersource.com.au  Tue Mar 13 21:14:49 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 14 Mar 2007 12:14:49 +1100
Subject: number generator
References: <mailman.5048.1173833625.32031.python-list@python.org>
Message-ID: <pan.2007.03.14.01.14.48.92442@REMOVEME.cybersource.com.au>

On Tue, 13 Mar 2007 17:53:41 -0700, Dick Moores wrote:

> At 05:47 PM 3/10/2007, Paul Rubin wrote:
> 
>>The fencepost method still seems to be simplest:
>>
>>     t = sorted(random.sample(xrange(1,50), 4))
>>     print [(j-i) for i,j in zip([0]+t, t+[50])]
> 
> =================================
> M = 50
> N = 4
> def sumRndIntRubin(M, N):
>      import random
>      t = sorted(random.sample(xrange(1,M), N-1))
>      lst = [(j-i) for i,j in zip([0]+t, t+[M])]
> 
>      print t
>      print t + [M]
>      print [0] + t
>      print lst
>      print sum(lst)
> 
> sumRndIntRubin(M, N)
> ====================================
> [6, 20, 31]
> [6, 20, 31, 50]
> [0, 6, 20, 31]
> [6, 14, 11, 19]
> 50
> 
> I understand what zip() and random.sample() are doing, and the above 
> helps me get inside the fencepost method, but I don't understand WHY 
> it works, or how in the world anyone could have devised it. It is 
> truly magical to me!

Me too. Although Alex Martelli's algorithm:

map([random.randrange(5) for i in xrange(45)].count, xrange(5))

(each value needs adjusting up by one) really boggles my brain. I'm going
to have to think about that.


> BTW I did see this in this thread, "Suppose you have a fixed 
> telegraph pole at N and a fixed telegraph pole at M, and you're given 
> 5 more telegraph poles..." (Gerard Flanagan), but even now I can't 
> take it anywhere. I guess I'm just a dim bulb. (I thought I was a 
> fairly smart guy until I took up Python.)

Consider the distance between each paid of consecutive poles. The sum of
the distances must add up to the distance from the first to the last, and
if there are two fixed poles plus five in between, there are five
distances.

Hence five (random) distances which sum to the required total.



-- 
Steven D'Aprano 



From codecraig at gmail.com  Fri Mar  9 15:24:27 2007
From: codecraig at gmail.com (abcd)
Date: 9 Mar 2007 12:24:27 -0800
Subject: Are Lists thread safe?
In-Reply-To: <1173469804.756713.41700@q40g2000cwq.googlegroups.com>
References: <1173467014.510693.60330@30g2000cwc.googlegroups.com>
	<1173469137.897102.298120@p10g2000cwp.googlegroups.com>
	<1173469517.797876.262330@t69g2000cwt.googlegroups.com>
	<1173469804.756713.41700@q40g2000cwq.googlegroups.com>
Message-ID: <1173471867.603306.135860@q40g2000cwq.googlegroups.com>

On Mar 9, 2:50 pm, "abcd" <codecr... at gmail.com> wrote:
> I guess this might be overkill then...
>
> class MyList(list):
>     def __init__(self):
>         self.l = threading.Lock()
>
>     def append(self, val):
>         try:
>             self.l.acquire()
>             list.append(self, val)
>         finally:
>             if self.l.locked():
>                 self.l.release()
>
> ....performing the same locking/unlocking for the other methods (i.e.
> remove, extend, etc).

comments?



From iltchevi at gmail.com  Sun Mar 11 18:39:08 2007
From: iltchevi at gmail.com (ici)
Date: 11 Mar 2007 15:39:08 -0700
Subject: a better solution for GUI in python
In-Reply-To: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
Message-ID: <1173652748.128071.87250@j27g2000cwj.googlegroups.com>

On Mar 11, 1:03 pm, "ce" <cedb... at yahoo.com> wrote:
> Hi,
>
> My company is using python currently for our website. We need to
> develop a GUI front-end for our ERP that would be portable (Windows
> and Linux).
>
> My question is which solution would be better for the GUI (and easier
> to implement)? I knew there are something like wxidgets, QT and pyGTK?
> actually we will need some complicated stuff in the GUI and yet I
> don't know much about GUI programming.
>
> Any recommendation guys?

http://pythoncard.sourceforge.net/ - Debugger, visual editor(resource
editor) , one place event handlers like on_Object_Command, uses
wxPython but easy than VB.



From fumanchu at amor.org  Sat Mar 10 15:57:23 2007
From: fumanchu at amor.org (fumanchu)
Date: 10 Mar 2007 12:57:23 -0800
Subject: Database module & multithreading
In-Reply-To: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
Message-ID: <1173560243.069846.307160@q40g2000cwq.googlegroups.com>

On Mar 10, 6:14 am, "jupiter" <anil.jupit... at gmail.com> wrote:
> Just one quick question... Which database module
> should I use when I want to use multi threading
> as my application requires lots of data from
> internet ???? I also want this database module
> to be fast, simple n efficient, in any case
> multi threading capabilities are # 1 requirement.

Any discussion of multithreaded database access should also address
isolation levels and locking scenarios. Have a look at the bottom of
http://projects.amor.org/docs/dejavu/1.5.0RC1/storage.html#comparison
... especially the footnotes. Note that Firebird and SQLite
immediately raise errors on locking conflicts, so you need to write
your own retry mechanisms. SQLServer and MySQL, in contrast, have
their own (configurable) timeout settings.


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From john.pye at gmail.com  Wed Mar 21 00:30:34 2007
From: john.pye at gmail.com (John Pye)
Date: 20 Mar 2007 21:30:34 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5372.1174450550.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
Message-ID: <1174451434.910082.231900@b75g2000hsg.googlegroups.com>

On Mar 21, 3:15 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Wed, 21 Mar 2007 00:46:03 -0300, John Pye
> <john.... at student.unsw.edu.au> escribi?:
>
> > This is not an option for me, as I want to pass the
> > FILE* from Python and all the way into into a existing shared-library
> > code. I can't change the latter; it must work ok with standard fprintf
> > (etc) functions.
>
> You can get the file descriptor from the Python file object using its
> fileno() method. The file descriptor lives at the OS level, so it's safe
> to pass around. You can regenerate a new FILE struct (using the other
> runtime library) with fdopen.
>
> --
> Gabriel Genellina

Hi Gabriel

Are you sure about this? My understanding is that 'fileno' is just a
FILE* cast to an integer. So it's a pointer to something (check out
stdio.h to see what it points to). Problem is (AFAICT) that Python 2.4
uses a different version of the C runtime DLL (MSVCRT*.DLL) to that
which MinGW links against. And it turns out that the different C
runtime libraries have incompatible implementations of the FILE
struct. And therefore if you try to pass a FILE* (fileno?) from Python
to MinGW you will get a segfault.

If there is more to your suggestion that I'm not seeing, please
clarify. Have you tried this with  MinGW actually?

Cheers
JP



From johnpenk7 at yahoo.com  Tue Mar 27 08:55:39 2007
From: johnpenk7 at yahoo.com (jp)
Date: 27 Mar 2007 05:55:39 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <mailman.5645.1174948910.32031.python-list@python.org>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
	<1174926951.133085.294900@l75g2000hse.googlegroups.com>
	<mailman.5645.1174948910.32031.python-list@python.org>
Message-ID: <1175000139.216317.22670@p77g2000hsh.googlegroups.com>

On Mar 26, 5:41 pm, John McMonagle <jmcmona... at velseis.com.au> wrote:
> jp wrote:
> >>> On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
> >>>> I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> >>>> I skip over these widgets when using the tab key?
> >>>> Thank you,
> >>>> John
>
> What version of Pmw are you using ?  Tabbing between widgets works fine
> on my system (Pmw 1.2,  tk 8.4, KDE)
>
> I can change the focus behaviour by using the takefocus option.  You
> were on the right track, you just did it wrong (see code below):
>
> ########################################################################
> from Tkinter import *
> import Pmw
>
> root = Tk()
> entry = Pmw.EntryField(root, labelpos=W, value="", label_text='Name:')
> entry.grid(row=1)
> entry.component('entry').configure(takefocus=0)
>
> Button(root,text='test1').grid(row=2)
> Button(root,text='test2').grid(row=3)
> Button(root,text='test3').grid(row=4)
>
> root.mainloop()
> #########################################################################
>
> Regards,
>
> John


Thank you for pointing out my error, John and James.  I had the syntax
of the command messed up.  Using the following does cause the field to
be skipped when tabbing:
entry.component('entry').configure(takefocus=0)

John



From aleax at mac.com  Tue Mar 20 01:29:54 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 19 Mar 2007 22:29:54 -0700
Subject: Documentation for "str()" could use some adjustment - Unicode
	issue
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
	<mailman.5276.1174294980.32031.python-list@python.org>
	<DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>
Message-ID: <1hv8tz5.l61xmz1mtprhiN%aleax@mac.com>

John Nagle <nagle at animats.com> wrote:
   ...
>     The real problem is the published books on Python:
> 
> "Learning Python", by Lutz and Ascher:
>     "str(string) -- returns the string representation of any object."
> 
> "Python in a Nutshell", by Martelli
>     Doesn't really address the issue, but says that "print" calls
> "str" for conversions.
> 
> Neither of these mentions that "str" is ASCII-only.

Are you looking at p. 109 of the 2nd edition of the Nutshell?  That's
where looking for str will eventually lead you.  The word "ASCII" is
nowhere in sight in this page (because it's only true if you don't
change the default encoding, so saying "str is ASCII-only" would be a
lie -- now THAT kind of disinformation WOULD be a "real problem" in a
"published book on Python") but right after the documentation for
__str__ you see that for __unicode__ which explains their respective
roles (returning plain-string types and unicode strings respectively).

Unicode is documented on page 198 ff, where you will clearly see that:
"""
Python uses a default encoding, normally 'ascii'.
"""
followed by pointers to modules and functions connected with changing
that default, and a recommendation to avoid doing that and why.

I therefore dispute your contention that "Python in a Nutshell"
``doesn't really address the issue", as well as your other contention
that "the real problem is" my book (I won't speak for Lutz and Ascher).

If you disagree, feel free to open an errata on O'Reilly's page devoted
to my book (and/or to the one by Lutz and Ascher); I will of course do
my best to strongly rebut your provably-false contentions, if it's my
book you choose to attack (I use the word advisedly, because it's easy
to see that you're not interested in offering constructive criticism and
suggestions -- it would have been obvious to open an errata, had you
been thus interested -- but only in picking a public fight about this).


Alex


From michele.simionato at gmail.com  Mon Mar 26 09:40:51 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 26 Mar 2007 06:40:51 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1174916451.809708.253720@p15g2000hsd.googlegroups.com>

On Mar 26, 9:20 am, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
> OK...
> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??
> Thanks
> Chris

The standard way is to perform the number crunching in Fortran and to
use
Python as glue. See for instance the scipy project, which includes the
f2py bridge.

 Michele Simionato



From steve at REMOVEME.cybersource.com.au  Thu Mar 22 23:03:12 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 23 Mar 2007 14:03:12 +1100
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
Message-ID: <pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>

On Fri, 23 Mar 2007 01:01:15 +0000, Mark wrote:

> So given the lack of response it seems that there is probably no such
> idiom and that I should not be concerned by the inefficiency inherent in
> running .py scripts directly?
> 
> I did some time tests and sure, the speed gain is slight, but it is a 
> gain none the less.

Since you've done these tests already, perhaps you can tell us what gain
you actually got?

Here's a test I did:

[steve at apple ~]$ time python script.py
the result is 166166000

real    0m0.555s
user    0m0.470s
sys     0m0.011s
[steve at apple ~]$ time python script.pyc
the result is 166166000

real    0m0.540s
user    0m0.456s
sys     0m0.011s


That gives me an absolute gain of 15ms which is a percentage gain of about
3%. But don't forget the time it takes you to type the extra "c" at the
end of the script, even with filename completion. The average human
reaction time is something between 200 and 270 milliseconds, so unless
you're saving at least 200ms, typing that extra "c" at the end actually
wastes time.

Of course you have to type the "c". You're not deleting the source files
away are you? *wink*



-- 
Steven D'Aprano 



From gabriel.hase at gmail.com  Fri Mar 23 09:08:21 2007
From: gabriel.hase at gmail.com (killkolor)
Date: 23 Mar 2007 06:08:21 -0700
Subject: "finally" for unit test
In-Reply-To: <Xns98FC7D56675EEduncanbooth@127.0.0.1>
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
	<Xns98FC7D56675EEduncanbooth@127.0.0.1>
Message-ID: <1174655301.114220.4260@e65g2000hsc.googlegroups.com>

I went with the TestCase.setUp() function.
Thanks a lot!



From jjl at pobox.com  Sun Mar 25 18:29:03 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 25 Mar 2007 22:29:03 GMT
Subject: A better webpage filter
References: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl>
Message-ID: <87ps6x2c07.fsf@pobox.com>

Anton Vredegoor <anton.vredegoor at gmail.com> writes:
[...]
> Most web pages I visit lately are taking so much room for ads (even
> with adblocker installed) that the mere 20 columns of text that are
> available for reading are slowing me down unacceptably. I have tried
[...]

http://webcleaner.sourceforge.net/


Not actually tried it myself, though did browse some of the code once
or twice -- does some clever stuff.

Lots of other Python-implemented HTTP proxies, some of which are
relevant (though AFAIK all less sophisticated than webcleaner), are
listed on Alan Kennedy's nice page here:

http://xhaus.com/alan/python/proxies.html


A surprising amount of diversity there.


John


From facundo at taniquetil.com.ar  Thu Mar 22 15:18:37 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Thu, 22 Mar 2007 19:18:37 +0000 (UTC)
Subject: What is the best way to upgrade python?
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
Message-ID: <etukqc$25k$2@sea.gmane.org>

yinglcs at gmail.com wrote:


> i am using red hat enterprise 4. It has python 2.3 installed. What is
> the best way to upgrade to python 2.4?
>
> I think one way is to compile python 2.4 from the source, but I can't
> remove the old one since when i do 'rpm -e python', i get error like
> 'failed dependencies'.

Install Py2.4 and actually start using it, are two different animals.

For example, I have installed Py2.4 and Py2.5 in my laptop. They
coexist, and there's no problem about this.

Telling all your installed applications to use the newer, it's not so
easy, mainly because you don't have the power to test and change every
installed application.

So let them be. Just install the new version, and use it.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From mail at microcorp.co.za  Sat Mar 10 03:48:22 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Sat, 10 Mar 2007 10:48:22 +0200
Subject: Need help with a string plz! (newbie)
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com><12v3ksihos7uj7a@corp.supernews.com><1173477047.467568.298090@p10g2000cwp.googlegroups.com><2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<1173488215.913014.130190@h3g2000cwc.googlegroups.com>
Message-ID: <01f501c762f1$48bc7860$03000080@hendrik>

<isr...elr at googlemail.com> wrote:

> Oh, thanks for the advice then. And as for Grant..look forward to
> seeing more of your posts.

YOW! - some recognition at last!

- Hendrik



From bignose+hates-spam at benfinney.id.au  Sun Mar  4 01:37:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sun, 04 Mar 2007 17:37:27 +1100
Subject: Non Sequitur
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
	<1172979629.812957.156820@i80g2000cwc.googlegroups.com>
	<_ftGh.8984$tD2.396@newsread1.news.pas.earthlink.net>
Message-ID: <87lkid1plk.fsf_-_@benfinney.id.au>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

> """
> 	I before E
> 		Except after C
> 	Or when sounded as A
> 		As in Neighbor and Weigh
> """

Yes, like the "A" sound in "weird" or "ceiling".

-- 
 \        "Most people don't realize that large pieces of coral, which |
  `\       have been painted brown and attached to the skull by common |
_o__) wood screws, can make a child look like a deer."  -- Jack Handey |
Ben Finney



From jjl at pobox.com  Sat Mar 24 11:15:21 2007
From: jjl at pobox.com (John J. Lee)
Date: Sat, 24 Mar 2007 15:15:21 GMT
Subject: [JOB] Sr. Python Developer, Northern VA
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
	<etul70$l3b$1@news4.zwoll1.ov.home.nl> <87aby59dy1.fsf@pobox.com>
	<pan.2007.03.24.02.58.22.896945@LacusVeris.com>
Message-ID: <871wje8ygd.fsf@pobox.com>

Chuck Rhode <CRhode at LacusVeris.com> writes:

> John J. Lee wrote this on Thu, 22 Mar 2007 21:16:13 +0000.  My reply is
> below.
> 
> > I sympathise but conventional wisdom (which surely has a lot of
> > truth in it) is that employers are not faced with the problem of
> > minimising false negatives (failing to hire when they should have
> > hired).  They are faced with the problem of minimising false
> > positives (hiring when they should not have hired).  That's a gross
> > simplification of course, but I'm sure you appreciate the point --
> > if you're hiring employees, being fairly risk-averse is probably
> > quite rational.
> 
> ... so what's this we hear of employers' (in the US) being so starved
> for talent that they're willing to bring in young men from overseas
> with 3.5 kids and 1.5 wives?

I honestly don't follow the connection between my statements about the
way things are and the ethical (?) position you appear to be pushing.
Please don't take offence when I ask you not to bother to elaborate,
though.


John


From beliavsky at aol.com  Mon Mar 19 12:09:47 2007
From: beliavsky at aol.com (Beliavsky)
Date: 19 Mar 2007 09:09:47 -0700
Subject: check if files are the same on Windows
Message-ID: <1174320587.618875.48290@y66g2000hsf.googlegroups.com>

A crude way to check if two files are the same on Windows is to look
at the output of the "fc" function of cmd.exe, for example

def files_same(f1,f2):
    cmnd    = "fc " + f1 + " " + f2
    return ("no differences" in popen(cmnd).read())

This is needlessly slow, because one can stop comparing two files
after the first difference is detected. How should one check that
files are the same in Python? The files are plain text.



From aleax at mac.com  Tue Mar  6 10:37:46 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 6 Mar 2007 07:37:46 -0800
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
	<1huivd7.7l18eh1paqp0aN%aleax@mac.com>
	<1173167838.173634.62810@c51g2000cwc.googlegroups.com>
Message-ID: <1hujkde.1ukd1ix1easo5cN%aleax@mac.com>

Martin Unsal <martinunsal at gmail.com> wrote:

> On Mar 5, 10:06 pm, a... at mac.com (Alex Martelli) wrote:
> > My favorite way of working: add a test (or a limited set of tests) for
> > the new or changed feature, run it, check that it fails, change the
> > code, rerun the test, check that the test now runs, rerun all tests to
> > see that nothing broke, add and run more tests to make sure the new code
> > is excellently covered, rinse, repeat.  Occasionally, to ensure the code
> > stays clean, stop to refactor, rerunning tests as I go.
> 
> From the way you describe your workflow, it sounds like you spend very
> little time working interactively in the interpreter. Is that the case
> or have I misunderstood?

I often do have an interpreter open in its own window, to help me find
out something or other, but you're correct that it isn't where I "work";
I want all tests to be automated and repeatable, after all, so they're
better written as their own scripts and run in the test-framework. I
used to use a lot of doctests (often produced by copy and paste from an
interactive interpreter session), but these days I lean more and more
towards unittest and derivatives thereof.

Sometimes, when I don't immediately understand why a test is failing
(or, at times, why it's unexpectedly succeeding _before_ I have
implemented the feature it's supposed to test!-), I stick a
pdb.set_trace() call at the right spot to "look around" (and find out
how to fix the test and/or the code) -- I used to use "print" a lot for
such exploration, but the interactive interpreter started by pdb is
often handier (I can look at as many pieces of data as I need to find
out about the problem).  I still prefer to run the test[s] within the
test framework, getting interactive only at the point where I want to
be, rather than running the tests from within pdb to "set breakpoints"
manually -- not a big deal either way, I guess.


Alex


From soyouthinkimgonnalikethis at hotmail.com  Sat Mar 31 09:38:53 2007
From: soyouthinkimgonnalikethis at hotmail.com (Eric Price)
Date: Sat, 31 Mar 2007 09:38:53 -0400
Subject: os.system questions
In-Reply-To: <BAY114-F19ECC8BD085DD0C805A7D6A0620@phx.gbl>
Message-ID: <BAY114-F3920EFB3672450585F1DE5A0620@phx.gbl>

Oops! The problem isn't in the os.system call. It's in the fact that I don't 
call the function. That is, I write a script called "test.py" with a 
function in it called "freshReboot". Now, how do I call that function from 
test.py? That is, how do I write a cron event such that "freshReboot" 
actually gets called when I run test.py?
TIA,
Eric


>From: "Eric Price" <soyouthinkimgonnalikethis at hotmail.com>
>To: khemkaamit at gmail.com
>CC: python-list at python.org
>Subject: Re: os.system questions
>Date: Sat, 31 Mar 2007 09:33:03 -0400
>
>Great! That seems to work fine:
>
>#!/usr/local/bin/python
>import re, os
>
>def freshReboot():
>	up = os.popen('uptime').readlines()
>	up = up[0]
>	if re.search('day|hour', up):
>		pass
>	else:
>		tup = re.split('min', up)
>		first = tup[0]
>		n = len(first)
>		char = first[n-3:n-2]
>		if re.match(' ', char):
>			os.system("/usr/local/etc/rc.d/zz_mysql_starter_script.sh")
>
>However, I don't see evidence that the os.system call at the end actually
>executes said script. The reason for this screwy script is because MySQL
>doesn't set the proper environment on boot and that screws up my Zope
>instances. So, I'll cron this script to run every 6 mins. If the server has
>been up less than 10 mins, this script will run. So, I rebooted the server
>and ran the script. But it didn't execute the os.system script at the end!
>If I run this from the python prompt instead:
>
>import re, os
>
>def a():
>	up = os.popen('uptime').readlines()
>	up = up[0]
>	up = " 7:25AM  up 2 mins, 1 user, load averages: 2.42, 1.01, 0.41"
>	if re.search('day|hour', up):
>		pass
>	else:
>		tup = re.split('min', up)
>		first = tup[0]
>		n = len(first)
>		char = first[n-3:n-2]
>		if re.match(' ', char):
>			print "gotcha!"
>
>it prints "gocha!" Now, that substitution for the "up" var is what I got as
>output from the "uptime" command at the shell prompt. So, obviously, it
>should be running the script! What am I doing wrong?
>TIA,
>Eric
>
>_________________________________________________________________
>Watch free concerts with Pink, Rod Stewart, Oasis and more. Visit MSN
>Presents today.
>http://music.msn.com/presents?icid=ncmsnpresentstagline&ocid=T002MSN03A07001
>
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
5.5%* 30 year fixed mortgage rate. Good credit refinance. Up to 5 free 
quotes - *Terms 
https://www2.nextag.com/goto.jsp?product=100000035&url=%2fst.jsp&tm=y&search=mortgage_text_links_88_h2a5d&s=4056&p=5117&disc=y&vers=910



From PrikrylP at skil.cz  Wed Mar 14 09:38:15 2007
From: PrikrylP at skil.cz (Petr Prikryl)
Date: Wed, 14 Mar 2007 14:38:15 +0100
Subject: Q: Cteni unicode retezcu ze souboru UTF-8 s BOM?
Message-ID: <E8AE1CAFC84D634A9CCC887B8AAB15EC1F24B8@skil01.skil.mistni>

Ahoj v?eci,

Tak n?jak prakticky poprv? se dost?v?m k tomu, 
jak p?e??st unicode ?et?zce ze souboru, kter?
je ulo?en ve form?tu UTF-8 se signaturou
na za??tku (BOM). N?jak se mi neda??.

M?m takov?to soubor.txt v UTF-8 s BOM
=====================================
Prvn? ??dek.
Druh? ??dek.
T?et? ??dek.
P???ern? ?lu?ou?k? k?? ?p?l ??belsk? ?dy.
=====================================

... a pust?m skript
=====================================
import codecs
f = codecs.open('soubor.txt', 'r', 'utf-8')
for line in f:
    print repr(line)
    print line[1:]
f.close()
=====================================

V?sledek vypad? takto
=====================================
C:\tmp>python a.py
u'\ufeffPrvn\xed \u0159\xe1dek.\r\n'
Prvn? ??dek.

u'Druh\xfd \u0159\xe1dek.\r\n'
ruh? ??dek.

u'T\u0159et\xed \u0159\xe1dek.\r\n'
?et? ??dek.

u'P\u0159\xed\u0161ern\u011b \u017elu\u0165ou\u010dk\xfd k\u016f\u0148 \xfap\u011bl \u010f\xe1belsk\xe9 \xf3dy.\r\n'
???ern? ?lu?ou?k? k?? ?p?l ??belsk? ?dy.
=====================================

V?imn?te si, ?e na prvn?m ??dku je \ufeff, co? je Byte Order Mark, 
kter? se tam v?bec nem? objevit. Jev? se mi to jako chyba. 
Na v?ech ??dc?ch z?m?rn? nevypisuji printem prvn? znak, 
proto?e u toho prvn?ho ??dku to krachne (co? je pochopiteln?).
?e?il n?kdo n?co podobn?ho? Mus? se BOM ukous?vat ve vlastn? re?ii?

D?ky, 
  pepr


From mark.dufour at gmail.com  Mon Mar 26 10:09:26 2007
From: mark.dufour at gmail.com (mark.dufour at gmail.com)
Date: 26 Mar 2007 07:09:26 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174158002.730076.22720@y80g2000hsf.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
	<1174158002.730076.22720@y80g2000hsf.googlegroups.com>
Message-ID: <1174918166.654117.307670@p77g2000hsh.googlegroups.com>


> FWIW, the original program can also be compiled with Shed Skin (http://
> mark.dufour.googlepages.com), an experimental (static-)Python-to-C++
> compiler, resulting in a speedup of about 8 times for a single test
> with 500 tuples. here's a slightly modified version that works with
> Shed Skin CVS at least:

after optimizing dicts a bit for Shedskin 0.0.21 (http://
mark.dufour.googlepages.com), the speedup for this program is now
about 16.5 times for the same test.


Thanks,
Mark Dufour (Shed Skin author - send me bug reports!)




From steve at holdenweb.com  Thu Mar 22 08:51:51 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 08:51:51 -0400
Subject: fine grain logging cotrol
In-Reply-To: <etttdr$nhk$1@sea.gmane.org>
References: <etttdr$nhk$1@sea.gmane.org>
Message-ID: <ettu7p$pqo$1@sea.gmane.org>

Eric S. Johansson wrote:
> I need to to be able to conditionally log based on the method the log 
> statement is in and one other factor like a log level.  in order to do 
> so, I need to be able to automatically find out the name of the method 
> and its class but I haven't found out how to do that yet.
> 
> for example,
> 
> class catus(Felis):
>    def Siamese_cat( yowl, purr, demand_food):
> 
>      ...
>      log("state of litter box %s"% litter_box.smell, level = 1)
> 
> 
> If the table of methods logged contains "catus.Siamese_cat", then I 
> would expect to see the output of the log statements in a log file.  If 
> not then I wouldn't see anything in the log.
> 
> Has somebody done this already?  Is it even possible to do without 
> manually adding the class and method information for every log statement?
> 
> a related question is using signals for reloading configurations etc.  I 
> have to find any good examples of how to use signals to cause a 
> long-running process to reload external data.  Any good pointers?
> 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66062

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From aleax at mac.com  Sun Mar 18 13:33:13 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 10:33:13 -0700
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
	<7xfy845q24.fsf@ruckus.brouhaha.com>
	<mailman.5220.1174128479.32031.python-list@python.org>
	<7xbqir9d05.fsf@ruckus.brouhaha.com>
	<1174238142.658049.13380@e65g2000hsc.googlegroups.com>
Message-ID: <1hv62l6.yav5zjodogp9N%aleax@mac.com>

7stud <bbxx789_05ss at yahoo.com> wrote:

> On Mar 18, 2:23 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> > Steve Holden <s... at holdenweb.com> writes:
> > > >    max(i for i,t in enumerate(x) if t <= y)
> > > > Those are actually pretty direct.
> >
> > > How about a solution (like the bisect one suggested almost as soon as
> > > this thread started) that doesn't iterate over the whole list.
> >
> > Here's a Haskell-inspired one:
> >
> >     len(list(itertools.takewhile(lambda t: y > t, x)))
> 
> Can you explain how list() works in that statement.  I looked up
> takewhile() and it returns an iterator that will automatically stop at
> the insertion point?  So does list() do an internal comprehension with
> the iterator?

Any call to list(iterator) works roughly as follows:

def likelist(iterator):
  result = []
  while True:
    try: result.append(iterator.next())
    except StopIteration: return result


Alex


From melirizarry at gmail.com  Thu Mar  1 09:05:17 2007
From: melirizarry at gmail.com (Mel)
Date: 1 Mar 2007 06:05:17 -0800
Subject: How do I Color a QTableView row in PyQt4
In-Reply-To: <29fbf$45e61974$54d1d767$18593@news.chello.no>
References: <1172685355.820708.149990@q2g2000cwa.googlegroups.com>
	<29fbf$45e61974$54d1d767$18593@news.chello.no>
Message-ID: <1172757917.160687.228650@z35g2000cwz.googlegroups.com>

On Feb 28, 5:08 pm, David Boddie <d... at boddie.org.uk> wrote:
> On Wednesday 28 February 2007 18:55, Mel wrote:
>
>
>
> > I am currently porting an SQL centered Visual Basic application to run
> > on Linux, Python, and Qt4.  Currently I am stumped on changing row
> > colors in the QTableView widget.  My test code is based on code from
> > the PyQt4  examples and looks like this:
>
> > *** Start Code ***
>
> > import sys
> > from PyQt4 import QtCore, QtGui, QtSql
>
> > import connection
>
> > class CustomSqlModel(QtSql.QSqlQueryModel):
> >     def data(self, index, role):
> >         value = QtSql.QSqlQueryModel.data(self, index, role)
> >         if value.isValid() and role == QtCore.Qt.DisplayRole:
> >             if index.column() == 0:
> >                 return QtCore.QVariant(value.toString().prepend("#"))
> >             elif index.column() == 2:
> >                 return QtCore.QVariant(value.toString().toUpper())
> >         if role == QtCore.Qt.TextColorRole and index.column() == 1:
> >             return QtCore.QVariant(QtGui.QColor(QtCore.Qt.blue))
> >         return value
>
> [Snipping the rest of the code to keep this post short.]
>
> > Column 18 in the table shows a number from 1 to 3.  I would like to
> > change the color of the row based on the value in column 18 but I have
> > not been able to find any resources that show me how.  Can anyone lend
> > a hand?
>
> It's interesting to see that you subclassed QSqlQueryModel instead of
> using a custom delegate to display the data. It's usually recommended
> that you subclass QItemDelegate if you want to customize the way items
> are represented, but you can also customize the model if you want.
>
> What you can do is to check to see if the requested role is the
> Qt.BackgroundRole and, if so, query the base class for the data in
> column 18 in the same row. Then you can supply a different colour
> (as a brush, actually) depending on the value you obtained.
>
>         if role == QtCore.Qt.BackgroundRole:
>             # Get the data from column 18.
>             column18_data = index.sibling(index.row(), 18).data()
>             # The data is stored in a QVariant, so we unpack it.
>             integer_value = column18_data.toInt()[0] # just the value
>             # Look up the associated color in a dictionary which you
>             # have already defined, and return it.
>             color = self.colors.get(integer_value, self.default_color)
>             return QtCore.QVariant(QtGui.QBrush(color))
>
> You might also find the following pages useful:
>
> http://www.riverbankcomputing.com/Docs/PyQt4/html/qt.html#ItemDataRol...http://doc.trolltech.com/4.2/model-view-model.html
>
> Good luck!
>
> David

Thanks David, that did work as I had hoped.  I just need to work on
the colors a bit and make them more appealing.

Here is my final code that works for the custom Sql Model.

class CustomSqlModel(QtSql.QSqlQueryModel):
    def data(self, index, role):
        value = QtSql.QSqlQueryModel.data(self, index, role)
        if value.isValid() and role == QtCore.Qt.DisplayRole:
            if index.column() == 0:
                return QtCore.QVariant(value.toString().prepend("#"))
            elif index.column() == 2:
                return QtCore.QVariant(value.toString().toUpper())
        if role == QtCore.Qt.TextColorRole and index.column() == 1:
            return QtCore.QVariant(QtGui.QColor(QtCore.Qt.blue))
        if role == QtCore.Qt.BackgroundRole:

            # Get the data from column 18.

            column18_data = index.sibling(index.row(), 18).data()

            # The data is stored in a QVariant, so we unpack it.

            integer_value = column18_data.toInt()[0] # just the value

            # Look up the associated color in a dictionary which you

            # have already defined, and return it.
            if integer_value == 1:

                return
QtCore.QVariant(QtGui.QBrush(QtGui.QColor(QtCore.Qt.red)))
            if integer_value == 2:

                return
QtCore.QVariant(QtGui.QBrush(QtGui.QColor(QtCore.Qt.yellow)))
            if integer_value == 3:

                return
QtCore.QVariant(QtGui.QBrush(QtGui.QColor(QtCore.Qt.green)))
        return value


Mel



From gregpinero at gmail.com  Fri Mar  9 15:22:02 2007
From: gregpinero at gmail.com (gregpinero at gmail.com)
Date: 9 Mar 2007 12:22:02 -0800
Subject: How to Start a (thread?) and Leave
Message-ID: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>

Here's my situation, would you folks be so kind as to reccomend an
approach?

I have a small Python CGI script running as an intranet app.  One of
the things the script needs to do is allow users to save invoices.
This is a process that takes about 60 seconds once the user submits
the order from the web app.

Ideally I'd like the CGI script to kick off a process to save the
invoice but not wait until it's finished to render the page.  What's
the best way to do this, a thread, call a separate program from
os.system, something else?

Thanks in advance for the help.

-Greg



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 16:13:43 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 18:13:43 -0300
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
	<slrnev2q3q.cis.mandus@oro.simula.no> <d2fIh.4$iC.1@newsfe22.lga>
Message-ID: <op.toxw85m0x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 09 Mar 2007 05:28:54 -0300, hg <hg at nospam.org> escribi?:

> Mandus wrote:
>> 8 Mar 2007 22:04:48 -0800 skrev bressert at gmail.com:
>>> I'm considering about generating some Python Bindings for C++
>>> libraries. What are considered the best tools for doing something like
>>> this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.
>>
>> We are doing this quite extensively at work, and have found that in the
>> long run SWIG is the best solution. OMMV, but if you ask me, the answer
>> is SWIG.
>
> Why do you think it is better than ctypes ?

I won't say SWIG is better than anything, but how would you use ctypes to  
create an instance of a class with several levels of inheritance, and then  
invoke a virtual method?
You have to mangle all the names (not too bad, can be done in Python  
following the rules) but you also need to find the right function pointer  
in the virtual method table; and that can't be done without processing the  
source code (at least the .h) in order to know the layout and ordering of  
the methods.
Let alone inline functions, templates and #define macros.

-- 
Gabriel Genellina



From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 16:54:39 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 22:54:39 +0100
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
Message-ID: <45ec89a4$0$2349$426a74cc@news.free.fr>

Adam Atlas a ?crit :
(snip)
> If you make a ZIP archive of
> this and run it through Squisher, you'll get a single .pyc file which
> can be imported by any Python installation anywhere just like any
> other module, without requiring users to install any supporting
> mechanisms (like setuptools),

setuptools offers *much* more than a convenient way to package source code.


From greg at cosc.canterbury.ac.nz  Tue Mar 13 20:01:37 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Wed, 14 Mar 2007 13:01:37 +1300
Subject: number generator
In-Reply-To: <mailman.5027.1173810470.32031.python-list@python.org>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>	<55fbgjF2492skU1@mid.individual.net>	<1173573654.009953.266280@30g2000cwc.googlegroups.com>	<7xbqj01u9c.fsf@ruckus.brouhaha.com>	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
Message-ID: <55osfiF25uqm7U1@mid.individual.net>

Gabriel Genellina wrote:
> The 5th number is not "random".

More precisely, the fifth number is not *independent*
of the others. You can't have five independent random
numbers that sum to 50; only four independent numbers
plus a dependent one.

--
Greg


From yinglcs at gmail.com  Sun Mar 11 14:48:45 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 11 Mar 2007 11:48:45 -0700
Subject: Need help in using mod_python
In-Reply-To: <45f43bf9$0$31995$426a74cc@news.free.fr>
References: <1173560794.835409.34400@v33g2000cwv.googlegroups.com>
	<45f43bf9$0$31995$426a74cc@news.free.fr>
Message-ID: <1173638925.764275.78690@n33g2000cwc.googlegroups.com>

On Mar 11, 1:02 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> ying... at gmail.com a ?crit :
>
>
>
> > Hi,
>
> > I am trying to setup Apache with Trac which uses mod_python. I get the
> > following error:
>
> > assert have_pysqlite > 0
>
> > And I have verify this  via command line as well, that seem no
> > problem.
>
> (snip)
>
> What do you get using tracd (the standalone server) ?

I am using apache with mod_python.

I have done a sanity check with command prompt, it can find
'pysqlite',
But when I access Trac using Apache (via mod_python), it somehow can't
find 'pysqlite' and gives me an error.

So my question is how python command prompt loads library differently
from mod_python?

 # python
Python 2.3.4 (#1, Feb  2 2005, 11:44:49)
[GCC 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.

>>> import trac.db.sqlite_backend
>>> trac.db.sqlite_backend._ver
(3, 3, 13)
>>> trac.db.sqlite_backend.have_pysqlite
2
>>> trac.db.sqlite_backend.sqlite.version

'2.3.3'



From khemkaamit at gmail.com  Tue Mar 13 01:52:08 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Tue, 13 Mar 2007 11:22:08 +0530
Subject: converting epoch time to string (and vice versa)
In-Reply-To: <45F639AA.1040209@al.com.au>
References: <45F639AA.1040209@al.com.au>
Message-ID: <1360b7230703122252n58825188n1a9b7ae66b59c989@mail.gmail.com>

On 3/13/07, Astan Chee <stanc at al.com.au> wrote:
> Hi,
> I have a string in this format "DD/MM/YYY" for example:
> tdate = "18/01/1990"
> and Im trying to convert this to epoch time, can anyone help?

import calendar
t = map(int,tdate.split('/'))
epochs = calendar.timegm((t[2], t[1], t[0], 0, 0, 0))

> Im also trying to convert that epoch time to the string format
> previously. Can anyone help this one too?

import time
time.ctime(epochs)

cheers,
amit.

-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From Leo.Kislov at gmail.com  Sun Mar 18 16:50:19 2007
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 18 Mar 2007 13:50:19 -0700
Subject: lock problem
In-Reply-To: <mailman.5225.1174142121.32031.python-list@python.org>
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
	<mailman.5170.1174032315.32031.python-list@python.org>
	<1174034766.213528.164170@e65g2000hsc.googlegroups.com>
	<mailman.5225.1174142121.32031.python-list@python.org>
Message-ID: <1174251019.868625.81650@y80g2000hsf.googlegroups.com>

On Mar 16, 3:08 pm, Ritesh Raj Sarraf <r... at researchut.com> wrote:
> Leo Kislov wrote:
> > But you miss the fact that there is only one environment per process.
>
> Maybe there's a confusion.
> The environment variable that I'm setting has noting to do with ldapsearch. I
> use the environment variable as a filename to which ldapsearch can redirect its
> output. And that I do is because the output can be huge and useless.
> Then I do some pattern matching on that file and filter my data and then delete
> it.
>
> If you think I still am missing something important, request you to describe it.

Imagine this timeline:

<thread1> os.environ['__kabc_ldap'] = '/tmp/tmp1'
<thread1 suspended, thread2 starts to run>
<thread2> os.environ['__kabc_ldap'] = '/tmp/tmp2'
<thread2> launch ldapsearch (output goes to '/tmp/tmp2')
<thread2 suspended, thread1 starts to run>
<thread1> launch ldapsearch (output goes to '/tmp/tmp2' over output
from ldapsearch launched from thread1)

Seems like that's what is happening to your program.

  -- Leo



From maxsteel at gmail.com  Fri Mar 30 15:19:33 2007
From: maxsteel at gmail.com (Max Steel)
Date: Fri, 30 Mar 2007 14:19:33 -0500
Subject: New to Python - Easy way to open a text file
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
	<1175270675.296617.83380@e65g2000hsc.googlegroups.com>
	<pan.2007.03.30.16.39.12.89800@gmx.net>
Message-ID: <HdGdnXXXLvNe_5DbnZ2dnUVZ_qSrnZ2d@giganews.com>

Hmm.. maybe it'd help if I explained that I'm playing with edna
http://edna.sourceforge.net/

I'll play with this simple code:
 f = open(r'pathToFile)
 for line in f:
    # do something with the line of text such as print it.
 f.close()

and this one from Skip:
    f = open(plainfiles.href, "r")
    print f.read()

and see if I can make a go of it.. I think it's the template portion that is 
mixing me up.. the template is what's used to create the look of the html on 
the edna server.

Thanks to all who replied so quickly, much appreciated!
.\\ax


"Marc 'BlackJack' Rintsch" <bj_666 at gmx.net> wrote in message 
news:pan.2007.03.30.16.39.12.89800 at gmx.net...
> In <1175270675.296617.83380 at e65g2000hsc.googlegroups.com>, kyosohma wrote:
>
>> I'm not familiar with ezt formats, however reading a text file is a
>> breeze.
>
> This sentence doesn't match the code that follow.  It's really simpler
> than that ``while`` loop.
>
>> f = open(r'pathToFile')
>> while True:
>> line = f.readline()
>> if not line: break
>> # do something with the line of text such as print it.
>>
>> f.close()
>
> f = open(r'pathToFile)
> for line in f:
>    # do something with the line of text such as print it.
> f.close()
>
> Ciao,
> Marc 'BlackJack' Rintsch 




From __peter__ at web.de  Thu Mar  1 06:10:09 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 01 Mar 2007 12:10:09 +0100
Subject: splitting perl-style find/replace regexp using python
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
Message-ID: <es6c7m$1k8$00$2@news.t-online.com>

John Pye wrote:

> Is there an easy and general way that I can split these perl-style
> find-and-replace expressions into something I can use with Python, eg
> re.sub('search','replace',str) ?

Another candidate:

>>> re.compile(r"(?:/((?:\\.|[^/])*))").findall(r"/abc\\/def\/ghi//jkl")
['abc\\\\', 'def\\/ghi', '', 'jkl']

Peter


From grflanagan at yahoo.co.uk  Tue Mar  6 05:03:33 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 6 Mar 2007 02:03:33 -0800
Subject: Any module to parse httpd.conf?
Message-ID: <1173175413.679940.310750@p10g2000cwp.googlegroups.com>

Hello,

Does anyone know of an existing module to parse httpd.conf files?

Thanks.



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 04:40:28 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 06:40:28 -0300
Subject: How to check whether file is open or not
References: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
Message-ID: <op.totbtq13x6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 02:28:33 -0300, Ros <pyalbert at gmail.com> escribi?:

> There are 10 files in the folder. I wish to process all the files one
> by one. But if the files are open or some processing is going on them
> then I do not want to disturb that process. In that case I would
> ignore processing that particular file and move to next file.
>
> How can I check whether the file is open or not?
>
> I tried os.stat and os.access but I am not getting the expected
> results.
> Also I checked in IO exceptions, IO error handler doesnt raise any
> error if the file is open.
> There are some options to check but they are platform dependent (works
> only with unix)

This works only on Windows:
You can use the _sopen function (from the C runtime library), which takes  
additional flags for specifying file sharing. See
http://msdn2.microsoft.com/en-us/library/aa273350(VS.60).aspx
_sopen with _SH_DENYRW will fail if the file is already open by the same  
or another process. Try to open the file using this flag: if _sopen  
succeeds (does not return -1) the file was not already open (remember to  
close it as soon as possible!); if _sopen fails (returns -1) it was  
already open.

Using the ctypes module (included with Python 2.5; you can download and  
install it for previous versions) you can call that function easily:

py> from ctypes import *
py> crt = cdll.msvcrt
py> _sopen = crt._sopen
py> _sopen.argtypes = (c_char_p, c_int, c_int, c_int)
py> _SH_DENYRW = 0x10 # from <share.h>
py> h = _sopen("C:\\1.txt", 0, _SH_DENYRW, 0)
py> h
3
py> h2 = _sopen("C:\\1.txt", 0, _SH_DENYRW, 0)
py> h2
-1
py> _close = crt._close
py> _close(h)
0
py> h2 = _sopen("C:\\1.txt", 0, _SH_DENYRW, 0)
py> h2
3
py> _close(h2)
0

Note: You said "But if the files are open or some processing is going on  
them then I do not want to disturb that process.". There exist a (small)  
risk of disturbing the other process: if it tries to open the file just  
after you opened it, but before you close it, the operation will fail. It  
is a tiny window, but might happen...

Surely there are other ways - some programs can report all processes  
having a certain file opened, by example, but I don't know how to do that.

-- 
Gabriel Genellina



From kyosohma at gmail.com  Thu Mar 29 10:14:49 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 07:14:49 -0700
Subject: Finding User Profile path
In-Reply-To: <mailman.5756.1175177029.32031.python-list@python.org>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>
	<mailman.5745.1175154506.32031.python-list@python.org>
	<1175173141.277735.192020@o5g2000hsb.googlegroups.com>
	<mailman.5755.1175174512.32031.python-list@python.org>
	<1175175904.199745.81460@y80g2000hsf.googlegroups.com>
	<mailman.5756.1175177029.32031.python-list@python.org>
Message-ID: <1175177689.254125.250390@b75g2000hsg.googlegroups.com>

On Mar 29, 9:05 am, Tim Golden <m... at timgolden.me.uk> wrote:
> kyoso... at gmail.com wrote:
> > On Mar 29, 8:23 am, Tim Golden <m... at timgolden.me.uk> wrote:
> >> kyoso... at gmail.com wrote:
> >>> One of my co-workers thought I could do
> >>> something like this:
> >>> c = wmi.WMI()
> >>> for i in c.Win32_UserAccount(Name=user):
> >>>     # Get user paths somehow.
> >>> I messed around with that, but I think he was mistaken. It has lots of
> >>> good info, but not what I need.
> >>> I apologize for not being specific. I will look at those win32net
> >>> functions.
> >>> Mike
> >> Might depend on what you mean by "profile" but would the
> >> users' homeDirectory/homeDrive active directory attributes
> >> or the profilePath be of use here? If so, they're fairly
> >> easy to get hold of.
>
> >> TJG
>
> > Yes. It's the homeDirectory as you say. Once again the IT community's
> > use of multiple terms for the same thing has bitten me.
>
> I take it you're OK for getting things out of AD?
>
> TJG

Actually no. Our organization does not use Active Directory. In fact,
the server I need to query happens to be an NT 4.0 box. We do have a
Win2k Server, but it is for specialized services.

Mike



From psdasilvaX at esotericaX.ptX  Fri Mar 23 14:37:50 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 23 Mar 2007 18:37:50 +0000
Subject: Join strings - very simple Q.
Message-ID: <1174675011.244339@jubilee.claranet.pt>

Hi!

I was told in this NG that string is obsolet. I should use
str methods.

So, how do I join a list of strings delimited by a given
char, let's say ','?

Old way:

l=['a','b','c']
jl=string.join(l,',')

New way?

Thanks
Paulo


From garrickp at gmail.com  Wed Mar  7 17:07:51 2007
From: garrickp at gmail.com (garrickp at gmail.com)
Date: 7 Mar 2007 14:07:51 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <1173305065.041154.41660@j27g2000cwj.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
	<1173304097.821562.75060@t69g2000cwt.googlegroups.com>
	<1173305065.041154.41660@j27g2000cwj.googlegroups.com>
Message-ID: <1173305271.294806.37470@n33g2000cwc.googlegroups.com>

On Mar 7, 3:04 pm, garri... at gmail.com wrote:
> On Mar 7, 2:48 pm, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
>
>
>
>
>
> > I'm not really thinking about this situation so let me clarify. Here
> > is a simple concrete example, taking the following for the functions
> > a,b,c I mention in my original post.
> >   - a=int
> >   - b=float
> >   - c=complex
> >   - x is a string
> > This means I want to convert x to an int if possible, otherwise a
> > float, otherwise a complex, otherwise raise CantDoIt.
>
> > I can do:
>
> > for f in int, float, complex:
> >     try:
> >         return f(x)
> >     except ValueError:
> >         continue
> > raise CantDoIt
>
> > But if the three things I want to do are not callable objects but
> > chunks of code this method is awkward because you have to create
> > functions simply in order to be able to loop over them (this is whay I
> > was talking about 'abusing loop constructs').  Besides I am not happy
> > with the other two idioms I can think of.
>
> > --
> > Arnaud
>
> Wouldn't it be easier to do:
>
> if isinstance(x, int):
>     # do something
> elif isinstance(x, float)t:
>     # do something
> elif isinstance(x, complex):
>     # do something
> else:
>     raise CantDoIt
>
> or,
>
> i = [int, float, complex]
> for f in i:
>     if isinstance(x, f):
>         return x
> else:
>     raise CantDoIt

I so missed the point of this. Not my day. Please ignore my post.



From chimalus at gmail.com  Fri Mar 30 13:20:49 2007
From: chimalus at gmail.com (jd)
Date: 30 Mar 2007 10:20:49 -0700
Subject: clean up html document created by Word
Message-ID: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>

I am looking for python code (working or sample code) that can take an
html document created by Microsoft Word and clean it up (if you've
never had to look at a Word-generated html document, consider yourself
lucky ;-)  Alternatively, if you know of a non-python solution, I'd
like to hear about it.

Thanks...

-- jeff



From lucastorri at gmail.com  Mon Mar 12 11:15:10 2007
From: lucastorri at gmail.com (Lucas Torri)
Date: Mon, 12 Mar 2007 12:15:10 -0300
Subject: backslashes in lists
In-Reply-To: <BAY126-W6DD4F050FEF6036835FEFD37D0@phx.gbl>
References: <BAY126-W6DD4F050FEF6036835FEFD37D0@phx.gbl>
Message-ID: <b58273130703120815t481734b6p76b4f9eb869fd215@mail.gmail.com>

I don't know how ugly this look like, but { print str(alist).replace('\\\\',
'\\') } works...

On 3/12/07, Fabio Gomes <flgoms at hotmail.com> wrote:
>
>  Yes, Luca.
>
>   I noticed that printing the list item will show the string as expected.
> But I need to print the entire list in the script I'm writing and doing
> that, the list will will be repr()'ed. Is there any way to print the entire
> list without being parsed by repr()?
>
>
>
> ------------------------------
> Date: Mon, 12 Mar 2007 12:00:19 -0300
> From: lucastorri at gmail.com
> To: flgoms at hotmail.com
> Subject: Re: backslashes in lists
> CC: python-list at python.org
>
> The backslash is a key to enter especial characters, like breakline: '\n'
>
> There is two backslashes cause of this especial condition of this char,
> but if you try print the specific string you will see that only one
> backslash remain:
>
> print alist[2]
>
> On 3/12/07, *Fabio Gomes* <flgoms at hotmail.com> wrote:
>
>  Hi list,
>
>   I'm trying to use a string with backslashes in a list. But Python parses
> strings in lists with repr().
>
>
> >>> alist = ['a', 'b', 'c:\some\path']
> >>> alist
> ['a', 'b', 'c:\\some\\path']
> >>> print alist
> ['a', 'b', 'c:\\some\\path']
>
>
>   I already tried str() and raw (r) but it didn't work. All I want is to
> keep a single backslash in the string since it is a path information.
>
>   Can anyone help me, please?
>
>   Thank you.
>
> ------------------------------
> O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na
> Web e sua rede amigos. Confira! <http://spaces.live.com/signup.aspx>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
>
> ------------------------------
> Busque em qualquer p?gina da Web com alta prote??o. Obtenha o Windows Live
> Toolbar GRATUITO ainda hoje! Experimente agora! <http://toolbar.live.com/>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From goodTweetieBird at hotmail.com  Wed Mar 21 14:33:52 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 11:33:52 -0700
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
Message-ID: <1174502032.402958.213090@y66g2000hsf.googlegroups.com>

On Mar 21, 8:36 am, "flit" <superf... at gmail.com> wrote:
> Hello All,
>
> I have a hard question, every time I look for this answer its get out
> from the technical domain and goes on in the moral/social domain.
> First, I live in third world with bad gov., bad education, bad police
> and a lot of taxes and bills to pay, and yes I live in a democratic
> "state" (corrupt, but democratic).
> So please, don't try to convince me about the social / economical /
> open source / give to all / be open / all people are honest until
> prove contrary / dance with the rabbits...
> Remember I need to pay bills and security.
> Now the technical question:
>
> 1 - There is a way to make some program in python and protects it? I
> am not talking about ultra hard-core protection, just a simple one
> that will stop 90% script kiddies.
>
> 2 - If I put the code in web like a web service, how can I protect my
> code from being ripped? There is a way to avoid someone using my site
> and ripping the .py files?
>
> Thanks and sorry for the introduction

Maybe an application for php. Then any html visible is not source but
result of execution of php.




From duncan.booth at invalid.invalid  Thu Mar 15 17:23:48 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Mar 2007 21:23:48 GMT
Subject: dict.items() vs dict.iteritems and similar questions
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
	<1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>
	<Xns98F4A2305FD17duncanbooth@127.0.0.1>
	<mailman.5140.1173979852.32031.python-list@python.org>
	<pan.2007.03.15.17.53.36.70287@gmx.net>
Message-ID: <Xns98F4D9A922DD5duncanbooth@127.0.0.1>

Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> In <mailman.5140.1173979852.32031.python-list at python.org>, skip wrote:
> 
>> Are you sure?  There's no guarantee that an iterator will terminate:
>> 
>>     len(list(itertools.cycle(range(10))))
> 
> You have infinite memory?  ;-)

Strangely, Skip's example is exactly the one I tested before posting my 
claim that it would terminate.


From psdasilvaX at esotericaX.ptX  Fri Mar  9 15:15:44 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 09 Mar 2007 20:15:44 +0000
Subject: bisect on a list of lists
Message-ID: <1173471342.957772@iceman.esoterica.pt>

Hi!

What is the best way to have something like the bisect_left
method on a list of lists being the comparision based on an
specified arbitrary i_th element of each list element?

Is there, for lists, something equivalent to the __cmp__ function for
classes?

Thanks.


From aleax at mac.com  Sun Mar 11 23:07:19 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 20:07:19 -0700
Subject: setuptools and code.google.com
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<7xps7f5ptp.fsf@ruckus.brouhaha.com>
	<1hutrb3.e1sbu5kvxk8nN%aleax@mac.com> <87odmznrbf.fsf@gmail.com>
	<1hutsxr.3pcc7j1w12q1oN%aleax@mac.com>
	<87fy8bnpny.fsf_-_@gmail.com>
Message-ID: <1hutu78.816hpgmmhn8jN%aleax@mac.com>

Jorge Godoy <jgodoy at gmail.com> wrote:
   ...
> > these subtleties... thanks for pointing out that there's a problem
> > btw!-)
> 
> Thanks for caring ;-)

Hey, I'd just love to make it as easy as possible to get gmpy -- that's
why I (shudder!-) even build and upload Windows installers...


> It looks for several things: eggs (for the Python version it is being used),
> zipfiles and tarballs (I dunno if it looks for more things). 
> 
> If it finds, for example, gmpy-1.0.2-py2.4.egg it won't install here 'cause I
> use Python 2.5 and then it will continue searching for gmpy-1.0.2-py2.5.egg or
> an alternative format that can be used.  The last resort is the tarball / zip
> with the sources so that the package can be rebuilt. 

OK, the .zip file IS there -- I don't know how to build .egg ones but of
course I could study up on it -- can you suggest a URL?

To be usable on Windows w/o effort, the packaged format must contain a
.pyd (and, on Mac, a .so, etc).  Can a .egg deal w/that?

I need to find out w/certainty, because once I've uploaded a file w/a
certain name I can't change the name, nor the contents -- the URLs on
code.google.com are meant to be permanent...

> Probably other people that are more experienced with it can help more.  I'm
> more an end user of it and I know the essential for my needs. 
> 
> I just pointed out because setuptools helps a lot on obtaining a package and
> installing it (even if there's some building needed before installing).

OK, but since most Windows users don't have a suitable C compiler, and
many Mac ones never bother installing the C compiler that comes with
their OS DVDs, if I'm to make things easy I definitely need to pack up
binaries.  How do I pack binaries (for dynamic link libraries) that need
to be very different on Win, Mac, various Linux distros...?

> Sorry for not being able to help more.
> 
> 
> With regards to the hyperlink, I believe that if the link on Pypi was to the
> URL above it would be easier.  Another alternative is a link at the first
> page.  And, of course, the last alternative is teaching setuptools how to work
> with code.google.com -- if it doesn't already know -- as it learnt how to work
> with SourceForge and its "random" mirrors.  I don't know how to write that
> code, though.

Me neither, knowing near to nothing about setuptools (I'm not even a
user of it...). Let's hope some expert does speak up -- I can't just
freely experiment with uploads and the like...


Alex


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 15 07:36:19 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 15 Mar 2007 12:36:19 +0100
Subject: print and softspace in python
In-Reply-To: <1173888776.475236.81720@d57g2000hsg.googlegroups.com>
References: <1173888776.475236.81720@d57g2000hsg.googlegroups.com>
Message-ID: <45f92f90$0$32298$426a74cc@news.free.fr>

Phoe6 a ?crit :
> print and softspace in python
> In python, whenever you use >>>print statement

Drop the '>>>' part. It's just the default Python shell prompt.

> it will append a
> newline by default. If you don't want newline to be appended, you got
> use a comma at the end (>>>print 10,)
> When, you have a list of characters and want them to be printed
> together a string using a for loop,

Why would one use a for loop to do so ? This is inefficient (even in C - 
it's mostly a system limitation). If you have a list of characters 
(actually, a list of one-character strings - there's no 'char' type in 
Python) and want to print it as a string, then first turn that list into 
a string, then print it:

 >>> list1=['a','b','c']
 >>> print "".join(list1)

HTH


From jon+usenet at unequivocal.co.uk  Wed Mar  7 12:43:32 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 7 Mar 2007 17:43:32 GMT
Subject: Recommended FastCGI module?
References: <W6tHh.1644$uo3.758@newssvr14.news.prodigy.net>
	<slrneut5u3.kpr.jon+usenet@snowy.squish.net>
	<EqCHh.5535$M65.1150@newssvr21.news.prodigy.net>
Message-ID: <slrneutue4.l5d.jon+usenet@snowy.squish.net>

In article <EqCHh.5535$M65.1150 at newssvr21.news.prodigy.net>, John Nagle wrote:
> Jon Ribbens wrote:
>>>	The "JonPy" version:
>>>	http://jonpy.sourceforge.net/fcgi.html
>>>	Last revised in 2004.
>> 
>> I'd recommend my one, but it's just possible I'm not impartial ;-)
> 
>     Does it work with current Pythons?  (2.4, 2.5)?  I'm mainly
> concerned about the abandonware problem with some of them.

Yes, I use it myself in my day job, where we have recently upgraded
to Python 2.5. jonpy itself hasn't been revised for a while because
there have been no revisions I felt necessary. There may be a new
version released in the next couple of months, but there won't be
any major changes.


From kyosohma at gmail.com  Wed Mar 21 09:16:10 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 21 Mar 2007 06:16:10 -0700
Subject: Exceptions and unicode messages
In-Reply-To: <fi8Mh.84$Ub6.17@read3.inet.fi>
References: <fi8Mh.84$Ub6.17@read3.inet.fi>
Message-ID: <1174482970.148046.291160@p15g2000hsd.googlegroups.com>

On Mar 21, 6:03 am, Tuomas <tuomas.vesteri... at pp.inet.fi> wrote:
> This works:
>  >>> raise StandardError(u'Wrong type')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> StandardError: Wrong type
>
> but don't in Finnish:
>  >>> raise StandardError(u'V??r? tyyppi')
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> StandardError>>>
>  >>>
>
> Any solution in Python?
>
> TV

When I do this, mine says "StandardError: <unprintable StandardError
object>" on both Python 2.4 and 2.5. I tried setting them to unicode,
but that didn't help. One way around this may be to subclass the
errors you want and do some custom processing that way.

Mike



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 14 16:52:14 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 21:52:14 +0100
Subject: Converting a list to a dictionary
In-Reply-To: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>
Message-ID: <45f8583d$0$10407$426a34cc@news.free.fr>

Samuel a ?crit :
> Hi,
> 
> is there a short version for this?
> 
> res_dict = {}
> for resource in res_list:
>   res_dict[resource.get_id()] = resource
> 
> This does not work:
> 
> res_dict = dict([r.get_id(), r for r in res_list])

res_dict = dict((r.get_id(), r) for r in res_list)

or if you have to be compatible with older python versions:

res_dict = dict([(r.get_id(), r) for r in res_list])

HTH


From rds1226 at sh163.net  Thu Mar  8 20:11:26 2007
From: rds1226 at sh163.net (John)
Date: Thu, 8 Mar 2007 20:11:26 -0500
Subject: any better code to initalize a list of lists?
Message-ID: <esqc9r$cn09$1@netnews.upenn.edu>

For my code of radix sort, I need to initialize 256 buckets. My code looks a 
little clumsy:

radix=[[]]
for i in range(255):
    radix.append([])

any better code to initalize this list? 




From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 14 16:47:10 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 21:47:10 +0100
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <mailman.5102.1173898151.32031.python-list@python.org>
References: <mailman.5102.1173898151.32031.python-list@python.org>
Message-ID: <45f8570f$0$10407$426a34cc@news.free.fr>

Thomas Ploch a ?crit :
> Hello,
> 
> I have a cgi script that handles fileuploads from windows and *nix
> machines. i need os.path.basename(filename) to get the pure filename.
> 
> For *nix, thats not a problem, but for windows, it always returns the
> full path:
> 
> 
> 
> #/usr/bin/env python
> 
> import cgi, os
> import cgitb; cgitb.enable()
> 
> form = cgi.FieldStorage()
> filename = os.path.basename(form['uploadfile'].filename)
> 
> print 'Content-Type: text/html\n\n'
> print filename
> 
> 
> 
> -----------------
> 
> For 'C:\text\text.txt', the output is 'C:\text\text.txt', which should
> be 'text.txt', the same happens for 'C:\\text\\text.txt'. I think its
> the escapes that makes python not splitting it. All Unix style paths get
> converted the right way.

Let me guess : your cgi script is running on *n*x ?-)

> Is there an easy way around this,

Probably.

 >>> fnames = "C:\\dir\\data.ext", "/dir/data.txt", "dir:data"
 >>> import ntpath, posixpath, macpath
 >>> def basename(filename):
...     for m in ntpath, posixpath, macpath:
...             if m.sep in filename:
...                     return m.basename(filename)
...     else:
...             # XXX
...             raise SomeException('could not do the job')
...
 >>> for f in fnames:
...     print f, basename(f)
...
C:\dir\data.ext data.ext
/dir/data.txt data.txt
dir:data data
 >>>

Might need some improvements, but you get the idea...

HTH


From chris.lasher at gmail.com  Tue Mar 27 15:50:37 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 27 Mar 2007 12:50:37 -0700
Subject: PDB does not allow jumping to first statement?
In-Reply-To: <1174989571.857680.318720@o5g2000hsb.googlegroups.com>
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
	<1174989571.857680.318720@o5g2000hsb.googlegroups.com>
Message-ID: <1175025037.464283.260680@e65g2000hsc.googlegroups.com>

On Mar 27, 5:59 am, "rocky.bernst... at gmail.com"
<rocky.bernst... at gmail.com> wrote:
> I tried on GNU/Linux and Python versions 2.4 and 2.5 and get the same
> behavior. Best as I can tell, it looks like a bug in Python. pdb,
> pydb, rpdb2 all handle the "jump" command by changing the frame
> f_lineno value. When the corresponding code pointer has offset 0 (or
> equivalently and more simlply as you put it, is the first statement)
> this doesn't seem to work properly. But this also implies that all you
> need to do is add something as the first statement. A docstring
> comment, e.g.
> "this is what my program does..."
> comes to mind :-)

I started implementing this, but it's a hack. Looks like it's time for
me to file a bug report!

> Lastly, I'll mention that I what most folks want to do is not jump to
> the beginning of the program but rather *restart* it. The difference
> here as applied to your example is seen in the way variables (e.g. a,
> b, and c) are handled. In a "restart", those names would go back to
> being undefined and referring to them before assigning to them would
> cause a NameError exception. With "jump", they retain their existing
> values.

In the case I was working with, I really did want to "jump" and retain
the values, rather than restart and clear those values.

Just as an aside, Rocky, I really like your ShowMeDo on pydb. Thanks
for making that. (For those who haven't seen it, check out the
"Introducing the pydb Debugger" at <http://showmedo.com/videos/Python>)



From MonkeeSage at gmail.com  Sat Mar  3 21:06:11 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 18:06:11 -0800
Subject: class attrdict
In-Reply-To: <1hueupp.1dcf9wl17pyf2bN%aleax@mac.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
	<45e9b753$0$8983$4c368faf@roadrunner.com>
	<1huecz7.1thcn0b1j64biiN%aleax@mac.com>
	<1172960883.340892.183850@31g2000cwt.googlegroups.com>
	<1hueupp.1dcf9wl17pyf2bN%aleax@mac.com>
Message-ID: <1172973970.929910.111000@s48g2000cws.googlegroups.com>

On Mar 3, 7:54 pm, a... at mac.com (Alex Martelli) wrote:
> Besides missing the warning in the __init__, this also has pretty weird
> behavior whenever subject to a .pop, .update, .setdefault, del of either
> item or attr, etc, etc: the attributes and items "get out of sync" (and,
> catching each and every mutating-method to keep the separate dicts of
> items and attrs in perfect sync is somewhat of a nightmare).

Good points. There are many complexities involved, and little actual
gain. Saving three or four chars isn't worth all the trouble. I hadn't
fully thought-out the situation.

Regards,
Jordan



From email at christoph-haas.de  Thu Mar 15 11:15:42 2007
From: email at christoph-haas.de (Christoph Haas)
Date: Thu, 15 Mar 2007 16:15:42 +0100
Subject: Multiline code - trailing slash usage
In-Reply-To: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
References: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>
Message-ID: <200703151615.42919.email@christoph-haas.de>

On Thursday 15 March 2007 15:57, abcd wrote:
> When do I need to use a trailing slash to separate code over multiple
> lines.
>
> For example:
>
> x = "hello world, this is my multiline " + \
>      "string!!!!"

Needed. Although you can omit the "+".

> x = {'name' : \
>       'bob'}

Not needed because you are inside the curly brackets {} and it's clear 
where the statement ends.

> Do I need to use the "\" in the above examples?  When do i need to use
> it?

Cheers
 Christoph


From kyosohma at gmail.com  Tue Mar 20 10:44:56 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 07:44:56 -0700
Subject: How to send
In-Reply-To: <mailman.5334.1174393316.32031.python-list@python.org>
References: <mailman.5334.1174393316.32031.python-list@python.org>
Message-ID: <1174401896.743804.31350@o5g2000hsb.googlegroups.com>

On Mar 20, 7:21 am, "Admir Saric" <lav... at hotmail.com> wrote:
> Hi,
>
> i have created an application in pygtk. The application creates files with
> its own file type and extensions and saves them. I would like to extend the
> application to be able to send these files over WLAN. I would use the
> application in my Nokia 770 Internet tablet and send the files from one
> tablet to the other. Does anybody know how to make python application send
> files over the WLAN.
>
> Best regards
> Admir
>
> _________________________________________________________________
> Schlagerfeber p? MSN!http://festival.msn.se/

Probably the easiest way to do this would be to use either the socket
module or the smtp module

Sockets:
http://www.amk.ca/python/howto/sockets/
http://www.quepublishing.com/articles/article.asp?p=686162&rl=1

SMTP:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52243

You could even do FTP:
http://snippets.dzone.com/posts/show/711

Good luck!

Mike



From __peter__ at web.de  Sun Mar 25 05:58:00 2007
From: __peter__ at web.de (Peter Otten)
Date: Sun, 25 Mar 2007 11:58:00 +0200
Subject: Class factory functions
References: <pan.2007.03.25.09.51.37.438285@REMOVE.THIS.cybersource.com.au>
Message-ID: <eu5guv$qc4$01$1@news.t-online.com>

Steven D'Aprano wrote:

> Here's a simple class-factory function that returns a sub-class of the
> old-style class it is passed.
> 
> def verbosify_oclass(klass):
> """Returns a verbose sub-class of old-style klass."""
> class VClass(klass):
> def __init__(self, *args, **kwargs):
> print "Calling initializer __init__ ..."
> klass.__init__(self, *args, **kwargs)
> return VClass
> 
> 
> Here it is in action:
> 
>>>> class Parrot:
> ...     def __init__(self, colour): self.colour = colour
> ...
>>>> VParrot = verbosify_oclass(Parrot)
>>>> bird = VParrot('red')
> Calling initializer __init__ ...
>>>> bird.colour
> 'red'
> 
> 
> Here's an equivalent for new-style classes. It uses super() because I
> understand that super() is preferred to calling the super-class by name.
> 
> 
> def verbosify_nclass(klass):
>     """Returns a verbose sub-class of new-style klass."""
>     class VClass(klass):
>         def __new__(cls, *args, **kwargs):
>             print "Calling constructor __new__ ..."
>             return super(klass, cls).__new__(cls, *args, **kwargs)
>         def __init__(self, *args, **kwargs):
>             print "Calling initializer __init__ ..."
>             super(klass, self).__init__(*args, **kwargs)
>     return VClass
> 
> 
> 
> But it doesn't work:
> 
>>>> vint = verbosify_nclass(int)
>>>> vint(42)
> Calling constructor __new__ ...
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
>   File "<stdin>", line 6, in __new__
> TypeError: object.__new__(VClass) is not safe, use int.__new__()
> 
> 
> What am I doing wrong?

Why would you skip VClass in the super() calls? This should work:

def verbosify_nclass(klass):
    """Returns a verbose sub-class of new-style klass."""
    class VClass(klass):
        def __new__(cls, *args, **kwargs):
            print "Calling constructor __new__ ..."
            return super(VClass, cls).__new__(cls, *args, **kwargs)
        def __init__(self, *args, **kwargs):
            print "Calling initializer __init__ ..."
            super(VClass, self).__init__(*args, **kwargs)
    return VClass

Peer


From tundra at tundraware.com  Fri Mar 23 01:53:22 2007
From: tundra at tundraware.com (Tim Daneliuk)
Date: Fri, 23 Mar 2007 00:53:22 -0500
Subject: How can I check if the listdir result a directory?
In-Reply-To: <1174628417.345912.91410@l75g2000hse.googlegroups.com>
References: <1174628417.345912.91410@l75g2000hse.googlegroups.com>
Message-ID: <dj6cd4-ugm2.ln1@eskimo.tundraware.com>

Plissken.s at gmail.com wrote:
> I have the following code which list out all the files/directories
> under the current directory.
> 
> But how can I find out if 'f' is a directory?
> 
> for f in os.listdir("."):
>      // how can I check if 'f' a directory?
> 

Try os.path.isdir()

-- 
----------------------------------------------------------------------------
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/


From brad at allendev.com  Sat Mar 10 11:01:20 2007
From: brad at allendev.com (Brad Allen)
Date: Sat, 10 Mar 2007 10:01:20 -0600
Subject: [python-advocacy] A Pythonic Way to Measure and Improve Your 
	Programming Skills?
In-Reply-To: <45F14D7E.3060707@taupro.com>
References: <45F14D7E.3060707@taupro.com>
Message-ID: <a06230908c2187f182731@[192.168.1.242]>

At 6:05 AM -0600 3/9/07, Jeff Rush wrote:
>Prior to PyCon I'd been thinking about some kind of campaign, service or
>documents, that I call "So you think you know Python...".  My initial idea was
>for use by Python programmers, who are honest with themselves, to have a way
>to measure their knowledge.

A interactive Python skills test could be useful, fun, and popular, 
if designed well.
There are a lot of Python programmers who are serious about honing 
their skills,
and enjoy doing so.

Building a good interactive test is a big project; I hope we can get community
buy-in and participation for this idea. I'll volunteer to be a tester, and to
help with brainstorming ideas for content.

At 6:05 AM -0600 3/9/07, Jeff Rush wrote:
>I've been carefully watching Crunchy, about which a talk was given at PyCon,
>for writing tutorials that, with its "doctests" feature, could be used to
>propose tests that pass and require a candidate to write an acceptable
>program.

Crunchy has great possibilities, especially if we can find a good way to use
it on the web instead of requiring a download to run locally. However,
there is an obvious security problem with giving web users access to a Python
interpreter on the web server.

When I discussed this problem with Michael Bernstein at PyCon he suggested
the idea of creating a "chroot jail" for each web session which could run
the Python interpreter in a secure sandbox. That might be easier than giving
each session a whole virtual server.

Are there any experienced sysadmins reading this who know of a practical way
solve this problem so we can have Crunchy tutorials on the web?



From dd55 at cornell.edu  Wed Mar 14 17:07:51 2007
From: dd55 at cornell.edu (Darren Dale)
Date: Wed, 14 Mar 2007 17:07:51 -0400
Subject: string formatting: engineering notation
References: <et9l3u$e57$1@ruby.cit.cornell.edu>
	<mailman.5113.1173906028.32031.python-list@python.org>
Message-ID: <et9o77$qfi$2@ruby.cit.cornell.edu>

Steve Holden wrote:

> Darren Dale wrote:
>> Does anyone know if it is possible to represent a number as a string with
>> engineering notation (like scientific notation, but with 10 raised to
>> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
>> decimal.Decimal class, but repeatedly instantiating Decimals is
>> inefficient for my application (matplotlib plotting library). If it is
>> not currently possible, do you think the python devs would be receptive
>> to including support for engineering notation in future releases?
>> 
> How close is this:
> 
>   >>> "%.3e" % 3.14159
> '3.142e+00'

>>> "%.3e" % 31415.9
'3.142e+04'

What I am looking for is '31.4159e+03'

Darren



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar 22 16:06:32 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 22 Mar 2007 21:06:32 +0100
Subject: My MVC critique
In-Reply-To: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
References: <1174573765.410866.56510@y66g2000hsf.googlegroups.com>
Message-ID: <4602d943$0$7444$426a74cc@news.free.fr>

scott.w.white at gmail.com a ?crit :
(snip)
<ot>
> What MVC does not emphasis is the separation of the data access layer,

Why should it ? Smalltalk is not only a language, it's a complete 
environment that provides automatic persistency.

(snip some more OT stuff)
</ot>

And what's your question about Python, exactly ?


From MonkeeSage at gmail.com  Thu Mar  1 14:27:50 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Mar 2007 11:27:50 -0800
Subject: xml minidom redundant children??
In-Reply-To: <54omjoF21oduuU1@mid.uni-berlin.de>
References: <1172774813.293437.108250@v33g2000cwv.googlegroups.com>
	<54omjoF21oduuU1@mid.uni-berlin.de>
Message-ID: <1172777270.294820.10220@n33g2000cwc.googlegroups.com>

On Mar 1, 12:46 pm, bkamr... at gmail.com wrote:
> As a newbie, I'm trying to simply parse a xml file using minidom, but
> I don't know why I get some extra children(?). I don't know what is
> wrong in xml file, but I've tried different xml files, still same
> problem.

Most simply, if you need to stick with xml.dom.minidom; just check the
nodeType and make sure its not 3 (textNode):

from xml.dom import minidom
doc = minidom.parse(fileTest)
for item in doc.documentElement.childNodes:
    if not item.nodeType == 3:
        print item.nodeName

Regards,
Jordan



From bbxx789_05ss at yahoo.com  Mon Mar 19 00:38:37 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 18 Mar 2007 21:38:37 -0700
Subject: class objects, method objects, function objects
Message-ID: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>

Hi,

I'm trying to figure out what this passage from GvR's tutorial means:
-------
Class definitions, like function definitions (def statements) must be
executed before they have any effect....

When a class definition is entered, a new namespace is created...

When a class definition is left normally (via the end), a class object
is created.

If you still don't understand how methods work, a look at the
implementation can perhaps clarify matters. When an instance attribute
is referenced that isn't a data attribute, its class is searched. If
the name denotes a valid class attribute that is a function object, a
method object is created by packing (pointers to) the instance object
and the function object just found together in an abstract object:
this is the method object.
-----------

Here is my diagram of the above:

               class object
   ----------------------------------------
  |  class MyClass:                        |
  |      def __init__(self):               |
  |            self.name = "GvR"           |
  |      def sayHi(self):                  |
  |            print "Hello " + self.name  |
  |________________________________________|


x = MyClass()
x.sayHi()  #the "class search" begins which initiates the
           #creation of the method object:


            method object              instance object
          -----------------            --------------
         |  ptr1 ----------|--------> |x = MyClass() |
         |  ptr2           |          |______________|
         |   |             |
         |___|_____________|
             |
             |
             V
       function object
 ---------------------------------
|  def sayHi(self): print "hello" |
|_________________________________|

But the last part of the passage makes no sense to me:
------
When the method object is called with an argument list, it is unpacked
again, a new argument list is constructed from the instance object and
the original argument list, and the function object is called with
this new argument list.
------
Can anyone interpret that for me?



From martinunsal at gmail.com  Tue Mar  6 12:55:23 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 09:55:23 -0800
Subject: Project organization and import
In-Reply-To: <DNhHh.7106$PL.1595@newsread4.news.pas.earthlink.net>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
	<45ed41f7$0$21515$426a74cc@news.free.fr>
	<1173198244.092412.17400@n33g2000cwc.googlegroups.com>
	<DNhHh.7106$PL.1595@newsread4.news.pas.earthlink.net>
Message-ID: <1173203718.520489.161040@t69g2000cwt.googlegroups.com>

On Mar 6, 9:46 am, Dennis Lee Bieber <wlfr... at ix.netcom.com> wrote:
>         The only usage I've ever made of "reload()" has been during
> interactive debugging: Modify the module, then reload it at the
> interactive prompt so I could create an instance of the modified code,
> and manually manipulate it.

That's exactly what I want to do. That's exactly what I'm having
trouble with.

Martin



From kyosohma at gmail.com  Mon Mar 26 12:27:51 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 09:27:51 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174925855.552135.228190@n59g2000hsh.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
Message-ID: <1174926471.899631.228810@e65g2000hsc.googlegroups.com>

On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
> On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> > I skip over these widgets when using the tab key?
>
> > Thank you,
> > John
>
> I would probably write some custom event handling. Something that
> could tell it was a key-press event and not just an on-focus event.
> Then it would be a simple, if key-press == tab, put focus on next
> widget of interest. Something like that should work.
>
> Mike

I looked in my Tkinter book, and it says that if the widget has the
"takefocus" option set to true, the widget is placed in the tab group
and will get focus when they are tabbed to. I assume that this means
if you set the PMW widgets' "takefocus" option to false, they will be
skipped over since they won't be in the tab group.

Mike



From irmen.NOSPAM at xs4all.nl  Sun Mar 11 07:36:42 2007
From: irmen.NOSPAM at xs4all.nl (Irmen de Jong)
Date: Sun, 11 Mar 2007 12:36:42 +0100
Subject: distributed queue?
In-Reply-To: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
Message-ID: <45f3e9ca$0$79139$e4fe514c@news.xs4all.nl>

Paul Rubin wrote:
> Does anyone have an implementation of a distributed queue?  I.e. I
> have a long running computation f(x) and I'd like to be able to
> evaluate it (for different values of x) on a bunch of different
> computers simultaneously, the usual "worker thread" pattern except
> distributed across a network.  I guess this is pretty easy to write
> with a centralized socket listener that dispatches requests through a
> Queue to multiple threads on the same machine, each talking
> synchronously to a server socket.  I wonder if something like it
> already exists.  I see a little bit of discussion in the newsgroup
> archive but no obvious pointers to code.
> 
> Thanks.

Pyro (http://pyro.sf.net) contains 2 examples that do just this.
One is a distributed merge sort / md5 "cracker", the other is
distributed prime factorization of a set of numbers.

--Irmen


From bbxx789_05ss at yahoo.com  Tue Mar 20 11:27:59 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 20 Mar 2007 08:27:59 -0700
Subject: class objects, method objects, function objects
In-Reply-To: <DvJLh.14450$tD2.8463@newsread1.news.pas.earthlink.net>
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
	<mailman.5281.1174315662.32031.python-list@python.org>
	<1174324902.778062.104610@b75g2000hsg.googlegroups.com>
	<DvJLh.14450$tD2.8463@newsread1.news.pas.earthlink.net>
Message-ID: <1174404479.942013.136150@e1g2000hsg.googlegroups.com>

Thanks Duncan and Dennis.



From supervau at gmail.com  Sat Mar 10 16:17:11 2007
From: supervau at gmail.com (Frank)
Date: 10 Mar 2007 13:17:11 -0800
Subject: How to test if a key in a dictionary exists?
Message-ID: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>

Hi,

does anyone know how one can test if, e.g., a dictionary 'name' has a
key called 'name_key'?

This would be possible:

keys_of_names = names.keys()
L = len(keys_of_names)

for i in range(L):
if keys_of_names[i] == name_key:
print 'found'


But certainly not efficient. I would expect there is something like:

name.is_key(name_key)

I appreciate your help!

Frank



From bearophileHUGS at lycos.com  Tue Mar 27 07:31:41 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 27 Mar 2007 04:31:41 -0700
Subject: plot dendrogram with python
In-Reply-To: <1174987611.314883.150410@y80g2000hsf.googlegroups.com>
References: <1174987611.314883.150410@y80g2000hsf.googlegroups.com>
Message-ID: <1174995101.750777.117860@b75g2000hsg.googlegroups.com>

Frank:
> does anyone know if there is a way to plot a dendrogram with python.
> Pylab or matplotlib do not provide such a function.

An ASCII solution:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/139422

Some graphics:
http://plone.org/products/phylogenetictree
http://www.bioinformatics.org/mavric/

Bye,
bearophile



From dbhbarton at googlemail.com  Fri Mar  9 09:56:46 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 06:56:46 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <55d9ehF24cdi0U1@mid.uni-berlin.de>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
	<1173449933.926669.90810@n33g2000cwc.googlegroups.com>
	<55d9ehF24cdi0U1@mid.uni-berlin.de>
Message-ID: <1173452206.029944.255750@j27g2000cwj.googlegroups.com>

> > I'm sorry I don't follow your logic. Meaningless to the interpreter,
> > yes, meaningless to the IDE or to me, no. I "_can't_ profit from these
> > conveniences"? Why ever not?
>
> Exactly, the ? is meaningless to the language itself, it's only a comment
> sign - ...
> ... it has nothing to do with _python_ the language, so it doesn't
> belong there.

But # is 'only a comment sign' as well, and equally meaningless to the
interpreter. But it's still part of the language, very very useful and
I profit from its existence every day.


> But for python itself, it has no meaning whatsoever, and would just be a
> character to overread, introducing visual clutter.

If you can highlight an entire block with a single character, won't
there be _less_ visual clutter than the current way of achieving the
same effect with # comments?


> So - if you want that feature, patch your editor of choice to deal with that
> comments, make them added and removed with a key stroke, whatever - be my
> guest.

Would if I could!

> Besides, I don't see how "quick highlighting of text" is something that
> needs to be persisted anyway - if it is quick, hightlight it within the
> editor until the file is closed. If not, it might be well worth a comment
> anyway why you think it needs special attention.

What we're talking about here is a form of 'alternate commenting
style'. With the IDE's cooperation it'd work on whole blocks at once,
it would highlight without disrupting the code concerned (at least the
way I'm envisaging it), it would be versatile (could probably be used
for as big a variety of purposes as the # comment), and yes, it'd be
persistent, which is how it would be different from any IDE-based
highlighting.

I think that'd be most useful. You don't. So far nobody else here does
either, and I've not persuaded anybody differently. Fair enough!

dave



From lbates at websafe.com  Wed Mar 14 20:17:12 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 14 Mar 2007 19:17:12 -0500
Subject: Python COM called from VB/Delphi
Message-ID: <3KidnaXVSJHiDWXYnZ2dnUVZ_vGinZ2d@comcast.com>

I have a rather large Python class that I've converted to
a COM object.  I can dispatch (using either Python or VB)
and call the methods perfectly.  Now a new client wants
to call it from Delphi.  Can anyone out there give me
any pointers on how that would be done.  Are there any
"gotchas" about the way arguments or return values
would need to be different for Delphi.  I have NO Delphi
experience so I'm completely lost.

Secondly, I need a callback function in VB (progress
meter) that I can pass to Python COM object to show
progress of https: uploads.  I've tried a bunch of
different things, but am getting nowhere.  Anybody
know how to accomplish this?  I need a class that
has start(), progress(total, count), complete()
methods that is called from my Python COM object.
I got one working in Python by using win32's
win32com.server.util.wrap/unwrap functions but
the VB one has got me stumped.

Thanks in advance for any assistance.

Regards,
Larry


From tjreedy at udel.edu  Wed Mar 21 16:11:45 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 Mar 2007 16:11:45 -0400
Subject: Printing __doc__
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
Message-ID: <ets3i1$sag$1@sea.gmane.org>


"gtb" <goodTweetieBird at hotmail.com> wrote in message 
news:1174506426.108098.243940 at d57g2000hsg.googlegroups.com...
| Greetings,
|
| Don't know the daily limit for dumb questions so I will ask one or
| more.
|
| In a function I can use the statement n =
| sys._getframe().f_code.co_name to get the name of the current
| function. Given that I can get the name how can I print the __doc__
| string? I cant use the following, it will tell me to bugger off as the
| string has no such attribute.
|
| def spam(self):
|    n = sys._getframe().f_code.co_name
|    print n.__doc__      #Wrong
|    print __doc__         #No good either
|    #....

The docstring you are looking for is attached to the *function* object as 
.__doc__ and .func_doc.  Frame.f_code is a *code* object.  It has a 
boilerplate doc string, but not the one you want.  As near as I can tell, 
frames do not keep references to the func object but only the code object, 
which is all it needs to run the code.

I believe tracebacks use co_filename and co_name to find the text of a 
function.  You could try to parse out the doc string from there.

Terry Jan Reedy





From kavithapython at yahoo.co.in  Thu Mar  8 08:10:14 2007
From: kavithapython at yahoo.co.in (kavitha thankaian)
Date: Thu, 8 Mar 2007 13:10:14 +0000 (GMT)
Subject: writing dictionary to file
Message-ID: <527332.20009.qm@web7805.mail.in.yahoo.com>

Hi,
   
  I have  'n' number of dictionaries with the same name but different values
  ( DorC means debit or credit)
   
   
  some={'DorC':'D', 'amount':200,'name':'xxx'}
  some={'DorC':'C', 'amount':200,'name':'xxx'}
  some={'DorC':'D', 'amount':300,'name':'yyy'}
  some={'DorC':'C', 'amount':500,'name':'yyy'}
  some={'DorC':'D', 'amount':700,'name':zzz}
  some={'DorC':'C', 'amount':900,'name':zzz}  and so on,,,
   
  if the credit and debit is not equal for a person, then i would like to open a file and write it in the following format:
   
  name:yyy
  debit:300
  credit:500
   
  name:zzz
  debit:700
  credit:900
   
  can anyone help me???
   
  kavitha

 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
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From franz.steinhaeusler at gmx.at  Thu Mar  1 02:52:43 2007
From: franz.steinhaeusler at gmx.at (Franz Steinhaeusler)
Date: Thu, 01 Mar 2007 08:52:43 +0100
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
Message-ID: <te1du2tptdf5aeeuue4dlo7247br8iq10n@4ax.com>

Hello,

thanks.

pythontidy (with maybe some patches could be useful)

not directly related but:
pyflakes looks quite interesting too.
and I try out (again) pylint and pychecker or a combination
of these could bring good results, I assume. ;)


From laurent.pointal at limsi.fr  Fri Mar 30 03:59:21 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Fri, 30 Mar 2007 09:59:21 +0200
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <euid24$ugc$1@online.de>
References: <euid24$ugc$1@online.de>
Message-ID: <euig08$fv3$2@news2.u-psud.fr>

Max Kubierschky a ?crit :
> Hello,
> 
> I'm planning to give a game programming course for kids of mixed age.
> For this, I am looking for an open source 2D game development kit.
> I am also willing to participate in the development of the development kit.
> 
> Features I'd like to see
> - Possibility to construct simple games via drag and drop without
> programming
> - Integration into an IDE
> - Based on Java or Python
> Pluses:
> - Good Tutorial
> - German documentation

With Python:
* pygame + build your drag'n drop features
* if you like 3D, vpython.


http://www.pygame.org/
http://www.vpython.org/





From sudharani4fun at yahoo.com  Wed Mar  7 03:35:50 2007
From: sudharani4fun at yahoo.com (sudha madhuri)
Date: 7 Mar 2007 00:35:50 -0800
Subject: Videos
	inside(adult-fun-romantic-love-movies-songs)singles-profiles-chating-mails-earn
	money !
Message-ID: <1173256550.541680.176410@8g2000cwh.googlegroups.com>

Videos inside(adult-fun-romantic-love-movies-songs)singles-profiles-
chating-mails-earn money !

http://tinyurl.com/yr28hh

India's largest social network place-Many people with good profiles.
chating-videos-messages-mails-contest-parttime earning-unlimited fun-1
stop for everything

signup and get fun
http://tinyurl.com/yr28hh



From steve at holdenweb.com  Sun Mar 25 18:48:19 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 25 Mar 2007 18:48:19 -0400
Subject: call to function by text variable
In-Reply-To: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <4606FC33.7050906@holdenweb.com>

ianar? wrote:
> yeah the subject doesn't really make sense does it?
> 
> anyway want I want to do is this:
> if n == 1:
> 
>     self.operations.insert(pos, operations.Replace.Panel(self, main))
> 
> elif n == 2:
> 
>     self.operations.insert(pos, operations.ChangeCase.Panel(self,
> main))
> 
> elif n == 3:
> 
>     self.operations.insert(pos, operations.Move.Panel(self, main))
> 
> As you can see all the different functions have the same variables, so
> it would be easier if I could just make a list and use that.
> 
> like this:
> 
> 
> list = ["Replace", "ChangeCase", "Move"]
> textVariable = list[n]
> self.operations.insert(pos, operations.[textVariable].Panel(self,
> main))
> 
> Is something sort of like that possible?
> 
Indeed. You don't need to use textual names (though for that you can 
investigate "getattr()) - the following, naturally, is untested:

ops = [operations.Replace,
        operations.ChangeCase,
        operations.Move
       ]
self.operations.insert(pos, ops[n-1].Panel(self, main)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com


From Leo.Kislov at gmail.com  Tue Mar 27 01:05:45 2007
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 26 Mar 2007 22:05:45 -0700
Subject: shutil.copy Problem
In-Reply-To: <mailman.5648.1174965082.32031.python-list@python.org>
References: <mailman.5648.1174965082.32031.python-list@python.org>
Message-ID: <1174971945.069767.93590@r56g2000hsd.googlegroups.com>

On Mar 26, 8:10 pm, David Nicolson <davidnicols... at hotmail.com> wrote:
> Hi,
>
> I wasn't exactly sure where to send this, I don't know if it is a bug  
> in Python or not. This is rare, but it has occurred a few times and  
> seems to be reproducible for those who experience it.
>
> Examine this code:
>  >>> try:
>  >>>     shutil.copy("/file.xml","/Volumes/External/file.xml")
>  >>> except Exception, err:
>  >>>     print sys.exc_info()[0]
>  >>>     print err
>
> This is the output:
> exceptions.UnicodeDecodeError
> 'ascii' codec can't decode byte 0xd6 in position 26: ordinal not in  
> range(128)]
>
> What could the possible cause of this be?

Show us traceback, without it I doubt anyone can help.

> Shouldn't shutil simply be  
> reading and writing the bytes and not character decoding them?

Yes, shutil.copy copies content verbatim.

  -- Leo



From mwilson at the-wire.com  Sun Mar 18 14:30:04 2007
From: mwilson at the-wire.com (Mel Wilson)
Date: Sun, 18 Mar 2007 14:30:04 -0400
Subject: How to get the previous line in a file?
In-Reply-To: <155468.56172.qm@web58905.mail.re1.yahoo.com>
References: <155468.56172.qm@web58905.mail.re1.yahoo.com>
Message-ID: <etk0jp$5ko$1@sea.gmane.org>

Qilong Ren wrote:
> Hi, Shane,
> 
> Thanks for fast reply.
> 
> What I used is :
>        for line in open(FILE):
>            <do stuff>
> I don't want to store all lines in a list because sometimes the file is very large. We need to store the value of the previous line in a variable. Is that right? 

Almost.  Strictly, we need to bind a name to the object holding the 
previous value, so we can refer to that object later.  :)



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  8 18:49:42 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Fri, 09 Mar 2007 00:49:42 +0100
Subject: Where to "import"?
In-Reply-To: <1173393063.705376@jubilee.claranet.pt>
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
	<1173393063.705376@jubilee.claranet.pt>
Message-ID: <45f09905$0$28886$426a34cc@news.free.fr>

Paulo da Silva a ?crit :
> Bruno Desthuilliers escreveu:
> 
>>Paulo da Silva a ?crit :
> 
> ...
> 
> 
>>>c.py
>>>    class c:
>>
>>        class C(object):
>>
>>1/ better to stick to naming conventions (class names in CamelCase)
> 
> Ok. Thanks.

FWIW:
http://www.python.org/dev/peps/pep-0008/

>>2/ do yourself a favor: use new-style classes
> 
> I still have python 2.4.3 (The gentoo current version).

new-style classes came with Python 2.2.1 IIRC.

> I didn't find this in my tutorial. Would you please enlight me
> a bit about this (class C(object))? 

Inheriting from the builtin class 'object' (or from any other new-style 
class) makes your class a new-style class. new-style classes have much 
more features than old-style ones. Like support for properties (computed 
attributes). old-style classes are still here mainly for compatibility 
with old code. While there not yet officially deprecated, you can 
consider them as such.

> Or just point me out some doc
> to read about.

http://www.python.org/doc/newstyle/

HTH


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 23:27:32 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 01:27:32 -0300
Subject: Where to "import"?
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
	<1173393063.705376@jubilee.claranet.pt>
	<45f09905$0$28886$426a34cc@news.free.fr>
	<1173413376.191416.30990@s48g2000cws.googlegroups.com>
Message-ID: <op.towmn6uwx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 01:09:36 -0300, MonkeeSage <MonkeeSage at gmail.com>  
escribi?:

>> FWIW:http://www.python.org/dev/peps/pep-0008/
>
> By my reading, PEP8 doesn't specify CamelCase as preferred over the
> other styles it mentions. non_camel_case is also considered good
> style, as I understand (and is used all over the standard library).

Class names should be CamelCase. Read it again, and notice the difference  
between a "Descriptive" section and a "Prescriptive" one.

-- 
Gabriel Genellina



From kyosohma at gmail.com  Fri Mar 23 09:20:15 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 06:20:15 -0700
Subject: Need help to learn Python
In-Reply-To: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
References: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
Message-ID: <1174656015.099363.35330@e65g2000hsc.googlegroups.com>

On Mar 23, 12:03 am, "PythonBiter" <tpar... at gmail.com> wrote:
> Hi everyone,
>
> I'm very new in this Group as well Python language. I want to learn
> Python. So could you please advice me, and guide me how can i become
> master in Python !
>
> Thanks,
> Partha

If you need books for a beginner in Python, go with "Python
Programming for the Absolute Beginner" by Dawson, or "Python
Programming: An Introduction to Computer Science" by Zelle.

Core Python Programming is mostly theory and very little code. It's
good for reference and digging deeper into the language, if you don't
mind some screwy grammatical errors here and there. Programming Python
3rd Ed (by Lutz) has lots of code to dig into, but I would say it is
for intermediate to advanced users. It also contains many practical
useful scripts in it.

Mike



From MonkeeSage at gmail.com  Sun Mar 11 00:22:34 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 21:22:34 -0800
Subject: minimum age to learn python (a.k.a graphical vs text languages)
In-Reply-To: <jjJIh.5107$FG1.2494@newssvr27.news.prodigy.net>
References: <mailman.4905.1173540820.32031.python-list@python.org>
	<jjJIh.5107$FG1.2494@newssvr27.news.prodigy.net>
Message-ID: <1173590554.510996.118150@30g2000cwc.googlegroups.com>

" "first person shooter" programming language "

OMG! Thank's freakin awsome, lol!!!



From nagle at animats.com  Wed Mar  7 12:15:16 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 07 Mar 2007 17:15:16 GMT
Subject: Recommended FastCGI module?
In-Reply-To: <slrneut5u3.kpr.jon+usenet@snowy.squish.net>
References: <W6tHh.1644$uo3.758@newssvr14.news.prodigy.net>
	<slrneut5u3.kpr.jon+usenet@snowy.squish.net>
Message-ID: <EqCHh.5535$M65.1150@newssvr21.news.prodigy.net>

Jon Ribbens wrote:
> In article <W6tHh.1644$uo3.758 at newssvr14.news.prodigy.net>, John Nagle wrote:
> 
>>	The "JonPy" version:
>>	http://jonpy.sourceforge.net/fcgi.html
>>	Last revised in 2004.
> 
> 
> I'd recommend my one, but it's just possible I'm not impartial ;-)

    Does it work with current Pythons?  (2.4, 2.5)?  I'm mainly
concerned about the abandonware problem with some of them.

					John Nagle


From mlacunza at gmail.com  Mon Mar 19 09:38:22 2007
From: mlacunza at gmail.com (Mario Lacunza)
Date: Mon, 19 Mar 2007 08:38:22 -0500
Subject: Report options...
Message-ID: <1174311502.5260.2.camel@laptop>


> Hello,
> 
> Right now Im migrating an VB6+Crystal report+Word App to Python+wxPython
> +Reportlab+???
> 
> The VB system work with Word, creating some patterns (title, foot prints,
> etc) and users maybe could insert some new text and Form fields (like parameters) to personalize the
> output, connecting this fields with an recordset retrieve from a DB.
> 
> I dont want to use any external tool for this taks (OpenOffice+pyUno is
> my last chance)
> 
> Any suggestion?
> 
> Thanks!
> 
> Mi configuracion/My config:
> 
> Ubuntu Edgy Eft 6.10
> Linux Kernel 2.6.17-11-386
> Gnome 2.16.1
> Python 2.4.4c1
> wxPython 2.8.1.1 Unicode
> Python IDE: Ulipad 3.6
> Database: Firebird 2.0 Superserver
> 
> -- 
> Saludos / Best regards 
> 
> Mario Lacunza V?squez 
> Desarrollador de Software - Webmaster
> Linux Registered User #439179 
> Desarrollador 2 Estrellas VS2005
> 
> Website        : http://mlacunzav[DOT]cogia[DOT]net 
> Email          : mlacunza[AT]gmail.com / mario_lacunza[AT]yahoo.es
> Blog           : http://mlacunza.blogspot.com
> Lima - Peru




From lojicdotcomNOSPAM at gmail.com  Thu Mar  8 00:12:46 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Thu, 08 Mar 2007 00:12:46 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <1173329966.266070.283130@8g2000cwh.googlegroups.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
Message-ID: <fXMHh.717$R61.393@bignews1.bellsouth.net>

alex23 wrote:
> John Nagle wrote:
>> Hosting providers and distro
>> makers aren't concerned over whether Python works.  They
>> care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
>> Ask them.
> 
> Do you have any real experience with recent linux distros? Or with any
> _real_ hosting providers?
> 
> Because what you've said is clearly not true. Just because the
> situation isn't as easy _for you_ as you would like, doesn't mean that
> Python is being ignored to the extent you're trying to claim.
> 
> -alex23
> 

alex23 - please don't feed the trolls.


From duncan.booth at invalid.invalid  Thu Mar 22 05:58:19 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Mar 2007 09:58:19 GMT
Subject: parsing tables with beautiful soup?
References: <1174499030.042369.312350@n76g2000hsh.googlegroups.com>
	<1174500627.339029.65590@n76g2000hsh.googlegroups.com>
Message-ID: <Xns98FB650A2BE0Fduncanbooth@127.0.0.1>

"cjl" <cjlesh at gmail.com> wrote:

> This works:
> 
> for row in soup.find("table",{"class": "class_name"}):
>      for cell in row:
>           print cell.contents[0]
> 
> Is there a better way to do this?
> 

It may work for the page you are testing against, but it wouldn't work if 
your page contained valid HTML. You are assuming that the TR elements are 
direct children of the TABLE, but HTML requires that the TR elements appear 
inside THEAD, TBODY or TFOOT elements, so if anyone ever corrects the html 
your code will break.

Something like this (untested) ought to work and be reasonably robust:

table = soup.find("table",{"class": "class_name"})
for row in table.findAll("tr"):
	for cell in row.findAll("td"):
		print cell.findAll(text=True)



From kw at codebykevin.com  Fri Mar 30 16:37:29 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 30 Mar 2007 16:37:29 -0400
Subject: Tkinter menu question--how to pass arguments
In-Reply-To: <1175285826.971400.321470@y80g2000hsf.googlegroups.com>
References: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
	<1175285826.971400.321470@y80g2000hsf.googlegroups.com>
Message-ID: <b14ee$460d7509$4275d90a$26830@FUSE.NET>

kyosohma at gmail.com wrote:
> On Mar 30, 2:32 pm, Kevin Walzer <k... at codebykevin.com> wrote:
>> I'm having difficulty structuring a Tkinter menu entry. Here is the
>> command in question:
>>
>> self.finkmenu.add_command(label='Update List of Packages',
>> command=self.authorizeCommand(self.scanPackages))
>>
>> When I start my program, it crashes because it's trying to run the
>> command self.authorizeCommand. The reason I'm structuring it in this
>> fashion is that this command takes another command as an argument--in
>> this case, self.ScanPackages.
>>
>> The basic structure of the program is that the self.authorizeCommand
>> function pops up a dialog box for a password; it then feeds the password
>> to the function that it takes as an argument, i.e. self.scanPackages.
>>
>> I tried setting up the menu entry without the additional parameter, i.e.
>> command=self.authorizeCommand, but then when I try to run the command
>> from the menu, it complains there are not enough arguments.
>> Unsurprising, since self.authorizeCommand takes another function name as
>> an argument.
>>
>> How can I structure the menu item to reflect the correct number of
>> arguments without it trying to execute the command?
>>
>> --
>> Kevin Walzer
>> Code by Kevinhttp://www.codebykevin.com
> 
> There are various ways to accomplish this. The 2 most popular that I
> am aware of are using a helper function or lambda.
> 
> using a lambda:
> 
> command=(lambda:self.authorizeCommand(self.scanPackages))
> 
> 
> using a handler (i.e. indirection layer):
> 
> def func():
>    self.authorizeCommand(self.scanPackages)
> 
> self.finkmenu.add_command(label='Update List of
> Packages',command=func)
> 
> 
> Both of these are talked about in detail in "Programming Python 3rd
> Ed" by Lutz. I found that helpful for me. Of course, I decided to stop
> using Tkinter and switched to wxPython. Hope this gets you going
> though.
> 
> Mike
> 
lambda does the trick--thanks. I have the Lutz book but overlooked that 
part.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From skip at pobox.com  Fri Mar 23 07:32:05 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 23 Mar 2007 06:32:05 -0500
Subject: "finally" for unit test
In-Reply-To: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
Message-ID: <17923.47797.932315.33614@montanaro.dyndns.org>

    gabriel> Is there something like a finally for unittest functions?

TestCase instances have setUp() and tearDown() methods:

    http://docs.python.org/dev/lib/testcase-objects.html

Skip


From eight02645999 at yahoo.com  Tue Mar 20 00:49:13 2007
From: eight02645999 at yahoo.com (eight02645999 at yahoo.com)
Date: 19 Mar 2007 21:49:13 -0700
Subject: an enumerate question
In-Reply-To: <sLmdnYMmZYbV02LYnZ2dnUVZ_tyinZ2d@comcast.com>
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
	<7xr6rkr8gw.fsf@ruckus.brouhaha.com>
	<1174356075.710324.321150@b75g2000hsg.googlegroups.com>
	<sLmdnYMmZYbV02LYnZ2dnUVZ_tyinZ2d@comcast.com>
Message-ID: <1174366153.314933.327200@y80g2000hsf.googlegroups.com>

On Mar 20, 11:00 am, Steven Bethard <steven.beth... at gmail.com> wrote:
> eight02645... at yahoo.com wrote:
> > for n,l in enumerate(open("file")):
> >    print n,l # this prints current line
> >    print next line in this current iteration of the loop.
>
> Depends what you want to happen when you request "next".  If you want to
> renumber the lines, you can call .next() on the iterator::
>
>      >>> open('temp.txt', 'w').write('1\n2\n3\n4\n5\n6\n7\n')
>      >>> lines_iter = open('temp.txt')
>      >>> for i, line in enumerate(lines_iter):
>      ...     print 'LINE %i, %r %r' % (i, line, lines_iter.next())
>      ...
>      LINE 0, '1\n' '2\n'
>      LINE 1, '3\n' '4\n'
>      LINE 2, '5\n' '6\n'
>      Traceback (most recent call last):
>        File "<interactive input>", line 2, in <module>
>      StopIteration
>
> If you want to peek ahead without removing the line from the iterator,
> check out this recipe::
>
>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/304373
>
> Which allows code like::
>
>      >>> lines_iter = peekable(open('temp.txt'))
>      >>> for i, line in enumerate(lines_iter):
>      ...     print 'LINE %i, %r %r' % (i, line, lines_iter.peek())
>      ...
>      LINE 0, '1\n' '2\n'
>      LINE 1, '2\n' '3\n'
>      LINE 2, '3\n' '4\n'
>      LINE 3, '4\n' '5\n'
>      LINE 4, '5\n' '6\n'
>      LINE 5, '6\n' '7\n'
>      Traceback (most recent call last):
>        ...
>      StopIteration
>
> (Note that the recipe doesn't try to catch the StopIteration, but if you
> want that suppressed, it should be a pretty simple change.)
>
> STeVe

thanks,  lines_iter.next() is what i need at the moment.



From marco at waven.com  Mon Mar 26 21:58:29 2007
From: marco at waven.com (Marco)
Date: Tue, 27 Mar 2007 09:58:29 +0800
Subject: about second parameter of signal handler func.
Message-ID: <5c62a320703261858k79352a38o63b1627c913e529d@mail.gmail.com>

Hi,

In C, a signal handler function has only one parameter, that is signal number.
But in Python(import signal), a signal handler function has two
parameters, the first is signal number, the second is "frame"?

What is "frame", please?

Thank you!


-- 
LinuX Power


From steve at holdenweb.com  Wed Mar 14 12:45:07 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 12:45:07 -0400
Subject: most complete xml package for Python?
In-Reply-To: <1173887937.251026.175260@y66g2000hsf.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
Message-ID: <et98t9$9fe$1@sea.gmane.org>

Paul Boddie wrote:
> On 14 Mar, 16:15, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
>> metaperl wrote:
>>> Without even checking them all out, I'm thinking the Amara XML Toolkit
>>> must be the most feature-packed.
>> Please check out lxml before you post FUD like this.
>>
>> http://codespeak.net/lxml/
> 
> Calm down, Stefan! The inquirer must have got the impression of
> Amara's superiority from somewhere; all you need to do is to discover
> which resource gave that impression and balance the situation out. In
> any case, it's an opinion: there's no fear involved, and the only
> uncertainty and doubt are in the inquirer's mind, which I suppose is
> why they posted the inquiry.
> 
Although the phrase "without even checking them all out" hardly lends 
credence to the OP's assertion of Amara's superiority, and does tend to 
support a hypothesis involving some ulterior motive (or would if less 
ingenuously done).

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From nick at craig-wood.com  Thu Mar 29 07:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Thu, 29 Mar 2007 06:30:04 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<mailman.5697.1175060331.32031.python-list@python.org>
	<slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
	<mailman.5746.1175160012.32031.python-list@python.org>
Message-ID: <slrnf0n5b4.qr8.nick@irishsea.home.craig-wood.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>   "Nick Craig-Wood" <nick at crai....od.com> wrote:
> 
> > Well, yes there are different levels of potential reliability with
> > different implementation strategies for each!
> 
>  Gadzooks!  Foiled again by the horses for courses argument.
> 
>  ; - )

;-)

I'd like there to be something which works well enough for day to day
use.  Ie doesn't ever wreck the internals of python.  It could have
some caveats like "may not timeout during C functions which haven't
released the GIL" and that would still make it very useable.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jjl at pobox.com  Wed Mar 14 16:22:47 2007
From: jjl at pobox.com (John J. Lee)
Date: Wed, 14 Mar 2007 20:22:47 GMT
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
	<1173581125.663707.5810@s48g2000cws.googlegroups.com>
Message-ID: <87odmvinhf.fsf@pobox.com>

"Graham Dumpleton" <Graham.Dumpleton at gmail.com> writes:
> On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
[...]
> > mod_python relies on an unsupported feature of Python, namely
> > multiple interpreters --> risk of more pain with C extensions.
> 
> As usual, those bashing up on mod_python tend not to really know what
> they are talking about. :-(
> 
> Although multiple Python interpreters cannot be manipulated directly
> from within a Python script, they can from the Python C API and it is
> very much a feature of Python and has been for a long time.

I didn't dispute that multiple interpreters are a feature of Python.
I said that they are an unsupported feature -- at least, Martin
v. Loewis says they're "just broken", which is close enough for me:

http://groups.google.co.uk/group/comp.lang.python/browse_thread/thread/1ba97b5e088eb171/674accc133afbc96?rnum=2#674accc133afbc96

"""
In any case, it looks like that the "multiple interpreters" feature of
Python is just broken.
"""

[...]
> Even so, to get such a C extension module working in the context of
> mod_python simply means telling mod_python to run that particular
> application in the first interpreter instance by specifying the
> mod_python directive:
> 
>   PythonInterpreter main_interpreter
[...]

Is it possible to ask mod_python to start separate processes to serve
requests, rather than "separate" interpreters?  We couldn't see a way.


John


From aleax at mac.com  Sun Mar 18 19:34:25 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 16:34:25 -0700
Subject: fifo queue
References: <1174257160.540073.113380@b75g2000hsg.googlegroups.com>
	<7x3b42rwq9.fsf@ruckus.brouhaha.com>
Message-ID: <1hv6jbh.39z9b71mdku7uN%aleax@mac.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> Unless the queue is really large, just use the pop operation to get
> stuff off the top of the queue.  That causes O(n) operations but it
> should be fast if n is small.
> 
>     class queue(list):
>         push = append
>         def pop(self):
>             return list.pop(self,0)
> 
> should do about what you wrote.

If it IS large, then:

import collections
class queue(collections.deque):
  push = collections.deque.append
  pop = collections.deque.popleft

could be even better.


Alex


From steve at REMOVE.THIS.cybersource.com.au  Tue Mar  6 08:04:51 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 07 Mar 2007 00:04:51 +1100
Subject: Good handling of input data (was Re: Newbie question)
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<45EC579A.8090602@websafe.com>
	<mailman.4709.1173178667.32031.python-list@python.org>
Message-ID: <pan.2007.03.06.13.04.50.941412@REMOVE.THIS.cybersource.com.au>

On Tue, 06 Mar 2007 05:57:43 -0500, Tommy Grav wrote:

> So how would you handle this type of error handling?
> My main problem is that occasionally there is an entry
> in the list that is a string:
> 
> 0.9834 134.4933 78.009 run11 27

How do you want to deal with such an occasional string? What do you expect
the code to do?

The way I see it, if you're expecting five floats, and you get four floats
and a string, that's an error. Do you ignore the entire line, or replace
the string with zero, or what?


> Again I would like to avoid having to individually parse the 3 floats,
> while still easily handling the string, but a list comprehension will
> not work as far as I can tell. Is there a module that handles this
> type of flat ascii tables? Something like:
> 
> (x,y,z,id,n) = ParseFile("float","float","float","string","int")
> 
> would be great, and I guess
> 
> (x,y,z,id,n) = PaseFile2("%f %f %f %s %d")
> 
> would be even better.

How about this?

def parse_line(line, types):
    items = line.split()
    return [t(s) for (t, s) in zip(types, items)]


>>> line = "  4.5  6.7    23    -1 fred   7.9  "
>>> parse_line(line, (float, float, int, int, str, float))
[4.5, 6.7000000000000002, 23, -1, 'fred', 7.9000000000000004]



-- 
Steven.



From exarkun at divmod.com  Thu Mar  1 15:08:39 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Thu, 1 Mar 2007 15:08:39 -0500
Subject: GIS Shape file upload to FTP server
In-Reply-To: <14A2A120D369B6469BB154B2D2DC34D206F1EC12@EXCHVS01.ad.sfwmd.gov>
Message-ID: <20070301200839.17852.1570987901.divmod.quotient.1490@ohm>

On Thu, 1 Mar 2007 14:58:11 -0500, "Ahmed, Shakir" <shahmed at sfwmd.gov> wrote:
>HI Group,
>
>As I am very new in python field so this question might be very silly to
>you but if I get any help is highly appreciated.
>
>Problem:
>
>I wrote a python script which is working fine to upload files to the ftp
>server but the problem is it is reducing the actual size after
>transferring. I need to upload a GIS Shape file to the ftp server but
>want to keep the same size and format. Any idea or help is highly
>appreciated.
>
>
> [snip]
>ffile = open('c:/test/wuppnt.shp', 'r')

Perhaps the problem is that you did not open the file in binary mode here?

Jean-Paul


From bill.mill at gmail.com  Wed Mar 14 23:41:54 2007
From: bill.mill at gmail.com (Bill  Mill)
Date: 14 Mar 2007 20:41:54 -0700
Subject: windows blinds
In-Reply-To: <op.to65qlokogvny5@gazeebo>
References: <op.to65qlokogvny5@gazeebo>
Message-ID: <1173930114.349677.268150@y80g2000hsf.googlegroups.com>

On Mar 14, 4:58 pm, lled <l... at blueyonder.co.uk> wrote:
> i am new to python and wanted to know
> could i use it to write a programme so when i double click on a windoz
> window it collapses (like in linux)?

You probably could, but you would basically be writing C, because
you're going to need to use the Win32 API.

As for how to use the win32 API, you could try asking on comp.os.ms-
windows.programmer.win32 ( http://groups.google.com/group/comp.os.ms-windows.programmer.win32/topics?lnk=srg
), because that's some fiendish stuff.

-Bill Mill
bill.mill at gmail.com



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 05:36:38 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 11:36:38 +0200
Subject: Python object overhead?
In-Reply-To: <mailman.5530.1174684299.32031.python-list@python.org>
References: <mailman.5530.1174684299.32031.python-list@python.org>
Message-ID: <46079426$0$3272$426a74cc@news.free.fr>

Matt Garman a ?crit :
> I'm trying to use Python to work with large pipe ('|') delimited data
> files.

Looks like a job for the csv module (in the standard lib).

>  The files range in size from 25 MB to 200 MB.
> 
> Since each line corresponds to a record, what I'm trying to do is
> create an object from each record.  However, it seems that doing this
> causes the memory overhead to go up two or three times.
> 
> See the two examples below: running each on the same input file
> results in 3x the memory usage for Example 2.  (Memory usage is
> checked using top.)

Just for the record, *everything* in Python is an object - so the 
problem is not about 'using objects'. Now Of course, a complex object 
might eat up more space than a simple one...

Python has 2 simple types for structured data : tuples (like database 
rows), and dicts (associative arrays). You can use the csv module to 
parse a csv-like format into either tuples or dicts. If you want to save 
memory, tuples may be the best choice.

> This happens for both Python 2.4.3 on Gentoo Linux (64bit) and Python
> 2.3.4 on CentOS 4.4 (64bit).
> 
> Is this "just the way it is" or am I overlooking something obvious?

What are you doing with your records ? Do you *really* need to keep the 
whole list in memory ? Else you can just work line by line:

source = open(sys.argv[1])
for line in source:
   do_something_with(line)
source.close()

This will avoid building a huge in-memory list.

While we're at it, your snippets are definitively unpythonic and 
overcomplicated:


(snip)
> filedata = list()
> file = open(sys.argv[1])
> while True:
>    line = file.readline()
>    if len(line) == 0: break # EOF
>    filedata.append(line)
> file.close()
(snip)

filedata = open(sys.argv[1]).readlines())


> Example 2: read lines into objects:
> # begin readobjects.py
> import sys, time
> class FileRecord:

class FileRecord(object):

>    def __init__(self, line):
>        self.line = line

If this is your real code, I don't see any reason why this should eat up 
3 times more space than the original version.

> records = list()
> file = open(sys.argv[1])
> while True:
>    line = file.readline()
>    if len(line) == 0: break # EOF
>    rec = FileRecord(line)
>    records.append(rec)
> file.close()

records = map(FileRecord, open(sys.argv[1]).readlines()))


From jstroud at mbi.ucla.edu  Wed Mar 21 20:18:57 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Wed, 21 Mar 2007 17:18:57 -0700
Subject: the second of nested buttons using textvariable remains void!
In-Reply-To: <1174522287.135371.26220@o5g2000hsb.googlegroups.com>
References: <1174522287.135371.26220@o5g2000hsb.googlegroups.com>
Message-ID: <etsi1h$58o$1@daisy.noc.ucla.edu>

Samkos wrote:
> Hi there,
> 
> I am fighting with a problem I intended to  believe trivial that
> I could not solve yet!
> 
> I am trying to have a button with a variable text, that
> pops up another button with a variable text when pressed.
> 
> I did that with the following program  in Python, but the
> second button remains always void!!! is it related to
> the textvariable parameters?
> 
> If any of you had a clue, please  don't hesitate!
> 
> in advance, many thanks
> 
> Samuel
> 
> #----------------------- program 2 buttons.py
> --------------------------
> 
> from Tkinter import *
> 
> 
> def go(event):
>     root = Tk()
> 
>     s1=StringVar()
>     s1.set("s1")
>     label1 = Label(root, textvariable=s1)
>     label1.pack(side=LEFT)
> 
>     root.mainloop()
> 
> 
> 
> root = Tk()
> 
> s0=StringVar()
> s0.set("s0")
> label0 = Label(root, textvariable=s0)
> label0.pack(side=LEFT)
> 
> 
> root.bind("<Return>",go)
> 
> root.mainloop()
> 


You have instantiated Tk twice which causes these kind of problems. If 
you want a window in go(), use Toplevel instead of Tk (and "mainloop" is 
not needed in go()). I.e.:


def go(event):
     not_root = Toplevel()

     s1=StringVar()
     s1.set("s1")
     label1 = Label(not_root, textvariable=s1)
     label1.pack(side=LEFT)

James


From john106henry at hotmail.com  Fri Mar  2 01:07:19 2007
From: john106henry at hotmail.com (John Henry)
Date: 1 Mar 2007 22:07:19 -0800
Subject: Matplotlib axes label
In-Reply-To: <1172814815.385543.180040@j27g2000cwj.googlegroups.com>
References: <1172790626.088267.303150@j27g2000cwj.googlegroups.com>
	<1172814815.385543.180040@j27g2000cwj.googlegroups.com>
Message-ID: <1172815638.950663.198040@t69g2000cwt.googlegroups.com>

On Mar 1, 9:53 pm, attn.steven.... at gmail.com wrote:
> On Mar 1, 3:10 pm, "John Henry" <john106he... at hotmail.com> wrote:
>
> > I've been asking this question at the matplotlib user list and never
> > gotten an answer.  I am hoping that there are matplotlib users here
> > that can help.
>
> > My problem with matplotlib's way of handling axes label is illustrated
> > by this example:
>
> >http://www.scipy.org/Cookbook/Matplotlib/MulticoloredLine
>
> > Notice that the y-axis goes from (-1.1, 1.1) but the first label is at
> > -1.0.
>
> (snipped)
>
> > Is there a way to force the label to start at -1.1 instead of -1.0?
>
> > Thanks,
>
> You can try adjusting the labels and ticks
> using matplotlib.ticker.
>
> To the example you cited, one can add
>
> from matplotlib.ticker import MultipleLocator, FormatStrFormatter
>
> # ...
>
> minorLocator = MultipleLocator(0.1)
> minorFormattor = FormatStrFormatter('%0.1f')
> ax.yaxis.set_minor_locator(minorLocator)
> ax.yaxis.set_minor_formatter(minorFormattor)
>
> show()
>
> --
> Hope this helps,
> Steven


Thank you for the response.  Yes, adding those lines did work.

But what exactly is going on here?  Why would adding these two lines
works?

Thanks,



From adamgarstang at googlemail.com  Sun Mar  4 08:45:20 2007
From: adamgarstang at googlemail.com (Adam)
Date: 4 Mar 2007 05:45:20 -0800
Subject: Where I could find older python releases ?
In-Reply-To: <mailman.4645.1173002306.32031.python-list@python.org>
References: <mailman.4645.1173002306.32031.python-list@python.org>
Message-ID: <1173015920.085918.71760@s48g2000cws.googlegroups.com>


Sorry jumped the gun a little there. Is this what you are looking for?
http://codespeak.net/download/py/py-0.9.0.zip



From steve at REMOVE.THIS.cybersource.com.au  Tue Mar  6 16:56:28 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 07 Mar 2007 08:56:28 +1100
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
	<1173206863_18689@sp6iad.superfeed.net>
	<mailman.4728.1173210041.32031.python-list@python.org>
Message-ID: <pan.2007.03.06.21.56.28.713683@REMOVE.THIS.cybersource.com.au>

On Tue, 06 Mar 2007 14:40:37 -0500, Sergio Correia wrote:

> The above suggestions seem nice, but I find this one easier:
[snip]


Thanks to everybody who replied, that's great.


-- 
Steven.



From mike.klaas at gmail.com  Wed Mar 28 00:34:09 2007
From: mike.klaas at gmail.com (Klaas)
Date: 27 Mar 2007 21:34:09 -0700
Subject: with timeout(...):
In-Reply-To: <7xodme724p.fsf@ruckus.brouhaha.com>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<7xodme724p.fsf@ruckus.brouhaha.com>
Message-ID: <1175056449.483895.14760@e65g2000hsc.googlegroups.com>

On Mar 27, 3:28 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> Nick Craig-Wood <n... at craig-wood.com> writes:
> > It could be made to work I'm sure by getting the interpreter to check
> > for timeouts every few hundred bytecodes (like it does for thread
> > switching).
>
> Is there some reason not to use sigalarm for this?

 * doesn't work with threads
 * requires global state/handler
 * cross-platform?

-Mike



From lovelydiab at hotmail.com  Thu Mar 29 10:36:21 2007
From: lovelydiab at hotmail.com (moslim)
Date: 29 Mar 2007 07:36:21 -0700
Subject: Islam, the Religion of Ease
Message-ID: <1175178981.676137.156340@n59g2000hsh.googlegroups.com>

Excuse me!!
Would you stop for a moment?!
O...man...Haven't you thought-one day- about yourself ?
Who has made it?
Have you seen a design which hasn't a designer ?!
Have you seen a wonderful,delicate work without a worker ?!
It's you and the whole universe!..
Who has made them all ?!!
You know who ?.. It's "ALLAH",prise be to him.
Just think for a moment.
How are you going to be after death ?!
Can you believe that this exact system of the universe and all of
these great creation will end in in nothing...just after death!
Have you thought, for a second, How to save your soul from Allah's
punishment?!
Haven't you thought about what is the right religion?!
Read ... and think deeply before you answer..
It is religion of Islam.
It is the religion that Mohammad-peace upon him- the last prophet, had
been sent by.
It is the religion that the right Bible- which is not distorted-has
preached.
Just have a look at The Bible of (Bernaba).
Don't be emstional.
Be rational and judge..
Just look..listen...compare..and then judge and say your word.
We advise you visiting :
http://www.islam-guide.com
http://www.thetruereligion.org
http://www.beconvinced.com
http://www.plaintruth.org
http://english.islamway.com
http://www.todayislam.com
http://www.prophetmuhammed.org
http://www.islamtoday.net/english/
http://www.islamunveiled.org
http://www.islamic-knowledge.com

We willingly recive any inquries at the e-mail :

muslim5 at hotmail.com



From gagsl-py2 at yahoo.com.ar  Sat Mar 10 01:25:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 03:25:18 -0300
Subject: __init__ in subclass of tuple
References: <JtrIh.97$I56.9@trnddc06>
Message-ID: <op.toymsg08x6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 10 Mar 2007 02:36:41 -0300, Alan Isaac <aisaac at american.edu>  
escribi?:

> I am probably confused about immutable types.
> But for now my questions boil down to these two:
>
> - what does ``tuple.__init__`` do?

Nothing. tuple.__init__ does not even exist, as tuples are immutable, they  
are fully initialized with __new__ (the actual constructor)

> - what is the signature of ``tuple.__init__``?

Already said; it does not exist.

> These questions are stimulated by
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/303439
> Looking at that, what fails if I leave out the following line? ::
>
>     tuple.__init__(self)
>
> For exaple, if I try::
>
>     class Test1(tuple):
>         def __init__(self,seq):
>             pass
>
> I seem to get a perfectly usable tuple.
> What initialization is missing?

Nothing!

> Next, the signature question.
> I'm guessing the signature is something like
> tuple.__init__(self, *args, **kwargs)
> with nothing done with anything but self.
> As a trivial illustrative example::
>
>     class Test2(tuple):
>         def __init__(self,seq):
>             tuple.__init__(self, "foo", "bar")
>
> seems to cause no objections.

And does nothing; the tuple is already constructed (try with "print self"  
before the tuple.__init__ call).
(That recipe is a bit old, anyway, I think that tuples *never* have used  
__init__)
Better look for other "named tuples"/"record"/"struct" recipes on the  
CookBook.

The signature is like you said, but it's not a tuple method, it's an  
object method instead:

py> tuple.__init__
<slot wrapper '__init__' of 'object' objects>

The only important thing is that it says: of 'object' objects, not: of  
'tuple' objects. Compare with:

py> tuple.__len__
<slot wrapper '__len__' of 'tuple' objects>

> One last question: where should I have looked
> to answer these questions?

Uhm... Python Language Reference, section 3.4.1
Python/C API Reference Manual, section 10.3, Type objects.
The C source code, object.c
Or asking here :)

-- 
Gabriel Genellina



From MonkeeSage at gmail.com  Thu Mar  8 23:17:48 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Mar 2007 20:17:48 -0800
Subject: Where to "import"?
In-Reply-To: <1173413376.191416.30990@s48g2000cws.googlegroups.com>
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
	<1173393063.705376@jubilee.claranet.pt>
	<45f09905$0$28886$426a34cc@news.free.fr>
	<1173413376.191416.30990@s48g2000cws.googlegroups.com>
Message-ID: <1173413868.239390.45330@s48g2000cws.googlegroups.com>

Disregard my last message, I'm stupid. I totally missed that Bruno was
talking about classname. Bruno is exactly right.



From steve at holdenweb.com  Wed Mar 21 22:05:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 22:05:01 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <1174528562.192439.84480@l77g2000hsb.googlegroups.com>
References: <ets9hc$74f$1@news.onet.pl>	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>	<etscd5$g0g$1@news.onet.pl>	<mailman.5432.1174527485.32031.python-list@python.org>
	<1174528562.192439.84480@l77g2000hsb.googlegroups.com>
Message-ID: <etsobl$7t2$1@sea.gmane.org>

Virgil Dupras wrote:
> On Mar 21, 9:24 pm, Steve Holden <s... at holdenweb.com> wrote:
>> Marcin Ciura wrote:
>>> Steven D'Aprano wrote:
>>>>>>> x, y, z = 1, 2, 3
>>>>>>> x = y = z
>>>>>>> x, y, z
>>>> (3, 3, 3)
>>>> I certainly wouldn't expect to get (2, 3, 3).
>>> Neither would I. I must have expressed myself not clearly enough.
>>> Currently
>>> x = y = z
>>> is roughly equivalent to
>>> x = z
>>> y = z
>>> I propose to change it to
>>> y = z
>>> x = z
>>> Cheers,
>>>    Marcin
>> The difference being ... ?
>> --
>> Steve Holden       +44 150 684 7255  +1 800 494 3119
>> Holden Web LLC/Ltd          http://www.holdenweb.com
>> Skype: holdenweb    http://del.icio.us/steve.holden
>> Recent Ramblings      http://holdenweb.blogspot.com
> 
> I think I see what Marcin means. The 'node' is changed too fast in the
> chain, and next is assigned to 'nextnode' instead of being assigned to
> node.
> 
>>>> class Node:
> ...     pass
> ...
>>>> node = Node()
>>>> nextnode = Node()
>>>> backup_node = node
>>>> node = node.next = nextnode
>>>> node.next is node
> True
>>>> hasattr(backup_node,'next')
> False
> 
So we should take the already well-defined semantics of assignment and 
change them because it seems more obvious to J. Random User? I think I 
might be a little concerned about potential code breakage there.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From aleax at mac.com  Wed Mar 14 10:12:54 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 14 Mar 2007 07:12:54 -0700
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<et1hjq$okj$1@tdi.cu.mi.it> <1hut8e8.g1jy3a1hj5hobN%aleax@mac.com>
	<1173865162.313406.245740@b75g2000hsg.googlegroups.com>
Message-ID: <1huyelp.s2ysob1dom8lfN%aleax@mac.com>

Raymond Hettinger <python at rcn.com> wrote:

> [Alex Martelli]
> >   map([random.randrange(5) for i in xrange(45)].count, xrange(5))
> >
> > i.e., this gives 5 integers (each between 0 and 45 included) summing to
> > 45 -- add 1 to each of them to get the desired result.
> 
> This is a really nice approach.  Besides being fast, it is not too
> hard to see that it is correct.
> 
> FWIW, here's a variant with a count using the new defaultdict:
> 
> n, m = 5, 45
> bag = collections.defaultdict(int)
> for i in xrange(m):
>     bag[random.randrange(n)] += 1
> ans = [bag[k] for k in range(n)]

Neat -- and you can use 1+bag[k] in the LC to adjust the results if
needed, of course.


Alex


From MonkeeSage at gmail.com  Thu Mar  1 11:43:59 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 1 Mar 2007 08:43:59 -0800
Subject: Tuples vs Lists: Semantic difference (was: Extract String From
	Enclosing Tuple)
In-Reply-To: <1172746956.836438.53470@p10g2000cwp.googlegroups.com>
References: <slrneubq5t.1j3.rshepard@salmo.appl-ecosys.com>
	<87slcqvskr.fsf@benfinney.id.au>
	<mailman.4538.1172705434.32031.python-list@python.org>
	<54ms6fF21c6h3U2@mid.individual.net>
	<mailman.4550.1172720725.32031.python-list@python.org>
	<1172727871.032664.165240@j27g2000cwj.googlegroups.com>
	<1172746956.836438.53470@p10g2000cwp.googlegroups.com>
Message-ID: <1172767439.049062.193900@h3g2000cwc.googlegroups.com>

On Mar 1, 5:02 am, bearophileH... at lycos.com wrote:
> I don't know Ruby, but I think it allows such purposes with a freezing
> function.

In ruby all objects can be frozen (freeze is a method on Object, from
which all other objects derive), not just Arrays (Arrays == lists in
python; ruby has no built-in container equiv. to tuple). But that's
more of an implementation detail rather than anthing to do with the
structure/semantics of a certain type of object (e.g., a String can be
frozen, a Hash can be frozen, &c).

Regards,
Jordan



From esj at harvee.org  Sat Mar 24 16:50:47 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Sat, 24 Mar 2007 16:50:47 -0400
Subject: fine grain logging cotrol
In-Reply-To: <GffNh.130835$_73.89420@newsread2.news.pas.earthlink.net>
References: <mailman.5464.1174579174.32031.python-list@python.org>	<etuvoj$pqs$03$1@news.t-online.com>	<etvvij$7h3$01$1@news.t-online.com>	<mailman.5519.1174663861.32031.python-list@python.org>	<eu12qc$1n5$00$1@news.t-online.com>	<eu1kls$og8$1@sea.gmane.org>	<op.tpny4gmex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>	<mailman.5540.1174699389.32031.python-list@python.org>	<_P1Nh.15765$tD2.11562@newsread1.news.pas.earthlink.net>	<mailman.5551.1174750211.32031.python-list@python.org>
	<GffNh.130835$_73.89420@newsread2.news.pas.earthlink.net>
Message-ID: <eu42ve$940$1@sea.gmane.org>

Dennis Lee Bieber wrote:
> On Sat, 24 Mar 2007 11:29:34 -0400, "Eric S. Johansson" <esj at harvee.org>
> declaimed the following in comp.lang.python:
> 
> 
>> yes.  here is the code that fails.  I don't understand why the unbound 
>> method.  what is really weird is that when I singlestep through the 
>> code, it never seems to call filter_test.  it is like the method never 
>> existed.
>>
> 	Among other things -- the init is never called... You have too many
> _ on it. Second, I suspect you needed to overload getLogger -- there is
> no code, that I could see that would /invoke/ a get_logger method.

get_logger does get called as part of the metaclass magic.  I don't 
understand it well enough to explain but a debugger reveals some.  for 
example, stepping through get_logger, I hit the first two statements but 
after executing getLogger, I end up at logger.info.  this leads me to 
believe that __new__ runs at the start of every method invocation (not 
just at object creation).  I obviously need to read more on the topic. 
I am really puzzled that get_logger never makes past getLogger but 
hopefully insight will arrive.




From sgeiger at ncee.net  Wed Mar 14 12:54:55 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Wed, 14 Mar 2007 11:54:55 -0500
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
Message-ID: <45F828DF.1020701@ncee.net>

# Just by looking at the output, it seems pretty obvious that xrange 
would be more memory effcient for large ranges:

print "With range():",range(100,200)
print
print "With xrange():",xrange(100,200)

d = {1:2,2:3,3:4}
d.items()
d.iteritems()

#  I have been curious to use Pysizer (which requires patching Python) 
to demonstrate the difference.



Drew wrote:
> When is it appropriate to use dict.items() vs dict.iteritems. Both
> seem to work for something like:
>
> for key,val in mydict.items():
>   print key,val
>
> for key,val in mydict.iteritems():
>   print key,val
>
> Also, when is it appropriate to use range() vs xrange(). From my
> understanding, xrange() essentially gives you an iterator across a
> range, so it should be used when iterating. Should you only use
> range() when want to physically store the range as a list?
>
> Thanks,
> Drew
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From jura.grozni at gmail.com  Thu Mar  1 08:15:41 2007
From: jura.grozni at gmail.com (azrael)
Date: 1 Mar 2007 05:15:41 -0800
Subject: pattern matching
Message-ID: <1172754941.682697.122580@v33g2000cwv.googlegroups.com>

can someone give me good links for pattern matching in images using
python



From researchbase at gmail.com  Tue Mar 13 03:15:55 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Tue, 13 Mar 2007 12:45:55 +0530
Subject: help developing an editor to view openoffice files.
Message-ID: <f81479dd0703130015r6b91ebf2xa631e914e1c66990@mail.gmail.com>

hello,
right now I am involved on doing a very important accessibility work.
as many people may or may not know that I am a visually handicap
person and work a lot on accessibility.  the main issue at hand is to
create an accessible editor for open office.
there are a lot of things remaining on that front.
so right now I am trying to find out a temporary work around by
creating a simple accessible editor (with wxpython) for viewing and
editing open office files.
I know there must be python libraries that can open/ save .odt files
because it is an open standard any ways.
but I am trying to work out a kind of a program where those files can
also be displayed in a text area with all the formatting.
probably one way of doing it is to use some thing like a rich text
editor and allow the file to be converted to rtf from odt for viewing
and back again to odt when the user wishes to save it.
another way I find is to actually find out if there is a odt text box
that can display these files as they are.
viewing the contents of the files in an editable way is most important.
any suggestions?
regards.
Krishnakant.


From spamtrap at dot-app.org  Fri Mar 23 18:30:05 2007
From: spamtrap at dot-app.org (Sherm Pendley)
Date: Fri, 23 Mar 2007 18:30:05 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnfxDTKdi5J_bnZ2dnUVZ_uzinZ2d@comcast.com>
	<m2slbxbg57.fsf@local.wv-www.com>
	<Na-dnQjjNblIU57bnZ2dnUVZ_vKunZ2d@comcast.com>
Message-ID: <m2lkhna902.fsf@local.wv-www.com>

Lew <lew at nospam.lewscanon.com> writes:

> But if Xah were being trollish, why didn't they jump on my response
> and call me names?

Xah never replies to the threads he starts. At least, I've never known him
to do so.

> I still think that analysis of the original post is a useful exercise
> to learn Java.

Maybe so - I don't know enough Java to comment on that. But there's nothing
useful to cross-posting the original to a fistful of non-Java lists.

> The more subtle Xah or other
> minions of Satan get in their presentations, the more interesting the
> forensic exercise to dig out the truth.

The truth is that Xah wants to start an argument. He cross-posts for that
reason, so that the "forensic exercise" you're speaking of then becomes an
argument among proponents of the various languages about which language is
closer to the "truth".

Don't take my word for it though - check Google Groups. You'll find he's
been doing this for a long time.

sherm--

-- 
Web Hosting by West Virginians, for West Virginians: http://wv-www.net
Cocoa programming in Perl: http://camelbones.sourceforge.net


From gandalf at designaproduct.biz  Mon Mar 12 16:02:35 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Mon, 12 Mar 2007 21:02:35 +0100
Subject: Find the path of a running .py program
Message-ID: <45F5B1DB.1030105@designaproduct.biz>


  Hi All!

There was a thread here, more than a month ago. It was about finding the 
path of a .py file. I suggested os.abspath(__file__). Others told that 
sys.argv[0] is better. I was not sure why I did not like that solution. 
Now I ran into the problem again, and I now I remember what is the 
problem with that. For windows service applications, it does not work. 
The running program will be pythonservice.exe. Usually we want to know 
where the python program (.py sources) are. So, if you ever write a 
windows service in Python, make sure that you os.chdir to the correct 
directory before you do anything else.

Original thread:

http://groups.google.com/group/comp.lang.python/browse_thread/thread/d1a674a2d42741ee/9763b5a8ab48b0a0?lnk=st&q=python+__file__+gandalf+argv&rnum=2&hl=hu#9763b5a8ab48b0a0

Here is a snippet that helped me to overcome the problem:

import sys,os
os.chdir(os.path.split(__file__)[0])


keywords: windows, service, startup directory, startup folder, path of a 
.py program

I hope this comment will help others in the future.

Cheers,

   Laszlo



From lobais at gmail.com  Fri Mar  2 18:08:19 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 00:08:19 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<7xlkifh1lw.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.02.23.08.35@gmail.com>

Den Fri, 02 Mar 2007 11:44:27 -0800 skrev Paul Rubin:

> Thomas Dybdahl Ahle <lobais at gmail.com> writes:
>> Do you have any ideas how I can sort these moves the fastest?
> 
> One idea: if you're using alpha-beta pruning, maybe you can use
> something like heapq instead of sorting, since a lot of the time you
> only have to look at the first few moves (ordered best-first).

Do you mean that I add my moves something like this?

from heapq import heappush, heappop
heap = []
for move in genAll():
    heappush(heap, (-getMoveValue (board, table, ply, move), move))

And then use heappop(heap) in the alphabeta loop?
I don't know much of heap queues, but it actually looks very smart.


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 20:03:59 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 22:03:59 -0300
Subject: property syntax
References: <1173346452.096798.215970@t69g2000cwt.googlegroups.com>
	<mailman.4797.1173349253.32031.python-list@python.org>
	<1173351878.314596.252030@30g2000cwc.googlegroups.com>
Message-ID: <op.towc8xxvx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 08:04:38 -0300, <bearophileHUGS at lycos.com> escribi?:

> Gabriel Genellina:
>> You miss this common way, that does not depend on metaclasses,
>> nor base classes, nor custom decorators...
>
> My purpose was to discuss a new syntax. The other stuff is mostly for
> reference, to show that lot of (some) people has tried to find
> alternative solutions to a problem they feel.

Nex syntax has many disadvantages, so you should come with a greater  
analysis of what would be the gain.
Maybe these comments are applicable here:  
http://mail.python.org/pipermail/python-dev/2007-February/071061.html and  
http://mail.python.org/pipermail/python-dev/2007-February/071123.html  
(sorry, a long thread, and two subject lines, that's why I had to post two  
references)
I think this thread belongs to python-ideas instead.

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 21 13:03:58 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 18:03:58 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <46016562$0$27815$426a74cc@news.free.fr>

dmitrey a ?crit :
> Hi all,
> I looked to the PEPs & didn't find a proposition to remove brackets &
> commas for to make Python func call syntax caml- or tcl- like: instead
> of
> result = myfun(param1, myfun2(param5, param8), param3)
> just make possible using
> result =  myfun param1 (myfun2 param5 param8) param3
> 
> it would reduce length of code lines 

Not by a noticeable amount

> and make them more readable,

I guess it's a matter of personal taste, experience with other languages 
and whatnot, but as far a I'm concerned, I find the actual syntax more 
readable - I don't have to think twice to know that it's a function call 
and what are the params.

Also, and FWIW, in Python, the parens are the call operator. Given that 
a function may return another function, how would you handle the 
following case:

result = my_hof(foo, bar)(baaz)

And while where at it, since Python functions are first class objects, 
how would you handle this other case:

def somefunc(arg):
   return 2 * arg

alias = somefunc
# some code here
result = alias(42)

> + no
> needs to write annoing charecters.

Could it be that these 'annoying characters' have a good reason to be 
here ? Strange as it might be, Python has not been built randomly.

> Maybe it will require more work than I suppose,

Probably, yes.

> but anyway I think it worth.

So try to solve the above problems and come back here with an example 
working implementation.

> + it will not yield incompabilities with previous Python versions.

Hmmm. I would not bet my life on this...


From facundo at taniquetil.com.ar  Wed Mar 14 14:01:00 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Wed, 14 Mar 2007 18:01:00 +0000 (UTC)
Subject: Python & Oracle
Message-ID: <et9d8r$vga$1@sea.gmane.org>

Hi! I need to connect to Oracle.

I found this binding,

  http://www.zope.org/Members/matt/dco2

that is the recommended in the Python page.

But that page seems a bit confuse to me. In the upper right corner says
that the last release is PreRelease 1, from 2001-11-15.

At the bottom, however, it says that 1.3 beta was released 2003-02-10,
and is a development version (the last stable is 1.2, from 2002-10-02),
four and a half years ago.

The question is: is this connector the recommended one? it's aged
because it's stable and no more changes are necessary, or it just dead?
Works Ok?

Thank you!! Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/




From johannes.wollard at gmail.com  Tue Mar  6 07:48:43 2007
From: johannes.wollard at gmail.com (Johannes Woolard)
Date: 6 Mar 2007 04:48:43 -0800
Subject: Interface Implementation in Python
In-Reply-To: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
Message-ID: <1173185323.053052.45140@n33g2000cwc.googlegroups.com>

'Lo, I think I know what you're asking:

>  I would like to know the interface concept in Python.How the
> Interface is defined and implemented in Python?.

I assume you're talking about the what Java calls an interface - and
the simple answer is that we don't have an equivalent in Python.
This is because in the Python system of classes, interface inheritance
would be unenforceable (because methods can be arbitrarily added at
runtime).

> How to access the interface fromn Client?

I'm not completely sure what you mean here... client class, client of
some protocol? Assuming you mean the client class, my answer above
should suffice (and if not then I am completely missing the question).

Regards,

Johannes Woolard



From mail at microcorp.co.za  Wed Mar 14 03:35:59 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Wed, 14 Mar 2007 09:35:59 +0200
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au><55fbgjF2492skU1@mid.individual.net><1173573654.009953.266280@30g2000cwc.googlegroups.com><7xbqj01u9c.fsf@ruckus.brouhaha.com>	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com><mailman.5007.1173770416.32031.python-list@python.org>
	<45f75596.0@entanet>
Message-ID: <020701c7660c$b3417280$03000080@hendrik>

"Duncan Smith" <bu...ard at urubu.freeserve.co.uk> wrote:


> Yes, if the generating processes yield numbers from different
> probability mass functions.  You could simply look at the likelihood
> ratio.  Otherwise, the likelihood ratio will be 1.
> 
 I was thinking about the same random number generator being used in the two 
disparate ways.

- Hendrik



From test.07 at gmail.com  Thu Mar  8 22:38:55 2007
From: test.07 at gmail.com (test.07 at gmail.com)
Date: 8 Mar 2007 19:38:55 -0800
Subject: Python threading
In-Reply-To: <mailman.4832.1173406569.32031.python-list@python.org>
References: <1173374702.195390.90550@s48g2000cws.googlegroups.com>
	<mailman.4832.1173406569.32031.python-list@python.org>
Message-ID: <1173411535.336766.39230@q40g2000cwq.googlegroups.com>

On Mar 8, 6:15 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Thu, 08 Mar 2007 14:25:02 -0300, <test... at gmail.com> escribi?:
> All threads share the same memory space, there is not a "per-thread"
> memory allocator, if that's what you are thinking.
> Perhaps you hold a reference to some objects in the Thread object? Or you
> still keep the Thread object itself?

That is what I was thinking. A per-thread memory allocator of some
sort. What I need is run a lot of commands from a COM object that can
be run independently. There commands leak memory, so when the command
finishes, the memory consumption jumps to 800MBs or so. Which begs the
question, if I initialize the COM object in a separate thread and run
the command, does finishing the thread clean up any and all memory the
thread used or not. The output of each thread would actually be a file
on disk, therefore there is no need to pass any data between the
threads and the main program.

> > I did try the pythoncom.CoUnitialize() to release memory, but it
> > doesn't seem to work (it does work about 30-45 seconds after the
> > command is run).
>
> I don't understand what you say here.
> What means "it doesn't seem to work" and "it does work 30 seconds after"?

pythoncom.CoUninitialize(), if I am not mistaken, releases a COM
object (and therefore the memory it uses I assume). When the command
is run (in PythonWin for example), the memory is not released but
persists for quite a while. Using my watch and the Task Manager in
Windows I can see that the memory is released approximately 30 seconds
AFTER I run the pythoncom.CoUninitialize() command is run.

> What memory do you want to release "right away"?

The memory I want to release is the memory the COM object used (the
one initialized with the win32com Dispatch command). The "right-away"
is not much of an issue, but if I can release it before I run each
command from the COM object that leaks memory, it would be nice.
Running upwards to 800MBs of RAM for one 500 line python script seems
a little bit too much for me.

Thank you for your reply Gabriel. If you have any more input, I would
greatly appreciate it.




From jzgoda at o2.usun.pl  Sat Mar 31 06:41:46 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sat, 31 Mar 2007 12:41:46 +0200
Subject: Long way around UnicodeDecodeError, or 'ascii' codec can't decode
	byte
In-Reply-To: <1175314508.766924.38830@d57g2000hsg.googlegroups.com>
References: <1175142370.740773.190400@e65g2000hsc.googlegroups.com>
	<1175172787.832055.223350@n76g2000hsh.googlegroups.com>
	<1175314508.766924.38830@d57g2000hsg.googlegroups.com>
Message-ID: <eule50$7fe$1@nemesis.news.tpi.pl>

Oleg Parashchenko napisa?(a):

>>> I spent two hours fixing it, and I hope it's done. The solution is one
>>> of the ugliest hack I ever written, but it solves the pain. The full
>>> story and the code is in my blog:
>>> http://uucode.com/blog/2007/03/23/shut-up-you-dummy-7-bit-python/
>> Calling sys.setdefaultencoding might not even help in this case, and
>> the consensus is that it may be harmful to your code's portability
>> [1].
> 
> Yes, but I think UTF-8 is now everywhere.

No, it is not. Your own system is "not ready for UTF-8", as you stated
somewhere in this blog entry. How can you expect everybody else's system
being utf-8, while "you are not ready for transition"?

It would be better if you write your programs in encoding-agnostic way,
using byte streams only for input and output (yes, printing a debug
statement on terminal *is* a kind of producing the output). An, oh, you
cann't encode/decode text not knowing the encoding...

-- 
Jarek Zgoda
http://jpa.berlios.de/


From tjreedy at udel.edu  Mon Mar  5 13:32:39 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 5 Mar 2007 13:32:39 -0500
Subject: Help Deciphering Code
References: <3671C2002ECC9149B2B5509290F533A678FA30@fiscex.FISCHERINTERNATIONAL.COM>
Message-ID: <eshno3$2ti$1@sea.gmane.org>


"Bryan Leber" <btl at fischerinternational.com> wrote in message 
news:3671C2002ECC9149B2B5509290F533A678FA30 at fiscex.FISCHERINTERNATIONAL.COM...

I am learning python and I am having to make some changes on an existing
python script. What happens is that one scripts creates an xml document
that looks like this:

<CommitOperation
file="IPM2.1/Identity/IdentityWebApp/Source/com/fisc/prioss/dataservice/
component/profile ProfileUtil.java" message="PATCH_BRANCH: N/A
BUG_NUMBER: N/A FEATURE_AFFECTED: N/A OVERVIEW: Changes for not
including the product configuration account, idmconfig in searches. ""
module="IPM2.1"

The first attribute "file" as you can see shows the path where the file
is and then a space and the actual file name. This is put into a
variable named file. Then in the script, there is a method called that
passes in this variable. The first line in the method called is this:
          reg = re.compile(r'[\\]+[ ]+')
I'm not 100% sure what this is doing, but I believe it is trying to
parse the file variable so that you only get the file name. It is weird
because this had been working just fine until about 2 months ago then it
just started not parsing anything. If anyone can help please help:-)

==================================================
I have no idea what changed, but splitting the file var into its two 
components is trivial:

>>> "IPM2.1/Identity/IdentityWebApp/Source/com/fisc/prioss/dataservice/component/profile 
>>> ProfileUtil.java".split()

['IPM2.1/Identity/IdentityWebApp/Source/com/fisc/prioss/dataservice/component/profile', 
'ProfileUtil.java']

If the ' ' were a '/' instead, then the os.path module has a function for 
splitting off the last component, the file name.

Terry Jan Reedy






From gagsl-py2 at yahoo.com.ar  Thu Mar  8 03:26:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 05:26:22 -0300
Subject: Howto find dict members from a list of keys
References: <esogs0$41a$1@online.de>
Message-ID: <op.tou218p8x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 05:20:20 -0300, Alexander Eisenhuth  
<newsuser at stacom-software.de> escribi?:

> what algo do you use, when you want to find the dict values from d, with  
> members
> of l. Following example:
>
>  >>> d = {1:2,2:3,3:4,4:5,5:6,6:7,7:8,8:9,9:10}
>  >>> l = [7,8]
>  >>> found_dic_members = <yourCode>
>  >>> print found_dict_members
> [8,9]

found_dic_members = [d[key] for key in l]


-- 
Gabriel Genellina



From nagle at animats.com  Fri Mar 30 17:58:46 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 30 Mar 2007 21:58:46 GMT
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <1175290917.509860.224250@o5g2000hsb.googlegroups.com>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
	<mailman.5793.1175281775.32031.python-list@python.org>
	<1175290917.509860.224250@o5g2000hsb.googlegroups.com>
Message-ID: <qKfPh.4100$u03.2759@newssvr21.news.prodigy.net>

Paul McGuire wrote:
> On Mar 30, 2:09 pm, Michael Bentley <mich... at jedimindworks.com> wrote:
> 
>>On Mar 30, 2007, at 10:38 AM, kevinliu23 wrote:
>>
>>
>>
>>
>>
>>
>>>I want to be able to insert a '-' character in front of all numeric
>>>values in a string. I want to insert the '-' character to use in
>>>conjunction with the getopt.getopt() function.

    ' '.join(map(lambda x: '-' + x, s.split()))

assuming that you just want to put a "-" in front of each field,
regardless of its content.

				John Nagle


From paul at boddie.org.uk  Fri Mar  2 15:28:13 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 2 Mar 2007 12:28:13 -0800
Subject: is it bug or feature in xml.dom.minidom?
In-Reply-To: <es9nah$aoh$1@news.lucky.net>
References: <es9nah$aoh$1@news.lucky.net>
Message-ID: <1172867293.638995.324830@31g2000cwt.googlegroups.com>

Maksim Kasimov wrote:
> Hi, i'm faced with such a problem when i use xml.dom.minidom:
>
> to append all child nodes from "doc" in "_requ" to "doc" in "_resp", i do the following:
>
> _requ = minidom.parseString("<resp><doc><one>One</one><two>Two</two></doc></resp>")
> _resp = minidom.parseString("<resp><doc/></resp>")

Note that these are different documents - this is important later on.

> iSourseTag = _requ.getElementsByTagName('doc')[0]
> iTargetTag = _resp.getElementsByTagName('doc')[0]
>
>
> # it prints me that there are two child nodes
> for iChild in iSourseTag.childNodes:
>  print iChild.toxml()

Seems alright.

> # when i walk elements, only first iteration was made
> # and iSourseTag.childNodes now have only one element instead of two
> for iChild in iSourseTag.childNodes:
>  iTargetTag.appendChild(iChild)

But since you're taking a node from one document to add it to another,
you should instead use importNode to make that node importable into
the target document:

for iChild in iSourseTag.childNodes:
    # 1 or True should cause a deep copy
    iNewChild = _resp.importNode(iChild, 1)
    iTargetTag.appendChild(iNewChild)

> # it prints me that there is only one child node
> for iChild in iSourseTag.childNodes:
>  print iChild.toxml()

That's probably because you've "stolen" the node from its document in
order to add it to the target document - something which is possibly
an artifact of the minidom implementation.

> i'm not sure, whether i append child nodes in properly way, but IMHO it looks like a bug.

That minidom does not refuse to let you "move" nodes in this way could
be debated as being a bug or not, but the correct way of copying nodes
is to use importNode.

> My question is how to avoid the "iSourseTag" changes while iterate its nodes?
>
> And, of course, how to append all child nodes to "iTargetTag"?

These questions are hopefully answered above.

Paul



From johnpenk7 at yahoo.com  Mon Mar 26 12:27:57 2007
From: johnpenk7 at yahoo.com (jp)
Date: 26 Mar 2007 09:27:57 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174925855.552135.228190@n59g2000hsh.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
Message-ID: <1174926477.816452.208900@y80g2000hsf.googlegroups.com>

On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
> On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> > I skip over these widgets when using the tab key?
>
> > Thank you,
> > John
>
> I would probably write some custom event handling. Something that
> could tell it was a key-press event and not just an on-focus event.
> Then it would be a simple, if key-press == tab, put focus on next
> widget of interest. Something like that should work.
>
> Mike


Isn't there just a simple configuration option to disable the tab
key?  Like the takfocus option with Tkinter widgets?



From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 30 09:01:43 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Fri, 30 Mar 2007 23:01:43 +1000
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
	<mailman.5767.1175190942.32031.python-list@python.org>
Message-ID: <pan.2007.03.30.13.01.42.679715@REMOVE.THIS.cybersource.com.au>

On Thu, 29 Mar 2007 14:55:04 -0300, Gabriel Genellina wrote:

> En Thu, 29 Mar 2007 01:56:15 -0300, Steven D'Aprano  
> <steve at REMOVE.THIS.cybersource.com.au> escribi?:
> 
>> By the way, "id(obj) == id(another_object)" is just a long way of writing
>> "obj is another_object".
> 
> Just as a side note: that's not true, testing by id() only works if both  
> objects are alive at the same time.

Correction noted.


> py> id(object()) == id(object())
> True
> py> object() is object()
> False

That's weird. How on earth does that happen?


> So using the `is` operator is the only safe way to test for identity.

But if an object can be garbage collected before the is operator does the
comparison, how can that be safe?


-- 
Steven.



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 19:32:48 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 11:32:48 +1100
Subject: Problem with returning prime number in a simple calculation
	program
References: <1172964996.193310.251650@j27g2000cwj.googlegroups.com>
Message-ID: <pan.2007.03.04.00.32.47.752787@REMOVE.THIS.cybersource.com.au>

On Sat, 03 Mar 2007 15:36:36 -0800, QHorizon wrote:

> Hello, I'm new to Python (I've learned everything up to iterators so
> far) and fairly new to Programming.  This would be my first real
> program:
> 
> #Coordinate Geometry (The whole program is not shown)
> 
> import math
> import sys
> 
> print "Welcome to the Coordinate Geometry Calculator!"
> print "Type 'terms' for a list of commands"
> 
> def main():

[snip big boring series of if...elif... statements]

You're eventually going to run into a run time recursion error if you run
that for long enough. Can you see why?

A better way to do a command loop is something like this:


def bad_command():
    # called when the user enters an unrecognized command
    print "Unknown command, please try again"

class QuitException(Exception):
    # used for exiting the loop
    pass


def main():
    # Make a "dispatch table" that maps the name of a command 
    # (as typed by the user) with a function to call.
    dispatcher = {'slope': do_slope,
                  'primes': do_primes,
                  'quit': do_quit,
                  # ... and more here
                 }
    try:
        # loop forever (until we jump out of it)
        while True:
            cmd = get_command_from_user()
            # you have to write get_command_from_user yourself
            func = dispatcher.get(cmd, bad_command)
            result = func()
            print result
    except QuitException:
        print "Goodbye, come again soon!"


Now you just need to define your individual functions do_slope, do_primes,
etc. The only "special" one is do_quit.

def do_quit():
    raise QuitException


Now let's look at the do_primes function. (You call it "prime".)

> def prime():
> 	num = input("Number ")

That's a good way to have malicious users do really, really really bad
things to your PC.

Safer is to do this:

num = int(raw_input("Number "))

> 	i = num - 1
> 	divcounter = 0
> 	while i > 1:
> 		if num % i != 0:
> 			divcounter += 1
> 			i -= 1

That's an inefficient algorithm, if it even works. I'm not sure that it
works, and I'm too lazy to find out :)


> 	if divcounter == num - 2:
> 		print num, "is a prime number"
> 	else:
> 		print num, "is not a prime number"

This will only work if divcounter happens to equal the original number
less two. If it equals something else, nothing will be printed.

Here's a simple algorithm to check if a number is prime.

# Warning: untested.
def do_primes():
    num = int(raw_input("Number ")
    if num <= 1:
        return "%n is not prime" % num
    if num == 2:
        return "%n is prime" % num
    elif num % 2 == 0:
        # even numbers other than 2 aren't prime
        return "%n is not prime" % num
    for i in range(3, num, 2):
        if num % i == 0:
            return "%n is not prime" % num
    return "%n is prime" % num


Now, this is deliberately not an efficient algorithm. There are things you
can do to make it more efficient, or you can re-write it completely.
The thing to remember is, don't PRINT the result, RETURN it. Your
do_primes() function should only calculate the result, and pass that
result up to the main loop for printing (or writing to a text file, or
emailing, or whatever).

Have fun!



-- 
Steven.



From aleax at mac.com  Thu Mar 15 23:03:54 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 20:03:54 -0700
Subject: problem with str()
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
	<mailman.5149.1173990948.32031.python-list@python.org>
	<1173992205.985657.167970@y66g2000hsf.googlegroups.com>
	<mailman.5154.1173999970.32031.python-list@python.org>
Message-ID: <1hv191c.1bj9j73fp25ldN%aleax@mac.com>

Steve Holden <steve at holdenweb.com> wrote:

> 7stud wrote:
> > Sheesh! You would think that after looking at every inch of the code
> > for way too many hours, at some point that would have poked me in the
> > eye.
> > 
> > Thanks all.
> > 
> Get yourself a stuffed bear, and next time you have this kind of problem
> spend a few minutes explaining to the bear exactly how your program 
> can't possibly be wrong. Works like a charm.

A rubber ducky works much better for that, btw -- more easily washable
than a stuffed bear, for example.


Alex


From michele.simionato at gmail.com  Thu Mar  1 04:23:39 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 1 Mar 2007 01:23:39 -0800
Subject: class declaration shortcut
In-Reply-To: <pan.2007.03.01.08.40.12.770567@gmx.net>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
Message-ID: <1172741018.978417.233160@v33g2000cwv.googlegroups.com>

On Mar 1, 9:40 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <54msaoF21c6h... at mid.individual.net>, Bjoern Schliessmann wrote:
>
> > But what's it (__name__) good for?
>
> As objects don't know to which name they are bound, that's a good way to
> give some information in stack traces or when doing introspection.

Also, the name is used by pickle to find the class of pickled
instances.

 Michele Simionato



From ianare at gmail.com  Sun Mar 25 19:01:50 2007
From: ianare at gmail.com (=?iso-8859-1?B?aWFuYXLp?=)
Date: 25 Mar 2007 16:01:50 -0700
Subject: call to function by text variable
In-Reply-To: <eu6ufc$s0q$1@nemesis.news.tpi.pl>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
	<eu6ufc$s0q$1@nemesis.news.tpi.pl>
Message-ID: <1174863710.576989.235290@o5g2000hsb.googlegroups.com>

Cool now I can run it through the translator.

ops = (_("Directory"), _("Replace"), _("ChangeCase"),
       _("Move"), _("Swap"), _("Insert"), _("ChangeLength"))


self.operations.insert(pos, getattr(operations, ops[n]).Panel(self,
main))

Thanks guys!



From jgodoy at gmail.com  Tue Mar  6 17:41:49 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Tue, 06 Mar 2007 19:41:49 -0300
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
	<mailman.4723.1173201596.32031.python-list@python.org>
	<1173203395.649560.249930@p10g2000cwp.googlegroups.com>
Message-ID: <87d53mataq.fsf@gmail.com>

"Martin Unsal" <martinunsal at gmail.com> writes:

> On Mar 6, 9:19 am, "Chris Mellon" <arka... at gmail.com> wrote:
>> You do? Or do you only have trouble because you don't like using "from
>> foo import Foo" because you need to do more work to reload such an
>> import?
>
> More work, like rewriting __import__ and reload??? :)
>
> There's a point where you should blame the language, not the
> programmer. Are you saying I'm lazy just because I don't want to mess
> with __import__?

I *never* messed with __import__.  And one of my systems has more than 15
packages, with an average of 7 more subpackages plus __init__.py...

Why do you need messing with __import__?

> I was clearly talking about files and you assumed I was talking about
> namespace. That's Pythonic thinking... and I don't mean that in a good
> way!

Hmmm...  Why not?  How are you going to track down where is something, on
which file?  I can make sucessive imports and I can subclass things, so I
might be importing a subclass of a subclass of the class that provides the
method that I want to change.  Having a direct correlation helps me a lot with
big projects.  For small ones I don't care since they are very simple and a
grep usually takes me directly to where I want (just to avoid tools that map
classes to files that are specific to one IDE or editor). 

> Because I have written a project with 50,000 lines of Python and I'm trying
> to organize it in such a way that it'll scale up cleanly by another order of
> magnitude. Because I've worked on projects with millions of lines of code
> and I know about how such things are organized. It's funny, I'm a newbie to
> Python but it seems like I'm one of the only people here thinking about it
> as a large scale development language rather than a scripting language.

I don't se a problem scaling my biggest project with, now, 65K lines of code.
What are the problems you're seeing for yours?  In fact, the Python part of
this code is the easiest to deal with.  And there's ctypes involved here,
which messes things up a bit since I need to keep C + Python in sync.

And if I once imagined I'd write that many LOC and would reach the millions of
LOC of *Python* code then it would certainly make me feel comfortable knowing
that this approach *do* scale.  At least to me and to the ones that work with
me and use the system...  Implementing new features is fast and extremely
modular.  There are modules specific to one client, modules specific to
another, modules shared between all clients, etc.  It isn't a monolithic take
all or nothing.  And even like that it works.

There are customizations on some features that only exists at one client's
branch, there are customizations that might be selected "on the fly" by
choosing something on a preferences screen, etc.

It is a "normal" (but rather complex) application on any aspect that we see
around.  And it scales.  I don't fear changing code.  I don't fear adding new
features.  It "simply works".


-- 
Jorge Godoy      <jgodoy at gmail.com>


From tjreedy at udel.edu  Sun Mar  4 22:46:24 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 4 Mar 2007 22:46:24 -0500
Subject: list-like behaviour of etree.Element
References: <5f56302b0703041248k1d2b3d85g1cf9954eed475c22@mail.gmail.com>
Message-ID: <esg3qc$n25$1@sea.gmane.org>


"Daniel Nogradi" <nogradi at gmail.com> wrote in message 
news:5f56302b0703041248k1d2b3d85g1cf9954eed475c22 at mail.gmail.com...
| The etree.Element (or ElementTree.Element) supports a number of
| list-like methods: append, insert, remove. Any special reason why it
| doesn't support pop and extend (and maybe count)?

I think you should turn the question around: why should such be added?
I imagine that the author wrote the methods he and his users thought 
necessary.
Anything more has various costs.

tjr





From enleverlesX.XmcX at XmclaveauX.com  Wed Mar 14 05:14:51 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Wed, 14 Mar 2007 10:14:51 +0100
Subject: Mocking OpenOffice in python?
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
Message-ID: <45f7be02$0$27406$ba4acef3@news.orange.fr>

Hi!


Under windows, I drive OOo, from Python, via COM/OLE-automation.

It's run OK, but some bugs, in the OOo-COM-Python, had stop my 
devloppements...

However, this way is usable (only on Win, ok?)



@-salutations
-- 
Michel Claveau




From jura.grozni at gmail.com  Fri Mar  9 10:27:15 2007
From: jura.grozni at gmail.com (azrael)
Date: 9 Mar 2007 07:27:15 -0800
Subject: opinion needed
Message-ID: <1173454035.316124.307620@h3g2000cwc.googlegroups.com>

id like to hear your opinion about something.
I just started using Prolog yesterday and i have my doubts about it,
but it seems to me something like object oriented. so i wanted to ask
you how usefull prolog is. Sure this is no prolog newsgroup so my
question is: because it seems object oriented, how important is it by
understanding python and improving my python skills. because i just
started it, i may bee totaly wrong or i missunderstood.

thnx



From gagsl-py2 at yahoo.com.ar  Thu Mar 15 01:38:04 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 05:38:04 +0000 (UTC)
Subject: Circular Class Logic
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
Message-ID: <loom.20070315T062905-841@post.gmane.org>

 <half.italian <at> gmail.com> writes:

> That's not exactly what I'm doing, but your comment still might help.
> I actually want to include an instance of a subclass in it's
> superclass like this:

Move the initialization to another function.

> 
> ===== foo.py =====
> # import Baz
Remove the line above
> 
> class Foo:
> 	# baz = Baz.Baz()
Remove the line above
> 
> 	def __init__(self):
> 		pass
> =====

and add this below:
def initFoo():
  import baz
  Foo.baz = baz.Baz()
initFoo()

No changes in bar.py, baz.py
Instead of initFoo, you could use a custom metaclass. Or a class decorator (if 
and when they become available...)
The code above is an effective way of doing what you want. But I'd think about 
the actual need of doing such things - are you sure it's a good design?

-- 
Gabriel Genellina



From liam_herron at hotmail.com  Wed Mar 21 15:15:04 2007
From: liam_herron at hotmail.com (liam_herron)
Date: 21 Mar 2007 12:15:04 -0700
Subject: Python COM Outlook Question
Message-ID: <1174504504.910510.219050@b75g2000hsg.googlegroups.com>


Say I want to open a shared email inbox (named "DailyGoodEmails") that
is different from my default Outlook inbox, how do I specify this?

Currently, I would do:

s = Dispatch("Outlook.Application")
space = s.GetNameSpace("MAPI")
inbox = space.GetDefaultFolder(6)
myFolder = inbox.Folders[9] #open the folder i want


I have no idea where the "6" comes from but I want to be able to
specify "DailyGoodEmails" somewhere
and be able to iterate over the emails.



From anton.vredegoor at gmail.com  Tue Mar 13 09:59:23 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Tue, 13 Mar 2007 14:59:23 +0100
Subject: number generator
In-Reply-To: <mailman.5016.1173790665.32031.python-list@python.org>
References: <mailman.5016.1173790665.32031.python-list@python.org>
Message-ID: <et6al4$2to$1@news1.zwoll1.ov.home.nl>

Dick Moores wrote:

> If the added constraint is instead that the probability of generating 
> a given list of length N be the same as that of generating any other 
> list of length N, then I believe my function does the job. Of course, 
> [1,46,1,1,1] and [1,1,46,1,1], as Python lists, are distinct. I ran 
> this test for M == 8 and N == 4:

Yes, I believe your function is OK. But the 'fencepost' method posted 
earlier in this thread also does this and it's faster AND it's only two 
line of code ...

> A = []
> B = []
> for x in range(100000):
>      lst = sumRndInt(8,4)
>      if lst not in A:
>          A.append(lst)
>          B.append(1)
>      else:
>          i = A.index(lst)
>          B[i] += 1
> 
> A.sort()

Doesn't sorting break the correspondence between A and B? Also, a more 
pythonic way to count would be to convert the lst into a tuple and then 
do something with a dictionary. Dictionaries have faster lookup. For 
example:

T = tuple(lst)
D[T] = D.get(T,0) + 1

in the loop in order to count the occurrences.

I'm totally fascinated with this stuff myself so it's a bit hard to 
guess whether someone still is interested, but anyway, here are some 
further explorations involving partitions. The code prints the number of 
distinct permutations for each partition.

from operator import mul

def part(m,n,r):
     L = [0]*n
     while m:
         x =  pn(m-1,n-1)
         if r < x:
             L[n-1] += 1
             m -= 1
             n -= 1
         else:
             for i in range(n):
                 L[i] += 1
             r -= x
             m -= n
     return L

def memoize(fn):
     cache = {}
     def proxy(*args):
         try: return cache[args]
         except KeyError: return cache.setdefault(args, fn(*args))
     return proxy

@memoize
def pn(m,n):
     if m<n or n==0:
         return 0
     if m==n or n==1:
         return 1
     return pn(m-1,n-1)+pn(m-n,n)

@memoize
def fac(n):
     if n == 1:
         return 1
     return n*fac(n-1)

@memoize
def ncomb(n,k):
     return reduce(lambda a,b: a*(n-b)/(b+1),range(k),1)

@memoize
def _np(T):
     if T:
         up = fac(sum(T))
         down = reduce(mul,map(fac,T))
         return up/down
     else:
         return 1

def nperm(L):
     f = dict((x,L.count(x)) for x in set(L))
     return _np(tuple(f.values()))

def test():
     m = 50
     n = 5
     np=pn(m,n)
     total = 0
     for r in xrange(np):
         x = part(m,n,r)
         np = nperm(x)
         total += np
         print np,x
     assert total == ncomb(m-1,n-1)

if __name__=='__main__':
     test()

I posted some easy way of generating all outcomes by index -using a 
combinations function- before in this thread. Using just a single 
randint call one could output a random list of numbers adding up to 
something.

But I think it would be possible to do it with distinct permutations of 
these partitions too. I think I did that in old thread. The only problem 
is that in order to look up which distinct permutation of which 
partition is indexed there should be a way to compute a table containing 
info about how many permutations a certain partition contributes to the 
total. But the code would then also need a distinct permutation by index 
function (I've got one but it's not exactly beautiful) while the code is 
becoming very complex even now without the extra lookup table, compared 
to the simple combinations code.

And compared to the two line fencepost method it's just crazy :-)

But I have a hunch there must be a way to generate such a table without 
actually computing any partitions at all and then one could do some kind 
of 3d bisect to look things up. Maybe in a few years, or sooner if 
someone posts an idea that simplifies things.

A.


From jonkersbart at gmail.com  Thu Mar  8 03:45:24 2007
From: jonkersbart at gmail.com (jonkersbart at gmail.com)
Date: 8 Mar 2007 00:45:24 -0800
Subject: splitting common functions into a sepperate module
Message-ID: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>

Dear,

I have wrote a script and want to group some functions of the script
in a separate modulo so that I can import the module in other scripts
and use the same functions there..

The problem is that the common functions need access to some global
variables defined in the script. Python uses different namespaces for
different modules so I can't access the variables of the script in the
module.

What is the best solution to solve this problem?

Thanks in advance,
Bart



From nogradi at gmail.com  Mon Mar  5 04:35:52 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Mon, 5 Mar 2007 10:35:52 +0100
Subject: list-like behaviour of etree.Element
In-Reply-To: <esgm6v$3qi$1@sea.gmane.org>
References: <mailman.4658.1173041314.32031.python-list@python.org>
	<1173080656.077853.249520@8g2000cwh.googlegroups.com>
	<esgm6v$3qi$1@sea.gmane.org>
Message-ID: <5f56302b0703050135x5ae6ec9pbd21ef4abe533bf8@mail.gmail.com>

> >> The etree.Element (or ElementTree.Element) supports a number of
> >> list-like methods: append, insert, remove. Any special reason why it
> >> doesn't support pop and extend (and maybe count)?
> >
> > Those methods would not be hard to add.  Perhaps, submit a feature
> > request to Fredrik Lundh on SourceForge and see what he thinks there
> > is merit in more closely emulating the list API.  Of the methods you
> > listed, the case is probably strongest for extend().
>
> extend() will be in the next release:
>
>     http://effbot.org/zone/elementtree-changes-13.htm
>
> (lxml.etree already has it, btw).
>
> not sure I see the point of pop() and count().  a successful feature request
> would need to include some really compelling use cases.

Great! I also first thought of extend because that would be really
useful, pop and count just came to mind because they exist for lists.
But if extend will be added that'll already make life easier,
pop/count is probably not that much needed.


From andmarti at gmail.com  Mon Mar 19 01:37:32 2007
From: andmarti at gmail.com (andmarti at gmail.com)
Date: Mon, 19 Mar 2007 02:37:32 -0300
Subject: struct.pack returns nothing
In-Reply-To: <1174281765.884607.113420@p15g2000hsd.googlegroups.com>
References: <mailman.5269.1174281334.32031.python-list@python.org>
	<1174281765.884607.113420@p15g2000hsd.googlegroups.com>
Message-ID: <20070319053732.GA8746@lacordilleraandina.com.ar>

On Sun, Mar 18, 2007 at 10:22:45PM -0700, AWasilenko at gmail.com wrote:
> On Mar 19, 1:12 am, andma... at gmail.com wrote:
> > If I build a strict with:
> >
> > import struct
> > print struck.pack ('i', 1)
> >
> > it returns a '\n'.
> > What's wrong with it???
> > :(
> >
> > --
> > Andr?s M.
> > ---------------------------------------------
> 
> Looks like you spelled struct wrong in the code :)

You're right. I meant struct there too. heh.
-- 
Andr?s M.
---------------------------------------------


From duncan.booth at invalid.invalid  Thu Mar 15 11:56:46 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 15 Mar 2007 15:56:46 GMT
Subject: dict.items() vs dict.iteritems and similar questions
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
	<1hv0bc4.4o7cz81m7dokrN%aleax@mac.com>
Message-ID: <Xns98F4A2305FD17duncanbooth@127.0.0.1>

aleax at mac.com (Alex Martelli) wrote:

>> Of course this is a little like the Heisenberg uncertainty principle if
>> the iterator has no __len__ attribute - once you know how long it is you
>> no longer have access to the elements. Or did I miss something?
> 
> Right.  However, "return sum(1 for _ in iterator)" may be a handier way
> to express the same desctructive semantics as the last 4 lines here.

I think I'd prefer the barbaric:

   return len(list(iterator))

since at least it is guaranteed to terminate.


From paul at boddie.org.uk  Fri Mar  2 07:03:03 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 2 Mar 2007 04:03:03 -0800
Subject: Writing an interpreter for language similar to python!!
In-Reply-To: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
References: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
Message-ID: <1172836982.941683.259780@z35g2000cwz.googlegroups.com>

On 28 Feb, 18:38, "luvsat" <luv.... at gmail.com> wrote:
>
> I am new to python and working on a project that involves designing a
> new language. The grammar of the language is very much inspired from
> python as in is supports nearly all the statements and expressions
> that are supported by python. Since my project is in initial stage, so
> I think it would be appropriate if I clarify the following questions:

Sounds interesting!

> 1. Would it make sense if I parse the whole program from scratch and
> then construct the valid python strings back so that they can be
> executed using ''exec'' and ''eval'' commands?

I wouldn't bother parsing the program from scratch - there's a module
called "compiler" in the standard library which will give you an
abstract syntax tree for virtually all of the syntax supported by the
version of Python you're using. Despite complaints about the API, it's
quite easy to work with and will save you from dealing with the
tedious details of actually parsing the source code. If you want to
produce the source code from the AST, some people have written visitor
classes which will probably do what you want.

Paul



From paul at boddie.org.uk  Sun Mar 25 18:20:01 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 25 Mar 2007 15:20:01 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <1174857800.421722.218190@e65g2000hsc.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
	<1174848014.932107.206320@e65g2000hsc.googlegroups.com>
	<eu6k3n$uk6$03$1@news.t-online.com>
	<1174857800.421722.218190@e65g2000hsc.googlegroups.com>
Message-ID: <1174861201.580038.306360@n76g2000hsh.googlegroups.com>

gslm wrote:
> Please, can you read again?
> Yes, I understand that in phyton interpreter, i can't call phyton
> command.Thanks...
>
> But how can i run '.py' files from this command line?I wanted to use
> the phyton command for this.

Once you are in the Python interpreter you can run Python files, but
the best way to run files is one of the following:

 * From the command prompt (DOS prompt); type something like this:

    python file.py

 * In the file manager (Windows Explorer, not Internet Explorer), open/
run file.py.

If you *really* want to run files in the interpreter, you can do
something like this:

    execfile("file.py")

> When i click a py extended file, for example calendar.py in lib
> directory, file opens, then suddenly close,except graphical ones.Why?
> How can i see the results?

For things that don't open windows you really need to run them from
the command prompt.

> And where can i learn which library must i import for whic class?

Look at the library reference: each of the listed libraries are named,
and for the calendar module you'd put this in your program (or type it
at the Python prompt):

    import calendar

Note that in Python programs or at the Python prompt you do not refer
to it as calendar.py or C:\Python24\Lib\calendar.py (or wherever it
lives): Python knows where to look and knows to add the .py on the end
of the file.

Note also that this doesn't run the calendar module, so it isn't quite
the same as running the calendar.py file as described above.

> Sorry, i ask much:(But after learning these starting knowledeges, i
> read tutorials, manuals etc.
> But now i haven't found my answers yet.

I hope this helps a little.

Paul



From steve at holdenweb.com  Sun Mar 25 18:48:19 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 25 Mar 2007 18:48:19 -0400
Subject: call to function by text variable
In-Reply-To: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <4606FC33.7050906@holdenweb.com>

ianar? wrote:
> yeah the subject doesn't really make sense does it?
> 
> anyway want I want to do is this:
> if n == 1:
> 
>     self.operations.insert(pos, operations.Replace.Panel(self, main))
> 
> elif n == 2:
> 
>     self.operations.insert(pos, operations.ChangeCase.Panel(self,
> main))
> 
> elif n == 3:
> 
>     self.operations.insert(pos, operations.Move.Panel(self, main))
> 
> As you can see all the different functions have the same variables, so
> it would be easier if I could just make a list and use that.
> 
> like this:
> 
> 
> list = ["Replace", "ChangeCase", "Move"]
> textVariable = list[n]
> self.operations.insert(pos, operations.[textVariable].Panel(self,
> main))
> 
> Is something sort of like that possible?
> 
Indeed. You don't need to use textual names (though for that you can 
investigate "getattr()) - the following, naturally, is untested:

ops = [operations.Replace,
        operations.ChangeCase,
        operations.Move
       ]
self.operations.insert(pos, ops[n-1].Panel(self, main)

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From deets at nospam.web.de  Sat Mar  3 05:26:08 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 03 Mar 2007 11:26:08 +0100
Subject: Sort with extra variables
In-Reply-To: <pan.2007.03.03.01.34.16@gmail.com>
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54rchkF21jehuU1@mid.uni-berlin.de>
	<pan.2007.03.02.23.12.08@gmail.com>
	<1172877633.676612.141450@31g2000cwt.googlegroups.com>
	<pan.2007.03.02.23.51.54@gmail.com>
	<1172881667.825628.93490@t69g2000cwt.googlegroups.com>
	<pan.2007.03.03.01.34.16@gmail.com>
Message-ID: <54t0qsF22bn49U1@mid.uni-berlin.de>

> Well, you'd have to define the function inside the sortMoves function, as 
> it is where the variables exists.
> 
> def sortMoves(board, table, ply, moves):
>     def sortKey(move):
>         return getMoveValue(board, table, ply, move)
>     moves.sort(key=sortKey, reverse=True) return moves
> 
> Wouldn't that make it create the callable at each call?

Yes, it does. But it's only created _once_ per sortMoves-call, and 
afterwards doesn't affect performance.

And no, it's not slower than you lambda version - they _should_ be 
equally fast, if not it's neglible. And also doesn't affect 
sorting-performance.

Diez


From bgporter at acm.org  Tue Mar 13 11:05:07 2007
From: bgporter at acm.org (Brett g Porter)
Date: Tue, 13 Mar 2007 11:05:07 -0400
Subject: Eureka moments in Python
In-Reply-To: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <45F6BDA3.7080208@acm.org>

Steven D'Aprano wrote:
> I'd be interested in hearing people's stories of Eureka moments in Python,
> moments where you suddenly realise that some task which seemed like it
> would be hard work was easy with Python.

Mine was definitely when I was first working with the xmlrpc module, and 
I was puzzled to no end how it was that I was able to make a call to a 
method of an object when that method didn't exist. All the talk about 
Python being a dynamic language had bounced off of me until that moment, 
when I walked through the __getattr__ method in the debugger and was 
enlightened.

Not surprisingly, that was also the moment when C++ started feeling like 
a straightjacket to me...



From jmazzonelli at gmail.com  Fri Mar 16 10:56:56 2007
From: jmazzonelli at gmail.com (Jorge Mazzonelli)
Date: Fri, 16 Mar 2007 11:56:56 -0300
Subject: Python COM called from VB/Delphi
In-Reply-To: <op.to9fvuacx6zn5v@gabriel2.softlabbsas.com.ar>
References: <3KidnaXVSJHiDWXYnZ2dnUVZ_vGinZ2d@comcast.com>
	<op.to9fvuacx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <138a70320703160756l76c53a19yae4fe04858354bd0@mail.gmail.com>

Larry,

It's been a while since I coded something in VB or Delphi because I'm mostly
turn on Python ;)
so please excuse me any mistakes I can make  8I don't have neither VB or
Delphi installed on this computer)

For Delphi to use an OLE/COM Object it requires a TypeLibrary that explains
how to access to this COM Object. For this you can use Project-->Import
TypeLibrary. This will create automatically a .pas file with all the
declaratons needed so you can use the object from Delphi.
The Object exposed from python is from the point of view of Delphi simply a
COM object. So if you need help on implementing a COM client in Delphi I
suggest you to turn to the Delphi-related groups or do some google search
about it.
I found myself a simple tip about optional parameters and how they are
handle in Delphi, here:
http://blogs.teamb.com/CraigStuntz/archive/2005/07/01/UsingCOMOptionalParamsFromDelphi.aspx

On the VB side, you can see on the link below how to create a callback in VB
(it requires calling to the Windows API)
http://www.thevbzone.com/secrets.htm#AddressOf

But if I understand you well, you need to make the client aware that
something has change (the progress of download for example or the end of the
downloading) I think that the simplest way may be to raise events from you
python code. This way the events are treat naturally in VB. For an example
on how to raise events from you python code, you can look at the sample demo
in win32com/demos/connect.py (implements client and server) or in
win32com/server/connect.py (for server implementation. The demo server
inherits from this one)
Last, Mark Hammond respond while ago about COM Server & Events:
http://mail.python.org/pipermail/python-win32/2004-September/002386.html, I
don't know if there are changes...

Regards,

     Jorge


On 3/15/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
>
> En Wed, 14 Mar 2007 21:17:12 -0300, Larry Bates <lbates at websafe.com>
> escribi?:
>
> > I have a rather large Python class that I've converted to
> > a COM object.  I can dispatch (using either Python or VB)
> > and call the methods perfectly.  Now a new client wants
> > to call it from Delphi.  Can anyone out there give me
> > any pointers on how that would be done.  Are there any
> > "gotchas" about the way arguments or return values
> > would need to be different for Delphi.  I have NO Delphi
> > experience so I'm completely lost.
>
> The same as he would do for any other COM object. There are tools in
> Delphi for building automatically the needed Delphi declarations
> (interfases, classes, methods, constants... similar to what makepy does
> for Python).
> All OLE types work fine. (Variants are a bit hard to process, yes, but it
> can be done)
>
> > Secondly, I need a callback function in VB (progress
> > meter) that I can pass to Python COM object to show
>
> Sorry, I try to stay away of VB as far as possible :)
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From robert.kern at gmail.com  Fri Mar 16 14:26:06 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Fri, 16 Mar 2007 13:26:06 -0500
Subject: distributing python software in jar like fashion
In-Reply-To: <wbzKh.10576$jx3.1929@newssvr25.news.prodigy.net>
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>	<etbv8p$pg9$1@engnntp2.cig.mot.com>
	<wbzKh.10576$jx3.1929@newssvr25.news.prodigy.net>
Message-ID: <eteng3$d8c$1@sea.gmane.org>

John Nagle wrote:
>      Were Python "eggs" a flop, or what?

No.

>      We need to have one packager that everyone agrees on.
> Otherwise, installs become a mess, and then you have to have
> installers that handle multiple packagers.

Eggs and Squisher are complementary tools. Squisher is good for distributing an
application with all of its dependencies in a single file; it is not a packager
or installer for libraries. Eggs are good for distributing libraries and plugins
and their dependencies.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From lojicdotcomNOSPAM at gmail.com  Wed Mar  7 18:30:53 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Wed, 07 Mar 2007 18:30:53 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
Message-ID: <LWHHh.1355$_a1.157@bignews7.bellsouth.net>

John Nagle wrote:
>    Neither Lisp nor Python is an "industrial strength language".
> The infrastructure is too weak.  Hosting providers and distro
> makers aren't concerned over whether Python works.  They
> care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
> Ask them.
> 
>                 John Nagle

In your excitement to post a sweeping and inaccurate generalization (you 
missed diss'ing Ruby), I think you may have missed the point of my post. 
I surely wasn't trying to restart a dead thread, I just thought it was 
funny that there was a similarity to a line from Princess Bride in the 
thread (see relevant part below that you cut out).

If you want to restart a debate, please go back and reply to some 
serious post in the thread - don't hijack mine for your own evil 
purposes and cut out the good parts - did you even see the movie?

George Sakkis wrote:
 > You keep using that phrase. I don't think it means what you think it
 > means.

[Vizzini has just cut the rope The Dread Pirate Roberts is climbing up]
Vizzini: HE DIDN'T FALL? INCONCEIVABLE.
Inigo Montoya: You keep using that word. I do not think it means what 
you think it means.


From nagle at animats.com  Sun Mar  4 01:50:06 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 04 Mar 2007 06:50:06 GMT
Subject: Questions about app design - OOP with python classes
In-Reply-To: <pan.2007.03.03.22.22.48.4257@REMOVE.THIS.cybersource.com.au>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<54q5lnF22aafrU1@mid.uni-berlin.de>
	<pan.2007.03.03.22.22.48.4257@REMOVE.THIS.cybersource.com.au>
Message-ID: <y_tGh.5006$M65.2770@newssvr21.news.prodigy.net>

Steven D'Aprano wrote:
> On Fri, 02 Mar 2007 09:30:20 +0100, Diez B. Roggisch wrote:
> 
> 
>>>A type system doesn't help. So what if they're both floats? The test
>>>is still bogus, your code will still wait too long to engage the
>>>retro-rockets, and the billion dollar space craft will still be travelling
>>>at hundreds of miles an hour when it reaches the surface of Mars.
>>
>>A type system _could_ help. 
> 
> 
> It's easy to wave your hands and say that Microsoft could have done
> something different, but they had to work with what they had, not some
> hypothetical alternative language with a hypothetical type system that
> didn't exist then (if it even exists now).

     The Pascal/Ada/Modula family of languages all had type systems
with restrictions on conversion.  Unlike C, types in Pascal
are not simply abbreviations of the type; they're unique types.

     This turns out to be too restrictive, but it's certainly been
tried.

     There are C++ class libraries that understand units.  And
the conversion factors can be dealt with at compile time, so
the overhead goes away.

				John Nagle


From bbxx789_05ss at yahoo.com  Mon Mar 26 12:15:04 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 26 Mar 2007 09:15:04 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <XcOdnTRJmdpteZvbnZ2dnUVZ_qSrnZ2d@comcast.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
	<1174803233.118069.234290@l75g2000hse.googlegroups.com>
	<1174813227.275145.211000@o5g2000hsb.googlegroups.com>
	<1174854156.298431.68150@n59g2000hsh.googlegroups.com>
	<XcOdnTRJmdpteZvbnZ2dnUVZ_qSrnZ2d@comcast.com>
Message-ID: <1174925704.394888.18170@d57g2000hsg.googlegroups.com>

On Mar 25, 3:09 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Here's another way of looking at it::
>
>      >>> class Test(object):
>      ...     pass
>      ...
>      >>> def greet():
>      ...     print 'Hello'
>      ...
>>> Test.greet = greet
>>> Test.greet
>   <unbound method Test.greet>

Interesting.  After playing around with that example a bit and finally
thinking I understood bound v. unbound, I found what appears to be an
anomaly:
------------
class Test(object):
        pass

def greet(x):
        print "hello"

Test.func = greet
print Test.func

t = Test()
print t.func

def sayBye(x):
        print "bye"

t.bye = sayBye
print t.bye
------------output:
<unbound method Test.greet>
<bound method Test.greet of <__main__.Test object at 0x6dc50>>
<function sayBye at 0x624b0>

Why doesn't t.bye cause a method object to be created?


> ... under the covers, classes are actually using
> doing something like this::
>
>      >>> Test.__dict__['greet'].__get__(None, Test)
>      <unbound method Test.greet>
>      >>> Test.greet == Test.__dict__['greet'].__get__(None, Test)
>      True
>

...via __getattribute_, right?

> ... if you want to get a method from a function, you can always do that
> manually yourself::
>
>      >>> greet.__get__(None, Test)
>      <unbound method Test.greet>

Manually creating a method object.  Nice.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Mar 16 09:37:51 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 16 Mar 2007 14:37:51 +0100
Subject: CSV module and "fileobj"
In-Reply-To: <1174042670.829441.286490@n59g2000hsh.googlegroups.com>
References: <1174042670.829441.286490@n59g2000hsh.googlegroups.com>
Message-ID: <45fa9d7e$0$29896$426a34cc@news.free.fr>

Jon Clements a ?crit :
> Hi Group,
> 
> If I have a CSV reader that's passed to a function, is it possible for
> that function to retrieve a reference to the "fileobj" like object
> that was passed to the reader's __init__? For instance, if it's using
> an actual file object, then depending on the current row, I'd like to
> open the file object again, seek to the current position, then create
> a csv.reader on that, exhaust it until a certain point, then return.
> ie, leaving the passed iterator intact and ready to carry on as
> normal.
> 
> (And yes, I know passing in the source object is probably easier --
> assume a constraint that I can't...)
> 

As Skip pointed out, this won't work that way. There might be a possible 
workaround using itertools.tee and eventually StringIO.

My 2 cents


From dbhbarton at googlemail.com  Fri Mar  9 05:31:14 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 02:31:14 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <mailman.4847.1173435205.32031.python-list@python.org>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
Message-ID: <1173436274.346506.200920@q40g2000cwq.googlegroups.com>

Thanks for the thoughts.

> This could be implemented without new syntax: just make your editor  
> recognize some special comments, and apply the highlighting to the  
> following block. By example,
>
>                 # XXX Remove this when FuruFaifa is fixed to always provide
>                 # XXX the names in the same order
>                 names.sort()
>                 names.reverse()

Yes I recognise that we can use existing comments for this purpose,
and if I was suitably gifted I guess I could try to make the IDE
recognise these 'special comments', and maybe even work out what block
they're meant to apply to. Of course I'll still argue that the WIP
character would be a more elegant, speedy and versatile alternative.


> You accidentally type a ! somewhere, and your module stops working - not  
> so good :( and worse, hard to find.

By my reckoning it would be very very easy to find. Even if the IDE
wasn't greying out everything after it. And how often do you
accidentally mistype a ! at the beginning of a line?


> I sometimes use '''this string marks''' to ignore whole blocks of code. It  
> works fine unless the block already contains the same kind of  
> triple-quoted string...

Indeed. Moreover those quotes have to be in pairs, so it's not exactly
a quick and dandy way of doing what I'd like.


> The main problem with new syntax is breaking compatibility with older  
> versions...

Agreed. But both characters are currently disallowed in the positions
concerned, and in the proposal they're optional extras. This can't
stop old scripts from working, it can only stop new scripts from
working on old installations- just like any new feature.

>, and I doubt it's worth the pain just for highlighting or playing  
> interactively

Ah well there's the issue!

>, so you don't have a great chance of them being  
> implemented...

Obviously I like the idea, but I never hold out much hope that people
will agree with me!



From asandstrom at accesswave.ca  Sat Mar 31 01:20:48 2007
From: asandstrom at accesswave.ca (Arved Sandstrom)
Date: Sat, 31 Mar 2007 05:20:48 GMT
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<Fo2Ph.12350$Um6.9109@newssvr12.news.prodigy.net>
	<460cc83a.2652073@news.readfreenews.net>
Message-ID: <QcmPh.29531$x9.22267@edtnps89>

"Timofei Shatrov" <grue at mail.ru> wrote in message 
news:460cc83a.2652073 at news.readfreenews.net...
> On Fri, 30 Mar 2007 06:48:05 GMT, "Mike Schilling" 
> <mscottschilling at hotmail.com>
> tried to confuse everyone with this message:
>
>>Xah Lee wrote:
>>
>>> So, a simple code like this in normal languages:
>
>>> becomes in Java:
>>
>>Only when written by someone almost entirely ignorant of Java.
>>
>
> Which is the state most people want to be in...

Which based on what I've seen, is the state that most Java programmers are 
in. They'd have no idea why Mike said what he did.

AHS 




From george.sakkis at gmail.com  Sun Mar 18 22:01:27 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Mar 2007 19:01:27 -0700
Subject: list comprehension help
In-Reply-To: <mailman.5246.1174234283.32031.python-list@python.org>
References: <mailman.5246.1174234283.32031.python-list@python.org>
Message-ID: <1174269687.497013.249480@o5g2000hsb.googlegroups.com>

On Mar 18, 12:11 pm, "rkmr... at gmail.com" <rkmr... at gmail.com> wrote:

> Hi
> I need to process a really huge text file (4GB) and this is what i
> need to do. It takes for ever to complete this. I read some where that
> "list comprehension" can fast up things. Can you point out how to do
> it in this case?
> thanks a lot!
>
> f = open('file.txt','r')
> for line in f:
>         db[line.split(' ')[0]] = line.split(' ')[-1]
>         db.sync()

You got several good suggestions; one that has not been mentioned but
makes a big (or even the biggest) difference for large/huge file is
the buffering parameter of open(). Set it to the largest value you can
afford to keep the I/O as low as possible. I'm processing 15-25 GB
files (you see "huge" is really relative ;-)) on 2-4GB RAM boxes and
setting a big buffer (1GB or more) reduces the wall time by 30 to 50%
compared to the default value. BerkeleyDB should have a buffering
option too, make sure you use it and don't synchronize on every line.

Best,
George



From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 00:23:32 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 15:23:32 +1100
Subject: Documentation for "str()" could use some adjustment - Unicode
	issue
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
	<mailman.5276.1174294980.32031.python-list@python.org>
	<DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>
Message-ID: <pan.2007.03.20.04.23.31.729207@REMOVE.THIS.cybersource.com.au>

On Mon, 19 Mar 2007 17:01:23 +0000, John Nagle wrote:

>> Hi John, I'm not at all an expert around here but my understanding of
>> the workflow is that bug reports should be submitted to the tracker at
>> sourceforge. There is no guarantee that they will be noticed there but
>> the chances there are much higher than for a message on the mailing
>> list. I just mention this because I've seen your mysqld, urllib and
>> other potentially important bug reports here with no action taken but
>> maybe submitting them to sourceforge would attract some developers.
> 
>      More people read the mailing list than the bug reports, and
> Google indexes it, so it puts the problem on record.   

"More people" is irrelevant. What matters is "the right people".

I believe Google also indexes bug reports. It depends whether the site
allows Google's spiders or not.


> If this problem
> were reported as a bug, there'd be denial that it was a problem, on
> the grounds that it will be fixed in a future version of Python.

I don't think so much it's denied as that the developers have decided
that fixing it isn't a valuable use of their time because there are more
important (or more interesting) problems that they could be fixing
instead, and it will go away on its own with Python 3.


>      This was addressed in PEP 349 (status "Deferred"), so it's
> a known problem that's being ignored.

Then stop ignoring it, and submit a fix!

If you personally don't have the time or expertise to fix the problem
yourself, pay somebody to do so. Who says Open Source isn't compatible
with capitalism?



-- 
Steven.



From tonyr1988 at gmail.com  Thu Mar 15 13:24:02 2007
From: tonyr1988 at gmail.com (tonyr1988)
Date: 15 Mar 2007 10:24:02 -0700
Subject: Pickle Problem
In-Reply-To: <mailman.5135.1173973120.32031.python-list@python.org>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
	<mailman.5135.1173973120.32031.python-list@python.org>
Message-ID: <1173979442.025584.282090@e65g2000hsc.googlegroups.com>

On Mar 15, 10:38 am, Gary Herron <gher... at islandtraining.com> wrote:
> tonyr1988 wrote:
> > I'm a complete python n00b writing my first program (or attempting to,
> > anyway). I'm trying to make the transition from Java, so if you could
> > help me, it would be greatly appreciated. Here's the code I'm stuck on
> > (It's very basic):
>
> > class DemoClass:
> >    def __init__(self):
> >            self.title = ["Hello", "Goodbye"]
>
> >    def WriteToFile(self, path = "test.txt"):
> >            fw = file(path, "w")
> >            pickle.dump(self.title, fw)
> >            fw.close()
>
> > if __name__=='__main__':
> >    x = DemoClass
> >    x.WriteToFile
>
> > It doesn't do any file I/O at all (that I see). I hope my syntax is
> > alright. If I just call WriteToFile, shouldn't it perform with the
> > default path? It gives me no errors and pretends to execute just fine.
>
> Several people have pointed out the problem, but when you get that
> fixed, I see another bit of trouble.   The pickle format is a binary
> format (be default), but you don't open the file in binary mode.   On
> Unix the distinction is (wisely) irrelevant, but on Windows you should
> open the file with a mode of "wb" not just "w".

Thanks guys for all the help. Sure enough, it was the parenthesis.
Most of my problems seem to be from under-simplifying (using
semicolons, brackets, etc) or, rarely, over-simplifying (forgetting
parenthesis). The biggest thing that was messing me up was the
mandatory "self" input. For some reason I was thinking that, if I had
parenthesis, I would have to define it. Fixing that works perfectly.

Also, about the binary format for opening files. The program that I'm
working on now is completely Linux-based - it's impossible for it to
work on any other OS. Should I still open with "wb" or not? Either
way, thanks for that tip!

One more (completely irrelevant) question. I don't quite understand
the double-underscore functions / methods / etc, such as __name__,
__main__, __init__. Is there a reason for the double-underscore? Does
it make anything special?

Again, thanks for the help...I'm probably going to ask a lot more of
it before too long. :)



From slawomir.nowaczyk.847 at student.lu.se  Fri Mar 16 05:40:36 2007
From: slawomir.nowaczyk.847 at student.lu.se (Slawomir Nowaczyk)
Date: Fri, 16 Mar 2007 10:40:36 +0100
Subject: execfile locks file forever if there are any syntax errors - is
	it python bug?
In-Reply-To: <17911.61901.32043.373777@montanaro.dyndns.org>
References: <20070314130014.A4F9.SLAWOMIR.NOWACZYK.847@student.lu.se>
	<17911.61901.32043.373777@montanaro.dyndns.org>
Message-ID: <20070316103316.A518.SLAWOMIR.NOWACZYK.847@student.lu.se>

On Wed, 14 Mar 2007 07:59:57 -0500
skip at pobox.com wrote:

#> 
#>     Slawomir> When I execfile a file which contains a syntax error, the file
#>     Slawomir> becomes locked and stays this way all the way until I exit the
#>     Slawomir> interpreter (I am unable to delete it, for example). I have
#>     Slawomir> tried but failed to find any way to unlock the file... Is this
#>     Slawomir> a bug in Python?
#> 
#> Kinda seems like it might be.  Please file a bug report on SourceForge.

I did, and it is a bug, but it seems to be already fixed in SVN.

https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1681020&group_id=5470

-- 
 Best wishes,
   Slawomir Nowaczyk
     ( Slawomir.Nowaczyk at cs.lth.se )

Does a clean house indicate that there is a broken computer in it?



From bearophileHUGS at lycos.com  Fri Mar  9 16:59:16 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 9 Mar 2007 13:59:16 -0800
Subject: bisect on a list of lists
In-Reply-To: <1173471342.957772@iceman.esoterica.pt>
References: <1173471342.957772@iceman.esoterica.pt>
Message-ID: <1173477556.637586.320300@p10g2000cwp.googlegroups.com>

Paulo da Silva:
> What is the best way to have something like the bisect_left
> method on a list of lists being the comparision based on an
> specified arbitrary i_th element of each list element?

You may use this recipe of mine that I've just put there for you, but
it's not fully tested yet (if you spot problems I'm willing to fix
them):
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502295

Or you can create a little class, that wraps your list with just a
__cmp__ method that works on the n-th element of the list. Then you
can use heapq on many instances of that class created with a list
comphrension.

Probably there are other solutions too.

Bye,
bearophile



From nieuws.pv at xs4all.nl  Wed Mar 21 19:21:23 2007
From: nieuws.pv at xs4all.nl (Patrick Vrijlandt)
Date: Thu, 22 Mar 2007 00:21:23 +0100
Subject: Python COM Outlook Question
In-Reply-To: <1174504504.910510.219050@b75g2000hsg.googlegroups.com>
Message-ID: <200703212321.l2LNLBgK021123@smtp-vbr13.xs4all.nl>

Hi,

It seems that space.Folders["DailyGoodEmails"] might be a valid expression;
otherwise you might have experiment with
space.GetSharedDefaultFolder()

HTH, Patrick

-----Oorspronkelijk bericht-----

On Mar 21, 2:15 pm, "liam_herron" <liam_her... at hotmail.com> wrote:
> Say I want to open a shared email inbox (named "DailyGoodEmails") that 
> is different from my default Outlook inbox, how do I specify this?
>
> Currently, I would do:
>
> s = Dispatch("Outlook.Application")
> space = s.GetNameSpace("MAPI")
> inbox = space.GetDefaultFolder(6)
> myFolder = inbox.Folders[9] #open the folder i want
>
> I have no idea where the "6" comes from but I want to be able to 
> specify "DailyGoodEmails" somewhere and be able to iterate over the 
> emails.

I don't know how to do this, but I found you a couple websites that should
point you in the right direction:

http://www.boddie.org.uk/python/COM.html
http://webservices.xml.com/pub/a/ws/2003/05/13/email.html

Hope that helps.

Mike

--
http://mail.python.org/mailman/listinfo/python-list




From jmcmonagle at velseis.com.au  Thu Mar  8 19:29:49 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Fri, 09 Mar 2007 10:29:49 +1000
Subject: {Possible_Spam} tkinter text editor
In-Reply-To: <espfgv$6q7$1@ss408.t-com.hr>
References: <espfgv$6q7$1@ss408.t-com.hr>
Message-ID: <45F0AA7D.9080806@velseis.com.au>

Gigs_ wrote:
> I'm writing text editor.
> 
> How to enable/disable (cut, copy etc.) when text is selected/not selected


Bind the Button1-ButtonRelease event to a function which checks the 
length of the SEL tag of the text widget.  If it is zero length, disable 
the appropriate menu entries, if it is non-zero, enable the appropriate 
menu entries.

Simple example:


from Tkinter import *
root = Tk()

textWidget = Text(root)
textWidget.pack()

def onButton1Release(event):
     if len(textWidget.tag_ranges(SEL)) == 0:
         print 'No text selected.  Disable appropriate menu entries'
     else:
         print 'Some text selected.  Enable appropriate menu entries'

textWidget.bind('<Button1-ButtonRelease>', onButton1Release)

root.mainloop()


From kyosohma at gmail.com  Tue Mar 20 11:33:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 08:33:54 -0700
Subject: difference between urllib2.urlopen and firefox view 'page source'?
In-Reply-To: <buednSaHH4EdGGLYRVnzvA@telenor.com>
References: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
	<buednSaHH4EdGGLYRVnzvA@telenor.com>
Message-ID: <1174404834.789749.89760@p15g2000hsd.googlegroups.com>

On Mar 20, 1:56 am, Tina I <tina... at bestemselv.com> wrote:
> cjl wrote:
> > Hi.
>
> > I am trying to screen scrape some stock data from yahoo, so I am
> > trying to use urllib2 to retrieve the html and beautiful soup for the
> > parsing.
>
> > Maybe (most likely) I am doing something wrong, but when I use
> > urllib2.urlopen to fetch a page, and when I view 'page source' of the
> > exact same URL in firefox, I am seeing slight differences in the raw
> > html.
>
> > Do I need to set a browser agent so yahoo thinks urllib2 is firefox?
> > Is yahoo detecting that urllib2 doesn't process javascript, and
> > passing different data?
>
> > -cjl
>
> Unless the data you you need depends on the site detecting a specific
> browser you will probably receive a 'cleaner' code that's more easily
> parsed if you don't set a user agent. Usually the browser optimization
> they do is just eye candy, bells and whistles anyway in order to give
> you a more 'pleasing experience'. I doubt that your program will care
> about that ;)
>
> Tina

You can do this fairly easily. I found a similar program in the book
Core Python Programming. It actually sticks the stocks into an Excel
spreadsheet. The code is below. You can easily modify it to send the
output elsewhere.


# Core Python Chp 23, pg 994
# estock.pyw

from Tkinter import Tk
from time import sleep, ctime
from tkMessageBox import showwarning
from urllib import urlopen
import win32com.client as win32

warn = lambda app: showwarning(app, 'Exit?')
RANGE = range(3, 8)
TICKS = ('AMZN', 'AMD', 'EBAY', 'GOOG', 'MSFT', 'YHOO')
COLS = ('TICKER', 'PRICE', 'CHG', '%AGE')
URL = 'http://quote.yahoo.com/d/quotes.csv?s=%s&f=sl1c1p2'

def excel():
    app = 'Excel'
    xl = win32.gencache.EnsureDispatch('%s.Application' % app)
    ss = xl.Workbooks.Add()
    sh = ss.ActiveSheet
    xl.Visible = True
    sleep(1)

    sh.Cells(1, 1).Value = 'Python-to-%s Stock Quote Demo' % app
    sleep(1)
    sh.Cells(3, 1).Value = 'Prices quoted as of: %s' % ctime()
    sleep(1)
    for i in range(4):
        sh.Cells(5, i+1).Value = COLS[i]
    sleep(1)
    sh.Range(sh.Cells(5, 1), sh.Cells(5, 4)).Font.Bold = True
    sleep(1)
    row = 6

    u = urlopen(URL % ','.join(TICKS))
    for data in u:
        tick, price, chg, per = data.split(',')
        sh.Cells(row, 1).Value = eval(tick)
        sh.Cells(row, 2).Value = ('%.2f' % round(float(price), 2))
        sh.Cells(row, 3).Value = chg
        sh.Cells(row, 4).Value = eval(per.rstrip())
        row += 1
        sleep(1)
    u.close()

    warn(app)
    ss.Close(False)
    xl.Application.Quit()


if __name__ == '__main__':
    Tk().withdraw()
    excel()

# Have fun - Mike



From felipe.lessa at gmail.com  Sat Mar 24 17:07:57 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sat, 24 Mar 2007 18:07:57 -0300
Subject: Python object overhead?
In-Reply-To: <56ja46F28lpp9U1@mid.individual.net>
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
Message-ID: <c2701f5c0703241407o26469543gb7122903319de4aa@mail.gmail.com>

On 3/23/07, Bjoern Schliessmann
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
> (Note that almost everything in Python is an object!)

Could you tell me what in Python isn't an object? Are you counting
old-style classes and instances as "not object"s?

-- 
Felipe.


From lbates at websafe.com  Fri Mar  9 12:52:50 2007
From: lbates at websafe.com (Larry Bates)
Date: Fri, 09 Mar 2007 11:52:50 -0600
Subject: Creat a DLL File from python code, and use that DLL file in other
	Platform (Labview, Java .NET etc)
In-Reply-To: <1173441503.965228.95590@j27g2000cwj.googlegroups.com>
References: <1173441503.965228.95590@j27g2000cwj.googlegroups.com>
Message-ID: <dvidnTiw8eh5A2zYnZ2dnUVZ_qDinZ2d@comcast.com>

macedo.silva at gmail.com wrote:
> Hi,
> 
> I would like to request your attention for this very specific issue:
> 
> I have several classes in Python, and now I want simply re-use it, in
> other language.
> 
> 
> The closest to solution I think I came was with this site:
> http://www.py2exe.org/index.cgi/Py2exeAndCtypesComExeServer?highlight=%28%28Py2exeAndCtypesComDllServer%29%29
> but I not able to solve questions related with TLB files and
> __init__.py files.
> 
> So, could anyone give a tip about HOW TO CREAT a dll file from Python?
> 
> thank in advance
> 
> AMMS
> 
Do you absolutely need .DLL?  You can make a class into a COM object that
nearly every language on the planet can dispatch with ease.  Here is some
info:

http://www.oreilly.com/catalog/pythonwin32/chapter/ch12.html

Calling an existing .DLL?  Use ctypes module.

-Larry


From deets at nospam.web.de  Tue Mar 27 11:16:53 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 Mar 2007 17:16:53 +0200
Subject: Please help!! SAXParseException: not well-formed (invalid token)
References: <1175007585.758109.127490@r56g2000hsd.googlegroups.com>
Message-ID: <56sqr5F29auttU1@mid.uni-berlin.de>

jvictor118 at yahoo.fr wrote:

> I've been using the xml.sax.handler module to do event-driven parsing
> of XML files in this python application I'm working on. However, I
> keep having really pesky invalid token exceptions. Initially, I was
> only getting them on control characters, and a little "sed -e 's/
> [^[:print:]]/ /g' $1;" took care of that just fine. But recently, I've
> been getting these invalid token excpetions with n-tildes (like the n
> in Espa?a), smart/fancy/curly quotes and other seemingly harmless
> characters. Specifying encoding="utf-8" in the xml header hasn't
> helped matters.
> 
> Any ideas? As a last resort, I'd be willing to scrub invalid
> characters.... it just seems strange that curly quotes and n-tildes
> wouldn't be valid XML! Is that really the case?

It's not the case, unless you have a wrong encoding. Then the whole
XML-Document isn't a XML-document at all.

Just putting an encoding header that doesn't match the actually used
encoding won't fix that.

Read up on what encodings are, and ensure your XML-generation respects that.
Then reading these files will cause no problems.

Diez


From arnodel at googlemail.com  Mon Mar  5 14:14:56 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 5 Mar 2007 11:14:56 -0800
Subject: New to Python
In-Reply-To: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
References: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
Message-ID: <1173122096.762869.16920@64g2000cwx.googlegroups.com>

On Mar 5, 6:33 pm, "dnwu... at gmail.com" <dnwu... at gmail.com> wrote:
> I am trying to get a program to add up input from the user to get to
> the number 100 using a loop.  However, I am having some issues.  Here
> is what I have so far.  I know I am just trying to hard, but I am
> stuck.  Thank you for any help.
>
> print "We need to count to 100"
>
> high_number = 100
> total = 0
>
> number = input("Enter your first number ")
> sum = number + total
> while sum < high_number:
>     print "Not there yet..."
>     number = input("Enter another number ")
>
> print "We are there!!!"

There is no need for 'sum' and 'total'. Here's a working version of
your program.  Look at the differences with your attempt.

----------
print "We need to count to 100"

high_number = 100

total = input("Enter your first number ") # first total is the fist
number
while total < high_number:
    print "Not there yet..."
    number = input("Enter another number ")
    total = total + number # Add the new number to the total

print "We are there!!!"
----------

Good luck !

As others have pointed out, 'input' is a function to be careful with.
You could use answer=raw_input(...) and then convert the result to an
int by using number=int(answer).

--
Arnaud



From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 04:57:43 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 18:57:43 +1000
Subject: List comprehension returning subclassed list type?
References: <1174804990.037158.22790@l77g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.25.08.57.41.947276@REMOVE.THIS.cybersource.com.au>

On Sat, 24 Mar 2007 23:43:10 -0700, bullockbefriending bard wrote:

> z_list = [Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y]
> 
> Of course this just gives me a plain list and no access to the
> methodsof z_list.

List comprehensions give you a list. If you want to convert that list into
the type of z_list, you need to do it yourself. Since ZList sub-classes
from list, probably the easiest way is just:

z_list = ZList([some list comprehension here])


> I could, of course go and write a static method in
> ZList which takes a plain list of Z objects and returns a ZList.

Yes, that would be one such way. Another way is:

z_list.extend([some list comprehension here])

If you are using a recent enough version of Python, you probably don't
even need the list comprehension. Just use a generator expression:

z_list.extend(Z(y.var1, y.var2,..) for y in list_of_objects_of_class_Y)

That's especially useful if the list of objects is huge, because it avoids
creating the list twice: once in the list comp, and once as z_list.



-- 
Steven.



From maxerickson at gmail.com  Sat Mar 10 19:44:52 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Sun, 11 Mar 2007 00:44:52 +0000 (UTC)
Subject: PIL: reading bytes from Image
References: <1173568560.648691.61760@64g2000cwx.googlegroups.com>
Message-ID: <Xns98EFC8DF25F5Bmaxericksongmailcom@80.91.229.5>

"cyberco" <cyberco at gmail.com> wrote:

> I'm using web.py to send an image to the client. This works
> (shortened):
> 
> print open(path, "rb").read()
> 
> but this doesn't:
> 
> img = Image.open(path)
> img.thumbnail((10,10))
> print img.getdata()
> 
> or
> 
> print img.load()
> 
> 
> How do I get the bytes of the Image object? 'getdata()' seemed the
> way, but unfortunately...
> 

getdata() returns the data in a PIL format. Saving the image, in a 
format your client understands, to a file like object like 
StringIO.StringIO is an easy path to take.

Sparklines shows this in action:

http://bitworking.org/projects/sparklines/


max



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  2 10:01:52 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 02 Mar 2007 16:01:52 +0100
Subject: class declaration shortcut
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
	<54nlkgF21ft8aU3@mid.individual.net>
	<pan.2007.03.02.02.15.56.940730@REMOVEME.cybersource.com.au>
Message-ID: <54qsj0F21kdccU1@mid.individual.net>

Steven D'Aprano wrote:

> Overkill? Storage of a single attribute holding a (usually short)
> string is overkill?

No, but storing the first name a class is bound to in it is a bit
of, IMHO.
 
> When you do that, you wouldn't expect the __name__ of
> some.module.function to change to f, and it doesn't.

But what is it for then? =) Showing the first name the class was
bound to?
 
Regards,


Bj?rn

-- 
BOFH excuse #217:

The MGs ran out of gas.



From nobody at invalid.com  Tue Mar 27 15:00:22 2007
From: nobody at invalid.com (Erik Johnson)
Date: Tue, 27 Mar 2007 13:00:22 -0600
Subject: Numeric Soup
References: <46094afe$1@nntp.zianet.com>
	<mailman.5676.1175016264.32031.python-list@python.org>
Message-ID: <460969b6$1@nntp.zianet.com>


"Robert Kern" <robert.kern at gmail.com> wrote in message
news:mailman.5676.1175016264.32031.python-list at python.org...

> http://www.scipy.org/History_of_SciPy
>
> numpy is the current array package and supercedes Numeric and numarray.
scipy
> provides a bunch of computational routines (linear algebra, optimization,
> statistics, signal processing, etc.) built on top of numpy.

Thank you.




From bearophileHUGS at lycos.com  Wed Mar  7 17:57:54 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 7 Mar 2007 14:57:54 -0800
Subject: Best place for a function?
In-Reply-To: <558soiF23polgU1@mid.uni-berlin.de>
References: <mailman.4775.1173306427.32031.python-list@python.org>
	<558soiF23polgU1@mid.uni-berlin.de>
Message-ID: <1173308274.223424.14950@h3g2000cwc.googlegroups.com>

Diez B. Roggisch:
> If it really has no other use as in this class, put it as an
> instancemethod in there. Alternatively, you _could_ nest it like this:

Using an instancemethod may be the most formally correct solution for
that problem, but often nested function are the simpler solution. A
downside of nested functions is that you can't give them a doctest (in
a simple way).

Bye,
bearophile



From B.Ogryczak at gmail.com  Mon Mar 26 09:40:55 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 26 Mar 2007 06:40:55 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1174916455.390214.139120@n76g2000hsh.googlegroups.com>

On Mar 26, 3:20 pm, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
> OK...
> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??

Portability, scalability & RAD.





From jg307 at cam.ac.uk  Fri Mar  2 19:27:25 2007
From: jg307 at cam.ac.uk (James Graham)
Date: Sat, 03 Mar 2007 00:27:25 +0000
Subject: How *extract* data from XHTML Transitional web pages? got
	xml.dom.minidom troubles..
In-Reply-To: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
References: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
Message-ID: <e_adnb2cvLhzXXXYnZ2dnUVZ8qqlnZ2d@pipex.net>

seberino at spawar.navy.mil wrote:
> I'm trying to extract some data from an XHTML Transitional web page.
> 
> What is best way to do this?

May I suggest html5lib [1]? It's based on the parsing section of the 
WHATWG "HTML5" spec [2] which is in turn based on the behavior of major 
web browsers so it should parse more or less* any invalid markup you 
throw at it. Despite the name "html5lib" it works with any (X)HTML 
document. By default, you have the option of producing a minidom tree, 
an ElementTree, or a "simpletree" - a lightweight DOM-like 
html5lib-specific tree.

If you are happy to pull from SVN I recommend that version; it has a few 
bug fixes over the 0.2 release as well as improved features including 
better error reporting and detection of encoding from <meta> elements 
(the next release is imminent).

[1] http://code.google.com/p/html5lib/
[2] http://whatwg.org/specs/web-apps/current-work/#parsing

* There might be a problem if e.g. the document uses a character 
encoding that python does not support, otherwise it should parse anything.


From web at pobox.com  Mon Mar 12 14:09:42 2007
From: web at pobox.com (Dr. Who)
Date: 12 Mar 2007 11:09:42 -0700
Subject: File locking
Message-ID: <1173722982.696539.24360@64g2000cwx.googlegroups.com>

I'm always disappointed when I find something that Python doesn't
handle in a platform independent way.  It seems to me that file
locking is in that boat.

1. I don't see a way to atomically open a file for writing if and only
if it doesn't exist without resorting to os.open and specialized
platform O_XXX flags.

2. I don't see a way to atomically open a file for writing and obtain
a lock on the file.

3. I don't see a platform independent way to obtain a lock on a file.
You have to do something goofy like
if sys.platform == win32:
    import msvcrt
else:
    import fcntl
and then similar things to call the correct functions with the correct
flags.

Please let me know if I'm missing something since they seem like
normal file operations that I would hope Python would abstract away.
If not, are there any PEPs concerning this for Python3K?

Thanks,
Jeff



From kyosohma at gmail.com  Tue Mar 27 13:25:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 10:25:09 -0700
Subject: Auto execute python in USB flash disk
In-Reply-To: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
Message-ID: <1175016309.707429.298790@r56g2000hsd.googlegroups.com>

On Mar 27, 11:56 am, "Brian Erhard" <theema... at gmail.com> wrote:
> I am still fairly new to python and wanted to attempt a home made
> password protection program.  There are files that I carry on a USB
> flash drive that I would like to password protect.  Essentially, I
> would like to password protect an entire directory of files.  Is there
> a way to auto execute a python script after a user double clicks to
> open a folder on the USB drive? How can you capture that double click
> event on a specific folder?
>
> Thanks.

I've never done this before, but it sounds cool. You would need to
create some kind of python file object to do this properly. So instead
of actually clicking a folder, you would click a pickled file or
something. I found some cool info about encrypting files here:

http://www.methods.co.nz/python/

There's also a python cryptography kit: http://www.amk.ca/python/writing/pycrypt/

Finally, I found a fellow python programmer that wrote his own:
http://mail.python.org/pipermail/python-list/2006-April/378510.html

There's also PortablePython...

Enjoy!

Mike



From http  Mon Mar 19 22:52:51 2007
From: http (Paul Rubin)
Date: 19 Mar 2007 18:52:51 -0800
Subject: an enumerate question
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
	<7xr6rkr8gw.fsf@ruckus.brouhaha.com>
	<1174356075.710324.321150@b75g2000hsg.googlegroups.com>
Message-ID: <7x1wjkoccc.fsf@ruckus.brouhaha.com>

eight02645999 at yahoo.com writes:
> for n,l in enumerate(open("file")):
>    print n,l # this prints current line
>    print next line in this current iteration of the loop.
> hope you can understand now.

I see.  It just seemed a little weird.  If the file contains
   first line
   second line
   third line

You want the output:

   1 first line
   second line
   2 second line
   third line
   3 third line

Is that right?

Anyway all the ways I can think of to do it are at least somewhat
messy.  Skip suggested one.  It's easier if you're sure the file
is small enough to fit all its lines completely into memory.


From kyosohma at gmail.com  Tue Mar 20 12:25:19 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 09:25:19 -0700
Subject: making objects with individual attributes!
In-Reply-To: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>
References: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>
Message-ID: <1174407919.263659.294430@e1g2000hsg.googlegroups.com>

On Mar 20, 11:08 am, "Alejandro" <altud... at yahoo.com> wrote:
> I have created a class:
>
> class document:
>
>     titre = ''
>     haveWords = set()
>
>     def __init__(self, string):
>
>         self.titre = string
>
> #########
>
> doc1 = document('doc1')
> doc2 = document('doc2')
>
> doc1.haveWords.add(1)
> doc2.haveWords.add(2)
>
> print doc1.haveWords
>
> # i get set([1, 2])
>
> doc1 and doc are sharing attribute haveWords!
> Why ??? there's a way to assign every objetc "document" a different
> "set"

You're just slightly off. The code needs to be more like this:

class document:

	    def __init__(self, string):

	        self.titre = string
	        self.haveWords = set()

##################

I think what you did was create some kind of global variable that was
then accessible through the namespace. But I really don't know for
sure. This code seems to work now, though.

Mike



From bbxx789_05ss at yahoo.com  Fri Mar 30 14:48:46 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 30 Mar 2007 11:48:46 -0700
Subject: manually implementing staticmethod()?
In-Reply-To: <1hvqagu.mn0e7yxfqvmrN%aleax@mac.com>
References: <1175115664.288706.183390@p77g2000hsh.googlegroups.com>
	<1hvqagu.mn0e7yxfqvmrN%aleax@mac.com>
Message-ID: <1175280526.733006.153540@e65g2000hsc.googlegroups.com>

Hi,

Thanks for the responses.


On Mar 28, 4:01 pm, "Michael Spencer" <m... at telcopartners.com> wrote:
> "7stud" <bbxx789_0... at yahoo.com> wrote in message
>
> news:1175115664.288706.183390 at p77g2000hsh.googlegroups.com...> Hi,
>
> > Can someone show me how to manually implement staticmethod()?  Here is
> > my latest attempt:
> > ----------------
>
> Raymond Hettinger can:
>
> http://users.rcn.com/python/download/Descriptor.htm#static-methods-an...

I was using that article to help me.  My problem was I was trying to
implement smeth() as a function rather than a class.  I hacked around
some more, and I came up with the following before peeking at this
thread for the answer:

class smeth(object):
        def __init__(self, func):
                self.func = func

        def __getattribute__(self, name):
                print "smeth -- getattribute"
                return super(smeth, self).__getattribute__(name)

        def __get__(self, inst, cls=None):
                print "smeth get"
                return self.func

class Test(object):
        def __getattribute__(self, name):
                print "Test - gettattribute"
                return super(Test, self).__getattribute__(name)
        def f():
                print "executing f()"
                return 10
        f  = smeth(f)

print Test.f   #displays function obj not unbound method obj!
Test.f()

However, my code does not seem to obey this description in the How-To
Guide to Descriptors:

---------
Alternatively, it is more common for a descriptor to be invoked
automatically upon attribute access. For example, obj.d looks up d in
the dictionary of obj. If d defines the method __get__, then
d.__get__(obj) is invoked according to the precedence rules listed
below.***The details of invocation depend on whether obj is an object
or a class***.
...
For objects, the machinery is in object.__getattribute__ which
transforms b.x into type(b).__dict__['x'].__get__(b, type(b)).
...
For classes, the machinery is in type.__getattribute__ which
transforms B.x into B.__dict__['x'].__get__(None, B).
---------

When I examine the output from my code, Test.f does not call
Test.__getattribute__(), instead it calls smeth.__get__() directly.
Yet that last sentence from the How-To Guide to Descriptors seems to
say that Test.__getattribute__() should be called first.


I'm using python 2.3.5.

On Mar 29, 9:34 am, a... at mac.com (Alex Martelli) wrote:
> Simplest way:
>
> class smethod(object):
>   def __init__(self, f): self.f=f
>   def __call__(self, *a, **k): return self.f(*a, **k)
>
> Alex

Interesting.  That looks like a functor to me.  Thanks.  I notice that
__get__() overrides __call__().





From paul at boddie.org.uk  Fri Mar  2 18:50:59 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 2 Mar 2007 15:50:59 -0800
Subject: How *extract* data from XHTML Transitional web pages? got
	xml.dom.minidom troubles..
In-Reply-To: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
References: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
Message-ID: <1172879459.318432.218250@z35g2000cwz.googlegroups.com>

seberino at spawar.navy.mil wrote:
> I'm trying to extract some data from an XHTML Transitional web page.
>
> What is best way to do this?

An XML parser should be sufficient. However...

> xml.dom.minidom.parseString("text of web page") gives errors about it
> not being well formed XML.
>
> Do I just need to add something like <?xml ...?> or what?

If the page isn't well-formed then it isn't proper XHTML since the
XHTML specification [1] says...

    4.1. Documents must be well-formed

Yes, it's a heading, albeit in an "informative" section describing how
XHTML differs from HTML 4. See "3.2. User Agent Conformance" for a
"normative" mention of well-formedness.

You could try libxml2dom (or other libxml2-based solutions) for some
fairly effective HTML parsing:

    libxml2dom.parseString("text of document here", html=1)

See http://www.python.org/pypi/libxml2dom for more details.

Paul

[1] http://www.w3.org/TR/xhtml1/



From gagsl-py2 at yahoo.com.ar  Mon Mar  5 21:41:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 05 Mar 2007 23:41:16 -0300
Subject: classes and functions
References: <e416e10c0703021426h68e13d87qeab5a61d36980c2@mail.gmail.com>
	<mailman.4615.1172876431.32031.python-list@python.org>
	<1172952273.482935.129850@8g2000cwh.googlegroups.com>
Message-ID: <op.toqxq2l5x6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 03 Mar 2007 17:04:33 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribi?:

> On Mar 2, 11:01 pm, Nicholas Parsons <parsons.nichol... at gmail.com>
> wrote:
>> That is the beauty of using Python.  You have a choice of using
>> classes and traditional OOP techniques or sticking to top level
>> functions.  For short, small scripts it would probably be overkill to
>> use classes.  Yet the programmer still has classes in his tool chest
>> if he/she is writing code that is going to be reused in larger
>> projects.
>
> Exactly the same thing can be said about Lisp, C++, Perl, PHP, and no
> doubt many other languages that I don't know ;)
> (Well I guess C++ programs are not called 'scripts')

A notable exception being Java, even a "Hello world!" program must use a  
class.
And Eiffel, too.

-- 
Gabriel Genellina



From bendorge at gmail.com  Sat Mar 17 03:09:25 2007
From: bendorge at gmail.com (bendorge at gmail.com)
Date: 17 Mar 2007 00:09:25 -0700
Subject: Generating HTML containing XML in an INPUT tag
Message-ID: <1174115365.139421.272970@l75g2000hse.googlegroups.com>

Hi there,

Using Python, I'm auto-generating an HTML file that contains:
<input type="hidden" value="XXX" />, where XXX is XML data (encoded
somehow).

Articles regarding unicode are making my head spin! Is there a way to
encode XML file contents to a hexadecimal string that could be decoded
on a PHP server?

I have an XML file that is generated based on user entries (GUI from
PythonCard).

After the XML file is created, I want the user to see an HTML preview,
and then click an Upload button on the page. Hidden in the page is the
tag I showed above.

I decided not to generate <input type="file" /> because from a
usability standpoint, I want the user to create this file and upload
it to my PHP server in as few steps as possible. Also, I tried setting
the value to the XML file path...my browser security settings don't
like it and I'm sure other browsers won't like it either.

Any ideas?



From hg at nospam.org  Fri Mar 30 06:15:04 2007
From: hg at nospam.org (hg)
Date: Fri, 30 Mar 2007 12:15:04 +0200
Subject: Islam, the Religion of Ease
References: <1175178981.676137.156340@n59g2000hsh.googlegroups.com>
	<1175270653.284511.3820@l77g2000hsb.googlegroups.com>
	<2ubPh.257454$BK1.244465@newsfe13.lga>
Message-ID: <IzbPh.257456$BK1.50887@newsfe13.lga>

Just came to me ... if wars were always fought with fish as weapons, they'd
be much less hunger in the world ... lol ... (as a non-anglo-saxon, I
thought for many years that lol meant "Lord, Oh Lord !)

hg (Holly Grail)




From skip at pobox.com  Mon Mar 26 14:04:20 2007
From: skip at pobox.com (skip at pobox.com)
Date: Mon, 26 Mar 2007 13:04:20 -0500
Subject: how to abort on syntax errors
In-Reply-To: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <17928.2852.617743.752260@montanaro.dyndns.org>


    Josh> I have a lot of except Exception, e statements in my code, which
    Josh> poses some problems. One of the biggest is whenever I refactor
    Josh> even the triviallest thing in my code.

    Josh> I would like python to abort, almost as if it were a compile-time
    Josh> error, whenever it cannot find a function, or if I introduced a
    Josh> syntax error. But, instead, it merrily proceeds on its way.

    Josh> Is there some idiom that you use in situations like these?

In general, I think you should be more specific in the exceptions you
catch.  For example, if you want to look up a key in a dictionary and most
of the time it's there, but every now and again you need to add it, I'd use
something like this:

    try:
        val = somedict[key]
    except KeyError:
        # need to initialize slot
        somedict[key] = INITIAL_VALUE

That is, be as precise as you can in the exceptions you catch.  Also, try to
keep the body of the try block as small as you can.

Skip


From sgeiger at ncee.net  Tue Mar 20 10:57:36 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 20 Mar 2007 09:57:36 -0500
Subject: Pycron for windows - please help
In-Reply-To: <op.tpgjoo2dx6zn5v@gabriel2.softlabbsas.com.ar>
References: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>
	<op.tpgjoo2dx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <45FFF660.7050900@ncee.net>

Here's something else you should consider:  Look at the source code of 
pycron.  I just downloaded it.  Much to my surprise, this is implemented 
in about 115 lines of code.

In particular, look at the run() function.  You should try adding a 
try-except block around the system call to get a hint as to where the 
problem lies:


            try:
                 os.system('start ' + command)  
                                                                                                                                             

            
except:                                                                                                                                              

                print "Unexpected error to catch:", 
sys.exc_info()[0]                                                                                            


I've been trying to use it myself (on a Mac) since I saw you mention it 
on the mailing list.  I'm also having problems using pycron.  Email me 
directly if you figure out the problem.  I'll do the same for you.





Gabriel Genellina wrote:
> En Mon, 19 Mar 2007 16:00:04 -0300, Al <bernala at gmail.com> escribi?:
>
>   
>> I looked in the pycron.log file, and I noticed that for the entires of
>> my new job, I see "rc=4" and the end of each line. All other jobs have
>> "rc=0" at the end of the line. I assume then, that rc=4 is a reference
>> to an error code of some kind, but there is no information on this in
>> the readme.txt, at the pycron website, or here in groups.
>>
>> Does anyone know how to troubleshhot this? Thanks in advance.
>>     
>
> Contacting the author?
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From turd.flop.down.mleg at gmail.com  Thu Mar 15 03:10:00 2007
From: turd.flop.down.mleg at gmail.com (Turd Flop Down M'leg)
Date: 15 Mar 2007 00:10:00 -0700
Subject: Python eggs and openSuse 10.2 errors
Message-ID: <1173942600.262524.196550@n59g2000hsh.googlegroups.com>

Heyas

So I got all hooked on python eggs at pycon, but then I got all hooked
on openSuse 10.2 (with the xgl cube and the beryl fanciness, and some
other misc debris).  Unfortunately, it doesnt appear that openSuse
10.2, which is using python 2.5, wants to play nicely with python
eggs.  When I try to run `sudo python ez_setup.py`, I simply get an
error:
   Downloading http://cheeseshop.python.org/packages/2.5/s/setuptools/setuptools-0.6c5-py2.5.egg
   error: invalid Python installation: unable to open /usr/lib/
python2.5/config/Makefile (No such file or directory)

The /usr/lib/python2.5/config directory didnt exist, so I tried
creating it but with no change in results.


Thanks,
Tfdml



From rahul986 at gmail.com  Tue Mar 27 09:19:41 2007
From: rahul986 at gmail.com (Legend)
Date: 27 Mar 2007 06:19:41 -0700
Subject: Python Error :(
Message-ID: <1175001581.323552.37250@n59g2000hsh.googlegroups.com>

I wasn't able to run a Python script. But then later I was able to run
it through the Shell. I was experimenting with cron jobs and set up
the python execution in as a cron. The first time it ran, It was fine
but then after that, it started giving me some errors. Now when I try
to run the script directly, I get the following error:



Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "userbot.py", line 637, in ?
    con = connect()
  File "userbot.py", line 607, in connect
    con.requestRoster()
  File "user.py", line 531, in requestRoster
    self.SendAndWaitForResponse(rost_iq)
  File "user.py", line 326, in SendAndWaitForResponse
    return self.waitForResponse(ID)
  File "user.py", line 300, in waitForResponse
    self.process(1)
  File "xmlstream.py", line 459, in process
    if not len(self.read()): # length of 0 means disconnect
  File "xmlstream.py", line 398, in read
    data_in=data_in+self._sslObj.read(BLOCK_SIZE).decode('utf-8')
socket.sslerror: (6, 'TLS/SSL connection has been closed')


Any help please?



From http  Thu Mar  8 19:19:27 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 16:19:27 -0800
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>
Message-ID: <7xbqj3i7zk.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> I thought "raise" on its own was supposed to re-raise the previous
> exception, but I've just tried it in the interactive interpreter and it
> doesn't work for me.

It means you can catch an exception, do stuff with it, and then pass
it upward to earlier callers:

    def foo(n):
       try:
          bar(n)
       except (ValueError, TypeError):
          print "invalid n:", n
          raise  # re-signal the same error to foo's caler


From nagle at animats.com  Mon Mar 19 17:34:39 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 19 Mar 2007 21:34:39 GMT
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <1174334517.125928.274140@l75g2000hse.googlegroups.com>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>
	<56863eF27p5bmU1@mid.uni-berlin.de>
	<WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
	<1174334517.125928.274140@l75g2000hse.googlegroups.com>
Message-ID: <PlDLh.9333$Um6.5670@newssvr12.news.prodigy.net>

kyosohma at gmail.com wrote:
> On Mar 19, 2:45 pm, John Nagle <n... at animats.com> wrote:
> 
>>Diez B. Roggisch wrote:
>>
>>>John Nagle schrieb:
>>
>>>>  I'm looking for something that can read .MDB files, the format
...
> I've read .MDB files using ODBC. I don't know how big your files are,
> but I had a file with almost 3000 rows and I was able to fetch it in
> 1-2 seconds. If you want to give it whirl, you just need to create an
> ODBC connection ....

     But that was on Windows, right?   ODBC is just a connection
mechanism.  You have to have a database of the right type to
which you can connect.  On Windows, there's Jet, the engine
behind Microsoft Access, but what do you connect to on Linux?

				John Nagle


From kyosohma at gmail.com  Fri Mar 16 14:48:27 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 16 Mar 2007 11:48:27 -0700
Subject: TypeError: 'module' object is not callable
In-Reply-To: <1174066969.563803.216040@p15g2000hsd.googlegroups.com>
References: <1174066969.563803.216040@p15g2000hsd.googlegroups.com>
Message-ID: <1174070907.553345.59340@n76g2000hsh.googlegroups.com>

On Mar 16, 12:42 pm, randomt... at gmail.com wrote:
> Hello everyone!
> i have the following test code:
> class temp:
>     def __init__(self):
>         self.hello = "hello world!"
>     def printworld(self):
>         print(self.hello)
> t = temp()
>
> and i tried to call profile('t.printworld()')
>
> but i received the following error:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: 'module' object is not callable
>
> I'm not sure what is wrong exactly, if anyone can point me to the
> right direction, it would be much appreciated!



If you're using the profile module, you need to do something like

profile.run('t.printworld()')

Good luck,

Mike



From grante at visi.com  Mon Mar 12 23:33:03 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 13 Mar 2007 03:33:03 -0000
Subject: Python in a desktop environment
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<55lbl1F25geaaU1@mid.uni-berlin.de>
	<45f58642$0$1408$426a74cc@news.free.fr>
	<1173747820.728559.102360@q40g2000cwq.googlegroups.com>
Message-ID: <12vc6rfq995undb@corp.supernews.com>

On 2007-03-13, David Cramer <dcramer at gmail.com> wrote:

> Everyone seems to have misunderstood what I want.

One might suspect that your request was unclear. ;)

> I'm a Python developer, I don't give a rats ass about what
> people say about C#, Python, or c++, they all have their uses.
> My main reasoning for considering C++ as the backend is some
> things (reading memory for example) are much easier to do in
> C++ than in Python, and we already have a lot written in C++.

Reading memory is actually pretty trivial in Python.

> The argument about robustness, has nothing to do with how
> nicely formatted the language is, or how great the tracebacks
> are, it's strictly about how high the memory cost is and how
> much CPU it's going to take.

No, that's not at all what "robust" means (at least not to
anybody I know).  Robust means that the program is always
well-behaved.  It doesn't crash.  It doesn't leak memory.  It
isn't full of security holes.  It's got nothing to do with
resource usage.

> Python is well known for being high on memory and C++ being
> compiled can be a lot faster for things.

True, but that's nothing to due with robustness.  A fast, small
program that crashes, leaks memory, and gives incorrect results
is not robust.  A large slow program that doesn't crash
regardless of input and produces correct results is robust.

> Anyways, thanks for everyones feedback, we will most likely go
> with a combination of Python and C++.

I think you're nuts to decide that you need C++ before you've
tested a Python implementation, but it's your nickle. :)

-- 
Grant Edwards                   grante             Yow!  Make me look like
                                  at               LINDA RONSTADT again!!
                               visi.com            


From anil.jupiter9 at gmail.com  Sat Mar 10 10:40:23 2007
From: anil.jupiter9 at gmail.com (jupiter)
Date: 10 Mar 2007 07:40:23 -0800
Subject: Database module & multithreading
In-Reply-To: <mailman.4904.1173539770.32031.python-list@python.org>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
Message-ID: <1173541223.545628.29650@64g2000cwx.googlegroups.com>

On Mar 10, 8:16 pm, Michael Bentley <rmc... at gmail.com> wrote:
> > Thanx for this pointer buddy! I have done my homework. Some Database
> > modules are not actively maintained some modules  does not work with
> > Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
> > it dosent allow me to use multi threading so which database module is
> > better in terms of multithreading
>
> Actually, I think sqlite3 just requires that each thread have its own  
> connection and cursor.

Exception in thread Thread-2:
Traceback (most recent call last):
  File "D:\Python25\lib\threading.py", line 460, in __bootstrap
    self.run()
  File "url_part1.py", line 161, in run
    dbacc(self.o, self.dbase).dataenter()
  File "url_part1.py", line 64, in dataenter
    self.c.execute('insert into '+self.odbase+' values
(?,?,?,?,?,?,?,?,?,?,?,?,
?)',self.odata)
InterfaceError: Error binding parameter 3 - probably unsupported type.

this is the error I am getting................



From ceball at gmail.com  Tue Mar 27 04:54:40 2007
From: ceball at gmail.com (Chris)
Date: 27 Mar 2007 01:54:40 -0700
Subject: Tkinter Toplevel geometry
In-Reply-To: <dflid4-975.ln1@lairds.us>
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
	<0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>
	<hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>
	<1174824649.683426.78990@d57g2000hsg.googlegroups.com>
	<dflid4-975.ln1@lairds.us>
Message-ID: <1174985680.393901.170910@p77g2000hsh.googlegroups.com>


> A TRULY good way to show your thanks for help like this
> is to write up what you learned at theTkinterWiki <URL:http://tkinter.unpythonic.net/wiki/>.  Note:
> A.  You have to log in to edit pages
>     on this particular Wiki.  If you
>     decide to join us, then, you'll
>     first need to create an account.

I'll do that, yes. I guess I should create a 'Toplevel' page and put
the information on there? Unless someone can suggest something better.

I also wonder if I should have posted this question to the tkinter-
discuss mailing list (see http://tkinter.unpythonic.net/wiki/TkinterDiscuss)
instead of to comp.lang.python. However, I wasn't aware of that list
before, and it's not linked to from the python.org 'community' page
(as far as I can see - and in fact, the python.org pages imply that
tkinter questions should be asked on comp.lang.python). I'm new to
tkinter, so it wasn't immediately clear where to get help.



From ad_scriven at postmaster.co.uk  Thu Mar  8 09:17:24 2007
From: ad_scriven at postmaster.co.uk (Antony Scriven)
Date: 8 Mar 2007 06:17:24 -0800
Subject: VIM: Python type indented-block command equivalent to % for C?
In-Reply-To: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>
References: <1173330126.098105.275160@n33g2000cwc.googlegroups.com>
Message-ID: <1173363444.322590.105280@v33g2000cwv.googlegroups.com>

[F-ups set to comp.editors]

Paddy3118 wrote:

 > Not python:
 >     but python type
 >     indented text
 >
 >     Notice the blank line above.
 >     It could have several
 >     spaces or tabs, and still
 >     be a part of the block
 >     beginning 'Not python:':
 >       The block ends at the
 >       first non-blank line
 >       with less indent.
 >
 > Assuming that only space characters are allowed
 > for indenting, is their a way to yank a Python
 > block like y% works for C , or a way to move to
 > the end of a block defined by indentation?

I expect there are scripts for Python. Try googling and
www.vim.org. Anyway I'm not sure that I understand your
description 100%, but try something like this.

   :ono = /\n.*\%<<C-R>=indent('.')<CR>c\S\\|\%$/+0<CR>

Now try d= y= etc. Also note that I've made it work
linewise. And take look at :help /\%v if you want it to
work with tabs. --Antony



From mattias at comtech-data.se  Wed Mar  7 04:47:30 2007
From: mattias at comtech-data.se (Mattias Nilsson)
Date: Wed, 07 Mar 2007 10:47:30 +0100
Subject: How to check whether file is open or not
In-Reply-To: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
References: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
Message-ID: <esm1ni$1m9$1@news.al.sw.ericsson.se>

Ros wrote:
> There are 10 files in the folder. I wish to process all the files one
> by one. But if the files are open or some processing is going on them
> then I do not want to disturb that process. In that case I would
> ignore processing that particular file and move to next file.
> 
> How can I check whether the file is open or not?
> 
<snip>

 From what I know: You can't, in a platform independent way.

You'd still be in trouble even if python would let you write something like:

if file_is_open(filename):
     process_file(filename)


There's nothing that says no one will open the file after the 
file_is_open call but before the process_file call. Also, the file might 
be opened during the processing.

If the files to be processed only are written and then closed without 
being reopened or modified, then your situation is a bit simpler.

If you can get the process that creates the files to cooperate, a common 
way to solve this problem is to have a temporary suffix on files while 
they are being created. Once the file is complete, the temporary suffix 
is removed and that signals to other processes that this file is ready 
for processing.







From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 31 07:38:19 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 31 Mar 2007 13:38:19 +0200
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
References: <mailman.5803.1175334924.32031.python-list@python.org>
Message-ID: <576vhbF2ca1guU1@mid.individual.net>

Mark Dufour wrote:

> Shed Skin allows for translation of pure (unmodified), implicitly
> statically typed Python programs into optimized C++, and hence,
                                                           ^^^^^
> highly optimized machine language. 
  ^^^^^^^^^^^^^^^^

Wow, I bet all C++ compiler manufacturers would want you to work for
them.

Regards,


Bj?rn

-- 
BOFH excuse #23:

improperly oriented keyboard



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 15 08:58:35 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 15 Mar 2007 13:58:35 +0100
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <mailman.5130.1173960370.32031.python-list@python.org>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>	<et958a$o9c$1@news2.u-psud.fr>	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
	<mailman.5130.1173960370.32031.python-list@python.org>
Message-ID: <45f942d7$0$3217$426a74cc@news.free.fr>

Steve Holden a ?crit :
> bearophileHUGS at lycos.com wrote:
>> Laurent Pointal:
>>> you may prefer range/items when processing of the result
>>> value explicitly need a list (ex. calculate its length)
>>
>> Creating a very long list just to know the len of an iterator is
>> barbaric, so sometimes I use this:
>>
>> def leniter(iterator):
>>     if hasattr(iterator, "__len__"):
>>         return len(iterator)
>>     nelements = 0
>>     for _ in iterator:
>>         nelements += 1
>>     return nelements
>>
> Of course this is a little like the Heisenberg uncertainty principle if 
> the iterator has no __len__ attribute - once you know how long it is you 
> no longer have access to the elements. Or did I miss something?

yes, that's one of the side effects. Another interesting case:

import itertools
it = itertools.cycle(range(10))
print "it has %d elements" % leniter(it)




From bignose+hates-spam at benfinney.id.au  Mon Mar  5 09:13:12 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 06 Mar 2007 01:13:12 +1100
Subject: implementing SFTP using Python
References: <mailman.14656.1172910604.32030.python-list@python.org>
	<586552.89486.qm@web38809.mail.mud.yahoo.com>
Message-ID: <87649f22yv.fsf@benfinney.id.au>

kadarla kiran kumar <kadarlakiran at yahoo.com> writes:

Please don't top-post; instead, place your reply directly beneath the
quoted text you're responding to, and remove any quoted lines that
aren't relevant to your response.

>   Now Iam trying to run the demo scripts available with paramiko package.

You've gone further than me, then. Hopefully you can find help from
someone more experienced with that package; perhaps it has its own
support mailing list, or a developer contact email address.

-- 
 \                 "He who laughs last, thinks slowest."  -- Anonymous |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From sjmachin at lexicon.net  Sat Mar 24 17:48:16 2007
From: sjmachin at lexicon.net (John Machin)
Date: 24 Mar 2007 14:48:16 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <1174746810.280731@jubilee.claranet.pt>
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<1174746810.280731@jubilee.claranet.pt>
Message-ID: <1174772896.902905.25640@p15g2000hsd.googlegroups.com>

On Mar 25, 12:32 am, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> John Machin escreveu:
> ..
>
>
>
> > Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on
> > win32
> > Type "help", "copyright", "credits" or "license" for more information.
> > | >>> help("".join)
> > Help on built-in function join:
>
> > join(...)
> >     S.join(sequence) -> string
>
> >     Return a string which is the concatenation of the strings in the
> >     sequence.  The separator between elements is S.
>
> > | >>>
>
> > OK, I'll bite: This was "new" in late 2000 when Python 2.0 was
> > released. Where have you been in the last ~6.5 years?
>
> In a response to one of my posts I was told 'string' is
> obsolet. 'string' was enough for me, but if it is obsolet
> then there should be a *new* way, isn't it? The *new*
> way I was told to use is "str methods".
> I tried that *new* way to do *old* 'string' job.

So much was obvious from your post.

> Voila
> the reason of my so pertinent question.

What was not obvious was (1) if you have been using Python for a
while, how you managed to be unaware of str methods (2) if you are a
newbie, how you managed to find out about the string module but not
find out about str methods [e.g. it's easy to miss the one line in the
"official" Python tutorial that refers to them] (3) why you were not
using obvious(?) methods to find out for yourself -- much faster than
posing a question on the newsgroup, and you don't have to face the
possibility of an impertinent response :-)

> I am deeply sorry to have disturbed you in your python's heaven.

I wasn't disturbed at all (you would have to try much harder), only
mildly curious.

>
> Next time I'll read all books available, all texts including
> the python formal description before
> posting,

A rather strange way of finding an answer to a simple question. A
focussed search (or an index!) is more appropriate. Why would you
expect the python formal description to have details on the syntax of
individual class methods? Do you always do a serial scan of all tables
for any database query? In addition to approaches I mentioned earlier,
you could try:

(1) going to the docs page on the Python website (http://
www.python.org/doc/), click on the "Search" link about one-third down
the page, and search for "join". You would get 6 results, one of which
is "join() (string method)"

(2) If you are using Windows, use the index tab in the Python-supplied
docs gadget: type in "join" and get the same 6 results. I believe this
facility is available (through a 3rd party) on Linux. [Having the docs
on your PC or USB storage device is very useful if you are working in
an environment where access to the Internet is restricted].

(3) Use Google groups, go to comp.lang.python, type "join string" into
the search box, and click on "Search this group". First result is the
current thread; most (or maybe all) of the next six or so will give
you the syntax your were looking for.

(4) Using Google or any other reasonable web searcher, search for the
3 words: Python join string. Any one of the first few hits gives the
answer you were seeking.

HTH,
John



From skip at pobox.com  Sun Mar  4 13:11:27 2007
From: skip at pobox.com (skip at pobox.com)
Date: Sun, 4 Mar 2007 12:11:27 -0600
Subject: Where I could find older python releases ?
In-Reply-To: <2f3066870703040152n327140f3p9d0a132a807ebe80@mail.gmail.com>
References: <2f3066870703040152n327140f3p9d0a132a807ebe80@mail.gmail.com>
Message-ID: <17899.3023.770908.994486@montanaro.dyndns.org>


    Martins> I have been searching the internet for python version 0.9.0
    Martins> sources which had been posted to alt.sources list, but without
    Martins> any luck. Maybe someone has it available somewhere ?

If you *really* want Python 0.9.0 and not PyPy 0.9.0, I think you're going
to have to deduce and check out the appropriate revision from the Subversion
repository.  Looking at the Misc/HISTORY file it appears that 0.9.0 was
released in February 1991.  Looking at the Subversion log I don't see any
specific comment pertaining to a release, but I see a lot of checkins on
1991-02-19, the last being r2314.  The next checkin after that is on
1991-03-06.  Since 0.9.1 was also released in February 1991, r2314 will
probably get you that version, or something very near to it.

Skip




From skip at pobox.com  Thu Mar 22 09:40:35 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 22 Mar 2007 08:40:35 -0500
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <ettk02$6kc$1@news1.zwoll1.ov.home.nl>
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
Message-ID: <17922.34643.455144.575280@montanaro.dyndns.org>

>>>>> "Anton" == Anton Vredegoor <anton.vredegoor at gmail.com> writes:

    Anton> Steve Holden wrote:
    >> Feel better now?

    Anton> Yes! But *now* I'm afraid it will have negative consequences for
    Anton> my future employability. However if it will lead to adjusting the
    Anton> kind of submissions at http://www.python.org/community/jobs/ it
    Anton> was probably worth it.

I think the steady increase in the number of active listings over the past
couple years bodes well for the job prospects of Python programmers as a
whole.  There are currently 99 job postings on the job board dating back to
mid-December.  A year ago there were about 60, a year before that, about 40.
A number of those companies seem to be fairly enlightened about the use of
open source software (search for "open").  You can't expect the world to
completely change overnight.  Most companies probably still funnel external
job postings through their HR departments.  As a result, a certain amount of
boilerplate text and corporate puffery is bound to turn up in many postings.
Be thankful they at least found the job board or comp.lang.python and aren't
just trying to recruit through traditional channels.  You'd probably never
see job postings for the Space Telescope Science Institute or The World Wide
Workshop for Children's Media Technology and Learning if they only appeared
in the Washington Post or New York Times.

Skip


From andi.clemens at gmx.net  Thu Mar  1 07:14:23 2007
From: andi.clemens at gmx.net (andi.clemens at gmx.net)
Date: 1 Mar 2007 04:14:23 -0800
Subject: How to update DNS record
In-Reply-To: <54nkvtF21ft8aU1@mid.individual.net>
References: <es5v6v$pv8$1@online.de><54nkvtF21ft8aU1@mid.individual.net>
Message-ID: <1172751262.972242.215990@p10g2000cwp.googlegroups.com>

On Mar 1, 10:33 am, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Read RFC 2136 (Dynamic updates in the DNS) and see if your server
> can be configured to do this. If not, you'll have to change the
> zone files manually and reload the DNS config.

It worked before with a perl script, but now I'm using django for all
our web services so I want to implement this update function in Python
as well.
I don't know how to do this in Python, right now I'm trying it with
twisted, but I don't what to do exactly. It would be nice if somebody
has an example for doing this.

Andi



From steve at holdenweb.com  Thu Mar 22 04:48:27 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 04:48:27 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
References: <ets9hc$74f$1@news.onet.pl>	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>	<etscd5$g0g$1@news.onet.pl>	<7WjMh.318$YL5.80@newssvr29.news.prodigy.net>	<1hvcadb.134pbvp1y39wi3N%aleax@mac.com>
	<DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
Message-ID: <ettfvd$s49$1@sea.gmane.org>

Mark T wrote:
> "Alex Martelli" <aleax at mac.com> wrote in message 
> news:1hvcadb.134pbvp1y39wi3N%aleax at mac.com...
>> John Nagle <nagle at animats.com> wrote:
>>
>>> Marcin Ciura wrote:
>>>
>>>> Neither would I. I must have expressed myself not clearly enough.
>>>> Currently
>>>> x = y = z
>>>> is roughly equivalent to
>>>> x = z
>>>> y = z
>>>> I propose to change it to
>>>> y = z
>>>> x = z
>>> Actually, it is equivalent to
>>>
>>>       y = z
>>>       x = y
>> Not really:
>>
>>>>> class chatty(object):
>> ...   def __init__(self): self.__dict__['__hide'] = {}
>> ...   def __setattr__(self, name, value):
>> ...     print 'sa', name, value
>> ...     self.__dict__['__hide'][name] = value
>> ...   def __getattr__(self, name):
>> ...     print 'ga', name
>> ...     return self.__dict__['__hide'].get(name)
>> ...
>>>>> c = chatty()
>>>>> x = c.zop = 23
>> sa zop 23
>> As you can see, there is no read-access to c.zop, which plays the role
>> of y there.
>>
>>
>> Alex
> 
> This is interesting:
> 
>>>> class Test(object):
> ...   def __getattribute__(self,n):
> ...     print 'reading',n
> ...     return object.__getattribute__(self,n)
> ...   def __setattr__(self,n,v):
> ...     print 'writing',n,v
> ...     return object.__setattr__(self,n,v)
> ...
>>>> x=Test()
>>>> x.a=1; x.b=2; x.c=3
> writing a 1
> writing b 2
> writing c 3
>>>> x.a=x.b=x.c
> reading c
> writing a 3
> writing b 3
> 
> I wouldn't have expected "a" to be assigned first in a right-to-left parsing 
> order.  The result is the same in any case.
> 
It would be nice if your confusion could have been avoided by reading 
the reference manual, but unfortunately the current syntax definition 
doesn't seem to even acknowledge the possibility of multiple assignments 
such as the one under discussion!

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From jjl at pobox.com  Thu Mar 15 16:10:43 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 15 Mar 2007 20:10:43 GMT
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
	<1173581125.663707.5810@s48g2000cws.googlegroups.com>
	<87odmvinhf.fsf@pobox.com>
	<Hh0Kh.3232$Qw.920@newssvr29.news.prodigy.net>
	<871wjrs4vo.fsf@pobox.com> <87ps7bz527.fsf@gmail.com>
Message-ID: <87y7lymfna.fsf@pobox.com>

Jorge Godoy <jgodoy at gmail.com> writes:

> jjl at pobox.com (John J. Lee) writes:
> 
> > John Nagle <nagle at animats.com> writes:
> >
> >> John J. Lee wrote:
> >> > "Graham Dumpleton" <Graham.Dumpleton at gmail.com> writes:
> >> >
> >> >>On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
> >> 
> >> > Is it possible to ask mod_python to start separate processes to serve
> >> > requests, rather than "separate" interpreters?  We couldn't see a way.
> >> 
> >>     That's what CGI does.
> >
> > I meant long running processes, as I hoped was obvious from context...
> 
> Maybe FastCGI should help, then.  It can run "forever" after a request has
> finished so it is suitable for long running processes. 

Yes, we've used FastCGI too.  My question was specifically about
mod_python.


John


From hg at nospam.org  Wed Mar 14 08:08:00 2007
From: hg at nospam.org (hg)
Date: Wed, 14 Mar 2007 13:08:00 +0100
Subject: logging and wx.Timer
References: <gdSJh.6304$Ng1.1551@newsfe19.lga>
	<1173890343.427588.285370@l77g2000hsb.googlegroups.com>
Message-ID: <lRWJh.60$0K1.38@newsfe21.lga>

Jordan wrote:

> On Mar 14, 1:52 am, hg <h... at nospam.org> wrote:
>> Hi,
>>
>> I read that logging was thread safe ... but can I use it under a GUI
>> timer ?
>>
>> Thanks,
>>
>> hg
> 
> That was barely enough information to be worthy of a reply.  Need more
> than that.  What do you mean under a gui timer? What gui? What type of
> usage? More info = more (and better) help.  Cheers.
> 
> JT

Twas in the title: wx.timer

REgards,

hg



From gagsl-py2 at yahoo.com.ar  Thu Mar 15 19:31:53 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 15 Mar 2007 20:31:53 -0300
Subject: problem with str()
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
	<1173990743.998399.82020@b75g2000hsg.googlegroups.com>
Message-ID: <op.to87nfs3x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 15 Mar 2007 17:32:24 -0300, <kyosohma at gmail.com> escribi?:

> methodList = [str for str in names if callable(getattr(obj, str))]
>
> instead, do something like this:
>
> methodList = [i for i in names if callable(getattr(obj, i))]

The fact that a list comprehension "leaks" its variables into the  
containing scope is a bit weird.
A generator expression doesn't:

py> str
<type 'str'>
py> w = (str for str in range(10))
py> w
<generator object at 0x00AD7C38>
py> str
<type 'str'>
py> w.next()
0
py> str
<type 'str'>

-- 
Gabriel Genellina



From aahz at pythoncraft.com  Tue Mar 20 09:12:23 2007
From: aahz at pythoncraft.com (Aahz)
Date: 20 Mar 2007 06:12:23 -0700
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<mailman.5284.1174321784.32031.python-list@python.org>
	<1hv8wz8.19mj0kb1k9m2m8N%aleax@mac.com>
Message-ID: <etomjn$lo9$1@panix3.panix.com>

In article <1hv8wz8.19mj0kb1k9m2m8N%aleax at mac.com>,
Alex Martelli <aleax at mac.com> wrote:
>
>list(iterimage(etc etc))
>
>is surely a better way to express identical semantics.  More generally,
>[x for x in whatever] (whether x is a single name or gets peculiarly
>unpacked and repacked like here) is a good example of inappropriate LC,
>to get back to the question in the subject: list(whatever) is the "one
>obvious way" to perform the same task.

Except of course, when it's

[x for x in whatever if x]

I'm exceedingly fond of replacing filter() with listcomps.  They're so
much more readable and often faster.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"Typing is cheap.  Thinking is expensive."  --Roy Smith


From nick at craig-wood.com  Mon Mar 26 06:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 26 Mar 2007 05:30:04 -0500
Subject: with timeout(...):
Message-ID: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>

Did anyone write a contextmanager implementing a timeout for
python2.5?

I'd love to be able to write something like

    with timeout(5.0) as exceeded:
        some_long_running_stuff()
    if exceeded:
        print "Oops - took too long!"

And have it work reliably and in a cross platform way!

>From my experiments with timeouts I suspect it won't be possible to
implement it perfectly in python 2.5 - maybe we could add some extra
core infrastructure to Python 3k to make it possible?

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From davecook at nowhere.net  Thu Mar 29 23:04:17 2007
From: davecook at nowhere.net (Dave Cook)
Date: Fri, 30 Mar 2007 03:04:17 GMT
Subject: pygtk: how to make a screenlocking window?
References: <mailman.5704.1175081076.32031.python-list@python.org>
Message-ID: <R6%Oh.47800$A53.27767@newsfe13.lga>

On 2007-03-28, Andr? Wyrwa <a.wyrwa at gmx.de> wrote:

> can anyone please point me to the relevant pygtk window properties i
> need to set to make a window
> - fullscreen
> - stay in front
> - grab all input focus
> so that i can use it as a screen lock the likes that gksu or
> gnome-power-manager do?

See the reference page for gtk.Window:

http://pygtk.org/docs/pygtk/class-gtkwindow.html

Methods of interest are fullscreen(), set_modal(), set_type_hint(),
set_keep_above().

Dave Cook


From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 17 02:01:13 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 17 Mar 2007 17:01:13 +1100
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>

On Fri, 16 Mar 2007 18:17:08 -0800, Paul Rubin wrote:

> tkpmep at hotmail.com writes:
>> Or with a generator comprehension
>> n  = sum ( y>x[i] for i in range(len(x)) ) - 1
>> 
>> But there  has to be a cleaner way, as the first approach is unwieldy
>> and does not adapt to changing list lengths, and the second is not
>> obvious to a casual reader of the code.
> 
> How about:
> 
>   n = len([y > t for t in x])

(1) It's wrong. That always returns the length of the list. Perhaps you
meant something like this?

len(["anything will do" for t in x if y > t])

or even

len(filter(lambda t, y=y: y>t, x))



(2) It's barely more comprehensible than the alternative that the Original
Poster rejected for being insufficiently clear.

Since (almost) everyone insists on ignoring the bisect module and
re-inventing the wheel, here's my wheel:


def find(alist, n):
    """Return the position where n should be inserted in a sorted list."""
    if alist != sorted(alist):
        raise ValueError('list must be sorted')
    where = None
    for i in range(len(alist)):
        if where is not None:
            break
        alist.insert(i, n)
        if alist == sorted(alist):
            where = i
        del alist[i]
    if where is None:
        where = len(alist)
    return where


Here's another dodgy implementation:


def find(alist, n):
    return sorted(alist + [n]).index(n)

It's especially good for large lists. Not!



-- 
Steven.



From bbxx789_05ss at yahoo.com  Sun Mar 25 02:13:53 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 23:13:53 -0700
Subject: functions, classes, bound, unbound?
In-Reply-To: <gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
	<gsidnUEwIpYIZZjbnZ2dnUVZ_oytnZ2d@comcast.com>
Message-ID: <1174803233.118069.234290@l75g2000hse.googlegroups.com>

> ...classes don't invoke the function directly, they convert it to
> an 'unbound method' object::
>
>      >>> class Test(object):
>      ...     def greet():
>      ...         print 'Hello'
>      ...
>      >>> Test.greet
>      <unbound method Test.greet>
>      >>> Test.greet()
>      Traceback (most recent call last):
>        File "<interactive input>", line 1, in <module>
>      TypeError: unbound method greet() must be called with Test instance
>      as first argument (got nothing instead)
>

I think I found the rule in the GvF tutorial, which is essentially
what the error message says:
-------
When an unbound user-defined method object is called, the underlying
function (im_func) is called, with the restriction that the first
argument must be an instance of the proper class (im_class) or of a
derived class thereof.
--------

So, if you call a function using the syntax  TheClass.theMethod(),
then you are required to use an instance object as an argument.

In section 3.2 The Standard Class Hierarchy, it also says this:
-------
When a user-defined method object is created by retrieving a user-
defined function object from a class, its im_self attribute is None
and the method object is said to be unbound. When one is created by
retrieving a user-defined function object from a class via one of its
instances, its im_self attribute is the instance, and the method
object is said to be bound.
--------

In that first sentence, is he talking about retrieving the user-
defined function object from the class using the class name, e.g:

MyClass.someFunc

Is there some other way to retrieve a user-defined function object
from a class other than using the class name or an instance?


> If you really want to get to the original function, there are a couple
> of options.  

No.  Just trying to figure out how some things work.



From texiereric at yahoo.com  Thu Mar 15 01:27:46 2007
From: texiereric at yahoo.com (Eric Texier)
Date: Thu, 15 Mar 2007 05:27:46 GMT
Subject: performance question
Message-ID: <mP4Kh.6945$yW.6277@newssvr11.news.prodigy.net>

I need speed here. What will be the fastest method or does it matter?

(for the example 'a' is only 3 values for the clarity of the example)
a = [1,3,4.] ##


method1:

f.write("vec %f %f %f \n" % (a[0],a[1],a[2]))

method2:

f.write("vec " + str(a[0]) + " " + str(a[1]) + " " + str(a[2]) + "\n")

also it there a relevant speed difference between making few small write
instead of 1 bigger one.

Thanks for any feed back,
Eric


From duncan.booth at invalid.invalid  Mon Mar  5 10:23:08 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 5 Mar 2007 15:23:08 GMT
Subject: ANN: pyftpdlib 0.1 released
References: <1173102514.190879.7600@p10g2000cwp.googlegroups.com>
	<Xns98EA90A109B37duncanbooth@127.0.0.1>
	<1173104494.751597.98150@p10g2000cwp.googlegroups.com>
Message-ID: <Xns98EA9C2CAE29Fduncanbooth@127.0.0.1>

"billiejoex" <gnewsg at gmail.com> wrote:

> I removed them by using google groups interface but maybe
> with no success.

You were probably successful in removing them from Google groups, but that 
is just one amongst many usenet servers. In general you cannot expect to 
delete messages from other servers.

The best thing is to always make a point of reading a post carefully before 
hitting the send button, live with any minor typos, and post a correction 
as a followup if you need to correct any major mistakes.


From ptmcg at austin.rr.com  Fri Mar 16 04:02:32 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Mar 2007 01:02:32 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174024143.049965.25710@l77g2000hsb.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
Message-ID: <1174032152.756826.150950@o5g2000hsb.googlegroups.com>

On Mar 16, 12:49 am, "n00m" <n... at narod.ru> wrote:

> for o in range(int(f.readline())):
>   row = map(int, f.readline().split())
>   q.append(row[0])
>   w.append(row[1])
>   e.append(row[2])
>   r.append(row[3])

Does this help at all in reading in your data?

numlines = f.readline()
rows = [ map(int,f.readline().split()) for _ in range(numlines) ]
q,w,e,r = zip(rows)

-- Paul



From vorner at ucw.cz  Mon Mar 12 06:55:58 2007
From: vorner at ucw.cz (Michal 'vorner' Vaner)
Date: Mon, 12 Mar 2007 11:55:58 +0100
Subject: programmatically manipulation environment variables of the
	calling shell
In-Reply-To: <55kp0cF25ntciU1@mid.uni-berlin.de>
References: <mailman.4959.1173695641.32031.python-list@python.org>
	<55kp0cF25ntciU1@mid.uni-berlin.de>
Message-ID: <20070312105558.GC10058@tarantula.kolej.mff.cuni.cz>

Hello,

On Mon, Mar 12, 2007 at 11:40:11AM +0100, Diez B. Roggisch wrote:
> Maxim Veksler wrote:
> > I'm trying to write a python script that would allow me to manipulate
> > shell variables of the calling shell. I'm trying to write some logic
> > that would know to add LD_LIBRARY_PATH to the users environment.
> 
> It's not possible, OS restrictions - you are not allowed to alter the
> environment of a parent process. 

Actually, you are able to modify only your own environment (and call a
new process with any possible environment). And the restrictions seem to
me rather technical - the process would have to change its behaviour
each time it changes.

With regards

-- 
grep me no patterns and I'll tell you no lines.

Michal 'vorner' Vaner
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From deets at nospam.web.de  Wed Mar  7 17:30:10 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 07 Mar 2007 23:30:10 +0100
Subject: Best place for a function?
In-Reply-To: <mailman.4775.1173306427.32031.python-list@python.org>
References: <mailman.4775.1173306427.32031.python-list@python.org>
Message-ID: <558soiF23polgU1@mid.uni-berlin.de>

Sergio Correia schrieb:
> I'm writing a class, where one of the methods is kinda complex. The
> method uses a function which I know for certain will not be used
> anywhere else. This function does not require anything from self, only
> the args passed by the method.
> 
> Where should I put the function?
> 
> a) Inside the module but outside the class (to avoid cluttering it;
> besides the function does not require to access any property or method
> of the class).
> 
> # mymodule.py
> 
> def  _myfunction():
>     ...
> 
> class myclass(object):
>     def mymethod(self):
>          ...
>          spam = _myfunction()
>    ...
> 
> 
> b) Inside the class but outside the method
> 
> # mymodule.py
> 
> class myclass(object):
>     def  _myfunction(self):
>         ...
> 
>     def mymethod(self):
>          ...
>          spam = self._myfunction()
>    ...
> 
> c) Inside the method:
> 
> # mymodule.py
> 
> class myclass(object):
>     ...
>     def mymethod(self):
>         def  _myfunction(self):
>                   ...
>         ...
>         spam = self._myfunction()
>     ...
> 
> 
> I'm new to python (and couldn't find anything about this in PEP 8).
> What would you suggest me?

If it really has no other use as in this class, put it as an 
instancemethod in there. Alternatively, you _could_ nest it like this:

class Foo(object):

    def bar(self):
        def my_long_important_method(argument):
            pass
        pass


Diez


From dadapapa at googlemail.com  Thu Mar 15 03:11:56 2007
From: dadapapa at googlemail.com (Harold Fellermann)
Date: 15 Mar 2007 00:11:56 -0700
Subject: design question: no new attributes
In-Reply-To: <61IFh.7997$KE2.5053@trnddc06>
References: <8BIEh.1349$QI4.489@trnddc01>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08>
	<45e60fdc$0$30655$426a34cc@news.free.fr>
	<xgBFh.4185$854.1692@trnddc04>
	<45e7438f$0$29410$426a74cc@news.free.fr>
	<61IFh.7997$KE2.5053@trnddc06>
Message-ID: <1173942716.446942.213160@b75g2000hsg.googlegroups.com>

Hi Alan,

> One last point. While I remain interested in examples of how
> "late" addition ofattributesto class instances is useful,
> I must note that everyone who responded agreed that it
> has been a source of bugs.  This seems to argue against a
> general ban on "locking" objects in some way, in some
> circumstances.

If you want to restrict "late" addition of attributes, no-one will
prevent you to do so.
Arnaud has already given you an example implementation. Here is mine:

>>> class Foo(object) :
...
...     _locked = False
...
...     def __setattr__(self,attr,var) :
...         if self._locked and not attr in dir(self):
...             raise RuntimeError
...         else :
...             object.__setattr__(self,attr,var)
...
...     def lock(self) :
...         self._locked = True
...
>>> foo = Foo()
>>> foo.bar = 'allowed'
>>> foo.lock()
>>> foo.spam = 'fails'
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "<stdin>", line 3, in __setattr__
NotImplementedError
>>>
>>> foo.bar = 'still works'


See how it works? The lock method *dynamically* adds the attribute
foo._locked *after* initialization to the instance. Before the call
of foo.lock() foo._locked is a class attribute. Now you might argue
that one should better set foo._locked = False in the __init__ method
rather than as a class attribute. Something like:

class Foo(object) :
    def __init__(self) :
        self._locked = False

But no! The initialization would trigger
Foo.__setattr__(foo,'_locked',False)
which naturally runs into an attribute error since __setattr__ looks
up this
attribute. So this very same implementation is one of the pro examples
you
asked for :-)


cheers,

- harold -



From mgi820 at motorola.com  Thu Mar 15 13:20:25 2007
From: mgi820 at motorola.com (Gary Duzan)
Date: Thu, 15 Mar 2007 17:20:25 +0000 (UTC)
Subject: distributing python software in jar like fashion
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
Message-ID: <etbv8p$pg9$1@engnntp2.cig.mot.com>

In article <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d at comcast.com>, alf  <ask at me> wrote:
>Hi,
>
>I have a small app which consist of a few .py files. Is there any way to 
>distribute it in jar like fashion as a single file I can just run python 
>on. I obviously look for platform independent solution.
>
>Thx in advance, A.

   There is a new package that has been discussed here recently
called Squisher that should do what you want by packing things into
a single pyc file. There are still some minor issues that need to
be ironed out with running the pyc directly, but it should do
exactly what you want Real Soon Now.

http://groups.google.com/groups/search?q=group%3Acomp.lang.python+squisher&qt_s=Search

					Gary Duzan
					Motorola CHS




From scott.daniels at acm.org  Fri Mar  9 01:07:15 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Thu, 08 Mar 2007 22:07:15 -0800
Subject: Dyanmic import of a class
In-Reply-To: <1173391303.350661.120820@v33g2000cwv.googlegroups.com>
References: <1173388141.820852.98880@j27g2000cwj.googlegroups.com>
	<1173391303.350661.120820@v33g2000cwv.googlegroups.com>
Message-ID: <12v1uastjikkbd@corp.supernews.com>

   Arnaud Delobelle wrote:
> On Mar 8, 9:09 pm, "rh0dium" <steven.kl... at gmail.com> wrote:
> [snip]
>> for mod in listdir():
>>    __import__(mod)
>>    a=mod()
>>    a.dosomething()  # This is a function which each class shares.
>>
>> Can anyone help?
> 
> You are not using __import__ correctly.  Perhaps reading the doc would
> be a good start:
> http://docs.python.org/lib/built-in-funcs.html
> 
> For example to import the module defined in 'foo.py' you would do
> foo = __import__('foo')
> Then your class foo would be accessible as foo.foo

To get even more explicit:
     import glob, os.path
     for filename in glob.glob('*.py*'):
         modname, ext = os.path.splitext(filename)
         try:
             class_ = getattr(__import__(modname), modname)
         except (ImportError, AttributeError, SyntaxError), err:
	    print filename, modname, err
	else:
             class_().dosomething()

-- 
--Scott David Daniels
scott.daniels at acm.org


From DierkErdmann at mail.com  Fri Mar  2 08:59:35 2007
From: DierkErdmann at mail.com (DierkErdmann at mail.com)
Date: 2 Mar 2007 05:59:35 -0800
Subject: Sorting strings containing special characters (german 'Umlaute')
Message-ID: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>

Hi !

I know that this topic has been discussed in the past, but I could not
find a working solution for my problem: sorting (lists of) strings
containing special characters like "?", "?",... (german umlaute).
Consider the following list:
l = ["Aber", "Beere", "?rger"]

For sorting the letter "?" is supposed to be treated like "Ae",
therefore sorting this list should yield
l = ["Aber, "?rger", "Beere"]

I know about the module locale and its method strcoll(string1,
string2), but currently this does not work correctly for me. Consider
     >>> locale.strcoll("?rger", "Beere")
     1

Therefore "?rger" ist sorted after "Beere", which is not correct IMO.
Can someone help?

Btw: I'm using WinXP (german) and
>>> locale.getdefaultlocale()
prints
   ('de_DE', 'cp1252')

TIA.

  Dierk



From deets at nospam.web.de  Thu Mar  8 04:39:29 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Thu, 08 Mar 2007 10:39:29 +0100
Subject: Jython Data Extraction problem
References: <6gMHh.10662$Ih.388@trnddc02>
Message-ID: <55a3uhF23vc6oU1@mid.uni-berlin.de>

Steve Williams wrote:

> The data is an 8-byte 2s complement binary integer stored in a MSSQL
> 2005 CHAR column.  (COBOL did that, not me). I'm using zxJDBC to read
> the data and Jython to process.
> I could extract the integer if it wasn't returned in the resultset as
> unicode.  Things like ord(char) and struct.unpack('>B',char) to get at
> the bits don't seem to work.  struct.unpack('>g',string) is not available.
> I've tried fooling with charset in the url and the connect statement and
> tried encode, but I have no experience here.
> Is there anyway to get Jython/zxJDBC to stop converting the string to
> unicode?
> Any advice is welcome.

It's a JDBC-thing in the end, see if you find a solution there. Apart from
that, I don't see the problem really - why can't you just create a
byte-string by using the .encode-method? Sure, you need to know which
encoding was actually used when reading the bytes from the DB. But you
should be able to figure that out, there aren't too much candidates -
basically the usual suspects of cp1250, latin1 and the like.

Diez


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 05:13:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 07:13:09 -0300
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
Message-ID: <op.tow2n71ux6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 06:14:46 -0300, <dbhbarton at googlemail.com> escribi?:

> A '?' placed in the preceding whitespace of a line as a means of
> quickly highlighting a line or block of code for special attention.
> The interpreter simply ignores these characters, and executes the code
> as if each WIP character wasn't there. The value-added comes from how
> IDEs can exploit this to color the line or code block (in a
> customisable fashion as with other context-dependent IDE formatting).

This could be implemented without new syntax: just make your editor  
recognize some special comments, and apply the highlighting to the  
following block. By example,

		# XXX Remove this when FuruFaifa is fixed to always provide
		# XXX the names in the same order
		names.sort()
		names.reverse()

		if names==oldnames:
		    ...

would highlight the first 4 lines (let's say, up to the next blank line or  
dedent).

> 2. The HALT comment:
>
> A '!' at the start of a line, indicating the end of the script proper.
> The interpreter would register this one, and ignore everything after
> it, a bit like a sys.exit() call but also stopping it from picking
> syntax errors after the HALT. IDEs could then 'grey out' (or 'yellow
> out' or whatever) all following characters, including later HALT
> comments.

You accidentally type a ! somewhere, and your module stops working - not  
so good :( and worse, hard to find.

I sometimes use '''this string marks''' to ignore whole blocks of code. It  
works fine unless the block already contains the same kind of  
triple-quoted string...

> As far as I can see, neither of these would break backwards
> compatibility and, like the @ decorator, if you don't like it, you
> wouldn't have to use it. I don't know enough about the guts of Python
> to say much about ease of implementation, but it doesn't seem like it
> would be too hard.

The main problem with new syntax is breaking compatibility with older  
versions, and I doubt it's worth the pain just for highlighting or playing  
interactively, so you don't have a great chance of them being  
implemented...

-- 
Gabriel Genellina



From supervau at gmail.com  Tue Mar 27 17:09:54 2007
From: supervau at gmail.com (Frank)
Date: 27 Mar 2007 14:09:54 -0700
Subject: plotting R graphics with rpy: figure crashes
Message-ID: <1175029794.861002.121210@l77g2000hsb.googlegroups.com>

Hi,

I use rpy to plot functions and have the following problem. When I
execute the following code line by line (start python and then execute
line by line) the resulting figure looks as it should. However, when I
put these lines in a script and execute the script the figure appears
for half a second but then crashes. Using pylab.show() at the end of
the script prevents the crash but now the window is no longer
refreshed (e.g., changing the size of the window makes the contents
disappear).

import pylab
import rpy

x = range(0, 10)
y = [ 2*i for i in x ]
rpy.r.plot(x,y)

I compared already with sys.version if the python version is the same
in both cases (it is).  Hence, the problem might be caused by rpy.

Has anyone an idea how to figure that out?

Thanks!

Frank



From bthom at cs.hmc.edu  Thu Mar 22 22:01:27 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Thu, 22 Mar 2007 19:01:27 -0700
Subject: class / instance question
Message-ID: <96B6F7A8-E09A-433B-ACC8-EF90A66DBEC8@cs.hmc.edu>

Hello,

I'm hoping the Python community knows whether or not the following is  
possible, and if it is possible, how I would go about writing code to  
do this.

I've written two game classes---Nim and TicTacToe---where each  
derives from a Game class that I've created (it is essentially an  
abstract base class, where I've used an "abstract()" hack to somewhat  
enforce this).

I now want to be able to pass either of these classes into a game- 
playing engine, for instance a function

playGame(classOfGameToBePlayed) :

    # inside of which I create a new game using that class's constructor

Is this possible, and if so, how to approach it?

Thanks a lot,

--b


From gagsl-py2 at yahoo.com.ar  Mon Mar 26 14:07:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 Mar 2007 15:07:42 -0300
Subject: how to abort on syntax errors
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <op.tps5y4abx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 26 Mar 2007 14:21:22 -0300, Josh <noone at nowhere.com> escribi?:

> I have a lot of except Exception, e statements in my code, which poses  
> some
> problems.

*many* problems, I'd say. Don't do that :)

> One of the biggest is whenever I refactor even the triviallest
> thing in my code.
>
> I would like python to abort, almost as if it were a compile-time error,
> whenever it cannot find a function, or if I introduced a syntax error.  
> But,
> instead, it merrily proceeds on its way.

Because you have told Python to do so, using a catch-all except clause.  
Try to be as specific as possible.
Syntax errors, indentation errors and such can be caught just by compiling  
the module, even before you try to test it.

> Is there some idiom that you use in situations like these?

Avoid bare except clauses as much as you can.

-- 
Gabriel Genellina



From steve at REMOVE.THIS.cybersource.com.au  Fri Mar  9 21:58:59 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 10 Mar 2007 13:58:59 +1100
Subject: Unexpected behavior of list of list
References: <1173490209.398081.200420@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.10.02.58.58.686313@REMOVE.THIS.cybersource.com.au>

On Fri, 09 Mar 2007 17:30:09 -0800, kghose wrote:

> Hi,
> 
> The following code
> 
> listoflists = [[]]*2
> listoflists[0].append(1)
>
> appends(1) to both listoflists[0] and listoflists[1] (which I did not
> expect)

I think you will find the same question raised barely a few hours ago.

Hint:

>>> list_of_lists = [[]]*2
>>> id(list_of_lists[0])
-1211466452
>>> id(list_of_lists[1])
-1211466452

Notice that both inner lists have the same ID? That tells you that they
are the same list.

Like about what [obj]*2 does. Does it create multiple copies of obj? No it
does not. Python never makes copies of objects unless you explicitly tell
it to.

[] on it's own creates a new empty list, so [[], []] creates a list with
two DIFFERENT empty lists in it. [[]] creates a list with one empty list
in it; *2 makes a second reference (not a copy!) of that empty list.


> while
> 
> listoflists = [[]]*2
> listoflists[0] = [1]
> listoflists[0].append(2)
> 
> works as expected.i.e. only listoflists[0] gets 2 appended to it and
> any further operations work as expected.

>>> list_of_lists[0] = [] # creates a new empty list
>>> id(list_of_lists[0])
-1211466228
>>> id(list_of_lists[1]) # same ID as before
-1211466452




You know, now that Python has a warnings module, it would be really good
if list-of-lists*int raised a warning. Does anyone know if that's feasible
or possible? It needn't catch every imaginable Gotcha, just the common
case. I'm thinking something like this:

# pseudo-code
class list:
    def __mul__(self, count):
        for item in self:
            if isinstance(item, list):
                warn("this duplicates references, not copies")
                break
        ...do the rest




-- 
Steven.



From george.sakkis at gmail.com  Wed Mar  7 14:15:34 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Mar 2007 11:15:34 -0800
Subject: Debugging segmentation faults
Message-ID: <1173294934.182507.116790@h3g2000cwc.googlegroups.com>

I have a pure python program (no C extensions) that occasionally core
dumps in a non-reproducible way. The program is started by a (non-
python) cgi script when a form is submitted. It involves running a
bunch of other programs through subprocess in multiple threads and
writing its output in several files. So the only suspicious parts I
can think of is subprocess and/or multithreading. For the
multithreading part I'm using a modified version of threadpool.py
(http://www.chrisarndt.de/en/software/python/threadpool/), which is
built on top of the threading and Queue stdlib modules. Whatever bugs
may linger there, I'd hope that they would show up as normal Python
exceptions instead of segfaults.

All I have now is a few not particularly insightful core files (actual
path names and args changed for privacy):

/home/gsakkis/foo>gdb --core core.20140
GNU gdb Red Hat Linux (5.2-2)
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and
you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for
details.
This GDB was configured as "i386-redhat-linux".
Core was generated by `python2.5 /home/gsakkis/foo/foo.py --XXX --
max=30 --bar=/tmp/83840`
Program terminated with signal 11, Segmentation fault.
#0  0x080b222d in ?? ()
(gdb) backtrace
#0  0x080b222d in ?? ()
#1  0x080b28d1 in ?? ()
#2  0x080fa8ab in ?? ()
#3  0x0805c918 in ?? ()
(...)
#28 0x080b310f in ?? ()
#29 0x080dbfdd in ?? ()
#30 0x40021fef in ?? ()

Any hints ?



From bdesth.quelquechose at free.quelquepart.fr  Sun Mar 11 13:48:49 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 11 Mar 2007 18:48:49 +0100
Subject: Python in a desktop environment
In-Reply-To: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
Message-ID: <45f438da$0$2327$426a34cc@news.free.fr>

David Cramer a ?crit :
> If you had an application that you were about to begin development on
> which you wanted to be cross platform (at least Mac and Windows),
> would you suggest using c++ and Python?
> 
> I'm asking because we were originally thinking about doing c# but
> after attending PyCon this year I'm reconsidering. We are already
> using Python for the website and I figure a c++ backend w/ a Python
> GUI may work really well, and would be pretty easy to port.
> 
> Any opinions?
> 
Yes : forget about the c++ backend.


From deets at nospam.web.de  Wed Mar 28 05:51:18 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 28 Mar 2007 11:51:18 +0200
Subject: XML Parsing
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
Message-ID: <56us4mF2a9rq7U1@mid.uni-berlin.de>

pyapplico at gmail.com wrote:

> I want to parse this XML file:
> 
> <?xml version="1.0" ?>
> 
> <text>
> 
> <text:one>
> <file>filename</file>
> <contents>
> Hello
> </contents>
> </text:one>
> 
> <text:two>
> <file>filename2</file>
> <contents>
> Hello2
> </contents>
> </text:two>
> 
> </text>
> 
> This XML will be in a file called filecreate.xml
> 
> As you might have guessed, I want to create files from this XML file
> contents, so how can I do this?
> What modules should I use? What options do I have? Where can I find
> tutorials? Will I be able to put
> this on the internet (on a googlepages server)?
> 
> Thanks in advance to everyone who helps me.
> And yes I have used Google but I am unsure what to use.

The above file is not valid XML. It misses a xmlns:text namespace
declaration. So you won't be able to parse it regardless of what parser you
use.

Diez


From arnodel at googlemail.com  Tue Mar 13 18:12:12 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 13 Mar 2007 15:12:12 -0700
Subject: Iterating across a filtered list
In-Reply-To: <mailman.5037.1173821479.32031.python-list@python.org>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<1173813714.767225.164790@q40g2000cwq.googlegroups.com>
	<7xird5ndey.fsf@ruckus.brouhaha.com>
	<1173817193.179354.235790@p15g2000hsd.googlegroups.com>
	<mailman.5037.1173821479.32031.python-list@python.org>
Message-ID: <1173823932.685855.241940@n76g2000hsh.googlegroups.com>

On Mar 13, 9:31 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 Mar 2007 17:19:53 -0300, Arnaud Delobelle  
> <arno... at googlemail.com> escribi?:
>
> > On Mar 13, 7:36 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>
> >> The re library caches the compiled regexp, I think.
>
> > That would surprise me.
> > How can re.search know that string.lower(search) is the same each
> > time?  Or else there is something that I misunderstand.
>
> It does.
>
> py> import re
> py> x = re.compile("ijk")
> py> y = re.compile("ijk")
> py> x is y
> True
>
> Both, separate calls, returned identical results. You can show the cache:

OK I didn't realise this.  But even so each time there is the cost of
looking up the regexp string in the cache dictionary.

--
Arnaud



From jonathan.wright at gmail.com  Tue Mar 27 17:38:50 2007
From: jonathan.wright at gmail.com (Jon)
Date: 27 Mar 2007 14:38:50 -0700
Subject: plot dendrogram with python
In-Reply-To: <1174987611.314883.150410@y80g2000hsf.googlegroups.com>
References: <1174987611.314883.150410@y80g2000hsf.googlegroups.com>
Message-ID: <1175031530.221840.199850@l77g2000hsb.googlegroups.com>

> does anyone know if there is a way to plot a dendrogram with python.
> Pylab or matplotlib do not provide such a function.

This makes a datafile for gnuplot using output from pycluster. I'd be
interested to see something like this added to pylab/matplotlib,
although I don't have time myself. Not very elegant, but someone can
probably transform it to the three line recursion which escapes me.

Best,

Jon


import Numeric
from Pycluster import treecluster
dist = Numeric.zeros((10,10),Numeric.Float)
for i in range(dist.shape[0]):
   dist[i:,i:]=i

tree , dist = treecluster(distancematrix=dist,method='a')


tree=tree.tolist()
base = []
line = []
names = range(dist.shape[0]+1)

def f(i,tree,names,spos):
   height=dist[spos]
   if i>=0:
      try:
         base.append(names[i])
      except:
         print i
      x=len(base)
      line.append((x,0))
      line.append((x,height))
      line.append(("#","#"))
   else:
      cluster = tree[-i-1]
      h1,x1=f(cluster[0],tree,names,-i-1)
      h2,x2=f(cluster[1],tree,names,-i-1)
      x=(x1+x2)/2.0
      if h1==h2:
         # tie
         line.append((x1,h1))
         line.append((x2,h2))
         line.append(("#","#"))
         line.append((x,height))
         line.append((x,h1))
         line.append(("#","#"))
      else:
         raise Exception("Whoops")
      tree[-i-1].append((x,h1))
   return height,x


h1,x1 = f(tree[-1][0],tree,names,len(tree)-1)
h2,x2 = f(tree[-1][1],tree,names,len(tree)-1)
x=(x1+x2)/2.0
height = dist[-1]
tree[-1].append((x,h1))
if h1==h2:
         # tie
         line.append((x1,h1))
         line.append((x2,h2))
         line.append(("#","#"))
         line.append((x,height))
         line.append((x,h1))
         line.append(("#","#"))
else:
         raise Exception("Whoops")

# print base

d=open("dend.dat","w")
# make a tree diagram
for point in line:
   if point[0]!="#":
      print >> d, point[0],point[1]
   else:
      print >> d
      print >> d

d.close()

#
# os.system("gnuplot")
# """plot "dend.dat" u 1:2 w l"""




From bill.tydeman at gmail.com  Sat Mar  3 08:08:00 2007
From: bill.tydeman at gmail.com (Bill Tydeman)
Date: Sat, 3 Mar 2007 08:08:00 -0500
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
In-Reply-To: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
References: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
Message-ID: <501e09e0703030508i6d92e313sa412d352c998564b@mail.gmail.com>

Just curious, but since the file size limitation on NTFS is 4 GB, have you
confirmed that it isn't some other part of the interaction that is causing
the problem?   What FS is hosting the files?

On 2 Mar 2007 10:09:15 -0800, paduffy at cisco.com <paduffy at cisco.com> wrote:
>
> Folks,
>
> I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
> Reading a file of 13 GBytes, one line at a time.  It appears that,
> once the read line passes the 4 GByte boundary, I am getting
> occasional random line concatenations.  Input file is confirmed good
> via UltraEdit.  Groovy version of the same app runs fine.
>
> Any ideas?
>
> Cheers
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
There is no reason for any individual to have a computer in his home.
        Ken Olsen, President, Digital Equipment, 1977
        US computer engineer & industrialist (1926 - )
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From skip at pobox.com  Fri Mar 23 09:02:02 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 23 Mar 2007 08:02:02 -0500
Subject: Cleanly exiting multi thread application on SIGINT
In-Reply-To: <1174653622.239148.185270@y80g2000hsf.googlegroups.com>
References: <1174653622.239148.185270@y80g2000hsf.googlegroups.com>
Message-ID: <17923.53194.182200.856085@montanaro.dyndns.org>


    Jon> Is the following the most elegant way to exit a multi-threaded
    Jon> application on a Ctrl-C?  I am a complete beginner and would have
    Jon> thought there was some way of doing it without having to use while
    Jon> 1: pass, but have yet to find a way.

I thought there was some sort of wait() method in the threading module, but
I was mistaken.  Maybe:

    while threading.activeCount():
        time.sleep(0.01)

?

Skip


From dbhbarton at googlemail.com  Fri Mar  9 08:48:35 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 05:48:35 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <55d34sF24ijrdU1@mid.individual.net>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
Message-ID: <1173448114.905480.47200@h3g2000cwc.googlegroups.com>

> Yes, it has. It says "disregard the following characters until EOL".
> If you remove it, the following code will be interpreted as ...
> code (and not be disregarded).

and ! would say "disregard the following characters until End Of
Program". Is it really so different?


> > Well I'm not a big fan of decorators so I know how you must feel.
>
> Mh, not sure -- why do you have decorators in mind? I don't dislike
> them.

Just because I remember reading similar aesthetic arguments against
the @ syntax- that it looked alien, messy, unpythonic and obfuscating.
I certainly agree with the latter point even if I find the former ones
a little hand-wavey for my tastes.


> I think it's much cleaner to have language and "fixme" levels
> separate. "fixme" features can then depend fully on the editor/IDE
> and don't have to be part of the source code (though they may).

That's certainly a solid ideological argument against the "WIP
character". Maybe I should just change my editor!

It sounds like other Python users *do* like to do the kind of things I
suggested, but seasoned users would rather rely on macros and features
of specific editors. Unfortunately, to a newbie like myself, these
seem like obscure 'tricks' to be mastered rather than simple built-in
conveniences that any newbie can profit from.

I suppose my ideology is that Python's greatest strength is (and focus
should be) its visual simplicity and ease of learning, making
programming more accessible to the masses. But hey I'm just a fresh-
faced conscript. I guess I've got to leave the battle planning to the
five-star generals on the hill!

Thanks for all the comments and the spirit of tolerance.

dave




From duncan.booth at invalid.invalid  Thu Mar  8 03:35:31 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Mar 2007 08:35:31 GMT
Subject: Is numeric keys of Python's dictionary automatically sorted?
References: <esn6nu$c8nt$1@netnews.upenn.edu>
	<mailman.4767.1173300898.32031.python-list@python.org>
Message-ID: <Xns98ED57683E6F7duncanbooth@127.0.0.1>

Carsten Haese <carsten at uniqsys.com> wrote:

> Here is a simple counterexample that breaks the ordering, at least for
> the version I'm running:
> 
>>>> d = {}
>>>> for i in range(0,6): d[10**i] = []
> ... 
>>>> d
> {100000: [], 1: [], 100: [], 1000: [], 10: [], 10000: []}

Here's another counterexample which shows that even dictionaries with 
the same consecutively numbered small integer keys can vary the order in 
which the keys are returned:

>>> d1 = dict.fromkeys([1,2])
>>> d2 = dict.fromkeys([9,1,2])
>>> del d2[9]
>>> d1
{1: None, 2: None}
>>> d2
{2: None, 1: None}

In current C-Python implementations, the hash code for an integer is 
simply the integer itself. That means there is a strong tendency for 
consecutive integers to be stored in consecutive slots in the 
dictionary. However as soon as you get gaps, or add the keys out of 
order, there is a opportunity for higher valued keys to displace lower 
valued keys into a different slot.

If you want the keys sorted then sort them.


From socialanxiety at gmail.com  Sat Mar  3 18:53:45 2007
From: socialanxiety at gmail.com (socialanxiety at gmail.com)
Date: 3 Mar 2007 15:53:45 -0800
Subject: logging into forms on an ssl server using python
Message-ID: <1172966025.124339.163860@p10g2000cwp.googlegroups.com>

Hi, I need some help, I'm trying to create a script that will fill in
the forms on an ssl website, and submit them. Could anyone help me
out, examples would be  nice.
Thanks in advance



From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 18:28:45 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 09:28:45 +1100
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
Message-ID: <pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 22:53:55 +0100, Marcin Ciura wrote:

> Given
>    class Node(object):
>        pass
> 
>    node = Node()
>    nextnode = Node()
> 
> I tried to refactor the following piece of code
>    node.next = nextnode
>    node = nextnode
> 
> as
>    node = node.next = nextnode
> 
> only to discover that Python performs chained assignments
> backwards compared to other languages, i.e. left-to-right
> instead of right-to-left. From the user's perspective,
> I can't think of any reasonable argument for keeping it
> this way in Python 3000. What is your opinion?

Well, this user's perspective is that if I read from left to right, which
I do, then I expect most operations to also go from left to right, and not
from right to left.

Assignment is one exception to that. If I say "x = y = z" then I expect
that afterwards x and y and z should all have the same value.

>>> x, y, z = 1, 2, 3
>>> x, y, z
(1, 2, 3)
>>> x = y = z
>>> x, y, z
(3, 3, 3)

I certainly wouldn't expect to get (2, 3, 3).



-- 
Steven.



From markg85 at gmail.com  Tue Mar 13 11:04:05 2007
From: markg85 at gmail.com (Mark)
Date: Tue, 13 Mar 2007 16:04:05 +0100
Subject: i can`t get python working on the command line (linux)
Message-ID: <6e24a8e80703130804y7a88f1b0wf7ed30e98d6a35f7@mail.gmail.com>

Hey,

first of all: sorry for the 100% n00b question
i`m brand new to python and i seem to start off with the biggest problem of
all.. not even getting python to work.
i`m running Fedora core 7 test 2 and all the python based applications are
working fine (like pirut, pipet, and some other yum related tools)

but when i try to run this script:

#!/usr/bin/python
#
# python script tel.py
# gevonden door Jan Mooij 24 september 2000
#
from sys import *
from string import *

     # Create an empty dictionary.
count = {}

for line in open(argv[1], 'r').readlines():
    for word in split(line):
        if count.has_key(word):
            count[word] = count[word] + 1
        else:
            count[word] = 1
words = count.keys()
words.sort()
for word in words:
    print "%15s\t%10d" % (word, count[word])


and i`ve put it in tel.py (just the same as in the sample) than chmod
it to 777 (just to make sure it isn`t a permission issue) and than i
run it with: ./tel.py
now this is the error that i get:

Traceback (most recent call last):
  File "./tel.py", line 12, in <module>
    for line in open(argv[1], 'r').readlines():
IndexError: list index out of range

also i`m not even getting the most simple sample code to work.. "Hello World".
everything works fine when i first enter the python console by typing
python. than i have the  >>> things
than print "Hello World" gives me the expected result but that`s not
what i want.. i want to do it from a file..

the solution is probable extremely simple but i have no idea as a
complete n00b in python. i do have alot php experience.
hope someone could help me out with this.

o and any function that i use in python gives me "command not found:
print/whatever function i use"
(probable just a simple yum install command that i need to do to get
this working.. just try to figure that out with no python knowledge)

Thanx alot in favor.
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From thinker at branda.to  Wed Mar 21 16:31:26 2007
From: thinker at branda.to (Thinker)
Date: Thu, 22 Mar 2007 04:31:26 +0800
Subject: Make variable global
In-Reply-To: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
References: <1174506941.618827.48450@l75g2000hse.googlegroups.com>
Message-ID: <4601961E.2070303@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

abcd wrote:
> I have a file, "a.py"
>
> blah = None def go(): global blah blah = 5
>
>> From the python interpreter I try....
>
>>>> from a import * blah go() blah
>>>>
>
> ...i was hoping to see "5" get printed out the second time I
> displayed blah, but it doesn't. Now, if I type this same code
> directly into the python interpreter it works as i was hoping.
> what i am missing?
>
> thanks
>
"import" imports bindings between symbols and objects into
the module from another one. When you call a function in another
module, it changes global space of module where it is defined.
The global space of the module, where caller is in, is kept from touched
except accessing through module names.

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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From Ingo.Wolf at gmx.de  Wed Mar  7 05:05:16 2007
From: Ingo.Wolf at gmx.de (iwl)
Date: 7 Mar 2007 02:05:16 -0800
Subject: askstring Window to the top under Windows
In-Reply-To: <mailman.4732.1173231681.32031.python-list@python.org>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
	<mailman.4732.1173231681.32031.python-list@python.org>
Message-ID: <1173261916.618914.69130@8g2000cwh.googlegroups.com>

On 7 Mrz., 02:49, jim-on-linux <inq1... at verizon.net> wrote:
> On Tuesday 06 March 2007 08:13, iwl wrote:
>
> > Hi,
>
> > I tryed askstring to input some text in my
> > script, but some ugly empty Window appears with
> > the Input-Window behind and all together behind
> > my Console showing my script. So all have to
> > brought to the top first by the user - very
> > unconfortable
>
> By default
> tk will open a root window.

Is this default changeable befor askstring?



From pecora at anvil.nrl.navy.mil  Fri Mar  9 11:18:47 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Fri, 09 Mar 2007 11:18:47 -0500
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<pan.2007.03.09.15.33.01.991831@gmx.net>
Message-ID: <pecora-0239F9.11184709032007@ra.nrl.navy.mil>

In article <pan.2007.03.09.15.33.01.991831 at gmx.net>,
 Marc 'BlackJack' Rintsch <bj_666 at gmx.net> wrote:

> In <pecora-B92BB8.09304609032007 at ra.nrl.navy.mil>, Lou Pecora wrote:
> 
> > *In mod1.py
> > 
> > import mymodule
> > 
> > *In mod2.py
> > 
> > import mymodule
> > 
> > *In mod3.py
> > 
> > import mymodule as MM
> > 
> > Then mymodule is imported only once, but each module has access to it 
> > through the module name (mod1 and mod2) and the alias MM (mod3).  Is 
> > that right?
> 
> Yes, that's correct.
> 
> Ciao,
> 	Marc 'BlackJack' Rintsch

Thank you.

A further confusion (if I may):

I have noticed that using from xxx import * can lead to problems when 
trying to access variables in the xxx module.

E.g.

-- File f2.py

imvar=1

def prn():
   print imvar

-- File junk.py

from f2 import *
prn()
imvar=2
prn()

-- Running junk.py gives the output:

1
1

Not what I would expect which is,

1
2

Namespaces get confusing.  I have begun to switch to using 'import f2 
as' which gives the 2nd expected result. Safer, but still a bit puzzling.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From MonkeeSage at gmail.com  Mon Mar 12 08:40:44 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 12 Mar 2007 05:40:44 -0700
Subject: Single string print statements on multiple lines.
In-Reply-To: <55kv29F24oq26U1@mid.uni-berlin.de>
References: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
	<55kv29F24oq26U1@mid.uni-berlin.de>
Message-ID: <1173703244.814332.63850@64g2000cwx.googlegroups.com>

HeEm wrote:
> In my 100 level CS course, I was asked to create multiple lines of
> output within a single string.  Of course I know how to:

If this is for a CS course, you shouldn't really be cheating and
asking for an answer here, should you? I mean, the whole point of
taking (and paying for!) a CS course is to learn CS, right? But like
Diez said, the standard C escapes work in python: \t = TAB, \r =
CARRIAGERETURN, \n = NEWLINE/LINEFEED, &c.

Regards,
Jordan



From deets at nospam.web.de  Tue Mar 20 03:58:25 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 Mar 2007 08:58:25 +0100
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>
	<56863eF27p5bmU1@mid.uni-berlin.de>
	<WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>
Message-ID: <569ih4F27o9bdU1@mid.uni-berlin.de>

> 
>    What MDBtools did you install?  The RPM, a checkout from CVS,
> or the downloadable distribution?  They're all different.


The one that comes with ubuntu edgy. Just


apt-get install mdbtools

or something, that's it.

I don't want to start a distro war here - but I always found the 
RPM-based distros lacking, to say the least.

Diez


From sgeiger at ncee.net  Sat Mar 24 09:02:23 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Sat, 24 Mar 2007 08:02:23 -0500
Subject: Join strings - very simple Q.
In-Reply-To: <1174739951.358958.245240@o5g2000hsb.googlegroups.com>
References: <1174675011.244339@jubilee.claranet.pt>	<1174676818.207543.246080@l75g2000hse.googlegroups.com>	<1174678166.970277@jubilee.claranet.pt>	<1174737587.638835.137070@y80g2000hsf.googlegroups.com>
	<1174739951.358958.245240@o5g2000hsb.googlegroups.com>
Message-ID: <4605215F.8090108@ncee.net>

import string

def test_join(l):
    print "Joining with commas:                     ",  string.join(l,',')
    print "Joining with empty string:               ",  string.join(l,'')
    print "Joining same way, using another syntax:  ",  ''.join(l)
    print "Joining with the letter X:               ",  'X'.join(l)
    print "Joining with <->                         ",  '<->'.join(l)

l = ['a','b','c']

test_join(l)


"""
Example output:

Joining with commas:                      a,b,c
Joining with empty string:                abc
Joining same way, using another syntax:   abc
Joining with the letter X:                aXbXc
Joining with <->                          a<->b<->c

"""






Dustan wrote:
> On Mar 24, 5:59 am, "Dustan" <DustanGro... at gmail.com> wrote:
>   
>> On Mar 23, 1:30 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>>
>>     
>>> Mike Kent escreveu:
>>> ...
>>>       
>>>> New way:
>>>> l=['a','b','c']
>>>> jl=','.join(l)
>>>>         
>>> I thank you all.
>>>       
>>> Almost there ...
>>> I tried "".join(l,',') but no success ... :-(
>>>       
>>> Paulo
>>>       
>> Perhaps you're doing it wrong, despite having an example right in
>> front of you?
>>
>> Side by side comparison:
>> jl=string.join(l,',')
>> jl=','.join(l)
>>
>> The sequence is passed as an argument to the join method, and the
>> delimiter is the string whose method is being called.
>>     
>
> To further demonstrate (because I got a weird email that seemed to
> think that my code didn't work):
>
>   
>>>> import string
>>>> l = ['a','b','c']
>>>> string.join(l,',')
>>>>         
> 'a,b,c'
>   
>>>> ','.join(l)
>>>>         
> 'a,b,c'
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From deets at nospam.web.de  Tue Mar 27 17:49:11 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 Mar 2007 23:49:11 +0200
Subject: Please help!! SAXParseException: not well-formed (invalid token)
In-Reply-To: <1175015481.265701.206970@d57g2000hsg.googlegroups.com>
References: <1175007585.758109.127490@r56g2000hsd.googlegroups.com>
	<56sqr5F29auttU1@mid.uni-berlin.de>
	<1175015481.265701.206970@d57g2000hsg.googlegroups.com>
Message-ID: <56thr2F28t97kU2@mid.uni-berlin.de>

jvictor118 at yahoo.fr schrieb:
> I checked the file format (of the file containing the n-tilde - ?) and
> it is indeed UTF-8! I'm baffled! Any ideas?

Without you showing us your actual code and data - no. Because it works 
for me and a lot of other people.


Diez


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 13 04:38:20 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 09:38:20 +0100
Subject: Starting Python... some questions
In-Reply-To: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
References: <1173760751.798442.300550@s48g2000cws.googlegroups.com>
Message-ID: <45f662f3$0$15552$426a74cc@news.free.fr>

jezonthenet at yahoo.com a ?crit :
> I started using Python a couple of days ago - here are a few
> questions:
> 
> * Doesn't the __main__() method automatically execute when I run my
> python program?

Which "__main__" method ???

Anyway, the answer is no. Every code at the top-level (which includes 
import, class and def statements...) is executed when the module is 
first loaded - whether as a proper module (ie: imported from somewhere 
else) or as a main program (ie-> python mymodule.py). In the first case, 
the special variable __name__ is set to the module's name, in the second 
to '__main__'. So you can rely on this to have code executed when the 
module is used as a program. The usual idiom is

# mymodule.py
(imports here)
(classes and defs here)

def main(argv):
   (code of main function here)
   return 0

if __name__ == '__main__':
   import sys
   sys.exit(main(sys.argv))


> * Only when I do an import of my test.py file within python and then
> run test.__main__() 

BTW, you should *not* use names with 2 leadings and 2 trailing 
underscores. These names are reserved for Python implementation stuff.

> I can see where my bugs are. Is this correct?

Nope. You can also spot bugs by reading the code or running it thru the 
debugger !-)

More seriously : using the above idiom (or any variant of - the 
important part being the conditional on __name__ == '__main__'), you can 
just
$ python mymodule.py

to run your program.

> (right now this is my only way of running my python program and see
> where I have problems)

> * Once I've done an import and then I wish to make a change to the
> file I've imported I have to quit Python, restart and import that
> module again in order for the module to be refreshed. Is there no "re-
> import" ?

reload(module_object)

But it's of very limited use. The best thing to do is usually to have a 
simple test file that setup the desired state (imports etc) that you 
execute after each change, passing the -i option to the python 
interpreter (this will leave the interpreter in interactive mode after 
execution of the test file, so you can inspect your objects, test things 
etc).

> * Finally, could someone tell me why I'm having problems with the
> small module below?
>   - Python pretends I provide chassis_id() with three parameters, even
> though I clearly only provide it with two - why?

Without even reading the code, I can tell you it's an instance or 
classmethod with either a wrong declaration or wrongly called.

> 
> #!/usr/bin/python
> import scapy
> import struct
> 
> class lldp_class:

Do yourself a favor: use new-style classes. Also, it would be better to 
stick to usual naming conventions (Python relies heavily on conventions):
http://www.python.org/dev/peps/pep-0008/

   class Lldp(object):

> 	def __init__(self):
> 		self.chassis_id_tlv = None
> 
> 	def chassis_id(subtype, chassis_info):

Bingo. You need to have self as the first argument. The instance is 
passed as the first argument of a method.

         def chassis_id(self, subtype, chassis_info):

> 		if subtype == 4:
> 			chassis_data = struct.pack("!B",chassis_info)
> 		subtype_data = struct.pack("!B",subtype)
> 		self.chassis_id_tlv = subtype_data + chassis_data
> 
> def __main__():


   def main():

> 	p = lldp_class()
> 	p.chassis_id(4, "01:80:C2:00:00:0E")

For the record: this is interpreted as:
         lldp_class.chassis_id(p, 4, "01:80:C2:00:00:0E")


> 	payload = p.chassis_id_tlv
> 	ether = scapy.Ether(dst="01:02:03:04:05:06")
> 	fullpayload = ether + payload
> 	sendp(fullpayload)
> 

if __name__ == '__main__':
     main()

As a side note, it looks like there are a couple point where your design 
may be improved. Like passing subtype and chassis_info to the __init__ 
of your class.

HTH


From steve at holdenweb.com  Thu Mar 15 23:13:01 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 15 Mar 2007 23:13:01 -0400
Subject: problem with str()
In-Reply-To: <1hv191c.1bj9j73fp25ldN%aleax@mac.com>
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>	<mailman.5149.1173990948.32031.python-list@python.org>	<1173992205.985657.167970@y66g2000hsf.googlegroups.com>	<mailman.5154.1173999970.32031.python-list@python.org>
	<1hv191c.1bj9j73fp25ldN%aleax@mac.com>
Message-ID: <etd22m$2gt$1@sea.gmane.org>

Alex Martelli wrote:
> Steve Holden <steve at holdenweb.com> wrote:
> 
>> 7stud wrote:
>>> Sheesh! You would think that after looking at every inch of the code
>>> for way too many hours, at some point that would have poked me in the
>>> eye.
>>>
>>> Thanks all.
>>>
>> Get yourself a stuffed bear, and next time you have this kind of problem
>> spend a few minutes explaining to the bear exactly how your program 
>> can't possibly be wrong. Works like a charm.
> 
> A rubber ducky works much better for that, btw -- more easily washable
> than a stuffed bear, for example.
> 
But stuffed bears are so much more knowledgeable about the minutiae of 
software design.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From kibleur.christophe at gmail.com  Fri Mar  2 20:11:00 2007
From: kibleur.christophe at gmail.com (Tool69)
Date: 2 Mar 2007 17:11:00 -0800
Subject: cyclic iterators ?
Message-ID: <1172884260.852007.122260@64g2000cwx.googlegroups.com>

Hi,

Let say I've got a simple list like my_list = [ 'a', ',b', 'c' ].
We can have an iterator from it by k =  iter( my_list), then we can
access each of her (his ?) element by k.next(), etc.

Now, I just wanted k to have the following cyclic behaviour (without
rising the ) :

>> k.next()
'a'
>> k.next()
'b'
>> k.next()
'c'
>> k.next()     -> not raising StopIteration error
'a'
>> k.next()
'b'
etc.

I've tried something like this to have a cyclic iterator without
sucess:

def iterate_mylist(my_list):
    k = len((my_list)
    i=0
    while i <= k :
        yield my_list[i]
        i += 1
    i = 0
    yield my_list[0]

I missed something, but I don't know what exactly.
Thanks.



From gigs at hi.t-com.hr  Sun Mar 18 11:49:28 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Sun, 18 Mar 2007 16:49:28 +0100
Subject: tkinter grid vs pack
Message-ID: <eth2n4$c7d$1@ss408.t-com.hr>

For what is grid better than pack, and otherwise?

thanks in advance


From steve at REMOVEME.cybersource.com.au  Thu Mar 22 03:22:07 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 18:22:07 +1100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1tkMh.115$mG4.94@newsfe12.lga>
	<1174543186.407031.165640@l77g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.22.07.22.06.278835@REMOVEME.cybersource.com.au>

On Wed, 21 Mar 2007 22:59:46 -0700, flit wrote:

> Going back in the beginning I said :
> 
>  "So PLEASE, don't try to convince me about the social / economical /
> open source / give to all / be open / all people are honest until
> prove contrary / dance with the rabbits... "

I have done NONE of that.

I've just pointed out, time and time again, that you haven't asked a
meaningful question.

Even after all these posts, still won't tell us what you are trying to
protect against. People copying your program? Competitors infringing your
patents? Your "corrupt and "bad" government (your words) infringing your
moral rights as an author? Your customer editing your program and breaking
it? Who knows? I don't. I wonder whether even you do.

You keep asking for a technical solution, even if a technical solution
is not appropriate, but you won't tell us what the problem is. Tell us the
threat you want to protect against, and we'll suggest meaningful solutions.


-- 
Steven D'Aprano 



From deets at nospam.web.de  Tue Mar 27 10:49:24 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 Mar 2007 16:49:24 +0200
Subject: Help in Placing Object in Memory
References: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
Message-ID: <56sp7kF2b0fj6U1@mid.uni-berlin.de>

Clement wrote:

> I am newbie to Python...... i want to know something..........
> 
> can i place an object in disk instead of placing in Main Memory...? 
> If possible, can you please explain with some scripts...?

See the module pickle and it's examples.

> can two python script share a common object....?

What do you mean by that? They can both load a pickled object, yes. But they
can't share it as a at-runtime object, where changes in one script are
immediately are known to the other.

To do such a thing, look at pyro.

Diez


From gagsl-py2 at yahoo.com.ar  Sun Mar 18 20:54:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 Mar 2007 21:54:08 -0300
Subject: Private data
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.12.06.32.760433@REMOVE.THIS.cybersource.com.au>
	<1174220701.206419.77780@e65g2000hsc.googlegroups.com>
	<1174224087.024303.102130@n59g2000hsh.googlegroups.com>
Message-ID: <op.tpevgioyx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 18 Mar 2007 10:21:27 -0300, Dustan <DustanGroups at gmail.com>  
escribi?:

>>>> dis.dis(testPrivateStaticFunctionVariables)
>  21           0 LOAD_DEREF               0 (func)
>               3 LOAD_DEREF               1 (internalData)
>               6 LOAD_FAST                0 (args)
>               9 CALL_FUNCTION_VAR        1
>              12 RETURN_VALUE
>
> What's the difference between 'LOAD_DEREF', 'LOAD_FAST', and
> 'LOAD_CONST', and, as seen at http://docs.python.org/lib/module-dis.html,
> 'LOAD_GLOBAL'? I can imagine that 'LOAD_GLOBAL' loads a global, but
> seeing as python is such a dynamic language, how exactly is it
> supposed to distinguish between them?

The Python interpreter executes a stack-based machine. Look at  
Python/compile.c for the code generation and Python/ceval.c for the code  
execution.
LOAD_CONST pushes a constant onto the stack (all constants are previously  
built and stored as attribute co_consts of the code object). LOAD_FAST and  
LOAD_GLOBAL pushes a local or global variable reference. (The compiler  
knows whether a name is local or not, just by lexical analysis).  
LOAD_DEREF appears to be used for accessing variables inside closures, I'm  
not sure.

> I don't understand the following at all: 'DUP_TOP', 'ROT_TWO'. Any
> pointers?

They manipulate the stack. DUP_TOP duplicates the top entry; ROT_TWO swaps  
the two top entries.

> What does 'INPLACE_ADD' mean, if not in place addition, and if it is
> in place addition, why does it need to 'STORE_ATTR' afterward?

That corresponds to A += B. The compiler can't know if A has or not an  
__iadd__ method; even if A implements __iadd__, that method could return a  
different object, not always A (it *may* try to do the operation inplace,  
but that might not always be possible). When the inplace method is not  
implemented, __add__ is used (so effectively A += B is computed as A = A+B)

-- 
Gabriel Genellina



From sjmachin at lexicon.net  Fri Mar 23 22:29:52 2007
From: sjmachin at lexicon.net (John Machin)
Date: 23 Mar 2007 19:29:52 -0700
Subject: except clause appears to be being skipped?
In-Reply-To: <1174701061.474974.97710@y80g2000hsf.googlegroups.com>
References: <1174701061.474974.97710@y80g2000hsf.googlegroups.com>
Message-ID: <1174703392.857810.62030@n59g2000hsh.googlegroups.com>

On Mar 24, 12:51 pm, AWasile... at gmail.com wrote:
[snip]
>         def pager(self,dex):
>         #Input page filename, Output pagetitle and the HTML output
>                 #Find out if the file requested actually exists
>                 try:
>                         j = dex + ".html"
>                         textfile = open("pages/" + j, "r")
>                 #If not 404' it
>                 except:
>                         self.err404(dex)
>
>                 #The first line in the .html files is the title, this reads that one
> line
>                 pagetitle = textfile.readline()
>
[snip]

>   File "/home2/awasilenko/webapps/cp/html.py", line 25, in pager
>     pagetitle = textfile.readline()
> UnboundLocalError: local variable 'textfile' referenced before
> assignment
>
> I know the except is being executed because I put a break in there for
> testing purposes and it did break, but as for why its not pulling up
> the 404 function and returning the error page, I have no idea.

It *is* "pulling up the 404 function", which *is* returning your error
page. However all your except clause does is "self.err404(dex)" -- you
ignore the return value, and fall out of the except clause with
textfile undefined, with the expected consequences.

I'm not at all familiar with cherrypy, but you probably need to do
either:
    errpage = self.err404(dex)
    dosomethingwith(errpage, dex)
    return
or simply:
    return "404 page title", self.err404(dex)
[Actually it would be better style if the err404 method returned a
tuple of (pagetitle, pagebody), then your except clause contains
only:
    return self.err404(dex)

The main point being to return instead of falling through the bottom
of the except clause. BTW, you should not use a bare except. Be a
little more specific, like except IOError:

Looking at the cherrypy docs would seem indicated. AFAIK there was a
v1 and a v2 with different naming conventions and there's now a v3 --
do ensure that you mention which version you are using if you need to
come back with more questions.

HTH,
John



From codecraig at gmail.com  Thu Mar 15 10:49:28 2007
From: codecraig at gmail.com (abcd)
Date: 15 Mar 2007 07:49:28 -0700
Subject: wxTextCtrl - copy and paste 65,
	000 characters of text into it only seems to hold 30, 003
Message-ID: <1173970168.287858.277380@l77g2000hsb.googlegroups.com>

I have a wxTextCtrl:

wx.TextCtrl(self.myPanel, -1, "", style=wx.TE_MULTILINE)

I take a set of text (65,000 characters), and paste it into the text
control.  all looks well.  Then when I click a button I print out the
entered text and the length of that text.  Here is what I am seeing...

1. Paste in text (65,000 characters)
2. Click button
3. Output on screen shows that the message length (i.e. len(msg)) is
30003  (strange since it should be 65000)
4. Select all text in the text control and hit delete.  The text
control should now be empty.
5. Paste in text (65,000 characters)
6. Click Button
7. Output on screen shows that the message length (i.e. len(msg)) is
65000 (as expected).

Any idea why the first time it gives me 30003, but on subsequent
attempts I get 65000?

Thanks



From S.Mientki-nospam at mailbox.kun.nl  Sun Mar 11 09:21:24 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sun, 11 Mar 2007 14:21:24 +0100
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <mailman.4938.1173618615.32031.python-list@python.org>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com><1173595945.530722.273030@30g2000cwc.googlegroups.com><000a01c763c0$6863a560$2102fea9@Guides.local>	<op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<mailman.4938.1173618615.32031.python-list@python.org>
Message-ID: <265da$45f40233$d443bb3a$4271@news.speedlinq.nl>

> 
> The problem is, how do I figure out how many spaces represent a tab? In one
> case, someone could have their editor configured to allow tabs to use 3
> spaces and the user could intermingle tabs and spaces. In other cases, a
> user might have their editor configured to have a tab equal 8 spaces yet
> also intermingle tabs and spaces. When a human looks at the document it is
> obvious the setting but how can I make it obvious to my program?  
then statistics can do it too.


-- 
cheers,
Stef Mientki
http://pic.flappie.nl


From pavlovevidence at gmail.com  Mon Mar 26 11:45:46 2007
From: pavlovevidence at gmail.com (Carl Banks)
Date: 26 Mar 2007 08:45:46 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <mailman.5628.1174916538.32031.python-list@python.org>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
Message-ID: <1174923946.011579.262980@p15g2000hsd.googlegroups.com>

On Mar 26, 9:42 am, Jean-Paul Calderone <exar... at divmod.com> wrote:
> On 26 Mar 2007 06:20:32 -0700, "Noma... at gmail.com" <noma... at gmail.com> wrote:
>
> >OK...
> >I've been told that Both Fortran and Python are easy to read, and are
>
> Python is hugely easier to read.
>
> >quite useful in creating scientific apps for the number crunching, but
> >then Python is a tad slower than Fortran because of its a high level
>
> Fortran is massively faster than Python.
>
> >language nature, so what are the advantages of using Python for
> >creating number crunching apps over Fortran??
>
> You can get the speed of fortran in Python by using libraries like
> Numeric without losing the readability of Python.

This is true only for problems that can take advantage of scalability,
which is a large and important subset of all numerical problems, but
is still only a subset.

Some problems (e.g., simulation) require repeated sequential
evaluation of formulas.  For other problems (e.g., collision
detection) the operands change rapidly.  The scalability of numpy
doesn't help so much here.

(Anecdote: I once did a collision detection using Numeric.  It would
take slices out of the data set as it narrowed down the possible
collisions.  It actually worked pretty well.  But the slicing was
crazy and hard to follow.  I rewrote it in C and it was both faster
and more readable.)


Carl Banks



From gigs at hi.t-com.hr  Tue Mar 27 07:29:25 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 27 Mar 2007 13:29:25 +0200
Subject: tkinter MVC
Message-ID: <euav6p$eii$1@ss408.t-com.hr>

Can someone give me example how to write text editor in tkintter with 
model-view-controler?
What goes to controler and what goes to model?



thanks in advance


From jstroud at mbi.ucla.edu  Thu Mar 29 19:41:21 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 29 Mar 2007 16:41:21 -0700
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
Message-ID: <euhir1$ksq$1@daisy.noc.ucla.edu>

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From superprad at gmail.com  Wed Mar 21 14:42:29 2007
From: superprad at gmail.com (PKKR)
Date: 21 Mar 2007 11:42:29 -0700
Subject: parsing combination strings
Message-ID: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>

I need a fast and efficient way to parse a combination string(digits +
chars)

ex: s = "12ABA" or "1ACD" or "123CSD" etc

I want to parse the the above string such that i can grab only the
first digits and ignore the rest of the chacters,

so if i have s = "12ABA" , parser(s) should give me "12" or "1" or
"123".

I can think of a quick dirty way by checking each element in the
string and do a 'str.isdigit()' and stop once its not a digit, but
appreciate any eligent way.



From mail at timgolden.me.uk  Tue Mar 27 13:42:36 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Tue, 27 Mar 2007 18:42:36 +0100
Subject: Auto execute python in USB flash disk
In-Reply-To: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
Message-ID: <4609578C.5040601@timgolden.me.uk>

Brian Erhard wrote:
> Is there
> a way to auto execute a python script after a user double clicks to
> open a folder on the USB drive? How can you capture that double click
> event on a specific folder?

That would depend on what desktop / Operating System you're
using. If it's Windows, you need a shell extension (which
is non-trivial to understand and write). If it's one of the
Linux desktops, someone else had better chip in!

TJG


From radek.svarz at gmail.com  Mon Mar 26 13:29:58 2007
From: radek.svarz at gmail.com (Radek)
Date: 26 Mar 2007 10:29:58 -0700
Subject: fetch html page via isa proxy
Message-ID: <1174930197.366764.102320@y66g2000hsf.googlegroups.com>

Hi,

I have been trying several days to get the html page of www.python.org
when behind the corporate MS isa proxy.

I have tried setting http_proxy environment, played with proxy
openers, use ntlm proxy server all without success.

I can get the page using Firefox and IE with proxy settings.

As the last resort I started to play with pywin32 win32inet, but even
the test_win32inet.py does not get there.

Any advice? Or better working example?

Thanks a lot,

Radek



From aspineux at gmail.com  Thu Mar 29 10:34:47 2007
From: aspineux at gmail.com (aspineux)
Date: 29 Mar 2007 07:34:47 -0700
Subject: A nice way to use regex for complicate parsing
Message-ID: <1175178887.494344.313070@d57g2000hsg.googlegroups.com>


My goal is to write a parser for these imaginary string from the SMTP
protocol, regarding RFC 821 and 1869.
I'm a little flexible with the BNF from these RFC :-)
Any comment ?

tests=[ 'MAIL FROM:<john.smith at address.com>',
        'MAIL FROM:john.smith at address.com',
        'MAIL FROM:<john.smith at address.com> SIZE=1234
OTHER=foo at bar.com',
        'MAIL FROM:john.smith at address.com SIZE=1234
OTHER=foo at bar.com',
        'MAIL FROM:<"this at is.a> legal=email"@address.com>',
        'MAIL FROM:"this at is.a> legal=email"@address.com',
        'MAIL FROM:<"this at is.a> legal=email"@address.com> SIZE=1234
OTHER=foo at bar.com',
        'MAIL FROM:"this at is.a> legal=email"@address.com SIZE=1234
OTHER=foo at bar.com',
]

def RN(name, regex):
	"""protect using () and give an optional name to a regex"""
	if name:
		return r'(?P<%s>%s)' % (name, regex)
	else:
		return r'(?:%s)' % regex


regex={}

# <dotnum> ::= <snum> "." <snum> "." <snum> "." <snum>
regex['dotnum']=RN(None, r'[012]?\d?\d\.[012]?\d?\d\.[012]?\d?\d\.
[012]?\d?\d' % regex)
# <dot-string> ::= <string> | <string> "." <dot-string>
regex['dot_string']=RN(None, r'[a-zA-Z0-9]+(?:\.[a-zA-Z0-9]+)*' %
regex)
# <domain> ::=  <element> | <element> "." <domain>
regex['domain']=RN('domain', r'%(dotnum)s|%(dot_string)s' % regex)
# <q> ::= any one of the 128 ASCII characters except <CR>, <LF>, quote
("), or backslash (\)
regex['q']=RN(None, r'[^\n\r"\\]' % regex)
# <x> ::= any one of the 128 ASCII characters (no exceptions)
regex['x']=RN(None, r'.' % regex)
# <qtext> ::=  "\" <x> | "\" <x> <qtext> | <q> | <q> <qtext>
regex['qtext']=RN(None, r'(?:\\%(x)s|%(q)s)+' % regex)
# <quoted-string> ::=  """ <qtext> """
regex['quoted_string']=RN('quoted_string', r'"%(qtext)s"' % regex)
# <local-part> ::= <dot-string> | <quoted-string>
regex['local_part']=RN('local_part', r'%(quoted_string)s|%
(dot_string)s' % regex)
# <mailbox> ::= <local-part> "@" <domain>
regex['mailbox']=RN('mailbox', r'%(local_part)s@%(domain)s' % regex)
# <path> ::= "<" [ <a-d-l> ":" ] <mailbox> ">"
# also accept address without <>
regex['path']=RN('path', r'(?P<path_lt><)?%(mailbox)s(?(path_lt)>)' %
regex)
# esmtp-keyword    ::= (ALPHA / DIGIT) *(ALPHA / DIGIT / "-")
regex['esmtp_keyword']=RN(None, r'[a-zA-Z0-9][-a-zA-Z0-9]*' % regex)
# esmtp-value      ::= 1*<any CHAR excluding "=", SP, and all        ;
syntax and values depend on esmtp-keyword
#                      control characters (US ASCII 0-31inclusive)>
regex['esmtp_value']=RN(None, r'[^= \t\r\n\f\v]*' % regex)
# esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
regex['esmtp_parameter']=RN(None, r'%(esmtp_keyword)s(?:=%
(esmtp_value)s)?' % regex)
# esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
regex['esmtp_parameters']=RN('esmtp_parameters', r'%
(esmtp_parameter)s(?:\s+%(esmtp_parameter)s)+' % regex)
# esmtp-cmd        ::= inner-esmtp-cmd [SP esmtp-parameters] CR LF
regex['esmtp_addr']=RN('esmtp_addr', r'%(path)s(?:\s+%
(esmtp_parameters)s)?' % regex)

for t in tests:
	for keyword in [ 'MAIL FROM:', 'RCPT TO:' ]:
		keylen=len(keyword)
		if t[:keylen].upper()==keyword:
			t=t[keylen:]
	    	break

	match=re.match(regex['esmtp_addr'], t)
	if match:
		print 'MATCH local_part=%(local_part)s domain=%(domain)s
esmtp_parameters=%(esmtp_parameters)s' % match.groupdict()
	else:
		print 'DONT match', t



From sgeiger at ncee.net  Tue Mar 27 01:15:28 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 27 Mar 2007 00:15:28 -0500
Subject: enumerating processes
In-Reply-To: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>
References: <3abd07c80703262117k42bcdebdp9c160675fa42918f@mail.gmail.com>
Message-ID: <4608A870.5000302@ncee.net>

I believe you are looking for os.getpid()


??? wrote:
> hi ,all
>    any one knows how to enumerate the current running processes , or 
> how to obtain a specific process by its name or process id. I know I 
> can do this in many  programming languages , but how in python? any 
> one know?
>  Thanks for any guidance.
>
> -- 
> li xianmin
>
>            lixianmin at gmail.com <mailto:lixianmin at gmail.com> 

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From avianlegends at yahoo.com  Mon Mar  5 13:47:01 2007
From: avianlegends at yahoo.com (Avi Anu)
Date: Mon, 5 Mar 2007 10:47:01 -0800 (PST)
Subject: ABC with Linux
Message-ID: <908341.31753.qm@web50409.mail.yahoo.com>

Im tryin to make ABC (a bitorrent client) work under linux. I installed everything, that is ABC, wxpython, glib and gtk, and now I get a python error, saying it can't find wxpython. Am I supposed to set an environmental variable too?

A little learning is a dangerous thing, but we must take that risk because a little is as much as our biggest heads can hold. 
George Bernard Shaw
 
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From zxo102 at gmail.com  Sat Mar  3 13:37:19 2007
From: zxo102 at gmail.com (zxo102)
Date: 3 Mar 2007 10:37:19 -0800
Subject: py2exe: LoadLibrary(pythondll) failed
Message-ID: <1172947039.158260.225980@j27g2000cwj.googlegroups.com>

Hi there,
   I py2exe my test.py  as test.exe with a lot of dll and pyc in that
directory. If I move the test.exe into another directory and run it
from there, it gives me an error " LoadLibrary(pythondll) failed...
python24.dll".  How can I set it up correctly for this test.exe to
run?   Thanks.

Ouyang



From http  Tue Mar 13 01:55:55 2007
From: http (Paul Rubin)
Date: 12 Mar 2007 21:55:55 -0800
Subject: distributed queue?
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
	<55h495F250nqbU1@mid.individual.net>
	<7xhcsssgsm.fsf@ruckus.brouhaha.com>
	<55ib3rF24d6qgU4@mid.individual.net>
Message-ID: <7xbqixd6vo.fsf@ruckus.brouhaha.com>

Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
> Twisted _is_ asynchronous networking. It also has database classes:
> http://twistedmatrix.com/documents/current/api/twisted.enterprise.html

I see it uses threads:

http://twistedmatrix.com/trac/browser/trunk/twisted/enterprise/adbapi.py#L326


From Leo.Kislov at gmail.com  Fri Mar 16 02:31:39 2007
From: Leo.Kislov at gmail.com (Leo Kislov)
Date: 15 Mar 2007 23:31:39 -0700
Subject: lock problem
In-Reply-To: <mailman.5153.1173996320.32031.python-list@python.org>
References: <mailman.5153.1173996320.32031.python-list@python.org>
Message-ID: <1174026699.143415.69940@n59g2000hsh.googlegroups.com>

On Mar 15, 2:31 pm, Ritesh Raj Sarraf <r... at researchut.com> wrote:

[snip]

>         os.environ['__kabc_ldap'] = temp_file_name

[snip]

> Now as per the above code, "aa" is the first string which will be executed in
> Thread-1. In my query to the ldap server, I am getting a record which matches
> the "aa" string. I've verified it by putting a breakpoint and checking the
> value.
>
> The problem is that when I run the program manually, I don't get the data from
> the first thread i.e. of the string "aa".
>
> I'm not sure if there's something wrong in the code mentioned above or is it
> really a lock problem.
>
> Can somebody please help about where I'm doing any mistake ?

You're changing environmental variable __kabc_ldap that is shared
between your threads. Environment is not designed for that kind of
usage, it was designed for settings. Either use an option to set
output file or just redirect stdout. If the interface of ldapsearch is
so lame that it requires environmental variable use env to set the
variable: "env __kabc_ldap=/tmp/wrjhdsf ldapsearch ..."

  -- Leo



From gagsl-py2 at yahoo.com.ar  Mon Mar 12 23:46:31 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 00:46:31 -0300
Subject: httplib/socket problems reading 404 Not Found response
References: <1173755273.697153.97270@64g2000cwx.googlegroups.com>
Message-ID: <op.to3zftucx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 00:07:55 -0300, Patrick Altman <paltman at gmail.com>  
escribi?:

> I am attempting to use a HEAD request against Amazon S3 to check
> whether a file exists or not and if it does parse the md5 hash from
> the ETag in the response to verify the contents of the file so as to
> save on bandwidth of uploading files when it is not necessary.
> The problem lies when I attempt to send a HEAD request when no file
> exists.   As expected, a 404 Not Found response is sent back from
> Amazon however, my test scripts seem to hang.  I run python with
> trace.py and it hangs here:

Yes, it's a known problem. See this message with a self-response:
http://mail.python.org/pipermail/python-list/2006-March/375087.html

-- 
Gabriel Genellina



From claird at lairds.us  Fri Mar 30 07:46:19 2007
From: claird at lairds.us (Cameron Laird)
Date: Fri, 30 Mar 2007 11:46:19 +0000
Subject: PyPy for dummies
References: <460c5515$0$90269$14726298@news.sunsite.dk>
	<1175234352.463435.36720@n76g2000hsh.googlegroups.com>
Message-ID: <bt9vd4-1rg.ln1@lairds.us>

In article <1175234352.463435.36720 at n76g2000hsh.googlegroups.com>,
Paddy <paddy3118 at googlemail.com> wrote:
			.
			.
			.
>It is also European funding for an open source project with sprints.
>I'm sure some eurocrat will be dissecting the project to see if it is
>aa good way to fund technical projects.
>
>- Paddy.
>

PyPy-ers, what *are* the prospects in this direction?
Are there write-ups planned that'll be of interest to
computing people?


From gigs at hi.t-com.hr  Tue Mar 20 12:45:31 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Tue, 20 Mar 2007 17:45:31 +0100
Subject: P: maticna graficka monitor
Message-ID: <etp33d$gcf$1@ss408.t-com.hr>

prodajem:

maticnu sapphire am2rd580adv, pola god stara, pod garancijom -> 700kn

graficku sapphire x1650 pro 256 mb pola god start pod garancijom -> 600kn

monitor philips 190p6es brilliance (kostao 4.100), star 1.5 godinu 
garancija vrijedi jos 1.5 godinu -> 2000kn


From bignose+hates-spam at benfinney.id.au  Wed Mar 21 04:02:59 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 21 Mar 2007 19:02:59 +1100
Subject: How to tell  easy_install that a package is already installed
References: <4600dd4d$0$98624$c30e37c6@lon-reader.news.telstra.net>
Message-ID: <87slbz3txo.fsf@benfinney.id.au>

Charles Sanders <C.delete_this.Sanders at BoM.GOv.AU> writes:

> I  am not sure if this is the right forum to ask this. If it is not,
> could someone pleas point me to a more appropriate newsgroup.

You want the distutils SIG mailing list for Python. Setuptools is an
extension of Python's standard distutils.

    <URL:http://mail.python.org/mailman/listinfo/distutils-sig>

Be sure to read the information links on that page before posting.

-- 
 \          "If you get invited to your first orgy, don't just show up |
  `\             nude. That's a common mistake. You have to let nudity |
_o__)                                       'happen.'"  -- Jack Handey |
Ben Finney



From __peter__ at web.de  Thu Mar  1 05:12:24 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 01 Mar 2007 11:12:24 +0100
Subject: splitting perl-style find/replace regexp using python
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
Message-ID: <es68re$7tu$03$1@news.t-online.com>

John Pye wrote:

> I have a file with a bunch of perl regular expressions like so:
> 
> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
> bold
> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
> b>''$3/ # italic bold
> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
> italic
> 
> These are all find/replace expressions delimited as '/search/replace/
> # comment' where 'search' is the regular expression we're searching
> for and 'replace' is the replacement expression.
> 
> Is there an easy and general way that I can split these perl-style
> find-and-replace expressions into something I can use with Python, eg
> re.sub('search','replace',str) ?
> 
> I though generally it would be good enough to split on '/' but as you
> see the <\/b> messes that up. I really don't want to learn perl
> here :-)

How about matching all escaped chars and '/', and then throwing away the
former:

def split(s):
    breaks = re.compile(r"(\\.)|(/)").finditer(s)
    left, mid, right = [b.start() for b in breaks if b.group(2)]
    return s[left+1:mid], s[mid+1:right]

Peter


From __peter__ at web.de  Fri Mar  2 09:25:49 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Mar 2007 15:25:49 +0100
Subject: Sorting strings containing special characters (german 'Umlaute')
References: <1172843975.333807.312130@t69g2000cwt.googlegroups.com>
Message-ID: <es9c2i$bdk$00$1@news.t-online.com>

DierkErdmann at mail.com wrote:

> I know that this topic has been discussed in the past, but I could not
> find a working solution for my problem: sorting (lists of) strings
> containing special characters like "?", "?",... (german umlaute).
> Consider the following list:
> l = ["Aber", "Beere", "?rger"]
> 
> For sorting the letter "?" is supposed to be treated like "Ae",

I don't think so:

>>> sorted(["Ast", "?rger", "Ara"], locale.strcoll)
['Ara', '\xc3\x84rger', 'Ast']

>>> sorted(["Ast", "Aerger", "Ara"])
['Aerger', 'Ara', 'Ast']

> therefore sorting this list should yield
> l = ["Aber, "?rger", "Beere"]
> 
> I know about the module locale and its method strcoll(string1,
> string2), but currently this does not work correctly for me. Consider
>      >>> locale.strcoll("?rger", "Beere")
>      1
> 
> Therefore "?rger" ist sorted after "Beere", which is not correct IMO.
> Can someone help?
> 
> Btw: I'm using WinXP (german) and
>>>> locale.getdefaultlocale()
> prints
>    ('de_DE', 'cp1252')

The default locale is not used by default; you have to set it explicitly

>>> import locale
>>> locale.strcoll("?rger", "Beere")
1
>>> locale.setlocale(locale.LC_ALL, "")
'de_DE.UTF-8'
>>> locale.strcoll("?rger", "Beere")
-1

By the way, you will avoid a lot of "?rger"* if you use unicode right from
the start.

Finally, for efficient sorting, a key function is preferable over a cmp
function:

>>> sorted(["Ast", "?rger", "Ara"], key=locale.strxfrm)
['Ara', '\xc3\x84rger', 'Ast']

Peter

(*) German for "trouble"


From aleax at mac.com  Thu Mar 29 03:49:14 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 00:49:14 -0700
Subject: Modal value of an array
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
Message-ID: <1hvpovd.1anin2by4gjl1N%aleax@mac.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:
   ...
> That's not the only case though. What do you expect to be returned for
> an input of ["eggs", "beans", "beans", "eggs", "spam"] ?
> 
> Assuming you want *a* mode value, and any one will do (e.g. any of
> "spam", "eggs" or "beans" is okay), I'd write it this way as a first
> guess:
> 
>     >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
>     >>> counts = [(foo.count(val), val) for val in set(foo)]
>     >>> counts
>     [(2, 'eggs'), (1, 'beans'), (4, 'spam')]
>     >>> sorted(counts)[-1]
>     (4, 'spam')
>     >>> sorted(counts)[-1][1]
>     'spam'

A bit more directly:

>>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
>>> max(foo, key=foo.count)
'spam'


Alex


From bj_666 at gmx.net  Thu Mar 29 13:57:13 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 29 Mar 2007 19:57:13 +0200
Subject: Best way to wait for string input
References: <1175189403.036584.239880@o5g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.29.17.57.13.943392@gmx.net>

In <1175189403.036584.239880 at o5g2000hsb.googlegroups.com>, kevinliu23
wrote:

> Python newbie here for some expert help. So basically I want to design
> a menu system that waits for a string input. I'm not sure what the
> best way of going about this is. The current system waits for a single
> character input using msvcrt.kbhit( ) and msvcrt.getch( ). Is there
> something equivalent to wait for string inputs?

The builtin `raw_input()`?

Ciao,
	Marc 'BlackJack' Rintsch


From Allerdyce.John at gmail.com  Tue Mar 20 00:48:36 2007
From: Allerdyce.John at gmail.com (John)
Date: 19 Mar 2007 21:48:36 -0700
Subject: How to calculate a file of equations in python
Message-ID: <1174366116.474507.298010@b75g2000hsg.googlegroups.com>

Hi,
I have a text file which contains math expression, like this
134
+234
+234

(i.e. an operation (e.g. '+) and then a number and then a new line).

Can you please tell me what is the easiest way to calculate that file?
for example the above example should be = 134 + 234 + 234 = 602.

Thank you.



From jimburton1 at gmail.com  Thu Mar 22 10:58:04 2007
From: jimburton1 at gmail.com (jim burton)
Date: 22 Mar 2007 07:58:04 -0700
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <57idnf5DTKfj55_bnZ2dnUVZ_uzinZ2d@comcast.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnf5DTKfj55_bnZ2dnUVZ_uzinZ2d@comcast.com>
Message-ID: <1174575484.699736.260130@n59g2000hsh.googlegroups.com>

On 22 Mar, 12:45, Lew <l... at nospam.lewscanon.com> wrote:
> Jim Burton wrote:
> > Or you could stop feeding the trolls.
>
> People need to stop saying that. The original post was a detailed if incorrect
> exposition of Java information. How in the world do you rate that trollish?
>
> I have absolutely no reason to rate the OP as a troll or their post as trollish.
>
> -- Lew

Oh, in that case welcome to usenet. Take a while to settle in. There's
this guy here called Xah and he is a troll.



From steve at holdenweb.com  Sun Mar 25 17:14:43 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sun, 25 Mar 2007 17:14:43 -0400
Subject: Multi-line strings with formatting
In-Reply-To: <pan.2007.03.24.03.43.27.229103@REMOVE.THIS.cybersource.com.au>
References: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>	<1174669850.3450.40.camel@dot.uniqsys.com>	<mailman.5524.1174674566.32031.python-list@python.org>	<1174703993.715410.173780@e65g2000hsc.googlegroups.com>
	<pan.2007.03.24.03.43.27.229103@REMOVE.THIS.cybersource.com.au>
Message-ID: <eu6oqj$umh$1@sea.gmane.org>

Steven D'Aprano wrote:
> On Fri, 23 Mar 2007 19:39:53 -0700, Paul McGuire wrote:
> 
>> (and I'm glad I'm not the only one who uses 'l' for a scratch list
>> variable...)
> 
> Yes, and come the revolution, every last one of you will be down the salt
> mines.
> 
Better that than up against the wall, I suppose.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From gagsl-py2 at yahoo.com.ar  Wed Mar 21 00:15:37 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 21 Mar 2007 01:15:37 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
Message-ID: <op.tpit4byvx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 00:46:03 -0300, John Pye  
<john.pye at student.unsw.edu.au> escribi?:

> This is not an option for me, as I want to pass the
> FILE* from Python and all the way into into a existing shared-library
> code. I can't change the latter; it must work ok with standard fprintf
> (etc) functions.

You can get the file descriptor from the Python file object using its  
fileno() method. The file descriptor lives at the OS level, so it's safe  
to pass around. You can regenerate a new FILE struct (using the other  
runtime library) with fdopen.


-- 
Gabriel Genellina



From Afro.Systems at gmail.com  Sat Mar  3 04:22:08 2007
From: Afro.Systems at gmail.com (Tzury)
Date: 3 Mar 2007 01:22:08 -0800
Subject: How to query a unicode data from sqlite database
Message-ID: <1172913727.974743.208450@p10g2000cwp.googlegroups.com>

Can anyone tell the technique of composing a WHERE clause that refer
to a unicode data. e.g.  "WHERE FirstName = ABCD" where ABCD is  the
unicoded first name in the form that sqlite will match with its
records.



From http  Wed Mar 21 21:13:11 2007
From: http (Paul Rubin)
Date: 21 Mar 2007 17:13:11 -0800
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<871wjiuz5q.fsf@pobox.com>
	<1174508599.250404.176510@y66g2000hsf.googlegroups.com>
	<87slbyt908.fsf@pobox.com>
Message-ID: <7xfy7y5bdk.fsf@ruckus.brouhaha.com>

jjl at pobox.com (John J. Lee) writes:
> You've explained that *linking* to a non-permanent URL would break the
> rules.  You haven't explained why *pasting in* the text of the post
> would break the rules (I don't say it wouldn't break them, I'm just
> curious).

I've looked into this situation and I advise just not worrying about
it for now.  The link is likely to be restored pretty soon if it
hasn't been already.  If not, wait a day or two and then put it back.
It was removed along with a zillion other Usenet links because someone
got overzealous about spam reversion and turned an automatic script
loose that removed all such links indiscriminately, including a lot
that there wasn't anything wrong with.  There was a discussion on the
wiki about it, the person stopped the script, and is now (slowly)
undoing the script's removals.


From michele.simionato at gmail.com  Fri Mar  9 11:55:26 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 9 Mar 2007 08:55:26 -0800
Subject: Is this right? Multiple imports of same module.
In-Reply-To: <pecora-0239F9.11184709032007@ra.nrl.navy.mil>
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<pan.2007.03.09.15.33.01.991831@gmx.net>
	<pecora-0239F9.11184709032007@ra.nrl.navy.mil>
Message-ID: <1173459326.494262.19940@64g2000cwx.googlegroups.com>

On Mar 9, 5:18 pm, Lou Pecora <pec... at anvil.nrl.navy.mil> wrote:
> I have noticed that using from xxx import * can lead to problems when
> trying to access variables in the xxx module.

``from xxx import *`` is intended to be used in the interactive
interpreter
only.

        Michele Simionato



From adam at atlas.st  Mon Mar  5 16:42:30 2007
From: adam at atlas.st (Adam Atlas)
Date: 5 Mar 2007 13:42:30 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <45ec89a4$0$2349$426a74cc@news.free.fr>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
Message-ID: <1173130950.396201.181900@8g2000cwh.googlegroups.com>

This could be easily made into a distutils extension (which was my
intention all along, though that's not implemented yet). That's not
the point. This is not intended as a "way to package source code".
It's analogous to bdist, not sdist. The convenience gain is for the
users, not (primarily) the developers, of the package.

To use an Egg, you have to either put it in your sys.path manually or
install setuptools and use it to install the Egg in some global scope.
The advantage of Squisher is that you can take a whole package, squish
it into one .pyc file, and distribute that. Then, anyone who downloads
it can get a simple module file that can be used anywhere a usual .py
file can, without editing sys.path or installing it somewhere.
(Actually, this could be combined with eggs, since they're just ZIP
files. You could use the same file as an egg or as a squished module
simply by changing its extension.)

...Or am I missing something obvious about setuptools that already
does this and making a fool of myself? :)



From jjl at pobox.com  Sat Mar 10 19:22:34 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 11 Mar 2007 00:22:34 GMT
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
Message-ID: <87hcsszl0w.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:
[...]
> This kind of nonsense is why hosting companies don't want to support Python.

<snigger>  There seems a more obvious reason...


> Perl and PHP may be dumb, but they just work.  Java has a company behind it.
> Python just isn't ready.  Which is embarassing, ten years on.
[...]

I recall similar pain with Perl.  The one Perl list I still frequent
has regular postings about these kinds of problems (which are rarely
answered -- perhaps the maintainers have moved on).

My occasional Java experiences have been *far*, *far* worse in this
respect that what I've seen with either Perl or Python.

Does that tell you much?  Not really, and neither do your experiences.


John


From kevinliu23 at gmail.com  Fri Mar 30 11:38:27 2007
From: kevinliu23 at gmail.com (kevinliu23)
Date: 30 Mar 2007 08:38:27 -0700
Subject: Inserting '-' character in front of all numbers in a string
Message-ID: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>

Hey guys,

I want to be able to insert a '-' character in front of all numeric
values in a string. I want to insert the '-' character to use in
conjunction with the getopt.getopt() function.

Rigt now, I'm implementing a menu system where users will be able to
select a set of options like "2a 3ab" which corresponds to menu
choices. However, with getopt.getopt(), it'll only return what I want
if I input -2a -3ab as my string. I don't want the user have to insert
a '-' character in front of all their choices, so I was thinking of
accepting the string input first, then adding in the '-' character
myself.

So my qusetion is, how do I change:

"2a 3ab" into "-2a -3ab".

Regular expressions? :/



From kibleur.christophe at gmail.com  Fri Mar  2 20:12:02 2007
From: kibleur.christophe at gmail.com (Tool69)
Date: 2 Mar 2007 17:12:02 -0800
Subject: Newbie Test
In-Reply-To: <mailman.4617.1172882604.32031.python-list@python.org>
References: <mailman.4617.1172882604.32031.python-list@python.org>
Message-ID: <1172884322.248679.278100@n33g2000cwc.googlegroups.com>

On 3 mar, 01:44, Nicholas Parsons <parsons.nichol... at gmail.com> wrote:
> Greetings,
>
> This is just a test to see if I can post to this mailing list.  Can
> someone from the list please respond to this email so I know it worked?
>
> Thanks in advance!
> --Nick

Hi Nicholas,

Does it work for you ?



From pabloreda at gmail.com  Sat Mar 31 15:18:02 2007
From: pabloreda at gmail.com (pabloreda)
Date: 31 Mar 2007 12:18:02 -0700
Subject: Game programming for kids: looking for open source 2D game
	development kit
In-Reply-To: <87slbmq6pe.fsf@rudin.co.uk>
References: <euid24$ugc$1@online.de><euig08$fv3$2@news2.u-psud.fr>
	<460d4f36$0$10784$c3e8da3@news.astraweb.com>
	<87slbmq6pe.fsf@rudin.co.uk>
Message-ID: <1175368682.323305.70490@p15g2000hsd.googlegroups.com>

I 'm doing the same

in forth...

www.reda4.org





From nobody at invalid.com  Tue Mar 13 12:55:54 2007
From: nobody at invalid.com (Erik Johnson)
Date: Tue, 13 Mar 2007 10:55:54 -0600
Subject: struct.pack oddity
References: <45f6bd4a$0$6972$afc38c87@>
Message-ID: <45f6d7a9$1@nntp.zianet.com>


"Dave Opstad" <dave.opstad at monotypeimaging.com> wrote in message
news:45f6bd4a$0$6972$afc38c87 at ...
> Is the lack of a struct.error when the byte-order mark is at the start
> of the format intentional? This seems like a bug to me, but maybe
> there's a subtlety here I'm not seeing.

    I am by no means any sort of expert on this module, but for what it's
worth, the behaviour is basically the same for my Python 2.4.3 under Cygwin
(except that there is no deprecation warning) and I agree with you: this
seems like a bug to me. Or maybe not technically a bug, but the behaviour
could be improved. I would expect to get the same struct.error in all three
cases:

$ python
Python 2.4.3 (#1, May 18 2006, 07:40:45)
[GCC 3.3.3 (cygwin special)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from struct import *
>>> pack('H', 100000)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
struct.error: short format requires 0<=number<=USHRT_MAX
>>> pack('>H', 100000)
'\x86\xa0'
>>> pack('<H', 100000)
'\xa0\x86'
>>>

    There used to be a form at the bottom left of the main site:
www.python.org for reporting bugs, but that now seems to be used only for
reporting stuff about the web site itself.  The struct module comes from
struct.dll, so I can't see any comments about who wrote or maintains that
module.

    Barring anyone else disagreeing with classifying it as a bug, I would
suggest reporting it. Proper procedure for reporting a bug appears to be
covered in section B of the Python Library Reference:
http://docs.python.org/lib/reporting-bugs.html

Hope that helps,
-ej




From martinunsal at gmail.com  Mon Mar  5 11:32:34 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 5 Mar 2007 08:32:34 -0800
Subject: Project organization and import
In-Reply-To: <87mz2s32rb.fsf@gmail.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
Message-ID: <1173112353.210937.214020@v33g2000cwv.googlegroups.com>

Jorge, thanks for your response. I replied earlier but I think my
response got lost. I'm trying again.

On Mar 4, 5:20 pm, Jorge Godoy <jgo... at gmail.com> wrote:
> Why?  RCS systems can merge changes.  A RCS system is not a substitute for
> design or programmers communication.

Text merges are an error-prone process. They can't be eliminated but
they are best avoided when possible.

When refactoring, it's much better to move small files around than to
move chunks of code between large files. In the former case your SCM
system can track integration history, which is a big win.

> Unit tests help being sure that one change doesn't break the project as a
> whole and for a big project you're surely going to have a lot of those tests.

But unit tests are never an excuse for error prone workflow. "Oh,
don't worry, we'll catch that with unit tests" is never something you
want to say or hear.

> I don't reload...  When my investigative tests gets bigger I write a script
> and run it with the interpreter.  It is easy since my text editor can call
> Python on a buffer (I use Emacs).

That's interesting, is this workflow pretty universal in the Python
world?

I guess that seems unfortunate to me, one of the big wins for
interpreted languages is to make the development cycle as short and
interactive as possible. As I see it, the Python way should be to
reload a file and reinvoke the class directly, not to restart the
interpreter, load an entire package and then run a test script to set
up your test conditions again.

Martin



From aleax at mac.com  Tue Mar  6 01:06:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 5 Mar 2007 22:06:44 -0800
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
Message-ID: <1huivd7.7l18eh1paqp0aN%aleax@mac.com>

Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:

> >>I don't reload...  When my investigative tests gets bigger I write a script
> >>and run it with the interpreter.  It is easy since my text editor can call
> >>Python on a buffer (I use Emacs).
> >  
> > That's interesting, is this workflow pretty universal in the Python
> > world?
> 
> I don't know, but that's also mostly how I do work.

My favorite way of working: add a test (or a limited set of tests) for
the new or changed feature, run it, check that it fails, change the
code, rerun the test, check that the test now runs, rerun all tests to
see that nothing broke, add and run more tests to make sure the new code
is excellently covered, rinse, repeat.  Occasionally, to ensure the code
stays clean, stop to refactor, rerunning tests as I go.

I'm also keen on bigger tests (integration tests, as well as system
tests for regressions, acceptance, etc), but of course I don't run those
anywhere as frequently (they're not part of my daily workflow, iterated
multiple times per day -- more like a "nightly run" kind of thing, or
for special occasions such as just before committing into HEAD... I'm
somewhat of a stickler about HEAD *always* passing *all* tests...).

Not exactly TDD, please note -- I tend to start the cycle with a few
tests (not strictly just one), implement some large chunk of the
new/changed stuff, and add "coverage" and "boundary cases" tests towards
the end of the cycle (more often than not I don't need further changes
to satisfy the coverage and boundary-case tests, because of the "large
chunk" thing).  So, a TDD purist would blast me for heresy.

Nevertheless, having tried everything from pure TDD to papertrail-heavy
waterfall (including the "toss the bits over the wall to QA", shudder!)
to typical Chaos Driven Development, in over a quarter century of
experience, this almost-TDD is what works best for me -- in Python, C,
and C++, at least (it's been a long time, if ever, since I did enough
production Java, Haskell, Ruby, SML, assembly, Perl, bash, Fortran,
Cobol, Objective C, Tcl, awk, Scheme, PL/I, Rexx, Forth, Pascal,
Modula-2, or Basic, to be sure that the same approach would work well in
each of these cases, though I have no reason to think otherwise).


Alex


From godzillaismad at gmail.com  Fri Mar 23 20:44:15 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 23 Mar 2007 17:44:15 -0700
Subject: Create new processes over telnet in XP
In-Reply-To: <1174658259.620897.171480@o5g2000hsb.googlegroups.com>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
	<1174658259.620897.171480@o5g2000hsb.googlegroups.com>
Message-ID: <1174697054.986447.310890@l75g2000hse.googlegroups.com>

On Mar 24, 12:57 am, "Rob Wolfe" <r... at smsnet.pl> wrote:
> Godzilla wrote:
> > Hello,
>
> > How do you create/spawn new processes in XP over telnet using python?
> > I.e. I would like to create a new process and have it running in the
> > background... when I terminate the telnet connection, I would what the
> > spawned processes to keep running until I shut it off...
>
> > I got the os.popen method to spawn a new process running in the
> > backgroun, but not over telnet... tried os.popen[2, 3, 4] and also
> > subprocesses.popen without any luck...
>
> I don't know what kind of OS there is on that remote host you telnet
> to.
> The idea boils down to appropriate using of methods
> `read_until` and `write` from class `telnetlib.Telnet`.
>
> For more complicated stuff you can consider using pyexpect.
>
> Here is a small example of connecting to HP-UX.
> You can adjust that to your needs.
>
> <code>
> import telnetlib, time
>
> def login(tn, login, passwd, prompt):
>     tn.read_until("login: ")
>     tn.write(login + "\n")
>     if passwd:
>         tn.read_until("Password: ")
>         tn.write(passwd + "\n")
>     tn.read_until(prompt)
>     time.sleep(2)
>     print "logged in"
>
> def run_proc(tn, progname):
>     tn.write("nohup %s &\n" % progname)
>     tn.write("exit\n")
>     print "program <%s> running" % progname
>
> def kill_proc(tn, login, prompt, progname):
>     tn.write("ps -u %s\n" % login)
>     buf = tn.read_until(prompt)
>     pid = get_pid(buf, progname)
>     if not pid:
>         print "program <%s> not killed" % progname
>         tn.write("exit\n")
>         return
>     tn.write("kill -TERM %s\n" % pid)
>     tn.write("exit\n")
>     print "program <%s> killed" % progname
>
> def get_pid(buf, progname):
>     pid, comm = None, None
>     for line in buf.split("\n"):
>         try:
>             pid, _, _, comm = line.split()
>         except ValueError:
>             continue
>         if comm == progname:
>             return pid
>
> tn = telnetlib.Telnet(HOST, PORT)
> #tn.set_debuglevel(1)
> login(tn, "login", "passwd", "/home/user")
> run_proc(tn, "python ~/test.py")
> #kill_proc(tn, "login", "/home/user", "python")
> </code>
>
> --
> HTH,
> Rob

Thanks guys for your input...

Rob, I will give your example a go soon and tell you how i go...

Have a nice day...



From nick at craig-wood.com  Sat Mar 31 05:30:04 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Sat, 31 Mar 2007 04:30:04 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<mailman.5697.1175060331.32031.python-list@python.org>
	<slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
	<mailman.5746.1175160012.32031.python-list@python.org>
	<slrnf0n5b4.qr8.nick@irishsea.home.craig-wood.com>
	<mailman.5780.1175242922.32031.python-list@python.org>
Message-ID: <slrnf0s7tn.u6a.nick@irishsea.home.craig-wood.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>   "Nick Craig-Wood" <n...k at cra..od.com> wrote:
> 
> > I'd like there to be something which works well enough for day to day
> > use.  Ie doesn't ever wreck the internals of python.  It could have
> > some caveats like "may not timeout during C functions which haven't
> > released the GIL" and that would still make it very useable.
> 
>  I second this (or third or whatever if my post is slow).
>  It is tremendously useful to start something and to be told it has timed
>  out by a call, rather than to have to unblock the i/o yourself and
>  to "busy-loop" to see if its successful.

Yes, exactly!

>  And from what I can see the select functionality is not much
>  different from busy looping...

Conceptually it is no different.  In practice your process goes to
sleep until the OS wakes it up again with more data so it is much more
CPU efficient (and possibly lower latency) than busy waiting.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From jrpfinch at gmail.com  Fri Mar 23 08:40:22 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 23 Mar 2007 05:40:22 -0700
Subject: Cleanly exiting multi thread application on SIGINT
Message-ID: <1174653622.239148.185270@y80g2000hsf.googlegroups.com>

Is the following the most elegant way to exit a multi-threaded
application on a Ctrl-C?  I am a complete beginner and would have
thought there was some way of doing it without having to use while 1:
pass, but have yet to find a way.

N.B. exit() is a method for cleanly exiting the thread using a queue.

Many thanks

Jon

def main:
    wt = workerThread()
    wt.setDaemon(True)
    wt.start()
    ct = counterThread()
    ct.setDaemon(True)
    ct.start()
    try:
        while 1:
            pass
    except KeyboardInterrupt:
        wt.exit()
        ct.exit()



From kadarlakiran at yahoo.com  Fri Mar  2 23:42:55 2007
From: kadarlakiran at yahoo.com (kadarla kiran kumar)
Date: Fri, 2 Mar 2007 20:42:55 -0800 (PST)
Subject: implementing SFTP using Python
Message-ID: <683868.19200.qm@web38806.mail.mud.yahoo.com>

Hi Everybody,
   
  I have to implement SFTP conection from client to the server using Python script.
  Iam very new new to python , and i dont't have much time to complete this. So I need some pointers from you.
   
  If anybody has already done this kind of stuff, please let me know. Please don't think Iam over ambitious, but i need some kind of Pseudo code ,if possible source code.
   
  Thanks in Advance,
  K.Kiran Kumar

 
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From s99999999s2003 at yahoo.com  Tue Mar 20 02:08:29 2007
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 19 Mar 2007 23:08:29 -0700
Subject: using regexp
In-Reply-To: <mailman.5322.1174370274.32031.python-list@python.org>
References: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>
	<45FF7646.5030801@ncee.net>
	<mailman.5322.1174370274.32031.python-list@python.org>
Message-ID: <1174370909.824252.98750@p15g2000hsd.googlegroups.com>

On Mar 20, 1:57 pm, Shane Geiger <sgei... at ncee.net> wrote:
> import re
> line = '123456789123456789'
> print re.findall('([0-9]{3})', line)
>
>
>
> Shane Geiger wrote:
> > You don't even need regex.
>
> > def
> > split_seq(seq,size):
>
> >    # this is sort of the inverse of
> > flatten
>
> >    # Source:
> >http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/425044
>
> >    return [seq[i:i+size] for i in range(0, len(seq),
> > size)]
>
> > line =
> > '123456789123456789'
>
> > print
> > split_seq(line,3)
>
> > Will that work for you?
>
> > s99999999s2... at yahoo.com wrote:
> >> hi
> >> how can i use regexp to group these digits into groups of 3?
>
> >> eg
> >> line 123456789123456789
>
> >> i have :
>
> >> pat = re.compile("line\s+(\d{3})" , re.M|re.DOTALL)
>
> >> but this only gives the first 3. I also tried
>
> >> "line\s+(\d{3})+"
> >> but also not working.
> >> I need output to be ['123' ,'456','789', '123','456','789', .....]
> >> thanks.
>
> --
> Shane Geiger
> IT Director
> National Council on Economic Education
> sgei... at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> Leading the Campaign for Economic and Financial Literacy
>
>  sgeiger.vcf
> 1KDownload


hi
thanks.
I know it can be done without regexp, but its just for learning
purpose, i want to use regexp
eg
someword 123456789123456789 #this is a line of a file. 'someword' is a
word before the digits
I need to get the digits into groups of 3 based on whether i found
'someword'.
so i use  this pattern :
"someword\s+(\d{3})"
but this will on give me the first 3.  I need to group them all.
hope i explain it clearly.



From steven.bethard at gmail.com  Thu Mar  1 15:11:50 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 01 Mar 2007 13:11:50 -0700
Subject: class declaration shortcut
In-Reply-To: <1172779488.418564.90880@j27g2000cwj.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
	<YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
	<1172772214.569734.95990@n33g2000cwc.googlegroups.com>
	<xemdnYBwM6UetnrYnZ2dnUVZ_qarnZ2d@comcast.com>
	<1172779488.418564.90880@j27g2000cwj.googlegroups.com>
Message-ID: <HqqdndBVKtkZrnrYnZ2dnUVZ_vqpnZ2d@comcast.com>

Arnaud Delobelle wrote:
>>>>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237
[snip]
> Although I don't see the necessity of a metaclass: you could have
> 
> class Record(object):
>     def __init__(self, *vals):
>         for slot, val in zip(self.__slots__, vals):
>             setattr(self, slot, val)
>     # And the other methods
> 
> if you want positional slots initialisation.  I chose keyword
> arguments in mine

You could certainly do it that way, but note that the one with the 
metaclass not only allows *either* positional or keyword arguments, but 
also displays better help messages -- using the *vals or **vals code, 
help() will tell you something like:

     __init__(self, **vals)

while using the metaclass-generated __init__, help() will tell you the 
more informative:

     __init__(self, name)

(Or whatever signature is appropriate given the __slots__.) So no, it's 
not necessary, but it does have a few advantages.

STeVe


From tismer at stackless.com  Wed Mar 28 18:47:53 2007
From: tismer at stackless.com (Christian Tismer)
Date: Thu, 29 Mar 2007 00:47:53 +0200
Subject: how can I clear a dictionary in python
In-Reply-To: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
Message-ID: <B2590970-889A-4431-8327-CB9D73FAF6C0@stackless.com>


On 29.03.2007, at 00:38, Marko.Cain.23 at gmail.com wrote:

> Hi,
>
> I create a dictionary like this
> myDict = {}
>
> and I add entry like this:
> myDict['a'] = 1
> but how can I empty the whole dictionary?

Reading the Python docs might help.
But before, I would try a dir(myDict).
Maybe you will find an easter-egg
which has exactly the name you are looking for?

cheers - chris



From george.sakkis at gmail.com  Wed Mar  7 23:06:44 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Mar 2007 20:06:44 -0800
Subject: Bug in python!? persistent value of an optional parameter in
	function!
In-Reply-To: <7xy7m8beo9.fsf@ruckus.brouhaha.com>
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
	<7xy7m8beo9.fsf@ruckus.brouhaha.com>
Message-ID: <1173326803.964461.187980@8g2000cwh.googlegroups.com>

On Mar 7, 10:24 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> John Nagle <n... at animats.com> writes:
> >     True.  It would make sense to disallow mutable values as
> > initial values for optional arguments.  The present behavior is silly.
>
> That would be the worst of both worlds.  The main alternative to the
> present behavior is re-computing the default value every time the
> function is entered.

One can do this is today's Python if he's so inclined, albeit with a
more verbose syntax: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502206

George



From aleax at mac.com  Thu Mar  1 10:55:12 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 1 Mar 2007 07:55:12 -0800
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1hu9p0u.1rc19sp19r95zhN%aleax@mac.com>
	<45e6bc1b$0$6835$4d3efbfe@news.sover.net>
Message-ID: <1huadvz.gpi9w517yqah5N%aleax@mac.com>

Leif K-Brooks <eurleif at ecritters.biz> wrote:

> Alex Martelli wrote:
> > You should probaby prepare before the loop a mapping from char to number
> > of 1 bits in that char:
> > 
> > m = {}
> > for c in range(256):
> >   m[c] = countones(c)
> 
> Wouldn't a list be more efficient?
> 
> m = [countones(c) for c in xrange(256)]

Yes, or an array.array -- actually I meant to use m[chr(c)] above (so
you could use the character you're reading directly to index m, rather
than calling ord(byte) a bazillion times for each byte you're reading),
but if you're using the numbers (as I did before) a list or array is
better.


Alex


From dbhbarton at googlemail.com  Fri Mar  9 06:01:45 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 03:01:45 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <55cs24F23meg4U1@mid.individual.net>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
Message-ID: <1173438105.600342.243200@n33g2000cwc.googlegroups.com>

>Those characters have no syntactical meaning...

?
Neither does # until you give it syntactical meaning. I must be
missing what you mean.

> would, IMHO, make the language "dirty".

Well I'm not a big fan of decorators so I know how you must feel. But
# FIXME + a hack doesn't seem clean to me. And commenting off the
bottom half of a long script with triple quotes is ugly and a pain and
you can't indicate multiple alternate halt points as in the 'tutorial
script' example I gave.



From MonkeeSage at gmail.com  Mon Mar  5 20:06:00 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 17:06:00 -0800
Subject: Interface Implementation in Python
In-Reply-To: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
Message-ID: <1173143160.035896.231320@64g2000cwx.googlegroups.com>

On Mar 5, 6:25 pm, p_sha... at yahoo.com wrote:
> Hi,
>
>  I would like to know the interface concept in Python.How the
> Interface is defined and implemented in Python?.
>
> How to access the interface fromn Client?
>
> Thanks
> PSB

Not sure exactly what you mean, but in python (like most dynamic
languages) an "interface" is simply a behavioral type system. Any
object can implement an interface, based on its signature. For
example; let's say you have a file object which implements read() and
write(). Any other object with a sufficiently similar signature (e.g.,
StringIO), can be said to implement the same interface. An interface
in python is simply a specified behavior, and any object which
implements that behavior can be said to have the same "interface".

HTH,
Jordan



From sergio.correia at gmail.com  Wed Mar  7 20:06:59 2007
From: sergio.correia at gmail.com (Sergio Correia)
Date: Wed, 7 Mar 2007 20:06:59 -0500
Subject: Flatten a two-level list --> one liner?
In-Reply-To: <op.touhz1rmx6zn5v@gabriel2.softlabbsas.com.ar>
References: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>
	<op.tougqyqzx6zn5v@gabriel2.softlabbsas.com.ar>
	<f1aa6d810703071641g61b4d40fwdfb767235afa17be@mail.gmail.com>
	<op.touhz1rmx6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <f1aa6d810703071706u2852d886h6875a313ed02e5a9@mail.gmail.com>

 O_o

List comprehensions never cease to amaze me.

Thanks,


On 3/7/07, Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
> En Wed, 07 Mar 2007 21:41:16 -0300, Sergio Correia
> <sergio.correia at gmail.com> escribi?:
>
> > I forgot to say: I've already checked the discussions about
> > recursive/iterative/etc flatten() functions that can sweep through a
> > list of arbitrary length, but that's really overkill for what I want.
> >
> > However, "sum(eggs, [])" or itertools seem to do it w/out the need for
> > a new function.
> >
> > Thanks a lot!
>
> Just for being (a little!) constructive, given your preconditions on the
> list, you can use:
> eggs = [item for sublist in spam for item in sublist]
>
> --
> Gabriel Genellina
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From sjdevnull at yahoo.com  Thu Mar 29 15:16:20 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 29 Mar 2007 12:16:20 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <euenc1$fks$1@nemesis.news.tpi.pl>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<euenc1$fks$1@nemesis.news.tpi.pl>
Message-ID: <1175195780.328033.307730@l77g2000hsb.googlegroups.com>

On Mar 28, 5:36 pm, Jarek Zgoda <jzg... at o2.usun.pl> wrote:
> Carl Friedrich Bolz napisa?(a):
>
> > Welcome to the PyPy 1.0 release - a milestone integrating the results
> > of four years of research, engineering, management and sprinting
> > efforts, concluding the 28 months phase of EU co-funding!
>
> So it took 4 yars of work and over 2 yaers of consumption of EU funds,
> yeah, great.
>
> Could anybody explain, what this gives to Python and its users? Would
> we, eventually, get GIL-free VM, that is capable to consume all
> available power of multicore processors?

That is the eventual hope, along with a faster Python interpreter
(with a true functional JIT), and stackless features, and more easily
developed syntax, and retargetable front- and back- ends (allowing,
e.g. easier development of Python on the .NET CLI, JVM, etc, or other
languages like Javascript, Lisp, or whatever on the PyPy VM), and fast
extensions written in RPython instead of C, and many other features.



From psdasilvaX at esotericaX.ptX  Fri Mar  9 23:23:11 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 10 Mar 2007 04:23:11 +0000
Subject: bisect on a list of lists
In-Reply-To: <mailman.4886.1173492553.32031.python-list@python.org>
References: <1173471342.957772@iceman.esoterica.pt>	<mailman.4874.1173477506.32031.python-list@python.org>	<1173486322.393479@iceman.esoterica.pt>
	<mailman.4886.1173492553.32031.python-list@python.org>
Message-ID: <1173500591.747311@iceman.esoterica.pt>

Gabriel Genellina escreveu:
...

> Just omit the __init__ method, if you don't have anything additional to
> do. The inherited method will be used instead, as always:


Then, if I have something additional, I can do
	def __init__(self,l=None):
		if l!=None:
			list.__init__(self,l)
		...

Good! This is great!
Thanks.


From rkmr.em at gmail.com  Sun Mar 18 23:40:58 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Sun, 18 Mar 2007 20:40:58 -0700
Subject: list comprehension help
In-Reply-To: <1174269687.497013.249480@o5g2000hsb.googlegroups.com>
References: <mailman.5246.1174234283.32031.python-list@python.org>
	<1174269687.497013.249480@o5g2000hsb.googlegroups.com>
Message-ID: <e04d2e90703182040h72c7294djd3cc9ed871dd04ca@mail.gmail.com>

On 18 Mar 2007 19:01:27 -0700, George Sakkis <george.sakkis at gmail.com> wrote:
> On Mar 18, 12:11 pm, "rkmr... at gmail.com" <rkmr... at gmail.com> wrote:
> > I need to process a really huge text file (4GB) and this is what i
> > need to do. It takes for ever to complete this. I read some where that
> > "list comprehension" can fast up things. Can you point out how to do
> > it in this case?
> > thanks a lot!
> >
> > f = open('file.txt','r')
> > for line in f:
> >         db[line.split(' ')[0]] = line.split(' ')[-1]
> >         db.sync()
> You got several good suggestions; one that has not been mentioned but
> makes a big (or even the biggest) difference for large/huge file is
> the buffering parameter of open(). Set it to the largest value you can
> afford to keep the I/O as low as possible. I'm processing 15-25 GB

Can you give example of how you process the 15-25GB files with the
buffering parameter?
It will be educational to everyone I think.

> files (you see "huge" is really relative ;-)) on 2-4GB RAM boxes and
> setting a big buffer (1GB or more) reduces the wall time by 30 to 50%
> compared to the default value. BerkeleyDB should have a buffering
> option too, make sure you use it and don't synchronize on every line.

I changed the sync to once in every 100,000 lines.
thanks  a lot everyone!


From giles_brown at hotmail.com  Thu Mar  8 04:55:55 2007
From: giles_brown at hotmail.com (Giles Brown)
Date: 8 Mar 2007 01:55:55 -0800
Subject: How to build a Windows service using win32?
In-Reply-To: <mailman.4760.1173286032.32031.python-list@python.org>
References: <mailman.4760.1173286032.32031.python-list@python.org>
Message-ID: <1173347755.339145.194810@64g2000cwx.googlegroups.com>

On 7 Mar, 16:45, "Gregor Mosheh" <gre... at hostgis.com> wrote:
> Giles Brown wrote:
> > Yeah.  You've cleverly decided to simplify the "smallest
> > possible python service" by removing the
> > if __name__ == '__main__':
>
> Ha ha. :)
> Seriously, though, I removed that long after it was failing to work, and
> have since replaced it and it didn't affect a thing.

Thats "didn't affect a thing" in the sense of "it was still broken but
so it didn't *affect a thing* when something else about it was
broken"? Yeah?

For the record I'm pretty confident that the "if __name__ ==
'__main__':" is necessary to stop the module attempting to handle the
command line with the pythonservice.exe looks to import the service
class when you start the service via the SCM.

Anyway you've got it working now so thats the main thing.

Giles



From hardcoded.software at gmail.com  Wed Mar 21 21:56:02 2007
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 21 Mar 2007 18:56:02 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <mailman.5432.1174527485.32031.python-list@python.org>
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<mailman.5432.1174527485.32031.python-list@python.org>
Message-ID: <1174528562.192439.84480@l77g2000hsb.googlegroups.com>

On Mar 21, 9:24 pm, Steve Holden <s... at holdenweb.com> wrote:
> Marcin Ciura wrote:
> > Steven D'Aprano wrote:
> >>>>> x, y, z = 1, 2, 3
> >>>>> x = y = z
> >>>>> x, y, z
> >> (3, 3, 3)
>
> >> I certainly wouldn't expect to get (2, 3, 3).
>
> > Neither would I. I must have expressed myself not clearly enough.
> > Currently
> > x = y = z
> > is roughly equivalent to
> > x = z
> > y = z
> > I propose to change it to
> > y = z
> > x = z
> > Cheers,
> >    Marcin
>
> The difference being ... ?
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com

I think I see what Marcin means. The 'node' is changed too fast in the
chain, and next is assigned to 'nextnode' instead of being assigned to
node.

>>> class Node:
...     pass
...
>>> node = Node()
>>> nextnode = Node()
>>> backup_node = node
>>> node = node.next = nextnode
>>> node.next is node
True
>>> hasattr(backup_node,'next')
False



From kyosohma at gmail.com  Fri Mar 16 14:43:41 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 16 Mar 2007 11:43:41 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
Message-ID: <1174070621.850109.27230@l75g2000hse.googlegroups.com>

On Mar 16, 12:59 pm, tkp... at hotmail.com wrote:
> I have an ordered list e.g. x = [0, 100, 200, 1000], and given any
> positive integer y, I want to determine its appropriate position in
> the list (i.e the point at which I would have to insert it in order to
> keep the list sorted. I can clearly do this with a series of if
> statements:
>
> if y<x[1]:
>     n = 0
> elif y < x[2]:
>     n = 1
> elif y < x[3]:
>     n = 2
> else:
>     n = 3
>
> Or with a generator comprehension
> n  = sum ( y>x[i] for i in range(len(x)) ) - 1
>
> But there  has to be a cleaner way, as the first approach is unwieldy
> and does not adapt to changing list lengths, and the second is not
> obvious to a casual reader of the code.
>
> My list will typically have 2 to 5 items, so speed is not a huge
> issue. I'd appreciate your guidance.
>
> Sincerely
>
> Thomas Philips

One way to do this would be to use the cmp built-in and loop over the
items in the list. Maybe something like this:

x = [0, 100, 200, 1000]
numLst = len(x)
count = 0
for i in range(numLst):
	resultOfCmp = cmp(newNum, x[count])
	if resultOfCmp == -1:
		print i
		x.insert(count, newNum)
		break
	count += 1

# Where newNum is the one to be inserted.

It's a hack, but it might get the ol' creative juices flowing.

Mike



From claird at lairds.us  Tue Mar 27 07:32:24 2007
From: claird at lairds.us (Cameron Laird)
Date: Tue, 27 Mar 2007 11:32:24 +0000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<7o4ld4-qrv.ln1@lairds.us>
	<1174958090.292094.168150@e65g2000hsc.googlegroups.com>
Message-ID: <8vbnd4-ulb.ln1@lairds.us>

In article <1174958090.292094.168150 at e65g2000hsc.googlegroups.com>,
Beliavsky <beliavsky at aol.com> wrote:
			.
			.
			.
>Your experience with Fortran is dated -- see below.
>
>>
>> I'll be more clear:  Fortran itself is a distinguished
>> language with many meritorious implementations.  It can be
>> costly, though, finding the implementation you want/need
>> for any specific environment.
>
>Gfortran, which supports Fortran 95 and a little of Fortran 2003, is
>part of GCC and is thus widely available. Binaries for g95, also based
>on GCC, are available for more than a dozen platforms, including
>Windows, Mac OS X, and Linux. I use both and consider only g95 mature,
>but gfortran does produce faster programs. Intel's Fortran compilers
>cost about $500 on Windows and Mac OS and $700 on Linux. It's not
>free, but I would not call it costly for professional developers.
>
>Speaking of money, gfortran and g95 have free manuals, the latter
>available in six languages
>http://ftp.g95.org/ . Final drafts of Fortran standards, identical to
>the official ISO standards, are freely available. The manual for Numpy
>costs $40 per copy.
>

My experience with Fortran is indeed dated.  However,
I still work with university groups that balk at $500
for valuable software--sometimes because of admini-
strative conflicts with licensing (example:  the group
needs an educational license that fits its team 
perfectly, but educational license have to be approved
by a campus-wide office that involves the group in
expenses uncovered by its grants, and ... complications
ensue).  Intel's compiler, for example, is a great deal,
and recognized as a trivial expense sometimes--but
judged utterly impossible by a research group down a
different corridor.

My summary:  practical success depends on specific
details, and specific details in the Fortran and Python
worlds differ.

Also, Beliavsky, thanks for your report on the pertinent
Fortran compilers.  There *are* other proprietary Fortan
compilers extant; do you expect them to fade away,
leaving only g* and Intel, or are you simply remarking
on those two as the (intellectual) market leaders?


From ptmcg at austin.rr.com  Sat Mar 17 18:26:59 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 17 Mar 2007 15:26:59 -0700
Subject: Still the __new__ hell ...
In-Reply-To: <1174167360.522350@jubilee.claranet.pt>
References: <1174167360.522350@jubilee.claranet.pt>
Message-ID: <1174170419.213275.213890@e1g2000hsg.googlegroups.com>

On Mar 17, 4:31 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Sorry to put here too many questions about __init__ __new__
> stuff but I always found a new problem when using them.
> I have searched for simple __new__ docs on how to do the
> basic things but find none.
>
> After trying the solutions people gently posted here
> (thanks) I run into new trouble when I go with further
> development.
>
> Here is the new situation.
>
> As suggested in a previous post, I used __new__ to
> subclass date class but now cPickle/pickle loads
> does not work.
>
> from datetime import date
> import cPickle,string
>
> class MyDate(date):
>         def __new__(cls,year,month=None,day=None):
>                 if type(year) is str:
>                         year,month,day=map(int,string.split(year,'-'))
>                 if year<100:
>                         year+=2000
>                 return date.__new__(cls,year,month,day)
>
> class C1(object):
>         def __init__(self):
>                 self.x=MyDate("2007-3-15")
>
>         def f(self):
>                 print self.x
>
> c1=C1()
>
> d=cPickle.dumps(c1)
> c2=cPickle.loads(d)
> c2.f()
>
> 1. year is passed to __new__ as a string but with invalid
> contents!
>
> 2. If I had a __new__ in class C1, cPickle.loads invokes it
> with only one parameter. This forces to allow __new__ accept
> only 1 parameter (cls) which I don't want for the normal
> situation.
>
> Thanks for your patience.
> Paulo

Any special reason you have to use __new__ for this factory method?
This version works, without the problems with __new__:

def getDate(*args):
    if isinstance(args[0],basestring):
        year,month,day = map(int,string.split(args[0],'-'))
    else:
        year,month,day = args
    if year < 100:
        year += 2000
    return date(year,month,day)

class C1(object):
        def __init__(self):
                #self.x=MyDate("2007-3-15")
                self.x = getDate("2007-3-15")

        def f(self):
                print self.x


-- Paul



From mailmaverick666 at gmail.com  Tue Mar 13 05:57:33 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Tue, 13 Mar 2007 15:27:33 +0530
Subject: Starting an external, independent process from a script
In-Reply-To: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
References: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
Message-ID: <180b672e0703130257w281a182kc722ad2b705c68f2@mail.gmail.com>

You can do something like this:
pid = os.fork()
if pid != 0:
    os.execl("mencoder variables here and its arguments")
else:
    continue
exec will replace the current child process with the given command and as we
are doing fork the command will get executed in a child process.You can also
use os.system there

On 12 Mar 2007 16:13:51 -0700, Henrik Lied <henriklied at gmail.com> wrote:
>
> Hi there!
>
> I'm trying to create a video uploading service (just to learn). The
> system is mostly based on Django, but the question I'm looking an
> answer for is more related to Python.
>
> So, the user gets to upload a video file. This can either be a mpg,
> avi or mp4-file. When the file is saved to its location, I want to
> convert it to FLA (Flash Video). I'm currently using Mplayers
> Mencoder, and this works great. The Mencoder is retrieved through
> running os.system("mencoder variables here")
>
> The problem with this is that the user has to wait until the movie is
> done encoding until he can go around with his business. I don't look
> upon this as ideal.
>
> So - I want to spawn a new system process. I need some good pointers
> on how to do this right.
>
> Any input? :-)
>
> Thanks a lot in advance!
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From gagsl-py2 at yahoo.com.ar  Fri Mar  9 07:53:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 09:53:46 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<1173426599.403173.49240@v33g2000cwv.googlegroups.com>
	<mailman.4845.1173430612.32031.python-list@python.org>
	<1173436219.937145.12550@64g2000cwx.googlegroups.com>
	<mailman.4850.1173438054.32031.python-list@python.org>
	<1173438858.819893.268240@n33g2000cwc.googlegroups.com>
Message-ID: <op.tow93w1cx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 09 Mar 2007 08:14:18 -0300, Gerard Flanagan  
<grflanagan at yahoo.co.uk> escribi?:

> Mea culpa.

Ego te absolvo in nomine Patris Guidii et Filii Python et Spiritus Sancti  
Computatorium.

-- 
Gabriel Genellina



From phil at riverbankcomputing.co.uk  Sun Mar 18 18:07:41 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sun, 18 Mar 2007 22:07:41 +0000
Subject: python QT or python-GTK
In-Reply-To: <45fdb561$0$17201$4c368faf@roadrunner.com>
References: <45fdb561$0$17201$4c368faf@roadrunner.com>
Message-ID: <200703182207.41196.phil@riverbankcomputing.co.uk>

On Sunday 18 March 2007 9:55 pm, Jon Van DeVries wrote:
> ** All the posts found in google are old.  I'm assuming new improvements
> have been made to both IDEs. **
>
> Please correct me if I'm wrong, I'm a newbie.
>
> 1. Which one of them requires fewer lines to accomplish the same thing?
> from what I understand QT it's just like Borland J-Builder. Meaning, you
> want a button, you draw it, then you double-click on it, a window opens up
> and you type events and behavior. And with GTK, you just type everything.
>
> 2. Which one is cross platform? (Linux, MacOS, Windows,etc).
>
> 3. Which one has more widgets?
>
> 4. Which one is the easiest to pick up?  I tried perl-QT and oh boy that
> mother is cryptic.
>
> 5. Which one has a bigger support community?
>
> 6. or if you think both pythonQT and PythonGTK are junk please suggest the
> one you like/use? I work on a Linux platform with Python 2.4.

A good start would be to appreciate that both PyQt and PyGTK are GUI toolkits. 
Neither are IDEs.

Phil


From nagle at animats.com  Thu Mar  8 00:24:17 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 05:24:17 GMT
Subject: merits of Lisp vs Python
In-Reply-To: <fXMHh.717$R61.393@bignews1.bellsouth.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
Message-ID: <56NHh.1217$FG1.248@newssvr27.news.prodigy.net>

Brian Adkins wrote:
> alex23 wrote:
> 
>> John Nagle wrote:
>>
>>> Hosting providers and distro
>>> makers aren't concerned over whether Python works.  They
>>> care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
>>> Ask them.
>>
>>
>> Do you have any real experience with recent linux distros? Or with any
>> _real_ hosting providers?

    Do you?  You're writing from a gmail account, not your own site.

    I have four hosting accounts with EZpublishing and a dedicated server
at Aplus.net.  I spent weeks trying to find a hosting provider that
would provide a Python environment that "just works", like everyone
does for Perl.  What you typically get is a basic Python 2.4,
and a refusal to install more packages, because it's so time-consuming.
Or a quote of $50 to $150 per hour to install Python packages.

    There are a very few hosting providers that actually want to provide
Python hosting, such as Hard Hat Hosting.  But most don't.
>>
>> Because what you've said is clearly not true. Just because the
>> situation isn't as easy _for you_ as you would like, doesn't mean that
>> Python is being ignored to the extent you're trying to claim.

    I don't see any evidence to back up this unsubstantiated claim.

				John Nagle


From jgodoy at gmail.com  Sun Mar  4 12:53:58 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 04 Mar 2007 14:53:58 -0300
Subject: How use XML parsing tools on this one specific URL?
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <87zm6s3nex.fsf@gmail.com>

"seberino at spawar.navy.mil" <seberino at spawar.navy.mil> writes:

> I understand that the web is full of ill-formed XHTML web pages but
> this is Microsoft:

Yes...  And Microsoft is responsible for a lot of the ill-formed pages on the
web be it on their website or made by their applications. 
>
> http://moneycentral.msn.com/companyreport?Symbol=BBBY
>
> I can't validate it and xml.minidom.dom.parseString won't work on it.
>
> If this was just some teenager's web site I'd move on.  Is there any
> hope avoiding regular expression hacks to extract the data from this
> page?

It all depends on what data you want.  Probably a non-validating parser would
be able to extract some things.  Another option is pass the page through some
validator that can fix the page, like tidy... 


-- 
Jorge Godoy      <jgodoy at gmail.com>


From slm_guzel at hotmail.com  Sun Mar 25 14:09:54 2007
From: slm_guzel at hotmail.com (gslm)
Date: 25 Mar 2007 11:09:54 -0700
Subject: a calendar example
Message-ID: <1174846194.616548.210390@p15g2000hsd.googlegroups.com>

Hi!
I want to do a calendar where pictures on.Can you have any free
example like this which can help me ?
Regards...



From arkanes at gmail.com  Tue Mar  6 12:19:52 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 11:19:52 -0600
Subject: Project organization and import
In-Reply-To: <1173200953.714165.157200@h3g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
Message-ID: <4866bea60703060919u26e8c29clff32dcbbd8521abf@mail.gmail.com>

On 6 Mar 2007 09:09:13 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 6, 6:07 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > Because you're advocating single class per file.
>
> What I actually said was "Smallest practical functional block." I
> never said one class per file, in fact I generally have more than one
> class per file. Nonetheless I frequently have a class which has the
> same name as the file it's contained in, which is where I start having
> trouble.

You do? Or do you only have trouble because you don't like using "from
foo import Foo" because you need to do more work to reload such an
import?

>
> > What you said was  A scan through the
> > standard library may be instructive, where there are some modules that
> > expose a single class (StringIO, pprint) and others that expose many,
> > and some that expose none at all.
>
> AHA! Here we see the insidious Python package system at work! ;)
>
> I said "file" and you assume that I am talking about the exposed
> namespace. Files should not have to be isomorphic with namespace! A
> package that exposes many classes may still use one class per file if
> it wants to.
>

What makes you think that the exposed namespace has to be isomorphic
with the filesystem? Further, why do you think doing so is bad? People
do it because it's convenient and simple, not because its necessary.
Why don't you like filesystems?

> > In any
> > case, as I hinted at, I prefer an organic, developer driven approach
> > to deciding these things, not handed down from above style guidelines.
>
> PRECISELY. And in the case of Python, package stucture is dictated,
> not by a style guideline, but by the design flaws of Python's package
> system.
>

What design flaws are those? Is it because you're trying to have
packages as part of your project without installing them on your
PYTHONPATH somewhere?

If you want to break a module internally into multiple files, then
make it a package. To an importer, they're almost indistinguishable.
If you want to break a module into multiple packages and then stick
the files that make up the package in bizarre spots all over the
filesystem, can you give a reason why?


From mail at timgolden.me.uk  Mon Mar  5 04:44:31 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 05 Mar 2007 09:44:31 +0000
Subject: MS SQL Database connection
In-Reply-To: <1173047639.166841.301030@h3g2000cwc.googlegroups.com>
References: <1173047639.166841.301030@h3g2000cwc.googlegroups.com>
Message-ID: <45EBE67F.5010803@timgolden.me.uk>

Hitesh wrote:
> Hi currently I am using DNS and ODBC to connect to MS SQL database.
> Is there any other non-dns way to connect? If I want to run my script
> from different server  I first have to create the DNS in win2k3.

Here are several ways to connect to an MSSQL database w/o
having to create "DNS" or anything else in win2k3 ;)

There are other ways (the slightly stale MSSQL module
from Object Craft, for example, which still works fine
for Python <= 2.3).

TJG

<code>
def adodbapi_connection (server, database, username, password):
   #
   # http://adodbapi.sf.net
   #
   import adodbapi
   connectors = ["Provider=SQLOLEDB"]
   connectors.append ("Data Source=%s" % server)
   connectors.append ("Initial Catalog=%s" % database)
   if username:
       connectors.append ("User Id=%s" % username)
       connectors.append ("Password=%s" % password)
   else:
       connectors.append("Integrated Security=SSPI")
   return adodbapi.connect (";".join (connectors))

def pymssql_connection (server, database, username, password):
   #
   # http://pymssql.sf.net
   #
   import pymssql
   if not username:
     raise RuntimeError, "Unable to use NT authentication for pymssql"
   return pymssql.connect (user=username, password=password, 
host=server, database=database)

def pyodbc_connection (server, database, username, password):
   #
   # http://pyodbc.sf.net
   #
   import pyodbc
   connectors = ["Driver={SQL Server}"]
   connectors.append ("Server=%s" % server)
   connectors.append ("Database=%s" % database)
   if username:
       connectors.append ("UID=%s" % username)
       connectors.append ("PWD=%s" % password)
   else:
       connectors.append ("TrustedConnection=Yes")
   return pyodbc.connect (";".join (connectors))

</code>


From nagle at animats.com  Sun Mar 25 20:27:45 2007
From: nagle at animats.com (John Nagle)
Date: Sun, 25 Mar 2007 17:27:45 -0700
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
In-Reply-To: <1174862657.151504.136350@b75g2000hsg.googlegroups.com>
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
	<874po95hz5.fsf@gmail.com>
	<1174862657.151504.136350@b75g2000hsg.googlegroups.com>
Message-ID: <KrENh.1571$Rg4.1085@newssvr19.news.prodigy.net>

mark at agtechnical.co.uk wrote:
> Great, thanks so much for posting that. It's worked a treat and I'm
> getting HTML files with the list of h2 tags I was looking for. Here's
> the code just to share, what a relief :)   :
> ...............................
> from BeautifulSoup import BeautifulSoup
> import re
> 
> page = open("soup_test/tomatoandcream.html", 'r')
> soup = BeautifulSoup(page)
> 
> myTagSearch = str(soup.findAll('h2'))
> 
> myFile = open('Soup_Results.html', 'w')
> myFile.write(myTagSearch)
> myFile.close()
> 
> del myTagSearch
> ...............................
> 
> I do have two other small queries that I wonder if anyone can help
> with.
> 
> Firstly, I'm getting the following character: "[" at the start, "]" at
> the end of the code. Along with "," in between each tag line listing.
> This seems like normal behaviour but I can't find the way to strip
> them out.

Ah.  What you want is more like this:

page = open("soup_test/tomatoandcream.html", 'r')
soup = BeautifulSoup(page)
htags = soup.findAll({'h2':True, 'H2' : True}) # get all H2 tags, both cases

myFile = open('Soup_Results.html', 'w')

for htag in htags :	# for each H2 tag
     texts = htag.findAll(text=True) # find all text items within this h2
     s = ' '.join(texts).strip()	+ '\n'	# combine text items into clean string
     myFile.write(s) # write each text from an H2 element on a line.

myFile.close()

				John Nagle


From michael at jedimindworks.com  Thu Mar 29 08:22:50 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 29 Mar 2007 07:22:50 -0500
Subject: Weird behavior in search in a list
In-Reply-To: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
Message-ID: <6E125C32-13B7-4267-8CA3-6D2BF21D4F81@jedimindworks.com>


On Mar 29, 2007, at 6:51 AM, Su Y wrote:
>
> I want find the first number in extend[] which is larger than num, so
> I wrote:
> def find(num):
>     count=0
>     for elem in extend:
>         if elem<num:
>             count+=1
>     return count
>
> I found that if extend[] is monotonous, like [1.1, 2.3, 3.2, 4.5,
> 5.6],
> it works fine: find(4) returns 3, extend[3] is 4.5.
> But, if extend[] is not monotonous, like [1.1, 2.3, 3.2, 4.5, 5.6,
> 4.6, 3.4, 2.1, 0.3],
> find(4) returns 6, extend[6] is 3.4!
>
> what's going on here? I really can't understand....

find() loops through the list, and every time it finds a value less  
than num it increments count.  So in your second example the values  
1.1, 2.3, 3.2,  3.4, 2.1, and 0.3 are all less than 4, which means  
count will be 6.

As you learned, a sorted list behaves as you expect.  So one approach  
is to sort your list first.  But another perhaps better approach is  
to do something like:

def find(num):
	# check to make sure there *is* a value greater than num
	if max(extend) > num:
		# then return the smallest value that is greater than num
		return min([x for x in extend if x > num])
	else:
		return None

Hope this helps,
Michael


From rodin.alexander at gmail.com  Thu Mar 15 04:35:56 2007
From: rodin.alexander at gmail.com (inline)
Date: 15 Mar 2007 01:35:56 -0700
Subject: Constructor of object
In-Reply-To: <mailman.5110.1173903066.32031.python-list@python.org>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
	<mailman.5097.1173895676.32031.python-list@python.org>
	<1173897975.419864.306930@b75g2000hsg.googlegroups.com>
	<mailman.5110.1173903066.32031.python-list@python.org>
Message-ID: <1173947756.118692.37710@b75g2000hsg.googlegroups.com>

Thanks. But can I change returned by xml.get_widget() object type from
gtk.Window to HelloWindow?



From tjreedy at udel.edu  Sat Mar 17 14:46:37 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 Mar 2007 14:46:37 -0400
Subject: Odd error
References: <1174109684.594766.320600@l77g2000hsb.googlegroups.com><1174123848.763283.54840@e65g2000hsc.googlegroups.com>
	<1174156377.840487.302740@l75g2000hse.googlegroups.com>
Message-ID: <ethd2b$cjr$1@sea.gmane.org>


<Joshua.R.English at gmail.com> wrote in message 
news:1174156377.840487.302740 at l75g2000hse.googlegroups.com...
|I installed it using the regular download form python.org.  I went
| back and did a lot of testing with the file, commenting out most of
| it, seeing what would actually run, and it seems I had a normal
| semantic error:
|
| self.data(one).append(item)
|
| and data is in fact a dictionary, not a callable object.  What gets me
| is the massive red herring this error is.  I wasn't doing anything
| with ntpath in the script.  The script selectively extracts
| information from an XML file, that's all.

When you run a script from IDLE, it saves it to disk, and in the process of 
saving, IDLE looks at the path.  I don't think your script ever ran.  At 
least that is what I gathered from the traceback.  I agree with JM: the 
traceback and error message do not match, so this is indeed an 'odd' error.

Terry Jan Reedy





From inq1ltd at verizon.net  Fri Mar 16 18:15:38 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 16 Mar 2007 18:15:38 -0400
Subject: SQLite3, data not found
In-Reply-To: <200703161755.58549.inq1ltd@verizon.net>
References: <200703161755.58549.inq1ltd@verizon.net>
Message-ID: <200703161815.38314.inq1ltd@verizon.net>




from John Clark
use con.commit()

Thanks John, 
this works
jim-on-linux




On Friday 16 March 2007 17:55, jim-on-linux wrote:
> Python help,
>
> I just started working with SQLite3 and ran
> into this problem.
>
> Below, the first select produces results but,
> after closing then re-opening the database the
> select produces an empty list.  Anyone know the
> reason ??
>
> The table seems to be empty.
>
>
>
> import sqlite3
> con = sqlite3.connect('myData')
> cursor = con.cursor()
>
> cursor.execute ("""create table data
>                        (recordNo varchar,
>                        caseNo varchar)""");
>
> record = ['A', 'B']
>
> cursor.execute("insert into data values (?,?)",
> record ) ;
>
> cursor.execute("select * from data ");
> print cursor.fetchall();
> con.close()
>
> con = sqlite3.connect('myData')
> cursor = con.cursor()
> cursor.execute("select * from data");
> print cursor.fetchall();
>
>
> jim-on-linux


From gherron at islandtraining.com  Thu Mar 15 11:38:34 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Thu, 15 Mar 2007 08:38:34 -0700
Subject: Pickle Problem
In-Reply-To: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
Message-ID: <45F9687A.1000601@islandtraining.com>

tonyr1988 wrote:
> I'm a complete python n00b writing my first program (or attempting to,
> anyway). I'm trying to make the transition from Java, so if you could
> help me, it would be greatly appreciated. Here's the code I'm stuck on
> (It's very basic):
>
> class DemoClass:
> 	def __init__(self):
> 		self.title = ["Hello", "Goodbye"]
>
> 	def WriteToFile(self, path = "test.txt"):
> 		fw = file(path, "w")
> 		pickle.dump(self.title, fw)
> 		fw.close()
>
> if __name__=='__main__':
> 	x = DemoClass
> 	x.WriteToFile
>
> It doesn't do any file I/O at all (that I see). I hope my syntax is
> alright. If I just call WriteToFile, shouldn't it perform with the
> default path? It gives me no errors and pretends to execute just fine.
>   
Several people have pointed out the problem, but when you get that 
fixed, I see another bit of trouble.   The pickle format is a binary 
format (be default), but you don't open the file in binary mode.   On 
Unix the distinction is (wisely) irrelevant, but on Windows you should 
open the file with a mode of "wb" not just "w".



From arnodel at googlemail.com  Tue Mar 13 15:21:54 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 13 Mar 2007 12:21:54 -0700
Subject: Iterating across a filtered list
In-Reply-To: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
Message-ID: <1173813714.767225.164790@q40g2000cwq.googlegroups.com>

On Mar 13, 6:04 pm, "Drew" <olso... at gmail.com> wrote:
> All -
Hi!

[snip]
> http://pastie.caboo.se/46647

There is no need for such a convoluted list comprehension as you
iterate over it immediately!  It is clearer to put the filtering logic
in the for loop.  Moreover you recalculate the regexp for each element
of the list.  Instead I would do something like this:

def find(search_str, flags=re.IGNORECASE):
    print "Contact(s) found:"
    search = re.compile(search_str, flags).search
    for name, contact in self.contacts.items():
        if search(name):
            print contact
    print

Although I would rather have one function that returns the list of all
found contacts:

def find(search_str, flags=re.IGNORECASE):
    search = re.compile(search_str, flags).search
    for name, contact in self.contacts.items():
        if search(name):
            yield contact

And then another one that prints it.

> Side note: I'm learning python after ruby experience. In ruby I would
> do something like:
>
> contacts.find_all{|name,contact| name =~ /search/}.each{|name,contact|
> puts contact}

And that's why you're right to learn Python ;)

HTH

--
Arnaud





From sjmachin at lexicon.net  Wed Mar 14 17:34:36 2007
From: sjmachin at lexicon.net (John Machin)
Date: 14 Mar 2007 14:34:36 -0700
Subject: most complete xml package for Python?
In-Reply-To: <mailman.5089.1173890827.32031.python-list@python.org>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
Message-ID: <1173908076.351577.75000@n59g2000hsh.googlegroups.com>

On Mar 15, 3:45 am, Steve Holden <s... at holdenweb.com> wrote:
> Paul Boddie wrote:
> > On 14 Mar, 16:15, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> >> metaperl wrote:
> >>> Without even checking them all out, I'm thinking the Amara XML Toolkit
> >>> must be the most feature-packed.
> >> Please check out lxml before you post FUD like this.
>
> >>http://codespeak.net/lxml/
>
> > Calm down, Stefan! The inquirer must have got the impression of
> > Amara's superiority from somewhere; all you need to do is to discover
> > which resource gave that impression and balance the situation out. In
> > any case, it's an opinion: there's no fear involved, and the only
> > uncertainty and doubt are in the inquirer's mind, which I suppose is
> > why they posted the inquiry.
>
> Although the phrase "without even checking them all out" hardly lends
> credence to the OP's assertion of Amara's superiority, and does tend to
> support a hypothesis involving some ulterior motive (or would if less
> ingenuously done).
>

Given keywords like "Amara" and "Elementtree" and past history, it
looked to me like a troll of one kind trying to incite a troll of
another kind to pop out from under the bridge and chew on his
ankle :-)




From paul at boddie.org.uk  Thu Mar  1 05:46:37 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 1 Mar 2007 02:46:37 -0800
Subject: installing "pysqlite"
In-Reply-To: <1172741654.589821.255220@v33g2000cwv.googlegroups.com>
References: <9258d$45e3fa5d$9117fe9b$16503@news2.tudelft.nl>
	<1172576685.560386.306740@m58g2000cwm.googlegroups.com>
	<639dd$45e5625a$9117fe9b$1180@news1.tudelft.nl>
	<1172663495.011225.76410@v33g2000cwv.googlegroups.com>
	<1172741654.589821.255220@v33g2000cwv.googlegroups.com>
Message-ID: <1172745997.863121.96940@8g2000cwh.googlegroups.com>

On 1 Mar, 10:34, "Nader" <n.em... at gmail.com> wrote:
>
> I have expanded the LD_LIBRARY_PATH to my home lib (export
> LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:/usr/people/emami/lib).
> I have built and installed the 'pysqlite-2.3.3' with the next
> 'setup.cfg' :
>
> [build_ext]
> define=
> include_dirs=/usr/people/emami/include
> library_dirs=/usr/people/emami/lib
> #libraries=/usr/people/emami/lib/libsqlite3.so  (this line as a
> comment)

This looks alright. Be sure to verify that libsqlite3.so is in /usr/
people/emami/lib, although I suppose you've done this, looking at your
comment.

> The resutl of this process was:
>
> running install_lib
> copying build/lib.linux-i686-2.4/pysqlite2/_sqlite.so -> /usr/people/
> emami/lib/python2.4/site-packages/pysqlite2
> running install_data
>
> This message had given after installing. I have controll the '/usr/
> people/emami/lib/python2.4/site-packages/pysqlite2' whether the
> '_sqlite.so' has copied there. Yes it has. Okay!

So pysqlite2 has installed properly at least.

> I go to python and I give the next command:
>
> >>> from pysqlite import test
>
> and Unfortunately I get the next error message:

[...]

> ImportError: /usr/people/emami/lib/python2.4/site-packages/pysqlite2/
> _sqlite.so: undefined symbol: sqlite3_set_authorizer

I'm running out of ideas here, but you could try doing this:

ldd /usr/people/emami/lib/python2.4/site-packages/pysqlite2/_sqlite.so

This should show a list of references to libraries, but if one of them
is missing in some way then it means that it isn't found by the linker
and it's not on the LD_LIBRARY_PATH. Another thought is that
sqlite3_set_authorizer isn't found in the SQLite library - you can
test this by doing the following:

nm /usr/people/emami/lib/libsqlite3.so

I get something like this in response:

00000000000110b0 T sqlite3_set_authorizer

If you don't get anything in response or if you see "U" instead of
"T", then this might indicate an problem with the way SQLite has been
configured.

> Do you know what option I have to give to if I want to use the
> 'easy_install" tool?
> %easy_install pysqlite (with some optione with which it cab find the
> installed 'libsqlite.so')

I'm no easy_install expert, I'm afraid. You might want to talk to the
pysqlite people directly if what I've suggested doesn't help you
further:

http://www.initd.org/tracker/pysqlite/wiki/pysqlite

Paul



From hardcoded.software at gmail.com  Wed Mar 21 22:13:42 2007
From: hardcoded.software at gmail.com (Virgil Dupras)
Date: 21 Mar 2007 19:13:42 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <mailman.5434.1174529222.32031.python-list@python.org>
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<mailman.5432.1174527485.32031.python-list@python.org>
	<1174528562.192439.84480@l77g2000hsb.googlegroups.com>
	<mailman.5434.1174529222.32031.python-list@python.org>
Message-ID: <1174529622.860892.133800@d57g2000hsg.googlegroups.com>

On Mar 21, 10:05 pm, Steve Holden <s... at holdenweb.com> wrote:
> Virgil Dupras wrote:
> > On Mar 21, 9:24 pm, Steve Holden <s... at holdenweb.com> wrote:
> >> Marcin Ciura wrote:
> >>> Steven D'Aprano wrote:
> >>>>>>> x, y, z = 1, 2, 3
> >>>>>>> x = y = z
> >>>>>>> x, y, z
> >>>> (3, 3, 3)
> >>>> I certainly wouldn't expect to get (2, 3, 3).
> >>> Neither would I. I must have expressed myself not clearly enough.
> >>> Currently
> >>> x = y = z
> >>> is roughly equivalent to
> >>> x = z
> >>> y = z
> >>> I propose to change it to
> >>> y = z
> >>> x = z
> >>> Cheers,
> >>>    Marcin
> >> The difference being ... ?
> >> --
> >> Steve Holden       +44 150 684 7255  +1 800 494 3119
> >> Holden Web LLC/Ltd          http://www.holdenweb.com
> >> Skype: holdenweb    http://del.icio.us/steve.holden
> >> Recent Ramblings      http://holdenweb.blogspot.com
>
> > I think I see what Marcin means. The 'node' is changed too fast in the
> > chain, and next is assigned to 'nextnode' instead of being assigned to
> > node.
>
> >>>> class Node:
> > ...     pass
> > ...
> >>>> node = Node()
> >>>> nextnode = Node()
> >>>> backup_node = node
> >>>> node = node.next = nextnode
> >>>> node.next is node
> > True
> >>>> hasattr(backup_node,'next')
> > False
>
> So we should take the already well-defined semantics of assignment and
> change them because it seems more obvious to J. Random User? I think I
> might be a little concerned about potential code breakage there.
>
> regards
>   Steve
> --
> Steve Holden       +44 150 684 7255  +1 800 494 3119
> Holden Web LLC/Ltd          http://www.holdenweb.com
> Skype: holdenweb    http://del.icio.us/steve.holden
> Recent Ramblings      http://holdenweb.blogspot.com

I totally agree. This assignment is way too ambiguous anyway.
Readability first. I just wanted to enlighten the readers on what the
problem actually was since it wasn't obvious in the original post.



From tew24 at spam.ac.uk  Wed Mar 21 09:13:29 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 13:13:29 +0000
Subject: Garbage collection
Message-ID: <etrb1q$t01$1@gemini.csx.cam.ac.uk>

Hi all

I suspect I may be missing something vital here, but Python's garbage
collection doesn't seem to work as I expect it to.  Here's a small test
program which shows the problem on python 2.4 and 2.5:

$ python2.5
Python 2.5 (release25-maint, Dec  9 2006, 15:33:01) 
[GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-20)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

(at this point, Python is using 15MB)

>>> a = range(int(1e7))
>>>

(at this point, Python is using 327MB)

>>> a = None
>>>

(at this point, Python is using 251MB)

>>> import gc
>>> gc.collect()
0
>>>

(at this point, Python is using 252MB)


Is there something I've forgotten to do? Why is Python still using such a
lot of memory?


Thanks!

-- 
I'm at CAMbridge, not SPAMbridge


From carsten at uniqsys.com  Fri Mar 23 13:10:50 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Fri, 23 Mar 2007 13:10:50 -0400
Subject: Multi-line strings with formatting
In-Reply-To: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>
References: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>
Message-ID: <1174669850.3450.40.camel@dot.uniqsys.com>

On Fri, 2007-03-23 at 09:54 -0700, gburdell1 at gmail.com wrote:
> When constructing a particularly long and complicated command to be
> sent to the shell, I usually do something like this, to make the
> command as easy as possible to follow:
> 
> commands.getoutput(
>     'mycommand -S %d -T %d ' % (s_switch, t_switch)   +
>     '-f1 %s -f2 %s '         % (filename1, filename2) +
>     '> %s'                   % (log_filename)
>     )
> 
> Can anyone suggest a better way to construct the command, especially
> without the "+" sign at the end of each line (except the last) ? If I
> take out the "+", then I need to move all the variables to the end, as
> so:
> 
> commands.getoutput(
>     'mycommand -S %d -T %d '
>     '-f1 %s -f2 %s '
>     '> %s'
>     % (s_switch, t_switch, filename1, filename2, log_filename)
>     )
> 
> or:
> 
> commands.getoutput(
>     '''mycommand -S %d -T %d \
>     -f1 %s -f2 %s \
>     > %s'''
>     % (s_switch, t_switch, filename1, filename2, log_filename)
>     )

You get the best of both worlds, i.e. one big multiline string with
in-line parameters, by using a mapping:

commands.getoutput(
   '''mycommand -S %(s_switch)d -T %(t_switch)d \
    -f1 %(filename1)s -f2 %(filename2)s \
    > %(log_filename)s'''
    % locals() )

Of course I'm assuming that s_switch etc. are local variables. If
they're not, well, they ought to be.

-Carsten




From exarkun at divmod.com  Mon Mar 19 11:59:39 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 19 Mar 2007 10:59:39 -0500
Subject: Still the __new__ hell ...
In-Reply-To: <45fea0b3$0$15544$426a74cc@news.free.fr>
Message-ID: <20070319155939.18920.1857970362.divmod.quotient.3961@ohm>

On Mon, 19 Mar 2007 15:39:49 +0100, Bruno Desthuilliers <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>Jean-Paul Calderone a ?crit :
>> On Mon, 19 Mar 2007 13:17:11 +0100, Bruno Desthuilliers
>>>
>>> [snip]
>>>
>>> And what if it's a unicode string ?
>>> The correct idiom here is:
>>>                  if isinstance(year, basestring):
>>>
>>>>             year,month,day=map(int,string.split(year,'-'))
>>>                         year, month, day = map(int, year.split('-'))
>>
>> And what if it's another kind of string?
>
>One that doesn't inherit from basestring ?
>
>>  The correct idiom is:
>>
>>   try:
>>       parts = year.split('-')
>>   except AttributeError:
>>       # Handle int case
>>   else:
>>       year, month, day = map(int, parts)
>>
>>>
>>>>         if year < 100:
>>>>             year += 2000
>>>>         return date.__new__(cls,year,month,day)
>>>>
>
>And what if it's an object that has nothing to do with a string but
>happens to have a split() method ?-)
>
>>> (snip)
>
>Jean-Paul, you're of course right from a theoretical POV. Practically
>speaking, chances that such a method will ever be fed with a string-like
>object not deriving from basestring are IMVHO *very* low. While I
>usually raise a big warning flag when I spot a test against
>isinstance(), I'd say this is an example of the few cases where it's ok.
>  YMMV of course...

http://mail.python.org/pipermail/python-dev/2005-February/051717.html

Jean-Paul


From samuel.kortas at gmail.com  Wed Mar 21 20:11:32 2007
From: samuel.kortas at gmail.com (Samkos)
Date: 21 Mar 2007 17:11:32 -0700
Subject: the second of nested buttons using textvariable remains void!
Message-ID: <1174522287.135371.26220@o5g2000hsb.googlegroups.com>

Hi there,

I am fighting with a problem I intended to  believe trivial that
I could not solve yet!

I am trying to have a button with a variable text, that
pops up another button with a variable text when pressed.

I did that with the following program  in Python, but the
second button remains always void!!! is it related to
the textvariable parameters?

If any of you had a clue, please  don't hesitate!

in advance, many thanks

Samuel

#----------------------- program 2 buttons.py
--------------------------

from Tkinter import *


def go(event):
    root = Tk()

    s1=StringVar()
    s1.set("s1")
    label1 = Label(root, textvariable=s1)
    label1.pack(side=LEFT)

    root.mainloop()



root = Tk()

s0=StringVar()
s0.set("s0")
label0 = Label(root, textvariable=s0)
label0.pack(side=LEFT)


root.bind("<Return>",go)

root.mainloop()



From http  Sat Mar 31 01:09:30 2007
From: http (Paul Rubin)
Date: 30 Mar 2007 22:09:30 -0700
Subject: Hpw make lists that are easy to sort.
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>
	<7xbqidgqy0.fsf@ruckus.brouhaha.com>
	<euenlj$oll$1@news4.zwoll1.ov.home.nl>
Message-ID: <7xtzw2xalx.fsf@ruckus.brouhaha.com>

Anton Vredegoor <anton.vredegoor at gmail.com> writes:
> I want the product, but sorted in less time. If Fourier transforms can
> help, I want them :-)

Oh, I see what you mean.  I don't see an obvious faster way to do it
and I don't have the feeling that one necessarily exists.  As someone
mentioned, you could do an n-way merge, which at least avoids using
quadratic memory.  Here's a version using Frederik Lundh's trick of
representing a lazy list as its head plus the generator for the tail:

    from heapq import heapify, heappop, heappush
    import random

    def sortedsums(L,R):
        # yield elements of [(i+j) for i in L for j in R] in sorted order
        # assumes L and R are themselves sorted
        def lundh(x):
            g = ((a+x) for a in L)
            return (g.next(), g)
        heap = [lundh(x) for x in R]

        heapify (heap)  # not sure this is needed

        while heap:
            z,zn = heappop(heap)
            try: heappush(heap, (zn.next(), zn))
            except StopIteration: pass
            yield z

    def test():
        L = sorted(random.sample(xrange(2000),150))
        R = sorted(random.sample(xrange(2000),150))

        t = sortedsums(L,R)
        t2 = sorted([(i+j) for i in L for j in R])
        assert list(t) == t2

    test()



From B.Ogryczak at gmail.com  Thu Mar  1 12:46:01 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 1 Mar 2007 09:46:01 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <1172764725.827624.298180@j27g2000cwj.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
	<1172764725.827624.298180@j27g2000cwj.googlegroups.com>
Message-ID: <1172771161.015437.50000@n33g2000cwc.googlegroups.com>

On Mar 1, 4:58 pm, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> On Mar 1, 8:53 am, "Bart Ogryczak" <B.Ogryc... at gmail.com> wrote:
>
>
>
> > On Mar 1, 7:52 am, "gregpin... at gmail.com" <gregpin... at gmail.com>
> > wrote:
>
> > > It seems like this would be easy but I'm drawing a blank.
>
> > > What I want to do is be able to open any file in binary mode, and read
> > > in one byte (8 bits) at a time and then count the number of 1 bits in
> > > that byte.
>
> > > I got as far as this but it is giving me strings and I'm not sure how
> > > to accurately get to the byte/bit level.
>
> > > f1=file('somefile','rb')
> > > while 1:
> > >     abyte=f1.read(1)
>
> > import struct
> > buf = open('somefile','rb').read()
> > count1 = lambda x: (x&1)+(x&2>0)+(x&4>0)+(x&8>0)+(x&16>0)+(x&32>0)+
> > (x&64>0)+(x&128>0)
> > byteOnes = map(count1,struct.unpack('B'*len(buf),buf))
>
> > byteOnes[n] is number is number of ones in byte n.
>
> This solution looks nice, but how does it work?  I'm guessing
> struct.unpack will provide me with 8 bit bytes


unpack with 'B' format gives you int value equivalent to unsigned char
(1 byte).

> (will this work on any system?)

Any system with 8-bit bytes, which would mean any system made after
1965. I'm not aware of any Python implementation for UNIVAC, so I
wouldn't worry ;-)

> How does count1 work exactly?

1,2,4,8,16,32,64,128 in binary are
1,10,100,1000,10000,100000,1000000,10000000
x&1 == 1 if x has first bit set to 1
x&2 == 2, so (x&2>0) == True if x has second bit set to 1
... and so on.
In the context of int, True is interpreted as 1, False as 0.



From bignose+hates-spam at benfinney.id.au  Wed Mar 14 23:05:29 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 15 Mar 2007 14:05:29 +1100
Subject: distributing python software in jar like fashion
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
Message-ID: <87odmv9pfq.fsf@benfinney.id.au>

alf <ask at me.xs4all.nl> writes:

> I have a small app which consist of a few .py files. Is there any
> way to distribute it in jar like fashion as a single file I can just
> run python on. I obviously look for platform independent solution.

Python eggs are the platform-independent distributable single-file
archive. Given the way Python works, you can't simply execute them
as-is; you can, however, easily install them.

    <URL:http://peak.telecommunity.com/DevCenter/EasyInstall>

-- 
 \         "I think it would be a good idea."  -- Mahatma Gandhi (when |
  `\                    asked what he thought of Western civilization) |
_o__)                                                                  |
Ben Finney



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 17:33:00 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 07 Mar 2007 23:33:00 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
Message-ID: <45ef3593$0$7504$426a74cc@news.free.fr>

Arnaud Delobelle a ?crit :
> Hi all,
> 
> Imagine I have three functions a(x), b(x), c(x) that each return
> something or raise an exception.  Imagine I want to define a function
> that returns a(x) if possible, otherwise b(x), otherwise c(x),
> otherwise raise CantDoIt.
> 
> Here are three ways I can think of doing it:
> 
> ----------
> # This one looks ugly

Yes.

> def nested_first(x):
>     try:
>         return a(x)
>     except:

<side-note>
Try avoiding bare except clauses. It's usually way better to specify the 
type(s) of exception you're expecting to catch, and let other propagate.
</side-note>

>         try:
>             return b(x)
>         except:
>             try:
>                 return c(x)
>             except:
>                 raise CantDoIt
> 
> # This one looks long-winded

Yes. And not's very generic.

> def flat_first(x):
>     try:
>         return a(x)
>     except:
>         pass
>     try:
>         return b(x)
>     except:
>         pass
>     try:
>         return c(x)
>     except:
>         raise CantDoIt
> 
> # This one only works because a,b,c are functions

It works with any callable. Anyway, what else would you use here ???

> # Moreover it seems like an abuse of a loop construct to me

Why so ? loops are made for looping, adn functions are objects like any 
other.

> def rolled_first(x):
>     for f in a, b, c:
>         try:
>             return f(x)
>         except:
>             continue
>     raise CantDoIt

Here's an attempt at making it a bit more generic (<side-note>it still 
lacks a way to specify which kind of exceptions should be silently 
swallowed</side-note>.

def trythese(*functions):
   def try_(*args, **kw):
     for func in functions:
        try:
          return func(*args, **kw)
        except: # FIX ME : bare except clause
          pass
     else:
       # really can't do it, sorry
       raise CantDoIt
   return try_

result = trythese(a, b, c)(x)

> ----------
> # This one isn't correct but looks the clearest to me
> def wished_first(x):
>     try:
>         return a(x)
>     except:
>         return b(x)
>     except:
>         return c(x)
>     except:
>         raise CantDoIt

Having multiple except clauses is correct - but it has another semantic.


> Note: I've chosen functions a, b, c, but really I'm looking for a way
> that is suitable for any chunk of code.

A function is an object wrapping a chunk of code...

I personnaly find the loop-based approach quite clean and pythonic.


From steven.bethard at gmail.com  Thu Mar  1 15:58:01 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 01 Mar 2007 13:58:01 -0700
Subject: class declaration shortcut
In-Reply-To: <1172780513.838701.136340@j27g2000cwj.googlegroups.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
	<YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
	<1172772214.569734.95990@n33g2000cwc.googlegroups.com>
	<1172780513.838701.136340@j27g2000cwj.googlegroups.com>
Message-ID: <2cOdnUbR46bKo3rYnZ2dneKdnZydnZ2d@comcast.com>

Luis M. Gonz?lez wrote:
> This is the closest we got so far to the intended result.
> If there was a way to enter attributes without quotes, it would be
> almost identical.

Ok, below is the Python code so that the following works::

     class Person(Struct): "name birthday children"

Note that
* The "Person" name is not repeated
* The attribute names are not individually quoted
* It's two characters shorter than the Ruby code::

     Person = Struct.new(:name, :birthday, :children)

Is that good enough? ;-)

STeVe

class InitFromSlots(type):
     def __new__(meta, name, bases, bodydict):
         slots = bodydict.get('__doc__', '').split()
         bodydict.setdefault('__slots__', slots)
         if slots and '__init__' not in bodydict:
             parts = ['def __init__(self, %s):' % ', '.join(slots)]
             for slot in slots:
                 parts.append('    self.%s = %s' % (slot, slot))
             exec '\n'.join(parts) in bodydict
         super_new =  super(InitFromSlots, meta).__new__
         return super_new(meta, name, bases, bodydict)

class Struct(object):
     __metaclass__ = InitFromSlots
     __slots__ = ()
     def _items(self):
         for name in self.__slots__:
             yield name, getattr(self, name)
     def __repr__(self):
         args = ', '.join('%s=%r' % tup for tup in self._items())
         return '%s(%s)' % (type(self).__name__, args)
     def __iter__(self):
         for name in self.__slots__:
             yield getattr(self, name)
     def __getstate__(self):
         return dict(self._items())
     def __setstate__(self, statedict):
         self.__init__(**statedict)


From paul at subsignal.org  Sat Mar 10 06:10:39 2007
From: paul at subsignal.org (paul)
Date: Sat, 10 Mar 2007 12:10:39 +0100
Subject: SQLite3 trapping OperationalError
In-Reply-To: <200703091314.49199.inq1ltd@verizon.net>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>	<op.tow2n71ux6zn5v@gabriel2.softlabbsas.com.ar>
	<200703091314.49199.inq1ltd@verizon.net>
Message-ID: <esu3nc$u2l$1@sea.gmane.org>

jim-on-linux schrieb:
> pyhelp,
> 
> I set up a table in SQLite3.
> 
> While running other modules I want to know if a  
> table exists.
> 
> SQL has a command "List Tables" but I don't think 
> SQLlite3 has this command.
I think "list tables" is a mysqlism

> 
> I've tried 
>    cursor.execute("select * from debtor where key
>     is not null ")
FROM sqlite_master SELECT name WHERE type='table';

cheers
 Paul



From newsgroups at nospam.nowire.org  Thu Mar 29 10:07:34 2007
From: newsgroups at nospam.nowire.org (=?ISO-8859-15?Q?Thomas_Kr=FCger?=)
Date: Thu, 29 Mar 2007 16:07:34 +0200
Subject: Problem with class variables
In-Reply-To: <slrnf0nfph.8f9.f98dawa@remote1.student.chalmers.se>
References: <slrnf0nfph.8f9.f98dawa@remote1.student.chalmers.se>
Message-ID: <eugh77$2po3$1@ariadne.rz.tu-clausthal.de>

Dag schrieb:
> I have a problem which is probaly very simple to solve, but I can't
> find a nice solution.
> I have the following code 
> 
> class Test:
>     def __init__(self):
>         self.a=[1,2,3,4]
>         self.b=self.a
>     def swap(self):
>         self.a[0],self.a[3]=self.a[3],self.a[0]
>     def prnt(self):
>         print self.a
>         print self.b
> c=Test()
> c.swap()
> c.prnt()
> 
> which returns 
> [4,2,3,1]
> [4,2,3,1]
> 
> Now I understand why it is doing this, but it's not what I want.  How to
> I get it to return
> [4,2,3,1]
> [1,2,3,4]
> 
> Dag 

Use a copy of self.a:
self.b = self.a[:]

Thomas


From http  Fri Mar  9 09:51:22 2007
From: http (Paul Rubin)
Date: 09 Mar 2007 06:51:22 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
Message-ID: <7x7itqqxlh.fsf@ruckus.brouhaha.com>

"cesco" <fd.calabrese at gmail.com> writes:
> I have to generate a list of N random numbers (integer) whose sum is
> equal to M. If, for example, I have to generate 5 random numbers whose
> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> simple pattern or function in Python to accomplish that?

Erm, yes, lots of ways, there are probably further constraints on the
problem, such as the size of the integers, how the lists are supposed
to be distributed, etc.  Can you be more specific?  Is this for an
application?  If it's a homework problem, that's fine, but it's better
in that case for respondents to suggest hints rather than full solutions.


From steve at holdenweb.com  Wed Mar 14 14:18:23 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 14:18:23 -0400
Subject: Grep Equivalent for Python
In-Reply-To: <1173894933.677887.176140@b75g2000hsg.googlegroups.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>	<mailman.5076.1173876678.32031.python-list@python.org>	<et8u0e$k2a$1@news2.u-psud.fr>	<pan.2007.03.14.15.57.44.398564@gmx.net>	<1173890256.024442.138840@e1g2000hsg.googlegroups.com>
	<1173894933.677887.176140@b75g2000hsg.googlegroups.com>
Message-ID: <et9ec7$3uq$1@sea.gmane.org>

tereglow wrote:
> Okay,
> 
> It is now working as follows:
> 
> memFile = open('/proc/meminfo')
> for line in memFile.readlines():
> 	if line.startswith("MemTotal"):
> 		memStr = line.split()
> 		memTotal = memStr[1]
> memFile.close()
> print "Memory: " + memTotal + "kB"
> 
> I'm learning the whole try, finally exception stuff so will add that
> in as well.  Now, I'm trying to figure out the CPU speed.  In shell,
> I'd do:
> 
> grep "^cpu MHz" /proc/cpuinfo | awk '{print $4}' | head -1
> 
> The "head -1" is added because if the server has 2 or more processors,
> 2 or more lines will result, and I only need data from the first
> line.  So, now I'm looking for the equivalent to "head (or tail" in
> Python.  Is this a case where I'll need to break down and use the re
> module?  No need to give me the answer, a hint in the right direction
> would be great though.
> 
> Thanks again,
> Tom
> 
If you are interested in a number of fields I'd create a dict or set 
containing the keys you are interested in. For each line, if the text 
indicates you are interested in the value then extract the value and 
store it in a dict against the text as a key.

Something like (untested):

kwdlist = "cpu MHz|MemTotal"
d = dict((x, None) for x in kwdlist.split("|"))
memFile = open('/proc/meminfo')
for line in memFile.readlines():
     keyword = line.split(":")[0]
     if keyword in d and d[keyword] is None:
         d[keyword] = line.split()[1]
memFile.close()

This should give you a dict with non-None values against the keywords 
you have found. Because of the "and d[keyword] is None" test you won;t 
overwrite an existing value, meaning you only see the first value for 
any given keyword.

Again, bear in mind this code is untested.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From newsgroups at nospam.nowire.org  Fri Mar 30 05:20:38 2007
From: newsgroups at nospam.nowire.org (=?ISO-8859-1?Q?Thomas_Kr=FCger?=)
Date: Fri, 30 Mar 2007 11:20:38 +0200
Subject: Indentation for code readability
In-Reply-To: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <euikp8$2dgn$1@ariadne.rz.tu-clausthal.de>

DE schrieb:
> Hello,
> 
> Here is what I do in C++ and can not right now in python :
> 
> pushMatrix()
> {
>      drawStuff();
> 
>      pushMatrix();
>      {
>             drawSomeOtherStuff()
>      }
>      popMatrix();
> }
> popMatrix();
> 
> The curly brackets have no functional meaning but increase the
> readability significantly. I want to be able to do the same thing in
> python. Since curly brackets are not available and indenting without
> an if or while conditional doesn't work, I have started to question if
> this is possible in python at all.
> 
> Any ideas ?

I've been thinking about that for some minutes now and I have doubts
that it will increase the readability. Maybe for you as you invented
that style but not for others.
There are a few standards for formatting C code and even this few have
cause many discussions between developers.
Python has one convention (defined in PEP 8) and the deeper you dive
into the language the more you will like it.
BTW: having one way to do it is one of the main ideas of Python's
philosophy.

Thomas


From deets at nospam.web.de  Fri Mar 30 08:08:10 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 30 Mar 2007 14:08:10 +0200
Subject: with timeout(...):
In-Reply-To: <slrnf0nodg.u8v.nick@irishsea.home.craig-wood.com>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<mailman.5697.1175060331.32031.python-list@python.org>
	<slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
	<571hbfF2a7ngiU1@mid.uni-berlin.de>
	<slrnf0nodg.u8v.nick@irishsea.home.craig-wood.com>
Message-ID: <574ctnF2b0iseU1@mid.uni-berlin.de>

Nick Craig-Wood schrieb:
> Diez B. Roggisch <deets at nospam.web.de> wrote:
>>> I beleive the convention is when calling an OS function which might
>>> block the global interpreter lock is dropped, thus allowing other
>>> python bytecode to run.
>>
>>  So what? That doesn't help you, as you are single-threaded here. The 
>>  released lock won't prevent the called C-code from taking as long as it 
>>  wants. |And there is nothing you can do about that.
> 
> I'm assuming that the timeout function is running in a thread...

I wouldn't assume that - it could be a python on a platform without threads.

I really don't think that your idea is worth the effort. If there is 
something that can be safely interrupted at any given point in time - 
which is the exception, not the rule - then one can "code around" that 
missing feature, by spawning a subprocess python, using pyro to 
communicate, and terminate it. I've done so before.

Some people here said "we're adults, we make sure our code will be 
safely interruptable". But first of all, even adults make errors, and 
even more important: most of the time such a feature is wanted, it's 
about limiting some scripts that come from an untrusted source - like 
user-written plugins. Such a feature would encourage people to use it in 
such cases, but not stand up for the nastiness it may provoke.

Diez


From martinunsal at gmail.com  Tue Mar  6 02:57:18 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 5 Mar 2007 23:57:18 -0800
Subject: Project organization and import
In-Reply-To: <1huivd7.7l18eh1paqp0aN%aleax@mac.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
	<1huivd7.7l18eh1paqp0aN%aleax@mac.com>
Message-ID: <1173167838.173634.62810@c51g2000cwc.googlegroups.com>

On Mar 5, 10:06 pm, a... at mac.com (Alex Martelli) wrote:
> My favorite way of working: add a test (or a limited set of tests) for
> the new or changed feature, run it, check that it fails, change the
> code, rerun the test, check that the test now runs, rerun all tests to
> see that nothing broke, add and run more tests to make sure the new code
> is excellently covered, rinse, repeat.  Occasionally, to ensure the code
> stays clean, stop to refactor, rerunning tests as I go.

>From the way you describe your workflow, it sounds like you spend very
little time working interactively in the interpreter. Is that the case
or have I misunderstood?

Martin



From steve at holdenweb.com  Thu Mar 22 18:49:31 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 18:49:31 -0400
Subject: Upgrading python question
In-Reply-To: <3AD132C2-B09B-4FF9-AA86-928DE171B634@mac.com>
References: <3AD132C2-B09B-4FF9-AA86-928DE171B634@mac.com>
Message-ID: <etv18d$f37$1@sea.gmane.org>

Tommy Grav wrote:
> I am currently using Activepython 2.4.4, but would like to upgrade to
> 2.5. Am I right in thinking that if I do that I need to reinstall all  
> the
> packages and modules (like numpy, scipy, pyfits, and so on)? Or is
> there a way to avoid that?
> 
> Cheers
>    Tommy
There's a decent chance that "pure Python" modules can be copied across 
to the new installation. Extension modules, however, with compiled C or 
C++ components, will need to be rebuilt or reinstalled.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From nogradi at gmail.com  Sun Mar 18 12:24:15 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 18 Mar 2007 17:24:15 +0100
Subject: list comprehension help
In-Reply-To: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
Message-ID: <5f56302b0703180924o3ebf61e2nb2d50280456f8448@mail.gmail.com>

> I need to process a really huge text file (4GB) and this is what i
> need to do. It takes for ever to complete this. I read some where that
> "list comprehension" can fast up things. Can you point out how to do
> it in this case?
> thanks a lot!
>
>
> f = open('file.txt','r')
> for line in f:
>         db[line.split(' ')[0]] = line.split(' ')[-1]
>         db.sync()

What is db here? Looks like a dictionary but that doesn't have a sync method.
If the file is 4GB are you sure you want to store the whole thing into
memory? In case yes and you want to store it in a list then you can
use list comprehension like this:

db = [ line.split(' ')[-1] for line in open('file.txt','r') ]

or

db = [ ( line.split(' ')[0], line.split(' ')[-1] ) for line in
open('file.txt','r') ]

depending on what exactly you want to store. But reading 4GB into
memory will be slow in any case. You can use the timeit module to find
out which method is fastest.

HTH,
Daniel


From taurelin at gmail.com  Fri Mar  9 11:55:16 2007
From: taurelin at gmail.com (Arne Jamtgaard)
Date: 9 Mar 2007 08:55:16 -0800
Subject: Problem with new Vista and os.system
Message-ID: <1173459316.361843.41010@c51g2000cwc.googlegroups.com>

I'm getting myself set up on a new Vista box at work, and one of my
old scripts has stopped working.

Specifically, all calls to os.system return a -1.  Whatever action I
was
asking os.system to run does not take place.

Is this a Vista thing, or perhaps just a wonky setting in my
environment?
I've installed the latest python (2.5) within the past two weeks...

I've double-checked other functions for os.* and they seem to work
from
the python command line - it's just os.system.

Arne



From http  Wed Mar  7 00:39:46 2007
From: http (Paul Rubin)
Date: 06 Mar 2007 21:39:46 -0800
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
References: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>
	<mailman.4703.1173163158.32031.python-list@python.org>
	<1173211320.042518.121890@8g2000cwh.googlegroups.com>
	<mailman.4737.1173245541.32031.python-list@python.org>
Message-ID: <7x1wk14nod.fsf@ruckus.brouhaha.com>

"Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:
> - same as above, but using a protocol sniffer to record the HTTP
> requests/responses. This may be needed if HTTP POST is used instead.

Usually studying the originating page is enough, or at worst use a
client side proxy to log the http session.  A protocol sniffer sounds
like too much trouble and I've never needed to resort to one for
something like this.  


From gtcopeland at gmail.com  Thu Mar  8 16:55:17 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 8 Mar 2007 13:55:17 -0800
Subject: SQLAlchemy and Oracle Functions?
In-Reply-To: <1173389744.483855.230520@q40g2000cwq.googlegroups.com>
References: <1173388785.133560.146300@p10g2000cwp.googlegroups.com>
	<1173389744.483855.230520@q40g2000cwq.googlegroups.com>
Message-ID: <1173390917.481411.89510@c51g2000cwc.googlegroups.com>

On Mar 8, 3:35 pm, "Giles Brown" <giles_br... at hotmail.com> wrote:
http://www.sqlalchemy.org/docs/sqlconstruction.myt#sql_whereclause_fu...
> SQLAlchemy has its own google group
>
> http://groups.google.co.uk/group/sqlalchemy
>
> You could try asking there too.
>
> Giles

Very nice.  That exactly answered by question.  It works!  Also, I
didn't know about the sqlalchemy group so I appreciate the heads up.

Thanks,

Greg




From carsten at uniqsys.com  Tue Mar 20 21:17:40 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 20 Mar 2007 21:17:40 -0400
Subject: mysterious unicode
In-Reply-To: <200703202026.34160.inq1ltd@verizon.net>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<200703202026.34160.inq1ltd@verizon.net>
Message-ID: <1174439860.3251.30.camel@localhost.localdomain>

On Tue, 2007-03-20 at 20:26 -0400, jim-on-linux wrote:
> I have been getting the same thing using SQLite3 
> when extracting data fron an SQLite3 database.

Many APIs that exchange data choose to exchange text in Unicode because
that eliminates encoding uncertainty. Whether an API uses Unicode would
probably be noted somewhere in its documentation.

>  I take the database info which is in a list and do
> 
> name = str.record[0]

You probably mean str(record[0]) .

> rather than 
> name = record[0]
> 
> So far, I havn't had any problems.
> For some reason the unicode u is removed.
> I havn't wanted to spend the time to figure out 
> why.

As a software engineer, I'd get worried if I didn't know why the code I
wrote works. Maybe that's just me.

Unicode is not rocket science. I suggest you read
http://www.amk.ca/python/howto/unicode to demystify what Unicode objects
are and do.

With str(), you're asking the Unicode object for its byte string
interpretation, which causes the Unicode object to give you its encoding
in the system default encoding. The default encoding is normally ascii.
That can be tweaked for your particular Python installation, but if you
need an encoding other than ascii it's recommended that you explicitly
encode and decode from and to Unicode, lest you risk writing
non-portable code.

Using str() coercion of Unicode objects will work well enough until you
run into a string that contains characters that can't be represented in
the default encoding. Once that happens, you're better off explicitly
encoding the Unicode object into a well-defined encoding on input, or,
even better, just work with Unicode objects internally and only encode
to byte strings when absolutely necessary, such as when outputting to a
file or to the console.

Hope this helps,

Carsten.




From duncan.booth at invalid.invalid  Thu Mar 22 09:23:08 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Mar 2007 13:23:08 GMT
Subject: Python 3000 idea: reversing the order of chained assignments
References: <Xns98FB5C293918duncanbooth@127.0.0.1>
	<mailman.5447.1174557417.32031.python-list@python.org>
Message-ID: <Xns98FB882944CB5duncanbooth@127.0.0.1>

Steve Holden <steve at holdenweb.com> wrote:

>> As a matter of interest do PyLint or PyChecker check for this situation 
>> (chained assignment where the target of an assignment is also a 
>> subexpression of a later assignment)?
>> 
> Where's the published syntax for chained assignment?

http://docs.python.org/ref/assignment.html

More specifically, since you seem to have missed it, it's the '+' in the 
line:

assignment_stmt  	::=  	(target_list "=")+ expression_list

And then the clear statement "assigns the single resulting object to each 
of the target lists, from left to right".


From deets at nospam.web.de  Mon Mar  5 08:44:05 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 05 Mar 2007 14:44:05 +0100
Subject: CherryPy + Database questions
References: <mailman.4673.1173101612.32031.python-list@python.org>
Message-ID: <552l55F22aph6U1@mid.uni-berlin.de>

Brian Blais wrote:

> Hello,
> 
> I have more of a conceptual question about the way databases work, in a
> web
> framework, but I will be implementing things with CherryPy and SQLAlchemy.
>  If you make a web form that adds rows to a database, and use sqlite as
> the engine, is there a danger of a race condition if several users at the
> same time try to submit the
> form?  I want a unique row id, and make a unique identifier for the
> submissions.  Am I in danger of having multiple submissions given the same
> identifier?
> 
> I know that if I implemented things without a database, but used a flat
> file or something like it, I would have that possibility, when two
> processes try to read and update the file at the same time.
> 
> If you want something more specific, I can throw some code together, but I
> wanted to get an answer before that because it will change the way I
> develop the code.

Usually, that is exactly what a RDBMS gives you. See the database connector
module's threadsaftey property to see what exactly you can expect.

Diez


From spam at chezmarshall.freeserve.co.uk  Fri Mar  9 06:50:41 2007
From: spam at chezmarshall.freeserve.co.uk (Robert Marshall)
Date: Fri, 09 Mar 2007 11:50:41 GMT
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
	<45f138ee$0$23918$426a74cc@news.free.fr>
Message-ID: <m11wjyy7p5.fsf@chezmarshall.freeserve.co.uk>

On Fri, 09 Mar 2007, Bruno Desthuilliers wrote:

> 
> Nick Craig-Wood a ?crit :
>> dbhbarton at googlemail.com <dbhbarton at googlemail.com> wrote:
>>>  What if 2 new 'special' comment-like characters were added to
>>>  Python?:
>>>
>>>
>>>  1. The WIP (Work In Progress) comment:
>>
>> I use # FIXME for this purpose or /* FIXME */ in C etc.
>>
>> I have an emacs macro which shows it up in bright red / yellow text
>> so it is easy to see
> 
> <ot>
> Care to share this macro ?
> </ot>

I have this

(cond (window-system
   (progn
     (font-lock-add-keywords 
        'python-mode '(("\\<FIXME: .*$" 0 font-lock-warning-face prepend))))))

Robert
-- 
La grenouille songe..dans son ch?teau d'eau
Links and things http://rmstar.blogspot.com/


From lav_as at hotmail.com  Tue Mar 20 08:21:51 2007
From: lav_as at hotmail.com (Admir Saric)
Date: Tue, 20 Mar 2007 13:21:51 +0100
Subject: How to send
Message-ID: <BAY115-F112FCC02F66B6A88D21BA0F9750@phx.gbl>

Hi,

i have created an application in pygtk. The application creates files with 
its own file type and extensions and saves them. I would like to extend the 
application to be able to send these files over WLAN. I would use the 
application in my Nokia 770 Internet tablet and send the files from one 
tablet to the other. Does anybody know how to make python application send 
files over the WLAN.

Best regards
Admir

_________________________________________________________________
Schlagerfeber p? MSN! http://festival.msn.se/



From gagsl-py2 at yahoo.com.ar  Wed Mar 14 19:26:14 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 Mar 2007 20:26:14 -0300
Subject: Attribute monitoring in a class
References: <mailman.5071.1173868190.32031.python-list@python.org>
	<45f7d65b$0$23624$426a74cc@news.free.fr>
	<45F7F242.9070002@gmail.com>
Message-ID: <op.to7cp0jhx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 10:01:54 -0300, Joel Andres Granados  
<joel.granados at gmail.com> escribi?:

> Bruno Desthuilliers wrote:
>> Joel Andres Granados a ?crit :

>>> I'm
>>> working with code that is not of my authorship and there is a class
>>> attribute that is changes by directly referencing it (object.attr =
>>> value) instead of using a getter/setter (object.setAttr(Value) )

>> yes : object.__setattr__(self, name, value)
> I used this ^^^^^^^^^^^^^^^ one.  Thank for the help.

The problem with __setattr__ is that it slows down significantly *all*  
attributes.
Yours is the typical case when it's good to switch from using simple  
attributes to using properties. See
<http://dirtsimple.org/2004/12/python-is-not-java.html>

-- 
Gabriel Genellina



From AWasilenko at gmail.com  Thu Mar 22 21:28:11 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 22 Mar 2007 18:28:11 -0700
Subject: TypeError: 'int' object is not callable
In-Reply-To: <1174611587.000306.210790@b75g2000hsg.googlegroups.com>
References: <1174611244.465956.104060@n76g2000hsh.googlegroups.com>
	<1174611587.000306.210790@b75g2000hsg.googlegroups.com>
Message-ID: <1174613291.027531.244670@y66g2000hsf.googlegroups.com>

On Mar 22, 8:59 pm, "Dan Bishop" <danb... at yahoo.com> wrote:
> On Mar 22, 6:54 pm, AWasile... at gmail.com wrote:
>
>
>
>
>
> > I'm trying to test a few different approaches to displaying pages via
> > Cherrypy and I'm not having much luck.  Here is my code so far:
>
> > import sys, cherrypy, html
>
> > class Root:
> >         @cherrypy.expose
> >         def index(self, pageid = None):
> >                 selection = html.Page()
> >                 return  selection.input()
>
> > cherrypy.config.update({'server.socket_port': 2572, 'log.screen':
> > False})
> > cherrypy.quickstart(Root())
>
> > and here is the html.py file that I import:
>
> > class Page:
> >         def input(self,dex=None):
> >                 if dex == None:
> >                         return 404(dex)
> >                 else:
> >                         return "Something else?"
>
> >         def err404(self,whatitis="N/A"):
> >                 return """<body bgcolor="#666666">
> > <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
>
> > <center>Sorry the page: """ + str(whatitis) + """ does not exist.<br /
>
> > <img src="/files/images/404.png" alt="Page cannot be found."></center>
> > </body>"""
>
> > and here is the error I get when trying to run this:
>
> > 500 Internal Server Error
> > The server encountered an unexpected condition which prevented it from
> > fulfilling the request.
>
> > Traceback (most recent call last):
> >   File "/home2/awasilenko/lib/python2.4/cherrypy/_cprequest.py", line
> > 342, in respond
> >     cherrypy.response.body = self.handler()
> >   File "/home2/awasilenko/lib/python2.4/cherrypy/_cpdispatch.py", line
> > 15, in __call__
> >     return self.callable(*self.args, **self.kwargs)
> >   File "/home2/awasilenko/webapps/cp/site.py", line 7, in index
> >     return  selection.input()
> >   File "/home2/awasilenko/webapps/cp/html.py", line 4, in input
> >     return 404(dex)
> > TypeError: 'int' object is not callable
>
> > I know this isn't a Cherrypy issue since I have made other pages work,
> > I'm just making a dumb mistake somewhere.  My plan is to eventually be
> > able to pass dex to the input def in the page class so it can display
> > the right page.  Right now I am just trying to make ANY thing show up,
> > what should happen is since I'm not passing anything everything should
> > be None and the 404 page should pop up.  I would also like to make the
> > 404 page print the page that was requested, I have already coded the
> > return but have not "connected" it yet, one step at a time...
>
> 404 is an integer literal; you can't use it as a function name.- Hide quoted text -
>
> - Show quoted text -

I saw that 404 was turning colors in my editor when I used it, that's
why I changed the def name, I just forgot to change it in the input
def also.  Here is the working code now:

class Page:
	def input(self,dex=None):
		if dex == None:
			return self.err404(dex)
		else:
			return "Something else?"

	def err404(self,whatitis="N/A"):
		return """<body bgcolor="#666666">
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /
><br /><br />
<center>Sorry the page: """ + str(whatitis) + """ does not exist.<br /
>
<img src="/files/images/404.png" alt="Page cannot be found."></center>
</body>"""

Now I can work on getting the other stuff working.  I can't believe
something that stupid was holding me up, oh well :)



From aahz at pythoncraft.com  Thu Mar  8 11:31:14 2007
From: aahz at pythoncraft.com (Aahz)
Date: 8 Mar 2007 08:31:14 -0800
Subject: worker thread catching exceptions and putting them in queue
References: <45ec4936$0$323$e4fe514c@news.xs4all.nl>
Message-ID: <espdoi$t2l$1@panix3.panix.com>

In article <45ec4936$0$323$e4fe514c at news.xs4all.nl>,
Paul Sijben  <paul.sijben at xs4all.nl> wrote:
>
>in a worker thread setup that communicates via queues is it possible to
>catch exceptions raised by the worker executed, put them in an object
>and send them over the queue to another thread where the exception is
>raised in that scope?
>
>considering that an exception is an object I feel it ought to be
>possible, however I do not see how to go about it.

One caution: because exceptions keep stack frames alive, you can have
garbage collection problems.  Make sure to del the exception when you're
done with it.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From n.emami at gmail.com  Thu Mar  1 09:16:35 2007
From: n.emami at gmail.com (Nader)
Date: 1 Mar 2007 06:16:35 -0800
Subject: installing "pysqlite"
In-Reply-To: <1172756443.839448.327280@h3g2000cwc.googlegroups.com>
References: <9258d$45e3fa5d$9117fe9b$16503@news2.tudelft.nl>
	<1172576685.560386.306740@m58g2000cwm.googlegroups.com>
	<639dd$45e5625a$9117fe9b$1180@news1.tudelft.nl>
	<1172663495.011225.76410@v33g2000cwv.googlegroups.com>
	<1172741654.589821.255220@v33g2000cwv.googlegroups.com>
	<1172745997.863121.96940@8g2000cwh.googlegroups.com>
	<1172749563.834987.197840@z35g2000cwz.googlegroups.com>
	<1172756443.839448.327280@h3g2000cwc.googlegroups.com>
Message-ID: <1172758595.499977.287130@8g2000cwh.googlegroups.com>

On Mar 1, 2:40 pm, "Paul Boddie" <p... at boddie.org.uk> wrote:
> On 1 Mar, 12:46, "Nader" <n.em... at gmail.com> wrote:
>
>
>
> > ldd returens the next result:
> > ldd /usr/people/emami/lib/python2.4/site-packages/pysqlite2/_sqlite.so
> >     linux-gate.so.1 =>  (0xffffe000)
> >     libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40040000)
> >     libc.so.6 => /lib/tls/libc.so.6 (0x40050000)
>
> I think you pasted the nm result in here, but you seem to be missing
> libsqlite3.so.0 (from what I see myself). From what I've just read
> about linux-gate.so, the linker can't seem to find the SQLite
> libraries. More on linux-gate.so here:
>
> http://www.trilithium.com/johan/2005/08/linux-gate/
>
> > and the 'nm' gives this:
>
> > nm usr/people/emami/lib/libsqlite3.so | grep  sqlite3_set_authorize
> > 0000ce40 T sqlite3_set_authorizer
>
> That looks alright.
>
> >         /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)
>
> I guess this was the end of the ldd result.
>
> I'm out of ideas, unfortunately. I think you should experiment with
> LD_LIBRARY_PATH and run ldd again to see if you can get it to show
> libsqlite3.so.0. The pysqlite mailing list might be the best place to
> ask for help if that doesn't work. Sorry!
>
> Paul

Hello Paul,

I have returnd to the begining and have installed everthing again.
Fortunately now I have the 'pysqlite2' module, because the test.test()
workd after importing of 'pysqlite2'

 >>> from pysqlite2 import test
>>> test.test
<function test at 0x404727d4>
>>> test.test()
.............................................................................................................................................................................
----------------------------------------------------------------------
Ran 173 tests in 0.585s

OK
>>>

And the result of running of 'ldd' is :
emami at bcw009:~> ldd lib/python2.4/site-packages/pysqlite2/_sqlite.so
        linux-gate.so.1 =>  (0xffffe000)
        libsqlite3.so.0 => /usr/people/emami/lib/libsqlite3.so.0
(0x40010000)
        libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40096000)
        libc.so.6 => /lib/tls/libc.so.6 (0x400a7000)

Now I can ggo on with TurboGears! I have at home a Laptop and I have
installed the 'gentoo' on it, and have no problem. But I would like to
experiment with TurboGears at my work and It was a problem that I had
no 'root' password.
However I appreciate well your help in this case. I you like Indian or
oriental music I can send you some!

With regards,

Nader



From mail at microcorp.co.za  Thu Mar 29 01:22:58 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Thu, 29 Mar 2007 07:22:58 +0200
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com><56prsrF2am4a1U1@mid.uni-berlin.de><mailman.5660.1174978878.32031.python-list@python.org><slrnf0hjhg.php.nick@irishsea.home.craig-wood.com><mailman.5697.1175060331.32031.python-list@python.org>
	<slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>
Message-ID: <000d01c771d2$2e8e5860$03000080@hendrik>

 "Nick Craig-Wood" <nick at crai....od.com> wrote:

> Well, yes there are different levels of potential reliability with
> different implementation strategies for each!

Gadzooks!  Foiled again by the horses for courses argument.

; - )

- Hendrik



From paltman at gmail.com  Mon Mar 12 23:07:55 2007
From: paltman at gmail.com (Patrick Altman)
Date: 12 Mar 2007 20:07:55 -0700
Subject: httplib/socket problems reading 404 Not Found response
Message-ID: <1173755273.697153.97270@64g2000cwx.googlegroups.com>

I am attempting to use a HEAD request against Amazon S3 to check
whether a file exists or not and if it does parse the md5 hash from
the ETag in the response to verify the contents of the file so as to
save on bandwidth of uploading files when it is not necessary.

If the file exist, the HEAD works as expected and I get valid headers
back that I can parse and pull the ETag out of the dictionary using
getheader('ETag')[1:-1] (using the slice to trim off the double-quotes
in the string.

The problem lies when I attempt to send a HEAD request when no file
exists.   As expected, a 404 Not Found response is sent back from
Amazon however, my test scripts seem to hang.  I run python with
trace.py and it hangs here:

 --- modulename: httplib, funcname: _read_chunked
httplib.py(536):         assert self.chunked != _UNKNOWN
httplib.py(537):         chunk_left = self.chunk_left
httplib.py(538):         value = ''
httplib.py(542):         while True:
httplib.py(543):             if chunk_left is None:
httplib.py(544):                 line = self.fp.readline()
 --- modulename: socket, funcname: readline
socket.py(321):         data = self._rbuf
socket.py(322):         if size < 0:
socket.py(324):             if self._rbufsize <= 1:
socket.py(326):                 assert data == ""
socket.py(327):                 buffers = []
socket.py(328):                 recv = self._sock.recv
socket.py(329):                 while data != "\n":
socket.py(330):                     data = recv(1)

It eventually completes with an exception here:

  File "C:\Python25\lib\httplib.py", line 509, in read
    return self._read_chunked(amt)
  File "C:\Python25\lib\httplib.py", line 548, in _read_chunked
    chunk_left = int(line, 16)
ValueError: invalid literal for int() with base 16: ''

For reference, ethereal captured the following request and response:

HEAD <REMOVED> HTTP/1.1
Host: s3.amazonaws.com
Accept-Encoding: identity
Date: Tue, 13 Mar 2007 02:54:12 GMT
Authorization: AWS <REMOVED>

HTTP/1.1 404 Not Found
x-amz-request-id: E20B4C0D0C48B2EF
x-amz-id-2: <REMOVED>
Content-Type: application/xml
Transfer-Encoding: chunked
Date: Tue, 13 Mar 2007 02:54:16 GMT
Server: AmazonS3

Am I doing something wrong?  Is this a known issue?  I am an
experienced developer, but pretty new to Python and dynamic languages
in general.

Thanks,
Patrick



From nobody at invalid.com  Mon Mar 26 11:57:20 2007
From: nobody at invalid.com (Erik Johnson)
Date: Mon, 26 Mar 2007 09:57:20 -0600
Subject: calling class instances and their methods
References: <1174921229.208577.8290@e65g2000hsc.googlegroups.com>
Message-ID: <4607ed52$1@nntp.zianet.com>

"spohle" <spohle at gmail.com> wrote in message
news:1174921229.208577.8290 at e65g2000hsc.googlegroups.com...
> hi,
>
> i created an instance of a my own class which has methods and all. now
> i get an outside function called, which is unfortunatly not aware of
> the instace at all (i don't control how this outside function is
> called). but i would like to get access back to my instance and it's
> methods.
>
> is there any clean way of doing this ?
>
> thanks in advance


Ummm...  I'm not exactly sure what you mean by "an outside function", but
let's refer to that function as f(). Are you saying you want to re-implement
f() to use your new object but don't want to (or can't) change calls to f()?

    If so, then you can either use a global reference to your new object if
it is the sort of thing you want to keep around between invocations of f()
(i.e., create your object somewhere and then save in a scope that f() can
access). Otherwise, you can simply instantiate your object inside of f() as
a local variable and use it.

    If you mean something else, I guess you will have to clarify.




From bj_666 at gmx.net  Sat Mar 10 04:12:06 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sat, 10 Mar 2007 10:12:06 +0100
Subject: UTF-8 output problems
References: <mailman.4882.1173489493.32031.python-list@python.org>
Message-ID: <pan.2007.03.10.09.12.05.48880@gmx.net>

In <mailman.4882.1173489493.32031.python-list at python.org>, Michael B.
Trausch wrote:

> However, when I attempt to redirect the output to a file:
> 
> mbt at pepper:~/tmp$ python test.py >f
> Traceback (most recent call last):
>   File "test.py", line 6, in <module>
>     print u"This is Unicode code point %d (0x%x): %s" % (x, x,
> unichr(x))
> UnicodeEncodeError: 'ascii' codec can't encode character u'\x80' in
> position 39: ordinal not in range(128)
> 
> This is slightly confusing to me.  The output goes all the way to the
> end of the program when it is not redirected.  Why is Python treating
> the situation differently when the output is redirected?

If you print to a terminal `sys.stdout` is connected to that terminal and
there are ways to figure out that it is a terminal (`os.isatty()`) and
which encoding the terminal excepts.  At least in most cases.  But there
is no way to tell what encoding a file or pipe should have.  So Python
refuses to guess.

If an encoding could be determined the `sys.stdout.encoding` attribute is
set to the name, otherwise it's `None`.

Ciao,
	Marc 'BlackJack' Rintsch


From pete at shinners.org  Thu Mar  1 12:57:46 2007
From: pete at shinners.org (shredwheat)
Date: 1 Mar 2007 09:57:46 -0800
Subject: BeautifulSoup modified to use weak refs and avoid circular links.
In-Reply-To: <mailman.4385.1172444719.32031.python-list@python.org>
References: <mailman.4385.1172444719.32031.python-list@python.org>
Message-ID: <1172771866.600972.76530@h3g2000cwc.googlegroups.com>

The timeit code disables the garbage collector while running. I ran
the tests on my system after adding the following lines to t1() and
t2().
    del base
    gc.collect()


    Original timetest.py:
Using proxy
100 loops, best of 3: 4.45 msec per loop
Call to dummy proxy
100 loops, best of 3: 2.24 msec per loop
Without proxy call
100 loops, best of 3: 3.01 msec per loop

    With garbage collection:
Using proxy
100 loops, best of 3: 5.17 msec per loop
Call to dummy proxy
100 loops, best of 3: 4.27 msec per loop
Without proxy call
100 loops, best of 3: 3.99 msec per loop


The overhead of weakref still doesn't outweigh the overhead of cyclic
garbage collection, but they narrow the gap.

I also saw a bit of noise while running this benchmark. Different runs
were giving me varying times. Large enough to see about 20%
discrepencies.



From lojicdotcomNOSPAM at gmail.com  Thu Mar  8 00:58:39 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Thu, 08 Mar 2007 00:58:39 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <7xhcsws35x.fsf@ruckus.brouhaha.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
Message-ID: <iCNHh.4262$B7.975@bigfe9>

Paul Rubin wrote:
> Brian Adkins <lojicdotcomNOSPAM at gmail.com> writes:
>> With prices of dedicated servers and virtual private servers so cheap,
>> why would anyone get a hosting account without root access? 
> 
> Because it turns you into a sysadmin instead of letting specialists
> handle all the OS stuff so you can concentrate on your application.

I'm not sure what "OS stuff" you're referring to, but my interactions 
with my dedicated host are quite similar to when I had a shared hosting 
account (except I never have to contact the hosting company like I used 
to with a shared account - it just keeps humming along).

Besides, this whole thing got started with John resurrecting the 
"industrial strength" argument. I hardly think a shared hosting account 
would be considered "industrial strength". If you're not willing to deal 
with a dedicated server, then I don't think you're serious about 
"industrial strength", right? Not to mention the fact that none of this 
has anything to do with the "industrial strengthness" of the language.

> 
> Also, no VPS where you have to run your own httpd instance (and
> usually your own database if you're using one) can possibly be as
> cheap as a virtual host where you're sharing the same httpd with
> thousands of other sites.

And you *want* to share the same httpd with thousands of other sites?

I can relate to what you're saying. I tried the shared hosting thing 
originally, but the saying, "you get what you pay for" holds some truth 
here.

Maybe y'all should change the thread to "Why don't shared hosting 
companies treat Python customers better?" or something along those 
lines. We seem to have drifted from "Princess Bride" quotes and the 
merits of Lisp vs. Python ;)


From paul.rudin at ntlworld.com  Fri Mar 23 15:05:49 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Fri, 23 Mar 2007 19:05:49 +0000
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
Message-ID: <87ejnfzsoi.fsf@rudin.co.uk>

Paulo da Silva <psdasilvaX at esotericaX.ptX> writes:

> Hi!
>
> I was told in this NG that string is obsolet. I should use
> str methods.
>
> So, how do I join a list of strings delimited by a given
> char, let's say ','?
>
> Old way:
>
> l=['a','b','c']
> jl=string.join(l,',')
>
> New way?

Dunno if it's the "new way", but you can do: ''.join(l)



From jgodoy at gmail.com  Sun Mar 11 22:12:04 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 11 Mar 2007 23:12:04 -0300
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<7xps7f5ptp.fsf@ruckus.brouhaha.com>
	<1hutrb3.e1sbu5kvxk8nN%aleax@mac.com>
Message-ID: <87odmznrbf.fsf@gmail.com>

aleax at mac.com (Alex Martelli) writes:

> Incidentally (and I know you know that, Paul, but others interested in
> this thread might not) fast exact rational arithmetic (based on the LGPL
> library named GMP) is supplied, among other functionality, by module
> gmpy, currently found at http://code.google.com/p/gmpy/ (this version is
> more recent than the older one at sourceforce, which for some reason
> doesn't let me update things right any more).

For some reason setuptools isn't finding it:

jupiter:~ # easy_install gmpy
Searching for gmpy
Reading http://cheeseshop.python.org/pypi/gmpy/
Reading http://code.google.com/p/gmpy/
Reading http://cheeseshop.python.org/pypi/gmpy/1.02
No local packages or download links found for gmpy
error: Could not find suitable distribution for Requirement.parse('gmpy')


I believe that setuptools isn't ready to find packages on code.google.com
yet... ;-)

-- 
Jorge Godoy      <jgodoy at gmail.com>


From rehceb at no.spam.plz  Sat Mar 31 14:19:52 2007
From: rehceb at no.spam.plz (Rehceb Rotkiv)
Date: Sat, 31 Mar 2007 13:19:52 -0500
Subject: Sorting a multidimensional array by multiple keys
References: <pan.2007.03.31.12.43.14@no.spam.plz>
Message-ID: <pan.2007.03.31.18.20.00@no.spam.plz>

Thank you all for your helpful solutions!

Regards,
Rehceb


From gherron at islandtraining.com  Tue Mar 20 12:25:17 2007
From: gherron at islandtraining.com (Gary Herron)
Date: Tue, 20 Mar 2007 09:25:17 -0700
Subject: making objects with individual attributes!
In-Reply-To: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>
References: <1174406902.445936.261450@y66g2000hsf.googlegroups.com>
Message-ID: <46000AED.1090006@islandtraining.com>

Alejandro wrote:
> I have created a class:
>
> class document:
>
>     titre = ''
>     haveWords = set()
>
>     def __init__(self, string):
>
>         self.titre = string
>
> #########
>
> doc1 = document('doc1')
> doc2 = document('doc2')
>
> doc1.haveWords.add(1)
> doc2.haveWords.add(2)
>
>
> print doc1.haveWords
>
> # i get set([1, 2])
>
>
> doc1 and doc are sharing attribute haveWords!
> Why ??? there's a way to assign every objetc "document" a different
> "set"
>   
Of course.  Try this:

class document:
    def __init__(self, string):
        self.titre = string
        self.haveWords = set()

Each instance creation will call __init__ with the instance 
accessible through self, and that code will create two instance
specific attributes.

Don't use so called class level attributes (as in your example) 
unless you  *want* sharing between all instances of a class.

Gary Herron






From sunil_25aug at yahoo.co.in  Mon Mar  5 16:58:27 2007
From: sunil_25aug at yahoo.co.in (BITTU ROY)
Date: Mon, 5 Mar 2007 21:58:27 +0000 (GMT)
Subject: XXX Fucking Pics
Message-ID: <408331.95022.qm@web7804.mail.in.yahoo.com>

  
 				
---------------------------------
 Here?s a new way to find what you're looking for - Yahoo! Answers 
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From aboudouvas at panafonet.gr  Mon Mar 19 08:08:29 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 19 Mar 2007 05:08:29 -0700
Subject: PythonCard thoughts
Message-ID: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>

Hi to all folks here,

i downloaded and "playing" with PythonCard and i just want to share my
thoughts so maybe we can discuss a little about it.
I was used to wxGlade before and i think PythonCard is even better.
I like the separate implementation of GUI and Code that PythonCard
provides, i also like the "binding system" so you can bind functions
to events and have them executed at runtime.
I also like that it does not force you to use sizers and all that
stuff and that you can freely place your components on the form and
set their exact position just with the mouse.

The only "problem" i see with this design is that by that separation
of Gui/Code, you loose the intellisense that (ex. PyDev) some editors/
plugins can provide because in the .py file nothing is indicating
that , for example, the btnDoWork is a Button object.
This force you to remember many properties and switch back and forth
between your code and the wxPython help file. This is not the case for
wxGlade because all boilerplate code is in the same file (for good and
for bad) and PyDev (and others too) can "understand" for which kind of
objects we are talking about and so can display -and thus help us-
with their properties.

Apart from that, everything else is great.

Any opinions/suggestion on all this ?



From yinglcs at gmail.com  Sat Mar 17 20:28:56 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 17 Mar 2007 17:28:56 -0700
Subject: How to parse the os.system() output in python
Message-ID: <1174177736.241481.115150@d57g2000hsg.googlegroups.com>

Hi,

I use os.system() to execute a system command in python.
Can you please tell me how can I parse (in python) the output of the
os.system()  ?

Thank you.



From jstroud at mbi.ucla.edu  Thu Mar  1 05:33:07 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 01 Mar 2007 10:33:07 GMT
Subject: splitting perl-style find/replace regexp using python
In-Reply-To: <es69ki$928$03$1@news.t-online.com>
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
	<ODxFh.3179$BE2.2738@newssvr27.news.prodigy.net>
	<1LxFh.3180$BE2.57@newssvr27.news.prodigy.net>
	<es69ki$928$03$1@news.t-online.com>
Message-ID: <DZxFh.3182$BE2.1402@newssvr27.news.prodigy.net>

Peter Otten wrote:
> James Stroud wrote:
> 
>> James Stroud wrote:
>>> John Pye wrote:
>>>> Hi all
>>>>
>>>> I have a file with a bunch of perl regular expressions like so:
>>>>
>>>> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
>>>> bold
>>>> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
>>>> b>''$3/ # italic bold
>>>> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
>>>> italic
>>>>
>>>> These are all find/replace expressions delimited as '/search/replace/
>>>> # comment' where 'search' is the regular expression we're searching
>>>> for and 'replace' is the replacement expression.
>>>>
>>>> Is there an easy and general way that I can split these perl-style
>>>> find-and-replace expressions into something I can use with Python, eg
>>>> re.sub('search','replace',str) ?
>>>>
>>>> I though generally it would be good enough to split on '/' but as you
>>>> see the <\/b> messes that up. I really don't want to learn perl
>>>> here :-)
>>>>
>>>> Cheers
>>>> JP
>>>>
>>> This could be more general, in principal a perl regex could end with a
>>> "\", e.g. "\\/", but I'm guessing that won't happen here.
>>>
>>> py> for p in perlish:
>>> ...   print p
>>> ...
>>> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/
>>> /(^|[\s\(])\_\_([^ ].*?[^
>>> ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/b>''$3/ /(^|[\s\(])\_([^ ].*?[^
>>> ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ py> import re
>>> py> splitter = re.compile(r'[^\\]/')
>>> py> for p in perlish:
>>> ...   print splitter.split(p)
>>> ...
>>> ['/(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
>>> "$1'''$2'''$", '']
>>> ['/(^|[\\s\\(])\\_\\_([^ ].*?[^ ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
>>> "$1''<b>$2<\\/b>''$", '']
>>> ['/(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
>>> "$1''$2''$", '']
>>>
>>> (I'm hoping this doesn't wrap!)
>>>
>>> James
>> I realized that threw away the closing parentheses. This is the correct
>> version:
>>
>> py> splitter = re.compile(r'(?<!\\)/')
>> py> for p in perlish:
>> ...   print splitter.split(p)
>> ...
>> ['', '(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$)',
>> "$1'''$2'''$3", '']
>> ['', '(^|[\\s\\(])\\_\\_([^ ].*?[^
>> ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$)', "$1''<b>$2<\\/b>''$3", '']
>> ['', '(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$)',
>> "$1''$2''$3", '']
> 
> There is another problem with escaped backslashes:
> 
>>>> re.compile(r'(?<!\\)/').split(r"/abc\\/def/")
> ['', 'abc\\\\/def', '']
> 
> Peter

Yes, this would be a case of the expression (left side) ending with a 
"\" as I mentioned above.

James


From thinker at branda.to  Wed Mar 21 09:37:12 2007
From: thinker at branda.to (Thinker)
Date: Wed, 21 Mar 2007 21:37:12 +0800
Subject: Garbage collection
In-Reply-To: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
Message-ID: <46013508.4010407@branda.to>

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Tom Wright wrote:
> Hi all
>
> I suspect I may be missing something vital here, but Python's garbage
> collection doesn't seem to work as I expect it to. Here's a small test
> program which shows the problem on python 2.4 and 2.5:
............... skip .....................
> (at this point, Python is using 252MB)
>
>
> Is there something I've forgotten to do? Why is Python still using such a
> lot of memory?
>
>
> Thanks!
>
How do you know amount of memory used by Python?
ps ? top or something?

- --
Thinker Li - thinker at branda.to thinker.li at gmail.com
http://heaven.branda.to/~thinker/GinGin_CGI.py
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Mar  9 05:38:22 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 09 Mar 2007 11:38:22 +0100
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<slrnev2cl1.vc0.nick@irishsea.home.craig-wood.com>
Message-ID: <45f138ee$0$23918$426a74cc@news.free.fr>

Nick Craig-Wood a ?crit :
> dbhbarton at googlemail.com <dbhbarton at googlemail.com> wrote:
>>  What if 2 new 'special' comment-like characters were added to Python?:
>>
>>
>>  1. The WIP (Work In Progress) comment:
> 
> I use # FIXME for this purpose or /* FIXME */ in C etc.
> 
> I have an emacs macro which shows it up in bright red / yellow text so
> it is easy to see

<ot>
Care to share this macro ?
</ot>


From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 13:25:00 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 21 Mar 2007 04:25:00 +1100
Subject: Exceptions when closing a file
Message-ID: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>

Closing a file can (I believe) raise an exception. Is that documented
anywhere? I've spent a lot of frustrating time trying to track this down,
with no luck, which suggests that either my google-foo is weak or that it
isn't documented. Is IOError the only exception it can raise?

The only thing I have found is this:

http://mail.python.org/pipermail/python-bugs-list/2004-November/026031.html

Out of curiosity, is there a simple way to demonstrate close() raising an
exception that doesn't involve messing about with disk quotas? 


-- 
Steven.



From C.delete_this.Sanders at BoM.GOv.AU  Wed Mar 21 03:22:52 2007
From: C.delete_this.Sanders at BoM.GOv.AU (Charles Sanders)
Date: Wed, 21 Mar 2007 18:22:52 +1100
Subject: How to tell  easy_install that a package is already installed
Message-ID: <4600dd4d$0$98624$c30e37c6@lon-reader.news.telstra.net>

I  am not sure if this is the right forum to ask this. If it is not,
could someone pleas point me to a more appropriate newsgroup.

I am attempting to install dap.plugins.netcdf using easy_install
on HP-UX 11. As a user, I do not have access to root so have
followed the easy_install recommendation to set up a "virtual"
python, as described at

http://peak.telecommunity.com/DevCenter/EasyInstall#creating-a-virtual-python

and this is mostly working well. One of the dependencies, numpy
is already installed, but easy_install does not detect this, and
tries to install numpy, which fails with many compilation errors.
(numerous pointer type mismatches, undeclared functions like
rintf that do not exist on HP, ...) I could try to install numpy
myself from the tar.gz file, but this seems pointless since it is
already installed.

Is there any way to tell easy_install that numpy is installed, while
still installing any other dependencies ?

Would the best option be to just use the --no-deps option and see if
it works ?


Charles


From sgeiger at ncee.net  Fri Mar 23 17:17:43 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Fri, 23 Mar 2007 16:17:43 -0500
Subject: Create new processes over telnet in XP
In-Reply-To: <46043ad8$0$27402$ba4acef3@news.orange.fr>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>
	<46043ad8$0$27402$ba4acef3@news.orange.fr>
Message-ID: <460443F7.9000406@ncee.net>

This reminds me of something I once wanted to do:  How can I install 
Python in a totally non-gui way on Windows (without the use of VNC)?  I 
think I was telnetted into a computer (or something like that) and I was 
unable to run the usual Python installer because it uses a GUI.





Laurent Pointal wrote:
> Jorgen Grahn wrote:
>
>   
>> On 23 Mar 2007 03:47:14 -0700, Godzilla <godzillaismad at gmail.com> wrote:
>>     
>>> Hello,
>>>
>>> How do you create/spawn new processes in XP over telnet using python?
>>> I.e. I would like to create a new process and have it running in the
>>> background...
>>>       
>> Ssh -- or even rsh -- are better choices than telnet for these things.
>> For some reason, they are not standard in Windows, though.
>>
>>   ssh somewhere some command with arguments
>>   rsh somewhere some command with arguments
>>
>> compared to
>>
>>   telnet somewhere
>>
>> and then performing expect-like things (basically simulating
>> someone typing "some command with arguments" in the telnet
>> session).
>>     
>
> + for an sshd running as a service under XP, look at CopSSH.
>
> + hope started process doesn't want a GUI... else, look at UltraVNC running
> as daemon, and port redirection using ssh.
>
>   
>>> when I terminate the telnet connection, I would what the
>>> spawned processes to keep running until I shut it off...
>>>       
>> That's a function of the remote OS; what happens when its terminal
>> goes away is not under the control of the client side.
>>     
>
> Maybe the process starting job can be done by a Python program running as
> Windows service and waiting for requests on a port (or Pyro object or Corba
> object...). 
> No need for telnet/ssh connection, no logout problem.
>
> Just care of possible security problems :-) 
>
>
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From laurent.pointal at limsi.fr  Wed Mar 14 11:44:22 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 14 Mar 2007 16:44:22 +0100
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
Message-ID: <et958a$o9c$1@news2.u-psud.fr>

Drew a ?crit :
> When is it appropriate to use dict.items() vs dict.iteritems. Both
> seem to work for something like:
> 
> for key,val in mydict.items():
>   print key,val
> 
> for key,val in mydict.iteritems():
>   print key,val
> 
> Also, when is it appropriate to use range() vs xrange(). From my
> understanding, xrange() essentially gives you an iterator across a
> range, so it should be used when iterating. Should you only use
> range() when want to physically store the range as a list?

iteritems and xrange only provide values when requested.
items and range build complete list when called.

Both work, you may prefer xrange/iteritems for iteration on large
collections, you may prefer range/items when processing of the result
value explicitly need a list (ex. calculate its length) or when you are
going to manipulate the original container in the loop.

A+

Laurent.


From nisimura at gmail.com  Thu Mar 15 20:33:29 2007
From: nisimura at gmail.com (nisimura at gmail.com)
Date: 15 Mar 2007 17:33:29 -0700
Subject: Python Eggs on Cygwin
Message-ID: <1174005208.972118.104860@l77g2000hsb.googlegroups.com>

Hi,

I'm trying to use MySQL Python module on Cygwin.  Since there is no
binary package, I compiled MySQL C client library and Python module
(http://sourceforge.net/projects/mysql-python) manually.

But when I was trying to load MySQLdb module, following errors
happened.

>>> import MySQLdb
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "build/bdist.cygwin-1.5.22-i686/egg/MySQLdb/__init__.py", line
19, in ?
  File "build/bdist.cygwin-1.5.22-i686/egg/_mysql.py", line 7, in ?
  File "build/bdist.cygwin-1.5.22-i686/egg/_mysql.py", line 6, in
__bootstrap__
ImportError: Permission denied

This seems to be Eggs/Cygwin problem.  Is there any solution?

Regards,

--
Kazu Nisimura



From matthew.garman at gmail.com  Fri Mar 23 17:11:35 2007
From: matthew.garman at gmail.com (Matt Garman)
Date: Fri, 23 Mar 2007 15:11:35 -0600
Subject: Python object overhead?
Message-ID: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>

I'm trying to use Python to work with large pipe ('|') delimited data
files.  The files range in size from 25 MB to 200 MB.

Since each line corresponds to a record, what I'm trying to do is
create an object from each record.  However, it seems that doing this
causes the memory overhead to go up two or three times.

See the two examples below: running each on the same input file
results in 3x the memory usage for Example 2.  (Memory usage is
checked using top.)

This happens for both Python 2.4.3 on Gentoo Linux (64bit) and Python
2.3.4 on CentOS 4.4 (64bit).

Is this "just the way it is" or am I overlooking something obvious?

Thanks,
Matt


Example 1: read lines into list:
# begin readlines.py
import sys, time
filedata = list()
file = open(sys.argv[1])
while True:
    line = file.readline()
    if len(line) == 0: break # EOF
    filedata.append(line)
file.close()
print "data read; sleeping 20 seconds..."
time.sleep(20) # gives time to check top
# end readlines.py


Example 2: read lines into objects:
# begin readobjects.py
import sys, time
class FileRecord:
    def __init__(self, line):
        self.line = line
records = list()
file = open(sys.argv[1])
while True:
    line = file.readline()
    if len(line) == 0: break # EOF
    rec = FileRecord(line)
    records.append(rec)
file.close()
print "data read; sleeping 20 seconds..."
time.sleep(20) # gives time to check top
# end readobjects.py


From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 11 00:26:12 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 11 Mar 2007 16:26:12 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<DThIh.10892$tD2.3813@newsread1.news.pas.earthlink.net>
	<pan.2007.03.10.13.45.29.402878@REMOVE.THIS.cybersource.com.au>
	<7xr6rxkqp6.fsf@ruckus.brouhaha.com>
	<pan.2007.03.10.23.53.01.619207@REMOVE.THIS.cybersource.com.au>
	<7xwt1or6j3.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.11.05.26.11.113389@REMOVE.THIS.cybersource.com.au>

On Sat, 10 Mar 2007 16:02:56 -0800, Paul Rubin wrote:

> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
>> > By your method, what is the probability of the first number being
>> > higher than 30?  What is the probability of the fifth number being
>> > higher than 30?  If these probabilities are unequal, can we really say
>> > the sequences are random?
>> 
>> Of course we can! "Uniform probability distribution" is a special case of
>> random. Most random quantities are far from uniform. The Python random
>> module includes a couple of non-uniform distributions, including
>> exponential distribution (random.expovariate) and the famous bell curve
>> distribution (random.normalvariate).
> 
> Ehh.  Say we call some generator repeatedly and get back the sequence
> (3, 3, 3, 3, 3, ...).  Would we say this is a random sequence using a
> distribution that puts 100% of the probability density at 3?  Or would
> we just say it isn't random?

Oh! You know that bit where I said that every imaginable sequence of
integers was random? I take it back.

Oh wait. I never said anything of the sort. Not every sequence of ints is
a random sequence.

Although... your question is deeper than it appears at first glance. In
any truly random sequence, you should expect to find repeated values. If
you wait long enough, you should get a sequence of 3,3,3... for any number
of threes you like. (Or, naturally, any other integer.) If you wait long
enough, you should get a billion threes.



-- 
Steven.



From j.spies at hccnet.nl  Tue Mar 27 12:55:20 2007
From: j.spies at hccnet.nl (Jaap Spies)
Date: Tue, 27 Mar 2007 18:55:20 +0200
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1175005457.115349.92940@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
	<1175005457.115349.92940@p15g2000hsd.googlegroups.com>
Message-ID: <eubi9o$o1e$1@news1.zwoll1.ov.home.nl>

Mark Morss wrote:

> 
> Maybe somebody reading this will be able to convince me to look again
> at Numpy/Scipy, but for the time being I will continue to do my
> serious numerical computation in Fortran.
> 

What I am missing in this discussion is a link to Pyrex to speed up
Python: Pyrex is almost Python with the speed of compiled C.
http://www.cosc.canterbury.ac.nz/greg.ewing/python/Pyrex/

Pyrex is adapted in SAGE (Software for Algebra and Geometry 
Experimentation) as Sagex: http://modular.math.washington.edu/sage/

Jaap


From albmont at centroin.com.br  Mon Mar 12 07:07:31 2007
From: albmont at centroin.com.br (Alberto Monteiro)
Date: Mon, 12 Mar 2007 09:07:31 -0200
Subject: New to Python
In-Reply-To: <55kmslF249ihcU1@mid.uni-berlin.de>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
Message-ID: <20070312110348.M44118@centroin.com.br>

I wrote:
> 
>> Hi, I am new to Python, how stupid can be the questions I ask?
>> 
>> For example, how can I add (mathematically) two tuples?
>> x = (1,2)
>> y = (3,4)
>> How can I get z = (1 + 3, 2 + 4) ?

Wow, I really didn't expect that my silly little newbie question
would get so many _different_ answers!

What is the best way to get documentation about the functions
and classes of python? I tried to google, but usually I can just
find the __doc__ of the objects, without examples or anything that
can help me use it.

Alberto Monteiro



From jon+usenet at unequivocal.co.uk  Mon Mar 12 15:18:06 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 12 Mar 2007 19:18:06 GMT
Subject: Watching a file another app is writing
References: <mOydnfTB9YK7x2nYnZ2dnUVZ_gydnZ2d@comcast.com>
	<1173676363.653940.133030@30g2000cwc.googlegroups.com>
	<jsgJh.9412$jx3.2696@newssvr25.news.prodigy.net>
Message-ID: <slrnevb9re.kdi.jon+usenet@snowy.squish.net>

In article <jsgJh.9412$jx3.2696 at newssvr25.news.prodigy.net>, John Nagle wrote:
>> On Unix a quick shortcut would be to simply read the output of 'tail -
>> f <file>' command...
> 
>     "tail -f" just checks the file size once a second.  It's not doing
> anything exciting.

That's not actually always true these days. *BSD, at least, use
'kqueue' to avoid busy-wait on "tail -f".


From ptmcg at austin.rr.com  Fri Mar 16 15:32:26 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Mar 2007 12:32:26 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
Message-ID: <1174073546.381358.129050@o5g2000hsb.googlegroups.com>

On Mar 16, 12:59 pm, tkp... at hotmail.com wrote:
> I have an ordered list e.g. x = [0, 100, 200, 1000], and given any
> positive integer y, I want to determine its appropriate position in
> the list (i.e the point at which I would have to insert it in order to
> keep the list sorted. I can clearly do this with a series of if
> statements:
>
> if y<x[1]:
>     n = 0
> elif y < x[2]:
>     n = 1
> elif y < x[3]:
>     n = 2
> else:
>     n = 3
>
> Or with a generator comprehension
> n  = sum ( y>x[i] for i in range(len(x)) ) - 1
>
> But there  has to be a cleaner way, as the first approach is unwieldy
> and does not adapt to changing list lengths, and the second is not
> obvious to a casual reader of the code.
>
> My list will typically have 2 to 5 items, so speed is not a huge
> issue. I'd appreciate your guidance.
>
> Sincerely
>
> Thomas Philips

List "will typically have 2 to 5 items"?  Keep it simple!

x.append(y)
x.sort()

-- Paul




From bj_666 at gmx.net  Fri Mar 30 06:35:54 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 30 Mar 2007 12:35:54 +0200
Subject: Game programming for kids: looking for open source 2D game
	development kit
References: <euid24$ugc$1@online.de> <5741ueF2bgl92U1@mid.uni-berlin.de>
	<euik44$93e$1@online.de>
Message-ID: <pan.2007.03.30.10.35.44.161070@gmx.net>

In <euik44$93e$1 at online.de>, Max Kubierschky wrote:

> What part of Squeak is targeted at 2D game development?

http://www.squeak.org/Features/FunandGames/

And also take a look at http://www.squeakland.org/ (Kids play ? Etoys)
which is a framework for children, that let's you paint objects and attach
behaviour to them.

Ciao,
	Marc 'BlackJack' Rintsch


From mwilson at the-wire.com  Thu Mar 29 00:11:06 2007
From: mwilson at the-wire.com (Mel Wilson)
Date: Thu, 29 Mar 2007 00:11:06 -0400
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <eue4tl$s12$1@sea.gmane.org>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com><1174916449.171929.138950@n76g2000hsh.googlegroups.com><pan.2007.03.26.22.17.16.194451@REMOVE.THIS.cybersource.com.au>	<2e4k03l8tj9oicmn8c21vobrnvkmdstabr@4ax.com>
	<eue4tl$s12$1@sea.gmane.org>
Message-ID: <eufe8q$bas$1@sea.gmane.org>

Terry Reedy wrote:
> "Tim Roberts" <timr at probo.com> wrote in message 
> news:2e4k03l8tj9oicmn8c21vobrnvkmdstabr at 4ax.com...
> | Once upon a time,
> | Basic enthusiasts would have used the word "tokenized" to describe .pyc 
> files.
> 
> Perhaps, but they would, I think, have been wrong.  Tokenized Basic to the 
> best of my knowledge, is a reversibly compressed version of the source 
> file.  The 'while' keyword, is there is one, is replaced by a number, but 
> no parsing is done.

Almost reversibly.  The giveaway was when you listed your BASIC 
program and all the keywords came out upper-case, regardless of what 
case you'd typed them in.

	Mel.



From gagsl-py2 at yahoo.com.ar  Sun Mar 11 07:46:58 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 08:46:58 -0300
Subject: threading and iterator crashing interpreter
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
Message-ID: <op.to0wckkhx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 07:32:04 -0300, Janto Dreijer <jantod at gmail.com>  
escribi?:

> I have been having problems with the Python 2.4 and 2.5 interpreters
> on both Linux and Windows crashing on me. Unfortunately it's rather
> complex code and difficult to pin down the source.
>
> So I've been trying to reduce the code. In the process it's started to
> crash in different ways. I'm not sure if any of it is related. The
> following is only crashing Python 2.5 (r25:51908, Sep 19 2006,
> 09:52:17) [MSC v.1310 32 bit (Intel)] on win32 in two different(?)
> ways.
>
> ====================
>
> Using the login1() function will throw a bunch of exceptions the most
> interesting of which is:
>
> Exception in thread Thread-34:
> Traceback (most recent call last):
>   File "C:\Python25\lib\threading.py", line 460, in __bootstrap
>     self.run()
>   File "C:\Python25\lib\threading.py", line 440, in run
>     self.__target(*self.__args, **self.__kwargs)
>   File "Copy of scratchpad.py", line 20, in login1
>     random.choice(System.sessions).session_iter.next()
> RuntimeError: instance.__dict__ not accessible in restricted mode

 From the error message, you appear to be using some form of restricted  
execution - RExec or similar. I didn't try that way, but using the normal  
mode, I got this different exception instead (using login1):

Exception in thread Thread-85:
Traceback (most recent call last):
   File "c:\apps\python\lib\threading.py", line 460, in __bootstrap
     self.run()
   File "c:\apps\python\lib\threading.py", line 440, in run
     self.__target(*self.__args, **self.__kwargs)
   File "crash.py", line 20, in login1
     random.choice(System.sessions).session_iter.next()
ValueError: generator already executing

It appears to indicate that you must syncronize the generators.
Adding a Lock object to Session appears to work OK:

class Session:
         def __init__(self):
                 self.lock = Lock()
                 self.session_iter = session_iter(self)

def login1():
         # first interpreter
         System.sessions.append(Session())
         while 1:
                 session = random.choice(System.sessions)
                 session.lock.acquire()
                 session.session_iter.next()
                 session.lock.release()

Your login2 version does not generate any error on my PC.

-- 
Gabriel Genellina



From jstroud at mbi.ucla.edu  Sat Mar 24 20:50:46 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 25 Mar 2007 00:50:46 GMT
Subject: "persistent" plot windows
In-Reply-To: <1174779770.134013.256280@b75g2000hsg.googlegroups.com>
References: <1174779770.134013.256280@b75g2000hsg.googlegroups.com>
Message-ID: <GHjNh.3040$Kd3.1944@newssvr27.news.prodigy.net>

Rodrigo Lopez-Negrete wrote:
> Hi all,
> 
> I'm trying to write a python script using plotting form pylab.
> Unfortunatelly I've encountered a problem. When I run the script via
> 'python myscript.py' the plot windows open and close very quickly, or
> when I added the show() command the shell window was locked until I
> closed the figures.
> 
> My question is: is there a way to open those windows in the background
> without blocking the shell and without running it interactively??
> something like gnuplot -persist?
> 
> Thanks all,
>   Rodrigo Lopez-Negrete
> 

python whatever.py &


(Don't forget the ampersand!)

James


From kyosohma at gmail.com  Wed Mar 21 16:11:48 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 21 Mar 2007 13:11:48 -0700
Subject: Python COM Outlook Question
In-Reply-To: <1174504504.910510.219050@b75g2000hsg.googlegroups.com>
References: <1174504504.910510.219050@b75g2000hsg.googlegroups.com>
Message-ID: <1174507908.631651.306870@d57g2000hsg.googlegroups.com>

On Mar 21, 2:15 pm, "liam_herron" <liam_her... at hotmail.com> wrote:
> Say I want to open a shared email inbox (named "DailyGoodEmails") that
> is different from my default Outlook inbox, how do I specify this?
>
> Currently, I would do:
>
> s = Dispatch("Outlook.Application")
> space = s.GetNameSpace("MAPI")
> inbox = space.GetDefaultFolder(6)
> myFolder = inbox.Folders[9] #open the folder i want
>
> I have no idea where the "6" comes from but I want to be able to
> specify "DailyGoodEmails" somewhere
> and be able to iterate over the emails.

I don't know how to do this, but I found you a couple websites that
should point you in the right direction:

http://www.boddie.org.uk/python/COM.html
http://webservices.xml.com/pub/a/ws/2003/05/13/email.html

Hope that helps.

Mike



From Robert.Katic at gmail.com  Sun Mar  4 08:24:25 2007
From: Robert.Katic at gmail.com (goodwolf)
Date: 4 Mar 2007 05:24:25 -0800
Subject: class attrdict
In-Reply-To: <1173009806.383478.50230@i80g2000cwc.googlegroups.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1173009806.383478.50230@i80g2000cwc.googlegroups.com>
Message-ID: <1173014665.610542.285520@v33g2000cwv.googlegroups.com>

On Mar 4, 1:03 pm, "goodwolf" <Robert.Ka... at gmail.com> wrote:
> On Mar 3, 4:25 am, a... at mac.com (Alex Martelli) wrote:
>
>
>
> > Hallvard B Furuseth <h.b.furus... at usit.uio.no> wrote:
>
> > > Does this class need anything more?
> > > Is there any risk of a lookup loop?
> > > Seems to work...
>
> > > class attrdict(dict):
> > >     """Dict where d['foo'] also can be accessed as d.foo"""
> > >     def __init__(self, *args, **kwargs):
> > >         self.__dict__ = self
> > >         dict.__init__(self, *args, **kwargs)
> > >     def __repr__(self):
> > >         return dict.__repr__(self).join(("attrdict(", ")"))
>
> > The problem is mostly that, given an instance a of attrdict, whether you
> > can call (e.g.) a.update(foo) depends on whether you ever set
> > a['update'], making the whole program extremely fragile -- a very high
> > price to pay for some modest amount of syntax sugar.
>
> > Alex
>
> Then you will prefer something like this:
>
> class Namespace(object):
>     def __init__(self, __ns={}, **kwargs):
>         if kwargs: __ns.update(kwargs)
>         self.__dict__ = __ns

oops, there is an error (empty dict is created once).
Here corrected one:

class Namespace(object):
    def __init__(self, __ns=None, **kwargs):
        if __ns is None:
            self.__dict__ = kwargs
        else:
            assert len(kwargs) == 0
            self.__dict__ = __ns

If you are familiar with JS then you can simulate JS Object:

class JSLikeObject(object):
    def __init__(self, __ns={}, **kwargs):
        if kwargs: __ns.update(kwargs)
        self.__dict__ = __ns
    def __getitem__(self, name):
        return getattr(self, name)
    def __setitem__(self, name, value):
        setattr(self, name, value)
    def __delitem__(self, name):
        delattr(self, name)
    def __iter__(self):
        return iter(self.__dict__)
    def __contains__(self, name):
        return hasattr(self, name)

but I don't sagest to use it in real life.



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  1 16:58:45 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 01 Mar 2007 22:58:45 +0100
Subject: python equivalent of bash find
In-Reply-To: <1172780082.961223.222500@s48g2000cws.googlegroups.com>
References: <1172780082.961223.222500@s48g2000cws.googlegroups.com>
Message-ID: <45e744c1$0$17997$426a74cc@news.free.fr>

BartlebyScrivener a ?crit :
> I recently moved from XP to Linux, but would like to use Python
> whenever possible.
> 
> line from bash script:
> 
> find ~/Mail -xdev -type f \( -mtime 0 -or -mtime 1 \) -exec cp -aPvu
> "{}" /backup-dest \;
> 
> What modules would I use to accomplish this in Python? Or any other
> Python tricks to copy or backup all files modified today?

MHO is that you'd better learn linux (well... Unix) tools. Reinventing 
the SquareWheel(tm) is usually not a good idea.


From troy.melhase at gmail.com  Sat Mar  3 03:20:16 2007
From: troy.melhase at gmail.com (Troy Melhase)
Date: Fri, 2 Mar 2007 23:20:16 -0900
Subject: print a ... z, A ... Z, "\n"' in Python
In-Reply-To: <a23effaf0703030007w3621b75du748c2cb1d9b0340b@mail.gmail.com>
References: <a23effaf0703030007w3621b75du748c2cb1d9b0340b@mail.gmail.com>
Message-ID: <d50f6c8a0703030020t44be5c50p8d2dbfe26f55846e@mail.gmail.com>

> How do you write Perl's
>
>     print a ... z, A ... Z,  "\n"' in Python
>
>
> In Python?

you might consider this cheating, but it's packed with zen goodness:

>>> import string
>>> print string.letters
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ


From http  Thu Mar 15 19:34:48 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 15:34:48 -0800
Subject: problem with str()
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
	<1173990743.998399.82020@b75g2000hsg.googlegroups.com>
Message-ID: <7xd53axeqv.fsf@ruckus.brouhaha.com>

kyosohma at gmail.com writes:
> methodList = [str for str in names if callable(getattr(obj, str))]
> 
> instead, do something like this:
> 
> methodList = [i for i in names if callable(getattr(obj, i))]

or:

   methodList = list(str for str in names if callable(getattr(obj, str)))

genexps, unlike listcomps, make a new scope for their index variable.


From gigs at hi.t-com.hr  Fri Mar  9 14:31:17 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 09 Mar 2007 20:31:17 +0100
Subject: tkinter text editor
In-Reply-To: <mailman.4808.1173376612.32031.python-list@python.org>
References: <espfgv$6q7$1@ss408.t-com.hr> <espfmi$7ev$1@ss408.t-com.hr>
	<mailman.4808.1173376612.32031.python-list@python.org>
Message-ID: <espoab$1ed$1@ss408.t-com.hr>

jim-on-linux wrote:
> On Friday 09 March 2007 12:04, Gigs_ wrote:
>> Gigs_ wrote:
>>> I'm writing text editor.
>>>
>>> How to enable/disable (cut, copy etc.) when
>>> text is selected/not selected
>> Btw it is cut copy ... in edit menu
> 
> 
> state = 'diabled'   ## no change allowed
>                            ## to Text Wiget  
> 
> state = 'normal'  ## default for Text Wiget
> 
> jim-on-linux
> http:\\www.inqvista.com
yes man but i want to make that when there is no selected text this menu 
items go DISABLED and when text is selected this menu items go NORMAL


From richarddotjebbatpcfltd.co.uk  Fri Mar  2 15:27:48 2007
From: richarddotjebbatpcfltd.co.uk (Richard Jebb)
Date: Fri, 2 Mar 2007 20:27:48 -0000
Subject: Strange method signature via COM
References: <45e8087b$0$765$5a6aecb4@news.aaisp.net.uk>
	<45e87c5e$0$7504$426a74cc@news.free.fr>
Message-ID: <45e88963$0$760$5a6aecb4@news.aaisp.net.uk>

After digging around in the group archives I've figured it out. It's not
been helped by my inability to identify the API's COM server/type library in
the list produced by the MakePy utility, so I've largely been flying blind.

Some posts on this same subject back in 1999 revealed the answer, namely
that when win32com encounters a method signature like the one we had, it
expects you to call it like this:

obj.Value("myfield", "newvalue")

If there already exists an interface to Value() with this signature, then it
prepends the original method name with "Set", so that in Python you would
call

obj.SetValue("myfield", "newvalue")

We still have some other issues with the API, but I'm hoping once the
application vendor has revealed what name it will appear under in MakePy we
will be able to sort those out as well.


"Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> wrote in
message news:45e87c5e$0$7504$426a74cc at news.free.fr...
> Richard Jebb a ?crit :
> > We are trying to use the API of a Win32 app which presents the API as a
COM
> > interface. The sample VB code for getting and setting the values of
custom
> > data fields on an object shows a method named Value():
> >
> > getter        obj.Value("myfield")
> > setter        obj.Value("myfield") = newvalue
> >
> > Using Python 2.5 and PythonWin we can get data from data fields using
the
> > identical syntax
>
> I have no experience with Python/COM, but IIRC, in VB (at least in VB6),
> the parens are also used for array subscript.
>
> >
> >>>>print comp.Value("Phone1")
> > 99080980
> >
> > However the set value fails (unsurprisingly)
> >
> >
> >>>>comp.value("Phone1") = "6876876876"
> >
> > SyntaxError: can't assign to function call
> >
> > Does anyone have any idea how to use Python to address this type of
method
> > signature?
>
> Have you tried inspecting your COM object in an interactive Python
> shell, using dir(), help() and the inspect module ?
>
> And FWIW, disd you try the following syntaxes:
> comp.value['Phone1'] = "xxx"
> comp['Phone1'] = "xxx"
>
> My 2 cents




From esj at harvee.org  Sun Mar 25 12:44:54 2007
From: esj at harvee.org (Eric S. Johansson)
Date: Sun, 25 Mar 2007 12:44:54 -0400
Subject: organizing collections of small modules
Message-ID: <eu68uf$bkn$1@sea.gmane.org>

I have a bunch of small modules that I use within my application.  Most 
of these modules are single file modules.  Currently, I have them set up 
as stand-alone modules but because it's a royal pain to fetch five or 10 
of these modules for each application and tracking whether or not they 
are all up to date, I'm considering putting them all into one collection 
(rcsoc  a.k.a. random cross-section of code[1]) so it's easier to load, 
install, and manage.

Are there better techniques for managing collections of modules in 2.4 
or later?

---eric


[1]  derives from the expression that hamburger is "random cross-section 
of cow"



From rschroev_nospam_ml at fastmail.fm  Sun Mar 18 19:27:44 2007
From: rschroev_nospam_ml at fastmail.fm (Roel Schroeven)
Date: Sun, 18 Mar 2007 23:27:44 GMT
Subject: fifo queue
In-Reply-To: <1174257160.540073.113380@b75g2000hsg.googlegroups.com>
References: <1174257160.540073.113380@b75g2000hsg.googlegroups.com>
Message-ID: <QVjLh.74099$NE5.553089@phobos.telenet-ops.be>

drochom schreef:
> hi,
> 
> how would u improve this code?
> 
> class queue:
 > ...

I think I'd use collections.deque [1] instead of using a ring buffer as 
you're doing (I think) and doing a lot of manual bookkeeping.

[1] http://docs.python.org/lib/deque-objects.html



-- 
If I have been able to see further, it was only because I stood
on the shoulders of giants.  -- Isaac Newton

Roel Schroeven


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 03:50:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 05:50:16 -0300
Subject: Problem with Packages
References: <1173332271.733596.159790@p10g2000cwp.googlegroups.com>
	<mailman.4788.1173334443.32031.python-list@python.org>
	<1173342404.977567.241310@30g2000cwc.googlegroups.com>
Message-ID: <op.tou352tzx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 05:26:45 -0300, Srikanth <sri1025 at gmail.com> escribi?:

>> It appears that you forgot the basic rule: a package is a directory with
>> an __init__.py file (even if empty).
>
> Exactly right. I didn't know that __init__.py is a mandatory one.
> Thanks for pointing out.

You may want to review this section on the Python Tutorial, covering  
packages:  
http://docs.python.org/tut/node8.html#SECTION008400000000000000000

>> You need 4 of such files here.
>
> Thanks again for saying 4, cause I would have definetly put only 2
> (inside dir1_1 and dir2_2)

That was absolutely intentional :) so you had to figure out *where* to put  
the __init__.py files...

>> Maybe PyDev plays some tricks with PYTHONPATH or something...
>>
> I got the same doubt and I checked PyDev before posting, the
> PYTHONPATH is exactly the same but I didn't notice or rather
> overlooked __init__.py file it created automatically when I created
> packages using the dialogs.

Ah, those automagical tools...

> Thanks you Gabriel!

I'm glad you found it helpful!

-- 
Gabriel Genellina



From nagle at animats.com  Tue Mar 20 13:44:51 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 20 Mar 2007 17:44:51 GMT
Subject: Anything available that can read Microsoft .MDB files from Python?
In-Reply-To: <mailman.5326.1174380500.32031.python-list@python.org>
References: <vdBLh.1337$rj1.1043@newssvr23.news.prodigy.net>	<56863eF27p5bmU1@mid.uni-berlin.de>	<WLBLh.10082$M65.2647@newssvr21.news.prodigy.net>	<569ih4F27o9bdU1@mid.uni-berlin.de>
	<mailman.5326.1174380500.32031.python-list@python.org>
Message-ID: <n4VLh.9508$Um6.4602@newssvr12.news.prodigy.net>

Shane Geiger wrote:
> Try installing it from source.  Perhaps getting a newer verion is all 
> you would need.  If at that point you find there is a bug, report it.

    I did.

    I finally got MDBtools to build by throwing out all the "configure"
stuff and the makefiles, then writing some simple makefiles of my own
that just build the command line tools.  The supplied build files
fail if you don't have bison, flex, autoconf, etc., although the
documentation claims otherwise.

    There are some nice little command line tools in there,
fighting to get out from under all the guck.  The original
author intended, I think, to build this thing up into a full
database module for .MDB files.  But that was back around 2004
and never got done.  So MDBtools doesn't have enough stuff
to directly interface to MDB databases as databases, but
it has too much for a file format converter.  It's the extra
guck that has portability problems.

    I posted the makefiles I used to the MDBtools forums on
SourceForge.

				John Nagle


From kyosohma at gmail.com  Mon Mar 26 09:40:49 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 06:40:49 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1174916449.171929.138950@n76g2000hsh.googlegroups.com>

On Mar 26, 8:20 am, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
> OK...
> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??
> Thanks
> Chris

While I have never personally dealt with Fortran, I looked it up here:

http://en.wikipedia.org/wiki/Fortran_code_examples

The code examples speak for themselves. I recommend you look those
over and then look over similar simple program written in Python.
Python is still easier to read. Fortran also appears to be a compiled
language, whereas Python is an interpreted language. Thus, Python
programs can be tested faster. Fortran programs will likely run faster
though.

Check out www.python.org for good examples of Python code for the
beginner and the advanced programmer.

Mike



From gregorywieber at gmail.com  Sat Mar 31 14:32:43 2007
From: gregorywieber at gmail.com (gregorywieber at gmail.com)
Date: 31 Mar 2007 11:32:43 -0700
Subject: Newbie Question (real-time communication between apps: audio, 3d,
	PD, Blender)
In-Reply-To: <460e7283$0$27377$ba4acef3@news.orange.fr>
References: <1175294306.124030.272350@l77g2000hsb.googlegroups.com>
	<460e7283$0$27377$ba4acef3@news.orange.fr>
Message-ID: <1175365963.795610.56780@d57g2000hsg.googlegroups.com>

Thank you, everyone!

On Mar 31, 6:43 am, Laurent Pointal <laurent.poin... at wanadoo.fr>
wrote:
> gregorywie... at gmail.com wrote:
> > Hi All,
>
> > I'm just beginning my exploration of Python and I have a rather
> > general question. If two particular programs have Python scripting
> > capabilities, does that mean those two programs can communicate in
> > real time through Python?
>
> > I'm running some audio experiments (for artistic purposes) in the
> > program Pure Data (PD). I would like to use data that I extract from
> > audio files to affect 3-d game simulations in Blender.  I don't know
> > specifically what it is I would be manipulating -- this is an artistic
> > project, so intend to do a lot of experimenting to see what I come up
> > with...
>
> > My question(s): Is this possible, reasonable, plausible?
>
> Plausible, with a recent PC.
>
> I use some Java code + a research TTS engine (C) + Python code + Pure Data +
> VirChor (3D renderer+interract, C++) in a TalkingHead project at LIMSI.
> All these communicate via UDP, we just tries to keep amount of transmitted
> data not too huge (ie. just transmit status, positions, commands...).
> For the realtime side capacity, it depend on the process you need in
> Python - if Python reveal to be too slow, you may write long computing code
> into a separate C module or library (may see ctypes and pyrex).
> Another point, if you build Python multithreading code in same process, the
> Global Lock may lead to unefficient use of your computing capacities.
>
> Note. You may take a look at OSC (Open Sound Control), there is a module for
> PD and one for Python.
>
> A+
>
> Laurent.




From claird at lairds.us  Wed Mar 21 18:31:25 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 21 Mar 2007 22:31:25 +0000
Subject: Wikipedia and a little piece of Python History
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<871wjiuz5q.fsf@pobox.com>
	<1174508599.250404.176510@y66g2000hsf.googlegroups.com>
Message-ID: <tao8d4-uns.ln1@lairds.us>

In article <1174508599.250404.176510 at y66g2000hsf.googlegroups.com>,
Paddy <paddy3118 at googlemail.com> wrote:
>On Mar 21, 8:20 pm, j... at pobox.com (John J. Lee) wrote:
>> "Paddy" <paddy3... at googlemail.com> writes:
>> > I just had a link to Tim peters first post on doctest:
>> >http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
>> > removed fromhttp://en.wikipedia.org/wiki/Doctestas it doesn't fit
>> > their guidelines for external links.
>> > I wonder, could maybe the official website be persuaded to host a copy
>> > so that it could be linked to?
>>
>> > Tim, would you object?
>>
>> It (wikipedia) is a wiki, why not edit the page and paste it in?
>>
>> John
>
>They have rules, and periodically trawl pages and clean them. I'd like
>to stay within the rules.
>
>- Paddy.
>

Phaseit would be honored to memorialize a permanent URL for
that post, or even the thread from which it's taken.  Is that
an appropriate resolution, Paddy?


From diefirma at comcast.net  Tue Mar  6 17:34:53 2007
From: diefirma at comcast.net (Nile)
Date: 6 Mar 2007 14:34:53 -0800
Subject: When will 2.5.1 be released?
In-Reply-To: <1173208347.506758.166620@30g2000cwc.googlegroups.com>
References: <1173037797.127119.248300@h3g2000cwc.googlegroups.com>
	<1173208347.506758.166620@30g2000cwc.googlegroups.com>
Message-ID: <1173220493.492862.299210@q40g2000cwq.googlegroups.com>

On Mar 6, 1:12 pm, "A. Lloyd Flanagan" <A.Lloyd.Flana... at gmail.com>
wrote:
> On Mar 4, 2:49 pm, "Nile" <diefi... at comcast.net> wrote:
>
> > This is not a big deal but I would like to use Tix with 2.5.  My
> > understanding is this bug will be fixed in the 2.5.1 release. Does
>
> And while we're waiting for 2.5.1, can somebody post a clear (as
> opposed to the one that comes with Tix ;)) explanation of how to
> manually install Tix into python 2.5?  It should be possible...

LLoyd
-Not possible - this is a known bug and won't be fixed until 2.5.1



From frank-python at benkstein.net  Thu Mar 22 13:11:46 2007
From: frank-python at benkstein.net (Frank Benkstein)
Date: Thu, 22 Mar 2007 18:11:46 +0100
Subject: challenge ?
In-Reply-To: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
References: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
Message-ID: <20070322181146.6ac4999d@localhost>

Hi,

On 22 Mar 2007 09:41:43 -0700
"alain" <alainpoint at yahoo.fr> wrote:

> I have a problem I wonder if it has been solved before.
> I have a dictionnary and I want the values in the dictionnary to be
> annotated with the rank that would be obtained by sorting the values
> 
> def annotate_with_rank(my_dict):
> 	....
> 	return my_annotated_dict
> 
> In other words, any value a_value would become a 2-tuple
> (a_value,rank_of_a_value)
> 
> I seek an elegant solution.

In your specification of the problem it is unclear what should be done
with duplicate values. My solution assigns every value a different
rank (starting from 0) such that the highest rank is len(my_dict) - 1.

def annotate_with_rank(my_dict):
    items = my_dict.items()
    items.sort(key = lambda (k, v): v)
    return dict((k, (i, v)) for i, (k, v) in enumerate(items))

Best regards,
Frank Benkstein.


-- 
GPG (Mail): 7093 7A43 CC40 463A 5564  599B 88F6 D625 BE63 866F
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From torriem at chem.byu.edu  Sat Mar 31 23:40:51 2007
From: torriem at chem.byu.edu (Michael Torrie)
Date: Sat, 31 Mar 2007 21:40:51 -0600
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
In-Reply-To: <%4FPh.17001$PL.7906@newsread4.news.pas.earthlink.net>
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
	<yfsirchf04z.fsf@oc.ex.ac.uk>
	<1175387715.022063.171570@b75g2000hsg.googlegroups.com>
	<%4FPh.17001$PL.7906@newsread4.news.pas.earthlink.net>
Message-ID: <1175398851.25928.24.camel@enterprise>

On Sun, 2007-04-01 at 02:49 +0000, Dennis Lee Bieber wrote:
> 	Take that up with ACT... GNAT 3.15p was explicitly unencumbered, but
> the current version of GNAT, in the GPL (no-service contract) form has
> gone the other direction, claiming that executables must be released
> GPL.

The no-service contract version of the GPL is not the same as the
standard GPLv2.  Ordinarily the GPLv2 does not apply to the output of
the program unless the license specifies that it does (a modification or
addendum).  Thus the output of a program is not part of the GPL usually,
unless specified  MySQL's take on the GPLv2 without an addendum is
mistaken, in my opinion.  However, copyright law probably still applies
to the programs output regardless of license, but in what way I don't
think the courts have ever specified, given that the output depends
largely on the input.  GCC, Bison, and Flex, all explicitly state that
the output of the program is not under any license, and is your own
property.  Perhaps the author of Shed Skin could make a note in the
license file to clarify the state of the output of his program.

There should be no problem with this Shed Skin program being under the
GPL and using it with python scripts that are not under the GPL.  But if
you have any concern with a copyright license at all, you should consult
your lawyer.  Too many companies see GPL'd programs as a free ride, not
willing to accept that they need a copyright license to use the code
just as they would with any code from any source.  It's sad to see
because free software gets an unfair bad rap because of the greed of
others.  On the other hand, others take an overly paranoid view of the
GPL and pretend it is viral and somehow magically infects your code with
the GPL license, which is false--if you use GPL'd code in your non GPL'd
application then you are in a copyright violation situation and your
only options are to either GPL your code or remove the offending GPL'd
source from your code and write your own dang code, thank you very much.





From syrax6l at hotmail.com  Sat Mar 17 02:54:22 2007
From: syrax6l at hotmail.com (Milton Segura)
Date: Sat, 17 Mar 2007 05:54:22 -0100
Subject: No subject
Message-ID: <BAY124-W4390D360B0869706CB42B4F4700@phx.gbl>

Hello, I'm trying to exclude files from a list using the following code:
 
for item in dirs:    if item.find('Software') > -1:        dirs.remove(item)    elif item.find('Images') > -1:        dirs.remove(item)
 
let's supose dirs = ['C:\Images', 'C:\Images\2006', 'C:\Images\2007', 'C:\Music', 'C:\Files', 'C:\Software', 'C:\Software\Python', 'C:\Software\iTunes']
 
For some reason.. it just won't exclude them.
I'd like to know why and how to fix it.
Thanks in advance.
Milton
_________________________________________________________________
Explore the seven wonders of the world
http://search.msn.com/results.aspx?q=7+wonders+world&mkt=en-US&form=QBRE
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From kyosohma at gmail.com  Tue Mar 27 14:15:54 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 11:15:54 -0700
Subject: How can I catch all exception in python?
In-Reply-To: <1175018958.602131.145190@y80g2000hsf.googlegroups.com>
References: <1175018958.602131.145190@y80g2000hsf.googlegroups.com>
Message-ID: <1175019354.070308.4080@l77g2000hsb.googlegroups.com>

On Mar 27, 1:09 pm, "ying... at gmail.com" <ying... at gmail.com> wrote:
> I read the document here about exception handling in python:
>
> http://www.diveintopython.org/file_handling/index.html
>
> Can you please tell me how can I catch all exception in python?
> like this in Java:
> try {
>  ....
>
> } catch (Throwable t) {
>  ...
> }

Technically speaking, you can catch all errors as follows:

try:
   # do something
except Exception, e:
   print e


However, this is NOT the recommended way of handling errors. Typically
you catch only expected errors, such as when you open a file, you
check for an IOError. By catching all errors, you will learn less and
likely have hard-to-understand bugs in your program.

Mike



From arnodel at googlemail.com  Sat Mar 17 18:08:03 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 17 Mar 2007 15:08:03 -0700
Subject: Still the __new__ hell ...
In-Reply-To: <1174167360.522350@jubilee.claranet.pt>
References: <1174167360.522350@jubilee.claranet.pt>
Message-ID: <1174169283.313703.157020@n59g2000hsh.googlegroups.com>

On Mar 17, 9:31 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Sorry to put here too many questions about __init__ __new__
> stuff but I always found a new problem when using them.
> I have searched for simple __new__ docs on how to do the
> basic things but find none.
>
> After trying the solutions people gently posted here
> (thanks) I run into new trouble when I go with further
> development.
>
> Here is the new situation.
>
> As suggested in a previous post, I used __new__ to
> subclass date class but now cPickle/pickle loads
> does not work.
>
> from datetime import date
> import cPickle,string
>
> class MyDate(date):
>         def __new__(cls,year,month=None,day=None):
>                 if type(year) is str:
>                         year,month,day=map(int,string.split(year,'-'))
>                 if year<100:
>                         year+=2000
>                 return date.__new__(cls,year,month,day)
>
> class C1(object):
>         def __init__(self):
>                 self.x=MyDate("2007-3-15")
>
>         def f(self):
>                 print self.x
>
> c1=C1()
>
> d=cPickle.dumps(c1)
> c2=cPickle.loads(d)
> c2.f()

I haven't tried your code but I think that you may need to define a
__reduce__ method in your MyDate class in order to give a clue to the
python as to how to pickle its instances.  For more details see:

http://docs.python.org/lib/node321.html

Something like:

class MyDate(date):
    ...
    def __reduce__(self):
        return type(self), (self.year, self.month, self.day)

might solve your problem.

HTH

--
Arnaud



From lobais at gmail.com  Fri Mar  2 18:56:23 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 00:56:23 +0100
Subject: classes and functions
References: <mailman.4613.1172874373.32031.python-list@python.org>
Message-ID: <pan.2007.03.02.23.56.02@gmail.com>

Den Fri, 02 Mar 2007 19:26:08 -0300 skrev Silver Rock:

> Friends,
> 
> I don?t see why using classes.. functions does everything already. I
> read the Rossum tutotial and two other already.
> 
> Maybe this is because I am only writing small scripts, or some more
> serious misunderstandings of the language.
> 
> Please give me a light.

I guess you are fimiliar with the string methods. You can do stuff like 
"hi hi".split(" ") or "  hi".strip().
This is because a string is a class.
The same functionality could be done by functions:
split("hi hi", " ") and strip("  hi")
but it feals more inituitive to put the dot after the variable.
It also makes it easier to know where to look for functions related to 
the object.

And yes, I'm sure you will see the light, when doing larger programs :) 
Don't worry.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 15 04:36:32 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 15 Mar 2007 09:36:32 +0100
Subject: Attribute monitoring in a class
In-Reply-To: <mailman.5117.1173914846.32031.python-list@python.org>
References: <mailman.5071.1173868190.32031.python-list@python.org>	<45f7d65b$0$23624$426a74cc@news.free.fr>	<45F7F242.9070002@gmail.com>
	<mailman.5117.1173914846.32031.python-list@python.org>
Message-ID: <45F90590.1030601@wtf.websiteburo.oops.com>

Gabriel Genellina a ?crit :
> En Wed, 14 Mar 2007 10:01:54 -0300, Joel Andres Granados 
> <joel.granados at gmail.com> escribi?:
> 
>> Bruno Desthuilliers wrote:
>>> Joel Andres Granados a ?crit :
> 
>>>> I'm
>>>> working with code that is not of my authorship and there is a class
>>>> attribute that is changes by directly referencing it (object.attr =
>>>> value) instead of using a getter/setter (object.setAttr(Value) )
> 
>>> yes : object.__setattr__(self, name, value)
>> I used this ^^^^^^^^^^^^^^^ one.  Thank for the help.
> 
> The problem with __setattr__ is that it slows down significantly *all* 
> attributes.
> Yours is the typical case when it's good to switch from using simple 
> attributes to using properties. 

If this has to become a feature of the class, yes, indeed. If it's just 
a temporary hack for debugging, the using the __getattr__ hook is 
quicker and less intrusive.



From __peter__ at web.de  Sat Mar 31 12:39:48 2007
From: __peter__ at web.de (Peter Otten)
Date: Sat, 31 Mar 2007 18:39:48 +0200
Subject: Sorting a multidimensional array by multiple keys
References: <pan.2007.03.31.12.43.14@no.spam.plz>
	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
	<pan.2007.03.31.13.42.19@no.spam.plz>
	<pan.2007.03.31.13.45.32@no.spam.plz>
	<Xns9904AA252EC47duncanbooth@127.0.0.1>
Message-ID: <eum2sa$1gp$03$1@news.t-online.com>

Duncan Booth wrote:

>>>> from operator import itemgetter
>>>> data.sort(key=itemgetter(0))
>>>> data.sort(key=itemgetter(1))
>>>> data.sort(key=itemgetter(4))
>>>> data.sort(key=itemgetter(3))

Or, in Python 2.5:

>>> data.sort(key=itemgetter(3, 4, 1, 0))

Peter


From openopt at ukr.net  Wed Mar 14 13:17:05 2007
From: openopt at ukr.net (dmitrey)
Date: 14 Mar 2007 10:17:05 -0700
Subject: Python equivalents to MATLAB str2func, func2str, ischar, isfunc?
In-Reply-To: <yfsy7lz7o0v.fsf@oc.ex.ac.uk>
References: <1173891444.243400.41690@e65g2000hsc.googlegroups.com>
	<yfsy7lz7o0v.fsf@oc.ex.ac.uk>
Message-ID: <1173892625.206379.263780@d57g2000hsg.googlegroups.com>

Thank you
(however in MATLAB ischar is the same as isstr)
but what if I don't know the name of module?
I.e. I have

def myfunc(param): ...
#where param can be both funcName or a function, and I want to obtain
both name and func, something like
if isinstance(param, basestring):
   func, funcName = <something>, param
else: func, funcName = param, param.__name__
what should I type instead of <something>?

D.



On Mar 14, 7:06 pm, Alexander Schmolck <a.schmo... at gmail.com> wrote:
> "dmitrey" <open... at ukr.net> writes:
> > I can't find these via web serch
>
> > thank you in advance,
> > Dmitrey
>
> str2func: getattr(some_module, 'f')
> func2str: f.__name__
> ischar: isinstance(x, basestring) and len(x) == 1
> isfunc: callable(x) # is most likely to be what you want
>
> 'as




From bbxx789_05ss at yahoo.com  Sun Mar 18 21:07:49 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 18 Mar 2007 18:07:49 -0700
Subject: * operator--as in *args?
In-Reply-To: <1174254032.155494.228530@e65g2000hsc.googlegroups.com>
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
	<1174254032.155494.228530@e65g2000hsc.googlegroups.com>
Message-ID: <1174266469.127020.186120@l77g2000hsb.googlegroups.com>

On Mar 18, 3:40 pm, "Dustan" <DustanGro... at gmail.com> wrote:
> For example:
> aFunction(*(1,2,3))
> is equivalent to:
> aFunction(1,2,3)
>

That's the context I've seen it in, but written like this:

someFunc(*args)

I played around with it a little bit, and it appears the * operator
unpacks a list, tuple, or dictionary so that each element of the
container gets assigned to a different parameter variable.  Although
with a dictionary, only the keys appear to be assigned to the
parameter variables, e.g.:

def g(a,b,c):
        print a, b, c

dict = {"x":10, "y":20, "z":30}
g(*dict)

Is that right?





From p_shakil at yahoo.com  Mon Mar  5 19:25:03 2007
From: p_shakil at yahoo.com (p_shakil at yahoo.com)
Date: 5 Mar 2007 16:25:03 -0800
Subject: Interface Implementation in Python
Message-ID: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>

Hi,

 I would like to know the interface concept in Python.How the
Interface is defined and implemented in Python?.

How to access the interface fromn Client?

Thanks
PSB



From bbxx789_05ss at yahoo.com  Fri Mar 16 11:38:54 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 08:38:54 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
Message-ID: <1174059534.271524.175440@b75g2000hsg.googlegroups.com>

The general idiom for altering lines in a file is to open the original
file and write the alterations to a temp file. After you are done
writing to the temp file, delete the original file, and change the
temp file name to the original file name.

If instead you were to read the whole file into a variable, and then
start overwriting the original file with the altered data, if your
program should happen to crash after writing one line to the file, all
the data in your variable would disappear into the ether, and your
file would only contain one line of data.  You can imagine what that
would be like if you had lots of important data in the file.

Here's my attempt that incorporates a temp file:

-----
import os

filepath = "./change_files"

li = os.listdir(filepath)
for name in li:
        fullpath = filepath + "/" + name
        if os.path.isfile(fullpath):
                infile = open(fullpath, 'r')

                lastDotPos = fullpath.rfind(".")
                fileName = fullpath[:lastDotPos]
                ext = fullpath[lastDotPos:]
                tempName = fileName + ext + ".temp"

                outfile = open(tempName, "w")
                for line in infile:
                        outfile.write(line + "altered\n")
                outfile.close()

                os.remove(fullpath)
                os.rename(tempName, tempName[:-5])
---------------

I think it also needs some kind of check to make sure you have
permissions to delete the original file.



From tim.one at comcast.net  Sun Mar 11 17:15:59 2007
From: tim.one at comcast.net (Tim Peters)
Date: Sun, 11 Mar 2007 16:15:59 -0500
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
Message-ID: <Xns98F0AFA4DC7DAtim111one@216.196.97.136>

[attribution lost]
...
>>> Yup: the workaround seems to be as simple as replacing all 
occurrences
>>> of -0.0 with -(0.0).  I'm embarrassed that I didn't figure this out
>>> sooner.
>>> 
>>> >>> x, y = -(0.0), 0.0
>>> >>> x, y
>>> (-0.0, 0.0)

[Alex Martelli]
>> Glad it works for you, but it's the kind of workaround that could
>> break with any minor tweak/optimization to the compiler...
>> very fragile:-(.

[also Alex]
> OTOH, Python 2.4 works just fine...:
>
> Python 2.4.3 (#1, Apr  7 2006, 10:54:33) 
> [GCC 4.0.1 (Apple Computer, Inc. build 5250)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> 0.0,-0.0
> (0.0, -0.0)
> >>> -0.0,0.0
> (-0.0, 0.0)
>
> so it seems to be very specifically a 2.5 problem.

It's a bug that keeps resurfacing, probably because there's no portable 
way to test that it stays fixed :-( (it's not an accident that the OP 
relied on atan2 to distinguish +0.0 from -0.0!  they act the same in 
/almost/ all contexts).

Python's grammar doesn't have negative numeric literals.  Instead

    "-" CONSTANT_LITERAL

looks like unary minus applied to the non-negative CONSTANT_LITERAL.  
All early versions of Python worked that way too.

The first time the +/- 0.0 bug occurred is when the front end was 
changed to act as if

    "-" CONSTANT_LITERAL

were a literal in its own right, and then that +0.0 == -0.0 caused the 
first instance of either in a compilation unit to be used as the value 
for all instances of both throughout the compilation unit.  That was 
fixed by refusing to apply the optimimization if the value of 
CONSTANT_LITERAL was a float that compared equal to 0.0.

2.5 introduced a new front end and more ambitious constant-folding, and 
I expect the bug showed up again due to one of those.

Note:  printing the value of a float 0 may not reveal its sign.  IIRC, 
glibc's float-to-string routines do display the sign of 0, but 
Microsoft's do not.  However, atan2() is sensitive to the sign under 
both glibm and Microsoft's libm equivalent.


From cjlesh at gmail.com  Wed Mar 21 14:10:27 2007
From: cjlesh at gmail.com (cjl)
Date: 21 Mar 2007 11:10:27 -0700
Subject: parsing tables with beautiful soup?
In-Reply-To: <1174499030.042369.312350@n76g2000hsh.googlegroups.com>
References: <1174499030.042369.312350@n76g2000hsh.googlegroups.com>
Message-ID: <1174500627.339029.65590@n76g2000hsh.googlegroups.com>

This works:

for row in soup.find("table",{"class": "class_name"}):
	for cell in row:
		print cell.contents[0]

Is there a better way to do this?

-cjl



From __peter__ at web.de  Tue Mar 20 17:42:51 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 Mar 2007 22:42:51 +0100
Subject: How to copy a ClassObject?
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
	<Xns98F993D63F87Dmosornet@161.53.160.64>
	<etpdhc$1gbh$1@ulysses.news.tiscali.de>
Message-ID: <etpkcp$8ka$00$1@news.t-online.com>

Stargaming wrote:

> Leave out the `new` module and use `type()` (exactly the same call as to
> `new.classobj`) to achieve the same effect.

No. new.classobj() creates a classic class whereas type() creates a
new-style class. Also, 

 >>> class First: pass
...
>>> type("Tmp", (First,), {})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: a new-style class can't have only classic bases

Peter


From nagle at animats.com  Sat Mar 10 19:20:45 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 10 Mar 2007 16:20:45 -0800
Subject: merits of Lisp vs Python
In-Reply-To: <87zm6kzodq.fsf@pobox.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
Message-ID: <DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>

John J. Lee wrote:
> John Nagle <nagle at animats.com> writes:
> [...]
> 
>>    Python, on the other hand, is uphill all the way.  Constant trouble
>>with version issues, especially with C components called from Python.
>>MySQLdb, M2Crypto, SSL - they all have platform/version
>>incompatibility problems.  I just spent three days making M2Crypto
>>work on a new Linux server with a different Red Hat version.
>>Neither Python's packaging tools nor the platform's packaging
>>tools deal adequately with these issues.
> 
> [...]
> 
> You haven't been using mod_python, by any chance?
> 
> 
> John

    No, haven't started to deal with that yet.  Still using
CGI.  Not sure whether to use mod_python or fastcgi for the
small requests where the Python load time swamps the time
to do one SQL select and reply.  Comments?

				John Nagle


From ziga.seilnacht at gmail.com  Sun Mar  4 03:14:23 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 4 Mar 2007 00:14:23 -0800
Subject: How to set docstrings for extensions supporting PyNumberMethods?
In-Reply-To: <1172948422.661418.312560@8g2000cwh.googlegroups.com>
References: <1172948422.661418.312560@8g2000cwh.googlegroups.com>
Message-ID: <1172996063.517322.208220@j27g2000cwj.googlegroups.com>

Nick Alexander wrote:
> Hello,
>
> I am writing a python extension (compiled C code) that defines an
> extension type with PyNumberMethods.  Everything works swimmingly,
> except I can't deduce a clean way to set the docstring for tp_*
> methods.  That is, I always have
>
> type.__long__.__doc__ == 'x.__long__() <==> long(x)'
>
> which a quick glance at the Python 2.5 source shows is the default.
>
> I have found that I can use PyObject_GetAttr and PyWrapperDescrObject
> and set the descriptor objects d_base->doc to a char pointer... but I
> can't tell if this is safe.  Or the right way to do it.
>
> If I'm on the wrong list, please let me know!
> Thanks,
> Nick Alexander

I think that the right way is to add the methods to the tp_methods
slot and use METH_COEXIST in the PyMethodDef flags field. Example:

/* start of silly module */
#include "Python.h"

typedef struct {
    PyObject_HEAD
    double value;
} SillyNumber_Object;

/* Forward declarations */
static PyTypeObject SillyNumber_Type;

#define SillyNumber_Check(op) PyObject_TypeCheck(op,
&SillyNumber_Type)

static PyObject *
new_SillyNumber(PyTypeObject *type, double value)
{
    PyObject *self;

    self = type->tp_alloc(type, 0);
    if (self == NULL)
        return NULL;

    ((SillyNumber_Object *)self)->value = value;
    return self;
}

static PyObject *
SillyNumber_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
    double value = 0.0;
    static char *kwlist[] = {"value", 0};

    if (!PyArg_ParseTupleAndKeywords(args, kwds, "|d:SillyNumber",
                                     kwlist, &value))
        return NULL;

    return new_SillyNumber(type, value);
}

static PyObject *
SillyNumber_add(PyObject *left, PyObject *right)
{
    double sum;

    if (!SillyNumber_Check(left) || !SillyNumber_Check(right)) {
        Py_INCREF(Py_NotImplemented);
        return Py_NotImplemented;
    }

    sum = (((SillyNumber_Object *)left)->value +
           ((SillyNumber_Object *)right)->value);

    return new_SillyNumber(&SillyNumber_Type, sum);
}

static PyObject *
SillyNumber_radd(PyObject *right, PyObject *left)
{
    return SillyNumber_add(left, right);
}

static PyNumberMethods SillyNumber_as_number = {
    SillyNumber_add,    /* nb_add */
    0,                  /* nb_subtract */
    0,                  /* nb_multiply */
    0,                  /* nb_divide */
    0,                  /* nb_remainder */
    0,                  /* nb_divmod */
    0,                  /* nb_power */
    0,                  /* nb_negative */
    0,                  /* nb_positive */
    0,                  /* nb_absolute */
    0,                  /* nb_nonzero */
};

static PyMethodDef SillyNumber_methods[] = {
    {"__add__", SillyNumber_add, METH_O | METH_COEXIST,
        "Add two SillyNumbers."},
    {"__radd__", SillyNumber_radd, METH_O | METH_COEXIST,
        "Same as __add__."},
    {NULL, NULL, 0, NULL}
};

static PyTypeObject SillyNumber_Type = {
    PyObject_HEAD_INIT(NULL)
    0,                          /* ob_size */
    "silly.SillyNumber",        /* tp_name */
    sizeof(SillyNumber_Object), /* tp_basicsize */
    0,                          /* tp_itemsize */
    0,                          /* tp_dealloc */
    0,                          /* tp_print */
    0,                          /* tp_getattr */
    0,                          /* tp_setattr */
    0,                          /* tp_compare */
    0,                          /* tp_repr */
    &SillyNumber_as_number,     /* tp_as_number */
    0,                          /* tp_as_sequence */
    0,                          /* tp_as_mapping */
    0,                          /* tp_hash */
    0,                          /* tp_call */
    0,                          /* tp_str */
    0,                          /* tp_getattro */
    0,                          /* tp_setattro */
    0,                          /* tp_as_buffer */
    Py_TPFLAGS_DEFAULT |        /* tp_flags */
    Py_TPFLAGS_CHECKTYPES |     /* PyNumberMethods do their own
coercion */
    Py_TPFLAGS_BASETYPE,        /* SillyNumber_Type allows subclassing
*/
    "Silly float numbers",      /* tp_doc */
    0,                          /* tp_traverse */
    0,                          /* tp_clear */
    0,                          /* tp_richcompare */
    0,                          /* tp_weaklistoffset */
    0,                          /* tp_iter */
    0,                          /* tp_iternext */
    SillyNumber_methods,        /* tp_methods */
    0,                          /* tp_members */
    0,                          /* tp_getset */
    0,                          /* tp_base */
    0,                          /* tp_dict */
    0,                          /* tp_descr_get */
    0,                          /* tp_descr_set */
    0,                          /* tp_dictoffset */
    0,                          /* tp_init */
    0,                          /* tp_alloc */
    SillyNumber_new,            /* tp_new */
    0,                          /* tp_free */
};

static PyMethodDef silly_methods[] = {
    {NULL, NULL, 0, NULL}
};

PyMODINIT_FUNC
initsilly(void)
{
    PyObject *module;

    module = Py_InitModule3("silly", silly_methods,
                            "silly floating number type");
    if (module == NULL)
        return;

    if (PyType_Ready(&SillyNumber_Type) < 0)
        return;

    Py_INCREF(&SillyNumber_Type);
    PyModule_AddObject(module, "SillyNumber", (PyObject *)
&SillyNumber_Type);
}

/* end of silly module */


Results from the interactive session:

>>> import silly
>>> print silly.SillyNumber.__add__.__doc__
Add two SillyNumbers.
>>> print silly.SillyNumber.__radd__.__doc__
Same as __add__.
>>> n1 = silly.SillyNumber(3)
>>> n2 = silly.SillyNumber(3.14)
>>> type(n1 + n2) is silly.SillyNumber
True

HTH,
Ziga



From laurent.pointal at wanadoo.fr  Sat Mar 10 09:29:26 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 10 Mar 2007 15:29:26 +0100
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
Message-ID: <45f2bfbd$0$5094$ba4acef3@news.orange.fr>

jupiter wrote:

> Hi guys!!!
> 
> 
> Just one quick question... Which database module should I use when I
> want to use multi threading as my application requires lots of data
> from internet ???? I also want this database module to be fast, simple
> n efficient, in any case multi threading capabilities are # 1
> requirement.
> 
> 
> Thanx Guys
> 
> Anil

See the threadsafety flag of Python DB-API V2 compliant database modules.
0 = no thread safe
1 = threads may share module
2 = + may share connections
3 = + may share cursors

A+

Laurent.



From andre.ditador9999 at gmail.com  Sun Mar  4 13:00:41 2007
From: andre.ditador9999 at gmail.com (andre.ditador9999 at gmail.com)
Date: 4 Mar 2007 10:00:41 -0800
Subject: Randomizing in Python
In-Reply-To: <pan.2007.03.03.16.56.07.572522@freelance-developer.com>
References: <1172940368.958826.273260@j27g2000cwj.googlegroups.com>
	<pan.2007.03.03.16.56.07.572522@freelance-developer.com>
Message-ID: <1173031241.661923.4200@p10g2000cwp.googlegroups.com>

On Mar 3, 1:56 pm, Mark Nenadov <m... at freelance-developer.com> wrote:
> On Sat, 03 Mar 2007 08:46:09 -0800, andre.ditador9... at gmail.com wrote:
> >      I want to randomize a certain calculation in Python but haven't
> > figured it out yet. To explain what i mean, I' m going to use an
> > example:
> >                         I want to get the numbers to do a random
> > experience database for a game. What would be necessary to do so?
>
> Look into the random module (http://docs.python.org/lib/module-random.html)
>
> random.choice selects a random item out of a sequence
> random.shuffle shuffles a sequence randomly
> random.random gives a random floating point number
>
> --
> Mark Nenadov -> skype: marknenadov, web:http://www.marknenadov.com
> -> "Relying on the government to protect your privacy is like asking a
> peeping tom to install your window blinds." -- John Perry Barlow

Thanks a lot for the help!!!!



From pyapplico at gmail.com  Sun Mar 25 01:39:47 2007
From: pyapplico at gmail.com (pyapplico at gmail.com)
Date: 24 Mar 2007 22:39:47 -0700
Subject: Using remote source code
In-Reply-To: <1hvi1i4.11qqgaq109btn3N%aleax@mac.com>
References: <1174795795.112606.21720@e65g2000hsc.googlegroups.com>
	<1hvi1i4.11qqgaq109btn3N%aleax@mac.com>
Message-ID: <1174801187.128393.238840@o5g2000hsb.googlegroups.com>

On Mar 25, 3:20 pm, a... at mac.com (Alex Martelli) wrote:
> <pyappl... at gmail.com> wrote:
> > Is there any possible way that I can place a .py file on the internet,
> > and use that source code in an .py file on my computer?
>
> You can write an import hook in any way you like; see
> <http://www.python.org/dev/peps/pep-0302/> .
>
> Here's a trivial example (bereft of much error checking, etc).  I've
> uploaded tohttp://www.aleax.it/foo.pya toy module w/contents:
>
> def foo(): return 'foo'
>
> Here's a tiny program to import said module from my site:
>
> import urllib2, sys, new
>
> theurl = 'http://www.aleax.it/'
>
> class Examp(object):
>     names = set([ 'foo', ])
>     def find_module(self, fullname, path=None):
>         if fullname not in self.names: return None
>         self.foo = urllib2.urlopen(theurl+fullname+'.py')
>         return self
>     def load_module(self, fullname):
>         module = sys.modules.setdefault(fullname,
>                                           new.module(fullname))
>         module.__file__ = fullname
>         module.__loader__ = self
>         exec self.foo.read() in module.__dict__
>         return module
>
> def hooker(pathitem):
>     print 'hooker %r' % pathitem
>     if pathitem.startswith(theurl): return Examp()
>     raise ImportError
>
> sys.path_hooks.append(hooker)
> sys.path.append(theurl)
>
> import foo
> print foo.foo()
>
> Alex

Thanks for your help, now I can continue building my source code
generator. :)



From aleax at mac.com  Thu Mar 15 01:56:46 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 14 Mar 2007 22:56:46 -0700
Subject: performance question
References: <mP4Kh.6945$yW.6277@newssvr11.news.prodigy.net>
Message-ID: <1huzm0z.10016t21kr0wo0N%aleax@mac.com>

Eric Texier <texiereric at yahoo.com> wrote:

> I need speed here. What will be the fastest method or does it matter?
> 
> (for the example 'a' is only 3 values for the clarity of the example)
> a = [1,3,4.] ##
> 
> 
> method1:
> 
> f.write("vec %f %f %f \n" % (a[0],a[1],a[2]))
> 
> method2:
> 
> f.write("vec " + str(a[0]) + " " + str(a[1]) + " " + str(a[2]) + "\n")
> 
> also it there a relevant speed difference between making few small write
> instead of 1 bigger one.

Learn to use the timeit module from the standard library, particularly
via the handy -mtimeit commandline switch, and you can measure
performance issues for yourself.  E.g., on my laptop:

brain:~ alex$ python -mtimeit -s"a=[1,3,4];f=open('/dev/null','w')"
'f.write("vec %f %f %f \n" % (a[0],a[1],a[2]))'
100000 loops, best of 3: 5.64 usec per loop

brain:~ alex$ python -mtimeit -s"a=[1,3,4];f=open('/dev/null','w')"
'f.write("vec " + str(a[0]) + " " + str(a[1]) + " " + str(a[2]) + "\n")'
100000 loops, best of 3: 3.36 usec per loop

So, the ugly "method 2" is about 2.3 microseconds faster than the nicer
"method 1" -- when the items of a are ints which method 1 widens to
floats while method 2 doesn't (the results are different between the
methods).  When they're floats to start with...:

brain:~ alex$ python -mtimeit -s"a=[1.,3.,4.];f=open('/dev/null','w')"
'f.write("vec %f %f %f \n" % (a[0],a[1],a[2]))'
100000 loops, best of 3: 5.45 usec per loop

brain:~ alex$ python -mtimeit -s"a=[1.,3.,4.];f=open('/dev/null','w')"
'f.write("vec " + str(a[0]) + " " + str(a[1]) + " " + str(a[2]) + "\n")'
100000 loops, best of 3: 6.26 usec per loop

then method 1 accelerates a little bit and method 2 slows down a lot, so
method 1 is actually about 0.8 microseconds faster.

Make sure you do your measurements with data that well represents your
actual application needs, and -mtimeit will serve you well (if you don't
care about that microsecond or two either way, which is often the case,
then choose the nicer metod 1, of course:-).


Alex


From jimburton1 at gmail.com  Thu Mar 22 06:04:00 2007
From: jimburton1 at gmail.com (Jim Burton)
Date: 22 Mar 2007 03:04:00 -0700
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
Message-ID: <1174557840.338374.25990@d57g2000hsg.googlegroups.com>

On 21 Mar, 19:11, Lew <l... at nospam.lewscanon.com> wrote:
> Dr. Who wrote:
> > Don't Feed The Trolls :-)
>
> But, but - you fed me!?
>
[blah]
>
> We could put up a contest - whoever finds and corrects the most errors in the
> post wins. Ties broken by the quality of the correct explanations. Incorrect
> explanations count against the entry.
>
> -- Lew

Or you could stop feeding the trolls.



From arnodel at googlemail.com  Thu Mar  1 13:03:34 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 1 Mar 2007 10:03:34 -0800
Subject: class declaration shortcut
In-Reply-To: <YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<1172748388.475530.57570@k78g2000cwa.googlegroups.com>
	<YJudnezV_r1DZXvYnZ2dnUVZ_hGdnZ2d@comcast.com>
Message-ID: <1172772214.569734.95990@n33g2000cwc.googlegroups.com>

On Mar 1, 4:01 pm, Steven Bethard <steven.beth... at gmail.com> wrote:
> Arnaud Delobelle wrote:
[...]
> This does pretty much the same thing as the recipe I posted:

Not at all.  My new_struct create returns a new class which is similar
to a C struct (notice the __slots__).  The recipe you refer to is
nothing more a class which can be initialised with some attributes. It
does not address the OP's question at all.

>      http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/502237
>
> Note that your approach requires repetition of the 'Person' and quotes
> around each attribute name, which the OP complained about. The recipe at
> least gets rid of the repetition of 'Person'.

The 'name' argument is not necessary.  It is just here to give a user-
friendly name to the newly created class.
One could just as well write the new_struct function so that

>>> Person = new_struct('name', 'tel', ...)

Of course it would be impossible for the function written as above to
name the class in a user-meaningful way.  The recipe you refer to does
not face this problem because it is not a method to quickly create a
new class, it is merely a class whose __init__ method allows you to
initialise some attribute at instance-creation time.

As for the quotes around the attribute names, well... Let's say that
if it was possible to do without, I don't think I would be using
python...

--
Arnaud



From aleax at mac.com  Thu Mar 15 01:21:13 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 14 Mar 2007 22:21:13 -0700
Subject: Returning other instance from __init__
References: <1173933158.948806@jubilee.claranet.pt>
Message-ID: <1huzkla.i6dshw1grnysmN%aleax@mac.com>

Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:

> I would like to implement something like this:
> 
> class C1:
>       def __init__(self,xxx):
>               if ... :
>                       self.foo = foo
>                       self.bar = bar
>               else:
>                       self=C1.load(xxx)
> 
>       def load(xxx):
>               ...
>               return instance_of_C1
>       load=staticmethod(load)
> 
> This does not seem correct. How can I do it?

Use __new__ for such purposes, not __init__.  (You need to make C1
newstyle, e.g. inherit from object, to make special method __new__
work).

>From __new__ you can return whatever you wish.  However, if you return
an instance of C1, it _will_ be passed to __init__; so, just make sure
__init__ doesn't redo the initialization if passed an
already-initialized self.

E.g.:

class C1(object):
    def __new__(cls, xxx):
        if xxx: return type.__new__(cls, xxx)
        else: return C1.load(xxx)
    @staticmethod
     def load(xxx): return ...whatever...
     def __init__(self, xxx):
         if hasattr(self, 'foo'): return
         self.foo = 'foo'
         self.bar = 'bar'


Alex


From robert.kern at gmail.com  Sat Mar 10 18:07:12 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 10 Mar 2007 17:07:12 -0600
Subject: distributed queue?
In-Reply-To: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
Message-ID: <esvdn3$o7e$1@sea.gmane.org>

Paul Rubin wrote:
> Does anyone have an implementation of a distributed queue?  I.e. I
> have a long running computation f(x) and I'd like to be able to
> evaluate it (for different values of x) on a bunch of different
> computers simultaneously, the usual "worker thread" pattern except
> distributed across a network.  I guess this is pretty easy to write
> with a centralized socket listener that dispatches requests through a
> Queue to multiple threads on the same machine, each talking
> synchronously to a server socket.  I wonder if something like it
> already exists.  I see a little bit of discussion in the newsgroup
> archive but no obvious pointers to code.

Take a look at the work being done on IPython:

  http://ipython.scipy.org/moin/Parallel_Computing

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From http  Fri Mar 16 01:59:52 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 21:59:52 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
Message-ID: <7x6491k9t3.fsf@ruckus.brouhaha.com>

"n00m" <n00m at narod.ru> writes:
> h = collections.defaultdict(itertools.repeat(0).next)

Something wrong with 
   h = collections.defaultdict(int)
?????

> for x in e:
>   for y in r:
>     sch += h[-(x + y)]

That scares me a little: I think it makes a new entry in h, for the
cases where -(x+y) is not already in h.  You want:

     for x in e:
       for y in r:
        sch += h.get(-(x+y), 0)


From jstroud at mbi.ucla.edu  Sun Mar 25 08:06:36 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 25 Mar 2007 12:06:36 GMT
Subject: Tkinter Toplevel geometry
In-Reply-To: <hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
	<0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>
	<hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>
Message-ID: <gBtNh.9166$JZ3.7966@newssvr13.news.prodigy.net>

James Stroud wrote:
> James Stroud wrote:
>> Chris wrote:
>>> Hi,
>>>
>>> If a user resizes a Toplevel window, or I set a Toplevel's geometry
>>> using the geometry() method*, is there any way to have the geometry
>>> reset to that required for all the widgets?
>>>
>>> I think I found what I'm looking for in tk itself:
>>> """
>>> 13.3. How can I clear the geometry settings for a toplevel?
>>> If you want to have Tk resize your toplevel to what the toplevel
>>> requires (ie: the user might have resized it, or a widget was
>>> removed), use [wm geometry $toplevel].
>>> """
>>> [from http://tcl.sourceforge.net/faqs/tk/]
>>>
>>>
>>>
>>> * for instance, if I want to turn of Tkinter's automatic adjustment of
>>> the window to fit all the widgets by doing something like
>>> self.geometry(self.geometry()), is there any way to undo that?
>>>
>>> Thanks,
>>> Chris
>>>
>>
>> Hi Chris,
>>
>> I think you are on to something. The equivalent of
>>
>>    [wm geometry $toplevel]
>>
>> in Tkinter would be
>>
>>    sometop.geometry()
>>
>> Or, equivalently,
>>
>>    sometop.wm_geometry()
>>
>> Or, calling the underlying tcl/tk interpreter directly
>>
>>    sometop.tk.call('wm', 'geometry', str(sometop))
>>
>> Which is redundant, but emphasizes the point: This does not resize the
>> widget as expected nor does it cause the window to resize upon adding 
>> new packing slaves--at least for the X11 based Tkinter for mac via the 
>> fink debian based package manager.
>>
>> Really wish things worked according to the docs a lot of the time or 
>> that they weren't so poorly written. Perhaps they are implying that 
>> you must pass parameters, however they do not explain how one might 
>> generate said parameters to get the required size to which they 
>> allude. Terribly disappointing.
>>
>> James
> 
> After playing with this an inordinate amount of time, I found that one 
> does need to supply parameters, namely the null parameter of an empty 
> string. Try:
> 
>   sometop.geometry('')
> 
> This repacks according to the widgets. Not quite clear from the 
> miserable docs, is it?
> 
> James

Now for the advanced question, how might one bind that to the 
resize/maximize button of the window decorations? I'm guessing with 
protocol, but its way past my bedtime.

James


From mahs at telcopartners.com  Sun Mar 11 18:58:07 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Sun, 11 Mar 2007 15:58:07 -0700
Subject: Signed zeros: is this a bug?
In-Reply-To: <op.to1imes5x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<op.to1imes5x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <et21i2$iup$1@sea.gmane.org>

Gabriel Genellina wrote:

> 
> (I cannot find peephole.c on the source distribution for Python 2.5, but  
> you menctioned it on a previous message, and the comment above refers to  
> the peephole optimizer... where is it?)
> 

The peephole optimizer is in compile.c - the entry point is optimize_code

BTW, I have written a pure-Python compiler which aims to be functionally 
identical to the Python 2.5 compiler, and is in fact very similar (much closer 
than stdlib.compiler).  It may be helpful in investigating alternative 
workarounds for the -0.0 issue.

http://svn.brownspencer.com/pycompiler/branches/new_ast/

Michael



From mcPas.De.Spam at mclaveauPas.De.Spam.com  Sat Mar 10 14:27:10 2007
From: mcPas.De.Spam at mclaveauPas.De.Spam.com (Michel Claveau)
Date: Sat, 10 Mar 2007 20:27:10 +0100
Subject: minimum age to learn python (a.k.a graphical vs text languages)
References: <mailman.4905.1173540820.32031.python-list@python.org>
Message-ID: <mn.54cb7d73ca1a07fe.34209@mclaveauPas.De.Spam.com>

Hi!

Personally, I was yet in the belly of my mom, whom I already thought in 
Python?







-- 
@-salutations

Michel Claveau




From j23212 at hotmail.com  Sun Mar 18 17:55:47 2007
From: j23212 at hotmail.com (Jon Van DeVries)
Date: Sun, 18 Mar 2007 11:55:47 -1000
Subject: python QT or python-GTK
Message-ID: <45fdb561$0$17201$4c368faf@roadrunner.com>

** All the posts found in google are old.  I'm assuming new improvements have been made to both IDEs. **

Please correct me if I'm wrong, I'm a newbie.

1. Which one of them requires fewer lines to accomplish the same thing?
from what I understand QT it's just like Borland J-Builder. Meaning, you want a button, you draw it, then you double-click on it, a window opens up and you type events and behavior.
And with GTK, you just type everything.

2. Which one is cross platform? (Linux, MacOS, Windows,etc).

3. Which one has more widgets?

4. Which one is the easiest to pick up?  I tried perl-QT and oh boy that mother is cryptic.

5. Which one has a bigger support community?

6. or if you think both pythonQT and PythonGTK are junk please suggest the one you like/use? I work on a Linux platform with Python 2.4.

Thanks guys, I appreciate  your help.


--------------=  Posted using GrabIt  =----------------
------=  Binary Usenet downloading made easy =---------
-=  Get GrabIt for free from http://www.shemes.com/  =-



From http  Thu Mar  8 20:53:57 2007
From: http (Paul Rubin)
Date: 08 Mar 2007 17:53:57 -0800
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>
	<7xbqj3i7zk.fsf@ruckus.brouhaha.com>
	<pan.2007.03.09.01.47.53.45675@REMOVEME.cybersource.com.au>
Message-ID: <7xodn3p4ga.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> Are you saying it only works as advertised within the except clause of a
> try...except block?

I think that's the idea.  It hadn't occurred to me that it could be
used any other way, but I don't have the docs in front of me right
now, so maybe I missed something.


From bjourne at gmail.com  Tue Mar  6 10:14:28 2007
From: bjourne at gmail.com (=?ISO-8859-1?Q?BJ=F6rn_Lindqvist?=)
Date: Tue, 6 Mar 2007 16:14:28 +0100
Subject: Interface Implementation in Python
In-Reply-To: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
Message-ID: <740c3aec0703060714n6720dae9v42794f54bfdbd665@mail.gmail.com>

On 5 Mar 2007 16:25:03 -0800, p_shakil at yahoo.com <p_shakil at yahoo.com> wrote:
> Hi,
>
>  I would like to know the interface concept in Python.How the
> Interface is defined and implemented in Python?.
>
> How to access the interface fromn Client?

You have a class with methods and data. You write many unit tests for
that class which defines the behaviour of your interface. Make sure
your class passes all those tests. When you are done, not only does
your unit tests specify an interface, you also have a concrete class
that implements that interface.

Now replace the original class with another class. If that class also
passes all your tests, then you can conclude that it also implements
the same interface.

-- 
mvh Bj?rn


From paddy3118 at googlemail.com  Thu Mar 22 01:08:00 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 21 Mar 2007 22:08:00 -0700
Subject: Wikipedia and a little piece of Python History
In-Reply-To: <7xtzwee3gw.fsf@ruckus.brouhaha.com>
References: <1174504730.728688.52380@y80g2000hsf.googlegroups.com>
	<7xtzwee3gw.fsf@ruckus.brouhaha.com>
Message-ID: <1174540080.654815.26370@n76g2000hsh.googlegroups.com>

On Mar 21, 8:39 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Paddy" <paddy3... at googlemail.com> writes:
> > I just had a link to Tim peters first post on doctest:
> >http://groups.google.com/group/comp.lang.python/msg/1c57cfb7b3772763
> > removed fromhttp://en.wikipedia.org/wiki/Doctestas it doesn't fit
> > their guidelines for external links.
>
> Just sit tight for a while.  It looks like someone went a bit
> overboard removing those links with a bot, and is now in the process
> of putting them back.

I could not wait, and have just reverted the page.

Thanks guys.

- Paddy.

P.S. Now all I need is the time to reorganize The Duck Typing entry -
The Explanation in the Talk section is better than the article
itself :-)



From __peter__ at web.de  Tue Mar 27 03:46:50 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 Mar 2007 09:46:50 +0200
Subject: PDB does not allow jumping to first statement?
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
	<Xns990055A772011duncanbooth@127.0.0.1>
Message-ID: <euai58$3jq$02$1@news.t-online.com>

Duncan Booth wrote:

> "Chris Lasher" <chris.lasher at gmail.com> wrote:
> 
>> I noticed that I absolutely cannot jump back to the first statement
>> (line 3, "a = 1") using the jump command. I can jump to any other line
>> BUT the first statement's using the "jump <line number>" command. I
>> experience the same behavior with Winpdb and rpdb2. Why is this?
>> 
> 
> Which version of Python, and what happens when you try it?
> 
> It works fine for me with Python 2.5 on Windows:
> 
> C:\Temp>\python25\python -m pdb t.py
>> c:\temp\t.py(3)<module>()
> -> a = 1
> (Pdb) s
>> c:\temp\t.py(4)<module>()
> -> b = 2
> (Pdb) j 3
>> c:\temp\t.py(3)<module>()
> -> a = 1
> (Pdb)

It looks like you successfully jumped to the first line, but it will be
skipped if you try to execute it:

$ cat tmp.py
print "aaa"
print "bbb"
print "ccc"
print "ddd"
$ python2.5 -m pdb tmp.py
> /home/nn/tmp.py(1)<module>()
-> print "aaa"
(Pdb) s
aaa
> /home/nn/tmp.py(2)<module>()
-> print "bbb"
(Pdb) j 1
> /home/nn/tmp.py(1)<module>()
-> print "aaa"
(Pdb) s
bbb                             <-- wrong
> /home/nn/tmp.py(3)<module>()
-> print "ccc"
(Pdb) s
ccc
> /home/nn/tmp.py(4)<module>()
-> print "ddd"
(Pdb) j 2
> /home/nn/tmp.py(2)<module>()
-> print "bbb"
(Pdb) s
bbb                             <-- correct
> /home/nn/tmp.py(3)<module>()
-> print "ccc"

Peter


From samuel.kortas at gmail.com  Mon Mar 26 07:40:32 2007
From: samuel.kortas at gmail.com (Samkos)
Date: 26 Mar 2007 04:40:32 -0700
Subject: the second of nested buttons using textvariable remains void!
In-Reply-To: <mailman.5433.1174527676.32031.python-list@python.org>
References: <1174522287.135371.26220@o5g2000hsb.googlegroups.com>
	<mailman.5433.1174527676.32031.python-list@python.org>
Message-ID: <1174909232.938710.70670@l77g2000hsb.googlegroups.com>

Thanks a lot Jim and James

now it works fine!

Sam



From roopesh.raj at gmail.com  Mon Mar  5 04:23:58 2007
From: roopesh.raj at gmail.com (Roopesh)
Date: 5 Mar 2007 01:23:58 -0800
Subject: Mod python - mysql lock
Message-ID: <1173086638.769972.254300@t69g2000cwt.googlegroups.com>

Hi,
In my mod_python project I am using mysql as the database. There is
table card in which unique cards are stored. When a user request comes
he has to get a unique card. In this situation I want to use LOCK with
which I can prevent other users accessing the table. I tried excuting
"LOCK" command of mysql through python code, but it is not locking the
database. Any ideas why this isn't working and how can I do the same.

//python code
sql = "LOCK TABLES card WRITE"
cursor.execute(sql)


Regards
Roopesh



From adaworks at sbcglobal.net  Mon Mar 19 02:22:15 2007
From: adaworks at sbcglobal.net (adaworks at sbcglobal.net)
Date: Mon, 19 Mar 2007 06:22:15 GMT
Subject: Choosing Python
References: <PsmLh.8409$yW.3649@newssvr11.news.prodigy.net>
	<q7oLh.11380$PL.6562@newsread4.news.pas.earthlink.net>
Message-ID: <r_pLh.10975$jx3.5577@newssvr25.news.prodigy.net>


"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message 
news:q7oLh.11380$PL.6562 at newsread4.news.pas.earthlink.net...
> On Mon, 19 Mar 2007 02:21:35 GMT, <adaworks at sbcglobal.net> declaimed the
> following in comp.lang.python:
>
>> or Ada.   Java could vanish tomorrow and, with Python
>> and Ruby available, no one would miss Java at all.  As for
>
> Except for all those software firms that have based their entire
> production on Java <G> {Most of which, based on a limited example of
> tools at work, tend to be klutzy, idiosyncratic, slow... and for some,
> new versions are incompatible with projects created with older ones}
> -- 
Dennis,

The same can be said for those who have chosen other languages
and used them in non-standard ways.   COBOL comes to mind.

One of the many things I like about Ada is that it is the same wherever
you use it.   Python seems to be that way too.   Java started out that way.
It was the intention for Java to be more portable than it is.   I have heard
that Java was released before the developers were finished designing it.
That would account for some of the upheaval in the language.   I do know
of one set of software systems that has simply stopped working after the
initial release of Java was revised.  The appliation was versioned it out
of compliance.

The hype surrounding Java, and the overly optimistic expectations of
C++ are a small sample of good intentions gone awry.   The same thing
could happen to Python or Ruby if those who control it are not careful.

Both languages, in my view, could benefit from a model of pre-, post-,
and invariant assertions, but done badly, that could do more harm than
good.  So let's hope that Python and Ruby evolve better than C++.  For
C++, every new version seems designed to compensate for something
that was wrong with some earlier version.

Richard 




From rzantow at gmail.com  Sat Mar  3 14:34:36 2007
From: rzantow at gmail.com (rzed)
Date: Sat, 03 Mar 2007 14:34:36 -0500
Subject: print a ... z, A ... Z, "\n"' in Python
References: <mailman.4623.1172909667.32031.python-list@python.org>
	<1hue4db.1ifwnsjmhm2pN%aleax@mac.com>
Message-ID: <Xns98E8944929193rzantowgmailcom@208.49.80.253>

aleax at mac.com (Alex Martelli) wrote in
news:1hue4db.1ifwnsjmhm2pN%aleax at mac.com: 

> js  <ebgssth at gmail.com> wrote:
> 
>> HI guys,
>> 
>> How do you write Perl's
>> 
>>     print a ... z, A ... Z,  "\n"' in Python
>> 
>> In Python?
> 
> This specific one is easy, though this doesn't generalize:
> 
> import string
> print string.lowercase + string.uppercase
> 
> For the general case, there's no way to avoid calling chr and
> ord, because a string in Python doesn't have a "natural
> successor". So the only issue is how you prefer to hide those
> calls &c (in some class or function) and you already received
> suggestions on that. 
> 

No ord or chr in sight:

# Inclusive character range. 
def pycrange(lo,hi):
    import string
    chars = string.letters + " "
    rstr = ''
    lp = chars.find(lo)
    hp = chars.find(hi)
    if lp < hp:    
        rstr = chars[lp:hp+1]
    return rstr

print pycrange('c','n')


Lame code, though.

-- 
rzed


From jon+usenet at unequivocal.co.uk  Sun Mar 11 08:19:51 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 11 Mar 2007 12:19:51 GMT
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
	<2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>
	<slrnev6nob.oj9.jon+usenet@snowy.squish.net>
	<mailman.4930.1173605398.32031.python-list@python.org>
	<slrnev7o0j.ejv.jon+usenet@snowy.squish.net>
	<mailman.4936.1173614117.32031.python-list@python.org>
Message-ID: <slrnev7sv6.837.jon+usenet@snowy.squish.net>

In article <mailman.4936.1173614117.32031.python-list at python.org>, Gabriel Genellina wrote:
>>>> I don't know, but stock Python 2.5 seems to stick mysterious '.egg'
>>>> files in the site-packages directory when you install things.
>>>
>>> Which "stock" Python? Not the one from www.python.org...
>>
>> Yes, the one from www.python.org.
> 
> Those .egg must come from other installed packages...

My mistake, they are ".egg-info". And they certainly do come from
stock Python 2.5 from www.python.org and not anything else. They
are installed by distutils/command/install_egg_info, which is
automatically called by 'python setup.py install'.


From kyosohma at gmail.com  Tue Mar 20 14:05:25 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 11:05:25 -0700
Subject: Exceptions when closing a file
In-Reply-To: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
References: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
Message-ID: <1174413925.474168.152570@p15g2000hsd.googlegroups.com>

On Mar 20, 12:25 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> Closing a file can (I believe) raise an exception. Is that documented
> anywhere? I've spent a lot of frustrating time trying to track this down,
> with no luck, which suggests that either my google-foo is weak or that it
> isn't documented. Is IOError the only exception it can raise?
>
> The only thing I have found is this:
>
> http://mail.python.org/pipermail/python-bugs-list/2004-November/02603...
>
> Out of curiosity, is there a simple way to demonstrate close() raising an
> exception that doesn't involve messing about with disk quotas?
>
> --
> Steven.

I've never had any problems closing a file. Maybe you need to flush it
before you close it? Are you running threads that access the file in
ad hoc fashion or something else out of the ordinary? Is this some
sort of long running process writing a large file?

Mike



From supercooper at gmail.com  Thu Mar 29 09:35:13 2007
From: supercooper at gmail.com (supercooper)
Date: 29 Mar 2007 06:35:13 -0700
Subject: urllib timeout issues
In-Reply-To: <mailman.5686.1175032236.32031.python-list@python.org>
References: <1175023315.536080.276550@n76g2000hsh.googlegroups.com>
	<mailman.5681.1175026431.32031.python-list@python.org>
	<1175028104.429759.165920@n76g2000hsh.googlegroups.com>
	<mailman.5686.1175032236.32031.python-list@python.org>
Message-ID: <1175175313.022931.304830@n59g2000hsh.googlegroups.com>

On Mar 27, 4:50 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 27 Mar 2007 17:41:44 -0300, supercooper <supercoo... at gmail.com>
> escribi?:
>
>
>
> > On Mar 27, 3:13 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Tue, 27 Mar 2007 16:21:55 -0300, supercooper <supercoo... at gmail.com>
> >> escribi?:
>
> >> > I am downloading images using the script below. Sometimes it will go
> >> > for 10 mins, sometimes 2 hours before timing out with the following
> >> > error:
>
> >> >     urllib.urlretrieve(fullurl, localfile)
> >> > IOError: [Errno socket error] (10060, 'Operation timed out')
>
> >> > I have searched this forum extensively and tried to avoid timing out,
> >> > but to no avail. Anyone have any ideas as to why I keep getting a
> >> > timeout? I thought setting the socket timeout did it, but it didnt.
>
> >> You should do the opposite: timing out *early* -not waiting 2 hours- and
> >> handling the error (maybe using a queue to hold pending requests)
>
> >> --
> >> Gabriel Genellina
>
> > Gabriel, thanks for the input. So are you saying there is no way to
> > realistically *prevent* the timeout from occurring in the first
>
> Exactly. The error is out of your control: maybe the server is down,
> irresponsive, overloaded, a proxy has any problems, any network problem,
> etc.
>
> > place?  And by timing out early, do you mean to set the timeout for x
> > seconds and if and when the timeout occurs, handle the error and start
> > the process again somehow on the pending requests?  Thanks.
>
> Exactly!
> Another option: Python is cool, but there is no need to reinvent the
> wheel. Use wget instead :)
>
> --
> Gabriel Genellina

Gabriel...thanks for the tip on wget...its awesome! I even built it on
my mac. It is working like a champ for hours on end...

Thanks!

chad




import os, shutil, string

images = [['34095d2','Nashoba'],
['34096c8','Nebo'],
['36095a4','Neodesha'],
['33095h7','New Oberlin'],
['35096f3','Newby'],
['35094e5','Nicut'],
['34096g2','Non'],
['35096h6','North Village'],
['35095g3','Northeast Muskogee'],
['35095g4','Northwest Muskogee'],
['35096f2','Nuyaka'],
['34094e6','Octavia'],
['36096a5','Oilton'],
['35096d3','Okemah'],
['35096c3','Okemah SE'],
['35096e2','Okfuskee'],
['35096e1','Okmulgee Lake'],
['35095f7','Okmulgee NE'],
['35095f8','Okmulgee North'],
['35095e8','Okmulgee South'],
['35095e4','Oktaha'],
['34094b7','Old Glory Mountain'],
['36096a4','Olive'],
['34096d3','Olney'],
['36095a6','Oneta'],
['34097a2','Overbrook']]

wgetDir = 'C:/Program Files/wget/o'
exts = ['tif', 'tfw']
url = 'http://www.archive.org/download/'
home = '//fayfiler/seecoapps/Geology/GEOREFRENCED IMAGES/TOPO/Oklahoma
UTMz14meters NAD27/'

for image in images:
    for ext in exts:
        fullurl = url + 'usgs_drg_ok_' + image[0][:5] + '_' + image[0]
[5:] + '/o' + image[0] + '.' + ext
        os.system('wget %s -t 10 -a log.log' % fullurl)
        shutil.move(wgetDir + image[0] + '.' + ext, home + 'o' +
image[0] + '_' + string.replace(image[1], ' ', '_') + '.' + ext)



From jeba_ride at yahoo.com  Fri Mar 16 07:41:57 2007
From: jeba_ride at yahoo.com (Clement)
Date: Fri, 16 Mar 2007 04:41:57 -0700 (PDT)
Subject: Sharing Objects in Python
Message-ID: <701552.85861.qm@web37215.mail.mud.yahoo.com>

Can a object sharable by two different python programs... If so can you please explain... because my project needs two programs to access nearly 45GB file Symentaniously...


By
  Clement Jeba kumar,
  Tenkasi.

 
---------------------------------
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From skip at pobox.com  Tue Mar 27 10:48:59 2007
From: skip at pobox.com (skip at pobox.com)
Date: Tue, 27 Mar 2007 09:48:59 -0500
Subject: socket read timeout
In-Reply-To: <eub6un$k3d$3@nemesis.news.tpi.pl>
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
Message-ID: <17929.11995.871552.920761@montanaro.dyndns.org>


    >> I am looking for the most efficient / cleanest way to implement a
    >> socket read with timeout (Windows mainly but would be great if the
    >> same code worked under *nix)

    Jarek> Did you see http://www.timo-tasi.org/python/timeoutsocket.py ?

Also socket objects have timeout attributes now.

Skip



From raacampbell at gmail.com  Sun Mar 18 15:58:48 2007
From: raacampbell at gmail.com (raacampbell at gmail.com)
Date: 18 Mar 2007 12:58:48 -0700
Subject: Stuck with pyqt: can't get/read button IDs from a qbuttongroup
Message-ID: <1174247928.718201.239610@n76g2000hsh.googlegroups.com>

Hi,

I'm learning Python and QT and have set myself the task of writing a
simple calculator applet. I'm using Qt3 and with the designer have
made a button group which contains 10 buttons to allow the user to
press the digits 0 to 9.

The idea is that the button group is associated with a single slot.
When I click a button the qbuttongroup sends a signal to a slot I've
named getNumber. At the moment I just want this to read buttonGroupid
of the clciked button and write this to the screen (the buttonGroupid
is equal to the value the user wishes to select). So if the user
clicks on, say, button "7" then this digit will be printed to the
listbox. Problem is that I can't work out how to read this ID. I can't
believe it's this hard--I have RTFM, some programing experience, and
have searched google for 3 days. No joy.

The best I've managed so far is this line from the .ui.h file
void calc::getNumber(int id)
{
self.listBox1.insertItem(str(id))
}

which translates to this in the .py:
    def getNumber(self,a0):
        self.listBox1.insertItem(str(id))


All that does is is print the text "<built-in function id>" to my list
box.

What am I missing?

Thanks!



From swiftset at gmail.com  Thu Mar 22 02:41:25 2007
From: swiftset at gmail.com (swiftset)
Date: 21 Mar 2007 23:41:25 -0700
Subject: interpreting glyph outlines from ttfquery?
Message-ID: <1174545685.277420.26890@e1g2000hsg.googlegroups.com>

I'm try to convert a glyph into a format I can easily numerically
manipulate. So far I've figured out how to use ttfquery to get a list
that represents the outline of a contour in a glyph:

from ttfquery import describe, glyphquery, glyph
f = describe.openFont("/usr/share/fonts/truetype/freefont/
FreeSans.ttf")
n = glyphquery.glyphName(f, 'D')
g = glyph.Glyph(n)
c = g.calculateContours(f)
o = glyph.decomposeOutline(c[1])

o looks like:

[array([182,  82],'s'),
(354, 82),
(420.22222222222229, 90.000000000000014),
(474.88888888888891, 114.0), ...,
array([182,  82],'s'),
array([182,  82],'s')]

Is this a polyline?

Thanks,
Alex



From martinunsal at gmail.com  Sun Mar  4 19:21:39 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 4 Mar 2007 16:21:39 -0800
Subject: Project organization and import
Message-ID: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>

I'm using Python for what is becoming a sizeable project and I'm
already running into problems organizing code and importing packages.
I feel like the Python package system, in particular the isomorphism
between filesystem and namespace, doesn't seem very well suited for
big projects. However, I might not really understand the Pythonic way.
I'm not sure if I have a specific question here, just a general plea
for advice.

1) Namespace. Python wants my namespace heirarchy to match my
filesystem heirarchy. I find that a well organized filesystem
heirarchy for a nontrivial project will be totally unwieldy as a
namespace. I'm either forced to use long namespace prefixes, or I'm
forced to use "from foo import *" and __all__, which has its own set
of problems.

1a) Module/class collision. I like to use the primary class in a file
as the name of the file. However this can lead to namespace collisions
between the module name and the class name. Also it means that I'm
going to be stuck with the odious and wasteful syntax foo.foo
everywhere, or forced to use "from foo import *".

1b) The Pythonic way seems to be to put more stuff in one file, but I
believe this is categorically the wrong thing to do in large projects.
The moment you have more than one developer along with a revision
control system, you're going to want files to contain the smallest
practical functional blocks. I feel pretty confident saying that "put
more stuff in one file" is the wrong answer, even if it is the
Pythonic answer.

2) Importing and reloading. I want to be able to reload changes
without exiting the interpreter. This pretty much excludes "from foo
import *", unless you resort to this sort of hack:

http://www.python.org/search/hypermail/python-1993/0448.html

Has anyone found a systematic way to solve the problem of reloading in
an interactive interpreter when using "from foo import *"?


I appreciate any advice I can get from the community.

Martin



From john.pye at gmail.com  Wed Mar 14 06:57:43 2007
From: john.pye at gmail.com (John Pye)
Date: 14 Mar 2007 03:57:43 -0700
Subject: Passing a FILE* from Python into a MinGW/SWIG module
Message-ID: <1173869863.712750.239070@d57g2000hsg.googlegroups.com>

Hi all

I understand that I can't hope to pass a FILE* from the Windows
version of Python into a SWIG module that I've built using MinGW gcc/g+
+, because apparently the FILE* structure are different and
incompatible.

Is there an official workaround for this? Presumably I need to
implement a mingw-compatible version of all the 'file' class in
Python, eg

import mingw
import myswigmodule

F1 = mingw.file("newfile.txt","rw")
F1.write("somestuff")
F1.seek(0)
F2 = mingw.tmpfile()
myswigmodule.dosomething(F1,F2)
F2.seek(0)
print F2.read()

Has anyone done this? Is there a better way that doesn't require users
of my module to adapt? Do I have to use the dreaded MSVS to compile my
SWIG module?

Cheers
JP



From laurent.pointal at wanadoo.fr  Sat Mar 31 10:49:39 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 31 Mar 2007 16:49:39 +0200
Subject: Remote XML Parsing
References: <1175238860.680426.134400@y80g2000hsf.googlegroups.com>
	<euifrk$fv3$1@news2.u-psud.fr>
	<1175300992.985589.172320@p77g2000hsh.googlegroups.com>
Message-ID: <460e73db$0$27377$ba4acef3@news.orange.fr>

pyapplico at gmail.com wrote:

> On Mar 30, 5:56 pm, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
>> pyappl... at gmail.com a ?crit :
>>
>> > How can I parse a remote XML file with Python?
>> > And what will I be able to do with this XML file in Python?
>>
>> > Sorry if this is a noob-ish question.
>>
>> You can process XML data with Python as long as you can get it - you
>> will be able to do what you want with it.
>>
>> How do you access your remote file ?
>>
>> ...more details would be welcome...
> 
> Well I'll be happy to access in the way your comfortable with.

Net protocols -> urllib2 module
Local files (or network mounted files) -> open function
Remote call -> xmlrpc, omniORBpy, pyrpc...


Once you get the XML data... sax/dom/elementtree & Co (see Python docs, Dive
Into Python...).




From efrat_regev at yahoo.com  Fri Mar 23 13:10:42 2007
From: efrat_regev at yahoo.com (Efrat Regev)
Date: Fri, 23 Mar 2007 19:10:42 +0200
Subject: Compiler-AST-Walk-Visitor: Any Examples or Documentation?
Message-ID: <4604085c@news.bezeqint.net>

     Hello,

     I'm trying to write something that will translate Python code to 
pseudo-code (for teaching purposes). Googling around indicated that the 
compiler module is pertinent, especially creating a visitor to walk the 
generated AST:
http://docs.python.org/lib/module-compiler.html

     I can build the AST, but I can't figure out how to write the 
visitor. The package documentation didn't help me out that much, and I 
couldn't find any examples. In fact, google only came up with this 
unanswered related question:
http://mail.python.org/pipermail/python-list/2006-July/392716.html

     Any help is appreciated.

      Thanks and Bye,

       Efrat


From alfaeco at gmail.com  Fri Mar 30 05:04:19 2007
From: alfaeco at gmail.com (alfaeco at gmail.com)
Date: 30 Mar 2007 02:04:19 -0700
Subject: Object Oriented Database with interface for Pyhton
Message-ID: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>

Hello all

I am looking for an object oriented database with interffaces for
python. Either open source or commercial.

I am looking for a Database not a object persistence system. I would
like to be able to execute queries outside from the aplication. If
posible wih OQL ( object query language )

The only candidate I have now is Cache from Intersystem

Thanks in advance



From greg at cosc.canterbury.ac.nz  Thu Mar  1 19:09:37 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Fri, 02 Mar 2007 13:09:37 +1300
Subject: finding out the precision of floats
In-Reply-To: <1172765892.645783.125420@h3g2000cwc.googlegroups.com>
References: <1172401072.607179.241290@q2g2000cwa.googlegroups.com>
	<1172402444.935723.192200@m58g2000cwm.googlegroups.com>
	<1172405198.187516.276310@h3g2000cwc.googlegroups.com>
	<1172410271.154309.49700@j27g2000cwj.googlegroups.com>
	<1172412661.998318.109180@s48g2000cws.googlegroups.com>
	<mailman.4453.1172579820.32031.python-list@python.org>
	<1172585380.631673.257410@q2g2000cwa.googlegroups.com>
	<1172602729.777210.23070@a75g2000cwd.googlegroups.com>
	<1172662682.590738.301630@k78g2000cwa.googlegroups.com>
	<1172674419.411077.4210@t69g2000cwt.googlegroups.com>
	<1172683149.885750.323640@j27g2000cwj.googlegroups.com>
	<1172698199.219016.57710@v33g2000cwv.googlegroups.com>
	<1172745203.824496.208840@h3g2000cwc.googlegroups.com>
	<1172765892.645783.125420@h3g2000cwc.googlegroups.com>
Message-ID: <54p8e9F21oh9iU1@mid.individual.net>

John Machin wrote:

> Storing 1.1 and using it in calculations may save you a few
> microseconds a day in your real-time apps.

The main advantage would be clarity of code.

> naming 1.1 as "anualRate" (sic) is utterly ludicrous.

So call it annualMultiplicationFactor or something
in the code.

--
Greg


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Mar 30 06:03:16 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 30 Mar 2007 12:03:16 +0200
Subject: Object Oriented Database with interface for Pyhton
In-Reply-To: <1175247009.786698.72390@l77g2000hsb.googlegroups.com>
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
	<1175247009.786698.72390@l77g2000hsb.googlegroups.com>
Message-ID: <460ce036$0$1390$426a74cc@news.free.fr>

csselo at gmail.com a ?crit :
(top-post corrected)
> 
> On 30 Mart, 12:04, "alfa... at gmail.com" <alfa... at gmail.com> wrote:
>> Hello all
>>
>> I am looking for an object oriented database with interffaces for
>> python. Either open source or commercial.
>>
>> I am looking for a Database not a object persistence system. I would
>> like to be able to execute queries outside from the aplication. If
>> posible wih OQL ( object query language )

 > http://www.sqlalchemy.org/
 >
 > you ll like it.

While sqlalchemy is one of the best things since sliced bread, it's 
definitevely *not* an OODB.


From gagsl-py2 at yahoo.com.ar  Fri Mar  9 08:16:19 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 10:16:19 -0300
Subject: Pb with descriptor and super ...
References: <esr95l$n12$1@ellebore.extra.cea.fr>
	<mailman.4848.1173437283.32031.python-list@python.org>
	<esrg26$p6n$1@ellebore.extra.cea.fr>
Message-ID: <op.toxa5hl0x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 09 Mar 2007 08:22:46 -0300, Erwan Adam <erwan.adam at cea.fr>  
escribi?:

> Thanks for your answer ... I followed the link
> and tried to use the "fully functional implementation of
> the super() built-in class in pure Python" given
> on this page and the result is quite surprising :

It appears that there is some disagreement on how the super object should  
behave.
If you want to know what it actually *does* now (not what it *should* do)  
you can look at typeobject.c, but it's a bit hard to read, and I don't  
understand it in full...
Maybe looking at the test suite is easier, in test_descr.py

-- 
Gabriel Genellina



From dingbat at codesmiths.com  Mon Mar 26 10:11:26 2007
From: dingbat at codesmiths.com (Andy Dingley)
Date: 26 Mar 2007 07:11:26 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1174918286.213517.100190@l77g2000hsb.googlegroups.com>

On 26 Mar, 14:20, "Noma... at gmail.com" <Noma... at gmail.com> wrote:

> what are the advantages of using Python for
> creating number crunching apps over Fortran??

If you have to ask, you've not experienced enough Fortran to know its
sheer horror.

You can write programs in Python that do usefully complicated things,
and you can get them to work in a reasonable time. Fortran can't do
this, for anything more than the trivial. "Classic" Fortran tasks of
the past are now seen as trivial. OK, so they did it to a lot of data,
but they really didn't do anything very complex to it.

You can also write Python that other people can read and maintain. You
can't do this in Fortran, without a truly insane amount of trouble. As
Fortran programs have historically been authored and hacked on by
successive generations of grad students, this is the most vital
feature of all.

Finally we're no longer so interested in "number crunching". Number
crunching used to consist of simple operations over vast arrays of
data, although this was data with remarkably simple structure by
today's standards. These just aren't the major class of problems of
interest today. There's a massive difference between old-school FEA
(bashing Newton and Hooke into tinier and tinier cells) and
bioinformatics or anything involving the representation of big data
graphs.

> Python is a tad slower than Fortran

If the Fortran program turns out to have been broken all along, then
who cares?



From BH at bh.com  Mon Mar 26 12:30:18 2007
From: BH at bh.com (BH)
Date: Mon, 26 Mar 2007 18:30:18 +0200
Subject: wx.grid problem
In-Reply-To: <1174925041.703904.151900@y80g2000hsf.googlegroups.com>
References: <4607e4f1$0$5098$ba4acef3@news.orange.fr>
	<1174925041.703904.151900@y80g2000hsf.googlegroups.com>
Message-ID: <4607f550$0$5092$ba4acef3@news.orange.fr>

Yes, absolutely, but try to minimize it, and the scrollbars stays hidden !!!


kyosohma at gmail.com a ?crit :
> On Mar 26, 10:20 am, BH <B... at bh.com> wrote:
>> Hi !
>>
>> I have a small problem with wx.Grid and scrollbars.
>> Scrollbars definitively dissapears after resizing the frame.
>>
>> Thx for help
>>
>> #----------------------------------------------------------------------
>> import wx,wx.grid
>> #----------------------------------------------------------------------
>> class MainWindow(wx.Frame):
>>       def __init__(self,parent,id,title):
>>           wx.Frame.__init__(self,parent,wx.ID_ANY,title)
>>           #--
>>           self.grid= wx.grid.Grid(id=wx.ID_ANY,parent=self)
>>           self.grid.CreateGrid(numRows=10,numCols=2)
>>           self.grid.Fit()
>>           self.Fit()
>>           #--
>>           self.Show(1)
>> #----------------------------------------------------------------------
>> app = wx.PySimpleApp()
>> frame=MainWindow(None,-1,'Grid sizer')
>> app.MainLoop()
>> del app
> 
> If I understand this correctly, that is normal. Your grid is only two
> columns by 10 rows, so if you resize your frame so that it shows all
> rows and columns, the scroll bars will disappear, much like other
> apps, such as FireFox. If you enlarge the frame enough, the scrollbars
> go away.
> 
> Mike
> 


From steve at REMOVE.THIS.cybersource.com.au  Mon Mar 19 23:41:26 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 14:41:26 +1100
Subject: any ways to judge whether an object is initilized or not in
	a	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
Message-ID: <pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>

On Mon, 19 Mar 2007 19:48:37 +1100, Ben Finney wrote:

> It's also best to inherit every class from another class, leading to a
> single hierarchy for all classes and types. 'object' is the one to
> choose if you don't want the behaviour of any other class.

What's wrong with old-style classes?

On the plus side:

- Why inherit from something if you don't need to?

- Less typing.

- Attribute-lookup is much faster, perhaps as much as twice as fast.
http://www.python.org/~jeremy/weblog/030506.html

- Documentation on old style classes is more extensive.

- You can't use new style classes for exceptions.



On the minus side:

- Properties don't work as you expect them too.

- Slots don't work at all.


In other words, the only reason why you HAVE to use a new style class is
that you need properties or __slots__. You might WANT to use a new style
class to inherit from built-in types. Otherwise, the choice between old
and new is not very important.



-- 
Steven.



From noway at ask.me  Wed Mar 21 19:55:09 2007
From: noway at ask.me (Giovanni Bajo)
Date: Thu, 22 Mar 2007 00:55:09 +0100
Subject: [Swig-user] How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5374.1174456615.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
Message-ID: <yBjMh.18122$6.14978@tornado.fastwebnet.it>

On 21/03/2007 6.49, Carl Douglas wrote:

> Hi John,
> 
> In my case, all I needed was a PyFile_AsFile to get the File *.
> However I found that Python errors going to stdout/stderr were not
> being redirected properly when my code was linking to a different
> version of the CRT than the build of Python I was using.
> 
> In the end, I came up with one of two solutions, and I really don't
> like recommending either:

I suggest people to try my GCC 4.1.2 binary installer for Windows which fully 
integrates with Python and has scripts in place to solve the MSVCR71.DLL 
problem. It was announced on this very list a few days ago:

http://www.develer.com/oss/GccWinBinaries

Feedback is welcome!
-- 
Giovanni Bajo


From mail at microcorp.co.za  Tue Mar  6 00:28:17 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 6 Mar 2007 07:28:17 +0200
Subject: How to Read Bytes from a file
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com><1172757183.819978.219440@v33g2000cwv.googlegroups.com><1172764725.827624.298180@j27g2000cwj.googlegroups.com><1172771161.015437.50000@n33g2000cwc.googlegroups.com><m2lkic2f2z.fsf@cochabamba.cs.uu.nl>
	<1173089510.258246.37250@t69g2000cwt.googlegroups.com>
Message-ID: <000301c75fbc$596aa480$03000080@hendrik>

 "Bart Ogryczak" <B.Ogr... at gmail.com> wrote:


> On Mar 5, 10:51 am, Piet van Oostrum <p... at cs.uu.nl> wrote:
> > >>>>> "Bart Ogryczak" <B.Ogryc... at gmail.com> (BO) wrote:
> > >BO> Any system with 8-bit bytes, which would mean any system made after
> > >BO> 1965. I'm not aware of any Python implementation for UNIVAC, so I
> > >BO> wouldn't worry ;-)
> >
> > 1965? I worked with non-8-byte machines (CDC) until the beginning of the
> > 80's. :=( In fact in that time the institution where Guido worked also had
such
> > a machine, but Python came later.
>
> Right, I should have written 'designed' not 'made'. UNIVACs also have
> been produced until early 1980s. Anyway, I'd call it
> paleoinformatics ;-)

The correct term is: "Data Processing", or DP for short.

- Hendrik



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 14 05:09:20 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 10:09:20 +0100
Subject: how to detect change of list of instances
In-Reply-To: <1173853239.022266.327110@d57g2000hsg.googlegroups.com>
References: <1173835404.477078.306410@b75g2000hsg.googlegroups.com>
	<pan.2007.03.14.02.11.49.934449@REMOVEME.cybersource.com.au>
	<1173853239.022266.327110@d57g2000hsg.googlegroups.com>
Message-ID: <45f7bbaa$0$24662$426a74cc@news.free.fr>

manstey a ?crit :
> Thanks.
> 
> All I want to know is whether the newlist, as a list of instances, is
> modified. I thought equality was the way to go, but is there a simpler
> way? How can I monitor the state of newlist and set a flag if it is
> changed in anyway?

<thinking-out-loud>
Override the mutators - or just wrap them in a decorator. But I don't 
know if it's "simpler". And FWIW, it won't catch modifications of 
contained objects - only modifications of the list itself. So you'd also 
need to wrap contained objects in an object that would itself detect all 
changes and notify the container. Err... Looks like equality is the way 
to go.
</thinking-out-loud>


From DustanGroups at gmail.com  Sun Mar 18 17:40:32 2007
From: DustanGroups at gmail.com (Dustan)
Date: 18 Mar 2007 14:40:32 -0700
Subject: * operator--as in *args?
In-Reply-To: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
Message-ID: <1174254032.155494.228530@e65g2000hsc.googlegroups.com>

On Mar 18, 3:53 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> Hi,
>
> I can't find any documentation for the * operator when applied in
> front of a name.  Is it a pointer?
>
> What about the @ operator?
>
> Are there python names for these operators that would make searching
> for documentation on them more fruitful?
>
> Thanks

For the *star, see apply here:
http://docs.python.org/lib/non-essential-built-in-funcs.html

For example:
aFunction(*(1,2,3))
is equivalent to:
aFunction(1,2,3)

For the @ symbol, I assume you mean function decorators:
http://docs.python.org/ref/function.html

For example:
@someDecorator
def someFunc(): pass
is equivalent to:
def someFunc(): pass
someFunc = someDecorator(someFunc)



From goodTweetieBird at hotmail.com  Tue Mar 20 18:03:28 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 20 Mar 2007 15:03:28 -0700
Subject: No module named ...
Message-ID: <1174428208.836953.161070@l75g2000hse.googlegroups.com>

I was having trouble with the 'no module named' error message when
trying to import and noticed that other successful imports were
pulling from .py files that had the dot replaced with $ and .class
appended to the name. Actually in one case it picked up a .pyc file
then created a .class file.

How do I create a .class file from my .py file so that functions can
be imported.


Thanx,

gtb



From openopt at ukr.net  Wed Mar 28 15:51:59 2007
From: openopt at ukr.net (dmitrey)
Date: 28 Mar 2007 12:51:59 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <mailman.5685.1175032114.32031.python-list@python.org>
References: <mailman.5685.1175032114.32031.python-list@python.org>
Message-ID: <1175111519.550674.160720@n59g2000hsh.googlegroups.com>

Hi!
Suppose I have a py-written module.
Is it possible somehow run PyPy on the whole module?
I didn't find it in documentation.
And if yes (or if just run in every module func) what will be after
computer restart?
Should I restart  PyPy on the module once again?
And are there any chances/intends for  PyPy to be included into Python
core?
Thx, D.


On Mar 28, 12:48 am, Carl Friedrich Bolz <cfb... at gmx.de> wrote:
> ==========================================PyPy1.0: JIT compilers for free and more
> ==========================================
>
> Welcome to thePyPy1.0 release - a milestone integrating the results
> of four years of research, engineering, management and sprinting
> efforts, concluding the 28 months phase of EU co-funding!
>
> Although still not mature enough for general use,PyPy1.0 materializes
> for the first time the full extent of our original vision:
>
> - A flexible Python interpreter, written in "RPython":
>
>    - Mostly unaware of threading, memory and lower-level target platform
>      aspects.
>    - Showcasing advanced interpreter features and prototypes.
>    - Passing core CPython regression tests, translatable to C, LLVM and
> .NET.
>
> - An advanced framework to translate such interpreters and programs:
>
>    - That performs whole type-inference on RPython programs.
>    - Can weave in threading, memory and target platform aspects.
>    - Has low level (C, LLVM) and high level (CLI, Java, JavaScript)
> backends.
>
> - A **Just-In-Time Compiler generator** able to **automatically**
>    enhance the low level versions of our Python interpreter, leading to
>    run-time machine code that runs algorithmic examples at speeds typical
>    of JITs!
>
> Previous releases, particularly the 0.99.0 release from February,
> already highlighted features of our Python implementation and the
> abilities of our translation approach but the **new JIT generator**
> clearly marks a major research result and gives weight to our vision
> that one can generate efficient interpreter implementations, starting
> from a description in a high level language.
>
> We have prepared several entry points to help you get started:
>
> * The main entry point for JIT documentation and status:
>
>    http://codespeak.net/pypy/dist/pypy/doc/jit.html
>
> * The main documentation and getting-startedPyPyentry point:
>
>    http://codespeak.net/pypy/dist/pypy/doc/index.html
>
> * Our online "play1" demos showcasing various Python interpreters,
>    features (and a new way to program AJAX applications):
>
>    http://play1.codespeak.net/
>
> * Our detailed and in-depth Reports about various aspects of the
>    project:
>
>    http://codespeak.net/pypy/dist/pypy/doc/index-report.html
>
> In the next few months we are going to discuss the goals and form of
> the next stage of development - now more than ever depending on your
> feedback and contributions - and we hope you appreciatePyPy1.0 as an
> interesting basis for greater things to come, as much as we do
> ourselves!
>
> have fun,
>
>      thePyPyrelease team,
>      Samuele Pedroni, Armin Rigo, Holger Krekel, Michael Hudson,
>      Carl Friedrich Bolz, Antonio Cuni, Anders Chrigstroem, Guido Wesdorp
>      Maciej Fijalkowski, Alexandre Fayolle
>
>      and many others:
>      http://codespeak.net/pypy/dist/pypy/doc/contributor.html
>
> What isPyPy?
> ================================
>
> Technically,PyPyis both a Python interpreter implementation and an
> advanced compiler, or more precisely a framework for implementing dynamic
> languages and generating virtual machines for them.
>
> The framework allows for alternative frontends and for alternative
> backends, currently C, LLVM and .NET.  For our main target "C", we can
> can "mix in" different garbage collectors and threading models,
> including micro-threads aka "Stackless".  The inherent complexity that
> arises from this ambitious approach is mostly kept away from the Python
> interpreter implementation, our main frontend.
>
> PyPyis now also a Just-In-Time compiler generator.  The translation
> framework contains the now-integrated JIT generation technology.  This
> depends only on a few hints added to the interpreter source and should
> be able to cope with the changes to the interpreter and be generally
> applicable to other interpreters written using the framework.
>
> Socially,PyPyis a collaborative effort of many individuals working
> together in a distributed and sprint-driven way since 2003.  PyPywould
> not have gotten as far as it has without the coding, feedback and
> general support from numerous people.
>
> Formally, many of the current developers were involved in executing an
> EU contract with the goal of exploring and researching new approaches
> to language and compiler development and software engineering.  This
> contract's duration is about to end this month (March 2007) and we are
> working and preparing the according final review which is scheduled
> for May 2007.
>
> For the future, we are in the process of setting up structures to help
> maintain conceptual integrity of the project and to discuss and deal
> with funding opportunities related to furtherPyPysprinting and
> developments. See here for results of the discussion so far:
>
>      http://codespeak.net/pipermail/pypy-dev/2007q1/003577.html
>
> 1.0.0 Feature highlights
> ==============================
>
> Here is a summary list of key features included inPyPy1.0:
>
> - The Just-In-Time compiler generator, now capable of generating the
>    first JIT compiler versions of our Python interpreter:
>
>    http://codespeak.net/pypy/dist/pypy/doc/jit.html
>
> - More Python interpreter optimizations (a CALL_METHOD bytecode, a method
>    cache, rope-based strings), now running benchmarks at around half of
>    CPython's speed (without the JIT):
>
>    http://codespeak.net/pypy/dist/pypy/doc/interpreter-optimizations.html
>
> - The Python interpreter can be translated to .NET and enables
>    interactions with the CLR libraries:
>
>    http://codespeak.net/pypy/dist/pypy/doc/cli-backend.html
>    http://codespeak.net/pypy/dist/pypy/doc/clr-module.html
>
> - Aspect Oriented Programming facilities (based on mutating the Abstract
>    Syntax Tree):
>
>    http://codespeak.net/pypy/dist/pypy/doc/aspect_oriented_programming.html
>
> http://codespeak.net/pypy/extradoc/eu-report/D10.1_Aspect_Oriented_Pr...
>
> - The JavaScript backend has evolved to a point where it can be used to
>    write AJAX web applications with it. This is still an experimental
>    technique, though. For demo applications which also showcase various
>    generated Python and PROLOG interpreters, see:
>
>    http://play1.codespeak.net/
>
> - Proxying object spaces and features of our Python interpreter:
>
>    - Tainting: a 270-line proxy object space tracking and boxing
>      sensitive information within an application.
>
>    - Transparent proxies: allow the customization of both application and
>      builtin objects from application level code.  Now featuring an
>      initial support module (tputil.py) for working with transparent
>      proxies.
>
> For a detailed description and discussion of high level backends and
> Python interpreter features, please see our extensive "D12" report:
>
> http://codespeak.net/pypy/extradoc/eu-report/D12.1_H-L-Backends_and_F...
>
> Funding partners and organisations
> =====================================================
>
> PyPydevelopment and activities happen as an open source project and
> with the support of a consortium partially funded by a 28 month
> European Union IST research grant for the period from December 2004 to
> March 2007. The full partners of that consortium are:
>
>      Heinrich-Heine University (Germany), Open End (Sweden)
>      merlinux GmbH (Germany), tismerysoft GmbH (Germany)
>      Logilab Paris (France), DFKI GmbH (Germany)
>      ChangeMaker (Sweden), Impara (Germany)




From stargaming at gmail.com  Mon Mar  5 13:41:52 2007
From: stargaming at gmail.com (Stargaming)
Date: Mon, 05 Mar 2007 19:41:52 +0100
Subject: New to Python
In-Reply-To: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
References: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
Message-ID: <esho9n$20pk$1@ulysses.news.tiscali.de>

dnwurtz at gmail.com schrieb:
> I am trying to get a program to add up input from the user to get to
> the number 100 using a loop.  However, I am having some issues.  Here
> is what I have so far.  I know I am just trying to hard, but I am
> stuck.  Thank you for any help.
> 
> print "We need to count to 100"
> 
> high_number = 100
> total = 0
> 
> number = input("Enter your first number ")
> sum = number + total
> while sum < high_number:
>     print "Not there yet..."
>     number = input("Enter another number ")
> 
> print "We are there!!!"
> 

Just reading the error messages would be a good start. You assign `sum` 
to `number + total` but as I see it there's no `number` so far. You have 
to increment some variable with the user's input. (`sum += input(..)`)
Additionally, `total` and `number` seem pretty redundant. You only need 
two variables, one containing the targeted number, one the current progress.
By the way, input() is considered pretty evil because the user can enter 
arbitrary expressions. It is recommended to use raw_input() (till Python 
3.0), in your case e. g. int(raw_input()) wrapped in a try-except block.
HTH,
Stargaming


From B.Ogryczak at gmail.com  Mon Mar  5 09:29:23 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 5 Mar 2007 06:29:23 -0800
Subject: Dictionary of Dictionaries
In-Reply-To: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
References: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>
Message-ID: <1173104962.782667.50760@j27g2000cwj.googlegroups.com>

On Mar 5, 11:22 am, b... at yahoo.com wrote:
> messagesReceived = dict.fromkeys(("one","two"), {})

This creates two references to just *one* instance of empty
dictionary.
I'd do it like:
messagesReceived = dict([(key, {}) for key in ("one","two")])






From tavares at fe.up.pt  Sat Mar 17 06:24:58 2007
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: 17 Mar 2007 03:24:58 -0700
Subject: ECCOMAS VipIMAGE 2007 - Abstracts Submission Period Extended in TWO
	WEEKS
Message-ID: <1174127098.173714.268090@l75g2000hse.googlegroups.com>

International ECCOMAS Thematic Conference VipIMAGE 2007 - I ECCOMAS
THEMATIC
CONFERENCE ON COMPUTATIONAL VISION AND MEDICAL IMAGE PROCESSING
17-19th
October 2007, FEUP, Porto, Portugal
http://www.fe.up.pt/VIPIMAGE


We would appreciate if you could distribute this information by your
colleagues and co-workers.

Dear Colleague,

The Organizing Committee of VipMAGE has decided to extend the
submission
period in two weeks (March 31, 2007).

More details regarding VipIMAGE can be found in the conference
website:
http://www.fe.up.pt/VIPIMAGE

We are looking forward to see you in Porto next October.


Important dates

Submission of extended abstracts: March 31, 2007; Authors
Notification:
April 15, 2007; Lectures and Final Papers: May 15, 2007; Early
registration
fee: May 31, 2007.


Invited Lectures

- Automatic Generation of Computer Models from Multi-modal Bio-
medical
Imaging - Chandrajit Bajaj, USA
- Computational Bioimaging and Visualization - Chris Johnson, USA
- From Geometrical Models to Physiological Models of the Human Body -
Herv?
Delingette, France
- Latest advances in Cardiovascular Informatics - Ioannis A.
Kakadiaris, USA
- Robust Algorithms for Deformable Contours - Jorge S. Marques,
Portugal
- Image Sequence Evaluation - Juan J. Villanueva, Spain
- Fast Surface Segmentation and remeshing by finding geodesics -
Laurent
Cohen, France
- Processing of Simultaneous acquisition of EEG and fMRI - Mario
Forjaz
Secca, Portugal
- Automatic Construction of Statistical Shape Models using Non-Rigid
Registration - Tim Cootes, UK
- Theory of Digital Manifolds and its Applications to Medical Imaging
-
Valentin Brimkov, USA & Reinhard Klette, NZ


Kind regards,

Jo?o Manuel R. S. Tavares
Renato Natal Jorge
(conference co-chairs)



From aleax at mac.com  Sat Mar 17 11:49:00 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 17 Mar 2007 08:49:00 -0700
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<T9AKh.13297$tD2.11703@newsread1.news.pas.earthlink.net>
	<1hv3735.f8r5bx3czob7N%aleax@mac.com>
	<yxMKh.8126$M65.601@newssvr21.news.prodigy.net>
Message-ID: <1hv42s0.svb0kn1bx26vbN%aleax@mac.com>

John Nagle <nagle at animats.com> wrote:
   ...
> >>Mastery and quickly are opposing terms <G> Took me 15 years on a job
> >>using FORTRAN 77 and I still wouldn't have called myself a master. (I'm
   ...
>     Python just isn't that complicated.  The syntax is straightforward,

Neither is/was Fortran 77, net perhaps of a few syntax quirks that were
easily avoided; yet few practitioners took the trouble (for example) of
learning what manners of data aliasing (e.g. between routine parameters
and/or data in COMMON blocks) were legal and which were not -- such a
simple rule (if you write data through an alias and read or write the
same memory through a different alias, you're breaking the rules of the
language and the compiler's free to make dragons fly out of your nose),
yet I've lost count of the number of times I've seen it broken during my
Fortran days (broken by professional programmers who used Fortran to
make a living and yet didn't care enough to know better, mind you -- I'm
not talking about accidental mistakes, which of course can easily happen
for a rule that the compiler need not enforce, but total ignorance of
this simple rule).


Alex


From deets at nospam.web.de  Tue Mar 13 08:06:26 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 Mar 2007 13:06:26 +0100
Subject: Request for a change in the csv module.
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
	<1173747644.616698@jubilee.claranet.pt>
	<55n53lF25s78sU1@mid.uni-berlin.de>
	<1173785251.78605@jubilee.claranet.pt>
Message-ID: <55nie2F255kfqU1@mid.uni-berlin.de>

Paulo da Silva wrote:

> Diez B. Roggisch escreveu:
>> Paulo da Silva schrieb:
> ...
> 
>>> That works but it is a pain to use.
>> 
>> Why? I think it's straightforward.
> 
> That is not the point. The problem is to have things generalized.
> I have some general purpose tables whose fields format I don't know
> in advance.
> Internally the numeric values are independent of localization.
> Having a table, I don't like the idea of preformating things
> before sending them to the csv for exportation. A little more
> of programming and there will be no need for csv at all :-)
> ...

This is simply _not_ true. The details of a proper CSV format are difficult
to get right, which is precisely why the module is there.

>> The same is essentially true for dates as well, btw. How do you want to
>> deal with them?
> 
> This is a pertinent question I didn't think of. May be csv should handle
> data conversions using 'locale'.
> It is already automatically converting numbers to text
> anyway, but unconditionally using the '.'.
> As for the dates the dialect could include a format like YYYY-MM-DD
> hh:mm:ss. Dates are not always 'locale' only. In pt_PT we use
> YYYY-MM-DD or YY-MM-DD and sometimes DD-MM-YYYY.
> One must remember that csv is not part of the language. So, to have
> some kind of universality, it must use the specs (in dialect) for
> formatting and 'locale' for data conversions.

I'm not too convinced. It's so darn easy to convert the values to what one
really needs for the actual use-case. Even for your generic case - all you
need is type-based formatting dispatch.

But if you add that complexity to the writers of the csv-module, you'll end
up with a nasty configuration mechanism for special casing individual
columns, or otherwise the next user comes and says "well, I need to format
dates differently just for this case, how to do so in the csv-module". As
your own example shows. 

The purpose of the module is solely to assist in creating properly formatted
csv content in the sense that it is readable and parsable and results in
strings for column values. Not more, not less (and you seem to
underestimate that task, btw.)

That it does convert non-string-values to strings when writing could be seen
as convenience, or actual bug as it might cause troubles as you perceived
them - but the solution would clearly be to get rid of this functionality,
not enhance it.

Diez


From __peter__ at web.de  Thu Mar  1 05:25:48 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 01 Mar 2007 11:25:48 +0100
Subject: splitting perl-style find/replace regexp using python
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
	<ODxFh.3179$BE2.2738@newssvr27.news.prodigy.net>
	<1LxFh.3180$BE2.57@newssvr27.news.prodigy.net>
Message-ID: <es69ki$928$03$1@news.t-online.com>

James Stroud wrote:

> James Stroud wrote:
>> John Pye wrote:
>>> Hi all
>>>
>>> I have a file with a bunch of perl regular expressions like so:
>>>
>>> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
>>> bold
>>> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
>>> b>''$3/ # italic bold
>>> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
>>> italic
>>>
>>> These are all find/replace expressions delimited as '/search/replace/
>>> # comment' where 'search' is the regular expression we're searching
>>> for and 'replace' is the replacement expression.
>>>
>>> Is there an easy and general way that I can split these perl-style
>>> find-and-replace expressions into something I can use with Python, eg
>>> re.sub('search','replace',str) ?
>>>
>>> I though generally it would be good enough to split on '/' but as you
>>> see the <\/b> messes that up. I really don't want to learn perl
>>> here :-)
>>>
>>> Cheers
>>> JP
>>>
>> 
>> This could be more general, in principal a perl regex could end with a
>> "\", e.g. "\\/", but I'm guessing that won't happen here.
>> 
>> py> for p in perlish:
>> ...   print p
>> ...
>> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/
>> /(^|[\s\(])\_\_([^ ].*?[^
>> ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/b>''$3/ /(^|[\s\(])\_([^ ].*?[^
>> ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ py> import re
>> py> splitter = re.compile(r'[^\\]/')
>> py> for p in perlish:
>> ...   print splitter.split(p)
>> ...
>> ['/(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
>> "$1'''$2'''$", '']
>> ['/(^|[\\s\\(])\\_\\_([^ ].*?[^ ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
>> "$1''<b>$2<\\/b>''$", '']
>> ['/(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$',
>> "$1''$2''$", '']
>> 
>> (I'm hoping this doesn't wrap!)
>> 
>> James
> 
> I realized that threw away the closing parentheses. This is the correct
> version:
> 
> py> splitter = re.compile(r'(?<!\\)/')
> py> for p in perlish:
> ...   print splitter.split(p)
> ...
> ['', '(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$)',
> "$1'''$2'''$3", '']
> ['', '(^|[\\s\\(])\\_\\_([^ ].*?[^
> ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$)', "$1''<b>$2<\\/b>''$3", '']
> ['', '(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$)',
> "$1''$2''$3", '']

There is another problem with escaped backslashes:

>>> re.compile(r'(?<!\\)/').split(r"/abc\\/def/")
['', 'abc\\\\/def', '']

Peter


From paul at boddie.org.uk  Tue Mar  6 10:51:22 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 6 Mar 2007 07:51:22 -0800
Subject: Wrong exist status for os.system, os.poepen, etc.
In-Reply-To: <mailman.4719.1173195592.32031.python-list@python.org>
References: <mailman.4719.1173195592.32031.python-list@python.org>
Message-ID: <1173196282.319123.230430@p10g2000cwp.googlegroups.com>

On 6 Mar, 16:39, "Paolo Pantaleo" <paolopanta... at gmail.com> wrote:
>
> The os.system() (but all the other funciont with similar behavior) reports
> wrong exit status. I can reproduce the bug in the following way

I think you should look at some previous threads related to this
(obtained by searching Google Groups for "os.system exit status
code"):

"grabbing return codes from os.system() call"
http://groups.google.com/group/comp.lang.python/browse_frm/thread/efeab8a50ff16975/

"please help me understand os.system() result"
http://groups.google.com/group/comp.lang.python/browse_frm/thread/4a9ab6d5a609e9ca/

"os.system() << 8 ?"
http://groups.google.com/group/comp.lang.python/browse_frm/thread/f12ccab6389f482c/

In short, the returned code is actually a combination of two values,
and you need to extract the expected status code by shifting the
result 8 bits to the right. It may actually be more complicated than
that, but the man page for system ("man 3 system") explains this in
more detail.

Paul



From beliavsky at aol.com  Mon Mar 26 18:57:31 2007
From: beliavsky at aol.com (Beliavsky)
Date: 26 Mar 2007 15:57:31 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <mailman.5628.1174916538.32031.python-list@python.org>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
Message-ID: <1174949851.558066.9500@b75g2000hsg.googlegroups.com>

On Mar 26, 8:42 am, Jean-Paul Calderone <exar... at divmod.com> wrote:

<snip>

> You can get the speed of fortran in Python by using libraries like
> Numeric without losing the readability of Python.

Numeric and Numpy will faster than raw Python for array operations,
but I don't think they will match well-written C or Fortran, because
compilers can better optimize code in those "less dynamic" languages.

Someone recently mentioned here ("Quantum term project code- for
interest and for help") an example where Numeric was 180 times faster
in Fortran 95 using gfortran, asking for advice on how to speed up the
Python code -- see
https://wiki.asu.edu/phy416/index.php/A_Simple_Bose-Einstein_Condensate_Simulation
. No one replied.




From greg at cosc.canterbury.ac.nz  Sun Mar  4 19:39:47 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Mon, 05 Mar 2007 13:39:47 +1300
Subject: Questions about app design - OOP with python classes
In-Reply-To: <7x3b4lucn1.fsf@ruckus.brouhaha.com>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<7xabywnugu.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>
	<7xtzx4i43e.fsf@ruckus.brouhaha.com>
	<pan.2007.03.03.23.15.30.246639@REMOVE.THIS.cybersource.com.au>
	<7x3b4lucn1.fsf@ruckus.brouhaha.com>
Message-ID: <5517avF227a11U1@mid.individual.net>

Paul Rubin wrote:

> Maybe we can concoct a cross between Python and Haskell, and call it
> "Paskell" after the philosopher Blaise ;-).

No, we name it after Pascall's confectionery:

   http://www.homesick-kiwi.com/productpage.php?id=51

Lots of syntactic sugar. :-)

--
Greg


From cyberco at gmail.com  Sat Mar 10 18:16:00 2007
From: cyberco at gmail.com (cyberco)
Date: 10 Mar 2007 15:16:00 -0800
Subject: PIL: reading bytes from Image
Message-ID: <1173568560.648691.61760@64g2000cwx.googlegroups.com>

I'm using web.py to send an image to the client. This works
(shortened):

print open(path, "rb").read()

but this doesn't:

img = Image.open(path)
img.thumbnail((10,10))
print img.getdata()

or

print img.load()


How do I get the bytes of the Image object? 'getdata()' seemed the
way, but unfortunately...



From fabiofz at gmail.com  Tue Mar  6 10:40:56 2007
From: fabiofz at gmail.com (Fabio Zadrozny)
Date: Tue, 6 Mar 2007 12:40:56 -0300
Subject: wxPython import error...
In-Reply-To: <1173055327.592532.256350@p10g2000cwp.googlegroups.com>
References: <1173055327.592532.256350@p10g2000cwp.googlegroups.com>
Message-ID: <cfb578b20703060740r40220b91s628a5c0a7410b480@mail.gmail.com>

On 4 Mar 2007 16:42:07 -0800, king kikapu <aboudouvas at panafonet.gr> wrote:
>
> Hi,
>
> i am just completed installing Python/Pydev/Eclipse/wxPython on an
> Ubuntu system and all are running fine except program that contains
> references to wx
>
> It gives me:
> ImportError: /usr/lib/python2.4/site-packages/wx-2.8-gtk2-unicode/wx/
> _core_.so: undefined symbol: PyUnicodeUCS4_FromEncodedObject
>
> I installed the wx packages the way the wx web site says, especially
> for Ubuntu.
>
> Can anyone help with this as i have been searching the net for this
> with no luck...
>

Is your pythonpath configured correctly within pydev (and not just in the
system?) -- see http://fabioz.com/pydev/manual_101_interpreter.html

Cheers,

Fabio
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From gagsl-py2 at yahoo.com.ar  Sun Mar 11 06:44:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 07:44:12 -0300
Subject: Parsing Indented Text (like parsing Python)
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<000a01c763c0$6863a560$2102fea9@Guides.local>
Message-ID: <op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 06:34:03 -0300, Mike Schinkel <mikeschinkel at gmail.com>  
escribi?:

> I'm trying to write an app that parses a text file containing an outline
> useing essentially the same indentation rules as Python source code, i.e.
> the first level has no indent, the second level has one indent, third

You can get some ideas from tabnanny.py or reindent.py, but perhaps they  
are too specific at parsing Python code.

I hope this informal description may help:

Start with IC = Previous IC = 0, and a stack with a single 0 element
For each line in the file:
   compute the indentation column IC (that is, count the number of leading  
whitespace characters; perhaps replacing tabs as 8 spaces)
   compare IC with the Previous IC:
   	same: continue with next line
	IC > previous ("indent"): push IC onto indent stack
	IC < previous ("dedent"):
		discard top of stack
		look at the new top of stack (but dont discard it); if not the same,  
indentation error.
   Previous IC = IC
	
Note: You can rewrite the above without using Previous IC, only the  
stack... left to the reader :)
Note 2: At each stage, the "indentation level" is the current stack size.

-- 
Gabriel Genellina



From MonkeeSage at gmail.com  Mon Mar  5 22:45:38 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 19:45:38 -0800
Subject: how can I find out the value of an environment variable?
In-Reply-To: <1173147734.603718.179870@8g2000cwh.googlegroups.com>
References: <1173147734.603718.179870@8g2000cwh.googlegroups.com>
Message-ID: <1173152738.059111.182590@30g2000cwc.googlegroups.com>

On Mar 5, 8:22 pm, "ken" <ken.carl... at gmail.com> wrote:
> how can I find out the value of an environment variable in my pythong
> script?
>
> Thank you.

RTFM...

os.getenv
http://docs.python.org/lib/os-procinfo.html

Regards,
Jordan



From paddy3118 at googlemail.com  Sat Mar  3 11:02:18 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 3 Mar 2007 08:02:18 -0800
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <1172937737.992104.223720@8g2000cwh.googlegroups.com>

On Mar 2, 10:44 pm, "Shawn Milo" <S... at Milochik.com> wrote:
> I'm new to Python and fairly experienced in Perl, although that
> experience is limited to the things I use daily.
>
> I wrote the same script in both Perl and Python, and the output is
> identical. The run speed is similar (very fast) and the line count is
> similar.
>
> Now that they're both working, I was looking at the code and wondering
> what Perl-specific and Python-specific improvements to the code would
> look like, as judged by others more knowledgeable in the individual
> languages.

Hi Shawn, there is a web page that gives examples from Perl's
Datastructures Cookbook re-implemented in Python. It might be of help
for future Python projects:
  http://wiki.python.org/moin/PerlPhrasebook

- Paddy.




From mail at microcorp.co.za  Tue Mar 13 02:20:49 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Tue, 13 Mar 2007 08:20:49 +0200
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au><55fbgjF2492skU1@mid.individual.net><1173573654.009953.266280@30g2000cwc.googlegroups.com><7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
Message-ID: <01f501c7653e$1ee8cee0$03000080@hendrik>

 "Nick Craig-Wood" <nick at craig-wood.com> wrote:

> Paul Rubin <http> wrote:
> >  The fencepost method still seems to be simplest:
> > 
> >      t = sorted(random.sample(xrange(1,50), 4))
> >      print [(j-i) for i,j in zip([0]+t, t+[50])]
> 
> Mmm, nice.
> 
> Here is another effort which is easier to reason about the
> distribution produced but not as efficient.
> 
> def real(N, M):
>     while 1:
>         t = [ random.random() for i in range(N) ]
>         factor = M / sum(t)
>         t = [ int(round(x * factor)) for x in t]
>         if sum(t) == M:
>             break
>         print "again"
>     assert len(t) == N
>     assert sum(t) == M
>     return t
> 
> It goes round the while loop on average 0.5 times.
> 
> If 0 isn't required then just test for it and go around the loop again
> if found.  That of course skews the distribution in difficult to
> calculate ways!
> 

I have been wondering about the following as this thread unrolled:

Is it possible to devise a test that can distinguish between sets
of:

- five random numbers that add to 50, and
- four random numbers and a fudge number that add to 50?

My stats are way too small and rusty to attempt to answer 
the question, but it seems intuitively a very difficult thing.

- Hendrik



From nagle at animats.com  Mon Mar 19 13:01:23 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 19 Mar 2007 17:01:23 GMT
Subject: Documentation for "str()" could use some adjustment - Unicode
	issue
In-Reply-To: <mailman.5276.1174294980.32031.python-list@python.org>
References: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>
	<mailman.5276.1174294980.32031.python-list@python.org>
Message-ID: <DlzLh.14853$uo3.6108@newssvr14.news.prodigy.net>

Daniel Nogradi wrote:
>> The Python documentation for "str" says
>> "str([object]) :
>>      Return a string containing a nicely printable representation of an
>> object."
>>
>> However, there's no mention of the fact that "str" of a Unicode string
>> with non-ASCII characters will raise a conversion exception.  The
>> documentation (and several Python books) seem to indicate that "str" will
>> produce some "printable representation" for anything, not raise an
>> exception.
>>
>> I know, it was proposed in PEP 349 to change "str" to return Unicode
>> strings, and that's coming someday, along with all-Unicode Python,
>> but meanwhile, the documentation should be clear about this.
> 
> 
> Hi John, I'm not at all an expert around here but my understanding of
> the workflow is that bug reports should be submitted to the tracker at
> sourceforge. There is no guarantee that they will be noticed there but
> the chances there are much higher than for a message on the mailing
> list. I just mention this because I've seen your mysqld, urllib and
> other potentially important bug reports here with no action taken but
> maybe submitting them to sourceforge would attract some developers.

     More people read the mailing list than the bug reports, and
Google indexes it, so it puts the problem on record.   If this problem
were reported as a bug, there'd be denial that it was a problem, on
the grounds that it will be fixed in a future version of Python.

     This was addressed in PEP 349 (status "Deferred"), so it's
a known problem that's being ignored.

     Python strings are in transition; in ASCII-only Python, "str"
could never raise a conversion exception, and when we get to
Unicode-only strings, "str" will never raise a conversion exception.
But right now, "str" can definitely raise an exception.

    The real problem is the published books on Python:

"Learning Python", by Lutz and Ascher:
    "str(string) -- returns the string representation of any object."

"Python in a Nutshell", by Martelli
    Doesn't really address the issue, but says that "print" calls
"str" for conversions.

Neither of these mentions that "str" is ASCII-only.

     I think that you can use "unicode()" on any object on
which you can use "str()", but I'm not sure that's official.

     Incidentally, is "repr" ASCII-only, or does it understand
Unicode?  And what happens if the __str__() method of an object
returns Unicode?
	
				John Nagle


From olsonas at gmail.com  Wed Mar 14 11:49:21 2007
From: olsonas at gmail.com (Drew)
Date: 14 Mar 2007 08:49:21 -0700
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <et958a$o9c$1@news2.u-psud.fr>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr>
Message-ID: <1173887361.736336.215330@l75g2000hse.googlegroups.com>

On Mar 14, 11:44 am, Laurent Pointal <laurent.poin... at limsi.fr> wrote:
> Both work, you may prefer xrange/iteritems for iteration on large
> collections, you may prefer range/items when processing of the result
> value explicitly need a list (ex. calculate its length) or when you are
> going to manipulate the original container in the loop.
>
> A+
>
> Laurent.

Laurent -

Extremely helpful, exactly what I was looking for.

Thanks,
Drew



From jkn_gg at nicorp.f9.co.uk  Sat Mar 31 10:05:58 2007
From: jkn_gg at nicorp.f9.co.uk (jkn)
Date: 31 Mar 2007 07:05:58 -0700
Subject: Indentation for code readability
In-Reply-To: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <1175349958.840426.50710@p15g2000hsd.googlegroups.com>

If I wanted to mark out stack depth stuff like this in python, I'd do
it
with some form of stylised comment, like this:

    # LEVEL 0

    pushMatrix():
    # ....LEVEL 1

    drawstuff()
    pushMatrix()
    # ........LEVEL 2

    drawSomeOtherStuff()
    popMatrix()
    # ....LEVEL 1

    popMatrix()
    # LEVEL 0

(there's probably a better comment form for your specific
requirement).

Any decent modern editor should be capable of being set up to
highlight such lines in a colour/style of your choice, and you then
set your eyeball filter to look for those lines when you want to be
sure of where you are.

    jon N



From kale.priya at gmail.com  Fri Mar 16 00:33:15 2007
From: kale.priya at gmail.com (priya kale)
Date: Fri, 16 Mar 2007 10:03:15 +0530
Subject: Need help with apack compression code
Message-ID: <864f00810703152133j812649bw3d890686043ce481@mail.gmail.com>

I need to code for decompressing the file which is compressed using Apack, I
am supposed to code it in visual c++, Plz help me finding algorithm
compatible to Widows based C or c++.

Regards,
 Priya Kale
(Pune)
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From misterwang at gmail.com  Tue Mar  6 10:08:11 2007
From: misterwang at gmail.com (Peter  Wang)
Date: 6 Mar 2007 07:08:11 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
Message-ID: <1173193691.204641.206600@s48g2000cws.googlegroups.com>

On Mar 5, 12:31 am, "Adam Atlas" <a... at atlas.st> wrote:
> Right now I'm just testing and polishing up the code... in the
> meantime, any comments?

How does this work with compiled extension modules?



From lbates at websafe.com  Thu Mar  1 10:24:03 2007
From: lbates at websafe.com (Larry Bates)
Date: Thu, 01 Mar 2007 09:24:03 -0600
Subject: Eric on XP for Newbie
In-Reply-To: <1172679222.026525.248430@a75g2000cwd.googlegroups.com>
References: <1172679222.026525.248430@a75g2000cwd.googlegroups.com>
Message-ID: <45E6F013.5050901@websafe.com>

jeffwatkins2000 at gmail.com wrote:
> I'm starting on the path of freeing myself from proprietory software
> but I need to migrate, not make one huge jump.
> 
> I'm looking at using Python and Eric for programming
> 
> I've got Python up and running but can someone please point me to a
> simple step by step guide for installing Eric? I've downloaded the tar
> files, but what do I do with them?
> 
> Thanks
> 

Take a look at PyScripter also.  I REALLY like it a lot on Windows:

http://mmm-experts.com/Products.aspx?ProductId=4

-Larry


From dave.opstad at monotypeimaging.com  Tue Mar 13 16:14:22 2007
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Tue, 13 Mar 2007 13:14:22 -0700
Subject: struct.pack oddity
References: <45f6bd4a$0$6972$afc38c87@> <45f6d7a9$1@nntp.zianet.com>
	<P6edncuAzZrYemvYnZ2dnUVZ_qLinZ2d@comcast.com>
Message-ID: <dave.opstad-383C49.13142213032007@reader0901.news.uu.net>

In article <P6edncuAzZrYemvYnZ2dnUVZ_qLinZ2d at comcast.com>,
 Larry Bates <lbates at websafe.com> wrote:

> 1) You can't put 100000 into a half-word.  The limit is 2**16
> or 65535. On Python 2.5 I get:

Yes, I know. I used that example to illustrate the problem. If a value 
does not fit a format then Python should report that consistently, 
independent of whether a byte-order indication is explicit or implicit.

Dave


From aleax at mac.com  Sun Mar 11 13:26:57 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 10:26:57 -0700
Subject: Signed zeros:  is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
Message-ID: <1hut07q.1fhewdebmz1c0N%aleax@mac.com>

Mark Dickinson <dickinsm at gmail.com> wrote:

> I get the following behaviour on Python 2.5 (OS X 10.4.8 on PowerPC,
> in case it's relevant.)
> 
> >>> x, y = 0.0, -0.0
> >>> x, y
> (0.0, 0.0)
> >>> x, y = -0.0, 0.0
> >>> x, y
> (-0.0, -0.0)
> 
> I would have expected y to be -0.0 in the first case, and 0.0 in the
> second.  Should the above be considered a bug, or is Python not
> expected to honour signs of zeros?  I'm working in a situation
> involving complex arithmetic where branch cuts, and hence signed
> zeros, are important, and it would be handy if the above code could be
> relied upon to do the right thing.

Looks to me like you've found a bug with the parser/compiler:

>>> c=compile('-0.0,0.0', 'eval', 'eval')
>>> eval(c)
(-0.0, -0.0)
>>> dis.dis(c)
  1           0 LOAD_CONST               1 ((-0.0, -0.0))
              3 RETURN_VALUE 

Similar problems appear in parsing display forms of lists and dicts and
calls to functions with constant arguments (among which a constant 0.0
and a constant -0.0) -- and more generally when both constants -0.0 and
0.0 appear within the same "unit of compilation" (expression, function,
...) as for example in:

>>> def f():
...   a = -0.0
...   return a, 0.0
... 
>>> f()
(-0.0, -0.0)
>>> 

Why I think it has specifically to do with parsing/compiling, e.g.:

>>> {23:-0.0, 45:0.0}
{45: -0.0, 23: -0.0}
>>> x=0.0
>>> y=-0.0
>>> {23:x, 45:y}
{45: -0.0, 23: 0.0}
>>> 

so there appears to be no problem once the 0.0 and -0.0 values come from
variables or the like -- only if they're both from constants within the
same "unit of compilation".  Indeed, if you put the code above in a
function, rather than in separate entries to the toplevel
interpreter...:

>>> def g():
...   x = 0.0
...   y = -0.0
...   return {23:x, 45:y}
... 
>>> g()
{45: 0.0, 23: 0.0}
>>> 

...the bug surfaces again.  Looks a bit like the result of a slightly
errant "peephole optimizer" pass which tries to roll multiple
occurrences of "the same constant" within the same codeobject into a
single one, and consider two immutables a "multiple occurrence" if
they're == to each other (as, indeed, 0.0 and -0.0 must be).

The Python-coded compiler package does NOT give the problem:

>>> compiler.compile('-0.0,0.0','zap','eval')
<code object <expression> at 0x70068, file "zap", line 1>
>>> dis.dis(_)
  1           0 LOAD_CONST               1 (0.0)
              3 UNARY_NEGATIVE      
              4 LOAD_CONST               1 (0.0)
              7 BUILD_TUPLE              2
             10 RETURN_VALUE        

...presumably because it doesn't do peephole optimization (nor any other
kind of optimization).

Unfortunately I've never really looked in depth into these parts of
Python so I can't help much; however, if you open a bug at
<http://sourceforge.net/tracker/?group_id=5470> I think you stand a good
chance of eventually seeing it fixed in 2.5.x for some x.
Python/peephole.c does appear to be taking some care in constant
folding:

    192                 case UNARY_NEGATIVE:
    193                         /* Preserve the sign of -0.0 */
    194                         if (PyObject_IsTrue(v) == 1)
    195                                 newconst = PyNumber_Negative(v);

so I suspect the problem is elsewhere, but I can't find it yet.


Alex


In the meantime, I hope that some available workarounds for the bug are
clear from this discussion: avoid using multiple constants in a single
compilation unit where one is 0.0 and another is -0.0, or, if you really
can't avoid that, perhaps use compiler.compile to explicitly build the
bytecode you need.



From flgoms at hotmail.com  Mon Mar 12 13:01:18 2007
From: flgoms at hotmail.com (Fabio Gomes)
Date: Mon, 12 Mar 2007 20:01:18 +0300
Subject: backslashes in lists
Message-ID: <BAY126-W180C94A3AFF8B3B6C57D78D37D0@phx.gbl>


It didn't work. I decided to submit the code in the list.It is a script running with Jython to modify some configurations in the Websphere Application Server that has a Java like command line that interprets jython or jacl. I decided to use Jython.All the properties in that server are stored in hierarchy in the form of lists into lists. An exemple of one of the properties follows:['systemProperties', [[['description', 'Arquivo de configuracao da arquitetura'], ['name', 'A_INI'], ['required', 'false'], ['value', '/xml/a_ini.xml']], [['description', 'Raiz do Ambiente'], ['name', 'A_ROOT'], ['required', 'false'], ['value', 'file://D:\\A\\D9']]]]All above in a single string.To make the things easier to me and the other people who will read that script, I decided to declare each subset of lists separatly. Something like that:list1 = ['name', 'value']list2 = ['path', 'c:\some\path']list3 = [list1, list2]But doing that, list2 will be parsed by repr() and will receive an extra '\' when inserted int list3, messing up with the path information. I need some aproach to build that string without have to write it in one long and confuse string. Maybe hash tables will be the answer. I need to read about it.The entire code follows, remembering you that AdminConfig is an object present only in the WebSphere:## Creates the JVM custom properties A_INI and A_ROOT## Custom Propertiesattr1_desc     = ['description', 'Arquivo de configuracao da arquitetura']attr1_name     = ['name', 'A_INI']attr1_required = ['required', 'false']attr1_value    = ['value', '/xml/a_ini.xml']attr1_List     = [attr1_desc, attr1_name, attr1_required, attr1_value]attr2_desc     = ['description', 'Raiz do Ambiente']attr2_name     = ['name', 'A_ROOT']attr2_required = ['required', 'false']# ID of all application serversallServers = AdminConfig.getid('/Server:/')import  javalineSeparator = java.lang.System.getProperty('line.separator')arrayAllServers = allServers.split(lineSeparator)# processing for each serverfor serverID in arrayAllServers:  # bypass if it isn't an (real) application server  if AdminConfig.showAttribute(serverID, 'name') == 'dmgr':    continue  if AdminConfig.showAttribute(serverID, 'name') == 'nodeagent':    continue  if AdminConfig.showAttribute(serverID, 'name') == 'webserver':    continue  serverName = AdminConfig.showAttribute(serverID, 'name')  print 'Atualizando o servidor', serverName, '...'  jvm = AdminConfig.list('JavaVirtualMachine', serverID)  path = 'file://D:\\A\\' + serverName[5:]  attr2_value = ['value', path]  attr2_List  = [attr2_desc, attr2_name, attr2_required, attr2_value]  attr_List   = [attr1_List, attr2_List]  property    = ['systemProperties', attr_List]  AdminConfig.modify(jvm, [property])print 'Salvando configuracoes...'AdminConfig.save()#EOF
 Date: Mon, 12 Mar 2007 13:40:58 -0300From: lucastorri at gmail.comTo: flgoms at hotmail.comSubject: Re: backslashes in listsCC: python-list at python.orgjust like the same way, but replace alist -> list:str(list).replace('\\\\','\\')as the time you call str(object) you will have an object of type string, and you can do whatever you want/could do with it...
what are you trying?! isn't more interesting use a hash table?On 3/12/07, Fabio Gomes <flgoms at hotmail.com
> wrote:




Nice, Lucas.  But help me again, please. What about "echoing" the list:>>> str(alist).replace('\\\\','\\')"['a', 'b', 'c:\\some\\path']"
  Because in my script I'm echoing the list to mount lists into lists, like:>>> list1 = ['name', 'test']>>> list2 = ['path', 'c:\some\path']
>>> list = [list1, list2]>>> print list[['name', 'test'], ['path', 'c:\\some\\path']]  That's how it is coded in my script. What do you think. Is it possible to print "list" without the doubled backslash?
  Thank again, Lucas.  Date: Mon, 12 Mar 2007 12:15:10 -0300
From: lucastorri at gmail.comTo: 
flgoms at hotmail.comSubject: Re: backslashes in listsCC: python-list at python.org
I don't know how ugly this look like, but { print str(alist).replace('\\\\', '\\') } works...On 3/12/07, 
Fabio Gomes <flgoms at hotmail.com> wrote:





Yes, Luca.  I noticed that printing the list item will show the string as expected. But I need to print the entire list in the script I'm writing and doing that, the list will will be repr()'ed. Is there any way to print the entire list without being parsed by repr()?

 Date: Mon, 12 Mar 2007 12:00:19 -0300From: 

lucastorri at gmail.comTo: flgoms at hotmail.comSubject: Re: backslashes in listsCC: 

python-list at python.orgThe backslash is a key to enter especial characters, like breakline: '\n'There is two backslashes cause of this especial condition of this char, but if you try print the specific string you will see that only one backslash remain:
print alist[2]On 3/12/07, Fabio Gomes <flgoms at hotmail.com
> wrote:






Hi list,  I'm trying to use a string with backslashes in a list. But Python parses strings in lists with repr().>>> alist = ['a', 'b', 'c:\some\path']>>> alist
['a', 'b', 'c:\\some\\path']>>> print alist['a', 'b', 'c:\\some\\path']  I already tried str() and raw (r) but it didn't work. All I want is to keep a single backslash in the string since it is a path information.
  Can anyone help me, please?  Thank you.O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na Web e sua rede amigos. 


Confira!
--http://mail.python.org/mailman/listinfo/python-list



Busque em qualquer p?gina da Web com alta prote??o. Obtenha o Windows Live Toolbar GRATUITO ainda hoje! 

Experimente agora!
--http://mail.python.org/mailman/listinfo/python-list


O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na Web e sua rede amigos. 
Confira!
--http://mail.python.org/mailman/listinfo/python-list


_________________________________________________________________
Ligue para os seus amigos gr?tis. Fa?a chamadas de PC-para-PC pelo messenger-- GR?TIS
http://get.live.com/messenger/overview
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From spe.stani.be at gmail.com  Tue Mar  6 11:26:09 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 6 Mar 2007 08:26:09 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173166774.038781.262760@t69g2000cwt.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
	<1173166774.038781.262760@t69g2000cwt.googlegroups.com>
Message-ID: <1173198369.791160.194030@8g2000cwh.googlegroups.com>

On Mar 6, 8:39 am, "Nick Vatamaniuc" <vatam... at gmail.com> wrote:
> On Mar 5, 5:16 pm, "Alex Li" <likw... at gmail.com> wrote:
>
> > Hello,
>
> > I would like to use Python 2.5 on Windows with Graphviz to generate
> > graphs.  I used yapgvb but it only requires Python 2.4 (won't work
> > with Python 2.5).  Other packages like pydot seems to be unmaintained
> > or requires custom building to be used on Windows (pygraphviz), which
> > I tried to avoid.  Any suggestions?
>
> > Thanks in advance,
> > Alex
>
> Alex,
> You can always pipe your dot file directly to the dot or neato
> executables using the subprocess method then read the output. This way
> you don't have to install yapgvb or other adapters and it will work
> with Python 2.5. But you will need to compose your dot file as a giant
> character buffer...
> -Nick V.

Not really a solution, but you can always install a virtual machine
with Ubuntu (or other linux flavour) where pydot is available for
python2.5 (sudo apt-get install python-pydot).

Stani



From deets at nospam.web.de  Tue Mar 20 09:58:01 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 20 Mar 2007 14:58:01 +0100
Subject: help - Module needs access to another module
References: <1174398386.976864.109350@p15g2000hsd.googlegroups.com>
Message-ID: <56a7j9F28bl1sU2@mid.uni-berlin.de>

abcd wrote:

> I have the following directory/file structure...
> 
> c:\foo\utils.py
> c:\foo\bar\ok.py
> 
> In ok.py I want to do something like...
> 
> import utils
> utils.helpMeDoSomething(....)
> 
> However, it seems that ok.py doesn't "know" about utils.  Other than
> manually configuring sys.path what can I do?

After a bunch of questions of that kind, I suggest you take a step back, and
read this:

http://docs.python.org/tut/node8.html

Diez


From deets at nospam.web.de  Sat Mar 24 14:06:49 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sat, 24 Mar 2007 19:06:49 +0100
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <56l7m1F29kgs9U1@mid.uni-berlin.de>

Robert Hicks schrieb:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.

Don't do it. OSX uses the shipped version for its own purposes, and 
you'll break things if you uninstall it.

Diez


From rpdooling at gmail.com  Thu Mar  1 18:19:30 2007
From: rpdooling at gmail.com (BartlebyScrivener)
Date: 1 Mar 2007 15:19:30 -0800
Subject: python equivalent of bash find
In-Reply-To: <45e744c1$0$17997$426a74cc@news.free.fr>
References: <1172780082.961223.222500@s48g2000cws.googlegroups.com>
	<45e744c1$0$17997$426a74cc@news.free.fr>
Message-ID: <1172791170.590284.158490@31g2000cwt.googlegroups.com>

On Mar 1, 3:58 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:

>
> MHO is that you'd better learn linux (well... Unix) tools. Reinventing
> the SquareWheel(tm) is usually not a good idea.

I agree. It's just a matter of experience and learning when to use
Unix tools and when to use Python.
The question never came up on Windows :)

Thanks,

rd

 "Artificial stupidity (AS) may be defined as the attempt by computer
  scientists to create computer programs capable of causing problems
  of a type normally associated with human thought."

  --Wallace Marshal





From paul at eventuallyanyway.com  Thu Mar 15 03:00:46 2007
From: paul at eventuallyanyway.com (Paul Hummer)
Date: Thu, 15 Mar 2007 07:00:46 +0000
Subject: Python books?
In-Reply-To: <1huzl72.z09y4u1xt7lpsN%aleax@mac.com>
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>	<mailman.4942.1173623618.32031.python-list@python.org>	<et9n5u$q48$1@panix3.panix.com>	<1173906223.048740.18050@b75g2000hsg.googlegroups.com>
	<1huzl72.z09y4u1xt7lpsN%aleax@mac.com>
Message-ID: <45F8EF1E.8090403@eventuallyanyway.com>

Alex Martelli wrote:
> BartlebyScrivener <rpdooling at gmail.com> wrote:
>
>   
>> On Mar 14, 3:50 pm, a... at pythoncraft.com (Aahz) wrote:
>>
>>     
>>> Some people prefer shorter books -- Python for Dummies (for new
>>> programmers) and Python in a Nutshell (for experienced programmers) both
>>> try to give a thorough survey of Python while keeping the book easy to
>>> carry.
>>>       
>
> Not for me to comment about my own books, but I can second your
> recommendation for your "for Dummies" for beginners.
>
>   
>> And other people like lots of examples and code organized around
>> practical projects a person might like to accomplish using Python. The
>> Python Cookbook 2nd edition is great for this, and Martelli et al are
>> great writers, as well as great programmers.
>>     
>
> If you like _substantial_ examples, rather than the simple/short ones
> typically used in manageable-sized books, Hetland's "Practical Python"
> was also a great buy (I believe it's now been replaced by "Beginning
> Python" by the same author, but unfortunately I haven't seen that one).
>
> In general I dislike books that try to teach a language (or other
> technology) via "substantial examples", because the issues with the
> examples may obscure those with the language or technology; e.g.,
> Stroustrup tries that route in "The C++ Programming Language", as Lutz
> does in "Programming Python", and to my taste the results are inferior.
>
> However, at least in "Practical Python" (can't speak for "Beginning
> Python"), Hetland managed to pull it off -- perhaps by placing the
> substantial programs he develops as successive examples in a clever
> sequence, so that at each step he's not dealing with many diverse new
> issues but just manageably few of them.
>
>
> Alex
>   
I'll vouch for "Beginning Python"  This was my first Python book, and it
taught me everything I needed to get started.  I still refer to it from
time to time.  After I graduated from that, I started reading "Python
Network Programming," the next book in that Apress series.

Paul
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From kadeko at gmail.com  Thu Mar 15 08:05:37 2007
From: kadeko at gmail.com (looping)
Date: 15 Mar 2007 05:05:37 -0700
Subject: cx_Oracle and unicode data
Message-ID: <1173960337.453122.168150@o5g2000hsb.googlegroups.com>

Hi,

I need to get data from an Oracle DB that contains unicode data
(chinese text).
But the chinese data that I receive is wrong (only ?).
After a look at the Oracle documentation I've found an environment
variable called NLS_LANG that you could set to define what charset the
DB client use and it work fine.

But it's not what I call a 'clean' solution and I suppose that it must
exist another way to force the client DB to use UTF8, or another
solution to get my data.
Could someone help me ?
Thanks.

Example:

# -*- coding: latin1 -*-
import os
import cx_Oracle

os.environ["NLS_LANG"] = ".UTF8"

con = cx_Oracle.connect("demo/demo at DEMOUTF8A")
cur = con.cursor()
cur.execute("select DESCRIPTION from DEC_DESCRIPTION where
DEC_DESCRIPTION_ID = 1792528")
val1 = cur.fetchone()[6]
val2 = cur.fetchone()[6]
print con.encoding, con.nencoding, con.maxBytesPerCharacter
cur.close()
print val1.decode(con.encoding)
print val2.decode(con.encoding)

del os.environ["NLS_LANG"]


>>>
UTF-8 UTF-8 3
????????????? ?????????????????????????,

without NLS_LANG setting I get:
>>>
WINDOWS-1252 WINDOWS-1252 1
????????????? ?????????????????????????,

From gagsl-py2 at yahoo.com.ar  Tue Mar 13 17:48:38 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 18:48:38 -0300
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<mailman.5035.1173819607.32031.python-list@python.org>
	<1173820592.220605.64040@l77g2000hsb.googlegroups.com>
Message-ID: <op.to5djcdkx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 18:16:32 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribi?:

> On Mar 13, 8:59 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
> [snip]
>> def find(self, search):
>>      search_re = re.compile(search, re.IGNORECASE)
>>      for result in [self.contacts[name] for name in self.contacts if
>> search_re.match(name)]:
>>          print result
>
> I do not see how
>
> for y in [f(x) for x in L if g(x)]:
>     do stuff with y
>
> can be preferable to
>
> for x in L:
>     if g(x):
>         do stuff with f(x)
>
> What can be the benefit of creating a list by comprehension for the
> sole purpose of iterating over it?

No benefit...

-- 
Gabriel Genellina



From mail at timgolden.me.uk  Fri Mar  2 04:34:47 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Fri, 02 Mar 2007 09:34:47 +0000
Subject: Python win32 tools
In-Reply-To: <2adc542f0703011513h5fe8ad26o91b0fb6a9825eb91@mail.gmail.com>
References: <2adc542f0703011513h5fe8ad26o91b0fb6a9825eb91@mail.gmail.com>
Message-ID: <45E7EFB7.4080002@timgolden.me.uk>

Sick Monkey wrote:
> I am trying to build a python program that will reset a user's account
> (password) on a windows machine. I have been working with win32
> objects and was wondering if this functionality was already built in.

I'm going to assume that "win32 objects" is the stuff in the
pywin32 extensions. While there isn't a "win32user.ResetPassword"
function in there, you can certainly use the win32com scripting
to automate ActiveDirectory and (trivially) translate this code:

   http://techtasks.com/code/viewbookcode/1592

And just to prove how wrong I can be :) the win32net module
*does* in fact have a function named NetUserChangePassword.
Doc:

"""
win32net.NetUserChangePassword
NetUserChangePassword(server, username, oldPassword, newPassword)

Changes the password for a user.

Comments
A server or domain can be configured to require that a user log on to 
change the password on a user account. If that is the case, you need 
administrator or account operator access to change the password for 
another user acount. If logging on is not required, you can change the 
password for any user account, so long as you know the current password.
"""

TJG


From gagsl-py2 at yahoo.com.ar  Thu Mar  1 05:23:55 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 01 Mar 2007 07:23:55 -0300
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
Message-ID: <op.toh9t5nux6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 28 Feb 2007 19:09:09 -0300, sjdevnull at yahoo.com  
<sjdevnull at yahoo.com> escribi?:

> On Feb 28, 11:24 am, Alan Franzoni
> <alan.franzoni_inva... at geemail.invalid> wrote:
>> Il 27 Feb 2007 16:14:20 -0800, sjdevn... at yahoo.com ha scritto:
>>
>> > Those mean different things:
>>
>> >>>> a=[1]
>> >>>> b=a
>> >>>> a += [2]
>> >>>> a
>> > [1, 2]
>> >>>> b
>> > [1, 2]
>> >>>> a=[1]
>> >>>> b=a
>> >>>> a = a + [2]
>> >>>> a
>> > [1, 2]
>> >>>> b
>> > [1]
>>
>> This is a really nasty one! I just answered to Tim above here, and then  
>> I
>> saw your example... I had never realized that kind of list behaviour.
>> That's probably because i never use + and += on lists (i prefer the more
>> explicit append() or extend() and i do copy list explictly when I want  
>> to)
>> , BTW I think this behaviour is tricky!
>
> Seems obvious and desirable to me.  Bare "=" is the way you assign a
> name to an object; saying "NAME =" will rebind the name, breaking the
> connection between a and b.  Without it, they continue to refer to the
> same object; extending the list (via += or .extend) mutates the
> object, but doesn't change which objects a and b are referencing.
>
> It would be very counterintuitive to me if "=" didn't change the
> name's binding, or if other operators did.

Note that a += b first tries to use __iadd__ if it is available, if not,  
behaves like a = a + b.
And even if __iadd__ exists, there is no restriction on it to mutate the  
object in place; it may return a new instance if desired.
So, a += b may involve a name rebinding anyway. Try the example above  
using immutable objects like tuples or strings.

-- 
Gabriel Genellina



From fd.calabrese at gmail.com  Sun Mar 18 14:02:29 2007
From: fd.calabrese at gmail.com (cesco)
Date: 18 Mar 2007 11:02:29 -0700
Subject: Optimization problem
Message-ID: <1174240949.085119.79720@p15g2000hsd.googlegroups.com>

I have a set of N blocks of different lengths. The length of each
block is a multiple of a basic unit. The blocks, once lined up, make a
path of distance equal to R. Let's say we have 5 blocks with the
following lengths: N_set_lengths = (1, 3, 2, 1, 3), then the path we
cover by lining them up is equal to R = 10.
Now, each of these blocks is associated with a different metric m
(metric) which depends on the location/position that the block
occupies within the path. So a block  of length 1 will have R = 10
different m values, one for each of the 10 positions it can occupy
within the path, while a block of length 3 will have R-3+1 = 8
different m values.

Here is a graphical representation:
 
--------------------------------------------------------------------------------
block 0:  |m0,0|m0,1|m0,2|m0,3|m0,4|m0,5|m0,6|m0,7|m0,8|m0,9|
(length 1, 10 different metrics)
 
--------------------------------------------------------------------------------
 
-------------------------------------------------------------------------------
block 1:  |m1,0|m1,1|m1,2|m1,3|m1,4|m1,5|m1,6|m1,7|       |
|      (length 3, 8 different metrics, each metric
 
-------------------------------------------------------------------------------
refers to 3 consecutive units)
 
-------------------------------------------------------------------------------
block 2:  |m2,0|m2,1|m2,2|m2,3|m2,4|m2,5|m2,6|m2,7|m2,8|       |
(length 2, 9 different metrics, each
 
-------------------------------------------------------------------------------
referring to 2 consecutive units)
 
-------------------------------------------------------------------------------
block 3:  |m3,0|m3,1|m3,2|m3,3|m3,4|m3,5|m3,6|m3,7|m3,8|m3,9|
(length 1, 10 different metrics)
 
-------------------------------------------------------------------------------
 
-------------------------------------------------------------------------------
block 4:  |m4,0|m4,1|m4,2|m4,3|m4,4|m4,5|m4,6|m4,7|       |
|      (length 3, 8 different metrics)
 
-------------------------------------------------------------------------------

Those blocks can be allocated in fact(N) possible different ways to
cover the path (In the example considered I have 5 possible blocks to
choose from to cover the first part of the path, 4 blocks to cover the
second part of the path, and so on).

Each of these possible combinations results in a different overall
metric which we can define as the sum of the individual metrics that
each block gets according to the position occupied within the path.
There is at least one combination which is the optimum solution,
because it maximizes the overall metric. Finding such a combination is
possible but it may require a long processing time.

If, for example, the number of blocks is 20 the number of possible
combinations is expressed as 2.4*10^18. In the application I'm
considering the time is really a constraint so I'm trying to find an
algorithm which would give a near optimum solution but with a much
lower complexity.

Does anyone have suggestion on how should such an algorithm behave
(possibly considering implementation issues)?

Sorry for the lengthy description, I was just trying to be as clear as
possible.
Please, don't hesitate to  ask questions if the problem statement is
not clear.

Many thanks and regards
Francesco



From steve at holdenweb.com  Thu Mar 15 08:04:18 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 15 Mar 2007 08:04:18 -0400
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <1173955724.284863.97340@y80g2000hsf.googlegroups.com>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>	<et958a$o9c$1@news2.u-psud.fr>
	<1173955724.284863.97340@y80g2000hsf.googlegroups.com>
Message-ID: <etbcqn$3eb$1@sea.gmane.org>

bearophileHUGS at lycos.com wrote:
> Laurent Pointal:
>> you may prefer range/items when processing of the result
>> value explicitly need a list (ex. calculate its length)
> 
> Creating a very long list just to know the len of an iterator is
> barbaric, so sometimes I use this:
> 
> def leniter(iterator):
>     if hasattr(iterator, "__len__"):
>         return len(iterator)
>     nelements = 0
>     for _ in iterator:
>         nelements += 1
>     return nelements
> 
Of course this is a little like the Heisenberg uncertainty principle if 
the iterator has no __len__ attribute - once you know how long it is you 
no longer have access to the elements. Or did I miss something?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From bdesth.quelquechose at free.quelquepart.fr  Thu Mar 15 18:38:33 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 15 Mar 2007 23:38:33 +0100
Subject: os.path.isfile with *.tar.gz
In-Reply-To: <mailman.5145.1173988228.32031.python-list@python.org>
References: <09042D621CD4AA479C678463F3A646D0E87D10@sottemail1.ent.ad.cognos.com>
	<mailman.5145.1173988228.32031.python-list@python.org>
Message-ID: <45f9c2a4$0$15537$426a74cc@news.free.fr>

> Boudreau, Emile wrote:
(snip)
>> I have tried variations of: os.path.isfile( os.path.join("C:\\temp\\", 
>> "rqp-win32-app", "*.tar.gz"))

As a side note, the whole point of os.path is to help writing portable 
code. So passing an os.specific path componant is somewhat counter 
productive !-)

(snip answer)



From gagsl-py2 at yahoo.com.ar  Sun Mar 11 13:42:13 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 14:42:13 -0300
Subject: threading and iterator crashing interpreter
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
	<1173617253.901671.136910@q40g2000cwq.googlegroups.com>
	<mailman.4939.1173619757.32031.python-list@python.org>
	<1173623758.054666.18190@s48g2000cws.googlegroups.com>
Message-ID: <op.to1csnw9x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 11:35:58 -0300, Janto Dreijer <jantod at gmail.com>  
escribi?:

>> At least, the problem of using the same generator from different threads
>> still remains, if you don't use my modified code. In general, when using
>> multiple threads you always need some way to syncronize access to shared
>> objects. You are lucky with Sessions because append is an atomic  
>> operation
>> on lists; for more information see   
>> http://effbot.org/pyfaq/what-kinds-of-global-value-mutation-are-threa...
>
> Again you're right. But even putting a try-except:return around the
> random.choice still manages to break the interpreter. I'm not looking
> for any meaningful output really. I just want it not to break.

A try/except won't help a concurrency problem, unfortunately.

> Like I said, this is just watered down code to try and isolate the
> problem.

So I suggest to start with some small, *correct*, code, and then add more  
features until you reconstruct your big program in a safe way.

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 05:20:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 07:20:36 -0300
Subject: property syntax
References: <1173346452.096798.215970@t69g2000cwt.googlegroups.com>
Message-ID: <op.tou8cmqhx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 06:34:12 -0300, <bearophileHUGS at lycos.com> escribi?:

> Probably you have already discussed this topic, but maybe you can
> stand touching it again briefly.
> Maybe properties aren't used so often to deserve a specific syntax,
> but I don't like their syntax much. Here I show some alternative
> solutions that work with the current Python, followed by a syntax
> idea, that may be better fit for Python 3.0 (but maybe changing its
> name it can be retrofitted into Python 2.6 too).

You miss this common way, that does not depend on metaclasses, nor base  
classes, nor custom decorators... The only drawback is the "deprecated"  
status of apply:

class Angle(object):

    @apply
    def rad():
      doc = "The angle in radians"
      def fget(self):
        return self._rad
      def fset(self, value):
        self._rad = value
      return property(**locals())


(Hmmm... I wonder what the 2to3 conversion tool is doing in this case?)

-- 
Gabriel Genellina



From inq1ltd at verizon.net  Fri Mar 16 17:55:58 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 16 Mar 2007 17:55:58 -0400
Subject: SQLite3, data not found
Message-ID: <200703161755.58549.inq1ltd@verizon.net>


Python help,

I just started working with SQLite3 and ran into 
this problem.

Below, the first select produces results but, 
after closing then re-opening the database the 
select produces an empty list.  Anyone know the 
reason ??

The table seems to be empty.

  

import sqlite3
con = sqlite3.connect('myData')
cursor = con.cursor()

cursor.execute ("""create table data
                       (recordNo varchar,
                       caseNo varchar)""");

record = ['A', 'B']

cursor.execute("insert into data values (?,?)",  
record ) ;

cursor.execute("select * from data ");
print cursor.fetchall(); 
con.close()

con = sqlite3.connect('myData')
cursor = con.cursor()
cursor.execute("select * from data");
print cursor.fetchall(); 


jim-on-linux


From steve at REMOVEME.cybersource.com.au  Wed Mar  7 22:43:47 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Thu, 08 Mar 2007 14:43:47 +1100
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
Message-ID: <pan.2007.03.08.03.43.46.854394@REMOVEME.cybersource.com.au>

On Wed, 07 Mar 2007 10:32:53 -0800, Arnaud Delobelle wrote:

> Hi all,
> 
> Imagine I have three functions a(x), b(x), c(x) that each return
> something or raise an exception.  Imagine I want to define a function
> that returns a(x) if possible, otherwise b(x), otherwise c(x),
> otherwise raise CantDoIt.
> 
> Here are three ways I can think of doing it:
> 
> ----------
> # This one looks ugly
> def nested_first(x):
>     try:
>         return a(x)
>     except:
>         try:
>             return b(x)
>         except:
>             try:
>                 return c(x)
>             except:
>                 raise CantDoIt


Exceptions are great, but sometimes they get in the way. This is one of
those times.

NULL = object() # get a unique value
def result_or_special(func, x):
    """Returns the result of func(x) or NULL."""
    try:
        return func(x)
    except Exception:
        return NULL

def failer(x):
    """Always fail."""
    raise CantDoIt

def function(x):
    funcs = (a, b, c, failer)
    for func in funcs:
        result = func(x)
        if result is not NULL: break
    return result


Or if you prefer:

def function(x):
    NULL = object()
    funcs = (a, b, c)
    for func in funcs:
        try:
            result = func(x)
        except Exception:
            pass
        else:
            break
    else:
        # we didn't break out of the loop
        raise CantDoIt
    # we did break out of the loop
    return result



-- 
Steven D'Aprano 



From gagsl-py2 at yahoo.com.ar  Fri Mar 23 01:13:36 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 02:13:36 -0300
Subject: #!/usr/bin/env python > 2.4?
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<4Rf*J7eGr@news.chiark.greenend.org.uk>
	<slrnf02rkt.4ef.jon+usenet@snowy.squish.net>
Message-ID: <op.tpml4ysmx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 14:42:53 -0300, Jon Ribbens  
<jon+usenet at unequivocal.co.uk> escribi?:

> In article <4Rf*J7eGr at news.chiark.greenend.org.uk>, Sion Arrowsmith  
> wrote:
>> Jon Ribbens  <jon+usenet at unequivocal.co.uk> wrote:
>>>  if sys.hexversion < 0x020400f0:
>>>    ... error ...
>>
>> "Readability counts."
>>
>> if sys.version_info < (2, 4):
>>     ... error ...
>
> Maybe you should suggest a patch to the Python documentation then ;-)
>
> The formula I mentioned is the one suggested in the official Python
> documentation ( http://docs.python.org/lib/module-sys.html#l2h-5143 )
> as being the way to check the Python version.

Uh... I never thought it was an implied formula there - that F0 had to  
come from 1.5 = 15 = 0xF.
I think it should be stated much more clearly.

-- 
Gabriel Genellina



From AWasilenko at gmail.com  Thu Mar 22 23:53:15 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 22 Mar 2007 20:53:15 -0700
Subject: Printing from a text file quirk
In-Reply-To: <1174620861.374740.203670@l75g2000hse.googlegroups.com>
References: <1174620861.374740.203670@l75g2000hse.googlegroups.com>
Message-ID: <1174621995.759439.63770@n59g2000hsh.googlegroups.com>

Humm I think I messed up the code before I pasted it, I am now able to
get the left tag on the same line with this:

headerp1 = ""
for i in range(5):
	headerp1 += self.headertxt.readline()
headerp2 = self.headertxt.readline(7)
headerp3 = self.headertxt.readline()
headerp4 = self.headertxt.read()
return headerp1 + headerp2 + pagetitle + headerp3 + headerp4

output:
<title>this is a new title
</title>

Now all's left is the </title> tag to get on the same line, or a
better solution, this seems like a very awkward way to do what I want.



From steve at holdenweb.com  Mon Mar 19 14:05:13 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 14:05:13 -0400
Subject: PythonCard or Dabo?
In-Reply-To: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
References: <b1d18$45fec76a$4275d90a$11786@FUSE.NET>
Message-ID: <etmjfc$29m$2@sea.gmane.org>

Kevin Walzer wrote:
> I'm curious to know what others think of these two frameworks for 
> building wxPython apps.
> 
> PythonCard has been around longer, but its development seems to have 
> slowed. The last release, 0.8.2, has been out for quite awhile now.
> 
> Dabo is newer and seems to have gathered a lot of buzz.
> 
> Anyone try both? What's your preference and why? Is one more robust than 
> the other?
> 
It's not just a matter of robustness. PythonCard is limited to GUI 
development, while Dabo is a fully-fledged application architecture 
intended to allow you to build complete suites. So not only does it have 
a superior GUI editor, it also has report development facilities and 
many other features that simply weren't envisaged for PythonCard.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From danb_83 at yahoo.com  Thu Mar 15 20:52:10 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 15 Mar 2007 17:52:10 -0700
Subject: newb: Python Floating Point
In-Reply-To: <1174003795.849903.273220@l75g2000hse.googlegroups.com>
References: <1174003795.849903.273220@l75g2000hse.googlegroups.com>
Message-ID: <1174006330.730006.30530@n59g2000hsh.googlegroups.com>

On Mar 15, 6:09 pm, "johnny" <rampet... at gmail.com> wrote:
> When I do the following, rounding to 2 decimal places doesn't seem to
> work.  I should get 0.99 :

In binary, 0.99 is the recurring fraction 0.11 11110101110000101000
11110101110000101000 11110101110000101000 ....  Thus, it can't be
exactly represented as a float.



From siona at chiark.greenend.org.uk  Fri Mar 16 13:07:30 2007
From: siona at chiark.greenend.org.uk (Sion Arrowsmith)
Date: 16 Mar 2007 17:07:30 +0000 (GMT)
Subject: Eureka moments in Python
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
	<1174053730.543334.138910@n59g2000hsh.googlegroups.com>
Message-ID: <+tk*0oRFr@news.chiark.greenend.org.uk>

Paul McGuire <ptmcg at austin.rr.com> wrote:
>On Mar 13, 2:16 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
>wrote:
>> I'd be interested in hearing people's stories of Eureka moments in Python,
>> moments where you suddenly realise that some task which seemed like it
>> would be hard work was easy with Python.
>The day I wrote a CORBA method intercepter in 8 lines of code [ ... ]

This is more a "batteries included" eureka moment than a Python one,
but writing a fetchmail substitute in 6 lines was an eye-opener.

-- 
\S -- siona at chiark.greenend.org.uk -- http://www.chaos.org.uk/~sion/
  ___  |  "Frankly I have no feelings towards penguins one way or the other"
  \X/  |    -- Arthur C. Clarke
   her nu become? se bera eadward ofdun hl?ddre heafdes b?ce bump bump bump


From kyosohma at gmail.com  Mon Mar 26 13:34:21 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 10:34:21 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174926951.133085.294900@l75g2000hse.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
	<1174926951.133085.294900@l75g2000hse.googlegroups.com>
Message-ID: <1174930461.108420.219960@d57g2000hsg.googlegroups.com>

On Mar 26, 11:35 am, "jp" <johnpe... at yahoo.com> wrote:
> On Mar 26, 11:27 am, kyoso... at gmail.com wrote:> On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
>
> > > On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > > > I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> > > > I skip over these widgets when using the tab key?
>
> > > > Thank you,
> > > > John
>
> > > I would probably write some custom event handling. Something that
> > > could tell it was a key-press event and not just an on-focus event.
> > > Then it would be a simple, if key-press == tab, put focus on next
>
> #> > widget of interest. Something like that should work.
>
>
>
> > > Mike
>
> > I looked in my Tkinter book, and it says that if the widget has the
> > "takefocus" option set to true, the widget is placed in the tab group
> > and will get focus when they are tabbed to. I assume that this means
> > if you set the PMW widgets' "takefocus" option to false, they will be
> > skipped over since they won't be in the tab group.
>
> > Mike
>
> I've tried using the takefocus option set to 0 and 1 but either way,
> the tab key still stops at my EntryField.  Below is my snippet of
> code.  What am I doing wrong?
>
> entry=Pmw.EntryField(frame,
>                      labelpos = 'w',
>                      value = "",
>                      label_text =
> 'Name:')
> entry.grid(row=1)
> #entry.component('entry').takefocus = 1
> entry.component('entry').takefocus = 0

According to the Tkinter book, setting takefocus to 0 (false) should
work. Are you putting th EntryField into a Grid? If so, that might be
the problem. I suppose the grid may override its children's settings.

I've never messed too much with skipping widgets in the tab order. You
could pack the PMW widgets last so that they won't get tabbed to until
the end.

There's also tk_focusNext & tk_focusPrev. See the following post for
more info and ideas:

http://www.dbforums.com/archive/index.php/t-1377788.html

Mike



From bthom at cs.hmc.edu  Fri Mar 23 20:04:58 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Fri, 23 Mar 2007 17:04:58 -0700
Subject: exit to interpreter?
In-Reply-To: <1174679289.267429.18000@l77g2000hsb.googlegroups.com>
References: <mailman.5522.1174672336.32031.python-list@python.org>
	<1174673079.976162.307960@n76g2000hsh.googlegroups.com>
	<mailman.5523.1174674034.32031.python-list@python.org>
	<1174679289.267429.18000@l77g2000hsb.googlegroups.com>
Message-ID: <A5ADACB8-2DB3-4AC8-9052-A5D4C44DEACE@cs.hmc.edu>

Thanks to all. I had suspected this was the best way to go, but as  
I'm fairly new to Python, it seemed worth a check.

--b

On Mar 23, 2007, at 12:48 PM, kyosohma at gmail.com wrote:

> On Mar 23, 1:20 pm, belinda thom <b... at cs.hmc.edu> wrote:
>> On Mar 23, 2007, at 11:04 AM, kyoso... at gmail.com wrote:
>>
>>
>>
>>> On Mar 23, 12:52 pm, belinda thom <b... at cs.hmc.edu> wrote:
>>>> Hi,
>>
>>>> I'm writing a function that polls the user for keyboard input,
>>>> looping until it has determined that the user has entered a valid
>>>> string of characters, in which case it returns that string so it  
>>>> can
>>>> be processed up the call stack. My problem is this. I'd also  
>>>> like it
>>>> to handle a special string (e.g. 'quit'), in which case control
>>>> should return to the Python command line as opposed to returning  
>>>> the
>>>> string up the call stack.
>>
>>>> sys.exit seemed like a good choice, but it exits the python
>>>> interpreter.
>>
>>>> I could use an exception for this purpose, but was wondering if
>>>> there's a better way?
>>
>>>> --b
>>
>>> If you're using a function, wouldn't using the keyword "return"  
>>> work?
>>
>>> Mike
>>
>> No, because that just returns to the caller, which is not the Python
>> interpreter.
>
> Sorry...I didn't realize you were calling from another function or
> functions. Duh. I agree with the other writer. Use a custom exception.
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From nobody at invalid.com  Mon Mar 12 12:56:30 2007
From: nobody at invalid.com (Erik Johnson)
Date: Mon, 12 Mar 2007 09:56:30 -0700
Subject: Newbie Question : "grep"
References: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
Message-ID: <45f5864f$1@nntp.zianet.com>


<moogyd at yahoo.co.uk> wrote in message
news:1173714587.830723.59210 at 8g2000cwh.googlegroups.com...
<snip>
> - If I increase number of elements I am searching for, then I have
> more elif...elif. Is there a cleaner solution?

I'm not sure exactly what your lines look like, but this script implies that
every line that matches 'i_a/i_b/ROM' is one of the known list you are
looking for. Maybe that's exactly right...

Below is some code that I think is an incremental improvement over writing
lots of alternative if-statements.
I beleive it has the same behaviour, though it is totally untested:

tags = [
    ['B18', (7, 6)],
    ['B14', (5, 4)],
    ['B10', (3, 2)],
    ['B6',  (1, 0)],
]

for line in lines:
    if "placed" in line:
        if "i_a/i_b/ROM/" in line:
            pos = (line.split()[4]).split("_")[1]
            found = False
            for (tag, (start, end)) in tags:
                if tag in line:
                    found = True
                    print "        i_a/i_b/ROM/%s [%i:%i] LOC =" %\
                        (pos, tag, start, end)
                    break

    This way, you just need to maintain your data structure (tags), instead
of writing lots of repettitive code.
If there is a definite pattern to the part that looks like a slice (what I
am calling (start, end)), then you could
programmatically generate that as well, of course.

    The list of things you are looking for could be in a separate file, etc.
The sensible thing to do sort of depends on how big this list of stuff you
are looking for is going to grow and how much you are going to use this
program. Do what makes sense for you.

    You may want to explore the 're' module as well (regular expressions)
http://docs.python.org/modindex.html , which may or may not improve
performance, readability, maintainability, etc.

See also section 10.10 of the Python Tutorial if you are interested in code
performance issues: http://docs.python.org/tut/tut.html

Hope that helps,
-ej




From nospam at nospam.com  Thu Mar 22 00:09:52 2007
From: nospam at nospam.com (Mark T)
Date: Wed, 21 Mar 2007 21:09:52 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
Message-ID: <sM-dnd6b-MwTnJ_bnZ2dnUVZ_oednZ2d@comcast.com>


"Marcin Ciura" <marcin.ciura at poczta.NOSPAMonet.pl> wrote in message 
news:ets9hc$74f$1 at news.onet.pl...
> Given
>   class Node(object):
>       pass
>
>   node = Node()
>   nextnode = Node()
>
> I tried to refactor the following piece of code
>   node.next = nextnode
>   node = nextnode

You have an error above.  The first node's "next" points to nextnode, then 
node is reassigned to point to nextnode, losing the original node!
The refactoring below is doing the same thing.  It is, however, evaluating 
right-to-left as you want.  nextnode is place in node.next and placed in 
node, also losing the original value of node.

-Mark T.

>
> as
>   node = node.next = nextnode
>
> only to discover that Python performs chained assignments
> backwards compared to other languages, i.e. left-to-right
> instead of right-to-left. From the user's perspective,
> I can't think of any reasonable argument for keeping it
> this way in Python 3000. What is your opinion?
>   Marcin



From nagle at animats.com  Sat Mar 10 12:40:17 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 10 Mar 2007 17:40:17 GMT
Subject: Database module & multithreading
In-Reply-To: <mailman.4904.1173539770.32031.python-list@python.org>
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
Message-ID: <54CIh.6545$M65.2077@newssvr21.news.prodigy.net>

Michael Bentley wrote:
>>
>> Thanx for this pointer buddy! I have done my homework. Some Database
>> modules are not actively maintained some modules  does not work with
>> Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
>> it dosent allow me to use multi threading so which database module is
>> better in terms of multithreading
> 
> 
> Actually, I think sqlite3 just requires that each thread have its own  
> connection and cursor.

     SQlite is thread-safe but not concurrent; only one thread
at a time can be doing database updates to a database.  The whole
database is locked during each transaction that changes the database.
However, multiple reads (SELECTs) can be done simultaneously.  So
mostly-read databases can still get some concurrency going.

     The question is, how many transactions per second do you
need to process?  This sounds like someone writing their first
database program, not someone who needs thousands of transactions
per second and has a farm of dedicated servers to support them.
Any of the usual choices should work: SQLite, MySQL, or Postgres.

     As for "some modules not being maintained", it really is sad
that MySQLdb is kind of behind.  If you're running Windows and need
MySQL, you're either stuck with Python 2.4, or have to get a 2.5 version
from a World of Warcraft guild.  The source version of MySQLdb, though,
does build properly on Red Hat Fedora Core 6 for Python 2.5.

				John Nagle


From http  Sat Mar 10 19:02:56 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 16:02:56 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<DThIh.10892$tD2.3813@newsread1.news.pas.earthlink.net>
	<pan.2007.03.10.13.45.29.402878@REMOVE.THIS.cybersource.com.au>
	<7xr6rxkqp6.fsf@ruckus.brouhaha.com>
	<pan.2007.03.10.23.53.01.619207@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xwt1or6j3.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> > By your method, what is the probability of the first number being
> > higher than 30?  What is the probability of the fifth number being
> > higher than 30?  If these probabilities are unequal, can we really say
> > the sequences are random?
> 
> Of course we can! "Uniform probability distribution" is a special case of
> random. Most random quantities are far from uniform. The Python random
> module includes a couple of non-uniform distributions, including
> exponential distribution (random.expovariate) and the famous bell curve
> distribution (random.normalvariate).

Ehh.  Say we call some generator repeatedly and get back the sequence
(3, 3, 3, 3, 3, ...).  Would we say this is a random sequence using a
distribution that puts 100% of the probability density at 3?  Or would
we just say it isn't random?

For something like this partition problem, describing some generator
as making a random partition should contain some reasonable
description of the distribution.  For example, we could say the
generator selects one of the P(n) possible partitions with equal
probability.  For another, we could say it uses the "fencepost" method
and the distribution is whatever results from that.  Question then is
whether those two distributions are the same.


From michael at jedimindworks.com  Sat Mar 24 22:18:03 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sat, 24 Mar 2007 21:18:03 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <60B634CE-C9C1-46DE-8CE2-263C6AD13F53@jedimindworks.com>

On Mar 24, 2007, at 12:30 PM, Robert Hicks wrote:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.

Don't uninstall it.

That's why Apple put python under /Library/Frameworks/ 
Python.framework/Versions.  So you can have multiple versions installed.

Hopefully you left Apple's default install of 2.3.5 unmolested as  
well.  My best advise is to download the binaries from python.org and  
install.  This gives you a nice universal framework build, compete  
with readline support.

If you do elect to build it yourself, just make sure to read the Mac  
specific documentation (which tells how to generate a framework  
build).  Whichever route you take, /usr/local/bin/python and /Library/ 
Frameworks/Python.framework/Versions/Current/bin/python will point to  
pyhon2.5.  Since you already have 2.4x I assume your path already  
contains /usr/local/bin -- otherwise, you'll probably keep picking up  
the default 2.3.5 in /usr/bin.

It looks like Stackless has a Mac binary install as well.  Does  
anybody here know if I can install that on top of a stock 2.5 without  
breaking things?

regards,
Michael

---
Simplicity is the ultimate sophistication.
                                                   -Leonardo da Vinci





From paul at boddie.org.uk  Wed Mar 28 09:12:35 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 28 Mar 2007 06:12:35 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <1175083955.167868.88610@n76g2000hsh.googlegroups.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
Message-ID: <1175087555.252611.66470@p15g2000hsd.googlegroups.com>

On 28 Mar, 14:12, "Kay Schluehr" <kay.schlu... at gmx.net> wrote:
>
> A somewhat unrelated question. With Py3K Python gets optional type
> annotations.

No, I believe the consensus is that Python 3000 gets optional
annotations which aren't specifically for type information... nudge
nudge, wink wink! That last part is important, because that's also how
many other people have interpreted this particular feature. I seem to
recall that some of the PyPy people weren't interested in static
analysis [1], so I'm skeptical about whether type annotations are
their kind of thing, either. That said, I imagine that the handling of
metadata (including type details) is an element in the way RPython
works, but I also imagine that things get more complicated as such
metadata diverges from plain type information and into arbitrary
"observations" about other aspects of program behaviour.

Still, I'd like to see the PyPy people stick their necks out and
answer your questions. ;-)

Paul

[1] http://codespeak.net/pipermail/pypy-dev/2007q1/003607.html



From hg at nospam.org  Tue Mar 13 16:20:02 2007
From: hg at nospam.org (hg)
Date: Tue, 13 Mar 2007 21:20:02 +0100
Subject: Problem I have with a while loop/boolean/or
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
	<EWIJh.6070$Ng1.5147@newsfe19.lga>
Message-ID: <EYIJh.6073$Ng1.5502@newsfe19.lga>

hg wrote:

> israphelr at googlemail.com wrote:
> 
>> Hi all.
>> 
>> I have a problem with some code :(
>> 
>> -----------
>> 
>> hint = raw_input("\nAre you stuck? y/n: ")
>> hint = hint.lower()
>> 
>> while (hint != 'n') or (hint != 'y'):
>>     hint = raw_input("Please specify a valid choice: ")
>> 
>> ---------------------------------------------
>> 
>> so everytime I run the program, and enter my choice as y or n, I'm
>> told to 'Please Specify a valid Choice Again' and can't get out of the
>> loop.
>> 
>> 
>> 
>> -----------
>> 
>> hint = raw_input("\nAre you stuck? y/n: ")
>> hint = hint.lower()
>> 
>> while (hint != 'n'):
>>     hint = raw_input("Please specify a valid choice: ")
>> 
>> ---------------------------------------------
>> 
>> As for here when I enter n, I can leave the while loop.
>> 
>> Anyway I can't put my finger on this, so I'd be real grateful if
>> someone could tell me what I've done wrong. Thanks.
>> (I have a guy feeling it's something really silly I'm overlooking...)
> 
> Hi,
> 
> Whatever hint is:
> (hint != 'n') or (hint != 'y')
> is always going to be true
> 
> as it cannot really be both at the same time
> 
> use "and" instead of "or"
> 
> hg


oops, meant to answer to the main post



From bytecolor at yahoo.com  Mon Mar  5 01:56:13 2007
From: bytecolor at yahoo.com (bytecolor)
Date: 4 Mar 2007 22:56:13 -0800
Subject: package_data question
Message-ID: <1173077773.569831.249980@t69g2000cwt.googlegroups.com>

I have a simple package. I'm trying to add an examples subdirectory
with distutils. I'm using Python 2.4 on Linux. My file layout and
setup.py can be found here:

http://www.deadbeefbabe.org/paste/3870

I've tried using data_files as well, with the same result; examples/
fig2.3.apt is not added to the tarball.

--
bytecolor



From mccredie at gmail.com  Fri Mar 16 14:20:08 2007
From: mccredie at gmail.com (Matimus)
Date: 16 Mar 2007 11:20:08 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
Message-ID: <1174069208.088356.289020@d57g2000hsg.googlegroups.com>

You might look at the bisect module (part of the standard
distribution).



From sgeiger at ncee.net  Fri Mar 30 13:44:22 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Fri, 30 Mar 2007 12:44:22 -0500
Subject: clean up html document created by Word
In-Reply-To: <1175276233.762698.105550@n59g2000hsh.googlegroups.com>
References: <1175275249.200620.76590@o5g2000hsb.googlegroups.com>	<eujhd8$sh0$02$1@news.t-online.com>
	<1175276233.762698.105550@n59g2000hsh.googlegroups.com>
Message-ID: <460D4C76.2000104@ncee.net>

Tidy can now perform wonders on HTML saved from Microsoft Word 2000! 
Word bulks out HTML files with stuff for round-tripping presentation 
between HTML and Word. If you are more concerned about using HTML on the 
Web, check out Tidy's "Word-2000" 
<http://www.w3.org/People/Raggett/tidy/#word2000> config option! Of 
course Tidy does a good job on Word'97 files as well!
   -- source:  http://www.w3.org/People/Raggett/tidy/



jkn wrote:
> IIUC, the original poster is asking about 'cleaning up' in the sense
> of removing the swathes of unnecessary and/or redundant 'cruft' that
> Word puts in there, rather than making valid HTML out of invalid HTML.
> Again, IIUC, HTMLtidy does not do this.
>
> If Beautiful Soup does, then I'm intererested!
>
>     jon N
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From aahz at pythoncraft.com  Wed Mar 14 16:44:33 2007
From: aahz at pythoncraft.com (Aahz)
Date: 14 Mar 2007 13:44:33 -0700
Subject: is it possible to give an instance a value?
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
	<45edfb62$0$28523$426a74cc@news.free.fr>
Message-ID: <et9mrh$md$1@panix3.panix.com>

In article <45edfb62$0$28523$426a74cc at news.free.fr>,
Bruno Desthuilliers  <bdesth.quelquechose at free.quelquepart.fr> wrote:
>manstey a ?crit :
>> 
>> Is there a way to make a have the value a.val
>
>Forget about the value/instance distinction - it doesn't exists in Python.

Actually, I think it does.  For example, int('123') has the value 123.
The way I would put it, any type/class that has an eval()able
representation has a value.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar 19 16:06:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 21:06:05 +0100
Subject: Private data
In-Reply-To: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
Message-ID: <45fee4c2$0$4541$426a34cc@news.free.fr>

Dustan a ?crit :
> http://dustangroups.googlepages.com/privateattributesinpython
> 

May I report a small typo ?

"""
     def interanalDataDecorator(func):
"""

Talking about private attributes... !-)


From nanjundi at gmail.com  Mon Mar 12 17:48:08 2007
From: nanjundi at gmail.com (Nanjundi)
Date: 12 Mar 2007 14:48:08 -0700
Subject: New to Python
In-Reply-To: <1173689360.138935.6780@j27g2000cwj.googlegroups.com>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<1173689360.138935.6780@j27g2000cwj.googlegroups.com>
Message-ID: <1173736088.103408.84180@v33g2000cwv.googlegroups.com>

On Mar 12, 4:49 am, "Bert Heymans" <bert.heym... at gmail.com> wrote:
> On Mar 12, 3:02 am, Alberto Vieira Ferreira Monteiro
>
> <albm... at centroin.com.br> wrote:
> > Hi, I am new to Python, how stupid can be the questions I ask?
>
> > For example, how can I add (mathematically) two tuples?
> > x = (1,2)
> > y = (3,4)
> > How can I get z = (1 + 3, 2 + 4) ?
>
> > Alberto Monteiro
>
> Alberto -
>
> List comprehesion, no doubt about it:>>> z = [k+p for k,p in (x, y)]

To put the correct form of the soulution here.
This will give the desired output z = [k+p for k,p in zip(x, y)]
Or z = [k+p for k,p in map(None, x, y)]
>>> z
[4, 6]

-N



From trentm at activestate.com  Tue Mar 13 16:47:34 2007
From: trentm at activestate.com (Trent Mick)
Date: Tue, 13 Mar 2007 13:47:34 -0700
Subject: ActivePython 2.5.0.0 is now available
In-Reply-To: <55ofh7F25cn50U1@mid.individual.net>
References: <mailman.5030.1173815941.32031.python-list@python.org>
	<55ofh7F25cn50U1@mid.individual.net>
Message-ID: <45F70DE6.8000505@activestate.com>

Bror Johansson wrote:
> I did notice the download earlier today and I have installed it on five 
> Windows-machines (two WinXPPro and three Win2K) and have found one 
> consistent error.
> 
> Whenever I try Help->Python Manuals from PythonWin I get this errormessage:
> 
>     "Internal error in help file processing <class 'pywintypes.error'>:(2, 
> 'ShellExecute', 'Det g?r inte att hitta filen.')
> 
> The last few words are swedish (the machine I'm using right here is arunning 
> a swedish WinXP) and has this meaning: "It's not possible to find the file".
> 
> Is there a remedy for this problem?

http://bugs.activestate.com/show_bug.cgi?id=68029

I don't currently have a work around for it. I should be able to fix this for 
the next release (but don't have a date for that yet). You could CC yourself 
to that bug report to get a notification for when it is fixed, if you like.

Thanks,
Trent

-- 
Trent Mick
trentm at activestate.com


From mandus at gmail.com  Fri Mar  9 09:00:26 2007
From: mandus at gmail.com (Mandus)
Date: Fri, 9 Mar 2007 14:00:26 +0000 (UTC)
Subject: C++ and Python
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
Message-ID: <slrnev2q3q.cis.mandus@oro.simula.no>

8 Mar 2007 22:04:48 -0800 skrev bressert at gmail.com:
> Hi Everyone,
>
> I'm considering about generating some Python Bindings for C++
> libraries. What are considered the best tools for doing something like
> this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.

We are doing this quite extensively at work, and have found that in the
long run SWIG is the best solution. OMMV, but if you ask me, the answer
is SWIG. 

mvh,
-- 
Mandus - the only mandus around.


From tiedon_jano at hotmail.com  Tue Mar  6 08:30:20 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 06 Mar 2007 13:30:20 GMT
Subject: askstring Window to the top under Windows
In-Reply-To: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
Message-ID: <M1eHh.133$c62.114@read3.inet.fi>

iwl kirjoitti:
> Hi,
> 
> I tryed askstring to input some text in my script,
> but some ugly empty Window appears with the
> Input-Window behind and all together behind my
> Console showing my script. So all have to brought
> to the top first by the user - very unconfortable
> 

Are you asking about the function AskString in the EasyDialogs module of 
Macintosh?

If so, I can't help you.

I'm just confused because the subject of your post contains the word 
Windows which could mean Microsoft Windows on which Python hasn't the 
EasyDialogs module.

Cheers,
Jussi


From a.schmolck at gmail.com  Tue Mar  6 08:52:06 2007
From: a.schmolck at gmail.com (Alexander Schmolck)
Date: 06 Mar 2007 13:52:06 +0000
Subject: Try to get help on pymat
References: <mailman.4710.1173182294.32031.python-list@python.org>
Message-ID: <yfsy7maa395.fsf@oc.ex.ac.uk>

"CHRIS CHEW" <chris9883 at msn.com> writes:

> I am trying to get my pymat to work. The Python script did not interface to
> matlab yet. What are the required script to get the interface to work? Please
> send me email at chris9883 at msn.com

You might want to have a look at <http://mlabwrap.sf.net>.

cheers,

'as


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Mar 26 18:27:26 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Tue, 27 Mar 2007 00:27:26 +0200
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
	<mailman.5633.1174921823.32031.python-list@python.org>
Message-ID: <56qvmeF29ud19U1@mid.individual.net>

Matt Garman wrote:

> In my case, I know my input data doesn't have any blank lines.

8)

I work with a (not self-written) perl script that does funny things
with blank lines in input files. Yeah, blank lines "aren't supposed
to" be in the input data ...

> However, I'm glad you (and others) clarified the issue, because I
> wasn't aware of the better methods for checking for EOF.

The principle was okay (to check if the string is totally empty). I
always used readlines so far and didn't have the problem.
 
> Thanks to all for your input and suggestions.  I received many
> more responses than I expected!

You're welcome. :)

Regards,


Bj?rn

-- 
BOFH excuse #374:

It's the InterNIC's fault.



From justin.mailinglists at gmail.com  Thu Mar 29 06:24:08 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 29 Mar 2007 03:24:08 -0700
Subject: BeautifulSoup vs. Microsoft
In-Reply-To: <1175163104.054405.28190@d57g2000hsg.googlegroups.com>
References: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
	<Xns99025B6FD25CFduncanbooth@127.0.0.1>
	<1175163104.054405.28190@d57g2000hsg.googlegroups.com>
Message-ID: <1175163848.584005.88100@y66g2000hsf.googlegroups.com>

On Mar 29, 6:11 pm, "Justin Ezequiel" <justin.mailingli... at gmail.com>
wrote:
>
> FWIW, seehttp://tinyurl.com/yjtzjz
>

hmm. not quite right.

http://tinyurl.com/ynv4ct

or

http://www.crummy.com/software/BeautifulSoup/documentation.html#Customizing%20the%20Parser



From __peter__ at web.de  Wed Mar 21 16:35:29 2007
From: __peter__ at web.de (Peter Otten)
Date: Wed, 21 Mar 2007 21:35:29 +0100
Subject: Printing __doc__
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
Message-ID: <ets4qe$i0i$00$1@news.t-online.com>

gtb wrote:

> In a function I can use the statement n =
> sys._getframe().f_code.co_name to get the name of the current
> function. Given that I can get the name how can I print the __doc__
> string? I cant use the following, it will tell me to bugger off as the
> string has no such attribute.
> 
> def spam(self):
>     n = sys._getframe().f_code.co_name
>     print n.__doc__      #Wrong
>     print __doc__         #No good either
>     #....

>>> import sys
>>> def docstring():
...     return sys._getframe(1).f_code.co_consts[0]
...
>>> def foo():
...     print "My docstring is %r" % docstring()
...
>>> def bar():
...     "bar's docstring"
...     print "My docstring is %r" % docstring()
...
>>> foo()
My docstring is None
>>> bar()
My docstring is "bar's docstring"

No idea how brittle that might be, though.

Peter


From openopt at ukr.net  Wed Mar 21 10:38:00 2007
From: openopt at ukr.net (dmitrey)
Date: 21 Mar 2007 07:38:00 -0700
Subject: why brackets & commas in func calls can't be ommited? (maybe it could
	be PEP?)
Message-ID: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>

Hi all,
I looked to the PEPs & didn't find a proposition to remove brackets &
commas for to make Python func call syntax caml- or tcl- like: instead
of
result = myfun(param1, myfun2(param5, param8), param3)
just make possible using
result =  myfun param1 (myfun2 param5 param8) param3

it would reduce length of code lines and make them more readable, + no
needs to write annoing charecters.
Maybe it will require more work than I suppose, for example handling
of things like
result = myfun(param1, myfun2(param5, param8), param3=15, param4=200)
to
result =  myfun param1 (myfun2 param5 param8) param3=15 param4=200 #so
it needs some more efforts to decode by compiler

but anyway I think it worth.
+ it will not yield incompabilities with previous Python versions.

WBR, D.



From arnodel at googlemail.com  Mon Mar  5 13:59:02 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 5 Mar 2007 10:59:02 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173105492.632821.326810@n33g2000cwc.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
	<1173105492.632821.326810@n33g2000cwc.googlegroups.com>
Message-ID: <1173121140.087027.214600@h3g2000cwc.googlegroups.com>

On 5 Mar, 14:38, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
> On 5 Mar, 07:31, "Raymond Hettinger" <pyt... at rcn.com> wrote:
>
> > I had an idea but no time to think it through.
> > Perhaps the under-under name mangling trick
> > can be replaced (in Py3.0) with a suitably designed decorator.
> > Your challenge is to write the decorator.
> > Any trick in the book (metaclasses, descriptors, etc) is fair game.
>
> I had some time this lunchtimes and I needed to calm my nerves so I
> took up your challenge :)
> Here is my poor effort.  I'm sure lots of things are wrong with it but
> I'm not sure I'll look at it again.

Well in fact I couldn't help but try to improve it a bit. Objects now
don't need a callerclass attribute, instead all necessary info is
stored in a global __callerclass__. Bits that didn't work now do.

So here is my final attempt, promised. The awkward bits are:
    * how to find out where a method is called from
    * how to resume method resolution once it has been established a
local method has to be bypassed, as I don't know how to interfere
directly with mro.

Feedback of any form is welcome (though I prefer when it's polite :)

--------------------
from types import MethodType, FunctionType

class IdDict(object):
    def __init__(self):
        self.objects = {}
    def __getitem__(self, obj):
        return self.objects.get(id(obj), None)
    def __setitem__(self, obj, callerclass):
        self.objects[id(obj)] = callerclass
    def __delitem__(self, obj):
        del self.objects[id(obj)]

# This stores the information about from what class an object is
calling a method
# It is decoupled from the object, better than previous version
# Maybe that makes it easier to use with threads?
__callerclass__ = IdDict()

# The purpose of this class is to update __callerclass__ just before
and after a method is called
class BoundMethod(object):
    def __init__(self, meth, callobj, callerclass):
        self.values = meth, callobj, callerclass
    def __call__(self, *args, **kwargs):
        meth, callobj, callerclass = self.values
        if callobj is None and args:
            callobj = args[0]
        try:
            __callerclass__[callobj] = callerclass
            return meth(*args, **kwargs)
        finally:
            del __callerclass__[callobj]

# A 'normal' method decorator is needed as well
class method(object):
    def __init__(self, f):
        self.f = f
    def __get__(self, obj, objtype=None):
        return BoundMethod(MethodType(self.f, obj, objtype), obj,
self.defclass)

class LocalMethodError(AttributeError):
    pass

# The suggested localmethod decorator
class localmethod(method):
    def __get__(self, obj, objtype=None):
        callobj = obj or objtype
        defclass = self.defclass
        if __callerclass__[callobj] is defclass:
            return MethodType(self.f, obj, objtype)
        else:
            # The caller method is from a different class, so look for
the next candidate.
            mro = iter((obj and type(obj) or objtype).mro())
            for c in mro: # Skip all classes up to the localmethod's
class
                if c == defclass: break
            name = self.name
            for base in mro:
                if name in base.__dict__:
                    try:
                        return base.__dict__[name].__get__(obj,
objtype)
                    except LocalMethodError:
                        continue
        raise LocalMethodError, "localmethod '%s' is not accessible
outside object '%s'" % (self.name, self.defclass.__name__)

class Type(type):
    def __new__(self, name, bases, attrs):
        # decorate all function attributes with 'method'
        for attr, val in attrs.items():
            if type(val) == FunctionType:
                attrs[attr] = method(val)
        return type.__new__(self, name, bases, attrs)
    def __init__(self, name, bases, attrs):
        for attr, val in attrs.iteritems():
            # Inform methods of what class they are created in
            if isinstance(val, method):
                val.defclass = self
            # Inform localmethod of their name (in case they have to
be bypassed)
            if isinstance(val, localmethod):
                val.name = attr

class Object(object):
    __metaclass__ = Type

# Here is your example code

class A(Object):
    @localmethod
    def m(self):
        print 'A.m'
    def am(self):
        self.m()

class B(A):
    @localmethod
    def m(self):
        print 'B.m'
    def bm(self):
        self.m()

m = B()
m.am()     # prints 'A.m'
m.bm()     # prints 'B.m'
# Added:
B.am(m)    # prints 'A.m'
B.bm(m)    # prints 'B.m'
m.m()      # LocalMethodError (which descends from AttributeError)

# Untested beyond this particular example!
--------------------

--
Arnaud




From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 07:50:36 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 25 Mar 2007 21:50:36 +1000
Subject: Strange behavior when printing a returned closure function
References: <1174820392.652008.123550@y80g2000hsf.googlegroups.com>
Message-ID: <pan.2007.03.25.11.50.29.751541@REMOVE.THIS.cybersource.com.au>

On Sun, 25 Mar 2007 03:59:52 -0700, dartsch wrote:


> I get an output like
> 
> <function g at 0x00AFC1F0>
> <function g at 0x00AFC1F0>
> 
> So according to print I get the same function object returned at both
> calls.

Not the same function object. The first object is printed, then deleted
by the garbage collector because it goes out of scope. Then the second one
is created and just happens to end up in the same memory location. That's
an accident of the garbage collector implementation.


> That's surprising, I would expect to get two distinct function objects
> because their func_closure attribute has to be different. And indeed,
> if I do

[snip]

> <function g at 0x00AFC1B0>
> <function g at 0x00AFC1F0>
> 
> ie. two distinct function objects are printed.

This time the first function still exists when the second is created, so
the second naturally can't be in the same memory location.



-- 
Steven.



From dudaraster at gmail.com  Sun Mar  4 12:02:34 2007
From: dudaraster at gmail.com (Aviroce)
Date: Sun, 04 Mar 2007 17:02:34 +0000
Subject: *** CANADIAN ANTI-TERROR LAW HAS BEEN STRUCK DOWN BY ITS
	HONORABLE SUPREME COURT UNANIMOUSLY *** (REPOST)
In-Reply-To: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
References: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
Message-ID: <repost.92105.1172691920.663009.111260@j27g2000cwj.googlegroups.com>

On Feb 24, 11:22 am, stj... at rock.com wrote:
> Canada anti-terror law is struck down>From the Associated Press
>
> February 24, 2007
>
> OTTAWA - Canada's Supreme Court on Friday unanimously declared it
> unconstitutional to detain foreign terrorism suspects indefinitely
> while the courts review their deportation orders.
>
> Five Arab Muslim men have been held for years under the "security
> certificate" program, which the Justice Department has said is a key
> tool in the fight against global terrorism and essential to Canada's
> security.
>
> The court found that the system violated the Charter of Rights and
> Freedoms, Canada's bill of rights. However, it suspended its ruling
> for a year to give Parliament time to rewrite the part of the
> Immigration and Refugee Protection Act that covers the certificate
> process.
>
> The security certificates were challenged by three men from Morocco,
> Syria and Algeria - all alleged by the Canadian Security Intelligence
> Service to have ties to terrorist networks.
>
> The men have spent years in jail while fighting deportation orders.
>
> They risk being labeled terrorists and sent back to their native
> countries, where they say they could face torture.
>
> The court said the treatment of the suspects was a violation of their
> rights.
>
> "The overarching principle of fundamental justice that applies here is
> this: Before the state can detain people for significant periods of
> time, it must accord them a fair judicial process," Chief Justice
> Beverley McLachlin wrote in a ruling for all nine justices.
>
> "The secrecy required by the scheme denies the person named in a
> certificate the opportunity to know the case put against him or her,
> and hence to challenge the government's case," she said.
>
> The challenged law allows sensitive intelligence to be heard behind
> closed doors by a federal judge, with only sketchy summaries given to
> defense attorneys.
>
> The court said the men and their lawyers should have a right to
> respond to the evidence used against them by intelligence agents.
>
> Stockwell Day, the minister of public safety, noted that because the
> ruling does not take effect for a year, the certificates would remain
> in place. He said the government would address the court's ruling "in
> a timely and decisive fashion."
>
> Two of the men are out on bail and remain under house arrest. Three
> others are being held in a federal facility in Ontario.

<<<<<<<<<<<"The court said the treatment of the suspects was a
violation of their
rights.


"The overarching principle of fundamental justice that applies here
is
this: Before the state can detain people for significant periods of
time, it must accord them a fair judicial process," Chief Justice
Beverley McLachlin wrote in a ruling for all nine justices.


"The secrecy required by the scheme denies the person named in a
certificate the opportunity to know the case put against him or her,
and hence to challenge the government's case," she said.
">>>>>>>>>>>>>>>>

THAT IS CALLED PROTECTING CIVIL RIGHTS.  IN THE UNITED STATES OF
AMERICA, WHERE CIVIL RIGHTS ARE PROTECTED BY LAW, FOREIGN SUSPECTS ARE
NOT PROTECTED BY THE GENEVA CONVENTION.  DR. EVIL, V.P. CHENEY, AND
MINI-ME, PRESIDENT BUSH, OPTED TO MODIFY THE GENEVA CONVENTION TO DENY
FOREIGN SUSPECTS DUE PROCESS DEMANDED BY THE CONVENTION.  THIS MEANS
ENEMIES OF THE UNITED STATES OF AMERICA WILL BE DOING JUST THAT TOO.
WHAT IS GOOD FOR THE GOOSE IS GOOD FOR GANDER.










From theller at ctypes.org  Thu Mar 15 13:59:57 2007
From: theller at ctypes.org (Thomas Heller)
Date: Thu, 15 Mar 2007 18:59:57 +0100
Subject: ANN: ActivePython 2.5.0.0 is now available
In-Reply-To: <45F97594.40008@activestate.com>
References: <mailman.5030.1173815941.32031.python-list@python.org>	<1173966133.061395.219360@n76g2000hsh.googlegroups.com>
	<45F97594.40008@activestate.com>
Message-ID: <etc1iu$oqd$1@sea.gmane.org>

Trent Mick schrieb:
> dan.shechter at gmail.com wrote:
>> 
>> is ctypes supported on ActivePython for Windows x64?
>> 
> 
> No.
> http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/whatsincluded.html
> 
> My understanding (from http://www.python.org/sf/1545507) is that ctypes isn't 
> yet ported to Windows/AMD64.  That may have changed though.
> 
> Trent
> 

I have a patch for ctypes for Windows x64.  It cannot be integrated in the
Python SVN repository in the Python 2.5 branch because of the feature freeze,
so Python 2.6 would be the earliest.

I intend to release a separate Win x64 ctypes version soon (my plan is to
release this when Python 2.5.1 will be released, but this is totally
arbitrary); I still have to run more tests with it.

Thomas



From jezonthenet at yahoo.com  Tue Mar 13 00:39:11 2007
From: jezonthenet at yahoo.com (jezonthenet at yahoo.com)
Date: 12 Mar 2007 21:39:11 -0700
Subject: Starting Python... some questions
Message-ID: <1173760751.798442.300550@s48g2000cws.googlegroups.com>

I started using Python a couple of days ago - here are a few
questions:

* Doesn't the __main__() method automatically execute when I run my
python program?
* Only when I do an import of my test.py file within python and then
run test.__main__() I can see where my bugs are. Is this correct?
(right now this is my only way of running my python program and see
where I have problems)
* Once I've done an import and then I wish to make a change to the
file I've imported I have to quit Python, restart and import that
module again in order for the module to be refreshed. Is there no "re-
import" ?
* Finally, could someone tell me why I'm having problems with the
small module below?
  - Python pretends I provide chassis_id() with three parameters, even
though I clearly only provide it with two - why?

Thanks!

#!/usr/bin/python
import scapy
import struct

class lldp_class:
	def __init__(self):
		self.chassis_id_tlv = None

	def chassis_id(subtype, chassis_info):
		if subtype == 4:
			chassis_data = struct.pack("!B",chassis_info)
		subtype_data = struct.pack("!B",subtype)
		self.chassis_id_tlv = subtype_data + chassis_data

def __main__():
	p = lldp_class()
	p.chassis_id(4, "01:80:C2:00:00:0E")
	payload = p.chassis_id_tlv
	ether = scapy.Ether(dst="01:02:03:04:05:06")
	fullpayload = ether + payload
	sendp(fullpayload)



From michele.simionato at gmail.com  Mon Mar 12 12:22:31 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Mar 2007 09:22:31 -0700
Subject: nonlinear interpolation
Message-ID: <1173713333.615789.287070@v33g2000cwv.googlegroups.com>

I want to interpolate a data distribution with a function depending on
various parameters; the function
can be a Gaussian, a Breit-Wigner, a custom function. Where should I
look? I am getting lost
between matplotlib, numeric, numpy, scientific python, scipy, etc.
etc.
Any pointer would be well received :)

      Michele Simionato



From no at spam.fr  Tue Mar 27 06:14:34 2007
From: no at spam.fr (ian)
Date: Tue, 27 Mar 2007 12:14:34 +0200
Subject: sys.excepthook and threads
Message-ID: <4608ee59$0$17589$426a34cc@news.free.fr>

Hi,

sys.excepthook don't work if an exception come in a thread...
It's normal or its a bug ? There are any tip ? look here :
http://spyced.blogspot.com/2005_06_01_archive.html

Thx




From mikeschinkel at gmail.com  Sun Mar 11 09:09:57 2007
From: mikeschinkel at gmail.com (Mike Schinkel)
Date: Sun, 11 Mar 2007 09:09:57 -0400
Subject: Parsing Indented Text (like parsing Python)
In-Reply-To: <op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com><1173595945.530722.273030@30g2000cwc.googlegroups.com><000a01c763c0$6863a560$2102fea9@Guides.local>
	<op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
Message-ID: <008f01c763de$9a1a4190$0702a8c0@Guides.local>

Gabriel Genellina wrote:
> Start with IC = Previous IC = 0, and a stack with a single 0 
> element For each line in the file:
>    compute the indentation column IC (that is, count the 
> number of leading whitespace characters; perhaps replacing 
> tabs as 8 spaces)
>    compare IC with the Previous IC:
>    	same: continue with next line
> 	IC > previous ("indent"): push IC onto indent stack
> 	IC < previous ("dedent"):
> 		discard top of stack
> 		look at the new top of stack (but dont discard 
> it); if not the same, indentation error.
>    Previous IC = IC

I went away and reviewed this, but it appears it doesn't tackle the
difficult part which was what made me ask the question in the first place.  

The problem is, how do I figure out how many spaces represent a tab? In one
case, someone could have their editor configured to allow tabs to use 3
spaces and the user could intermingle tabs and spaces. In other cases, a
user might have their editor configured to have a tab equal 8 spaces yet
also intermingle tabs and spaces. When a human looks at the document it is
obvious the setting but how can I make it obvious to my program?  

I could force the user to specify tabwidth at the top of the file, but I'd
rather not. And since Python doesn't either, I know it is possible to write
a parser to do this. I just don't know how.

-- 
-Mike Schinkel
http://www.mikeschinkel.com/blogs/
http://www.welldesignedurls.org
http://atlanta-web.org - http://t.oolicio.us



From mrmakent at cox.net  Sun Mar  4 16:29:38 2007
From: mrmakent at cox.net (Mike Kent)
Date: 4 Mar 2007 13:29:38 -0800
Subject: doxygen
In-Reply-To: <45eb0cc2$1@griseus.its.uu.se>
References: <45eb0cc2$1@griseus.its.uu.se>
Message-ID: <1173043778.885450.152300@v33g2000cwv.googlegroups.com>

On Mar 4, 1:15 pm, Jan Danielsson <jan.m.daniels... at gmail.com> wrote:

>    When I run doxygen on my python files, it does document classes, but
> not "standalone" functions.

Look in the doxygen config file for your python project, named
'Doxyfile', for the config setting
'EXTRACT_ALL', and read the comments there.



From skip at pobox.com  Fri Mar 23 09:30:39 2007
From: skip at pobox.com (skip at pobox.com)
Date: Fri, 23 Mar 2007 08:30:39 -0500
Subject: Catching an unknown error
In-Reply-To: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
Message-ID: <17923.54911.261738.696420@montanaro.dyndns.org>


    Harlin> value = raw_input("Type a divisor: ")
    Harlin> try:
    Harlin>    value = int(value)
    Harlin>    print "42 / %d = %d" % (value, 42/value)
    Harlin> except ValueError:
    Harlin>     print "I can't convert the value to an integer"
    Harlin> except ZeroDivisionError:
    Harlin>     print "Your value should not be zero"
    Harlin> except:
    Harlin>     print "Something unexpected happened"

    Harlin> In the last 'except' block, how can I print out the particular
    Harlin> error name even though one is not specifically named?

>>> try:
...   1/0
... except Exception, err:
...   print repr(err)
...
<exceptions.ZeroDivisionError instance at 0x81e96ac>

Skip


From arkanes at gmail.com  Mon Mar 12 11:57:16 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Mon, 12 Mar 2007 09:57:16 -0600
Subject: a better solution for GUI in python
In-Reply-To: <et0sjg$l8m$1@nemesis.news.tpi.pl>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
	<1173613976.277044.242160@8g2000cwh.googlegroups.com>
	<55iaceF24d6qgU2@mid.individual.net>
	<et0sjg$l8m$1@nemesis.news.tpi.pl>
Message-ID: <4866bea60703120857yd437cabqb899e01bceda7554@mail.gmail.com>

On 3/11/07, Jarek Zgoda <jzgoda at usun.pl> wrote:
> Bjoern Schliessmann napisa?(a):
>
> >> I'd recommend pyGTK. It's easy to use, delivers astonishing
> >> results and is perfectly portable as far as I know.
> >
> > And how does it look on Windows? :)
>
> On styled Windows XP it looks like any other styled application
> (counting  those Qt and wx based).

This is really an overstatement. While it uses the Windows theme
manager to draw widgets, and will appear native in screenshots, nobody
is going to mistake a Gtk app for a native Windows one in use. There
are lots of behaviors and graphical differences from native
applications.

That said, in order to make a useful recommendation your requirements
need to be better known.

Browser based clients are often poor for high speed data entry,
especially with highly trained data entry people. You simply don't
have enough control over the browser environment, and you're limited
in your ability to offload processing to the client. Ironing out
browser differences is also no picnic. On the other hand you've got
rapid and low cost deployment and updates.

Licensing is the main reason I'd avoid pyQt, if the licensing fits
your needs (or budget) then it's a perfectly reasonable solution.

Gtk I consider an extremely poor contender as a cross platform
toolkit. The runtime is enormous and it makes little effort to appear
native on any non-GNOME platform.

wxPython is also a perfectly reasonable solution, especially if you
want a "native" seeming app on all platforms. If consistency of
interface, rather than a native interface, is more important to you
then Qt would probably be a better choice.

From erokar at gmail.com  Mon Mar  5 17:00:24 2007
From: erokar at gmail.com (erokar at gmail.com)
Date: 5 Mar 2007 14:00:24 -0800
Subject: Make instance global -- possbile?
Message-ID: <1173132019.219765.19760@h3g2000cwc.googlegroups.com>


Rather new to OOP in Python...

I'm writing an app where several objects need to access and change the
state of ONE instance.

I could of course instantiate the instance and then pass it along the
objects, but that's cumbersome, especially as it would need to be
"passed through" classes that don't really need it.

I would be happy if I could just instantiate the object in the main
module and declare it global, but classes are in different modules so
I guess that won't work.

Have looked a bit into singletons -- is that the way to go?



From mmanns at gmx.net  Wed Mar 28 23:56:28 2007
From: mmanns at gmx.net (Martin Manns)
Date: Wed, 28 Mar 2007 23:56:28 -0400
Subject: gmpy floating point exception
Message-ID: <eufdde$ekb$1@aioe.org>

Hi,

I am experiencing some trouble with gmpy v1.01.
Multiplying an mpq with inf results in a floating point exception that
exits python. Has this already been fixed in newer gmpy versions? 

~ $ python
Python 2.4.3 (#1, Mar 26 2007, 00:32:54) 
[GCC 4.1.1 (Gentoo 4.1.1-r3)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from gmpy import mpq as Rational
>>> a=Rational(2,3)
>>> b=1.0e99999
>>> b
inf
>>> int(b)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
OverflowError: cannot convert float infinity to long
>>> a+b
Floating point exception
~ $


BTW.
1) What is the best way to test for inf regardless of type?
2) Is there any inf type around with
a + inf == inf
inf > a (as long as a != inf)
etc.
that works with any other type?

Thanks in advance

Martin


From andre.dos.anjos at gmail.com  Thu Mar  1 05:51:19 2007
From: andre.dos.anjos at gmail.com (andre.dos.anjos at gmail.com)
Date: 1 Mar 2007 02:51:19 -0800
Subject: Importing binary modules
Message-ID: <1172746279.351722.29410@p10g2000cwp.googlegroups.com>

How can I, in python (linux, python version >= 2.4.2), dynamically set
the path and import a binary module that depends on libraries which
are not declared in LD_LIBRARY_PATH or any other automated linker path
when python starts?

This is a an example:

Suppose I have a new python module, called MyNewModule.py. It resides
in '/my/module/dir'. Internally, it loads libMyNewModule.so, which
implements most of the functionality for MyNewModule, so the user can
say:

import sys
sys.path.append('/my/module/dir')
import MyNewModule

And everything works fine.

The problem appears when libMyNewModule.so depends on another library,
say libfoo.so, which sits also in /my/module/dir. In that case, '/my/
module/dir', needs to be preset in the LD_LIBRARY_PATH *before* the
python interpreter is set.

In this case, the snippet of code above will not work as one would
expect. It will normally give an ImportError saying it cannot find
libfoo.so. That happens, apparently, because the dynamic linker cannot
rescan LD_LIBRARY_PATH after the python interpreter has started.

So is there any other way to circumvent this?

import sys
sys.path.append('/my/module/dir')
#black magic to get the linker to reload the LD_LIBRARY_PATH
import MyNewModule

So this succeeds?



From bdesth.quelquechose at free.quelquepart.fr  Tue Mar 13 17:01:47 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 22:01:47 +0100
Subject: Need help with a string plz! (newbie)
In-Reply-To: <12vas0lj1u2ti78@corp.supernews.com>
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<12v3ksihos7uj7a@corp.supernews.com>
	<1173477047.467568.298090@p10g2000cwp.googlegroups.com>
	<2ZqdnZCruccLRWzYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<1173488215.913014.130190@h3g2000cwc.googlegroups.com>
	<mailman.4896.1173517512.32031.python-list@python.org>
	<12v8vk7sabb2i84@corp.supernews.com>
	<mailman.4955.1173678039.32031.python-list@python.org>
	<12vas0lj1u2ti78@corp.supernews.com>
Message-ID: <45f70902$0$5892$426a34cc@news.free.fr>

Grant Edwards a ?crit :
(snip)
> I don't know if emacs still includes Zippy quotes
> (of if they've been updated), but you used to be able to do
> "esc-X yow" and emacs would show you a random Zippy quote.
> 
It's still there.


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 01:44:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 02:44:12 -0300
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1tkMh.115$mG4.94@newsfe12.lga>
	<pan.2007.03.22.07.07.29.369580@REMOVEME.cybersource.com.au>
	<VAyMh.35$ek6.24@newsfe12.lga>
Message-ID: <op.tpmnjyhpx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 22 Mar 2007 14:04:04 -0300, Bart Willems <b.r.willems at gmail.com>  
escribi?:

>> chown scriptuser script.py  # a unique user
>> chmod a-rwx script.py
>> chmod u+rx script.py
>
> If it works on the target machine - I am under the assumption that the
> client is some kind of government office - more likely to run Windows
> than it is to run unix/linux/etc.
>
> Who has a similar solution for windows?

cacls /help

-- 
Gabriel Genellina



From jrpfinch at gmail.com  Mon Mar 26 04:53:22 2007
From: jrpfinch at gmail.com (jrpfinch)
Date: 26 Mar 2007 01:53:22 -0700
Subject: Calling Queue experts
Message-ID: <1174899202.355092.209590@l75g2000hse.googlegroups.com>

I have a script which is based on the following code.  Unfortunately,
it only works on Python 2.3 and not 2.5 because there is no esema or
fsema attribute in the 2.5 Queue.  I am hunting through the Queue.py
code now to try to figure out how to make it work in 2.5, but as I am
a beginner, I am having difficulty and would appreciate your help.

Many thanks

Jon

import os
import Queue
import threading
import time
import cPickle

class PickleQueue(Queue.Queue):
    """A multi-producer, multi-consumer, persistent queue."""


    def __init__(self, filename, maxsize=0):
        """Initialize a persistent queue with a filename and maximum
size.


        The filename is used as a persistent data store for the
queue.
        If maxsize <= 0, the queue size is infinite.
        """
        self.filename = filename
        Queue.Queue.__init__(self, maxsize)
        if self.queue:
            self.esema.release()
        if self._full():
            self.fsema.acquire()


    def _init(self, maxsize):
        # Implements Queue protocol _init for persistent queue.
        # Sets up the pickle files.
        self.maxsize = maxsize
        try:
            self.readfile = file(self.filename, 'r')
            self.queue = cPickle.load(self.readfile)
            self.readfile.close()
        except IOError, err:
            if err.errno == 2:
                # File doesn't exist, continue ...
                self.queue = []
            else:
                # Some other I/O problem, reraise error
                raise err
        except EOFError:
            # File was null?  Continue ...
            self.queue = []


        # Rewrite file, so it's created if it doesn't exist,
        # and raises an exception now if we aren't allowed
        self.writefile = file(self.filename, 'w')
        cPickle.dump(self.queue, self.writefile, 1)


    def __sync(self):
        # Writes the queue to the pickle file.
        self.writefile.seek(0)
        cPickle.dump(self.queue, self.writefile, 1)
        self.writefile.flush()


    def _put(self, item):
        # Implements Queue protocol _put for persistent queue.
        self.queue.append(item)
        self.__sync()


    def _get(self):
        # Implements Queue protocol _get for persistent queue.
        item = self.queue[0]
        del self.queue[0]
        self.__sync()
        return item

class counterThread(threading.Thread):
    numberQueue = PickleQueue('/export/home/jrpf/data.pkl')
    exitCounterQueue = Queue.Queue(1)

    def run(self):
        command = ''
        i = 0
        while 1:
            self.numberQueue.put(i)
            if i > 10:
                print "i > 10 so attempting to exit"
                wt.exit()
                self.exit()


            print i
            try:
                command = self.exitCounterQueue.get(block=False)
            except Queue.Empty:
                pass
            if command == 'exit':
                print "Counter thread exited"
                break
            i = i + 1
            time.sleep(1)

    def exit(self):
        self.exitCounterQueue.put('exit')

def main():

    ct = counterThread()
    ct.setDaemon(True)
    ct.start()
    ct.join()

if __name__ == "__main__":
    main()



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 09:08:29 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 14:08:29 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
Message-ID: <45fe8b4c$0$16060$426a34cc@news.free.fr>

momobear a ?crit :
> hi, I am puzzled about how to determine whether an object is
> initilized in one class, anyone could give me any instructions?
> here is an example code:
> 
> class coffee:
>          def  boil(self):
>                self.temp = 80
> 
> a = coffer()
> if a.temp > 60:
>      print "it's boiled"
> 
> in C++ language we must initilized a variable first, so there is no
> such problem, but in python if we don't invoke a.boil(), we will not
> get self.temp to be initilized,

Obviously. This is why it's good form to set all public attributes in 
the initializer method:

class Coffee(object):
   def __init__(self):
     self.temp = 20
   def boil(self):
     self.temp = 80



From duncan.booth at invalid.invalid  Thu Mar 29 07:52:21 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 29 Mar 2007 11:52:21 GMT
Subject: BeautifulSoup vs. Microsoft
References: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
	<Xns99025B6FD25CFduncanbooth@127.0.0.1>
	<1175163104.054405.28190@d57g2000hsg.googlegroups.com>
Message-ID: <Xns9902819FBF051duncanbooth@127.0.0.1>

"Justin Ezequiel" <justin.mailinglists at gmail.com> wrote:

> On Mar 29, 4:08 pm, Duncan Booth <duncan.bo... at invalid.invalid> wrote:
>> John Nagle <n... at animats.com> wrote:
>> >      title="<!--http://www.microsoft.com/usability/information.mspx->"
>>
>> > is supposed to be an HTML comment.  But it's improperly terminated.
>>
>> It is an attribute value, and unescaped angle brackets are valid in
>> attributes. It looks to me like a bug in BeautifulSoup.
> 
> FWIW, see http://tinyurl.com/yjtzjz
> 
> new fan of BeautifulSoup here as it helped me parse "BAD" XML
> (although my client would disagree with that description)
> 
I'm right behind BeautifulSoup's ability to parse bad HTML, but I still 
think it should give priority to being able to parse valid HTML withough 
messing it up.


From yinglcs at gmail.com  Sun Mar 11 23:29:21 2007
From: yinglcs at gmail.com (yinglcs at gmail.com)
Date: 11 Mar 2007 20:29:21 -0700
Subject: How to modify the source of a python file inside a python egg file?
Message-ID: <1173670160.897478.34450@j27g2000cwj.googlegroups.com>

How to modify the source of a python file inside a python egg file?
I can see the file by unzipping it, but how can I package it back as a
python egg file after my modification.

Thank you.



From laurent.pointal at limsi.fr  Thu Mar 15 05:03:12 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Thu, 15 Mar 2007 10:03:12 +0100
Subject: dict.items() vs dict.iteritems and similar questions
In-Reply-To: <7xlkhzttja.fsf@ruckus.brouhaha.com>
References: <1173886227.609832.170540@l75g2000hse.googlegroups.com>
	<et958a$o9c$1@news2.u-psud.fr> <7xlkhzttja.fsf@ruckus.brouhaha.com>
Message-ID: <etb245$r37$1@news2.u-psud.fr>

Paul Rubin a ?crit :
> Laurent Pointal <laurent.pointal at limsi.fr> writes:
>> Both work, you may prefer xrange/iteritems for iteration on large
>> collections, you may prefer range/items when processing of the result
>> value explicitly need a list (ex. calculate its length) or when you are
>> going to manipulate the original container in the loop.
> 
> You can use len(d) if d is a dict.

Yes, as long as you have a semantic relation between the original dict
and the extracted keys. But once you have extracted the keys, and pass
them around your functions, if you miss the relationship, you have
either a list container or a generator. Not considering the case where
original dict is modified between keys extraction and keys usage...

But as we dont know more about OP needs...


A+

Laurent.


From lojicdotcomNOSPAM at gmail.com  Thu Mar  8 02:01:15 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Thu, 08 Mar 2007 02:01:15 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <7mOHh.3099$h73.2536@newsfe12.lga>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<LWHHh.1355$_a1.157@bignews7.bellsouth.net>
	<jaKHh.1974$uo3.161@newssvr14.news.prodigy.net>
	<7mOHh.3099$h73.2536@newsfe12.lga>
Message-ID: <YwOHh.4278$B7.2519@bigfe9>

Ken Tilton wrote:
> John Nagle wrote:
>> Brian Adkins wrote:
>>> John Nagle wrote:
>>> If you want to restart a debate, please go back and reply to some 
>>> serious post in the thread - don't hijack mine for your own evil 
>>> purposes and cut out the good parts - did you even see the movie?
>>
>>
>>    If you want to post jokes...
> 
> fer chrissakes, it was the OP of "means what you think it means" who was 
> obviously doing Princess Bride and being reasonably funny,

Turns out John is having quite a tough time with Python web hosting (the 
thread has split off to a c.l.p only fork), so I'm going to cut him some 
slack. Maybe with some lovin' we can woo him over to c.l.l ;)

> Brian just 
> missed that it was deliberate.

D'oh!

> , try ...
> 
> ....comp.lang.lisp. All the SBCL bug reports are starting to drag down 
> the mood of this NG.
> 
> kt
> 


From f98dawa at dd.chalmers.se  Mon Mar  5 07:25:43 2007
From: f98dawa at dd.chalmers.se (Dag)
Date: Mon, 5 Mar 2007 12:25:43 +0000 (UTC)
Subject: Python stock market analysis tools?
References: <1173066776.884126.86810@64g2000cwx.googlegroups.com>
Message-ID: <slrneuo327.bth.f98dawa@shii.medic.chalmers.se>

On 4 Mar 2007 19:52:56 -0800, Mudcat <mnations at gmail.com> wrote:
> I have done a bit of searching and can't seem to find a stock market
> tool written in Python that is active. Anybody know of any? I'm trying
> not to re-create the wheel here.

Depends on what you mean by stock market tool.  There's http://ta-lib.org 
which while written in C++ claims to have a python wrapper.  That being 
said last time I looked at it I couldn't get the python binding working, 
but I didn't spend much time on it.

Dag


From dnwurtz at gmail.com  Mon Mar  5 13:33:55 2007
From: dnwurtz at gmail.com (dnwurtz at gmail.com)
Date: 5 Mar 2007 10:33:55 -0800
Subject: New to Python
Message-ID: <1173119634.739433.240520@s48g2000cws.googlegroups.com>

I am trying to get a program to add up input from the user to get to
the number 100 using a loop.  However, I am having some issues.  Here
is what I have so far.  I know I am just trying to hard, but I am
stuck.  Thank you for any help.

print "We need to count to 100"

high_number = 100
total = 0

number = input("Enter your first number ")
sum = number + total
while sum < high_number:
    print "Not there yet..."
    number = input("Enter another number ")

print "We are there!!!"



From gigs at hi.t-com.hr  Thu Mar  1 08:36:33 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Thu, 01 Mar 2007 14:36:33 +0100
Subject: django learn
Message-ID: <es6kt4$i9b$1@ss408.t-com.hr>

HI folks!

I want to learn to make web pages with django.
I dont know nothing about HTML.

How much of HTML I need to know to be able to learn django well?


Thanks!


From ebgssth at gmail.com  Sat Mar  3 03:07:43 2007
From: ebgssth at gmail.com (js )
Date: Sat, 3 Mar 2007 17:07:43 +0900
Subject: print a ... z, A ... Z, "\n"' in Python
Message-ID: <a23effaf0703030007w3621b75du748c2cb1d9b0340b@mail.gmail.com>

HI guys,

How do you write Perl's

    print a ... z, A ... Z,  "\n"' in Python


In Python?


A way I came up with is the following, but I'm sure this is ugly.

    ''.join(chr(c) for c in (range(ord('a'), ord('z')+1) +
range(ord('A'), ord('Z')+1)))
or
    crange = lambda c1, c2: [ chr(c) for c in range(ord(c1), ord(c2)+1) ]
    ''.join(chr(c) for c in crange('a', 'z') + crange('A', 'Z'))


I want to feel The Zen of Python :)


From aleax at mac.com  Sun Mar 11 21:56:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 18:56:08 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
	<1173642367.926295.205400@64g2000cwx.googlegroups.com>
Message-ID: <1hutr21.qrf8np10dpnwlN%aleax@mac.com>

Mark Dickinson <dickinsm at gmail.com> wrote:

> On Mar 11, 2:59 pm, a... at mac.com (Alex Martelli) wrote:
> > [...]
> > OTOH, Python 2.4 works just fine...:
> >
> > Python 2.4.3 (#1, Apr  7 2006, 10:54:33) [GCC 4.0.1 (Apple Computer,
> > Inc. build 5250)] on darwin Type "help", "copyright", "credits" or
> > "license" for more information.>>> 0.0,-0.0
> > (0.0, -0.0)
> > >>> -0.0,0.0
> >
> > (-0.0, 0.0)
> >
> > so it seems to be very specifically a 2.5 problem.
> 
> I've filed a bug report (bug #1678380) and got an impressively
> quick response from MvL.  It looks like this is a `won't fix'.
> Oh well.

That bug isn't formally closed yet, and the discussion's going on, we'll
see.  Meanwhile can you try my patch 1678668 just to double check it
does fix everything?  (It's agains the current HEAD of Python's svn).


Alex


From danb_83 at yahoo.com  Thu Mar 22 20:59:47 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 22 Mar 2007 17:59:47 -0700
Subject: TypeError: 'int' object is not callable
In-Reply-To: <1174611244.465956.104060@n76g2000hsh.googlegroups.com>
References: <1174611244.465956.104060@n76g2000hsh.googlegroups.com>
Message-ID: <1174611587.000306.210790@b75g2000hsg.googlegroups.com>

On Mar 22, 6:54 pm, AWasile... at gmail.com wrote:
> I'm trying to test a few different approaches to displaying pages via
> Cherrypy and I'm not having much luck.  Here is my code so far:
>
> import sys, cherrypy, html
>
> class Root:
>         @cherrypy.expose
>         def index(self, pageid = None):
>                 selection = html.Page()
>                 return  selection.input()
>
> cherrypy.config.update({'server.socket_port': 2572, 'log.screen':
> False})
> cherrypy.quickstart(Root())
>
> and here is the html.py file that I import:
>
> class Page:
>         def input(self,dex=None):
>                 if dex == None:
>                         return 404(dex)
>                 else:
>                         return "Something else?"
>
>         def err404(self,whatitis="N/A"):
>                 return """<body bgcolor="#666666">
> <br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
>
> <center>Sorry the page: """ + str(whatitis) + """ does not exist.<br /
>
> <img src="/files/images/404.png" alt="Page cannot be found."></center>
> </body>"""
>
> and here is the error I get when trying to run this:
>
> 500 Internal Server Error
> The server encountered an unexpected condition which prevented it from
> fulfilling the request.
>
> Traceback (most recent call last):
>   File "/home2/awasilenko/lib/python2.4/cherrypy/_cprequest.py", line
> 342, in respond
>     cherrypy.response.body = self.handler()
>   File "/home2/awasilenko/lib/python2.4/cherrypy/_cpdispatch.py", line
> 15, in __call__
>     return self.callable(*self.args, **self.kwargs)
>   File "/home2/awasilenko/webapps/cp/site.py", line 7, in index
>     return  selection.input()
>   File "/home2/awasilenko/webapps/cp/html.py", line 4, in input
>     return 404(dex)
> TypeError: 'int' object is not callable
>
> I know this isn't a Cherrypy issue since I have made other pages work,
> I'm just making a dumb mistake somewhere.  My plan is to eventually be
> able to pass dex to the input def in the page class so it can display
> the right page.  Right now I am just trying to make ANY thing show up,
> what should happen is since I'm not passing anything everything should
> be None and the 404 page should pop up.  I would also like to make the
> 404 page print the page that was requested, I have already coded the
> return but have not "connected" it yet, one step at a time...

404 is an integer literal; you can't use it as a function name.



From duncan.booth at invalid.invalid  Thu Mar 22 09:30:19 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 22 Mar 2007 13:30:19 GMT
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ett5h2$1ll$1@sea.gmane.org>
	<mailman.5443.1174553746.32031.python-list@python.org>
Message-ID: <Xns98FB8961DA528duncanbooth@127.0.0.1>

Steve Holden <steve at holdenweb.com> wrote:

> Help me out here. It looks as though the real syntax should 
> be something like
> 
> assignment_stmt       ::=       (target_list "=")+ expression_list |
>                                  (target_list "=")+ assignment_stmt

That is precisely the point. If it was:

assignment_stmt       ::=       (target_list "=") expression_list |
                                 (target_list "=") assignment_stmt

(i.e. removing the '+' which your eyes jumped over)
then the actual assignments would have to apply right to left with each 
assignment giving the result for the next one.

But since it is:

assignment_stmt       ::=       (target_list "=")+ expression_list

the repeated target lists may be expected, and are indeed defined, to 
assign left to right.


From aleax at mac.com  Thu Mar 29 11:31:04 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 08:31:04 -0700
Subject: What is the timeout value of HTTP
References: <1175181779.889368.38170@l77g2000hsb.googlegroups.com>
Message-ID: <1hvqa7y.1pb26chsw65k9N%aleax@mac.com>

ken <ken.carlino at gmail.com> wrote:

> Can you please tell me what is the timeout value of httplib.HTTP?
> 
> i.e. how long python will wait for a response in the below code?
> 
>    h = httplib.HTTP(self.url, 8080)
>         h.putrequest('GET', '/sample/?url=' + self.url)
>         h.endheaders()

HTTP per se does not define any timeout -- if self.url is correctly
resolved by DNS and accepts a TCP connection on port 8080, and then just
hangs forever, you'll be waiting.  You can force timeouts yourself by
playing with socket.setdefaulttimeout(...) before you start the HTTP
interaction.


Alex


From mail at microcorp.co.za  Fri Mar  2 01:16:36 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 2 Mar 2007 08:16:36 +0200
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com><mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
Message-ID: <011b01c75c92$55ac8a20$03000080@hendrik>

 <bayer.justin at googlemail.com> wrote:

8<------------------
> The C programm gets its "commands" from its stdin and sends its state
> to stdout. Thus I have some kind of dialog over stdin.
> 
> So, once I start the C Program from the shell, I immediately get its
> output in my terminal. If I start it from a subprocess in python and
> use python's sys.stdin/sys.stdout as the subprocess' stdout/stdin I
> also get it immediately.

so why don't you just write to your stdout and read from your stdin?

> 
> BUT If I use PIPE for both (so I can .write() on the stdin and .read()

This confuses me - I assume you mean write to the c program's stdin?

> from the subprocess' stdout stream (better: file descriptor)) reading
> from the subprocess stdout blocks forever. If I write something onto
> the subprocess' stdin that causes it to somehow proceed, I can read
> from its stdout.

This sounds like the c program is getting stuck waiting for input...

> 
> Thus a useful dialogue is not possible.
> 

If you are both waiting for input, you have a Mexican standoff...

And if you are using threads, and you have issued a .read() on
a file, then a .write() to the same file, even followed by a .flush()
will not complete until after the completion of the .read().

So in such a case you have to unblock the file, and do the .read() in
a try - except clause, to "free up" the "file driver" so that the .write()
can complete.

But I am not sure if this is in fact your problem, or if it is just normal
synchronisation hassles...

- Hendrik



From robert.kern at gmail.com  Thu Mar  1 14:38:29 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 01 Mar 2007 13:38:29 -0600
Subject: Python on a mac: how to build pythonw?
In-Reply-To: <rNOSPAMon-F4DBC0.11004601032007@news.gha.chartermi.net>
References: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>	<mailman.4582.1172771922.32031.python-list@python.org>	<rNOSPAMon-63AA6E.10054801032007@news.gha.chartermi.net>	<mailman.4583.1172773764.32031.python-list@python.org>
	<rNOSPAMon-F4DBC0.11004601032007@news.gha.chartermi.net>
Message-ID: <es7a3n$a7m$1@sea.gmane.org>

Ron Garret wrote:
> In article <mailman.4583.1172773764.32031.python-list at python.org>,
>  Robert Kern <robert.kern at gmail.com> wrote:
> 
>> Ron Garret wrote:
>>> In article <mailman.4582.1172771922.32031.python-list at python.org>,
>>>  Robert Kern <robert.kern at gmail.com> wrote:
>>>> Note that in recent versions of Python, I believe that the pythonw 
>>>> executable 
>>>> is no longer necessary as a workaround.
>>> How recent?  I'm already using 2.5.
>> 2.5 definitely works.
> 
> Yes, once you know the magic incantation:
> 
> ./configure --enable-universalsdk

Actually, --enable-framework is the relevant flag for this feature. You should
use both, of course.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From kyosohma at gmail.com  Mon Mar 26 14:22:08 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 11:22:08 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174933054.671047.217640@n59g2000hsh.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
	<1174926951.133085.294900@l75g2000hse.googlegroups.com>
	<1174930461.108420.219960@d57g2000hsg.googlegroups.com>
	<1174933054.671047.217640@n59g2000hsh.googlegroups.com>
Message-ID: <1174933328.048439.31010@d57g2000hsg.googlegroups.com>

On Mar 26, 1:17 pm, "jp" <johnpe... at yahoo.com> wrote:
> On Mar 26, 12:34 pm, kyoso... at gmail.com wrote:
>
>
>
> > On Mar 26, 11:35 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > > On Mar 26, 11:27 am, kyoso... at gmail.com wrote:> On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
>
> > > > > On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > > > > > I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> > > > > > I skip over these widgets when using the tab key?
>
> > > > > > Thank you,
> > > > > > John
>
> > > > > I would probably write some custom event handling. Something that
> > > > > could tell it was a key-press event and not just an on-focus event.
> > > > > Then it would be a simple, if key-press == tab, put focus on next
>
> > > #> > widget of interest. Something like that should work.
>
> > > > > Mike
>
> > > > I looked in my Tkinter book, and it says that if the widget has the
> > > > "takefocus" option set to true, the widget is placed in the tab group
> > > > and will get focus when they are tabbed to. I assume that this means
> > > > if you set the PMW widgets' "takefocus" option to false, they will be
> > > > skipped over since they won't be in the tab group.
>
> > > > Mike
>
> > > I've tried using the takefocus option set to 0 and 1 but either way,
> > > the tab key still stops at my EntryField.  Below is my snippet of
> > > code.  What am I doing wrong?
>
> > > entry=Pmw.EntryField(frame,
> > >                      labelpos = 'w',
> > >                      value = "",
> > >                      label_text =
> > > 'Name:')
> > > entry.grid(row=1)
> > > #entry.component('entry').takefocus = 1
> > > entry.component('entry').takefocus = 0
>
> > According to the Tkinter book, setting takefocus to 0 (false) should
> > work. Are you putting th EntryField into a Grid? If so, that might be
> > the problem. I suppose the grid may override its children's settings.
>
> > I've never messed too much with skipping widgets in the tab order. You
> > could pack the PMW widgets last so that they won't get tabbed to until
> > the end.
>
> > There's also tk_focusNext & tk_focusPrev. See the following post for
> > more info and ideas:
>
> >http://www.dbforums.com/archive/index.php/t-1377788.html
>
> > Mike
>
> I am using a grid, but even using pack() the takefocus=0 doesn't
> work.  The tab key still moves to my EntryField.
> I'll look into the focusNext and focusPrev that you suggested.  Thanks!

Oops. Sorry. When I said grid, I was thinking that Tkinter had a grid
widget. I had forgotten they called one of there sizer/place
management options "grid". Sorry about that. I use wxPython as much as
possible.

Mike



From inurasalangova at gmail.com  Wed Mar 21 17:08:21 2007
From: inurasalangova at gmail.com (inurasalangova at gmail.com)
Date: 21 Mar 2007 14:08:21 -0700
Subject: this is perfect !
Message-ID: <1174511300.943716.116380@l77g2000hsb.googlegroups.com>


http://s16.bitefight.net/c.php?uid=16391



From adaworks at sbcglobal.net  Sun Mar 18 22:21:35 2007
From: adaworks at sbcglobal.net (adaworks at sbcglobal.net)
Date: Mon, 19 Mar 2007 02:21:35 GMT
Subject: Choosing Python
Message-ID: <PsmLh.8409$yW.3649@newssvr11.news.prodigy.net>

The choice is made.   The school where I teach has finally
made its decision to teach Python first.    For several years,
we have been teaching Java first, and before that, C++.

I introduced Python in one of my courses and got a lot of
flak from some of the other faculty.  I also introduced Ruby,
and got even more flak.   In my course, the students loved
Python for its simplicity, its power, and its flexibility.

It is clear that Python is not the ultimate, one-size-fits-all
language.  No language is.  However, for a beginner's
language it is nearly ideal.   Further, it is a great language
for a wide range of serious programming problems.

For large-scale, safety-critical software, I still prefer Eiffel
or Ada.   Java could vanish tomorrow and, with Python
and Ruby available, no one would miss Java at all.  As for
C++, for any serious software systems, it should always be
the language of last resort.   C++, as an object-oriented
assembler, is pretty much its own virus.

Already, students are turning in really good projects in Python,
and some in Ruby.   Not all the professors are on-board with
this decision, but in time I think they will be.

Richard Riehle 




From nagle at animats.com  Sat Mar  3 18:16:03 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 03 Mar 2007 15:16:03 -0800
Subject: Python FTP server down
Message-ID: <nSmGh.5295$P47.3241@newssvr22.news.prodigy.net>

"ftp://ftp.python.org/pub/" is returning "Connection Refused" today.

Does that ever work?  I need FTP access to download onto a colocated
server.


				John Nagle


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 18:27:05 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 00:27:05 +0100
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173131863.216300.109120@s48g2000cws.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
	<1173131863.216300.109120@s48g2000cws.googlegroups.com>
Message-ID: <45ec9f4e$0$32280$426a74cc@news.free.fr>

Adam Atlas a ?crit :
> Ah... heh, sorry, I misread your message as "a much more convenient
> way" rather than "much more than a convenient way".

!-)

(snip)

> But my other points still stand.

Indeed.


From steve at holdenweb.com  Mon Mar 19 17:21:17 2007
From: steve at holdenweb.com (Steve Holden)
Date: Mon, 19 Mar 2007 17:21:17 -0400
Subject: Problem with sockets and python 2.5
In-Reply-To: <200703192207.08178.jareguero@telefonica.net>
References: <200703192207.08178.jareguero@telefonica.net>
Message-ID: <etmuv4$ith$1@sea.gmane.org>

Jose Alberto Reguero wrote:
> I had two programs, server.py and client.py(attached)
> 
> 1:
> 	server.py at i386 python 2.4
> 	client.py at x86_64 python 2.5
> Work
> 
> 2:
> 	server.py at x86_64 python 2.5
> 	client.py at i386 python 2.4
> Don't work
> 
> Any ideas?

Fix them?

regards
  Steve
--
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 10 20:28:05 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 02:28:05 +0100
Subject: distributed queue?
References: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>
Message-ID: <55h495F250nqbU1@mid.individual.net>

Paul Rubin wrote:

> Does anyone have an implementation of a distributed queue?  I.e. I
> have a long running computation f(x) and I'd like to be able to
> evaluate it (for different values of x) on a bunch of different
> computers simultaneously, the usual "worker thread" pattern except 
> distributed across a network.  

Doesn't sound difficult to implement.

> I guess this is pretty easy to write with a centralized socket
> listener that dispatches requests through a Queue to multiple
> threads on the same machine, each talking synchronously to a
> server socket.  

(Why does everyone think that "concurrency" equals "usage of
multiple threads"?)

> I wonder if something like it already exists.  I see a little bit
> of discussion in the newsgroup archive but no obvious pointers to
> code.

Try Twisted for your networking needs. With it it's quite easy to
develop an own little protocol (e. g. on top of TCP). When you have
this ready, writing a server and client using it is a matter of
minutes.

http://twistedmatrix.com/projects/core/documentation/howto/servers.html
http://twistedmatrix.com/projects/core/documentation/howto/clients.html

For bigger needs, Twisted also has RPC features.

Regards,


Bj?rn


-- 
BOFH excuse #281:

The co-locator cannot verify the frame-relay gateway to the ISDN
server.



From http  Mon Mar  5 06:42:45 2007
From: http (Paul Rubin)
Date: 05 Mar 2007 03:42:45 -0800
Subject: Getting external IP address
References: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>
	<Xns98EA5C051525Cduncanbooth@127.0.0.1>
Message-ID: <7xtzwz9aru.fsf@ruckus.brouhaha.com>

Duncan Booth <duncan.booth at invalid.invalid> writes:
> If you try connecting to 'www.showmyip.com' and requesting '/xml/' it 
> should work.

If the firewall is really obnoxious, it can bounce consecutive queries
around between multiple originating IP addresses.  That is uncommon
but it's been done from time to time.


From bthom at cs.hmc.edu  Fri Mar 23 14:20:28 2007
From: bthom at cs.hmc.edu (belinda thom)
Date: Fri, 23 Mar 2007 11:20:28 -0700
Subject: exit to interpreter?
In-Reply-To: <1174673079.976162.307960@n76g2000hsh.googlegroups.com>
References: <mailman.5522.1174672336.32031.python-list@python.org>
	<1174673079.976162.307960@n76g2000hsh.googlegroups.com>
Message-ID: <79D1F2A3-CDD2-4344-B70F-2B3FA3532782@cs.hmc.edu>


On Mar 23, 2007, at 11:04 AM, kyosohma at gmail.com wrote:

> On Mar 23, 12:52 pm, belinda thom <b... at cs.hmc.edu> wrote:
>> Hi,
>>
>> I'm writing a function that polls the user for keyboard input,
>> looping until it has determined that the user has entered a valid
>> string of characters, in which case it returns that string so it can
>> be processed up the call stack. My problem is this. I'd also like it
>> to handle a special string (e.g. 'quit'), in which case control
>> should return to the Python command line as opposed to returning the
>> string up the call stack.
>>
>> sys.exit seemed like a good choice, but it exits the python  
>> interpreter.
>>
>> I could use an exception for this purpose, but was wondering if
>> there's a better way?
>>
>> --b
>
> If you're using a function, wouldn't using the keyword "return" work?
>
> Mike

No, because that just returns to the caller, which is not the Python  
interpreter.



From doug at localhost.localdomain  Tue Mar 20 09:53:24 2007
From: doug at localhost.localdomain (Doug Gray)
Date: Tue, 20 Mar 2007 13:53:24 GMT
Subject: Bullet proof passing numeric values from NMEA data stream.
References: <pan.2007.03.20.12.09.21.19785@localhost.localdomain>
	<pan.2007.03.20.13.28.59.24933@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2007.03.20.13.53.23.910306@localhost.localdomain>

On Wed, 21 Mar 2007 00:29:00 +1100, Steven D'Aprano wrote:

> On Tue, 20 Mar 2007 12:09:29 +0000, Doug Gray wrote:
> 
>> Folks,
>> I am looking for a fast but most importantly a bullet proof method to pass
>> and NMEA data stream (GPS output) ascii numeric strings. The best I can
>> offer is:
>> 
>> def fint(a):
>>  try: return int(float(a))
>>  except: return 0
> 
> 
> Will your application calculate the wrong results if it starts getting a
> whole lot of spurious zeroes? Wouldn't it better to signal "this value is
> invalid" rather than a false zero?
> 
> Do you actually want ints? It seems to me that if your data stream is
> delivering floats, you're throwing away a lot of data. For example, if the
> data stream is: 
> 
> 2.4, 5.7, 3.9, 5.1, ...
> 
> you're getting:
> 
> 2, 5, 3, 5, ...
> 
> which is possibly not even the right way to convert to ints. Shouldn't you
> be rounding to nearest (i.e. 2, 6, 4, 5, ...)?
> 
> [snip]
> 

Thanks, a very helpful response. I'll need some time to fully digest.
Yes I will need a float variant, the int version was by way of example. I
can deal with the rounding etc as necessary, but I was after an
pythonistic view of the generic problem.

Re the examples: whitespace and mal positioned signs and decimal point
would be the obvious errors I might expect but of course this is
speculation.  The few GPS units I have tried have all tripped up my first
cut less tolerant code.  I am going to revise the interface to work around
potential problems and my preliminary test efforts highlighted more
exceptions than I expected.

Doug




From mmcgee00 at hotmail.com  Tue Mar 13 16:18:12 2007
From: mmcgee00 at hotmail.com (mmcgee00 at hotmail.com)
Date: 13 Mar 2007 13:18:12 -0700
Subject: Getting a service's banner by connect to a port
Message-ID: <1173817092.152401.202870@y80g2000hsf.googlegroups.com>

Hi,

Currently, I am trying to get different service banner by connecting
to different ports using python (code below).  The versions I am
working with are python 4.2.1 and fedora core 4.  I am trying to
reproduce a very small piece of nmap, since nmap has to get a port's
banner in order to figure out the version.  However, I haven't been
entirely successful.

*******************************************************
maxBannerLength = 1024
def probeScan(host, port, probeString):
		s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
		s.settimeout(6)
		try:
            		s.connect((host, port))
			s.send(probeString)
			data = s.recv(maxBannerLength)

		except socket.timeout:
			print "socket.timeout exception"
			data = ""
		except socket.error, (value, message):
			print "socket.error " +  message
			data = ""

		# Close connection and return banner/data
		s.close()
		return data

*******************************************************

First off, the above code works fine for some ports.  I was able to
get the correct banners for some ports, some using the probeString as
an empty string and others as a different probeString.

But I have been having issues with many others.  The one I have tested
most recently was port 515 (services given from nmap on 2 ip addresses
are "printer" and "sdmsvc".  Now, I pass in the variable probeString
to the function as an empty string "", some of the ports (including
515) should give me the banner right away without needing a specific
probeString.  My python program is ending up in the socket.timeout
exception.  I have increased the timeout a couple of times to check if
that may be the problem, but no such luck.  I have been testing my
results from the above program with the results of netcat.  Netcat
gives me the correct banner when I pass it an empty string "".

As far as I have been able to figure out, I just need to connect to a
port, and send it a probeString.  As long as the correct probeString
is sent, the port(s) should give their banner.  I am pulling the
probeStrings from the nmap-service-probes file, which is the file that
nmap keeps its probes.  So, I am confident my probes are correct.

Has anyone ever run into this problem?  Or have suggestions?
I would greatly appreciate any information.

Thanks in advance.



From kyosohma at gmail.com  Fri Mar 30 15:28:13 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 12:28:13 -0700
Subject: New to Python - Easy way to open a text file
In-Reply-To: <pan.2007.03.30.16.39.12.89800@gmx.net>
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
	<1175270675.296617.83380@e65g2000hsc.googlegroups.com>
	<pan.2007.03.30.16.39.12.89800@gmx.net>
Message-ID: <1175282893.015117.154310@l77g2000hsb.googlegroups.com>

On Mar 30, 11:39 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <1175270675.296617.83... at e65g2000hsc.googlegroups.com>, kyosohma wrote:
> > I'm not familiar with ezt formats, however reading a text file is a
> > breeze.
>
> This sentence doesn't match the code that follow.  It's really simpler
> than that ``while`` loop.
>
> > f = open(r'pathToFile')
> > while True:
> >    line = f.readline()
> >    if not line: break
> >    # do something with the line of text such as print it.
>
> > f.close()
>
> f = open(r'pathToFile)
> for line in f:
>     # do something with the line of text such as print it.
> f.close()
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Yes, the "while" is lame, I admit it. But sometimes you just gotta go
old school!

Mike



From ptmcg at austin.rr.com  Fri Mar 30 10:43:40 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 30 Mar 2007 07:43:40 -0700
Subject: Indentation for code readability
In-Reply-To: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
Message-ID: <1175265820.774681.245960@d57g2000hsg.googlegroups.com>

On Mar 30, 4:04 am, "DE" <devrim.er... at gmail.com> wrote:
>
> The curly brackets have no functional meaning...

"Curly brackets have no functional meaning"?  Surely you must be
thinking of C, but not C++.  Some of the most powerful idioms (idia?)
of C++ make use of functionality that runs when a closing bracket
causes local variables to fall out of scope.  In fact, this technique
is crucial to writing exception-safe code.

The most obvious has to do with memory allocation/deallocation, and
the STL template <auto_ptr>.  <auto_ptr> was invented to prevent this
problem:

    {
        // create a pointer - let's pretend I need a pointer
        // and can't just allocate blah as a local SomeObject
        SomeObject* blah = new SomeObject();

        // do something with blah
        blah->doSomething();

        // do something else - OOPS! exception happened
        blah->doSomethingBad();

        delete blah;  // never got here - memory leaked
    }

Instead, define blah using <auto_ptr>:

    {
        // create a pointer - let's pretend I need a pointer
        // and can't just allocate blah as a local SomeObject
        auto_ptr<SomeObject> blah ( new SomeObject() );

        // do something with blah
        blah->doSomething();

        // do something else - OOPS! exception happened
        blah->doSomethingBad();

        // but we don't care because when auto_ptr goes out
        // of scope, it deletes its pointers allocated
        // memory
    }

I was on one C++ project in which our coding guidelines said something
to the effect of "no delete statements except in cleanup templates,"
meaning that all allocated variables had to be wrapped in some form of
auto_ptr template to ensure resource release on delete, even in the
face of exceptions.

So that closing '}' actually DOES do something functional, in running
the destructors of all locally declared variables.

But why should Python folks care, since garbage collection takes care
of our basic memory needs without all this auto_ptr<Stuff> stuff?
Well memory allocation is only one of these symmetric function cases.
Garbage collection doesn't do anything for us in:
- database transaction commit/rollback
- mutex lock/unlock
- web client session close/release
- release of any other kind of allocatable resource

AND, it does this deterministically, not "at some possible time in the
future" like GC.
(Yes, I know that CPython's ref counting scheme *does* release memory
immediately, but this is an implementation-specific behavior.)

Prior to Python 2.5's "with" construct, the closest Pythoners could
get was to use try/catch/finally, and put the resource release code
into the finally block.  There are also some decorators on the Python
wiki that encapsulate this "be sure to close the door" logic into some
friendlier syntax (even if it does use that ugly '@').

-- Paul



From chris.lasher at gmail.com  Mon Mar 26 18:06:27 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 26 Mar 2007 15:06:27 -0700
Subject: PDB does not allow jumping to first statement?
Message-ID: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>

Hi all,

I have a simple script:

---
#!/usr/bin/env python

a = 1
b = 2

c = a + b

print c
---

I launch said script with pdb:

python -m pdb simple.py

I noticed that I absolutely cannot jump back to the first statement
(line 3, "a = 1") using the jump command. I can jump to any other line
BUT the first statement's using the "jump <line number>" command. I
experience the same behavior with Winpdb and rpdb2. Why is this?

Stumped,
Chris



From gerard.blais at gmail.com  Wed Mar 21 07:27:28 2007
From: gerard.blais at gmail.com (Gerry)
Date: 21 Mar 2007 04:27:28 -0700
Subject: Unicode in Excel files
In-Reply-To: <1174471656.165471.54680@e1g2000hsg.googlegroups.com>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<mailman.5357.1174433396.32031.python-list@python.org>
	<1174434442.142511.37240@p15g2000hsd.googlegroups.com>
	<mailman.5361.1174437437.32031.python-list@python.org>
	<1174471656.165471.54680@e1g2000hsg.googlegroups.com>
Message-ID: <1174476448.257611.54750@l75g2000hse.googlegroups.com>

On Mar 21, 6:07 am, "John Machin" <sjmac... at lexicon.net> wrote:
> On Mar 21, 11:37 am, Carsten Haese <cars... at uniqsys.com> wrote:
>
> > On Tue, 2007-03-20 at 16:47 -0700, Gerry wrote:
> > > I'm still mystified why:
> > >    qno was ever unicode,
>
> > Thus quothhttp://www.lexicon.net/sjmachin/xlrd.html"This module
> > presents all text strings as Python unicode objects."
>
> And why would that be? As the next sentence in the referenced docs
> says, "From Excel 97 onwards, text in Excel spreadsheets has been
> stored as Unicode."
>
> Gerry, your "Q1" string was converted to Unicode when you wrote it
> using pyExcelerator's Worksheet.write() method.
>
> HTH,
> John

John,

   That helps a lot.  Thanks again!

   Gerry



From parsons.nicholas1 at gmail.com  Sun Mar  4 07:36:50 2007
From: parsons.nicholas1 at gmail.com (Nicholas Parsons)
Date: Sun, 4 Mar 2007 07:36:50 -0500
Subject: pop method question
In-Reply-To: <1172979629.812957.156820@i80g2000cwc.googlegroups.com>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
	<1172979629.812957.156820@i80g2000cwc.googlegroups.com>
Message-ID: <38D84AEC-89DD-4591-A8E4-901BD42A5C71@gmail.com>

Hi Jordan,

That is true what you say about pop() behavior with stack-like  
objects.  But the definition of pop() for a stack-like structure is  
stronger than that.  A stack is a LIFO data structure.  Therefore the  
pop() operation is defined to not only mutate the receiver and return  
the item popped but also ensure that the LAST item in the stack is  
removed.  This makes perfect sense for a list type in python since  
lists are mutable sequences that have a specified order.  But for  
dictionaries this does not hold since they are unordered sequences by  
definition.  So for dictionaries it would not make sense for a  
programmer to simulate a stack-like type.

While we're on the subject I'm also curious as to why the author of  
the built-in list class called the method "append" to add an element  
to the end of a list and not something like "push".  But this is not  
really much of a problem if the programmer could create an alias for  
it.  Is it possible to do this in python?  I know you can do it in  
ruby and even override methods and attributes in an existing built-in  
class like String for instance.

--Nick




On Mar 3, 2007, at 10:40 PM, MonkeeSage wrote:

> Nick,
>
> In regards to stack-like objects, pop() implies mutation of the
> reciever and returning the item 'popped' off the stack. The same
> _semantic_ meaning can be used for pop() regarding dictionaries, even
> though the _implementation_ would be different: dict.pop(key) mutates
> the reciever and returns the value associated with the key.
>
> Regards,
> Jordan
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list



From hancock at anansispaceworks.com  Wed Mar 21 06:03:27 2007
From: hancock at anansispaceworks.com (Terry Hancock)
Date: Wed, 21 Mar 2007 05:03:27 -0500
Subject: an enumerate question
In-Reply-To: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
References: <1174354730.832021.263940@p15g2000hsd.googlegroups.com>
Message-ID: <460102EF.4030101@anansispaceworks.com>

eight02645999 at yahoo.com wrote:
> say i want to enumerate lines of a file
> eg
> for n,l in enumerate(open("file")):
>      # print  next line ie

I think you'd find it much easier to move your frame of reference one
line forward and think in terms of remembering the previous line, e.g.:

for n,curr in enumerate(open("file")):
    if n>1:
        print n,curr
        print m,prev
    m,prev = n,curr

Of course, if the file isn't so big, then you could use readlines as you
mention.

Cheers,
Terry

-- 
Terry Hancock (hancock at AnansiSpaceworks.com)
Anansi Spaceworks http://www.AnansiSpaceworks.com



From python at rcn.com  Thu Mar 22 13:21:22 2007
From: python at rcn.com (Raymond Hettinger)
Date: 22 Mar 2007 10:21:22 -0700
Subject: challenge ?
In-Reply-To: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
References: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
Message-ID: <1174584082.591444.71180@y80g2000hsf.googlegroups.com>

On Mar 22, 9:41 am, "alain" <alainpo... at yahoo.fr> wrote:
> I have a problem I wonder if it has been solved before.
> I have a dictionnary and I want the values in the dictionnary to be
> annotated with the rank that would be obtained by sorting the values
>
> def annotate_with_rank(my_dict):
>         ....
>         return my_annotated_dict
>
> In other words, any value a_value would become a 2-tuple
> (a_value,rank_of_a_value)

Try this:

>>> from operator import itemgetter
>>> my_dict = dict(a=10, b=5, c=8, d=12)
>>> for rank, (key, value) in enumerate(sorted(my_dict.items(), key=itemgetter(1))):
...	my_dict[key] = (value, rank)
>>> my_dict
{'a': (10, 2), 'c': (8, 1), 'b': (5, 0), 'd': (12, 3)}



From pyapplico at gmail.com  Wed Mar 28 03:38:38 2007
From: pyapplico at gmail.com (pyapplico at gmail.com)
Date: 28 Mar 2007 00:38:38 -0700
Subject: XML Parsing
Message-ID: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>

I want to parse this XML file:

<?xml version="1.0" ?>

<text>

<text:one>
<file>filename</file>
<contents>
Hello
</contents>
</text:one>

<text:two>
<file>filename2</file>
<contents>
Hello2
</contents>
</text:two>

</text>

This XML will be in a file called filecreate.xml

As you might have guessed, I want to create files from this XML file
contents, so how can I do this?
What modules should I use? What options do I have? Where can I find
tutorials? Will I be able to put
this on the internet (on a googlepages server)?

Thanks in advance to everyone who helps me.
And yes I have used Google but I am unsure what to use.



From tinaweb at bestemselv.com  Thu Mar 15 02:48:24 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Thu, 15 Mar 2007 07:48:24 +0100
Subject: getting user id (from an arbitrary sys user)
In-Reply-To: <mailman.5086.1173887360.32031.python-list@python.org>
References: <mailman.5086.1173887360.32031.python-list@python.org>
Message-ID: <Q7-dnZMkQpelcWXYRVnzvA@telenor.com>

Gerardo Herzig wrote:
> hi all. What i need to know is if there is some function like 
> os.getuid(), but taking an argument (the username, off course), so i can 
> do getuid('myuser')
> 
> Thanks you dudes!
> 
> Gerardo
How about simply:

import commands
userid = commands.getoutput("id -u username")



From will at willNOmcguganSPAM.com  Sat Mar 24 05:14:13 2007
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Sat, 24 Mar 2007 09:14:13 +0000
Subject: execution speed increase after compile py code into exe?
In-Reply-To: <mailman.5545.1174724953.32031.python-list@python.org>
References: <loom.20070324T091014-216@post.gmane.org>
	<mailman.5545.1174724953.32031.python-list@python.org>
Message-ID: <4604ebe7$0$28985$da0feed9@news.zen.co.uk>

Michael Bentley wrote:
>>
>> would there be any speed increase in code execution after python  code 
>> being
>> compiled into exe file with py2exe?
>>
> 
> No.  I would expect slower startup followed by the same code  execution 
> time you'd get from running normally (not that I've  actually tested it, 
> mind you).

Actualy startup is faster for the apps that I have py2exe'd. I think 
this may be because all the modules are in one place and Python doesn't 
have to go searching for them.

Will
--
http://www.willmcgugan.com


From sk at get.it.off.to.reply.z.pl  Thu Mar 22 07:24:20 2007
From: sk at get.it.off.to.reply.z.pl (Sebastian Kaliszewski)
Date: Thu, 22 Mar 2007 12:24:20 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe
	it could be PEP?)
In-Reply-To: <1174488908.420851.303850@y66g2000hsf.googlegroups.com>
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174488447.404840.112960@n76g2000hsh.googlegroups.com>
	<1174488908.420851.303850@y66g2000hsf.googlegroups.com>
Message-ID: <ettomo$f0r$1@bozon2.softax.pl>

dmitrey wrote:
> if you want
> result = func1(func2(arg))
> you should use
> result = func1 (func2 arg)

This is in conflict with current meanig, Ergo it breaks old code

rgds
\SK


From aahz at pythoncraft.com  Wed Mar 14 16:50:06 2007
From: aahz at pythoncraft.com (Aahz)
Date: 14 Mar 2007 13:50:06 -0700
Subject: Python books?
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
	<mailman.4942.1173623618.32031.python-list@python.org>
Message-ID: <et9n5u$q48$1@panix3.panix.com>

In article <mailman.4942.1173623618.32031.python-list at python.org>,
Tommy Nordgren  <tommy.nordgren at comhem.se> wrote:
>>
>	I've found one interesting text book on Python:
>Mark Lutz - Programming Python, 3rd Edition.
>How do you rate it?
>	One of the reasons I find it interesting is because of it's hefty  
>page count
>- over 1500 pages.

Some people prefer shorter books -- Python for Dummies (for new
programmers) and Python in a Nutshell (for experienced programmers) both
try to give a thorough survey of Python while keeping the book easy to
carry.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From andmarti at gmail.com  Mon Mar 19 01:39:01 2007
From: andmarti at gmail.com (andmarti at gmail.com)
Date: Mon, 19 Mar 2007 02:39:01 -0300
Subject: struct.pack returns nothing
In-Reply-To: <1hv6zfk.kpur6sszfqo7N%aleax@mac.com>
References: <mailman.5269.1174281334.32031.python-list@python.org>
	<1hv6zfk.kpur6sszfqo7N%aleax@mac.com>
Message-ID: <20070319053901.GB8746@lacordilleraandina.com.ar>

On Sun, Mar 18, 2007 at 10:22:32PM -0700, Alex Martelli wrote:
> <andmarti at gmail.com> wrote:
> 
> > If I build a strict with:
> > 
> > import struct
> > print struck.pack ('i', 1)
> > 
> > it returns a '\n'.
> > What's wrong with it???
> > :(
> 
> You're trying to print a binary string that's hardly printable as-is.
> Try printing its repr(...) and you'll see all the binary zeros and one
> you crave!-)

Im getting nothing as well.
The unpack seems to work fine though.

-- 
Andr?s M.
---------------------------------------------


From http  Tue Mar 27 19:40:43 2007
From: http (Paul Rubin)
Date: 27 Mar 2007 15:40:43 -0800
Subject: reusing generators
References: <1175038298.730531.283470@p15g2000hsd.googlegroups.com>
Message-ID: <7xslbqcl1g.fsf@ruckus.brouhaha.com>

"kmdaily at gmail.com" <kmdaily at gmail.com> writes:
> Hello, I have a two large files that I need to read in records from
> and compare in a pairwise fashion: Memory is an issue, so I want to
> use a generator to get each record one at a time. However, doing the
> comparisons with nested for loops, the inner generator will run out of
> items. How can I restart the generator from the beginning of the file
> each time through the outer loop? Thanks!

If the files are that large, maybe you want to rethink that quadratic
algorithm.  But if you really want to restart the generator, the
simplest way is just close and re-open the file.


From lbates at websafe.com  Wed Mar 28 18:46:08 2007
From: lbates at websafe.com (Larry Bates)
Date: Wed, 28 Mar 2007 17:46:08 -0500
Subject: Creating a new data structure while filtering its data origin.
In-Reply-To: <mailman.5727.1175117350.32031.python-list@python.org>
References: <mailman.5727.1175117350.32031.python-list@python.org>
Message-ID: <460AF030.5030308@websafe.com>

mmara at fibertel.com.ar wrote:
> Hi everyone.
> 
> I'm trying to work with very simple data structures but I'm stuck in the very first steps. If someone has the luxury of a few minutes and can give an advice how to resolve this, I'll really appreciate it.
> 
> 1- I have a list of tuples like this:
> lista= [(162, 141, 3), (162, 141, 3), (162, 141, 3), (168, 141, 2), (168, 141, 2), (168, 141, 2), (201,  141, 1), (213, 141, 1), (203, 141, 1), (562, 142, 4), (562, 142, 4), (562, 142, 4), (568, 142, 2), (568, 142, 2), (568, 142, 2), (501,  142, 1), (513, 142, 1), (503, 142, 1)]
> and I want to end with a dict like this:
> {141: {1: [203, 213, 201], 2: [168, ], 3: [162, ]}, 142: {1: [503, 513, 501], 2: [568, ], 4: [562, ]}}
>  the logic of the final output:
>  a) the outer dict's key is a set() of the 2rd value of the input.
>  b) the inner dict's key is a set() of the 3th value for tuples which 3rd value equals a). 
>  c) the inner list will be fill up with the 1st value of every tuple which 3rd value equals b) and its 2rd value equals a).
> 
> So far, the only thing it seems I can achieve is the first part:
> outer_dict = dict([(x,dict()) for x in set(row[1] for row in lista)])
> 
>>From then on, I'm starting to get tired after several successful failures (I tried with itertools, with straight loops ...) and I don't know which can be the easier way to get that final output.
> 
> Thanks in advance.
> 
> 

d={}
for a, b, c in lista:
    if d.has_key(b):
        if d[b].has_key(c):
            if a not in d[b][c]: d[b][c].append(a)

        else:
                d[b][c]=[a]
    else:
        d[b]={c:[a]}


print d

-Larry Bates


From jstroud at mbi.ucla.edu  Thu Mar 22 23:55:10 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 22 Mar 2007 20:55:10 -0700
Subject: design question: generator object with other attributes
In-Reply-To: <aLAMh.8608$EA.2582@trnddc07>
References: <aLAMh.8608$EA.2582@trnddc07>
Message-ID: <etvj2u$dtu$1@daisy.noc.ucla.edu>

Alan Isaac wrote:
> Essentially I want a generator that I can query about
> its characteristics.  (E.g., a random number generator
> that I want to be able to ask about is distributional
> parameters.)
> 
> I am thinking of a class that wraps a generator.
> An object of this class will have a ``next`` method that simply
> returns the value the object get by calling the wrapped
> generator.
> 
> A reasonable approach?
> 
> Thanks,
> Alan Isaac
> 
> PS Here is a useless class to illustrate the basic idea
> that you could have both attribute access and a
> generator-connected ``next`` method.
> 
> class Start2Stop:
>         def __init(start,stop):
>                 self.start = start
>                 self.stop = stop
>                 self.numgen = (i for in in xrange(start,stop))
>         def next(self):
>                 return self.numgen.next()
> 
> 
> 

In case you are having problems, "__init(start,stop)" should be spelled 
"__init__(self, start, stop)".

James


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 02:16:44 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 03:16:44 -0300
Subject: Two Command prompts in parallels
References: <09042D621CD4AA479C678463F3A646D0E88B1E@sottemail1.ent.ad.cognos.com>
Message-ID: <op.tpmo16icx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 22 Mar 2007 15:37:58 -0300, Boudreau, Emile  
<Emile.Boudreau at cognos.com> escribi?:

> 	I have two batch files and I'm trying to run them in parallel. I
> haven't been able to find any information on how to make python open 2
> command prompt and then make each prompt run one of the batch files.

Use the subprocess module (or popen2, or os.spawn*)

-- 
Gabriel Genellina



From bearophileHUGS at lycos.com  Thu Mar 29 17:02:53 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 29 Mar 2007 14:02:53 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <1175200851.955161.169930@n76g2000hsh.googlegroups.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175200851.955161.169930@n76g2000hsh.googlegroups.com>
Message-ID: <1175202173.462815.93380@e65g2000hsc.googlegroups.com>

> Python's standard module "ai" has a function called
> "generateFakeReview". I believe it does what you want, but I haven't
> used it myself.

It's nice to have an ai module too in the standard library (A*, CSP,
etc), Norvig may help with the Python version of his AIMA sofware ;-]

Bye,
bearophile



From __peter__ at web.de  Fri Mar  2 04:33:12 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Mar 2007 10:33:12 +0100
Subject: Changing directories in oswalk [was Re: Walk thru each
	subdirectory from a top directory]
References: <1172525300.450438.57080@8g2000cwh.googlegroups.com>
	<1172529799.827628.321760@p10g2000cwp.googlegroups.com>
	<12ua1bo77j0n724@corp.supernews.com>
	<pan.2007.02.28.05.21.12.104751@REMOVEME.cybersource.com.au>
	<es3bf8$h1i$02$1@news.t-online.com>
	<pan.2007.03.01.02.01.53.342057@REMOVEME.cybersource.com.au>
Message-ID: <es8qtt$k1f$02$1@news.t-online.com>

Steven D'Aprano wrote:

> For those times when os.walk's behaviour doesn't mesh well with that of
> the external program you are calling (like macunpack) is there an
> alternative to:
> 
> - save the cwd;
> - change directories;
> - call the program;
> - return to the saved directory
> 
> ?

os.walk() creates paths from the root you provide and the files/direcotories
it finds via os.listdir(), and uses that to determine. If that root is an
absolute path any such paths are absolute, too, and undoing the directory
change is not necessary.

cwd = os.getcwd()
for path, dirs, files in os.walk(os.path.abspath(root)):
    os.chdir(path)
    for file in files:
        invoke external program
os.chdir(cwd)

That said, undoing the change immediately is better style, and probably a
good usecase for a with statement like

with current_working_directory(path):
    invoke external program

Last minute idea:

for path, dirs, files in os.walk(root):
    for file in files:
        os.system("cd '%s' && macunpack '%s'" % (path, file))

Peter



From devrim.erdem at gmail.com  Fri Mar 30 10:16:09 2007
From: devrim.erdem at gmail.com (DE)
Date: 30 Mar 2007 07:16:09 -0700
Subject: Indentation for code readability
In-Reply-To: <euilg3$stf$03$1@news.t-online.com>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<euilg3$stf$03$1@news.t-online.com>
Message-ID: <1175264168.980249.130770@e65g2000hsc.googlegroups.com>

Thanks Peter. This sounds like to right solution for my case, because
in addition to indentation, I can automate push and pop. I'll
investigate this further. I appreciate.



From spe.stani.be at gmail.com  Sat Mar 17 23:41:47 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 17 Mar 2007 20:41:47 -0700
Subject: IDE for wxPython
In-Reply-To: <1174180988.678854.200120@p15g2000hsd.googlegroups.com>
References: <mailman.5235.1174178014.32031.python-list@python.org>
	<1174180988.678854.200120@p15g2000hsd.googlegroups.com>
Message-ID: <1174189307.616454.36030@y66g2000hsf.googlegroups.com>

On Mar 18, 2:23 am, "sleek" <csl... at gmail.com> wrote:
> On Mar 17, 4:12 pm, Ghirai <ghi... at ghirai.com> wrote:
>
> > Hellopython-list,
>
> > Can anyone suggest an IDE for wxPython?
> > Or an IDE for TkInter?
>
> > Thanks.
>
> > --
> > Best regards,
> > Ghirai.
>
> You might want to check outSPE. It's a greatPythonIDE.http://pythonide.blogspot.com/

The latest version SPE 0.8.4 is currently only available through
subversion and will hopefully be released on the 1st of april:
svn checkout svn://svn.berlios.de/python/spe/trunk/_spe

Stani
--
http://pythonide.stani.be



From lew at nospam.lewscanon.com  Fri Mar 30 09:07:05 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Fri, 30 Mar 2007 09:07:05 -0400
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460cca34$0$8723$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <kKCdnbOHbYrklpDbnZ2dnUVZ_oDinZ2d@comcast.com>

Xah Lee wrote:
>> public class test {
>>   public static void main(String[] args) {
>>     String a = new String("a string");
>>     String b = new String("another one");
>>     StringBuffer c = new StringBuffer(40);
>>     c.append(a); c.append(b);
>>     System.out.println(c.toString());
>>     }
>> }
> 
> Er. How about
> 
> public class test {
>   public static void main(String[] args) {
>     String a = "a string";
>     String b = "another one";
>     StringBuffer c = a + b;
>     System.out.println(c);
>     }
> }

bugbear wrote:
> Alternatively I could recode your Lisp example
> as badly as you coded your Java.

 From what I've seen and heard of Xah Lee, you'd probably lose the bad-coding 
competition to him. He's a professional.

-- Lew


From nagle at animats.com  Fri Mar 16 15:16:52 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 16 Mar 2007 19:16:52 GMT
Subject: MySQLdb collectable memory leak
Message-ID: <E2CKh.7942$yW.1524@newssvr11.news.prodigy.net>

It's not big, but it's there.  Just attaching to a MySQL
database with MySQLdb, then closing the connection without
doing anything results in some collectable garbage:

gc: collectable <cell 00DCDB30>
gc: collectable <function 00DC2D70>
gc: collectable <tuple 00DBAD78>
gc: collectable <tuple 00D73790>
gc: collectable <dict 00E81150>

(Python 2.4, MySQL 5, Windows 2000)

(For test purposes, I run with GC turned off, so if any
memory leaks, collectable or otherwise, are introduced, they're noticed.)

				John Nagle


From http  Tue Mar 27 18:28:06 2007
From: http (Paul Rubin)
Date: 27 Mar 2007 14:28:06 -0800
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
Message-ID: <7xodme724p.fsf@ruckus.brouhaha.com>

Nick Craig-Wood <nick at craig-wood.com> writes:
> It could be made to work I'm sure by getting the interpreter to check
> for timeouts every few hundred bytecodes (like it does for thread
> switching).

Is there some reason not to use sigalarm for this?


From michele.simionato at gmail.com  Mon Mar 12 11:39:27 2007
From: michele.simionato at gmail.com (Michele Simionato)
Date: 12 Mar 2007 08:39:27 -0700
Subject: nonlinear interpolation
Message-ID: <1173713226.412811.302180@c51g2000cwc.googlegroups.com>

I want to interpolate a data distribution with a function depending on
various parameters; the function
can be a Gaussian, a Breit-Wigner, a custom function. Where should I
look? I am getting lost
between matplotlib, numeric, numpy, scientific python, scipy, etc.
etc.
Any pointer would be well received :)

      Michele Simionato



From B.Ogryczak at gmail.com  Fri Mar 30 09:29:45 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 30 Mar 2007 06:29:45 -0700
Subject: How to get the demension of a video file?
In-Reply-To: <1175248588.710143.313090@o5g2000hsb.googlegroups.com>
References: <1175248588.710143.313090@o5g2000hsb.googlegroups.com>
Message-ID: <1175261385.401071.30450@n76g2000hsh.googlegroups.com>

On Mar 30, 11:56 am, "seppl43" <sepp... at southstore.de> wrote:
> Hello there,
>
> does anybody know, how to get the dimension values (width/height) of a
> quicktime (.mov) and/or a avi-file?
> Is there perhaps a module which can do this job?

Identify from ImageMagick. There is a Python binding (PythonMagick,
don't get it confused with PyMagic, which is no longer supported).
http://www.imagemagick.org/script/api.php#python



From michael at jedimindworks.com  Fri Mar 30 19:17:23 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Fri, 30 Mar 2007 18:17:23 -0500
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <0D9C1096-834C-4904-8434-96943A92A01D@jedimindworks.com>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
	<mailman.5793.1175281775.32031.python-list@python.org>
	<1175290917.509860.224250@o5g2000hsb.googlegroups.com>
	<0D9C1096-834C-4904-8434-96943A92A01D@jedimindworks.com>
Message-ID: <3D6B07EB-765D-4465-949A-6C736774B9DE@jedimindworks.com>


On Mar 30, 2007, at 5:42 PM, Michael Bentley wrote:
> for i in yourstring.split():
> 	if i[0].isdigit():
> 		yourstring = yourstring.replace(i, '-%s' % (i,), 1)

*OR*

yourstring ' '.join(x[0].isdigit() and '-%s' % x or x for x in  
yourstring.split())

;-)




From duncan.booth at invalid.invalid  Sun Mar 11 13:21:10 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 11 Mar 2007 17:21:10 GMT
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
Message-ID: <Xns98F0B0821C330duncanbooth@127.0.0.1>

"Mark Dickinson" <dickinsm at gmail.com> wrote:

> I guess what's happening is that there's some optimization that avoids
> creating two separate float objects for a float literal that appears
> twice, and that optimization doesn't see the difference between 0. and
> -0. 

Don't guess. Test.

>>> def f():
	x = 0.0
	y = -0.0
	return x, y

>>> dis.dis(f)
  2           0 LOAD_CONST               1 (0.0)
              3 STORE_FAST               0 (x)

  3           6 LOAD_CONST               1 (0.0)
              9 STORE_FAST               1 (y)

  4          12 LOAD_FAST                0 (x)
             15 LOAD_FAST                1 (y)
             18 BUILD_TUPLE              2
             21 RETURN_VALUE        

Yes. Just the one constant there.


Tim Peters wrote in 
http://blog.gmane.org/gmane.comp.python.devel/day=20050409:

> All Python behavior in the presence of a NaN, infinity, or signed zero
> is a platform-dependent accident.  This is because C89 has no such
> concepts, and Python is written to the C89 standard.  It's not easy to
> fix across all platforms (because there is no portable way to do so in
> standard C), although it may be reasonably easy to fix if all anyone
> cares about is gcc and MSVC (every platform C compiler has its own set
> of gimmicks for "dealing with" these things).



From steve at holdenweb.com  Wed Mar 14 08:19:00 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 08:19:00 -0400
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <12vf1cjtn2v6s0b@corp.supernews.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>	<mailman.5045.1173827319.32031.python-list@python.org>	<SZHJh.38$07.36@newsfe12.lga>
	<12vf1cjtn2v6s0b@corp.supernews.com>
Message-ID: <et8pa9$a1f$1@sea.gmane.org>

Scott David Daniels wrote:
> Bart Willems wrote:
>> ...
>> I always try to stay away from 'negative' operators if possible, to 
>> improve readability:
>>
>> while True:
>>    hint = raw_input('\nAre you stuck? y/n: ').lower()
>>    if hint = 'y' or hint = 'n':
>>       break
>>    else:
>>       print 'Please answer yes or no'
> 
> And if you really want to see what is going wrong, replace that last by:
>          print 'Please answer yes or no (not %r):' % hint
> 
Better still, use

   Please answer y or n

since those are the values you are testing for ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From nagle at animats.com  Wed Mar  7 18:08:53 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 07 Mar 2007 15:08:53 -0800
Subject: merits of Lisp vs Python
In-Reply-To: <XPGHh.1336$_a1.998@bignews7.bellsouth.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
Message-ID: <eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>

Brian Adkins wrote:
> George Sakkis wrote:
> 
>> JShrager at gmail.com wrote:
>>
>>> 1. Lisp is the only industrial strength language

    Neither Lisp nor Python is an "industrial strength language".
The infrastructure is too weak.  Hosting providers and distro
makers aren't concerned over whether Python works.  They
care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
Ask them.

				John Nagle


From python at rcn.com  Mon Mar  5 02:44:16 2007
From: python at rcn.com (Raymond Hettinger)
Date: 4 Mar 2007 23:44:16 -0800
Subject: list-like behaviour of etree.Element
In-Reply-To: <mailman.4658.1173041314.32031.python-list@python.org>
References: <mailman.4658.1173041314.32031.python-list@python.org>
Message-ID: <1173080656.077853.249520@8g2000cwh.googlegroups.com>

On Mar 4, 12:48 pm, "Daniel Nogradi" <nogr... at gmail.com> wrote:
> The etree.Element (or ElementTree.Element) supports a number of
> list-like methods: append, insert, remove. Any special reason why it
> doesn't support pop and extend (and maybe count)?

Those methods would not be hard to add.  Perhaps, submit a feature
request to Fredrik Lundh on SourceForge and see what he thinks there
is merit in more closely emulating the list API.  Of the methods you
listed, the case is probably strongest for extend().


Raymond



From adtvff at yahoo.com  Wed Mar 21 08:19:28 2007
From: adtvff at yahoo.com (adtvff at yahoo.com)
Date: 21 Mar 2007 05:19:28 -0700
Subject: flattening/rolling up/aggregating a large sorted text file
Message-ID: <1174479568.427193.132740@n59g2000hsh.googlegroups.com>

Hi,

Given a large ascii file (delimited or fixed width) with one ID field
and dimensions/measures fields, sorted by dimensions, I'd like to
"flatten" or "rollup" the file by creating new columns: one for each
combination of dimension level, and summing up measures over all
records for a given ID.

If the wheel has already been invented, great, please point me in the
right direction. If not, please share some pointers on how to think
about this problem in order to write efficient code.

Is a hash with dimension level combinations a good approach, with
values reset at each new ID level?

I know mysql, Oracle etc will do this , but they all have a cap on #
of columns allowed. SAS will allow unlimited columns, but I don't own
SAS.

Thanks.


ID,color,shape,msr1
------------------------------
001, blue, square,  4
001, red , circle,    5
001, red,  circle,    6


ID, blue_circle, blue_square, red_circle, red_square
--------------------------------------------------------------------------
001,0,4,11,0
002 ...



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 04:31:20 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 06:31:20 -0300
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
Message-ID: <op.tou52irjx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 06:17:37 -0300, Gerard Flanagan  
<grflanagan at yahoo.co.uk> escribi?:

> @onfail(False)
> def a(x):
>     if x == 1:
>         return 'function a succeeded'
>     else:
>         raise

I know it's irrelevant, as you use a bare except, but such raise looks a  
bit ugly...

-- 
Gabriel Genellina



From lew at nospam.lewscanon.com  Thu Mar 29 18:19:44 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Thu, 29 Mar 2007 18:19:44 -0400
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <x7odmbbtdl.fsf@mail.sysarch.com>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<460c30b1$0$8750$ed2619ec@ptn-nntp-reader02.plus.net>
	<x7odmbbtdl.fsf@mail.sysarch.com>
Message-ID: <OqmdnRDEgr8cppHbnZ2dnUVZ_u_inZ2d@comcast.com>

Uri Guttman wrote:
> please DO NOT EVER followup xah's posts into comp.lang.perl.misc. he is
> not wanted there and is considered a troll. he hates perl so why he
> crossposts there is a question. if you want to followup, post only in
> your own group. keep him and his useless threads out of c.l.p.misc.

We've heard similar reports about Xah Lee on other newsgroups as well.

-- Lew


From sigzero at gmail.com  Sat Mar 24 13:30:28 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 24 Mar 2007 10:30:28 -0700
Subject: Removing Python 2.4.4 on OSX
Message-ID: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>

I want to upgrade to 2.5 but I don't see any unistall instructions
anywhere.

Robert



From __peter__ at web.de  Thu Mar 22 09:47:35 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 Mar 2007 14:47:35 +0100
Subject: fine grain logging cotrol
References: <mailman.5451.1174567188.32031.python-list@python.org>
Message-ID: <etu19j$nqi$03$1@news.t-online.com>

Eric S. Johansson wrote:

> I need to to be able to conditionally log based on the method the log
> statement is in and one other factor like a log level.  in order to do
> so, I need to be able to automatically find out the name of the method
> and its class but I haven't found out how to do that yet.
> 
> for example,
> 
> class catus(Felis):
>    def Siamese_cat( yowl, purr, demand_food):
> 
>      ...
>      log("state of litter box %s"% litter_box.smell, level = 1)
> 
> 
> If the table of methods logged contains "catus.Siamese_cat", then I
> would expect to see the output of the log statements in a log file.  If
> not then I wouldn't see anything in the log.
> 
> Has somebody done this already?  Is it even possible to do without
> manually adding the class and method information for every log statement?
> 
> a related question is using signals for reloading configurations etc.  I
> have to find any good examples of how to use signals to cause a
> long-running process to reload external data.  Any good pointers?

Instead of rolling your own, use the logging package which can handle
everything but the class info out of the box (levels are spelt as method
names info(), warn() etc.).

import logging

class LoggedType(type):
    def __new__(mcl, name, bases, classdict):
        classdict["logger"] = logging.getLogger(name)
        return type.__new__(mcl, name, bases, classdict)

class Felis:
    __metaclass__ = LoggedType
    def alpha(self):
        self.logger.info("felis-alpha")

class Catus(Felis):
    def alpha(self):
        self.logger.info("catus-alpha")
    def beta(self):
        self.logger.info("catus-beta")

if __name__ == "__main__":
    logging.basicConfig(format="%(name)s.%(funcName)s: %(message)s",
level=logging.INFO)
    f = Felis()
    f.alpha()
    c = Catus()
    c.alpha()
    c.beta()

If the metaclass bothers you, here's a simpler alternative:

class Felis(object):
    logger = logging.getLogger("Felis")
    def alpha(self):
        self.logger.info("felis-alpha")

class Catus(Felis):
    logger = logging.getLogger("Catus")
    def alpha(self):
        self.logger.info("catus-alpha")
    def beta(self):
        self.logger.info("catus-beta")

Peter




From bytesman at gmail.com  Sat Mar 31 04:51:54 2007
From: bytesman at gmail.com (eriq)
Date: 31 Mar 2007 01:51:54 -0700
Subject: Send Anti-Flickering off to logitech cam
Message-ID: <1175331114.868684.96390@y80g2000hsf.googlegroups.com>

Hi,

I am currently working with a Logitech Quickcam STX via USB. Using the
VideoCapture module to make pictures. Because the camera is outside I
will have to turn off a special Option on the camera called "Anti-
Flickering". Is there anyway that I can send a hardware seq to the cam
to do this. Or manipulate the driver (Accessed via DirectX). Any
ideals what path I should follow to achieve this?

Thx

bytesman



From rowen at cesmail.net  Tue Mar  6 15:02:44 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Tue, 06 Mar 2007 12:02:44 -0800
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
	<1173199320.094675.58350@p10g2000cwp.googlegroups.com>
	<mailman.4722.1173200207.32031.python-list@python.org>
	<1173201871.742845.84040@t69g2000cwt.googlegroups.com>
	<mailman.4724.1173202470.32031.python-list@python.org>
	<1173205801.346941.201060@8g2000cwh.googlegroups.com>
Message-ID: <rowen-213C94.12024406032007@gnus01.u.washington.edu>

In article <1173205801.346941.201060 at 8g2000cwh.googlegroups.com>,
 "Martin Unsal" <martinunsal at gmail.com> wrote:

> On Mar 6, 9:34 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > It assumes that util.common is a module thats on the PYTHONPATH.
> 
> Now we're getting somewhere. :)
> 
> > The common way to ensure that this is the case is either to handle
> > util as a separate project, and install it into the system
> > site-packages just as you would any third party package,
> 
> This breaks if you ever need to test more than one branch of the same
> code base. I use a release branch and a development branch. Only the
> release branch goes into site-packages, but obviously I do most of my
> work in the development branch.

This is an interesting point that we are just facing. If you have a big 
package for all your stuff and you want to separately version components 
of it, you do run into problems. The solution we are adopting is to 
write a custom import hook, but a simpler solution is to make sure each 
separately versioned component is a top-level package (in which case you 
can manipulate PYTHONPATH to temporarily "install" a test version).

-- Russell


From robin at alldunn.com  Fri Mar 23 15:47:53 2007
From: robin at alldunn.com (Robin Dunn)
Date: Fri, 23 Mar 2007 12:47:53 -0700
Subject: ANN: wxPython 2.8.3.0
Message-ID: <46042EE9.10302@alldunn.com>

Announcing
----------

The 2.8.3.0 release of wxPython is now available for download at
http://wxpython.org/download.php.  This release includes a number of
bug fixes and also some new enhancements, including updates to the
XRCed tool and the new InspectionTool.

Source code is available, as well as binaries for both Python 2.4 and
2.5, for Windows and Mac, as well some pacakges for various Linux
distributions.  A summary of changes is listed below and also at
http://wxpython.org/recentchanges.php.


What is wxPython?
-----------------

wxPython is a GUI toolkit for the Python programming language. It
allows Python programmers to create programs with a robust, highly
functional graphical user interface, simply and easily. It is
implemented as a Python extension module that wraps the GUI components
of the popular wxWidgets cross platform library, which is written in
C++.

wxPython is a cross-platform toolkit. This means that the same program
will usually run on multiple platforms without modifications.
Currently supported platforms are 32-bit Microsoft Windows, most Linux
or other Unix-like systems using GTK2, and Mac OS X 10.3+, in most
cases the native widgets are used on each platform to provide a 100%
native look and feel for the application.


Changes in 2.8.3.0
------------------

Added wx.ToolBar.SetToolNormalBitmap and SetToolDisabledBitmap
methods.  (Keep in mind however that the disabled bitmap is currently
generated on the fly by most native toolbar widgets, so this
SetToolDisabledBitmap method won't have any affect on them...)

Refactored the inspection tool such that it can be used as a wx.App
mix-in class as it was used before (with the wx.lib.mixins.inspect
module) and also as a non mix-in tool (using 
wx.lib.inspect.InspectionTool).

Add wx.lib.mixins.treemixin from Frank Niessink.

Added the wx.SizerFlags class, and also added AddF, InsertF and
PrependF methods to wx.Sizer.  The wxSizerFlags class provides a
convienient and easier to read way to add items to a sizer.  It was
added as a new set of methods of the wx.Sizer class so as to not
disturb existing code.  For example, instead of writing::

     sizer.Add(ctrl, 0, wx.EXPAND | wx.ALL, 10)

you can now write::

     sizer.AddF(ctrl, wx.SizerFlags().Expand().Border(wx.ALL,10))


Will Sadkin provided a patch for the wx.lib.masked package that fixes
its support for using the navigation keys on the numeric keypad.

wx.lib.plot: patch #1663937 to allow user to turn off scientific
notation on plot.

wxGTK: Most of the remaining TODOs for the wx.GraphicsContext on wxGTK
have been done.  This includes implementations for GetTextExtent,
Clip, DrawBitmap, fixing the drawing position of text to be at the
upper left corner instead of the baseline, etc.

wx.lib.customtreectrl patches from Andrea:

   1. ExpandAll has been renamed as ExpandAllChildren, and the new
      ExpandAll now takes no input arguments (consistent with
      wx.TreeCtrl)

   2. ctstyle keyword is now defaulted to 0: every style related to
      CustomTreeCtrl and the underlying wx.PyScrolledWindow should be
      declared using the keyword "style" only. For backward
      compatibility, ctstyle continues to work as I merged ctstyle and
      style in the __init__ method.

   3. GetClassDefaultAttributes is now a classmethod.

   4. UnselectAll bug fixed.


Renamed the wx.lib.inspect and wx.lib.mixins.inspect modules to
inspection, in order to avoid conflicts with the inspect module in the
standard Python library.

Lots of changes to XRCed from Roman Rolinsky:


   * Preferences for default "sizeritem" parameters for new panels and
     controls can be configured ("File">"Preferences...").

   * Implemented comment object for including simple one-line comments
     and comment directives as tree nodes. No validation is performed
     for a valid XML string so comments must not contain "-->". Comment
     directive is a special comment starting with '%' character,
     followed by a line of python code. It is executed using 'exec'
     when the resource file is opened. This is useful to import plugin
     modules containing custom handlers which are specific to the
     resource file, hovewer this is of course a security hole if you
     use foreign XRC files. A warning is displayed if the preference
     option 'ask' is selected (by default).

   * Added support for custom controls and plugin modules. Refer to
     this wxPythonWiki for the details:
     http://wiki.wxpython.org/index.cgi/XRCed#custom

   * Tool panel sections can be collapsed/expanded by clicking on the
     label of a tool group.

   * Some undo/redo and other fixes.

   * Fixes for wxMSW (notebook highlighting, control sizes, tree
     Unselect).

   * Notebook page highlighting fix. Highlight resizes when the window
     is resized. ParamUnit spin button detects event handler re-entry
     (wxGTK probably has a bug in wxSpinButton with repeated events).

   * Fix for dealing with empty 'growable' property, using MiniFrame
     for properties panel, the panel is restored together with the main
     window.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!



From aleax at mac.com  Mon Mar 19 01:22:32 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 22:22:32 -0700
Subject: struct.pack returns nothing
References: <mailman.5269.1174281334.32031.python-list@python.org>
Message-ID: <1hv6zfk.kpur6sszfqo7N%aleax@mac.com>

<andmarti at gmail.com> wrote:

> If I build a strict with:
> 
> import struct
> print struck.pack ('i', 1)
> 
> it returns a '\n'.
> What's wrong with it???
> :(

You're trying to print a binary string that's hardly printable as-is.
Try printing its repr(...) and you'll see all the binary zeros and one
you crave!-)


Alex



From kyosohma at gmail.com  Fri Mar 30 11:54:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 08:54:45 -0700
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
Message-ID: <1175270085.596596.185280@o5g2000hsb.googlegroups.com>

On Mar 30, 10:38 am, "kevinliu23" <kevinli... at gmail.com> wrote:
> Hey guys,
>
> I want to be able to insert a '-' character in front of all numeric
> values in a string. I want to insert the '-' character to use in
> conjunction with the getopt.getopt() function.
>
> Rigt now, I'm implementing a menu system where users will be able to
> select a set of options like "2a 3ab" which corresponds to menu
> choices. However, with getopt.getopt(), it'll only return what I want
> if I input -2a -3ab as my string. I don't want the user have to insert
> a '-' character in front of all their choices, so I was thinking of
> accepting the string input first, then adding in the '-' character
> myself.
>
> So my qusetion is, how do I change:
>
> "2a 3ab" into "-2a -3ab".
>
> Regular expressions? :/

Regular expressions would definitely work. Here's a hack though:

tempInput = '2a 3ab'
tempLst = tempInput.split(' ')

output = ''
for i in tempLst:
   output += ('-' + i + ' ')


I'm sure there are many better and more elegant hacks than this.

Mike



From silverburgh.meryl at gmail.com  Sat Mar 31 23:12:56 2007
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 31 Mar 2007 20:12:56 -0700
Subject: re.findall() hangs in python
Message-ID: <1175397176.567214.194810@n59g2000hsh.googlegroups.com>

Hi,

I have the following regular expression.
It works when 'data' contains the pattern and I see 'match2' get print
out.
But when 'data' does not contain pattern, it just hangs at
're.findall'

pattern = re.compile("(.*)<img (.*?) src=\"(.*?)img(.*?)\"(.*?)",
re.S)

        print "before find all"

        match = re.findall(pattern, data)

        if (match):
           print "match2"



Can you please tell me why it that?



From exarkun at divmod.com  Mon Mar 19 08:41:37 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Mon, 19 Mar 2007 07:41:37 -0500
Subject: Still the __new__ hell ...
In-Reply-To: <45fe7f46$0$2138$426a74cc@news.free.fr>
Message-ID: <20070319124137.18920.968075532.divmod.quotient.3932@ohm>

On Mon, 19 Mar 2007 13:17:11 +0100, Bruno Desthuilliers 
>
> [snip]
>
>And what if it's a unicode string ?
>The correct idiom here is:
>                  if isinstance(year, basestring):
>
>> 			year,month,day=map(int,string.split(year,'-'))
>                         year, month, day = map(int, year.split('-'))

And what if it's another kind of string?  The correct idiom is:

   try:
       parts = year.split('-')
   except AttributeError:
       # Handle int case
   else:
       year, month, day = map(int, parts)

>
>> 		if year < 100:
>> 			year += 2000
>> 		return date.__new__(cls,year,month,day)
>>
>(snip)
>--
>http://mail.python.org/mailman/listinfo/python-list
>


From nogradi at gmail.com  Sun Mar 18 13:12:25 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 18 Mar 2007 18:12:25 +0100
Subject: list comprehension help
In-Reply-To: <e04d2e90703180938y5401c765h41e286a15caceca1@mail.gmail.com>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<5f56302b0703180924o3ebf61e2nb2d50280456f8448@mail.gmail.com>
	<e04d2e90703180938y5401c765h41e286a15caceca1@mail.gmail.com>
Message-ID: <5f56302b0703181012t6ab225a3je6375ca539451b58@mail.gmail.com>

> > > I need to process a really huge text file (4GB) and this is what i
> > > "list comprehension" can fast up things. Can you point out how to do
> > > f = open('file.txt','r')
> > > for line in f:
> > >         db[line.split(' ')[0]] = line.split(' ')[-1]
> > >         db.sync()
> >
> > What is db here? Looks like a dictionary but that doesn't have a sync method.
>
> db is a handle for Berkely db that i open with import bsddb
>
> import bsddb
> db=bsddb.hashopen('db_filename')
>
> > If the file is 4GB are you sure you want to store the whole thing into
> > memory?
>
> I dont want to load it in memory. Once I call the sync() function it
> get synced to the disk, and it is not loaded completely.
>
> > use list comprehension like this:
> > db = [ line.split(' ')[-1] for line in open('file.txt','r') ]
> > or
> > db = [ ( line.split(' ')[0], line.split(' ')[-1] ) for line in
> > open('file.txt','r') ]
> >
> > depending on what exactly you want to store.
>
> line.split(' ')[0] is the key and line.split(' ')[-1] is the value.
> THat is what I want to store.
> Will the second line comprehension work in this case?

No, I don't think so. I gave that example because you wanted to use
list comprehension and I didn't know what db is but as the name says
it is for lists. Since the bsddb handle is not a list I'm afraid you
won't be able to use list comprehension.

This small thing will speed up your loop but since syncing is IO bound
it won't give you much (the timeit module will tell you how much you
save, if at all):

for line in f:
    sp = line.split
    db[sp(' ')[0]] = sp(' ')[-1]
    db.sync( )

HTH,
Daniel


From vorticitywolfe at gmail.com  Sun Mar 25 16:02:02 2007
From: vorticitywolfe at gmail.com (vorticitywolfe at gmail.com)
Date: 25 Mar 2007 13:02:02 -0700
Subject: Save time processing netcdf
Message-ID: <1174852922.541284.23480@n59g2000hsh.googlegroups.com>

Hello,

I am working with a netcdf file and trying to remove a long string
from it e.g.
"KAST BLAH BLAH BLAH BLAH DATA BLAH DATA BLAH BLAH BLAH BLAH BLAH DATA
BLAH DATA BLAH"

Right now what I have works, but takes a long time to run... I think
this could be cut down to a quick 2 second run, but now takes around 5
minutes primarily because of the problem described below...

Why can't I use something like line 9 to get the entire string (which
returns [0], not
["KAST BLAH BLAH BLAH BLAH DATA BLAH DATA BLAH BLAH BLAH BLAH BLAH
DATA BLAH DATA BLAH"])? Rather I have to loop through it grabbing one
character at a time which drastically increases the processing time
and is very cumbersome.

Any one have any ideas or suggestions?


0 #OPEN NetCDF FILE TO READ
1			allDimNames=file.dimensions.keys()
2      		       max_string_length=file.dimensions['maxstringLen']
3			variableNames=file.variables.keys()
4			globalAttList=dir(file)
5			globalAttValue=getattr(file,'filePeriod')
6
7#GRABS DATA FROM STRING (2 DIMENSIONAL ARRAY) WITH THE CHARACTERS AS
INDIVIDUAL 8ELEMENTS
9			#YOU CAN'T JUST SPECIFY DATA VALUES DATA[0][0:max_string_length]
10			data=file.variables['rawstring'].getValue()
11			num_stations=data.shape
12			station_id=[str(mz)]
13
14			for m in station_id:
15				station_id=m
16				prec=[]
17				temps=[]
18
19				#Cycles through all of the stations in the file (LARGE ARRAY!!)
20				for k in range(num_stations[0]):
21					#Finds a certain station
22					if data[k][6]=='K' and data[k][7]==station_id[0:1] and data[k]
[8]==station_id[1:2] and 23data[k][9]==station_id[2:3] and data[k]
[15]=='5' or data[k][6]=='K' and data[k][7]==station_id[0:1] and
24data[k][8]==station_id[1:2] and data[k][9]==station_id[2:3] and
data[k][15]=='4':
25
26							#SEPARATES STRING CHARACTER BY CHARACTER ONLY WAY I'VE 27BEEN
ABLE TO FIGURE OUT HOW TO READ ENTIRE STRING INTO A STRING
28							for j in range(max_string_length):
29								prec.append(str(data[k][j]))
30							S= ''.join(prec)
31		# # # 					##THEN RIP OFF THE WHITESPACE AT THE RIGHT OF THE
STRING
32							code=S.rstrip("\0")
33

Thanks for any of your help!



From gdamjan at gmail.com  Thu Mar 29 20:10:00 2007
From: gdamjan at gmail.com (Damjan)
Date: Fri, 30 Mar 2007 02:10:00 +0200
Subject: PyPy for dummies
Message-ID: <460c5515$0$90269$14726298@news.sunsite.dk>

.. like me.

Ok, this is what I understood why PyPy is important.

Writing programing languages and implementations (compilers, interpreters,
JITs, etc) is hard. Not many people can do it from scratch and create
something comparable to what's available today. But we need people with new
aproaches, exploring new ideas (to boldly go where no hacker has gone
before). 

Also, evolving the current Python language and implementation is not easy
either. As it becomes more complex, it's hard for newcomers to comprehend
it as a whole, and as it is still harder and harder to work on details
without understanding the whole.


What PyPy provides is, making this easier, thus allowing for:
*rapid turnaround* of language features and implementation details - this
enables easier experimentation and testing of wild ideas. Most of them will
fail of course, but some will succed and some will succed and suprise
(NOBODY expects the Spanish Inquisition!).

So that's how I see PyPy ... at the same time an interesting - let's call
it - academic experiment, but also something very close to beeing usefull
at the level of the current CPython.



-- 
damjan


From tuomas.vesterinen at pp.inet.fi  Wed Mar 21 07:03:39 2007
From: tuomas.vesterinen at pp.inet.fi (Tuomas)
Date: Wed, 21 Mar 2007 11:03:39 GMT
Subject: Exceptions and unicode messages
Message-ID: <fi8Mh.84$Ub6.17@read3.inet.fi>

This works:
 >>> raise StandardError(u'Wrong type')
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
StandardError: Wrong type

but don't in Finnish:
 >>> raise StandardError(u'V??r? tyyppi')
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
StandardError>>>
 >>>

Any solution in Python?

TV


From marco at waven.com  Sun Mar  4 08:48:40 2007
From: marco at waven.com (Marco)
Date: Sun, 4 Mar 2007 21:48:40 +0800
Subject: Hey! A VERY c00l feature of X and mplayer(could bind to PyQt4)
Message-ID: <5c62a320703040548m4e6b0e84u521336316e6b4581@mail.gmail.com>

I found a Very c00l feature, that you can write your own MPlayer GUI.

The core is Xembed (http://www.freedesktop.org/wiki/Standards/xembed-spec)
And Of course MPlayer support it as its para: -wid

I hope you like it!

-- 
LinuX Power


From paul at boddie.org.uk  Wed Mar 14 11:58:57 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 14 Mar 2007 08:58:57 -0700
Subject: most complete xml package for Python?
In-Reply-To: <45F811A3.1050208@web.de>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
Message-ID: <1173887937.251026.175260@y66g2000hsf.googlegroups.com>

On 14 Mar, 16:15, Stefan Behnel <stefan.behnel-n05... at web.de> wrote:
> metaperl wrote:
> > Without even checking them all out, I'm thinking the Amara XML Toolkit
> > must be the most feature-packed.
>
> Please check out lxml before you post FUD like this.
>
> http://codespeak.net/lxml/

Calm down, Stefan! The inquirer must have got the impression of
Amara's superiority from somewhere; all you need to do is to discover
which resource gave that impression and balance the situation out. In
any case, it's an opinion: there's no fear involved, and the only
uncertainty and doubt are in the inquirer's mind, which I suppose is
why they posted the inquiry.

Paul



From steve at holdenweb.com  Thu Mar 22 07:56:38 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 07:56:38 -0400
Subject: Python Oracle 10g odbc blob insertion problem
In-Reply-To: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
References: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>
Message-ID: <ettr09$dpb$1@sea.gmane.org>

Godzilla wrote:
> Dear all,
> 
> I cannot find a solution for my problem with inserting a blob object
> (>4000 in length) into an ORACLE database via ODBC.
> 
> 
> I have tried the two ways of inserting the blob object (a zip file):
> 
> 
> 1)
> fp = open("c:/test/test.zip", "r+b")
> data = fp.read()
> s = odbc.odbc(cs)
> qry = s.cursor()
> qry.execute("Insert into tBlob (data) values ('%s')" %
> data.encode('hex'))
> 
> 
> return the error: Input String Too Long Limit: 4096
> 
> 
> 2)
> qry.execute("Insert into tBlob (data) values (?)",
> data.encode('hex'))
> 
> 
> does not return error, but it does not insert the record correctly.
> 
> 
> Any help will be fully appreciated...
> 
I would certainly recommend that you think about using the cxOracle 
package rather than relying on odbc. Most Orcale users do, with evident 
satisfaction.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From cedb816 at yahoo.com  Sun Mar 11 08:21:03 2007
From: cedb816 at yahoo.com (ce)
Date: 11 Mar 2007 05:21:03 -0700
Subject: a better solution for GUI in python
In-Reply-To: <7xmz2kq929.fsf@ruckus.brouhaha.com>
References: <1173611016.810735.70700@30g2000cwc.googlegroups.com>
	<7xmz2kq929.fsf@ruckus.brouhaha.com>
Message-ID: <1173615663.082258.302130@8g2000cwh.googlegroups.com>

On Mar 11, 3:05 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "ce" <cedb... at yahoo.com> writes:
> > My company is using python currently for our website. We need to
> > develop a GUI front-end for our ERP that would be portable (Windows
> > and Linux).
>
> Some reason not to use a browser interface instead of a client gui?

it is a matter of input speed only!
every record posses some calculations and sometimes fresh data from
the database! which i "think" would be slower in the browser than the
local gui client.
I know that i can implement the functionality in the browser using
javascripts, however, i don't know wither it would be as effective as
a local gui or not and which is more convenient.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 08:11:09 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 13:11:09 +0100
Subject: List to string
In-Reply-To: <1174192714.014092.79380@l77g2000hsb.googlegroups.com>
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
	<1174192714.014092.79380@l77g2000hsb.googlegroups.com>
Message-ID: <45fe7ddc$0$25292$426a34cc@news.free.fr>

Hitesh a ?crit :
> On Mar 18, 12:28 am, "Hitesh" <hitesh... at gmail.com> wrote:
>> Hi,
>>
>> I've a list like this..
>> str1 = ['this is a test string inside list']
>>
>> I am doing it this way.
>>
>> for s in str1:
>>     temp_s = s
>>     print temp_s

Why this useless temp_s var ?

>>
>> Any better suggestions?
>>
>> Thank you,
>> hj
> 
> I want to cast value of a list into string..
> 

There's no "cast" in Python. It would make no sens in a dynamically 
typed language, where type informations belong to the LHS of a binding, 
not the RHS.

I guess that what you want is to build a string out of a list of 
strings. If so, the answer is (assuming you want a newline between each 
element of the list):

print "\n".join(str1)


From jstroud at mbi.ucla.edu  Fri Mar  2 17:10:20 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Fri, 02 Mar 2007 14:10:20 -0800
Subject: class attrdict
In-Reply-To: <hbf.20070302nsi@bombur.uio.no>
References: <hbf.20070302nsi@bombur.uio.no>
Message-ID: <esa7cc$bj9$1@daisy.noc.ucla.edu>

Hallvard B Furuseth wrote:
> Does this class need anything more?
> Is there any risk of a lookup loop?
> Seems to work...
> 
> class attrdict(dict):
>     """Dict where d['foo'] also can be accessed as d.foo"""
>     def __init__(self, *args, **kwargs):
>         self.__dict__ = self
>         dict.__init__(self, *args, **kwargs)
>     def __repr__(self):
>         return dict.__repr__(self).join(("attrdict(", ")"))
> 

Strangely enough, this seems okay since an instance of a dict subclass 
object has an empty __dict__ attribute anyway and so you won't be 
unwittingly destroying some behavior.

James


From rdm at rcblue.com  Tue Mar 27 07:28:07 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 27 Mar 2007 04:28:07 -0700
Subject: SPE question
In-Reply-To: <1174991839.417993.295570@y80g2000hsf.googlegroups.com>
References: <1174984775.810988.145060@p77g2000hsh.googlegroups.com>
	<1174991839.417993.295570@y80g2000hsf.googlegroups.com>
Message-ID: <20070327112821.433CF1E4006@bag.python.org>

At 03:37 AM 3/27/2007, irstas at gmail.com wrote:
>On Mar 27, 11:39 am, "alain" <alainpo... at yahoo.fr> wrote:
> > Hi,
> >
> > Could someone tell me how to uninstall SPE under windows?
> >
> > Alain
>
>Dunno about SPE, but most Python modules I've installed can
>be uninstalled from control panel/add remove programs.

SPE doesn't show up on my win XP add/remove programs list.

Dick Moores




From ptmcg at austin.rr.com  Thu Mar 15 08:48:24 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 15 Mar 2007 05:48:24 -0700
Subject: Circular Class Logic
In-Reply-To: <1173960067.782597.96840@e1g2000hsg.googlegroups.com>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
Message-ID: <1173962904.306751.86160@n76g2000hsh.googlegroups.com>

On Mar 15, 7:01 am, half.ital... at gmail.com wrote:
> > Remove the line above
> > and add this below:
> > def initFoo():
> >   import baz
> >   Foo.baz = baz.Baz()
> > initFoo()
>
> I got it to work, but I had to add a check to see if the class
> variable had been set..
>
> def initBaz():
>   import Baz
>   Foo.baz = Baz.Baz()
>
> class Foo:
>   baz = None
>   def __init__(self):
>     if Foo.baz == None:
>       Foo.baz = True
>       initBaz()
>
> What exactly is being accomplished by having the init function outside
> of the class?  If there is no check, wouldn't it just execute every
> time an object is instantiated anyway?
>
> > Instead of initFoo, you could use a custom metaclass. Or a class decorator (if
> > and when they become available...)
>
> I haven't tried either of those yet.  The names scare me. :)  Sounds
> like this might be a good time to explore them.
>
> > The code above is an effective way of doing what you want. But I'd think about
> > the actual need of doing such things - are you sure it's a good design?
>
> I thought it was a good design, but now I'm not so sure.  I'm
> untrained, so often I dont know the right way to do things.  As I
> build this into the libraries, I'll keep an eye on how the code is
> developing and go from there.    Thanks for the help!
>
> ~Sean

Just initialize Folder at module level - see below.
-- Paul

class Folder(object):
    def __init__(self,path):
        self.path = path
        pass

    def __repr__(self):
        return self.__class__.__name__+"("+self.path+")"

class Disk(Folder):
    def __init__(self,driveLetter):
        super(Disk,self).__init__(driveLetter+":/")

# hokey function to test if a drive letter points to a drive, I'm
# sure there's a better way
import os,string
def isDisk(d):
    try:
        os.stat(d + ":/")
        return True
    except:
        return False

# instead of calling some initFolder() method, just include this
statement
# at module level in the module that declares both classes
Folder.allDisks = map(Disk,[d for d in string.uppercase if isDisk(d)])

# now can reference allDisks through Folder instances
f = Folder("C:/temp")
print f.allDisks


prints:
[Disk(C:/), Disk(D:/), Disk(E:/)]




From gagsl-py2 at yahoo.com.ar  Sat Mar 24 18:07:29 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 Mar 2007 19:07:29 -0300
Subject: Python object overhead?
References: <mailman.5530.1174684299.32031.python-list@python.org>
	<56ja46F28lpp9U1@mid.individual.net>
	<c2701f5c0703241407o26469543gb7122903319de4aa@mail.gmail.com>
Message-ID: <op.tpprqrkcx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 24 Mar 2007 18:07:57 -0300, Felipe Almeida Lessa  
<felipe.lessa at gmail.com> escribi?:

> On 3/23/07, Bjoern Schliessmann
> <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
>> (Note that almost everything in Python is an object!)
>
> Could you tell me what in Python isn't an object? Are you counting
> old-style classes and instances as "not object"s?

The syntax, by example; an "if" statement is not an object.

-- 
Gabriel Genellina



From mail at timgolden.me.uk  Wed Mar 28 08:57:31 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Wed, 28 Mar 2007 13:57:31 +0100
Subject: how to check whether a drive is a network drive or drive from
	attached hard-disk
In-Reply-To: <1175086146.462161.320980@p15g2000hsd.googlegroups.com>
References: <1175086146.462161.320980@p15g2000hsd.googlegroups.com>
Message-ID: <460A663B.4070504@timgolden.me.uk>

shailesh wrote:
> Hi,
> 
> Few very simple questions.
> 
> Is there a way to detect whether a drive is a mapped network drive or
> not in Windows?
> 
> Also, how can I get a list of drive letters currently in use in the
> system?

http://tgolden.sc.sabren.com/python/wmi_cookbook.html#find-drive-types

TJG


From yossi.kreinin at gmail.com  Sat Mar 31 10:48:13 2007
From: yossi.kreinin at gmail.com (yossi.kreinin at gmail.com)
Date: 31 Mar 2007 07:48:13 -0700
Subject: saving Python process state for later debugging
Message-ID: <1175352493.387046.32510@q75g2000hsh.googlegroups.com>

Hi!

Is there a way to save the state of a Python process for later
inspection with a debugger? One way to do this is to dump core, but is
the result usable for debugging with pdb (it can be debugged by gdb,
which can inspect PyObjects in a CPython core, for example, but it's
not much fun)?

If there is no way to do this today, are there essential difficulties
in implementing this on top of an OS support for "raw" core dumps?

TIA,
Yossi



From http  Tue Mar 13 21:35:51 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 17:35:51 -0800
Subject: number generator
References: <mailman.5048.1173833625.32031.python-list@python.org>
	<pan.2007.03.14.01.14.48.92442@REMOVEME.cybersource.com.au>
Message-ID: <7xveh4haiw.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> Me too. Although Alex Martelli's algorithm:
> 
> map([random.randrange(5) for i in xrange(45)].count, xrange(5))
> 
> (each value needs adjusting up by one) really boggles my brain. I'm going
> to have to think about that.

Heh, that is woefully inefficient, but it is cute!  I must have missed
Alex's post where it appeared.

Basically you are taking five buckets and 45 marbles.  For each
marble, choose one of the buckets at random and throw the marble into
the bucket you chose.  When you're done, count how many marbles have
ended up in each bucket.  Alex's algorithm does it the hard way: for
each bucket selection, write down the result in a list.  Then scan
through the list to count how many 0's there are, then scan again to
see how many 1's there are, etc.


From sjmachin at lexicon.net  Thu Mar 15 05:42:46 2007
From: sjmachin at lexicon.net (John Machin)
Date: 15 Mar 2007 02:42:46 -0700
Subject: most complete xml package for Python?
In-Reply-To: <1173909884.822838.264030@n76g2000hsh.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
	<1173908076.351577.75000@n59g2000hsh.googlegroups.com>
	<1173909884.822838.264030@n76g2000hsh.googlegroups.com>
Message-ID: <1173951766.692371.206790@l75g2000hse.googlegroups.com>

On Mar 15, 9:04 am, "metaperl" <metap... at gmail.com> wrote:
> On Mar 14, 5:34 pm, "John Machin" <sjmac... at lexicon.net> wrote:
>
> > Given keywords like "Amara" and "Elementtree" and past history, it
> > looked to me like a troll of one kind trying to incite a troll of
> > another kind to pop out from under the bridge and chew on his
> > ankle :-)
>
> Well, I'm not a troll. And I am now even less impressed with
> ElementTree. It does not preserve the document but reforms it in
> certain cases.
>
> <script></script>
>
> gets rewritten as
>
> <script />
>
> which leads to problems when embedding Dojo Rich Text Editors.

As BlackJack has pointed out, that's syntactically equivalent. If that
bothers you, best you don't check out what it does with namespace
prefixes.



From dave at boost-consulting.com  Tue Mar 20 20:02:20 2007
From: dave at boost-consulting.com (David Abrahams)
Date: Tue, 20 Mar 2007 20:02:20 -0400
Subject: PyImport_ImportModule/embedding: surprising behaviors
Message-ID: <87aby7ihv7.fsf@valverde.peloton>


I'm seeing highly surprising (and different!) behaviors of
PyImport_ImportModule on Linux and Windows when used in a program with
python embedding.

On Linux, when attempting to import a module xxx that's in the current
directory, I get

  ImportError: No module named xxx

I can work around the problem by setting 

  PYTHONPATH=.

On Windows, I get:

  'import site' failed; use -v for traceback

I can work around the problem by setting PYTHONPATH to point to the
python library directory:

  set PYTHONPATH=c:\Python25\Lib

I was under the impression that both the current directory *and* the
python library directory were already, automatically, in sys.path, so
I'm really surprised to see this.  Am I doing something wrong, or is
this simply the expected behavior (and if so, where is it documented)?

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com



From aleax at mac.com  Sun Mar 11 22:34:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 19:34:44 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<7xps7f5ptp.fsf@ruckus.brouhaha.com>
	<1hutrb3.e1sbu5kvxk8nN%aleax@mac.com> <87odmznrbf.fsf@gmail.com>
Message-ID: <1hutsxr.3pcc7j1w12q1oN%aleax@mac.com>

Jorge Godoy <jgodoy at gmail.com> wrote:

> aleax at mac.com (Alex Martelli) writes:
> 
> > Incidentally (and I know you know that, Paul, but others interested in
> > this thread might not) fast exact rational arithmetic (based on the LGPL
> > library named GMP) is supplied, among other functionality, by module
> > gmpy, currently found at http://code.google.com/p/gmpy/ (this version is
> > more recent than the older one at sourceforce, which for some reason
> > doesn't let me update things right any more).
> 
> For some reason setuptools isn't finding it:
> 
> jupiter:~ # easy_install gmpy
> Searching for gmpy
> Reading http://cheeseshop.python.org/pypi/gmpy/
> Reading http://code.google.com/p/gmpy/
> Reading http://cheeseshop.python.org/pypi/gmpy/1.02
> No local packages or download links found for gmpy
> error: Could not find suitable distribution for Requirement.parse('gmpy')
> 
> 
> I believe that setuptools isn't ready to find packages on code.google.com
> yet... ;-)

I'm not familiar with setuptools, what exactly is it looking for?

If it's looking for stuff to download it should start at

http://code.google.com/p/gmpy/downloads/list

(but what does it want -- the sources' zipfile, or some binary, and in
what format and with what naming convention?) -- I'll be glad to edit
the URL for gmpy at cheeseshop if some setuptools expert can explain
these subtleties... thanks for pointing out that there's a problem
btw!-)


Alex


From tom.rectenwald at eglow.net  Wed Mar 14 08:37:50 2007
From: tom.rectenwald at eglow.net (tereglow)
Date: 14 Mar 2007 05:37:50 -0700
Subject: Grep Equivalent for Python
Message-ID: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>

Hello all,

I come from a shell/perl background and have just to learn python.  To
start with, I'm trying to obtain system information from a Linux
server using the /proc FS.  For example, in order to obtain the amount
of physical memory on the server, I would do the following in shell:

grep ^MemTotal /proc/meminfo | awk '{print $2}'

That would get me the exact number that I need.  Now, I'm trying to do
this in python.  Here is where I have gotten so far:

memFile = open('/proc/meminfo')
for line in memFile.readlines():
    print re.search('MemTotal', line)
memFile.close()

I guess what I'm trying to logically do is... read through the file
line by line, grab the pattern I want and assign that to a variable.
The above doesn't really work, it comes back with something like
"<_sre.SRE_Match object at 0xb7f9d6b0>" when a match is found.

Any help with this would be greatly appreciated.
Tom



From gert.cuykens at gmail.com  Sat Mar  3 03:27:13 2007
From: gert.cuykens at gmail.com (gert)
Date: 3 Mar 2007 00:27:13 -0800
Subject: html sql client
In-Reply-To: <1172820787.946209.88810@n33g2000cwc.googlegroups.com>
References: <1172813239.754095.231900@p10g2000cwp.googlegroups.com>
	<pan.2007.03.02.06.33.54.662626@gmx.net>
	<1172820787.946209.88810@n33g2000cwc.googlegroups.com>
Message-ID: <1172910433.162735.46960@h3g2000cwc.googlegroups.com>

On Mar 2, 8:33 am, "gert" <gert.cuyk... at gmail.com> wrote:
> On Mar 2, 7:33 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>
> > In <1172813239.754095.231... at p10g2000cwp.googlegroups.com>, gert wrote:
> > > I was thinking about making a column module that names the columns, i
> > > was hoping there would be some sort of api feature that already exist
> > > because parsing sql statemants to figure out which column is refers to
> > > what is allot of work.
>
> > Are you searching for the `description` attribute of cursors?  Section
> > `Cursor Objects`:
>
> >    http://www.python.org/dev/peps/pep-0249/
>
> i think so :) if cursor.description would give me for example the word
> databases when i do a query like "show databases" or gives me all the
> column names when i do "select * from mytable"

http://sourceforge.net/projects/dfo/

Alrigdy i have columns with names now thx :)



From sjmachin at lexicon.net  Mon Mar 12 00:49:50 2007
From: sjmachin at lexicon.net (John Machin)
Date: 11 Mar 2007 21:49:50 -0700
Subject: How to test if a key in a dictionary exists?
In-Reply-To: <1hutxsj.12uwks7mkbcqmN%aleax@mac.com>
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
	<1173578899.046177.104890@j27g2000cwj.googlegroups.com>
	<7x6498le9v.fsf@ruckus.brouhaha.com>
	<1173602405.956438.140590@c51g2000cwc.googlegroups.com>
	<1hutxsj.12uwks7mkbcqmN%aleax@mac.com>
Message-ID: <1173674990.270916.255920@t69g2000cwt.googlegroups.com>

On Mar 12, 3:19 pm, a... at mac.com (Alex Martelli) wrote:
> Paul McGuire <p... at austin.rr.com> wrote:
> > will be.  For instance, when working with data from 0 to 100 and
> > looking for frequencies by decade, you can initialize the histogram-
> > dict with:
>
> > for i in range(10):
> >     histodict[i] = 0
>
> A better way, of course (also saving the histodict = {} which you didn't
> mention but surely intended) would be:
>
>     histodict = dict.fromkeys(range(10), 0)
>
> In Python, in general, the more conceptually compact, direct, simple and
> higher-abstraction approach tends to be faster as well, BTW.

That's so true, especially if it's matched to the problem space, isn't
too new, and doesn't need looking up in the docs :-)

Python 2.1.3 (#35, Apr  8 2002, 17:47:50) [MSC 32 bit (Intel)] on
win32
Type "copyright", "credits" or "license" for more information.
>>> histodict = dict.fromkeys(range(10), 0)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: name 'dict' is not defined
>>> histolist = [0] * 10
>>> histolist[3] += 1
>>> histolist
[0, 0, 0, 1, 0, 0, 0, 0, 0, 0]
>>>

Cheers,
John



From bressert at gmail.com  Fri Mar  9 01:04:48 2007
From: bressert at gmail.com (bressert at gmail.com)
Date: 8 Mar 2007 22:04:48 -0800
Subject: C++ and Python
Message-ID: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>

Hi Everyone,

I'm considering about generating some Python Bindings for C++
libraries. What are considered the best tools for doing something like
this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.

Thanks!



From istvan.albert at gmail.com  Mon Mar 26 10:02:18 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 26 Mar 2007 07:02:18 -0700
Subject: web development with python -  comparison
Message-ID: <1174917738.204650.200790@n59g2000hsh.googlegroups.com>


Here is a comprehensive review of python web apps:

http://jesusphreak.infogami.com/blog/vrp1

Since this comes up every so often in this group.

i.



From sgeiger at ncee.net  Sat Mar 24 15:47:42 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Sat, 24 Mar 2007 14:47:42 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174758378.274917.170690@p15g2000hsd.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<1174758378.274917.170690@p15g2000hsd.googlegroups.com>
Message-ID: <4605805E.9090600@ncee.net>

You don't have to uninstall 2.4.4 to use 2.5.  Just change where the 
symlink points:

shanegeiger at shane-geigers-computer:~\ 14:45:35$ ls -la /usr/bin/python
lrwxr-xr-x   1 root  wheel  24 Mar  1 12:48 /usr/bin/python -> 
/usr/local/bin/python2.5
shanegeiger at shane-geigers-computer:~\ 14:45:40$

In general, I am a little wary of uninstalling programs like Python 
which are used by many applications.  You don't want to find out after 
you have uninstalled it that something actually needed it.  It is much 
safer to keep it around.


kyosohma at gmail.com wrote:
> On Mar 24, 11:30 am, "Robert Hicks" <sigz... at gmail.com> wrote:
>   
>> I want to upgrade to 2.5 but I don't see any unistall instructions
>> anywhere.
>>
>> Robert
>>     
>
> Windows allows us to uninstall it. I think the only thing it really
> installs is the files, and then it sets the system path, so just
> delete the files and change your path. Unfortunately, I do not have a
> Mac to test with.
>
> Mike
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From eric_brunel at despammed.com  Fri Mar  2 11:27:30 2007
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 02 Mar 2007 17:27:30 +0100
Subject: Tkinter menus
References: <es76c6$5bo$1@ss408.t-com.hr> <es7gvd$m3$1@zinnia.noc.ucla.edu>
	<op.tojzoomirqur0o@eb.pragmadev> <es961f$82g$1@ss408.t-com.hr>
Message-ID: <op.toklb5ehrqur0o@eb.pragmadev>

On Fri, 02 Mar 2007 13:41:12 +0100, Gigs_ <gigs at hi.t-com.hr> wrote:
> is it alright to use Menu instead Toplevel or Tk
> like this?
>
> from Tkinter import *
> from tkMessageBox import *
>
> class MenuDemo(Menu):
>      def __init__(self, master=None):
>          Menu.__init__(self, master)
>          self.createWidgets()
>          self.master.title('Toolbars and Mennus')
>          self.master.iconname('tkpython')
>
>      def createWidgets(self):
>          self.makeMenuBar()
>          self.makeToolBar()
>          L = Label(self.master, text='Menu and Toolbar demo')
>          L.config(relief=SUNKEN, width=40, height=10, bg='white')
>          L.pack(expand=YES, fill=BOTH)

Feels weird to me. Creating widgets in a window from what is supposed to  
its its menu is quite unexpected. I would definitely create a sub-class of  
Toplevel or Tk and create the menu in it.

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From marco at waven.com  Mon Mar  5 04:12:04 2007
From: marco at waven.com (Marco)
Date: Mon, 5 Mar 2007 17:12:04 +0800
Subject: How to create pid.lock via python?
Message-ID: <5c62a320703050112s6afc5af8w415bd3cb22877809@mail.gmail.com>

Hello,

I write a program control a device via RS232, I hope to add some code
to let the program canNOT be used by other people when one people
using.

Can you tell me how to create pid.lock file in python?
Thank you!!


-- 
LinuX Power


From ptmcg at austin.rr.com  Fri Mar 16 10:02:10 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 16 Mar 2007 07:02:10 -0700
Subject: Eureka moments in Python
In-Reply-To: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <1174053730.543334.138910@n59g2000hsh.googlegroups.com>

On Mar 13, 2:16 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> I'd be interested in hearing people's stories of Eureka moments in Python,
> moments where you suddenly realise that some task which seemed like it
> would be hard work was easy with Python.
>

The day I wrote a CORBA method intercepter in 8 lines of code using
__getattr__ to catch 2 or 3 interesting method calls out of 20 or 30
defined in the IDL.  The interesting methods I handled, and the rest I
just forwarded to the remote CORBA object.  Unfortunately, the client
expected this to be an expensive job, and I was only able to bill him
for 1/2 an hour (I had to test the code in addition to writing it).

-- Paul



From jstroud at mbi.ucla.edu  Thu Mar  1 05:09:50 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 01 Mar 2007 10:09:50 GMT
Subject: splitting perl-style find/replace regexp using python
In-Reply-To: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
References: <1172741100.414936.269460@q2g2000cwa.googlegroups.com>
Message-ID: <ODxFh.3179$BE2.2738@newssvr27.news.prodigy.net>

John Pye wrote:
> Hi all
> 
> I have a file with a bunch of perl regular expressions like so:
> 
> /(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/ #
> bold
> /(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/
> b>''$3/ # italic bold
> /(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/ #
> italic
> 
> These are all find/replace expressions delimited as '/search/replace/
> # comment' where 'search' is the regular expression we're searching
> for and 'replace' is the replacement expression.
> 
> Is there an easy and general way that I can split these perl-style
> find-and-replace expressions into something I can use with Python, eg
> re.sub('search','replace',str) ?
> 
> I though generally it would be good enough to split on '/' but as you
> see the <\/b> messes that up. I really don't want to learn perl
> here :-)
> 
> Cheers
> JP
> 

This could be more general, in principal a perl regex could end with a 
"\", e.g. "\\/", but I'm guessing that won't happen here.

py> for p in perlish:
...   print p
...
/(^|[\s\(])\*([^ ].*?[^ ])\*([\s\)\.\,\:\;\!\?]|$)/$1'''$2'''$3/
/(^|[\s\(])\_\_([^ ].*?[^ ])\_\_([\s\)\.\,\:\;\!\?]|$)/$1''<b>$2<\/b>''$3/
/(^|[\s\(])\_([^ ].*?[^ ])\_([\s\)\.\,\:\;\!\?]|$)/$1''$2''$3/
py> import re
py> splitter = re.compile(r'[^\\]/')
py> for p in perlish:
...   print splitter.split(p)
...
['/(^|[\\s\\(])\\*([^ ].*?[^ ])\\*([\\s\\)\\.\\,\\:\\;\\!\\?]|$', 
"$1'''$2'''$", '']
['/(^|[\\s\\(])\\_\\_([^ ].*?[^ ])\\_\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$', 
"$1''<b>$2<\\/b>''$", '']
['/(^|[\\s\\(])\\_([^ ].*?[^ ])\\_([\\s\\)\\.\\,\\:\\;\\!\\?]|$', 
"$1''$2''$", '']

(I'm hoping this doesn't wrap!)

James


From qilong_ren at yahoo.com  Fri Mar 16 17:09:23 2007
From: qilong_ren at yahoo.com (Qilong Ren)
Date: Fri, 16 Mar 2007 14:09:23 -0700 (PDT)
Subject: How to get the previous line in a file?
Message-ID: <155468.56172.qm@web58905.mail.re1.yahoo.com>

Hi, Shane,

Thanks for fast reply.

What I used is :
       for line in open(FILE):
           <do stuff>
I don't want to store all lines in a list because sometimes the file is very large. We need to store the value of the previous line in a variable. Is that right? 

Thanks,Qilong

----- Original Message ----
From: Shane Geiger <sgeiger at ncee.net>
To: Qilong Ren <qilong_ren at yahoo.com>
Sent: Friday, March 16, 2007 1:51:09 PM
Subject: Re: How to get the previous line in a file?

lines = open('/tmp/foo.py', 
"r").read().splitlines()                                                                                                    

previous_line = 
''                                                                                                                                      

for line in 
lines:                                                                                                                                      

    if "foo" in 
line:                                                                                                                                   

        print "found foo in the current line.  The previous line is:  " 
+ 
previous_line                                                                 

                                                                                                                                                        



Qilong Ren wrote:
> Hi,all
>
> I am new to this list. And I am glade I am here.
> I have a question. I need to do some text processing. I need to read 
> from a file line by line. If some line is met with some condition, the 
> previous line needs some modification. How to get the info of the 
> previous line?
>
> Thanks!
> Qilong
>
> ------------------------------------------------------------------------
> Never miss an email again!
> Yahoo! Toolbar 
> <http://us.rd.yahoo.com/evt=49938/*http://tools.search.yahoo.com/toolbar/features/mail/> 
> alerts you the instant new Mail arrives. Check it out. 
> <http://us.rd.yahoo.com/evt=49937/*http://tools.search.yahoo.com/toolbar/features/mail/>

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy


begin:vcard
fn:Shane Geiger
n:Geiger;Shane
org:National Council on Economic Education (NCEE)
adr:Suite 215;;201 N. 8th Street;Lincoln;NE;68508;United States
email;internet:sgeiger at ncee.net
title:IT Director
tel;work:402-438-8958
x-mozilla-html:FALSE
url:http://www.ncee.net
version:2.1
end:vcard








 
____________________________________________________________________________________
Bored stiff? Loosen up... 
Download and play hundreds of games for free on Yahoo! Games.
http://games.yahoo.com/games/front
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From gigs at hi.t-com.hr  Fri Mar 16 14:22:20 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 16 Mar 2007 19:22:20 +0100
Subject: Tkinter menu toplevel or frame
Message-ID: <etc2tj$1d3$1@ss408.t-com.hr>

what is the best way to write tkinter menus? As toplevels or as frame 
with Menubutton?

im doing like this
class MyWidget(Frame):
     def __init__(self, master=None):    """ should this master be 
parent? Because my first tought was that this is toplevel master than i 
found that its not"""
         Frame.__init__(self, master)    # and this too than
         self.config(width=200, height=200)
         self.pack(fill=BOTH, expand=YES)
         self.makeMenuBar()

     def makeMenuBar(self):
         self.menubar = Menu(self.master)
         self.master.config(menu=self.menubar)
         pulldown = Menu(self.menubar, tearoff=0)
         pulldown.add_command(label='New', command=self.new)
         pulldown.add_command(label='Open', command=self.onOpen)
         pulldown.add_command(label='Save', command=self.save)
         pulldown.add_command(label='Save As', command=self.saveas)
         pulldown.add_separator()
         pulldown.add_command(label='Exit', command=self.onExit)
         self.menubar.add_cascade(label='File', underline=0, menu=pulldown)


Please tell me is here anything that I should change.


From jacob.rael at gmail.com  Wed Mar 14 17:05:35 2007
From: jacob.rael at gmail.com (Jacob Rael)
Date: 14 Mar 2007 14:05:35 -0700
Subject: Add readline capability to existing interactive program
Message-ID: <1173906335.314773.73790@y80g2000hsf.googlegroups.com>

Hello,

I use an interactive simulator/data plotter called ocean. I get really
frustrated using it because it does not have basic readline
capabilities like ctrl-a for beginning of line and ctrl-k to kill the
rest of the line.

I was thinking this might be easy to add with Python. Do something
like start python and then kick off the ocean job and then use
something like pexpect to interact with it. I think this would work
but there may be an even easier way to do it, maybe directly with
popen2.

A quick google search lead me to:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/108287

and shows code:

import os
f=os.popen('gnuplot', 'w')
print >>f, "set yrange[-300:+300]"
for n in range(300):
	print >>f, "plot %i*cos(x)+%i*log(x+10)" % (n,150-n)
f.flush()


this kind of works but not quite. Windows don't pop open and results
of calculations (3+3) don't echo back.

Before I started coding, I thought I would ask if a module or examples
already exits that do what I want.

jr



From wojciech_mula at poczta.null.onet.pl.invalid  Thu Mar 22 07:26:38 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (=?ISO-8859-2?Q?Wojciech_Mu=B3a?=)
Date: Thu, 22 Mar 2007 12:26:38 +0100
Subject: interpreting glyph outlines from ttfquery?
In-Reply-To: <1174545685.277420.26890@e1g2000hsg.googlegroups.com>
References: <1174545685.277420.26890@e1g2000hsg.googlegroups.com>
Message-ID: <ettp6r$c1l$1@atlantis.news.tpi.pl>

swiftset wrote:
> I'm try to convert a glyph into a format I can easily numerically
> manipulate. So far I've figured out how to use ttfquery to get a list
> that represents the outline of a contour in a glyph:
> 
> from ttfquery import describe, glyphquery, glyph
> f = describe.openFont("/usr/share/fonts/truetype/freefont/
> FreeSans.ttf")
> n = glyphquery.glyphName(f, 'D')
> g = glyph.Glyph(n)
> c = g.calculateContours(f)
> o = glyph.decomposeOutline(c[1])
> 
> o looks like:
> 
> [array([182,  82],'s'),
> (354, 82),
> (420.22222222222229, 90.000000000000014),
> (474.88888888888891, 114.0), ...,
> array([182,  82],'s'),
> array([182,  82],'s')]
> 
> Is this a polyline?

decomposeOutline docstring confirms -- it's a polyline.  I think 
elements marked with 's' starts new subpath.

w.


From gagsl-py2 at yahoo.com.ar  Tue Mar  6 23:54:40 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 01:54:40 -0300
Subject: image processing
References: <1173171010.239215.130580@n33g2000cwc.googlegroups.com>
	<7xirdekauw.fsf@ruckus.brouhaha.com>
	<1173186981.056242.152120@64g2000cwx.googlegroups.com>
Message-ID: <op.tosyleedx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 06 Mar 2007 10:16:21 -0300, edurand <edurand.com at gmail.com>  
escribi?:

> On Mar 6, 9:57 am, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>> "edurand" <edurand.... at gmail.com> writes:

>> > Have a look at :http://filters.sourceforge.net/

> It's a DLL, so yes, it run on Windows.
> If someone would like to port it on other OS, why not.

Could you please update the project attributes then? Operating System,  
Language... They appear not to have the right values.

-- 
Gabriel Genellina



From anton.vredegoor at gmail.com  Wed Mar 14 06:08:42 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Wed, 14 Mar 2007 11:08:42 +0100
Subject: number generator
In-Reply-To: <1173861843.878008.83090@p15g2000hsd.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<1173861843.878008.83090@p15g2000hsd.googlegroups.com>
Message-ID: <et8mjc$7ka$1@news4.zwoll1.ov.home.nl>

Raymond Hettinger wrote:

> Since people are posting their solutions now (originally only hints
> were provided for the homework problem), here's mine:

Homework problem? Do you have some information from the OP that I can't 
find in this thread? Anyway, I consider the 'homework' idea and the 
associated self concept that turns people into -for example- 
backstabbing computer scientists who never release their code as the 
root of all evil in the educational system. Why should I uphold a moral 
code that I don't agree with? To me people posting homework problems are 
like refugees which I will help if I can.

> def genpool(n, m):
>     if n == 1:
>         yield [m]
>     else:
>         for i in xrange(1, m):
>             for rest in genpool(n-1, m-i):
>                 yield rest + [i]
> 
> import random
> print random.choice(list(genpool(n=4, m=20)))

OK back to the *computer* code. Great function! And it's ideally suited 
for memoization too. Too bad this memoizor doesn't accept keyword 
arguments, but for the rest it works fine and greatly speeds it up.

import random

def memoize(fn):
      cache = {}
      def proxy(*args):
          try: return cache[args]
          except KeyError: return cache.setdefault(args, fn(*args))
      return proxy

@memoize
def genpool(n, m):
     if n == 1:
         yield [m]
     else:
         for i in xrange(1, m):
             for rest in genpool(n-1, m-i):
                 yield rest + [i]

def test():
     print random.choice(list(genpool(5,50)))

if __name__=='__main__':
     test()

A.


From gagsl-py2 at yahoo.com.ar  Thu Mar 29 14:43:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 29 Mar 2007 15:43:46 -0300
Subject: Question about details of __import__
References: <20070329104233.2129d267@opal.pathscale.com>
Message-ID: <op.tpyrm8p5x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 29 Mar 2007 14:42:33 -0300, Mitko Haralanov <mitko at qlogic.com>  
escribi?:

> I have three modules that a comprising the problem:
> ./core.py
> ./log.py
> ./resources/simple/__init__.py

Surely there is a ./resources/__init__.py too?

> The problem that I am seeing is that 'global_info' in the log.py module
> is [None, None, None] on both calls of log.Logger (), even though the
> initial call (from core.py) sets it to the passed in values.
> According to the Python documentation, I am using the __import__
> statement correctly to get what I want? It seems like, the guts of the
> import/__import__ code are creating two different namespaces for the
> log.py module.

You may check if this is the case, looking at sys.modules

>  (if you are wondering why I am using __import__ in my class
> constructor, it is because the name of the module that should be
> imported is read out of a configuration file).

Anyway you could import the package and lookup the module inside using  
getattr:

import resources
name = "simple"
module = getattr(resources, name)
self.rs = module.Resource()

-- 
Gabriel Genellina



From carsten at uniqsys.com  Wed Mar 21 10:23:13 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 21 Mar 2007 10:23:13 -0400
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
Message-ID: <1174486993.3198.27.camel@localhost.localdomain>

On Wed, 2007-03-21 at 06:36 -0700, flit wrote:
> Hello All,
> 
> I have a hard question, every time I look for this answer its get out
> from the technical domain and goes on in the moral/social domain.
> First, I live in third world with bad gov., bad education, bad police
> and a lot of taxes and bills to pay, and yes I live in a democratic
> "state" (corrupt, but democratic).
> So please, don't try to convince me about the social / economical /
> open source / give to all / be open / all people are honest until
> prove contrary / dance with the rabbits...
> Remember I need to pay bills and security.

Developing open-source code and getting paid are not necessarily
mutually exclusive, but I digress...

> Now the technical question:
> 
> 1 - There is a way to make some program in python and protects it? I
> am not talking about ultra hard-core protection, just a simple one
> that will stop 90% script kiddies.

Not providing .py files and instead only providing .pyc files is
perfectly viable, really easy to do, and provides adequate protection
against casual/accidental code inspection.

A sufficiently determined person will be able to retrieve the source
code, but that is also true for any other imaginable protection scheme.
In order for the user's computer to execute your code, you have to give
the user's computer your code. Once that happens it's only a question of
how determined you are to obfuscate the code and how determined they are
to break your obfuscation.

> 2 - If I put the code in web like a web service, how can I protect my
> code from being ripped? There is a way to avoid someone using my site
> and ripping the .py files?

Providing the code as a service instead means that you don't have to
give the user your code, since the code runs on your hardware. As long
as the server is properly configured, it will never serve the source
code. You would still have to worry about malicious users trying to gain
unauthorized root access to your server, and then they can do whatever
they want, including looking at your super secret and super valuable
code.

It all comes back down to the question of how determined you are to
protect your code and how determined your users are to break into it. 

-Carsten




From bdesth.quelquechose at free.quelquepart.fr  Mon Mar 19 16:00:07 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 21:00:07 +0100
Subject: any ways to judge whether an object is initilized or not in a
	class
In-Reply-To: <mailman.5288.1174324988.32031.python-list@python.org>
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>	<566vcfF27jlu4U1@mid.uni-berlin.de>	<45fe89d4$0$24787$426a34cc@news.free.fr>
	<mailman.5288.1174324988.32031.python-list@python.org>
Message-ID: <45fee35d$0$29889$426a74cc@news.free.fr>

Steve Holden a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Diez B. Roggisch a ?crit :
>>
(snip)
>>> You want boil to be called __init__, which is python's constructor name. 
>>
>> <nitpicking>
>> Actually, __init__ is the initializer. The proper constructor is __new__.
>> </nitpicking>
>>
> <nitpicking severity="be-kind-to-novices">

I'm not sure Diez qualifies as a "novice". And since the OP makes 
reference to C++, I assume he's able to grasp the difference between a 
constructor and an initializer.

> Actually you would have to ensure that the class's metaclass was <type 
> "type"> for that to be true. Classic classes don't *have* a __new__ method.

Yes, true.

Fact is I stopped using old-style classes some years ago, so I don't 
really remember what features they were missing. Thanks for the correction.



From steve at holdenweb.com  Tue Mar 20 06:22:37 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 20 Mar 2007 06:22:37 -0400
Subject: When is List Comprehension inappropriate?
In-Reply-To: <1hv8wz8.19mj0kb1k9m2m8N%aleax@mac.com>
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>	<mailman.5284.1174321784.32031.python-list@python.org>
	<1hv8wz8.19mj0kb1k9m2m8N%aleax@mac.com>
Message-ID: <etocnv$ccj$1@sea.gmane.org>

Alex Martelli wrote:
> BJ?rn Lindqvist <bjourne at gmail.com> wrote:
>    ...
>> even2 = [(pos, col) for pos, col in iterimage(im, width, height, 2)]
> 
> list(iterimage(etc etc))
> 
> is surely a better way to express identical semantics.  More generally,
> [x for x in whatever] (whether x is a single name or gets peculiarly
> unpacked and repacked like here) is a good example of inappropriate LC,
> to get back to the question in the subject: list(whatever) is the "one
> obvious way" to perform the same task.
> 
Clearly the comprehension you complain about is sub-optimal.

The essential difference, however, is between

   [x for x in iterimage(im, width, height, 2)]

and

   list(iterimage(im, width, height, 2))

I agree that the latter is the obvious way, but the difference isn't as 
large as your leap makes it look - and we had to await the invention of 
the generator expression for it to be a practical choice.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From mrmakent at cox.net  Thu Mar 15 11:21:21 2007
From: mrmakent at cox.net (Mike Kent)
Date: 15 Mar 2007 08:21:21 -0700
Subject: Pickle Problem
In-Reply-To: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
Message-ID: <1173972081.633922.133470@y80g2000hsf.googlegroups.com>

On Mar 15, 11:13 am, "tonyr1988" <tonyr1... at gmail.com> wrote:

> if __name__=='__main__':
>         x = DemoClass
>         x.WriteToFile
>

You meant to create a DemoClass instance object, but instead, you
obtained a reference to the class object.  You want 'x = DemoClass()'
instead.
You meant to call the WriteToFile method, but instead, you obtained a
reference to the method object.  You want 'x.WriteToFile()' instead.



From paddy3118 at googlemail.com  Thu Mar 22 01:21:17 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 21 Mar 2007 22:21:17 -0700
Subject: When is List Comprehension inappropriate?
In-Reply-To: <1hvci8l.1g8v6n1qj68nnN%aleax@mac.com>
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<1174461824.150667.295820@y66g2000hsf.googlegroups.com>
	<1hvci8l.1g8v6n1qj68nnN%aleax@mac.com>
Message-ID: <1174540877.197959.244100@y66g2000hsf.googlegroups.com>

On Mar 22, 4:56 am, a... at mac.com (Alex Martelli) wrote:
> Paddy <paddy3... at googlemail.com> wrote:
>
>    ...
>
> > I have found that I have gone too far when I used listcomps for their
> > sideeffects rather than wanting the list produced, for example the
>
> I agree.
>
> > second listcomp below is an expression as statement I don't want the
> > list produced - just the effect on data.
>
> > >>> # some random ranges
> > >>> data = [range(random.randrange(3,7)) for x in range(4)]
> > >>> # but I want each range jumbled
> > >>> [ random.shuffle(d) for d in data]
> > [None, None, None, None]
> > >>> data
> > [[2, 0, 3, 1], [0, 2, 1], [3, 4, 1, 0, 2], [2, 1, 0, 3]]
>
> > (I do know how to re-write it).
>
> for d in data: random.shuffle(d)
>
> Alex

Hah,
"You just couldn't let it lie" ;-)

I just knew someone would bite, and re-write it.
Now to reel, you in. Its fish for dinner today!


- Paddy.



From will at willNOmcguganSPAM.com  Tue Mar 27 15:19:59 2007
From: will at willNOmcguganSPAM.com (Will McGugan)
Date: Tue, 27 Mar 2007 20:19:59 +0100
Subject: 16bit RGB with Image module
In-Reply-To: <didOh.9549$JZ3.5804@newssvr13.news.prodigy.net>
References: <hcdOh.9548$JZ3.7651@newssvr13.news.prodigy.net>
	<didOh.9549$JZ3.5804@newssvr13.news.prodigy.net>
Message-ID: <46096e60$0$27113$db0fefd9@news.zen.co.uk>

Jason B wrote:
> Well I kept screwing around and funny thing, this works:
> 
> import sys, Image
> 
> if len(sys.argv) ==  2:
>   print "\nReading: "+sys.argv[1]
>   image_file = open(sys.argv[1], "rb")
>   pixel_data = image_file.read()
> 
> im = Image.fromstring("RGB", (326, 325), pixel_data, "raw", "BGR;16")
> im.show()
> 
> Although I have no idea *why* it works, other than the fact that I'm now 
> using the correct number of bits per pixel.  :)
> 
> Anyone have thoughts on this?

Well RGB will will use 24 bits per pixel, not 16, so the first error you 
got makes sense. I guess using the raw decoder with "BGR;16" makes it 
use 16 bit. Although, I couldn't find any reference in the docs!

I'm sure Fredrik Lundh could shed some light on this...

Will McGugan
--
blog: http://www.willmcgugan.com


From psdasilvaX at esotericaX.ptX  Mon Mar 19 11:27:12 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Mon, 19 Mar 2007 15:27:12 +0000
Subject: Still the __new__ hell ...
In-Reply-To: <45fe7f46$0$2138$426a74cc@news.free.fr>
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
Message-ID: <1174337519.926611@jubilee.claranet.pt>

Bruno Desthuilliers escreveu:
> Paulo da Silva a ?crit :
...

>> class MyDate(date):
>>     def __new__(cls,year,month=None,day=None):
>>         if type(year) is str:
> 
> And what if it's a unicode string ?
> The correct idiom here is:
>                  if isinstance(year, basestring):
> 


Thanks.
If I do type(year) I get either int or str (may be unicode for unicode
strings) but never anything like basestring. As a relatively inexperient
in python, how could I know that a 'string' is an instance of
basestring? x=u"xxxxxx"; help(x) says this is unicode based on
basestring but help does not "work" for x="xxxxxxxx".
May be the python tutorial should be upgraded to include these new
concepts. Also covering the basics of __init__/__new__ (why have both?)
would be nice.

Paulo


From irstas at gmail.com  Sat Mar 24 10:39:39 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 24 Mar 2007 07:39:39 -0700
Subject: creating "jsp-like" tool with python
In-Reply-To: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>
References: <1174699131.550140.67190@l77g2000hsb.googlegroups.com>
Message-ID: <1174747179.657669.154490@l77g2000hsb.googlegroups.com>


jd wrote:
> I'd like to create a program that takes files with "jsp-like" markup
> and processes the embedded code (which would be python) to produce the
> output file.  There would be two kinds of sections in the markup file:
> python code to be evaluated, and python code that returns a value that
> would be inserted into the output.
>
> This seems like it would be straightforward in python, and maybe
> there's even a library that I could use for this, but as a newbie to
> Python, I don't know the landscape very well.  I am not looking for a
> big framework, just something small and simple that will do just this
> job.  Suggestions or pointers would be greatly appreciated.
>
> Thanks...
>
> -- jeff

Sadly, there's probably as many template languages as there are web
frameworks for Python.
Maybe even more. For example:

http://www.djangoproject.com/documentation/templates/
http://nick.borko.org/pse/index.html
http://www.turbogears.org/about/kid.html

Pick your poison.



From BH at bh.com  Mon Mar 26 11:20:27 2007
From: BH at bh.com (BH)
Date: Mon, 26 Mar 2007 17:20:27 +0200
Subject: wx.grid problem
Message-ID: <4607e4f1$0$5098$ba4acef3@news.orange.fr>

Hi !

I have a small problem with wx.Grid and scrollbars.
Scrollbars definitively dissapears after resizing the frame.

Thx for help

#----------------------------------------------------------------------
import wx,wx.grid
#----------------------------------------------------------------------
class MainWindow(wx.Frame):
      def __init__(self,parent,id,title):
          wx.Frame.__init__(self,parent,wx.ID_ANY,title)
          #--
          self.grid= wx.grid.Grid(id=wx.ID_ANY,parent=self)
          self.grid.CreateGrid(numRows=10,numCols=2)
          self.grid.Fit()
          self.Fit()
          #--
          self.Show(1)
#----------------------------------------------------------------------
app = wx.PySimpleApp()
frame=MainWindow(None,-1,'Grid sizer')
app.MainLoop()
del app


From joncle at googlemail.com  Fri Mar 16 06:57:50 2007
From: joncle at googlemail.com (Jon Clements)
Date: 16 Mar 2007 03:57:50 -0700
Subject: CSV module and "fileobj"
Message-ID: <1174042670.829441.286490@n59g2000hsh.googlegroups.com>

Hi Group,

If I have a CSV reader that's passed to a function, is it possible for
that function to retrieve a reference to the "fileobj" like object
that was passed to the reader's __init__? For instance, if it's using
an actual file object, then depending on the current row, I'd like to
open the file object again, seek to the current position, then create
a csv.reader on that, exhaust it until a certain point, then return.
ie, leaving the passed iterator intact and ready to carry on as
normal.

(And yes, I know passing in the source object is probably easier --
assume a constraint that I can't...)

Cheers,

Jon.



From bj_666 at gmx.net  Sun Mar 18 12:44:23 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 18 Mar 2007 17:44:23 +0100
Subject: list comprehension help
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<mailman.5248.1174235057.32031.python-list@python.org>
Message-ID: <pan.2007.03.18.16.44.22.267421@gmx.net>

In <mailman.5248.1174235057.32031.python-list at python.org>, Daniel Nogradi
wrote:

>> f = open('file.txt','r')
>> for line in f:
>>         db[line.split(' ')[0]] = line.split(' ')[-1]
>>         db.sync()
> 
> What is db here? Looks like a dictionary but that doesn't have a sync method.

Shelves (`shelve` module) have this API.  And syncing forces the changes
to be written to disks, so all caching and buffering of the operating
system is prevented.  So this may slow down the program considerably.

Ciao,
	Marc 'BlackJack' Rintsch


From john.pye at gmail.com  Wed Mar 21 02:07:35 2007
From: john.pye at gmail.com (John Pye)
Date: 20 Mar 2007 23:07:35 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <1174456127.741403.198150@e65g2000hsc.googlegroups.com>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<etqecu$kl5$1@rumours.uwaterloo.ca>
	<1174456127.741403.198150@e65g2000hsc.googlegroups.com>
Message-ID: <1174457255.799107.95610@p15g2000hsd.googlegroups.com>

On Mar 21, 4:48 pm, "John Pye" <john.... at gmail.com> wrote:
>
> I am trying the following... any thoughts?
>
> %typemap(in) FILE * {
>     if (!PyFile_Check($input)) {
>         PyErr_SetString(PyExc_TypeError, "Need a file!");
>         return NULL;
>     }
> %#ifdef __MINGW32__
>         PyFileObject *fo = (PyFileObject *)$input;
>         $1 = fdopen(_fileno(fo->f_fp),PyString_AsString(fo->f_mode));
>         fprintf(stderr,"FDOPEN(%d,\"%s\")\n",fo->f_fp,PyString_AsString(fo->f_mode));
>
> %#else
>     $1 = PyFile_AsFile($input);
> %#endif
>
> }


Ok, so this didn't work. 'fdopen' returned NULL. I guess that nails
the coffin for the fileno() approach?

Cheers
JP





From anton.vredegoor at gmail.com  Thu Mar 22 06:00:00 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Thu, 22 Mar 2007 11:00:00 +0100
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <mailman.5446.1174557039.32031.python-list@python.org>
References: <mailman.5428.1174517933.32031.python-list@python.org>	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
Message-ID: <ettk02$6kc$1@news1.zwoll1.ov.home.nl>

Steve Holden wrote:

>> /rant
>>
> Feel better now?

Yes! But *now* I'm afraid it will have negative consequences for my 
future employability. However if it will lead to adjusting the kind of 
submissions at http://www.python.org/community/jobs/
it was probably worth it.

A.

'thanks for asking'


From liecto at gmail.com  Mon Mar 12 03:58:10 2007
From: liecto at gmail.com (liecto)
Date: 12 Mar 2007 00:58:10 -0700
Subject: can not load mod_python on apache
Message-ID: <1173686290.295990.272190@p10g2000cwp.googlegroups.com>

winxp sp2
modpython 3.3.1
apache 2.2.4
python 2.5

when i start apache ,it failed. and the error is
==============
The Apache service named  reported the following error:
>>> httpd.exe: Syntax error on line 166 of F:/mylg/apache-more/local/apache/Apache2/conf/httpd.conf: Cannot load F:/mylg/apache-more/local/apache/Apache2/modules/mod_python.so into server: \xd5\xd2\xb2\xbb\xb5\xbd\xd6\xb8\xb6\xa8\xb5\xc4\xc4\xa3\xbf\xe9\xa1\x     .
===============

who can help me??



From sjpiii at ya.delete.hoo.com  Tue Mar  6 15:54:10 2007
From: sjpiii at ya.delete.hoo.com (sjpiii)
Date: Tue, 6 Mar 2007 15:54:10 -0500
Subject: Webserver balance load
References: <1173124034.130806.316750@30g2000cwc.googlegroups.com>
Message-ID: <cykHh.17$4v5.4@newsfe04.lga>

"Johny" <python at hope.cz> wrote in message 
news:1173124034.130806.316750 at 30g2000cwc.googlegroups.com...
> Can anyone suggest a way how to balance load on Apache server where I
> have Python scripts running?
> For example I have 3 webservers( Apache servers) and I would like to
> sent user's request to one of the three server depending on a load on
> the server.
> Thank you .
> L.
>
I believe you can do this with mod_proxy and mod_proxy_balancer within
apache itself.  I have not tried it, but the documentation is here:
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html

Jp 




From rocky.bernstein at gmail.com  Thu Mar 29 08:37:31 2007
From: rocky.bernstein at gmail.com (rocky.bernstein at gmail.com)
Date: 29 Mar 2007 05:37:31 -0700
Subject: PDB does not allow jumping to first statement?
In-Reply-To: <1175119521.753287.55740@o5g2000hsb.googlegroups.com>
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
	<1174989571.857680.318720@o5g2000hsb.googlegroups.com>
	<1175025037.464283.260680@e65g2000hsc.googlegroups.com>
	<1175119521.753287.55740@o5g2000hsb.googlegroups.com>
Message-ID: <1175171851.629159.137660@o5g2000hsb.googlegroups.com>

On Mar 28, 6:05 pm, "Chris Lasher" <chris.las... at gmail.com> wrote:
> I have submitted this as a bug via SourceForge:
> <https://sourceforge.net/tracker/?
> func=detail&atid=105470&aid=1689458&group_id=5470>
> or if munged
> <http://tinyurl.com/2nwxsf>
>
> ThePythonfolks would like a test case and/or a patch. This is well
> beyond my ken as a humblePythonuser. Could anybody more
> knowledgeable please contribute one or both? Duncan or Rocky, would
> you be able to spare time and effort?
>
> Chris

First and foremost, thanks for submitting the bug report!

Alas, I don't use Python much anymore in day-to-day activities. Ruby
rules! However some weekend (when I'm not doing work) I'll try to find
time to conjure up an example.

But here's a sketch of how I think a small test case would work. One
would use sys.settrace() to set up the mechanism to get the current
frame after each statement gets run. In the function, say bugcheck(),
which used as the hook given to sys.settrace(), if the caller's
f_lineno is not the first statement, one would set it to the first
statement noting that the reassignment has happened so we don't loop
indefinitely. Then one would return from the function which will let
the program do a step and check what value of f_lineno appears in the
subsequent calls of bugcheck().

Alternatively one could write a .pdbrc which basically issues the
"step" and "jump" commands and prints out the line number. (In pydb or
gdb the command to print the current line would be  "info line"; in
pdb I'm not sure what the best command is - "list"?, "bt?



From half.italian at gmail.com  Thu Mar 15 22:02:29 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 15 Mar 2007 19:02:29 -0700
Subject: Circular Class Logic
In-Reply-To: <1173986733.127500.250250@b75g2000hsg.googlegroups.com>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
	<1173921593.166607.240390@e65g2000hsc.googlegroups.com>
	<mailman.5124.1173937103.32031.python-list@python.org>
	<1173960067.782597.96840@e1g2000hsg.googlegroups.com>
	<1173962904.306751.86160@n76g2000hsh.googlegroups.com>
	<1173984908.706651.50260@y80g2000hsf.googlegroups.com>
	<1173986733.127500.250250@b75g2000hsg.googlegroups.com>
Message-ID: <1174010549.473733.270810@l77g2000hsb.googlegroups.com>

> > How is that really different from this:
>
> > class Disk(Folder):
> >   def __init__(self,driveLetter):
> >     Folder.Folder.__init__(self.path) # ???  Being that Folder is the
> > superclass?
>
> Where did self.path come from?  Even though Folder is the superclass,
> self.path doesn't exist until the Folder.__init__ method gets called.
> This ain't C++ you know.

My bad. I should have said:

class Disk(Folder):
  def __init__(self,driveLetter):
    Folder.Folder.__init__(self, driveLetter + ":/")

> Knock yourself out.  I just hacked together these Folder/Disk classes
> by way of a half-baked-but-working example.  My point is that to
> initialize a class level variable on class Foo, all that is needed is
> to assign it in the defining module, that is:
>
> class Foo:
>    pass
>
> Foo.fooClassVar = "a class level variable"

> Now any Foo or sub-Foo can access fooClassVar.  The type of
> fooClassVar can be anything you want, whether it is a Foo, subclass of
> Foo or whatever, as long as it has been defined by the time you assign
> fooClassVar.

That was the first thing I tried, but because the libs were importing
each other, etc, it got hung up with wierd "This module doesn't exist"
errors, when it clearly did.

~Sean





From irstas at gmail.com  Thu Mar 29 16:40:51 2007
From: irstas at gmail.com (irstas at gmail.com)
Date: 29 Mar 2007 13:40:51 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
Message-ID: <1175200851.955161.169930@n76g2000hsh.googlegroups.com>

On Mar 29, 9:19 pm, aral... at aol.com wrote:
> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan

Python's standard module "ai" has a function called
"generateFakeReview". I believe it does what you want, but I haven't
used it myself.



From gherzig at fmed.uba.ar  Wed Mar 14 11:33:53 2007
From: gherzig at fmed.uba.ar (Gerardo Herzig)
Date: Wed, 14 Mar 2007 12:33:53 -0300
Subject: getting user id (from an arbitrary sys user)
Message-ID: <45F815E1.5020608@fmed.uba.ar>

hi all. What i need to know is if there is some function like 
os.getuid(), but taking an argument (the username, off course), so i can 
do getuid('myuser')

Thanks you dudes!

Gerardo


From kushal.kumaran at gmail.com  Thu Mar 15 01:53:18 2007
From: kushal.kumaran at gmail.com (Kushal Kumaran)
Date: 14 Mar 2007 22:53:18 -0700
Subject: Add readline capability to existing interactive program [OT]
In-Reply-To: <1173906335.314773.73790@y80g2000hsf.googlegroups.com>
References: <1173906335.314773.73790@y80g2000hsf.googlegroups.com>
Message-ID: <1173937998.813809.94900@l77g2000hsb.googlegroups.com>


Jacob Rael wrote:
> Hello,
>
> I use an interactive simulator/data plotter called ocean. I get really
> frustrated using it because it does not have basic readline
> capabilities like ctrl-a for beginning of line and ctrl-k to kill the
> rest of the line.
>

I guess the easiest way would be this: http://freshmeat.net/projects/rlwrap/.
If you use Microsoft Windows, a cygwin version is available too,
apparently.

> <snipped>
--
Kushal Kumaran



From Robert.Katic at gmail.com  Sun Mar  4 07:03:26 2007
From: Robert.Katic at gmail.com (goodwolf)
Date: 4 Mar 2007 04:03:26 -0800
Subject: class attrdict
In-Reply-To: <1hud4hf.r52pr7wyx0adN%aleax@mac.com>
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
Message-ID: <1173009806.383478.50230@i80g2000cwc.googlegroups.com>

On Mar 3, 4:25 am, a... at mac.com (Alex Martelli) wrote:
> Hallvard B Furuseth <h.b.furus... at usit.uio.no> wrote:
>
> > Does this class need anything more?
> > Is there any risk of a lookup loop?
> > Seems to work...
>
> > class attrdict(dict):
> >     """Dict where d['foo'] also can be accessed as d.foo"""
> >     def __init__(self, *args, **kwargs):
> >         self.__dict__ = self
> >         dict.__init__(self, *args, **kwargs)
> >     def __repr__(self):
> >         return dict.__repr__(self).join(("attrdict(", ")"))
>
> The problem is mostly that, given an instance a of attrdict, whether you
> can call (e.g.) a.update(foo) depends on whether you ever set
> a['update'], making the whole program extremely fragile -- a very high
> price to pay for some modest amount of syntax sugar.
>
> Alex

Then you will prefer something like this:

class Namespace(object):
    def __init__(self, __ns={}, **kwargs):
        if kwargs: __ns.update(kwargs)
        self.__dict__ = __ns



From jhefferon at smcvt.edu  Fri Mar  2 08:08:24 2007
From: jhefferon at smcvt.edu (Jim)
Date: 2 Mar 2007 05:08:24 -0800
Subject: Writing an interpreter for language similar to python!!
In-Reply-To: <mailman.4555.1172731037.32031.python-list@python.org>
References: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
	<mailman.4555.1172731037.32031.python-list@python.org>
Message-ID: <1172840904.063553.94280@8g2000cwh.googlegroups.com>

On Mar 1, 1:16 am, "Hendrik van Rooyen" <m... at microcorp.co.za> wrote:
> This post begs the following questions:
>
> - Why make a new language, when
> - It is going to be an inferior subset of Python -
> - What can the motivation be to do this instead of contributing to the python
> effort?
Perhaps the OP only wants to learn something about compilers or
parsing, or something like that?

Jim



From rocky at panix.com  Fri Mar 23 07:59:09 2007
From: rocky at panix.com (R. Bernstein)
Date: 23 Mar 2007 07:59:09 -0400
Subject: Help controlling CDROM from python
References: <mailman.4902.1173538866.32031.python-list@python.org>
Message-ID: <wihy7lof9wy.fsf@panix3.panix.com>

If you want an OS neutral way one may be able to use pycdio from the
Cheese shop.

It requires libcdio to be installed and that sometimes the case if you
have a free media player (like vlc or xine, or mplayer) installed.

I don't really use it all that often so I can't vouch for how good it
is. (Although there *are* regression tests). 

Ognjen Bezanov <Ognjen at mailshack.com> writes:

> Hello,
> 
> I am trying to control a CD-ROM drive using python. The code I use is
> shown below.
> 
> > import CDROM
> > from fcntl import ioctl
> > import os
> > 
> > 
> > class Device:
> > 
> > 	CDdevice=""
> > 	CDfd = None
> > 	
> > 	def __init__(self,name):
> > 		self.CDdevice = name	#we get a device name when module loaded
> > 		
> > 		if self.CDdevice == "":
> > 			print "No device specified"
> > 			sys.exit(-1)
> > 		self.openCD()	
> > 		
> > 	def openCD(self):
> > 			
> > 		try:
> > 			self.CDfd = open(self.CDdevice, 'r') #open the device and return filedescriptor 
> > 		
> > 		except(OSError,IOError): #if there is an OS or IO Error (usually indicates nodisk)
> > 			print "Device Error, Halting.... (usually means drive or disk not found)"  
> > 			sys.exit(-1)
> 
> >	def unlockCD(self):
> > 		return self.sendCDcommand(CDROM.CDROM_LOCKDOOR,0)
> 
> > 	def ejectCD(self):
> > 		self.unlockCD() #we need to unlock the CD tray before we try to eject, otherwise we get an IO Error (#5)
> > 		return self.sendCDcommand(CDROM.CDROMEJECT)
> > 	
> 
> 
> > 	def sendCDcommand(self,command,argument=''):
> > 	    return ioctl(self.CDfd,command,argument)
> > 	    	
> 
> 
> 
> The code that calls the class is a follows:
> 
> > import CD_Bindings
> > 
> > CD = CD_Bindings.Device("/dev/cdrom")
> > 
> > print CD.ejectCD()
> 
> This works great, but only when there is a disk inside, otherwise we get
> an error.
> 
> My issue is that I need to be able to eject the CDROM tray even if there
> is no disk inside.
> 
> This is possible because other programs (like the linux "eject" command)
> can do it. Its just a question of how it is done in python. So I'm
> posting here in the hope someone can tell me.
> 
> Thanks,
> 
> Ognjen


From http  Wed Mar 14 12:28:41 2007
From: http (Paul Rubin)
Date: 14 Mar 2007 08:28:41 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
	<1173843736.982126.211530@l77g2000hsb.googlegroups.com>
	<pan.2007.03.14.07.02.32.652175@REMOVEME.cybersource.com.au>
	<7xabygti89.fsf@ruckus.brouhaha.com>
	<pan.2007.03.14.08.25.45.281805@REMOVEME.cybersource.com.au>
	<pan.2007.03.14.08.34.45.127052@REMOVEME.cybersource.com.au>
Message-ID: <7x7itjdc1y.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> >>> list(_partitions(25, 24))
> [(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2)]
> >>> list(_partitions(25, 25))
> []

Hmm.  I'll look into this later if I get a chance.  Thanks.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  2 15:28:06 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 02 Mar 2007 21:28:06 +0100
Subject: class declaration shortcut
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
	<54nlkgF21ft8aU3@mid.individual.net>
	<pan.2007.03.02.02.15.56.940730@REMOVEME.cybersource.com.au>
	<54qsj0F21kdccU1@mid.individual.net>
	<1172854988.054997.264620@j27g2000cwj.googlegroups.com>
Message-ID: <54rfmmF22ck5iU3@mid.individual.net>

Arnaud Delobelle wrote:

> Don't see it as the first name a class is bound to, but rather as
> the name a class is defined as.
> If class_object.__name__ == 'Foo' it means that somewhere in your
> code there is a class definition:
> 
> class Foo:
>     # stuff
> 
> Same for function: if function_object.__name__ == 'bar' it means
> that somewhere you have
> 
> def bar(...):
>     # stuff
> 
> (Of course this is not the case if you use another way to define
> functions or classes, e.g. type() )

This is somehow contrary to my understanding of the Python names
concept.

What if I use a loop to define several classes based on data --
they'll all have the same __name__ unless I change it manually.

Having this __name__ attribute set seems to me like "magic behind
the lines" which Python strives to evade, doesn't it? Personally,
I'd prefer inserting a mechanism for this manually if and when I
really need the functionality, but see below.

> What I described above is quite useful I think.  The alternative
> (anonymous classes) is that given an object myobj you have no
> means to find out what its class is (by that I mean to be able to
> locate the class definition in your source code), apart from
> stabbing in the dark (i.e. trying type(myobj)==someclass until
> successful).

In the typical case where you have one name per class definition,
yes.

Perhaps I'm lacking a typical application of __name__; that must be
why I'm so stubborn here ;)

Regards,


Bj?rn

-- 
BOFH excuse #419:

Repeated reboots of the system failed to solve problem



From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 18:21:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 00:21:02 +0100
Subject: Is every number in a list in a range?
In-Reply-To: <1173133962.488310.80120@n33g2000cwc.googlegroups.com>
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<1173133962.488310.80120@n33g2000cwc.googlegroups.com>
Message-ID: <45ec9de3$0$23922$426a74cc@news.free.fr>

MonkeeSage a ?crit :
> On Mar 5, 1:03 pm, "Steven W. Orr" <ste... at syslang.net> wrote:
> 
>>I have a list ll of intergers. I want to see if each number in ll is
>>within the range of 0..maxnum
> 
> 
> How about:
> 
> maxnum = 100
> inlist = range(90, 120)
> for i in [i for i in inlist if i >= 0 and i <= maxnum]:

                               if 0 <= i <= maxnum

>     # do something with i, it's in the valid range
>     print i

But I guess Steven is able to come up with such a solution by itself !-)



From mail at timgolden.me.uk  Thu Mar 15 15:58:26 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 15 Mar 2007 19:58:26 +0000
Subject: os.path.isfile with *.tar.gz
In-Reply-To: <09042D621CD4AA479C678463F3A646D0E87D10@sottemail1.ent.ad.cognos.com>
References: <09042D621CD4AA479C678463F3A646D0E87D10@sottemail1.ent.ad.cognos.com>
Message-ID: <45F9A562.5050101@timgolden.me.uk>

Boudreau, Emile wrote:
> Hello All,
>         I'm new to Python and it looks like people that post here do get 
> a good answer back so I figured I'd try my luck.
> 
> I'm trying to check a directory to see if there is a file that has the 
> name "startOfString" + some version number + "inst.tar.gz" 
> (component-8.3.16-inst.tar.gz) The version number will change quite 
> frequently so I just want to check if there is a file with that format name.
> 
> I have tried variations of: os.path.isfile( os.path.join("C:\\temp\\", 
> "rqp-win32-app", "*.tar.gz"))
> but nothing seem to work. Does anyone have suggestions on how I could 
> get this to work?

Well os.path.isfile checks for the existence of one specific
file. Since there isn't a file called c:\temp\rqp-win32-app\*.tar.gz
it will return False. Take a look at the glob module. This will
return a list of files matching a pattern in the way you're
suggesting. Since a non-empty list is True, and an empty one
False in Python, something like the following code might
work: (untested)

<code>
import glob

if glob.glob (r"c:\temp\rqp-win32-app\*.tar.gz"):
   print "At least one file matched"
else:
   print "No files matched"

</code>

TJG


From jstroud at mbi.ucla.edu  Thu Mar  8 15:18:09 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 08 Mar 2007 12:18:09 -0800
Subject: tkinter text editor
In-Reply-To: <espoab$1ed$1@ss408.t-com.hr>
References: <espfgv$6q7$1@ss408.t-com.hr> <espfmi$7ev$1@ss408.t-com.hr>
	<mailman.4808.1173376612.32031.python-list@python.org>
	<espoab$1ed$1@ss408.t-com.hr>
Message-ID: <espr21$qkq$1@daisy.noc.ucla.edu>

Gigs_ wrote:
> jim-on-linux wrote:
> 
>> On Friday 09 March 2007 12:04, Gigs_ wrote:
>>
>>> Gigs_ wrote:
>>>
>>>> I'm writing text editor.
>>>>
>>>> How to enable/disable (cut, copy etc.) when
>>>> text is selected/not selected
>>>
>>> Btw it is cut copy ... in edit menu
>>
>>
>>
>> state = 'diabled'   ## no change allowed
>>                            ## to Text Wiget 
>> state = 'normal'  ## default for Text Wiget
>>
>> jim-on-linux
>> http:\\www.inqvista.com
> 
> yes man but i want to make that when there is no selected text this menu 
> items go DISABLED and when text is selected this menu items go NORMAL

You have to methodically determine on an event by event basis what is 
going to cause selection and what isn't, then update the menus 
accordingly. It takes a lot of testing. An alternative is polling 
whether text is selected at the moment but is a waste of CPU cycles and 
is unnecessary.

Best is to let the system clipboard handle copy-paste as it was designed 
to do. You are opening a can of worms trying to micromanage your 
application.

James


From ptmcg at austin.rr.com  Thu Mar 29 11:33:50 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 29 Mar 2007 08:33:50 -0700
Subject: A nice way to use regex for complicate parsing
In-Reply-To: <mailman.5757.1175179405.32031.python-list@python.org>
References: <1175178887.494344.313070@d57g2000hsg.googlegroups.com>
	<mailman.5757.1175179405.32031.python-list@python.org>
Message-ID: <1175182430.111980.253090@e65g2000hsc.googlegroups.com>

On Mar 29, 9:42 am, Shane Geiger <sgei... at ncee.net> wrote:
> It would be worth learning pyparsing to do this.
>

Thanks to Shane and Steven for the ref to pyparsing.  I also was
struck by this post, thinking "this is pyparsing written in re's and
dicts".

The approach you are taking is *very* much like the thought process I
went through when first implementing pyparsing.  I wanted to easily
compose expressions from other expressions.  In your case, you are
string interpolating using a cumulative dict of prior expressions.
Pyparsing uses various subclasses of the ParserElement class, with
operator definitions for alternation ("|" or "^" depending on non-
greedy vs. greedy), composition ("+"), and negation ("~").  Pyparsing
also uses its own extended results construct, ParseResults, which
supports named results fields, accessible using list indicies, dict
names, or instance names.

Here is the pyparsing treatment of your example (I may not have gotten
every part correct, but my point is more the similarity of our
approaches).  Note the access to the smtp parameters via the Dict
transformer.

-- Paul


from pyparsing import *

# <dotnum> ::= <snum> "." <snum> "." <snum> "." <snum>
intgr = Word(nums)
dotnum = Combine(intgr + "." + intgr + "." + intgr + "." + intgr)

# <dot-string> ::= <string> | <string> "." <dot-string>
string_ = Word(alphanums)
dotstring = Combine(delimitedList(string_,"."))

# <domain> ::=  <element> | <element> "." <domain>
domain = dotnum | dotstring

# <q> ::= any one of the 128 ASCII characters except <CR>, <LF>, quote
("), or backslash (\)
# <x> ::= any one of the 128 ASCII characters (no exceptions)
# <qtext> ::=  "\" <x> | "\" <x> <qtext> | <q> | <q> <qtext>
# <quoted-string> ::=  """ <qtext> """
quotedString = dblQuotedString  # <- just use pre-defined expr from
pyparsing

# <local-part> ::= <dot-string> | <quoted-string>
localpart = (dotstring | quotedString).setResultsName("localpart")

# <mailbox> ::= <local-part> "@" <domain>
mailbox = Combine(localpart + "@" + domain).setResultsName("mailbox")

# <path> ::= "<" [ <a-d-l> ":" ] <mailbox> ">"
# also accept address without <>
path = "<" + mailbox + ">" | mailbox

# esmtp-keyword    ::= (ALPHA / DIGIT) *(ALPHA / DIGIT / "-")
esmtpkeyword = Word(alphanums,alphanums+"-")

# esmtp-value      ::= 1*<any CHAR excluding "=", SP, and all
esmtpvalue = Regex(r'[^= \t\r\n\f\v]*')

# ; syntax and values depend on esmtp-keyword
#                      control characters (US ASCII 0-31inclusive)>
# esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
# esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
esmtpparameters = Dict(
    ZeroOrMore( Group(esmtpkeyword + Suppress("=") + esmtpvalue) ) )

# esmtp-cmd        ::= inner-esmtp-cmd [SP esmtp-parameters] CR LF
esmtp_addr = path + \
                Optional(esmtpparameters,default=[])\
                .setResultsName("parameters")

for t in tests:
        for keyword in [ 'MAIL FROM:', 'RCPT TO:' ]:
                keylen=len(keyword)
                if t[:keylen].upper()==keyword:
                        t=t[keylen:]
                break

        try:
            match = esmtp_addr.parseString(t)
            print 'MATCH'
            print match.dump()
            # some sample code to access elements of the parameters
"dict"
            if "SIZE" in match.parameters:
                print "SIZE is", match.parameters.SIZE
            print
        except ParseException,pe:
            print 'DONT match', t

prints:
MATCH
['<', ['johnsmith at addresscom'], '>']
- mailbox: ['johnsmith at addresscom']
  - localpart: johnsmith
- parameters: []

MATCH
[['johnsmith at addresscom']]
- mailbox: ['johnsmith at addresscom']
  - localpart: johnsmith
- parameters: []

MATCH
['<', ['johnsmith at addresscom'], '>', ['SIZE', '1234'], ['OTHER',
'foo at bar.com']]
- OTHER: foo at bar.com
- SIZE: 1234
- mailbox: ['johnsmith at addresscom']
  - localpart: johnsmith
- parameters: [['SIZE', '1234'], ['OTHER', 'foo at bar.com']]
  - OTHER: foo at bar.com
  - SIZE: 1234
SIZE is 1234

MATCH
[['johnsmith at addresscom'], ['SIZE', '1234'], ['OTHER', 'foo at bar.com']]
- OTHER: foo at bar.com
- SIZE: 1234
- mailbox: ['johnsmith at addresscom']
  - localpart: johnsmith
- parameters: [['SIZE', '1234'], ['OTHER', 'foo at bar.com']]
  - OTHER: foo at bar.com
  - SIZE: 1234
SIZE is 1234

MATCH
['<', ['"tom at is.a> legal=email"@addresscom'], '>']
- mailbox: ['"tom at is.a> legal=email"@addresscom']
  - localpart: "tom at is.a> legal=email"
- parameters: []

MATCH
[['"tom at is.a> legal=email"@addresscom']]
- mailbox: ['"tom at is.a> legal=email"@addresscom']
  - localpart: "tom at is.a> legal=email"
- parameters: []

MATCH
['<', ['"tom at is.a> legal=email"@addresscom'], '>', ['SIZE', '1234'],
['OTHER', 'foo at bar.com']]
- OTHER: foo at bar.com
- SIZE: 1234
- mailbox: ['"tom at is.a> legal=email"@addresscom']
  - localpart: "tom at is.a> legal=email"
- parameters: [['SIZE', '1234'], ['OTHER', 'foo at bar.com']]
  - OTHER: foo at bar.com
  - SIZE: 1234
SIZE is 1234

MATCH
[['"tom at is.a> legal=email"@addresscom'], ['SIZE', '1234'], ['OTHER',
'foo at bar.com']]
- OTHER: foo at bar.com
- SIZE: 1234
- mailbox: ['"tom at is.a> legal=email"@addresscom']
  - localpart: "tom at is.a> legal=email"
- parameters: [['SIZE', '1234'], ['OTHER', 'foo at bar.com']]
  - OTHER: foo at bar.com
  - SIZE: 1234
SIZE is 1234



From melirizarry at gmail.com  Fri Mar  2 15:55:34 2007
From: melirizarry at gmail.com (Mel)
Date: 2 Mar 2007 12:55:34 -0800
Subject: How do I Color a QTableView row in PyQt4
In-Reply-To: <1172757917.160687.228650@z35g2000cwz.googlegroups.com>
References: <1172685355.820708.149990@q2g2000cwa.googlegroups.com>
	<29fbf$45e61974$54d1d767$18593@news.chello.no>
	<1172757917.160687.228650@z35g2000cwz.googlegroups.com>
Message-ID: <1172868934.591655.299800@j27g2000cwj.googlegroups.com>

Now that I can change the row colors of QTableView when loading data I
now need to be able to set the color of the row at anytime.  I've been
trying by using an item delegate but I'm not sure if I'm using it
correctly.  Would I try and set an item delegate for the row and
change the background color that way?  An example or a link to easy to
understand documentation on changing a row color for an object based
on QTableView using QSqlQueryModel as a model would be greatly
appreciated.  I'm still a bit confused in Qt4.

Mel



From danb_83 at yahoo.com  Sat Mar 10 12:47:43 2007
From: danb_83 at yahoo.com (Dan Bishop)
Date: 10 Mar 2007 09:47:43 -0800
Subject: unsigned integer?
In-Reply-To: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
Message-ID: <1173548863.033277.223420@v33g2000cwv.googlegroups.com>

On Mar 10, 11:32 am, "Jack" <nos... at invalid.com> wrote:
> This is a naive question:
>
> "%u" % -3
>
> I expect it to print 3. But it still print -3.
>
> Also, if I have an int, I can convert it to unsigned int in C:
>    int i = -3;
>    int ui = (unsigned int)i;
>
> Is there a way to do this in Python?

def unsigned(n):
    return n & 0xFFFFFFFF



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 11 18:42:35 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 23:42:35 +0100
Subject: Bitpacked Data
References: <45f47994$0$37205$4fafbaef@reader3.news.tin.it>
Message-ID: <55jeurF23phoqU1@mid.individual.net>

none wrote:

> i need to interface python with a bitpacked data file,
> the structure recorded in the file is the following:
> 
> struct {
> var_1 4bit
> var_2 6bit
> var_3 2bit
> var_3 4bit
> }

Strange data types. What language is this?
 
> how can read the struct and convert data into dictionary

I'd use the module struct, with bit shifting operators to extract
the bits.


Regards,


Bj?rn

-- 
BOFH excuse #232:

Ionization from the air-conditioning



From greg at cosc.canterbury.ac.nz  Tue Mar 20 02:27:43 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Tue, 20 Mar 2007 18:27:43 +1200
Subject: Still the __new__ hell ...
In-Reply-To: <mailman.5315.1174359956.32031.python-list@python.org>
References: <1174167360.522350@jubilee.claranet.pt>	<45fe7f46$0$2138$426a74cc@news.free.fr>	<1174337519.926611@jubilee.claranet.pt>	<568s5gF287c68U2@mid.individual.net>
	<mailman.5315.1174359956.32031.python-list@python.org>
Message-ID: <569dbjF27voecU1@mid.individual.net>

Steve Holden wrote:

>  >>> basestring
> <type 'basestring'>

You're right, I'm not sure what made me think it
was a tuple. Maybe because people used to write
isinstance(x, (str, unicode)) before basestring
existed.

--
Greg


From carsten at uniqsys.com  Tue Mar 20 20:37:07 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Tue, 20 Mar 2007 20:37:07 -0400
Subject: mysterious unicode
In-Reply-To: <1174434442.142511.37240@p15g2000hsd.googlegroups.com>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<mailman.5357.1174433396.32031.python-list@python.org>
	<1174434442.142511.37240@p15g2000hsd.googlegroups.com>
Message-ID: <1174437427.3251.3.camel@localhost.localdomain>

On Tue, 2007-03-20 at 16:47 -0700, Gerry wrote:
> I'm still mystified why:
>    qno was ever unicode,

Thus quoth http://www.lexicon.net/sjmachin/xlrd.html "This module
presents all text strings as Python unicode objects."

-Carsten




From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 18 01:19:39 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 18 Mar 2007 16:19:39 +1100
Subject: List to string
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
Message-ID: <pan.2007.03.18.05.19.37.992203@REMOVE.THIS.cybersource.com.au>

On Sat, 17 Mar 2007 21:28:56 -0700, Hitesh wrote:

> 
> Hi,
> 
> I've a list like this..
> str1 = ['this is a test string inside list']

That's a bad name for the variable. It's called "str1" but it is a list.


> I am doing it this way.
> 
> for s in str1:
>     temp_s = s
>     print temp_s

That's redundant. Why not just "print s"? That will work perfectly.


You can do any of the following, depending on what you are trying to do.


my_list = ["first string", "second string", "third string"]

# print the entire list as a string
print my_list

# print each string individually
for s in my_list:
    print s

# save the string representation of the entire list as a variable
my_str = repr(my_list)
another_str = str(my_list)

Note that repr() and str() may have different results, depending on the
type of object you pass into them.


# extract the first string into another variable
my_str = my_list[0]

# insert the third string into another string
my_string = "This is the %s here." % my_list[2]


Hope that helps.


-- 
Steven.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 12 12:56:35 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 12 Mar 2007 17:56:35 +0100
Subject: Python in a desktop environment
In-Reply-To: <55lbl1F25geaaU1@mid.uni-berlin.de>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<55lbl1F25geaaU1@mid.uni-berlin.de>
Message-ID: <45f58642$0$1408$426a74cc@news.free.fr>

Diez B. Roggisch a ?crit :
> Bruno Desthuilliers wrote:
> 
>> Grant Edwards a ?crit :
>> (snip)
>>
>>> Python is _far_ more robust than C++.
>>>
>> I wouldn't say so - robustness is a quality of a program, not of a
>> language !-)
> 
> Nope. Dealing with dangling references and double frees, complex
> copy-semantics that change only by a feeble character or via overloaded and
> thus hard to comprehend assignment operators are all properties of C++,

Indeed

> and
> tremendously afflict robustness IMHO.

robustness of programs written with this language, yes.

NB : I'm afraid the smiley got lost somewhere between screen and 
readers, so here comes another one !-)


From bbxx789_05ss at yahoo.com  Fri Mar 16 12:36:20 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 09:36:20 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <1174059534.271524.175440@b75g2000hsg.googlegroups.com>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
	<1174059534.271524.175440@b75g2000hsg.googlegroups.com>
Message-ID: <1174062980.283874.317040@b75g2000hsg.googlegroups.com>

On Mar 16, 9:38 am, "7stud" <bbxx789_0... at yahoo.com> wrote:
> -----
> import os
>
> filepath = "./change_files"
>
> li = os.listdir(filepath)
> for name in li:
>         fullpath = filepath + "/" + name
>         if os.path.isfile(fullpath):
>                 infile = open(fullpath, 'r')
>
>                 lastDotPos = fullpath.rfind(".")
>                 fileName = fullpath[:lastDotPos]
>                 ext = fullpath[lastDotPos:]
>                 tempName = fileName + ext + ".temp"
>
>                 outfile = open(tempName, "w")
>                 for line in infile:
>                         outfile.write(line + "altered\n")
>                 outfile.close()
>
>                 os.remove(fullpath)
>                 os.rename(tempName, tempName[:-5])
> ---------------
>

I did some unnecessary name manipulation in there.  Try this:

filepath = "./change_files"

li = os.listdir(filepath)
for name in li:
        fullpath = filepath + "/" + name
        if os.path.isfile(fullpath):
                infile = open(fullpath, 'r')

                tempName = fullpath + ".temp"
                outfile = open(tempName, "w")
                for line in infile:
                        outfile.write(line + "altered\n")
                outfile.close()

                os.remove(fullpath)
                os.rename(tempName, tempName[:-5])



From fumanchu at amor.org  Tue Mar  6 18:51:59 2007
From: fumanchu at amor.org (fumanchu)
Date: 6 Mar 2007 15:51:59 -0800
Subject: is it possible to give an instance a value?
In-Reply-To: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
Message-ID: <1173225119.344413.193240@64g2000cwx.googlegroups.com>

On Mar 6, 2:45 pm, "manstey" <mans... at csu.edu.au> wrote:
> The question is, is it possible for an instance to have a value (say a
> string, or integer) that can interact with other datatypes and be
> passed as an argument?
>
> The following code of course gives an error:
>
> class Test(object):
>      def __init__(self, val):
>            self.val = val
>
> >>> a = Test('hello')
> >>> a.val  + ' happy'
> 'hello happy'
> >>> a + 'happy'
>
> TypeError: unsupported operand type(s) for +: 'Test' and 'str'
>
> Is there a way to make a have the value a.val when it is used as
> above, or as an argument (eg function(a, 10, 'sdf') etc)?
>
> The only fudge I discovered for simple addition was to add to the
> class
>
>    def __add__(self, obj):
>        return a.val + obj
>
> but this doesn't solve the problem in general. I have tried
> subclassing the string type, but as it is immutable, this is not
> flexible the way a.val is (i.e. it can't e reassigned and remain a
> subclass).
>
> Any pointers, or is my question wrong-headed?
>
> btw, my motivation is wanting to mimic another oo language which
> allows this, so it allows:
>
> >>>Person.Address
> 'Sydney'
> >>>Person.Address.type
> '%String'
> >>>Person.Address = 'Canberra'
> >>>print Person.Address. Person.Address.type
>
> Canberra %String
>
> etc.
>
> We have had to implement Person.Address as Person.Address.val, making
> Address an instance with .val, .type, etc.

The question is not, "is it possible for an instance to have a
value?", but "is it possible for a value to have other attributes?" If
you really need them, you want Python descriptors, which are described
here: http://docs.python.org/ref/descriptors.html. However, if type is
the only value metadata you care about, you probably don't need them
(just use the builtin 'type' function on any object).


class TypedAttribute(object):

    def __init__(self, type=unicode):
        self.type = type

    def __get__(self, obj, unitclass=None):
        if obj is None:
            # When calling on the class instead of an instance...
            return self
        else:
            return obj._attributes[self.key]

    def __set__(self, obj, value):
        obj._attributes[self.key] = value

    def __delete__(self, obj):
        raise AttributeError("TypedAttributes may not be deleted.")


class Person(object):

    Address = TypedAttribute(str)

    def __init__(self):
        self._attributes = {}


I'm using the _attributes dict here just by convention; I find it
convenient to store the underlying values in each parent object. There
are other ways to do it.


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From kyosohma at gmail.com  Mon Mar 19 17:12:53 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 19 Mar 2007 14:12:53 -0700
Subject: struct.pack returns nothing [2]
In-Reply-To: <mailman.5270.1174281895.32031.python-list@python.org>
References: <20070319051239.GA8214@lacordilleraandina.com.ar>
	<mailman.5270.1174281895.32031.python-list@python.org>
Message-ID: <1174338773.598674.26650@b75g2000hsg.googlegroups.com>

On Mar 19, 12:22 am, andma... at gmail.com wrote:
> On Mon, Mar 19, 2007 at 02:12:39AM -0300, andma... at gmail.com wrote:
> > If I build a strict with:
>
> Sorry, I meant script.
>
> > import struct
> > print struck.pack ('i', 1)
>
> > it returns a '\n'.
> > What's wrong with it???
> > :(
>
> --
> Andr?s M.
> ---------------------------------------------

When I run it, I get '\x01\x00\x00\x00'

This is my first time using the module, so I really can't be of much
help. I recommend that you read the docs at:

http://docs.python.org/lib/module-struct.html

This may be helpful to you as well:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/498149

Mike



From phil at riverbankcomputing.co.uk  Sat Mar  3 12:17:31 2007
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sat, 3 Mar 2007 17:17:31 +0000
Subject: qcombobox.findtext and matchflags.matchendswith
In-Reply-To: <1172940731.443430.161910@30g2000cwc.googlegroups.com>
References: <1172940731.443430.161910@30g2000cwc.googlegroups.com>
Message-ID: <200703031717.31066.phil@riverbankcomputing.co.uk>

On Saturday 03 March 2007 4:52 pm, borntonetwork wrote:
> Hi.
>
> Using the PyQt4 library, I am trying to use the following
> function("cbo" is a qtcombobox):
>
> cbo.findText(searchStr, QtCore.MatchEndsWith)
>
> If I don't use the "QtCore.MatchEndsWith", the function works
> properly, but doesn't return partial matches ending with "searchStr".
> If I use "QtCore.MatchEndsWith", I get the following error:
>
> AttributeError: 'module' object has no attribute 'MatchEndsWith'
>
> I've tried substituting the actual number that the enumerator
> represents, which gives me a typeerror message complaining that the
> argument has an invalid type.
>
> Any suggestions?

QtCore.Qt.MatchEndsWith

Phil


From __peter__ at web.de  Fri Mar  2 13:23:07 2007
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Mar 2007 19:23:07 +0100
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
References: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
Message-ID: <es9pvf$noj$02$1@news.t-online.com>

paduffy at cisco.com wrote:

> I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
> Reading a file of 13 GBytes, one line at a time.  It appears that,
> once the read line passes the 4 GByte boundary, I am getting
> occasional random line concatenations.  Input file is confirmed good
> via UltraEdit.  Groovy version of the same app runs fine.
> 
> Any ideas?

Do you open the file in  universal newline mode -- open(filename, "U") --,
and if not, does the problem persist if you do?

Peter


From gagsl-py2 at yahoo.com.ar  Mon Mar  5 22:15:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 Mar 2007 00:15:42 -0300
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
Message-ID: <op.toqzcgi9x6zn5v@gabriel2.softlabbsas.com.ar>

En Sat, 03 Mar 2007 19:55:16 -0300, Steven D'Aprano  
<steve at REMOVE.THIS.cybersource.com.au> escribi?:

> I personally don't see that pop has any advantage, especially since the
> most useful example
>
> while some_dict:
>     do_something_with(some_dict.pop())
>
> doesn't work. Instead you have to write this:

For such constructs, one can use popitem:

while some_dict:
     do_something_with(some_dict.popitem()[1])

The popitem method is older than pop. I don't like pop either.

-- 
Gabriel Genellina



From bill.tydeman at gmail.com  Mon Mar  5 14:49:33 2007
From: bill.tydeman at gmail.com (Bill Tydeman)
Date: Mon, 5 Mar 2007 14:49:33 -0500
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
In-Reply-To: <45EB17F8.4070704@cisco.com>
References: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
	<501e09e0703030508i6d92e313sa412d352c998564b@mail.gmail.com>
	<45EB17F8.4070704@cisco.com>
Message-ID: <501e09e0703051149m3034c11chbabfd44599e0cdfa@mail.gmail.com>

On 3/4/07, Paul Duffy <paduffy at cisco.com> wrote:
>
> Bill Tydeman wrote:
> > Just curious, but since the file size limitation on NTFS is 4 GB, have
> > you confirmed that it isn't some other part of the interaction that is
> > causing the problem?   What FS is hosting the files?
> I don't think that is correct.  Groovy version of app runs just fine.'



That should have been pre-NTFS (i.e. FAT32) but I have had problems with
files larger than 4GB on NTFS.
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From python at rcn.com  Tue Mar  6 17:45:24 2007
From: python at rcn.com (Raymond Hettinger)
Date: 6 Mar 2007 14:45:24 -0800
Subject: Descriptor/Decorator challenge
In-Reply-To: <1173151593.219310.122180@p10g2000cwp.googlegroups.com>
References: <1173079890.154064.115300@p10g2000cwp.googlegroups.com>
	<1173151593.219310.122180@p10g2000cwp.googlegroups.com>
Message-ID: <1173221123.187840.168030@j27g2000cwj.googlegroups.com>

[George Sakkis]
> What would the semantics be if m is decorated as local only in A or
> only in B ?

The goal is to as closely as possible emulate the sematics of under-
under name mangling.


Raymond



From jeff.templon at gmail.com  Sun Mar  4 07:37:39 2007
From: jeff.templon at gmail.com (Jay Tee)
Date: 4 Mar 2007 04:37:39 -0800
Subject: Python 3.0 unfit for serious work?
In-Reply-To: <mailman.4374.1172405601.32031.python-list@python.org>
References: <U14Bh.45$Us7.35@newsfe04.lga>
	<irqdnTsGrpgfREnYnZ2dnUVZ_qDinZ2d@comcast.com>
	<mc5Bh.455$qL1.385@newsfe02.lga>
	<5tGdnWXg-a5hpkjYnZ2dnUVZ_ragnZ2d@comcast.com>
	<1171990150.797668.19770@p10g2000cwp.googlegroups.com>
	<740c3aec0702201247u5b7203f8u2e171d8272289e0@mail.gmail.com>
	<820fa4350702201304m61c15318l113c2dd8eb97de91@mail.gmail.com>
	<mailman.4374.1172405601.32031.python-list@python.org>
Message-ID: <1173011859.467283.173600@30g2000cwc.googlegroups.com>

Hey,

> Python 3.x.  I believe your fear is just a knee jerk reaction to the notion
> that there will be some stated incompatibilities between 2.x and 3.x without
> having done any investigation of the transition process.  Nobody is forcing
> you to do anything right now or completely abandon your code base.  Python
> 2.x still has a long shelf life.  Hell, 3.0a1 isn't even out yet.  If you

Thanks to the pointer to PyCon, if there is anything relevant maybe
you can send me off a mail (or post here) with some links.  About the
above : it isn't fear, I'm just telling you what I suspect might
happen.  My own little piece of code in the giant picture will remain
in python, unless i am mandated to move it to something else : I
*like* python.

I threw in my few cents here just because I suspect the python
community does not intend to move itself into the realm of
"interesting but not serious languages" like Oberon did.  I could be
wrong, both in the sense that maybe that *is* the intention, or maybe
making a backwards-incompatible "evolution" of the language won't hurt
python or it's users.  We now return to your regularly scheduled
program.

      J "back to the grind" T



From web at pobox.com  Wed Mar 21 09:34:37 2007
From: web at pobox.com (Dr. Who)
Date: 21 Mar 2007 06:34:37 -0700
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
Message-ID: <1174484076.994815.89820@y66g2000hsf.googlegroups.com>

Don't Feed The Trolls :-)



From mike.klaas at gmail.com  Mon Mar 12 18:47:09 2007
From: mike.klaas at gmail.com (Klaas)
Date: 12 Mar 2007 15:47:09 -0700
Subject: threading and iterator crashing interpreter
In-Reply-To: <1173730219.561059.165340@c51g2000cwc.googlegroups.com>
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
	<mailman.4935.1173613653.32031.python-list@python.org>
	<1173617253.901671.136910@q40g2000cwq.googlegroups.com>
	<mailman.4939.1173619757.32031.python-list@python.org>
	<1173623758.054666.18190@s48g2000cws.googlegroups.com>
	<1173730219.561059.165340@c51g2000cwc.googlegroups.com>
Message-ID: <1173739629.570503.259110@30g2000cwc.googlegroups.com>

On Mar 12, 1:10 pm, "Rhamphoryncus" <rha... at gmail.com> wrote:
> http://sourceforge.net/tracker/index.php?func=detail&aid=1579370&grou...
>
> That refers to a generator crash.  You are using generators, but also
> getting a weird dict error.  Maybe related, maybe not.
>
> I'll figure out if I've got a "fixed" version or not when I get back.

I was the one who filed the first bug.  login2 is definitely the same
bug: you have a generator running in a thread, but the thread is being
garbage collected before the generator's .close() method is run (which
references the thread state).

Try the patch I posted in the bug above; if it works, then python
trunk/5.1maint should work.

-Mike



From hitesh287 at gmail.com  Sun Mar 18 00:28:56 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 17 Mar 2007 21:28:56 -0700
Subject: List to string
Message-ID: <1174192136.371754.85500@l75g2000hse.googlegroups.com>


Hi,

I've a list like this..
str1 = ['this is a test string inside list']

I am doing it this way.

for s in str1:
    temp_s = s
    print temp_s

Any better suggestions?

Thank you,
hj



From virtk0s at gmail.com  Fri Mar 16 15:09:22 2007
From: virtk0s at gmail.com (virtk0s at gmail.com)
Date: 16 Mar 2007 12:09:22 -0700
Subject: Displaying EPS in a GUI
Message-ID: <1174072162.659381.75700@o5g2000hsb.googlegroups.com>

Does anybody know of a good way to display Encapsulated Postscript
images in a GUI? I'm currently using wx, but would be perfectly
willing to switch to another binding to keep the program from becoming
hackish.

Thanks!



From jeff at jmcneil.net  Tue Mar 13 13:28:51 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Tue, 13 Mar 2007 13:28:51 -0400
Subject: Server-side script takes way too long to launch
In-Reply-To: <d25b6e9a0703131012i484f0187uaffb1c080200a3a0@mail.gmail.com>
References: <e0582b0b0703131005q305ddb0dic7fdffd8811aaf22@mail.gmail.com>
	<d25b6e9a0703131012i484f0187uaffb1c080200a3a0@mail.gmail.com>
Message-ID: <82d28c40703131028n458bddd7gff5deb1d45703279@mail.gmail.com>

But even if the server was loading Python on each hit, which it will for
CGI, it shouldn't take "a count to 13", especially on localhost. That to me
is an indication of a further problem.  Does it take that long to load with
each hit, or just the first following a server restart?  What do log
timestamps say from initial hit until last-byte from your Python script?

Might want to validate your Apache configuration and have a look at
httpd.apache.org.  Sounds to me like DNS lookups are enabled or something of
the sort.

Thanks,

Jeff


On 3/13/07, Josh Bloom <joshbloom at gmail.com> wrote:
>
> Teresa, when you call a python script this way, the server needs to load
> the python interpreter for each call.
>
> If you need faster execution you should look into having a server process
> running already. Something like mod_python for apache or CherryPy will help
> you speed this up.
>
> -Josh
>
>
> On 3/13/07, Teresa Hardy < thardy99 at gmail.com> wrote:
>
> > I have a webpage calling a python script, using Apache
> > server....http://localhost/cgi-bin/mycode.py?dmn
> > I am using Firefox, WindowsXP Python 2.4
> >
> > I can count to 13 from the time I click to the time the browser finds
> > the path.
> >
> > The python runs okay when I finally get to it. In the first step it just
> > launches a Flash file. I benchmarked the time thru the python code and it
> > isn't the slow part. It's the launch. Forgive me if I am not explaining this
> > well. I am pretty much teaching myself...fumbling thru the process.
> >
> > Any suggestions on how to speed up the first step?
> >
> > Thanks,
> > Teresa
> >
> >
> >
> >
> >
> >
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From diefirma at comcast.net  Sun Mar  4 14:49:57 2007
From: diefirma at comcast.net (Nile)
Date: 4 Mar 2007 11:49:57 -0800
Subject: When will 2.5.1 be released?
Message-ID: <1173037797.127119.248300@h3g2000cwc.googlegroups.com>

This is not a big deal but I would like to use Tix with 2.5.  My
understanding is this bug will be fixed in the 2.5.1 release. Does
anyone know when this will be out ?  What is the best guess?

Thanks,

Nile



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 10 20:41:05 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 02:41:05 +0100
Subject: Help
References: <1173556145.150741.227160@n33g2000cwc.googlegroups.com>
Message-ID: <55h51hF258g2nU2@mid.individual.net>

Clement wrote:

> how to use Python/C API ............

http://www.catb.org/~esr/faqs/smart-questions.html#intro

HTH ............


Bj?rn

-- 
BOFH excuse #235:

The new frame relay network hasn't bedded down the software loop
transmitter yet. 



From bearophileHUGS at lycos.com  Fri Mar  2 19:07:03 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 2 Mar 2007 16:07:03 -0800
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <1172880423.176698.115670@p10g2000cwp.googlegroups.com>

Few suggestions, some important, some less important. All my
suggestions are untested.


Use 4 spaces to indent.


If you want to speed up this code you can move it inside a function.
After that, if you want to make it even faster you can use Psyco too.


Ho are the dates represented? How do you test what is the older one?


You seem to compute current.split("\t") and best.split("\t") many
times, so you can compute it once only.
You can keep best and best_splitted.


You can split the last line:
if best.split("\t")[1] != best.split("\t")[6] and \
   current.split("\t")[5] > best.split("\t")[5]:


input() is a builtin function, so you may want to use a different
name, or just:
for row in sys.stdin:


Instead of:
row = row.rstrip('\n')
You often may use just:
row = row.strip()


Instead of:
piid = row.split('\t')[0]
You can probably use (test it):
piid = row.split('\t', 1)[0]


Instead of:
if recs.has_key(piid) is False:
Better:
if piid not in recs:


Instead of (on Python 2.5):
recs = {}
for row in input:
    row = ...
    piid = ...
    if recs.has_key(piid) is False:
        recs[piid] = []
    recs[piid].append(row)
You can probably use:
from collection import defaultdict
recs = defaultdict(list)
for row in input:
    row = ...
    piid = ...
    recs[piid].append(row)


Instead of:
for piid in recs.keys():
You can use this, lazily:
for piid in recs:


Instead of:
for piid in recs.keys():
    best = ""
    for current in recs[piid]:
You can probably use:
for piid, piii_recs in recs.iteritems():
    best = ""
    for current in piii_recs:
But your version may be a little faster anyway.


Instead of:
best = ""
for current in recs[piid]:
    if best == "":
        best = current;
You may want to use the singleton None:
best = None
for current in recs[piid]:
    if best is None:
        best = current


Note that to read such files you may use the csv module (present in
the standard library).

You can try to modify the code and show us the second working version.

Bye,
bearophile



From ben at benfinney.id.au  Fri Mar 23 02:19:25 2007
From: ben at benfinney.id.au (Ben Finney)
Date: Fri, 23 Mar 2007 17:19:25 +1100
Subject: Making a non-root daemon process
Message-ID: <87d5301nyq.fsf@benfinney.id.au>

Howdy all,

For making a Python program calve off an independent daemon process of
itself, I found Carl J. Schroeder's recipe in the ASPN Python Cookbook.
<URL:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731>

This is a thorough approach, and I'm cribbing a simpler process from
this example. One thing that strikes me is that the algorithm seems to
depend on running the program as the root user.

    import os

    def become_daemon():
        pid = os.fork()
        if pid == 0:
            # This is the child of the fork

            # Become a process leader of a new process group
            os.setsid()

            # Fork again and exit this parent
            pid = os.fork()
            if pid == 0:
                # This is the child of the second fork -- the running process.
                pass
            else:
                # This is the parent of the second fork
                # Exit to prevent zombie process
                os._exit(0)
        else:
            # This is the parent of the fork
            os._exit(0)

    become_daemon()
    # Continue with the program


The double-fork seems to be to:
  - Allow the first forked child to start a new process group
  - Allow the second forked child to be orphaned immediately

The problem I'm having is that 'os.setsid()' fails with 'OSError:
[Errno 1] Operation not permitted' unless I run the program as the
root user. This isn't a program that I want necessarily running as
root.

What does the 'os.setsid()' gain me? How can I get that without being
the root user?

-- 
 \       "I went to a general store. They wouldn't let me buy anything |
  `\                                  specifically."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From mail at timgolden.me.uk  Thu Mar 29 03:50:03 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 Mar 2007 08:50:03 +0100
Subject: Finding User Profile path
In-Reply-To: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>
Message-ID: <460B6FAB.9000307@timgolden.me.uk>

kyosohma at gmail.com wrote:
> Hi,
> 
> I am trying to query our domain to get a list of our users profile
> locations. I thought I might be able to use WMI, but I can't get it to
> work. 

Can you be a bit more specific: did WMI itself not work? Or the
Python WMI module? What were the problems? (All this, obviously,
if you're interested in pursuing that path).

I am using a Windows XP Pro workstation and Python 2.4 on a
> mixed environment of Debian Linux (with Samba) and Windows servers. We
> are in the process of moving the user profiles from an NT box to a
> Debian box, but due to the many different servers in the organization,
> it is a pain to keep track of which have been moved and which haven't.

Have a look at the win32net module from the pywin32
extensions, specifically functions like NetUserGetInfo
and NetUserSetInfo. You have to pick your USER_INFO a
bit (look around the MSDN pages) but I think you can do
what you're after.

TJG


From luismgz at gmail.com  Mon Mar 19 21:42:38 2007
From: luismgz at gmail.com (=?iso-8859-1?q?Luis_M._Gonz=E1lez?=)
Date: 19 Mar 2007 18:42:38 -0700
Subject: Passing arguments to a command line from a python script
In-Reply-To: <mailman.5313.1174350370.32031.python-list@python.org>
References: <1174348016.873087.179750@d57g2000hsg.googlegroups.com>
	<mailman.5313.1174350370.32031.python-list@python.org>
Message-ID: <1174354958.815878.95020@d57g2000hsg.googlegroups.com>

On Mar 19, 9:25 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Mon, 19 Mar 2007 20:46:56 -0300, Luis M. Gonz?lez <luis... at gmail.com>
> escribi?:
>
> > What I want now is execute the script I just created.
> > As far as I know, the only way to execute the script is from a command
> > line and typing "setup.py py2exe".
>
> A few ways:
> - os.system("commandline"). Simplest way, but you don't have much control,
> and it blocks until the process finishes.
> - os.popen[234]? or the functions in the popen2 module
> - the subprocess module - the most complete way, but simple enough for
> most cases.
>
> --
> Gabriel Genellina



I'm sorry, but still I can't figure out this...
Would you please show me a sample usage of os.system or os.popen for
passing arguments to the command line?
In this case, I should pass to the command line "setuppy py2exe".

Thanks!
Luis




From jgodoy at gmail.com  Mon Mar 12 08:29:33 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 12 Mar 2007 09:29:33 -0300
Subject: setuptools and code.google.com
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1173629090.993914.55570@30g2000cwc.googlegroups.com>
	<mailman.4944.1173629658.32031.python-list@python.org>
	<1173631052.614449.51370@h3g2000cwc.googlegroups.com>
	<no_Ih.8899$PL.2303@newsread4.news.pas.earthlink.net>
	<7xy7m3tqq8.fsf@ruckus.brouhaha.com>
	<1173653364.059431.19990@v33g2000cwv.googlegroups.com>
	<7xps7f5ptp.fsf@ruckus.brouhaha.com>
	<1hutrb3.e1sbu5kvxk8nN%aleax@mac.com>
	<87odmznrbf.fsf@gmail.com> <1hutsxr.3pcc7j1w12q1oN%aleax@mac.com>
	<87fy8bnpny.fsf_-_@gmail.com> <1hutu78.816hpgmmhn8jN%aleax@mac.com>
Message-ID: <87slcave4y.fsf@gmail.com>

aleax at mac.com (Alex Martelli) writes:

> Hey, I'd just love to make it as easy as possible to get gmpy -- that's
> why I (shudder!-) even build and upload Windows installers...

Brave man! :-)

> OK, the .zip file IS there -- I don't know how to build .egg ones but of
> course I could study up on it -- can you suggest a URL?

The .egg is nice because it can be an already built binary.  

http://peak.telecommunity.com/DevCenter/setuptools

The URL above contains examples and instructions on how to use setuptools. 

> To be usable on Windows w/o effort, the packaged format must contain a
> .pyd (and, on Mac, a .so, etc).  Can a .egg deal w/that?

Yes.  I have a .egg that has a .so here, for rpy (http://rpy.sf.net/). 

> I need to find out w/certainty, because once I've uploaded a file w/a
> certain name I can't change the name, nor the contents -- the URLs on
> code.google.com are meant to be permanent...

Hmmm...  I'd suggest you to build only locally then...  I don't like this kind
of "permanent" things.  They could have a flag "publish this" to make it
permanent and make the standard "unpublished".  Here's a suggestion for you to
forward there inside Google... ;-)

> OK, but since most Windows users don't have a suitable C compiler, and
> many Mac ones never bother installing the C compiler that comes with
> their OS DVDs, if I'm to make things easy I definitely need to pack up
> binaries.  How do I pack binaries (for dynamic link libraries) that need
> to be very different on Win, Mac, various Linux distros...?

One build per platform would be my choice.  Packing everything together would
make the package too big (specially if you start supporting other OSs). 

> Me neither, knowing near to nothing about setuptools (I'm not even a
> user of it...). Let's hope some expert does speak up -- I can't just
> freely experiment with uploads and the like...

Lets wait. ;-)



Thanks again,
-- 
Jorge Godoy      <jgodoy at gmail.com>


From quentel.pierre at wanadoo.fr  Mon Mar  5 15:59:12 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 5 Mar 2007 12:59:12 -0800
Subject: Building a dictionary from a tuple of variable length
In-Reply-To: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>
References: <1173084222.565386.250510@h3g2000cwc.googlegroups.com>
Message-ID: <1173128351.888110.116120@t69g2000cwt.googlegroups.com>

Hi,

> Therefore, how do I build the tuple of Falses to reflect the length of my t tuple?

Yet another solution :

d = dict(zip(t,[False]*len(t)))

Pierre



From george.sakkis at gmail.com  Wed Mar  7 23:01:19 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Mar 2007 20:01:19 -0800
Subject: Bug in python!? persistent value of an optional parameter in
	function!
In-Reply-To: <NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
Message-ID: <1173326479.745131.176640@8g2000cwh.googlegroups.com>

On Mar 7, 10:14 pm, John Nagle <n... at animats.com> wrote:
> Paul Rubin wrote:
> > "C Barr Leigh" <cpblPub... at gmail.com> writes:
>
> >>Help! Have I found a serious bug?
> >>This seems like highly undesired behaviour to me. From the program
> >>below, I get output:
>
> > It is intentional, not a bug, see the docs.  Whether it's desirable is
> > a different question.
>
>     True.  It would make sense to disallow mutable values as
> initial values for optional arguments.  The present behavior
> is silly.

1. If you'd given it a little more thought than it took you to write
this, you would perhaps realize that it is in general impossible to
determine automatically whether an arbitrary object is mutable or
not.

2. Even if you could determine it, it would be overly restrictive to
disallow all mutable values from defaults. The fact that an object is
mutable doesn't mean that the function will try to mutate it:

def paintWall(ind, colormap={1:'red', 2:'blue', 5:'green'}):
    print "Let's paint the wall %s" % colormap[ind]


George



From hitesh287 at gmail.com  Mon Mar 19 12:38:22 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 19 Mar 2007 09:38:22 -0700
Subject: List to string
In-Reply-To: <45fe7ddc$0$25292$426a34cc@news.free.fr>
References: <1174192136.371754.85500@l75g2000hse.googlegroups.com>
	<1174192714.014092.79380@l77g2000hsb.googlegroups.com>
	<45fe7ddc$0$25292$426a34cc@news.free.fr>
Message-ID: <1174322302.516040.277140@y80g2000hsf.googlegroups.com>

On Mar 19, 8:11 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Hitesh a ?crit :
>
> > On Mar 18, 12:28 am, "Hitesh" <hitesh... at gmail.com> wrote:
> >> Hi,
>
> >> I've a list like this..
> >> str1 = ['this is a test string inside list']
>
> >> I am doing it this way.
>
> >> for s in str1:
> >>     temp_s = s
> >>     print temp_s
>
> Why this useless temp_s var ?
>
>
>
> >> Any better suggestions?
>
> >> Thank you,
> >> hj
>
> > I want to cast value of a list into string..
>
> There's no "cast" in Python. It would make no sens in a dynamically
> typed language, where type informations belong to the LHS of a binding,
> not the RHS.
>
> I guess that what you want is to build a string out of a list of
> strings. If so, the answer is (assuming you want a newline between each
> element of the list):
>
> print "\n".join(str1)


Thank you guys. Yes that helped. :)

hj




From lbates at websafe.com  Tue Mar 13 19:54:59 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 13 Mar 2007 18:54:59 -0500
Subject: Problem in importing fipy
In-Reply-To: <1173828122.608006.320670@p15g2000hsd.googlegroups.com>
References: <1173828122.608006.320670@p15g2000hsd.googlegroups.com>
Message-ID: <J9Kdnfg5-_lTpGrYnZ2dnUVZ_rOqnZ2d@comcast.com>

amitsoni.1984 at gmail.com wrote:
> Hi,
> 
> I am using fipy for solving an ODE on python.
> 
> I am getting an error in the line: "from fipy.meshes.grid1D import
> Grid1D", which says:
> ImportError: No module named fipy.meshes.grid1D
> Importing only fipy also gives a similar error.
> 
> I have Python2.4.4, numpy, matplotlib and fipy installed on my
> computer.
> 
> Can anyone help me with this?
> Is there any other package in Python with which I can solve ODE/PDEs?
> 
> Thank you,
> Amit
> 

Without knowing more we can only surmise that the place
where you installed fipy isn't on your PYTHONPATH so
python can't find the module.

If you haven't already, take a look at:

http://www.ctcms.nist.gov/fipy/installation.html

Manual looks quite good and covers installation well.

It appears you can go here and submit a ticket for help:

http://matforge.org/fipy/newticket

-Larry



From maxerickson at gmail.com  Mon Mar 26 12:11:16 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 26 Mar 2007 16:11:16 +0000 (UTC)
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
	<874po95hz5.fsf@gmail.com>
	<1174862657.151504.136350@b75g2000hsg.googlegroups.com>
	<KrENh.1571$Rg4.1085@newssvr19.news.prodigy.net>
Message-ID: <Xns98FF7BF70AF66maxericksongmailcom@80.91.229.5>

John Nagle <nagle at animats.com> wrote:

> htags = soup.findAll({'h2':True, 'H2' : True}) # get all H2 tags,
> both cases 

Have you been bitten by this? When I read this, I was operating under 
the assumption that BeautifulSoup wasn't case sensitive, and then I 
tried this:

>>> import BeautifulSoup as BS

>>> soup=BS.BeautifulSoup('<b>one</b><B>two</B>')
>>> soup.findAll('b')
[<b>one</b>, <b>two</b>]
>>> soup.findAll({'b':True})
[<b>one</b>, <b>two</b>]
>>> 

So I am a little curious.


max



From spamtrap at dot-app.org  Sun Mar 25 06:26:01 2007
From: spamtrap at dot-app.org (Sherm Pendley)
Date: Sun, 25 Mar 2007 06:26:01 -0400
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<1174746081.436526.64360@l75g2000hse.googlegroups.com>
	<pan.2007.03.24.22.59.05@mailinator.com>
	<pan.2007.03.25.03.40.32.158357@REMOVE.THIS.cybersource.com.au>
	<pan.2007.03.25.07.10.22@mailinator.com>
Message-ID: <m2648p7h6u.fsf@local.wv-www.com>

Mark <mark at mailinator.com> writes:

> Of course I realise the modern mantra that "premature optimisation is
> the root of all evil" but I don't subscribe to it.

Note the first word - premature. It's an important distinction, and you've
entirely missed it.

Optimization is premature if you haven't yet ensured that your program is
correct. Worry about getting it right first - and that includes selecting
the appropriate algorithms.

Optimization is premature if you haven't yet profiled your code to identify
precisely *what* code is a bottleneck.

Once you've identified your code's bottleneck(s), and verified that your
algorithm(s) is (are) ideal - then it's time to optimize the implementation
of the algorithm(s), if you still need to. (Most of the time you won't; in
my experience, bottlenecks are the result of badly-chosen algorithms in at
least nine out of ten cases.)

> Programmers have been
> "encouraged" to not give a toss about efficiency

Nonsense. Efficiency is about making the best use of limited resources, and
in most cases the most limited resource is people. Saving $x in hardware
cost by spending $x*10 on programmer salary is not efficient.

> and the outcome is all
> too apparent - most software today looks and runs like a pile of crap.

Most software today is written by comparitive amateurs who use "clever" code
that tries to compensate for badly-chosen algorithms, who guess at where
bottlenecks "might" be instead of profiling their code to see exactly where
they *are*, and who scoff at Knuth's "mantra" because they've misunderstood
what he meant by both "premature" and "optimization".

In other words, premature optimization is quite often the reason why software
often looks and runs like a pile of crap.

sherm--

-- 
Web Hosting by West Virginians, for West Virginians: http://wv-www.net
Cocoa programming in Perl: http://camelbones.sourceforge.net


From victor.lebrun at gmail.com  Fri Mar 30 07:33:54 2007
From: victor.lebrun at gmail.com (vml)
Date: 30 Mar 2007 04:33:54 -0700
Subject: python win32com and dispatchbaseclass
Message-ID: <1175254434.156482.52960@p77g2000hsh.googlegroups.com>

I am a newbie in python and com. I am trying to use python and com to
access to a software.

I had a look in the file .py describing the interface (generated by
makepy) and I found some dispatch base class...

My fisrt question is : is it possible to invoke a com object dispatch
base class?


other question in vb 6 I do something like that :


Public Function GetMyXAxis(idata As foo.idata) As Double()
    Dim Block As foo.IBlock

    Set Block = idata

    GetMyXAxis = Block.XValues
    Set Block = Nothing

End Function


is it possible to do the set Block = idata  in python ?


foo.Iblock is a dispatchbaseclass
foo.idata is a dispatchbaseclass



From nagle at animats.com  Mon Mar 26 22:13:20 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 27 Mar 2007 02:13:20 GMT
Subject: Does Numpy work on QNX 4.25 with Python 2.2?
In-Reply-To: <mailman.5644.1174936561.32031.python-list@python.org>
References: <1174935710.642334.141790@d57g2000hsg.googlegroups.com>
	<mailman.5644.1174936561.32031.python-list@python.org>
Message-ID: <45%Nh.9391$JZ3.5567@newssvr13.news.prodigy.net>

Robert Kern wrote:
> ZMY wrote:
> 
>>I am trying to convert some old Fortran code into Python program and
>>get them work on a QNX 4.25 system. Since the program requires speed,
>>I think using Numpy is really necessary. But I haven't found anything
>>on web about using numpy on QNX 4.25 (especially the for python
>>version 2.2).
> 
> 
> numpy requires Python 2.3+. I haven't heard of anyone trying QNX.

     I've used Python on QNX 6, but QNX 4 is kind of obsolete.

				j.


From enleverlesX.XmcX at XmclaveauX.com  Mon Mar  5 18:17:55 2007
From: enleverlesX.XmcX at XmclaveauX.com (Méta-MCI)
Date: Tue, 6 Mar 2007 00:17:55 +0100
Subject: Graphviz Python Binding for Python 2.5 on Windows?
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
Message-ID: <45eca530$0$27390$ba4acef3@news.orange.fr>

Hi!

You can also use/call GraphViz by COM.
It's run OK with P2.3 - 2.4 & 2.5 

@-salutations
    
Michel Claveau




From bg_ie at yahoo.com  Mon Mar  5 05:22:24 2007
From: bg_ie at yahoo.com (bg_ie at yahoo.com)
Date: 5 Mar 2007 02:22:24 -0800
Subject: Dictionary of Dictionaries
Message-ID: <1173090144.783533.163920@p10g2000cwp.googlegroups.com>

Hi,

I have the following -

messagesReceived = dict.fromkeys(("one","two"), {})

messagesReceived['one']['123'] = 11111
messagesReceived['two']['121'] = 22222
messagesReceived['two']['124'] = 43333

This gives:

{'two': {'121': 22222, '123': 11111, '124': 43333}, 'one': {'121':
22222, '123': 11111, '124': 43333}}

but I expected -

{'one': {'121': 22222, }, 'two': {'123': 11111, '124': 43333}}

What am I doing wrong?

Thanks,

Barry.



From steve at holdenweb.com  Wed Mar 21 12:37:53 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 21 Mar 2007 12:37:53 -0400
Subject: Delete a function
In-Reply-To: <1174494159.024910.151540@l75g2000hse.googlegroups.com>
References: <1174494159.024910.151540@l75g2000hse.googlegroups.com>
Message-ID: <etrn3k$6et$2@sea.gmane.org>

gtb wrote:
> After a function has been imported to a shell how may it be deleted so
> that after editing it can reloaded anew?

Use the built-in reload() function to reload the module that defines the 
function.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From facundo at taniquetil.com.ar  Mon Mar  5 10:43:49 2007
From: facundo at taniquetil.com.ar (Facundo Batista)
Date: Mon, 5 Mar 2007 15:43:49 +0000 (UTC)
Subject: timeout in urllib.open()
References: <pan.2007.02.19.09.36.43.889912@hora-obscura.de>
Message-ID: <eshdrk$p9q$1@sea.gmane.org>

Stefan Palme wrote:

> is there a way to modify the time a call of
>
>   urllib.open(...)
>
> waits for an answer from the other side? Have a tool

I'm working on adding a socket_timeout parametero to urllib2.urlopen.

Regards,

-- 
.   Facundo
.
Blog: http://www.taniquetil.com.ar/plog/
PyAr: http://www.python.org/ar/





From steve at holdenweb.com  Wed Mar 14 14:46:30 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 14:46:30 -0400
Subject: war with china? a different approach?
In-Reply-To: <1173897528.354755.36120@n76g2000hsh.googlegroups.com>
References: <45AC73E8.4010504@mustang.org>	<1hs1e5i.1l5vmdx1ih79a7N%peter@DIESPAMMERDIE.dk>	<45acf752.33126625@news-server.houston.rr.com>	<2-OdnVZn--tUhzDYnZ2dnUVZ_q_inZ2d@bresnan.com>	<1hs27ig.1y5o47s3rgkltN%peter@DIESPAMMERDIE.dk>	<5158etF1j0n5aU3@mid.individual.net>	<45ae2bf1.112133906@news-server.houston.rr.com>	<1hs3c73.1yxa7c3q12khkN%peter@DIESPAMMERDIE.dk>	<jgkeegan-3F565A.20305218012007@individual.net>	<1hs61zt.1f267j04r1ur2N%peter@DIESPAMMERDIE.dk>	<jgkeegan-59B29A.21505218012007@individual.net>	<51av2lF1j1dp8U1@mid.individual.net>	<jgkeegan-C9ACA6.05090819012007@individual.net>	<Xns98BD610993FA4Sandman@216.196.97.136>	<jgkeegan-1CFDBB.11465019012007@individual.net>	<45b101c8.82683109@news-server.houston.rr.com>	<1169235241.943262.161690@51g2000cwl.googlegroups.com>	<1173654190.949881.5110@h3g2000cwc.googlegroups.com>
	<1173897528.354755.36120@n76g2000hsh.googlegroups.com>
Message-ID: <45F84306.8050100@holdenweb.com>

stj911 at rock.com wrote:
> On Mar 11, 3:03 pm, rebeccag... at gmail.com wrote:
>> Are you there, cause I don't want to waste my time writing a response
>> to that if you're not there anymore. Please respond w/ a new post if
>> you do check this.
> 
> A lot of us other than the OP would be interested in a good analysis,
> if you have one
> 
... but preferably NOT on a Python list. There are political forums you 
can use to discuss such issues. Kindly use them.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From kyosohma at gmail.com  Sat Mar 24 13:55:18 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 24 Mar 2007 10:55:18 -0700
Subject: Pattern for foo tool <-> API <-> shell|GUI
In-Reply-To: <mailman.5552.1174753928.32031.python-list@python.org>
References: <mailman.5552.1174753928.32031.python-list@python.org>
Message-ID: <1174758918.211398.182560@l75g2000hse.googlegroups.com>

On Mar 24, 10:31 am, Anastasios Hatzis <a... at hatzis.de> wrote:
> I'm looking for a pattern where different client implementations can use the
> same commands of some fictive tool ("foo") by accessing some kind of API.
> Actually I have the need for such pattern for my own tool
> (http://openswarm.sourceforge.net). I already started restructuring my code
> to separate the actual command implementations from the command-line scripts
> (which is optparser-based now) and have some ideas how to proceed. But
> probably there is already a good pattern used for Python-based tools.
>
> In the case that some of you are interested into this topic and my recent
> thoughts, you may want to have a look at the description below. Any comments
> are very much appreciated. Hopefully this list is a good place for discussing
> a pattern, otherwise I would be okay to move this to another place. Thank
> you.
>
> Here we go:
> The tool package itself provides several commands, although not important for
> the pattern itself, here some examples: modifying user-specific preferences,
> creating and changing project settings files, project-related
> code-generation, or combinations of such commands ... later also commands for
> transformation between several XML formats etc. The classes which implement
> these commands are currently in multiple modules, each having a class named
> CmdHandler.
>
> I have some Python scripts (each having a ScriptHandler classes), for use via
> command-line. Each ScriptHandler class is responsible to add all related
> command-line options and process those provided by the user (based on
> optparse library from Python standard lib). The script then calls the
> corresponding command and provide the verified options as parameters.
>
> Due to the nature of the tool under specific conditions the following results
> may come during command execution:
> * successful execution, no interaction
> * critical error, execution cancelled
> * user interaction needed (e.g. prompt user to approve replace existing
> directory (yes/no), prompt user to provide an alternative option)
>
> Command-line interactions work simply with raw_input().
>
> So far this works. Nevertheless, there are some other aspects that could be
> improved, but this is another topic: The tool uses custom exceptions (e.g.
> for critical errors) and logging features (based on logging from Python
> standard lib). Currently no automated tests, but I have to add.
>
> For the next step I plan to support not only my own command-line scripts, but
> also a GUI to access the commands, as well as 3rd-party products (themselves
> command-line scripts or GUIs, such as foo plugins for any 3rd-party-tools). As
> far as I see, these clients need to implement a handler that:
> (1) Collecting all required parameters and optional parameters from a user
> (2) Provide these parameters for a particular call to command API
> (3) Provides some kind of hooks that are called back from the API on specific
> events, e.g. Question with user-choice; Information with user-input
> (4) Provide a logging handler object from the tool logging
> class or a sub-class of that in the case that a client-specific logging object
> should be triggered on each debug, message, warning etc.
>
> (1) is very client-specific, e.g. in a GUI via dialogs.
>
> (2) Each command provides a signature for all required/optional parameters.
> They are all verified from the command itself, although a client could do
> some verification at the first place.
>
> (3) Example use-case: a command needs to know if the user wants the command to
> proceed with a particular action, e.g. "Do you want to delete bar.txt?"
> with "Yes", "No" and "Cancel" choice. So the client's handler object (which
> is provided as first parameter to each command) implements client-specific
> features to show the user this question (e.g. pop-up dialog with question and
> three buttons), receive the user input (clicking one of the buttons) and pass
> this choice back to the foo API. Alternatively some kind of text information
> could be required, as in raw_input(), so actually this probably would be two
> different interaction features to be implemented.
>
> (4) The foo API also provides a logging class. The client needs to initialize
> such an object and provide it as member of the handler object provided to the
> API. I wonder if some clients may have own logging features and want to
> include all log messages from foo tool to the own logs. In this case a client
> could its own sub-class of the foo logging class and extending it with
> callbacks to its (client-)native logging object.
>
> What do you think about this?
>
> Best regards,
> Anastasios

I think if you want to use a GUI, wxpython or Tkinter would work well
for you. wxPython has more widgets from the start, but is also more
complex. Tkinter is good for quick and dirty GUIs, but gets
increasingly more complicated to deal with the more complex the GUI
has to be, in general. At least, that's what I am told.

I started out using Tkinter. It's great for prototyping, but I had to
port VBA code to a Python GUI and Tkinter just didn't have the widgets
I needed (including the the submodules PMW and Tix). So I went with
wxPython. I personally like it quite a bit. Plus you can use XRC with
wxPython to help separate out the GUI code from the logic.

Both toolkits can accept user input in myriads of ways and both have
standard dialogs that look almost or exactly native to the OS they are
running on. Download wxPython's demo to see all that it can do.
Tkinter is already installed and it has demos in its subdirectory
under Python.

There's my 2 cents.

Mike



From n00m at narod.ru  Sun Mar 18 01:35:09 2007
From: n00m at narod.ru (n00m)
Date: 17 Mar 2007 22:35:09 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174190073.112097.29160@l75g2000hse.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
	<1174158002.730076.22720@y80g2000hsf.googlegroups.com>
	<1174166115.263201.51840@d57g2000hsg.googlegroups.com>
	<1174189566.189546.85510@y80g2000hsf.googlegroups.com>
	<1174190073.112097.29160@l75g2000hse.googlegroups.com>
Message-ID: <1174196109.489233.182960@l75g2000hse.googlegroups.com>

>>> ================================ RESTART ===
>>>
0
30.4740708665 secs (Anton Vredegoor)
>>> ================================ RESTART ===
>>>
0
30.4132625795 secs (Anton Vredegoor)
>>> ================================ RESTART ===
>>>
0
30.4812175849 secs (Anton Vredegoor)
>>>


+++++++++++++++++++++++++++++++++++++++++++++++++++++++
import psyco, time

def freq(L):
      D = {}
      for x in L:
          D[x] = D.get(x,0)+1
      return D

def test():
     f = file('D:/m4000.txt')
     f.readline()
     L = []
     for line in f:
         L.append(map(int,line.split()))

     q,w,e,r = map(freq,zip(*L))
     sch,h = 0,{}
     for xk,xv in q.iteritems():
       for yk,yv in w.iteritems():
         if h.has_key(xk+yk):
           h[xk+yk] += xv*yv
         else:
           h[xk+yk] = xv*yv

     for xk,xv in e.iteritems():
       for yk,yv in r.iteritems():
         if h.has_key(-(xk+yk)):
           sch += h[-(xk+yk)]*xv*yv

     print sch

t = time.clock()
psyco.full()
test()
print time.clock() - t,"secs (Anton Vredegoor)"
+++++++++++++++++++++++++++++++++++++++++++++++++++++++

PS
The same PC: AMD Sempron +2600 (1.6 GHz); 512 MB RAM.



From lbates at websafe.com  Tue Mar  6 09:56:04 2007
From: lbates at websafe.com (Larry Bates)
Date: Tue, 06 Mar 2007 08:56:04 -0600
Subject: Interface Implementation in Python
In-Reply-To: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
Message-ID: <KNadnUBRWe-dHHDYnZ2dnUVZ_rOqnZ2d@comcast.com>

p_shakil at yahoo.com wrote:
> Hi,
> 
>  I would like to know the interface concept in Python.How the
> Interface is defined and implemented in Python?.
> 
> How to access the interface fromn Client?
> 
> Thanks
> PSB
> 
You might want to look at how Zope 3 implements interfaces.

http://wiki.zope.org/zope3/FrontPage
http://wiki.zope.org/zope3/programmers_tutorial.pdf

-Larry


From tiedon_jano at hotmail.com  Thu Mar  1 10:29:15 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Thu, 01 Mar 2007 15:29:15 GMT
Subject: How to Read Bytes from a file
In-Reply-To: <1172757183.819978.219440@v33g2000cwv.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1172757183.819978.219440@v33g2000cwv.googlegroups.com>
Message-ID: <fjCFh.152$HB5.86@read3.inet.fi>

Bart Ogryczak kirjoitti:
> On Mar 1, 7:52 am, "gregpin... at gmail.com" <gregpin... at gmail.com>
> wrote:
>> It seems like this would be easy but I'm drawing a blank.
>>
>> What I want to do is be able to open any file in binary mode, and read
>> in one byte (8 bits) at a time and then count the number of 1 bits in
>> that byte.
>>
>> I got as far as this but it is giving me strings and I'm not sure how
>> to accurately get to the byte/bit level.
>>
>> f1=file('somefile','rb')
>> while 1:
>>     abyte=f1.read(1)
> 
> import struct
> buf = open('somefile','rb').read()
> count1 = lambda x: (x&1)+(x&2>0)+(x&4>0)+(x&8>0)+(x&16>0)+(x&32>0)+
> (x&64>0)+(x&128>0)
> byteOnes = map(count1,struct.unpack('B'*len(buf),buf))
> 
> byteOnes[n] is number is number of ones in byte n.
> 
> 
> 

I guess struct.unpack is not necessary, because:

	byteOnes2 = map(count1, (ord(ch) for ch in buf))

seems to do the trick also.

Cheers,
Jussi


From mike.klaas at gmail.com  Mon Mar 26 21:20:44 2007
From: mike.klaas at gmail.com (Klaas)
Date: 26 Mar 2007 18:20:44 -0700
Subject: with timeout(...):
In-Reply-To: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
Message-ID: <1174958444.273725.15710@o5g2000hsb.googlegroups.com>

On Mar 26, 3:30 am, Nick Craig-Wood <n... at craig-wood.com> wrote:
> Did anyone write a contextmanager implementing a timeout for
> python2.5?
>
> I'd love to be able to write something like
>
>     with timeout(5.0) as exceeded:
>         some_long_running_stuff()
>     if exceeded:
>         print "Oops - took too long!"
>
> And have it work reliably and in a cross platform way!

Doubt it.  But you could try:

class TimeoutException(BaseException):
   pass

class timeout(object):
   def __init__(self, limit_t):
       self.limit_t = limit
       self.timer = None
       self.timed_out = False
   def __nonzero__(self):
       return self.timed_out
   def __enter__(self):
       self.timer = threading.Timer(self.limit_t, ...)
       self.timer.start()
       return self
   def __exit__(self, exc_c, exc, tb):
       if exc_c is TimeoutException:
          self.timed_out = True
          return True # suppress exception
       return False # raise exception (maybe)

where '...' is a ctypes call to raise the given exception in the
current thread (the capi call PyThreadState_SetAsyncExc)

Definitely not fool-proof, as it relies on thread switching.  Also,
lock acquisition can't be interrupted, anyway.  Also, this style of
programming is rather unsafe.

But I bet it would work frequently.

-Mike



From anton.vredegoor at gmail.com  Sat Mar 10 18:59:28 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sun, 11 Mar 2007 00:59:28 +0100
Subject: number generator
In-Reply-To: <esvepk$1cu$1@news3.zwoll1.ov.home.nl>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><7x7itqqxlh.fsf@ruckus.brouhaha.com><1173453432.893222.308610@j27g2000cwj.googlegroups.com><pan.2007.03.09.15.32.01.112493@gmx.net><1173515984.515050.27400@n33g2000cwc.googlegroups.com>	<esukru$1v1$1@news2.zwoll1.ov.home.nl>
	<mailman.4919.1173560418.32031.python-list@python.org>
	<esvepk$1cu$1@news3.zwoll1.ov.home.nl>
Message-ID: <esvgme$1cu$2@news3.zwoll1.ov.home.nl>

Anton Vredegoor wrote:

 > L = [1] * (bins-1) + [0] * (bins-1)

replace these lines in the code by:

L = [1] * (bins-1) + [0] * (bricks-bins)

A.


From has.temp3 at virgin.net  Sun Mar 25 07:08:38 2007
From: has.temp3 at virgin.net (has)
Date: 25 Mar 2007 04:08:38 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <1174820918.565521.44750@p15g2000hsd.googlegroups.com>

On 24 Mar, 18:30, "Robert Hicks" <sigz... at gmail.com> wrote:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.

To repeat what others have said: don't uninstall existing
Python.framework builds. Frameworks support multiple versions quite
happily, and removing them is more hassle than it's worth. Just
install the official framework build from python.org (http://
www.python.org/ftp/python/2.5/python-2.5-macosx.dmg), which should
also update your shell profiles as necessary.

HTH

has
--
http://appscript.sourceforge.net
http://rb-appscript.rubyforge.org
http://appscript.sourceforge.net/objc-appscript.html



From nobody at invalid.com  Fri Mar 23 12:34:30 2007
From: nobody at invalid.com (Erik Johnson)
Date: Fri, 23 Mar 2007 10:34:30 -0600
Subject: Been a while...
References: <4602a1be$0$32400$c3e8da3@news.astraweb.com>
	<etvg65$bdp$3@daisy.noc.ucla.edu>
Message-ID: <4604018f@nntp.zianet.com>


"James Stroud" <jstroud at mbi.ucla.edu> wrote in message
news:etvg65$bdp$3 at daisy.noc.ucla.edu...

> Hawk this list and try to pick off easy answers before anyone else.
> That's what I do. The pressure is to be right, because if you're not,
> you hear about it in a hurry.

    That is actually an excellent suggestion.  Even if you can't answer a
question, finding interesting and comprehanesible questions and then
studying the various follow up posts is an excellent way to sharpen your
Python skills, and broaden your knowledge about not only Python syntax and
common pitfalls but about what modules are typically applied to various
kinds of problems.

-ej




From shahmed at sfwmd.gov  Thu Mar  1 14:58:11 2007
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Thu, 1 Mar 2007 14:58:11 -0500
Subject: GIS Shape file upload to FTP server
Message-ID: <14A2A120D369B6469BB154B2D2DC34D206F1EC12@EXCHVS01.ad.sfwmd.gov>

HI Group,

As I am very new in python field so this question might be very silly to
you but if I get any help is highly appreciated.

Problem: 

I wrote a python script which is working fine to upload files to the ftp
server but the problem is it is reducing the actual size after
transferring. I need to upload a GIS Shape file to the ftp server but
want to keep the same size and format. Any idea or help is highly
appreciated.

 
Thanks

Shakir
Staff Geographer
Sfwmd.gov

The code is as follows: 

===================================
# Import system modules

 

import os
import sys 
import win32com.client
import zipfile
import os.path
import ftplib
from ftplib import FTP


ftp=ftplib.FTP("ftp.sfwmd.gov","","")  
ftp.login('sahmed','sa1lf1sh')
#ftp.cwd("/export/pub/sahmed")
ffile = open('c:/test/wuppnt.shp', 'r')

ftp.storbinary("STOR wuppnt.shp", ffile)
ffile.close()

print "OK"
ftp.quit()


From collinstocks at gmail.com  Tue Mar  6 23:40:06 2007
From: collinstocks at gmail.com (Collin Stocks)
Date: Tue, 6 Mar 2007 23:40:06 -0500
Subject: Direct memory access
Message-ID: <4c0048df0703062040m15e310f2qe3b91f5499fbc07e@mail.gmail.com>

Does anyone know how to directly handle memory using python?
I want to be able, for example, to copy the actual contents of a memory
address, or set the actual contents of a memory address.
Here is an example of what I would like to be able to do:

>>> num=12
>>> addr=id(num)
>>> contents=<getMemory function>(hex(addr)).read(2)
>>> contents
"0b"
>>> <getMemory function>(hex(addr),"w").write("0e")
>>> num
15

In that example, I was assuming that the function would return a file like
object: it doesn't have to. Any type of function would be fine.
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From codecraig at gmail.com  Tue Mar 20 06:40:53 2007
From: codecraig at gmail.com (abcd)
Date: 20 Mar 2007 03:40:53 -0700
Subject: Load three different modules which have the same name
In-Reply-To: <mailman.5300.1174338208.32031.python-list@python.org>
References: <1174329389.488531.270010@p15g2000hsd.googlegroups.com>
	<1174329764.310542.298430@b75g2000hsg.googlegroups.com>
	<mailman.5300.1174338208.32031.python-list@python.org>
Message-ID: <1174387253.412138.124830@d57g2000hsg.googlegroups.com>

> Blerch! Why not just call the modules by the right names in the first
> place? Then each will have its own sys.modules entry for a start ...
>
> regards
>   Steve

what do i need to do?  also, is there a way I can load each one as I
have but each one have its own unique entry in sys.modules?  For
example i could load Person from Person (in alpha) as, "Person_Alpha"
or something like that in sys.modules?  not sure how I might do that.

Thanks!



From mcPas.De.Spam at mclaveauPas.De.Spam.com  Fri Mar 16 18:36:36 2007
From: mcPas.De.Spam at mclaveauPas.De.Spam.com (Michel Claveau)
Date: Fri, 16 Mar 2007 23:36:36 +0100
Subject: Executing a list of functions
References: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
Message-ID: <mn.85887d73b5057762.34209@mclaveauPas.De.Spam.com>

Hi!

Your code run OK for me.

But, if you want "time-lag" (sorry for my english) execution, you can 
try this:


def a():
    print "this is a"

def b():
    print "this is b"

lst = [a, b]
[f() for f in lst]







-- 
@-salutations

Michel Claveau




From noway at ask.me  Sat Mar 17 22:08:03 2007
From: noway at ask.me (Giovanni Bajo)
Date: Sun, 18 Mar 2007 03:08:03 +0100
Subject: [ANN] GCC 4.1.2 installer for Python distutils compilation
Message-ID: <mailman.5240.1174195220.32031.python-announce-list@python.org>

Hello,

This page:
   http://www.develer.com/oss/GccWinBinaries

contains a friendly Windows installer for GCC 4.1.2 (MinGW binary version), 
with full support for integrating it with Python installations so that it is 
used by distutils to compile Python extensions.


Direct download link:
   http://www.develer.com/~rasky/gcc-4.1.2-mingw-setup.exe


Who needs this package?

  * People who wants to use FLOSS tools to develop Python extensions.
  * People who wants to use the recent GCC 4.1.2 to develop Python extensions, 
given that it easily outperforms the 4-years-old Visual Studio .NET 2003.


What's special about this?

  * mingw.org still has GCC 3.4.2, so go figure. Also, you need to compose 
other packages together. This is a single installer with everything inside.
  * By default, MinGW GCC links with MSVCRT.DLL, and not MSVCR71.DLL (used by 
Python 2.4 and 2.5). Fixing this is pretty complicate, and there's much 
confusion (Google turns up red herrings). This package handles everything for 
you, and it just works.

-- 
Giovanni Bajo
Develer S.r.l.
http://www.develer.com


From AWasilenko at gmail.com  Thu Mar 22 23:59:52 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 22 Mar 2007 20:59:52 -0700
Subject: Printing from a text file quirk
In-Reply-To: <1174622009.182242.64160@n59g2000hsh.googlegroups.com>
References: <1174620861.374740.203670@l75g2000hse.googlegroups.com>
	<1174622009.182242.64160@n59g2000hsh.googlegroups.com>
Message-ID: <1174622392.007734.187340@l77g2000hsb.googlegroups.com>

> Where can I see that?  From the python language documentation here:
>
> http://docs.python.org/lib/lib.html
>
> you can look up readline() and see:
> ----------
> readline(       [size])
> Read one entire line from the file. A trailing newline character is
> kept in the string
> ---------
>
> There is a function called strip() that will strip off all leading and
> trailing whitespace on a string, e.g. a newline.- Hide quoted text -
>
> - Show quoted text -

Thank you!  Just what I needed :)



From g.brandl at gmx.net  Wed Mar 28 13:52:46 2007
From: g.brandl at gmx.net (Georg Brandl)
Date: Wed, 28 Mar 2007 19:52:46 +0200
Subject: very strange syntax errors
In-Reply-To: <eue8hl$uds$02$1@news.t-online.com>
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
	<eue8hl$uds$02$1@news.t-online.com>
Message-ID: <euea1e$gd3$1@sea.gmane.org>

Peter Otten schrieb:
> hg wrote:
> 
>> I'v been facing some very strange errors lately:
>> 
>> one example:
>> 
>> def __init__(self):
>> ....
>>         import my_info
>>         some_text = my_info.T_SOME_TEXT
>>                                       ^ syntax error
>> 
>> 
>> I manage to get rid of that one by moving the import on top of my file.
>> 
>> Note: Python 2.4.1 under Windows
>> 
>> 
>> Any clue ?
> 
> A guess: you may have mixed Unix ("\n") and Windows ("\r\n") newlines. Try
> to ensure that every line ends with "\r\n".

That shouldn't be a problem since Python reads source files in universal
newline mode.

Georg



From john.pye at gmail.com  Fri Mar 23 00:47:22 2007
From: john.pye at gmail.com (John Pye)
Date: 22 Mar 2007 21:47:22 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5496.1174624444.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
	<mailman.5496.1174624444.32031.python-list@python.org>
Message-ID: <1174625242.761663.235320@e1g2000hsg.googlegroups.com>

On Mar 23, 3:33 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> import msvcrt
> fh = msvcrt.get_osfhandle(f.fileno())
..
> example.filetest(fh)
> f.close()

Cool, that looks great, Gabriel.

But is there any way I can hide the get_osfhandle call inside my
Python module? That way I wouldn't need to request end users to make
contorted 'if platform.system()=="Windows"' calls everywhere.

Maybe this *is* workable, after all :-)



From fred at adventistcare.org  Mon Mar 19 14:52:11 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Mon, 19 Mar 2007 14:52:11 -0400
Subject: Choosing Python
Message-ID: <BB295D7C21C5344E94A3EEBA9089BD940326BB@accmail2.sunbelt.org>

glad to hear it.  Those of us who would like to introduce it in reluctant
schools elsewhere could benefit from a post-semester evaluation, including
student comments and some sample, running projects.  

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of adaworks at sbcglobal.net
Sent: Sunday, March 18, 2007 9:22 PM
To: python-list at python.org
Subject: Choosing Python


The choice is made.   The school where I teach has finally
made its decision to teach Python first.    For several years,
we have been teaching Java first, and before that, C++.

I introduced Python in one of my courses and got a lot of
flak from some of the other faculty.  I also introduced Ruby,
and got even more flak.   In my course, the students loved
Python for its simplicity, its power, and its flexibility.

It is clear that Python is not the ultimate, one-size-fits-all
language.  No language is.  However, for a beginner's
language it is nearly ideal.   Further, it is a great language
for a wide range of serious programming problems.

For large-scale, safety-critical software, I still prefer Eiffel
or Ada.   Java could vanish tomorrow and, with Python
and Ruby available, no one would miss Java at all.  As for
C++, for any serious software systems, it should always be
the language of last resort.   C++, as an object-oriented
assembler, is pretty much its own virus.

Already, students are turning in really good projects in Python,
and some in Ruby.   Not all the professors are on-board with
this decision, but in time I think they will be.

Richard Riehle 


-- 
http://mail.python.org/mailman/listinfo/python-list



From jmcmonagle at velseis.com.au  Mon Mar 26 18:41:14 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Tue, 27 Mar 2007 08:41:14 +1000
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174926951.133085.294900@l75g2000hse.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
	<1174926951.133085.294900@l75g2000hse.googlegroups.com>
Message-ID: <46084C0A.1040905@velseis.com.au>

jp wrote:

>>> On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>>>> I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
>>>> I skip over these widgets when using the tab key?
>>>> Thank you,
>>>> John

What version of Pmw are you using ?  Tabbing between widgets works fine 
on my system (Pmw 1.2,  tk 8.4, KDE)

I can change the focus behaviour by using the takefocus option.  You 
were on the right track, you just did it wrong (see code below):

########################################################################
from Tkinter import *
import Pmw

root = Tk()
entry = Pmw.EntryField(root, labelpos=W, value="", label_text='Name:')
entry.grid(row=1)
entry.component('entry').configure(takefocus=0)

Button(root,text='test1').grid(row=2)
Button(root,text='test2').grid(row=3)
Button(root,text='test3').grid(row=4)

root.mainloop()
#########################################################################

Regards,

John


From sean_mcilroy at yahoo.com  Fri Mar  9 16:00:24 2007
From: sean_mcilroy at yahoo.com (Sean McIlroy)
Date: 9 Mar 2007 13:00:24 -0800
Subject: is this a bug? (python 2.3)
In-Reply-To: <mailman.4871.1173473004.32031.python-list@python.org>
References: <1173472337.094165.65510@8g2000cwh.googlegroups.com>
	<mailman.4871.1173473004.32031.python-list@python.org>
Message-ID: <1173474024.719536.127210@8g2000cwh.googlegroups.com>

thanks




From paul at boddie.org.uk  Mon Mar  5 05:53:59 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 5 Mar 2007 02:53:59 -0800
Subject: Python Source Code Beautifier
In-Reply-To: <rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
Message-ID: <1173092039.630900.129730@j27g2000cwj.googlegroups.com>

On 2 Mar, 14:45, Alan Franzoni <alan.franzoni_inva... at geemail.invalid>
wrote:
>
> I mean... I don't like that. I'm not really a Python expert, I found this
> behaviour is documented in the language reference itself:
>
> http://docs.python.org/ref/augassign.html
>
> But... I don't know, still think it's confusing and not going to use it.

One way to think of it is this:

a += b

...is more or less the same as...

if hasattr(a, "__iadd__"):
    a = a.__iadd__(b)
else:
    a = a + b

Since __iadd__ might mutate an object, returning the same object, it's
possible to say that the name "a" still points to the same object in
such circumstances using the above scheme. Whether any rebinding or
resetting of "a" actually takes place in such a situation (in CPython)
might be considered an issue of optimisation, but I suppose augmented
assignments with attributes might bring out some semantic differences,
too, as can be seen by the note about class attributes at the end of
the referenced section of the manual.

Paul



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 17:55:16 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 09:55:16 +1100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
Message-ID: <pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>

On Sat, 03 Mar 2007 15:56:39 -0500, Nicholas Parsons wrote:

> 
> On Mar 3, 2007, at 3:49 PM, Paul Rubin wrote:
> 
>> Nicholas Parsons <parsons.nicholas1 at gmail.com> writes:
>>> I was just playing around in IDLE at the interactive prompt and typed
>>> in dir({}) for the fun of it.  I was quite surprised to see a pop
>>> method defined there.  I mean is that a misnomer or what?  From the
>>> literature, pop is supposed to be an operation defined for a stack
>>> data structure.  A stack is defined to be an "ordered" list data
>>> structure.  Dictionaries in Python have no order but are sequences.
>>> Now, does anyone know why the python core has this pop method
>>> implemented for a dictionary type?
>>
>> Try typing:
>>
>>   help({}.pop)
>> --  
>> http://mail.python.org/mailman/listinfo/python-list
> 
> Thanks, that gives a more details explanation of what the behavior is  
> but doesn't answer my question above :(

Just because pop can be defined for an ordered stack doesn't mean pop
can't be generalized to other data types too.

I personally don't see that pop has any advantage, especially since the
most useful example

while some_dict:
    do_something_with(some_dict.pop()) 

doesn't work. Instead you have to write this:

for key in some_dict.keys(): 
    # can't iterate over the dictionary directly!
    do_something_with(some_dict.pop(key))

which is hardly any saving over:

for key in some_dict.keys(): 
    # can't iterate over the dictionary directly!
    do_something_with(some_dict[key])
    del some_dict[key]


To my mind, having to supply a key to dict.pop makes it rather pointless.


-- 
Steven.



From sigzero at gmail.com  Sun Mar 25 15:02:31 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 25 Mar 2007 12:02:31 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <mailman.5575.1174795240.32031.python-list@python.org>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5575.1174795240.32031.python-list@python.org>
Message-ID: <1174849351.653043.316600@p77g2000hsh.googlegroups.com>

On Mar 24, 11:53 pm, "js " <ebgs... at gmail.com> wrote:
> The only way you can do is rermove python2.4.4's files manually.
>
> I suggest you to use MacPorts or Fink.
>
> With MacPort, you can uninstall python2.4 by doing
> $ port uninstall python24
>
> And Installation is
> $ port install python25
>

I try to like MacPorts but sometimes they don't do dependecies very
well. For instance, I have a newer version of Ruby installed and I
wanted to update a module through MP and it lists Perl5.8 as a
dependency and tries to install it. On Tiger, Perl is already at 5.8
so what the hey! It isn't the first time I have been hit with that
either.

Robert



From exarkun at divmod.com  Sat Mar 10 11:00:15 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 10 Mar 2007 11:00:15 -0500
Subject: Database module & multithreading
In-Reply-To: <1173541223.545628.29650@64g2000cwx.googlegroups.com>
Message-ID: <20070310160015.18920.399990282.divmod.quotient.404@ohm>

On 10 Mar 2007 07:40:23 -0800, jupiter <anil.jupiter9 at gmail.com> wrote:
>On Mar 10, 8:16 pm, Michael Bentley <rmc... at gmail.com> wrote:
>> > Thanx for this pointer buddy! I have done my homework. Some Database
>> > modules are not actively maintained some modules  does not work with
>> > Python 2.5. At this moment I am using Sqlite3 which is pretty fast but
>> > it dosent allow me to use multi threading so which database module is
>> > better in terms of multithreading
>>
>> Actually, I think sqlite3 just requires that each thread have its own
>> connection and cursor.
>
>Exception in thread Thread-2:
>Traceback (most recent call last):
>  File "D:\Python25\lib\threading.py", line 460, in __bootstrap
>    self.run()
>  File "url_part1.py", line 161, in run
>    dbacc(self.o, self.dbase).dataenter()
>  File "url_part1.py", line 64, in dataenter
>    self.c.execute('insert into '+self.odbase+' values
>(?,?,?,?,?,?,?,?,?,?,?,?,
>?)',self.odata)
>InterfaceError: Error binding parameter 3 - probably unsupported type.
>
>this is the error I am getting................
>

Do you recognize that this has absolutely nothing to do with threading?  If
this is the reason you want to switch away from SQLite3, reconsider, because
it's just a bug in your application code, and no matter what database or
adapter you use, bugs in your application code will prevent your application
from working properly.

Jean-Paul


From http  Tue Mar  6 15:27:20 2007
From: http (Paul Rubin)
Date: 06 Mar 2007 12:27:20 -0800
Subject: This web site creates a *popup window* => how fetch contents in a
	script?
References: <1173161903.046347.192300@j27g2000cwj.googlegroups.com>
	<mailman.4703.1173163158.32031.python-list@python.org>
	<1173211320.042518.121890@8g2000cwh.googlegroups.com>
Message-ID: <7x649e2k47.fsf@ruckus.brouhaha.com>

"seberino at spawar.navy.mil" <seberino at spawar.navy.mil> writes:
> Sure I can grab the aforementioned URL's contents but what about the
> NEW contents in the NEW popup window that appears AFTER you press some
> form buttons?  How grab *that* ?

Usually it's from some fixed url with possibly some query parameters.
Just figure out the url from your "Properties" in your browser, or by
studying the javascript that popped up the window.  There are various
ways the popup sites can make this difficult but it's rare for them
to bother.  



From psdasilvaX at esotericaX.ptX  Fri Mar  9 19:25:24 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sat, 10 Mar 2007 00:25:24 +0000
Subject: bisect on a list of lists
In-Reply-To: <mailman.4874.1173477506.32031.python-list@python.org>
References: <1173471342.957772@iceman.esoterica.pt>
	<mailman.4874.1173477506.32031.python-list@python.org>
Message-ID: <1173486322.393479@iceman.esoterica.pt>

Gabriel Genellina escreveu:
> En Fri, 09 Mar 2007 17:15:44 -0300, Paulo da Silva
> <psdasilvaX at esotericaX.ptX> escribi?:
...

> 
> lists *are* classes (at least since Python 2.2)
> Inherit from the builtin list, redefine __cmp__(self, other) as
...

Thanks Gabriel. This sounds very nice for my purpose.
I have some doubts however. How do I "transform" a list into
MyList? Is this the best way?

class MyList(list):
	def __init__(self,l=None):
		if l != None:
			self=copy(l) (or self.extend(l) - this does not need copy module)

Then I can do something like xl=MyList([ ... ])

I read the description of __new__ but I didn't fully understand it and
didn't find any examples on how it is used.
Is it usable in this context? How?

Thanks
Paulo


From tjreedy at udel.edu  Fri Mar  9 00:46:48 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 Mar 2007 00:46:48 -0500
Subject: any better code to initalize a list of lists?
References: <esqc9r$cn09$1@netnews.upenn.edu><7xlki7dx5m.fsf@ruckus.brouhaha.com><esqfea$cne0$1@netnews.upenn.edu>
	<7xps7j6tct.fsf@ruckus.brouhaha.com>
Message-ID: <esqsc7$j1t$1@sea.gmane.org>


"Paul Rubin" <"http://phr.cx"@NOSPAM.invalid> wrote in message 
news:7xps7j6tct.fsf at ruckus.brouhaha.com...
| "John" <rds1226 at sh163.net> writes:
| > I want to radix sort non-negative integers that can fit into 32-bits.
|
| But why do you want to do that?  Why not just use Python's built-in
| sorting operation?

Perhaps to learn or teach about the algorithm.  Python is good for that. 





From good_online_jobs at yahoo.com  Sat Mar 17 20:49:12 2007
From: good_online_jobs at yahoo.com (good_online_jobs)
Date: 17 Mar 2007 17:49:12 -0700
Subject: Looking for a job?
Message-ID: <1174178952.468377.42690@l75g2000hse.googlegroups.com>

Free. Find a Job here now--> http://www.jobbankdata.com



From tom.rectenwald at eglow.net  Mon Mar 19 11:33:47 2007
From: tom.rectenwald at eglow.net (tereglow)
Date: 19 Mar 2007 08:33:47 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <etki94$7qq$1@panix3.panix.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<1huzlrm.1scmekr1val8sbN%aleax@mac.com>
	<1174255846.721961.108370@e1g2000hsg.googlegroups.com>
	<etki94$7qq$1@panix3.panix.com>
Message-ID: <1174318427.136236.104310@p15g2000hsd.googlegroups.com>

On Mar 18, 7:33 pm, a... at pythoncraft.com (Aahz) wrote:
> In article <1174255846.721961.108... at e1g2000hsg.googlegroups.com>,
>
>
>
>
>
> tereglow <tom.rectenw... at eglow.net> wrote:
> >On Mar 15, 1:47 am, a... at mac.com (Alex Martelli) wrote:
> >> tereglow <tom.rectenw... at eglow.net> wrote:
>
> >>>grep^MemTotal /proc/meminfo | awk '{print $2}'
>
> >> If you would indeed do that, maybe it's also worth learning something
> >> more about the capabilities of your "existing" tools, since
>
> >>   awk '/^MemTotal/ {print $2}' /proc/meminfo
>
> >> is a more compact and faster way to perform exactly the same task.
>
> >> (You already received a ton of good responses about doing this in
> >> Python, but the "pipegrepinto awk instead of USING awk properly in the
> >> first place!" issue has been a pet peeve of mine for almost 30 years
> >> now, and you know what they say about old dogs + new tricks!-).
>
> >I had no idea you could do that.  Thanks for the tip, I need to start
> >reading that awk/sed book collecting dust on my shelf!
>
> Your other option is to completely abandon awk/sed.  I started writing
> stuff like this in Turbo Pascal back in the early 80s because there
> simply wasn't anything like awk/sed available for CP/M.  In the 90s, when
> I needed to do similar things, I used Perl.  Now I use Python.
>
> From my POV, there is really no reason to learn the advanced shell
> utilities.
> --
> Aahz (a... at pythoncraft.com)           <*>        http://www.pythoncraft.com/
>
> "Typing is cheap.  Thinking is expensive."  --Roy Smith- Hide quoted text -
>
> - Show quoted text -

Well, my goal is to become proficient enough at Python, that I can
replace most shell functionality with it.  I was partially successful
when learning Perl.  The trouble is that I started with shell, awk/sed/
grep, that sort of stuff.  It is somewhat difficult to break free of
"shell" like thinking and programming when you have created habits of
coding in that style.  I've recently started to work with an
application (HP Application Mapping) that has an awful lot of Jython
code running in the background; so that project sort of inspired me to
start really digging into Python; to gain a better understanding of
the application, and for any added benefit; especially in regards to
automating systems administration.  Am really enjoying learning it,
though it hurts the head a bit, trying to re-train myself.  Things
take time though, I'm not giving up!



From no at spam.fr  Thu Mar 22 13:26:43 2007
From: no at spam.fr (ian)
Date: Thu, 22 Mar 2007 18:26:43 +0100
Subject: Problem with time
Message-ID: <4602bc27$0$9709$426a74cc@news.free.fr>

Hi,

i have a problem with time in python.

1) i got 2 values from mysql db (fields are "time" type)
2) python get it as "<type 'datetime.timedelta'>" (why timedelta???)
3) i need to compare 2 fields with actual time ... EG:
if ArrOutputsAuto[i].TimeFrom >= GNow and ArrOutputsAuto[i].TimeTo <= GNow:

i need actual time, and 2 fields from DB in datetime.time type (correct me
if i'm wrong) so i can do my test "if time>= ..."

I think i can grab time from DB in string and parse it in
datetime.time(x,x,x) but its not very optimized

Any idea ?

Thanks




From jnews at julius-net.net  Thu Mar  8 12:47:03 2007
From: jnews at julius-net.net (Matthias Julius)
Date: Thu, 08 Mar 2007 12:47:03 -0500
Subject: Is numeric keys of Python's dictionary automatically sorted?
References: <esn6nu$c8nt$1@netnews.upenn.edu>
Message-ID: <87odn339wo.fsf@julius-net.net>

"John" <rds1226 at sh163.net> writes:

> I am coding a radix sort in python and I think that Python's dictionary may 
> be a choice for bucket.
>
> The only problem is that dictionary is a mapping without order. But I just 
> found that if the keys are numeric, the keys themselves are ordered in the 
> dictionary.
>
> part of my code is like this:
> radix={}
>     for i in range(256):
>         radix[i]=[]

I wonder why nobody has suggested the use of a list:

redix = [[] for i in range(256)]

Matthias


From laurent.pointal at limsi.fr  Wed Mar  7 11:15:33 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 07 Mar 2007 17:15:33 +0100
Subject: Generator expression parenthesis mixed with function call ones
In-Reply-To: <mailman.4756.1173283788.32031.python-list@python.org>
References: <esmn5q$5ni$1@news2.u-psud.fr>
	<mailman.4756.1173283788.32031.python-list@python.org>
Message-ID: <esmoeq$6b5$1@news2.u-psud.fr>

Facundo Batista a ?crit :
> Laurent Pointal wrote:
> 
> 
>>>>> f(4,i for i in range(10))
>>   File "<stdin>", line 1
>> SyntaxError: invalid syntax
>>
>>
>> Why does Python allow generator expression parenthesis to be mixed with
>> function call parenthesis when there is only one parameter ?
> 
> For simplicity and elegant coding, so you can do something like you did
> at first:
> 
>   sum(i for i in range(10))

How a Python beginner know that he is using a generator and not a
list-comprehension ?

>> IMHO this should be forbidden, usage must not be different when there is
>> only one parameter and when there are more parameters.
> 
> The problem in your last test is that if you use more than one argument,
> you *must* use the parenthesis. In Py2.5 there's a better message error:
> 
>>>> f(4,i for i in range(10))
>   File "<stdin>", line 1
> SyntaxError: Generator expression must be parenthesized if not sole argument
> 
> 
> The correct way to do that is:
> 
>>>> f(4,(i for i in range(10)))
> 4 (<generator object at 0xb7dab56c>,)

Thanks, I know. My example is just to show a point I consider to be
non-coherent (different processing if there is one argument or more than
one).

A+

Laurent.



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 19:02:40 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 11:02:40 +1100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
	<CqnGh.6368$re4.4381@newssvr12.news.prodigy.net>
	<7xy7mdsxw1.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2007.03.04.00.02.39.381620@REMOVE.THIS.cybersource.com.au>

On Sat, 03 Mar 2007 15:36:14 -0800, Paul Rubin wrote:

> James Stroud <jstroud at mbi.ucla.edu> writes:
>> for akey in dict1:
>>    if some_condition(akey):
>>      dict2[akey] = dict2.pop(akey)
>> 
>> Which necessitates a key is a little cleaner than your latter example.
> 
> Yeah, I also think removing keys from a dict while iterating over it
> (like in Steven's examples) looks a bit dangerous dangerous.

It is dangerous. That's why I didn't do it.

I very carefully iterated over a list, not the dictionary, and in fact put
in a comment explicitly saying that you can't iterate over the dictionary:

for key in some_dict.keys(): 
    # can't iterate over the dictionary directly!
    do_something_with(some_dict.pop(key))


If you try to iterate over the dictionary directly, you get a RuntimeError
exception when the dictionary changes size. Unfortunately, the exception
isn't raised until AFTER the dictionary has changed size.

>>> D = {1:1, 2:2}
>>> for key in D:
...     D.pop(key)
...
1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
RuntimeError: dictionary changed size during iteration
>>> D
{2: 2}


That's a gotcha to watch out for: the exception isn't raised until
the damage is done.



> Assuming you meant "dict1.pop" instead ot dict2.pop above, your
> example might be written
> 
>     dict2 = dict((k, dict1.pop(k)) for k in dict1 if some_condition(k))
> 
> avoiding some namespace pollution etc.

You get a RuntimeError exception when dict1 changes size.

You know, if I were easily offended, I'd be offended that you accused _me_
of writing dangerous code when my code both worked and worked safely,
while your code failed and did damage when it did so (dict1 irretrievably
loses an item).

*wink*



-- 
Steven.



From gagsl-py2 at yahoo.com.ar  Sun Mar 11 08:58:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 09:58:09 -0300
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
	<2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>
	<slrnev6nob.oj9.jon+usenet@snowy.squish.net>
	<mailman.4930.1173605398.32031.python-list@python.org>
	<slrnev7o0j.ejv.jon+usenet@snowy.squish.net>
	<mailman.4936.1173614117.32031.python-list@python.org>
	<slrnev7sv6.837.jon+usenet@snowy.squish.net>
Message-ID: <op.to0zm7xkx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 09:19:51 -0300, Jon Ribbens  
<jon+usenet at unequivocal.co.uk> escribi?:

> In article <mailman.4936.1173614117.32031.python-list at python.org>,  
> Gabriel Genellina wrote:
>>>>> I don't know, but stock Python 2.5 seems to stick mysterious '.egg'
>>>>> files in the site-packages directory when you install things.
>>>>
>>>> Which "stock" Python? Not the one from www.python.org...
>>>
>>> Yes, the one from www.python.org.
>>
>> Those .egg must come from other installed packages...
>
> My mistake, they are ".egg-info". And they certainly do come from
> stock Python 2.5 from www.python.org and not anything else. They
> are installed by distutils/command/install_egg_info, which is
> automatically called by 'python setup.py install'.

Ah! Those files contain metadata about the installed packages. See  
http://docs.python.org/whatsnew/whatsnew25.html , but I think the actual  
version is http://www.python.org/dev/peps/pep-0345/ . Anyway, nowhere says  
that the PKG-INFO files are actually copied as packagename.egg-info

-- 
Gabriel Genellina



From pecora at anvil.nrl.navy.mil  Sat Mar 10 12:20:45 2007
From: pecora at anvil.nrl.navy.mil (Lou Pecora)
Date: Sat, 10 Mar 2007 12:20:45 -0500
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
	<pan.2007.03.09.15.33.01.991831@gmx.net>
	<pecora-0239F9.11184709032007@ra.nrl.navy.mil>
	<mailman.4861.1173457483.32031.python-list@python.org>
Message-ID: <pecora-57A332.12204510032007@ra.nrl.navy.mil>

In article <mailman.4861.1173457483.32031.python-list at python.org>,
 "Simon Brunning" <simon at brunningonline.net> wrote:

> On 3/9/07, Lou Pecora <pecora at anvil.nrl.navy.mil> wrote:
> > I have noticed that using from xxx import * can lead to problems when
> > trying to access variables in the xxx module.
> 
> Don't do it, then. ;-)

I don't anymore.  But I find it's good to understand these things since 
there's something fundamental that I am missing that may later be 
useful.  This turned out to be the case as someone else in this thread 
(Dennis) gave a very good explanation of the source of the problem.

-- Lou Pecora  (my views are my own) REMOVE THIS to email me.


From Thomas.Ploch at gmx.net  Wed Mar 14 17:15:09 2007
From: Thomas.Ploch at gmx.net (Thomas Ploch)
Date: Wed, 14 Mar 2007 22:15:09 +0100
Subject: os.path.basename() - only Windows OR *nix?
In-Reply-To: <45f8570f$0$10407$426a34cc@news.free.fr>
References: <mailman.5102.1173898151.32031.python-list@python.org>
	<45f8570f$0$10407$426a34cc@news.free.fr>
Message-ID: <45F865DD.4050109@gmx.net>

Bruno Desthuilliers schrieb:
> 
> Let me guess : your cgi script is running on *n*x ?-)
> 

Pretty hard to get this one, heh? :-D

> 
> Probably.

Good that you decided I was worth the information.

>  >>> fnames = "C:\\dir\\data.ext", "/dir/data.txt", "dir:data"
>  >>> import ntpath, posixpath, macpath
>  >>> def basename(filename):
> ...     for m in ntpath, posixpath, macpath:
> ...             if m.sep in filename:
> ...                     return m.basename(filename)
> ...     else:
> ...             # XXX
> ...             raise SomeException('could not do the job')
> ...
>  >>> for f in fnames:
> ...     print f, basename(f)
> ...
> C:\dir\data.ext data.ext
> /dir/data.txt data.txt
> dir:data data
>  >>>
> 

Thnaks a lot. :)

Thomas



From goodTweetieBird at hotmail.com  Wed Mar 21 16:02:19 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 21 Mar 2007 13:02:19 -0700
Subject: Delete a function
In-Reply-To: <mailman.5409.1174499156.32031.python-list@python.org>
References: <1174494159.024910.151540@l75g2000hse.googlegroups.com>
	<mailman.5405.1174495228.32031.python-list@python.org>
	<1174496687.142300.205350@n76g2000hsh.googlegroups.com>
	<mailman.5409.1174499156.32031.python-list@python.org>
Message-ID: <1174507339.562905.17070@b75g2000hsg.googlegroups.com>

On Mar 21, 12:45 pm, paul <p... at subsignal.org> wrote:
> gtb schrieb:> On Mar 21, 11:37 am, Steve Holden <s... at holdenweb.com> wrote:
> >> gtb wrote:
> >>> After a function has been imported to a shell how may it be deleted so
> >>> that after editing it can reloaded anew?
> >> Use the built-in reload() function to reload the module that defines the
> >> function.
> > Thanks, tried that now and get nameError: with the following.
>
> > import sys
> > sys.path.append("c:\maxq\testScripts")
>
> > from CompactTest import CompactTest
>> > from compactLogin import dvlogin
>
> > reload(compactLogin)
>
> you haven't imported compactLogin but dvlogin from the compactLogin
> namespace. Try:
>
> import compactLogin
> ...do something with compactLogin.dvlogin...
>
> reload(compactLogin)
>
> cheers
>  Paul

~~~~~~~~~~~~~~~~

> Eventually you'll develop a feel for how namespaces work in Python...

... where " 0 < Eventually < Infinity " ;^)

Whoa, my brain is full, I'll glean it directly tho. Thanks all for
posting.



From laurent.pointal at limsi.fr  Tue Mar 20 09:25:06 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Tue, 20 Mar 2007 14:25:06 +0100
Subject: How many connections can accept a 'binded' socket?
In-Reply-To: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>
References: <1174394892.554418.313340@y80g2000hsf.googlegroups.com>
Message-ID: <etonao$c5l$1@news2.u-psud.fr>

billiejoex a ?crit :
> Hi,
> I'm writing a small asyncore-based server application serving a lot of
> clients. When I have to handle more than 1021 client simoultaneously
> the 'binded' socket object raises an error:
> 
> [...]
> connections: 1018
> connections: 1019
> connections: 1020
> connections: 1021
> Traceback (most recent call last):
>   File "asyncore_client.py", line 31, in <module>
>   File "asyncore.py", line 191, in loop
>   File "asyncore.py", line 138, in poll
>   File "asyncore.py", line 80, in write
>   File "asyncore.py", line 76, in write
>   File "asyncore.py", line 395, in handle_write_event
>   File "asyncore_client.py", line 24, in handle_connect
>   File "asyncore_client.py", line 9, in __init__
>   File "asyncore.py", line 257, in create_socket
>   File "socket.py", line 156, in __init__
> socket.error: (24, 'Too many open files')
> 
> I just wanna know: is there a way to know how many connections can
> accept a 'binded' socket BEFORE getting such error? Maybe
> socket.SOMAXCONN could help me?

Here you get out of file descriptors, I dont think SOMAXCONN would help.

Under Linux (maybe Unix), there is ulimit -n nnn to setup the maximum
number of files descriptors. I don't know its upper limit (maybe a
kernel compile time information).




From gagsl-py2 at yahoo.com.ar  Fri Mar 23 15:34:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 16:34:22 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
	<mailman.5496.1174624444.32031.python-list@python.org>
	<1174625242.761663.235320@e1g2000hsg.googlegroups.com>
	<mailman.5506.1174639747.32031.python-list@python.org>
	<1174655250.614164.279240@l77g2000hsb.googlegroups.com>
Message-ID: <op.tpnpzkjzx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 10:07:30 -0300, John Pye <john.pye at gmail.com> escribi?:

> On Mar 23, 7:48 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>>
>> And replace all places where a Python file goes into a C extension, with
>> exportable_file(f)
>
> What about calling mscvrt_get_osfhandle from inside the SWIG wrapper?
> I tried this but it seemed that the function was not exported to the
> DLL.

The idea is to separate both worlds - _get_osfhandle must be called from  
the C runtime used by Python, not the one linked to your extension.

-- 
Gabriel Genellina



From nobody at invalid.com  Thu Mar  8 12:10:59 2007
From: nobody at invalid.com (Erik Johnson)
Date: Thu, 8 Mar 2007 10:10:59 -0700
Subject: Tell me the truth
References: <mailman.4803.1173370150.32031.python-list@python.org>
	<Xns98EDA7205C264duncanbooth@127.0.0.1>
Message-ID: <45f042fb$1@nntp.zianet.com>


"Duncan Booth" <duncan.booth at invalid.invalid> wrote in message
news:Xns98EDA7205C264duncanbooth at 127.0.0.1...
> francois.petitjean at bureauveritas.com wrote:
>
> > After much head scrating and experimenting with dis.dis() I have found
> > that chaining comparisons (with is or ==)  a == b == c in Python is
> > never a good idea. It is interpreted as
> >  ( a == b ) and ( b == c)
> > Such a magic is fine  when we write:
> >  if  0.0 <= x < 1.0:
> > but it renders the outcome of  if a == b == c: somewhat confusing.
>
> I don't understand why it is confusing. What other meaning would you
> expect?

I can see how one might get themselves confused. I think it simply boils
down to thinking that

A == B == C  is shorthand for: (A == B) == C

It's not.  You're asserting that A is equivalent to B and B is equivalent to
C, NOT that the value of comparing A to B is equivalent to C:

>>> False is False
True
>>> False is False is True
False

If what you want is the second form, a pair of parenthesis forcing order of
evaluation will give it to you.

>>> (False is False) is True
True


-ej




From Emile.Boudreau at cognos.com  Fri Mar 30 09:11:25 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Fri, 30 Mar 2007 09:11:25 -0400
Subject: Sending emails to 3 addresses....
In-Reply-To: <9afea2ac0703300612va67dfd7jf73eb90bfb64ee12@mail.gmail.com>
References: <B69357484.8.7032.2@mxextra> <R69358212.47.7059.1@mxextra>
	<9afea2ac0703300612va67dfd7jf73eb90bfb64ee12@mail.gmail.com>
Message-ID: <09042D621CD4AA479C678463F3A646D0F0836E@sottemail1.ent.ad.cognos.com>

Thanks so much I would of never found that out.

Problem SOLVED!!!! 


Emile Boudreau


-----Original Message-----
From: tdwdotnet at gmail.com [mailto:tdwdotnet at gmail.com] On Behalf Of Tim
Williams
Sent: Friday, March 30, 2007 9:12 AM
To: Boudreau, Emile
Cc: python-list at python.org
Subject: Re: Sending emails to 3 addresses....

On 30/03/07, Tim Williams <tim at tdw.net> wrote:

Emile,   (slight change to my original reply)

You are passing the TO addresses as 3 addresses in a single string.

[TO] results in a list containing a single string - not a list
containing 3 individual addresses.

You need to either pass the addresses to the function as a list
containing the 3 addresses as individual strings, and remove the
conversion to a list at sending time.  Or change

[TO]

to

TO.split(',')

HTH :)
 
     This message may contain privileged and/or confidential information.  If you have received this e-mail in error or are not the intended recipient, you may not use, copy, disseminate or distribute it; do not open any attachments, delete it immediately from your system and notify the sender promptly by e-mail that you have done so.  Thank you.


From B.Ogryczak at gmail.com  Thu Mar  1 08:53:03 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 1 Mar 2007 05:53:03 -0800
Subject: How to Read Bytes from a file
In-Reply-To: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
Message-ID: <1172757183.819978.219440@v33g2000cwv.googlegroups.com>

On Mar 1, 7:52 am, "gregpin... at gmail.com" <gregpin... at gmail.com>
wrote:
> It seems like this would be easy but I'm drawing a blank.
>
> What I want to do is be able to open any file in binary mode, and read
> in one byte (8 bits) at a time and then count the number of 1 bits in
> that byte.
>
> I got as far as this but it is giving me strings and I'm not sure how
> to accurately get to the byte/bit level.
>
> f1=file('somefile','rb')
> while 1:
>     abyte=f1.read(1)

import struct
buf = open('somefile','rb').read()
count1 = lambda x: (x&1)+(x&2>0)+(x&4>0)+(x&8>0)+(x&16>0)+(x&32>0)+
(x&64>0)+(x&128>0)
byteOnes = map(count1,struct.unpack('B'*len(buf),buf))

byteOnes[n] is number is number of ones in byte n.





From bignose+hates-spam at benfinney.id.au  Sat Mar  3 04:54:27 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 03 Mar 2007 20:54:27 +1100
Subject: Perl and Python, a practical side-by-side example.
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<54sl5dF21mn73U1@mid.individual.net> <87y7me22dl.fsf@benfinney.id.au>
	<200703030226.29137.kosh@aesaeion.com>
Message-ID: <87tzx21wks.fsf@benfinney.id.au>

William Heymann <kosh at aesaeion.com> writes:

> On Saturday 03 March 2007, Ben Finney wrote:
> > Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
> >
> >     if not recs.has_key(piid):      # [1]
> >
> Why not
>
> if piid not in recs:
>
> That is shorter, simpler, easier to read and very slightly faster.

Perhaps if I'd made my posting shorter, simpler, easier to read and
slightly faster, you might have read the footnote to which the '[1]'
referred.

-- 
 \            "Choose mnemonic identifiers. If you can't remember what |
  `\             mnemonic means, you've got a problem."  -- Larry Wall |
_o__)                                                                  |
Ben Finney



From mikeminer53 at hotmail.com  Sun Mar 18 15:19:16 2007
From: mikeminer53 at hotmail.com (mkPyVS)
Date: 18 Mar 2007 12:19:16 -0700
Subject: Optimization problem
In-Reply-To: <1174240949.085119.79720@p15g2000hsd.googlegroups.com>
References: <1174240949.085119.79720@p15g2000hsd.googlegroups.com>
Message-ID: <1174245556.501842.27620@b75g2000hsg.googlegroups.com>

I would suggest taking a look at the python package networkx. It is a
wonderfully created path optimization and presentation package which
has a fair amount of extensabilty.

Basic lowest cost path solutions should be able to solve your
algorithmic needs here in polynomial time (Typically N**P time..
compute time through path to the number of nodes power) which is
typically adequate for most functional needs ( < 1 sec for 20 nodes)
and presents a simple solution path unless the path you present has
many loop options or path costs which are mal-formed. Good Luck,



From bj_666 at gmx.net  Tue Mar 20 09:29:27 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Tue, 20 Mar 2007 14:29:27 +0100
Subject: How to copy a ClassObject?
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
Message-ID: <pan.2007.03.20.13.29.25.955562@gmx.net>

In <Xns98F98FEF2B9A6mosornet at 161.53.160.64>, Karlo Lozovina wrote:

> how would one make a copy of a class object? Let's say I have:
>   class First:
>     name = 'First'
> 
> And then I write:
>   tmp = First
> 
> then 'tmp' becomes just a reference to First, so if I write 
> tmp.name = "Tmp", there goes my First.name. So, how to make 'tmp' a copy 
> of First, I tried using copy.copy and copy.deepcopy, but that doesn't 
> work.
> 
> P.S.
> Yes, I can do a:
>   class tmp(First):
>       pass
> 
> but I'd rather make a copy than a subclass.

Why?  Python isn't a prototype based programming language.

Ciao,
	Marc 'BlackJack' Rintsch


From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 14 15:41:01 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 20:41:01 +0100
Subject: Constructor of object
In-Reply-To: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
Message-ID: <45f8478d$0$24796$426a74cc@news.free.fr>

inline a ?crit :
> Hello!
> I want to assign self to object of parent class in constructor,

Isn't it the other way round ?-)

> like
> 
> def my_func():
>     ...
>     return ParentClass()
> 
> class MyClass (ParentClass):
>     def __init__(self):
>         self = my_func()

First point : __init_ is *not* the constructor. It's the initializer. 
The constructor is named __new__. You'll find more about __new__ here:

http://www.python.org/download/releases/2.2.3/descrintro/#__new__

Second point: 'self' is just an ordinary local variable. So rebinding it 
has no effect outside the function.

> but it not work, because "object not initialized". What i can do?

Learn to post a full traceback ?-)
(Sorry, just kidding.)

FWIW, I don't know which problem you're trying to solve this way, but 
there may (conditional...) be better solutions. Like using a factory 
function...


From kryptonsuper81 at yahoo.com  Sat Mar 24 02:21:53 2007
From: kryptonsuper81 at yahoo.com (John)
Date: 23 Mar 2007 23:21:53 -0700
Subject: Video sharing social network Teenwag seeks great Python hackers we ll
	wear Python T-shirts at startupschool
Message-ID: <1174717313.746559.67530@y66g2000hsf.googlegroups.com>

Video sharing social network Teenwag seeks great Python hackers we ll
wear Python T-shirts at startup school $100K $5K sign on $2k
referral


http://www.teenwag.com/showvideo/352



From berend at dotmpe.com  Sun Mar 25 13:04:09 2007
From: berend at dotmpe.com (Berend van Berkum)
Date: Sun, 25 Mar 2007 19:04:09 +0200
Subject: Interactive session, alternating prompt. readline? curses?
Message-ID: <20070325170409.GA2313@dotmpe.com>


Hi all,

I'm looking at building an interactive session in front of some
rdfobj instances. I've used cmd and just found code.Interactive*.

Protocol doesn't matter, I'm looking at the UI possibilities. 
History is nice to have and my intention is to write output of 
the session to stdin/stderr.

However, my question, can I change the "prompt" string in respond 
to user input using readline? AFAIK I'll need curses to do this?
And colored prompts?

Example: the prompt, say '>>>', would change depending on wether
I type '<', '@' or ':' (and autocompletion libraries change too) .

I sometimes see some fancy shell output ('percentage loaded'-bars, 
etc) and I'm wondering how to do this with python and what it does 
to stdout. Any pointers?


regards, Berend

PS: please cc, I'm not on list
-- 
 web, http://dotmpe.com                      ()    ASCII Ribbon 
 email, berend:dotmpe:com                    /\                 
 irc, berend/mpe at irc.oftc.net                                



From bbxx789_05ss at yahoo.com  Mon Mar 19 00:44:50 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 18 Mar 2007 21:44:50 -0700
Subject: class objects, method objects, function objects
In-Reply-To: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
References: <1174279117.490381.229370@y66g2000hsf.googlegroups.com>
Message-ID: <1174279490.889161.39300@y80g2000hsf.googlegroups.com>

Oops, here is that last sentence in context(section 9.3.4):
------------
What exactly happens when a method is called? You may have noticed
that x.f() was called without an argument above, even though the
function definition for f specified an argument. What happened to the
argument? Surely Python raises an exception when a function that
requires an argument is called without any -- even if the argument
isn't actually used...

Actually, you may have guessed the answer: the special thing about
methods is that the object is passed as the first argument of the
function. In our example, the call x.f() is exactly equivalent to
MyClass.f(x). In general, calling a method with a list of n arguments
is equivalent to calling the corresponding function with an argument
list that is created by inserting the method's object before the first
argument.

If you still don't understand how methods work, a look at the
implementation can perhaps clarify matters. When an instance attribute
is referenced that isn't a data attribute, its class is searched. If
the name denotes a valid class attribute that is a function object, a
method object is created by packing (pointers to) the instance object
and the function object just found together in an abstract object:
this is the method object. When the method object is called with an
argument list, it is unpacked again, a new argument list is
constructed from the instance object and the original argument list,
and the function object is called with this new argument list.
------------



From inq1ltd at verizon.net  Sat Mar 17 11:01:37 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Sat, 17 Mar 2007 11:01:37 -0400
Subject: SQLite3, data not found
In-Reply-To: <16651e80703161523m12462f6s554593551b164444@mail.gmail.com>
References: <200703161755.58549.inq1ltd@verizon.net>
	<16651e80703161523m12462f6s554593551b164444@mail.gmail.com>
Message-ID: <200703171101.37545.inq1ltd@verizon.net>

On Friday 16 March 2007 18:23, Jerry Hill wrote:
> On 3/16/07, jim-on-linux <inq1ltd at verizon.net> 
wrote:
> > Below, the first select produces results but,
> > after closing then re-opening the database
> > the select produces an empty list.  Anyone
> > know the reason ??
>
> When you first open a connection, you
> implicitly begin a transaction. You need to
> call con.commit() before you close the
> connection, or your transaction will be rolled
> back when you close() it.  If don't want to
> bother with transaction handling, you can turn
> it off when you open the connection, like this:
> con = sqlite3.connect('myData',
> isolation_level=None)
>
> See the Python Database API 2.0 PEP for more
> details about the behavior required of DB-API
> 2.0 compliant interfaces:
> http://www.python.org/dev/peps/pep-0249/
>
> --
> Jerry

Thanks, this saves a lot of con.commit action.
And the website is valuable.

jim-on-linux 


From bdesth.quelquechose at free.quelquepart.fr  Sun Mar  4 17:48:26 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 04 Mar 2007 23:48:26 +0100
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <esfeng$ui5$00$1@news.t-online.com>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45eb3b34$0$1404$426a74cc@news.free.fr>
	<esfeng$ui5$00$1@news.t-online.com>
Message-ID: <45eb44c8$0$18252$426a74cc@news.free.fr>

Peter Otten a ?crit :
> Bruno Desthuilliers wrote:
> 
> 
>>         print >> output, sorted(decorated_lines, reverse=True)[0][1]
> 
> 
> Or just
>            print >> output, max(decorated_lines)[1]

Good point. More explicit, and a bit faster too. Thanks Peter.


From david at boddie.org.uk  Mon Mar  5 20:27:17 2007
From: david at boddie.org.uk (David Boddie)
Date: Tue, 06 Mar 2007 02:27:17 +0100
Subject: PyQt4: Clickable links in QLabel?
References: <XaydncLKqZaMFXvYRVnzvA@telenor.com>
Message-ID: <4a83c$45ecc377$54d1d767$29004@news.chello.no>

On Thursday 01 March 2007 09:00, Tina I wrote:

> A short and sweet question: Is it possible to put a clickable link in a
> QLabel that will open in the systems default browser?

Yes.

> I tried to put in some HTML but it did (of course?) simply display the
> code instead of a link. I also tried to set openExternalLinks 'true' but
> then pyuic4 bombed.

Well, that shouldn't happen. :-(

Can you send a bug report to the PyQt mailing list (assuming you're
subscribed to it) with the error message or backtrace that you get
when this happens?

> I see that QLabel does not have a html text format but I'm still hoping
> it's possible. I really need a link on my main window form.

If you enclose the HTML with <qt> and </qt> tags, the HTML should be
displayed properly. Any other matching tags should also work, so you
could use <p> and </p> if you want.

Setting the label's openExternalLinks property to True should then
enable what you want. You can try this out by previewing the form in
Qt Designer.

David


From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 25 18:25:54 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Mon, 26 Mar 2007 08:25:54 +1000
Subject: a calendar example
References: <1174846194.616548.210390@p15g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.25.22.25.53.335855@REMOVE.THIS.cybersource.com.au>

On Sun, 25 Mar 2007 11:09:54 -0700, gslm wrote:

> Hi!
> I want to do a calendar where pictures on.Can you have any free
> example like this which can help me ?
> Regards...


These websites can help you:

http://search.yahoo.com/
http://www.google.com/



-- 
Steven.



From KDawg44 at gmail.com  Wed Mar 14 15:46:38 2007
From: KDawg44 at gmail.com (KDawg44)
Date: 14 Mar 2007 12:46:38 -0700
Subject: Beginner question: difference between lists and tuples
Message-ID: <1173901598.431739.164380@o5g2000hsb.googlegroups.com>

Hi,

I am trying to learn python.  I am working through a tutorial on
python.org.  I am trying to figure out how lists are different than
tuples other than changing values at specific indices.  How are these
different from arrays in other languages such as php?

THanks.



From jstroud at mbi.ucla.edu  Sat Mar 24 20:48:42 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sun, 25 Mar 2007 00:48:42 GMT
Subject: Step value and function
In-Reply-To: <1174780304.127866.251340@p77g2000hsh.googlegroups.com>
References: <1174780304.127866.251340@p77g2000hsh.googlegroups.com>
Message-ID: <KFjNh.3039$Kd3.709@newssvr27.news.prodigy.net>

israphelr at googlemail.com wrote:
> Hi there. So I have a challenge in the Python book I am using (python
> programming for the absolute beginner) that tells me to improve a
> function, so that it can be called with a step value, and I havn't
> been able to find out yet what's meant by a step value, but i'll keep
> looking of course. I'd just be grateful if someone could illimunate
> this for me.
> 
> Thanks in advance.
> 

Trivial and redundant examples, but you get the point:

def doit(start, stop):
   for i in range(start, stop):
     print i

def doit_step(start, stop, step):
   for i in range(start, stop, step):
     print i

At work:

py> doit(2, 11)
2
3
4
5
6
7
8
9
10
py> doit_step(2, 11, 2)
2
4
6
8
10


From steve at REMOVEME.cybersource.com.au  Thu Mar  1 23:14:11 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 02 Mar 2007 15:14:11 +1100
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
Message-ID: <pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>

On Thu, 01 Mar 2007 21:45:55 +0100, Bruno Desthuilliers wrote:

> As a side note : hungarian notation is usually considered bad form here. 
> Look here for usual naming conventions:
> http://www.python.org/dev/peps/pep-0008/

Which Hungarian notation do you mean?

If you mean the Windows "Systems Hungarian", where the prefixes on
variable names is just an underpowered, manual and redundant type system,
then you're right.

But if you mean the original "Apps Hungarian", where prefixes are used to
indicate semantic KINDS of data (e.g. distances in inches versus distances
in millimetres) then I think Joel Spolsky makes a good defence of Apps
Hungarian.

http://www.joelonsoftware.com/articles/Wrong.html

Some years ago, an expensive Mars lander crashed into the planet because
somebody mistakenly compared inches to millimetres. They had done
something conceptually like this:


# we use Systems Hungarian, or a type system that knows about floats
# get the distance to the surface of the planet in millimeters
fpCurrentHeight = radar_unit.get_height_above_planet()  # a float
# 
# ... many lines of code ...
# 
# get the critical height in inches at which we need to engage
# the retro-rockets
fpCriticalHeight = calculate_height(speed, fuel, mass) # also a float
#
# ... many more lines of code ...
#
if fpCurrentHeight <= fpCriticalHeight:
    # safe because both objects are floats
    engage_the_retro_rockets()


A type system doesn't help. So what if they're both floats? The test
is still bogus, your code will still wait too long to engage the
retro-rockets, and the billion dollar space craft will still be travelling
at hundreds of miles an hour when it reaches the surface of Mars.

Oops.

But if you used Apps Hungarian, and saw this line of code:

if hmmCurrentHeight <= hinCriticalHeight:

then you should instantly recognise that there's a problem. Comparing
a height in millimetres to a height in inches is not a good thing to do,
no matter that they're both floats.



-- 
Steven D'Aprano 



From http  Sat Mar 10 17:50:34 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 14:50:34 -0800
Subject: distributed queue?
Message-ID: <7xwt1olnlx.fsf_-_@ruckus.brouhaha.com>

Does anyone have an implementation of a distributed queue?  I.e. I
have a long running computation f(x) and I'd like to be able to
evaluate it (for different values of x) on a bunch of different
computers simultaneously, the usual "worker thread" pattern except
distributed across a network.  I guess this is pretty easy to write
with a centralized socket listener that dispatches requests through a
Queue to multiple threads on the same machine, each talking
synchronously to a server socket.  I wonder if something like it
already exists.  I see a little bit of discussion in the newsgroup
archive but no obvious pointers to code.

Thanks.


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From: johntristy at yahoo.com (johntristy at yahoo.com)
Date: 7 Mar 2007 18:03:17 -0800
Subject: www.OutpatientSurgicare.com/video/
Message-ID: <1173319397.188058.286680@8g2000cwh.googlegroups.com>

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From frikker at gmail.com  Mon Mar 19 09:22:42 2007
From: frikker at gmail.com (frikk)
Date: 19 Mar 2007 06:22:42 -0700
Subject: Real Time Embedded Systems Monitor in Python?
Message-ID: <1174310562.286168.74350@y80g2000hsf.googlegroups.com>

Hey Everyone!
I've got a question regarding the capabilities of python in a real
time environment. I'll start by saying I'm a little bit flaky when it
comes to terminology, so please correct me or ask where it seems I'm
not beings specific or using the wrong wording.

I am looking into a project for the company I work for.  Essentially
it involves setting up a real time monitor / signal injector in
between a CPU board and a system controller.  The system controller
sends signals (message packets) to the CPU board.  We would like to
create an environment where we can modify signals, inject new
messages, drop signals, etc.  This would simulate communication
failures and message dropouts to see how the CPU board responds.  The
application monitor would use a COM port to send and receive
messages.  The most important part about this monitor is that
absolutely no messages get delayed or dropped due to inturrupts or lag
on the PC that the monitor is running on. What would be the expected
sampling time range that I could expect to handle?

I have seen similar applications written for other projects that we
have which were done in Visual Basic. I assume that if VB is up to the
task, Python should be as well.  What kind of libraries am I looking
at? I will probably use wxWindows, but what about for the serial ports
and packet timing?

Like I said - I'm not sure what kind of "real time" this is - all I
know is that I need messages to not get dropped when they're received.

Thanks!
Blaine Booher



From mail at microcorp.co.za  Fri Mar  2 00:23:43 2007
From: mail at microcorp.co.za (Hendrik van Rooyen)
Date: Fri, 2 Mar 2007 07:23:43 +0200
Subject: Dialog with a process via subprocess.Popen blocks forever
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com><mailman.4554.1172731034.32031.python-list@python.org>
	<1172741705.054546.188890@m58g2000cwm.googlegroups.com>
Message-ID: <005f01c75c8a$f2312de0$03000080@hendrik>

 <bayer.justin at googlemail.com> wrote:



> Hi,
> 
> Thanks for your answer. I had a look into the fcntl module and tried
> to unlock the output-file, but
> 
> >>> fcntl.lockf(x.stdout, fcntl.LOCK_UN)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> IOError: [Errno 9] Bad file descriptor
> 
> I wonder why it does work with the sys.stdin It's really a pity, it's
> the first time python does not work as expected. =/
> 
> Flushing the stdin did not help, too.

its block, not lock, and one uses file.flush() after using file.write(),
so the stdin is the wrong side - you have to push, you can't pull.. 

Here is the unblock function I use  - it comes from the internet,
possibly from this group, but I have forgotten who wrote it.

# Some magic to make a file non blocking - from the internet

def unblock(f):
    """Given file 'f', sets its unblock flag to true."""

    fcntl.fcntl(f.fileno(), fcntl.F_SETFL, os.O_NONBLOCK)

hope this helps - note that the f is not the file's name but the
thing you get when you write :

f = open(...

- Hendrik



From aleax at mac.com  Thu Mar 29 03:44:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 29 Mar 2007 00:44:10 -0700
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
Message-ID: <1hvpoc7.wy1rde1dv7pl5N%aleax@mac.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
   ...
> In general:
> 
> - use a list comprehension when you need to calculate the list items
> 
> - use slicing when you are copying an actual list, or if you don't care
> what type of object you get
> 
> - use the list() function when your existing object might not be an actual
> list, and you want the copy to be a list.

Personally, I don't like the looks of:
    newlist = oldlist[:]

It's always looked more like Perl than Python to me.  I prefer:
    newlist = list(oldlist)

There may be a small performance hit (since Python must lookup the name
'list') but it's typically not important (save in extreme
bottlenecks:-).  It's way faster than copy.copy(oldlist), anyway:-)

I particularly like the way "calling the type for shallow copies" is
conceptually uniform across types, e.g.:

    newlist = list(oldlist)
    newdict = dict(olddict)
    newtuple = tuple(oldtuple)
    newset = set(oldset)

versus the mishmash one gets by using slicing for the sequences and
.copy() for the dict and set.

A matter of purely stylistic importance, of course.


Alex



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 04:06:39 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 06:06:39 -0300
Subject: splitting common functions into a sepperate module
References: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>
Message-ID: <op.tou4xdk1x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 05:45:24 -0300, <jonkersbart at gmail.com> escribi?:

> I have wrote a script and want to group some functions of the script
> in a separate modulo so that I can import the module in other scripts
> and use the same functions there..
>
> The problem is that the common functions need access to some global
> variables defined in the script. Python uses different namespaces for
> different modules so I can't access the variables of the script in the
> module.

Are those *really* global variables? If yes, you could put them in yet  
another module, maybe config.py, and always get/set them using:
import config
config.xxx = "abc"
foo(x, config.yyy)
(do *not* use: from config import xxx)

Or, you may consider placing the global variables on the same module as  
those common functions (if that make some sense...)

But perhaps they are not really global variables, and you can use some  
class to hold them, specially if you can logically attach some methods to  
it.

Without further knowledge of the application, that's all I can say.

-- 
Gabriel Genellina



From bignose+hates-spam at benfinney.id.au  Mon Mar 12 18:32:51 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Tue, 13 Mar 2007 09:32:51 +1100
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
Message-ID: <874poqxfcc.fsf@benfinney.id.au>

aleax at mac.com (Alex Martelli) writes:

> This is not trivial to fix cleanly...:-(.  compiler_add_o would have
> to test "is the object I'm storing -0.0" (I don't even know how to
> do that in portable C...) and then do some kludge -- e.g. use as the
> key into the dict (-0.0, 0) instead of (-0.0, float) for this one
> special case.

Another way, which avoids making this decision, is to always store the
sign *and* value of the number as part of the key. I don't know if
that tradeoff is the right one though.

-- 
 \       "Our products just aren't engineered for security."  -- Brian |
  `\             Valentine, senior vice-president of Microsoft Windows |
_o__)                                                      development |
Ben Finney



From bearophileHUGS at lycos.com  Tue Mar  6 18:13:47 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 6 Mar 2007 15:13:47 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173200323.696497.139590@c51g2000cwc.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
	<1173200323.696497.139590@c51g2000cwc.googlegroups.com>
Message-ID: <1173222827.369564.55170@t69g2000cwt.googlegroups.com>

Alex Li:
> Now, I am sure we will redo it in C# after my "prototype";

Sadly this happens often, they don't want to keep using two languages
when one may suffice. On the other hand, you may even find a way to
adapt your Python code to IronPython, so maybe you can avoid the
translation to C#.

Bye,
bearophile



From gagsl-py2 at yahoo.com.ar  Sat Mar 10 18:08:27 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 20:08:27 -0300
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<7xr6rwhpdb.fsf@ruckus.brouhaha.com>
Message-ID: <op.tozw8dhax6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 10 Mar 2007 16:26:08 -0300, Paul Rubin  
<"http://phr.cx"@NOSPAM.invalid> escribi?:

> "Jack" <nospam at invalid.com> writes:
>> Also, if I have an int, I can convert it to unsigned int in C:
>>    int i = -3;
>>    int ui = (unsigned int)i;
>
> I just tried it:
>
>     main() {
>       int i = -3;
>       unsigned int ui = i;
>       printf("%d\n", ui);
>     }
>
> prints -3.  What do you want the conversion to do?  If you want
> the absolute value, use abs().

Try again with "%u". Passing i or ui makes no difference, both push the  
same value on the stack. C relies on the format string to interpret the  
arguments.

-- 
Gabriel Genellina



From edfialk at gmail.com  Mon Mar 12 17:16:14 2007
From: edfialk at gmail.com (edfialk)
Date: 12 Mar 2007 14:16:14 -0700
Subject: Interface in IronPython
Message-ID: <1173734174.730471.149680@j27g2000cwj.googlegroups.com>

Hi all, I'm pretty much totally new to IronPython and have come to the
point that I need an interface to interact with a co-worker's code,
but I can't seem to find any documents or discussion on syntax for
writing an interface.

Does anyone know of a link that talks about interfaces in IronPython
or feel like explaining one too me? :)

Any advice would be greatly appreciated.
Thanks.
-Ed



From superflit at gmail.com  Thu Mar 22 01:59:46 2007
From: superflit at gmail.com (flit)
Date: 21 Mar 2007 22:59:46 -0700
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1tkMh.115$mG4.94@newsfe12.lga>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1tkMh.115$mG4.94@newsfe12.lga>
Message-ID: <1174543186.407031.165640@l77g2000hsb.googlegroups.com>

I didn?t reply to the last D?Aprano reply just to avoid this kind of
social war.
And yes, I know that if I want 100% security I should not distribute
my code. And there is a better way that is not doing any code to be
more secure and bug-free (now I am using irony).
And no, I am not supporter of software patents, RIAA and DRM.

And Mr. Willems understood very well my problem and my condition. And
others too in the beginning of the post.
But look...after mr D?Aprano enters it starts this social warfare.....

So where is the troll?

In fact I think the heroes series was based in this thread (Hiros read
it and come back in time)
Because there is some people who have special DNAs that give powers to
see beyond their problems and environments, so they can read the post,
understand and give technical details, understanding this is not
comp.lang.python.social-activism-political-be-open-not-evil

About trolls:

No way I will do this question only to say to others:
"Look python can?t do this like xxxx does.."
or
"Look now I will active the "pet-people-living-in-welfare-trying-to-be-
political" in the list and they will join and sing songs about the
revolution.."

if you do a search in this group for this problem you will see more
political whining than answers in this type of questions...

Just look this post!! Seriously read one by one.... Begining ok.. 2
ok ,3 ok , 4 ok .. and bang..!!!

Going back in the beginning I said :

 "So PLEASE, don't try to convince me about the social / economical /
open source / give to all / be open / all people are honest until
prove contrary / dance with the rabbits... "

So who is failing to acknowledge the question? AND AGAIN someone will
search for "protecting python code" and will see the same whining and
political threads...
I think the python community is great, and I love the python language,
if you search for superflit in this group you will see that I love
python and the community, I am a newbie, but I am not imposing my
beliefs I am just saying that my reality is a little different and I
need a answer for a particular problem.
That is the reason because I always recommend people to travel out of
their CONTINENT, and stay more than 5 months living in another
culture.
I can elaborate a more "intelectual" answer but sorry. I have to work
at 6:00 am to pay my bills, and if I get unemployed there is no
welfare, nothing , nada, zero.
I believe in reincarnation, so next time I will aim better :)
For me this thread is closed, and I think this is the most crazy
thread in this list.
Thank you all, for the technical answers, and sorry if I insult anyone
directly or indirectly ( I am a political incorrect person)
That?s all folks..finito







From aleax at mac.com  Thu Mar 15 23:59:15 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 20:59:15 -0700
Subject: problem with str()
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
	<mailman.5149.1173990948.32031.python-list@python.org>
	<1173992205.985657.167970@y66g2000hsf.googlegroups.com>
	<mailman.5154.1173999970.32031.python-list@python.org>
	<1hv191c.1bj9j73fp25ldN%aleax@mac.com>
	<mailman.5163.1174014892.32031.python-list@python.org>
Message-ID: <1hv1bk3.modl62cxe9w3N%aleax@mac.com>

Steve Holden <steve at holdenweb.com> wrote:
   ...
> >> Get yourself a stuffed bear, and next time you have this kind of problem
> >> spend a few minutes explaining to the bear exactly how your program
> >> can't possibly be wrong. Works like a charm.
> > 
> > A rubber ducky works much better for that, btw -- more easily washable
> > than a stuffed bear, for example.
> > 
> But stuffed bears are so much more knowledgeable about the minutiae of
> software design.

And yet, the key to Python's strength is duck typing -- if you can teach
the duck to type, you've got it made.


Alex


From psdasilvaX at esotericaX.ptX  Thu Mar 15 23:18:24 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 16 Mar 2007 03:18:24 +0000
Subject: Subclassing: what is wrong here?
In-Reply-To: <1174006052.451994.292820@d57g2000hsg.googlegroups.com>
References: <1174003302.156908@jubilee.claranet.pt>
	<1174006052.451994.292820@d57g2000hsg.googlegroups.com>
Message-ID: <1174015106.967443@jubilee.claranet.pt>

Miki escreveu:
> Hello Paulo,
> 
>> What's wrong with this way of subclassing?
>> ...
> See  http://sourceforge.net/tracker/index.php?func=detail&aid=1448640&group_id=5470&atid=105470
> 
> HTH,
> --
> Miki <miki.tebeka at gmail.com>
> http://pythonwise.blogspot.com
> 

Thanks!
It works this way:

class MyDate(date):
	def __new__(cls,year,month=None,day=None):
		if type(year) is str:
			# The whole date is here as a string
			year,month,day=map(int,string.split(year,'-'))
		if year<100:
			year+=2000
		return date.__new__(cls,year,month,day)



From joshbloom at gmail.com  Wed Mar 21 16:08:45 2007
From: joshbloom at gmail.com (Josh Bloom)
Date: Wed, 21 Mar 2007 13:08:45 -0700
Subject: Printing __doc__
In-Reply-To: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
Message-ID: <d25b6e9a0703211308y4394d196ua2ef98c46c998b74@mail.gmail.com>

This will work, but I'm getting out of my depth as to whether its a good
idea to do or not.

import sys

def testFunc():
    ''' Here is my doc string'''
    n = sys._getframe().f_code.co_name
    print eval(n).__doc__

testFunc()

The issue being that n is a simply a string containing the name of the
function. You'll need the actual function itself to get its docstring.

-Josh


On 21 Mar 2007 12:47:06 -0700, gtb <goodTweetieBird at hotmail.com> wrote:
>
> Greetings,
>
> Don't know the daily limit for dumb questions so I will ask one or
> more.
>
> In a function I can use the statement n =
> sys._getframe().f_code.co_name to get the name of the current
> function. Given that I can get the name how can I print the __doc__
> string? I cant use the following, it will tell me to bugger off as the
> string has no such attribute.
>
> def spam(self):
>     n = sys._getframe().f_code.co_name
>     print n.__doc__      #Wrong
>     print __doc__         #No good either
>     #....
>
>
> thanx,
>
> gtb
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From NunezD at gmail.com  Fri Mar 16 15:35:02 2007
From: NunezD at gmail.com (hiro)
Date: 16 Mar 2007 12:35:02 -0700
Subject: python noob, multiple file i/o
In-Reply-To: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
Message-ID: <1174073702.479348.295100@l77g2000hsb.googlegroups.com>

Thanks a lot for the help guys, I'm at work right now and I will go
over your suggestions one by one this weekend.  Being more alert now,
taking a look at the examples you posted, I now see how to approach
this problem.  The thing with python that I'm starting to realize is
that there are a million different ways to approach a problem, so I
find it great for experimenting (when time allows) yet very
challenging to choose an approach.

Cheers,

h.



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 21:15:49 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 23:15:49 -0300
Subject: Python threading
References: <1173374702.195390.90550@s48g2000cws.googlegroups.com>
Message-ID: <op.towgkni4x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 14:25:02 -0300, <test.07 at gmail.com> escribi?:

> I am wondering what happens to a thread in python in relation to
> win32com extensions.
>
> If I create a new thread, that uses the Dispatch method from win32com,
> what happens to the memory allocated in that thread when the thread is
> done. Will the Dispatch release the memory it created, or will the
> memory remain?
>
> The problem rises from the fact that Dispatch does not seem to release
> memory correctly every time. If I include the commands in a thread by
> themselves, will the thread clean up ALL memory it used after it is
> done?

All threads share the same memory space, there is not a "per-thread"  
memory allocator, if that's what you are thinking.
Perhaps you hold a reference to some objects in the Thread object? Or you  
still keep the Thread object itself?

> I did try the pythoncom.CoUnitialize() to release memory, but it
> doesn't seem to work (it does work about 30-45 seconds after the
> command is run).

I don't understand what you say here.
What means "it doesn't seem to work" and "it does work 30 seconds after"?

> Any input is greatly appreciated (on the thread issue or how to use
> the pythoncom.CoUnitiliaze() to make it release memory right away).

What memory do you want to release "right away"?

-- 
Gabriel Genellina



From dbraband at gmail.com  Thu Mar  8 05:50:23 2007
From: dbraband at gmail.com (Danilo)
Date: 8 Mar 2007 02:50:23 -0800
Subject: Configuration: Apache + mod_python
Message-ID: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>

Hi there,

is it possible to create a rewrite rule to send every server-request
to the directory /py? But only if the file does not exists on the
server.

This is my mod_python section of the apache config-file.

<Location "/py">
	SetHandler python-program
	PythonHandler django.core.handlers.modpython
	PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
	SetEnv DJANGO_SETTINGS_MODULE myapp.settings
	PythonDebug Off
</Location>

Thanks.



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 28 19:27:30 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 29 Mar 2007 01:27:30 +0200
Subject: how can I clear a dictionary in python
In-Reply-To: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
Message-ID: <460af12d$0$2121$426a74cc@news.free.fr>

Marko.Cain.23 at gmail.com a ?crit :
> Hi,
> 
> I create a dictionary like this
> myDict = {}
> 
> and I add entry like this:
> myDict['a'] = 1
> but how can I empty the whole dictionary?

 >>> help(dict)
Help on class dict in module __builtin__:

class dict(object)
(...)
  |  Methods defined here:
(...)
  |
  |  clear(...)
  |      D.clear() -> None.  Remove all items from D.
(...)
 >>>
 >>> d = dict(a=1, b=2)
 >>> d
{'a': 1, 'b': 2}
 >>> d.clear()
 >>> d
{}
 >>>



From psdasilvaX at esotericaX.ptX  Tue Mar 13 07:23:24 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Tue, 13 Mar 2007 11:23:24 +0000
Subject: Request for a change in the csv module.
In-Reply-To: <55n53lF25s78sU1@mid.uni-berlin.de>
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
	<1173747644.616698@jubilee.claranet.pt>
	<55n53lF25s78sU1@mid.uni-berlin.de>
Message-ID: <1173785251.78605@jubilee.claranet.pt>

Diez B. Roggisch escreveu:
> Paulo da Silva schrieb:
...

>> That works but it is a pain to use.
> 
> Why? I think it's straightforward.

That is not the point. The problem is to have things generalized.
I have some general purpose tables whose fields format I don't know
in advance.
Internally the numeric values are independent of localization.
Having a table, I don't like the idea of preformating things
before sending them to the csv for exportation. A little more
of programming and there will be no need for csv at all :-)
...
> The same is essentially true for dates as well, btw. How do you want to
> deal with them?

This is a pertinent question I didn't think of. May be csv should handle
data conversions using 'locale'.
It is already automatically converting numbers to text
anyway, but unconditionally using the '.'.
As for the dates the dialect could include a format like YYYY-MM-DD
hh:mm:ss. Dates are not always 'locale' only. In pt_PT we use
YYYY-MM-DD or YY-MM-DD and sometimes DD-MM-YYYY.
One must remember that csv is not part of the language. So, to have
some kind of universality, it must use the specs (in dialect) for
formatting and 'locale' for data conversions.



From python at rcn.com  Tue Mar  6 17:40:57 2007
From: python at rcn.com (Raymond Hettinger)
Date: 6 Mar 2007 14:40:57 -0800
Subject: calendar (date) iterator?
In-Reply-To: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
References: <1173210910.945107.255850@64g2000cwx.googlegroups.com>
Message-ID: <1173220857.766875.189280@s48g2000cws.googlegroups.com>

[Marcus]
> I'm looking for useful starting points, suggestions, and sample code,
> to implement a calendar iterator.  Simply, the iterator is seeded with
> an initial calendar date, e.g., "03-12-2006", and then subsequent
> calls to next return subsequent dates.  The seed could be a standard
> calendar/datetime object.
>
> > iter = calendarIterator("03-12-2006")
> > print iter.next()
>
>    03-12-2006

import datetime, time

def calendarIterator(start, fmt='%m-%d-%Y'):
    curr = datetime.date(*time.strptime(start, fmt)[:3])
    one = datetime.timedelta(1)
    while 1:
        curr += one
        yield curr

if __name__ == '__main__':
    iter = calendarIterator('3-12-2006')
    print iter.next()
    print iter.next()





From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 08:13:30 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 20 Mar 2007 23:13:30 +1100
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
Message-ID: <pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>

On Tue, 20 Mar 2007 10:28:10 +0100, Bruno Desthuilliers wrote:

[deploying weapons of mass snippage]

>> Otherwise, the choice between old
>> and new is not very important.
> 
> Your opinion. Too bad you're missing some of the most powerful parts of 
> the language.

Yes, it is my opinion, and it seems that in your zeal to defend new-style
classes against an imaginary attack, you've completely misunderstood what
my opinion is.

I'm not against new-style classes. I do use new-style classes. There are a
whole lot of extra features that new-style classes have that old-style
classes don't have, some of which I didn't even think of. (Thanks for
pointing them out, and I'm not being sarcastic.)

There are plenty of reasons for preferring new style classes. If those
reasons hold for you, then of course you should use new style classes.

But that's not the same thing as saying that you should use new style
classes *even when you don't care about those features*.

I never once suggested that new style classes are unnecessary, or a waste
of time, or bad, or whatever else you seem to think I was saying. My point
was, if you don't _need_ a new style class, there is no reason to avoid
using an old style class. It is a purely personal choice.

There seems to be a misunderstanding that classic classes have been
depreciated. They certainly have not. We've been told that old style
classes will "eventually" disappear, "probably" in Python 3. That is not
the same thing at all. The docs are very careful to avoid saying that old
style classes are depreciated.

(See, for example http://docs.python.org/ref/node33.html)

What I predict is that under the hood, Python 3 will complete the job of
unifying types and classes. The distinction between classic classes and
new style classes will go away. All classes will behave the same, whether
you write "class X:" or "class X():" or "class X(object):" or whatever
syntax Python 3 uses for defining classes.



-- 
Steven.



From metaperl.etc at gmail.com  Sun Mar 18 08:45:05 2007
From: metaperl.etc at gmail.com (metaperl.etc at gmail.com)
Date: 18 Mar 2007 05:45:05 -0700
Subject: most complete xml package for Python?
In-Reply-To: <1173995144.878694.241000@n59g2000hsh.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
	<45F811A3.1050208@web.de>
	<1173887937.251026.175260@y66g2000hsf.googlegroups.com>
	<mailman.5089.1173890827.32031.python-list@python.org>
	<1173908076.351577.75000@n59g2000hsh.googlegroups.com>
	<1173909884.822838.264030@n76g2000hsh.googlegroups.com>
	<55tevoF270hd4U1@mid.uni-berlin.de>
	<1173995144.878694.241000@n59g2000hsh.googlegroups.com>
Message-ID: <1174221905.502229.55940@p15g2000hsd.googlegroups.com>

On Mar 15, 5:45 pm, "Paul Boddie" <p... at boddie.org.uk> wrote:


>
> I can't remember exactly how I solved this within anXML/XSLT-heavy
> Java-based framework,

I just put a single space between:

<script> </script>

and then it kept the XML container-style as opposed to single-tag.



From goodTweetieBird at hotmail.com  Tue Mar 20 17:22:33 2007
From: goodTweetieBird at hotmail.com (gtb)
Date: 20 Mar 2007 14:22:33 -0700
Subject: Imports
In-Reply-To: <1174418741.771343.165360@n76g2000hsh.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>
	<1174417150.930765.141160@l77g2000hsb.googlegroups.com>
	<1174418741.771343.165360@n76g2000hsh.googlegroups.com>
Message-ID: <1174425753.614770.61630@l75g2000hse.googlegroups.com>

On Mar 20, 2:25 pm, kyoso... at gmail.com wrote:
> On Mar 20, 1:59 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
>
>
>
> > On Mar 20, 1:51 pm, kyoso... at gmail.com wrote:
>
> > > On Mar 20, 1:31 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
>
> > > > I am working with a tool called maxQ that generates jython scripts.
> > > > The tool runs in
>
> > > > C:\maxq\bin.
>
> > > > Rather than clutter up bin I want to put the scripts and other .py
> > > > scripts in
>
> > > > c:\maxq\bin\testScripts.
>
> > > > When doing so the scripts need to import from
>
> > > > c:\maxq\jython, but can't find the modules.
>
> > > > I tried adding c:\maxq\jython to the environment variable pythonpath
> > > > but to no avail. Perhaps I missed it in Rossum's tutorial but is there
> > > > a std prgrammatic way to specify a module directory?
>
> > > > Could you, would you, recommend a text or another webpage for learning
> > > > more (much more) about python?
>
> > > > Thanx,
>
> > > > gtb
>
> > > I typically just import sys and then do a
> > > sys.path.append(directoryPath). This basically makes whatever modules
> > > in that path available at run time. If you need a beginners reference
> > > book, I recommend "Beginning Python" by Hetland. "Python Programming
> > > for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
> > > get into the internals of the language like Hetland does. Once you're
> > > a snake charmer too, you can "graduate" to the "Programming Python"
> > > book by Lutz.
>
> > > Mike
>
> > Something else going on then, does the directory path need to be the
> > full path or will it search sub-directories?
>
> > Traceback (most recent call last):
> >   File "C:\maxq-0.98\bin\testScripts\compactLogin.py", line 2, in
> > <module>
> >     from CompactTest import CompactTest
> >   File "c:\maxq-0.98\jython\CompactTest.py", line 2, in <module>
> >     from java.lang import *
> > ImportError: No module named java.lang
>
> > Thanks for the book recommendations.
>
> > gtb
>
> Usually, the sys.path.append will allow Python to search the
> subfolders too, but I have noticed that sometimes it doesn't if you
> use UNC paths. I don't use jython, so maybe there's another way to fix
> this that is more specific to that implementation of Python?
>
> Mike

Thanks for the sys.path.append info. Turns out maxq cranks thing up
with java ( I should have seen it). The sys.path.append does
everything it supposed to do.

gtb



From tjgolden at gmail.com  Tue Mar  6 08:48:26 2007
From: tjgolden at gmail.com (Tim Golden)
Date: 6 Mar 2007 05:48:26 -0800
Subject: askstring Window to the top under Windows
In-Reply-To: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
References: <1173186819.622405.121170@30g2000cwc.googlegroups.com>
Message-ID: <1173188906.327302.291650@s48g2000cws.googlegroups.com>

On Mar 6, 1:13 pm, "iwl" <Ingo.W... at gmx.de> wrote:
> Hi,
>
> I tryed askstring to input some text in my script,
> but some ugly empty Window appears with the
> Input-Window behind and all together behind my
> Console showing my script. So all have to brought
> to the top first by the user - very unconfortable

It's not clear whether you're talking about the usual
"Why do I get a DOS window when I run my python script?"
question -- to which the answer is, in essence, change
your script's extension to .pyw or use the pythonw.exe
executable -- or "Why _when I use askstring_ do I get
an empty window?". If it's the latter, then I don't
know, but can you provide a small example script which
exhibits the behaviour.

TJG



From istvan.albert at gmail.com  Tue Mar  6 15:18:39 2007
From: istvan.albert at gmail.com (Istvan Albert)
Date: 6 Mar 2007 12:18:39 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
Message-ID: <1173212319.214424.320090@64g2000cwx.googlegroups.com>

On Mar 5, 5:16 pm, "Alex Li" <likw... at gmail.com> wrote:

> I tried to avoid.  Any suggestions?

try the networkx package, it includes the pygraphviz module that can
generate dot files:

https://networkx.lanl.gov/wiki

Istvan



From steve at REMOVE.THIS.cybersource.com.au  Fri Mar 23 23:22:09 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 24 Mar 2007 14:22:09 +1100
Subject: Join strings - very simple Q.
References: <1174675011.244339@jubilee.claranet.pt>
	<1174680929.492601.140270@o5g2000hsb.googlegroups.com>
Message-ID: <pan.2007.03.24.03.22.09.963233@REMOVE.THIS.cybersource.com.au>

On Fri, 23 Mar 2007 13:15:29 -0700, John Machin wrote:

> OK, I'll bite: This was "new" in late 2000 when Python 2.0 was
> released. Where have you been in the last ~6.5 years?

Western civilization is 6,000 years old. Anything after 1850 is "new".

*wink*



-- 
Steven.



From albmont at centroin.com.br  Sun Mar 11 22:02:07 2007
From: albmont at centroin.com.br (Alberto Vieira Ferreira Monteiro)
Date: Mon, 12 Mar 2007 02:02:07 +0000
Subject: New to Python
Message-ID: <200703120202.07810.albmont@centroin.com.br>

Hi, I am new to Python, how stupid can be the questions I ask?

For example, how can I add (mathematically) two tuples?
x = (1,2)
y = (3,4)
How can I get z = (1 + 3, 2 + 4) ?

Alberto Monteiro


From deets at nospam.web.de  Tue Mar 13 17:35:20 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 Mar 2007 22:35:20 +0100
Subject: help!! *extra* tricky web page to extract data from...
In-Reply-To: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
Message-ID: <55ojorF26c25jU1@mid.uni-berlin.de>

seberino at spawar.navy.mil schrieb:
> How extract the visible numerical data from this Microsoft financial
> web site?
> 
> http://tinyurl.com/yw2w4h
> 
> If you simply download the HTML file you'll see the data is *not*
> embedded in it but loaded from some other file.
> 
> Surely if I can see the data in my browser I can grab it somehow right
> in a Python script?
> 
> Any help greatly appreciated.

It's an AJAX-site. You have to carefully analyze it and see what 
actually happens in the javascript, then use that. Maybe something like 
the http header plugin for firefox helps you there.

Diez


From nagle at animats.com  Sat Mar 10 12:23:57 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 10 Mar 2007 17:23:57 GMT
Subject: [python-advocacy] A Pythonic Way to Measure and Improve Your
	Programming Skills?
In-Reply-To: <mailman.4914.1173546658.32031.python-list@python.org>
References: <45F14D7E.3060707@taupro.com>	<a06230908c2187f182731@[192.168.1.242]>
	<mailman.4914.1173546658.32031.python-list@python.org>
Message-ID: <NQBIh.6544$M65.4971@newssvr21.news.prodigy.net>

Michael Bernstein wrote:
> On Sat, 2007-03-10 at 10:01 -0600, Brad Allen wrote:
> 
> 
>>When I discussed this problem with Michael Bernstein at PyCon he suggested
>>the idea of creating a "chroot jail" for each web session which could run
>>the Python interpreter in a secure sandbox. That might be easier than giving
>>each session a whole virtual server.
> 
> 
> Note that this wasn't an original idea of mine, I got it from brief
> mentions associated with two existing interactive python-in-a-web-page
> implementations:
> 
>         Try Python: http://www.mired.org/home/mwm/try_python/
>         
>         TryPy: http://trac.pocoo.org/wiki/TryPy

     That's a fun toy.  Of course, your server has to have enough
memory to keep a Python instance open for each connected user, so
there's a scaling issue if you have hundreds or thousands of
people using it.  And you have to have some good way to decide
when the user has disconnected and release the Python instance.

				John Nagle


From starGaming at gmail.com  Thu Mar 22 14:45:20 2007
From: starGaming at gmail.com (starGaming at gmail.com)
Date: 22 Mar 2007 11:45:20 -0700
Subject: #!/usr/bin/env python > 2.4?
In-Reply-To: <slrnf05bcu.cg1.jon+usenet@snowy.squish.net>
References: <1174407745.208492.264020@l75g2000hse.googlegroups.com>
	<mailman.5347.1174409873.32031.python-list@python.org>
	<1174415242.455972.51400@d57g2000hsg.googlegroups.com>
	<etpcon$1g8r$1@ulysses.news.tiscali.de>
	<slrnf020uo.on2.jon+usenet@snowy.squish.net>
	<1174506107.863399.7970@l75g2000hse.googlegroups.com>
	<mailman.5425.1174512989.32031.python-list@python.org>
	<1174580529.081658.326800@b75g2000hsg.googlegroups.com>
	<slrnf05bcu.cg1.jon+usenet@snowy.squish.net>
Message-ID: <1174589120.474725.11780@n59g2000hsh.googlegroups.com>

On Mar 22, 5:23 pm, Jon Ribbens <jon+use... at unequivocal.co.uk> wrote:
> In article <1174580529.081658.326... at b75g2000hsg.googlegroups.com>, starGam... at gmail.com wrote:
> > I don't see any problem with::
>
> > if version_info[0] <= 2 and version_info[1] < 4:
> >     raise RuntimeError()
>
> What if the version number is 1.5?

Ah, now I get your problem. OK.



From mail at timgolden.me.uk  Mon Mar 26 04:59:51 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Mon, 26 Mar 2007 09:59:51 +0100
Subject: Create new processes over telnet in XP
In-Reply-To: <4607873D.5050107@timgolden.me.uk>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>	<46043ad8$0$27402$ba4acef3@news.orange.fr>	<mailman.5531.1174684678.32031.python-list@python.org>	<eu80h6$fno$1@news2.u-psud.fr>
	<4607873D.5050107@timgolden.me.uk>
Message-ID: <46078B87.9040703@timgolden.me.uk>

Tim Golden wrote:
> Laurent Pointal wrote:
>> Shane Geiger a ?crit :
>>> This reminds me of something I once wanted to do:  How can I install
>>> Python in a totally non-gui way on Windows (without the use of VNC)?  I
>>> think I was telnetted into a computer (or something like that) and I was
>>> unable to run the usual Python installer because it uses a GUI.
> 
> While I don't remember if I've actually tried it you should
> be able to do this with WMI. Example here...
> 
>    http://timgolden.me.uk/python/wmi_cookbook.html#install-a-product
> 
> If I have time to do it (and then undo whatever damage it
> does ;) I'll give it a go later.
> 
> TJG

Or, indeed, just run it in quiet mode, according to the docs:

   http://www.python.org/download/releases/2.5/msi/

TJG


From ptmcg at austin.rr.com  Thu Mar 29 10:06:17 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 29 Mar 2007 07:06:17 -0700
Subject: BeautifulSoup vs. Microsoft
In-Reply-To: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
References: <VkJOh.829$Q23.673@newssvr17.news.prodigy.net>
Message-ID: <1175177177.239473.69860@n59g2000hsh.googlegroups.com>

On Mar 29, 1:50 am, John Nagle <n... at animats.com> wrote:
> Here's a construct with which BeautifulSoup has problems.  It's
> from "http://support.microsoft.com/contactussupport/?ws=support".
>
> This is the original:
>
> <a href="http://www.microsoft.com/usability/enroll.mspx"
>      id="L_75998"
>      title="<!--http://www.microsoft.com/usability/information.mspx->"
>      onclick="return MS_HandleClick(this,'C_32179', true);">
>      Help us improve our products
> </a>
>
<snip>
>
> Strictly speaking, it's Microsoft's fault.
>
>      title="<!--http://www.microsoft.com/usability/information.mspx->"
>
> is supposed to be an HTML comment.  But it's improperly terminated.
> It should end with "-->".  So all that following stuff is from what
> follows the next "-->" which terminates a comment.
>

No, that comment is inside a quoted string, so it should be ok.

If you are just trying to extract <a href=...> tags, this pyparsing
scraper gets them, including this problematic one:


import urllib
from pyparsing import makeHTMLTags

pg = urllib.urlopen("http://support.microsoft.com/contactussupport/?
ws=support")
htmlSrc = pg.read()
pg.close()

# only take first tag returned from makeHTMLTags, not interested in
# closing </a> tags
anchorTag = makeHTMLTags("A")[0]

for a in anchorTag.searchString(htmlSrc):
    if "title" in a:
        print "Title:", a.title
        print "HREF:", a.href
        # or use this statement to dump the complete tag contents
        # print a.dump()
        print

Prints:
Title: <!--http://www.microsoft.com/usability/information.mspx->
HREF: http://www.microsoft.com/usability/enroll.mspx

Title: Print this page
HREF: /gp/noscript/

Title: Print this page
HREF: /gp/noscript/

Title: E-mail this page
HREF: mailto:?subject=Help%20and%20Support&amp;body=http%3a%2f
%2fsupport.microsoft.com%2fdefault.aspx%2fcontactussupport%2f%3fws
%3dsupport

Title: E-mail this page
HREF: mailto:?subject=Help%20and%20Support&amp;body=http%3a%2f
%2fsupport.microsoft.com%2fdefault.aspx%2fcontactussupport%2f%3fws
%3dsupport

Title: Microsoft Worldwide
HREF: /common/international.aspx?rdPath=0

Title: Microsoft Worldwide
HREF: /common/international.aspx?rdPath=0

Title: Save to My Support Favorites
HREF: /gp/noscript/

Title: Save to My Support Favorites
HREF: /gp/noscript/

Title: Go to My Support Favorites
HREF: /gp/noscript/

Title: Go to My Support Favorites
HREF: /gp/noscript/

Title: Send Feedback
HREF: /gp/noscript/

Title: Send Feedback
HREF: /gp/noscript/

-- Paul



From lbates at websafe.com  Mon Mar  5 12:47:06 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 05 Mar 2007 11:47:06 -0600
Subject: Newbie question
In-Reply-To: <mailman.4684.1173113802.32031.python-list@python.org>
References: <mailman.4684.1173113802.32031.python-list@python.org>
Message-ID: <45EC579A.8090602@websafe.com>

Tommy Grav wrote:
> Hi list,
> 
>    this is somewhat of a newbie question that has irritated me for a while.
> I have a file test.txt:
> 
> 0.3434  0.5322 0.3345
> 1.3435  2.3345 5.3433
> 
> and this script
> lines = open("test.txt","r").readlines()
> for line in lines:
>    (xin,yin,zin) = line.split()
>    x = float(xin)
>    y = float(yin)
>    z = float(zin)
> 
> Is there a way to go from line.split() to x,y,z as floats without
> converting
> each variable individually?
> 
> Cheers
>    Tommy


Using a list comprehension you would write this as:

for line in lines:
    xin, yin, zin=[float(x) for x in line.split()]

This if course expects your data to be perfect.  If
you want error handling (e.g. less or more than 3 values,
values that cause exception when passed to float, etc.)
you will have to handle that differently.

-Larry


From bdesth.quelquechose at free.quelquepart.fr  Tue Mar 20 17:26:03 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 20 Mar 2007 22:26:03 +0100
Subject: Exceptions when closing a file
In-Reply-To: <1174413925.474168.152570@p15g2000hsd.googlegroups.com>
References: <pan.2007.03.20.17.24.58.746758@REMOVE.THIS.cybersource.com.au>
	<1174413925.474168.152570@p15g2000hsd.googlegroups.com>
Message-ID: <460048f7$0$752$426a74cc@news.free.fr>

kyosohma at gmail.com a ?crit :
> On Mar 20, 12:25 pm, Steven D'Aprano
> <s... at REMOVE.THIS.cybersource.com.au> wrote:
> 
>>Closing a file can (I believe) raise an exception. Is that documented
>>anywhere? I've spent a lot of frustrating time trying to track this down,
>>with no luck, which suggests that either my google-foo is weak or that it
>>isn't documented. Is IOError the only exception it can raise?
>>
>>The only thing I have found is this:
>>
>>http://mail.python.org/pipermail/python-bugs-list/2004-November/02603...
>>
>>Out of curiosity, is there a simple way to demonstrate close() raising an
>>exception that doesn't involve messing about with disk quotas?
>>
>>--
>>Steven.
> 
> 
> I've never had any problems closing a file. Maybe you need to flush it
> before you close it?

Usually, closing the file flushes the buffer. At least with buffered 
files, but that's the most common situation AFAICT.

> Are you running threads that access the file in
> ad hoc fashion or something else out of the ordinary? Is this some
> sort of long running process writing a large file?

Might just be that there's no more available storage space.



From gkkvishnu at gmail.com  Sat Mar 31 14:54:24 2007
From: gkkvishnu at gmail.com (vishnu)
Date: Sun, 1 Apr 2007 00:24:24 +0530
Subject: Extending embedded python of multiple interpreters
Message-ID: <e3af21470703311154nbe3de1alf5b61733649570d4@mail.gmail.com>

Hello All,

I have embedded python 2.5 in to my C application. As we need the
python scripts to run in multi threaded environment I have used
Py_NewInterpreter() and Py_EndInterpreter each time I execute a run
script function.
The code is as follows:
RunScript(char *pScriptName,char *pFuncName,...)
{
PyEval_AcquireLock()
threadState = Py_NewInterpreter();
PyThreadState_Swap(threadState);

/* Import the script module and run the fnc in that script module */
Pyobject *pModule = PyImport_Import(pScriptName);
PyObject *pFunc = PyObject_GetAttrString(pModule, pFuncName);
....
/* End running the script and calling the script fnc */
Py_EndInterpreter(threadState);
PyEval_ReleaseLock();
}.

And my python initialise looks as :
pythonInit() {
Py_initialise();
PyEval_initThreads();//which enables multi thread support
}

Now I am extending the embedded python to expose my application
library API's to python using SWIG. I written one extension module and
from python i am setting the C structure member values which i
wrapped. I execute this python code using call to RunScript (above
function), it works fine for the first time, but from second time
onwards I get an error - Type Error : in method
<structurename_member>_set.
Hence my question is the same python code worked for first call, but
from 2nd call it is not working. Could any body help me where I am
making mistake.

Is extension modules does not work properly with multiple
interpreters? Does any body had this behaviour when worked with
extension modules and multiple interpreters creation for each thread.

Thanks in Advance for the help.

Vishnu


From adam at atlas.st  Mon Mar 26 15:21:32 2007
From: adam at atlas.st (Adam Atlas)
Date: 26 Mar 2007 12:21:32 -0700
Subject: Python C extension providing... Python's own API?
Message-ID: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>

Does anyone know if it would be possible to create a CPython extension
-- or use the ctypes module -- to access Python's own embedding API
(http://docs.python.org/api/initialization.html &c.)? Could a Python
program itself create a sub-interpreter, and work with it with all the
privileges and capabilities that an actual C program would have?

I realize that this may be a bit too... mystical? ... for a lot of
people's tastes, but I'm just curious if it's possible. :)



From hg at nospam.org  Wed Mar 28 05:54:29 2007
From: hg at nospam.org (hg)
Date: Wed, 28 Mar 2007 11:54:29 +0200
Subject: very strange syntax errors
Message-ID: <l4xOh.107071$ia7.61865@newsfe14.lga>

Hi,

I'v been facing some very strange errors lately:

one example:

def __init__(self):
....
        import my_info
        some_text = my_info.T_SOME_TEXT
                                      ^ syntax error


I manage to get rid of that one by moving the import on top of my file.

Note: Python 2.4.1 under Windows


Any clue ?

Thanks,

hg




From Graham.Dumpleton at gmail.com  Thu Mar  8 06:18:19 2007
From: Graham.Dumpleton at gmail.com (Graham.Dumpleton at gmail.com)
Date: 8 Mar 2007 03:18:19 -0800
Subject: Configuration: Apache + mod_python
In-Reply-To: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>
References: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>
Message-ID: <1173352699.270216.48800@s48g2000cws.googlegroups.com>

On Mar 8, 9:50 pm, "Danilo" <dbrab... at gmail.com> wrote:
> Hi there,
>
> is it possible to create a rewrite rule to send every server-request
> to the directory /py? But only if the file does not exists on the
> server.
>
> This is my mod_python section of the apache config-file.
>
> <Location "/py">
>         SetHandler python-program
>         PythonHandler django.core.handlers.modpython
>         PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
>         SetEnv DJANGO_SETTINGS_MODULE myapp.settings
>         PythonDebug Off
> </Location>

For the more general case of where a HTTP 404 error would otherwise be
returned, indicating that a resource could not be found, as opposed to
an actual physical file, you can just use:

  ErrorDocument 404 /py

This would be simpler than using mod_rewrite. I can't remember though
whether the handler when triggered in this case can change the
response status to something other than 404.

You could use mod_rewrite if you really must, but not sure how it
would interact with virtual resources managed by some handler where no
actual file exists. To be practical you would probably want to
restrict the scope of mod_rewrite to specific contexts.

Quoting an example from very good book "The Definitive Guide to Apache
mod_rewrite", you can do something similar to:

  RewriteEngine On
  # If its not here ...
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  # Look here instead ...
  RewriteRule ^/images/(.*) /pics/$1 [PT]

In this case it is causing lookups for images to be made in two
places, but your case wouldn't be much different.

Graham



From scott.daniels at acm.org  Wed Mar 14 01:19:08 2007
From: scott.daniels at acm.org (Scott David Daniels)
Date: Tue, 13 Mar 2007 21:19:08 -0800
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <SZHJh.38$07.36@newsfe12.lga>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
	<mailman.5045.1173827319.32031.python-list@python.org>
	<SZHJh.38$07.36@newsfe12.lga>
Message-ID: <12vf1cjtn2v6s0b@corp.supernews.com>

Bart Willems wrote:
> ...
> I always try to stay away from 'negative' operators if possible, to 
> improve readability:
> 
> while True:
>    hint = raw_input('\nAre you stuck? y/n: ').lower()
>    if hint = 'y' or hint = 'n':
>       break
>    else:
>       print 'Please answer yes or no'

And if you really want to see what is going wrong, replace that last by:
         print 'Please answer yes or no (not %r):' % hint

-- 
--Scott David Daniels
scott.daniels at acm.org


From deets at nospam.web.de  Tue Mar  6 08:53:29 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 Mar 2007 14:53:29 +0100
Subject: Python GUI + OpenGL
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
	<54r59qF228m8bU1@mid.uni-berlin.de>
	<slrneuo3lh.bth.f98dawa@shii.medic.chalmers.se>
	<552vcfF2339mvU1@mid.uni-berlin.de>
	<mailman.4686.1173115324.32031.python-list@python.org>
Message-ID: <555a2pF2399mcU1@mid.uni-berlin.de>

>> I didn't say so. I just pointed out an alternative, as the OP had issues
>> with obtaining binary packages for wx + py2.5
>>
> 
> I believe he was having trouble with binary packages for PyOpenGL,
> wxPython has 2.5 binaries and has since it was released.


Ah, I didn't read it that way as the OP didn't say exactly _what_ package he
was missing. Obviously if it's PyOpenGL then using Qt won't buy him much...


Diez


From ian at excess.org  Mon Mar 26 00:28:38 2007
From: ian at excess.org (Ian Ward)
Date: Mon, 26 Mar 2007 00:28:38 -0400
Subject: ANN: Urwid 0.9.8 - Console UI Library
Message-ID: <46074BF6.4030503@excess.org>

Announcing Urwid 0.9.8
----------------------

Urwid home page:
   http://excess.org/urwid/

Tarball:
   http://excess.org/urwid/urwid-0.9.8.tar.gz


About this release:
===================

This release improves Urwid's performance by 70% to 450% (reducing 
running time by 41% to 82%)[1] for some benchmarks[2].  New base classes 
have been introduced for widgets, canvases and list walkers.  Some bugs 
have been fixed.  Python 2.2 or later is now required.

There were three major changes that contributed to the performance 
improvement in this release.  The Canvas class was rewritten so that 
canvases can be combined more efficiently.  Canvas objects are now 
cached so that most unchanged widgets will not need to re-render 
themselves.  There is a new C module for some of the heavily used 
low-level string functions contributed by Rebecca Breu.

Urwid's raw_display module may now be used with libraries like Twisted 
that have their own event loops.  Use the new get_input_descriptors() 
and get_input_nonblocking() methods instead of get_input() when using an 
external event loop.

While I have tried to maintain compatibility with older versions of 
Urwid, some of the changes in this release may affect existing code. 
Please report any problems you have to the mailing list or the IRC channel.

[1] http://article.gmane.org/gmane.comp.lib.urwid/415
[2] http://excess.org/urwid/browser/contrib/trunk


New in this release:
====================

  * Rendering is now significantly faster.

  * New Widget base class for all widgets. It includes automatic caching
    of rows() and render() methods. It also adds a new __super attribute
    for accessing methods in superclasses.

    Widgets must now call self._invalidate() to notify the cache when
    their content has changed.

    To disable caching in a widget set the class variable no_cache to a
    list that includes the string "render".

  * Canvas classes have been reorganized: Canvas has been renamed to
    TextCanvas and Canvas is now the base class for all canvases. New
    canvas classes include BlankCanvas, SolidCanvas and CompositeCanvas.

  * External event loops may now be used with the raw_display module. The
    new methods get_input_descriptors() and get_input_nonblocking()
    should be used instead of get_input() to allow input processing
    without blocking.

  * The Columns, Pile and ListBox widgets now choose their first
    selectable child widget as the focus widget by defaut.

  * New ListWalker base class for list walker classes.

  * New Signals class that will be used to improve the existing event
    callbacks. Currently it is used for ListWalker objects to notify
    their ListBox when their content has changed.

  * SimpleListWalker now behaves as a list and supports all list
    operations. This class now detects when changes are made to the list
    and notifies the ListBox object. New code should use this class to
    wrap lists of widgets before passing them to the ListBox
    constructor.

  * New PollingListWalker class is now the default list walker that is
    used when passing a simple list to the ListBox constructor. This
    class is intended for backwards compatibility only. When this class
    is used the ListBox object is unable to cache its render() method.

  * The curses_display module can now draw in the lower-right corner of
    the screen.

  * All display modules now have start() and stop() methods that may be
    used instead of calling run_wrapper().

  * The raw_display module now uses an alternate buffer so that the
    original screen can be restored on exit. The old behaviour is
    available by seting the alternate_buffer parameter of start() or
    run_wrapper() to False.

  * Many internal string processing functions have been rewritten in C to
    improve their performance.

  * Compatible with Python >= 2.2. Python 2.1 is no longer supported.


About Urwid
===========

Urwid is a console UI library for Python. It features fluid interface
resizing, UTF-8 support, multiple text layouts, simple attribute markup,
powerful scrolling list boxes and flexible interface design.

Urwid is released under the GNU LGPL.






From klaus at seistrup.dk  Sat Mar 10 04:46:07 2007
From: klaus at seistrup.dk (Klaus Alexander Seistrup)
Date: Sat, 10 Mar 2007 09:46:07 +0000 (UTC)
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
Message-ID: <estuov$nmi$1@minji.szn.dk>

Raymond Hettinger wrote:

> To make the solutions equi-probable, a simple approach is to
> recursively enumerate all possibilities and then choose one 
> of them with random.choice().

Or create a list using the biased method, then use .shuffle() to 
return another permutation.

Cheers,

-- 
Klaus Alexander Seistrup
Tv-fri medielicensbetaler
http://klaus.seistrup.dk/


From psdasilvaX at esotericaX.ptX  Thu Mar  8 17:31:04 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Thu, 08 Mar 2007 22:31:04 +0000
Subject: Where to "import"?
In-Reply-To: <45f068a2$0$18256$426a74cc@news.free.fr>
References: <1173379952.901004@iceman.esoterica.pt>
	<45f068a2$0$18256$426a74cc@news.free.fr>
Message-ID: <1173393063.705376@jubilee.claranet.pt>

Bruno Desthuilliers escreveu:
> Paulo da Silva a ?crit :
...

>>
>> c.py
>>     class c:
>         class C(object):
> 
> 1/ better to stick to naming conventions (class names in CamelCase)
Ok. Thanks.
> 2/ do yourself a favor: use new-style classes
I still have python 2.4.3 (The gentoo current version).
I didn't find this in my tutorial. Would you please enlight me
a bit about this (class C(object))? Or just point me out some doc
to read about.

Thank you.
Paulo


From AWasilenko at gmail.com  Fri Mar 23 21:51:01 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 23 Mar 2007 18:51:01 -0700
Subject: except clause appears to be being skipped?
Message-ID: <1174701061.474974.97710@y80g2000hsf.googlegroups.com>

I can't figure out this problem Im having, I just can't understand why
it is ignoring the call I put in.  First the code (This is a cherrypy
website):

import sys, cherrypy, html

class Root:
	@cherrypy.expose
	def index(self, pageid = "Index"):
		selection = html.Page()
		return selection.makeit(dex = pageid)


cherrypy.config.update({'server.socket_port': 2572, 'log.screen':
False})
cherrypy.quickstart(Root())


If you're not familiar with cherrypy, whats going on here is its
pulling a variable from the url and just passing that to my page class
that I created.  The url would look like http://nonyaz.com/index?pageid=foo
and pageid would thus be foo.

and here is the class code stored in the html.py file that's causing
me all this grief:

class Page:
#Generic webpage assembler
	def __init__(self):
		#Open the header txt file for later use
		self.headertxt = open("pages/header.html","r")
		#self.footertxt = open("pages/footer.html","r")


	def makeit(self,dex=""):
		pagetitle, htmlbody = self.pager(dex)
		return self.headerinsert(pagetitle) + htmlbody


	def pager(self,dex):
	#Input page filename, Output pagetitle and the HTML output
		#Find out if the file requested actually exists
		try:
			j = dex + ".html"
			textfile = open("pages/" + j, "r")
		#If not 404' it
		except:
			self.err404(dex)

		#The first line in the .html files is the title, this reads that one
line
		pagetitle = textfile.readline()

		#Put the remaining lines of HTML into a var
		htmlbody = textfile.read()

		#Return the results
		return pagetitle,htmlbody

	def headerinsert(self,pagetitle):
	#Processes the header.html file for use.  Input a page title,
outputs
	#the compleated header with pagetitle inserted
		headerp1 = ""
		for i in range(5):
			headerp1 += self.headertxt.readline()
		headerp2 = self.headertxt.readline(7)
		headerp3 = self.headertxt.readline()
		headerp4 = self.headertxt.read()
		return headerp1 + headerp2 + str.strip(pagetitle) + headerp3 +
headerp4


	def err404(self,whatitis="N/A"):
	#Page not found error page
		return """<body bgcolor="#666666">
<br /><br /><br /><br /><br /><br /><br /><br /><br /><br /><br />
<center>Sorry the page <em>""" + str(whatitis) + """</em> does not
exist.<br />
<img src="/files/images/404.png" alt="Page cannot be found."></center>
</body>"""

This code does work when there is a valid page, aka when the try
statement executes with out exception.  The the exception is raised
for when there is no file, that's where the problems come in, I want
it just to call the err404 function and return my 404 page, but it
seems to act like its not there and keeps on going, giving me this
error:

Traceback (most recent call last):
  File "/home2/awasilenko/lib/python2.4/cherrypy/_cprequest.py", line
342, in respond
    cherrypy.response.body = self.handler()
  File "/home2/awasilenko/lib/python2.4/cherrypy/_cpdispatch.py", line
15, in __call__
    return self.callable(*self.args, **self.kwargs)
  File "/home2/awasilenko/webapps/cp/site.py", line 7, in index
    return selection.makeit(dex = pageid)
  File "/home2/awasilenko/webapps/cp/html.py", line 10, in makeit
    pagetitle, htmlbody = self.pager(dex)
  File "/home2/awasilenko/webapps/cp/html.py", line 25, in pager
    pagetitle = textfile.readline()
UnboundLocalError: local variable 'textfile' referenced before
assignment

I know the except is being executed because I put a break in there for
testing purposes and it did break, but as for why its not pulling up
the 404 function and returning the error page, I have no idea.



From dbhbarton at googlemail.com  Fri Mar  9 09:18:54 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 06:18:54 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <55d7t9F240tp2U1@mid.uni-berlin.de>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
Message-ID: <1173449933.926669.90810@n33g2000cwc.googlegroups.com>

On 9 Mar, 14:05, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> But you _can't_ profit from these conveniences, at least not the ?
> character. It's just garbage put in there for some others to interpret,
> meaningless to the interpreter. So it _always_ boils down to
> editor-support.

I'm sorry I don't follow your logic. Meaningless to the interpreter,
yes, meaningless to the IDE or to me, no. I "_can't_ profit from these
conveniences"? Why ever not?



From bwooster47 at gmail.com  Thu Mar  8 19:07:43 2007
From: bwooster47 at gmail.com (bwooster47 at gmail.com)
Date: 8 Mar 2007 16:07:43 -0800
Subject: Extend distutils bdist_rpm to support %config?
Message-ID: <1173398863.175468.73180@64g2000cwx.googlegroups.com>

Is there any way to get the functionality of the %config RPM directive
using python distutils?

http://www.rpm.org/max-rpm/s1-rpm-inside-files-list-directives.html

%config /etc/foonly

This will save the current file as fooonly.rpmsave if the file is
different from the one in the package, so users can prevent their
changes from being lost.

I looked at the distutils/command/bdist_rpm.py, it supports creation
of the %files keyword, but I did not see anything about %config,
presumably because distutils does not support that "config file
install" concept of RPM? Is there any other way to get this done using
distutils, for a setup.py that installs a python script (not a module)?



From jgodoy at gmail.com  Sun Mar  4 07:29:52 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 04 Mar 2007 09:29:52 -0300
Subject: SAMBA-PYTHON ???
References: <45eaaaf6$0$21150$7a628cd7@news.club-internet.fr>
Message-ID: <87odn942f3.fsf@gmail.com>

WEBER S?bastien <sebast.weber at wanadoo.fr> writes:

> (I'm french and I speak english like a spanish cow : sorry.)

(Shouldn't it be French cow?  Or you're more fluent in Spanish? ;-))

> Does someone know how to use the samba-python tdb.so module ? I've been
> looking for information about this on Google for 3 days and I've found not
> a word. The only functions I can use are 'open()' and 'first_key()' : not
> enough.

Did you get to run the examples supplied in the package?  I remember that I
had run these a while ago, but I don't remember if I had any problem (probably
not).  In the end I didn't use the package because the project changed
requirements and we adopted an alternative solution, but I got the examples to
run (or code very similar to them).

What are the errors that you're getting?  Send them to the group...

(BTW, I've used the samba-python package that comes with opensuse.) 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From thorsten at thorstenkampe.de  Sat Mar 31 18:01:33 2007
From: thorsten at thorstenkampe.de (Thorsten Kampe)
Date: Sat, 31 Mar 2007 23:01:33 +0100
Subject: I18n issue with optik
Message-ID: <MPG.2078ea9b701c87899896a1@news.individual.de>

Hi,

I've written a script which uses Optik/Optparse to display the 
options (which works fine). The text for the help message is localised 
(with german umlauts) and when I execute the script with the localised 
environment variable set, I get this traceback[1]. The interesting 
thing is that the localised optparse messages from displays fine - 
it's only my localisation that errors.

>From my understanding, my script doesn't put out anything, it's 
optik/optparse who does that. My po file is directly copied from the 
optik po file (who displays fine) and modified so the po file should 
be fine, too.

What can I do to troubleshoot whether the culprit is my script, optik 
or gettext?

Would it make sense to post the script and the mo or po files?


Thorsten

[1]
Traceback (most recent call last):
  File "script.py", line 37, in <module>
    options, args = cmdlineparser.parse_args()
  File "/usr/lib/python2.5/optparse.py", line 1378, in parse_args
    stop = self._process_args(largs, rargs, values)
  File "/usr/lib/python2.5/optparse.py", line 1418, in _process_args
    self._process_long_opt(rargs, values)
  File "/usr/lib/python2.5/optparse.py", line 1493, in 
_process_long_opt
    option.process(opt, value, values, self)
  File "/usr/lib/python2.5/optparse.py", line 782, in process
    self.action, self.dest, opt, value, values, parser)
  File "/usr/lib/python2.5/optparse.py", line 804, in take_action
    parser.print_help()
  File "/usr/lib/python2.5/optparse.py", line 1648, in print_help
    file.write(self.format_help().encode(encoding, "replace"))
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc4 in position 
264: ordinal not in range(128)


From mgi820 at motorola.com  Fri Mar 16 13:58:02 2007
From: mgi820 at motorola.com (Gary Duzan)
Date: Fri, 16 Mar 2007 17:58:02 +0000 (UTC)
Subject: distributing python software in jar like fashion
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<etbv8p$pg9$1@engnntp2.cig.mot.com>
	<wbzKh.10576$jx3.1929@newssvr25.news.prodigy.net>
Message-ID: <etelra$s01$1@engnntp2.cig.mot.com>

In article <wbzKh.10576$jx3.1929 at newssvr25.news.prodigy.net>,
John Nagle  <nagle at animats.com> wrote:
>     Were Python "eggs" a flop, or what?
>
>     We need to have one packager that everyone agrees on.
>Otherwise, installs become a mess, and then you have to have
>installers that handle multiple packagers.

   I think the point about Squisher is that you don't have to
install it. You can either import it or run it directly. I'm mostly
interested in it as a way to package a script with a few Python
and C modules, dump it in the field, and run "python myscript.pyc"
to execute it, with no need for anything but the base Python to be
installed on the remote site, and just one file to copy.

					Gary Duzan
					Motorola CHS




From aleax at mac.com  Sun Mar 18 22:05:33 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 19:05:33 -0700
Subject: * operator--as in *args?
References: <1174251225.056602.99810@n59g2000hsh.googlegroups.com>
	<1174254032.155494.228530@e65g2000hsc.googlegroups.com>
	<1174266469.127020.186120@l77g2000hsb.googlegroups.com>
	<1hv6o86.18ve0cc11prsg8N%aleax@mac.com>
	<mailman.5260.1174269168.32031.python-list@python.org>
Message-ID: <1hv6q48.1iuluko16x5ekgN%aleax@mac.com>

Gabriel Genellina <gagsl-py2 at yahoo.com.ar> wrote:
   ...
> > As far as it goes, yes.  More generally, with any iterable x, the *x
> > construct in function call will pass as positional arguments exactly
> > those items which (e.g.) would be printed by the loop:
> >     for item in x: print x
> >
> > [[this applies to iterators, generators, genexps, and any other iterable
> > you may care to name -- not just lists, tuples, dicts, but also sets,
> > files open for reading [the items are the lines], etc, etc]].
> 
> But the language reference says "sequence", not "iterable"  

Yes, Python's docs often say "sequence" where they in fact mean
"iterable".  I count (on all the .tex files under Doc/ in a current SVN
tree) 854 occurrences of "sequence" versus 251 occurrences of
"iterable", and I suspect the correct ratio would be rather close to the
reverse:-).

> If allowing f(*d) is actually the intended behavior, maybe the wording in
> the reference should be updated. If not, f(*d) should still raise an error.

Patches to the docs will doubtlessly be welcome (though fixing 1 out of
a suspected 600 or so misuses won't make a huge difference, it's still
definitely better than nothing:-).


Alex


From julius.welby at gmail.com  Fri Mar 23 05:28:10 2007
From: julius.welby at gmail.com (jwelby)
Date: 23 Mar 2007 02:28:10 -0700
Subject: python on window
In-Reply-To: <1174641916.227042.224500@o5g2000hsb.googlegroups.com>
References: <1174634752.580051.272560@l75g2000hse.googlegroups.com>
	<1174641916.227042.224500@o5g2000hsb.googlegroups.com>
Message-ID: <1174642090.293137.231730@d57g2000hsg.googlegroups.com>

That should have been:

"You should be able edit your PYTHONPATH variable (should you need
to)..."

Gabiel is right, it's not usually required.



From tom.rectenwald at eglow.net  Wed Mar 14 12:37:36 2007
From: tom.rectenwald at eglow.net (tereglow)
Date: 14 Mar 2007 09:37:36 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <pan.2007.03.14.15.57.44.398564@gmx.net>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<mailman.5076.1173876678.32031.python-list@python.org>
	<et8u0e$k2a$1@news2.u-psud.fr>
	<pan.2007.03.14.15.57.44.398564@gmx.net>
Message-ID: <1173890256.024442.138840@e1g2000hsg.googlegroups.com>

On Mar 14, 11:57 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <et8u0e$k2... at news2.u-psud.fr>, Laurent Pointal wrote:
>
> > Steve Holden a ?crit :
> >> Regular expressions aren't really needed here. Untested code follows:
>
> >> for line in open('/proc/meminfo').readlines:
> > for line in open('/proc/meminfo').readlines():
>
> for line in open('/proc/meminfo'):
>
> >>     if line.startswith("Memtotal:"):
> >>         name, amt, unit = line.split()
> >>         print name, amt, unit
> >>         break
>
> Of course it's cleaner to assign the file object to a name and close the
> file explicitly after the loop.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

Thanks all for the help with this, am learning a lot; really
appreciate it.
Tom



From cjw at sympatico.ca  Fri Mar  9 08:13:35 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Fri, 09 Mar 2007 08:13:35 -0500
Subject: pylint: don't warn about tabs
In-Reply-To: <874povzbuw.fsf@benfinney.id.au>
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<874povzbuw.fsf@benfinney.id.au>
Message-ID: <esrmi7$3nn$1@sea.gmane.org>

Ben Finney wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
> 
>> Alan Isaac wrote:
>>> As a tab user, I want the tabs warning turned off.
>> Advice: Don't.
> 
> Agreed. Sticking to spaces for indentation avoids the ambiguity of
> interpretation that ASCII TAB characters are subject to. In addition,
> PEP 8 (which many people consider a strong suggestion for a style
> guide for all Python code) recommends four space characters for
> indentation.
For those who prefer say 3 or 8, pylint permits this to be specified in 
the configuration file.

Colin W.
> 
>> IIRC it's planned in future Python versions that TABs aren't
>> supported for indentation.
> 
> I've not seen such plans, can you support that?
> 
> If you're thinking of this post from Guido, please note the date it
> was made:
> 
>     <URL:http://www.artima.com/weblogs/viewpost.jsp?thread=101968>
> 



From israphelr at googlemail.com  Fri Mar  9 16:33:57 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 9 Mar 2007 13:33:57 -0800
Subject: Need help with a string plz! (newbie)
In-Reply-To: <pan.2007.03.09.21.29.07.201983@gmx.net>
References: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>
	<pan.2007.03.09.21.29.07.201983@gmx.net>
Message-ID: <1173476037.284461.211990@8g2000cwh.googlegroups.com>

On Mar 9, 9:29 pm, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <1173475520.292989.239... at p10g2000cwp.googlegroups.com>, israphelr
> wrote:

> In [57]: 'reversed string'[::-1]
> Out[57]: 'gnirts desrever'


Sorry, I didn't understand this.




From sgeiger at ncee.net  Mon Mar 19 12:55:08 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Mon, 19 Mar 2007 11:55:08 -0500
Subject: check if files are the same on Windows
In-Reply-To: <1174320587.618875.48290@y66g2000hsf.googlegroups.com>
References: <1174320587.618875.48290@y66g2000hsf.googlegroups.com>
Message-ID: <45FEC06C.9030706@ncee.net>

In the unix world, 'fc' would be like diff.

"""
Python example of checksumming files with the MD5 module.

In Python 2.5, the hashlib module would be preferable/more elegant.
"""

import md5

import string, os
r = lambda f: open(f, "r").read()
def readfile(f,strip=False): return (strip and stripper(r(f))) or r(f)
def writefile(f, data, perms=750): open(f, "w").write(data) and 
os.chmod(f, perms)

def get_md5(fname):
    hash = md5.new()
    contents = readfile(fname)
    hash.update(contents)
    value = hash.digest()
    return (fname, hash.hexdigest())

import glob

for f in glob.glob('*'):
    print get_md5(f)



> A crude way to check if two files are the same on Windows is to look
> at the output of the "fc" function of cmd.exe, for example
>
> def files_same(f1,f2):
>     cmnd    = "fc " + f1 + " " + f2
>     return ("no differences" in popen(cmnd).read())
>
> This is needlessly slow, because one can stop comparing two files
> after the first difference is detected. How should one check that
> files are the same in Python? The files are plain text.
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar  3 02:07:25 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sat, 03 Mar 2007 08:07:25 +0100
Subject: Perl and Python, a practical side-by-side example.
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45e8c931$0$8646$426a34cc@news.free.fr>
Message-ID: <54sl5dF21mn73U1@mid.individual.net>

Bruno Desthuilliers wrote:
> Shawn Milo a ?crit :

>>     if recs.has_key(piid) is False:
> 
> 'is' is the identity operator - practically, in CPython, it
> compares memory addresses. You *dont* want to use it here.

It's recommended to use "is None"; why not "is False"? Are there
multiple False instances or is False generated somehow?

Regards,


Bj?rn

-- 
BOFH excuse #135:

You put the disk in upside down.



From grante at visi.com  Tue Mar 13 13:18:33 2007
From: grante at visi.com (Grant Edwards)
Date: Tue, 13 Mar 2007 17:18:33 -0000
Subject: Communicating with a DLL under Linux
References: <mailman.5023.1173805183.32031.python-list@python.org>
Message-ID: <12vdn79jjds6a71@corp.supernews.com>

On 2007-03-13, Mikael Olofsson <mikael at isy.liu.se> wrote:

> The gadget costs about 50 Euros. It's not a lot of money, but I would 
> not like to buy the thing if there is a substancial risk that I will not 
> be able to make it work on that computer. From what I've read on the 
> box, it assumes Windows (a number of versions), it includes a DLL to 
> communicate with it, and example code in VB (iirc). For the interested, 
> here's the gadget:
>
>     http://www.elfa.se/elfa-bin/dyndok.pl?lang=en&vat=0&dok=9001.htm
>
> I have been looking at ctypes, and from what I read, I should be able to 
> communicate with a DLL by using ctypes.

Only under Windows.

> It even sounds fairly easy, as long as I know what the DLL is
> supposed to do. I expect there to be some kind of manual for
> the DLL included in the box. Are DLLs universal, or are there
> different DLLs for Windows and Linux (I'm not a programmer, 
> remember)?

Yes.  Shared libraries (Called DLLs under Windows) are
different than shared libraries under Linux.

> If the vendor claims that the DLL is for Windows, is it
> reasonable to assume that it can be made to work under Linux

No.

> from Python, that is? Or is this perhaps completely out
> of the question?

It's probably out of the question.

-- 
Grant Edwards                   grante             Yow!  I am NOT a nut....
                                  at               
                               visi.com            


From cga2000 at optonline.net  Sat Mar 24 13:50:51 2007
From: cga2000 at optonline.net (cga2000)
Date: Sat, 24 Mar 2007 12:50:51 -0500
Subject: Mastering Python
In-Reply-To: <1174271932.463826.106290@n59g2000hsh.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
	<1174055241.079644.160750@e1g2000hsg.googlegroups.com>
	<1174271932.463826.106290@n59g2000hsh.googlegroups.com>
Message-ID: <20070324175051.GD1413@turki.gavron.org>

On Sun, Mar 18, 2007 at 09:38:52PM EST, Paul McGuire wrote:
> On Mar 16, 9:27 am, "BartlebyScrivener" <rpdool... at gmail.com> wrote:
> > On Mar 16, 8:39 am, "Paul McGuire" <p... at austin.rr.com> wrote:
> >
> >
> >
> > > Wow, are you still reading?  Quit wasting time and go download a
> > > Python dist and get started already!
> >
> > I think you should extract that and spend twenty minutes tidying it up
> > and then publish it to the Python for Programmers page or make it a
> > downloadable .pdf.
> >
> > http://wiki.python.org/moin/BeginnersGuide/Programmers
> >
> > rd
> >
> >  "The chief contribution of Protestantism to human thought is its
> >   massive proof that God is a bore."
> >
> >   --H.L. Mencken
> 
> I've added it to this page, see the last entry.  Hope some find it
> entertaining, if not informative.

Nice job.

Thanks,
cga


From duncan.booth at invalid.invalid  Thu Mar  8 11:25:55 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 8 Mar 2007 16:25:55 GMT
Subject: Tell me the truth
References: <mailman.4803.1173370150.32031.python-list@python.org>
Message-ID: <Xns98EDA7205C264duncanbooth@127.0.0.1>

francois.petitjean at bureauveritas.com wrote:

> After much head scrating and experimenting with dis.dis() I have found
> that chaining comparisons (with is or ==)  a == b == c in Python is
> never a good idea. It is interpreted as
>  ( a == b ) and ( b == c)
> Such a magic is fine  when we write:
>  if  0.0 <= x < 1.0:
> but it renders the outcome of  if a == b == c: somewhat confusing.

I don't understand why it is confusing. What other meaning would you 
expect?


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 18:35:02 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 00:35:02 +0100
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
	<1173131863.216300.109120@s48g2000cws.googlegroups.com>
	<9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>
Message-ID: <45eca130$0$28890$426a74cc@news.free.fr>

Stef Mientki a ?crit :
> Adam Atlas wrote:
> 
>> Ah... heh, sorry, I misread your message as "a much more convenient
>> way" rather than "much more than a convenient way". Anyway, I
>> understand that, and I do indeed find setuptools useful and use it on
>> a regular basis.
>>
>> But my other points still stand. This would be a moot point if
>> setuptools were part of the standard library, but it's not, and I
>> don't see why people should have to bother installing it if they
>> simply want to try a small package. Look at Beautiful Soup, for
>> example. It's distributed as a single .py file, and that's great. With
>> most modules, all I want to do is download them and plop them into my
>> project directory. You can always copy it into site-packages if you
>> want to access it globally, and you can always unzip it if you need to
>> see the source.
>>
>> So I *will* retract my statement that this could be an "alternative"
>> to eggs -- ideally, it would be an addition, since it doesn't break
>> compatibility at all. You could download an egg and rename it to .pyc,
>> and import it like any other module, and at any point later, you could
>> rename it back to .egg and use setuptools to install it if you wish.
>>
> Good point to make these things much easier!
> 
> But possibly I'm the only Windows user here,

I don't think so.

> as I still find these talks all very difficult to understand,
> and I really don't understand why all this complexity is necessary,
> setuptools ? eggs ? zips ? pythonpaths ?
> 
> As a normal Windows user,
>   I'm used to run an install file,
>     and hit just 1 button.

As a normal *n*x user, I'm used to run a single command line. Don't even 
have to hit a button !-)

> But I guess the needed complexity is all thanks to NIX ;-)

FUD.


From supervau at gmail.com  Tue Mar 13 02:32:31 2007
From: supervau at gmail.com (Frank)
Date: 12 Mar 2007 23:32:31 -0700
Subject: Calling cpp from python/SWIG
Message-ID: <1173767551.082505.206120@30g2000cwc.googlegroups.com>

Hi,

I have the following problem:

I want to parse an array M1 from python to a cpp function fct which
returns an array M2.

How can I do this best? Is SWIG appropriate or is there something
else?

If someone could give some code example or a link to a page with
examples, that would be great!

Thanks to all!

Frank



From bdesth.quelquechose at free.quelquepart.fr  Mon Mar 12 16:33:43 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 12 Mar 2007 21:33:43 +0100
Subject: glob.glob output
In-Reply-To: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
References: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
Message-ID: <45f5b0f7$0$9689$426a74cc@news.free.fr>

Hitesh a ?crit :
> import string
> import os
> 
> f = open ("c:\\servername.txt", 'r')
> linelist = f.read()
> 
> lineLog = string.split(linelist, '\n')
> lineLog = lineLog [:-1]
> #print lineLog
> for l in lineLog:
>     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
>     glob.glob(path1)

And ? What are you doing then with return value of glob.glob ?


BTW, seems like an arbitrarily overcomplicated way to do:

from glob import glob
source = open(r"c:\\servername.txt", 'r')
try:
   for line in source:
     if line.strip():
       found = glob(r"\\%s\server*\*\xtRec*" % line)
       print "\n".join(found)
finally:
   source.close()

> When I run above from command line python, It prints the output of
> glob.glob
> but when I run it as a script, it does not print
> anything....

Not without an explicit print statement. This behaviour is useful in the 
interactive python shell, but would be really annoying in normal use.

> I know that there are files like xtRec* inside those
> folders.. and glob.glob does spits the path if run from python command
> line.
> 
> I tried something like this but did not work:
> for l in lineLog:
>     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
>     xtRec = glob.glob(path1)
>     print xtRec
> 
> No results...

With the same source file, on the same filesystem ? Unless your xtRec* 
files have been deleted between both tests you should have something here.

> xtRec = []
> for l in lineLog:
>     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
>     xtrec = glob.glob(path1)

You're rebinding xtRec each turn. This is probably not what you want.


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Mon Mar  5 13:51:59 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Mon, 05 Mar 2007 19:51:59 +0100
Subject: New to Python
References: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
Message-ID: <55376fF231fg0U1@mid.individual.net>

dnwurtz at gmail.com wrote:

> I am trying to get a program to add up input from the user to get
> to the number 100 using a loop.  However, I am having some issues. 

Please, if you have a problem post the exact error symptoms.

> Here is what I have so far.  I know I am just trying to hard, but
> I am stuck.  Thank you for any help.

We can't tell by magic where you are stuck. Please state observed
and expected behaviour.

> print "We need to count to 100"
> 
> high_number = 100
> total = 0
> 
> number = input("Enter your first number ")

(already mentioned: please don't use input)

> sum = number + total

This is a one-time assignment.

> while sum < high_number:
>     print "Not there yet..."
>     number = input("Enter another number ")
> 
> print "We are there!!!"

"We" won't reach this point since the while condition never becomes
False. See above; "sum" is assigned just one time and will not
change in your while loop. Having the program work as probably
expected requires a "sum += number" inside the while loop.

BTW, what's "total" expected to do? It's also assigned only one
time.

Regards,


Bj?rn

-- 
BOFH excuse #150:

Arcserve crashed the server again.



From jjl at pobox.com  Sat Mar 10 20:31:17 2007
From: jjl at pobox.com (John J. Lee)
Date: Sun, 11 Mar 2007 01:31:17 GMT
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
Message-ID: <878xe4zhud.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:

> John J. Lee wrote:
> > John Nagle <nagle at animats.com> writes:
> > [...]
> >
> >>    Python, on the other hand, is uphill all the way.  Constant trouble
> >>with version issues, especially with C components called from Python.
> >>MySQLdb, M2Crypto, SSL - they all have platform/version
> >>incompatibility problems.  I just spent three days making M2Crypto
> >>work on a new Linux server with a different Red Hat version.
> >>Neither Python's packaging tools nor the platform's packaging
> >>tools deal adequately with these issues.
> > [...]
> > You haven't been using mod_python, by any chance?
> > John
> 
>     No, haven't started to deal with that yet.  Still using
> CGI.  Not sure whether to use mod_python or fastcgi for the
> small requests where the Python load time swamps the time
> to do one SQL select and reply.  Comments?

mod_python relies on an unsupported feature of Python, namedly
multiple interpreters --> risk of more pain with C extensions.


John


From tiedon_jano at hotmail.com  Sat Mar  3 12:53:01 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Sat, 03 Mar 2007 17:53:01 GMT
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <mailman.4614.1172875489.32031.python-list@python.org>
References: <mailman.4614.1172875489.32031.python-list@python.org>
Message-ID: <1CiGh.254$Dg7.71@read3.inet.fi>

Shawn Milo kirjoitti:
> <snip> 
> I am not looking for the smallest number of lines, or anything else
> that would make the code more difficult to read in six months. Just
> any instances where I'm doing something inefficiently or in a "bad"
> way.
> 
> I'm attaching both the Perl and Python versions, and I'm open to
> comments on either. The script reads a file from standard input and
> finds the best record for each unique ID (piid). The best is defined
> as follows: The newest expiration date (field 5) for the record with
> the state (field 1) which matches the desired state (field 6). If
> there is no record matching the desired state, then just take the
> newest expiration date.
> 

I don't know if this attempt satisfies your criteria but here goes!

This is not a rewrite of your program but was created using your problem
description above. I've not included the reading of the data because it 
has not much to do with the problem per se.

#============================================================
input = [
     "aaa\tAAA\t...\t...\t...\t20071212\tBBB\n",
     "aaa\tAAA\t...\t...\t...\t20070120\tAAA\n",
     "aaa\tAAA\t...\t...\t...\t20070101\tAAA\n",
     "aaa\tAAA\t...\t...\t...\t20071010\tBBB\n",
     "aaa\tAAA\t...\t...\t...\t20071111\tBBB\n",
     "ccc\tAAA\t...\t...\t...\t20071201\tBBB\n",
     "ccc\tAAA\t...\t...\t...\t20070101\tAAA\n",
     "ccc\tAAA\t...\t...\t...\t20071212\tBBB\n",
     "ccc\tAAA\t...\t...\t...\t20071212\tAAA\n",
     "bbb\tAAA\t...\t...\t...\t20070101\tAAA\n",
     "bbb\tAAA\t...\t...\t...\t20070101\tAAA\n",
     "bbb\tAAA\t...\t...\t...\t20071212\tAAA\n",
     "bbb\tAAA\t...\t...\t...\t20070612\tAAA\n",
     "bbb\tAAA\t...\t...\t...\t20071212\tBBB\n",
     ]

input = [x[:-1].split('\t') for x in input]
recs = {}
for row in input:
     recs.setdefault(row[0], []).append(row)

for key in recs:
     rows = recs[key]
     rows.sort(key=lambda x:x[5], reverse=True)
     for current in rows:
         if current[1] == current[6]:
             break
     else:
         current = rows[0]
     print '\t'.join(current)
#============================================================


The output is:

aaa	AAA	...	...	...	20070120	AAA
bbb	AAA	...	...	...	20071212	AAA
ccc	AAA	...	...	...	20071212	AAA

and it is the same as the output of your original code on this data.
Further testing would naturally be beneficial.

Cheers,
Jussi


From claird at lairds.us  Sun Mar 25 12:43:57 2007
From: claird at lairds.us (Cameron Laird)
Date: Sun, 25 Mar 2007 16:43:57 +0000
Subject: Tkinter Toplevel geometry
References: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>
	<0dtNh.9164$JZ3.2879@newssvr13.news.prodigy.net>
	<hytNh.9165$JZ3.6207@newssvr13.news.prodigy.net>
	<1174824649.683426.78990@d57g2000hsg.googlegroups.com>
Message-ID: <dflid4-975.ln1@lairds.us>

In article <1174824649.683426.78990 at d57g2000hsg.googlegroups.com>,
Chris <ceball at gmail.com> wrote:
>
>> After playing with this an inordinate amount of time, I found that one
>> does need to supply parameters, namely the null parameter of an empty
>> string. Try:
>>
>>    sometop.geometry('')
>>
>> This repacks according to the widgets. Not quite clear from the
>> miserable docs, is it?
>
>
>Wow, that does work. Thank you very much for figuring it out!
>

A TRULY good way to show your thanks for help like this
is to write up what you learned at the Tkinter Wiki <URL:
http://tkinter.unpythonic.net/wiki/ >.  Note:
A.  You have to log in to edit pages
    on this particular Wiki.  If you
    decide to join us, then, you'll
    first need to create an account.

    Read-only visitors can be anony-
    mous, of course.
B.  Major thanks to Jeff Epler for
    maintaining the site, and, in 
    particular, for fighting off 
    recent vandalism.


From bj_666 at gmx.net  Sun Mar  4 06:29:39 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Sun, 04 Mar 2007 12:29:39 +0100
Subject: multiple content-types break cgi.py
References: <1173002603.690853.250090@p10g2000cwp.googlegroups.com>
	<slrneul7rs.t3l.jon+usenet@snowy.squish.net>
Message-ID: <pan.2007.03.04.11.29.39.394190@gmx.net>

In <slrneul7rs.t3l.jon+usenet at snowy.squish.net>, Jon Ribbens wrote:

> It's not a bug - sending multiple content-types is just totally broken.
> What would such a header even be supposed to mean? It's like saying
> "this is an apple orange".

And the correct header for such a beast would be "this is an iOrange" of
course.  ;-)

SCNR,
	Marc 'BlackJack' Rintsch


From aleax at mac.com  Sun Mar  4 10:54:23 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 4 Mar 2007 07:54:23 -0800
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1173009806.383478.50230@i80g2000cwc.googlegroups.com>
Message-ID: <1hufw45.os60h3bkuqh9N%aleax@mac.com>

goodwolf <Robert.Katic at gmail.com> wrote:
   ...
> Then you will prefer something like this:
> 
> class Namespace(object):
>     def __init__(self, __ns={}, **kwargs):
>         if kwargs: __ns.update(kwargs)
>         self.__dict__ = __ns

I might, if it weren't for the redundant "if" and the horribly buggy
interference between separate instances -- which is why I wrote it,
almost six years ago and without the bugs, as
<http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52308> .

Not much later, in the printed Cookbook, I also gave some other good
ways and explained (as I did in the current thread) why confusing
attributes and items, as proposed in most of this thread, is really a
bad idea.


Alex


From mscottschilling at hotmail.com  Fri Mar 30 13:19:14 2007
From: mscottschilling at hotmail.com (Mike Schilling)
Date: Fri, 30 Mar 2007 17:19:14 GMT
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<Fo2Ph.12350$Um6.9109@newssvr12.news.prodigy.net>
	<460cc83a.2652073@news.readfreenews.net>
Message-ID: <mEbPh.10505$JZ3.8847@newssvr13.news.prodigy.net>

Timofei Shatrov wrote:
> On Fri, 30 Mar 2007 06:48:05 GMT, "Mike Schilling"
> <mscottschilling at hotmail.com> tried to confuse everyone with this
> message:
>
>> Xah Lee wrote:
>>
>>> So, a simple code like this in normal languages:
>
>>> becomes in Java:
>>>
>>>
>>
>> Only when written by someone almost entirely ignorant of Java.
>>
>
> Which is the state most people want to be in...

Most of them have the brains not to display their ignorance so widely. 




From steve at holdenweb.com  Thu Mar 22 05:48:57 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 05:48:57 -0400
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <ettgei$rki$1@news2.zwoll1.ov.home.nl>
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
Message-ID: <ettjgr$8is$1@sea.gmane.org>

Anton Vredegoor wrote:
> Steven D. Arnold wrote:
> 
[...]
> /rant
> 
Feel better now?

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From laurent.pointal at limsi.fr  Wed Mar 28 07:01:18 2007
From: laurent.pointal at limsi.fr (Laurent Pointal)
Date: Wed, 28 Mar 2007 13:01:18 +0200
Subject: XML Parsing
In-Reply-To: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
References: <1175067518.919256.243090@n59g2000hsh.googlegroups.com>
Message-ID: <eudhtd$lfo$1@news2.u-psud.fr>

pyapplico at gmail.com a ?crit :
> I want to parse this XML file:
<zip>
> As you might have guessed, I want to create files from this XML file
> contents, so how can I do this?
> What modules should I use? What options do I have? Where can I find
> tutorials? Will I be able to put
> this on the internet (on a googlepages server)?

See urllib2 module and its "missing guide".

> Thanks in advance to everyone who helps me.
> And yes I have used Google but I am unsure what to use.
> 

About XML, to complete Amit link to ElementsTree, you may take a look at:

http://www.diveintopython.org/xml_processing/index.html
		(learn by example)

And look at:
http://pyxml.sourceforge.net/
http://www.rexx.com/~dkuhlman/pyxmlfaq.html
http://shellsage.com/?q=node/12
http://www.python.org/community/sigs/current/xml-sig/
http://docs.python.org/lib/markup.html


From george.trojan at noaa.gov  Thu Mar  1 12:54:44 2007
From: george.trojan at noaa.gov (George Trojan)
Date: Thu, 01 Mar 2007 12:54:44 -0500
Subject: Dialog with a process via subprocess.Popen blocks forever
In-Reply-To: <1172770920.052040.33990@h3g2000cwc.googlegroups.com>
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4569.1172751469.32031.python-list@python.org>
	<1172770920.052040.33990@h3g2000cwc.googlegroups.com>
Message-ID: <es7415$4gn$1@news.nems.noaa.gov>

bayer.justin at googlemail.com wrote:
> Okay, here is what I want to do:
> 
> I have a C Program that I have the source for and want to hook with
> python into that. What I want to do is: run the C program as a
> subprocess.
> The C programm gets its "commands" from its stdin and sends its state
> to stdout. Thus I have some kind of dialog over stdin.
> 
> So, once I start the C Program from the shell, I immediately get its
> output in my terminal. If I start it from a subprocess in python and
> use python's sys.stdin/sys.stdout as the subprocess' stdout/stdin I
> also get it immediately.
> 
> BUT If I use PIPE for both (so I can .write() on the stdin and .read()
> from the subprocess' stdout stream (better: file descriptor)) reading
> from the subprocess stdout blocks forever. If I write something onto
> the subprocess' stdin that causes it to somehow proceed, I can read
> from its stdout.
> 
> Thus a useful dialogue is not possible.
> 
> Regards,
> -Justin
> 
> 
> 
Have you considered using pexpect: http://pexpect.sourceforge.net/ ?

George


From steve at REMOVE.THIS.cybersource.com.au  Sat Mar 10 08:38:31 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 11 Mar 2007 00:38:31 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<mailman.4897.1173522747.32031.python-list@python.org>
Message-ID: <pan.2007.03.10.13.38.30.791542@REMOVE.THIS.cybersource.com.au>

On Sat, 10 Mar 2007 02:32:21 -0800, Dick Moores wrote:

> So why not just repeatedly call a function to generate lists of 
> length N of random integers within the appropriate range (the closed 
> interval [1,M-N-1]), and return the first list the sum of which is M? 
> I don't understand what all the discussion is about. Time is not one 
> of the constraints.

Time is always a constraint. The sun will expand and destroy the Earth in
a couple of billion years, it would be nice to have a solutions before
then... 

*wink*

Seriously, almost all programming problems have two implicit constraints:
it must run as fast as practical, using as little computer resources (e.g.
memory) as practical. Naturally those two constraints are usually in
opposition, which leads to compromise algorithms that run "fast enough"
without using "too much" memory.



-- 
Steven.



From gtcopeland at gmail.com  Thu Mar  8 16:19:45 2007
From: gtcopeland at gmail.com (Greg Copeland)
Date: 8 Mar 2007 13:19:45 -0800
Subject: SQLAlchemy and Oracle Functions?
Message-ID: <1173388785.133560.146300@p10g2000cwp.googlegroups.com>

I'm using SQLAlchemy and have a need to call an Oracle function; which
is not the same as a stored procedure.  Can this be done directory or
indirectly with SQLAlchemy?  If so, can someone please provide an
example?  If not, how do I obtain the raw cx_Oracle cursor so I can
use callfunc directly on that?

Thanks,

Greg



From mahs at telcopartners.com  Wed Mar 28 18:01:00 2007
From: mahs at telcopartners.com (Michael Spencer)
Date: Wed, 28 Mar 2007 15:01:00 -0700
Subject: manually implementing staticmethod()?
References: <1175115664.288706.183390@p77g2000hsh.googlegroups.com>
Message-ID: <eueoiv$iko$1@sea.gmane.org>


"7stud" <bbxx789_05ss at yahoo.com> wrote in message 
news:1175115664.288706.183390 at p77g2000hsh.googlegroups.com...
> Hi,
>
> Can someone show me how to manually implement staticmethod()?  Here is
> my latest attempt:
> ----------------
Raymond Hettinger can:

http://users.rcn.com/python/download/Descriptor.htm#static-methods-and-class-methods






From Graham.Dumpleton at gmail.com  Sat Mar 10 21:45:25 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: 10 Mar 2007 18:45:25 -0800
Subject: merits of Lisp vs Python
In-Reply-To: <878xe4zhud.fsf@pobox.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
Message-ID: <1173581125.663707.5810@s48g2000cws.googlegroups.com>

On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
> John Nagle <n... at animats.com> writes:
> > John J. Lee wrote:
> > > John Nagle <n... at animats.com> writes:
> > > [...]
>
> > >>    Python, on the other hand, is uphill all the way.  Constant trouble
> > >>with version issues, especially with C components called from Python.
> > >>MySQLdb, M2Crypto, SSL - they all have platform/version
> > >>incompatibility problems.  I just spent three days making M2Crypto
> > >>work on a new Linux server with a different Red Hat version.
> > >>Neither Python's packaging tools nor the platform's packaging
> > >>tools deal adequately with these issues.
> > > [...]
> > > You haven't been usingmod_python, by any chance?
> > > John
>
> >     No, haven't started to deal with that yet.  Still using
> > CGI.  Not sure whether to usemod_pythonor fastcgi for the
> > small requests where the Python load time swamps the time
> > to do one SQL select and reply.  Comments?
>
> mod_pythonrelies on an unsupported feature of Python, namedly
> multiple interpreters --> risk of more pain with C extensions.

As usual, those bashing up on mod_python tend not to really know what
they are talking about. :-(

Although multiple Python interpreters cannot be manipulated directly
from within a Python script, they can from the Python C API and it is
very much a feature of Python and has been for a long time.

The only issue with multiple sub interpreters in respect of C
extension modules is that implementers of those C extension modules
take the easy path and use the simplified thread API for GIL locking.
The consequence of them doing that is that their C extension module
may not work when used in anything but the first interpreter created
by Python. If instead of using the simplified thread API for GIL
locking they used other parts of the Python threading API as
appropriate and did thread lock handling properly for multiple
interpreters, there would not be an issue.

Even so, to get such a C extension module working in the context of
mod_python simply means telling mod_python to run that particular
application in the first interpreter instance by specifying the
mod_python directive:

  PythonInterpreter main_interpreter

Thus, the problem is not mod_python at all, but that the C extension
modules implementer didn't bother to implement their module so as to
be usable within a system such as mod_python where multiple
interpreters are used. Further, mod_python even provides a way to work
around the problems with such third party C extension modules.

If you feel that this is not the case and mod_python is still broken
in some way, please properly explain what the problem is.

PS. Yes I do know that forcing using of main interpreter in mod_python
only helps solve this problem in mod_python 3.2 and later and did not
help with older versions.

Graham



From gagsl-py2 at yahoo.com.ar  Mon Mar 19 19:25:05 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 19 Mar 2007 20:25:05 -0300
Subject: struct.pack returns nothing [3]
References: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>
	<op.tpgixokfx6zn5v@gabriel2.softlabbsas.com.ar>
	<20070319223241.GA21961@mail.lacordilleraandina.com.ar>
Message-ID: <op.tpglz3qmx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 19 Mar 2007 19:32:41 -0300, Andr?s Martinelli  
<andres at lacordilleraandina.com.ar> escribi?:

> I'm using the example of the site
> http://docs.python.org/lib/module-struct.html :
>
> import struct
> pack('hhl', 1, 2, 3)

That code should raise a NameError. Either you are using *another* pack  
function, or that is not what you actually typed.
This is what I get:

Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)]  
on win32
Type "help", "copyright", "credits" or "license" for more information.
py> import struct
py> struct.pack('hhl', 1, 2, 3)
'\x01\x00\x02\x00\x03\x00\x00\x00'

> I should get:
>>>> '\x00\x01\x00\x02\x00\x00\x00\x03'

Maybe on another platform - on i386 I get the byte ordering as above.

-- 
Gabriel Genellina



From aleax at mac.com  Mon Mar 19 01:11:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 22:11:44 -0700
Subject: list comprehension help
References: <mailman.5246.1174234283.32031.python-list@python.org>
	<1174269687.497013.249480@o5g2000hsb.googlegroups.com>
	<1hv6v32.17ahray13d45puN%aleax@mac.com>
	<mailman.5265.1174280315.32031.python-list@python.org>
Message-ID: <1hv6ysz.1eicq7etgq7ysN%aleax@mac.com>

rkmr.em at gmail.com <rkmr.em at gmail.com> wrote:
   ...
> > > files (you see "huge" is really relative ;-)) on 2-4GB RAM boxes and
> > > setting a big buffer (1GB or more) reduces the wall time by 30 to 50%
> > > compared to the default value. BerkeleyDB should have a buffering
> > Out of curiosity, what OS and FS are you using?  On a well-tuned FS and
> 
> Fedora Core 4 and ext 3. Is there something I should do to the FS?

In theory, nothing.  In practice, this is strange.

> Which should I do? How much buffer should I allocate? I have a box
> with 2GB memory.

I'd be curious to see a read-only loop on the file, opened with (say)
1MB of buffer vs 30MB vs 1GB -- just loop on the lines, do a .split() on
each, and do nothing with the results.  What elapsed times do you
measure with each buffersize...?

If the huge buffers confirm their worth, it's time to take a nice
critical look at what other processes you're running and what all are
they doing to your disk -- maybe some daemon (or frequently-run cron
entry, etc) is out of control...?  You could try running the benchmark
again in single-user mode (with essentially nothing else running) and
see how the elapsed-time measurements change...


Alex


From dd55 at cornell.edu  Wed Mar 14 18:03:22 2007
From: dd55 at cornell.edu (Darren Dale)
Date: Wed, 14 Mar 2007 18:03:22 -0400
Subject: string formatting: engineering notation
References: <et9l3u$e57$1@ruby.cit.cornell.edu>
	<1173908915.676706.176140@l75g2000hse.googlegroups.com>
Message-ID: <et9rir$9ql$1@ruby.cit.cornell.edu>

attn.steven.kuo at gmail.com wrote:

> On Mar 14, 1:14 pm, Darren Dale <d... at cornell.edu> wrote:
>> Does anyone know if it is possible to represent a number as a string with
>> engineering notation (like scientific notation, but with 10 raised to
>> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
>> decimal.Decimal class, but repeatedly instantiating Decimals is
>> inefficient for my application (matplotlib plotting library). If it is
>> not currently possible, do you think the python devs would be receptive
>> to including support for engineering notation in future releases?
> 
> 
> Do you also consider this to be too inefficient?
> 
> 
> import math
> 
> for exponent in xrange(-10, 11):
>     flt = 1.23 * math.pow(10, exponent)
>     l = math.log10(flt)
>     if l < 0:
>         l = l - 3
>     p3 = int(l / 3) * 3
>     multiplier = flt / pow(10, p3)
>     print '%e => %fe%d' % (flt, multiplier, p3)
> 

That's a good suggestion. It's probably fast enough. I was hoping that
something like '%n'%my_number already existed.


From MonkeeSage at gmail.com  Mon Mar  5 18:23:30 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 15:23:30 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
	<1173131863.216300.109120@s48g2000cws.googlegroups.com>
	<9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>
Message-ID: <1173137010.498117.259470@j27g2000cwj.googlegroups.com>

Stef,

What Adam is talking about has nothing to do with windows or *nix.
He's talking about packing one or more .py files into a single
archive, which can be imported just like the regular .py files. This
means you can distribute a whole bunch of module files/dirs as a
single .pyc file. It just makes it easier to have a single file to
distribute rather than a whole bunch, or a zip that one has to unzip
into a certain directory, &c. So you can have myscript.py +
myscriptfiles.pyc vs. myscript.py + somedepdir/ + someotherdepdir/ +
somedepfile.py...&c.

If you still don't get it, you don't need it.

Regards,
Jordan



From nagle at animats.com  Tue Mar 20 13:32:33 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 20 Mar 2007 17:32:33 GMT
Subject: difference between urllib2.urlopen and firefox view 'page source'?
In-Reply-To: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
References: <1174357838.255108.141880@o5g2000hsb.googlegroups.com>
Message-ID: <RUULh.9503$Um6.796@newssvr12.news.prodigy.net>

    Here's a useful online tool that might help you see what's happening:

	http://www.sitetruth.com/experimental/viewer.html

We use this to help webmasters see what our web crawler is seeing.

    This reads a page, using Python and FancyURLOpener, with a
USER-AGENT string of "SiteTruth.com site rating system."
Then it parses the page with BeautifulSoup, removes all
<SCRIPT>, <EMBED>, and <OBJECT> tags, makes all the links
absolute, then writes the page back out in UTF-8 Unicode.
The resulting cleaned-up page is displayed.

    If the page you're trying to read looks OK with our viewer,
you should be able to read it from Python with no problems.

				John Nagle

cjl wrote:
> Hi.
> 
> I am trying to screen scrape some stock data from yahoo, so I am
> trying to use urllib2 to retrieve the html and beautiful soup for the
> parsing.
> 
> Maybe (most likely) I am doing something wrong, but when I use
> urllib2.urlopen to fetch a page, and when I view 'page source' of the
> exact same URL in firefox, I am seeing slight differences in the raw
> html.
> 
> Do I need to set a browser agent so yahoo thinks urllib2 is firefox?
> Is yahoo detecting that urllib2 doesn't process javascript, and
> passing different data?
> 
> -cjl
> 


From justin.mailinglists at gmail.com  Fri Mar 16 02:57:09 2007
From: justin.mailinglists at gmail.com (Justin Ezequiel)
Date: 15 Mar 2007 23:57:09 -0700
Subject: getting local system information with python
In-Reply-To: <mailman.5167.1174026436.32031.python-list@python.org>
References: <mailman.5167.1174026436.32031.python-list@python.org>
Message-ID: <1174028229.463204.287630@e65g2000hsc.googlegroups.com>

On Mar 16, 2:27 pm, Astan Chee <s... at al.com.au> wrote:
> Hi,
> I have a python script and I want to check what operating system it is
> on and what the current local machine name is.
> How do I do it with python?
> Thanks!
> Astan

import platform
platform.uname()



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 26 05:38:50 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 26 Mar 2007 11:38:50 +0200
Subject: Python object overhead?
In-Reply-To: <mailman.5563.1174770480.32031.python-list@python.org>
References: <mailman.5530.1174684299.32031.python-list@python.org>	<56ja46F28lpp9U1@mid.individual.net>
	<mailman.5563.1174770480.32031.python-list@python.org>
Message-ID: <460794aa$0$3272$426a74cc@news.free.fr>

Felipe Almeida Lessa a ?crit :
> On 3/23/07, Bjoern Schliessmann
> <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> wrote:
>> (Note that almost everything in Python is an object!)
> 
> Could you tell me what in Python isn't an object? 

statements and expressions ?-)



From deepblue.ar at gmail.com  Sat Mar 10 14:29:09 2007
From: deepblue.ar at gmail.com (Deep)
Date: 10 Mar 2007 11:29:09 -0800
Subject: Formatted Input
Message-ID: <1173554949.335778.324720@8g2000cwh.googlegroups.com>

Hi all,
I am a newbie to python
I have an input of form
<one number> space <another number>
ie.
4 3
how can i assign these numbers to my variables??



From sittner at lkb.ens.fr  Sat Mar 17 16:00:57 2007
From: sittner at lkb.ens.fr (sittner at lkb.ens.fr)
Date: Sat, 17 Mar 2007 21:00:57 +0100 (CET)
Subject: class question
In-Reply-To: <mailman.16977.1174059603.32030.python-list@python.org>
References: <mailman.16977.1174059603.32030.python-list@python.org>
Message-ID: <38131.81.67.94.33.1174161657.squirrel@mailgate.phys.ens.fr>

Hello there,
i am pretty new to object-oriented programming and i have a question:
let's say i have a simple class such as:
class father:
     age=...
     name=....
     def abcd.....
     class son(father):
            age=....
            name=....
            def efgh:
or any other heirarchic structure of class and subclasses.
i would like to list or print the data content of a given instance of the
subclass, all the way up (e.g. if sam is jack's son, so i would like to
get their names and ages and use the class as a data structure for that
matter).
how do i do this?
thanks,
t



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 29 10:38:34 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 29 Mar 2007 16:38:34 +0200
Subject: how can I clear a dictionary in python
In-Reply-To: <KP-dnXOp7ea8IZbbnZ2dnUVZ_oCmnZ2d@comcast.com>
References: <1175121525.261424.72350@n76g2000hsh.googlegroups.com>
	<4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d@comcast.com>
	<euerie$c7$1@panix3.panix.com>
	<KP-dnXOp7ea8IZbbnZ2dnUVZ_oCmnZ2d@comcast.com>
Message-ID: <460bcf46$0$23128$426a74cc@news.free.fr>

Larry Bates a ?crit :
> Aahz wrote:
>> In article <4_SdndYI-pFUbZfbnZ2dnUVZ_hzinZ2d at comcast.com>,
>> Larry Bates  <lbates at websafe.com> wrote:
>>> Marko.Cain.23 at gmail.com wrote:
>>>> I create a dictionary like this
>>>> myDict = {}
>>>>
>>>> and I add entry like this:
>>>> myDict['a'] = 1
>>>> but how can I empty the whole dictionary?
>>> just point myDict to an empty dictionary again
>>>
>>> myDict={}
>> Go back and read Christian's post, then post a followup explaning why his
>> solution is better than yours.  Your explanation should use id().
> 
> I believe he (as many new to Python do) are mired in old
> programming thinking that variables "contain" things.

Does "he" refer to Christian Tismer ? If so, you may want to use google 
and correct your beliefs (hint: does 'stackless Python' ring a bell ?).

> As I'm sure you kno, variables point to things in Python.

(conceptually) names are keys associated with an object in a given 
namespace. FWIW, be assured that Christians knows this pretty well.

> I don't believe that there are lots of other objects
> pointing to this dictionary.

You just cannot *know* this. This might be true now, this might be false 
now, and this might change anytime. Assuming anything here is the road 
to disaster. Don't assume, do the righ thing.

>  Perhaps the OP can clarify
> for us.  If there aren't other objects pointing to
> this dictionary it would make NO sense to iterate over a
> dictionary and delete all the keys/values

You don't iterate over anything. Dicts being the central datastructure 
in Python, you can bet your ass they are optimized to death (or near 
death). If you have any doubt, then still don't assume : verify (hint: 
import timeit). And yet even if clearing a dict happens to be a bit 
slower than instanciating a new one, rebinding a name and mutating an 
object are still two very different concepts in Python, with very 
different consequences. The OP explicitely asked for clearing a dict, 
not for creating a new one.

> so I tried to read
> between the lines

Why ?

> and answer what I believe the OP thought he
> was asking.

What the OP asked was quite clear, and not subject to any 
interpretation. And the correct answer is obviously not the one you gave.

>  BTW-I didn't see you posting an answer to what
> you thought was the "correct" question, just criticizing me
> for taking the time to answer what I perceived the OP was
> asking.

If you cannot understand the difference between criticism and a friendly 
correction,  nor why you should actually thank the one correcting you 
when you're wrong, I guess there's no point trying explaining why 
correcting wrong answers on newsgroups is actually important.


From kyosohma at gmail.com  Thu Mar 29 10:02:34 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 07:02:34 -0700
Subject: upgrading python (and other modules)
In-Reply-To: <mailman.5742.1175148886.32031.python-list@python.org>
References: <460B4B9A.1010703@al.com.au>
	<mailman.5742.1175148886.32031.python-list@python.org>
Message-ID: <1175176953.845986.20980@e65g2000hsc.googlegroups.com>

On Mar 29, 1:14 am, Astan Chee <s... at al.com.au> wrote:
> Forget I asked this question.
> I've solved it using wxPython 2.6.3.3
> Cheers
>
> Astan Chee wrote:
> > Hi,
> > I was once using python 2.4 in win2k with wxPython 2.4.2.4 (if im not
> > mistaken) with it.
> > Now i've upgraded to winXP and am using python 2.5 with wxPython 2.8.1.1.
> > The problem Im currently having is that in my code:
>
> > from wxPython.wx import *
> > from wxPython.grid import *
> > from wxPython.html import *
>
> > no longer works. An error/warning appears:
>
> > Warning (from warnings module):
> >   File "C:\stanc_home\WHIP\whip.py", line 7
> >     from wxPython.wx import *
> > DeprecationWarning: The wxPython compatibility package is no longer
> > automatically generated or activly maintained.  Please switch to the wx
> > package as soon as possible.
>
> > Traceback (most recent call last):
> >   File "C:\stanc_home\WHIP\whip.py", line 10, in <module>
> >     from wxPython.html import *
> >   File "C:\Python25\lib\site-packages\wx-2.8-msw-ansi\wxPython\html.py",
> > line 151, in <module>
> >     wxHtmlWindowEvent = wx.html.HtmlWindowEvent
> > AttributeError: 'module' object has no attribute 'HtmlWindowEvent'
>
> > How should I be importing in the new wx?
> > Thanks!
> > Astan

The wxPython community typically recommends NOT doing a "from
wxPython.wx import *" due to the increased likelihood of namespace
poisoning. If you really want to know how to do it anyway, you should
contact the wxPython users group directly at http://wxpython.org/maillist.php

Mike



From aboudouvas at panafonet.gr  Mon Mar 19 10:44:20 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 19 Mar 2007 07:44:20 -0700
Subject: PythonCard thoughts
In-Reply-To: <45fe9b31$0$17946$c3e8da3@news.astraweb.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
	<45fe9b31$0$17946$c3e8da3@news.astraweb.com>
Message-ID: <1174315460.650400.202270@e1g2000hsg.googlegroups.com>

> I don't know much about PythonCard or wxGlade, but I use wxPython (which
> wxGlade uses, right?) and you now have the option to separate your GUI
> and code using an XRC file (xml file that describes layout). So perhaps
> this is something you can do with wxGlade, but at the same time it might
> still create the problem you describe above. However, it's very to have
> your Python files contain just logic.

Yes, both products (PythonCard and wxGlade) uses wxPython. It's just
that PythonCard is sitting on top of wxPython and it intercepts the
events generated. Then it search for an appropriate declared function
on your code and call it (all this happens at runtime).
It shield us from much of the boilerplate code that gui toolkits
require and in the case that you need to address directly wxPython,
you just can!

I discovered that when you run your designed GUI from PythonCard's
layoutEditor, you have the ability to define a command line option
that is called
"Message Watcher". This, will show you the names of the actual events
that you have to write code for, so you, at least for this, do not
have
to dig the docs for their names. Pretty good!



From researchbase at gmail.com  Wed Mar 14 05:17:44 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Wed, 14 Mar 2007 14:47:44 +0530
Subject: help developing an editor to view openoffice files.
In-Reply-To: <45F78F5F.6030602@eventuallyanyway.com>
References: <mailman.5005.1173770157.32031.python-list@python.org>
	<et6g05$4av$1$8300dec7@news.demon.co.uk> <et6unr$fd7$1@sea.gmane.org>
	<f81479dd0703132203m2b5037e5uf6dd22e7abb2a2c5@mail.gmail.com>
	<45F78F5F.6030602@eventuallyanyway.com>
Message-ID: <f81479dd0703140217h3b85995fra1d5d3ea40148f53@mail.gmail.com>

On 14/03/07, Paul Hummer <paul at eventuallyanyway.com> wrote:

> I actually just read this in the O'Reilly book "Python Cookbook," so I
> know this answer off the top of my head.  OpenOffice files are merely
> zip files with well documented XML inside.  Use the builtin zip module
> to open them, and then it's just XML parsing.  As far as the editor,
> you'll have to familiarize yourself with the XML data from the
> documentation, and it sounds like that's quite a project.
>
it is indeed a huge project but I need to get started.
I know that it is xml inside a zipped archive.  but reading the
documents is one thing and rendering them is another.
just in case we can convert it to html and then render it in some kind
of a html browser or html text area and then when user makes changes
to the document, we can save it back to odt.  but for that we need
both way conversion.


> Just out of curiosity, why not just download OpenOffice?
>
I wished I could use it out of the box.
but the problem is that open office does not provide any accessibility
on windows and on linux the work is going on.
regards.
Krishnakant.


From adam at atlas.st  Mon Mar  5 16:57:43 2007
From: adam at atlas.st (Adam Atlas)
Date: 5 Mar 2007 13:57:43 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <45ec89a4$0$2349$426a74cc@news.free.fr>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
Message-ID: <1173131863.216300.109120@s48g2000cws.googlegroups.com>

Ah... heh, sorry, I misread your message as "a much more convenient
way" rather than "much more than a convenient way". Anyway, I
understand that, and I do indeed find setuptools useful and use it on
a regular basis.

But my other points still stand. This would be a moot point if
setuptools were part of the standard library, but it's not, and I
don't see why people should have to bother installing it if they
simply want to try a small package. Look at Beautiful Soup, for
example. It's distributed as a single .py file, and that's great. With
most modules, all I want to do is download them and plop them into my
project directory. You can always copy it into site-packages if you
want to access it globally, and you can always unzip it if you need to
see the source.

So I *will* retract my statement that this could be an "alternative"
to eggs -- ideally, it would be an addition, since it doesn't break
compatibility at all. You could download an egg and rename it to .pyc,
and import it like any other module, and at any point later, you could
rename it back to .egg and use setuptools to install it if you wish.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar  8 05:55:31 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 08 Mar 2007 11:55:31 +0100
Subject: splitting common functions into a sepperate module
In-Reply-To: <1173348733.037351.229990@64g2000cwx.googlegroups.com>
References: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>
	<45efd90d$0$24707$426a74cc@news.free.fr>
	<1173348733.037351.229990@64g2000cwx.googlegroups.com>
Message-ID: <45efeb80$0$5884$426a74cc@news.free.fr>

jonkersbart at gmail.com a ?crit :
> On 8 mrt, 10:36, Bruno Desthuilliers <bruno.
(snip)
>> - wrapping the functions as methods of a class, passing the whole state
>> as args to the class initializer.
> I already considerate this one, but I don't like it because it is not
> correct in terms of the object-oriented concept.

Oh yes ? Why so ? You have a bunch of behaviors dependent on a same 
state, don't you ?


> Because there are no other solutions I have to bury my bad feelings
> and use this solution.

Better to leave "correctness of object-oriented concept" to purists and 
zealots, and use the appropriate *pragmatic* solution IMHO. No reason to 
have "bad feelings" here.


From steve at holdenweb.com  Thu Mar 22 04:39:12 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 04:39:12 -0400
Subject: Garbage collection
In-Reply-To: <1hvchlx.13gg6ie17naf4oN%aleax@mac.com>
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>	<mailman.5394.1174484981.32031.python-list@python.org>	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>	<mailman.5398.1174490143.32031.python-list@python.org>	<etrj61$euc$1@gemini.csx.cam.ac.uk>	<mailman.5403.1174493865.32031.python-list@python.org>	<etrpqf$t8g$3@gemini.csx.cam.ac.uk>
	<1hvchlx.13gg6ie17naf4oN%aleax@mac.com>
Message-ID: <ettfe2$n31$1@sea.gmane.org>

Alex Martelli wrote:
> Tom Wright <tew24 at spam.ac.uk> wrote:
> 
>> real programs.  I can't help thinking that there are some situations where
>> you need a lot of memory for a short time though, and it would be nice to
>> be able to use it briefly and then hand most of it back.  Still, I see the
>> practical difficulties with doing this.
> 
> What I do in those cases:
> a. fork
> b. do the memory-hogging work in the child process
> c. meanwhile the parent just waits
> d. the child sends back to the parent the small results
> e. the child terminates
> f. the parent proceeds merrily
> 
> I learned this architectural-pattern a long, long time ago, around the
> time when fork first got implemented via copy-on-write pages... 
> 
Yup, it's easier to be pragmatic and find the real solution to your 
problem than it is to try and mould reality to your idea of what the 
solution should be ...

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From timm.gloger at gmail.com  Thu Mar  1 17:33:48 2007
From: timm.gloger at gmail.com (timm.gloger at gmail.com)
Date: 1 Mar 2007 14:33:48 -0800
Subject: Unpacking problem
In-Reply-To: <1172788187.562316.194140@j27g2000cwj.googlegroups.com>
References: <1172783865.479377.42790@h3g2000cwc.googlegroups.com>
	<1172788187.562316.194140@j27g2000cwj.googlegroups.com>
Message-ID: <1172788428.152377.230100@n33g2000cwc.googlegroups.com>

Ok, that solves my confusion.
Thanks, Marc.





From paltman at gmail.com  Wed Mar 14 11:47:48 2007
From: paltman at gmail.com (Patrick Altman)
Date: 14 Mar 2007 08:47:48 -0700
Subject: httplib/socket problems reading 404 Not Found response
In-Reply-To: <mailman.5032.1173817122.32031.python-list@python.org>
References: <1173755273.697153.97270@64g2000cwx.googlegroups.com>
	<mailman.4994.1173757609.32031.python-list@python.org>
	<1173793104.358361.137130@30g2000cwc.googlegroups.com>
	<mailman.5032.1173817122.32031.python-list@python.org>
Message-ID: <1173887268.755589.189090@e65g2000hsc.googlegroups.com>

On Mar 13, 3:16 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Tue, 13 Mar 2007 10:38:24 -0300, Patrick Altman <palt... at gmail.com>
> escribi?:
>
> >> Yes, it's a known problem. See this message with a
> >> self-response:http://mail.python.org/pipermail/python-list/2006-March/375087.html
> > Are there plans to include this fix in the standard Python libraries
> > or must I make the modifications myself (I'm running Python 2.5)?
>
> Submit a bug report, if not already done.http://sourceforge.net/tracker/?group_id=5470
>
> --
> Gabriel Genellina

Bug already exists at:
https://sourceforge.net/tracker/index.php?func=detail&aid=1486335&group_id=5470&atid=105470

In the meantime, I implemented a work around for my specific case in
the Amazon S3 library in that I implemented a head() method but am
actually just requesting a GET operation with a very small byte
range.  This is essentially yielding all the same header data that I
need (md5 hash in the ETag if the file exists, 404 Not Found if it
doesn't).



From msharelick at gmail.com  Wed Mar 21 10:55:51 2007
From: msharelick at gmail.com (Matthew)
Date: 21 Mar 2007 07:55:51 -0700
Subject: Testing Python updates
Message-ID: <1174488951.275163.305440@y66g2000hsf.googlegroups.com>

Hello:

What is the methodology for testing the updates to the Python
language?

Thanks

Matthew Harelick



From anton.vredegoor at gmail.com  Wed Mar 14 13:13:38 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Wed, 14 Mar 2007 18:13:38 +0100
Subject: number generator
In-Reply-To: <et8mjc$7ka$1@news4.zwoll1.ov.home.nl>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<1173861843.878008.83090@p15g2000hsd.googlegroups.com>
	<et8mjc$7ka$1@news4.zwoll1.ov.home.nl>
Message-ID: <et9fg4$bfs$3@news4.zwoll1.ov.home.nl>

Anton Vredegoor wrote:

> def memoize(fn):
>       cache = {}
>       def proxy(*args):
>           try: return cache[args]
>           except KeyError: return cache.setdefault(args, fn(*args))
>       return proxy

Sorry this doesn't work in this case. This works:

def memoize(fn):
      cache = {}
      def proxy(*args):
          try: return cache[args]
          except KeyError: return cache.setdefault(args, list(fn(*args)))
      return proxy

But then we lose all speed advantages from memoizing so
it's no good either.

A.


From nobody at invalid.com  Tue Mar 27 12:09:24 2007
From: nobody at invalid.com (Erik Johnson)
Date: Tue, 27 Mar 2007 10:09:24 -0600
Subject: Help in Placing Object in Memory
References: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
	<56sp7kF2b0fj6U1@mid.uni-berlin.de>
Message-ID: <460941a4$1@nntp.zianet.com>


"Diez B. Roggisch" <deets at nospam.web.de> wrote in message
news:56sp7kF2b0fj6U1 at mid.uni-berlin.de...

> What do you mean by that? They can both load a pickled object, yes. But
they
> can't share it as a at-runtime object, where changes in one script are
> immediately are known to the other.
>
> To do such a thing, look at pyro.

    Or not natively (i.e., that battery isn't included). I believe it can
still be done, though: http://poshmodule.sourceforge.net/
(I haven't used the module - just used Google to locate it)

You could, of course, roll-your-own solution using shared memory and/or
other interprocess communication (http://docs.python.org/lib/ipc.html)

Hope that helps,
-ej




From waldemar.osuch at gmail.com  Wed Mar 14 16:50:59 2007
From: waldemar.osuch at gmail.com (Waldemar Osuch)
Date: 14 Mar 2007 13:50:59 -0700
Subject: Setting Up SOAPpy for Python v2.5 on Windows?
In-Reply-To: <1173889322.302145.71680@n59g2000hsh.googlegroups.com>
References: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
	<1173889322.302145.71680@n59g2000hsh.googlegroups.com>
Message-ID: <1173905459.913868.64530@n76g2000hsh.googlegroups.com>

On Mar 14, 10:22 am, "Steve" <sreissc... at gmail.com> wrote:
> All,
>
> Thanks for the suggestions!
>
> I think that I will move forward with elementsoap instead of soappy...
>

Maybe worth checking out the new kid on the block too:
http://trac.optio.webfactional.com/wiki




From arnodel at googlemail.com  Tue Mar 13 16:44:27 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 13 Mar 2007 13:44:27 -0700
Subject: Iterating across a filtered list
In-Reply-To: <45f70709$0$5892$426a34cc@news.free.fr>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
	<1173812047.578137.223430@j27g2000cwj.googlegroups.com>
	<7xmz2hndh0.fsf@ruckus.brouhaha.com>
	<45f70709$0$5892$426a34cc@news.free.fr>
Message-ID: <1173818667.789785.111220@d57g2000hsg.googlegroups.com>

On Mar 13, 8:53 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Paul Rubin a ?crit :

[snip]

> >  Iterators like that are a new Python feature
>
> List comps are not that new (2.0 or 2.1 ?):
> print "\n".join([contact for name, contact in contacts.items() \
>                   if search.match(name)])

You can write this, but:
   * it is difficult to argue that it is more readable than Paul's (or
my)  'imperative' version;
   * it has no obvious performance benefit, in fact it creates a list
unnecessarily (I know you could use a generator with recent python).

> > and they have
> > some annoying characteristics, like the way they mutate when you touch
> > them.
>
> While sequences are iterables, all iterables are not sequences. Know
> what you use, and you'll be fine.

...And know when to use for statements :)

--
Arnaud



From S.Mientki-nospam at mailbox.kun.nl  Sun Mar 18 10:00:29 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Sun, 18 Mar 2007 15:00:29 +0100
Subject: IDE for wxPython
In-Reply-To: <mailman.5235.1174178014.32031.python-list@python.org>
References: <mailman.5235.1174178014.32031.python-list@python.org>
Message-ID: <6065a$45fd45d2$d443bb3a$25190@news.speedlinq.nl>

Ghirai wrote:
> Hello python-list,
> 
> Can anyone suggest an IDE for wxPython?
> Or an IDE for TkInter?
> 
> Thanks.
> 
on this site, you can test which GUI is best suited for your needs
http://www.awaretek.com/toolkits.html
I think it might be PyhtonCard

-- 
cheers,
Stef Mientki
http://pic.flappie.nl


From lobais at gmail.com  Fri Mar  2 17:50:38 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Fri, 02 Mar 2007 23:50:38 +0100
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<54reqdF22ck5iU1@mid.individual.net>
Message-ID: <pan.2007.03.02.22.50.54@gmail.com>

Den Fri, 02 Mar 2007 21:13:02 +0100 skrev Bjoern Schliessmann:

> Thomas Dybdahl Ahle wrote:
> 
>> However I'd really like not to use the lambda, as it slows down the
>> code.
> 
> Did you check how much the slowdown is?

Yes, the lambda adds 50%


From ken.carlino at gmail.com  Mon Mar  5 21:22:14 2007
From: ken.carlino at gmail.com (ken)
Date: 5 Mar 2007 18:22:14 -0800
Subject: how can I find out the value of an environment variable?
Message-ID: <1173147734.603718.179870@8g2000cwh.googlegroups.com>

how can I find out the value of an environment variable in my pythong
script?

Thank you.



From mattheww at chiark.greenend.org.uk  Tue Mar  6 13:27:32 2007
From: mattheww at chiark.greenend.org.uk (Matthew Woodcraft)
Date: 06 Mar 2007 18:27:32 +0000 (GMT)
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
Message-ID: <WUi*LY2Er@news.chiark.greenend.org.uk>

Martin Unsal <martinunsal at gmail.com> wrote:
> We could discuss this till we're blue in the face but it's beside the
> point. For any given project, architecture, and workflow, the
> developers are going to have a preference for how to organize the
> code structurally into files, directories, packages, etc. The
> language itself should not place constraints on them.

I agree.


> For example, say you want to organize the widgets package as follows:
 
> widgets/scrollbar/*.py
> widgets/form/*.py
> widgets/common/util.py

One possibility is to have one module for each namespace that you want,
and compose each module out of multiple files by using execfile().

-M-



From tavares at fe.up.pt  Fri Mar 23 15:31:49 2007
From: tavares at fe.up.pt (tavares at fe.up.pt)
Date: 23 Mar 2007 12:31:49 -0700
Subject: ECCOMAS Thematic Conference VipIMAGE 2007 - Last Call for Papers
Message-ID: <1174678307.834652.310820@b75g2000hsg.googlegroups.com>

---------------------------------------------------------------------------------------------------------------------------------------------

(Apologies for cross-posting)

International ECCOMAS Thematic Conference VipIMAGE 2007 - I ECCOMAS
THEMATIC
CONFERENCE ON COMPUTATIONAL VISION AND MEDICAL IMAGE PROCESSING
17-19th October 2007, FEUP, Porto, Portugal
http://www.fe.up.pt/VIPIMAGE

We would appreciate if you could distribute this information by your
colleagues and co-workers.

---------------------------------------------------------------------------------------------------------------------------------------------

Dear Colleague,

The International Conference VipIMAGE - I ECCOMAS THEMATIC CONFERENCE
ON COMPUTATIONAL VISION AND MEDICAL IMAGE PROCESSING will be held in
the Faculty of Engineering of University of Porto, Porto, Portugal, on
October 17-19, 2007.

VipIMAGE will bring together several researchers from around the world
representing several fields of study related to Computational Vision
and Medical Image Processing, such as: Physics of Medical Imaging;
Signal and image Processing; Simulation and Modelling; Data
Interpolation, Registration and Compression; Telemedicine; Computer
Aided Diagnosis, Surgery, Therapy, and Treatment; Computational
Bioimaging and Visualization; Software Development and Grid Computing.

The organizers would like to invite you to submit your contributions
for VipIMAGE until the end of March.

More details can be found in the conference website: http://www.fe.up.pt/VIPIMAGE.

Important dates

Submission of extended abstracts: March 31, 2007;
Authors Notification: April 15, 2007;
Lectures and Final Papers: May 15, 2007;
Early registration fee: May 31, 2007.

Proceedings

The proceedings book of VipIMAGE will be will published by the Taylor
& Francis Group.

Invited Lectures

- Automatic Generation of Computer Models from Multi-modal Bio-medical
Imaging - Chandrajit Bajaj, USA
- Computational Bioimaging and Visualization - Chris Johnson, USA
- From Geometrical Models to Physiological Models of the Human Body -
Herv? Delingette, France
- Latest advances in Cardiovascular Informatics - Ioannis A.
Kakadiaris, USA
- Robust Algorithms for Deformable Contours - Jorge S. Marques,
Portugal
- Image Sequence Evaluation - Juan J. Villanueva, Spain
- Fast Surface Segmentation and remeshing by finding geodesics -
Laurent Cohen, France
- Processing of Simultaneous acquisition of EEG and fMRI - Mario
Forjaz Secca, Portugal
- Automatic Construction of Statistical Shape Models using Non-Rigid
Registration - Tim Cootes, UK
- Theory of Digital Manifolds and its Applications to Medical Imaging
- Valentin Brimkov, USA & Reinhard Klette, NZ


We are looking forward to host you in Porto next October.

Kind regards,

Jo?o Manuel R. S. Tavares
Renato Natal Jorge
(conference co-chairs)



From alainpoint at yahoo.fr  Thu Mar 22 12:41:43 2007
From: alainpoint at yahoo.fr (alain)
Date: 22 Mar 2007 09:41:43 -0700
Subject: challenge ?
Message-ID: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>

I have a problem I wonder if it has been solved before.
I have a dictionnary and I want the values in the dictionnary to be
annotated with the rank that would be obtained by sorting the values

def annotate_with_rank(my_dict):
	....
	return my_annotated_dict

In other words, any value a_value would become a 2-tuple
(a_value,rank_of_a_value)

I seek an elegant solution.

Alain



From bignose+hates-spam at benfinney.id.au  Wed Mar 28 00:02:32 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 28 Mar 2007 14:02:32 +1000
Subject: Python automatic testing: mocking an imported module?
References: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>
Message-ID: <87zm5ykobr.fsf@benfinney.id.au>

"Silfheed" <silfheed at gmail.com> writes:

> So we have the following situation: we have a testee.py that we want
> to automatically test out and verifiy that it is worthy of being
> deployed.

This is sometimes called the "module under test". I wish there was a
more succinct name in common usage.

> We want our tester.py to test the code for testee.py
> without changing the code for testee.py.

This is called a "unit test" for the module.

> testee.py has a module in it

Looking at your example, testee.py *imports* a module; it doesn't
contain another one.

> that we want to mock in some tests and in othemodule.

Excellent idea.


===== foo.py =====
class Bar(object):
    def __init__(self):
        self.name = "bar"
=====

===== dostuff.py =====
import foo

def get_bar():
    return foo.Bar()
=====

===== test_dostuff.py =====
import dostuff

class Mock_foo_module(object):
    """ Mock object for foo module """

    class Bar(object):
        def __init__(self):
            self.name = "banana"

def test_dostuff_get_bar_should_create_bar():
    """ The dostuff.get_bar function should create a new Bar """
    dostuff.foo = Mock_foo_module()
    test_bar = dostuff.get_bar()
    if not test_bar.name == "banana":
        raise AssertionError("test_bar.name should be banana")
=====

This is simply using an instance of a class (Mock_foo_module) to be a
mock 'module' object. That mock module has the required 'Bar'
attribute, bound to a class; so the 'dostuff' module's 'foo' attribute
can be replaced with our mock module object for the purpose of the
test.

The mock module's Bar class behaves in an idiomatic way (setting the
'name' attribute of its instance to a known value) that we use to
check whether the 'dostuff' module actually used our mock module.

This can be extended to mock any module interface you like, and then
confirm that the module under test has actually used the module as
expected.

-- 
 \         "A politician is an animal which can sit on a fence and yet |
  `\               keep both ears to the ground."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney


From stefaan.himpe at gmail.com  Thu Mar 22 16:38:08 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 22 Mar 2007 13:38:08 -0700
Subject: XML based programming language
In-Reply-To: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
References: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>
Message-ID: <1174595888.458553.266590@l77g2000hsb.googlegroups.com>

Thank you for all the answers!

Stefaan.




From yinyang at eburg.com  Sun Mar  4 15:19:38 2007
From: yinyang at eburg.com (Gordon Messmer)
Date: Sun, 04 Mar 2007 12:19:38 -0800
Subject: thread safe SMTP module
In-Reply-To: <esf50h$9n6$1@panix3.panix.com>
References: <mailman.4616.1172878783.32031.python-list@python.org>	<esd374$927$1@panix3.panix.com>	<mailman.4644.1172997256.32031.python-list@python.org>
	<esf50h$9n6$1@panix3.panix.com>
Message-ID: <45EB29DA.3010100@eburg.com>

Aahz wrote:
> 
> Assuming you have correctly tracked down the problem area, I would call
> that a thread bug in Python.  But my experience is that you simply have
> run into a problem with the socket.  I would suggest that using
> socket.setdefaulttimeout() would work just as well.

I believe that solution, also would not work.  This note is included in 
the socket documentation, regarding "timeout mode":

http://docs.python.org/lib/socket-objects.html
"A consequence of this is that file objects returned by the makefile() 
method must only be used when the socket is in blocking mode; in timeout 
or non-blocking mode file operations that cannot be completed 
immediately will fail."

smtplib.SMTP uses file objects when reading SMTP responses.  If I used 
setdefaulttimeout(), then the socket would be in timeout mode and the 
above note would be applicable.

I am not at all above calling python's behavior a bug, except that it 
seemed like a known behavior given the note in the thread documentation 
regarding built-in functions that block on I/O.


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 16:50:04 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 22:50:04 +0100
Subject: Newbie question
In-Reply-To: <mailman.4684.1173113802.32031.python-list@python.org>
References: <mailman.4684.1173113802.32031.python-list@python.org>
Message-ID: <45ec8892$0$2349$426a74cc@news.free.fr>

Tommy Grav a ?crit :
> Hi list,
> 
>    this is somewhat of a newbie question that has irritated me for a  
> while.
> I have a file test.txt:
> 
> 0.3434  0.5322 0.3345
> 1.3435  2.3345 5.3433
> 
> and this script
> lines = open("test.txt","r").readlines()
> for line in lines:
>    (xin,yin,zin) = line.split()
>    x = float(xin)
>    y = float(yin)
>    z = float(zin)
> 
> Is there a way to go from line.split() to x,y,z as floats without  
> converting
> each variable individually?

either map() or a list comprehension

import sys
fname = "test.txt"
lines = open(fname,"r")
for numline, line in enumerate(lines):
   try:
     x, y, z = map(float, line.split())
     # or:
     # x, y, z = [float(item) for item in line.split()]
   except (ValueError, IndexError), e:
     err = "Invalid data format in %s line %s : "%s" (%s)" \
           % (fname, numline, line, e)
     print >> sys.stderr, err
     sys.exit(1)
   else:
     # do whatever appropriate here - anyway

HTH


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Wed Mar 14 07:03:12 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Wed, 14 Mar 2007 12:03:12 +0100
Subject: Attribute monitoring in a class
In-Reply-To: <mailman.5071.1173868190.32031.python-list@python.org>
References: <mailman.5071.1173868190.32031.python-list@python.org>
Message-ID: <45f7d65b$0$23624$426a74cc@news.free.fr>

Joel Andres Granados a ?crit :
> Hi list:
> 
> I have googled quite a bit on this matter and I can't seem to find what 
> I need (I think Im just looking where I'm not suppose to :).  I'm 
> working with code that is not of my authorship and there is a class 
> attribute that is changes by directly referencing it (object.attr = 
> value) instead of using a getter/setter (object.setAttr(Value) ) 

Which is the right thing to do in Python (I mean : *not* using 
Java-style getters/setters).

> function.  The thing is that I have no idea when the change occurs and I 
> would REALLY like to find out.
> So here comes my question .....
> Is there a function construct inside a python class that is 
> automatically called when an attr is changed????

yes : object.__setattr__(self, name, value)

# example:
class Class(object):
    def __init__();
       self.attr = "whatever"

    def __setattr__(self, name, value):
       object.__setattr__(self, name, value)
       if name == 'attr':
           print "It has changed"
           # you can also print the call frame,
           # or set a 'hard' breakpoint here...

obj = Class()
obj.attr = "other whatever"

*Output:*
It has changed


Or you might turn attr into a property:

class Class(object):
    def __init__();
       self.attr = "whatever"

    @apply
    def attr():
        def fset(self, value):
            self._attr = value
            print "It has changed"
        def fget(self):
            return self._attr
        return property(**locals())

But unless you have other needs than simple tracing/debugging, it's 
probably overkill.

HTH


From psdasilvaX at esotericaX.ptX  Sun Mar 18 13:29:48 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sun, 18 Mar 2007 17:29:48 +0000
Subject: Still the __new__ hell ...
In-Reply-To: <1174205175.415438.275540@e65g2000hsc.googlegroups.com>
References: <1174167360.522350@jubilee.claranet.pt>
	<1174169283.313703.157020@n59g2000hsh.googlegroups.com>
	<1174175255.203550@jubilee.claranet.pt>
	<1174205175.415438.275540@e65g2000hsc.googlegroups.com>
Message-ID: <1174238945.533376@jubilee.claranet.pt>

Arnaud Delobelle escreveu:
> On Mar 17, 11:48 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
>> Arnaud Delobelle escreveu:> On Mar 17, 9:31 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> 
> [snip]
> 
>> Thanks. This works exactly the way you wrote.
>> Yet I am misunderstanding something. Can't pickle "see" that being
>> MyDate derived from date it also has to look at variables from date?
>> When do I need to do this? I am using pickle with a lot more complex
>> classes without this problem.
> 
> Without the MyDate.__reduce__ method, Python uses the
> datetime.date.__reduce__ method to pickle your MyDate instances, then
> it uses MyDate.__new__ to unpickle them.  But your MyDate.__new__
> method does not understand the format of a pickled date.  You could
> also change the MyDate.__new__ method so that it does understand it,
> but it wouldn't be that easy as you want it to accept a string, and
> this is the format that dates are pickled in.
> 
> --
> Arnaud
> 
> 
> 

I see now. I need to read a little further about this stuff as soon as
I get some time to do it.

Thanks Arnaud.


From codecraig at gmail.com  Wed Mar 21 15:55:41 2007
From: codecraig at gmail.com (abcd)
Date: 21 Mar 2007 12:55:41 -0700
Subject: Make variable global
Message-ID: <1174506941.618827.48450@l75g2000hse.googlegroups.com>

I have a file, "a.py"

blah = None
def go():
    global blah
    blah = 5

>From the python interpreter I try....

>>> from a import *
>>> blah
>>> go()
>>> blah
>>>

...i was hoping to see "5" get printed out the second time I displayed
blah, but it doesn't.  Now, if I type this same code directly into the
python interpreter it works as i was hoping.  what i am missing?

thanks



From kyosohma at gmail.com  Fri Mar 16 17:10:00 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 16 Mar 2007 14:10:00 -0700
Subject: How to get the previous line in a file?
In-Reply-To: <mailman.5194.1174078319.32031.python-list@python.org>
References: <882682.16208.qm@web58912.mail.re1.yahoo.com>
	<mailman.5194.1174078319.32031.python-list@python.org>
Message-ID: <1174079400.953196.249730@e1g2000hsg.googlegroups.com>

On Mar 16, 3:51 pm, Shane Geiger <sgei... at ncee.net> wrote:
> lines = open('/tmp/foo.py',
> "r").read().splitlines()
>
> previous_line =
> ''
>
> for line in
> lines:
>
>     if "foo" in
> line:
>
>         print "found foo in the current line.  The previous line is:  "
> +
> previous_line
>
>     previous_line =
> line
>
>
>
> Qilong Ren wrote:
> > Hi,all
>
> > I am new to this list. And I am glade I am here.
> > I have a question. I need to do some text processing. I need to read
> > from a file line by line. If some line is met with some condition, the
> > previous line needs some modification. How to get the info of the
> > previous line?
>
> > Thanks!
> > Qilong
>
> > ------------------------------------------------------------------------
> > Never miss an email again!
> > Yahoo! Toolbar
> > <http://us.rd.yahoo.com/evt=49938/*http://tools.search.yahoo.com/toolb...>
> > alerts you the instant new Mail arrives. Check it out.
> > <http://us.rd.yahoo.com/evt=49937/*http://tools.search.yahoo.com/toolb...>
>
> --
> Shane Geiger
> IT Director
> National Council on Economic Education
> sgei... at ncee.net  |  402-438-8958  |  http://www.ncee.net
>
> Leading the Campaign for Economic and Financial Literacy
>
>  sgeiger.vcf
> 1KDownload

Hi,

You should be able to use the file object's seek and tell methods. Or,
since you're using a list, you could use a counter and when the text
is found, you can print the previous line by subtracting one from the
counter.

counter = 0
for line in lines:
   if 'foo' == line:
      print 'found line. the previous line is: ' %s (lines[counter-1])
   counter += 1

# Or something like that. Experiment!

Mike



From http  Tue Mar 13 14:42:52 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 10:42:52 -0800
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
Message-ID: <7xveh5nfwz.fsf@ruckus.brouhaha.com>

"Drew" <olsonas at gmail.com> writes:
> I'm currently writing a toy program as I learn python that acts as a
> simple address book. I've run across a situation in my search function
> where I want to iterate across a filtered list. My code is working
> just fine, but I'm wondering if this is the most "elegant" way to do
> this. Essentially, I'm searching the dict self.contacts for a key that
> matches the pattern entered by the user. If so, I print the value
> associated with that key. A pastie to the method is below, any help/
> advice is appreciated:

If I can decipher your Ruby example (I don't know Ruby), I think you
want:

   for name,contact in contacts.iteritems():
      if re.search('search', name):
          print contact

If you just want to filter the dictionary inside an expression, you
can use a generator expression:

  d = ((name,contact) for (name,contact) in contacts.iteritems() \
                        if re.search('search', name))

  print '\n'.join(d)   # prints items from filtered dict, one per line

Note that d is an iterator, which means it mutates when you step
through it.


From Tonicopm at yahoo.com  Mon Mar 19 13:52:21 2007
From: Tonicopm at yahoo.com (Tonico)
Date: 19 Mar 2007 10:52:21 -0700
Subject: 911 was a RACIST crime by YANK BASTARDS against all other NATIONS
	Re: *POLL* How many sheeple believe in the 911 fairy tale and
	willing to accept an Orwellian doublespeak and enslavement world ?
In-Reply-To: <1174326455.677819.242680@o5g2000hsb.googlegroups.com>
References: <1174284614.170100.264620@b75g2000hsg.googlegroups.com>
	<1174286336.522011.199040@e65g2000hsc.googlegroups.com>
	<1174286957.647696.43390@d57g2000hsg.googlegroups.com>
	<1174293761.623827.8790@y66g2000hsf.googlegroups.com>
	<1174326455.677819.242680@o5g2000hsb.googlegroups.com>
Message-ID: <1174326741.577556.221120@n59g2000hsh.googlegroups.com>

On 19 mar, 19:47, therma... at india.com wrote:
> On Mar 19, 12:42 am, "Don Stockbauer" <donstockba... at hotmail.com>
> wrote:
>
> > 911's primary utility was that, inadvertently, it sparked off the
> > formation of the global brain:
>
> > The Social Superorganism and its Global Brain
>
> >http://pespmc1.vub.ac.be/SUPORGLI.html
>
> > Have a nice Monday, all.
>
> > - Don
>
> Hey YANK MOTHERFUCKER, why didnt you bark this chime on that day when
> the BUSH bastards were talking of war and murder ...
>
> Typical genocidal and selfish yank bastard attitude ... heads I win,
> tail you lose.
>
> Thats why every country needs to have NUCLEAR WEAPONS TO DEFEND THEIR
> HONOR, WEALTH AND LAND FROM THE GREEEEDY YANK BASTARDS.
>
> Venezuela, Bolivia, Cuba, Saudi Arabia, Iran, Malaysia, DPRK all need
> long range anti-satellite missiles, ICBMs to defend against Yank
> Bastards.
>
> The GENOCIDAL anglo-saxon race has occupied TWO continents of North
> America and Australia and murdered the native population
> COMPLETELY !!!!

**********************************************************

As long as you continue taking it easily and with calm, dear....we all
love you.
Tonio
Pd. Why didn't you include Micronesia in your list of countries
needing ICBM's?? So rude of you.



From deets at nospam.web.de  Fri Mar  2 14:33:45 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 02 Mar 2007 20:33:45 +0100
Subject: Sort with extra variables
In-Reply-To: <pan.2007.03.02.19.29.39@gmail.com>
References: <pan.2007.03.02.19.29.39@gmail.com>
Message-ID: <54rchkF21jehuU1@mid.uni-berlin.de>

Thomas Dybdahl Ahle schrieb:
> I have a sort function in a python chess program.
> Currently it looks like this:
> 
> def sortMoves (board, table, ply, moves):
>     f = lambda move: getMoveValue (board, table, ply, move)
>     moves.sort(key=f, reverse=True)
>     return moves
> 
> However I'd really like not to use the lambda, as it slows down the code.
> 
> I've thought about saving the extra variables in the global space, but it 
> really feals ugly.
> 
> Do you have any ideas how I can sort these moves the fastest?

First of all, in your case it is somewhat strange to use

f = lambda ...

because then you could as well use

def f(move):
   ....

But that is just a general remark. Regarding the question: I don't see 
how that could possibly become faster without much more insight into 
what you are doing in getMoveValue. As it seems, it is dependend of a 
lot of factors that change often, so caching it isn't a real option. And 
I hope you are aware that the key-method is invoked only _once_ per 
list-item!

Thus it is pretty efficient.

Diez


From martinunsal at gmail.com  Tue Mar  6 13:58:14 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 10:58:14 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4725.1173205228.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
	<1173200953.714165.157200@h3g2000cwc.googlegroups.com>
	<mailman.4723.1173201596.32031.python-list@python.org>
	<1173203395.649560.249930@p10g2000cwp.googlegroups.com>
	<mailman.4725.1173205228.32031.python-list@python.org>
Message-ID: <1173207494.053325.100540@p10g2000cwp.googlegroups.com>

On Mar 6, 10:13 am, "Chris Mellon" <arka... at gmail.com> wrote:
> You have to reload the importing module as well as the module that
> changed. That doesn't require rewriting the import infrastructure.

As far as I can tell, the moment you use "from foo_module import bar",
you've broken reload(). Reloading higher level packages doesn't help.
The only practical solution I can see is to rewrite __import__ and
reload.

> Thats not answering the question. Presumably you have some sort of
> organization for your code in mind.

I already gave a simple example. I thought you were asking why I would
want to organize code that way, and the only short answer is
experience. I'd prefer not to try to formulate a long answer because
it would be time consuming and somewhat off topic, but we can go there
if necessary.

Martin



From kyosohma at gmail.com  Fri Mar 23 09:42:26 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 06:42:26 -0700
Subject: Catching an unknown error
In-Reply-To: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
References: <1174655767.755847.241670@y66g2000hsf.googlegroups.com>
Message-ID: <1174657346.379483.72200@e1g2000hsg.googlegroups.com>

On Mar 23, 8:16 am, "Harlin Seritt" <harlinser... at yahoo.com> wrote:
> Using the code below:
>
> ---BEGIN CODE---
>
> value = raw_input("Type a divisor: ")
> try:
>    value = int(value)
>    print "42 / %d = %d" % (value, 42/value)
> except ValueError:
>         print "I can't convert the value to an integer"
> except ZeroDivisionError:
>         print "Your value should not be zero"
> except:
>         print "Something unexpected happened"
>
> ---END CODE---
>
> In the last 'except' block, how can I print out the particular error
> name even though one is not specifically named?
>
> Thanks,
>
> Harlin

Thanks for pointing that out. I was following logic I was taught in
Hetland's book, which supposedly was up-to-date for Python 2.4.
Typical textbook error.

Mike



From jeff at jmcneil.net  Thu Mar 29 16:57:48 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Thu, 29 Mar 2007 16:57:48 -0400
Subject: SimpleXMLRPCServer and Threading
In-Reply-To: <460C2614.3090403@designaproduct.biz>
References: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>
	<460af7ef$1@nntp.zianet.com>
	<82d28c40703281809g3621bca3kd0bda42fc276ecf9@mail.gmail.com>
	<460C2614.3090403@designaproduct.biz>
Message-ID: <82d28c40703291357o15f19b1bv32d028bd11d14caa@mail.gmail.com>

I'd have to go dig into the library code again as I haven't been in there
since I did this myself a few months ago,  but I believe you're correct. If
you inherit from ThreadingMixIn, it will create a new thread for each
incoming request.  I believe it's the same way the standard
ThreadingTCPServer/ThreadingUDPServer classes work...  It will create a new
thread for each request, there's no pooling.

The ThreadingMixIn class overrides process_request, which TCPServer will
call to handle each request. The process_request method, in turn, creates a
new instance of your handler which is responsible for the RPC dispatching.

-Jeff

On 3/29/07, Laszlo Nagy <gandalf at designaproduct.biz> wrote:
>
> Jeff McNeil wrote:
> > This is off of memory so I apologize if I don't get all of the details
> right.
> >
> > The base SimpleXMLRPCServer uses TCPServer as it's server component
> > and SimpleXMLXMLRPCRequestHandler as it's handler. The handler is a
> > subclass of BaseHTTPRequestHandler, which itself doesn't handle any
> > multithreading.  You need to use one of the *MixIn classes if you want
> > to handle concurrent requests.
> >
> Does it mean that, if I subclass from ThreadingMixIn then my exported
> functions will be called from different threads? I created many multi
> threaded servers, based on TCPServer, but I'm not sure about
> XMLRPCServer.  I used to create my own handler class and in that case, a
> new handler instance was created for each request, then a new thread was
> created and handle_request was called from that new thread. I guess that
> in this case, a new SimpleXMLXMLRPCRequestHandler is created for each
> request and a new thread is started.... but I'm not sure. Please help us
> out.
>
> By the way, we should have __server__ examples in the documentation of
> xmlrpclib, right? What is the right way of contributing an example?
>
> Best,
>
>   Laszlo
>
>
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From phd at phd.pp.ru  Mon Mar 19 13:02:48 2007
From: phd at phd.pp.ru (Oleg Broytmann)
Date: Mon, 19 Mar 2007 20:02:48 +0300
Subject: SQLObject 0.8.1
Message-ID: <20070319170248.GB870@phd.pp.ru>

Hello!

I'm pleased to announce the 0.8.1 release of SQLObject.


What is SQLObject
=================

SQLObject is an object-relational mapper.  Your database tables are described
as classes, and rows are instances of those classes.  SQLObject is meant to be
easy to use and quick to get started with.

SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
known as SAPDB).


Where is SQLObject
==================

Site:
http://sqlobject.org

Development:
http://sqlobject.org/devel/

Mailing list:
https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss

Archives:
http://news.gmane.org/gmane.comp.python.sqlobject

Download:
http://cheeseshop.python.org/pypi/SQLObject/0.8.1

News and changes:
http://sqlobject.org/News.html


What's New
==========

News since 0.8.0
----------------

* Documentation updates

Small Features
--------------

* For MySQLdb 1.2.2+ call ping(True) on the connection to allow
  autoreconnect after a timeout.

Bug Fixes
---------

* Another round of changes to create/drop the tables in the right order
  in the command-line client `sqlobject-admin`.

* Fixed a bug in UnicodeField - allow comparison with None.

* ID columns are reverted back from INT UNSIGNED to INT for MySQL to be in
  accord with FOREIGN KEYs.

* Fixed return value from Firebird/MaxdbConnection.createTable().

* Fixed and simplified DatabaseIndex.get().

* Fixed ConnectionHub.doInTransaction() - close low-level connection on
  commit() to prevent connections leaking.

For a more complete list, please see the news:
http://sqlobject.org/News.html

Oleg.
-- 
     Oleg Broytmann            http://phd.pp.ru/            phd at phd.pp.ru
           Programmers don't die, they just GOSUB without RETURN.


From aahz at pythoncraft.com  Wed Mar 14 17:21:05 2007
From: aahz at pythoncraft.com (Aahz)
Date: 14 Mar 2007 14:21:05 -0700
Subject: How to Start a (thread?) and Leave
References: <1173471722.668943.126700@h3g2000cwc.googlegroups.com>
	<1173472226.698504.147260@h3g2000cwc.googlegroups.com>
	<1173473154.354891.97530@t69g2000cwt.googlegroups.com>
	<1173473845.525128.119160@8g2000cwh.googlegroups.com>
Message-ID: <et9p01$bap$1@panix3.panix.com>

In article <1173473845.525128.119160 at 8g2000cwh.googlegroups.com>,
gregpinero at gmail.com <gregpinero at gmail.com> wrote:
>
>I'm leaning towards os.startfile right now.  I also see some os.spawn
>beasties in there but I don't understand those.

Try the subprocess module
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

"I disrespectfully agree."  --SJM


From zzhao at laika.com  Thu Mar  8 20:26:59 2007
From: zzhao at laika.com (ZiZi Zhao)
Date: Thu, 8 Mar 2007 17:26:59 -0800
Subject: list of dictionary in embedded Python
Message-ID: <ACCA22ED08500745AE88FEDED5B6F2EA02BC0B4F@exchange.wvs>

I tried to build a list of dictionaries using embedded Python2.5 
in the following way to append dictionaries to a list.

Py_Object *pList = PyList_New(0);

for (i=0; i<MAXSIZE; i++) {
    Py_Object *pDict = PyDict_New();
    // 
    // build this dictionary of keys & values
    // 
    if (pDict != NULL) {
        if (PyList_Append(pList, pDict) < 0) {
            printf ("Failed to append new dict to dict-list\n");
        }
        Py_DECREF(pDict);
    }
}

In this way, I found the PyList_Append only appends the pointer 
of pDict to pList. 

After Py_DECREF(pDict) and going back to, 
Py_Object *pDict = PyDict_New();
for next run in loop, it gets the same pointer as last time, 
which finally makes all dictionaries in the list are the same 
as the last one. (BTW, in Python, the result is correct.)

What goes wrong? 

Now, I have to do no Py_DECREF(pDict) in the loop, but do once at 
the end, when the loop is finished, like 

Py_Object *pDict;
for (i=0; i<MAXSIZE; i++) {
    pDict = PyDict_New();
    // 
    // build this dictionary of keys & values
    // 
    if (pDict != NULL) {
        if (PyList_Append(pList, pDict) < 0) {
            printf ("Failed to append new dict to dict-list\n");
        }
    }
}
Py_DECREF(pDict);

In this way, would it cause memory leak?

Thanks in advance for help!



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From roger.miller at nova-sol.com  Thu Mar 29 16:39:07 2007
From: roger.miller at nova-sol.com (Roger Miller)
Date: 29 Mar 2007 13:39:07 -0700
Subject: Weird gcc behaviour with function pointer types
In-Reply-To: <571s0vF2aird9U1@mid.individual.net>
References: <571s0vF2aird9U1@mid.individual.net>
Message-ID: <1175200747.215417.48260@o5g2000hsb.googlegroups.com>

On Mar 29, 3:05 am, greg <g... at cosc.canterbury.ac.nz> wrote:
> In my quest to eliminate C compiler warnings from
> Pyrex output, I've discovered some utterly bizarre
> behaviour from gcc 3.3.
>
> The following code:
>
>    void g(struct foo *x) {
>    }
>
>    void f(void) {
>      void (*h)(struct foo *);
>      h = g;
>    }
>
> produces the following warning:
>
>    blarg.c: In function `f':
>    blarg.c:6: warning: assignment from incompatible pointer type
>
> However, adding the following line at the top:
>
>    typedef struct foo Foo;
>
> makes the warning go away. The mere *presence* of
> the typedef is all that's needed -- it doesn't even
> have to be used.
>
> This looks like a bug in gcc to me -- what do people
> think?
>
> --
> Greg

If there is no outer declaration of struct foo visible to both
functions
gcc is right (it usually is when it comes to C technicalities).  The
scope
of a struct declared inside a parameter list is limited to the
parameter
list itself, so the two "struct foo"s are technically different types.
Adding the typedef provides a common declaration of struct foo that is
shared by both functions.  You don't really even need a typedef; a
global
declaration of just "struct foo;" should make the problem go away.

I would have expected gcc to also warn you about declaring a struct
inside
a parameter list.  Did you get any warnings like that?



From vegaseat at yahoo.com  Fri Mar  2 13:27:24 2007
From: vegaseat at yahoo.com (vegaseat at yahoo.com)
Date: 2 Mar 2007 10:27:24 -0800
Subject: tkinter what do you use?
In-Reply-To: <op.tokljouwrqur0o@eb.pragmadev>
References: <es9f6i$660$1@ss408.t-com.hr><op.tokljouwrqur0o@eb.pragmadev>
Message-ID: <1172860044.934993.180470@n33g2000cwc.googlegroups.com>

On Mar 2, 8:32 am, "Eric Brunel" <eric_bru... at despammed.com> wrote:
> On Fri, 02 Mar 2007 16:17:32 +0100, Gigs_ <g... at hi.t-com.hr> wrote:
> > list = Listbox()
> > list.insert('end', x)
> > list.insert(END, x)
>
> > what do you use 'end' or END?
> >>> from Tkinter import END
> >>> END == 'end'
>
> True
>
> So this isn't really important... My personal usage varies: for your use  
> case, I tend to use the symbolic constant (END); for sticky options in  
> grids, I tend to use the strings ('nswe' is shorter than N+S+W+E, not to  
> mention tk.N+tk.S+tk.W+tk.E).
> --
> python -c "print ''.join([chr(154 - ord(c)) for c in  
> 'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"

When you use other modules like PIL with Tkinter, it is best to give
Tkinter a namespace.  This way you keep track where things are coming
from.  I prefer 'import Tkinter as tk' then it is much simpler to use
'end' or 'nswe'.  Otherwise you have to use tk.END or God forbit tk.N
+tk.S+tk.W+tk.E -- see what I mean?



From pnmoslo at gmail.com  Fri Mar  9 04:54:17 2007
From: pnmoslo at gmail.com (pnm)
Date: 9 Mar 2007 01:54:17 -0800
Subject: Python not processing .pth files
Message-ID: <1173434057.498598.60070@s48g2000cws.googlegroups.com>

This one I do not understand -- does anyone have any suggestions?


Newly compiled untweaked Python2.5 is not processing .pth files (as
far as I can see _any_ .pth files in site-packages. Example:.

+++++++++++++++

paul at phost:/usr/local/lib/python2.5/site-packages$ ls setup*
-rw-r--r--  1 root staff 306K Mar  8 20:44 setuptools-0.6c3-py2.5.egg
-rw-rw-rw-  1 root staff   29 Mar  8 23:57 setuptools.pth
paul at phost:/usr/local/lib/python2.5/site-packages$ cat setuptools.pth
./setuptools-0.6c3-py2.5.egg
paul at phost:/usr/local/lib/python2.5/site-packages$ python2.5
Python 2.5 (r25:51908, Mar  8 2007, 22:34:54)
[GCC 3.3.5 (Debian 1:3.3.5-13)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import setuptools
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named setuptools
>>> import sys
>>> sys.path
['', '/usr/local/lib/python25.zip', '/usr/local/lib/python2.5', '/usr/
local/lib/python2.5/plat-linux2', '/usr/local/lib/python2.5/lib-tk', '/
usr/local/lib/python2.5/lib-dynload', '/usr/local/lib/python2.5/site-
packages']
>>>

+++++++++++++++++



From kyosohma at gmail.com  Sat Mar 24 13:46:18 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 24 Mar 2007 10:46:18 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <1174758378.274917.170690@p15g2000hsd.googlegroups.com>

On Mar 24, 11:30 am, "Robert Hicks" <sigz... at gmail.com> wrote:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.
>
> Robert

Windows allows us to uninstall it. I think the only thing it really
installs is the files, and then it sets the system path, so just
delete the files and change your path. Unfortunately, I do not have a
Mac to test with.

Mike



From likwoka at gmail.com  Tue Mar  6 01:02:59 2007
From: likwoka at gmail.com (Alex Li)
Date: 5 Mar 2007 22:02:59 -0800
Subject: Graphviz Python Binding for Python 2.5 on Windows?
In-Reply-To: <45eca530$0$27390$ba4acef3@news.orange.fr>
References: <1173132974.311859.273130@c51g2000cwc.googlegroups.com>
	<45eca530$0$27390$ba4acef3@news.orange.fr>
Message-ID: <1173160979.344083.91030@n33g2000cwc.googlegroups.com>

Thanks Michel, I will give it a try.

Alex





From roman.yakovenko at gmail.com  Fri Mar  9 10:40:47 2007
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Fri, 9 Mar 2007 17:40:47 +0200
Subject: C++ and Python
In-Reply-To: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>
Message-ID: <7465b6170703090740s2c92a7b9n2411e38fd1e836f8@mail.gmail.com>

On 8 Mar 2007 22:04:48 -0800, bressert at gmail.com <bressert at gmail.com> wrote:
> Hi Everyone,
>
> I'm considering about generating some Python Bindings for C++
> libraries. What are considered the best tools for doing something like
> this? I know that there are SWIG, SIP, Boost.Python, and GCC_XML.

If you ask me than Boost.Python and Py++(
http://language-binding.net/pyplusplus/pyplusplus.html)
is the way to go. I collected few links to articles that compare between
different tools:
http://language-binding.net/pyplusplus/comparisons/compare_to.html

Until recently there was not big library written in C++, which was exposed
to Python
using different tools. Today there are two projects, which expose same
source code
 to Python. The exposed library is Ogre - a scene-oriented, flexible 3D
engine, pretty big
and complex project.

The first solution, PyOgre, uses SWIG, while the second one uses Py++.
The link I gave earlier contains links to the projects CVS's. It worse to
take a
look on them and compare.

P.S. Take all what I say with caution, because I am the author of Py++.

-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/
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From attn.steven.kuo at gmail.com  Sat Mar 31 12:14:13 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 31 Mar 2007 09:14:13 -0700
Subject: Sorting a multidimensional array by multiple keys
In-Reply-To: <pan.2007.03.31.13.42.19@no.spam.plz>
References: <pan.2007.03.31.12.43.14@no.spam.plz>
	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
	<pan.2007.03.31.13.42.19@no.spam.plz>
Message-ID: <1175357653.207415.208390@q75g2000hsh.googlegroups.com>

On Mar 31, 6:42 am, Rehceb Rotkiv <reh... at no.spam.plz> wrote:

(snipped)

> As each line consists of 5 words, I would break up the data into an array
> of five-field-arrays (Would you use lists or tuples or a combination in
> Python?). The word "BUT" would be in the middle, with two fields/words
> left and two fields/words right of it. I then want to sort this list by
>
> - field 3
> - field 4
> - field 1
> - field 0



import StringIO

buf = """
reaction is BUT by the
sodium , BUT it is
sea , BUT it is
this manner BUT the dissolved
pattern , BUT it is
rapid , BUT it is
""".lstrip()

mockfile = StringIO.StringIO(buf)

tokens = [ line.split() + [ line ] for line in mockfile ]
tokens.sort(key=lambda l: (l[3], l[4], l[1], l[0]))
for l in tokens:
    print l[-1],


--
Hope this helps,
Steven



From kyosohma at gmail.com  Tue Mar 27 11:16:27 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 27 Mar 2007 08:16:27 -0700
Subject: Please help!! SAXParseException: not well-formed (invalid token)
In-Reply-To: <1175007585.758109.127490@r56g2000hsd.googlegroups.com>
References: <1175007585.758109.127490@r56g2000hsd.googlegroups.com>
Message-ID: <1175008587.157218.194520@l77g2000hsb.googlegroups.com>

On Mar 27, 9:59 am, jvictor... at yahoo.fr wrote:
> I've been using the xml.sax.handler module to do event-driven parsing
> of XML files in this python application I'm working on. However, I
> keep having really pesky invalid token exceptions. Initially, I was
> only getting them on control characters, and a little "sed -e 's/
> [^[:print:]]/ /g' $1;" took care of that just fine. But recently, I've
> been getting these invalid token excpetions with n-tildes (like the n
> in Espa?a), smart/fancy/curly quotes and other seemingly harmless
> characters. Specifying encoding="utf-8" in the xml header hasn't
> helped matters.
>
> Any ideas? As a last resort, I'd be willing to scrub invalid
> characters.... it just seems strange that curly quotes and n-tildes
> wouldn't be valid XML! Is that really the case?
>
> TIA!
>
> Jason

Are you making sure to encode the strings you pass into the parser in
UTF-8 or UTF-16? This article was illuminating in that respect and may
be helpful in diagnosing your problem:

http://www.xml.com/pub/a/2002/11/13/py-xml.html?page=2

Mike



From h.b.furuseth at usit.uio.no  Fri Mar  9 04:38:29 2007
From: h.b.furuseth at usit.uio.no (Hallvard B Furuseth)
Date: Fri, 09 Mar 2007 10:38:29 +0100
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
	<1hud90j.zf49afwqrk0bN%aleax@mac.com>
	<45e9b753$0$8983$4c368faf@roadrunner.com>
	<1huecz7.1thcn0b1j64biiN%aleax@mac.com>
	<1172960883.340892.183850@31g2000cwt.googlegroups.com>
	<1hueupp.1dcf9wl17pyf2bN%aleax@mac.com>
	<1172973970.929910.111000@s48g2000cws.googlegroups.com>
	<1huew97.129d6nb4qmb42N%aleax@mac.com>
Message-ID: <hbf.20070309enzc@bombur.uio.no>

Alex Martelli writes:
> You make a good point.  I do like being able to say foo.bar=baz rather
> than foo['bar']=baz in certain cases -- not so much to save 3 chars, but
> to avoid excessive punctuation; however, I don't really need this AND
> all of dict's power at the same time, so, I don't inherit from dict:-).

Yes.  Attribute syntax looks nicer, in particular one implements a sort
of private "variables collected in a dict" thing (e.g. SQL field names)
but still wants some dict functionality.

Another variant I thought of would be to prefix dict methods with '_'
(except those that already start with '__') and (if implemented as a
dict subtype) also override the original names with a "sorry, use
_<foo>" error method.

(Posting a bit sporatically currently, disappearing for a week again
now.)

-- 
Hallvard


From bernala at gmail.com  Mon Mar 19 15:00:04 2007
From: bernala at gmail.com (Al)
Date: 19 Mar 2007 12:00:04 -0700
Subject: Pycron for windows - please help
Message-ID: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>

Hey all,

   I'm using Pycron for windows to run 5 scripts at various times of
the day, all of which work well.

I recently added a 6th job, a simply file copy operation, and it won't
run. Once the job is configured, I click the test execution button,
and it works fine. However, it won't run automatically.

I looked in the pycron.log file, and I noticed that for the entires of
my new job, I see "rc=4" and the end of each line. All other jobs have
"rc=0" at the end of the line. I assume then, that rc=4 is a reference
to an error code of some kind, but there is no information on this in
the readme.txt, at the pycron website, or here in groups.

Does anyone know how to troubleshhot this? Thanks in advance.

Al



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  8 01:33:28 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 08 Mar 2007 07:33:28 +0100
Subject: Bug in python!? persistent value of an optional parameter in
	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<7xfy8gqwof.fsf@ruckus.brouhaha.com>
	<NcLHh.5653$M65.1389@newssvr21.news.prodigy.net>
Message-ID: <559o7dF23d6poU1@mid.individual.net>

John Nagle wrote:

>     True.  It would make sense to disallow mutable values as
> initial values for optional arguments.  The present behavior
> is silly.

Why? You're free to only use immutables.

Regards,


Bj?rn

-- 
BOFH excuse #42:

spaghetti cable cause packet failure



From greg at cosc.canterbury.ac.nz  Thu Mar  1 04:11:35 2007
From: greg at cosc.canterbury.ac.nz (greg)
Date: Thu, 01 Mar 2007 22:11:35 +1300
Subject: design question: no new attributes
In-Reply-To: <3c5Fh.3664$Tg7.2156@trnddc03>
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05>
	<mailman.4475.1172614860.32031.python-list@python.org>
	<3c5Fh.3664$Tg7.2156@trnddc03>
Message-ID: <54njqjF21q8jlU1@mid.individual.net>

Alan Isaac wrote:

> class NothingNew:
>     a = 0
>     def __init__(self):
>         self.b = 1
>         self.initialized = True

There's a problem with that when you want to subclass:

   class NothingElseNew(NothingNew):

     def __init__(self):
       NothingNew.__init__(self)
       self.c = 42 # <--- Not allowed!

You could get around this by temporarily de-initializing
it, i.e.

     def __init__(self):
       NothingNew.__init__(self)
       del self.__dict__['initialized']
       self.c = 42
       self.initialized = True

but that's not very elegant.

--
Greg


From deets at nospam.web.de  Tue Mar  6 03:12:48 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 Mar 2007 09:12:48 +0100
Subject: persistent fifo queue class
In-Reply-To: <3240528.rhEsMVbDK6@teancum>
References: <3240528.rhEsMVbDK6@teancum>
Message-ID: <554m4vF22dgrpU2@mid.uni-berlin.de>

David Bear schrieb:
> I'm looking to see if there are any examples or prewritting fifo queue
> classes. I know this is a broad topic. I'm looking to implement a simple
> application where a web server enqueue and pickle using a local socket on
> to a 'queue server' -- and then I will have another application dequeue the
> pickles again using a local socket.

Why don't you use a DB for that? If you want pickles, use a  blob 
column. But all the rest - a defined protocol, stable server, 
transactions - you get for free.

Diez


From aleax at mac.com  Sun Mar 18 19:57:25 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 16:57:25 -0700
Subject: Renaming or Overloading In Python
References: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>
Message-ID: <1hv6kan.10g80dm1pnrh3dN%aleax@mac.com>

gamename <namesagame-usenet at yahoo.com> wrote:

> Hi,
> 
> I'm a recent convert from TCL.  One of the more powerful aspects of
> TCL is the ability to rename a function at will (generally for testing
> purposes).
> 
> Example from the tcl doc:
> 
> rename ::source ::theRealSource
> set sourceCount 0
> proc ::source args {
>     global sourceCount
>     puts "called source for the [incr sourceCount]'th time"
>     uplevel 1 ::theRealSource $args
> }
> 
> So, is such a thing possible in Python?

Assuming that source is a function previously defined in this scope, the
exactly equivalent Python snippet should be:

theRealSource = source
sourceCount = 0
def source(*args):
  global sourceCount
  sourceCount += 1
  print "called source for the %s'th time" % sourceCount
  return theRealSource(*args)

Others have already offered you other alternatives, but I thought you
might also be interested in a more direct/immediate translation.


Alex


From attn.steven.kuo at gmail.com  Mon Mar 12 13:55:20 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 12 Mar 2007 10:55:20 -0700
Subject: Newbie Question : "grep"
In-Reply-To: <45f5877c$1@nntp.zianet.com>
References: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
	<45f5864f$1@nntp.zianet.com> <45f5877c$1@nntp.zianet.com>
Message-ID: <1173722120.347200.37610@n33g2000cwc.googlegroups.com>

On Mar 12, 10:01 am, "Erik Johnson" <nob... at invalid.com> wrote:
> Sorry, I forgot to paste the modified version of my code in the post:. I
> think this is the same behaviour:
>
> for line in lines:
>     if "placed" in line:
>         if "i_a/i_b/ROM/" in line:
>             pos = (line.split()[4]).split("_")[1]
>             found = False
>
>             for (tag, (start, end)) in tags:
>                 if tag in line:
>                     found = True
>                     print "        i_a/i_b/ROM/%s [%i:%i] LOC =" %\
>                         (pos, tag, start, end)
>                     break
>
>             if not found:
>                 print "Error"



Instead of using a sentinal value (i.e., found),
one can use the 'else' clause of a 'for' loop...


pos = (line.split()[4]).split("_")[1]
for (tag, (start,end)) in tags:
    if tag in line:
        print "    i_a/i_b/ROM/%s [%i:%i] LOC=%s" %\
            (pos,tag,start,end)
        break
else
    print "Error"

--
Hope this helps,
Steven



From joshbloom at gmail.com  Wed Mar 21 15:38:15 2007
From: joshbloom at gmail.com (Josh Bloom)
Date: Wed, 21 Mar 2007 12:38:15 -0700
Subject: writing dictionaries to a file
In-Reply-To: <267820.93071.qm@web7813.mail.in.yahoo.com>
References: <267820.93071.qm@web7813.mail.in.yahoo.com>
Message-ID: <d25b6e9a0703211238n78ca6e8ev2c6d2ed65a735996@mail.gmail.com>

Where have you defined the relationship between the 2 dictionaries?

If you know that all the someys are related to the somex you can do
something like this:

somex = {'unit':'00', 'type':'processing'}

somey1 = {'comment':'fair', 'code':'aaa'}
somey2 = {'comment':'fair', 'code':'bbb'}
somey3 = {'comment':'fair', 'code':'ccc'}

# Put all the dicts in a List
dictList = []
dictList.append(somey1)
dictList.append(somey2)
dictList.append(somey3)

for dict in dictList: #Iterate over the lists
    print ("%s, %s") % (somex['unit'], dict['code']) #Print just the info
that you want

I'll leave writing it to a file as an exercise in Googling.
-Josh


On 3/21/07, kavitha thankaian <kavithapython at yahoo.co.in> wrote:
>
> Hi All,
>
> I have two dictionaries:
>
> somex:{'unit':00, type:'processing'}
>
> somey:{'comment':'fair', 'code':'aaa'}
> somey:{'comment':'good', 'code':bbb'}
> somey:{'comment':'excellent', 'code':'ccc'}
>
>
> now i would like to write this to a file in the following format(unit,
> code),,,the output should be as follows written to a file,,,
>
>           00, aaa
>           00, bbb
>           00, ccc
>
> can someone help me?
>
> Regards
> Kavitha
>
>
> ------------------------------
> Here's a new way to find what you're looking for - Yahoo! Answers<http://us.rd.yahoo.com/mail/in/yanswers/*http://in.answers.yahoo.com/>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From researchbase at gmail.com  Wed Mar 14 01:03:35 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Wed, 14 Mar 2007 10:33:35 +0530
Subject: help developing an editor to view openoffice files.
In-Reply-To: <et6unr$fd7$1@sea.gmane.org>
References: <mailman.5005.1173770157.32031.python-list@python.org>
	<et6g05$4av$1$8300dec7@news.demon.co.uk> <et6unr$fd7$1@sea.gmane.org>
Message-ID: <f81479dd0703132203m2b5037e5uf6dd22e7abb2a2c5@mail.gmail.com>

hello,
well what I exactly need to do is firstly have a way to read .odt and
.ods files.
I have a lot of information in open office format which I need to access.
The most important thing is that I completely want to avoid the use of
microsoft office.
so I need to firstly get access to open office documents through a
python module that can read and parse those documents and may be
convert it to html and display in some kind of an html/ text area may
be wxpython can help?
secondly I want to edit those documents may be in html format and then
when I say sayve it should save the changes back to .odt with the
formatting information.
can this be made possible?
thanks and regards,
Krishnakant.


From jstroud at mbi.ucla.edu  Thu Mar 15 04:04:13 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 15 Mar 2007 08:04:13 GMT
Subject: Box plot in Python
In-Reply-To: <mailman.5123.1173933486.32031.python-list@python.org>
References: <mailman.5123.1173933486.32031.python-list@python.org>
Message-ID: <167Kh.6054$Um6.1007@newssvr12.news.prodigy.net>

Sebastian Bassi wrote:
> Hello,
> 
> Is there a graphic package for Python that provides support for box 
> plots? (see
> http://en.wikipedia.org/wiki/Box_plot and
> http://en.wikipedia.org/wiki/Image:R-speed_of_light_boxplot.png for
> information on box plots).
> 
> I have N sets of data, each with X "points".
> Example:
> 
> Set 1:
> Point 1: 0.21
> Point 2: 0.92
> Point 3: 0.18
> Point 4: 0.12
> ... cut ....
> Point 203: 0.91
> 
> then:
> 
> Set 2:
> Point 1: 0.11
> Point 2: 0.3
> Point 3: 0.82
> Point 4: 0.11
> ... cut ....
> Point 191: 0.09
> 
> ....
> 
> I know that R would do it, but I don't know how to use R and would
> like to keep on working in Python.
> 
> Best,
> SB.

Have you considered rpy?

Also, pychart can do anything. You can do a boxplot in pychart if you 
are modestly creative.


From tjreedy at udel.edu  Mon Mar 19 16:36:40 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 Mar 2007 16:36:40 -0400
Subject: looking for a fastest parallel approach for quick executing of
	lotssmall routines
References: <1174335235.682491.300930@l75g2000hse.googlegroups.com>
Message-ID: <etms8l$8hi$1@sea.gmane.org>


"dmitrey" <openopt at ukr.net> wrote in message 
news:1174335235.682491.300930 at l75g2000hse.googlegroups.com...
| hi all,
| I'm looking for a way to execute a number (from 2 to thouzands,
| usually small) of python functions as quikly as it's possible.
|
| There seems to be lots of solutions, for example mentioned at
| http://www.cimec.org.ar/python/ , but first of all it would be very
| nice if the module is included into the scipy module or Python core,
| for to minimize additional software dependences.
| So what is the best choise? And if noone is included in Python
| standard distribution - why it is so and is anything intended in
| future Python versions: 2.6 or later?

Not many of use have Beowolf clusters, and the stuff there is experimental. 





From bj_666 at gmx.net  Fri Mar 30 12:42:03 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 30 Mar 2007 18:42:03 +0200
Subject: Inserting '-' character in front of all numbers in a string
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.30.16.42.03.969536@gmx.net>

In <1175269107.769945.241500 at r56g2000hsd.googlegroups.com>, kevinliu23
wrote:

> "2a 3ab" into "-2a -3ab".

In [8]: '-' + ' -'.join('2a 3ab 4xy'.split())
Out[8]: '-2a -3ab -4xy'

Ciao,
	Marc 'BlackJack' Rintsch


From bbxx789_05ss at yahoo.com  Sat Mar 24 23:24:36 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 20:24:36 -0700
Subject: functions, classes, bound, unbound?
Message-ID: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>

Here is some example code that produces an error:

class Test(object):
        def greet():
                print "Hello"

t = Test()
t.greet()
TypeError: greet() takes no arguments (1 given)

Ok.  That makes sense.  t.greet() is a "bound method", so something
automatically relays the instance object to greet(), and since greet()
is defined with no parameters-->Error.

Hmmm...I know from testing several examples that if I call a function
that's defined inside a class, and I use the class name preceding the
function call, then I have to send the instance manually.  So, based
on that error message, I'll just call the method using the class name
and not send the instance object:

Test.greet()

TypeError: unbound method greet() must be called with Test instance as
first argument (got nothing instead)



From mnations at gmail.com  Mon Mar  5 12:36:41 2007
From: mnations at gmail.com (Mudcat)
Date: 5 Mar 2007 09:36:41 -0800
Subject: Python stock market analysis tools?
In-Reply-To: <1173073290.907489.101150@t69g2000cwt.googlegroups.com>
References: <1173066776.884126.86810@64g2000cwx.googlegroups.com>
	<1173073290.907489.101150@t69g2000cwt.googlegroups.com>
Message-ID: <1173116201.713381.296270@30g2000cwc.googlegroups.com>


> What kind of tool do you want?  Getting quotes is the easy part:
>
> import urllib
> symbols = 'ibm jpm msft nok'.split()
> quotes = urllib.urlopen( 'http://finance.yahoo.com/d/quotes.csv?s='+
>          '+'.join(symbols) + '&f=l1&e=.csv').read().split()
> print dict(zip(symbols, quotes))
>
> The hard part is raising capital and deciding what to buy, sell, or
> hold.
>
> Raymond

Yeah, I have something that pulls quotes. So the data isn't hard to
get, but I'm not really interested in building the graphs. I was
hoping to find something already built with the common indicators
already built in that I could add my own to.



From gagsl-py2 at yahoo.com.ar  Fri Mar  9 22:40:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 00:40:24 -0300
Subject: bisect on a list of lists
References: <1173471342.957772@iceman.esoterica.pt>
	<mailman.4874.1173477506.32031.python-list@python.org>
	<pan.2007.03.10.02.45.50.662097@REMOVE.THIS.cybersource.com.au>
Message-ID: <op.toye5mxpx6zn5v@gabriel2.softlabbsas.com.ar>

En Fri, 09 Mar 2007 23:45:50 -0300, Steven D'Aprano  
<steve at REMOVE.THIS.cybersource.com.au> escribi?:

> On Fri, 09 Mar 2007 18:57:42 -0300, Gabriel Genellina wrote:
>
>> En Fri, 09 Mar 2007 17:15:44 -0300, Paulo da Silva
>> <psdasilvaX at esotericaX.ptX> escribi?:
>>
>>> What is the best way to have something like the bisect_left
>>> method on a list of lists being the comparision based on an
>>> specified arbitrary i_th element of each list element?
>>>
>>> Is there, for lists, something equivalent to the __cmp__ function for
>>> classes?
>>
>> lists *are* classes (at least since Python 2.2)
>
> Not quite. Classes and types are *almost* the same, but not exactly.

I were talking about new style classes, that's why I said Python 2.2

>>>> type(list)
> <type 'type'>
>>>> class Spam:
> ...     pass
> ...
>>>> type(Spam)
> <type 'classobj'>

py> class New(object): pass
...
py> type(New)
<type 'type'>

New-style clases are instances of type too (like list, tuple and other  
builtins), and subclasses of object:

py> New.mro()
[<class '__main__.New'>, <type 'object'>]
py> list.mro()
[<type 'list'>, <type 'object'>]

> Usually the difference doesn't make a difference, but sometimes it does.
>
>>>> Spam.x = 3
>>>> list.x = 3
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: can't set attributes of built-in/extension type 'list'

That's not because list is a builtin type, but because it lacks (by  
design) any means to store instance attributes (it has an empty  
tp_dictoffset slot, by example).
Functions, exceptions, modules are examples of builtin types whose  
instances can handle attributes.

-- 
Gabriel Genellina



From webmaven at cox.net  Sat Mar 10 12:10:36 2007
From: webmaven at cox.net (Michael Bernstein)
Date: Sat, 10 Mar 2007 09:10:36 -0800
Subject: [python-advocacy] A Pythonic Way to Measure and Improve Your 
	Programming Skills?
In-Reply-To: <a06230908c2187f182731@[192.168.1.242]>
References: <45F14D7E.3060707@taupro.com>
	<a06230908c2187f182731@[192.168.1.242]>
Message-ID: <1173546636.14230.57.camel@workshop>

On Sat, 2007-03-10 at 10:01 -0600, Brad Allen wrote:

> When I discussed this problem with Michael Bernstein at PyCon he suggested
> the idea of creating a "chroot jail" for each web session which could run
> the Python interpreter in a secure sandbox. That might be easier than giving
> each session a whole virtual server.

Note that this wasn't an original idea of mine, I got it from brief
mentions associated with two existing interactive python-in-a-web-page
implementations:

        Try Python: http://www.mired.org/home/mwm/try_python/
        
        TryPy: http://trac.pocoo.org/wiki/TryPy
        

- Michael R. Bernstein
  michaelbernstein.com




From rmcore at gmail.com  Thu Mar 22 01:42:22 2007
From: rmcore at gmail.com (Michael Bentley)
Date: Thu, 22 Mar 2007 00:42:22 -0500
Subject: Mastering Python
In-Reply-To: <q8oMh.15081$tD2.3516@newsread1.news.pas.earthlink.net>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
	<46018fd8$0$18018$426a74cc@news.free.fr>
	<q8oMh.15081$tD2.3516@newsread1.news.pas.earthlink.net>
Message-ID: <28E23E31-31D2-42B1-B76F-8F3BF5C743E0@gmail.com>

>>
> 	For future reference, and I hope you don't mind the lesson, the past
> tense of "bind" is "bound" (I can't state it as a firm rule, but many
> *ind words seem to go *ound: bind, find, wind [as in wrap, not blowing
> in the...], grind -> bound, found, wound [not to confuse with an
> injury], ground [not to confuse with dirt]... But mind -> minded <G>)
>

blind -> blound  # couldn't resist yet another counterexample ;-)








From steve at REMOVE.THIS.cybersource.com.au  Mon Mar 26 18:37:01 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Tue, 27 Mar 2007 08:37:01 +1000
Subject: how to abort on syntax errors
References: <46080186$0$14151$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <pan.2007.03.26.22.37.00.145246@REMOVE.THIS.cybersource.com.au>

On Mon, 26 Mar 2007 13:21:22 -0400, Josh wrote:

> I have a lot of except Exception, e statements in my code, which poses some 
> problems. One of the biggest is whenever I refactor even the triviallest 
> thing in my code.
> 
> I would like python to abort, almost as if it were a compile-time error, 
> whenever it cannot find a function, or if I introduced a syntax error. But, 
> instead, it merrily proceeds on its way.
> 
> Is there some idiom that you use in situations like these?

Yes. Don't use "except Exception".

Seriously. You almost always should only catch the specific type of
exception that you expect, and treat anything else as a real error and let
it actually halt the program. e.g. instead of something like this:

try:
    do_something_complicated()
except Exception, e:
    # Missing key or invalid index?
    print "Exception $s occurred!" % str(e)
    handle_missing_key_or_index()


do this:

try:
    do_something_complicated()
except KeyError:
    print "Lost key"
    handle_missing_key()
except IndexError:
    print "Missing key"
    handle_index_error()




In my opinion, the only real use for "except Exception" is something like
this:


if __name__ == "__main__"":
    try:
        main()
    except Exception:  # or just "except:"
        print "A fatal error occurred, but what it is is a secret."
        sys.exit(1)
    finally:
        cleanup()



-- 
Steven.



From bignose+hates-spam at benfinney.id.au  Wed Mar 28 23:56:39 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 29 Mar 2007 13:56:39 +1000
Subject: Modal value of an array
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
Message-ID: <877it0u2h4.fsf@benfinney.id.au>

"datta.abhirup at gmail.com" <datta.abhirup at gmail.com> writes:

> Hi
>
>  How can I find out the modal value in an array. That is the value
> which occurs maximum time in the sequence ..
>
> e.g. if my array has values like [2,3,2,2,2,4,2,2]  definitely the
> maximum time 2 occurs in the array. so this function should be able to
> return 2 as a result ..

That's not the only case though. What do you expect to be returned for
an input of ["eggs", "beans", "beans", "eggs", "spam"] ?

Assuming you want *a* mode value, and any one will do (e.g. any of
"spam", "eggs" or "beans" is okay), I'd write it this way as a first
guess:

    >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
    >>> counts = [(foo.count(val), val) for val in set(foo)]
    >>> counts
    [(2, 'eggs'), (1, 'beans'), (4, 'spam')]
    >>> sorted(counts)[-1]
    (4, 'spam')
    >>> sorted(counts)[-1][1]
    'spam'

    >>> foo = ["eggs", "beans", "beans", "eggs", "spam"]
    >>> counts = [(foo.count(val), val) for val in set(foo)]
    >>> sorted(counts)[-1][1]
    'eggs'

-- 
 \           "Anger makes dull men witty, but it keeps them poor."  -- |
  `\                                                   Elizabeth Tudor |
_o__)                                                                  |
Ben Finney


From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 18:19:40 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 10:19:40 +1100
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<0037D2CD-B88D-4785-B107-F630EBD9788E@gmail.com>
	<mailman.4637.1172963111.32031.python-list@python.org>
Message-ID: <pan.2007.03.03.23.19.31.646584@REMOVE.THIS.cybersource.com.au>

On Sat, 03 Mar 2007 18:13:18 -0500, jim-on-linux wrote:

> On Saturday 03 March 2007 15:56, Nicholas Parsons 
> wrote:
>> On Mar 3, 2007, at 3:49 PM, Paul Rubin wrote:
>> > Nicholas Parsons <parsons.nicholas1 at gmail.com> 
> writes:
>> >> I was just playing around in IDLE at the
>> >> interactive prompt and typed in dir({}) for
>> >> the fun of it.  I was quite surprised to see
>> >> a pop method defined there.  I mean is that
>> >> a misnomer or what?  From the literature,
>> >> pop is supposed to be an operation defined
>> >> for a stack data structure.  A stack is
>> >> defined to be an "ordered" list data
>> >> structure.  Dictionaries in Python have no
>> >> order but are sequences. Now, does anyone
>> >> know why the python core has this pop method
>> >> implemented for a dictionary type?
> 
> 
> aDict.pop(theKey)
>   'produce the value'
> 
> pop removes the  key:value  and produces the value 
> as results


Amazing. Absolutely amazing. Just goes to show that the ability to use
Linux doesn't require the sense to READ THE REST OF THE POST BEFORE
HITTING SEND. Not even the rest of the thread, just the post.

The Original Poster already knows that.


-- 
Steven.



From grahn+nntp at snipabacken.dyndns.org  Tue Mar 27 05:00:02 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 27 Mar 2007 09:00:02 GMT
Subject: __init__.py
References: <q8ydnRG5jr36-prbRVnzvA@telenor.com>
	<q8ydnRC5jr1a-prbRVnzvA@telenor.com>
Message-ID: <slrnf0hiab.3nr.grahn+nntp@frailea.sa.invalid>

On Mon, 26 Mar 2007 08:27:19 +0200, Tina I <tinaweb at bestemselv.com> wrote:
> Tina I wrote:
>> When looking at other peoples code (to learn from it) I keep seeing an 
>> empty file named "__init__.py". What's the purpose of this?
>> 
>> Thanks
>> Tina
>
> Duh! Never mind... found it.
> Kinda neat actually :)

/What/ was neat? It's polite in cases like this to explain what the
answer or solution was.

I have never seen an empty __init__.py, and I'd like to know what its
purpose could be.

BR,
/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From gagsl-py2 at yahoo.com.ar  Sun Mar 25 12:55:43 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 13:55:43 -0300
Subject: saving algorithm
References: <716957.8417.qm@web62012.mail.re1.yahoo.com>
Message-ID: <op.tpq7y5kux6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 20:42:33 -0300, mona bin jubair <dear_kandy at yahoo.com>  
escribi?:

>   i want to ask about the algorithm's steps of saving  
> games(sudoku,battleship)?

First determine what goes into the game "state" (that is, what defines the  
current state of the game). Perhaps you also want some history. Then, save  
that game state: using pickle, or a database, or even a simple  
ConfigParser file. See http://docs.python.org/lib/persistence.html

-- 
Gabriel Genellina



From joshua at eeinternet.com  Wed Mar 28 15:44:10 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Wed, 28 Mar 2007 11:44:10 -0800
Subject: Finding a module's sub modules at runtime
Message-ID: <460ab913$0$16387$88260bb3@free.teranews.com>

[If this is documented somewhere, please just point me there.  I googled on
the terms that made sense to me, and didn't find anything.]

So, I have:

ModTest
        __init__.py
        AModule.py
        BModule.py
        CModule.py

All works fine.  However, when I import ModTest, I would like it to discover
and store the names of the modules beneath it, and construct a list, say
mod_list, that I can access later to find the names of the sub-modules in
this module.  Kind of setting __all__ at run time, I guess (yes, I'm aware
of the case caveats).

I figured __init__.py coudl take its own __path__ and walk the directory to
find all .py files other than __init__.py, but that seemed hackish.  Is
there an "official" way to do this?  Or a better way?

To give "context:" all the modules will have classes that have the same
name, same methods etc.  One of the modules will be picked depending on
which implementation is needed.

Thanks!

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From nick at craig-wood.com  Tue Mar 27 01:34:45 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Tue, 27 Mar 2007 00:34:45 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<1174913318.298278.222300@l77g2000hsb.googlegroups.com>
Message-ID: <slrnf0gbc8.i3r.nick@irishsea.home.craig-wood.com>

irstas at gmail.com <irstas at gmail.com> wrote:
>  On Mar 26, 3:16 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> > But to make that work reliably, it has to be ensured that no sideeffects
> > occur while being in some_long_running_stuff. which doesn't only extend to
> > python itself, but also external modules and systems (file writing, network
> > communications...). Which can't be done, unless you use a time-machine.
> 
>  Hey hey, isn't the Python mantra that we're all adults here?

Yes the timeout could happen at any time, but at a defined moment in
the python bytecode interpreters life so it wouldn't mess up its
internal state.

>  It'd be the programmers responsibility to use only code that has no
>  side effects. I certainly can ensure that no side-effects occur in
>  the following code: 1+2. I didn't even need a time machine to do
>  that :P Or the primitive could be implemented so that Python throws
>  a TimeoutException at the earliest opportunity. Then one could
>  write except-blocks which deal with rolling back any undesirable
>  side effects. (I'm not saying such timeout feature could be
>  implemented in Python, but it could be made by modifying the
>  CPython implementation)

I don't think timeouts would be any more difficult that using threads.

It is impossible to implement reliably at the moment though because it
is impossible to kill one thread from another thread.  There is a
ctypes hack to do it, which sort of works...  It needs some core
support I think.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From tjreedy at udel.edu  Thu Mar 15 16:35:35 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 15 Mar 2007 16:35:35 -0400
Subject: problem with str()
References: <1173988141.493995.196780@n76g2000hsh.googlegroups.com>
Message-ID: <etcamm$uo6$1@sea.gmane.org>


"7stud" <bbxx789_05ss at yahoo.com> wrote in message 
news:1173988141.493995.196780 at n76g2000hsh.googlegroups.com...
|I can't get the str() method to work in the following code(the last
| line produces an error):

If you 'print str' here

| methodList = [str for str in names if callable(getattr(obj, str))]

and again here, you will see the problem; you have reassigned the name 
'str' to something else by using it in the list comp.  Hence the advice to 
never reuse
builtin names unless you mean to lose access to the builtin object.

|print str(getattr(obj, methodList[0]).__doc__)

Here I presume you want the builtin function.  Too bad... ;-)

Terry Jan Reedy





From steve at REMOVE.THIS.cybersource.com.au  Fri Mar  9 11:34:20 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sat, 10 Mar 2007 03:34:20 +1100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>

On Fri, 09 Mar 2007 06:44:01 -0800, cesco wrote:

> I have to generate a list of N random numbers (integer) whose sum is
> equal to M. If, for example, I have to generate 5 random numbers whose
> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> simple pattern or function in Python to accomplish that?

No, you'll have to program it yourself.

You might like to Google for the "coin change algorithm" for some hints on
how to accomplish this. It's not the same problem, but it might give you
some ideas on how to solve it.

The way to solve this problem also depends on what you mean by "random
numbers". For example, if the random numbers have to be uniformly
distributed (so that all numbers in the appropriate range are equally
likely to be picked), I think the only way to proceed is with the horribly
inefficient algorithm:

(1) Generate every possible list of N random numbers between 1 and the
maximum value allowed. If the maximum value is (say) 10, there will 10**N
such lists.

(2) Check each list's sum to see if it equals M, and eliminate it if it
doesn't.

That guarantees that the individual random numbers all have the same
probability, but the execution time will explode for large N.


If you relax the requirement that all the random numbers have the same
probability, you can use a heuristic that is biased towards picking
smaller numbers. E.g. something like this:

def make_sum(N, M):
    """Generate a random list of N ints that sum to M."""
    # WARNING: untested!

    def get_sum(M):
        # Returns a list of any length that sums to M.
        L = []
        while M > 0:
            n = random.randint(1, M)
            L.append(n)
            M -= n
        return L

    L = []
    while len(L) != N:
        L = get_sum(M)
    return L


This isn't a particularly good algorithm, since it will take a LONG time
to return a solution on average, but it should give you some clues towards
solving the problem more efficiently.

Another procedure might be to do something like the following:

We want to make a list of 5 numbers adding up to 50.
The first random number between 1 and 50 might be (say) 13.
So our list will consist of [13] plus a list of 4 numbers adding up to 37.
And so on...

There's a few subtleties which I'll leave to you.

Last but not least, another possible algorithm is to start with a list of
N numbers, regardless of whether or not they add to M, and then adjust
each one up or down by some amount until they sum to the correct value.



-- 
Steven.



From arnodel at googlemail.com  Fri Mar  2 12:03:08 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 2 Mar 2007 09:03:08 -0800
Subject: class declaration shortcut
In-Reply-To: <54qsj0F21kdccU1@mid.individual.net>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
	<54nlkgF21ft8aU3@mid.individual.net>
	<pan.2007.03.02.02.15.56.940730@REMOVEME.cybersource.com.au>
	<54qsj0F21kdccU1@mid.individual.net>
Message-ID: <1172854988.054997.264620@j27g2000cwj.googlegroups.com>

On Mar 2, 3:01 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> Steven D'Aprano wrote:
> > Overkill? Storage of a single attribute holding a (usually short)
> > string is overkill?
>
> No, but storing the first name a class is bound to in it is a bit
> of, IMHO.

Don't see it as the first name a class is bound to, but rather as the
name a class is defined as.
If class_object.__name__ == 'Foo' it means that somewhere in your code
there is a class definition:

class Foo:
    # stuff

Same for function: if function_object.__name__ == 'bar' it means that
somewhere you have

def bar(...):
    # stuff

(Of course this is not the case if you use another way to define
functions or classes, e.g. type() )

> > When you do that, you wouldn't expect the __name__ of
> > some.module.function to change to f, and it doesn't.
>
> But what is it for then? =) Showing the first name the class was
> bound to?

What I described above is quite useful I think.  The alternative
(anonymous classes) is that given an object myobj you have no means to
find out what its class is (by that I mean to be able to locate the
class definition in your source code), apart from stabbing in the dark
(i.e. trying type(myobj)==someclass until successful).

--
Arnaud



From rebeccagcox at gmail.com  Sun Mar 11 19:03:11 2007
From: rebeccagcox at gmail.com (rebeccagcox at gmail.com)
Date: 11 Mar 2007 16:03:11 -0700
Subject: war with china? a different approach?
In-Reply-To: <1169235241.943262.161690@51g2000cwl.googlegroups.com>
References: <noone-8828B8.15092815012007@newsgroups.comcast.net>
	<150120071507211273%dwbarnes@barnsco.com>
	<45AC73E8.4010504@mustang.org>
	<1hs1e5i.1l5vmdx1ih79a7N%peter@DIESPAMMERDIE.dk>
	<45acf752.33126625@news-server.houston.rr.com>
	<2-OdnVZn--tUhzDYnZ2dnUVZ_q_inZ2d@bresnan.com>
	<1hs27ig.1y5o47s3rgkltN%peter@DIESPAMMERDIE.dk>
	<5158etF1j0n5aU3@mid.individual.net>
	<45ae2bf1.112133906@news-server.houston.rr.com>
	<1hs3c73.1yxa7c3q12khkN%peter@DIESPAMMERDIE.dk>
	<jgkeegan-3F565A.20305218012007@individual.net>
	<1hs61zt.1f267j04r1ur2N%peter@DIESPAMMERDIE.dk>
	<jgkeegan-59B29A.21505218012007@individual.net>
	<51av2lF1j1dp8U1@mid.individual.net>
	<jgkeegan-C9ACA6.05090819012007@individual.net>
	<Xns98BD610993FA4Sandman@216.196.97.136>
	<jgkeegan-1CFDBB.11465019012007@individual.net>
	<45b101c8.82683109@news-server.houston.rr.com>
	<1169235241.943262.161690@51g2000cwl.googlegroups.com>
Message-ID: <1173654190.949881.5110@h3g2000cwc.googlegroups.com>

Are you there, cause I don't want to waste my time writing a response
to that if you're not there anymore. Please respond w/ a new post if
you do check this.




From Joshua.R.English at gmail.com  Mon Mar  5 12:51:12 2007
From: Joshua.R.English at gmail.com (Joshua.R.English at gmail.com)
Date: 5 Mar 2007 09:51:12 -0800
Subject: list-like behaviour of etree.Element
In-Reply-To: <mailman.4668.1173085252.32031.python-list@python.org>
References: <mailman.4658.1173041314.32031.python-list@python.org>
	<1173080656.077853.249520@8g2000cwh.googlegroups.com>
	<mailman.4668.1173085252.32031.python-list@python.org>
Message-ID: <1173117071.995559.268240@n33g2000cwc.googlegroups.com>

On Mar 5, 1:00 am, "Fredrik Lundh" <fred... at pythonware.com> wrote:
> Raymond Hettinger wrote:
> > On Mar 4, 12:48 pm, "Daniel Nogradi" <nogr... at gmail.com> wrote:
> >> The etree.Element (or ElementTree.Element) supports a number of
> >> list-like methods: append, insert, remove. Any special reason why it
> >> doesn't support pop and extend (and maybe count)?
>
> > Those methods would not be hard to add.  Perhaps, submit a feature
> > request to Fredrik Lundh on SourceForge and see what he thinks there
> > is merit in more closely emulating the list API.  Of the methods you
> > listed, the case is probably strongest for extend().
>
> extend() will be in the next release:
>
>    http://effbot.org/zone/elementtree-changes-13.htm
>
> (lxml.etree already has it, btw).
>
> not sure I see the point of pop() and count().  a successful feature request
> would need to include some really compelling use cases.
>
> </F>

Pop could be useful.  I could use it.

I'm working on a story and submission tracker.  It stores everything
in XML and I use a sax parser to build reports.  If I have to update
one bit of data (say, a submission returns a sale) I have to use a
nasty extraction program that returns the submission node AND the rest
of the document (minus that node).  Then I make the changes of the
individual submission, and append it to the end of submissions data
document.  (I don't care about the order of items in the file, since
my reporting methods re-order everything anyway.)

Josh



From Graham.Dumpleton at gmail.com  Mon Mar 26 22:41:41 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: 26 Mar 2007 19:41:41 -0700
Subject: Python C extension providing... Python's own API?
In-Reply-To: <1174957359.286188.178330@y66g2000hsf.googlegroups.com>
References: <1174936892.381509.178770@p15g2000hsd.googlegroups.com>
	<1174942538.061137.93130@r56g2000hsd.googlegroups.com>
	<1174957359.286188.178330@y66g2000hsf.googlegroups.com>
Message-ID: <1174963301.590013.167030@r56g2000hsd.googlegroups.com>

On Mar 27, 11:02 am, "Adam Atlas" <a... at atlas.st> wrote:
> On Mar 26, 4:55 pm, "Matimus" <mccre... at gmail.com> wrote:
>
> > I think that is what the "code" module is for. Maybe not exactly what
> > you were expecting, but the capability you describe is already there.
> > Being able to access its own interpreter is one of the things that
> > makes Python a  dynamic language.
>
> That's not really what I'm after. Believe me, I've searched the
> standard library in length and breadth. :) The `code` module runs in
> the same interpreter, basically executing as though it were just a
> separate module (except interactively). What I'm interested in is
> accessing Python's C API for CREATING interpreters -- i.e. whatmod_pythonor anything else embedding the Python interpreter would do.
> Creating a whole environment, not just a module; it has its own `sys`
> parameters, its own `__builtin__`, and so on, so you can safely mess
> with those without changing them in the parent interpreter.
>
> So far, I've tried ctypes, and it doesn't work; then I noticed the
> docs said it wouldn't anyway. But I think I'll try writing a C
> extension module. This could be interesting for sandboxing &c.

Having played around in that area more than most I would say it would
be entirely possible to create a C extension module for Python that
would allow one to create additional sub interpreters. The question
only becomes how does one want to make use of it and make the
interface look like.

A simple interface may be to direct that in named sub interpreter
import this module. If named sub interpreter didn't exist then it
would be created. To have code run in the separate interpreter on an
ongoing basis, the imported module could create a thread. Personally
though I don't like triggering side affects from module import, so
might be better to say import this module and if that is successful
then call named object in that module with specified arguments. The
latter is better in that it allows data to be passed across as well,
although you would want to limit to basic data types for various
reasons.

The only tricky issues in this are ensuring that thread state is given
up when calling out of the first interpreter and ensuring that new
thread state is created against the new interpreter before calling
into it. You can't use the same thread state as then you get into
issues with exceptions about running in restricted mode.

Another issue to contend with is whether you allow sub interpreters to
be deleted. This can be tricky for various reasons. First is that when
deleting sub interpreters anything registered with atexit.register()
isn't run as that only happens for main Python interpreter, but one
can ensure they are by calling sys.exitfunc() within that sub
interpreter. Even then, if you have separate threads running in that
sub interpreter and they don't register an atexit function to allow
themselves to be killed, it could hang the attempt to delete the sub
interpreter. Even if that works, you may find that some third party
extension modules can't cope with sub interpreters being killed
through caching of the interpreter reference, something that might end
up point elsewhere after the sub interpreter is killed.

There are also other little minor details that one has to worry about
like providing a sys.argv as sub interpreters don't have that but some
Python modules blindly expect to be able to access it even though they
aren't the actual main function of a program. Also possibly need to
restrict access to sys.stdin from sub interpreters and only allow main
interpreter to use it etc etc.

Anyway, what you want to do is something I have thought about before
in relation to  mod_wsgi and whether there is any use for the ability
to call between sub interpreters. In the context of mod_wsgi though
such a thing is probably just an avenue for creating more mischief,
especially within a hosting environment where different peoples
applications may be running in different sub interpreters.

On the other hand, it might be useful in a standalone Python based
WSGI web server which you have more direct control over.  It might
take a bit of design work as to how to do it in practice, but you
could create different sub interpreters through the module for
distinct WSGI applications. The main interpreter could be running the
web server and somehow then hand off a WSGI environ etc off to a
manager module in the other sub interpreter that then deals with
communicating with the WSGI application in that sub interpreter for
that specific request. You could conceivably have a hand off
arrangement whereby when an application code base changes that you
start routing requests for URL subset to new instance of application
in new sub interpreter and kill off old sub interpreter when able to.
Would certainly be an interesting area to look at. For mod_wsgi at
least though I ruled out allowing sub interpreters to be killed off
and allowing reloading of a complete application by such a handoff
mechanism as too dangerous a feature in an ISP based web hosting
environment as user code could too easily hang the Apache process when
trying to kill off the sub interpreter.

Anyway, you have got my curiosity going again as to how hard it would
be to write such a module. Personally I don't think it would be that
hard at all and maybe when I get first version of mod_wsgi out I might
have a play with the idea. :-)

Graham



From hg at nospam.org  Tue Mar 13 16:17:54 2007
From: hg at nospam.org (hg)
Date: Tue, 13 Mar 2007 21:17:54 +0100
Subject: Problem I have with a while loop/boolean/or
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
Message-ID: <EWIJh.6070$Ng1.5147@newsfe19.lga>

israphelr at googlemail.com wrote:

> Hi all.
> 
> I have a problem with some code :(
> 
> -----------
> 
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
> 
> while (hint != 'n') or (hint != 'y'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> so everytime I run the program, and enter my choice as y or n, I'm
> told to 'Please Specify a valid Choice Again' and can't get out of the
> loop.
> 
> 
> 
> -----------
> 
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
> 
> while (hint != 'n'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> As for here when I enter n, I can leave the while loop.
> 
> Anyway I can't put my finger on this, so I'd be real grateful if
> someone could tell me what I've done wrong. Thanks.
> (I have a guy feeling it's something really silly I'm overlooking...)

Hi,

Whatever hint is:
(hint != 'n') or (hint != 'y')
is always going to be true

as it cannot really be both at the same time 

use "and" instead of "or"

hg








From Emile.Boudreau at cognos.com  Wed Mar 21 13:56:53 2007
From: Emile.Boudreau at cognos.com (Boudreau, Emile)
Date: Wed, 21 Mar 2007 13:56:53 -0400
Subject: 2 Command prompt at the same time
Message-ID: <09042D621CD4AA479C678463F3A646D0E887DC@sottemail1.ent.ad.cognos.com>

Hello,
	I have two batch files and I'm trying to run them in parallel. I
haven't been able to find any information on how to make python open 2
command prompt and then make each prompt run one of the batch files.

Can anyone point me in the right direction?

Thanks,

Emile Boudreau
 
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From winston.yang at netrics.com  Wed Mar 28 10:52:31 2007
From: winston.yang at netrics.com (winston.yang at netrics.com)
Date: 28 Mar 2007 07:52:31 -0700
Subject: using PyUnit to test with multiple threads
Message-ID: <1175093551.424032.283400@y80g2000hsf.googlegroups.com>

Is it possible to use PyUnit to test with multiple threads?

I want to send many commands to a database at the same time. The order
of execution of the commands is indeterminate, and therefore, so is
the status message returned.

For example, say that I send the commands "get" and "delete" for a
given record to the database at the same time. If the get executes
before the delete, I expect a success message (assuming that the
record exists in the database). If the delete executes before the get,
I expect a failure message.

Is there a way to write tests in PyUnit for this type of situation?

Thank you in advance.

Winston



From rdm at rcblue.com  Sat Mar 10 05:32:21 2007
From: rdm at rcblue.com (Dick Moores)
Date: Sat, 10 Mar 2007 02:32:21 -0800
Subject: number generator
In-Reply-To: <1173453432.893222.308610@j27g2000cwj.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
Message-ID: <20070310103226.4B3CC1E4002@bag.python.org>

At 07:17 AM 3/9/2007, cesco wrote:
>On Mar 9, 3:51 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> > "cesco" <fd.calabr... at gmail.com> writes:
> > > I have to generate a list of N random numbers (integer) whose sum is
> > > equal to M. If, for example, I have to generate 5 random numbers whose
> > > sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> > > simple pattern or function in Python to accomplish that?
> >
> > Erm, yes, lots of ways, there are probably further constraints on the
> > problem, such as the size of the integers, how the lists are supposed
> > to be distributed, etc.  Can you be more specific?  Is this for an
> > application?  If it's a homework problem, that's fine, but it's better
> > in that case for respondents to suggest hints rather than full solutions.
>
>Given two positive integers, N and M with N < M, I have to generate N
>positive integers such that sum(N)=M. No more constraints.

So why not just repeatedly call a function to generate lists of 
length N of random integers within the appropriate range (the closed 
interval [1,M-N-1]), and return the first list the sum of which is M? 
I don't understand what all the discussion is about. Time is not one 
of the constraints.

Dick Moores 



From eric_brunel at despammed.com  Fri Mar  2 03:39:50 2007
From: eric_brunel at despammed.com (Eric Brunel)
Date: Fri, 02 Mar 2007 09:39:50 +0100
Subject: Tkinter menus
References: <es76c6$5bo$1@ss408.t-com.hr> <es7gvd$m3$1@zinnia.noc.ucla.edu>
Message-ID: <op.tojzoomirqur0o@eb.pragmadev>

On Thu, 01 Mar 2007 22:35:40 +0100, James Stroud <jstroud at mbi.ucla.edu>  
wrote:
> Gigs_ wrote:
>> class MenuDemo(Frame):
>>     def __init__(self, parent=None):
>>         Frame.__init__(self, parent)
>>         self.pack(expand=YES, fill=BOTH)
>>         self.createWidgets()
>>      def createWidgets(self):
>>         self.makeMenuBar()
>>         self.makeToolBar()
>>         L = Label(self, text='Menu and Toolbar demo')
>>         L.config(relief=SUNKEN, width=40, height=10, bg='white')
>>         L.pack(expand=YES, fill=BOTH)
>>      def makeMenuBar(self):
>>         self.menubar = Menu(self.master)        #here
>>         self.master.config(menu=self.menubar)   #here
>>         self.fileMenu()
>>         self.editMenu()
>>         self.imageMenu()
>>  why i need to use self.master?
>> why i cant just use self?
>>  thx
>
> master is a reference to a Tk() or Toplevel(). Frames do not contain  
> menus, but the windows that contain them do.

This is the main reason why I always rant about examples of Tkinter  
programming creating windows by sub-classing Frame: frames are not  
windows. If you want to create a window, sub-class Toplevel (or Tk), not  
Frame. A frame is a general-purpose container. It can be sub-classed to  
create new "mega-widgets" that can be used in any context. This is  
obviously not the case in the code above, as the parent passed to any  
instance of MenuDemo *must* be a Toplevel or Tk. So just write:

class MenuDemo(Toplevel):
   def __init__(self):
     Toplevel.__init__(self)
     ...
   def makeMenuBar(self):
     self.menubar = Menu(self)
     self.config(menu=self.menubar)
     ...

and your life will be easier ;-)

HTH
-- 
python -c "print ''.join([chr(154 - ord(c)) for c in  
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])"


From ken at theoryyalgebra.com  Thu Mar  8 01:49:39 2007
From: ken at theoryyalgebra.com (Ken Tilton)
Date: Thu, 08 Mar 2007 01:49:39 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <jaKHh.1974$uo3.161@newssvr14.news.prodigy.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<LWHHh.1355$_a1.157@bignews7.bellsouth.net>
	<jaKHh.1974$uo3.161@newssvr14.news.prodigy.net>
Message-ID: <7mOHh.3099$h73.2536@newsfe12.lga>



John Nagle wrote:
> Brian Adkins wrote:
> 
>> John Nagle wrote:
> 
> 
>> If you want to restart a debate, please go back and reply to some 
>> serious post in the thread - don't hijack mine for your own evil 
>> purposes and cut out the good parts - did you even see the movie?
> 
> 
>    If you want to post jokes...

fer chrissakes, it was the OP of "means what you think it means" who was 
obviously doing Princess Bride and being reasonably funny, Brian just 
missed that it was deliberate.

, try ...

....comp.lang.lisp. All the SBCL bug reports are starting to drag down 
the mood of this NG.

kt

-- 
Well, I've wrestled with reality for 35 years, Doctor, and
I'm happy to state I finally won out over it.
                                   -- Elwood P. Dowd

In this world, you must be oh so smart or oh so pleasant.
                                   -- Elwood's Mom


From soarnil at gmail.com  Fri Mar 23 03:36:43 2007
From: soarnil at gmail.com (soarnil)
Date: 23 Mar 2007 00:36:43 -0700
Subject: Need help to learn Python
In-Reply-To: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
References: <1174626206.083519.294730@y66g2000hsf.googlegroups.com>
Message-ID: <1174635403.180071.221090@e1g2000hsg.googlegroups.com>

On 3?23?, ??1?03?, "PythonBiter" <tpar... at gmail.com> wrote:
> Hi everyone,
>
> I'm very new in this Group as well Python language. I want to learn
> Python. So could you please advice me, and guide me how can i become
> master in Python !
>
> Thanks,
> Partha

Programming Python 3ed Edition is a great book.



From anton.vredegoor at gmail.com  Mon Mar 26 10:49:23 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Mon, 26 Mar 2007 16:49:23 +0200
Subject: A better webpage filter
In-Reply-To: <mailman.5624.1174913357.32031.python-list@python.org>
References: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl>
	<87ps6x2c07.fsf@pobox.com>	<eu82dm$j48$2@news6.zwoll1.ov.home.nl>
	<mailman.5624.1174913357.32031.python-list@python.org>
Message-ID: <eu8mhh$m58$1@news1.zwoll1.ov.home.nl>

Gabriel Genellina wrote:

> If you don't mind using JavaScript instead of Python, UserJS is for you:  
> http://www.opera.com/support/tutorials/userjs/

My script loads a saved copy of a page and uses it to open an extra tab 
with a filtered view. It also works when javascript is disabled.

A.


From bj_666 at gmx.net  Thu Mar 15 14:51:57 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 15 Mar 2007 19:51:57 +0100
Subject: right-format of integer output as text
References: <1173984339.188538.200880@l75g2000hse.googlegroups.com>
Message-ID: <pan.2007.03.15.18.51.57.460777@gmx.net>

In <1173984339.188538.200880 at l75g2000hse.googlegroups.com>, dmitrey wrote:

> how can I implement this one in the simpliest way?
> Thank you in advance,

In [45]: '%10d' % 1
Out[45]: '         1'

In [46]: '%10d' % 42
Out[46]: '        42'

In [47]: '%10d' % 10000
Out[47]: '     10000'

Ciao,
	Marc 'BlackJack' Rintsch


From B.Ogryczak at gmail.com  Thu Mar 22 12:36:51 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 22 Mar 2007 09:36:51 -0700
Subject: Printing __doc__
In-Reply-To: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
Message-ID: <1174581410.996626.134660@e65g2000hsc.googlegroups.com>

On Mar 21, 8:47 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
> Greetings,
>
> Don't know the daily limit for dumb questions so I will ask one or
> more.
>
> In a function I can use the statement n =
> sys._getframe().f_code.co_name to get the name of the current
> function. Given that I can get the name how can I print the __doc__
> string? I cant use the following, it will tell me to bugger off as the
> string has no such attribute.
>
> def spam(self):
>     n = sys._getframe().f_code.co_name
>     print n.__doc__      #Wrong
>     print __doc__         #No good either
>     #....

print eval(n+'.__doc__')






From deets at nospam.web.de  Sun Mar 18 15:22:51 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Sun, 18 Mar 2007 20:22:51 +0100
Subject: Renaming or Overloading In Python
In-Reply-To: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>
References: <1174245472.666094.36850@e1g2000hsg.googlegroups.com>
Message-ID: <565hscF27b88iU1@mid.uni-berlin.de>

gamename schrieb:
> Hi,
> 
> I'm a recent convert from TCL.  One of the more powerful aspects of
> TCL is the ability to rename a function at will (generally for testing
> purposes).
> 
> Example from the tcl doc:
> 
> rename ::source ::theRealSource
> set sourceCount 0
> proc ::source args {
>     global sourceCount
>     puts "called source for the [incr sourceCount]'th time"
>     uplevel 1 ::theRealSource $args
> }
> 
> So, is such a thing possible in Python?


def foo():
     print 'foo'

bar = foo

bar()

Is it that what you mean?

Diez


From deets at nospam.web.de  Wed Mar 14 12:48:02 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Wed, 14 Mar 2007 17:48:02 +0100
Subject: (beginners) howto ascribe _all_ fields of parent class to child
	class?
In-Reply-To: <1173889732.055694.264510@p15g2000hsd.googlegroups.com>
References: <1173889732.055694.264510@p15g2000hsd.googlegroups.com>
Message-ID: <55qna6F26ckfoU1@mid.uni-berlin.de>

dmitrey schrieb:
> Hi all,
> I'm rewriting some code from other language  to Python; can anyone
> explain me which way is the simpliest:
> I have
> class C1():
>     def __init__(self):
>          self.a = 5
> 
> class C2(C1):
>     def __init__(self):
>          self.b = 8
> 
> c = C2()
> print c.b#prints 8
> print c.a#prints error, because field a is absent
> 
> so how can I wrote the code that I'll got all class C1 fields (not
> only funcs)

You need to call the super classes __init__-method. There are several 
ways to do so, in your case

class C2(C1):
     def __init__(self):
         C1.__init__(self)
         self.b = 8

should do the trick.

DIEZ


From shaileshk at gmail.com  Wed Mar 28 08:49:06 2007
From: shaileshk at gmail.com (shailesh)
Date: 28 Mar 2007 05:49:06 -0700
Subject: how to check whether a drive is a network drive or drive from
	attached hard-disk
Message-ID: <1175086146.462161.320980@p15g2000hsd.googlegroups.com>

Hi,

Few very simple questions.

Is there a way to detect whether a drive is a mapped network drive or
not in Windows?

Also, how can I get a list of drive letters currently in use in the
system?

Your help is highly appreciated. Thanks in advance.

With regards,
-Shailesh



From stefan.behnel-n05pAM at web.de  Wed Mar 14 11:15:47 2007
From: stefan.behnel-n05pAM at web.de (Stefan Behnel)
Date: Wed, 14 Mar 2007 16:15:47 +0100
Subject: most complete xml package for Python?
In-Reply-To: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
References: <1173789812.657930.261350@h3g2000cwc.googlegroups.com>
Message-ID: <45F811A3.1050208@web.de>

metaperl wrote:
> Without even checking them all out, I'm thinking the Amara XML Toolkit
> must be the most feature-packed.

Please check out lxml before you post FUD like this.

http://codespeak.net/lxml/

Regards,
Stefan


From http  Thu Mar 22 14:17:02 2007
From: http (Paul Rubin)
Date: 22 Mar 2007 10:17:02 -0800
Subject: challenge ?
References: <1174581702.968531.82550@y66g2000hsf.googlegroups.com>
Message-ID: <7xlkhpywgx.fsf@ruckus.brouhaha.com>

"alain" <alainpoint at yahoo.fr> writes:
> def annotate_with_rank(my_dict):
> 	....
> 	return my_annotated_dict
> 
> In other words, any value a_value would become a 2-tuple
> (a_value,rank_of_a_value)
> 
> I seek an elegant solution.

Untested:

   def annotate_with_rank(my_dict):
        s = sorted( ((v,i),k) for i,(k,v) in enumerate(my_dict.iteritems()))
        return dict((k,v) for (v,k) in s)


From lew at nospam.lewscanon.com  Fri Mar 23 08:57:57 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Fri, 23 Mar 2007 08:57:57 -0400
Subject: On Java's Interface (the meaning of interface in computer
	programing)
In-Reply-To: <m2slbxbg57.fsf@local.wv-www.com>
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnfxDTKdi5J_bnZ2dnUVZ_uzinZ2d@comcast.com>
	<m2slbxbg57.fsf@local.wv-www.com>
Message-ID: <Na-dnQjjNblIU57bnZ2dnUVZ_vKunZ2d@comcast.com>

Sherm Pendley wrote:
> Lew <lew at nospam.lewscanon.com> writes:
> 
>> Jim Burton wrote:
>>> Or you could stop feeding the trolls.
>> Does not apply. The OP was not being trollish
> 
> You obviously don't know Xah. He's been doing this for years, cross-
> posting to various language groups trying to start an argument between
> them. He even brags about being a troll on his web site.

OK - that last is telling. I believe in the possibility of redemption: if a 
troll posts non-trollishly then I am willing to give them the benefit of the 
doubt.

But if Xah were being trollish, why didn't they jump on my response and call 
me names?

I still think that analysis of the original post is a useful exercise to learn 
Java. It's one thing to know what's right - it's another to know what's wrong 
and exactly why. The more subtle Xah or other minions of Satan get in their 
presentations, the more interesting the forensic exercise to dig out the truth.

Perhaps I am just trying to make a silk purse out of a sow's ear.

-- Lew


From kushal.kumaran at gmail.com  Sat Mar 24 01:16:14 2007
From: kushal.kumaran at gmail.com (Kushal Kumaran)
Date: 23 Mar 2007 22:16:14 -0700
Subject: How can I tell when the threads that I spawn are done in python
In-Reply-To: <1174711538.875033.215320@d57g2000hsg.googlegroups.com>
References: <1174711538.875033.215320@d57g2000hsg.googlegroups.com>
Message-ID: <1174713374.418345.126200@b75g2000hsg.googlegroups.com>

On Mar 24, 9:45 am, "ogerchi... at gmail.com" <ogerchi... at gmail.com>
wrote:
> Hi,
>
> In my python scripts, I create thread likes this:
>    // for example threadCount is 10
>      for j in range(int(threadCount)):
>                 t = MyThread()
>                 t.start()
>
>      // wait all the threads are done
>     doSomething()
>
> My question is how can i tell when all the threads are done before I
> call doSomething()?
>

If you are using the threading module for your threads, Thread objects
have a join method that you could call.  Stash away all your Thread
objects in a list and call join() on all of them.
--
Kushal Kumaran



From hitesh287 at gmail.com  Mon Mar 12 14:37:41 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 12 Mar 2007 11:37:41 -0700
Subject: glob.glob output
In-Reply-To: <1173723135.378607.44160@h3g2000cwc.googlegroups.com>
References: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
	<1173723135.378607.44160@h3g2000cwc.googlegroups.com>
Message-ID: <1173724660.978769.40630@q40g2000cwq.googlegroups.com>

On Mar 12, 2:12 pm, "Hitesh" <hitesh... at gmail.com> wrote:
> On Mar 12, 1:58 pm, "Hitesh" <hitesh... at gmail.com> wrote:
>
>
>
>
>
> > import string
> > import os
>
> > f = open ("c:\\servername.txt", 'r')
> > linelist = f.read()
>
> > lineLog = string.split(linelist, '\n')
> > lineLog = lineLog [:-1]
> > #print lineLog
> > for l in lineLog:
> >     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
> >     glob.glob(path1)
>
> > When I run above from command line python, It prints the output of
> > glob.glob but when I run it as a script, it does not print
> > anything.... I know that there are files like xtRec* inside those
> > folders.. and glob.glob does spits the path if run from python command
> > line.
>
> > I tried something like this but did not work:
> > for l in lineLog:
> >     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
> >     xtRec = glob.glob(path1)
> >     print xtRec
>
> > No results...
>
> > xtRec = []
> > for l in lineLog:
> >     path1 = "\\\\" + l + "\\server*\\*\\xtRec*"
> >     xtrec = glob.glob(path1)
> > print xtRec
>
> >  No luck here either.
>
> > Seems like I am doing here something reallt silly mistake..
>
> > Thank you,
> > hj
>
> I am using pythonWin and command line means Interactive Shell.- Hide quoted text -
>
> - Show quoted text -

all right seems like I got it.. it's the looping part. I need to
append the list.

hj



From kyosohma at gmail.com  Fri Mar 23 15:48:09 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 12:48:09 -0700
Subject: exit to interpreter?
In-Reply-To: <mailman.5523.1174674034.32031.python-list@python.org>
References: <mailman.5522.1174672336.32031.python-list@python.org>
	<1174673079.976162.307960@n76g2000hsh.googlegroups.com>
	<mailman.5523.1174674034.32031.python-list@python.org>
Message-ID: <1174679289.267429.18000@l77g2000hsb.googlegroups.com>

On Mar 23, 1:20 pm, belinda thom <b... at cs.hmc.edu> wrote:
> On Mar 23, 2007, at 11:04 AM, kyoso... at gmail.com wrote:
>
>
>
> > On Mar 23, 12:52 pm, belinda thom <b... at cs.hmc.edu> wrote:
> >> Hi,
>
> >> I'm writing a function that polls the user for keyboard input,
> >> looping until it has determined that the user has entered a valid
> >> string of characters, in which case it returns that string so it can
> >> be processed up the call stack. My problem is this. I'd also like it
> >> to handle a special string (e.g. 'quit'), in which case control
> >> should return to the Python command line as opposed to returning the
> >> string up the call stack.
>
> >> sys.exit seemed like a good choice, but it exits the python
> >> interpreter.
>
> >> I could use an exception for this purpose, but was wondering if
> >> there's a better way?
>
> >> --b
>
> > If you're using a function, wouldn't using the keyword "return" work?
>
> > Mike
>
> No, because that just returns to the caller, which is not the Python
> interpreter.

Sorry...I didn't realize you were calling from another function or
functions. Duh. I agree with the other writer. Use a custom exception.



From vinjvinj at gmail.com  Tue Mar 13 22:57:46 2007
From: vinjvinj at gmail.com (vj)
Date: 13 Mar 2007 19:57:46 -0700
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <mailman.5051.1173838059.32031.python-list@python.org>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>
	<mailman.5051.1173838059.32031.python-list@python.org>
Message-ID: <1173841066.530575.73050@n59g2000hsh.googlegroups.com>

> It is just a redirection to the numpy-discuss... at scipy.org list. If you just
> tried in the past hour or so, I've discovered that our DNS appears to be down
> right now.

I tried registering the twice the last couple of days and never got an
email back.

> No, that's not what insert() does. See the docstring:

Then this behavior is different from the scipy_base.insert

> In [7]: a[mask] = 100

What I needed was

a[mask] = array_of_values

I just tried it and  it works.

Thanks,

VJ



From http  Sat Mar  3 18:36:14 2007
From: http (Paul Rubin)
Date: 03 Mar 2007 15:36:14 -0800
Subject: pop method question
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
	<CqnGh.6368$re4.4381@newssvr12.news.prodigy.net>
Message-ID: <7xy7mdsxw1.fsf@ruckus.brouhaha.com>

James Stroud <jstroud at mbi.ucla.edu> writes:
> for akey in dict1:
>    if some_condition(akey):
>      dict2[akey] = dict2.pop(akey)
> 
> Which necessitates a key is a little cleaner than your latter example.

Yeah, I also think removing keys from a dict while iterating over it
(like in Steven's examples) looks a bit dangerous dangerous.

Assuming you meant "dict1.pop" instead ot dict2.pop above, your
example might be written

    dict2 = dict((k, dict1.pop(k)) for k in dict1 if some_condition(k))

avoiding some namespace pollution etc.


From grante at visi.com  Fri Mar  9 10:47:37 2007
From: grante at visi.com (Grant Edwards)
Date: Fri, 09 Mar 2007 15:47:37 -0000
Subject: opinion needed
References: <1173454035.316124.307620@h3g2000cwc.googlegroups.com>
Message-ID: <12v30cp3jqo3kfb@corp.supernews.com>

On 2007-03-09, azrael <jura.grozni at gmail.com> wrote:

> I just started using Prolog yesterday and i have my doubts about it,
> but it seems to me something like object oriented.

Not in my experience, but I haven't used Prolog for 10 years.

> so i wanted to ask you how usefull prolog is.

It's brilliant for doing predicate logic.  It sort of sucks for
most other things.

> Sure this is no prolog newsgroup so my question is: because it
> seems object oriented, how important is it by understanding
> python and improving my python skills.

What?

> because i just started it, i may bee totaly wrong or i
> missunderstood.

-- 
Grant Edwards                   grante             Yow!  Were these parsnips
                                  at               CORRECTLY MARINATED in
                               visi.com            TACO SAUCE?


From supervau at gmail.com  Sat Mar 10 16:23:18 2007
From: supervau at gmail.com (Frank)
Date: 10 Mar 2007 13:23:18 -0800
Subject: Formatted Input
In-Reply-To: <1173554922.454532.178280@n33g2000cwc.googlegroups.com>
References: <1173554922.454532.178280@n33g2000cwc.googlegroups.com>
Message-ID: <1173561798.690376.88460@h3g2000cwc.googlegroups.com>

On Mar 10, 11:28 am, "Deep" <deepblue... at gmail.com> wrote:
> Hi all,
> I am a newbie to python
> I have an input of form
> <one number> space <another number>
> ie.
> 4 3
> how can i assign this to my variables??

Hi,

you could use:

aux = f.readline()  # read a line from your input file
new_aux = string.split(aux, ' ') # you can use also other separaters,
e.g., \t, or '  more than one space', or...
L = len(new_aux) # number of values
Remark:
the elements in new_aux are string, that means you have to convert
them to numbers by,, e.g., int(row[i]).

Hope this helps,

Frank




From aleax at mac.com  Sun Mar 11 14:26:01 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 11:26:01 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
Message-ID: <1hut4yc.o9f1kta318hnN%aleax@mac.com>

Mark Dickinson <dickinsm at gmail.com> wrote:

> On Mar 11, 1:26 pm, a... at mac.com (Alex Martelli) wrote:
> > [Long analysis of probable cause of the problem]
> 
> Thank you for this.  I was suspecting something along these lines,
> but I don't yet know my way around the source well enough to figure
> out where the problem was coming from.

The parser/compiler/etc are unfortunately some of the hardest parts of
the sources -- I'm not all that familiar with that part myself, which is
why it took me quite some digging.


> > In the meantime, I hope that some available workarounds for the bug are
> > clear from this discussion: avoid using multiple constants in a single
> > compilation unit where one is 0.0 and another is -0.0, or, if you really
> > can't avoid that, perhaps use compiler.compile to explicitly build the
> > bytecode you need.
> 
> Yup: the workaround seems to be as simple as replacing all occurrences
> of -0.0 with -(0.0).  I'm embarrassed that I didn't figure this out
> sooner.
> 
> >>> x, y = -(0.0), 0.0
> >>> x, y
> (-0.0, 0.0)

Glad it works for you, but it's the kind of workaround that could break
with any minor tweak/optimization to the compiler... very fragile:-(.

I think i found the cause of the bug, BTW.  The collection of constants
in a code object is built in Python/compile.c and it's built as a
dictionary, field u_consts in struct compiler_unit.  The "visitor" for
an expression that is a number is (in a case statement)

case Num_kind:
                ADDOP_O(c, LOAD_CONST, e->v.Num.n, consts);
                break;

(line 2947 of compile.c in Python's current sources from svn). ADDOP_O
just calls compiler_addop_o, which in turn does compiler_add_o before
adding the opcode (LOAD_CONST)

compiler_add_o (at lines 903-933) is used for all of the temporary
dictionaries in compiler_unit; a Python equivalent, basically, would be:

def eqv_cao(somedict, someobj):
    # make sure types aren't coerced, e.g. int and long
    t = someobj, type(someobj)
    if t in somedict:
        return somedict[t]
    somedict[t] = index = len(somedict)
    return index

a simple and fast way to provide a distinct numeric index (0 and up) to
each of a bunch of (hashable) objects.

Alas, here is the problem...: 0.0 and -0.0 are NOT separate as dict
keys!  They are == to each other.  So are 0, 0L, and 0+j0, but the
compiler smartly distinguishes these cases by using (obj, type) as the
key (the *types* are distinguished, even though the *values*) are; this
doesn't help with 0.0 and -0.0 since both have type float.

So, the first occurrence of either 0.0 or -0.0 in the compilation unit
ends up in the table of constants, and every other occurrence of either
value later in the unit is mapped to that one constant value:-(

This is not trivial to fix cleanly...:-(.  compiler_add_o would have to
test "is the object I'm storing -0.0" (I don't even know how to do that
in portable C...) and then do some kludge -- e.g. use as the key into
the dict (-0.0, 0) instead of (-0.0, float) for this one special case.
(I think the table of constants would still be emitted OK, since the
type part of the key is elided anyway in that table as placed in the
bytecode).  Or maybe we should give up ever storing -0.0 in the tables
of constant and ALWAYS have "0.0, unary-minus" wherever it appears (that
would presumably require working on the AST-to-bytecode visitors that
currently work ever-so-slightly-differently for this specific
troublespot in the C-coded version vs the Python-coded one...).

If you know the proper way to test for -0.0 in portable C code (or some
feature macro to use in a #if to protect nonportable code) I could try
proposing the first of these two solutions as a patch (I'm not going to
keep delving into that AST and visitors much longer...:-), but I suspect
it would be rejected as "too tricky [and minisculely slowing down every
compilation] for something that's too much of special case [and Python
does not undertake to support in general anyway]".  Still, we can't be
sure unless we try (and maybe somebody can think of a cleaner
workaround...).


Alex


From rbuck at xmission.com  Thu Mar  1 00:22:17 2007
From: rbuck at xmission.com (Ray Buck)
Date: Wed, 28 Feb 2007 22:22:17 -0700
Subject: Python installation problem (sorry if this is a dup)
Message-ID: <7.0.1.0.2.20070228222123.03635948@xmission.com>

I've been trying to install Mailman, which requires a newer version 
of the Python language compiler (p-code generator?) than the one I 
currently have on my linux webserver/gateway box.

It's running a ClarkConnect 2.01 package based on Red Hat 7.2 linux.

I downloaded the zipped tarball (Python-2.4.4.tgz), ran gunzip, then 
un-tarred it in /usr/local.  Then (logged in as root) from 
/usr/local/Python-2.4.4 I ran the configure script which appeared to 
run properly.  At least there were no error messages that I 
saw.  Then I attempted to run "make install" and ended up with an 
error "make *** Error 1".  It was right at the "libinstall" section 
of the make, so I did some googling and came up with the following command:
[root at gateway Python-2.4.4]# make libinstall inclinstall

After thrashing for about 5 minutes, I got basically the same message:
Compiling /usr/local/lib/python2.4/zipfile.py ...
make: *** [libinstall] Error 1

I dunno if this is relevant, but I have Python 2.2.2 in the 
/usr/Python-2.2.2 directory.  Do I have to blow this away in order to 
install the newer distro?  Or do I need to install the new one in/usr 
instead of /usr/local?

Although I'm a retired programmer (mainframes), I'm still learning 
this linux stuff.  I guess that makes me a noob...I hope you'll take 
that into consideration.

Thanks,

Ray



From vorticitywolfe at gmail.com  Sun Mar 18 19:04:47 2007
From: vorticitywolfe at gmail.com (vorticitywolfe at gmail.com)
Date: 18 Mar 2007 16:04:47 -0700
Subject: where function
In-Reply-To: <1174258135.009452.192960@e1g2000hsg.googlegroups.com>
References: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>
	<1174258135.009452.192960@e1g2000hsg.googlegroups.com>
Message-ID: <1174259087.255048.286170@l77g2000hsb.googlegroups.com>

On Mar 18, 10:48 pm, bearophileH... at lycos.com wrote:
> vorticitywo:
>
> > Is there a function in Python analogous to the "where" function in
> > IDL?
>
> Python gives very elastic syntax, you can simply do:
>
> data = [0,1,2,3,4,2,8,9]
> print [pos for pos, el in enumerate(data) if el==2]
>
> Bye,
> bearophile

Thank you both, a little more cumbersome than I expected, but it does
the job! Thanks!



From jstroud at mbi.ucla.edu  Mon Mar 26 06:59:24 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Mon, 26 Mar 2007 10:59:24 GMT
Subject: with timeout(...):
In-Reply-To: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
Message-ID: <gINNh.70$5e2.44@newssvr11.news.prodigy.net>

Nick Craig-Wood wrote:
> Did anyone write a contextmanager implementing a timeout for
> python2.5?
> 
> I'd love to be able to write something like
> 
>     with timeout(5.0) as exceeded:
>         some_long_running_stuff()
>     if exceeded:
>         print "Oops - took too long!"
> 
> And have it work reliably and in a cross platform way!
> 
> From my experiments with timeouts I suspect it won't be possible to
> implement it perfectly in python 2.5 - maybe we could add some extra
> core infrastructure to Python 3k to make it possible?
> 

I'm guessing your question is far over my head, but if I understand it, 
I'll take a stab:

First, did you want the timeout to kill the long running stuff?

I'm not sure if its exactly what you are looking for, but I wrote a 
timer class that does something like you describe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/464959

Probably you can do whatever you want upon timeout by passing the 
appropriate function as the "expire" argument.

This works like a screen saver, etc.

James


From michael at jedimindworks.com  Fri Mar 30 18:42:10 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Fri, 30 Mar 2007 17:42:10 -0500
Subject: Inserting '-' character in front of all numbers in a string
In-Reply-To: <1175290917.509860.224250@o5g2000hsb.googlegroups.com>
References: <1175269107.769945.241500@r56g2000hsd.googlegroups.com>
	<mailman.5793.1175281775.32031.python-list@python.org>
	<1175290917.509860.224250@o5g2000hsb.googlegroups.com>
Message-ID: <0D9C1096-834C-4904-8434-96943A92A01D@jedimindworks.com>


On Mar 30, 2007, at 4:41 PM, Paul McGuire wrote:

> On Mar 30, 2:09 pm, Michael Bentley <mich... at jedimindworks.com> wrote:
>> On Mar 30, 2007, at 10:38 AM, kevinliu23 wrote:
>>
>>
>>
>>
>>
>>> I want to be able to insert a '-' character in front of all numeric
>>> values in a string. I want to insert the '-' character to use in
>>> conjunction with the getopt.getopt() function.
>>
>>> Rigt now, I'm implementing a menu system where users will be able to
>>> select a set of options like "2a 3ab" which corresponds to menu
>>> choices. However, with getopt.getopt(), it'll only return what I  
>>> want
>>> if I input -2a -3ab as my string. I don't want the user have to  
>>> insert
>>> a '-' character in front of all their choices, so I was thinking of
>>> accepting the string input first, then adding in the '-' character
>>> myself.
>>
>>> So my qusetion is, how do I change:
>>
>>> "2a 3ab" into "-2a -3ab".
>>
>> Will the first character always be a digit?
>>
>> for i in yourstring.split():
>>         if i[0].isdigit():
>>                 yourstring = yourstring.replace(i, '-%s' % (i,))
>>
>> Or are these hex numbers?- Hide quoted text -
>>
>> - Show quoted text -
>
> Your replace strategy is risky.  If:
>
> yourstring = "1ab 2bc 3de 11ab"
>
> it will convert to
>
> -1ab -2bc -3de 1-1ab

True enough!  Good catch!  How's this?

for i in yourstring.split():
	if i[0].isdigit():
		yourstring = yourstring.replace(i, '-%s' % (i,), 1)




From pibizza at gmail.com  Wed Mar 14 04:39:13 2007
From: pibizza at gmail.com (PaoloB)
Date: 14 Mar 2007 01:39:13 -0700
Subject: Mocking OpenOffice in python?
Message-ID: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>

Hi everyone,

during our development, we need to write some unit tests that interact
with OpenOffice through pyUno.

Is there anyone who has got any experience on it? As OpenOffice is
quite a large beast, and interaction is rather complex, I would like
to know if there is someone who is willing to share experience (and,
possibly, code).

Ciao

PaoloB



From mark.iinet.news at mailinator.com  Fri Mar 23 08:22:44 2007
From: mark.iinet.news at mailinator.com (mark)
Date: 23 Mar 2007 12:22:44 GMT
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
	<pan.2007.03.23.01.01.15@mailinator.com>
	<pan.2007.03.23.03.03.11.268638@REMOVEME.cybersource.com.au>
	<pan.2007.03.23.07.30.56@mailinator.com>
	<pan.2007.03.23.11.24.01.646010@REMOVE.THIS.cybersource.com.au>
Message-ID: <pan.2007.03.23.12.22.41@mailinator.com>

On Fri, 23 Mar 2007 22:24:07 +1100, Steven D'Aprano wrote:
>     if not os.path.exists(compiledname) or \ os.stat(compiledname)[MT] <
>     os.stat(scriptname)[MT]:
>         # compiled file doesn't exist, or is too old

Surely the validity check done by Python is more sophisticated than
this? Doesn't the binary file have to be compiled under the same python
version etc?

> Now don't forget to test whether launching the subshell takes longer
> than the 20ms you might save. All that effort, and wouldn't it be ironic
> if it was actually *slower* than executing the script from scratch each
> time...

But Python proper is executing all the above anyhow isn't it? So the 20
msecs advantage I measured already includes this logic.

Anyhow, I give up. Compilation, it seems, only applies to python
modules. Compilation is not appropriate for Python scripts. Should be
in the FAQ.


From ask at me  Wed Mar 14 22:23:26 2007
From: ask at me (alf)
Date: Wed, 14 Mar 2007 20:23:26 -0600
Subject: distributing python software in jar like fashion
Message-ID: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>

Hi,

I have a small app which consist of a few .py files. Is there any way to 
distribute it in jar like fashion as a single file I can just run python 
on. I obviously look for platform independent solution.

Thx in advance, A.


From tjreedy at udel.edu  Wed Mar 21 14:36:49 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 Mar 2007 14:36:49 -0400
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	couldbe PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <etru01$9ko$1@sea.gmane.org>

You asked two questions; the first others have asked also.

Mathematicians sometimes use brackets to indicate function application and 
sometimes just juxtaposition.  When they do the latter and when there are 
things other than functions (to exclude pure lambda calculus), then there 
are usually (always?) typographic conventions to differentiate between 
function names and value names.

A common convention is value names one letter, function names multiple 
letters;  as in 'exp cos ln x'.  Note that the functions all take one arg. 
Another is that functions get capital letters, as in 'Fx'.

Without such differentiation, and without declaritive typing of *names*, 
the reader cannot parse a sequence of expressions into function calls until 
names are resolved into objects.  And if calls can return either callable 
or non-callable objects, as in Python, but rare in mathematics, then one 
cannot parse until calls are actually made (or at least attempted, and an 
exception raised).  I mention 'attempted' because in Python there is no 
certain way to be sure an object is callable except by calling it.  It is 
much more flexible and extensible than most math systems.

Other have alluded to this problem:  if you have 'f' mean what 'f()' now 
means, then you need another way to mean what 'f' now means, such as '`f' 
(quote f).  But again, Python names are not typed.  And how would you then 
indicate 'f()()' instead of 'f()'.  The math notations without brackets 
generally don't have to deal with callables returning callables.

I don't like typing ()s much either, but they seem necessary for Python, 
and become easier with practice.

As for ,s:  they are rather easy to type.  More importantly, they turn 
certain extraneous spaces into syntax errors instead of runtime bugs that 
might pass silently and give bad answers.  For instance, 'x_y' mistyped as 
'x y'.  Most importantly, making space syntactically significant either 
within call brackets or everywhere would require prohibiting currently 
optional spaces.  For instance, 'daffodils + crocuses' would have to be 
written 'daffodils+crocuses', like it or not.

Terry Jan Reedy





From hg at nospam.org  Wed Mar 28 06:18:49 2007
From: hg at nospam.org (hg)
Date: Wed, 28 Mar 2007 12:18:49 +0200
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
Message-ID: <9rxOh.107891$ia7.93435@newsfe14.lga>

hg wrote:

> Hi,
> 
> I'v been facing some very strange errors lately:
> 
> one example:
> 
> def __init__(self):
> ....
>         import my_info
>         some_text = my_info.T_SOME_TEXT
>                                       ^ syntax error
> 
> 
> I manage to get rid of that one by moving the import on top of my file.
> 
> Note: Python 2.4.1 under Windows
> 
> 
> Any clue ?
> 
> Thanks,
> 
> hg


PS:

and I also get some even weirder studd such as an error on line 374 when I
add a print on line 65

I'm using pydev + pydev ext

hg



From tal.no.no.spam at gmail.com  Mon Mar 26 18:27:03 2007
From: tal.no.no.spam at gmail.com (Tal Einat)
Date: 26 Mar 2007 15:27:03 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1174948023.448520.186160@y66g2000hsf.googlegroups.com>

On Mar 26, 3:20 pm, "Noma... at gmail.com" <Noma... at gmail.com> wrote:
> OK...
> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but
> then Python is a tad slower than Fortran because of its a high level
> language nature, so what are the advantages of using Python for
> creating number crunching apps over Fortran??
> Thanks
> Chris

Personally, my #1 reason for favoring Python is the interpreter. When
developing code which implements complex algorithms/calculations, I
always find I want to play around with things during development.
Using Python's interpreter this is a real joy!

Now, I don't mean tweaking the almost-finalized implementation - I
mean tweaking bits and pieces of code during all stages of
development. For instance: Optimizing an algorithm's parameters by
trying different combinations out under different circumstances. Or
checking the potential gains from pre-processing something. Or writing
a specialized version of a certain function and testing it for
correctness and performance. Etc, etc.

As for my background - I have developed "number-crunching" software
with C, C++ and Python over the past 5 years, and have recently
learned Fortran as well. Python has consistently failed to disappoint
me :)

- Tal Einat
reduce(lambda m,x:[m[i]+s[-1] for i,s in enumerate(sorted(m))],
       [[chr(154-ord(c)) for c in '.&-&,l.Z95193+179-']]*18)[3]



From soyouthinkimgonnalikethis at hotmail.com  Sat Mar 31 07:40:39 2007
From: soyouthinkimgonnalikethis at hotmail.com (Eric Price)
Date: Sat, 31 Mar 2007 07:40:39 -0400
Subject: os.system questions
Message-ID: <BAY114-F8E0A631C40E1C39EE6EF8A0620@phx.gbl>

Hi;
I have a couple bugs to work out in the below script; namely, I don't know 
how to capture the result of an os.system command, nor am I convinced that 
the call to os.system actually results in the execution of the command. Here 
is the script:

#!/usr/local/bin/python
import re, os

def freshReboot():
	up = os.system("uptime")
	if re.search('day|hour', up):
		pass
	else:
		first = up
		tup = re.split('min', up)
		first = tup[0]
		n = len(first)
		char = first[n-3:n-2]
		if re.match(' ', char):
			os.system("/usr/local/etc/rc.d/zz_mysql_starter_script.sh")


Here are my problems:

up = os.system("uptime")
How do I assign the output of "uptime" to the variable "up"?

os.system("/usr/local/etc/rc.d/zz_mysql_starter_script.sh")
When I substitute a test variable for "up", I don't get this script to 
actually run. Everything else is tested and works. Why won't this script 
run?

TIA,
Eric

_________________________________________________________________
It?s tax season, make sure to follow these few simple tips 
http://articles.moneycentral.msn.com/Taxes/PreparationTips/PreparationTips.aspx?icid=HMMartagline



From bdesth.quelquechose at free.quelquepart.fr  Tue Mar 27 16:50:50 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 27 Mar 2007 22:50:50 +0200
Subject: Extending a class on runtime
In-Reply-To: <1175022354.782957.34130@o5g2000hsb.googlegroups.com>
References: <1175022354.782957.34130@o5g2000hsb.googlegroups.com>
Message-ID: <46097afd$0$7525$426a74cc@news.free.fr>

rdaunoravicius at gmail.com a ?crit :
> Hi,
> 
> Let's say you have a bunch of instatiated objects of the same class on
> your hands and you want to had some functionality to them.

Then I'd just do it.

> I'm facing this situation while working with PyGTK and libglade to
> create a GUI. Libglade creates a whole object tree representing the
> GUI out of an XML file, and a bunch of GtkComboBox objects are
> instantiated. I don't like the way GtkComboBox objects works, so I'd
> like them to have some extra methods. Inheriting and extending
> GtkComboBox is pointless because I'm not the one instantiating the
> class. I only came up with three possibilities:
> 
>     A) Adding my methods to the objects in a for-loop
> 
>     B) Adding my methods to the GtkComboBox class (I tried this and it
> seems to work)

I don't have much experience with PyGTK, but unless GtkComboBox is a 
very special class object, it should JustWork(tm).

>     C) Create a GtkComboBoxExtended class inheriting from GtkComboBox
> and change the instances' class in a for-loop.

That's another possible solution, but it requires more work.

> I'm kind of inclined to C. B sounds dangerous

Why ? Eventually confusing if not well documented, but mostly harmless 
IMHO. Python is dynamic by nature, and there's no reason to not take 
advantage of this fact.

> and A is plain ugly.

It's also the more complicated and less efficient solution IMHO (unless 
you want different implementations of the same method on a per-instance 
basis...).

> I'm very new to this and I'm sure there is a well-established pythonic
> way to solve this problem, so I'm appealing for  your vast collective
> wisdom to point me in the path of righteousness.

As far as I'm concerned, and if it's just a matter of adding a couple of 
methods, I'd go for B, which is the SimplestThingToDo(tm).

Now if it's a big complicated project with a rather unstable team, C is 
perhaps a bit more explicit since it makes obvious that this not a 
pristine GtkComboBox no more. But even then, it's always possible to 
monkeypatch a class in a more or less documented way (explict mentions 
of the patch in added/replaced/extended methods and in __repr__()).

My 2 cents...


From kyosohma at gmail.com  Thu Mar 29 08:59:01 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 05:59:01 -0700
Subject: Finding User Profile path
In-Reply-To: <mailman.5745.1175154506.32031.python-list@python.org>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>
	<mailman.5745.1175154506.32031.python-list@python.org>
Message-ID: <1175173141.277735.192020@o5g2000hsb.googlegroups.com>

On Mar 29, 2:50 am, Tim Golden <m... at timgolden.me.uk> wrote:
> kyoso... at gmail.com wrote:
> > Hi,
>
> > I am trying to query our domain to get a list of our users profile
> > locations. I thought I might be able to use WMI, but I can't get it to
> > work.
>
> Can you be a bit more specific: did WMI itself not work? Or the
> Python WMI module? What were the problems? (All this, obviously,
> if you're interested in pursuing that path).
>
> I am using a Windows XP Pro workstation and Python 2.4 on a
>
> > mixed environment of Debian Linux (with Samba) and Windows servers. We
> > are in the process of moving the user profiles from an NT box to a
> > Debian box, but due to the many different servers in the organization,
> > it is a pain to keep track of which have been moved and which haven't.
>
> Have a look at the win32net module from the pywin32
> extensions, specifically functions like NetUserGetInfo
> and NetUserSetInfo. You have to pick your USER_INFO a
> bit (look around the MSDN pages) but I think you can do
> what you're after.
>
> TJG

Thanks for the reply. One of my co-workers thought I could do
something like this:

c = wmi.WMI()
for i in c.Win32_UserAccount(Name=user):
    # Get user paths somehow.

I messed around with that, but I think he was mistaken. It has lots of
good info, but not what I need.

I apologize for not being specific. I will look at those win32net
functions.

Mike



From slarti at beeblebrox.net  Thu Mar 22 11:40:38 2007
From: slarti at beeblebrox.net (Slartibartfast)
Date: Thu, 22 Mar 2007 10:40:38 -0500
Subject: On Java's Interface (the meaning of interface in computer
	programing)
References: <1174454636.100363.196640@l77g2000hsb.googlegroups.com>
	<BMmdneR6mfcvt5zbnZ2dnUVZ_rCsnZ2d@comcast.com>
	<1174484076.994815.89820@y66g2000hsf.googlegroups.com>
	<4fWdnTVj-Y3-HpzbnZ2dnUVZ_v-tnZ2d@comcast.com>
	<1174557840.338374.25990@d57g2000hsg.googlegroups.com>
	<57idnf5DTKfj55_bnZ2dnUVZ_uzinZ2d@comcast.com>
	<1174575484.699736.260130@n59g2000hsh.googlegroups.com>
Message-ID: <ArxMh.10950$Ng1.3575@newsfe19.lga>


"jim burton" <jimburton1 at gmail.com> wrote in message 
news:1174575484.699736.260130 at n59g2000hsh.googlegroups.com...
> On 22 Mar, 12:45, Lew <l... at nospam.lewscanon.com> wrote:
>> Jim Burton wrote:
>> > Or you could stop feeding the trolls.
>>
>> People need to stop saying that. The original post was a detailed if 
>> incorrect
>> exposition of Java information. How in the world do you rate that 
>> trollish?
>>
>> I have absolutely no reason to rate the OP as a troll or their post as 
>> trollish.
>>
>> -- Lew
>
> Oh, in that case welcome to usenet. Take a while to settle in. There's
> this guy here called Xah and he is a troll.
>

Why oh why does anyone even bother to respond to Xah Lee? See the true Xah 
at:

http://node60091.multiply.com/photos/album/1

WARNING: Nudity!!! Not family- or work-friendly!!!




From fumanchu at amor.org  Wed Mar 14 23:25:23 2007
From: fumanchu at amor.org (fumanchu)
Date: 14 Mar 2007 20:25:23 -0700
Subject: Too slow to read an entire table from Microsoft Access
In-Reply-To: <mailman.5120.1173926099.32031.python-list@python.org>
References: <mailman.5120.1173926099.32031.python-list@python.org>
Message-ID: <1173929123.628318.150390@b75g2000hsg.googlegroups.com>

On Mar 14, 7:34 pm, lialie <lia... at gmail.com> wrote:
> I read a table with 4500 rows and 12 columns using win32com.client.
> Reading and updating records are OK, but cost too much time.Especially
> making a dict as line(***).
> All follows done may take nearly 90s!
> Is there any good idea? Thanks.

Yeah:

1. Don't use MoveFirst/MoveNext to read. Use GetRows. It's about 60%
faster (on average) in my experience:
http://projects.amor.org/dejavu/browser/trunk/storage/storeado.py?rev=335#l593

2. Unwind as much of each win32com call as you can, and try to call
InvokeTypes directly. That'll save you another big chunk. See
http://projects.amor.org/dejavu/browser/branches/1.5/storage/storeado.py#l700


Robert Brewer
System Architect
Amor Ministries
fumanchu at amor.org



From AWasilenko at gmail.com  Sun Mar 18 18:15:16 2007
From: AWasilenko at gmail.com (AWasilenko at gmail.com)
Date: 18 Mar 2007 15:15:16 -0700
Subject: Trying to print from inside a method
Message-ID: <1174256116.872955.180040@l77g2000hsb.googlegroups.com>

I'm still in the process of learning python via a handful of books I
bought.  One book I am reading just introduced Base Class Methods.  I
found that I needed more understanding on this concept and wrote a
short test program using the Author's code as a vague reference.  My
question now really isn't Base Class related, but my question stems
from my test code so I will just post it as is.

##Test of Super() stuff
class First(object):

    def __init__(self, wamba, nextel):
        self.wamba = wamba
        self.nextel = nextel
        message1 = "This is message 1"
        print  message1

    def message22(self):
        message2 = "This is message 2"
        print message2

class Second(First):

    def __init__(self, samba, fextel, sony):
        super(Second, self).__init__(samba, fextel)
        self.sony = sony
        print "This is message 1a"


test1 = First(wamba = "Mermaid Man", nextel = "Cell Phone")
test2 = Second(samba = "Barnical Boy", fextel = "Hooopla", sony =
"Nooo Good!")

My question came up when I wanted to print message1 directly and
couldn't figure out how to do it.  I then added the message22 def
thinking that perhaps you couldn't print from constructor methods for
some reason.  I then added the print line in the message22 def, just
out of desperation, and was able to make that work, but is not what I
wanted.  Here is my copy from my IDEL attempts:

This is message 1
This is message 1
This is message 1a
>>> test1.message22()
This is message 2
>>> test2.message22()
This is message 2
>>> print test1.message22.message2

Traceback (most recent call last):
  File "<pyshell#39>", line 1, in -toplevel-
    print test1.message22.message2
AttributeError: 'function' object has no attribute 'message2'
>>> print test1.message2

Traceback (most recent call last):
  File "<pyshell#40>", line 1, in -toplevel-
    print test1.message2
AttributeError: 'First' object has no attribute 'message2'
>>> print First.message22.message2

Traceback (most recent call last):
  File "<pyshell#41>", line 1, in -toplevel-
    print First.message22.message2
AttributeError: 'function' object has no attribute 'message2'
>>>

I know this is a very basic question but it's the stupid ones that
always get me.

- Adam



From mailmaverick666 at gmail.com  Fri Mar  9 08:14:30 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Fri, 9 Mar 2007 18:44:30 +0530
Subject: MPI in python?
In-Reply-To: <972566ff0703090436w3d99d2d6hdf76b58a9eebe2b9@mail.gmail.com>
References: <972566ff0703090436w3d99d2d6hdf76b58a9eebe2b9@mail.gmail.com>
Message-ID: <180b672e0703090514m472af558md48b32f71758274b@mail.gmail.com>

try this

http://sourceforge.net/projects/pympi/

On 3/9/07, Joydeep Mitra <snakepit.rattlesnakes at gmail.com> wrote:
>
> Hi guys,
> I am a relatively new user of python.
> I wanted to know what are the minimum requirements (modules, etc) are
> required for paralleliing python programs on a multiproc linux cluster.
> Is there a tutorial that explains the MPI syntax in python with examples?
>
> Thanking in advance,
> Joydeep
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From dd55 at cornell.edu  Wed Mar 14 17:04:00 2007
From: dd55 at cornell.edu (Darren Dale)
Date: Wed, 14 Mar 2007 17:04:00 -0400
Subject: question about class methods
Message-ID: <et9o1i$qfi$1@ruby.cit.cornell.edu>

I've run across some code in a class method that I don't understand:

    def example(self, val=0)
        if val and not self:
            if self._exp < 0 and self._exp >= -6:

I am unfamiliar with some concepts here:

1) Under what circumstances would "if not self" be True?

2) If "not self" is True, how can self have attributes?

(This is slightly simplified code from the decimal.Decimal.__str__ method,
line 826 in python-2.4.4)

Thanks,
Darren


From please.ask at for.it  Sun Mar 11 14:25:42 2007
From: please.ask at for.it (Army1987)
Date: Sun, 11 Mar 2007 19:25:42 +0100
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
Message-ID: <et1hjq$okj$1@tdi.cu.mi.it>


"cesco" <fd.calabrese at gmail.com> ha scritto nel messaggio 
news:1173451441.077648.321270 at c51g2000cwc.googlegroups.com...
>I have to generate a list of N random numbers (integer) whose sum is
> equal to M. If, for example, I have to generate 5 random numbers whose
> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. Is there a
> simple pattern or function in Python to accomplish that?
>
> Thanks and regards
> Francesco


You can initialize a list to [1, 1, 1, 1, 1], and generate 45 random 
integers between 1 and 5, and every time a number is generated, increase the 
Nth number in the list by one.

Not all distinct lists will have the same chance of occurring, e.g. [46, 1, 
1, 1, 1] will be much less likely than [10, 10, 10, 10, 10]. Depending on 
what you need these numbers for, it can be a good thing or a bad thing.

--Army1987




From inq1ltd at verizon.net  Fri Mar  9 13:45:40 2007
From: inq1ltd at verizon.net (jim-on-linux)
Date: Fri, 09 Mar 2007 13:45:40 -0500
Subject: SQLite3 trapping OperationalError
In-Reply-To: <16651e80703091010q36ebbdd1u346009436e9e227e@mail.gmail.com>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<200703091314.49199.inq1ltd@verizon.net>
	<16651e80703091010q36ebbdd1u346009436e9e227e@mail.gmail.com>
Message-ID: <200703091345.40533.inq1ltd@verizon.net>

On Friday 09 March 2007 13:10, Jerry Hill wrote:
> On 3/9/07, jim-on-linux <inq1ltd at verizon.net> 
wrote:
> > However python 2.5,
> > except OperationalError:
> > responds with
> > "OperationalError" is not defined.
>
> I believe that needs to be spelled
> except sqlite3.OperationalError:
>     do_something()
>
> --
> Jerry

Thanks,
 except sqlite3.OperationalError:
works for me.

jim-on-linux


From hg at nospam.org  Sat Mar 31 04:15:26 2007
From: hg at nospam.org (hg)
Date: Sat, 31 Mar 2007 10:15:26 +0200
Subject: wxPython help
References: <OPSdnSqrHZOK6JPbnZ2dnUVZ_vGinZ2d@giganews.com>
Message-ID: <wVuPh.268836$Ju2.32908@newsfe16.lga>

Blh (BlhBlh at Blh) wrote:

> i have installed wxpython v2.6 for python 2.4
> my python installation is at d:\python24
> 
> the statement "import wx" works perfectly
> but when i use "import images", it says that there is no module, but
> i know for a fact that there is.
> 
> can anyone help?
> 
> 
> --
> --------------------------------- --- -- -
> Posted with NewsLeecher v3.8 Beta 8
> Web @ http://www.newsleecher.com/?usenet
> ------------------- ----- ---- -- -

Maybe this:

http://mail.python.org/pipermail/python-list/2002-February/128104.html

hg



From hg at nospam.org  Wed Mar 14 02:52:11 2007
From: hg at nospam.org (hg)
Date: Wed, 14 Mar 2007 07:52:11 +0100
Subject: logging and wx.Timer
Message-ID: <gdSJh.6304$Ng1.1551@newsfe19.lga>

Hi,

I read that logging was thread safe ... but can I use it under a GUI timer ?

Thanks,

hg



From bignose+hates-spam at benfinney.id.au  Wed Mar 21 18:11:51 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 Mar 2007 09:11:51 +1100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
Message-ID: <87k5xa457c.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVE.THIS.cybersource.com.au> writes:

> Is your program valuable? Is it worth money? Then the 90% of script
> kiddies will just wait three days, and download the program off the
> Internet after the real hackers have broken your protection.

The real hackers wouldn't be doing that.

The crackers, however, might.

-- 
 \     "Try to become not a man of success, but try rather to become a |
  `\                                man of value."  -- Albert Einstein |
_o__)                                                                  |
Ben Finney



From exarkun at divmod.com  Sat Mar 24 17:03:33 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sat, 24 Mar 2007 16:03:33 -0500
Subject: Python object overhead?
In-Reply-To: <1174769566.154258.307250@y80g2000hsf.googlegroups.com>
Message-ID: <20070324210333.18920.734248253.divmod.quotient.5372@ohm>

On 24 Mar 2007 13:52:46 -0700, 7stud <bbxx789_05ss at yahoo.com> wrote:
>On Mar 24, 2:19 pm, Jean-Paul Calderone <exar... at divmod.com> wrote:
>> Only one list is created.  It is used to define a C array where attributes
>> will be stored.  Each instance still has that C array, but it has much less
>> overhead than a Python list or dictionary.
>>
>
>It's all C underneath, right?  So a dictionary is what?  Two parallel
>C arrays: one array with the names and one with the values?
>
>When you do this:
>
>__slots__ = ["m", "n"]
>
>there still has to be a mapping between the names "m" and "n" and
>their values.  So aren't two parallel C arrays required again?
>

Not two *per instance* though.  The per-class overhead is roughly irrelevant
since the number of classes is generally small compared to the number of
instances.  If you have a circumstance where this isn't true, then it may
be worth considering per-class overhead rather than focusong on per-instance
overhead as I think most people in this thread have done.

>> Whether this reduction in overhead actually results in a useful or measurable
>> performance improvement is a separate question, of course.
>>
>
>I suppose a dictionary will be required to grow in size, so at
>periodic intervals new, bigger arrays will need to be created, the
>contents copied over, and the old arrays destroyed(similar to a
><vector> in C++).  And of course, the C code that accomplishes all
>that creating, copying and destroying will take up some memory.
>
>Is that what you are talking about when you say "overhead"?
>

I mostly had the Python object overhead and the overallocation overhead
in mind.  The code for resizing dicts is around whether you are using it
or not, after all.  You might want to take a look at the how dicts and
lists and __slots__ are implemented if you're interested in the details.

Jean-Paul


From jon+usenet at unequivocal.co.uk  Sun Mar  4 17:27:00 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 4 Mar 2007 22:27:00 GMT
Subject: multiple content-types break cgi.py
References: <1173002603.690853.250090@p10g2000cwp.googlegroups.com>
	<slrneul7rs.t3l.jon+usenet@snowy.squish.net>
	<1173040160.844329.48050@s48g2000cws.googlegroups.com>
Message-ID: <slrneumhtk.cof.jon+usenet@snowy.squish.net>

In article <1173040160.844329.48050 at s48g2000cws.googlegroups.com>, Janto Dreijer wrote:
>> It's not a bug - sending multiple content-types is just totally broken.
>> What would such a header even be supposed to mean? It's like saying
>> "this is an apple orange".
> 
> Hmmm. Thanks! I suspected as much.
> 
> Rough inspection suggests that calling
>     connection.setRequestProperty("Content-Type", "application/x-www-
> form-urlencoded");
> on the Nokia 6230 would actually cause the value to be *appended* and
> not set.

If that method is inherited from java.net.URLConnection, then if the
phone is behaving as you suggest, its Java library is bugged and
behaving contrary to Sun's Java documentation.


From Dave.Baum at motorola.com  Mon Mar  5 15:02:28 2007
From: Dave.Baum at motorola.com (Dave Baum)
Date: Mon, 05 Mar 2007 14:02:28 -0600
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
Message-ID: <Dave.Baum-A02741.14022805032007@engnntp2.cig.mot.com>

In article <1173119492.198000.252500 at v33g2000cwv.googlegroups.com>,
 "Martin Unsal" <martinunsal at gmail.com> wrote:

> That too... although I think that's unfortunate. If reload() were
> reliable, would you use it? Do you think it's inherently unreliable,
> that is, it couldn't be fixed without fundamentally breaking the
> Python language core?

I wrote a module that wraps __import__ and tracks the dependencies of 
imports.  It then allows you to unload any modules whose source have
changed.  That seemed to work out nicely for multi-module projects.

However, one problem I ran into was that dynamic libraries don't get
reloaded, so if you are doing hybrid C++/Python development then this
doesn't help - you still have to restart the whole python process to
pick up changes in your C++ code.

I also didn't do a ton of testing.  It worked for a few small projects
I was working on, but I stopped using it once I ran into the dynamic
library thing, and at this point I'm used to just restarting python
each time.  I'm sure there are some odd things that some python modules
could do that would interfere with the automatic reloading code I
wrote.

If you're interested in the code, drop me an email.

Dave


From claird at lairds.us  Wed Mar 21 18:28:31 2007
From: claird at lairds.us (Cameron Laird)
Date: Wed, 21 Mar 2007 22:28:31 +0000
Subject: Printing __doc__
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com>
	<ets4qe$i0i$00$1@news.t-online.com>
	<1174510376.417966.110370@e1g2000hsg.googlegroups.com>
Message-ID: <f5o8d4-uns.ln1@lairds.us>

In article <1174510376.417966.110370 at e1g2000hsg.googlegroups.com>,
gtb <goodTweetieBird at hotmail.com> wrote:
>On Mar 21, 3:35 pm, Peter Otten <__pete... at web.de> wrote:
			.
			.
			.
>> >>> import sys
>> >>> def docstring():
>>
>> ...     return sys._getframe(1).f_code.co_consts[0]
>> ...>>> def foo():
>>
>> ...     print "My docstring is %r" % docstring()
>> ...>>> def bar():
>>
>> ...     "bar's docstring"
>> ...     print "My docstring is %r" % docstring()
>> ...>>> foo()
>>
>> My docstring is None>>> bar()
>>
>> My docstring is "bar's docstring"
>>
>> No idea how brittle that might be, though.
>>
>> Peter
>
>Thanks.
>
>Pardon my ignorance, but brittle?
>

Peter is trying to communicate that some aspects of Python are
quite conservative, well-documented, and unlikely to change
across versions or implementations.  The syntax of, let's say,
"def", is an example of such an aspect.

Peter has no particular evidence about the guarantees of the
    sys._getframe(1).f_code.co_consts[0]
resolution; for all he or I know, the core Python maintainers
might change in an upcoming release the implementation of 
co_consts.  That's what I believe he intends you understand by
"brittle".


From wojciech_mula at poczta.null.onet.pl.invalid  Tue Mar 27 11:34:15 2007
From: wojciech_mula at poczta.null.onet.pl.invalid (=?ISO-8859-2?Q?Wojciech_Mu=B3a?=)
Date: Tue, 27 Mar 2007 17:34:15 +0200
Subject: pattern search
In-Reply-To: <mailman.5671.1175008459.32031.python-list@python.org>
References: <mailman.5671.1175008459.32031.python-list@python.org>
Message-ID: <eubdj4$meh$1@atlantis.news.tpi.pl>

Fabian Braennstroem wrote:
> Now, I would like to improve it by searching for different 'real'
> patterns just like using 'ls' in bash. E.g. the entry
> 'car*.pdf' should select all pdf files with a beginning 'car'.
> Does anyone have an idea, how to do it?

Use module glob.


From paddy3118 at googlemail.com  Thu Mar 29 18:13:19 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 29 Mar 2007 15:13:19 -0700
Subject: make RE more cleaver to avoid inappropriate :
	sre_constants.error: redefinition of group name
In-Reply-To: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
References: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
Message-ID: <1175206399.602730.174360@r56g2000hsd.googlegroups.com>

On Mar 29, 3:22 pm, "aspineux" <aspin... at gmail.com> wrote:
> I want to parse
>
> 'foo at bare' or '<foot at bar>' and get the email address foo at bar
>
> the regex is
>
> r'<\w+@\w+>|\w+@\w+'
>
> now, I want to give it a name
>
> r'<(?P<email>\w+@\w+)>|(?P<email>\w+@\w+)'
>
> sre_constants.error: redefinition of group name 'email' as group 2;
> was group 1
>
> BUT because I use a | , I will get only one group named 'email' !
>
> Any comment ?
>
> PS: I know the solution for this case is to use  r'(?P<lt><)?(?P<email>
> \w+@\w+)(?(lt)>)'

use two group names, one for each alternate form and if you are not
concerned with whichever matched do something like the following:

>>> s1 = 'foo at bare'
>>> s2 = '<foo at bare>'
>>> matchobj = re.search(r'<(?P<email1>\w+@\w+)>|(?P<email2>\w+@\w+)', s1)
>>> matchobj.groupdict()['email1'] or matchobj.groupdict()['email2']
'foo at bare'
>>> matchobj = re.search(r'<(?P<email1>\w+@\w+)>|(?P<email2>\w+@\w+)', s2)
>>> matchobj.groupdict()['email1'] or matchobj.groupdict()['email2']
'foo at bare'
>>>

- Paddy.



From gabriel.hase at gmail.com  Wed Mar 21 04:14:59 2007
From: gabriel.hase at gmail.com (killkolor)
Date: 21 Mar 2007 01:14:59 -0700
Subject: replace illegal xml characters
Message-ID: <1174464899.057656.177410@d57g2000hsg.googlegroups.com>

hi!

I am working with InDesign exported xml and parse it in a python
application. I learned here: http://boodebr.org/main/python/all-about-python-and-unicode
that there actually are sets of illegal unicode characters for xml
(and henceforth for every compliant xml parser). I already implemented
a regex solution to replace the characters in question, but I wonder
if there is a efficient and out-of-the-box solution somewhere out
there for this problem. does anybody know?

thanks!
gabriel



From kadarlakiran at yahoo.com  Mon Mar  5 08:48:11 2007
From: kadarlakiran at yahoo.com (kadarla kiran kumar)
Date: Mon, 5 Mar 2007 05:48:11 -0800 (PST)
Subject: implementing SFTP using Python
In-Reply-To: <mailman.14656.1172910604.32030.python-list@python.org>
Message-ID: <586552.89486.qm@web38809.mail.mud.yahoo.com>

  @Ben Finney
   
  I have downloaded paramiko-1.6 package, pcrypto 2.0.1 package
  platform: windows XP
   
  Now Iam trying to run the demo scripts available with paramiko package.
  I have tried using the same system for both cleint(demo_simple.py) and the server(demo_server.py) but it is failing at socket.connect()
   
  Can you please tell me ..what all i need to setup , to establish a conection between Client and server. 
   
  The log of error , when I run demo_simple:
  ==============================
  Hostname: 10.220.10.15:22
hostnmae: 10.220.10.15 port: 22
Username [KiranKumar_Kadarla]: aditya
Warning: Problem with getpass. Passwords may be echoed.
Password for aditya at 10.220.10.15: hi at 12345
*** Unable to open host keys file
hostname:10.220.10.15 port:22
*** Caught exception: <class 'paramiko.AuthenticationException'>: Authentication failed.
Traceback (most recent call last):
  File "C:\paramiko-1.6\paramiko-1.6\demos\demo_simple.py", line 85, in <module>
    t.connect(username=username, password=password, hostkey=hostkey)
  File "C:\Python25\Lib\site-packages\paramiko\transport.py", line 851, in connect
    self.auth_password(username, password)
  File "C:\Python25\Lib\site-packages\paramiko\transport.py", line 1012, in auth_password
    return self.auth_handler.wait_for_response(my_event)
  File "C:\Python25\Lib\site-packages\paramiko\auth_handler.py", line 174, in wait_for_response
    raise e
AuthenticationException: Authentication failed.
Traceback (most recent call last):
  File "C:\paramiko-1.6\paramiko-1.6\demos\demo_simple.py", line 102, in <module>
    sys.exit(1)
SystemExit: 1
   
   
  THANKS IN ADVANCE
  K. KIRAN KUMAR
   
   
   
   
   
   
   
   

kadarla kiran kumar writes:

> I have to implement SFTP conection from client to the server using
> Python script. Iam very new new to python , and i dont't have much
> time to complete this. So I need some pointers from you.

You will probably want to investigate the "paramiko" package, a
pure-Python implementation of the SSH2 protocol.







 
---------------------------------
The fish are biting.
 Get more visitors on your site using Yahoo! Search Marketing.
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From andre.roberge at gmail.com  Thu Mar 15 06:54:00 2007
From: andre.roberge at gmail.com (=?iso-8859-1?B?QW5kcuk=?=)
Date: 15 Mar 2007 03:54:00 -0700
Subject: Python books?
In-Reply-To: <1huzl72.z09y4u1xt7lpsN%aleax@mac.com>
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
	<mailman.4942.1173623618.32031.python-list@python.org>
	<et9n5u$q48$1@panix3.panix.com>
	<1173906223.048740.18050@b75g2000hsg.googlegroups.com>
	<1huzl72.z09y4u1xt7lpsN%aleax@mac.com>
Message-ID: <1173956040.617134.12720@o5g2000hsb.googlegroups.com>

On Mar 15, 2:38 am, a... at mac.com (Alex Martelli) wrote:
> BartlebyScrivener <rpdool... at gmail.com> wrote:
> > On Mar 14, 3:50 pm, a... at pythoncraft.com (Aahz) wrote:
>
> > > Some people prefer shorter books -- Python for Dummies (for new
> > > programmers) and Python in a Nutshell (for experienced programmers) both
> > > try to give a thorough survey of Python while keeping the book easy to
> > > carry.
>
> Not for me to comment about my own books, but I can second your
> recommendation for your "for Dummies" for beginners.

Python in a Nutshell is a favourite of mine; highly recommended.
(However, I do not have the newer version ... yet!)
>
> > And other people like lots of examples and code organized around
> > practical projects a person might like to accomplish using Python. The
> > Python Cookbook 2nd edition is great for this, and Martelli et al are
> > great writers, as well as great programmers.
>
So is the Python Cookbook (i.e. highly recommended).

> If you like _substantial_ examples, rather than the simple/short ones
> typically used in manageable-sized books, Hetland's "Practical Python"
> was also a great buy (I believe it's now been replaced by "Beginning
> Python" by the same author, but unfortunately I haven't seen that one).

I have both; Beginning Python (From Novice to Professional) is a
huge improvement over Practical Python and is my number
one recommendation for a book to read from cover to cover.
(For absolute beginners, there is a book by Dawson
which might be better).  However, Beginning Python covers Python 2.5
which
doesn'te quite fit the requirement of the original poster.
Nonetheless,
on the grand scheme of things, there are so few differences between
2.5
and 2.5 that it should not matter.

I haven't look at Python for Dummies so I can't comment and compare
with other books.

Andr?
>
> In general I dislike books that try to teach a language (or other
> technology) via "substantial examples", because the issues with the
> examples may obscure those with the language or technology; e.g.,
> Stroustrup tries that route in "The C++ Programming Language", as Lutz
> does in "Programming Python", and to my taste the results are inferior.
>
> However, at least in "Practical Python" (can't speak for "Beginning
> Python"), Hetland managed to pull it off -- perhaps by placing the
> substantial programs he develops as successive examples in a clever
> sequence, so that at each step he's not dealing with many diverse new
> issues but just manageably few of them.
>
> Alex




From kyosohma at gmail.com  Fri Mar 30 16:23:43 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 30 Mar 2007 13:23:43 -0700
Subject: Tkinter menu question--how to pass arguments
In-Reply-To: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
References: <85c10$460d65c8$4275d90a$19337@FUSE.NET>
Message-ID: <1175286223.602302.117870@d57g2000hsg.googlegroups.com>

On Mar 30, 2:32 pm, Kevin Walzer <k... at codebykevin.com> wrote:
> I'm having difficulty structuring a Tkinter menu entry. Here is the
> command in question:
>
> self.finkmenu.add_command(label='Update List of Packages',
> command=self.authorizeCommand(self.scanPackages))
>
> When I start my program, it crashes because it's trying to run the
> command self.authorizeCommand. The reason I'm structuring it in this
> fashion is that this command takes another command as an argument--in
> this case, self.ScanPackages.
>
> The basic structure of the program is that the self.authorizeCommand
> function pops up a dialog box for a password; it then feeds the password
> to the function that it takes as an argument, i.e. self.scanPackages.
>
> I tried setting up the menu entry without the additional parameter, i.e.
> command=self.authorizeCommand, but then when I try to run the command
> from the menu, it complains there are not enough arguments.
> Unsurprising, since self.authorizeCommand takes another function name as
> an argument.
>
> How can I structure the menu item to reflect the correct number of
> arguments without it trying to execute the command?
>
> --
> Kevin Walzer
> Code by Kevinhttp://www.codebykevin.com

There are various ways to accomplish this. The 2 most popular that I
am aware of are using a helper function or lambda.

using a lambda:

command=(lambda:self.authorizeCommand(self.scanPackages))


using a handler (i.e. indirection layer):

def func():
   self.authorizeCommand(self.scanPackages)

self.finkmenu.add_command(label='Update List of
Packages',command=func)


Both of these are talked about in detail in "Programming Python 3rd
Ed" by Lutz. I found that helpful for me. Of course, I decided to stop
using Tkinter and switched to wxPython. Hope this gets you going
though.

Mike



From zafere at gmail.com  Fri Mar 16 11:27:23 2007
From: zafere at gmail.com (ozan SARI)
Date: Fri, 16 Mar 2007 17:27:23 +0200
Subject: UpNp messages
Message-ID: <8843bd8a0703160827m2b0bf599t694f7cc996eec4ea@mail.gmail.com>

I  want to   send    messages to a  upnp device ,    and  listen to it's
notify messages. Can  I   do that with   Python.   Can  you  help me and
send  an   example?

Thanks



Ozan
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From steve at REMOVE.THIS.cybersource.com.au  Tue Mar 20 09:29:00 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Wed, 21 Mar 2007 00:29:00 +1100
Subject: Bullet proof passing numeric values from NMEA data stream.
References: <pan.2007.03.20.12.09.21.19785@localhost.localdomain>
Message-ID: <pan.2007.03.20.13.28.59.24933@REMOVE.THIS.cybersource.com.au>

On Tue, 20 Mar 2007 12:09:29 +0000, Doug Gray wrote:

> Folks,
> I am looking for a fast but most importantly a bullet proof method to pass
> and NMEA data stream (GPS output) ascii numeric strings. The best I can
> offer is:
> 
> def fint(a):
>  try: return int(float(a))
>  except: return 0


Will your application calculate the wrong results if it starts getting a
whole lot of spurious zeroes? Wouldn't it better to signal "this value is
invalid" rather than a false zero?

Do you actually want ints? It seems to me that if your data stream is
delivering floats, you're throwing away a lot of data. For example, if the
data stream is: 

2.4, 5.7, 3.9, 5.1, ...

you're getting:

2, 5, 3, 5, ...

which is possibly not even the right way to convert to ints. Shouldn't you
be rounding to nearest (i.e. 2, 6, 4, 5, ...)?

[snip]

> For example, each of the following throw the exception so do not return
> the correct value:
[snip examples]

All your examples include spurious whitespace. If that is the only
problem, here's a simple fix:

def despace(s):
    """Remove whitespace from string s."""
    return 

def fix_data(value):
    """Fix a GPS value string and return as a float."""
    return float(''.join(value.split()))


If only a few values are malformed, you might find this is faster:

def fix_data2(value):
    try:
        return float(value)
    except ValueError:
        return float(''.join(value.split()))

Only measurement with actual realistic data will tell you which is faster.

If you expect to get random non-numeric characters, then here's another
solution:

import string
# initialize some global data
table = string.maketrans("", "") # all 8 bit characters
keep = "1234567890.-+"
dontkeep = ''.join([c for c in table if c not in keep])

def fix_data3(value):
    try: # a fast conversion first
        return float(value)
    except ValueError: # fall-back conversion
        return float(string.translate(value, table, don'tkeep))

Once you've built the character tables, the translate function itself is
executed in C and is very fast.


> Also, why should I consider the string module?  Is it faster/better?

Most of the time you should use string methods, e.g.:

"hello world".upper() 

instead of 

string.upper("hello world")

The only time you should use the string module is when you need one of the
functions (or data objects) that don't exist as string methods (e.g.
translate).



-- 
Steven.



From john.pye at gmail.com  Wed Mar 14 07:02:37 2007
From: john.pye at gmail.com (John Pye)
Date: 14 Mar 2007 04:02:37 -0700
Subject: python/C++ wrapper
In-Reply-To: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
Message-ID: <1173870157.764080.156070@l75g2000hse.googlegroups.com>

Check out this example from NumPy. This would be the way sanctioned by
the scipy community, as you benefit from a large library of matrix
routines that you can use to prepare/postprocess the data.

http://www.scipy.org/Cookbook/SWIG_and_NumPy




From paduffy at cisco.com  Sun Mar  4 14:03:20 2007
From: paduffy at cisco.com (Paul Duffy)
Date: Sun, 04 Mar 2007 14:03:20 -0500
Subject: Python 2.5, problems reading large ( > 4Gbyes) files on win2k
In-Reply-To: <501e09e0703030508i6d92e313sa412d352c998564b@mail.gmail.com>
References: <1172858955.189032.73800@t69g2000cwt.googlegroups.com>
	<501e09e0703030508i6d92e313sa412d352c998564b@mail.gmail.com>
Message-ID: <45EB17F8.4070704@cisco.com>

Bill Tydeman wrote:
> Just curious, but since the file size limitation on NTFS is 4 GB, have 
> you confirmed that it isn't some other part of the interaction that is 
> causing the problem?   What FS is hosting the files?
I don't think that is correct.  Groovy version of app runs just fine.
>
> On 2 Mar 2007 10:09:15 -0800, *paduffy at cisco.com 
> <mailto:paduffy at cisco.com>* <paduffy at cisco.com 
> <mailto:paduffy at cisco.com>> wrote:
>
>     Folks,
>
>     I've a Python 2.5 app running on 32 bit Win 2k SP4 (NTFS volume).
>     Reading a file of 13 GBytes, one line at a time.  It appears that,
>     once the read line passes the 4 GByte boundary, I am getting
>     occasional random line concatenations.  Input file is confirmed good
>     via UltraEdit.  Groovy version of the same app runs fine.
>
>     Any ideas?
>
>     Cheers
>
>     --
>     http://mail.python.org/mailman/listinfo/python-list
>
>
>
>
> -- 
> There is no reason for any individual to have a computer in his home.
>         Ken Olsen, President, Digital Equipment, 1977
>         US computer engineer & industrialist (1926 - )
>


From jsalazar at madisa.com  Tue Mar 27 17:32:59 2007
From: jsalazar at madisa.com (=?ISO-8859-1?Q?Jos=E9_Antonio_Salazar_Montenegro?=)
Date: Tue, 27 Mar 2007 15:32:59 -0600
Subject: Auto execute python in USB flash disk
In-Reply-To: <-bOdnSzyH4JAFJTbnZ2dnUVZ_sWdnZ2d@comcast.com>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
	<-bOdnSzyH4JAFJTbnZ2dnUVZ_sWdnZ2d@comcast.com>
Message-ID: <46098D8B.1010604@madisa.com>

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From dbhbarton at googlemail.com  Fri Mar  9 06:11:13 2007
From: dbhbarton at googlemail.com (dbhbarton at googlemail.com)
Date: 9 Mar 2007 03:11:13 -0800
Subject: 2 new comment-like characters in Python to aid development?
In-Reply-To: <mailman.4849.1173437967.32031.python-list@python.org>
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<mailman.4849.1173437967.32031.python-list@python.org>
Message-ID: <1173438673.423067.103630@30g2000cwc.googlegroups.com>

On Mar 9, 10:59 am, "BJ?rn Lindqvist" <bjou... at gmail.com> wrote:
> On 9 Mar 2007 02:31:14 -0800, dbhbar... at googlemail.com
>
>
>
>
>
> <dbhbar... at googlemail.com> wrote:
> > Thanks for the thoughts.
>
> > > This could be implemented without new syntax: just make your editor
> > > recognize some special comments, and apply the highlighting to the
> > > following block. By example,
>
> > >                 # XXX Remove this when FuruFaifa is fixed to always provide
> > >                 # XXX the names in the same order
> > >                 names.sort()
> > >                 names.reverse()
>
> > Yes I recognise that we can use existing comments for this purpose,
> > and if I was suitably gifted I guess I could try to make the IDE
> > recognise these 'special comments', and maybe even work out what block
> > they're meant to apply to. Of course I'll still argue that the WIP
> > character would be a more elegant, speedy and versatile alternative.
>
> But you are overloading the ? character for a purpose which it totally
> was not meant for. What the character means really depends on what
> person you are asking. To me, it means that what precedes it is
> something someone or something does not know and wants to know the
> answer to. To me, it really does not mean that what follows it is work
> in progress.
>
> Even if I could intuitively tell that a question mark represents a
> work in progress, that information is not very useful. Similarly to
> the "under construction" animated gifs that were popular on the web in
> the mid 90-ties, the symbol does not convey any useful information.
> WHY is it a work in progress? Is there something wrong with it?
>
> ?def foobar():
>     do stuff
>
> The question mark does not leave me any the wiser. Now if you replace
> that question mark with a comment:
>
> # foobar() is buggy because it throws weird exceptions when x = 42.
> def foobar():
>     do stuff
>
> That gives me some useful information.
>
> --
> mvh Bj?rn- Hide quoted text -
>
> - Show quoted text -

perhaps another character would be preferable. '~' perhaps. As to what
you use the WIP character for- in my mind the purpose is to allow an
extra type/level of commenting over and above #, which is inherently
flexible. I could for example choose to use ? (or ~) for blocks I'm
still writing, ?? (or ~~) for blocks that are buggy, and ??? (or ~~~)
for blocks that work but could use optimization. It's a commenting
shortcut for me as the script's developer and its advantage over #
comments are speed or insertion/removal.
Ah but I can see I'm not winning anybody over. I shall graciously
retire!



From psdasilvaX at esotericaX.ptX  Tue Mar 13 12:42:50 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Tue, 13 Mar 2007 16:42:50 +0000
Subject: Request for a change in the csv module.
In-Reply-To: <mailman.5015.1173789734.32031.python-list@python.org>
References: <1173741982.944813@jubilee.claranet.pt>	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>	<1173747644.616698@jubilee.claranet.pt>	<55n53lF25s78sU1@mid.uni-berlin.de>	<1173785251.78605@jubilee.claranet.pt>
	<mailman.5015.1173789734.32031.python-list@python.org>
Message-ID: <1173804572.403491@jubilee.claranet.pt>

skip at pobox.com escreveu:
>     Paulo> That is not the point. The problem is to have things generalized.
> 
> Well, perhaps.  One of the goals of the csv module was to do things the way
> Excel does things.

It would be nice because many csv users use it to export files to
spreadsheets and Excel is certainly a reference. But there may be a
difference! One thing is to do things as Excel does and another is
to write data in a way Excel understands. The later, IMO, is not so
complicated.

  Ideally, that would include formatting elements with
> locale sensitivity.  I've been working on a csv module in Python, so I
> decided to try the locale.format() calls in its writerow implementation.  A
> number of test cases broke as a result because apparently locale.format
> doesn't do its job quite the same way Excel does.
locale.format does not need to write the same way Excel does. It just
should convert in a way Excel understands.
Anyway, a csv user needs to do that if it is not provided by csv.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  9 07:44:12 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 Mar 2007 13:44:12 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
Message-ID: <55d34sF24ijrdU1@mid.individual.net>

dbhbarton at googlemail.com wrote:
>> Those characters have no syntactical meaning...
> 
> ?
> Neither does # until you give it syntactical meaning. I must be
> missing what you mean.

Yes, it has. It says "disregard the following characters until EOL".
If you remove it, the following code will be interpreted as ...
code (and not be disregarded).

A "WIP character" would only be there for tagging and wouldn't
change the program logic. Thus, IMHO, it's useless as a part of the
Python language. Highlighting and tagging is task of editors/IDEs.
 
>> would, IMHO, make the language "dirty".
> 
> Well I'm not a big fan of decorators so I know how you must feel.

Mh, not sure -- why do you have decorators in mind? I don't dislike
them.

> But # FIXME + a hack doesn't seem clean to me. 

I think it's much cleaner to have language and "fixme" levels
separate. "fixme" features can then depend fully on the editor/IDE
and don't have to be part of the source code (though they may).

> And commenting off the bottom half of a long script with triple
> quotes is ugly and a pain and you can't indicate multiple
> alternate halt points as in the 'tutorial script' example I gave.

A proper editor can comment out multiple lines easily.

A smart script can have multiple halt points user-selectable, though
this is a big matter of taste. I think that in this case some kind
of learning environment is better.

Regards,


Bj?rn

-- 
BOFH excuse #23:

improperly oriented keyboard



From khemkaamit at gmail.com  Thu Mar 29 08:19:39 2007
From: khemkaamit at gmail.com (Amit Khemka)
Date: Thu, 29 Mar 2007 17:49:39 +0530
Subject: Weird behavior in search in a list
In-Reply-To: <1360b7230703290515gf47028bjb82dce9e75466dec@mail.gmail.com>
References: <1175169060.414834.235040@d57g2000hsg.googlegroups.com>
	<1360b7230703290515gf47028bjb82dce9e75466dec@mail.gmail.com>
Message-ID: <1360b7230703290519t37e7cca9xb0195d9b06e3f7fe@mail.gmail.com>

> On 29 Mar 2007 04:51:00 -0700, Su Y <suyuancn at gmail.com> wrote:
<snip>
> > I want find the first number in extend[] which is larger than num, so
<snip>

> On 3/29/07, Amit Khemka <khemkaamit at gmail.com> wrote:
> Btw a concise way could be:
> def getfirstbigger(num):
>     for i,x in enumerate(extend):
>         if x>num:    return i
>     return len(extend)

I forgot to add that you can as well 'return' the the item (along with
the index), but in case all the items in the list are smaller than the
argument, what return value do you require?
-- 
----
Amit Khemka -- onyomo.com
Home Page: www.cse.iitd.ernet.in/~csd00377
Endless the world's turn, endless the sun's Spinning, Endless the quest;
I turn again, back to my own beginning, And here, find rest.


From ayaz at dev.slash.null  Thu Mar  8 03:10:54 2007
From: ayaz at dev.slash.null (Ayaz Ahmed Khan)
Date: Thu, 08 Mar 2007 13:10:54 +0500
Subject: Bug in python!? persistent value of an optional parameter
	in	function!
References: <1173321560.973941.158250@h3g2000cwc.googlegroups.com>
	<mailman.4785.1173322611.32031.python-list@python.org>
Message-ID: <pan.2007.03.08.08.10.50.512646@dev.slash.null>

"Gabriel Genellina" typed:
> 
> See  
> http://effbot.org/pyfaq/why-are-default-values-shared-between-objects.htm

Thanks for the link, Gabriel. I didn't know about this.

-- 
Ayaz Ahmed Khan

Falling in love makes smoking pot all day look like the ultimate in
restraint.
                -- Dave Sim, author of "Cerebus".


From http  Thu Mar 22 14:28:27 2007
From: http (Paul Rubin)
Date: 22 Mar 2007 10:28:27 -0800
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174493856.663144.236880@y80g2000hsf.googlegroups.com>
	<1174495236.067618.69030@l77g2000hsb.googlegroups.com>
	<RuyMh.34$ek6.6@newsfe12.lga>
	<mailman.5475.1174587773.32031.python-list@python.org>
Message-ID: <7xd531yvxw.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> > I agree that in you example the first syntax yields a full /five/
> > spaces less than the second syntax. However, it ignores the fact
> > that if you are creating functions with that many arguments, you are
> > probably doing something wrong. Can't those arguments be provided as
> > a list?
> 
> I'm in danger of getting short-tempered on c.l.py for the first time
> in a long time. If you think that five arguments is an excessive
> number for a function then you live in a world of toy programs.

There's no need for functions of more than one argument.  Even in
existing Python syntax, instead of

   def f(a,b,c,d,e): ...

you could say

   def f((a,b,c,d,e)): ...

and receive a,b,c,d,e in a single tuple.


From bj_666 at gmx.net  Fri Mar  9 10:33:02 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 09 Mar 2007 16:33:02 +0100
Subject: Is this right? Multiple imports of same module.
References: <pecora-B92BB8.09304609032007@ra.nrl.navy.mil>
Message-ID: <pan.2007.03.09.15.33.01.991831@gmx.net>

In <pecora-B92BB8.09304609032007 at ra.nrl.navy.mil>, Lou Pecora wrote:

> *In mod1.py
> 
> import mymodule
> 
> *In mod2.py
> 
> import mymodule
> 
> *In mod3.py
> 
> import mymodule as MM
> 
> Then mymodule is imported only once, but each module has access to it 
> through the module name (mod1 and mod2) and the alias MM (mod3).  Is 
> that right?

Yes, that's correct.

Ciao,
	Marc 'BlackJack' Rintsch


From egbert.bouwman at hccnet.nl  Wed Mar  7 10:02:05 2007
From: egbert.bouwman at hccnet.nl (egbert)
Date: Wed, 7 Mar 2007 16:02:05 +0100
Subject: is it possible to give an instance a value?
In-Reply-To: <pan.2007.03.07.03.21.21.381410@REMOVEME.cybersource.com.au>
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
	<pan.2007.03.07.03.21.21.381410@REMOVEME.cybersource.com.au>
Message-ID: <20070307150205.GA13840@hccnet.nl>

On Tue, 06 Mar 2007 14:45:45 -0800, manstey wrote:
> 
> class Test(object):
>      def __init__(self, val):
>            self.val = val
> 
> a = Test('hello')

> Is there a way to make a have the value a.val when it is used as
> above, or as an argument (eg function(a, 10, 'sdf') etc)?
> 
My impression is that you can do everything you want to
by making your instance callable, and not using a but a().

This is just an example:

class Persoon(object):
    def __init__(self, adres):
        self.adres=adres
        
    def __call__(self, new_adres=None):
        if new_adres: self.adres = new_adres
        return self.adres
    
a = Persoon("Sidney")
print "Living in " + a()
a("Canberra")
print "Living in " + a()
print "Now living in ", a("Amsterdam")
print "Type of a() is: %s" % type(a())
print "Now earning" , a(1234) + 500
print "Type of a() is: %s" % type(a())
print "string ? %s" % ["No","Yes"][isinstance(a(), basestring)]

The output is:

Living in Sidney
Living in Canberra
Now living in  Amsterdam
Type of a() is: <type 'str'>
Now earning 1734
Type of a() is: <type 'int'>
string ? No


e
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From aspineux at gmail.com  Fri Mar 30 09:23:17 2007
From: aspineux at gmail.com (aspineux)
Date: 30 Mar 2007 06:23:17 -0700
Subject: A nice way to use regex for complicate parsing
In-Reply-To: <1175182430.111980.253090@e65g2000hsc.googlegroups.com>
References: <1175178887.494344.313070@d57g2000hsg.googlegroups.com>
	<mailman.5757.1175179405.32031.python-list@python.org>
	<1175182430.111980.253090@e65g2000hsc.googlegroups.com>
Message-ID: <1175260997.702403.232520@l77g2000hsb.googlegroups.com>

On 29 mar, 17:33, "Paul McGuire" <p... at austin.rr.com> wrote:
> On Mar 29, 9:42 am, Shane Geiger <sgei... at ncee.net> wrote:
>
> > It would be worth learning pyparsing to do this.
>
> Thanks to Shane and Steven for the ref to pyparsing.  I also was
> struck by this post, thinking "this is pyparsing written in re's and
> dicts".

My first idea was : why learn a parsing library if I can do it using
're'
and dicts :-)

>
> The approach you are taking is *very* much like the thought process I
> went through when first implementing pyparsing.  I wanted to easily
> compose expressions from other expressions.  In your case, you are
> string interpolating using a cumulative dict of prior expressions.
> Pyparsing uses various subclasses of the ParserElement class, with
> operator definitions for alternation ("|" or "^" depending on non-
> greedy vs. greedy), composition ("+"), and negation ("~").  Pyparsing
> also uses its own extended results construct, ParseResults, which
> supports named results fields, accessible using list indicies, dict
> names, or instance names.
>
> Here is the pyparsing treatment of your example (I may not have gotten
> every part correct, but my point is more the similarity of our
> approaches).  Note the access to the smtp parameters via the Dict
> transformer.
>
> -- Paul

Thanks !

Any parsing library I used before were heavy to start with.
The benefit was inversely proportional to the size of the project.
Your look to be lighter, and the results are more easily usable.

Thanks for showing me your lib.

Anyway today I will keep my idea for small parsing.


Alain


>
> from pyparsing import *
>
> # <dotnum> ::= <snum> "." <snum> "." <snum> "." <snum>
> intgr = Word(nums)
> dotnum = Combine(intgr + "." + intgr + "." + intgr + "." + intgr)
>
> # <dot-string> ::= <string> | <string> "." <dot-string>
> string_ = Word(alphanums)
> dotstring = Combine(delimitedList(string_,"."))
>
> # <domain> ::=  <element> | <element> "." <domain>
> domain = dotnum | dotstring
>
> # <q> ::= any one of the 128 ASCII characters except <CR>, <LF>, quote
> ("), or backslash (\)
> # <x> ::= any one of the 128 ASCII characters (no exceptions)
> # <qtext> ::=  "\" <x> | "\" <x> <qtext> | <q> | <q> <qtext>
> # <quoted-string> ::=  """ <qtext> """
> quotedString = dblQuotedString  # <- just use pre-defined expr from
> pyparsing
>
> # <local-part> ::= <dot-string> | <quoted-string>
> localpart = (dotstring | quotedString).setResultsName("localpart")
>
> # <mailbox> ::= <local-part> "@" <domain>
> mailbox = Combine(localpart + "@" + domain).setResultsName("mailbox")
>
> # <path> ::= "<" [ <a-d-l> ":" ] <mailbox> ">"
> # also accept address without <>
> path = "<" + mailbox + ">" | mailbox
>
> # esmtp-keyword    ::= (ALPHA / DIGIT) *(ALPHA / DIGIT / "-")
> esmtpkeyword = Word(alphanums,alphanums+"-")
>
> # esmtp-value      ::= 1*<any CHAR excluding "=", SP, and all
> esmtpvalue = Regex(r'[^= \t\r\n\f\v]*')
>
> # ; syntax and values depend on esmtp-keyword
> #                      control characters (US ASCII 0-31inclusive)>
> # esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
> # esmtp-parameter  ::= esmtp-keyword ["=" esmtp-value]
> esmtpparameters = Dict(
>     ZeroOrMore( Group(esmtpkeyword + Suppress("=") + esmtpvalue) ) )
>
> # esmtp-cmd        ::= inner-esmtp-cmd [SP esmtp-parameters] CR LF
> esmtp_addr = path + \
>                 Optional(esmtpparameters,default=[])\
>                 .setResultsName("parameters")
>
> for t in tests:
>         for keyword in [ 'MAIL FROM:', 'RCPT TO:' ]:
>                 keylen=len(keyword)
>                 if t[:keylen].upper()==keyword:
>                         t=t[keylen:]
>                 break
>
>         try:
>             match = esmtp_addr.parseString(t)
>             print 'MATCH'
>             print match.dump()
>             # some sample code to access elements of the parameters
> "dict"
>             if "SIZE" in match.parameters:
>                 print "SIZE is", match.parameters.SIZE
>             print
>         except ParseException,pe:
>             print 'DONT match', t
>
> prints:
> MATCH
> ['<', ['johnsmith at addresscom'], '>']
> - mailbox: ['johnsmith at addresscom']
>   - localpart: johnsmith
> - parameters: []
>
> MATCH
> [['johnsmith at addresscom']]
> - mailbox: ['johnsmith at addresscom']
>   - localpart: johnsmith
> - parameters: []
>
> MATCH
> ['<', ['johnsmith at addresscom'], '>', ['SIZE', '1234'], ['OTHER',
> '... at bar.com']]
> - OTHER: f... at bar.com
> - SIZE: 1234
> - mailbox: ['johnsmith at addresscom']
>   - localpart: johnsmith
> - parameters: [['SIZE', '1234'], ['OTHER', '... at bar.com']]
>   - OTHER: f... at bar.com
>   - SIZE: 1234
> SIZE is 1234
>
> MATCH
> [['johnsmith at addresscom'], ['SIZE', '1234'], ['OTHER', '... at bar.com']]
> - OTHER: f... at bar.com
> - SIZE: 1234
> - mailbox: ['johnsmith at addresscom']
>   - localpart: johnsmith
> - parameters: [['SIZE', '1234'], ['OTHER', '... at bar.com']]
>   - OTHER: f... at bar.com
>   - SIZE: 1234
> SIZE is 1234
>
> MATCH
> ['<', ['"t... at is.a> legal=email"@addresscom'], '>']
> - mailbox: ['"t... at is.a> legal=email"@addresscom']
>   - localpart: "t... at is.a> legal=email"
> - parameters: []
>
> MATCH
> [['"t... at is.a> legal=email"@addresscom']]
> - mailbox: ['"t... at is.a> legal=email"@addresscom']
>   - localpart: "t... at is.a> legal=email"
> - parameters: []
>
> MATCH
> ['<', ['"t... at is.a> legal=email"@addresscom'], '>', ['SIZE', '1234'],
> ['OTHER', '... at bar.com']]
> - OTHER: f... at bar.com
> - SIZE: 1234
> - mailbox: ['"t... at is.a> legal=email"@addresscom']
>   - localpart: "t... at is.a> legal=email"
> - parameters: [['SIZE', '1234'], ['OTHER', '... at bar.com']]
>   - OTHER: f... at bar.com
>   - SIZE: 1234
> SIZE is 1234
>
> MATCH
> [['"t... at is.a> legal=email"@addresscom'], ['SIZE', '1234'], ['OTHER',
> '... at bar.com']]
> - OTHER: f... at bar.com
> - SIZE: 1234
> - mailbox: ['"t... at is.a> legal=email"@addresscom']
>   - localpart: "t... at is.a> legal=email"
> - parameters: [['SIZE', '1234'], ['OTHER', '... at bar.com']]
>   - OTHER: f... at bar.com
>   - SIZE: 1234
> SIZE is 1234




From silfheed at gmail.com  Tue Mar 27 18:18:54 2007
From: silfheed at gmail.com (Silfheed)
Date: 27 Mar 2007 15:18:54 -0700
Subject: Python automatic testing: mocking an imported module?
Message-ID: <1175033934.795913.292030@l77g2000hsb.googlegroups.com>

Heyas

So we have the following situation: we have a testee.py that we want
to automatically test out and verifiy that it is worthy of being
deployed.  We want our tester.py to test the code for testee.py
without changing the code for testee.py.  testee.py has a module in it
that we want to mock in some tests and in others use the real module.

/foo.py:  (real module)
class bar:
   def __init__(self):
        "I am real"

/foo_fake/foo.py: (fake module)
class bar:
   def ___init__(self):
        "I am a banana"

/testee.py:
import foo
foo.bar()

/tester.py:
from foo_fake import foo
   foo.bar()    # prints I am a banana
   testee.py  # also prints I am a banana
import foo
   foo.bar()   # prints I am real
   testee.py # also prints I am real


This isnt working as we would like, does anyone have any tips  on how
to get something like this working?



From codecraig at gmail.com  Thu Mar 15 10:57:12 2007
From: codecraig at gmail.com (abcd)
Date: 15 Mar 2007 07:57:12 -0700
Subject: Multiline code - trailing slash usage
Message-ID: <1173970632.192949.236050@p15g2000hsd.googlegroups.com>

When do I need to use a trailing slash to separate code over multiple
lines.

For example:

x = "hello world, this is my multiline " + \
     "string!!!!"

x = {'name' : \
      'bob'}

Do I need to use the "\" in the above examples?  When do i need to use
it?



From robert.kern at gmail.com  Thu Mar  1 13:28:58 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 01 Mar 2007 12:28:58 -0600
Subject: Python on a mac: how to build pythonw?
In-Reply-To: <rNOSPAMon-63AA6E.10054801032007@news.gha.chartermi.net>
References: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>	<mailman.4582.1172771922.32031.python-list@python.org>
	<rNOSPAMon-63AA6E.10054801032007@news.gha.chartermi.net>
Message-ID: <es761c$ckf$1@sea.gmane.org>

Ron Garret wrote:
> In article <mailman.4582.1172771922.32031.python-list at python.org>,
>  Robert Kern <robert.kern at gmail.com> wrote:

>> Note that in recent versions of Python, I believe that the pythonw executable 
>> is no longer necessary as a workaround.
> 
> How recent?  I'm already using 2.5.

2.5 definitely works. I think it might have been one of the Universal builds of
2.4 where it started working, but my memory is a bit hazy on that point.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From arkanes at gmail.com  Tue Mar  6 09:07:18 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Tue, 6 Mar 2007 08:07:18 -0600
Subject: Project organization and import
In-Reply-To: <1173166500.640781.252520@t69g2000cwt.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
Message-ID: <4866bea60703060607g261104e6y8c37c51c2679a145@mail.gmail.com>

On 5 Mar 2007 23:35:00 -0800, Martin Unsal <martinunsal at gmail.com> wrote:
> On Mar 5, 11:06 am, "Chris Mellon" <arka... at gmail.com> wrote:
> > I never advocated big files with many functional units - just files
> > that are "just big enough".
>
> Then we're in total agreement. I'm not sure why you thought my
> opinions were the result of baggage from other languages when you
> don't seem to actually disagree with me.
>

Because you're advocating single class per file. A scan through the
standard library may be instructive, where there are some modules that
expose a single class (StringIO, pprint) and others that expose many,
and some that expose none at all. "smallest unit that it makes sense
to work on" and "single class" are totally different things. In any
case, as I hinted at, I prefer an organic, developer driven approach
to deciding these things, not handed down from above style guidelines.
You know your modules are broken up enough when you no longer have
conflicts.

> > Fewer dependencies between compilation units means a
> > faster rebuild-test turnaround.
>
> I know all about incremental builds and I just don't think people use
> small compilation units in C++ to make their builds faster. It
> certainly never been the reason why I subdivided a source file.
>

Faster compile/debug/edit cycle is the main justification I've heard
for single class per file. The others are variations of your RCS
argument, which I don't think is justifiable for the above reasons. It
smells of the kind of "my developers are stupid" short sighted
management that kills projects.

> > Sure, but whats your goal here? If you're just testing something as
> > you work, then this works fine. If you're testing large changes, that
> > affect many modules, then you *need* to reload your world, because you
> > want to make sure that what you're testing is clean.
>
> I don't think reload works for anything but trivial scripts. The
> moment you use "from foo import bar" reload is broken.
>
> > The semantics of exactly what reload should do are tricky. Pythons
> > reload works in a sensible but limited way.
>
> I agree that there is some subtlety there, and I appreciate your
> example. However the fact that Python's module system essentially
> forces you to use "from foo import *" and that reload is almost
> entirely imcompatible with "from foo import *", I would say that
> reload is essentially useless.
>

I'm still not sure why you believe this, since several counterexamples
where given. As an intellectual exercise, though, lets assume that
reload is totally broken and you just can't use it. Pretend it will
reformat your machine if you ever call it. Can you really think of no
other reason to use Python? You still haven't given any justification
for why a magic reload is essential to Python development when a) all
existing python development works fine without it and b) all existing
development in every other language works fine without it.

> > That said, nothing prevents you from using "from foo import Foo" if
> > Foo is all you need (or need most - you can combine this with import
> > foo).
>
> Well "from foo import Foo" is just a special case of "from foo import
> *". :) It still breaks reload. It still means you're restarting your
> interpreter even to do the most trivial development cycle.
>

You're totally fixated on reload. I don't understand this. I'm totally
positive that your traditional development experience has not been in
an environment where you could effortlessly slot in new code to a
running image. Why do you demand it from Python?

Also, the difference between "from foo import Bar" and "from foo
import *" is that the former is limited in scope (you're adding a
limited set of explicit names to your namespace) and is futureproof
(additional names exported from foo won't clash with vars in the
importing module with unknown effects). The reason why one is common
and accepted and the other is frowned upon has nothing to do with
reload().

> > I wonder what environments you worked in before that actually had a
> > reliable and gotcha free version of reload?
>
> I'm perfectly well aware that I'm not going to be able to reload a
> widget in the middle of a running GUI app, for example. I'm not
> looking for gotcha free, I'll settle for minimally useful.
>

Then reload() as is is what you want.

> Here's an analogy. In C, you can do an incremental build and run your
> modified application without having to first reboot your computer. In
> Python, where reload() is essentially the incremental build process,
> and the interpreter is essentially a virtual machine, you guys are
> saying that my best option is to just "reboot" the virtual machine to
> make sure I have a "clean slate". It may be the path of least
> resistance, but to say that it is necessary or inevitable is 1960s
> mainframe thinking.
>

But you do need to restart the application image. The python
interpreter is not an emulator. You're drawing incompatible analogies
and making unjustified assumptions based on them. reload() is not an
incremental build process, and starting a new Python instance is not
rebooting your machine. This is just not a justifiable comparison.


From fred at adventistcare.org  Mon Mar 26 14:32:52 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Mon, 26 Mar 2007 14:32:52 -0400
Subject: Fortran vs Python - Newbie Question
Message-ID: <BB295D7C21C5344E94A3EEBA9089BD940326D4@accmail2.sunbelt.org>

1. Python is fun!
2. Python is cool!
3. Most of the time you can google a solution, i.e. somebody has already
done nearly everything you can think of.

-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of Nomad.C at gmail.com
Sent: Monday, March 26, 2007 8:21 AM
To: python-list at python.org
Subject: Fortran vs Python - Newbie Question


OK...
I've been told that Both Fortran and Python are easy to read, and are
quite useful in creating scientific apps for the number crunching, but
then Python is a tad slower than Fortran because of its a high level
language nature, so what are the advantages of using Python for
creating number crunching apps over Fortran??
Thanks
Chris

-- 
http://mail.python.org/mailman/listinfo/python-list



From pyalbert at gmail.com  Thu Mar  8 08:33:05 2007
From: pyalbert at gmail.com (Ros)
Date: 8 Mar 2007 05:33:05 -0800
Subject: How to check whether file is open or not
In-Reply-To: <mailman.4745.1173260446.32031.python-list@python.org>
References: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
	<mailman.4745.1173260446.32031.python-list@python.org>
Message-ID: <1173360785.090893.112090@t69g2000cwt.googlegroups.com>


Thanks a lot Gabriel.
ctypes is working!

Regards,
Ros




From gigs at hi.t-com.hr  Thu Mar  8 19:07:33 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Fri, 09 Mar 2007 01:07:33 +0100
Subject: tkinter how to write
Message-ID: <esnk48$m4m$1@ss408.t-com.hr>

as I write my first gui program (text editor) I wanna ask you guys how 
to separate code in classes.?
Should I put in one class my menu and in another class text and 
scorllbars etc?

or something else?


thanks


From openopt at ukr.net  Thu Mar 15 03:09:32 2007
From: openopt at ukr.net (dmitrey)
Date: 15 Mar 2007 00:09:32 -0700
Subject: what are Python equivalent to MATLAB persistent or C++ static?
Message-ID: <1173942572.130747.228410@l77g2000hsb.googlegroups.com>

Thank you in advance,
Dmitrey



From giles_brown at hotmail.com  Thu Mar  8 16:35:44 2007
From: giles_brown at hotmail.com (Giles Brown)
Date: 8 Mar 2007 13:35:44 -0800
Subject: SQLAlchemy and Oracle Functions?
In-Reply-To: <1173388785.133560.146300@p10g2000cwp.googlegroups.com>
References: <1173388785.133560.146300@p10g2000cwp.googlegroups.com>
Message-ID: <1173389744.483855.230520@q40g2000cwq.googlegroups.com>

On 8 Mar, 22:19, "Greg Copeland" <gtcopel... at gmail.com> wrote:
> I'm using SQLAlchemy and have a need to call an Oracle function; which
> is not the same as a stored procedure.  Can this be done directory or
> indirectly with SQLAlchemy?  If so, can someone please provide an
> example?  If not, how do I obtain the raw cx_Oracle cursor so I can
> use callfunc directly on that?
>
> Thanks,
>
> Greg

http://www.sqlalchemy.org/docs/sqlconstruction.myt#sql_whereclause_functions
?

SQLAlchemy has its own google group

http://groups.google.co.uk/group/sqlalchemy

You could try asking there too.

Giles



From drochom at googlemail.com  Sun Mar 18 18:32:40 2007
From: drochom at googlemail.com (drochom)
Date: 18 Mar 2007 15:32:40 -0700
Subject: fifo queue
Message-ID: <1174257160.540073.113380@b75g2000hsg.googlegroups.com>

hi,

how would u improve this code?

class queue:
    def __init__(self, size=8):
        self.space = size
        self.data = [None]*self.space
        self.head = 0
        self.tail = 0
        self.len = 0
    def __len__(self): return self.len
    def push(self, x):
        if self.len==self.space:
            self.data.extend( self.data[:self.tail] )
            self.data.extend( [None]* (self.space-self.tail) )
            self.tail+=self.space
            self.space*=2
        self.data[self.tail]=x
        self.tail+=1
        if self.tail==self.space:
            self.tail=0
        self.len+=1
    def pop(self):
        if self.len:
            elem = self.data[self.head]
            self.head+=1
            if self.head==self.space:
                self.head=0
            return elem
    def top(self):
        if self.len==0:
            raise Exception, 'queue is empty'
        return self.data[self.head]

thx in adv.



From jmcmonagle at velseis.com.au  Tue Mar 13 19:08:05 2007
From: jmcmonagle at velseis.com.au (John McMonagle)
Date: Wed, 14 Mar 2007 09:08:05 +1000
Subject: Problem I have with a while loop/boolean/or
In-Reply-To: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
References: <1173825244.368771.273720@e1g2000hsg.googlegroups.com>
Message-ID: <45F72ED5.1010205@velseis.com.au>

israphelr at googlemail.com wrote:
> Hi all.
> 
> I have a problem with some code :(
> 
> -----------
> 
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
> 
> while (hint != 'n') or (hint != 'y'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> so everytime I run the program, and enter my choice as y or n, I'm
> told to 'Please Specify a valid Choice Again' and can't get out of the
> loop.
> 
> 
> 
> -----------
> 
> hint = raw_input("\nAre you stuck? y/n: ")
> hint = hint.lower()
> 
> while (hint != 'n'):
>     hint = raw_input("Please specify a valid choice: ")
> 
> ---------------------------------------------
> 
> As for here when I enter n, I can leave the while loop.
> 
> Anyway I can't put my finger on this, so I'd be real grateful if
> someone could tell me what I've done wrong. Thanks.
> (I have a guy feeling it's something really silly I'm overlooking...)

Try it a different way:

while True:
     hint = raw_input("\nAre you stuck? y/n: ")
     hint = hint.lower()
     if hint != 'y' and hint != 'n':
         print "Please answer y or n"
         continue
     else:
         break
if hint == 'y':
     do_your_hint_stuff()


> 



From aleax at mac.com  Mon Mar 26 22:06:32 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 26 Mar 2007 19:06:32 -0700
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
Message-ID: <1hvlie5.l85qa71gsl65zN%aleax@mac.com>

Nomad.C at gmail.com <Nomad.C at gmail.com> wrote:

> I've been told that Both Fortran and Python are easy to read, and are
> quite useful in creating scientific apps for the number crunching, but

Incidentally, and a bit outside what you asked: if your "number
crunching" involves anything beyond linear systems, run, don't walk, to
get Forman Acton's "Real Computing Made Real",
<http://www.amazon.com/Real-Computing-Made-Engineering-Calculations/dp/0
486442217/ref=ed_oe_p/002-1610918-5308009> -- the original hardback was
a great buy at $50, and now you can have the Dover paperback at $12.44
-- a _steal_, I tell you!

You don't need any programming background (and there's no code in the
book): you need good college-level maths, which is all the book uses (in
abundance).  It doesn't teach you the stuff you can easily find on the
web, such as, say, Newton's method for the numerical solution of general
equations: it teaches you to _understand_ the problems you're solving,
the foibles of numerical computation, how to massage and better
condition your equations not to run into those foibles, when to apply
the classic methods (those you can easily find on the web) and to what
versions of your problems _and why_, etc, etc.  It may be best followed
with a cheap calculator (and lots of graph paper, a pencil, and a good
eraser:-), though Python+matplotlib will be OK and Fortran+some
equivalent plotting library should be fine too.


Let me just give you my favorite, _simplest_ example... say we want to
find the two values of x that solve the quadratic:
  a x**2 + b x + c x = 0

Looks like a primary/middle school problem, right?  We all know:

   x = ( -b +/- sqrt(b**2 - 4 a c) ) / 2 a

so we verify that b**2 > 4 a c (to have two real solutions), take the
square root, then do the sum and the difference of the square root with
- b, and divide by 2 a.  Simple and flawless, right?!

Whoa, says Acton!  What if 4 a c is much smaller than b**2?  Then that
sqrt will be very close to b -- and inevitably, depending on the sign of
b, either the sum or the difference will be a difference between two
numbers that are VERY close to each other.

Such operations are the foremost poison of numeric computation!  When
you take the difference between numbers that are very close, you're
dropping significant digits all over the place: one of your roots will
be well computed, the other one may well be a disaster.

Solution: take EITHER the sum OR the difference -- specifically, the one
that is actually a sum, not a difference, depending on the sign of b.
That gives you one root with good precision.  Then, exploit the fact
that the product of the roots is c/a - compute the other root by
dividing this constant by the root you've just computed, and the
precision will be just as good for the other root, too.


Sure, this is a trick you expect to be already coded in any mathematical
library, in the function that solves quadratics for you -- exactly
because it's so simple and so general.  But the key point is, far too
many people doing "number crunching" ignore even such elementary issues
-- and too many such issues are far too idiosyncratic to specific
equations, quadratures, etc, to be built into any mathematical library
you may happen to be using.  Acton's book should be mandatory reading
for anybody who'll ever need to "crunch numbers"...!-)

(I've taught "Numerical Analysis" to undergrad level engineers, and
while I know I've NOT done anywhere as good a job as Acton does, even
forearming my students with 1/4th of the techniques so well covered in
the book, did, in my opinion, make them better "computors", to borrow
Acton's term, than any of their peers... _I_ was never thought any of
this precious, indispensable stuff in college, I had to pick it all up
later, in the school of hard knocks!-).


Alex


From gagsl-py2 at yahoo.com.ar  Tue Mar 13 19:03:03 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 20:03:03 -0300
Subject: Iterating across a filtered list
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<1173813714.767225.164790@q40g2000cwq.googlegroups.com>
	<7xird5ndey.fsf@ruckus.brouhaha.com>
	<1173817193.179354.235790@p15g2000hsd.googlegroups.com>
	<mailman.5037.1173821479.32031.python-list@python.org>
	<1173823932.685855.241940@n76g2000hsh.googlegroups.com>
Message-ID: <op.to5gzdidx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 19:12:12 -0300, Arnaud Delobelle  
<arnodel at googlemail.com> escribi?:

>> py> import re
>> py> x = re.compile("ijk")
>> py> y = re.compile("ijk")
>> py> x is y
>> True
>>
>> Both, separate calls, returned identical results. You can show the  
>> cache:
>
> OK I didn't realise this.  But even so each time there is the cost of
> looking up the regexp string in the cache dictionary.

Sure, it's much better to create the regex only once. Just to note that  
calling re.compile is not soooooooo bad as it could.

-- 
Gabriel Genellina



From richarddotjebbatpcfltd.co.uk  Fri Mar  2 06:17:48 2007
From: richarddotjebbatpcfltd.co.uk (Richard Jebb)
Date: Fri, 2 Mar 2007 11:17:48 -0000
Subject: Strange method signature via COM
Message-ID: <45e8087b$0$765$5a6aecb4@news.aaisp.net.uk>

We are trying to use the API of a Win32 app which presents the API as a COM
interface. The sample VB code for getting and setting the values of custom
data fields on an object shows a method named Value():

getter        obj.Value("myfield")
setter        obj.Value("myfield") = newvalue

Using Python 2.5 and PythonWin we can get data from data fields using the
identical syntax

>>> print comp.Value("Phone1")
99080980

However the set value fails (unsurprisingly)

>>> comp.value("Phone1") = "6876876876"
SyntaxError: can't assign to function call

Does anyone have any idea how to use Python to address this type of method
signature? Would MakePy allow us to see how we should be calling it?

All suggestions welcome!





From lrahuel.notgood at voila.fr  Fri Mar 16 08:09:07 2007
From: lrahuel.notgood at voila.fr (Laurent Rahuel)
Date: Fri, 16 Mar 2007 13:09:07 +0100
Subject: python noob, multiple file i/o
References: <1174017362.351956.303080@n76g2000hsh.googlegroups.com>
	<1174035726.525608.3340@e1g2000hsg.googlegroups.com>
	<1174036100.468116.60780@l77g2000hsb.googlegroups.com>
Message-ID: <45fa88e4$0$27372$ba4acef3@news.orange.fr>

Maybe the walk method in os module is what you need
http://docs.python.org/lib/os-file-dir.html

Regards

Jon Clements wrote:

> On 16 Mar, 09:02, "Jon Clements" <jon... at googlemail.com> wrote:
>> On 16 Mar, 03:56, "hiro" <Nun... at gmail.com> wrote:
>>
>>
>>
>>
>>
>> > Hi there,
>>
>> > I'm very new to python, the problem I need to solve is whats the "best/
>> > simplest/cleanest" way to read in multiple files (ascii), do stuff to
>> > them, and write them out(ascii).
>>
>> > --
>> > import os
>>
>> > filePath = ('O:/spam/eggs/')
>> > for file in os.listdir(filePath):   #straight from docs
>> >     # iterate the function through all the files in the directory
>> >     # write results to separate files  <- this is where I'm mostly
>> > stuck.
>>
>> > --
>> > For clarity's sake, the file naming conventions for the files I'm
>> > reading from are file.1.txt -> file.nth.txt
>>
>> > It's been a long day, i'm at my wits end, so I apologize in advance if
>> > I'm not making much sense here.
>> > syntax would also be great if you can share some recipes.
>>
>> I'd try the glob module.
>>
>> [code]
>> import glob
>>
>> # Get a list of filenames matching wildcard criteria
>> # (note that path is relative to working directory of program)
>> matching_file_list = glob.glob('O:/spam/eggs/*.txt')
>>
>> # For each file that matches, open it and process it in some way...
>> for filename in matching_file_list:
>>     infile = file(filename)
>>     outfile = file(filename + '.out','w')
>>     # Process the input file line by line...
>>     for line in infile:
>>         pass # Do something more useful here, change line and write to
>> outfile?
>>     # Be explicit with file closures
>>     outfile.close()
>>     infile.close()
>> [/code]
>>
>> Of course, you can change the wild card criteria in the glob
>> statement, and also then filter further using regular expressions to
>> choose only files matching more specific criteria. This should be
>> enough to get you started though.
>>
>> hth
>>
>> Jon.- Hide quoted text -
>>
>> - Show quoted text -
> 
> Okies; postcoding before finishing your early morning coffee is not
> the greatest of ideas!
> 
> I forgot to mention that glob will return pathnames as well. You'll
> need to check that os.path.isfile(filename) returns True before
> processing it...
> 
> Jon.



From MonkeeSage at gmail.com  Sat Mar 10 17:11:59 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 14:11:59 -0800
Subject: Help controlling CDROM from python
In-Reply-To: <mailman.4902.1173538866.32031.python-list@python.org>
References: <mailman.4902.1173538866.32031.python-list@python.org>
Message-ID: <1173564719.644165.38990@8g2000cwh.googlegroups.com>

On Mar 10, 8:27 am, Ognjen Bezanov <Ogn... at mailshack.com> wrote:
> My issue is that I need to be able to eject the CDROM tray even if there
> is no disk inside.

Here's a Q&D version (haven't tested the windows part, it's from an
old mailing list post, but it looks correct):


import os, sys
if 'win' in sys.platform:
    # untested: found in old mailing list post:
    # http://mail.python.org/pipermail/python-win32/2002-November/000593.html
    import win32file
    from win32con import *
    drive = 'D:'
    win32file.CreateFile(r'\\.\\' + drive, GENERIC_READ,
FILE_SHARE_READ,
                         None, OPEN_EXISTING, 0, 0)
    # IOCTL_STORAGE_EJECT_MEDIA = 0x002d4808 from <winioctl.h>
    win32file.DeviceIoControl(h, 0x002d4808, "", 0)
    win32file.CloseHandle(h)
else: # does this work on OSX and BSD?
    import fcntl
    cd_device  = '/dev/cdrom'
    if os.path.islink(cd_device):
        base_path = os.path.dirname(cd_device)
        cd_device = os.readlink(cd_device)
        if not cd_device[0] == '/':
            cd_device = os.path.join(base_path, cd_device)
    cdrom = os.open(cd_device, os.O_RDONLY | os.O_NONBLOCK)
    # CDROMEJECT = 0x5309 from <linux/cdrom.h> on linux 2.6
    fcntl.ioctl(cdrom, 0x5309, 0)
    os.close(cdrom)


NB: If you're using pygame, you can also just use it's builtin
commands:

import pygame.cdrom as cdrom
cdrom.init()
cd = cdrom.CD(0) # 0 = first cdrom device
cd.init()
cd.eject()
cd.quit()
cdrom.quit()

Regards,
Jordan



From paul.sijben at xs4all.nl  Wed Mar  7 05:11:50 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 07 Mar 2007 11:11:50 +0100
Subject: audio video streaming communications
In-Reply-To: <mailman.2399.1168202934.32031.python-list@python.org>
References: <mailman.2399.1168202934.32031.python-list@python.org>
Message-ID: <45EE8FE6.7030508@xs4all.nl>

Hi Ken,

I am looking for something similar. I can do the communications myself
but need to be able to select a video feed, capture it and also need to
display it through wxPython.

Trawled the web and even tried to hire coders to create it for me. So
far I have been having no luck.

I did learn that fastaudio is a good way to bluescreen a WinXP box ;-)

Have you found something?

Paul

Ken Seehart wrote:
> Hello,
> 
> I am looking for a good audio/video conferencing library.  Ideally it
> should work with wxPython (or have some means of making it work there).
> 
> So far my main difficulty in my attempt at searching for such a package
> is that there is so much stuff out there on downloading music and videos.
> 
> I am not interested in download torrents, etc.  I'm just looking video
> conferencing, and live video broadcasts, etc.
> 
> Any recommendations?
> 
> Thanks,
> - Ken
> 
> 



From david at boddie.org.uk  Mon Mar 12 21:35:09 2007
From: david at boddie.org.uk (David Boddie)
Date: Tue, 13 Mar 2007 02:35:09 +0100
Subject: How do I Color a QTableView row in PyQt4
References: <1172685355.820708.149990@q2g2000cwa.googlegroups.com>
	<29fbf$45e61974$54d1d767$18593@news.chello.no>
	<1172757917.160687.228650@z35g2000cwz.googlegroups.com>
	<1172868934.591655.299800@j27g2000cwj.googlegroups.com>
Message-ID: <d6fb8$45f5ffcd$54d1d767$1117@news.chello.no>

<posted & mailed>

On Friday 02 March 2007 21:55, Mel wrote:

[This message is a bit old now. Still...]

> Now that I can change the row colors of QTableView when loading data I
> now need to be able to set the color of the row at anytime.  I've been
> trying by using an item delegate but I'm not sure if I'm using it
> correctly.

Thinking about it a bit, I'd probably avoid using a delegate for this.
Ideally, you want to influence the BackgroundRole for each item in
the row somehow.

> Would I try and set an item delegate for the row and
> change the background color that way?  An example or a link to easy
> to understand documentation on changing a row color for an object
> based on QTableView using QSqlQueryModel as a model would be greatly
> appreciated.  I'm still a bit confused in Qt4.

That's a very specific request! Anyway, using QTableView and
QSqlQueryModel together is quite common, but we can look at a way
to achieve this.

One way would be to store a list of colors in the custom model, or
use another database table to hold them, and access these whenever
you need to return BackgroundRole data for any item in a row.

You could lazily initialize these colors by setting each one when the
corresponding row is accessed for the first time, and only updating
it when the relevant item in the row is modified.

David


From martinunsal at gmail.com  Tue Mar  6 11:42:00 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 08:42:00 -0800
Subject: Project organization and import
In-Reply-To: <45ec8f2c$0$29110$426a34cc@news.free.fr>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<1173084337.538171.35530@c51g2000cwc.googlegroups.com>
	<1173111489.163974.89990@30g2000cwc.googlegroups.com>
	<45ec8f2c$0$29110$426a34cc@news.free.fr>
Message-ID: <1173199320.094675.58350@p10g2000cwp.googlegroups.com>

On Mar 5, 2:18 pm, Bruno Desthuilliers
<bdesth.quelquech... at free.quelquepart.fr> wrote:
> Martin Unsal a ?crit :
> > For example, say
> > you want to organize the widgets package as follows:
>
> > widgets/scrollbar/*.py
> > widgets/form/*.py
> > widgets/common/util.py
>
> > Other than messing around with PYTHONPATH, which is horrible, I don't
> > see how to import util.py from the widget code.
>
> Some of us still manage to do so without messing with PYTHONPATH.

How exactly do you manage it?

The only way I can see to do it is to have widgets/__init__.py look
something like this:

from common import util
from scrollbar import Scrollbar
from form import Form

Then Scrollbar.py doesn't have to worry about importing util, it just
assumes that util is already present in its namespace.

BUT ... this means that Scrollbar.py can only be loaded in the
interpreter as part of package "widgets". You can't run an interpreter
and type "import widgets.scrollbar.Scrollbar" and start going to town,
because Scrollbar doesn't import its own dependencies.

So what I want to clarify here: Do Python programmers try to design
packages so that each file in the package can be individually loaded
into the interpreter and will automatically import its own
dependencies? Or do you design packages so they can only be used by
importing from the top level and running the top level __init__.py?

I hope that made sense. :)

Martin



From Graham.Dumpleton at gmail.com  Fri Mar  9 05:20:44 2007
From: Graham.Dumpleton at gmail.com (Graham Dumpleton)
Date: 9 Mar 2007 02:20:44 -0800
Subject: Configuration: Apache + mod_python
In-Reply-To: <1173427790.920899.91380@v33g2000cwv.googlegroups.com>
References: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>
	<1173352699.270216.48800@s48g2000cws.googlegroups.com>
	<1173358972.661607.38290@t69g2000cwt.googlegroups.com>
	<1173389021.382297.16370@v33g2000cwv.googlegroups.com>
	<1173427790.920899.91380@v33g2000cwv.googlegroups.com>
Message-ID: <1173435644.014337.78840@8g2000cwh.googlegroups.com>

On Mar 9, 7:09 pm, "Danilo" <dbrab... at gmail.com> wrote:
> On 8 Mrz., 22:23, Graham.Dumple... at gmail.com wrote:
>
>
>
> > On Mar 9, 12:02 am, "Danilo" <dbrab... at gmail.com> wrote:
>
> > > On 8 Mrz., 12:18, Graham.Dumple... at gmail.com wrote:
>
> > > > On Mar 8, 9:50 pm, "Danilo" <dbrab... at gmail.com> wrote:
>
> > > > > Hi there,
>
> > > > > is it possible to create a rewrite rule to send every server-request
> > > > > to the directory /py? But only if the file does not exists on the
> > > > > server.
>
> > > > > This is mymod_pythonsection of the apache config-file.
>
> > > > > <Location "/py">
> > > > >         SetHandler python-program
> > > > >         PythonHandler django.core.handlers.modpython
> > > > >         PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
> > > > >         SetEnv DJANGO_SETTINGS_MODULE myapp.settings
> > > > >         PythonDebug Off
> > > > > </Location>
>
> > > > For the more general case of where a HTTP 404 error would otherwise be
> > > > returned, indicating that a resource could not be found, as opposed to
> > > > an actual physical file, you can just use:
>
> > > >   ErrorDocument 404 /py
>
> > > > This would be simpler than using mod_rewrite. I can't remember though
> > > > whether the handler when triggered in this case can change the
> > > > response status to something other than 404.
>
> > > > You could use mod_rewrite if you really must, but not sure how it
> > > > would interact with virtual resources managed by some handler where no
> > > > actual file exists. To be practical you would probably want to
> > > > restrict the scope of mod_rewrite to specific contexts.
>
> > > > Quoting an example from very good book "The Definitive Guide to Apache
> > > > mod_rewrite", you can do something similar to:
>
> > > >   RewriteEngine On
> > > >   # If its not here ...
> > > >   RewriteCond %{REQUEST_FILENAME} !-f
> > > >   RewriteCond %{REQUEST_FILENAME} !-d
> > > >   # Look here instead ...
> > > >   RewriteRule ^/images/(.*) /pics/$1 [PT]
>
> > > > In this case it is causing lookups for images to be made in two
> > > > places, but your case wouldn't be much different.
>
> > > > Graham
>
> > > The rewrite rule works, but now every request ist send to /py.
> > > This is my .conf:
>
> > > <VirtualHost *>
> > >         DocumentRoot /var/www/mydomain.com/htdocs
> > >         ServerName mydomain.com
> > >         ServerAliaswww.mydomain.com
>
> > >         <Location "/py">
> > >                 SetHandler python-program
> > >                 PythonHandler django.core.handlers.modpython
> > >                 PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
> > >                 SetEnv DJANGO_SETTINGS_MODULE myapp.settings
> > >                 PythonDebug Off
> > >         </Location>
>
> > >         RewriteEngine On
> > >         # If its not here...
> > >         RewriteCond %{REQUEST_FILENAME} !-f
> > >         RewriteCond %{REQUEST_FILENAME} !-d
> > >         # Look here instead...
> > >         RewriteRule (.*) /py$1 [PT]
>
> > >         ErrorLog /var/www/mydomain.com/logs/error.log
> > >         CustomLog /var/www/mydomain.com/logs/access.log common
> > > </VirtualHost>
>
> > > Any ideas what is wrong?
>
> > I did say you would probably need to restrict the scope of the
> > mod_rewrite rule to a specific context. In particular, put it inside
> > of a Directory directive corresponding to the file system directory
> > where your files live. Where you have it as the moment,
> > REQUEST_FILENAME probably will not resolve to anything as Apache
> > hasn't yet matched it to the filesystem. Thus:
>
> >   <Directory /some/path/to/document/root>
>
> >         RewriteEngine On
> >         # If its not here...
> >         RewriteCond %{REQUEST_FILENAME} !-f
> >         RewriteCond %{REQUEST_FILENAME} !-d
> >         # Look here instead...
> >         RewriteRule (.*) /py$1 [PT]
>
> >   </Directory>
>
> > Graham
>
> Thank you.
>
> the RewriteCond just needs the absolute path:
>
>         RewriteEngine On
>         # If its not here...
>         RewriteCond /var/www/btsgroup.de/htdocs/%{REQUEST_FILENAME} !-f
>         RewriteCond /var/www/btsgroup.de/htdocs/%{REQUEST_FILENAME} !-d
>         # Look here instead...
>         RewriteRule (.*) /py$1 [PT]

Doing that would probably be considered bad practice. I think the
problem was I neglected to mention you would have to change your
RewriteRule to add a slash when used in Directory directive. Ie., use:

<Directory /var/www/btsgroup.de/htdocs>

        RewriteEngine On
        # If its not here...
        RewriteCond %{REQUEST_FILENAME} !-f
        RewriteCond %{REQUEST_FILENAME} !-d
        # Look here instead...
        RewriteRule (.*) /py/$1 [PT]

</Directory>

Note the slash after /py.

This works for me when I test it.


Graham



From jstroud at mbi.ucla.edu  Sat Mar 24 16:36:21 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 24 Mar 2007 20:36:21 GMT
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <mailman.5559.1174765677.32031.python-list@python.org>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>	<1174758378.274917.170690@p15g2000hsd.googlegroups.com>
	<mailman.5559.1174765677.32031.python-list@python.org>
Message-ID: <9ZfNh.18461$uo3.3767@newssvr14.news.prodigy.net>

Shane Geiger wrote:
> You don't have to uninstall 2.4.4 to use 2.5.  Just change where the 
> symlink points:
> 
> shanegeiger at shane-geigers-computer:~\ 14:45:35$ ls -la /usr/bin/python
> lrwxr-xr-x   1 root  wheel  24 Mar  1 12:48 /usr/bin/python -> 
> /usr/local/bin/python2.5
> shanegeiger at shane-geigers-computer:~\ 14:45:40$
> 

I have been chastised on this list for a similar suggestion (notably 
re-linking /usr/bin/python) as it may break the system because the 
particular version installed may be required for some scripts in the system.

Probably better is to create a link in ~/bin and make sure ~/bin is 
first in the path. Bash experts--please say how to do this because bash 
is default for OSX and is undoubtedly what the OP is using. I use csh.

Better, even than this is to install ipython under 2.5 and put the 
following script in your ~/bin (name it python):

#! /bin/csh -f
#second line of script (include above)

if ($#argv == 0) then
   /usr/local/bin/ipython # <==or wherever ipython is
else
   /usr/local/bin/python2.5 $argv
endif

#end of script

It doesn't matter if you use bash, the above script, though csh, will 
run fine.

Now type this in a terminal: "chmod a+x ~/bin/python".

Now you can use ipython or python depending on whether you supply 
arguments. ipython will launch if you supply none (which means you want 
an interactive interpreter) and "regular" python2.5 will launch if you 
give it a script name--avoiding jumping into the ipython interpreter 
after the script finishes.

If you don't know what ipython is, you are missing out.

James


From Joshua.R.English at gmail.com  Sat Mar 17 14:32:57 2007
From: Joshua.R.English at gmail.com (Joshua.R.English at gmail.com)
Date: 17 Mar 2007 11:32:57 -0700
Subject: Odd error
In-Reply-To: <1174123848.763283.54840@e65g2000hsc.googlegroups.com>
References: <1174109684.594766.320600@l77g2000hsb.googlegroups.com>
	<1174123848.763283.54840@e65g2000hsc.googlegroups.com>
Message-ID: <1174156377.840487.302740@l75g2000hse.googlegroups.com>

I installed it using the regular download form python.org.  I went
back and did a lot of testing with the file, commenting out most of
it, seeing what would actually run, and it seems I had a normal
semantic error:

self.data(one).append(item)

and data is in fact a dictionary, not a callable object.  What gets me
is the massive red herring this error is.  I wasn't doing anything
with ntpath in the script.  The script selectively extracts
information from an XML file, that's all.

Thanks,

Josh

On Mar 17, 2:30 am, "John Machin" <sjmac... at lexicon.net> wrote:
>
> The following demonstrate the correct behaviour of ntpath.split():
>
> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit
> (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.>>> import ntpath
> >>> ntpath.split('foo\\\\')
> ('foo', '')
> >>> ntpath.split('foo\\\\bar\\\\')
> ('foo\\\\bar', '')
> >>> ntpath.split('foo\\\\bar')
> ('foo', 'bar')
> >>> ntpath.split('foo\\bar')
> ('foo', 'bar')
> >>> ntpath.split('\\\\bar')
>
> ('\\\\', 'bar')
>
> I can't see how this error could arise from the line:
> while head2 and head2[-1] in '/\\':
> The only possible iterable is the constant '/\\' ...
>
> You may have a corrupt Python 2.5 installation; try the above tests;
> if one fails, delete any ntpath.pyc and/or ntpath.pyo and try again.
>
> I'm suspicious of the 'lib' directory name; standard Python
> installations on Windows call the directory 'Lib' AFAIK; how did you
> install Python?
>
> HTH,
> John




From grflanagan at yahoo.co.uk  Fri Mar  9 05:30:20 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 9 Mar 2007 02:30:20 -0800
Subject: catching exceptions from an except: block
In-Reply-To: <mailman.4845.1173430612.32031.python-list@python.org>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
	<1173426599.403173.49240@v33g2000cwv.googlegroups.com>
	<mailman.4845.1173430612.32031.python-list@python.org>
Message-ID: <1173436219.937145.12550@64g2000cwx.googlegroups.com>

On Mar 9, 9:56 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Fri, 09 Mar 2007 04:49:59 -0300, Gerard Flanagan
> <grflana... at yahoo.co.uk> escribi?:
>
> > Another version:
>
> > import exceptions
>
> As back in time as I could go (Python 1.5), exceptions were available as
> builtins...
>

I did not know that. Thanks.

> > def onfailFalse(fn):
> >     def inner(*args, **kwargs):
> >         try:
> >             return fn(*args, **kwargs)
> >         except ABCException:
> >             return False
> >     return inner
>
> > @onfailFalse
> > def a(x):
> >     if x == 1:
> >         return 'function a succeeded'
> >     else:
> >         raise ABCException()
>
> There is a serious flaw on this approach, the function can't return any
> false value (it would be treated as a failure).
>

I was teaching myself decorators more than anything, so it's not
thought out to any extent, but even so I don't think it's a "serious
flaw", rather it would be programmer error to use @onfailFalse on a
function that may return False. Don't you think?

Gerard





From gagsl-py2 at yahoo.com.ar  Sat Mar 10 18:59:01 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 10 Mar 2007 20:59:01 -0300
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<7xr6rwhpdb.fsf@ruckus.brouhaha.com>
	<mailman.4922.1173568136.32031.python-list@python.org>
	<7xhcssllyi.fsf@ruckus.brouhaha.com>
Message-ID: <op.tozzknanx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 10 Mar 2007 20:26:13 -0300, Paul Rubin  
<"http://phr.cx"@NOSPAM.invalid> escribi?:

> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:
>> Try again with "%u". Passing i or ui makes no difference, both push
>> the  same value on the stack. C relies on the format string to
>> interpret the  arguments.
>
> If you use %u you get a very large positive value, not +3.

Exactly, and that's the right value. (unsigned int)(-3) isn't +3.

-- 
Gabriel Genellina



From ebgssth at gmail.com  Sat Mar 24 23:53:35 2007
From: ebgssth at gmail.com (js )
Date: Sun, 25 Mar 2007 12:53:35 +0900
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <a23effaf0703242053w3c73189anee196cc374d9d68e@mail.gmail.com>

The only way you can do is rermove python2.4.4's files manually.

I suggest you to use MacPorts or Fink.

With MacPort, you can uninstall python2.4 by doing
$ port uninstall python24

And Installation is
$ port install python25



On 24 Mar 2007 10:30:28 -0700, Robert Hicks <sigzero at gmail.com> wrote:
> I want to upgrade to 2.5 but I don't see any unistall instructions
> anywhere.
>
> Robert
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From raims at dot.com  Sat Mar 17 14:20:40 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Sat, 17 Mar 2007 19:20:40 +0100
Subject: read a web page using python
References: <1174153847.939415.169620@o5g2000hsb.googlegroups.com>
Message-ID: <1hv4wad.w6f1ha13c8hhcN%raims@dot.com>

<myTesterFrench at gmail.com> wrote:
> Kindly, could you someone tell me how to read a page(any web site)
> using Python, what method to be used ?

import urllib2
res = urllib2.urlopen(url)
page = res.read()

See: http://www.voidspace.org.uk/python/articles/urllib2.shtml

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From exarkun at divmod.com  Fri Mar 30 07:07:12 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Fri, 30 Mar 2007 06:07:12 -0500
Subject: socket read timeout
In-Reply-To: <006001c772a2$8a8ccc20$03000080@hendrik>
Message-ID: <20070330110712.18920.1498024264.divmod.quotient.6571@ohm>

On Fri, 30 Mar 2007 08:22:18 +0200, Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>"Jean-Paul Calderone" <ex...n at d...od.com> wrote:
>
>> On Thu, 29 Mar 2007 07:29:35 +0200, Hendrik van Rooyen
><m....l at m.....orp.co.za> wrote:
>
>> >Are sockets full duplex?
>>
>> Uh, yes.
>
>The reason I asked is that I have noticed that other file like objects
>(on Suse 10 Linux and Python 2.4 out of the box) aren't  really:
>
>If you start a blocking read in one thread on a serial port, and you
>then issue a write in another thread, the characters are not transmitted
>until the read completes.  It is as if the "driver" gets busy in the read
>and queues the write - I think a lot of the "My output does not come
>out till I close the programme" type of questions on this group is
>caused by this.   And calling flush makes no difference under these
>circumstances.- you have to unblock and use try - except on the read
>as well.

So posix has this great abstraction around places data can come from and go
to, file descriptors.  But actually it's not so great, because it leaks all
over the place.  Oh well.

Once you get to this level of detail (ie, "is it full duplex?"), then you
really do have to be thinking about what's behind the file descriptor.  A
serial port _can_ be full duplex, but isn't always.  Other kinds of file
descriptors might also be full duplex or they might not be.  It just depends
what the file descriptor really is.

>
>So I was wondering if sockets are the same, as I haven't messed
>with them much- just set up simple client server stuff in a
>"Monkey see, Monkey do" way.
>

Fortunately for us though, TCP sockets are full duplex. :)  Of course, maybe
"full duplex" is an over-simplification.  What does it really mean, anyway?
Does it mean that you can always read at the same time as you are writing?
What does "at the same time" mean anyway?  Oh well, I can just keep assuming
it's just a sort of vague hand-wavey feature. :)

>> >I know Ethernet isn't.
>>
>> Not that this is relevant, but unless you're using a hub, ethernet _is_
>> full duplex.
>
>: - ) Yes the UTP allows point to point full duplex, as there are separate
>receive and transmit pairs.
>
>But the protocol is not called Carrier Sense Multiple Access with
>Collision Detection for nothing. - there can be no collisions in a true
>full duplex channel. And its kind of difficult to swap rx and tx pairs
>if there are more than two endpoints - you need a central point, and then
>the "slaves" can't hear each other unless the central point passes the
>messages on, or does some switching functions.
>
>Reason I mentioned Ethernet is that in most cases (between machines)
>its the underlying technology and if sockets were therefore not actually
>full duplex it would not be surprising.
>
>Is it actually possible to do what I have described for the serial port
>case on a socket and have the message transmitted before one is
>received?  Using a blocking receive?

I'm going to keep saying yes here, but it's hard to explain why without
agreeing on a really detailed definition of "full duplex" and then most
likely also talking about a bunch of things below the TCP interface to
sockets.

Jean-Paul


From MonkeeSage at gmail.com  Thu Mar  8 23:19:34 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 8 Mar 2007 20:19:34 -0800
Subject: I am a new guy on python world
In-Reply-To: <mailman.4837.1173413336.32031.python-list@python.org>
References: <mailman.4837.1173413336.32031.python-list@python.org>
Message-ID: <1173413974.031670.100010@n33g2000cwc.googlegroups.com>

Welcome. :)

Regards,
Jordan



From s.mientki at id.umcn.nl  Mon Mar 26 10:06:07 2007
From: s.mientki at id.umcn.nl (stef)
Date: Mon, 26 Mar 2007 16:06:07 +0200
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174916838.757839.143310@e65g2000hsc.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<mailman.5628.1174916538.32031.python-list@python.org>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
Message-ID: <3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>


>
>   
>> You can get the speed of fortran in Python by using libraries like
>> Numeric without losing the readability of Python.
>>
>>     
>
> Can you back this up with some source??
> Chris
>
>   
Is this really the most important issue in your choice ?

As said by others, "Portability, scalability & RAD" as an advantage of 
Python are probably far more important.

And on the other hand Python is perfect as glue between Fortran and 
whatsoever.
To emphasize that, I expect the number of lines in Python is at least 3 
times less than in Fortran.

I did some comparison between MatLab and Python  (Scipy) for real-time 
analysis,
and for all my cases Pyhton van 3 .. 7 times faster than MatLab.

So I'ld suggest to start with downloading the Enthought edition of Python,
and you can judge for yourself within 10 minutes,
if it's fast enough.

cheers,
Stef Mientki



From gagsl-py2 at yahoo.com.ar  Sun Mar 11 05:29:39 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 06:29:39 -0300
Subject: Database module & multithreading
References: <1173536083.417449.122600@j27g2000cwj.googlegroups.com>
	<45f2bfbd$0$5094$ba4acef3@news.orange.fr>
	<1173537553.064123.13260@t69g2000cwt.googlegroups.com>
	<mailman.4904.1173539770.32031.python-list@python.org>
	<54CIh.6545$M65.2077@newssvr21.news.prodigy.net>
	<slrnev5s51.44o.jon+usenet@snowy.squish.net>
	<2uEIh.14274$bb1.6709@newssvr17.news.prodigy.net>
	<slrnev6nob.oj9.jon+usenet@snowy.squish.net>
Message-ID: <op.to0pzpfox6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 10 Mar 2007 22:44:43 -0300, Jon Ribbens  
<jon+usenet at unequivocal.co.uk> escribi?:

> I don't know, but stock Python 2.5 seems to stick mysterious '.egg'
> files in the site-packages directory when you install things.

Which "stock" Python? Not the one from www.python.org... If you are  
talking about some Linux distro, ask the packagers...

-- 
Gabriel Genellina



From dd55 at cornell.edu  Wed Mar 14 16:14:15 2007
From: dd55 at cornell.edu (Darren Dale)
Date: Wed, 14 Mar 2007 16:14:15 -0400
Subject: string formatting: engineering notation
Message-ID: <et9l3u$e57$1@ruby.cit.cornell.edu>

Does anyone know if it is possible to represent a number as a string with
engineering notation (like scientific notation, but with 10 raised to
multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
decimal.Decimal class, but repeatedly instantiating Decimals is inefficient
for my application (matplotlib plotting library). If it is not currently
possible, do you think the python devs would be receptive to including
support for engineering notation in future releases?

Thanks,
Darren


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Fri Mar  9 05:43:37 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Fri, 09 Mar 2007 11:43:37 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
Message-ID: <55cs24F23meg4U1@mid.individual.net>

dbhbarton at googlemail.com wrote:

> Of course I'll still argue that the WIP character would be a more
> elegant, speedy and versatile alternative.

I don't think so. Those characters have no syntactical meaning and
would, IMHO, make the language "dirty".

Regards,


Bj?rn

-- 
BOFH excuse #73:

Daemons did it



From rocky.bernstein at gmail.com  Tue Mar 27 05:59:31 2007
From: rocky.bernstein at gmail.com (rocky.bernstein at gmail.com)
Date: 27 Mar 2007 02:59:31 -0700
Subject: PDB does not allow jumping to first statement?
In-Reply-To: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
References: <1174946787.291632.154690@n59g2000hsh.googlegroups.com>
Message-ID: <1174989571.857680.318720@o5g2000hsb.googlegroups.com>

On Mar 26, 6:06 pm, "Chris Lasher" <chris.las... at gmail.com> wrote:
> Hi all,
>
> I have a simple script:
>
> ---
> #!/usr/bin/envpython
>
> a = 1
> b = 2
>
> c = a + b
>
> print c
> ---
>
> I launch said script withpdb:
>
> python-mpdbsimple.py
>
> I noticed that I absolutely cannot jump back to the first statement
> (line 3, "a = 1") using the jump command. I can jump to any other line
> BUT the first statement's using the "jump <line number>" command. I
> experience the same behavior with Winpdb and rpdb2. Why is this?
>
> Stumped,
> Chris

I tried on GNU/Linux and Python versions 2.4 and 2.5 and get the same
behavior. Best as I can tell, it looks like a bug in Python. pdb,
pydb, rpdb2 all handle the "jump" command by changing the frame
f_lineno value. When the corresponding code pointer has offset 0 (or
equivalently and more simlply as you put it, is the first statement)
this doesn't seem to work properly. But this also implies that all you
need to do is add something as the first statement. A docstring
comment, e.g.
"this is what my program does..."
comes to mind :-)

Lastly, I'll mention that I what most folks want to do is not jump to
the beginning of the program but rather *restart* it. The difference
here as applied to your example is seen in the way variables (e.g. a,
b, and c) are handled. In a "restart", those names would go back to
being undefined and referring to them before assigning to them would
cause a NameError exception. With "jump", they retain their existing
values.

In pydb (http://bashdb.sf.net/pydb) there are two variations of
restarting a program, one which preserves debugger state ("run") and
one which doesn't ("restart") as it is just a re-exec of the program.
In the presence of multiple threads the exec restart the only reliable
way I know of to force a restart.

Recently in Python's SVN the patch I submitted over a year ago was
applied, so if you prefer pdb and want the "run"-like restart, you can
use that.



From cook_jim at yahoo.com  Sun Mar 18 12:10:22 2007
From: cook_jim at yahoo.com (Jim)
Date: 18 Mar 2007 09:10:22 -0700
Subject: pyCairo
Message-ID: <1174234222.357330.14990@l75g2000hse.googlegroups.com>

I'd like to experiment with pyCairo, but I'm having installation
problems.  I've downloaded cairo 1.4.0, libpng 1.2.8, zlib 1.2.3, and
pycairo 1.4.0, and I've placed the DLLs for cairo, libpng, and zlib in
c:\python25\dlls\.  However, when I run "setup.py install" I get an
error message saying that the installer can't find cairo 1.4.0.  I'm
running Python 2.5 on WinXP.  Any help will be greatly appreciated.



From jura.grozni at gmail.com  Thu Mar  1 09:28:06 2007
From: jura.grozni at gmail.com (azrael)
Date: 1 Mar 2007 06:28:06 -0800
Subject: imagemagick
Message-ID: <1172759286.009577.89600@30g2000cwc.googlegroups.com>

Hy
did anyone manage to work with imahemagick through python. I've been
googling like a crazy for some instalation instructions, but i cant
find anything. please help.

thnx



From jvictor118 at yahoo.fr  Tue Mar 27 10:59:45 2007
From: jvictor118 at yahoo.fr (jvictor118 at yahoo.fr)
Date: 27 Mar 2007 07:59:45 -0700
Subject: Please help!! SAXParseException: not well-formed (invalid token)
Message-ID: <1175007585.758109.127490@r56g2000hsd.googlegroups.com>

I've been using the xml.sax.handler module to do event-driven parsing
of XML files in this python application I'm working on. However, I
keep having really pesky invalid token exceptions. Initially, I was
only getting them on control characters, and a little "sed -e 's/
[^[:print:]]/ /g' $1;" took care of that just fine. But recently, I've
been getting these invalid token excpetions with n-tildes (like the n
in Espa?a), smart/fancy/curly quotes and other seemingly harmless
characters. Specifying encoding="utf-8" in the xml header hasn't
helped matters.

Any ideas? As a last resort, I'd be willing to scrub invalid
characters.... it just seems strange that curly quotes and n-tildes
wouldn't be valid XML! Is that really the case?

TIA!

Jason



From sbassi at clubdelarazon.org  Thu Mar 15 00:31:24 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Thu, 15 Mar 2007 01:31:24 -0300
Subject: Box plot in Python
Message-ID: <9e2f512b0703142131j5377f3c0i67ecd8574f3551b3@mail.gmail.com>

Hello,

Is there a graphic package for Python that provides support for box plots? (see
http://en.wikipedia.org/wiki/Box_plot and
http://en.wikipedia.org/wiki/Image:R-speed_of_light_boxplot.png for
information on box plots).

I have N sets of data, each with X "points".
Example:

Set 1:
Point 1: 0.21
Point 2: 0.92
Point 3: 0.18
Point 4: 0.12
... cut ....
Point 203: 0.91

then:

Set 2:
Point 1: 0.11
Point 2: 0.3
Point 3: 0.82
Point 4: 0.11
... cut ....
Point 191: 0.09

....

I know that R would do it, but I don't know how to use R and would
like to keep on working in Python.

Best,
SB.


From psdasilvaX at esotericaX.ptX  Thu Mar 15 10:54:28 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Thu, 15 Mar 2007 14:54:28 +0000
Subject: Returning other instance from __init__
In-Reply-To: <1huzkla.i6dshw1grnysmN%aleax@mac.com>
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
Message-ID: <1173970438.864747@jubilee.claranet.pt>

Alex Martelli escreveu:
> Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:
...

> 
> E.g.:
> 
> class C1(object):
>     def __new__(cls, xxx):
>         if xxx: return type.__new__(cls, xxx)
>         else: return C1.load(xxx)
>     @staticmethod
>      def load(xxx): return ...whatever...
>      def __init__(self, xxx):
>          if hasattr(self, 'foo'): return
>          self.foo = 'foo'
>          self.bar = 'bar'
> 


Just for a better understanding ...
Can I do this?

class C1(object):
    def __new__(cls, xxx):
        if xxx:
		cls.foo='foo'
		cls.bar='bar'
		return type.__new__(cls, xxx)
        else:
		return C1.load(xxx)
    @staticmethod
    def load(xxx): return ...whatever...
    # OMMIT THE __init__
    # or
    def __init__(self, xxx):
        pass


From rridge at caffeine.csclub.uwaterloo.ca  Thu Mar 15 12:46:38 2007
From: rridge at caffeine.csclub.uwaterloo.ca (Ross Ridge)
Date: Thu, 15 Mar 2007 12:46:38 -0400
Subject: Passing a FILE* from Python into a MinGW/SWIG module
References: <1173869863.712750.239070@d57g2000hsg.googlegroups.com>
Message-ID: <etbt9b$d0h$1@rumours.uwaterloo.ca>

John Pye <john.pye at gmail.com> wrote:
>Is there an official workaround for this? Presumably I need to
>implement a mingw-compatible version of all the 'file' class in
>Python, eg

I'm not familiar with SWIG, but why not pass Python's own file class?
Method calls on Python's file class will be dispatched to C code in
the Python interpreter and so will use the C runtime that Python was
linked with.

					Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge at csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //	  


From ptmcg at austin.rr.com  Sun Mar  4 21:25:09 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 4 Mar 2007 18:25:09 -0800
Subject: How use XML parsing tools on this one specific URL?
In-Reply-To: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
References: <1173030156.276363.174250@i80g2000cwc.googlegroups.com>
Message-ID: <1173061509.389483.159320@s48g2000cws.googlegroups.com>

On Mar 4, 11:42 am, "seber... at spawar.navy.mil"
<seber... at spawar.navy.mil> wrote:
> I understand that the web is full of ill-formed XHTML web pages but
> this is Microsoft:
>
> http://moneycentral.msn.com/companyreport?Symbol=BBBY
>
> I can't validate it and xml.minidom.dom.parseString won't work on it.
>
> If this was just some teenager's web site I'd move on.  Is there any
> hope avoiding regular expression hacks to extract the data from this
> page?
>
> Chris

How about a pyparsing hack instead?  With English-readable expression
names and a few comments, I think this is fairly easy to follow.  Also
note the sample statement at then end showing how to use the results
names to access the individual data fields (much easier than indexing
into a 20-element list!).

(You should also verify you are not running afoul of any terms of
service related to the content of this page.)

-- Paul

=======================
from pyparsing import *
import urllib

# define matching elements
integer = Word(nums).setParseAction(lambda t:int(t[0]))
real = Combine(Word(nums) + Word(".",nums)).setParseAction(lambda
t:float(t[0]))
pct = real + Suppress("%")
date = Combine(Word(nums) + '/' + Word(nums))
tdStart,tdEnd = map(Suppress,makeHTMLTags("td"))
dollarUnits = oneOf("Mil Bil")

# stats are one of two patterns - single value or double value stat,
wrapped in HTML <td> tags
# also, attach parse action to make sure each matches only once
def statPattern(name,label,statExpr=real):
    if (isinstance(statExpr,And)):
        statExpr.exprs[0] = statExpr.exprs[0].setResultsName(name)
    else:
        statExpr = statExpr.setResultsName(name)
    expr = tdStart + Suppress(label) + tdEnd + tdStart + statExpr +
tdEnd
    return expr.setParseAction(OnlyOnce(lambda t:None))

def bistatPattern(name,label,statExpr1=real,statExpr2=real):
    expr = (tdStart + Suppress(label) + tdEnd +
            tdStart + statExpr1 + tdEnd +
            tdStart + statExpr2 + tdEnd).setResultsName(name)
    return expr.setParseAction(OnlyOnce(lambda t:None))

stats = [
    statPattern("last","Last Price"),
    statPattern("hi","52 Week High"),
    statPattern("lo","52 Week Low"),
    statPattern("vol","Volume", real + Suppress(dollarUnits)),
    statPattern("aveDailyVol_13wk","Average Daily Volume (13wk)", real
+ Suppress(dollarUnits)),
    statPattern("movingAve_50day","50 Day Moving Average"),
    statPattern("movingAve_200day","200 Day Moving Average"),
    statPattern("volatility","Volatility (beta)"),
    bistatPattern("relStrength_last3","Last 3 Months", pct, integer),
    bistatPattern("relStrength_last6","Last 6 Months", pct, integer),
    bistatPattern("relStrength_last12","Last 12 Months", pct,
integer),
    bistatPattern("sales","Sales", real+Suppress(dollarUnits), pct),
    bistatPattern("income","Income", real+Suppress(dollarUnits), pct),
    bistatPattern("divRate","Dividend Rate", real, pct | "NA"),
    bistatPattern("divYield","Dividend Yield", pct, pct),
    statPattern("curQtrEPSest","Qtr("+date+") EPS Estimate"),
    statPattern("curFyEPSest","FY("+date+") EPS Estimate"),
    statPattern("curPE","Current P/E"),
    statPattern("fwdEPSest","FY("+date+") EPS Estimate"),
    statPattern("fwdPE","Forward P/E"),
    ]

# create overall search pattern - things move faster if we verify that
we are positioned
# at a <td> tag before going through the MatchFirst group
statSearchPattern = FollowedBy(tdStart) + MatchFirst(stats)

# SETUP IS DONE - now get the HTML source
# read in web page
pg = urllib.urlopen("http://moneycentral.msn.com/companyreport?
Symbol=BBBY")
stockHTML = pg.read()
pg.close()

# extract and merge statistics
ticker =
sum( statSearchPattern.searchString(stockHTML),ParseResults([]) )

# print them out
print ticker.dump()
print ticker.last, ticker.hi,ticker.lo,ticker.vol,ticker.volatility

-----------------------
prints:
[39.549999999999997, 43.32, 30.920000000000002, 2.3599999999999999,
2.7400000000000002, 40.920000000000002, 37.659999999999997,
0.72999999999999998, 1.5, 55, 15.5, 69, 9.8000000000000007, 62,
6.2999999999999998, 19.399999999999999, 586.29999999999995,
27.199999999999999, 0.0, 'NA', 0.0, 0.0, 0.78000000000000003,
2.1499999999999999, 19.399999999999999, 2.3900000000000001,
18.399999999999999]
- aveDailyVol_13wk: 2.74
- curFyEPSest: 2.15
- curPE: 19.4
- curQtrEPSest: 0.78
- divRate: [0.0, 'NA']
- divYield: [0.0, 0.0]
- fwdEPSest: 2.39
- fwdPE: 18.4
- hi: 43.32
- income: [586.29999999999995, 27.199999999999999]
- last: 39.55
- lo: 30.92
- movingAve_200day: 37.66
- movingAve_50day: 40.92
- relStrength_last12: [9.8000000000000007, 62]
- relStrength_last3: [1.5, 55]
- relStrength_last6: [15.5, 69]
- sales: [6.2999999999999998, 19.399999999999999]
- vol: 2.36
- volatility: 0.73
39.55 43.32 30.92 2.36 0.73



From paul at boddie.org.uk  Fri Mar  9 06:25:24 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 9 Mar 2007 03:25:24 -0800
Subject: Python-friendly hosting (was Re: merits of Lisp vs Python)
In-Reply-To: <kO2Ih.1307$yW.914@newssvr11.news.prodigy.net>
References: <1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<RxPHh.10406$tD2.5273@newsread1.news.pas.earthlink.net>
	<mailman.4809.1173377788.32031.python-list@python.org>
	<7xabynh9af.fsf@ruckus.brouhaha.com>
	<kO2Ih.1307$yW.914@newssvr11.news.prodigy.net>
Message-ID: <1173439524.280366.203040@v33g2000cwv.googlegroups.com>

On 9 Mar, 02:32, John Nagle <n... at animats.com> wrote:
>

[Dedicated server offerings]

I'm not so familiar with dedicated servers, being unlikely to buy into
that kind of hosting any time soon - I'm not running a business with
serious reliability/control/uptime constraints where I could justify
spending that kind of money. However...

>      In neither case is the Python environment typically ready for serious use
> out of the box.

Well, I can't say much about the off-the-shelf, locked down solutions
with Plesk control panels, but if you just get a box with the pipes
("an empty machine in a rack"), you make from that what you will. Such
a solution isn't likely to be any good for Perl, PHP or Ruby out of
the box, either. I mean, what's the operating system? Do you have to
provide that? If so, any modern GNU/Linux distribution would give you
lots of acceptable packages for Python.

>      There's denial in the Python community that this is a problem, but it is.
> The Ruby on Rails people get it; they work to provide a seamless experience
> for web developers.  Which is why their market share is way up over two years
> ago.

They got a number of things right. However, the big difference as I
see it is that instead of wondering why various providers don't
support Rails, they've either gone and started their own (including
virtual private server solutions), or they've found existing, flexible
providers (such as WebFaction) who were already providing lots of
plumbing for various Python-based solutions and persuaded them to
provide support for Rails. Last time I looked, Rails deployment
situation seemed closely tied to FastCGI and a lot of other stuff that
is arguably less attractive to various hosting providers than many of
the ways you can deploy Python Web solutions.

As for the denial, I can see your point to an extent. Before the Rails
hype there were discussions about making Python solutions as
attractive to deploy as PHP solutions, but a lot of the "movers and
shakers" in the Python Web community seem to have the luxury of
managing their own Internet-facing infrastructure. Thus, any progress
really has to be driven by people like you with your own hosting
requirements.

Paul



From m.n.summerfield at googlemail.com  Fri Mar  2 11:17:50 2007
From: m.n.summerfield at googlemail.com (m.n.summerfield at googlemail.com)
Date: 2 Mar 2007 08:17:50 -0800
Subject: A more navigable Python Library Reference page
Message-ID: <1172852270.824499.305880@z35g2000cwz.googlegroups.com>

Although a fan of Python, I find the Python Library Reference page
(lib.html) very inconvenient because of its book contents-like layout.
Also, some things that seem to me to belong together, such as string
methods and string services are dispersed. Another annoyance is that
it is
so verbose: this is good for Python newbies, but frustrating once you
know
what you want to find.

So I now use a tiny Python script to read lib.html and produce a new
HTML
file, with a few manual tweaks to get something that addresses the
issues
I've mentioned.

Google doesn't seem to let you add attachments so I've put a sample of
the output here:
http://www.qtrac.eu/libindex.html
at the bottom of the page there is a link to the ~100 line libindex.py
script that generated it.



From http  Sun Mar 18 18:51:58 2007
From: http (Paul Rubin)
Date: 18 Mar 2007 14:51:58 -0800
Subject: fifo queue
References: <1174257160.540073.113380@b75g2000hsg.googlegroups.com>
Message-ID: <7x3b42rwq9.fsf@ruckus.brouhaha.com>

Unless the queue is really large, just use the pop operation to get
stuff off the top of the queue.  That causes O(n) operations but it
should be fast if n is small.

    class queue(list):
        push = append
        def pop(self):
            return list.pop(self,0)

should do about what you wrote.


From devrim.erdem at gmail.com  Fri Mar 30 10:19:48 2007
From: devrim.erdem at gmail.com (DE)
Date: 30 Mar 2007 07:19:48 -0700
Subject: Indentation for code readability
In-Reply-To: <pan.2007.03.30.13.23.40.465374@REMOVE.THIS.cybersource.com.au>
References: <1175245483.829907.89240@r56g2000hsd.googlegroups.com>
	<pan.2007.03.30.13.23.40.465374@REMOVE.THIS.cybersource.com.au>
Message-ID: <1175264388.088130.73970@y80g2000hsf.googlegroups.com>

>
> I don't understand why you are indenting
> the function calls. What does the
> indentation and spacing signify?

The indentation of function calls increases readability not in the
sense that it is easier to decrypt the code, but rather it is
analogous to the coordinate system transformations these matrix push
and pop calls perform..



From MonkeeSage at gmail.com  Sat Mar 10 20:19:38 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 17:19:38 -0800
Subject: number generator
In-Reply-To: <7xbqj01u9c.fsf@ruckus.brouhaha.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
Message-ID: <1173575978.699090.313770@64g2000cwx.googlegroups.com>

On Mar 10, 6:47 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> The fencepost method still seems to be simplest:
>
>     t = sorted(random.sample(xrange(1,50), 4))
>     print [(j-i) for i,j in zip([0]+t, t+[50])]

Simpler, true, but I don't think it gives any better distribution...

import random
def cheat(n, m):
    N, M = n, m
    D    = M/N
    O    = [D] * N
    C    = []
    for i in O:
        C.append(random.randint(1, D-1))
    for i in range(0, len(O), 2):
        O[i] -= C[i]
        if i == len(O)-1:
            O[random.randint(0, i-1)] += C[i]
        else:
            O[i+1] += C[i]
    print 'CHEAT:'
    print O

def fence(n, m):
    t = sorted(random.sample(xrange(1,m), n-1))
    print 'FENCE:'
    print [(j-i) for i,j in zip([0]+t, t+[m])]

for i in range(10):
    print 'Run: %d:' % (i+1)
    cheat(10, 80)
    fence(10, 80)
    print

Output:

Run: 1:
CHEAT:
[1, 15, 1, 15, 5, 11, 5, 11, 1, 15]
FENCE:
[4, 9, 24, 7, 3, 9, 11, 7, 3, 3]

Run: 2:
CHEAT:
[1, 15, 5, 11, 5, 11, 1, 15, 7, 9]
FENCE:
[15, 12, 13, 7, 1, 4, 5, 6, 4, 13]

Run: 3:
CHEAT:
[1, 15, 3, 13, 3, 13, 2, 14, 7, 9]
FENCE:
[2, 9, 12, 15, 4, 5, 2, 3, 19, 9]

Run: 4:
CHEAT:
[7, 9, 2, 14, 5, 11, 4, 12, 3, 13]
FENCE:
[2, 2, 4, 7, 1, 11, 15, 13, 6, 19]

Run: 5:
CHEAT:
[5, 11, 3, 13, 5, 11, 7, 9, 4, 12]
FENCE:
[2, 4, 11, 10, 13, 16, 2, 18, 1, 3]

Run: 6:
CHEAT:
[5, 11, 3, 13, 2, 14, 6, 10, 1, 15]
FENCE:
[1, 4, 13, 5, 2, 26, 5, 4, 16, 4]

Run: 7:
CHEAT:
[4, 12, 4, 12, 4, 12, 4, 12, 5, 11]
FENCE:
[8, 3, 5, 15, 8, 15, 2, 3, 10, 11]

Run: 8:
CHEAT:
[3, 13, 5, 11, 6, 10, 1, 15, 2, 14]
FENCE:
[25, 15, 2, 5, 2, 10, 6, 1, 9, 5]

Run: 9:
CHEAT:
[6, 10, 3, 13, 2, 14, 1, 15, 5, 11]
FENCE:
[11, 9, 3, 3, 7, 4, 8, 28, 1, 6]

Run: 10:
CHEAT:
[2, 14, 3, 13, 6, 10, 2, 14, 2, 14]
FENCE:
[12, 5, 23, 2, 3, 4, 4, 11, 5, 11]

Granted, I'm just eyeballing it, but they look fairly equal in terms
of distribution.

Regards,
Jordan



From nospam at invalid.com  Sat Mar 10 12:32:46 2007
From: nospam at invalid.com (Jack)
Date: Sat, 10 Mar 2007 09:32:46 -0800
Subject: unsigned integer?
Message-ID: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>

This is a naive question:

"%u" % -3

I expect it to print 3. But it still print -3.

Also, if I have an int, I can convert it to unsigned int in C:
   int i = -3;
   int ui = (unsigned int)i;

Is there a way to do this in Python? 




From gagsl-py2 at yahoo.com.ar  Wed Mar 28 19:10:54 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 28 Mar 2007 20:10:54 -0300
Subject: XML/encoding/prolog/python hell...
References: <1175103659.463125.39370@y66g2000hsf.googlegroups.com>
	<1175105188.258960.191650@n59g2000hsh.googlegroups.com>
Message-ID: <op.tpw9cgizx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 28 Mar 2007 15:06:28 -0300, <kyosohma at gmail.com> escribi?:

> You could probably also use a combination of the csv module and the
> pyxml module (links below).
>
> http://pyxml.sourceforge.net/topics/

Note the pyxml summary page on SourceForge: "PyXML is no longer  
maintained."

-- 
Gabriel Genellina



From jvictor118 at yahoo.fr  Tue Mar 27 13:11:21 2007
From: jvictor118 at yahoo.fr (jvictor118 at yahoo.fr)
Date: 27 Mar 2007 10:11:21 -0700
Subject: Please help!! SAXParseException: not well-formed (invalid token)
In-Reply-To: <56sqr5F29auttU1@mid.uni-berlin.de>
References: <1175007585.758109.127490@r56g2000hsd.googlegroups.com>
	<56sqr5F29auttU1@mid.uni-berlin.de>
Message-ID: <1175015481.265701.206970@d57g2000hsg.googlegroups.com>

I checked the file format (of the file containing the n-tilde - ?) and
it is indeed UTF-8! I'm baffled! Any ideas?

Thanks,
Jason

On Mar 27, 11:16 am, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> jvictor... at yahoo.fr wrote:
> > I've been using the xml.sax.handler module to do event-driven parsing
> > of XML files in this python application I'm working on. However, I
> > keep having really pesky invalid token exceptions. Initially, I was
> > only getting them on control characters, and a little "sed -e 's/
> > [^[:print:]]/ /g' $1;" took care of that just fine. But recently, I've
> > been getting these invalid token excpetions with n-tildes (like the n
> > in Espa?a), smart/fancy/curly quotes and other seemingly harmless
> > characters. Specifying encoding="utf-8" in the xml header hasn't
> > helped matters.
>
> > Any ideas? As a last resort, I'd be willing to scrub invalid
> > characters.... it just seems strange that curly quotes and n-tildes
> > wouldn't be valid XML! Is that really the case?
>
> It's not the case, unless you have a wrong encoding. Then the whole
> XML-Document isn't a XML-document at all.
>
> Just putting an encoding header that doesn't match the actually used
> encoding won't fix that.
>
> Read up on what encodings are, and ensure your XML-generation respects that.
> Then reading these files will cause no problems.
>
> Diez



From paul at boddie.org.uk  Thu Mar 29 08:53:07 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 29 Mar 2007 05:53:07 -0700
Subject: Long way around UnicodeDecodeError,
	or 'ascii' codec can't decode byte
In-Reply-To: <1175142370.740773.190400@e65g2000hsc.googlegroups.com>
References: <1175142370.740773.190400@e65g2000hsc.googlegroups.com>
Message-ID: <1175172787.832055.223350@n76g2000hsh.googlegroups.com>

On 29 Mar, 06:26, "Oleg  Parashchenko" <ole... at gmail.com> wrote:
> Hello,
>
> I'm working on an unicode-aware application. I like to use "print" to
> debug programs, but in this case it was nightmare. The most popular
> result of "print" was:
>
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xXX in position
> 0: ordinal not in range(128)

What does sys.stdout.encoding say?

> I spent two hours fixing it, and I hope it's done. The solution is one
> of the ugliest hack I ever written, but it solves the pain. The full
> story and the code is in my blog:
>
> http://uucode.com/blog/2007/03/23/shut-up-you-dummy-7-bit-python/

Calling sys.setdefaultencoding might not even help in this case, and
the consensus is that it may be harmful to your code's portability
[1]. Writing output to a terminal may be influenced by your locale,
but I'm not convinced that going through all the locale settings and
setting the character set is the best approach (or even the right
one).

What do you get if you do this...?

import locale
locale.setlocale(locale.LC_ALL, "")
print locale.getlocale()

What is your terminal encoding?

Usually, if I'm wanting to print Unicode objects, I explicitly encode
them into something I know the terminal will support. The codecs
module can help with writing Unicode to streams in different
encodings, too.

Paul

[1] http://groups.google.com/group/comp.lang.python/msg/431017a4cb4bb8ea



From george.sakkis at gmail.com  Sun Mar 18 19:35:28 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 18 Mar 2007 16:35:28 -0700
Subject: list comprehension help
In-Reply-To: <1hv62q7.1r5ow4v1hzcpd7N%aleax@mac.com>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<mailman.5248.1174235057.32031.python-list@python.org>
	<pan.2007.03.18.16.44.22.267421@gmx.net>
	<mailman.5250.1174236797.32031.python-list@python.org>
	<1hv62q7.1r5ow4v1hzcpd7N%aleax@mac.com>
Message-ID: <1174260927.973118.131360@p15g2000hsd.googlegroups.com>

On Mar 18, 1:40 pm, a... at mac.com (Alex Martelli) wrote:
> rkmr... at gmail.com <rkmr... at gmail.com> wrote:
> > On 3/18/07, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> > > In <mailman.5248.1174235057.32031.python-l... at python.org>, Daniel Nogradi
> > > wrote:
>
> > > >> f = open('file.txt','r')
> > > >> for line in f:
> > > >>         db[line.split(' ')[0]] = line.split(' ')[-1]
> > > >>         db.sync()
>
> > > > What is db here? Looks like a dictionary but that doesn't have a sync
> > > >method.
>
> > > Shelves (`shelve` module) have this API.  And syncing forces the changes
> > > to be written to disks, so all caching and buffering of the operating
> > > system is prevented.  So this may slow down the program considerably.
>
> > It is a handle for bsddb
>
> > import bsddb
> > db=bsddb.hashopen('db_filename')
> > Syncing will defenitely slow down. I will slow that down. But is there
> > any improvement I can do to the other part the splitting and setting
> > the key value/pair?
>
> Unless each line is huge, how exactly you split it to get the first and
> last blank-separated word is not going to matter much.
>
> Still, you should at least avoid repeating the splitting twice, that's
> pretty obviously sheer waste: so, change that loop body to:
>
>     words = line.split(' ')
>     db[words[0]] = words[-1]
>
> If some lines are huge, splitting them entirely may be far more work
> than you need.  In this case, you may do two partial splits instead, one
> direct and one reverse:
>
>     first_word = line.split(' ', 1)[0]
>     last_word = line.rsplit(' ', 1][-1]
>     db[first_word] = last_word

I'd guess the following is in theory faster, though it might not make
a measurable difference:

    first_word = line[:line.index(' ')]
    last_word = line[line.rindex(' ')+1:]
    db[first_word] = last_word

By the way, a gotcha is that the file iterator yields lines that
retain the newline character; you have to strip it off if you don't
want it, either with .rstrip('\n') or (at least on *n*x) omit the last
character:
    last_word = line[line.rindex(' ')+1 : -1]

George



From joncle at googlemail.com  Mon Mar 19 12:49:09 2007
From: joncle at googlemail.com (Jon Clements)
Date: 19 Mar 2007 09:49:09 -0700
Subject: Boost Python properties/getter functions for strings
In-Reply-To: <1174322444.663045.82200@d57g2000hsg.googlegroups.com>
References: <1174312916.127830.303550@o5g2000hsb.googlegroups.com>
	<1174320047.732767.101930@e65g2000hsc.googlegroups.com>
	<1174322444.663045.82200@d57g2000hsg.googlegroups.com>
Message-ID: <1174322949.392096.227650@e1g2000hsg.googlegroups.com>

On 19 Mar, 16:40, "Shawn  McGrath" <shawn.mcgr... at gmail.com> wrote:
> On Mar 19, 12:00 pm, "Shawn  McGrath" <shawn.mcgr... at gmail.com> wrote:
>
> > I forgot to mention, getname is defined as:
> > const std::string &Entity::getName() const;
>
> After more reading I found the copy_const_reference, and replaced:
>  boost::python::return_internal_reference<>());
> with:
>
> boost::python::return_value_policy<boost::python::copy_const_reference>());
>
> and it fixed my problem.  Is there any downside to using
> copy_const_reference over return_internal_reference?

You might get some answers here; if not, can I suggest
http://mail.python.org/mailman/listinfo/c++-sig ? I think a lot of the
Boost.Python developers hang around on that list.


hth,

Jon.




From nagle at animats.com  Wed Mar  7 21:03:59 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 02:03:59 GMT
Subject: merits of Lisp vs Python
In-Reply-To: <LWHHh.1355$_a1.157@bignews7.bellsouth.net>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<LWHHh.1355$_a1.157@bignews7.bellsouth.net>
Message-ID: <jaKHh.1974$uo3.161@newssvr14.news.prodigy.net>

Brian Adkins wrote:
> John Nagle wrote:

> If you want to restart a debate, please go back and reply to some 
> serious post in the thread - don't hijack mine for your own evil 
> purposes and cut out the good parts - did you even see the movie?

    If you want to post jokes, try rec.humor.funny.  Although
they mave moderation and you may not

				John Nagle


From paddy3118 at googlemail.com  Sun Mar 11 03:52:48 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 10 Mar 2007 23:52:48 -0800
Subject: minimum age to learn python (a.k.a graphical vs text languages)
In-Reply-To: <mailman.4905.1173540820.32031.python-list@python.org>
References: <mailman.4905.1173540820.32031.python-list@python.org>
Message-ID: <1173599568.208998.61850@c51g2000cwc.googlegroups.com>

On Mar 10, 3:33 pm, Brian Blais <bbl... at bryant.edu> wrote:
> Hello,
>
> I was wondering what the approximate minimum age to learn python is.
<SNIP>>
>
> I wanted to hear responses from people who have experience teaching programming in
> elementary/middle (or even high) school.  Do graphical languages make a big
> difference?  Do text-based languages put up barriers to young learners?  Is it no big
> deal either way?
>
>                 thanks,
>
>                         Brian Blais

My two year old son is well on the way to becoming a great
programmer ;-)
He is learning to use the mouse and can navigate his way through the
menus to
the games and songs he likes when left on the cbeebies home page at
http://www.bbc.co.uk/cbeebies/ and is currently trying to get
coordinated
enough to play a tobogganing game.
Teaching method used was to spend too much time yourself on the laptop
with
son in lap watching Hi-5 or a Wombles video, on screen-2.

Currently Dominic and I are potty training. After that we'll start on
decorators and maybe weakref.

- Paddy.




From richard.leland at gmail.com  Tue Mar  6 23:08:11 2007
From: richard.leland at gmail.com (leland)
Date: 6 Mar 2007 20:08:11 -0800
Subject: re-point mod_python - is it possible?
Message-ID: <1173240491.770637.27440@t69g2000cwt.googlegroups.com>

i've upgraded my RHEL3 box to run python 2.3. problem is, mod_python
still points to the old python 2.2. is there any way to tell
mod_python that i've got a new version of python installed, and
to use that version now?

any help would be great - thanks!



From cping at dso.org.sg  Mon Mar 12 23:31:53 2007
From: cping at dso.org.sg (Jeremy)
Date: Tue, 13 Mar 2007 11:31:53 +0800
Subject: Error 14 on OS Call
Message-ID: <et56j9$sd4$1@nobel.pacific.net.sg>

Hi,

I recently started using Python and am working on Python 2.3.6 on Redhat. I
have developed a fat C++ extension for it and have the following problem:

The main module is in the Python code which gets a packet pk of string type
from the extension. It then passes pk to an IP tunnel using
os.write(self.tun_fd,pk).

Sometimes there is a crash at the os.write() call with the message 'OSError:
[Errno 14] Bad address'. When I check the integrity of references tun_fd and
pk by copying them just before write(), there seems to be no problem, so it
looks to me that os or the function reference to write() is bad.

I guess this may be due to a pointer problem in the C++ code. I have been
trying several ways of debugging this problem, but have yet to succeed.

One way I have been trying is to use Purify on Python. However, this leads 
to a segmentation fault in rtlib.o when running make install on the 
instrumented Python code.

Reagrds,
Jeremy






From adam at atlas.st  Sat Mar 17 18:47:57 2007
From: adam at atlas.st (Adam Atlas)
Date: 17 Mar 2007 15:47:57 -0700
Subject: [ANN] squisher 0.3
Message-ID: <1174171677.061035.94200@l77g2000hsb.googlegroups.com>

http://cheeseshop.python.org/pypi/squisher/0.3

I've posted the third version of my experimental packaging program
Squisher. Squisher can take a directory representing a Python package
(i.e. a directory with __init__.py) and "squish" it into a single .pyc
file that you can import, or run on the command line, just like any
other .py/.pyc file.

The hook is that it can be thus imported *without* necessarily having
Squisher itself installed. All you do is run Squisher on a directory
(or an existing zip file if you wish), and you get a single file you
can import with any normal Python installation.

It is complementary to Eggs in a way. They're good for having packages
globally installed and keeping them up-to-date, but very often you may
want the simple convenience of dropping a .pyc in a directory and
importing it. Furthermore, since Squished packages are just zip files
with a special Python bytecode header (and Eggs are just zipfiles with
internal metadata added), you can actually run it on an Egg and get a
file that can be used as an Egg *or* a Squished package just by
renaming it.

Try it out... I've found it useful so far. It is still pretty
experimental, so I wouldn't advise using it as a serious packaging
mechanism yet, but I hope that with time it will become very stable
and complete. Bug reports/patches welcome.

--

Changelog for anyone who tried the previous releases:
- Added a couple of patches courtesy of Gary Duzan -- a Python 2.3
compatibility fix, and a fix for importing compiled modules when
running a .pyc from the command line.
- Changed from GPL to BSD license. Also clarified that the generated
bytecode is considered public domain.
- It now detects if you pass it an already-squished module -- if so,
it will simply update the bytecode header if necessary.



From bert.heymans at gmail.com  Mon Mar 12 04:49:20 2007
From: bert.heymans at gmail.com (Bert Heymans)
Date: 12 Mar 2007 01:49:20 -0700
Subject: New to Python
In-Reply-To: <mailman.4956.1173688843.32031.python-list@python.org>
References: <mailman.4956.1173688843.32031.python-list@python.org>
Message-ID: <1173689360.138935.6780@j27g2000cwj.googlegroups.com>

On Mar 12, 3:02 am, Alberto Vieira Ferreira Monteiro
<albm... at centroin.com.br> wrote:
> Hi, I am new to Python, how stupid can be the questions I ask?
>
> For example, how can I add (mathematically) two tuples?
> x = (1,2)
> y = (3,4)
> How can I get z = (1 + 3, 2 + 4) ?
>
> Alberto Monteiro


Alberto -

List comprehesion, no doubt about it:
>>> z = [k+p for k,p in (x, y)]
>>> z
[3, 7]

- Bert



From http  Mon Mar  5 22:03:31 2007
From: http (Paul Rubin)
Date: 05 Mar 2007 19:03:31 -0800
Subject: Is every number in a list in a range?
References: <mailman.4693.1173129006.32031.python-list@python.org>
	<7xk5xvgo55.fsf@ruckus.brouhaha.com>
	<1173149481.694255.23350@n33g2000cwc.googlegroups.com>
Message-ID: <7x7itvt6nw.fsf@ruckus.brouhaha.com>

"MonkeeSage" <MonkeeSage at gmail.com> writes:
> > This genexp is better than a loop because it bails out immediately
> > if it finds an out-of-range x.
> 
> That's true: assuming that input is sequential. But if it's farily
> random (e.g., [10, 20, 12, 46, 202, 5, 102]), then you need a loop/
> list comp. to check each index.


Maybe I didn't undrestand the question.  Say maxnum is 30 in your
example above.  Then as soon as 46 is seen, you can stop checking, I
thought.


From jgodoy at gmail.com  Tue Mar  6 06:53:58 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Tue, 06 Mar 2007 08:53:58 -0300
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<45ec933a$0$15549$426a34cc@news.free.fr>
	<1huivd7.7l18eh1paqp0aN%aleax@mac.com>
Message-ID: <87k5xu37vt.fsf@gmail.com>

aleax at mac.com (Alex Martelli) writes:

> Bruno Desthuilliers <bdesth.quelquechose at free.quelquepart.fr> wrote:
>
>> >>I don't reload...  When my investigative tests gets bigger I write a script
>> >>and run it with the interpreter.  It is easy since my text editor can call
>> >>Python on a buffer (I use Emacs).
>> >  
>> > That's interesting, is this workflow pretty universal in the Python
>> > world?
>> 
>> I don't know, but that's also mostly how I do work.
>
> My favorite way of working: add a test (or a limited set of tests) for
> the new or changed feature, run it, check that it fails, change the
> code, rerun the test, check that the test now runs, rerun all tests to
> see that nothing broke, add and run more tests to make sure the new code
> is excellently covered, rinse, repeat.  Occasionally, to ensure the code
> stays clean, stop to refactor, rerunning tests as I go.

I believe this is a distinct case.  When we write tests we're worried with the
system itself.  When using the interactive interpreter we're worried with how
to best use the language.  There might be some feature of the system related
to that investigation, but there might be not.  For example: "what are the
methods provided by this object?" or "which approach is faster for this loop?"

I won't write a test case to test loop speed.  But I'd poke with the
interpreter and if the environment gets a bit big to setup then I'd go to the
text editor as I said. 


-- 
Jorge Godoy      <jgodoy at gmail.com>


From jgodoy at gmail.com  Sun Mar 25 13:51:58 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 25 Mar 2007 14:51:58 -0300
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
References: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>
Message-ID: <874po95hz5.fsf@gmail.com>

mark at agtechnical.co.uk writes:

> Hi All,
>
> Apologies for the newbie question but I've searched and tried all
> sorts for a few days and I'm pulling my hair out ;[
>
> I have a 'reference' HTML file and a 'test' HTML file from which I
> need to pull 10 strings, all of which are contained within <h2> tags,
> e.g.:
> <h2 class=r><a href="http://www.someplace.com/">Go Someplace</a></h2>
>
> Once I've found the 10 I'd like to write them to another 'results'
> html file. Perhaps a 'reference results' and a 'test results' file.
>>From where I would then like to 'diff' the results to see if they
> match.
>
> Here's the rub: I cannot find a way to pull those 10 strings so I can
> save them to the results pages.
> Can anyone please suggest how this can be done?
>
> I've tried allsorts but I've been learning Python for 1 week and just
> don't know enough to mod example scripts it seems. don't even get me
> started on python docs.. ayaa ;] Please feel free to teach me to suck
> eggs because it's all new to me :)
>
> Thanks in advance,
>
> Mark.


Take a look at BeautifulSoup.  It is easy to use and works well with some
malformed HTML that you might find ahead.

-- 
Jorge Godoy      <jgodoy at gmail.com>


From exarkun at divmod.com  Sun Mar 25 07:04:32 2007
From: exarkun at divmod.com (Jean-Paul Calderone)
Date: Sun, 25 Mar 2007 06:04:32 -0500
Subject: Strange behavior when printing a returned closure function
In-Reply-To: <1174820392.652008.123550@y80g2000hsf.googlegroups.com>
Message-ID: <20070325110432.18920.1678056949.divmod.quotient.5521@ohm>



On 25 Mar 2007 03:59:52 -0700, dartsch at dicad.de wrote:
>Hello,
>
>when I execute the following code (python 2.5)
>
>def f(x):
>    def g():
>        return x
>    return g
>
>print f(1)
>print f(2)
>
>I get an output like
>
><function g at 0x00AFC1F0>
><function g at 0x00AFC1F0>
>
>So according to print I get the same function object returned at both
>calls.
>That's surprising, I would expect to get two distinct function objects
>because their func_closure attribute has to be different. And indeed,
>if I do
>
>print f(1) is f(2)
>
>instead, it prints False. Even more confusing, if I do
>
>g1 = f(1)
>g2 = f(2)
>print g1
>print g2
>
>I get something like
>
><function g at 0x00AFC1B0>
><function g at 0x00AFC1F0>
>
>ie. two distinct function objects are printed.
>
>What's happening here?
>Some clever optimization reusing function objects in special cases or
>what ...?

They're _not_ the same function object, just like the `is' test told you.
They just happen to have been allocated at the same memory address.

Jean-Paul


From tbrkic at yahoo.com  Thu Mar 29 10:48:36 2007
From: tbrkic at yahoo.com (glomde)
Date: 29 Mar 2007 07:48:36 -0700
Subject: Why doesnt __getattr__ with decorator dont call __get_method in
	decorator
In-Reply-To: <1175102335.949034.43900@e65g2000hsc.googlegroups.com>
References: <1175092095.669194.255270@e65g2000hsc.googlegroups.com>
	<1hvodh5.h5rkrahq0el8N%aleax@mac.com>
	<1175102335.949034.43900@e65g2000hsc.googlegroups.com>
Message-ID: <1175179714.694588.139180@e65g2000hsc.googlegroups.com>


> To get python to run the __get__ method I think you have to call
> __getattr__ explicitly:
> a.__getattr__('test')
>
> If you do:
> a.test
> python follows a different routine: it checks for the existence of the
> attribute, then check if there is a __getattr__ attribute. Now the
> speculative bit: then I conjecture that python assumes that
> __getattr__ is a function with two arguments and directly passes them
> on to it.  Indeed
>
> type(a).__dict__['__getattr__'](a, 'test')
>
> seems to produce the same errors as a.test, whether the instance
> attribute is set or not.
> And this explain why there are too many arguments (error message
> above).
>
> --
> Arnaud

So is this a python bug? I assumed it was seen as function but dont
understand why it is like this. But interesting that if you call
__getattr__ explicitly it works.

Intuitevely I would assumet that the same route should be followed
in both case.

Maybe it is because __getattr__ is called only when you have an
exception.

/T







From kyosohma at gmail.com  Tue Mar 20 14:51:12 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 20 Mar 2007 11:51:12 -0700
Subject: Imports
In-Reply-To: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
Message-ID: <1174416672.629041.122320@l77g2000hsb.googlegroups.com>

On Mar 20, 1:31 pm, "gtb" <goodTweetieB... at hotmail.com> wrote:
> I am working with a tool called maxQ that generates jython scripts.
> The tool runs in
>
> C:\maxq\bin.
>
> Rather than clutter up bin I want to put the scripts and other .py
> scripts in
>
> c:\maxq\bin\testScripts.
>
> When doing so the scripts need to import from
>
> c:\maxq\jython, but can't find the modules.
>
> I tried adding c:\maxq\jython to the environment variable pythonpath
> but to no avail. Perhaps I missed it in Rossum's tutorial but is there
> a std prgrammatic way to specify a module directory?
>
> Could you, would you, recommend a text or another webpage for learning
> more (much more) about python?
>
> Thanx,
>
> gtb

I typically just import sys and then do a
sys.path.append(directoryPath). This basically makes whatever modules
in that path available at run time. If you need a beginners reference
book, I recommend "Beginning Python" by Hetland. "Python Programming
for the Absolute Beginner" by Dawson was a lot of fun, but he doesn't
get into the internals of the language like Hetland does. Once you're
a snake charmer too, you can "graduate" to the "Programming Python"
book by Lutz.

Mike



From chris.lasher at gmail.com  Fri Mar 23 11:26:29 2007
From: chris.lasher at gmail.com (Chris Lasher)
Date: 23 Mar 2007 08:26:29 -0700
Subject: How to list current line in pdb?
Message-ID: <1174663589.717404.169520@n76g2000hsh.googlegroups.com>

Hi all,

Using the pdb shell, after repeatedly entering 'l' (lowercase 'L'),
how do I jump back to listing the current line again if I don't
remember exactly what line my current line is? Do I just have to list
an early line in the code and repeatedly list from there until I see
the '->' indicating the current line?

Thanks,
Chris



From nicogrubert at gmail.com  Thu Mar 22 04:54:32 2007
From: nicogrubert at gmail.com (Nico Grubert)
Date: Thu, 22 Mar 2007 09:54:32 +0100
Subject: How to use unix_md5_crypt from Perl in Python?
Message-ID: <46024448.2080109@gmail.com>

Dear list members,

I have a Perl script which crypts a password using a clearteaxt password 
and a username.

Example:
   username = 'root at localhost'
   password = 'root'

The crypted password is: 'roK20XGbWEsSM'

The crypted password always starts with the first 2 characters of the 
username (here: 'ro' from 'root at localhost').

The Perl script contains this code and I am wondering how I can do this 
in Python:
#################################################################################
my $CryptedPw = '';
# md5 pw
if ($Self->{ConfigObject}->Get('AuthModule::DB::CryptType') &&
     $Self->{ConfigObject}->Get('AuthModule::DB::CryptType') eq 'md5') {
     $CryptedPw = unix_md5_crypt($Pw, $Param{UserLogin});
}
# crypt pw
else {
     # crypt given pw (unfortunately there is a mod_perl2 bug
     # on RH8 - check if
     # crypt() is working correctly) :-/
     if (crypt('root', 'root at localhost') eq 'roK20XGbWEsSM') {
         $CryptedPw = crypt($Pw, $Param{UserLogin});
     }
     else {
         $Self->{LogObject}->Log(
             Priority => 'notice',
             Message => "The crypt() of your mod_perl(2) is not working 
correctly! Update mod_perl!",
         );
         my $TempUser = quotemeta($Param{UserLogin});
         my $TempPw = quotemeta($Pw);
         my $CMD = "perl -e \"print crypt('$TempPw', '$TempUser');\"";
         open (IO, " $CMD | ") || print STDERR "Can't open $CMD: $!";
         while (<IO>) {
             $CryptedPw .= $_;
         }
         close (IO);
         chomp $CryptedPw;
     }
}
#################################################################################


What do I have to do in Python to create the crypted password 
'roK20XGbWEsSM' by using 'root at localhost' for username and 'root' for 
password?

I tried:
 >>> username = 'root at localhost'
 >>> password = 'root'
 >>> import crypt
 >>> crypt.crypt(username, password)
'roowueH.vq6VM'
 >>>

This creates 'roowueH.vq6VM' but not 'roK20XGbWEsSM'. :-(

Thanks in advance,
Nico


From steven.bethard at gmail.com  Sun Mar 25 10:44:34 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sun, 25 Mar 2007 08:44:34 -0600
Subject: Pattern for foo tool <-> API <-> shell|GUI
In-Reply-To: <mailman.5567.1174779389.32031.python-list@python.org>
References: <mailman.5552.1174753928.32031.python-list@python.org>	<1174758918.211398.182560@l75g2000hse.googlegroups.com>
	<mailman.5567.1174779389.32031.python-list@python.org>
Message-ID: <HuKdnW2Jh6ROF5vbnZ2dnUVZ_oOknZ2d@comcast.com>

Anastasios Hatzis wrote:
> I'm working on a tool which is totally command-line based and consisting of 
> multiple scripts. The user can execute a Python script in the shell, this 
> script does some basic verification before delegating a call into my tool's 
> package and depending on some arguments and options provided in the 
> command-line, e.g.
>     $python generate.py myproject --force --verbose
> the tool processes whatever necessary. There are multiple command handlers 
> available in this package which are responsible for different tasks and 
> depending of the script that has been executed one or more of these command 
> handlers are fired to do their work ;)

Side note: you might find argparse (http://argparse.python-hosting.com/) 
makes this a bit easier if you have positional arguments or sub-commands::

     >>> parser = argparse.ArgumentParser()
     >>> parser.add_argument('name')
     >>> parser.add_argument('--force', action='store_true')
     >>> parser.add_argument('--verbose', action='store_true')
     >>> parser.parse_args(['my_project', '--force', '--verbose'])
     Namespace(force=True, name='my_project', verbose=True)

     >>> parser = argparse.ArgumentParser()
     >>> subparsers = parser.add_subparsers()
     >>> cmd1_parser = subparsers.add_parser('cmd1')
     >>> cmd1_parser.add_argument('--foo')
     >>> cmd2_parser = subparsers.add_parser('cmd2')
     >>> cmd2_parser.add_argument('bar')
     >>> parser.parse_args(['cmd1', '--foo', 'X'])
     Namespace(foo='X')
     >>> parser.parse_args(['cmd2', 'Y'])
     Namespace(bar='Y')

> And I don't think that this is very trivial (at least not for my programming 
> skill level). In the given example "generate.py" (above) the following 
> scenario is pretty likely:
> 
> (1) User works with UML tool and clicks in some dialog a "generate" button
> (2) UML tool triggers this event an calls a magic generate() method of my tool 
> (via the API I provide for this purpose), like my generate.py script would do 
> same way
> (3) Somewhen with-in this generate process my tool may need to get some 
> information from the user in order to continue (it is in the nature of the 
> features that I can't avoid this need of interaction in any case).

So you're imagining an API something like::

     def generate(name,
                  force=False,
                  verbose=False,
                  handler=command_line_handler):
         ...
         choice = handler.prompt_user(question_text, user_choices)
         ...

where the command-line handler might look something like::

     class CommandLineHandler(object):
         ...
         def prompt_user(self, question_text, user_choices):
             while True:
                 choice = raw_input(question_text)
                 if choice in user_choices:
                     return choice
                 print 'invalid choice, choose from %s' % choices

and the GUI client would implement the equivalent thing with dialogs? 
That seems basically reasonable to me, though you should be clear in the 
documentation of generate() -- and any other methods that accept handler 
objects -- exactly what methods the handler must provide.

You also may find that "prompt_user" is a bit too generic -- e.g. a file 
chooser dialog looks a lot different from a color chooser dialog -- so 
you may need to split this up into "prompt_user_file", 
"prompt_user_color", etc. so that handler's don't have to introspect the 
question text to know what to do...

STeVe


From email at christoph-haas.de  Fri Mar 16 16:47:28 2007
From: email at christoph-haas.de (Christoph Haas)
Date: Fri, 16 Mar 2007 21:47:28 +0100
Subject: Sharing Objects in Python
In-Reply-To: <701552.85861.qm@web37215.mail.mud.yahoo.com>
References: <701552.85861.qm@web37215.mail.mud.yahoo.com>
Message-ID: <200703162147.30258.email@christoph-haas.de>

On Friday 16 March 2007 12:41, Clement wrote:
> Can a object sharable by two different python programs... If so can you
> please explain... because my project needs two programs to access nearly
> 45GB file Symentaniously...

What kind of information is that? Can you put it into a database?

 Christoph


From gagsl-py2 at yahoo.com.ar  Thu Mar  8 20:47:54 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 22:47:54 -0300
Subject: How to check whether file is open or not
References: <1173245313.037991.89380@s48g2000cws.googlegroups.com>
	<1173363042.058736.194420@n33g2000cwc.googlegroups.com>
Message-ID: <op.towe940vx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 11:10:42 -0300, Bart Ogryczak <B.Ogryczak at gmail.com>  
escribi?:

> On Mar 7, 6:28 am, "Ros" <pyalb... at gmail.com> wrote:
>> There are 10 files in the folder. I wish to process all the files one
>> by one. But if the files are open or some processing is going on them
>> then I do not want to disturb that process. In that case I would
>> ignore processing that particular file and move to next file.
>
> If you can os.open() with O_EXLOCK flag, it's not open by other
> process. Now that should work on Unix, Linux and MacOS X. All Windows
> proceeding form NT line, are supposed to be POSIX compatible, but
> somehow this flag is not available.

O_EXLOCK is not in POSIX.

-- 
Gabriel Genellina



From http  Wed Mar 14 03:08:38 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 23:08:38 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net> <45f76346.0@entanet>
	<1173843736.982126.211530@l77g2000hsb.googlegroups.com>
	<pan.2007.03.14.07.02.32.652175@REMOVEME.cybersource.com.au>
Message-ID: <7xabygti89.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVEME.cybersource.com.au> writes:
> > It should be possible to enumerate all sets of five numbers which sum
> > to 50 and randomly select one of them.
> 
> Of course it's possible. It's also a very inefficient way of doing so. For
> five numbers between 1 and 50, there are 50**5 = 312,500,000 possible sets
> to enumerate. 

No there are only 2611 such sets and generating them takes about 0.5
seconds on my laptop.  I posted the code for this elsewhere in the thread.


From gagsl-py2 at yahoo.com.ar  Mon Mar 26 08:49:13 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Mon, 26 Mar 2007 09:49:13 -0300
Subject: A better webpage filter
References: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl> <87ps6x2c07.fsf@pobox.com>
	<eu82dm$j48$2@news6.zwoll1.ov.home.nl>
Message-ID: <op.tpsq8bl5x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Mon, 26 Mar 2007 06:06:00 -0300, Anton Vredegoor  
<anton.vredegoor at gmail.com> escribi?:

> Thanks, I will look into it sometime. Essentially my problem has been
> solved by switching to opera, but old habits die hard and I find myself
> using Mozilla and my little script more often than would be logical.
>
> Maybe the idea of having a *Python* script open at all times to which
> all content goes through is just too tempting. I mean if there's some
> possible irritation on a site theoretically I could just write a
> specific function to get rid of it. This mental setting works as a

If you don't mind using JavaScript instead of Python, UserJS is for you:  
http://www.opera.com/support/tutorials/userjs/

-- 
Gabriel Genellina



From gagsl-py2 at yahoo.com.ar  Mon Mar  5 23:55:54 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 06 Mar 2007 01:55:54 -0300
Subject: Python Source Code Beautifier
References: <rgr7u2901ups77u0gjubavj21c88hhpt1p@4ax.com>
	<1172621660.110666.178550@z35g2000cwz.googlegroups.com>
	<1t6jbjm9iv1ps$.9xz6wbyehtul.dlg@40tude.net>
	<1172700549.583792.41660@s48g2000cws.googlegroups.com>
	<rbx67z1e3s62$.864g0l9r8ed.dlg@40tude.net>
	<45E8FADB.7000902@cosc.canterbury.ac.nz>
	<1rgq149m7oern$.1080aifmn5qo8$.dlg@40tude.net>
Message-ID: <op.toq3zgqpx6zn5v@gabriel2.softlabbsas.com.ar>

En Mon, 05 Mar 2007 07:07:57 -0300, Alan Franzoni  
<alan.franzoni_invalid at geemail.invalid> escribi?:

> Il Sat, 03 Mar 2007 17:34:35 +1300, greg ha scritto:
>
>> This was all discussed at *very* great length many
>> years ago, and the addition of in-place operators
>> to the language was held up for a long time until
>> the present compromise was devised. You might not
>> like it, but it's here to stay.
>
> Sure. I'm not a great programmer and I never thought about asking for  
> such a removal. I'm sure that there're people smarter and more  
> experienced than me out there designing Python, I'm glad I got it and I  
> won't use such
> shortcuts on mutable objects in my own programs.

The problem is that other people -not necesarily "smarter and more  
experienced" than you- may use those features, and perhaps you have to  
read, understand and modify some code written by someone else.
So, you should at least know what "a += b" means, even if you are not  
going to use it.

-- 
Gabriel Genellina



From stanc at al.com.au  Tue Mar 13 01:42:02 2007
From: stanc at al.com.au (Astan Chee)
Date: Tue, 13 Mar 2007 16:42:02 +1100
Subject: converting epoch time to string (and vice versa)
Message-ID: <45F639AA.1040209@al.com.au>

Hi,
I have a string in this format "DD/MM/YYY" for example:
tdate = "18/01/1990"
and Im trying to convert this to epoch time, can anyone help?
Im also trying to convert that epoch time to the string format 
previously. Can anyone help this one too?
Thanks!
Astan


From sjmachin at lexicon.net  Wed Mar 21 06:07:36 2007
From: sjmachin at lexicon.net (John Machin)
Date: 21 Mar 2007 03:07:36 -0700
Subject: Unicode in Excel files
In-Reply-To: <mailman.5361.1174437437.32031.python-list@python.org>
References: <1174430100.666040.43970@l77g2000hsb.googlegroups.com>
	<mailman.5357.1174433396.32031.python-list@python.org>
	<1174434442.142511.37240@p15g2000hsd.googlegroups.com>
	<mailman.5361.1174437437.32031.python-list@python.org>
Message-ID: <1174471656.165471.54680@e1g2000hsg.googlegroups.com>

On Mar 21, 11:37 am, Carsten Haese <cars... at uniqsys.com> wrote:
> On Tue, 2007-03-20 at 16:47 -0700, Gerry wrote:
> > I'm still mystified why:
> >    qno was ever unicode,
>
> Thus quoth http://www.lexicon.net/sjmachin/xlrd.html "This module
> presents all text strings as Python unicode objects."
>

And why would that be? As the next sentence in the referenced docs
says, "From Excel 97 onwards, text in Excel spreadsheets has been
stored as Unicode."

Gerry, your "Q1" string was converted to Unicode when you wrote it
using pyExcelerator's Worksheet.write() method.

HTH,
John





From apoliveiraleite at gmail.com  Mon Mar 19 16:08:38 2007
From: apoliveiraleite at gmail.com (Ana Paula Leite)
Date: Mon, 19 Mar 2007 13:08:38 -0700
Subject: urgent - Matplolib with IDLE!
Message-ID: <26f4c9e60703191308j55287087ydc12c24656b4df6b@mail.gmail.com>

Dear all,

I've just started using Matplotlib and I'm trying to make it work in IDLE.

Other people have reported the same problem as I'll refer, but I've tried
some solutions that I found in the web and I haven't succeded. Every time I
produce a figure, I can't get the IDLE prompt active again after closing
that figure.

I've tried the following:

- in site-pachages/matplotlib/backends/backend_tkagg.py I've uncommented the
line #os.environ['PYTHONINSPECT'] = '1'

- I've changed to the interactive mode, i.e I've set interactive=True in
share/matplotlib/.matplotlibrc

- I've started IDLE with the -n flag

I would sincerely appreciate your help, because I must finish some work very
very soon and I'm going crazy with this issue...
By the way, I'm using
- windows XP
- matplotlib-0.90.0.win32-py2.5
- numpy-1.0.1.win32-py2.5
- python 2.5

Te
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From aleax at mac.com  Wed Mar 28 01:08:34 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 27 Mar 2007 22:08:34 -0700
Subject: Can't use class variable with private nested class
References: <1175057276.163869.12850@y66g2000hsf.googlegroups.com>
Message-ID: <1hvnmot.1tmqpcq173vcowN%aleax@mac.com>

<tron.thomas at verizon.net> wrote:
   ...
> class Outer:
>       class Inner:
>               printOnce = True
> 
>               def __init__(self):
>                       if Outer.Inner.printOnce:
>                               print 'Printing once.'
>                               Outer.Inner.printOnce = False
> 
>       def __init__(self):
>               first = Outer.Inner()
>               second = Outer.Inner()
> 
> outer = Outer()
> 
> 
> However the following code, which has a private nested class, does not
> work:
> class Public:
>       class __Private:
>               printOnce = True
> 
>               def __init__(self):
>                       print 'Creating a __Private instance'
>                       if Public.__Private.printOnce:

When, anywhere "immediately inside" a class named X, you use a name
__foo starting with two underscores, that name is mangled to _X__foo.
Here, you're inside class __Private, so the mangling of __Private is to
_Private__Private (I'd actually have expected more stray underscores
hither and thither, but that's the gist of it).

>                               print 'Printing once.'
>                               Public.__Private.printOnce = False
> 
>       def __init__(self):
>               print 'Creating a Public instance'
>               first = Public.__Private()
>               second = Public.__Private()
> 
> public = Public()
> 
> Attempting to run the code will produce this error:
> AttributeError: class Public has no attribute '_Private__Private'
> 
> What can be done so that this private nested class can have the same
> functionality as the public nested class?

Forget all the naming silliness and use self.__class__.printOnce
instead.


Alex


From __peter__ at web.de  Tue Mar 20 09:59:26 2007
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 Mar 2007 14:59:26 +0100
Subject: How to copy a ClassObject?
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
	<Xns98F993D63F87Dmosornet@161.53.160.64>
Message-ID: <etop7s$kkd$03$1@news.t-online.com>

Karlo Lozovina wrote:

> Yes, I can do a:
> ??class?tmp(First):
> ??????pass
> 
> but I'd rather make a copy than a subclass.

> tmp = new.classobj('tmp', (First,), {})

That line creates a subclass just as the simpler approach you gave above.

Peter




From gagsl-py2 at yahoo.com.ar  Sun Mar 11 09:37:06 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 10:37:06 -0300
Subject: Parsing Indented Text (like parsing Python)
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<000a01c763c0$6863a560$2102fea9@Guides.local>
	<op.to0tfybfx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<008f01c763de$9a1a4190$0702a8c0@Guides.local>
Message-ID: <op.to01f4bvx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 11 Mar 2007 10:09:57 -0300, Mike Schinkel <mikeschinkel at gmail.com>  
escribi?:

> The problem is, how do I figure out how many spaces represent a tab? In

You can't, unless you have more context.

> one
> case, someone could have their editor configured to allow tabs to use 3
> spaces and the user could intermingle tabs and spaces. In other cases, a
> user might have their editor configured to have a tab equal 8 spaces yet
> also intermingle tabs and spaces. When a human looks at the document it  
> is
> obvious the setting but how can I make it obvious to my program?

"it is obvious the setting?"
How do you infer that? From other properties of the document, semantics?
Just from the content, and the number of tabs and spaces, you can't get  
anything.

> I could force the user to specify tabwidth at the top of the file, but  
> I'd
> rather not. And since Python doesn't either, I know it is possible to  
> write
> a parser to do this. I just don't know how.

Python simply assumes 8 spaces per tab.
If your Python source ONLY uses tabs, or ONLY spaces, it doesn't matter.  
If you mix tabs+spaces, Python simple replaces each tab by 8 spaces. If  
you edited that using 4 spaces, Python will get it wrong. That's why all  
people always say "never mix tabs and spaces"

If you know "somehow" that a certain block -using tabs- has the same  
indentation that another block -using spaces- you could infer the number  
of spaces per tab.

-- 
Gabriel Genellina



From _karlo_ at _mosor.net_  Tue Mar 20 09:31:59 2007
From: _karlo_ at _mosor.net_ (Karlo Lozovina)
Date: Tue, 20 Mar 2007 13:31:59 +0000 (UTC)
Subject: How to copy a ClassObject?
References: <Xns98F98FEF2B9A6mosornet@161.53.160.64>
Message-ID: <Xns98F993D63F87Dmosornet@161.53.160.64>

Karlo Lozovina <_karlo_ at _mosor.net_> wrote in
news:Xns98F98FEF2B9A6mosornet at 161.53.160.64: 

> how would one make a copy of a class object? Let's say I have:
>   class First:
>     name = 'First'
> 
> And then I write:
>   tmp = First

Silly me, posted a question without Googling first ;>. This seems to be 
the answer to my question:

import new
class First:
    name = 'First'
tmp = new.classobj('tmp', (First,), {})

After this, tmp is a copy of First, and modifying tmp.name will not affect 
First.name.

P.S.
If my code is somehow mistaken and might not function properly in all 
cases, please correct me. 

Bye,
klm.

-- 
 _______                                        Karlo Lozovina - Mosor
|   |   |.-----.-----.     web: http://www.mosor.net || ICQ#: 10667163
|       ||  _  |  _  |             Parce mihi domine quia Dalmata sum.
|__|_|__||_____|_____|


From grflanagan at yahoo.co.uk  Wed Mar 14 04:52:40 2007
From: grflanagan at yahoo.co.uk (Gerard Flanagan)
Date: 14 Mar 2007 01:52:40 -0700
Subject: How to capture environment state after running a shell script.
In-Reply-To: <1173812079.750152.289300@n33g2000cwc.googlegroups.com>
References: <1173790656.886985.65660@v33g2000cwv.googlegroups.com>
	<1173812079.750152.289300@n33g2000cwc.googlegroups.com>
Message-ID: <1173862360.881825.180180@o5g2000hsb.googlegroups.com>

On Mar 13, 7:54 pm, attn.steven.... at gmail.com wrote:
> On Mar 13, 5:57 am, "Gerard Flanagan" <grflana... at yahoo.co.uk> wrote:
>
> > Hello,
>
> > I have a third party shell script which updates multiple environment
> > values, and I want to investigate (and ultimately capture to python)
> > the environment state after the script has run.
>
> First close the input so that the (sub) process
> knows to terminate and flush the output.  Then,
> you can read from the output:
>
> import subprocess
> import popen2
>
> p = subprocess.Popen(["/bin/sh"], stdin=subprocess.PIPE,
>         stdout=subprocess.PIPE)
>
> p.stdin.write("env -i FOO=BAR\n")
> p.stdin.close()
> status = p.wait()
> ret = p.stdout.readlines()
> p.stdout.close()
>
>
> print ret
>

Perfect! Works a charm. Thanks for helping me out.

Gerard




From anton.vredegoor at gmail.com  Sat Mar 10 18:27:04 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sun, 11 Mar 2007 00:27:04 +0100
Subject: number generator
In-Reply-To: <mailman.4919.1173560418.32031.python-list@python.org>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><7x7itqqxlh.fsf@ruckus.brouhaha.com><1173453432.893222.308610@j27g2000cwj.googlegroups.com><pan.2007.03.09.15.32.01.112493@gmx.net><1173515984.515050.27400@n33g2000cwc.googlegroups.com>	<esukru$1v1$1@news2.zwoll1.ov.home.nl>
	<mailman.4919.1173560418.32031.python-list@python.org>
Message-ID: <esvepk$1cu$1@news3.zwoll1.ov.home.nl>

Terry Reedy wrote:

> Partitioning positive count m into n positive counts that sum to m is a 
> standard combinatorial problem at least 300 years old.  The number of such 
> partitions, P(m,n)  has no known exact formula but can be computed 
> inductively rather easily.  The partitions for m and n can be ranked in 
> lexicographic order from 0 to P(m,n)-1.  Given a rank r in that range, one 
> can calculate the particular partition that has that rank.  So a 
> equi-probable random count in the range can be turned into a equi-probable 
> random partition.

Yes that was one of my first ideas too. But later on Steven pointed out 
that one can view the problem like this:

00010000100010100

That would be [3,4,3,1,2]

where the '1' elements are like dividing shutters that partition the row 
of '0'. This means that the problem is reduced to permutations (albeit 
unique permutations) which are a lot simpler to compute than partitions.

Ok I'll admit that I succeeded in translating my 'Goldberg' solution to 
this case, I can't expect anyone to dust off and read 4 year old threads 
anyway :-)

(by the way I'm still convinced that this code can be simplified a lot)

def starters(L):
     n,np,R = len(L),1,range(len(L))
     bf = [L[:i].count(L[i]) for i in R]
     for i in R: np = np*(n-i)/(bf[i]+1)
     return [(i,np*L[i:].count(L[i])/n) for i in R if not bf[i]]

def perm(index,L):
     remain,n = index,len(L)
     res,T = L[:],L[:]
     for i in range(n):
         for j,k in starters(T):
             if remain-k < 0:
                 res[i] = T.pop(j)
                 break
             remain -= k
     return res

def nperm(L):
     return reduce(lambda a,b:a+b,[k for j,k in starters(L)])

def bb(i,bricks,bins):
     L = [1] * (bins-1) + [0] * (bins-1)
     R = [1]
     for x in perm(i,L):
         if x:  R.append(1)
         else: R[-1]+=1
     return R

def test():
     bricks,bins =  7, 4
     L = [1] * (bins-1) + [0] * (bins-1)
     for i in range(nperm(L)):
         print bb(i,bricks,bins)

if __name__=='__main__':
     test()


> This topic is section 3.1 in Combinatorial Algorithms: Generation, 
> Enumeration, and Search by Kreher and Stinson.  The authors reference 
> several other books as their sources.

Great book!

> I plan to someday rewrite many of their pseudocode algorithms in Python.

That would be my dream job. If only I understood more of them. But I'm 
slowly making progress in other areas so that one day I will maybe 
reread the book and also understand the second half.

A.


From quentel.pierre at wanadoo.fr  Sat Mar 31 17:51:27 2007
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: 31 Mar 2007 14:51:27 -0700
Subject: help with dates
In-Reply-To: <1175376312.927559.10380@n76g2000hsh.googlegroups.com>
References: <1175376312.927559.10380@n76g2000hsh.googlegroups.com>
Message-ID: <1175377887.398372.246570@o5g2000hsb.googlegroups.com>

> Four groups of firefighters (group1, group2, group3, group4). Each
> group works a 24 hr shift. So group1 works April 1, group2 works April
> 2, group3 works April 3, group4 works April 4, group 1 works April 5,
> etc. It just keeps rolling like this forever into next year, etc.
>
> I need to come up with a methodology for the following:
>
> If given a date, find out what group is working on that date.
>
Hello,

You can use method datetime.date.toordinal() :

from datetime import date
start = date(2007,4,1) # Arpil 1, 2007

def group(_date):
    return (date.toordinal(_date)-date.toordinal(start)) % 4

print group(date(2007,4,15))

Regards,
Pierre



From gagsl-py2 at yahoo.com.ar  Sat Mar 17 05:53:22 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 17 Mar 2007 06:53:22 -0300
Subject: TypeError: 'module' object is not callable
References: <1174066969.563803.216040@p15g2000hsd.googlegroups.com>
Message-ID: <op.tpbf8wm5x6zn5v@gabriel2>

En Fri, 16 Mar 2007 14:42:49 -0300, <randomtalk at gmail.com> escribi?:

> and i tried to call profile('t.printworld()')
>
> but i received the following error:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: 'module' object is not callable

It's always better to post the *whole* code.
I assume you wrote:
import profile
profile('...')
But profile is the module name; you want to call the `run` function inside  
the profile module instead:

import profile
profile.run('t.printworld()')

Look at the docs for the profile module at  
http://docs.python.org/lib/lib.html or typing help(profile) at the  
interpreter prompt.

-- 
Gabriel Genellina



From jura.grozni at gmail.com  Thu Mar  1 10:50:03 2007
From: jura.grozni at gmail.com (azrael)
Date: 1 Mar 2007 07:50:03 -0800
Subject: imagemagick
In-Reply-To: <mailman.4575.1172761565.32031.python-list@python.org>
References: <1172759286.009577.89600@30g2000cwc.googlegroups.com>
	<mailman.4575.1172761565.32031.python-list@python.org>
Message-ID: <1172764203.789823.93650@s48g2000cws.googlegroups.com>

i need to use some common filters lik the edge, blur. it was pretty
easy and fast to use python magick. but now as I want to use it with
python, it is impossible. there is the PIL_usm, but also no
installation instrucions.
Is there a way to blur the image using the PIL by a specific radius.



On Mar 1, 4:12 pm, Terry Hancock <hanc... at anansispaceworks.com> wrote:
> azrael wrote:
> > Hy
> > did anyone manage to work with imahemagick through python. I've been
> > googling like a crazy for some instalation instructions, but i cant
> > find anything. please help.
>
> There have been a few wrappers for ImageMagick over the last few years.
>
> There was once something called "PythonMagick", for example. However
> AFAIK, they are all currently defunct. There was a later version using
> Boost, but it apparently required a lot of system resources to compile
> for some reason, and I don't think I was able to.
>
> Apparently ImageMagick has gone through a lot of API changes and people
> get disgusted with supporting it (?). There is also, of course the
> Python Imaging Library (PIL) that competes with it pretty effectively
> for most use cases (of course ImageMagick has unparalleled image
> conversion support).
>
> If you really want ImageMagick, though, you might want to consider
> writing your own wrapper (perhaps using ctypes, now that it is included
> in the standard library).
>
> I have used 'popen' to run it as a separate process in the past. The
> 'subprocess' module would be the smart way to do that today, and that
> might be your fastest solution.
>
> Cheers,
> Terry
>
> --
> Terry Hancock (hanc... at AnansiSpaceworks.com)
> Anansi Spaceworkshttp://www.AnansiSpaceworks.com




From karajitsu at yahoo.com.ph  Thu Mar  1 20:20:29 2007
From: karajitsu at yahoo.com.ph (karajitsu at yahoo.com.ph)
Date: 1 Mar 2007 17:20:29 -0800
Subject: World Ultimate Fighting
Message-ID: <1172798429.027675.73910@p10g2000cwp.googlegroups.com>



you can find it here the World Ultimate Fighting at

    http://www.dirtyfighting.blogspot.com



From gagsl-py2 at yahoo.com.ar  Tue Mar 13 14:27:08 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 13 Mar 2007 15:27:08 -0300
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>
	<55fbgjF2492skU1@mid.individual.net>
	<1173573654.009953.266280@30g2000cwc.googlegroups.com>
	<7xbqj01u9c.fsf@ruckus.brouhaha.com>
	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>
	<01f501c7653e$1ee8cee0$03000080@hendrik>
Message-ID: <op.to437igfx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 13 Mar 2007 03:20:49 -0300, Hendrik van Rooyen  
<mail at microcorp.co.za> escribi?:

> Is it possible to devise a test that can distinguish between sets
> of:
>
> - five random numbers that add to 50, and
> - four random numbers and a fudge number that add to 50?
>
> My stats are way too small and rusty to attempt to answer
> the question, but it seems intuitively a very difficult thing.

You can't have two different sets with four equal numbers - it's not a  
very difficult thing, it's impossible to distinguish because they're  
identical!
Given 4 numbers in the set, the 5th is uniquely determined. By example:  
12, 3, 10, 18 *must* end with 7. The 5th number is not "random". Any  
randomness analysis should include only the first 4 numbers (or any other  
set of 4).
In other words, there are only 4 degrees of freedom. In the fence analogy,  
you only have to choose where to place 4 poles; the 5th is fixed at the  
end.

-- 
Gabriel Genellina



From B.Ogryczak at gmail.com  Thu Mar  1 05:33:23 2007
From: B.Ogryczak at gmail.com (Bart Ogryczak)
Date: 1 Mar 2007 02:33:23 -0800
Subject: finding out the precision of floats
In-Reply-To: <1172698199.219016.57710@v33g2000cwv.googlegroups.com>
References: <1172401072.607179.241290@q2g2000cwa.googlegroups.com>
	<1172402444.935723.192200@m58g2000cwm.googlegroups.com>
	<1172405198.187516.276310@h3g2000cwc.googlegroups.com>
	<1172410271.154309.49700@j27g2000cwj.googlegroups.com>
	<1172412661.998318.109180@s48g2000cws.googlegroups.com>
	<mailman.4453.1172579820.32031.python-list@python.org>
	<1172585380.631673.257410@q2g2000cwa.googlegroups.com>
	<1172602729.777210.23070@a75g2000cwd.googlegroups.com>
	<1172662682.590738.301630@k78g2000cwa.googlegroups.com>
	<1172674419.411077.4210@t69g2000cwt.googlegroups.com>
	<1172683149.885750.323640@j27g2000cwj.googlegroups.com>
	<1172698199.219016.57710@v33g2000cwv.googlegroups.com>
Message-ID: <1172745203.824496.208840@h3g2000cwc.googlegroups.com>

On Feb 28, 10:29 pm, "John Machin" <sjmac... at lexicon.net> wrote:
> On Mar 1, 4:19 am, "BartOgryczak" <B.Ogryc... at gmail.com> wrote:
>
>
>
> > On Feb 28, 3:53 pm, "John Machin" <sjmac... at lexicon.net> wrote:
>
> > > On Feb 28, 10:38 pm, "BartOgryczak" <B.Ogryc... at gmail.com> wrote:
>
> > > > [1] eg. consider calculating interests rate, which often is defined as
> > > > math.pow(anualRate,days/365.0).
>
> > > More importantly, the formula you give is dead wrong. The correct
> > > formula for converting an annual rate of interest to the rate of
> > > interest to be used for n days (on the basis of 365 days per year) is:
>
> > > (1 + annual_rate) ** (n / 365.0) - 1.0
> > > or
> > > math.pow(1 + annual_rate, n / 365.0) - 1.0
> > > if you prefer.
>
> > YPB? Anyone with half a brain knows, that you can either express rate
> > as 0.07 and do all those ridiculous conversions above, or express it
> > as 1.07 and apply it directly.
>
> A conversion involving an exponentiation is necessary. "All those"?? I
> see only two.
>
> Please re-read your original post, and note that there are *TWO* plus-
> or-minus 1.0 differences between your formula and mine. For an annual
> rate of 10%, yours would calculate the rate for 6 months (expressed as
> 182.5 days) as:
> math.pow(0.10, 0.5) = 0.316... i.e. 31.6%

You're assuming that I'd store annual rate as 0.1, while actually it'd
stored as 1.1.
Which is logical and applicable directly.








From vel.accel at gmail.com  Wed Mar 28 05:24:22 2007
From: vel.accel at gmail.com (D.Hering)
Date: 28 Mar 2007 02:24:22 -0700
Subject: PyDoc -g call to Alt-Installed Python
In-Reply-To: <eud4b9$cdp$03$1@news.t-online.com>
References: <1175045954.295216.105830@d57g2000hsg.googlegroups.com>
	<eud4b9$cdp$03$1@news.t-online.com>
Message-ID: <1175073862.357219.48420@n76g2000hsh.googlegroups.com>

On Mar 28, 3:09 am, Peter Otten <__pete... at web.de> wrote:
> D.Hering wrote:
> > I have both python2.4 and 2.5 installed on a (k)ubuntu linux box. I'm
> > trying to get the call to pydoc -g (pydoc server called from the
> > system console) to recognize python2.5 rather than the system's
> > default 2.4 release.
>
> > I've tried several different things so far, to no avail. My console
> > scripting knowledge, so far, is minimal. Any help here is appreciated.
>
> Copy Tools/scripts/pydoc from the Python2.5 source distribution into ~/bin.
> Then change its first line from
>
> #!/usr/bin/env python
>
> to
>
> #!/usr/bin/env python2.5
>
> Peter

Thanks Pete



From gnewsg at gmail.com  Mon Mar  5 08:48:13 2007
From: gnewsg at gmail.com (billiejoex)
Date: 5 Mar 2007 05:48:13 -0800
Subject: ANN: pyftpdlib 0.1 released
Message-ID: <1173102493.146282.307490@30g2000cwc.googlegroups.com>

Hi all,
I'm proud to announce the first beta release of pyftpdlib available at
the following urls:

home: http://billiejoex.altervista.org/pyftpdlib.html
google code: http://code.google.com/p/pyftpdlib/

About
=====

pyftpdlib is an high-level FTP server library based on asyncore/
asychat frameworks.
pyftpdlib is actually the most complete RFC959 FTP server
implementation available for Python language.

Requirements
==========

Python 2.2 or higher

Bug reports / Contacts
================

billiejoex -_[AT]_- gmail (dot) com



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 22:15:45 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 09 Mar 2007 00:15:45 -0300
Subject: list of dictionary in embedded Python
References: <ACCA22ED08500745AE88FEDED5B6F2EA02BC0B4F@exchange.wvs>
Message-ID: <op.towjcjt7x6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 08 Mar 2007 22:26:59 -0300, ZiZi Zhao <zzhao at laika.com> escribi?:

> I tried to build a list of dictionaries using embedded Python2.5
> in the following way to append dictionaries to a list.
>
> Py_Object *pList = PyList_New(0);
>
> for (i=0; i<MAXSIZE; i++) {
>     Py_Object *pDict = PyDict_New();
>     //
>     // build this dictionary of keys & values
>     //
>     if (pDict != NULL) {
>         if (PyList_Append(pList, pDict) < 0) {
>             printf ("Failed to append new dict to dict-list\n");
>         }
>         Py_DECREF(pDict);
>     }
> }
>
> In this way, I found the PyList_Append only appends the pointer
> of pDict to pList.

All Python objects are seen as pointers on C code.

> After Py_DECREF(pDict) and going back to,
> Py_Object *pDict = PyDict_New();
> for next run in loop, it gets the same pointer as last time,

Perhaps (in the non-posted block) there is a Py_INCREF missing, and that  
last Py_DECREF destroys the object.
(You don't see the printf message, I presume)

> which finally makes all dictionaries in the list are the same
> as the last one. (BTW, in Python, the result is correct.)
> Now, I have to do no Py_DECREF(pDict) in the loop, but do once at
> the end, when the loop is finished, like

You could check using sys.getrefcount; if all of them say 2 (including the  
last dict) you know the list holds the only reference to them. (And all  
id() should be different, too).

Maybe this code is useful; builds a list of empty dictionaries. (Note that  
I *know* the list is empty and has the right size, so I can use  
PyList_SET_ITEM instead of the non-macro version PyList_SetItem or the  
insert/append variants).


/*
  flistdict - fast list of dictionaries
  flistdict(size) -> [{},{},...] = [{} for _ in range(size)]
  Devuelve una lista de diccionarios vac?os (todos diferentes)
*/
static PyObject *
flistdict(PyObject *self, PyObject *args)
{
     int i, size;
     PyObject *result=NULL, *dict=NULL;

     if (!PyArg_ParseTuple(args, "i", &size))
         return NULL;
     result = PyList_New(size);
     if (result==NULL)
         goto error;
     for (i=0; i<size; i++) {
         dict = PyDict_New();
         if (dict==NULL)
              goto error;
         PyList_SET_ITEM(result, i, dict);
     }
     goto normalexit;

error:
     Py_XDECREF(result);
     result = NULL;

normalexit:
     return result;
}

-- 
Gabriel Genellina



From ptmcg at austin.rr.com  Sun Mar 25 02:30:50 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 24 Mar 2007 23:30:50 -0700
Subject: Anyone know of a MICR parser algorithm written in Python?
In-Reply-To: <1174780369.721874.250280@e65g2000hsc.googlegroups.com>
References: <1174763132.786644.161500@y66g2000hsf.googlegroups.com>
	<1174776923.618895.232630@y80g2000hsf.googlegroups.com>
	<1174780369.721874.250280@e65g2000hsc.googlegroups.com>
Message-ID: <1174804250.210573.262890@p15g2000hsd.googlegroups.com>

On Mar 24, 6:52 pm, "mkppk" <barnaclej... at gmail.com> wrote:
>
> Its just that I would rather not reinvent the wheel (or read old C
> code)..
>
Wouldn't we all!

Here is the basic structure of a pyparsing solution.  The parsing part
isn't so bad - the real problem is the awful ParseONUS routine in C.
Plus things are awkward since the C program parses right-to-left and
then reverses all of the found fields, and the parser I wrote works
left-to-right.  Still, this grammar does most of the job.  I've left
out my port of ParseONUS since it is *so* ugly, and not really part of
the pyparsing example.

-- Paul

from pyparsing import *

# define values for optional fields
NoAmountGiven  = ""
NoEPCGiven     = ""
NoAuxOnusGiven = ""

# define delimiters
DOLLAR = Suppress("$")
T_ = Suppress("T")
A_ = Suppress("A")

# field definitions
amt = DOLLAR + Word(nums,exact=10) + DOLLAR
onus = Word("0123456789A- ")
transit = T_ + Word("0123456789-") + T_
epc = oneOf( list(nums) )
aux_onus = A_ + Word("0123456789- ") + A_

# validation parse action
def validateTransitNumber(t):
    transit = t[0]
    flds = transit.split("-")
    if len(flds) > 2:
        raise ParseException(0, "too many dashes in transit number",
0)
    if len(flds) == 2:
        if len(flds[0]) not in (3,4):
            raise ParseException(0, "invalid dash position in transit
number", 0)
    else:
        # compute checksum
        ti = map(int,transit)
        ti.reverse() # original algorithm worked with reversed data
        cksum = 3*(ti[8]+ti[5]+ti[2]) + 7*(ti[7]+ti[4]+ti[1]) +
ti[6]+ti[3]+ti[0]
        if cksum%10 != 0:
            raise ParseException(0, "transit number failed checksum",
0)
    return transit

# define overall MICR format, with results names
micrdata =
Optional(aux_onus,default=NoAuxOnusGiven).setResultsName("aux_onus") +
\
            Optional(epc,default=NoEPCGiven).setResultsName("epc") +\
 
transit.setParseAction(validateTransitNumber).setResultsName("transit")
+ \
            onus.setResultsName("onus") + \
            Optional(amt,default=NoAmountGiven).setResultsName("amt")
+ \
            stringEnd

import re

def parseONUS(tokens):
    tokens["csn"] = ""
    tokens["tpc"] = ""
    tokens["account"] = ""
    tokens["amt"] = tokens["amt"][0]
    onus = tokens.onus
    # remainder omitted out of respect for newsreaders...
    # suffice to say that unspeakable acts are performed on
    # onus and aux_onus fields to extract account and
    # check numbers

micrdata.setParseAction(parseONUS)

testdata = file("checks.csv").readlines()[1:]
tests = [(flds[1],flds) for flds in map(lambda
l:l.split(","),testdata)]
def verifyResults(res,csv):
    def match(x,y):
        print (x==y and "_" or "X"),x,"=",y

 
Ex,MICR,Bank,Stat,Amt,AS,TPC,TS,CSN,CS,ACCT,AS,EPC,ES,ONUS,OS,AUX,AS,Tran,TS
= csv
    match(res.amt,Amt)
    match(res.account,ACCT)
    match(res.csn,CSN)
    match(res.onus,ONUS)
    match(res.tpc,TPC)
    match(res.epc,EPC)
    match(res.transit,Tran)

for t,data in tests:
    print t
    try:
        res = micrdata.parseString(t)
        print res.dump()
        if not(data[0] == "No"):
            print "Passed expression that should have failed"
        verifyResults(res,data)
    except ParseException,pe:
        print "<parse failed> %s" % pe.msg
        if not(data[0] == "Yes"):
            print "Failed expression that should have passed"
    print



From paul.sijben at xs4all.nl  Wed Mar  7 05:11:50 2007
From: paul.sijben at xs4all.nl (Paul Sijben)
Date: Wed, 07 Mar 2007 11:11:50 +0100
Subject: audio video streaming communications
In-Reply-To: <mailman.2399.1168202934.32031.python-list@python.org>
References: <mailman.2399.1168202934.32031.python-list@python.org>
Message-ID: <45EE8FE6.7030508@xs4all.nl>

Hi Ken,

I am looking for something similar. I can do the communications myself
but need to be able to select a video feed, capture it and also need to
display it through wxPython.

Trawled the web and even tried to hire coders to create it for me. So
far I have been having no luck.

I did learn that fastaudio is a good way to bluescreen a WinXP box ;-)

Have you found something?

Paul

Ken Seehart wrote:
> Hello,
> 
> I am looking for a good audio/video conferencing library.  Ideally it
> should work with wxPython (or have some means of making it work there).
> 
> So far my main difficulty in my attempt at searching for such a package
> is that there is so much stuff out there on downloading music and videos.
> 
> I am not interested in download torrents, etc.  I'm just looking video
> conferencing, and live video broadcasts, etc.
> 
> Any recommendations?
> 
> Thanks,
> - Ken
> 
> 


From tommy.nordgren at comhem.se  Wed Mar 21 14:55:46 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Wed, 21 Mar 2007 19:55:46 +0100
Subject: parsing combination strings
In-Reply-To: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
Message-ID: <7671D917-FAF3-43F4-AF2E-79BDDEBF8BCD@comhem.se>


On 21 mar 2007, at 19.42, PKKR wrote:

> I need a fast and efficient way to parse a combination string(digits +
> chars)
>
> ex: s = "12ABA" or "1ACD" or "123CSD" etc
>
> I want to parse the the above string such that i can grab only the
> first digits and ignore the rest of the chacters,
>
> so if i have s = "12ABA" , parser(s) should give me "12" or "1" or
> "123".
>
> I can think of a quick dirty way by checking each element in the
> string and do a 'str.isdigit()' and stop once its not a digit, but
> appreciate any eligent way.
	You need to look up regular expressions in the Documentation.
A regular expression that matches only at the start of the string is  
appropriate
for this problem.

------------------------------------------------------
"Home is not where you are born, but where your heart finds peace" -
Tommy Nordgren, "The dying old crone"
tommy.nordgren at comhem.se




From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sat Mar 10 20:39:14 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 02:39:14 +0100
Subject: How to test if a key in a dictionary exists?
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
Message-ID: <55h4u2F258g2nU1@mid.individual.net>

Frank wrote:

> does anyone know how one can test if, e.g., a dictionary 'name'
> has a key called 'name_key'?

Yes. It's already posted; next time have a look at the concise
library reference:

http://docs.python.org/lib/typesmapping.html
 
> This would be possible:
> 
> keys_of_names = names.keys()
> L = len(keys_of_names)
> 
> for i in range(L):
> if keys_of_names[i] == name_key:
> print 'found'

Coming in from Java? 8)

Iterating through something using len(X) is quite rare in Python. 

If we had no simple "key in dict" test, I'd write the above as:

for key in names.keys():
    if key == name_key:
        print "found"
        break
else:
    print "not found"

(It would even suffice to write "for key in names".)
 
Regards,


Bj?rn

-- 
BOFH excuse #331:

those damn raccoons!



From manstey at csu.edu.au  Wed Mar  7 19:06:31 2007
From: manstey at csu.edu.au (manstey)
Date: 7 Mar 2007 16:06:31 -0800
Subject: is it possible to give an instance a value?
In-Reply-To: <mailman.4753.1173281501.32031.python-list@python.org>
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
	<pan.2007.03.07.03.21.21.381410@REMOVEME.cybersource.com.au>
	<mailman.4753.1173281501.32031.python-list@python.org>
Message-ID: <1173312391.084413.247550@30g2000cwc.googlegroups.com>

Thanks everyone for your replies. The language is Cache Object Script,
a language used in  Intersystems Relational Dbase.

I think egbert's answer provides the simplest answer. It allows our
python interface to Cache to be almost identical to Cache Object
Script, with simeply the addition of (), which we prefer to .val
or .data for various reasons.

Using the example .type was a mistake, as I meant simply any metadata
about a value. If we make the instance callable, then we can have:

instance()
instance.calculated
instance.type
instance.whatever
instance.save()
etc

thanks.



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Mon Mar 19 05:09:09 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Mon, 19 Mar 2007 10:09:09 +0100
Subject: Private data
In-Reply-To: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
Message-ID: <45fe5335$0$14570$426a74cc@news.free.fr>

Dustan a ?crit :
> http://dustangroups.googlepages.com/privateattributesinpython
> 
> This is something that I just threw together this morning, after a
> eureka moment. It's a way of creating private class attributes

What for ? We already have one: prefix 'private' names with a single 
underscore.

> and
> static function variables (I'm not 100% sure if that's the correct
> terminology, but you get what I mean).

def somefunc(param, _statics={}):
   # code here


> I haven't tried to create
> private instance attributes, mainly because it would just be too
> difficult, 

Same recipe as above : single leading underscore.

> and it would be awful syntax. I'm not considering actually
> using this, but I do have a couple questions about it.
> 
> 1. Has anyone else ever come up with something like this? I can't
> imagine I'm the only person who's ever thought of this.

With something like trying to forcefit access restriction in Python ? 
Nope, you're not the first one here. I've not seen anyone using such a 
thing in any of the projects I've worked on/with yet.



From nagle at animats.com  Thu Mar  8 01:13:15 2007
From: nagle at animats.com (John Nagle)
Date: Thu, 08 Mar 2007 06:13:15 GMT
Subject: merits of Lisp vs Python
In-Reply-To: <7xhcsws35x.fsf@ruckus.brouhaha.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
Message-ID: <%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>

Paul Rubin wrote:
> Brian Adkins <lojicdotcomNOSPAM at gmail.com> writes:
> 
>>With prices of dedicated servers and virtual private servers so cheap,
>>why would anyone get a hosting account without root access? 
> 
> Because it turns you into a sysadmin instead of letting specialists
> handle all the OS stuff so you can concentrate on your application.

    Exactly.  I want to outsource these headaches to someone who's
doing it for a thousand servers and has a standardized "just works"
configuration that's Python-friendly.  It's inefficient to work
through all these issues for a single server.  I have better things
to do with my time.

    When starting out with this project, I'd made the assumption that
Python was a stable, working, well-supported technology, like Perl
hosting.  It isn't.

    It's really amazing how stable Perl hosting is.  I have a site,
"downside.com", that's been running a Perl application since 2000,
with essentially no attention since 2002.  It's been migrated to new
servers twice by the hosting provider, without my having had to change
anything.  Or even do anything.  It's talking to a MySQL database,
going out and retrieving files from the SEC, parsing complex documents,
gettting a feed from NASDAQ, responding to queries, and doing
quite a bit of work.  When developing that, I had no serious problems with Perl.

    Python, on the other hand, is uphill all the way.  Constant trouble
with version issues, especially with C components called from Python.
MySQLdb, M2Crypto, SSL - they all have platform/version
incompatibility problems.  I just spent three days making M2Crypto
work on a new Linux server with a different Red Hat version.
Neither Python's packaging tools nor the platform's packaging
tools deal adequately with these issues.

    The language is fine.  It's those weakly-supported packages out
there in the cold that are the problem.  (I definitely agree with
Guido that SWIG is a bad idea.  I've been combing through the 24,000
lines of C generated by SWIG for M2Crypto, figuring out the compile
errors and what caused them.  This is neither fun nor desirable.)

    I get the feeling that Python isn't used much for general web hosting
any more.  Only about two messages per month on this newsgroup mention
a hosting-related issue.

    One wonders how many people try and give up.

				John Nagle


From bbbart at inGen.be  Sun Mar  4 01:36:01 2007
From: bbbart at inGen.be (Bart Van Loon)
Date: Sun, 4 Mar 2007 11:36:01 +0500
Subject: portable Python ifconfig
References: <slrneujqni.6uk.bbbart@charles.inGen.islamabad>
	<1172971079.137861.316170@h3g2000cwc.googlegroups.com>
	<1172973137.492188.85100@s48g2000cws.googlegroups.com>
	<1172976237.808280.292150@j27g2000cwj.googlegroups.com>
Message-ID: <slrneukq6h.8vm.bbbart@charles.inGen.islamabad>

It was 3 Mar 2007 18:43:57 -0800, when MonkeeSage wrote:
> Bart,
>
> Can you try this and let us know if it works for FreeBSD?

thanks for you suggestions!

> import socket, fcntl, struct
>
> def _ifinfo(sock, addr, ifname):
>     iface = struct.pack('256s', ifname[:15])
>     info  = fcntl.ioctl(sock.fileno(), addr, iface)
>     if addr == 0x8927:
>         hwaddr = []
>         for char in info[18:24]:
>             hwaddr.append(hex(ord(char))[2:])
>         return ':'.join(hwaddr)
>     else:
>         return socket.inet_ntoa(info[20:24])
>
> def ifconfig(ifname):
>     ifreq = {'ifname': ifname}
>     sock  = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
>     try:
>         ifreq['addr']    = _ifinfo(sock, 0x8915, ifname) # SIOCGIFADDR
>         ifreq['brdaddr'] = _ifinfo(sock, 0x8919, ifname) #
> SIOCGIFBRDADDR
>         ifreq['netmask'] = _ifinfo(sock, 0x891b, ifname) #
> SIOCGIFNETMASK
>         ifreq['hwaddr']  = _ifinfo(sock, 0x8927, ifname) #
> SIOCSIFHWADDR
>     except:
>         pass
>     sock.close()
>     return ifreq

apparenlty, it doesn't. :-(

I changes the except block into

    except Exception, e:
        print e

and added

if __name__ == '__main__':
     print ifconfig('ng0')
     print ifconfig('vr0')
     print ifconfig('vr2')
     print ifconfig('xl0')

ng0 exists and has an IP (virtual interface created by mpd)
vr0 exists but does not have an IP (phisical interface for mpd)
vr2 exists and has an IP configured
xl0 does not exist

output:

[Errno 25] Inappropriate ioctl for device
{'ifname': 'ng0'}
[Errno 25] Inappropriate ioctl for device
{'ifname': 'vr0'}
[Errno 25] Inappropriate ioctl for device
{'ifname': 'vr2'}
[Errno 25] Inappropriate ioctl for device
{'ifname': 'xl0'}

however, in Linux I get the following results:

[Errno 99] Cannot assign requested address
{'ifname': 'eth0'}
{'hwaddr': '0:17:f2:4c:a5:c', 'ifname': 'ath0', 'netmask': '255.255.255.0', 'addr': '192.168.50.104', 'brdaddr': '192.168.50.255'}
{'hwaddr': '0:0:0:0:0:0', 'ifname': 'tun0', 'netmask': '255.255.255.255', 'addr': '192.168.3.6', 'brdaddr': '0.0.0.0'}
[Errno 19] No such device
{'ifname': 'wielewoele'}

which seems 100% correct.

-- 
regards,
BBBart

   Susie: You'd get a good grade without doing any work.  
   Calvin: So?  
   Susie: It's wrong to get rewards you haven't earned.  
   Calvin: I've never heard of anyone who couldn't live with that.


From tiedon_jano at hotmail.com  Tue Mar  6 08:14:30 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Tue, 06 Mar 2007 13:14:30 GMT
Subject: Good handling of input data (was Re: Newbie question)
In-Reply-To: <mailman.4709.1173178667.32031.python-list@python.org>
References: <mailman.4684.1173113802.32031.python-list@python.org>	<45EC579A.8090602@websafe.com>
	<mailman.4709.1173178667.32031.python-list@python.org>
Message-ID: <WOdHh.130$c62.86@read3.inet.fi>

Tommy Grav kirjoitti:
> <snip>
 > Thanks for the great response.
> 
> So how would you handle this type of error handling?
> My main problem is that occasionally there is an entry
> in the list that is a string:
> 
> 0.9834 134.4933 78.009 run11 27
> 
> Again I would like to avoid having to individually parse the 3 floats,
> while still easily handling the string, but a list comprehension will
> not work as far as I can tell. Is there a module that handles this
> type of flat ascii tables? Something like:
> 
> (x,y,z,id,n) = ParseFile("float","float","float","string","int")
> 
> would be great, and I guess
> 
> (x,y,z,id,n) = PaseFile2("%f %f %f %s %d")
> 
> would be even better.
> 
> Cheers
>   Tommy
> 
> 
> 

Being just on the first step of the ladder of total clairvoyance, I 
can't disambiguate the word "occasionally". I'm assuming that you have 
two types of rows: the ones with 3 floats and the ones with 3 floats, a 
string and an integer.

Here's a possible solution:

#=======================================
conv = {'f':float, 'i':int, 's':str}
lines = ['0.3434  0.5322 0.3345\n',
          '0.9834 134.4933 78.009 run11 27\n',
          '1.3435  2.3345 5.3433\n']
for line in lines:
    line = line.split()
    if len(line) == 3:
        pat = 'fff'
        (x, y, z) = [conv[p](x) for p,x in zip(pat, line)]
        print x, y, z
        print type(x), type(y), type(z)
    else:
        pat = 'fffsi'
        (x, y, z, s, i) = [conv[p](x) for p,x in zip(pat, line)]
        print x, y, z, s, i
        print type(x), type(y), type(z), type(s), type(i)
#=======================================


HTH,
Jussi


From bbxx789_05ss at yahoo.com  Fri Mar 16 18:05:44 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 15:05:44 -0700
Subject: Executing a list of functions
In-Reply-To: <1174082346.152681.152970@o5g2000hsb.googlegroups.com>
References: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
	<1174082346.152681.152970@o5g2000hsb.googlegroups.com>
Message-ID: <1174082744.410790.193160@l75g2000hse.googlegroups.com>

On Mar 16, 3:59 pm, "7stud" <bbxx789_0... at yahoo.com> wrote:
> lst = [a, b]
>
> The () symbol causes the named function to execute, and a function
> call in the code is always replaced by the function's return value.

Try this:

------
def a():
        print "this is a"

def b():
        print "this is b"

lst = [a(), b()]
------

To create the list, the terms inside the list have to be evaluated.
That causes a and b to execute, and the function calls are replaced by
the each function's return value.  Since your functions don't have a
return statement, the value None is returned.  To see that, add this
line:

print lst




From lojicdotcomNOSPAM at gmail.com  Wed Mar  7 17:15:22 2007
From: lojicdotcomNOSPAM at gmail.com (Brian Adkins)
Date: Wed, 07 Mar 2007 17:15:22 -0500
Subject: merits of Lisp vs Python
In-Reply-To: <1165732072.056289.274460@79g2000cws.googlegroups.com>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
Message-ID: <XPGHh.1336$_a1.998@bignews7.bellsouth.net>

George Sakkis wrote:
> JShrager at gmail.com wrote:
> 
>> 1. Lisp is the only industrial strength language
>                       ^^^^^^^^^^^^^^^^^^^
> You keep using that phrase. I don't think it means what you think it
> means.

[Vizzini has just cut the rope The Dread Pirate Roberts is climbing up]
Vizzini: HE DIDN'T FALL? INCONCEIVABLE.
Inigo Montoya: You keep using that word. I do not think it means what 
you think it means.


From dudaraster at gmail.com  Sun Mar  4 09:43:31 2007
From: dudaraster at gmail.com (Aviroce)
Date: Sun, 04 Mar 2007 14:43:31 +0000
Subject: *** CANADIAN ANTI-TERROR LAW HAS BEEN STRUCK DOWN BY ITS
	HONORABLE SUPREME COURT UNANIMOUSLY *** (REPOST)
In-Reply-To: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
References: <1172334164.885851.200820@h3g2000cwc.googlegroups.com>
Message-ID: <repost.92104.1172691920.663009.111260@j27g2000cwj.googlegroups.com>

On Feb 24, 11:22 am, stj... at rock.com wrote:
> Canada anti-terror law is struck down>From the Associated Press
>
> February 24, 2007
>
> OTTAWA - Canada's Supreme Court on Friday unanimously declared it
> unconstitutional to detain foreign terrorism suspects indefinitely
> while the courts review their deportation orders.
>
> Five Arab Muslim men have been held for years under the "security
> certificate" program, which the Justice Department has said is a key
> tool in the fight against global terrorism and essential to Canada's
> security.
>
> The court found that the system violated the Charter of Rights and
> Freedoms, Canada's bill of rights. However, it suspended its ruling
> for a year to give Parliament time to rewrite the part of the
> Immigration and Refugee Protection Act that covers the certificate
> process.
>
> The security certificates were challenged by three men from Morocco,
> Syria and Algeria - all alleged by the Canadian Security Intelligence
> Service to have ties to terrorist networks.
>
> The men have spent years in jail while fighting deportation orders.
>
> They risk being labeled terrorists and sent back to their native
> countries, where they say they could face torture.
>
> The court said the treatment of the suspects was a violation of their
> rights.
>
> "The overarching principle of fundamental justice that applies here is
> this: Before the state can detain people for significant periods of
> time, it must accord them a fair judicial process," Chief Justice
> Beverley McLachlin wrote in a ruling for all nine justices.
>
> "The secrecy required by the scheme denies the person named in a
> certificate the opportunity to know the case put against him or her,
> and hence to challenge the government's case," she said.
>
> The challenged law allows sensitive intelligence to be heard behind
> closed doors by a federal judge, with only sketchy summaries given to
> defense attorneys.
>
> The court said the men and their lawyers should have a right to
> respond to the evidence used against them by intelligence agents.
>
> Stockwell Day, the minister of public safety, noted that because the
> ruling does not take effect for a year, the certificates would remain
> in place. He said the government would address the court's ruling "in
> a timely and decisive fashion."
>
> Two of the men are out on bail and remain under house arrest. Three
> others are being held in a federal facility in Ontario.

<<<<<<<<<<<"The court said the treatment of the suspects was a
violation of their
rights.


"The overarching principle of fundamental justice that applies here
is
this: Before the state can detain people for significant periods of
time, it must accord them a fair judicial process," Chief Justice
Beverley McLachlin wrote in a ruling for all nine justices.


"The secrecy required by the scheme denies the person named in a
certificate the opportunity to know the case put against him or her,
and hence to challenge the government's case," she said.
">>>>>>>>>>>>>>>>

THAT IS CALLED PROTECTING CIVIL RIGHTS.  IN THE UNITED STATES OF
AMERICA, WHERE CIVIL RIGHTS ARE PROTECTED BY LAW, FOREIGN SUSPECTS ARE
NOT PROTECTED BY THE GENEVA CONVENTION.  DR. EVIL, V.P. CHENEY, AND
MINI-ME, PRESIDENT BUSH, OPTED TO MODIFY THE GENEVA CONVENTION TO DENY
FOREIGN SUSPECTS DUE PROCESS DEMANDED BY THE CONVENTION.  THIS MEANS
ENEMIES OF THE UNITED STATES OF AMERICA WILL BE DOING JUST THAT TOO.
WHAT IS GOOD FOR THE GOOSE IS GOOD FOR GANDER.









From george.sakkis at gmail.com  Wed Mar  7 23:12:14 2007
From: george.sakkis at gmail.com (George Sakkis)
Date: 7 Mar 2007 20:12:14 -0800
Subject: Debugging segmentation faults
In-Reply-To: <7YFHh.5597$M65.1613@newssvr21.news.prodigy.net>
References: <1173294934.182507.116790@h3g2000cwc.googlegroups.com>
	<1173300944.602217.194030@j27g2000cwj.googlegroups.com>
	<7YFHh.5597$M65.1613@newssvr21.news.prodigy.net>
Message-ID: <1173327134.755144.175540@n33g2000cwc.googlegroups.com>

On Mar 7, 4:15 pm, John Nagle <n... at animats.com> wrote:

>     You're using Python on a web server to do something
> complicated.  You must suffer.
>
>     Are you trying to fork off a subprocess in a multithreaded
> program?  That's unlikely to work.  The sematics differ
> from OS to OS (Solaris forks all the threads, most other
> operating systems don't; most UNIX-based OSs copy all the
> open file descriptors, but some give you control of which
> open files are passed), and Python may not be thread-safe
> in that area.

I see the potential problem in general, but in my case every thread is
exclusively responsible for the subprocesses it forks; no subprocess
is inherited from the main thread or is shared in among the worker
threads.

George



From sgeiger at ncee.net  Wed Mar 14 09:52:00 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Wed, 14 Mar 2007 08:52:00 -0500
Subject: Mocking OpenOffice in python?
In-Reply-To: <1173880102.3459.26.camel@dot.uniqsys.com>
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
	<1173880102.3459.26.camel@dot.uniqsys.com>
Message-ID: <45F7FE00.7020900@ncee.net>

My take was that this is an effort to manipulate these files without the 
need for Open Office, so I replied as follows:

Open Office files (.ods and perhaps .odt) are just zipped or gzipped.  
Unpack that and then you are dealing with manipulating regular text 
files--probably HTML.                     


Carsten Haese wrote:
> On Wed, 2007-03-14 at 01:39 -0700, PaoloB wrote:
>   
>> Hi everyone,
>>
>> during our development, we need to write some unit tests that interact
>> with OpenOffice through pyUno.
>>
>> Is there anyone who has got any experience on it? As OpenOffice is
>> quite a large beast, and interaction is rather complex, I would like
>> to know if there is someone who is willing to share experience (and,
>> possibly, code).
>>     
>
> I have some experience with pyuno, but your question is very open-ended.
> It would be helpful if you asked specific questions or gave more
> background on what kind of interaction you're trying to achieve.
>
> The generic answer to your request for code examples is that there's a
> tutorial with example code at
> http://udk.openoffice.org/python/python-bridge.html, and then there's
> the API documentation at
> http://api.openoffice.org/DevelopersGuide/DevelopersGuide.html.
>
> -Carsten
>
>
>   

-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From deets at nospam.web.de  Tue Mar 13 18:05:50 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 Mar 2007 23:05:50 +0100
Subject: help!! *extra* tricky web page to extract data from...
In-Reply-To: <55ojorF26c25jU1@mid.uni-berlin.de>
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
Message-ID: <55oli1F25u2dmU1@mid.uni-berlin.de>

> It's an AJAX-site. You have to carefully analyze it and see what 
> actually happens in the javascript, then use that. Maybe something like 
> the http header plugin for firefox helps you there.


ups, obviously I wasn't looking enough at the site. Sorry for the confusion.

Still, some pages are AJAX, you won't be able to scrape them easily 
without analyzing the JS code.

Diez


From aleax at mac.com  Thu Mar 15 01:47:44 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 14 Mar 2007 22:47:44 -0700
Subject: Grep Equivalent for Python
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
Message-ID: <1huzlrm.1scmekr1val8sbN%aleax@mac.com>

tereglow <tom.rectenwald at eglow.net> wrote:
   ...
> server using the /proc FS.  For example, in order to obtain the amount
> of physical memory on the server, I would do the following in shell:
> 
> grep ^MemTotal /proc/meminfo | awk '{print $2}'

If you would indeed do that, maybe it's also worth learning something
more about the capabilities of your "existing" tools, since

  awk '/^MemTotal/ {print $2}' /proc/meminfo

is a more compact and faster way to perform exactly the same task.

(You already received a ton of good responses about doing this in
Python, but the "pipe grep into awk instead of USING awk properly in the
first place!" issue has been a pet peeve of mine for almost 30 years
now, and you know what they say about old dogs + new tricks!-).


Alex


From http  Sat Mar 10 11:29:09 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 08:29:09 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<DThIh.10892$tD2.3813@newsread1.news.pas.earthlink.net>
	<pan.2007.03.10.13.45.29.402878@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xr6rxkqp6.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> Doesn't mean that it isn't random. After all, the first four numbers are
> random, therefore their sum is random. 50 - (something random) is also
> random.

What does it mean for the first 4 numbers to be random?  For example,
is 27 random?

By your method, what is the probability of the first number being
higher than 30?  What is the probability of the fifth number being
higher than 30?  If these probabilities are unequal, can we really say
the sequences are random?


From ptmcg at austin.rr.com  Sat Mar 31 20:35:15 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 31 Mar 2007 17:35:15 -0700
Subject: Shed Skin Python-to-C++ Compiler 0.0.21, Help needed
In-Reply-To: <yfsirchf04z.fsf@oc.ex.ac.uk>
References: <mailman.5803.1175334924.32031.python-list@python.org>
	<576vhbF2ca1guU1@mid.individual.net>
	<1175376373.241744.6220@y80g2000hsf.googlegroups.com>
	<yfsirchf04z.fsf@oc.ex.ac.uk>
Message-ID: <1175387715.022063.171570@b75g2000hsg.googlegroups.com>

On Mar 31, 6:45 pm, Alexander Schmolck <a.schmo... at gmail.com> wrote:
> Regardless of its merrits, it's GPL'ed which I assume is an immediate turn-off
> for many in the community.
>

Why would that be?  GPL'ed code libraries can be a turn-off for those
who want to release commercial products using them, but a GPL'ed
utility such as a compiler bears no relationship or encumbrance on the
compiled object code it generates.

-- Paul



From rodin.alexander at gmail.com  Wed Mar 14 14:45:35 2007
From: rodin.alexander at gmail.com (inline)
Date: 14 Mar 2007 11:45:35 -0700
Subject: Constructor of object
In-Reply-To: <mailman.5097.1173895676.32031.python-list@python.org>
References: <1173894809.887357.165290@p15g2000hsd.googlegroups.com>
	<mailman.5097.1173895676.32031.python-list@python.org>
Message-ID: <1173897935.398404.288580@y66g2000hsf.googlegroups.com>

On Mar 14, 9:05 pm, Thinker <thin... at branda.to> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> inline wrote:
> > Hello! I want to assign self to object of parent class in
> > constructor, like
>
> > def my_func(): ... return ParentClass()
>
> > class MyClass (ParentClass): def __init__(self): self = my_func()
>
> > but it not work, because "object not initialized". What i can do?
>
> Do you want to call constructor of super-class to initialize the object?
> If it is true, you have following options.
>
> In old style class:
> class MyClass(ParentClass):
> def __init__(self):
> ParentClass.__init__(self)
>
> In new style class:
> class MyClass(ParentClass):
> def __init__(self):
> super(MyClass).__init__(self)
>
> Or
> class MyClass(ParentClass):
> def __init__(self):
> super(MyClass, self).__init__()
>
> - --
> Thinker Li - thin... at branda.to thinker... at gmail.comhttp://heaven.branda.to/~thinker/GinGin_CGI.py
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.6 (FreeBSD)
> Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
>
> iD8DBQFF+Dls1LDUVnWfY8gRAvDaAKDVmX8LmuWUdJ4eVil7l//rjCQZLQCg8dO8
> Y77CL1ikmtdl6S3HD04GWiA=
> =mvSe
> -----END PGP SIGNATURE-----

I know it, but i don't want call constructor of parent class - I use
PyGTK and want to load window from glade file and assign it to object,
parented gtk.Window:

#!/usr/bin/env python

import gtk
import gtk.glade

class HelloWindow (gtk.Window):
    def __init__(self):
        xml = gtk.glade.XML("hello.glade")
        xml.signal_autoconnect(self)
        self = xml.get_widget("window")

window = HelloWindow()
window.connect("delete_event", gtk.main_quit)
window.show_all()
gtk.main()



From Nomad.C at gmail.com  Mon Mar 26 13:13:04 2007
From: Nomad.C at gmail.com (Nomad.C at gmail.com)
Date: 26 Mar 2007 10:13:04 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <4607fbf4$1@nntp.zianet.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
Message-ID: <1174929184.645992.61310@y66g2000hsf.googlegroups.com>

On 26 Mar, 17:59, "Erik Johnson" <nob... at invalid.com> wrote:
> <Noma... at gmail.com> wrote in message
>
> news:1174915232.414568.197250 at p15g2000hsd.googlegroups.com...
>
> > OK...
> > I've been told that Both Fortran and Python are easy to read, and are
> > quite useful in creating scientific apps for the number crunching, but
> > then Python is a tad slower than Fortran because of its a high level
> > language nature, so what are the advantages of using Python for
> > creating number crunching apps over Fortran??
> > Thanks
> > Chris
>
>     So, after reading much of animated debate here, I think few would
> suggest that Python is going to be faster than FORTRAN when it comes to raw
> execution speed. Numeric and SciPy are Python modules that are geared
> towards numerical computing and can give substantial performance gians over
> plain Python.
>
>     A reasonable approach (which has already been hinted at here), is to try
> to have the best of both world by mixing Python and FORTRAN - doing most of
> the logic and support code in Python and writing the raw computing routines
> in FORTRAN. A reasonable approach might be to simply make your application
> work in Python, then use profiling to identify what parts are slowest and
> move those parts into a complied language such as FORTRAN or C if overall
> performance is not fast enough.  Unless your number crunching project is
> truly massive, you may find that Python is a lot faster than you thought and
> may be plenty fast enough on it's own.
>
>     So, there is a tradeoff of resources between development time, execution
> time, readability, understandability, maintainability, etc.
>
>     psyco is a module I haven't seen mentioned here - I don't know a lot
> about it, but have seen substantial increases in performance in what little
> I have used it. My understanding is that it produces multiple versions of
> functions tuned to particular data types, thus gaining some advantage over
> the default, untyped bytecode Python would normally produce. You can think
> of it as a JIT compiler for Python (but that's not quite what it is doing).
> The home page for that module is here:  http://psyco.sourceforge.net/
>
> Hope that help,
> -ej

Ok
Thanks you all for giving a little insight into what Python can
actually do, I think I've read enough to convince me that Python is
generally a very flexible, fast, powerful language that can be used in
a wide variety of applications instead of focusing on numerical
functions like fortran does.
Thanks again!



From openopt at ukr.net  Thu Mar 15 14:53:34 2007
From: openopt at ukr.net (dmitrey)
Date: 15 Mar 2007 11:53:34 -0700
Subject: right-format of integer output as text
In-Reply-To: <1173984339.188538.200880@l75g2000hse.googlegroups.com>
References: <1173984339.188538.200880@l75g2000hse.googlegroups.com>
Message-ID: <1173984814.270308.46060@y80g2000hsf.googlegroups.com>

There are some errors occured in displaing previous message, I meant
all right borders are the same, + some number of spaces before integer
numbers, according to the number of digits
D.



From tjreedy at udel.edu  Fri Mar  9 03:29:19 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 Mar 2007 03:29:19 -0500
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com><1165613280.584178.36470@16g2000cwy.googlegroups.com><1165627684.709241.86340@16g2000cwy.googlegroups.com><1165685950.758858.18960@n67g2000cwd.googlegroups.com><1165732072.056289.274460@79g2000cws.googlegroups.com><XPGHh.1336$_a1.998@bignews7.bellsouth.net><eCHHh.3014$tv6.280@newssvr19.news.prodigy.net><1173329966.266070.283130@8g2000cwh.googlegroups.com><7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<1huohy5.1273xi3mtqdc2N%aleax@mac.com>
Message-ID: <esr5su$e9t$1@sea.gmane.org>


"Alex Martelli" <aleax at mac.com> wrote in message 
news:1huohy5.1273xi3mtqdc2N%aleax at mac.com...
| later sold for mucho dinero) is an unabashed fan of Python; the "XO"
| (nee "One Laptop Per Child", OLPC, and once known as the "$100 laptop")
| uses Python as its preferred (only?-) application language, and it's
| slated to be the most widely distributed Python distro if it hits even
| half of its ambitious target-numbers...

The exciting part to me is that the somewhat inovative user inteface is 
writen in Python and intended to be hacked on by the users (kids) around 
the world.

tjr





From aleax at mac.com  Thu Mar 15 23:13:53 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 15 Mar 2007 20:13:53 -0700
Subject: Pickle Problem
References: <1173971633.305988.207530@d57g2000hsg.googlegroups.com>
	<mailman.5135.1173973120.32031.python-list@python.org>
Message-ID: <1hv19eg.1pr7aovjlztdzN%aleax@mac.com>

Gary Herron <gherron at islandtraining.com> wrote:
   ...
> fixed, I see another bit of trouble.   The pickle format is a binary 
> format (be default), but you don't open the file in binary mode.   On

Alas, wish it were:-(.

Unfortunately, snipping the right snippet from help(pickle) ...:

"""
     |      The optional protocol argument tells the pickler to use the
     |      given protocol; supported protocols are 0, 1, 2.  The
default
     |      protocol is 0, to be backwards compatible.  (Protocol 0 is
the
     |      only protocol that can be written to a file opened in text
     |      mode and read back successfully.  When using a protocol
higher
     |      than 0, make sure the file is opened in binary mode, both
when
     |      pickling and unpickling.)
     |      
     |      Protocol 1 is more efficient than protocol 0; protocol 2 is
     |      more efficient than protocol 1.
"""

So, by default, you're using the most inefficient protocol... but, you
can write it out to a file opened in text mode and read it back.


Alex


From bbxx789_05ss at yahoo.com  Fri Mar 16 18:40:19 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 16 Mar 2007 15:40:19 -0700
Subject: Python shell on mac os x
In-Reply-To: <1174035180.781564.25130@n59g2000hsh.googlegroups.com>
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
	<1hv1966.1poigs11f692njN%aleax@mac.com>
	<1174035180.781564.25130@n59g2000hsh.googlegroups.com>
Message-ID: <1174084819.330438.4980@n76g2000hsh.googlegroups.com>

On Mar 16, 2:53 am, martin.lal... at gmail.com wrote:
> or go tohttp://pythonmac.org/packages/
>  and you have python 2.5 or python 2.4.4 with readline support

The download instructions seem to steer Mac users to version 2.4.4
because it has more modules available. What is the consensus on that?



From psdasilvaX at esotericaX.ptX  Mon Mar 12 19:26:41 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Mon, 12 Mar 2007 23:26:41 +0000
Subject: Request for a change in the csv module.
Message-ID: <1173741982.944813@jubilee.claranet.pt>

Hi.

I have just seen that csv module, more exactly the Dialect class,
does not have any variable to specify the "floating point" character!
In portuguese this is ','. Not '.'. 3.1415 -> 3,1415.
I think this is also the case of other languages/countries.
If I am correct, i.e. if there is no such possibility, where can
I file a request for a csv change? Excel, for example, automatically
converts '.' to ',' and the separator from ',' to ';'.

Thanks.


From stefaan.himpe at gmail.com  Sun Mar 18 11:22:52 2007
From: stefaan.himpe at gmail.com (stefaan)
Date: 18 Mar 2007 08:22:52 -0700
Subject: XML based programming language
Message-ID: <1174231372.650216.271030@y66g2000hsf.googlegroups.com>

Hello,

I have recently had to deal with an XML-based
programming language. (The programs are
generated programmatically.)

XML leads to a "two-level" parsing problem: first
parse the xml into tokens, then parse the tokens
to grasp their meaning (based on the semantics
of the programming language).

Basically, I used elementtree as a sophisticated "lexer" and wrote a
recursive descent parser to perform the semantic analysis and
interpretation.
(It works great.)

But I keep wondering: do parser generator tools
exist that I could have used instead of writing
the recursive descent parser manually ?

Best regards,
Stefaan.



From vorticitywolfe at gmail.com  Sun Mar 18 18:19:32 2007
From: vorticitywolfe at gmail.com (vorticitywolfe at gmail.com)
Date: 18 Mar 2007 15:19:32 -0700
Subject: where function
Message-ID: <1174256372.038474.274140@n59g2000hsh.googlegroups.com>

Is there a function in Python analogous to the "where" function in
IDL?

x=[0,1,2,3,4,2,8,9]
print where(x=2)

output:
[2,5]



From ptmcg at austin.rr.com  Fri Mar 23 22:31:53 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 23 Mar 2007 19:31:53 -0700
Subject: On text processing
In-Reply-To: <mailman.5535.1174689003.32031.python-list@python.org>
References: <mailman.5535.1174689003.32031.python-list@python.org>
Message-ID: <1174703513.169508.148720@p15g2000hsd.googlegroups.com>

On Mar 23, 5:30 pm, "Daniel Nogradi" <nogr... at gmail.com> wrote:
> Hi list,
>
> I'm in a process of rewriting a bash/awk/sed script -- that grew to
> big -- in python. I can rewrite it in a simple line-by-line way but
> that results in ugly python code and I'm sure there is a simple
> pythonic way.
>
> The bash script processed text files of the form...
>
> Any elegant solution for this?

Is a parser overkill?  Here's how you might use pyparsing for this
problem.

I just wanted to show that pyparsing's returned results can be
structured as more than just lists of tokens.  Using pyparsing's Dict
class (or the dictOf helper that simplifies using Dict), you can
return results that can be accessed like a nested list, like a dict,
or like an instance with named attributes (see the last line of the
example).

You can adjust the syntax definition of keys and values to fit your
actual data, for instance, if the matrices are actually integers, then
define the matrixRow as:

matrixRow = Group( OneOrMore( Word(nums) ) ) + eol


-- Paul


from pyparsing import ParserElement, LineEnd, Word, alphas, alphanums,
\
        Group, ZeroOrMore, OneOrMore, Optional, dictOf

data = """key1    value1
key2    value2
key3    value3


key4    value4
spec11  spec12   spec13   spec14
spec21  spec22   spec23   spec24
spec31  spec32   spec33   spec34


key5    value5
key6    value6


key7    value7
more11   more12   more13
more21   more22   more23


key8    value8
"""

# retain significant newlines (pyparsing reads over whitespace by
default)
ParserElement.setDefaultWhitespaceChars(" \t")

eol = LineEnd().suppress()
elem = Word(alphas,alphanums)
key = elem
matrixRow = Group( elem + elem + OneOrMore(elem) ) + eol
matrix = Group( OneOrMore( matrixRow ) ) + eol
value = elem + eol + Optional( matrix ) + ZeroOrMore(eol)
parser = dictOf(key, value)

# parse the data
results = parser.parseString(data)

# access the results
# - like a dict
# - like a list
# - like an instance with keys for attributes
print results.keys()
print

for k in sorted(results.keys()):
    print k,
    if isinstance( results[k], basestring ):
        print results[k]
    else:
        print results[k][0]
        for row in results[k][1]:
            print "   "," ".join(row)
print

print results.key3


Prints out:
['key8', 'key3', 'key2', 'key1', 'key7', 'key6', 'key5', 'key4']

key1 value1
key2 value2
key3 value3
key4 value4
    spec11 spec12 spec13 spec14
    spec21 spec22 spec23 spec24
    spec31 spec32 spec33 spec34
key5 value5
key6 value6
key7 value7
    more11 more12 more13
    more21 more22 more23
key8 value8

value3





From yb at icmail.net  Sat Mar 17 10:43:11 2007
From: yb at icmail.net (Yury)
Date: 17 Mar 2007 07:43:11 -0700
Subject: Writing python module in C: wchar_t or Py_UNICODE?
In-Reply-To: <mailman.5179.1174054409.32031.python-list@python.org>
References: <1174043065.189483.123640@b75g2000hsg.googlegroups.com>
	<mailman.5179.1174054409.32031.python-list@python.org>
Message-ID: <1174142591.181329.315420@n76g2000hsh.googlegroups.com>


Carsten Haese wrote:
>
> You should familiarize yourself with the Python/C API documentation. It
> contains the answers to all the above questions.
>
> http://docs.python.org/api/arg-parsing.html says this about the "u"
> format character: "a pointer to the existing Unicode data is stored into
> the Py_UNICODE pointer variable whose address you pass."
>
> http://docs.python.org/api/unicodeObjects.html says this about
> Py_UNICODE: "On platforms where wchar_t is available and compatible with
> the chosen Python Unicode build variant, Py_UNICODE is a typedef alias
> for wchar_t to enhance native platform compatibility."
>
> The first quote says that, to be strictly correct, "login" should be a
> "Py_UNICODE*", but the second quote says that under the right
> circumstances, Py_UNICODE is the same as wchar_t. It's up to you to
> determine if your platform provides the right circumstances for this to
> be the case.
>
> Hope this helps,
>
> Carsten.

Thanks for reply,
sorry for asking questions while not checked the manual.
Also sorry for my wierd english :)



From bbxx789_05ss at yahoo.com  Mon Mar 26 13:35:26 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 26 Mar 2007 10:35:26 -0700
Subject: Python object overhead?
In-Reply-To: <mailman.5634.1174922041.32031.python-list@python.org>
References: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
	<20070323220459.GS13084@performancedrivers.com>
	<mailman.5634.1174922041.32031.python-list@python.org>
Message-ID: <1174930526.866496.201130@p77g2000hsh.googlegroups.com>

On Mar 26, 9:13 am, "Matt Garman" <matthew.gar... at gmail.com> wrote:
> On 3/23/07, Jack Diederich <jackd... at jackdied.com> wrote:
>
> > If you make the record a new style class (inherit from object) you can
> > specify the __slots__ attribute on the class.  This eliminates the per
> > instance dictionary overhead in exchange for less flexibility.
>
> When you say "new style class", do you mean that the __slots__ feature
> is only available in a newer version of Python?  Unfortunately, I'm
> stuck on 2.3.4 for this project.
>

__slots__ were made available in 2.2 according to GvR's tutorial here:

http://www.python.org/download/releases/2.2.3/descrintro/



From http  Wed Mar 14 02:53:00 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 22:53:00 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<esukru$1v1$1@news2.zwoll1.ov.home.nl>
	<mailman.4919.1173560418.32031.python-list@python.org>
	<7xbqixax63.fsf@ruckus.brouhaha.com>
Message-ID: <7xr6rsiaer.fsf@ruckus.brouhaha.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>     # yield all partitions of n having length k, with many duplications
>     def _partitions(n,k):
>         if k==0: return
>         for i in xrange(1,n-k+1):
>             for p in partitions(n-i, k-1):
>                 yield (i,)+p

Bah, I managed to mess up the above function during transcription.
Corrected and sped-up version:

    # yield all partitions of n having length k, with many duplications
    def _partitions(n,k,low=1):
        if k==1:
            yield (n,)
            return
        for i in xrange(low, n-k+1):
            for p in _partitions(n-i, k-1, i):
                yield (i,)+p


From paul at boddie.org.uk  Sat Mar 31 13:07:05 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 31 Mar 2007 10:07:05 -0700
Subject: Long way around UnicodeDecodeError,
	or 'ascii' codec can't decode byte
In-Reply-To: <1175314508.766924.38830@d57g2000hsg.googlegroups.com>
References: <1175142370.740773.190400@e65g2000hsc.googlegroups.com>
	<1175172787.832055.223350@n76g2000hsh.googlegroups.com>
	<1175314508.766924.38830@d57g2000hsg.googlegroups.com>
Message-ID: <1175360825.747834.70840@n76g2000hsh.googlegroups.com>

Oleg  Parashchenko wrote:
> On Mar 29, 4:53 pm, "Paul Boddie" <p... at boddie.org.uk> wrote:
> > On 29 Mar, 06:26, "Oleg  Parashchenko" <ole... at gmail.com> wrote:
> > >
> > > I'm working on an unicode-aware application. I like to use "print" to
> > > debug programs, but in this case it was nightmare. The most popular
> > > result of "print" was:
> > >
> > > UnicodeDecodeError: 'ascii' codec can't decode byte 0xXX in position
> > > 0: ordinal not in range(128)

I think I've found the actual source of this, and it isn't the print
statement. UnicodeDecodeError relates to the construction of Unicode
objects, not the encoding of such objects as byte strings. The
terminology is explained using this simple diagram (which hopefully
won't be ruined in transmission):

  byte string in XYZ encoding
          |
  (decode from XYZ) --> possible UnicodeDecodeError
          |
          V
  Unicode object
          |
  (encode to ABC) --> possible UnicodeEncodeError
          |
          V
  byte string in ABC encoding

> > What does sys.stdout.encoding say?
>
> 'KOI8-R'

[...]

> > What do you get if you do this...?
> >
> > import locale
> > locale.setlocale(locale.LC_ALL, "")
> > print locale.getlocale()
>
> ('ru_RU', 'koi8-r')
>
> >
> > What is your terminal encoding?
>
> koi8-r

Here's a transcript on my system answering the same questions:

  Python 2.4.1 (#2, Oct  4 2006, 16:53:35)
  [GCC 3.3.5 (Debian 1:3.3.5-8ubuntu2.1)] on linux2
  Type "help", "copyright", "credits" or "license" for more
information.
  >>> import locale
  >>> locale.getlocale()
  (None, None)
  >>> locale.setlocale(locale.LC_ALL, "")
  'en_US.ISO-8859-15'
  >>> locale.getlocale()
  ('en_US', 'iso-8859-15')

So Python knows about the locale. Note that neither of us use UTF-8 as
a system encoding.

  >>> import sys
  >>> sys.stdout.encoding
  'ISO-8859-15'
  >>> sys.stdin.encoding
  'ISO-8859-15'

This tells us that Python could know things about writing Unicode
objects out in the appropriate encoding. I wasn't sure whether Python
was so smart about this, so let's see what happens...

  >>> print unicode("???")
  Traceback (most recent call last):
    File "<stdin>", line 1, in ?
  UnicodeDecodeError: 'ascii' codec can't decode byte 0xe6 in position
0: ordinal not in range(128)

Now this isn't anything to do with the print operation: what's
happening here is that I'm explicitly making a Unicode object but
haven't said what the encoding of my byte string is. The default
encoding is 'ascii' as stated in the error message. None of the
characters provided belong to the ASCII character set.

We can check this by not printing anything out:

  >>> s = unicode("???")
  Traceback (most recent call last):
    File "<stdin>", line 1, in ?
  UnicodeDecodeError: 'ascii' codec can't decode byte 0xe6 in position
0: ordinal not in range(128)

So, let's try again and provide an encoding...

  >>> print unicode("???", sys.stdin.encoding)
  ???

Here, we've mentioned the encoding and even though the print statement
is acting on a Unicode object, it seems to be happy to work out the
resulting encoding.

  >>> print u"???"
  ???

Here, we've skipped the explicit Unicode object construction by using
a Unicode literal, which works in this simple case.

Of course, if your system encoding (along with the terminal) isn't
capable of displaying every Unicode character, you'll experience
problems doing the above. Frequently, it's interesting to encode
things as UTF-8 and look at them in applications that are capable of
displaying the text. Thus, you'd do something like this:

  import unicodedata

(This gets an interesting function to help us look up characters in
the Unicode database.)

  somefile = open("somefile.txt", "wb")
  print >>somefile, unicodedata.lookup("MONGOLIAN VOWEL
SEPARATOR").encode("utf-8")

Or even this:

  import codecs
  somefile = codecs.open("somefile.txt", "wb", encoding="utf-8")
  print >>somefile, unicodedata.lookup("MONGOLIAN VOWEL SEPARATOR")

Here, we only specified the encoding once when opening the file. The
file object accepts Unicode objects thereafter.

> > Usually, if I'm wanting to print Unicode objects, I explicitly encode
> > them into something I know the terminal will support. The codecs
> > module can help with writing Unicode to streams in different
> > encodings, too.
>
> As long as input/output is the only place for such need, it's ok to
> encode expliciyely. But I also had problems, for example, with md5
> module, and I don't know the whole list of potential problematic
> places. Therefore, I'd better go with my brutal utf8ization.

It's best to decode (ie. construct Unicode objects) upon receiving
data as input, and to encode (ie. convert Unicode objects to byte
strings) upon producing output. What may be the problem with the md5
module, and you'd have to post example code for us to help you out, is
that it assumes byte strings and doesn't work properly with Unicode
objects, but I can't say for sure because I'm usually presenting byte
strings to md5 module functions on the rare occasions I do anything
with them. Note that one would usually calculate MD5 checksums on raw
data, although I can imagine a hypothetical (although perhaps
unrealistic) need to do so on Unicode text, so it doesn't necessarily
make much sense to present those functions with Unicode data.

Paul



From cptnwillard at gmail.com  Sun Mar 18 17:20:44 2007
From: cptnwillard at gmail.com (cptnwillard at gmail.com)
Date: 18 Mar 2007 14:20:44 -0700
Subject: list comprehension help
In-Reply-To: <XQgLh.128867$_73.74494@newsread2.news.pas.earthlink.net>
References: <e04d2e90703180911t19675a8evcbcbc11a7154b11f@mail.gmail.com>
	<5f56302b0703180924o3ebf61e2nb2d50280456f8448@mail.gmail.com>
	<mailman.5249.1174236254.32031.python-list@python.org>
	<XQgLh.128867$_73.74494@newsread2.news.pas.earthlink.net>
Message-ID: <1174252844.405851.11460@o5g2000hsb.googlegroups.com>

I wonder whether the following be more efficient if DB was a
dictionnary:

Splits = (line.split(' ') for line in open('file.text', 'r'))
DB = dict([(S[0], S[-1]) for S in Splits])



From tjreedy at udel.edu  Wed Mar 21 19:30:00 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 Mar 2007 19:30:00 -0400
Subject: Printing __doc__
References: <1174506426.108098.243940@d57g2000hsg.googlegroups.com><ets4qe$i0i$00$1@news.t-online.com><1174510376.417966.110370@e1g2000hsg.googlegroups.com>
	<f5o8d4-uns.ln1@lairds.us>
Message-ID: <etsf5n$5t9$1@sea.gmane.org>


"Cameron Laird" <claird at lairds.us> wrote in message 
news:f5o8d4-uns.ln1 at lairds.us...
|| Peter is trying to communicate that some aspects of Python are
| quite conservative, well-documented, and unlikely to change
| across versions or implementations.  The syntax of, let's say,
| "def", is an example of such an aspect.
|
| Peter has no particular evidence about the guarantees of the
|    sys._getframe(1).f_code.co_consts[0]
| resolution; for all he or I know, the core Python maintainers
| might change in an upcoming release the implementation of
| co_consts.  That's what I believe he intends you understand by
| "brittle".

There is also no reason to expect that such code would work with Python 
interpreters other than CPython.

tjr





From sbassi at clubdelarazon.org  Thu Mar 15 13:54:29 2007
From: sbassi at clubdelarazon.org (Sebastian Bassi)
Date: Thu, 15 Mar 2007 14:54:29 -0300
Subject: Box plot in Python
In-Reply-To: <a749952d0703150738p44fbae63vc90b2d5ef4b85d99@mail.gmail.com>
References: <mailman.5123.1173933486.32031.python-list@python.org>
	<167Kh.6054$Um6.1007@newssvr12.news.prodigy.net>
	<a749952d0703150738p44fbae63vc90b2d5ef4b85d99@mail.gmail.com>
Message-ID: <9e2f512b0703151054v609d9988g8eaf2b914d3e7223@mail.gmail.com>

On 3/15/07, Rob Clewley <rhc28 at cornell.edu> wrote:
> Matplotlib supports boxplots in a very straightforward fashion and is
> reasonably documented (just google it!) I actually just submitted a
> patch for extra boxplot features in matplotlib, which you can find on
> the sourceforge patch tracker.

OK, I will try it.
Thanks!


From robert.kern at gmail.com  Sat Mar 17 16:36:00 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Sat, 17 Mar 2007 15:36:00 -0500
Subject: Weekly Python Patch/Bug Summary
In-Reply-To: <ethcno$bkk$1@sea.gmane.org>
References: <200703170454.l2H4skKe003172@bayview.thirdcreek.com><20070317075121.565D11E4005@bag.python.org><etg921$9kt$1@sea.gmane.org>	<20070317102146.4440B1E4010@bag.python.org>
	<ethcno$bkk$1@sea.gmane.org>
Message-ID: <ethjfl$vfi$1@sea.gmane.org>

Terry Reedy wrote:
> "Dick Moores" <rdm at rcblue.com> wrote in message 
> news:20070317102146.4440B1E4010 at bag.python.org...
> | I thought I'd give
> | <http://svn.python.org/projects/python/branches/release25-maint/>
> | (the latest release (plus bug fixes) of Python) a try. I first backed
> | up my Python25 folder (I'm using Win XP). Then with Python 25 open I
> | opened the Explorer context menu for the folder and then the
> | TortoiseSVN sub-menu. There doesn't seem to have a menu item that
> | will enable me to update. I tried Export... and entered
> | <http://svn.python.org/projects/python/branches/release25-maint/> as
> | "URL of repository", but that choice seems to expect the Python25
> | folder to be empty. Can you tell me what to do to just update?
> 
> Just to make sure you know, the svn repository is source code that you will 
> have to compile.  If TortoiseSVN only copies repositories and reads and 
> does not update, then you need svn itself.  But I know almost nothing about 
> it except the name.

It's a fully-functional SVN client. It can update.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From gagsl-py2 at yahoo.com.ar  Thu Mar  8 17:30:21 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Thu, 08 Mar 2007 19:30:21 -0300
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
Message-ID: <op.tov54vywx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 08 Mar 2007 14:33:38 -0300, Bjoern Schliessmann  
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> escribi?:

> Alan Isaac wrote:
>> As a tab user, I want the tabs warning turned off.
>
> Advice: Don't. IIRC it's planned in future Python versions that TABs
> aren't supported for indentation.

AFAIK, using tabs xor spaces will be ok, but not MIXING them.

-- 
Gabriel Genellina



From bill.mill at gmail.com  Fri Mar 23 20:06:20 2007
From: bill.mill at gmail.com (Bill  Mill)
Date: 23 Mar 2007 17:06:20 -0700
Subject: Compiler-AST-Walk-Visitor: Any Examples or Documentation?
In-Reply-To: <4604085c@news.bezeqint.net>
References: <4604085c@news.bezeqint.net>
Message-ID: <1174694780.198131.129000@y66g2000hsf.googlegroups.com>

On Mar 23, 1:10 pm, Efrat Regev <efrat_re... at yahoo.com> wrote:
>      Hello,
>
>      I'm trying to write something that will translate Python code to
> pseudo-code (for teaching purposes). Googling around indicated that the
> compiler module is pertinent, especially creating a visitor to walk the
> generated AST:http://docs.python.org/lib/module-compiler.html
>
>      I can build the AST, but I can't figure out how to write the
> visitor. The package documentation didn't help me out that much, and I
> couldn't find any examples. In fact, google only came up with this
> unanswered related question:http://mail.python.org/pipermail/python-list/2006-July/392716.html
>
>      Any help is appreciated.
>
>       Thanks and Bye,
>
>        Efrat

Maybe some of the files in google codesearch that import compiler and
walk would be helpful?

http://www.google.com/codesearch?q=compiler+walk+lang%3Apython&hl=en&btnG=Search+Code

It seems from a superficial look that some of those files would be
helpful as examples.

-Bill Mill
bill.mill at gmail.com
http://billmill.org



From jeff at jmcneil.net  Wed Mar 28 16:45:39 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Wed, 28 Mar 2007 16:45:39 -0400
Subject: SimpleXMLRPCServer and Threading
In-Reply-To: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>
References: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>
Message-ID: <82d28c40703281345o7a81f091mcf016fb1747c18bf@mail.gmail.com>

I do it this way and it's always worked great for me.

SimpleXMLRPCServer is based on SocketServer, so you can use the ForkingMixIn
or ThreadingMixIn classe to create something to handle requests in
parallel.

from SocketServer import ThreadingMixIn
import SimpleXMLRPCServer

class ThreadedXMLRPCServer(ThreadingMixIn, SimpleXMLRPCServer):
    """"My Threaded XMLRPC Server"""

You'll then use "ThreadedXMLRPCServer" when you instance your server object.

-Jeff



On 3/28/07, Achim Domma <domma at procoders.net> wrote:
>
> Hi,
>
> is SimpleXMLRPCServer multithreaded or how does it handle multiple
> clients? I want to implement a simple server which will be queried by
> multiple processes for work to be done. The server will simply hold a
> queue with files to process. The clients will ask for the next file.
>
> Do I have to sync access to the queue or is the server not threaded at
> all?
>
> regards,
> Achim
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From rampeters at gmail.com  Fri Mar 30 16:36:30 2007
From: rampeters at gmail.com (johnny)
Date: 30 Mar 2007 13:36:30 -0700
Subject: newb: lxml objectify
Message-ID: <1175286990.410155.319780@b75g2000hsg.googlegroups.com>

<Library>
<DVD id="1">
<title>Breakfast at Tiffany's</title>
<format>Movie</format>
<genre>Classic</genre>
</DVD>

<DVD id="2">
<title>Borat</title>
<format>Movie</format>
<genre>Comedy</genre>
</DVD>
</Library>

How do you represent DVD id=1 and it's elements, and DVD id=2 and it's
elements as child of root "Library"?
Like this:?

from lxml import etree
from lxml import objectify

root = objectify.Element("Library")
child[1] = objectify.Element("DVD", id="1")
root.new_child = child[1]

Thank you



From jeff at taupro.com  Fri Mar  9 07:05:18 2007
From: jeff at taupro.com (Jeff Rush)
Date: Fri, 09 Mar 2007 06:05:18 -0600
Subject: A Pythonic Way to Measure and Improve Your Programming Skills?
Message-ID: <45F14D7E.3060707@taupro.com>

(inspired by a thread on the psf-members list about Python certification)

Those who know me know I am no fan of the programmer certification industry 
and I agree that your typical certificate arrangement, e.g. to show HR to get 
that box checked in your candidate file, so a company can skip responsibility 
in vetting a candidate, is un-Pythonic.  However, I do think we need a good 
answer to the engineering manager or team leader who asks, "how do I know this 
person knows Python?", and to the candidate who thinks, "I believe I'm good at 
Python but am I as good as I think?".

The first case primarily cares about the reputation of the testing facility 
within the industry, so that if they choose wrong, they are absolved of blame. 
The latter two are often honestly looking for some guidance on bringing good 
people in-house or to step-up their programming skills.

As Python use spreads, it becomes more important for the community to provide 
benchmarks for measuring skill levels, to avoid Python being relegated to the, 
respectfully, lightweight programmer category e.g. PHP or perhaps Ruby on 
Rails (not Ruby the language).

Prior to PyCon I'd been thinking about some kind of campaign, service or 
documents, that I call "So you think you know Python...".  My initial idea was 
for use by Python programmers, who are honest with themselves, to have a way 
to measure their knowledge.  We all run into or are programmers who think they 
are hot-stuff, especially those of us who work solo as many in our community 
do, but when put side-by-side against others, fall a bit short.  PyCon can 
have that effect, with so many smart people in a small area. ;-) But the 
objective isn't to denegrate these programmers but to provide a measuring 
stick, along with an educational roadmap, so they can make wise choices.

The rapid growth in use of Python is going to lead to a shortage in Python 
programmers, unless we manage the supply side as well.  The manager wanting to 
find and hire good Python programmers is not an adversary seeking to use 
certificates to commoditize our community, but an ally in helping us get 
industry respect and career opportunities using our favorite language.  We 
need to behind what he asks for to see what he needs.

I've been carefully watching Crunchy, about which a talk was given at PyCon, 
for writing tutorials that, with its "doctests" feature, could be used to 
propose tests that pass and require a candidate to write an acceptable 
program.  This week I was prototyping an "rst2crunchy" tool, that let's you 
write Crunchy scripts in reStructured Text, rather than HTML.  Crunchy needs 
more features, such as a user login facility and measurement facilities to 
store test submissions for review by experienced Python programmers after they 
pass.  From what I hear on the edu-sig list, Andr? Roberge and Johannes 
Woolard are tackling these but could use more help.  Johannes in particular 
was a student for Google's Summer of Code 2006 and I believe is looking for 
sponsorship for 2007.

But perhaps Crunchy is not the ready answer in this case, so I'm looking for 
suggestions.

With regard to how a manager can know a person is good at Python, besides 
looking at their portfolio of work, we could stake out conceptual areas of the 
language or libraries about which a programmer should be conversant.  This 
might be a document, with example questions but carefully focused on what lies 
behind those questions, so an interviewer can come up with his own questions 
and avoid rote memorization.  This conceptual map could also eventually form 
the basis of advanced-placement in schools that goes beyond those terrible 
Visual BASIC test questions.  And for the Python programmer who wonders if his 
knowledge is broad enough and wants to improve him or herself, the conceptual 
map could have links/recommendations to training materials on specific topics.

Join me on the advocacy list and let's discuss this further.

You can join at:
   http://mail.python.org/mailman/listinfo/advocacy

Jeff Rush
Python Advocacy Coordinator


From steve at holdenweb.com  Tue Mar 20 08:38:03 2007
From: steve at holdenweb.com (Steve Holden)
Date: Tue, 20 Mar 2007 08:38:03 -0400
Subject: Bullet proof passing numeric values from NMEA data stream.
In-Reply-To: <pan.2007.03.20.12.09.21.19785@localhost.localdomain>
References: <pan.2007.03.20.12.09.21.19785@localhost.localdomain>
Message-ID: <etoklt$kan$1@sea.gmane.org>

Doug Gray wrote:
> Folks,
> I am looking for a fast but most importantly a bullet proof method to pass
> and NMEA data stream (GPS output) ascii numeric strings. The best I can
> offer is:
> 
> def fint(a):
>  try: return int(float(a))
>  except: return 0
> 
> The reason for this is the quality of the data from the huge variety of
> GPS units available varies considerably.  Some units do not follow the
> standard and I want to pass the data as best I can without hanging the
> code for an oddball data value.
> 
> Can anyone suggest better?
> 
> For example, each of the following throw the exception so do not return
> the correct value:
> 
> int('00.')
> int(' 00.')
> float('-  00')
> float(' -  00')
> float(' -  00')
> float(' -  00.')
> float('-  00.')
> float('-  10.')
> float('- 10.')
> float('- 10.')
> int('- 10.')
> int('- 10.')
> float('- 10.')
> int('1.0')
> 
> Also, why should I consider the string module?  Is it faster/better?
> 
> TIA,
> Doug

Try something like

def fint(s):
   return float(s.replace(" ", ""))

I really don't think it's a good idea to silently ignore conversion 
errors in GPS positioning.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From raims at dot.com  Thu Mar 22 20:02:00 2007
From: raims at dot.com (Lawrence Oluyede)
Date: Fri, 23 Mar 2007 01:02:00 +0100
Subject: ZSI, SOAP and .NET web services - problem
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
Message-ID: <1hvelcy.1u143wc9yykfgN%raims@dot.com>

Jaroslaw Zabiello <hipertracker at gmail.com> wrote:
> Why nobody wants to add SOAP to standard Python library? XML-RPC was added
> and it works without any problems.

I think because SOAP is kinda crappy :-)

Did you try soaplib? <http://trac.optio.webfactional.com/>

I've never used it (nor SOAP in a while) but seems promising

-- 
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand 
something when his salary depends on not
understanding it" - Upton Sinclair


From sturlamolden at yahoo.no  Sun Mar 18 16:52:48 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 18 Mar 2007 13:52:48 -0700
Subject: Webcams and python
In-Reply-To: <1174244469.099300.86910@l77g2000hsb.googlegroups.com>
References: <1174182674.500068.252550@p15g2000hsd.googlegroups.com>
	<pan.2007.03.18.08.24.46.950750@gmx.net>
	<1174228881.417754.26020@e65g2000hsc.googlegroups.com>
	<1174241842.666367.25290@n76g2000hsh.googlegroups.com>
	<1174244469.099300.86910@l77g2000hsb.googlegroups.com>
Message-ID: <1174251168.944746.277320@o5g2000hsb.googlegroups.com>

On Mar 18, 8:01 pm, "Synt4x" <ianmurr... at gmail.com> wrote:

> I haven't been able to find the win32api extension, but i've read on
> the web that time.sleep() calls win32api.Sleep().


I tested VideoCapture using PyGame to draw the graphics. PyGame wraps
SDL which uses DirectDraw on Windows. I don't think it matters much,
but DirectX is known to be faster than e.g. GDI and DIB sections.

With 10 fps, I get around 10-15% CPU usage on my laptop. The video
does not look too bad, but it's not perfect. With 20 fps I get 30-40%
CPU usage, and the video looks very smooth. I don't think my webcam
could do any better anyway. CPU use in not anywhere near saturation.

pygame.time.delay() just calls Sleep() in the Windows API, after
setting time resolution to multimedia mode. So adjust the amount of
time you keep the thread asleep.


import VideoCapture
import pygame
from pygame.locals import *
import sys

fps = 20.0
webcam = VideoCapture.Device()
webcam.setResolution(640,480)
pygame.init()
window = pygame.display.set_mode((640,480))
pygame.display.set_caption("WebCam Demo")
screen = pygame.display.get_surface()
while True:
    events = pygame.event.get()
    for event in events:
        if event.type == QUIT or event.type == KEYDOWN:
            sys.exit(0)
    im = webcam.getImage()
    pg_img = pygame.image.frombuffer(im.tostring(), im.size, im.mode)
    screen.blit(pg_img, (0,0))
    pygame.display.flip()
    pygame.time.delay(int(1000 * 1.0/fps))




From olepar at gmail.com  Thu Mar 29 00:26:10 2007
From: olepar at gmail.com (Oleg  Parashchenko)
Date: 28 Mar 2007 21:26:10 -0700
Subject: Long way around UnicodeDecodeError, or 'ascii' codec can't decode byte
Message-ID: <1175142370.740773.190400@e65g2000hsc.googlegroups.com>

Hello,

I'm working on an unicode-aware application. I like to use "print" to
debug programs, but in this case it was nightmare. The most popular
result of "print" was:

UnicodeDecodeError: 'ascii' codec can't decode byte 0xXX in position
0: ordinal not in range(128)

I spent two hours fixing it, and I hope it's done. The solution is one
of the ugliest hack I ever written, but it solves the pain. The full
story and the code is in my blog:

http://uucode.com/blog/2007/03/23/shut-up-you-dummy-7-bit-python/

--
Oleg Parashchenko  olpa@ http://uucode.com/
http://uucode.com/blog/  Generative Programming, XML, TeX, Scheme
http://tohtml.com/       Online syntax highlighting



From EneUran at yahoo.com  Tue Mar 27 13:21:13 2007
From: EneUran at yahoo.com (Ene)
Date: 27 Mar 2007 10:21:13 -0700
Subject: Auto execute python in USB flash disk
In-Reply-To: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
Message-ID: <1175016073.436411.7500@b75g2000hsg.googlegroups.com>

On Mar 27, 9:56 am, "Brian Erhard" <theema... at gmail.com> wrote:
> I am still fairly new to python and wanted to attempt a home made
> password protection program.  There are files that I carry on a USB
> flash drive that I would like to password protect.  Essentially, I
> would like to password protect an entire directory of files.  Is there
> a way to auto execute a python script after a user double clicks to
> open a folder on the USB drive? How can you capture that double click
> event on a specific folder?
>
> Thanks.

Install the free PortablePython from http://www.portablepython.com/ on
your USB
flash drive, and go from there.



From dek at oliver.lbl.gov  Mon Mar 26 16:06:28 2007
From: dek at oliver.lbl.gov (David E. Konerding DSD staff)
Date: Mon, 26 Mar 2007 20:06:28 +0000 (UTC)
Subject: ZSI, SOAP and .NET web services - problem
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
Message-ID: <slrnf0g9u4.jo9.dek@oliver.lbl.gov>

On 2007-03-22, Jaroslaw Zabiello <hipertracker at gmail.com> wrote:
> I try to connect to web services (written in C#/.NET) with latest ZSI
> 2.0rc3 library. It just does not work.
>
> from ZSI.ServiceProxy import ServiceProxy 
> wsdl = 'http://192.168.0.103/NewWebServices/TemplateInsert.asmx?wsdl' 
> print ServiceProxy(wsdl, tracefile=sys.stdout) 
>
> "C:\opt\Python25\lib\site-packages\zsi-2.0_rc3-py2.5.egg\ZSI\wstools\WSDLTools.py",
> line 1116, in getAddressBinding 
> WSDLError: No address binding found in port. 
>
> This pythonic library must be stupid, because I have no problem to connect
> with... Ruby:

Actually, it's likely just more tolerant of an error in your WSDL
(leaving out your address binding).

Many of the WSDL toolkits ignore leaving out the address binding in the port type.

The java tooling seems to work that way and apparently ruby is the same way.

Try fixing your WSDL, then try again.


From zxo102 at gmail.com  Sat Mar  3 19:25:53 2007
From: zxo102 at gmail.com (zxo102)
Date: 3 Mar 2007 16:25:53 -0800
Subject: py2exe: LoadLibrary(pythondll) failed
In-Reply-To: <mailman.4636.1172962243.32031.python-list@python.org>
References: <1172947039.158260.225980@j27g2000cwj.googlegroups.com>
	<mailman.4636.1172962243.32031.python-list@python.org>
Message-ID: <1172967953.377892.239160@s48g2000cws.googlegroups.com>

On 3?4?, ??6?50?, Thomas Heller <thel... at ctypes.org> wrote:
> zxo102 schrieb:
>
> > Hi there,
> >    I py2exe my test.py  as test.exe with a lot of dll and pyc in that
> > directory. If I move the test.exe into another directory and run it
> > from there, it gives me an error " LoadLibrary(pythondll) failed...
> > python24.dll".  How can I set it up correctly for this test.exe to
> > run?   Thanks.
>
> > Ouyang
>
> The test.exe created by py2exe relies on everything else in the dist directory,
> so you must copy these files as well.
>
> Thomas

Thanks. Let me try it.



From jan.m.danielsson at gmail.com  Fri Mar 16 10:57:15 2007
From: jan.m.danielsson at gmail.com (Jan Danielsson)
Date: Fri, 16 Mar 2007 15:57:15 +0100
Subject: Mastering Python
In-Reply-To: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
Message-ID: <45FAB04B.9000504@gmail.com>

Gerald wrote:
> Hi ,Im a BSc4 Maths/Computer Science student.Unfortunately my
> curriculum did not include Python programming yet I see many vacancies
> for Python developers.I studied programming Pascal,C++ and Delphi.So I
> need to catch up quickly and master Python programming.How do you
> suggest that I achieve this goal?

   1. Chose a project for yourself
   2. Write it

   I needed a distributed white board application for working on a World
Domination Plan with my friends, so I selected that as a good "get to
learn Python" project.

> Is python platform independent?

   Mostly..

> What
> is the best way?And how long would it take before I can develop
> applications using python?

   Depends on your learning skills, and what kind of applications we're
talking about.


-- 
Kind regards,
Jan Danielsson
------------ And now a word from our sponsor ------------------
Want to have instant messaging, and chat rooms, and discussion
groups for your local users or business, you need dbabble!
--  See http://netwinsite.com/sponsor/sponsor_dbabble.htm  ----


From aurora00 at gmail.com  Mon Mar 19 15:06:39 2007
From: aurora00 at gmail.com (aurora00 at gmail.com)
Date: 19 Mar 2007 12:06:39 -0700
Subject: Create TarFile using string buffers
Message-ID: <1174331199.134156.105430@n59g2000hsh.googlegroups.com>

I have a program that generates a number of files that will be
packaged into a tarball. Can I stream the content into TarFile without
first writing them out to the file system? All add(), addfile() and
gettarinfo() seems to assume there is a file in the disk. But for me I
seems inefficient to write all the content to the disk and then have
it read back by the TarFile module.

Thank you for your help

wy



From ccheneson at gmail.com  Thu Mar 22 09:14:31 2007
From: ccheneson at gmail.com (Cyril Cheneson)
Date: Thu, 22 Mar 2007 14:14:31 +0100
Subject: Removing a particular index from a list
In-Reply-To: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
References: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
Message-ID: <380349af0703220614i394fef2evb38d256245870981@mail.gmail.com>

>>> li = ["sri", "s", "srikanth", "s"]

> And if I want to remove the last item ("s"), how do I remove it?
> li.remove(-1) doesn't do it. This is my problem.
>
> Thanks,
> Srikanth
>

li.pop() will remove the last element

Cyril


From spohle at gmail.com  Sat Mar 17 19:07:44 2007
From: spohle at gmail.com (spohle)
Date: 17 Mar 2007 16:07:44 -0700
Subject: formatting strings to have the same width
Message-ID: <1174172864.205137.193740@y66g2000hsf.googlegroups.com>

hi,

i got random strings and wanna attach a " |  " at the end. now if i
print them i want the | to always be underneath each other. example
code:

foo = ["aaa", "1232"]
for each in foo:

print foo[0].center(10, " ") + " | "
foo2 = "1232"
print foo2.center(10, " ") + " | "

even though i define a constant width on the strings the | don't show
up underneath each other.
any ideas ?



From jfine at pytex.org  Tue Mar 20 11:33:10 2007
From: jfine at pytex.org (Jonathan Fine)
Date: Tue, 20 Mar 2007 15:33:10 +0000
Subject: Wanted:  a python24 package for Python 2.3
Message-ID: <45FFFEB6.2080403@pytex.org>

Hello

My problem is that I want a Python 2.4 module on
a server that is running Python 2.3.  I definitely
want to use the 2.4 module, and I don't want to
require the server to move to Python 2.4.

More exactly, I am using subprocess, which is
new in Python 2.4.  What I am writing is something
like
===
from subprocess import Popen
===

This will fail in Python 2.3, in which case I
would like to write something like
===
try:
     from subprocess import Popen
else ImportError:
     from somewhere_else import Popen
===

Put this way, it is clear (to me) that somewhere_else
should be python24.

In other words, I'm asking for a python24 package that
contains all (or most) of the modules that are new to
Python 2.4.

I've looked around a bit, and it seems that this
formulation of the solution is new.  I wonder if
anyone else has encountered this problem, or has
comments on my solution.

-- 
Jonathan



From bbxx789_05ss at yahoo.com  Sat Mar 24 15:10:12 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 12:10:12 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <mailman.5555.1174759784.32031.python-list@python.org>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5555.1174759784.32031.python-list@python.org>
Message-ID: <1174763412.409665.19870@l75g2000hse.googlegroups.com>

On Mar 24, 12:09 pm, "Greg Donald" <gdon... at gmail.com> wrote:
> On 24 Mar 2007 10:30:28 -0700, Robert Hicks <sigz... at gmail.com> wrote:
>
> > I want to upgrade to 2.5 but I don't see any unistall instructions
> > anywhere.
>
> You're not required to remove the old version before installing the new version.
>
> Just install the new version somewhere like /usr/local and put
> /usr/local/bin ahead of your other paths.
>
> --
> Greg Donaldhttp://destiney.com/

Can you explain how that works?  If you install python in /usr/local,
doesn't that leave you with something like /usr/local/python?  So what
does putting usr/local/bin ahead of your other paths do?



From http  Tue Mar 13 20:54:37 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 16:54:37 -0800
Subject: help!! *extra* tricky web page to extract data from...
References: <1173819262.288501.66350@n76g2000hsh.googlegroups.com>
	<55ojorF26c25jU1@mid.uni-berlin.de>
	<55oli1F25u2dmU1@mid.uni-berlin.de>
	<7xmz2gbx6r.fsf@ruckus.brouhaha.com>
	<55omooF25ll0vU1@mid.uni-berlin.de>
	<7x1wjskbs7.fsf@ruckus.brouhaha.com>
	<55op6uF24n2biU1@mid.uni-berlin.de>
	<7xy7m0eny5.fsf@ruckus.brouhaha.com>
	<mailman.5047.1173832720.32031.python-list@python.org>
Message-ID: <7x4pooir02.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> I especially like the rems and conditions they ask you to acknowledge
> if you want to sign up as a worker:
>    http://www.captchasolver.com/join/worker#

Heh, cute, I guess you have to solve a different type of puzzle to
read them.

I'm surprised anyone is purporting to pay actual money for captcha
solutions.  The usual scheme I've herad (dunno if anyone actually does
it) is to feed the captchas you want to solve into a porn site, so
people give you solutions in order to keep viewing porn.  You then
funnel the solutions back to the forms you're actually trying to
automate.

I think captchas are proving reasonably effective as a speed bump but
they do get defeated all the time, whether through automatic means or
otherwise.


From gagsl-py2 at yahoo.com.ar  Fri Mar 23 18:21:09 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 19:21:09 -0300
Subject: Python object overhead?
References: <bdd6985b0703231411k7f55835dh5e7b0d2289d33067@mail.gmail.com>
Message-ID: <op.tpnxpjv9x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 18:11:35 -0300, Matt Garman <matthew.garman at gmail.com>  
escribi?:

> Example 2: read lines into objects:
> # begin readobjects.py
> import sys, time
> class FileRecord:
>     def __init__(self, line):
>         self.line = line
> records = list()
> file = open(sys.argv[1])
> while True:
>     line = file.readline()
>     if len(line) == 0: break # EOF
>     rec = FileRecord(line)
>     records.append(rec)
> file.close()
> print "data read; sleeping 20 seconds..."
> time.sleep(20) # gives time to check top
> # end readobjects.py

Your file record requires at least two objects in addition to the line  
itself: the FileRecord instance and the dictionary instance (__dict__)  
used to hold its attributes.
You can use a new style class with __slots__ to omit that dictionary:

class FileRecord(object):
     __slots__ = ['line']
     def __init__(self, line):
         self.line = line

or defer instance creation:

class FileRecords(list):
     # store here all the lines, maybe using readlines()
     def __getitem__(self, index):
         return FileRecord(list.__getitem__(self, index))

-- 
Gabriel Genellina



From paul at boddie.org.uk  Sat Mar 10 13:19:21 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 10 Mar 2007 10:19:21 -0800
Subject: OLPC vs. mobile phones (was Re: merits of Lisp vs Python)
In-Reply-To: <mailman.4870.1173472397.32031.python-list@python.org>
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
	<1huohy5.1273xi3mtqdc2N%aleax@mac.com>
	<essbfq$ro4$1$830fa7a5@news.demon.co.uk>
	<mailman.4870.1173472397.32031.python-list@python.org>
Message-ID: <1173550761.333633.270760@q40g2000cwq.googlegroups.com>

Gabriel Genellina wrote:
> En Fri, 09 Mar 2007 16:10:51 -0300, Tim Bradshaw <tfb at tfeb.org> escribi?:
>
> > The electronic gadget people need in the developing world is a mobile phone not a
> > computer.
>
> What for?
> That requires a phone company, installed antennas everywhere, and
> available power to charge batteries. Without forgetting  you to pay the
> bill, of course.

"What people in the developing world needs is Iridium!" Oops! ;-) I've
heard of people doing interesting things with mobile phones in various
developing countries, and I'm sure that the infrastructure is
gradually expanding in some places, but the mobile phone is largely a
"consumer" device: you pay big corporations to use their networks and
to download largely frivolous content. I hardly think such things are
on the same page as the OLPC vision.

> I don't think OLPC would actually help people so much, but a mobile phone
> would be almost useless. Like it was -actually happened- donating nice
> computers for use in remote elementary schools with no power source.

Yes, such things were mentioned in the FOSDEM OLPC talk [1]. It's all
very well having rich Europeans or Americans (especially thinking of
people like Bill Gates who seems to opine regularly on such things in
a way which is unlikely to be completely disconnected to his business
interests) saying that all the old kit that people don't want any more
(because they must have that new quad-core laptop!) should be shipped
out to places that "need" it, but the issue is whether the recipients
really do need to have aging, power-hungry technology with special
waste disposal requirements when it finally gives up the ghost.

Sure, give people a bunch of old PCs (and why not all those CRTs,
too?) which consume tens of watts per unit. Do we have any old solar
panels to ship out with them? Or how about building some nuclear power
stations to go with all this equipment? Still a good idea?!

Paul

[1] Videos are available at http://www.fosdem.org/2007/media/video -
and in an open format, too. (Hint to any conference people thinking of
just uploading stuff to YouTube!)



From sgeiger at ncee.net  Tue Mar 27 17:06:41 2007
From: sgeiger at ncee.net (Shane Geiger)
Date: Tue, 27 Mar 2007 16:06:41 -0500
Subject: Auto execute python in USB flash disk
In-Reply-To: <4609578C.5040601@timgolden.me.uk>
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
	<4609578C.5040601@timgolden.me.uk>
Message-ID: <46098761.6080906@ncee.net>


>> Is there
>> a way to auto execute a python script after a user double clicks to
>> open a folder on the USB drive? How can you capture that double click
>> event on a specific folder?
>>     
>
> That would depend on what desktop / Operating System you're
> using. If it's Windows, you need a shell extension (which
> is non-trivial to understand and write). If it's one of the
> Linux desktops, someone else had better chip in!
>   

http://www.voidspace.org.uk/python/weblog/arch_d7_2006_07_15.shtml#e390


--------------------------------------------------


There is a new version of `Movable Python
<http://www.voidspace.org.uk/python/movpy/>`_
available.

This is available for **Movable Python** for Python 2.2.3, 2.3.5, 2.4.3
and 2.5rc2 from :

    `The Movable Python Groups Page
<http://voidspace.tradebit.com/groups.php>`_



What is Movable Python
==================

Movable Python is a portable distribution of Python for windows,
designed to be run off a USB stick or computers that don't have Python
installed. It features an IDE (Pythonwin and IDLE are included - but
you can also use SPE), and a GUI launcher.

It can be configured to use multiple interpreters from a single
interface, including acting as a GUI for any executable.

It has a host of other features (like logging all output from files,
enabling psyco for all scripts, etc).

See the following link for a list of all the new features in Movable
Python 2.0.0 :


http://www.voidspace.org.uk/python/weblog/arch_d7_2006_07_15.shtml#e390

For an overview of the most important features (with screenshots) see :


http://www.voidspace.org.uk/python/weblog/arch_d7_2006_07_22.shtml#e396

Other uses for Movable Python include testing programs with different
versions of Python, and providing clean install 'sandboxes' for testing
programs. It is also an ideal launcher for IronPython.




-- 
Shane Geiger
IT Director
National Council on Economic Education
sgeiger at ncee.net  |  402-438-8958  |  http://www.ncee.net

Leading the Campaign for Economic and Financial Literacy

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From jzgoda at o2.usun.pl  Fri Mar 23 19:14:15 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Sat, 24 Mar 2007 00:14:15 +0100
Subject: Create new processes over telnet in XP
In-Reply-To: <46045acb$0$326$e4fe514c@news.xs4all.nl>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>	<46043ad8$0$27402$ba4acef3@news.orange.fr>
	<mailman.5531.1174684678.32031.python-list@python.org>
	<46045acb$0$326$e4fe514c@news.xs4all.nl>
Message-ID: <eu1n1h$f05$1@atlantis.news.tpi.pl>

Irmen de Jong napisa?(a):

> Python uses a MSI (microsoft installer) based installer on windows.
> This was introduced in version 2.5 I believe.

2.4? I recall that we installed 2.4.2 this way on >500 machines some day
at my previous work.

-- 
Jarek Zgoda
http://jpa.berlios.de/


From DustanGroups at gmail.com  Tue Mar 13 13:48:09 2007
From: DustanGroups at gmail.com (Dustan)
Date: 13 Mar 2007 10:48:09 -0700
Subject: Eureka moments in Python
In-Reply-To: <mailman.5019.1173798317.32031.python-list@python.org>
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
	<mailman.5019.1173798317.32031.python-list@python.org>
Message-ID: <1173808089.361229.89350@n33g2000cwc.googlegroups.com>

On Mar 13, 10:05 am, Brett g Porter <bgpor... at acm.org> wrote:
> Steven D'Aprano wrote:
> > I'd be interested in hearing people's stories of Eureka moments in Python,
> > moments where you suddenly realise that some task which seemed like it
> > would be hard work was easy with Python.
>
> Mine was definitely when I was first working with the xmlrpc module, and
> I was puzzled to no end how it was that I was able to make a call to a
> method of an object when that method didn't exist. All the talk about
> Python being a dynamic language had bounced off of me until that moment,
> when I walked through the __getattr__ method in the debugger and was
> enlightened.
>
> Not surprisingly, that was also the moment when C++ started feeling like
> a straightjacket to me...

Started? Meaning there was a time when it DIDN'T feel like a
straightjacket? If I were a journalist, this would be all over the
news...



From bbxx789_05ss at yahoo.com  Fri Mar 23 13:55:03 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 23 Mar 2007 10:55:03 -0700
Subject: "finally" for unit test
In-Reply-To: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
Message-ID: <1174672503.253926.291840@y66g2000hsf.googlegroups.com>

On Mar 23, 5:18 am, "killkolor" <gabriel.h... at gmail.com> wrote:
> I have .. a single function that ..
> works with files (takes input and outputs in the same file, no return
> values).

That function could cause problems.  If your function reads in the
whole file, modifies the data, and then overwrites the file, what
would happen if something unforeseen happened and your program crashed
after writing one line to the file?  All the data in memory would go
poof! and your file would contain 1 line it--effectively erasing the
entire contents of the file.



From duncan.booth at invalid.invalid  Fri Mar 30 09:14:33 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 30 Mar 2007 13:14:33 GMT
Subject: which methods to use?
References: <1175126969.200404.24370@e65g2000hsc.googlegroups.com>
	<euf11o$rk6$1@aioe.org>
	<1175130991.799268.311470@n59g2000hsh.googlegroups.com>
	<pan.2007.03.29.04.56.14.874710@REMOVE.THIS.cybersource.com.au>
	<mailman.5767.1175190942.32031.python-list@python.org>
	<pan.2007.03.30.13.01.42.679715@REMOVE.THIS.cybersource.com.au>
Message-ID: <Xns990390E17F0DBduncanbooth@127.0.0.1>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:

>> py> id(object()) == id(object())
>> True
>> py> object() is object()
>> False
> 
> That's weird. How on earth does that happen?

The lifetimes of the two objects createted in the first comparison do 
not overlap: once the call to id() returns it immediately drops the 
reference to its parameter. Python's memory allocation has a tendency to 
reuse memory immediately so the second call to object() creates another 
object at the same location.

In the second comparison neither object can be released until the 'is' 
operator returns a result, so there is no memory reuse.

>> So using the `is` operator is the only safe way to test for identity.
> 
> But if an object can be garbage collected before the is operator does 
the
> comparison, how can that be safe?

The objects compared using the is operator have at least one reference, 
so they cannot be subject to garbage collection.

You might get some risky situations if you bring weakrefs into the mix. 
For example de-referencing two weak references to different objects both 
of which get garbage collected compares True because both references now 
return None.

>>> c1, c2 = C(), C()
>>> r1, r2 = weakref.ref(c1), weakref.ref(c2)
>>> r1() is r2()
False
>>> del c1
>>> del c2
>>> r1() is r2()
True



From olsonas at gmail.com  Tue Mar 13 14:54:07 2007
From: olsonas at gmail.com (Drew)
Date: 13 Mar 2007 11:54:07 -0700
Subject: Iterating across a filtered list
In-Reply-To: <7xveh5nfwz.fsf@ruckus.brouhaha.com>
References: <1173809090.092546.255710@64g2000cwx.googlegroups.com>
	<7xveh5nfwz.fsf@ruckus.brouhaha.com>
Message-ID: <1173812047.578137.223430@j27g2000cwj.googlegroups.com>

On Mar 13, 2:42 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> If I can decipher your Ruby example (I don't know Ruby), I think you
> want:
>
>    for name,contact in contacts.iteritems():
>       if re.search('search', name):
>           print contact
>
> If you just want to filter the dictionary inside an expression, you
> can use a generator expression:
>
>   d = ((name,contact) for (name,contact) in contacts.iteritems() \
>                         if re.search('search', name))
>
>   print '\n'.join(d)   # prints items from filtered dict, one per line
>
> Note that d is an iterator, which means it mutates when you step
> through it.

Paul -

You're exactly on the mark. I guess I was just wondering if your first
example (that is, breaking the if statement away from the iteration)
was preferred rather than initially filtering and then iterating.
However, you're examples make a lot of sense are are quite helpful.

Thanks,
Drew



From DavidRushby at gmail.com  Fri Mar 23 12:24:34 2007
From: DavidRushby at gmail.com (David Rushby)
Date: 23 Mar 2007 09:24:34 -0700
Subject: GCC 4.1.2 installer for Python distutils compilation
In-Reply-To: <cPcLh.11089$6.9599@tornado.fastwebnet.it>
References: <mailman.5240.1174195220.32031.python-announce-list@python.org>
	<1174220692.775873.211740@l75g2000hse.googlegroups.com>
	<cPcLh.11089$6.9599@tornado.fastwebnet.it>
Message-ID: <1174667074.075285.142440@l77g2000hsb.googlegroups.com>

On Mar 18, 6:22 pm, Giovanni Bajo <n... at ask.me> wrote:
> On 18/03/2007 13.24, DavidRushbywrote:
>
> > Even though I have access to MSVC 7.1, so I don't really need MinGW
> > myself, [...]
>
> But remember that GCC 4.1.2 is almost 4 years newer than MSVC 7.1, and
> I found it to produce more optimized code (especially for C++). Since it's
> a free alternative, it might be worth to give it a go :)

I just wrote a high-performance Windows-1251 codec in C (an optimized
alternative to Python's including 'cp1251' codec).

On Windows 2000 / Prescott PIV, GCC 4.1.2 does indeed produce code
that is 30% faster than MSVC (this is with aggressive optimization
switch tinkering on both compilers).  This is for fairly simple, non-
floating-point C code.



From aleax at mac.com  Mon Mar 19 11:05:11 2007
From: aleax at mac.com (Alex Martelli)
Date: Mon, 19 Mar 2007 08:05:11 -0700
Subject: Executing a list of functions
References: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>
	<etfdkg$ilt$1@daisy.noc.ucla.edu>
	<1174316346.944396.298810@n76g2000hsh.googlegroups.com>
Message-ID: <1hv7qcu.1cenc6m1kfmavrN%aleax@mac.com>

HMS Surprise <john at datavoiceint.com> wrote:
   ...
> Why is apply deprecated?

Because it does exacly the same job as just calling the function with
*a/**k, and there should preferably be only one obvious way to perform a
given task (this guiding principle leads to simplicity in the language,
and is common to Python and to the "Spirit of C" as explained in the
preface of the ISO C Standard -- they phrase it as "offer only one way
to perform an operation", I believe).


Alex


From davidnicolson1 at hotmail.com  Wed Mar 28 13:28:45 2007
From: davidnicolson1 at hotmail.com (David Nicolson)
Date: Thu, 29 Mar 2007 03:28:45 +1000
Subject: very strange syntax errors
In-Reply-To: <9rxOh.107891$ia7.93435@newsfe14.lga>
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
	<9rxOh.107891$ia7.93435@newsfe14.lga>
Message-ID: <BAY105-DAV430DBE4BB7BF2290421C1956D0@phx.gbl>

This might be stating the obvious, but have you detabbed your text,  
if you are using spaces?


On 28/03/2007, at 8:18 PM, hg wrote:

> hg wrote:
>
>> Hi,
>>
>> I'v been facing some very strange errors lately:
>>
>> one example:
>>
>> def __init__(self):
>> ....
>>         import my_info
>>         some_text = my_info.T_SOME_TEXT
>>                                       ^ syntax error
>>
>>
>> I manage to get rid of that one by moving the import on top of my  
>> file.
>>
>> Note: Python 2.4.1 under Windows
>>
>>
>> Any clue ?
>>
>> Thanks,
>>
>> hg
>
>
> PS:
>
> and I also get some even weirder studd such as an error on line 374  
> when I
> add a print on line 65
>
> I'm using pydev + pydev ext
>
> hg
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list





From xiong.xu.cn at gmail.com  Mon Mar 12 23:34:00 2007
From: xiong.xu.cn at gmail.com (imx)
Date: 12 Mar 2007 20:34:00 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173717568.915583.194060@8g2000cwh.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
	<1173717568.915583.194060@8g2000cwh.googlegroups.com>
Message-ID: <1173756839.707944.145510@s48g2000cws.googlegroups.com>

On 3?13?, ??12?39?, "daftspan... at gmail.com" <daftspan... at gmail.com>
wrote:
> On Mar 12, 7:32 am, "imx" <xiong.xu... at gmail.com> wrote:
>
> > I wonder whether python can be used to simulate a real user to do the
> > following:
> > 1) open a web site in a browser;
> > 2) printscreen, so to copy the current active window image to
> > clipboard;
> > 3) save the image file to a real file
> > Any pointer will be apprieciated!
> > Xiong
>
> Google pywinauto.
>
> HTH
>
> Davy

I checked pyglet, it's in early development stage. Since I'm using
windows, I will try pywinauto.

Thanks,
Xiong



From lbates at websafe.com  Mon Mar 19 18:25:55 2007
From: lbates at websafe.com (Larry Bates)
Date: Mon, 19 Mar 2007 17:25:55 -0500
Subject: SQLObject 0.8.1
In-Reply-To: <mailman.5287.1174323773.32031.python-list@python.org>
References: <mailman.5287.1174323773.32031.python-list@python.org>
Message-ID: <cN-dnakGPZhzkGLYnZ2dnUVZ_hninZ2d@comcast.com>

Oleg Broytmann wrote:
> Hello!
> 
> I'm pleased to announce the 0.8.1 release of SQLObject.
> 
> 
> What is SQLObject
> =================
> 
> SQLObject is an object-relational mapper.  Your database tables are described
> as classes, and rows are instances of those classes.  SQLObject is meant to be
> easy to use and quick to get started with.
> 
> SQLObject supports a number of backends: MySQL, PostgreSQL, SQLite, and
> Firebird.  It also has newly added support for Sybase, MSSQL and MaxDB (also
> known as SAPDB).
> 
> 
> Where is SQLObject
> ==================
> 
> Site:
> http://sqlobject.org
> 
> Development:
> http://sqlobject.org/devel/
> 
> Mailing list:
> https://lists.sourceforge.net/mailman/listinfo/sqlobject-discuss
> 
> Archives:
> http://news.gmane.org/gmane.comp.python.sqlobject
> 
> Download:
> http://cheeseshop.python.org/pypi/SQLObject/0.8.1
> 
> News and changes:
> http://sqlobject.org/News.html
> 
> 
> What's New
> ==========
> 
> News since 0.8.0
> ----------------
> 
> * Documentation updates
> 
> Small Features
> --------------
> 
> * For MySQLdb 1.2.2+ call ping(True) on the connection to allow
>   autoreconnect after a timeout.
> 
> Bug Fixes
> ---------
> 
> * Another round of changes to create/drop the tables in the right order
>   in the command-line client `sqlobject-admin`.
> 
> * Fixed a bug in UnicodeField - allow comparison with None.
> 
> * ID columns are reverted back from INT UNSIGNED to INT for MySQL to be in
>   accord with FOREIGN KEYs.
> 
> * Fixed return value from Firebird/MaxdbConnection.createTable().
> 
> * Fixed and simplified DatabaseIndex.get().
> 
> * Fixed ConnectionHub.doInTransaction() - close low-level connection on
>   commit() to prevent connections leaking.
> 
> For a more complete list, please see the news:
> http://sqlobject.org/News.html
> 
> Oleg.

WOW!  Went from 0.7.4 to 0.8.1 in the span of only 23 minutes!

-Larry


From claird at lairds.us  Mon Mar 26 11:07:17 2007
From: claird at lairds.us (Cameron Laird)
Date: Mon, 26 Mar 2007 15:07:17 +0000
Subject: Fortran vs Python - Newbie Question
References: <mailman.5628.1174916538.32031.python-list@python.org>
Message-ID: <564ld4-qrv.ln1@lairds.us>

In article <mailman.5628.1174916538.32031.python-list at python.org>,
Jean-Paul Calderone  <exarkun at divmod.com> wrote:
>On 26 Mar 2007 06:20:32 -0700, "Nomad.C at gmail.com" <nomad.c at gmail.com> wrote:
>>OK...
>>I've been told that Both Fortran and Python are easy to read, and are
>
>Python is hugely easier to read.
>
>>quite useful in creating scientific apps for the number crunching, but
>>then Python is a tad slower than Fortran because of its a high level
>
>Fortran is massively faster than Python.
>
>>language nature, so what are the advantages of using Python for
>>creating number crunching apps over Fortran??
>
>You can get the speed of fortran in Python by using libraries like
>Numeric without losing the readability of Python.
>
>Jean-Paul

Me, too.  A lot of language questions are correctly
answered, "Indistinguishable, to within the range
of subjective response."  This is NOT the case for
the readability and performance of Fortran and Python,
though; the differences are as massive as Jean-Paul
says.

HOWEVER, that's all true only in general.  As a new-
comer to both Fortran and Python, there's a fair
chance that the Fortran code you first produce would
be so suboptimal as to perform no better than the
corresponding Python.

My vote, therefore, is this:  unless you're in an
organization that provides a lot of Fortran support
to such beginners as yourself, choose Python.  It 
has all the pertinent advantages.

We can discuss secondary concerns at more length, 
if you wish:  Python's better suited than Fortran
for a range of other applications you might wish to
tackle some day; Python originated from a language-
for-beginners project, and truly is something you
can start to pick up in a day; your own scientific
specialty might be one that's particularly well-
endowed with an existing body of code written in
Fortran (or Python, or C++, or ...); and so on.


From joel.granados at gmail.com  Wed Mar 14 09:01:54 2007
From: joel.granados at gmail.com (Joel Andres Granados)
Date: Wed, 14 Mar 2007 14:01:54 +0100
Subject: Attribute monitoring in a class
In-Reply-To: <45f7d65b$0$23624$426a74cc@news.free.fr>
References: <mailman.5071.1173868190.32031.python-list@python.org>
	<45f7d65b$0$23624$426a74cc@news.free.fr>
Message-ID: <45F7F242.9070002@gmail.com>

Bruno Desthuilliers wrote:
> Joel Andres Granados a ?crit :
>   
>> Hi list:
>>
>> I have googled quite a bit on this matter and I can't seem to find what 
>> I need (I think Im just looking where I'm not suppose to :).  I'm 
>> working with code that is not of my authorship and there is a class 
>> attribute that is changes by directly referencing it (object.attr = 
>> value) instead of using a getter/setter (object.setAttr(Value) ) 
>>     
>
> Which is the right thing to do in Python (I mean : *not* using 
> Java-style getters/setters).
>
>   
>> function.  The thing is that I have no idea when the change occurs and I 
>> would REALLY like to find out.
>> So here comes my question .....
>> Is there a function construct inside a python class that is 
>> automatically called when an attr is changed????
>>     
>
> yes : object.__setattr__(self, name, value)
>
> # example:
> class Class(object):
>     def __init__();
>        self.attr = "whatever"
>
>     def __setattr__(self, name, value):
>        object.__setattr__(self, name, value)
>        if name == 'attr':
>            print "It has changed"
>            # you can also print the call frame,
>            # or set a 'hard' breakpoint here...
>
> obj = Class()
> obj.attr = "other whatever"
>
> *Output:*
> It has changed
>
>   

I used this ^^^^^^^^^^^^^^^ one.  Thank for the help.
Works like a charm.
Regards

> Or you might turn attr into a property:
>
> class Class(object):
>     def __init__();
>        self.attr = "whatever"
>
>     @apply
>     def attr():
>         def fset(self, value):
>             self._attr = value
>             print "It has changed"
>         def fget(self):
>             return self._attr
>         return property(**locals())
>
> But unless you have other needs than simple tracing/debugging, it's 
> probably overkill.
>
> HTH
>   



From patrick.down at gmail.com  Tue Mar 20 13:13:16 2007
From: patrick.down at gmail.com (Patrick Down)
Date: 20 Mar 2007 10:13:16 -0700
Subject: if __name__ == 'main':
In-Reply-To: <1174409383.842776.264350@b75g2000hsg.googlegroups.com>
References: <1174409383.842776.264350@b75g2000hsg.googlegroups.com>
Message-ID: <1174410796.599687.315730@b75g2000hsg.googlegroups.com>

On Mar 20, 11:49 am, "gtb" <goodTweetieB... at hotmail.com> wrote:
> Hi,
>
> I often see the following 'if' construct in python code. What does
> this idiom accomplish? What happens if this is not main? How did I get
> here if it is not main?

A quick example demonstrates the usage:

C:\code>type temp.py


print "Module name is",__name__

if __name__ == "__main__":
    print "I was not imported"
else:
    print "I was imported"

C:\code>python temp.py
Module name is __main__
I was not imported

C:\code>python
Python 2.4.3 (#69, Mar 29 2006, 17:35:34) [MSC v.1310 32 bit (Intel)]
on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import temp
Module name is temp
I was imported




From carl.douglas at gmail.com  Sun Mar  4 20:51:59 2007
From: carl.douglas at gmail.com (Carl Douglas)
Date: Mon, 5 Mar 2007 12:51:59 +1100
Subject: Embedded and extending python 2.5: trouble with __main__ in
	PyRun_SimpleFileExFlags?
In-Reply-To: <6f7c837c0702190251o6e48a4abx7d8309a885deba13@mail.gmail.com>
References: <6f7c837c0702190251o6e48a4abx7d8309a885deba13@mail.gmail.com>
Message-ID: <6f7c837c0703041751s41f9644cl933b083b5ab91ddd@mail.gmail.com>

I am going to answer this question myself, but perhaps this will be
useful for someone else.  My original C++ code was fine, the
PyRun_SimpleFile was failing due to errors in my python code.  To get
a console and display the python interpreter errors I allocated a
console, and redirected stdout and stderr:

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		AllocConsole();
		fpStdOut = freopen( "CONOUT$", "wt", stdout);
		fpStdErr = freopen( "CONOUT$", "wt", stderr);
		fprintf(stdout, "Console opened\n");
		Py_Initialize();
		init_mymodule(); // SWIG generated method
		break;
	case DLL_PROCESS_DETACH:
		fclose(fpStdErr);
		fclose(fpStdOut);
		FreeConsole();
		Py_Finalize();
		break;
	//case DLL_THREAD_ATTACH:
	//case DLL_THREAD_DETACH:
	}
    return TRUE;
}

Then, I can show the Python interpreter errors in the console using
PyErr_Print() in my C++ code:

	// Display the Open dialog box.
	if (GetOpenFileName(&ofn)==TRUE)
	{
		// Thank you:  http://www.ragestorm.net/tutorial?id=21#8
		PyObject* PyFileObject = PyFile_FromString(ofn.lpstrFile, "r");
		if (PyFileObject == NULL)
		{
			PyErr_Print();
			PyErr_Clear();
			return false; // Let the user know the error.
		}

		if (PyRun_SimpleFile(PyFile_AsFile(PyFileObject), ofn.lpstrFile) == -1)
		{
			PyErr_Print();
			PyErr_Clear();
		}

		Py_DECREF(PyFileObject);
	}



On 2/19/07, Carl Douglas <carl.douglas at gmail.com> wrote:
> Hi Python fans,
>
> I am developing a DLL that is loaded by a host application on windows.
>  I'm using python 2.5.
>
> My DLL uses an embedded python interpreter which can access the host
> application through an API which I have exposed using SWIG 1.3.31.
>
> Therefore I have both extended and embedded Python at once: the SWIG
> generated code is statically linked into my DLL, and one of the
> functions in my DLL executes PyRun_SimpleFile.
>
> Using python25_d.dll, I stepped through some python code to understand
> what is happening, and it appears that PyRun_SimpleFile is returning
> -1 because python cannot create the module __main__.
>
> Here's the code from pythonrun.c:
>
> int
> PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit,
>                         PyCompilerFlags *flags)
> {
>         PyObject *m, *d, *v;
>         const char *ext;
>
>         m = PyImport_AddModule("__main__");
>         if (m == NULL)
>                 return -1;
> .
> .
> .
> }
>
> BTW, PyImport_AddModule fails because deeper down a dictionary check fails:
>
>         if (!PyDict_Check(op))
>                 return NULL;
>
>
> Can someone suggest what I need to do to get this to work?
>
> Here are the relevant lines from my code:
>
>         if (GetOpenFileName(&ofn)==TRUE)
>         {
>                 Py_Initialize();
>                 init_mymodule(); // SWIG generated method
>
>                 PyObject* PyFileObject = PyFile_FromString(ofn.lpstrFile, "r");
>
>                 if (PyRun_SimpleFile(PyFile_AsFile(PyFileObject), ofn.lpstrFile)==-1)
>                 {
>                         MessageBox(NULL, "error running script", "Python", MB_ICONERROR);
>                 }
>
>                 Py_DECREF(PyFileObject);
>
>                 Py_Finalize();
>         }
>
> Thanks.
>


From gagsl-py2 at yahoo.com.ar  Sun Mar 11 04:15:46 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 11 Mar 2007 05:15:46 -0300
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
	<7xr6rwhpdb.fsf@ruckus.brouhaha.com>
	<mailman.4922.1173568136.32031.python-list@python.org>
	<7xhcssllyi.fsf@ruckus.brouhaha.com>
	<mailman.4923.1173571172.32031.python-list@python.org>
	<7xslccr6hb.fsf@ruckus.brouhaha.com>
Message-ID: <op.to0mkkcox6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 10 Mar 2007 21:04:00 -0300, Paul Rubin  
<"http://phr.cx"@NOSPAM.invalid> escribi?:

> "Gabriel Genellina" <gagsl-py2 at yahoo.com.ar> writes:
>> > If you use %u you get a very large positive value, not +3.
>> Exactly, and that's the right value. (unsigned int)(-3) isn't +3.
>
> The OP specified that the expected result was 3.

Ouch! Yes, sorry, I overlooked it. And the C code just made things more  
confusing.

-- 
Gabriel Genellina



From olepar at gmail.com  Sat Mar 31 00:15:08 2007
From: olepar at gmail.com (Oleg  Parashchenko)
Date: 30 Mar 2007 21:15:08 -0700
Subject: Long way around UnicodeDecodeError,
	or 'ascii' codec can't decode byte
In-Reply-To: <1175172787.832055.223350@n76g2000hsh.googlegroups.com>
References: <1175142370.740773.190400@e65g2000hsc.googlegroups.com>
	<1175172787.832055.223350@n76g2000hsh.googlegroups.com>
Message-ID: <1175314508.766924.38830@d57g2000hsg.googlegroups.com>

Hello,

On Mar 29, 4:53 pm, "Paul Boddie" <p... at boddie.org.uk> wrote:
> On 29 Mar, 06:26, "Oleg  Parashchenko" <ole... at gmail.com> wrote:
>
> > Hello,
>
> > I'm working on an unicode-aware application. I like to use "print" to
> > debug programs, but in this case it was nightmare. The most popular
> > result of "print" was:
>
> > UnicodeDecodeError: 'ascii' codec can't decode byte 0xXX in position
> > 0: ordinal not in range(128)
>
> What does sys.stdout.encoding say?

'KOI8-R'

>
> > I spent two hours fixing it, and I hope it's done. The solution is one
> > of the ugliest hack I ever written, but it solves the pain. The full
> > story and the code is in my blog:
>
> >http://uucode.com/blog/2007/03/23/shut-up-you-dummy-7-bit-python/
>
> Calling sys.setdefaultencoding might not even help in this case, and
> the consensus is that it may be harmful to your code's portability
> [1].

Yes, but I think UTF-8 is now everywhere.

> Writing output to a terminal may be influenced by your locale,
> but I'm not convinced that going through all the locale settings and
> setting the character set is the best approach (or even the right
> one).
>
> What do you get if you do this...?
>
> import locale
> locale.setlocale(locale.LC_ALL, "")
> print locale.getlocale()

('ru_RU', 'koi8-r')

>
> What is your terminal encoding?

koi8-r

>
> Usually, if I'm wanting to print Unicode objects, I explicitly encode
> them into something I know the terminal will support. The codecs
> module can help with writing Unicode to streams in different
> encodings, too.

As long as input/output is the only place for such need, it's ok to
encode expliciyely. But I also had problems, for example, with md5
module, and I don't know the whole list of potential problematic
places. Therefore, I'd better go with my brutal utf8ization.

>
> Paul
>
> [1]http://groups.google.com/group/comp.lang.python/msg/431017a4cb4bb8ea

--
Oleg Parashchenko  olpa@ http://uucode.com/
http://uucode.com/blog/  Generative Programming, XML, TeX, Scheme
http://tohtml.com/       Online syntax highlighting



From wgwigw at gmail.com  Sat Mar 24 10:01:01 2007
From: wgwigw at gmail.com (momobear)
Date: 24 Mar 2007 07:01:01 -0700
Subject: draw like windows performance Graph
Message-ID: <1174744861.485700.63240@y80g2000hsf.googlegroups.com>

Type the "taskmgr",  Windows performance Graph give a really nice
dynamic history curve, It will be wonderful If I could use the same
kind of graph to represent the network flow in my python program.  Is
there a windows api for this  graph drawing?



From spe.stani.be at gmail.com  Sat Mar  3 18:45:23 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 3 Mar 2007 15:45:23 -0800
Subject: Eric on XP for Newbie
In-Reply-To: <1172745570.273112.268740@s48g2000cws.googlegroups.com>
References: <1172679222.026525.248430@a75g2000cwd.googlegroups.com>
	<1172745570.273112.268740@s48g2000cws.googlegroups.com>
Message-ID: <1172965523.772372.282520@8g2000cwh.googlegroups.com>

On Mar 1, 11:39 am, jeffwatkins2... at gmail.com wrote:
> Thanks guys
>
> Found this on another blog and it seems to work - you need to run theSPE.pyo file ...

Which blog? Can yo point me to the url?

Stani




From nogradi at gmail.com  Sun Mar  4 09:42:07 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sun, 4 Mar 2007 15:42:07 +0100
Subject: Where I could find older python releases ?
In-Reply-To: <1173015920.085918.71760@s48g2000cws.googlegroups.com>
References: <mailman.4645.1173002306.32031.python-list@python.org>
	<1173015920.085918.71760@s48g2000cws.googlegroups.com>
Message-ID: <5f56302b0703040642y5fed77a5ld6ed496f99c399b3@mail.gmail.com>

> Sorry jumped the gun a little there. Is this what you are looking for?
> http://codespeak.net/download/py/py-0.9.0.zip

Probably not, the OP is looking for a python distribution, what you
are posting is a third party package *for* python and is actually a
part of the pypy project.


From mail at timgolden.me.uk  Thu Mar 29 10:05:25 2007
From: mail at timgolden.me.uk (Tim Golden)
Date: Thu, 29 Mar 2007 15:05:25 +0100
Subject: Finding User Profile path
In-Reply-To: <1175175904.199745.81460@y80g2000hsf.googlegroups.com>
References: <1175116080.934888.171450@n76g2000hsh.googlegroups.com>	<mailman.5745.1175154506.32031.python-list@python.org>	<1175173141.277735.192020@o5g2000hsb.googlegroups.com>	<mailman.5755.1175174512.32031.python-list@python.org>
	<1175175904.199745.81460@y80g2000hsf.googlegroups.com>
Message-ID: <460BC7A5.8070904@timgolden.me.uk>

kyosohma at gmail.com wrote:
> On Mar 29, 8:23 am, Tim Golden <m... at timgolden.me.uk> wrote:
>> kyoso... at gmail.com wrote:
>>> One of my co-workers thought I could do
>>> something like this:
>>> c = wmi.WMI()
>>> for i in c.Win32_UserAccount(Name=user):
>>>     # Get user paths somehow.
>>> I messed around with that, but I think he was mistaken. It has lots of
>>> good info, but not what I need.
>>> I apologize for not being specific. I will look at those win32net
>>> functions.
>>> Mike
>> Might depend on what you mean by "profile" but would the
>> users' homeDirectory/homeDrive active directory attributes
>> or the profilePath be of use here? If so, they're fairly
>> easy to get hold of.
>>
>> TJG
> 
> Yes. It's the homeDirectory as you say. Once again the IT community's
> use of multiple terms for the same thing has bitten me.

I take it you're OK for getting things out of AD?

TJG


From wgwigw at gmail.com  Mon Mar 19 03:37:38 2007
From: wgwigw at gmail.com (momobear)
Date: 19 Mar 2007 00:37:38 -0700
Subject: any ways to judge whether an object is initilized or not in a class
Message-ID: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>

hi, I am puzzled about how to determine whether an object is
initilized in one class, anyone could give me any instructions?
here is an example code:

class coffee:
         def  boil(self):
               self.temp = 80

a = coffer()
if a.temp > 60:
     print "it's boiled"

in C++ language we must initilized a variable first, so there is no
such problem, but in python if we don't invoke a.boil(), we will not
get self.temp to be initilized, any way to determine if it's initilzed
before self.temp be used.



From sturlamolden at yahoo.no  Mon Mar 26 18:53:56 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 26 Mar 2007 15:53:56 -0700
Subject: Fortran vs Python - Newbie Question
In-Reply-To: <1174929184.645992.61310@y66g2000hsf.googlegroups.com>
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<4607fbf4$1@nntp.zianet.com>
	<1174929184.645992.61310@y66g2000hsf.googlegroups.com>
Message-ID: <1174949636.284743.251680@n59g2000hsh.googlegroups.com>

On Mar 26, 7:13 pm, "Noma... at gmail.com" <Noma... at gmail.com> wrote:

> Thanks you all for giving a little insight into what Python can
> actually do, I think I've read enough to convince me that Python is
> generally a very flexible, fast, powerful language that can be used in
> a wide variety of applications instead of focusing on numerical
> functions like fortran does.

I wouldn't go as far as to say Python is a 'fast' language. But it's
certainly fun (particularly that), powerful, readable, and useful,
even for numerical computing.

Speed in numerical computing is a strange beast. First, a small
bottleneck in your code is likely to dominate the execution time. But
very often it is impossible to guess where it is, common sense usually
doesn't help, for some strange reason. You can use the Python profiler
to identify the real bottlenecks, but you may be surprised when you
find where they are. These bottlenecks are the only portion of the
code that can benefit from being moved to Fortran or C. The
bottlenecks will dominate regardless of what you do to the rest of you
code.

You may gain nothing from moving the bottlenecks to C or Fortran.
Don't let that surprise you. Python may be doing the work as fast as
it can be done. It may actually be the case that moving this code to C
or Fortran causes a slowdown. Python may be calling hand tuned C,
assembly or Fortran code that you cannot match. You can hand code a
sorting routine in C, but will you be able to beat Python's 'timsort'?
Probably not! Timsort is one of the fastest and stable sorting
routines known to man. It has taken years to develop and fine tune,
and you simply cannot beat that, even if you spend hours on end
optimizing your code. The same holds for the hashing routines in
Pythons dictionaries. You can write a hashtable in C, but I doubt it
can match the speed of Python's dictionaries. And then there is files,
strings, network sockets and protocols, access to databases,
encryption, etc. Python's libraries are tuned by people who knew what
they were doing and had the time to do the fiddling. Most likely you
don't (well, I certainly do not). Finally, you will most likely use
numerical libraries like LAPACK and BLAS. These are written in Fortran
or C anyway. Whether you call the libraries from Fortran or Python may
not matter very much! In the end, the code that can really benefit
from being moved to C or Fortran is rare to come by.

Python is a very high-level language. That means there are certain
things that put constraint on the attained speed. Most importantly:
keep the number of interpreter evals as scarce as possible. If you
make a for loop, the interpreter may evaluate the lines within the
loop several times. Languages like C, C++ and Java really teach you
bad habits when it comes to an interpreted language like Python. In
these languages, loops are almost free. In Python, they may be very
expensive as the interpreter is invoked multiple times. But if you can
'vectorize' the loop statement into a one-liner (or a few lines) using
slicing, list comprehensions or functional programming (e.g. the
lambda, map and filter intrinsics), the overhead will be very small.
That is the secret to getting high-performance from a language like
Python. If you can get away from the C++ habit of using for loops for
any kind of iteration, Python may not feel sluggish at all.

In the end, the main determinant of performance in numerical tasks is
really big-O, not the language you prefer to use. Choice of algorithm
is fare more important than the Python vs. Fortran issue!



From michael at jedimindworks.com  Sun Mar 25 02:52:12 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Sun, 25 Mar 2007 01:52:12 -0500
Subject: Join strings - very simple Q.
In-Reply-To: <pJoNh.14855$PL.14283@newsread4.news.pas.earthlink.net>
References: <1174675011.244339@jubilee.claranet.pt><1174680929.492601.140270@o5g2000hsb.googlegroups.com>
	<pan.2007.03.24.03.22.09.963233@REMOVE.THIS.cybersource.com.au>
	<mailman.5576.1174800630.32031.python-list@python.org>
	<pJoNh.14855$PL.14283@newsread4.news.pas.earthlink.net>
Message-ID: <513C0416-14FE-4514-95E2-D7BC7CFC06D6@jedimindworks.com>


On Mar 25, 2007, at 6:33 AM, Dennis Lee Bieber wrote:

> On Sat, 24 Mar 2007 10:53:20 +0200, "Hendrik van Rooyen"
> <mail at microcorp.co.za> declaimed the following in comp.lang.python:
>
>>
>> What happened in 1850 to make it the demarcation line?
>>
> 	Well... The Modified Julian Date zero is 17 November 1858

American Express is founded by Henry Wells & William Fargo on 18  
March 1850?



From tjreedy at udel.edu  Sat Mar 17 04:32:03 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 17 Mar 2007 04:32:03 -0400
Subject: Weekly Python Patch/Bug Summary
References: <200703170454.l2H4skKe003172@bayview.thirdcreek.com>
	<20070317075121.565D11E4005@bag.python.org>
Message-ID: <etg921$9kt$1@sea.gmane.org>


"Dick Moores" <rdm at rcblue.com> wrote in message 
news:20070317075121.565D11E4005 at bag.python.org...
| May I ask a dumb question here? It isn't clear to me what to do with 
these patches. For most of them there is something like, "Committed as 
r54386 and r54387". I'm familiar with updating the editor Ulipad to the 
latest revision, using software such as TortoiseSVN and RapidSVN. Is that 
what is meant? And if so, what's the URL of the trunk?
---------

Yes, those are svn revision numbers.  Start at svn.python.org.

Most people ignore the patches.  Some look at them to know what to expect 
in the next releases.  A few download to a local svn repository either to 
work on the code or build a bleeding edge python to test with their code. 
Good luck.

tjr





From vinjvinj at gmail.com  Wed Mar 14 10:54:08 2007
From: vinjvinj at gmail.com (vj)
Date: 14 Mar 2007 07:54:08 -0700
Subject: Questions on migrating from Numeric/Scipy to Numpy
In-Reply-To: <mailman.5055.1173842430.32031.python-list@python.org>
References: <1173835370.353415.8000@e1g2000hsg.googlegroups.com>
	<mailman.5051.1173838059.32031.python-list@python.org>
	<1173841694.932998.290390@d57g2000hsg.googlegroups.com>
	<mailman.5055.1173842430.32031.python-list@python.org>
Message-ID: <1173884048.683423.39750@o5g2000hsb.googlegroups.com>

What should I be using to replace Numeric/arrayobject.h:

numpy/arrayobject.h

or

numpy/oldnumeric.h

Thanks,

VJ



From oliver at obeattie.com  Sat Mar 31 10:12:24 2007
From: oliver at obeattie.com (oliver at obeattie.com)
Date: 31 Mar 2007 07:12:24 -0700
Subject: Opening Photoshop EPS with PIL?
Message-ID: <1175350344.418087.288320@q75g2000hsh.googlegroups.com>

Hey Everyone,

I am trying to get PIL to open some EPS files I have (Photoshop EPS,
whatever the difference is). I'm trying to use PIL to do this, but
when I run it, the following happens:

>>> from PIL import Image, ImageOps
>>> Image.open('/flora.eps')
Traceback (most recent call last):
  File "<console>", line 1, in ?
  File "/opt/local/lib/python2.4/site-packages/PIL/Image.py", line
1741, in open
    return factory(fp, filename)
  File "/opt/local/lib/python2.4/site-packages/PIL/ImageFile.py", line
82, in __init__
    self._open()
  File "/opt/local/lib/python2.4/site-packages/PIL/EpsImagePlugin.py",
line 206, in _open
    raise IOError, "bad EPS header"

I've never had any real trouble with PIL before (never used it for EPS
though). Can anyone offer any advice on this one? I'd be most
grateful.

Many Thanks Everyone,
Oliver Beattie



From dnwurtz at gmail.com  Mon Mar  5 14:28:52 2007
From: dnwurtz at gmail.com (dnwurtz at gmail.com)
Date: 5 Mar 2007 11:28:52 -0800
Subject: New to Python
In-Reply-To: <1173122096.762869.16920@64g2000cwx.googlegroups.com>
References: <1173119634.739433.240520@s48g2000cws.googlegroups.com>
	<1173122096.762869.16920@64g2000cwx.googlegroups.com>
Message-ID: <1173122931.113795.282800@p10g2000cwp.googlegroups.com>

On Mar 5, 1:14 pm, "Arnaud Delobelle" <arno... at googlemail.com> wrote:
> On Mar 5, 6:33 pm, "dnwu... at gmail.com" <dnwu... at gmail.com> wrote:
>
>
>
>
>
> > I am trying to get a program to add up input from the user to get to
> > the number 100 using a loop.  However, I am having some issues.  Here
> > is what I have so far.  I know I am just trying to hard, but I am
> > stuck.  Thank you for any help.
>
> > print "We need to count to 100"
>
> > high_number = 100
> > total = 0
>
> > number = input("Enter your first number ")
> > sum = number + total
> > while sum < high_number:
> >     print "Not there yet..."
> >     number = input("Enter another number ")
>
> > print "We are there!!!"
>
> There is no need for 'sum' and 'total'. Here's a working version of
> your program.  Look at the differences with your attempt.
>
> ----------
> print "We need to count to 100"
>
> high_number = 100
>
> total = input("Enter your first number ") # first total is the fist
> number
> while total < high_number:
>     print "Not there yet..."
>     number = input("Enter another number ")
>     total = total + number # Add the new number to the total
>
> print "We are there!!!"
> ----------
>
> Good luck !
>
> As others have pointed out, 'input' is a function to be careful with.
> You could use answer=raw_input(...) and then convert the result to an
> int by using number=int(answer).
>
> --
> Arnaud- Hide quoted text -
>
> - Show quoted text -


Thanks for the help guys!!!

Before I got a chance to read your answer Arnaud, I came up with the
below.  Seems to work also.  Yours is easier :).

print "We need to count to 100"

high_number = 100
sum = 0

sum += input("Enter your first number ")
print sum
while sum < high_number:
    print "Not there yet..."
    sum += input("Enter another number ")
    print sum

print "We are there!!!"



From tiedon_jano at hotmail.com  Thu Mar  1 13:05:54 2007
From: tiedon_jano at hotmail.com (Jussi Salmela)
Date: Thu, 01 Mar 2007 18:05:54 GMT
Subject: Lists: Converting Double to Single
In-Reply-To: <Xns98E55E112CCC7duncanbooth@127.0.0.1>
References: <slrneu70bs.hjp.rshepard@salmo.appl-ecosys.com>
	<%6QEh.6362$_73.1862@newsread2.news.pas.earthlink.net>
	<Xns98E466D3B2D45duncanbooth@127.0.0.1>
	<pan.2007.02.27.14.58.37.581918@REMOVE.THIS.cybersource.com.au>
	<Xns98E4C016371BDduncanbooth@127.0.0.1>
	<Cn9Fh.7289$tD2.3125@newsread1.news.pas.earthlink.net>
	<Xns98E55E112CCC7duncanbooth@127.0.0.1>
Message-ID: <6CEFh.220$HB5.16@read3.inet.fi>

Duncan Booth kirjoitti:
> Dennis Lee Bieber <wlfraed at ix.netcom.com> wrote:
> 
>>      For floating point, smallest magnitude to largest IS the most
>> precise.
>>
>>      Pretend you only have 2 significant digits of precision...
>>
>>      10 + 0.4 + 0.4 + 0.4 => 10
>>
>>      0.4 + 0.4 + 0.4 + 10 => 11
> 
> and if you try the way I suggested then initial input order doesn't 
> matter:
> 
>    (10 + 0.4) = 10, (0.4 + 0.4) = 0.8, (10 + 0.8) = 11
>    (0.4 + 0.4) = 0.8, (10 + 0.4) = 10, (0.8 + 10) = 11
> 
> 
> Pretend you ran the example code I posted. Specifically the bit where 
> the output is:
> 
> all the same
> builtin sum  1000000.0000016732
> pairwise sum 1000000.00001
> 
> It isn't so much the order of the initial values that matters 
> (especially if the values are all similar). What *really* matters is 
> keeping the magnitude of the intermediate results as small as possible. 
> 
> Summing in pairs ensures that you keep the precision as long as 
> possible. The order of the initial values is less important than this 
> (although it does still have a minor effect). For a solution which works 
> with a sequence of unknown length and doesn't require lookahead I don't 
> think you can do much better than that.
> 
> BTW, in case someone thinks my example numbers are a bit too weird you 
> can show the same problem averaging a list of 10 digit floating point 
> numbers with exact representations:
> 
> v = [9999999999.] * 10000000
> print "builtin sum ", (sum(v)/len(v))
> print "pairwise sum", (sumpairs(v)/len(v))
> 
> 
> gives:
> builtin sum  9999999999.91
> pairwise sum 9999999999.0
> 
> In both cases the total is large enough to go beyond the range of 
> integers that can be expressed exactly in floating point and as soon as 
> that happens the builtin sum loses precision on every subsequent 
> addition. pairwise summation only loses precision on a very few of the 
> additions.
> 
> P.S. Apologies for the sloppy coding in the sumpairs function. It should 
> of course do the final addition manually otherwise it is going to give 
> odd results summing lists or strings or anything else where the order 
> matters. Revised version:
> 
> def sumpairs(seq):
>     tmp = []
>     for i,v in enumerate(seq):
>         if i&1:
>             tmp[-1] += v
>             i = i + 1
>             n = i & -i
>             while n > 2:
>                 t = tmp.pop(-1)
>                 tmp[-1] = tmp[-1] + t
>                 n >>= 1
>         else:
>             tmp.append(v)
> 
>     while len(tmp) > 1:
>         t = tmp.pop(-1)
>         tmp[-1] = tmp[-1] + t
>     return tmp[0]
> 
> 

Warning: I'm no floating point guru! Awfully long post following!

I've run a couple of tests and it seems to me that Dennis Lee Bieber is 
  on the trail of the truth when he claims that smallest magnitude to 
the largest is the way to do the summation. Actually it isn't THE way 
although it diminishes the error. I was sort of astonished because I 
also had somewhere along the years formed the same notion as Dennis.

"Your" pairwise method beats the former method by a large margin 
although I don't understand why. To tell you the truth: I started out to 
show you were wrong because intuitively (for me at least) the former 
method should work better than yours.

I also found a method called "Kahan summation algorithm" which probably 
is the best way to do this.

What have I done then? I used your examples and code and added a 
straight summation and the Kahan method using the pseudocode presented 
in the Wikipedia article. I also made an experiment using randomized 
floats merged wildly into a crazy list.

The results (as I interpret them):
1. The straight summation is the same method that the builtin sum uses 
because their results are equal(ly poor).
2. Sorting to increasing order helps these two methods to have better 
accuracy.
3. The pairwise method is almost as good as the Kahan method.

Here's the code and the results:

=========================================================================
CODE:
=========================================================================
import random

def sumpairs(seq):
     tmp = []
     for i,v in enumerate(seq):
         if i&1:
             tmp[-1] += v
             i = i + 1
             n = i & -i
             while n > 2:
                 t = tmp.pop(-1)
                 tmp[-1] = tmp[-1] + t
                 n >>= 1
         else:
             tmp.append(v)

     while len(tmp) > 1:
         t = tmp.pop(-1)
         tmp[-1] = tmp[-1] + t
     return tmp[0]

def straightSum(seq):
     result = 0.0
     for elem in seq: result += elem
     return result

def kahanSum(input):
     sum = input[0]
     n = len(input)
     c = 0.0                 # A running compensation for lost low-order 
bits.
     for i in range(1, n):
         y = input[i] - c    # So far, so good: c is zero.
         t = sum + y         # Alas, sum is big, y small,
                             # so low-order digits of y are lost.
         c = (t - sum) - y   # (t - sum) recovers the high-order part of y;
                             # subtracting y recovers -(low part of y)
         sum = t             # Algebraically, c should always be zero.
                             # Beware eagerly optimising compilers!
         continue            # Next time around, the lost low part will be
                             # added to y in a fresh attempt.
     return sum

print '\n======================> v = [1000000, 0.00001] * 1000000'
v = [1000000, 0.00001] * 1000000
print "CORRECT ", '500000.000005         <========'
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print "sorted"
v.sort()
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print "reverse sorted"
v.reverse()
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print '\n======================> v = [1000000]*1000000 + [0.00001]*1000000'
v = [1000000]*1000000 + [0.00001]*1000000
print "CORRECT ", '500000.000005         <========'
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print '\n======================> v = [0.00001]*1000000 + [1000000]*1000000'
v = [0.00001]*1000000 + [1000000]*1000000
print "CORRECT ", '500000.000005         <========'
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print '\n======================> v = [1000000.00001] * 1000000'
v = [1000000.00001] * 1000000
print "CORRECT ", '1000000.00001         <========'
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print '\n======================> Randomized lists'
print '========> lst1 = [random.random() for i in range(1000000)]'
print '========> lst2 = [1000000*random.random() for i in range(1000000)]'
N = 100000
lst1 = [random.random() for i in range(N)]
lst2 = [1000000.0 + random.random() for i in range(N)]
v = []
for i in range(N):
     v.append(lst1[i])
     v.append(lst2[i])
     v.append(lst2[i])
     v.append(lst2[i])
     v.append(lst1[i])
     v.append(lst2[i])
     v.append(lst2[i])
     v.append(lst2[i])
     v.append(lst2[i])
print '========> v = "Crazy merge of lst1 and lst2'
print 'min, max'
print 'lst1:', min(lst1), max(lst1)
print 'lst2:', min(lst2), max(lst2)
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print "sorted"
v.sort()
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))

print "reverse sorted"
v.reverse()
print "builtin ", repr(sum(v)/len(v))
print "straight", repr(straightSum(v)/len(v))
print "pairwise", repr(sumpairs(v)/len(v))
print "Kahan   ", repr(kahanSum(v)/len(v))
=========================================================================
RESULTS:
=========================================================================

======================> v = [1000000, 0.00001] * 1000000
CORRECT  500000.000005         <========
builtin  500000.00000083662
straight 500000.00000083662
pairwise 500000.00000499998
Kahan    500000.00000499998
sorted
builtin  500000.00000499998
straight 500000.00000499998
pairwise 500000.00000499998
Kahan    500000.00000499998
reverse sorted
builtin  500000.0
straight 500000.0
pairwise 500000.00000500004
Kahan    500000.00000499998

======================> v = [1000000]*1000000 + [0.00001]*1000000
CORRECT  500000.000005         <========
builtin  500000.0
straight 500000.0
pairwise 500000.00000500004
Kahan    500000.00000499998

======================> v = [0.00001]*1000000 + [1000000]*1000000
CORRECT  500000.000005         <========
builtin  500000.00000499998
straight 500000.00000499998
pairwise 500000.00000499998
Kahan    500000.00000499998

======================> v = [1000000.00001] * 1000000
CORRECT  1000000.00001         <========
builtin  1000000.0000016732
straight 1000000.0000016732
pairwise 1000000.00001
Kahan    1000000.00001

======================> Randomized lists
========> lst1 = [random.random() for i in range(1000000)]
========> lst2 = [1000000*random.random() for i in range(1000000)]
========> v = "Crazy merge of lst1 and lst2
min, max
lst1: 1.59494420963e-005 0.999990993581
lst2: 1000000.00001 1000001.0
builtin  777778.27774196747
straight 777778.27774196747
pairwise 777778.27774199261
Kahan    777778.27774199261
sorted
builtin  777778.2777420698
straight 777778.2777420698
pairwise 777778.27774199261
Kahan    777778.27774199261
reverse sorted
builtin  777778.27774202416
straight 777778.27774202416
pairwise 777778.27774199261
Kahan    777778.27774199261
=========================================================================


Cheers,
Jussi


From http  Sat Mar 10 14:26:08 2007
From: http (Paul Rubin)
Date: 10 Mar 2007 11:26:08 -0800
Subject: unsigned integer?
References: <I9Kdndp49PJLdm_YnZ2dnUVZ_t-mnZ2d@comcast.com>
Message-ID: <7xr6rwhpdb.fsf@ruckus.brouhaha.com>

"Jack" <nospam at invalid.com> writes:
> Also, if I have an int, I can convert it to unsigned int in C:
>    int i = -3;
>    int ui = (unsigned int)i;

I just tried it:

    main() {
      int i = -3;
      unsigned int ui = i;
      printf("%d\n", ui);
    }

prints -3.  What do you want the conversion to do?  If you want
the absolute value, use abs().


From bayer.justin at googlemail.com  Thu Mar  1 04:35:05 2007
From: bayer.justin at googlemail.com (bayer.justin at googlemail.com)
Date: 1 Mar 2007 01:35:05 -0800
Subject: Dialog with a process via subprocess.Popen blocks forever
In-Reply-To: <mailman.4554.1172731034.32031.python-list@python.org>
References: <1172698063.670659.318340@k78g2000cwa.googlegroups.com>
	<mailman.4554.1172731034.32031.python-list@python.org>
Message-ID: <1172741705.054546.188890@m58g2000cwm.googlegroups.com>

Hi,

Thanks for your answer. I had a look into the fcntl module and tried
to unlock the output-file, but

>>> fcntl.lockf(x.stdout, fcntl.LOCK_UN)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IOError: [Errno 9] Bad file descriptor

I wonder why it does work with the sys.stdin It's really a pity, it's
the first time python does not work as expected. =/

Flushing the stdin did not help, too.

Regards,
-Justin



From chris.cavalaria at free.fr  Tue Mar 20 10:05:03 2007
From: chris.cavalaria at free.fr (Christophe)
Date: Tue, 20 Mar 2007 15:05:03 +0100
Subject: python QT or python-GTK
In-Reply-To: <CFkLh.128940$_73.66143@newsread2.news.pas.earthlink.net>
References: <45fdb561$0$17201$4c368faf@roadrunner.com>
	<CFkLh.128940$_73.66143@newsread2.news.pas.earthlink.net>
Message-ID: <45ffea0f$0$32003$426a74cc@news.free.fr>

Dennis Lee Bieber a ?crit :
> 	Not enough experience here... I do know I never liked applications
> targeted to the "Gnome" look, preferring KDE... So... which toolkit did
> those desktops favor?
> 
> 	wxWidgets, as I recall, is supposed to attempt to look "native" on
> each OS.

Well, wxWidgets targets the Gnome look ( it means it uses GTK on Linux ) 
and not the KDE look so I guess you wouldn't like wxWidgets either :)


From tew24 at spam.ac.uk  Wed Mar 21 11:03:17 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 15:03:17 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
Message-ID: <etrhfo$bv3$1@gemini.csx.cam.ac.uk>

skip at pobox.com wrote:
> You haven't forgotten to do anything.  Your attempts at freeing memory are
> being thwarted (in part, at least) by Python's int free list.  I believe
> the int free list remains after the 10M individual ints' refcounts drop to
> zero. The large storage for the list is grabbed in one gulp and thus
> mmap()d I believe, so it is reclaimed by being munmap()d, hence the drop
> from 320+MB to 250+MB.
> 
> I haven't looked at the int free list or obmalloc implementations in
> awhile, but if the free list does return any of its memory to the system
> it probably just calls the free() library function.  Whether or not the
> system actually reclaims any memory from your process is dependent on the
> details of themalloc/free implementation's details.  That is, the behavior
> is outside Python's control.

Ah, thanks for explaining that.  I'm a little wiser about memory allocation
now, but am still having problems reclaiming memory from unused objects
within Python.  If I do the following:

>>>
(memory use: 15 MB)
>>> a = range(int(4e7))
(memory use: 1256 MB)
>>> a = None
(memory use: 953 MB)

...and then I allocate a lot of memory in another process (eg. open a load
of files in the GIMP), then the computer swaps the Python process out to
disk to free up the necessary space.  Python's memory use is still reported
as 953 MB, even though nothing like that amount of space is needed.  From
what you said above, the problem is in the underlying C libraries, but is
there anything I can do to get that memory back without closing Python?

-- 
I'm at CAMbridge, not SPAMbridge


From tjreedy at udel.edu  Sat Mar 10 22:27:56 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 10 Mar 2007 22:27:56 -0500
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com><7x7itqqxlh.fsf@ruckus.brouhaha.com><1173453432.893222.308610@j27g2000cwj.googlegroups.com><pan.2007.03.09.15.32.01.112493@gmx.net><1173515984.515050.27400@n33g2000cwc.googlegroups.com>	<esukru$1v1$1@news2.zwoll1.ov.home.nl><mailman.4919.1173560418.32031.python-list@python.org>
	<esvepk$1cu$1@news3.zwoll1.ov.home.nl>
Message-ID: <esvsvp$p6h$1@sea.gmane.org>


"Anton Vredegoor" <anton.vredegoor at gmail.com> wrote in message 
news:esvepk$1cu$1 at news3.zwoll1.ov.home.nl...
| Terry Reedy wrote:
|
| > Partitioning positive count m into n positive counts that sum to m is a
| > standard combinatorial problem at least 300 years old.  The number of 
such
| > partitions, P(m,n)  has no known exact formula but can be computed
| > inductively rather easily.  The partitions for m and n can be ranked in
| > lexicographic order from 0 to P(m,n)-1.  Given a rank r in that range, 
one
| > can calculate the particular partition that has that rank.  So a
| > equi-probable random count in the range can be turned into a 
equi-probable
| > random partition.
|
| Yes that was one of my first ideas too. But later on Steven pointed out
| that one can view the problem like this:
|
| 00010000100010100
|
| That would be [3,4,3,1,2]
|
| where the '1' elements are like dividing shutters that partition the row
| of '0'. This means that the problem is reduced to permutations (albeit

If any of the 1s appear at the ends or together, then you would have 0s in 
the partition, which is not allowed, as I understood the spec.

| unique permutations) which are a lot simpler to compute than partitions.

I think the simplicity is actually about the same.

Terry Jan Reedy





From martinunsal at gmail.com  Tue Mar  6 12:09:13 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 09:09:13 -0800
Subject: Project organization and import
In-Reply-To: <mailman.4716.1173190042.32031.python-list@python.org>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<mailman.4689.1173121575.32031.python-list@python.org>
	<1173166500.640781.252520@t69g2000cwt.googlegroups.com>
	<mailman.4716.1173190042.32031.python-list@python.org>
Message-ID: <1173200953.714165.157200@h3g2000cwc.googlegroups.com>

On Mar 6, 6:07 am, "Chris Mellon" <arka... at gmail.com> wrote:
> Because you're advocating single class per file.

What I actually said was "Smallest practical functional block." I
never said one class per file, in fact I generally have more than one
class per file. Nonetheless I frequently have a class which has the
same name as the file it's contained in, which is where I start having
trouble.

> What you said was  A scan through the
> standard library may be instructive, where there are some modules that
> expose a single class (StringIO, pprint) and others that expose many,
> and some that expose none at all.

AHA! Here we see the insidious Python package system at work! ;)

I said "file" and you assume that I am talking about the exposed
namespace. Files should not have to be isomorphic with namespace! A
package that exposes many classes may still use one class per file if
it wants to.

> In any
> case, as I hinted at, I prefer an organic, developer driven approach
> to deciding these things, not handed down from above style guidelines.

PRECISELY. And in the case of Python, package stucture is dictated,
not by a style guideline, but by the design flaws of Python's package
system.

Martin



From hollandlucas at gmail.com  Sat Mar 24 11:20:08 2007
From: hollandlucas at gmail.com (hollandlucas at gmail.com)
Date: 24 Mar 2007 08:20:08 -0700
Subject: Problem with game
In-Reply-To: <1174749546.133947.232800@y80g2000hsf.googlegroups.com>
References: <1174749546.133947.232800@y80g2000hsf.googlegroups.com>
Message-ID: <1174749608.681416.243020@o5g2000hsb.googlegroups.com>

>  File "Python-episode12-Zahlenraten.py", line 15
>     print "Die eingegebene Zahl ist kleiner als die generierte Zahl."
IndentationError: expected an indented block





From deets at nospam.web.de  Mon Mar 19 06:54:11 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Mon, 19 Mar 2007 11:54:11 +0100
Subject: Building several parsing modules
References: <ljcrv25n8d5n778ago8ejdugoej4422lti@4ax.com>
Message-ID: <5678ejF2743atU3@mid.uni-berlin.de>

Robert Neville wrote:

> Basically, I want to create a table in html, xml, or xslt; with any
> number of regular expressions; a script (Perl or Python) which reads
> each table row (regex and replacement); and performs the replacement
> on any file name, folder, or text file (e.g. css, php, html).  For
> example, I often rename my mp3 (files); the folder holding the mp3
> files; and replace these renamed values in a playlist/m3u/xml file.

<snip/>

Don't do it. Just write python for the task at hand - if it involves regular
expressions, use the re module if you must, but lots of stuff can be done
with simpler, less confusing means like string.split and the like.

The result should be a small few-liner. You are way better off with that,
especially when you have to take constraints into account like moon phase
or the like - you then have the full power of python at your hand, instead
of inventing some wicked table-based "language" that you code exceptions
into.

Diez


From dbraband at gmail.com  Thu Mar  8 08:02:52 2007
From: dbraband at gmail.com (Danilo)
Date: 8 Mar 2007 05:02:52 -0800
Subject: Configuration: Apache + mod_python
In-Reply-To: <1173352699.270216.48800@s48g2000cws.googlegroups.com>
References: <1173351023.866426.51000@t69g2000cwt.googlegroups.com>
	<1173352699.270216.48800@s48g2000cws.googlegroups.com>
Message-ID: <1173358972.661607.38290@t69g2000cwt.googlegroups.com>

On 8 Mrz., 12:18, Graham.Dumple... at gmail.com wrote:
> On Mar 8, 9:50 pm, "Danilo" <dbrab... at gmail.com> wrote:
>
> > Hi there,
>
> > is it possible to create a rewrite rule to send every server-request
> > to the directory /py? But only if the file does not exists on the
> > server.
>
> > This is my mod_python section of the apache config-file.
>
> > <Location "/py">
> >         SetHandler python-program
> >         PythonHandler django.core.handlers.modpython
> >         PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
> >         SetEnv DJANGO_SETTINGS_MODULE myapp.settings
> >         PythonDebug Off
> > </Location>
>
> For the more general case of where a HTTP 404 error would otherwise be
> returned, indicating that a resource could not be found, as opposed to
> an actual physical file, you can just use:
>
>   ErrorDocument 404 /py
>
> This would be simpler than using mod_rewrite. I can't remember though
> whether the handler when triggered in this case can change the
> response status to something other than 404.
>
> You could use mod_rewrite if you really must, but not sure how it
> would interact with virtual resources managed by some handler where no
> actual file exists. To be practical you would probably want to
> restrict the scope of mod_rewrite to specific contexts.
>
> Quoting an example from very good book "The Definitive Guide to Apache
> mod_rewrite", you can do something similar to:
>
>   RewriteEngine On
>   # If its not here ...
>   RewriteCond %{REQUEST_FILENAME} !-f
>   RewriteCond %{REQUEST_FILENAME} !-d
>   # Look here instead ...
>   RewriteRule ^/images/(.*) /pics/$1 [PT]
>
> In this case it is causing lookups for images to be made in two
> places, but your case wouldn't be much different.
>
> Graham

The rewrite rule works, but now every request ist send to /py.
This is my .conf:

<VirtualHost *>
	DocumentRoot /var/www/mydomain.com/htdocs
	ServerName mydomain.com
	ServerAlias www.mydomain.com

	<Location "/py">
		SetHandler python-program
		PythonHandler django.core.handlers.modpython
		PythonPath "['/var/www/mydomain.com/htdocs/py'] + sys.path"
		SetEnv DJANGO_SETTINGS_MODULE myapp.settings
		PythonDebug Off
	</Location>

	RewriteEngine On
	# If its not here...
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteCond %{REQUEST_FILENAME} !-d
	# Look here instead...
	RewriteRule (.*) /py$1 [PT]

	ErrorLog /var/www/mydomain.com/logs/error.log
	CustomLog /var/www/mydomain.com/logs/access.log common
</VirtualHost>

Any ideas what is wrong?



From cjw at sympatico.ca  Tue Mar 13 15:40:37 2007
From: cjw at sympatico.ca (Colin J. Williams)
Date: Tue, 13 Mar 2007 15:40:37 -0400
Subject: help developing an editor to view openoffice files.
In-Reply-To: <et6g05$4av$1$8300dec7@news.demon.co.uk>
References: <mailman.5005.1173770157.32031.python-list@python.org>
	<et6g05$4av$1$8300dec7@news.demon.co.uk>
Message-ID: <et6unr$fd7$1@sea.gmane.org>

Ken Starks wrote:
> krishnakant Mane wrote:
>> hello,
>> right now I am involved on doing a very important accessibility work.
>> as many people may or may not know that I am a visually handicap
>> person and work a lot on accessibility.  the main issue at hand is to
>> create an accessible editor for open office.
>> there are a lot of things remaining on that front.
>> so right now I am trying to find out a temporary work around by
>> creating a simple accessible editor (with wxpython) for viewing and
>> editing open office files.
>> I know there must be python libraries that can open/ save .odt files
>> because it is an open standard any ways.
>> but I am trying to work out a kind of a program where those files can
>> also be displayed in a text area with all the formatting.
>> probably one way of doing it is to use some thing like a rich text
>> editor and allow the file to be converted to rtf from odt for viewing
>> and back again to odt when the user wishes to save it.
>> another way I find is to actually find out if there is a odt text box
>> that can display these files as they are.
>> viewing the contents of the files in an editable way is most important.
>> any suggestions?
>> regards.
>> Krishnakant.
> 
> There is an O'Reilly Book about hacking the Open Office Format, and
> it is available free on line in both html and pdf.
More expensive but well reviewed is:
 
http://www.amazon.com/gp/product/customer-reviews/013148205X/ref=cm_cr_dp_pt/103-7133293-6391046?ie=UTF8&n=283155&s=books

Colin W.
> 
> Open office files are a variation on 'Zipped' archives and
> many unzip tools can be used to open them, apart from ones
> that insist on a .zip extension. These include python tools.
> 
> The one 'case study' in the book that uses python is actually for
> a spreadsheet, but that makes little difference to the
> 'unzipping' part.  You can find it at:
> 
> http://books.evc-cit.info/odbook/ch05.html#modify-spreadsheet-section
> 
> Once you have the raw XML you should be able to convert it to any one of
> many more accessible XML formats, for screen readers, brail
> printers and so on. I don't know much about them, but hopefully you
> do!
> 
> Don't re-invent the wheel! You will find quite a few ways on the Open
> Office Wiki for converting the format to other things. You can also
> daisy-tail the XSLT files; for example use one to convert to xhtml and
> a second that converts xhtml to text.
> 
> Example (Display write files in the 'Firefox' browser).
> http://wiki.services.openoffice.org/wiki/Firefox_ODFReader_extension
> 
> 
> Don't forget that Open Office already has PDF export facilities, and
> Acrobat reader already has some accessibility ability for simple 
> documents (i.e single column, 'start at the beginning, keep going until
> you get to the end, and then stop'). For adding structure to other PDF 
> files you would need Acrobat Professional or software that can export 
> 'tagged' PDFs.
> 
> The case-study code is:
> 
> import xml.dom
> import xml.dom.ext
> import xml.dom.minidom
> import xml.parsers.expat
> import sys
> import od_number
> from zipfile import *
> from StringIO import *
> 
> if (len(sys.argv) == 4):
> 
>      #   Open an existing OpenDocument file
>      #
>      inFile = ZipFile( sys.argv[1] )
> 
>      #   ...and a brand new output file
>      #
>      outFile = ZipFile( sys.argv[2], "w", ZIP_DEFLATED );
> 
>      getParameters( sys.argv[3] )
> 
>      #
>      #   modify all appropriate currency styles
>      #
>      fixCurrency( "styles.xml" )
>      fixCurrency( "content.xml" )
> 
>      #
>      #   copy the manifest
>      #
>      copyManifest( )
> 
>      inFile.close
>      outFile.close
> else:
>      print "Usage: " + sys.argv[0] + " inputfile outputfile parameterfile"



From duncan.booth at invalid.invalid  Fri Mar 23 11:21:50 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 23 Mar 2007 15:21:50 GMT
Subject: "finally" for unit test
References: <1174648739.464811.7150@y80g2000hsf.googlegroups.com>
	<Xns98FC7D56675EEduncanbooth@127.0.0.1>
	<slrnf07m4q.3nr.grahn+nntp@frailea.sa.invalid>
Message-ID: <Xns98FC9B77EB286duncanbooth@127.0.0.1>

Jorgen Grahn <grahn+nntp at snipabacken.dyndns.org> wrote:

> On 23 Mar 2007 12:19:15 GMT, Duncan Booth
> <duncan.booth at invalid.invalid> wrote: 
>> "killkolor" <gabriel.hase at gmail.com> wrote:
>>
>>> I have a unittest framework that tests a single function that in
>>> turn works with files (takes input and outputs in the same file, no
>>> return values).
>>
>> I would want to split that function into two:
>>
>> a) one which does the processing, but not working with a file,
> 
> Better to make it work with "a file", in the sense that it works with
> file-like objects so you can feed and leech it using StringIO.

I'm assuming, perhaps wrongly, that something which takes input from a file 
and produces output into the same file is doing something beyond the simple 
interface supported by StringIO. So I was guessing either that something 
like FileInput is involved, or seeking and modifying in-place.

Anyway, the principle is the same: you make sure no function does more than 
one job, and you make sure that all functions are testable independently.


From vafada at gmail.com  Tue Mar 13 10:54:41 2007
From: vafada at gmail.com (Mark Bryan Yu)
Date: 13 Mar 2007 07:54:41 -0700
Subject: CD insert/eject detection
Message-ID: <1173797681.851722.41340@64g2000cwx.googlegroups.com>

Hi,

I'm trying to make a Audio CD ripper using python.

is there a way (library, module, etc) to detect when a CD was inserted
or ejected?



From nick at craig-wood.com  Wed Mar 28 05:30:03 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Wed, 28 Mar 2007 04:30:03 -0500
Subject: with timeout(...):
References: <slrnf0f59e.a21.nick@irishsea.home.craig-wood.com>
	<56prsrF2am4a1U1@mid.uni-berlin.de>
	<mailman.5660.1174978878.32031.python-list@python.org>
	<slrnf0hjhg.php.nick@irishsea.home.craig-wood.com>
	<mailman.5697.1175060331.32031.python-list@python.org>
Message-ID: <slrnf0kdbj.av8.nick@irishsea.home.craig-wood.com>

Hendrik van Rooyen <mail at microcorp.co.za> wrote:
>   "Nick Craig-Wood" <nick at craig-wood.com> wrote:
> > Hendrik van Rooyen <mail at microcorp.co.za> wrote:
> > >  But would be useful to be able to do without messing with
> > >  threads and GUI and imports. 
> > >  Could be hard to implement as the interpreter would have 
> > >  to be assured of getting control back periodically, so a 
> > >  ticker interrupt routine is called for - begins to sound more 
> > >  like a kernel function to me.  
> > >  Isn't there something available that could be got at via ctypes?
> > 
> > I think if we aren't executing python bytecodes (ie are blocked in the
> > kernel or running in some C extension) then we shouldn't try to
> > interrupt.  It may be possible - under unix you'd send a signal -
> > which python would act upon next time it got control back to the
> > interpreter, but I don't think it would buy us anything except a whole
> > host of problems!
> 
>  Don't the bytecodes call underlying OS functions? - so is there not a case
>  where a particular bytecode could block, or all they all protected by
>  time outs?

I beleive the convention is when calling an OS function which might
block the global interpreter lock is dropped, thus allowing other
python bytecode to run.

>  Embedded code would handle this sort of thing by interrupting
>  anyway and trying to clear the mess up afterward - if the limit
>  switch does not appear after some elapsed time, while you are
>  moving the 100 ton mass, you should abort and alarm, regardless of
>  anything else...  And if the limit switch sits on a LAN device, the
>  OS timeouts could be wholly inappropriate...

Well, yes there are different levels of potential reliability with
different implementation strategies for each!


-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From nagle at animats.com  Wed Mar  7 01:39:50 2007
From: nagle at animats.com (John Nagle)
Date: Wed, 07 Mar 2007 06:39:50 GMT
Subject: Recommended FastCGI module?
Message-ID: <W6tHh.1644$uo3.758@newssvr14.news.prodigy.net>

   What's the recommended FastCGI module for Python.  There are at least five:

	The Robin Dunn / Total Control Software version:
	http://alldunn.com/python/fcgi.py
      	Last revised in 1998.

	The "JonPy" version:
	http://jonpy.sourceforge.net/fcgi.html
	Last revised in 2004.

	The Alan Saddi version:
	http://svn.saddi.com/py-lib/trunk/fcgi.py
	Last revision date unknown.

	The Cheese Shop version: python-fastcgi 1.1
	http://cheeseshop.python.org/pypi/python-fastcgi
	Requires Open Market C system.
	Last revised in 2005 for Python 2.3.

	The Peter Astrand version:
    http://cvs.lysator.liu.se/viewcvs/viewcvs.cgi/webkom/thfcgi.py?cvsroot=webkom
	Last revised in 2004 for Python 2.3.

				John Nagle


From hitesh287 at gmail.com  Sun Mar  4 17:33:59 2007
From: hitesh287 at gmail.com (Hitesh)
Date: 4 Mar 2007 14:33:59 -0800
Subject: MS SQL Database connection
Message-ID: <1173047639.166841.301030@h3g2000cwc.googlegroups.com>


Hi currently I am using DNS and ODBC to connect to MS SQL database.
Is there any other non-dns way to connect? If I want to run my script
from different server  I first have to create the DNS in win2k3.

Thank you,
hj



From jstroud at mbi.ucla.edu  Thu Mar  8 15:23:40 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Thu, 08 Mar 2007 12:23:40 -0800
Subject: tkinter how to write
In-Reply-To: <esnk48$m4m$1@ss408.t-com.hr>
References: <esnk48$m4m$1@ss408.t-com.hr>
Message-ID: <esprcd$heb$1@zinnia.noc.ucla.edu>

Gigs_ wrote:
> as I write my first gui program (text editor) I wanna ask you guys how 
> to separate code in classes.?
> Should I put in one class my menu and in another class text and 
> scorllbars etc?
> 
> or something else?
> 
> 
> thanks

Check out Grayson: http://www.manning.com/grayson/

Its $25 for the pdf and is worth about 20 or 30 times that in the effort 
it will take you if you attempt to re-invent the wheel.

For an example of a Tkinter code disaster from not having a good 
reference, glimpse at the source of <http://passerby.sf.net>.

How I wish I'd just read the damn book first!

James


From sigzero at gmail.com  Sat Mar 24 14:47:40 2007
From: sigzero at gmail.com (Robert Hicks)
Date: 24 Mar 2007 11:47:40 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <56l7m1F29kgs9U1@mid.uni-berlin.de>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<56l7m1F29kgs9U1@mid.uni-berlin.de>
Message-ID: <1174762060.432122.203930@n59g2000hsh.googlegroups.com>

On Mar 24, 2:06 pm, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
> Robert Hicks schrieb:
>
> > I want to upgrade to 2.5 but I don't see any unistall instructions
> > anywhere.
>
> Don't do it. OSX uses the shipped version for its own purposes, and
> you'll break things if you uninstall it.
>
> Diez

No, the OSX version is like 2.3 something. I installed the 2.4.4
version in /usr/local bypassing the Apple stuff.

Robert



From nagle at animats.com  Wed Mar 21 01:00:25 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 20 Mar 2007 22:00:25 -0700
Subject: Can sqlite read gzipped databases?
In-Reply-To: <mailman.5371.1174449014.32031.python-list@python.org>
References: <mailman.5371.1174449014.32031.python-list@python.org>
Message-ID: <iZ2Mh.16361$bb1.4408@newssvr17.news.prodigy.net>

    Gzipped files aren't a good random access medium.  It's
unlikely that anyone will implement this.

				John Nagle

Paul Smith wrote:
> Hi,
> 
> I'd like to read a series of sqlite database files that have already been 
> gzipped and was wondering if this can be done on the fly. In other words, can 
> I avoid explicitly unzipping the file into another file, but instead get an 
> SQL connection to the zip file either directly (can't see an option to do 
> this) or to an object in memory resulting from unzipping, eg. (hypothetically);
> 
> import gzip
> from sqlite3 import dbapi2 as sqlite
> 
> data = gzip.GzipFile('Mydbase.db.gz','r')
> d = data.read()
> cnx = sqlite.connect(d) # or .connect(data)
> cur = cnx.cursor()
> ....etc
> 
> The above of course doesn't work, but just to give you the idea.
> 
> Thanks,
> Paul
> 
> 


From http  Sat Mar 17 02:19:12 2007
From: http (Paul Rubin)
Date: 16 Mar 2007 22:19:12 -0800
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
Message-ID: <7xwt1g1jfj.fsf@ruckus.brouhaha.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> writes:
> (1) It's wrong. That always returns the length of the list. Perhaps you
> meant something like this?
> len(["anything will do" for t in x if y > t])

Yeah, that's what I meant.  


From kyosohma at gmail.com  Mon Mar 26 12:08:16 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 26 Mar 2007 09:08:16 -0700
Subject: Kill thread or at least socket.getaddrinfo
In-Reply-To: <pan.2007.03.26.15.53.12@gmail.com>
References: <pan.2007.03.26.15.53.12@gmail.com>
Message-ID: <1174925296.683942.279070@b75g2000hsg.googlegroups.com>

On Mar 26, 10:53 am, Thomas Dybdahl Ahle <lob... at gmail.com> wrote:
> Hi, I'm writing an application that connects to the internet.
> Something like this:
>
> for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM):
>     af, socktype, proto, canonname, sa = res
>     try:
>         self.sock = socket.socket(af, socktype, proto)
>
> Now if the user press the cancel button, I'd like the connection to
> imidiatly stop. I run
> self.sock.shutdown(socket.SHUT_RDWR)
> self.sock.close()
> Dunno if they are both nessesary. I normaly use only the first, but it
> makes no difference to use both.
>
> If python is at the actual connection in socket.socket( this work fine,
> but if python is at calling socket.getaddrinfo(, it doesn't stop.
>
> I also can't kill the thread, as it is afaik not a possibility in python.
> Is there any other way to do this?


This is addressed to some degree on a wxPython wiki at:

http://wiki.wxpython.org/index.cgi/LongRunningTasks

I think you can also use the join() method. I've also heard that if
you know the pid, you can kill it, but that's not always a clean way
of accomplishing the task.

Mike



From gagsl-py2 at yahoo.com.ar  Sun Mar 25 18:51:26 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 25 Mar 2007 19:51:26 -0300
Subject: call to function by text variable
References: <1174862186.134912.117270@p15g2000hsd.googlegroups.com>
Message-ID: <op.tprof0hgx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sun, 25 Mar 2007 19:36:26 -0300, ianar? <ianare at gmail.com> escribi?:

> list = ["Replace", "ChangeCase", "Move"]
> textVariable = list[n]
> self.operations.insert(pos, operations.[textVariable].Panel(self,
> main))
>
> Is something sort of like that possible?

Try getattr:
textVariable = "Replace"
getattr(operations, textVariable) == operations.Replace

Perhaps you could just store the result in your list; instead of  
["Replace", "ChangeCase", "Move"], use [operations.Replace,  
operations.ChangeCase, operations.Move] (it's not always applicable, of  
course: maybe operations is reassigned, or those attributes mutate or  
don't always exist...)

-- 
Gabriel Genellina



From raboliot at gmail.com  Mon Mar 26 17:04:08 2007
From: raboliot at gmail.com (raboliot at gmail.com)
Date: 26 Mar 2007 14:04:08 -0700
Subject: wx.grid problem
In-Reply-To: <1174935508.081326.113400@p77g2000hsh.googlegroups.com>
References: <4607e4f1$0$5098$ba4acef3@news.orange.fr>
	<1174925041.703904.151900@y80g2000hsf.googlegroups.com>
	<4607f550$0$5092$ba4acef3@news.orange.fr>
	<1174935508.081326.113400@p77g2000hsh.googlegroups.com>
Message-ID: <1174943048.133231.113430@r56g2000hsd.googlegroups.com>

On 26 mar, 20:58, kyoso... at gmail.com wrote:
> On Mar 26, 11:30 am, BH <B... at bh.com> wrote:
>
>
>
> > Yes, absolutely, but try to minimize it, and the scrollbars stays hidden !!!
>
> > kyoso... at gmail.com a ?crit :
>
> > > On Mar 26, 10:20 am, BH <B... at bh.com> wrote:
> > >> Hi !
>
> > >> I have a small problem with wx.Grid and scrollbars.
> > >> Scrollbars definitively dissapears after resizing the frame.
>
> > >> Thx for help
>
> > >> #----------------------------------------------------------------------
> > >> import wx,wx.grid
> > >> #----------------------------------------------------------------------
> > >> class MainWindow(wx.Frame):
> > >>       def __init__(self,parent,id,title):
> > >>           wx.Frame.__init__(self,parent,wx.ID_ANY,title)
> > >>           #--
> > >>           self.grid= wx.grid.Grid(id=wx.ID_ANY,parent=self)
> > >>           self.grid.CreateGrid(numRows=10,numCols=2)
> > >>           self.grid.Fit()
> > >>           self.Fit()
> > >>           #--
> > >>           self.Show(1)
> > >> #----------------------------------------------------------------------
> > >> app = wx.PySimpleApp()
> > >> frame=MainWindow(None,-1,'Grid sizer')
> > >> app.MainLoop()
> > >> del app
>
> > > If I understand this correctly, that is normal. Your grid is only two
> > > columns by 10 rows, so if you resize your frame so that it shows all
> > > rows and columns, the scroll bars will disappear, much like other
> > > apps, such as FireFox. If you enlarge the frame enough, the scrollbars
> > > go away.
>
> > > Mike
>
> The code you posted works for me. I am using Windows XP Pro, Python
> 2.4, wxPython 2.8. When I enlarge it, the scrollbars go away and when
> I shrink it down, the scrollbars reappear. I tried using sizers, but
> that seemed to cause problems.
>
> I highly recommend that you post your questions about wxPython to the
> wxPython users group. They have many talented and knowledgeable people
> there. Seehttp://wxpython.org/maillist.php
>
> Mike

OK, Thx I will have a look.
FYI The scrollbars definitively dissapears under Linux too ! (for me)

Best regards,

Bertrand



From rdaunoravicius at gmail.com  Tue Mar 27 15:05:54 2007
From: rdaunoravicius at gmail.com (rdaunoravicius at gmail.com)
Date: 27 Mar 2007 12:05:54 -0700
Subject: Extending a class on runtime
Message-ID: <1175022354.782957.34130@o5g2000hsb.googlegroups.com>

Hi,

Let's say you have a bunch of instatiated objects of the same class on
your hands and you want to had some functionality to them.

I'm facing this situation while working with PyGTK and libglade to
create a GUI. Libglade creates a whole object tree representing the
GUI out of an XML file, and a bunch of GtkComboBox objects are
instantiated. I don't like the way GtkComboBox objects works, so I'd
like them to have some extra methods. Inheriting and extending
GtkComboBox is pointless because I'm not the one instantiating the
class. I only came up with three possibilities:

    A) Adding my methods to the objects in a for-loop

    B) Adding my methods to the GtkComboBox class (I tried this and it
seems to work)

    C) Create a GtkComboBoxExtended class inheriting from GtkComboBox
and change the instances' class in a for-loop.

I'm kind of inclined to C. B sounds dangerous and A is plain ugly.
I'm very new to this and I'm sure there is a well-established pythonic
way to solve this problem, so I'm appealing for  your vast collective
wisdom to point me in the path of righteousness.

Thanks,
Rodrigo



From gregturn at mindspring.com  Mon Mar 12 15:31:56 2007
From: gregturn at mindspring.com (Goldfish)
Date: 12 Mar 2007 12:31:56 -0700
Subject: Single string print statements on multiple lines.
In-Reply-To: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
References: <1173702080.939606.169630@j27g2000cwj.googlegroups.com>
Message-ID: <1173727915.911896.136890@t69g2000cwt.googlegroups.com>

http://www.catb.org/~esr/faqs/smart-questions.html

Don't post homework questions.



From joshua at eeinternet.com  Fri Mar 30 16:25:19 2007
From: joshua at eeinternet.com (Joshua J. Kugler)
Date: Fri, 30 Mar 2007 12:25:19 -0800
Subject: Object Oriented Database with interface for Pyhton
References: <1175245459.867371.92500@n76g2000hsh.googlegroups.com>
Message-ID: <460d65ba$0$16368$88260bb3@free.teranews.com>

On Friday 30 March 2007 01:04, alfaeco at gmail.com wrote:

> Hello all
> 
> I am looking for an object oriented database with interffaces for
> python. Either open source or commercial.
> 
> I am looking for a Database not a object persistence system. I would
> like to be able to execute queries outside from the aplication. If
> posible wih OQL ( object query language )
> 
> The only candidate I have now is Cache from Intersystem
> 
> Thanks in advance

I've not used it, but http://schevo.org/ certainly looks interesting.

j

-- 
Joshua Kugler
Lead System Admin -- Senior Programmer
http://www.eeinternet.com
PGP Key: http://pgp.mit.edu/ ?ID 0xDB26D7CE

-- 
Posted via a free Usenet account from http://www.teranews.com



From j.spies at hccnet.nl  Mon Mar 19 06:31:20 2007
From: j.spies at hccnet.nl (Jaap Spies)
Date: Mon, 19 Mar 2007 11:31:20 +0100
Subject: from maple to python + numpy/scipy
In-Reply-To: <mailman.5277.1174297759.32031.python-list@python.org>
References: <mailman.5277.1174297759.32031.python-list@python.org>
Message-ID: <etlopp$l2l$1@news2.zwoll1.ov.home.nl>

Daniel Nogradi wrote:
> I'm just getting started with numpy/scipy and first would like to get
> a view of what it can do and what it can't. The main idea is to move
> from maple to python and the first thing that poped up is the fact
> that maple is very convenient for both formal manipulations and exact
> integer calculations. For instance if a matrix has integer entries and
> the eigenvalues are integers maple can find these exactly.
> 
> Can numpy/scipy do this? Or the eigenvalues will always be floating
> point numbers?

Have a look at SAGE (Software for Algebra and Geometry Experimentation)
http://www.sagemath.org/

Jaap



From carl.douglas at gmail.com  Wed Mar 21 02:50:35 2007
From: carl.douglas at gmail.com (Carl Douglas)
Date: Wed, 21 Mar 2007 17:50:35 +1100
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <1174457565.500159.58060@n59g2000hsh.googlegroups.com>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<1174457565.500159.58060@n59g2000hsh.googlegroups.com>
Message-ID: <6f7c837c0703202350j2b9c04d1ra1d4c3b32d290a7d@mail.gmail.com>

On 20 Mar 2007 23:12:45 -0700, John Pye <john.pye at gmail.com> wrote:
> On Mar 21, 4:49 pm, "Carl Douglas" <carl.doug... at gmail.com> wrote:
> > 1) Rebuild Python with a different compiler/linker kit so it links to
> > the same CRT as my project, in your case find a mingw built Python.dll
> >
> > 2) Rebuild [with MSVC]
>
> OK, so let's say that I must support EXISTING installations of Python
> 2.4 on computers I have no control over. And let's say that I detest
> MSVC and want to push on with MinGW at all costs. What then?
>
> I read something about being using '-lmsvcrt71' or '-lmsvcrt' with
> GCC...?
>

You could try using dumpbin and dlltool to generate an import library
for gcc from msvcrt71.dll.  Perhaps this might work... I have never
tried it.

Search the web for "mingw dumpbin dlltool".

HTH

> JP
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Wed Mar 21 11:47:31 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 21 Mar 2007 16:47:31 +0100
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
Message-ID: <56d2ciF266b71U1@mid.individual.net>

dmitrey wrote:

> it would reduce length of code lines and make them more readable,
> + no needs to write annoing charecters.

IMHO, it's less readable.

I suppose I'm not on my own with this opinion.

Regards,


Bj?rn

-- 
BOFH excuse #34:

(l)user error



From bbxx789_05ss at yahoo.com  Sat Mar 17 12:57:56 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 17 Mar 2007 09:57:56 -0700
Subject: Finding the insertion point in a list
In-Reply-To: <45fbbf18$0$3816$5402220f@news.sunrise.ch>
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<1174075809.968650.96030@e1g2000hsg.googlegroups.com>
	<45fbbf18$0$3816$5402220f@news.sunrise.ch>
Message-ID: <1174150676.624475.111140@y66g2000hsf.googlegroups.com>

On Mar 17, 4:12 am, "Martin Blume" <mbl... at socha.net> wrote:
> "7stud" schrieb
>
>
>
> > How about:
>
> > -----------
> > x = [0, 100, 200, 1000]
> > y = -1
> > inserted = False
>
> > for i in range(len(x)):
> >         if(y <= x[i]):
> >                 x.insert(i, y)
> >                 inserted = True
> >                 break
> > if(not inserted): x.append(y)
>
> > print x
> > ------------
>
> You can get rid of the sentinel "inserted" using the
> else clause of the for loop:
>
> for i in range(len(x)):
>         if (y <= x[i]):
>                 x.insert(i, y)
>                 break
> else: x.append(y)
>
> Python is cool :-)
>
> IMHO. HTH.
> Martin

for-else?  Neat.



From steve at REMOVE.THIS.cybersource.com.au  Sat Mar  3 17:22:49 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 04 Mar 2007 09:22:49 +1100
Subject: Questions about app design - OOP with python classes
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<54q5lnF22aafrU1@mid.uni-berlin.de>
Message-ID: <pan.2007.03.03.22.22.48.4257@REMOVE.THIS.cybersource.com.au>

On Fri, 02 Mar 2007 09:30:20 +0100, Diez B. Roggisch wrote:

>> A type system doesn't help. So what if they're both floats? The test
>> is still bogus, your code will still wait too long to engage the
>> retro-rockets, and the billion dollar space craft will still be travelling
>> at hundreds of miles an hour when it reaches the surface of Mars.
> 
> A type system _could_ help. 

It's easy to wave your hands and say that Microsoft could have done
something different, but they had to work with what they had, not some
hypothetical alternative language with a hypothetical type system that
didn't exist then (if it even exists now).


> Multi-Level-Specification allows you to 
> express physical quantities with their respective unit, and operations 
> on them to yield the combined unit at compile-time. There are some 
> rather complicated cases where simple unification won't solve the 
> type-equations, but then you might annotate things explicitly.

Which is what Apps Hungarian _is_.


-- 
Steven.



From anton.vredegoor at gmail.com  Thu Mar 22 04:59:27 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Thu, 22 Mar 2007 09:59:27 +0100
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <mailman.5428.1174517933.32031.python-list@python.org>
References: <mailman.5428.1174517933.32031.python-list@python.org>
Message-ID: <ettgei$rki$1@news2.zwoll1.ov.home.nl>

Steven D. Arnold wrote:

> Neosynapse is seeking a senior software developer located in or  

Subtract ten points from your credibility for writing senior here.

> willing to relocate to the Northern VA area to join a project  
> building one of the largest grid computing data platforms in the  
> world.  Skill and experience required for this engagement include:

Another 10 points minus for claiming to be the "largest" (biggest, 
industry leader etc.). Are you looking for a developer or is this just 
an ad for your company?

> * at least 7 years experience in professional software development;

Minus 20 points for using the term professional. Open source is cool.

> * at least 3 years of Python software development experience;

OK. You can ask for that. As long as you're not blind when someone shows 
you some code. I mean some people can't see code until it's connected to 
some 'job'.

> * proven experience with design, implementation, debugging and  
> documentation of large projects;

Hmm. Why, may I ask? Can you even code? Who are you anyway?

> * past experience with the development of networking client and  
> server software;

You really seem to know what you want, eh?

> * experience using SQL databases in the development of software  
> applications;

Experience, experience, experience. Why don't you just re-hire the one 
you just fired because he wouldn't say yes to your absurd demands? I 
mean after he made a honest guesstimate of the time frame necessary for 
the job and you pinned him down to the minute?

> * excellent written and oral communication skills, including the  
> ability to clearly explain design choices and discuss alternatives  
> with colleagues and managers.

Yeah.

> The following skills are desirable but not mandatory:
> * experience using SAN file systems;
> * experience with general web software development;
> * experience writing applications that leverage Oracle databases;
> * experience writing and integrating C modules with Python;
> * experience with Ruby or Ruby on Rails.

* endure stupid boss messing with the creative process.

> You must be able to function independently as you will work from home  
> a significant amount of time on this project.  Limited travel to PA,  
> NJ, and CO will be required.  The initial phase of this project will  
> last 6 months, with follow-on work planned for approximately 3 years.

Says you. It could be anything from 3 months to ten years, depending on 
how often you change your mind.

> If interested and qualified for this position, please submit your  
> detailed resume, contact and rate requirements to jobs at neosynapse.net  
> with the subject line PY-5.  Principals only.

Go away with that resume **** Why do you think you have a right to my 
personal info when you're not giving any? By the way, I'm in Europe, 
there's more than just US you know.

A.

/rant



From silverburgh.meryl at gmail.com  Thu Mar 29 15:49:55 2007
From: silverburgh.meryl at gmail.com (silverburgh.meryl at gmail.com)
Date: 29 Mar 2007 12:49:55 -0700
Subject: How can I get the content of a web site using http library
In-Reply-To: <1175196846.439678.109250@y66g2000hsf.googlegroups.com>
References: <1175195899.489572.73300@y66g2000hsf.googlegroups.com>
	<1175196846.439678.109250@y66g2000hsf.googlegroups.com>
Message-ID: <1175197795.023801.158240@d57g2000hsg.googlegroups.com>

On Mar 29, 2:34 pm, kyoso... at gmail.com wrote:
> On Mar 29, 2:18 pm, "silverburgh.me... at gmail.com"
>
>
>
> <silverburgh.me... at gmail.com> wrote:
> > I am trying to get the content of a web site like this:
> > But my question is how can I do a 'GET' request without putting the '/
> > index.html''
>
> >    h = httplib.HTTP('www.yahoo.com')
>
> >         # it takes 2 arguments here, but I don't know if the site has
> > '/index.html' , how can I leave this out?
>
> >         h.putrequest('GET')
> >         h.endheaders()
>
> >         errcode, errmsg, headers = h.getreply()
>
> >         if (errcode == 200):
>
> >             f = h.getfile()
>
> > Thank you for your help.
>
> You may want to go with the urllib module instead. Check out the how-
> to below:
>
> http://www.voidspace.org.uk/python/articles/urllib2.shtml
>
> Mike

Thanks. Can you please tell me how can I do a Post form submission
using the urlLib2 library? I look at your link, but i cant find an
example there.

Thank you.



From nobody at invalid.com  Mon Mar 12 13:01:29 2007
From: nobody at invalid.com (Erik Johnson)
Date: Mon, 12 Mar 2007 10:01:29 -0700
Subject: Newbie Question : "grep"
References: <1173714587.830723.59210@8g2000cwh.googlegroups.com>
	<45f5864f$1@nntp.zianet.com>
Message-ID: <45f5877c$1@nntp.zianet.com>

Sorry, I forgot to paste the modified version of my code in the post:. I
think this is the same behaviour:

for line in lines:
    if "placed" in line:
        if "i_a/i_b/ROM/" in line:
            pos = (line.split()[4]).split("_")[1]
            found = False

            for (tag, (start, end)) in tags:
                if tag in line:
                    found = True
                    print "        i_a/i_b/ROM/%s [%i:%i] LOC =" %\
                        (pos, tag, start, end)
                    break

            if not found:
                print "Error"




From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 27 12:54:49 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 27 Mar 2007 18:54:49 +0200
Subject: Help in Placing Object in Memory
In-Reply-To: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
References: <1175006005.782360.233620@b75g2000hsg.googlegroups.com>
Message-ID: <46094c51$0$21521$426a34cc@news.free.fr>

Clement a ?crit :
> I am newbie to Python...... 

To Python only, or to both Python and programming in general ?

> i want to know something..........
> 
> can i place an object in disk instead of placing in Main Memory...?

You can store it on disk (cf pickles and friends), but to actually use 
it you'll have to load it in memory anyway.

> can two python script share a common object....?

While there are technical answers on this, I guess you'd better learn 
how to use functions and pass objects between them.

My 2 cents.


From half.italian at gmail.com  Wed Mar 14 21:19:53 2007
From: half.italian at gmail.com (half.italian at gmail.com)
Date: 14 Mar 2007 18:19:53 -0700
Subject: Circular Class Logic
In-Reply-To: <mailman.5118.1173920321.32031.python-list@python.org>
References: <1173918948.167721.46620@e1g2000hsg.googlegroups.com>
	<mailman.5118.1173920321.32031.python-list@python.org>
Message-ID: <1173921593.166607.240390@e65g2000hsc.googlegroups.com>

>
> That is, each of the classes want to inherit from the others.

That's not exactly what I'm doing, but your comment still might help.
I actually want to include an instance of a subclass in it's
superclass like this:

===== foo.py =====
import Baz

class Foo:
	baz = Baz.Baz()

	def __init__(self):
		pass
=====

===== bar.py =====
import Foo

class Bar(Foo.Foo):
	pass
=====

===== baz.py =====
import Bar

class Baz(Bar.Bar):
	pass
=====

> The usual solution in these cases is to find the common required
> functionality and factor that out to a separate class that is then the
> superclass of two of the existing classes, breaking the circle.
>
> ===== wibble.py =====
> # no dependencies
>
> class Wibble(object):
>     pass
> =====
>
> ===== foo.py =====
> import wibble
> import bar
>
> class Foo(wibble.Wibble, bar.Bar):
>     pass
> =====
>
> ===== baz.py =====
> import wibble
>
> class Baz(wibble.Wibble):
>     pass
> =====
>
> Note that Baz no longer subclasses foo.Foo, and both Foo and Baz get
> the common functionality they share from wibble.Wibble.

I have to think about that for a bit and see if it makes sense to
factor anything out.  Thanks for the idea.  Would that be the best
solution considering the above description?

~Sean
>
> --
>  \     "Buy not what you want, but what you need; what you do not need |
>   `\           is expensive at a penny."  -- Cato, 234-149 BC, Relique |
> _o__)                                                                  |
> Ben Finney




From adamgarstang at googlemail.com  Sat Mar 10 12:15:11 2007
From: adamgarstang at googlemail.com (Adam)
Date: 10 Mar 2007 09:15:11 -0800
Subject: Logfile for my App not "rewriting"
Message-ID: <1173546911.842545.249610@j27g2000cwj.googlegroups.com>

Hello,

I have a small app I am creating to crawl a directory and check that
if it is moved to another a location it's path will not break a
character limit. Usually the Windows path limit.

Now the script is working but every time I want to scan again I have
to restart for the log files to be written. I want to just be able to
change the parameter as I please and click scan without having to
restart the app for the log file to change.
(I am new to programming so the code could be untidy for want of a
better word.)

Here's the code:

###Code###

#file/path finder
#indentation value 4
import os,glob
import Tkinter as tk


# Class to create the Application and UI
class Theapp:


    def __init__(self):
        # Create GUI parts. Will allign later with grid
        self.mainWindow = tk.Tk()
        self.mainWindow.geometry("%dx%d%+d%+d" % (700, 400, 0, 0)) #
(width,height, x, y)
        self.labAll = tk.Label(self.mainWindow, text="All Files/
Folders:")
        self.labVi = tk.Label(self.mainWindow, text="Violating Files/
Folders:")

        #Create a sub-frame containing textbox and scrollbar for All
files scanned display
        self.allTxtf = tk.Frame(self.mainWindow, width=700,
height=164)
        self.scrlr1 = tk.Scrollbar(self.allTxtf)
        self.txtBoxall = tk.Text(self.allTxtf, wrap=tk.CHAR,
yscrollcommand=self.scrlr1.set, width=700, height=164)
        self.scrlr1.config(command = self.txtBoxall.yview)

        #Create another sub-frame containing textbox and scrollbar for
the Violating files display
        self.viTxtf = tk.Frame(self.mainWindow, width=700, height=164)
        self.scrlr2 = tk.Scrollbar(self.viTxtf)
        self. txtBoxvi = tk.Text(self.viTxtf, wrap=tk.CHAR,
yscrollcommand=self.scrlr2.set, width=700, height=164)
        self.scrlr2.config(command = self.txtBoxvi.yview)

        #Create another sub-frame to contain the controls
        self.ctrlFrame = tk.Frame(self.mainWindow, width=700,
height=72)
        self.labDir = tk.Label(self.ctrlFrame, text="Dir:")
        self.entDir = tk.Entry(self.ctrlFrame)
        self.labTardir = tk.Label(self.ctrlFrame, text="Target Dir:")
        self.entTardir = tk.Entry(self.ctrlFrame)
        self.labChar = tk.Label(self.ctrlFrame, text="Char. Limit:")
        self.entChar = tk.Entry(self.ctrlFrame)
        self.labVi2 = tk.Label(self.ctrlFrame, text="Violations:  ")
        self.btFind = tk.Button(self.ctrlFrame, text="Scan", command =
self.fillboxes)
        self.btExit = tk.Button(self.ctrlFrame, text="Exit", command =
self.quitEvent)

        #Use tkinter's grid geometry manager to allign and display the
GUI
        self.mainWindow.grid()

        #Change weight to allow resize
        self.mainWindow.grid_rowconfigure(1, weight=1)
        self.mainWindow.grid_rowconfigure(3, weight=1)
        self.mainWindow.grid_columnconfigure(0, weight=1)

        self.allTxtf.grid_rowconfigure(0, weight=1)
        self.allTxtf.grid_columnconfigure(0, weight=1)
        self.allTxtf.grid_columnconfigure(1, weight=0)

        self.viTxtf.grid_rowconfigure(0, weight=1)
        self.viTxtf.grid_columnconfigure(0, weight=1)
        self.viTxtf.grid_columnconfigure(1, weight=0)

        self.ctrlFrame.grid_columnconfigure(1, weight=1)
        self.ctrlFrame.grid_columnconfigure(3, weight=1)
        self.ctrlFrame.grid_columnconfigure(5, weight=1)

        #Frist allign the 3 main frames
        self.labAll.grid(row=0, column=0)
        self.allTxtf.grid(row=1, column=0)
        self.labVi.grid(row=2, column=0)
        self.viTxtf.grid(row=3, column=0)
        self.ctrlFrame.grid(row=4, column=0)
        #Now allign the content of allTxtf
        self.txtBoxall.grid(row=0, column=0)
        self.scrlr1.grid(row=0, column=1, sticky=tk.N + tk.S)
        #Now allign the content for viTxtf
        self.txtBoxvi.grid(row=0, column=0)
        self.scrlr2.grid(row=0, column=1, sticky=tk.N + tk.S)
        #Now allign the content for ctrlFrame
        self.labDir.grid(row=0, column=0, sticky=tk.E)
        self.entDir.grid(row=0, column=1)
        self.labTardir.grid(row=0, column=2)
        self.entTardir.grid(row=0, column=3)
        self.labChar.grid(row=0, column=4, sticky=tk.E)
        self.entChar.grid(row=0, column=5)
        self.labVi2.grid(row=0, column=6)
        self.btFind.grid(row=0, column=7)
        self.btExit.grid(row=0, column=8)
        self.entChar.insert(0, "254") #Insert default value

    def findallfiles(self, base):
        self.results = []
        for root,dirs,files in os.walk(base):
            os.chdir(root)
            self.scan = glob.glob("*")
            for r in self.scan:
                if root[-1] == "\\":
                    self.results.append(root + r)
                else:
                    self.results.append(root + "\\" + r)
        return self.results


    def fillboxes(self):
        os.remove('viFiles.txt')
        print "logfile deleted"
        self.txtBoxall.delete(1.0, tk.END)
        self.txtBoxvi.delete(1.0, tk.END)
        self.logfile = file("viFiles.txt", "w")
        print "logfiles created"
        self.dispresults = self.findallfiles(self.entDir.get())
        index = 0
        lenghth = 0
        dif = 0
        #Debug text input to command prompt
        print "Dir: " + self.entDir.get() + "\n" + "Tar: " +
self.entTardir.get() + "\n" + "Char: " + self.entChar.get() + "\n"
        for i in self.dispresults:
            self.txtBoxall.insert(tk.END, i + "\n")
            length = len(i) + len(self.entTardir.get()) -
len(self.entDir.get())
            if length > int(self.entChar.get()):
                index += 1
                txt = "Violations: " + str(index)
                dif = length - int(self.entChar.get())
                self.logfile.write(i + "\n" + "\n" + "Violating File
#: " + str(index) + "\n" + "Shorten by: " + str(dif) + "\n" + "\n" +
"---------------------------------" + "\n")
                self.txtBoxvi.insert(tk.END, i + "\n")
                self.labVi2.configure(text=txt)
        self.logfile.close()

    def quitEvent(self):
        raise SystemExit


if __name__ == "__main__":
    app = Theapp()
    app.mainWindow.mainloop()

###End Code###

TIA
Adam



From deets at nospam.web.de  Tue Mar  6 11:42:13 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 06 Mar 2007 17:42:13 +0100
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
	<45ed41f7$0$21515$426a74cc@news.free.fr>
	<1173198244.092412.17400@n33g2000cwc.googlegroups.com>
Message-ID: <555jv6F2314bbU1@mid.uni-berlin.de>

> I'd like to point out something though. More than one of the people
> who responded have implied that I am bringing my prior-language
> mindset to Python, even suggesting that my brain isn't built for
> Python. ;) In fact I think it's the other way around. I am struggling
> to take full advantage of the fact that Python is an interpreted
> language, to use Python in the most "Pythonic" way. You guys are
> telling me that's broken and I should go back to a workflow that is
> identical in spirit, and not necessarily any faster than I would use
> with a compiled language. While that might be the right answer in
> practice, I don't feel like it's a particularly "good" answer, and it
> confirms my initial impression that Python package management is
> broken.
> 
> I think you should be asking yourselves, "Did we all abandon reload()
> because it is actually an inferior workflow, or just because it's
> totally broken in Python?"

Sorry, but I fail to see the point of your argumentation.

Reloading a module means that you obviously have some editor open you code
your module in, and an interactive interpreter running where you somehow
have to make the 

reload(module)

line (re-)appear, and then most probably (unless the pure reloading itself
triggers some testing code) some other line that e.g. instantiates a class
defined in "module"

Now how exactly does that differ from having a test.py file containing

import module
<do-something>

and a commandline sitting there with a 

python test.py

waiting to be executed, easily brought back by a single key-stroke.

Especially if <do-something> becomes more that some easy lines brought back
by the command line history.

I've been writing python for a few years now, to programs the size of a few
K-lines, and _never_ felt the slightest need to reload anything. And as
there have been quite a few discussions like this in the past few years,
IMHO reload is a wart and should be removed.

Diez




From dave.opstad at monotypeimaging.com  Tue Mar 13 16:20:04 2007
From: dave.opstad at monotypeimaging.com (Dave Opstad)
Date: Tue, 13 Mar 2007 13:20:04 -0700
Subject: struct.pack oddity
References: <45f6bd4a$0$6972$afc38c87@> <45f6d7a9$1@nntp.zianet.com>
Message-ID: <dave.opstad-91D5E6.13200413032007@reader0901.news.uu.net>

In article <45f6d7a9$1 at nntp.zianet.com>,
 "Erik Johnson" <nobody at invalid.com> wrote:

>     Barring anyone else disagreeing with classifying it as a bug, I would
> suggest reporting it. Proper procedure for reporting a bug appears to be
> covered in section B of the Python Library Reference:
> http://docs.python.org/lib/reporting-bugs.html

Thanks for that link. I searched for an existing bug covering this case 
and found 1229380, which specifically lists the case I raised. The bug 
appears to have been closed last June, which confuses me since the bad 
behavior remains in 2.5.

Dave


From bignose+hates-spam at benfinney.id.au  Sun Mar 18 23:25:17 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Mon, 19 Mar 2007 14:25:17 +1100
Subject: Mastering Python
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
	<1174055241.079644.160750@e1g2000hsg.googlegroups.com>
	<1174271932.463826.106290@n59g2000hsh.googlegroups.com>
Message-ID: <87tzwh9aoy.fsf@benfinney.id.au>

"Paul McGuire" <ptmcg at austin.rr.com> writes:

> On Mar 16, 9:27 am, "BartlebyScrivener" <rpdool... at gmail.com> wrote:
> > I think you should extract that and spend twenty minutes tidying
> > it up and then publish it to the Python for Programmers page or
> > make it a downloadable .pdf.
> >
> > http://wiki.python.org/moin/BeginnersGuide/Programmers
>
> I've added it to [the above wiki page], see the last entry.

I missed this the first time around. Thanks for letting us know you'd
done this.

> Hope some find it entertaining, if not informative.

It looks like a great get-started guide for the many C++ refugees I
hope we can gain :-)

-- 
 \        "Why, I'd horse-whip you if I had a horse."  -- Groucho Marx |
  `\                                                                   |
_o__)                                                                  |
Ben Finney



From n00m at narod.ru  Sat Mar 17 23:46:06 2007
From: n00m at narod.ru (n00m)
Date: 17 Mar 2007 20:46:06 -0700
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1174166115.263201.51840@d57g2000hsg.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
	<7xslc5k9cc.fsf@ruckus.brouhaha.com>
	<1174158002.730076.22720@y80g2000hsf.googlegroups.com>
	<1174166115.263201.51840@d57g2000hsg.googlegroups.com>
Message-ID: <1174189566.189546.85510@y80g2000hsf.googlegroups.com>

bearophileH!

I gave to your "oil" svrl runs ("z in dict" instd of "dict.has_key"
saved only ~0.4 sec).
The result is (and I'm completely lost in all these
*optimizations* :)):


>>> ================================ RESTART ===
>>>
0
34.78 secs (bearophileH)
>>> ================================ RESTART ===
>>>
0
34.77 secs (bearophileH)
>>> ================================ RESTART ===
>>>
0
34.76 secs (bearophileH)
>>> ================================ RESTART ===
>>>
0
27.2460938471 secs (n00m)
>>> ================================ RESTART ===
>>>
0
27.2953596058 secs (n00m)
>>> ================================ RESTART ===
>>>
0
27.3709929614 secs (n00m)
>>>



In the name of exactness this is the tested codes:

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
from collections import defaultdict
import time, psyco


def main():
    sch = 0
    q,w,e,r = [],[],[],[]
    h = defaultdict(int)


    datafile = file("D:/m4000.txt")
    datafile.next()
    xrows = (map(int, line.split()) for line in datafile)
    q, w, e, r = zip(*xrows)


    for x in q:
        for y in w:
            h[x+y] += 1


    for x in e:
        for y in r:
            if -x-y in h:
                sch += h[-x-y]


    print sch


t = time.clock()
psyco.full()
main()
print round(time.clock() - t, 2), "secs (bearophileH)"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
import psyco, time

def main():
  q,w,e,r,sch,h = [],[],[],[],0,{}
  f = open("D:/m4000.txt","rt")
  for o in range(int(f.readline())):
    row = map(int, f.readline().split())
    q.append(row[0])
    w.append(row[1])
    e.append(row[2])
    r.append(row[3])
  f.close()

  for x in q:
    for y in w:
      if (x+y) in h:
        h[x+y] += 1
      else:
        h[x+y] = 1

  for x in e:
    for y in r:
      if -(x+y) in h:
        sch += h[-(x+y)]

  q,w,e,r,h = None,None,None,None,None
  print sch

t = time.clock()
psyco.full()
main()
print time.clock() - t,"secs (n00m)"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

PS Both Python & Psyco of 2.5 ver.



From psdasilvaX at esotericaX.ptX  Mon Mar 12 21:00:53 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Tue, 13 Mar 2007 01:00:53 +0000
Subject: Request for a change in the csv module.
In-Reply-To: <1173744248.195944.245550@t69g2000cwt.googlegroups.com>
References: <1173741982.944813@jubilee.claranet.pt>
	<1173744248.195944.245550@t69g2000cwt.googlegroups.com>
Message-ID: <1173747644.616698@jubilee.claranet.pt>

attn.steven.kuo at gmail.com escreveu:
> On Mar 12, 4:26 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
...

> 
> locale.setlocale(locale.LC_NUMERIC, 'pt_BR.ISO8859-1')
> csv_writer = csv.writer(open("foo.csv","w"), dialect='excel')
> rows = (('testing', 1.23), ('testing', 2.34))
> formatted_rows = ((string, locale.format('%g', number)) for
> (string,number) in rows)
> csv_writer.writerows(formatted_rows)


That works but it is a pain to use.
May be I'll sublass csv or even I'll write one myself.
It would be much better to be able to specify an additional
variabel to the Dialect class and change csv.

Thanks
Paulo


From johnmc at velseis.com.au  Fri Mar  9 18:53:03 2007
From: johnmc at velseis.com.au (John McMonagle)
Date: Sat, 10 Mar 2007 09:53:03 +1000
Subject: {Possible_Spam} Re: {Possible_Spam} tkinter text editor
In-Reply-To: <45F2BD00.7050604@hi.t-com.hr>
References: <espfgv$6q7$1@ss408.t-com.hr> <45F0AA7D.9080806@velseis.com.au>
	<45F2BD00.7050604@hi.t-com.hr>
Message-ID: <20070309233957.M41221@velseis.com.au>


---------- Original Message -----------
From: Gigs <gigs at hi.t-com.hr>
To: John McMonagle <jmcmonagle at velseis.com.au>
Sent: Sat, 10 Mar 2007 15:13:20 +0100
Subject: {Possible_Spam} Re: {Possible_Spam} tkinter text editor

> John McMonagle wrote:
> > Gigs_ wrote:
> >> I'm writing text editor.
> >>
> >> How to enable/disable (cut, copy etc.) when text is selected/not 
> >> selected
> >
> >
> > Bind the Button1-ButtonRelease event to a function which checks the 
> > length of the SEL tag of the text widget.  If it is zero length, 
> > disable the appropriate menu entries, if it is non-zero, enable the 
> > appropriate menu entries.
> >
> > Simple example:
> >
> >
> > from Tkinter import *
> > root = Tk()
> >
> > textWidget = Text(root)
> > textWidget.pack()
> >
> > def onButton1Release(event):
> >     if len(textWidget.tag_ranges(SEL)) == 0:
> >         print 'No text selected.  Disable appropriate menu entries'
> >     else:
> >         print 'Some text selected.  Enable appropriate menu entries'
> >
> > textWidget.bind('<Button1-ButtonRelease>', onButton1Release)
> >
> > root.mainloop()
> >
> thx, but what i dont know is how to change state on menu item.
> I dont know how to access that menu item later.
> I know on button like
> B = Button(root)
> B.pack()
> 
> and later i change with B.config(blabla)
> 
> but on menu i have more items like
> M = Menu(root)
> i.add_command(label='one', command=show1)
> i.add_command(label='two', command=show2)
> M.add_cascade(label='File', menu=i)
> 
> how to change item: 'two'
> 

Use the entry config method of the Menu widget:

i.entryconfig('one', state=DISABLED)

Here is some recommended reading:

http://www.pythonware.com/library/tkinter/introduction/x5841-methods.htm




From sjmachin at lexicon.net  Sat Mar 31 20:22:20 2007
From: sjmachin at lexicon.net (John Machin)
Date: 31 Mar 2007 17:22:20 -0700
Subject: shelf membership
In-Reply-To: <Pine.GSO.4.62.0703311624460.24926@harper.uchicago.edu>
References: <Pine.GSO.4.62.0703311624460.24926@harper.uchicago.edu>
Message-ID: <1175386940.317989.202070@e65g2000hsc.googlegroups.com>

On Apr 1, 8:02 am, Aaron Brady <a... at uchicago.edu> wrote:
> can you shelve objects with membership?
>
> this gives you:
>
> TypeError: object does not support item assignment
> dict 0 True
> Exception exceptions.TypeError: 'object does not support item assignment'
> in  ignored
>
> > ignored is a bit mysterious.  tx in advance.
>
> from shelve import *
> class MyShelf(DbfilenameShelf):
>         def __init__(self, filename, flag='c', protocol=None,
> writeback=False, binary=None):
>                 self.__dict__['ready']=False
>                 DbfilenameShelf.__init__(self, filename, flag, protocol,
> writeback, binary)
>                 self.ready=True
>         def __setattr__(self,name,value):
>                 if not self.ready:
>                         self.__dict__[name]=value
>                 else:
>                         print name, value, self.ready
>                         self.__dict__[name]=value
>                         DbfilenameShelf.__setitem__(self,name,value)
>
> def open(filename, flag='c', protocol=None, writeback=False, binary=None):
>       return MyShelf(filename, flag, protocol, writeback, binary)

Please supply the *full* traceback, using copy/paste.



From kyosohma at gmail.com  Thu Mar 15 15:59:45 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 15 Mar 2007 12:59:45 -0700
Subject: Importing WMI in a child Thread throws an error
In-Reply-To: <mailman.4526.1172693311.32031.python-list@python.org>
References: <1172602368.563302.160060@t69g2000cwt.googlegroups.com>
	<mailman.4472.1172611846.32031.python-list@python.org>
	<1172692796.192098.300590@h3g2000cwc.googlegroups.com>
	<mailman.4526.1172693311.32031.python-list@python.org>
Message-ID: <1173988785.412251.126370@l77g2000hsb.googlegroups.com>

On Feb 28, 3:08 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> kyoso... at gmail.com wrote:
> > On Feb 27, 3:32 pm, Tim Golden <m... at timgolden.me.uk> wrote:
> >> kyoso... at gmail.com wrote:
> >>> The problem I have is that since I import WMI, it takes a long time
> >>> and we have users complaining about it. So I stuck the import
> >>> statement into a separate thread and set it to a daemon so it could do
> >>> its thing in the background and the rest of the script would finish
> >>> and exit.
> >> Two things:
>
> >> 1) If you run WMI in a thread, you'll need to call
> >> pythoncom.CoInitialize first:
>
> >> <code>
> >> import pythoncom
> >> import wmi
>
> >> pythoncom.CoInitialize ()
> >> c = wmi.WMI ()
> >> #
> >> # do things
> >> #
> >> pythoncom.CoUninitialize ()
> >> </code>
>
> >> 2) If you need a bit of speed running WMI, see the post
> >> I sent a few days ago to someone else:
>
> >>http://mail.python.org/pipermail/python-win32/2007-February/005550.html
>
> >> TJG
>
> > Thanks! This works for my problem. It appears to cut the real time
> > required for my script to run by 30-50%. I tried to figure out how to
> > apply your answer to the other fellow, but I am actually querying WMI
> > for the amount of RAM and the CPU type and I just don't see how to use
> > your example in these cases. I am new to the WMI paradigm.
>
> If you want to post some specific code examples, I'm
> happy to talk you through possible optimisations.
>
> TJG

Sorry I didn't reply right away. Here's the straight WMI code I'm
using:

c = wmi.WMI()
    for i in c.Win32_ComputerSystem():
        mem = int(i.TotalPhysicalMemory)
        compname = i.Name
for i in c.Win32_Processor ():
        cputype = i.Name

This code was wrapped in your CoInitialize com objects.

Let me know if you need more code.

Mike



From bj_666 at gmx.net  Thu Mar  8 05:48:29 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 08 Mar 2007 11:48:29 +0100
Subject: splitting common functions into a sepperate module
References: <1173343524.284223.165280@q40g2000cwq.googlegroups.com>
	<45efd90d$0$24707$426a74cc@news.free.fr>
	<1173348733.037351.229990@64g2000cwx.googlegroups.com>
Message-ID: <pan.2007.03.08.10.48.28.846589@gmx.net>

In <1173348733.037351.229990 at 64g2000cwx.googlegroups.com>, jonkersbart
wrote:

>> - wrapping the functions as methods of a class, passing the whole state
>> as args to the class initializer.
> I already considerate this one, but I don't like it because it is not
> correct in terms of the object-oriented concept.

Why?  I thought combining state/data and related functions into one object
is a key concept of OOP.

Ciao,
	Marc 'BlackJack' Rintsch


From aleax at mac.com  Fri Mar  2 22:25:13 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 2 Mar 2007 19:25:13 -0800
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
Message-ID: <1hud4hf.r52pr7wyx0adN%aleax@mac.com>

Hallvard B Furuseth <h.b.furuseth at usit.uio.no> wrote:

> Does this class need anything more?
> Is there any risk of a lookup loop?
> Seems to work...
> 
> class attrdict(dict):
>     """Dict where d['foo'] also can be accessed as d.foo"""
>     def __init__(self, *args, **kwargs):
>         self.__dict__ = self
>         dict.__init__(self, *args, **kwargs)
>     def __repr__(self):
>         return dict.__repr__(self).join(("attrdict(", ")"))

The problem is mostly that, given an instance a of attrdict, whether you
can call (e.g.) a.update(foo) depends on whether you ever set
a['update'], making the whole program extremely fragile -- a very high
price to pay for some modest amount of syntax sugar.


Alex


From paul at boddie.org.uk  Thu Mar 22 18:16:18 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 22 Mar 2007 15:16:18 -0700
Subject: ZSI, SOAP and .NET web services - problem
In-Reply-To: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
References: <dgx4q3nt22fz$.jto3kmho76ea$.dlg@40tude.net>
Message-ID: <1174601778.265147.72240@e1g2000hsg.googlegroups.com>

Jaroslaw Zabiello wrote:
>
> I tried to use different library - SOAPpy, but I couldn't. It requires
> fpconst library which cannot be installed because its server does not
> respond at all.

Locating fpconst has been quite a challenge in the past, but a search
for "fpconst" on Google yielded the Python Package Index entry pretty
quickly:

http://cheeseshop.python.org/pypi/fpconst/0.7.2

I believe the package archive is available directly from the above
location, but you can also find source packages for various GNU/Linux
distributions, BSDs, and so on. On the first search results page there
were links to such details for Fedora, FreeBSD, Darwin and Debian.

Paul



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar  7 17:00:59 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 07 Mar 2007 23:00:59 +0100
Subject: catching exceptions from an except: block
In-Reply-To: <45EF260C.6000205@websafe.com>
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<45EF260C.6000205@websafe.com>
Message-ID: <45ef2e12$0$28891$426a74cc@news.free.fr>

Larry Bates a ?crit :
(snip)

> def d(x):
>     if isinstance(x, basestring):
>         #
>         # Code here for string
>         #
>     elif isinstance(x, int):
>         #
>         # Code here for int
>         #
>     elif isinstance(x, float):
>         #
>         # Code here for string
>         #
>     else:
>         raise ValueError

As a side note : While there are a few corner cases where this is hardly 
avoidable (and yet I'd rather test on interface, not on concrete type), 
this kind of cose is exactly what OO polymorphic dispatch is supposed to 
avoid (no, don't tell me: I know you can't easily add methods to most 
builtin types).


From bignose+hates-spam at benfinney.id.au  Wed Mar 21 18:24:33 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 Mar 2007 09:24:33 +1100
Subject: Python 3000 idea: reversing the order of chained assignments
References: <ets9hc$74f$1@news.onet.pl>
Message-ID: <87fy7y44m6.fsf@benfinney.id.au>

Marcin Ciura <marcin.ciura at poczta.NOSPAMonet.pl> writes:

>    node = node.next = nextnode
>
> only to discover that Python performs chained assignments
> backwards compared to other languages, i.e. left-to-right
> instead of right-to-left.

What makes you think so?

    >>> a = "foo"
    >>> b = "bar"
    >>> c = "baz"
    >>> a = b = c
    >>> a, b, c
    ('baz', 'baz', 'baz')

-- 
 \        "During my service in the United States Congress, I took the |
  `\                 initiative in creating the Internet."  -- Al Gore |
_o__)                                                                  |
Ben Finney



From steven.bethard at gmail.com  Tue Mar 13 15:54:47 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Tue, 13 Mar 2007 13:54:47 -0600
Subject: Setting Up SOAPpy for Python v2.5 on Windows?
In-Reply-To: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
References: <1173812004.428519.195560@s48g2000cws.googlegroups.com>
Message-ID: <J_idnU1I89cXnGrYnZ2dnUVZ_uninZ2d@comcast.com>

Steve wrote:
> What are the required version of the SOAPpy, PyXML, fpconst that are
> needed to run under the Python 2.5 environment on Windows?

If you're not married to SOAPpy, you can use elementsoap which has just 
a single download and works with ElementTree from the 2.5 stdlib:

     http://effbot.org/downloads/#elementsoap


STeVe


From MonkeeSage at gmail.com  Mon Mar  5 17:32:42 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 5 Mar 2007 14:32:42 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <mailman.4693.1173129006.32031.python-list@python.org>
References: <mailman.4693.1173129006.32031.python-list@python.org>
Message-ID: <1173133962.488310.80120@n33g2000cwc.googlegroups.com>

On Mar 5, 1:03 pm, "Steven W. Orr" <ste... at syslang.net> wrote:
> I have a list ll of intergers. I want to see if each number in ll is
> within the range of 0..maxnum

How about:

maxnum = 100
inlist = range(90, 120)
for i in [i for i in inlist if i >= 0 and i <= maxnum]:
    # do something with i, it's in the valid range
    print i

Regards,
Jordan



From carsten at uniqsys.com  Wed Mar 14 09:48:22 2007
From: carsten at uniqsys.com (Carsten Haese)
Date: Wed, 14 Mar 2007 09:48:22 -0400
Subject: Mocking OpenOffice in python?
In-Reply-To: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
Message-ID: <1173880102.3459.26.camel@dot.uniqsys.com>

On Wed, 2007-03-14 at 01:39 -0700, PaoloB wrote:
> Hi everyone,
> 
> during our development, we need to write some unit tests that interact
> with OpenOffice through pyUno.
> 
> Is there anyone who has got any experience on it? As OpenOffice is
> quite a large beast, and interaction is rather complex, I would like
> to know if there is someone who is willing to share experience (and,
> possibly, code).

I have some experience with pyuno, but your question is very open-ended.
It would be helpful if you asked specific questions or gave more
background on what kind of interaction you're trying to achieve.

The generic answer to your request for code examples is that there's a
tutorial with example code at
http://udk.openoffice.org/python/python-bridge.html, and then there's
the API documentation at
http://api.openoffice.org/DevelopersGuide/DevelopersGuide.html.

-Carsten




From tjreedy at udel.edu  Wed Mar 28 13:25:20 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 28 Mar 2007 13:25:20 -0400
Subject: very strange syntax errors
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
Message-ID: <eue8e0$aeh$1@sea.gmane.org>


"hg" <hg at nospam.org> wrote in message 
news:l4xOh.107071$ia7.61865 at newsfe14.lga...
| I'v been facing some very strange errors lately:
| one example:
|
| def __init__(self):
| ....
|        import my_info
|        some_text = my_info.T_SOME_TEXT
|                                      ^ syntax error
|
| I manage to get rid of that one by moving the import on top of my file.
| Note: Python 2.4.1 under Windows
| Any clue ?

Mixing tabs and spaces and not matching (s and 's are typical causes.







From silverfrequent at gmail.com  Fri Mar  2 17:26:08 2007
From: silverfrequent at gmail.com (Silver Rock)
Date: Fri, 2 Mar 2007 19:26:08 -0300
Subject: classes and functions
Message-ID: <e416e10c0703021426h68e13d87qeab5a61d36980c2@mail.gmail.com>

Friends,

I don?t see why using classes.. functions does everything already. I
read the Rossum tutotial and two other already.

Maybe this is because I am only writing small scripts, or some more
serious misunderstandings of the language.

Please give me a light.

thanks guys,
Claire


From carl.douglas at gmail.com  Wed Mar 21 22:46:18 2007
From: carl.douglas at gmail.com (Carl Douglas)
Date: Thu, 22 Mar 2007 13:46:18 +1100
Subject: [Swig-user] How to receive a FILE* from Python under MinGW?
In-Reply-To: <yBjMh.18122$6.14978@tornado.fastwebnet.it>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5374.1174456615.32031.python-list@python.org>
	<yBjMh.18122$6.14978@tornado.fastwebnet.it>
Message-ID: <6f7c837c0703211946m3476f362t42281230f731cf7a@mail.gmail.com>

On 3/22/07, Giovanni Bajo <noway at ask.me> wrote:
> On 21/03/2007 6.49, Carl Douglas wrote:
>
> > Hi John,
> >
> > In my case, all I needed was a PyFile_AsFile to get the File *.
> > However I found that Python errors going to stdout/stderr were not
> > being redirected properly when my code was linking to a different
> > version of the CRT than the build of Python I was using.
> >
> > In the end, I came up with one of two solutions, and I really don't
> > like recommending either:
>
> I suggest people to try my GCC 4.1.2 binary installer for Windows which fully
> integrates with Python and has scripts in place to solve the MSVCR71.DLL
> problem. It was announced on this very list a few days ago:
>
> http://www.develer.com/oss/GccWinBinaries
>
> Feedback is welcome!
> --
> Giovanni Bajo
> --
> http://mail.python.org/mailman/listinfo/python-list
>

Hi Giovanni,

I was wondering if gccmrt can be used with older 3.x versions of GCC?

Thanks


From dickinsm at gmail.com  Sun Mar 11 11:31:13 2007
From: dickinsm at gmail.com (Mark Dickinson)
Date: 11 Mar 2007 08:31:13 -0700
Subject: Signed zeros:  is this a bug?
Message-ID: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>

I get the following behaviour on Python 2.5 (OS X 10.4.8 on PowerPC,
in case it's relevant.)

>>> x, y = 0.0, -0.0
>>> x, y
(0.0, 0.0)
>>> x, y = -0.0, 0.0
>>> x, y
(-0.0, -0.0)

I would have expected y to be -0.0 in the first case, and 0.0 in the
second.  Should the above be considered a bug, or is Python not
expected to honour signs of zeros?  I'm working in a situation
involving complex arithmetic where branch cuts, and hence signed
zeros, are important, and it would be handy if the above code could be
relied upon to do the right thing.

Mark



From buzzard at urubu.freeserve.co.uk  Tue Mar 13 22:24:06 2007
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Wed, 14 Mar 2007 02:24:06 +0000
Subject: number generator
In-Reply-To: <55osfiF25uqm7U1@mid.individual.net>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>	<pan.2007.03.09.16.34.18.818584@REMOVE.THIS.cybersource.com.au>	<55fbgjF2492skU1@mid.individual.net>	<1173573654.009953.266280@30g2000cwc.googlegroups.com>	<7xbqj01u9c.fsf@ruckus.brouhaha.com>	<slrnevae8j.dr9.nick@irishsea.home.craig-wood.com>	<01f501c7653e$1ee8cee0$03000080@hendrik>
	<mailman.5027.1173810470.32031.python-list@python.org>
	<55osfiF25uqm7U1@mid.individual.net>
Message-ID: <45f76346.0@entanet>

greg wrote:
> Gabriel Genellina wrote:
> 
>> The 5th number is not "random".
> 
> 
> More precisely, the fifth number is not *independent*
> of the others. You can't have five independent random
> numbers that sum to 50; only four independent numbers
> plus a dependent one.
> 
> -- 
> Greg

In the interests of precision, that should probably read "are
constrained to sum to 50"; it's quite possible to generate a sequence of
independent random variates that just happen to sum to 50 (as I'm sure
you know).

A fairly efficient way of generating random multinomial variates (which
would satisfy the OP's problem) is based on generating sequences of
independent Poisson variates (with suitably chosen parameters) and then
incrementing the counts in an appropriate fashion.  A fair chunk of code
is pasted below.  (If anyone knows of any more efficient methods I'd be
interested.)

Duncan

----------------------------------------------------

import math
import random

def multinomial_variate(probs, n):
    """
    Returns a random multinomial variate
    with parameters I{probs} and I{n}.

    @type  probs: sequence of C{floats}
    @param probs: multinomial probabilities
    @type      n: C{int}
    @param     n: total
    @rtype:       C{list} of C{floats}
    @return:      multinomial variate
    """
    k = len(probs)
    root_n = round(n**0.5)
    if k > root_n:
        lambda_hat = n - root_n - (k - root_n)**0.5
    else:
        lambda_hat = n - k
    gens = [gen_poisson(p * lambda_hat) for p in probs]
    gen_obs = gen_discrete(probs)
    while True:
        samp = [gen.next() for gen in gens]
        tot = sum(samp)
        if tot == n:
            break
        elif tot < n:
            for _ in xrange(n - tot):
                samp[gen_obs.next()] += 1
            break
    return samp

def _alias_table(probs):
    """
    Returns lists of aliases and cutoffs (see Kronmal and
    Peterson, 1979, I{The American Statistician}, Vol.33,
    No.4., pp. 214-218).

    @type  probs: sequence of I{floats}
    @param probs: sequence of probabilities
    @rtype:       C{tuple} of C{lists}
    @return:      a C{list} of aliases and a C{list}
                  of cutoffs
    """
    n = len(probs)
    r = [n * p for p in probs] # mean of r is 1
    a = [0] * n
    G = set()
    S = set()
    # partition r into values lower and higher than mean
    for i, val in enumerate(r):
        if val < 1:
            S.add(i)
        else:
            G.add(i)
    while True:
        try:
            j, k = S.pop(), G.pop()
        except KeyError:
            break
        a[j] = k
        r[k] += r[j] - 1
        if r[k] < 1:
            S.add(k)
        else:
            G.add(k)
    return a, r

def gen_discrete(probs):
    """
    Generates discrete (0, 1, ..., I{n}-1) variates from the
    density defined by I{probs} by the alias method.

    @type   probs: sequence of C{floats}
    @param  probs: probabilities of corresponding values
    @rtype:        generator of I{ints}
    @return:       generator of independent discrete variates
    """
    a, r = _alias_table(probs)
    n = len(probs)
    rand = random.random
    while True:
        rnd_n = rand() * n
        i = int(rnd_n)
        if rnd_n - i < r[i]:
            yield i
        else:
            yield a[i]

def gen_poisson(lambd):
    """
    Generates random Poisson variates with parameter I{lambd}.

    @type   lambd: C{float}
    @param  lambd: mean of Poisson pmf
    @rtype:        generator of I{ints}
    @return:       generator of independent Poisson variates
    """
    if lambd < 10:
        rand = random.random
        L = math.exp(-lambd)
        while True:
            k = 0
            p = 1
            while p >= L:
                k += 1
                p *= rand()
            yield k - 1
    else:
        alpha = int(7 * lambd / 8)
        gamma_var = random.gammavariate
        while True:
            X = gamma_var(alpha, 1)
            if X < lambd:
                new_lambd = lambd - X
                yield alpha + poisson_variate(new_lambd)
            else:
                yield binomial_variate(alpha - 1, lambd / X)

def poisson_variate(lambd):
    """
    Returns a random Poisson variate with parameter I{lambd}.

    @type   lambd: C{float}
    @param  lambd: mean of Poisson pmf
    @rtype:        I{int}
    @return:       Poisson variate
    """
    if lambd < 10:
        rand = random.random
        L = math.exp(-lambd)
        k = 0
        p = 1
        while p >= L:
            k += 1
            p *= rand()
        return k - 1
    else:
        a = int(7 * lambd / 8)
        X = random.gammavariate(a, 1)
        if X < lambd:
            new_lambd = lambd - X
            return a + poisson_variate(new_lambd)
        else:
            return binomial_variate(a - 1, lambd / X)

def binomial_variate(n, p):
    """
    Returns a random binomial variate with parameters I{n}
    and I{p}.

    @type  n: C{int}
    @param n: number of trials
    @type  p: C{float}
    @param p: probability of success
    @rtype:   I{int}
    @return:  number of successful trials
    """
    if n < 10:
        rand = random.random
        res = 0
        for _ in range(n):
            if rand() < p:
                res += 1
        return res
    else:
        a = 1 + n // 2
        b = n - a + 1
        X = random.betavariate(a, b)
        if X >= p:
            return binomial_variate(a - 1, p / X)
        else:
            return a + binomial_variate(b - 1, (p - X) / (1 - X))

------------------------------------------------------


From martinunsal at gmail.com  Tue Mar  6 11:24:04 2007
From: martinunsal at gmail.com (Martin Unsal)
Date: 6 Mar 2007 08:24:04 -0800
Subject: Project organization and import
In-Reply-To: <45ed41f7$0$21515$426a74cc@news.free.fr>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
	<45ed41f7$0$21515$426a74cc@news.free.fr>
Message-ID: <1173198244.092412.17400@n33g2000cwc.googlegroups.com>


Bruno Desthuilliers wrote:
> <imho>
> Which is not a problem. reload() is of very limited use for any
> non-trivial stuff.
> </imho>

Now that I've heard this from 5 different people it might be sinking
in. :) :) I really do appreciate all of you taking the time to explain
this to me.

When I started using Python a few years ago I was very excited about
the fact that it was an interpreted language and offered a more
interactive workflow than the old compile-link-test workflow. As my
project has grown to be pretty sizeable by Python standards, I tried
to continue taking advantage of the tight, reload-based, interpreted-
language workflow and it's become really cumbersome, which is
disappointing. However y'all are right, giving up on reload() doesn't
mean Python is inadequate for large projects, just that it doesn't
live up entirely to what I perceived as its initial promise. Once I
adjust my mindset and workflow for a life without reload(), I'll
probably be better off.

I'd like to point out something though. More than one of the people
who responded have implied that I am bringing my prior-language
mindset to Python, even suggesting that my brain isn't built for
Python. ;) In fact I think it's the other way around. I am struggling
to take full advantage of the fact that Python is an interpreted
language, to use Python in the most "Pythonic" way. You guys are
telling me that's broken and I should go back to a workflow that is
identical in spirit, and not necessarily any faster than I would use
with a compiled language. While that might be the right answer in
practice, I don't feel like it's a particularly "good" answer, and it
confirms my initial impression that Python package management is
broken.

I think you should be asking yourselves, "Did we all abandon reload()
because it is actually an inferior workflow, or just because it's
totally broken in Python?"

I have one question left but I'll ask that in a separate post.

Martin



From jeff at jmcneil.net  Mon Mar  5 20:58:32 2007
From: jeff at jmcneil.net (Jeff McNeil)
Date: Mon, 5 Mar 2007 20:58:32 -0500
Subject: Webserver balance load
In-Reply-To: <45ecc2bf$0$8739$ed2619ec@ptn-nntp-reader02.plus.net>
References: <1173124034.130806.316750@30g2000cwc.googlegroups.com>
	<45ecc2bf$0$8739$ed2619ec@ptn-nntp-reader02.plus.net>
Message-ID: <82d28c40703051758t7b2b26crba5f93a64ba18e94@mail.gmail.com>

If you're willing to spend some serious dollars, there are also hardware
products out there that do this type of stuff.  We run a few F5 6800 E
systems. I've come to love their iRules feature - a TCL-based event driven
scripting system for network traffic. RAM cache, SSL offload, and so on.
They'll even tunnel thousands of front-end connections through a few HTTP
KeepAlive sessions on the backend.

The downsides to something like that are a) price and b) they use a SNAT
approach so all client source addresses on the web system are that of the
internal local interface on the load balancer (though there are other
approachs if that bothers you - DSR/N-Path, I replace source in the logs
with X-Forwarded-For.split(",")[0]).

There's also mod_proxy + mod_proxy_balancer:
http://httpd.apache.org/docs/2.2/mod/mod_proxy_balancer.html

Note that while all of these systems will provide better load distribution,
they will not provide H/A unless they're configured in a cluster config as a
standalone load balancer is still a single point of failure.

-Jeff

On 3/5/07, Michael <ms at cerenity.org> wrote:
>
> Johny wrote:
>
> > Can anyone suggest a way how to balance load on Apache server where I
> > have Python scripts running?
> > For example I have 3 webservers( Apache servers) and I would like to
> > sent user's request to one of the three server depending on a load on
> > the server.
>
> To be honest, you're best looking at the Linux Virtual Server project.
> It's
> really cool technology and scales extremely well. You can do things at a
> higher level, but LVS does work and scale extremely well. VS-TUN is
> particularly useful if you have an unusual network topology.
>
> http://www.linuxvirtualserver.org/
>
>
> Michael.
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
-------------- next part --------------
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From manpreetsk at gmail.com  Wed Mar 14 05:16:56 2007
From: manpreetsk at gmail.com (Manpreet Singh Khurana)
Date: Wed, 14 Mar 2007 14:46:56 +0530
Subject: how to catch system errors in python
Message-ID: <ce777fc10703140216x36650b25t58c421d8c797b3c6@mail.gmail.com>

Hi,
    I am using paramiko 1.5.3 with python 2.4 and pycrypto 1.9
 I need to know if it is possible to catch sysytem level error, like
"disk space full" or "cpu usage indication" etc.

Any help would be appriciated.

Regards,

MSK


From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Tue Mar 20 21:10:53 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Wed, 21 Mar 2007 02:10:53 +0100
Subject: Idiom for running compiled python scripts?
References: <pan.2007.03.21.00.37.14@mailinator.com>
Message-ID: <56bf0tF28fcm6U1@mid.individual.net>

Mark wrote:

> E.g. say I have a python script "myprog.py". I could just execute
> that directly each time but that means it is "compiled" each time
> I run it which is not efficient and adds to startup time. 

Did you measure the performance hit in your case?

> I have one of these stubs for all my python scripts I've created
> so far. Is there not a better way? Do I have to create a separate
> stub each time? I find it a bit messy to require a pair of scripts
> for each utility and it also contributes some inefficiency. Given
> the above stub is so boilerplate, why does python not provide a
> general stub/utility mechanism for this?

I've noticed that calling the interpreter with pre-compiled pyc
files also works.

Regards,


Bj?rn


-- 
BOFH excuse #68:

only available on a need to know basis



From jzgoda at o2.usun.pl  Tue Mar 27 09:37:36 2007
From: jzgoda at o2.usun.pl (Jarek Zgoda)
Date: Tue, 27 Mar 2007 15:37:36 +0200
Subject: socket read timeout
In-Reply-To: <U39Oh.178798$BK1.144837@newsfe13.lga>
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
Message-ID: <eub6un$k3d$3@nemesis.news.tpi.pl>

hg napisa?(a):

> I am looking for the most efficient / cleanest way to implement a socket
> read with timeout (Windows mainly but would be great if the same code
> worked under *nix)

Did you see http://www.timo-tasi.org/python/timeoutsocket.py ?

-- 
Jarek Zgoda

"We read Knuth so you don't have to."


From aleax at mac.com  Sat Mar  3 00:03:10 2007
From: aleax at mac.com (Alex Martelli)
Date: Fri, 2 Mar 2007 21:03:10 -0800
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1172895832.352834.313300@p10g2000cwp.googlegroups.com>
Message-ID: <1hud90j.zf49afwqrk0bN%aleax@mac.com>

MonkeeSage <MonkeeSage at gmail.com> wrote:

> On Mar 2, 9:25 pm, a... at mac.com (Alex Martelli) wrote:
> > The problem is mostly that, given an instance a of attrdict, whether you
> > can call (e.g.) a.update(foo) depends on whether you ever set
> > a['update'], making the whole program extremely fragile -- a very high
> > price to pay for some modest amount of syntax sugar.
> 
> How about something like...
> 
> class attrdict(dict):
>     def __init__(self, *args, **kwargs):
>         dict.__init__(self, *args, **kwargs)
>         for k, v in self.items():
>             dict.__setattr__(self, str(k), v)
>     def __setitem__(self, k, v):
>         dict.__setitem__(self, k, v)
>         dict.__setattr__(self, str(k), v)
>     __setattr__ = __setitem__

Same problem: after x=attrdict(), x.update(foo) will work for a while,
then suddenly stop working after some innocuous loop such as:
    for bah in yech: x[bah] = 23
when one of the items in yech just happens to be the word 'update'
(similar issues with words such as 'get', 'pop', 'clear', etc, etc).

Miscegenation between attributes and items *inevitably* sucks.


Alex


From marco at waven.com  Wed Mar 21 03:41:28 2007
From: marco at waven.com (Marco)
Date: Wed, 21 Mar 2007 15:41:28 +0800
Subject: How to set SA_RESTART flag in Python
Message-ID: <5c62a320703210041r52e51e5cqc72d7a899ab17e63@mail.gmail.com>

Hi,
 I want to set SA_RESTART flag to restart a system-call. How to do
this in Python?

Thank you!


-- 
LinuX Power


From attn.steven.kuo at gmail.com  Wed Mar 14 17:48:35 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 14 Mar 2007 14:48:35 -0700
Subject: string formatting: engineering notation
In-Reply-To: <et9l3u$e57$1@ruby.cit.cornell.edu>
References: <et9l3u$e57$1@ruby.cit.cornell.edu>
Message-ID: <1173908915.676706.176140@l75g2000hse.googlegroups.com>

On Mar 14, 1:14 pm, Darren Dale <d... at cornell.edu> wrote:
> Does anyone know if it is possible to represent a number as a string with
> engineering notation (like scientific notation, but with 10 raised to
> multiples of 3: 120e3, 12e-6, etc.). I know this is possible with the
> decimal.Decimal class, but repeatedly instantiating Decimals is inefficient
> for my application (matplotlib plotting library). If it is not currently
> possible, do you think the python devs would be receptive to including
> support for engineering notation in future releases?


Do you also consider this to be too inefficient?


import math

for exponent in xrange(-10, 11):
    flt = 1.23 * math.pow(10, exponent)
    l = math.log10(flt)
    if l < 0:
        l = l - 3
    p3 = int(l / 3) * 3
    multiplier = flt / pow(10, p3)
    print '%e => %fe%d' % (flt, multiplier, p3)

--
Hope this helps,
Steven



From oliphant.travis at ieee.org  Wed Mar 14 13:14:17 2007
From: oliphant.travis at ieee.org (Travis Oliphant)
Date: Wed, 14 Mar 2007 10:14:17 -0700
Subject: Python equivalents to MATLAB str2func, func2str, ischar, isfunc?
In-Reply-To: <1173891444.243400.41690@e65g2000hsc.googlegroups.com>
References: <1173891444.243400.41690@e65g2000hsc.googlegroups.com>
Message-ID: <et9ahl$ksm$1@sea.gmane.org>

dmitrey wrote:
> I can't find these via web serch
>

You won't find exact equivalents.  But, the same functionality is 
available.  Perhaps you would like to show us what you are trying to do 
in Python.

Python's eval has some similarity with str2func

Python's repr() or str() has some similarity with func2str

ischar(A)  is similiar to isinstance(A, str)

isfunc  is similiar to callable

-Travis

P.S.  (if you are using NumPy, then there are other possibilities as well.



From robert.kern at gmail.com  Thu Mar  1 12:58:08 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Thu, 01 Mar 2007 11:58:08 -0600
Subject: Python on a mac: how to build pythonw?
In-Reply-To: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>
References: <rNOSPAMon-4C680A.09462901032007@news.gha.chartermi.net>
Message-ID: <es747i$qlu$1@sea.gmane.org>

Ron Garret wrote:
> I'm trying to run the Python examples distributed with XCode and they 
> all give me the same error:
> 
> Traceback (most recent call last):
>   File "checktext.py", line 35, in <module>
>     main()
>   File "checktext.py", line 8, in main
>     pathname = EasyDialogs.AskFileForOpen(message='File to check 
> end-of-lines in:')
>   File "/usr/local/lib/python2.5/plat-mac/EasyDialogs.py", line 650, in 
> AskFileForOpen
>     _interact()
>   File "/usr/local/lib/python2.5/plat-mac/EasyDialogs.py", line 53, in 
> _interact
>     AE.AEInteractWithUser(50000000)
> MacOS.Error: (-1713, 'no user interaction is allowed')
> 
> Googling reveals that the answer is to use pythonw, but there is no such 
> thing installed on my system:
> 
> [ron at mickey:~]$ pythonw
> -bash: pythonw: command not found
> 
> Apparently, pythonw didn't get built when I installed Python 2.5, and I 
> can't find any instructions on how to build it.  (The installation 
> instructions don't seem to mention it.)

It looks like you built Python yourself. The default build does not allow you to
communicate with the Apple GUI. You need a framework build. I highly recommend
that you simply use the binary on www.python.org instead of building from
source. If you do want to build from source, please read the file Mac/README for
instructions.

Note that in recent versions of Python, I believe that the pythonw executable is
no longer necessary as a workaround.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From lucastorri at gmail.com  Mon Mar 12 12:40:58 2007
From: lucastorri at gmail.com (Lucas Torri)
Date: Mon, 12 Mar 2007 13:40:58 -0300
Subject: backslashes in lists
In-Reply-To: <BAY126-W58D674B7E9AF10B677D5DD37D0@phx.gbl>
References: <BAY126-W58D674B7E9AF10B677D5DD37D0@phx.gbl>
Message-ID: <b58273130703120940h52dabe7an6f96a7e454b81ec9@mail.gmail.com>

just like the same way, but replace alist -> list:

str(list).replace('\\\\','\\')


as the time you call str(object) you will have an object of type string, and
you can do whatever you want/could do with it...


what are you trying?! isn't more interesting use a hash table?

On 3/12/07, Fabio Gomes <flgoms at hotmail.com> wrote:
>
>  Nice, Lucas.
>
>   But help me again, please. What about "echoing" the list:
>
> >>> str(alist).replace('\\\\','\\')
> "['a', 'b', 'c:\\some\\path']"
>
>   Because in my script I'm echoing the list to mount lists into lists,
> like:
>
> >>> list1 = ['name', 'test']
> >>> list2 = ['path', 'c:\some\path']
> >>> list = [list1, list2]
> >>> print list
> [['name', 'test'], ['path', 'c:\\some\\path']]
>
>   That's how it is coded in my script. What do you think. Is it possible
> to print "list" without the doubled backslash?
>
>   Thank again, Lucas.
>
>
> ------------------------------
> Date: Mon, 12 Mar 2007 12:15:10 -0300
> From: lucastorri at gmail.com
> To: flgoms at hotmail.com
> Subject: Re: backslashes in lists
> CC: python-list at python.org
>
> I don't know how ugly this look like, but { print
> str(alist).replace('\\\\', '\\') } works...
>
> On 3/12/07, * Fabio Gomes* <flgoms at hotmail.com> wrote:
>
>  Yes, Luca.
>
>   I noticed that printing the list item will show the string as expected.
> But I need to print the entire list in the script I'm writing and doing
> that, the list will will be repr()'ed. Is there any way to print the entire
> list without being parsed by repr()?
>
>
>
> ------------------------------
> Date: Mon, 12 Mar 2007 12:00:19 -0300
> From: lucastorri at gmail.com
> To: flgoms at hotmail.com
> Subject: Re: backslashes in lists
> CC: python-list at python.org
>
> The backslash is a key to enter especial characters, like breakline: '\n'
>
> There is two backslashes cause of this especial condition of this char,
> but if you try print the specific string you will see that only one
> backslash remain:
>
> print alist[2]
>
> On 3/12/07, *Fabio Gomes* <flgoms at hotmail.com> wrote:
>
>  Hi list,
>
>   I'm trying to use a string with backslashes in a list. But Python parses
> strings in lists with repr().
>
>
> >>> alist = ['a', 'b', 'c:\some\path']
> >>> alist
> ['a', 'b', 'c:\\some\\path']
> >>> print alist
> ['a', 'b', 'c:\\some\\path']
>
>
>   I already tried str() and raw (r) but it didn't work. All I want is to
> keep a single backslash in the string since it is a path information.
>
>   Can anyone help me, please?
>
>   Thank you.
>
> ------------------------------
> O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na
> Web e sua rede amigos. Confira! <http://spaces.live.com/signup.aspx>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
>
> ------------------------------
> Busque em qualquer p?gina da Web com alta prote??o. Obtenha o Windows Live
> Toolbar GRATUITO ainda hoje! Experimente agora! <http://toolbar.live.com/>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
>
>
> ------------------------------
> O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na
> Web e sua rede amigos. Confira! <http://spaces.live.com/signup.aspx>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From tew24 at spam.ac.uk  Wed Mar 21 13:19:23 2007
From: tew24 at spam.ac.uk (Tom Wright)
Date: Wed, 21 Mar 2007 17:19:23 +0000
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
	<pan.2007.03.21.16.25.02.135904@REMOVE.THIS.cybersource.com.au>
Message-ID: <etrper$t8g$1@gemini.csx.cam.ac.uk>

Steven D'Aprano wrote:
> You've described an extremely artificial set of circumstances: you create
> 40,000,000 distinct integers, then immediately destroy them. The obvious
> solution to that "problem" of Python caching millions of integers you
> don't need is not to create them in the first place.

I know it's a very artificial setup - I was trying to make the situation
simple to demonstrate in a few lines.  The point was that it's not caching
the values of those integers, as they can never be read again through the
Python interface.  It's just holding onto the space they occupy in case
it's needed again.

> So what's your actual problem that you are trying to solve?

I have a program which reads a few thousand text files, converts each to a
list (with readlines()), creates a short summary of the contents of each (a
few floating point numbers) and stores this summary in a master list.  From
the amount of memory it's using, I think that the lists containing the
contents of each file are kept in memory, even after there are no
references to them.  Also, if I tell it to discard the master list and
re-read all the files, the memory use nearly doubles so I presume it's
keeping the lot in memory.

The program may run through several collections of files, but it only keeps
a reference to the master list of the most recent collection it's looked
at.  Obviously, it's not ideal if all the old collections hang around too,
taking up space and causing the machine to swap.

>> but is there anything I can do to get that memory back without closing
>> Python?
> 
> Why do you want to manage memory yourself anyway? It seems like a
> horrible, horrible waste to use a language designed to manage memory for
> you, then insist on over-riding it's memory management.

I agree.  I don't want to manage it myself.  I just want it to re-use memory
or hand it back to the OS if it's got an awful lot that it's not using. 
Wouldn't you say it was wasteful if (say) an image editor kept an
uncompressed copy of an image around in memory after the image had been
closed?

-- 
I'm at CAMbridge, not SPAMbridge


From http  Tue Mar 13 21:20:53 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 17:20:53 -0800
Subject: number generator
References: <mailman.5048.1173833625.32031.python-list@python.org>
Message-ID: <7xzm6ghb7u.fsf@ruckus.brouhaha.com>

Dick Moores <rdm at rcblue.com> writes:
> I understand what zip() and random.sample() are doing, and the above
> helps me get inside the fencepost method, but I don't understand WHY
> it works, or how in the world anyone could have devised it. It is
> truly magical to me!

It's Gerald Flanagan's telegraph pole method that you quoted (I
misremembered it as "fencepost"):

    "Suppose you have a fixed telegraph pole at N and a fixed telegraph
    pole at M, and you're given 5 more telegraph poles..." (Gerard Flanagan),

Consider this diagram for the numbers from 1 to 50:

  |--------------------------------------------------|

The vertical bar at the left represents 0 and the vertical bar
at the right represents 51.  The fifty dashes represent 1,2,3...50.
You can also view the fifty dashes as a line segment of length 50.

The fencepost method is to simply chop the line segment into smaller
pieces.  You do that by choosing some random points inside the segment:

    >>> import random
    >>> random.sample(xrange(1,50), 4)
    [49, 37, 22, 5]

so mark those points with plus signs (let's see if I got this right)
and label the points from left to right, calling them p0,p1,p2,p3:

    |----+----------------+--------------+-----------+-|
         p0               p1             p2          p3

So the length of the leftmost small segment is p0-0, the length of the
second segment is p1-p0, the third is p2-p1, the fourth is p3-p2, and
the fifth is 50-p3.  So those lengths are the numbers you want.

The zip thing was just a way to avoid using messy subscripts to
compute the lengths.  Another way to do it is (untested):

   t2 = [0] + t + [50]
   lst = [(t2[i] - t2[i-1]) for i in xrange(1, len(t2))]

I'm not sure which is better from a Python stylistic perspective.
Using zip that way is fairly natural in Haskell, which I've been
fooling around with lately.  All you're doing is subtracting adjacent
elements by making two versions of the list, one of them shifted over
one place, then subtracting element by element, instead of jumping
around inside a single list, with more ways to make off-by-one errors.
It looked more symmetrical in the Python code so I did it that way.

FWIW, the actual Haskell approach would translate to something more like:

   from itertools import chain, izip
   lst = [(j-i) for i,j in izip(chain([0],t), chain(t,[50]))]

which avoids making the intermediate zipped list.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Thu Mar 22 04:47:06 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Thu, 22 Mar 2007 09:47:06 +0100
Subject: Regexp problem with `('
In-Reply-To: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
References: <1174551982.865646.38620@y80g2000hsf.googlegroups.com>
Message-ID: <46024266$0$1847$426a34cc@news.free.fr>

Johny a ?crit :
> I have  the following text
> 
> <title>Goods Item  146 (174459989)  - OurWebSite</title>
> 
> from which I need to extract
> `Goods Item  146 '
> 
> Can anyone help with regexp?

Sure : the documentation is here:
http://docs.python.org/lib/module-re.html

And there's a nice tutorial here:
http://www.amk.ca/python/howto/regex/

Read all this, try to solve your problem, and come back with what you've 
done so far if you need more help.

> Thank you for help

You're welcome.


From johnpenk7 at yahoo.com  Mon Mar 26 11:51:20 2007
From: johnpenk7 at yahoo.com (jp)
Date: 26 Mar 2007 08:51:20 -0700
Subject: PMW widget - skip tabbing to it
Message-ID: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>

I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
I skip over these widgets when using the tab key?

Thank you,
John



From mark at agtechnical.co.uk  Sun Mar 25 13:04:01 2007
From: mark at agtechnical.co.uk (mark at agtechnical.co.uk)
Date: 25 Mar 2007 10:04:01 -0700
Subject: How to find <tag> to </tag> HTML strings and 'save' them?
Message-ID: <1174842241.781281.72500@p77g2000hsh.googlegroups.com>

Hi All,

Apologies for the newbie question but I've searched and tried all
sorts for a few days and I'm pulling my hair out ;[

I have a 'reference' HTML file and a 'test' HTML file from which I
need to pull 10 strings, all of which are contained within <h2> tags,
e.g.:
<h2 class=r><a href="http://www.someplace.com/">Go Someplace</a></h2>

Once I've found the 10 I'd like to write them to another 'results'
html file. Perhaps a 'reference results' and a 'test results' file.
>From where I would then like to 'diff' the results to see if they
match.

Here's the rub: I cannot find a way to pull those 10 strings so I can
save them to the results pages.
Can anyone please suggest how this can be done?

I've tried allsorts but I've been learning Python for 1 week and just
don't know enough to mod example scripts it seems. don't even get me
started on python docs.. ayaa ;] Please feel free to teach me to suck
eggs because it's all new to me :)

Thanks in advance,

Mark.



From bdesth.quelquechose at free.quelquepart.fr  Tue Mar  6 06:01:09 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Tue, 06 Mar 2007 12:01:09 +0100
Subject: Project organization and import
In-Reply-To: <1173167617.207318.22400@h3g2000cwc.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
	<mailman.4685.1173114917.32031.python-list@python.org>
	<1173119492.198000.252500@v33g2000cwv.googlegroups.com>
	<45ec9ba3$0$2333$426a34cc@news.free.fr>
	<1173167617.207318.22400@h3g2000cwc.googlegroups.com>
Message-ID: <45ed41f7$0$21515$426a74cc@news.free.fr>

Martin Unsal a ?crit :
> On Mar 5, 3:11 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>>Your own experience *with Python* ?
> 
> 
> No, my experience with Visual Basic. ;)
> 
> Of course my experience with Python!

Sorry but this was really not obvious.

> Sorry, I can continue writing snarky replies to your snarky comments
> but that won't get us anywhere productive. 

You're right - sorry.

> Instead I think the
> following really gets to the crux of the issue.
>  
>>May I say that the problem here comes from your insistance on putting
>>each class in a single module ?
>  
> No, it doesn't.
> 
> It really doesn't matter how many classes you have in a module; either
> you use "from foo import bar", or you are stuck with a file structure
> that is isomorphic to your design namespace.
> 
> The former breaks reload;

<imho>
Which is not a problem. reload() is of very limited use for any 
non-trivial stuff.
</imho>



From duncan.booth at invalid.invalid  Fri Mar  2 04:22:50 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 2 Mar 2007 09:22:50 GMT
Subject: Lists: Converting Double to Single
References: <slrneu70bs.hjp.rshepard@salmo.appl-ecosys.com>
	<%6QEh.6362$_73.1862@newsread2.news.pas.earthlink.net>
	<Xns98E466D3B2D45duncanbooth@127.0.0.1>
	<pan.2007.02.27.14.58.37.581918@REMOVE.THIS.cybersource.com.au>
	<Xns98E4C016371BDduncanbooth@127.0.0.1>
	<Cn9Fh.7289$tD2.3125@newsread1.news.pas.earthlink.net>
	<Xns98E55E112CCC7duncanbooth@127.0.0.1>
	<6CEFh.220$HB5.16@read3.inet.fi>
Message-ID: <Xns98E75E65A63B6duncanbooth@127.0.0.1>

Jussi Salmela <tiedon_jano at hotmail.com> wrote:

> I've run a couple of tests and it seems to me that Dennis Lee Bieber 
is 
>   on the trail of the truth when he claims that smallest magnitude to 
> the largest is the way to do the summation. Actually it isn't THE way 
> although it diminishes the error. I was sort of astonished because I 
> also had somewhere along the years formed the same notion as Dennis.
> 
> "Your" pairwise method beats the former method by a large margin 
> although I don't understand why. To tell you the truth: I started out 
to 
> show you were wrong because intuitively (for me at least) the former 
> method should work better than yours.

I think Dennis is spot on when he says that smallest to largest is the 
best way. What he has missed though is that if you have a list of 
similar sized values, then after you have added the first two together 
the next addition still needs to follow the smallest to largest rule so 
it shouldn't include the result of the first addition. One option, if 
you have access to the full list when you start, would be to reinsert 
each partial sum back into the sorted list as you calculate it: a heap 
queue might be an appropriate implementation for that.

The pairwise sum gives you most, although not quite all, of the benefit 
of sorting the data: obviously if the input values are identical it is 
almost exactly equivalent to adding the smallest values and then 
inserting the partial result back into the list. Even in the 1000000, 
0.00001 case it avoids most of the precision-losing additions such as 
500000000005.0 + 0.00001 which the simple sum hits.

Also it has the further advantages of still working with other summable 
objects (e.g. lists) so long as they are associative and not requiring 
you to know all the values or even the length of the sequence in 
advance.

For floating point you can of course use methods to preserve the lost 
bits such as the kahan sum, or even just do all imtermediate 
calculations to a higher internal precision.

By the way, I found another bug in my sumpairs: += is a very bad idea 
here if the input can contain mutables, so the relevant line should be:

            tmp[-1] = tmp[-1] + v

Once I fixed that one, so it no longer attempts to modify lists in-
place, it appears that the more balanced intermediate results give a 
benefit when summing lists as well. sumpairs on a list of lists seems to 
beat the builtin sum as soon as the length of the list exceeds about 210 
items. At 1000 items it is about 3 times faster and 30 times faster at 
10,000 items. If I get the time I think I really should code up a C 
version of sumpairs and see how that compares against Pythons builtin 
sum for numerical sums.

I guess either everyone else missed that computer science lecture I 
thought I remembered, or maybe I was the one who was asleep and I 
dreamed it all. :)


From apardon at forel.vub.ac.be  Mon Mar 26 03:43:29 2007
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 26 Mar 2007 07:43:29 GMT
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
	<pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
	<1hv9lqf.19nfi5y1hv1y4gN%aleax@mac.com>
Message-ID: <slrnf0eud1.ckl.apardon@rcpc42.vub.ac.be>

On 2007-03-20, Alex Martelli <aleax at mac.com> wrote:
> Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
>    ...
>> There are plenty of reasons for preferring new style classes. If those
>> reasons hold for you, then of course you should use new style classes.
>> 
>> But that's not the same thing as saying that you should use new style
>> classes *even when you don't care about those features*.
>
> You should always use new-style classes in order to avoid having to stop
> and make a decision each time you code a class -- having to stop and ask
> yourself "do I need any of the many extra features of new-style classes
> here, or will legacy classes suffice?" each and every time.
>
> There should ideally be only one obvious way -- and that obvious way is
> to always use new-style classes and avoid a feature that's there only
> for backwards compatibility with legacy code.

I disagree. The obvious way is to use old-style classes. IMO the obvious
way, is what a newbee will do after he has read the tutorial. And as far
as I am familiar with the tutorial someone trying out python after he
read it, will use old-style classes.

-- 
Antoon Pardon


From knipknap at gmail.com  Wed Mar 14 16:07:58 2007
From: knipknap at gmail.com (Samuel)
Date: 14 Mar 2007 13:07:58 -0700
Subject: Converting a list to a dictionary
Message-ID: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>

Hi,

is there a short version for this?

res_dict = {}
for resource in res_list:
  res_dict[resource.get_id()] = resource

This does not work:

res_dict = dict([r.get_id(), r for r in res_list])

-Samuel



From john at datavoiceint.com  Fri Mar 16 17:46:31 2007
From: john at datavoiceint.com (HMS Surprise)
Date: 16 Mar 2007 14:46:31 -0700
Subject: Executing a list of functions
Message-ID: <1174081591.638287.152370@y66g2000hsf.googlegroups.com>


Seems to me that one should be able to put the names of several
functions in a list and then have the list executed. But it seems the
output of the functions is hidden, only their return value is visible.
Is this because the list execution is another scope?

Thanx,

jh

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

def a():
    print "this is a"

def b():
    print "this is b"

lst = [a(), b()]

lst



From garylinux at gmail.com  Sat Mar  3 08:59:23 2007
From: garylinux at gmail.com (garylinux at gmail.com)
Date: 3 Mar 2007 05:59:23 -0800
Subject: A more navigable Python Library Reference page
In-Reply-To: <1172852270.824499.305880@z35g2000cwz.googlegroups.com>
References: <1172852270.824499.305880@z35g2000cwz.googlegroups.com>
Message-ID: <1172930363.422756.134650@p10g2000cwp.googlegroups.com>


>
> Google doesn't seem to let you add attachments so I've put a sample of
> the output here:http://www.qtrac.eu/libindex.html
> at the bottom of the page there is a link to the ~100 line libindex.py
> script that generated it.

I like it.  thanks.



From robert.kern at gmail.com  Mon Mar 26 15:14:37 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Mon, 26 Mar 2007 14:14:37 -0500
Subject: Does Numpy work on QNX 4.25 with Python 2.2?
In-Reply-To: <1174935710.642334.141790@d57g2000hsg.googlegroups.com>
References: <1174935710.642334.141790@d57g2000hsg.googlegroups.com>
Message-ID: <eu9633$6mg$1@sea.gmane.org>

ZMY wrote:
> I am trying to convert some old Fortran code into Python program and
> get them work on a QNX 4.25 system. Since the program requires speed,
> I think using Numpy is really necessary. But I haven't found anything
> on web about using numpy on QNX 4.25 (especially the for python
> version 2.2).

numpy requires Python 2.3+. I haven't heard of anyone trying QNX.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From null at null.null  Fri Mar 30 10:07:11 2007
From: null at null.null (nullified)
Date: Fri, 30 Mar 2007 14:07:11 GMT
Subject: Any "consumer review generators" available?
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
	<1175225665.929475.183360@n59g2000hsh.googlegroups.com>
	<0sfp03d9epf50d1o9jj22ni1al4o69ut9k@4ax.com>
	<1175263276.576403.10930@l77g2000hsb.googlegroups.com>
Message-ID: <qb6q03t7uq9j33jdvrrg6h90cpr648u56v@4ax.com>

On 30 Mar 2007 07:01:16 -0700, "Evil Otto" <zburnham at gmail.com> wrote:

>On Mar 30, 3:46 am, nullified <n... at null.null> wrote:
>> On 29 Mar 2007 20:34:26 -0700, "Evil Otto" <zburn... at gmail.com> wrote:
>>
>> >On Mar 29, 2:19 pm, aral... at aol.com wrote:
>> >> I am looking for a fake consumer review generator that could generate realistic looking reviews for any products, kind of like on amazon.com but generated by Artificial Intelligence. Is there a package available in your favorite programing language... thx alan
>>
>> >I really, really hope that you're looking to generate test data or
>> >filler text.
>>
>> >If you're not, then DIAF.
>>
>> Die In A Fire? Drop In A Fryer? Doug Is A Fucker? Drown In A Fart?
>
>Any of those would accurately describe the underlying sentiment, but I
>had "Die In A Fire" in mind specifically.

FM!, IWRFT!


From trentm at activestate.com  Thu Mar 15 12:34:28 2007
From: trentm at activestate.com (Trent Mick)
Date: Thu, 15 Mar 2007 09:34:28 -0700
Subject: ANN: ActivePython 2.5.0.0 is now available
In-Reply-To: <1173966133.061395.219360@n76g2000hsh.googlegroups.com>
References: <mailman.5030.1173815941.32031.python-list@python.org>
	<1173966133.061395.219360@n76g2000hsh.googlegroups.com>
Message-ID: <45F97594.40008@activestate.com>

dan.shechter at gmail.com wrote:
> 
> is ctypes supported on ActivePython for Windows x64?
> 

No.
http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/whatsincluded.html

My understanding (from http://www.python.org/sf/1545507) is that ctypes isn't 
yet ported to Windows/AMD64.  That may have changed though.

Trent

-- 
Trent Mick
trentm at activestate.com


From deets at nospam.web.de  Tue Mar 13 12:58:27 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 13 Mar 2007 17:58:27 +0100
Subject: CD insert/eject detection
References: <1173797681.851722.41340@64g2000cwx.googlegroups.com>
	<45F6BE29.40802@websafe.com>
	<1173798590.728979.84080@64g2000cwx.googlegroups.com>
Message-ID: <55o3hjF260p9sU1@mid.uni-berlin.de>

Mark Bryan Yu wrote:

> On Mar 13, 11:07 am, Larry Bates <lba... at websafe.com> wrote:
>> Mark Bryan Yu wrote:
>> > Hi,
>>
>> > I'm trying to make a Audio CD ripper using python.
>>
>> > is there a way (library, module, etc) to detect when a CD was inserted
>> > or ejected?
>>
>> That is going to be OS dependent, so please share with us
>> what OS you are on?
>>
>> -Larry
> 
> Linux. I guess that means i need to make a C/C++ module extension to
> do such task.

http://www-128.ibm.com/developerworks/linux/library/l-dbus.html

might be a start.

Diez


From aleax at mac.com  Tue Mar 20 11:27:07 2007
From: aleax at mac.com (Alex Martelli)
Date: Tue, 20 Mar 2007 08:27:07 -0700
Subject: any ways to judge whether an object is initilized or not in a
	class
References: <1174289858.932835.207500@y66g2000hsf.googlegroups.com>
	<566vcfF27jlu4U1@mid.uni-berlin.de>
	<1174293300.034362.282460@l75g2000hse.googlegroups.com>
	<mailman.5275.1174294145.32031.python-list@python.org>
	<pan.2007.03.20.03.41.25.886090@REMOVE.THIS.cybersource.com.au>
	<45ffa91e$0$2136$426a74cc@news.free.fr>
	<pan.2007.03.20.12.13.29.441421@REMOVE.THIS.cybersource.com.au>
Message-ID: <1hv9lqf.19nfi5y1hv1y4gN%aleax@mac.com>

Steven D'Aprano <steve at REMOVE.THIS.cybersource.com.au> wrote:
   ...
> There are plenty of reasons for preferring new style classes. If those
> reasons hold for you, then of course you should use new style classes.
> 
> But that's not the same thing as saying that you should use new style
> classes *even when you don't care about those features*.

You should always use new-style classes in order to avoid having to stop
and make a decision each time you code a class -- having to stop and ask
yourself "do I need any of the many extra features of new-style classes
here, or will legacy classes suffice?" each and every time.

There should ideally be only one obvious way -- and that obvious way is
to always use new-style classes and avoid a feature that's there only
for backwards compatibility with legacy code.

It's a specific case of the general rule "adopt good habits as
routines"; I recommend Limoncelli's excellent treatment of that subject
in his "Time Management for System Administrators" book.  By not having
to ask yourself "do I really need to do X" each and every time, but
making it an absolute and invariant habit to always do it, as long as X
is a good habit (will be useful some of the time and not damaging the
rest of the time), you save yourself time-waste, aggravation, and
useless expenditure of attention and mental energy.

> What I predict is that under the hood, Python 3 will complete the job of
> unifying types and classes. The distinction between classic classes and
> new style classes will go away. All classes will behave the same, whether
> you write "class X:" or "class X():" or "class X(object):" or whatever
> syntax Python 3 uses for defining classes.

Sure -- all the semantical peculiarity of legacy classes will disappear
(and won't be missed).  But meanwhile, no reason not to adopt good
habits.


Alex


From ziga.seilnacht at gmail.com  Thu Mar 22 12:29:00 2007
From: ziga.seilnacht at gmail.com (Ziga Seilnacht)
Date: 22 Mar 2007 09:29:00 -0700
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <y1yMh.11133$P47.69@newssvr22.news.prodigy.net>
References: <ets9hc$74f$1@news.onet.pl>
	<pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au>
	<etscd5$g0g$1@news.onet.pl>
	<7WjMh.318$YL5.80@newssvr29.news.prodigy.net>
	<1hvcadb.134pbvp1y39wi3N%aleax@mac.com>
	<DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
	<y1yMh.11133$P47.69@newssvr22.news.prodigy.net>
Message-ID: <1174580940.238038.87200@n76g2000hsh.googlegroups.com>

John Nagle wrote:
>
>     That's fascinating.  Is that a documented feature of the language,
> or a quirk of the CPython interpreter?
>
Its a documented feature of the language. From the Reference Manual:

"An assignment statement evaluates the expression list (remember that
this can be a single expression or a comma-separated list, the latter
yielding a tuple) and assigns the single resulting object to each of
the target lists, from left to right."

See: http://docs.python.org/ref/assignment.html

Ziga




From S.Mientki-nospam at mailbox.kun.nl  Mon Mar  5 17:14:10 2007
From: S.Mientki-nospam at mailbox.kun.nl (Stef Mientki)
Date: Mon, 05 Mar 2007 23:14:10 +0100
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <1173131863.216300.109120@s48g2000cws.googlegroups.com>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
	<1173131863.216300.109120@s48g2000cws.googlegroups.com>
Message-ID: <9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>

Adam Atlas wrote:
> Ah... heh, sorry, I misread your message as "a much more convenient
> way" rather than "much more than a convenient way". Anyway, I
> understand that, and I do indeed find setuptools useful and use it on
> a regular basis.
> 
> But my other points still stand. This would be a moot point if
> setuptools were part of the standard library, but it's not, and I
> don't see why people should have to bother installing it if they
> simply want to try a small package. Look at Beautiful Soup, for
> example. It's distributed as a single .py file, and that's great. With
> most modules, all I want to do is download them and plop them into my
> project directory. You can always copy it into site-packages if you
> want to access it globally, and you can always unzip it if you need to
> see the source.
> 
> So I *will* retract my statement that this could be an "alternative"
> to eggs -- ideally, it would be an addition, since it doesn't break
> compatibility at all. You could download an egg and rename it to .pyc,
> and import it like any other module, and at any point later, you could
> rename it back to .egg and use setuptools to install it if you wish.
> 
Good point to make these things much easier!

But possibly I'm the only Windows user here,
as I still find these talks all very difficult to understand,
and I really don't understand why all this complexity is necessary,
setuptools ? eggs ? zips ? pythonpaths ?

As a normal Windows user,
   I'm used to run an install file,
     and hit just 1 button.
As a normal Windows programmer,
   I'm used to create a simple Inno-setup file,
     and my users can behave as a simplistic and happy Windows user.

But I guess the needed complexity is all thanks to NIX ;-)

I think I never would have started with Python,
if I didn't bounced into the Enthought-edition.

-- 
cheers,
Stef Mientki
http://pic.flappie.nl


From http  Tue Mar 13 13:08:36 2007
From: http (Paul Rubin)
Date: 13 Mar 2007 09:08:36 -0800
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<pan.2007.03.09.15.32.01.112493@gmx.net>
	<1173515984.515050.27400@n33g2000cwc.googlegroups.com>
	<esukru$1v1$1@news2.zwoll1.ov.home.nl>
	<mailman.4919.1173560418.32031.python-list@python.org>
Message-ID: <7xbqixax63.fsf@ruckus.brouhaha.com>

"Terry Reedy" <tjreedy at udel.edu> writes:
> P(m,n)  has no known exact formula but can be computed 
> inductively rather easily.  The partitions for m and n can be ranked in 
> lexicographic order from 0 to P(m,n)-1.  Given a rank r in that range, one 
> can calculate the particular partition that has that rank.  So a 
> equi-probable random count in the range can be turned into a equi-probable 
> random partition.

I don't see an efficient way to do that, but will try to look sometime
for the book you cited.

Here is a brute force generation approach (not fully tested since
I'm using Python 2.3):

    from itertools import imap

    # yield all partitions of n having length k, with many duplications
    def _partitions(n,k):
        if k==0: return
        for i in xrange(1,n-k+1):
            for p in partitions(n-i, k-1):
                yield (i,)+p

    def unique_partitions(n,k):
         return sorted(set(tuple(sorted(p)) for p in _partitions(n,k)))

    p50_5 = unique_partitions(50,5)
    assert len(p50_5) = 2611

Note the use of a generator expression in unique_partitions to
enumerate the non-unique partitions without remembering them all in
memory.  "set" strips out the duplicates and remembers only the unique
ones.  The above takes a few seconds to run on (50,5) on my 1.2 ghz laptop.


From grahn+nntp at snipabacken.dyndns.org  Fri Mar 23 11:15:52 2007
From: grahn+nntp at snipabacken.dyndns.org (Jorgen Grahn)
Date: 23 Mar 2007 15:15:52 GMT
Subject: why brackets & commas in func calls can't be ommited? (maybe it
	could be PEP?)
References: <1174487880.610134.257840@y66g2000hsf.googlegroups.com>
	<1174493856.663144.236880@y80g2000hsf.googlegroups.com>
	<1174495236.067618.69030@l77g2000hsb.googlegroups.com>
	<RuyMh.34$ek6.6@newsfe12.lga>
	<mailman.5475.1174587773.32031.python-list@python.org>
Message-ID: <slrnf07nnt.3nr.grahn+nntp@frailea.sa.invalid>

On Thu, 22 Mar 2007 14:20:42 -0400, Steve Holden <steve at holdenweb.com> wrote:
...
> I'm in danger of getting short-tempered on c.l.py for the first time in 
> a long time. If you think that five arguments is an excessive number for 
> a function then you live in a world of toy programs.

Or at least in a world where people have good taste and time to Do It
Right(tm).

I personally believe many five-argument methods would be better off
refactored. I killed one today which had fourteen (most of which were
unused).  But I don't pretend that it's always worth the effort of
doing that, in the real world.

/Jorgen

-- 
  // Jorgen Grahn <grahn@        Ph'nglui mglw'nafh Cthulhu
\X/     snipabacken.dyndns.org>  R'lyeh wgah'nagl fhtagn!


From mcfletch at vrplumber.com  Fri Mar  2 12:35:34 2007
From: mcfletch at vrplumber.com (Mike C. Fletcher)
Date: Fri, 02 Mar 2007 12:35:34 -0500
Subject: Python GUI + OpenGL
In-Reply-To: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
Message-ID: <45E86066.3020604@vrplumber.com>

Achim Domma wrote:
> Hi,
>
> I'm developing a GUI app in Python/C++ to visualize numerical results. 
> Currently I'm using Python 2.4 with wx and PyOpenGLContext, but there 
> are no windows binaries for Python 2.5 for quite some time now.
>
> I need a OpenGL context without restrictions and some settings dialogs. 
> Is wx + PyOpenGL the way to go? Or could somebody recommend a better set 
> of tools/libs?
>
> regards,
> Achim
>   
PyOpenGL 3.x (currently in alpha state, but reasonably usable) works on 
Python 2.5, there are no binaries because the system no longer requires 
binary versions.  Install the setuptools package, then run easy_install 
PyOpenGL and the egg file should be downloaded and installed to your 
machine.  The current version doesn't package GLE along with the code, 
however, so you'll have to find a DLL for that if you need it.

HTH,
Mike

-- 
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com



From jon at ffconsultancy.com  Thu Mar 29 17:28:29 2007
From: jon at ffconsultancy.com (Jon Harrop)
Date: Thu, 29 Mar 2007 22:28:29 +0100
Subject: What are OOP's Jargons and Complexities
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
Message-ID: <460c30b1$0$8750$ed2619ec@ptn-nntp-reader02.plus.net>

Xah Lee wrote:
> As part of this new syntax and purity, where everything in a program
> is of Classes and Objects and Methods, many complex issues and concept
> have arisen in OOP from both the OOP language machinery as well as a
> engineering practice.

I think the fact that many design patterns from OOP are redundant in the
presence of functional programming is very interesting. I'd like to see
more written about this, not least because it would serve as an excellent
introduction to functional programming for the majority of programmers who
are versed only in object orientation (primarily C++, Java and C#
programmers).

There is an old paper on the GOF's OOP design patterns implemented in OCaml
but it was not written by OCaml-savvy programmers and contained many errors
and omissions. Perhaps the Lisp community have generated something better?

Also, pattern matching is fundamental to many modern functional programming
languages. Here, pattern matching is often the only way to manipulate
concrete data structures and often results in code that is both faster and
more concise than any object-oriented equivalent. I recently gave the
example of a small symbolic simplifier written in OCaml/F# that is
difficult and tedious to translate into many other languages efficiently
(including C++, Java, C# and even Lisp).

-- 
Dr Jon D Harrop, Flying Frog Consultancy
OCaml for Scientists
http://www.ffconsultancy.com/products/ocaml_for_scientists/index.html?usenet


From daftspaniel at gmail.com  Mon Mar 12 12:39:29 2007
From: daftspaniel at gmail.com (daftspaniel at gmail.com)
Date: 12 Mar 2007 09:39:29 -0700
Subject: using python to visit web sites and print the web sites image to
	files
In-Reply-To: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
References: <1173684778.539755.236130@t69g2000cwt.googlegroups.com>
Message-ID: <1173717568.915583.194060@8g2000cwh.googlegroups.com>

On Mar 12, 7:32 am, "imx" <xiong.xu... at gmail.com> wrote:
> I wonder whether python can be used to simulate a real user to do the
> following:
> 1) open a web site in a browser;
> 2) printscreen, so to copy the current active window image to
> clipboard;
> 3) save the image file to a real file
> Any pointer will be apprieciated!
> Xiong

Google pywinauto.

HTH

Davy




From MonkeeSage at gmail.com  Sat Mar  3 05:44:53 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 3 Mar 2007 02:44:53 -0800
Subject: print a ... z, A ... Z, "\n"' in Python
In-Reply-To: <mailman.4623.1172909667.32031.python-list@python.org>
References: <mailman.4623.1172909667.32031.python-list@python.org>
Message-ID: <1172918693.023586.182920@8g2000cwh.googlegroups.com>


js  wrote:
> A way I came up with is the following, but I'm sure this is ugly.

You could abuse __getitem__ (terribly, heh!) and use slice syntax...

class crange():
    def __init__(self):
        self.valid = range(47,58) + range(65,91) + range(97,123)
    def __getitem__(self, s):
        if isinstance(s, slice):
            start, stop = s.start, s.stop
            if not start: start = '0'
            if isinstance(stop, int) and stop > 122: stop = 'z'
            elif not stop: stop  = 'z'
            clist = []
            chars = range(ord(start), ord(stop)+1)
            for i in range(len(chars)):
                if chars[i] in self.valid:
                    clist.append(chr(chars[i]))
            return ''.join(clist)
        else:
            return s

cr = crange()
print cr['A':'z']
print cr['0':'8']
print cr[:]

Regards,
Jordan



From __peter__ at web.de  Thu Mar 22 09:15:59 2007
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 Mar 2007 14:15:59 +0100
Subject: Removing a particular index from a list
References: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
Message-ID: <ettveb$vti$01$1@news.t-online.com>

Srikanth wrote:

> list.remove(item) removes the first item from the list, but how do I
> say to remove a particular index from a list without using it's value?
> 
> Let's say I have 4 items in my list as
> 
>>>> li = ["sri", "s", "srikanth", "s"]
> 
> And if I want to remove the last item ("s"), how do I remove it?
> li.remove(-1) doesn't do it. 

del li[-1]

> This is my problem. 

This, or not reading the tutorial.

http://docs.python.org/tut/node7.html#SECTION007200000000000000000

Peter


From john.pye at gmail.com  Sun Mar 25 04:35:55 2007
From: john.pye at gmail.com (John Pye)
Date: 25 Mar 2007 01:35:55 -0700
Subject: How to receive a FILE* from Python under MinGW?
In-Reply-To: <mailman.5527.1174678830.32031.python-list@python.org>
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174453085.748142.48700@y80g2000hsf.googlegroups.com>
	<mailman.5376.1174457321.32031.python-list@python.org>
	<1174458909.732321.101590@n59g2000hsh.googlegroups.com>
	<mailman.5496.1174624444.32031.python-list@python.org>
	<1174625242.761663.235320@e1g2000hsg.googlegroups.com>
	<mailman.5506.1174639747.32031.python-list@python.org>
	<1174655250.614164.279240@l77g2000hsb.googlegroups.com>
	<op.tpnpzkjzx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>
	<mailman.5527.1174678830.32031.python-list@python.org>
Message-ID: <1174811755.254477.195920@l77g2000hsb.googlegroups.com>

On Mar 24, 5:37 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Fri, 23 Mar 2007 16:34:22 -0300, Gabriel Genellina
> <gagsl-... at yahoo.com.ar> escribi?:
>
> >> What about calling mscvrt_get_osfhandle from inside the SWIG wrapper?
> >> I tried this but it seemed that the function was not exported to the
> >> DLL.
>
> > The idea is to separate both worlds - _get_osfhandle must be called from
> > the C runtime used by Python, not the one linked to your extension.
>
> Ah, but you could import the msvcrt module and get it from there. *ONLY*
> get_osfhandle. The other function, open_osfhandle, must be from the
> runtime used by your extension.
>
> --
> Gabriel Genellina

Yes, that was what I was hoping might be possible. Have not had any
luck with that yet though.

Cheers
JP



From researchbase at gmail.com  Wed Mar 28 14:38:21 2007
From: researchbase at gmail.com (krishnakant Mane)
Date: Thu, 29 Mar 2007 00:08:21 +0530
Subject: newbi question on python rpc server, how it works?
Message-ID: <f81479dd0703281138r7591010vc444562e390d1265@mail.gmail.com>

hello,
searched a lot of places including google search but can't find
answers to python-rpc.  I am also very new to rpc.  I am very clear
about its meaning and where it is to be used, but not about how it is
done.
I have a need where I need to create a layer of business logic that
will connect to mysql database at one end and a wxpython based thin
client at the other end.
can some one give me basic idea as to how I can use simple xml rpc
server class of python and build an xml rpc server and then a client
which I can embed in my wxpython based thin client?
as I said I am not aware of how xml rpc works in details.
I want to creat the wxpython client app in such a way that it only
does the work of validation and display and only sending the data as
is to the xml rpc server for logic and then xml rpc server will
inturn talk to mysql.
my business logic consists of many classes which I want to put in a
package directory with __init__.py and all the other modules.
do I need to create all of them as xml rpc server instances or can I
use them into one single xml rpc server class?
at the other end I am not really understanding how the xml rpc client
can be used to get data in to my wx based gui?
for example I want to fill up a list box with data that came from the
rpc server to the client and then some how looping through the
elements sent over and putting into a list.

regards.
Krishnakant


From kay.schluehr at gmx.net  Wed Mar 28 08:12:35 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 28 Mar 2007 05:12:35 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <mailman.5685.1175032114.32031.python-list@python.org>
References: <mailman.5685.1175032114.32031.python-list@python.org>
Message-ID: <1175083955.167868.88610@n76g2000hsh.googlegroups.com>

On Mar 27, 11:48 pm, Carl Friedrich Bolz <cfb... at gmx.de> wrote:
> ==========================================
> PyPy 1.0: JIT compilers for free and more
> ==========================================
>
> Welcome to the PyPy 1.0 release - a milestone integrating the results
> of four years of research, engineering, management and sprinting
> efforts, concluding the 28 months phase of EU co-funding!
>
> Although still not mature enough for general use, PyPy 1.0 materializes
> for the first time the full extent of our original vision:
>
> - A flexible Python interpreter, written in "RPython":
>
>    - Mostly unaware of threading, memory and lower-level target platform
>      aspects.
>    - Showcasing advanced interpreter features and prototypes.
>    - Passing core CPython regression tests, translatable to C, LLVM and
> .NET.
>
> - An advanced framework to translate such interpreters and programs:
>
>    - That performs whole type-inference on RPython programs.
>    - Can weave in threading, memory and target platform aspects.
>    - Has low level (C, LLVM) and high level (CLI, Java, JavaScript)
> backends.
>
> - A **Just-In-Time Compiler generator** able to **automatically**
>    enhance the low level versions of our Python interpreter, leading to
>    run-time machine code that runs algorithmic examples at speeds typical
>    of JITs!
>
> Previous releases, particularly the 0.99.0 release from February,
> already highlighted features of our Python implementation and the
> abilities of our translation approach but the **new JIT generator**
> clearly marks a major research result and gives weight to our vision
> that one can generate efficient interpreter implementations, starting
> from a description in a high level language.
>
> We have prepared several entry points to help you get started:
>
> * The main entry point for JIT documentation and status:
>
>    http://codespeak.net/pypy/dist/pypy/doc/jit.html
>
> * The main documentation and getting-started PyPy entry point:
>
>    http://codespeak.net/pypy/dist/pypy/doc/index.html
>
> * Our online "play1" demos showcasing various Python interpreters,
>    features (and a new way to program AJAX applications):
>
>    http://play1.codespeak.net/
>
> * Our detailed and in-depth Reports about various aspects of the
>    project:
>
>    http://codespeak.net/pypy/dist/pypy/doc/index-report.html
>
> In the next few months we are going to discuss the goals and form of
> the next stage of development - now more than ever depending on your
> feedback and contributions - and we hope you appreciate PyPy 1.0 as an
> interesting basis for greater things to come, as much as we do
> ourselves!
>
> have fun,
>
>      the PyPy release team,
>      Samuele Pedroni, Armin Rigo, Holger Krekel, Michael Hudson,
>      Carl Friedrich Bolz, Antonio Cuni, Anders Chrigstroem, Guido Wesdorp
>      Maciej Fijalkowski, Alexandre Fayolle
>
>      and many others:
>      http://codespeak.net/pypy/dist/pypy/doc/contributor.html
>
> What is PyPy?
> ================================
>
> Technically, PyPy is both a Python interpreter implementation and an
> advanced compiler, or more precisely a framework for implementing dynamic
> languages and generating virtual machines for them.
>
> The framework allows for alternative frontends and for alternative
> backends, currently C, LLVM and .NET.  For our main target "C", we can
> can "mix in" different garbage collectors and threading models,
> including micro-threads aka "Stackless".  The inherent complexity that
> arises from this ambitious approach is mostly kept away from the Python
> interpreter implementation, our main frontend.
>
> PyPy is now also a Just-In-Time compiler generator.  The translation
> framework contains the now-integrated JIT generation technology.  This
> depends only on a few hints added to the interpreter source and should
> be able to cope with the changes to the interpreter and be generally
> applicable to other interpreters written using the framework.
>
> Socially, PyPy is a collaborative effort of many individuals working
> together in a distributed and sprint-driven way since 2003.  PyPy would
> not have gotten as far as it has without the coding, feedback and
> general support from numerous people.
>
> Formally, many of the current developers were involved in executing an
> EU contract with the goal of exploring and researching new approaches
> to language and compiler development and software engineering.  This
> contract's duration is about to end this month (March 2007) and we are
> working and preparing the according final review which is scheduled
> for May 2007.
>
> For the future, we are in the process of setting up structures to help
> maintain conceptual integrity of the project and to discuss and deal
> with funding opportunities related to further PyPy sprinting and
> developments. See here for results of the discussion so far:
>
>      http://codespeak.net/pipermail/pypy-dev/2007q1/003577.html
>
> 1.0.0 Feature highlights
> ==============================
>
> Here is a summary list of key features included in PyPy 1.0:
>
> - The Just-In-Time compiler generator, now capable of generating the
>    first JIT compiler versions of our Python interpreter:
>
>    http://codespeak.net/pypy/dist/pypy/doc/jit.html
>
> - More Python interpreter optimizations (a CALL_METHOD bytecode, a method
>    cache, rope-based strings), now running benchmarks at around half of
>    CPython's speed (without the JIT):
>
>    http://codespeak.net/pypy/dist/pypy/doc/interpreter-optimizations.html
>
> - The Python interpreter can be translated to .NET and enables
>    interactions with the CLR libraries:
>
>    http://codespeak.net/pypy/dist/pypy/doc/cli-backend.html
>    http://codespeak.net/pypy/dist/pypy/doc/clr-module.html
>
> - Aspect Oriented Programming facilities (based on mutating the Abstract
>    Syntax Tree):
>
>    http://codespeak.net/pypy/dist/pypy/doc/aspect_oriented_programming.html
>
> http://codespeak.net/pypy/extradoc/eu-report/D10.1_Aspect_Oriented_Pr...
>
> - The JavaScript backend has evolved to a point where it can be used to
>    write AJAX web applications with it. This is still an experimental
>    technique, though. For demo applications which also showcase various
>    generated Python and PROLOG interpreters, see:
>
>    http://play1.codespeak.net/
>
> - Proxying object spaces and features of our Python interpreter:
>
>    - Tainting: a 270-line proxy object space tracking and boxing
>      sensitive information within an application.
>
>    - Transparent proxies: allow the customization of both application and
>      builtin objects from application level code.  Now featuring an
>      initial support module (tputil.py) for working with transparent
>      proxies.
>
> For a detailed description and discussion of high level backends and
> Python interpreter features, please see our extensive "D12" report:
>
> http://codespeak.net/pypy/extradoc/eu-report/D12.1_H-L-Backends_and_F...
>
> Funding partners and organisations
> =====================================================
>
> PyPy development and activities happen as an open source project and
> with the support of a consortium partially funded by a 28 month
> European Union IST research grant for the period from December 2004 to
> March 2007. The full partners of that consortium are:
>
>      Heinrich-Heine University (Germany), Open End (Sweden)
>      merlinux GmbH (Germany), tismerysoft GmbH (Germany)
>      Logilab Paris (France), DFKI GmbH (Germany)
>      ChangeMaker (Sweden), Impara (Germany)


Nice to read that things are going on. I've still a PyPy 0.7 version
on my notebook. I guess I will upgrade :)

A somewhat unrelated question. With Py3K Python gets optional type
annotations. Are you already architecting an annotation handler that
can process these annotations? This feature is somewhat competitive to
all the complicated type inference and jitting you have been worked
out so I don't know how it fits well into the current PyPy
architecture?

Ciao,
Kay



From gdonald at gmail.com  Sat Mar 24 15:23:18 2007
From: gdonald at gmail.com (Greg Donald)
Date: Sat, 24 Mar 2007 14:23:18 -0500
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174763412.409665.19870@l75g2000hse.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
	<mailman.5555.1174759784.32031.python-list@python.org>
	<1174763412.409665.19870@l75g2000hse.googlegroups.com>
Message-ID: <15e66e4e0703241223t15719649uf494c2c2c404e568@mail.gmail.com>

On 24 Mar 2007 12:10:12 -0700, 7stud <bbxx789_05ss at yahoo.com> wrote:
> Can you explain how that works?  If you install python in /usr/local,
> doesn't that leave you with something like /usr/local/python?  So what
> does putting usr/local/bin ahead of your other paths do?

./configure --prefix=/usr/local

Then python would be /usr/local/bin/python.

For bash put this somewhere near the end of your .bashrc or /etc/bashrc:

export PATH="/usr/local/bin:$PATH"

Then when you attempt to run the python binary it will be found in the
place you installed it first, not where the system version was
installed.

http://en.wikipedia.org/wiki/Path_%28computing%29


-- 
Greg Donald
http://destiney.com/


From rehceb at no.spam.plz  Sat Mar 31 09:45:25 2007
From: rehceb at no.spam.plz (Rehceb Rotkiv)
Date: Sat, 31 Mar 2007 08:45:25 -0500
Subject: Sorting a multidimensional array by multiple keys
References: <pan.2007.03.31.12.43.14@no.spam.plz>
	<1175346825.986685.42430@b75g2000hsg.googlegroups.com>
	<pan.2007.03.31.13.42.19@no.spam.plz>
Message-ID: <pan.2007.03.31.13.45.32@no.spam.plz>

Wait, I made a mistake. The correct result would be

reaction is BUT by the
pattern , BUT it is
rapid , BUT it is
sea , BUT it is
sodium , BUT it is
this manner BUT the dissolved

because "by the" comes before and "the dissolved" after "it is". Sorry 
for the confusion.


From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 27 09:32:26 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 27 Mar 2007 15:32:26 +0200
Subject: Mastering Python
In-Reply-To: <q8oMh.15081$tD2.3516@newsread1.news.pas.earthlink.net>
References: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>
	<1174052358.486071.163280@e65g2000hsc.googlegroups.com>
	<46018fd8$0$18018$426a74cc@news.free.fr>
	<q8oMh.15081$tD2.3516@newsread1.news.pas.earthlink.net>
Message-ID: <46091cdf$0$19664$426a74cc@news.free.fr>

Dennis Lee Bieber a ?crit :
> On Wed, 21 Mar 2007 21:40:51 +0100, Bruno Desthuilliers
> <bdesth.quelquechose at free.quelquepart.fr> declaimed the following in
> comp.lang.python:
> 
>> It will actually do something: rebind name 'a' to the method lower() of 
>> the string previously binded to 'a'
>>
> 	For future reference, and I hope you don't mind the lesson,

I don't.

> the past
> tense of "bind" is "bound"

err... I knew that, of course.



From spe.stani.be at gmail.com  Wed Mar  7 15:55:44 2007
From: spe.stani.be at gmail.com (SPE - Stani's Python Editor)
Date: 7 Mar 2007 12:55:44 -0800
Subject: Debugging segmentation faults
In-Reply-To: <1173294934.182507.116790@h3g2000cwc.googlegroups.com>
References: <1173294934.182507.116790@h3g2000cwc.googlegroups.com>
Message-ID: <1173300944.602217.194030@j27g2000cwj.googlegroups.com>

If the error is reproducable and you can run wxPython, you could use
the excellent WinPdb debugger, which ships with SPE (python editor):
http://www.digitalpeers.com/pythondebugger/

... but if you can only run your script on a remote server this won't
help you.

Stani

--
SPE - http://pythonide.stani.be

On 7 Mrz., 20:15, "George Sakkis" <george.sak... at gmail.com> wrote:
> I have a pure python program (no C extensions) that occasionally core
> dumps in a non-reproducible way. The program is started by a (non-
> python) cgi script when a form is submitted. It involves running a
> bunch of other programs through subprocess in multiple threads and
> writing its output in several files. So the only suspicious parts I
> can think of is subprocess and/or multithreading. For the
> multithreading part I'm using a modified version of threadpool.py
> (http://www.chrisarndt.de/en/software/python/threadpool/), which is
> built on top of the threading and Queue stdlib modules. Whatever bugs
> may linger there, I'd hope that they would show up as normal Python
> exceptions instead of segfaults.
>
> All I have now is a few not particularly insightful core files (actual
> path names and args changed for privacy):
>
> /home/gsakkis/foo>gdb --core core.20140
> GNU gdb Red Hat Linux (5.2-2)
> Copyright 2002 Free Software Foundation, Inc.
> GDB is free software, covered by the GNU General Public License, and
> you are
> welcome to change it and/or distribute copies of it under certain
> conditions.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB.  Type "show warranty" for
> details.
> This GDB was configured as "i386-redhat-linux".
> Core was generated by `python2.5 /home/gsakkis/foo/foo.py --XXX --
> max=30 --bar=/tmp/83840`
> Program terminated with signal 11, Segmentation fault.
> #0  0x080b222d in ?? ()
> (gdb) backtrace
> #0  0x080b222d in ?? ()
> #1  0x080b28d1 in ?? ()
> #2  0x080fa8ab in ?? ()
> #3  0x0805c918 in ?? ()
> (...)
> #28 0x080b310f in ?? ()
> #29 0x080dbfdd in ?? ()
> #30 0x40021fef in ?? ()
>
> Any hints ?




From cedb816 at yahoo.com  Wed Mar 14 22:37:23 2007
From: cedb816 at yahoo.com (ce)
Date: 14 Mar 2007 19:37:23 -0700
Subject: distributing python software in jar like fashion
In-Reply-To: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
Message-ID: <1173926243.640611.107130@o5g2000hsb.googlegroups.com>

On Mar 15, 10:23 am, alf <ask at me> wrote:
> Hi,
>
> I have a small app which consist of a few .py files. Is there any way to
> distribute it in jar like fashion as a single file I can just run python
> on. I obviously look for platform independent solution.
>
> Thx in advance, A.

You can import from zip achieves as PEP 273, but to execute in the
same mechanism as the jar files, recently there is no way afaik.

ce (pain n d'ass)



From tommy.nordgren at comhem.se  Mon Mar 12 07:21:48 2007
From: tommy.nordgren at comhem.se (Tommy Nordgren)
Date: Mon, 12 Mar 2007 12:21:48 +0100
Subject: programmatically manipulation environment variables of the
	calling shell
In-Reply-To: <b400c69a0703120333m5565c233laaf1247ed8fb5601@mail.gmail.com>
References: <b400c69a0703120333m5565c233laaf1247ed8fb5601@mail.gmail.com>
Message-ID: <F217FCE7-18E0-495D-A2E9-87D28F15224C@comhem.se>


On 12 mar 2007, at 11.33, Maxim Veksler wrote:

> Hello list,
>
> I'm trying to write a python script that would allow me to manipulate
> shell variables of the calling shell. I'm trying to write some logic
> that would know to add LD_LIBRARY_PATH to the users environment.
>
> In bash this is done with "export", can I do this with python? (If at
> all possible because python is actually a sub process of bash).
>
> Thank you,
> Maxim.
	This is not possible to do directly.
	There is however a possibility to solve this problem under special
circumstances.
	1. Your python (/perl/shell/etc) script must write the wanted  
environment
variables to standard out, as key-value pairs with a suitable separator.
	2. The invoking shell must agree with your script as to what  
separator is used.
	3. In the calling shell do myshellvars=`your_python_script`;
	4. Now the calling shell can parse the variable myshellvars to set  
up the environment.
------
What is a woman that you forsake her, and the hearth fire and the  
home acre,
to go with the old grey Widow Maker.  --Kipling, harp song of the  
Dane women
Tommy Nordgren
tommy.nordgren at comhem.se





From ceball at gmail.com  Sun Mar 25 02:13:01 2007
From: ceball at gmail.com (Chris)
Date: 24 Mar 2007 23:13:01 -0700
Subject: Tkinter Toplevel geometry
Message-ID: <1174803181.656189.303200@l77g2000hsb.googlegroups.com>

Hi,

If a user resizes a Toplevel window, or I set a Toplevel's geometry
using the geometry() method*, is there any way to have the geometry
reset to that required for all the widgets?

I think I found what I'm looking for in tk itself:
"""
13.3. How can I clear the geometry settings for a toplevel?
If you want to have Tk resize your toplevel to what the toplevel
requires (ie: the user might have resized it, or a widget was
removed), use [wm geometry $toplevel].
"""
[from http://tcl.sourceforge.net/faqs/tk/]



* for instance, if I want to turn of Tkinter's automatic adjustment of
the window to fit all the widgets by doing something like
self.geometry(self.geometry()), is there any way to undo that?

Thanks,
Chris



From paul at boddie.org.uk  Tue Mar 13 07:39:36 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 13 Mar 2007 04:39:36 -0700
Subject: Python in a desktop environment
In-Reply-To: <12vc6rfq995undb@corp.supernews.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
	<12vas8rhv0ji28d@corp.supernews.com>
	<45f573c4$0$27462$426a34cc@news.free.fr>
	<55lbl1F25geaaU1@mid.uni-berlin.de>
	<45f58642$0$1408$426a74cc@news.free.fr>
	<1173747820.728559.102360@q40g2000cwq.googlegroups.com>
	<12vc6rfq995undb@corp.supernews.com>
Message-ID: <1173785975.983770.327520@c51g2000cwc.googlegroups.com>

On 13 Mar, 04:33, Grant Edwards <gra... at visi.com> wrote:
> On 2007-03-13, David Cramer <dcra... at gmail.com> wrote:
>
> > and we already have a lot written in C++.

[...]

> I think you're nuts to decide that you need C++ before you've
> tested a Python implementation, but it's your nickle. :)

I'm imagining that the luxury of throwing away a large amount of
existing code just isn't an option.

Paul



From bruno.desthuilliers at gmail.com  Thu Mar  1 09:45:41 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 1 Mar 2007 06:45:41 -0800
Subject: django learn
In-Reply-To: <es6kt4$i9b$1@ss408.t-com.hr>
References: <es6kt4$i9b$1@ss408.t-com.hr>
Message-ID: <1172760340.352554.83600@j27g2000cwj.googlegroups.com>

On 1 mar, 14:36, Gigs_ <g... at hi.t-com.hr> wrote:
> HI folks!
>
> I want to learn to make web pages with django.
> I dont know nothing about HTML.
>
> How much of HTML I need to know to be able to learn django well?
>

<OT>
Anyway :
1/ you'll obviously need to have a good knowledge of html (plus css
and possibly javascript too) to 'make web pages'.
2/ you'll also need to have a good knowledge of the HTTP protocol to
write web apps
3/ and since Django is using Python, you'll need to know Python
too !-)
</OT>




From MonkeeSage at gmail.com  Sun Mar 11 00:01:15 2007
From: MonkeeSage at gmail.com (MonkeeSage)
Date: 10 Mar 2007 21:01:15 -0800
Subject: Python in a desktop environment
In-Reply-To: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
Message-ID: <1173589275.515022.51580@64g2000cwx.googlegroups.com>

On Mar 10, 9:23 pm, "David Cramer" <dcra... at gmail.com> wrote:
> If you had an application that you were about to begin development on
> which you wanted to be cross platform (at least Mac and Windows),
> would you suggest using c++ and Python?

Depending on what exactly you're trying to do, a pure python solution
may be sufficient, though obviously a C/C++ backend would be portable
as well. In terms of GUI; GTK or QT would probably be your best bet
(my personal preference is for pygtk), though Wxidgets may be a viable
option if the others are not (I'm not sure how advanced GTK/QT support
is on OSX). Your question is kind of vague, so this response is vague
as well. More info is needed to answer in a more specific way.

Regards,
Jordan



From skip at pobox.com  Wed Mar 28 13:41:35 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 28 Mar 2007 12:41:35 -0500
Subject: very strange syntax errors
In-Reply-To: <9rxOh.107891$ia7.93435@newsfe14.lga>
References: <l4xOh.107071$ia7.61865@newsfe14.lga>
	<9rxOh.107891$ia7.93435@newsfe14.lga>
Message-ID: <17930.43215.84815.474889@montanaro.dyndns.org>

    >> I'v been facing some very strange errors lately:
    >> 
    >> one example:
    >> 
    >> def __init__(self):
    >> ....
    >>     import my_info
    >>     some_text = my_info.T_SOME_TEXT
    >>                                    ^ syntax error
    >> 
    >> I manage to get rid of that one by moving the import on top of my file.
    ...
    hg> PS:

    hg> and I also get some even weirder studd such as an error on line 374
    hg> when I add a print on line 65

I think you're going to have to post a bit more of your code and some actual
tracebacks if people are to understand what the problem is.  For example, we
can't tell what the relationship is in your code between lines 65 and 374
without actually seeing the code.  I could look at those lines in an
arbitrary bit of my own code, but i doubt it would help.  Maybe not all of
your code, but a few lines of code around the suspect points.

Skip



From amitsoni.1984 at gmail.com  Tue Mar 13 19:22:02 2007
From: amitsoni.1984 at gmail.com (amitsoni.1984 at gmail.com)
Date: 13 Mar 2007 16:22:02 -0700
Subject: Problem in importing fipy
Message-ID: <1173828122.608006.320670@p15g2000hsd.googlegroups.com>

Hi,

I am using fipy for solving an ODE on python.

I am getting an error in the line: "from fipy.meshes.grid1D import
Grid1D", which says:
ImportError: No module named fipy.meshes.grid1D
Importing only fipy also gives a similar error.

I have Python2.4.4, numpy, matplotlib and fipy installed on my
computer.

Can anyone help me with this?
Is there any other package in Python with which I can solve ODE/PDEs?

Thank you,
Amit



From ptmcg at austin.rr.com  Tue Mar 27 15:19:33 2007
From: ptmcg at austin.rr.com (Paul McGuire)
Date: 27 Mar 2007 12:19:33 -0700
Subject: pattern search
In-Reply-To: <mailman.5679.1175019068.32031.python-list@python.org>
References: <mailman.5671.1175008459.32031.python-list@python.org>
	<eubdj4$meh$1@atlantis.news.tpi.pl>
	<mailman.5679.1175019068.32031.python-list@python.org>
Message-ID: <1175023173.010583.69100@o5g2000hsb.googlegroups.com>

On Mar 27, 3:13 pm, Fabian Braennstroem <f.braennstr... at gmx.de> wrote:
> Hi to all,
>
> Wojciech Mu?a schrieb am 03/27/2007 03:34 PM:
>
> > Fabian Braennstroem wrote:
> >> Now, I would like to improve it by searching for different 'real'
> >> patterns just like using 'ls' in bash. E.g. the entry
> >> 'car*.pdf' should select all pdf files with a beginning 'car'.
> >> Does anyone have an idea, how to do it?
>
> > Use module glob.
>
> Thanks for your help! glob works pretty good, except that I just
> deleted all my lastet pdf files :-(
>
> Greetings!
> Fabian

Then I shudder to think what might have happened if you had used
re's! :)

-- Paul



From duncan.booth at invalid.invalid  Tue Mar 13 05:52:06 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 13 Mar 2007 09:52:06 GMT
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<7x7itqqxlh.fsf@ruckus.brouhaha.com>
	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<mailman.4897.1173522747.32031.python-list@python.org>
	<pan.2007.03.10.13.38.30.791542@REMOVE.THIS.cybersource.com.au>
	<mailman.5009.1173771590.32031.python-list@python.org>
Message-ID: <Xns98F26344EE1F3duncanbooth@127.0.0.1>

Dick Moores <rdm at rcblue.com> wrote:

> But let's say there is one more constraint--that for each n of the N 
> positive integers, there must be an equal chance for n to be any of 
> the integers between 1 and M-N+1, inclusive. Thus for M == 50 and N 
>== 5, the generated list of 5 should be as likely to be [1,46,1,1,1] 
> as [10,10,10,10,10] or [14, 2, 7, 1, 26].

I don't think what you wrote actually works. Any combination including a 46 
must also have four 1s, so the digit 1 has to be at least 4 times as likely 
to appear as the digit 46, and probably a lot more likely than that.

On the other hand, making sure that each combination occurs equally often 
(as your example might imply) is doable but still leaves the question 
whether the order of the numbers matters: are [1,46,1,1,1] and [1,1,46,1,1]  
the same or different combinations?

The sorted/sample/xrange solution seems to give an even distribution or 
ordered combinations, I don't know what algorithm (short of enumerating all 
possible solutions and choosing one at random) gives an even distribution 
when the ordering doesn't matter.


From robert.kern at gmail.com  Tue Mar 27 13:23:55 2007
From: robert.kern at gmail.com (Robert Kern)
Date: Tue, 27 Mar 2007 12:23:55 -0500
Subject: Numeric Soup
In-Reply-To: <46094afe$1@nntp.zianet.com>
References: <46094afe$1@nntp.zianet.com>
Message-ID: <eubjvi$4b9$1@sea.gmane.org>

Erik Johnson wrote:
>     I am just starting to explore doing some scientific type data analysis
> using Python, and am a little confused by the different incarnations of
> modules (e.g., try Google("Python numeric").
> 
>     There is SciPy, NumPy, NumArray, Numeric...  I know some of these are
> related and some are separate, some are oudated, etc. but can someone sort
> of give a general run-down in layman's terms of what's what, what's used for
> what, what depends on what, and what's current?

http://www.scipy.org/History_of_SciPy

numpy is the current array package and supercedes Numeric and numarray. scipy
provides a bunch of computational routines (linear algebra, optimization,
statistics, signal processing, etc.) built on top of numpy.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco



From jgodoy at gmail.com  Sun Mar 18 09:00:43 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Sun, 18 Mar 2007 10:00:43 -0300
Subject: cheese shop: tagging and dating
References: <1174222345.818697.128020@e65g2000hsc.googlegroups.com>
Message-ID: <877ite1zb8.fsf@gmail.com>

"metaperl.etc at gmail.com" <metaperl.etc at gmail.com> writes:

> The first thing I look at when examining a module is how often it is
> updated. Unfortunately, the entries there dont show this. Eg:
>
>   http://www.python.org/pypi/PySimpleXML/1.0
>
> Second, it seems that tagging is more popular than the hierarchical
> browsing method currently offered by Cheese Shop. Are there efforts
> underway to support a tagging interface for the cheeseshop?

I believe hierarchies are easier when there's a lot of information.  You go
browsing by topic.

If there are only tags available, you'd have to look for hundreds of tags to
see if none of the possible names for the "thing" has been used ("database",
"db", "relational", "orm", "mapper", etc.). 

Ammending the current hierarchic structure with an alternate tag interface
would be interesting, though.  But not making it the main interface or the
only one.

Tags are cool when they are few.  They are a nightmare when there are hundreds
or thousands of them to search for something.

-- 
Jorge Godoy      <jgodoy at gmail.com>


From paul.rudin at ntlworld.com  Sat Mar 31 02:15:41 2007
From: paul.rudin at ntlworld.com (Paul Rudin)
Date: Sat, 31 Mar 2007 07:15:41 +0100
Subject: Game programming for kids: looking for open source 2D game
	development kit
References: <euid24$ugc$1@online.de> <euig08$fv3$2@news2.u-psud.fr>
	<460d4f36$0$10784$c3e8da3@news.astraweb.com>
Message-ID: <87slbmq6pe.fsf@rudin.co.uk>

John Salerno <johnjsal at NOSPAMgmail.com> writes:

> Laurent Pointal wrote:
>
>> With Python:
>> * pygame + build your drag'n drop features
>> * if you like 3D, vpython.
>>
>>
>> http://www.pygame.org/
>> http://www.vpython.org/
>
> Wow, vpython looks pretty  need. I'm messing around with it right now
> and reading the docs. But I can't find something...do you know how to
> clear the contents of the current scene? I checked the attributes of
> the display, but there is nothing like "empty" that would do it.

for x in scene.objects: 
    x.visible = 0

?



From kw at codebykevin.com  Sat Mar 17 13:09:52 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Sat, 17 Mar 2007 13:09:52 -0400
Subject: Python shell on mac os x
In-Reply-To: <1174084819.330438.4980@n76g2000hsh.googlegroups.com>
References: <1173995773.448029.269820@n59g2000hsh.googlegroups.com>
	<1hv1966.1poigs11f692njN%aleax@mac.com>
	<1174035180.781564.25130@n59g2000hsh.googlegroups.com>
	<1174084819.330438.4980@n76g2000hsh.googlegroups.com>
Message-ID: <45FC20E0.3080907@codebykevin.com>

7stud wrote:
> On Mar 16, 2:53 am, martin.lal... at gmail.com wrote:
>> or go tohttp://pythonmac.org/packages/
>>  and you have python 2.5 or python 2.4.4 with readline support
> 
> The download instructions seem to steer Mac users to version 2.4.4
> because it has more modules available. What is the consensus on that?
> 

If you just want binary packages installed, it might make sense to use 
2.4.4, but building new packages with 2.5 is easy: either use 
easy_install or sudo python setup.py. I've had no trouble building the 
stuff I need with 2.5.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From laurent.pointal at wanadoo.fr  Sat Mar 10 09:26:42 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Sat, 10 Mar 2007 15:26:42 +0100
Subject: UTF-8
References: <mailman.4899.1173535209.32031.python-list@python.org>
Message-ID: <45f2bf21$0$5094$ba4acef3@news.orange.fr>

Olivier Verdier wrote:
<zip>
> My question is the following: how to set a default encoding in
> python? I read an old thread about that and it didn't seem possible
> by then.

You *can* put a sys.setdefaultencoding("utf-8") in your sitecustomize.py
(see Python libs/site-packages/). Note that this function is no longer
available after Python startup.

But, IMHO, this is a *bad idea*, it may break modules which consider default
encoding to be ascii.
You should prefer to put 
        # -*- coding: utf-8 -*- 
at the begining of your sources files. With that you are ok with all Python
installations, whatever be the defautl encoding.
Hope this will become mandatory in a future Python version.

A+

Laurent.





From gagsl-py2 at yahoo.com.ar  Fri Mar 23 01:44:12 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 02:44:12 -0300
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1tkMh.115$mG4.94@newsfe12.lga>
	<pan.2007.03.22.07.07.29.369580@REMOVEME.cybersource.com.au>
	<VAyMh.35$ek6.24@newsfe12.lga>
Message-ID: <op.tpmnjyhpx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Thu, 22 Mar 2007 14:04:04 -0300, Bart Willems <b.r.willems at gmail.com>  
escribi?:

>> chown scriptuser script.py  # a unique user
>> chmod a-rwx script.py
>> chmod u+rx script.py
>
> If it works on the target machine - I am under the assumption that the
> client is some kind of government office - more likely to run Windows
> than it is to run unix/linux/etc.
>
> Who has a similar solution for windows?

cacls /help

-- 
Gabriel Genellina



From arkanes at gmail.com  Wed Mar  7 15:10:43 2007
From: arkanes at gmail.com (Chris Mellon)
Date: Wed, 7 Mar 2007 14:10:43 -0600
Subject: Why does SocketServer default allow_reuse_address = false?
In-Reply-To: <45ef0d8e$0$16290$88260bb3@free.teranews.com>
References: <45e3668e$0$16385$88260bb3@free.teranews.com>
	<1173278345.027948.94700@j27g2000cwj.googlegroups.com>
	<45ef0d8e$0$16290$88260bb3@free.teranews.com>
Message-ID: <4866bea60703071210s5a24edd0s40df16c2d314076@mail.gmail.com>

On 3/7/07, Joshua J. Kugler <joshua at eeinternet.com> wrote:
> Greg Copeland wrote:
> >> Is there some history to this of which I'm not aware?  Is there a good
> >> reason for it to default to false?
> <SNIP Greg's very informative reply>
> > Long story short, it is not a bug.  It is a feature.  The proper
> > default is that of the OS, which is to ensure SO_REUSEADDR is disabled
> > unless you absoluetely understand what you're buying by enabling it.
>
> Thanks for your reply.  Those are all point of which I had not been aware.
>
> My problem (and the reason I set reuse to True) is this: if I have
> connections active when I restart my service, upon restart, the socket will
> fail to bind because there is still a connection in a WAIT state.  And
> until that old connection goes away (30 seconds or so?) I cannot restart
> the service.  So, the only option would be to sit there in a loop calling
> serve_forever until it doesn't throw a "can't bind to socket" exception.
>
> Or is there something I'm *really* missing about the way SocketServer is
> supposed to work?  Am I supposed to notify my connection threads to shut
> down and disconnect "properly?"  Which gets even more fun since they are
> sitting there waiting for input on the connection and not in a position to
> respond to other events...gets back to the fun of "killing" threads that
> are blocking.
>
> j
>

This is just the way sockets work on your platform. How exactly
sockets shut down, and the exact effect that SO_REUSEADDR varies from
platform to platform. In your case, using it is probably reasonable.


From s99999999s2003 at yahoo.com  Tue Mar 20 01:33:13 2007
From: s99999999s2003 at yahoo.com (s99999999s2003 at yahoo.com)
Date: 19 Mar 2007 22:33:13 -0700
Subject: using regexp
Message-ID: <1174368793.835787.57710@e1g2000hsg.googlegroups.com>

hi
how can i use regexp to group these digits into groups of 3?

eg
line 123456789123456789

i have :

pat = re.compile("line\s+(\d{3})" , re.M|re.DOTALL)

but this only gives the first 3. I also tried

"line\s+(\d{3})+"
but also not working.
I need output to be ['123' ,'456','789', '123','456','789', .....]
thanks.



From rehceb at no.spam.plz  Sat Mar 31 08:43:08 2007
From: rehceb at no.spam.plz (Rehceb Rotkiv)
Date: Sat, 31 Mar 2007 07:43:08 -0500
Subject: Sorting a multidimensional array by multiple keys
Message-ID: <pan.2007.03.31.12.43.14@no.spam.plz>

Hello everyone,

can I sort a multidimensional array in Python by multiple sort keys? A 
litte code sample would be nice!

Thx,
Rehceb



From nagle at animats.com  Sat Mar 24 02:26:37 2007
From: nagle at animats.com (John Nagle)
Date: Fri, 23 Mar 2007 23:26:37 -0700
Subject: Python object overhead?
In-Reply-To: <mailman.5530.1174684299.32031.python-list@python.org>
References: <mailman.5530.1174684299.32031.python-list@python.org>
Message-ID: <8w3Nh.6$H_5.0@newssvr23.news.prodigy.net>

Matt Garman wrote:
> I'm trying to use Python to work with large pipe ('|') delimited data
> files.  The files range in size from 25 MB to 200 MB.
> 
> Since each line corresponds to a record, what I'm trying to do is
> create an object from each record.  However, it seems that doing this
> causes the memory overhead to go up two or three times.

    Why do you want all the records in memory at once?  Are you
doing some lookup on them, or what?  If you're processing files
sequentially, don't keep them all in memory.

    You're getting into the size range where it may be time to
use a database.

				John Nagle


From maxsteel at gmail.com  Fri Mar 30 15:56:54 2007
From: maxsteel at gmail.com (Max Steel)
Date: Fri, 30 Mar 2007 14:56:54 -0500
Subject: New to Python - Easy way to open a text file
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
	<1175270675.296617.83380@e65g2000hsc.googlegroups.com>
	<pan.2007.03.30.16.39.12.89800@gmx.net>
	<1175282893.015117.154310@l77g2000hsb.googlegroups.com>
Message-ID: <iYCdnXKeYrYe9pDbnZ2dnUVZ_rWnnZ2d@giganews.com>

nothing is "lame" to me , all help is appreciated :)

.\\ax


<kyosohma at gmail.com> wrote in message 
news:1175282893.015117.154310 at l77g2000hsb.googlegroups.com...
> On Mar 30, 11:39 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
>> In <1175270675.296617.83... at e65g2000hsc.googlegroups.com>, kyosohma 
>> wrote:
>> > I'm not familiar with ezt formats, however reading a text file is a
>> > breeze.
>>
>> This sentence doesn't match the code that follow.  It's really simpler
>> than that ``while`` loop.
>>
>> > f = open(r'pathToFile')
>> > while True:
>> >    line = f.readline()
>> >    if not line: break
>> >    # do something with the line of text such as print it.
>>
>> > f.close()
>>
>> f = open(r'pathToFile)
>> for line in f:
>>     # do something with the line of text such as print it.
>> f.close()
>>
>> Ciao,
>>         Marc 'BlackJack' Rintsch
>
> Yes, the "while" is lame, I admit it. But sometimes you just gotta go
> old school!
>
> Mike
> 




From steve at REMOVEME.cybersource.com.au  Thu Mar  8 19:11:54 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Fri, 09 Mar 2007 11:11:54 +1100
Subject: catching exceptions from an except: block
References: <1173292373.770519.158490@8g2000cwh.googlegroups.com>
	<1173345456.968709.128870@j27g2000cwj.googlegroups.com>
	<mailman.4795.1173346304.32031.python-list@python.org>
Message-ID: <pan.2007.03.09.00.11.51.151192@REMOVEME.cybersource.com.au>

On Thu, 08 Mar 2007 06:31:20 -0300, Gabriel Genellina wrote:

> En Thu, 08 Mar 2007 06:17:37 -0300, Gerard Flanagan  
> <grflanagan at yahoo.co.uk> escribi?:
> 
>> @onfail(False)
>> def a(x):
>>     if x == 1:
>>         return 'function a succeeded'
>>     else:
>>         raise
> 
> I know it's irrelevant, as you use a bare except, but such raise looks a  
> bit ugly...


I thought "raise" on its own was supposed to re-raise the previous
exception, but I've just tried it in the interactive interpreter and it
doesn't work for me.

>>> raise ValueError # prime a "previous exception"
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError
>>> raise # re-raise the previous exception?
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: exceptions must be classes, instances, or strings (deprecated), not NoneType


Have I misunderstood?



-- 
Steven D'Aprano 



From bkamrani at gmail.com  Thu Mar  1 13:46:53 2007
From: bkamrani at gmail.com (bkamrani at gmail.com)
Date: 1 Mar 2007 10:46:53 -0800
Subject: xml minidom redundant children??
Message-ID: <1172774813.293437.108250@v33g2000cwv.googlegroups.com>

Great guys:

As a newbie, I'm trying to simply parse a xml file using minidom, but
I don't know why I get some extra children(?). I don't know what is
wrong in xml file, but I've tried different xml files, still same
problem.

******************************************************************************
           xml file (fileTest) looks like:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<afc xmlns="http://python.org/:aaa" xmlns:afc="http://
python.org/:foo">
<afc:Bibliography>
   <File version="2.0.0.0" publicationDate="2007-02-16
11:23:06+01:00" />
   <Revision version="2" />
   <Application version="02.00.00" />
</afc:Bibliography>
</afc>
******************************************************************************
            Python file looks like:
from xml.dom import minidom
doc = minidom.parse(fileTest)
a= doc.documentElement.childNodes
print a
print '--------------'
for item in a:
    print item.nodeName
******************************************************************************
             And output is:
[<DOM Text node "\n">, <DOM Element: afc:Bibliography at 12082960>,
<DOM Text node "\n">]
--------------
#text
afc:Bibliography
#text
******************************************************************************

My question is why this <DOM Text node "\n"> or  #text has been
created and how to get rid of them by changing python code? (here I'm
not interested to change xml file.)

Have search the forum without finding any solution :-(

Thank you to all in advance!!
/Ben



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Sun Mar 11 08:20:07 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Sun, 11 Mar 2007 13:20:07 +0100
Subject: threading and iterator crashing interpreter
References: <1173609124.089611.242080@h3g2000cwc.googlegroups.com>
Message-ID: <55iafnF24d6qgU3@mid.individual.net>

Janto Dreijer wrote:

> I have been having problems with the Python 2.4 and 2.5
> interpreters on both Linux and Windows crashing on me.

I don't understand -- does the interpreter crash (segfault) or is
just your program terminating due to unhandled exceptions?

Regards,


Bj?rn

-- 
BOFH excuse #32:

techtonic stress



From steven.bethard at gmail.com  Thu Mar 15 22:19:16 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Thu, 15 Mar 2007 20:19:16 -0600
Subject: To count number of quadruplets with sum = 0
In-Reply-To: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
Message-ID: <EcadnVI0yt07Y2TYnZ2dnUVZWhednZ2d@comcast.com>

n00m wrote:
> http://www.spoj.pl/problems/SUMFOUR/
> 
> 3
> 0 0 0 0
> 0 0 0 0
> -1 -1 1 1
> Answer for this input data is 33.
> 
> My solution for the problem is
> ======================================================================
> 
> import time
> t = time.clock()
> 
> q,w,e,r,sch,h = [],[],[],[],0,{}
> 
> f = open("D:/m4000.txt","rt")
> 
> n = int(f.readline())
> 
> for o in range(n):
>   row = map(long, f.readline().split())
>   q.append(row[0])
>   w.append(row[1])
>   e.append(row[2])
>   r.append(row[3])
> 
> f.close()
> 
> for x in q:
>   for y in w:
>     if h.has_key(x+y):
>       h[x+y] += 1
>     else:
>       h[x+y] = 1

This won't help much, but you can rewrite the above as::

     x_y = x + y
     h[x_y] = h.get(x_y, 1)

Or if you're using Python 2.5, try::

     h = collections.defaultdict(itertools.repeat(0).next)

     ...
     for x in q:
         for y in w:
             h[x + y] += 1
     ...

Not likely to get you an order of magnitude though.

> for x in e:
>   for y in r:
>     sch += h.get(-(x+y),0)

If you use the collections.defaultdict approach above, this becomes::

     for x in e:
         for y in r:
             sch += h[-(x + y)]

Note that you should also probably put all your code into a function -- 
looking up function locals is quicker than looking up module globals.

STeVe


From jon+usenet at unequivocal.co.uk  Wed Mar  7 05:45:23 2007
From: jon+usenet at unequivocal.co.uk (Jon Ribbens)
Date: 7 Mar 2007 10:45:23 GMT
Subject: Recommended FastCGI module?
References: <W6tHh.1644$uo3.758@newssvr14.news.prodigy.net>
Message-ID: <slrneut5u3.kpr.jon+usenet@snowy.squish.net>

In article <W6tHh.1644$uo3.758 at newssvr14.news.prodigy.net>, John Nagle wrote:
> 	The "JonPy" version:
> 	http://jonpy.sourceforge.net/fcgi.html
> 	Last revised in 2004.

I'd recommend my one, but it's just possible I'm not impartial ;-)


From jjl at pobox.com  Wed Mar 14 20:54:28 2007
From: jjl at pobox.com (John J. Lee)
Date: Thu, 15 Mar 2007 00:54:28 GMT
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<fXMHh.717$R61.393@bignews1.bellsouth.net>
	<56NHh.1217$FG1.248@newssvr27.news.prodigy.net>
	<igNHh.724$R61.704@bignews1.bellsouth.net>
	<7xhcsws35x.fsf@ruckus.brouhaha.com>
	<%PNHh.1221$FG1.642@newssvr27.news.prodigy.net>
	<87zm6kzodq.fsf@pobox.com>
	<DXHIh.14309$bb1.1765@newssvr17.news.prodigy.net>
	<878xe4zhud.fsf@pobox.com>
	<1173581125.663707.5810@s48g2000cws.googlegroups.com>
	<87odmvinhf.fsf@pobox.com>
	<Hh0Kh.3232$Qw.920@newssvr29.news.prodigy.net>
Message-ID: <871wjrs4vo.fsf@pobox.com>

John Nagle <nagle at animats.com> writes:

> John J. Lee wrote:
> > "Graham Dumpleton" <Graham.Dumpleton at gmail.com> writes:
> >
> >>On Mar 11, 12:31 pm, j... at pobox.com (John J. Lee) wrote:
> 
> > Is it possible to ask mod_python to start separate processes to serve
> > requests, rather than "separate" interpreters?  We couldn't see a way.
> 
>     That's what CGI does.

I meant long running processes, as I hoped was obvious from context...


John


From superflit at gmail.com  Wed Mar 21 12:56:12 2007
From: superflit at gmail.com (flit)
Date: 21 Mar 2007 09:56:12 -0700
Subject: Technical Answer - Protecting code in python
In-Reply-To: <pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
Message-ID: <1174496172.528613.236730@p15g2000hsd.googlegroups.com>

First I wanna thanks the all people who gives good contribution to
this thread, thank you all..
Now I have something more to say:

OK, that kind of answer is what I was trying to avoid..

On Mar 21, 1:23 pm, Steven D'Aprano
<s... at REMOVE.THIS.cybersource.com.au> wrote:
> On Wed, 21 Mar 2007 06:36:16 -0700, flit wrote:
> > 1 - There is a way to make some program in python and protects it? I
> > am not talking about ultra hard-core protection, just a simple one
> > that will stop 90% script kiddies.
>
> Protect it from what? Viruses? Terrorists? The corrupt government? Your
> ex-wife cutting it up with scissors? People who want to copy it? People
> who will look at your code and laugh at you for being a bad programmer?
>
> Until you tell us what you are trying to protect against, your question
> is meaningless.

In this time I supposed someone took too much coffee..But will
ignore..


>
> Is your program valuable? Is it worth money? Then the 90% of script
> kiddies will just wait three days, and download the program off the
> Internet after the real hackers have broken your protection.
>
> If it is NOT valuable, then why on earth do you think people will put up
> with whatever "protection" you use? Why won't they just use another
> program?

It?s doesn?t matter if it is the next BIG HIT Ultra-fast-next-google
thing or a programm to take control of my "pet-people-living-in-
welfare-trying-to-be-political"
It?s a technical question, If you can?t answer it ok, I will not
suppose that you are it or that, it?s not a personal question or
matter.


> > 2 - If I put the code in web like a web service, how can I protect my
> > code from being ripped? There is a way to avoid someone using my site
> > and ripping the .py files?
>
> Don't make the .py files available on the web server.
>

Now we have a real contribution to the thread. Thank You

> [penny drops]
>
> Hang on, you want us to believe that you're a serious computer programmer
> with a seriously valuable program that's worth "protecting", and you don't
> know that? I smell a troll.
>
> --
> Steven.

Again, you don?t have to believe, suppose or think anything about me,
are you capable to make any contribution? Technical one? Are you
sooooooo good and "serious" programmer that you did not develop your
personal skills, and thinks that winning an argument in internet is
the best thing in the world?

Thanks all,
Flit
(the-not-serious-programmer-that-wanna-to-be-a-big-capitalist-and-take-
the-money-from all)



From mccredie at gmail.com  Mon Mar  5 16:34:50 2007
From: mccredie at gmail.com (Matimus)
Date: 5 Mar 2007 13:34:50 -0800
Subject: Is every number in a list in a range?
In-Reply-To: <mailman.4693.1173129006.32031.python-list@python.org>
References: <mailman.4693.1173129006.32031.python-list@python.org>
Message-ID: <1173130489.377736.312100@30g2000cwc.googlegroups.com>

On Mar 5, 11:03 am, "Steven W. Orr" <ste... at syslang.net> wrote:
> I have a list ll of intergers. I want to see if each number in ll is
> within the range of 0..maxnum
>
> I can write it but I was wondering if there's a better way to do it?
>
> TIA
>
> --
> Time flies like the wind. Fruit flies like a banana. Stranger things have  .0.
> happened but none stranger than this. Does your driver's license say Organ ..0
> Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
> individuals! What if this weren't a hypothetical question?
> steveo at syslang.net

I would probably do something using max and min functions like this:

seq = [...] # your list

if min(seq) >= 0 && max(seq) <= MAXNUM:
 do stuff



From jstroud at mbi.ucla.edu  Sat Mar  3 19:03:04 2007
From: jstroud at mbi.ucla.edu (James Stroud)
Date: Sat, 03 Mar 2007 16:03:04 -0800
Subject: pop method question
In-Reply-To: <pan.2007.03.03.23.46.12.431525@REMOVE.THIS.cybersource.com.au>
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<7xd53qxdb2.fsf@ruckus.brouhaha.com>
	<mailman.4634.1172955347.32031.python-list@python.org>
	<pan.2007.03.03.22.55.13.774135@REMOVE.THIS.cybersource.com.au>
	<CqnGh.6368$re4.4381@newssvr12.news.prodigy.net>
	<pan.2007.03.03.23.46.12.431525@REMOVE.THIS.cybersource.com.au>
Message-ID: <4%nGh.5297$P47.1193@newssvr22.news.prodigy.net>

Steven D'Aprano wrote:
> On Sat, 03 Mar 2007 23:22:10 +0000, James Stroud wrote:
> 
>>> To my mind, having to supply a key to dict.pop makes it rather pointless.
>>>
>>>
>>
>> I've used it in something like this and found it worthwhile:
>>
>> for akey in dict1:
>>    if some_condition(akey):
>>      dict2[akey] = dict2.pop(akey)
> 
> Surely that's a no-op? You pop the value, than add it back again.
> 
> Or do you mean dict2[akey] = dict1.pop(akey)?
> 
> If so, are you sure that works? When I try it, I get "RuntimeError:
> dictionary changed size during iteration". You would need to take a copy
> of the keys and iterate over that.
> 
> for key in dict1.keys():
>     if some_condition(key):
>         dict2[key] = dict1.pop(key)
> 
> 
> 

Yes. You are right, both in the typo and using keys().

James


From newsuser at stacom-software.de  Fri Mar 16 10:28:42 2007
From: newsuser at stacom-software.de (Alexander Eisenhuth)
Date: Fri, 16 Mar 2007 15:28:42 +0100
Subject: String formatting with fixed width
In-Reply-To: <ete5ec$juo$2@online.de>
References: <ete5ec$juo$2@online.de>
Message-ID: <ete9e7$phh$1@online.de>

Thanks for your fast reply. I'm fine with your "%7.03f" solution. (negatives are 
  not significant)

Alexander Eisenhuth schrieb:
> Hello alltogether,
> 
> is it possible to format stings with fixed width of let's say 7 
> character. T need a floating point with 3 chars before dot, padded with 
> ' ' and 3 chars after dot, padded with '0'.
> 
> Followingh is my approach
>  >>> f = 21.1
>  >>> s = "%.03f" % f
>  >>> s
> '21.100'
> 
> But there are missing ' '. How can I get that? (For bigger numbers than 
> 999 they might be cut: 1021 -> 021)
> 
> Thanks,
> Alexander


From felipe.lessa at gmail.com  Sat Mar 24 23:37:43 2007
From: felipe.lessa at gmail.com (Felipe Almeida Lessa)
Date: Sun, 25 Mar 2007 00:37:43 -0300
Subject: functions, classes, bound, unbound?
In-Reply-To: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
References: <1174793076.053192.16780@o5g2000hsb.googlegroups.com>
Message-ID: <c2701f5c0703242037i4079bd0doff20d26b9ea542f@mail.gmail.com>

On 24 Mar 2007 20:24:36 -0700, 7stud <bbxx789_05ss at yahoo.com> wrote:
> Here is some example code that produces an error:
[snip]

Why do people absolutely *love* to do weird and ugly things with
Python? Contests apart, I don't see lots of people trying this kind of
things on other (common) languages.

Say with me: "Python is powerful, but I'll use that power *only* for
beautiful and straightforward code."

Further reading:
http://www.python.org/doc/Humor.html#zen

-- 
Felipe.


From duncan.booth at invalid.invalid  Mon Mar 12 07:14:13 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 12 Mar 2007 11:14:13 GMT
Subject: number generator
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<et1hjq$okj$1@tdi.cu.mi.it> <1hut8e8.g1jy3a1hj5hobN%aleax@mac.com>
Message-ID: <Xns98F170F2F2FEBduncanbooth@127.0.0.1>

aleax at mac.com (Alex Martelli) wrote:

> Without any specification regarding the distributions required for the
> "5 random numbers" it's really impossible to say whether these are
> better or worse than other proposed solutions.

FWIW, I decided it would be fun to see what kind of implementation I 
could come up test driven and avoiding reading the thread or background 
references too much first. So starting from:

import unittest

def partition(total, n, min):
    return [50]

class PartitionTests(unittest.TestCase):
    def testsinglevalue(self):
        self.assertEqual([50], partition(50, 1, 1))

if __name__=='__main__':
    unittest.main()

I eventually worked my way through 15 revisions to the code below.

The tests were added in the order you see them below. The commented out 
function is the one I had arrived at before I added the first 
distribution test which triggered a major refactor (although the code 
ended up remarkably similar): if you uncomment it all but the 
distribution tests pass.

I don't really like the arbitrary limits for the distribution tests, but 
I'm not sure how else to test that sort of thing. And as Alex said, 
without knowing what distribution the OP wanted the definition I chose 
to use is completely arbitrary.

----- partition.py -------
import unittest, collections
from random import randint, sample

def partition(total, n, min):
    maxtotal = total - n*(min-1)
    posts = sorted(sample(xrange(1, maxtotal), n-1))
    return [ (b-a)+min-1 for (a,b) in zip([0]+posts, posts+[maxtotal]) ]

# def partition(total, n, min):
#     maxtotal = total - (n*min)
#     sums = sorted(randint(0, maxtotal) for i in range(n-1))
#     return [(b-a)+min for (a,b) in zip([0]+sums, sums+[maxtotal])]

class PartitionTests(unittest.TestCase):
    def testsinglevalue(self):
        self.assertEqual([50], partition(50, 1, 1))

    def testnvalues(self):
        self.assertEqual([1]*5, partition(5, 5, 1))

    def testnminusone(self):
        self.assertEqual([1]*4+[2], sorted(partition(6, 5, 1)))

    def testnminusone2(self):
        # Check we get all possible results eventually
        expected = set([(1,1,2), (1,2,1), (2,1,1)])
        for i in range(100):
            got = tuple(partition(4,3,1))
            if got in expected:
                expected.remove(got)
            if not len(expected):
                break
        self.assertEqual(len(expected), 0)

    def testdistribution(self):
        # Make sure we get each of 3 possible outcomes roughly
        # equally often.
        actual = collections.defaultdict(int)
        for i in range(1000):
            actual[tuple(partition(4,3,1))] += 1
        counts = actual.values()
        assert (min(counts) > 250)
        assert (max(counts) < 400)

    def testdistribution2(self):
        # More arbitrary limits for the distribution. 10 possible
        # outcomes this time.
        actual = collections.defaultdict(int)
        ntries = 10000
        for i in range(ntries):
            actual[tuple(partition(6,3,1))] += 1
        counts = actual.values()
        assert (min(counts) > 900)
        assert (max(counts) < 1100)

    def testmintwo(self):
        self.assertEqual([2]*50, partition(100,50,2))

    def testminzero(self):
        self.assertEqual([0]*20, partition(0,20,0))

    def testcantdoit(self):
        self.assertRaises(ValueError, partition, 100, 51, 2)

if __name__=='__main__':
    unittest.main()

--------------------------


From python at rcn.com  Thu Mar 15 02:46:29 2007
From: python at rcn.com (Raymond Hettinger)
Date: 14 Mar 2007 23:46:29 -0700
Subject: performance question
In-Reply-To: <mP4Kh.6945$yW.6277@newssvr11.news.prodigy.net>
References: <mP4Kh.6945$yW.6277@newssvr11.news.prodigy.net>
Message-ID: <1173941189.001985.214100@l75g2000hse.googlegroups.com>

[Eric Texier]
> I need speed here. What will be the fastest method or does it matter?
Follow Alex's advice and use the timeit module, but do not generalize
from too small examples; otherwise, the relative timings will be
thrown-off by issues like the time to lookup "write" and "a" and "str"
(all of which will be faster if made a local).  Likewise, do the
timings with the actual expected vector length.


> (for the example 'a' is only 3 values for the clarity of the example)
> a = [1,3,4.] ##
> f.write("vec %f %f %f \n" % (a[0],a[1],a[2]))

It's a waste of time to lookup and repack with (a[0],a[1],a[2]).
Instead, try:
    f.write('vec %f %f %f' % tuple(a))


> f.write("vec " + str(a[0]) + " " + str(a[1]) + " " + str(a[2]) + "\n")

Often, it is better to join than to make successive concatenations:

   f.write('vec' + ' '.join(map(str, a)))


> also it there a relevant speed difference between making few small write
> instead of 1 bigger one.

Yes.  One big one is faster than many small.


Raymond



From google at mrabarnett.plus.com  Fri Mar  2 22:49:50 2007
From: google at mrabarnett.plus.com (MRAB)
Date: 2 Mar 2007 19:49:50 -0800
Subject: Questions about app design - OOP with python classes
In-Reply-To: <pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>
References: <1172755442.612209.27140@k78g2000cwa.googlegroups.com>
	<45e733aa$0$25247$426a74cc@news.free.fr>
	<pan.2007.03.02.04.14.10.655399@REMOVEME.cybersource.com.au>
	<7xabywnugu.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.04.47.37.365032@REMOVEME.cybersource.com.au>
Message-ID: <1172893790.132663.276490@s48g2000cws.googlegroups.com>

On Mar 2, 4:47 am, Steven D'Aprano <s... at REMOVEME.cybersource.com.au>
wrote:
> On Thu, 01 Mar 2007 20:24:33 -0800, Paul Rubin wrote:
> > Steven D'Aprano <s... at REMOVEME.cybersource.com.au> writes:
> >> But if you used Apps Hungarian, and saw this line of code:
>
> >> if hmmCurrentHeight <= hinCriticalHeight:
>
> >> then you should instantly recognise that there's a problem. Comparing
> >> a height in millimetres to a height in inches is not a good thing to do,
> >> no matter that they're both floats.
>
> > That still sounds like an unreliable manual type system,
>
> It's unreliable in the sense that the coder has to follow the naming
> convention, and must have some bare minimum of sense. If your coders are
> morons, no naming convention will save you. (For that matter, nothing will
> save you.)
>
> > instead of an
> > automatic type system that includes dimension analysis.  You might
> > like this:
>
> >    http://futureboy.homeip.net/frinkdocs/
>
> > There are many Python implementations of dimensioned units as well.  I
> > posted one here a few weeks ago.
>
> Sure, and I love the Unix utility "units", and my HP calculator.
> Dimensioned units are useful.
>
> But dimensioned units are still only part of the story. Joel describes the
> situation the early Word developers found: when you're writing a word
> processor, you are doing a LOT of conversions between screen coordinates
> and window pane coordinates. Both have the same type (a pair of ints),
> both have the same dimensional units (length/pixels) but they are
> semantically different. If you place the character "N" at coordinates 0,0,
> it makes a big difference if the coordinates are relative to the current
> window or relative to the screen.
>
> Apps Hungarian is a heuristic for dealing with semantic differences, not
> data types. It deals with more than just dimensional analysis.
>
Basically what you want are dimensions such as "screen coordinate" and
"window coordinate" as well as "pixel", and also other kinds of
dimensions which combine differently. For example:

The dimension "pixel" works one way and the dimensions "relative to
screen" and "relative to window" work a differnt way.

If:

    p is a point relative to the screen:     integer, <pixel>,
+<relative to screen>

    q is a point relative to the window:     integer, <pixel>,
+<relative to window>

    r is the window relative to the screen:  integer, <pixel>,
+<relative to screen>, -<relative to window>

then:

    p = q + r

    <pixels> = <pixels> + <pixels>

    <relative to screen> = <relative to window> + (<relative to
screen> - <relative to window>)



From http  Sun Mar 18 04:23:06 2007
From: http (Paul Rubin)
Date: 18 Mar 2007 00:23:06 -0800
Subject: Finding the insertion point in a list
References: <1174067947.276987.232810@d57g2000hsg.googlegroups.com>
	<7xird0bom3.fsf@ruckus.brouhaha.com>
	<pan.2007.03.17.06.01.12.113236@REMOVE.THIS.cybersource.com.au>
	<7xfy845q24.fsf@ruckus.brouhaha.com>
	<mailman.5220.1174128479.32031.python-list@python.org>
Message-ID: <7xbqir9d05.fsf@ruckus.brouhaha.com>

Steve Holden <steve at holdenweb.com> writes:
> >    max(i for i,t in enumerate(x) if t <= y)
> > Those are actually pretty direct.
> 
> How about a solution (like the bisect one suggested almost as soon as
> this thread started) that doesn't iterate over the whole list.

Here's a Haskell-inspired one:

    len(list(itertools.takewhile(lambda t: y > t, x)))

It stops iterating when it hits an element >= y.  I originally wanted
to write the above as:
    
    len(itertools.takewhile(y.__gt__, x))

but it looks like regular numbers only support __cmp__ and not rich
comparison, and also you can't take the length of an iterator.  In
Haskell this type of thing is very natural:

   length(takeWhile (y >) x)


From h.b.furuseth at usit.uio.no  Fri Mar  9 04:32:00 2007
From: h.b.furuseth at usit.uio.no (Hallvard B Furuseth)
Date: Fri, 09 Mar 2007 10:32:00 +0100
Subject: class attrdict
References: <hbf.20070302nsi@bombur.uio.no>
	<1hud4hf.r52pr7wyx0adN%aleax@mac.com>
	<1173009806.383478.50230@i80g2000cwc.googlegroups.com>
	<1hufw45.os60h3bkuqh9N%aleax@mac.com>
Message-ID: <hbf.20070309ervv@bombur.uio.no>

Alex Martelli writes:
> (...)
>> class Namespace(object):
> (...)
> I might, if it weren't for the redundant "if" and the horribly buggy
> interference between separate instances -- which is why I wrote it,
> almost six years ago and without the bugs, as
> <http://aspn.activestate.com/ASPN/Python/Cookbook/Recipe/52308> .

Nice one.  I gotta dig up the Cookbook again.

-- 
Hallvard


From nagle at animats.com  Tue Mar  6 11:34:04 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 06 Mar 2007 16:34:04 GMT
Subject: Device Drivers in python(kernel modules)
In-Reply-To: <mailman.4713.1173185473.32031.python-list@python.org>
References: <180b672e0703060409i7eca1b65se10923c79a8f5b23@mail.gmail.com>
	<mailman.4713.1173185473.32031.python-list@python.org>
Message-ID: <0KgHh.7433$re4.5435@newssvr12.news.prodigy.net>

Thomas Ploch wrote:
> rishi pathak schrieb:
> 
>>I am not much of a kernel programmer , I have a requirement to shift a
>>python code to work as a kernel module.
>>So I was just wondering whether we can write a kernel module in python.
>>A thought is that if we can somehow convert python code into a C object
>>code then it can be done.
>>Can some one suggest something..anything

    1.  For what operating system?

    2.  WHY?

    3.  This is probably a bad idea.  If it doesn't have to go in the
operating system kernel, it shouldn't go in the kernel.

				John Nagle


From albmont at centroin.com.br  Mon Mar 12 09:25:15 2007
From: albmont at centroin.com.br (Alberto Monteiro)
Date: Mon, 12 Mar 2007 11:25:15 -0200
Subject: New to Python
In-Reply-To: <1173704503.459048.310560@t69g2000cwt.googlegroups.com>
References: <mailman.4956.1173688843.32031.python-list@python.org>
	<55kmslF249ihcU1@mid.uni-berlin.de>
	<mailman.4960.1173698053.32031.python-list@python.org>
	<1173704503.459048.310560@t69g2000cwt.googlegroups.com>
Message-ID: <20070312131325.M21752@centroin.com.br>

Dustan wrote:
>
>> What is the best way to get documentation about the functions
>> and classes of python? I tried to google, but usually I can just
>> find the __doc__ of the objects, without examples or anything that
>> can help me use it.
> 
> Refer to this as a reference:
> http://docs.python.org/
> 
I guess I've been there :-)

> It includes a tutorial and documentation on the functions and classes
> in all the global modules, as well as builtin functions (http://
> docs.python.org/lib/built-in-funcs.html) and syntax. If you have 
> prior experience with programming, you may be able to learn python 
> from the tutorial, but otherwise, I would highly recommend you get a 
> good book for beginners on python 
> (http://wiki.python.org/moin/PythonBooks); there's plenty of them 
> out there.
> 
I do have previous experience with programming (much more than
it's reasonable for one lifetime, BTW. I have the curse of never
forgetting things I learn, so sometimes I catch myself thinking
in archaic and extinct languages), but I found python particularly
hard to learn (not as much as Haskell). Maybe I am not doing it 
the right way, trying to learn Python _and_ Python GUI interface 
at the same time.

For example, yesterday I wanted to open a window, draw some
image, and make it move. I tried it with tkinter and with pygame,
but I didn't succeed - there was no way I could find how to
begin the image in the center of the window (!!!).

Such basic things are usually solved with a google search, like
"python image position", but there was no inchantation I could utter
that would bring me the effect I wanted (oops. Bad example. I guess
"python image position" would give a useful answer...)

Another example, I found in pygame functions that would return
something called an "EventList". But whenever I searched for
"EventList" to see what is that, I got back to the page with
the functions that returned the EventList :-)

Also, basic things like how does "+" operate on object "xxx"
are impossible to google search.

Anyway, thanks for the help.

Alberto Monteiro




From rkmr.em at gmail.com  Sun Mar 11 23:30:41 2007
From: rkmr.em at gmail.com (rkmr.em at gmail.com)
Date: Sun, 11 Mar 2007 20:30:41 -0700
Subject: hotmail / aim / yahoo addressbook importer
Message-ID: <e04d2e90703112030q11cbdd1ete67b3b2084aea7d6@mail.gmail.com>

Hi
Are there any hotmail / aim / yahoo addressbook importer in python?
thanks
mark


From joshbloom at gmail.com  Wed Mar 14 14:06:14 2007
From: joshbloom at gmail.com (Josh Bloom)
Date: Wed, 14 Mar 2007 11:06:14 -0700
Subject: Python & Oracle
In-Reply-To: <et9d8r$vga$1@sea.gmane.org>
References: <et9d8r$vga$1@sea.gmane.org>
Message-ID: <d25b6e9a0703141106j70d58da1w1ed6e8ad5b565b8e@mail.gmail.com>

I would suggest using cx_Oracle as I have had good experience with it.
http://www.cxtools.net/default.aspx?nav=cxorlb

-Josh

On 3/14/07, Facundo Batista <facundo at taniquetil.com.ar> wrote:
>
> Hi! I need to connect to Oracle.
>
> I found this binding,
>
>   http://www.zope.org/Members/matt/dco2
>
> that is the recommended in the Python page.
>
> But that page seems a bit confuse to me. In the upper right corner says
> that the last release is PreRelease 1, from 2001-11-15.
>
> At the bottom, however, it says that 1.3 beta was released 2003-02-10,
> and is a development version (the last stable is 1.2, from 2002-10-02),
> four and a half years ago.
>
> The question is: is this connector the recommended one? it's aged
> because it's stable and no more changes are necessary, or it just dead?
> Works Ok?
>
> Thank you!! Regards,
>
> --
> .   Facundo
> .
> Blog: http://www.taniquetil.com.ar/plog/
> PyAr: http://www.python.org/ar/
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From evenprimes at gmail.com  Fri Mar 16 14:37:34 2007
From: evenprimes at gmail.com (Chris Cioffi)
Date: Fri, 16 Mar 2007 14:37:34 -0400
Subject: distributing python software in jar like fashion
In-Reply-To: <wbzKh.10576$jx3.1929@newssvr25.news.prodigy.net>
References: <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d@comcast.com>
	<etbv8p$pg9$1@engnntp2.cig.mot.com>
	<wbzKh.10576$jx3.1929@newssvr25.news.prodigy.net>
Message-ID: <f03f4fdf0703161137j5c52163u10b752a7cce72b6a@mail.gmail.com>

Hi John,

I don't think eggs are a flop, however the pain they are trying to
solve is generally pretty minor in the Python world vs what we often
see with other languages.  We're starting to see some push to move
more 3rd party libraries and frameworks to eggs (ie:  Turbogears) and
as the developers get used to dealing with eggs we will reach a
critical mass.

The 2 main things holding eggs back, imo:
1.  The eggs extensions aren't included in the Python std lib.
2.  The Python std lib is fairly robust and we can accomplish a
significant amount of work without needing 3rd party code.

If eggs were included in the std lib, and/or the std lib was packaged
as eggs we'd see a far more rapid uptake.  The key is getting the egg
extensions into the main distribution.

Chris

On 3/16/07, John Nagle <nagle at animats.com> wrote:
>      Were Python "eggs" a flop, or what?
>
>      We need to have one packager that everyone agrees on.
> Otherwise, installs become a mess, and then you have to have
> installers that handle multiple packagers.
>
>                                         John Nagle
>
> Gary Duzan wrote:
> > In article <Vs6dnZOY8sSDM2XYnZ2dnUVZ_rqhnZ2d at comcast.com>, alf  <ask at me> wrote:
> >
> >>Hi,
> >>
> >>I have a small app which consist of a few .py files. Is there any way to
> >>distribute it in jar like fashion as a single file I can just run python
> >>on. I obviously look for platform independent solution.
> >>
> >>Thx in advance, A.
> >
> >
> >    There is a new package that has been discussed here recently
> > called Squisher that should do what you want by packing things into
> > a single pyc file. There are still some minor issues that need to
> > be ironed out with running the pyc directly, but it should do
> > exactly what you want Real Soon Now.
> >
> > http://groups.google.com/groups/search?q=group%3Acomp.lang.python+squisher&qt_s=Search
> >
> >                                       Gary Duzan
> >                                       Motorola CHS
> >
> >
> --
> http://mail.python.org/mailman/listinfo/python-list
>


-- 
"A little government and a little luck are necessary in life, but only
a fool trusts either of them." -- P. J. O'Rourke


From gagsl-py2 at yahoo.com.ar  Sun Mar 18 05:31:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sun, 18 Mar 2007 06:31:24 -0300
Subject: lock problem
References: <mailman.5153.1173996320.32031.python-list@python.org>
	<1174026699.143415.69940@n59g2000hsh.googlegroups.com>
	<mailman.5170.1174032315.32031.python-list@python.org>
	<1174034766.213528.164170@e65g2000hsc.googlegroups.com>
	<e3hrc4-1f7.ln1@www.researchut.com>
Message-ID: <op.tpdoqml1x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 16 Mar 2007 19:08:14 -0300, Ritesh Raj Sarraf <rrs at researchut.com>  
escribi?:

>> But you miss the fact that there is only one environment per process.
>
> Maybe there's a confusion.
> The environment variable that I'm setting has noting to do with  
> ldapsearch. I
> use the environment variable as a filename to which ldapsearch can  
> redirect its
> output. And that I do is because the output can be huge and useless.
> Then I do some pattern matching on that file and filter my data and then  
> delete
> it.
>
> If you think I still am missing something important, request you to  
> describe it.

Then, why do you use an environment variable? Just redirect the output to  
the desired file name (when you are making the command line to be executed  
by os.system)

-- 
Gabriel Genellina



From steve at REMOVEME.cybersource.com.au  Mon Mar  5 03:49:58 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Mon, 05 Mar 2007 19:49:58 +1100
Subject: Getting external IP address
Message-ID: <pan.2007.03.05.08.49.56.620290@REMOVEME.cybersource.com.au>

I have a PC behind a firewall, and I'm trying to programmatically
determine the IP address visible from outside the firewall.

If I do this:

>>> import socket
>>> socket.gethostbyname(socket.gethostname())
'127.0.0.1'
>>> socket.gethostbyname_ex(socket.gethostname())
('localhost.localdomain', ['localhost'], ['127.0.0.1'])

I get my internal IP address, which is not what I want.

Other tricks, like parsing the output of os.system('/sbin/ifconfig eth0')
also give me my internal IP address.

I found this post on comp.lang.python a few years ago:

http://mail.python.org/pipermail/python-list/2003-March/192495.html

which seems like it _should_ do what I want, but it doesn't: I get an
exception.

>>> from httplib import HTTPConnection
>>> from xml.dom.ext.reader.Sax import FromXmlStream
>>> conn = HTTPConnection('xml.showmyip.com')
>>> conn.request('GET', '/')
>>> doc = FromXmlStream(conn.getresponse())
>>> print doc.getElementsByTagName('ip')[0].firstChild.data
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.4/UserList.py", line 28, in __getitem__
    def __getitem__(self, i): return self.data[i]
IndexError: list index out of range
>>> conn.close()

I don't know how to fix it so that it works.

Can anyone help me fix that code snippet, or suggest another (better) way
to get the externally visible IP address?


-- 
Steven D'Aprano 



From arnodel at googlemail.com  Fri Mar  2 18:14:13 2007
From: arnodel at googlemail.com (Arnaud Delobelle)
Date: 2 Mar 2007 15:14:13 -0800
Subject: class declaration shortcut
In-Reply-To: <54rfmmF22ck5iU3@mid.individual.net>
References: <1172690801.455359.79410@q2g2000cwa.googlegroups.com>
	<54mh20F21ho3eU1@mid.individual.net>
	<45e61068$0$30655$426a34cc@news.free.fr>
	<54msaoF21c6h3U3@mid.individual.net>
	<pan.2007.03.01.08.40.12.770567@gmx.net>
	<1172741018.978417.233160@v33g2000cwv.googlegroups.com>
	<54nlkgF21ft8aU3@mid.individual.net>
	<pan.2007.03.02.02.15.56.940730@REMOVEME.cybersource.com.au>
	<54qsj0F21kdccU1@mid.individual.net>
	<1172854988.054997.264620@j27g2000cwj.googlegroups.com>
	<54rfmmF22ck5iU3@mid.individual.net>
Message-ID: <1172877253.545880.312240@p10g2000cwp.googlegroups.com>

On Mar 2, 8:28 pm, Bjoern Schliessmann <usenet-
mail-0306.20.chr0n... at spamgourmet.com> wrote:
> This is somehow contrary to my understanding of the Python names
> concept.
>
> What if I use a loop to define several classes based on data --
> they'll all have the same __name__ unless I change it manually.

Well that's not a typical way of defining classes.  It is then your
job to name those classes.

> Having this __name__ attribute set seems to me like "magic behind
> the lines" which Python strives to evade, doesn't it? Personally,
> I'd prefer inserting a mechanism for this manually if and when I
> really need the functionality, but see below.

So you want a Class object without a __name__, and then you would
subclass it to NamedClass with a __name__.
OTOH every class that you define in python using the 'class' keyword
has an obvious name (the identifier that follows the 'class' keyword),
so it seems natural to me to endow each defined class with a __name__.

> > What I described above is quite useful I think.  The alternative
> > (anonymous classes) is that given an object myobj you have no
> > means to find out what its class is (by that I mean to be able to
> > locate the class definition in your source code), apart from
> > stabbing in the dark (i.e. trying type(myobj)==someclass until
> > successful).
>
> In the typical case where you have one name per class definition,
> yes.

As you say this is the typical case, and a __name__ attribute is very
useful in this case.  For the minority of cases when you have a class
factory for example, then I guess it is your responsibility to name
the class appropriately.

IMHO if you create classes in a way that makes it  impossible to name
them naturally, then it is likely that you are misusing the class
object.

> Perhaps I'm lacking a typical application of __name__; that must be
> why I'm so stubborn here ;)

Here are 3 (please correct me if I'm wrong)

>>> class Foo: pass
>>> Foo    # typical application 1
<class __main__.Foo at 0x136ef30>
>>> foo=Foo()
>>> foo    # typical application 2
<__main__.Foo instance at 0x1372788>
>>> pickle.dumps(foo)    # typical application 3
 '(i__main__\nFoo\np0\n(dp1\nb.'

--
Arnaud



From aleax at mac.com  Sun Mar 11 21:56:08 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 18:56:08 -0700
Subject: Signed zeros: is this a bug?
References: <1173627073.507023.36070@j27g2000cwj.googlegroups.com>
	<1hut07q.1fhewdebmz1c0N%aleax@mac.com>
	<1173635074.726444.88760@t69g2000cwt.googlegroups.com>
	<1hut4yc.o9f1kta318hnN%aleax@mac.com>
	<1hut7xu.5zs31l1cohfybN%aleax@mac.com>
	<Xns98F0AFA4DC7DAtim111one@216.196.97.136>
Message-ID: <1hutqrd.1yvvkp9nc4yrlN%aleax@mac.com>

Tim Peters <tim.one at comcast.net> wrote:
   ...
> It's a bug that keeps resurfacing, probably because there's no portable
> way to test that it stays fixed :-( (it's not an accident that the OP
> relied on atan2 to distinguish +0.0 from -0.0!  they act the same in 

Please take a look at my patch 1678668, brand new at
<http://sourceforge.net/tracker/index.php> and as yet unassigned (hint,
hint:-).

I hope it satisfies your very reasonable lament about the bug
resurfacing once in a while, since it included one more unittest to
check whether the bug is there (TDD rocks!-), based exactly on the
behavior of atan2 (only on IEEE-format machines, though).

> 2.5 introduced a new front end and more ambitious constant-folding, and
> I expect the bug showed up again due to one of those.

Yep, in ast.c's ast_for_factor -- it lacks the specialcasing that
peephole.c does have (and my patch essentially adds it back).

If it's worth specialcasing in peephole.c (and I strongly agree with
Raymond's implicit opinion that it is), it should be just as worth
specialcasing in ast.c, no?-)


Alex


From gagsl-py2 at yahoo.com.ar  Wed Mar 14 16:42:26 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 14 Mar 2007 17:42:26 -0300
Subject: python/C++ wrapper
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
Message-ID: <op.to6440zkx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 14 Mar 2007 01:55:55 -0300, Frank <supervau at gmail.com> escribi?:

> is there anyone here that calls C++ programs from python via swig? It

I suggest you read the responses to your previous question; also search  
the list archives for this month.

-- 
Gabriel Genellina



From DustanGroups at gmail.com  Mon Mar 19 06:06:21 2007
From: DustanGroups at gmail.com (Dustan)
Date: 19 Mar 2007 03:06:21 -0700
Subject: Private data
In-Reply-To: <45fe5335$0$14570$426a74cc@news.free.fr>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<45fe5335$0$14570$426a74cc@news.free.fr>
Message-ID: <1174298781.038887.29330@b75g2000hsg.googlegroups.com>

On Mar 19, 4:09 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Dustan a ?crit :
>
> >http://dustangroups.googlepages.com/privateattributesinpython
>
> > This is something that I just threw together this morning, after a
> > eureka moment. It's a way of creating private class attributes
>
> What for ? We already have one: prefix 'private' names with a single
> underscore.
>
> > and
> > static function variables (I'm not 100% sure if that's the correct
> > terminology, but you get what I mean).
>
> def somefunc(param, _statics={}):
>    # code here
>
> > I haven't tried to create
> > private instance attributes, mainly because it would just be too
> > difficult,
>
> Same recipe as above : single leading underscore.
>
> > and it would be awful syntax. I'm not considering actually
> > using this, but I do have a couple questions about it.
>
> > 1. Has anyone else ever come up with something like this? I can't
> > imagine I'm the only person who's ever thought of this.
>
> With something like trying to forcefit access restriction in Python ?
> Nope, you're not the first one here. I've not seen anyone using such a
> thing in any of the projects I've worked on/with yet.

You ignored certain parts of my post, like "I'm not considering
actually using this, but I do have a couple questions about it"; I
assume that means you're not even going to begin to attempt to answer
my queries. Likewise, you ignored a similar message on the page I
linked to. I already knew about everything you told me.

With all this active ignoring, I get the feeling you're not even
trying to respond to my questions. So why respond in the first place?
Were you trying to be hostile? Because I can't see any other intent
for your post.



From anton.vredegoor at gmail.com  Thu Mar 22 19:00:12 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Fri, 23 Mar 2007 00:00:12 +0100
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <87aby59dy1.fsf@pobox.com>
References: <mailman.5428.1174517933.32031.python-list@python.org>
	<ettgei$rki$1@news2.zwoll1.ov.home.nl>
	<mailman.5446.1174557039.32031.python-list@python.org>
	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>
	<mailman.5460.1174570842.32031.python-list@python.org>
	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
	<etul70$l3b$1@news4.zwoll1.ov.home.nl> <87aby59dy1.fsf@pobox.com>
Message-ID: <etv1mu$uuu$1@news1.zwoll1.ov.home.nl>

John J. Lee wrote:

> You may not realise it if you haven't been applying for work since you
> did that, but I'm sure you've done a lot for your "employability" (I
> hate that word, it implies that it's a one-sided business, clearly
> false) by working as a freelancer.

Since I'm freelancing my leverage has been a lot better and it has 
resulted in a few short term regular job contracts. Unfortunately 
there's also the new problem that when people learn that they can also 
employ me as a freelancer they might prefer that, since it gives them 
less risk, but then they don't want to pay me a freelance tariff :-(

> Your original rant seemed rather one-sided, though.

Yes, I tried to let it slip that it was a rant. At least it has got some 
discussion going.

>> The basic problem however is that it's just not anyones business
>> whether one has been walking through the country making pictures or
>> doing some desk job. All that should matter is can he do the job and
>> is he motivated. Asking a person who he *is* (resume) is not Pythonic!
> 
> I sympathise but conventional wisdom (which surely has a lot of truth
> in it) is that employers are not faced with the problem of minimising
> false negatives (failing to hire when they should have hired).  They
> are faced with the problem of minimising false positives (hiring when
> they should not have hired).  That's a gross simplification of course,
> but I'm sure you appreciate the point -- if you're hiring employees,
> being fairly risk-averse is probably quite rational.

So when we really mean business, you're back to static typing?

> I've often thought that randomness is a good thing here though,
> globally -- a world of perfectly rational selfish employers would fail
> to employ legions of highly productive people.  Luckily incompetence
> in hiring steps in often enough to save the day, in this best of all
> possible worlds <0.75 wink>

For me it's easy: I just can't stand handing over my resume anymore 
(that's because of severe psychological damage caused by the Dutch 
social security system), so whatever happens, I'm forced to find 
rational employers. And with rational I mean a dynamically typing 
employer! I'm the kind of employee object that when it gets typechecked 
it raises a ResumeError.

> (no hiring incompetence at the employer I'm just about to move to, it
> goes without saying :-)

Well, on my next leisurely stroll along the river side, I will 
consciously enjoy the freedom of currently having no job instead of the 
usual "I'm lucky I have no kids to worry about", just to humor you!

A.


From duncan.booth at invalid.invalid  Wed Mar 21 07:44:39 2007
From: duncan.booth at invalid.invalid (Duncan Booth)
Date: 21 Mar 2007 11:44:39 GMT
Subject: Still the __new__ hell ...
References: <1174167360.522350@jubilee.claranet.pt>
	<45fe7f46$0$2138$426a74cc@news.free.fr>
	<1174337519.926611@jubilee.claranet.pt>
Message-ID: <Xns98FA7635B2CEAduncanbooth@127.0.0.1>

Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:

> As a relatively inexperient
> in python, how could I know that a 'string' is an instance of
> basestring?

I think a good tip for anyone learning Python (or upgrading from an earlier 
version) is to do:

    dir(__builtins__)

at the interactive prompt and read through the list it produces working out 
what each builtin does. Some of them you can ignore(1), some you can file 
away as interesting to know they exist but you don't need to know the 
details today(2), and others are indispensible(3).

Do that and you'll find basestring (category 2 until you needed to ask your 
question) between apply (category 1) and bool (category 3).


From attn.steven.kuo at gmail.com  Thu Mar 29 11:13:39 2007
From: attn.steven.kuo at gmail.com (attn.steven.kuo at gmail.com)
Date: 29 Mar 2007 08:13:39 -0700
Subject: make RE more cleaver to avoid inappropriate :
	sre_constants.error: redefinition of group name
In-Reply-To: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
References: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
Message-ID: <1175181219.665717.218200@o5g2000hsb.googlegroups.com>

On Mar 29, 7:22 am, "aspineux" <aspin... at gmail.com> wrote:
> I want to parse
>
> 'foo at bare' or '<foot at bar>' and get the email address foo at bar
>
> the regex is
>
> r'<\w+@\w+>|\w+@\w+'
>
> now, I want to give it a name
>
> r'<(?P<email>\w+@\w+)>|(?P<email>\w+@\w+)'
>
> sre_constants.error: redefinition of group name 'email' as group 2;
> was group 1
>
> BUT because I use a | , I will get only one group named 'email' !
>
> Any comment ?
>
> PS: I know the solution for this case is to use  r'(?P<lt><)?(?P<email>
> \w+@\w+)(?(lt)>)'



Regular expressions, alternation, named groups ... oh my!

It tends to get quite complex especially if you need
to reject cases where the string contains a left bracket
and not the right, or visa-versa.

>>> pattern = re.compile(r'(?P<email><\w+@\w+>|(?<!<)\b\w+@\w+\b(?!>))')
>>> for email in ('foo at bar' , '<foo at bar>', '<start at without_end_bracket'):
...     matched = pattern.search(email)
...     if matched is not None:
...         print matched.group('email')
...
foo at bar
<foo at bar>


I suggest you try some other solution (maybe pyparsing).

--
Hope this helps,
Steven



From john106henry at hotmail.com  Fri Mar  9 18:59:13 2007
From: john106henry at hotmail.com (John Henry)
Date: 9 Mar 2007 15:59:13 -0800
Subject: File IO errors with PyPDF
Message-ID: <1173484753.382459.228980@8g2000cwh.googlegroups.com>

Hi list,

I am having trouble with PyPDF (tried earlier as well as latest
version 1.9).   I am using it to combine a number of single page PDF
files into one.  It works perfectly for up to 8 files but after that,
I get a "too many files opened" message.  My code goes somewhat like:

PdfOutput = PdfFileWriter()
ofile = ...name of the combined pdf...

for doc_file in (....a bunch of single page pdf files...)
	inp=file(doc_file, "rb")
	PdfOutput.addPage(PdfFileReader(inp).getPage(0))
	inp.close()

outputStream = file(ofile, "wb")
PdfOutput.write(outputStream)
outputStream.close()

As you can see, I closed each one of the files before proceeding and
yet I get the "too many files opened" exception.

In addition, sometimes I get a "file already closed" message from
the .write function even when the number of files are small (like 5).

Anybody has any suggestions?

If not, do you have recommendations for alternative package?  My needs
are very simple - I just need to combine the single page pdfs into
one.

Regards,



From stuart at stuartbishop.net  Tue Mar  6 07:46:41 2007
From: stuart at stuartbishop.net (Stuart Bishop)
Date: Tue, 06 Mar 2007 19:46:41 +0700
Subject: pytz2007c error
In-Reply-To: <1173174119.588427.315110@j27g2000cwj.googlegroups.com>
References: <1173171115.780320.203500@64g2000cwx.googlegroups.com>
	<1173174119.588427.315110@j27g2000cwj.googlegroups.com>
Message-ID: <45ED62B1.6090807@stuartbishop.net>

looping wrote:
> On Mar 6, 9:51 am, "looping" <kad... at gmail.com> wrote:
>> Hi,
>> Why this error ?
>>
>>>>> from pytz import timezone
>>>>> eastern = timezone('US/Eastern')
>> Traceback (most recent call last):
>>   File "<interactive input>", line 1, in <module>
>>   File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
>> \__init__.py", line 93, in timezone
>>   File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
>> \tzfile.py", line 33, in build_tzinfo
>>     for trans in data[:timecnt]]
>>   File "C:\Python25\lib\site-packages\pytz-2007c-py2.5.egg\pytz
>> \tzinfo.py", line 27, in memorized_datetime
>>     dt = datetime.utcfromtimestamp(seconds)
>> ValueError: timestamp out of range for platform localtime()/gmtime()
>> function
>>
>> I'm running python 2.5 on WinXP French with the egg from CheeseShop.
>>
>> Same error with all timezone (like timezone('Europe/Zurich'),
>> timezone('Europe/Amsterdam'), ...) except a few one:>>> print timezone('UTC')
>>
>> UTC
>>
>> Is this a pytz problem or something I didn't understand ?
> 
> OK, the error come from datetime.utcfromtimestamp that doesn't support
> negative value.
> pytz try to pass -1633280400 to this function.
> 
> Is this a problem from Windows ?

Looks like it. I've opened a bug.

https://bugs.beta.launchpad.net/pytz/+bug/90096

Current workaround is to use an earlier release. This will be fixed as pytz 
needs to remain cross platform.

-- 
Stuart Bishop <stuart at stuartbishop.net>
http://www.stuartbishop.net/

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From xah at xahlee.org  Thu Mar 29 11:01:37 2007
From: xah at xahlee.org (Xah Lee)
Date: 29 Mar 2007 08:01:37 -0700
Subject: What are OOP's Jargons and Complexities
Message-ID: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>

What are OOP's Jargons and Complexities

Xah Lee, 20050128

Classes, Methods, Objects

In computer languages, often a function definition looks like this:

subroutine f (x1, x2, ...) {
  variables ...
  do this or that
}

In advanced languages such as LISP family, it is not uncommon to
define functions inside a function. For example:

subroutine f (x1, x2, ...) {
  variables...
  subroutine f1 (x1...) {...}
  subroutine f2 (x1...) {...}
}

Often these f1 f2 inner functions are used inside f, and are not
relevant outside of f. Such power of the language gradually developed
into a style of programing. For example:

subroutine a_surface () {
  coordinatesList = ...;
  subroutine translate (distance) {...}
  subroutine rotate (angle) {..}
}

Such a style is that the a_surface is no longer viewed as a function.
But instead, a boxed set of functions, centered around a piece of
datum. And, all functions for manipulating this piece of datum are all
embodied in this function. For example:

subroutine a_surface (arg) {
  coordinatesList = ...
  subroutine translate (distance) {set coordinatesList to translated
version}
  subroutine rotate (angle) {set coordinatesList to rotated version}
  subroutine return () {return coordinatesList}

  if (no arg) {do nothing}
    else { apply arg to coordinatesList }
}

In this way, one uses a_surface as a piece of datum that are bundled
with its own set of functions:

mySurface = a_surface           // assign subroutine to a variable
mySurface(rotate(angle))        // now the surface datum has been
rotated
mySurface(translate(distance))  // now its translated
newSurface = mySurface(return())

So now, a_surface is no longer viewed as a subroutine, but a boxed set
of things centered around a piece of datum. All functions that work on
the datum are included in the boxed set. This paradigm possible in
functional languages has refined so much so that it spread to other
groups and became known as Object Oriented Programing, and complete
languages with new syntax catered to such scheme emerged.

In such languages, instead of writing them like this:

mySurface = a_surface;
mySurface(rotate(angle));

the syntax is changed to like this, for example:

mySurface = new a_surface();
mySurface.rotate(angle);

In such languages, the super subroutine a_surface is no longer called
a function or subroutine. It is now called a ?Class?. And now the
variable holding the function "mySurface" is now called a ?Object?.
Subroutines inside the function a_surface are no longer called inner-
subroutines. They are called ?Methods?. The act of assigning a super-
subroutine to a variable is called instantiation.

This style of programing and language has become so fanatical that in
such dedicated languages like Java, everything in the language are
Classes. One can no longer just define a variable or subroutine.
Instead, one defines these super-subroutines (classes) that has inner-
subroutines (methods). Every line of code are now inside such super-
subroutine. And one assigns subroutines to variables inside other
subroutines to create objects. And one calls inner-subroutines
(methods) thru these ?object? variables to manipulate the data defined
in the super-subroutine. In this fashion, even basic primitives like
numbers, strings, and lists are no longer atomic entities. They are
now subroutines with inner-subroutines.

For example, in Java, a string is a class String. And inside the class
String, there are Methods to manipulate strings, such as finding the
number of chars, or extracting parts of the string. This can get very
complicated. For example, in Java, there are actually two Classes of
strings: One is String, and the other is StringBuffer. Which one to
use depends on whether you intend to change the datum.

So, a simple code like this in normal languages:

a = "a string";
b = "another one";
c = join(a,b);
print c;

or in lisp style

(set a "a string")
(set b "another one")
(set c (join a b))
(print c)

becomes in Java:

public class test {
  public static void main(String[] args) {
    String a = new String("a string");
    String b = new String("another one");
    StringBuffer c = new StringBuffer(40);
    c.append(a); c.append(b);
    System.out.println(c.toString());
    }
}

Here, the ?new String? creates a String object. The ?new
StringBuffer(40)? creates the changeable string object StringBuffer,
with room for 40 chars. ?append? is a method of StringBuffer. It is
used to join two Strings.

Notice the syntax ?c.append(a)?, which we can view it as calling a
inner-subroutine ?append?, on a super-subroutine that has been
assigned to c, where, the inner-subroutine modifies the inner datum by
appending the value of a to it.

And in the above Java example, StringBuffer class has another method
?toString()? used to convert this into a String Class, necessary
because System.out.println's parameter requires a String type, not
StringBuffer.

For a example of the complexity of classes and methods, see the Java
documentation for the StringBuffer class at
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/StringBuffer.html
(local copy)

In the same way, numbers in Java have become a formalization of many
classes: Double, Float, Integer, Long... and each has a collection of
?methods? to operate or convert from one to the other.

Instead of

aNumber = 3;
print aNumber^2;

In Java the programer needs to master the ins and outs of the several
number classes, and decide which one to use. (and if a program later
needs to change from one type of number to another, it is often
cumbersome.)

This Object Oriented Programing style and dedicated languages (such as
C++, Java) have become a fad like wild fire among the programing mass
of ignoramuses in the industry. Partly because of the data-centric new
perspective, partly because the novelty and mysticism of new syntax
and jargonization.

It is especially hyped by the opportunist Sun Microsystems with the
inception of Java, internet, and web applications booms around 1995.
At those times, OOP (and Java) were thought to revolutionize the
industry and solve all software engineering problems, in particular by
certain ?reuse of components? concept that was thought to come with
OOP. (we will cover the ?reuse? issue in the inheritance section
later.)

As part of this new syntax and purity, where everything in a program
is of Classes and Objects and Methods, many complex issues and concept
have arisen in OOP from both the OOP language machinery as well as a
engineering practice.

We now know that the jargon Class is originally and effectively just a
boxed set of data and subroutines, all defined inside a subroutine.
And the jargon Object is just a variable that has been set to this
super-subroutine. And the inner-subroutines are what's called Methods.

-----------
The above is a excerpt from the article
?What are OOP's Jargons and Complexities?.
The full article is available at
http://xahlee.org/Periodic_dosage_dir/t2/oop.html

  Xah
  xah at xahlee.org
? http://xahlee.org/



From lew at nospam.lewscanon.com  Fri Mar 30 09:05:48 2007
From: lew at nospam.lewscanon.com (Lew)
Date: Fri, 30 Mar 2007 09:05:48 -0400
Subject: What are OOP's Jargons and Complexities
In-Reply-To: <460cc83a.2652073@news.readfreenews.net>
References: <1175180497.362830.285710@y80g2000hsf.googlegroups.com>
	<Fo2Ph.12350$Um6.9109@newssvr12.news.prodigy.net>
	<460cc83a.2652073@news.readfreenews.net>
Message-ID: <kKCdnbCHbYqwlpDbnZ2dnUVZ_oDinZ2d@comcast.com>

Timofei Shatrov wrote:
> On Fri, 30 Mar 2007 06:48:05 GMT, "Mike Schilling" <mscottschilling at hotmail.com>
> tried to confuse everyone with this message:
> 
>> Xah Lee wrote:
>>
>>> So, a simple code like this in normal languages:
> 
>>> becomes in Java:
>>>
>>>
>> Only when written by someone almost entirely ignorant of Java. 
>>
> 
> Which is the state most people want to be in...

As a particular case of the general proposition that most people want to be 
ignorant of computer programming.

-- Lew


From gagsl-py2 at yahoo.com.ar  Sat Mar 24 17:27:50 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Sat, 24 Mar 2007 18:27:50 -0300
Subject: A better webpage filter
References: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl>
Message-ID: <op.tpppworwx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Sat, 24 Mar 2007 15:45:41 -0300, Anton Vredegoor  
<anton.vredegoor at gmail.com> escribi?:

> Since a few days I've been experimenting with a construct that enables
> me to send the sourcecode of the web page I'm reading through a Python
> script and then into a new tab in Mozilla. The new tab is automatically
> opened so the process feels very natural, although there's a lot of
> reading, filtering and writing behind the scene.
>
> I want to do three things with this post:
>
> A) Explain the process so that people can try it for themselves and say
> "Hey stupid, I've been doing the same thing with greasemonkey for ages",
> or maybe "You're great, this is easy to see, since the crux of the
> biscuit is the apostrophe."  Both kind of comments are very welcome.

I use the Opera browser: http://www.opera.com
Among other things (like having tabs for ages!):
- enable/disable tables and divs (like you do)
- enable/disable images with a keystroke, or only show cached images.
- enable/disable CSS
- banner supressing (aggressive)
- enable/disable scripting
- "fit to page width" (for those annoying sites that insist on using a  
fixed width of about 400 pixels, less than 1/3 of my actual screen size)
- apply your custom CSS or javascript on any page
- edit the page source and *refresh* the original page to reflect your  
changes

All of this makes a very smooth web navigation - specially on a slow  
computer or slow connection.

-- 
Gabriel Genellina



From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 12:25:02 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 03:25:02 +1100
Subject: Garbage collection
References: <etrb1q$t01$1@gemini.csx.cam.ac.uk>
	<mailman.5394.1174484981.32031.python-list@python.org>
	<etrhfo$bv3$1@gemini.csx.cam.ac.uk>
Message-ID: <pan.2007.03.21.16.25.02.135904@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 15:03:17 +0000, Tom Wright wrote:

[snip]

> Ah, thanks for explaining that.  I'm a little wiser about memory allocation
> now, but am still having problems reclaiming memory from unused objects
> within Python.  If I do the following:
> 
>>>>
> (memory use: 15 MB)
>>>> a = range(int(4e7))
> (memory use: 1256 MB)
>>>> a = None
> (memory use: 953 MB)
> 
> ...and then I allocate a lot of memory in another process (eg. open a load
> of files in the GIMP), then the computer swaps the Python process out to
> disk to free up the necessary space.  Python's memory use is still reported
> as 953 MB, even though nothing like that amount of space is needed.

Who says it isn't needed? Just because *you* have only one object
existing, doesn't mean the Python environment has only one object existing.


> From what you said above, the problem is in the underlying C libraries, 

What problem? 

Nothing you've described seems like a problem to me. It sounds like a
modern, 21st century operating system and programming language working
like they should. Why do you think this is a problem?

You've described an extremely artificial set of circumstances: you create
40,000,000 distinct integers, then immediately destroy them. The obvious
solution to that "problem" of Python caching millions of integers you
don't need is not to create them in the first place.

In real code, the chances are that if you created 4e7 distinct integers
you'll probably need them again -- hence the cache. So what's your actual
problem that you are trying to solve?


> but is there anything I can do to get that memory back without closing
> Python?

Why do you want to manage memory yourself anyway? It seems like a
horrible, horrible waste to use a language designed to manage memory for
you, then insist on over-riding it's memory management.

I'm not saying that there is never any good reason for fine control of the
Python environment, but this doesn't look like one to me.


-- 
Steven.



From skip at pobox.com  Thu Mar 29 12:02:17 2007
From: skip at pobox.com (skip at pobox.com)
Date: Thu, 29 Mar 2007 11:02:17 -0500
Subject: File deletion after 72 hours of creation
In-Reply-To: <1175183124.401829.41330@n76g2000hsh.googlegroups.com>
References: <1175183124.401829.41330@n76g2000hsh.googlegroups.com>
Message-ID: <17931.58121.553498.268580@montanaro.dyndns.org>


    Alex> I'm looking for a simple method to delete a folder after 72
    Alex> "Business hours" (saturday/sunday doesnt count) since its
    Alex> creation. Note that This is on a linux system and I realize that
    Alex> it will be the last modified time. These files wont be modified
    Alex> since their creation.

    Alex> Im very confused on how to work with the number easily.

Take a look at the dateutil module.  Its relativedelta object has some
weekday sense:

    http://labix.org/python-dateutil

Skip


From bruno.desthuilliers at gmail.com  Thu Mar  1 07:40:15 2007
From: bruno.desthuilliers at gmail.com (bruno.desthuilliers at gmail.com)
Date: 1 Mar 2007 04:40:15 -0800
Subject: Python installation problem (sorry if this is a dup)
In-Reply-To: <mailman.4552.1172726571.32031.python-list@python.org>
References: <mailman.4552.1172726571.32031.python-list@python.org>
Message-ID: <1172752815.440938.215250@s48g2000cws.googlegroups.com>

On 1 mar, 06:22, Ray Buck <r... at xmission.com> wrote:
> I've been trying to install Mailman, which requires a newer version
> of the Python language compiler (p-code generator?)

It's actually the whole thing : (byte-code) compiler, virtual machine,
and stdlib.

> than the one I
> currently have on my linux webserver/gateway box.
>
> It's running a ClarkConnect 2.01 package based on Red Hat 7.2 linux.
>
> I downloaded the zipped tarball (Python-2.4.4.tgz), ran gunzip, then
> un-tarred it in /usr/local.  Then (logged in as root) from
> /usr/local/Python-2.4.4 I ran the configure script which appeared to
> run properly.  At least there were no error messages that I
> saw.  Then I attempted to run "make install" and ended up with an
> error "make *** Error 1".  It was right at the "libinstall" section
> of the make, so I did some googling and came up with the following command:
> [root at gateway Python-2.4.4]# make libinstall inclinstall
>
> After thrashing for about 5 minutes, I got basically the same message:
> Compiling /usr/local/lib/python2.4/zipfile.py ...
> make: *** [libinstall] Error 1

Nothing else between these two lines ?

> I dunno if this is relevant, but I have Python 2.2.2 in the
> /usr/Python-2.2.2 directory.  Do I have to blow this away in order to
> install the newer distro?

I don't know your distrib, but it may depend on this specific python
version.
<wild-guess>
You may want to specify the --prefix before running configure, and use
make altinstall instead of make install.
</wild-guess>

> Or do I need to install the new one in/usr
> instead of /usr/local?

The old one is in /usr/local ? If so, it may not be part of your linux
distro.

FWIW, you should perhaps post the same question on your linux distro's
mailing list.

> Although I'm a retired programmer (mainframes), I'm still learning
> this linux stuff.  I guess that makes me a noob...I hope you'll take
> that into consideration.

We're all newbies one way or another !-)



From john.davis.85 at gmail.com  Thu Mar 29 16:20:26 2007
From: john.davis.85 at gmail.com (John Davis)
Date: Thu, 29 Mar 2007 13:20:26 -0700
Subject: Any "consumer review generators" available?
In-Reply-To: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
References: <NYidnYp6I5PVnpHbnZ2dnUVZ_sqdnZ2d@giganews.com>
Message-ID: <61fdaffc0703291320u63c4e557q3719c0aabd569015@mail.gmail.com>

Hi all,
I am using Python 2.4. I am trying to run a C++ program on Red hat linux
enterprise edition from Python by using various methods like > Os.system
>
> Os.popen
>
> Subprocess.popen
>
> Os.execvp
>
> Os.spawnl
>

In all of these methods the program kills python program also. So, let's say
i am in python shell as follows

$> python
Python 2.4.4 (#1, Mar 28 2007, 15:30:40)
[GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>>os.system('program_name')
.......
.......
#program_output
.......
.......
No more foreground apps, exiting
Signal received. Terminating
Signal received. Terminating
.......
.......
Hangup
......
......
$>

That is I exit the python shell as well. Please notice that Hangup written
in between which is not a part of the program output (i.e. I don't get this
'Hangup'  when I run the program independently from the command prompt). The
other things are part of the program output on stdout & stderr. Can anybody
give some pointers on how to solve this. I am running out of ideas on how to
run this program without exiting the python shell.


Thx
John.
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From deets at nospam.web.de  Fri Mar  9 09:31:45 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Fri, 09 Mar 2007 15:31:45 +0100
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<mailman.4847.1173435205.32031.python-list@python.org>
	<1173436274.346506.200920@q40g2000cwq.googlegroups.com>
	<55cs24F23meg4U1@mid.individual.net>
	<1173438105.600342.243200@n33g2000cwc.googlegroups.com>
	<55d34sF24ijrdU1@mid.individual.net>
	<1173448114.905480.47200@h3g2000cwc.googlegroups.com>
	<55d7t9F240tp2U1@mid.uni-berlin.de>
	<1173449933.926669.90810@n33g2000cwc.googlegroups.com>
Message-ID: <55d9ehF24cdi0U1@mid.uni-berlin.de>

dbhbarton at googlemail.com wrote:

> On 9 Mar, 14:05, "Diez B. Roggisch" <d... at nospam.web.de> wrote:
>> But you _can't_ profit from these conveniences, at least not the ?
>> character. It's just garbage put in there for some others to interpret,
>> meaningless to the interpreter. So it _always_ boils down to
>> editor-support.
> 
> I'm sorry I don't follow your logic. Meaningless to the interpreter,
> yes, meaningless to the IDE or to me, no. I "_can't_ profit from these
> conveniences"? Why ever not?

Exactly, the ? is meaningless to the language itself, it's only a comment
sign - but what you want is 

"""
1. The WIP (Work In Progress) comment:

A '?' placed in the preceding whitespace of a line as a means of
quickly highlighting a line or block of code for special attention.
"""

Now tell me - how exactly do you highlight a text? That is solely part of
the editor you use, either it will parse the ?  - the same way it would
parse a # fixme or # wip comment - and react accordingly, or it won't.

But for python itself, it has no meaning whatsoever, and would just be a
character to overread, introducing visual clutter.

So - if you want that feature, patch your editor of choice to deal with that
comments, make them added and removed with a key stroke, whatever - be my
guest. But it has nothing to do with _python_ the language, so it doesn't
belong there.

Besides, I don't see how "quick highlighting of text" is something that
needs to be persisted anyway - if it is quick, hightlight it within the
editor until the file is closed. If not, it might be well worth a comment
anyway why you think it needs special attention.

Diez


From kyosohma at gmail.com  Thu Mar 29 09:53:47 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 29 Mar 2007 06:53:47 -0700
Subject: Problem with class variables
In-Reply-To: <pan.2007.03.29.13.43.05.686283@gmx.net>
References: <slrnf0nfph.8f9.f98dawa@remote1.student.chalmers.se>
	<pan.2007.03.29.13.43.05.686283@gmx.net>
Message-ID: <1175176427.603784.321620@e65g2000hsc.googlegroups.com>

On Mar 29, 8:43 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <slrnf0nfph.8f9.f98d... at remote1.student.chalmers.se>, Dag wrote:
> > I have a problem which is probaly very simple to solve, but I can't
> > find a nice solution.
> > I have the following code
>
> > class Test:
> >     def __init__(self):
> >         self.a=[1,2,3,4]
> >         self.b=self.a
>
>           self.b = list(self.a)
>
> BTW this is about instance variable, not class variables.
>
> Ciao,
>         Marc 'BlackJack' Rintsch

One of the many ways to do this:

class Test:
    def __init__(self):
        self.a=[1,2,3,4]
        #self.b=self.a
    def swap(self):
        self.a[0],self.a[3]=self.a[3],self.a[0]
        return self.a
    def prnt(self):
        print self.a
        x = self.swap()
        print x

c=Test()
c.prnt()


Mike



From steven.bethard at gmail.com  Sat Mar 24 03:07:33 2007
From: steven.bethard at gmail.com (Steven Bethard)
Date: Sat, 24 Mar 2007 01:07:33 -0600
Subject: Multi-line strings with formatting
In-Reply-To: <1174703993.715410.173780@e65g2000hsc.googlegroups.com>
References: <1174668885.347602.117970@n59g2000hsh.googlegroups.com>
	<1174669850.3450.40.camel@dot.uniqsys.com>
	<mailman.5524.1174674566.32031.python-list@python.org>
	<1174703993.715410.173780@e65g2000hsc.googlegroups.com>
Message-ID: <SOudndfNosWoU5nbnZ2dnUVZ_hOdnZ2d@comcast.com>

On Fri, 2007-03-23 at 09:54 -0700, gburde... at gmail.com wrote:
 > When constructing a particularly long and complicated command to be
 > sent to the shell, I usually do something like this, to make the
 > command as easy as possible to follow:
 > commands.getoutput(
 >     'mycommand -S %d -T %d ' % (s_switch, t_switch)   +
 >     '-f1 %s -f2 %s '         % (filename1, filename2) +
 >     '> %s'                   % (log_filename)
 >     )
 > Can anyone suggest a better way to construct the command, especially
 > without the "+" sign at the end of each line (except the last) ?

Paul McGuire wrote:
> This list might be even simpler to follow:
> 
> l = [
>      'mycommand',
>      '-S', s_switch,
>      '-T', t_switch,
>      '-f1', filename1,
>      '-f2', filename2,
>      '>', log_filename
>     ]
> cmd = " ".join(l)

And if you use the subprocess module, you won't even need (or want) the 
final join.

STeVe


From venkattraman04 at gmail.com  Tue Mar 27 03:49:19 2007
From: venkattraman04 at gmail.com (Venkattraman A)
Date: Tue, 27 Mar 2007 13:19:19 +0530
Subject: [ANN] python-gastables : Python modules for Compressible Gas Flow
	Calculations
Message-ID: <a7f5756b0703270049x2b10e9efr7f0fad441059cc36@mail.gmail.com>

Hello Pythoners! I would like to announce the first release of a Gas table
module for Python, to perform compressible flow calculations.

python-gastables includes python modules for compressible gas flow
calculations. It includes python modules for Isentropic Relations, Normal
Shock Relations, Oblique Shock Relations, Fanno Flow, Isothermal Flow,
Rayleigh Flow and Prandtl Meyer Functions.

Find it at: http://sourceforge.net/projects/gastables

Comments, suggestions and feedback is welcome.
-- 
A.Venkattraman
Undergraduate Student
Department of Aerospace Engineering
Indian Institute of Technology Madras
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From bignose+hates-spam at benfinney.id.au  Sat Mar 24 04:16:08 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Sat, 24 Mar 2007 19:16:08 +1100
Subject: Making a non-root daemon process
References: <mailman.5504.1174630787.32031.python-list@python.org>
	<1174641365.623257.105690@p15g2000hsd.googlegroups.com>
	<878xdo1eql.fsf@benfinney.id.au>
Message-ID: <87r6rfys3b.fsf@benfinney.id.au>

Ben Finney <bignose+hates-spam at benfinney.id.au> writes:

> Hmm. I typed the example program in as a simplified version of what
> I'm doing; but didn't actually *run* it. When I do run it, I get no
> exception, as you say.
>
> Now I'll have to find out what significant difference there is
> between my failing code and this example, and report back in this
> thread.

It turns out that, in re-typing the algorithm in the newsgroup
message, I got all the branches correct; but in the code that wasn't
working, I had reversed one of them :-)

All fine now. We return you to your regularly scheduled programming.

-- 
 \       "My aunt gave me a walkie-talkie for my birthday. She says if |
  `\     I'm good, she'll give me the other one next year."  -- Steven |
_o__)                                                           Wright |
Ben Finney



From slm_guzel at hotmail.com  Sun Mar 25 14:40:14 2007
From: slm_guzel at hotmail.com (gslm)
Date: 25 Mar 2007 11:40:14 -0700
Subject: problem at installing phyton on windows
In-Reply-To: <1174846576.353998.161110@e65g2000hsc.googlegroups.com>
References: <1174846017.637862.284100@l77g2000hsb.googlegroups.com>
	<1174846576.353998.161110@e65g2000hsc.googlegroups.com>
Message-ID: <1174848014.932107.206320@e65g2000hsc.googlegroups.com>

On 25 Mart, 20:16, "Paul Boddie" <p... at boddie.org.uk> wrote:
> gslm wrote:
> > Hi!
> > I'm too new on phyton.I have installed phyton.But when I write phyton
> > command, unfortunately, i can't run.I suppose that it is bacause of
> > setting path.But i can't solve.
> > Can you help?
>
> It's "python" you should be typing, of course. If that doesn't work
> then it may be a PATH issue, yes.
>
> > Another thing is, when i double click the .py file, there are the
> > project form and the command line.How can i provide to view only the
> > project?
>
> I think you need to rename the .py file so that it ends with .pyw -
> this stops the command line window from opening, but it's only useful
> if you are running a graphical program, obviously.
>
> Paul

First, thaks a lot.
But I'm sorry.I haven't understood what i must do for ruunnig phyton
command.I delete path from proportiesof my computer.Then i open
command line of phyton.But when i write phyton these view below:
Traceback<most recent call last>:
File "<stdin>"; line 1 in <module>
NameError: name phyton is not defined
Sorry may be you think i'm comic but i am not be able to correct.



From gagsl-py2 at yahoo.com.ar  Wed Mar 21 01:48:07 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 21 Mar 2007 02:48:07 -0300
Subject: How to receive a FILE* from Python under MinGW?
References: <460078E1.7000905@student.unsw.edu.au>
	<6f7c837c0703202008u47d6f0bp4e8019925ca52e03@mail.gmail.com>
	<4600AA7B.1080605@student.unsw.edu.au>
	<mailman.5372.1174450550.32031.python-list@python.org>
	<1174451434.910082.231900@b75g2000hsg.googlegroups.com>
Message-ID: <op.tpiyehb0x6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 21 Mar 2007 01:30:34 -0300, John Pye <john.pye at gmail.com> escribi?:

> On Mar 21, 3:15 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> wrote:
>> En Wed, 21 Mar 2007 00:46:03 -0300, John Pye
>> <john.... at student.unsw.edu.au> escribi?:
>>
>> > This is not an option for me, as I want to pass the
>> > FILE* from Python and all the way into into a existing shared-library
>> > code. I can't change the latter; it must work ok with standard fprintf
>> > (etc) functions.
>>
>> You can get the file descriptor from the Python file object using its
>> fileno() method. The file descriptor lives at the OS level, so it's safe
>> to pass around. You can regenerate a new FILE struct (using the other
>> runtime library) with fdopen.
>>
>> --
>> Gabriel Genellina
>
> Hi Gabriel
>
> Are you sure about this? My understanding is that 'fileno' is just a
> FILE* cast to an integer. So it's a pointer to something (check out
> stdio.h to see what it points to). Problem is (AFAICT) that Python 2.4

A FILE struct usually *contains* a file descriptor, among other things.  
But I think the FILE struct is opaque and not specified. Perhaps one  
should go even at a lower level, using open_osfhandle and get_osfhandle.  
(From python you can use the msvcrt module). See  
http://msdn2.microsoft.com/en-us/library/kdfaxaay(VS.71).aspx
h=get_osfhandle(f.fileno()) returns a Windows file handle that you can  
pass around.
On the Mingw side: fd=open_osfhandle(h); FILE *f=fdopen(fd)

> uses a different version of the C runtime DLL (MSVCRT*.DLL) to that
> which MinGW links against. And it turns out that the different C
> runtime libraries have incompatible implementations of the FILE
> struct. And therefore if you try to pass a FILE* (fileno?) from Python
> to MinGW you will get a segfault.

Exactly; the idea is not to pass a foreign FILE struct, but to *contruct*  
another one based on an existing open file; this is what fdopen does.

> If there is more to your suggestion that I'm not seeing, please
> clarify. Have you tried this with  MinGW actually?

No, but I'm rather confident it should work... as always, it can fail  
miserably :)

-- 
Gabriel Genellina



From http  Fri Mar 16 02:09:55 2007
From: http (Paul Rubin)
Date: 15 Mar 2007 22:09:55 -0800
Subject: To count number of quadruplets with sum = 0
References: <1173998523.811044.299120@n76g2000hsh.googlegroups.com>
	<7xtzwldh28.fsf@ruckus.brouhaha.com>
	<7xtzwlkhq9.fsf@ruckus.brouhaha.com>
	<1174024143.049965.25710@l77g2000hsb.googlegroups.com>
	<1174024633.431427.236920@y66g2000hsf.googlegroups.com>
Message-ID: <7xslc5k9cc.fsf@ruckus.brouhaha.com>

"n00m" <n00m at narod.ru> writes:
> Two first outputs is of above (your) code; next two - of my code:

Yeah, I see now that we both used the same algorithm.  At first glance
I thought you had done something much slower.  The 10 second limit
they gave looks like they intended to do it about this way, but with a
compiled language.  68 seconds isn't so bad for 4000 entries in pure
CPython.  Next thing to do I think is use psyco or pyrex.


From eurleif at ecritters.biz  Thu Mar  1 06:42:22 2007
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 01 Mar 2007 06:42:22 -0500
Subject: How to Read Bytes from a file
In-Reply-To: <1hu9p0u.1rc19sp19r95zhN%aleax@mac.com>
References: <1172731976.798583.36220@t69g2000cwt.googlegroups.com>
	<1hu9p0u.1rc19sp19r95zhN%aleax@mac.com>
Message-ID: <45e6bc1b$0$6835$4d3efbfe@news.sover.net>

Alex Martelli wrote:
> You should probaby prepare before the loop a mapping from char to number
> of 1 bits in that char:
> 
> m = {}
> for c in range(256):
>   m[c] = countones(c)

Wouldn't a list be more efficient?

m = [countones(c) for c in xrange(256)]


From joel.granados at gmail.com  Wed Mar 14 06:33:03 2007
From: joel.granados at gmail.com (Joel Andres Granados)
Date: Wed, 14 Mar 2007 11:33:03 +0100
Subject: Attribute monitoring in a class
Message-ID: <45F7CF5F.7090005@gmail.com>

Hi list:

I have googled quite a bit on this matter and I can't seem to find what 
I need (I think Im just looking where I'm not suppose to :).  I'm 
working with code that is not of my authorship and there is a class 
attribute that is changes by directly referencing it (object.attr = 
value) instead of using a getter/setter (object.setAttr(Value) ) 
function.  The thing is that I have no idea when the change occurs and I 
would REALLY like to find out.
So here comes my question .....
Is there a function construct inside a python class that is 
automatically called when an attr is changed????
Like for example

/class Class:
    def __init__();
       self.attr = "whatever"

    def __attrChangeFunction__():
       print "It has changed"

obj = Class()
obj.attr = "other whatever"

*Output:*
It has changed

/
Thanks for the help.
Regards/
/


From egbert.bouwman at hccnet.nl  Thu Mar  8 05:08:17 2007
From: egbert.bouwman at hccnet.nl (egbert)
Date: Thu, 8 Mar 2007 11:08:17 +0100
Subject: is it possible to give an instance a value?
In-Reply-To: <pan.2007.03.08.02.22.25.527060@REMOVEME.cybersource.com.au>
References: <1173221145.793008.298940@v33g2000cwv.googlegroups.com>
	<pan.2007.03.07.03.21.21.381410@REMOVEME.cybersource.com.au>
	<mailman.4753.1173281501.32031.python-list@python.org>
	<pan.2007.03.08.02.22.25.527060@REMOVEME.cybersource.com.au>
Message-ID: <20070308100817.GA5725@hccnet.nl>

On Thu, Mar 08, 2007 at 01:22:25PM +1100, Steven D'Aprano wrote:

> On Wed, 07 Mar 2007 16:02:05 +0100, egbert wrote:
> > My impression is that you can do everything you want to
> > by making your instance callable, and not using a but a().
 
> You can't do this:
> 
> >>> a() = "some value"

I didn't say that you can do that. 
But in my example you can do
>>>  a("some value")
and that seems to be near enough for manstey.
e
-- 
Egbert Bouwman - Keizersgracht 197 II - 1016 DS  Amsterdam - 020 6257991
========================================================================


From lobais at gmail.com  Fri Mar  2 19:04:38 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Sat, 03 Mar 2007 01:04:38 +0100
Subject: How *extract* data from XHTML Transitional web pages? got
	xml.dom.minidom troubles..
References: <1172878378.291106.321050@h3g2000cwc.googlegroups.com>
Message-ID: <pan.2007.03.03.00.04.53@gmail.com>

Den Fri, 02 Mar 2007 15:32:58 -0800 skrev seberino at spawar.navy.mil:

> I'm trying to extract some data from an XHTML Transitional web page.
> xml.dom.minidom.parseString("text of web page") gives errors about it
> not being well formed XML.
> Do I just need to add something like <?xml ...?> or what?

As many HTML Transitional pages are very bad formed, you can't really 
create a dom of them.

I've written multiple grabbers, which grab tv data from html pages, and 
parses it into xml.

Basicly there are three ways to get the info:

  # Use find(): If you are only searching for a few data pieces, you 
might be able to find some html code always appearing before the data you 
need.

  # Use regular expressions: This can very quickly get all data from a 
table or so into a nice list. Only problem is regular expressions having 
a little steep learing curve.

  # Use a SAX parser: This will iterate through all html items, not 
carring if they validate or not. You will define a method to be called 
each time it finds a tag, a piece of text etc.

> What is best way to do this?

In the beginning I mostly did the SAX way, but it really generates a lot 
of code, which is not necessaryly more readable than the regular 
expressions.


From gagsl-py2 at yahoo.com.ar  Tue Mar 20 19:17:50 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 20:17:50 -0300
Subject: Imports
References: <1174415496.395993.72080@l77g2000hsb.googlegroups.com>
	<1174416672.629041.122320@l77g2000hsb.googlegroups.com>
	<1174417150.930765.141160@l77g2000hsb.googlegroups.com>
	<1174418741.771343.165360@n76g2000hsh.googlegroups.com>
Message-ID: <op.tpigb0qjx6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 16:25:41 -0300, <kyosohma at gmail.com> escribi?:

> Usually, the sys.path.append will allow Python to search the
> subfolders too, but I have noticed that sometimes it doesn't if you
> use UNC paths. I don't use jython, so maybe there's another way to fix
> this that is more specific to that implementation of Python?

Python does not search subfolders during a normal import. Perhaps you were  
thinking about subpackages?

-- 
Gabriel Genellina



From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Tue Mar 13 11:00:00 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Tue, 13 Mar 2007 16:00:00 +0100
Subject: glob.glob output
In-Reply-To: <1173796286.625280.147230@c51g2000cwc.googlegroups.com>
References: <1173722316.890388.67210@30g2000cwc.googlegroups.com>
	<45f5b0f7$0$9689$426a74cc@news.free.fr>
	<1173796286.625280.147230@c51g2000cwc.googlegroups.com>
Message-ID: <45f6bc64$0$23649$426a74cc@news.free.fr>

Hitesh a ?crit :
> On Mar 12, 4:33 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
>> Hitesh a ?crit :
>>
(snip)
> Thank you for your reply.
> From the return value I am trying to figure out whether the file
> xtRec* exist or not.

Yes, I had understood this !-)

What I wanted to point out was the fact you were discarding this value.

> I am newbie so exuse my ignorance... still learning.

Been here, done that... Don't worry. We're all still learning.

> Somehow when I tried your solution, it takes 10mins to scan 200 plus
> servers but when I tried my code,

Which one ? The original one, or the one where you first store glob 
results in a list ?

> it takes less then 2 mins.
> This is a puzzle for me, I gotta figure it out.

i/o are usually expansive, so the difference may comes from the repeated 
print. Also, I'm doing a bit of formatting, which is not your case.

FWIW, my own snippet was just an example of the idiomatic way to read a 
text file line by line. Doing TheRightThing(tm) for your actual problem 
is your responsability !-)


From BH at bh.com  Mon Mar 26 05:15:39 2007
From: BH at bh.com (BH)
Date: Mon, 26 Mar 2007 11:15:39 +0200
Subject: Grid and scrollbars
Message-ID: <46078f70$0$27394$ba4acef3@news.orange.fr>

Hi,

I am trying to build my own IHM with two treeCtrl and 1 grid, based on 
the wx.aui demos.
My problem is with the Grid. It dosen't have scrollbars.
I tried many methods (fit) but it always fail.

Can somebody point me where is the mistake ?

Thx

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import wx
import wx.aui
import wx.grid
import wx.html
import sys,os
import images

# stuff for debugging
print "wx.version:", wx.version()
print "pid:", os.getpid()
##raw_input("Press Enter...")

assertMode = wx.PYAPP_ASSERT_DIALOG
##assertMode = wx.PYAPP_ASSERT_EXCEPTION

text = """\
Hello World! TXT
"""

overview = """\
<html><body>
<h3>Hello World ! HTML</h3>

</body></html>
"""


class MyFrame(wx.Frame):
     def __init__(self, parent, id=-1, title='wx.aui Test',
                  size=(1024, 768), style=wx.DEFAULT_FRAME_STYLE):
         wx.Frame.__init__(self, parent, id, title, (0,0), size, style)

         self._mgr = wx.aui.AuiManager(self)

         self.data = [[1010, "The foo doesn't bar", "major", 1, 'MSW', 
1, 1, 1, 1.12],
             [1011, "I've got a wicket in my wocket", "wish list", 2, 
'other', 0, 0, 0, 1.50],
             [1012, "Rectangle() returns a triangle", "critical", 5, 
'all', 0, 0, 0, 1.56]
             ]


         self.grid = CustTableGrid(self, self.data)

         mb = wx.MenuBar()

         file_menu = wx.Menu()
         file_menu.Append(wx.ID_EXIT, "Exit")
         mb.Append(file_menu, "File")
         self.SetMenuBar(mb)

         self.statusbar = self.CreateStatusBar(2, wx.ST_SIZEGRIP)
         self.statusbar.SetStatusWidths([-2, -3])
         self.statusbar.SetStatusText("Ready", 0)
         self.statusbar.SetStatusText("Welcome To wxPython!", 1)


         tb2 = wx.ToolBar(self, -1, wx.DefaultPosition, wx.DefaultSize,
                          wx.TB_FLAT | wx.TB_NODIVIDER)
         tb2.SetToolBitmapSize(wx.Size(16,16))
         tb2_bmp1 = wx.ArtProvider_GetBitmap(wx.ART_QUESTION, 
wx.ART_OTHER, wx.Size(16, 16))
         tb2.AddLabelTool(101, "Test", tb2_bmp1)
         tb2.AddLabelTool(101, "Test", tb2_bmp1)
         tb2.AddLabelTool(101, "Test", tb2_bmp1)
         tb2.AddLabelTool(101, "Test", tb2_bmp1)
         tb2.AddSeparator()
         tb2.AddLabelTool(101, "Test", tb2_bmp1)
         tb2.AddLabelTool(101, "Test", tb2_bmp1)
         tb2.Realize()

         #Toolbar
         self._mgr.AddPane(tb2, wx.aui.AuiPaneInfo().
                           Name("tb2").Caption("Toolbar 2").
                           ToolbarPane().Top().Row(1).
                           LeftDockable(False).RightDockable(False))
         #Grid
         self._mgr.AddPane(self.grid, wx.aui.AuiPaneInfo().
                           Name("Matrice").Caption("Matrice").
 
Center().Layer(1).Position(1).CloseButton(True).MaximizeButton(True))
         #Tree Left
         self._mgr.AddPane(self.CreateTreeCtrl(), wx.aui.AuiPaneInfo().
                           Name("Q").Caption("Tree Pane").
 
Left().Layer(1).Position(1).CloseButton(True).MaximizeButton(True))
         #Tree Right
         self._mgr.AddPane(self.CreateTreeCtrl(), wx.aui.AuiPaneInfo().
                           Name("Quest").Caption("Tree Pane").
 
Right().Layer(1).Position(1).CloseButton(True).MaximizeButton(True))



         self._mgr.Update()

         self.Bind(wx.EVT_CLOSE, self.OnClose)
         self.Bind(wx.EVT_MENU, self.OnClose, id=wx.ID_EXIT)

     def CreateTreeCtrl(self):

         tree = wx.TreeCtrl(self, -1, wx.Point(0, 0), wx.Size(160, 250),
                            wx.TR_DEFAULT_STYLE | wx.NO_BORDER)


         root = tree.AddRoot("Root")
         items = []

         imglist = wx.ImageList(16, 16, True, 2)
         imglist.Add(wx.ArtProvider_GetBitmap(wx.ART_FOLDER, 
wx.ART_OTHER, wx.Size(16,16)))
         imglist.Add(wx.ArtProvider_GetBitmap(wx.ART_NORMAL_FILE, 
wx.ART_OTHER, wx.Size(16,16)))
         tree.AssignImageList(imglist)


         tree.AppendItem(root, "Root", 1)
         items.append(tree.AppendItem(root, "Item 1", 0))
         items.append(tree.AppendItem(root, "Item 2", 0))
         items.append(tree.AppendItem(root, "Item 3", 0))
         items.append(tree.AppendItem(root, "Item 4", 0))
         items.append(tree.AppendItem(root, "Item 5", 0))

         for ii in xrange(len(items)):

             id = items[ii]
             tree.AppendItem(id, "Subitem 1", 1)
             tree.AppendItem(id, "Subitem 2", 1)
             tree.AppendItem(id, "Subitem 3", 1)
             tree.AppendItem(id, "Subitem 4", 1)
             tree.AppendItem(id, "Subitem 5", 1)

         tree.Expand(root)

         return tree

     def CreateHTMLCtrl(self):
         ctrl = wx.html.HtmlWindow(self, -1, wx.DefaultPosition, 
wx.Size(400, 300))
         if "gtk2" in wx.PlatformInfo:
             ctrl.SetStandardFonts()
         ctrl.SetPage(self.GetIntroText())
         return ctrl

     def GetIntroText(self):
         return overview

     def OnClose(self, event):
         # deinitialize the frame manager
         self._mgr.UnInit()
         # delete the frame
         self.Destroy()


class CustomDataTable(wx.grid.PyGridTableBase):
     def __init__(self,data):
         self.data= data
         wx.grid.PyGridTableBase.__init__(self)
         self.colLabels = ['ID', 'Description', 'Severity', 'Priority', 
'Platform',
                           'Opened?', 'Fixed?', 'Tested?', 'TestFloat']
         self.dataTypes = [wx.grid.GRID_VALUE_NUMBER,
                           wx.grid.GRID_VALUE_STRING,
                           wx.grid.GRID_VALUE_CHOICE + ':only in a 
million years!,wish list,minor,normal,major,critical',
                           wx.grid.GRID_VALUE_NUMBER + ':1,5',
                           wx.grid.GRID_VALUE_CHOICE + ':all,MSW,GTK,other',
                           wx.grid.GRID_VALUE_BOOL,
                           wx.grid.GRID_VALUE_BOOL,
                           wx.grid.GRID_VALUE_BOOL,
                           wx.grid.GRID_VALUE_FLOAT + ':6,2',
                           ]
     def GetNumberRows(self):
         return len(self.data) + 1
     def GetNumberCols(self):
         return len(self.data[0])
     def IsEmptyCell(self, row, col):
         try:
             return not self.data[row][col]
         except IndexError:
             return True
     def GetValue(self, row, col):
         try:
             return self.data[row][col]
         except IndexError:
             return ''
     def SetValue(self, row, col, value):
         try:
             self.data[row][col] = value
         except IndexError:
             self.data.append([''] * self.GetNumberCols())
             self.SetValue(row, col, value)
             msg = wx.grid.GridTableMessage(self, 
       # The table
 
wx.grid.GRIDTABLE_NOTIFY_ROWS_APPENDED, # what we did to it
                                      1) 
# how many
             self.GetView().ProcessTableMessage(msg)
             self.GetView().MoveCursorDown(false)
     def GetColLabelValue(self, col):
         return self.colLabels[col]
     def GetTypeName(self, row, col):
         return self.dataTypes[col]
     def CanGetValueAs(self, row, col, typeName):
         colType = self.dataTypes[col].split(':')[0]
         if typeName == colType:
             return True
         else:
             return False
     def CanSetValueAs(self, row, col, typeName):
         return self.CanGetValueAs(row, col, typeName)

class CustTableGrid(wx.grid.Grid):
     def __init__(self, parent, data):
         wx.grid.Grid.__init__(self, parent, -1)
         self.table = CustomDataTable(data)
         self.SetTable(self.table, True)
         self.SetRowLabelSize(0)
         self.SetMargins(0,0)
         self.AutoSizeColumns(False)
         wx.grid.EVT_GRID_CELL_LEFT_DCLICK(self, self.OnLeftDClick)


         #return self.SetTable
     def OnLeftDClick(self, evt):
         if self.CanEnableCellControl():
             self.EnableCellEditControl()

def TestProgram():
     app = wx.App(0)

     frame = MyFrame(None)
     frame.Show()
     app.MainLoop()

if __name__ == '__main__':
     TestProgram()


From bj_666 at gmx.net  Fri Mar 30 12:39:12 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Fri, 30 Mar 2007 18:39:12 +0200
Subject: New to Python - Easy way to open a text file
References: <stSdnVv6UoPyrJDbnZ2dnUVZ_oavnZ2d@giganews.com>
	<1175270675.296617.83380@e65g2000hsc.googlegroups.com>
Message-ID: <pan.2007.03.30.16.39.12.89800@gmx.net>

In <1175270675.296617.83380 at e65g2000hsc.googlegroups.com>, kyosohma wrote:

> I'm not familiar with ezt formats, however reading a text file is a
> breeze.

This sentence doesn't match the code that follow.  It's really simpler
than that ``while`` loop.

> f = open(r'pathToFile')
> while True:
> 	line = f.readline()
> 	if not line: break
> 	# do something with the line of text such as print it.
> 
> f.close()

f = open(r'pathToFile)
for line in f:
    # do something with the line of text such as print it.
f.close()

Ciao,
	Marc 'BlackJack' Rintsch


From codecraig at gmail.com  Wed Mar 28 16:01:24 2007
From: codecraig at gmail.com (abcd)
Date: 28 Mar 2007 13:01:24 -0700
Subject: Question about extending tuple
In-Reply-To: <mailman.5721.1175111042.32031.python-list@python.org>
References: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>
	<mailman.5721.1175111042.32031.python-list@python.org>
Message-ID: <1175112084.430548.275000@b75g2000hsg.googlegroups.com>

> As an immutable type, tuple makes use of __new__.
>
> class MyTuple(tuple):
>      def __new__(cls, *args):
>          return tuple.__new__(cls, args)
>
> should work.
>
> Georg

strange.  not very consistent.



From aleax at mac.com  Mon Mar 12 00:19:05 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 11 Mar 2007 21:19:05 -0700
Subject: How to test if a key in a dictionary exists?
References: <1173561430.910888.25700@q40g2000cwq.googlegroups.com>
	<1173578899.046177.104890@j27g2000cwj.googlegroups.com>
	<7x6498le9v.fsf@ruckus.brouhaha.com>
	<1173602405.956438.140590@c51g2000cwc.googlegroups.com>
Message-ID: <1hutxsj.12uwks7mkbcqmN%aleax@mac.com>

Paul McGuire <ptmcg at austin.rr.com> wrote:

> will be.  For instance, when working with data from 0 to 100 and
> looking for frequencies by decade, you can initialize the histogram-
> dict with:
> 
> for i in range(10):
>     histodict[i] = 0

A better way, of course (also saving the histodict = {} which you didn't
mention but surely intended) would be:

    histodict = dict.fromkeys(range(10), 0)

In Python, in general, the more conceptually compact, direct, simple and
higher-abstraction approach tends to be faster as well, BTW.


Alex


From nogradi at gmail.com  Fri Mar 23 19:17:55 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Sat, 24 Mar 2007 00:17:55 +0100
Subject: On text processing
In-Reply-To: <1174690668.629592.316750@n59g2000hsh.googlegroups.com>
References: <mailman.5535.1174689003.32031.python-list@python.org>
	<1174690668.629592.316750@n59g2000hsh.googlegroups.com>
Message-ID: <5f56302b0703231617ufa96c25hd47bf2c676f7579@mail.gmail.com>

> This is my first try:
>
> ddata = {}
>
> inside_matrix = False
> for row in file("data.txt"):
>     if row.strip():
>         fields = row.split()
>         if len(fields) == 2:
>             inside_matrix = False
>             ddata[fields[0]] = [fields[1]]
>             lastkey = fields[0]
>         else:
>             if inside_matrix:
>                 ddata[lastkey][1].append(fields)
>             else:
>                 ddata[lastkey].append([fields])
>             inside_matrix = True
>
> # This gives some output for testing only:
> for k in sorted(ddata):
>     print k, ddata[k]
>
>
> Input file data.txt:
>
> key1    value1
> key2    value2
> key3    value3
>
> key4    value4
> spec11  spec12   spec13   spec14
> spec21  spec22   spec23   spec24
> spec31  spec32   spec33   spec34
>
> key5    value5
> key6    value6
>
> key7    value7
> more11   more12   more13
> more21   more22   more23
>
> key8    value8
>
>
> The output:
>
> key1 ['value1']
> key2 ['value2']
> key3 ['value3']
> key4 ['value4', [['spec11', 'spec12', 'spec13', 'spec14'], ['spec21',
> 'spec22', 'spec23', 'spec24'], ['spec31', 'spec32', 'spec33',
> 'spec34']]]
> key5 ['value5']
> key6 ['value6']
> key7 ['value7', [['more11', 'more12', 'more13'], ['more21', 'more22',
> 'more23']]]
> key8 ['value8']
>
>
> If there are many simple keys, then you can avoid creating a single
> element list for them, but then you have to tell apart the two cases
> on the base of the key (while now the presence of the second element
> is able  to tell apart the two situations). You can also use two
> different dicts to keep the two different kinds of data.
>
> Bye,
> bearophile

Thanks very much, it's indeed quite simple. I was lost in the
itertools documentation :)


From psdasilvaX at esotericaX.ptX  Sat Mar 10 20:59:39 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Sun, 11 Mar 2007 01:59:39 +0000
Subject: number generator
In-Reply-To: <7xbqj0g9z7.fsf@ruckus.brouhaha.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>
	<1173547852.666259@jubilee.claranet.pt>
	<7xbqj0g9z7.fsf@ruckus.brouhaha.com>
Message-ID: <1173578377.531469@iceman.esoterica.pt>

Paul Rubin escreveu:
> Paulo da Silva <psdasilvaX at esotericaX.ptX> writes:
>> May be this is what you want ...
>> I didn't test it enough ... but seems fine.
> 
> That's way too complicated.  Think about Gerald Flanagan's description
> of the telegraph poles, and how to implement simply.  It is a two liner.

I hadn't seen that yet. A *nice idea*. Just two lines!!!

I had a similar problem but with floats (%). I solved it using
the previous way in C. For float it is very simple. So I
adapted it for python and ints. That resulted in a lot more
complex code.


From sturlamolden at yahoo.no  Sat Mar  3 14:56:51 2007
From: sturlamolden at yahoo.no (sturlamolden)
Date: 3 Mar 2007 11:56:51 -0800
Subject: pyHook or SetWindowsHookEx
In-Reply-To: <1172858511.262384.121670@j27g2000cwj.googlegroups.com>
References: <1172584873.585035.319570@m58g2000cwm.googlegroups.com>
	<1172684780.613003.30350@z35g2000cwz.googlegroups.com>
	<1172858511.262384.121670@j27g2000cwj.googlegroups.com>
Message-ID: <1172951811.035197.249620@30g2000cwc.googlegroups.com>

On Mar 2, 7:01 pm, "abcd" <codecr... at gmail.com> wrote:
> :(

The answer depends on which GUI library you use.

E.g. if you use MFC there is an object called win32ui.PyCWnd that has
methods for hooking key strokes.



From usenet-mail-0306.20.chr0n0ss at spamgourmet.com  Thu Mar  8 17:14:47 2007
From: usenet-mail-0306.20.chr0n0ss at spamgourmet.com (Bjoern Schliessmann)
Date: Thu, 08 Mar 2007 23:14:47 +0100
Subject: pylint: don't warn about tabs
References: <SGXHh.522$mh.330@trnddc05> <55avniF23jpl2U1@mid.individual.net>
	<mailman.4813.1173388535.32031.python-list@python.org>
Message-ID: <55bg6nF21urltU1@mid.individual.net>

Ben Finney wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com>

>> IIRC it's planned in future Python versions that TABs aren't
>> supported for indentation.
> 
> I've not seen such plans, can you support that?

No ... 8)
 
> If you're thinking of this post from Guido, please note the date
> it was made:

Not this one; I thought that if there was a warning added about tabs
as whitespace recently, tabs will become forbidden in the future. 

(That is not True, obviously ;) )

Anyway, thanks for correction.

Regards,


Bj?rn

-- 
BOFH excuse #164:

root rot



From dignor.sign at gmail.com  Wed Mar 21 12:52:27 2007
From: dignor.sign at gmail.com (dsign)
Date: Wed, 21 Mar 2007 11:52:27 -0500
Subject: Making faster scientific calculations...
Message-ID: <cbbabc2d0703210952u128b62fakce840e0d8dcfdffd@mail.gmail.com>

 Ok, this is my first post to this list and don't know if it's the right
one.
I'm currently making sort of a scientific application. Most data structures
and algorithmic knots are in C++, and from there I have a set of extension
modules to Python. So, users of the app don't have to compile or ever see
C++ code to personalize the app to their ends, except for the inner
mathematical part. Regarding the last statement, I saw a few messages in
this list about Psyco, a JIT for Python and things like that. Well, I need
all the speed the machine can deliver in the mathematica l spot (I know by
profiling that it's is criticall), so, nothing of that can do the work.
Recently I read something about generating mathematical kernels in Python
for this kind of problems (can't locate the paper right now), the idea is to
just generate machine code and have it to do the work, but it wasn't for x86
based architectures (yes, portability is always a nightmare regarding tools
which generate native code). Do somebody know about a parallel effort for
x86? If there isn't such a thing out there, could it be of some interest to
people which is working numbers in Python?
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From bignose+hates-spam at benfinney.id.au  Tue Mar 27 19:35:55 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 28 Mar 2007 09:35:55 +1000
Subject: Auto execute python in USB flash disk
References: <1175014574.359563.26630@o5g2000hsb.googlegroups.com>
	<1175016073.436411.7500@b75g2000hsg.googlegroups.com>
Message-ID: <87vegmmf8k.fsf@benfinney.id.au>

"Ene" <EneUran at yahoo.com> writes:

> Install the free PortablePython from http://www.portablepython.com/
> on your USB flash drive, and go from there.

To be clear: In addition to being a zero-cost download, Portable
Python is free software:

    Python? distribution included in Portable Python is licensed under
    PSF License, SciTE is licensed under SciTE license and Portable
    Python scripts are licensed under GPL license.

    <URL:http://www.portablepython.com/site/download/>

-- 
 \     "I know when I'm going to die, because my birth certificate has |
  `\                            an expiration date."  -- Steven Wright |
_o__)                                                                  |
Ben Finney



From balaraju1 at yahoo.com  Wed Mar 21 08:20:57 2007
From: balaraju1 at yahoo.com (gaddam bala)
Date: Wed, 21 Mar 2007 05:20:57 -0700 (PDT)
Subject: scipy installations
Message-ID: <84839.9124.qm@web56409.mail.re3.yahoo.com>

Hi all,
I was trying to install (Scientific Python) scipy 0.3.2 in LINUX 3, but I am facing some problem.Please help me in resolving this issue.
here are the steps that i have followed :

Installed pre-requisites for scipy installations:
1. Python-2.4.1
 $./configure
 $make
 $make install
2. ATLAS
 $./configure
 $make
 $make install arch=Linux_P4ESSE3
3. Numerical Python-24.0b2
 $python setup.py install
4.F2PY-2.45.241_1926 (Fortran to Python interface generator)
     Prerequisite:
     (i). NumPy_ -1.0
       $python setup.py install
5. C, C++, Fortran 77 compilers - gcc 3.4.6 
  $./configure
  $make
  $make install

SciPy_complete-0.3.2
 $python setup.py install
all the 5 installations were succesfull but could not install scipy successfully. 
Following error message is shown
"error: Command "gcc -shared build/temp.linux-x86_64-2.2/gistCmodule.o build/temp
.linux-x86_64-2.2/gist.o build/temp.linux-x86_64-2.2/tick.o build/temp.linux-x86
_64-2.2/tick60.o build/temp.linux-x86_64-2.2/engine.o build/temp.linux-x86_64-2.
2/gtext.o build/temp.linux-x86_64-2.2/draw.o build/temp.linux-x86_64-2.2/draw0.o
 build/temp.linux-x86_64-2.2/clip.o build/temp.linux-x86_64-2.2/gread.o build/te
mp.linux-x86_64-2.2/gcntr.o build/temp.linux-x86_64-2.2/hlevel.o build/temp.linu
x-x86_64-2.2/ps.o build/temp.linux-x86_64-2.2/cgm.o build/temp.linux-x86_64-2.2/
eps.o build/temp.linux-x86_64-2.2/style.o build/temp.linux-x86_64-2.2/xfancy.o b
uild/temp.linux-x86_64-2.2/xbasic.o build/temp.linux-x86_64-2.2/dir.o build/temp
.linux-x86_64-2.2/files.o build/temp.linux-x86_64-2.2/fpuset.o build/temp.linux-
x86_64-2.2/pathnm.o build/temp.linux-x86_64-2.2/timew.o build/temp.linux-x86_64-
2.2/uevent.o build/temp.linux-x86_64-2.2/ugetc.o build/temp.linux-x86_64-2.2/uma
in.o build/temp.linux-x86_64-2.2/usernm.o build/temp.linux-x86_64-2.2/slinks.o b
uild/temp.linux-x86_64-2.2/colors.o build/temp.linux-x86_64-2.2/connect.o build/
temp.linux-x86_64-2.2/cursors.o build/temp.linux-x86_64-2.2/errors.o build/temp.
linux-x86_64-2.2/events.o build/temp.linux-x86_64-2.2/fills.o build/temp.linux-x
86_64-2.2/fonts.o build/temp.linux-x86_64-2.2/images.o build/temp.linux-x86_64-2
.2/lines.o build/temp.linux-x86_64-2.2/pals.o build/temp.linux-x86_64-2.2/pwin.o
 build/temp.linux-x86_64-2.2/resource.o build/temp.linux-x86_64-2.2/rgbread.o bu
ild/temp.linux-x86_64-2.2/textout.o build/temp.linux-x86_64-2.2/rect.o build/tem
p.linux-x86_64-2.2/clips.o build/temp.linux-x86_64-2.2/points.o build/temp.linux
-x86_64-2.2/hash.o build/temp.linux-x86_64-2.2/hash0.o build/temp.linux-x86_64-2
.2/mm.o build/temp.linux-x86_64-2.2/alarms.o build/temp.linux-x86_64-2.2/pstrcpy
.o build/temp.linux-x86_64-2.2/pstrncat.o build/temp.linux-x86_64-2.2/p595.o bui
ld/temp.linux-x86_64-2.2/bitrev.o build/temp.linux-x86_64-2.2/bitlrot.o build/te
mp.linux-x86_64-2.2/bitmrot.o -LLib/xplt/. -LLib/xplt/src -L/usr/X11R6/lib -L/us
r/lib -L/usr/X11R6/lib -Lbuild/temp.linux-x86_64-2.2 - -lm -o build/lib.linu
x-x86_64-2.2/scipy/xplt/gistC.so" failed with exit status 1"

Thanks in advance

Regards
Balaraju


 
____________________________________________________________________________________
Sucker-punch spam with award-winning protection. 
Try the free Yahoo! Mail Beta.
http://advision.webevents.yahoo.com/mailbeta/features_spam.html


From deets at nospam.web.de  Tue Mar 27 11:18:03 2007
From: deets at nospam.web.de (Diez B. Roggisch)
Date: Tue, 27 Mar 2007 17:18:03 +0200
Subject: pattern search
References: <mailman.5671.1175008459.32031.python-list@python.org>
Message-ID: <56sqtbF29auttU2@mid.uni-berlin.de>

Fabian Braennstroem wrote:

> Hi,
> 
> I wrote a small gtk file manager, which works pretty well. Until
> now, I am able to select different file (treeview entries) just by
> extension (done with 'endswith'). See the little part below:
> 
>                 self.pathlist1=[ ]
>                 self.patternlist=[ ]
>                 while iter:
> #                print iter
>                     value = model.get_value(iter, 1)
> #                if value is what I'm looking for:
>                     if value.endswith("."+ pattern):
>                         selection.select_iter(iter)
>                         selection.select_path(n)
>                         self.pathlist1.append(n)
>                         self.patternlist.append(value)
>                     iter = model.iter_next(iter)
> #                print value
>                     n=n+1
> 
> Now, I would like to improve it by searching for different 'real'
> patterns just like using 'ls' in bash. E.g. the entry
> 'car*.pdf' should select all pdf files with a beginning 'car'.
> Does anyone have an idea, how to do it?

Use regular expressions. They are part of the module "re". And if you use
them, ditch your code above, and make it just search for a pattern all the
time. Because the above is just the case of

*.ext



Diez


From israphelr at googlemail.com  Fri Mar  9 16:25:20 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 9 Mar 2007 13:25:20 -0800
Subject: Need help with a string plz! (newbie)
Message-ID: <1173475520.292989.239200@p10g2000cwp.googlegroups.com>

Hi all

So I created a program, that gets a string from a user and then prints
the string in reverse order.

Now, here's the code;

#################################
print "\nWelcome !"
print "\nEnter a word, and the world will be reversed!"

word = raw_input("\nPlease Enter a word: ")

end = len(word)
end -= 1

for position in range(end, -1, -1):
   print word[position],

raw_input("\nPress Enter to Exit")

################################

What actually happens is, the next character is printed on the same
line but, there is a space inbetween each character.

I thought maybe I could create another variable and then assign each
character into the new string by concatenating, makign a new string
each time, but I find this a bit muddling at the moment. Any help'd be
great. Thanks.



From gerald607 at gmail.com  Fri Mar 16 07:41:38 2007
From: gerald607 at gmail.com (Gerald)
Date: 16 Mar 2007 04:41:38 -0700
Subject: Mastering Python
Message-ID: <1174045298.826137.262890@o5g2000hsb.googlegroups.com>

Hi ,Im a BSc4 Maths/Computer Science student.Unfortunately my
curriculum did not include Python programming yet I see many vacancies
for Python developers.I studied programming Pascal,C++ and Delphi.So I
need to catch up quickly and master Python programming.How do you
suggest that I achieve this goal?Is python platform independent?What
is the best way?And how long would it take before I can develop
applications using python?Can you recommend websites that feature a
gentle introduction to Python?



From maxerickson at gmail.com  Sun Mar  4 19:16:11 2007
From: maxerickson at gmail.com (Max Erickson)
Date: Mon, 5 Mar 2007 00:16:11 +0000 (UTC)
Subject: Alternatives for Extracting EXIF and JPEG Data from Images
References: <45EB3404.3030401@cox.net>
Message-ID: <Xns98E9C40172DB2maxericksongmailcom@80.91.229.5>

Roger <crosseyedpenguin at cox.net> wrote:

> Does anybody have a pointer to a Python library/utility that will
> extract the chrominance and luminance quantization tables from
> JPG images? 
> 
> I have been using the _getexif method from PIL, which works fine,
> but doesn't extract the quantization data.  I am a bit fuzzy on
> the terminology, but the quantization data  seems to be JPEG data
> rather than EXIF data.  One utility that extracts the
> quantization tables is JPEGsnoop -- there is a link to download
> the utility here: 
>    http://www.impulseadventure.com/photo/jpeg-quantization.html
> 
> The source code for the above isn't available and may not be
> callable from a Python script even  if it were available.
> 
> Roger
> 

I don't know what the format is, etc, but jpegs I open with PIL have a 
quantization attribute, e.g:

>>> im.quantization
{0: array('b', [6, 4, 4, 5, 4, 4, 6, 5, 5, 5, 6, 6, 6, 7, 9, 14, 9, 9, 
8, 8, 9, 18, 13, 13, 10, 14, 21, 18, 22, 22, 21, 18, 20, 20, 23, 26, 
33, 28, 
<snip a bunch more numbers>


max



From rdm at rcblue.com  Tue Mar 13 20:53:41 2007
From: rdm at rcblue.com (Dick Moores)
Date: Tue, 13 Mar 2007 17:53:41 -0700
Subject: number generator
Message-ID: <20070314005343.BB4EC1E4008@bag.python.org>

At 05:47 PM 3/10/2007, Paul Rubin wrote:

>The fencepost method still seems to be simplest:
>
>     t = sorted(random.sample(xrange(1,50), 4))
>     print [(j-i) for i,j in zip([0]+t, t+[50])]

=================================
M = 50
N = 4
def sumRndIntRubin(M, N):
     import random
     t = sorted(random.sample(xrange(1,M), N-1))
     lst = [(j-i) for i,j in zip([0]+t, t+[M])]

     print t
     print t + [M]
     print [0] + t
     print lst
     print sum(lst)

sumRndIntRubin(M, N)
====================================
[6, 20, 31]
[6, 20, 31, 50]
[0, 6, 20, 31]
[6, 14, 11, 19]
50

I understand what zip() and random.sample() are doing, and the above 
helps me get inside the fencepost method, but I don't understand WHY 
it works, or how in the world anyone could have devised it. It is 
truly magical to me!

BTW I did see this in this thread, "Suppose you have a fixed 
telegraph pole at N and a fixed telegraph pole at M, and you're given 
5 more telegraph poles..." (Gerard Flanagan), but even now I can't 
take it anywhere. I guess I'm just a dim bulb. (I thought I was a 
fairly smart guy until I took up Python.)

Dick Moores



From sri1025 at gmail.com  Thu Mar 22 09:21:55 2007
From: sri1025 at gmail.com (Srikanth)
Date: 22 Mar 2007 06:21:55 -0700
Subject: Removing a particular index from a list
In-Reply-To: <ettveb$vti$01$1@news.t-online.com>
References: <1174568401.369232.106990@b75g2000hsg.googlegroups.com>
	<ettveb$vti$01$1@news.t-online.com>
Message-ID: <1174569715.386626.206790@l75g2000hse.googlegroups.com>

Thanks Steve, Cyril and Peter.

>
> This, or not reading the tutorial.
>
> http://docs.python.org/tut/node7.html#SECTION007200000000000000000
>
> Peter

I read this 2 months ago and I expected it to be a method of list, but
I sound like I am making an excuse. Thanks a lot.

Regards,
Srikanth



From gagsl-py2 at yahoo.com.ar  Wed Mar  7 11:23:18 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 13:23:18 -0300
Subject: Generator expression parenthesis mixed with function call ones
References: <esmn5q$5ni$1@news2.u-psud.fr>
Message-ID: <op.totug4ylx6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Wed, 07 Mar 2007 12:53:43 -0300, Laurent Pointal  
<laurent.pointal at limsi.fr> escribi?:

>>>> f(4,i for i in range(10))
>   File "<stdin>", line 1
> SyntaxError: invalid syntax

2.5 has a better error message:
py> f(4,i for i in range(10))
   File "<stdin>", line 1
SyntaxError: Generator expression must be parenthesized if not sole  
argument

> Why does Python allow generator expression parenthesis to be mixed with
> function call parenthesis when there is only one parameter ?

Because they are redundant when only one argument is used.
sum(i for i in range(10)) looks better than sum((i for i in range(10)))
"Beautiful is better than ugly", and "Readability counts."

> IMHO this should be forbidden, usage must not be different when there is
> only one parameter and when there are more parameters.

It's similar to "%d" % 123 vs. "%d" % (123,)
"""Special cases aren't special enough to break the rules.
Although practicality beats purity."""

> User should all times explicitly use () for a generator expression and
> [] for a list comprehension expression.

For a list comprehension, yes. For a generator, not always.

-- 
Gabriel Genellina



From wescpy at gmail.com  Fri Mar  9 02:57:37 2007
From: wescpy at gmail.com (wesley chun)
Date: 8 Mar 2007 23:57:37 -0800
Subject: Python books?
In-Reply-To: <mailman.4836.1173410475.32031.python-list@python.org>
References: <mailman.4836.1173410475.32031.python-list@python.org>
Message-ID: <1173427057.176019.171130@n33g2000cwc.googlegroups.com>

On Mar 8, 7:06 pm, Tommy Nordgren <tommy.nordg... at comhem.se> wrote:
> Could some kind soul please recommend a few textbooks on Python 2.5
> and it's class library?


it's not necessary to have a 2.5 book that can introduce you to the
modules of the Python Standard Library (not all modules are [or have]
classes so "class library" perhaps is too restrictive a term).

the most significant additions to the std library in 2.5 are:
ctypes, sqlite3, xml.etree (ElementTree), wsgiref, cProfile

altho they provide new functionality, there are plenty of existing
modules in the standard library that are worth learning.  the main
reference guides to the standard library modules and their attributes
include: Python in a Nutshell and Python Essential Reference, both in
addition to the online library reference.

my book, Core Python Programming, is revised to 2.5, but focuses on
teaching you the core part of the language, features, objects, memory
management, development, good practices, some advanced topic coverage,
and presents lots of exercises.  however, it is not an exhaustive
guide to the standard library.  to find out more about it, check out
the reviews and notes on amazon as well as the book's website (see
below).

hope this helps!
-- wesley
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com



From kaushik.ghose at gmail.com  Fri Mar  9 20:41:56 2007
From: kaushik.ghose at gmail.com (kghose)
Date: 9 Mar 2007 17:41:56 -0800
Subject: Unexpected behavior of list of list
In-Reply-To: <1173490209.398081.200420@h3g2000cwc.googlegroups.com>
References: <1173490209.398081.200420@h3g2000cwc.googlegroups.com>
Message-ID: <1173490916.084323.207890@q40g2000cwq.googlegroups.com>

On Mar 9, 8:30 pm, "kghose" <kaushik.gh... at gmail.com> wrote:
> Hi,
>
> The following code
>
> listoflists = [[]]*2
> listoflists[0].append(1)
>
> appends(1) to both listoflists[0] and listoflists[1] (which I did not
> expect)
>
> while
>
> listoflists = [[]]*2
> listoflists[0] = [1]
> listoflists[0].append(2)
>
> works as expected.i.e. only listoflists[0] gets 2 appended to it and
> any further operations work as expected.
>
> I can't figure out why. Any help with explaining this would be much
> appreciated
>
> thanks!
> -Kaushik

OK, I looked at the previous few threads and I think I understand why.
I refered to this page http://www.python.org/doc/faq/programming/#how-do-i-create-a-multidimensional-list

thanks
-kaushik



From xavier.martinezhidalgo at gmail.com  Fri Mar 16 13:40:30 2007
From: xavier.martinezhidalgo at gmail.com (xavim)
Date: 16 Mar 2007 10:40:30 -0700
Subject: Python training in Barcelona, Spain?
Message-ID: <1174066830.756671.204450@n76g2000hsh.googlegroups.com>

Hi!

I work for a company located in Barcelona, Spain, and we are
looking for an on-site introductory Python training.  The
audience would consist of about 10 developers with Java
background.  The training should be taught in Spanish.

Does anyone knows of a company or individual that could
deliver such training?

Thanks!
Xavi



From sjdevnull at yahoo.com  Wed Mar 14 16:06:09 2007
From: sjdevnull at yahoo.com (sjdevnull at yahoo.com)
Date: 14 Mar 2007 13:06:09 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <pan.2007.03.14.15.57.44.398564@gmx.net>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<mailman.5076.1173876678.32031.python-list@python.org>
	<et8u0e$k2a$1@news2.u-psud.fr>
	<pan.2007.03.14.15.57.44.398564@gmx.net>
Message-ID: <1173902769.121303.62090@e1g2000hsg.googlegroups.com>

On Mar 14, 10:57 am, Marc 'BlackJack' Rintsch <bj_... at gmx.net> wrote:
> In <et8u0e$k2... at news2.u-psud.fr>, Laurent Pointal wrote:
>
> > Steve Holden a ?crit :
> >> Regular expressions aren't really needed here. Untested code follows:
>
> >> for line in open('/proc/meminfo').readlines:
> > for line in open('/proc/meminfo').readlines():
>
> for line in open('/proc/meminfo'):

Yeah, that's nicer.

> Of course it's cleaner to assign the file object to a name and close the
> file explicitly after the loop.

For certain definitions of "cleaner" (insert old argument about how
ref-counting semantics or at least immediate gc of locally scoped
variables when leaving scope _should be_ (not _are_) language-
guaranteed because it makes for cleaner, more programmer-friendly code
and often avoids ugly hacks like assigning a spurious name and/or
using "with" constructs).

But if you're going to do that, "with" is the better option IMO:

from __future__ import with_statement
...
with open('/proc/meminfo') as infile:
  for line in infile:

Of course, that alternative requires Python 2.5



From g.brandl at gmx.net  Mon Mar 12 05:41:44 2007
From: g.brandl at gmx.net (Georg Brandl)
Date: Mon, 12 Mar 2007 10:41:44 +0100
Subject: Weekly Python Patch/Bug Summary
In-Reply-To: <200703120027.l2C0RpKe005438@bayview.thirdcreek.com>
References: <200703120027.l2C0RpKe005438@bayview.thirdcreek.com>
Message-ID: <et378o$bus$1@sea.gmane.org>

Kurt B. Kaiser schrieb:
> Patch / Bug Summary
> ___________________
> 
> Patches :  380 open (-36) /  3658 closed (+65) /  4038 total (+29)

We should really try to keep the numbers in this magnitude :)

Georg



From bbxx789_05ss at yahoo.com  Sat Mar 24 14:00:15 2007
From: bbxx789_05ss at yahoo.com (7stud)
Date: 24 Mar 2007 11:00:15 -0700
Subject: Removing Python 2.4.4 on OSX
In-Reply-To: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
References: <1174757428.482067.137590@n76g2000hsh.googlegroups.com>
Message-ID: <1174759215.171158.106330@n59g2000hsh.googlegroups.com>

Robert Hicks wrote:
>... but I don't see any unistall instructions
> anywhere.
>

Did 2.4.4 come pre-installed?



From http  Thu Mar 22 05:17:09 2007
From: http (Paul Rubin)
Date: 22 Mar 2007 01:17:09 -0800
Subject: How to use unix_md5_crypt from Perl in Python?
References: <mailman.5445.1174554075.32031.python-list@python.org>
Message-ID: <7xbqilvdre.fsf@ruckus.brouhaha.com>

Nico Grubert <nicogrubert at gmail.com> writes:
> Example:
>    username = 'root at localhost'
>    password = 'root'
> 
> The crypted password is: 'roK20XGbWEsSM'

that looks like you want crypt(3), not md5.  See:

   http://docs.python.org/lib/module-crypt.html

Sample session:

    >>> import crypt
    >>> print crypt.crypt('root','ro')
    roK20XGbWEsSM
    >>> 


From aleax at mac.com  Thu Mar 22 00:56:12 2007
From: aleax at mac.com (Alex Martelli)
Date: Wed, 21 Mar 2007 21:56:12 -0700
Subject: When is List Comprehension inappropriate?
References: <1174315319.860848.289890@p15g2000hsd.googlegroups.com>
	<1174461824.150667.295820@y66g2000hsf.googlegroups.com>
Message-ID: <1hvci8l.1g8v6n1qj68nnN%aleax@mac.com>

Paddy <paddy3118 at googlemail.com> wrote:
   ...
> I have found that I have gone too far when I used listcomps for their
> sideeffects rather than wanting the list produced, for example the

I agree.

> second listcomp below is an expression as statement I don't want the
> list produced - just the effect on data.
> 
> >>> # some random ranges
> >>> data = [range(random.randrange(3,7)) for x in range(4)]
> >>> # but I want each range jumbled
> >>> [ random.shuffle(d) for d in data]
> [None, None, None, None]
> >>> data
> [[2, 0, 3, 1], [0, 2, 1], [3, 4, 1, 0, 2], [2, 1, 0, 3]]
> >>>
> 
> (I do know how to re-write it).

for d in data: random.shuffle(d)


Alex


From lobais at gmail.com  Fri Mar  2 14:29:24 2007
From: lobais at gmail.com (Thomas Dybdahl Ahle)
Date: Fri, 02 Mar 2007 20:29:24 +0100
Subject: Sort with extra variables
Message-ID: <pan.2007.03.02.19.29.39@gmail.com>

I have a sort function in a python chess program.
Currently it looks like this:

def sortMoves (board, table, ply, moves):
    f = lambda move: getMoveValue (board, table, ply, move)
    moves.sort(key=f, reverse=True)
    return moves

However I'd really like not to use the lambda, as it slows down the code.

I've thought about saving the extra variables in the global space, but it 
really feals ugly.

Do you have any ideas how I can sort these moves the fastest?


From sickcodemonkey at gmail.com  Sat Mar 10 15:51:24 2007
From: sickcodemonkey at gmail.com (Sick Monkey)
Date: Sat, 10 Mar 2007 15:51:24 -0500
Subject: making an "executable" for a python code (newbie)
In-Reply-To: <80628d680703100654x209e954cmf67a03f853c2c7ae@mail.gmail.com>
References: <80628d680703100654x209e954cmf67a03f853c2c7ae@mail.gmail.com>
Message-ID: <2adc542f0703101251o157f06ear45f89879f0017820@mail.gmail.com>

You will probably want to read this documentation:
http://pyinstaller.hpcf.upr.edu/docs/Manual_v1.1.html

Look carefully at the following sections on the documentation:
"Building the runtime environment" and "Spec File" and "Spec File -> EXE"



<http://pyinstaller.hpcf.upr.edu/docs/Manual_v1.1.html#id4>On 3/10/07,
Pradnyesh
Sawant <spradml at gmail.com> wrote:
>
> hello,
> i have some python scripts (especially, PyQt4 scripts) that i want to
> deploy on both linux and windows m/c's. different packaging tools that
> i checked (cx_freeze, distutils, pyinstaller) allow me to create
> "installers". however, i'm interested in creating "executables" that
> allow the code to be run just on "double clicking". is there any way
> to get this done?
> also, it seems that "pyexe" creates a windows executable, but how do i
> use it on linux?
>
> thanks for all the help!
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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From codecraig at gmail.com  Wed Mar 28 15:32:20 2007
From: codecraig at gmail.com (abcd)
Date: 28 Mar 2007 12:32:20 -0700
Subject: Question about extending tuple
Message-ID: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>

I wanted to extend tuple but ran into a problem.  Here is what I
thought would work

class MyTuple(tuple):
    def __init__(self, *args):
        tuple.__init__(self, args)

x = MyTuple(1,2,3,4)

That gives me...

TypeError: tuple() takes at most 1 argument (4 given).

However, this call works:

x = MyTuple((1,2,3,4))

I am perplexed only because "args" is a tuple by the definition of
*args.  Anyone?



From cedb816 at yahoo.com  Sun Mar 11 07:12:02 2007
From: cedb816 at yahoo.com (ce)
Date: 11 Mar 2007 04:12:02 -0700
Subject: Python in a desktop environment
In-Reply-To: <1173605193.585675.217210@30g2000cwc.googlegroups.com>
References: <1173583424.092914.148080@h3g2000cwc.googlegroups.com>
	<1173595945.530722.273030@30g2000cwc.googlegroups.com>
	<1173605193.585675.217210@30g2000cwc.googlegroups.com>
Message-ID: <1173611522.067893.261110@q40g2000cwq.googlegroups.com>

On Mar 11, 12:26 pm, "David Cramer" <dcra... at gmail.com> wrote:
> On Mar 10, 10:52 pm, "sjdevn... at yahoo.com" <sjdevn... at yahoo.com>
> wrote:
>
> > David Cramer wrote:
> > > If you had an application that you were about to begin development on
> > > which you wanted to be cross platform (at least Mac and Windows),
> > > would you suggest using c++ and Python?
>
> > I'd strongly consider a pure python solution (I'd choose wxpython),
> > but if I needed to code backend stuff in a lower level language I'd
> > use C rather than C++.
>
> Well we want it to be very robust, and python isn't exactly the
> fastest language, or one with the lowest overhead :)

only one word caught my attention "robust".. do u mean python is not
robust???
if this is your feeling, i don't recommend u to "reconsider" anymore,
turn back to ur previous programming language (what did'ya say it
was??? c# .. i remember one ad. about it's robustness .. a piece of
jelly!)

and by the way if u know something about C++, code the GUI with QT
(which would make it portable), and enjoy a high speed execution :P



From theller at ctypes.org  Sat Mar 24 08:13:48 2007
From: theller at ctypes.org (Thomas Heller)
Date: Sat, 24 Mar 2007 13:13:48 +0100
Subject: Create new processes over telnet in XP
In-Reply-To: <46045acb$0$326$e4fe514c@news.xs4all.nl>
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>	<46043ad8$0$27402$ba4acef3@news.orange.fr>	<mailman.5531.1174684678.32031.python-list@python.org>
	<46045acb$0$326$e4fe514c@news.xs4all.nl>
Message-ID: <eu34lq$am4$1@sea.gmane.org>

Irmen de Jong schrieb:
> Shane Geiger wrote:
>> This reminds me of something I once wanted to do:  How can I install 
>> Python in a totally non-gui way on Windows (without the use of VNC)?  I 
>> think I was telnetted into a computer (or something like that) and I was 
>> unable to run the usual Python installer because it uses a GUI.
> 
> Python uses a MSI (microsoft installer) based installer on windows.
> This was introduced in version 2.5 I believe.
> 
> For MSI installers there's the standard MSI-way to perform a "silent" install.
> Google for it, I don't know what the command line switch(es) are, but they're there.
> 
> --Irmen
> 
Even the Wise installer that was used to build the 2.3 and earlier versions
had command line switches to do silent installs.

THomas



From infobiz_123 at yahoo.com  Wed Mar 21 01:47:38 2007
From: infobiz_123 at yahoo.com (infobiz_123 at yahoo.com)
Date: 20 Mar 2007 22:47:38 -0700
Subject: Looking For Programming Job?
Message-ID: <1174456058.622955.29140@b75g2000hsg.googlegroups.com>

Simply Find Your Programming Job Vacancy and resources here -->
http://www.jobbankdata.com/job-programming.htm



From mailmaverick666 at gmail.com  Fri Mar  9 02:35:22 2007
From: mailmaverick666 at gmail.com (rishi pathak)
Date: Fri, 9 Mar 2007 13:05:22 +0530
Subject: Python books?
In-Reply-To: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
References: <1CD93DF7-4172-4FF1-B5B4-BF665762C9E7@comhem.se>
Message-ID: <180b672e0703082335mbb20e6fp386394407cfe67c8@mail.gmail.com>

I would suggest you the python docs available on python.org.They are the
best and latest

On 3/9/07, Tommy Nordgren <tommy.nordgren at comhem.se> wrote:
>
> Could some kind soul please recommend a few text books on Python 2.5
> and it's class library?
>
> ----
> Kine dies, Kinfolk dies, and thus at last yourself
> This I know that never dies, how a dead mans deeds are deemed. --
> Elder edda
> Tommy Nordgren
> tommy.nordgren at comhem.se
>
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>



-- 
Regards--
Rishi Pathak
National PARAM Supercomputing Facility
Center for Development of Advanced Computing(C-DAC)
Pune University Campus,Ganesh Khind Road
Pune-Maharastra
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From kyosohma at gmail.com  Fri Mar 23 16:29:26 2007
From: kyosohma at gmail.com (kyosohma at gmail.com)
Date: 23 Mar 2007 13:29:26 -0700
Subject: Using Python to start SNMP service on remote XP hosts...
In-Reply-To: <1174679512.935147.231630@n59g2000hsh.googlegroups.com>
References: <1174679512.935147.231630@n59g2000hsh.googlegroups.com>
Message-ID: <1174681766.222475.123870@l77g2000hsb.googlegroups.com>

On Mar 23, 2:51 pm, "KDawg44" <KDaw... at gmail.com> wrote:
> Hi,
>
> I am very new to Python and really just began studying and using it.
> I read that it was relatively easy to interact with Windows machines
> with Python and I am desperately looking for something to replace
> VBScript (not a big fan).
>
> I am currently deploying a Gentoo Linux SNMP server running Cacti in
> my network and would like my XP machines to report traps to this box.
> The SNMP service is not running by default on the machines in the
> network and instead of going to each one at a time, I thought I could
> write a script.
>
> Does anyone have any suggestions about how I go about accomplishing
> this?
>
> Thanks so much for any suggestions.

It looks like you can use Tim Golden's WMI module to do what you need.
See this other post for info:
http://www.thescripts.com/forum/thread541366.html

You'll have to find out the exact name of the service, loop through
and use an IF to test for it and when it is found, try starting it.

Mike



From skip at pobox.com  Wed Mar 28 08:48:31 2007
From: skip at pobox.com (skip at pobox.com)
Date: Wed, 28 Mar 2007 07:48:31 -0500
Subject: socket read timeout
In-Reply-To: <MukOh.12989$Ng1.10639@newsfe19.lga>
References: <U39Oh.178798$BK1.144837@newsfe13.lga>
	<eub6un$k3d$3@nemesis.news.tpi.pl>
	<mailman.5668.1175003334.32031.python-list@python.org>
	<VegOh.15507$nh4.13055@newsfe20.lga>
	<mailman.5688.1175034299.32031.python-list@python.org>
	<MukOh.12989$Ng1.10639@newsfe19.lga>
Message-ID: <17930.25631.86693.827473@montanaro.dyndns.org>


    hg> My issue with that is the effect on write: I only want a timeout on
    hg> read ...  but anyway ...

So set a long timeout when you want to write and short timeout when you want
to read.

Skip


From gert.cuykens at gmail.com  Fri Mar  2 00:12:45 2007
From: gert.cuykens at gmail.com (gert)
Date: 1 Mar 2007 21:12:45 -0800
Subject: urlDecode()
In-Reply-To: <mailman.4570.1172752971.32031.python-list@python.org>
References: <1172706706.152350.56390@z35g2000cwz.googlegroups.com>
	<1172713540.467763.98810@t69g2000cwt.googlegroups.com>
	<mailman.4570.1172752971.32031.python-list@python.org>
Message-ID: <1172812365.346700.102790@j27g2000cwj.googlegroups.com>

On Mar 1, 1:40 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar> wrote:
> En Wed, 28 Feb 2007 22:45:40 -0300, gert <gert.cuyk... at gmail.com> escribi?:
>
> > import re
>
> > def htc(m):
> >     return chr(int(m.group(1),16))
>
> > def urldecode(url):
> >     rex=re.compile('%([0-9a-hA-H][0-9a-hA-H])',re.M)
> >     return rex.sub(htc,url)
>
> > if  __name__ == '__main__':
> >     print urldecode('adasasdasd%20asdasdasdas')
>
> > Ok thats it enough googeling around i make one my self :)
>
> You reinvented urllib.unquote
>

lol ok i am not going to argue about why they call it unquote




From nagle at animats.com  Sat Mar 17 13:51:04 2007
From: nagle at animats.com (John Nagle)
Date: Sat, 17 Mar 2007 17:51:04 GMT
Subject: SQLite3, data not found
In-Reply-To: <mailman.5226.1174143760.32031.python-list@python.org>
References: <200703161755.58549.inq1ltd@verizon.net>	<16651e80703161523m12462f6s554593551b164444@mail.gmail.com>
	<mailman.5226.1174143760.32031.python-list@python.org>
Message-ID: <cUVKh.8139$yW.7117@newssvr11.news.prodigy.net>

jim-on-linux wrote:
> On Friday 16 March 2007 18:23, Jerry Hill wrote:
> 
>>On 3/16/07, jim-on-linux <inq1ltd at verizon.net> 
> 
> wrote:
> 
>>>Below, the first select produces results but,
>>>after closing then re-opening the database
>>>the select produces an empty list.  Anyone
>>>know the reason ??
>>
>>When you first open a connection, you
>>implicitly begin a transaction. You need to
>>call con.commit() before you close the
>>connection, or your transaction will be rolled
>>back when you close() it.  If don't want to
>>bother with transaction handling, you can turn
>>it off when you open the connection, like this:
>>con = sqlite3.connect('myData',
>>isolation_level=None)
>>
>>See the Python Database API 2.0 PEP for more
>>details about the behavior required of DB-API
>>2.0 compliant interfaces:
>>http://www.python.org/dev/peps/pep-0249/
>>
>>--
>>Jerry
> 
> 
> Thanks, this saves a lot of con.commit action.
> And the website is valuable.
> 
> jim-on-linux 

    Don't turn off atomic transactions, use them.
Otherwise, two copies of your program running at the
same time will probably not do what you want.
Just call "commit" at the end of each transaction.

			John Nagle


From psdasilvaX at esotericaX.ptX  Fri Mar 16 16:17:22 2007
From: psdasilvaX at esotericaX.ptX (Paulo da Silva)
Date: Fri, 16 Mar 2007 20:17:22 +0000
Subject: Returning other instance from __init__
In-Reply-To: <1173970438.864747@jubilee.claranet.pt>
References: <1173933158.948806@jubilee.claranet.pt>
	<1huzkla.i6dshw1grnysmN%aleax@mac.com>
	<1173970438.864747@jubilee.claranet.pt>
Message-ID: <1174076229.671240@jubilee.claranet.pt>

Paulo da Silva escreveu:
> Alex Martelli escreveu:
>> Paulo da Silva <psdasilvaX at esotericaX.ptX> wrote:
> ....
> 
>> E.g.:
>>
>> class C1(object):
>>     def __new__(cls, xxx):
>>         if xxx: return type.__new__(cls, xxx)
>>         else: return C1.load(xxx)
>>     @staticmethod
>>      def load(xxx): return ...whatever...
>>      def __init__(self, xxx):
>>          if hasattr(self, 'foo'): return
>>          self.foo = 'foo'
>>          self.bar = 'bar'
>>
> 
> 
> Just for a better understanding ...
> Can I do this?
> 
> class C1(object):
>     def __new__(cls, xxx):
>         if xxx:
> 		cls.foo='foo'
> 		cls.bar='bar'
> 		return type.__new__(cls, xxx)
This does not work(!) at least for python 2.4.3.

>         else:
> 		return C1.load(xxx)
>     @staticmethod
>     def load(xxx): return ...whatever...
>     # OMMIT THE __init__
>     # or
>     def __init__(self, xxx):
>         pass

I needed return cls and put the __init__ stuff here.
Is this the best practice?

Thanks.


From henriklied at gmail.com  Tue Mar 13 06:06:41 2007
From: henriklied at gmail.com (Henrik Lied)
Date: Tue, 13 Mar 2007 11:06:41 +0100
Subject: Starting an external, independent process from a script
In-Reply-To: <180b672e0703130257w281a182kc722ad2b705c68f2@mail.gmail.com>
References: <1173741230.908314.23080@c51g2000cwc.googlegroups.com>
	<180b672e0703130257w281a182kc722ad2b705c68f2@mail.gmail.com>
Message-ID: <bcc690f00703130306q9577a1eu867fd1199312b9a2@mail.gmail.com>

Unfortunately, that didn't work either.
The output is empty, I don't get a message, and I definitely don't get a
converted file.

2007/3/13, rishi pathak <mailmaverick666 at gmail.com>:
>
> You can do something like this:
> pid = os.fork()
> if pid != 0:
>     os.execl("mencoder variables here and its arguments")
> else:
>     continue
> exec will replace the current child process with the given command and as
> we are doing fork the command will get executed in a child process.You can
> also use os.system there
>
> On 12 Mar 2007 16:13:51 -0700, Henrik Lied <henriklied at gmail.com > wrote:
> >
> > Hi there!
> >
> > I'm trying to create a video uploading service (just to learn). The
> > system is mostly based on Django, but the question I'm looking an
> > answer for is more related to Python.
> >
> > So, the user gets to upload a video file. This can either be a mpg,
> > avi or mp4-file. When the file is saved to its location, I want to
> > convert it to FLA (Flash Video). I'm currently using Mplayers
> > Mencoder, and this works great. The Mencoder is retrieved through
> > running os.system("mencoder variables here")
> >
> > The problem with this is that the user has to wait until the movie is
> > done encoding until he can go around with his business. I don't look
> > upon this as ideal.
> >
> > So - I want to spawn a new system process. I need some good pointers
> > on how to do this right.
> >
> > Any input? :-)
> >
> > Thanks a lot in advance!
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>
>
> --
> Regards--
> Rishi Pathak
> National PARAM Supercomputing Facility
> Center for Development of Advanced Computing(C-DAC)
> Pune University Campus,Ganesh Khind Road
> Pune-Maharastra
>



-- 
Med vennlig hilsen,
Henrik Lied
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From bruno.42.desthuilliers at wtf.websiteburo.oops.com  Fri Mar 16 10:31:33 2007
From: bruno.42.desthuilliers at wtf.websiteburo.oops.com (Bruno Desthuilliers)
Date: Fri, 16 Mar 2007 15:31:33 +0100
Subject: Importing
In-Reply-To: <1174052001.880975.165780@b75g2000hsg.googlegroups.com>
References: <1174052001.880975.165780@b75g2000hsg.googlegroups.com>
Message-ID: <45faaa14$0$6762$426a74cc@news.free.fr>

HMS Surprise a ?crit :
> Greetings,
> 
> First I will admit I am new to Python but have experience with C++ and
> some Tcl/Tk. I am starting to use a tool called MaxQ that  uses
> jython. I have been studying Rossum's tutorial but still am unclear on
> importing, 

What's your problem here ?

> the use of self,

In Python, a method is a wrapper around a function. This wrappers as a 
reference to the instance on which the method is called, and calls the 
wrapped function passing the instance as first argument. By convention, 
it's named 'self', but technically you could use any other name. So, to 
make a long story short:
  - you need to declare 'self' as the first argument of a method
  - you need to use self to access the current instance within the 
method body
  - you *don't* have to pass the instance when calling the method

> and calling functions with their own name

You mean the
   test = MaxQTest("MaxQTest")
line ?

First point: it's not a function call, it's an object instanciation. 
There's no 'new' keyword in Python, classes are callable objects acting 
as factory for their instances.

Second point: passing the name of the class here is specific to MaxQ, 
and I'd say it's only used for internal and display stuff.

> in quotes. In the code below the lines between #Start and #End are
> generated by browsing web pages. In a large test this section can
> become quite large. The maxQ documentation suggests breaking it up
> into functions. If so could these functions be placed in a separate
> file and imported?

Yes, but you'd have to bind them to the class manually (cf below).

> Is it acceptable to import into a class?

Yes, but this wont solve your problem. Import creates a module object in 
the current namespace, that's all.

> If
> imported as a function will self as used here need to be changed?

Nope.

def quux(self, foo):
   self.bar += foo

class Boo(object):
   def __init__(self, bar):
     self.bar = bar

Boo.quux = quux
b = Boo(40)
b.quux(2)
print b.bar



From ulrich.dorda at cern.ch  Fri Mar  2 05:35:50 2007
From: ulrich.dorda at cern.ch (Ulrich Dorda)
Date: Fri, 02 Mar 2007 11:35:50 +0100
Subject: float64 print digits
Message-ID: <45E7FE06.4050004@cern.ch>

I need a pytho nscript to read numbers(with loads of digits) from a 
file, do some basic math on it and write the result out to another file.

My problem: I don't get python to use more digits:

In order to try this I type:

The normal precision one:
 >>> from numpy import *
 >>> x=1.23456789123456789123456789
 >>> print "%35.25e" %x
    1.2345678912345679000000000e+000


    Now I try to use float64 to get more digits

 >>> z=zeros(3,float64)
 >>> z[0]
0.0
 >>> type(z[0])
<type 'numpy.float64'>
 >>> z[0]=1.23456789123456789123456789
 >>> type(z[0])
<type 'numpy.float64'>
 >>> print "%35.25e" %z[0]
    1.2345678912345679000000000e+000

This cuts the digits just like the 32bit case.

Can anyone please help me get more digits?

Thank you very much in advance,

Ulrich




From san.gujar at gmail.com  Fri Mar 23 03:25:52 2007
From: san.gujar at gmail.com (sandeep patil)
Date: 23 Mar 2007 00:25:52 -0700
Subject: python on window
Message-ID: <1174634752.580051.272560@l75g2000hse.googlegroups.com>

i have install python on window xp os.
C:/program files/python

i have done print program it working but .py can't  working
 help me  to how i will execute this file this file where i will save
it.
path execution how .
tell me about any envorment veriable in python to set before python
editor run,it path. etc
************************************************************

>>> print ' sandeep patil'
 sandeep patil
>>> print ' sandeep "bhagwan " patil ,msc. java j2ee developer"
SyntaxError: EOL while scanning single-quoted string
>>> print ' sandeep "bhagwan " patil ,msc. java j2ee developer'
 sandeep "bhagwan " patil ,msc. java j2ee developer
>>> import posix

Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    import posix
ImportError: No module named posix
>>> phonebook = {'sandeep':9325,'amit':9822,'anand':9890}
>>> phonebook = {'titu':9423,'dadu':9422,'giri':9326}
>>> inverted_phonebook=invert(phonebook)

Traceback (most recent call last):
  File "<pyshell#7>", line 1, in <module>
    inverted_phonebook=invert(phonebook)
NameError: name 'invert' is not defined
>>> def invert(table):
    index={}
    for key in table.key():
        value=table[key]
        if not index.has_key(value):
            index[value]=[]
        index[value].append(key)
        return index
************************************************************************



From israphelr at googlemail.com  Sat Mar 24 19:51:44 2007
From: israphelr at googlemail.com (israphelr at googlemail.com)
Date: 24 Mar 2007 16:51:44 -0700
Subject: Step value and function
Message-ID: <1174780304.127866.251340@p77g2000hsh.googlegroups.com>

Hi there. So I have a challenge in the Python book I am using (python
programming for the absolute beginner) that tells me to improve a
function, so that it can be called with a step value, and I havn't
been able to find out yet what's meant by a step value, but i'll keep
looking of course. I'd just be grateful if someone could illimunate
this for me.

Thanks in advance.



From http  Fri Mar  2 19:46:05 2007
From: http (Paul Rubin)
Date: 02 Mar 2007 16:46:05 -0800
Subject: Sort with extra variables
References: <pan.2007.03.02.19.29.39@gmail.com>
	<7xlkifh1lw.fsf@ruckus.brouhaha.com>
	<pan.2007.03.02.23.08.35@gmail.com>
Message-ID: <7xr6s79msy.fsf@ruckus.brouhaha.com>

Thomas Dybdahl Ahle <lobais at gmail.com> writes:
> Do you mean that I add my moves something like this?
> 
> from heapq import heappush, heappop
> heap = []
> for move in genAll():
>     heappush(heap, (-getMoveValue (board, table, ply, move), move))
> 
> And then use heappop(heap) in the alphabeta loop?

Yes, something like that.  If you want to get, say, the five smallest
values in a list, heapq lets you do that without having to sort the
whole list.


From frank-python at benkstein.net  Mon Mar 26 14:44:48 2007
From: frank-python at benkstein.net (Frank Benkstein)
Date: Mon, 26 Mar 2007 20:44:48 +0200
Subject: PEP 3115 in Python 2.6?
Message-ID: <20070326204448.0c7fed8d@localhost>

Hi,

is there any possibility to see PEP 3115 implemented for Python 2.6?
AFAICS there's nothing about it that should limit it's implementation
to Python 3000 if backwards compatibility with '__metaclass__' is
preserved. At least the '__prepare__' in metaclasses method would be
very useful. Keyword parameters to the class statement are not so
important IMHO.

Best regards
Frank Benkstein.

-- 
GPG (Mail): 7093 7A43 CC40 463A 5564  599B 88F6 D625 BE63 866F
GPG (XMPP): 2243 DBBA F234 7C5A 6D71  3983 9F28 4D03 7110 6D51
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From nagle at animats.com  Tue Mar 13 16:01:42 2007
From: nagle at animats.com (John Nagle)
Date: Tue, 13 Mar 2007 20:01:42 GMT
Subject: Communicating with a DLL under Linux
In-Reply-To: <mailman.5023.1173805183.32031.python-list@python.org>
References: <mailman.5023.1173805183.32031.python-list@python.org>
Message-ID: <GqDJh.6732$yW.6124@newssvr11.news.prodigy.net>

Mikael Olofsson wrote:
> I am interested in peoples experience with communicating with DLLs under 
> Linux.
> 
> Situation:
> 
> I'm an electrical engineer that finds pleasure in using my soldering 
> iron from time to time. I also find programming, preferably in Python, 
> entertaining. I wouldn't call myself a programmer, though. Now, I may 
> have found a hobby project that could give me the pleasure from both 
> those worlds. There's this USB development gadget for sale in my 
> favourite electronics store, and I sure would like to have something 
> like that connected to my lab computer (a fairly new budget computer 
> running Kubuntu 6.06).

     Take a look at Wiring:

	http://wiring.org.co/

That's an interface board with considerable onboard processing power
and a whole no-cost development environment that runs under Linux
or Windows.  It's intended for artists who want to build projects that need
some computer control.

				John Nagle


From bdesth.quelquechose at free.quelquepart.fr  Mon Mar  5 17:35:28 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Mon, 05 Mar 2007 23:35:28 +0100
Subject: Project organization and import
In-Reply-To: <1173112353.210937.214020@v33g2000cwv.googlegroups.com>
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
	<87mz2s32rb.fsf@gmail.com>
	<1173112353.210937.214020@v33g2000cwv.googlegroups.com>
Message-ID: <45ec933a$0$15549$426a34cc@news.free.fr>

Martin Unsal a ?crit :
(snip)
> When refactoring, it's much better to move small files around than to
> move chunks of code between large files.

Indeed. But having hundreds or thousands of files each with at most a 
dozen lines of effective code is certainly not an ideal. Remember that 
Python let you tell much more in a few lines than some mainstream 
languages I won't name here.

> 
>>I don't reload...  When my investigative tests gets bigger I write a script
>>and run it with the interpreter.  It is easy since my text editor can call
>>Python on a buffer (I use Emacs).
>  
> That's interesting, is this workflow pretty universal in the Python
> world?

I don't know, but that's also mostly how I do work.

> I guess that seems unfortunate to me, 

So I guess you don't understand what Jorge is talking about.

> one of the big wins for
> interpreted languages is to make the development cycle as short and
> interactive as possible. 

It's pretty short interactive. Emacs Python mode let you fire up a 
subinterpreter and eval either your whole buffer or a class or def block 
or even a single expression - and play with the result in the 
subinterpreter.

> As I see it, the Python way should be to
> reload a file and reinvoke the class directly, not to restart the
> interpreter, load an entire package and then run a test script to set
> up your test conditions again.

^Cc^C! to start a new interpeter
^Cc^Cc to eval the whole module

Since the module takes care of "loading the entire package", you don't 
have to worry about this. And since, once the script eval'd, you still 
have your (interactive) interpreter opened, with all state set, you can 
then explore at will. Try it by yourself. It's by far faster and easier 
than trying to manually keep track of the interpreter state.


From rowen at cesmail.net  Tue Mar  6 14:50:57 2007
From: rowen at cesmail.net (Russell E. Owen)
Date: Tue, 06 Mar 2007 11:50:57 -0800
Subject: Project organization and import
References: <1173054099.721593.201870@h3g2000cwc.googlegroups.com>
Message-ID: <rowen-FD2621.11505706032007@gnus01.u.washington.edu>

In article <1173054099.721593.201870 at h3g2000cwc.googlegroups.com>,
 "Martin Unsal" <martinunsal at gmail.com> wrote:

> I'm using Python for what is becoming a sizeable project and I'm
> already running into problems organizing code and importing packages.
> I feel like the Python package system, in particular the isomorphism
> between filesystem and namespace, doesn't seem very well suited for
> big projects. However, I might not really understand the Pythonic way.
> I'm not sure if I have a specific question here, just a general plea
> for advice.
> 
> 1) Namespace. Python wants my namespace heirarchy to match my
> filesystem heirarchy. I find that a well organized filesystem
> heirarchy for a nontrivial project will be totally unwieldy as a
> namespace. I'm either forced to use long namespace prefixes, or I'm
> forced to use "from foo import *" and __all__, which has its own set
> of problems.

> 1a) Module/class collision. I like to use the primary class in a file
> as the name of the file. However this can lead to namespace collisions
> between the module name and the class name. Also it means that I'm
> going to be stuck with the odious and wasteful syntax foo.foo
> everywhere, or forced to use "from foo import *".

The issue of module names vs contained class names is one thing I find a 
bit frustrating about python. Fortunately it is fairly easy to work 
around.

My own solution has been to import up just one level. So for example:
pkg/subpkg/foo.py defines class foo and associated stuff
pkg/subpkg/bar.py defines class bar
pkt/subpkg/__init__.py contains:

from foo import *
from bar import *

To use this I then do:
import pkg.subpkg
myfoo = pkg.subpkg.foo(...)

But that's the only "from x import" that I do. I never raise stuff from 
a sub-package to a higher level.

Once you do this (or in some other way eliminate the foo.foo problem), I 
think you will find that python namespaces work very well for large 
projects.

Overall I personally like having the namespace follow the file structure 
(given that one has to use source files in the first place; my smalltalk 
roots are showing). Java reportedly does much the same thing and it is 
very helpful for finding code.

I'm sure it's partly what you're used to that counts. C++ experts 
probably enjoy the freedom of C++ namespaces, but to me it's just a pain 
that they are totally independent of file structure.

> 1b) The Pythonic way seems to be to put more stuff in one file, but I
> believe this is categorically the wrong thing to do in large projects.
> The moment you have more than one developer along with a revision
> control system, you're going to want files to contain the smallest
> practical functional blocks. I feel pretty confident saying that "put
> more stuff in one file" is the wrong answer, even if it is the
> Pythonic answer.

I don't personally find that python encourages lots of code per file. I 
think this perception only stems from (1a) and once you solve that 
you'll find it's fine to divide your code into small files.

> 2) Importing and reloading. I want to be able to reload changes
> without exiting the interpreter. This pretty much excludes "from foo
> import *", unless you resort to this sort of hack:
> 
> http://www.python.org/search/hypermail/python-1993/0448.html
> 
> Has anyone found a systematic way to solve the problem of reloading in
> an interactive interpreter when using "from foo import *"?

I totally agree here. This is a real weakness to python and makes it 
feel much more static than it ought to be. I know of no solution other 
than restarting. That tends to be fast, but it can be a pain to get back 
to where you were.

Smalltalk solved this problem long ago in a way that makes for very 
dynamic development and debugging. Unfortunately few languages have 
followed suit. The Smalltalk development environment is the one feature 
I really miss in all other languages I've used (I certainly don't miss 
its quirky syntax for control flow :)).

-- Russell


From johnpenk7 at yahoo.com  Mon Mar 26 14:17:34 2007
From: johnpenk7 at yahoo.com (jp)
Date: 26 Mar 2007 11:17:34 -0700
Subject: PMW widget - skip tabbing to it
In-Reply-To: <1174930461.108420.219960@d57g2000hsg.googlegroups.com>
References: <1174924280.581238.162350@n59g2000hsh.googlegroups.com>
	<1174925855.552135.228190@n59g2000hsh.googlegroups.com>
	<1174926471.899631.228810@e65g2000hsc.googlegroups.com>
	<1174926951.133085.294900@l75g2000hse.googlegroups.com>
	<1174930461.108420.219960@d57g2000hsg.googlegroups.com>
Message-ID: <1174933054.671047.217640@n59g2000hsh.googlegroups.com>

On Mar 26, 12:34 pm, kyoso... at gmail.com wrote:
> On Mar 26, 11:35 am, "jp" <johnpe... at yahoo.com> wrote:
>
>
>
> > On Mar 26, 11:27 am, kyoso... at gmail.com wrote:> On Mar 26, 11:17 am, kyoso... at gmail.com wrote:
>
> > > > On Mar 26, 10:51 am, "jp" <johnpe... at yahoo.com> wrote:
>
> > > > > I have multiple PMW widgets (EntryFields, ScrolledField etc), how can
> > > > > I skip over these widgets when using the tab key?
>
> > > > > Thank you,
> > > > > John
>
> > > > I would probably write some custom event handling. Something that
> > > > could tell it was a key-press event and not just an on-focus event.
> > > > Then it would be a simple, if key-press == tab, put focus on next
>
> > #> > widget of interest. Something like that should work.
>
> > > > Mike
>
> > > I looked in my Tkinter book, and it says that if the widget has the
> > > "takefocus" option set to true, the widget is placed in the tab group
> > > and will get focus when they are tabbed to. I assume that this means
> > > if you set the PMW widgets' "takefocus" option to false, they will be
> > > skipped over since they won't be in the tab group.
>
> > > Mike
>
> > I've tried using the takefocus option set to 0 and 1 but either way,
> > the tab key still stops at my EntryField.  Below is my snippet of
> > code.  What am I doing wrong?
>
> > entry=Pmw.EntryField(frame,
> >                      labelpos = 'w',
> >                      value = "",
> >                      label_text =
> > 'Name:')
> > entry.grid(row=1)
> > #entry.component('entry').takefocus = 1
> > entry.component('entry').takefocus = 0
>
> According to the Tkinter book, setting takefocus to 0 (false) should
> work. Are you putting th EntryField into a Grid? If so, that might be
> the problem. I suppose the grid may override its children's settings.
>
> I've never messed too much with skipping widgets in the tab order. You
> could pack the PMW widgets last so that they won't get tabbed to until
> the end.
>
> There's also tk_focusNext & tk_focusPrev. See the following post for
> more info and ideas:
>
> http://www.dbforums.com/archive/index.php/t-1377788.html
>
> Mike


I am using a grid, but even using pack() the takefocus=0 doesn't
work.  The tab key still moves to my EntryField.
I'll look into the focusNext and focusPrev that you suggested.  Thanks!



From p_shakil at yahoo.com  Tue Mar  6 19:23:59 2007
From: p_shakil at yahoo.com (p_shakil at yahoo.com)
Date: 6 Mar 2007 16:23:59 -0800
Subject: Interface Implementation in Python
In-Reply-To: <1173210940.884656.158180@t69g2000cwt.googlegroups.com>
References: <1173140703.325379.199240@v33g2000cwv.googlegroups.com>
	<mailman.4718.1173194071.32031.python-list@python.org>
	<1173210940.884656.158180@t69g2000cwt.googlegroups.com>
Message-ID: <1173227039.060361.134060@8g2000cwh.googlegroups.com>

On Mar 6, 11:55 am, "Goldfish" <gregt... at mindspring.com> wrote:
> > >  I would like to know the interface concept in Python.How the
> > > Interface is defined and implemented in Python?.
>
> One way I have implemented interfaces, is as follows:
>
> class MyInterface(object):
>     def someMethod(self, argument):
>         raise NotImplementedError()
>
> If anybody ever uses that class directly, or subclasses it without
> implementing a real version of that method, a runtime error can be
> expected. This bridges both interfaces and abstract classes.
>
> As others have pointed out, this isn't quite like a Java interface,
> but I have found it useful to state my intentions up front, and that
> is how I do it. The only way to truly enforce this is by following up
> with lots of good test cases, run often.


I have a class by name Point3D in Python.

class Point3D :
def __int(self):
self.__x =0.0
self.__y =0.0
self.__z =0.0

def setPoint(x,y,z):
self.__x =x
self.__y =y
self.__z =z

def getPoint(x,y,z):
x = self.__x
y = self.__y
z = self.__z

I dont want to expose the above Point3D implementation to the user /
client side.To achieve that we can use interface concept.In Python to
use interface concept.

How the interface class looks like for Point3D in python?.

How to implement that Interface?

How to access the implemented interface thru Interface Object in the
client side?

It will be helpful if somebody proivide a piece of sample code for
creating the interface for the above access at the client place

in C++ these can be done in this way

class IPoint : public IUnknown{
virtual void setPoint(int x,int y,int z)=0;
virtual void getPoint(&x,&y,&z)=0;
}

class Point3D: public IPoint {
private :
float _x ,_y,_z;
public:
void Point3D() {
_x=_y=_z =0
}
void setPoint(int x,int y,int z){

_x =x
_y =y
_z =z


}
void getPoint(&x,&y,&z){
x = _x
y = _y
z = _z
}
}

Access the Point data in the client side

IPoint *pIPoint = NULL;
pISampleInterface = CoCreateInstance(..);
...............
pISampleInterface ->QueryInstance(IID_IPoint ,(void*&)pIPoint )

// We have the pIPoint interafce
float dX =0,dY=0,dZ=0;

pIPoint->setPoint(10,20,30);

pIPoint->getPoint(&dX ,&dY,&dZ);

printf ( "%f,%f%f",dX ,dY,dZ);

10.0 20.0 30.0


Thanks
PSB

--------------------------------------------------------------------------------





From paul at boddie.org.uk  Mon Mar  5 18:12:16 2007
From: paul at boddie.org.uk (Paul Boddie)
Date: 5 Mar 2007 15:12:16 -0800
Subject: Squisher -- a lightweight, self-contained alternative to eggs?
In-Reply-To: <9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>
References: <1173076302.035996.118480@n33g2000cwc.googlegroups.com>
	<45ec89a4$0$2349$426a74cc@news.free.fr>
	<1173131863.216300.109120@s48g2000cws.googlegroups.com>
	<9018$45ec9619$d443bb3a$19973@news.speedlinq.nl>
Message-ID: <1173136336.255925.222700@p10g2000cwp.googlegroups.com>

Stef Mientki wrote:
>
> As a normal Windows user,
>    I'm used to run an install file,
>      and hit just 1 button.
> As a normal Windows programmer,
>    I'm used to create a simple Inno-setup file,
>      and my users can behave as a simplistic and happy Windows user.
>
> But I guess the needed complexity is all thanks to NIX ;-)

"Au contraire, as they say in England." - Steve X. Citement

Most UNIX-based (or at least GNU/Linux or BSD-based) Python users are
likely to have Python provided by their vendor together with a
"constellation" of packages. As long as the software they need is
packaged by their distribution, it's a matter of selecting the package
concerned; other packages upon which the desired software depends will
be installed automatically. You don't usually need to click through
some wizard ("next", "I agree", "next", "next", "next", "next",
"next", "finish"), either.

Paul



From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 21 17:16:47 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 22:16:47 +0100
Subject: parsing combination strings
In-Reply-To: <1174504721.913698.178380@e1g2000hsg.googlegroups.com>
References: <1174502549.103908.129150@b75g2000hsg.googlegroups.com>
	<mailman.5416.1174504434.32031.python-list@python.org>
	<1174504721.913698.178380@e1g2000hsg.googlegroups.com>
Message-ID: <46019843$0$15530$426a74cc@news.free.fr>

PKKR a ?crit :
> On Mar 21, 2:51 pm, "Steven D. Arnold" <stev... at neosynapse.net> wrote:
> 
>>On Mar 21, 2007, at 2:42 PM, PKKR wrote:
>>
>>
>>>I need a fast and efficient way to parse a combination string(digits +
>>>chars)
>>
>>>ex: s = "12ABA" or "1ACD" or "123CSD" etc
>>
>>>I want to parse the the above string such that i can grab only the
>>>first digits and ignore the rest of the chacters,
>>
>>A regex leaps to mind.....have you investigated the "re" module?
>>
>> >>> import re
>> >>> re.match(r'(\d+)', '123abc').group(1)
>>'123'
>>
>>steven
> 
> 
> 
> yep thats what i tried as per tommy's advice and came up with:
> 
> re.split('[^0-9]', str)[0]

avoid using 'str' as an identifier (unless it's ok for you to shadow the 
builtin string type)

> or is there a better way?
> 
exp = re.compile(r'^([0-9]+)')
for s in ["12ABA", "1ACD", "123CSD"]:
     print exp.match(line).group(0)
=> 12
=> 1
=> 123


From nick at craig-wood.com  Mon Mar 19 15:30:07 2007
From: nick at craig-wood.com (Nick Craig-Wood)
Date: Mon, 19 Mar 2007 14:30:07 -0500
Subject: Using pxssh
References: <1174318801.995293.246230@d57g2000hsg.googlegroups.com>
Message-ID: <slrnevtmt6.945.nick@irishsea.home.craig-wood.com>

tereglow <tom.rectenwald at eglow.net> wrote:
>  I am trying to convert some Expect/Tcl code into Python by using the
>  Pexpect module.  The environment is such that authenticated keys are
>  disabled although SSH is available.  I do not have control over this
>  environment, so I'm trying to automate tasks within it via Expect.
> 
>  I noticed that, within the Pexpect documentation, it mentions a class
>  called "pxssh".  Has anyone used this before?  If so, I'm having some
>  trouble importing it.  If I just import pxssh doesn't seem to work;

In what way doesn't it work?

>  really am not sure how this is related to Pexpect or how to use it
>  from within it.

It works for me according to the documentation

  $ python
  Python 2.4.4 (#2, Jan 13 2007, 17:50:26) 
  [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import pxssh
  >>> s = pxssh.pxssh()
  >>> s.login("localhost", "user", "password")
  True
  >>> s.sendline("ls -l")
  6
  >>> s.prompt()
  True
  >>> print s.before
  ls -l
  total 30944
  -rw-r--r--   1 user  user       936 Nov  3 14:52 #z.c#
  [snip]
  -rw-r--r--   1 user  user       221 Jan 30 11:51 z~
  >>> s.logout()
  >>> 

I'm using the debian packaged version 2.1-1 with python 2.4

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick


From spam at chezmarshall.freeserve.co.uk  Fri Mar  9 16:23:47 2007
From: spam at chezmarshall.freeserve.co.uk (Robert Marshall)
Date: Fri, 09 Mar 2007 21:23:47 +0000
Subject: 2 new comment-like characters in Python to aid development?
References: <1173431686.793240.11780@p10g2000cwp.googlegroups.com>
	<m11wjyy7p5.fsf@chezmarshall.freeserve.co.uk>
	<slrnev2m9v.179.nick@irishsea.home.craig-wood.com>
	<45f185f2$0$21511$426a34cc@news.free.fr>
	<Aai*6UgFr@news.chiark.greenend.org.uk>
Message-ID: <m1slcew1p8.fsf@chezmarshall.freeserve.co.uk>

On 09 Mar 2007, Matthew Woodcraft wrote:

> Bruno Desthuilliers  <bruno.42.desthuilliers at wtf.websiteburo.oops.com> wrote:
>>>>> Nick Craig-Wood a ecrit :
>>>>>> I use # FIXME for this purpose or /* FIXME */ in C etc.
>>>>>>
>>>>>> I have an emacs macro which shows it up in bright red / yellow
>>>>>> text so it is easy to see
> 
>> Thanks you both.
> 
> For what it's worth, sufficiently recent versions of emacs
> python-mode have this built in.
> 

Is this with xemacs python mode or have you downloaded python mode
separately from emacs?  I've got the latest emacs cvs (well a week
old) and it doesn't have it, or is it very,very recent?

Robert
-- 
La grenouille songe..dans son ch?teau d'eau
Links and things http://rmstar.blogspot.com/


From gagsl-py2 at yahoo.com.ar  Fri Mar 30 17:17:41 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 30 Mar 2007 18:17:41 -0300
Subject: Modal value of an array
References: <1175139622.547938.73080@o5g2000hsb.googlegroups.com>
	<877it0u2h4.fsf@benfinney.id.au>
	<1hvpovd.1anin2by4gjl1N%aleax@mac.com>
	<1175208296.769865.186480@r56g2000hsd.googlegroups.com>
Message-ID: <op.tp0tfrswx6zn5v@gabriel2.softlabbsas.com.ar>

En Thu, 29 Mar 2007 19:44:56 -0300, Paddy <paddy3118 at googlemail.com>  
escribi?:

> On Mar 29, 8:49 am, a... at mac.com (Alex Martelli) wrote:

>> >>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
>> >>> max(foo, key=foo.count)
>>
>> 'spam'
>
> This doesn't call foo.count for duplicate entries by keeping a cache
>
>>>> foo = ["spam", "eggs", "spam", "spam", "spam", "beans", "eggs"]
>>>> def cachecount(x, cache={}):
> ... 	return cache.setdefault(x, foo.count(x))

Unfortunately it does, because all arguments are evaluated *before* a  
function call, so you gain nothing.

-- 
Gabriel Genellina



From fred at adventistcare.org  Tue Mar 13 12:46:57 2007
From: fred at adventistcare.org (Sells, Fred)
Date: Tue, 13 Mar 2007 12:46:57 -0400
Subject: i can`t get python working on the command line (linux)
Message-ID: <BB295D7C21C5344E94A3EEBA9089BD940326A3@accmail2.sunbelt.org>

looks like it is expecting command line agrs that are not there.

put this at the top of your code to see what's going on

import sys
print sys.argv

remembering that the first element printed is sys.argv[0]



-----Original Message-----
From: python-list-bounces+frsells=adventistcare.org at python.org
[mailto:python-list-bounces+frsells=adventistcare.org at python.org]On
Behalf Of Mark
Sent: Tuesday, March 13, 2007 10:04 AM
To: python-list at python.org
Subject: i can`t get python working on the command line (linux)
[html-removed]


Hey,

first of all: sorry for the 100% n00b question
i`m brand new to python and i seem to start off with the biggest problem of
all.. not even getting python to work.
i`m running Fedora core 7 test 2 and all the python based applications are
working fine (like pirut, pipet, and some other yum related tools)

but when i try to run this script:

#!/usr/bin/python
#
# python script tel.py
# gevonden door Jan Mooij 24 september 2000
#
from sys import *
from string import *

     # Create an empty dictionary.
count = {}

for line in open(argv[1], 'r').readlines():
    for word in split(line):
        if count.has_key(word):
            count[word] = count[word] + 1
        else:
            count[word] = 1
words = count.keys()
words.sort()
for word in words:
    print "%15s\t%10d" % (word, count[word])


and i`ve put it in tel.py (just the same as in the sample) than chmod
it to 777 (just to make sure it isn`t a permission issue) and than i
run it with: ./tel.py
now this is the error that i get:

Traceback (most recent call last):
  File "./tel.py", line 12, in <module>
    for line in open(argv[1], 'r').readlines():
IndexError: list index out of range

also i`m not even getting the most simple sample code to work.. "Hello
World".
everything works fine when i first enter the python console by typing
python. than i have the  >>> things
than print "Hello World" gives me the expected result but that`s not
what i want.. i want to do it from a file..

the solution is probable extremely simple but i have no idea as a
complete n00b in python. i do have alot php experience.
hope someone could help me out with this.

o and any function that i use in python gives me "command not found:
print/whatever function i use"
(probable just a simple yum install command that i need to do to get
this working.. just try to figure that out with no python knowledge)

Thanx alot in favor.
-- 
http://mail.python.org/mailman/listinfo/python-list


From bdesth.quelquechose at free.quelquepart.fr  Wed Mar 21 17:34:45 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Wed, 21 Mar 2007 22:34:45 +0100
Subject: Technical Answer - Protecting code in python
In-Reply-To: <1174502032.402958.213090@y66g2000hsf.googlegroups.com>
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<1174502032.402958.213090@y66g2000hsf.googlegroups.com>
Message-ID: <46019c78$0$14548$426a74cc@news.free.fr>

gtb a ?crit :
> On Mar 21, 8:36 am, "flit" <superf... at gmail.com> wrote:
> 
(snip)

>>2 - If I put the code in web like a web service, how can I protect my
>>code from being ripped? There is a way to avoid someone using my site
>>and ripping the .py files?
>>
>>Thanks and sorry for the introduction
> 
> 
> Maybe an application for php. Then any html visible is not source but
> result of execution of php.

Why would you want to use php ??? Python is far better for web 
development than php will ever be.


From kosh at aesaeion.com  Sat Mar  3 04:26:29 2007
From: kosh at aesaeion.com (William Heymann)
Date: Sat, 3 Mar 2007 02:26:29 -0700
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <87y7me22dl.fsf@benfinney.id.au>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<54sl5dF21mn73U1@mid.individual.net>
	<87y7me22dl.fsf@benfinney.id.au>
Message-ID: <200703030226.29137.kosh@aesaeion.com>

On Saturday 03 March 2007, Ben Finney wrote:
> Bjoern Schliessmann <usenet-mail-0306.20.chr0n0ss at spamgourmet.com> writes:
>
>     if not recs.has_key(piid):      # [1]
>
Why not

if piid not in recs:

That is shorter, simpler, easier to read and very slightly faster. Plus you 
can change the data structure of recs later without changing that line so 
long as it implements containment testing.



From aleax at mac.com  Fri Mar  9 02:00:06 2007
From: aleax at mac.com (Alex Martelli)
Date: Thu, 8 Mar 2007 23:00:06 -0800
Subject: merits of Lisp vs Python
References: <1165576029.316969.24690@j72g2000cwa.googlegroups.com>
	<1165613280.584178.36470@16g2000cwy.googlegroups.com>
	<1165627684.709241.86340@16g2000cwy.googlegroups.com>
	<1165685950.758858.18960@n67g2000cwd.googlegroups.com>
	<1165732072.056289.274460@79g2000cws.googlegroups.com>
	<XPGHh.1336$_a1.998@bignews7.bellsouth.net>
	<eCHHh.3014$tv6.280@newssvr19.news.prodigy.net>
	<1173329966.266070.283130@8g2000cwh.googlegroups.com>
	<7xtzww5nu6.fsf@ruckus.brouhaha.com>
Message-ID: <1huohy5.1273xi3mtqdc2N%aleax@mac.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> "alex23" <wuwei23 at gmail.com> writes:
> > > Hosting providers and distro
> > > makers aren't concerned over whether Python works.  They
> > > care if C, C++, Java, PHP, and Perl work, but not Python or LISP.
> > > Ask them.
> > 
> > Do you have any real experience with recent linux distros? Or with any
> > _real_ hosting providers?
> 
> Care to name a "real" hosting provider that cares whether Python works?

The first name that comes to mind is xs4all, the major Dutch provider
(they've even got their own Wikipedia entry!-) -- they've long offered
outstanding sponsorship to the Python community, hosting lots of
services for us, btw.

But the OP's mention of "distro" ain't even funny -- ever since RedHat's
original implementation of RPM (in Python), ever more Linux distros are
positively _fanatical_ about Python.  Ubuntu, for example, has as its
BDFL Mark Shuttleworth, who (since, as he explains, he made his fortune
thanks to Python -- Python's what allowed him to build Thawte, which he
later sold for mucho dinero) is an unabashed fan of Python; the "XO"
(nee "One Laptop Per Child", OLPC, and once known as the "$100 laptop")
uses Python as its preferred (only?-) application language, and it's
slated to be the most widely distributed Python distro if it hits even
half of its ambitious target-numbers...


Alex


From ken.carlino at gmail.com  Thu Mar 29 11:23:00 2007
From: ken.carlino at gmail.com (ken)
Date: 29 Mar 2007 08:23:00 -0700
Subject: What is the timeout value of HTTP
Message-ID: <1175181779.889368.38170@l77g2000hsb.googlegroups.com>

Can you please tell me what is the timeout value of httplib.HTTP?

i.e. how long python will wait for a response in the below code?

   h = httplib.HTTP(self.url, 8080)
        h.putrequest('GET', '/sample/?url=' + self.url)
        h.endheaders()

Thank you.



From steve at REMOVE.THIS.cybersource.com.au  Wed Mar 21 13:32:12 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Thu, 22 Mar 2007 04:32:12 +1100
Subject: Technical Answer - Protecting code in python
References: <1174484176.392674.220040@d57g2000hsg.googlegroups.com>
	<pan.2007.03.21.16.23.54.575318@REMOVE.THIS.cybersource.com.au>
	<1174496172.528613.236730@p15g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.21.17.32.10.351641@REMOVE.THIS.cybersource.com.au>

On Wed, 21 Mar 2007 09:56:12 -0700, flit wrote:

> First I wanna thanks the all people who gives good contribution to
> this thread, thank you all..

But they haven't. They've given answers to an ill-posed question. How can
anyone tell you how to "protect code" when you haven't told us what you
want to protect against?



>> Until you tell us what you are trying to protect against, your question
>> is meaningless.
> 
> In this time I supposed someone took too much coffee..But will
> ignore..

That is the absolute core of the problem. What are you trying to protect
against? If you can't even answer that question, then how do you expect to
find a solution?

If a customer came to you and offered you money to "protect this data",
what would you do? 

Surely the FIRST thing you would need to do is find out, protect it from
what? What problem does the customer want you to solve?

Does the customer want error correction codes so he can transmit it
over a noisy data channel? Does the customer just want an off-site backup
he can take home? Does he want it encrypted? Or does he just want it
copyrighted, so it is legally protected? Or does he want you to go out and
hire a big strong man with a club to stand over the disk and hit people on
the head if they get too close?


>> Is your program valuable? Is it worth money? Then the 90% of script
>> kiddies will just wait three days, and download the program off the
>> Internet after the real hackers have broken your protection.
>>
>> If it is NOT valuable, then why on earth do you think people will put up
>> with whatever "protection" you use? Why won't they just use another
>> program?
> 
> It?s doesn?t matter if it is the next BIG HIT Ultra-fast-next-google
> thing or a programm to take control of my "pet-people-living-in-
> welfare-trying-to-be-political"
> It?s a technical question, 

No it isn't. You only think it is a technical question. 

You said it yourself: you have to make money. How much money are you going
to make if you spend all your time solving the technical question of
"protecting" your software, if nobody wants your software? What is the
value of the protection? Should you spend a thousand hours protecting it,
or a hundred hours, or ten, or one, or one minute, or nothing at all?

What's your business model for making money? That is far more important
than whether you can send out a .pyc file or how many people know how to
use the Python disassembler.

Maybe you'll make MORE money by giving the software away for free and
charging for services. Would you rather sell ten copies of your software
at $20 each, or give away ten thousand copies and charge five hours of
consulting services at $100 an hour?

The "technical problem" is the LEAST important part of the real problem,
which is "how do I make money from this?".


-- 
Steven.



From michael at stroeder.com  Wed Mar  7 15:08:41 2007
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Wed, 07 Mar 2007 21:08:41 +0100
Subject: using python to query active directory
In-Reply-To: <1234705.TuyeK9pzyv@teancum>
References: <1234705.TuyeK9pzyv@teancum>
Message-ID: <9ni3c4-31h.ln1@nb2.stroeder.com>

David Bear wrote:
> Is it possible to use python to make calls agains microsoft active
> directory?

What do you mean with "calls agains microsoft active directory"?
Querying user and computer entries etc.?

python-ldap might be an option for you.

Ciao, Michael.


From steve at holdenweb.com  Wed Mar 14 16:51:42 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 16:51:42 -0400
Subject: Converting a list to a dictionary
In-Reply-To: <1173904326.037621.10390@n76g2000hsh.googlegroups.com>
References: <1173902878.561018.244310@y80g2000hsf.googlegroups.com>	<45f8583d$0$10407$426a34cc@news.free.fr>
	<1173904326.037621.10390@n76g2000hsh.googlegroups.com>
Message-ID: <et9nbl$5s3$1@sea.gmane.org>

Drew wrote:
> On Mar 14, 4:52 pm, Bruno Desthuilliers
> <bdesth.quelquech... at free.quelquepart.fr> wrote:
> 
>> res_dict = dict((r.get_id(), r) for r in res_list)
> 
> I'm using Python2.5 and it seems that this only gives me a hash with
> the first id and first record. Am I doing something wrong?
> 
>>>> class Person():
> ...     def __init__(self):
> ...             self.id = 5
> ...
>>>> mylist = []
>>>> for i in range(100):
> ...     mylist.append(Person())
> ...
>>>> mydict = dict((r.id,r) for r in mylist)
>>>> mydict
> {5: <__main__.Person instance at 0x00A99EE0>}
> 
Well, you aren't actually using the object's id() value as the dict key, 
but the value of its id attribute. Since all the instances you create 
have the same value for that attribute each change to the dict (except 
the first) overwrites the immediately preceding change - you can't have 
100 values in a dict all with the same key!

Try:

  >>> mydict = dict((id(r), r) for r in mylist)

and you'll find you then get a dict with 100 elements.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From bj_666 at gmx.net  Thu Mar 29 09:43:05 2007
From: bj_666 at gmx.net (Marc 'BlackJack' Rintsch)
Date: Thu, 29 Mar 2007 15:43:05 +0200
Subject: Problem with class variables
References: <slrnf0nfph.8f9.f98dawa@remote1.student.chalmers.se>
Message-ID: <pan.2007.03.29.13.43.05.686283@gmx.net>

In <slrnf0nfph.8f9.f98dawa at remote1.student.chalmers.se>, Dag wrote:

> I have a problem which is probaly very simple to solve, but I can't
> find a nice solution.
> I have the following code 
> 
> class Test:
>     def __init__(self):
>         self.a=[1,2,3,4]
>         self.b=self.a
          self.b = list(self.a)

BTW this is about instance variable, not class variables.

Ciao,
	Marc 'BlackJack' Rintsch


From robin at NOSPAMreportlab.com  Mon Mar 26 18:31:03 2007
From: robin at NOSPAMreportlab.com (Robin Becker)
Date: Mon, 26 Mar 2007 22:31:03 +0000
Subject: detect suprocess interaction 
In-Reply-To: <slrnf0f2mf.7t3.nick@irishsea.home.craig-wood.com>
References: <mailman.5521.1174670106.32031.python-list@python.org>
	<slrnf0f2mf.7t3.nick@irishsea.home.craig-wood.com>
Message-ID: <460849A7.1060804@jessikat.plus.net>

Nick Craig-Wood wrote:
> Robin Becker <robin at reportlab.com> wrote:
>>  I'm using subprocess to carry out svn commands (probably should use the svn api 
.............
>>
>>  Clearly I need to supply some kind of input filelike object, but is this sort of 
>>  thing possible.
> 
> Yes it is possible, but if you try it you'll find you'll need to
> implement the fileno() method of file objects which is asked to return
> an OS file handle.  This is obviously a problem!
> 

yes I figured I might have to do something low level, but it's not 
terribly obvious that I can detect the read at the other end ie normally 
we seem to detect when output is available, not when a write is required 
ie I might be able to write to the input of my command even if the 
command won't read.

> In general subprocess isn't really designed for interactive
> processes like the above.  You'll find it much easier to use pexpect
> for interactive stuff.
> 
> Note that svn has its own devious ways of finding a terminal to ask
> the user for the password, eg...
> 
> $ svn ls svn+ssh://user at 127.0.0.1/svn </dev/null >/dev/null 2>&1
> Password: 
> 
> I don't know exactly how it does that but I suspect it is to do with
> the controlling terminal...
> 
> On my system
> 
> $ setsid svn ls svn+ssh://user at 127.0.0.1/svn </dev/null >/dev/null 2>&1
> 
> Pops up a gui box asking for the password!
> 
> You can simulate the above with
> 
>   Popen(..., stdin=file(os.devnull,"r"), preexec_fn=os.setsid)
.....

this just makes life more interesting :)
-- 
Robin Becker


From steve at holdenweb.com  Sat Mar 17 06:48:09 2007
From: steve at holdenweb.com (Steve Holden)
Date: Sat, 17 Mar 2007 06:48:09 -0400
Subject: import error
In-Reply-To: <op.tpbvd5n1x6zn5v@gabriel2.softlabbsas.com.ar>
References: <BAY24-F8C0E318059EB1D9167F18A4700@phx.gbl>
	<op.tpbvd5n1x6zn5v@gabriel2.softlabbsas.com.ar>
Message-ID: <45FBC769.5070203@holdenweb.com>

Gabriel Genellina wrote:
> En Fri, 16 Mar 2007 23:49:43 -0300, Nick Burns <theodoremouse at hotmail.com>  
> escribi?:
> 
>> Quick question. I am running python on windows xp. i want to import my  
>> own
>> module "mymod". However, when I try to import it i get the error message  
>> "ImportError:
>> no module named mymod".
>>
>> "mymod" is located in a directory that is part of the computer's "path"  
>> env
>> variable. Imports fine if 'mymod' is in the current working directory,  
>> but not
>> otherwise. i had thought that by saving 'mymod'within my normal path  
>> that it
>> would import successfully, but this is not the case.
> 
> Python does not use the system PATH environment variable. Doing this:
> 
> import sys
> print sys.path
> 
> you will see the list of directories that Python would try. Try saving  
> your module inside site-packages.
> 

Or investigate appropriate settings of the PYTHONPATH environment 
variable, whose elements will be added to sys.path at interpreter 
startup. The "path" environment variable is for locating executables, 
not Python libraries.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From steve at holdenweb.com  Thu Mar 22 04:54:02 2007
From: steve at holdenweb.com (Steve Holden)
Date: Thu, 22 Mar 2007 04:54:02 -0400
Subject: Python 3000 idea: reversing the order of chained assignments
In-Reply-To: <ett5h2$1ll$1@sea.gmane.org>
References: <ets9hc$74f$1@news.onet.pl><pan.2007.03.21.22.28.43.880478@REMOVE.THIS.cybersource.com.au><etscd5$g0g$1@news.onet.pl><7WjMh.318$YL5.80@newssvr29.news.prodigy.net><1hvcadb.134pbvp1y39wi3N%aleax@mac.com>	<DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d@comcast.com>
	<ett5h2$1ll$1@sea.gmane.org>
Message-ID: <ettg9s$t94$1@sea.gmane.org>

Terry Reedy wrote:
> "Mark T" <nospam at nospam.com> wrote in message 
> news:DvGdnQacTuMlmp_bnZ2dnUVZ_uWdnZ2d at comcast.com...
> | This is interesting:
> |
> | >>> class Test(object):
> | ...   def __getattribute__(self,n):
> | ...     print 'reading',n
> | ...     return object.__getattribute__(self,n)
> | ...   def __setattr__(self,n,v):
> | ...     print 'writing',n,v
> | ...     return object.__setattr__(self,n,v)
> | ...
> | >>> x=Test()
> | >>> x.a=1; x.b=2; x.c=3
> | writing a 1
> | writing b 2
> | writing c 3
> | >>> x.a=x.b=x.c
> | reading c
> | writing a 3
> | writing b 3
> | >>>
> |
> | I wouldn't have expected "a" to be assigned first in a right-to-left 
> parsing
> | order.  The result is the same in any case.
> 
> The assignment order is specified in the language reference.

Where? I'm looking at

   http://docs.python.org/ref/assignment.html

right now.

> But many never read and those who do can forget.
> And even if the coder reads and remembers, a code reader may not have.
> Which is why I suggested multiple statements in explicit order when it 
> really matters.
> 
The current docs define

a, b = c, d

and

a = b, c, d

and

a, b, c = d

as valid assignments, but I can't find the part where

a = b = c

is defined. Help me out here. It looks as though the real syntax should 
be something like

assignment_stmt  	::=  	(target_list "=")+ expression_list |
                                 (target_list "=")+ assignment_stmt

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Recent Ramblings       http://holdenweb.blogspot.com



From wheelscribe at gmail.com  Wed Mar 21 11:27:18 2007
From: wheelscribe at gmail.com (ben miller)
Date: Wed, 21 Mar 2007 10:27:18 -0500
Subject: regex reading html
Message-ID: <949e5dd60703210827m29c87a66qb93df6e420c88e06@mail.gmail.com>

Hello,
I've a program I'm working on where we scrape some of our web pages
using Mechanize libraries and then parse what we've scraped using
different regex functions. However, I've noticed that no matter what I
do with the scraped content, regex functions can't find what they're
trying to match. If I take the same text and manually feed it to the
same regex functions, everything works as expected? Is there a
specific text transformation I need to apply before feeding the regex
functions?

Thanks!

-- 
wheelscsribe at gmail.com
http://wheelmind.blogspot.com


From chairos at gmail.com  Fri Mar 30 03:05:43 2007
From: chairos at gmail.com (Jon)
Date: 30 Mar 2007 00:05:43 -0700
Subject: Cheeseshop needs mirrors
Message-ID: <1175238342.963086.234370@e65g2000hsc.googlegroups.com>

I'm a frequent helper in the IRC channel for the Pylons web framework.
Pylons is installed from eggs using easy_install, and when Cheeseshop
is down (or so slow it might as well be down), it gives a bad
impression of our framework and Python in general. It took us half an
hour to figure out how to bootstrap setuptools onto one person's
machine, since ez_install.py sources from the cheeseshop, and even
when we got that installed, bootstrapping the rest of Pylons was very
troublesome.

If something as widely used as eggs is going to have a single point of
failure like the Cheeseshop, we can't have it going down.

I'm sure there are other solutions, but my suggestion is simply to
have mirrors. It works for Debian, after all.



From michael at jedimindworks.com  Thu Mar 22 14:33:08 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Thu, 22 Mar 2007 13:33:08 -0500
Subject: [JOB] Sr. Python Developer, Northern VA
In-Reply-To: <etul70$l3b$1@news4.zwoll1.ov.home.nl>
References: <mailman.5428.1174517933.32031.python-list@python.org>	<ettgei$rki$1@news2.zwoll1.ov.home.nl>	<mailman.5446.1174557039.32031.python-list@python.org>	<ettk02$6kc$1@news1.zwoll1.ov.home.nl>	<mailman.5460.1174570842.32031.python-list@python.org>	<etui34$24l$1@news4.zwoll1.ov.home.nl>
	<mailman.5471.1174584477.32031.python-list@python.org>
	<etul70$l3b$1@news4.zwoll1.ov.home.nl>
Message-ID: <3E59DA6C-C27E-4A13-B2DB-B8BC527DB961@jedimindworks.com>


On Mar 22, 2007, at 1:00 PM, Anton Vredegoor wrote:

> So HRM people keep asking questions like 'But
> what have you been doing?' In the end I just started my own  
> company, and
> while I'm not always employed as a freelancer I can at least now  
> say I'm
> running my own business.

Yeah, I've decided to stay out of the statutory employee role myself  
-- and my resume looks fine.

Or at least it looks good up until the time I made that decision ;-)

I'm doing just fine with freelance work. I work when I want and I  
don't have to deal with people who think they can judge my ability to  
accomplish a goal by asking "how much X do you have?" (where X is  
some skill, language, toolkit, whatever)  That "how much X do you  
have" question always made me grit my teeth.

obtw, thanks for my new signature :-)

-Michael
---
Asking a person who he *is* ... is not Pythonic!  --Anton Vredegoor






From gagsl-py2 at yahoo.com.ar  Tue Mar 20 10:43:16 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 20 Mar 2007 11:43:16 -0300
Subject: Still the __new__ hell ...
References: <1174167360.522350@jubilee.claranet.pt>
	<568s5gF287c68U2@mid.individual.net>
	<mailman.5315.1174359956.32031.python-list@python.org>
	<1hv8x6v.1x0ceur1nnwi46N%aleax@mac.com>
	<etomre$9sg$1@panix3.panix.com>
Message-ID: <op.tphsiepux6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 20 Mar 2007 10:16:30 -0300, Aahz <aahz at pythoncraft.com> escribi?:

> In article <1hv8x6v.1x0ceur1nnwi46N%aleax at mac.com>,
> Alex Martelli <aleax at mac.com> wrote:
>> Steve Holden <steve at holdenweb.com> wrote:
>>>
>>> basestring is a *type*.
>>
>> I believe it used to be a tuple back in Python 2.2 (sorry, don't have a
>> Python 2.2 installation to check this right now).
>
> Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> basestring
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> NameError: name 'basestring' is not defined

On 2.2 it appeared types.StringTypes == (str,unicode)

-- 
Gabriel Genellina



From kushal.kumaran at gmail.com  Sat Mar 31 00:42:03 2007
From: kushal.kumaran at gmail.com (Kushal Kumaran)
Date: 30 Mar 2007 21:42:03 -0700
Subject: loading a url using urllib2
In-Reply-To: <1175307712.978223.225180@n76g2000hsh.googlegroups.com>
References: <1175307712.978223.225180@n76g2000hsh.googlegroups.com>
Message-ID: <1175316123.654517.13470@b75g2000hsg.googlegroups.com>

On Mar 31, 7:21 am, "ying... at gmail.com" <ying... at gmail.com> wrote:
> I have the following code to load a url (address).
>
> When I have a url like this,
>
> http://www.testcom.co.uk/dev_12345/www.cnn.com
>
> i get an error "Failed to openhttp://www.testcom.co.uk/dev_12345/www.cnn.com".
> Is there something wrong with my URL? or something wrong with my code?
>

With the URL.
See http://www.dnsstuff.com/tools/dnsreport.ch?domain=www.testcom.co.uk

> Thank you for any help.
>
> cj = cookielib.LWPCookieJar()
>
>   opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
>     urllib2.install_opener(opener)
>
>     txheaders = {'User-agent': 'Mozilla/4.0 (compatible; MSIE 5.5;
> Windows NT)'}
>     try:
>         print "address", address
>         print "txdata", txdata
>         print "txheaders", txheaders
>         req = Request(address, txdata, txheaders)
>         handle = urlopen(req)

I suppose you've added the appropriate imports for Request and
urlopen.

>     except IOError, e:
>         print address
>         print 'Failed to open %s' % address
>         data = ""

--
Kushal



From gagsl-py2 at yahoo.com.ar  Fri Mar 23 18:51:42 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Fri, 23 Mar 2007 19:51:42 -0300
Subject: fine grain logging cotrol
References: <mailman.5451.1174567188.32031.python-list@python.org>
	<etu19j$nqi$03$1@news.t-online.com>
	<mailman.5464.1174579174.32031.python-list@python.org>
	<etuvoj$pqs$03$1@news.t-online.com>
	<etvvij$7h3$01$1@news.t-online.com>
	<mailman.5519.1174663861.32031.python-list@python.org>
	<eu12qc$1n5$00$1@news.t-online.com> <eu1kls$og8$1@sea.gmane.org>
Message-ID: <op.tpny4gmex6zn5v@furufufa-ec0e13.cpe.telecentro.com.ar>

En Fri, 23 Mar 2007 19:34:31 -0300, Eric S. Johansson <esj at harvee.org>  
escribi?:

> class LoggedType(type):
>      def __new__(mcl, name, bases, classdict):
>          def get_logger(self):
>              tag = "%s.%s" % (name,sys._getframe(1).f_code.co_name)
>              lgr = logging.getLogger(tag)
>              lgr.addFilter(filter_test)
>              return lgr
>
>          classdict["_%s__logger" % name] = property(get_logger)
>          return type.__new__(mcl, name, bases, classdict)
>
> It's probably real obvious but I keep getting a:
>
>    File "C:\Python24\lib\logging\__init__.py", line 539, in filter
>      if not f.filter(record):
> TypeError: unbound method filter() must be called with filter_test
> instance as first argument (got LogRecord instance instead)

I don't get all the details of what's all that stuff for, but from the  
error and traceback, I think you forgot to create the filter_test  
instance. That is, change lgr.addFilter(filter_test) to  
lgr.addFilter(filter_test())

-- 
Gabriel Genellina



From theller at ctypes.org  Sat Mar 10 11:50:17 2007
From: theller at ctypes.org (Thomas Heller)
Date: Sat, 10 Mar 2007 17:50:17 +0100
Subject: C++ and Python
In-Reply-To: <1hur1j5.z48dc31e9f268N%aleax@mac.com>
References: <1173420288.646573.327340@h3g2000cwc.googlegroups.com>	<slrnev2q3q.cis.mandus@oro.simula.no>
	<d2fIh.4$iC.1@newsfe22.lga>	<mailman.4872.1173474874.32031.python-list@python.org>	<2iqIh.2485$_R.1335@newsfe23.lga>
	<1hur1j5.z48dc31e9f268N%aleax@mac.com>
Message-ID: <esunk8$nfo$1@sea.gmane.org>

Alex Martelli schrieb:
> hg <hg at nospam.org> wrote:
>    ...
>> target but rather C: I need to integrate a printer driver and and would
>> like if possible to avoid all of the .h stuff involved with SWIG (I am not
>> being sarcastic): if I can setup my prototypes directly in python, why go
>> through an extra layer ?
>> 
>> Aren't ctypes better suited to such an application ?
> 
> One advantage of solutions generating C code that gets compiled (SWIG,
> Pyrex, writing C-API code directly, etc) is that the C compiler can warn
> you, or produce compile-time mistakes, for many kinds of programming
> errors; with ctypes, you will instead be finding every such error at
> runtime, each time by noticing that Python crashed and facing a
> substantial amount of debugging and code inspection to find out why.

In principle this is true, some points however I would like to point out:

- The ctypes codegenerator, based on GCCXML, is in a pretty good shape.
  A lot of boilerplate (Python) code can be generated automatically.
  The codegenerator is available from CVS, with 'easy_install ctypeslib'.
  GCCXML has to be installed separately.

- Not always does Python crash on programming errors.  On windows, calls
  to foreign functions are 'protected' by windows structured exception
  handling.  In other words, most of the time you get a Python traceback
  instead of a segfault.

- There are some large libraries and also smaller ones that are already
  wrapped with ctypes.  PyOpenGL is probably the most promiment example,
  comtypes (although still in heavy development) another one.

As the ctypes author I'm of course biased.

Thomas



From nagle at animats.com  Mon Mar 19 02:49:27 2007
From: nagle at animats.com (John Nagle)
Date: Mon, 19 Mar 2007 06:49:27 GMT
Subject: Documentation for "str()" could use some adjustment.
Message-ID: <XnqLh.10046$M65.6527@newssvr21.news.prodigy.net>

The Python documentation for "str" says
"str([object]) :
     Return a string containing a nicely printable representation of an object."

However, there's no mention of the fact that "str" of a Unicode string
with non-ASCII characters will raise a conversion exception.  The
documentation (and several Python books) seem to indicate that "str" will
produce some "printable representation" for anything, not raise an exception.

I know, it was proposed in PEP 349 to change "str" to return Unicode
strings, and that's coming someday, along with all-Unicode Python,
but meanwhile, the documentation should be clear about this.

				John Nagle


From pythoneiro at gmail.com  Sat Mar 31 22:15:27 2007
From: pythoneiro at gmail.com (pythoneiro at gmail.com)
Date: 31 Mar 2007 19:15:27 -0700
Subject: CRC CCITT UPDATE in Python
Message-ID: <1175393727.233247.254500@n76g2000hsh.googlegroups.com>

Please,

      Please, is there here some good soul that understand this
functions hi8 and lo8 (from GCC AVR) and can help me to port it to
Python?

uint16_t
crc_ccitt_update (uint16_t crc, uint8_t data)
{
   data ?= lo8 (crc);
   data ?= data << 4;
   return ((((uint16_t)data << 8) | hi8 (crc)) ? (uint8_t)(data >> 4)
? ((uint16_t)data << 3));
}

Source: http://tldp.tuxhilfe.de/linuxfocus/common/src2/article352/avr-libc-user-manual-1.0.4.pdf

     Reason, I would like to code in Python one simulator from one
code C++ AVR

Thanks.,

./F?  -Py -Thorneiro



From tom.rectenwald at eglow.net  Sun Mar 18 18:10:46 2007
From: tom.rectenwald at eglow.net (tereglow)
Date: 18 Mar 2007 15:10:46 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <1huzlrm.1scmekr1val8sbN%aleax@mac.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<1huzlrm.1scmekr1val8sbN%aleax@mac.com>
Message-ID: <1174255846.721961.108370@e1g2000hsg.googlegroups.com>

On Mar 15, 1:47 am, a... at mac.com (Alex Martelli) wrote:
> tereglow <tom.rectenw... at eglow.net> wrote:
>
>    ...
>
> > server using the /proc FS.  For example, in order to obtain the amount
> > of physical memory on the server, I would do the following in shell:
>
> >grep^MemTotal /proc/meminfo | awk '{print $2}'
>
> If you would indeed do that, maybe it's also worth learning something
> more about the capabilities of your "existing" tools, since
>
>   awk '/^MemTotal/ {print $2}' /proc/meminfo
>
> is a more compact and faster way to perform exactly the same task.
>
> (You already received a ton of good responses about doing this in
> Python, but the "pipegrepinto awk instead of USING awk properly in the
> first place!" issue has been a pet peeve of mine for almost 30 years
> now, and you know what they say about old dogs + new tricks!-).
>
> Alex

I had no idea you could do that.  Thanks for the tip, I need to start
reading that awk/sed book collecting dust on my shelf!




From dan.shechter at gmail.com  Thu Mar 15 09:42:13 2007
From: dan.shechter at gmail.com (dan.shechter at gmail.com)
Date: 15 Mar 2007 06:42:13 -0700
Subject: ANN: ActivePython 2.5.0.0 is now available
In-Reply-To: <mailman.5030.1173815941.32031.python-list@python.org>
References: <mailman.5030.1173815941.32031.python-list@python.org>
Message-ID: <1173966133.061395.219360@n76g2000hsh.googlegroups.com>

On Mar 13, 9:56 pm, Trent Mick <tre... at activestate.com> wrote:
> I'm happy to announce that ActivePython 2.5.0.0 is now available for download
> from:
>      http://www.activestate.com/products/activepython/
>
> This is the first release of ActivePython for Python version 2.5. Apologies
> for the long delay between core Python 2.5 and this release. The good news is
> that part of the reason for this delay was to finally get approval to include
> crypto in ActivePython, hence:
>
> Changes in this release include:
> - Full OpenSSL support (finally!)
> - Update to Python 2.5 (duh)
> - [Mac OS X] Universal build (finally!)
> - [Windows] Update to PyWin32 build 210
> - All the new standard extensions: SQLite,ctypes, ElementTree
> - [Linux] Rationalized the build names.
> - [Mac OS X] A sane uninstall script
>
> See the release notes for full details:http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/relnotes.html
>
> What is ActivePython?
> ---------------------
>
> ActivePython is ActiveState's binary distribution of Python. Builds for
> Windows, Mac OS X, Linux, HP-UX and AIX are made freely available.
>
> ActivePython includes the Python core and the many core extensions: zlib and
> bzip2 for data compression, the Berkeley DB (bsddb) and SQLite (sqlite3)
> database libraries, the Tix GUI widgets for Tkinter, ElementTree for XML
> processing,ctypes(on supported platforms) for low-level library access, and
> others. The Windows distribution ships with PyWin32 -- a suite of Windows
> tools developed by Mark Hammond, including bindings to the Win32 API and
> Windows COM. See this page for full details:http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/whatsincluded....
>
> As well, ActivePython ships with a wealth of documentation for both new and
> experienced Python programmers. In addition to the core Python docs,
> ActivePython includes the "What's New in Python" series, "Dive into Python",
> the Python FAQs & HOWTOs, and the Python Enhancement Proposals (PEPs).
>
> An online version of the docs can be found here:
>      http://aspn.activestate.com/ASPN/docs/ActivePython/2.5/welcome.html
>
> We would welcome any and all feedback to:
>      ActivePython-feedb... at activestate.com.com
>
> Please file bugs against ActivePython at:
>      http://bugs.activestate.com/query.cgi?set_product=ActivePython
>
> On what platforms does ActivePython run?
> ----------------------------------------
>
> ActivePython includes installers for the following platforms:
>
> - AIX/PowerPC
> - HP-UX/PA-RISC
> - Linux/x86
> - Linux/x86_64: "x86_64" is also known as "AMD64"
> - Solaris/SPARC
> - Solaris/x86
> - Mac OS X
> - Windows/x64: "x64" is also known as "AMD64"
> - Windows/x86
>
> Extra Bits
> ----------
>
> ActivePython releases also include the following:
>
> - ActivePython25.chm: An MS compiled help collection of the full
>    ActivePython documentation set. Linux users of applications such as
>    xCHM might find this useful. This package is installed by default on
>    Windows.
>
> Extra bits are available from:
>      http://downloads.activestate.com/ActivePython/etc/
>
> Thanks, and enjoy!
>
> Trent, Python Tech Lead
>
> --
> Trent Mick
> trentm at activestate.com

is ctypes supported on ActivePython for Windows x64?



From anton.vredegoor at gmail.com  Wed Mar 28 16:19:01 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Wed, 28 Mar 2007 22:19:01 +0200
Subject: Hpw make lists that are easy to sort.
In-Reply-To: <7xbqidgqy0.fsf@ruckus.brouhaha.com>
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>
	<7xbqidgqy0.fsf@ruckus.brouhaha.com>
Message-ID: <euenlj$oll$1@news4.zwoll1.ov.home.nl>

Paul Rubin wrote:

> Well there are various hacks one can think of, but is there an actual
> application you have in mind?

Suppose both input lists are sorted. Then the product list is still not 
  sorted but it's also not completely unsorted. How can I sort the 
product? I want to know if it is necessary to compute the complete 
product list first in order to sort it. Is it possible to generate the 
items in sorted order using only a small stack?

Also, I have a sumfour script that is slow because of sorting. It would 
become competitive to the hashing solution if the sorting would be about 
ten times faster. If the items could be generated directly in order the 
script would also have only a very small memory footprint.

> If you really want the sum of several probability distriutions (in
> this case it's the sum of several copies of the uniform distribution),
> it's the convolution of the distributions being summed.  You can do
> that with the fast fourier transform much more efficiently than
> grinding out that cartesian product.  But I don't know if that's
> anything like what you're trying to do.

I want the product, but sorted in less time. If Fourier transforms can 
help, I want them :-)

A.


From anton.vredegoor at gmail.com  Sat Mar 31 03:56:02 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Sat, 31 Mar 2007 09:56:02 +0200
Subject: Hpw make lists that are easy to sort.
In-Reply-To: <7xtzw2xalx.fsf@ruckus.brouhaha.com>
References: <eue7lg$3ce$1@news2.zwoll1.ov.home.nl>
	<7xbqidgqy0.fsf@ruckus.brouhaha.com>
	<euenlj$oll$1@news4.zwoll1.ov.home.nl>
	<7xtzw2xalx.fsf@ruckus.brouhaha.com>
Message-ID: <eul467$tg0$1@news6.zwoll1.ov.home.nl>

Paul Rubin wrote:

> Oh, I see what you mean.  I don't see an obvious faster way to do it
> and I don't have the feeling that one necessarily exists.  As someone
> mentioned, you could do an n-way merge, which at least avoids using
> quadratic memory.  Here's a version using Frederik Lundh's trick of
> representing a lazy list as its head plus the generator for the tail:

That's a beautiful trick! I was just exploring some idea about 
traversing the matrix starting from the upper left and ending at the 
lower right by forming some kind of wave like front line. It's currently 
very slow but I hope it can be polished a bit.

Also I was trying to figure out if it could have any advantage over the 
straight row by row merge, but now that these lazy rows have appeared 
the field has changed a lot :-)

def typewriter(L,R):
     Z = [0] * len(R)
     M = [(L[0]+R[0],0)]
     while M:
         val,k = min(M)
         yield val
         Z[k] += 1
         M = []
         for k,x in enumerate(Z):
             if x < len(R):
                 M.append((L[k]+R[x],k))
             if not x:
                 break

A.


From steve at holdenweb.com  Wed Mar 14 14:25:44 2007
From: steve at holdenweb.com (Steve Holden)
Date: Wed, 14 Mar 2007 14:25:44 -0400
Subject: Python & Oracle
In-Reply-To: <et9d8r$vga$1@sea.gmane.org>
References: <et9d8r$vga$1@sea.gmane.org>
Message-ID: <et9epv$3uq$2@sea.gmane.org>

Facundo Batista wrote:
> Hi! I need to connect to Oracle.
> 
> I found this binding,
> 
>   http://www.zope.org/Members/matt/dco2
> 
> that is the recommended in the Python page.
> 
> But that page seems a bit confuse to me. In the upper right corner says
> that the last release is PreRelease 1, from 2001-11-15.
> 
> At the bottom, however, it says that 1.3 beta was released 2003-02-10,
> and is a development version (the last stable is 1.2, from 2002-10-02),
> four and a half years ago.
> 
> The question is: is this connector the recommended one? it's aged
> because it's stable and no more changes are necessary, or it just dead?
> Works Ok?
> 
> Thank you!! Regards,
> 
Most serious Oracle users (even Zope customers) now use Computronix' 
cxOracle module. I think the DB SIG pages need some updating. They are 
badly organized and out of date, in common with other SIGs' pages.

regards
  Steve
-- 
Steve Holden       +44 150 684 7255  +1 800 494 3119
Holden Web LLC/Ltd          http://www.holdenweb.com
Skype: holdenweb     http://del.icio.us/steve.holden
Blog of Note:          http://holdenweb.blogspot.com
See you at PyCon?         http://us.pycon.org/TX2007



From bdesth.quelquechose at free.quelquepart.fr  Sun Mar  4 16:22:46 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Sun, 04 Mar 2007 22:22:46 +0100
Subject: Perl and Python, a practical side-by-side example.
In-Reply-To: <54sl5dF21mn73U1@mid.individual.net>
References: <mailman.4614.1172875489.32031.python-list@python.org>
	<45e8c931$0$8646$426a34cc@news.free.fr>
	<54sl5dF21mn73U1@mid.individual.net>
Message-ID: <45eb30b4$0$22737$426a74cc@news.free.fr>

Bjoern Schliessmann a ?crit :
> Bruno Desthuilliers wrote:
> 
>>Shawn Milo a ?crit :
> 
> 
>>>    if recs.has_key(piid) is False:
>>
>>'is' is the identity operator - practically, in CPython, it
>>compares memory addresses. You *dont* want to use it here.
> 
> 
> It's recommended to use "is None"; why not "is False"? Are there
> multiple False instances or is False generated somehow?

Once upon a time, Python didn't have a "proper" boolean type. It only 
had rules for boolean evaluation of a given object. According to these 
rules - that of course still apply -, empty strings, lists, tuples or 
dicts, numeric zeros and None are false in a boolean context. IOW, an 
expression can eval to false without actually being the False object 
itself. So the result of using the identity operator to test against 
such an expression, while being clearly defined, may not be exactly what 
you'd think.

To make a long story short:

if not []:
   print "the empty list evals to false in a boolean context"

if [] is False:
   print "this python interpreter is broken"

HTH


From gagsl-py2 at yahoo.com.ar  Tue Mar 27 11:14:00 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Tue, 27 Mar 2007 12:14:00 -0300
Subject: about second parameter of signal handler func.
References: <mailman.5647.1174960713.32031.python-list@python.org>
	<56ronoF2a9a19U1@mid.individual.net>
Message-ID: <op.tpuslmj1x6zn5v@gabriel2.softlabbsas.com.ar>

En Tue, 27 Mar 2007 02:34:48 -0300, Bjoern Schliessmann  
<usenet-mail-0306.20.chr0n0ss at spamgourmet.com> escribi?:

>> In C, a signal handler function has only one parameter, that is
>> signal number. But in Python(import signal), a signal handler
>> function has two parameters, the first is signal number, the
>> second is "frame"?
>>
>> What is "frame", please?
>
> Did you bother using help()?

The help text is of little help if you don't know what is it talking  
about...

The Python signal handler has additional information: you know *what* was  
being executed when the signal was caught (or nearly).
A little example:


import signal

def babies(n):
     if n<=1: return 1
     return adults(n-1)

def adults(n):
     if n<=1: return 0
     return adults(n-1)+babies(n-1)

def fibom(n):
     return adults(n)+babies(n)

def handler(signum, frame):
     print "At",frame.f_code.co_name, "in", frame.f_code.co_filename,  
"line", frame.f_lineno

# Press CTRL-C to see what's being executed
signal.signal(signal.SIGINT, handler)
for n in range(50):
     print n, fibom(n)

-- 
Gabriel Genellina



From flgoms at hotmail.com  Mon Mar 12 11:08:18 2007
From: flgoms at hotmail.com (Fabio Gomes)
Date: Mon, 12 Mar 2007 18:08:18 +0300
Subject: backslashes in lists
Message-ID: <BAY126-W6DD4F050FEF6036835FEFD37D0@phx.gbl>


Yes, Luca.  I noticed that printing the list item will show the string as expected. But I need to print the entire list in the script I'm writing and doing that, the list will will be repr()'ed. Is there any way to print the entire list without being parsed by repr()?
 Date: Mon, 12 Mar 2007 12:00:19 -0300From: lucastorri at gmail.comTo: flgoms at hotmail.comSubject: Re: backslashes in listsCC: python-list at python.orgThe backslash is a key to enter especial characters, like breakline: '\n'There is two backslashes cause of this especial condition of this char, but if you try print the specific string you will see that only one backslash remain:
print alist[2]On 3/12/07, Fabio Gomes <flgoms at hotmail.com> wrote:





Hi list,  I'm trying to use a string with backslashes in a list. But Python parses strings in lists with repr().>>> alist = ['a', 'b', 'c:\some\path']>>> alist
['a', 'b', 'c:\\some\\path']>>> print alist['a', 'b', 'c:\\some\\path']  I already tried str() and raw (r) but it didn't work. All I want is to keep a single backslash in the string since it is a path information.
  Can anyone help me, please?  Thank you.O Windows Live Spaces est? aqui! Descubra como ? f?cil criar seu espa?o na Web e sua rede amigos. 
Confira!
--http://mail.python.org/mailman/listinfo/python-list


_________________________________________________________________
Busque em qualquer p?gina da Web com alta prote??o. Obtenha o Windows Live Toolbar GRATUITO ainda hoje!
http://toolbar.live.com/
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From ben+openid at benfinney.id.au  Wed Mar 28 00:13:43 2007
From: ben+openid at benfinney.id.au (Ben Finney)
Date: Wed, 28 Mar 2007 14:13:43 +1000
Subject: ANN: Gracie v0.2 -- a local-account OpenID provider
Message-ID: <87k5x2knt4.fsf@benfinney.id.au>

Howdy all,

I'm pleased to announce the creation of the Gracie project.

What is Gracie?
===============

Gracie is an OpenID server (a "provider" in OpenID terminology) that 
serves OpenID identities for the local system PAM accounts. It 
authenticates users with a username/password challenge.

The OpenID protocol is documented at <URL:http://openid.net/>.

Gracie is intended for use within trusted environments that have an 
existing authentication system available via PAM (e.g. most GNU/Linux 
environments), that would like to provide OpenIDs for all local users 
instead of maintaining disparate web-based accounts for local 
services.

What can Gracie do now?
=======================

Gracie 0.2 is still alpha-development software, not intended for use 
in production environments. That said, this version does satisfy some 
basic requirements.

Currently Gracie can serve OpenID 1.1 authentication for local PAM 
users. It will authenticate the user with a web form, using the PAM 
system where the Gracie server is running. It assumes that any 
consumer request for identity is authorised to be given the user's 
identity.

What improvements are needed?
=============================

The current state of Gracie is functional but still needs much 
improvement. Please check the TODO.txt file in the source package for 
a list of improvements that need to be made.


As of this announcement, Gracie version 0.2 is available.

The project's home page is <URL:http://trac.whitetree.org/gracie/>.

-- 
 \     "When I turned two I was really anxious, because I'd doubled my |
  `\   age in a year. I thought, if this keeps up, by the time I'm six |
_o__)                               I'll be ninety."  -- Steven Wright |
Ben Finney <ben at benfinney.id.au>


From godzillaismad at gmail.com  Thu Mar 22 05:21:35 2007
From: godzillaismad at gmail.com (Godzilla)
Date: 22 Mar 2007 02:21:35 -0700
Subject: Python Oracle 10g odbc blob insertion problem
Message-ID: <1174555295.324787.220700@n76g2000hsh.googlegroups.com>

Dear all,

I cannot find a solution for my problem with inserting a blob object
(>4000 in length) into an ORACLE database via ODBC.


I have tried the two ways of inserting the blob object (a zip file):


1)
fp = open("c:/test/test.zip", "r+b")
data = fp.read()
s = odbc.odbc(cs)
qry = s.cursor()
qry.execute("Insert into tBlob (data) values ('%s')" %
data.encode('hex'))


return the error: Input String Too Long Limit: 4096


2)
qry.execute("Insert into tBlob (data) values (?)",
data.encode('hex'))


does not return error, but it does not insert the record correctly.


Any help will be fully appreciated...



From wescpy at gmail.com  Wed Mar 21 02:22:47 2007
From: wescpy at gmail.com (wesley chun)
Date: Tue, 20 Mar 2007 23:22:47 -0700
Subject: difference between urllib2.urlopen and firefox view 'page source'?
Message-ID: <78b3a9580703202322s16a6ccd0mb6e8180eb08f0970@mail.gmail.com>

On Mar 20, 8:33 am, kyoso... at gmail.com wrote:
> On Mar 20, 1:56 am, Tina I <tina... at bestemselv.com> wrote:
> > > I am trying to screen scrape some stock data from yahoo, so I am
> > > trying to use urllib2 to retrieve the html and beautiful soup for the
> > > parsing.
>
> You can do this fairly easily. I found a similar program in the book Core
> PythonProgramming. It actually sticks the stocks into an Excel
> spreadsheet.


i'd like to add that the solution that mike proposes from the book is
an *alternative* to what the OP wanted, which was to parse the actual
stock quote web page.  instead of doing that, the code snippet
actually uses Yahoo!'s CSV interface which you can read more about
from their help pages:

http://search.cc.yahoo.com/search?property=finance&question_box=csv

if the data is all that's important to you, then this is a good proxy
for what you proposed, and will be simpler to implement.  however, if
you're looking for a screen-scraping and HTML-parsing exercise, i'd
stick with your original idea and use the generic output that you get.
 as a previous poster has already mentioned, it's probably the
"cleanest" output, filtering out some of the extra browser-specific JS
and stuff that you don't need.

cheers,
-wesley

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
"Core Python Programming", Prentice Hall, (c)2007,2001
    http://corepython.com

wesley.j.chun :: wescpy-at-gmail.com
python training and technical consulting
cyberweb.consulting : silicon valley, ca
http://cyberwebconsulting.com


From bearophileHUGS at lycos.com  Sat Mar 31 09:13:46 2007
From: bearophileHUGS at lycos.com (bearophileHUGS at lycos.com)
Date: 31 Mar 2007 06:13:46 -0700
Subject: Sorting a multidimensional array by multiple keys
In-Reply-To: <pan.2007.03.31.12.43.14@no.spam.plz>
References: <pan.2007.03.31.12.43.14@no.spam.plz>
Message-ID: <1175346825.986685.42430@b75g2000hsg.googlegroups.com>

Rehceb Rotkiv:
> can I sort a multidimensional array in Python by multiple sort keys? A
> litte code sample would be nice!

If you want a good answer you have to give me/us more details, and an
example too.

Bye,
bearophile



From nogradi at gmail.com  Fri Mar  2 06:36:50 2007
From: nogradi at gmail.com (Daniel Nogradi)
Date: Fri, 2 Mar 2007 12:36:50 +0100
Subject: Writing an interpreter for language similar to python!!
In-Reply-To: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
References: <1172684281.057538.224370@h3g2000cwc.googlegroups.com>
Message-ID: <5f56302b0703020336q7ddd19c8ra12f26b069c83c2@mail.gmail.com>

> I am new to python and working on a project that involves designing a
> new language. The grammar of the language is very much inspired from
> python as in is supports nearly all the statements and expressions
> that are supported by python. Since my project is in initial stage, so
> I think it would be appropriate if I clarify the following questions:
>
> 1. Would it make sense if I parse the whole program from scratch and
> then construct the valid python strings back so that they can be
> executed using ''exec'' and ''eval'' commands?
> 2. Recently, I came across PLY (Python-Lex-Yacc) module that can be
> used to implement interpreters. It seems quite friendly to work with.
> Is there any implementation of python interpreter using ply? Any such
> reference would be extermely helpful for me to continue.
>
> Any kind of suggestions/ comments would be highly appreciated.


You might want to look at the pypy project:

http://codespeak.net/pypy/dist/pypy/doc/news.html

A javascript interpreter has already been written using pypy:

http://codespeak.net/svn/user/santagada/javascript_interpreter_sop.txt


From michael at jedimindworks.com  Mon Mar 26 04:41:47 2007
From: michael at jedimindworks.com (Michael Bentley)
Date: Mon, 26 Mar 2007 03:41:47 -0500
Subject: Sending ECHO_REQUEST (pinging) with python
In-Reply-To: <pan.2007.03.26.06.30.33@gmail.com>
References: <pan.2007.03.26.06.30.33@gmail.com>
Message-ID: <082A1D9B-4200-4F02-B42E-5BA147841540@jedimindworks.com>


On Mar 26, 2007, at 1:30 AM, Thomas Dybdahl Ahle wrote:

>
> It seems however that I have to be root to send those imcp  
> packages, but
> I guess there must be a workaround since I can easily use the "ping"
> command as ordinary user.
>

The workaround your ping command is using btw, is probably running  
suid root.

hth,
Michael

---
Simplicity is the ultimate sophistication.
                                                   -Leonardo da Vinci





From kw at codebykevin.com  Fri Mar 30 16:45:44 2007
From: kw at codebykevin.com (Kevin Walzer)
Date: Fri, 30 Mar 2007 16:45:44 -0400
Subject: [Pythonmac-SIG] MacPython wiki "moved" to Python wiki - now it's
	your turn...
In-Reply-To: <17873.15892.286360.853505@montanaro.dyndns.org>
References: <17873.15892.286360.853505@montanaro.dyndns.org>
Message-ID: <460D76F8.4050601@codebykevin.com>

skip at pobox.com wrote:
> After much wailing and gnashing of teeth the past couple of days, I managed
> to move (most of?) the content from the MacPython wiki to the main Python
> wiki (*).  All pages were created as subpages of
> 
>     http://wiki.python.or/moin/MacPython
> 
> The motivation for this rather hasty move was that the MacPython wiki was
> running an ancient version of MoinMoin and got spammed heavily.  Because of
> its age and vulnerability it was simply too hard to keep up with all the
> wiki spammers.  So I moved everything.
> 
> I did very little to try and fix up link references.  Moin's subpage
> references have always befuddled me, and many of the page references were
> weirded out to begin with, so there you have it: royal link spaghetti.
> 
> This is where you come in.  You can do any number of things to try to
> identify and fix problems:
> 
>     * Visit http://wiki.python.org/moin/OrphanedPages and see if there are
>       any MacPython/... pages which are orphaned (hint: there are quite a
>       few).  Then see if you can find an incorrect link which should refer
>       to the orphaned page.
> 
>     * Visit the MacPython pages.  Just do a title search for "MacPython" to
>       locate them.  Visit and clean up as appropriate.
> 
>     * Everything got pushed down, even home pages.  One of three things can
>       reasonably be done:
>       1. Move a home page up if there isn't one at the top level.
>       2. Replace an uplevel home page with the MacPython version if the
>          latter is "better".
>       3. Merge the content from the MacPython version into the uplevel home
>          page.
>       Instead of performing #2 and #3 yourself, you might send an email to
>       the person and ask them to do the merge/replace.  In any case, this
>       operation is likely to require some link fiddling.
> 
>     * There may also be non-homepage pages at the top level which should be
>       merged with or replaced by (or replace) the MacPython version.
>       VisualPython comes to mind.  Use your judgement
> 
>     * There are lots of unprotected path references in the content,
>       e.g. /System/Library sitting there looking like a link when it should
>       probably be {{{/System/Library}}}.
> 
>     * There may still be a bit of spam lurking in the pages.  I tried to
>       eliminate all the crap, but I might have missed some.
> 
>     * Many pages could use Category references.  There are lots of pages
>       referring to scripting specific Mac applications, home pages and many
>       code samples.  Adding CategoryMac or CategoryAppScript might be
>       reasonable as well.
> 
>     * Use your WikiImagination.  There are probably lots of other things
>       that can be done.  I think the MacPython wiki had fallen into a bit of
>       disrepair, even if you ignore the spam problem, so a little general
>       TLC would probably help.
> 
> Skip
> 
> (*) Thank goodness for Emacs and Mozex...
> _______________________________________________
> Pythonmac-SIG maillist  -  Pythonmac-SIG at python.org
> http://mail.python.org/mailman/listinfo/pythonmac-sig
> 
> 

I was just looking at the new MacPython pages at the Python wiki--it 
appears nothing has been done with them since Skip moved them over. I'm 
thinking this is a terrific opportunity to bring them up to date: would 
anyone mind if I got started? A lot of this stuff doesn't appear to have 
been touched for three or four years.

Any thoughts about what is most pressing? I have my own interests, and 
I'm not qualified to edit everything, but I'm open to suggestions.

-- 
Kevin Walzer
Code by Kevin
http://www.codebykevin.com


From yinglcs at gmail.com  Thu Mar  8 16:55:07 2007
From: yinglcs at gmail.com (ying lcs)
Date: Thu, 8 Mar 2007 15:55:07 -0600
Subject: What is the best way to upgrade python?
In-Reply-To: <2adc542f0703081331m478b388qe32150541e6b7243@mail.gmail.com>
References: <1173388393.052558.69270@s48g2000cws.googlegroups.com>
	<2adc542f0703081331m478b388qe32150541e6b7243@mail.gmail.com>
Message-ID: <568e62a40703081355s6038cf08x79dbd934d5ccd1d@mail.gmail.com>

On 3/8/07, Sick Monkey <sickcodemonkey at gmail.com> wrote:
> Have you tried to upgrade the current python RPM?
>
> rpm -Uvh ....
>
> You can also build from source.  Once you get Python 2.4 up and running I am
> pretty sure you can do a symbolic link on the python 2.3 application (either
> in /usr/bin or /usr/sbin) and point it to the 2.4 python file.
>


I get '$rpm -Uvh python'
error: open of python failed: no such file or directory

but when I do '$rpm -q python ' , I get python -2.3.4-14.1



> On 8 Mar 2007 13:13:13 -0800, yinglcs at gmail.com <yinglcs at gmail.com > wrote:
> > Hi,
> >
> > i am using red hat enterprise 4. It has python 2.3 installed. What is
> > the best way to upgrade to python 2.4?
> >
> > I think one way is to compile python 2.4 from the source, but I can't
> > remove the old one since when i do 'rpm -e python', i get error like
> > 'failed dependencies'.
> >
> > Thank you for any idea.
> >
> > --
> > http://mail.python.org/mailman/listinfo/python-list
> >
>
>


From bdesth.quelquechose at free.quelquepart.fr  Thu Mar  1 16:53:35 2007
From: bdesth.quelquechose at free.quelquepart.fr (Bruno Desthuilliers)
Date: Thu, 01 Mar 2007 22:53:35 +0100
Subject: design question: no new attributes
In-Reply-To: <xgBFh.4185$854.1692@trnddc04>
References: <8BIEh.1349$QI4.489@trnddc01><mailman.4438.1172534289.32031.python-list@python.org><xnQEh.3928$854.1781@trnddc04><1172561344.290126.191530@h3g2000cwc.googlegroups.com><OV0Fh.4396$tR1.2778@trnddc05><mailman.4475.1172614860.32031.python-list@python.org><3c5Fh.3664$Tg7.2156@trnddc03>
	<mailman.4487.1172628385.32031.python-list@python.org>
	<fMeFh.1995$N63.147@trnddc08>
	<45e60fdc$0$30655$426a34cc@news.free.fr>
	<xgBFh.4185$854.1692@trnddc04>
Message-ID: <45e7438f$0$29410$426a74cc@news.free.fr>

Alan Isaac a ?crit :
> "Bruno Desthuilliers" <bdesth.quelquechose at free.quelquepart.fr> wrote in
> message news:45e60fdc$0$30655$426a34cc at news.free.fr...
> 
>>I don't share your definition of "reasonable". But you should have
>>guessed by now
> 
> 
> My view may be shaped by a different experience.
> I have found dynamic attribute creation convenient
> when doing something "quick and dirty", but I have
> never wanted it as a design feature in a more serious
> project.
> 
> Can you give me an example where design considerations
> make dynamic attribute creation particularly desirable?

Let's consider an imaginary ORM (or it could be an "object-ldap mapper", 
or just any other stuff where it may be useful to have 'smart 
attributes', like Plone's Archetype or FormEncode or...):

class Person(Schema):
    firstname = TextField(empty=False, format=str.capitalize)
    lastname = TextField(empty=False, format=str.upper)
    nickname = TextField(empty=False, format=str.lower, dbfield="login")

p = Person(firstname="joe", lastname="Hacker")

p.firstname
=> "Joe"
p.nickname
=> "joe"

p.fields['firstname'].dbfield
=> 'firstname'

I let you try to write the SchemaType metaclass without dynamically 
adding attributes to either the Person class (remember that classes are 
objects too) and/or the TextField instances...


Let's consider the controller part of a web MVC application. You want to 
manage security in a declarative way.

class PageController(Controller):
   @requires_perm('ViewContent')
   def view(self):
      # code here

   @requires_perm('EditContent'):
   def edit(self):
      # code here

etc...

What do you think this decorator will do ? yes, that's right: annotate 
the action methods with needed perms, so the relevant part of the 
framework can take appropriate action...



As a side note :  in Python, *all* attributes are "dynamically created". 
Class attributes are dynamically added to the class object by it's 
metaclass, instance attributes are dynamically added to the instance, 
usually - but not necessarily - by the __init__ method. Now the __init__ 
method is nothing more than a wrapper around the __init__ function, 
which itself takes the (bare) instance as argument. Writing methods 
within the class statement body makes things clearer, but is by no mean 
mandatory:

class Foo(object):
     pass

def init_foo(foo, name):
     foo.name = name

Foo.__init__ = init_foo


Like a lot of other tools (HOFs, metaclasses, descriptors, generators 
etc), dynamic attribute creation looks mostly like a useless gadget when 
you never used it before - because it's not part of your "mind map", you 
don't naturally use it in your design.

My 2 cents


From mwilson at the-wire.com  Sat Mar 10 11:36:58 2007
From: mwilson at the-wire.com (Mel Wilson)
Date: Sat, 10 Mar 2007 11:36:58 -0500
Subject: number generator
In-Reply-To: <1173454535.382260.33930@j27g2000cwj.googlegroups.com>
References: <1173451441.077648.321270@c51g2000cwc.googlegroups.com>	<7x7itqqxlh.fsf@ruckus.brouhaha.com>	<1173453432.893222.308610@j27g2000cwj.googlegroups.com>
	<1173454535.382260.33930@j27g2000cwj.googlegroups.com>
Message-ID: <esumvm$k6b$1@sea.gmane.org>

Gerard Flanagan wrote:
> On Mar 9, 4:17 pm, "cesco" <fd.calabr... at gmail.com> wrote:
>> On Mar 9, 3:51 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
>>
>>> "cesco" <fd.calabr... at gmail.com> writes:
>>>> I have to generate a list of N random numbers (integer) whose sum is
>>>> equal to M. If, for example, I have to generate 5 random numbers whose
>>>> sum is 50 a possible solution could be [3, 11, 7, 22, 7]. 
> 
> Suppose you have a fixed telegraph pole at N and a fixed telgraph pole
> at M, and you're given 5 more telegraph poles...
> 
That's a good one!  Three-liner.

	Cheers,		Mel.



From bignose+hates-spam at benfinney.id.au  Thu Mar 22 02:54:44 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Thu, 22 Mar 2007 17:54:44 +1100
Subject: copying only recent files from one machine to another
References: <794394.60913.qm@web38815.mail.mud.yahoo.com>
Message-ID: <877it94vkb.fsf@benfinney.id.au>

kadarla kiran kumar <kadarlakiran at yahoo.com> writes:

>   Iam trying to copy files from one machine to another over SFTP
> connection. For that Iam using sftp.get & sftp.put methods.

Don't re-invent this wheel:

    <URL:http://rsync.samba.org/>

-- 
 \         "I think a good gift for the President would be a chocolate |
  `\   revolver. And since he's so busy, you'd probably have to run up |
_o__)           to him real quick and hand it to him."  -- Jack Handey |
Ben Finney



From tom.rectenwald at eglow.net  Wed Mar 14 13:55:33 2007
From: tom.rectenwald at eglow.net (tereglow)
Date: 14 Mar 2007 10:55:33 -0700
Subject: Grep Equivalent for Python
In-Reply-To: <1173890256.024442.138840@e1g2000hsg.googlegroups.com>
References: <1173875870.566931.152380@d57g2000hsg.googlegroups.com>
	<mailman.5076.1173876678.32031.python-list@python.org>
	<et8u0e$k2a$1@news2.u-psud.fr>
	<pan.2007.03.14.15.57.44.398564@gmx.net>
	<1173890256.024442.138840@e1g2000hsg.googlegroups.com>
Message-ID: <1173894933.677887.176140@b75g2000hsg.googlegroups.com>

Okay,

It is now working as follows:

memFile = open('/proc/meminfo')
for line in memFile.readlines():
	if line.startswith("MemTotal"):
		memStr = line.split()
		memTotal = memStr[1]
memFile.close()
print "Memory: " + memTotal + "kB"

I'm learning the whole try, finally exception stuff so will add that
in as well.  Now, I'm trying to figure out the CPU speed.  In shell,
I'd do:

grep "^cpu MHz" /proc/cpuinfo | awk '{print $4}' | head -1

The "head -1" is added because if the server has 2 or more processors,
2 or more lines will result, and I only need data from the first
line.  So, now I'm looking for the equivalent to "head (or tail" in
Python.  Is this a case where I'll need to break down and use the re
module?  No need to give me the answer, a hint in the right direction
would be great though.

Thanks again,
Tom



From laurent.pointal at wanadoo.fr  Fri Mar 23 16:43:27 2007
From: laurent.pointal at wanadoo.fr (Laurent Pointal)
Date: Fri, 23 Mar 2007 21:43:27 +0100
Subject: Create new processes over telnet in XP
References: <1174646834.183920.293420@e1g2000hsg.googlegroups.com>
	<slrnf07lr4.3nr.grahn+nntp@frailea.sa.invalid>
Message-ID: <46043ad8$0$27402$ba4acef3@news.orange.fr>

Jorgen Grahn wrote:

> On 23 Mar 2007 03:47:14 -0700, Godzilla <godzillaismad at gmail.com> wrote:
>> Hello,
>>
>> How do you create/spawn new processes in XP over telnet using python?
>> I.e. I would like to create a new process and have it running in the
>> background...
> 
> Ssh -- or even rsh -- are better choices than telnet for these things.
> For some reason, they are not standard in Windows, though.
> 
>   ssh somewhere some command with arguments
>   rsh somewhere some command with arguments
> 
> compared to
> 
>   telnet somewhere
> 
> and then performing expect-like things (basically simulating
> someone typing "some command with arguments" in the telnet
> session).

+ for an sshd running as a service under XP, look at CopSSH.

+ hope started process doesn't want a GUI... else, look at UltraVNC running
as daemon, and port redirection using ssh.

> 
>> when I terminate the telnet connection, I would what the
>> spawned processes to keep running until I shut it off...
> 
> That's a function of the remote OS; what happens when its terminal
> goes away is not under the control of the client side.

Maybe the process starting job can be done by a Python program running as
Windows service and waiting for requests on a port (or Pyro object or Corba
object...). 
No need for telnet/ssh connection, no logout problem.

Just care of possible security problems :-) 





From steve at REMOVE.THIS.cybersource.com.au  Sun Mar 18 08:06:34 2007
From: steve at REMOVE.THIS.cybersource.com.au (Steven D'Aprano)
Date: Sun, 18 Mar 2007 23:06:34 +1100
Subject: Private data
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
Message-ID: <pan.2007.03.18.12.06.32.760433@REMOVE.THIS.cybersource.com.au>

On Sat, 17 Mar 2007 09:31:01 -0700, Dustan wrote:

> http://dustangroups.googlepages.com/privateattributesinpython
> 
> This is something that I just threw together this morning, after a
> eureka moment. It's a way of creating private class attributes and
> static function variables (I'm not 100% sure if that's the correct
> terminology, but you get what I mean). I haven't tried to create
> private instance attributes, mainly because it would just be too
> difficult, and it would be awful syntax. I'm not considering actually
> using this, but I do have a couple questions about it.
> 
> 1. Has anyone else ever come up with something like this? I can't
> imagine I'm the only person who's ever thought of this.

I've never seen anything like this before, but then I haven't gone looking
for anything like this.



> 2. Is it possible to hack into something like this? ie, would it be
> possible to see and change these variables from client code (assuming
> the data manager has been properly removed from sight, as shown on the
> last line of class block TestPrivateClassAttributes)?

Yes.

First, an example of the code in action.

>>> import PrivateAttributes
>>> obj = PrivateAttributes.TestPrivateClassAttributes()
>>> obj.getNumInstances()
1
>>> another = PrivateAttributes.TestPrivateClassAttributes()
>>> obj.getNumInstances()
2
>>> athird = PrivateAttributes.TestPrivateClassAttributes()
>>> athird.getNumInstances()
3

The getNumInstances method reports the number of instances of the
PrivateAttributes class. There's no obvious class attribute where this
count is being kept:

>>> obj.__class__.__dict__.keys()
['__module__', 'getNumInstances', '__dict__', '__weakref__', '__doc__',
'__init__']


Here's how to hack it, and make it report wrong numbers.

>>> c = obj.getNumInstances.func_closure
>>> c[1].cell_contents.numInstances = -300
>>> 
>>> athird.getNumInstances()
-300
>>> afourth = PrivateAttributes.TestPrivateClassAttributes()
>>> athird.getNumInstances()
-299

So yes, it is absolutely hackable.

Now, I'm hardly a Python guru, but in about fifteen minutes I followed the
trail through the object chain, and found how to hack this. An real guru
would probably do it in three minutes.

I was helped a bit by having the source code. But even without the source
code, I reckon I could have done it in an hour or so, if I was motivated
enough. All the tools you need are a Python interactive session, the dir()
function and the dis module.



-- 
Steven



From tdelaney at avaya.com  Wed Mar 14 17:35:19 2007
From: tdelaney at avaya.com (Delaney, Timothy (Tim))
Date: Thu, 15 Mar 2007 08:35:19 +1100
Subject: Mocking OpenOffice in python?
Message-ID: <2773CAC687FD5F4689F526998C7E4E5FF1ED16@au3010avexu1.global.avaya.com>

"Your father was a hamster, and your mother smelled of elderberry."

Oh - unit testing. <wink>

Tim Delaney


From paolopantaleo at gmail.com  Tue Mar  6 10:39:51 2007
From: paolopantaleo at gmail.com (Paolo Pantaleo)
Date: Tue, 6 Mar 2007 16:39:51 +0100
Subject: Wrong exist status for os.system, os.poepen, etc.
Message-ID: <83e8215e0703060739j3cd924c4o8dc19423e8f49055@mail.gmail.com>

Subject: python2.4: Wrong exist status for os.system, os.poepen, etc.
Package: python2.4
Version: 2.4.4-2
Severity: normal



-- System Information:
Debian Release: 4.0
  APT prefers testing
  APT policy: (800, 'testing'), (70, 'stable'), (60, 'unstable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-k7
Locale: LANG=it_IT.UTF-8, LC_CTYPE=it_IT.UTF-8 (charmap=UTF-8)

I send this to python-list also, so someone can tell if he/she can
(not) reproduce
the same behavior

The os.system() (but all the other funciont with similar behavior) reports
wrong exit status. I can reproduce the bug in the following way

create /tmp/x.c:

#include <stdlib.h>

int main(void){
        exit(20);
}

$ cd /tmp
$ make x

$./x
$echo $?
20

$ python

give the following commands:

>>> import os
>>> os.system("/tmp/x")
5120

the same for

>>> x=os.popen("/tmp/x")
>>> x.read()
''
>>> x.close()
5120


Greetings
PAolo



Versions of packages python2.4 depends on:
ii  libbz2-1.0                  1.0.3-6      high-quality block-sorting file co
ii  libc6                       2.3.6.ds1-10 GNU C Library: Shared libraries
ii  libdb4.4                    4.4.20-8     Berkeley v4.4 Database Libraries [
ii  libncursesw5                5.5-5        Shared libraries for terminal hand
ii  libreadline5                5.2-2        GNU readline and history libraries
ii  libssl0.9.8                 0.9.8c-4     SSL shared libraries
ii  mime-support                3.39-1       MIME files 'mime.types' & 'mailcap
ii  python2.4-minimal           2.4.4-2      A minimal subset of the Python lan

python2.4 recommends no packages.

-- no debconf information


From steve at REMOVEME.cybersource.com.au  Tue Mar 13 22:11:50 2007
From: steve at REMOVEME.cybersource.com.au (Steven D'Aprano)
Date: Wed, 14 Mar 2007 13:11:50 +1100
Subject: how to detect change of list of instances
References: <1173835404.477078.306410@b75g2000hsg.googlegroups.com>
Message-ID: <pan.2007.03.14.02.11.49.934449@REMOVEME.cybersource.com.au>

On Tue, 13 Mar 2007 18:23:24 -0700, manstey wrote:

> how do I detect a change in a list of class instances?
> 
> from copy import deepcopy
> 
> class CaListOfObj(list):
>     """ subclass of list """
>     def __init__(self, *args, **kwargs):
>         list.__init__(self, *args, **kwargs)
> 
> class CaClass(object):
>     pass
> 
> class CaData(object):
>     pass

CaData has no equality test defined, so by default equality falls back on
identity tests.


> myclass=CaClass()

myclass is named badly. It isn't a class, it is an instance.



> a=CaData()
> b=CaData()
> c=CaData()
> 
> listInstances = CaListOfObj([a,b,c])
> setattr(myclass,'initlist',listInstances)
> setattr(myclass,'newlist',deepcopy(listInstances))

An easier, more readable, way to do that is just this:

myclass.initlist = listInstances
myclass.newlist = deepcopy(listInstances)



> print myclass.initlist == myclass.newlist
> myclass.newlist.append(c)
> print myclass.initlist == myclass.newlist
> 
> gives
> False
> False
> 
> because deep copies of instances are different instances. what I want
> to do is detect a change between .initlist and .newlist.

You need to define what "equal" means for two different instances of
CaData, otherwise it will fall back on checking to see if they are the
same instance.



-- 
Steven D'Aprano 



From roman.yakovenko at gmail.com  Wed Mar 14 02:11:05 2007
From: roman.yakovenko at gmail.com (Roman Yakovenko)
Date: Wed, 14 Mar 2007 08:11:05 +0200
Subject: python/C++ wrapper
In-Reply-To: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
References: <1173848155.876995.172970@d57g2000hsg.googlegroups.com>
Message-ID: <7465b6170703132311n74a017ffw58ec7a4a406fdc14@mail.gmail.com>

On 13 Mar 2007 21:55:55 -0700, Frank <supervau at gmail.com> wrote:
>
> Hi,
>
> is there anyone here that calls C++ programs from python via swig? It
> seems that there are a lot of different ways to do that. For me it
> would be important that the original c++ code (which is available)
> does not need to be changed and the whole compilation process (swig -
> python.... g++....etc) is as simple as possible.
>
> Does anyone have a running example of the following problem:
>
> - A c++ program receives a 2D-matrix from python as input and gives a
> 2D-matrix as output back to python.
>
> That's all! I would expect there should be someone who actually uses
> swig for this kind of problem. If so, could you send me the code, that
> would be great!

If this is all you need, than may be you don't need to use any code
generator, but try
some other way: Boost.Python. Take a look on tutorials:
http://www.boost.org/libs/python/doc/tutorial/doc/html/python/exposing.html


-- 
Roman Yakovenko
C++ Python language binding
http://www.language-binding.net/


From bernala at gmail.com  Sun Mar 25 09:17:47 2007
From: bernala at gmail.com (Al)
Date: 25 Mar 2007 06:17:47 -0700
Subject: Pycron for windows - please help
In-Reply-To: <mailman.5341.1174402667.32031.python-list@python.org>
References: <1174330804.722975.84900@n59g2000hsh.googlegroups.com>
	<op.tpgjoo2dx6zn5v@gabriel2.softlabbsas.com.ar>
	<mailman.5341.1174402667.32031.python-list@python.org>
Message-ID: <1174828667.754481.216350@e65g2000hsc.googlegroups.com>

Shane,

   I figured it out... Pycron does not work with mapped drives. My
script was supposed to copy files from a mapped drive to a local
folder... I had set up my batch command as copy M:\foldername\*.*,
where M: is a mapped drive pointing to the network share; M: is
defined on the PC running the Pycron service of course. I changed it
to read copy \\servername\shares\foldername\*.* and now everything
works correctly.

Al



From tgrav at mac.com  Tue Mar  6 08:23:08 2007
From: tgrav at mac.com (Tommy Grav)
Date: Tue, 6 Mar 2007 08:23:08 -0500
Subject: Good handling of input data (was Re: Newbie question)
In-Reply-To: <WOdHh.130$c62.86@read3.inet.fi>
References: <mailman.4684.1173113802.32031.python-list@python.org>
	<45EC579A.8090602@websafe.com>
	<mailman.4709.1173178667.32031.python-list@python.org>
	<WOdHh.130$c62.86@read3.inet.fi>
Message-ID: <66D676CF-B9B1-43A3-AA79-FB86C2E0F146@mac.com>


On Mar 6, 2007, at 8:14 AM, Jussi Salmela wrote:

> Tommy Grav kirjoitti:
>> <snip>
>> Thanks for the great response.
>>
>> So how would you handle this type of error handling?
>> My main problem is that occasionally there is an entry
>> in the list that is a string:
>>
>> 0.9834 134.4933 78.009 run11 27
>>
>> Again I would like to avoid having to individually parse the 3  
>> floats,
>> while still easily handling the string, but a list comprehension will
>> not work as far as I can tell. Is there a module that handles this
>> type of flat ascii tables? Something like:
>>
>> (x,y,z,id,n) = ParseFile("float","float","float","string","int")
>>
>> would be great, and I guess
>>
>> (x,y,z,id,n) = PaseFile2("%f %f %f %s %d")
>>
>> would be even better.
>>
>> Cheers
>>   Tommy
>>
>>
>>
>
> Being just on the first step of the ladder of total clairvoyance, I
> can't disambiguate the word "occasionally". I'm assuming that you have
> two types of rows: the ones with 3 floats and the ones with 3  
> floats, a
> string and an integer.
>
> Here's a possible solution:
>
> #=======================================
> conv = {'f':float, 'i':int, 's':str}
> lines = ['0.3434  0.5322 0.3345\n',
>           '0.9834 134.4933 78.009 run11 27\n',
>           '1.3435  2.3345 5.3433\n']
> for line in lines:
>     line = line.split()
>     if len(line) == 3:
>         pat = 'fff'
>         (x, y, z) = [conv[p](x) for p,x in zip(pat, line)]
>         print x, y, z
>         print type(x), type(y), type(z)
>     else:
>         pat = 'fffsi'
>         (x, y, z, s, i) = [conv[p](x) for p,x in zip(pat, line)]
>         print x, y, z, s, i
>         print type(x), type(y), type(z), type(s), type(i)
> #=======================================

I should have been more specific by saying that all the lines in the
file have the same format. But occasionally I will have a file that
is just not all floats, hence my question for handling a multi-type
line. Since I am the one generating the files I always know which
types the columns in the file have which makes it easier :)

Your answer, together with Steven's has given my much better
understanding of the issue of parsing in tables like this. Thanks
to the both of you!

Cheers
   Tommy


From aleax at mac.com  Sat Mar  3 20:54:14 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 17:54:14 -0800
Subject: print a ... z, A ... Z, "\n"' in Python
References: <mailman.4623.1172909667.32031.python-list@python.org>
	<1hue4db.1ifwnsjmhm2pN%aleax@mac.com>
	<Xns98E8944929193rzantowgmailcom@208.49.80.253>
Message-ID: <1huetm4.sryh7b19hjqaxN%aleax@mac.com>

rzed <rzantow at gmail.com> wrote:

> aleax at mac.com (Alex Martelli) wrote in
> news:1hue4db.1ifwnsjmhm2pN%aleax at mac.com: 
> 
> > js  <ebgssth at gmail.com> wrote:
> > 
> >> HI guys,
> >> 
> >> How do you write Perl's
> >> 
> >>     print a ... z, A ... Z,  "\n"' in Python
> >> 
> >> In Python?
> > 
> > This specific one is easy, though this doesn't generalize:
> > 
> > import string
> > print string.lowercase + string.uppercase
> > 
> > For the general case, there's no way to avoid calling chr and
> > ord, because a string in Python doesn't have a "natural
> > successor". So the only issue is how you prefer to hide those
> > calls &c (in some class or function) and you already received
> > suggestions on that. 
> 
> No ord or chr in sight:
> 
> # Inclusive character range. 
> def pycrange(lo,hi):
>     import string
>     chars = string.letters + " "
>     rstr = ''
>     lp = chars.find(lo)
>     hp = chars.find(hi)
>     if lp < hp:    
>         rstr = chars[lp:hp+1]
>     return rstr
> 
> print pycrange('c','n')
> 
> 
> Lame code, though.

Very (the very existence of rstr and the if block are redundant, for
example; "return chars[lp:hp+1]" will already return an empty string
when lp > hp, and it's weird for the result to be empty for equal
arguments lo and hi when it's a length-two string for arguments, say,
'a' and 'b').

Also incorrect, presumably, since it would e.g. consider pycrange('w',
'C') to be 'wxyzABC', rather than empty (as an ord/chr based solution
would) or 'wxyz' (as I believe Perl does for 'w'...'C' -- one of those
black-magical Perl things, unless they've changed it recently) -- in
ASCII, uppercase letters come before lowercase ones, but in
string.letters they're vice versa.

Sure, you can get a complete 256-char ASCII alphabet with
alp=string.maketrans('', ''), use alp.find(x) as roughly equivalent to
ord(x) and alp[y] as roughly equivalent to chr(y), and thus (or by
sillier tricks yet) you wouldn't _formally_ "be calling chr and ord"
(you'd instead use roughly equivalent but slower and murkier idioms).
However, my point was: you can't avoid transforming from characters to
numbers and back again (ord and chr are just the "one obvious way" to do
that -- correct, if you want ASCII, readable, direct, and fast).  .find
and indexing (instead of ord and chr) do give you more flexibility (to
use an underlying order that's not ASCII's) should you need that; and
slicing an appropriate string does avoid an explicit loop.

(Just trying to forestall further silliness...): other ways to avoid
"calling chr and ord" include abusing modules struct and array.


Alex


From gagsl-py2 at yahoo.com.ar  Wed Mar  7 19:24:24 2007
From: gagsl-py2 at yahoo.com.ar (Gabriel Genellina)
Date: Wed, 07 Mar 2007 21:24:24 -0300
Subject: Flatten a two-level list --> one liner?
References: <f1aa6d810703071614r11fd6704h8386403b9a71599d@mail.gmail.com>
Message-ID: <op.tougqyqzx6zn5v@gabriel2.softlabbsas.com.ar>

En Wed, 07 Mar 2007 21:14:43 -0300, Sergio Correia  
<sergio.correia at gmail.com> escribi?:

> I'm looking for an easy way to flatten a two level list like this

Try google.

> PS: Why does `sum` works only with numbers?

Try google.

-- 
Gabriel Genellina



From g.brandl at gmx.net  Wed Mar 28 15:43:32 2007
From: g.brandl at gmx.net (Georg Brandl)
Date: Wed, 28 Mar 2007 21:43:32 +0200
Subject: Question about extending tuple
In-Reply-To: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>
References: <1175110340.415385.58340@e65g2000hsc.googlegroups.com>
Message-ID: <euegh4$kaq$1@sea.gmane.org>

abcd schrieb:
> I wanted to extend tuple but ran into a problem.  Here is what I
> thought would work
> 
> class MyTuple(tuple):
>     def __init__(self, *args):
>         tuple.__init__(self, args)
> 
> x = MyTuple(1,2,3,4)
> 
> That gives me...
> 
> TypeError: tuple() takes at most 1 argument (4 given).
> 
> However, this call works:
> 
> x = MyTuple((1,2,3,4))
> 
> I am perplexed only because "args" is a tuple by the definition of
> *args.  Anyone?

As an immutable type, tuple makes use of __new__.

class MyTuple(tuple):
     def __new__(cls, *args):
         return tuple.__new__(cls, args)

should work.

Georg



From doug at localhost.localdomain  Tue Mar 20 08:33:24 2007
From: doug at localhost.localdomain (Doug Gray)
Date: Tue, 20 Mar 2007 12:33:24 GMT
Subject: Eureka moments in Python
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <pan.2007.03.20.12.32.52.628725@localhost.localdomain>

On Tue, 13 Mar 2007 18:16:15 +1100, Steven D'Aprano wrote:

> I'd be interested in hearing people's stories of Eureka moments in Python,
> moments where you suddenly realise that some task which seemed like it
> would be hard work was easy with Python.

Mine was the discovery of the pybluez module.

I had been sweating the task of interfacing a bluetooth GPS unit to my
python applicaton. I googled for 'python bluetooth GPS' and found 20 lines
of python code that had the interface up and running before breakfast.
This included the package install with 'yum install pybluez' in Fedora
Core 5.

See:
http://www.robertprice.co.uk/robblog/archive/2007/1/Using_A_Bluetooth_GPS_From_Python.shtml

Doug Gray


From paddy3118 at googlemail.com  Fri Mar 30 12:19:49 2007
From: paddy3118 at googlemail.com (Paddy)
Date: 30 Mar 2007 09:19:49 -0700
Subject: make RE more cleaver to avoid inappropriate :
	sre_constants.error: redefinition of group name
In-Reply-To: <1175258667.190955.158220@y80g2000hsf.googlegroups.com>
References: <1175178128.472167.137970@n76g2000hsh.googlegroups.com>
	<1175206399.602730.174360@r56g2000hsd.googlegroups.com>
	<1175258667.190955.158220@y80g2000hsf.googlegroups.com>
Message-ID: <1175271589.740744.69490@y80g2000hsf.googlegroups.com>

On Mar 30, 1:44 pm, "aspineux" <aspin... at gmail.com> wrote:
> On 30 mar, 00:13, "Paddy" <paddy3... at googlemail.com> wrote:
>
> > On Mar 29, 3:22 pm, "aspineux" <aspin... at gmail.com> wrote:
>
> > > I want to parse
>
> > > 'foo at bare' or '<foot at bar>' and get the email address foo at bar
>
> > > the regex is
>
> > > r'<\w+@\w+>|\w+@\w+'
>
> > > now, I want to give it a name
>
> > > r'<(?P<email>\w+@\w+)>|(?P<email>\w+@\w+)'
>
> > > sre_constants.error: redefinition of group name 'email' as group 2;
> > > was group 1
>
> > > BUT because I use a | , I will get only one group named 'email' !
>
> > > Any comment ?
>
> > > PS: I know the solution for this case is to use  r'(?P<lt><)?(?P<email>
> > > \w+@\w+)(?(lt)>)'
>
> > use two group names, one for each alternate form and if you are not
> > concerned with whichever matched do something like the following:
>
> The problem is the way I create this regex :-)
>
> regex={}
> regex['email']=r'(?P<email1>\w+@\w+)'
>
> path=r'<%(email)s>|%(email)s' % regex
>
> Once more, the original question is :
> Is it normal to get an error when the same id used on both side of a
> |
>
>
>
> > >>> s1 = 'foo at bare'
> > >>> s2 = '<foo at bare>'
> > >>> matchobj = re.search(r'<(?P<email1>\w+@\w+)>|(?P<email2>\w+@\w+)', s1)
> > >>> matchobj.groupdict()['email1'] or matchobj.groupdict()['email2']
> > 'foo at bare'
> > >>> matchobj = re.search(r'<(?P<email1>\w+@\w+)>|(?P<email2>\w+@\w+)', s2)
> > >>> matchobj.groupdict()['email1'] or matchobj.groupdict()['email2']
> > 'foo at bare'
>
> > - Paddy.

Groups are numbered left-to-right irrespective of the expression
contents.
I am quite happy with the names being merely apseudonym for the
positional
group number and don't see a problem with not allowing multiple
occurrences of  the same group name.
I did see some article about RE's and their speed. It seems that if
Pythons
RE package distinguished between 'grep style' RE' and the full set of
Python
RE's then their are much faster and efficient algorithms available for
the
grep style subset.

- Paddy.



From pibizza at gmail.com  Wed Mar 14 10:11:01 2007
From: pibizza at gmail.com (PaoloB)
Date: 14 Mar 2007 07:11:01 -0700
Subject: Mocking OpenOffice in python?
In-Reply-To: <mailman.5080.1173880110.32031.python-list@python.org>
References: <1173861553.036985.74670@p15g2000hsd.googlegroups.com>
	<mailman.5080.1173880110.32031.python-list@python.org>
Message-ID: <1173881461.521198.247250@e65g2000hsc.googlegroups.com>

On 14 Mar, 14:48, Carsten Haese <cars... at uniqsys.com> wrote:
> On Wed, 2007-03-14 at 01:39 -0700, PaoloB wrote:
> > Hi everyone,
>
> > during our development, we need to write some unit tests that interact
> > with OpenOffice through pyUno.
>
> > Is there anyone who has got any experience on it? As OpenOffice is
> > quite a large beast, and interaction is rather complex, I would like
> > to know if there is someone who is willing to share experience (and,
> > possibly, code).
>
> I have some experience with pyuno, but your question is very open-ended.
> It would be helpful if you asked specific questions or gave more
> background on what kind of interaction you're trying to achieve.
>
> The generic answer to your request for code examples is that there's a
> tutorial with example code athttp://udk.openoffice.org/python/python-bridge.html, and then there's
> the API documentation athttp://api.openoffice.org/DevelopersGuide/DevelopersGuide.html.
>
> -Carsten

Hi Carsten,

basically, our project (PAFlow) is an application for producing
documents in public administrations.

We create templates using OpenOffice, that are filled automatically
using data from the application itself.

Now, interacting with OpenOffice is slow, and our tests get a lot of
time to be executed automatically.

We are trying to mock OpenOffice, so that we can run our tests without
using a true OpenOffice for our tests, except when we express test the
filling of data and production of document.

Ciao

PaoloB




From gandalf at designaproduct.biz  Thu Mar 29 16:48:20 2007
From: gandalf at designaproduct.biz (Laszlo Nagy)
Date: Thu, 29 Mar 2007 22:48:20 +0200
Subject: SimpleXMLRPCServer and Threading
In-Reply-To: <82d28c40703281809g3621bca3kd0bda42fc276ecf9@mail.gmail.com>
References: <460acd70$0$20282$9b4e6d93@newsspool3.arcor-online.net>	<460af7ef$1@nntp.zianet.com>
	<82d28c40703281809g3621bca3kd0bda42fc276ecf9@mail.gmail.com>
Message-ID: <460C2614.3090403@designaproduct.biz>

Jeff McNeil wrote:
> This is off of memory so I apologize if I don't get all of the details right.
>
> The base SimpleXMLRPCServer uses TCPServer as it's server component
> and SimpleXMLXMLRPCRequestHandler as it's handler. The handler is a
> subclass of BaseHTTPRequestHandler, which itself doesn't handle any
> multithreading.  You need to use one of the *MixIn classes if you want
> to handle concurrent requests.
>   
Does it mean that, if I subclass from ThreadingMixIn then my exported 
functions will be called from different threads? I created many multi 
threaded servers, based on TCPServer, but I'm not sure about 
XMLRPCServer.  I used to create my own handler class and in that case, a 
new handler instance was created for each request, then a new thread was 
created and handle_request was called from that new thread. I guess that 
in this case, a new SimpleXMLXMLRPCRequestHandler is created for each 
request and a new thread is started.... but I'm not sure. Please help us 
out.

By the way, we should have __server__ examples in the documentation of 
xmlrpclib, right? What is the right way of contributing an example?

Best,

  Laszlo



From aleax at mac.com  Sun Mar 18 20:41:51 2007
From: aleax at mac.com (Alex Martelli)
Date: Sun, 18 Mar 2007 17:41:51 -0700
Subject: Trying to print from inside a method
References: <1174256116.872955.180040@l77g2000hsb.googlegroups.com>
	<1hv6is1.icavxo1xmrwhpN%aleax@mac.com>
	<1174262912.218027.53780@l75g2000hse.googlegroups.com>
Message-ID: <1hv6m5e.16rjd4518osvk7N%aleax@mac.com>

<AWasilenko at gmail.com> wrote:
   ...
> > This would be pretty weird, but legal Python.
> > Weirder and weirder, but still legal Python.
> 
> This is usually how most of my code turns out :(  I'm afraid if I ever
> learn enough
> to make a serious program I will be burned at the stake for such un-
> pythonic practices :P

Function attributes are rarely used, because they belong to "the
function object itself", not to any given _call_ to that function, or to
any _method_ that may wrap that function, and so on.  That's what pretty
weird here -- it would not appear that you necessarily want to associate
those attributes with the function object, and yet (if you want them to
access as attributes of the function object) you do of course need to do
that.  Of course, it's somewhat hard to divine "semantic intent of the
programmer" from a totally abstract toy example, so I could be wrong!


Alex




From anton.vredegoor at gmail.com  Mon Mar 26 05:06:00 2007
From: anton.vredegoor at gmail.com (Anton Vredegoor)
Date: Mon, 26 Mar 2007 11:06:00 +0200
Subject: A better webpage filter
In-Reply-To: <87ps6x2c07.fsf@pobox.com>
References: <eu3rhk$vpi$2@news3.zwoll1.ov.home.nl> <87ps6x2c07.fsf@pobox.com>
Message-ID: <eu82dm$j48$2@news6.zwoll1.ov.home.nl>

John J. Lee wrote:

> http://webcleaner.sourceforge.net/

Thanks, I will look into it sometime. Essentially my problem has been 
solved by switching to opera, but old habits die hard and I find myself 
using Mozilla and my little script more often than would be logical.

Maybe the idea of having a *Python* script open at all times to which 
all content goes through is just too tempting. I mean if there's some 
possible irritation on a site theoretically I could just write a 
specific function to get rid of it. This mental setting works as a 
placebo on my web browsing experience so that the actual problems don't 
always even need  to be solved ... I hope I'm not losing all traditional 
programmers here in this approach :-)

> Not actually tried it myself, though did browse some of the code once
> or twice -- does some clever stuff.
> 
> Lots of other Python-implemented HTTP proxies, some of which are
> relevant (though AFAIK all less sophisticated than webcleaner), are
> listed on Alan Kennedy's nice page here:
> 
> http://xhaus.com/alan/python/proxies.html
> 
> 
> A surprising amount of diversity there.

At least now I know what general category seems to be nearest to my 
solution so thanks again for that. However my solution is not really 
doing anything like the programs on this page (although it is related to 
removing ads), instead it tries to modulate a copy of the page after 
it's been saved on disk. This removes all kinds of links and enables one 
to definitely and finally reshape the form the page will take. As such 
it is more concerned with the metaphysical image the page makes on the 
users brain and less with the actual content or the security aspects.

One thing I noticed though on that (nice!) Alan Kennedy page is that 
there was a script that was so small that it didn't even have a homepage 
but instead it just relied on a google groups post! I guess you can see 
that I liked that one :-)

My filter is even smaller. I've tried to make it smaller still by 
removing the batch file and using webbrowser.open(some cStringIO object) 
but that didn't work on windows.

regards,

A.


From aboudouvas at panafonet.gr  Mon Mar 19 11:17:06 2007
From: aboudouvas at panafonet.gr (king kikapu)
Date: 19 Mar 2007 08:17:06 -0700
Subject: PythonCard thoughts
In-Reply-To: <1174317061.619314.215200@l77g2000hsb.googlegroups.com>
References: <1174306109.635443.88060@y66g2000hsf.googlegroups.com>
	<45fe9b31$0$17946$c3e8da3@news.astraweb.com>
	<1174315460.650400.202270@e1g2000hsg.googlegroups.com>
	<1174317061.619314.215200@l77g2000hsb.googlegroups.com>
Message-ID: <1174317426.395088.58850@p15g2000hsd.googlegroups.com>

> Would you please explain more in detail this "Message Watcher" option?
> I use PythonCard from time to time, and I find it very easy to use and
> practical, even considering the small shortcomings you mentioned
> above, but I have no idea of this feature you're talking about..
>
> Regards,
> Luis

Luis, go to File/Run Options and check the third choice called
"Message Watcher", then run your design.
You will then see that every event that is triggered is displayed to
you and when you actually want to see the event that you interested
in,
you just cause it to happen and then it is displayed on the message
watcher event grid.
You then go to your source file and armed with the known notation
(on_controlName_eventName) you write the code.

I copy from the manual of PythonCard:
"The Message Watcher integrates with the wxPython event model to show
you in real time the events that are being triggered when a PythonCard
application is running. It helps determine where the application code
should go and verify that a PythonCard application is operating as
expected."



From jezonthenet at yahoo.com  Tue Mar 13 16:53:14 2007
From: jezonthenet at yahoo.com (jezzzz .)
Date: Tue, 13 Mar 2007 15:53:14 -0500 (CDT)
Subject: Starting Python... some questions
Message-ID: <255955.30817.qm@web58107.mail.re3.yahoo.com>

All,

thank you for your responses. I learned much and made some modifications in my small program. Currently I am attempting to put together a packet that contains a Python message (created using struct.pack) and a Scapy message (Ether()). Having a packet with combined payload from Python and Scapy doesn't seem to work the way I do it: 
ether = scapy.Ether(dst="01:02:03:04:05:06")
payload = ether + payload (where payload is the chassis_id)

I get as error:
  File "lldp.py", line 23, in main
    fullpayload = ether + payload
TypeError: unsupported operand type(s) for +: 'Ether' and 'str'

I'm thinking instead to just use Python to create the Ethernet Frame as well and then send the packet off. How difficult is this? I could only find references online on how to send TCP/UDP packets but no information on how to send a packet with a Layer1 and Layer2 only. The ethernet frame should only contain a destination MAC, a source MAC and a type (88cc). Any advice on how to create such a packet and send it? (if anyone knows of an easy way to use a hybrid of Python and Scapy, that's fine by me as well).

Thanks!


class lldp_class:
    def __init__(self):
        self.chassis_id_tlv = None
    
    def chassis_id(self, subtype, chassis_info):
        if subtype == 4:
            chassis_data_int = [int(x,16) for x in chassis_info.split(":")]            
            chassis_data = struct.pack("6B", *chassis_data_int)
        subtype_data = struct.pack("!B",subtype)
        self.chassis_id_tlv = subtype_data + chassis_data

def main():
    p = lldp_class()
    p.chassis_id(4, "01:80:C2:00:00:0E")
    payload = p.chassis_id_tlv
    ether = scapy.Ether(dst="01:02:03:04:05:06")
    fullpayload = ether + payload
    sendp(fullpayload)

main()






 
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From tinaweb at bestemselv.com  Wed Mar 28 00:23:11 2007
From: tinaweb at bestemselv.com (Tina I)
Date: Wed, 28 Mar 2007 06:23:11 +0200
Subject: __init__.py
In-Reply-To: <slrnf0hiab.3nr.grahn+nntp@frailea.sa.invalid>
References: <q8ydnRG5jr36-prbRVnzvA@telenor.com>
	<q8ydnRC5jr1a-prbRVnzvA@telenor.com>
	<slrnf0hiab.3nr.grahn+nntp@frailea.sa.invalid>
Message-ID: <R82dnTyFILItcJTbRVnzvA@telenor.com>

Jorgen Grahn wrote:
> On Mon, 26 Mar 2007 08:27:19 +0200, Tina I <tinaweb at bestemselv.com> wrote:
>> Tina I wrote:
>>> When looking at other peoples code (to learn from it) I keep seeing an 
>>> empty file named "__init__.py". What's the purpose of this?
>>>
>>> Thanks
>>> Tina
>> Duh! Never mind... found it.
>> Kinda neat actually :)
> 
> /What/ was neat? It's polite in cases like this to explain what the
> answer or solution was.
> 
> I have never seen an empty __init__.py, and I'd like to know what its
> purpose could be.
> 
> BR,
> /Jorgen
> 
Sorry, it was just that it was so easy to find right there in the 
documentation. I had just missed it the first time around. So I kinda 
assumed that since it was spelled out so well in the doc I was asking a 
very stupid question.
But anyway, it can be found here: 
http://www.python.org/doc/2.1.3/tut/node8.html#SECTION008400000000000000000

Tina


From aleax at mac.com  Sun Mar  4 01:45:45 2007
From: aleax at mac.com (Alex Martelli)
Date: Sat, 3 Mar 2007 22:45:45 -0800
Subject: Non Sequitur
References: <mailman.4633.1172954118.32031.python-list@python.org>
	<1172968335.511875.255750@p10g2000cwp.googlegroups.com>
	<mailman.4638.1172976888.32031.python-list@python.org>
	<1172979629.812957.156820@i80g2000cwc.googlegroups.com>
	<_ftGh.8984$tD2.396@newsread1.news.pas.earthlink.net>
	<mailman.4640.1172990278.32031.python-list@python.org>
Message-ID: <1huf8is.wr3aho2lxiy3N%aleax@mac.com>

Ben Finney <bignose+hates-spam at benfinney.id.au> wrote:

> Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:
> 
> > """
> >     I before E
> >             Except after C
> >     Or when sounded as A
> >             As in Neighbor and Weigh
> > """
> 
> Yes, like the "A" sound in "weird" or "ceiling".

"ceiling" falls under the "except after C" exception.

"weird" is, of course, weird (as most of English)...


Alex


From francois.petitjean at bureauveritas.com  Thu Mar  8 10:12:18 2007
From: francois.petitjean at bureauveritas.com (francois.petitjean at bureauveritas.com)
Date: Thu, 8 Mar 2007 16:12:18 +0100
Subject: Tell me the truth
Message-ID: <OFA0A2DBF6.794F6BB0-ONC1257298.00415F42-C1257298.0053864B@bureauveritas.com>


In the python-ideas mailing list
http://mail.python.org/pipermail/python-ideas/2007-March/thread.html  there
was a discussion about the fact that python has opeartors 'and', 'or' and
'not' (keywords of the language) but 'bool'  is a type. Naturally we have
 (not not x) == bool(x)  # always True
If I take into account the fact that 'True' and 'False' are singletons
(guaranteed ?) :
 (not not x) is bool(x)  # should be always True.

>>> def ok(x):
...     return (not not x) is bool(x)
...
>>> ok(0)
True
>>> ok(False)
True

ok(11) is True
True
Interesting.... Let's make another function:
>>> def foo(x):
...     return (not not x) is bool(x)  is True
...
>>> foo(False)
False
>>> foo(0.0)
False
>>> foo(0.1)
True

To see if the problem comes from using the a is b is True form, let's try
>>> def ok3(x):
...     return (not not x) is bool(x) == True
...
>>> ok3(44)
True
>>> ok3(0)
False

After much head scrating and experimenting with dis.dis() I have found that
chaining comparisons (with is or ==)  a == b == c in Python is never a good
idea. It is interpreted as
 ( a == b ) and ( b == c)
Such a magic is fine  when we write:
 if  0.0 <= x < 1.0:
but it renders the outcome of  if a == b == c: somewhat confusing. In the
reference documentation the sentences """Comparisons can be chained
arbitrarily, e.g., x < y <= z is equivalent to x < y and y <= z, except
that y is evaluated only once (but in both cases z is not evaluated at all
when x < y is found to be false). """ should be followed by a warning about
chaining '==' or similar operators.

Regards

PS. Sorry for bad english.


   NOTICE: This message contains information which is confidential and the
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   de Services.




From mrmakent at cox.net  Fri Mar 23 15:06:58 2007
From: mrmakent at cox.net (Mike Kent)
Date: 23 Mar 2007 12:06:58 -0700
Subject: Join strings - very simple Q.
In-Reply-To: <1174675011.244339@jubilee.claranet.pt>
References: <1174675011.244339@jubilee.claranet.pt>
Message-ID: <1174676818.207543.246080@l75g2000hse.googlegroups.com>

On Mar 23, 2:37 pm, Paulo da Silva <psdasil... at esotericaX.ptX> wrote:
> Hi!
>
> I was told in this NG that string is obsolet. I should use
> str methods.
>
> So, how do I join a list of strings delimited by a given
> char, let's say ','?
>
> Old way:
>
> l=['a','b','c']
> jl=string.join(l,',')
>
> New way?
>
> Thanks
> Paulo

New way:
l=['a','b','c']
jl=','.join(l)



From jgodoy at gmail.com  Mon Mar 19 18:33:23 2007
From: jgodoy at gmail.com (Jorge Godoy)
Date: Mon, 19 Mar 2007 19:33:23 -0300
Subject: SQLObject 0.8.1
References: <mailman.5287.1174323773.32031.python-list@python.org>
	<cN-dnakGPZhzkGLYnZ2dnUVZ_hninZ2d@comcast.com>
Message-ID: <87mz28yibw.fsf@gmail.com>

Larry Bates <lbates at websafe.com> writes:

> WOW!  Went from 0.7.4 to 0.8.1 in the span of only 23 minutes!

There are two branches: 0.7 and 0.8.  So, there were two releases. 

-- 
Jorge Godoy      <jgodoy at gmail.com>


From davidnicolson1 at hotmail.com  Mon Mar 26 23:10:55 2007
From: davidnicolson1 at hotmail.com (David Nicolson)
Date: Tue, 27 Mar 2007 13:10:55 +1000
Subject: shutil.copy Problem
Message-ID: <BAY105-DAV3075775E36892582077D8956E0@phx.gbl>

Hi,

I wasn't exactly sure where to send this, I don't know if it is a bug  
in Python or not. This is rare, but it has occurred a few times and  
seems to be reproducible for those who experience it.

Examine this code:
 >>> try:
 >>>     shutil.copy("/file.xml","/Volumes/External/file.xml")
 >>> except Exception, err:
 >>>     print sys.exc_info()[0]
 >>>     print err

This is the output:
exceptions.UnicodeDecodeError
'ascii' codec can't decode byte 0xd6 in position 26: ordinal not in  
range(128)]

What could the possible cause of this be? Shouldn't shutil simply be  
reading and writing the bytes and not character decoding them?

Cheers,
David




From kay.schluehr at gmx.net  Wed Mar 28 12:41:11 2007
From: kay.schluehr at gmx.net (Kay Schluehr)
Date: 28 Mar 2007 09:41:11 -0700
Subject: PyPy 1.0: JIT compilers for free and more
In-Reply-To: <7xk5x1a147.fsf@ruckus.brouhaha.com>
References: <mailman.5685.1175032114.32031.python-list@python.org>
	<1175083955.167868.88610@n76g2000hsh.googlegroups.com>
	<7xk5x1a147.fsf@ruckus.brouhaha.com>
Message-ID: <1175100071.916330.112200@p15g2000hsd.googlegroups.com>

On Mar 28, 4:34 pm, Paul Rubin <http://phr... at NOSPAM.invalid> wrote:
> "Kay Schluehr" <kay.schlu... at gmx.net> writes:
> > A somewhat unrelated question. With Py3K Python gets optional type
> > annotations. Are you already architecting an annotation handler that
> > can process these annotations? This feature is somewhat competitive to
> > all the complicated type inference and jitting you have been worked
> > out so I don't know how it fits well into the current PyPy
> > architecture?
>
> What's the nature of the conflict between annotations and inference?
> Haskell for example has both.

There is no conflict in Haskell because Haskell has a type system by
default. But Python has none and so one had to define RPython, a
subset of Python *viewed* as static enough to be translatable to C
( RPython is of course as polymorphic as any other Python code and can
be fed with arbitrary types. Only the context makes it special ).
RPython is an approximation to Python on which static type inference
is feasible. RPython is yet defined heuristically and this heuristics
might be changed when RPython can be defined by the power of a type
system defined *formally*. So it might be just a matter of reason to
define a typesystem for interpreter/jit level Python code.



From shahmed at sfwmd.gov  Thu Mar  1 11:32:44 2007
From: shahmed at sfwmd.gov (Ahmed, Shakir)
Date: Thu, 1 Mar 2007 11:32:44 -0500
Subject: GIS Shape file upload FTP server
Message-ID: <14A2A120D369B6469BB154B2D2DC34D206F1EABD@EXCHVS01.ad.sfwmd.gov>

HI Group,

 

As I am very new in python field so this question might be very silly
but If I get any help that is highly appreciated.

 

Problem: 

 

I have a python script which is working fine to upload files to the ftp
server but the problem is it is reducing the actual size after
transferring. I need to upload a GIS Shape file to the ftp server but
want to keep the same size and format. Any idea or help is highly
appreciated.

 

Thanks

Shakir

Staff Geographer

Sfwmd.gov

 

The code is as follows: 

 

 

# Import system modules

 

import os

import sys 

import win32com.client

import zipfile

import os.path

import ftplib

from ftplib import FTP

 

 

ftp=ftplib.FTP("ftp.sfwmd.gov","","")  

ftp.login('sahmed','sa1lf1sh')

#ftp.cwd("/export/pub/sahmed")

 

ffile = open('c:\\test\\wuppnt.shp', 'r')

 

ftp.storbinary("stor wuppnt.shp", ffile)

ffile.close()

 

print "OK"

ftp.quit()

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From news at alxx.org  Wed Mar 28 03:00:42 2007
From: news at alxx.org (Alex Gibson)
Date: Wed, 28 Mar 2007 17:00:42 +1000
Subject: Fortran vs Python - Newbie Question
References: <1174915232.414568.197250@p15g2000hsd.googlegroups.com>
	<1174916838.757839.143310@e65g2000hsc.googlegroups.com>
	<3f8d9$4607d352$83aef404$23393@news2.tudelft.nl>
	<1174918424.125068.176920@y80g2000hsf.googlegroups.com>
	<7o4ld4-qrv.ln1@lairds.us>
	<1174958090.292094.168150@e65g2000hsc.googlegroups.com>
Message-ID: <56uk2aF29sotsU1@mid.individual.net>


"Beliavsky" <beliavsky at aol.com> wrote in message 
news:1174958090.292094.168150 at e65g2000hsc.googlegroups.com...
> On Mar 26, 10:16 am, cla... at lairds.us (Cameron Laird) wrote:
>> In article 
>> <1174918424.125068.176... at y80g2000hsf.googlegroups.com>,Noma... at gmail.com 
>> <Noma... at gmail.com> wrote:
>
>> >Is there a mac version??
>> >Thanks
>> >Chris
>>
>> Yes.
>>
>> Several, in fact--all available at no charge.  The Python
>> world is different from what experience with Fortran might
>> lead you to expect.
>
> Your experience with Fortran is dated -- see below.
>
>>
>> I'll be more clear:  Fortran itself is a distinguished
>> language with many meritorious implementations.  It can be
>> costly, though, finding the implementation you want/need
>> for any specific environment.
>
> Gfortran, which supports Fortran 95 and a little of Fortran 2003, is
> part of GCC and is thus widely available. Binaries for g95, also based
> on GCC, are available for more than a dozen platforms, including
> Windows, Mac OS X, and Linux. I use both and consider only g95 mature,
> but gfortran does produce faster programs. Intel's Fortran compilers
> cost about $500 on Windows and Mac OS and $700 on Linux. It's not
> free, but I would not call it costly for professional developers.
>
> Speaking of money, gfortran and g95 have free manuals, the latter
> available in six languages
> http://ftp.g95.org/ . Final drafts of Fortran standards, identical to
> the official ISO standards, are freely available. The manual for Numpy
> costs $40 per copy.

Sun also provides its sun studio ide and compilers(c , c++ and fortran) free 
of charge on x86 linux
just have to register for free.
http://developers.sun.com/sunstudio/downloads/

Alex 




From david at boddie.org.uk  Mon Mar  5 21:33:41 2007
From: david at boddie.org.uk (David Boddie)
Date: Tue, 06 Mar 2007 03:33:41 +0100
Subject: Python GUI + OpenGL
References: <45e84025$0$15959$9b4e6d93@newsspool4.arcor-online.net>
	<54r59qF228m8bU1@mid.uni-berlin.de>
	<slrneuo3lh.bth.f98dawa@shii.medic.chalmers.se>
	<552vcfF2339mvU1@mid.uni-berlin.de>
	<mailman.4686.1173115324.32031.python-list@python.org>
Message-ID: <dac26$45ecd306$54d1d767$23398@news.chello.no>

On Monday 05 March 2007 18:22, Chris Mellon wrote:

> On 3/5/07, Diez B. Roggisch <deets at nospam.web.de> wrote:
>> Beside that, I do love the Qt library and would always use it in
>> preference to wx, but this is a general thing and by no means tied to the
>> OpenGL-programming. After all, that actually is done using PyOpenGL
> 
> wx and Qt support OpenGL in essentially the same manner. I believe he
> took from your earlier post that Qt had its own built in OpenGL
> wrapper (and thus didn't rely on PyOpenGL) but to my knowledge that is
> not correct.

Yes, you need PyOpenGL (or any other suitable OpenGL wrapper) to use
OpenGL with PyQt. Qt itself doesn't provide its own API for OpenGL; you
just use the implementation available on your system.

It is possible to get OpenGL-rendered 2D graphics without having
PyOpenGL installed; you just paint on a QGLWidget in the usual way.
However, I suspect that the original poster wanted to render 3D
graphics, so Python bindings to the system's OpenGL library are still
required.

David


From uselpa2 at gmail.com  Sun Mar  4 07:07:16 2007
From: uselpa2 at gmail.com (Patrick Useldinger)
Date: Sun, 04 Mar 2007 13:07:16 +0100
Subject: Python 2.5 incompatible with Fedora Core 6 - packaging problems
	again
References: <yTtGh.5001$M65.1427@newssvr21.news.prodigy.net>
Message-ID: <45eab67a@news.vo.lu>

http://www.serpentine.com/blog/2006/12/22/how-to-build-safe-clean-python-25-rpms-for-fedora-core-6/


From DustanGroups at gmail.com  Mon Mar 19 18:04:26 2007
From: DustanGroups at gmail.com (Dustan)
Date: 19 Mar 2007 15:04:26 -0700
Subject: Private data
In-Reply-To: <45fe829c$0$16064$426a74cc@news.free.fr>
References: <1174149061.416694.110480@p15g2000hsd.googlegroups.com>
	<45fe5335$0$14570$426a74cc@news.free.fr>
	<1174298781.038887.29330@b75g2000hsg.googlegroups.com>
	<45fe829c$0$16064$426a74cc@news.free.fr>
Message-ID: <1174341865.870120.234910@o5g2000hsb.googlegroups.com>

On Mar 19, 7:31 am, Bruno Desthuilliers <bruno.
42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> Dustan a ?crit :
>
>
>
> > On Mar 19, 4:09 am, Bruno Desthuilliers <bruno.
> > 42.desthuilli... at wtf.websiteburo.oops.com> wrote:
> >> Dustan a ?crit :
>
> >>>http://dustangroups.googlepages.com/privateattributesinpython
> >>> This is something that I just threw together this morning, after a
> >>> eureka moment. It's a way of creating private class attributes
> (snip)
> >>> 1. Has anyone else ever come up with something like this? I can't
> >>> imagine I'm the only person who's ever thought of this.
> >> With something like trying to forcefit access restriction in Python ?
> >> Nope, you're not the first one here. I've not seen anyone using such a
> >> thing in any of the projects I've worked on/with yet.
>
> > You ignored certain parts of my post, like "I'm not considering
> > actually using this, but I do have a couple questions about it"; I
> > assume that means you're not even going to begin to attempt to answer
> > my queries. Likewise, you ignored a similar message on the page I
> > linked to. I already knew about everything you told me.
>
> > With all this active ignoring, I get the feeling you're not even
> > trying to respond to my questions. So why respond in the first place?
> > Were you trying to be hostile?
>
> > Because I can't see any other intent
> > for your post.
>
> I didn't missed the "I'm not considering actually using this" part, but
> I missed the note on the page - and I apologize if you felt offended by
> my remarks, which were effectivly a bit on the reactive side.

Apology accepted.

> Still
> there was an implied question : *why* trying to implement access
> restriction in Python ?

My curiosity gets piqued every once in a second or so. This just
happened to be one of those occasions. I assume you read my questions;
I was curious to see if anyone else had ever thought up something as
utterly twisted and conniving as this, and how one could go about
hacking into such a construct (I might not have said it explicitly,
but I was pretty sure that there had to be a way, because it just
wouldn't be python if there wasn't a way of getting into it).



From tjreedy at udel.edu  Sat Mar 31 00:21:54 2007
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 31 Mar 2007 00:21:54 -0400
Subject: Newbie Question (real-time communication between apps: audio, 3d,
	PD, Blender)
References: <1175294306.124030.272350@l77g2000hsb.googlegroups.com>
Message-ID: <euknl3$ptd$1@sea.gmane.org>


<gregorywieber at gmail.com> wrote in message 
news:1175294306.124030.272350 at l77g2000hsb.googlegroups.com...
| Hi All,
|
| I'm just beginning my exploration of Python and I have a rather
| general question. If two particular programs have Python scripting
| capabilities, does that mean those two programs can communicate in
| real time through Python?
|
| I'm running some audio experiments (for artistic purposes) in the
| program Pure Data (PD). I would like to use data that I extract from
| audio files to affect 3-d game simulations in Blender.  I don't know
| specifically what it is I would be manipulating -- this is an artistic
| project, so intend to do a lot of experimenting to see what I come up
| with...
|
| My question(s): Is this possible, reasonable, plausible?

I would think more in terms of exchanging data packets than of exchanging 
code.

tjr





From bignose+hates-spam at benfinney.id.au  Tue Mar 13 21:29:53 2007
From: bignose+hates-spam at benfinney.id.au (Ben Finney)
Date: Wed, 14 Mar 2007 12:29:53 +1100
Subject: Eureka moments in Python
References: <pan.2007.03.13.07.16.14.411665@REMOVEME.cybersource.com.au>
Message-ID: <87odmwvcha.fsf@benfinney.id.au>

"Steven D'Aprano" <steve at REMOVEME.cybersource.com.au> writes:

> I'd be interested in hearing people's stories of Eureka moments in
> Python, moments where you suddenly realise that some task which
> seemed like it would be hard work was easy with Python.

I don't recall the exact context, but Python was the language that
introduced me to the power of a unified type system.

The application I was writing was doing a whole lot of bookkeeping of
information about what kind of data was being processed, which had to
be kept updated in parallel with the data itself. Once I realised that
"unified type system" and "first-class objects" meant that I could
simply store the *type itself* as data, whether a basic type or one of
my own, things became astoundingly easier. Soon after that I learned
that functions are also objects, and I was hooked.

I also don't think I would have been at all interested in Test-Driven
Development if I wasn't already familiar with Python's object model,
since it makes introspection and unit-test stubs and shims a
breeze. So I lay a lot of the blame on Python for getting me test
infected :-)

-- 
 \         "I may disagree with what you say, but I will defend to the |
  `\    death your right to mis-attribute this quote to Voltaire."  -- |
_o__)                      Avram Grumer, rec.arts.sf.written, May 2000 |
Ben Finney



From gigs at hi.t-com.hr  Fri Mar  9 18:23:28 2007
From: gigs at hi.t-com.hr (Gigs_)
Date: Sat, 10 Mar 2007 00:23:28 +0100
Subject: tkinter how to write
In-Reply-To: <esprcd$heb$1@zinnia.noc.ucla.edu>
References: <esnk48$m4m$1@ss408.t-com.hr> <esprcd$heb$1@zinnia.noc.ucla.edu>
Message-ID: <esq5tm$8jh$1@ss408.t-com.hr>

James Stroud wrote:
> Gigs_ wrote:
>> as I write my first gui program (text editor) I wanna ask you guys how 
>> to separate code in classes.?
>> Should I put in one class my menu and in another class text and 
>> scorllbars etc?
>>
>> or something else?
>>
>>
>> thanks
> 
> Check out Grayson: http://www.manning.com/grayson/
> 
> Its $25 for the pdf and is worth about 20 or 30 times that in the effort 
> it will take you if you attempt to re-invent the wheel.
> 
> For an example of a Tkinter code disaster from not having a good 
> reference, glimpse at the source of <http://passerby.sf.net>.
> 
> How I wish I'd just read the damn book first!
> 
> James
thx for both replies